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 395 for “"Aldehydes"”.
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Monoaromatic hydrocarbons and aldehydes in Las Vegas air
… of the monoaromatic hydrocarbons and aldehydes show significant correlations within the various monoaromatic hydrocarbons, and within the various aldehydes as well as between the two groups of compounds. Moderate or good correlations between observed concentrations of target analytes, …
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Synthesis of Protected Amino Alcohols and Amino Aldehydes.
… and leupeptin, naturally occurring peptide aldehydes, have been shown to be of possible therapeutic value in treatment of MD. The cost of these compounds, however, has made large scale clinical studies impossible. The purpose of this work was to develop a general synthesis of protected amino …
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Studies of Aldehydes in an Atmosphere Simulation Chamber
Im Zuge dieser Arbeit wurde ein DOAS-Instrument an der Atmosphären-Simulationskammer SAPHIR (Forschungszentrum Jülich) aufgebaut, das auf einem Vielfach-Reflektionssystem des White-Designs basiert. Das DOAS-Instrument ermöglichte erstmalig den Nachweis von NO3 an der Kammer. Ein NO3- Verlustprozess …
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Investigation of montmorillonite clay-mediated reactions of aldehydes
… heterogeneous catalysts for several reactions of aldehydes: (1) the hetero-Diels-Alder reaction of aromatic aldehydes with 2,3-dimethyl-1,3-butadiene to give dihydropyran products; (2) the cyclotrimerization of aliphatic aldehydes; (3) the oxidation of aliphatic aldehydes to the corresponding …
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The Enzymatic Oxidation of Aldehydes by Xanthine Oxidase
As early as sixty years ago, the existence of an enzyme from mammalian tissues which catalyzed the oxidation of xanthine and hypoxanthine was recognized. The name given the enzyme was derived from its earliest recognized action, hence xanthine oxidase. Although little is known about the biological …
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Free Radical Rearrangements in the Decarbonylation of Aldehydes
Made available in DSpace on 2014-12-05T19:36:12Z (GMT). No. of bitstreams: 1 0013505.pdf: 7451229 bytes, checksum: 610e313513b5f10a398fa2c0d35e9287 (MD5) Previous issue date: 1955
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Preparation and reactions of some orthomanganated ketones, amides and aldehydes
… and are the first examples of orthomanganated aldehydes. 2-thiophenecarboxaldehyde and 3-thiophenecarboxaldehyde gave analogous 3-metalated and 2-metalated aldehyde products. Two new dimetalated arenes, η²,η²-(2,4-diacetylphenyl)bis-1,5- (tetracarbonyl)manganese (25) and …
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Dielectric studies of aldehyde group relaxation in some aromatic aldehydes
… made of a1dehyde group relaxation of aromatic aldehydes in a polystyrene matrix. For aldehyde group relaxation in terephtha1dehyde, the Eyring parameters are 6H -1 E = 29.3 kJ mol and 6S -1 -1 E = 15.1 JK mol • We found that changing the medium from polystyrene to polypropylene or polyethylene …
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A scheme for the identification of phenolic compounds and aldehydes
Thesis (M.A.)--Boston University
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Quantitative Studies of the Decarbonylation of Aliphatic and Bridgehead Aldehydes
Made available in DSpace on 2014-12-09T17:35:04Z (GMT). No. of bitstreams: 1 6503609.pdf: 5251458 bytes, checksum: 9a68a0182632adfcaa63bc6c748f82ae (MD5) Previous issue date: 1964
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Carbonyl ylide cycloadditions of dicobalt carbonyl complexes of propargylic aldehydes
… the scope of this process to include propargylic aldehydes (2-alkynals). The cluster not only increases the rate of reaction for this class of aldehydes, but also leads to a complete reversal in the diastereoselectivity compared to related methods and favors the exclusive formation of a 2,5- cis …
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Catalytic asymmetric addition of organozinc reagents to aldehydes and ketones
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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Reactions of acetylene and its derivatives with aldehydes and ketones
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1940.
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Activity-based sensors for reactive aldehydes and their corresponding enzymatic machinery
… activity-based sensors for reactive biological aldehydes and the enzymatic machinery tasked with aldehyde metabolism. We first developed AlDeSense, the first turn on fluorescent probe selective for aldehyde dehydrogenase (ALDH) 1A1. We pursued a probe for this enzyme since it’s frequently cited …
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