cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kab. sleman,
Daerah istimewa yogyakarta
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 1,956 Documents
 181   182   183   184   185 
Review on Melanin Application as an Antibacterial and Antioxidant Agent in Food Packaging Mustakim, Zainal; Prasetya, Agus; Wintoko, Joko; Kayati, Fitri Nur; Purnomo, Chandra Wahyu
Indonesian Journal of Chemistry Vol 24, No 6 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.95550

Abstract

One of the solutions to reduce food waste is creating innovative food packaging to lengthen its shelf life. This type of packaging can be produced by incorporating natural antimicrobials and antioxidation agents such as melanin. Various biologically active and multifunctional properties are associated with this biomacromolecule, i.e., antioxidants, antibacterial properties, and free radical scavengers. Thus, melanin is an indispensable component. It is expected that food packaging manufactured from natural materials containing melanin will have several advantages, including biodegradability, antioxidant ability, and antibacterial activity. A review of melanin as an antibacterial and antioxidant agent from many different sources that is utilized as an additive in food packaging is presented.
Preparation, Structural Identification, and Biomedical Evaluation of Some New Complexes Abbas, Alyaa Khider; Fadhil, Asmaa Edrees
Indonesian Journal of Chemistry Vol 24, No 6 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.95759

Abstract

A new nano azo ligand, [2-amino-6-oxo-6,7-dihydro-1H-purin-8-yl)diazenyl)nitrobenzene (AH), and its Ag(I), Cu(II), and Zn(II) complexes were successfully synthesized and characterized using elemental analyses, magnetic susceptibility, molar conductance, and spectroscopic techniques (FTIR, UV-vis, ¹H-NMR), along with thermal analysis. FTIR confirmed the ligand acts as a neutral N,N-bidentate. The metal-to-ligand ratio was determined to be 1:1 for Ag(I) and Zn(II) complexes and 1:2 for the Cu(II) complex. Stability constants and Gibbs free energy, assessed via spectrophotometry, indicated high stability for all complexes. SEM and X-ray diffraction revealed nanoscopic properties for the Ag(I) and Cu(II) complexes. The antimicrobial activity against Staphylococcus aureus, Klebsiella pneumoniae, and Candida albicans species showed good efficiency compared to reference drugs. The ligand also exhibited moderate antioxidant activity using the DPPH assay. Additionally, the Zn(II) complex demonstrated effective anti-inflammatory activity, promoting wound healing within 14 days, compared to 16 days with silver sulfadiazine and 18 days without treatment.
New Insights of Response Surface Methodology Approach in Optimizing Total Phenolic Content of Zanthoxylum acanthopodium DC. Fruit Extracted Using Microwave-Assisted Extraction and the Impact to Antioxidant Activity Sumaiyah, Sumaiyah; Murwanti, Retno; Illian, Didi Nurhadi; Lubis, Muhammad Fauzan; Tampubolon, Keshia
Indonesian Journal of Chemistry Vol 24, No 6 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.95922

Abstract

Zanthoxylum acanthopodium DC., a unique spice plant from North Sumatra, is rich in beneficial secondary metabolites, particularly phenolic compounds. This study utilized the microwave-assisted extraction method to enhance the extraction of these bioactive compounds. The goal was to determine the optimal extraction conditions, including solvent concentration (X1), microwave power (X2), and extraction time (X3) to maximize the total phenolic content (TPC) of Z. acanthopodium fruit. A Box-Behnken design, part of response surface methodology, was used with three factors at three levels: X1 (50%, 75%, and 100% ethanol in water), X2 (180, 300, and 450 W), and X3 (3, 8.5, and 14 min). The phenolic compounds in the optimized extract were identified using LC-HRMS, and its antioxidant activity was measured using radical scavenging activity assays. The statistical analysis indicated a significant quadratic model (p-value < 0.05), with a high R2 of 86.25%. Optimal conditions for maximum TPC (159.637 ± 5.72 mg GAE/g) were achieved with 50% ethanol, 450 W, and 8.5 min, outperforming conventional extraction methods. Compared to the non-optimized extract, the optimized extract also exhibited strong antioxidant activity, particularly in DPPH radical inhibition. This method successfully optimized TPC in Z. acanthopodium fruit, enhancing its antioxidant properties.
Synthesis and Characterization of Aluminosilicate Catalysts from Volcano Mud for Biofuel Production with Different Feedstocks Hartati, Hartati; A'yuni, Qurrota; Dewi, Nita Safira; Firda, Putri Bintang Dea; Izzah, Adiba Naila; Prasetyoko, Didik; Harmami, Harmami; Ahmad, Shahrul Nizam
Indonesian Journal of Chemistry Vol 24, No 6 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.96149

Abstract

The increasing awareness of sustainable development goals has led to the intensive development of biofuel as a substitute for fossil fuels. This study investigates the potency of volcano mud (VM) as the precursor in synthesizing aluminosilicate catalysts for biofuel production. Three catalysts were synthesized, A3, A3T, and A5, in a manner to investigate the effect of tetrapropylammonium hydroxide (TPAOH) addition and hydrothermal time on the crystallinity, Si/Al ratio, and textural properties of the catalysts. The catalytic activity of the synthesized catalysts was evaluated in two different qualities of feedstock, i.e., oleic acid (OA) and waste cooking oil (WCO). It is found that A5 which is synthesized with longer hydrothermal of 5 h has desirable properties, a high mesoporous surface area of 159 m2/g, and a high acidity of 0.263 mmol/g. Catalyst A5 is proven to have similarly high catalytic activity in both WCO and OA feedstock, achieving a liquid yield of 93% with FAME selectivity of 95% for WCO and 95% liquid yield and FAME selectivity of 99% for OA feedstock. These results suggest that A5 is a versatile catalyst in biofuel production from either high or low-quality feedstocks.
Volatilomics Profiling of Counterfeit Perfume by Gas Chromatography Hyphenated to Mass Spectrometry and Fourier-Transformed Infrared Spectroscopy Hidayah, Siti Nurul; Suma, Artania Adnin Tri; Lukitaningsih, Endang
Indonesian Journal of Chemistry Vol 24, No 6 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.96313

Abstract

To prevent deleterious effects on consumers and potential health damage caused by counterfeit perfumes, this study aims to distinguish the original perfume from its suspected counterfeit products. Fingerprint and volatilomics profiling was performed using attenuated total reflection-Fourier infrared spectroscopy (ATR-FTIR) and gas chromatography hyphenated to mass spectrometry (GC-MS). Headspace (HS)-GC-MS was optimized to analyze perfume samples containing water. In the presence of water, our optimized HS-GC-MS method shows linalool's consistent signal intensity, providing an alternative analytical method for water-based perfume formulation. The GC-MS chemical characterization revealed 45 compounds detected in the original sample but only four compounds were detected in the counterfeit products: linalool, citronellol, methyl jasmonate, acetic acid, and propanol. This suggests a clear difference in the formulation of counterfeit products. Counterfeit products also cheat by using a lower amount of ingredients. Relative quantification shows that linalool in counterfeit products was as low as only 5.1% of the amount in the original product. In addition, cheaper and hazardous materials like methanol and 6,7-dihydrogeraniol were detected in counterfeit products. The combination of ATR-FTIR, GC-MS, and HS-GC-MS demonstrated fast authentication of counterfeit perfumes for routine quality control purposes and the possibility of water-based perfume analysis.
Magnetically Active GO-Fe3O4 Nanocomposite for Enhanced Rhodamine B Removal Efficiency Souhuat, Alexander; Aritonang, Henry Fonda; Koleangan, Harry Steven Julius
Indonesian Journal of Chemistry Vol 24, No 6 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.96383

Abstract

According to the World Bank study, approximately 17–20% of water contamination is attributed to the textile industry. The quantity of waste produced increases as a result of increased productivity. Textile wastewater contains dyes such as rhodamine B (RhB), which are hazardous and challenging to remove using standard methods. Adsorption utilizing nano-adsorbents has been widely researched and developed to remove dyes from the environment because of its numerous advantages. Graphene oxide-magnetite (GO-Fe3O4) has been extensively explored as an adsorbent due to its large surface area, strong bonding, and ease of separation from water. In this study, GO-Fe3O4 was synthesized by combining GO from coconut shell with Fe3O4 from iron sand as an absorbent to lower the amount of RhB. Various analytical techniques, including XRD, SEM-EDS, TEM, FTIR, and UV-vis, were employed to examine the properties of the composites. The GO-Fe3O4 exhibited a maximum adsorption capacity of 34.590 mg/g under specific conditions, i.e., 0.5 g adsorbent dosage, pH 4, and a 2 h contact time. The adsorption followed the pseudo-second-order kinetics model with 0.00016 mg/g min adsorption rate while the adsorption isotherm followed the Langmuir model where adsorbent surfaces are spread homogeneously by forming a monolayer.
Forensic Discrimination of Lipstick Stains Using Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy and Pattern Recognition Techniques Azis, Mohd Afiq Mohd; Mahat, Naji Arafat; Maarof, Hasmerya; Azman, Sarah Aina
Indonesian Journal of Chemistry Vol 24, No 6 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.97097

Abstract

Lipstick stains discovered on objects (such as drinking cups) may be utilized as evidence and/or lead in forensic investigations by chemical analysis. Hence, this study analyzed two brands of lipstick stains' organic composition on paper cups over 0, 24, and 48 h of exposure using attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), coupled with pattern recognition techniques of principal component analysis (PCA) and linear discriminant analysis (LDA). Spectral analysis revealed several functional group differences between the two brands of lipstick, viz. Wardah (W) and Silkygirl (S) stains, particularly in the fingerprint region of 1800–650 cm−1. Application of PCA (variance of ≥ 70%) and LDA successfully provided the suitable means for categorically classifying (a) the different brands of lipstick, (b) the male and female volunteers, as well as (c) the different periods of exposure. The fact that the cross-validation correct classification rates for all the LDA models exceeded 90.0%, their suitability for forensic provenance application of lip stains appears statistically supported. Hence, such an approach to combine the non-destructive ATR-FTIR analysis with PCA and LDA is not only easy and cost-effective but also forensically relevant for enabling the data mining process for forensic intelligence.
Physicochemical Characterization of Chitosan-Multiwalled Carbon Nanotubes Hybrid Material for Ofloxacin Delivery Khudair, Zainab Jasim; Kadam, Zeina Mohammad
Indonesian Journal of Chemistry Vol 24, No 6 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.97160

Abstract

The present study involved the synthesis of a bioactive composite material using chitosan (CS) and multi-walled carbon nanotubes (MWCNTs) through the free radical polymerization method. The resulting composite material was comprehensively characterized using various experimental techniques, such as Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The quantification of the swelling behavior involved the measurement of changes in the weight of the sample as a function of the time it was immersed in an aqueous buffered solution. The findings indicated that the maximum drug-loading rate of ofloxacin medication (OFL) was 86%. Moreover, the pH sensitivity of the poly acrylic acid grafting multi-walled carbon nanotubes p(CS-co-AA)/MWCNTs nanocomposite facilitated the substantial release of a significant quantity of medication in aqueous buffered solution at a pH of 1.2. The average rate of drug release was measured to be 76% after 72 h duration. On the other hand, the release of the drug at pH 5 and 7.4 was 42% and 32%, respectively. According to the reported findings, the p(CS-co-AA)/MWCNTs carrier has a favorable capacity to control the release of the OFL drug into the intended medium while reducing potential negative effects.
Analysis of Hg(II) Metal by Voltammetric Method Using a Carbon Electrode Modified with EDTA from Used Tire Waste Sukoma, Sukoma; Alva, Sagir; Safitri, Eka; Julinawati, Julinawati; Mustanir, Mustanir; Fonna, Syafrizal; Ihsan, Muhammad; Dara, Fitri; Dayanti, Meri; Arifin, Ahmad Kamal; Suhud, Khairi
Indonesian Journal of Chemistry Vol 24, No 6 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.97561

Abstract

Development of a carbon electrode sensor from used tire waste via pyrolysis, modified with ethylenediaminetetraacetic acid (EDTA) for mercury detection using the cyclic voltammetry (CV) method. EDTA plays a role in metal complexation due to its strong response to mercury metal. The FTIR results of the carbon electrode and EDTA show a C–N bond at a wavenumber of 1,217.08 cm−1, indicating the presence of EDTA. The SEM results reveal a clear difference between the unmodified carbon electrode and the EDTA-modified carbon electrode. The calibration graph is linear, with an R2 value of 0.9961, a sensitivity of 0.3472, as well as LoD and LoQ values of 0.03 and 0.08 ppm, respectively. The correlation coefficient is less than 2%, and the %recovery is within the allowable error range. Mercury measurements in Sungai Mas water samples, Aceh Barat, using voltammetry and AAS, exceed the threshold set by Indonesian Government Regulation (PPRI) No. 22 of 2021. The t-test results for the two Hg measurement methods at a 5% significance level (α) show that tcalculated < ttable (0.083 < 2.571). This indicates no significant difference between the voltammetry and AAS methods for measuring Hg concentrations in water.
A Comparative Study of LiNCA Cathode Recycled from Spent Lithium-Ion Batteries and Synthesized from Metal Precursor Jumari, Arif; Apriliani, Enni; Yudha, Cornelius Satria; Purwanto, Agus; Syahrial, Anne Zulfia; Pita Rengga, Wara Dyah
Indonesian Journal of Chemistry Vol 24, No 6 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.98276

Abstract

Spent lithium NCA (LiNCA) battery was recycled using organic and inorganic acids and the performances were compared against the cathode synthesized from precursor. The metals in the spent cathode were leached using sulfuric or citric acid and coprecipitated into ternary metal oxalate (TMO) after reduction and lithium separation. Subsequently, the coprecipitated solution was used for cathode synthesis. Leaching efficiencies for nickel, cobalt and aluminum using citric acid were 85.6, 94.1, and 99%, respectively, while the efficiencies using sulfuric acid were 96, 98, and 100%, respectively. TMO produced from coprecipitation had the same physical characteristics. It was important to acknowledge that all cathodes also had similar physical characteristics. The electrochemical tests showed that commercial cathodes had the highest capacity of 150 mAh/g. This was followed by those from precursors, sulfuric acid leaching, and citric acid leaching, which recorded 142, 135, and 130 mAh/g, respectively. Based on the cycle test at 1C, the sample from citric acid leaching was 86% after 20 cycles compared to others at 82–83%. The results suggested that spent LiNCA could be regenerated into new cathodes using acid with performance comparable to those synthesized from precursor. This presented a viable alternative for LiNCA cathode synthesis.

Page 183 of 196 | Total Record : 1956

 181   182   183   184   185 

Filter by Year

2001 2025


Reset
Filter By Issues
All Issue Vol 25, No 5 (2025) Vol 25, No 4 (2025) Vol 25, No 3 (2025) Vol 25, No 2 (2025) Vol 25, No 1 (2025) Vol 24, No 6 (2024) Vol 24, No 5 (2024) Vol 24, No 4 (2024) Vol 24, No 3 (2024) Vol 24, No 2 (2024) Vol 24, No 1 (2024) Vol 23, No 6 (2023) Vol 23, No 5 (2023) Vol 23, No 4 (2023) Vol 23, No 3 (2023) Vol 23, No 2 (2023) Vol 23, No 1 (2023) Vol 22, No 6 (2022) Vol 22, No 5 (2022) Vol 22, No 4 (2022) Vol 22, No 3 (2022) Vol 22, No 1 (2022) Vol 22, No 2 (2022) Vol 21, No 6 (2021) Vol 21, No 5 (2021) Vol 21, No 4 (2021) Vol 21, No 3 (2021) Vol 21, No 2 (2021) Vol 21, No 1 (2021) Vol 20, No 6 (2020) Vol 20, No 5 (2020) Vol 20, No 4 (2020) Vol 20, No 3 (2020) Vol 20, No 2 (2020) Vol 20, No 1 (2020) Vol 19, No 4 (2019) Vol 19, No 3 (2019) Vol 19, No 2 (2019) Vol 19, No 1 (2019) Vol 18, No 4 (2018) Vol 18, No 3 (2018) Vol 18, No 2 (2018) Vol 18, No 1 (2018) Vol 17, No 3 (2017) Vol 17, No 2 (2017) Vol 17, No 1 (2017) Vol 16, No 3 (2016) Vol 16, No 2 (2016) Vol 16, No 1 (2016) Vol 15, No 3 (2015) Vol 15, No 2 (2015) Vol 15, No 1 (2015) Vol 14, No 3 (2014) Vol 14, No 2 (2014) Vol 14, No 1 (2014) Vol 13, No 3 (2013) Vol 13, No 2 (2013) Vol 13, No 1 (2013) Vol 12, No 3 (2012) Vol 12, No 2 (2012) Vol 12, No 1 (2012) Vol 11, No 3 (2011) Vol 11, No 2 (2011) Vol 11, No 1 (2011) Vol 10, No 3 (2010) Vol 10, No 2 (2010) Vol 10, No 1 (2010) Vol 9, No 3 (2009) Vol 9, No 2 (2009) Vol 9, No 1 (2009) Vol 8, No 3 (2008) Vol 8, No 2 (2008) Vol 8, No 1 (2008) Vol 7, No 3 (2007) Vol 7, No 2 (2007) Vol 7, No 1 (2007) Vol 6, No 3 (2006) Vol 6, No 2 (2006) Vol 6, No 1 (2006) Vol 5, No 3 (2005) Vol 5, No 2 (2005) Vol 5, No 1 (2005) Vol 4, No 3 (2004) Vol 4, No 2 (2004) Vol 4, No 1 (2004) Vol 3, No 3 (2003) Vol 3, No 2 (2003) Vol 3, No 1 (2003) Vol 2, No 3 (2002) Vol 2, No 2 (2002) Vol 2, No 1 (2002) Vol 1, No 3 (2001) Vol 1, No 2 (2001) Vol 1, No 1 (2001) ARTICLE IN PRESS Article in press More Issue