This release is available in German. VIDEO: Red-colored adenovirus particles are found in the periphery of a human epithelial cell and steadily move towards the cell nucleus at the bottom of the image. The endocytic vesicles in... Click here for more information. Mucosal epithelia do not have any receptors on the outer membrane for the absorption of viruses like hepatitis C, herpes, ...

When competing for food and resources, bacteria employ elaborate strategies to keep rival cells at bay. Scientists have now identified a pathway that allows disease-causing bacteria to attack other bacterial cells by breaking down their cell wall. Pseudomonas aeruginosa is a type of bacteria readily found in everyday environments. It easily forms colonies in a wide variety of settings, including medical devices, body organs and skin wounds. This allows it to cause disease and act as a major pathogen, particularly in hospitals. Research led by Joseph Mougous, assistant ...

While more Americans are working past age 65 by choice, a growing segment of the population must continue to work well into their sixties out of financial necessity. Research conducted by the Columbia University's Mailman School of Public Health and the University of Miami Miller School of Medicine looked at aging, social class and labor force participation rates to illustrate the challenges that lower income workers face in the global marketplace. The study used the burden of arthritis to examine these connections because 49 million U.S. adults have arthritis, and 21 ...

TORONTO, Ont., July 21, 2011—Chronic pain is not managed well in the general population and it's an even greater challenge for homeless people, according to new research by St. Michael's Hospital. Twenty-five per cent of Canadians say they have continuous or intermittent chronic pain lasting six months or more. The number is likely to be even higher among homeless people, in part due to frequent injuries. Of the 152 residents of homeless shelters with chronic pain studied by Dr. Stephen Hwang, more than one-third (37 per cent) had Chronic Pain Grade IV, the highest ...

This release is available in German. Nanotechnology has developed tremendously in the past decade and was able to create many new materials with a vast range of potential applications. Carbon nanotubes are an example of these new materials and consist of cylindrical molecules of carbon with diameters of a few nanometers – one nanometer is one millionth of a millimeter. Carbon nanotubes possess exceptional electronic, mechanical and chemical properties, for example they can be used to clean polluted water. Scientists of the University of Vienna had recently published ...

This release is available in Spanish. Each community of soil microbes has a unique fingerprint that can potentially be used to track soil back to its source, right down to whether it came from dust from a rural road or from a farm field, according to a U.S. Department of Agriculture (USDA) soil scientist. Ann Kennedy, at the Agricultural Research Service (ARS) Land Management and Water Conservation Research Unit in Pullman, Wash., studies the biological properties of soils that affect wind erosion. She analyses the soil for the fatty acid or lipid content from the community ...

CHAMPAIGN, Ill. — Subsidizing the wages of caregivers at group homes would likely reduce worker turnover rates and help contain costs at long-term care facilities, according to new University of Illinois research. Elizabeth T. Powers, a professor of economics and faculty member of the Institute of Government and Public Affairs at Illinois, says that a government-sponsored wage-subsidy program could reduce the churn of low-wage caregivers through group homes by one-third. "High rates of worker turnover have costs, and there aren't a lot incentives for the agencies that ...

CHAMPAIGN, Ill. — Social safety net programs that reduce psychosocial stressors for low-income families also ultimately lead to a reduction in childhood obesity, according to research by a University of Illinois economist who studies the efficacy of food assistance programs on public health. Craig Gundersen, a professor of agricultural and consumer economics at Illinois, says food and exercise alone are not to blame for the extent of obesity among children in the United States. Psychosocial factors, such as stressors brought about by uncertainty about the economy, income ...

CHAMPAIGN, Ill. — Reforms aimed at curbing executive compensation will likely have little effect on reducing systemic risk in the financial system, and they may even have unintended consequences for the freedom to contract, according to a University of Illinois expert in business law and corporate finance. In a paper published in the Ohio State Entrepreneurial Business Law Journal, law professor Christine Hurt argues that giving regulators unprecedented power to prohibit certain types of private compensation under the guise of minimizing systemic risk in the financial ...

CHAMPAIGN, Ill. — Regulatory hurdles abound for the successful commercialization of emerging liquid biofuels, which hold the promise of enhancing U.S. energy security, reducing greenhouse gas emissions and serving as a driver for rural economic development, according to new U. of I. research. In the study, University of Illinois law professor Jay P. Kesan and Timothy A. Slating, a regulatory associate with the University of Illinois Energy Biosciences Institute, argue that regulatory innovations are needed to keep pace with technological innovations in the biofuels industry. "Getting ...

Most of our society's wealth is invested in businesses or other ventures that may or may not pan out. Thus, chance plays a role in where the wealth of a society will end up. But does chance favor the concentration of wealth in the hands of a few, or does it tend to level the playing field? Three University of Minnesota researchers have built a simplified model that isolates the effects of chance and found that it consistently pushes wealth into the hands of a few, ever-richer people. The study, "Entrepreneurs, chance, and the deterministic concentration of wealth," ...

Two tropical storms are now in the open waters of the North Atlantic: Bret and Cindy. Both were captured on one image from NASA today. Both storms are hundreds of miles to the east-northeast of Bermuda and pose no threat to land areas. NASA's GOES Project issued an infrared image of both Bret and Cindy today from the GOES-13 satellite, which is operated by NOAA. The NASA GOES Project is housed at NASA's Goddard Space Flight Center in Greenbelt, Md. and uses GOES-13 data from NOAA to create images and animations. The image was captured at 0845 UTC (4:45 a.m. EDT) and shows ...

CAMBRIDGE, Mass. -- As workers continue to grapple with the damaged Fukushima Daiichi nuclear powerplant in Japan, the crisis has shone a spotlight on nuclear reactors around the world. In June, The Associated Press released results from a yearlong investigation, revealing evidence of "unrelenting wear" in many of the oldest-running facilities in the United States. That study found that three-quarters of the country's nuclear reactor sites have leaked radioactive tritium from buried piping that transports water to cool reactor vessels, often contaminating groundwater. ...

In pure numerical terms, anesthesia-associated mortality has risen again. The reasons for this are the disproportionate increase in the numbers of older and multimorbid patients and surgical procedures that would have been unthinkable in the past. This is the result of a selective literature review of André Gottschalk's working group at the Bochum University Hospital in the current issue of Deutsches Ärzteblatt International (Dtsch Arztebl Int 2011; 108[27]: 469-74). In the 1940s, anesthesia-related mortality was 6.4/10,000. By introducing safety standards such as pulse ...

MADISON, WI, JULY 21, 2011 -- Surface water quality is important for the proper function of aquatic ecosystems, as well as human needs and recreation. Pasturelands have been found to be major sources of sediment, phosphorus and pathogens in Midwest surface water resources. While poor grazing management may lead to contaminated surface water, little is known about the specific amount of pollution in pasture streams that can be attributed to grazing cattle. Scientists in the Departments of Animal Science, Veterinary Diagnostic and Production Animal Medicine, and Veterinary ...

A new study published in the American Journal of Transplantation reveals that since the elimination of the kidney allocation priority for matching for HLA-B on May 7, 2003, access to kidney transplantation for minorities has been improved. Improvement is a result of a policy that reduced the requirements for tissue matching. Prior national kidney allocation rules provided priority to candidates who shared HLA-B antigens with potential deceased donors. On May 7, 2003, allocation priority for HLA-B matching was eliminated. Improvements in medications used to prevent transplant ...

Modified metals that change colour in the presence of particular gases could warn consumers if packaged food has been exposed to air or if there's a carbon monoxide leak at home. This finding could potentially influence the production of both industrial and commercial air quality sensors. "We initially found out by accident that modified rhodium reacts in a colourful way to different gases," says Cathleen Crudden, a professor in the Department of Chemistry. "That happy accident has become a driving force in our work with rhodium." Rhodium that is modified using carbon, ...

Irvine, Calif., July 21, 2011 – For 150 years scientists have been trying to explain convergent evolution. One of the best-known examples of this is how poisonous butterflies from different species evolve to mimic each other's color patterns – in effect joining forces to warn predators, "Don't eat us," while spreading the cost of this lesson. Now an international team of researchers led by Robert Reed, UC Irvine assistant professor of ecology & evolutionary biology, has solved part of the mystery by identifying a single gene called optix responsible for red wing color ...

A new supplemental issue of The Gerontologist urges aging researchers to include representative samples of ethnically diverse populations in their work. The publication also identifies research priorities for moving the science of recruitment and retention forward, in addition to providing several strategies that scholars can employ in their work. The U.S. Census Bureau predicts that non-white minorities will make up 42 percent of the country's 65-and-over population by 2050. "The cultural-historical background and sociopolitical conditions of each diverse group poses ...

VIDEO: In this animation, stunning aurorae ripple around a "hot Jupiter. " When a stellar eruption known as a coronal mass ejection hit the planet, it triggered these aurorae, which are the... Click here for more information. Earth's aurorae, or Northern and Southern Lights, provide a dazzling light show to people living in the polar regions. Shimmering curtains of green and red undulate across the sky like a living thing. New research shows that aurorae on ...

An invasive insect, hemlock woolly adelgid, has been marching north along the Appalachians, killing almost every hemlock tree in its path. The adelgid has devastated forests in Georgia, Tennessee, and Virginia. The pest recently arrived in Vermont and other parts of New England. So far, only extreme cold stops the adelgid. But now a University of Vermont scientist has developed what he calls a "fungal microfactory" technology that promises to give forest managers and homeowners a tool to fight back. Working with the U.S. Forest Service, the State of Vermont, and others, ...

Sexual transmission of hepatitis C virus (HCV) is considered rare. But a new study by researchers at Mount Sinai School of Medicine, working with the Centers for Disease Control and Prevention (CDC), provides substantial evidence that men with HIV who have sex with other men (MSM) are at increased risk for contracting HCV through sex. The results of the study are published in today's edition of the CDC's Morbidity and Mortality Weekly Report. HCV transmission primarily occurs through exposure to blood, and persons who inject drugs at greatest risk. But when Mount Sinai ...

In a study published online this month in the Journal of Heredity, NOAA researchers and others, using DNA testing to fill in a missing link in the lives of killer whales that seasonally visit Washington's Puget Sound, have discovered that some of the progeny they studied were the result of matings within the same social subgroups, or pods, that are part of the overall population. One implication of this inbreeding behavior is a significant reduction in the genetic diversity of what is already a perilously small population of animals, formally known as Southern Resident ...

Chicago, IL—Infection control researchers investigating a rare bacterial outbreak of Burholderia cepacia complex (Bcc) identified contaminated nasal spray as the root cause of the infections, leading to a national recall of the product. An article in the August issue of Infection Control and Hospital Epidemiology, the journal of the Society for Healthcare Epidemiology of America (SHEA), describes how researchers were able to trace the outbreak back to the nasal decongestant spray. Bcc is a group of Gram-negative bacteria that can cause hard-to-treat infections. Patients ...

Chicago, IL (July 21, 2011)—A study in the August issue of Infection Control and Hospital Epidemiology, the journal of the Society for Healthcare Epidemiology of America (SHEA), suggests that documentation of hepatitis B vaccination for health care students may fall short of current recommendations. Researchers led by Dr. Rania Tohme of the Centers for Disease Control and Prevention (CDC) analyzed hepatitis B immunization records of 4,075 health care students who matriculated at a university in the southeastern U.S. between January 2000 and January 2010. The study found ...