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Scientific Advances in Animal Nutrition Promise for the New Century: Proceedings of a Symposium (2001) / Chapter Skim
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4 Metabolic Modifiers: Advances in Economic Production of Safe Food
Pages 26-31

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From page 26...
... , if the digestive process is altered by the metabolic modifier, then specific nutrient dietary concentrations should be altered in direct proportion to changes in digestibility. If other dimensions of animals performance are affected, then the phase II (Figure 4-2)
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From page 27...
... SOMATOTROPIN INCREASES MILK PRODUCTION This flow chart (Figure 4-1) can be effectively applied to somatotropin, a 190- or 191-amino acid homeorhetic molecule that coordinates metabolism and controls nutrient flow to support a specific physiologic state (McGuire and Bauman, 1997~.
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From page 28...
... This is because during lactation, the secretion rate of somatotropin from the pituitary gland is higher in high producing dairy cows (Hart et al., 1980~. Injecting somatotropin in lactating dairy cows mimics rate of genetic progression.
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From page 29...
... One of several models developed to estimate n~minant protein requirements is The Cornell Net Carbohydrate and Protein System. Data for this model were developed by using actual net protein requirements as a baseline and then infusing casein into the abomasum to increase protein availability until the observed and predicted increase in actual protein were the same.
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From page 30...
... Milk yield responses to placental lactogen are not as pronounced as with somatotropin, but feed intake is increased through its prolactin-like action. Because of the increase in feed intake, net energy balance is increased in lactating dairy cows treated with bovine placental lactogen.
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From page 31...
... Dietary conjugated linoleic acids increase lean tissue and decrease fat deposition in growing pigs.
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Key Terms

  • placental lactogen
  • nutrient requirements
  • milk yield
  • feed intake
  • dairy cows

  • bovine placental
  • lactating dairy
  • metabolic modifier
  • growing animals
  • conjugated linoleic

  • flow chart
  • mammary gland
  • producing dairy
  • growth hormone
  • energy balance

  • fat deposition
  • dairy cow
  • nutrient flow
  • linoleic acid
  • milk production

  • growing pigs
  • lean mass
  • lean muscle
  • muscle accretion
  • increases milk

  • improvement association
  • yield response
  • infusing casein
  • igfi availability
  • six pounds


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