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I Wayan Sutapa
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INDONESIA
Chemistry Indonesian Journal of Chemical Research
  • Indonesian Journal of Chemical Research (Indones.
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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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Reaction Stability Test of Hexavalent Chromium Complex with 1,5-Diphenylcarbazide in Analysis using UV Visible Spectrophotometer Warmiati, Warmiati; Wijayanti, Wijayanti
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-war

Abstract

A reaction stability test of hexavalent chromium complex with 1,5-diphenyl carbazide in analysis using a UV Visible Spectrophotometer has been done in this study. This study aims to find out the colored complex stability for the reaction of chromium hexavalent and diphenyl carbazide in the analysis of hexavalent chromium using a UV Vis spectrophotometer in terms of time. The sample was measured in 540 nm of wavelength with 10, 30, 60, 90, 120, and 180-minute time intervals. Each interval was carried out with two times replications. There were no significant differences in the colored complex until the 180-minute time interval, and the measurement of Cr(VI) concentration showed similar results. This analysis exhibits a level of precision and accuracy, evident from the RPD values below 10 % and the recovery values falling within the range of 90 – 110 %. It means that the reaction of hexavalent chromium complex with 1,5-diphenyl carbazide in analysis using a UV Visible Spectrophotometer is stable.
Effect on NOx Abatement Performance of Metallic and Bimetallic (Copper and Platinum) Photodeposition onto TiO2 Anatase Ichsan, Chairul; Febriani, Widya
Indonesian Journal of Chemical Research Vol 12 No 1 (2024): Edition for May 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-ich

Abstract

To enhance the TiO2 anatase's ability to degrade nitrogen oxides (NOx), this study seeks to optimize the photocatalytic activity, selectivity, and DeNOx index of anatase TiO2 nanoparticles through surface modification using metallic and bimetallic (Cu dan Pt) photodeposition. The samples' photocatalytic performance is assessed by NOx abatement measurement, while their characteristics are analyzed using UV-Vis diffuse reflectance and an X-ray diffractometer. According to the measurement, S6 (0.05% Pt/TiO2) has a photonic efficiency of 0.17 for the degradation of NOx, which is 2.15 times higher than bare TiO2. The DeNOx index, which combines selectivity and photonic efficiency, suggests that S9 (0.05% Pt + 0.1% Cu/TiO2) is the most effective sample in the visible light region, with a value of 0.01. Under broadband illumination, S6 has a DeNOx index of 0.13, which is the highest among all samples, while S9 has a moderate-level DeNOx index of 0.019. All samples have a higher DeNOx index than the bare anatase TiO2 nanoparticles. Bimetallic samples exhibit the best performance under visible light, whereas Pt-modified TiO2 anatase performs best in the broadband light range.
Radioisotope 32P for Keloid Therapy: A Review Rahman, Wira Y; Budiawan, Budiawan; Suseno, Heny
Indonesian Journal of Chemical Research Vol 12 No 2 (2024): Edition for September 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-wir

Abstract

Keloids are skin disorders resulting from an abnormal wound healing response, often leading to excessive scar tissue growth. Keloids can be itchy, painful, and aesthetically disturbing. Keloid therapy varies, but until now, there is no standard method that is effective due to different patient responses. Racial, environmental, and genetic variables influence keloids. Various therapeutic techniques, such as surgery, cryotherapy, corticosteroid injections, laser light, and radiotherapy, have been used to treat keloids, but each has advantages and disadvantages. However, these treatments have limitations, such as high recurrence rates and patient discomfort. The application of radioisotope therapy, specifically using 32P, has emerged as a promising alternative. Radioisotope 32P emits β-particles, effectively inhibiting keloid cell growth by causing DNA damage and reducing collagen production. Studies show that 32P therapy significantly reduces keloid size and recurrence rates while causing minimal patient discomfort. Although there are potential risks, such as damage to surrounding healthy tissue, 32P therapy provides a practical and non-invasive option for keloid management. However, more research is required to fully understand this method’s effectiveness, safety, and long-term impact on keloid therapy, optimize treatment protocols, and minimize side effects.
The Implementation of FT-IR Method for Compound Detection in Eco-Enzyme Applied as Hydrogel Patch SetiyaNingrum, Diah Ayu; Nutfindiani, Elvi Diah; Margaretha, Zahra; Efendi, Meilisa Rusdiana Surya
Indonesian Journal of Chemical Research Vol 12 No 1 (2024): Edition for May 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-set

Abstract

Potential organic waste includes fruit and vegetable peels which are used as eco-enzyme which are rich in benefits in several fields, one of which is in the health sector, namely hydrogel patch. The aim of this research is to identify the compound content in eco-enzyme and understand the impact of hydrogel patch on the process. healing open wounds. The research method used is the FT-IR method to detect the compound content of eco-enzyme which are applied as hydrogel patchs to heal open wounds in mice. The conclusion in this research is that the presence of flavonoid, alkaloid and tannin compounds in eco-enzyme has been identified and shows that the 5 treatments on eco-enzyme hydrogel patch have concentrations of 25%, 35% and 45% which are stable or 100% recovery, because the results One-Way ANOVA analysis in pre-clinical hydrogel patchs on mice in open wound healing showed a sig value of p = 0.283 > α (0.05). The analysis results show that the functional group (OH) appears at an absorption of 3293.56 cm-1, at an absorption of 2174.49 cm-1 it shows the presence of an Alkyl Nitrile functional group, the Amide functional group (CN) is found at an absorption of 1636.34 cm-1.
Comparative Analysis of Coal Quality across Various Coal Basins in Sumatra: A Case Study of Calorific Value, Moisture Content, and Sulfur Content Hanum, Farrah Hanum; Hapsauqi, Iqbal; Jamilatun, Siti; Nirmalasari, Jiran
Indonesian Journal of Chemical Research Vol 12 No 1 (2024): Edition for May 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-han

Abstract

Indonesia and other countries have used coal as their main energy source for many years. Due to variances in coal formation, maturity, and geological history, each basin may have a range in coal quality. It houses unique coal basins—South Sumatra, Central Sumatra, Riau, and Aceh—each marked by distinct geological features. Variations in coal formation, maturity, and geological history contribute to quality differences. The analysis of coal quality plays a crucial role in determining its suitability for various applications, including power generation, industrial processes, and export purposes. This study focuses on the coal characteristics of Riau (Coal A), Bengkulu (Coal B), South Sumatra (Coal C), and Jambi (Coal D), evaluating parameters such as calorific value, moisture content, and sulfur content. Employing ASTM-based analysis methods, results reveal that Coal D exhibits the lowest sulfur but has a diminished calorific value, while Coal A boasts a higher calorific value but the highest total sulfur content. Understanding such distinctions is crucial for determining coal's suitability for diverse applications like power generation, industrial processes, and exports. Hopefully, this research could help in estimating the economic potential of these basins, identifying areas with higher-quality coal, and planning future exploration and development activities.
Comparative study of Trigonella foenum-graecum L. varieties in the Middle East by using protein pattern and seed morphology El-Shabasy, Ahmed
Indonesian Journal of Chemical Research Vol 12 No 1 (2024): Edition for May 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-sha

Abstract

This study illustrates the situation of the relation between different varieties of Trigonella foenum-graecum L. not in the same one country but in different countries in the Middle East area; Algeria, Egypt, Ethiopia, India, Iran, Sudan, Tunisia, Turkey and Yemen. This comparative study explained the origin of the studied plant species and the evolutionary trends by using protein pattern and seed morphology showing the ancestral origin arisen upper Middle East region. This study explored the global changes and impacts on variety distribution.
Structural and Molecular Dynamics Investigation of Bacterial and Fungal Xylanases Komari, Noer; Sanjaya, Rahmat Eko; Putra, Andifa Anugerah; Putri, Amaris Nathania Hanindia; Febriyanti, Nur Fatma
Indonesian Journal of Chemical Research Vol 12 No 1 (2024): Edition for May 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-kom

Abstract

Xylanase is a type of enzyme that hydrolyzed of β-1,4 glycosidic bonds in xylan, breaking it down into its constituent monomers. Xylanolytic enzymes are pivotal in processes such as bio-bleaching of pulp, textile manufacturing, and the recycling of waste paper. Successful bioconversion of xylan or lignocellulose relies on the collaborative action of various xylanolytic enzymes, including endo-xylanase, β-xylosidase, and other accessory enzymes. Docking simulations using Auto Dock 4.2 were conducted to analyze the interaction between ligands and xylanase, utilizing PDB 1B3V and 1FCE. Ligand interaction with xylanase was further investigated through molecular dynamics. The xylanase from Penicillium simplicissimum (PDB 1B3V) exhibited comparable affinities for α-D-xylopyranose and β-D-xylopyranose. In contrast, the xylanase from Clostridium cellulolyticum (PDB 1FCE) demonstrated a stronger affinity for β-D-glucopyranose than for 4-thiouridine. Molecular dynamic investigations indicated the stability of both structures against the tested ligands. These findings provide a foundation for potential experimental validations and the application of molecular mechanics techniques. Such approaches could unveil the detailed catalytic mechanism and bolster the industrial efficacy of the enzyme.
Cellulose From Water Hyacinth As Acrylamide Adsorbent In Frying Oil Wulandari, Winda Trisna; Sugiharti, Mulya Tri; Wardani, Gatut Ari
Indonesian Journal of Chemical Research Vol 12 No 1 (2024): Edition for May 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-wul

Abstract

Cooking oil frequently used by the community is palm oil. When heated repeatedly, this oil can produce acrolein, a compound that contributes to the formation of acrylamide. Water Hyacinth cellulose contains -OH groups capable of binding to acrylamide. The purpose of this study was to determine the effect of adding Water Hyacinth cellulose as an adsorbent and to evaluate the impact of soaking time and cellulose weight on acrylamide levels. The analysis was conducted using HPLC, with a mobile phase consisting of methanol and 0.1% phosphoric in a ratio of 5:95, at a flow rate of 1mL/min; the volume of the injected sample was 20 µL. Acrylamide in oil was identified at a retention time of 4.700 minutes. The regression equation obtained from the acrylamide calibration curve is y=229.52 x + 10.472 with a correlation coefficient (R2) of 0.9988. This study concluded that soaking for 24 hours can reduce acrylamide levels by 69.13%, and using 6 grams of cellulose can reduce acrylamide levels by 75.15%.
Synthesis of Zeolite-A From Oil Palm Shell Ash for Ferrous Metal Adsorption in Borehole Water Koloay, Fricha Febriani Paula; Sunarti, Sunarti; Manuhutu, Julita Beatrik
Indonesian Journal of Chemical Research Vol 12 No 2 (2024): Edition for September 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-fri

Abstract

Research has been conducted to adsorb Fe (III) ions in borehole water from Haruru Village, Central Maluku District, and artificial wastewater using A-type zeolite synthesized from oil palm shell ash. The oil palm shell ash was chemically activated by washing with 2 M HCl, serving as a source of SiO2. The synthesized zeolite A underwent characterization using X-ray diffraction (XRD) to determine its crystallinity. Batch adsorption of Fe (III) ions using zeolite A in borehole water and artificial wastewater was performed, involving variations in contact time and adsorbed iron concentration, and was analyzed using atomic absorption spectroscopy. The XRD analysis results indicated that the peaks of zeolite A were more pronounced at a NaOH mass of 93.75 grams, totaling ten peaks. The analysis of the initial concentration of Fe (III) ions in borehole water was 1.2151 ppm, while in artificial wastewater, it was 2.00 ppm. The optimum capacity and efficiency of zeolite A for Fe (III) ions in borehole water from Haruru Village were observed at a contact time of 40 minutes, with a capacity value of 0.1558 mg/g and an efficiency of 10.26%.
Bioaccumulation of Lead Metal (Pb) by Mangrove Plants (Rhizopora apiculata) in the Waters of Poka Village, Inner Bay of Ambon Mariwy, Abraham; Dulanlebit, Yeanchon H; Ode, A.
Indonesian Journal of Chemical Research Vol 12 No 1 (2024): Edition for May 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-mar

Abstract

This research aims to study the extent of bioaccumulation of the heavy metal Pb by mangrove plants (Rhizopora apiculata) in the waters of Poka Village, Ambon Bay. Mangrove plants were chosen because they can naturally accumulate heavy metals around their roots. In this study, sediment grains were measured using a Sieve Shaker, the content of Pb metal in sediment and parts of mangrove plants was determined using AAS, while the bioaccumulation value of Lead metal (Pb) by mangrove plants was calculated using the BCF and TF formulas. The results showed that the particle size in gravel ranged between 0.00-0.13%, sand 20.44-66.35%, and mud 33.65-79.56%. Lead (Pb) levels in Poka Village waters in sediment ranged from 10,925-16,925 mg/kg, roots ranged from 0.5-21.35 mg/kg, and leaves ranged from 0-4,675 mg/kg. Meanwhile, the BCF value at sampling point 1 = 0.03, sampling point 2 = 1.40 and sampling point 3 = 0.56, the TF value at sampling point 1 = 7.8, sampling point 2 = 0.03 and sampling point 3 = 0.09. This shows that mangrove plants function as phytoextraction and can be used as phytoremediation agents to accumulate the heavy metal lead (Pd) from waters.

Page 26 of 32 | Total Record : 314

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