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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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Pectin Red Dragon Fruit Peel Pectin-Based Microspheres for Oral Quercetin Delivery: Characterization, Stability Study, Digestion Resistance, and Cytotoxicity Against HeLa Cells Kurniawan, Muhammad Fariez; Setyawan, Dwi; Hariyadi, Dewi Melani
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.2025.10.4.1049-1073

Abstract

This study aims to evaluate the potential of red dragon fruit skin pectin to be used as a polymer compared with commercial pectin in the quercetin microsphere. Microspheres were made using the ionic gelation technique. Ten formulas were created, utilizing pectin from red dragon skin extracted with oxalic acid (OA75), citric acid (CA75), acetic acid (AA75), and commercial pectin at 1% and 1.5% concentrations. A gel permeation chromatography test (GPC) was performed to evaluate pectin’s molecule weight. Parameters were assessed, including yield, moisture content (MC), Carr’s Index, Hausner ratio, swelling index, Fourier Transform Infrared Spectroscopy (FTIR), particle size, polydispersity index (PDI), drug loading (DL), encapsulation efficiency (EE), Scanning Electron Microscope (SEM), in vitro drug release, accelerated stability test at a temperature of 40±2oC and RH 75±5% for 3 months and thermal stability test in the form of DSC and XRD at the same temperature and humidity for 9 months, digestion resistance with incubation in artificial stomach and intestinal solution for 4 hours continued with cytotoxicity test on HeLa cells with MTT Assays. Results of FTIR indicate a strong interaction between quercetin and pectin in forming a stable microsphere structure; SEM showed the spheres morphologically. The kinetics of quercetin release from microspheres was the Korsmeyer-Peppas model. DL and EE had no significant differences for 3 months and no significant changes in the glass transition in the DSC test during testing until month 9. The FF formulation (1.5% AA75) had the highest cytotoxic activity against HeLa cells and a high Selectivity Index.
Potential of Secretome Hydrogel for Wound Healing in LPS- and Scratch-Induced BJ Cells as an Inflammation Model Widowati, Wahyu; Rahmat, Deni; Faried, Ahmad; Nainggolan, Ita Margaretha; Priyandoko, Didik; Wargasetia, Teresa Liliana; Sugiaman, Vinna Kurniawati; Triharsiwi, Dwi Nur; Qlintang, Sandy; Murti, Harry; Azis, Rizal; Jeffrey, Jeffrey
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.2025.10.4.1242-1254

Abstract

Wound healing often requires specialized interventions to accelerate recovery due to prolonged inflammation and limited regenerative factors. Umbilical Cord Mesenchymal Stem Cells secretome (UCMSCs) comprises various cytokines and growth factors that can promote wound healing. This study aims to analyze the potential of a secretome-based hydrogel as a wound-healing agent using BJ fibroblast cells induced by lipopolysaccharide (LPS) and scratch injury as an inflammation model. The secretome hydrogel was formulated using Carbopol, Hydroxypropyl Methylcellulose (HPMC), Hydroxyethyl Cellulose (HEC), and secretome. Cytotoxicity was conducted using the WST-8 assay, while cell migration was evaluated through a scratch assay. Tumor Necrosis Factor-???? (TNF-????), Nuclear Factor kappa-B (NF-????B), and Interleukin-8 (IL-8) gene expression were analyzed via qRT-PCR. Additionally, malondialdehyde (MDA) levels were measured for oxidative stress assessment, whereas Connective Tissue Growth Factor (CTGF) and Transforming Growth Factor-????1 (TGF-????1) levels were quantified using ELISA and colorimetric assays. The secretome hydrogel exhibited no cytotoxic effects on BJ fibroblast cells and significantly enhanced cell migration. Moreover, it reduced the TNF-????, IL-8, and NF-????B expression, indicating anti-inflammatory activity. The hydrogel also decreased MDA levels while increasing TGF-β1 and CTGF expression, suggesting antioxidant properties and enhanced tissue regeneration in the inflammatory model. The secretome-based hydrogel presents a promising therapeutic approach for promoting chronic wound healing by modulating inflammation, reducing oxidative stress, enhancing tissue regeneration, and stimulating fibroblast migration.
Anti-tyrosinase Activity of 3’,4’,5’-Trimethoxychalcones: Experimental and Computational Studies Danova, Ade; Hermawati, Elvira; Chavasiri, Warinthorn; Mujahidin, Didin; Musthapa, Iqbal; Kurniadewi, Fera
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.2025.10.4.982-989

Abstract

Tyrosinase inhibitors are utilized as preservatives in the food industry and skin-lightening agents in the medical and cosmetic sectors. However, there has been little progress in clinical trials owing to challenges such as low bioavailability, significant skin irritation, and instability. Hence, the objective of this study was to evaluate the inhibitory activity of 3’,4’,5’-trimethoxychalcones through in vitro, molecular docking and molecular dynamics studies targeting tyrosinase. Five 3’,4’,5’-trimethoxychalcones (1-5) were evaluated their biological activity against tyrosinase for the first time. Compounds 4 and 5 were excellent inhibitory activity against tyrosinase with IC50 values of 1.9 and 1.7 μm compared with kojic acid and ascorbic acid. Isovanillin and catechol moieties are vital in this present study. This result was supported with molecular docking by shaping interaction in the catalytic site with histidine residues and the stability evaluation of the inhibitor-protein complexes using molecular dynamics simulation. The lipinski’s rules showed a fit with two potential inhibitors (4, 5). Therefore, 3’,4’,5’-trimethoxychalcones possessing isovanillin and catechol parts in the B ring are promising candidate for further study as tyrosinase inhibitors by evaluating their efficacy in vitro and in vivo.
Intramolecular Oxa-Michael Cyclization of 2’-Hydroxychalcones for the Synthesis of Flavanones: A Comparative Study Ramadhini, Rizky Annisa; Danova, Ade; Roswanda, Robby
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.2025.10.4.1169-1178

Abstract

In this study, flavanones were synthesized using a two-step reaction process starting from 2’ hydroxyacetophenone and aldehydes. Claisen-Schmidt condensations were carried out on the starting materials to produce 2’-hydroxychalcones with mono-, di-, and tri-substituents on ring B. Subsequently, flavanones were produced via intramolecular oxa-Michael cyclization under three different reaction conditions: methanesulfonic acid in ethanol, sodium acetate in methanol, and piperidine in water. These approaches aimed to investigate the steric and electronic effects to achieve high yields in optimal reaction conditions for flavanone synthesis. Twelve 2’-hydroxychalcones (1a-1l) were successfully synthesized with yields ranging from 17% to 99%. The use of methanesulfonic acid in ethanol resulted in modest flavanone yields (11% for 2a, 13% for 2c). The synthesis of flavanones using sodium acetate was successful for seven 2’-hydroxychalcones (2a-2g), yielding products with varying yields (2-49%). Furthermore, piperidine was effective for three 2’-hydroxychalcones (1a, 1b, 1e), resulting in high flavanone yields (74-93%). These findings indicate that the three reaction conditions are only effective for certain 2’-hydroxychalcones.
Cu Film Characteristics Synthesized Using Electrodeposition Technique at Various Currents and Under a Rotating Neodymium Magnet Susetyo, Ferry Budhi; Basori; Mansor, Muhd Ridzuan; Ruliyanta; Yudanto, Sigit Dwi; Rosyidan, Cahaya; Situmorang, Evi Ulina Margareta; Edbert, Daniel; Mutiara, Etty; Yulianto, Tri; Agus Jamaludin; Nanto, Dwi
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.2025.10.4.1156-1168

Abstract

In the present study, Cu films were made over Al alloy using the electrodeposition technique. Electrodeposition conducted at various currents (80, 100, and 120 mA), with and without influence by a rotating magnetic field (100 rpm of rotation). 0.5 M CuSO4 + 20 mL of H2SO4 was used for electrolyte solutions. The sample before and after electrodeposition was weighed using digital scale to calculate deposition rate and current efficiency. All formed Cu films were characterized using X-ray diffraction (XRD), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), Scanning electron microscopy equipped with Energy dispersive spectroscopy (SEM-EDS), and Potentiostat apparatus. Furthermore, antibacterial activity using Staphylococcus aureus was also investigated. Increasing the current of electrodeposition leads to an increase in deposition rate and current efficiency for both conditions (with and without rotating magnetic field influence). Based on the XRD and ATR-FTIR investigation, Cu was successfully deposited onto Al surface. Currents used for the electrodeposition process between 80-100 mA would result in a faceted structure, while using 120 mA results near to spheroidal. Shifting to higher currents leads to decreases in grain sizes and presenting a rotating magnetic field also enhances the grain size. Current and rotating magnetic influences are not linearly influencing corrosion potential, corrosion rate and antibacterial activity. The sample made using higher current plus influencing with a rotating magnetic field has less corrosion rate and higher area of inhibition at around 0.808 mmpy and 4.01 cm2.
Precision Engineered Graphene Oxide Membranes Optimizing Thin Film Composite Layers for Solvent and Dye Separation Widakdo, Januar; Fadly Azril Priodani; Hannah Faye M. Austria; Tsung Han-Huang; Aditya Rianjanu; Canggih Setya Budi; Anawati Anawati; Wei-Song Hung
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.2025.10.4.1031-1048

Abstract

Organic solvent nanofiltration (OSN) is a promising separation technology with low energy consumption and environmental benefits. However, membrane stability in harsh organic solvents remains a challenge. Graphene oxide (GO) is widely explored due to its exceptional mechanical strength and selective permeability; however, further modifications are necessary to optimize its performance. This study investigates the enhancement of GO membranes by incorporating a thin-film composite (TFC) layer through interfacial polymerization using polyethyleneimine (PEI) and trimethyl chloride (TMC). The fabricated membranes were characterized for theirmorphology, chemical structure, and filtration performance using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), and contact angle measurements. Filtration tests were conducted with ethanol and Congo red dye solutions. The optimized membrane, composed of 0.1 wt% PEI 800 Mw and 0.05 wt% TMC, exhibited superior performance, demonstrating a permeance of 8.06 ± 2.31 L L m-2 h-1 bar-1 and a rejection rate of 95.20 ± 1.54% for Congo red dye. Additionally, the membrane exhibited a charge-dependent separation mechanism, achieving a 98.64 ± 0.38% rejection of methyl green due to both affinity and Donnan effects. These findings provide insights into developing advanced OSN membranes for efficient solvent purification and dye separation.
Temperature-Driven Optimization of LiCoO2 Thin-Film Cathodes via Pulsed Laser Deposition: Structural and Morphological Control Ayu, Nur Ika Puji; Rivai, Abu Khalid; Evvy, Kartini
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.2025.10.4.1215-1224

Abstract

Thin LiCoO2 film cathodes were fabricated on silicon substrate by Pulsed Laser Deposition (PLD). The microstructural properties were investigated as a function of the substrate temperature (Ts), which varied between 750◦C, 850 ◦C and 900 ◦C. The deposition was performed using Nd:YAG laser (266 nm, 100 mJ) under an oxygen partial pressure of 200 mTorr. X-ray Diffraction (XRD) analysis revealed that films consist of HT-LiCoO2 and a small amount of Co3O4 precipitates. The highest crystallinity was obtained for the thin film deposited at Ts = 900 ◦C, whereas the Atomic Force Microscopy (AFM) indicated uniform grain size distributions of the film deposited at Ts = 850 ◦C with an approximate surface roughness of 18 nm. The increase of surface roughness at higher Ts was attributed to non-uniform grain distribution, highlighting the importance of substrate temperature control in minimizing interfacial defects for improved electrochemical performance. This study provides key insights into the interplay between PLD parameters and film microstructure, offering a pathway for optimizing LiCoO2 cathodes for thin-film batteries and advanced solid-state energy storage devices.
Microwave-Assisted Synthesis: A Green Chemistry Approach for Drug Cocrystals Synthesis Puspita, Oktavia Eka; Sulistyowaty, Melanny Ika; Salam, Rudy; Setyawan, Dwi
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.2025.10.4.1130-1147

Abstract

Microwave-assisted synthesis (MAS) presents a promising approach to the formation of pharmaceutical cocrystals, offering notable improvements in solubility, dissolution rate, stability, and bioavailability of active pharmaceutical ingredients (APIs). This review aims to evaluate the potential of MAS as a green and efficient strategy for drug cocrystal synthesis, particularly in comparison to conventional methods such as solvent evaporation, slurry crystallisation, and grinding techniques. A systematic literature review was conducted following PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines, to ensure a comprehensive selection of relevant studies. The analysis focused on reported synthesis methods, cocrystal formation under microwave exposure, reaction conditions, yields, purity, and scalability outcomes of MAS compared to conventional techniques. This review also highlight current applications, critical synthesis parameters, and challenges such as penetration depth, reaction uniformity, and thermal control. Findings indicate that MAS significantly reduces reaction time, minimizes solvent use, and enhances product purity and yield. Its compatibility with solvent-free or minimal-solvent processes aligns closely with green chemistry principles, making it a sustainable alternative. Furthermore, MAS effectively addresses solubility mismatches and process inefficiencies commonly encountered in traditional methods. The future prospect of MAS lies in its integration with continuous manufacturing, automation, and drug repurposing efforts, which could revolutionize pharmaceutical formulation by accelerating innovation while adhering to environmental and regulatory standards.
Enhancing In Vitro Dissolution of Ferulic Acid Through Co-Crystal Formation Using Malonic Acid and Nicotinamide Co-formers Setyawan, Dwi; Soraya, Yasmin; Ekowati, Juni; Winantari, Agnes Nuniek; Rani, Karina Citra; Kanzaffa, Firly Afnauriza Tedja; Pujiono, Ferry Eko
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.2025.10.4.1255-1269

Abstract

Ferulic acid is categorized as a Biopharmaceutical Classification System (BCS) class II drug, which exhibits low solubility in water (0.91 mg/mL). The formation of a co-crystal using malonic acid and nicotinamide as co-formers by the microwave irradiation method is an approach to enhance its solubility and dissolution. This study aims to evaluate the effect of co-crystal formation using these two co-formers at a 1:1 molar ratio on the solubility and dissolution of ferulic acid. The result emphasizes the formation of new peaks and peak shifting compared to the pure materials characterized from the Fourier Transform Infrared (FT-IR) spectrum. Moreover, the Differential Scanning Calorimetry (DSC) thermogram exhibits the differences in the co-crystal melting point compared to the pure drug and co-former, indicating the alteration of molecular structure on the crystal lattice of ferulic acid caused by the strong interaction between supramolecular homomer and heteromeric synthon. The formation of a new crystalline phase is also observed from the X-ray Diffraction (XRD) diffractogram, suggesting the formation of a different phase from its co-crystal component. The morphology characterization using Scanning Electron Microscope (SEM) revealed that the ferulic acid crystal habit changes into different forms, which is acclaimed as a co-crystal formation. The results of this study also disclosed that the co-crystal formation of ferulic acid significantly enhances ferulic acid solubility and dissolution characteristics compared to the pure drug and physical mixture (p < 0.05). The enhancement of solubility is 11.85% and 10.39% for ferulic acid–malonic acid and ferulic acid–nicotinamide co-crystal, respectively. Moreover, the dissolution rate of ferulic acid increases 3.50-fold and 3.61-fold from the formation of those co-crystals. Therefore, the formation of ferulic acid–malonic acid as well as ferulic acid–nicotinamide co-crystals in a 1:1 molar ratio by the microwave irradiation method is effective in improving ferulic acid solubility and dissolution.
Analysis of Hydrolyzed Collagen in Facial Serum for Halal Authentication Using FTIR Spectroscopy and Multivariate Calibration Salamah, Nina; Firdaus, Rizqi Amalia; Guntarti, Any; Ahda, Mustofa; Uddin, Abm Helal; Kurniawan, Muhammad Fariez
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.2025.10.4.1270-1279

Abstract

Cosmetic trends in Indonesia are on the rise, particularly for facial serum products. However, most of these products lack halal certification, posing an important concern for Muslim consumers due to the potential use of haram substances, such as pork gelatin. This study seeks to identify the source of gelatin in serum products using the Fourier Transform Infrared (FTIR) spectroscopy and chemometric analysis. The samples used in this study include a reference facial serum formulated with pure bovine and porcine gelatin concentrations in the ratios of 1:0, 8:2, 5:5, 2:8, and 0:1, three hydrolyzed collagen serums that are not yet labeled halal and available on Shopee, and one serum that is labeled halal. The method used was FTIR combined with PLS chemometrics and PCA. The isolation of facial serum gelatin was performed using acetone at -20oC, followed by analysis via FTIR at wave numbers ranging from 4000 to 400 cm-1. FTIR results indicated the presence of functional groups in gelatin constituents, including C O, N H, C N, and C H aliphatic. The wavelengths employed for PLS and PCA analysis ranged from 1631 to 1430 cm-1. Calibration results showed R2=0.9936 and RMSEC=3.0445%. Internal validation yielded RMSECV=0.1674% and R2=0.9994 whilst external validation yielded RMSEP=0.9981% and R2=0.9910. Lastly, PCA analysis revealed that one halal-labeled serum sample contained bovine gelatin, whereas the three examined commercial serums were free from both pork and bovine gelatin.

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