摘要:
The invention relates to yeasts expressing the gene BDH1 coding for Bdh1p, characterized in that they catalyze, in an alcoholic fermentation medium, the reduction of acetoin into 2,3-butanediol by a rate at least twice higher than that of the initial stem. The invention can particularly be used for the fermentation of fruit juice and for producing 2,3-butanediol.
摘要:
The invention relates to yeasts expressing the gene BDH1 coding for Bdh1p, characterised in that they catalyse, in an alcoholic fermentation medium, the reduction of acetoin into 2,3-butanediol by a rate at least twice higher than that of the initial stem. The invention can particularly be used for the fermentation of fruit juice and for producing 2,3-butanediol.
摘要:
The invention relates to a method for obtaining mutant yeast strains having an amplified PPP, characterised in that it comprises the culture of the strains on a substrate containing a gluconic acid salt.
摘要:
The invention relates to a method for obtaining mutant yeast strains having an amplified PPP, characterised in that it comprises the culture of the strains on a substrate containing a gluconic acid salt.
摘要:
The invention relates to a method for preparing a wine in such a way as to prevent the problems of defective ageing, according to which yeast which has been previously enriched in glutathione is introduced into the must at the beginning, during or following the alcoholic fermentation. Said enriched yeast contains more than 0.5% of glutathione, especially at least 1% of glutathione, and preferably at least 1.5% of glutathione, expressed in weight added to the weight of the dry substance of the yeast. The inventive method enables fresh white wines to be produced, which are more fruity with a more complex range of aromas. During the ageing of said wines, the freshness of the aromas is preserved and browning prevented. The invention also relates to a must which is enriched in glutathione by the introduction of enriched yeast, and to the wine produced in this way.
摘要:
The invention relates to a method for preparing a wine in such a way as to prevent the problems of defective ageing, according to which yeast which has been previously enriched in glutathione is introduced into the must at the beginning, during or following the alcoholic fermentation. Said enriched yeast contains more than 0.5% of glutathione, especially at least 1% of glutathione, and preferably at least 1.5% of glutathione, expressed in weight added to the weight of the dry substance of the yeast. The inventive method enables fresh white wines to be produced, which are more fruity with a more complex range of aromas. During the ageing of said wines, the freshness of the aromas is preserved and browning prevented. The invention also relates to a must which is enriched in glutathione by the introduction of enriched yeast, and to the wine produced in this way.
摘要:
The invention concerns dry active yeasts useful for rehydration and/or alcoholic fermentation, or rehydrated active yeasts useful for fermentation, or yeasts useful for fermentation, having a sterol content exhibiting at least two conjugated double bonds at the B cycle of at least 900 μg/g of dry weight. The invention is useful for producing fermented alcoholic beverages.