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All Journal Jurnal Natur Indonesia Chemica: Jurnal Ilmiah Kimia dan Pendidikan Kimia Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Akademika Kimia Indonesian Journal of Chemistry Jurnal Gizi Kerja dan Produktivitas Mattawang: Jurnal Pengabdian Masyarakat Media Eksakta Journal of Education Research Jurnal Akademika Kimia Sovereign: International Journal of Law Aurelia: Jurnal Penelitian dan Pengabdian Masyarakat Indonesia Jurnal Banua Oge Tadulako Jurnal Akademika Kimia
Tahril
Program Studi Pendidikan Kimia, Universitas Tadulako, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Analysis of Primary Metabolites Content in Ketapang Seed Tempe (Terminalia Catappa) Siska D. Wulandari; Siti Nuryanti; Tahril Tahril; Sitti Aminah
Jurnal Akademika Kimia Vol. 15 No. 1 (2026)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2026.v15.i1.pp9-16

Abstract

Ketapang seed tempeh (Terminalia catappa) is made from ketapang seed waste through a fermentation process using Rhizopus sp., as with soybean tempeh. This study used a quantitative descriptive method to determine the content of primary metabolites, including fat, protein, and carbohydrates. Laboratory analysis was conducted at the Chemistry Education Laboratory, Tadulako University, using the Soxhlet method for fat, the Kjeldahl method for protein, and the phenol-sulfur method for carbohydrates, as well as organoleptic tests by 15 panellists. The results showed that ketapang seed tempeh had very low fat content (0.17%), low protein (0.02 g per 100 g sample), and moderate carbohydrate (10.06%). Fried ketapang tempeh was preferred by the panellists, although its acceptance level was still lower than that of soybean tempeh. The novelty of this study lies in the quantitative evaluation of primary metabolites in tempeh made entirely from ketapang seeds, which has not been previously reported. These findings indicate that ketapang seeds have the potential to serve as an alternative ingredient in the production of low-fat tempeh.
The Effect of the PBL Model on Science Process Skills and Science Learning Outcomes of Students Abdur Rahman; Tahril Tahril; Purnama Ningsih
Jurnal Akademika Kimia Vol. 13 No. 3 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i3.pp93-101

Abstract

This study aims to determine the effect of the project-based learning model application on science process skills and students' science learning outcomes. This type of research is a quasi-experimental using a counterbalanced design with a Post-test Only Control Design research, which was carried out in two research sessions. The study population was all students of SMP Negeri 21 Bulubonggu. The sampling technique was purposive. In the first session, the science process skills scores of the experimental class 1 students were 56.40, the experimental class 2 students were 37.95, while the experimental class 1 students' learning outcomes were 70.00, and the experimental class 2's average was 54.50. The results of the independent-sample parametric t-test of science process skills were obtained, p = 0.001, and the learning outcomes obtained were p = 0.000, so that H0 was rejected. The second session of the science process skills scores of the experimental class 1 students obtained an average of 60.60, the experimental class 2 was 72.80, and the learning outcomes of the experimental class 1 students were an average of 62.00, the experimental class 2 was 74, 00. The results of the independent-sample parametric t-test for science process skills were obtained, p = 0.043; the learning outcomes obtained were p = 0.042, so that Ho was rejected. It means that (1) there is an effect of the project-based learning model on students' science process skills, and (2) there is an effect of the project-based learning model on student learning outcomes.
The Effect of Purple Sweet Potato (Ipomea Batatas L.) Fermentation Time on Carbohydrate and Protein Levels Nurul H. Alwi; Tahril Tahril; Baharuddin Hamzah; Arwansyah Arwansyah
Jurnal Akademika Kimia Vol. 14 No. 2 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i2.pp118-122

Abstract

Yogurt is a fermented milk product produced by Lactobacillus bulgaricus and Streptococcus thermophilus, which confer a distinctive sour taste. Lactic acid bacteria require a carbohydrate source during growth, which can be obtained from purple sweet potatoes. This study aimed to determine the effect of fermentation time on carbohydrate and protein levels in purple sweet potato yoghurt. This study comprises 3 samples: sample A (yoghurt fermented for 7 hours), sample B (yoghurt fermented for 14 hours), and sample C (yoghurt fermented for 21 hours). The study employed a quantitative design, with carbohydrate testing using the Luff-Schoorl method and protein testing using the Kjeldahl method. The carbohydrate content was 10.36% in sample A, 10.41% in sample B, and 10.02% in sample C; the protein content was 2.23% in sample A, 3.93% in sample B, and 4,03% in sample C.
Implementation of Smartphone-Based E-Learning Modules to Enhance Understanding, Creativity, and Collaboration Among Students in Chemistry Saiful; Paulus Hengky Abram; Sitti Aminah; Tahril; Vanny Maria A Tiwow; Ratman
Jurnal Penelitian Pendidikan IPA Vol 12 No 7 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i7.15940

Abstract

This study aims to test the feasibility and effectiveness of implementing smartphone-based chemistry e-modules in enhancing high school students' understanding of the material, creativity, and collaboration. The research method used is pre-experimental with a one-group pretest-posttest design. The research sample consisted of 28 tenth-grade students at SMA Negeri 1 Tinombo, selected using purposive sampling technique. Data were collected thru instruments such as material comprehension tests, creativity tests, and collaboration observation sheets. The research results show that the implemented e-module meets the validity criteria with an average of 78% and is very practical to use, with a practicality score of 84.5% for teachers and 87.78% for students. The effectiveness analysis using the N-Gain test shows an increase in material understanding of 0.71 (high category). For student creativity, the N-gain value is 0.72, and for collaboration, it is reinforced by the teacher's observation results of 87.5%. Thus, it can be concluded that the smartphone-based e-module is effective in improving the quality of chemistry learning on nanomaterial topics.
Co-Authors Abdur Rahman Abdur Rahman Arif, Abdur Rahman Afadil Agustin Tiwow Alfian Noor Alfian Noor Alfian Tuba Arwansyah Arwansyah Arwansyah Arwansyah Arwansyah Awanda Awanda Baharuddin Hamzah Bijang, Catherina M. Budi Rahayu, Budi Catherina Bijang Daud Karel Walanda Dewi Sri Dinda Ulan Daini Dzakiyyah Syarifuddin Elsa RN Taminggu Esterlina, Meida Fransina, Eirene G. Hasanela, Nurani Hijrawati Hijrawati Ika ika Imran Imran Jamaludin M Sakung Joris, Shielda N. Kasmiati Kasmiati La O. Ahmad Laode A. Kadir Matheis F. J. D. P. Tanasale Maulidiyah Maulidiyah Meilan Kristina Pogoa Mery Napitupulu Minarni Rama Jura Moh. Raisul Muh Natsir Muh. Nurdin, Muh. Muhammad Agus Muljanto Muhammad Sulaiman Zubair Muslia, Wa O. Muzakkari, Muhammad Z. Nasriadi Dali Nohong Nohong Nur H. Wahyuni Nurmiati Nurmiati Nursiah La Nafie Nursiah La Nafie Nurul H. Alwi Olivia Inrawati I. Somang Paulina Taba Paulina Taba Paulus Abram Paulus H. Abram Paulus Hengky Abram Purnama Ningsih Putri Ramdani Ratman Reny Reynaldi Tandi Saiful Sakung, Jamaludin Musa Setyanto Tri Wahyudi Siska D. Wulandari Siti Nuryanti Siti Nuryanti Sitti Aminah Sitti Aminah Sitti Rahmawati sri H. V Pulukadang Sri Hastuti Sri Mulyani Sri Mulyani Sabang Sri Sabang Suherman Suherman Tehuayo, Ahmadin THAMRIN AZIS Tri Santoso Ulfa H. Syam Ulfiana Ulfiana Vanny Maria A Tiwow Vany Tiwow Winarsyih Muhidin Wiwik Handayani Yanti Yama Yessi Febianti Manalu Yulvani Toiba