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 109 for “"Benzaldehyde"”.
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Chemical and physical stability of spray-dried and glass encapsulated spray-dried flavors stored below their glass transition temperatures
… for shelf-life extension of MET flavors. One benzaldehyde SD flavor and two MET materials, isomalt (ISO) and evaporated cane juice (ECJ), were used as model systems. Samples were packaged in individual aluminum pouches and sealed in the presence of air to allow for possible oxidation of …
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Copolymerization of a P-Vinylbenzyl-Ended Poly(Oxyethylene) With Vinyl Monomers and Some Reactions of Poly(Oxyethylene) Derivatives
… p-vinylbenzyl chloride, and 4-(4-vinylbenzyloxy) benzaldehyde using 2,2,6,6-tetramethyl-1-piperidinyloxyl (TEMPO) and dibenzoyl peroxide as the initiating system. The copolymers made in this work have been characterized by NMR, IR, and gel permeation chromatography (GPC). It is shown that the …
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Biocompatible polymeric nanoparticles for drug/DNA delivery using biologically friendly polymerisation processes
… 4 highlights the formation of amphiphilic benzaldehyde-functionalised polymer nanoparticles using polymerisation induced self-assembly (PISA) alongside RAFT in aqueous conditions. Cross-linking of benzaldehyde-functionalised polymer micelles is explored through addition of an aminooxy …
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Intermediate compounds in the synthesis of lignin
… of a keto-aldehyde from salicylaldehyde and benzaldehyde was attempted. The first step was to protect the carbonyl with a non-reactive group.</p><p>The bisulfite addition product and the 2,4-dinitrophenylhydrazone of salicylaldehyde were prepared. The methyl acetal, the sodium bisulfite …
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Chemistry with chiral lithium amides: enantiotopic group and face-selective reactions
… of 1,4-cyclohexanedione monoethylene ketal and benzaldehyde demonstrated the high diastereoselectivity (up to 98% de) and the moderate to high enantioselectivity (up to 75% ee) induced by those chiral lithium amides. On the other hand, high diastereoselectivity (up to 100% de) and the low …
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Charakterisierung und Anwendung eines gelstabilisierten Zweiphasensystems für die asymmetrische Synthese neuartiger Benzoine mit immobilisierter Benzaldehydlyase
… relevant (R)-benzoins catalyzed by the benzaldehyde lyase is almost exclusively described for aqueous monophasic systems. In such systems the number of convertible hydrophobic substrates is limited, the turn over number is partly unsatisfactory and additives which are commonly used for …
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The study of aldol condensation of ketones using zoelites as catalysts
… condensation reactions of acetone and benzaldehyde were also performed.
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Ice Concentration Linked with Extractive Stirrer (ICECLES)
… the performance of ICECLES were evaluated using benzaldehyde, such as the initial concentration, stir speed and freeze rate. Extraction at low speeds resulted in higher extraction efficiency. However, the freeze rate and initial concentrations had a minor effect on ICECLES extraction efficiency. …
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The photo-oxidation of benzyl alcohol over TiO2 and Pt TiO2 and the effect of reaction conditions
The fine chemical benzaldehyde is commonly produced by the oxidation of benzyl alcohol (B-Alc) using stoichiometric amounts of hazardous oxidants such as chromates. The selective, photocatalytic oxidation of benzyl alcohol offers a promising, more environmentally friendly method of producing …
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Microbial engineering for aldehyde synthesis
… a model E. coli host strain, we demonstrate that benzaldehyde accumulation occurs upon deletion of a combination of genes encoding enzymes known to have benzaldehyde reductase activity in vitro. Using deletion subset studies and quantitative real-time PCR, we discover that deletion of many, but …
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Synthesis and biological evaluation of polynuclear cyclometalated ruthenium, rhodium and iridium complexes based on a PPI dendritic scaffold
… the relevant amine and either naphthaldehyde or benzaldehyde. These reactions yielded air- and moisture-stable solids or oils. These compounds were isolated in good yields and characterized using standard spectroscopic and analytical techniques.
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Synthesis and characterisation of palladium, platinum and gold complexes and their biological activity against oesophageal cancer cell lines
… from the condensation of N-(2-(diphenylphosphino)benzaldehyde with the appropriate amine. A series of new metal complexes (Pd, Pt and Au) were obtained by coordination of the iminophosphine ligands in good yields. The complexes were characterised using the spectroscopic and analytical techniques …
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The Kinetic Resolution of Secondary Alcohols Through A Tandem Enantioselective Silylation and the Synthesis of Bis(Oxazolidinyl)Pyridine Metal-Organic Complexes
… when the addition of a silyl ketene acetyl to benzaldehyde is catalyzed with our bi-functional catalyst, the reaction proceeds through a two step tandem process. The first step involves racemic carbon-carbon bond formation to generate a pair of alkoxide diastereomers. The second step involves a …
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Oxidation of Organic Compounds in Molten Salts
… Ethanol, 2-propanol, benzyl alcohol, and benzaldehyde were oxidized by Mn(VI) and Mn(VII); toluene was only oxidized by Mn(VII), and n-hexane, cyclohexane, and ethene were unchanged by both Mn(VI) and Mn(VII). Detailed experiments have been performed on the reactions of 2-propanol, benzyl …
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Preparation of thiochalcone from thioacetophenone
… on the condensation of thioacetophenone with benzaldehyde and the library research covers the chemistry of thioketones and the thioflavanones. Most of the thioketones have been made by dissolving a ketone in ethanol, usually absolute although 95 percent was also used, saturating the solution …
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