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All Journal Hydrogen: Jurnal Kependidikan Kimia Jurnal Pendidikan Dasar dan Menengah: Edumedia
Wila
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Chemistry Education Languange, Linguistic, Communication & Media Mathematics Other

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Upaya Meningkatkan Hasil Belajar IPA Menggunakan Model Pembelajaran Project-Based Learning pada Siswa Kelas V Di SDN-11 Palangka Wila; Rumiati; Tribuani
Jurnal Pendidikan Dasar dan Menengah Vol 2 No 1 (2024): Jurnal Pendidikan Dasar & Menengah | EduMedia
Publisher : Pusat Kajian Bahasa Daerah & Budaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69743/edumedia.v2i1.24

Abstract

This study used the Classroom Action Research method which was carried out in two cycles with the aim of determining the effectiveness of using a project-based learning model in improving the learning outcomes of science subject in the fifth-grade students of SDN-11 Palangka, Kota Palangka Raya. This study was based on observation and interview with a classroom teacher at the school where researchers found problem in student learning outcomes. One of problems is that there were still many students who have not mastered the learning material of the science subject because the average score achieved was 70.4 where this score is still below the Minimum Completeness Criteria (KKM) standardized by the school, which is 75. To solve the problem, researchers tried to use the project-based learning model as a solution. The results showed that the teacher's activity score increased from cycle I to cycle II with the achievement criteria from the category of "good" to "very good". In addition, student activities from cycle I to cycle II also increased with the achievement criteria from the category of "fairly good" to "very good". Regarding the completeness of student learning outcomes in the first cycle, it showed 65% of students reached the KKM and it increased in the second cycle to 92%. Based on the data, it can be concluded that the use of project-based learning model can improve the learning outcomes of students in the science subject of the fifth graders.
Article Review: Potential of Alkaloid Compounds from East Kalimantan Mangrove Plants as Antibacterial Agents Aini, Kharis Matul; Astuti, Indah; Syahirah, Alya; Muhfidah Lutfia Ulfa; Usman; Wila
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 1 (2026): February 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i1.18775

Abstract

Alkaloids are organic compounds characterized by a ring structure containing one or more nitrogen atoms and produced through secondary metabolism in plants and animals. Mangroves are woody plants that grow in wet, muddy, and brackish environments and are widespread in East Kalimantan. Some mangrove species found in this region include Avicennia sp., Rhizophora apiculata, Rhizophora mucronata, Sonneratia alba, Rhizophora stylosa Griff., Avicennia marina, and Bruguiera gymnorrhiza. This study uses a secondary research approach with a narrative review method to provide an overview and scientific information regarding mangrove leaf extract fractions from East Kalimantan that exhibit antibacterial activity. Data were collected from 60 scientific journals published between 2015 and 2025, sourced from electronic databases such as Google Scholar and Semantic Scholar. The review results indicate that mangroves in East Kalimantan possess high biodiversity and significant chemical potential, primarily due to their rich content of secondary metabolites, including alkaloids, flavonoids, tannins, terpenoids, and saponins, which contribute to various biological activities, including antibacterial, antioxidant, anti-inflammatory, and anticancer effects. The findings indicate that mangroves in East Kalimantan contain various secondary metabolites, particularly alkaloids, which contribute significantly to antibacterial activity. Among the species reviewed, Avicennia sp. and Avicennia marina exhibited the most consistent and potent antibacterial effects against several pathogenic bacteria. Overall, this review confirms that mangroves from East Kalimantan are a promising natural source for alkaloid-based antibacterial agents and have potential for further development in pharmaceutical applications.
Co-Authors Aini, Kharis Matul Astuti, Indah Muhfidah Lutfia Ulfa Rumiati Syahirah, Alya Tribuani Usman