treatment with caustic soda‚ embossing‚ or weaving (usually with thickerwarp yarns and thinner filling yarns). Although crepe is traditionally woven‚ crepeyarns are now used to produce knit crepes. SATIN One of the basic weaves. A shiny‚ smooth silk‚ acetate‚ rayon‚ or other man-made fiber combination woven in satin weave made with a cotton filling. It has a smooth‚ lustrous surface because the warp floats. It is used for linings of coats‚ jackets‚ facings‚ and ties. It is also used for draperies‚ upholstery
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Mechanism: Side Reaction: Experimental: Table of Chemicals: Cyclopentadiene Maleic Anhydride Ethyl Acetate Hexane 66.10 g/mol 98.06 g/mol 88.11 g/mol 86.18 g/mol MP: -90º C BP: 39-43º C MP: 52.8º C BP: 202º C MP: -83.6º C BP: 77.1º C MP: -96--94º C BP: 68-69º C Cyclopenta-1‚3-diene Furan-2‚5-diene Ethyl Acetate Hexane Results: The crystals obtained through the Diels-Alder reaction were not plate-like‚ as were expected. We obtained
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rotundus was evaluated for its hepatoprotective activity in rats by inducing liver damage with carbon tetrachloride. The ethyl acetate extract which was administered orally at a dose of 100 mg/kg exhibited significant protective effect by lowering serum levels of the liver enzymes such as alanine aminotransferase (ALT or SGPT)‚ aspartate aminotransferase (AST or SGOT)‚ alkaline phosphatase
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OF ASPIRIN MARAVILLA‚ Ana Mikaela B Group 4 CHEM 40.1 1L Date performed: September 30‚ 2013 Date submitted: October 7‚ 2013 VI. RESULTS AND DISCUSSION Aspirin is prepared by the esterification of salicylic acid with acetic anhydride under acidic conditions. The phenol group in salicylic acid is replaced by a carboxyl group through electrophilic substitution. The mechanism for the reaction can be summarized as follows: Figure 11
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boiling points of two different substances are very different. Fractional distillation is the separation of a mixture of multiple components into its various fractions according to the difference in their boiling temperatures. a.) Hexyl acetate and butyl acetate- Simple distillation should be used for these two compounds because their boiling points are very different. b.) Hexanol and cyclopentanol- Fractional distillation should be used because there is a small difference of boiling points between
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mL iodine flask. To the oil in the iodine flask‚ add 10 mL of dichloromethane acting as a solvent and mix by swirling gently. Add 20 mL of iodine monochloride solution from a burette and mix. Then add about 5 mL of a 2.5% solution of mercuric acetate in glacial acetic acid‚ which will act to catalyse the reaction. Insert the stopper which has been previously moistened with a solution of potassium iodide. Keep in a dark place for 3 minutes to allow the unsaturated fatty acid residues of the
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bottom and sides of the flask so a spatula will probably be needed to scrape them out. Washing the flask and crystals with ice- cold xylenes completes this process. The resulting dried product was recrystalized using hot ethyl acetate. A hot plate was used to boil ethyl acetate to be poured into a heating beaker with a mixture of EtoAc and adduct until the product dissolved. A sequential suction filtration completed this
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Over 9‚097‚000 live tutoring sessions served! Sales Toll Free No: 1-866-617-6020 Home How it works About Us Top of Form Bottom of Form Home BiologyNervous Coordination and Integration in Animals Top Mechanism of Vision The eye works on the same principle as that of the camera. The light rays from the object pass through the conjuctiva‚ cornea‚ aqueous humour‚ lens and vitreous humour in that order. All these structures refract the light such that it falls on the retina. This
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the temperature below 100 ℃‚ add 40% of the Miscella (an) oil solvent mixture‚ oil continuously through the catalyst (ni)‚ also can complete hydrogenation process.In the oil there are only a small amount of oleic acid‚ the oil quality improved. Esterification: the process is in 95 ~ 135 ℃ heating temperature about 2 hours‚ can also be used in catalyst (0.1% ~ 0.5% sodium methanol or
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precipitate accumulated at the top and also the bottom of the solution. The solution was thin. NaOH No precipitate seen‚ the solution was cream in color. Copper sulphate Light blue coagulated precipitate seen at the top of the solution. Lead Acetate Cloudy solution with small specks of white precipitate. Ice cold ethanol Cloudy at the bottom and about 0.5 cm of the top of the solution was clear. Table 4: The results of Gel Filtration Chromatography Eluate Component Volume collected
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