Signal type restriction

It should be pointed out here that the aforementioned argument about the two types of a-helice, the a, and an forms, based on their conformation-dependent displacement of l3C NMR signals, is restricted to an assumed static picture of these forms. However, a view of the dynamic equilibrium is implicitly taken into account for the interpretation of the l3C chemical shifts of the loop and random coil forms. It seems, therefore, to be more realistic to discuss the conformation and dynamics of more flexible membrane proteins in terms of the new concept of the dynamics-dependent displacement of 13C NMR peaks, to be discussed in Section 6.1. 

Multiple receive systems with multi-coil arrays have become widely distributed in medical MRI. The benefit is the enhancement of the signal-to-noise ratio per time or a reduction of the acquisition time. This technique is not used in NMR microscopy for objects of intermediate size in standard bore (52-mm id) and wide bore (89-mm id) magnets, which are the most widely distributed magnet types for NMR microscopy. The main reason is the restricted space in such magnets for the shim... 

Therefore the forementioned diaza-systems of type 77 show pH-dependent redox behaviour which, however, is restricted to Ej(RED/SEM). Its pH-dependence amounts to 58-60mV/pH-unit, signalizing the equilibrium 77red H <= 77red H . For the same reason Ig Ksem s simultaneously diminished by one unit if pH is lowered by one unit. Figure 12 demonstrates this pH-dependence for the already discussed systems 33, 35, 72 and 73. 

---