02290naa a2200253 a 450000100080000000500110000800800410001902400850006010000170014524501170016226000090027950000200028852015040030865000160181265000120182865300220184065300270186265300150188965300190190465300250192370000160194870000140196477300580197815178872026-01-15       1997    bl uuuu     u00u1 u    #d7 ahttps://doi-org.ez103.periodicos.capes.gov.br/10.1016/S0921-4488(96)00941-82DOI1 aCHANG, C. J.  aChanges in apparent mammary uptake of blood metabolites during involution in dairy goats.h[electronic resource]  c1997  aTechnical note.  aAbstract: Six goats, three multiparous lactating and three non-pregnant dry dairy goats were used to examine the changes in plasma concentrations of metabolites and concentration differences between jugular and mammary veins during involution stages as compared to lactation stage. Jugular concentrations of glucose and FFA were not different between stages, while jugular concentrations of acetate and triglycerides were higher (P &lt 0.01) and β-hydroxybutyrate was lower (&lt 0.01) during involution. Differences in plasma glucose, acetate, β-hydroxybutyrate and triglycerides between jugular and mammary veins were lower (P &lt 0.01) during involution indicating decreases in mammary uptake of these metabolites. In terms of amounts, glucose was the most important precursor for the lactating glands; an average of approximately 14.6 mg glucose was taken per 100 ml plasma flow through the glands; while acetate (2.37 mg dl−1) and β-hydroxybutyrate (0.17 mg dl−1) were the major precursors for the dry glands. Jugular plasma concentrations and jugular-mammary differences (apparent mammary uptake) for all five metabolites show strong linear relationships during lactation, while jugular concentrations of β-hydroxybutyrate and triglycerides become independent of their apparent mammary uptake during involution. Therefore, changes in pattern and mechanisms of metabolites taken up by the mammary gland probably occurred for dairy goats during involution rather than the lactation stage.  aDairy goats  aCaprino  aBlood metabolites  aFisiologia da nutricao  aInvolution  aMammary uptake  aMetabolito sanguineo1 aCHEN, C. F.1 aWU, C. P.  tSmall Ruminant Researchgv. 24, n. 1, p. 49-54, 1997.