Tag: "imperfect" at biology news

Amphibians in losing race with environmental change

...st. But evolution is an erratic, often slow and imperfect system, and the complexities of amphibian life cycles makes them more immediately vulnerable than many other species, the researchers said. ...

No carrier necessary: This drug delivers itself

...he toxicity in the body, they have been considered imperfect solutions. “Unlike formulations that require separate delivery systems, once this drug is approved, no additional approvals will be needed,?said Prasad. “Our published data in animal models demonstrate no difference in drug activity with the n...

Paleontologists learn how not to become a fossil

... fossil record and why. "Everyone talks about how imperfect the fossil record is, but not many people do anything about it," said David Jablonski, the William Kenan Jr. Professor in Geophysical Sciences at the University of Chicago. "We're not doing this for the sake of knowing more about clams, but for knowi...

Agricultural antibiotic use contributes to 'super-bugs' in humans

..., bacteria occasionally survive the formidable but imperfect gastric barrier to colonize the gut - which in turn may transmit the resistant bacteria to humans. Smith and colleagues say that the transmission of antibiotic resistant bacteria from animal to human populations is difficult to measure, as it is "th...

Stem cells bring fast direct improvement, without differentiation, in acute renal failure

...f ARF used in the study is "a suitable if somewhat imperfect model of the most common and the most treatment-resistant type of human ischemic ARF." Next steps * Current studies are investigating the collective and individual renoprotective capacity of cytokines temporarily released by MSC. * Two cli...

Birds brains reveal source of songs

... young zebra finch nursery resounds with ever-new, imperfect variations of the adult songs. Gradually, the youngsters' songs become less variable and more true to the old standards. Some years ago, Bottjer had observed that disabling a young finch's AFP circuit stopped the learning in midstream. The bird still...

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