Physicochemical properties of potato starch illuminated with visible polarised light
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- 作者：Fiedorowicz ; Maciej ; Lii ; Cheng-yi ; Tomasik ; Piotr
- 关键词：Starch crosslinking ; Starch depolymerisation ; Starch repolymerisation
- 刊名：Carbohydrate Polymers
- 出版年：2002
- 出版时间：October 1, 2002
- 年：2002
- 卷：50
- 期：1
- 页码：57-62
- 全文大小：100 K
文摘
Suspensions (30 % , w/w) of potato starch in pure water were illuminated for 5–50h by linearly polarised visible light (λ>500nm) under stream of nitrogen. Effects of the illumination on the transition enthalpy, melting temperature, the pasting viscosity profiles, and iodine binding capacity of illuminated starch were examined. Starch illuminated in water for 50h showed lower melting temperature Tp (60.57°C) and transition enthalpy ΔH (10.01J/g) than original potato starch soaked in water for the same period. After 25h illumination in water the peak paste viscosity, Pv, of starch decreased in order to raise after 50h illumination. Illumination in water initially degraded starch but prolonged illumination resulted in crosslinking into material of higher molecular weight.