solvent should be high at high temperature & low at room temperature. If possible‚ the impurities should be insoluble in the solvent. 2.> How were soluble impurities removed from the derivative? [ANS] By soaking the impure derivative in 1 cm3 of methanol and resume suction. Repeat this for about 2 times. 3.> In the recrystallization procedure‚ why were the crystals dissolved in only the minimum amount of
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Biodiesel: Technology & Business Opportunities – An Insight S Biswas‚ N Kaushik & G Srikanth Technology Information‚ Forecasting and Assessment Council (TIFAC) Department of Science & Technology‚ New Delhi – 110 016 Tel: +91-11 -2686 3816‚ Fax: 2696 1158‚ e-mail : biswas@nic.in The concept of bio fuel dates back to 1885 when Dr. Rudolf Diesel built the first diesel engine with the full intention of running it on vegetative source. In 1912 he observed‚ " … the use of vegetable oils for engine fuels
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Evaluation of Paracetamol Content in Tablet Dosage Form Using UV-Spectrophotometry Casilagan‚ Camela Mae C.‚ and Jimenez‚ Joshua M. Chemistry Department‚ College of Science Adamson University Ermita‚ Manila 1.0 Introduction UV-Visible Spectrophotometry is a widely-used technique in Chemical and Pharmaceutical Analysis. And this method has been very useful both for Qualitative and Quantitative Applications‚ especially for organic compounds. Some of its advantages for Quantitative purposes
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AVL PRODUCT DESCRIPTION FUEL CONSUMPTION MEASUREMENT AVL FUEL MASS FLOW METER Description The AVL Fuel Mass Flow Meter is a high precise and continuous fuel consumption measurement system‚ which is used worldwide at almost all engine test beds where engines of a maximum consumption of 125 kg/h are tested. The system stands out for a very high accuracy and because of the modular design it can be combined with existing conditioning systems. The fuel system AVL Fuel Mass Flow Meter enables a
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biological methods. The Chrysophyllum canito leaf extracts were used for silver nanoparticles synthesis. In this study utterly revealed the best milli molar concentrations of silver nanoparticles synthesis in diverse solvents such as aqueous‚ ethanol‚ methanol‚ chloroform and petroleum ether‚ but the excellent silver synthesized solvents only chosen for further more characterization studies. The aqueous and ethanol solvents sample and chemically synthesized oxalic acid silver synthesis got excellent
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Aldehyde and Ketone 1. ALDEHYDE Definition: An aldehyde is an organic compound containing a formyl group. This functional group‚ with the structure R-CHO‚ consists of a carbonyl center (a carbon double bonded to oxygen) bonded to hydrogen and an R group‚ which is any generic alkyl or side chain. The group without R is called the aldehyde group or formyl group. Aldehydes differ from ketones in that the carbonyl is placed at the end of a carbon skeleton rather than between two carbon atoms
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obtained. 3. Step 1 and 2 are repeated for three times to make sure the purple or pink solid is obtained. (C) The cis to trans isomerisation 1. A solution of (0.02M; 14mg in 25ml) of the trans isomer and cis isomer is prepared in methanol and its UV-visible spectrum is recorded. 2. The solution is placed quickly and tightly stoppered into a constant temperature bath at 35 °C 3. The most
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experiment synthesized H-Gly-Phe-OH dipeptide using “Fmoc chemistry”. The first part of experiment was the synthesis of L-phenylalanine methyl ester hydrochloride. The methyl ester can be synthesised by reaction of thionyl chloride‚ SOCl2 and dry methanol with L-phenylalanine under reflux condition. The peptide bond was formed later in the experiment‚ where HBTU‚ DiPEA and a solution of Fmoc-Gly-OH in DMF were added to a solution of L-phenylalanine methyl ester hydrochloride in DMF. The product formed
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seem to go wrong in the triangle. One argument researchers show is that the location of the triangle is in the deepest part of the Atlantic Ocean at 30‚000 feet. Since the region spans over the deepest part‚ it contains more methanol. The gas bubbles produced by the methanol makes the water unstable‚ therefore the water could not support a ship like it should. In support of the way planes disappear‚ scientists say that the coordinates of the triangle fall directly on the equator. That fact makes
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Synthesis of Methyl Stearate The purpose of this lab was the convert liquid methyl oleate to solid methyl stearate by catalytic hydrogenation. Firstly‚ we produced hydrogen gas using solid mossy zinc and sulfuric acid. Using the hydrogen produced in the previous reaction‚ we were able to convert the liquid methyl oleate to solid crystals of methyl stearate. A mineral oil was also used to bubbler was used to maintain the hydrogen pressure slightly above the atmospheric pressure and to prevent back-diffusion
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