Heat stability of oil-in-water emulsions formed with intact or hydrolysed whey proteins: influence of polysaccharides

2006 ◽  
Vol 20 (2-3) ◽  
pp. 269-276 ◽  
Author(s):  
A. Ye ◽  
H. Singh
2021 ◽  
Vol 116 ◽  
pp. 106632
Author(s):  
Catherine Russell ◽  
Aikaterini A. Zompra ◽  
Georgios A. Spyroulias ◽  
Karina Salek ◽  
Stephen R. Euston

2002 ◽  
Vol 18 (3-4) ◽  
pp. 15-20 ◽  
Author(s):  
T. Grega ◽  
M. Sady ◽  
J. Kraszewski

Investigations were carried out on milk cows of Black -and- White breed being in 2-nd lactation 30-120 day after parturition. Experiment was performed during winter feeding season (corn silage, fodder beet silage, super beet pulp, concentrate, meadow hay). Cows of the experimental group received supplement (5% of concentrate) of the herb mixture in feeding ratio. The composition of this mixture was as follows: Urtica dioica, Fructus carvi, Pradix teraxaci, Agrimonio eupatoria, Matrica chamomilla. The obtained results show that supplementation of the diet by herb mixture induced increase of the following parameters: milk yield (+2 kg), fat content (+0,04%), protein content (+0,06%), citric acid (+0,10%), whey proteins (+0,02%), casein (+0,04%), dry matter (+0,12%), non fat dry matter (+0,07%). It was stated that in the experimental milk non-saturated fatty acid level was higher (+20%), in opposite to lower level of saturated fatty acids (-15%) and total cholesterol (-25%). The beneficial effect of herb mixture supplementation on the results of rennet-fermentation test, fermentation test, Sehern' s test and heat stability was stated in the experimental group milk.


2016 ◽  
Vol 61 ◽  
pp. 487-495 ◽  
Author(s):  
Marie Chevallier ◽  
Alain Riaublanc ◽  
Christelle Lopez ◽  
Pascaline Hamon ◽  
Florence Rousseau ◽  
...  

1985 ◽  
Vol 52 (4) ◽  
pp. 529-538 ◽  
Author(s):  
Harjinder Singh ◽  
Partick F. Fox

SUMMARYPreheating milk at 140 °C for 1 min at pH 6·6, 6·8, 7·0 or 7·2 shifted the heat coagulation time (HCT)/pH profile to acidic values without significantly affecting the maximum stability. Whey proteins (both β-lactoglobulin and α-lactalbumin) co-sedimented with the casein micelles after heating milk at pH < 6·9 and the whey protein-coated micelles, dispersed in milk ultrafiltrate, showed characteristic maxima–minima in their HCT/pH profile. Heating milk at higher pH values (> 6·9) resulted in the dissociation of whey proteins and κ-casein-rich protein from the micelles and the residual micelles were unstable, without a maximum–minimum in the HCT/pH profile. Preformed whey protein–casein micelle complexes formed by preheating (140 °C for 1 min) milk at pH 6·7 dissociated from the micelles on reheating (140 °C for 1 min) at pH > 6·9. The dissociation of micellar-κ-casein, perhaps complexed with whey proteins, may reduce the micellar zeta potential at pH ≃ 6·9 sufficiently to cause a minimum in the HCT/pH profile of milk.


1986 ◽  
Vol 264 (7) ◽  
pp. 631-638 ◽  
Author(s):  
G. Masson ◽  
R. Jost
Keyword(s):  

Author(s):  
Shimo Peter Shimo ◽  
W U Xiaoyun ◽  
Ding Xuezhi ◽  
Yan Ping

The aim of this study was to characterize the effect of heat denaturation on Immunoglobulin G (IgG) and Lactoferrin (LF) in yak milk and colostral liquid whey at medium acidic conditions in presence of protectants (CaCl2; Glycerol and Sodium Dodecyl Sulphate - SDS). Results indicated significant (P less than 0.05) heat stability improvement of IgG and LF in liquid whey samples at medium acidic and temperature (72 - 90oC) with less precipitates formation regardless of type of protectants added especially at pH 3.5 and 4.6. The mean concentration values for IgG percentage reduction (72 – 90oC; pH 3.5 – 5.5; protectants) ranged from 6 to 26% and 15 to 31% in yak milk and colostral liquid whey, respectively. The percentage of heat denaturation effect for LF ranged from 11 to 32%t and 14 to 38% in yak milk and colostral liquid whey, respectively. Application of glycerol in both environmental processing conditions was the most effective in heat stability improvement followed by SDS and CaCl2.


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