Jurnal Pendidikan Kimia最新文献

Formulation and antibacterial activity of frankincense sap extract deodorant spray (Styrax benzoin) 乳香树液提取物除臭喷雾剂（安息香属）的配方和抗菌活性

Jurnal Pendidikan Kimia Pub Date : 2023-12-30 DOI: 10.24114/jpkim.v15i3.49009

Nora Susanti, J. Purba, M. Nizam, Cindy Agnesia, Astri Devi Br. Pakpahan

引用次数: 0

Self-efficacy assessment in chemistry learning: Development and validation using confirmatory factor analysis 化学学习中的自我效能感评估：利用确认性因素分析进行开发和验证

Jurnal Pendidikan Kimia Pub Date : 2023-12-30 DOI: 10.24114/jpkim.v15i3.48748

Jajang Muhariyansah, Hari Sutrisno, Fajar Naqsyahbandi

引用次数: 0

Comparative assessment of human salivary α-amylase inhibitor from Indonesian herbs 印度尼西亚草药中人体唾液α-淀粉酶抑制剂的比较评估

Jurnal Pendidikan Kimia Pub Date : 2023-12-30 DOI: 10.24114/jpkim.v15i3.51153

Khomaini Hasan, Angga Himas Setyawan, Muhamad Abidin, Nurul Aida Fathya, Dewi Ratih Handayani, Desy Linasari, S. Silaban, T. Subroto, Muhammad Yusuf

引用次数: 0

Preparing of chemical bonding learning media based android using smart apps creator program 使用智能应用程序创建程序制作基于安卓的化学键学习媒体

Jurnal Pendidikan Kimia Pub Date : 2023-12-30 DOI: 10.24114/jpkim.v15i3.51492

R. Silaban, Osi Annauli Br Girsang, Roselva Theresia Manalu, Marham Sitorus, Simson Tarigan, Irving Josafat Alexander

{"title":"Preparing of chemical bonding learning media based android using smart apps creator program","authors":"R. Silaban, Osi Annauli Br Girsang, Roselva Theresia Manalu, Marham Sitorus, Simson Tarigan, Irving Josafat Alexander","doi":"10.24114/jpkim.v15i3.51492","DOIUrl":"https://doi.org/10.24114/jpkim.v15i3.51492","url":null,"abstract":"The aim of this research is to obtain Android-based chemical bond learning media using the smart apps creator program that is feasible and eligible to use. To achieve the goal, development research has been carried out which refers to the 4 D model with the stages define, design, develop and disseminate. The research was conducted at SMA Negeri 5 Medan involving teachers and students of class X MIA. The research instruments used are non-test instruments including needs analysis instruments, feasibility test instruments and student response instruments. The research results are: (1). An Android-based chemical bond learning media has been obtained using a smart apps creator program with features main view, main menu, learning material, evaluation, summary and references. (2). The Android-based chemical bond learning media obtained was deemed suitable for use in learning with a feasibility level of 85.0% with very worthy category. (3). The students give good eligibility responded (82.6%) for the Android-based chemical bond learning media obtained with meets the requirements for use as learning media.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":" 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139140972","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

Development of ethnoscience-based student worksheets of redox reactions, volta cells, and corrosion using liveworksheets 利用 liveworksheets 开发基于民族科学的氧化还原反应、伏特电池和腐蚀问题学生作业单

Jurnal Pendidikan Kimia Pub Date : 2023-12-08 DOI: 10.24114/jpkim.v15i3.51211

Liana Vinca Rosea Cristy, Fransisca Ditawati Nur Pamenang

{"title":"Development of ethnoscience-based student worksheets of redox reactions, volta cells, and corrosion using liveworksheets","authors":"Liana Vinca Rosea Cristy, Fransisca Ditawati Nur Pamenang","doi":"10.24114/jpkim.v15i3.51211","DOIUrl":"https://doi.org/10.24114/jpkim.v15i3.51211","url":null,"abstract":"Learning about ethnoscience can help students better understand chemistry because it connects to their daily experiences. However, students often struggle with redox and electrochemical concepts due to a lack of appropriate learning materials and difficulty grasping these ideas. This research aims to achieve the following objectives: (1) develop ethnoscience-based student worksheets on redox reactions, Volta cells, and corrosion using Liveworksheets, following the 4D development model modified to 3D; (2) create ethnoscience-based student worksheets on these topics that are valid, effective, and practical. The research employed validation sheets and questionnaires as instruments, with a sample of six students from the 12th grade. Data was analyzed descriptively. The results indicate that (1) the modified 4D development model was suitable for creating the student worksheets due to its systematic stages and adaptability to researchers' needs; (2) both the media and material showed high validity percentages, averaging 88% and 89%, respectively. The worksheets were considered quite effective, with an average percentage of 66%, and practical, with an average percentage of 78%. Overall, the developed product can be effectively used to teach redox reactions, voltaic cells, and corrosion in chemistry using Liveworksheets.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"285 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139011113","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

Formulation and evaluation of liquid soap preparation of robusta green coffee extract (Coffea canephora) with virgin coconut oil (VCO) base as an antibacterial Staphylococcus aureus 罗布斯塔绿咖啡提取物（Coffea canephora）与初榨椰子油（VCO）为基质的液体肥皂制剂的配制与评估，可抗菌金黄色葡萄球菌

Jurnal Pendidikan Kimia Pub Date : 2023-12-08 DOI: 10.24114/jpkim.v15i3.50078

Ing Mayfa Br Situmorang, Feronika Evma Rahayu, Opi Dwi Nurhayati

{"title":"Formulation and evaluation of liquid soap preparation of robusta green coffee extract (Coffea canephora) with virgin coconut oil (VCO) base as an antibacterial Staphylococcus aureus","authors":"Ing Mayfa Br Situmorang, Feronika Evma Rahayu, Opi Dwi Nurhayati","doi":"10.24114/jpkim.v15i3.50078","DOIUrl":"https://doi.org/10.24114/jpkim.v15i3.50078","url":null,"abstract":"Staphylococcus aureus can be found on the surface of the skin. One way to prevent Staphylococcus aureus on the skin is to clean the skin with soap. Liquid soap effectively removes dirt from the skin surface and protects the skin from bacteria. Determining the robusta green coffee bean extracts (Coffea canephora) appropriate activity was the study’s major aim in a liquid soap that complies with SNI 06-4085-1996 for use as an antibacterial agent and meets the physical quality requirements for liquid soap preparations. The extraction is performed by a soxhlet extraction method with 96% ethanol. The results of the organoleptic test show a difference in color at each concentration, with the concentration of the extract, which is higher, affecting the color and odor, the results of the homogeneity show results that are homogeneous and free of coarse grains, the results of the pH test show results that meet the requirements, namely in the interval 8-11, the results of the viscosity show results that meet the SNI requirements of 400-4000Cps, the results of the foam height test show stable results and meet the SNI requirements of 13-220 mm. the results of the inhibition zone in the liquid bath soap preparation of robusta green coffee bean extract using the disk diffusion method show that F0 = 4.51mm (resistant), F1 = 11.11mm (resistant), F2 = 13.35mm (intermediate) and F3 = 20.57mm (suspicious).","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"93 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139011566","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

Feasibility study of concentration of chemical and physical parameters in excavated water coal mining as a cage fishing destination 将煤矿采掘水体作为网箱捕鱼目的地的化学和物理参数浓度可行性研究

Jurnal Pendidikan Kimia Pub Date : 2023-12-08 DOI: 10.24114/jpkim.v15i3.50939

Saibun Sitorus, A. Khafifah Dwi Rachmat

{"title":"Feasibility study of concentration of chemical and physical parameters in excavated water coal mining as a cage fishing destination","authors":"Saibun Sitorus, A. Khafifah Dwi Rachmat","doi":"10.24114/jpkim.v15i3.50939","DOIUrl":"https://doi.org/10.24114/jpkim.v15i3.50939","url":null,"abstract":"A research was carried out on the feasibility of chemical and physical concentrations in coal mine excavation water for use in cage fisheries. This research aims to analyze the concentration conditions of chemical parameters (NH3, pH, Cu and Fe) and physical parameters (DO, temperature and turbidity) in water originating from coal excavations which are already in the form of lakes. Samples were prepared before analysis by adding concentrated nitric acid. Analysis of Cu and Fe concentrations was carried out using an Atomic Absorption Spectrophotometer (AAS), ammonia using a UV-Vis Spectrophotometer, DO concentrations were analyzed using the titration method, turbidity analysis using a nephelometer, temperature using a thermometer and pH using a pH meter. From the research results, it was found that the physical parameters of lake water from former coal mine excavations were pH, temperature, DO, NH3 and turbidity is suitable because it has not yet passed the quality standards for designation as a cage for cultivating freshwater fish. The concentration of the heavy metal Cu in coal excavation water has exceeded the quality standards set for cultivating freshwater fish and the metal concentration Fe has not exceeded the quality standards set. Research analysis of the average concentrations of heavy metals in water samples from former coal mining pools, namely Cu (0.166; 0.278; 0.284 mg/L), and Fe (0.020; 0.029; 0.023 mg/kg).","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"85 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139010962","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

Mental model of the influence of reactant properties on reaction rate 反应物性质对反应速率影响的心智模式

Jurnal Pendidikan Kimia Pub Date : 2023-12-08 DOI: 10.24114/jpkim.v15i3.50411

Iqlima Rahayu, W. Wiji, Galuh Yuliani, T. Widhiyanti, Sri Mulyani

{"title":"Mental model of the influence of reactant properties on reaction rate","authors":"Iqlima Rahayu, W. Wiji, Galuh Yuliani, T. Widhiyanti, Sri Mulyani","doi":"10.24114/jpkim.v15i3.50411","DOIUrl":"https://doi.org/10.24114/jpkim.v15i3.50411","url":null,"abstract":"Reaction rate is still considered difficult by students because it contains abstract concepts and mathematical equations, so students' mental models are not complete. To connect the three levels of representation in the process of addressing chemical problems, learning has to employ mental models as a whole. Therefore, this study aims to obtain students' mental models regarding the influence of reactants properties on reaction rates. This research uses a qualitative descriptive method with the Mental Model Diagnostic Test-Interview About Event (MMDT-IAE) instrument. Based on the research results, there are two types of mental models, namely Partial Understanding (PU) and Partial Understanding with Certain Misconceptions (PU/SM). The effect of surface area on reaction rate, students 1, 2, 3, 4, 6, and 7 answered correctly but could not connect the three levels of representation, while student 5 could not explain the relationship between effective collisions and reaction rate. The influence of structure on reaction rates, students 1, 2, 3, 4, and 7 can answer structure, reactivity and collision theory, while student 5 cannot explain collision theory. Students 1, 4, and 7 can answer all the probing questions but cannot connect the three levels to the influence of ionization energy on the reaction rate. The conclusion of this research is that students' mental models regarding the influence of reactant properties are not complete and there are students who experience misconceptions. The implications of this research are as a basis for teachers to design appropriate learning strategies.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"333 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139011059","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

The antimicrobial study of white turmeric (Curcuma zedoaria) extracted using deep euthectic solvent (DES) and ultrasonication 使用深层溶剂（DES）和超声提取白姜黄（Curcuma zedoaria）的抗菌研究

Jurnal Pendidikan Kimia Pub Date : 2023-12-08 DOI: 10.24114/jpkim.v15i3.49349

Timotius Agung Soripada, Erny Tandanu, Refi Ikhtiari

{"title":"The antimicrobial study of white turmeric (Curcuma zedoaria) extracted using deep euthectic solvent (DES) and ultrasonication","authors":"Timotius Agung Soripada, Erny Tandanu, Refi Ikhtiari","doi":"10.24114/jpkim.v15i3.49349","DOIUrl":"https://doi.org/10.24114/jpkim.v15i3.49349","url":null,"abstract":"This research is prompted by the emergence of various cases of infectious diseases and antibiotic resistance that often occur and the development of the latest research methods in the field of medicinal plants. One of the medicinal plants that is often used is Curcuma zedoaria which is generally extracted using conventional solvents. This research aims to find new innovations in the extraction process of medicinal plants. This research is a laboratory experiment carried out in vitro. This research uses the latest solvent, called DES (Deep Eutectic Solvent) with the help of ultrasonication to extract active compounds from C. zedoaria as a natural anti-bacterial. DES is known as an environmentally friendly solvent, cheap, easy to make, and is still relatively new in Indonesia. The C. zedoaria extraction process uses two types of DES solvent composition assisted by a ultrasonicator. The research results show that: White turmeric extract (C. zedoaria) obtained by extraction using DES solvent and ultrasonication. Ultrasonication results using 30%, 70% and 100% DES solvent showed antimicrobial properties against Escherichia coli with a lower zone of inhibition compared to the antibiotic ciprofloxacin. Ultrasonication results using 30%, 70% and 100% DES solvent showed antimicrobial properties against Staphylococcus aureus with a lower zone of inhibition compared to ciprofloxacin. TLC data shows that the white turmeric extract obtanined contains various antimicrobial substances which allows to inhibit each other to such an extent that their activity is lower than ciprofloxacin.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"226 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139011260","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

The effect of calcium oxide addition from feather clam shells on porosity and water adsorption geopolymer composite bricks 从羽蛤壳中添加氧化钙对孔隙率和吸水性土工聚合物复合砖的影响

Jurnal Pendidikan Kimia Pub Date : 2023-12-08 DOI: 10.24114/jpkim.v15i3.50903

N. Nurfajriani, Yohansen Wahyudi

引用次数: 0