Rabu, 27 Juli 2016

ScienceDaily: Top Science News

ScienceDaily: Top Science News

Dirty to drinkable: Novel hybrid nanomaterials quickly transform water

Posted: 26 Jul 2016 10:16 AM PDT

A team of engineers has found a way to use graphene oxide sheets to transform dirty water into drinking water, and it could be a global game-changer.

Repeated experiences of racism most damaging to mental health

Posted: 26 Jul 2016 09:40 AM PDT

For the first time, research reveals how harmful repeated racial discrimination can be on mental and physical health. The study looked at the accumulation of experiences of racial attacks over time including being shouted at, being physically attacked, avoiding a place, or feeling unsafe because of one's ethnicity.

New species of beaked whale confirmed by DNA

Posted: 26 Jul 2016 09:37 AM PDT

Biologists have identified a rare new species of beaked whale that ranges from northern Japan across the Pacific Ocean to Alaska's Aleutian Islands.

Biological explanation for wheat sensitivity found

Posted: 26 Jul 2016 09:36 AM PDT

People with non-celiac wheat sensitivity have a weakened intestinal barrier, which leads to a systemic immune response after ingesting wheat and related cereals, new research confirms.

Decade-long cooling cycle: Middle atmosphere in sync with ocean

Posted: 26 Jul 2016 09:36 AM PDT

In the late 20th century scientists observed a cooling at the transition between the troposphere and stratosphere at an altitude of about 15 kilometers. Climate scientists now show that the cooling could also be part of a natural decadal variation which is controlled by the water temperature of the Pacific.

Nottingham Dollies prove cloned sheep can live long and healthy lives

Posted: 26 Jul 2016 09:29 AM PDT

Three weeks after the scientific world marked the 20th anniversary of the birth of Dolly the sheep, new research has shown that four clones derived from the same cell line -- genomic copies of Dolly -- reached their 8th birthdays in good health.

Puzzling paucity of large craters on dwarf planet Ceres

Posted: 26 Jul 2016 09:29 AM PDT

A team of scientists has made a puzzling observation while studying the size and distribution of craters on the dwarf planet Ceres -- the largest object in the tumultuous Main Asteroid Belt between Mars and Jupiter. Scientists think Ceres' missing large craters may have been erased over time, as a result of its peculiar composition and internal evolution.

Sexual rivalry may drive frog reproductive behaviors

Posted: 26 Jul 2016 09:29 AM PDT

Biologists have long thought that some frogs evolved to mate on land instead of in water to better guard eggs and tadpoles from predation. New research now suggests that mating on land in many species might be a strategy male frogs use to ensure that their own DNA gets passed on, instead of their rivals'. Sexual selection may trump natural selection in the evolution of these reproductive behaviors.

Any picture or text could be inkjet-printed as a solar cell

Posted: 26 Jul 2016 06:44 AM PDT

Any picture or text could be inkjet-printed as a solar cell, using a newly developed technology. When light is absorbed in an ordinary ink, it generates heat. A photovoltaic ink, however, coverts part of that energy to electricity. The darker the color, the more electricity is produced, because the human eye is most sensitive to that part of the solar radiation spectrum which has highest energy density.

From vision to hand action: Neuroscientists decipher how our brain controls grasping movements

Posted: 26 Jul 2016 06:42 AM PDT

Our hands are highly developed grasping organs that are in continuous use. Long before we stir our first cup of coffee in the morning, our hands have executed a multitude of grasps. Directing a pen between our thumb and index finger over a piece of paper with absolute precision appears as easy as catching a ball or operating a doorknob. Now neuroscientists have studied how the brain controls the different grasping movements. In their research with rhesus macaques, it was found that the three brain areas that are responsible for planning and executing hand movements, perform different tasks within their neural network.

Male hormone reverses cell aging in clinical trial

Posted: 25 Jul 2016 07:40 PM PDT

Sex hormones can stimulate production of telomerase, an enzyme naturally found in the human organism, new research shows. The strategy was tested in patients with genetic diseases associated with mutations in the gene that codes for this enzyme, such as aplastic anemia and pulmonary fibrosis. The authors say that the results suggest that the approach can combat the damage caused to the organism by telomerase deficiency.
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