Effects and Tracer Studies

Various deuterium isotope effects on d have been reported, including 

As described in other sections, N is important as a biological tracer in view of the central part played by nitrogen in many vital processes, including hydrogen bonding, and the absence of a useful radioisotope, since N has a half-life of 10 min. 

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Deuterium isotope effect and tracer study of the mechanism of decomposition of the cationic ruthenium complexes... 

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