Abstract
Exhaustive extraction with anhydrous liquid ammonia removed 8.0% of wheat straw holocellulose. Acetamide was isolated from the extract and identified as the dihydrogen bromide salt. A polyuronide fraction, making up 1.3% of the holocellulose, was isolated and shown to consist of D-xylose, L-arabinose, D-glucose, D-galactose, and D-glucuronic acid in approximate molar ratios of 11:3:3:1:2.5. Analysis and hydrogenation of the noncarbohydrate portion of the liquid ammonia extract showed it to consist of low molecular weight degradation products among which methylamine was identified. A separate experiment showed that anhydrous liquid ammonia degraded an isolated polyuronide by 8.4%; all components of the polyuronide were equally affected.
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