This press release is available in German. Optical atomic clocks measure time with unprecedented accuracy. However, it is the ability to compare clocks with one another that makes them applicable for high-precision tests in fundamental theory, from cosmology all the way to quantum physics. A clock comparison, i.e. a comparison of their optical frequencies, proved to be challenging so far as the few existing optical clocks around the world are not readily portable due to their complex nature. A team of researchers from the Physikalisch-TechnischeBundesanstalt (PTB) in ...

This press release is available in German. Leipzig/Dresden/Freiburg. In recent years the economic value of pollination-dependent crops has substantially increased around the world. As a team of researchers from the Helmholtz Centre for Environmental Research (UFZ), the Technical University of Dresden and the University of Freiburg headed by the UFZ wrote in an article entitled "Spatial and temporal trends of global pollination benefit" in the open-access journal PLoS ONE the value of ecological pollination services was around 200 billion US dollars in 1993 and rose ...

Medical researchers at the University of Sheffield have defined the structure of a key part of the human obesity receptor- an essential factor in the regulation of body fat- which could help provide new treatments for the complications of obesity and anorexia. This major advance in research, published in the journal Structure, will greatly enhance the ability to generate drugs which can both block and stimulate the receptor for the obesity hormone leptin. This could have life-changing effects on people suffering from the complications of obesity and malnutrition. Researchers ...

The fungal infection that killed a record number of amphibians worldwide leads to deadly dehydration in frogs in the wild, according to results of a new study. High levels of an aquatic, chytrid fungus called Batrachochytrium dendrobatidis (Bd) disrupt fluid and electrolyte balance in wild frogs, the scientists say, severely depleting the frogs' sodium and potassium levels and causing cardiac arrest and death. Their findings confirm what researchers have seen in carefully controlled lab experiments with the fungus, but San Francisco State University biologist Vance ...

Using nature's beauty as a tourist draw can boost conservation in China's valued panda preserves, but it isn't an automatic ticket out of poverty for the humans who live there, a unique long-term study shows. Often those who benefit most from nature-based tourism are people who already have resources. The truly impoverished have a harder time breaking into the tourism business, according to the paper, "Drivers and Socioeconomic Impacts of Tourism Participation in Protected Areas," published in the April 25 edition of PLoS One. The study looks at nearly a decade of burgeoning ...

Taking their cue from the humble leaf, researchers have used microscopic folds on the surface of photovoltaic material to significantly increase the power output of flexible, low-cost solar cells. The team, led by scientists from Princeton University, reported online April 22 in the journal Nature Photonics that the folds resulted in a 47 percent increase in electricity generation. Yueh-Lin (Lynn) Loo, the principal investigator, said the finely calibrated folds on the surface of the panels channel light waves and increase the photovoltaic material's exposure to light. "On ...

Accredited nursing homes report a stronger resident safety culture than nonaccredited facilities, according to a new study published in the May 2012 issue of The Joint Commission Journal on Quality and Patient Safety. The study shows that senior managers at more than 4,000 facilities across the U.S. identify Joint Commission accreditation as a positive influence on patient safety issues such as staffing, teamwork, training, nonpunitive responses to mistakes, and communication openness. The findings that accreditation stimulates positive changes in safety-related organizational ...

Obesity during pregnancy puts women at higher risk of a multitude of challenges. But, according to a new study presented earlier this month at the American Institute of Ultrasound in Medicine annual convention, fetal growth restriction, or the poor growth of a baby while in the mother's womb, is not one of them. In fact, study authors from the University of Rochester Medical Center found that the incidence of fetal growth restriction was lower in obese women when compared to non-obese women. Researchers, led by senior study author and high-risk pregnancy expert Loralei ...

Today's cars are increasingly custom-built. One customer might want electric windows, heated door mirrors and steering-wheel-mounted stereo controls, while another is satisfied with the minimum basic equipment. The situation with aircraft is no different: each airline is looking for different interior finishes – and lighting, ventilation, seating and monitors are different from one company to the next. Yet the customer's freedom is the manufacturer's challenge: because individual parts and mountings have to be installed in different locations along the fuselage, automated ...

Scientists with the Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley have directed the first self-assembly of nanoparticles into device-ready materials. Through a relatively easy and inexpensive technique based on blending nanoparticles with block co-polymer supramolecules, the researchers produced multiple-layers of thin films from highly ordered one-, two- and three-dimensional arrays of gold nanoparticles. Thin films such as these have potential applications for a wide range of fields, including computer memory storage, ...

The most transparent, lightweight and flexible material ever for conducting electricity has been invented by a team from the University of Exeter. Called GraphExeter, the material could revolutionise the creation of wearable electronic devices, such as clothing containing computers, phones and MP3 players. GraphExeter could also be used for the creation of 'smart' mirrors or windows, with computerised interactive features. Since this material is also transparent over a wide light spectrum, it could enhance by more than 30% the efficiency of solar panels. Adapted from ...

CAMBRIDGE, Mass. (April 27, 2012) – As any crime show buff can tell you, DNA evidence identifies a victim's remains, fingers the guilty, and sets the innocent free. But in reality, the processing of forensic DNA evidence takes much longer than a 60-minute primetime slot. To create a victim or perpetrator's DNA profile, the U.S. Federal Bureau of Investigation (FBI) scans a DNA sample for at least 13 short tandem repeats (STRs). STRs are collections of repeated two to six nucleotide-long sequences, such as CTGCTGCTG, which are scattered around the genome. Because the ...

RIVERSIDE, Calif. — Avocado, a significant fruit crop grown in many tropical and subtropical parts of the world, is threatened by Phytophthora root rot (PRR), a disease that has already eliminated commercial avocado production in many areas in Latin America and crippled production in Australia and South Africa. Just in California the disease is estimated to cost avocado growers approximately $30-40 million a year in production losses. Research on developing PRR-tolerant rootstocks to manage the disease has been a major focus of avocado research at the University of California, ...

A study to be published in the June 2012 issue of Journal of Adolescent Health looking at the relationships between body satisfaction and healthy psychological functioning in overweight adolescents has found that young women who are happy with the size and shape of their bodies report higher levels of self-esteem. They may also be protected against the negative behavioral and psychological factors sometimes associated with being overweight. A group of 103 overweight adolescents were surveyed between 2004 and 2006, assessing body satisfaction, weight-control behavior, ...

A recent paper by Kathleen Eggleson, a research scientist in the Center for Nano Science and Technology (NDnano) at the University of Notre Dame, provides an example of a nanotechnology-related safety and ethics problem that is unfolding right now. The world of nanotechnology, which involves science and engineering down at billionths-of-a-meter scales, might seem remote. But like most new advances, the application of that technology to everyday experience has implications that can affect people in real ways. If not anticipated, discussed or planned for, some of those ...

VIDEO: In this time series animation, vegetation appears red and the bare soil of fallow fields or sparsely vegetated grasslands appear white to green. The blue-gray X near the center of... Click here for more information. A water-rich polka dot pattern takes over the traditional rectangular patchwork of fields in this time series animation of 40 years of Landsat images. In the dry Texas panhandle near the town of Dalhart, this transformation is due to center-pivot irrigation, ...

Researchers at Moffitt Cancer Center and colleagues have found that adolescents newly diagnosed with cancer have strong concerns about their ability to have children as cancer survivors. They also found that standard health-related quality-of-life survey tools used to elicit answers from teens with cancer did not accurately reflect these concerns. Parents, who often answer survey questions as proxies, often inaccurately relayed their child's reproductive concerns. The study, carried out by Moffitt researchers and colleagues from the University of South Florida, the University ...

At Moffitt Cancer Center, patients with stage III and IV unresectable melanoma are now routinely genetically profiled for several gene mutations, including the BRAF gene, a known driver oncogene for melanoma. Research has shown that mutations in the BRAF gene determine sensitivity or resistance to a class of drugs that are BRAF inhibitors. "We have found that a large number of patients with melanoma who have the BRAF gene mutation quickly develop resistance to drugs that are BRAF inhibitors," said Jeffrey S. Weber, M.D., Ph.D., director of the Donald A. Adam Comprehensive ...

Researchers at Moffitt Cancer Center have placed new emphasis on gathering data on cancer patient quality of life during both treatment and survivorship. Their focus is on gathering and using that data to develop interventions to improve the quality of life for patients in treatment and for cancer survivors. Much of the quality of life and survivorship research is carried out by researchers in Moffitt's Department of Health Outcomes & Behavior. "Among the several research goals of the Department of Health Outcomes & Behaviors is the evaluation and improvement of quality ...

A new study from researchers at the Bangkok Breast Center shows significant improvement in the detection of breast cancer in Asian women using automated breast volume sonography (ABVS) as compared to hand-held ultrasound (HHUS). In their study on 504 findings in 212 patients at the Bangkok Breast Center, researchers found that ABVS agreed with HHUS in detecting 15 suspicious lesions, uncovered 12 additional suspicious lesions, and excluded 3 suspicious lesions in these cases. A coordinating five-year retrospective study on 26,741 mammograms with ultrasound also revealed ...

As skiing and snowboarding continue to be the most popular winter sports, they also carry a significant risk of injury. One new exhibit will show how radiologists can meet these injuries head on with proper patient management and the latest imaging techniques. "It is important for radiologists to understand these injuries patterns," said Dr. Hillary Boortz, lead author for this exhibit. "When a patient presents with the appropriate history, the radiologist can properly protocol the study and alter their search algorithms to assure that an injury isn't overlooked." She ...

As more patients are referred to tertiary care center with previous images, a new study from researchers at the Westchester Medical Center shows how radiologists are tackling the challenges of interpreting outside studies and reviewing discordance opinions. "Outside studies were becoming a problem in our institution," said Dr. Zvi Lefkovitz, co-lead for this study. "We were receiving a lot of disjointed, fly-by-night examinations, and we had no formalized policy for reviewing these exams." Lefkovitz and his team began a comprehensive process of overhauling their procedures, ...

Shoulder injuries are among the most frequently encountered musculoskeletal injuries treated in emergency departments. One new study shows how radiologists can more effectively identify these injuries and improve patient outcomes. "The severity of shoulder injuries are often underestimated," said Dr. Scott Sheehan, lead author for the study. "Subtle injuries can have significant consequences if not recognized and treated promptly." Sheehan and his co-authors began studying the effects of traumatic shoulder injuries after one of his radiology mentors suffered a shoulder ...

A new study from UCLA shows how magnetic resonance angiography (MRA) and computed tomography angiography (CTA) are equivalent in delineating anatomy in living renal donors. In a study that examined 30 patients and 60 kidneys, both modalities were "excellent" in detecting the number of renal arteries and veins. Dr. Mittul Gulati, lead author for the study noted, "either MRA or CTA are great tools for helping surgeons remove kidneys safely, identifying donor and recipient veins and vessels, and identifying incidental findings." The results could potentially reduce radiation ...

With the increase of obesity in the last 50 years, bariatric surgeries are becoming a common solution for tackling this epidemic. A new exhibit shows how radiologists play a key role in ensuring the success of these procedures. "Although complications are generally rare with Roux-en-Y gastric bypass and gastric banding procedures, it's critical for radiologists to be familiar with both the normal presentations and possible complications for these surgeries," said Dr. Mariam Moshiri, lead author for this presentation. Dr. Moshiri and her co-authors at the University ...