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Al-Kimia

al-kimia
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Published by Universitas Islam Negeri Alauddin Makassar

ISSN : 23022736 EISSN : - DOI : -

Core Subject : Science,

Chemistry

Al-Kimia is a journal of chemistry that published by Department of Chemistry, Faculty of Science and Technology UIN Alauddin Makassar. The journal is published twice a year on January-June and July-December. This journal encompasses original research articles in all aspects of chemistry and related area. The journal, which was firstly published in July 2013, is a forum for communication of research results, review the results of research, methodologies and new approaches in research related to chemistry in Indonesia.

Arjuna Subject : -

Articles 238 Documents

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Development of Novel Alumina by Solid-State Reaction for 99Mo/99mTc Adsorbent Material Miftakul Munir; Enny Lestari; Hambali Hambali; Kadarisman Kadarisman; Marlina Marlina
Al-Kimia Vol 7 No 2 (2019): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Technetium-99m (99mTc), a daughter radionuclide of molybdenum-99 (99Mo), is the most widely used radiodiagnostic agent due to its ideal characteristics. The separation of this radionuclide from 99Mo is commonly performed using alumina. However, a new production method of this radionuclide, which employs a low specific activity 99Mo, makes alumina no longer suitable as separation material. This study aims to develop novel alumina using a facile solid-state reaction for 99Mo/99mTc generator system. The SS-alumina was synthesized from aluminium nitrate nonahydrate and ammonium bicarbonate without solvent. The resulted SS-alumina was then analyzed by FTIR and BET method. 99Mo adsorption and 99mTc releasing study on a series of pH were also performed. FTIR study revealed that the resulting material was Al2O3 with a surface area of 237.65 m2/g. The adsorption capacity, 99mTc yield, 99Mo breakthrough, and alumina breakthrough were 76.06 mg Mo/g alumina, 80.31%, 56.5 µCi/mCi 99mTc, and less than 5 mg/mL, respectively. The elution profile shows a high activity of 99mTc in 2nd and 3rd fraction. It is concluded that the SS-alumina shows good performance as adsorbent material for separation of a 99Mo/99mTc and further work is now underway.

Gum Benzoin (Styrax benzoin) as Antibacterial against Staphylococcus aureus Asih Gayatri; Eti Rohaeti; Irmanida Batubara
Al-Kimia Vol 7 No 2 (2019): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Gum benzoin (Styrax benzoin) is one of nontimber forest product classified into the resin group. The aim of the study was to determine the component from gum benzoin as an antibacterial against Staphylococcus aureus. Indonesian gum benzoin was obtained from North Sumatra and has antibacterial activity against S. aureus with the MIC (minimum inhibitory concentration) and MBC (minimum bactericidal concentrationo) values of its ethyl acetic extract of 1.00 mg/mL and 2.00 mg/mL, respectively. Thin layer chromatography (TLC) was used in purification of ethyl acetate extract of the gum benzoin. The active component was detected by TLC contact bioautography. The bands with Rf of 0.21, 0.77, and 0.87 had growth inhibition activity to the S. aureus. The active antibacterial band with Rf of 0.21 was isolated and it could be an alkaloid component.

Synthesis of Cellulose Acetate-Polystyrene Membrane Composites from Pineapple Peel Wastes for Methylene Blue Removal Irvan Maulana Firdaus; Febiyanto Febiyanto; Try Fitriany; Lely Zikri Zulhidayah; Dyah Ayu Septiarini; Oto Dwi Wibowo
Al-Kimia Vol 7 No 2 (2019): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

The cellulose acetate-polystyrene or CA-PS composite membrane from pineapple peel waste for methylene blue removal has been conducted. The steps were nata de pina preparation, cellulose acetylation process, preparation, and characterization of CA-PS composite membrane. The CA-PS composite membrane was characterized using Fourier Transform Infrared (FT-IR), Scanning Electron Microscopy (SEM), tensile and strain examination, respectively. The as-synthesized CA-PS composite membrane has the characteristic of rejection ability was about 29.96% with the pore size, membrane modulus, stress and strain were 1.9 μm, 12.48 MPa, 31.91 MPa, and 2.55, respectively. In this research, CA-PS composite membrane from pineapple peel waste was successfully removed the methylene blue dye even needs improvement to enhance its capability in rejection efficiency as same as membrane characteristics.

Identifikasi Komponen Minyak Atsiri Daging Buah Pala (Myristica Fraghans Houtt.) Asal Pulau Lemukutan dan Uji Aktivitas Antiinflamasi Menggunakan Metode Stabilisasi Menbran RBCs (Red Blood Cells) Guntur Guntur; Harlia Harlia; Ajuk Sapar
Al-Kimia Vol 7 No 2 (2019): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Nutmeg (Myristica fragrans Houtt) is a medicinal plant that produces essential oils and is often used as a flavoring of food and medicine. The process of extracting essential oils from the nutmeg fruit pulp using the steam-water distillation method. The yield of essential oil obtained at 0.07765%, with a pale yellow color, the distinctive smell of nutmeg oil with a refractive index of 1.485, and a specific gravity of 0.909 g / mL and soluble in ethanol. The results of GC-MS identification showed that the essential oil of nutmeg fruit flesh contains five components, the main compound is myristicin (18.44%), α-pinene (14.2%), limonene (9.37%), γ-terpinene (7.98%) and terpinolene (7.66%). Based on the test results of anti-inflammatory activity, the value of the percentage of red blood cell stability optimum mounting to 80.21% at a concentration of 10 ug / mL, where the standard aspirin has an activity of 72.26%. These results indicate that the meat nutmeg essential oil is potential as anti-inflammatory agents.

Modified CaO Catalyst from Golden Snail Shell (Pomacea canaliculata) for Transesterification Reaction of Used Cooking Oil Siti Rodiah; Desti Erviana; Fachtur Rahman; Anissa Widya Budaya
Al-Kimia Vol 8 No 1 (2020): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i1.12173

One of alkaline earth metal oxide is calcium oxide, CaO has more attention because it has high strength, low solubility in methanol, and can be synthesized from sources that are easy to obtain. One of the sources of CaO and showed its catalytic properties was the golden snail shell. In this study, synthesize ash golden snail shell modified with fly ash leached and non-leached as a source of silicate (SiO2) has been investigated. The CaO/fly ash catalyst was applied to the transesterification reaction of used cooking oil. There are three catalysts have synthesized, namely golden snail shell calcined (CK), 75% golden snail shell calcined modified by 25% fly ash (CKFA), and by 25% fly ash leached (CKFAL). Based on the results of characterization with spectrophotometer X-Ray Diffraction (XRD), golden snail shell calcined at 900 ˚C containing 93.94% Ca (OH)2. Modified CaO catalyst from golden snail shell and fly ash were active to convert used cooking oil become biodiesel.

Mechanism and inhibition efficiency of biomass Tetraselmis chuii sp. on carbon steel corrosion in the environment under the conditions of oil wells Yayan - Sunarya; Heli Siti H; Munawaroh Munawaroh; Gun Gun Gumilar
Al-Kimia Vol 8 No 1 (2020): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i1.7230

Corrosion control on petroleum pipe wells can only be done through the addition of corrosion inhibitors. In this study, the corrosion inhibitors studied were sourced from marine microorganisms, namely the type of microalgae Tetraselmis chuii sp. The aim to be achieved in this study was to determine the mechanism and efficiency of inhibition of the extraction of microalgae biomass in corrosion of carbon steel in an environment of petroleum conditions. To achieve this goal, a potentiodynamic polarization method (Tafel extrapolation) was used and the Electrochemistry Impedance Spectroscopy (EIS) method used the galvanostat-potentiostat device (Voltalab 40, PGZ 301). The results obtained from this study indicate that API 5L X65 carbon steel in the petroleum environment is very significantly corroded, caused by acidic media derived from acetic acid and dissolved CO2. The inhibition ability of the Tetraselmis chuii sp. Biomass extract. in line with the increasing extraction concentration reaching optimum at a concentration of 250 ppm with inhibition efficiency reaching 70%. The mechanism of inhibition takes place through the formation of a protective layer adsorbed on the surface of carbon steel. The protective membrane formed is uneven and tends to be porous.

Komparasi Bioplastik Berbasis Pati sagu (Genus Metroxxlen,SP) dengan Plastisizer Glyserol dari Minyak Jelantah Melalui Proses Esterifikasi Khairun Nisah
Al-Kimia Vol 8 No 1 (2020): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i1.10566

The results of Esterification of waste frying oil is used in this study as bioplastic plasticizers. Sago plate (Genus Metroxxlen, SP), as bioplastic matrix due to amylopectin content. This study intend to utilize waste frying oil and increase the benefits of sago as a bioplastic. The method of making bioplastics by heating 600 C. Characteristics are carried out based on the properties of mechanical properties (Tensile strength), morphology (organoleptic), functional groups (FT-IR), transparasi (UV-VIS), water resistance, and degradation. The composition made, from sago and glycerol (0.5: 1; 1: 1; 0.5: 2; 0.5: 3) produced the best bioplastic with sago composition and glycerol is 0.5: 3. Characteristics that It was observed in the form of elongation of 4.10%, tensile strength 7.08 Kgf / m2, water resistance 0.0037%, transparency of 0.086%, functional groups with absorption in the area of 2924.5 cm-1 which showed alkane compounds, namely streching CH in the area of 2850-3000 cm-1. Streching -O- ether is at 1639.05 cm-1, then the absorption at 3290.86 cm-1 is the -OH functional group absorption. Degradation on day 15 shows a greater decay yield of 34.68 mg. Surface morphology that is not smooth, due to the presence of pores and cracks, this situation is possible due to the lack of OH content in glycerol from used cooking oil.

Pengaruh Suhu Kalsinasi dan Waktu Kukus Terhadap Aktivasi Limbah Praktikum Isotherm Freundlich Di Laboratorium Kimia Analitik I Ketut Lasia; Ni Made Wiratini
Al-Kimia Vol 8 No 1 (2020): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i1.7635

This study aims to determine the effect of calcination temperature and steaming time on the activation of freundlich isotherm practicum waste (LPIF) in the Analytical Chemistry Laboratory. The LPIF was taken from the waste of the Physical Chemistry Practicum at the Analytical Chemistry Laboratory, Department of Chemistry, Ganesha University of Education. To achieve the research objectives, the LPIF was calcined at 165oC and 195oC, then steamed with 900 mL of distilled water at 400oC for 60 minutes and 45 minutes, respectively. The results of LPIF activation were characterized by absorption, increasing of absorption, FTIR spectrum, and SEM morphology. The results of the study showed that there were influences of calcination temperature and steaming time on LPIF in the Analytical Chemistry Laboratory. The best temperature of calcination and steaming time for activation of LPIF was calcination temperature of 195oC and steaming for 45 minutes.

Plastic Pyrolisis of Low Density Polyethylene (LDPE) Using Bleaching Earth (BE) Catalyst Become Liquid Fuel Sri Widya Astuti Abidin; Nurmalasari Nurmalasari; Sumiati Sumiati; Ayu Ramadani
Al-Kimia Vol 8 No 1 (2020): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i1.10750

This study aims to determine the effect of adding Bleaching Earth (BE) catalyst to the amount of liquid fraction by pyrolysis of Low Density Polyethylene (LDPE) and find out the concentration of gasoline and diesel fractions from plastic pyrolysis Low density polyethylene (LDPE). The method in this study is the pyrolysis method (heating without oxygen) and analysis of the liquid fraction resulting from pyrolysis using GCMS (Gas Chromatrographic Mass Spectrometry). In this study, the effect of adding Bleaching Earth (BE) catalyst on Low Densiry Polyethylene plastic pyrolysis is the more catalyst used, the lower the quantity of liquid fraction. Based on GCMS analysis on plastic pyrolysis of Low Density Polyethylene (LDPE) from various variations of Bleaching Earth (BE) catalysts used the optimum concentration was obtained by adding 2.5 g, 5 g, and 7.5 g Bleaching Earth (BE) catalysts to produce fractions higher diesel (C13-C20), 37.04%, 31.04% and 35.59% respectively

Pemodelan Homologi Komparatif Struktur 3d Protein dalam Desain dan Pengembangan Obat Fredy Z Saudale
Al-Kimia Vol 8 No 1 (2020): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i1.9463

One of the strategies applied in the initial steps of drug design and discovery is by utilizing the availability of 3D protein structures. However, most of functional protein structures have not been fully obtained experimentally to date. This is due to the difficulty of procedures, the high cost and the length of time required from structural biology experiments such as X-ray crystallography. Comparative homology modeling is a computational method that is proven to be accurate in predicting the structure of 3D target proteins with a ratio of 30% similarity to the arrangement of amino acids in the structure of the template proteins. This review attempts to explain comparative homology modeling methods such as MODELLER, PHYRE2, SWISS-MODEL, its iterative steps in predicting and building 3D protein target models, its evaluation and validation of protein models as well as the examples of their application in drug design and development targeting GPCR proteins, Zika virus RNA polymerase and HIV protease. With this, comparative homology modeling can be very useful to accelerate research on drug design and development in dealing with diseases and health problems that still exist in the society.

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