Pub Date : 2020-12-01DOI: 10.24114/jpkim.v12i3.21160
Esa Witri, N. Ngatijo, Muhammad Haris Effendi-Hasibuan
This research is part of a research project to help improve students' argumentative skills in chemistry subjects. This research is part of the development of argumentation-based teaching materials while other studies have developed learning models, teaching materials and a collection of argumentation questions. The purpose of this research was to determine the process of developing students' e-worksheets, the feasibility of students' e-worksheets based on concept and practitioner perceptions, and the effectiveness of students' e-worksheets that were developed as teaching materials based on the Toulmin argumentation pattern. Product trials were conducted at state senior high schools 11 Jambi City. The results of the practitioner's eligibility based on the teacher's response are in the very good category and students from both groups have a correlation in the "high" category. The effectiveness test is seen from the average N-Gain score of the experimental class in the quite effective category. There is a significant difference between the experimental class and the control class which can be seen from the difference in learning outcomes of the experimental class (using students' e-LKS based on the Toulmin argumentation pattern) higher than the control class (not using e-LKS).
{"title":"Development of electronic student worksheets based on toulmin argumentation patterns to improve argumentation skills in basic acid materials","authors":"Esa Witri, N. Ngatijo, Muhammad Haris Effendi-Hasibuan","doi":"10.24114/jpkim.v12i3.21160","DOIUrl":"https://doi.org/10.24114/jpkim.v12i3.21160","url":null,"abstract":"This research is part of a research project to help improve students' argumentative skills in chemistry subjects. This research is part of the development of argumentation-based teaching materials while other studies have developed learning models, teaching materials and a collection of argumentation questions. The purpose of this research was to determine the process of developing students' e-worksheets, the feasibility of students' e-worksheets based on concept and practitioner perceptions, and the effectiveness of students' e-worksheets that were developed as teaching materials based on the Toulmin argumentation pattern. Product trials were conducted at state senior high schools 11 Jambi City. The results of the practitioner's eligibility based on the teacher's response are in the very good category and students from both groups have a correlation in the \"high\" category. The effectiveness test is seen from the average N-Gain score of the experimental class in the quite effective category. There is a significant difference between the experimental class and the control class which can be seen from the difference in learning outcomes of the experimental class (using students' e-LKS based on the Toulmin argumentation pattern) higher than the control class (not using e-LKS).","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"88 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83823652","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}
Pub Date : 2020-12-01DOI: 10.24114/jpkim.v12i3.21163
N. Harefa, Marudut Sinaga, S. Silaban
Interest in learning is a passion or a great desire for something that is closely related to personality, motivation, expression and self-concept, identification, heredity, and external factors. Interest in learning affects the cognitive, affective, and psychomotor aspects of students. In this study, analyzed and interpreted student interest in learning through media-based learning Quizizz and students' perceptions of the media. Based on the analysis and interpretation of the data, indicators of student interest in the media Quizizz increased by 0.818 in the high category, indicators of student attention increased by 0.555 in the medium category, indicators of feelings of pleasure increased by 0.684 in the medium category, and indicators of student involvement increased by 0.599 in the medium category. Also, 76.32% of students thought that Quizizz media were very interesting, 50% thought that Quizizz media were easily applied, 86.84% thought that Quizizz media accommodate students to compete fairly, and 44.74% thought that Quizizz media were practically applied. Thus, students have a good perception of the Quizziz media accompanied by increased interest in learning.
{"title":"Students perception and interest on chemistry: Learning evaluation integrated quizziz media","authors":"N. Harefa, Marudut Sinaga, S. Silaban","doi":"10.24114/jpkim.v12i3.21163","DOIUrl":"https://doi.org/10.24114/jpkim.v12i3.21163","url":null,"abstract":"Interest in learning is a passion or a great desire for something that is closely related to personality, motivation, expression and self-concept, identification, heredity, and external factors. Interest in learning affects the cognitive, affective, and psychomotor aspects of students. In this study, analyzed and interpreted student interest in learning through media-based learning Quizizz and students' perceptions of the media. Based on the analysis and interpretation of the data, indicators of student interest in the media Quizizz increased by 0.818 in the high category, indicators of student attention increased by 0.555 in the medium category, indicators of feelings of pleasure increased by 0.684 in the medium category, and indicators of student involvement increased by 0.599 in the medium category. Also, 76.32% of students thought that Quizizz media were very interesting, 50% thought that Quizizz media were easily applied, 86.84% thought that Quizizz media accommodate students to compete fairly, and 44.74% thought that Quizizz media were practically applied. Thus, students have a good perception of the Quizziz media accompanied by increased interest in learning.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87365143","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}
Pub Date : 2020-12-01DOI: 10.24114/jpkim.v12i3.21162
A. Gani, Maya Paramitha Mirda, A. Ismayani
Students have different levels of knowledge that can affect learning outcomes. The implementation of learning models in the classroom can also affect student learning outcomes. This study aims to determine how the effect of the implementation of the Auditory Intellectually Repetition (AIR) learning model on redox material in class X SMAN 1 Krueng Barona Jaya. This type of research is descriptive and the approach used is a qualitative approach. This study focuses on several aspects, namely learning outcomes, activities, and students' responses. The subjects in this study were students in class X-MIA1 SMAN 1 Krueng Barona Jaya. Data collection tools used were student activity observation sheets, evaluation questions, and student response questionnaires. Data were collected using these three tools and then the percentage of the results was seen. The results of the analysis of students' learning completeness were obtained that 80% of students had completed and 20% of students did not complete. The results of observations of students 'activities were seen to have developed from the first meeting, namely 92.11% to 93.75% at the second meeting, while the results of the students' responses were obtained an average percentage of 85.56%. This shows that the implementation of the AIR learning model received a positive response from students and can be used as an effective model to use in redox material.
{"title":"Implementation auditory-intellectually-repetition of redox material to improve learning outcomes in class X high school students 1 Krueng Barona Jaya","authors":"A. Gani, Maya Paramitha Mirda, A. Ismayani","doi":"10.24114/jpkim.v12i3.21162","DOIUrl":"https://doi.org/10.24114/jpkim.v12i3.21162","url":null,"abstract":"Students have different levels of knowledge that can affect learning outcomes. The implementation of learning models in the classroom can also affect student learning outcomes. This study aims to determine how the effect of the implementation of the Auditory Intellectually Repetition (AIR) learning model on redox material in class X SMAN 1 Krueng Barona Jaya. This type of research is descriptive and the approach used is a qualitative approach. This study focuses on several aspects, namely learning outcomes, activities, and students' responses. The subjects in this study were students in class X-MIA1 SMAN 1 Krueng Barona Jaya. Data collection tools used were student activity observation sheets, evaluation questions, and student response questionnaires. Data were collected using these three tools and then the percentage of the results was seen. The results of the analysis of students' learning completeness were obtained that 80% of students had completed and 20% of students did not complete. The results of observations of students 'activities were seen to have developed from the first meeting, namely 92.11% to 93.75% at the second meeting, while the results of the students' responses were obtained an average percentage of 85.56%. This shows that the implementation of the AIR learning model received a positive response from students and can be used as an effective model to use in redox material.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83195701","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}
Pub Date : 2020-12-01DOI: 10.24114/jpkim.v12i3.21159
Fathia Namira, W. Azura, Ayu Miranda, H. Nisa, S. Silaban, Retno Dwi Suyanti, A. Darmana
Practical activities play an important role in science education. Through it, students develop a deeper understanding of standing theoretical concepts, skill, utilization of technology, and methods for investigation with direct manipulation of related materials. Effective use of laboratories is one of the requirements in learning chemistry, especially in experiment material. However, problems that are often encountered in learning in the laboratory are laboratory management which includes the procurement process, application process, and the maintenance process. The research method used was observation, document recording and interview with all chemistry teachers and students at Labuhan Deli Senior High School and Percut Sei Tuan Senior High School, District of Deli Serdang, Indonesia. Stages in the research of this are (1) observation based on National Education Standards, (2) observation of chemistry experiments implementation, (3) observation of constraint and problems laboratory at school, and (4) determine alternative solution. The result showed that area of chemistry laboratory has suitable with BSNP standart, but the standard of facilities and infrastructure category reference scale (PAP), showed less category results. So the settlement by researchers on this problem is to do a simple practicum that can be done in an open space or using the technology (virtual laboratory) to increase the students’ skill in industrial 4.0.
实践活动在科学教育中占有重要地位。通过对相关材料的直接操作，学生对现有的理论概念、技能、技术的运用和调查方法有了更深的理解。有效地利用实验室是学习化学，尤其是实验材料的要求之一。然而，在实验室学习中经常遇到的问题是实验室管理，包括采购过程、应用过程和维护过程。本研究采用观察法、文献法和访谈法，对印度尼西亚Deli Serdang地区Labuhan Deli高中和Percut Sei Tuan高中的所有化学教师和学生进行了调查。这一研究的阶段是(1)基于国家教育标准的观察，(2)化学实验实施的观察，(3)学校约束和问题实验室的观察，(4)确定替代解决方案。结果表明，化学实验室区域符合BSNP标准，但设施和基础设施类别参考量表(PAP)标准的类别结果较少。因此，研究人员对这个问题的解决方案是做一个简单的实习，可以在一个开放的空间或使用技术(虚拟实验室)来提高学生在工业4.0中的技能。
{"title":"Analysis of constraints and innovation of chemistry experiment implementation in high school in Deli Serdang, Indonesia","authors":"Fathia Namira, W. Azura, Ayu Miranda, H. Nisa, S. Silaban, Retno Dwi Suyanti, A. Darmana","doi":"10.24114/jpkim.v12i3.21159","DOIUrl":"https://doi.org/10.24114/jpkim.v12i3.21159","url":null,"abstract":"Practical activities play an important role in science education. Through it, students develop a deeper understanding of standing theoretical concepts, skill, utilization of technology, and methods for investigation with direct manipulation of related materials. Effective use of laboratories is one of the requirements in learning chemistry, especially in experiment material. However, problems that are often encountered in learning in the laboratory are laboratory management which includes the procurement process, application process, and the maintenance process. The research method used was observation, document recording and interview with all chemistry teachers and students at Labuhan Deli Senior High School and Percut Sei Tuan Senior High School, District of Deli Serdang, Indonesia. Stages in the research of this are (1) observation based on National Education Standards, (2) observation of chemistry experiments implementation, (3) observation of constraint and problems laboratory at school, and (4) determine alternative solution. The result showed that area of chemistry laboratory has suitable with BSNP standart, but the standard of facilities and infrastructure category reference scale (PAP), showed less category results. So the settlement by researchers on this problem is to do a simple practicum that can be done in an open space or using the technology (virtual laboratory) to increase the students’ skill in industrial 4.0.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78292972","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}
Pub Date : 2020-12-01DOI: 10.24114/jpkim.v12i3.21186
H. Herlinawati, B. Buchari, M. B. Amran
Separation of Sb (V) and Sb (III) antimony compounds using anion exchange chromatography technique have been done. To obtain the separation of Sb (V) and Sb (III) antimony compounds which is good in this study have been studied several parameters of separation in anion exchange chromatography technique. Parameters that influence the process of separation of Sb (V) and Sb (III) antimony compounds is the concentration and pH of the mobile phase (eluent) have been evaluated. The separation of Sb (V) and Sb (III) antimony compounds is good and optimum obtained using an eluent 200 mM phosphate buffer at pH 7 with a flow rate of 1 mL/min. Based on the optimum conditions for the separation of Sb (V) and Sb (III) antimony compounds with anion exchange chromatography method has generated value the capacity factor (k ') Sb (V) and Sb (III) obtained are respectively 1.77 and 3.01. While the value of selectivity (α), Number of theoretical plates (N) and Resolution (Rs) obtained are respectively 1.70; 369.48; and 1.48.
{"title":"Separation of Sb (V) and Sb (III) antimony compounds using anion exchange chromatography technique","authors":"H. Herlinawati, B. Buchari, M. B. Amran","doi":"10.24114/jpkim.v12i3.21186","DOIUrl":"https://doi.org/10.24114/jpkim.v12i3.21186","url":null,"abstract":"Separation of Sb (V) and Sb (III) antimony compounds using anion exchange chromatography technique have been done. To obtain the separation of Sb (V) and Sb (III) antimony compounds which is good in this study have been studied several parameters of separation in anion exchange chromatography technique. Parameters that influence the process of separation of Sb (V) and Sb (III) antimony compounds is the concentration and pH of the mobile phase (eluent) have been evaluated. The separation of Sb (V) and Sb (III) antimony compounds is good and optimum obtained using an eluent 200 mM phosphate buffer at pH 7 with a flow rate of 1 mL/min. Based on the optimum conditions for the separation of Sb (V) and Sb (III) antimony compounds with anion exchange chromatography method has generated value the capacity factor (k ') Sb (V) and Sb (III) obtained are respectively 1.77 and 3.01. While the value of selectivity (α), Number of theoretical plates (N) and Resolution (Rs) obtained are respectively 1.70; 369.48; and 1.48.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77222970","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}
Pub Date : 2020-12-01DOI: 10.24114/jpkim.v12i3.21161
Havizhah Havizhah, M. Muhaimin, Damris Muhammad
This study aims to see the effect of the cooperative learning model type of group investigation and adversity quotient of students on the mastery of chemical concepts on salt hydrolysis. This research is a quasi-experimental research with a control group posttest only design using a 2 × 3 factorial design. The research was conducted in class IX MIA SMA N 10 Batanghari with two classes. Sampling was done by total sampling. Data collection techniques are questionnaires, tests and documentation. The test instrument was used to determine the value of mastery of chemical concepts on salt hydrolysis. Meanwhile, the questionnaire instrument was used to determine the level of adversity quotient of students. Data processing used two-way ANOVA. The results showed that the cooperative learning model group Investigation type and the adversitiy quotient of the climber type students had high mastery of chemical concepts, but there was no interaction between the group investigation type learning model and the adversity quotient on the mastery of chemical concepts on salt hydrolysis due to the learning model and adversity quotient influence on mastery of chemical concepts independently. Based on the results of the study, it can be concluded: (1) there is an effect of the group investigation type cooperative learning model on the mastery of chemical concepts (2) there is an effect of students adversity quotient on chemical concept mastery (3) there is no interaction between the cooperative learning model group investigation type with students' adversity quotient on mastery of chemical concepts in salt hydrolysis.
本研究旨在观察小组调查合作学习模式和逆境商对学生对盐水解化学概念掌握的影响。本研究为准实验研究，采用2 × 3因子设计，采用对照组后验设计。研究在IX类MIA SMA n10 Batanghari中进行，分为两个类。抽样是通过总抽样完成的。数据收集技术包括问卷调查、测试和文档。该测试仪器用于测定对盐水解化学概念的掌握值。同时，采用问卷调查法测定学生的逆境商水平。数据处理采用双向方差分析。结果表明，合作学习模式、小组调查型和逆境商对攀爬型学生化学概念的掌握程度较高，但由于学习模式和逆境商对化学概念的独立掌握有影响，小组调查型学习模式和逆境商对盐水解化学概念的掌握没有交互作用。根据研究结果，可以得出:(1)小组调查型合作学习模式对化学概念的掌握有影响;(2)学生逆境商对化学概念的掌握有影响;(3)小组调查型合作学习模式与学生逆境商对盐水解化学概念的掌握没有交互作用。
{"title":"Effect of cooperative learning model type of group investigation and adversity quotient of students on mastery of chemical concepts on salt hydrolysis material","authors":"Havizhah Havizhah, M. Muhaimin, Damris Muhammad","doi":"10.24114/jpkim.v12i3.21161","DOIUrl":"https://doi.org/10.24114/jpkim.v12i3.21161","url":null,"abstract":"This study aims to see the effect of the cooperative learning model type of group investigation and adversity quotient of students on the mastery of chemical concepts on salt hydrolysis. This research is a quasi-experimental research with a control group posttest only design using a 2 × 3 factorial design. The research was conducted in class IX MIA SMA N 10 Batanghari with two classes. Sampling was done by total sampling. Data collection techniques are questionnaires, tests and documentation. The test instrument was used to determine the value of mastery of chemical concepts on salt hydrolysis. Meanwhile, the questionnaire instrument was used to determine the level of adversity quotient of students. Data processing used two-way ANOVA. The results showed that the cooperative learning model group Investigation type and the adversitiy quotient of the climber type students had high mastery of chemical concepts, but there was no interaction between the group investigation type learning model and the adversity quotient on the mastery of chemical concepts on salt hydrolysis due to the learning model and adversity quotient influence on mastery of chemical concepts independently. Based on the results of the study, it can be concluded: (1) there is an effect of the group investigation type cooperative learning model on the mastery of chemical concepts (2) there is an effect of students adversity quotient on chemical concept mastery (3) there is no interaction between the cooperative learning model group investigation type with students' adversity quotient on mastery of chemical concepts in salt hydrolysis.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72889032","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}
Pub Date : 2020-08-03DOI: 10.24114/jpkim.v12i2.19406
Rini Alfiahas, A. Asrial, Damris Muhammad
The acid and base concepts are fundamental in understanding chemistry taught at senior high schools. The chemistry concepts are generally abstract and sometimes complex. Teachers are required find ways that lead to improve their students understanding. This study aimed to look at the effect of portfolio-based learning model and self regulated learning on students creative thinking skills on acid and base teaching materials. Data of students creative thinking skills were collected with test and self-regulated learning with questionnaire. The data analysed with two-way ANOVA shows that the portfolio-based learning models and students self-regulated learning have a positive effect on the students' creative thinking skills in the material taught. However, both are independent and do not interact each others in affecting the student creative thinking skills. Keywords: Acid and base, Creative thinking skills, Portfolio based learning model, Self regulated learning
{"title":"The effect of portfolio-based learning models and self-regulated learning on student’s creative thinking skills on acid and base materials","authors":"Rini Alfiahas, A. Asrial, Damris Muhammad","doi":"10.24114/jpkim.v12i2.19406","DOIUrl":"https://doi.org/10.24114/jpkim.v12i2.19406","url":null,"abstract":"The acid and base concepts are fundamental in understanding chemistry taught at senior high schools. The chemistry concepts are generally abstract and sometimes complex. Teachers are required find ways that lead to improve their students understanding. This study aimed to look at the effect of portfolio-based learning model and self regulated learning on students creative thinking skills on acid and base teaching materials. Data of students creative thinking skills were collected with test and self-regulated learning with questionnaire. The data analysed with two-way ANOVA shows that the portfolio-based learning models and students self-regulated learning have a positive effect on the students' creative thinking skills in the material taught. However, both are independent and do not interact each others in affecting the student creative thinking skills. Keywords: Acid and base, Creative thinking skills, Portfolio based learning model, Self regulated learning","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83311395","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}
Pub Date : 2020-04-10DOI: 10.24114/jpkim.v12i1.17744
G. Rahman, Rizki Fitriani Nasution, Alfi Rizkina Lubis, Putri Novira, Lusyana Rahman, Ester Hartina Ria Sinaga, Puan Ibna Maghfirah Thaharah, Sri Nur Afrida, R. Suyanti, A. Darmana, S. Silaban
The laboratory is a place to train students' skills in conducting demonstration, experimental and scientific development practices. The provision of complete laboratory tools and materials and good laboratory management will make learning chemistry run optimally, but some high schools still do not meet the standards of facilities and infrastructure in the laboratory. Therefore, the researcher tries to collect the problems and constraints in the implementation of the practicum and find alternative solutions to the problem solving based on literature review and expert opinion. This research is a qualitative study which is a case study research in several high schools in Medan. The instruments in this study were student questionnaire, teacher questionnaire, principal questionnaire and observation sheet using Likert scale analyzed using the percentage formula. the results of the analysis of case studies conducted in a number of high schools in Medan, it can be concluded that, the area of chemistry laboratories in several schools in Medan meets BSNP standards, but there are still science laboratories used for chemical laboratories. The results of the analysis of equipment and materials that support the implementation of the practicum after the presentation of X1 schools 76.36%, X2 schools 65.67% and X3 schools 87.27%. Keywords: Chemistry laboratory; Practicum; Equipment
{"title":"Analysis of constraints and alternative solutions to the implementation of chemical practicums in several high schools in Medan","authors":"G. Rahman, Rizki Fitriani Nasution, Alfi Rizkina Lubis, Putri Novira, Lusyana Rahman, Ester Hartina Ria Sinaga, Puan Ibna Maghfirah Thaharah, Sri Nur Afrida, R. Suyanti, A. Darmana, S. Silaban","doi":"10.24114/jpkim.v12i1.17744","DOIUrl":"https://doi.org/10.24114/jpkim.v12i1.17744","url":null,"abstract":"The laboratory is a place to train students' skills in conducting demonstration, experimental and scientific development practices. The provision of complete laboratory tools and materials and good laboratory management will make learning chemistry run optimally, but some high schools still do not meet the standards of facilities and infrastructure in the laboratory. Therefore, the researcher tries to collect the problems and constraints in the implementation of the practicum and find alternative solutions to the problem solving based on literature review and expert opinion. This research is a qualitative study which is a case study research in several high schools in Medan. The instruments in this study were student questionnaire, teacher questionnaire, principal questionnaire and observation sheet using Likert scale analyzed using the percentage formula. the results of the analysis of case studies conducted in a number of high schools in Medan, it can be concluded that, the area of chemistry laboratories in several schools in Medan meets BSNP standards, but there are still science laboratories used for chemical laboratories. The results of the analysis of equipment and materials that support the implementation of the practicum after the presentation of X1 schools 76.36%, X2 schools 65.67% and X3 schools 87.27%. Keywords: Chemistry laboratory; Practicum; Equipment","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83253700","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}
Pub Date : 2019-12-10DOI: 10.20961/JPKIM.V8I2.29028
Faradilla Prima Hesti, S. Ariani, Bakti Mulyani
Penelitian ini bertujuan untuk meningkatkan: (1) keterampilan generik sains dalam materi Kelarutan dan Hasil Kali Kelarutan (Ksp) melalui implementasi pembelajaran kimia Kelas XI IPA SMA Negeri 2 Sukoharjo Tahun Pelajaran 2017/2018 dengan model pembelajaran Discovery Learning; (2) prestasi belajar dalam materi Kelarutan dan Hasil Kali Kelarutan (Ksp) melalui implementasi pembelajaran kimia Kelas XI IPA SMA Negeri 2 Sukoharjo Tahun Pelajaran 2017/2018 dengan model pembelajaran Discovery Learning. Penelitian ini merupakan penelitian tindakan kelas yang dilaksanakan dalam 2 siklus pada kelas XI IPA 2 SMA Negeri 2 Sukoharjo. Tahapan siklus terdiri atas tahap perencanaan, pelaksanaan tindakan, observasi dan refleksi pada setiap siklusnya. Subyek penelitian adalah siswa kelas XI IPA 2 SMA Negeri 2 Sukoharjo. Data dan sumber data yang digunakan diperoleh dari guru, siswa dan dokumentasi. Teknik pengumpulan data meliputi tes, observasi dan angket. Berdasarkan hasil penelitian disimpulkan bahwa model pembelajaran Discovery Learning dapat meningkatkan: keterampilan generik sains pada materi kelarutan dan hasil kali kelarutan. Hal tersebut terlihat pada kenaikan prasiklus sebesar 29% menjadi menjadi 50% pada siklus I dan 72% pada siklus II. (2) Prestasi belajar siswa pada materi kelarutan dan hasil kali kelarutan (aspek pengetahuan pada siklus I adalah 53% meningkat menjadi 83% pada siklus II, aspek sikap presentase ketercapaian siswa di siklus I 96% dan meningkat pada siklus II menjadi 100%, pada aspek keterampilan siklus I ketercapaian ketuntasan siswa mencapai nilai maksimum yaitu 100%).
这个循环的各个阶段包括计划、行动、观察和思考的各个周期。研究对象是SMA SMA SMA 2的大二学生Sukoharjo。所使用的数据和资源来自教师、学生和文件。数据收集技术包括测试、观察和量表。根据研究结果，探索学习模式可以提高:科学对溶剂物质的一般技能和再溶剂的结果。这在I周期的前期增加了29%，在I周期中增加了50%，在II周期中增加了72%。(2)学生的学习成就物质溶解度次(溶解度和结果方面的知识我是53%增至83%的周期循环,态度方面的百分比ketercapaian周期我96%的学生在II周期增至100%,在技能方面我ketercapaian周期ketuntasan学生达到最大值,即100%)。
{"title":"Penerapan Model Discovery Learning pada Materi Kelarutan dan Hasil Kali Kelarutan untuk Meningkatkan Prestasi Belajar dan Keterampilan Generik Sains Kelas XI IPA SMA Negeri 2 Sukoharjo Tahun Pelajaran 2017/2018","authors":"Faradilla Prima Hesti, S. Ariani, Bakti Mulyani","doi":"10.20961/JPKIM.V8I2.29028","DOIUrl":"https://doi.org/10.20961/JPKIM.V8I2.29028","url":null,"abstract":"Penelitian ini bertujuan untuk meningkatkan: (1) keterampilan generik sains dalam materi Kelarutan dan Hasil Kali Kelarutan (Ksp) melalui implementasi pembelajaran kimia Kelas XI IPA SMA Negeri 2 Sukoharjo Tahun Pelajaran 2017/2018 dengan model pembelajaran Discovery Learning; (2) prestasi belajar dalam materi Kelarutan dan Hasil Kali Kelarutan (Ksp) melalui implementasi pembelajaran kimia Kelas XI IPA SMA Negeri 2 Sukoharjo Tahun Pelajaran 2017/2018 dengan model pembelajaran Discovery Learning. Penelitian ini merupakan penelitian tindakan kelas yang dilaksanakan dalam 2 siklus pada kelas XI IPA 2 SMA Negeri 2 Sukoharjo. Tahapan siklus terdiri atas tahap perencanaan, pelaksanaan tindakan, observasi dan refleksi pada setiap siklusnya. Subyek penelitian adalah siswa kelas XI IPA 2 SMA Negeri 2 Sukoharjo. Data dan sumber data yang digunakan diperoleh dari guru, siswa dan dokumentasi. Teknik pengumpulan data meliputi tes, observasi dan angket. Berdasarkan hasil penelitian disimpulkan bahwa model pembelajaran Discovery Learning dapat meningkatkan: keterampilan generik sains pada materi kelarutan dan hasil kali kelarutan. Hal tersebut terlihat pada kenaikan prasiklus sebesar 29% menjadi menjadi 50% pada siklus I dan 72% pada siklus II. (2) Prestasi belajar siswa pada materi kelarutan dan hasil kali kelarutan (aspek pengetahuan pada siklus I adalah 53% meningkat menjadi 83% pada siklus II, aspek sikap presentase ketercapaian siswa di siklus I 96% dan meningkat pada siklus II menjadi 100%, pada aspek keterampilan siklus I ketercapaian ketuntasan siswa mencapai nilai maksimum yaitu 100%).","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84093974","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}
Pub Date : 2019-12-07DOI: 10.24114/jpkim.v11i3.15779
S. Silaban, M. Simorangkir, S. Gaffar, I. Maksum, T. Subroto
Many proteins produced in E. coli accumulate in inclusion bodies. This study aims to detect the role of temperature in reducing the formation of inclusion bodies during recombinant human prethrombin-2expressed in E. coli BL21 (DE3) Arctic Express host. In this study, we created a host growth curve to find out the right time to add an inducer. The inducer used in our experiment was IPTG 0.1 mM. The fermentation process use a temperature of 12°C and 22°C. The results showed that recombinant human prethrombin-2 was successfully expressed as protein soluble using an optimum temperature of 12°C in E. coli BL21 (DE3) Arctic Express. It was indicated from the 63kDa protein band obtained from the soluble fraction on SDS-PAGE. The higher temperature of fermentation increased the amount of protein in the insoluble fraction due. It concluded that the fermentation temperature affect the rate of prethrombin-2 expression. Keywords: E. coli BL21(DE3) ArcticExpress, prethrombin-2, soluble, temperature
{"title":"Temperature effect on expression of recombinant human prethrombin-2 in Escherichia coli BL21(DE3) ArcticExpress","authors":"S. Silaban, M. Simorangkir, S. Gaffar, I. Maksum, T. Subroto","doi":"10.24114/jpkim.v11i3.15779","DOIUrl":"https://doi.org/10.24114/jpkim.v11i3.15779","url":null,"abstract":"Many proteins produced in E. coli accumulate in inclusion bodies. This study aims to detect the role of temperature in reducing the formation of inclusion bodies during recombinant human prethrombin-2expressed in E. coli BL21 (DE3) Arctic Express host. In this study, we created a host growth curve to find out the right time to add an inducer. The inducer used in our experiment was IPTG 0.1 mM. The fermentation process use a temperature of 12°C and 22°C. The results showed that recombinant human prethrombin-2 was successfully expressed as protein soluble using an optimum temperature of 12°C in E. coli BL21 (DE3) Arctic Express. It was indicated from the 63kDa protein band obtained from the soluble fraction on SDS-PAGE. The higher temperature of fermentation increased the amount of protein in the insoluble fraction due. It concluded that the fermentation temperature affect the rate of prethrombin-2 expression. Keywords: E. coli BL21(DE3) ArcticExpress, prethrombin-2, soluble, temperature","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74303786","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}
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