science / Top Stories
White House Affirms Deal on Drug CostAn agreement to shield drug makers from bearing further costs in the health care overhaul exposed a risky game the Obama administration has played.
International Herald Tribune Thursday, August 06, 2009Heart-Lung Machine May Not Be the Culprit in Post-Op ''Pump Head'' SyndromeIn the months after he had surgery to fix his defective heart valve, Bruce Stutz didn't feel quite the same. It wasn't his physical fitness that was subpar, although that did require some post-op retraining, but rather his mental capacity. "I couldn't muster the concentration to deal with the problem," he wrote in a 2003 article for Scientific American . [More]
Scientific American Thursday, August 06, 2009Whatever Happened to the Mars Rovers?Natural Quasicrystals First cooked up in the lab in 1984, quasicrystals are unusual substances that lie somewhere between the crystalline and the amorphous. Specifically, they display ordered arrangements and symmetries but are not periodic--that is, they are not defined by a single unit cell (such as a cube) that repeats itself in three dimensions [see “Quasicrystals”; SciAm, August 1986]. [More]
Scientific American Thursday, August 06, 2009Live recordings of cell communicationA new method for nanoscale imaging of vesicle-fusion -- vesicles are biological nanosized containers -- could add to our understanding of diseases of the nervous system and viral infections. This could be useful in developing a cure for neurological diseases and mental disorders. Researchers from the
university of Copenhagen are behind the new data, which have recently been published in the prestigious scientific journal PNAS.
Eurekalert.org Thursday, August 06, 2009Unstable proteins can cause premature ageingThe normal aging process has long been linked to problems with cell respiration, the process through which the cells extract energy from nutrients. Researchers at the Swedish medical
university Karolinska Institutet have now shown how certain proteins that are synthesized in the cellular mitochondria -- popularly known as the cells' power plants -- become unstable and disintegrate, which in turn can impair cell respiration and cause premature aging.
Eurekalert.org Thursday, August 06, 2009Is bilateral liver resection safe for bilateral intrahepatic stones?Hepatectomy has become the optimal treatment for intrahepatic stones. For the subgroup of patients with bilateral intrahepatic stones, the feasibility and outcomes of bilateral liver resection have not been clarified.
Eurekalert.org Thursday, August 06, 2009New cancer drug delivery system is effective and reversibleCancer drugs must be effective. But they must also target cancer cells and spare healthy cells. And -- ideally -- they'll come with an easy antidote.
university of Illinois researchers report that they have developed a cancer drug
delivery system that achieves all of the above.
Eurekalert.org Thursday, August 06, 2009Internists tackle key health reform issuesMonographs addressing individual mandates, tax exclusion and a public plan option were released today by the American College of Physicians. The new policy papers are: "Individual Mandates in Health Insurance Reform"; "Reforming the Tax Exclusion for Health Insurance"; and "A Public Plan Option in a Health Insurance Connector."
Eurekalert.org Thursday, August 06, 2009Chicken-hearted tyrantsIt will break every pre-schooler's heart: Tyrannosaurus rex and other predatory dinosaurs might not have been fearless hunters after all. Based on fossil evidence researchers at LMU Munich propose that the large carnivores hunted mainly juvenile dinosaurs instead of giant herbivorous adults.
Eurekalert.org Thursday, August 06, 2009Brazil returns hazardous UK wasteSome 1,500 tons of hazardous waste that arrived from the UK from Brazil labelled as recyclable plastic is returned.
BBC Thursday, August 06, 2009 1 2 3 4 5 6
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