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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 1,956 Documents
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Preliminary Study on Leaching Capacity of Rare Earth Elements from Coal Fly Ash by Using Citric Acid Solution Winoto, Gilbert; Mulyono, Panut; Suyanti, Suyanti; Prasetya, Agus
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99763

Abstract

Rare earth elements (REEs) are chemical elements in the III B and lanthanide groups on the chemical periodic table. Extracting REEs from secondary resources (such as coal fly ash) could be environmentally friendlier than extracting REEs from primary resources. Coal fly ash was chosen because of its attractive REE availability and to minimize the pollution problem created by coal fly ash dumping. Citric acid is used as the leaching agent because of its biodegradability, relatively safe vis-à-vis mineral acid commonly used in the REE leaching, and its non-damaging nature to coal fly ash’s properties as construction material. The leaching experiment was conducted at temperature variations of 30, 50, and 85 °C, with liquid-solid ratio (L/S) of 5, 10, and 15 mL/g in 50 mL of 0.01 mol/L citric acid solution. The leaching experiments were conducted in a water bath shaker. It was found that increasing L/S and temperature mainly contributed to increasing cerium leaching capacity.
Enhancing Surface Properties Through the Applications of Silica Superhydrophobic Coating Widati, Alfa Akustia; Salsabilah, Andina Fitriyah; Aisyah, Aisyah; Rahmawati, Zeni; Wan Abdullah, Wan Nazwanie
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99793

Abstract

Superhydrophobic silica coatings have gained enormous attention due to their significant contribution to self-cleaning, anti-fouling, anti-icing, anti-corrosion, and moisture-resistance. This mini-review provides an overview of silica surface modification, including functionalization, roughness control, and deposition methods. Functionalization aims to reach hydrophobic properties by the application of low surface energy compounds. Surface roughness control at the micro- and nano-scale across different scales also results in various surface topographies. The type of deposition technique also influences the coating surface properties, including roughness texture, adhesion, and coating thickness. This paper also explains the challenges and gaps of research rarely reported by previous studies, such as the stability of coating in harsh environments, scalability, cost-effectiveness, and sustainability. Furthermore, this article also addresses promising future innovations in developing long-lasting coatings, multifunctional properties, and economic points of view.
Reversed-Phase High-Performance Liquid Chromatography (RP-HPLC) Quantitative Analysis of L-Arginine in Freeze-Dried Red Dragon Fruits (Hylocereus polyhizus) Saad, Wan Mazlina Md; Isha, Mohd Qamarul Aizat; Zan, Muhamad Faizzudin Mohamad; Sallehoddin, Siti Mastura Hanim
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.100908

Abstract

Hylocereus polyrhizus is an exotic fruit with distinct bright colors and tastes that make it popular among many regions of the world. The fruit is cultivated worldwide and firmly established as a source of nutrition, thus, making good value in terms of its potential harvesting by various methods. However, prior reviews have documented weak scientific backing sparsely around extraction efficiency and favorable conditions for optimal yield. This study aimed to quantify the crude L-arginine content for both kinds of dragon fruiting by an RP-HPLC isocratic method, thus establishing a reliable and efficient approach for their detection. This study has revealed that short extraction times are beneficial in retaining L-arginine content since more extended extractions can result in the degradation of other components. Thus, this study opens further avenues toward exploring red dragon fruit as a natural source of L-arginine and advancing functional and nutraceutical products.
From Synthesis to Application: Advances in Macrocyclic Complexes Abbas, Nabaa; Alabdali, Ammar Jihad; Al-Mashhadani, Mohammed Hussein; Alhuwaymil, Zamzam; Alyami, Mohammed Saeed; Alshareef, Sohad Abdulkhaleq
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.101121

Abstract

Macrocyclic complexes, characterized by their large ring structure incorporating multiple donor atoms, have garnered significant attention due to their pivotal roles in both natural and synthetic systems. This review examines the synthetic methods of macrocyclic ligands and their metal complexes, highlighting their structural intricacies and coordination behaviors. The multifaceted applications of these complexes span various domains in pharmaceuticals as they enhance drug solubility and bioavailability; in catalysis, they facilitate oxidation reaction and water splitting processes; in sensing, calixarenes serve as selective ion and molecule detectors; and in biomedicine, certain macrocyclic compounds exhibit potential in targeting cancer stem cells. Despite these advancements, challenges persist, notably in achieving efficient macrocyclization and ensuring stability under diver’s conditions. Future directions emphasize the incorporation of stimuli-responsive supramolecular assemblies to enhance drug delivery mechanisms and therapeutic interventions. This comprehensive overview emphasizes the importance of macrocyclic complexes in advancing chemical science and their potential in addressing contemporary scientific challenges.
Synthesis of Zinc-Nitrogen-Codoped Zirco-Titania Composite (Zn-N-Codoped ZT) as a Photocatalyst for Photodegradation of Phenol Under Visible Light Irradiation Utami, Nadya Putri; Kurniawan, Rian; Pradipta, Mokhammad Fajar; Syoufian, Akhmad
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.101519

Abstract

Zinc (Zn) and nitrogen (N) were introduced as codopants in zirco-titania (Zn-N-codoped ZT) composite photocatalyst. This research primarily aimed to investigate the codoping effect of Zn and N in ZT composite for the photodegradation of phenol under visible light irradiation. The composite was prepared through the sol-gel method, where a suspension of ZrO2 mixed with Zn dopant (wZn/wTi = 1–9%) and N dopant (wN/wTi = 10%) was added dropwise to TTIP in ethanol solution. Calcination was conducted at the temperature of 500, 700, and 900 °C. FTIR shows an increasing absorbance at 1095 cm−1 as the increasing Zn up to 5%. XRD reveals that Zn-N cooping influences anatase and rutile crystallization above 700 °C. SEM-EDX of 5Zn-N-ZT-500 displays a spherical and homogeneous morphology. Photodegradation of 10 mg L−1 phenol solution under visible light irradiation was conducted to evaluate the photocatalytic activity. The composite with 5% Zn and 10% N calcined at 900 °C achieved the lowest band gap of 2.90 eV. The highest phenol degradation percentage after 120 min irradiation, 51.96%, was attained by the composite containing 5% Ni and 10% N calcined at 500 °C (kobs = 8.4 × 10−3 min−1).
Lysis Buffers for Detecting Pork Content in Food Products Khoiriah, Ulfah Lailatul; Baydillah, Pramudja; Darmawan, Raden; Nasori, Nasori; Taufany, Fadlilatul; Gunawan, Setiyo
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.101620

Abstract

The increasing number of counterfeit processed food products with non-halal ingredients, such as pork, has caused public concern about the halalness of Indonesian food products, especially in the Muslim community. This issue has prompted the development of halal authentication techniques, including deoxyribonucleic acid (DNA) isolation followed by polymerase chain reaction (PCR) amplification to detect pork DNA. The main purpose of this research was to modify the lysis buffer using tris-ethylenediaminetetraacetic acid, cetyl trimethylammonium bromide, salt, alkaline, and urea. Two DNA extraction methods were evaluated using kit-based and conventional methods with modified lysis buffer. Using a fluorometer, it was proven that the conventional method with modified urea lysis buffer produced quite competitive DNA concentrations (119 ng for pork meat and 100.05 ng for pork sausage), as confirmed by real-time PCR analysis. As a result, the modified urea lysis buffer can be further developed because it is more affordable.
Effect of Sodium Citrate and Urea as Additive on the Synthesis of Hydroxyapatite from Blood Cockle Shells: Kinetics and Adsorption Isotherms Study of Coomassie Brilliant Blue Putri, Dhea Rahmanda; Jamarun, Novesar; Septiani, Upita; Sisca, Vivi
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.102465

Abstract

Hydroxyapatite (HAp) was synthesized from blood cockle shell waste by the sol-gel method, incorporating sodium citrate and urea as additives for Coomassie brilliant blue (CBB) adsorption. The synthesis included HAp without additives (HAp 1) and with 30 g/L of urea and varying sodium citrate concentrations of 0 (HAp 2), 0.1 (HAp 3), 0.2 (HAp 4), 0.3 (HAp 5), 0.4 (HAp 6), and 0.5 (HAp 7) g/L. HAp 4 showed the highest adsorption capacity at 96.60 mg/g. FTIR analysis of HAp 4 revealed adsorption bands for O−H and PO43− groups. XRD analysis indicated a crystal size of 24.55 nm with low crystallinity. SEM-EDS analysis showed a Ca/P ratio of 1.28, with an irregular shape due to agglomeration and an average particle size of 1.16 µm. SAA analysis found a surface area of 107.18 m2/g, a pore size of 12.55 nm, and a pore volume of 0.36 cm3/g. HAp 4 followed the Langmuir and pseudo-second-order isotherm models in CBB adsorption and demonstrated five-time reusability, proving it to be an effective adsorbent for CBB dyes.
Identification of Anti-Inflammatory Components from Launaea sarmentosa Using In Vitro Cell Model Nguyen, Thanh Quoc Chau; Vo, Khang Thanh; Duong, Cua Dinh; Huynh, Toan Phu; Ca, Lieu Thi Thuy; Dang, Giao Huynh
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.103167

Abstract

Launaea sarmentosa (Willd.) Kuntze, a medicinal herb known for treating inflammatory diseases, was examined for its anti-inflammatory compounds to identify novel therapies. This study indicated that hexane and ethyl acetate fractional extracts significantly reduced NO secretion in LPS-stimulated RAW264.7 macrophages, indicating the presence of potential anti-inflammatory compounds. Additionally, four anti-inflammatory compounds, including taraxasteryl acetate (1), esculetin (2), pyrimidine-2,4-dione (3), and 5-hydroxypryrolidin-2-one (4), were isolated, and their structures were characterized using 1D and 2D-NMR. This study marked the first report of taraxasteryl acetate, pyrimidine-2,4-dione, and 5-hydroxypryrolidin-2-one being isolated from this species. Furthermore, these compounds exerted their anti-inflammatory role by inhibiting NO production and TNF-α expression. Thus, this study contributes to identifying anti-inflammatory constituents from L. sarmentosa and highlights a potential approach for developing phytotherapeutic agents.
Taguchi-Assisted of Ligninase Production by Phanerochaete chrysosporium ITB Isolate Biofilm Mutmainah, Siti; Wahab, Roswanira Abdul; Sanjaya, Eli Hendrik; Susanti, Evi
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.103401

Abstract

The Phanerochaete chrysosporium ITB isolate can form a biofilm when grown on a support material, in which the attached cells are in a sessile state, which allows the cells to thrive better compared to other conditions. This study uses the Taguchi model to explore the ligninase (LiP, MnP, and laccase) production by P. chrysosporium ITB isolates immobilized on polypropylene (PP). This research was carried out in a laboratory experimental manner, which consisted of stages that included the preparation of spore suspension and optimization of conditions for the production of ligninase using Taguchi. The results showed that lignin peroxidase (LiP) and laccase (420.1 and 78.69 U/mg) enzymes were optimally produced using an inoculum size of 5 × 103 spore/mL, with a growth duration of 6 d at pH 3 and required 0.4 g/mL of PP to yield a 0.36% biofilm weight. The optimal production of MnP (410.23 U/mg) warranted an inoculum size of 5 × 102 spore/mL with incubation of 4 d at pH 5, and immobilization on 0.20 g/mL PP, to give a final biofilm weight of 0.09%. These results indicate a potential LiP and laccase production by the biofilm of P. chrysosporium on the polypropylene as supporting materials.
Tirucallane-Type Triterpenoids from the Dysoxylum gaudichaudianum Stem Bark: Phytochemical Study and Cytotoxicity Evaluation Against Human HeLa Cervical Cancer Cells Maira, Faizah; Naini, Al Arofatus; Mayanti, Tri; Fajriah, Sofa; Kusumiyati, Kusumiyati; Supratman, Unang
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.103523

Abstract

A total of three tirucallane-type triterpenoids were successfully isolated from the n-hexane extract of the stem bark of Dysoxylum gaudichaudianum: 4,4,14-trimethyl-3-oxo-24-nor-5α,13α,14β,17α,20S-chol-7-en-23-oic (1), toonapubesin B (2), and 3β,22S-dihydroxy-tirucalla-7,24-dien-23-one (3). These compounds were isolated from D. gaudichaudianum for the first time. Structural characterization of the isolated compounds was accomplished through a series of spectroscopic analyses, including HR-TOF-MS, IR, and NMR. Based on previous reports, compound 1 was isolated from a member of the Meliaceae family for the first time. The cytotoxic properties of the isolated tirucallane-type triterpenoids were evaluated against cervical HeLa cancer cells. Among them, compounds 1 and 3 were inactive, with IC50 values > 100 µM, while compound 2 exhibited the highest cytotoxicity, with an IC50 value of 29.23 µM, with moderate activity. A structure–activity relationship also indicated the variation in cytotoxicity attributed to substituent effects within the molecular structures. The modification of the side chain in tirucallane-type triterpenoids was shown to be essential for their cytotoxic activity against human cervical cancer lines.

Page 192 of 196 | Total Record : 1956

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