carbonyl values. Moreover‚ it was further supported by other complementary antioxidant assays such as ferric thiocyanate method in linoleic acid system‚ reducing power‚ chelating and scavenging effects on 1‚1 0 -diphenyl-2-picrylhydrazyl (DPPH) and hydroxyl radicals. In antimicrobial investigations‚ using inverted petriplate and food poison techniques‚ the leaf and bark volatile oils has been found to be highly effective against all the tested fungi except Aspergillus ochraceus. However‚ leaf oleoresin has
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hydroperoxide proceeds by a free radical chain reaction. A radical initiator abstracts a hydrogen‐free radical from the molecule‚ creating a tertiary free radical. The creation of the tertiary free radical is the initial step in the reaction. In the next step‚ the free radical is attracted to an oxygen molecule. This attraction produces the hydroperoxide free radical. Finally‚ the hydroperoxide free radical abstracts a hydrogen free radical from a second molecule of cumene
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Stratosphere Space Shuttle Endeavour appears to straddle the stratosphere and mesosphere in this photo. "The orange layer is the troposphere‚ where all of the weather and clouds which we typically watch and experience are generated and contained. This orange layer gives way to the whitish Stratosphere and then into the Mesosphere."[1] Atmosphere diagram showing stratosphere. The layers are to scale: from Earth’s surface to the top of the stratosphere (50km) is just under 1% of Earth’s radius
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consumed in reaction (ii) and again regenerated in reaction (iii). As a result of this chain reaction‚ one chlorine atom can destroy 100‚000 ozone molecules. The other agents responsible for the depletion of ozone are NO gas‚ oxygen radicals(O) and hydroxyl radicals(OH). The depletion of ozone layer will lead to the penetration of more and more UV radiations which results as skin cancer‚ blood cancer‚ cataracts‚ etc. and also cause harm to the plants and
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Objective: The purpose of this experiment was to prepare the Grignard reagent methylmagnesium iodide and react it with benzoin to form the 3o alcohol 1‚2-diphenyl-1‚2-propanediol‚ through an addition reaction pathway. Introduction: Grignard reagents are alkyl or aryl-magnesium halides that act as the nucleophile in Grignard reactions‚ where ketones are reacted with the reagent‚ then treated with acid to produce an alcohol. In the case of this experiment‚ methylmagnesium iodide was created
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Week 2 Quiz Which of these is NOT one of the four general categories of cells that make up the human body? collagen cells muscle cell neuron connective tissue cell epithelial cells What is the term for the developmental process that leads to specialized cell types? homeostasis differentiation positive feedback genomics acclimatization If a person begins to sweat upon entering a hot room but continued sweating is able to keep the body temperature constant‚ which of these best
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Food Chemistry: Option F Food Groups: F.1 Food & Nutrients Food: any substance‚ whether processed‚ semi-processed or raw‚ which is intended for human consumption‚ and includes drinks‚ chewing gum and any substance which has been used in the manufacture‚ preparation or treatment of “food” but does not include cosmetics or tobacco or substances used only as drugs. Nutrients: any substance obtained from food and used by the body to provide energy‚ to regulate growth‚ and to maintain and repair
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Phytochemical characterization & antioxidant activity of mangrove plant Sonneratia caseolaris Submitted by: Kumari Priyanka Regd no.-0901106090 Sem-7th‚ Biotechnology
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Dominic Vawdrey Aircraft systems essay Atmosphere The term atmosphere is described by Wikipedia as “An atmosphere (New Latin atmosphaera‚ created in the 17th century from Greek ἀτμός [atmos] "vapor" and σφαῖρα [sphaira] "sphere") is a layer of gases that may surround a material body of sufficient mass and that is held in place by the gravity of the body. An atmosphere may be retained for a longer duration‚ if the gravity is high and the atmosphere’s temperature is low. Some planets consist mainly
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J Polym Environ (2007) 15:25–33 DOI 10.1007/s10924-006-0042-3 ORIGINAL PAPER Chemical Treatments of Natural Fiber for Use in Natural Fiber-Reinforced Composites: A Review Xue Li Æ Lope G. Tabil Æ Satyanarayan Panigrahi Published online: 4 January 2007 Ó Springer Science+Business Media‚ LLC 2006 Abstract Studies on the use of natural fibers as replacement to man-made fiber in fiber-reinforced composites have increased and opened up further industrial possibilities. Natural fibers have
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