Based on five different species of barley, the foot layer analytic method was used to examine the activity and heat-resistance of the limiting dextrinase. The study was conducted on the dynamic changes of several type...Based on five different species of barley, the foot layer analytic method was used to examine the activity and heat-resistance of the limiting dextrinase. The study was conducted on the dynamic changes of several types of the dextrinase in barley germinating process, the effect of temperature on the dextrinase and the divergence of dextrinase in different barley variety. The probability of the dextrinase that as reference index is展开更多
Variation in the limit dextrinase activity of barley malt, and the relationships between limit dextrinase activity and malt quality parameters were investigated using eight cultivars grown at seven diverse locations i...Variation in the limit dextrinase activity of barley malt, and the relationships between limit dextrinase activity and malt quality parameters were investigated using eight cultivars grown at seven diverse locations in China for two successive years. Limit dextrinase activity varied with genotype and location, with the levels ranging from 0.245 U/g to 0.980 U/g. The results showed that the variation in limit dextrinase activity was more attributable to the environment (location and year) than to the genotype. The response of limit dextrinase activity to the environment differed markedly among cultivars, and was reflected by large difference in coefficient of variation of cultivars across diverse locations. Regression analysis showed that limit dextrinase activity was negatively correlated with malt viscosity (r=?0.52, P<0.01), positively correlated with Kolbach index (r=0.38, P<0.01) and malt extract (r=0.30, P<0.05), but had no significant correlation with malt protein content and diastatic power.展开更多
文摘Based on five different species of barley, the foot layer analytic method was used to examine the activity and heat-resistance of the limiting dextrinase. The study was conducted on the dynamic changes of several types of the dextrinase in barley germinating process, the effect of temperature on the dextrinase and the divergence of dextrinase in different barley variety. The probability of the dextrinase that as reference index is
基金Project supported by the National Natural Science Foundation of China (Nos. 30270779 and 30471022) and the Specialized Research Fund for the Doctoral Program of Higher Education (No. 20020335028), China
文摘Variation in the limit dextrinase activity of barley malt, and the relationships between limit dextrinase activity and malt quality parameters were investigated using eight cultivars grown at seven diverse locations in China for two successive years. Limit dextrinase activity varied with genotype and location, with the levels ranging from 0.245 U/g to 0.980 U/g. The results showed that the variation in limit dextrinase activity was more attributable to the environment (location and year) than to the genotype. The response of limit dextrinase activity to the environment differed markedly among cultivars, and was reflected by large difference in coefficient of variation of cultivars across diverse locations. Regression analysis showed that limit dextrinase activity was negatively correlated with malt viscosity (r=?0.52, P<0.01), positively correlated with Kolbach index (r=0.38, P<0.01) and malt extract (r=0.30, P<0.05), but had no significant correlation with malt protein content and diastatic power.
