solvent for extraction of antioxidants from mahua as the related extract contained the highest amount of phenolic compounds and also exhibited the strongest antioxidant capacity in all the assays used‚ while ethanol was the inefficient solvent for the extraction of phenolic compounds‚ Whereas ethanol and distilled water have been the lowest antioxidant activity. It can be concluded that‚ fruit and mahua of
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and the battery life for a charge is only 37 miles. There would be no value for us to use electric cars. (Courture‚2011). Ethanol is a grain- based alcohol that has been used to supplement petroleum since the 1970’s. A disadvantage is it costs about three times more to produce then gasoline. It also will take about 1.5 times the amount of ethanol as it would with gas to operate a vehicle. Additionally‚ current fertilizer is petroleum-based‚ thus undercutting the true value of using
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similar formula and chemical properties‚ and increase in molecular size and mass. When the equations for combustion of these alcohols are listed in the order of increasing number of carbon atoms‚ Methanol 1 CH3OH(l) + 3/2 O2(g) ⋄ 1 CO2(g) + 2 H2O(l) Ethanol 1 C2H5OH(l) + 3 O2(g) ⋄ 2 CO2(g) + 3 H2O(l) Propanol 1 C3H7OH(l) + 9/2 O2(g) ⋄ 3 CO2(g) + 4 H2O(l) Butanol 1 C4H9OH(l) + 6 O2(g) ⋄ 4 CO2(g) + 5 H2O(l) Pentanol 1 C5H11OH(l) + 15/2 O2(g) ⋄ 5 CO2(g) + 6 H2O(l) The number of CO2 molecule increases
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COLLIGATIVE PROPERTIES 1. Calculate the vapor pressure when 10.o mL glycerol (C3H8O3) is added to 500.0 mL water at 500C. At this temperature the vapor pressure of pure water is 92.5 torr and its density is 0.988 g/mL. Density of glycerol is 1.26 g/mL. 2. Calculate the boiling point and freezing point of the solution if 1.00 kg of ethylene glycol (C2H6O2) is added to a car radiator which contains 4450 g water. a. Kb of water = 0.512 oC/m at normal boiling point of 100oC b. Kf of water
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oxidising agents such as KMnO₄‚ Na₂Cr₂O₇ and H₂CrO₄ can be used. The reaction between alcohols and carboxylic acids will produce esters. Apparatus: Stopper‚ dropper‚ test tube‚ stopwatch‚ water bath‚ measuring cylinder (10ml) Chemical Reagents: Ethanol‚ n-Butanol‚ 2-Butanol‚ Alcohol X‚ Lucas reagent‚ 2-methyl-2-propanol‚ Concentrated H₂SO₄‚ 0.04 M Na₂Cr₂O₇‚ Glacial acetic acid Procedure (a) Lucas
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Tetraethoxysilane (TEOS‚ 99%)‚ chloropropyltriethoxysilane (CPTES‚ 99%)‚ absolute ethanol (EtOH‚ 99%) and other chemicals were purchased from Merck and Sigma Aldrich companies and used without further purification. Ciprofloxacin was purchased from Pars Daru Company. Preparation of modified magnetic silica NPs (Fe3O4@SiO2~Cl) Initially‚ the magnetic NPs prepared through a coprecipitation method and coated with a silica layer via a modified sol-gel method [20]. In brief‚ FeCl3.6H2O (0.036 mol) and
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water bath on which it is evaporated to approximately 5 ml. The 5 ml mixture was cooled to 40oC and 10 ml acidified 95% ethanol was included with vigorous stirring. The resulting mixture was placed in an ice bath for at least thirty minutes. This was again centrifuged for 5 minutes at 6000 rpm and the supernatant was discarded. The formed residue was washed with 1ml of 95% ethanol and twice with a small amount of water. The washed crude RNA was transferred in an evaporating dish and was quantitatively
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condensing and collecting the alcohol rich vapours released‚ as a high alcohol strength liquid (spirit). The starting material for most distillations‚ such as wine for brandy and beer for whisky‚ are usually weak alcoholic solutions (5%-7% v/v ethanol) This seems counter intuitive‚ as it would seem that if the desired product is alcohol‚ the starting solution should have a high alcohol concentration. The reason for starting with a relatively low alcohol starting material is that alcohol
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tetraphenylcyclopentadienone Overall Synthesis: CHEMICALS: wk 1: thiamine hydrochloride (1 g/student)‚ 95% ethanol (8 mls/ student)‚ 2M NaOH (5 mls/student)‚ benzaldehyde (4 mls/student) wk 2: 95% ethanol (30 mls/student) wk 3: acetic acid (6 mls/student)‚ ammonium nitrate (1 g/student)‚ 0.1g/ml cupric acetate (1.5 mls/student)‚ dichloromethane (6 mls/ student)‚ 30% acetone in heptanes (3 mls/student)‚ 95% ethanol (20 mls/student) wk 4: 1‚3 diphenylacetone (0.5 g/student)‚ triethylene glycol (5 mls/student)
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Alcohol Should Be Banned By: ******* An alcoholic beverage is a drink that contains ethanol. Alcoholic beverages are separated into three types: beers‚ wines‚ and spirits. Alcohol is a substance that a lot of people‚ mostly of age and people underage drink to "forget about their troubles or problems". People drink because they like it when it makes them feel on cloud 9‚ to feel at bliss. Alcohol is just a waste of time‚ money and patience. Drinking alcohol only makes you feel like you’re in
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