DISTRIBUTION OF PARTIAL DIGESTION PRODUCTS OF HYDROXYPROPYL DERIVATIVES OF MAIZE (NM), WAXY MAIZE (WM) AND HIGH AMYLOSE (HA) MAIZE STARCHES

Porcine pancreatic a-amylase digests of native and hydroxypropyl deriv atives of maize, waxy maize and high amylose maize starches were subje cted to ethanolic fractionation into oligosaccharide and polysaccharid e Fractions. Both fractions of the partial digests were analysed for b lue values, reducing values, total carbohydrate, average degree of pol ymerisation and molar substitution (MS). Distribution of hy droxypropy l groups between the fractions varied depending on starch type and lev el of substitution with the polysaccharide fraction being higher in MS . Blue values (BV) and average degree of polymerisation (DP) tended to decrease with digestion while reducing (RV) increased.