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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.

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Articles 11 Documents

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Search results for , issue "Vol 7 No 2 (2019): DECEMBER" : 11 Documents clear

Potensi Instrumen FTIR dan GC-MS dalam Mengkarakterisasi dan Membedakan Gelatin Lemak Ayam, Itik dan Babi St Chadijah; Maswati Baharuddin; Firnanelty Firnanelty
Al-Kimia Vol 7 No 2 (2019): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Penelitian ini bertujuan mengkarakterisasi gelatin tulang kaki ayam, kulit itik dan kulit babi serta membedakan profil asam lemak dari ketiga material tersebut. Metode yang digunakan: proses curing dan hidrolisis dengan variasi suhu. Hasil yang diperoleh dikarakteisasi dengan FTIR dan GC-MS. Hasil yang diperoleh menunjukkan gelatin yang dihasilkan dari tulang kaki ayam, kulit babi dan kulit itik pada suhu 80ᵒC masing-masing 2.02%; 9.33% dan 1.1%. Kadar air dari tulang kaki ayam, kulit babi, dan kulit itik yaitu 11.19%; 7.73% dan 7.7%. kadar air tersebut telah memenuhi standar kadar air SNI yaitu maksimum 16%. Hasil karakterisasi gelatin dengan FTIR menunjukkan serapan gugus fungsi yang spesifik. Pada spektrum FTIR gelatin kulit babi terdapat gugus N−H dan O−H (3433,79 cm-1), CH2 (2931,01 cm-1), C═O (1655,21 cm-1), N−H dan C-N (1544,38 cm-1), N−H (1237,39 cm-1) dan gugus C−O (1079,69 cm-1). Peak yang dihasilkan kulit babi lebih sedikit. Sedangkan GC-MS mampu membedakan komponen asam lemak babi dengan asam lemak ayam dan itik. Diperoleh hasil bahwa komposisi asam lemak utama pada lemak babi adalah asam oleat C18:1 (58,79%), stearat C18:0 (11,66%) dan palmitat C16:0 (11,44%). Komponen asam lemak utama pada lemak babi murni secara keseluruhan memiliki asam arakidonat dan asam eikosenat yang tidak terdeteksi pada lemak lain.

Extraction, Isolation, Characterisation and Antioxidant Activity Assay of Catechin Gambir (Uncaria gambir (Hunter). Roxb Edin Ningsih; Sri Rahayuningsih
Al-Kimia Vol 7 No 2 (2019): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Catechins are one of polyphenol compounds which reported have antioxidant properties. This study aims to extraction, isolation, characterization, and determine the antioxidant activity of catechin compounds from gambier powder(Uncaria gambir (Hunter). The extraction method used was maceration extraction with three types of solvents (70% ethanol, 70% methanol, and ethyl acetate). The process of purifying catechins is carried out with water, ethyl acetat, and n-hexane. Catechins were characterized by FTIR (Fourier Transform Infra Red) and UV-Vis spectrophotometer and tested for antioxidant activity using the DPPH (2.2 Difenyl -1-Pikrilhidrazil) method. The results showed that the extracted gambier using 70% ethanol solvent resulted in more catechins (51.20 g) than the 70% methanol solvent (40.35 g) and ethyl acetate (16.40 g). Characterization of catechin using UV-Vis spectrophotometer showed that purity content of catechins obtained from the extract ethanol 70% had purity 70.76%, methanol 70% 70.86%, and ethyl acetate 70.35%. Analysis using FTIR showed catechin has functional groups such as hydroxy (-OH), vibration C = C alkene, C-H, CH2 and C-O, so that the compound isolated has the basic structure of the catechin. The result of antioxidant activity from showed IC50 value are 2.72 ppm; 3.04 ppm and 3.06 ppm for extract catechin of etanol 70%, methanol 70% and ethyl acetate, so that can be said that catechins have antioxidant activity levels in a very strong category.

Kajian Kinetika Pengaruh Lama Penyimpanan Terhadap Kadar Vitamin C Pada Buah Apel Malang (Malus Sylvestris) Anjar Purba Asmara; Hanik Khuriana Amungkasi
Al-Kimia Vol 7 No 2 (2019): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

An analysis for determining kinetics of effect of varied shelf-life time to the level of vitamin C in Malus sylvestris fruits has been conducted. It has used fresh apple Malang (M. sylvestris) from Batu (East Java) at their harvest time with the same size and color as the subject of the research. Therefore, the fruits were stored in room temperature and kept away from direct sunlight for 0, 1, 2, and 3 days. The fruits were extracted by using a juice blending technique with aquadest as the solvent. An iodimetric titration has been used to determine the effect of the varied storage time to the level of vitamin C in the samples. The result shows that the average value of vitamin C level in M. sylvestris stored in 0, 1, 2, and 3 days as much as 2.3904 mg/50g; 2.1073 mg/50g; 2.06695 mg/50g; and 1.9860 mg/50g, respectively. Statistic analysis of ANAVA-A and t-test confirms that there are significant differences between the level of vitamin C of M. sylvestris stored in 0, 1, 2, and 3 days. The conclusion about the kinetics of ascorbic acid degradation of M. sylvestris at 27 0C states three expressions as following as: the reaction is a second order reaction, the constants of reaction rate is 2.65 x 10-2 L(mol.days)-1, the half life is 15.786 days, and kinetics model for the reaction is C = (0.0265t + 1/C0)-1.

Synthesis and Characterization of UiO-66 as a Paracetamol Absorption Material Fery Eko Pujiono; Try Ana Mulyati
Al-Kimia Vol 7 No 2 (2019): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

UiO-66 synthesis has been carried out by dissolving 0.53 grams of zirconium tetrachloride (ZrCl4) and 0.34 grams of Benzene-1,4-dicarboxylic Acid (H2BDC) in 30 mL Dimethylformamide (DMF). The solution is then distilled for 30 minutes and then heated in an oven at 140 ° C for 6 hours. The UiO-66 material produced was then characterized by an X-Ray Diffractometer (XRD) and Fourier Transform Infrared (FTIR). The results showed that the UiO-66 was successfully synthesized which supported the XRD results at 2θ 7.3o, 8.49o and 25.8o which were the peak characteristics of UiO-66. In addition, the FTIR results show a peak of around 1500 cm-1 showing vibrations of C = C on the benzene ring and a peak of about 1390 cm-1 indicating streching of O-C-O produced from the ligand. The peaks are around 750, and 660 cm-1 which indicates the presence of C-H vibrations from the ligand. UiO-66 was also approved as the adsorption agent of paracetamol which was approved with the highest adsorption of paracetamol at 72 hours immersion time which was 97.03%.

Studi In Silico: Prediksi Potensi 6-shogaol dalam Zingiber officinale sebagai Inhibitor JNK Sri Sulystyaningsih Natalia Daeng Tiring; Yohanes Bare; Andri Maulidi; Mansur S; Fitra Arya Dwi Nugraha
Al-Kimia Vol 7 No 2 (2019): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Type 2 Diabetes Mellitus (T2DM) is a metabolic disease characterized by hyperglycemia and insulin resistance. T2DM therapy against c-Jun N-terminal kinase (JNK) is one of the recovery solutions using bioactive compounds from ginger. 6-shogaol is bioactive compounds of ginger that has antioxidant properties. The purpose of this study is to analyze the potential of 6-shogaol as a JNK inhibitor. JNK protein (ID: 464Y) was obtained from Protein Data Bank (PDB) through 6-shogaol ligand (CID: 5281794) obtained from the PubChem database. Protein docking protein and ligand use Hex 8.0.0 software while visualization and analysis using Discovery Studio client 4.0. The results showed that 6-shogaol was predicted to have potential as a JNK inhibitor. Proving this by finding five amino acid residues (TRY223, LEU210, THR103 ALA214, ARG107) with an energy of -236.29cal/mol. We found the type of hydrogen bonds and the van der waals forces formed. The interaction of ligand and protein successfully inactivates JNK and stops pancreatic β cell dysfunction. 6-shogaol has pharmacological properties as a JNK,T2DM.

Pengaruh Konsentrasi Tembaga dan Rapat Arus terhadap Morfologi Endapan Elektrodeposisi Tembaga Soleh Wahyudi; Syoni Soepriyanto; Mohammad Zaki Mubarok; Sutarno Sutarno
Al-Kimia Vol 7 No 2 (2019): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Copper deposits have been obtained by the electrolysis method using copper sulfate and sulfuric acid. The effect of copper concentration and current density on the surface morphology of copper deposits and current efficiency have been studied. The variation of copper concentration is 0.04 M and 0.8 M and the variation of current density is 2-8 A/dm2. The copper deposits will be photographed macro, weighed and characterized by Scanning Electron Microscope (SEM) to determine the surface morphology of deposits and Energy-Dispersive X-ray spectroscopy (EDX) to determine the chemical composition of deposits. The surface morphology of copper deposits in the form of compact and without nodules was reached at copper concentration is 0.8 M and the current density is 2 A/dm2 with the average of current efficiency is 96%.

Pengaruh Karaginan dari Rumput Laut Merah (Eucheuma cottonii) Asal Provinsi Aceh sebagai Edible Coating terhadap Ketahanan Buah Reni Silvia Nasution; Husnawati Yahya; Muhammad Ridwan Harahap
Al-Kimia Vol 7 No 2 (2019): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

The coating substance on tomato, apple, and kiwi from carrageenan of Eucheuma cottonii that originated from Aceh was made with additional PEG (polyethylene glycol) plasticizer to increase the fruit shelf life. Carrageenan of Eucheuma cottonii was extracted using 14% alkaline solution (KOH) and precipitated using IPA (isopropyl alcohol). The coating substance was made using various combination of carrageenan (0,1%, 0,2% 0,3%) and PEG (polyethylene glycol) with concentration 0,5% (v/v). Fruit coating process was carried out by immersion until the whole fruit well submerge. The examination was carried out through functional groups identification of carrageenan from Eucheuma cottonii and the coating substance. The coating substance was observed toward fruits resistance to see changes in physical shape and hardness of fruit and used a microscope with 450 times enlargement to observe the fruit surface at 0 day, 6th day, 12th day and 18th day. As the result, carrageenan that extracted from red seaweed (Eucheuma cottonii) shown the suitable structure with the commercial carrageenan. From the observation result, coated fruits resistance which was observed at 12th day shown apple and tomato have a better hardness and physical appearance with 0,3% carrageenan than with 0,1%, 0,2%, and control, meanwhile for kiwi with 0,2% carrageenan.

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.

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