The effects of prefermentative cold soak (CS) combined with two SO 2 additions (50 and 100 mg L ?1 ) on
the anthocyanin composition, chromatic properties and sensory attributes of Barbera D'Asti and Malbec
wines were studied. Cold soak had no effect on the basic chemistry of the wines. The cultivar factor
affected anthocyanins, tannins, total phenolics and the chromatic features of the wines, favoring Malbec
over Barbera D'Asti wines. Cold soak combined with 50 mg L ?1 SO 2 failed to increase the phenolic
content of the wines relative to a control, but combined with 100 mg L ?1 SO 2 , CS increased anthocyanins,
saturation and the red color component of the wines. Cold soak þ 100 mg L ?1 also increased the sensory
attributes color intensity, violet hue, jammy aroma and astringency in Barbera Drastic wines but there was
no effect of any treatment on the sensory properties of Malbec wines. Overall, CS combined with an SO 2
addition of 100 mg L ?1 appears to have a positive effect but only from the perspective of wine phenolics
and color.
The effects of prefermentative cold soak (CS) combined with two SO 2 additions (50 and 100 mg L ?1 ) onthe anthocyanin composition, chromatic properties and sensory attributes of Barbera D'Asti and Malbecwines were studied. Cold soak had no effect on the basic chemistry of the wines. The cultivar factoraffected anthocyanins, tannins, total phenolics and the chromatic features of the wines, favoring Malbecover Barbera D'Asti wines. Cold soak combined with 50 mg L ?1 SO 2 failed to increase the phenoliccontent of the wines relative to a control, but combined with 100 mg L ?1 SO 2 , CS increased anthocyanins,saturation and the red color component of the wines. Cold soak þ 100 mg L ?1 also increased the sensoryattributes color intensity, violet hue, jammy aroma and astringency in Barbera Drastic wines but there wasno effect of any treatment on the sensory properties of Malbec wines. Overall, CS combined with an SO 2addition of 100 mg L ?1 appears to have a positive effect but only from the perspective of wine phenolicsand color.
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