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Nutritional regulation of milk fat synthesis.
A more complete identification of these naturally produced inhibitors of fat synthesis and delineation of cellular mechanisms may offer broader opportunities for application and understanding of the regulation of lipid metabolism. Expand
Partitioning of nutrients during pregnancy and lactation: a review of mechanisms involving homeostasis and homeorhesis.
While not definitively established, roles for placental lactogen and prolactin are attractive possibilities in homeorhetic regulation of maternal tissues to support pregnancy and the initiation of lactaion, respectively. Expand
Identification of the conjugated linoleic acid isomer that inhibits milk fat synthesis.
Results demonstrate that trans-10,cis-12 CLA is the isomer responsible for inhibition of milk fat synthesis, and de novo synthesized fatty acids were extensively reduced. Expand
Trans-octadecenoic acids and milk fat depression in lactating dairy cows.
Dietary fiber concentration and type of fat had significant effects on milk fat, and the addition of unsaturated fat resulted in marked increases in the milk fat content of trans-11-octadecenoic acid, regardless of dietary fiber concentration; however, marked milk fat depression occurred only when the low fiber diet was supplemented with uns saturated fat. Expand
The effect of breed, parity, and stage of lactation on conjugated linoleic acid (CLA) in milk fat from dairy cows.
Milk fat content of CLA and the CLA-desaturase index were essentially independent of milk yield, milk fat percent, and milk fat yield, and it is speculated that the basis for the genetic variation among individuals is related to rumen output of trans-11 18:1 and to a lesser extent cis-9, trans- 11 CLA, and to the tissue amount and activity of delta9- Desaturase. Expand
Adaptations of Glucose Metabolism During Pregnancy and Lactation
  • A. Bell, D. Bauman
  • Biology, Medicine
  • Journal of Mammary Gland Biology and Neoplasia
  • 1 July 1997
Somatotropin is almost certainly a predominant homeorhetic influence during lactation because its exogenous administration causes specific changes in glucose metabolism (and many other functions) of various nonmammary tissues which faithfully mimic normal adaptations to early lactation. Expand
The environmental impact of dairy production: 1944 compared with 2007.
To fulfill the increasing requirements of the US population for dairy products, it is essential to adopt management practices and technologies that improve productive efficiency, allowing milk production to be increased while reducing resource use and mitigating environmental impact. Expand
Conjugated Linoleic Acid Is Synthesized Endogenously in Lactating Dairy Cows by Δ9-Desaturase
Results demonstrate that endogenous synthesis of CLA from trans-11 18:1 represented the primary source of CLA in milk fat of lactating cows. Expand