They were then able to give the mice higher doses of radiation therapy with no ill effect by blocking a mechanism by which endothelial cells communicate with each other.

BBC: Minimising cancer care damage

You won't find many outside the movie business who believe that blocking Newzbin 2 will have a major effect on piracy.

BBC: Newzbin: What happens next?

But if the toxic effects were caused directly by the intended effect of the drug (blocking gamma secretase), that would raise serious questions as to whether it is safe to continue with other trials of gamma secretase drugs now ongoing at other drug companies including Bristol-Myers Squibb.

FORBES: The Man Who Predicted Eli Lilly's Alzheimer Failure

Fabrizio Sanna and colleagues at the University of Cagliari in Italy injected oxytocin into particular parts of the brains of rats and induced yawning, or blocked the effect by injecting an oxytocin-blocking chemical first.

WSJ: Matt Ridley on Why You Just Yawned | Mind & Matter

Data seen by the BBC suggested that the blocking of The Pirate Bay had only had a short-term effect on the level of pirate activity online - with levels of peer-to-peer sharing returning to normal soon after.

BBC: Court orders UK ISPs to block more piracy sites

In accordance with this provision, I have sent to the Federal Register for publication the enclosed notice stating that the national emergency and related measures blocking the property of certain persons undermining democratic processes or institutions in Belarus are to continue in effect beyond June 16, 2011.

WHITEHOUSE: The White House

Most of it is, of course, radiated back into space. (It is the partial blocking of this radiation by gases such as carbon dioxide that causes the much-talked-of greenhouse effect.) Some of it, however, goes in the opposite direction, into the ground.

ECONOMIST: The hole story of global warming