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All Journal Edu-Sains: Jurnal Pendidikan Matematika dan Ilmu Pengetahuan Alam Jurnal Inovasi Pendidikan Kimia Edu Sains: Jurnal Pendidikan Sains dan Matematika JPG (Jurnal Pendidikan Geografi) Jurnal Penelitian Pendidikan IPA (JPPIPA) Journal of Natural Science and Integration IJCER (International Journal of Chemistry Education Research) Jurnal Pendidikan Lingkungan dan Pembangunan Berkelanjutan Indonesian Journal of Halal Research Journal of Educational Chemistry (JEC) Journal of Tropical Chemistry Research and Education Jurnal Ilmiah Bakti Farmasi Science Education and Development Journal Archives
Zamhari, Muhammad
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Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Neuroscience Physics Other

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The Effect of PjBL-Based QODE Model on Critical Thinking and Learning Achievement of Buffer Solution Topic Wulayalin, Khafifah Aulia; Zamhari, Muhammad; Ramadanti, Wicahni; Nurjanah, Stevani
IJCER (International Journal of Chemistry Education Research) VOLUME 9, ISSUE 2, OCTOBER 2025
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcer.vol9.iss2.art9

Abstract

Chemical misconceptions often occur when students need to understand the initial concept. This misconception has an impact on students' ability to understand the material and results in a decrease in students' learning achievement. Students' concept understanding can significantly improve by applying practical learning approaches, models, and strategies. This study aims to determine how applying the QODE learning model based on PjBL improves grade XI students' learning achievement and critical thinking skills on Buffer Solution topic. This type of research is a quasi-experiment with a nonequivalent control group pretest–posttest design. This study's subjects were control class for cooperative learning group investigation learning model and experimental class for PjBL-based QODE learning model at SMA Negeri 1 Sleman. Two intact classes (n = 36 per group) completed a two-tier multiple-choice critical-thinking test and an achievement test before and after a 3-session intervention. The research data were analyzed using the Wilcoxon and the N-gain tests. The Wilcoxon test result shows that both learning models used in experimental and control groups influence student learning achievement and critical thinking with the value of Sig. <0.05. N-Gain test shows that the experimental group experienced an increase of 0.74 for critical thinking skills and 0.78 for student learning achievement which in high category, while the control group experienced an increase of 0.38 for critical thinking skills and 0.73 for student learning achievement which in low and high category. These findings indicate that the QODE learning model based on PjBL contributes to improving students' critical thinking.
Comparing STEM and contextual approaches' impact on students' motivation and learning in acid-base materials Aji, Latief Susila; Zamhari, Muhammad; Saputra, Febri Ilham; Masrukhah, Dewi
Edu Sains: Jurnal Pendidikan Sains & Matematika Vol 12 No 2 (2024): VOLUME 12 NOMOR 2 DESEMBER 2024
Publisher : IAIN Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23971/eds.v12i2.8040

Abstract

This study aimed to compare the impact of science, technology, engineering, and mathematics (STEM) and contextual approaches on students' motivations for learning and achievements in chemistry lessons focused on acid-base materials. A quasiexperimental design with a non-equivalent control group was used, and the participants were 66 students of class XI Science students from State Senior High School 1 (SMA N 1) Kalibawang. Data collection instruments included pre and post-questionnaires and test questions. The findings revealed significant differences in students' learning motivations and achievements between the STEM and contextual approaches to acid-base materials. Both approaches improved students' learning motivations, with the STEM approach yielding higher gains.
A Powtoon Animation Video Development Utilizing a Scientific Approach for Teaching Electrolyte and Non-electrolyte Solutions Eljinsa, Sehati Mutiara; Zamhari, Muhammad
Jurnal Penelitian Pendidikan IPA Vol 10 No 11 (2024): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i11.9545

Abstract

Students often experience difficulty learning chemistry because the concepts are abstract and complex and require deep understanding. Therefore, innovation in learning is needed. Educational media is crucial for fostering this innovation. This research aims to develop educational materials on Powtoon animation that utilize a scientific approach to instruct on electrolyte and non-electrolyte solutions and evaluate their efficacy. The method applied was ADDIE model covering five steps, i.e. Analysis, Design, Development, Implementation, and Evaluation. The study involved three peer reviewers, experts in media and materials, five high school chemistry teachers, and thirteen students. Data were collected through questionnaires that were analyzed qualitatively and quantitatively with validated instruments. The result is an interactive learning video in HD mp4 format covering electrolyte and non-electrolyte solutions. The product obtained a score of 82.5% and 95% by material and media experts, respectively, and was categorized as valid. Assessments by teachers and students show scores of 82,5% and 94.4% in a very good category. This Powtoon animation video serves as an alternative and potential medium for teaching chemistry on this topic in the classroom.
The Effect of Extraction Method on the Extract Yield in the Carotenoid Pigment Encapsulation for Halal Natural Pigment Fajriati, Imelda; Ikhsani, Atika Yahdiyani; Monitasari, Annisa; Zamhari, Muhammad; Kartika, Betania; Subba, Jas Raj
Indonesian Journal of Halal Research Vol. 4 No. 2 (2022): August
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ijhar.v4i2.17188

Abstract

The Soxhlet and maceration methods were used to determine the extract yield in the carotenoid pigment encapsulation for halal natural pigment production. This study aims to obtain halal natural pigment by determining the highest extract yield from the encapsulation of β-carotene in carrots. The carrot was extracted using Soxhlet and maceration method and then continued by oven drying. The n-hexane was selected because of its better volatility than ethanol and provided less solvent residue after extraction. UV-Vis spectroscopy and Thin Layer Chromatography (TLC) were used to characterize the n-hexane yield extract. Encapsulation of the pigment was investigated by adding five grams of maltodextrin to extract n-hexane weights of 0.05, 0.50, 0.75, and 1.0 grams. The maceration method yielded a much higher yield than the Soxhlet extraction method, with 2.24% (w/w) and 0.88% (w/w), respectively. The n-hexane extract absorbed a maximum wavelength of 450 nm with a retention factor (Rf) of 0.62. These values are confirmed by comparing the band's Rf values and absorption spectra with the standard's. Light absorption spectra at wavelengths 350-500 nm confirmed an intense color expression for encapsulation containing the highest pigment concentration.
Co-Authors Aji, Latief Susila Arief, Syaeful Atika Yahdiyani Ikhsani Dani, Ahmat Eljinsa, Sehati Mutiara Imelda Fajriati Javid, Elan Mustafa Kangkamano, Tawatchai Kartika, Betania Marifah, Iis Elia Masrukhah, Dewi Monitasari, Annisa Muhibullah, Muhammad Mukoningah, Fuadatul Nurjanah, Stevani Nurleni, Novi Pratiwi, Nani Arum Pusfitasari, Dewi Vitama Rahmawati, Rahmawati Ramadanti, Wicahni Ridzaniyanto, Pandu Saputra, Febri Ilham Setiawati, Estriana Murni Subba, Jas Raj Subekti, Zainal Arif Ulfa Masamah, Ulfa Ummah, Iswatul Wirabhuana, Arya Wulayalin, Khafifah Aulia Zulfania, Annisa