Τρίτη 30 Οκτωβρίου 2012

ScienceDaily: Latest Science News

ScienceDaily: Latest Science News


Risk factors predict childhood obesity, researchers find

Posted: 29 Oct 2012 04:52 PM PDT

High birth weight, rapid weight gain and having an overweight mother who smokes can all increase the risk of a baby becoming obese later in childhood, research by experts has found.

Decline in incidence of heart attacks appears associated with smoke-free workplace laws

Posted: 29 Oct 2012 02:09 PM PDT

A decline in the incidence of myocardial infarction (MI, heart attack) in one Minnesota county appears to be associated with the implementation of smoke-free workplace laws.

Overweight, obesity in adolescents linked with increased risk for end-stage renal disease over time

Posted: 29 Oct 2012 02:09 PM PDT

Being overweight and obese during adolescence appears related to an increased risk of all-cause treated end-stage renal disease during a 25-year period.

Smoke-free laws led quickly to fewer hospitalizations

Posted: 29 Oct 2012 02:09 PM PDT

Comprehensive smoke-free laws were associated with a rapid 15 percent decrease in hospitalizations for heart attacks, 16 percent for stroke and 24 percent for asthma and other respiratory hospitalizations. The most comprehensive laws -- those covering workplaces, restaurants and bars -- resulted in more health benefits.

Migraine in children may affect school performance

Posted: 29 Oct 2012 02:08 PM PDT

Children with migraine are more likely to have below average school performance than kids who do not have headaches, according to new research.

NASA examines Hurricane Sandy as it affects the Eastern U.S.

Posted: 29 Oct 2012 01:38 PM PDT

On Monday, Oct. 29, Hurricane Sandy was ravaging the Mid-Atlantic with heavy rains and tropical storm force winds as it closed in for landfall. Earlier, NASA's CloudSat satellite passed over Hurricane Sandy and its radar dissected the storm get a profile or sideways look at the storm. NASA's Aqua satellite provided an infrared view of the cloud tops and NOAA's GOES-13 satellite showed the extent of the storm. The National Hurricane Center reported at 11 a.m. EDT on Oct. 29 that Hurricane Sandy is "expected to bring life-threatening storm surge and coastal hurricane winds plus heavy Appalachian snows."

More than good vibes: Researchers propose the science behind mindfulness

Posted: 29 Oct 2012 01:14 PM PDT

Achieving mindfulness through meditation has helped people maintain a healthy mind by quelling negative emotions and thoughts, such as desire, anger and anxiety, and encouraging more positive dispositions such as compassion, empathy and forgiveness. Those who have reaped the benefits of mindfulness know that it works. But how exactly does it work?

Quick release bandage tape: No more tears from tears

Posted: 29 Oct 2012 12:43 PM PDT

Scientists have invented a quick-release tape that has the strong adhesion properties of commercial medical tape, but without the ouch factor upon removal.

New study sheds light on how and when vision evolved

Posted: 29 Oct 2012 12:43 PM PDT

Opsins, the light-sensitive proteins key to vision, may have evolved earlier and undergone fewer genetic changes than previously believed, according to a new study.

Researchers engineer cartilage from pluripotent stem cells

Posted: 29 Oct 2012 12:43 PM PDT

Researchers have engineered cartilage from induced pluripotent stem cells that were successfully grown and sorted for use in tissue repair and studies into cartilage injury and osteoarthritis.

Boys are more likely than girls to abuse over-the-counter drugs

Posted: 29 Oct 2012 12:42 PM PDT

As crackdowns get tougher on alcohol, tobacco sales, and illicit drugs, there's a growing trend among youth to turn to another source to get high: their parent's medicine cabinet. New research suggests boys are more likely than girls to abuse over-the-counter drugs.

Common bond between school bullies and their targets: Alcohol abuse

Posted: 29 Oct 2012 12:42 PM PDT

A new study finds that both school bullies and their victims are likely to abuse alcohol after a bullying episode.

For many prostate cancer patients, web sites are too difficult to read

Posted: 29 Oct 2012 12:42 PM PDT

Ninety million American adults read below high school levels. But a study has found that only 4.8 percent of web sites describing prostate cancer were written below a high school reading level. The median reading level was 12th grade.

Mummy unwrapping brought Egyptology to the public

Posted: 29 Oct 2012 12:42 PM PDT

Public "unwrappings" of real mummified human remains performed by both showmen and scientists heightened the fascination, but also helped develop the growing science of Egyptology, says a historian.

Genetic basis of cardiac, craniofacial birth defects identified

Posted: 29 Oct 2012 12:42 PM PDT

Researchers have made important advances in the rapidly-expanding field of "regenerative medicine," outlining for the first time connections in genetic regulation that normally prevent birth defects in heart and facial muscles. This basic research will provide a road map to ultimately allow scientists to grow the cell types needed to repair such defects, from stem cells that can be generated from a person's own body.

Mass extinction study provides lessons for modern world

Posted: 29 Oct 2012 12:42 PM PDT

The Cretaceous Period of Earth history ended with a mass extinction that wiped out numerous species, most famously the dinosaurs. A new study now finds that the structure of North American ecosystems made the extinction worse than it might have been.

Archery fad by kids could shoot up shoulder, arm, hand injuries

Posted: 29 Oct 2012 10:35 AM PDT

With so many youngsters picking up the sport/hobby of archery thanks to its increased popularity in TV shows like "Revolution" and movies like "The Hunger Games" and "Brave," Harris Health System rehabilitation and pediatric experts caution parents about the potential dangers of long-term injuries to hands, wrists, arms and shoulders.

Additional Kepler data now available to all planet hunters

Posted: 29 Oct 2012 10:35 AM PDT

Twelve additional months worth of planet-searching data meticulously collected by one of the most prolific planet-hunting endeavors ever conceived, NASA's Kepler Mission, has just been released.

We live our lives within our media, rather than simply with it, expert says

Posted: 29 Oct 2012 10:18 AM PDT

An expert takes on the prevailing notion of his peers in media and communications research -- that the media and its related devices have an effect on us and that the more we use them, the more they shape our lives.

Early autism intervention improves brain responses to social cues

Posted: 29 Oct 2012 10:18 AM PDT

An autism intervention program that emphasizes social interactions and is designed for children as young as 12 months has been found to improve cognitive skills and brain responses to faces, considered a building block for social skills. The researchers say that the study is the first to demonstrate that an intensive behavioral intervention can change brain function in toddlers with autism spectrum disorders.

Mandatory flu vaccine for health care workers to protect patients

Posted: 29 Oct 2012 09:35 AM PDT

All health care workers in health care institutions should be vaccinated with the annual influenza vaccine to protect patients, argues an editorial.

Importance of citizens for building of a new nation brand

Posted: 29 Oct 2012 09:34 AM PDT

What role do new media play in creating the content of the concept of a nation? Today there's a great deal of interest in marketing the distinctive character of countries as brands in a global market. A sociologist shows that new media can be a positive democratic force when countries undergoing dramatic change seek a new national identity.

Antidepressant eases radiation-related mouth pain in head, neck cancer

Posted: 29 Oct 2012 08:12 AM PDT

An oral rinse of the antidepressant doxepin significantly eased pain associated with oral mucositis in patients receiving radiation therapy for cancers of the head and neck, a new study has found.

Huge deposit of Jurassic turtle remains found in China

Posted: 29 Oct 2012 08:12 AM PDT

"Bones upon bones, we couldn't believe our eyes," says one paleontologist. He was describing the spectacular find of some 1800 fossilized mesa chelonia turtles from the Jurassic era in China's northwest province of Xinjiang.

How to improve high-speed rail ties against freezing, thawing conditions

Posted: 29 Oct 2012 08:12 AM PDT

Engineers are helping high-speed rail systems handle the stress of freezing and thawing winter weather conditions.

Grading and supporting U.S. education: Study examines consequences of international comparisons

Posted: 29 Oct 2012 07:35 AM PDT

K-12 schools in the United States are often criticized for falling behind their counterparts in other countries, but a new study suggests that this "negative spin" does not increase public support for spending more to improve the nation's schools.

Titan supercomputer debuts: Computer churns through more than 20,000 trillion calculations each second

Posted: 29 Oct 2012 07:35 AM PDT

The U.S. Department of Energy's (DOE) Oak Ridge National Laboratory has just launched a new era of scientific supercomputing with Titan, a system capable of churning through more than 20,000 trillion calculations each second -- or 20 petaflops -- by employing a family of processors called graphic processing units first created for computer gaming. Titan will be 10 times more powerful than ORNL's last world-leading system, Jaguar, while overcoming power and space limitations inherent in the previous generation of high-performance computers.

Scientists decode 'software' instructions of aggressive leukemia cells

Posted: 29 Oct 2012 07:35 AM PDT

Scientists have decoded the key "software" instructions that drive three of the most virulent forms of acute lymphoblastic leukemia (ALL). They discovered ALL's "software" is encoded with epigenetic marks, chemical modifications of DNA and surrounding proteins, allowing the research team to identify new potential biomarkers and therapeutic targets.

Neurotransmitters linked to mating behavior are shared by mammals and worms

Posted: 29 Oct 2012 07:06 AM PDT

When it comes to sex, animals of all shapes and sizes tend behave in predictable ways. There may be a chemical reason for that. New research has shown that chemicals in the brain -- neuropeptides known as vasopressin and oxytocin -- play a role in coordinating mating and reproductive behavior in animals ranging from humans to fish to invertebrates.

Prostate cancer prognosis hope

Posted: 29 Oct 2012 06:31 AM PDT

Scientists have discovered a molecular 'tell' in laboratory experiments that could help doctors determine the severity of a patient's prostate cancer.

Proton therapy treatment preserves quality of life for men with prostate cancer, studies suggest

Posted: 29 Oct 2012 06:28 AM PDT

Two new studies have found that proton therapy preserves the quality of life, specifically urinary and bowel function, in men treated with this targeted radiation modality for prostate cancer.

Hopping robots could conserve energy

Posted: 29 Oct 2012 06:28 AM PDT

A new study shows that jumping can be more complicated than it might seem. In research that could extend the range of future rescue and exploration robots, scientists have found that hopping robots could dramatically reduce the amount of energy they use by adopting a unique two-part "stutter jump."

Where does a 500-pound sea lion spit?

Posted: 29 Oct 2012 06:28 AM PDT

One expert sees studying zoo animals as a perfect opportunity to continue his groundbreaking research on how saliva can signal stress, health risks, and illness in the human body, and apply this research to endangered species as well.

Stay-at-home transcription factor prevents neurodegeneration

Posted: 29 Oct 2012 06:27 AM PDT

A new study shows how a transcription factor called STAT3 remains in the axon of nerve cells to help prevent neurodegeneration. The findings could pave the way for future drug therapies to slow nerve damage in patients with neurodegenerative diseases.

NASA's TRMM Satellite analyzes Hurricane Sandy in 3-D

Posted: 29 Oct 2012 06:26 AM PDT

NASA's Tropical Rainfall Measuring Mission, or TRMM satellite, can measure rainfall rates and cloud heights in tropical cyclones, and was used to create an image to look into Hurricane Sandy on Oct. 28, 2012. Owen Kelly of NASA's Goddard Space Flight Center in Greenbelt, Md. created this image of Hurricane Sandy using TRMM data.

Insights into new therapy for rare form of cystic fibrosis

Posted: 29 Oct 2012 05:24 AM PDT

Scientists have established that a drug recently approved by the US Food and Drug Administration to treat a rare form of cystic fibrosis works in an unconventional way. Their results reveal new possibilities for treating various forms of cystic fibrosis.

Neutrons help explain why antibiotics prescribed for chemotherapy cause kidney failure

Posted: 29 Oct 2012 05:24 AM PDT

Neutron scattering experiments have provided new insights into the origin of the side effects of an antifungal drug prescribed all over the world. The analysis follows 40 years of debate and could help drug developers reduce these harmful complications.

Sudden cardiac death under age 40: Is exercise dangerous?

Posted: 29 Oct 2012 05:24 AM PDT

New research dispels a myth that sudden cardiac death often takes place during rigorous physical activity. In fact, the majority of events occur at home.

Peer pressure can be used for good when it comes to physical activity

Posted: 29 Oct 2012 05:24 AM PDT

Peer mentors can significantly influence the amount of physical activity kids have throughout the school day.

Atrial fibrillation is a 'modifiable' risk factor for stroke

Posted: 29 Oct 2012 05:22 AM PDT

There is good evidence that people with an irregular heart beat should have it checked by a doctor. The link between atrial fibrillation -- the most common disturbance of heart rhythm -- and risk of stroke is now beyond dispute, with studies indicating that diagnosed atrial fibrillation (AF) increases the risk of stroke five times. Similarly, one in five patients diagnosed with stroke are also found to have AF.

US shale gas drives up coal exports

Posted: 29 Oct 2012 05:22 AM PDT

The US is burning less coal due to shale gas production, however millions of tons of unused coal are being exported to the UK, Europe and Asia. As a result, the emissions benefits of switching fuels are overstated. US CO2 emissions from domestic energy have declined by 8.6% since a peak in 2005, the equivalent of 1.4% per year. However, the researchers warn that more than half of the recent emissions reductions in the power sector may be displaced overseas by the trade in coal.

How to make stem cells: Nuclear reprogramming moves a step forward

Posted: 29 Oct 2012 05:22 AM PDT

The idea of taking a mature cell and removing its identity (nuclear reprogramming) so that it can then become any kind of cell, holds great promise for repairing damaged tissue or replacing bone marrow after chemotherapy. New research shows that histone H3.3 deposited by the histone-interacting protein HIRA is a key step in reverting nuclei to a pluripotent type, capable of being any one of many cell types.

Enigmatic nematics: Law of hydrodynamics governing the way internally driven systems behave could explain their complex structure

Posted: 29 Oct 2012 05:22 AM PDT

Physicists use hydrodynamics to understand the physical mechanism responsible for changes in the long-range order of groups of particles. Researchers have now focused on ordered groups of elongated self-propelled particles. They have studied the breakdown of long-range order due to fluctuations that render them unstable and give rise to complex structures, in a new study.

Cocktail achieves superconducting boost: High-performance material uses iron and selenium

Posted: 29 Oct 2012 05:18 AM PDT

Physicists describe how they have synthesized a new material that belongs to the iron-selenide class of superconductors, called LixFe2Se2(NH3)y. This material displays promising superconducting transition temperatures of 44 Kelvins (K) at ambient pressure, thus improving upon traditional copper-based high-temperature superconductors.

Nanoparticles provide reinforcement for invisible braces in orthodontics

Posted: 29 Oct 2012 05:18 AM PDT

Braces made from clear plastic polymer used in dental correction orthodontics have produced very good results in recent years, especially in relation to the improved esthetics when compared to metal braces, but they do present certain problems of wear and tear within the mouth.

Super-massive black hole inflates giant bubble

Posted: 29 Oct 2012 05:18 AM PDT

Like symbiotic species, a galaxy and its central black hole lead intimately connected lives. The details of this relationship still pose many puzzles for astronomers.

Eye movements and the search for biomarkers for schizophrenia

Posted: 29 Oct 2012 05:18 AM PDT

There is a long history of research on impaired eye movements associated with schizophrenia. Using a series of simple viewing tests, researchers explored the ability of these eye movement tests to distinguish people with and without the diagnosis of schizophrenia. Using their complete dataset, they were able to develop a model that could discriminate all schizophrenia cases from healthy control subjects with an impressive 98.3% accuracy.

'Beam me to my meeting:' Video conferencing much improved

Posted: 29 Oct 2012 05:18 AM PDT

Forget about crackly lines or blurry webcams. Video conferencing has just got a whole lot better. By combining robotics, video and a host of other sensor and display technologies, scientists can now virtually 'beam' you to locations on the other side of the globe. It may sound like science fiction, but this new approach can make it feel like you are really 'there'.

'Curiosity' on Mars sits on rocks similar to those found in marshes in Mexico

Posted: 29 Oct 2012 05:18 AM PDT

Millions of years ago fire and water forged the gypsum rocks locked in at Cuatro Ciénegas, a Mexican valley similar to the Martian crater where NASA's Rover Curiosity roams. A team of researchers have now analysed the bacterial communities that have survived in these inhospitable springs since the beginning of life on Earth "Cuatro Ciénegas is extraordinarily similar to Mars. As well as the Gale crater where Curiosity is currently located on its exploration of the red planet, this landscape is the home to gypsum formed by fire beneath the seabed," as explained by an evolutionary ecologist.

New approach to HIV vaccine development: Tricking the immune system

Posted: 29 Oct 2012 05:18 AM PDT

Scientists are seeking to speed up the development of an HIV-vaccine through a rigorous exchange of information, methods and reagents.

Infrared vision in a cichlid fish

Posted: 29 Oct 2012 05:13 AM PDT

Biologists have discovered that the cichlid fish can see in the near infrared range; this was thought to be unlikely until now. Seeing in the infrared range is apparently helping fish to hunt in shallow African rivers.

Fruit flies bred without neurobeachin protein to facilitate study of nervous system diseases in humans

Posted: 29 Oct 2012 05:13 AM PDT

Scientists have bred fruit flies for first time without neurobeachin protein to facilitate the study of nervous system diseases in humans.

Complementary and alternative therapy improved lives of arthritis patients, study suggests

Posted: 29 Oct 2012 05:13 AM PDT

Nearly a quarter of patients with rheumatoid arthritis and osteoarthritis used complementary and alternative therapy (CAT) to help manage their condition, according to a new study.

River floods predicted using new technology

Posted: 29 Oct 2012 05:13 AM PDT

Scientists are now using high-tech solutions to provide real-time forecast of the dangers of river floods caused by climate change and human activities to help avoid disasters.

Military veterans with history of heavy alcohol use more likely to seek treatment and afterwards report better overall health than civilians

Posted: 29 Oct 2012 05:12 AM PDT

Male military veterans with a history of heavy alcohol use are more likely to seek treatment and, later, report better overall health and less depression than their civilian counterparts, according to new research.

Exercise makes middle-aged people smarter

Posted: 29 Oct 2012 05:12 AM PDT

Cognitive functions improve significantly after four months of high-intensity interval training program in middle-aged people with increased cardiovascular risk.

Easing high blood pressure without medication?

Posted: 29 Oct 2012 05:12 AM PDT

Uncontrolled high blood pressure can lead to serious health issues, including heart disease, kidney disease and stroke. Researchers are studying a new approach that could help normalize blood pressure -- without medication.

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