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All Journal Jurnal Pendidikan dan Pembelajaran Khatulistiwa (JPPK) Biology, Medicine, & Natural Product Chemistry Jurnal Kimia Riset Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Abdi Insani Hydrogen: Jurnal Kependidikan Kimia J-ABDIPAMAS (Jurnal Pengabdian Kepada Masyarakat) JIPI (Jurnal IPA dan Pembelajaran IPA)
Eni Mayasari
Universitas Tanjungpura
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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The Effectiveness of a Local Wisdom-Based Science E-Module on Students’ Learning Outcomes in Additive Substances Hilwannisa, Hilmi Ufairah; Enawaty, Eny; Mayasari, Eni
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 2 (2025): April 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i2.15411

Abstract

This study aims to examine the differences in students' learning outcomes before and after the implementation of a local wisdom-based science e-module in junior high school, as well as to evaluate the effectiveness of the e-module on learning outcomes. The study employed an experimental method with a one-group pretest-posttest design. The sample consisted of 15 eighth-grade students from SMP Karunia Selakau, selected through total sampling. Data were collected using pretests and posttests to measure improvements in learning outcomes. The data were analyzed using the Shapiro-Wilk normality test and the Wilcoxon Signed-Rank test due to non-normal distribution. The results revealed a significant difference in learning outcomes following the use of the local wisdom-based e-module, with an Asymp. Sig value of <0.001. The average pretest score of 45.33 increased to 89.33 in the posttest. The N-Gain analysis showed a score of 0.78, categorized as high, while the effect size of 0.89 indicated a strong level of effectiveness. These findings suggest that the use of a local wisdom-based e-module successfully enhances students' learning outcomes in the topic of food additives and can serve as an innovative alternative teaching material in science education.
Phytochemical Screening and Antioxidant Activity of Dyera polyphylla (Miq) Steenis Extract Using the DPPH Method Monika, Putri Dharma; Muharini, Rini; Mayasari, Eni
Biology, Medicine, & Natural Product Chemistry Vol 14, No 2 (2025)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2025.142.1069-1076

Abstract

This research aimed to determine the chemical profile and antioxidant activity of the jelutung rawa plant (Dyera polyphylla). Phytochemical screening tests were conducted using specific reagents, thin-layer chromatography (TLC), and high-performance liquid chromatography (HPLC). Determination of antioxidant activity was performed the DPPH method. The research results showed the presence of secondary metabolite compounds, namely alkaloids, flavonoids, phenolics, tannins, and terpenoids in the leaves, while the contain alkaloids, phenolics, tannins, and terpenoids. The antioxidant activity in this plant has been identified as a strong natural antioxidant.
Phenolic Screening and Total Phenolic Content of Jelutung Rawa (Dyera polyphylla (Miq.) Steenis) Plant Extracts Febriani, Melda; Muharini, Rini; Mayasari, Eni; Ola, Antonius
Jurnal Kimia Riset Vol. 10 No. 2 (2025): December
Publisher : Universitas Airlangga, Campus C Mulyorejo, Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkimris.v10i2.71004

Abstract

Dyera polyphylla (Miq.) Steenis, or jelutung rawa, is an endemic tree species native to Indonesia’s tropical peat swamp forests. While related species such as Dyera costulata have been reported to contain various bioactive compounds particularly phenolics with antioxidant, anti-inflammatory, and antimicrobial properties, there has not been phytochemical studies on D. polyphylla. This study aimed to investigate the phenolic compound profile and total phenolic content in the stem wood, stem bark, and leaves of D. polyphylla. Extraction was carried out using total and stratified maceration methods with n-hexane, ethyl acetate, and methanol as solvents. Qualitative analysis involved phytochemical screening by using phenolic specific reagents, thin-layer chromatography (TLC) with FeCl₃ reagents, and high-performance liquid chromatography (HPLC). Total phenolic content was quantified using the Folin–Ciocalteu spectrophotometric method. Phenolic compounds were detected in all plant parts, particularly in the ethyl acetate and methanol extracts. HPLC analysis showed that the chromatographic profile of the methanol extract from stem wood closely resembled that of the leaves. The highest phenolic content was observed in the methanol extract of the leaves (29.02 mg GAE/g). These results suggested that D. polyphylla, particularly its leaves, is a promising natural source of phenolic compounds with potential antioxidant and therapeutic value.
Co-Authors Agusta, Muhammad Farras Leonasa Andi Ifriany Antonius Ola Bilqis, Adilla Dalilah Dalilah Eny Enawaty Erlina ERLINA Erlina Erlina Erlina*, Erlina Febriani, Melda Febriyani, Roseana Fitri, Rosiana Hafiz, Muhammad Iqbal Abdul Hilwannisa, Hilmi Ufairah Ifriany, A. Ifriany, Andi Ira Lestari Mardasela, Tery Maria Ulfah Maria Ulfah Marisa Masriani . Monika, Putri Dharma Muhammad Arifin Muhammad Farras Leonasa Agusta Noprianti, Dini Rachmat Sahputra Rachmat Sahputra Rini Muharini Risya Sasri Safitri, Dian Eka Sahputra, Rahmat Salam, Supriatno Sasri, Risya Siahaan, Gorga Josua Chrisvandoli