greener alternative because using mCPBA is twice as expensive as Oxone and leaves behind the epoxide plus m-chlorobenzoic acid while Oxone creates non-toxic byproducts and recycles acetone in the epoxidation reaction. Introduction The epoxidation of an alkene creates an epoxide that is reactive to nucleophiles. This is important in organic chemistry as well as biological sciences. For example epoxide hydrolase aids in purification during drug metabolism. The mechanisms for Oxone and mCPBA epoxidation can
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(Enclosure No. 4 to DepEd Memorandum No. ___‚ s. 2012) Format of Research Paper Investigatory papers that were reviewed by the national SRCs in the past years were found to have inadequacies in the content particularly in the areas cited below. These rules are found in the Guidelines (http://www.societyforscience.org/isef/rulesandguidelines) and in the Student Handbook (http://www.societyforscience.org/document.doc?id=12). The description of the research plan and the sample abstracts are provided
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Separation techniques LIQUID CHROMATOGRAPHY ‘THE ART OF SEPARATION’ CHROMATOGRAPHY – AN INTRODUCTION Chromatography is a technique through which a mixture of chemical components are separated‚ identified and determined accurately. This technique while provides a way for analytical separations‚ also useful for preparative techniques by which pure compounds can be obtained. Detector Signal Blue Compound Sample Injection + Mobile Phase Retention Time Red Compound It is i defined d fi d as a
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CHIPS/ CHICKEN NUGGETS ABSTRACT: RBD Palm olein oil is a type of vegetable oils with the ratio of saturation to unsaturation 40%: 60%. Soybean oil is another type of vegetable oils with the ratio of saturation to unsaturation 20%: 80%. In addition to the chemical alterations that occur during frying‚ changes in the oil’s physical and thermal properties‚ such as surface tension‚ viscosity‚ density‚ specific heat‚ and convective heat transfer coefficient can affect food quality (Rosana G. Moreira
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ACKNOWLEDGEMENT I am indebted and express my sincere thanks to my supervisor Professor Huada Daniel Ruan‚ who has provided me with invaluable guidance throughout this work and has been a constant source of encouragement and assistance. In addition‚ I would like to express my appreciation to Mr. Car Wu for the guidance and continuous assistance on equipmentusage and advises for research. ______________________ Signature of Student ______________________ Student Name Environmental
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What is the correct stereochemical assignment for each of the following alkenes? A. B. C D. E. A = E; B = Z; C = E A = Z; B = E; C = E A = Z; B = Z; C = Z A = E; B = E; C = Z A = E; B = E; C = E A B C
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Experiment 5 Title : Thin Layer Chromatography Objectives: i. To distinguish polar and non-polar solvents. ii. To familiar with the analysis technique by using the thin layer chromatography. iii. To differentiate the retention factor‚ Rf for different compounds. [pic] Result: |Compound |Distance traveled by the compound | |o-nitroanaline |2.45
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 0620/01 October/November 2008 45 Minutes *6400528663* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the
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N 14 nucleus after two successive β-emissions would be A 6. B 7. C 8. D 9. (ii) The equation for the relative lowering of vapour pressure when solute remains normal is (iii)The relative lowering of vapour pressure of a solvent by the addition of a solute is A equal to the mole fraction of the solute. B equal to the mole fraction of the solvent. C directly proportional to the molality of the solution. D directly proportional to the molarity of the solution. (iv) When primary amines
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involves covalent bonds. Reduction reactions can be determined through three features. The first is a loss of oxygen from a bond or loss of a bond to oxygen as in the case of carbon-oxygen double bond to a carbon-oxygen single bond. The second is the addition of hydrogen to a bond and thirdly‚ the replacement of a more electronegative atom with carbon or hydrogen. In redox reactions‚ the reductant (or reducing agent) loses electrons and is oxidized while the oxidant (or oxidizing agent) gains electrons
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