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. Author manuscript; available in PMC: 2017 Sep 1.
Published in final edited form as: Magn Reson Med. 2015 Oct 7;76(3):1007–1014. doi: 10.1002/mrm.26002

Figure 7.

Figure 7

(A) Temperatures of ethanol/ethanol ice (dashed line) and toluene/toluene ice (solid line) baths measured during controlled annealing. The temperatures were stabilized to be within ±2 K of the target annealing temperatures. (B) Comparison of 15N2O spectra after ~20 hours of DNP and (C) polarization build-up after short (annealing 1) and after long (annealing 2) controlled annealing at ~154 K and ~180 K, respectively. Note the significant increase in the signal intensity after the longer annealing.