Identification of two yeast stains with antioxidant activity and their effects on the main component of bovine milk

Abstract:

To obtain industrial yeast strains with antioxidant activity,identification of two yeasts with excellent antioxidant activity,which were isolated from raw milk,were carried out in this paper.Based on their morphological,biochemical,physiological and genotypic characterization,two strains were identified as Pichia fermentans.Then,the influence of these two strains on the main components in the milk was further evaluated by incubating in ultra high temperature(UHT)-processed bovine milk.The results indicated that both of these two strains were able to produce ethanol and facilitate proteolysis and lipolysis,and increased the content of free amino acid and fatty acid in the UHT milk.