Cereal Chem 54:690 - 698.  |  VIEW ARTICLE
Distribution of Carbohydrates in Early Harvested Barley Grain.

B. Gohl, K. Larsson, M. Nilsson, O. Theander, and S. Thomke. Copyright 1977 by the American Association of Cereal Chemists, Inc. 

Layers of early-harvested barley grain (65% dry matter at harvest, immediately dried afterwards) were successively removed by abrasive milling. Fractions collected after about 25 to 55% of the kernel weight had been abraded gave viscous water suspensions. A maximum in viscosity was found in the fraction where 42-52% of the kernel weight was removed. The fractions removed were extraced with 80% ethanol followed by extraction with water. The extracts and the residues after water extraction were analyzed for carbohydrates. The ethanol extracts contained mostly sucrose together with stachyose, raffinose, glucose, fructose, glucitol, and myoinositol. Trace amounts of xylose were found in the fractions making up the first 25% of the material abraded. Acid hydrolysates of the water extracts contained mostly glucose, together with galactose, mannose, rhamnose, arabinose, and xylose. Hydrolysis of the extraction residues yielded mainly glucose, except in the outer layers where galactose, arabinose, and xylose were identified. The distributions of crude protein, lignin, crude fat, and ash were also determined.