What question did this study set out to answer?

To evaluate seasonal variations in milk fat melting curves and establish their relationship with fatty acid composition across a dairying season.

Seasonal variations in the composition and thermal properties of New Zealand milk fat: II. Thermal properties of milk fat and their relation to composition

View Full Paper

Ask AI

Bookmark

Authors

Observational analysis reveals fatty acid profiles govern milk fat melting behavior, indicating combined lipid classes dictate physical firmness.

To evaluate seasonal variations in milk fat melting curves and establish their relationship with fatty acid composition across a dairying season.
Measured melting profiles and liquid-fat fractions across temperatures using differential scanning calorimetry on 17 milk fat samples collected at approximately fortnightly intervals over one dairying season.
Assessed associations between thermal parameters (liquid-fat percentages at 12 °C and 22 °C, softening point) and fatty acid groups using linear correlation and multiple regression models.
Liquid-fat percentage at 12 °C and 22 °C correlated weakly to moderately with short-chain fatty acids (r = 0.45 and 0.58) and cis-unsaturated acids (r = 0.39 and 0.29) individually, but combined fractions showed stronger associations (sum: r = 0.71 and 0.68; multiple regression: R = 0.75 and 0.78).
Milk fat softening point correlated strongly with weight percentage of long-chain saturated fatty acids (r = 0.79) and with the temperature at which 94% of the fat was liquid (r = 0.75).

Norris et al. (1973) studied this question.

View Full Paper

Ask AI

Bookmark

Observational analysis reveals fatty acid profiles govern milk fat melting behavior, indicating combined lipid classes dictate physical firmness.