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Throughout life, neural stem cells proliferate and differentiate in restricted zones of the brain, termed niches, to produce new neurons and glial cells. In these niches, growth factors and extracellular matrix (ECM) molecules determine the fate of neural stem and progenitor cells (NSPC). However, the precise compounds and the mechanisms that regulate growth factors and other signaling molecules in...
The current view is that glial cells play important roles in brain functions. Previous authors have shown that glial cells (primarily astrocytes) are connected by gap junctions and functionally cooperate to form a network and coordinate interactions with neurons (see Chapter 13). On the basis of newly revealed anatomical data (Mercier and Hatton, 2000; 2001, Mercier et al., 2002; 2003) and re-analysis...
Lighting applications are nowadays arriving at a crossing point. Production and selling of incandescent lamps is drastically decreasing. European countries have decided to arrive to complete interdiction in 2012. Compact fluorescent lamps (CFL) have some drawbacks limiting their usefulness, with many problems related to compatibility with dimmers, even for supposed dimmable CFL. We present the design...
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