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Saturday, December 13, 2014

ScienceDaily: Most Popular News

ScienceDaily: Most Popular News

New 'high-entropy' alloy is as light as aluminum, as strong as titanium alloys

Posted: 10 Dec 2014 11:08 AM PST

Researchers have developed a new 'high-entropy' metal alloy that has a higher strength-to-weight ratio than any other existing metal material.

Abandoned wells can be 'super-emitters' of greenhouse gas

Posted: 09 Dec 2014 09:04 AM PST

Researchers have uncovered a previously unknown, and possibly substantial, source of the greenhouse gas methane to Earth's atmosphere. After testing a sample of abandoned oil and natural gas wells in northwestern Pennsylvania, the researchers found that many of the old wells leaked substantial quantities of methane. Because there are many abandoned wells nationwide, the researchers believe the overall contribution of leaking wells could be significant.

Are you helping your toddler's aggressive behavior?

Posted: 09 Dec 2014 07:10 AM PST

Physical aggression in toddlers has been thought to be associated with the frustration caused by language problems, but a recent study shows that this isn't the case. The researchers did find, however, that parental behaviors may influence the development of an association between the two problems during early childhood. Frequent hitting, kicking, and a tendency to bite or push others are examples of physical aggression observed in toddlers.

Astronomers identify gas spirals as a nursery of twin stars through ALMA

Posted: 09 Dec 2014 05:16 AM PST

Astronomers have found spiral arms of molecular gas and dust around the "baby twin" stars, binary protostars. Gas motions to supply materials to the twin were also identified. These observational results unveil, for the first time, the mechanism of the birth and growth of binary stars, which are ubiquitous throughout the universe.

Shedding new light on the formation of emotional fear memories

Posted: 08 Dec 2014 12:25 PM PST

Everyday events are easy to forget, but unpleasant ones can remain engraved in the brain. A new study identifies a neural mechanism through which unpleasant experiences are translated into signals that trigger fear memories by changing neural connections in a part of the brain called the amygdala. The findings show that a long-standing theory on how the brain forms memories, called Hebbian plasticity, is partially correct, but not as simple as was originally proposed.

Adult-onset diabetes, obesity cured in lab mice, scientists report

Posted: 08 Dec 2014 11:44 AM PST

A new treatment for adult-onset diabetes and obesity has essentially cured lab animals of obesity, diabetes and associated lipid abnormalities through improved glucose sensitivity, reduced appetite and enhanced calorie burning.

Chemicals released during natural gas extraction may harm reproduction, development

Posted: 05 Dec 2014 02:50 PM PST

Unconventional oil and gas operations combine directional drilling and hydraulic fracturing to release natural gas from rock. Discussions have centered on potential air and water pollution from chemicals and how they affect the more than 15 million Americans living within one mile of UOG operations. Now, a researcher has conducted the largest review of research centered on fracking byproducts and their effects on human reproductive and developmental health.

Stick out your tongue: Tongue appearance and illness

Posted: 05 Dec 2014 08:39 AM PST

The tongue can betray signs of illness, which combined with other symptoms such as a cough, fever, presence of jaundice, headache or bowel habits, can help a physician offer a diagnosis. For people in remote areas who do not have ready access to a physician, a new diagnostic system works to combine the soft inputs of described symptoms with a digital analysis of an image of the patient's tongue.

New research paves the way for nano-movies of biomolecules

Posted: 05 Dec 2014 07:03 AM PST

Scientists have caught a light sensitive biomolecule at work using an X-ray laser. Their new study proves that high speed X-ray lasers can capture the fast dynamics of biomolecules in ultra slow-motion, revealing subtle processes with unprecedented clarity.

Antioxidant capacity of orange juice is multiplied tenfold

Posted: 05 Dec 2014 06:37 AM PST

The antioxidant activity of citrus juices and other foods is undervalued, experts say. A new technique for measuring this property generates values that are ten times higher than those indicated by current analysis methods. The results suggest that tables on the antioxidant capacities of food products that dieticians and health authorities use must be revised. Orange juice and juices from other citrus fruits are considered healthy due to their high content of antioxidants, which help to reduce harmful free radicals in our body, but a new investigation shows that their benefits are greater than previously thought.

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