cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
jpkim.pps@unimed.ac.id
Editorial Address
Jl. William Iskandar Psr. V Medan Estate, Medan-Indonesia
Location
Kota medan,
Sumatera utara
INDONESIA
Jurnal Pendidikan Kimia (JPKim)
Published by Universitas Negeri Medan
ISSN : 20853653     EISSN : 25493116     DOI : 10.24114
Core Subject : Science, Education, Social,
Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science
Jurnal Pendidikan Kimia (JPKim) yang dikelola Program Pascasarjana Universitas Negeri Medan terbit 3 kali setahun, yakni bulan April, Agustus dan Desember. JPKim menerbitkan artikel ilmiah hasil-hasil penelitian pendidikan kimia dan kimia fundamental. JPKim juga menerbitkan artikel Review terkait Pendidikan Kimia dan Kimia.
Arjuna Subject : -
Articles 12 Documents
 1   2 
Search results for , issue "Vol 15, No 2 (2023): August" : 12 Documents clear
Crystal guava (Psidium guajava L. “Crystal”) treated with gibberelic acid (GA3) : Evaluation of in vitro antioxidant capacities Fajar Sumi Lestari; Ricson Pemimpin Hutagaol; Srikandi Srikandi
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.41780

Abstract

Free radicals can cause many diseases, such as cancer. Antioxidant is a compound that could scavenge free radicals. One of the natural source antioxidants is guava. The application of gibberellic acid (GA3) is known to affect the physicochemical properties and antioxidant content of the fruit. The goals of this research were to investigate the antioxidant activity of skin, flesh and fruit of crystal guava were given additional GA3 treatment with concentration 0; 60; 120; 180; 240; and 300 ppm by determining the value of the Antioxidant Activity Index (AAI) using DPPH; evaluate the total phenolic content (TPC), ferric reducing antioxidant power (FRAP) and physicochemical properties; analyse the correlation between the TPC with AAI DPPH by Pearson’s method. Extraction was performed by the maceration method using acetone 50% mixed with a magnetic stirrer for 1 h. Determination of AAI DPPH, FRAP and the TPC was performed by UV-Visible spectrophotometry. TPC in the flesh and fruit fractions tended to increase and FRAP values in all fractions decreased with GA3 application. The highest TPC and FRAP was given by the G3 treatment on the skin fraction and G0 treatment on the skin fraction. The highest AAI in all fractions was given by the G3 treatment. The TPC was significantly positively correlated with the AAI DPPH of the flesh and fruit fraction extracts (0.250 ≤ r ≤ 0.880), and the skin fraction extracts showed a strong negative correlation between TPC and AAI DPPH (-0.813 < r < -0.973).Keywords: Antioxidant activity; DPPH; FRAP; Gibberellic acid; Psidium guajava
Molecular docking analysis of six major compounds from sweet basil (Ocimum basilicum L.) extract as potential anti-hypertension therapy Bayu Cakra Buana; Iksen Iksen; Kasta Gurning
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.43617

Abstract

Hypertension is an abnormally high blood pressure condition that is the leading cause of preventable cardiovascular disease, chronic kidney disease, and cognitive impairment. In the case of hypertension, repressing the Angiotensin-Converting Enzyme (ACE) expression has been shown to be an effective method of controlling hypertension by inhibiting the conversion of angiotensin I to angiotensin II. Captopril is the most commonly used ACE inhibitor. It simultaneously inhibits the conversion of angiotensin I to the potent vasoconstrictor angiotensin II and the vasodilator peptide bradykinin. Sweet basil (Ocimum basilicum L.) on the other hand, is used in traditional Indian and Chinese medicine to treat a variety of diseases, including hypertension. The study aimed attempts to investigate the potency of 6 major compounds found in sweet basil (Ocimum basilicum L.) extract, as an anti-hypertension therapy. The analysis demonstrates that Ocimum basilicum L., extract is effective as an anti-hypertension therapy because it contains several compounds that may interact with ACE and inhibit its activity. The molecular docking analysis and drug-likeness prediction indicate that camphor could be a potential drug candidate because it does not violate the Lipinski rule, has a high Gastrointestinal (GI) absorption, a high affinity to interact with ACE, and a similar interaction site to the ACE-Captopril interaction.Keywords: ACE; Holly basil; Hypertension; Molecular docking
21st Century chemistry teacher: Analysis of TPACK of pre-service chemistry teachers in teachers college Friska Juliana Purba; Kelly Sinaga; Debora Sitinjak; Candra Y Tahya
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.43788

Abstract

This research is aimed to analyze chemistry pre-service teachers' profile of the TPACK (Technology Pedagogy and Content Knowledge) competencies in Teachers College. The method used in this study was a mixed method using TPACK’s questionnaire and interview. This study revealed that Content Knowledge (CK), Technology Knowledge (TK), Pedagogy Knowledge (PK), Pedagogy Content Knowledge (PCK), and Technology Pedagogy Knowledge (TPK) components of TPACK of pre-service teachers are excellent. The Technology Content Knowledge (TCK) component needs to be improved throughout training courses that enabled the pre-service teacher to utilize, design, and apply various chemistry-based computer applications. The component of TPACK will continue to develop with the support of institutions and teaching experience. Strengthening the components of TPACK is important for a chemistry teacher to embrace 21st century learning.Keywords: Chemistry pre-sevice teacher; 21st century learning; TPACK 
Chemistry teacher and pre-service chemistry teacher views: Can social media be used as chemistry learning media? Ari Syahidul Shidiq; Sri Yamtinah; Hayuni Retno Widarti
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.43359

Abstract

Chemistry learning should be able to integrate contextual chemistry problems and present the sophistication of 21st-century learning technology. As a product of 21st-century technology, social media can be used as chemistry learning media. Therefore, this study aims to investigate the views of chemistry teachers and pre-service chemistry teachers toward the potential use of social media as chemistry learning media. The Purposed-designed survey method that involved 76 chemistry teachers and 109 pre-service chemistry teachers as respondents was used in this study. A total of 40 question items were developed and distributed online using a Google form to respondents. Based on the results of the survey conducted, it is known that during online and offline chemistry learning, respondents are accustomed to using YouTube as chemistry learning media. In addition, Instagram is the social media most widely owned by pre-service chemistry teachers, while Facebook is the social media most commonly owned by chemistry teachers. Other results reveal that most respondents have the same screen time, more than 4 hours daily. This screen time is used by respondents for entertainment and looking for news information on social media. With this long screen time not used for learning, it can be a promising opportunity to use social media as chemistry learning media. This study is expected to be a reference for developing social media-based chemistry learning to increase student motivation and achievement.Keywords: Chemistry teacher; Learning media; Pre-service chemistry teacher; Social media; Views
Development of modules macromolecules based on local natural resources of Maluku in project-based learning for XII grade senior high school students Vivian Salelatu; Eli Rohaeti
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.45061

Abstract

This research aims to develop chemistry learning modules based on local natural resources in Maluku in project-based learning on macromolecular material class XII IPA SMA. This research refers to the 4-D development model by Thiagarajan, Semmel, and Semmel, which includes the stages of define, design, develop, and disseminate. This learning module has gone through the validation stage by expert validators. It has gone through field trials and has been revised by developers to produce a valid and practical learning module. The results of this study are: (1) validity assessment by one media expert and one material expert is in the very valid category with an average score from material experts of 4.49 and an average score from media experts of 4.68; (2) the small group trial to 9 students of class XII IPA 1 SMAN 6 Ambon obtained a percentage of 93.6% in the very practical category; (3) Field trials to 30 students of class XII IPA 3 SMAN 12 Ambon resulted in a percentage of 90.2% with a very practical category. The response of five chemistry teachers to the developed module also resulted in a percentage of 85.4% in the very practical category. In conclusion, the chemistry learning module based on local natural resources in Maluku in project-based learning developed with a 4-D model is valid, practical, and It can be used as teaching materials in school.Keywords: Local natural resources; Module development; Macromolecules; Project-based learning; 4D model 
The effect of methanol flow rate and repeated use on amberlyst catalyst characteristics in palm fatty acid distillate (PFAD) esterification reaction Dian Wardana; Eddiyanto Eddiyanto; Nurfajriani Nurfajriani; Saharman Gea
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.43668

Abstract

Palm fatty acid distillate (PFAD) is a waste from cooking oil which is rich in free fatty acids (FFA). The high FFA content in PFAD allows PFAD to be processed into a renewable and economically valuable energy source, namely biodiesel through an esterification process using methanol with the help of an amberlyst catalyst. This study aims to see how the effect of variations in flow rates on the conversion of PFAD to biodiesel which takes place in a continuous reactor and to see the effect of repeated use of catalysts at optimum conditions on the conversion rate. The results showed that the optimum conditions were obtained with a methanol flow rate of 2 ml/minute. The flow rate of methanol above 2 ml/minute actually inhibits the reaction process. The repeated use of the catalyst reduces the availability of active sites and increases the presence of impurities and reduces the thermal stability of the catalyst at high temperatures.Keywords: Amberlist; Biodiesel; Esterification; PFAD
The effectiveness of flipped classroom on scientific literacy and critical thinking improvement Nur Wijayanto; Abdul Gani; M. Hasan; Asri Widowati
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.45523

Abstract

Scientific literacy has a vital role in supporting 21st-century skills. Good literacy skills can directly affect students' thinking abilities, which makes them more creative in solving problems. The low ability of students' scientific literacy and critical thinking is still a problem in the world of education. The application of appropriate learning models and methods can improve student learning outcomes. The goal of this study was to see how the flipped classroom learning model affected the literacy and critical thinking skills of SMAN 3 Yogyakarta grade XI students. The pretest-posttest control design experimental method was carried out on a total of 35 samples from a population of 213 students. The results of the Mann Whitney and Wilcoxon tests obtained a significance of less than 0.05 in both the control and experimental groups for pretest and posttest values. The use of the flipped classroom method effectively improved scientific literacy and critical thinking skill. There is a strong relationship between critical thinking skills and scientific literacy.Keywords: Critical thinking; Flipped classroom model; Literacy science; 21st century skill
Based E-LKPD development based problem based learning to improve students' creative thinking skills on acid-base material Mariyana Mariyana; Wilda Syahri; Haryant Haryant
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.48264

Abstract

Students' creative thinking skills tend to be lowas found in SMAN 2 Muaro Jambi. Hal this is due to students' low learning interest in chemistry subjects. Therefore the teacher must be able to create creative learning such as developing a teaching media. This study aims to develop media-based E-LKPD Problem Based Learning to be able to improve students' creative thinking skills on acid-base material. The type of development research carried out is Research and Development using a combination approach, namely between qualitative and quantitative approaches. The qualitative approach is intended to analyze the development process which will be described in depth about the events that occurred during the research, while the quantitative approach is used to analyze the results and path analysis. Electronic student worksheets (E-LKPD) which were developed based on problem-based learning models using Page flip Professional 3D software using a 4-D model development design. In this development research, the last stage is to test the effectiveness of the product using type experimental research design equivalent time serises design so it uses one experimental class by measuring the value posttest each meeting 3 times using the E-LKPD media that has been developed in the format pfprj. Based on the results of the study that there are differences in learning out comes without using the media and when using the media, that is obtained a difference of 11.56. Every meeting there is an increase of 5 - 7 average score so that the media developed is effective for improving students' creative thinking skills.Keywords: Acid-base material; Creative thinking skills; E-LKPD; Problem based learning
Development of powtoon web apps assisted colloid system material animation video to increase students' interest in learning Sabilla Wulan Sadewi; Agus Kamaludin
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.46666

Abstract

Colloidal material is theoretical and abstract, making it less attractive to students studying it. This study aims to develop an animated video for colloidal system material using the Powtoon web app and test its quality. This research method is Research and Development (R&D) using the ADDIE development model. Product assessment is carried out using product quality assessment sheets and student responses. Data analysis techniques use qualitative and quantitative analysis techniques described in descriptive form. The results of the evaluation of animated videos by material experts obtained an ideal percentage of 98.1% in the very good category, media experts 90% in the very good category, reviewers 94.8% in the very good variety, and students responded positively with a percentage of 93.4%. Based on the assessment results, it was concluded that the animated video developed could be used as an alternative learning medium in colloidal system material to increase students' interest in learning.Keywords: Animated video; Colloid system; Interest in learning; Powtoon
Validity of instruments for assessment of scientific literacy and critical thinking of students based on multiple intelligence in acid-base material Muji Rahayu Wigati; Asmadi M. Noer; Lenny Anwar
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.43681

Abstract

This research aims to create an assessment tool to evaluate students' scientific reading comprehension and critical thinking ability based on multiple intelligences on acid-base materials and to determine the validity of this study rating tool. The research methodology uses the Borg and Gal research and development model. This research phase continues into the development phase. The assessment instrument developed in this study consists of sixteen items of description test questions that refer to science literacy indicators consisting of four indicators are science as a body of knowledge; science as a way of investigation; science as a way of thinking; and the interaction of science, technology and society. Then the assessment instrument refers to critical thinking which consists of five indicators: providing a simple explanation, building basic skills, inference, providing further explanation, and developing strategies and tactics. This assessment instrument is based on multiple intelligences consisting of five types of intelligence: logical-mathematical, verbal-linguistic, visual-spatial, rhythmic-musical, and naturalistic. The validation of this assessment instrument is carried out by five validators. Validation by material experts is measured using the Guttman scale. Validity according to experts, namely aspects of material, language, and construction, obtained on average expert validation ranges from 90,33 – 94,7% and 16 questions are declared valid. Assessment instruments have been developed to be useful as a measure of a student's creative thinking ability.Keywords: Acid-base; Critical thinking; Instrument for assessment; Multiple intelligences; Science literacy

Page 1 of 2 | Total Record : 12

 1   2 

Filter by Year

2023 2023


Reset
Filter By Issues
All Issue Vol 16, No 1 (2024): April Vol 15, No 3 (2023): December Vol 15, No 2 (2023): August Vol 15, No 1 (2023): April Vol 14, No 3 (2022): December Vol 14, No 2 (2022): August Vol 14, No 1 (2022): April Vol 13, No 3 (2021): December Vol 13, No 2 (2021): August Vol 13, No 1 (2021): April Vol 12, No 3 (2020): December Vol 12, No 2 (2020): August Vol 12, No 1 (2020): April Vol 11, No 3 (2019): December Vol 11, No 2 (2019): August Vol 11, No 1 (2019): April Vol 10, No 3 (2018): December Vol 10, No 2 (2018): August Vol 10, No 1 (2018): April Vol 9, No 3 (2017): Desember Vol 9, No 2 (2017): Agustus Vol 9, No 1 (2017): April Vol 8, No 3 (2016): Desember Vol 8, No 2 (2016): Agustus Vol 8, No 1 (2016): April Vol 7, No 3 (2015): Desember Vol 7, No 2 (2015): Agustus Vol 7, No 1 (2015): April Vol 6, No 3 (2014): Desember Vol 6, No 2 (2014): Agustus Vol 6, No 1 (2014): April More Issue