Serendipity – Accidental Discoveries in Science ABSTRACT Serendipity means the faculty of making fortunate and unexpected discoveries by accidents. Penicillin‚ X-ray‚ Viagra‚ Teflon are common examples known as accidental discoveries in science. The stories of these discoveries are interesting and meaningful. X-ray for medical diagnosis and treatment‚ miracle drug penicillin‚ Viagra for treatment of erectile dysfunction‚ Teflon for frying pans‚ all of these discoveries make our life wonderful
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Salicylate. The two compounds we will be preparing‚ aspirin (acetylsalicylic acid) and oil of wintergreen (methyl salicylate)‚ are both organic esters. An ester is a compound that is formed when an acid (containing the COOH group) reacts with an alcohol (a compound containing an -OH group). O C R1 O H O + H O C R2 R1 O R2 + H O H acid alcohol ester water Here R1 and R 2 represent groups such as CH3 - or CH3 CH2 -. The reaction type shown above may be called a condensation reaction
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were oleic acid and triglyceride with one oleate ester. The yields of these compounds were 13.25% and 7.74% dry weight‚ respectively. The compounds were tested in vitro against head lice‚ comparing to the crude hexane extract of the seed. The triglyceride with one oleate ester and the crude hexane extract diluted with coconut oil 1:1. These compounds were found to kill all tested head lice in 49‚ 11 and 30 minutes‚ respectively. The triglyceride ester can be used as a marker for quantitative analysis
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Market and Nonmarket Environments Market environment includes those interactions (which involve voluntary economic transactions and the exchange of property) between firms‚ suppliers and customers that are governed by Markets and Contracts. Nonmarket environment is composed of the social‚ political and legal arrangements that structure interactions (between the firm and individuals‚ interest groups‚ govt. entities‚ and the public which are intermediated not by markets but by public and private
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We performed two procedures in which we reduced methyl acetoacetate. For the first procedure we produced a racemic mixture of Methyl (S)-3-Hydroxyacetate and Methyl (R)-3-Hydroxyacetate. For the second we produced only one of the enantiomer products depending on which enantiomer of Tartaric Acid was used. A reduction is a reaction which generally means adding more carbon-hydrogen bonds to a compound. In a reduction reaction the oxidation number of a carbon atom decreases. The opposite is an oxidation
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metabolised by cholinesterase 2-5 min onset of action Duration of action 4-8 hours (topical)‚ 24 hours for intraocular administration Parasympathomimetic that sitmulates both muscarinic and nicotinic receptors Methacholine = Synthetic choline ester‚ acts as a non-selective muscarinic receptor agonist in the parasympathetic nervous system. Used to diagnose bronchial hyperreactivity (asthma and chronic pulmonary obstructive disease).
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Everything you need to know about hydrocarbons INTRODUCTION: organic chemistry Organic chemistry is the chemistry of compounds that contain carbon and hydrogen. The element carbon has a special role in chemistry because it bonds with other carbon atoms to give a vast array of molecules. The varity of molecules is so great that we find organic compounds in many common products we use‚ such as gasoline‚ medicines‚ shampoos‚ plastic bottles‚ and perfumes. The food we eat is composed of different
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Submitted: September 13‚ 2012 ------------------------------------------------- Abstract Carboxylic acid derivatives namely‚ acyl halides‚ acid anhydrides‚ esters and amides were classified through different reactivity tests. The samples used were acetyl chloride for acyl halide group‚ acetic anhydride for acid anhydride group‚ ethyl acetate for ester group‚ acetamide and benzamide for amide group. These derivatives were identified through the mechanism of hydrolysis‚ alcoholysis and aminolysis reactions
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on a C-C backbone tends to resist degradation‚ whereas heteroatom-containing polymer backbones confer biodegradability. Biodegradability can‚ therefore‚ be engineered into polymers by the judicious addition of chemical linkages such as anhydride‚ ester‚ or amide bonds‚ among others. The usual mechanism for degradation is by hydrolysis or enzymatic cleavage of the labile heteroatom bonds‚ resulting in a scission of the polymer backbone. Macroorganisms can eat and‚ sometimes‚ digest polymers‚ and also
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Tyre Recycling : The New Business on the Block Wednesday‚ 31 March 2010 00:00 Nimesh Sharma Opportunities - Manufacturing ------------------------------------------------- Top of Form User Rating: / 174 PoorBest Bottom of Form The number of vehicles hitting the roads is increasing everyday and so is the number of tyres. There is a business opportunity up for grabs and it’s in recycling them. With more than 33 million vehicles added to the Indian roads in last three years‚ can you guess
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