040 grams0.256 grams X 100 % Recovery= 0.16 x 100=16% There are many reasons why the percent recovery is much less than 100%. For example‚ one source of error may have been that the separatory funnel containing the acidified phenylalanine and ethyl acetate may not have separated well enough after being shaken together in the funnel. Not allowing an adequate amount of time for the aqueous and organic layers to separate will cause portions of the layers to be contaminated. This would affect the experimental
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Bacterial Fermentation Secondary article Article Contents Volker Mu¨ller‚ Ludwig-Maximilians-Universita¨t Mu¨nchen‚ Munich‚ Germany . Introduction Under anaerobic conditions‚ in the dark and in the absence of electron acceptors‚ organic compounds are catabolized by strictly anaerobic or facultatively anaerobic bacteria by internally balanced oxidation–reduction reactions‚ a process called fermentation. In fermentation‚ the organic compound serves as both electron donor and acceptor‚ and adenosine
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toothache. The tea is used to relieve nausea. In Chinese medicine the oil is used for diarrhoea‚ hernia‚ bad breath and bronchitis as well as for those conditions mentioned above. Extraction Essential oil by water distillation from 1. the buds and 2. the leaves and by steam distillation from 3. the stalks or stems. A concrete‚ absolute and oleoresin are also produced from the buds in small quantities. Characteristics and Constituents 1. Clove bud is a pale yellow liquid with a sweet - spicy
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Mapua Institute of Technology Organic Chemistry Laboratory 2 Final Report Factors Affecting the Relative Rates of Electrophilic Aromatic Substitution Reaction Justiniano‚ Priscilla Raiza N. School of Chemical Engineering and Chemistry‚ Mapua Institute of Technology‚ Intramuros‚ Manila‚ Philippines Experiment No.1‚ Submitted on August 6‚ 2011 at N402. Abstract EXPERIMENT NUMBER ONE IS ALL ABOUT THE ELECTROPHILIC SUBSTITUTION OF AROMATIC COMPOUNDS. AROMATIC COMPOUNDS ARE THOSE ORGANIC
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Comparative Investigation of Organic Compounds Tristan Duane G. Lacson‚ Lara Elize T. Lamigo‚ Maria Mikaela L. Laysa‚ Christian Gerard G. Lee and Karen L. Li Group 6 2C Pharmacy Organic Chemistry Laboratory ABSTRACT In order to differentiate the organic compounds. The group tested the compounds using the information based on their instinsic physical properties‚ behavior in ignition‚acidity and basicity and their infrared spectra. The physical properties were noted by the reaserchers by
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Chromatography – Analyzing Analgesics by TLC and Isolation of β-Carotene by Column Chromatography Introduction/Background: Flavonoids are an important group of additives that can be defined as pure substances either natural‚ extracted from raw materials or synthetic. Chromatography is the separation of two or more compounds or ions caused by their molecular interactions with two phases – one moving and one stationary (Weldegirma 2012). Three types of chromatography are used
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separate the mixture of individual compounds from the spinach leaf sample used. Material and apparatus: Part 1 : Analysis of Analgesic Drugs Material: Aspirin Acetaminophen Caffeine Unknown A Unknown B TLC plates Ethyl acetate Hexane Acetic acid Iodine Apparatus: UV Lamp Capillary tube 250mL beaker Filter paper
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Department of Food Science and Technology‚ Faculty of Agriculture‚ AL-Azhar University‚ Cairo‚ Egypt Abstract: This work aimed to evaluate the efficiency of different organic solvents such as‚ methanol‚ ethanol‚ dichloromethane‚ acetone‚ hexane and ethyl acetate for extraction of ( flavonoids and polyphenolic compounds(TFC and TPC respectively) from the orange peel. Also‚ the effect of these solvents on the yield percentage‚ chelating activity‚ antioxidant/radical scavenging capacity and reducing power
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pigments were separated and concentrated from a crude spinach extract through the use of column chromatography and an eluatropic series of hexanes‚ hexane/acetone‚ and methanol. The pigments were analyzed using thin layer chromatography with a 30% ethyl acetate/hexane developing solvent. Introduction: Chromatography is a technique used to separate a mixture of two or more components based on differences in their physical properties. It can be used as a method of purification (and can be used on
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EFFECTS OF VOLATILE ORGANIC COMPOUNDS (10244818) Volatile organic compounds (VOCs) are organic chemical compounds that have high enough vapor pressures under normal conditions to significantly vaporize and enter the atmosphere. According to EPA ’s Terms of the Environment‚ a volatile organic compound is "any organic compound that participates in atmospheric photochemical reactions except those designated by EPA as having negligible photochemical reactivity." VOC can also stand for the term “volatile
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