In:
Journal of Dairy Research, Cambridge University Press (CUP), Vol. 65, No. 4 ( 1998-11), p. 545-554
Abstract:
In order to describe the kinetics of rennet coagulation, measurements
of turbidity as a function of wavelength were used to determine the weight-average
degree of polymerization, x¯ w ,
during renneting of milk at three different concentrations of enzyme and three concentrations of casein, including the normal casein
concentration of milk. The change of x¯ w as a function of time was described using Von
Smoluchowski's equation, testing a number of expressions for the aggregation rate
constant, k ij . The best description was
achieved when k ij was taken as a function
of an energy barrier against aggregation that was diminished by the proteolysis
of κ-casein. The initial value of the energy barrier partly depended
on the casein concentration, and had a value 〉 25 k B T at
normal casein concentration, where k B is Boltzmann's constant and T the absolute temperature. When
the proteolysis of κ-casein was complete, the energy barrier was reduced to
11 k B T and was independent of casein concentration.
Type of Medium:
Online Resource
ISSN:
0022-0299
,
1469-7629
DOI:
10.1017/S0022029998003148
Language:
English
Publisher:
Cambridge University Press (CUP)
Publication Date:
1998
detail.hit.zdb_id:
2000010-8
SSG:
22
