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Sanusi Gugule
Universitas Negeri Manado
Religion Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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PENGARUH MEDIA PEMBELAJARAN WEB WORDWALL TERHADAP HASIL BELAJAR SISWA PADA MATERI TERMOKIMIA DI SMA KOSGORO TOMOHON Assa, Christiano; Gugule, Sanusi
Oxygenius: Journal Of Chemistry Education Vol 7 No 1 (2025): Oxygenius : Journal Of Chemistry Education
Publisher : Chemistry Department, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/ojce.v7i1.735

Abstract

A study has been conducted on the influence of web-based learning media Wordwall on student learning outcomes in thermochemistry material at SMA Kosgoro Tomohon. The research method used is Pretest-Posttest Control Group Design, involving 15 students of class XI A as the experimental class and 15 students of class XI B as the control class, while the t-test is carried out. Wordwall media is applied in the learning process to improve student understanding and involvement interactively in the experimental class. Based on the results of the study and discussion, it shows that the use of Wordwall has an effect on student learning outcomes, as shown through the research data, namely the average value of the experimental class of 76.19 is higher than the control class with an average of 65.96 and continued with a t-test with the help of SPSS software, a significance level value of 0.012 <α (0.05) was obtained. Therefore, this study shows a significant influence between Wordwall web media on student learning outcomes in thermochemistry material at SMA Kosgoro Tomohon. Therefore, Wordwall learning media is recommended as an innovative alternative to support the learning of complex chemical materials such as thermochemistry.
Pengaruh Katalis Terhadap Rendemen Reaksi Transesterifikasi Br Tarigan, Romi Yana Widiawati; Gugule, Sanusi; Tuerah, Jeanne Maria; Maanari, Chaleb
Jurnal Kimia Fullerene Vol 8 No 2 (2023): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v8i2.494

Abstract

Research has been carried out on the effect of a catalyst on the yield of transesterification reactions. Pure coconut oil is made mechanically without heating using fresh coconut meat or what is called non-copra, followed by a base-catalyzed transesterification reaction using KOH and NaOH. The purpose of this study was to determine the effect of the catalyst on the yield of the transesterification reaction. The results of the reaction were analyzed by determining the physico-chemical properties and analysis of Gas Chromatography-Mass Spectrometry (GC-SM). The results showed that the average reaction yield with KOH catalyst was 74.3% and 70% NaOH catalyst. The most dominant GC-SM identification results were ethyl caproate 4.12%, ethyl capricate 4.99%, ethyl laurate 54.97%, ethyl myristate 18.49%, ethyl palmitate 8.13%, 9.12 octadecatrin-1-ol 5.24% and ethyl strearate 2.28%.
Impact of Ferric Chloride–Induced Oxidation on the Physicochemical Characteristics of Chicken Fat and Its Biodiesel Maanari, Chaleb P.; Gugule, Sanusi; Fatimah, Feti; Rumengan, Stefan M.; Utami, Aisyiah R. P.; Mustapa, Mustapa; Sidabukke, Indah U. Br.
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.pp17-24

Abstract

Background/problems: Biodiesel from animal fats is vulnerable to metal-catalyzed oxidation that degrades fuel quality because of the unsaturated fatty acid content. This study investigates the oxidative stability and physicochemical changes of chicken fat and its biodiesel upon FeCl₃-catalyzed oxidation. Methods: Chicken fat was transesterified to produce biodiesel; chicken fat (CF) and chicken-fat biodiesel (CF-BD) were then subjected to an FeCl₃ oxidative condition. Acid value (AV), iodine value (IV), peroxide value (PV), kinematic viscosity at 40 °C, and density were determined using standard titrimetric and physical methods; FTIR assessed spectral changes. ANOVA compared group means. Findings: Oxidation significantly increased AV and PV for both matrices, with a marked PV rise in CF-BD (6.17 ± 0.29 to 88.17 ± 5.35 meq/kg), and decreased IV (CF-BD 84.3 ± 4.51 to 48.7 ± 4.32 g I₂/100 g). Viscosity and density increased modestly. Visually, CF-BD shifted from clear yellow-green to brown and turbid with sediment, consistent with polymer formation and methyl-ester degradation. FTIR showed attenuation/shift of ester carbonyl and aliphatic bands. Conclusion: FeCl₃-induced oxidation measurably deteriorates CF-BD quality, breaching key limits in ASTM/SNI for acid value and viscosity. Impact: Results underscore the need to control trace metals and apply antioxidant/metal-deactivator strategies in storage and distribution, and validate the FeCl₃ assay as a practical accelerated-degradation model for stability and additive screening.
Co-Authors Adrian Dungir Aisyiah Restutiningsih Putri Utami Anderson Arnold Aloanis Aror, Carolina Gabriella Gracilia Assa, Christiano Audy Denny Wuntu Br Tarigan, Romi Yana Widiawati Chaleb Paul Maanari Dalvian Taroreh Daniel Defrid Devid Manopo Djois Sugiaty Rintjap Dokri Gumolung Fachry Abda El Rahman Feti Fatimah Gustafo Johansen Wilar I Dewa Ketut Anom I Dewe Ketut Anom Jacklin S.S. Manoppo Jakub Saddam Akbar Jane Sulinda Tambas Jeanne M. Tuerah Johanis J. Pelealu Johnly Rorong Johny Zeth Lombok Lestari, Endang Putri martha tuganyita Miftahul Jannah Musma Rukmana Mustapa Mustapa Mustapa, Mustapa nia yuniar kandou Pomalingo, Moh Fikri Pratiwi, Ananta Dian Ratih Anita Memah Revfly I.F. Gerungan Sakul, Ernest Hanny Sandra Lewa Semuel Gideon Rommy Kosegeran Sidabukke, Indah U. Br. Stefan Marco Rumengan Syahriyani Timin Trina E. Tallei Trina Tallei Utami, Aisyiah R. P. Watuseke, Rommy David Yohana Tandi