Migration

migration-inhibitory factor (Science: growth factor) A soluble, nondialysable factor that is produced by sensitised lymphocytes following exposure to a specific antigen. It inhibits macrophage migration and causes adherence.

Migration The migration of different cell types, such as leucocytes and tumour cells, involves cellular strategies to overcome the physical resistance of three-dimensional tissue networks, ... Full article ...

Through these proteolytic events, MT1-MMP regulates various cellular functions, including ECM turnover, promotion of cell migration and invasion, and morphogenic responses to extracellular stimuli.

Migration Movement of individuals between otherwise reproductively isolated populations.

Migration Migration is often an important density-dependent factor in reducing populations. As the population increases, many of its members emigrate. Predation ...

Migration into or out of a population can breakdown genetic differences between populations. Mutations developing in one population may be spread to other populations by migration. This serves, like mutation, to introduce new alleles into populations.

Migration into or out of a population can change allele frequencies. Immigration may add new genetic material to the established gene pool of a population. Conversely, emigration may remove genetic material.

migration A seasonal movement from one location to another. Milankovitch cycles Periodic variations in tilt, eccentricity, and wobble in the earth's orbit; Milutin Milankovitch suggested that it is responsible for cyclic weather changes.

Emigration. The departure of individuals from a given area Endosymbiotic. Being symbiotic and living within the body of an individual of the associated species ...

Emigration moving out of a location (e- = out; migrare = to move‚ depart)    Empedocles person who lived around 490 to 444 BC and thought there were four original elements: Earth‚ Air‚ Fire‚ and Water ...

the migration of individual cells from surface layers into the interior of the embryo. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...

Human Migration Hypotheses Most scientists agree that an early hominid species evolved in Africa and spread across the Old World.

Branch migration A "zipper-like" pairing of two homologous DNA strands during genetic recombination.

Branch Migration: It descibes the ability of a DNA strand partially paired with its complement in a duplex to extend its pairing by displacing the resident strand with which it is homologous. << Previous ...

In 1924, the Immigration Restriction Act was passed, with eugenicists for the first time playing a central role in the Congressional debate, as expert advisers on the threat of "inferior stock" from Eastern and Southern Europe.

ingression - the migration of individual cells from surface layers into the interior of the embryo. intercalate - to insert or interpose ...

Since OPM queries are ultimately translated to one or more relational SQL queries by the OPM tools anyway, we can perform this translation at an earlier stage of the query process, producing SQL to which CPL can apply its maximal subquery migration ...

Law -- the concept that both gene frequencies and genotype frequencies will remain constant from generation to generation in an infinitely large, interbreeding population in which mating is at random and there is no selection, migration or mutation.

Founder effect is a phenomenon in the work that we do that refers to the migration of a small group of people from a larger population to go settle in another environment.

Differentiation between subpopulations, followed by migration among them, could contribute to adaptations amongst populations. Wright also came up with the idea of the adaptive landscape -- an idea that remains influential to this day.

These form by cell divisions, migrations, and rearrangements and are the forerunners of specialized tissues and organs. The ectoderm is the outermost primary tissue layer that forms first in all animal embryos.

electrophoresis A technique that separates charged molecules - such as DNA, RNA or protein - on the basis of relative migration in an appropriate matrix (such as agarose gel or polyacrylamide gel) subjected to an electric field.

volvo - to roll]. A process of cellular migration involving movement of a sheet of cells over an edge and then spreading inwards in the opposite direction. This occurs, for example, during amphibian gastrulation.

Bering Land Bridge -- n. The vast tundra plain that was exposed between Asia and North America during the Last Glacial Maximum, about 21,000 years ago; it served as a migration route for people, animals, and plants. Also known as Beringia.

Pulsed-field gel electrophoresis (pfge) - separation of large (>50 kb) pieces of DNA, including complete chromosomes and genomes, by rapidly alternating the direction of electrophoretic migration in agarose gels.

branch migration See Holliday intermediate. buffer A system capable of resisting changes in pH when small amounts of acid or base are added. Consists of a conjugate acid-base pair in which the ratio of proton acceptor to proton donor is near unity.

See also: Trans, Human, Organ, Population, Origin