Nitrogen degradable

Silk deterioration takes place via two main mechanisms oxidation and hydrolysis. Harris (15) has shown that degradation by exposure to light results largely from oxidation and is accompanied by the formation of ammonia nitrogen. Degradation by hydrolysis, on the other hand, is accompanied by the formation of amino nitrogen. In this way, Harris has been able to separate the portions of fiber deterioration that can be attributed to oxidation and hydrolysis. 

Pyrolysis of acid azides results in the loss of nitrogen gas and intramolecular rearrangement of an R radical from carbon to nitrogen. Degradation to the isocyanate is best carried out by warming the azide in a solution of benzene, toluene, or diphenyl ether. Kinetic... 

DAL80 Negative regulator of genes in multiple nitrogen degradation pathways ... 

In the absence of added nitrogen, degradation is more markedly delineated on the basis of polymer composition. In all cases, except for degradation by Cr. laurentii, hydrolysis was reduced. A. fumigatus and Cr. laurentii displayed enhanced activity towards the long polyester chain containing poly(ester-urethanes). 

The values of digestible amino acids in the intestine were calculated using the method proposed by Rulquin et al. (2001a and b). The values indicated in the present tables are not exactly the same as the values published in previous tables since the values of crude protein, amino acids, nitrogen degradability and RUP digestibility (TId) have all been updated. Nine essential amino acids have been taken into account lysine, methionine, leucine, histidine, phenylalanine, threonine, isoleucine, valine and arginine. 

Nitrogen degradability values for silages show great variability, as illustrated in Table 19.10, and the use of tabulated values to characterise individual samples may lead to unacceptable errors in ration formulation. 

Nitrogen degradability values are highly variable, and tabulated values are little more than a rough guide. 

Michalet-Doreau, B. and M.Y. Ould-Bah, 1992. In vitro and in sacco methods for the estimation of dietary nitrogen degradability in the rumen a review. Anim. Feed. Sci. Technol. 40, 57-86. 

Table 2. Nitrogen degradation rates and RUP of the samples with the two different assays. ...

---