Concentrations and Flow of Free Amino Acids in Ruminal and Duodenal Liquid of Dairy Cows in Relation to Feed Composition, Time of Feeding and Level of Feed Intake

2001 ◽  
Vol 51 (1) ◽  
pp. 35-45 ◽  
Author(s):  
Harald Volden ◽  
Weiert Velle ◽  
Øystein V. Sjaastad ◽  
Arnfinn Aulie ◽  
Odd Magne Harstad
Keyword(s):  
Amino Acids ◽  
Dairy Cows ◽  
Feed Intake ◽  
Free Amino Acids ◽  
Free Amino ◽  
Feed Composition ◽  
Time Of Feeding

Effects of abomasal infusions of sodium caseinate, a hydrolysate of casein or a corresponding mixture of free amino acids on milk yield and composition in dairy cows

1995 ◽  
Vol 62 (1) ◽  
pp. 29-37 ◽  
Author(s):  
Jai-Jun Choung ◽  
David G. Chamberlain
Keyword(s):  
Amino Acids ◽  
Dairy Cows ◽  
Free Amino Acids ◽  
Free Amino ◽  
Milk Protein ◽  
Bioactive Peptides ◽  
Basal Diet ◽  
Sodium Caseinate ◽  
Amino Acid Residues ◽  
Kinetics Of

SummaryThe effects of the form in which amino acids are presented to the abomasum on the milk production of dairy cows receiving a basal diet of grass silage and a barley-based supplement were examined in two experiments. Effects of abomasal infusions of sodium caseinate were compared with the effects of corresponding levels of either an enzymic hydrolysate of casein (Expt 1) or a corresponding mixture of free amino acids (FAA; Expt 2). In Expt 1, although the yield of protein in milk increased progressively with each level of infusion, the yields of protein were greater for the caseinate than for the hydrolysate. Again, in Expt 2, for milk protein yield, sodium caseinate was superior to FAA at the lower level of infusion. In both experiments, the hydrolysate and FAA treatments were associated with higher concentrations of fat in the milk. There were indications of differences in the pattern of secretion of glucagon between the caseinate and FAA treatments. It is concluded that the differences between treatments relate either to the kinetics of absorption of amino acid residues or to the action of bioactive peptides released during digestion of casein.

scholarly journals Omasal Flow of Soluble Proteins, Peptides, and Free Amino Acids in Dairy Cows Fed Diets Supplemented with Proteins of Varying Ruminal Degradabilities

2007 ◽  
Vol 90 (4) ◽  
pp. 1887-1903 ◽  
Author(s):  
S.M. Reynal ◽  
I.R. Ipharraguerre ◽  
M. Liñeiro ◽  
A.F. Brito ◽  
G.A. Broderick ◽  
...  
Keyword(s):  
Amino Acids ◽  
Dairy Cows ◽  
Free Amino Acids ◽  
Free Amino ◽  
Soluble Proteins

Krill hydrolysate free amino acids responsible for feed intake stimulation in Atlantic salmon (Salmo salar)

2013 ◽  
Vol 19 ◽  
pp. 47-61 ◽  
Author(s):  
K. Kousoulaki ◽  
I. Rønnestad ◽  
H.J. Olsen ◽  
R. Rathore ◽  
P. Campbell ◽  
...  
Keyword(s):  
Amino Acids ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Feed Intake ◽  
Free Amino Acids ◽  
Free Amino ◽  
Atlantic Salmon Salmo Salar

scholarly journals Pre- and post-calving plasma-free amino acids in high-yielding dairy cows

1994 ◽  
Vol 43 (3) ◽  
pp. 306-306
Author(s):  
G. Piva ◽  
F. Masoero ◽  
L. Fiorentini ◽  
M. Moschini
Keyword(s):  
Amino Acids ◽  
Dairy Cows ◽  
Free Amino Acids ◽  
Free Amino ◽  
Plasma Free Amino Acids

Effect of Rumen-Protected Methionine on Plasma Free Amino Acids and Production by Dairy Cows

1984 ◽  
Vol 114 (12) ◽  
pp. 2221-2227 ◽  
Author(s):  
Andreas M. Papas ◽  
John L. Vicini ◽  
Jimmy H. Clark ◽  
Sarah Peirce-Sandner
Keyword(s):  
Amino Acids ◽  
Dairy Cows ◽  
Free Amino Acids ◽  
Free Amino ◽  
Plasma Free Amino Acids

scholarly journals Evaluation of Whole Blood and Plasma in the Interorgan Supply of Free Amino Acids for the Mammary Gland of Lactating Dairy Cows

2000 ◽  
Vol 83 (6) ◽  
pp. 1300-1309 ◽  
Author(s):  
T.R. Mackle ◽  
D.A. Dwyer ◽  
K.L. Ingvartsen ◽  
P.Y. Chouinard ◽  
D.A. Ross ◽  
...  
Keyword(s):  
Amino Acids ◽  
Mammary Gland ◽  
Dairy Cows ◽  
Whole Blood ◽  
Free Amino Acids ◽  
Free Amino ◽  
Lactating Dairy Cows

scholarly journals On the amino acids in the urine of dairy cows fed urea as the sole or partial source of nitrogen

1977 ◽  
Vol 49 (4) ◽  
pp. 258-263
Author(s):  
Matti Kreula ◽  
Terttu Ettala
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Dairy Cows ◽  
Free Amino Acids ◽  
Free Amino ◽  
Ammonium Nitrogen ◽  
Important Amino Acid ◽  
Total Free Amino Acids ◽  
The Difference ◽  
Urinary Amino

The urinary amino acids in free and bound form were determined quantitatively in dairy cows fed urea and ammonium nitrogen as the sole (0-cows) or partial (ULP-cows) source of nitrogen. For comparison, amino acid determinations were performed also on the urine of cows on ordinary silage-cereals feed and pasture feed (NorP-cows). The total amount (mg/1 urine) of the free amino acids was the smallest with 0-cows and the highest with NorP-cows on pasture feeding. The difference was mainly due to glycine ,which was found in significantly higher (P < 0.001) amounts with NorP-cows on pasture feeding. The proportion of glycine in the total identified free amino acids was 9.7 ± 9.0 % with 0-cows, 13.5 ± 5.1 % with ULP-cows, 7.7 ±3.4 % with NorP-cows on indoor feeding and 56.4 ±21.0 % with NorP-cows on pasture feeding. The corresponding figures for glutamic acid, which was quantitatively the most important amino acid with 0- and ULP-cows, were 36.5 ± 29.6 %, 19.8 ± 19.2 %, 5.7 ±4.0 % and 3.9 ± 2.1 % of the total free amino acids. Besides the identified amino acids, there were a number of unidentified amino acid derivatives in the free amino acid fraction in all the feeding groups. The total amount of amino acids freed by hydrolysis was the lowest with 0-cows. The proportion of glycine of the amino acids of the hydrolysate was48 % with 0-cows, 66 % with ULP-cows and 84 % with NorP-cows.

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