Word: blockings
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Dates: during 2000-2009
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...contraceptive treatments have been shown to be 100% effective in clinical trials. But studies have also shown that 10% to 15% of men don't respond to hormonal treatments at all - a fairly high nonresponder rate. Researchers don't yet know how to explain those failures. One inherent stumbling block is that a male contraceptive must block millions of sperm, as opposed to a single egg. (The Pill had it easy.) Another is race: according to several proof-of-concept studies, Asian men maintained a suppressed sperm count with greater frequency than Caucasians, but researchers still don't know...
...which college students supervise youths on work assignments such as planting flowers and collecting trash. The recent Friday Movie Night and Variety Show drew some 200 kids. In the fall, the church sponsors ACT- and SAT-prep courses, and hires college students as role models. "You go one block, and you're smack dab in the middle of the negative pathologies," Hatch says. "Outside of here, academic excellence is frowned upon. They'll tell you, 'you're trying to be white.' But here," he adds, "we're creating a counter-cultural oasis to the negativity...
...that motor nerves die after exposure to a toxic compound released by other nerve cells in the spinal cord. The Harvard and Columbia groups are hoping to test that idea in the lab: if the cells in culture release the same agent, then finding drug compounds that block the damaging effects of the toxin could preserve neurons and hold off the paralyzing effects of the disease...
...friend, Ralph, throws a different kind of stumbling block his way. "I don't know," says Ralph, when pressed for the details of a drunken fracas in which he and Carr were involved. "You're asking one guy who is drunk and stoned if his memory matches the other guy's who's drunk and stoned...
Power-sharing negotiations between Robert Mugabe's government and Zimbabwe's opposition Movement for Democratic Change (MDC) have hit their first stumbling block: Weeklong talks were adjourned after the MDC rejected as "insulting" the government's offer to make opposition leader Morgan Tsvangirai one of three vice presidents. (Tsvangirai won more votes than Mugabe in the first round of presidential polling on March 29; he withdrew from the runoff race in the face of a campaign of violence against opposition supporters by security forces and militias loyal to Mugabe.) An MDC source at the talks in Pretoria, South Africa, told...