Classification Tests for Carboxylic Acid and Derivatives Mary Catherine Sarte‚ John Emmanuel Sy‚ Allurie Umel‚Franklin Yap‚ Mary Christine YouIntroduction Carboxylic acids derivatives are simply groupsof compounds that contain a carbonyl group butwith an electronegative atom attached to thecarbon. The difference in the structure leads to amajor change in reactivity. The reactions of thesegroups of compounds involve nucleophilicsubstitution. Although there are abundant kindsof carboxylic acid derivatives
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and ester formed. Hypothesis For test tube A I hypothesized that the final ester would be 2-methylpropyl formate. For test tube B I hypothesized the final ester would be octyl acetate. For test tube C I hypothesized it would be methyl salicylate. For test tube D I hypothesized it would be isopentyl acetate. Materials and Methods Apparatus 4 test tubes Test tube rack Graduated cylinder (10 mL) 150 mL beaker 250 mL beakers (2) Hot plate Thermometer Safety glasses Beaker tongs
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243a Matt Judd‚ Sec. 25 Date Performed: 10/15/03 Abstract: The objective of this experiment is to efficiently perform a fischer esterification of 1-Hexanol to form water and hexyl acetate‚ and to confirm the esterification with a nuclear magnetic resonance (NMR) spectroscopy. It was found that 0.3963 grams hexyl acetate was formed with a percent yield of 33.2%. The product was confirmed using NMR‚ IR‚ and boiling point confirmation. Backround: A Fischer Esterification is the formation of an ester
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Biological investigation of Arum palaestinum 6.1. Antioxidant activity The antioxidant activity of the ethyl acetate fraction of A. palaestinum characterized by its strong DPPH free radical scavenging activity (SC50 3.1 ±0.82 μg/mL) [4]. Both of the aqueous and ethanol extracts had remarkable antioxidant activities about 43.1‚ 12.7%‚ respectively [39]. Recently
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e. 50- 500 μg/ml‚( each of these concentration was taken in duplicate) was mixed with 1800 μl of ABTS solution was mixed with it for each concentration. Similar process was repeated for ascorbic acid concentration. All test tubes (ethyl acetate soluble fraction‚ ethyl-3-hydroxy-5-methoxy-4-methylbenzoate‚ ascorbic acid‚) labeled separately were shaken well and incubated in the dark at 25oC for 30 minutes. Then the Kinetic absorbance was recorded at 734 nm by spectrophotometer after 1 and 6 minutes
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and stirrer were then set to 7.0 and turned on. The batch reactor was started to ensure the conductivity probe was functional and the reading was displayed on the PC. 500mL of ethyl acetate was then added to the reactor‚ which was maintained at approximately thirty degrees Celsius by a water bath. As soon as the ethyl acetate was added‚ the conductivity and temperature were measured at two minute intervals until the conductivity plateaued‚ indicating the point of maximum conversion for the reaction
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Scent-Infused Textiles consumer acceptance of fragrance-embedded textiles. Consumer willingness of finished products. The Sensory Perception Technologies (SPT) allows textile producers to weave particles of moisturisers‚ deodorants‚ fragrances and even anti-tobacco agents into fabrics. "Early trials have proved SPT a success with many global clothing companies interested‚" ICI‚ whose fragrances unit Quest developed the technology. ICI said the technology allows fabric makers to incorporate tiny
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Laboratory #6 Qualitative Tests for Carbonyls: Aldehydes vs. Ketones Introduction Various chemical tests identifying ketones and aldehydes are used in this experiment in order to identify an unknown carbonyl compound. The tests used are: 2‚4-dinitrophenylhydrazone test‚ Tollen’s Test‚ Benedict’s Test‚ Chromic Acid Test‚ aka Bordwell-Wellman Test‚ Schiff’s Test‚ and Iodoform Test. These classification tests provide results based on color change or formation of precipitation‚ which is then used
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Biological Activities of Paris polyphylla found in Himalayan Region of Nepal Prabin Koirala‚ Khagesh Chataut and Keshab Bhattarai Department of Biotechnology‚ WhiteHouse Institute of Science and Technology‚ Purbanchal University‚ Lalitpur‚ Nepal. e-mail: prabinkoirala122@gmail.com Abstract The study focused on phytochemical and biological analysis of Paris polyphylla (PP). Crude Chloroform/Methanol (1:1) extraction performed on the rhizomes of Paris polyphylla collected from himalayan region
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CHEM3412 Synthesis of a Porphyrin Porphyrins are hetereonuclear‚ macrocyclic compounds that play an important role in living organisms. Examples include the non-protein heme portion of hemoglobin in animals whereby the lone pairs on nitrogen can bind to the oxygen-carrying iron. In plants‚ chlorophyll uses the vast conjugation to allow absorption of light for photosynthesis. The characteristic colors of porphyrins is also due to the conjugation. An examination of the porphyrin structure
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