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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 10 Documents

Search results for , issue "Vol 6, No 1 (2021)" : 10 Documents clear

Dyhydrokaempferol-3-O-Ramnoside from Ethyl Acetate Extract Ki Encok (Plumbago zeynalica L.) Leaves Nani Suryani; Euis Julaeha; Tati Herlina
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 1 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Plumbago zeynalica L. plant belongs to the Plumbaginaceae family, which is spread as a weed in all tropical and sub-tropical countries, and its abundance is very high in Asia and Africa. P. zeynalica L. plants are ethnopharmacologically used as antitumor, antioxidant, antimicrobial, anticancer, wound healed, and anti-inflammatory. This study aims to isolate secondary metabolites from the fraction of P. zeynalica L. leaf extracts with work stages that included isolation and determination of chemical structures by spectroscopy. Based on the results of the separation and purification of the ethyl acetate fraction obtained isolates in the form of a yellow oil suspected as a flavonoid. The chemical structure of the isolates was identified based on UV-Vis spectroscopy data giving maximum absorption at λmax 339.60 nm and 278.80 nm, which are typical for dihydroflavonol. IR spectroscopy analysis of the isolates provided data information on the presence of aliphatic OH, C-H groups, carbonyl groups (C = O), C = C aromatic groups, and ether strain (C-O-C). NMR data showed that the isolate had the molecular formula of C21H22O10, and its molecular weight confirmed by MS spectrometer was obtained m/z 434. Isolates from this ethyl acetate fraction were suspected as dyhydrokaempferol-3-O-ramnoside or engeletin.

Back Matter Vol 6 No 1 (Author Guidelines, Acknowledgment) EduChemia EduChemia
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 1 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Practicality of an Android Based Chemistry Adventure Game as a Chemical Bond Learning Media Valdo Ayona; Rusly Hidayah
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 1 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

The purpose of this study is to test the development of a proper Chemistry Adventure Game as an android-based game media on Chemistry Bond material at MA Negeri 2 Mojokerto. Practicality. Practicality is obtained from students' observation and questionnaire responses. The research method used is a research and development body carried out until practicality of android-based game media for students. Practicality test at X MIPA 1 class MA Negeri 2 Mojokerto. The data obtained from the practicality of the media Chemistry Adventure Game (1) 86,3% students, activity with a very practical category, (2) 87,88% questionnaire responses with a very practical category. Based on the results of the study, it can be concluded that the developed Chemistry Adventure game is suitable for use as a learning media.

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.

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.

Characterization of Phytochemicals and Chemical Compounds of Patat Leaves (Phrynium capitatum) as Wrapping Materials for Pesor Doclang Ahmad Fathoni
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 1 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Doclang is a typical food of Bogor. One of the compositions is “pesor” wrapped in patat leaves. Apart from being a food wrapper, patat leaves are used as traditional medicine. Research on the chemical content of patat leaves is still limited and needs to be further developed. In this study, phytochemical testing and chemical content of the extracts of n-hexane, ethyl acetate, and methanol from patat leaves were carried out. Phytochemical tests include alkaloid tests; steroid and terpenoid testing; flavonoid test; saponin test; phenolic hydroquinone; tannin and polyphenol test. Based on phytochemical test results, the extract of patat leaves was known to contain alkaloids, steroids, triterpenoids, flavonoids, saponins, phenolic hydroquinones, and tannins with different distributions at each level of solvent polarity. The instruments used to identify the chemical content of patat leaf extract were GCMS and LCMS QTOF. Through GCMS analysis on n-hexane extract, 114 compounds were identified with a similarity level of ≥ 80% to the library. Among these compounds, confirmed to be terpenoid and steroid compounds. In the LCMS analysis of ethyl acetate extract obtained 25 compounds and 31 compounds for methanol extract. It is suspected that these compounds come from the alkaloid, steroid, flavonoid, saponin, phenolic hydroquinone, or tannin class.

Implementation of Problem-Solving Model with The Redox Booklet to Enhance Problem-Solving Skills Jeanette Valentine Rut Tewal; Eny Enawaty; Husna Amalya Melati
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 1 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

This study aimed to increase students' problem-solving skills through problem-solving learning with a booklet on the concept of reduction and oxidation reactions. This research used the pre-experimental method with a one-group pretest-postest design which was conducted in SMAN 5 Pontianak. Participants consist of 37 students of tenth-grade (Class IPA 4). The research instrument was used containing two valid and reliable essay questions. Data analyst was done descriptively and statistically, including n-gain and Wilcoxon test. Students' problem-solving skills were measured before and after being given treatment. The research results showed that the N-Gain (0,62) value with medium category of students problem-solving skills. These results were supported with the Wilcoxon test obtaining a significance value of 0,00 (<0,05). It indicated that H0 was rejected dan H1 was accepted. These results indicated the problem-solving learning model with a booklet could improve students' problem-solving skills on reduction and oxidation reaction material.

Amino Acids Composition of Non-Structural Protein in SARS-CoV-2 the Cause of COVID-19 Pandemic Suprianto Suprianto; Ni Kadek Dewi Permatasari; Gusti Ayu Kadek Yunita Safitri
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 1 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

The transmission of COVID-19 is one of the global problems that has caused many deaths. This pandemic was caused by SARS-CoV-2, which has several non-structural proteins (nsp1-nsp16). The non-structural proteins in SARS-CoV-2 have different amino acid compositions. The purpose of this study was to analyze the amino acid composition of SARS-CoV-2. This study used computational methods in silico analysis to analyze the amino acid composition of the target protein. The target protein sequence database was obtained from the NCBI website with the identity number NC_045512.2. Non-structural protein with the shortest amino acid length is owned by nsp7 (83 aa) with a molecular weight of 9239.34 Daltons, nsp9 (113 aa) with a molecular weight of 12377.54, and nsp1 (180 aa) with a molecular weight of 19774.35, while non-structural proteins with amino acid composition the longest is found in nsp3 (1945 aa) with a molecular weight of 217241.50 Daltons, nsp12 (932 aa) with a molecular weight of 106654.88 Daltons and nsp2 (638 aa) with a molecular weight of 70507.81 Daltons. The amino acid composition of each target protein varies in length, weight, and frequency. Information obtained from this reasearch result can be used as the basis for studying the characteristics of the non-structural protein in SARS-CoV-2, which causes the COVID-19 pandemic based on the composition of the constituent amino acids.

The Effect of Multiple Representation-Based Guided Inquiry on Learning Outcomes Reviewed from Scientific Thinking Skills Rendy Priyasmika
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 1 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

This research's background is the importance of understanding the concept of chemical equilibrium material to understand the complex chemical interactions. This material is seen as one of the most difficult subjects in learning chemistry at the school and university level, so it requires a good understanding of studying it. A good and appropriate understanding of learning chemistry requires scientific thinking skills. This study aimed to analyze the effect of guided inquiry learning models based on multiple representations on student learning outcomes in chemical equilibrium material. The design of this study used a Pre-Experimental Design with a One-Shot Case Study model. The subjects in this study were 25 students of the Chemistry Education program at Billfath University who took the Basic Chemistry course. The data was collected using the Classroom Test of Scientific Reasoning (CTSR) instrument and test questions on the learning outcomes of chemical equilibrium material. The data analysis technique in this study used a non-parametric statistical test with a t-test. The results showed (1) the learning outcomes of students with high scientific thinking skills were higher than students with low scientific thinking skills, (2) there was a significant effect of the guided inquiry learning model based on multiple representations on student learning outcomes.

Front Matter Vol 6 No 1 (Cover, Editorial Board, Preface, Table of Contents) EduChemia EduChemia
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 1 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

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

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Abstract

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Contact Name
Indah Langitasari

Contact Email
educhemia@untirta.ac.id

Phone
-

Journal Mail Official
educhemia@untirta.ac.id

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

Location
Kab. serang,

Banten

INDONESIA