Dynamic Changes in Browning Reaction Substrates of Polygonatum odoratum Roots during Roasting

둥글레의 볶음처리에 따른 갈변반응 기질의 동적변화

  • Published : 1997.08.01

Abstract

Response surface methodology was applied to monitor dynamic changes in free sugars and free amino acids associated with browning reaction during roasting of Polygonatum odoratum roots. Second-order model for qualities of water- soluble extracts was employed to generate contour maps and response surfaces. Browning color intensity of water-soluble extracts was increased with the roasting time up to around 14$0^{\circ}C$, but decreased in increasing temperature above L6O"C. Free sugars, mainly composed of sucrose and fructose, were remarkably decreased at roasting under the higher temperature and longer time, while glucose linearly increased with the increase of roasting temperature up to 15$0^{\circ}C$. Most of free amino acids was decreased in their amounts in Proportion to the roasting temperature and time, while threonine and lysine were insignificantly increased under the roasting conditions at above 17$0^{\circ}C$ and 60min.0min.

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