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Lactoperoxidase Effects on Rheological Properties of Yogurt
Author(s) -
HIRANO R.,
HIRANO M.,
OOOKA M.,
DOSAKO S.,
NAKAJIMA I.,
IGOSHI K.
Publication year - 1998
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1998.tb15670.x
Subject(s) - streptococcus thermophilus , lactoperoxidase , food science , chemistry , rheology , skimmed milk , lactobacillus , lactobacillus delbrueckii subsp. bulgaricus , proteolysis , lactobacillaceae , biochemistry , peroxidase , enzyme , materials science , fermentation , composite material
A mixed culture ( Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus ) was inoculated into reconstituted skim milk and incubated. When 0.45 Unit/g or more of lactoperoxidase (LPO) was added, the yogurts had softer and smoother texture than untreated yogurt. The apparent viscosity of yogurt was also reduced by addition of LPO. The storage modulus (G') of the gel of LPO‐treated yogurt decreased but the frequency‐dependency remained unchanged. The amount of exopolysaccharide or degree of proteolysis in yogurt was not changed by addition of LPO.