By Aravinda Anantharaman
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This can be a replica of a booklet released prior to 1923. This publication can have occasional imperfections comparable to lacking or blurred pages, terrible photographs, errant marks, and so on. that have been both a part of the unique artifact, or have been brought by means of the scanning procedure. We think this paintings is culturally vital, and regardless of the imperfections, have elected to convey it again into print as a part of our carrying on with dedication to the renovation of published works all over the world.
How do NGOs conquer the suspicion of them as “Western” brokers? How do they persuade people who opposite to universal perceptions, they don't “lead ladies off course from Islam”? and the way, within the context of poverty, non secular fundamentalism, and ethnic clash, do NGOs persuade people who women’s concerns benefit any recognition in any respect?
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The antibody was labeled with a substance with red ﬂuorescence. B: One of the astrocytes in A has been ﬁlled completely with intracellular injection of a substance with green ﬂuorescence (Lucifer yellow), and reconstructed three-dimensionally. It is obvious that the astrocytic processes are much more abundant and of ﬁner caliber than in A. C: View of the injected astrocyte in B in isolation, showing to advantage its dense and bushy halo of processes. (Reproduced with permission from Wilhelmsson et al.
The role of microglia illustrates the complexity: they may contribute both to destruction of myelin and axons and to regenerative processes (such as remyelination), presumably depending on the local situation. Unmyelinated Axons As mentioned, unmyelinated axons conduct much more slowly (at less than 1 m/sec) than myelinated ones, because they are thinner and lack the extra insulation provided by the myelin sheath. In the CNS, unmyelinated axons often lie in closely packed bundles without any glial cells separating them (see Fig.
This is not merely a passive movement of charged particles in the fluid inside the axon. Because axons are poor conductors (compared with a metal thread), the action potential has to be renewed along the axonal membrane by cycles of depolarization and repolarization. In unmyelinated axons, these cycles move along the axon as a continuous wave, while in myelinated axons renewal of the action potential occurs only at the nodes of Ranvier. Because the process of depolarization–repolarization takes some time, the speed of conduction is very much slower in unmyelinated axons than in myelinated ones.