Production of esterified starches with increased resistant starch content by an -hydroxy acid-catalyzed route

M.V. TUPA; S. ARROYO; M.L. HERRERA; M. L. FORESTI

STARCH/STARKE

WILEY-V C H VERLAG GMBH

Lugar: Weinheim; Año: 2018

0038-9056

Resistant starch (RS) refers to the portion of starch that is not brokendown by human enzymes in the small intestine, and thus reaches the large bowelof healthy individuals. In the large bowel RS is fermented by colonicmicroflora producing short chain fatty acids (SCFA) -predominantly acetate,propionate and butyrate- that are known to contribute substantially to largebowel health. Currently, there is an increasing interest in obtaining RS byesterification of starch with target SCFA, due to its capacity to deliver significantquantities of the particular esterified SCFA to the colon.In the current contribution an a-hydroxy acid-catalyzed methodology which hasrecently proven useful for esterifying starch, was used to produce acetylated,propionylated and butyrylated corn starch samples with varying DS (0.05 ? 0.75).Results showed the suitability of the route to produce the RS4 starch type,with RS contents that increased with the degree of substitution (DS) as aconsequence of a larger steric hindrance effect caused by a higher number of estergroups introduced. Data also indicated that the DS conferred to starch was thekey factor conditioning its resistance, whereas RS content showed to beindependent of the resulting esterified starch structure and the type of ester groupintroduced.