Figure 3
From: Proton-Detected Solid-State NMR Spectroscopy of Bone with Ultrafast Magic Angle Spinning

Average 1H spin-spin relaxation time (T2) of powdered cortical bone as a function of MAS frequency.
The 1H T2 values were determined by 1H-detected spin-echo NMR experiments with an incremented echo delay at 14.1 T. The reported errors were estimated from the best-fitting of experimental data.