Bethesda, MD -- Radiofrequency ablation (RFA) leads to remission for 91 percent of patients with dysplastic Barrett's esophagus, according to new figures published in Clinical Gastroenterology and Hepatology, the official clinical practice journal of the American Gastroenterological Association. Dysplastic Barrett's esophagus is the most serious grade of the condition in which precancerous cells are detected in the esophagus. "In order to make appropriate informed decisions about the use of radiofrequency ablation, patients and providers need to be well versed in the ...

A detailed annotated checklist of the scale insects of Iran, describing a total of 275 species from 13 families, represents a first effort towards a better knowledge of the Coccoidea family in attempt to improve the view in practical fields such as pest control management. The scale insects species are listed along with their locality data and host plants. In addition to latest species names for any record, new records for Iran and new host plants for some scale insects species. The study was published in the open access journal Zookeys. Scale insects of the superfamily ...

This news release is available in German. Graphene, a crystal composed of only one layer of carbon atoms arranged in a regular hexagon, is regarded as a material which is believed to be capable of performing miracles, in particular in the fields of electronics, sensor technology and display technology, but also in metrology. Only four years after the first successful preparation of graphene, its discoverers Geim and Novoselov were therefore awarded a Nobel Prize. As the original preparation method (flaking of single atomic layers of graphite) does not offer a good ...

BLOOMINGTON, Ind. -- The dramatic explosion of flowering plant species that occurred about 100 million years ago was thought to have been good news for evolving mammals, providing them with new options for food and habitat. But research by geologists at Indiana University Bloomington suggests that wasn't necessarily the case. In a study published in the journal Proceedings of the Royal Society B, David Grossnickle and P. David Polly present evidence that mammal varieties declined during the great angiosperm radiation of the mid-Cretaceous, a time when a great diversity ...

CAMBRIDGE, Mass-- In a completely unexpected finding, MIT researchers have discovered that tiny water droplets that form on a superhydrophobic surface, and then "jump" away from that surface, carry an electric charge. The finding could lead to more efficient power plants and a new way of drawing power from the atmosphere, they say. The finding is reported in a paper in the journal Nature Communications written by MIT postdoc Nenad Miljkovic, mechanical engineering professor Evelyn Wang, and two others. Miljkovic says this was an extension of previous work by the MIT ...

(WASHINGTON, October 2, 2013) – New research shows that children with an inherited genetic defect in a critical anti-inflammatory pathway have a genetic predisposition to lymphoma. Results of the study, published online today in Blood, the Journal of the American Society of Hematology (ASH), reveal an important association between the genetic defect, which causes chronic intestinal inflammation and early onset inflammatory bowel disease, and its role in cancer development in infants and children. Among the hundreds of signaling pathways in the human immune system that ...

A team of scientists from The University of Texas at Arlington and MIT has figured out how to quantitatively observe cellular processes taking place on so-called "lab on a chip" devices in a silicon environment. The new technology will be useful in drug development as well as disease diagnosis, researchers say. In a paper published in Nature's online journal Scientific Reports, the team said it overcame past limitations on quantitative microscopy through an opaque media by working with a new combination of near infrared light and a technique called quantitative phase ...

WASHINGTON, Oct. 2, 2013—For hundreds of years, optical devices like telescopes and microscopes have relied on solid lenses that slide up and down to magnify and to focus. To tune how much light is received, conventional devices use mechanical contraptions like the blades that form the adjustable aperture in cameras. To meet demands for ever smaller imaging systems, researchers are working to create entirely unconventional ways of focusing light. In pursuit of this vision, engineers from the University of Freiburg in Germany have built a novel type of imaging system inspired ...

COLUMBUS, Ohio -- In a year-long case study of a major American transportation company, researchers at The Ohio State University have uncovered the strategies that helped the company maintain safety and meet customer demand during 2012's Hurricane Sandy. One key to the company's effective response was its setup of a weather event management team, an ad hoc group that set planning priorities as the storm approached the United States, ensuring the protection of personnel and equipment in hurricane's path. More surprisingly, as landfall was imminent, the company's schedulers ...

This news release is available in German. How far above sea level is a place located? And where exactly is "sea level"? It is one objective of the geodesists to answer these questions with 1 cm accuracy. Conventional measurement procedures or GPS technologies via satellites, however, reach their limits here. Now optical atomic clocks offer a new approach, because the tick rate of a clock is influenced by gravity. This well-known, but tiny effect was measured with unprecedented precision in 2010 using two optical clocks – however, they were located at the same institute. ...

A new study has found that liquid wastes from hydraulic fracturing, or "fracking," that was treated and released into local streams in Pennsylvania still contained elevated levels of salts and other contaminants, which could be dangerous to aquatic life and human health. The study also reports high levels of radioactive materials in stream sediments at the disposal site. Published in the ACS journal Environmental Science & Technology, it states that the scientists recommend use of advanced treatment technologies to further remove the potentially harmful material. Avner ...

The harmful effects of increasingly popular designer cannabis products called "Spice" or "K2" have puzzled scientists for years, but now a group of researchers is reporting progress toward understanding what makes them so toxic. The study, published in the ACS journal Analytical Chemistry, describes development of a method that could someday help physicians diagnose and treat the thousands of young adults and teens who end up in emergency rooms after taking the drugs. Jeffery Moran and colleagues note that synthetic marijuana, often marketed as "natural incense," "potpourri," ...

The notorious bacteria E. coli is best known for making people sick, but scientists have reprogrammed the microbe — which also comes in harmless varieties — to make it seek out and fight other disease-causing pathogens. The researchers' report appears in the journal ACS Synthetic Biology and describes development of this new type of E. coli that can even kill off slimy groups of bacteria called biofilms that are responsible for many hard-to-treat infections, such as those that take hold in the lungs, the bladder and on implanted medical devices. Matthew Wook Chang and ...

Toronto -- "We found that a critical element was having the freedom to choose whether to do it or not," says John Trougakos, , who is an associate professor in the Department of Management at the University of Toronto Scarborough, and holds a cross-appointment to the UofT's Rotman School of Management. "The autonomy aspect helps to offset what we had traditionally thought was not a good way to spend break time." Co-written with Bonnie Cheng, a Rotman PhD student, Prof. Ivona Hideg of Wilfrid Laurier University (who is also a graduate of the Rotman PhD program) and Prof. ...

Three-dimensional printers can make artists' and hobbyists' dreams a reality, opening up a new world of inexpensive, on-demand plastic parts manufacturing, producing anything from garden gnome figurines to nuts and screws, but there's also a dark side. As these printers — now available at major U.S. retail stores — become more popular, concerns are growing about their use for designing and building custom plastic firearms — weapons that could conceivably go undetected. The cover story in Chemical & Engineering News, the weekly newsmagazine of the American Chemical Society, ...

Philadelphia, PA—A photo captures only as much as the camera in use will allow, and is therefore limited by the field of view of the camera's lens. In the case of smartphones and many advanced cameras, the view from the lens is much smaller than the view from your own eyes. Panoramic photographs were invented to capture large objects or scenes that could not otherwise fit within the constraints of a single photo. Panoramic photography is achieved through image stitching, a process that combines two or more photographs, seamlessly blending input images with overlapping ...

DURHAM, N.C. -- The timing of the first leaves on trees and plants can make or break an agricultural season. Too early, and the leaves might be blasted by the last frost. Too late and they miss out on maximizing the growing season. But as climate change brings warmer-than-usual winters to the U.S., the plants may be more vulnerable to imprecise timing, and the tools traditionally used by farmers and horticulturists to predict the season may be inadequate. "How do we do a better job of seeing the climate the way the plants see it?" asks James Clark, the Blomquist Professor ...

A team of scientists led by Dr. Antoine Adamantidis, a researcher at the Douglas Mental Health University Institute and an assistant professor at McGill University, has released the findings from their latest study, which will appear in the October issue of the prestigious scientific journal Nature Neuroscience.(1) Previous studies had established an association between the activity of certain types of neurons and the phase of sleep known as REM (rapid eye movement). Researchers on the team of Dr. Antoine Adamantidis identified, for the first time, a precise causal link ...

Technology, not uninsured patients, likely explains the steep rise in the cost of hospital care in Texas in recent years, according to Vivian Ho, the chair in health economics at Rice University's Baker Institute for Public Policy, a professor of economics at Rice and a professor of medicine at Baylor College of Medicine. Her findings were reported in an article appearing in the Oct. 1 online edition of the journal Healthcare Management, Practice and Innovation. Ho emphasized her findings contradict a public perception that the rising numbers of uninsured persons explains ...

CORVALLIS, Ore. – A new analysis by Oregon State University researchers of California's mental health system finds that comprehensive, community-based mental health programs are helping people with serious mental illness transition to independent living. Published in the October issue of the American Journal of Public Health, this study has important implications for the way that states finance and deliver mental health programs, and speaks to the effectiveness of well-funded, comprehensive community programs. In November of 2004, California voters passed the Mental ...

Transgendered androphilic males were accepted in traditional hunter-gatherer cultures because they were an extra set of hands to support their families. Conversely, by investing in and supporting their kin, these males ensured that their familial line – and therefore also their own genetic make-up – passed on to future generations despite their not having children of their own. This is according to an ethnographic study led by Doug VanderLaan of the Centre for Addiction and Mental Health in Canada, published in Springer's journal Human Nature. The study reports that this ...

Women who gain excessive weight in pregnancy are more likely to have overweight and obese children, according to a new study published this week in PLOS Medicine. A study by David Ludwig from Boston Children's Hospital in the USA and colleagues has concluded that even after making allowances for differences in birthweight, the likelihood of a child becoming obese is linked to the amount of weight that the mother gained in pregnancy. In order to find out whether childhood obesity was due just to the conditions during pregnancy (which influence birthweight) or whether ...

Community health officers (health workers who are not trained midwives) can safely give injections of the drug oxytocin to prevent severe bleeding after delivery (postpartum hemorrhage) when attending home births in rural areas of Ghana, according to a study by US and Ghanaian researchers in this week's PLOS Medicine. The researchers, led by Cynthia Stanton from the Johns Hopkins Bloomberg School of Public Health in the US, also found that oxytocin injections halved the risk of postpartum hemorrhage in women who delivered at home -- an important finding given that ...

Extended follow-up of the two Women's Health Initiative hormone therapy trials does not support use of hormones for chronic disease prevention, although the treatment may be appropriate for menopausal symptom management in some women, according to a study in the October 2 issue of JAMA. The hormone therapy trials of the Women's Health Initiative (WHI) were stopped after investigators found that the health risks outweighed the benefits. Menopausal hormone therapy continues in clinical use, but questions remain regarding its risks and benefits over the long-term for chronic ...

In a group of patients who took chronic opioids for noncancer pain and who underwent bariatric surgery, there was greater chronic use of opioids after surgery compared with before, findings that suggest the need for proactive management of chronic pain in these patients after surgery, according to a study in the October 2 issue of JAMA. "Bariatric surgery is used to treat obesity, as well as its comorbid conditions such as cardiovascular and metabolic diseases and chronic pain. Bariatric surgery-related weight loss is associated with improvements in osteoarthritis-associated ...