[Objective]To explore the best T.sinensis processing technology.[Method]The T.sinensis was treated by hot wind drying,freeze drying and blanching,and the contents of ascorbic acid,total phenolics and nitrite were dete...[Objective]To explore the best T.sinensis processing technology.[Method]The T.sinensis was treated by hot wind drying,freeze drying and blanching,and the contents of ascorbic acid,total phenolics and nitrite were determined respectively before and after the treatment to be a standard to evaluate the influence of different processing methods on the quality of T.sinensis.[Result]Both drying and blanching produced certain impact on the contents of all three components,among which the content of ascorbic acid was slightly influenced by vacuum freeze drying and short-time blanching,but greatly affected by long-time blanching and hot wind drying;the loss rate of polyphenols was above 60% when the hot wind drying,freeze drying and blanching lasted for more than 5 min,while it experienced little change under short-time blanching;hot wind drying and blanching may greatly reduce the content of nitrite,however,the vacuum freeze drying even improved the content,which would produce adverse impact on food safety.[Conclusion]Short-time blanching is the best method to process T.sinensis,it can effectively reduce its content of nitrite and retain the nutrients.展开更多
目的研究大孔树脂静态吸附香椿子多酚的热力学与动力学特征。方法福林酚法测定香椿子多酚含有量,考察大孔树脂(DM130、AB-8、HPD400、HPD450、HPD-826)的吸附效果,绘制等温线、动力学的静态吸附曲线。结果HPD400大孔树脂的吸附符合Freun...目的研究大孔树脂静态吸附香椿子多酚的热力学与动力学特征。方法福林酚法测定香椿子多酚含有量,考察大孔树脂(DM130、AB-8、HPD400、HPD450、HPD-826)的吸附效果,绘制等温线、动力学的静态吸附曲线。结果HPD400大孔树脂的吸附符合Freundlich、Langmuir方程,为吸热、熵增、可逆和自发进行的吸附,可用准二级动力学方程表示吸附动力学规律,其主要速控步骤为液膜扩散,吸附活化能为0.937 k J/mol。结论 HPD400大孔树脂对香椿子多酚有较好的吸附性能。展开更多
基金Supported by National Natural Science Foundation(30771510)
文摘[Objective]To explore the best T.sinensis processing technology.[Method]The T.sinensis was treated by hot wind drying,freeze drying and blanching,and the contents of ascorbic acid,total phenolics and nitrite were determined respectively before and after the treatment to be a standard to evaluate the influence of different processing methods on the quality of T.sinensis.[Result]Both drying and blanching produced certain impact on the contents of all three components,among which the content of ascorbic acid was slightly influenced by vacuum freeze drying and short-time blanching,but greatly affected by long-time blanching and hot wind drying;the loss rate of polyphenols was above 60% when the hot wind drying,freeze drying and blanching lasted for more than 5 min,while it experienced little change under short-time blanching;hot wind drying and blanching may greatly reduce the content of nitrite,however,the vacuum freeze drying even improved the content,which would produce adverse impact on food safety.[Conclusion]Short-time blanching is the best method to process T.sinensis,it can effectively reduce its content of nitrite and retain the nutrients.
文摘目的研究大孔树脂静态吸附香椿子多酚的热力学与动力学特征。方法福林酚法测定香椿子多酚含有量,考察大孔树脂(DM130、AB-8、HPD400、HPD450、HPD-826)的吸附效果,绘制等温线、动力学的静态吸附曲线。结果HPD400大孔树脂的吸附符合Freundlich、Langmuir方程,为吸热、熵增、可逆和自发进行的吸附,可用准二级动力学方程表示吸附动力学规律,其主要速控步骤为液膜扩散,吸附活化能为0.937 k J/mol。结论 HPD400大孔树脂对香椿子多酚有较好的吸附性能。
