FIGURE 2.
31P (a) and 1H (b) NMR spectra of partially oriented samples of DMPC:gD as a function of temperature. All samples are oriented with the glass plate normal at the magic angle with respect to the main magnetic field. The temperature for the rightmost spectrum in each panel is 30°C and it is decreased by 1°C for each spectrum to the left. The observed 31P spectra are superpositions of the powder pattern lineshape and the sharp signal from the macroscopically oriented part of the sample. Spectra are deliberately taken from samples that contain a high degree of unoriented sample to be able to observe changes in the signal from both the oriented and unoriented parts. The same features were observed also in samples with a high degree of orientation.