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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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Isolasi dan Identifikasi Senyawa Metabolit Sekunder Ekstrak n-Heksan dari Umbi Lobak (Raphanus Sativus Lamk) Ummi Zahra; Muharram Muharram; Asriani Ilyas Asriani Ilyas
Al-Kimia Vol 1 No 1 (2013): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Isolation and identification of secondary metabolite compound in extract of n-Hexane in Umbi Lobak (Raphanus sativus Lamk) have been carried out. The purpose of this research is to know secondary metabolite compound which is contained in Umbi Lobak (Raphanus sativus Lamk) which obtained from Gowa. The compound was obtained by isolation process that consists of several steps including extraction, fractination, purification, and identification. Extraction was carried out using maceration with n- hexane. The identification has done by phytochemistry test, melting point, solubility, TLC, and IR spectroscopy. The result of research found out that the obtained compound was the steroid compound, with melt point 133-133,5 oC and had positive reaction toward Lieberman Burchad reagents, where the Lieberman Burchad reagent resulting is green which perfectly solved in n-hexane, bit solved in methanol, and could not be solved in aceton. TLC analysis showed a stain in three scales different solvent and the result of elucidation structure in IR spectrophotometer showed that compound which get is β sitosterol.

Sintesis Heksa-p-tert-Butilheksaesterkaliks[6]Arena dari p-tert-Butilkaliks[6]Arena Nasriadi Dali; Abd. Wahid Wahab; Firdaus Firdaus; Maming Maming
Al-Kimia Vol 3 No 1 (2015): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

A research has been done to synthesize hexa-p-tert-butylhexaestercalix[6]arene using p-tert-butylcalix[6]arene as a starting material. The synthesis was carried out by esterifying p-tert-butylcalix[6]arene. Synthesis products were identified and characterized by melting point, TLC, FTIR, 1H-NMR, and 13C-NMR spectrometers. Synthesis products was obtained a white solid powder (68.45% recovery), melting point 349-351 °C, TLC (SiO2, ethanol: ethyl acetate = 1: 1 v/v, Rf = 0.90). The results of the analysis of synthesis products with FTIR, 1H-NMR, and 13C-NMR spectrometer showed that the synthesis products compound is 5, 11, 17, 23, 29, 35-hexakis (p-tert-butyl)-37, 38, 39, 40, 41, 42-hexakis (ethoxy-carbonylmethoxy) calix[6]arene.

Pemanfaatan Limbah Cangkang Kerang Hijau (Perna Viridis) Menjadi Kitin Sebagai Biokoagulan Air Sungai Syamsidar HS; Ramayana Ramayana; Kurnia Ramadani
Al-Kimia Vol 5 No 1 (2017): 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.v5i1.2859

This study aims to determine the optimum weight of chitin that used as biocoagulant of river water. The water sample is taken from Kajenjeng river and the chitin used for research are isolated from green mussels (Perna viridis) shell powder through three steps such as deproteination by NaOH 3%, demineralization by HCl 1,25 N and depigmentation by NaOCl 4%. Then, the obtained chitin are contacted into water with variation of 0,25 gram; 0,5 gram; 0,75 gram and 1 gram in an hour. The result showed that optimum weight of chitin for COD determination, total hardness, calcium and turbidity is 0,75 gram, while optimum weight of chitin for magnesium determination is 0,5 gram.

Pengaruh Komposisi Kitosan Terhadap Sifat Biodegradasi dan Water Uptake Bioplastik dari Serbuk Tongkol Jagung Muhammad Nur Alam; Kumalasari Kumalasari; Nurmalasari Nurmalasari; Ilmiati Illing
Al-Kimia Vol 6 No 1 (2018): 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.v6i1.4778

The aim of this research is to obtain the effect of chitosan addition on the properties of biodegradation and water uptake for bioplastics. Bioplastic is made from mixing corncob powder and chitosan using by gliserol as plasticizer. Bioplastic is synthesized for gelatinization temperature of 80oC. Chitosan addition is varied to 2, 4, and 6 g. Based on the analysis, the addition of chitosan can significantly decrease water uptake of bioplastic. The lowest percentage of water uptake was 8.59 % by addition 6 gr chitosan. The highest weight loss percentage of bioplastic was 88,42 % which is obtained by the addition of 2 gr chitosan heaped for 15 days in soil. This indicates that the bioplastic has the high biodegradation properties. Also, the result of FTIR analysis indicated presence of O-H and N-H groups of bioplastics due to the addition of chitosan and glyserol, but their instensity experienced falling down and shifting at the wave numbers after stockpiled.

Sintesis Heptapeptida Linear (H-Tyr-Asp-Pro-Ala-Pro-Pro-Pro-Oh) dengan Menggunakan Dic/Oksima sebagai Reagen Pengkopling Rani Maharani; Eka Fitri Yanti
Al-Kimia Vol 4 No 1 (2016): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

A tetrapeptide, an analog of trypsin-modulating oostatic factor (TMOF), has been synthesised by using a method of solid-phase peptide synthesis on 2-chlorotrityl chloride resin. Fmoc strategy was applied on the synthesis. The formation of peptide bond was facilitated by DIC/oxime as coupling reagent. After all of amino acids were attached on the resin, tetrapeptidyl resin was added by a mixture of TFA:water:EDT(90:5:5) in dichloromethane to cleave the peptide.Crude peptide was purified by reverse-phase column chromatography and the purified peptide was analysed by TOF ES-MS spectroscopy.

Analisis Linearitas Keluaran Radiasi pada X-Ray Mobile dengan Menggunakan Piranha Nur Mukminah R; Iswadi Iswadi; Ihsan Ihsan Ihsan
Al-Kimia Vol 2 No 1 (2014): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

The research was conducted on the linearity of the output radiation in the mobile X-ray by using Piranha. This study aimed to measure the radiation dose exposure, to determine the relationship between the increase in the voltage of the radiation dose exposure and increase the tube current to the radiation dose exposure, as well as to analyze the radiation output and linearity of the output radiation. Data collection was conducted at the Dr. Tadjuddin Chalid Hospital Makassar in radiological installation. In this study the variables that measured the radiation dose and exposure variables that change the tube current and voltage. The data obtained and analyzed to calculate the value of the output radiation and radiation output linearity in the X- ray mobile. The analysis showed that the X-ray mobile with GE brand that are in radiological installation Dr. Tadjuddin Chalid Hospital has good linearity.

Pembuatan Dan Aktivitas Antibakteri Yogurt Hasil Fermentasi Tiga Bakteri (Lactobacillus bulgaricus, Streptococcus thermophilus, Lactobacilus acidophilus) Dian S. Kamara; Saadah D. Rachman; Ridya Widya Pasisca; Sadiah Djajasoepana; O. Suprijana; Idar Idar; Safri Ishmayana
Al-Kimia Vol 4 No 2 (2016): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Exploitation of synthetic antibiotics compounds not only have positive effect for human, but also have side effect that can be unfavorable, therefore many researches are being conducted to find natural antibiotics compounds that are safer. Lactic acid bacteria has the abilitytoproduce antibacterial compound when used in fermentation process.For example, Lactobacillus acidophilus produces acidophilin and acidolin. The main purpose of the present study is to investigate antibacterial activity of yogurt fermented with mixed bacterial culture of L. bulgaricus, S. thermophilus and L. acidophilus against Escherichia coli (representing Gram negative bacteria) and Bacillus subtilis (representing Gram positive bacteria). The antibacterial activity of the yogurt at three different time points (5, 7 and 9 hours) were examined. We also investigate the fermentation parameters of the yogurt production. The results of the present study indicate that the crude yogurt extract has antibacterial activity, where the highest activity was observed at 7 hour of incubation, resulting 0.35 and 0.30 cm of clear zone against E. coli and B. subtilis, respectively. It is most likely that the compound is non protein compound.

Modifikasi Biodiesel Melalui Reaksi Oksidasi Menggunakan Gelombang Ultrasonik Aisyah Aisyah; Sappewali Sappewali; Nurlina Nurlina
Al-Kimia Vol 1 No 2 (2013): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Biodiesel is an alternative energy fuel that is sustainable and environmentally safe. However, biodiesel has a higher cloud point than fuel diesel because it contains several saturated fatty acids such as oleic acid, linoleic and linolenic acid so that biodiesel tend to solidify at a temperature higher than the freezing point of diesel. This study aims to modify biodiesel from candlenut oil (Aleurites moluccana) through oxidation reaction by KMnO4 using ultrasonic equipment. The products obtained were analyzed using FTIR and GCMS instrument. FTIR analysis showed that spectral data of the four modified samples which run in 20, 30, 40 and 50 minutes practically similar. The methyl ester products are characterized by typical bands at specific frequencies such as stretch of C = O; C-C; C-H (sp3) and = C-H (sp2). Fragmentation patterns by GCMS showed that the oxidation reaction in 20, 30, 40 and 50 minutes did not undergo bond disconnection. The components produced is methyl palmitate, methyl linoleate, methyl oleate, heksadekanoat acid, 9, 12 and 9,17oktadekadienal oktadekadienoat acid.

Kinetika Biodegradasi Limbah Minyak Bumi Menggunakan Biokompos Wa Nirmala Wa Nirmala; Asri Saleh; Iin Novianty
Al-Kimia Vol 3 No 2 (2015): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Kinetic study of the biodegradation petroleum waste by using biocompost was conducted to determine the concentrations of Total Petroleum Hydrocarbons (TPH) decline. It can be seen from the reaction kinetics of biodegradability by calculating the rate constant and reaction order of biodegradation of the petroleum waste. Otherwise it can be seen also from the activity of enzymes involved in the biodegradation namely enzymatic kinetics by measuring the value of Km and Vmax. Research methods are mixing biocompost and petroleum waste, measurement of pH, water content and determining the concentration of TPH at day 0, 7, 14, 21, 28 and 35. The concentrations of TPH before and after biodegradation are 11.23% and 0.54%. The results show biodegradation by using biocompost can decrease the Total Petroleum Hydrocarbons up to 95.19% within 35 days. The degradation rate is 0.502% per day while the rate constant is 0.0847 which relevant to the first-order reaction rate. The reaction kinetics of biodegradation by oxygenase enzyme show Vmax and Km value as 0.0834 and -0.9920, respectively.

Penguraian Zat Warna Tartrazin pada Limbah Pencucian Mie Aceh Secara Ozonolisis dan Penyinaran Matahari dengan Penambahan Katalis ZnO Bhayu Gita Bhernama
Al-Kimia Vol 5 No 2 (2017): December
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.v5i2.3641

People's habits in consuming Aceh noodles make the noodle industry grow rapidly, but the waste treatment process becomes less effective. In the process of making the noodles, dye waste is produced in the form of tartrazine dye and need to be processed before being disposed into the environment. The research purpose was to describe the decomposition of tartrazine using ozonolysis and solar radiation methods as one of the solutions in the waste treatment process. The use of ZnO as catalyst is to accelerate the decomposition reaction of the noodle washing wastes. The results of the analysis concluded that ozonolysis methods are more effective in decomposing tartrazine in the noodle wash wasted by solar irradiation method. The sun exposure decomposed tartrazine by 99.74% using 0.015 g ZnO for 150 min and tartrazine content obtained 0.022 mg/L with a sunlight intensity of 1.24 x 1016 cm-2 s-1. Ozonolisis exposure decomposed tartrazine by 98.68% using 0.020 g ZnO for 12 minutes and tartrazine content obtained 0.112 mg / L.

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