Practical Features of the technique 99COC147): Gradients in MAS ( 99JMR29-141) Shimming a HR-MAS probe ( 05JMR84-173) Solvent suppression in HR-MAS Using known schemes such as CHESS or WET, or variants of them, for instance the SEEN scheme ( 04JMR142-171) Using differential diffusion behavior of the solvent resonances and ther attached molecules ( 99JACS3787)