Study on the Correlations between Sensory Characteristics and Microbe,Physiochemical Indexes and Biochemical Property of Luzhou Laojiao Daqu

Abstract:

Daqu sensory indexes are one of the important factors to evaluate the daqu quality.In this manuscript two kinds of Luzhou Laojiao daqu,Common-quality daqu(CQD) and high-qulity daqu(HQD) were taken as models and compared based on sensory characteristics.It was found that whether sensory characteristics have some correlativity with microbe,physiochemical indexes and biochemical property.Based on the above results,some conclusion could be made:(1) the amount of bacteria,bacillus,mold and yeast in HQD were higherthan that of CQD;(2) the water content and acidity of HQD were higher than the corresponding values of CQD,but starch content was lower than that of CQD;(3)The activity of liquefying enzyme,saccharifying enzyme and protease of HQD were all higher than that of CQD.(4) The biochemical property,such as the total free amino acids of HQD was higher than that of CQD.