"Dimethyl maleate isomerization to dimethyl fumarate" Essays and Research Papers

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    Medication and Treatment for COPD Inhaled Therapies NICE COPD guidelines have made specific recommendations regarding the use of inhaled long-acting bronchodilators and inhaled steroids separately and in combination‚ but newer studies have assessed these drugs singly and in combination over longer periods of time. Bronchodilators (relievers) Short-acting beta2 agonists (SABA) Beta2 agonists act directly on bronchial smooth muscle to cause bronchodilation. They are the most widely used bronchodilators

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    Abstract: Need for the study: Oral precancerous lesions are one of the most prevalent lesions worldwide today. Leukoplakia is the commonest premalignant lesion ‚ which if neglected can be fatal. Several therapeutic agents have been tried to intervene. Of which‚ Lycopene has been tried‚ tested and accepted as a conventional form of treating leukoplakia. Curcumin‚ 1‚7-bis-(4-hydroxy-3-methoxyphenyl)-1‚6- heptadiene-3‚5-dione] is regarded as the most biologically active constituent of the spice turmeric

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    ALKYNES

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    Chapter 7 Triple Bond Structure Nomenclature  IUPAC: use the infix -yn- to show the presence of a carbon-carbon triple bond 4 3 2 1 2 3 4 6 7 5 1 2 3 4 6 7 5 1 3-Methyl-1-butyne 6‚6-Dimethyl-3-heptyne 1‚6-Heptadiyne  Common names: prefix the substituents on the triple bond to the name “acetylene” IUPAC name: Common name: 2-Butyne D imethylacetylene 1-Buten-3-yne Vinylacetylene  Physical Properties Similar to

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    Alkane‚ Alkene‚ Alkyne & Aromatic Learning Objectives 1. 2. 3. Determine the IUPAC name‚ common name and structure of an alkanes‚ alkenes and cycloalkanes. Identify the physical properties of alkanes. Describe briefly natural sources and importance of alkanes Describe reactions of alkanes Propose a mechanism on free radicals substitution 4. 5. 6. Describe the preparation and reactions of alkenes. 7. Propose mechanism on preparation; dehydration of alcohol 8. Define carbocation

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    Fundamentals of Polymer

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    1 Introduction 1.1 DEFINING POLYMERS Polymers are materials of very high molecular weight that are found to have multifarious applications in our modern society. They usually consist of several structural units bound together by covalent bonds [1‚2]. For example‚ polyethylene is a long-chain polymer and is represented by ÀCH2 CH2 CH2 À or ½ÀCH2 CH2 ÀŠn ð1:1:1Þ where the structural (or repeat) unit is ÀCH2ÀCH2À and n represents the chain length of the polymer. Polymers are

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    Effects of Citric Acid on the Viscoelasticity of Cornstarch Pastes MADOKA HIRASHIMA‚ RHEO TAKAHASHI‚ AND KATSUYOSHI NISHINARI* Department of Food and Human Health Sciences‚ Graduate School of Human Life Science‚ Osaka City University‚ Sumiyoshi‚ Osaka 558-8585‚ Japan The effects of citric acid on the rheological properties of cornstarch pastes were studied by steady shear and dynamic oscillatory viscoelasticity‚ intrinsic viscosity measurements and microscopic observation. The pH of cornstarch

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    Omeprazole

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    Omeprazole is an off white coloured crystalline powder which is freely soluble in ethanol‚ methanol and partially soluble in water. The active ingredient comes from a chemical class named benzimidazole and is broken down as: 5-methoxy-2-[[(4-methoxy-3‚ 5-dimethyl-2-pyridinyl) methyl] sulfinyl]-1H- benzimidazole‚ this compound inhibits gastric secretion. The empirical formula of Omeprazole is C17H19N3O3S‚ it has a molecular weight of 345.42 and has a structural formula displayed below: [pic](Rxlist.com‚

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    Tyjh

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    SEMI – MICRO QUALITATIVE ANALYSIS OF SIMPLE INORGANIC SALT _______________________________________________________________ CATIONS: Pb2+ ‚Hg2+ ‚Cu2+ ‚Cd2+ ‚ Ag+ ‚ Fe2+ ‚ Fe3+ ‚ Al3+ ‚ Zn2+ ‚ Mn2+ ‚ Co2+ ‚ Sr2+ ‚ Ba2+ ‚ Mg2+ ‚ NH4+ ANIONS: CO32- ‚ S2- ‚ SO32- ‚ SO42- ‚ NO2- ‚ NO3- ‚ Cl- ‚ Br2- ‚ PO43- ‚ CH3COO- _______________________________________________________________ PRELIMINARY TESTS 1. Note the state (amorphous or crystalline) and colour of salt. 2. Test the solubility of the salt in

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    A Basic Guide to Cosmetic & Toiletry Development John Woodruff john.woodruff@creative-developments.co.uk 1 A Basic Guide to Formulating Cosmetics & Toiletries What is a cosmetic? Understanding product briefs From concept to product formulation Sources of information EU cosmetic regulations The global marketplace Cost effective formulation Product stability & preservation Example formulation techniques john.woodruff@creative-developments.co.uk 2 A Basic Guide to Formulating

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    Introduction The atmosphere is considered as a great cover that guards the earth’s surface from the full solar radiations during daytime and prevents excessive losses of heat during nighttime. The atmosphere provides a sustaining livable temperature on the planet by maintaining the heat balance of the earth. However‚ humans disregard the atmosphere through activities that contribute in polluting the surrounding. In order to prevent and minimize the air pollution‚ it is essential to understand the

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