scholarly journals A Collaborative Study to Evaluate a Precision-Fed Rooster Assay for True Amino Acid Availability in Feed Ingredients

1985 ◽  
Vol 64 (3) ◽  
pp. 487-498 ◽  
Author(s):  
HENRY M. ENGSTER ◽  
N.A. CAVE ◽  
H. LIKUSKI ◽  
J.M. McNAB ◽  
C.A. PARSONS ◽  
...  
Keyword(s):  
Amino Acid ◽  
Collaborative Study ◽  
Feed Ingredients ◽  
Amino Acid Availability

scholarly journals Amino acid availability of feed ingredients for poultry.

1986 ◽  
Vol 23 (3) ◽  
pp. 147-156 ◽  
Author(s):  
Masayoshi YAMAZAKI ◽  
Hachiro KAMATA
Keyword(s):  
Amino Acid ◽  
Feed Ingredients ◽  
Amino Acid Availability

Determination of Sulfur Amino Acids and Tryptophan in Foods and Food and Feed Ingredients: Collaborative Study

1988 ◽  
Vol 71 (3) ◽  
pp. 603-606
Author(s):  
Maryann C Allred ◽  
John L Macdonald
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Collaborative Study ◽  
Performic Acid ◽  
Cysteic Acid ◽  
Protein Hydrolysis ◽  
Sulfur Amino Acids ◽  
Feed Ingredients ◽  
Food And Feed

Abstract Samples of 4 foods, 1 animal feed, isolated soy protein, and 0-lao toglobulin were analyzed by 9 laboratories to determine concentrations of cysteine as cysteic acid, methionine as methionine sulfone, and tryptophan. Sulfur amino acids were determined by AOAC method 43.A08-43.A13 for food and feed ingredients, in which samples are oxidized with performic acid before protein hydrolysis with 6N HC1. Tryptophan was determined after protein hydrolysis with 4.2N NaOH. In both methods, free amino acids were separated by ionexchange or reverse-phase chromatography. Each laboratory was provided with detailed methods and with sealed vials containing solutions of standards. Samples were analyzed in duplicate, and variation between laboratories was determined. Coefficients of variation between laboratories for the 6 samples ranged from 5.50 to 11.8% for methionine as methionine sulfoxide, 8.59 to 17.3% for cysteine as cysteic acid, and 3.87 to 16.1% for tryptophan. Amino acid recoveries were determined by analysis of β-lactoglobulin and were based on expected levels of each amino acid obtained from amino acid sequence data. The mean recovery of cysteine was 97% with a range of 88-119%. For methionine, mean recovery was 98% (range 89-115%) and for tryptophan, 85% (range 59-102%). Method 43.A08- 43.A13 for food and feed ingredients has been adopted official first action for determination of cysteine and methionine in processed foods. The alkaline hydrolysis method has been adopted official first action for determination of tryptophan in foods and food and feed ingredients

Combined effect of citrulline and lactoserum on amino acid availability in aged rats

Nutrition ◽  
2021 ◽  
Vol 87-88 ◽  
pp. 111196
Author(s):  
Prasanthi Jegatheesan ◽  
Christel Vicente ◽  
Perrine Marquet de Rouge ◽  
Nathalie Neveux ◽  
Radji Ramassamy ◽  
...  
Keyword(s):  
Amino Acid ◽  
Combined Effect ◽  
Aged Rats ◽  
Amino Acid Availability

Synergistic effect of citrulline and lactoserum on amino acid availability

2018 ◽  
Vol 37 ◽  
pp. S163
Author(s):  
P. Jegatheesan ◽  
C. Vicente ◽  
P. Marquet De Rouge ◽  
N. Neveux ◽  
R. Ramassamy ◽  
...  
Keyword(s):  
Amino Acid ◽  
Synergistic Effect ◽  
Amino Acid Availability
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