Abstract
THE structure of cotton α-cellulose has been developed on the assumption that its building unit is glucose only. It is, of course, believed that raw cotton contains small amounts of pentoses which are removed by prolonged boiling in alkali and subsequent treatment of the product with 17.5 per cent sodium hydroxide during the preparation of purified α-cellulose. Chromatographic analysis has shown1 that raw cotton contains glucose, xylose, arabinose and a trace of rhamnose. Adams and Bishop2 reported that cotton α-cellulose does not contain any pentose. But our findings1,3 that a part of the pentoses is very strongly associated by chemical bonds with jute α-cellulose, which was also later confirmed by Adams and Bishop2,4, suggested reinvestigation of the association of these pentoses with purified cotton α-cellulose.
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