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. Author manuscript; available in PMC: 2014 Sep 17.
Published in final edited form as: Acc Chem Res. 2013 Apr 18;46(9):1933–1941. doi: 10.1021/ar300348n

Figure 5.

Figure 5

13C CP DNP enhancements of U-[13C ,15N] urea with 10 mM TOTAPOL plotted as a function of μw power at 80 K (left) and as a function of temperature at 12.5 W μw (right). ωr/2π= 7 kHz.