Application of numerical analysis to a number of models for chymosin-induced coagulation of casein micelles

Autor:	Douglas B. Hyslop, Karsten B. Qvist
Rok vydání:	1996
Předmět:	Flocculation Chromatography Chemistry Thermodynamics General Medicine symbols.namesake Reaction rate constant Casein Boltzmann constant symbols Coagulation (water treatment) Animal Science and Zoology Rennet Chymosin Constant (mathematics) Food Science
Zdroj:	Journal of Dairy Research. 63:223-232
ISSN:	1469-7629 0022-0299
DOI:	10.1017/s0022029900031721
Popis:	SummaryFour models describing renneting kinetics are evaluated for their ability to describe well documented attributes of the coagulation of casein micelles. The first model is based on a constant flocculation rate parameter. In the second the flocculation rate constant is proportional to the product of the sizes of the aggregating particles. Both models fail to predict proper dependence of rennet coagulation time on enzyme concentration. The third model is based on an energy barrier being reduced in linear proportion to the degree of proteolysis. The enzyme dependency of this model only works when the initial energy barrier is larger than ∼ 50 kBT (where kB is Boltzmann's constant and T the absolute temperature), which does not seem feasible. The fourth model, based on functionality theory, is able to predict proper dependence of rennet coagulation time on enzyme concentration when functionality is ∼ 2.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::834d4b4598fafba2fe1b0e3b0ab07b8a https://doi.org/10.1017/s0022029900031721 Zobrazit plný text záznamu