Minggu, 30 Januari 2011

ScienceDaily Top Science Headlines

for Sunday, January 30, 2011

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Learn more quickly by transcranial magnetic brain stimulation, study in rats suggests (January 29, 2011) -- What sounds like science fiction is actually possible: thanks to magnetic stimulation, the activity of certain brain nerve cells can be deliberately influenced. What happens in the brain in this context has been unclear up to now. Medical experts have now shown that various stimulus patterns changed the activity of distinct neuronal cell types. In addition, certain stimulus patterns led to rats learning more easily. ... > full story

Mini-strokes leave 'hidden' brain damage (January 29, 2011) -- A transient ischemic attack is sometimes known as a mini-stroke. New research shows these attacks may not be transient at all. They in fact create lasting damage to the brain. ... > full story

Cocaine production increases destruction of Colombia’s rainforests (January 29, 2011) -- Scientists are reporting new evidence that cultivating coca bushes, the source of cocaine, is speeding up destruction of rainforests in Colombia and threatening the region's "hotspots" of plant and animal diversity. The findings underscore the need for establishing larger protected areas to help preserve biodiversity. ... > full story

Growth spurt? 'Catch-up' growth signals revealed (January 29, 2011) -- Researchers have uncovered molecular signals that regulate catch-up growth -- the growth spurt that occurs when normal conditions are restored after a fetus, young animal or child has been ill, under stress or deprived of enough food or oxygen to grow properly. ... > full story

New glasses change lens color on the fly (January 29, 2011) -- New protective eyewear will eliminate the need for warfighters to stop to change out colored lenses to accommodate differences in light levels. ... > full story

Presence of peers heightens teens' sensitivity to rewards of a risk (January 29, 2011) -- Teenagers take more risks when they are with their friends. A new study sheds light on why. The findings demonstrate that when teens are with their friends they are more sensitive to the rewards of a risk than when alone. ... > full story

DNA caught rock 'n rollin': On rare occasions DNA dances itself into a different shape (January 29, 2011) -- DNA, that marvelous, twisty molecule of life, has an alter ego, research reveals. On rare occasions, its building blocks "rock and roll," deforming the familiar double helix into a different shape. ... > full story

Premature infants' lungs may improve with better nutrition (January 29, 2011) -- Improving lung function in premature babies with a severe lung disease may be linked to their feeding regimen, according to a new study. ... > full story

More frequent drought likely in eastern Africa (January 29, 2011) -- The increased frequency of drought observed in eastern Africa over the last 20 years is likely to continue as long as global temperatures continue to rise, according to new research. This poses increased risk to the estimated 17.5 million people in the Greater Horn of Africa who currently face potential food shortages. ... > full story

Voice-saver: Light therapy for early-stage laryngeal cancer (January 29, 2011) -- A new study finds light, or photodynamic therapy, can help preserve the voice in patients with early stage laryngeal cancer. Photodynamic therapy works by destroying deadly cancer cells without harming surrounding healthy tissue by using a powerful laser and a nontoxic, light-activated drug. It also has fewer side-effects than radiation and surgery. ... > full story

Draft 'genetic road map' of biofuels crop (January 29, 2011) -- The first rough draft of a "genetic road map" of a biomass crop, prairie cordgrass, is giving scientists an inside look at the genes of one of the crops that may help produce the next generation of biofuels. ... > full story

Helping others helps alcoholics stay on the road to recovery (January 29, 2011) -- Participating in community service activities and helping others is not just good for the soul; it has a healing effect that helps alcoholics and other addicts become and stay sober, new research shows. ... > full story

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