DisplayTitle

Hydroxypropylated Starch: Granule Subpopulation Reactivity¹

¹Contribution 17005 of Agricultural Research Programs, Purdue University. ²Whistler Center for Carbohydrate Research, 745 Agriculture Mall Drive, Purdue University, West Lafayette, IN 47907-2009. ³Corresponding author. E-mail: bemiller@purdue.edu.

To determine differences in the reactivity of individual starch granules based on size, maize, wheat, and potato starches were hydroxypropylated then fractionated into subpopulations containing the largest and smallest granules under conditions that minimized leaching. Molar substitution values of the fractions within each starch were similar, indicating little if any differences in reactivity of granules of different size when reacted with propylene oxide, a slow-reacting reagent.