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INDONESIA
Indonesian Journal of Chemistry
Published by Universitas Gadjah Mada
ISSN : 14119420     EISSN : 24601578     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
Indonesian Journal of Chemistry is an International, peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry including applied chemistry. The journal is accredited by The Ministry of Research, Technology and Higher Education (RISTEKDIKTI) No : 21/E/KPT/2018 (in First Rank) and indexed in Scopus since 2012. Since 2018 (Volume 18), Indonesian Journal of Chemistry publish four issues (numbers) annually (February, May, August and November).
Arjuna Subject : -
Articles 25 Documents
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Search results for , issue "Vol 23, No 5 (2023)" : 25 Documents clear
Volatile Organic Compounds and Antioxidant, Cytotoxic Activities of Extracts from the Leaves of Grewia bulot Ty Viet Pham; Duc Viet Ho; Anh Tuan Le; Y Duy Ngo; Nhan Thi Thanh Dang; Thang Quoc Le; Bao Chi Nguyen
Indonesian Journal of Chemistry Vol 23, No 5 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.84619

Abstract

This research aims to determine the volatile compounds present in Grewia bulot leaf extracts and evaluate their cytotoxic and antioxidant activities. The volatile constituents of the n-hexane and dichloromethane extracts were identified by using gas chromatography–mass spectrometry. The main compounds identified in the former were neophytadiene (18.2%), methyl palmitate (14.4%), methyl linoleate (9.7%), β-sitosterol (4.5%), and methyl stearate (3.4%), while those in the latter were palmitic acid (9.8%), hexadecane (7.4%), octadecane (6.0%), neophytadiene (5.3%), and 2-tert-butoxyethanol (5.3%). The cytotoxicities of the extracts were examined against four human cancer cell lines (SK-LU-1, Hep-G2, MCF-7, and KB), while their antioxidant activities were assessed using the DPPH radical scavenging assay. The n-hexane and dichloromethane extracts displayed weak activity against these cancer cell lines, with IC50 values ranging from 90.60 ± 3.49 to 98.27 ± 2.77 µg/mL. All extracts showed antioxidant activities, and the methanol extract exhibited the strongest at an SC50 value of 9.39 ± 0.90 µg/mL. This is the first report on the volatile constituents and bioactivities of G. bulot leaf extracts, suggesting their potential application as antioxidants.
Enhancing the CO2 Adsorption Performance of UiO-66 by Imidazolium-Based Room-Temperature Ionic Liquids (RTILs) Incorporation Laela Mukaromah; Andi Haryanto; Yessi Permana; Aep Patah
Indonesian Journal of Chemistry Vol 23, No 5 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.84669

Abstract

Functionalization of metal-organic frameworks resulting in efficient CO2 adsorption materials became substantial in preventing the worsening environment upon the emission of CO2. In this study, several room-temperature ionic liquids (RTILs) with an imidazolium-based cation of 1-butyl-3-methylimidazolium [bmim]+ and anions of bis(trifluoromethylsulfonyl)imide [TFSI]−, trifluoromethanesulfonate [OTf]−, hexafluorophosphate [PF6]−, and tetrafluoroborate [BF4]− were incorporated into UiO-66 by wet impregnation method under air. The RTILs/UiO-66 composites were characterized by PXRD, FTIR, TGA, nitrogen physisorption, and CO2 adsorption. Based on the type of anions of imidazolium-based RTILs, the CO2 uptake of RTILs/UiO-66 composites followed the trend: [OTf]− > [TFSI]− > [PF₆]− > [BF₄]− at low temperature (273 K) and pressure (100 kPa). The CO2 uptake of pristine UiO-66 increased approximately 1.5 times upon incorporating [bmim][OTf]. The type of anions of imidazolium-based RTILs influences the CO2 adsorption performance of RTILs/UiO-66 composites in which anions containing fluoroalkyl group ([OTf]−, [TFSI]−) exhibited a higher CO2 uptake compared to inorganic fluorinated anions ([BF4]−, [PF6]−). Hence, the incorporation of hydrophobic imidazolium-based RTILs showed a potential to enhance the performance of UiO-66 for CO2 adsorption application.
Determination of Heavy Metal Concentrations in Household Dusts in Irbid and Mafraq Cities, Jordan Asmaa Ali Al-Serhan; "Ayat Allah" Al-Massaedh; Idrees Faleh Al-Momani
Indonesian Journal of Chemistry Vol 23, No 5 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.85062

Abstract

The objective of this study was to measure the concentrations of selected heavy metals (Pb, Cd, Zn, Cu, Fe, Cr, Co, Ni, and Mn) in house dust collected during the summer and winter seasons from Mafraq and Irbid cities, Jordan. The average concentrations (±SD) of the metals were found to be 66.8 (±22.4), 10.8 (±3.75), 366 (±108), 81.6 (±43.9), 7586 (±4304), and 37.2 (±15.4) mg/kg, for Pb, Cd, Zn, Cu, Fe, and Cr, respectively, in the summer season. The average concentrations (±SD) of the metals were found to be 92.8 (±65.5), 5.10 (±4.75), 305 (±160), 144 (±163), 5385 (±3812), 27.1 (±15.1), 18.7 (±3.70), 42.2 (±15.1), and 139 (±69.2) mg/kg, for Pb, Cd, Zn, Cu, Fe, Cr, Co, Ni, and Mn, respectively, in the winter season. The influence of different heating systems on the concertation of heavy metal was examined by comparing the results obtained in both summer and winter seasons. The concentrations of the metals in this study were compared with those reported by other researchers around the world. This study shows that the significant accumulation of heavy metals in house dust should be considered a serious risk to the health of residents in Mafraq and Irbid cities.
Synthesis of Cellulose Acetate from Screw Pine (Pandanus tectorius) Leaves for Enhancing Water Permeability and Fouling Resistance of PVDF Membrane Elyna Wahyu Trisnawati; Venty Suryanti; Edi Pramono; Indri Sri Cahyani; Diah Safriyani
Indonesian Journal of Chemistry Vol 23, No 5 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.85726

Abstract

Cellulose derivatives from natural resources continuously develop to find the best hydrophobic polymer-based membrane technology performance. This study was conducted to improve the hydrophilicity, performance, and anti-fouling of polyvinylidene fluoride (PVDF) membrane with cellulose acetate (CA) filler synthesized from screw pine (Pandanus tectorius) leaf cellulose. CA was synthesized by the Fischer esterification mechanism and the PVDF membrane was fabricated using the phase inversion method with 0.3% CA concentration. FTIR analysis of CA shows an absorption at 1700 cm−1 suggesting that the hydroxyl group of cellulose had been successfully substituted with an ester group (C=O), and CA has a high degree of substitution (DS) value of 3.50. Adding CA improved the hydrophilicity and anti-fouling properties of up to 86.45% of PVDF membranes. Furthermore, CA increased the value of water permeability 2–3 times than pristine PVDF membrane. The presence of CA enhanced the porosity of the PVDF membrane, which promoted the membrane's effectiveness for MB filtering. As a result, CA from screw pine leaf cellulose has promising features as a filler for PVDF membranes and potential dye filtration.
Drying of Merbau (Intsia bijuga) Sawdust Extract: Effect of Temperature on the Quality of Natural Dye Product Aswati Mindaryani; Vincent Sutresno Hadi Sujoto; Sandrina Christine Michelin Silalahi; Himawan Tri Bayu Murti Petrus; Edia Rahayuningsih
Indonesian Journal of Chemistry Vol 23, No 5 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.87624

Abstract

The textile sector leaves 80% of effluent untreated. Carcinogenic, mutagenic, and poisonous synthetic colors in textile waste streams harm the ecosystem. Biodegradable natural dyes are safer than synthetic dyes. Merbau sawdust is abundant in Papua but underutilized. Merbau wood (Intsia bijuga) has considerable tannin and dye potential. Tannin diffuses to the surface, coloring it brown in humid air or water. Merbau extract can be dried to make powdered natural dye. This study examines Merbau sawdust extract drying and natural dye quality at different temperatures. The drying process was carried out in a convective oven at 60, 75, and 90 °C. The data showed that the solid product of natural dye was already dried at 60–90 °C within 100 min. The content of tannin in the dried natural dye powder was analyzed by titration method. The tannin content in the solid product was 0.5–0.9 g tannin/g solid. The drying rate during the constant drying rate period is around 0.00137 to 0.00256 g/cm2 min. The effect of drying temperature (60 to 90 °C) on the tannin degradation is insignificant, based on the titration method and FTIR analysis.

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