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. 2019 Jan 22;9(2):19. doi: 10.3390/metabo9020019

Figure 1.

Figure 1

Representation of an HR-MAS NMR probe head with an orientation of the stator at an angle (θ) of 54.7° between axis of rotation and B0. The rotation speed (vrot) of the sample reaches up to 15 kHz. A gradient coil is arranged around the rotor.