- About
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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 161 to 170 of 258 (0.007 seconds)| 161 |
The hemicelluloses of bambooWoo, S. L. January 1975 (has links)
No description available.
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| 162 |
The hemicelluloses of the developing oat plantReid, J. S. G. January 1967 (has links)
No description available.
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| 163 |
Synthesis and physical properties of carbohydrate-derived surfactantsLanglois, V. J. M. January 1993 (has links)
The aim of the research work was to synthesise carbohydrate-derived surrfactants (each derivative having a different head group, alkyl chain length or alkyl chain position) and measure their physical properties to study the influence of structural changes on physical properties. Chapter 1 contains a general introduction to the field of surfactant synthesis, surfactant classification and environmental impact. The results of the literature search concerning the existing carbohydrate-derived surfactants and their physical properties are summarised in Chapter II; the influence of structural changes on physical properties and the choice of target molecules are next discussed. The synthesis of monoalkylated monosaccharide derivatives, namely 6-<i>O</i>-decyl-<i>D</i>-galactose and 6-<i>O</i>-decyl-<i>D</i>-galactitol, was first undertaken (Chapter III) before considering the dialkylated lactoside derivatives; to begin with, the conformation of methyl β-lactoside was studied to find the possible categories of dialkylated lactoside derivatives; the target molecules were thus selected (Chapter IV). Then, the synthesis of methyl β-lactoside was fully achieved while unsuccessful results were obtained with the synthesis of hexyl β-lactoside (Chapter V). Chapters VI and VII give an account of the synthesis of methyl 4',6'- and methyl 3',4'-di-<i>O</i>-alkyl-β-lactosides (both hexyl and octyl derivatives) whereas Chapter VIII deals with the selective acylation of methyl 3',4'-di-<i>O</i>-octyl-β-lactoside in attempts to improve its solubility. The low solubilites measured for the synthesised derivatives prevented the measurement of physical properties such as critical micelle concentration or surface tension. However, the phase behaviour could be studied. All the derivatives showed thermotropic and/or lyotropic behaviour; Krafft points, clearing point and liquid crystal phase sequences were thus determined (Chapter IX). Finally, molecular modelling of the dialkylated lactoside derivatives was performed (Chapter X).
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The deamination of pryanoside aminesNg Ying Kin, N. M. K. January 1970 (has links)
No description available.
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| 165 |
Structural studies of the carbohydrate moieties of mucusCarter, S. R. January 1985 (has links)
No description available.
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| 166 |
Glycosyltransferase Inhibitors : Synthesis of Donor Analogues and Bi-substrate Based MimeticsFinlay, R. M. J. January 2010 (has links)
No description available.
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| 167 |
Studies towards the chemo-enzymatic synthesis of carba-GDP-mannose; A mannosyl transferase donor substrate analogueWilliams, Paula Mary January 2011 (has links)
No description available.
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| 168 |
Novel approaches in the valorization of cellulose as a renewable fine chemicals feedstockSchleck, David January 2010 (has links)
No description available.
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| 169 |
Hydrodynamic studies on polysaccharides and their interactionsAng, Shirley January 2009 (has links)
No description available.
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| 170 |
Development of novel oxathiane glycosyl donorsFascione, Martin Anthony January 2009 (has links)
No description available.
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