Scanning tunneling microscope made 100 to 1000 times faster

From physorg.com, using an existing technique in a novel way, Cornell physicist Keith Schwab and colleagues at Cornell and Boston University have made the scanning tunneling microscope (STM) — which can image individual atoms on a surface — at least 100 times faster. The simple adaptation, based on a method of measurement currently used in …

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Discovery of first gene that specifically links calorie restriction to longevity

Loss of only one of the genes, a gene encoding the protein PHA-4, negated the lifespan-enhancing effect of calorie-restriction in worms. And, when researchers undertook the opposite experiment—by overexpressing pha-4 in worms—the longevity effect was enhanced. “PHA-4 acts completely independent of insulin/IGF-1 signaling and turns out to be essential for CR-mediated longevity,” says Panowski. “We …

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Bacteria resistant artificial skin

Skin cells genetically engineered to be resistant to bacteria could reduce infections and improve chances of survival among burn victims. A patient’s skin cells, genetically modified and grown in a test tube, could provide the next generation of artificial skin. As a first step in creating such replacement skin, scientists in Cincinnati have engineered bacteria-resistant …

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