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Assyifa Junitasari
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al Kimiya : Jurnal Ilmu Kimia dan Terapan
Published by Universitas Islam Negeri Sunan Gunung Djati Bandung
ISSN : 24071897     EISSN : 24071927     DOI : http://doi.org/10.15575/ak
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry
The scope of al Kimiya Jurnal Ilmu Kimia dan Terapan s publication included general studies and special studies The general studies are pure chemistry in general and in specific fields as follows Study of inorganic organic and biochemical substances materials that have traditionally been successively entered into studies of inorganic chemistry organic chemistry and biochemistry. Some examples of specific topics from the study of these substances are bioanorganic bioorganic organometallic heterogeneous catalysts transition metal chemistry and coordination chemistry (complex) metabolism enzymology natural material chemistry and solids. Study of the physical and chemical properties of matter and their changes that have traditionally entered into the study of physical chemistry. Some examples of specific topics from this study are reaction kinetics and mechanisms surface chemistry polymers dyes, thermo dynamics chemistry theoretical chemistry and computation membrane catalysis radiochemistry electrochemistry photochemistry and spectroscopy. Experimental studies and chemical instrumentation that have traditionally entered into analytic chemistry studies. Some examples of specific topics from this study are spectroscopy microscopy and chromatography. Specific studies that can be raised in the publication of al-Kimiya in general are as follows Study of applied chemistry in the field of food. Some examples of specific topics from this study are proteins lipids carbohydrates vitamins minerals enzymes additives food coloring agents and food chemical technologies related to these topics. Study of applied chemistry in the energy field. Some examples of specific topics from this study are photochemistry cell chemistry fuel biomass petroleum and natural gas fuels renewable chemical energy sources and chemical energy conversion Study of applied chemistry in the field of environment. Some examples of specific topics from this study are soil chemistry aquatic chemistry atmospheric chemistry green chemistry toxicology and water treatment. Pure chemistry studies as well as applied in the problem of local wisdom. This study was inspired by the lack of habits traditions in local tribe customs or culture related to the use of substances from nature. Back to Nature can be the ultimate term to describe the contribution of culture to modern traditions that are more prudent in managing nature. Pure and applied chemistry studies to understand the universality values of Islam rahmatan lil alamin.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 6 Documents
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Search results for , issue "Vol 9, No 2 (2022): al Kimiya: Jurnal Ilmu Kimia dan Terapan" : 6 Documents clear
Propellant Development Using Local Sources of Nitrate Compounds Suharnoko Suharnoko; Chairussani Abbas Sopamena; Jasmansyah Jasmansyah; Anceu Murniati; Arie Hardian
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 9, No 2 (2022): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v9i2.20878

Abstract

Currently in Indonesia, propellant research is still rarely carried out due to bureaucratic and budgetary problems. This study aimed to determine the optimum composition of propellant using local sources of nitrate compounds based on its combustion heat value and to study the effect of the composition on its combustion heat value. The propellant composition used in this study consists of oxidizing agents (local nitrate compounds), fuel (Aluminium), binder (polyester-based resin), and additive (catalyst). A bomb calorimetry method (ASTM D5865/5865-19) was used to determine the combustion heat value of the propellant. The results showed that the heat of combustion of local content nitrate compound-based propellants was high (> 1500 cal/g), adding binder to the propellant composition increases the heat of combustion. Ammonium nitrate-based propellant has the highest heat of combustion value of 3,788 cal/g. The optimum binder composition in the propellant was 33% (w/w). Based on this study, local source of nitrate compounds has potential to be used for development of propellant, especially in Indonesia. Therefore, it can encourage rocket research in Indonesia as a capital for the development of defense equipment to be less expensive.
Batch Adsorption of Pb(II) Batch Using Humic Acid from Goat Dung Malikhatul Hidayah; Kustomo Kustomo; Anfi'na Ilma Yunita
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 9, No 2 (2022): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v9i2.19735

Abstract

This research focuses on the batch adsorption process, then looks for kinetic models and Freundlich model adsorption isotherms. In the process of adsorbing the heavy metal Pb, humic acid from goat dung has the potential to be employed as a promising adsorbent since it offers benefits, including being economical, being able to work accurately, quickly, sensitively, selectively, and helping to maintain public health. Parameters for testing humic acid from goat dung as an adsorbent for heavy metal Pb were determined by optimizing pH test variations, contact time, and concentration of Pb solution. Humic acid from goat manure could work optimally to absorb heavy metal Pb at pH 5, contact time 30 minutes, and metal concentration Pb 20 ppm with an adsorption capacity of 19.784 mg/g. Data modeling revealed that the adsorption process followed a pseudo-second-order kinetics model with the acquisition value of R² = 0.9595 and the Freundlich isotherm with the acquisition value of R² = 0.9166.
Antibacterial and Anticancer Activities of Acetone Extract Caesalpinia sappan L. Tita Juwitaningsih; Nurhadi Syahputra; Eddiyanto Eddiyanto; Neneng Windayani; Yaya Rukayadi
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 9, No 2 (2022): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v9i2.20966

Abstract

Sappan wood (Caesalpinia sappan L.) from the Caesalpiniaceae family is a plant that has been widely used as a health drink such as herbal medicine, in Sundanese called jamu or wedang secang. The drink containing C.sappan extract is traditionally believed to have the ability to reduce symptoms of colds, coughs, canker sores, and rheumatism, overcome fatigue and improve blood circulation. In this research, wood extract of C. sappan L in acetone solvent tested as antibacterial and anticancer. The antibacterial test was performed on the bacteria Streptococcus mutans ATCC 35668 and Enterococcus. faecalis ATCC 49619 with paper disc diffusion method. The microdilution method was used to determine the Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC). The anticancer test is carried out in vitro on A549 lung cancer cells using the MTT method assay. The results showed that the wood extract of C. sappan L in acetone has weak antibacterial activity against S. mutans ATCC 35668 and E. faecalis ATCC 49619. The MIC is 1250 ug/mL, respectively. Aceton wood extract of C. sappan L. showed moderate anticancer activity with IC50 value 90,01µg/mL. Thus, the extract of C. sappan L. in acetone has the potential as a source of anticancer compounds.
Treatment of Eceng Gondok Waste into Electrical Based on Microbial Fuel Cell Hijrah Amaliah Azis; Ardiansa Ardiansa; Riki Kusuma Purnama
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 9, No 2 (2022): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v9i2.20974

Abstract

The increasing consumption of electrical energy and still dependent on non-renewable energy has encouraged the implementation of effective, efficient, and environmentally friendly technologies to produce electrical energy. Microbial Fuel Cell (MFC) is one of the alternative technologies that utilize microorganisms in converting chemical energy from organic compounds under anaerobic conditions to be converted into electrical energy.  The study was conducted to determine the potential of electrical energy generated from the treatment of eceng gondok waste (Eichhornia crassipes) with variations in the addition of buffer solutions and combinations of electrolyte solutions using the microorganism Saccharomyces cerevisiae through Microbial Fuel Cell technology. This study consists of three stages and methods, namely sample preparation, MFC media preparation, and analysis of pH, current, voltage, and power density. Measurement of the value of the maximum voltage, maximum current and power density is carried out every 3 hours for 27 hours for each treatment. The results were obtained as follows consecutively: firstly, for variations without the addition of buffers and electrolyte solutions are 0.25 volts; 0.08 mA; 13.05 mW/m2, secondly, with buffer and electrolyte solution KMnO4 0.2 M are 1.12 volts; 0.77 mA; 562.92 mW/m2, and thirdly, with buffer and K3Fe(CN)6 0.2 M are 0.47 volts; 0.48 mA; 147.26 mW/m2. Based on the results of the study, it was concluded that the most optimal variation in producing electrical energy was in the variation in the addition of a phosphate buffer and  0.2 M KMnO4 solution.  Eceng gondok waste has the potential to be used as a source of electrical energy.
Sunscreen Activity Determination on Hippobroma Longiflora Leaves Extracts Affected to Differences in Simplicia Treatments and Extraction Techniques Awaly Ilham Dewantoro; Selly Harnesa Putri; Efri Mardawati; Desy Nurliasari
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 9, No 2 (2022): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v9i2.20502

Abstract

Various weeds in paddy rice fields could be utilized as natural polyphenols sources, one of them was kitolod (Hippobroma longiflora (L.) G.Don). Kitolod was widely utilized as traditional medicine by several community groups because of its polyphenols content. Recent trends showed kitolod could be valorized as additive matters in sunscreen products. Polyphenols content, especially flavonoids were able to absorb dangerous spectrum in sunray radiation and it is related to sunscreen activity. This study aimed to evaluate the differences in simplicia treatments and extraction techniques towards total polyphenols content and sunscreen activity on kitolod leaf extracts. Solvent-cold extraction techniques were deployed in this study that consist of water infusion and ethanolic maceration for 24 hours at ambient temperature. Extracts were analyzed by spectrophotometric measurement to determine total phenolics content (TPC), total flavonoids content (TFC), and sunscreen activity by deploying Folin-Ciocalteu assay, AlCl3 colorimetric assay, and Mansur approached assay, respectively. Dry kitolod leaves were extracted by ethanolic maceration techniques provided high yields (15.5±0.3%), high TPC (17.9±0.3 mg GAE/g of solids), high TFC (25.9±0.4 mg QE/g of solids), and moderate sunscreen activity (SPF 11.0±0.1). The results indicated kitolod could be valorized as natural polyphenols sources and additive matters in any cosmetical sunscreen products.
The Effect of Variations of Hydrothermal Temperatures on Ex-Situ Hydroxyapatite/Al2O3 Doping Process from Papai Shrimp (Acetes erythraeus) Restina Bemis; Ratih Dyah Puspitasari; Heriyanti Heriyanti; Rahmi Rahmi; Gessy Tri Priyanti
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 9, No 2 (2022): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v9i2.20520

Abstract

Hydroxyapatite (HA) is an alloplastic material that is commonly used as a substitute for bone grafts or bone grafts because it has bioactive properties, namely osteoconduction. This study aims to improve or develop the function of hydroxyapatite to become a strong and resilient biological device that can withstand loads for appropriate functions such as bone implants. Therefore, it is necessary to modify the structure, among others, by the reinforcement process (composite formation) with other materials.The doping of hydroxyapatite/Al2O3 in this study was carried out using the hydrothermal method. The hydrothermal method is one of the hydroxyapatite synthesis methods carried out at high pressure and temperature to achieve equilibrium. The material used in this study was papai shrimp as a source of calcium. The temperature has an effect in this study where the higher the doping temperature used, the higher the degree of crystallinity, particle size homogeneity, and porosity value. From the doping results, it is known that a temperature of 300°C produces a degree of crystallinity of 54.32% and a crystal size of 3.75 nm with a porosity value of 99.38%. This result is much better than the undoped hydroxyapatite in the previous study.

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