中文摘要：

以河南焦作白玉山药为原材料,在单因素试验的基础上,采用响应面法中的Box-Behnken试验设计,对影响山药储藏蛋白提取率的3个影响因素即抽提p H值、液料比和抽提时间进行优化。结果表明：各因素对山药储藏蛋白提取率有显著影响,因素影响主次顺序为：抽提p H值〉液料比〉抽提时间,提取山药储藏蛋白的最佳工艺条件为抽提p H 8.5、液料比3∶1（m L/g）、抽提时间20 min,在此条件下山药储藏蛋白提取率的最大理论值为57.88%,实际蛋白提取率为57.74%。所得山药储藏蛋白提取回归模型显著,拟合性好,可用于预测山药储藏蛋白提取率。

英文摘要：

The extraction of storage proteins from ‘Baiyu＇ yam tubers grown in Jiaozuo, Henan province was optimized using combination of one-factor-at-a-time method, Box-Behnken design（BBD） and response surface methodology（RSM）. Three factors influencing the extraction yield of yam storage proteins, i.e., p H, liquid/material ratio and extraction time were investigated. The results showed that all these three factors had a notable effect on the extraction yield of yam storage proteins and their significance could be ranked in a decreasing order of p H liquid/material ratio extraction time. The optimal extraction conditions were determined as 8.5, 3：1（m L/g） and 20 min for p H, liquid/material ratio and extraction time, respectively. The predicted extraction yield of yam storage proteins under the optimized conditions was 57.88%, agreeing with the experimental value（57.74%）. The regression model predicting the extraction of yam storage proteins was highly significant and had excellent goodness of fit, suggesting its usefulness.