The 1 - seminar.uny.ac.idseminar.uny.ac.id/icchem/sites/seminar.uny.ac.id.icchem/files/ABSTRACTS... · (HKI) and Universiti Pendidikan Sultan Idris, Malaysia. This conference is conducted

The 1st International Conference of Chemistry

Optimizing and Empowering Chemistry for Sustainable Development of Science and Technology

Department of Chemistry Education Faculty of Mathematics and Natural Sciences Universitas Negeri Yogyakarta Address : Jl. Colombo No. 01, Yogyakarta Email : [email protected] Website : http://seminar.uny.ac.id/icchem

Abstract Book The 1st International Conference of Chemistry (ICChem) 2018 September 28-29, 2018

Optimizing and Empowering Chemistry for Sustainable Development of Science and Technology 2

Preface

The 1st International Conference of Chemistry will be held in Yogyakarta on

September 28-29, 2018. The conference is jointly organized by Department of

Chemistry Education Universitas Negeri Yogyakarta, Himpunan Kimiawan Indonesia

(HKI) and Universiti Pendidikan Sultan Idris, Malaysia. This conference is conducted as

the media of communication for scholars and professionals on chemistry and chemistry

education from over the world to discuss their investigation findings, to create

harmonization of education on chemistry, to build and to strengthen network and to

increase branding of chemical institutions.

Topic of interest to be covered in the conference includes, but not limited to:

Analytical chemistry

Biochemistry

Inorganic chemistry

Organic chemistry

Physical chemistry

Chemistry education

This program book provides some information concerning the schedule, list of

presenter and the venue map. Hopefully, this book helps the participants for intensively

listen and get valuable information in the conference.

The scientific program of ICChem 2018 comprises the following:

Keynote Speaker : 6 papers

Invited Speaker : 2 papers

Total paper for oral presentation : 59 papers

The topics of the papers are follows:

Analytical chemistry : 6 papers

Biochemistry : 4 papers

Inorganic chemistry : 5 papers

Organic chemistry : 5 papers

Physical chemistry : 9 papers

Chemistry education : 30 papers



Table of Contents Page

Preface ……………………………………………………………………………………………………………. 2

Table of Contents ……………………………………………………………………………………………. 3

Chairperson’s Foreword …………………………………………………………………………………. 4

Dean’s Foreword ……………………………………………………………………………………………… 6

General Information of Participants …………………………………………………………………. 7

Conference Program ………………………………………………………………………………………. 9

Schedules of Parallel Sessions ………………………………………………………………………….. 11

All Abstracts of Participants …………………………………………………………………………….. 20



Chairperson’s Foreword

Assalamu’alaikum wr.wb.

First of all, let us extend our praise and thank to the Almighty Allah

SWT for health and this sunny day, so we can gather in this place to

attend this opening ceremony of International Conference of

Chemistry 2018 (ICCHEM 2018).

With my deepest gratitude, I would like to welcome all of you in a

beautiful city Yogyakarta to attend and participate to this

conference, and we hope you will enjoy your time here. This conference is part of the

activities to celebrate the 62nd anniversary of Department of Chemistry Education,

Yogyakarta State University. This is the first International Conference conducted by our

Department as the media of communication for scholars and professionals on Chemistry

and Chemistry education from over the world to discuss their investigation findings, to

create harmonization of education on Chemistry, to build and to strengthen network,

and to increase branding of Chemical institutions.

The International Conference of Chemistry 2018 (ICCHEM2018) will bring up the

captivating theme: “Optimizing and Empowering Chemistry for Sustainable

Development of Science and Technology”, as respond to increasing attention for

Chemistry and Chemistry Education that have central position on the development of

Science and Technology in the globalization era. Fast development of research results

on Chemistry and Chemistry education certainly worthy and become important when

they are shared to others and implemented.

As key note speakers in this conference, we are fortunate to have Prof. Dr. Tienthong

Thongpanchang (Mahidol University, Thailand); Dr. Hafsah Binti Taha (Universiti

Pendidikan Sultan Idris, Malaysia); Assoc. Prof. Dr. Muthuraaman Bhagavathi Achari

(University of Madras, India); Dr. rer.nat. Gerhard Marini (University of Innsbruck,

Austria); Dr. Dwi Siswanta, M.Eng (UGM); and Prof. Dr. Sriatun (UNY). We also invited

Dr. Harry Firman (UPI) as the representative of Himpunan Kimiawan Indonesia (HKI),

and Prof. KH. Sugiyarto, Ph.D (UNY) as speaker.

This conference was attended by around 150 participants. There are 59 presenters will

present their research finding, which are divide into two big topics, Chemistry and

Chemistry Education. Our high appreciation and sincere gratitude are delivered to all

speakers and presenters who enthusiastically participate in our conference.

The organizing committee is very grateful to the Rector of Yogyakarta University, the

vice chancellors and also all of our sponsors for invaluable support for this conference.



As the chairman of the committee, I personally would like to express our high

appreciation and gratitude to all team members who have put all the hard work,

dedication, and extraordinary efforts for the success of the conference.

Finally, we hope this conference will provide benefits and contributions to the

development of chemistry in Indonesia. We also hope that all participants will benefit

from participating in this conference.

Wassalamu’alaikum wr wb

Dr. Retno Arianingrum



Dean’s Foreword

May peace and God’s blessings be upon you all.

On behalf of the Committee, first of all allow me to extend

my warmest greeting and welcome to the International

Conference of Chemistry 2018 organized by Department of

Chemistry Education, Yogyakarta State University.

In the modern and globalization era, the development of

science and technology cannot be separated from our daily

lives. It becomes one of aspects that should always be

improved. The science and technology development could be

achieved if it is supported by the improvement of firm fundamental knowledge.

Chemistry and Chemistry Education have an important position on that development.

The empowerment of those fields through research and studies should be done

continuously.

With the theme of Optimizing and Empowering Chemistry of Sustainable Development

of Science and Technology, this conference is aimed to pull together researchers,

scholars, professionals, and practitioners to share their critical thinking and research

outcomes. Therefore, we are able to understand and examine the development of

fundamental principle, knowledge, and technology. By perceiving the matters and

condition in research and education field of chemistry and chemistry education, we

could take a part in conducting qualified education and steps to reach out the developed

science and technology.

This conference will be far from success and we could not accomplish what we do

without the support from various parties. So let me extend my deepest gratitude and

highest appreciation to all committee members. I would also like to thank each of

participants for attending our conference and bringing your expertise to our gathering.

Should you find any inconveniences and shortcomings, please accept my sincere

apologies.

To conclude, let me wish you a fruitful discussion during the conference. Have a very

pleasant stay and enjoy the cultural, historical, and natural beauty of Yogyakarta.

Dr. Hartono



General Information for Participants

1. Registration

The registration desk will be situated on Seminar Room, 4th floor of Digital Library

Building, Universitas Negeri Yogyakarta on September 28, 2018 start from 07.30

a.m.

2. A Polite Request to All Participants

Participants are requested to arrive in a timely fashion for all addresses. Presenters

are reminded that the time slots should be divided fairly and equally by the number

of presentations, and that they should not overrun. The session chair is asked to

assume this timekeeping role and to summarize key issues in each topic.

3. Certificate of Presentation or Certificate of Attendance

A certificate of attendance includes participant’s name and affiliation, certifying the

participation in the conference. Oral presenters will receive a certificate of

presentation at the end of conference (Saturday, September 29, 2018). The

certificate of presentation will not be issued, either at or after the conference, to

authors whose papers are registered but not presented.

4. Preparation for Oral Presentation

All presentation rooms are equipped with screen, an LCD projector and a laptop

computer installed with Microsoft PowerPoint. You will be able to insert your USB

flash drive into the computer and double check your file in PowerPoint (.ppt or

.pptx) during the registration time. We recommend you to bring two copies of the

file in case that one fails.

5. Moderator (Parallel Session) Guidelines

Arriving in the session room at least 10 minutes in advance of the session start

time. The timing and location of your session is included in the conference

program.

Introducing presenters by name, affiliation, and title of presentation at the start

of each paper.

Monitoring presentation time. Presentation has been allocated 10 minutes for

each paper. Q&A and discussion will be set after every 3 paper presentation. We

suggest that you make it very clear to each presenter before the session begins

that you will adhere strictly to the ‘10 minutes each’ rule and will interrupt when

they exceed their limit.

6. Conference Venue Information

The main session of ICCHEM will be held on Seminar Room, 4th floor of Digital

Library Building, Universitas Negeri Yogyakarta.



Meanwhile, parallel rooms will be held on building D.07 of Faculty of

Mathemetics and Natural Sciences Universitas Negeri Yogyakarta.

Adreess: Jl. Colombo No. 01, Depok, Sleman, Daerah Istimewa Yogyakarta



Conference Program Day 1. September 28, 2018

Time Event Venue 07.30 Registration Seminar Room, 4th floor

of Digital Library UNY 08.15 Opening Ceremony Seminar Room, 4th floor

of Digital Library UNY 1. Indonesian Nasional Anthem 2. Traditional Dance

08.30 Opening Speech Seminar Room, 4th floor of Digital Library UNY

1. Dr. Retno Arianingrum ICCHEM 2018 Chairperson

2. Dr. Hartono Dean of Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

3. Prof. Dr. Sutrisna Wibawa Rector of Universitas Negeri Yogtakarta

08.50 Photo Session 09.00 COFFEE BREAK 09.30 Plenary Session 1

Moderator: Prof. AK Prodjosantoso, Ph.D. Seminar Room, 4th floor of Digital Library UNY

1. Assoc. Prof. Dr. Tienthong Thongpanchang (Mahidol University, Thailand)

2. Dr. Hafsah Binti Taha (Universiti Pendidikan Sultan Idris, Malaysia) “Education 4.0. Staying Relevant as Chemistry Educationist”

11.30 LUNCH AND PRAY Lobby of Digital Library UNY

13.30 Plenary Session 2 (Teleconference) Moderator : Dr. Cahyorini Kusumawardani 3. Dr. rer.nat Gerhard Marini (University of Innsbruck, Austria) “Toxicity of Chemicals is Found out in the

Industry”

Seminar Room, 4th floor of Digital Library UNY

14.30 COFFEE BREAK 15.00 Paper Session 1 Building D.07, 2nd floor

of Faculty of Mathematics and Natural Sciences

16,30 Closing of Day 1 Note: 1. Invited speakers will present their paper on parallel session. 2. Paper/oral session will be held on building D.07 of Faculty of Mathematics and

Natural Sciences. 3. The list of presenter for oral session can be seen in schedule of parallel session.



Day 2. September 29, 2018

Time Event Venue 07.30 Registration Seminar Room, 4th floor

of Digital Library UNY 08.15 Plenary Session 3

Moderator: Dr. Cahyorini Kusumawardani Seminar Room, 4th floor of Digital Library UNY

1. Assoc. Prof. Dr. Muthuraaman Bhagavathi Achari (Madras University, India) “Materials For Green Energy Devices”

09.15 COFFEE BREAK 09.45 Plenary Session 4

Moderator: Dr. Kun Sri Budiasih Seminar Room, 4th floor of Digital Library UNY

2. Dr. Dwi Siswanta (Universitas Gadjah Mada, Indonesia) “Synthesis of Chitosan-Based Polyelectrolyte Complex and Its Adsorption-Desorption Studies for Sodium Dodecyl Sulfate And Humic Acid”

3. Prof. Dr. Sri Atun (Universitas Negeri Ypgyakarta, Indonesia) “Phytochemical and Antioxidant Evaluation Of Ethanol Extract Leaves Of Dendrophthoe falcata (Loranthaceae) Hemiparasitic On Melia azedarach Host Tree”

11.45 LUNCH AND PRAY 13.00 Paper Session 2 Building D.07, 2nd floor

of Faculty of Matematics and Natural Sciences

16,00 Closing of Day 2 Note: 1. Invited speakers will present their paper on parralel session. 2. Paper/oral session will be held on building D.07 of Faculty of Mathematics and

Natural Sciences. 3. The list of presenter for oral session can be seen in scheedule of parralel session.



Schedules of the

Parallel Sessions



Oral Presentation Schedule of ICChem 2018 Day/Date : Friday/September 28, 2018

Topic : Chemistry Education (1)

Moderator : Jaslin Ikhsan, Ph.D.

Room : Seminar Room of Faculty of Mathematics and Natural

Sciences

No Paper ID Author(s) Paper Title

1. INVITED

SPEAKER

Harry Firman Assessment of 21st century skills in

chemistry education context

2. 05 Muhd Ibrahim

Muhammad Damanhuri,

Leela Devi Palany Kumar

Case Study using Jigsaw Puzzles in Writing

the Chemical Formula of Ionic Compounds

among the 10th Grade Students

3. 39 Maria Paristiowati,

Tritiyatma H., Agung

Purwanto, Prita Atria K

Analysis of Students’ Scientific Literacy in

Contextual-Flipped Classroom Learning on

Acid-Bases Topic

4. 54 Sukisman Purtadi,

Antuni Wiyarsi,

Anggiyani Ratnaningtyas

Eka Nugraheni

The Attitude of High School Chemistry

Teacher Towards The Development of

Chemistry Teachers for Inclusion Classroom

Preparation Program

5. 14 Citra Ayu Dewi, Ratna

Azizah Mashami

Improving Creativity of Prospective

Chemistry Teacher through

Chemoentrepeneurship Oriented Inquiry

Module on Colloid Topics

Note:

1. The allocation time of invited speaker is 30 minutes, meanwhile the others is 10

minutes for each paper.

2. The Q&A and discussion will be set after the presentation of invited speaker or every

3 paper presentation




Topic : Inorganic Chemistry

Moderator : Dr. Dyah Purwaningsih

Room : D.07.2.01.10 of Faculty of Mathematics and Natural Sciences


1. INVITED

SPEAKER

KH Sugiyarto Spin State Transition in Iron(II) complex

2. 08 Nurulsaidah Abdul

Rahim, Fabrice Audouin,

Johannes G Vos, Andreas

Heise

Study of Interaction CoPcF16 within Poly 4-

vinylpyridine Matrix using UV/Vis

Spectroscopy

3. 51 Kun Sri Budiasih,

Zamhariroh Marsha,

Asmi Aris, Rama

Chrismara

Silica Nanoparticles in Slow Release

Supplement Preparation and

Characterization

4. 02 Haryo Rohmadiyanto,

Hari Sutrisno, Dyah

Purwaningsih

Structural Characterization of LiNixMn2-xO4

Prepared by Irradiation Microwave-assisted

Reflux Technique

5. 26 M. Hardi Determination of Heavy Metals

Concentration in Oilfield Produced Water in

Minas Area, Siak Regency, Riau Province,

Republic of Indonesia

6. 10 Handy Riantana, Hari

Sutrisno, Dyah

Purwaningsih

Synthesis and Characterization of

LiCrxMn2-xO4 by Simple Reflux-Microwave

Irradiation Technique

Note:

1. The allocation time of invited speaker is 30 minutes, meanwhile the others is 10

minutes for each paper.

2. The Q&A and discussion will be set after the presentation of invited speaker or every

3 paper presentation




Topic : Analytical Chemistry

Moderator : Annisa Fillaeli, M.Si.



1. 22 Arum Dwi Kurnia, Dewi

Ratnawati, Haryudini

Arsa Putri, Herdayanto S

Putro, Ratna Ediati, R.

Djarot Sugiarso K.S

Optimizing the Capability of Na2S2O3,

NH2OH.HCl, C6H8O6, Na2C2O4, and Na2SO3 to

Reduce Iron (III) to Iron (II) using UV-Vis

Spectrometry

2. 24 Regina Tutik

Padmaningrum, Siti

Marwati, Sunarto,

Sulistyani, Muhammad

Arief Nuryadin

Application of Copper(II) Oxide of

Electrocoagulation Results of Electroplating

Liquid Waste for Dyes Of Ceramic Glaze

3. 28 D W Astuti, Mudasir, N H

Aprilita

Preparation and Characterization

Adsorbent Based on Zeolite from Klaten,

Central Java, Indonesia

4. 21 Sulistyani, Susila

Kristianingrum, Endang

Dwi Siswani, Annisa

Fillaeli, Desi Fitri

Pujiyastutik

Identification of Activated NaOH Carbon of

Synthesis of Sea Pandanus Leaves (P.

odorifer) for Fe3+ and Cu2+ Ions Adsorption

5. 12 Fakhrizal Naufal, Risky

Melasari, Anita

Rahmawati, Susila

Kristianingrum

Potential Antibacterial Chitosan Silica

Modified from Bamboo Leaves

6. 27 Annisa Fillaeli, Susila

Kristianingrum, Endang

Dwi Siswani, Sulistyani,

Siti Dewi Fatimah

Synthesis activated carbon of Hala tree

leaves by 5% HNO¬3 and its properties

Note:

1. The allocation time for presentation is 10 minutes for each paper.

2. The Q&A and discussion will be set after every 3 paper presentation



Oral Presentation Schedule of ICChem 2018 Day/Date : Saturday/September 29, 2018

Topic : Physical Chemistry

Moderator : Dewi Yuanita Lestari, M.Sc.



1. 23 Hendro Juwono,Krisna Adi Nugroho, Riza Alfian, Yatim Lailun Ni’mah, Djarot Sugiarso,

Harmami

New Generation Biofuel from Polypropylene

Plastic Waste with Co-Reactant Waste

Cooking Oil and its Characteristic

Performance

2. 04 Eli Rohaeti, Endang W.

Laksono, Anna

Rakhmawati

Application of Nanoparticle to Develop

Antibacterial Composites from Sweet Potato

Wastewater

3. 20 Muflihah, Sulistyo

Prabowo

A Plain Design of Electrolysis Apparatus to

Reduce Amonia Content in Effluent From

Tofu Industry

4. 29 Suwardi, Ardani

Hamman, Nuraini

Agustina, Ria Armunanto

Structure and dynamics of Cd2+ in liquid

ammonia: Insight from An ab initio QM/MM

MD Simulations

5. 46 Eka Rahmawati Pre-treatment Glass Substrates and Post

Treatment of the Surface by Heated as

Wettability of Mono and Multilayer Chitosan

Film

6. 53 Isana Supiah Yosephine

Louise, Sulistyani

Splitting of Water Molecules (H2O) IN

Dioscorea esculenta Flour Media with

Stainless Steel Electrode

7. 33 Crys Fajar Partana,

Suwardi, Agus Salim

Structure and Dynamics of Hg2+ in Aqueous

Solution : an Ab Initio QM/MM Molecular

Dynamics Study

8. 37 Dewi Yuanita Lestari,

Endang Widjajanti

Kinetics and Termodynamic Study of

Copper (II) Adsorption on to Activated

Carbon Prepared from Zallaca Peel

9. 55 Marfuatun, Dwi Ayu

Stephanie

Synthesis and Characterization Edible Film

Based on Bacterial Cellulose with Addition

Cinnamon Oil

Note:






Topic : Biochemistry and Organic Chemistry

Moderator : Dr. Retno Arianingrum



1. 56 Busroni, Santosa, S.J.,

Siswanta, D., Jumina

One Step Synthetic Method of p-Tert.

butylcalix[4]arene Derivative via Direct

Benzoylation: Regioselective

2. 19 Oktanio Sigit Prawoko,

Fakhrizal Naufal, Anita

Rahmawati, Nurfina

Aznam

Formulation and Testing of Antibacterial Activity of Transparent Solid Soap Extracts of Ethanol Fruit Lerak ( Sapindus rarak ) Against the Growth of Staphylococus aureus and Escherichia coli Bacteria

3. 09 I.M. Sudarma, M.G.

Darmayanti, Sarkono

Antibacterial Activities of New and Known

Compounds Prepared from Eugenol

4. 36 Rudiana Agustini, I Gusti

Made Sanjaya, Lupita

Characterization of Yeast Hydrolysate

Enzymatic (YHE) from Yeast That Was

Fermented in The Variation of Rice Flour

5. 17 Nikman Azmin, Anita

Rahmawati, Maya

Ekaningtias

Traditional Medicine Tropical Factory Tests

as a Local Survival Of Regional Community

Bima

6. 63 Ilyas Gistiana, Asmi Aris,

Hafizhoh Hanafia, Retno

Arianingrum

Utilization of Used Cooking Oil as Raw

Material for Soap Production to Reduce

Household Waste

7. 50 Joko Wahyono, Cornelia Budimarwanti

Synthesis of Methyl Citronellate Through

Fischer Esterification Reaction Between

Methanol and Citronellic Acid From

Oxidation Product of Citronellal

8. 13

Tuti Asaroh, Sri

Handayani, Susila

Kristianingrum, Anna

Rakhmawati

Quality Test of Clove Oil-Soap Based On

Indonesian National Standard (SNI) And Its

Activity Test as Antibacterial Against

Escherichia Coli

9. 44 Retno Arianingrum,

Rama Chrismara, Widya

NurRamadhina

Antioxidant Activity of p-Hidroxy-m-Methoxy-Chalcone and Its Combination with Doxorubicin

Note:







Moderator : Sukisman Purtadi, M.Pd.



1. 34 Endang W Laksono, Eli

Rohaeti, Suyanta, Ihda

Nur Rahmah

The Effect of Problem-Based Learning

Model Toward Students’ Self-Regulated

Learning on Rate Reaction Matter

2. 35 Endang. W. Laksono,

Suyanta. and Novia Fitri

Fadhilah

Applying of Problem Based-Learning Model

on Learners’ Integrated Abilities on Acids

and Bases Solution Matter

3. 38 E Lutviana, S B Rahardjo,

E Susanti, S Yamtinah, S

Mulyani, S Saputro

The Computer-Assisted Testlet Assessment

Instrument to Measure Students’ Learning

Difficulties in Chemical Bonding

4. 31 M. G. Devi, N. Aznam The effect of science technology society

model on science literacy and science

attitude of students on the subject of buffer

5. 25 Faza Amaliya, Isana

Supiah Y L

Survey on the implementation of 2013

Curriculum process standard of chemistry

subject learning in Public Senior High

Schools of Yogyakarta

6. 45 M K Nais, K H Sugiyarto,

J Ikhsan

Virtual chemistry laboratory (virtual chem-

lab): potential experimental media in hybrid

learning

7. 43 Febrian Solikhin, Jaslin Ikhsan, Kristian Handoyo Sugiyarto

An Analysis in Developing Virtual

Laboratory According to the Chemistry

Teachers

8. 40 D Ernawati, J Ikhsan Enjoyful Learning in Chemical Bonding

Concept Using Augmented Reality (AR)

Technology

Note:



https://phet.colorado.edu/sims/html/acid-base-solutions/latest/acid-base-solutions_en.html






Moderator : Dr. Antuni Wiyarsi


No Paper ID Author(s) Paper Title 1. 06 Yuli Rahmawati, Achmad

Ridwan, Arif Rahman, Fera Kurniadewi

Chemistry Students’ Identity Empowerment through Etnochemistry in Culturally Responsive Transformative Teaching (CRTT)

2. 07 Yuli Rahmawati, Achmad Ridwan, Tritiyatma Hadinugrahaningsih, Soeprijanto

Developing Critical and Creative Thinking Skills through STEAM Integration in Chemistry Learning

3. 11 Mia Isnaningrum, Umi Sayidatus Zakiya, Luthfan Ihtisyamuddin, Antuni Wiyarsi

Analysist of student’s Misconception on Acids Bases Concept

4. 16 Budi Utami, Sulistyo Saputro, Ashadi, Mohammad Masykuri

Measuring Students’ Critical Thinking in Essay Writing: a Case Study in Higher Education

5. 59 Febrianto, Antuni Wiyarsi, Crys Fajar Patana, Bambang Sulistyo

Chemistry in context: The development of hydrocarbon chemistry and petroleum (HCP) module based on vehicle case

6. 57 Ika Putri Utami, Jaslin Ikhsan

Development of Atomic Structure Learning Media with 3 Dimension Ilustration (3D) based on Android with Augmented Reality Technology for SMA/MA

7. 49 Eti Sukriani, Sri Atun Applying Science Technology and Society Approach towards Psychomotor Skills of High School Students in Acid and Base

8. 32 Renny Wijayanti, Kristian

Handoyo Sugiyarto, Jaslin

Ikhsan

Effectiveness of Using Virtual Chemistry

Laboratory Integrated Hybrid Learning to

Students’ Learning Achievement 9. 48 Antuni Wiyarsi, Heru

Pratomo, Erfan Priyambodo, Marfuatun

Chemistry Enrichment in Tourism Vocational School: The development and Validation of Food Additives Module

Note:







Moderator : Erfan Priyambodo, M.Si.



1. 41 Hilda Nita Pramesthi,

Ashadi Ashadi, Sulistyo

Saputro

Analyzing Scientific Approach and Problem

Solving in Salt Hydrolysis Topic

2. 42 Menik Purpuniyanti, M.

Masykuri, Maria Ulfa

Analysis of Needs on Computer-Based

Testlet Test Models

3. 47 Nurlaidy M. Syawal,

Amanatie

Implementing The Scientific-Based Jigsaw

Model on Self-efficacy and Cognitive

Achievement

4. 52 Z Latifah, J Ikhsan, K H

Sugiyarto

Influence of Virtual Chemistry Laboratory

Utilization (VCL) toward Cognitive Learning

Achievement

5. 58 Handari Febiana, Crys

Fajar Partana, Antuni

Wiyarsi, Bambang

Sulistyo

Automotive Engineering Chemistry Module :

Exploring Acid Base And Electrochemistry

Topic In Vehicle Context

6. 62 D F Syolendra, E W

Laksono

The Effect of Discovery Learning on

Students’ Integrated Abilities and Creativity

7. 61 L A Lungan, E W

Laksono2

Implementating Guided Inquiry: The

Influence Towards Students’ Activities and

Communication Skill

8. 60 Aryati Wibowo Student’s Integrated Ability and Activity of

Eleventh Grade Students Learned through

Learning Cycle 7E

9. 30 E. Priyambodo, A.

Wiyarsi, A.R.E.

Nugraheni, Dina

Integrating Chemical Literacy on Android

Based Assessment for High School Students’

Note:





All Abstracts of

Participant



Keynote Speaker Keynote Speaker 1

EDUCATION 4.0. STAYING RELEVANT AS CHEMISTRY EDUCATIONIST

Hafsah Taha

Sultan Idris Education University, Malaysia.

-

B. Muthuraaman

Department of Energy, University of Madras, Guindy campus,

Chennai 600 025, INDIA

In the present scenario energy needs of our rapidly growing population continue to expand; a significantly larger fraction of our energy supply will need to be sourced from renewable sources in the very near future. Rapid depletion of fossil fuels and growing environmental concerns pose serious scientific and technological challenges to address the increasing global demand for energy. In view of these, energy will be the greatest challenge facing humankind in the 21st century. Development of alternative, sustainable, clean energy technologies is needed to address this inevitable challenge. The electrolytes play a vital role in making efficient renewable energy devices most particularly polymer based ones. Why we prefer Polymers? As a technological approach, they are unrivalled in terms of processing cost, processing speed, processing simplicity



and thermal budget. There are, however, unsolved problems of low power conversion efficiency, materials cost and environmental impact. Nanomaterials and nanotechnology combined with novel synthesis approaches offer great potential to develop new materials that can lower the cost, improve the performance, and enhance the commercial viability of electrochemical energy storage and conversion technologies, such methodologies could also help other electrochemical energy technologies like solar cells, batteries, supercapacitors etc. Successful development of low cost, more efficient materials will powerfully impact the increasing global demand for energy and our environment.

Design of Chiral Derivatizing Agents with Constrained Aromatic Residue for NMR

Shift Difference Method

K. Dolsophon,a J. Soponpong,a S. Sungsuwan,a N. Ruangsupapichart,a J. Kornsakulkarn,b C. Thongpanchangb and T. Thongpanchanga,b*

aDepartment of Chemistry and Center for Innovation in Chemistry, Faculty of Science,

Mahidol University, Rama 6 Road, Bangkok 10400 Thailand. bNational Center for Genetic Engineering and Biotechnology, Thailand Science Park,

Klong Luang, Patumthani 12130 Thailand. E-mail: [email protected]

The application of chiral derivatizing agents (CDAs) with the NMR shift

difference method is one of the most frequently used protocols to identify the absolute

configuration of natural products. Chiral derivatizing agents, tetrahydro-1,4-

epoxynaphthalene-1-carboxylic acid (THENA) and its derivatives, having a syn-

periplanar arrangement of O–C –C=O as a part of the bicyclic system to lock the

aromatic residue conformation, were introduced. These new CDAs offered good

lute configuration,

when being used in the determination of the absolute configuration of chiral secondary

alcohols.

References

-

-



Applied Chemistry: Evaluating the Non-Toxicity of Chemicals Used in Products

Gerhard Marini

University of Innsbruck, Austria

Chemicals used in products, such as cosmetics, toys, consumer electronics or

medical devices, have to be non-toxic. Different non-regulary frameworks may apply,

depending on product categoryas well as national or regular requirements. Still, the

general concepts of determining the toxicity profile of a chemical are universal. The

presentation will give an overview of the most-common biological effects of chemicals

and how these potential toxicity modes are investigated in the industry via in-silico, in-

vitro, and in-vivo models before the products put on the market.

SYNTHESIS OF CHITOSAN-BASED POLYELECTROLYTE COMPLEX AND ITS

ADSORPTION-DESORPTION STUDIES FOR SODIUM DODECYL SULFATE AND

HUMIC ACID

Dwi Siswanta

Department of Chemistry, Universitas Gadjah Mada

Sekip Utara, Yogyakarta, Indonesia

A series of polyelectrolyte complex films (PEC) had been prepared using chitosan

as polycationic polymer and pectin, alginate, κ-carrageenan as polyanionic polymers.

The PEC films were characterized using FTIR, SEM, swelling, and its stability in the acid-

base medium. The parameters used for sodium dodecyl sulfate (SDS) adsorption study

were the optimum composition of PEC film, contact time, pH of the medium, the initial

concentration of SDS, and its desorption ability. The FTIR spectra showed the typical

peak for the interaction of the polycationic and polyanionic polymer. The morphological

change of the surface of PEC films was observed before and after adsorption and

desorption. changed after used for SDS adsorption into the smoother one that was

analyzed with SEM. The swelling percentage of PEC films was observed to have a strong

correlation to the adsorption capacity. The PEC formation was found to be able to

stabilize the film at a wide range pH. For the three PEC films: chitosan/pectin;

chitosan/alginate and chitosan/carrageenan, the results showed that the composition of

PEC will generally be better at higher chitosan compositions (7:3 or 9:1). The SDS

adsorption was faster (120-180 minutes) than humic acid adsorption (480 minutes),

but both adsorbates tended to follow the pseudo-second-order kinetics and Freundlich

isotherm model. Adsorption of SDS and humic acid were optimum in the pH range of 5-

6. The desorption SDS from the three PEC films will be effective when using 0.1 M



NaClO4 solution, while for the desorption of humic acid were more effective using 1 M

NaOH solution.

Keynote Speaker 6

PHYTOCHEMICAL AND ANTIOXIDANT EVALUATION OF ETHANOL EXTRACT

LEAVES OF Dendrophthoe falcata (LORANTHACEAE) HEMIPARASITIC ON Melia

azedarach HOST TREE

Sri Atun*, Zulfa Qurrota A’yun, Nurul Lutfia, Sri Handayani

Dept. of Chemistry Education, Faculty Mathematic and line Natural Science, Universitas

Negeri Yogyakarta, Indonesia,

Jl. Colombo No. 1 Depok, Sleman, Yogyakarta, Indonesia, 55281 *Corresponding author: [email protected]

The purpose of this study was to analyze the total phenolic and flavanoid

compounds content and to test antioxidant of ethanolic extract leaves of Dendrophthoe

falcata hemiparasite on Melia azedarach. This research method was carried out by

maceration of 2.5 kg dryed powder of D. falcata leaf with ethanol. The ethanol extract

was partitionated three times by n-hexane, chloroform, and ethyl acetate respectively.

Each fraction were identification total phenolic and flavanoid compound by

spectroscophy method and to test antioxidant and antimicrobial. Antioxidant was

tested by 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. The crude ethanol extract,

chloroform fraction, etyl acetate fraction, and residual ethanol fraction leaves of D.

falcata showed a total phenolic content as much as 670.0± 2.83, 1363.3 ±3.21, 1675.0±

2.70, 1072.5±5.40 mg Gallic Acid Equivalen (GAE)/g) respectively, while flavanoid total

content 386.4± 1.1, 347.5± 1.9, 731.4± 2.8, and 354.4± 3.8 mg Rutin Equivalent (RE)/g)

respectively. The results of the antioxidant assay show total ethanol extract, n-hexane

fraction; chloroform fraction, ethyl acetate fraction, and residual of ethanol fraction leaf

of D. falcata with the IC50 value 12.62 ± 0.15, 392.07± 4.22, 12.28± 0.42, 6.66±0.11, and

9.65±0.52 µg/ml respectively. The study suggests that leaves of D. falcata have potential

phenolic compounds could be suitable for natural antioxidant.

Invited Speaker 1 ASSESSMENT OF 21st CENTURY SKILLS IN CHEMISTRY EDUCATION CONTEXT

Harry Firman

Department of Chemistry Education, Universitas Pendidikan Indonesia

Jalan Setiabudi 229 Bandung 40154

Corresponding author: [email protected]

mailto:[email protected]



The 21st century skills have been main orientation of education practice globally,

including chemistry education. It comprises three core components namely thinking

skills, actions skills, and skills for living in the world. Learning chemistry in 21st century

is characterized by emphasizing higher order thinking skills, practising collaborative

and communication, strengthening digital and technology literacy, as well as insisting

global understanding and readiness for college and career. To make fully alignment

among curriculum, instruction and assessessment, assessment practices in school need

to be widened from single-method of testing into multi-method assessment, including

performance assessment and self- and peer-assessment methods

Invited Speaker 2

Spin State Transition in Iron(II) complex

Kristian H. Sugiyarto

Iron(II) has been known to exist as high-spin (5T2) and low-spin (1A1) states. The first and the second states are due to the weak and strong ligand fields of the the corresponding complexes respectively. The magnetic moments of the two states are then immediately distinguished, being about 4.9-5.4 BM due to four unpaired electrons, but 0-0.6 BM due to no unpaired electrons in the corresponding electronic configuration of 3d6 system for the former and the latter respectively. It could be reasoanably understood that in the “mid” ligand field strength the magnetic moment may no longer reflect neither fully high-spin nor fully low-spin but to be in beetwen the two, and thus in this situation the concentration of the two fractions may be induced by temperature or pressure. Thus, the term spin-state transition or spin crossover in iron(II) or spin equilibium of 1A1 ↔ 5T2 are then introduced. Indeed many complexes of [FeN6]2+ were found to be temperature dependent associated with the spin-state transitin. In this paper, the iron(II) complexes of six N-coordinating agent of five-six membered rings and its character of magnetism, Mössbauer and UV-Vis electronic spectra as well as bond lengths are discussed. Key words: iron(II), spin-state, spin transition, Magnetic moment, Mössbauer.



Analytical Chemistry

Paper 1 (Paper ID: 12)

POTENTIAL ANTIBACTERIAL CHITOSAN SILICA MODIFIED FROM BAMBOO LEAVES

Fakhrizal Naufal1, Risky Melasari2, Anita Rahmawati3, Susila Kristianingrum4

1, 2, 3, 4 Department of Chemistry, Faculty of Mathematics and Natural Sciences,

Yogyakarta State University, Indonesia

email: [email protected]

The synthesis and characterization of chitosan of silica modified from bamboo

leaf and its potential as an antibacterial agent. Bamboo leaves were calcined at 800 °C

and washed with 0.1 N HCl to remove impurities and resulting in silica-colored silica

with a yield of 70%. The results of the XRD characterization show the bamboo-shaped

silica of crystalline leaves, indicated by a sharp peak Results were compared with

standard JCDS silica and there was a similarity of 2θ results of FTIR characterization of

bamboo leaf silica showed the presence of a -OH functional group at uptake of 3749.62

cm-1, Si-O-Si functional group at 1095.57 cm-1, Si = O functional group at 478.35 cm-1.

Characteristic of silica chitosan characterized by absorption shift become bigger this is

because of interaction with silica active group. 3433.39 cm-1 absorption indicates the

vibration of O-H and vibration of N-H this shows the interaction of NH groups in silica

with OH groups on silica The absorption at wave numbers 1627.92 cm-1 and 1566.2 cm-

1 on chitosan-silica composite spectra showed typical absorption of chitosan ie the

amide band I and the amide II band The absorption at the 1095.57 cm-1 wave number

indicates the absorption of Si-O-Si vibration These results indicate the presence of

positively charged active groups that can interact with negative material outside the

microbial cell wall so that potentially inhibits the growth of bacteria


IDENTIFICATION OF ACTIVATED NaOH CARBON OF SYNTHESIS of SEA PANDANUS

LEAVES (P. odorifer) FOR Fe3+ AND Cu2+ IONS ADSORPTION

Sulistyani*, Susila Kristianingrum, Endang Dwi Siswani, Annisa Fillaeli, Desi Fitri

Pujiyastutik

Department of Chemistry, Yogyakarta State University. Indonesia

[email protected]

This research is aim to characterize activated NaOH carbon of sea pandanus

leaves (P. odorifer) which include water content, ash content, volatile content, carbon





content, adsorption capacity of iodine, and particle size. Further, we investigate

adsorption capacity of activated NaOH carbon to Fe3+ and Cu2+ ions, and its adsorption

type. Sea pandanus leaves (P. odorifer) was taken from Kulonprogo Trisik Beach. The

carbonation process is carried out at a temperature of 500 °C, followed by chemical

activation using 1% NaOH solution and physical activation with a temperature of 700 oC

while carbon dioxide gas flowed for 2 hours. Identification of capacity of activated

carbon to heavy metals is conducted in batch. The characterization results show that

water content and iodine adsorption capacity of activated NaOH carbon complied with

SNI 06-3730-1995, respectively of 5.38% and 2463.63 mg/g. While the volatile content

(59.09%), ash content (17.88%), carbon content (17.66%) did not fulfill SNI 06-3730-

1995. The adsorption capacity of activated NaOH carbon to heavy metal ions of Fe3+ and

Cu2+ respectively is 0.895 and 0.996 mg/g.


OPTIMIZING THE CAPABILITY OF Na2S2O3, NH2OH.HCl, C6H8O6, Na2C2O4, AND

Na2SO3 TO REDUCE IRON(III) TO IRON(II) USING UV-VIS SPECTROMETRY

Arum Dwi Kurnia, Dewi Ratnawati, Haryudini Arsa Putri, Herdayanto S Putro, Ratna

Ediati, R.Djarot Sugiarso K.S

Department of Chemistry, Faculty of Science, Institut Teknologi Sepuluh Nopember

Campus ITS Sukolilo, Surabaya 6011, INDONESIA

e-mail : [email protected]

The aim of this study is to investigate the optimum conditions (pH, time and

concentration) of Na2S2O3, NH2OH.HCl, C6H8O6, Na2C2O4, and Na2SO3 reducing agents

using UV-Vis spectrometry. The maximum wavelength had been set to 510 nm. As

result, the optimum pH of acetate buffer for Na2S2O3, NH2OH.HCl, C6H8O6, Na2C2O4, and

Na2SO3 reducers were gained at 4.5, 4.5, 4.5, 5, and 4, respectively. Whilst the optimum

time for each Na2S2O3, NH2OH.HCl and C6H8O6 reducers were 15 minutes, the outcome

for the Na2C2O4 and Na2SO3 reducers took longer which are 45 minutes and 30 minutes.

As for optimum concentration, The results were various as Na2S2O3, NH2OH.HCl, C6H8O6,

Na2C2O4 and Na2SO3 were at 11, 8, 5, 12, 60 ppm, in consecutive order. In addition to

conclude the work, the recovery percentage were calculated and the result were

Na2S2O3 (87,68%), NH2OH.HCl (116,00%), C6H8O6 (98,068%), Na2C2O4 (85,97%), and

Na2SO3 (103,44%) .




APPLICATION OF COPPER(II) OXIDE OF ELECTROCOAGULATION RESULTS OF

ELECTROPLATING LIQUID WASTE FOR DYES OF CERAMIC GLAZE

Regina Tutik Padmaningrum, Siti Marwati, Sunarto, Sulistyani, Muhammad Arief

Nuryadin

Department of Chemistry, Yogyakarta State University, Indonesia


This study aims to determine the effect of combustion temperature and the

influence of copper(II) oxide concentration on ceramic glaze color. Electroplating liquid

waste contains copper(II) ions of 178.4510 ppm. Electrocoagulation method with

optimum conditions for copper(II) ions is used to produce colored coagulants of copper.

The results of the coagulant characterization with XRF showed copper(II) content of

(22.04 ± 0.73)%. The contents of other metals such as Cr, Cd, and Pb are below the

detection limit of the XRF device. Coagulant is a metal hydroxide which is dried and

calcined so that an oxide form is applied as a glaze ceramic dye. Based on the analysis of

homogeneity using chromameter, we obtained data that the L* value increased at the

combustion temperature of 999 and 1060 oC, but at a temperature of 1101 0C it

decreased. The value of a* decreases when the combustion temperature is raised.

Decreasing the L* value indicates the brightness on the surface of the ceramic glaze is

decreasing. Meanwhile, the decrease in a* value indicates a reduction of green color on

the ceramic glaze surface. The value of b* is directly proportional to the increase in the

temperature of ceramic glaze burning. Increasing the value of b* indicates an increasing

yellow color. L* and a* data also decreased in value when the metal oxide concentration

was increased, while the b* value increased at a concentration of 0.88 and 1.76%, but at

a concentration of 2.64 and 3.53% decreased.


SYNTHESIS ACTIVATED CARBON OF HALA TREE LEAVES BY 5% HNO3 AND ITS

PROPERTIES

Annisa Fillaeli, Susila Kristianingrum, Endang Dwi Siswani, Sulistyani, Siti Dewi Fatimah

Department of Chemistry, Faculty of Mathematics and Natural Sciences, Yogyakarta State

University, Indonesia

Email: [email protected]

The leaves of Hala tree which contain natural cellulose were used as sources of

carbon to prepare activated carbon. Contained 28-30% of water, the leaves were dried

for 3-5 days by sunlight. The pyrolysis process of dry leaves yielded 25.7% of carbon




followed by grounding and sifting steps to 80 mesh of particle size. This uniform

particles were mixed with 5% HNO3 activator in batch system for 24 hours. Physical

activation conducted at 7000C and obtained 70.8% activated carbon. The

characteristics of activated carbon were compared to the carbon base by using

porosimeter, referencing to SNI 06-3730-1995 and finding the adsorption isotherm

patterns. Activated carbon surface area was 337.9 m2/g that classified as micro-pore

substance. In accordance to SNI requirements, the activated carbon fulfilled water

content, ash content and adsorption capacity of I2 while the study of adsorption

isotherm patterns showed that the activated carbon tend to follow Freundlich model for

all metal solutions of Cu, Cd, Fe, Zn respectively.


PREPARATION AND CHARACTERIZATION ADSORBENT BASED ON ZEOLITE FROM

KLATEN, CENTRAL JAVA, INDONESIA

D W Astuti1,2, Mudasir1*, N H Aprilita1

1Chemistry Department, Faculty of Mathematics and Natural Sciences, Gadjah Mada

University, Yogyakarta 55281, Indonesia 2Medical Laboratory Technology Department, STIKES Guna Bangsa Yogyakarta, 55283,

Indonesia

*Email: [email protected]

The aim of this study was to prepare and characterize a potential adsorbent

based on zeolite from Klaten, Central Java, Indonesia. The pre-treatment of natural

zeolite (ZA) consists of chemical activation using HCl (ZAA) and NaCl (ZAT). Cationic

surfactant benzalkonium chloride was used for modification of the zeolitic surface. ZA,

ZAA, ZAT, and modified zeolites were characterized by FTIR, XRD, and AAS. The cation

exchange capacity (CEC) of the natural zeolite measured by 1 M NH4OAc method.

Results show that the higher Si/Al ratio was achieved when natural zeolite was

activated by the strong acid of HCl, but acid activation did not change the structure of

the zeolite itself. The result of XRD analysis supports the AAS analysis result in which

the degrees of crystallinity of zeolite increased after acid activation. The studies by FTIR

and XRD analysis indicated that the zeolite structure remained unchanged after the

modification with the cationic surfactant. Thus the activated and modified zeolites

create a new material adsorbent to reduce pollutants in the environment.




Biochemistry


TRADITIONAL MEDICINE TROPICAL FACTORY TESTS AS A LOCAL SURVIVAL OF

REGIONAL COMMUNITY BIMA

Nikman Azmin1, Anita Rahmawati2, Maya Ekaningtias3

Sekolah Tinggi Keguruan dan Ilmu Pendidikan (STKIP) Bima, Nusa Tengara Barat,

Indonesia

e-mail: [email protected]

Utilization of medicinal plants in traditional medicine by the community of Bima

around the mountain area Bima regency which is one form of local wisdom that must be

maintained by the community. The purpose of this study was to determine the content

of secondary compounds contained in traditional medicinal plants that play an active

role in the treatment of various diseases. Phytochemical tests were performed to

identify the active compound content of plants. Leaf-derived medicinal plants and

phytochemical tests are Muntingia calabura, Phyllanthus urinaria, Ageratum

conyzoides, Manilkara zapota, Momordica charantia. The method in this research is

phytochemical screening method to know the content of secondary metabolite

compounds such as alkaloids, flavonoids, steroids, terpenoi and saponins. The results

showed that phytochemical screening test of medicinal plant extracts analyzed showed

that 4 plant samples contained flavonoid compounds, 1 sample did not contain

flavonoids, 4 samples contained alkaloid compounds, 5 samples containing steroid and

terpenoi compounds, 4 samples containing saponin compound, 1 sample does not

contain saponins


CHARACTERIZATION OF YEAST HYDROLYSATE ENZYMATIC (YHE) FROM

YEAST THAT WAS FERMENTED IN THE VARIATION OF RICE FLOUR

Rudiana Agustini1), I Gusti Made Sanjaya2), Lupita3)

1,2,3)Department of Chemistry, Faculty of Mathematic and science,Surabaya State

University, Indonesia


Research has been conducted to determine the chemical and physical

characteristics of Yeast Hydrolysis Enzymatic (YHE) based on its fermentation media.



The fermentation medium used is white rice, red rice and black rice. The procedures

carried out include the sample preparation, the fermentation, making pineapple crude,

the enzymatic hydrolysis stage. In this study measured chromium (III) or Cr3+ levels

using voltammetry method, and measurement of protein content using Kjedhal method.

There are three kind ofYHE: YHE from yeast which is grown in white rice (YHE-white

rice), red rice (YHE-red rice), and black rice (YHE-black rice). YHE from yeast which is

grown in various growth media has different chromium (III) or Cr3+ levels. The lowest

yield of chromium (III) was YHE-white rice which was 32 x 10-5%, while YHE-brown

rice was 37 x 10-5% and YHE-black rice was 40 x 10-5 %. Protein level of YHE-white rice,

YHE-red rice, and YHE black rice were respectively 38.45%; 38.48%; 39.23%. Protein

levels have increased when compared with the protein content of the fermentation

medium.


ANTIOXIDANT ACTIVITY OF p-HIDROXY-m-METHOXY-CHALCONE AND ITS COMBINATION WITH DOXORUBICIN

Retno Arianingrum, Rama Chrismara, Widya NurRamadhina

Department of Chemistry, Faculty of Mathematics and Natural Sciences,

Universitas Negeri Yogyakarta, Indonesia e-mail: [email protected]

Chalcone is an intermediate compound in flavanoid biosynthesis in nature. The

compound has a variety of interesting biological activities, including as an antioxidant and anticancer. Antioxidants are molecules that can retard or prevent the oxidation process or inhibit the formation of free radicals. p-Hydroxy-m-Methoxy-Chalcone (pHmMC) is a chalcone derivative which has anticancer activity in single and in combination use with Doxorubicin (DOX). DOX is one of chemoterapy agents widely used in cancer treatment but it has side effects of cardiotoxicity. This effect is generally associated with free radical formation. This study aims to examine the activity of pHmMC as an antioxidant both in single use and in combination with DOX. Activity tests as antioxidants were carried out by Chow method using DPPH (1,1-diphenyl-2- picrylhydrazyl). Butyl Hydroxy Toluent (BHT) and ascorbic acid (Vitamin C) were used as a positive control. Antioxidant activity is calculated as the value of 50% Inhibition Concentration (IC50). The results of the antioxidant activity test showed that the IC50 values of BHT, Vitamin C, pHmMC and DOX were 7, 3, 12 and 30 microgram/mL respectively. These results indicate that pHmMC has the potential as an antioxidant. The combination of pHmMC -DOX shows that pHmMC increase DOX antioxidant activity in combination use.




UTILIZATION OF USED COOKING OIL AS RAW MATERIAL FOR SOAP PRODUCTION

TO REDUCE HOUSEHOLD WASTE

Ilyas Gistiana1), Asmi Aris1), Hafizhoh Hanafia1), Retno Arianingrum1)

1) Department of Chemistry Education, Faculty of Mathematics and Natural Sciences,

Yogyakarta State University, Indonesia a) Coresponding author : [email protected]

The use of cooking oil in various food preparations causes used cooking oil as

one of household waste. The content of free fatty acids in used cooking oil is very high,

so it can be used as raw material for non-food industries such as soap. This study aims

to produce soap using raw materials from cooking oil waste and NaOH. The waste used

is cooking oil which has been used 3, 5 and 7 times for frying, while the concentration of

NaOH used is 5, 10 and 15 grams dissolved in 27 ml of distilled water. The

characteristics of the soap products carried out by testing include: acidity, moisture

content, free fatty acid content and free alkali content in accordance with soap quality

standards SNI 06-3532-1994. The degree of acidity was analyzed by potentiometric

method, water content by thermogravimetric method, free fatty acid levels with

alkalimetry method and free alkali content by acidimetry method. The results of this

study indicate that cooking oil waste that has been used 3, 5, and 7 times can be used as

raw material for soap making using NaOH with a concentration of 5 to 10 grams / 27 ml.

The soap products have fulfilled the soap quality standards according to SNI 06-3532-

1994. Thus, cooking oil waste has the potential to provide benefits to the community in

overcoming one of the household wastes.




Inorganic Chemistry


STRUCTURAL CHARACTERIZATION OF LiNixMn2-xO4 PREPARED BY IRRADIATION

MICROWAVE-ASSISTED REFLUX TECHNIQUE

Haryo Rohmadiyanto, Hari Sutrisno, Dyah Purwaningsiha

Department of Chemistry Education, Faculty of Mathematics and Natural Sciences,

Universitas Negeri Yogyakarta, Indonesia a) Corresponding author: [email protected]

This study aims to synthesize Ni-doped LiNixMn2-xO4 (x=0; 0.02; 0.04; 0.06; 0.08;

0.1) by irradiation microwave-assisted reflux technique. The microstructure of products

investigated by the mole ratio of Ni/Mn of precursors. Structural analysis of LiNixMn2-

xO4 was analyzed by x-ray diffraction equipped with U-Fit program package. It was

found that doping with Ni could change the size, crystallinity, and microstructure of

LiNixMn2-xO4. The LiNixMn2-xO4 solids have a cubic structure with a space group of Fd-

3m. Increased content of doping does not affect the structure. The average volume

LiNixMn2-xO4 is about 555 Å3 to 580 Å3. The crystallinity of the solids tends to increase

with the increase of Ni content. However, the increase of Ni content in the product

causes the unit cell lattice parameter decreases.


STUDY OF INTERACTION CoPcF16 WITHIN POLY 4-VINYLPYRIDINE MATRIX USING

UV/VIS SPECTROSCOPY

Nurulsaidah Abdul Rahim1,*, Fabrice Audouin2, Johannes G Vos2, Andreas Heise2,3

1Department of Chemistry, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim,

Perak, Malaysia 2School of Chemical Sciences, Dublin City University, Dublin 9, Ireland

3School of Pharmacy, Royal College of Surgeons in Ireland, Dublin 2, Ireland,

*Corresponding author: [email protected]

Metallophthalocyanine (MPc) complexes based on abundant transition metals

has greatly interest as catalyst due to their attractive features including a rich redox

behaviour, the potential to bind with metals or non-metals in the central cavity. Among

the transiton metal, cobalt complexes as electrocatalyst are preferable due to their

efficient catalytic activity. Immobilisation of the catalyst onto surface may improve with




the poly 4-vinylpyridine (P4VP) as polymer backbone. However, aggreagation of MPc is

the challenge to overcome. The aim of this study to investigate the interaction

behaviour of cobalt(II) hexadecfluorophthalocyanine (CoPcF16) within poly 4-

inylpyridine (P4VP) using UV/Vis spectroscopy. Two solution of CoPcF16 and P4VP were

mixed and the interaction of CoPcF16-P4VP was observed through time using UV/Vis

spectroscopy at wavelength 500 to 750 nm. The results suggest that coordination of the

electrocatalysts is favoured by the presence of a high concentration of 4VP. Later, this

CoPcF16-P4VP electrocatalyst have a potential for water splitting or hydrogen

generation.


SYNTHESIS AND CHARACTERIZATION OF LiCrxMn2-xO4 BY SIMPLE REFLUX-

MICROWAVE IRRADIATION TECHNIQUE

Handy Riantana1, Hari Sutrisno1, Dyah Purwaningsih1

1Department of Chemistry Education, Faculty of Mathematics and Natural Sciences,

Universitas Negeri Yogyakarta, Indonesia


LiCrxMn2-xO4 (x=0; 0.02; 0.04; 0.06; 0.08; 0.1) have been successfully synthesized

by simple reflux-microwave irradiation technique. The structure of the product was

evaluated based on the mole ratio of Cr/Mn. The structural analysis of LiCrxMn2-xO4 was

analyzed by X-Ray Diffraction equipped with the U-Fit package program. It was found

that doping with Cr could change the size, crystallinity, and microstructure of LiCrxMn2-

xO4. The LiCrxMn2-xO4 solids have a cubic structure with the space group of Fd-3m. The

increase of the mole ratio does not affect the space group. The crystallinity of the solid

tends to decrease with the increase of Chromium. However, the increase of Cr content in

the products causes the increase in the lattice parameters of the unit cells and makes

the products’ volume size bigger, ranging from 540 A3 to 565 A3.


DETERMINATION OF HEAVY METALS CONCENTRATION IN OILFIELD PRODUCED

WATER IN MINAS AREA, SIAK REGENCY, RIAU PROVINCE, REPUBLIC OF

INDONESIA

M Hardi

Student of Environmental Science Program, University of Riau, Patimura, Kota Pekanbaru,

Riau, 28127 Indonesia






Oil and gas industry exploration activities produce produced water with a total

of up to millions of barrels per day. Produced water from oil fields has different

chemical compositions depending on geographic location, formation depth, oil

production methods, and age of oil production wells. Currently produced water is still

considered as industrial waste water containing heavy metals which are harmful to

humans and the environment, and require special treatment to be able to dispose of it

into the environment. To determine heavy metals content in oilfield produced water,

laboratory tests were performed for produced water from the Minas Area, Siak Regency,

Riau Province. Laboratory testing parameters include arsen, barium, boron, cadmium,

cobalt, chromium hexavalent, iron, copper, lead, manganese, selenium, mercury, and

zinc using instrument inductively couple plasma (ICP-OES) and LUMEX RA-915. Result

from laboratory tests show heavy metals content in produced water ranges between

<0,01 – 1,0 mg/L and only heavy metal of barium and boron which have a concentration

of more than 1.0 mg/l. Without advance treatment especially to eliminate heavy metals

content, produced water in Minas Area is harmful as source of drinking water and other

daily activity including for fisheri and crop plantation.


SILICA NANOPARTICLES IN SLOW RELEASE SUPPLEMENT PREPARATION AND

CHARACTERIZATION

Kun Sri Budiasih, Zamhariroh Marsha, Asmi Aris, Rama Chrismara

Department of Chemistry, Yogyakarta State University


Silica nanoparticles was applied as supporting material in the preparation of

slow release supplement. The silica was synthesized by bamboo leaves ash by

calcination method in 800oC for an hour. The product was characterized by Scanning

Electron Microscope (SEM) to determine the morphology of the particles, and X-Ray

Diffraction (XRD) to provide the crystal pattern and the particle size by Shcherer

formula. The supplement was slow release Vitamin C which prepared by mixing of three

component : generic ascorbic acid, magnesium stearate, and nanosilica in certain

composition. Some assessments were carried out to determine the tablet”s

characteristic : the size, homogenity, and hardness. In vitro assessment was represented

by dissolution test in simulation solutions of stomach by 0,1M HCl and the intestine by

citric acid, respectively. The result showed that the dissolution of the samples were

slower than control tablets. This indicated that the addition of silica nanoparticles

affected the characteristic of slow release drug/supplement.



Organic Chemistry


ANTIBACTERIAL ACTIVITIES OF NEW AND KNOWN COMPOUNDS PREPARED

FROM EUGENOL

I.M. Sudarma 1*, M.G. Darmayanti 1, and Sarkono2

1Department of Chemistry, University of Mataram, Mataram 83125, Indonesia

2Department of Biology, University of Mataram, Mataram 83125, Indonesia

*E-mail : [email protected]

Eugenol (4-allyl-2-methoxyphenol) (A), the major secondary metabolite

extracted and isolated from clove (Syzygium aromaticum), has been normally used for

anesthetic in dentistry. In an attempt to increase biological activities of this easily access

natural compound, some new and known compounds were synthesized. Eugenol was

extracted and purified from cloves oil and further, its new and known derivatives (B-J)

were prepared through varies reactions and screened by in vitro model of antibacterial

activities using pathogen bacteria: Eschericia coli, Bacillus cereus, and Staphylococcus

aureus. Nearly all compounds showed antibacterial activities. The obtained results

demonstrate that eugenol (A) was still significantly more active than its analogues (B-J),

with inhibition (14-18) mm, suggesting that this chemical transformation failed to

increase antibacterial activities of eugenol. The presence of nitro (B), cyclic sulfonic

ester (C), N-dimethyl (D), quinoline (E), amino (F), isocyanate (G, H), amide and ester

(I,J) has no ability to enhance the antibacterial activities of eugenol.


QUALITY TEST OF CLOVE OIL-SOAP BASED ON INDONESIAN NATIONAL

STANDARD (SNI) AND ITS ACTIVITY TEST AS ANTIBACTERIAL AGAINST

Escherichia Coli

Tuti Asaroh1, Sri Handayani1, Susila Kristianingrum1, Anna Rakhmawati2

1Department of Chemistry Education, Yogyakarta State University, Yogyakarta 2Department of Biology Education, Yogyakarta State University, Yogyakarta


The quality test of solid bath-soap made from clove oil as an additive and

antibacterial activity test against Escherichia coli bacteria has been done. Escherichia coli

is one of the main species of gram negative bacteria that can cause food poisoning and




serious infections. The purpose of this research were determined the effect of clove oil

on quality and antibacterial activity of bath-soap. The research stages include soap

making, soap quality analysis, and antibacterial activity test. Solid soap making by

saponification reaction mixture of vegetable oils and NaOH with clove oil as additive.

The characteristics of solid soap with active ingredient of clove oil are 1.067% moisture

content, 92% total fatty matter, 0.8% ethanol insoluble material, 0.0053% free alkali

content, 1.17% percentage chloride, and 0.0037% unsaturated fat. The result of

antibacterial test showed that solid soap with active ingredient of clove oil could inhibit

the growth of Escherichia coli. The highest inhibition zone is 22.18 mm on 10% (b/v)

concentration at 12 hours incubation.


FORMULATION AND TESTING OF ANTIBACTERIAL ACTIVITY OF TRANSPARENT

SOLID SOAP EXTRACTS OF ETHANOL FRUIT LERAK ( Sapindus rarak ) AGAINST

THE GROWTH OF Staphylococusaureus AND Escherichia coli BACTERIA

Oktanio Sigit Prawoko, Fakhrizal Naufal, Anita Rahmawati, Nurfina Aznam

Department of Chemistry, Faculty of Mathematics and Natural Sciences

Yogyakarta State University


The transparent solid soap is one of the innovations of the solid soap, the

superiority of transparent solid soap compared to the solid soap is generally having a

finer foam. The purpose of this research is to make a transparent solid soap

formulation, to find the right concentration of extract of lerak fruit (Sapindus rarak) in

making transparent solid soap and to know the effect of addition of lerak extract on

transparent soap characteristics. The content of the main compounds in antibiotic lerak

is saponins. The extraction was done by maceration using 95% ethanol solvent. The

treatment of the study was the addition of A = 0% (b / b), B = 1% (b / b), C = 2.5% (w /

w), D = 5% (w / w) E = 10% (w / w), F = 15% (w / w), G = 20% and H = 25%.

Transparent solid soap parameters observed include physical properties, chemical

properties and antibacterial activity against the growth of Staphylococcus aureus and

Escherichia coli bacteria. The transparent solid soap formula with C treatment addition

of 2.5% (b / b) lerak fruit extract is the best product of soap quality analysis. The result

of soap parameter analysis at treatment C was pH value 11,8, moisture content 23,91%,

free fatty acid 2,48%, and antibacterial activity on growth of Staphylococcus aureus

bacteria with 15,86 mm inhibition diameter while in Escherichia bacteria coli diameter

of the inhibitory power of 18.27 mm. Lerak extracts added to soap with C treatment can

be categorized as having strong antibacterial activity against the growth of

Staphylococcus aureus and Escherichia coli bacteria.




SYNTHESIS OF METHYL CITRONELLATE THROUGH FISCHER ESTERIFICATION

REACTION BETWEEN METHANOL AND CITRONELLIC ACID FROM OXIDATION

PRODUCT OF CITRONELLAL

1)Joko Wahyono, 2)Cornelia Budimarwanti

Department of Chemistry, Yogyakarta State University, Indonesia 1)[email protected] ; 2)[email protected]

The purpose of this research was to synthesis methyl citronellate through

Fischer esterification reaction between methanol and citronellic acid from oxidation

product of citronellal and characterize the methyl citronellate of esterification product

by TLC method, IR spectroscopy, and GC-MS. This research was started by oxidizing

citronellal to citronellic acid using silver oxide (Ag2O) oxidator obtained from reaction

between silver nitrate (AgNO3) with sodium hydoxide (NaOH) and oxidation reaction at

temperature of 55-60oC for 35 minutes. Then, the oxidation product of citronellal was

reacted with methanol through Fischer esterification reaction using concentrated

sulfuric acid (H2SO4) catalyst at 46oC for 2 hours. The products of citronellal oxidation

and esterification were identified using TLC, IR spectrophotometer, and GC-MS. The

result of this research showed that the Fischer esterification reaction between methanol

with citronellic acid from oxidation product of citronellal was produce methyl

citronellate in the form of brownish yellow liquid and smelling fragrant. The result of

methyl citronellate from esterification product characterization by using TLC method,

IR spectroscopy, and GC-MS showed that the methyl citronellate has a purity of 17 %

and a yield of 13.76 %.


ONE STEP SYNTHETIC METHOD OF p-TERT.BUTYLCALIX[4]ARENE DERIVATIVE

VIA DIRECT BENZOYLATION: REGIOSELECTIVE

Busroni1,*), , Santosa, S.J .2, Siswanta,D.2, Jumina2

1Departement of Chemistry, Faculty of Matematics and Natural Sciences,

University of Jember, Indonesia,

*)Corresponding author: E-mail: [email protected]

The synthesis of 5, 11,17,23-tetra(t-butyl)-25-monohydroxy-26,27,28-

tribenzoyloxycalix[4]arene (derivative 2) were synthesized by benzoylation reaction

5,11,17,23-tetra(t-butyl)-25,26,27,28-tetrahydroxycalix[4]arene (TBCA) and benzoyl

chloride and refluxing at room temperature. Product of the synthesized were carried

out by means of FTIR and 1H-NMR spectroscopy. The results of 5,11,17,23-tetra(t-

butyl)-25-monohydroxy-26,27,28-tribenzoyloxycalix[4]arena (TBMTCA) synthesized

was light yellow crystallin having m.p 306-3090C.




Physical Chemistry


APPLICATION OF NANOPARTICLE TO DEVELOP ANTIBACTERIAL COMPOSITES

FROM SWEET POTATO WASTEWATER

Eli Rohaeti1*, Endang W. Laksono2, and Anna Rakhmawati3

1, 2Department of Chemistry Education, Faculty of Mathematics and Natural Sciences,

Yogyakarta State of University, Jl. Colombo No. 1 Depok Sleman DIY 55281 INDONESIA 3Department of Biology Education, Faculty of Mathematics and Natural Sciences,

Yogyakarta State of University

Tel : + 6282220953934, Fax :+ 62274548203 *Corresponding author: [email protected]

The work has focused on the antibacterial composites based sweet potato

wastewater by adding a glycerol, chitosan, and nanparticle of silver. Physical and

mechanical properties, and also activity against Staphylococcus aureus ATCC 25923 and

Escherichia coli ATCC 25922 of cellulose composite have been performed. Silver

nanoparticles were produced from silver nitrate solution and tri-sodium citrate. The

cellulose was prepared from sweet potato wastewater by Acetobacter xylinum for seven

days. The cellulose was impregnated with chitosan and glycerol by the immersion

method in a chitosan solution and a glycerol solution. Silver nanoparticles were loaded

on the cellulose and its composite. The cellulose, the composite of cellulose and glycerol,

and the composite of cellulose, glycerol, and chitosan which are deposited silver

nanoparticles show inhibition effect on the growth of Staphylococcus aureus ATCC

25923 and Escherichia coli ATCC 25922. The composite of cellulose and silver

nanoparticles has the highest strength at break, modulus Young, and antimicrobial

activity against Staphylococcus aureus ATCC 25923. The composite of cellulose,

glycerol, and nanoparticle has the highest elongation at break and antimicrobial activity

against E. coli ATCC 25922.




A PLAIN DESIGN OF ELECTROLYSIS APPARATUS TO REDUCE AMONIA CONTENT IN

EFFLUENT FROM TOFU INDUSTRY

Muflihah1, Sulistyo Prabowo2,*

1Chemistry Education, Faculty of Teacher Training & Education, Universitas Mulawarman,

Samarinda 2Agricultural Products Technology Department, Faculty of Agriculture, Universitas

Mulawarman, Samarinda

*corresponding author: [email protected]

One of the environmental problems the tofu industries encounter is the presence

of an unpleasant odor due to the production of ammonia (NH3) gas from wastewater

they produce. Several previous studies have proven that electrolysis methods can

breakdown this harmful gas into more environmentally friendly compounds. As the

results of literature reviews and some comprehensive research, this paper comes up

with a plain design apparatus useful to reduce ammonia content in wastewater using

electrolysis method.


NEW GENERATION BIOFUEL FROM POLYPROPYLENE PLASTIC WASTE WITH CO-

REACTANT WASTE COOKING OIL AND ITS CHARACTERISTIC PERFORMANCE

Hendro Juwono*,Krisna Adi Nugroho, Riza Alfian, Yatim Lailun Ni’mah,

Djarot Sugiarso and Harmami

Chemistry Department, Faculty of SciencesInstitut Teknologi Sepuluh Nopember (ITS)

Jl. Arief Rahman Hakim, Surabaya 60111 Indonesia


.

Liquid fuels from polypropylene plastic waste and co-reactants biodiesel from

Waste Cooking Oil have been successfully performed by catalytic cracking method. The

catalyst used is Al-MCM-41: Ceramics with ratio 7:3. The catalyst was characterized by

XRD, SEM, Pyridine-FTIR, N2-Adsorption-Desorption, and the product of catalytic

cracking were investigated by gas chromatography-mass spectroscopy (GC-MS). The

Liquid fuels obtained was mixed with commercial fuels (Premium RON 88) and methyl

tertiary butyl ether (MTBE) with ratio (10:87.5:2.5). The results showed liquid fuels

have the largest percentage of gasoline (C7-C12) are 93.92 fraction produced. The

performance of liquid fuels is enhanced with the additive MTBE investigated by

generator set engine with gasoline-based fuel. The liquid fuel blends on the CB50

feedstock variation has the highest percentage of thermal efficiency of 27.42%, with a



density value of 722.55 Kg / m3, a flash point of -5.9 ° C, a viscosity of 0.238 cst, and a

heating value of 15,465 , 94 Kcal / Kg. Characteristics of liquid fuel blends (CB)

manufactured in accordance with SNI 06-3506-1994. Addition of the MTBE additive

enhances the performance (percent thermal efficiency) of CB100 mixture by 0.74% to

the variation of TCB100 and 4.66% to Premium RON 88 at maximum loading of 2090

Watt. Characteristic of liquid fuels produced were also suitable with commercial

gasoline standard.


STRUCTURE AND DYNAMICS OF Cd2+ IN LIQUID AMMONIA: INSIGHT FROM AN AB INITIO

QM/MM MD SIMULATIONS

Suwardi1, Ardani Hamman1, Nuraini Agustina1 dan Ria Armunanto2

1Department of Chemistry Education, Faculty of Mathematics and Natural Sciences,

Yogyakarta State University, Yogyakarta, Indonesia 2Austrian-Indonesian Centre for Computational Chemistry Gadjah Mada University,

Yogyakarta, Indonesia


The structure and dynamics of solution Cd(II) in liquid ammonia environment

have been investigated by means of an ab initio QM/MM molecular dynamics (MD)

simulations at the Hartree-Fock level. In this method, the region comprises Cd(II) ion

and ligand in the first solvation shell were investigated by ab initio quantum mechanical

Born-Oppenheimer while the rest of the system are described as classical 2-body and 2-

body + 3-body potential. Structural properties were indicated by some parameters,

namely the coordination number distribution (CND), radial distribution function (RDF),

and angle distribution function (ADF), while the dynamical properties were

characterized by the mean ligand residence time (MRT) and ligand exchange occurence.

The coordination number of 6 was obtained through the classic molecular dynamic

(using two-body + 3-body potential) and QM/MM methods with the modified SBKJC

VDZ ECP basis set for Cd(II) ion and DZP for N and H, in contrast to 10 obtained through

2-body potential simulation. No ligand exchanges were indicated between the first and

second shell. The mean ligand residence time (MRT) in the second solvation shell is

4.419 ps.




STRUCTURE AND DYNAMICS OF Hg2+ IN AQUEOUS SOLUTION : AN AB INITIO QM/MM

MOLECULAR DYNAMICS STUDY

Crys Fajar Partana1 , Suwardi 2, Agus Salim 3

1,2,3 Universitas Negeri Yogyakarta.Jl Colombo no 1 Depok Sleman, Indonesia.


The metabolic process that is in the body of living things, always involves various

solvents, both water and non-water. The human body mostly (more than 80%) consists

of liquid, so that the metabolic processes in the human body involve the interaction

between solvents and solutes in both ionic and compounds. The interaction between

solvents and solutes is known as hydration. While the interaction of dissolved

substances with water is known as hydration. Mercury is a transition metal element

located in group IIB period 6. Metal mercury is a toxic metal, can cause poisoning.

Chronic poisoning by mercury can occur due to shell contact, food, drink and breathing.

Chronic toxicity in the form of disorders of the digestive system and nervous system,

impaired lens of the eye and can cause damage to the fetal brain resulting in disability in

babies born. The hydration of mercury ions is observed by performing molecular

dynamics simulations of molecular mechanics. The base set used is DEF2-ECP for Hg

atoms, while for water molecules used dunning DZP base collection. Simulation is done

using potential partners and potential 3 bodies. The simulation is done by mixing 1 Hg2+

ion mixed with 499 H2O molecules. The simulation results in the form of trajectory data

are further processed to determine the structure and dynamics. Based on RDF analysis

shows that the average Hg and O (water) atoms are 2.22 A. Based on CND analysis, it is

known that the coordination numbers of hydration of Hg in water are as much as 6

molecules of water. Thus it is known that the hydration of Hg ions in water forms a

distorted octahedral molecule structure. Ligand (water) residence time in Hg based on

molecular dynamics analysis shows that hydration of Hg with water is stable.


KINETICS AND TERMODYNAMIC STUDY OF COPPER (II) ADSORPTION ON TO ACTIVATED

CARBON PREPARED FROM ZALLACA PEEL

Dewi Yuanita Lestari1, a), Endang Widjajanti2)

1,2 Chemistry Department Yogyakarta State University

a)Corresponding author: [email protected]

The adsorption of copper (II) onto activated carbons from Zallaca peel was

investigated. The effect of initial copper concentration, contact time, and temperature




were studied. Batch adsorption technique was carried out. The adsorption equilibrium

was reached after 60 minutes contact time. The adsorption data was fitted well by the

Langmuir isotherm model.The Langergren equation was used to predict the adsorption

kinetics. The adsorption process followed a second order kinetics model. The

Thermodynamic parameters were evaluated (∆H= -41,681 kJ/mol; ∆S= -0,082 kJ/mol;

∆G<0). These values indicated that the adsorption was exothermic and spontaneous in

nature. The small absolute value for ∆G indicated that physisorption was the main

mechanism controlling the adsorption process.


PRE-TREATMENT GLASS SUBSTRATES AND POST TREATMENT OF THE SURFACE

BY HEATED AS WETTABILITY OF MONO AND MULTILAYER CHITOSAN FILM

Eka Rahmawati

STKIP Bima, Indonesia

In this approach, chitosan thin films have been prepared using mono and

multilayer dip coating method. The glass substrates was heated 100 0C as a pre-

treatment and the fabricated thin film were post heated in various temperature: 100 0C,

210 0C, 220 0C and the effect of pre and post heat treatment on their wetting, structural

and morphological properties has been investigated. Scanning electron microscopy

(SEM and contact angle measurement have been applied for the characterization and

study of thin film surfaces. The results of SEM exhibit the aggregation and formation of

chitosan films on the surface of substrate changed through applying heat pre substrates

and increasing of heat post temperature. Wettability

studies showed that the contact angle of prepared thin films was influenced by various

parameters such as heat pre-treatment on glass substrates, variation of heat post

treatment , surface morphology.


SPLITTING OF WATER MOLECULES (H2O) IN Dioscorea esculenta FLOUR MEDIA

WITH STAINLESS STEEL ELECTRODE

Isana Supiah Yosephine Louise, Sulistyani

Department of Chemistry, Yogyakarta State University

e-mail : [email protected]

This study aims to determine the effect of adding lesser yam flour and temperature to

the production of hydrogen gas with stainless steel electrode, determining the efficiency



of the electrolysis process (product efficiency and energy efficiency) and determining

the optimum conditions of hydrogen gas production. The method used electrolysis with

cyclic voltammetry with a sweep rate of 50 mV/ s. The electrolyte solution using

NaHCO3 with a concentration of 5 grams in 1 liter of aquabidest and the addition of

lesser yam flour with variations of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 grams at temperature

variation 250C and 460C . The results showed the addition of lesser yam flour and

increased the temperature increasing the efficiency of electrolysis. The optimum

condition of hydrogen gas production is at temperature 250C and addition of 1 gram of

lesser yam flour that is at efficiency of product 125% and energy efficiency 0,002 volt.


SYNTHESIS AND CHARACTERIZATION EDIBLE FILM BASED ON BACTERIAL

CELLULOSE WITH ADDITION CINNAMON OIL

Marfuatun*, Dwi Ayu Stephanie

Chemistry Education Department, Faculty of Mathematics and Natural Sciences

Yogyakarta State University, Yogyakarta, Indonesia

*e-mail : [email protected]

This research aimed to the determine effect of PVA on mechanical properties of

edible film methyl cellulose (MC) synthesized from bacterial cellulose and the effect of

adding cinnamon oil on character of edible film. Subject of the research was edible film

MC which was synthesized from nata de coco, while the object were mechanical

properties and water vapor absorption. PVA was added were 5%, 10%, 15%, 20%, 25%

and cinnamon oil was added were 2%, 4%, 6%, 8%, 10%. The mechanical properties

edible film MC was observed by tensile strength tester, whereas water vapor absorption

by gravimetric method. The result showed the optimum mechanical properties of edible

film MC was on addition PVA 15% which was 1,565 MPa. The more cinnamon oil was

added, the mechanical properties of edible film tend to decrease, however the water

vapor absorption tend to increase. Furthermore, there was an antimicrobial activity

showed that no growth of fungi in the film.




Chemistry Education


CASE STUDY USING JIGSAW PUZZLES IN WRITING THE CHEMICAL FORMULA OF

IONIC COMPOUNDS AMONG THE 10TH GRADE STUDENTS

Muhd Ibrahim Muhamad Damanhuri, Leela Devi Palany Kumar

Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Malaysia

e-mail: [email protected], [email protected]

Most of the students are having difficulties in writing the formula of chemical

compounds correctly. Hence, they are unable to write the balanced chemical equation.

Symbols in the chemical formula which are abstract lead the ‘early’ learners into

confusion and misunderstanding. Consequently, they fail to explore the knowledge of

chemistry. Thus, we propose the jigsaw puzzles as the visualizing tool to assist the

students in writing the chemical formula of ionic compounds. The objective of this

research is to test the effect of using jigsaw puzzles towards students’ understanding in

writing the chemical formulas of ionic compounds. This quasi-experimental design

research involves 115 science stream students from two secondary schools in Larut,

Matang and Selama district. Achievement test is used to measure students’

understanding in writing the chemical formula of ionic compounds. A survey is also

conducted on the experimental students’ perception on the activity using

questionnaires. Descriptive statistics (involving mean score and standard deviation)

and inferential statistics (involving t-test) are used to analyse the data, with the

assistance of the Statistical Package for Social Sciences (SPPS) software. The findings

proved that the jigsaw puzzles are effective in assisting students to write the chemical

formula of ionic compounds. Students also have a positive perception towards the

usage of jigsaw puzzles in teaching and learning activity. As conclusion, this jigsaw

puzzle activity should be implemented in teaching and learning to assist the students in

writing the chemical formula of ionic compounds. This study implies that the elements

of game should be infused during the planning of teaching and learning to ensure that

learning is more heuristic.






CHEMISTRY STUDENTS’ IDENTITY EMPOWERMENT THROUGH

ETNOCHEMISTRY IN CULTURALLY RESPONSIVE TRANSFORMATIVE

TEACHING (CRTT)

Yuli Rahmawati1, a), Achmad Ridwan2, Arif Rahman3, Fera Kurniadewi4

1, 2,3,4 Chemistry Education Study Program, Universitas Negeri Jakarta

Rawamangun Muka Street, Jakarta, Indonesia

aCoresponding Author: [email protected]

The paper portrays the second year report of a three-year longitudinal study of

ethnochemistry integration in Culturally Responsive Transformative Teaching (CRTT)

teaching model in secondary schools. The CRTT develop based on Culturally

Responsive Teaching (CRT) as an approach that includes students’ characteristics and

cultural references in all aspects of learning and transformative learning framework. In

this study, the culture and indigenous knowledge have been explored from chemistry

perspectives through ethnochemistry to empower students in understanding their own

cultural identity. The study developed CRTT teaching model in the first year of study

and consists of five phases of self-identification, cultural understanding, collaboration,

critical reflections, and transformative construction. The qualitative methodology

approach has been employed with observation, interviews, and reflective journals as

data collection. The CRTT teaching model was implemented in chemistry classrooms

from two secondary schools. The study involved 68 students of year-10 in the topic of

electrolyte and non-electrolyte solution. The data was analyzed from the basic

principles of cultural identity category. The results showed that the integration of

ethnochemistry in CRTT teaching model has engaged students in empowerment their

cultural identity and nationalism, cultural differences awareness, and learning identity

development. Students found that the learning experiences have helped to develop their

chemistry knowledge from their cultural background. The students are motivated to

learn chemistry in different ways, they also developed the ability to work together,

responsibility, curiosity, social awareness, creativity, empathy communication, and self-

confidence. The teaching model is also relevant to the policy of national curricula of

nationalism in relation to character and culture identity development.




DEVELOPING CRITICAL AND CREATIVE THINKING SKILLS THROUGH STEAM

INTEGRATION IN CHEMISTRY LEARNING

Yuli Rahmawati1, a, Achmad Ridwan2, Tritiyatma Hadinugrahaningsih3, Soeprijanto4

1, 2,3 Chemistry Education Study Program, Universitas Negeri Jakarta

4 Electrical Engineering Vocational Education Study Program, Universitas Negeri Jakarta

Rawamangun Muka street, Jakarta, Indonesia aCoresponding author: [email protected]

This paper describes a second year of two-year of longitudinal study of the

integration of Science, Technology, Engineering, Art, and Mathematics (STEAM) in

chemistry learning in secondary schools in which the importance of critical and creative

thinking skills and STEAM integration were explored. The study involved 76 students of

Year 11 from two secondary schools in Indonesia. The STEAM integration was

implemented in the teaching of acids and bases through a project-based learning model.

The research employed a qualitative approach to explore the integration of STEAM in

chemistry, students’ critical and creative thinking skills development. Data were

collected through observations, interviews, reflective journals, critical and creative

thinking skills rubric. The students had opportunities to develop their own projects by

integrating chemistry concepts and STEAM principles. The results of the study were

analyzed based on the pattern themes found in different data sources. It showed that

students developed creativity and critical thinking skills. The researchers faced

challenges of integrating STEAM within the Indonesia chemistry curriculum,

empowering teachers, engaging students, and managing the teaching, time and

resources. Students appear that the integration of STEAM provided the opportunities

for students in chemistry learning engagement and several areas of thinking skills

development in relation to the current curricula objectives.


ANALYSIST OF STUDENT’S MISCONCEPTION ON ACIDS BASES CONCEPT

Mia Isnaningrum1), Umi Sayidatus Zakiya2), Luthfan Ihtisyamuddin3), Antuni Wiyarsi4)

1, 2, 3, 4Chemistry Education, Faculty of Mathematics and Natural Sciences,

Yogyakarta State University Indonesia


The objective research is to describe the profile of popular high school students

on acid based material in terms of the percentage of misconceptions and concept as the

source of the misconception. Research instrument in the form of test with three tier




diagnostic. Instument consist of acid bases theory, neutralization, acidic properties,

poer bases, and the concept of pH. The preparation of the test has involved 2 validation

material and 20 the number reserved. The percentage of students who had a

misconception on acid alkaline material is 45.93% (Medium Category).


IMPROVING CREATIVITY OF PROSPECTIVE CHEMISTRY TEACHER THROUGH

CHEMOENTREPENEURSHIP ORIENTED INQUIRY MODULE ON COLLOID TOPICS

Citra Ayu Dewi1, Ratna Azizah Mashami2

12Institut Keguruan dan Ilmu Pendidikan (IKIP) Mataram, Jl. Pemuda No. 59A Mataram

83126, INDONESIA.

email: [email protected], [email protected]

Limited resources of teaching materials (i.e., syllabus, presentation slide and

textbook) for basic chemistry often do not contain sufficient part on application of the

concepts. In addition, it is necessary to prepare qualified college graduates to fulfill the

demand of chemistry teachers. Chemistry subject has various applications in everyday

life and has the potential to be developed into an entrepreneur in the field of chemistry

especially on the colloidal system. This study investigates the effect of chemo-

entrepreneurship oriented inquiry module (COIM) on colloid topic to enhance students

creativity in teaching chemistry subject. The work was quasi-experimental, including

pretest-posttest control group design. The used instrument is in the form of a

description test, especially designed to determine the creativity of students. The results

show that the use of COIM was effective as proven by 1) an increase in student

creativity index from 60 to 79, and 2) N-Gain level of attainment was in the range of

0.76 with high category. Overall, it can be concluded that the use of

chemoentrepreneurship oriented inquiry module effectively can enhance.


MEASURING STUDENTS’ CRITICAL THINKING IN ESSAY WRITING: A CASE STUDY

IN HIGHER EDUCATION

Budi Utami1, Sulistyo Saputro2, Ashadi2, Mohammad Masykuri2

1Postgraduate Program of Science Education Sebelas Maret University, Indonesia

Corresponding e-mail: [email protected]

The purpose of this research was to know the critical thinking skills of chemistry

students through the tasks of making papers. Critical thinking skill is an important topic





in education and one of the 21st century learning goals. It can be improved with writing

skill. The metodology of this research is descriptive research. This research was

conducted on chemistry students of semester two in the educational profession subject.

The results of the study noted that students needed to have skills in analyzing and

evaluating informations before making conclusions.


SURVEY ON THE IMPLEMENTATION OF 2013 CURRICULUM PROCESS STANDARD

OF CHEMISTRY SUBJECT LEARNING IN PUBLIC SENIOR HIGH SCHOOLS OF

YOGYAKARTA

Faza Amaliya1 and Isana Supiah Y L2

1,2 Department of Chemistry, Faculty of Mathematics and Natural Sciences, State

Yogyakarta University, Indonesia


This research aims to describe the implementation of process standard of 2013

Curriculum of chemistry subject learning in Yogyakarta Public Senior High School at the

planning and implementation stage of learning by grade XI chemistry teacher. This

research used qualitative descriptive analysis technique. The population was all

chemistry teachers from Public Senior High School of Yogyakarta with a sample of five

chemistry teachers from Yogyakarta used purpossive sampling. The data in this study

was collected through the documentation of Lesson Plan, student questionnaire,

observation, and interview. The data analysis technique was the analysis of Miles &

Hubberman Model. Based on the data analysis, the implementation of 2013 Curriculum

process standard on chemistry subject learning of grade XI in Public Senior High School

of Yogyakarta, the chemistry teachers of grade XI in Public Senior High School have (1)

prepared well the Lesson Plan (RPP) appropriate with 2013 Curriculum. (2)

implemented the learning process includes opening, core, and closing activities well.


INTEGRATING CHEMICAL LITERACY ON ANDROID BASED ASSESSMENT FOR HIGH

SCHOOL STUDENTS’

E. Priyambodo, A. Wiyarsi, A.R.E. Nugraheni, Dina

Department of Chemistry Education, Universitas Negeri Yogyakarta

Email : [email protected]

Chemical literacy is a skill to identify questions, aquire new chemistry knowledge,

explain chemistry phenomena and draw evidence-based conclusions about chemistry-



related issues. In learning of chemical literacy, students must have a specific media in

practicing this ability on a simple way, i.e. smartphone. The most popular smartphones’

operating system in Indonesia is android. This study is promoted a kind of android

based assessment as a media for students’ in learning of chemical literacy. This media

consists of chemical literacy questions for high school students’. In terms of knowing the

students’ ability in chemical literacy, the teacher can used this media as an instrument

to evaluate this skill by connecting the media to the database through WiFi. The data

obtained from the questionnaires, which was fill out by the chemistry teachers and also

the students, about their perception in using this media. Based on the study, the media

was categorized very good media by the chemistry teachers and the students.


THE EFFECT OF SCIENCE TECHNOLOGY SOCIETY MODEL ON SCIENCE LITERACY

AND SCIENCE ATTITUDE OF STUDENTS ON THE SUBJECT OF BUFFER

M G Devi1 and N Aznam2

1 Chemistry Education Department, Postgraduate Program, Universitas Negeri

Yogyakarta 2 Chemistry Education Department, Faculty of Mathematics and Science, Universitas

Negeri Yogyakarta.


Science literacy and science attitudes are two conceptual foundations for

students that has to be increased in both developing and developed countries. This

research aims to identify (1) the effect of science technology society model on science

literacy and science attitude of students on the subject of buffer solution; (2) the effect

of science technology society model on science literacy of students on the subject of

buffer solution; (3) the effect of science technology society model on science attitude of

students on the subject of buffer solution. This research was quasi experimental

research using nonequivalent control group design. The population of this study was

tudents of clas XI IPA SMA Negeri 4 Kota Ternate. The sample was determined by

cluster random sampling technique. The sample of this study was two classes. XI MIA 3

as an experimental class consisted of 34 students which used science technology society

model. XI MIA 4 as a control class consisted of 33 students wihch used direct instruction

model. The results of the study showed that: (1) there was significant effect of science

technology society model on science literacy and science attitude of students on the

subject of buffer solution; (2) there was significant effect of science technology society

model on science literacy of students on the subject of buffer solution; (3) there was

significant effect of science technology society model on science attitude of students on

the subject of buffer solution.




EFFECTIVENESS OF USING VIRTUAL CHEMISTRY LABORATORY INTEGRATED HYBRID

LEARNING TO STUDENTS’ LEARNING ACHIEVEMENT

Renny Wijayanti 1,a), Kristian Handoyo Sugiyarto 2,b), Jaslin Ikhsan 3,c)

1 Department of Chemistry Education, Graduate School, Yogyakarta State University,

Indonesia 2,3 Department of Chemistry Education, Faculty of Mathematics and Natural Science,



This research was conducted to analyze the effect of using virtual chemistry

laboratory integrated hybrid learning toward students’ learning achievement on the

subject of thermochemistry. Thus, the research was set as a quasi-experiment research

using posttest and non-equivalent control group design. By purpossive sampling

technique, the samples from 3 classes composed of 1 public senior high school were

selected. The classes were divided into experiment class (EG) using both virtual

chemistry laboratory integrated hybrid learning and traditional hands-on laboratory,

control class 1 (CG-1) using virtual chemistry laboratory integrated hybrid learning

only, and control class 2 (CG-2) using traditional hands-on laboratory only. The

corresponding data were collected on the basis of a multiple choice test of chemistry

learning achievement. The data were then tested by Anova. The results show that there

is a significantly different in students’ learning achievement among the three classes EG,

CG-1 and CG-2.


THE EFFECT OF PROBLEM-BASED LEARNING MODEL TOWARD STUDENTS’ SELF-

REGULATED LEARNING ON RATE REACTION MATTER

Endang W Laksono,, Eli Rohaeti, Suyanta, Ihda Nur Rahmah

Department of Chemistry Education, Faculty of Mathematics and Natural Science,

Universitas Negeri Yogyakarta, Indonesia

Corresponding author : [email protected]

This research aimed to investigate the effect of PBL model on students' self-

regulated learning on rate reaction. This research was quasi-experimental research

using posttest-only control design. The sample consisted 2 classes, experiment class

used Problem-Based Learning model and control class used Direct Instruction model

with a total sample of 61 students. The data collecting was using observation guide and

questionnaire. The data analysis used the ancova test at the significance level of 5%. The




result of the statistic tests shows that there is a significant self-regulated learning

difference between two students groups (p = 0.036), in which suggested that the

learning process using the PBL model can increase students’ self-regulated learning on

rate reaction.


APPLYING OF PROBLEM BASED-LEARNING MODEL ON LEARNERS’ INTEGRATED

ABILITIES ON ACIDS AND BASES SOLUTION MATTER

Endang. W. Laksono.1), Suyanta. and Novia Fitri Fadhilah

Department of Chemistry Education, Universitas Negeri Yogyakarta

Colombo No.1, Karangmalang, Yogyakarta, 55281, Indonesia

email: [email protected])

The application of proper learning models can encourage learners to learn,

innovate, and develop their knowledge, skills, and attitudes better. One of the learning

models used is problem based-learning (PBL) model because it can be applied to

develop the learners’ integrated ability. The integrated abilities of critical thinking

ability and science process skills. The research was conduct by implementing the

problem-based learning model which was presenting problem by an investigation. This

model was employed to find out that there is different of the critical thinking ability and

science process skill of learners on acid and base solutions matter which used PBL model

and direct instruction model. Critical thinking skills and science process skills were

measured by an essay test. The data was analyzed by univariate with a significance

value of 0.05. The results showed that there was the different on learner’s integrated

ability which used PBL model from a significance value of 0.012<0.05. The influence

was induced by interaction between learners and teachers as facilitators.


THE COMPUTER-ASSISTED TESTLET ASSESSMENT INSTRUMENT TO MEASURE

STUDENTS’ LEARNING DIFFICULTIES IN CHEMICAL BONDING

E Lutviana1*, S B Rahardjo1, E Susanti1, S Yamtinah1, S Mulyani1, and S Saputro1

1Master Program of Chemistry Education, Universitas Sebelas Maret, Jl. Ir. Sutami No.36A,

Jebres, Surakarta, Jawa Tengah Indonesia

email: [email protected] ac.id

Many students assume that the chemistry subject is difficult. We will make a

Testlet assessment instrument (TAI) as a diagnostic tool that can be used to detect

students’ level of difficulty in learning chemistry. This study aims to analyse the



mailto:[email protected]%20ac.idm



computer-assisted TAI to measure students’ learning difficulties in chemical bond

subject matter for class X students of senior high school in Madiun of East Java

Indonesia. This study used descriptive-quantitative analysis methods and 15 students

from 3 different schools as participants. The computer-assisted TAI consists of 10-

question stems, that’s are stem 1 until stem 10. The result of this study showed that the

most students answered the questions most correctly in stem 3, stem 2, stem 1 and

stem 10 but for stem 4, stem 5, stem 6, stem 7, stem 8 and stem 9 only a few students

can answer correctly. The 10-question stems of chemical bond subject matter cover

sub-topics of electron configuration, type of ionic bond, the tendency of bonding an

element, type of covalent bond, the correct statement of covalent bonds, determine the

number of free electron pairs on the Lewis structure, type of metal bond, molecular

form, the value of the electronegativity of an element and electron domains. Scoring of

the TAI used graded scoring with 4 categories. The implication for applying the

computer-assisted TAI for measuring students’ difficulties in chemical bonding subject

was discussed.


ANALYSIS OF STUDENTS’ SCIENTIFIC LITERACY IN CONTEXTUAL-FLIPPED

CLASSROOM LEARNING ON ACID-BASES TOPIC

Maria Paristiowati1, Tritiyatma H1., Agung Purwanto1, Prita Atria K1

1Department of Chemistry Education, Faculty of Mathematics and Sciences, Universitas

Negeri Jakarta, Jl. Rawamangun Muka, Jakarta 13220, Indonesia


This study aims to determine students scientific literacy skills after learning with

a contextual-flipped classroom model. In Flipped classroom-contextual learning,

students learning the lesson material through contextual videos outside the classroom,

then discussions in class and lab work. This study used a qualitative method with 36

students in class XI at senior high school in Jakarta. Data collection were carried out

through scientific literacy tests, observation, interviews, and reflective journal of

students. The students’ scientific literacy skills in this study refers to the scientific

literacy of PISA. The results showed that 16.7% students had achieved scientific literacy

at level 6; 38.9% at level 5; 11.1% at level 4; 27.8% at level 3; 5.6% at level 2 and 1. In

addition, the results of the study show that aspects of scientific literacy have also been

mastered by students. Mastery of scientific literacy aspects, including: aspects of the

scientific context is 83.92%, aspects of science knowledge is 84.36%, and aspects of

scientific competence is 84.06%. Thus, it can be concluded that acid-bases learning with

a contextual-flipped classroom model can foster students scientific literacy skills.





ENJOYFUL LEARNING IN CHEMICAL BONDING CONCEPT USING AUGMENTED REALITY

(AR) TECHNOLOGY

D Ernawati and J Ikhsan

Department of Chemistry Education, Yogyakarta State University, Jl. Colombo No. 1,

Caturtunggal, Depok Sleman, Yogyakarta 55281, Indonesia


Augmented reality technology provided a great advantage in chemistry learning

because it can visualize abstract, symbolic and microscopic concepts such as in the

chemical bonding concept. This research developed 3D applications on chemical

bonding concept as supplement material for students. The development models of 5

steps (Analysis, Design, Development, Inplementation, and Evaluation) were the

adaptation of the ADDIE model. The study design was a non-equivalent Control Group

Design and used purposive sampling technique. The sample consisted of 41 students,

with 12 students as a control class and 20 students as experimental class. The students

were in grade 10 of Senior High School. The Mann-Whitney and Wilcoxon at 0.05%

significance level was used to determine the effect of AR used on motivation and

learning outcomes of students. The analysis of the data showed that the “Chemsbond”

aplication was in the criteria of very good, so it can be used as chemistry learning media.

Another result showed that there were differences between learning motivation of

experimental class and control class when applied by learning media and there is no

influence of using learning media between experimental class and control class on

student learning outcomes.


ANALYZING SCIENTIFIC APPROACH AND PROBLEM SOLVING IN SALT HYDROLYSIS TOPIC

Hilda Nita Pramesthi a) Ashadi Ashadi and Sulistyo Saputro

Universitas Sebelas Maret, Surakarta, Indonesia a) Corresponding author: [email protected]

This study aimed to analyze the suitability of materials teaching with aspects

found in the scientific approach, and the steps of problem solving model. The sample of

this research was three book materials of class XI chemistry. It was used by some high

schools in Klaten Regency. The analysis was conducted on three materials teaching that

were coded X, Y, and Z. The result of the research showed that the compatibility toward

the scientific approach of sample X was 50%, sample Y was 65% and sample Z was 20%.

Conformity to problem solving model step sample X was 35%, sample Y was 50%, and





sample Z was 10%. These chemistry book materials which used in the high school

should be added according to aspects of the scientific approach and problem solving

steps that have not been listed.


ANALYSIS OF NEEDS ON COMPUTER-BASED TESTLET TEST MODELS

e-mail corespondence : [email protected]

The purpose of this study was to: (1) find out the form of tests conducted by the

teacher, (2) explore the teacher's needs for computer-based tests. This study was

included in a qualitative descriptive study. The method used in this study is a survey

using 6 teachers from 3 public schools in Boyolali with high, medium and low level

categories as respondents. Data collected through questionnaires. Data analysis

techniques used descriptive statistical analysis. The results of this study indicate that:

(1) the tests applied by schools in Boyolali sub-district majority still use paper-based

tests, 65.63% of students choose tests using computers, 31.77% of students choose to

use paper-based tests and 2.60% of students do not give an answer. From the form of

multiple choice tests and essays it was found that 29.17% of students chose the essay

form test, 53.12% of students chose multiple choice and 17.71% of students chose the

multiple choice test and essay test (2) Teacher's requirements for computer based tests

namely: First, teachers need insight into making computer-based tests that are easy to

compile and implement in learning. Second, there needs to be an interest generation to

carry out computer-based tests. Third, test questions can be arranged through a simple

and easy to operate device.


AN ANALYSIS IN DEVELOPING VIRTUAL LABORATORY ACCORDING TO THE CHEMISTRY

TEACHERS

Febrian Solikhin1 a), Jaslin Ikhsan2, and Kristian Handoyo Sugiyarto3

1Student of Chemistry Education Master Programme, Graduate School, Yogyakarta State

University 2, 3Department of Chemistry Education, Faculty of Mathematics and Natural Science,

Yogyakarta State University a)Corresponding author: [email protected]



Technology-based learning was always done to face up the growth of technology

in the modern era. It attracted students to understand the subject matter. The

development of practicum media could facilitate students in practicum without the real

tools and materials. However, need analysis were required to find out what it needed in

the chemistry class according to the chemistry teachers. This research is descriptive

research. This need analysis used an open-ended questionnaire as instrument that

contain questions about the development need of a virtual chemistry laboratory.

Respondents from this research were chemistry teachers who have been teaching

chemistry for years. Data analysis used Microsoft Excel program. The results of this

study obtained 91.89% of 37 respondents stated to need an integrated virtual chemistry

laboratory in hybrid learning. While practicum-based matters that were perceived to

require a virtual chemistry laboratory were chemical equilibrium, electrochemistry and

reaction rates.


VIRTUAL CHEMISTRY LABORATORY (VIRTUAL CHEM-LAB): POTENTIAL EXPERIMENTAL

MEDIA IN HYBRID LEARNING

M K Nais1, a), K H Sugiyarto2, J Ikhsan2

1Study Program of Chemistry Education, Graduate School, Yogyakarta State University,

Indonesia 2Department of Chemistry Education, Faculty of Mathematics and Sciences, Yogyakarta

State University, Indonesia a)Corresponding author: [email protected]

A laboratory has a very important role in learning chemistry. It facilitates the

experimental activity which supports the students’ understanding. The development of

information and communication technology has provided an innovation known as the

virtual laboratory. This study aims to reveal the quality of virtual chemistry laboratory

(virtual chem-lab) integrated into hybrid learning on chemical bonding. This research

was a research and development study. The development procedure used in this study

consists of four stages: analyzing, product planning, product developing, and product

assessing which adapted from the ADDIE development model. The initial product of the

virtual chem-lab was validated theoretically by material expert and media expert.

Product assessment was carried out by 27 chemistry teachers includes content, learning

quality, and technical quality aspect. The result of product assessment was analyzed

descriptively quantitative to reveal the quality of the product. The findings of this study

revealed that the quality of the virtual chem-lab integrating hybrid learning was is in a

good category. Thus, the virtual chem-lab is potential for further use.




IMPLEMENTING THE SCIENTIFIC-BASED JIGSAW MODEL ON SELF-EFFICACY AND

COGNITIVE ACHIEVEMENT

Nurlaidy M. Syawal1* & Amanatie1,2

1Department of Chemistry Education, Master Program, Graduate School, Yogyakarta State

University, Indonesia 2Department of Chemistry Education, Faculty of Mathematics and Natural Sciences,



This study aims to examine statistically the significance of (1) the effect of the

implementation of scientific-based jigsaw model on self-efficacy and cognitive learning

outcomes (2) the effect of the implementation of scientific-based jigsaw model on self-

efficacy (3) the effect of the implementation of jigsaw models on cognitive achievement.

The type of the research used in this study was a quasi-experiment. This research was

conducted to 120 students in SMA Negeri 10 Yogyakarta in X grade. Determination of

experimental and control classes was done by using a random sampling technique. Data

collection of this study was conducted with several techniques, namely: interview,

observation, questionnaire, and test. The instruments used in this study were interview

guideline, self-efficacy observation sheet, self-efficacy questionnaire, cognitive test

(post-test). Data analysis techniques used in this study were multivariate (Manova) data

analysis with SPSS. The results showed that: (1) there is the effect of the

implementation of scientific-based jigsaw model on self-efficacy and cognitive

achievement on the oxidation-reduction reaction material, (2) there is the effect of the

implementation of scientific-based jigsaw model on self-efficacy of students on the

material oxidation reduction reaction (3) there is an effect of the implementation of a

scientific-based jigsaw model on the cognitive achievement of students in the oxidation

reduction reaction.


CHEMISTRY ENRICHMENT IN TOURISM VOCATIONAL SCHOOL: THE

DEVELOPMENT AND VALIDATION OF FOOD ADDITIVES MODULE

Antuni Wiyarsi, Heru Pratomo, Erfan Priyambodo, Marfuatun

Chemistry Education Department, Faculty of Mathematics and Natural Science,

Universitas Negeri Yogyakarta

Corresponding author: antuni_w @uny.ac.id



This study presented the development and validation of the chemistry module in

food additive topic for vocational students in the tourism field. An exploratory mixed

method was conducted with four steps cover qualitative, development, quantitative and

interpretation. The Food Additives Module (FAM) was developed based on the basic

competence of food processing and extended on chemistry content. To get the content

and face validity, two experts had reviewed the FAM and gave the feedback to revise it.

The analysis of FAM feasibility gained by the response of 7 chemistry teachers on four

aspects includes the worthiness of chemistry concept, concept presentation, linguistics,

and graphically. This study had produced the FAM module based on the contextual

approach. The module had four theme covers sweeteners, preservatives, coloring and

flavoring foods. A group of experts declared that the FAM was worthy as the chemistry

enrichment content for vocational students of tourism field. The teacher gave a good

response to the FAM quality. This study suggests that the FAM will be a useful tool for

teachers to improve the chemical literacy of students in vocational tourism school.


APPLYING SCIENCE TECHNOLOGY AND SOCIETY APPROACH TOWARDS PSYCHOMOTOR

SKILLS OF HIGH SCHOOL STUDENTS IN ACID AND BASE

Eti Sukriani 1*, and Sri Atun1,2

1Department of Chemistry Education, Master Program, Graduate School, Yogyakarta State

University, Indonesia 2Department of Chemistry Education, Faculty of Mathematics and Natural Sciences,


Email : *[email protected], [email protected].

This study aims to determine the difference in the approach of Science

Technology Society (STS) on the topic of acid base to the psychomotor skills of high

school students. This was a qualitative non-test experimental research whose

instruments consisted of questionnaires and observation sheets. A number of 65

students in XI grade was divided into a control class and an experimental class. For the

analysis of students' responses to learning used the likert scale score that was

converted to five criteria, while for the observation sheet analysis is with the help of

Microsoft Excel 2010 program. The results showed that the students' responses to

learning were in the good category with a mean score of 69.45. From the analysis on the

observation sheet showed that the learning process using STS which was conducting

experiments or practicum was more effective and interesting for students. In the

experimental class at meetings 1 and 2, almost all aspects had higher values than the

control class. The highest aspect value in the experimental class was found in checking



the equipment (0,88). The lowest average was found in discussing the observations in

groups (0.51).


INFLUENCE OF VIRTUAL CHEMISTRY LABORATORY UTILIZATION (VCL) TOWARD

COGNITIVE LEARNING ACHIEVEMENT

Z Latifah1,a, J Ikhsan2,b and K H Sugiyarto3,c

1 Department of Chemistry Education, Graduate School, Yogyakarta State University,

Indonesia 55281 2,3 Department of Chemistry Education, Faculty of Mathematics and Natural Sciences,

Yogyakarta State University, Indonesia 55281 a Corresponding author: [email protected]

Virtual Chemistry Laboratory (VCL) is a chemical laboratory that contains

practicum activities mediated by a computer or smartphone. VCL is equipped with

multimedia-based technology features such as images, animated videos, two- or three-

dimensional objects (2D or 3D), e-books, and Material Safety Data Sheets (MSDS).

Presentation of multimedia in VCL Speaking will result in improved quality of

understanding of students. The combination of virtual and conventional laboratories

has also been proven and proven positive. In this study, the research subjects were

divided into three independent groups, namely the control group (practicum activities

in conventional laboratories), experimental group one (practicum activities at VCL) and

experimental group two (practicum activities in conventional laboratories and VCL).

There is no division into three groups that can be used to find out the results of the

practicum to learn cognitive learning for students. Cognitive learning achievement data

about multiple choice answer tests. Data were analyzed using ANOVA. The results of the

analysis of the existence of practical forms of cognitive learning achievement.


THE ATTITUDE OF HIGH SCHOOL CHEMISTRY TEACHER TOWARDS THE DEVELOPMENT

OF CHEMISTRY TEACHERS FOR INCLUSION CLASSROOM PREPARATION PROGRAM

Sukisman Purtadi*1), Antuni Wiyarsi*), Anggiyani Ratnaningtyas Eka Nugraheni*)

*) Department of Chemistry Education, Universitas Negeri Yogyakarta

1) [email protected]





This article discusses the attitude of chemistry teachers towards the

development of chemistry teachers for inclusion classroom preparation program.

Inclusion program at the high school level are mandates that must be implemented to

provide equal educational opportunities for all humans being. However, high school

chemistry teacher candidates have not been prepared to teach chemistry in the

inclusion classroom. The study was conducted as exploratory research, that is,

preliminary research to dig deeper at existing problems to find solutions to be

implemented and designed later. In line with the goal, the research was conducted as a

survey technique for 65 high school chemistry teachers in Daerah Istimewa Yogyakarta

and Jawa Tengah Provinces who were selected by simple random sampling. The survey

was conducted using a questionnaire consisting of 14 questions divided into three

sections, namely cognition, affection, and behavior. The results show that the high

school chemistry teacher's attitude towards the development of the preparation

program for chemistry inclusion teachers is positive with an average questionnaire

score of 97.35


DEVELOPMENT OF ATOMIC STRUCTURE LEARNING MEDIA WITH 3 DIMENSION

ILUSTRATION (3D) BASED ON ANDROID WITH AUGMENTED REALITY

TECHNOLOGY FOR SMA/MA

Ika Putri Utami1*, Jaslin Ikhsan1

1 Department of Chemistry Education, Faculty of Mathematics and Sciences,

Universitas Negeri Yogyakarta, Colombo Street No.1,

Karangmalang, Yogyakarta 55281, Indonesia


This research was a developmental research of 3D, will the objectives of (1) see

development of Augmented Reality Technology chemistry learning media of 3D in

Android on atomic structure ,(2) Determine the quality of Augmented Reality

Technology chemistry learning media in SMA/MA in Android on the atomic structure

3D. This development was by ADDIE model (Analysis, Design, Development,

Implementation, and Evaluation) development model. The data that obtained on this

research was quality data of the product that had been developed. The transformation

of the result data from the qualitative value became quantitative based on the Likert

scale, then made a data tabulation of scores that had been obtained and analyzed based

on ideal assesment category criteria. The result of this development was element

periodic system card with 3 Dimension (3D) illustration with Augmented Reality

tecnology and guidebook to use the chemistry props. Based on reviewer result,

chemistry learning media that was made included very good (VG) quality category.




Based on respons of students as subject of limited trial, all students agreed that learning

media could provide a motivation.


AUTOMOTIVE ENGINEERING CHEMISTRY MODULE : EXPLORING ACID BASE AND

ELECTROCHEMISTRY TOPIC IN VEHICLE CONTEXT

Handari Febiana*, Crys Fajar Partana*, Antuni Wiyarsi*, Bambang Sulistyo**

*Chemistry Education Department, Faculty of Mathematics and Science, Yogyakarta State

University

**Automotive Engineering Department, Faculty of Engineering, Yogyakarta State

University

E-mail : [email protected],

The purposes of this research were to analysis the characteristics of chemistry

module on acid-base and electrochemistry topic based on vehicle context, to analysis

the feasibility of chemistry module according to chemistry learning experts, then to

analysis the response of chemistry teachers and students of Automotive Engineering

Program about this chemistry module. This development research using mixed methods

and exploratory model design. Technique of data analysis begins by converting

qualitative data into quantitative data using Likert scale. Furthermore, the total score

and the average score of each component can be sought from the quantitative data. The

resulting average scores are converted to qualitative feasibility criteria according to the

rating category. The product of the development was a chemistry module on acid-base

and electrochemistry topic based on vehicle context for students in Automotive

Engineering Program considered feasible according chemistry learning expert. This

chemistry module had assessed by 5 chemistry teachers and 10 students of Automotive

Engineering Program in Vocational School. The module assessment by chemistry

teachers showed a very good response. Then, the module assessment by students

showed a good response. Therefore, this module was considered feasible and can be

used as a learning resource for students of Automotive Engineering Program.


CHEMISTRY IN CONTEXT: THE DEVEOPMENT OF HYDROCARBON CHEMISTRY

AND PETROLEUM (HCP) MODULE BASED ON VEHICLE CASE

Febrianto, Antuni Wiyarsi, Crys Fajar Patana, Bambang Sulistyo

Chemistry Education Departement, Universitas Negeri Yogyakarta Email: [email protected]





This study analyzed the characteristic, feasibility, teacher and studens response

of hydrocarbon chemistry and petroleum (HCP) module based vehicle case for

vocational school student on automotive engineering. Exploratory mixed method have

been conducted in this research method. The procedures were using four step, there are

qualitative, development, quantitative, and interpretation. The instrument were using

three questionnaire, one open questionnaire to validation and two close questionnaires

to teacher and student response. HCP module based on vehicle for vocational school

student on automotive engineering was product in this research. The characteristic of

research product is integrating between chemistry and automotive subject based on

basic competence of curriculum and interated by vehicle context in first chapter,

activities, examples, and exercies. HCP module was proper of content aspect by expert

judgement. The teacher response included in very good category and student response

included in very good category. HCP module base on vehicle case is learning sources for

students and it is support of learning chemistry on program automotive engineering

will become success.


STUDENT’S INTEGRATED ABILITY AND ACTIVITY OF ELEVENTH GRADE

STUDENTS LEARNED THROUGH LEARNING CYCLE 7E

Aryati Wibowo

Department of Chemistry Education, Yogyakarta State University, Indonesia

The study investigated the effect of using the 7-E learning cycle strategy in

teaching on the integrated ability and activity of eleventh graders in chemistry. To

achieve this goal, sixty two students were randomly selected then divided into two

groups- the experimental group which was taught by using the 7-E learning cycle, and

the control group which was taught by the ekspository method. Data were collected

using the following four instruments: a number of teaching situations which were

planned by 7-E learning cycle, integrated ability test, activity’s questionnaire and

activity’s observation. To answer the questions, manova was used. The results of the

study revealed that the students who learned using the 7-E learning cycle and the

ekspository method were not differently showed integrated ability and activity toward

chemistry learning at the 0.05 level of significance. The researcher recommends that

more studies should be conducted about the effect of this method on other instructional

variables.




IMPLEMENTATING GUIDED INQUIRY : THE INFLUENCE TOWARDS STUDENTS’

ACTIVITIES AND COMMUNICATION SKILL

L A Lungan1 , E W Laksono2

1Graduate Programme, Universitas Negeri Yogyakarta 2Department of Chemistry education, FMIPA Universitas Negeri Yogyakarta Indonesia

The aim of this research is identify the effectiveness of guided inquiry on

students’ activities and communication skill in chemistry. The samples of this study

were obtained by using cluster random sampling technique. The samples were divided

into two kinds of group named experimental and control group. While the students of

experimental group were taught using guided inquiry and the students of control group

were taught using expository learning. Data of this research were collected by using

questionnaire and observation for student’s activities and communication skill. The data

were analyzed by using multivariate (MANOVA) test whereas the significant level used

was 0,05. The results show that there were significant differences between students

who were taught using guided inquiry and students who were taught using expository.

It is agrees that guided inquiry is significantly more effective than the expository learnin


THE EFFECT OF DISCOVERY LEARNING ON STUDENTS’ INTEGRATED ABILITIES

AND CREATIVITY

D F Syolendra1, E W Laksono2

1Graduate Programme, Universitas Negeri Yogyakarta

2Department of Chemistry Education, FMIPA, Universitas Negeri Yogyakarta, Indonesia

This study aims to investigate the effect of discovery learning model on

integrated abilities (analytical thinking skills and science process skills) and students’

creativity in buffer solution grade XI high school materials. This study was quasi-

experimental research using the post-test only group design. The population was the

students of senior high school in Special Region of Yogyakarta. The sample consisted of

two classes from one of the high schools in Yogyakarta. Experimental class and control

class, each consisting of 32 students, was established using the cluster random sampling

technique. The data were collected using integrated ability test, creativity’s

questionnaire sheet and creativity’s observation sheet. Data were analysed by MANOVA

whereas the significant level used was 0,05. The result show that there were significant

differences between students who were taught using discovery learning and student

who were taught using expository. It is agrees that discovery learning is significantly

more effective that the expository learning which are usually applied by teachers in

class.

Documents

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