以白酒酒醅为研究对象,在酒醅发酵过程中,测定了酒醅中的淀粉酶、糖化酶、蛋白酶、纤维素酶、果胶酶和脂肪酶的活性,同时,测定了酒醅中总酯、乙酸乙酯、丁酸乙酯、己酸乙酯和乳酸乙酯的含量。利用相关分析和主成分分析研究了平均酶活与酯类生成量之间的相关性。相关分析表明,不同酶活与酯类生成之间存在不同程度的相关性。通过主成分分析,提取了6种酶的2个主成分,代表了酶的2种作用。根据主成分与酯类生成的相关性,探讨了酶活对酯类生成的影响。

Using liquor fermented grains as study object,the enzyme activities of amylase,glucoamylase,protease,cellulase,pectinase and lipase,and the content of esters including total esters,ethyl acetate,ethyl butyrate,ethyl caproate and ethyl lactate were detected during fermentation of liquor fermented grains. The correlation between average enzyme activities and esters production was studied by correlation analysis and principal component analysis.The result of correlation analysis showed that different enzymes had different correlation coefficient with esters production. Two principal components of 6 kinds of enzymes were obtained through principal component analysis,which represented two actions of enzymes. Based on the correlation between principal components and esters production,the effects of enzymes on the esters production were studied.