Larvicidal Activity of Lantana camara L. Leaf Extract Liquid Fractions Against Aedes aegypti I. Introduction • Start with malaria/dengue statistics for dramatic effect‚ then transition to the title of the study • Include in-‐text citations • Include the studies & concentrations used by these studies at Slide 11 • Replace “chemical” with “synthetic”
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Introduction Recrystallization is a method used to purify solid organic compounds. Using the recrystallization technique‚ a solid compound is dissolved in a solvent and the compound slowly crystallizes as the solution cools. Using a filtration technique‚ a pure solid is produced when the molecules of the impure particles in the compound are excluded from the crystal lattice. After obtaining the pure compound‚ a melting point determination procedure can be done using a mel-temp device to correctly
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separate the Caffeine from the rest of the tea prior to evaporation. This process is known as an extraction. An Extraction is a chemical method of separating a specific component of a solution from the rest of the solution. This is done by using a solvent (in this case Chloroform) in which the substance to be isolated is very soluble‚ while the rest of the solution is not as soluble. For the purposes of this
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and rinse product with 2 Ml of ice cold ethanol Reconnect vacuum and draw the liquid from the product Repeat washing procedure with 2 Ml of acetic acid/ethanol solution Finally wash the crude product with the remaining 2 mL of ethanol FIND SOLVENT: Test 95% ethanol and toluene Addition of a few drops hexane may be necessary to promote crystallization If not satisfactory test 9:1 v/v mixture of 95% ethanol/acetone Recrystallize Characterization of aldol product Perform this test on
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Stereochemistry of Dihydroxylation Reactions Question: Can the stereochemical outcome of dihydroxylation reactions be determined by thin layer chromatography? Overview: In this experiment‚ you will perform two reactions that transform alkenes into diols. While similar in functional group transformation‚ these reactions may lead to stereochemically different products. The two possible products are diastereomers of one another‚ and therefore have different physical chracteristics. After
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A Synthesis of Safrole and o-Safrole W.H. Perkin & V.M. Trikojus J. Chem. Soc. 1663 (1927) HTML by Rhodium No direct synthesis of safrole has been recorded‚ the most recent attempt being that of Baker and Robinson (JCS‚ 1925‚ 127‚ 1424)‚ who distilled the product of the action of silver oxide and water upon gamma-piperonylpropyltrimethylammonium iodide‚ but obtained isosafrole‚ the double bond moving into the position of greater stability. Kawai (Sci. Papers Inst. Phys. Chem. Res.‚ 1925‚ 3‚ 263)
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ions back and forth between the organic phase and the aqueous phase. OH O NaOH + NaI + H2O CH3I Before coming to lab‚ please review the following techniques: "Reluxing a reaction‚" "Extraction and washing‚" "Drying an Organic Solvent‚" "Evaporating an Organic Solvent‚" "Analyzing a Solution by Thin Layer Chromatography (TLC)‚" "Separating Mixtures by Column Chromatography‚" and "Characterizing Compounds by IR." Notice that this lab brings together most of the techniques that we have used this
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Extraction and Evaporation: Separating the Components of "Panacetin" Submitted- July 17‚ 2012 Introduction The purpose of this lab is to investigate the composition of a compound suspected to be Panacetin‚ a type of pain-killer. Panacetin is typically made up of sucrose‚ aspirin‚ and acetaminophen‚ but the third component in this experiment is unknown. The unknown component is suspected to be a chemical relative of acetaminophen‚ either acetanilide or phenacetin. Using techniques such as
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it for evidence of isomerization. Calculation List of Materials 4.0g tomato paste screw cap vial Chromatography column 25ml buret 50ml flask ring stamd and clamp 50% mixture of acetone and low boiling petroleum ether 5ml extraction solvent 20ml 10% aqueous solution and 20ml of saturated sodium chloride Procedure PEPARING CHROMATOGRAPHY COLUMN Pack a column for chromatography- ref. OP-21a clamp column to ring stand over 25ml beaker close column with cork or rubber stopper
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Book‚ pgs. 41 – 44. Belleville‚ ON; Loyalist College. Kramp‚ K. (2012). Liquid/Liquid Extraction with Identification by GC. Analytical Instrumentation Lab Manual CHEM 3003‚ Version 3‚ pgs. 1 – 5. Belleville‚ ON; Loyalist College. Phenomonex. (2013). Solvent Miscibility Chart. Retrieved from: http://www.erowid.org/archive/rhodium/pdf/solvent.miscibility.pdf Webmaster Webmaster. (2013). Ethanol. Retrieved from: http://www.stenutz.eu/chem/solv6.php?name=ethanol Webmaster Webmaster. (2013). Methylene Chloride
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