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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 352 Documents
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Pectin extraction from kepok banana peel waste (Musa acuminata balbisiana) based on green chemistry as a natural preservative Ramandha, Muhammad Eka Putra; Isasih, Widani Darma; Ekaningsih, Astrid
Jurnal Pendidikan Kimia Vol. 16 No. 3 (2024): J. Pendidik. Kim : December 2024
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i3.65160

Abstract

The aims of this research are (1) to extract pectin from kepok banana peels with an environmentally friendly solvent, namely tamarind and (2) to use pectin as a fruit and vegetable preservative. The research methods used were (1) extraction (2) Compound identification test using FTIR (3) Test the effectiveness of pectin's ability to preserve fruit and vegetables. The results of the research showed that the percent yield obtained was 26% and the results of compound identification showed that there were wavelengths corresponding to pectin compounds. The results of testing the effectiveness of pectin's ability to preserve the average result showed that pectin can increase the rotting time of fruit and vegetables. The conclusion from the results of this research is that tamarind can be used as a natural solvent in extracting pectin from kepok banana peels and pectin can be used as a natural preservative for fruit and vegetables.
The Acalypha siamensis leaf as natural dye in eco-print Hapsari, Natalia Diyah; Listyarini, Risnita Vicky; Handoyo, Luisa Diana; Feroniasanti, Yoanni Maria Lauda; Hapsari, Intan Putri; Tan, Andreas Felix; Darmanto, Elsie Gracia Putri; Abuk, Agnes Selfiana Irma; Fitriani, Helena; Krista, Brigitta Della Ocha
Jurnal Pendidikan Kimia Vol. 16 No. 3 (2024): J. Pendidik. Kim : December 2024
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i3.65167

Abstract

The use of synthetic dyes in the textile industry has a negative impact on the environment. Therefore, it is necessary to explore natural dyes that are more environmentally friendly. The aim of this research is to find natural dyes from Acalypha siamensis leaves. In this research, compounds contained in A. siamensis extract were identified using FT-IR and GC-MS instruments, then simulations were carried out of the reactions that occurred between cinnamaldehyde (E), cellulose in cotton, and alum mordant using quantum chemistry software. ORCA 5.0.2 and Visual Molecular Dynamics (VMD). The cinnamaldehyde compound is the main constituent compound in A. siamensis leaf extract. Based on the simulation results: the reaction between cinnamaldehyde (E), cellulose in cotton fabric, and alum mordant is energetically favorable. The reaction simulation results are in line with experimental research, the reaction of cellulose in cotton fabric, alum mordant, and cinnamaldehyde produces a brownish green color. A. siamensis leaves have potential as a dye in eco-prints.
The potential of methanol extract nanoemulsion from gletang flower (Tridax procumbens) as an antibacterial agent against pathogenic bacteria Sriwijayanti, Sriwijayanti; Pradana, Agrin Febrian; Fauji, Fajar Rizki; Farlina, Iin; Situmeang, Boima
Jurnal Pendidikan Kimia Vol. 16 No. 3 (2024): J. Pendidik. Kim : December 2024
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i3.65168

Abstract

Gletang plant is a weed that grows wild and is widely distributed in various places such as rice fields, plantations, and roadsides. Phytochemical screening of gletang flower extract using methanol revealed the presence of secondary metabolites such as alkaloids, flavonoids, steroids, phenols, terpenoids, and tannins. This study aims to formulate a nanoemulsion from the methanol extract of gletang flowers. The extraction was performed by maceration with methanol 96%. The nanoemulsion was characterized by testing its pH, % transmittance, stability, viscosity and particle size using a particle size analyzer. The antibacterial activity was tested against Staphylococcus aureus and Escherichia coliusing the Kirby-Bauer method. The results of pH characterization, % transmittance, stability and viscosity tests met the standards. The particle size analyzer showed that the particle size ranged between 300-1000 nm. The antibacterial activity tests indicated that all three formulations showed activity against the pathogenic bacteria E. coli, with formulation 3 showing the highest activity.
Enhancing critical thinking skill by implementing electronic student worksheets based on guided inquiry in natural science subject for elementary school Setiawan, Mhd Arif; Sriadhi, Sriadhi; Silaban, Saronom
Jurnal Pendidikan Kimia Vol. 16 No. 3 (2024): J. Pendidik. Kim : December 2024
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i3.65170

Abstract

Students’ critical thinking skills currently fall short of the requirements for effective learning in the 21st century, highlighting a need for innovative educational models to help cultivate these skills. This study investigates the enhancement of critical thinking skills among sixth-grade elementary students by using an E-LKPD (electronic student worksheets) grounded in guided inquiry. The study utilized a pretest and posttest non-equivalent control group design, encompassing the full student cohort as the sample. Information regarding students' critical thinking abilities was obtained via a descriptive assessment that satisfied recognized validity and reliability standards. The study results, analyzed with an independent t-test on the N-gain score, show an overall improvement rate of 76.16%, exceeding the 70% threshold for high effectiveness. When analyzed by group, the control group achieved an N-gain of 68.11%, falling in the moderate category, while the experimental group reached an N-gain of 84.21%, showing a huge level of effectiveness. Those results conclude that the guided inquiry-based E-LKPD significantly increased critical thinking skills.
The development of a project-based multimedia and its effectiveness in improving students’ higher order thinking skills about chemistry bonding concept Kholid, Idkhom; Harizon, Harizon; Hasibuan, Muhammad Haris Effendi
Jurnal Pendidikan Kimia Vol. 16 No. 3 (2024): J. Pendidik. Kim : December 2024
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i3.65171

Abstract

This study aimed to develop a learning multimedia which is based on project-based learning (PjBL) and to investigate its effectiveness in improving students’ higher order thinking skills (HOTS) in the concept of chemistry bonding. This study used a research and development (R&D) design involving the method of Lee and Owen which consisted of five stages namely analysis, design, development, implementation, and evaluation (ADDIE) to develop the intended multimedia. The effect of the developed multimedia use on students’ HOTS was investigated using a one group pretest-posttest experimental design with a class of secondary high school students in Jambi city Indonesia. The research of analysis towards the development process showed that the project-based multimedia learning was successfully developed using the ADDIE method. This involved some validation results from some experts that include the chemistry expert and media learning expert who declared that it was valid and feasible to use. The results of experiments showed that the implemented multimedia was effective in increasing the participant students' HOTS after the learning process. The effectiveness was affirmed by the paired t-test (p-value = 0.000<0.05) indicating that there was a significant difference between the students’ HOTS pretest and posttest. This effectiveness was confirmed by the N-gain value of 0.58 which means that the students had experienced 58% HOTS improvement. This can thus be concluded that the developed project-based multimedia was valid and effective in improving students’ HOTS in the concept of chemistry bonding.
Development and validation of an assessment for measuring chemical literacy in chemical equilibrium Pratama, Faiz Ilham; Hariyanti, Sherly; Rohaeti, Eli
Jurnal Pendidikan Kimia Vol. 16 No. 3 (2024): J. Pendidik. Kim : December 2024
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i3.65172

Abstract

Chemical literacy, the ability to integrate the understanding of chemistry with everyday life phenomena, has become a necessary skill for high school students. This skill is aimed at enabling students to develop an understanding of chemistry concepts about the environment, health, and industrial topics. This research focuses on developing and validating a chemical literacy assessment, specifically on chemical equilibrium. Afterward, the assessment was given the name Chemical Equilibrium Literacy Assessment. The development model is based on modified 4D and consists of two sets of 15 questions each. Content validity was measured using the Aiken V equation with seven expert judgments and four answer categories. To assess construct validity, the Pearson equation was used involving 100 respondents. The reliability of the assessment was calculated using Cronbach's Alpha. The results of content validity, construct validity, and quality of test items indicate that the chemical literacy assessment on chemical equilibrium material on environmental, health, and industrial topics has relatively high results. This assessment can be used to measure the chemical literacy abilities of high school students after studying chemical equilibrium.
Enhancing students’ scientific attitudes with a problem-based learning model integrated green chemistry Putri, Sarmila Eka; Aznam, Nurfina
Jurnal Pendidikan Kimia Vol. 16 No. 3 (2024): J. Pendidik. Kim : December 2024
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i3.65173

Abstract

Enhancing scientific attitudes through education by incorporating green chemistry principles is essential, so that students can explore new ideas and information about chemistry concepts while considering environmental sustainability. This has the potential to change chemistry learning to be more meaningful. This study aims to determine the influence of the problem-based learning (PBL) model integrated with green chemistry on students' scientific attitudes. This research is a quasi experiment research with pretest-posttest control group design. The participants were XI MIPA class students who were randomly selected. The data collection method used scientific attitude questionnaire as an instrument. Data analysis includes n-gain test and hypothesis testing using t test. The results showed a sig value of 0.000 (0.000 < 0.05) and tcount of 5.136 (tcount > ttable). This indicates that there is a significant difference in scientific attitudes between students who follow the PBL-green chemistry learning model and students who follow learning with a scientific approach. The existence of this difference indicates that the PBL-green chemistry model has a positive influence in improving students' scientific attitudes.
AI-based assessment: Aiken index analysis of content validity in scientific literacy instruments on the basic laws of chemistry with ethnochemistry Zai, Fila Delfia; Yamtinah, Sri; Shidiq, Ari Syahidul; Widarti, Hayuni Retno; Wiyarsi, Antuni
Jurnal Pendidikan Kimia Vol. 16 No. 3 (2024): J. Pendidik. Kim : December 2024
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i3.65174

Abstract

Scientific Literacy Assessment (SLA) is used to measure science literacy on basic chemical law material that has been qualified and tested. This study aims to prove the content validity of ethnochemistry SLA instruments integrated with artificial intelligence (AI) systems using Aiken's validity index so that they can measure students' scientific literacy in basic chemical law material. The research design uses the ADDIE development model (Analysis, design, development, implementation and evaluation which is simplified into analysis, design, and development. Content validity data was obtained from 10 experts, namely 7 chemistry education lecturers from UNS, UNY, and UM and 3 chemistry teachers in Surakarta through focus group discussions (FGD). The content validation test is based on aspects of context, language, and construct. A valid instrument is indicated by an Aiken index value of more than or equal to 0.73. The AI-integrated ethnochemistry SLA instrument on basic laws of chemistry material produced 15 valid items with an Aiken index greater than 0.73.
The differentiated STEM approach in problem-based learning: Can it enhance students’ critical thinking skills in basic chemistry laws Majid, Karima; Mulyani, Sri; Ulfa, Maria; Shidiq, Ari Syahidul
Jurnal Pendidikan Kimia Vol. 16 No. 3 (2024): J. Pendidik. Kim : December 2024
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i3.65175

Abstract

The 21st century highlights the critical role of education in developing life skills, including critical thinking, to address rapid global changes. The learning process in schools becomes a critical factor in strengthening these skills. Therefore, this study aims to determine the effect of the Differentiated Problem-Based Learning (PBL) model with the STEM approach on students' critical thinking skills on basic chemical laws in class X of a Senior High School in Surakarta. Samples were selected using cluster random sampling to choose two classes as samples, namely, the experimental and control classes. Research data was collected through a post-test using an essay measuring students' critical thinking skills. The results were analyzed using the Kruskal-Wallis’s test based on the mean post-test scores of the experimental class (73.00) and the control class (64.4), yielding a significance value of 0.004 (< 0.05). These results indicate a positive effect of Differentiated PBL-STEM on students' critical thinking skills. Skilled group students consistently demonstrated critical thinking skills, while students in the intervention and intermediate groups showed improvements from the initial diagnostic results of the learning process.
Implementation of green chemistry approaches in chemistry labs instruction: A systematic literature review Lestari, Nanda Ayu; Sulistyowati, Dewi; Dellatiani, Yohana; Irawan, Nisrina Zahira Putri; Fadhilah, Anita; Muyassaroh, Anis
Jurnal Pendidikan Kimia Vol. 16 No. 3 (2024): J. Pendidik. Kim : December 2024
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i3.65184

Abstract

In recent years, the urgent need to address environmental problems has driven green chemistry in various disciplines, focusing on designing chemical products and processes that minimize hazardous materials. This research conducted a systematic literature review (SLR) to evaluate the application of green chemistry in higher education chemistry lab practices and its impact on students' conceptual understanding, practical skills, and environmental awareness. Using the PRISMA method, 46 articles were analyzed from the Scopus and ScienceDirect databases extracted from a total of 537 published between 2015 and 2024. The findings show that applying green chemistry in chemistry laboratory learning can improve students' conceptual understanding, practical skills, and environmental awareness while encouraging environmentally friendly synthesis methods. However, challenges such as limited resources and the need for additional training for lecturers still exist. Institutional support and professional development are needed to maximize implementation. In conclusion, green chemistry has great potential to create a more environmentally responsible generation of chemists, with recommendations for comprehensive integration into chemistry curricula and increased support for educators to address implementation challenges. This study provides a basis for expanding the application of green chemistry in chemistry education and preparing students to face future sustainability challenges.

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