NAG

The recent evidence of workmanship-related defects to major structures in extreme environments leaves a nagging doubt about weather the real issues behind the problems have really been understood, acknowledged and dealt with at all levels. 

Everyone in the maintenance department should be encouraged to contribute ideas on a better way to do a task or a solution to a nagging problem related to the maintenance or operation of production equipment. Each contributor should be given credit by name and location for his or her effort. Very few workers can resist a bit of pride in seeing their names attached to an article that is seen by virtually everyone in the company. 

The authors wish to recognize financial support under grants NAG 3-154 and NAG 3-95 from the NASA Lewis Research Center, Cleveland, Ohio. 

RTLn(V r(T)) - -nAG°(Methylene Group) -niAG (Methyl Group)... 

The ordinary differential equations for f and C now form a fifth-order system which can be solved using a standard NAG library routine. The results are shown in Fig. 10.73. This figure also shows the numerical results for concentration obtained using a full numerical approach, and there is reasonable agreement between the two. 

Rciufion.—Dissolve a little of the substance in alcohol and add a drop or two of an alcoholic solution of silver nitrate. A red crystalline precipitate of CqHjNiN.NAg.CjjH is deposited. See Appendix., p. 285. 

FIGURE 16.33 (NAG)3, a substrate analog, forms stable complexes with lysozyme. 

Note that the numbering of the new system is not the same as for the gene symbols. A closely related sodium channel-like proteins have been identified and named Nax. Functional properties of these proteins are not known, except for the NaG protein, which functions as a sodium sensor of body fluid. 

Chemistry of tetra- and penta-valent chromium. K. Nag and S. N. Bose, Struct. Bonding (Berlin), 1985,63,153 (278). 

Hen egg-white lysozyme catalyzes the hydrolysis of various oligosaccharides, especially those of bacterial cell walls. The elucidation of the X-ray structure of this enzyme by David Phillips and co-workers (Ref. 1) provided the first glimpse of the structure of an enzyme-active site. The determination of the structure of this enzyme with trisaccharide competitive inhibitors and biochemical studies led to a detailed model for lysozyme and its hexa N-acetyl glucoseamine (hexa-NAG) substrate (Fig. 6.1). These studies identified the C-O bond between the D and E residues of the substrate as the bond which is being specifically cleaved by the enzyme and located the residues Glu 37 and Asp 52 as the major catalytic residues. The initial structural studies led to various proposals of how catalysis might take place. Here we consider these proposals and show how to examine their validity by computer modeling approaches. 

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