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Multiyear Arctic ice is effectively gone
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The Hopkins team, reporting Oct. 29 in Neuron, reveals how palmitate, a fatty acid, marks certain brain proteins — NMDA receptors — that need to be activated for long-term memory and learning to take place. The fatty substance directs the receptors to specific locations in the outer membrane of brain cells, which continually strengthen and weaken their connections with each other, sculpting and resculpting new memory circuits.
Moreover, the researchers report, this fatty modification is a reversible process, with some sort of on-off switch, offering possibilities for manipulating it to enhance or even, perhaps, erase memory. -
The good news is that the American Recovery and Reinvestment Act, a k a the Obama stimulus plan, is working just about the way textbook macroeconomics said it would. But that’s also the bad news — because the same textbook analysis says that the stimulus was far too small given the scale of our economic problems. Unless something changes drastically, we’re looking at many years of high unemployment.
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Clipperz is a free and anonymous online password manager. Local encryption within the browser guarantees that no one except you can read your data. Nothing to install.
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Peter Norvig
Posted by: amygdala | November 4, 2009
links for 2009-11-03
Posted in del.icio.us
Amy G. Dala 
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