Rs. Patel et Vv. Mistry, PHYSICOCHEMICAL AND STRUCTURAL-PROPERTIES OF ULTRAFILTERED BUFFALO MILK AND MILK POWDER, Journal of dairy science, 80(5), 1997, pp. 812-817
Buffalo skim milk containing 10.20% total solids (TS), 3.96% protein,
and 5.22% lactose was ultrafiltered at 50 degrees C to 23.50% TS and 1
6.44% protein. Contents of TS, fat, ash, and protein increased during
UF, and lactose content decreased. The composition of permeate was inf
luenced by the concentration factor during UF of milk; as the concentr
ation factor increased, TS, protein, ash, and lactose content increase
d. The rejection coefficients after 77% weight reduction were 52.52% f
or TS, 94.95% for protein, 100% for fat, and 52.04% for ash. Rennet co
agulation time decreased, and gel firmness increased after coagulation
as the protein concentration of the milk increased. As examined by sc
anning electron microscopy, particles of buffalo skim milk powder had
smooth surfaces, but most had dents of varying sizes. Particle sizes r
anged from 2 to 55 mu m in diameter.