| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method which enables the highly accurate, quick and convenient measurement of a factor causing early flocculation of yeast contained in a brewing material and further enables the quick measurement of a number of specimens. <P>SOLUTION: The method of quickly measuring a factor causing early flocculation of yeast in a brewing material includes: the process (1) of mixing yeast in the late logarithmic growth phase or thereafter with a water-extracted high-molecular fraction prepared from a test material sample in a buffer and suspending the obtained mixture therein; and the process (2) of irradiating the suspension obtained by the process (1) with visible light, photographing a scattered light with a camera device, image-analyzing the obtained image data and thus determining the degree of whiteness of the suspension to thereby determine the degree of sedimentation of the yeast in the suspension. The measurement is performed while controlling the temperature of the suspension obtained by the process (1) at a constant temperature within the range from 20 to 45°C. Besides, when it is desired to measure the factor of high early flocculation activity, the temperature of the suspension is set at that higher than the temperature range. <P>COPYRIGHT: (C)2011,JPO&INPIT |
