Off-magic-angle spinning

Asakura, T., Ashida, J., Yamane, T., Kameda, T., Nakazawa, Y., Ohgo, K., and Komatsu, K. (2001). A repeated beta-turn structure in poly(Ala-Gly) as a model for silk I of Bombyx mod silk fibroin studied with two-dimensional spin-diffusion NMR under off magic angle spinning and rotational echo double resonance. / Mol. Biol. 306, 291-305. 

NMR. NMR analyses were performed on selected samples using dipolar dephasing and off magic angle spinning methods developed at the University of Utah (18-22). This work was performed at the University of Utah under the direction of Professor Ronald Pugmire. The technique allows quantitative analysis of functional groups in the solid coals and chars. 

Magic angle spinning and off-magic angle spinning... 

G. Pileio, Y. Guo, T.N. Pham, .M. Griffin, M.H. Levitt, S.P. Brown, Residual dipolar couphngs by off-magic-angle spinning in solid-state nuclear magnetic resonance spectroscopy, . Am. Chem. Soc. 129 (2007) 10972—10973. 

Rapid off-magic-angle spinning (OMAS) yields a scaled powder pattern that can be analyzed to determine the individual chemical-shielding tensors. The isotropic chemical shift must be known, and can be determined separately. The relation can calculate the tensor components from the OMAS-scaled components ... 

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