Search Results - "Backwell, F.R.C."

Current concepts of amino acid and protein metabolism in the mammary gland of the lactating ruminant by Bequette, B J, Backwell, F R, Crompton, L A

“…Milk protein responses to protein nutrition are typically poor and, in part, may be due to the low efficiency (approximately 25 to 30%) of converting dietary N…”
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Vascular sources of phenylalanine, tyrosine, lysine, and methionine for casein synthesis in lactating goats by Bequette, B J, Backwell, F R, Kyle, C E, Calder, A G, Buchan, V, Crompton, L A, France, J, MaCrae, J C

“…The contribution to casein biosynthesis of peptides derived from blood was examined in late lactation goats (254 to 295 d in milk). Ratios of mammary uptake of…”
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Effect of intravenous amino acid infusion on leucine oxidation across the mammary gland of the lactating goat by Bequette, B J, Backwell, F R, MacRae, J C, Lobley, G E, Crompton, L A, Metcalf, J A, Sutton, J D

“…Changes in the kinetics of leucine in the mammary gland were examined in four lactating goats (25, 38, 45, and 135 DIM) that were given an i.v. infusion of a…”
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Peptide aminonitrogen transport by the lactating rat mammary gland by Shennan, D.B., Calvert, D.T., Backwell, F.R.C., Boyd, C.A.R.

“…Recent studies have shown that the lactating mammary gland is able to utilize plasma-derived dipeptides for milk protein synthesis. However, it was not clear…”
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The effect of dietary crude protein as protected soybean meal on mammary metabolism in the lactating dairy cow by Metcalf, J A, Wray-Cahen, D, Chettle, E E, Sutton, J D, Beever, D E, Crompton, L A, MacRae, J C, Bequette, B J, Backwell, F R

“…Metabolism in the mammary gland was related to changes in milk output in response to changes in dietary protein intake. Three diets of grass silage and…”
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The effect of supplementary protein on in vivo metabolism of the mammary gland in lactating dairy cows by Metcalf, J A, Beever, D E, Sutton, J D, Wray-Cahen, D, Evans, R T, Humphries, D J, Backwell, F R, Bequette, B J, MacRae, J C

“…Four lactating cows equipped with rumen and duodenal cannulas were fed a diet of grass silage and concentrates containing either 12.4 or 17.2% CP (DM basis) in…”
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Responses in milk constituents to intravascular administration of two mixtures of amino acids to dairy cows by Metcalf, J A, Crompton, L A, Wray-Cahen, D, Lomax, M A, Sutton, J D, Beever, D E, MacRae, J C, Bequette, B J, Backwell, F R, Lobley, G E

“…Four Holstein-Friesian cows were used to investigate the effects of intravascular infusions of AA mixtures on milk constituents. Cows were in wk 11 to 28 of…”
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Evidence for a Glycyl-Proline Transport System in Ovine Enterocyte Brush-Border Membrane Vesicles by Backwell, F.R.C., Wilson, D., Schweizer, A.

“…A peptide transport system in ovine enterocyte BBMV has been examined with glycyl-L-proline (Gly-Pro) as substrate. Transport is stimulated by an inwardly…”
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A Model for Quantifying the Contribution of Extracellularly-derived Peptides to Milk Protein Synthesis in the Ruminant Mammary Gland by France, J., Hanigan, M.D., Bequette, B.J., Metcalf, J.A., Beevers, D.E., Lobley, G.E., MacRae, J.C., Backwell, F.R.C.

“…A model based on the dual-labelled tracer technique of Backwell and co-workers is proposed which allows detailed resolution of isotope dilution data that can…”
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Application of a U-13C-labeled amino acid tracer in lactating dairy goats for simultaneous measurements of the flux of amino acids in plasma and the partition of amino acids to the mammary gland by Bequette, B J, Backwell, F R, Calder, A G, Metcalf, J A, Beever, D E, MacRae, J C, Lobley, G E

“…A preliminary study was conducted using lactating British Saanen goats (n = 5) at 109 to 213 d in milk that yielded 1.67 to 3.68 kg of milk/d to examine the…”
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Amino acid and peptide absorption across the ovine gastrointestinal tract: A dietary comparison by Bernard, Laurence, Mcrae, J.C., Wilson, D.L., Bruce, L., Backwell, F.R.C.

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Peptide absorption across the ovine gastrointestinal tract: A methodological comparison by Bernard, Laurence, Wilson, D.L., Buchan, V., Backwell, F.R.C.

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Metabolism of aminoacyl- p-nitroanilides by rat mammary tissue by Shennan, D.B, Backwell, F.R.C, Calvert, D.T

“…We have examined the metabolism of aminoacyl- p-nitroanilides by rat mammary tissue isolated from rats during late pregnancy, peak lactation and late…”
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Quantification of circulating peptides and assessment of peptide uptake across the gastrointestinal tract of sheep by Backwell, F.R.C, Hipolito-Reis, M, Wilson, D, Bruce, L.A, Buchan, V, MacRae, J.C

“…Gastrointestinal absorption of peptides was examined in sheep fed a forage-based diet. Peptide concentrations were determined in arterial, portal, and…”
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Evidence for the utilization of peptides for milk protein synthesis in the lactating dairy goat in vivo by Backwell, F.R.C. (University of Reading, UK.), Bequette, B.J, Wilson, D, Metcalf, J.A, Franklin, M.F, Beever, D.E, Lobley, G.E, MacRae, J.C

“…Precursors for milk protein synthesis have been examined in lactating dairy goats using arteriovenous difference and isotope kinetic techniques. Certain amino…”
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Utilization of dipeptides by the caprine mammary gland for milk protein synthesis by Backwell, F.R.C, Bequette, B.J, Wilson, D, Calder, A.G, Metcalf, J.A, Wray-Cahen, D, MacRae, J.C, Beever, D.E, Lobley, G.E

“…Specific use by the mammary gland in vivo of amino acids (AA) of peptide origin has been demonstrated in lactating dairy goats using a dual-labeled tracer…”
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An isotope dilution model for partitioning leucine uptake by the bovine mammary gland by France, J, Bequette, B.J, Lobley, G.E, Metcalf, J.A, Wray-Cahen, D, Dhanoa, M.S, Backwell, F.R.C, Hanigan, M.D, Macrae, J.C, Beever, D.E

“…A model of leucine uptake and partition by the mammary gland (i.e. the udder) of the lactating dairy cow is constructed and solved in the steady state. Model…”
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The effect of free amino acid supply on the contribution of peptide-bound phenylalanine and tyrosine to casein synthesis in late lactation goats by Bequette, B.J., Backwell, F.R.C., Kyle, C.E., Calder, A.G., Crompton, L.A., France, J., MacRae, J.C.

“…The mammary gland of lactating ruminants (Guinard & Rulquin 1994) does not appear to extract sufficient quantities of free amino acids (AA) to account for…”
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The effect of free amino acid supply on the contribution of peptide-bound phenylalanine and tyrosine to casein synthesis in late lactation goats by Bequette, B.J., Backwell, F.R.C., Kyle, C.E., Calder, A.G., Crompton, L.A., France, J., MacRae, J.C.

“…The mammary gland of lactating ruminants (Guinard & Rulquin 1994) does not appear to extract sufficient quantities of free amino acids (AA) to account for…”
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A Possible Role for Peptides as Precursors for Milk Protein Synthesis by Backwell, F.R.C., Metcalf, J A, Bequette, B J, Lobley, G E, Beever, D E, MacRae, J C

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