scholarly journals Rumen Degradability and Small Intestinal Digestibility of the Amino Acids in Four Protein Supplements

2015 ◽  
Vol 29 (2) ◽  
pp. 241-249 ◽  
Author(s):  
Y. Wang ◽  
L. Jin ◽  
Q. N. Wen ◽  
N. K. Kopparapu ◽  
J. Liu ◽  
...  
Keyword(s):  
Amino Acids ◽  
Protein Supplements ◽  
Small Intestinal ◽  
Intestinal Digestibility

Small intestinal digestibility of microbial and endogenous amino acids in dairy cows

2001 ◽  
Vol 85 (1-2) ◽  
pp. 9-21 ◽  
Author(s):  
M. Larsen ◽  
T. G. Madsen ◽  
M. R. Weisbjerg ◽  
T. Hvelplund ◽  
J. Madsen
Keyword(s):  
Amino Acids ◽  
Dairy Cows ◽  
Endogenous Amino Acids ◽  
Small Intestinal ◽  
Intestinal Digestibility

Phytates reduce uptake of leucine and glutamate but not lysine and glucose from the intestinal lumen of chickens: Short communication

2008 ◽  
Vol 56 (4) ◽  
pp. 511-514 ◽  
Author(s):  
Edward Onyango ◽  
Elikplimi Asem ◽  
Olayiwola Adeola
Keyword(s):  
Amino Acids ◽  
Free Amino Acids ◽  
Free Amino ◽  
Short Communication ◽  
Intestinal Lumen ◽  
Depressive Effect ◽  
Leucine Uptake ◽  
Small Intestinal

An investigation into the influence of phytates on the in situ absorption of amino acids (lysine, glutamate and leucine) and glucose from the intestinal lumen of 3-week-old chickens was carried out. Birds were anaesthetised and the intestines exteriorised. Uptake of 5 mM of each nutrient over a 4-min period was measured in the presence of four phytate concentrations (0, 50, 250 and 500 mM). Five birds were used for each nutrient at each concentration of phytate tested. Leucine uptake decreased linearly (P < 0.001) and that of glutamate showed a tendency to decrease (P = 0.055) as the phytate concentration increased. Absorption of lysine and glucose were unaffected by the presence of phytate. In conclusion, phytate in the small intestinal lumen exerted a depressive effect on the absorption of specific free amino acids from the lumen. Its depressive effect was greatest for leucine followed by glutamate, and phytate had little effect on the absorption of lysine.

The use of chromic oxide as a marker for measuring small intestinal digestibility in cannulated dogs.

1996 ◽  
Vol 74 (7) ◽  
pp. 1629 ◽  
Author(s):  
R C Hill ◽  
C F Burrows ◽  
G W Ellison ◽  
J E Bauer
Keyword(s):  
Chromic Oxide ◽  
Small Intestinal ◽  
Intestinal Digestibility

Investigations on the use of the mobile bag technique in ponies

1996 ◽  
Vol 1996 ◽  
pp. 99-99
Author(s):  
J J Hyslop ◽  
D Cuddeford
Keyword(s):  
Pore Size ◽  
Digestive Tract ◽  
Mineral Supplement ◽  
Polyester Mesh ◽  
Grass Hay ◽  
Ad Libitum ◽  
Small Intestinal ◽  
Intestinal Digestibility

The mobile bag technique has been employed to study the small intestinal digestibility of feed components in ruminants and total tract digestibility values in pigs. This study reports some preliminary investigations on the use of mobile bags to estimate both total and partial tract digestibility values in ponies.Four caecally fistulated Welsh cross pony geldings (approx LW 250 kg) were offered ad libitum grass hay (DM: 918, CP: 73, NDF: 716) plus 30 g/h/d of a horse mineral supplement. Mobile bags were prepared from monofilament polyester mesh with a pore size of 41 um using a commercial heat sealer and were used to estimate the feed constituent digestibility of a commercial horse concentrate (DM: 918, CP: 151, NDF: 403) in both the total tract and post-ileal segments of the ponies digestive tract.

scholarly journals Inhibiting Methanogenesis Stimulated de novo Synthesis of Microbial Amino Acids in Mixed Rumen Batch Cultures Growing on Starch but not on Cellulose

2020 ◽  
Vol 8 (6) ◽  
pp. 799
Author(s):  
Emilio M. Ungerfeld ◽  
M. Fernanda Aedo ◽  
Camila Muñoz ◽  
Natalie L. Urrutia ◽  
Emilio D. Martínez ◽  
...  
Keyword(s):  
Amino Acids ◽  
De Novo ◽  
Nitrogen Sources ◽  
Environmental Benefits ◽  
De Novo Synthesis ◽  
Protein Nitrogen ◽  
Protein Supplements ◽  
Batch Cultures ◽  
Sufficient Energy ◽  
Ruminant Diets

Ameliorating methane (CH4) emissions from ruminants would have environmental benefits, but it is necessary to redirect metabolic hydrogen ([H]) toward useful sinks to also benefit animal productivity. We hypothesized that inhibiting rumen methanogenesis would increase de novo synthesis of microbial amino acids (AA) as an alternative [H] sink if sufficient energy and carbon are provided. We examined the effects of inhibiting methanogenesis with 9, 10-anthraquione (AQ) on mixed rumen batch cultures growing on cellulose or starch as sources of energy and carbon contrasting in fermentability, with ammonium (NH4+) or trypticase (Try) as nitrogen (N) sources. Inhibiting methanogenesis with AQ inhibited digestion with cellulose but not with starch, and decreased propionate and increased butyrate molar percentages with both substrates. Inhibiting methanogenesis with 9, 10-anthraquinone increased de novo synthesis of microbial AA with starch but not with cellulose. The decrease in the recovery of [H] caused by the inhibition of methanogenesis was more moderate with starch due to an enhancement of butyrate and AA as [H] sinks. There may be an opportunity to simultaneously decrease the emissions of CH4 and N with some ruminant diets and replace plant protein supplements with less expensive non-protein nitrogen sources such as urea.

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