Van der Linde, Michael John

Title: "Complexes of carbohydrates with magnesium-ions" : "the isolation of an oligosaccharide containing L-galactose from the polysaccharide of Aeodes orbitosa" : "horizontal cellulose colum chromatography of sugars"
Creator: Van der Linde, Michael John
Subject: Magenesium
Subject: Ions
Subject: Carbohydrates
Subject: Oligosaccharides
Subject: Polysaccharides
Subject: Chromatographic analysis
Date Issued: 1974
Date: 1974
Type: Thesis
Type: Doctoral
Type: PhD
Identifier: vital:4504
Identifier: http://hdl.handle.net/10962/d1013282
Description: Sugar complexes with anions and cations are reviewed. Evidence is presented for the formation of a complex of stoichiometry 1:1 in aqueous solution between methyl-α-Dglucopyranoside and magnesium perchlorate. The complex may be detected by the method of continuous variations. Measurements of changes in the proton chemical shifts of the glucoside in dauterium oxide, indicate that the complex is probably formed between the vicinal hydroxyl groups at C-2 and C-3 of the pyranoside ring and the hydrated cation. At elevation temperatures there is evidence for the presence of a complex of stoichiometry 2:1. Experiments conducted on cellulose indicate the possible formation of cellulose - magnesium-ion complexes . These complexes provide an explanation for the "protective action" of mEgnesium compounds on the cellulose portion of pulp during alkali-oxygen bleaching.
Format: 126 leaves
Format: pdf
Publisher: Rhodes University
Publisher: Faculty of Science, Chemistry
Language: English
Rights: Van der Linde, Michael John

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"Complexes of carbohydrates with magnesium-ions" : "the isolation of an oligosaccharide containing L-galactose from the polysaccharide of Aeodes orbitosa" : "horizontal cellulose colum chromatography of sugars"