out by the lab assistant or instructor. Consider that the nucleophiles may be influenced by interactions with the solvent. These interactions are much more significant in protic solvents (e.g.‚ water and alcohol) than in aprotic solvents (e.g.‚ acetone or DMSO). Experimental Procedure
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Charles W. Virgill Organic Lab Report Extraction Separation of a Carboxylic Acid‚ a Phenol‚ and a Neutral Substance Purpose The objective of the experiment is to identify the three substances in the mixture and to determine the percent recovery of each from the mixture. The unknown will consist of either benzoic acid or 2-chlorobenzoic acid‚ 4-t-butyl phenol. Determine the weight of crystals and also the percent yield Introduction There are various techniques of
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cotton balls‚ nails clipper‚ nail file‚ hand lotion or cream‚ your choice of nail polish‚ a clear top coat‚ and a Q-tip. B. REMOVE ANY OLD NAILPOLISH: If you have old nail polish‚ make sure to remove it from your nail using a cotton ball and acetone. C. CUT & FILE YOUR NAILS: Use nail clippers and trim your nails. Then‚ using a nail file‚ file the nail and create a smooth and clean shape. DO NOT file your nails in the same direction‚ it actually weakens the nail and causes breakage.
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Materials and Methods Animals The Animal Ethics Committee of the Experimental Toxicology Unit from Medical College of Villa Clara‚ Cuba‚ approved experimental protocol. Male and female Wistar rats were used. All rodents and their food were purchased at the National Center of Laboratory Animal Production (Havana‚ Cuba).Animals were kept in specific pathogen–free conditions. Room temperature was 22 ± 2 °C on a 12-h:12-h light:dark cycle. Access to food and water was ad libitum. Sucrose Metabolic Syndrome
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Experiment # 1 Date: 18/12/13 Title: Chemical Properties of Alkanes. Aim: To test the reactivity of alkanes using cyclohexane as an example. Apparatus/Materials: Cyclohexane‚ liquid alkane‚ aqueous bromine‚ test tubes‚ light source‚ watch glass‚ splint‚ 0.1 MKMnO4‚ concentrated H2SO4‚ dilute H2SO4. Method: Combustion: 1. A watch glass was placed on a benched protection sheet in a fume cupboard and the extractor in the fume on. 2. 4 drops of cyclohexane was placed on the watch glass using
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INTERNATIONALE PHARMACEUTICA SCIENCIA | Jan-March 2011 | Vol. 1 | Issue 1 | Available online http://www.ipharmsciencia.com ©2011 IPS REVIEW ARTICLE Phytochemical screening and Extraction: A Review ABSTRACT Plants are a source of large amount of drugs comprising to different groups such as antispasmodics‚ emetics‚ anti-cancer‚ antimicrobials etc. A large number of the plants are claimed to possess the antibiotic properties in the traditional system and are also used extensively by the tribal people
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Properties of Alcohols and Phenols Experiment #3 Objectives: To observe the solubility of alcohols relative to their chemical structure‚ to perform chemical tests to distinguish primary‚ secondary and tertiary alcohols‚ and a color test for phenol. Introduction The general formula of an alcohol is ROH in which the R is an aliphatic hydrocarbon group. Alcohols may be looked upon as derivatives of water‚ HOH. One hydrogen of water is substituted by an alkyl group‚ R. Like water‚ alcohols show hydrogen
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Anoxic Brain Injury impaired physical mobility r/t muscle weakness and disease process self care deficit: dressing and grooming r/t cognitive impairment chronic confusion r/t impaired decision making ineffective coping r/t impaired information processing noncompliance with nursing staff r/t behavior problem due to mental decline impaired verbal communication r/t aphasia-speech deficit risk for falls r/t muscle weakness risk for impaired skin integrity r/t bedridden/chairbound
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longer with the polar adsorbent‚ while the least polar compound travels with the eluent that is lower in polarity. 2. TLC in today’s experiment stands for Thin Layer Chromatography. 3. From least polar to the most polar: Heptane-Toluene-Acetone-Methanol-Acetic acid ‚ ‚ ‚ ‚ 4. The Rf (Retardation factor) is the ratio of the distance that the compound/mixture traveled to the distance the solvent/mobile phase traveled. 5. From least Rf to the highest Rf: Benzoic acid – Benzaladehyde
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In chemistry‚ an alcohol is an organic compound in which the hydroxyl functional group (-OH) is bound to a carbon atom. In particular‚ this carbon center should be saturated‚ having single bonds to three other atoms.[1] An important class of alcohols are the simple acyclic alcohols‚ the general formula for which is CnH2n+1OH. Of those‚ ethanol (C2H5OH) is the type of alcohol found in alcoholic beverages‚ and in common speech the word alcohol refers specifically to ethanol. Other alcohols are usually
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