Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7782471 | Carbohydrate Polymers | 2018 | 30 Pages |
Abstract
Potato flakes (PFs) are used in instant foods. They contain pre-gelatinized starch which readily develops viscosity upon hydration. We here provide the first report on factors influencing their viscosifying potential. Swelling power (SP) (râ¯=â¯0.719, pâ¯<â¯0.01) and mean particle size (râ¯=â¯â0.704, pâ¯<â¯0.05) mainly determine instant viscosity development of PF suspensions while short extractable extracellular amylose molecules [degree of polymerization between 150 and 1500 (EE-AM150-1500)] positively impact their cold paste viscosity (CPV) (râ¯=â¯0.717, pâ¯<â¯0.01) in Rapid Visco Analyzer (RVA) models. Cell wall opening by ball milling or cellulase treatments increased PF SP resulting in up to 75% higher RVA peak viscosity readings. Furthermore, the release of EE-AM150-1500 molecules increased CPV by about 30% since they readily associated upon cooling. Partial cell wall opening thus improves the viscosifying potential of PFs and expands their applicability in instant foods.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
S. Reyniers, N. De Brier, S. Matthijs, K. Brijs, J.A. Delcour,