Marina Chimica Acta
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THE USE OF DIETHANOLAMINE AS A CO2 ABSORBENT IN WAS TAKE THE DETERMINATION CORAL REEF AGE IN BARRANG LOMPO ISLAND SPERMONDE ISLANDS THROUGH MEASUREMENTS OF 14C ACTIVITY BY LIQUID SCINTILLATION COUNTING (LSC) METHOD
Full text linkResearch on the use of diethanolamine (DEA) as a CO2 absorbent in was take the determination coral reef age in Barrang Lompo Island, Spermonde Islands through measurements of 14C activity by liquid scintillation Counting method (LSC) was carried our. Coral reef sample of the island Barrang Lompo at coordinates 5 ° 06 \u2749 " LS 119 ° 25\u27 20" BT with a dept of 3-4 meters from the sea surface. Coral reefs (coral reef) is an ecosystem that live on the water in the form of limestone formations (CaCO3). Sample preparation is done physically and chemically. Chemical preparation of coral reef sample was using 30% H2O2 continued with HClO4 mixture and H2O2 30% and the last with a solution of HCl to produce a clean sample with a weight reduction of 16.318%. Carbonate samples separated as CO2 by reaction with 10% HCl and absorbtion by diethanolamine to produce carbamate compounds with 62.236% efficiency. Total carbon in the sample solution is obtained through a 1,709 gram reduction methods before and after absorption. Radiocarbon dating method is based on measuring the specific activity of the samples obtained from the results of the count Liquid Scintillation Counting (LSC) Hidex 300 SL, which is 7.938192 dpm/gC. The specific activity of the age of the coral reefs are estimated 5425.452 yea
ANALYSIS OF VOLATILE ORGANIC COMPOUND OF MALLAWA HONEY
Full text linkThis study aimed to determine the volatile organic compound for Mallawa honey. The quality of honey is determined from the nectar source, geographic location, and the processing technology. Volatile organic compound is one of the indicators in honey to determine the quality marker and this compound is formation aroma of honey.This research was done in three stages, namely the stage of sample preparation, extraction phase, and phase identification. Stages of sample preparation was performed to determine sampling locations, the determination of the location of the extraction and identification. Extraction is done in analytical chemistry laboratory Science Faculty, Hasanuddin University. Honey samples were extracted with n-heksan. The identification process carried out in an integrated laboratory Department of Chemical Science Faculty of Hasanuddin University, GCMS performed while the data in Forensik laboratory, POLRI. The results were obtained 35 volatile organic compounds, which are grouped into six classes of compounds, namely: hydrocarbons, acid, aromatic, ketones, aldehides and the other compound
ANALYSIS OF THE LEAD (Pb) CONTENT IN SEDIMENT, SEA WATER AND BLOOD COCKLE Anadara granosa L. FROM THE COASTAL WATER OF MAKASSAR
Full text linkThe research about analysis of the content of heavy metal lead (Pb) in sediment, sea waterand blood cockle Anadara granosa L. from the caostal water of Makassar has been done.This research was aimed to figure out the Pb content in the sediment, the sea water and theblood cockle A. granosa L. The sample was taken by using Purposive sampling method. Thesamples preparation used composite method and Pb level in samples was determined byAtomic Absorption Spectrofotometric (AAS). The result showed that at Tanjung Bunga, theaverage of Pb content in the: sea water 0,289 ppm, sediment 0,609 ppm and blood cockle A.granosa L. 0,704 ppm. In the Mangara Bombang, the average of Pb content in the sea water0,273 ppm but Pb level in the sediment and in the blood cockle A. granosa L. were notdetected
ISOLATION, IDENTIFICATION AND BIOACTIVITY TEST OF NON POLAR COMPOUNDS ON n-HEXANE EXTRACT OF Haliclona (Reniera) fascigera FROM SAMALONA ISLAND-SPERMONDE ARCHIPELAGO
Full text linkIsolation, identification and bioactivity test of nonpolar compunds has been conducted on n-hexane extract sponge Haliclona (Reniera) fascigera of the island Samalona, Makassar, South Sulawesi. Isolation techniques consist of maceration, partition, fractionation using 2 steps using vacuum column chromatography and flash column chromatography and also purification step. Identification of isolate was analyzed with TLC, FTIR, GC-MS, and 1H NMR. The research result was obtained isolate as much as 4 mg and clear solid form. FTIR analysis indicate functional group OH, CH2, CH3, C=O, =CH and C-O. Identification of spot TLC under UV light and spotting solvent show that the spot was active on UV long and short waves and dark brown with cerium sulphate. The results show that isolate A contain aliphatic and alcohol compounds. Bioactivity test results indicate that these isolate A be able to inhibit the growth of bacteria Staphylococus aureus with inhibition zone diameter were 11.60 mm (100 ppm); 10.40 mm (50 ppm); 9.50 mm (25 ppm); 6.50 mm (10 ppm); 6,60 mm (negative control); 17.40 mm (positive control) and against bacteria Escherichia coli with inhibition zone diameter were 6.70 mm (100 ppm); 6,10 mm (50 ppm); 5,90 mm (25 ppm); 5.85 mm (10 ppm); 5,20 mm (negative control); 18.60 mm (positive control)
APPLICATION METHODS LIQUID SCINTILLATION COUNTING (LSC) IN DETERMINING CONCENTRATION OF BIO SOLAR
Full text linkResearch on the use of a liquid scintillation counter method in determining the concentration of biodiesel in the market has been carried out by taking samples of biodiesel in Pertamina. Preparation done by creating a standard biodiesel and biodiesel mixed with diesel at a certain concentration. Biodiesel is chemically formed by the transesterification and esterification process is converted into methyl ester triglycerides with the help of H2SO4 and NaOH as a catalyst. Total carbon in the sample solution is 1.5690 g/8 mL obtained through methods spekktrofotometri uv-vis. The method of determining the concentration of a specific activity based on measurements of samples obtained from the shredded Liquid Scintilation Counter (LSC) Hidex 300 SL, ie 11.5902 DPM / gC. By using the specific activity of the sample and the specific activity was added to standard linear equations of the obtained sample concentration of biodiesel amounted to 18.81%
MINERAL CONTENT AND PHYSICO-CHEMICAL CHARACTERISTICS IN
Full text linkOES. Characteristic moisture content, ash content, electrical conductivity and pH are also performed. The Largest mineral content of honey is K up to 113,74 mg/L followed by Ca, Mg dan Na (mg/L), respectively 80,68; 28,37; 17,1. Some micro mineral found in Terasa’s honey such as; Fe, Se, Ni, V and Co (mg/L), respectively 0,976; 0,078; 0,11; 0,042; dan 0,035. Heavy metal Cd is also present in very small concentrations average 0,005 mg/LKeyword; multifloral honey, mineral content, moisture content, ash content, conductivity, p
ANALYSIS MINERAL ESSENTIAL (CRHOMIUM, ZINC AND MANGAN) AND BIO-PHYSICAL CHEMISTRY TEST AT HOME HONEY DISTRICTS KINDANG BULUKUMBA
Full text linkHoney is a sweet liquid that comes from the nectar of plants that are processed by bee. The composition of minerals in honey is an important factor in determining the quality of honey because it can affect the properties of bio-chemical physics honey. This research investigated the essential minerals concentration (Cr, Zn, and Mn), as well as the properties of bio-chemical physics. Three samples were collected from different location in the district Kindang is, Kindang, Pattallassang and Oro Gading. Honey samples were analyzed for essential micro mineral Chromium, Zinc and Manganese by using instrument ICP-OES and also analyzed for common bio-physicochemical parameters like moisture content, acidity, ash, pH, conductivity, protein, fat, carbohydrate and calorie. Ranged concentration manganese content of honey from 0.05 to 0.07 mg/mL0,05-0,07 mg/mL and concentration of chromium ≤0,1 ng/mL-0.22 mg/mL, whereas the concentration of zinc is below the limit detection tool that is ≤0,1 ng/mL. The average value of the quality of honey Kindang districts is 19.69% water content, ash content of 0.26%; DHL 0.36 mS/cm; 22.06 acidity meq/kg; pH 4.43; protein of 7.19% (w/w); 0.1301% fat. Total carbohydrate is 72.55%; calories 320.3101 cal; and energy 1340.2289 KJ. The results of this study indicate that manganese has the highest concentration in all samples of honey and showed tah hhoney from Kindang district have the a good quality according to national and international standar of hone
ANALYSIS METALS Fe AND Mn IN SEAGRASS ENHALUS ACOROIDES IN THE WATERS PASARWAJO BUTON
Full text linkThe research aims to identify ferrous metals and manganese in seagrasses Enhalus acoroides. The sample used was obtained from the water pasarwajo buton. The sample was extracted, then the metal was analyzed using AAS. Metal concentrations (ppm) are Fe (143.667 mg / kg) and Mn (46.67 mg / kg), respectively. Metal content obtained below the maximum limit and seagrass Enhalus acoraides can be used as a bio-indicator of the presence of heavy metal
QUALITY ANALYSIS OF BIODIESEL FROM PALM OIL
Full text linkBiodiesel (fatty acid methyl esters or FAME) an alternative fuel to substitute diesel oil or diesel fuel made from oils or fats of vegetable or animal. Oils commonly used for biodiesel fuel, among others palm oil. Biodiesel is produced through the transesterification of oils or esterification of fatty acids. The research objective was to determine the quality of biodiesel from palm oil reflux results through the process of esterification and transesterification. Transesterification reaction is the formation of esters and glycerol from trigliserin (fat/oil) with methanol. Transesterification is a type of equilibrium reaction (reversible, where the addition of NaOH catalyst (chemical catalysts) can accelerate the achievement of a state of equilibrium. The results showed that rendamen biodiesel was obtained by 77% and quality parameters that defined American Society for Testing and Materials (ASTM D6751) has meet the standards in terms of density of 0.8654 g/mL, saponification 5.2979 mg KOH /g of oil, iodine number 18.9184 g I2/100g.Keywords: Quality, biodiesel, palm oi
PRODUCTION AND CHARACTERIZATION CHITOSANASE OF SPONGE
Full text linkChitosanase enzyme is an enzyme to catalyze the bonding endohidrolisis (1.4) β- glucoside on chitosan into a series chitosan oligomers or chitooligosaccarides. Chitosanase of microbes give good results in producing chitooligosaccarides, but very expensive for use in large-scale industry. This study aims to manufacture and characterization of crude chitosanase enzyme from Klebsiella sp used to hydrolyze chitosan into chitooligosaccarides. Chitosanase produced in the fermentation medium containing 0.5% colloidal chitosan for 60 hours with the activity of 0.309 U / mL (5,235 U / mg), work optimally at 40 ° C and pH 8, is stable at pH 6-7, activated by Co2 + ; Ca 2+ and Ni 2+. Chitooligosaccarides obtained in the form of a mixture of monomer to octamer, which soluble in acetic acid 0.25% to 0.5%, having intrinsic viscosity decreases with increasing time of incubation with molecular weight range of 4103.12 g / mol (incubation 1 hour) ; 1483.48 g / mol (incubation 2 hours) and 1065.79 g / mol (incubation 3 hours).Key word : Chitosanase, Klebsiella, Chitooligosaccaride