Grasa y proteína de la leche de vaca: componentes, síntesis y modificación

Garcia, Cyrielle; Montiel, R.; Borderas, T. F.

doi:10.21071/az.v63i241.592

Cited by 15 publications

(24 citation statements)

References 78 publications

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“…Such variations may be attributable in the prepartum period to a high level of body reserves and absence of milk synthesis, conditions that allow to the animal to face the delivery and initiation of production; however, lowering serum triglyceride level arising subsequently, reflects the energy deficit which is exposed the cow and as a normal process, it takes the necessary energy from the oxidation of triglycerides that has reserved in adipose tissue, which has in its structural conformation, glycerol, and triglycerides (Duque et al, 2011). From day 45 postpartum, it was observed that levels rose, as the cow stabilizes its energy status and the triglycerides increase to be transported in chylomicrons and in very low-density lipoprotein, to mammary gland, to synthesize preformed fatty acids (palmitic and stearic) (García et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

Metabolic and reproductive response to energy supplementation in dairy cows in tropical highlands

David

Gaona

Apraez

et al. 2018

rcia

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Dairy farms of the department of Nariño present nutritional concerns, especially in the transition period and early lactation, because of the energy imbalance of the diets, which causes deficiencies in the productive and reproductive activity of the cows. According to the above, the main idea was to study the metabolic behavior in the transition period and early lactation of dairy cows supplemented energetically with bypass fat in the tropical highlands of Nariño (Colombia), 21 cows (Holstein x Simmental cross) of second and third lactation period were selected. They were distributed in three treatments with seven animals each; the control treatment (T1) received a base diet (forage + concentrate) without fat supplementation; the second treatment (T2) had a base diet plus 250 g/day of bypass fat and the third (T3) had a base diet plus 250 g/day bypass fat enriched with omega 3. The experimental period ranged between days 15 of prepartum to day 105 of lactation, with an interval of 15 days among sampling. To evaluate the matabolyc performance, we evaluated in serum: non-esterified fatty acids (NEFA), betahydroxybutyrate (BHB), cholesterol, triglycerides, glucose, total proteins, albumin, BUN, and globulins. In addition, body condition and reproductive behavior were determined. The results indicated that there was no efect of treatments on metabolic performance, body condition, and reproductive activity. The energy indicators showed no changes, indicating an adequate supply energy supply in the diet; however, in the metabolites associated to nitrogen, differences in protein were observed. The values found in the variables, constitute a reference of the behavior and the nutritional conditions of the dairy farms in the region.

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Section: Resultsmentioning

confidence: 99%

Metabolic and reproductive response to energy supplementation in dairy cows in tropical highlands

David

Gaona

Apraez

et al. 2018

rcia

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“…In this regard, other articles found values of 0.67 and 0.7 kg of protein (13,14) , values close to those found in the present investigation. Various authors state that the protein concentration of milk does not present outstanding changes with nutritional manipulation (19) . However, the effect of soybean meal on nitrogen use and protein production in Holstein cows has been evaluated, reaching conclusions that milk and protein yield do not show an increase with a supplementation level of soybean meal higher than 16.5 %.…”

Section: Discussionmentioning

confidence: 99%

“…In a separate investigation, the author suggested that knowledge of genetic variability could be useful when altering the composition of milk protein, since the estimation of the genetic parameters of the six main milk proteins determined by capillary electrophoresis in zone are highly related (21) . According to García et al (19) , this information suggests the possibility of modifying the protein composition of cow's milk through selective breeding, which in turn offers the opportunity to satisfy the new consumer demands.…”

Section: Discussionmentioning

confidence: 99%

“…Casein results reported an average value of 0.454 kg, which in contrast to that found by other authors with values of 2.4 %, presents a desirable and superior casein value of within milk production (22) . Recent research claims that casein constitutes about 78 % of milk proteins, and precipitate when the milk is acidified to a pH of 4.6 (19) . They also state that casein is mainly linked to calcium phosphate Ca3(PO4)2 in a solid and spongy structure called casein micelle, an important component for cheese making.…”

Section: Discussionmentioning

confidence: 99%

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Relationship of the compositional content and sanitary quality of Holstein cows’ milk of the high tropic of Nariño

Jurado-Gámez

Solarte-Portilla

Burgos-Arcos

et al. 2020

Rev. Mex. Cienc. Pecu.

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Agricultural production seeks to obtain high quality, safe products for human consumption-a great concern for the dairy chain. The present investigation seeks to identify the correlation between the compositional and sanitary quality of raw milk (SCC/mL). The investigation was carried out in three districts of the Department of Nariño, Colombia. For this purpose, sampling and information collection was executed throughout the years 2016 and 2017. To determine the relationship between composition and sanitary quality, an analysis was made of the principal components of the milk, and a design of mixed models was creating using selected variables. The analysis showed that there is a relationship between the compositional variables, and the mixed model indicated that there is a significant relationship between the somatic cell count and the milk quality of the region. It was concluded that a somatic cell count above 500,000 CFU/mL has negative effects on protein, casein, and milk production.

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“…Por otro lado, el metilpalmitato mostró un comportamiento similar a lo que indica la literatura (25%), ya que estuvo en concentración de 27.9% (suplementadas) y 24.81% (no suplementadas). Las diferencias encontradas se indica que corresponden a diferencias metabólicas ruminales asociadas con los diferentes tipos de dietas (García et al, 2014).…”

Section: Discussionunclassified

Efecto de la Suplementación con Medicago sativa (Alfalfa) sobre Algunos Parámetros de la Leche Bovina

Carrillo

Cely

Vargas

2017

Rev. investig. vet. Perú

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RESUMENEl objetivo de este trabajo fue determinar si la suplementación con alfalfa en vacas en producción podría generar un efecto antioxidante y modificar la composición de los áci-dos grasos de la leche. Se utilizaron 19 vacas distribuidas en un grupo tratado (suplementado con alfalfa; n=11) y un grupo control (n=8). Se determinó el nivel de oxidación de la grasa de la leche (prueba de jabón de cobre), la calidad composicional y la presencia de ácidos grasos (cromatografía de gases) en la leche. La grasa de la leche de los animales suplementados mostró mayor estabilidad y menor oxidación respecto al grupo control, mostrando un efecto antioxidante, aun en aquella leche que se mantuvo 14 días a temperatura ambiente. Asimismo, hubo aumento de ácidos grasos poliinsaturados y disminución de los saturados, y aumento del porcentaje de grasa total de la leche. Se concluye que la suplementación con alfalfa da mayor estabilidad a la grasa de la leche por su efecto antioxidante y mejora la proporción de ácidos grasos poliinsaturados con disminución de los saturados, lo cual podría ser más benéfico para la salud del consumidor.Palabras clave: grasa; oxidación; lucerna; flavonoides ABSTRACTThe aim of this study was to determine whether alfalfa supplementation in milking cows could generate an antioxidant effect and modify the composition of milk fatty acids. Nineteen cows were distributed in a treated group (supplemented with alfalfa; n=11) and a control group (n=8). The level of oxidation of milk fat (copper soap test), compositional quality and the presence of fatty acids (gas chromatography) in milk were determined. The

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Grasa y proteína de la leche de vaca: componentes, síntesis y modificación

Cited by 15 publications

References 78 publications

Metabolic and reproductive response to energy supplementation in dairy cows in tropical highlands

Metabolic and reproductive response to energy supplementation in dairy cows in tropical highlands

Relationship of the compositional content and sanitary quality of Holstein cows’ milk of the high tropic of Nariño

Efecto de la Suplementación con Medicago sativa (Alfalfa) sobre Algunos Parámetros de la Leche Bovina

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