Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 267 for “"Anhydride"”.
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Asymmetric anhydride opening : optimization and applications
… the desymmetrization of easily accessible meso-anhydrides by cinchona alkaloid-mediated opening with benzyl alcohol. This procedure was found to be applicable to a variety of structurally different substrates and leads to the corresponding optically active hemiesters with enantioselectivities of …
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The copolymerization of styrene and itaconic anhydride
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science. Dept. of Chemistry, 1958
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The reaction of sodium on acetic anhydride
… out the reaction between sodium and acetic anhydride have been presented. Separation of reaction products and quantitative determination have been made easier by means of the improvements. 2. The only products isolated from either room-temperature or high-temperature runs have been sodium …
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The reaction of sodium on acetic anhydride
… conditions for the reaction of sodium on acetic anhydride were used. 2. From the products of this reaction sodium acetate, diacetyl, and resin were found. 3. Negative results for the formation of vinyl acetate and ethylidene diacetate were obtained. 4. The small amount of hydrogen produced in …
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New Applications for Poly(ethylene-alt-maleic anhydride)
… of an understanding of poly(ethylene-alt-maleic anhydride) in terms of both its physical behaviour and chemistry. Chapter one involves a thorough and rigorous characterisation of the polymer, and three principle things are established: the polymer is structurally uniform, reacts in a predictable …
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Towards the Synthesis of Novel Linseed Oil Based Anhydride Compounds
This thesis describes the synthesis of a novel anhydride that could theoretically be used to strengthen cellulose fibres in terms of their water resistance for potential use as a potential green replacement for fibreglass. The first chapter, the introduction, is split into 3 parts which are the 3 …
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Preparation of emulsifiers from pea and corn starches using octenyl succinic anhydride modification
… pulse starch – using octenyl succinic anhydride (OSA) to prepare emulsifiers for enhanced industrial utilization. Pea starch (PS), normal corn starch (NCS), and waxy corn starch (WCS) were modified with 1%, 3% and 5% OSA (w/w, on a dry basis of starch, db). Native PS consisted of more …
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Surface Characterization of Siloxane, Silsesquioxane, and Maleic Anhydride Containing Polymers at Air/Liquid Interfaces
… affinity.Several poly(1-alkene-alt-maleic anhydride) (PXcMA) polymers were studied at both the gas/liquid interface as Langmuir films and at the gas/solid interface as Langmuir-Blodgett thin films on silicon substrates. A 0.01 M HCl solution (pH~2) was used during film deposition to ensure …
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Correlation of physical and chemical properties of anhydride-cured epoxy resins with theoretical structure
The structure of alicyclic dicarboxylic anhydrides was found to have a significant effect on the final physical and chemical properties of a cured epoxidized novolac resin, and the final properties of a cured system can be predicted with reasonable accuracy from the theoretical structure. …
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Preparation and structure of Octenyl succinic anhydride modified waxy maize starch, microporous starch and maltodextrin
Octenyl succinic anhydride (OSA) modified starch is widely used in emulsion and encapsulation applications. The functionality of OS starch depends on its molecular structure. A systematic study was performed to investigate the reaction of OSA with granular waxy maize (WM) starch, microporous WM …
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Thiomaleic anhydride: a linchpin for organic synthesis and structural verification of a nonprotein antifreeze oligosaccharide
… develops the utility of α,β-unsaturated monothioanhydrides as a linchpins in multicomponent coupling reactions by processes involving addition to the double bond, cyclization onto the anhydride, and finally exploitation of the rich chemistry of the thioacid liberated in the cyclization. The …
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Effect of ethyl oleate and oleic anhydride on metronidazole release from poly(ortho esters) films
… 1.5 and 2.25% w/w) of ethyl oleate or oleic anhydride, the latentiated forms of catalyst oleic acid, were compared with regard to the release characteristics of metronidazole (1 0% w/w) from poly( ortho esters) films in distilled water at 3 7 °C. The rate of release of metronidazole from …
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Investigation of Enhancement of Furosemide Solubilization with Cyclodextrins and a Novel Octenyl Succinate Anhydride Starch
<p>Solubility behavior is one of the most challenging aspects for drug commercialization and often the main reason of drug that do not reach to its full potential. Now nearly 60% new chemical entities possess solubility problems, whereas practically no drug products with less than 10 µg/ml …
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Synthesis and Polymerization of Substituted Stilbenes with Maleic Anhydride for Membrane Solubilization and Protein Extraction
… SMA2000—a commercially available styrene-maleic anhydride copolymer with a 2:1 styrene to maleic anhydride ratio—has demonstrated broad utility in the isolation and subsequent characterization of a wide range of integral membrane proteins. However, there are some limitations to the use of SMA2000 …
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A kinetic study of the reaction between acetic anhydride and isobutyl alcohol using a chemical oscillometer
… the base catalyzed reaction of acetic anhydride and isobutyl alcohol reacting to form acetic acid and isobutyl acetate. In this investigation, a high frequency oscillometer is used to observe the progress of the reaction as it proceeds to the formation of products.</p><p>The chemical …
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