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Wednesday, April 17, 2013

ScienceDaily: Top News

ScienceDaily: Top News


Differences in staging and treatment likely to be behind UK's low bowel cancer survival

Posted: 16 Apr 2013 06:47 PM PDT

Incomplete diagnostic investigation and failure to get the best treatment are the most likely reasons why survival for bowel cancer patients is lower in the UK than in other comparable countries, according to new research.

Light drinking in pregnancy not linked to development problems in childhood, study suggests

Posted: 16 Apr 2013 06:47 PM PDT

Light drinking during pregnancy is not linked to adverse behavioural or cognitive outcomes in childhood, suggests a new study.

Gene study helps understand pulmonary fibrosis

Posted: 16 Apr 2013 06:46 PM PDT

A study of the genomes of more than 1,500 patients with idiopathic pulmonary fibrosis found multiple genetic associations with the disease. One variant in a gene called TOLLIP was linked to an increase in the risk of death. This finding suggests that an abnormal immune response to infectious agents or environmental injury may be central to the disease.

Acute stress primes brain for better cognitive and mental performance

Posted: 16 Apr 2013 05:45 PM PDT

Chronic stress is known to cause major health problems, yet acute stress can be good for you. A new study shows why. Stress generates new nerve cells in the brain that, two weeks later, help you learn better. Thus, unlike chronic stress, acute stress primes the brain for improved cognitive and mental performance.

Memory, the adolescent brain and lying: The limits of neuroscientific evidence in the law

Posted: 16 Apr 2013 03:00 PM PDT

Brain scans are increasingly able to reveal whether you believe you remember some person or event in your life. In a new study, researchers used fMRI brain scans to detect whether a person recognized scenes from their own lives, as captured in some 45,000 images by digital cameras. The study is seeking to test the capabilities and limits of brain-based technology for detecting memories, a technique being considered for use in legal settings.

NASA's Wind mission encounters 'SLAMS' waves

Posted: 16 Apr 2013 03:00 PM PDT

To tease out what happens at that boundary of the magnetosphere and to better understand how radiation and energy from the sun can cross it and move closer to Earth, NASA launches spacecraft into this region to observe the changing conditions. From 1998 to 2002, NASA's Wind spacecraft traveled through this foreshock region in front of Earth 17 times, providing new information about the physics there.

Common pregnancy conditions risk future diabetes

Posted: 16 Apr 2013 03:00 PM PDT

Two common conditions in pregnancy may be risk factors for future diabetes according to a Canadian study of over one million women.

Scientists pinpoint brain's area for numeral recognition

Posted: 16 Apr 2013 03:00 PM PDT

Scientists have determined the precise anatomical coordinates of a brain "hot spot," measuring only about one-fifth of an inch across, that is preferentially activated when people view the ordinary numerals we learn early on in elementary school, like "6" or "38."

Molecular signaling in early placenta formation gives clues to causes of pregnancy complications

Posted: 16 Apr 2013 03:00 PM PDT

Understanding the molecular control of placenta formation, the organ which enables fetal growth, is critical in diagnosing and treating related pregnancy complications. Scientists have now revealed a molecular feedback loop that governs the earliest steps of placenta formation in mice, which is known to mimic placenta formation in humans.

'Survival of the fittest' now applies to computers: Surprising similarities found between genetic and computer codes

Posted: 16 Apr 2013 02:16 PM PDT

"Survival of the fittest" originally referred to natural selection in biological systems, but new research shows that this evolutionary theory also applies to technological systems.

Researchers create novel optical fibers

Posted: 16 Apr 2013 02:16 PM PDT

Researchers have found a novel way to propagate multiple beams of light in a single strand of optical fiber. The discovery could increase the amount of information fiber optic cables can carry.

Genetic markers linked to the development of lymphedema in breast cancer survivors

Posted: 16 Apr 2013 02:16 PM PDT

A new study has found a clear association between certain genes and the development of lymphedema, a painful and chronic condition that often occurs after breast cancer surgery and some other cancer treatments.

Aerobic exercise may protect cognitive abilities of heavy drinkers

Posted: 16 Apr 2013 01:18 PM PDT

Aerobic exercise may help prevent and perhaps even reverse some of the brain damage associated with heavy alcohol consumption, according to a new study.

Migraines in childhood and adolescence associated with having colic as an infant

Posted: 16 Apr 2013 01:18 PM PDT

In a study including children and adolescents six to 18 years of age, those who have experienced migraine headaches were more likely to have had colic as an infant, according to a new study.

Patients with surgical complications provide greater hospital profit-margins

Posted: 16 Apr 2013 01:18 PM PDT

Privately insured surgical patients with a complication provided hospitals with a 330 percent higher profit margin than those without a complication, report researchers. Medicare patients with a complication produced a 190 percent higher margin. For hospitals, reducing surgical complications may mean reduced financial performance.

Routine EKG finding could signal serious heart problem

Posted: 16 Apr 2013 01:18 PM PDT

A common test that records the heart's electrical activity could predict potentially serious cardiovascular illness, according to a new study.

Parents can help their children avoid alcohol pitfalls during transition from high school to college

Posted: 16 Apr 2013 01:18 PM PDT

The transition from high school to college is a particularly vulnerable time for alcohol experimentation. A new study looks at which student characteristics may enhance parent-based interventions. Results indicate that teens who perceive their friends as more approving of alcohol consumption also seem to be more influenced by communication with their parents about drinking.

Plasma device could revolutionize energy generation and storage

Posted: 16 Apr 2013 12:19 PM PDT

Engineers have developed a method of creating and controlling plasma that could revolutionize American energy generation and storage.

Small in size, big on power: New microbatteries the most powerful yet

Posted: 16 Apr 2013 12:19 PM PDT

The most powerful batteries on the planet are only a few millimeters in size, yet they pack such a punch that a driver could use a cellphone powered by these batteries to jump-start a dead car battery -- and then recharge the phone in the blink of an eye. The new microbatteries out-power even the best supercapacitors and could drive new applications in radio communications and compact electronics.

Strange new bursts of gamma rays point to a new way to destroy a star

Posted: 16 Apr 2013 11:47 AM PDT

Scientists have pinpointed a new type of exceptionally powerful and long-lived cosmic explosion, prompting a theory that they arise in the violent death throes of a supergiant star.

Promising results in treating a lymphoma in young people

Posted: 16 Apr 2013 11:46 AM PDT

Patients with a type of cancer known as primary mediastinal B-cell lymphoma who received infusions of chemotherapy, but who did not have radiation therapy to an area of the thorax known as the mediastinum, had excellent outcomes, according to clinical trial results. Until now, most standard treatment approaches for patients with this type of lymphoma have included radiation therapy to the mediastinum. However, mediastinal radiation is associated with substantial long-term toxic side effects.

Scientists discover new materials to capture methane

Posted: 16 Apr 2013 10:28 AM PDT

Scientists have discovered new materials to capture methane, the second highest concentration greenhouse gas emitted into the atmosphere.

Methods to repair kidney cells, assess kidney function on the horizon

Posted: 16 Apr 2013 09:17 AM PDT

Researchers may have found a way to block kidney-destroying inflammation and help damaged kidney cells recover. In a related study, they report progress on a non-invasive method to assess how much kidney function has survived a serious bout of inflammation or a chronic problem like high blood pressure.

Love at first sniff: Male moths go by first impressions

Posted: 16 Apr 2013 09:17 AM PDT

Entomologists now have an explanation for why we see so many hybrid moths in nature. The team closely examined the behavior and the olfactory circuitry of male moths and found an answer in female-produced pheromones.

Survived cancer? Now look out for cardiovascular risks

Posted: 16 Apr 2013 09:17 AM PDT

New research finds that CVD risk factors may be overlooked during survivorship care.

Building a better capacitor with custom nanorods

Posted: 16 Apr 2013 09:17 AM PDT

A new process for growing forests of manganese dioxide nanorods may lead to the next generation of high-performance capacitors.

Layered '2-D nanocrystals' promising new semiconductor

Posted: 16 Apr 2013 08:44 AM PDT

Researchers are developing a new type of semiconductor technology for future computers and electronics based on "two-dimensional nanocrystals" layered in sheets less than a nanometer thick that could replace today's transistors.

Catch me if you can: Two new species of moth from the Russian Far East

Posted: 16 Apr 2013 08:44 AM PDT

Showing a range of peculiar habits and difficult to be discovered and collected, Ypsolophid moths present an exciting catch for scientists. Russian entomologists have discovered and described two species of these engaging moths, coming from the southernmost areas of the Russian Far East.

Researchers devise X-ray approach to track surgical devices, minimize radiation exposure

Posted: 16 Apr 2013 08:44 AM PDT

Researchers have developed a new tool to help surgeons use X-rays to track devices used in "minimally invasive" surgical procedures while also limiting the patient's exposure to radiation from the X-rays.

New material gets itself into shape

Posted: 16 Apr 2013 08:43 AM PDT

Inspired by plant components that respond to external stimuli, material scientists have devised a new method for producing composite materials from a variety of materials that adopt a pre-programmed shape autonomously.

Better skin grafting: Inspired by spiny-headed worms, scientists invent microneedle adhesive stronger than surgical staples

Posted: 16 Apr 2013 08:43 AM PDT

A parasitic worm may hold the answer to keeping skin grafts firmly in place over wounds.

For the very first time, two spacecraft will fly in formation with millimeter precision

Posted: 16 Apr 2013 08:42 AM PDT

A new project aims to demonstrate that two satellites can move as one single object with sub-millimeter precision. This configuration will enable the creation of enormous space telescopes with the lens and detector hundreds of meters apart.

Cheaper natural gas-powered cars on the horizon?

Posted: 16 Apr 2013 08:41 AM PDT

When it comes to American consumers' vehicular preferences, a chemist says the choice often boils down to simple economics more so than availability, environment or altruism.

Powerpot turns heat and water into electricity

Posted: 16 Apr 2013 08:41 AM PDT

Students have invented a portable cook pot that doubles as a thermoelectric generator, and are now marketing it.

A quarter of patients discharged from hospitals return to ERs within 30 days

Posted: 16 Apr 2013 07:23 AM PDT

Nearly one quarter of patients may return to the emergency department within 30 days of being discharged from a hospitalization, according to researchers.

Mammogram tool improves some breast cancer detection but also increases false alarms

Posted: 16 Apr 2013 07:23 AM PDT

A costly and widely used mammography add-on increases detection of noninvasive and early-stage invasive breast cancer but also makes more mistakes than mammography alone, researchers have found.

Lack of consensus among health care providers in identifying sepsis poses threat to treatment

Posted: 16 Apr 2013 07:23 AM PDT

Though the toll of sepsis is known to be enormous -- costing the US health care system $24.3 billion each year, and is the nation's third-leading killer -- the true magnitude of incidence of and death from the illness remains unknown. There is substantial variability in these numbers, depending on the method used to identify the condition in patients treated at hospital across the United States, according to a new study.

Biodiversity crisis: The impacts of socio-economic pressures on natural floras and faunas

Posted: 16 Apr 2013 07:23 AM PDT

A new study on extinction risk has shown that proportions of plant and animal species being classified as threatened on national Red Lists are more closely related to socioeconomic pressure levels from the beginning than from the end of the 20th century.

Anxious about life and afraid of death? Tylenol may do the trick, study suggests

Posted: 16 Apr 2013 07:23 AM PDT

Researchers have found a new potential use for the over-the-counter pain drug Tylenol. Typically known to relieve physical pain, the study suggests the drug may also reduce the psychological effects of fear and anxiety over the human condition, or existential dread.

Impact of portion size on overeating is hard to overcome

Posted: 16 Apr 2013 07:23 AM PDT

People given large servings of food eat more than those given smaller servings, even after they have been taught about the impact of portion size on consumption, research shows. Learning how to engage in mindful -- rather than mindless -- eating also did not decrease food intake by a significant amount in those given large servings. The study highlights the need to find new ways to reduce the effect of portion size.

Dramatic changes in bacteria following male circumcision

Posted: 16 Apr 2013 07:23 AM PDT

Male circumcision reduces the abundance of bacteria living on the penis and might help explain why circumcision offers men some protection against HIV, according to a new study.

Paper-thin skin patch collects vitals: E-health made easier and more comfortable

Posted: 16 Apr 2013 07:22 AM PDT

The future of health care could be found in a tiny, paper-thin skin patch that collects vital information. The Bio-patch sensor is inexpensive, versatile and, best of all, comfortable to wear.

Neighbors move electrons jointly: Ultrafast collective electron transfer after excitation of single electron

Posted: 16 Apr 2013 07:22 AM PDT

Applying femtosecond x-ray methods, researchers have observed an extremely fast, collective electron transfer of ~100 molecular ions after excitation of a single electron in a crystal of transition metal complexes.

Transcription factors regulating blood oxygen linked to melanoma metastases

Posted: 16 Apr 2013 07:21 AM PDT

Researchers have discovered that transcription factors regulating the levels of oxygen in the blood also play a role in the spread of the skin cancer melanoma.

College admission questions rarely identify criminal behavior

Posted: 16 Apr 2013 05:54 AM PDT

A new study shows that neither criminal background checks nor pre-admission screening questions accurately predict students likely to commit crime on college campuses.

Haiti cholera mutations could lead to more severe disease

Posted: 16 Apr 2013 05:54 AM PDT

The cholera strain that transferred to Haiti in 2010 has multiple toxin gene mutations that may account for the severity of disease and is evolving to be more like an 1800s version of cholera.

Tobacco companies keep people smoking despite UK cigarette tax increases

Posted: 16 Apr 2013 05:54 AM PDT

The tobacco industry keeps the price of its cheapest cigarettes virtually static despite annual increases in tobacco taxes, circumventing the United Kingdom's public health policy to reduce smoking through higher prices.

Women with HIV shown to have elevated resting energy expenditure

Posted: 16 Apr 2013 05:53 AM PDT

Studies have shown that about 10 percent of men infected with human immunodeficiency virus (HIV) have an elevated resting energy expenditure (REE). Their bodies use more kilocalories for basic functions including circulation, body temperature, and breathing. Most studies have been conducted in men and those with solely women have had small sample sizes.

Scientists transform cellulose into starch: Potential food source derived from non-food plants

Posted: 16 Apr 2013 05:53 AM PDT

A team of researchers has succeeded in transforming cellulose into starch, a process that has the potential to provide a previously untapped nutrient source from plants not traditionally though of as food crops.

Language instruction improved with fun and games

Posted: 16 Apr 2013 05:53 AM PDT

Playing simple games using words and pictures can help people to learn a new language with greater ease, researchers have shown.

Resurgence of endangered deer in Patagonian ‘Eden’ highlights conservation success

Posted: 16 Apr 2013 05:51 AM PDT

The Huemul, a species of deer found only in the Latin American region of Patagonia, is bouncing back from the brink of possible extinction.

Escalating cost of forest conservation

Posted: 16 Apr 2013 05:51 AM PDT

In the face of unprecedented deforestation and biodiversity loss, policy makers are increasingly using financial incentives to encourage conservation.

Forage longer for berries, study on age-related memory decline suggests

Posted: 16 Apr 2013 05:51 AM PDT

Like birds which stop foraging too early on a berry-laden bush, a new study suggests older people struggle to recall items because they flit too often between 'patches' in their memories.

Stimulating the brain blunts cigarette craving

Posted: 16 Apr 2013 05:51 AM PDT

Cigarette smoking is the leading cause of preventable deaths globally. Unfortunately smoking cessation is difficult, with more than 90% of attempts to quit resulting in relapse.

A look at the world explains 90 percent of changes in vegetation

Posted: 16 Apr 2013 05:51 AM PDT

In the last thirty years, vegetation has changed significantly the world over. Until recently, the extent to which the climate or humankind was responsible remained unclear. However, geographers now reveal that over half of these changes are climatological, humans or as yet unknown human-climate interactions cause about a third and around ten percent cannot be explained fully by either the climate or human activity.

Molecular rings mystery solved after 20 years

Posted: 16 Apr 2013 05:51 AM PDT

Although the double benzene molecule tried to reveal its structure in experiments in 1993, chemists at the time were unable to find an explanation for the spectral peaks they saw. Now, 20 years later, theoretical chemists have come up with a theory.

Lower education linked to premature death from malignant melanoma

Posted: 16 Apr 2013 05:51 AM PDT

There are socioeconomic differences in Sweden in survival amongst people with malignant skin melanoma, according to a new study. Melanoma patients with a lower educational background are much more likely to die of the disease.

No evidence that digoxin increases mortality as treatment for atrial fibrillation

Posted: 16 Apr 2013 05:49 AM PDT

A new finding contradicts a recent study in the same publication; suggests evidence is lacking that digoxin increases mortality as a treatment for atrial fibrillation.

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