Wednesday, August 14, 2013

FeedaMail: ScienceDaily: Most Popular News

feedamail.com ScienceDaily: Most Popular News

New compound prevents first steps of fungal infection

A team of researchers has discovered a chemical compound that prevents fungal cells from adhering to surfaces.

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Computer model predicts red blood cell flow

Researchers have now created the first simplified computer model of the process that forms the Fåhræus-Lindqvist layer in our blood -- a model that could help to improve the design of artificial platelets and medical treatments for trauma injuries and for blood disorders such as sickle cell anemia and malaria.

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Children with allergy, asthma may be at higher risk for ADHD

Researchers have found that there is an increased risk of ADHD in boys that have a history of allergy or asthma. The study also found an even stronger risk associated with milk intolerance.

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Meal timing can significantly improve fertility in women with polycystic ovaries

A common disorder that impairs fertility by producing an overabundance of insulin may be naturally treatable through meal timing. Research indicates that an increased caloric intake at breakfast can lead to lower levels of testosterone and a dramatic increase in ovulation frequency.

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Crowdsourcing weather using smartphone batteries

A group of smartphone app developers and weather experts have developed a way to use the temperature sensors built into smartphone batteries to crowdsource weather information. These tiny thermometers usually prevent smartphones from dangerously overheating, but the researchers discovered the battery temperatures tell a story about the environment around them.

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Light slowed to a crawl in liquid crystal matrix

Light traveling in a vacuum is the Universe's ultimate speed demon, racing along at approximately 300,000 kilometers/second. Now scientists have found an effective new way to put a speed bump in light's path. Researchers have embedded dye molecules in a liquid crystal matrix to throttle the group velocity of light back to less than one billionth of its top speed.

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Shortening tails gave early birds a leg up

A radical shortening of their bony tails over 100 million years ago enabled the earliest birds to develop versatile legs that gave them an evolutionary edge, a new study shows.

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Ancient mammal relatives cast light on recovery after mass extinction

Much work so far suggests that the survivors of mass extinctions often are presented with new ecological opportunities because the loss of many species in their communities allows them to evolve new lifestyles and new anatomical features as they fill the roles vacated by the victims. However, it turns out that not all survivors respond in the same way, and some may not be able to exploit fully the new opportunities arising after a mass extinction.

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Brain scans may help diagnose dyslexia

A new study shows that differences in a key language structure can be seen even before children start learning to read.

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Toxicologist says NAS panel 'misled the world' when adopting radiation exposure guidelines

A toxicologist describes how regulators came to adopt the linear no threshold (LNT) dose-response approach to ionizing radiation exposure in the 1950s, which was later generalized to chemical carcinogen risk assessment. He also offers further evidence to support his earlier assertions that two geneticists deliberately suppressed evidence to prevent the U.S. National Academy of Sciences from considering an alternative, threshold model, for which there was experimental support.

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Cost of sustainable red light camera programs? Shortening yellow lights and increasing speed limits results in more crashes

Scientists have analyzed traffic control measures intended to boost red light revenue -- such as shortening yellow light time or increasing the speed limit on a street -- to determine if they compromise safety.

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Super-fast quantum computers? Scientists find asymmetry in topological insulators

New research shows that a class of materials being eyed for the next generation of computers behaves asymmetrically at the sub-atomic level. This research is a key step toward understanding the topological insulators that may have the potential to be the building blocks of a super-fast quantum computer that could run on almost no electricity.

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Anthropologists study testosterone spikes in non-competitive activities

The everyday physical activities of an isolated group of forager-farmers in central Bolivia are providing valuable information about how industrialization and its associated modern amenities may impact health and wellness.

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New culprit that may make aging brains susceptible to neurodegenerative diseases identified

The steady accumulation of a protein in healthy, aging brains may explain seniors' vulnerability to neurodegenerative disorders, a new study reports.

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Extinctions of large animals sever the Earth's 'nutrient arteries'

A new study has demonstrated that large animals have acted as carriers of key nutrients to plants and animals over thousands of years and on continental scales.

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Breaking up the superbugs' party

The fight against antibiotic-resistant superbugs has taken a step forward thanks to a new discovery by scientists.

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More accurate multiple sclerosis diagnostics possible

A group of proteins could play a role in helping multiple sclerosis patients get more accurate diagnostics about the severity and progress of their disease.

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Heat waves increase incidence of infectious gastroenteritis and IBD flares

Swiss researchers report an increase risk of inflammatory bowel disease relapse in patients during heat wave periods. The study also found an increase of infectious gastroenteritis during heat waves, with the strongest impact following a 7 day lag time after the heat wave.

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New strategy to disarm the dengue virus brings new hope for a universal dengue vaccine

A new strategy that cripples the ability of the dengue virus to escape the host immune system has been discovered. This breakthrough strategy opens a door of hope to what may become the world's first universal dengue vaccine candidate that can give full protection from all four serotypes of the dreadful virus.

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MRSA strain in humans originally came from cattle

A strain of bacteria that causes skin and soft tissue infections in humans originally came from cattle, according to a new study. The researchers who conducted the genetic analysis of strains of Staphylococcus aureus known as CC97 say these strains developed resistance to methicillin after they crossed over into humans around forty years ago.

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More siblings means less chance of divorce as adult

Growing up with siblings may provide some protection against divorce as an adult, a new nationwide study reveals.

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Virus-derived particles target blood cancer

Researchers have developed unique virus-derived particles that can kill human blood cancer cells in the laboratory and eradicate the disease in mice with few side effects.

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Study challenges popular perception of new 'hookup culture' on college campuses

A new study challenges the popular perception that there is a "new and pervasive hookup culture" among contemporary college students.

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Love and work don't always work for working class in America, study shows

The decline and disappearance of stable, unionized full-time jobs with health insurance and pensions for people who lack a college degree has had profound effects on working-class Americans who now are less likely to get married, stay married, and have their children within marriage than those with college degrees, a new study has found.

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Early surgery better than watchful waiting for patients with severe mitral valve regurgitation

Patients with severe mitral valve regurgitation who are otherwise healthy should have mitral valve repair surgery sooner rather than later, even if they feel no symptoms. The results challenge the long-held belief that it is safer to "watch and wait" until a patient has symptoms, such as shortness of breath.

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Burmese long-tailed macaques use of stone tools is being threatened by human activity in Thailand

The Burmese long-tailed macaques' use of stone tools is being threatened by human activity in Thailand.

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Low-grade prostate cancers may not become aggressive with time -- adds support for 'watch and wait' approach

Prostate cancer aggressiveness may be established when the tumor is formed and not alter with time, according to a new study published.

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Plastic solar cells' new design promises bright future

Harvesting energy directly from sunlight to generate electricity using photovoltaic technologies is a very promising method for producing electricity in an environmentally benign fashion. Polymer solar cells offer unique attractions, but the challenge has been improving their power-conversion efficiency. Now a research team reports the design and synthesis of new polymer semiconductors and reports polymer solar cells with fill factors of 80 percent -- a first. This number is close to that of silicon solar cells.

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Digital streak camera captures full-color photographs of high-speed objects

Researchers have developed a new design for a digital streak camera that captures full-color images of projectiles traveling up to 10 times the speed of sound. This system was designed to replace the outdated film-based streak cameras that are still in use at high-speed test tracks.

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Advancing resistive memory to improve portable electronics

Scientists have developed a novel way to build what many see as the next generation memory storage devices for portable electronic devices including smart phones, tablets, laptops and digital cameras.

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First documented report of swimming and diving in apes

Two researchers have provided the first video-based observation of swimming and diving apes. Instead of the usual dog-paddle stroke used by most terrestrial mammals, these animals use a kind of breaststroke. The swimming strokes peculiar to humans and apes might be the result of an earlier adaptation to an arboreal life.

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Children of obese mothers at greater risk of early heart death as adults

Children of obese and overweight women have a higher risk of early cardiovascular death as adults, finds a new study.

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How bacteria found in mouth may cause colorectal cancer

Gut microbes have recently been linked to colorectal cancer, but it has not been clear whether and how they might cause tumors to form in the first place. Two studies reveal how gut microbes known as fusobacteria, which are found in the mouth, stimulate bad immune responses and turn on cancer growth genes to generate colorectal tumors. The findings could lead to more effective strategies for the early diagnosis, prevention, and treatment of colorectal cancer.

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A genetic answer to the Alzheimer's riddle?

What if we could pinpoint a hereditary cause for Alzheimer's, and intervene to reduce the risk of the disease? We may be closer to that goal, thanks to new work in Alzheimer's genetics.

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Visualized heartbeat can trigger 'out-of-body experience'

A visual projection of human heartbeats can be used to generate an "out-of-body experience," according to new research. The findings could inform new kinds of treatment for people with self-perception disorders, including anorexia.

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A magnetar at the heart of our Milky Way

Astronomers have discovered a magnetar at the centre of our Milky Way. This pulsar has an extremely strong magnetic field and enables researchers to investigate the direct vicinity of the black hole at the heart of the galaxy. Scientists have, for the first time, measured the strength of the magnetic field around this central source and were able to show that the latter is fed by magnetic fields. These control the inflow of mass into the black hole, also explaining the x-ray emissions of this gravity trap.

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Extreme weather events fuel climate change

In 2003, Central and Southern Europe sweltered in a heatwave that set alarm bells ringing for researchers. It was one of the first large-scale extreme weather events which scientists were able to use to document in detail how heat and drought affected the carbon cycle (the exchange of carbon dioxide between the terrestrial ecosystems and the atmosphere). Measurements indicated that the extreme weather events had a much greater impact on the carbon balance than had previously been assumed. It is possible that droughts, heat waves and storms weaken the buffer effect exerted by terrestrial ecosystems on the climate system. In the past 50 years, plants and the soil have absorbed up to 30% of the carbon dioxide that humans have set free, primarily from fossil fuels.

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Targeting aggressive prostate cancer: How non-coding RNAs fuel cancer growth

Researchers have identified a key mechanism behind aggressive prostate cancer that spurs tumor growth and metastasis and makes cancers resistant to treatment.

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Earth orbit changes key to Antarctic warming that ended last ice age

New research from an ice core taken from West Antarctica shows that the warming that ended the last ice age in Antarctica began at least two, and perhaps four, millennia earlier than previously thought.

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Preschoolers inability to estimate quantity relates to later math difficulty

Preschool children who showed less ability to estimate the number of objects in a group were 2.4 times more likely to have a later mathematical learning disability than other young people, according to psychologists.

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Teleported by electronic circuit: Physicists 'beam' information

Researchers cannot "beam" humans or objects through space yet, a feat sometimes alluded to in science fiction movies. They managed, however, to teleport information from A to B -- for the first time in an electronic circuit.

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Cancer's origins revealed: Genetic imprints and signatures left by DNA-damaging processes that lead to cancer identified

Scientists have provided the first comprehensive genomic map of mutational processes that drive tumour development. Together, these mutational processes explain the majority of mutations found in 30 of the most common cancer types.

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