Galactose composition

When gum is extracted from seeds in which the mucilage exhibits a broad range of species differing in D-mannose and D-galactose composition, the D-mannose D-galactose ratio of the product obtained depends very much on the method of extraction used. Thus, if cold... 

The determination of the sugar composition was performed with and without prehydrolysis to determine the cellulose content. Cellulose was present in soy meal and in WUS, the content was respectively 17.2 and 17.9 mol%. Both soy meal and WUS contained mainly galactose, glucose (cellulose), arabinose and uronic acids and their sugar compositions were very similar. This indicates that no sugar residues were specifically removed during the isolation procedure. 

ChSS and DASS were rich in arabinose, galactose and uronic acids. These were, as expected, pectin-rich extracts and had a very similar sugar composition. The 1 MASS fraction was also rich in arabinose, galactose and uronic acids, but next to that it is also enriched in... 

Figure 2. Sugar composition of polyuronides (I) and hemicelluloses (II) extracted from strawberry tissues at different stages of ripeness. Galacturonic acid, [Q Rhamnose, S Arabinose, Galactose, 0 Glucose, Cl Xylose, ED.

Summarised in Table 1 is the neutral sugar compositions and anhydrogalacturonic acid content of XRPP released by pectinase reaction and acid hydrolysis, respectively. In both cases, XRPP were found to be rich in xylose and galactose content, but low in mannose content. The total neutral sugar content in XRPP released by acid hydrolysis was 28.4%,... 

Characteristics of fraction I. The carbohydrate content of Fraction I was 84.4 %, in which the main component is D-galacturonic acid (71 %). Consequently, the polysaccharide is of a pectic type. The neutral sugars accounted for 13.4 % and according to their qualitative composition (Table 2) they correspond to the composition of pectin, isolated from sunflower heads (18). It is worth noting the high content of L-arabinose and D-galactose, compared with the other monosaccharides. The protein content was 7.8 %. 

Modifications of the cell wall composition of released cells occured during the maceration (Fig. 5). In pectic polysaccharide, galactose increased whereas galacturonic acid and arabinose decreased. Cellulose and hemicellulose compositions were not modified. 

Arabinose, fructose, galactose, glucose, maltose, mannose, mucilages of various compositions, oligosaccharides, raffinose, rhamnosc, ribose, sucrose, xylose Amino acids... 

Composition and Structure. Chemical analysis of the polymer from our first strain (NCIB 11592) indicated that it was a polysaccharide containing the sugars, glucose and galactose, and the carboxylic acids - - succinic and pyruvic - - in the approximate ratios 7 1 1 1. 

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