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All Journal Edumatsains Jurnal Pendidikan Kimia (JPKim) AL-HAYAT: Journal of Biology and Applied Biology Jurnal Pendidikan Fisika dan Teknologi Jurnal Darma Agung Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Agrica Ekstensia Jurnal Pengabdian kepada Masyarakat Nusantara JURNAL PENDIDIKAN SAINS SOSIAL DAN AGAMA Indonesian Journal of Chemical Science and Technology Jurnal Nuansa Akademik: Jurnal Pembangunan Masyarakat Jurnal ComunitA Servizio Edu Cendikia: Jurnal Ilmiah Kependidikan Jurnal Kajian Ilmu Pendidikan (JKIP) Jurnal Ilmu Pendidikan Indonesia Lensa: Jurnal Kependidikan Fisika PKM Maju UDA Pengembangan Penelitian Pengabdian Jurnal Indonesia (P3JI) Journal of Community Service Jurnal Abdimas Mahakam
Irving Josafat Alexander
Universitas HKBP Nommensen
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Journal : Edumatsains

 1 
Analysis of Bound Carbon Content and Combustion Rate of Banana Peel Waste Biobriquettes Irving Josafat Alexander; Gloria Sirait; Ramlan Silaban; Timotius Agung Soripada; Sunggu Sirait; Adriel Yakobus Nathaniel
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 10 No 2 (2025): October
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v10i2.6783

Abstract

This study aims to analyze the fixed carbon content and combustion rate of briquettes made from banana peel waste as a renewable energy alternative. The experimental method was used, involving key stages such as material preparation, carbonization process, briquette molding, and testing of fixed carbon content and combustion rate. The results showed that the fixed carbon content of the produced briquettes reached 87%, indicating good combustion quality and high energy storage capacity. Additionally, the combustion rate of the briquettes varied, with Sample A having a combustion rate of 0.017 grams/s and Sample B at 0.014 grams/s. This difference suggests that Sample B has a longer combustion duration. Thus, banana peel briquettes have the potential to be an efficient and environmentally friendly alternative fuel. Further research is needed to optimize the production process and enhance briquette efficiency.
Antimicrobial Activity Test of Alkaloid Rich Extract from Morinda citrifolia Leaves Against the Growth of Pathogenic Bacteria Staphylococcus aureus and Escherichia coli Josafat Alexander, Irving; Surbakti, Mariana; Sirait, Gloria; Silaban, Ramlan
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 10 No 4 (2026): April
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v10i4.8043

Abstract

This study aims to analyze the antimicrobial activity of alkaloid compounds from noni leaf extract (Morinda citrifolia) against the growth of pathogenic bacteria Staphylococcus aureus and Escherichia coli. The study applied a quantitative experimental laboratory approach. Extraction was carried out using the maceration method with 96% ethanol, followed by qualitative phytochemical analysis using Mayer, Dragendorff, and Wagner reagents to identify the presence of alkaloids. Using the Kirby-Bauer disk diffusion method, the antibacterial efficacy was evaluated at concentrations of 25%, 50%, 75%, and 100%. The primary indicator utilized was the size of the regions where bacteria could not thrive. Basic statistics and ANOVA analyses were utilized for data assessment. About 10.45% of alkaloids were found in the results. As the extract concentration grew, the quantity of bacterial development arrested did as well. The most notable impact was observed at the 100% concentration, with no growth zones of 18.9 mm for S. aureus and 15.8 mm for E. coli. The extract was more effective against Gram-positive bacteria. With p values less than 0.05, the statistical analysis found significant variations among the various treatments. Finally, the alkaloids found in noni leaves have a lot of potential to work as natural antibacterial agents and could be a substitute to fight antibiotic resistance.
Co-Authors Adriel Yakobus Nathaniel Bajongga Silaban, Bajongga Bangun Tampubolon Bangun Tampubolon Dewi Paulina Silalahi ESRIDA HUTAHAEAN Fajar Gohanda Sinaga FELIA MUTIARA HUTAPEA Freddy Tua Musa Panggabean Ginting, Rindang Leni Saputri Gloria Sirait Goldbert Harmuda Duva Sinaga halawa, analiser Harita, Taufik Hidayat Hersakso Sinurat Hotman Manurung Irmadayanti Sagala Juliaster Marbun Justinos Ray Nainggolan Lampola Sitorus Lena Rosdiana Pangaribuan Lukman Pardede Manalu, Judika Marbun, Juliaster Marham Sitorus Mariana Br. Surbakti Mariana Br. Surbakti Marpaung, Rince Melhyada Veronika Panggabean Miranda, Xenia S. Monalisa Martha Siahaan MULA SIGIRO Nababan, Melissa Febristira Naibaho, Benika Nainggolan, Justinos Ray Osi Annauli Br Girsang Pandiangan, Samse Pardede, Dewi Lestari Pardede, Hebron Patricia Rohana Septiana Simarmata Pelita Ananda Sianturi Prasetyo, Retno Agung Purba, Jusbinaraya Purba, Melfa Uli Magalena Ramlan Silaban Ray Nainggolan, Justinos Riza Manullang Roselva Theresia Manalu Sagala , Irmadayanti Samse Pandiangan Sary Marcella Sitompul Siahaan, Kristina Lestari Sihite, Muda Sakti Raja Sijabat, Naomi Christine Silitonga, Suryani Simatupang, Iin Melinda Simson Tarigan Sinaga, Mardame Pangihutan Sitinjak , Erni Kusrini SITINJAK, ERNI KUSRINI Sunggu Sirait Sunggu Sirait Surbakti, Mariana Br Suryadi Hotma Roganda Mahulae Susanti Timotius Agung Soripada Vivi Hutapea