[Nutritional physiology studies in pigs on the evaluation of modified proteins. 1. Results of the estimation of N-turnover, apparent and true digestibility of proteins in addition to apparent and true absorption of amino acids in the entire digestive tract].
Sulfuric acid-casein (A), spray dried isolated Vicia faba protein (B), Vicia faba protein/casein (1 : 1) protein fibres-untreated (C), treated with dialdehyde starch (D) or aluminum chloride (E) and meal of Vicia faba (F) were studied as sole protein sources in semisynthetic feed mixtures on 13 female pigs (40 to 45 kg body weight). Total utilization of nitrogen (b-value, PNu) and intermediate utilization (BW) were highest in A, followed by C. Protein C was superior to D. Protein E showed a drastic drop in protein quality compared with D because of a high decrease in S-containing amino acids content, however, their efficiency (bc-1-value) was not limited. Despite of a higher apparent digestibility by approximately 17 units in protein B, proteins B and F showed a similar quality. The true absorption of cystine (estimated by the balance of digestive tract) was corresponding to the protein quality of the respective step of treatment of protein C and was used for the correction of the gross content is S-containing amino acids.
D000596:Amino Acids / Q000378:metabolism*; D000818:Animals; D004044:Dietary Proteins; D004063:Digestion; D004064:Digestive System / Q000378:metabolism; D005260:Female; D005511:Food Handling; D007408:Intestinal Absorption; D009584:Nitrogen / Q000378:metabolism; D013552:Swine / Q000502:physiology*
D000596:Amino Acids; D004044:Dietary Proteins; D009584:Nitrogen
Ernährungsphysiologische Untersuchungen an Schweinen zur Beurteilung von modifizierten Proteinen. 1. Mitteilung. Ergebnisse der N-Umsatzmessung, scheinbare und wahre Proteinverdaulichkeit sowie scheinbare und wahre Aminosäureresorption bis zum Ende des Verdauungstraktes.