Age related changes in lipid, collagen and hydroxypyridinium contents related to bovine Nelore Rhomboideus m. (Bos indicus) texture

摘要

The aim of this work was to relate the influence of advance in age in relation to lipid and collagen and its crosslink hydroxypyridinium contents with texture in hump muscle, Rhomboideus m from bovine Nelore. Samples were taken in triplicate from 18, 24,36, 48 months of age. The results for the lipid content were 16.77; 50.39; 3.76 and 14.22% for animals of 18, 24, 36, 48mo of age, respectively. These inconsistent values reflect the variability of the muscle in relation to season and management of the animals grown as free range livestock in a farm. However, the values for collagen and its crosslink increased with advance in age of the animals. Collagen contents were 0.84, 1.70, 5.99 and 6.67% and hydroxypyridinium concentration was 0.37, 0.42, 0.52 and 1.12 mol/mol of collagen for animals at the age of 18, 24, 36 and 48 months, respectively. Shear force values were 10.29; 5.79; 14.22 and 11.09 kgf for the age of 18, 24, 36 and 48 months, respectively. These results showed that in samples with high concentration of intramuscular fat, the presence of collagen and its crosslinks is not relevant but the total amount of lipid dictates the final texture irrespective of the animal age.