HOUSTON – (July 9, 2012) -- What's 100 times stronger than steel, weighs one-sixth as much and can be snapped like a twig by a tiny air bubble? The answer is a carbon nanotube -- and a new study by Rice University scientists details exactly how the much-studied nanomaterials snap when subjected to ultrasonic vibrations in a liquid. "We find that the old saying 'I will break but not bend' does not hold at the micro- and nanoscale," said Rice engineering researcher Matteo Pasquali, the lead scientist on the study, which appears this month in the Proceedings of the National ...

MIAMI – July 9, 21012 -- The Deepwater Horizon oil spill in spring 2010 is the largest oil spill in the history of the United States, with more than 200 million gallons of crude oil released at about 1,500 m. depth off the Mississippi Delta in the Gulf of Mexico. At the time of the accident, the proximity of the intense Loop Current, flowing from the Yucatan Channel to the Florida Straits, raised major concerns that the oil at the surface of the ocean would be headed toward the South Florida and East Atlantic coastal areas. However, the dominant transport of oil and oil ...

Sixty percent of persons incarcerated for gun crimes in the thirteen U.S. states with the most lax standards for legal firearm ownership were not legally prohibited from possessing firearms when they committed the crime that led to their incarceration. According to the study by researchers at the Johns Hopkins Bloomberg School of Public Health, 31 percent of these gun offenders were old enough to possess a firearm and had no prior disqualifying record. But 29 percent had criminal records or would have been too young to legally possess a firearm in states with the strictest ...

ST. LOUIS -- In research funded by the National Institutes of Health and the American Heart Association and published in EMBO Molecular Medicine, Saint Louis University investigator Ángel Baldán, Ph.D., found that the microRNA miR-33 plays a key role in regulating bile metabolism. Further, the research suggests that, in an animal model, the manipulation of this microRNA can improve the liver toxicity that can be caused by statins. "As we learn more about the way cholesterol is moved and metabolized through the body, we have more tools at our disposal to try to limit ...

PROVIDENCE, R.I. [Brown University] — When a person is sick, there is a tell-tale sign in their blood: a different mix of the various types of immune cells called leukocytes. A group of scientists at several institutions including Brown University has discovered a way to determine that mix from the DNA in archival or fresh blood samples, potentially providing a practical new technology not only for medical research but also for clinical diagnosis and treatment monitoring of ailments including some cancers. The key to the new technique, described in two recent papers, ...

Alexandria, VA – Resting in the Karakoram Range between northern Pakistan and western China, the Karakoram glaciers are stumping scientists. Unlike most mountain glaciers, the Karakoram glaciers, which account for 3 percent of the total ice-covered area in the world, excluding Greenland and Antarctica, are not shrinking. On the contrary, a team of French glaciologists has recently confirmed that these glaciers on average have remained stable or may have even grown slightly in recent years. Although all glacial regions evolve in unique ways, why are these glaciers bucking ...

A common belief in the West is that al Qaeda wishes to impose Islam everywhere. This might be a pipe dream for the group, but a new study of their use of religious texts suggests that Islamists' goals are much more modest. Researchers with Arizona State University's Center for Strategic Communication (CSC) analyzed more than 2,000 items of propaganda from al Qaeda and related Islamist groups from 1998 to 2011. They catalogued more than 1,500 quotes from the Qur'an that extremists used to support their arguments, and identified the chapter (surah) and verse represented ...

An estimated 3.8 million California adults — particularly those in households with children, as well as low-income Latinos — could not afford to put adequate food on the table during the recent recession, according to a new policy brief by the UCLA Center for Health Policy Research. In 2009, about one in six low-income Californians had "very low food security," which describes multiple instances in which people had to cut their food intake and experienced hunger, according to the study, which is based on data from the California Health Interview Survey. This is double ...

Skin squamous cell carcinoma (SCC) is a subtype of very aggressive skin cancers that usually develops in sunexposed body regions, but can also affect a large number of organs such as the bladder, esophagus, lungs etc. However, little is known about the biology of these cells, which consequently makes difficult the generation of new specific therapies; actually, the standard treatments are based on surgery and subsequent radiotherapy. Researchers at the Spanish National Cancer Research Centre (CNIO) led by Erwin Wagner, vice-director of Basic Research and director of BBVA ...

CHAMPAIGN, lll. — A new study of aged female rats found that long-term treatment with estrogen and a synthetic progesterone known as MPA increased levels of a protein marker of synapses in the prefrontal cortex, a brain region known to suffer significant losses in aging. The new findings appear to contradict the results of the Women's Health Initiative, a long-term study begun in 1991 to analyze the effects of hormone therapy on a large sample of healthy postmenopausal women aged 50 to 79. Among other negative findings, the WHI found that long-term exposure to estrogen ...

For so many important outcomes in life – applying for jobs, waiting for medical test results – there comes a point when you just have to sit back and hope for the best. But that doesn't mean we always behave that way. New research published in Psychological Science, a journal of the Association for Psychological Science, suggests that even when an outcome is out of our control we often act as though we can still get on the good side of fate by doing good deeds. According to lead researcher Benjamin Converse, Assistant Professor of Public Policy and Psychology at the University ...

Researchers funded by the National Institutes of Health have developed a new silk-based stabilizer that, in the laboratory, kept some vaccines and antibiotics stable up to temperatures of 140 degrees Fahrenheit. This provides a new avenue toward eliminating the need to keep some vaccines and antibiotics refrigerated, which could save billions of dollars every year and increase accessibility to third world populations. Vaccines and antibiotics often need to be refrigerated to prevent alteration of their chemical structures; such alteration can result in less potent or ...

Marine scientists at the University of North Carolina at Chapel Hill have linked the decline in growth of Caribbean forereef corals — due to recent warming — to long-term trends in seawater temperature experienced by these corals located on the ocean-side of the reef. The research was conducted on the Mesoamerican Barrier Reef System in southern Belize. The results were revealed online in the July 8 issue of Nature Climate Change, a journal that publishes research on the impacts of global climate change and its implications for the economy, policy and the world at large. ...

New research from Norris Cotton Cancer Center estimates, for the first time, the impact of an R rating for movie smoking. James Sargent, MD, co-director of the Cancer Control Research Program at Norris Cotton Cancer Center, emphasizes that an R rating for any film showing smoking could substantially reduce smoking onset in U.S. adolescents -- an effect size similar to making all parents maximally authoritative in their parenting, Sargent says. "Smoking is a killer. Its connection to cancer, heart attacks, and chronic lung disease is beyond doubt. Kids start to smoke before ...

Researchers have discovered yet another way to harvest small amounts of electricity from motion in the world around us – this time by capturing the electrical charge produced when two different kinds of plastic materials rub against one another. Based on flexible polymer materials, this "triboelectric" generator could provide alternating current (AC) from activities such as walking. The triboelectric generator could supplement power produced by nanogenerators that use the piezoelectric effect to create current from the flexing of zinc oxide nanowires. And because these ...

PITTSBURGH—Drivers can struggle to see when driving at night in a rainstorm or snowstorm, but a smart headlight system invented by researchers at Carnegie Mellon University's Robotics Institute can improve visibility by constantly redirecting light to shine between particles of precipitation. The system, demonstrated in laboratory tests, prevents the distracting and sometimes dangerous glare that occurs when headlight beams are reflected by precipitation back toward the driver. "If you're driving in a thunderstorm, the smart headlights will make it seem like it's a ...

Newer technologies designed to help people with type 1 diabetes monitor their blood sugar levels daily work better than traditional methods and require fewer painful needle sticks, new Johns Hopkins research suggests. The research findings, published online in the July 10 issue of the Annals of Internal Medicine, suggest that even though these diabetic control technologies are more costly, people with diabetes who use an insulin pump are more satisfied with their treatment and quality of life than those who give themselves insulin shots many times a day. Researchers ...

In 1928, chemists Otto Diels and Kurt Alder first documented diene synthesis, a chemical reaction important for synthesizing many polymers, alkaloids and steroids. Their work on this mechanism, which came to be known as the Diels–Alder reaction, won them the 1950 Nobel Prize in chemistry. Since then, the iconic reaction has become the most commonly used and studied mechanism in organic chemistry. But what happens during the reaction has never been entirely clear. Now, Kendall N. Houk, UCLA's Saul Winstein Professor of Organic Chemistry, and colleagues report exactly ...

A new study suggests that echocardiography be included as part of screenings to help identify student athletes with heart problems that could lead to sudden death. The Cincinnati Children's Hospital Medical Center study, presented recently at the annual meeting of the American Society of Echocardiography, suggests adding a modified echo to the current practice of taking an EKG, getting a family history and having a physical exam. "EKG is a good tool, but may not be sensitive enough to catch problems that could lead to sudden death," says Michelle Grenier, MD, a physician ...

Scientists at the Johns Hopkins Kimmel Cancer Center, working with Danish researchers, have developed a novel anticancer drug designed to travel -- undetected by normal cells -- through the bloodstream until activated by specific cancer proteins. The drug, made from a weedlike plant, has been shown to destroy cancers and their direct blood supplies, acting like a "molecular grenade," and sparing healthy blood vessels and tissues. In laboratory studies, researchers said they found that a three-day course of the drug, called G202, reduced the size of human prostate tumors ...

CAIRNS, Australia and STANFORD, California – 9 July 2012 -- Like their warrior ancestors, leaders of many Pacific Island nations have been making efforts to safeguard their countries, this time by sounding an alarm as the impact of climate change becomes more apparent. Today their efforts received a big boost with the release of a Scientific Consensus Statement on Climate Change and Coral Reefs that is supported by over 2,400 scientists, showing the threats that reef corals are under across the globe and calling for governments worldwide to take steps to protect valuable ...

Many of the predictions we make in everyday life are vague, and we often get them wrong because we have incomplete information, such as when we predict the weather. But in quantum mechanics, even if all the information is available, the outcomes of certain experiments generally can't be predicted perfectly beforehand. This inability to accurately predict the results of experiments in quantum physics has been the subject of a long debate, going back to Einstein and co-workers, about whether quantum mechanics is the best way to predict outcomes. Researchers from ...

Alzheimer's disease is one of the most dreaded and debilitating illnesses one can develop. Currently, the disease afflicts 6.5 million Americans and the Alzheimer's Association projects it to increase to between 11 and 16 million, or 1 in 85 people, by 2050. Cell death in the brain causes one to grow forgetful, confused and, eventually, catatonic. Recently approved drugs provide mild relief for symptoms but there is no consensus on the underlying mechanism of the disease. "We don't know what the problem is in terms of toxicity," said Joan-Emma Shea, professor of chemistry ...

There are two hurricanes in the Eastern Pacific today, Daniel and Emilia. NASA's TRMM satellite passed over both storms in pinpointed the intensity of the rainfall within each storm, indicative of their power. Emilia is dropping rain at a greater rate than Daniel according to satellite data. Tropical storm Daniel strengthened and became the third hurricane over the weekend, and today, Monday, July 9, Tropical Storm Emilia strengthened into the fourth hurricane of the season. Tropical storm Emilia formed on July 7 as tropical depression 5E and became a tropical storm on ...

MADISON- A study of university students is the first evidence to refute the supposed link between depression and the amount of time spent on Facebook and other social-media sites. The University of Wisconsin School of Medicine and Public Health study suggests that it may be unnecessarily alarming to advise patients and parents on the risk of "Facebook Depression" based solely on the amount of Internet use. The results are published online today in the Journal of Adolescent Health. Last year, the American Academy of Pediatrics released a report on the effects of social ...