[NMR analyses of oligosaccharides from a new water-absorbing polysaccharide produced by the family oxalobacteraceae].

Partial acid hydrolysis of a new water-absorbing polysaccharide (WAP) from the family Oxalobacteraceae gave six di-, four tri-, two tetra-, two penta-, and one hexasaccharides composed of mannose, glucose, and/or galactose. The structures of oligosaccharides 1-15 were elucidated by extensive 2D NMR spectroscopic analyses. (1)H- and (13)C-NMR chemical shift assignments of oligosaccharides 1-14 are presented.

Cellulose as extracellular polysaccharide of hot spring sulfur-turf bacterial mat.

The carbohydrate fraction of a hot spring sulfur-turf bacterial mat was shown to contain cellulose by the examination of neutral sugar composition, methylation analysis, and the identification of free oligosacchrides obtained from an acetolyzate of the desulfurized sulfur-turf mat. This suggested that the sulfur-oxidizing bacteria composing the sulfur-turf were producers of cellulose.