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All Journal VALENSI Jurnal Ilmu dan Inovasi Fisika
Firdaus, Muhammad Lutfi
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Chemistry Computer Science & IT Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology

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Box-Behnken Experimental Design for Electrochemical Aptasensor Optimization on Screen Printed Carbon Electrode/Silica-Ceria Zakiyyah, Salma Nur; Eddy, Diana Rakhmawaty; Firdaus, Muhammad Lutfi; Subroto, Toto; Hartati, Yeni Wahyuni
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 1, May 2023
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v9i1.27493

Abstract

This study aims to optimize the epithelial sodium channel (ENaC) electrochemical aptasensor with the Box-Behnken experimental design. ENaC is a protein that plays a role in sodium ion transport in several epithelial tissues and is associated with hypertension. The ENaC protein aptamer is held in place in the electrochemical aptasensor by a modified screen-printed carbon electrode (SPCE) of silica-ceria composite (SiO2-CeO2). The unique structure of a silica matrix with high biocompatibility can form composites through a hydrothermal process. The Box-Behnken (BBD) experimental design is an efficient optimization method of factors that affect the experiment at three levels. The FTIR results of the silica-ceria composites were 549.35 cm-1 (Ce-O), 1095.3 cm-1 (Si-O-Si), and 491.28 cm-1 (Si-O). Meanwhile, SPCE/silica-ceria characterized by differential pulse voltammetry (DPV) showed an increase in peak current [Fe(CN)6]3-/4- from 3.190 μA to 9.073 μA. Three experimental factors, aptamer concentration, streptavidin incubation time, and aptamer incubation time, were optimized with BBD and obtained at 0.5 μg.mL-1, 30 minutes, and 1 hour. The optimum conditions observed resulted in a selective current response for ENaC protein detection. The optimization results can be applied to aptamer-based ENaC protein detection in samples.
Systematic Literature Review: Utilization of Agricultural Waste as Raw Material for Renewable Energy Biobriquettes Ilahiyah, Fitratul; Ruyani, Aceng; Firdaus, Muhammad Lutfi
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 10, No 2 (2026)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v10i2.68470

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The global energy crisis and environmental degradation caused by fossil fuel consumption have driven the search for sustainable alternative energy sources. Agricultural waste, which is abundant and often underutilized, has significant potential as raw material for biobriquettes in renewable energy production. This Systematic Literature Review (SLR) aims to comprehensively analyze research related to the utilization of agricultural waste as biobriquette feedstock during the period 2012-2025. The PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) method was used to screen 200 articles from Web of Science, Scopus, and Google Scholar databases, with 40 articles meeting the inclusion criteria. The review results show that agricultural wastes such as rice husks, corn cobs, bagasse, and coconut shells have competitive calorific values (3.000-7.000 cal/g) meeting solid fuel standards. Factors affecting biobriquette quality include raw material type, binder type (tapioca, molasses, clay), compaction pressure (100-1,000 kg/cm²), and particle size. Indonesia, with agricultural waste production reaching 136 million tons per year, has biomass energy potential of 49.810 MW. Biobriquette development not only offers effective waste management solutions but also contributes to greenhouse gas emission reductions of up to 335.679 tons CO₂-eq per 100,000 tons of biobriquettes. This SLR identifies research gaps and provides recommendations for developing more efficient and sustainable biobriquette technology.
Co-Authors ACENG RUYANI Diana Rakhmawaty Eddy Ilahi, Fitratul Toto Subroto Yeni Wahyuni Hartati Zakiyyah, Salma Nur