At each ethanol concentration level, as the carbon chain length increased, the thresholds of esters initially showed a decreasing trend, followed by an increasing trend (except for ethyl caprylate) ( Table 3 ).
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The Effect of Ethanol on the Compound Thresholds and Aroma Perception in Chinese Baijiu.
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The sentences
In addition, the change of the threshold value from acetic acid to heptanoic acid also showed a trend of first decreasing and then increasing.