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. Author manuscript; available in PMC: 2009 Aug 7.
Published in final edited form as: J Magn Reson. 2008 Apr 29;193(1):127–132. doi: 10.1016/j.jmr.2008.04.034

Fig. 4.

Fig. 4

Fourier transform (FT) analysis of EPR and pressure-sensor data. The data were obtained from crystals of LiNc (A and B) or DPPH (C and D) subjected to 150-Hz pressure modulation. The EPR data of LiNc (A) show a peak at 150 Hz while that of DPPH does not show any peak (C) due its oxygen-insensitivity. The pressure-sensor data, however, show distinct peaks at 150 Hz. The ‘‘*” in (A) indicates a 60-Hz frequency originating from the signal channel at high receiver gains.