Advances in Carbohydrate Chemistry and Biochemistry 47 by R. Stuart Tipson and Derek Horton (Eds.)

By R. Stuart Tipson and Derek Horton (Eds.)

Show description

Read Online or Download Advances in Carbohydrate Chemistry and Biochemistry 47 PDF

Best inorganic books

Combinatorial methods for chemical and biological sensors

Sensing fabrics play a key function within the profitable implementation of chemical and organic sensors. Written by way of favourite individuals to the sector, Combinatorial equipment for Chemical and organic Sensors records the influence of combinatorial equipment for the layout of latest polymeric, inorganic, organic, and formulated sensing fabrics.

Encyclopedia of Inorganic Chemistry

The last word source on inorganic chemistry – new and entirely revised, 10 years after e-book of the 1st variation the 1st variation of the Encyclopedia of Inorganic Chemistry taken care of the weather of the periodic procedure in alphabetical order, with a number of entries for key components. The articles from the 1st variation have been written greater than 10 years in the past and all components of inorganic chemistry have noticeable this sort of energetic improvement that it was once essential to replace such a lot articles and so as to add plenty of new articles.

Additional resources for Advances in Carbohydrate Chemistry and Biochemistry 47

Sample text

38 STEPHEN J. '44 The method is eminently suitable for the separation of cyclitols and alditols from each other. Reports of such separations achieved on ion-exchange columns are too numerous to be listed here, but some typical examples are as follows. '~~ The sugars emerge from the column in the order listed here. Three compounds were found to emerge from the chromatographiccolumn much later than expected from their configurationsand from comparison with related compounds. It has been postulated that these compounds V.

Mo, T. J. Brobak, and I. R. , 145 (1985) 13-24. COMPLEXES OF METAL CATIONS WITH CARBOHYDRATES 25 23 A monosaccharide cannot provide more than three oxygen atoms for coordination to a cation, but a molecule containing two monosaccharide units (for example, a disaccharide) can offer a site for four- or five-fold coordination. The sixth example is a disaccharide especially synthesized in order to provide a site for five-fold coordination. In the a-D-allopyranosyl C U - D - ~ ~ ~ O pyranoside molecule, both moieties have an a,e,a sequence, and it was predicted that a cation would coordinateto five oxygen atoms.

Chem. Soc. , 49 ( 1976) 15 17 - 1520. STEPHEN J. ANGYAL 32 Alginate is a polymer consisting of a-L-gulopyranosyluronateand p-Dmannopyranosyluronate subunits; pectate consists of a-D-galactopyranosyluronate units, all (1 +4)-linked. The a-L-guluronate moiety has an a,e,a arrangement of oxygen atoms, rare in natural products. To explain the dramatic changes in the properties of alginic acid on addition of Caz+ions, Smidsrsd and coworkers119and, independently, Angyal,'*O suggested the formation of a complex (25) in which 0-4, 0-5, and 0-6 of a guluronate residue and 0-2 and 0-3 of a contiguous guluronate residue in the polymer chain are coordinated to Ca2+(0-4 of the first residue is 0-1 of the second).

Download PDF sample

Rated 4.05 of 5 – based on 17 votes