Magnetic field effect, inhomogeneous

The inhomogeneity of the micellar aggregate also affords assisted spin trapping and the exploitation of magnetic field effects on the charge separated ion pairs [48]. Optical modulation spectroscopy can be used, for example, to follow the decay of radicals formed in homogeneous solution and in SDS micelles. Enhancements of a factor of about 50 in the lifetimes and the steady state concentrations of the radical were observed in the micelle, and a kinetic analysis led to a value of 2 x 103 s 1 for the exit rate constant from the micelle [49]. 

Diffusion of nuclear spins in an inhomogeneous magnetic field can cause dephasing and contribute additionally to T2, making it shorter. Thus, the echo intensity observed in SE, as well as GE, methods is sensitive to Ti, T, and diffusion effects. MR images sensitive to diffusion effects, i.e., diffusion-weighted images, can be produced by... 

To keep the preparation in a given limited area, one must create a zone of effective action of inhomogeneous magnetic field, under the influence of which the significant portion of (or all) the carriers should remain in the target organ. These circumstances lead to the need for solvation of the following tasks ... 

Let us consider now the effect of an inhomogeneous magnetic field on the particles in a free vessel and evaluate the conditions necessary for delivery of the carriers to the vessel wall in the area of effective action of the magnetic field with a characteristic length / (Figure 10.1). We consider the field level such as for... 

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