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Influence of race and crossbreeding on casein micelles size
Author(s) -
Freitas Denise R.,
Fonseca Leorges M.,
Souza Fernando N.,
Ladeira Cristiane V. G.,
Diniz Soraia A.,
Haddad João Paulo A.,
Ferreira Diêgo S.,
Santoro Marcelo M.,
Cerqueira Mônica M. O. P.
Publication year - 2015
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/asj.12323
Subject(s) - micelle , lactose , casein , somatic cell count , crossbreed , chemistry , food science , lactation , globules of fat , total dissolved solids , composition (language) , urea , zoology , milk fat , biochemistry , biology , organic chemistry , pregnancy , linguistics , philosophy , ice calving , environmental engineering , aqueous solution , engineering , genetics , linseed oil
Abstract Casein ( CN ) micelles are colloidal aggregates of protein dispersed in milk, the importance of which in the dairy industry is related to functionality and yield in dairy products. The objective of this work was to investigate the correlation of milk CN micelles diameter from H olstein and Z ebu crossbreds with milk composition (protein, fat, lactose, total and nonfat solids and milk urea nitrogen), somatic cell count ( SCC ), age, lactation stage and production. Average casein micelles diameters of milk samples obtained from 200 cows were measured using photon correlation spectroscopy and multiple regression analysis was used to find relationship between variables. CN micelle diameter, SCC and nonfat solids were different between animals with different H olstein crossbreed ratios, which suggests influence of genetic factors, mammary gland health and milk composition. Overall, results indicate the potential use of CN micelle diameter as a tool to select animals to produce milk more suitable to cheese production.