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All Journal JPMS (Jurnal Pendidikan Matematika dan Sains) Jurnal Pendidikan Matematika dan IPA Sains Olahraga : Jurnal Ilmiah Ilmu Keolahragaan TABULARASA Jurnal Tematik Jurnal Ilmu Pendidikan Indonesia PROSIDING SEMINAR KIMIA Edumatsains Chemistry in Education Lantanida Journal Jurnal Obsesi: Jurnal Pendidikan Anak Usia Dini Jurnal Penelitian Kesehatan Suara Forikes Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Pendidikan Kimia (JPKim) EKSAKTA : Jurnal Penelitian dan Pembelajaran MIPA Pendas : Jurnah Ilmiah Pendidikan Dasar AL-HAYAT: Journal of Biology and Applied Biology Efektor ALKIMIA : Jurnal Ilmu Kimia dan Terapan Ideas: Jurnal Pendidikan, Sosial dan Budaya Jurnal Paedagogy Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Budapest International Research and Critics in Linguistics and Education Journal (Birle Journal) Indonesian Journal of Chemical Science and Technology Khazanah Intelektual Didaktika: Jurnal Kependidikan Jurnal ComunitA Servizio Seminar Nasional Peningkatan Mutu Pendidikan KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Jurnal Warta Desa (JWD) Jurnal Penelitian Sains dan Pendidikan (JPSP) Educenter: Jurnal Ilmiah Pendidikan Jurnal Pijar MIPA Jurnal Ilmu Pendidikan Indonesia JURNAL PENELITIAN BIDANG PENDIDIKAN Duconomics Sci-meet (Education & Economics Science Meet) Mahir : Jurnal Ilmu Pendidikan dan Pembelajaran JIPI (Jurnal IPA dan Pembelajaran IPA) Proceeding of International Conference on Multidisciplinary Research EDUCENTER JURNAL PENDIDIKAN Jurnal Pendidikan Sains dan Teknologi Terapan Jurnal Cendekia Ilmiah Prosiding Seminar Nasional Keguruan dan Pendidikan (SNKP) Proceeding of The International Conference on Mathematical Sciences, Natural Sciences, and Computing
Ramlan Silaban
Chemistry Education, Faculty Of Mathemathics And Natural Science, Universitas Negeri Medan, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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PENYEDIAAN BAHAN AJAR INOVATIF HIDROKARBON BERBASIS PROBLEM BASED-LEARNING TERINTEGRASI KEARIFAN LOKAL MINYAK KARO: penelitian pendidikan kimia Silaban, Ramlan; lespiani, ika; Daulay, Rabiah; Ginting, Elfrida; Sitorus, Marham
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 10 No. 03 (2025): Volume 10 No. 03 September 2025
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v10i03.31785

Abstract

The problem raised in this study is related to the way of teaching and learning in the classroom which is still teacher-oriented and the learning resources used have not connected the material with everyday life situations. This study aims to design a hydrocarbon learning module that links the local wisdom of Karo oil using the Problem Based Learning (PBL) approach. The method applied is Research and Development (R&D) with the 4D development model (Define, Design, Development, Disseminate). Evaluation of the module's feasibility was carried out by media experts, material experts, and chemistry teachers, and also through student responses. The results of the study showed that the module met the requirements for use in SMA Negeri 2 Kabanjahe, with a high average validation percentage. Student responses showed that this module was effective in increasing their interest and motivation in studying hydrocarbon material.
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.
Development of an E-Module Based on the SAVI Learning Model on the Topic of Buffer Solutions Cecilia Sijabat; Ramlan Silaban; Eddiyanto; Haqqi Nasution; Susilawati Amdayani; Irving Alexander; Dimas Ridho
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 10 No 1 (2025): July
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v10i1.6784

Abstract

The purpose of this research focuses on the development of electronic modules (e-modules) based on the SAVI (Somatic, Auditory, Visual, and Intellectual) learning model, which specifically targets high school students studying buffer solution materials. This research uses the 4-D model development framework, including the defining, designing, and developing stages. Initial needs analysis showed a significant gap in the utilization of electronic learning media at SMA Negeri 1 Pancur Batu. The resulting e-module consists of 39 pages and is designed to meet diverse learning styles through interactive elements and multimedia aids. Validation by experts showed that the e-module was very feasible, with an average value of 78.37% material expert assessment and 88.3% media expert assessment. In addition, feedback from teachers and students showed strong engagement and effectiveness, with an average teacher assessment score of 90.75% and 89% average student assessment. This research highlights the importance of integrating modern technological advances into chemistry education to improve student learning outcomes. Keywords: Development, E-module, Buffer solution, SAVI
Analysis Relationship between Free Fatty Acid and Peroxide Values in Crude Palm Oil Industry Ramlan Silaban; Marta Adeliana Sijabat; Afrilita Harahap; Timotius Agung Soripada; Marham Sitorus; Eddiyanto; Ahmad Nasir Pulungan
ALKIMIA Vol 10 No 1 (2026): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/x133fg91

Abstract

Crude Palm Oil (CPO) is crude palm oil extracted from the palm oil industry that has not undergone a refining process. CPO quality is considered good if it meets applicable quality standards. This study aims to determine a mathematical equation model that describes the relationship between free fatty acid value (FFA) quality parameters and peroxide value (PV) in CPO samples. FFA content analysis was carried out using the alkalimetric titration method, while the peroxide value was tested using the iodometric titration method. The storage time variations used were 0 - 3 weeks. The results showed that : (1). The sample consist Free Fatty Acid value (FFAV)  were 2.97%; 3.22%; 3.41%; and 3.66%, respectively, with an average of 3.31%. Meanwhile, Peroxyde Value (PV)  ​​were obtained at 1.85; 2.25; 2.65; and 3.04 meq O₂/kg. (2). According to these results, the FFAV content still meets the Indonesian National Standard (SNI) standard (<5.0%) and the PV value is also below the SNI limit (<10 meq O₂/kg). (3). The mathematicals model of relationship between FFAV shows a significant effect with a linear regression equation of Y = 0.436x + 0.0221 and a determination value (R²) of 0.0976. (4). This model indicates that an increase in FFA levels is directly proportional to an increase in peroxide value. The mathematical model obtained illustrates that an increase in PV is in line with an increase in FFA levels, both of which play an important role in determining the quality stability and storage durability of CPO.
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.
Application of Scientific Approach-Based Learning Assisted by Question Cards and Ladder Snake Media for Evaluating Learning Outcomes Sio Tuti Gultom; Rafles Sinaga; Ramlan Silaban
Jurnal Penelitian Pendidikan IPA Vol 9 No 10 (2023): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i10.2633

Abstract

This study aims to determine the differences in student learning outcomes by applying to learning using question cards and snakes and ladders media through a scientific approach to the topic of acid-base discussion. Ultimately, the evaluation of improving the learning outcomes of students by learning using question cards and ladder snake media through a scientific approach to the topic of acids and bases is reported in this study. The population in this study were all students of class XI MS SMA Negeri 20 Medan, total three classes. The sample was taken by purposive sampling in two classes. The first class was experimental I, taught using a scientific approach using question cards, and the second class was experimental class II, conducted using a scientific approach using snakes and ladders. Each experiment class consists of 32 students. The research instrument was a multiple choices objective test instrument of 25 questions which had been tested for validity, reliability, discriminating power, and level of difficulty for learning outcome data. Test the first hypothesis using a two-party t-test, and SPSS 21 (independent samples t-test) results obtained for experimental class I with a tcount value of 32.320 > ttable 1.70. In contrast, the experimental class II has a tcount value of 31.231 > ttable 1 .70 at a significance level of 0.000 < 0.05. The second hypothesis test using the proper side t-test and in SPSS 21 (paired samples t-test) obtained a mean of 5.000 and a t-test value of 2.648 with a sig value of 0.010 <0.05.
NEEDS ANALYSIS FOR THE DEVELOPMENT OF E-MODULE TEACHING MATERIAL BASED ON PROJECT BASED LEARNING (PJBL) INTEGRATED WITH LOCAL WISDOM ON ACID-BASE MATERIAL Christin Silaen, Feny; Ramlan Silaban
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 No. 2, Juni 2026
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.56835

Abstract

Chemistry learning, especially in acid-base materials, is often considered difficult to understand because it is abstract and less associated with the context of students' daily lives. In addition, the implementation of Project Based Learning (PjBL) and the integration of local wisdom in chemistry learning at SMA Negeri 2 Percut Sei Tuan has not been carried out optimally. This research aims to develop an e-module of acid-base chemistry materials that is integrated with local wisdom of cassava tapai and based on Project Based Learning (PjBL), as well as to determine its feasibility level. This research uses the Research and Development (R&D) method with a 4D development model which includes the Define, Design, Develop, and Disseminate stages. The research was carried out in the even semester of the 2025/2026 school year by involving 36 students of class XI of science. At the development stage, validation was carried out by two lecturers of Chemistry Education at Medan State University and one chemistry teacher. The results of the validation of material experts obtained an average percentage of 88.25% and the results of the validation of media experts of 90.49%, both of which are included in the very feasible category. At the dissemination stage, the results of students' responses obtained an average percentage of 87.61% with the very good category, while the teacher's responses obtained an average percentage of 93.30% with the very good category. The results of the study showed that the e-modules developed met the criteria were very feasible and received excellent responses from students and teachers. Thus, the chemistry e-module of acid-base material that is integrated with local wisdom of cassava tapai and based on Project Based Learning (PjBL) is suitable for use as supporting teaching materials in chemistry learning. Keywords: e-module, local wisdom, Project Based Learning (PjBL), Acid-base, Tapai
Co-Authors A&#039;in Donasari Adriel Yakobus Nathaniel Afni, Khairul Afrilita Harahap Ahmad Nasir Pulungan Ajat Sudraja Ajat Sudrajat Ajat Sudrajat Akmalia, Nur Albinus Silalahi Andalia Asmi Anna Juniar Aristo Hardinata Asmi, Andalia Ayi Darmana Bajoka Nainggolan Bajoka Nainggolan Boni Mariska Ratnawati Br Singarimbun, Veronica Liasta Bronika Septiani, Bronika Cecilia Sijabat Chintia Dewi Sukri Christin Silaen, Feny Cintia Fitriani Rumapea Cintia Fitriani Rumapea Daulay, Rabiah David Frans Pardamean Sihombing Day Dosmayhot Simaremare Delanining Saragih Deni Rahman Marpaung Devi Anriani Siregar Dewi Susanti Dewi Syafriani Dian I Sinurat Dimas Ridho Eddiyanto Eddiyanto Eddiyanto Eddiyanto Effi Nurma Husnitha Elisabet Singarimbun Elsa Ginting Elvana, Ayu Erni Juliani Siregar ESRIDA HUTAHAEAN Ester Manalu Eva Fadillah Evi Irianti Fauziah Fauziah Fauziyah Harahap Fauziyah Harahap FELIA MUTIARA HUTAPEA Freddy T.M. Panggabean Freddy T.M. Panggabean Freddy Tua Musa Panggabean Ginting, Elfrida Gloria Sirait Grace Octavia Hutasoit Gultom, Erdiana Haqqi Nasution Hasibuan, Desy Rahmayanti Hendra Simanjuntak Hendro Pranoto Herla Rusmarilin Herlina, Emmi Silvia Herry Purwanto Panjaitan Hersakso Sinurat Hilda Pratiwi Ida Duma Riris Ida Duma Riris Iis Siti Jahro Iis Siti Jahro Iis Siti Jahro Iis Siti Jahro Iis Siti Jahro Indra Lasmana Tarigan Indrayani, Lisa Inki Yun Lamtiur Irving Alexander Irving Josafat Alexander Julia Mardhiyah Justinos Ray Nainggolan Khairani Fitri Kiki Ledya Laila Tussifah Lubis lespiani, ika Lusyana Rahman Lusyana Rahman Mahmud Mahmud Mahmud Mahmud Mandike Ginting Manihar Situmorang Manihar Situmorang manihar Situmorang, manihar Marham Sitorus Marham Sitorus Marham Sitorus Mariana Br. Surbakti Marianna E Pasaribu Marianna Pasaribu Marpaung, Fytry Vebiola Marta Adeliana Sijabat Martina Asiati Napitupulu Maryam Jamilah Melhyada Veronika Panggabean Melhyada Veronika Panggabean Mhd Burhan Anggara Mira Andriyani Molani Paulina Hasibuan Monalisa Martha Siahaan MONICA THERESIA Moondra Zubir Muhammad Iqbal Mutiara Agustina Nst Nababan, Santi Nainggolan4, Bajoka Napitupulu, Rahel Ronauli Kurniaasih Nina Mardiana (F01108057) Nunung Sri Mulyani Nurfajriani Nurfajriani Nur Nurfajriani Nurfajriani Nurfajriani Nurfajriani Nurfajriani Nurfajriani Nurfajriani, Nurfajriani Nurhayani Nurhayani Osi Annauli Br Girsang Pakpahan, Debora Pangondian Hotliber Purba Patricia Rohana Septiana Simarmata Pelita Ananda Sianturi Pelita Ananda Sianturi Purba, Friska Juliana Rabiah Afifah Daulay Rafles Sinaga Rahmadani Renata Hutagalung Retno Dwi Suyanti Retno Dwi Suyatni Rezki Maya Ananda Riza Manullang Riza Sahala Manullang Rizky Emiliya, Rizky Roselva Theresia Manalu Rosidah, Rosidah S Siswanto Salim Efendi Salim Efendi, Salim Salomo Hutahaen Samosir, Rafidah Almira Sandy Yudha Sandy Yudha Santri Angelia Damanik Sari, Richa Purmaya Saronom Silaban Saronom Silaban SARONOM SILABAN Sary Marcella Sitompul Sary MF Sitompul Sary MF Sitompul Shinta Rap Sitinjak Silalahi, Eka Kartika Simanjutak, Mariati Purnama Simatupang, Lisnawaty Simson Tarigan Sinaga, Rika Nailuvar Sio Tuti Gultom Sitinjak, Shinta Rap Sunggu Sirait Susilawati Amdayani Susilo Sudarman Syafruddin Ilyas Tambunan, Abai Manupak Tarigan, Anjany Tasya Surabika Timotius Agung Soripada Timotius Agung Soripada Tini Sulastri Tini Sulastri Trisna W Simanullang Trisna W Simanullang Vera Roni Setiawan Veronika Meiyuina Simatupang Vivi Hutapea Vivi Hutapea Wesly Hutabarat Wesly Hutabarat Wesly Hutabarat, Wesly Wulan Dwi Safitri Yudha, Sandy Yulia Fitri Zainuddin Muchtar Zulfahri, Zulfahri