Bovine Milk Fatty Acid and Triacylglycerol Composition and Structure Differ between Early and Late Lactation Influencing Milk Fat Solid Fat Content

2021 ◽  
Author(s):  
Sara Liliana Pacheco ◽  
Sine Yener ◽  
Roselinde Goselink ◽  
Maria Ximena Quintanilla-Carvajal ◽  
Hein Van Valenberg ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Milk Fat ◽  
Bovine Milk ◽  
Solid Fat Content ◽  
Fat Content ◽  
Milk Fatty Acid ◽  
Triacylglycerol Composition ◽  
Solid Fat ◽  
Composition And Structure

scholarly journals Milk fatty acid profile from grazing buffaloes fed a blend of soybean and linseed oils

2015 ◽  
Vol 67 (3) ◽  
pp. 927-934 ◽  
Author(s):  
G.A. Gagliostro ◽  
E.M. Patiño ◽  
M. Sanchez Negrette ◽  
G. Sager ◽  
L. Castelli ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Milk Fat ◽  
Nutritional Value ◽  
Milk Protein ◽  
Vaccenic Acid ◽  
Total Content ◽  
Experimental Period ◽  
Fat Content ◽  
Milk Fatty Acid ◽  
Milk Protein Content

The aim of the study was to examine the changes in milk fatty acid (FA) profile of grazing buffaloes fed either low (L, 276g/d) or high (H, 572g/d) doses of a blend (70:30, wt/wt) of soybean and linseed oils. Fourteen multiparous Mediterranean buffaloes grazing on a native pasture were fed 4 kg/day of a commercial concentrate containing no supplemental oil over a pre-experimental period of ten days. The baseline milk production and composition and milk FA profile were measured over the last three days. After this pre-experimental period the animals received the same concentrate added with either the L or H oil doses for 26 additional days. Milk yield (g/animal/day) did not differ at the start (1776 ± 522 and 1662 ± 291 for L and H, respectively, P<0.622) or at the end of the trial (4590 ± 991 and 4847 ± 447 in L and H, respectively, P<0.543). Baseline milk fat content (g/kg) averaged 77.1 (±20.5) in L and 74.3 (±9.9) in H (P<0.10) and was reduced (P<0.031) to 60.7 (±23.6) and 49.4 (±11.2) (P<0.0031) respectively after L and H with no differences between treatments (P<0.277). Baseline milk protein content (L=43.2 ± 3.4 and H= 44.3 ± 6.9g/kg) increased after oil supplementation (P<0.0001) in both L (73.2 ± 6.0g/kg) and H (68.4 ± 4.9g/kg) without differences between oil doses (P<0.123). Milk fat content of 14:0 decreased after oil supplementation only in the H treatment (5.29 to 4.03, P<0.007) whereas that of 16:0 was reduced (P<0.001) at both L (24.49 to 19.75g/100g FA) and H (25.92 to 19.17g/100g FA) doses. The reduction of total content of 12:0 to 16:0 was higher (P<0.052) in H (32.02 to 23.93g/100g FA) than L (30.17 to 25.45g/100g FA). Vaccenic acid content increased (P<0.001) from 5.70 to 13.24g/100g FA in L and from 5.25 to 16.77 in H, with higher results in the in H treatment (P<0.001). Baseline rumenic acid was sharply increased (P<0.001) in L (1.80 to 4.09g/100g FA, +127%) and H (1.60 to 4.61g/100g FA, +187%) with no differences between L and H (P<0.19). Overall, these results indicate a pronounced improvement in the nutritional value of milk fat from grazing buffaloes fed little amounts (0.276g/day) of a blend of soybean and linseed oils.

Determination of the Solid Fat Content in Milk Fat by Gas Chromatographic Triglyceride Analysis

Lipid / Fett ◽  
1994 ◽  
Vol 96 (9) ◽  
pp. 324-330 ◽  
Author(s):  
D. Precht ◽  
E. Frede
Keyword(s):  
Milk Fat ◽  
Solid Fat Content ◽  
Fat Content ◽  
Solid Fat ◽  
Triglyceride Analysis

Partial coalescence in emulsions: The impact of solid fat content and fatty acid composition

2015 ◽  
Vol 117 (10) ◽  
pp. 1627-1635 ◽  
Author(s):  
Merete B. Munk ◽  
Mogens L. Andersen
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Solid Fat Content ◽  
Fat Content ◽  
Solid Fat ◽  
Partial Coalescence ◽  
The Impact

Raman spectroscopic prediction of the solid fat content of New Zealand anhydrous milk fat

2009 ◽  
Vol 1 (1) ◽  
pp. 29 ◽  
Author(s):  
C. M. McGoverin ◽  
A. S. S. Clark ◽  
S. E. Holroyd ◽  
K. C. Gordon
Keyword(s):  
New Zealand ◽  
Milk Fat ◽  
Solid Fat Content ◽  
Fat Content ◽  
Anhydrous Milk Fat ◽  
Solid Fat ◽  
Raman Spectroscopic

Effects of induced subacute ruminal acidosis on milk fat content and milk fatty acid profile

2008 ◽  
Vol 92 (3) ◽  
pp. 284-291 ◽  
Author(s):  
F. Enjalbert ◽  
Y. Videau ◽  
M. C. Nicot ◽  
A. Troegeler-Meynadier
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Profile ◽  
Milk Fat ◽  
Fat Content ◽  
Milk Fatty Acid ◽  
Subacute Ruminal Acidosis ◽  
Ruminal Acidosis

At-Line Near-Infrared Spectroscopy for Prediction of the Solid Fat Content of Milk Fat from New Zealand Butter

2007 ◽  
Vol 55 (8) ◽  
pp. 2791-2796 ◽  
Author(s):  
Lucy P. Meagher ◽  
Stephen E. Holroyd ◽  
David Illingworth ◽  
Frank van de Ven ◽  
Susan Lane
Keyword(s):  
Infrared Spectroscopy ◽  
New Zealand ◽  
Near Infrared Spectroscopy ◽  
Milk Fat ◽  
Near Infrared ◽  
Solid Fat Content ◽  
Fat Content ◽  
Solid Fat

325 The Diagnosis of Sub-acute Ruminal Acidosis (SARA) in Dairy Cows on Commercial Farms Using the Milk Fatty Acid Profile

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 174-175
Author(s):  
Jan C Plaizier ◽  
Sharon Y Mowete ◽  
Debora Santchi ◽  
Ken Kwiatkowski ◽  
Nympha De Neve ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Fatty Acid Profile ◽  
Milk Fat ◽  
De Novo ◽  
Dairy Farms ◽  
Fat Content ◽  
Dietary Factors ◽  
Milk Fatty Acid ◽  
Ruminal Acidosis

Abstract The accuracy of the milk fatty acid profile as a diagnostic tool for the diagnosis of sub-acute ruminal acidosis (SARA) has been determined when SARA was experimentally induced. This had not yet been done not on commercial dairy farms, where SARA can occur naturally. The objective of this study was to determine this accuracy in individual cows on commercial dairy farms. A total of 336 cows from 24 commercial dairy farms in Quebec were included. Farms were blocked based on geographical location and management, with each block having one high risk SARA farm and one low risk SARA farm. Farm Risk of SARA was determined based on the milk fat content and the proportions of de novo fatty acids and long chain unsaturated fatty acids in the bulk tank. On each farm, 7 early/mid-lactation (&lt; 150 days in milk DIM) and 7 mid/late lactation (&lt; 150 DIM) cows were randomly selected. The fatty acid profile of pooled milk samples from these cows were determined by gas chromatography. Farm risk of SARA did not affect the milk fat proportion of fatty acids, with the exception of trans 10 cis 12 C18:2, which was higher in At Risk Farms. Later lactation cows had a higher milk fat content and higher milk fat proportions of de novo, C16 fatty, and odd and branch chain fatty acids. The prevalence of SARA was likely higher in earlier lactation cows than in later lactation cows, but non-SARA related animal and dietary factors also affect the milk fatty acid profile. Hence, the milk fatty acid profile alone may not be accurate enough to diagnose SARA on farm. This profile can, however, contribute to this diagnosis, the identification of causes of milk fat depression, and the development of strategies to optimize the milk fatty acid profile.

Physical properties of milk fat: I. Influence of chemical modification

1961 ◽  
Vol 28 (1) ◽  
pp. 81-86 ◽  
Author(s):  
J. M. de Man
Keyword(s):  
Chemical Modification ◽  
Physical Properties ◽  
Milk Fat ◽  
Solid Fat Content ◽  
Fat Content ◽  
Glyceride Structure ◽  
High Melting ◽  
Solid Fat ◽  
Unsaturated Acyl ◽  
High Melting Glycerides

SummaryInteresterification of milk fats resulted in increased softening points, hardness and high melting glycerides (HMG). Increasing the content of trans-unsaturated acyl groups in milk fat resulted in increased softening points and hardness. While the increased solid fat content after interesterification occurred mostly at the higher measuring temperatures, the increase due to isomerization occurred mainly at the lower measuring temperatures. However, in both cases hardness was increased at all measuring temperatures. These results indicate that glyceride structure and trans-unsaturated acyl content influence the physical properties of the solidified fat.

Effects of dietary cottonseed oil and tannin supplements on protein and fatty acid composition of bovine milk

2014 ◽  
Vol 81 (2) ◽  
pp. 183-192 ◽  
Author(s):  
Aprianita Aprianita ◽  
Osaana N Donkor ◽  
Peter J Moate ◽  
S Richard O Williams ◽  
Martin J Auldist ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Fatty Acid Profile ◽  
Milk Fat ◽  
Protein Concentration ◽  
Condensed Tannin ◽  
Bovine Milk ◽  
Cottonseed Oil ◽  
Milk Fatty Acid ◽  
Acacia Mearnsii

This experiment was conducted to determine the effects of diets supplemented with cottonseed oil,Acacia mearnsii-condensed tannin extract, and a combination of both on composition of bovine milk. Treatment diets included addition of cottonseed oil (800 g/d; CSO), condensed tannin fromAcacia mearnsii(400 g/d; TAN) or a combination of cottonseed oil (800 g/d) and condensed tannin (400 g/d; CPT) with a diet consisting of 6·0 kg dry matter (DM) of concentrates and alfalfa hay ad libitum, which also served as the control diet (CON). Relative to the CON diet, feeding CSO and CPT diets had a minor impact on feed intake and yield of lactose in milk. These diets increased yields of milk and protein in milk. In contrast to the TAN diet, the CSO and CPT diets significantly decreased milk fat concentration and altered milk fatty acid composition by decreasing the proportion of saturated fatty acids but increasing proportions of monounsaturated and polyunsaturated fatty acids. The CPT diet had a similar effect to the CSO diet in modifying fatty acid profile. Overall, reduction in milk fat concentration and changes in milk fatty acid profile were probably due to supplementation of linoleic acid-rich cottonseed oil. The TAN diet had no effect on feed intake, milk yield and milk protein concentration. However, a reduction in the yields of protein and lactose occurred when cows were fed this diet. Supplemented tannin had no significant effect on fat concentration and changes in fatty acid profile in milk. All supplemented diets did not affect protein concentration or composition, nitrogen concentration, or casein to total protein ratio of the resulting milk.

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