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Mardjan Paputungan
Universitas Negeri Gorontalo
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Other

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KINETIKA REAKSI HIDROLISIS PATI DARI BIJI DURIAN (Durio Zibethinus Murr) DAN BIJI NANGKA (Artocarpus Heterophyllus Lamk) MENGGUNAKAN KATALISATOR ASAM ASETAT (CH3COOH ). Yulianti, Yulianti; Suleman, Nita; Paputungan, Mardjan; Alio, La
Jambura Journal of Chemistry Vol 6, No 1 (2024): February
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jambchem.v6i1.17094

Abstract

Tujuan penelitian ini adalah mempelajari laju konversi hidrolisis pati dari biji durian (Durio zibethinus murr) dan biji nangka (Artocarpus heterophyllus Lamk) menjadi glukosa. Pada hidrolisis menggunakan analisis kuantitatif dengan metode luff schoorl dengan bantuan katalisator asam asetat (CH3COOH) pada berbagai variasi suhu yaitu 70,80,90oC dan waktu 1,2,3,4,5, dan 6 jam. Hasil penelitan menunjukkan bahwa orde reaksi hidrolisis pati menjadi glukosa adalah orde I, hal ini didukung dengan analisis k yang relatf konstan pada suhu 70,80,90oC dan waktu 6 jam pada pati biji durian yaitu krata-rata = 0,0117 jam-1, dari data ini kadar pati yang didapatkan pada biji durian adalah 68,61% dengan konversi 3,48% glukosa dan pada biji nangka krata-rata = 0,0100 jam-1 dengan kadar pati 79,01% dengan konversi 3,36% glukosa. Dengan demikian dapat disimpulkan bahwa laju konversi hidrolisis pati menjadi glukosa adalah r = k[pati]1. Kata kunci: Glukosa, pati biji durian, pati biji nangka, laju konversi.
Computational Study of Phytopharmaceutical Antidiabetes Potential of Gorontalo Traditional Medicine Plants La Kilo, Akram; Aman, La Ode; Asisah, Asisah; Ischak, Netty Ino; Paputungan, Mardjan; Alio, La
Jurnal Kartika Kimia Vol 6 No 1 (2023): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v6i1.202

Abstract

Diabetes Mellitus (DM) was a disease characterized by the occurrence of hyperglycemia. This study aimed to analyze the activity of compounds in traditional medicinal plants as potential anti-diabetic candidates using the MM method and to analyze the interactions of compounds contained in traditional medicinal plants that could be used as anti-diabetic drugs. The methods used were Molecular docking and Molecular dynamics, with the Aldose reductase 2HV5 receptor and the ligand ZST. Based on the research findings, the active compounds identified as potential anti-diabetic drugs were Calebin_A and alpha_tocotrienol. Docking method validation on Protein 2HV5 using the natural ligand ZST showed an RMSD of 0.66 Å. The best results from molecular docking were obtained with Calebin_A, which had a binding affinity of -11.3 kcal/mol, and alpha_tocotrienol, which had a binding affinity of -11.2 kcal/mol. The results of the molecular dynamics method on the best complexes were evaluated by considering the changes in system energy, system temperature, pressure, RMSD, RMSF, and binding free energy (∆G). The standard ligand ZST had a value of -30.43 kcal/mol, the test ligand calebin_A had a value of -34.48 kcal/mol, and alpha_tocotrienol had a value of -39.46 kcal/mol.
Identifikasi Pemahaman Konsep Siswa pada Materi Hidrolisis Garam di Kelas XI SMA Negeri 3 Gorontalo Menggunakan Test Diagnostik Three Tier Multiple Choice Mardjan Paputungan; Mangara Sihaloho; Erga Kurniawati; Karmila B. Enu
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 2 No. 5 (2024): September: Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan A
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v2i5.189

Abstract

This research aims to determine student’s conceptual understanding of salt hydrolysis in 11th grade at SMA Negeri 3 Gorontalo using a three-tier multiple-choice diagnostic test. This research employs qualitative descriptive research, with the subjects being 156 students from the 11th grade chemistry class at SMA Negeri 3 Gorontalo. Data was collected using a three-tier multiple-choice diagnostic test consisting of 20 question. The results indicate that, on average, students only understand 18,12% of the salt hydrolysis concept, 43,54% of students experience misconceptions and 38,34% do not understanding the concept. From the identifikation results, the highest level of conceptual understanding was found in indicator 1, which determines the acidic and basic properties of salt-forming compounds, with a percentage 21,66%. The highest level of miskonceptions was found in indicator 2, which analyzes the properties of hydrolyzed salts, with an average of 54,03% and the highest level of lack of understanding was found in indicator 4, which calculates the pH of a hydrolyzed salt solutions, with an average of 47,4%. Overall, it can be stated that 81,88% of students do not correcly understand the material on salt hydrolysis. The indicates that students’ conceptual understanding of salt hydrolysis is very low.
Investigating Pt/Pumice catalyst for efficient 3-methyl-1-butanol conversion Paputungan, Mardjan; La Kilo, Akram
Acta Chimica Asiana Vol. 7 No. 2 (2024)
Publisher : The Indonesian Chemical Society, Chapter Nusa Tenggara and The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v7i2.162

Abstract

The objective of this study was to obtain a modified Pt/pumice catalyst to support the conversion reaction of 3-methyl-1-butanol under specific reaction conditions. To achieve this objective, the first step involved preparing modified pumice catalyst pellets by impregnating them with Pt metal followed by activation at a temperature of 500 °C. The second step involved characterizing the Pt/pumice catalyst, including the surface distribution of Pt metal using SEM. The third step involved conducting the catalyst activity test against 3-methyl-1-butanol in a reactor (furnace) at temperatures ranging from 400 to 500°C with a flow system for the feed. The fourth step involved analyzing the conversion results using GC-MS chromatograms. The research results showed that the Si/Al ratio in the modified Pt/Pumice catalyst using a PtCl4 solution with a concentration of 0.0321 M for impregnation was 4:1, compared to 4.8:1 for Pt/Zeolite and 3.2:1 for Pt/ABP. The modified catalyst activity test for 3-methyl-1-butanol showed the following conversion results: Pt/Pumice 27.63%, Pt/Zeolite 23.85%, Pt/Black Pumice 14.81%, and for platinum catalyst, the conversion was 22.35%. These results indicated that the highest conversion was observed in the treated sample A-3 under the reaction condition of 450°C. The conversion products analyzed using GC-MS showed the presence of three molecules: 3-methylbutanal, 2-methylbutanal, and anhydrous isobutanoate.
Analisis Kadar Logam Berat Timbal (Pb), Kadmium (Cd), dan Merkuri (Hg) pada Sayuran Selada (Lactuca Satiya L.) yang Beredar di Pasar Sentral Kota Gorontalo Merlin Darise; Ishak Isa; Mardjan Paputungan; Netty Ino Ischak; Erni Mohamad; Nita Suleman
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 1 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i1.348

Abstract

The purpose of this study was to determine the results of the analysis of heavy metal levels of Pb, Cd, Hg found in lettuce in the Central market of Gorontalo city. In this study, the object of research was the roots, stems and leaves of lettuce. The method used was wet deconstruction method using a mixture of HNO3 and HCl. After that the solution was cooled, then filtered. The sample solution that has been deconstructed is analysed by UV-Vis Spectrophotometry. The results of the analysis showed that there was heavy metal Pb in the root, stem and leaf lettuce samples of 2.54 mg / kg, 1.58 mg / kg, 2.28 mg / kg / respectively. Cd heavy metal levels of 0.07 mg/kg, 0.60 mg/kg, 0.65 mg/kg. Hg heavy metal levels of 2.09 mg/kg, 0.21 mg/kg, 0.44 mg/kg. Based on the 2018 Food and Drug Administration regulations, the value of Pb metal content is 0.20 mg/kg, the value of Cd content is 0.05 mg/kg, and the value of Hg content is 0.03 mg/kg.
Pengaruh Model Pembelajaran CERDAS terhadap Hasil Belajar Siswa pada Materi Nanoteknologi di Kelas X SMA Negeri 7 Prasetya Gorontalo Zulfa K Muslimin; Mangara Sihaloho; Mardjan Paputungan; Julhim S. Tangio; Erni Mohamad; Thayban Thayban
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 1 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i1.380

Abstract

This research aimed to examine the effect of the CERDAS learning model on student learning outcomes. The research employed a quasi-experimental method with a non-equivalent prest-posttest control group design. The sample consisted of students from class X Merdeka 3, serving as the experimental group, and class X Merdeka 1 as the control group. Both from SMA Negeri 7 Prasetya Gorontalo. These classes were selected using purposive sampling. The research instrument was an objective test. The results revealed a significant difference in the average scores between the experimental and control classes. Specifically, the average student learning outcome in the experimental group was 79,77, while in the control group, it was 67,27. Hypothesis testing using the t-tes yielded tcount value > ttable, indicated the tcount (2,99) was greater than the ttable value (2,01), which led to the rejection of H0 and confirmation of H1, Confirming that the CERDAS learning model had a significant effect on student learning outcomes. Additionally, the N-Gain test showed a moderate effect (0,68), indicating that the CERDAS learning model is fairly effective in improving student learning outcomes.
Co-Authors Abas Agus Said Akram La Kilo Arviani Arviani Asisah, Asisah Astin Lukum Botutihe, Deasy N. Damayanti, Elok Deasy Natalia Botutihe Erga Kurniawati Erni Mohamad Fadila Linggama Fadilah Alawiya Paputungan Harsya Wiriawan Dilapanga Helda Olii Hendri Iyabu Ipilo, Sri Rahayu Ishak Isa Ishka Isa Jafar La Kilo Julhim S Tangio Julhim S. Tangio Karmila B. Enu Kostiawan Sukamto, Kostiawan La Alio La Ode Aman Mangara Sihaloho Merlin Darise Monoarfa, Wanda Najmi Abdjul Netty Ino Ischak Nita Suleman Novendra S Abas Nur'afni Suaib Nuramna Rauf Nurhayati Bialangi Nurpatima, Nurpatima Nusi, Leni Opir Rumape Palari, Nuraini Rabudin, Lisdamayanti Ririn S. Sabora Risciana Yusuf Riskah Fitriani Adam Risma Malakah Siti Nurhaida AR Salam Suleman Duengo Syarbin, Ruslun A. R. Thayban Thayban Verayana, Verayana Wa Ode Santi Mekar Weny J.A Musa Wiwin Rewini Kunusa Yulia Rahman Yunus Yulianti Yulianti Yusuf, Novalita Yuszda K Salimi Zainal, Sriyanti Zulfa K Muslimin Zulpianti, Zulpianti