In one form of this technique, distortionless enhancement by polarization transfer is an alternative to the APT. The (10[1])Karplus equation relates dihedral angles to the coupling constant measured in this technique. (10[1])Most forms of this technique use a Fourier transform to analyze the free induction decay that occurs as a result of relaxation. TMS is used as a standard in several forms of this technique, which (-5[1])normalizes frequencies of peaks to chemical shift. (10[1])This technique’s (10[1])most common forms use hydrogen-1 and (10[1])carbon-13 (10[1])since they have a non-zero spin. For 10 points, name this technique where chemical structures are determined by a strong magnetic field (10[1])applied to nuclei. ■END■ (0[2])