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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 352 Documents
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Self-efficacy assessment in chemistry learning: Development and validation using confirmatory factor analysis Jajang Muhariyansah; Hari Sutrisno; Fajar Naqsyahbandi
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 3 (2023): December
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i3.48748

Abstract

Learner self-efficacy is the confidence of a learner to determine how he feels, thinks, motivates and behaves. The purpose of this study was to analyze the instrument of self-efficacy assessment of students in the Aliyah madrasah in Musi Rawas Prov. South Sumatra. The total of respondents to testing this instrument was 234 students. This study uses Second Order Confirmatory Factor Analysis (CFA) to determine the validity and reliability of Likert scale instruments regarding students' self-efficacy in chemistry learning. The sampling technique used is proportionate Stratified Random Sampling. The research results show that the instrument developed has good construct validity as seen from the loading factor value > 0.50. The construct reliability test using CR and AVE values also showed acceptable results so it was declared suitable for use in data collection to measure self-efficacy in learning chemistry. It is hoped that teachers can measure student self-efficacy using this instrument. It is expected that teachers can measure students' self-efficacy using this instrument.Keywords: Assesment; Confirmatory factor analysis; Development; Self-efficacy
The antimicrobial study of white turmeric (Curcuma zedoaria) extracted using deep euthectic solvent (DES) and ultrasonication Timotius Agung Soripada; Erny Tandanu; Refi Ikhtiari
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 3 (2023): December
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i3.49349

Abstract

This research is prompted by the emergence of various cases of infectious diseases and antibiotic resistance that often occur and the development of the latest research methods in the field of medicinal plants. One of the medicinal plants that is often used is Curcuma zedoaria which is generally extracted using conventional solvents. This research aims to find new innovations in the extraction process of medicinal plants. This research is a laboratory experiment carried out in vitro. This research uses the latest solvent, called DES (Deep Eutectic Solvent) with the help of ultrasonication to extract active compounds from C. zedoaria as a natural anti-bacterial. DES is known as an environmentally friendly solvent, cheap, easy to make, and is still relatively new in Indonesia. The C. zedoaria extraction process uses two types of DES solvent composition assisted by a ultrasonicator. The research results show that: White turmeric extract (C. zedoaria) obtained by extraction using DES solvent and ultrasonication.  Ultrasonication results using 30%, 70% and 100% DES solvent showed antimicrobial properties against Escherichia coli with a lower zone of inhibition compared to the antibiotic ciprofloxacin. Ultrasonication results using 30%, 70% and 100% DES solvent showed antimicrobial properties against Staphylococcus aureus with a lower zone of inhibition compared to ciprofloxacin. TLC data shows that the white turmeric extract obtanined contains various antimicrobial substances which allows to inhibit each other to such an extent that their activity is lower than ciprofloxacin.Keywords: C. zedoaria; Deep eutectic solvent; Escherichia coli; Staphylococcus aureus; Ultrasonication
Formulation and antibacterial activity of frankincense sap extract deodorant spray (Styrax benzoin) Nora Susanti; Jamalum Purba; M Nizam; Cindy Agnesia; Astri Devi Br Pakpahan
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 3 (2023): December
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i3.49009

Abstract

Deodorant is a cosmetic preparation used by the wider community to control and reduce body odor. Deodorant act as antibacterial and are able to reduce the excretion of sweat in the armpits. Frankincense is a plant that contains flavonoids and tannins can act as antibacterial. This aim of this study was to determine the effectiveness of frankincense sap extract as an antibacterial in deodorant spray preparation. Frankincense sap powder is macerated with ethanol to obtain frankincense sap extract. Deodorant formulations are prepared from frankincense sap extract in various concentrations (5%, 10%, 15%, 20%, 25%) and combined with cosolvent, emollient, and solvent. Tests carried out include antibacterial testing against Pseuodomonas aureugenisa and Staphylococcus epidermidis bacteria, organoleptic test, pH test, viscosity test, and irritation test. The test results showed that antibacterial testing gave the highest inhibitory diameter of 2.63 mm and 5.35 mm which was exhibited by formulation 5.Keywords: Bacteria; Body odor; Deodorant spray; Styrax benzoin
Practicum design for making bioplastics from uli banana peel (Musa paradisiaca S.) to grow the character of the pancasila student profile in polymer chapter Alfandi Ahmad; Retno Aliyatul Fikroh
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 3 (2023): December
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i3.48864

Abstract

The change from the 2013 curriculum to the Merdeka curriculum emphasizes the importance of experiential learning and the Pancasila student profile. However, polymers, a crucial macromolecular sub-material, often lack experimental support in education. This study focuses on selecting polymer materials through practical activities, specifically the creation of bioplastics from uli banana peels (Musa paradisiaca S), to foster the development of Pancasila Student Profile characteristics: collaborative teamwork, critical thinking, and innovation. Using a qualitative descriptive method, the study involves curriculum analysis, practical design, and feasibility assessment. The research revealed that the practical design aligns with the characteristics of high school experiments and produces high-quality bioplastics in terms of absorbency, tensile strength, elongation percentage, and biodegradability. Teacher and student interviews further confirmed the alignment with the Pancasila phase F student profile (class XII), emphasizing cooperation, objective-oriented learning, critical thinking, and innovation. This study establishes a strong connection between curriculum, learning outcomes, and experimental design in uli banana peel starch bioplastics production. Not only does it promote the development of Pancasila student profiles, but it also yields high-quality bioplastics.Keywords: Bioplastic; Merdeka curriculum; Pancasila; Polymer; Uli banana 
Development of a reaction rate of chemistry module through a scientific approach to science Tiurlina Siregar
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 3 (2023): December
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i3.49819

Abstract

Module development is very important in chemistry learning. The lack of modules as teaching materials is an obstacle in learning chemistry, especially the reaction rate material. Therefore this study aims to develop and validate the feasibility of the chemistry module on the reaction rate material through a scientific approach, as well as to assess how students and teachers respond to the product being developed. The research and development (R&D) method is the method used and ADDIE is the development model applied as the methodology. The sample in this study was 15 students. The sampling technique is saturated samples. Modules are validated by material and media validators and then validated by teachers and asked for responses from students. Data is processed using SPPS Reaction rate as the subject of this research. The developed module is very feasible to be applied in chemistry learning on reaction rate material, according to the results of the data analyzed. The material validator gave an average score of 91.77% (very feasible), the media validator 90.48% (very feasible) and the teacher's response was 99.07% (very good) and the students' response to the developed module was 97.50% (Very good).Keywords: Chemistry; Module; Reaction rate; Scientific approach
Preparing of chemical bonding learning media based android using smart apps creator program Ramlan Silaban; Osi Annauli Br Girsang; Roselva Theresia Manalu; Marham Sitorus; Simson Tarigan; Irving Josafat Alexander
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 3 (2023): December
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i3.51492

Abstract

The aim of this research is to obtain Android-based chemical bond learning media using the smart apps creator program that is feasible and eligible to use. To achieve the goal, development research has been carried out which refers to the 4 D model with the stages define, design, develop and disseminate. The research was conducted at SMA Negeri 5 Medan involving teachers and students of class X MIA. The research instruments used are non-test instruments including needs analysis instruments, feasibility test instruments and student response instruments. The research results are: (1). An Android-based chemical bond learning media has been obtained using a smart apps creator program with features main view, main menu, learning material, evaluation, summary and references. (2). The Android-based chemical bond learning media obtained was deemed suitable for use in learning with a feasibility level of 85.0% with very worthy category. (3). The students give good eligibility responded (82.6%) for the Android-based chemical bond learning media obtained with meets the requirements for use as learning media.Keywords: Android based; Chemical bonding; Learning media; Smart apps creator program
Mental model of the influence of reactant properties on reaction rate Iqlima Rahayu; Wiji Wiji; Galuh Yuliani; Tuszie Widhiyanti; Sri Mulyani
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 3 (2023): December
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i3.50411

Abstract

Reaction rate is still considered difficult by students because it contains abstract concepts and mathematical equations, so students' mental models are not complete. To connect the three levels of representation in the process of addressing chemical problems, learning has to employ mental models as a whole. Therefore, this study aims to obtain students' mental models regarding the influence of reactants properties on reaction rates. This research uses a qualitative descriptive method with the Mental Model Diagnostic Test-Interview About Event (MMDT-IAE) instrument. Based on the research results, there are two types of mental models, namely Partial Understanding (PU) and Partial Understanding with Certain Misconceptions (PU/SM). The effect of surface area on reaction rate, students 1, 2, 3, 4, 6, and 7 answered correctly but could not connect the three levels of representation, while student 5 could not explain the relationship between effective collisions and reaction rate. The influence of structure on reaction rates, students 1, 2, 3, 4, and 7 can answer structure, reactivity and collision theory, while student 5 cannot explain collision theory. Students 1, 4, and 7 can answer all the probing questions but cannot connect the three levels to the influence of ionization energy on the reaction rate. The conclusion of this research is that students' mental models regarding the influence of reactant properties are not complete and there are students who experience misconceptions. The implications of this research are as a basis for teachers to design appropriate learning strategies.Keywords: Mental model; MMDT-IAE; Reaction rate; Three level of representation
Development of interactive teaching materials based on inquiry based learning models based on the outcome-based education curriculum in analytical chemistry learning Anna Juniar; Siti Rahmah; Tua Paimaon Tambunan; Pravil M Tambunan
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 3 (2023): December
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i3.50780

Abstract

This research to develop an IBL-based electronic e-module integrated with the OBE curriculum in analytical chemistry learning. This research is a development research using the ADDIE model which consists of 5 stages: Analysis. Design, Development, Implementation and Evaluation. The sampling technique uses purposive sampling as many as 28 preservice chemistry teachers. Research data were obtained from a validation questionnaire for media experts, material experts, linguists and student responses to the developed e-module with BSNP criteria. Material expert validation obtained an average content feasibility of 3.22, language eligibility 3.52 and presentation feasibility 3.73 IT expert validation obtained an average for design indicators 3.75, display 3.75 and visual 3.3 and usage 3.75. Student response to learning using an electronic IBL-based e-module integrated with the OBE curriculum for display is 89.99%, content quality is 92.85%, usage is 93.3% and usefulness is 93.15%. Implementation of interactive e-module products based on inquiry based learning in learning that can improve student chemistry learning outcomes in the Analytical Chemistry course with Gain 81.20.Keywords: Analytical chemistry; e-modules; Gravimetri; Inquiry based learning; Volumetry
Comparative assessment of human salivary α-amylase inhibitor from Indonesian herbs Khomaini Hasan; Angga Himas Setyawan; Muhamad Abidin; Nurul Aida Fathya; Dewi Ratih Handayani; Desy Linasari; Saronom Silaban; Toto Subroto; Muhammad Yusuf
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 3 (2023): December
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i3.51153

Abstract

Diabetes mellitus (DM) is a multifactorial disease defined by persistent hyperglycemia and impaired carbohydrate, lipid, and protein metabolism due to a lack of insulin secretion. The objective of this study was to assess the Indonesian herbs which have the ability to act as human salivary α-amylase inhibitors, thus, that they can be implemented for medical purposes. In this study, fifteen Indonesian herbs were assessed for their capability as α-amylase inhibitor. The water-reflux method was used to extract all potential water-soluble active components. The Fuwa technique was used to test α-amylase activity. There were significant variations in the effects of herbs on salivary α-amylase activity, according to the statistical using one-way ANOVA and Post Hoc Tukey between the with and without inhibitors. According to the findings, Turmeric (Curcuma longa L.) and pandan leaf (Pandanus amaryllifolius Roxb) had the highest inhibitory power (80%).Keywords: Diabetes mellitus; Flavonoids; Herbs; α-amylase inhibitors
Development of project-based interactive e-modules in accordance with the IQF integrated curriculum concept in learning organic chemical reactions to improve student chemistry learning outcomes Bajoka Nainggolan; Anna Juniar; Ramlan Silaban
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 3 (2023): December
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i3.47366

Abstract

Project-based interactive learning is the right choice to encourage students to learn actively and effectively to improve their learning outcomes. The aim of the research is to find project-based interactive e-Module teaching materials that are valid, effective, standard, suitable for use. Research stages: Needs analysis; e-Module development; standardization validation; individual, small and large group trials; effectiveness test, and test students' perception of satisfaction. The research uses the ADDIE method. Sample: Curriculum, teaching materials from publishers A and B, expert validators and 45 students. Test the feasibility and effectiveness of the e-Module, measuring the increase in learning outcomes and student satisfaction using test instruments. Data were processed and analyzed descriptively using SPSS. Research findings: the interactive e-Module teaching materials developed are valid, effective and standard, suitable for use. The product was effective in small group trials with student learning outcomes of (M 79.35%), large group (M= 79.85%), high and effective category. Respondents' assessment of the product was very valid, suitable for use (M = 3.81). The student satisfaction index is very satisfied (M = 88.80%). Hypothesis testing with paired ttest obtained sig. 0.011. Because sig < α (0.011 < 0.05), there are differences in post-test and pre-test learning outcomes. In conclusion, the project-based interactive e-Module teaching materials developed are valid, effective, standard, and suitable for use to improve student chemistry learning outcomes.Keywords: Development of interactive; IQF-based curriculum; Project-based; Valid and effective e-modules

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