We further demonstrate that our previously reported image processing technique for measuring migration in 2D (Topman et al., 2011, 2012) is extendable for analyzing the rates of migration of cells that directionally migrate in the hydrogel and are fluorescently stained with a 4′,6-diamidino-2-phenylindole (DAPI) nuclear stain.
In addition to high rates of migration out of the regions altogether, residents also migrated within the regions from rural areas to the few main cities, resulting in a more urban population.
Surface diffusion of active species is a general phenomenon in catalysis: rates of migration often being much higher than turnover frequencies of reaction, surface species can migrate and visit a great number of active sites in between two successive catalytic cycles.
Molecules of intermediate sizes show different rates of migration, depending on their size.
And unforgivably, while we had the highest rates of migration in our modern history, we also had well over five million people of working age on out-of-work benefits".
At current rates of migration, the United Nations Human Settlements Program has projected that one-quarter of the earth's population will live in so-called slums by the year 2020.
In an electric field, such molecules adopt different rates of migration toward positively (anode) or negatively (cathode) charged poles and permit separation.
Although the Great Migration slowed during the Great Depression, it surged again after World War II, when rates of migration were high for several decades.
The rates of migration of substances in chromatographic procedures depend on the relative affinity of the substances for the stationary and the mobile phases.
Rates of migration soared in recent decades as the likes of Britain and America enjoyed rapid economic growth and sucked in labour.
Paper chromatography, in analytical chemistry, technique for separating dissolved chemical substances by taking advantage of their different rates of migration across sheets of paper.
