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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) JURNAL PENDIDIKAN, SAINS DAN TEKNOLOGI
Ilidio Ximenes Moreira, Ilidio Ximenes
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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ANALISIS KANDUNGAN KIMIA EKSTRAK BIJI MAHONI DENGAN PELARUT KLOROFORM DAN METANOL Moreira, Ilídio Ximenes; M. Kopong, Aloysius; H. B. Hayon, Vinsensia
PENDIDIKAN SAINS DAN TEKNOLOGI Vol 11 No 3 (2024)
Publisher : STKIP PGRI Situbondo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47668/edusaintek.v11i3.1254

Abstract

Mahogany is a plant that grows freely in forests, gardens, and various areas and as a plant that has the benefits and economic value. However, now mahogany has been cultivated and is known as a traditional medicinal plant for humans and animals. The objective of this research is to identify the chemical compounds contained in the mahogany seed extract with methanol and chloroform solvents. The research used mahogany seeds with methanol and chloroform solvent. After that, was analyzed by Thin Layer Chromatography (TLC) and GC-MS instrument. The results of the TLC test when used the methanol solvent with eluent chloroform: ethyl acetate: n-hexane as 4 points, an Rf value are 0.2237; 0.3818; 0.4727; and 0.6363. The eluent of chloroform solvent is n-Hexane: ethyl acetate as 5 points, Rf value are 0.1145; 0.2581; 0.3709; 0.5855; and 0.6709. Then, it was analyzed with the GC-MS instrument, revealing that the mahogany seed extract from each solvent contained 26 peaks for the methanol solvent and 16 peaks for the chloroform solvent. Therefore, it was analyzed with the GC-MS instrument, revealing that the mahogany seeds extract as 26 peaks for the methanol solvent and 16 peaks for the chloroform solvent. Thus, can be concluded that the mahogany seeds extracts with methanol and chloroform solvents have the same and also different contents and compound groups, depending on the polarity of the groups and/or compounds contained in mahogany seeds towards methanol and chloroform solvents. Therefore, concluding that the seeds extract with methanol and chloroform solvents contain the same compounds and different compounds depends on the polarity of the groups/or substance in the mahogany seeds with methanol and chloroform solvent. That’s way, we would like suggest to the future researchers be able to isolate the chemical content of the mahogany seeds and test their toxicity.
Outcome Analysis of Project-Based Training on Book Chapter Writing for Elementary School Teachers Wariani, Theresia; Naen, Alfons Bunga; Hayon, Vinsensia H. B.; Tangi, Hironimus; Tinenti, Yanti Rosinda; Moreira, Ilidio Ximenes
Jurnal Penelitian Pendidikan IPA Vol 12 No 3 (2026): In Progress
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i3.14373

Abstract

This study aims to evaluate the effectiveness of a training project using the Project-Based Learning (PPjBL) model in enhancing elementary school teachers’ competencies in writing and documenting best practices into book chapters. This study employs a mixed-methods approach with a pre-experimental design (one-group pretest–posttest design). The study participants consisted of 9 elementary school teachers selected using saturation sampling. Quantitative data were obtained through pretest and posttest assessments of writing skills, while qualitative data were collected through observations of the implementation of the PPjBL model and perception questionnaires. The results showed a significant improvement in teachers’ writing skills after the training (p < 0.01), particularly in the aspects of content, structure, and academic language. The implementation of the PPjBL model fell into the “mostly implemented” category with an average score of 3.25, indicating that the model’s stages were carried out fairly optimally. In addition, teachers’ perceptions of the PPjBL model fell into the “very positive” category, with an average score of 3.54, particularly regarding the aspects of relevance and the ability to produce tangible outputs in the form of books. These findings indicate that PPjBL is effective and relevant as a project-based training model focused on publication-oriented outputs. This study contributes to the development of a professional teacher training model that not only enhances competencies but also produces tangible outcomes that can be utilized within the educational community.
Co-Authors Alfons Bunga Naen H. B. Hayon, Vinsensia Hayon, Vinsensia H.B. M. Kopong, Aloysius Tangi, Hironimus Theresia Wariani Tinenti, Yanti Rosinda