Sunday, June 30, 2013

Late bedtimes and less sleep may lead to weight gain in healthy adults

 
Late bedtimes and less sleep may lead to weight gain in healthy adults
A new study suggests that healthy adults with late bedtimes and chronic sleep restriction may be more susceptible to weight gain due to the increased consumption of calories during late-night hours.

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Pre-existing insomnia linked to PTSD and other mental disorders after military deployment
New research found military service members who have trouble sleeping prior to deployments may be at greater risk of developing post-traumatic stress disorder (PTSD), depression and anxiety once they return home. The study found that pre-existing insomnia symptoms conferred almost as a large of a risk for those mental disorders as combat exposure.

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Study links gene to lymphatic abnormalities
The often forgotten lymphatic circulatory system may be intimately involved in vascular disorders, according to a study by researchers.

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Biomarker predicts risk of breast cancer recurrence after tamoxifen treatment
A biomarker reflecting expression levels of two genes in tumor tissue may be able to predict which women treated for estrogen-receptor-positive breast cancer should receive a second estrogen-blocking medication after completing tamoxifen treatment.

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Divorce early in childhood affects parental relationships in adulthood
Divorce has a bigger impact on child-parent relationships if it occurs in the first few years of the child's life, according to new research. Those who experience parental divorce early in their childhood tend to have more insecure relationships with their parents as adults than those who experience divorce later, researchers say.

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Mimicking living cells: Synthesizing ribosomes
Synthetic biology researchers have for the first time synthesized ribosomes from scratch in a test tube. The researchers took an approach different from their predecessors: they mimicked the natural synthesis of a ribosome, allowing natural enzymes of a cell to help facilitate the human-made construction. The technology could lead to the discovery of new antibiotics targeting ribosome assembly and the creation of tailor-made ribosomes to produce new proteins with exotic functions.

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Survival of the Galapagos sea lion
The study shows that Galapagos sea lions (Zalophus wollebaeki) are more prone to starvation because of exposure to human influences like pets and pollution. These can impair the level of their immunity, making them less able to hunt and more likely to go hungry when food is scarce.

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Getting a good night's sleep is a nightmare for many Americans
Summer means more hours of daylight and for many, it contributes to trouble falling asleep. More than 40 million Americans suffer from chronic sleep disorders, resulting in $18 billion in cost to employers due to sleep loss issues.

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'First bionic eye' retinal chip for blind
A new bionic eye works by converting video images captured by a miniature camera, housed in the patient's glasses, into a series of small electrical pulses that are transmitted wirelessly to an array of electrodes on the surface of the retina. These pulses are intended to stimulate the retina's remaining cells resulting in the corresponding perception of patterns of light in the brain. Patients then learn to interpret these visual patterns thereby regaining some visual function.

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Saturday, June 29, 2013

FeedaMail: ScienceDaily: Most Popular News

feedamail.com ScienceDaily: Most Popular News

NASA launches satellite to study how sun's atmosphere is energized

NASA's Interface Region Imaging Spectrograph (IRIS) spacecraft launched Thursday at 7:27 p.m. PDT (10:27 p.m. EDT) from Vandenberg Air Force Base, Calif. The mission to study the solar atmosphere was placed in orbit by an Orbital Sciences Corporation Pegasus XL rocket.

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Friday, June 28, 2013

FeedaMail: ScienceDaily: Most Popular News

feedamail.com ScienceDaily: Most Popular News

Mapping out how to save species

Using colorful world maps, a new study maps out priority areas for protection to save species and preserve biodiversity. The scale is 100 times finer than previous assessments.

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Exotic alloys for potential energy applications

"Thermoelectric materials," used in wine refrigerators and spacecraft, promise to help deliver greener energy in the future.

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Gene deletion affects early language and brain white matter

A chromosomal deletion is associated with changes in the brain's white matter and delayed language acquisition in youngsters from Southeast Asia or with ancestral connections to the region, said an international consortium led by researchers at Baylor College of Medicine. However, many such children who can be described as late-talkers may overcome early speech and language difficulties as they grow.

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Ritalin shows promise in treating addiction

ADHD drug helps improve brain functional connectivity in cocaine addiction, according to a new study.

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Radiation from airport scanners: The dose we actually get is low

A new report has found that people absorb less radiation from airport X-ray backscatter scanner than they do while standing in line waiting for the scan itself.

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Helping SAD sufferers sleep soundly

Researchers report that individuals with seasonal affective disorder -- a winter depression that leads to loss of motivation and interest in daily activities -- have misconceptions about their sleep habits similar to those of insomniacs.

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Aerial mosquito spraying study finds no immediate public health risks

In what researchers say is the first public health study of the aerial mosquito spraying method to prevent West Nile virus, a new study analyzed emergency department records from Sacramento area hospitals during and immediately after aerial sprayings in the summer of 2005.

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Protein is involved with colon cancer cell's ability to invade other cells

Understanding how the protein km23-1 enables in the spread of colon cancer may lead to new treatments for the disease, according to researchers.

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Breakthrough in Internet bandwidth: New fiber optic technology could ease Internet congestion, video streaming

A team of engineers has devised a new fiber optic technology that promises to increase bandwidth dramatically.

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Prevailing view of how the brain is wired overturned?

A series of studies topples convention by showing that sensory information travels to two places at once: not only to the brain's mid-layer (where most axons lead), but also directly to its deeper layers.

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Polymer coatings a key step toward oral delivery of protein-based drugs

In a new study, a "bioadhesive" coating significantly improved the intestinal absorption into the bloodstream of nanoparticles that someday could carry protein drugs such as insulin. Such a step is necessary for drugs taken by mouth, rather than injected directly into the blood.

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Pneumonia revealed in a cough: Coughs give vital clues to the presence or absence of pneumonia in children

A new method, which analyzes the sounds in a child's cough, could soon be used in poor, remote regions to diagnose childhood pneumonia reliably. According to researchers, this simple technique of recording coughs with a microphone on the patient's bedside table, has the potential to revolutionize the management of childhood pneumonia.

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Brain cancer: A circuitous route to therapy resistance

Scientists have discovered a cause of resistance to therapy in cases of brain cancer. Microglia cells migrate into tumors and supply cancer cells with a substance needed for the repair of DNA damage. The cells thus escape programmed cell death (apoptosis). Blocking this resistance mechanism might lead to more effective treatments for malignant brain cancer.

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Could a diet high in fish and flax help prevent broken hips?

Higher levels of omega-3 fatty acids in the blood may reduce the risk for hip fractures in postmenopausal women, recent research suggests.

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Low self-control promotes selfless behavior in close relationships

When faced with the choice of sacrificing time and energy for a loved one or taking the self-centered route, people's first impulse is to think of others, according to new research.

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New maps depict impact of HIV in America

New interactive online maps that show the latest HIV prevalence data for 20 US cities by ZIP code or census tract. AIDSVu also includes new city snapshots displaying HIV prevalence alongside various social determinants of health -- such as poverty, lack of health insurance and educational attainment.

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Biochemists identify protease substrates important for bacterial growth and development

Scientists describe using a combination of biochemistry and mass spectrometry to "trap" scores of new candidate substrates of the protease ClpXP to reveal how protein degradation is critical to cell cycle progression and bacterial development. The new understanding could lead to identifying new antibiotic targets.

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Global warming may affect soil microbe survival, with unknown consequences on soil fertility and erosion

Researchers have discovered for the first time that temperature determines where key soil microbes can thrive — microbes that are critical to forming topsoil crusts in arid lands. And of concern, the scientists predict that in as little as 50 years, global warming may push some of these microbes out of their present stronghold with unknown consequences to soil fertility and erosion.

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Surgeons report melanoma recurs after 10 years in more than 6 percent of patients

Recurrence of melanoma skin cancer 10 or more years after initial treatment is more common than previously thought, occurring in more than one in 20 patients. However, according to a new study, these patients tend to live longer after their cancer returns than patients whose melanoma recurs in the first three years.

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Gas-giant exoplanets cling close to their parent stars

Gemini Observatory's Planet-Finding Campaign finds that, around many types of stars, distant gas-giant planets are rare and prefer to cling close to their parent stars. The impact on theories of planetary formation could be significant.

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Early brain stimulation may help stroke survivors recover language function

Non-invasive brain stimulation may help stroke survivors recover language function. Survivors treated with the technique regained more language function than those who did not get treatment.

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After Great Dane success, cancer doc eyes brain tumors

A success story with a 12 year old Great Dane, sets the stage for a trial in human glioblastoma of the vaccine that led to the dog's dramatic and prolonged improvement.

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Researchers reformulate the model of mitochondrial function

New findings will mean rewriting the biochemistry textbooks. The study redefines the functioning of mitochondria and explains how cells generate energy from nutrients.

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Large dead zone forming in the Gulf

Ocean experts had predicted a large "dead zone" area in the Gulf of Mexico this year, and according to the results from a researcher just back from studying the region, those predictions appear to be right on target.

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Key step in protein synthesis revealed

Scientists have trapped the ribosome, a protein-building molecular machine essential to all life, in a key transitional state that has long eluded researchers. Now, for the first time, scientists can see how the ribosome performs the precise mechanical movements needed to translate genetic code into proteins without making mistakes.

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Brain's 'garbage truck' may hold key to treating Alzheimer's and other disorders

Scientists point to a newly discovered system by which the brain removes waste as a potentially powerful new tool to treat neurological disorders like Alzheimer's disease. In fact, scientists believe that some of these conditions may arise when the system is not doing its job properly.

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A second amyloid may play a role in Alzheimer's disease

A protein secreted with insulin travels through the bloodstream and accumulates in the brains of individuals with type 2 diabetes and dementia, in the same manner as the amyloid beta (Αβ) plaques that are associated with Alzheimer's disease, a study by researchers with the UC Davis Alzheimer's Disease Center has found.

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Algae shows promise as pollution-fighter, fuel-maker

A hardy algae species is showing promise in both reducing power plant pollution and making biofuel, based on new research.

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World's food supply got a little more plentiful: Resistance gene found against ug99 wheat stem rust pathogen

Scientists have identified a gene that gives wheat plants resistance to one of the most deadly races of the wheat stem rust pathogen, called Ug99.

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A look inside children's minds

Ever wondered what's going on inside young children's brains when they're looking at things? Researchers have used optical neuroimaging for the first time on 3-and 4-year-olds to determine which areas of the brain are activated in "visual working memory."

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Type 1 diabetes: Can insulin-producing cells be regenerated?

Scientists have published new results concerning type I diabetes. Researchers have shown that in mice, the pancreas contains cells capable of being converted into insulin-producing cells, something that can be done at any age.

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'Big givers' get punished for being nonconformists

People punish generous group members by rejecting them socially -- even when the generosity benefits everyone -- because the "big givers" are nonconformists, according to a new study.

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Telomere length influences cancer cell differentiation

Researchers have discovered that forced elongation of telomeres (extensions on the end of chromosomes) promotes the differentiation of cancer cells, probably reducing malignancy, which is strongly associated with a loss of cell differentiation.

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Factory insurance would fight blight

Automakers and other private firms should be required by law to carry insurance policies to pay for tearing down their factories and buildings, recommends a hard-hitting study.

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Food contaminants worsen metabolic problems in obese mice

Certain food contaminants are suspected of triggering metabolic disorders, or of worsening them, particularly when they accompany a high-fat diet.

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Insulin differs between ethnicities, study finds

People have differing abilities to release and react to insulin depending on ethnicity, according to a new study.

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The power of imitation: Already in infancy, imitation promotes a general pro-social orientation toward others

Being mimicked increases pro-social behavior in adults, yet little is known about its social effect on children. Researchers in Germany have now investigated whether the fact of being imitated had an influence on infants' pro-social behavior and on young children's trust in another person.

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Keeping networks under control: New approach can control large complex networks, from cells to power grids

The need to ensure the proper functioning of the world's many underlying networks -- such as the Internet, power grids and global air transportation -- is increasing. But controlling networks is very difficult. A research team has developed the first broadly applicable computational approach identifying interventions that can both rescue complex networks from the brink of failure and reprogram them to a desired task. The approach to control could have a transformative impact on the complex networks field.

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Researchers unearth data in animal habitat selection that counters current convention

Scientists have long presumed that animals settle on breeding territories according to the ideal free model. But settlement data often show that, in fact, animals do not select high quality habitat. Indeed, here we report that young common loons have a striking tendency to settle on breeding lakes that resemble their natal lake in terms of both size and pH.

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Link shown between Crohn's disease and virus

A new study reveals that all children with Crohn's disease that were examined had a commonly occurring virus -- an enterovirus -- in their intestines. This link has previously not been shown for this chronic inflammatory intestinal disorder.

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Improving measurements by reducing quantum noise

The principle of interferometry is often used in high precision measurements: A beam is split in two parts, which then interfere, yielding intricat interference patterns, from which very precise data can be obtained. Usually, this is done with photons or small massive particles such as electrons or neutrons. At the Vienna University of Technology, an interferometer has now been built which instead uses Bose-Einstein-condensates, consisting of hundreds of atoms.

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Humans play role in Australia's 'angry' hot summer

Human influences through global warming are likely to have played a role in Australia's recent "angry" hot summer, the hottest in Australia's observational record, new research has found.

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River deep, mountain high: New study reveals clues to lifecycle of world's iconic mountains

Scientists have discovered the reasons behind the lifespan of some of the world's iconic mountain ranges. The study has revealed that interactions between landslides and erosion, caused by rivers, explains why some mountain ranges exceed their expected lifespan.

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No more leakage of explosive electrolytes in batteries

A research team from South Korea has found a new physical organogel electrolyte with two unique characteristics: an irreversible thermal gelation and a high value of the Li+ transference number.

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Sterilizing Mars spacecraft is largely a waste of money, two experts argue

Two university researchers say environmental restrictions have become unnecessarily restrictive and expensive -- on Mars.

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Protein in blood exerts natural anti-cancer protection

Researchers have discovered that decorin, a naturally occurring protein that circulates in the blood, acts as a potent inhibitor of tumor growth modulating the tumor microenvironment.

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Molecule drives aggressive breast cancer

Recent studies have shown a gene known to coordinate initial development of the eye (EYA1) is a powerful breast tumor promoter in mice. The gene EYA1 was also shown to be overexpressed in a genetic breast cancer subtype called luminal B.

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Chemists work to desalt the ocean for drinking water, one nanoliter at a time

By creating a small electrical field that removes salts from seawater, chemists have introduced a new method for the desalination of seawater that consumes less energy and is dramatically simpler than conventional techniques. The new method requires so little energy that it can run on a store-bought battery.

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Making hydrogenation greener: Using iron as catalyst for widely used chemical process, replacing heavy metals

Researchers have discovered a way to make the widely used chemical process of hydrogenation more environmentally friendly -- and less expensive.

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Research in fruit flies provides new insight into Barrett's esophagus

Research focused on the regulation of the adult stem cells that line the gastrointestinal tract of Drosophila suggests new models for the study of Barrett's esophagus. Barrett's esophagus is a condition in which the cells of the lower esophagus transform into stomach-like cells. In most cases this transformation has been thought to occur directly from chronic acid indigestion. A new study suggests a change in stem cell function for this transformation.

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Researchers Discover Species-Recognition System in Fruit Flies

A team of researchers has discovered a sensory system in the foreleg of the fruit fly that tells male flies whether a potential mate is from a different species. The work addresses a central problem in evolution that is poorly understood: how animals of one species know not to mate with animals of other species.

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What makes a video go viral? More than just good content

If you want your homegrown video to go viral, you'd better have more than just good content. Find someone to endorse it, the more well known the better.

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Turning off cells in habit-associated brain region prevents rats from learning to run maze on autopilot

Neuroscientists have now shown that they can prevent habits from taking root. Our daily routines can become so ingrained that we perform them automatically, such as taking the same route to work every day. Some behaviors, such as smoking or biting your fingernails, become so habitual that we can't stop even if we want to.

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Sea lampreys turning up the heat

Scientists found that male sea lampreys have a secondary sex characteristic that creates heat when they get near a female lamprey, something the females find hard to say no to.

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Social networks shape monkey 'culture' too

Of course Twitter and Facebook are all the rage, but the power of social networks didn't start just in the digital age. A new study on squirrel monkeys finds that monkeys with the strongest social networks catch on fastest to the latest in foraging crazes. They are monkey trendsters.

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Scientists discern signatures of old versus young stem cells

A chemical code scrawled on histones -- the protein husks that coat DNA in every animal or plant cell -- determines which genes in that cell are turned on and which are turned off. Now, researchers have taken a new step in the deciphering of that histone code.

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A telescope for your eye: New contact lens design may improve sight of patients with macular degeneration

Contact lenses correct eyesight but do nothing to improve blurry vision of those suffering from age-related macular degeneration (AMD), the leading cause of blindness among older adults in the western world. Now a team of researchers has created a slim, telescopic contact lens that can switch between normal and magnified vision. With refinements, the system could offer AMD patients a relatively unobtrusive way to enhance their vision.

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New system uses low-power Wi-Fi signal to track moving humans -- even behind walls

A system being developed at MIT could give all of us the ability to spot people in different rooms using low-cost Wi-Fi technology.

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How 'parrot dinosaur' switched from four feet to two as it grew

Tracking the growth of dinosaurs and how they changed as they grew is difficult. Using a combination of biomechanical analysis and bone histology, palaeontologists from Beijing, Bristol, and Bonn have shown how one of the best-known dinosaurs switched from four feet to two as it grew.

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Higher genetic risk tied to lifetime asthma suffering

Children with more genetic risks for asthma are not only more likely to develop the condition at a young age, but they are also more likely to continue to suffer with asthma into adulthood. The finding is one of the latest to come from a 40-year longitudinal study of New Zealanders.

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Fatty acids found in fish linked to lower risk of breast cancer

A high intake of fatty acids found in fish is associated with a 14 percent reduction in the risk of breast cancer in later life, a new study finds.

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Lithium reduces risk of suicide in people with mood disorders, review finds

The drug lithium is an effective treatment for reducing the risk of suicide and possibly deliberate self harm in people with mood disorders, an evidence review finds.

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Scientists discover new mechanism regulating the immune response

Scientists in Finland have discovered a new mechanism regulating the immune response that can leave a person susceptible to autoimmune diseases.

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Avengers-style Helicarrier is still pie in the sky

Physics students calculate the four-propeller powered giant aircraft seen in the Avengers would not be possible with modern technology.

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Complex activity patterns emerge from simple underlying laws, ant experiments show

A new study uses mathematical modeling and experiments on ants to show that a group is capable of developing flexible resource management strategies and characteristic responses of its own.

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Scientists turn muscular dystrophy defect on and off in cells

For the first time, scientists have identified small molecules that allow for complete control over a genetic defect responsible for the most common adult onset form of muscular dystrophy.

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A new bizarrely shaped spoon worm, Arhynchite hayaoi, from Japan

A new species of the peculiarly shaped spoon worms has been recently discovered in Japan. These animals, formally referred to as echiurans, derive their name from their elongated spoon-like projection (the proboscis), issuing from a barrel-like roundish body (the trunk). The new species, once abundant on sandy flats in the Seto Inland Sea of Japan, somehow remained undescribed because of previous misidentification with a known species.

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Beautiful but hiding unpleasant surprise: Three new species of fetid fungi from New Zealand

Scientists describe three new species of fungi from New Zealand. The new species belong to the genus Gymnopus and are mostly distinguished by their unpleasant odor typical for the subgroup of Gymnopus historically described in the genus Micromphale. The species live mostly on dead tree trunks and are seen in colonies from just a few up to hundreds of fruitbodies.

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Better antibiotics: Atomic-scale structure of ribosome with molecule that controls its motion

Scientists have created an atomic-scale structure of a bacterial ribosome attached to a molecule that controls its motion. The image is also a possible roadmap to better antibiotics. Somewhere in its twists and turns could be a weakness that a new antibiotic can target.

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Acid reflux surgery could help prevent rejection in lung transplant patients

A procedure to treat acid reflux could help prevent chronic rejection in lung transplant patients, according to a new study.

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Dendritic cell therapy improves kidney transplant survival, team finds

A single systemic dose of special immune cells prevented rejection for almost four months in a preclinical animal model of kidney transplantation, according to experts. Their findings could lay the foundation for eventual human trials of the technique.

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Specialized treatment helps cholesterol patients who suffer side effects from statins

Up to 15 percent of patients on cholesterol-lowering statin medications experience muscle pain or other side effects, and many stop taking the drugs. But a study has found that a specialized lipid clinic helps "statin-intolerant" patients control their cholesterol.

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Climate change threatens forest survival on drier, low-elevation sites

Predicted increases in temperature and drought in the coming century may make it more difficult for conifers such as ponderosa pine to regenerate after major forest fires on dry, low-elevation sites, in some cases leading to conversion of forests to grass or shrub lands, a report suggests.

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Cattle grazing and clean water are compatible on public lands, study finds

Cattle grazing and clean water can coexist on national forest lands, according to new research.

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Boat noise stops fish finding home

Boat noise disrupts orientation behavior in larval coral reef fish, according to new research. Reef fish are normally attracted by reef sound but the study, conducted in French Polynesia, found that fish are more likely to swim away from recordings of reefs when boat noise is added.

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Tiny nanocubes help scientists tell left from right

A team of scientists has developed a new, simpler way to discern molecular handedness, known as chirality, which could improve drug development, optical sensors and more.

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Is it alive or dead? How to measure the thermal signatures of single cells and assess their biological activity

To the ancients, probing the philosophical question of how to distinguish the living from the dead centered on the "mystery of the vital heat." To modern microbiology, this question was always less mysterious than it was annoying -- researchers have known that biological processes should produce thermal signatures, even within single cells, but nobody ever knew how to measure them. Now, a group of mechanical engineers in Korea have discovered a way to measure the "thermal conductivity" of three types of cells taken from human and rat tissues and placed in individual micro-wells.

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The 'gold' standard: A rapid, cheap method of detecting dengue virus

Researchers are reporting the development of an easy to use, low cost method of detecting dengue virus in mosquitoes based on gold nanoparticles. The assay is able to detect lower levels of the virus than current tests, and is easy to transport and use in remote regions.

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Time is of the essence for reducing the long-term effects of iron deficiency

Iron deficiency is a worldwide problem, especially in developing countries and among infants and pregnant women. In infancy, iron deficiency is associated with poorer cognitive, motor, and social-emotional outcomes. In a new study, researchers report on a 25-year follow-up of infants studied in Costa Rica for iron deficiency.

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Scientists view 'protein origami' to help understand, prevent certain diseases

Scientists using sophisticated imaging techniques have observed a molecular protein folding process that may help medical researchers understand and treat diseases such as Alzheimer's, Lou Gehrig's and cancer. The study verifies a process that scientists knew existed but with a mechanism they had never been able to observe, according to researchers.

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Large-scale quantum chip validated: Prototype quantum optimization chip operates as hoped

A team of scientists has verified that quantum effects are indeed at play in the first commercial quantum optimization processor.

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Microscopy technique could help computer industry develop 3-D components

A technique developed several years ago at NIST for improving optical microscopes now has been applied to monitoring the next generation of computer chip circuit components, potentially providing the semiconductor industry with a crucial tool for improving chips for the next decade or more.

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Major changes needed for coral reef survival

To prevent coral reefs around the world from dying off, deep cuts in carbon dioxide emissions are required, says a new study. Researchers find that all existing coral reefs will be engulfed in inhospitable ocean chemistry conditions by the end of the century if civilization continues along its current emissions trajectory.

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Study links cardiac hormone-related inflammatory pathway with tumor growth

A cardiac hormone signaling receptor abundantly expressed both in inflamed tissues and cancers appears to recruit stem cells that form the blood vessels needed to feed tumor growth, a new study finds.

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Are college student hook-ups linked to anxiety and depression?

As narratives of "hook-up" culture take center stage in popular media, behavioral researchers are starting to ask what psychological consequences, if any, may be in store for young adults who engage in casual sex.

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Cancer risks double when two carcinogens present at 'safe' levels, epigenetics study finds

New research has found that low doses of arsenic and estrogen -- even at levels low enough to be considered "safe" for humans if they were on their own -- can cause cancer in prostate cells.

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