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...separate area of research, Xie at Massachusetts General tested another anesthetic, isoflurane, on a culture of human brain cells. (Isoflurane had already been shown to cause cognitive impairment in rats.) He saw a vicious cycle of apoptosis and the accumulation of beta-amyloid protein - the sticky plaques that build up in Alzheimer's patients' brains - among the cells. But in this case, it may have been an excess of calcium that led to cell death. Xie and his colleagues have since found that the Alzheimer's drug memantine, which works by reducing calcium levels inside cells, can slow the rate...
...Whether these two areas of research are related was a topic of debate at the annual convention of the American Society of Anesthesiologists (ASA) in New Orleans in late October. So too was their clinical significance. No population study has ever conclusively linked anesthetic drugs to Alzheimer's or dementia. (Although doctors have long noted that about 10% of patients who receive anesthetics for major surgery experience a temporary period of "post-operative cognitive decline" after coming out of anesthesia, the condition is not limited to elderly patients, and it could be the result of inflammation or other stress responses...
...That's not to say that Thompson's research is the final word on the debate. Indeed, glacier experts have been waging an intellectual war for years over what's really causing the ice loss atop Kilimanjaro. The simplest explanation would be that warming temperatures are making the ice melt - and indeed, Thompson believes this is a big part of what's going...
...other scientists insist that melting, if it's occurring at all, has a relatively minor effect. "The fact that you have melting may mean air temperatures have increased, but it doesn't necessarily," says Philip Mote, who heads the Oregon Climate Change Research Institute at Oregon State University. "And in fact, the temperature on the summit of Kilimanjaro is essentially always below freezing, which makes it hard to accept warming as the reason [for glacier loss...
...students the first to be granted the privilege to remain on campus during that time—those in residence should behave responsibly so as not to ruin the chances of future applicants to receive housing during what, for many, is bound to be a crucial period for training, research, and intellectual activity...