EduChemia (Jurnal Kimia dan Pendidikan)最新文献_第4页

Antioxidant Activity Test on Ethanol Extract Of Soursop Leaves (Annona muricata L.) Using DPPH Method (1,1-diphenyl-2-picrylhidrazyl) 番荔枝叶乙醇提取物的抗氧化活性试验DPPH法(1,1-二苯基-2-苦味基肼基)

EduChemia (Jurnal Kimia dan Pendidikan) Pub Date : 2021-12-30 DOI: 10.30870/educhemia.v6i2.10159

A. Gani, Ratih Delviyanti, R. Rusman

{"title":"Antioxidant Activity Test on Ethanol Extract Of Soursop Leaves (Annona muricata L.) Using DPPH Method (1,1-diphenyl-2-picrylhidrazyl)","authors":"A. Gani, Ratih Delviyanti, R. Rusman","doi":"10.30870/educhemia.v6i2.10159","DOIUrl":"https://doi.org/10.30870/educhemia.v6i2.10159","url":null,"abstract":"Soursop plant parts that are often used by the community, namely the fruit and leaves. Ripe soursop fruit is usually developed to produce juice and lunkhead products. Ripe soursop fruit contains vitamin C which is known to have a wrong function, namely to increase immunity, so that it can protect the body from pathogens. Soursop leaves are often used by the community in the form of a decoction of the leaves for traditional medicine. The research about antioxidant test on ethanol extract of soursop leaves (Annona muricata Linn) had been conducted using DPPH method (1,1-diphenyl-2-picrylhdirazyl). This research aims to indicate the antioxidant activity of soursop leaves. Samples were collected from Lambaro Skep, a region of Banda Aceh. Then, the sample was dried by air before macerated using ethanol 96%. After that, the filtrate is evaporated using rotary evaporator and concentrated again using a hairdryer. The concentrated extract is then tested for antioxidant activity using DPPH method at maximum wavelength of 517 nm. The result shows young soursop leaves extract has 14.462 ppm of IC50 value, while old soursop leaves extract has IC50 value of 9.626 ppm.","PeriodicalId":269986,"journal":{"name":"EduChemia (Jurnal Kimia dan Pendidikan)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134320030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Green Synthesis and Characterization of Cinnamylideneacetophenone Compound Using Fe3O4 Magnetic as Catalyst Fe3O4磁性催化剂绿色合成肉桂基苯乙酮化合物及表征

EduChemia (Jurnal Kimia dan Pendidikan) Pub Date : 2021-12-30 DOI: 10.30870/educhemia.v6i2.10412

Dori Fitria, A. Cahyana, A. R. Liandi

引用次数: 1

Development of SETS (Science, Environment, Technology, And Society) Oriented Chemical Learning Module on Natural Oil Concept 开发集(科学，环境，技术和社会)为导向的化学学习模块的天然石油概念

EduChemia (Jurnal Kimia dan Pendidikan) Pub Date : 2021-11-19 DOI: 10.30870/educhemia.v6i2.10554

R. Aisyah, I. Langitasari, Irma Sadiah

{"title":"Development of SETS (Science, Environment, Technology, And Society) Oriented Chemical Learning Module on Natural Oil Concept","authors":"R. Aisyah, I. Langitasari, Irma Sadiah","doi":"10.30870/educhemia.v6i2.10554","DOIUrl":"https://doi.org/10.30870/educhemia.v6i2.10554","url":null,"abstract":"The Indonesian government is trying to prepare the next generation of nations to deal with the globalization era; one of these is education. It was transformed in the application of Kurikulum 2013, in which the object of the learning process is more emphasis on phenomena or real events. But, the learning methods are still unvaried, and learning materials based on real-life problems are still not available, which creates a performance gap in the learning process. This research aims to cope with the performance gap by developing the saints, environment, technology, and society (SETS)-oriented module on petroleum topic and determine the students' response. The module developed in this research is done following a phase of the ADDIE developmental model. This developmental model consists of analyze, design, development, implementation, and evaluation. This SETS-oriented module has been trialed to 30 second-grade students of SMA Negeri 8 Kota Serang. According to validation and students' response, the SETS-oriented module developed is valid and got 87,37% of an average percentage of response, which includes great criteria.","PeriodicalId":269986,"journal":{"name":"EduChemia (Jurnal Kimia dan Pendidikan)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115012457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Front Matter Vol 6 No 1 (Cover, Editorial Board, Preface, Table of Contents) 封面第6卷第1期(封面、编委、序、目录)

EduChemia (Jurnal Kimia dan Pendidikan) Pub Date : 2021-01-30 DOI: 10.30870/educhemia.v6i1.10619

EduChemia EduChemia

引用次数: 0

Back Matter Vol 6 No 1 (Author Guidelines, Acknowledgment) 后刊第6卷第1期(作者指南，致谢)

EduChemia (Jurnal Kimia dan Pendidikan) Pub Date : 2021-01-30 DOI: 10.30870/educhemia.v6i1.10620

EduChemia EduChemia

引用次数: 0

The Effect of Multiple Representation-Based Guided Inquiry on Learning Outcomes Reviewed from Scientific Thinking Skills 从科学思维技能看多重表征导向探究对学习成果的影响

EduChemia (Jurnal Kimia dan Pendidikan) Pub Date : 2021-01-28 DOI: 10.30870/EDUCHEMIA.V6I1.8985.G6872

Rendy Priyasmika

{"title":"The Effect of Multiple Representation-Based Guided Inquiry on Learning Outcomes Reviewed from Scientific Thinking Skills","authors":"Rendy Priyasmika","doi":"10.30870/EDUCHEMIA.V6I1.8985.G6872","DOIUrl":"https://doi.org/10.30870/EDUCHEMIA.V6I1.8985.G6872","url":null,"abstract":"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.","PeriodicalId":269986,"journal":{"name":"EduChemia (Jurnal Kimia dan Pendidikan)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121245662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Strengthening Pedagogical Content Knowledge of Prospective Chemistry Teacher: Metacognitive Based Preparation Program for Students’ Self-Efficacy 强化准化学教师的教学内容知识:基于元认知的学生自我效能准备方案

EduChemia (Jurnal Kimia dan Pendidikan) Pub Date : 2021-01-28 DOI: 10.30870/EDUCHEMIA.V6I1.9113

E. L. Allo, A. Permanasari, W. Wiji, S. Redjeki

{"title":"Strengthening Pedagogical Content Knowledge of Prospective Chemistry Teacher: Metacognitive Based Preparation Program for Students’ Self-Efficacy","authors":"E. L. Allo, A. Permanasari, W. Wiji, S. Redjeki","doi":"10.30870/EDUCHEMIA.V6I1.9113","DOIUrl":"https://doi.org/10.30870/EDUCHEMIA.V6I1.9113","url":null,"abstract":"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.","PeriodicalId":269986,"journal":{"name":"EduChemia (Jurnal Kimia dan Pendidikan)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126643803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Practicality of an Android Based Chemistry Adventure Game as a Chemical Bond Learning Media 基于Android的化学冒险游戏作为化学键学习媒介的实用性

EduChemia (Jurnal Kimia dan Pendidikan) Pub Date : 2021-01-28 DOI: 10.30870/EDUCHEMIA.V6I1.7929.G6873

Valdo Ayona, R. Hidayah

引用次数: 2

Activated Carbon from Plantain Stems as NO2ˉ and Mn2+ Adsorbent on Well Water 车前草茎活性炭对井水NO2 +和Mn2+的吸附剂研究

EduChemia (Jurnal Kimia dan Pendidikan) Pub Date : 2021-01-28 DOI: 10.30870/EDUCHEMIA.V6I1.8887.G6871

Betsy Felita, C. A. Riyanto, Y. Martono

{"title":"Activated Carbon from Plantain Stems as NO2ˉ and Mn2+ Adsorbent on Well Water","authors":"Betsy Felita, C. A. Riyanto, Y. Martono","doi":"10.30870/EDUCHEMIA.V6I1.8887.G6871","DOIUrl":"https://doi.org/10.30870/EDUCHEMIA.V6I1.8887.G6871","url":null,"abstract":"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 (NO 2 ˉ) and manganese (Mn 2+ )contaminants has been carried out. Synthesis of activated carbon from Plantain stem (ACPS) was carried out with a carbon: H 3 PO 4 impregnation ratio of 1:6 (w/w) and heating using a furnace at 600 o C 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-NH 3 + 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 NO 2 ˉ and Mn 2+ ions followed the Redlich-Peterson isotherm with R 2 values of 0.9968 and 0.4753, respectively. The adsorption kinetics of ACPS on NO 2 ˉ and Mn 2+ ions followed the Diffusion Intraparticle model with R 2 values of 0.8585 for NO 2 ˉ ions and Pseudo Second Order with R 2 values of 0.9482 for Mn2+ ions. In the study of the adsorption efficiency of NO 2 ˉ and Mn 2+ ions using ACPS on well water in the Guyangan Jepara villages, it was found that the reduction efficiency was 15%, only at NO 2 ˉ ion levels.","PeriodicalId":269986,"journal":{"name":"EduChemia (Jurnal Kimia dan Pendidikan)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122834750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Amino Acids Composition of Non-Structural Protein in SARS-CoV-2 the Cause of COVID-19 Pandemic SARS-CoV-2非结构蛋白的氨基酸组成及其引起COVID-19大流行的原因

EduChemia (Jurnal Kimia dan Pendidikan) Pub Date : 2021-01-28 DOI: 10.30870/EDUCHEMIA.V6I1.9220.G6868

S. Suprianto, Ni Kadek Dewi Permatasari, Gusti Ayu Kadek Yunita Safitri

{"title":"Amino Acids Composition of Non-Structural Protein in SARS-CoV-2 the Cause of COVID-19 Pandemic","authors":"S. Suprianto, Ni Kadek Dewi Permatasari, Gusti Ayu Kadek Yunita Safitri","doi":"10.30870/EDUCHEMIA.V6I1.9220.G6868","DOIUrl":"https://doi.org/10.30870/EDUCHEMIA.V6I1.9220.G6868","url":null,"abstract":"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.","PeriodicalId":269986,"journal":{"name":"EduChemia (Jurnal Kimia dan Pendidikan)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133857947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0