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EduChemia: Jurnal Kimia dan Pendidikan

EduChemia
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Published by Universitas Sultan Ageng Tirtayasa

ISSN : 25024778 EISSN : 25024787 DOI : http://dx.doi.org/10.30870/educhemia.v6i2.10412

Core Subject : Science, Education, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology

Focus and Scope Educhemia (Jurnal Kimia dan Pendidikan) is Periodicals published the results of research related to the development of science and technology in the field of Chemistry and Chemistry education as a form of intellectual property Chemistry: Organic chemistry, Inorganic chemistry, Biochemistry, Physical chemistry, Analytical Chemistry, Environmental Chemistry, Material chemistry, Ethnochemistry. Chemistry education: chemistry learning design and model, chemical education curricula, Technology innovation and media/multimedia in chemistry learning, development of evaluation tools, lesson study and classroom action research

Arjuna Subject : Kimia(semua kategori) - Kimia Organik

Articles 155 Documents

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Antibacterial Activity of Brown Macroalgae Lipid (Sargassum duplicatum) to The Methicillin Resistant Staphylococcus aureus (MRSA) And Shigella dysentriae Bacteria Riong Seulina Panjaitan; Ani Rombe Sarungngu’; Lika Lastri Sitorus
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 1 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Methicillin Resistant Staphylococcus aureus (MRSA) is the main cause of nosocomial infections in burn patientsdue to the occurrence of antibiotic resistance. Dysentery or shigellosis is an infection that causes sores (ulcers) in the large intestine in the middle caused by the bacteria Shigella dysentriae. Some studies show that Sargassum duplicatum has antibacterial abilities. This study aimsto determine the antibacterial activity of Sargassum duplicatum seaweed lipid extract to the bacteria Methicillin Resistant Staphylococcus aureus (MRSA) and Shigella dysentriae bacteria. The method used in this study was the Folch method (using sochletation with a solvent ratio of chloroform:methanol (2:1)) to extract lipids from Sargassum duplicatum. Then using the paper disc diffusion method with positive control of tetracycline. From the extraction results obtained, the lipid levels of Sargassum duplicatum, where the chloroform phase was 0.493% (b / b) and the methanol phase was 2.40% (b / b). The results of the lipid antibacterial activity of Sargassum duplicatum at the pure concentration in the methanol phase with an average concentration of 7.07 mm on the Methicillin Resistant Staphylococcus aureus (MRSA) Bacteria while in the Shigella dysentriae bacteria obtained an average of 7.05 mm and the chloroform phase obtained an average diameter of 9.16 mm on Methicillin Resistant Staphylococcus aureus (MRSA) and in Shigella dysentriae Bacteria an average of 3.99 mm while tetracycline antibiotics amounted to 11.67 mm on Methicillin Resistant Staphylococcus aureus (MRSA) and 18.98 mm in Shigella dysentriae bacteria.

Strengthening Pedagogical Content Knowledge of Prospective Chemistry Teacher: Metacognitive Based Preparation Program for Students’ Self-Efficacy Eda Lolo Allo; Anna Permanasari; Wiji Wiji; Sri Redjeki
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 1 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

The self-efficacy of prospective teachers is fostered through a program to prepare prospective teachers. Self-efficacy is one factor that influences personal and professional development in the future to become a professional teacher. The research aimed to investigate the impact of metacognition preparation in designing learning programs on prospective chemistry teachers' self-efficacy. Descriptive qualitative research is used as a method to interpret the data obtained. The subjects of this study were 34 students of the fifth semester of the Chemistry Education Department of the 2019/2020 academic year at one of the LPTKs in the city of Makassar. Data collection was carried out using a self-efficacy questionnaire adapted from the Science Teaching Efficacy Belief Instrument-Pre service (STEBI-B), which includes the dimensions of Personal Science Teaching Efficacy (PSTE) and Science Teaching Outcome Expectancy (STOE). The questionnaire data were analyzed by means of the average class score. The results showed that the metacognition debriefing program in designing learning could increase student self-efficacy as seen from the increase in the average class score at four stages of implementation, namely: 61.5; 66.1; 67.9; and 72.2. The students' average self-efficacy scores on the PSTE dimension were: 33.5; 38.2; 39.0; 41.8. The mean score of student self-efficacy in the STOE dimension was 28.0; 28.0; 28.9; 30.4. Student self-efficacy increased in both dimensions with higher PSTE scores than STOE scores.

Kajian Senyawa Turunan Benzopirazin sebagai Antimalaria Menggunakan Metode HKSA dan MLR Khusna Arif Rakhman; Nur Asbirayani Limatahu; Hasbul Budiman Karim; Muhammad Ikhlas Abdjan
EduChemia (Jurnal Kimia dan Pendidikan) Vol 4, No 2 (2019)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Telah dilakukan optimasi geometri molekul, kajian hubungan kuantitatif aktivitas-struktur (HKSA) dan regresi multilinear (RML) terhadap senyawa turunan benzopirazin dengan substitusi gugus (R7) pendonor elektron seperti: -Br, -COOH, -NH2, -NH3, -OH dan -C5H6. Pemodelan struktur molekul telah dilakukan secara komputasi dengan menggunakan paket program Hyperchem 8.0.10. Hasil optimasi geometri menggunakan metode semi empiris AM1 menghasilkan energi total dari masing-masing senyawa dari senyawa A1-A6. Penentuan hubungan antara deskriptor yang meliputi Log P, Polari, SAG, SAA, EH, EHOMO, ELUMO, ΔEG, MD dan muatan bersih atom dengan aktivitas antimalaria (IC50Eksperimen) menunjukan terdapat korelasi. Deskriptor yang menunjukan terdapat adanya hubungan dengan aktivitas antimalaria (IC50Eksperimen) selanjutnya, ditentukan model persamaan HKSA terbaik dilakukan dengan analisis regresi multilinear menggunakan program SPSS 22. Hasil analisis yang didapatkan untuk model persamaan HKSA terbaik terdapat pada persamaan model 4: Log 1/IC50 = 2.357 - (0.041) EH + (0.297) Polari - (0.024) SAG - (0.043) ELUMO dengan n = 6, R= 0.963, R2= 0.928, SE = 0.08827, PRESS = 0.5971580176.

Front Matter Vol 4 No 2 (Cover, Editorial Board, Preface, Table of Contents) EduChemia EduChemia
EduChemia (Jurnal Kimia dan Pendidikan) Vol 4, No 2 (2019)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Analisis Multipel Representasi Kimia Siswa pada Konsep Laju Reaksi Nanda Cahaya Safitri; Euis Nursaadah; Imas Eva Wijayanti
EduChemia (Jurnal Kimia dan Pendidikan) Vol 4, No 1 (2019)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Pengetahuan tentang teknik pembelajaran yang tepat pada penyampaian konsep kimia tertentu dapat diketahui melalui proses analisis kemampuan multipel representasi kimia siswa. Penelitian ini bertujuan untuk mengetahui kemampuan interkoneksi ketiga level representasi kimia yang dimiliki siswa dalam mendeskripsikan dan menjelaskan konsep laju reaksi. Penelitian ini menggunakan desain penelitian deskripstif dengan melibatkan satu kelompok subjek. Instrumen tes terdiri dari 15 soal two tier multiple choice. Hasil penelitian menunjukkan bahwa sebesar 21.92% siswa sudah mampu mengkoneksikan ketiga level representasi kimia menunjukkan siswa sudah memiliki pemahaman konsep yang utuh. Sebanyak 25.55% siswa cenderung hanya mampu menginterkoneksikan pada dua level representasi menunjukkan siswa sudah mampu menarik kesimpulan namun kesulitan menemukan alasannya. Sebanyak 14.96% siswa cenderung lebih memahami konsep pada level representasi submikroskopik menunjukkan siswa tidak dapat menarik kesimpulan dari alasan yang diketahui dan sebanyak 37.56% siswa belum memahami maupun mengkoneksikan konsep pada tiga level representasi. Berdasarkan kemampuan interkoneksi ketiga level representasi siswa maka dapat diketahui pola interkoneksi representasi kebanyakan siswa diawali dengan representasi makroskopik lalu representasi simbolik dan terakhir representasi submikroskopik. Disarankan: penyampaian pembelajaran untuk beberapa konsep kimia harus meningkatkan pembahasan pada level representasi submikroskopik tanpa melupakan representasi makroskopik dan simbolik, pembelajaran konsep sebaiknya diawali dengan representasi makroskopik, lalu representasi simbolik dan terakhir representasi submikroskopik.

Development of SETS-Based Teaching Materials in Acid-Base Accompanied by Critical Thinking Exercises and Moral Forming Rahmat Rasmawan
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

This study aims to produce SETS-based teaching materials in acid-base concept that can foster students' critical thinking skills and establish their morale. This study is Research and Development (R & D) refers to the Borg and Gall model, which has been modified into five stages; preliminary study, preparation of product draft, validation and revision of product draft, legibility test, and product draft revision. As the instrument, this study was using a questionnaire about resistances and obstacles, observation sheets in learning, interview guidelines, validation sheets of teaching materials draft, and legibility response questionnaires. Data obtained from questionnaires, learning observation sheets, and interview guidelines were analyzed descriptively qualitatively to get the representation of the learning process that has been conducted so far. The validation sheet and legibility response questionnaire were analyzed quantitatively to determine the validity and legibility levels of teaching materials. The results of expert validation show that the developed teaching materials have a direct link between science, the environment, technology and society in solving problems related to daily life and the students as users give positive responses to the developed teaching materials in terms of content, appearance, novelty, problems, direction and work instructions. Thus, teaching materials developed are valid and proper to be used in the learning process

Development of Students Worksheet Chemical Bond Based On Learning Cycle 7E Utari Oktavianti; Asmadi M. Noer; Lenny Anwar S
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 1 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

This development research aims to produce worksheet chemical bonds based on Learning Cycle 7E, to know the validity level of the worksheet according to the validators, to know the practicality level of the worksheet according to the teacher, and to know the attractiveness level of the worksheet according to students. The development model follows the plomp model. Plomp consists of the preliminary investigation phase, the design phase, realization or construction phase, the test phase, evaluation and revision, and the implementation phase. Based on the results of product validation by three validators, the results obtained with the category valid from five aspects, namely the feasibility of the content, Learning Cycle 7E characteristics, language, presentation, and graphics with the percentage of 91.67%, 92.71%, 94.44%, 91.66%, and 88.89%. Teachers 'response as worksheet users based on the Learning Cycle 7E category is very practical with a percentage of 88.15%, and students' responses to worksheet based on the Learning Cycle 7E category are very interesting with a percentage of 89.99%.

Bioaktivitas Ekstrak Makroalga Sargassum sp. dan Gracilaria sp. terhadap Korosi Mikrobial T. Ferrooxidans Isriyanti Affifah; Fida Madayanti Warganegara; Bunbun Bundjali; Rahmat Firman Septiyanto; Irah Namirah; Rifdah Hanifah
EduChemia (Jurnal Kimia dan Pendidikan) Vol 4, No 2 (2019)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Korosi mikrobial merupakan korosi yang disebabkan oleh adanya pertumbuhan mikroba. Korosi jenis ini dapat mempengaruhi dan mempercepat proses terjadinya korosi karena adanya mikroba. Pipa bawah laut merupakan salah satu material yang sering ditumbuhi bakteri penyebab korosi. Korosi akibat aktivitas mikroba dapat menyebabkan kebocoran pipa bawah laut yang dapat mencemari lingkungan dan biota laut lainnya. Mikroba tersebut tumbuh dan menetap pada pipa selama beberapa lama dan menyebabkan perkaratan pipa. Salah satu mikroba yang dapat menyebabkan korosi microbial adalah bakteri aerob yang berperan aktif dalam proses microbial korosi yaitu bakteri Thiobacillus. Bakteri jenis ini mampu menghasilkan kondisi lingkungan asam yang bersifat korosif hasil dari oksidasi sulfur menjadi asam sulfat. Pada penelitian ini ditentukan laju inhibisi korosi dan dosis optimum makroalga yang digunakan untuk mendapatkan hasil inhibisi yang optimal. Ekstrak metanol Gracilaria sp. dan Sargassum sp. mampu menginhibisi pertumbuhan T. ferooxidans pada dosis 300µL dan 400µL dalam 10 ml media. Nilai LC50 ekstrak Sargassum sp. adalah 483 µL sedangkan untuk ekstrak Gracilaria sp. adalah 461 µL dalam 25 ml media.

Activated Carbon from Plantain Stems as NO2ˉ and Mn2+ Adsorbent on Well Water Betsy Felita; Cucun Alep Riyanto; Yohanes Martono
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 1 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Waste contamination in the environment can not be avoided in water, even though water is the main necessity for living things. Contaminants that are too high such as nitrites and manganese will have a negative impact if consumed continuously. In this research, the synthesis of activated carbon from Plantain stems as an adsorbent for nitrite (NO2ˉ) and manganese (Mn2+)contaminants has been carried out. Synthesis of activated carbon from Plantain stem (ACPS) was carried out with a carbon: H3PO4 impregnation ratio of 1:6 (w/w) and heating using a furnace at 600 oC for an hour. Characterization of ACPS using an Infrared Spectrophotometer showed the presence of functional groups C-H, C = H, C≡C, C-O, P-O, and C-NH3+ or P-H bonds. The results of characterization by XRD showed that the ACPS was amorphous but little crystalline. In the adsorption study, the adsorption isotherms of ACPS on NO2ˉ and Mn2+ ions followed the Redlich-Peterson isotherm with R2 values of 0.9968 and 0.4753, respectively. The adsorption kinetics of ACPS on NO2ˉ and Mn2+ ions followed the Diffusion Intraparticle model with R2 values of 0.8585 for NO2ˉ ions and Pseudo Second Order with R2 values of 0.9482 for Mn2+ ions. In the study of the adsorption efficiency of NO2ˉ and Mn2+ ions using ACPS on well water in the Guyangan Jepara villages, it was found that the reduction efficiency was 15%, only at NO2ˉ ion levels.

Analisis Keterampilan Proses Sains Pembelajaran Larutan Penyangga Menggunakan Siklus Belajar Hipotesis Deduktif Siska Novita Sari; F.M. Titin Supriyanti; Gebi Dwiyanti
EduChemia (Jurnal Kimia dan Pendidikan) Vol 4, No 1 (2019)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Penelitian ini bertujuan untuk memperoleh gambaran pencapaian Keterampilan Proses Sains dalam pembelajaran larutan penyangga dengan siklus belajar hipotesis deduktif. Metode penelitian yang digunakan adalah deskriptif dengan subyek penelitian sebanyak 40 siswa kelas XI di salah satu SMA Negeri di Kota Bandung yang dikategorikan ke dalam siswa kategori tinggi, sedang, dan rendah. Instrumen penelitian yang digunakan adalah Lembar Kerja Siswa, lembar observasi, dan pedoman wawancara. Hasil penelitian menunjukkan bahwa secara keseluruhan, siswa dapat mengembangkan 10 indikator KPS yang meliputi keterampilan mengamati, mengklasifikasikan, merencanakan percobaan, mengajukan pertanyaan, mengajukan hipotesis, meramalkan, menggunakan alat dan bahan, menafsirkan pengamatan, menerapkan konsep, berkomunikasi tergolong dalam kategori baik. Berdasarkan KPS setiap kategori kelompok siswa menunjukkan siswa kelompok tinggi dapat mengembangkan 10 indikator KPS dengan pencapaian sangat baik, sedangkan siswa kelompok sedang dan rendah dapat mengembangkan 10 indikator KPS dengan pencapaian baik

Page 8 of 16 | Total Record : 155

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Indah Langitasari

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educhemia@untirta.ac.id

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Department of Chemistry Education - Universitas Sultan Ageng Tirtayasa Address : Jl. Ciwaru Raya No. 25, Sempu, Kota Serang, Banten 42117, Indonesia

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Kab. serang,

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INDONESIA