Morphometric analysis of fat globules in ewe's milk and correlation with qualitative parameters
- 1 January 2004
- journal article
- Published by Taylor & Francis Ltd in Italian Journal of Animal Science
- Vol. 3 (1), 55-60
- https://doi.org/10.4081/ijas.2004.55
Abstract
In this study the morphometric characteristics of fat globules from ewe’s milk have been correlated with the chemical and technological parameters of the milk. Milk samples were taken from twenty-five Massese ewes, subdivided according to the parity; the animals were homogeneous for lactation phase and diet. The morphometric analysis of fat globules (n./ml, diameter, surface area/volume), the standard chemical analysis, SCC and determination of the rheological parameters were performed on milk samples obtained during the morning milking. The mean number of fat globules/ml was 3.09 x 109, with a mean diameter of 3.93 μm, ranging from 1.20 μm to 12.30 μm. For all parities, a fat globule diameter ranging from 3.21 to 4.20 μm was found most frequently. Animals in the first lambing order showed a significantly lower percentage (5.26%) of large globules (>5.21μm), while animals in the fifth lambing order showed a higher percentage (20.75%). The number of globules/ml was negatively correlated to milk production (P≤0.01) and curd firmness at 45 min (P≤0.05); whereas it was positively correlated to protein content, non-fat dry matter, and curd firming time (P≤0.05). Fat globule dimensions varied according to the parity of the animals and influenced various qualitative parameters of the milkKeywords
This publication has 10 references indexed in Scilit:
- Évolution des connaissances sur la membrane du globule gras du lait : synthèse bibliographiqueLe Lait, 2000
- Origin and Secretion of Milk LipidsJournal of Mammary Gland Biology and Neoplasia, 1998
- Caractérisation de l'aptitude fromagère des laits de brebis Lacaune à l'aide d'un FormagraphLe Lait, 1994
- The Composition of Milk FatJournal of Dairy Science, 1991
- Milk fat globules: Fatty acid composition, size and in vivo regulation of fat liquidityLipids, 1988
- Physical Equilibria: Lipid PhasePublished by Springer Science and Business Media LLC ,1988
- Comparison of the fat content and fat globule size distribution of breast milk from mothers delivering term and pretermThe American Journal of Clinical Nutrition, 1984
- Reviews of the progress of Dairy Science: The bovine milk fat globule membrane–its formation, composition, structure and behaviour in milk and dairy productsJournal of Dairy Research, 1983
- The fat globule size distribution in human milkBiochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism, 1981
- The Milk fat globule membraneBiochimica et Biophysica Acta (BBA) - Reviews on Biomembranes, 1975