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All Journal The Journal of Pure and Applied Chemistry Research Science and Technology Indonesia Molekul: Jurnal Ilmiah Kimia Bencoolen Journal of Pharmacy Rafflesia Journal of Natural and Applied Sciences (RJNAS)
Reagen, Muhamad Alvin
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Nursing Physics Public Health

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Molecular Spectroscopic (FTIR and UV-Vis) Analysis and In Vitro Antibacterial Investigation of a Deep Eutectic Solvent of N,N-Dimethyl Urea-Citric Acid Yudha S., Salprima; Angasa, Eka; Reagen, Muhamad Alvin; Kazi, Mohsin
Science and Technology Indonesia Vol. 9 No. 1 (2024): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.1.167-172

Abstract

The intriguing pursuit of environmentally friendly solvents with tailored properties for diverse applications is a focal point of numerous studies, encompassing precursor selection, thorough characterization, and the exploration of potential applications. The study aims to assess the physicochemical properties and antimicrobial activity of deep eutectic solvents (DES) produced from N,N-dimethyl urea (DMU) and citric acid (CA), highlighting differences from their individual precursors. Various mass ratio variations of (DMU, solid) and (CA, solid) (DMU:CA = 1.0:1.0; 1.0:1.5; 1.0:2.0; 2.0: 1.0; 1.5:1.0) have been tested to make DES solvents through the melt process. Both types of blends generally melt at a temperature of 80°C. The overall liquid resulting from the melting of solids was generally clear in color. Molecular analysis using an infrared spectrophotometer showed some insignificant shifts from one product to another, compared with DMU and CA as precursors. Likewise, analysis using a UV–Vis spectrophotometer, when the entire sample was dissolved in demineralized water (2 mg/mL), showed no difference in the spectrum. In addition, functional group analysis using a spectrophotometer showed some minor changes, mainly shifts in peaks due to changes in the DMU:CA ratio. This may be due to the interaction of the hydrogen donor and the hydrogen acceptor in DES. All samples showed absorption peaks in the ultraviolet region of 202-210 nm. The resulting DES application showed growth inhibitory activity for Staphylococcus aureus and Escherichia coli bacteria in all products produced. The same analysis of the two types of precursors used showed that only CA had activity, but DMU did not have similar activity.
Preparation of Oil Palm Leaves Ash-Supported Titania for the Elimination of Safranin-O Dye in Water Yudha S, Salprima; Adfa, Morina; Istiqphara, Swadexi; Falahudin, Aswin; Reagen, Muhamad Alvin
Molekul Vol 19 No 2 (2024)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2024.19.2.11078

Abstract

ABSTACT. The objective of this study was to develop an approach for incorporating titanium oxide or titania into oil palm leaves ash (OPLA) using a simple procedure. The study process comprised the mixing of oil palm leaves (OPL) powder and titanium tetraisopropoxide in chloroform solvent, followed by the elimination of the solvent to obtain a solid residue. Subsequently, the residue obtained was calcined at 500 °C for 5 hours, leading to the production of a yellow-light powder. The results of product characterization using X-ray diffraction (XRD) and scanning electron microscopy analysis showed the presence of titanium oxide in OPLA. In addition, the wide diffractogram detected in XRD analysis revealed the presence of a silica peak. The un-sharp peaks in the regions of 25.6°, 38.2°, 47.9°, 54.5°, and 62.9° showed that the TiO2 particles were pure anatase, and no peaks of other TiO2-anatase phases were detected. Analysis using SEM showed that the surface of the material obtained was irregular and tended to have a hollow shape, while energy dispersive X-ray analysis revealed a SiO2 content of approximately 73%. However, the titanium element or titania was not detected possibly due to its small concentration. The material obtained also had a good catalytic activity for safranin-O dye elimination under sunlight irradiation, which served as the activation energy source. Based on these findings, the use of OPLA (a side product of oil palm plantations) could be evaluated economically due to its effective role in the catalytic process despite the addition of a small amount of titania catalyst. Keywords: Oil palm leaves ash, titania, safranin-O, sunlight irradiation.
Silver-Palm Kernel Expeller Ash Formation by Combustion Technique and its Congo-red Removal Activity Yudha S, Salprima Yudha S; Nesbah, Nesbah; Mardlia, Zulfikri Achid; Ramadhani, Annisa; Reagen, Muhamad Alvin
The Journal of Pure and Applied Chemistry Research Vol. 13 No. 2 (2024): Edition May-August 2024
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2024.013.02.3341

Abstract

This study aims to synthesize silver-palm kernel expeller ash (PKE) composites using in-situ combustion at 600 °C. Compared to previous methods, the novel in-situ combustion was developed to easily obtain composites in the laboratory using simple procedures. The products obtained were characterized with X-ray diffraction (XRD) analysis. The results showed that the composites contained silver metal peaks and some peaks of a mixture of compounds predicted to be calcium phosphate, calcium hypophosphate, and other undetermined metal oxides. In addition, X-ray fluorescence (XRF) analysis showed the presence of several important minerals derived from PKE combustion. Composites obtained in this study showed better activity as catalysts in the removal of congo-red under sunlight irradiation compared to only PKE ash. Based on these results, the by-products of palm oil processing had the potential to be used for advanced materials preparation.
Efektivitas penambahan aditif sintetik dan aditif alami pada elektrodeposisi nikel : sebuah telaah pustaka Afif, Muhammad adli; reagen, Muhamad alvin; wiradimafan, Khafid; Adfa, Morina
RAFFLESIA JOURNAL OF NATURAL AND APPLIED SCIENCES Vol. 4 No. 2 (2024): Oktober
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rjna.v4i2.39408

Abstract

Penelitian ini bertujuan untuk mengetahui perbandingan dari pengaruh penambahan aditif sintetik dan alami pada elektrodeposisi nikel, Proses elektrodeposisi nikel merupakan reaksi elektrokimia yang melibatkan elektron yang disuplai oleh sumber arus searah. Reaksi terjadi pada permukaan elektroda. Ion-ion nikel dalam larutan akan tereduksi membentuk lapisan logam nikel di katoda, sedangkan di anoda akan terjadi reaksi oksidasi. Pengaruh aditif sebagai agen pereduksi selain memberikan pengaruh pada mikrostruktur deposit dapat meningkatkan jumlah arus sehingga dapat mempercepat terbentuknya deposit dan memberikan lapisan yang lebih tebal dan kilau. salah satu aditif sintetik adalah natrium lauril sulfat/sodium lauril sulfat, saccharin, Cetiltrimetilamonium Bromida, coumarin dan beberapa aditif alami antara lain Ektrak daun semanggi, Ekstrak daun Ketapang, ekstrak batang bakau, ekstrak buah kakao, dan brightener alami Daphne gnidium L.
Oil Palm Leaves as an In-situ Bio-silica Source in Sustainable Synthesis of V2O5-SiO2 Yudha S., Salprima; Adfa, Morina; Wibowo, Risky Hadi; Reagen, Muhamad Alvin
Science and Technology Indonesia Vol. 10 No. 4 (2025): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.4.1148-1155

Abstract

Using ammonium vanadate and natural silica from oil palm leaves in situ at 900oC is a sustainable synthesis method for producing V2O5-SiO2 mixed oxides in the form of a brownish powder. Therefore, this study aims to investigate a more environmentally friendly alternative to synthesizing V2O5-SiO2 using oil palm leaves, a by-product from oil palm farming. The XRD analysis of the reaction products showed specific V2O5 peaks and broadened peaks, indicating the presence of amorphous silica. The Fourier transform infrared (FTIR) analysis, which revealed the presence of Si-O-Si and Si-O-V functional groups, also supported the characteristic assessment. In addition, X-ray fluorescence (XRF) analysis showed that V2O5 (46.70 mass%) and SiO2 (52.60 mass%) were present, along with small amounts of other possible metal oxides, such as P2O5, K2O, CaO, Fe2O3, Al2O3, and PdO.
Fabrikasi Nanopartikel Emas Menggunakan Medium Ekstrak Kulit Buah Brucea javanica S, Sal Prima Yudha; Reagen, Muhamad Alvin; Asral, Suci Sukma Taruna; Andari, Diana; Daefisal, Octakireina Liesaini
BENCOOLEN JOURNAL OF PHARMACY Vol. 5 No. 2 (2025): Oktober
Publisher : UNIB PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/bjp.v5i2.42644

Abstract

Ekstrak kulit buah Brucea javanica digunakan dalam proses sintesis nanopartikel emas. Kulit buah yang digunakan yaitu kulit buah yang muda (Au-1) dan kulit buah yang tua (Au-2). Sebanyak 1 gram kulit buah yang sudah kering diektraksi menggunakan pelarut akua demineral sebanyak 100 mL selama 20 menit pada suhu 60 oC. Larutan HAuCl4 0,01 M digunakan sebagai prekursor nanopartikel emas yang dicampurkan dengan ekstrak dengan perbandingan 4 (ekstrak) : 1 (HAuCl4 0,01 M). Spektrum serapan UV-vis yang didapatkan Au-1 pada 553 nm dan Au-2 pada 564 nm. Hasil distribusi partikel didapatkan bahwa Au-1 menghasilkan ukuran partikel yang lebih kecil yaitu 59.5 nm dibanding dengan Au-2 sebesar 78,5 nm dengan distribusi partikel yang merata berdasarkan nilai polydispersity index yang didapatkan. Pola TEM nanoprartikel emas yang dihasilkan berbentuk spherical. Ekstrak kulit buah Brucea javanica sebagai medium sintesis nanopartikel emas merupakan sebuah hal terbarukan dalam proses biosintesis nanopartikel emas. Nanopartikel berpotensi dimanfaatkan dalam dunia farmasi sebagai penghantar obat dan antibakteri.
Co-Authors Afif, Muhammad adli Andari, Diana Annisa Ramadhani Asral, Suci Sukma Taruna Daefisal, Octakireina Liesaini Eka Angasa Falahudin, Aswin Kazi, Mohsin Khafit Wiradimafan Mardlia, Zulfikri Achid Morina Adfa Nesbah, Nesbah S, Sal Prima Yudha SALPRIMA YUDHA S Swadexi Istiqphara, Swadexi Wibowo, Risky Hadi