Studies on tuber hemicelluloses. Part II. Hemicelluloses from the tubers of Asparagus racemosus and their complete and partial hydrolysis

Abstract

The hemicelluloses of the tubers of Asparagus racemosus Willd. have been isolated and chemically examined. Two fractions,viz., A₂ and B₂ of Norris and Preece designation, have been obtained. Both the fractions are constituted from the same sugar and uronic acid, namely, glucose and galacturonic acid but in different proportions. In hemicellulose A₂ the molecular ratio of these compounds is 10:1, while in B₂ it is 5:2. Under conditions of partial hydrolysis, both the fractions give rise to glucose and a gluco-galacturonic acid.