viernes, 15 de agosto de 2014

ScienceDaily: Most Popular News

ScienceDaily: Most Popular News


Forces that hold rapidly spinning near-Earth asteroid together discovered

Posted: 13 Aug 2014 10:20 AM PDT

Astronomers studied near-Earth asteroid 1950 DA and discovered that the body, which rotates extremely quickly, is held together by cohesive forces called van der Waals, never detected before on an asteroid.

Involuntary eye movement a foolproof indication for ADHD diagnosis

Posted: 13 Aug 2014 10:10 AM PDT

Attention deficit hyperactivity disorder (ADHD) is the most commonly diagnosed -- and misdiagnosed -- behavioral disorder in American children. Now a new study can provide the objective tool medical professionals need to accurately diagnose ADHD. The study indicates that involuntary eye movements accurately reflect the presence of ADHD.

Mouth bacteria can change its diet, supercomputers reveal

Posted: 12 Aug 2014 01:38 PM PDT

Mouth bacteria can change their metabolism in disease versus health. The Stampede and Lonestar supercomputers compared gene expression of 160,000 genes in healthy and diseased periodontal communities. Research paves way for biomarkers to predict illness from wide-ranging diseases such as periodontitis, diabetes, and Crohn's disease.

Contrary to popular belief, more exercise is not always better

Posted: 12 Aug 2014 10:37 AM PDT

There is strong epidemiological evidence of the importance of regular physical activity, such as brisk walking and jogging, in the management and rehabilitation of cardiovascular disease and in lowering the risk of death from other diseases such as hypertension, stroke, and type 2 diabetes. The Physical Activity Guidelines for Americans recommends about 150 minutes per week of moderate-intensity exercise or about 75 minutes of vigorous-intensity exercise. But there is clear evidence of an increase in cardiovascular deaths in heart attack survivors who exercise to excess.

Our ancestor's 'leaky' membrane answers big questions in biology

Posted: 12 Aug 2014 09:17 AM PDT

All life on Earth came from one common ancestor -- a single-celled organism -- but what it looked like, how it lived and how it evolved into today's modern cells is a four billion year old mystery being solved by researchers at using mathematical modelling. Findings suggest for the first time that life's Last Universal Common Ancestor (LUCA) had a 'leaky' membrane, which helps scientists answer two of biology's biggest questions.

Can instant noodles lead to heart disease, diabetes and stroke?

Posted: 12 Aug 2014 09:16 AM PDT

Significant consumption of instant noodles -- ramen included -- may increase a person's risk for cardiometabolic syndrome, especially in women, research shows. The findings could shed new light on the risks of a worldwide dietary habit. "This research is significant since many people are consuming instant noodles without knowing possible health risks," one researcher said. "My hope is that this study can lay a foundation for future research about the health effects of instant noodle consumption."

Antarctic midge's genome is smallest in insects to date: Bare-bones genome is adaptation to deep freeze

Posted: 12 Aug 2014 09:13 AM PDT

Scientists who sequenced the genome of the Antarctic midge suspect the genome's small size -- the smallest in insects described to date -- can probably be explained by the midge's adaptation to its extreme living environment.

Size matters when convincing your brain to eat healthier foods

Posted: 11 Aug 2014 03:02 PM PDT

Playing with the portions of good and not-so-good-for-you foods is better than trying to eliminate bad foods, according to a study. The idea is to not give up entirely foods that provide pleasure but aren't nutritious. Instead, the focus should be on lowering the portion of the "vice" foods and correspondingly raising the portion of a healthy food to replace it, researchers report.

Synthetic molecule makes cancer self-destruct

Posted: 11 Aug 2014 12:16 PM PDT

A molecule that can cause cancer cells to self-destruct by ferrying sodium and chloride ions into the cancer cells has been developed by scientists. These synthetic ion transporters confirm a two-decades-old hypothesis that could point the way to new anticancer drugs while also benefiting patients with cystic fibrosis.

'Worm pill' could ease autoimmune disease symptoms

Posted: 11 Aug 2014 09:51 AM PDT

Experts believe a molecule in parasitic worms could help explain why worm infections can effectively treat a range of autoimmune diseases, including multiple sclerosis, psoriasis, rheumatoid arthritis and lupus. The study successfully identified peptides from parasitic worms that suppress the body's immune response. Researchers believe this could pave the way for a new drug containing the peptide to provide relief from the symptoms of autoimmune diseases.

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