Mobility and migration

Cochet (C3), in measurements with particles in the size range of 0.1-1 micron, found a minimum mobility and migration velocity at a particle diameter of micron. The following are some of his results for the minimum velocity... 

Metal deposition and dissolution (34) In the electrodeposition of solid metals such as silver and zinc, the cation is transported across the electrochemical interface to sites on the electrode surface (Figure 6-4). The positive charge of the cation is offset by electrons from the metal, and the adsorbed species becomes an adatom. These species have surface mobility and migrate along the electrode surface to an imperfection such as a step dislocation, where they enter into the crystal lattice. In the absence of sufficient step dislocations to accommodate the rate of deposition, the adatom surface concentration increases until two- or three-dimensional nucleation occurs. The rate of such nucleation and surface migration strongly influences the morphology of the electrocrystalhzation process. The reverse of this process is involved with electrodissolution of crystalline electro-deposits. 

Transinhibition of chemokine-induced Ca mobilization and migration Delayed HIV progression... 

Conductimetry (the measurement of conductivity) is a physical chemical measurement that provides information about the total ionic content of aqueous solutions. Using conductimetric techniques, electrolytic properties of ions such as diffusion, transport, mobility, and migration have been extensively studied and reported. Dissociation and dielectric constants of compounds have similarly been the subject of these physical chemistry studies in both aqueous and nonaqueous solutions. 

This mechanism is extrinsic to any crystal lattice. The phenomenon arises due to charges that exist from contaminants or irregular geometry of the interfaces of polycrystalline ceramics and is therefore an extraneous contribution. These charges are partially mobile and migrate under an applied field. 

Continuous cell proliferation then results in tumor formation. In addition, tumor growth beyond a millimeter size is dependent on tumor blood vessel formation, and changes resulting in enhanced cell mobility and migration allow tumor cells to metastasize to distant body sites (72). 

Mobility and Migration Towards Develqiment-Centred Durable Solutions ... 

Gnisci, D. (2008) West African Mobility and Migration Policies of OECD Countries. Issy-les-Moulineaux West African Studies/OECD. 

Favoured by the increased temperature the alkali-ions in the glass, especially Na in Pyrex-glass, become mobile and migrate under the action of the applied electrical field to the cathode (see Fig. 10.7), which eventually results in the formation of a depletion layer with high electric field strength in the contact area between the glass sheet and the silicon wafer. The resulting... 

The mobility and migration of boundaries, in Recrystallization and Related Annealing Phenomena (Second Edition), F. J. Humphreys and M. Hatherly, Elsevier, New York, 2004,121. 

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