Then the polarity was increased using 2 % Methanol in Ethyl acetate to 50 % Methanol in ethyl acetate. 8 % of methanol and 92 % of ethyl acetate concentration was found to be the best concentration and after concentrating all fractions of these concentrations‚ approximately 7 to 8 mg of quercetin was obtained. 4.2 Thin layer chromatography TLC profiles were carried out for the fractions‚ performed using the solvent mixture of toluene: ethyl acetate: methanol in the ratio of 5:3:2 (v/v/v) and this
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Journal of Food Engineering 95 (2009) 240–253 Contents lists available at ScienceDirect Journal of Food Engineering journal homepage: www.elsevier.com/locate/jfoodeng Review Application of supercritical CO2 in lipid extraction – A review F. Sahena a‚ I.S.M. Zaidul a‚*‚ S. Jinap a‚ A.A. Karim b‚ K.A. Abbas a‚ N.A.N. Norulaini c‚ A.K.M. Omar b a b c Faculty of Food Science and Technology‚ Universiti Putra Malaysia‚ 43400 UPM Serdang‚ Selangor D.E.‚ Malaysia School of Industrial Technology‚ University
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COS-7 cells were provided. After washing the coverslip with Phosphate Buffer Saline (PBS)‚ one coverslip was treated with the control solution‚ and the other was treated with the X drug. Then‚ in order to preserve the cell‚ methanol was added to both coverslips. Since methanol coagulates proteins‚ it was also used to permeabilize the cell membrane. Once the cells were fixed and permeabilized‚ blocking buffer was added to each coverslip to block the nonspecific antibodies in order to keep them from
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Identification of a Conjugated Diene from Eucalyptus Oil Introduction: When two carbon-carbon double bonds are positioned next to one another‚ a conjugated diene is formed. Conjugated dienes undergo a cycloaddition reaction with certain double bonds to afford cyclohexenes and related compounds. The reaction is named Diels-Alder. The Diels-Alder reaction is between 1‚3-butadiene and ethylene to produce cyclohexene + dienedienophile. The mechanism of the Diels-Alder reaction is classified as a
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pressure changes to model You correctly answered: c. changes in the force of contraction of the heart. Experiment Data: Flow (ml/min) 35.0 70.1 105.1 140.2 175.2 210.3 245.3 280.4 Radius (mm) 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Viscosity 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 05/23/13 Length (mm) 50 50 50 50 50 50 50 50 page 2 Pressure (mm Hg) 25 50 75 100 125 150 175 200 Post-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly
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ABSTRACT Concrete has been the most preferred construction material for over five decades. It is being increasing day to day all over the world due to its versatility‚ mould ability‚ high compressive strength and many more advantages. For several years beginning in 1983‚ the problem of the durability of the concrete structures was a major topic of interest in Japan. The creation of durable concrete structures requires adequate compaction by skilled workers. One solution for the achievement of durable
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Version 017 – Exam 1 – Laude – (52455) This print-out should have 30 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 1 003 6.0 points What would be pH of a 1 M solution of a very expensive weak base‚ unobtainamine‚ whose pKb is 3.4? 6.0 points 1. 12.3 correct Consider a reaction with ∆Hrxn = 997 kJ · mol−1 . Which of the following pairs of K values and temperatures is possible for this reaction? 1. K1 =
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depends on the heating method‚ time‚ uniformity‚ and other factors. If the oil processing machinery have heat on oil‚ then the change of oil viscosity and oil binding. Steam heating effect of the process of speculation‚ make the billet in high temperature‚ and weaken the enhanced oil thermal motion of molecules and molecular cohesion‚ resulting in green oil viscosity and surface tension reduction‚ weakening the binding of grease and part of the green gel and enhance the mobility of the oil‚ oil get rid
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ABSTRACT Firstly‚ the objectives of the experiment are to observe the characteristics of the flow and to compute the Reynold’s number. Using the Solteq Osbourne Reynold’s Demonstration (model FM 11) in this experiment‚ with different of water volume flowrate‚ the characteristics of the flow could be determined. The rock inside the stilling tank are to calm the inflow water so that there will not be any turbulence interfere with the experiment. The water inlet and outlet valve and dye injector utilized
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density or specific gravity must be accurately measured in order to successfully drill a well hole. The most accurate measurement of mud density is made by using the Mud Balance. Viscosity is the resistance to flow offered by a fluid. The term is loosely applied as the flow properties of drilling mud. The relative viscosity‚ or the cuttings carrying ability of the drilling fluid‚ can be measured by the Marsh Funnel. This comparative measurement is performed by simply recording the number of seconds
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