scholarly journals Effect of amino acid, pH and mineral salts on glass transition and flow behaviour of soy protein concentrate

2018 ◽  
Vol 53 (6) ◽  
pp. 1425-1433 ◽  
Author(s):  
Rafiq Ahmad ◽  
Tor Andreas Samuelsen ◽  
Anne B. Garvik ◽  
Åge Oterhals
Keyword(s):  
Glass Transition ◽  
Amino Acid ◽  
Soy Protein ◽  
Flow Behaviour ◽  
Soy Protein Concentrate ◽  
Protein Concentrate ◽  
Mineral Salts ◽  
Acid Ph

scholarly journals 160 Effects of dietary amino acid concentration on digestibility of amino acids in soybean meal and soy protein concentrate fed to growing pigs

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 65-66
Author(s):  
Su A Lee ◽  
Hans H Stein
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Soy Protein ◽  
Soybean Meal ◽  
Growing Pigs ◽  
Soy Protein Concentrate ◽  
Protein Concentrate ◽  
Ileal Digestibility ◽  
Dietary Amino Acid ◽  
Quadratic Effects

Abstract Two experiments were conducted to test the hypothesis that standardized ileal digestibility (SID) of AA by growing pigs is not influenced by dietary AA. In Exp. 1, thirty cannulated pigs (BW:31.4 ± 3.9 kg) were allotted to 5 diets. Four diets were formulated to contain 4.7 to 30.4% CP, by including 10, 30, 50, or 70% soybean meal. An N-free diet was used to determine the basal endogenous losses of CP and AA. The model included diet as a fixed variable and polynomial contrasts were used to test linear and quadratic effects of dietary AA. The SID of CP, Lys, Phe, and Thr decreased linearly (P < 0.05) as dietary AA increased (Table 1). However, this effect was primarily a result of the SID of AA in the diet containing 30.4% CP and the SID of CP and most AA was not affected by dietary AA if diets contained 4.7 to 22.1% CP. In Exp. 2, twenty-four cannulated pigs (BW:22.8 ± 1.7 kg) were used. Pigs were allotted to a quadruplicated 6 × 2 Youden square design with 6 diets and 2 periods. Five diets were formulated to contain 6.8 to 31.8% CP, by including 10, 20, 30, 40, or 50% soy protein concentrate. An N-free diet was also used. Data were analyzed as for Exp. 1. The SID of His and Lys decreased quadratically (P < 0.05) with increased dietary AA (Table 2). However, if dietary CP was 26.6% or less, no effect of dietary AA on SID of CP and most indispensable AA was observed. In conclusion, the SID of most AA is not influenced by dietary AA if dietary CP does not exceed around 26%. Hence, the SID of AA in feed ingredients may be determined in diets containing AA below, at, or slightly above requirements without impacting results.

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