Other governments, including the Bush administration, have not cooperated with his call to isolate Mr. Arafat, and Mr. Arafat's popularity among Palestinians has only grown during the siege, top Israeli officials acknowledged.
Litster began sending out messengers across the county in a call to arms on 14 June, and isolated outbreaks of violence occurred.
Most of the strikes were at buildings and vehicles symbolizing Yasir Arafat's authority, in what officials called an effort to isolate and intimidate the Palestinian leader while the Israeli government was rallying international backing to persuade him to crack down on militants.
On July 2, Hillary Clinton sent a letter to Haim Saban, a major Clinton donor and fundraiser, expressing her "alarm" over the "Boycott, Divestment, and Sanction movement," which she called "a global effort to isolate the state of Israel by ending commercial and academic exchanges".
In appearances before European Union leaders, Obama called for a sustained effort to isolate Russia to discourage further encroachment on its neighbors, but emphasized that Russia is not the West's top geopolitical challenge.
Germany has led the push to get Russia to engage diplomatically, resisting calls from Washington to isolate the Kremlin.
It draws heavily on intelligence -- what Gen. David Petraeus calls "bandwidth" -- to isolate and eliminate any insurgents, and attempts to establish trust with the locals.
And a third calls for installing gates to isolate one of the northernmost channels of the San Joaquin River, setting aside a permanent habitat for fish.
Here, Chiu et al. used a technique called flow cytometry using different fluorescent markers to isolate a group of cells called Dorsal Root Ganglion (DRG) neurons in mice.
Dr. O'Shea's team began trying to isolate a protein, called JAK3, that latches on to some immune cells.
