Jurnal Pendidikan Kimia最新文献_第9页

Development of student worksheet for blended learning based guide inquiry and science process skill in reduction and oxidation reaction 在还原和氧化反应中，基于引导探究和科学过程技能的混合式学习的学生工作表的开发

Jurnal Pendidikan Kimia Pub Date : 2021-08-01 DOI: 10.24114/jpkim.v13i2.26979

Sinda Febrilia Miharti, Harizon Harizon, Zurweni Zurweni

引用次数: 0

Learning buffer solution based on virtual lab in senior high school 基于虚拟实验室的高中学习缓冲解决方案

Jurnal Pendidikan Kimia Pub Date : 2021-04-01 DOI: 10.24114/JPKIM.V13I1.24144

Gulmah Sugiharti, Aldhi Kurnia

{"title":"Learning buffer solution based on virtual lab in senior high school","authors":"Gulmah Sugiharti, Aldhi Kurnia","doi":"10.24114/JPKIM.V13I1.24144","DOIUrl":"https://doi.org/10.24114/JPKIM.V13I1.24144","url":null,"abstract":"This study aims to determine whether there is a difference between the use of virtual lab and real lab media in guided inquiry learning on learning outcomes in the buffer solution material. Both learning media are taught using the same learning model, namely the guided inquiry learning model. The samples in this study were class XI MIPA 3 as the experimental I which was taught with the guided inquiry learning model using virtual lab media and class XI MIPA 6 as the experimental II which was taught by guided inquiry learning model using real lab. The instrument used in this research was a test of learning outcomes chemistry of the buffer solution material. The data analysis technique for hypothesis testing was the two-party t-test statistic. The results of data processing showed that the experimental I had a pretest mean of 26.04 and a mean of posttest 79.53, while the experimental II had a mean pretest of 47.95 and a mean of posttest of 72.84. Hypothesis testing was carried out using two-party t test from the learning outcomes data and it was obtained tcount = 2.201 while ttable = 1.988 for α = 0.05 so that tcount> ttable. So Ha accept, that is, there are differences in student learning outcomes taught by guided inquiry models using virtual lab and real lab media. Meanwhile, the increase in student learning outcomes in guided inquiry classes using virtual labs was 72%, and those using real labs were 52%. Keywords: Virtual lab, Real lab, Guided inquiry, Buffer solutions","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91004465","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

Synthesis and characterization of capsule shells non gelatin grass jelly leaves-seaweed as drug delivery system material 非明胶草叶-海藻胶囊壳给药系统材料的合成与表征

Jurnal Pendidikan Kimia Pub Date : 2021-04-01 DOI: 10.24114/JPKIM.V13I1.24138

M. Mahardika, F. Amin, Ika Agustia Umami, Boima Situmeang, A. Ibrahim

{"title":"Synthesis and characterization of capsule shells non gelatin grass jelly leaves-seaweed as drug delivery system material","authors":"M. Mahardika, F. Amin, Ika Agustia Umami, Boima Situmeang, A. Ibrahim","doi":"10.24114/JPKIM.V13I1.24138","DOIUrl":"https://doi.org/10.24114/JPKIM.V13I1.24138","url":null,"abstract":"Drug delivery system is a system that describes the journey of a drug to its target location. The main component of the drug delivery system is gelatin. The leaves of grass jelly-seaweed are needed as a raw material for gelatin. The main component of gelling agents in grass jelly leaves and seaweed is a low-methoxy pectin polysaccharide. Pectin from previous study is used as a synthesis material for hard capsule shells with the addition of other ingredients, which are Na-CMC, sorbitol, and water. The characterization results of capsule shells with variations in the composition of grass jelly-seaweed leaves 0: 4, 1: 3, 2: 2, 3: 1, and 4: 0 (A, B, C, D and E) have a disolving time of 12 minutes 45 seconds; 15 minutes 53 seconds; 23 minutes 10 seconds; 15 minutes 35 seconds and 18 minutes 12 seconds. The swelling degree test each of 200%; 266,7%; 303.3%; 586.7% and 643.3%. Furthermore, the shells of grass jelly-seaweed leaf capsules were tested for their material performance in the cefadroxyl disolving test with variations in sampling time of 10, 20, and 30 minutes. Keywords: Cefadroxyl, Drug delivery system, Green grass jelly leaves, Non-gelatin capsules, Seaweed","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76780312","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 differences of achievement of the national olympiad in chemistry at the public and private senior high school by utilizing quizizz media 利用测验媒体分析公立与私立高中化学国奥赛成绩的差异

Jurnal Pendidikan Kimia Pub Date : 2021-04-01 DOI: 10.24114/JPKIM.V13I1.24146

L. Purba, N. Harefa, Sali Afridika, Dera Savera

引用次数: 5

Need analysis for the development of chemical literation integrated problem-solving module 需要分析开发化学识字综合问题解决模块

Jurnal Pendidikan Kimia Pub Date : 2021-04-01 DOI: 10.24114/JPKIM.V13I1.24143

R. Edi, M. Haryani, E. Ad’hiya

引用次数: 0

Student worksheet oriented on science, technology, engineering, and mathematics (STEM) with PjBL model on acid base matter by using natural product 以科学、技术、工程和数学(STEM)为导向的学生工作表，使用天然产物进行酸碱物质的PjBL模型

Jurnal Pendidikan Kimia Pub Date : 2021-04-01 DOI: 10.24114/JPKIM.V13I1.24141

Imtikhana Nur Khofifah, M. Mitarlis

{"title":"Student worksheet oriented on science, technology, engineering, and mathematics (STEM) with PjBL model on acid base matter by using natural product","authors":"Imtikhana Nur Khofifah, M. Mitarlis","doi":"10.24114/JPKIM.V13I1.24141","DOIUrl":"https://doi.org/10.24114/JPKIM.V13I1.24141","url":null,"abstract":"This study aims to describe the feasibility of the student worksheet developed in improving critical, creative, collaborative, and communicative thinking skills of students on acid-base material by using natural product. The student worksheet developed refers to the project-based learning model, which is integrated to science, technology, engineering, and mathematics (STEM). Method of this study uses a 4-D model (define, design, develop and disseminate), which is limited only to the development stage, and limited trials are carried out to nine students at senior high school. The feasibility of student worksheet is viewed from three aspects, namely validity, practicality, and effectiveness. The validity is viewed from the results of content and construct validity. The results obtained on each criterion show that the percentage score of 92.95% and 91.15% on very good category. The student worksheet's practicality in terms of activity observation and student response for each component obtained a percentage score of 95.18% and 88.09% on very practical category. The student worksheet's effectiveness in terms of the completeness of student learning outcomes showed an increase in the average N-Gain score of 0.84 on very high category and declared effective. Thus, the feasibility of the developed student worksheet in terms of all aspects such as percentage of scores obtained ≥ 61% in the aspects of validity, practicality and N-gain ≥ 0.3 in the aspect of effectiveness. So, the developed students worksheet oriented to STEM with PjBL model on acid base matter by using natural product is feasible for use in the learning. Keywords: acid-base, PjBL, STEM, student worksheet","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"84 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81950090","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

The development of teaching materials oriented to critical thinking skills for chemistry class XI high school 高中化学11班批判性思维能力教材的开发

Jurnal Pendidikan Kimia Pub Date : 2021-04-01 DOI: 10.24114/JPKIM.V13I1.24145

R. Siahaan, Marham Sitorus, S. Silaban

{"title":"The development of teaching materials oriented to critical thinking skills for chemistry class XI high school","authors":"R. Siahaan, Marham Sitorus, S. Silaban","doi":"10.24114/JPKIM.V13I1.24145","DOIUrl":"https://doi.org/10.24114/JPKIM.V13I1.24145","url":null,"abstract":"This study aims to determine the feasibility of teaching materials oriented critical thinking ability grade XI SMA developed. This research includes research and development with 3D development model (define, design and develop). The teaching materials developed were validated based on aspects of material feasibility, language and media by experts using validation sheets in accordance with BSNP standards and then the validated teachng materials were distributed to two teachers and grade XI students at Sultan Agung Private High School and SMAN 1 Pematangsiantar to find out the response of teachers and students using questionnaires. The results of the study found that expert validation of teaching materials developed has an average score of 4.17 in terms of content feasibility, 4.20 for the aspect of presentation feasibility, 4.33 for the linguistic aspect and 4.19 from the aspect of graphation. While students' response to critical thinking ability-oriented module teaching materials had average scores of 3.80 and 3.82 and teacher responses averaged a score of 4.27, judging by interest indicators, material indicators and language indicators. These results show that the critical thinking ability-oriented teaching materials developed have met valid and good criteria for use. Keywords: Teaching materials, Critical yhinking skills, Chemical equilibrium, 3D models","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77252984","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: 4

Utilization of leaf and fruit extracts of kedondong (Spondias dulcis Forst) as a supporting material for energy conversion in dye sensitized solar cells and electrochemical cells 在染料敏化太阳能电池和电化学电池中作为能量转换支撑材料的沙斛叶和果实提取物的利用

Jurnal Pendidikan Kimia Pub Date : 2021-04-01 DOI: 10.24114/JPKIM.V13I1.24140

A. Ibrahim, Boima Situmeang, A. Rifa’i, Afif Hidayatul Mustafid

{"title":"Utilization of leaf and fruit extracts of kedondong (Spondias dulcis Forst) as a supporting material for energy conversion in dye sensitized solar cells and electrochemical cells","authors":"A. Ibrahim, Boima Situmeang, A. Rifa’i, Afif Hidayatul Mustafid","doi":"10.24114/JPKIM.V13I1.24140","DOIUrl":"https://doi.org/10.24114/JPKIM.V13I1.24140","url":null,"abstract":"This study aims to obtain a dye sensitized solar cell (DSSC) prototype and a voltaic cell prototype using the kedondong plant (Spondias dulcis Forst). Kedondong leaves as a source of chlorophyll were deliberately chosen to be in line with the use of kedondong fruit as a material for electrochemical cells, so that two research results could be obtained from the kedondong plant. This research is for the application of scientific development, increasing the added value of kedondong plant, and as support for the use of environmentally friendly energy. Research methods in general are chlorophyll extraction, citric acid isolation, chlorophyll testing, DSSC assembly, electrochemical cell assembly, and performance testing for both DSSC and electrochemical cells. The analysis results show that typical peaks appear for the functional groups in chlorophyll at certain wave numbers. Hydroxyl (-OH) groups appear in the range of 3650 - 3200 cm-1, the C=C group at 1700 - 1500 cm-1, the C-N group at 1350 - 1000 cm-1, and the C-O group at 1300 - 1000 cm-1. Quantitative testing used a UV-Vis spectrophotometer at 645 nm and 633 nm, the results obtained were chlorophyll a was 4.52 mg/L, chlorophyll b was 8.43 mg/L, and total chlorophyll was 12.95 mg/L. The DSSC prototype performance test with a size of only 2.5 cm2, can produce a minimum voltage of 30.1 mV and a maximum of 280 mV. The electrochemical test of kedondong citric acid extract showed that the value of the electric voltage ranged from 121 to 630 mV. Keywords: Kedondong, Chlorophyll, DSSC, Citric acid, Electrochemical cells","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78264675","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

The development of learning modul of colloid system integrated with project based learning (PjBL) system to increase the result of students’ learning 胶体系统学习模块的开发与基于项目的学习(PjBL)系统相结合，以提高学生的学习效果

Jurnal Pendidikan Kimia Pub Date : 2021-04-01 DOI: 10.24114/JPKIM.V13I1.24147

Sri Wartika, Z. Muchtar, W. Hutabarat

{"title":"The development of learning modul of colloid system integrated with project based learning (PjBL) system to increase the result of students’ learning","authors":"Sri Wartika, Z. Muchtar, W. Hutabarat","doi":"10.24114/JPKIM.V13I1.24147","DOIUrl":"https://doi.org/10.24114/JPKIM.V13I1.24147","url":null,"abstract":"This research aims to develop learning material in the form of colloid learning system module integrated with PjBL model in accordance with curriculum 2013 and to find out the increasing of students learning result after using learning module of colloid system integrated with Project Based Learning (PjBL) system. The type of the study is development research and experiment. It examines how the module of Integrated with Project Based Learning (PjBL) integrated with PjBL model is organized based on curriculum 2013 and the experiment is managed by analyzing the using of the module in senior high school. The study was carried out to the students of 9th grade of SMA Negeri 1 Sunggal and SMA Swasta Muhammadiyah 18 Sunggal school year of 2018/2019 in second semester. The data are examined by using independent sample of T-test by using SPSS 23 program. The result shows that colloid system module integrated with PjBL developed model is valid and appropriate to be used based on BSNP.The score of the students who are taught by with the module has increased in average about 82.80 (high) with a pretest score of 31.80 (low), the score of the students who are taught by using textbooks increase to 77.60 (middle) with a pretest score of 32.40 (low). Keywords: Module, Colloid, Project based learning","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76080269","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

Alkaloid compound from Tombili (Caesalpinia bonduc) as biopesticide agent on rice plants 对水稻的生物农药作用研究

Jurnal Pendidikan Kimia Pub Date : 2020-12-30 DOI: 10.24114/jpkim.v12i3.21165

W. Musa, Suleman Duengo, A. Kilo, Boima Situmeang

{"title":"Alkaloid compound from Tombili (Caesalpinia bonduc) as biopesticide agent on rice plants","authors":"W. Musa, Suleman Duengo, A. Kilo, Boima Situmeang","doi":"10.24114/jpkim.v12i3.21165","DOIUrl":"https://doi.org/10.24114/jpkim.v12i3.21165","url":null,"abstract":"The purpose of these study is to determine the effect of active compound from tombili seed extract as a vegetable pesticide in the prevention of soil pest in rice plants. The method of these researches is isolation to obtain pure isolates, characterization by using infrared spectrophotometer (IR) and UV-VIS spectrophotometer then following biological test. The isolates obtained were tested positive for phytochemical containing alkaloid compounds and characterized as amorphous crystals. Identification of IR spectrophotometer generate a functioning -NH wave group of the wavelengths region of 3423.4 cm-1, bend C-N at wave number 1242.1 cm-1, C-H stretch at wave number 2925.8 and 2854.5 cm-1, bend C-H at 1475 wave numbers 1540 cm-1, carbonyl group (C = O) at the 1720.4 cm-1 wave number which is probably an alkaloid compound. The UV-VIS spectrophotometer results in a maximum absorption at 209.9 nm wavelengths indicated the presence of double bonds between the C = O functional group suspected as a result of the successive electronic transitions to n-π * and n-σ *. The result of biological test showed that methanol extracts of tombili seed can be used as a vegetable pesticide in pest prevention on rice plants, the most effective concentration used in this biological test is at 0.1% concentration, with very high effectiveness in eradicating pest on rice plants.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88903569","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