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INDONESIA
Science and Technology Indonesia
Published by Universitas Sriwijaya
ISSN : 25804405     EISSN : 25804391     DOI : -
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Environmental Science Materials Science & Nanotechnology Physics
An international Peer-review journal in the field of science and technology published by The Indonesian Science and Technology Society. Science and Technology Indonesia is a member of Crossref with DOI prefix number: 10.26554/sti. Science and Technology Indonesia publishes quarterly (January, April, July, October). Science and Technology Indonesia is an international scholarly journal on the field of science and technology aimed to publish a high-quality scientific paper including original research papers, reviews, short communication, and technical notes. This journal welcomes the submission of articles that covers a typical subject of natural science and technology such as: > Chemistry > Biology > Physics > Marine Science > Pharmacy > Chemical Engineering > Environmental Science and Engineering > Computational Engineering > Biotechnology Journal Commencement: October 2016
Arjuna Subject : -
Articles 551 Documents
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Optimization of Radiation and Electric Current Storage in a Dye-Sensitized Solar-Cell System Based FTO/TiO2 /Acy/PVDF/C/FTO Modules for Electrical Equipment Applications Kurniawan, Muhammad Ridho Hafid; Cahyani, Sinta Anjas; Kusumawati, Nita; Setiarso, Pirim; Muslim, Supari
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
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.2025.10.2.574-587

Abstract

Indonesia has an electrification rate exceeding 99% as of 2020, yet it faces increasing electricity demands amid declining fossil fuel availability. Solar energy, particularly through DSSC, presents a promising renewable alternative, benefiting from an abundant radiation potential of up to 120.000 TW. DSSC have garnered significant attention due to their thin design, high efficiency, ease of fabrication, and environmental friendliness. The DSSC module was designed using two FTO glass plates as electrodes, with an anode surface area of 3 cm2. The TiO2 photoanode was prepared using a casting knife technique and then sintered at 450°C for one hour. This was followed by sensitization with anthocyanin dye derived from the butterfly pea flower under acidic conditions for 24 hours to ensure the stability of the compound. The electrolyte system consisted of PVDF NF membranes soaked in the electrolyte    solution for one hour to prevent leakage, thus completing the FTO/TiO2/PVDF/C/FTO system. Performance optimization involved arranging 20 DSSC cells in a mixed series-parallel circuit configuration. Electrical parameters were measured using a multimeter under various lamp irradiation durations. The optimal efficiency was achieved with 5 hours of irradiation, resulting in 2.050 mV and 23.5 x 10-3 µA. When integrated into a battery system, the DSSC module demonstrated effective current storage stability over 6 hours, indicating strong potential for practical implementation in sustainable energy generation for real-world applications. 
Stability and Antiaging Effectiveness Studies of Astaxanthin-Loaded Nanostructured Lipid Carriers Using a Combination of Cetyl Palmitate and Soybean Oil Zhihrotulwida, Dzakiya; Soeratri, Widji; Erawati, Tristiana; Rosita, Noorma
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
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.2025.10.2.473-481

Abstract

Astaxanthin is a potent antioxidant belonging to carotenoid compounds that is mainly produced from green microalgae Haematococcus pluvialis. Astaxanthin is beneficial for skin health as antiaging agent, but has limitations in its delivery through the skin. Astaxanthin could be formulated in nanostructured lipid carriers to improve its efficacy. The purpose of this study was to evaluate the stability and antiaging effectiveness of astaxanthin-loaded nanostructured lipid carriers (ASX-NLCs) with cetyl palmitate and soybean oil as lipid combinations at several ratios of 100:0, 90:10, 80:20, and 70:30. ASX-NLCs were synthesized using a high-shear homogenization technique. ASX-NLCs were characterized and stability evaluated after storage for 90 days. The antiaging effectiveness of ASX-NLCs was evaluated by in vitro release test using dialysis bag for 8 hours, as well as collagen density and fibroblast count evaluation on UV-induced skin aging mice for 28 days. After storage, all ASX-NLCs did not change significantly in organoleptic, pH, and particle size. However, other parameters including polydispersity index, viscosity, and entrapment efficiency experienced significant changes in some formulas. The release test showed that F4 (70:30) gave the highest cumulative release and was significantly different from F1 (100:0). The collagen density of the groups treated with ASX-NLC F3 (80:20) and F4 (70:30) increased significantly compared to the UVB control group, while the fibroblast count did not differ significantly in all groups. Overall, ASX-NLCs containing cetyl palmitate and soybean oil at ratios of 80:20 and 70:30 could improve the antiaging effect of astaxanthin which might be influenced by its better stability and release.
Synergistic Effects of Double Oxidation on the Extraction and Characterization of Crystalline Nanocellulose from Rattan Waste and Kenaf Fiber Samat, Noorasikin; Roshidi, Muhamad Aliff Redhwan Mohamad; Onn, Dona Nur Afiqah Don Ramlan; Hatta, Maziati Akmal Mohd; Sabaruddin, Fatimah A'thiyah
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
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.2025.10.2.411-419

Abstract

This study investigates the potential of rattan fiber, a by-product of the furniture industry, as a feedstock for nanocellulose production. Cellulose nanocrystals (CNC) were extracted using a double oxidation process that combined bleaching with ammonium persulfate (APS) treatment. The effects of APS reaction time, pre-treatment with and without bleaching, on the crystallinity and morphology of CNC were evaluated. Additionally, the feasibility of applying this extraction method to agro-industrial kenaf fiber was assessed. Fourier transform infrared (FTIR) spectroscopic confirmed the removal of lignin and hemicellulose, while the X-ray diffraction (XRD) analysis showed a gradual increase in the crystallinity index (Crl) of CNCs extracted from rattan and kenaf, achieving 73.40% and 72.40, respectively. Scanning Electron Microscope (SEM) revealed fiber disintegration and Transmission Electron Microscopy (TEM) confirmed the spherical CNCs of rattan and kenaf having a diameter of 61.51 ± 6.46 nm and 31.76 ± 6.34 nm, respectively. Atomic force microscopy (AFM) further indicated smaller CNC sizes in kenaf compared to rattan. These findings suggest that rattan fiber is a promising renewable feedstock for producing nanocellulose, with potential application in various industries.
Synthesis and Antibacterial Properties of Fluorapatite and FAp-ZnO-Chitosan Composite as Dental Implant Materials Charlena; Khofiyatuzziyadah, Alif Aryan; Akhiruddin; Purwantiningsih
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
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.2025.10.2.562-573

Abstract

Regenerative biomaterials research has continued to grow in recent decades, one of which is dental implants. The material that can be used is fluorapatite (FAp), as it is a significant element of human bones and teeth. FAp has better chemical and thermal stability than other apatite materials. However, FAp has low antibacterial properties, so it needs to be composited with other antibacterial materials, such as zinc oxide (ZnO) and chitosan. In addition, chitosan was also added to stabilize FAp and ZnO an effort to increase antibacterial and in vitro bioactivity in apatite formation. Therefore, this research intends to synthesize and assess the antibacterial properties and in vitro bioactivity of FAp-ZnO chitosan to increase its potential as a dental implant manufacturing material. FAp and ZnO were synthesized and then composited with chitosan into FAp-ZnO-chitosan by a simple mixing method. The FAp-ZnO-chitosan composite was successfully synthesized by looking at X-ray diffraction (XRD), Fourier Transform Infra-Red (FTIR), and Scanning Electron Microscope-Energy Dispersive X-ray (SEM EDX) characterization results. The in vitro bioactivity of the composite showed new surface growth during immersion with simulated body fluid (SBF) solution, indicating potential attachment of the implant material to the tissue. The antibacterial properties of FAp-ZnO-chitosan also showed an increased zone of inhibition compared to the single material. This indicates that the FAp-ZnO-chitosan composite material has the potential to be used as a dental implant material.
Nanoparticle-Enhanced 3D-Connector Microfluidic Paper-Based Analytical Device (3D-µPADs) for Sensitive and Cost-Effective Detection of Albumin-Creatinine Ratio in Urine Sample Sabarudin, Akhmad; Fiddaroini, Saidun; Fahmi, Ahmad Luthfi; Roja’i, Abdul Munir; Salsabila, Isadora Evani; Aulanni’am; Srihardyastutie, Arie; Susanti, Hani; Samsu, Nur
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
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.2025.10.2.504-518

Abstract

Chronic kidney disease (CKD) is a global health challenge affecting over 800 million people worldwide. Early detection is crucial to prevent progression to end-stage renal disease (ESRD), where life-saving interventions like dialysis or transplantation are necessary. Among the markers for early kidney damage, the Albumin Creatinine Ratio (ACR) in urine is one of the most reliable. Conventional methods of ACR detection, such as LC/MS-MS and ELISA, are highly accurate but require expensive equipment and skilled personnel, limiting their accessibility, especially in resource-limited settings. To address this, we developed a 3D-connector microfluidic paperbased analytical device (3D-µPADs) enhanced with gold nanoparticles (AuNPs) for sensitive and low-cost ACR detection. The integration of AuNPs amplifies colorimetric signals, enhancing the visual distinction in albumin detection. Our 3D-µPADs werefabricated using chromatographic paper Whatman No. 1 with hydrophobic barriers created by solid wax printing, followed by reagent immobilization for albumin and creatinine detection. The colorimetric and distance responses, based on reactions with Bromocresol Green (BCG) and Chrome Azurol S-Palladium (CAS-Pd2+), were analyzed using ImageJ software to quantify albumin and creatinine levels. The 3D-µPADs exhibited optimal sensitivity and accuracy, with linear detection ranges for albumin and creatinine of 30–400 mg/g. Validation with human urine samples demonstrated an accuracy of 93.04%, suggesting that 3D-µPADs offer a promising alternative for early nephropathy detection. Our findings provide a cost-effective, accessible tool for CKD screening, potentially transforming diagnostics in low-resource environments.
The Potential of Ethanol Extract of Pasak Bumi Roots (Eurycoma longifolia Jack) as an Anti-Prostate Cancer In Vitro Against PC-3 Cells Kania, Nia; Rahman, Eka Yudha; Priyandoko, Didik; Sabrina, Adilah Hafizha Nur; Widowati, Wahyu; Azis, Rizal; Annaba, Aziz; Hadiprasetyo, Dhanar Septyawan; Alexandro, Garry
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
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.2025.10.2.452-466

Abstract

The prevalence of prostate cancer cases in men is expected to continue increase. In 2040, it is estimated that there will be 2.293.818 new cases and a 1.05% increase in the death rate due to prostate cancer. Eurycoma longifolia Jack roots extract (ELE) has potential as an alternative treatment. This study aims to analyze ELE potential as an anti-prostate cancer agent through in silico assay and in vitro assays on the prostate cancer cell line (PC-3). ELE compounds were docked against Casp-3, Casp-8, HAX-1, p27, and PTEN. In vitro assays on PC-3 cells were used, namely cell viability (WST-8), ROS levels; cell cycle; and cell apoptosis (flow cytometry), PC-3 cell senescence (μ-Galactosidase staining), Casp-3; Casp-8; HAX-1; p27; and PTEN gene expression (qRT-PCR). All proteins target were successfully docked with ELE compounds and presented binding interactions. ELE is known to reduce viability, intracellular ROS levels, live cells, necrosis, and reduce HAX-1 gene expression, and inhibit the cell cycle G0/G1 phase. ELE can also increase inhibition, senescence, late and early apoptosis, and Casp-3, Casp-8, p27, and PTEN gene expression. ELE 100 μg/mL is the most effective concentration. ELE has potential as an anti-prostate cancer agent through apoptosis, cell cycle, and antioxidant pathways
Antidiabetic Activity of Endophytic Fungi Extract from Leaves of Kembang bulan (Tithonia diversifolia (Hemsley) A. Gray) Through α-Amylase Enzyme Inhibition Putri, Hanindita Alifia; Elisa Nurnawati; Widjajanti, Hary
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
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.2025.10.2.350-359

Abstract

Diabetes mellitus is a serious health problem with an increasing number of sufferers. In this context, an important method for controlling blood sugar levels is the derivation of α-amylase enzyme inhibitors from natural materials such as endophytic fungi. Therefore, this research aimed to analyze the potential of endophytic fungi from Tithonia diversifolia leaves as α-amylase enzyme inhibitors, secondary metabolites, as well as the character and identity of potential endophytic fungi. The stages included isolation and identification of endophytic fungi, extraction of secondary metabolites, α-amylase inhibition tests, analysis of bioactive compounds using Thin Layer Chromatography (TLC), and identification of potential endophytic fungi. The results showed that DT3J1 (67.83 µg/mL), DM3J1 (69.36 µg/mL), DT2J2 (80.42 µg/mL), and DT4J1 (88.64 µg/mL) of the eight endophytic fungi isolates reported high potential as inhibitors of the α-amylase enzyme, with IC50 values ​classified as strong. Potential fungal extracts contain bioactive compounds such as alkaloids, flavonoids, phenols, and terpenoids. Meanwhile, molecular identification showed that potential endophytic fungi consisted of Curvularia pseudointermedia, Diaporthe passifloricola, Nodulisporium verrucosum, and Muyocopron laterale species. This research also provided scientific evidence on the potential of the endophytic fungus Tithonia diversifolia as a candidate for antidiabetic drugs.
Ticagrelor Solubility and Dissolution Rate Enhancement Using Mesoporous Silica SBA-15 Hasanah, Uswatul; Rizky, Fattihatul; Mohd Amin, Mohd Cairul Iqbal; Zaini, Erizal
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
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.2025.10.2.598-604

Abstract

Ticagrelor is a triazolopyrimidine antiplatelet agent with poor water solubility. Ticagrelor was incorporated into mesoporous silica SBA15 in this study to evaluate its physical stability and improve its solubility and dissolution rate. TEOS was employed as a silica precursor and Pluronic P123 as a template to synthesize SBA-15. Ticagrelor was loaded into SBA-15 at a mass ratio of 1:1. Physicochemical characterization was conducted using nitrogen adsorption-desorption isotherm analysis, powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), fourier-transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). Ticagrelor solubility and dissolution were tested using distilled water as the medium. To evaluate the physical stability, Ticagrelor-SBA-15 was stored in a climatic chamber at 75% RH and 40°C for a month and analyzed using PXRD. Physicochemical characterization indicated efficient adsorption of ticagrelor into the SBA-15 pores, resulting in an amorphous form of solid material. Meanwhile, solubility and dissolution rate testing showed respective increases of 1.33 times and 1.74 times with significant differences (p<0.05) while maintaining its physical stability after storage for one month. Based on this study, it can be concluded that the incorporation of  mesoporous SBA-15 significantly enhances ticagrelor’s solubility and dissolution rate while maintaining stability.
Decolorization of Synthetic Dyes by Laccase of Phellinus noxius BRB 11 Immobilized with Halloysite Nanotubes Naser, Inda Hastuti N; Kemala, Tetty; Yanto, Dede Heri Yuli; Purwaningsih, Henny; Nurhayat, Oktan Dwi; Ardiati, Fenny Clara; Bakar, N.H.H Abu; Iqbal, Anwar
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
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.2025.10.2.644-659

Abstract

Halloysite nanotubes (HNTs) have been proposed as promising supports for enzyme immobilization. Developing an effective technique for enzyme immobilization on HNTs is crucial for their practical application. In this study, we present a method for immobilizing laccase enzymes on HNTs using various amino acids as green cross-linkers for eco-friendly decolorization of synthetic dye. The modified HNTs were characterized using FT-IR, FE-SEM, and HR-TEM analyses. Furthermore, the effects of various parameters—including pH (ranging from 3 to 8), temperature (30-70°C), toxicity, and reusability—on the activity of both free and immobilized laccase were investigated. The results indicated that glycine (Gly) provided the most effective support for laccase immobilization on HNTs. The modified HNTs/Gly-Lac achieved an immobilization yield of 98.45% and successfully decolorized 94.60% of Acid Blue 129 (AB129) within 2 h. The successful immobilization of laccase onto functionalized HNTs was confirmed through FT-IR, FE-SEM, and HR-TEM analyses. Morphological observations of HNTs/Gly for laccase immobilization showed a thickened and roughened appearance with a thin, light gray layer on the outer surface. Additionally, the presence of an imine (-C=N-) bond peak and a peak at 1410 cm-1, corresponding to the (-NH) bond, suggested successful covalent immobilization. The toxicity analysis revealed a reduction in the toxicity of laccase after immobilization onto modified HNTs. A reusability assessment conducted over five cycles demonstrated that decolorization efficiency remained above 45%. These findings suggest that HNTs/GlyLac could serve as an effective material for textile dye wastewater treatment.
Adsorptions of Sodium Ion/Atom on Graphene Quantum Dots for Battery Applications: A DFT Study Mulya, Fadjar; Nugroho, Muhammad Adi; Kuamit, Thanawit; Setyawan, Dwi
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
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.2025.10.2.614-621

Abstract

Sodium-ion batteries (SIBs) are emerging as a cost-effective and sustainable alternative to lithium-ion batteries, yet they face challenges such as lower energy density and electrode material instability. This study explores the potential of coronene and circumcoronene-based graphene quantum dots (GQDs) as anode materials for SIBs, focusing on three adsorption areas: central, intermediate, and edge, under two battery conditions: charging and discharging. By addressing these limitations through advanced nanostructuring, we employeddensityfunctional theory (DFT) withtheM06-2X/6-31G+(d)leveloftheorytoconductcomprehensive analyses of sodium adsorption on GQDs. Our findings reveal that both coronene and circumcoronene GQDs preferentially adsorb sodium at the edge areas due to the highest energy adsorption. In discharging conditions, coronene exhibited an adsorption energy of-1.09 kcal/mol, while circumcoronene showed-9.84 kcal/mol. In charging conditions, the adsorption energies were-33.44 kcal/mol for coronene and-37.19 kcal/mol for circumcoronene. Additionally, the energy gap of GQDs was significantly reduced after sodium adsorption, from 5.84 eV to 1.38 eV for coronene and from 4.33 eV to 1.63 eV for circumcoronene. Both GQDs showed theoretical voltages in the range of 1.40 to 1.47 V for coronene and 1.19 to 1.22 V for circumcoronene, respectively. Conclusively, our study recommends circumcoronene as large-sized GQDs as optimal SIB anode materials, offering higher adsorption energy, good conductivity, and reasonable electrochemical performance. This research addresses a theoretical gap by illuminating the impact of Na adsorption on GQDmolecular and electronic structures, aiding in the design of enhanced capacity nano-anodes for SIBs.

Page 46 of 56 | Total Record : 551

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