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All Journal Jurnal Pendidikan dan Pembelajaran Khatulistiwa (JPPK) Biology, Medicine, & Natural Product Chemistry QUANTUM: Jurnal Inovasi Pendidikan Sains 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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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.
Pembelajaran Bermakna dalam Praktikum Kimia: Metode Campuran (Mixed Method) Menggunakan MLLIv2 Erlina; Maria Ulfah; Eni Mayasari; Marisa
Jurnal Penelitian Pendidikan IPA Vol 11 No 9 (2025): September
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i9.12393

Abstract

This study aimed to measure the extent of meaningful learning achieved by students during general chemistry laboratory activities. A descriptive quantitative design was employed with 126 participants, consisting of 51 Chemistry Education and 75 Biology Education students. Data were collected using the Meaningful Learning in the Laboratory Inventory (MLLIv2), which evaluates affective, cognitive, and affective–cognitive aspects. The data were analyzed and categorized into five levels from “very poor” to “very good.” The results showed that most students were in the “very good” category (81–100%) across all aspects, with smaller proportions in the “good” category (61–80%). No students were classified as “fair,” “poor,” or “very poor.” Chemistry Education students achieved slightly higher averages (affective = 91%, cognitive = 93%, affective–cognitive = 91%, overall = 92%) compared to Biology Education students (affective = 85%, cognitive = 89%, affective–cognitive = 89%, overall = 88%). These findings indicate that the laboratory effectively fostered meaningful learning by integrating cognitive understanding with affective engagement. The results also emphasize that meaningful learning is shaped not only by conceptual mastery but also by students’ emotional responses and their ability to connect laboratory experiences with academic and professional goals.
Development of Learning Videos Assisted by Instagram Media on the Reaction Rate Content Adriana, Tri Patmawati; Enawati, Eny; Mayasari, Eni
QUANTUM: Jurnal Inovasi Pendidikan Sains Vol 16, No 1 (2025): April 2025
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/quantum.v16i1.21552

Abstract

Chemistry is the study of matter and the changes that accompany it. Chemical matter is defined as everything that has mass and occupies space. Chemical materials can be single substances (elements) or mixed substances (compounds). Based on the results of an interview with a teacher at SMAN 7, Pontianak revealed that students have difficulty in learning the reaction rate especially in understanding the reaction rate concept, where students can only repeat the definition of the reaction rate without understanding the real meaning so that they tend to rely on memorization alone. The abstract nature of reaction rate content is also one of the reasons why students have difficulty in learning reaction rate content.  The purpose of this study was to develop Instagram media-based learning videos on reaction rate content and to determine the level of validity and students' responses to these learning videos to increase efficient and effective knowledge. This research uses the Research and Development (R&D) approach of the ADDIE model (Analyze, Design, Develop, Implement, Evaluate), with only the Analyze, Design, and Develop stages applied. Data collection techniques used, namely direct communication techniques interviews and indirect communication in the form of validity test questionnaire sheets and wide stundent response test questionnaires, with research instruments in the form of feasibility assessment sheets and student response questionnaires. The results proved that the average percentage of content validity was 95.9%, and media validity was 98%, both with very valid criteria. The average percentage of student responses in the small group test reached 83.3% with very good criteria, while in the large group test it was 91.25%. In addition, the average percentage of teacher responses reached 88%, with very good criteria, thus it can be concluded that the learning video assisted by Instagram media on reaction rate material is declared very feasible to use.
Co-Authors Adriana, Tri Patmawati Agusta, Muhammad Farras Leonasa Andi Ifriany Antonius Ola Bilqis, Adilla Dalilah Dalilah Eny Enawati 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