Premium
Estimating Cooling Process Lethality for Different Cooling j Values
Author(s) -
LARKIN JOHN W.,
BERRY MAURICE R.
Publication year - 1991
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.1365-2621.1991.tb14642.x
Subject(s) - lethality , ball (mathematics) , thermodynamics , mathematics , materials science , chemistry , physics , geometry , biology , toxicology
Cooling lethalities were determined using Ball's formula method and other lethality evaluation equations for f c from 10–120 min, j c of 0.25–2.21, L/D geometry values of 0.25–2.0, and the difference between final heating and cooling temperatures of 72.2–111.1°C. For j c < 1.35 the Ball method overestimated the cooling lethality (>42% for j c =1). For f c of 35–130 min and j c > 0.7, all but one of the models that account for variable j c were conservative in estimating cooling lethality and underestimated lethality as j c increased above 1.41. The proposed modified hyperbolic function estimated conservative cooling lethalities over the entire range of f c and j c values studied and was 60% more accurate in estimating actual lethality than the next best conservative method at j c = 2.0.