| The 1 7A wine yeast was selected from 54 natural wine yeasts in 18 grape varieties from different area by testing the capability of fermentation, Analyzing the chemical components of wine sample and sensory analysis. The result of testing the capability of fermentation showed that 1 7A yeast?s propagation and growth were fast, the ability of fermentation was powerful, The ability of adapting to grape juice was strong. The 1 7A yeast could ferment the grape juice with sugar content above 40%, 502 concentration 200mglL, alcoholic content above 15%, acid content 20g/L. It ferment in the temperature range of 3梸3 5擟, especially in lower temperature. The 1 7A yeast has stringer the ability of fermentation in contrast with four yeasts from abroad. The white wine that fermented by 17A yeast was light in color, pure and gentle to taste, harmonious to body of the wine. The fragrant constituents of the wine were analyzed by gas-mass spectrometer. The 17A yeast has the fundamental characters of the fine yeast. |
