ScienceDaily Top Science Headlines -- for Saturday, June 18, 2011 ~ laniertech

Sabtu, 18 Juni 2011

ScienceDaily Top Science Headlines -- for Saturday, June 18, 2011

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ScienceDaily Top Science Headlines

for Saturday, June 18, 2011

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Spectacular Hubble view of Centaurus A (June 17, 2011) -- The NASA/ESA Hubble Space Telescope has produced a close-up view of the galaxy Centaurus A. Hubble's out-of-this-world location and world-class Wide Field Camera 3 instrument reveal a dramatic picture of a dynamic galaxy in flux. ... > full story

Tapeworm drug inhibits colon cancer metastasis (June 17, 2011) -- A compound that for about 60 years has been used as a drug against tapeworm infection is also apparently effective against colon cancer metastasis, as studies using mice have shown. The compound silences a gene that triggers the formation of metastases in colon cancer. Researchers in Germany made this discovery in collaboration with researchers in the U.S. Plans are already underway to conduct a clinical trial. ... > full story

Size matters -- in virulent fungal spores -- and suggests ways to stop a killer (June 17, 2011) -- Scientists have found that larger fungal spores can be more lethal. Their findings about two different spore sizes of the fungus Mucor circinelloides, a pathogen that kills half or more of its victims, could help to develop new treatments and fight other types of fungal infections. Mucor infection is in the news as an environmental fungus contracted by people who had trauma in the wake of tornadoes in Joplin, Mo. ... > full story

Surgeons perform first prosthetic bypass graft with patient's stem cells at point-of-care (June 17, 2011) -- The first three patients to undergo an investigational surgical procedure for peripheral vascular disease that involves the patient's own stem cells continue to do well, say doctors . The "TGI-PVG IDE" clinical trial initiated at the University of Louisville involves using a patient's own stem cells to line artificial bypass grafts to better the chances at saving the limbs of patients with peripheral artery disease. ... > full story

Nitrogen-fixing bacterial symbiont promises trove of natural products (June 17, 2011) -- Soil-dwelling bacteria of the genus Frankia have the potential to produce a multitude of natural products, including antibiotics, herbicides, pigments, anticancer agents, and other useful products, according to new research. ... > full story

Look before you leap: Teens still learning to plan ahead (June 17, 2011) -- Researchers studied strategic planning and problem solving among 890 10-30 year-olds using a computerized test called the Tower of London. Older test takers did better on the tower test, showing a greater ability to plan ahead and solve problems. On the hardest problems, mature performance wasn't seen until at least age 22. These findings have implications for programs that target adolescents' still-emerging capacity to plan ahead, control impulses, regulate emotions, and resist peer pressure. ... > full story

Scientists turn memories off and on with flip of switch (June 17, 2011) -- Scientists have developed a way to turn memories on and off -- literally with the flip of a switch. Using an electronic system that duplicates the neural signals associated with learning, they replicated the brain function in rats associated with long-term learned behavior, even when the rats had been drugged to forget. "Flip the switch on, and the rats remember. Flip it off, and the rats forget," said the leader of the team reporting the result. ... > full story

Shorter sleep durations may increase genetic risks for obesity (June 17, 2011) -- A recent study found that the heritability of self-reported, habitual sleep duration was 32 percent, and shared environmental influences on sleep duration were negligible. Longer sleep duration was associated with decreased body mass index. Behavioral genetic modeling found that the heritability of self-reported BMI when sleep duration equaled seven hours was more than twice as large as the heritability of BMI when sleep duration equaled nine hours. The study involved 1,811 pairs of identical and fraternal twins. ... > full story

Coming to TV screens of the future: A sense of smell (June 17, 2011) -- In a new paper, engineers demonstrate that it is possible to generate odor, at will, in a compact device small enough to fit on the back of your TV with potentially thousands of odors. ... > full story

Survival niche for cancer cells (June 17, 2011) -- Cancer cells do not grow equally well everywhere in the body. Often, they first create the conditions in which they can grow. Immunologists and hematologists have now shown that specific forms of lymphoma also create their own survival niche. ... > full story

ATV preparing for fiery destruction (June 17, 2011) -- ATV Johannes Kepler has been an important part of the International Space Station since February. Next week, it will complete its mission by undocking and burning up harmlessly in the atmosphere high over an uninhabited area of the Pacific Ocean. ... > full story

Poor 'gut sense' of numbers contributes to persistent math difficulties (June 17, 2011) -- Having a poor "gut sense" of numbers can lead to a mathematical learning disability and difficulty in achieving basic math proficiency. This inaccurate number sense is just one cause of math learning disabilities, according to researchers. ... > full story

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