Skip to main content
. Author manuscript; available in PMC: 2013 May 31.
Published in final edited form as: J Phys Chem A. 2012 May 18;116(21):5129–5138. doi: 10.1021/jp302399f

Figure 8.

Figure 8

a) Representative polarization buildup curves of 1.4 M [1-13C]pyruvate samples doped 40 mM 4-oxo-TEMPO and mixed with different concentrations of Gd3+ at 3.35 T and 1.4 K. The buildup was monitored by irradiating the samples at 94.07 GHz with a 100 mW microwave source. b) the maximum 13C nuclear polarization of [1-13C]pyruvate sample as a function of Gd3+ concentration derived from Figure 8a. c) Polarization buildup time constant vs. Gd3+ concentration derived by fitting the polarization buildup curves with a single-exponential buildup equation.