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伊人笑(金币+5, 翻译EPI+1):非常感谢，给5个吧，下次在帮帮我啊，呵呵 2010-07-09 16:11:14
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Response surface methodology based on Box–Behnken design was used to optimize the ultrasonic extraction conditions of Flammulina velutipes polysaccharides (FVP). Four independent variables (ratio of water to raw material, ultrasonic power, ultrasonic time, and ultrasonic temperature) were considered.The rusults of statistical analysis indicated that the quadratic model fitted for the extraction conditions of FVP were very consistent with the experimental results. A yield of FVP of 39.215% was obtained under the modified conditions (ratio of water to material 24 mL/g, ultrasonic power of 410 W, ultrasonic time of 25 min, and ultrasonic temperature of 35°C). DPPH scavenging rate of 82.12% and AChE inhibitory rate of 18.51% obtained at 0.02g/mL in DPPH scavenging assay and AChE inhibitory activity test indicated a good potential of FVP to enhance cognitive ability. |
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