منابع مشابه
Beating under pressure
Raf-1 regulates migration af-1 signaling is known to be important for proliferation, differentiation, and survival. Now, Ehrenreiter et al. report that it is required for cell migration and wound healing (page 955). Unlike other Raf-1 functions, this one doesn’t require Raf-1 kinase activity, a theme the researchers think will be recurrent in future Raf-1 biology. When Raf-1 is knocked out in t...
متن کاملUnder pressure
The movement of water by osmosis causes pressure differences that drive the transport of sugars over long distances in plants.
متن کاملUnder pressure.
Abstract A variety of public campaigns, including the “Just Say No” campaign of the 1980s and 1990s that encouraged teenagers to “Just Say No to Drugs”, are based on the premise that teenagers are very susceptible to peer influences. Despite this, very little is known about the effect of school peers on the long-run outcomes of teenagers. This is primarily due to two factors: the absence of inf...
متن کاملHyperactivation is the mode conversion from constant-curvature beating to constant-frequency beating under a constant rate of microtubule sliding.
Flagellar beating of hyperactivated golden hamster spermatozoa was analyzed in detail using digital image analysis and was compared to that of nonhyperactivated (activated) spermatozoa in order to understand the change in flagellar beating during hyperactivation and the active microtubule sliding that brought about the change in flagellar beating. Hyperactivated flagellar beating, which was cha...
متن کاملHotelling Under Pressure
We show that crude oil production from existing wells in Texas does not respond to current or expected future oil prices, contradicting a basic prediction of Hotelling’s (1931) canonical model of exhaustible resource extraction. In contrast, the drilling of new wells exhibits a strong price response, as does the rental rate on drilling rigs. To explain these observations, we reformulate Hotelli...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 2005
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb1686iti3