Esterification of Polysaccharides
STRUCTURE OF POLYSACCHARIDES
... content of the polysaccharide can be increased by epimerization of the C-5 centre of α -l-guluronic acid to give β -d-mannuronic acid. In view of the fact that the structural features of the polysaccharides ... Structure of Polysaccharides The DP of chitin is in the range of 5000 up to 10 000. Owing to hydrogen bonds, chitin occurs in three different polymorphic forms that...
Ngày tải lên: 25/10/2013, 16:20
The Complex World of Polysaccharides Edited by Desiree Nedra Karunaratne pptx
... control of the biosynthesis of exopolysacchrides of Rhizobium leguminosarum. It is shown that diversity of the exopolysaccharides biosynthesized results from genetic rearrangements of the glycosyl ... described in the characterization of diatom polysaccharides. The final chapter on biofilm matrices deals with problems encountered in isolation of the biofilm polysaccharides...
Ngày tải lên: 31/03/2014, 19:20
Báo cáo khoa học: Structure of the O polysaccharides and serological classification of Pseudomonas syringae pv. porri from genomospecies 4 doc
... Particularly, the positions of substi- tution of the rhamnose residues followed from downfield displacements of the signals for C3 of Rha I and Rha IV , C2 of Rha III , C2 and C3 of Rha II to d 77.3–79.1, ... ( D -GlcN). Methylation analysis of the OPS Table 4. Structures of the O polysaccharides of P. syringae havingamainchainof L -rhamnose tetrasaccharide O repeats and si...
Ngày tải lên: 08/03/2014, 08:20
Báo cáo Y học: Structures of two O-chain polysaccharides of Citrobacter gillenii O9a,9b lipopolysaccharide pot
... displacements of parts of the signals for C1 and C3 of Rha4NAc II from d 102.9 and 78.0 t o d 101.6 a nd 76.6, respectively, which a re typical of b-effe cts of acetylation at O2 [22]. Therefore, part of ... and 1 H, 13 C HMQC spectra of PS NH 4 OH and PS enabled the determi- nation of the site of attachment of t he O-acetyl group. In the 1 H, 13 C HMQC s pectrum, the inte...
Ngày tải lên: 08/03/2014, 16:20
Báo cáo khoa học: Structures of the O-polysaccharides and classification of Proteus genomospecies 4, 5 and 6 into respective Proteus serogroups ppt
... tested Proteus lipopolysaccharides, inclu- ding those of 27 strains of P. vulgaris, 39 strains of P. mirabilis, 24 strains of P. penneri, one strain of P. myxofaciens, one strain of P. hauseri and ... in several other bacterial polysaccharides [15], including O -polysaccharides of Proteus [16]. Studies of the O -polysaccharides of Proteus genomo- species 5 and 6 and the...
Ngày tải lên: 16/03/2014, 23:20
Báo cáo khoa học: Mechanism of mild acid hydrolysis of galactan polysaccharides with highly ordered disaccharide repeats leading to a complete series of exclusively odd-numbered oligosaccharides doc
... sequence of alternating 4-sulfated 3-linked galactose and 4-linked 3,6-anhydrogalactose units. In contrast to many examples of chemical hydrolysis of polysaccharides, mild acid treatment of j-carra- geenan ... mechanism of acid hydrolysis of the 3,6-anGal-containing galactans. Results and Discussion Identification of a complete series of odd-numbered oligosaccharides resulting...
Ngày tải lên: 23/03/2014, 04:21
Báo cáo khoa học: Sulfated polysaccharides inhibit the catabolism and loss of both large and small proteoglycans in explant cultures of tendon doc
... the loss of 35 S-labeled proteoglycans from the matrix of tendon explants. The rate of incorporation of [ 3 H]serine into proteins of tendon explant cultures was measured on days 5 and 10 of the ... inclusion of these sulfated agents there was significant inhibition (40%) of rate of loss of 35 S-labeled large proteogly- cans from the matrix by the end of the culture peri...
Ngày tải lên: 23/03/2014, 10:21