Die Wirkung von Aminosäurenergänzung auf den biologischen Eiweißwert von Hafer

Walz, O. P.

doi:10.1080/17450397309430878

Archiv für Tierernaehrung

1973

DOI: 10.1080/17450397309430878

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Die Wirkung von Aminosäurenergänzung auf den biologischen Eiweißwert von Hafer

O. P. Walz

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1979

1989

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Cited by 13 publications

References 5 publications

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Utilisation of free and protein dietary lysine in chicks estimated with isotopes

Otto

Šnejdárková²,

Simon³

1989

British Poultry Science

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1. Utilisation of supplementary free L-lysine hydrochloride was estimated in growing chicks and compared to that of protein-bound lysine. The technique used is based on the oxidative catabolism of either free (U-14C)-L-lysine or the labelled lysine incorporated into yeast proteins. 2. The animals received a wheat-wheat gluten diet which was L-lysine-supplemented with either unlabelled yeast proteins or a mixture of synthetic amino acids simulating the yeast proteins or L-lysine hydrochloride alone. 3. At 13 and 15 days after hatching, expiry of (14C)--carbon dioxide was followed 8 h after dosing with the appropriate radiolabelled diet. After 4 h, 0.66% of the protein-bound and 5.3 to 5.7% of the free lysine radioactivity appeared as 14C--carbon dioxide. 4. It is concluded that under these conditions lysine from both sources was utilised more efficiently than had been assumed hitherto, protein-bound lysine being slightly better utilised than free lysine.

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Utilisation of free and protein dietary lysine in chicks estimated with isotopes

Otto

Šnejdárková²,

Simon³

1989

British Poultry Science

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N-Bilanzuntersuchungen zur Verwertung von DL-Threonin und DL-Tryptophan am Broilerküken

Liebert

Gebhardt²

1979

Archiv für Tierernaehrung

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It was the purpose of these investigations, apart from a methodical test of the procedure for the ascertainment of the efficiency of optical isomers of synthetic amino acids in an N-balance test, to draw conclusions concerning the value of DL-threonine and DL-Tryptophane for young chickens. The ascertained efficiency of 67% for DL-threonine (D-form 34%) resp. 86% for DL-tryptophane (D-form 72%) coincides with the results described in literature and speaks in favour of the method applied on the basis of the parameters of the efficiency graph of the limiting amino acids. The supposition made here that for a zero content of limiting amino acids the b-value also equals zero, requires further investigation. The clarification of the reasons for the low effectivity of the synthetic L-form ascertained in comparison with the native amino acid also makes further investigation necessary.

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The Rate of Absorption of Synthetic Lysine and Dietary Protein in the Upper Half of the Small Intestine of Pigs

Buraczewska

Lachowicz

Buraczewski

1980

Archiv für Tierernaehrung

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The aim of the present work was to estimate the rate of lysine absorption in the upper part of the small intestine as related to the absorption of total nitrogen and other amino acids in pigs given feed (barley + sesame meal) supplemented with lysine and fed once or 4 times daily. The experiments were carried out on 6 pigs fitted with reentrant cannulas sited in 3 of them about 4 m and in an other 3 about 9 m distal to the pylorus (mean intestine length was about 18 m). The frequency of feeding influenced the rate of flow of total nitrogen and lysine through the intestine. The content of lysine in the digesta (g/16 g N) during the first 5 hours after morning feeding, and particularly between 8.00-10.00 h, was much higher with once daily than with four times daily feeding while during the subsequent 15 hours the reverse was true. The absorption of lysine occurred at a faster rate than that of the other amino acids and was closest to that of arginine and methionine. On the whole, the net absorption rate of essential amino acids in the upper part of the intestine of pigs was as follows: Lys, Met greater than His, Phe, Leu greater than Trp, Ile, Val greater than Thr (Cys). It seems that the more uniform passage through and absorption from the alimentary tract of synethetic lysine and dietary protein, observed at frequent feeding could contribute to their better utilization for protein synthesis in the organism.

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Die Wirkung von Aminosäurenergänzung auf den biologischen Eiweißwert von Hafer

Cited by 13 publications

References 5 publications

Utilisation of free and protein dietary lysine in chicks estimated with isotopes

Utilisation of free and protein dietary lysine in chicks estimated with isotopes

N-Bilanzuntersuchungen zur Verwertung von DL-Threonin und DL-Tryptophan am Broilerküken

The Rate of Absorption of Synthetic Lysine and Dietary Protein in the Upper Half of the Small Intestine of Pigs

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