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Heat exchanger performance: y‐glutamyl transpeptidase assay as a heat treatment indicator for dairy products *
Author(s) -
PATEL SHAILAM S.,
WILBEY R ANDREW
Publication year - 1989
Publication title -
international journal of dairy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.061
H-Index - 53
eISSN - 1471-0307
pISSN - 1364-727X
DOI - 10.1111/j.1471-0307.1989.tb02162.x
Subject(s) - heat exchanger , skimmed milk , whole milk , chemistry , dairy industry , plate heat exchanger , residual , food science , chromatography , zoology , biology , physics , algorithm , computer science , thermodynamics
Whole and skimmed milks were subjected to a range of high temperature short time treatments using a pilot scale plate heat exchanger. γ‐Glutamyl transpeptidase activity was assayed in the milks and the residual activities compared against the holding temperatures and total heat treatment. There was no residual activity following treatments of 78°C for 15 seconds, a total heat treatment 8.2 times more severe than that of a hold of 15 seconds at 72° C.