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I Wayan Sutapa
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INDONESIA
Chemistry Indonesian Journal of Chemical Research
  • Indonesian Journal of Chemical Research (Indones.
  • Website
Published by Universitas Pattimura
ISSN : 23385359     EISSN : 26142627     DOI : 10.30598//ijcr.2021.-irm
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemistry Engineering Environmental Science
Indo. J. Chem. Res. is a journal that regularly publishes primary articles covering all branches of chemistry and its sub-disciplines. Published articles consist of complete research, short communication, and review articles. The scope of published articles is not limited to inorganic chemistry, physical chemistry, organic chemistry, analytical chemistry, and biochemistry. Editors can invite articles review of authors that includes the latest developments in the field of interest of certain chemicals. A contribution is open to researchers from all countries.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 314 Documents
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Microwave Assisted Hydrodistillation Essential Oil from Lime Peel Waste as Aromatherapy Candles Mustam, Mariaulfa; Azis, Hijrah Amaliah; Ramdani, Nurfika; Zalzabila, Nurafdaliana
Indonesian Journal of Chemical Research Vol 11 No 2 (2023): Edition for September 2023
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2023.11-aul

Abstract

Flavonoids belong to the extensive group of polyphenol compounds. They can function as antioxidants and antibacterials by denaturing bacterial cell proteins and damaging bacterial cells. One source of essential oils is lime peel, which is often discarded and goes unused. The distillation method utilizes microwaves, offering an alternative to conventional distillation techniques and resulting in enhanced effectiveness and efficiency. The Microwave Assisted Hydrodistillation (MAHD) method proves to be more energy-efficient, environmentally friendly, rapid, safe, and cost-effective. This study aims to assess the impact of the MAHD method on the quantity and quality of essential oils extracted from lime peels. Laboratory tests are conducted in accordance with Indonesian national standards. The overarching objective is to establish a process that transforms discarded lime peels into aromatherapy candles, contributing to respiratory health. The MAHD method is employed with a sample mass to distilled water solvent ratio of 1:1. The resulting essential oil undergoes analysis using the GC-MS method. According to the GC-MS test results, the compound with the highest percentage area is limonene at 98%. This is followed by trans-caryophyllene at 99% with a retention time of 12.422, and beta-selinene at 99% with a retention time of 13.191.
Bioprospective screening and characterization of isolates from Pterocarpus osun leaf and stem bark extracts Fadeyi, Adewale Elijah; Afolayan, Michael Olalekan; Adeniran, Oluremi Isola
Indonesian Journal of Chemical Research Vol 11 No 2 (2023): Edition for September 2023
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2023.11-ade

Abstract

Antimicrobial resistance (AMR) ranks among the top 10 world health challenges of the 21st century, predicted that it will cause approximately 10 million deaths in 2050. Therefore, more investigation into identifying new antibiotics from natural sources is inevitable. Compounds from the leaf and stem bark of Pterocarpus osun were isolated using column chromatography, screened for their bioactivities, and characterized using the FTIR spectroscopy method in the ongoing search for novel antimicrobial therapies. The isolates were tested for antibacterial and antifungal activities against eleven pathogenic organisms. The zones of inhibition ranged in diameter from 22 to 30 mm. The minimum inhibitory concentrations were determined. Thin-layer chromatography was used to determine the purity of the compounds, and their retention factor was calculated. This ranged between 0.2424 and 0.8151. The melting points of the compounds were also recorded, as are FTIR spectra ranging from 4000 to 400 cm-1. Some of the peaks recorded are typical of single bond (4000-25000 cm-1), double bond (2000-1500 cm-1) with confirmation in the fingerprint (1500-400 cm-1) region but none in the triple bond (2500-2000 cm-1) region of the spectra. The antimicrobial screening results show that the identified compounds can potentially lead to the discovery of novel antibiotic medications.
Antioxidant Activity, Cytotoxicity, and Identification of Secondary Metabolites of Kigelia africana from Waterpark Platinum Riau Fitri, Iis Yusma; Kurniawanti, Kurniawanti; Syahbirin, Gustini; Sugita, Purwantiningsih
Indonesian Journal of Chemical Research Vol 11 No 2 (2023): Edition for September 2023
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2023.11-iis

Abstract

Antioxidants can prevent reactive oxygen-associated diseases, which trigger carcinogenesis, cardiovascular disease, and premature aging. India and Africa have mostly practiced sausage trees (Kigelia africana) as traditional medicine, whereas Indonesia is still limited. The research aims to determine the phytochemistry and bioactivity of the n-hexane fractions from crude methanol extract of the leaves and bark of the sausage tree as antioxidants and their toxicity. The sausage tree is derived from Waterpark Platinum Riau. The sausage trees were macerated with methanol and fractionated by n-hexane and ethyl acetate. All samples were tested for their antioxidant to 1,1-diphenyl-2-picrylhydrazyl (DPPH) and cytotoxicity to Artemia salina Leach larvae. Phytochemical results of methanol crude extract, n-hexane, and ethyl acetate fractions of leaves and sausage bark showed the presence of all secondary metabolites except alkaloids in the n-hexane fraction. Antioxidant and cytotoxic activity of stem and leaf bark ethyl acetate fraction was stronger than crude methanol extract and n-hexane fraction. Based on LC-MS/MS data, the secondary metabolite components that have contributed strongly antioxidant activity of this study are flavonoid compounds such as kaempferol and the derivatives, lignans (cubebin), and steroids (pregnant).
Synthesis, Evaluation, and Molecular Docking Study of 4-Monoacyl Resorcinol Against Tyrosinase Enzyme Danova, Ade; Maulana, Yusuf Eka; Hermawati, Elvira; Chavasiri, Warinthorn
Indonesian Journal of Chemical Research Vol 11 No 2 (2023): Edition for September 2023
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2023.11-nov

Abstract

Tyrosinase is a crucial enzyme in melanin production to protect the skin from ultraviolet, leading to skin cancers. This study synthesized eight compounds of acyl resorcinol with long-chain carbon (1-8) and structurally elucidated by 1H and 13C NMR. The in vitro evaluation of eight synthesized compounds against tyrosinase enzyme showed that 4-heptanoyl resorcinol (6) exhibited high inhibitory activity compared with the kojic acid as standard. In addition, the molecular docking study demonstrated that 6 showed lower binding energy (-7.3 kcal/mol) than kojic acid (-6.9 kcal/mol) and possessed interaction with crucial residues in the active site.
Preparation and Characterization of Carboxymethyl Cellulose Production from Oil Palm Male Inflorescence as Food Stabilizer Jainal, Rahmat; Madusari, Sylvia; Sari, Vira Irma; Putri, Halida Adistya; Febriana, Dela
Indonesian Journal of Chemical Research Vol 11 No 2 (2023): Edition for September 2023
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2023.11-mat

Abstract

Male inflorescence residue of the oil palm rich in fibre and contains cellulose content and has the potential to synthesize Carboxymethyl Cellulose (CMC). Male inflorescence is considered necessary removed in the early stages of the oil palm cultivation process to develop stem size, string and robust root systems. This activity generates plentiful of oil palm male inflorescence residues in the plantation. The aim of this research is to synthesis and characterize CMC fabricated from oil palm male inflorescence (OPMI-CMC) waste for use as an ice cream stabilizer, using a variety of treatments, which are commercial CMC 0.2%, OPMI-CMC 0.1%, 0.2%, and 0.3%. The results showed that CMC can be produced from organic waste of male flowers of oil palm plants. The water content, pH, purity, and degree of substitution meet the standard. The optimal concentration of OPMI-CMC for ice cream stabilizer is 0.3% based on melting time and overrun value. The FTIR analysis shows that the main functional group of the OPMI-CMC is highly comparable. Therefore, to possibly be employed as an alternative to organic CMC for food stabilizers, other standards must be fulfilled, and further research is required.
Phytochemical Tests and Antioxidant Activities of the Rhips Ginger (Zingiber Officinale Var Amarum.) Hasanela, Nurani; Bandjar, Adriani; Yanyaan, Virenze K.; Hitijahubessy, Hendro
Indonesian Journal of Chemical Research Vol 11 No 2 (2023): Edition for September 2023
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2023.11-nur

Abstract

Ginger is a traditional plant that thrives and has essential functions, including an antioxidant. This study aimed to determine the phytochemical content and test the antioxidant activity of fresh white ginger and powdered ginger (Zingiber officinale var. Amarum.). Two methods are used in this research: the phytochemical test and the antioxidant activity test using DPPH. Phytochemical tests, such as flavonoid, phenolic, steroid, and saponin, were conducted qualitatively. The antioxidant activity test was carried out using a UV-Vis spectrophotometer. Fresh white ginger and powdered ginger were extracted using the maceration method with water solvent. The study results showed that the effects of fresh white ginger extract obtained a yield of 64.08%. Meanwhile, powdered ginger extract was 58.68%. Phytochemical test results of fresh white ginger extract and powdered ginger (commercial) showed positive results for flavonoid, phenolic, and saponin compounds while adverse effects for steroids. Antioxidant activity test on fresh white ginger extract with water solvent showed an IC50 value of 25.41 ppm. The powdered ginger extract (commercial) has an IC50 value of 36.70 ppm. The results showed fresh white ginger and powdered ginger had relatively high antioxidant activity.
Characterization and Kinetic Study of Methylene Blue Photocatalytic on ZnO/ZSM-5 Tehubijuluw, Hellna; Souhoka, Fensia Analda; Kusumawati, Yuly; Prasetyoko, Didik; Subagyo, Riki; Nugraha, Reva Edra; Jalil, Aishah Abdul
Indonesian Journal of Chemical Research Vol 11 No 2 (2023): Edition for September 2023
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2023.11-hln

Abstract

Photodegradation of organic pollutants depends significantly on the structure of metal oxide-based semiconductor photocatalysts. ZnO/ZSM-5 has shown the potential to significantly improve its photocatalytic efficiency for removing waterborne pollutants. ZnO/ZSM-5 has been reported to be an active catalyst for degrading methylene blue. These methods commonly involve various catalytic reactions, with the Langmuir-Hinshelwood process being used to describe the reaction kinetics. A kinetic study on the photocatalytic degradation of methylene blue using ZnO/ZSM-5 was conducted under UV-LED lamp irradiation. ZnO/ZSM-5 was characterized using XRD, SEM, and N2 adsorption-desorption, and it was prepared via the impregnation method. The interaction between ZnO/ZSM-5 and methylene blue solutions over a period of 30 to 180 minutes was monitored using a UV-Vis spectrophotometer. The photocatalytic degradation of methylene blue followed first-order rate kinetics. The Langmuir-Hinshelwood (L-H) kinetic analysis revealed that the photocatalytic reaction constant (kc) was 4.207 L.mg-1. menit-1, and the Langmuir-Hinshelwood constant (K) was 261.509 L.mg-1.
Calcinated Ferronickel Slag as Catalyst In Biodiesel Synthesis from Cooking Oil Sitanggang, Boy Chandra; Aras, Neny Rasnyanti M.
Indonesian Journal of Chemical Research Vol 11 No 3 (2024): Edition for January 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.11-boy

Abstract

Ferronickel slag is a byproduct of the nickel ore smelter factory that is typically dumped in an open area and is detrimental for the environment. The research objectives are to examine ferronickel slag potential as catalyst in producing biodiesel. Ferronickel slag was prepared by milling followed by sieving 200 meshes and calcinated at 900 ºC. The next step was to evaluate the calcinated slag using XRF, which revealed that the major components were, in order, Si (49.47%), Fe (36.09%), Ca (7.12%), Cr (3.01%), and Mn (2.28%). Slag that has been calcined and utilized in the transesterification of cooking oil as catalyst in three necked flask with oil to methanol ratio is 1:9, reaction times (1, 2, 3 hours) and temperatures (70, 90, 110 oC). Then, the product were tested for water content, density, viscosity, acid number, free fatty acids, total glycerol, percent of methyl esters according to SNI 7182-2015. FTIR showed the presence of peaks at 1743.65 and 1157.29 corresponding to C=O and O-CH3 functional groups.
Synthesis of Biodiesel from Refined Waste Cooking Oil with Active Natural Zeolite Santoso, Aman; Sumari, Sumari; Asrori, Muhammad Roy; Wele, Amonius Regino
Indonesian Journal of Chemical Research Vol 11 No 3 (2024): Edition for January 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.11-ama

Abstract

This research evaluates refining waste cooking oil with active natural zeolite, utilizes it for biodiesel synthesis, and characterizes the synthesized methyl ester. This experimental laboratory research was carried out: (1) activation of natural zeolite, (2) refining waste cooking oil with active natural zeolite, (3) determination of free fatty acid (FFA) content of the oil, (4) transesterification with KOH catalyst, (5) characterization of the synthesized methyl esters according to the SNI 7182:2015, and (6) identification of the methyl ester component by GC-MS. The results showed that the FFA content of the refined waste cooking oil using active natural zeolite with concentrations of 10%, 20%, and 30% per mass of oil were 2.97, 2.0, and 1.56%, respectively. The yield of methyl ester transesterified with various concentrations of KOH (0.8, 1.0, and 2% per mass of oil), respectively, were 80.13, 85.34, and 74.98%. The synthesized methyl ester resulted in the characteristics: 0.867 g/mL of density; 5.72 cSt of viscosity; 1.449 of refractive index; 1.46 g KOH/g of acid number; and 0.023% of water content. Identification of GC-MS obtained the synthesized methyl esters, which include: 46.10% of methyl hexadecanoic, 41.68% of methyl 9-octadecanoic, 6.42% of methyl octadecanoic, and 5.80% of methyl eicosanoic.
Antibacterial Activity of Malaleuca Leucadendron Linn Essential Oil from North Central Timor Against Escherichia coli and Staphylococus Aureus Kolo, Sefrinus M.D.; Mere, Janrigo Klaumegio; Klau, Emirensiana H.; Obenu, Noviana M.
Indonesian Journal of Chemical Research Vol 11 No 3 (2024): Edition for January 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.11-sef

Abstract

The eucalyptus plant (Melaleuca leucadendron Linn) is one of the essential oil production plants in the world. The plant has been widely used as an antiseptic and also for relieving colds, sore throat, and infections. This study aims to identify the whole essential oil compounds of this plant using GC-MS and test the antibacterial activity of the essential oil using the disc diffusion method. Based on the results of the GC-MS analysis of the essential oil content obtained by steam distillation and antibacterial test using discs diffusion method to Escherichia coli and Staphylococcus aureus, yielded 81 compound peaks with antibacterial activity analysis results classified as relatively very strong at 5 different concentrations. The results of the best antibacterial activity test were indicated by the diameter of the inhibition zone 26.42 ± 0.97 mm for Escherichia coli while Staphylococcus aureus 23.43 ± 2.09 mm at a concentration of 100%. The study of antibacterial compounds based on the 81-peak GC-MS analysis found that 8 compounds have been reported as antibacterial. These compounds belong to the terpenes group with total percentages of eucalyptol 20.97 %, terpineol 11.74 %, β-pinene 6.24%, 3-carene 1.95%, caryophyllene 4.96 %, (z)-geraniol 0.10%, farnesol 0.10%, and eugenol 0.18% respectively

Page 24 of 32 | Total Record : 314

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