Amino acids digestibility

RAVINDRAN V, CABAHUG s, RAVINDRAN G, BRYDEN w L (1999) Inflnence of microhial ph)dase on apparent ileal amino acid digestibility of feedstuff s for hroUers. Poult Sci. 78 699-706. 

Darragh, A. J., and Moughan, P. J. (1998). The amino acid composition of human milk corrected for amino acid digestibility. Br. J. Nutr. 80,25-34. 

AM Rowan, PJ Moughan, MN Wilson. Effect of hydrolysis time on the determination of the amino acid composition of diet, ileal digesta, and feces samples and on the determination of dietary amino acid digestibility coefficients. J Agric Food Chem 40 981-985, 1992. 

Z. Yi, E. T. Kornegay, and D. M. Denbow, Effect of microbial phytase on nitrogen and amino acid digestibility and nitrogen retention of turkey poults fed corn-soybean meal diets, Poultry Sc. 1996d, 75, 979-990. 

Amino acid Digestibility in canola meal (%) Digestibility in soybean meal (%)... 

Batal, A.B. and Dale, N.M. (2006) True metabolizable energy and amino acid digestibility of distillers dried grains with solubles. Journal of Applied Poultry Research 15,89-93. 

Im, H.L., Ravindran, V., Ravindran, G., Pittolo, P.H. and Bryden, W.L. (1999) The apparent metabolisable energy and amino acid digestibility of wheat, triticale and wheat middlings for broiler chickens as affected by exogenous xylanase supplementation. Journal of the Science of Food and Agriculture 79,1727-1732. 

Mitaru, B.N., Reichert, R.D. and Blair, R. (1985) Protein and amino acid digestibilities for chickens of reconstituted and boiled sorghum grains varying in tannin contents. Poultry Science 64, 101-106. 

Opapeju, F.O., Golian, A., Nyachoti, C.M. and Campbell, L.D. (2006) Amino acid digestibility in dry extruded-expelled soyabean meal fed to pigs and poultry. Journal of Animal Science 84,1130-1137. 

The expelled CSB meal had a TMEj, value of 3265 kcal/kg DM. They also reported that amino acid digestibility of CSB extruded at 138°C or 154°C did not differ from that of extmded KFSB. Expelling of CSB had no significant effect on amino acid digestibility values when compared with extruding alone. 

Mosenthin, R., Sauer, W.C. and Ahrens, F. 1994. Dietary pectin s effect on ileal and fecal amino acid digestibility and exocrin pancreatic secretions in growing pigs, J. Nutr., 124 (8) 1222-1229. 

Mitaru, B.N. R. Blair R.D. Reichert W.E. Roe. Dark and yellow rapeseed hulls, soybean hulls and a purified fiber source their effects on dry matter, energy, protein and amino acid digestibilities in cannulated pigs./. Sci. 1984,59, 1510-1518. 

Smiricky, M.R. C.M. Grieshop D.M. Albin J.E. Wubben V.M. Gabert G.C. Fahey, Jr. The influence of soy oligosaccharides on apparent and true ileal amino acid digestibilities and fecal consistency in growing pigs./. Anim. Sci. 2002, 80, 2433-2441. 

Proteins are not alike. They vary according to their origin (animal, vegetable), amino acid composition (particularly their relative content of essential amino acids), digestibility, texture, etc. Good quality proteins are those that are readily digestible and contain the essential amino acids in quantities that correspond to human requirements. 

The data for amino acid digestibility in the pig are taken from AFZ, Ajinomoto Eurolysine, Aventis Animal Nutrition, INRA, ITCF, 2000. AmiPig. Standardised Ileal Digestibilit/ of amino acids in feedstuffs for pigs, AFZ, Paris. (Document available at www.feedbase.com/amipig)... 

Animal feeding is experiencing tremendous changes. Its initial objective - to meet nutritional requirements - is now only one of many challenges we must understand and control its impact on product quality and safety, on animal welfare and health, and on the environment These wider objectives require the development of new concepts of nutritional value of feedstuffs,for which these tables are a useful basis. The new feed characteristics provided therein (amino acid digestibility, availability or digestibility of minerals, cation-anion difference) are definitely within this framework. 

Over the last few years, INRA has performed many measurements of true amino acid digestibility using intact adult cockerels (Zuprizal et al., 1990). As the birds were force-fed with the amount of diet required to cover protein requirements, the proportion of endogenous losses in the excreta was very low the endogenous losses were estimated using fasted animals. The tables present these values as well as those obtained using the same system and similar methods. 

Our aim in producing these tables was to provide reliable data, rather than to change the fundamental concepts of rabbit feeding. Therefore, we had to select the most relevant nutritional criteria and discard parameters such as ileal amino acid digestibility or phosphorus availability, which, though interesting, have not yet proven to be suitable in rabbit feeding due the lack of experimental data. 

Amino acid digestible in the intestine (ruminants), in % PDIE Acid Detergent Fibre, in %... 

Mosenthin, R., Sauer, W.C., Ahrens, F., de Lange, C.F.M. and Bomholdt, U. (1992) Effect of dietary supplements of propionic acid, siliceous earth or a combination of these on the energy, protein and amino acid digestibilities and concentrations of microbial metabolites in the digestive tract of growing pigs. Animal Feed Science and Technology 37 245-255. 

Adapted from Sauer W C and de Lange K 1992 Novel methods for determining protein and amino acid digestibility values in feedstuffs. In Nissen S (ed.) Modern Methods in Protein Nutrition and Metaboiism, London, Academic Press. 

Table II shows the effect of alkali treatment on some other amino acid digestibility. The hydrolytic release rate for individual amino acids was different from the mean rate of release for protein nitrogen and varied according to the protein. For example, lysine from rapeseed protein was liberated slowly. Lysine was more available from soybean protein and its release rate was equivalent to that of serine. The latter amino acid is equally available from both protein sources.

T. van Kempen. NIR technology can we measure amino acid digestibility and energy values 12th Annual Carolina Swine Nutrition Conference. November 13th, 1996. 

Amino acids Digesting proteins in hydrochloric acid Bayonet heaters, condaisers ... 

The breakdown of proteins or peptides into smaller units— polypeptides tripeptides, dipeptides and amino acids. Digestion of proteins entails proteolysis. 

Rostagno, H.S., Rogler, J.C., and Featherston, W.R. 1973. Studies on the nutritional value of sorghum grain with varying tannin contents for chicks. Amino acid digestibility studies. Poultry Sci. 52 772. 

Donkoh A., P. J. Moughan and W.C. Smidi, 1994. Comparison of die slaughter mediod and simple T-piece cannulation of die terminal ileum for determining ileal amino acid digestibility in meat and bone meal for the growing pig. Anim. Feed Sci. Technol. 49, 43-56. 

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