Attempts to observe spin diffusion directly

PS/PVME blends chemical shift H chemical shift 97 

A much more general consideration is the question of whether there are any processes other than spin diffusion that can affect the detected signal. An almost universal problem in this regard is Tj relaxation during the evolution period, which can change not only the total amount of magnetisation detected, but also the relative populations of the regions in a manner similar to spin diffusion effects. 

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