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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 697 for “"Carbohydrates"”.
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Chromatographic Separation of Carbohydrates
The general theories of chromatography are reviewed. Also the theories concerning the chromatographic separation of sugar mixtures are presented and examples of industrial applications reported. The general performance of zeolites, anion and cation exchange resins for the separation of carbohydrate …
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The total synthesis of carbohydrates
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1987.
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The Utilization of Low-grade Carbohydrates
This thesis is concerned with the application of fermentation technology to the production of useful materials from a class of carbohydrate resources presently under-utilized and even wasted. The use of both carbohydrate-containing crops and processing wastes as fermentation substrates was …
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Structural Analysis of Carbohydrates by Mass Spectrometry
… is a powerful tool for structural analysis of carbohydrates with its high sensitivity and selectivity. MS2 (two-stage tandem mass spectrometry) is most often adopted due to the wide availability of commercial instruments; however, glycan structural determination typically stops at the level of …
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Carbohydrates in Soybeans (Glycine Max (L.) Merrill)
Made available in DSpace on 2014-12-12T00:17:42Z (GMT). No. of bitstreams: 1 7114800.pdf: 2800688 bytes, checksum: df4cf18c6a289c99df1f2e6bb08ab265 (MD5) Previous issue date: 1970
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Structural characterization and bacterial degradation of marine carbohydrates
… magnetic resonance spectroscopy (NMR). Two carbohydrates from Synechococcus WH7335 were characterized in detail. Synechococcus produced an α(1,4) glucose polysaccharide with α(1,6) branches, which probably functions as an energy reserve. The nominal molecular weight of the polysaccharide was …
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Molecular studies of organometallic carbohydrates and related compounds.
… the solid and solution state. Five stannylated carbohydrates were studied (three pyranose and two furanose compounds). l,2;3,4-di-O-isopropylidene-6-O-triphenylstannylmethyl-alpha-D-galactopyranose shows the tin in a distorted tetrahedral environment and the pyranose ring in a twist-boat …
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Transformation of biomass carbohydrates by transition metal catalysts
… removing functional groups from biomass derived carbohydrates, valuable platform chemicals can be generated from renewable sources. Through dehydration chemistry glucose can be upgraded into 5-(Hydroxymethyl)-2-furfuraldehyde (HMF) and levulinic acid. Iron (III) chloride hexahydrate has shown …
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Toward the automated synthesis of carbohydrates and glycosaminoglycans
Glycosaminoglycans are crucial components of the extracellular matrix and cell surface and access to define sequences is required to fully appreciate their role in biology. As is the case with most complex polysaccharides, the chemical synthesis of glycosaminoglycan structures is challenging. This …
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Development of novel analytical tools for complex carbohydrates
Complex carbohydrates such as the heparin/heparan sulfate glycosaminoglycans (HSGAGs) and the asparagine linked glycans (N-glycans) have emerged as crucial components of many human biological systems. Both classes of molecules have diverse roles in normal and pathological processes including …
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Structural characterization and bacterial degradation of marine carbohydrates
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1993.
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Nucleophilic displacement reactions of some carbohydrates in dimethyl sulphoxide
Several 5-0-toluene-p-sulphonyl and 5-iodo derivatives of «-and 3-ribofuranoses and «-xylofuranose have been prepared in order to study their reactions with sodium hydrogen carbonate in dimethyl sulphoxide. Similar reactions are known to convert acylic primary sulphonates and iodides to aldehydes …
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Nucleophilic displacement reactions of some carbohydrates in dimethyl sulphoxide
Several 5-0-toluene-p-sulphonyl and 5-iodo derivatives of «-and 3-ribofuranoses and «-xylofuranose have been prepared in order to study their reactions with sodium hydrogen carbonate in dimethyl sulphoxide. Similar reactions are known to convert acylic primary sulphonates and iodides to aldehydes …
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Aspects of the biogeochemistry of carbohydrates in aquatic environments
… is to examine the distribution and diagenesis of carbohydrates in aquatic environments. The following questions are studied: what is the carbohydrate composition of sediment in different environments (e.g., deep-sea oxic; shallow-sea oxic; deep-sea anoxic; fresh-water anoxic; brackish-water …
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Synthetic methodologies toward the functionalization of benzhydrols and carbohydrates
… the direct azidation of benzhydryl alcohols and carbohydrates to afford diarylazidomethane analogues and glycosyl azides. In this work, reaction conditions were optimised to afford the targeted azide products in high yields. The use of non-explosive azidotrimethylsilane under Brønsted acid …
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Metabolism of host-derived carbohydrates by Bifidobacterium breve UCC2003
… has previously been shown to utilise numerous carbohydrates of plant origin. Various aspects of host-derived carbohydrate metabolism occurring in this bacterium will be described in this thesis. Chapter II describes B. breve UCC2003 utilisation of sialic acid, a nine-carbon monosaccharide, …
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The Utilization of Dietary Carbohydrates by Trout and Carp
… over 75%. Carp could tolerate higher levels of carbohydrates and less protein than trout. The 45% cassava, rice or dextrin, or 30% corn led to the best weight gain and food utilization in carp. Apparent digestibility of most of the carbohydrates was over 80%. Dietary carbohydrate did not seem to …
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The Separation of Carbohydrates by Continuous Production Scale Chromatography
A review of general chromatographic theory has been made together with a survey of the factors which may affect the performance of larger scale chromatographic columns. The mechanism of the chemiadsorption chromatography employed in this research has been described in detail. Various industrial …
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