'Good Bacteria' In Women Give Clues For Slowing HIV Transmission
'Good Bacteria' In Women Give Clues For Slowing HIV Transmission
Beneficial bacteria found in healthy women help to reduce the amount of vaginal HIV among HIV-infected women and make it more difficult for the virus to spread, boosting the possibility that "good bacteria" might someday be tapped in the fight against HIV.
New Devices To Boost Nematode Research On Neurons And Drugs
Two new nanotech-driven tools for biologists and neuroscientists have been developed. A pair of new thin, transparent devices, constructed with soft lithography, should boost research in which nematodes are studied to explore brain-behavior connections and to screen new pharmaceuticals for potential treatment of parasitic infections in humans, report scientists.
Treadle-powered Water Pumps Help Desert Agriculture
The parched landscape of Sudan, on the southern edge of the Sahara desert, is among the world's driest regions, with a nine-month dry season and a highly unreliable rainy season. Large-scale farmers there manage to grow about half of the impoverished nation's food production with the help of motorized irrigation pumps, but for individual subsistence farmers and their families -- about two-thirds of the nation's 40 million people -- growing crops mostly means hauling water by hand in buckets.
Novel Compound May Lessen Heart Attack Damage, Initial Tests Show
A novel drug designed to lessen muscle damage from a heart attack has passed initial safety tests in humans. Researchers said that many people may not realize that the heart suffers damage at two major points in a heart attack: first, when a blockage in a coronary artery prevents blood and oxygen from getting to the heart, and then again when the patient undergoes PCI and normal blood flow is restored through reperfusion.
Hearing The Sound Of Quantum Drums
Forty years ago, mathematician Mark Kac asked the theoretical question, "Can one hear the shape of a drum?" If drums of different shapes always produce their own unique sound spectrum, then it should be possible to identify the shape of a specific drum merely by studying its spectrum, thus "hearing" the drum's shape (a procedure analogous to spectroscopy, the way scientists detect the composition of a faraway star by studying its light spectrum). But what if two drums of different shapes could emit exactly the same sound? If so, it would be impossible to work backward from the spectrum and uniquely surmise the physical structure of the drum, because there would be more than one correct answer to the question. The drum research is important to the world of quantum mechanics.
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