A cosmic one-two punch of colossal volcanic eruptions and meteorite strikes likely caused the mass-extinction event at the end of the Cretaceous period that is famous for killing the dinosaurs 65 million years ago, according to two Princeton University reports that reject the prevailing theory that the extinction was caused by a single large meteorite. Princeton-led researchers found that a trail of dead plankton spanning half a million years provides a timeline that links the mass extinction to large-scale eruptions of the Deccan Traps, a primeval volcanic range in western ...

HUNTINGTON, W.Va. – Recent studies conducted at Marshall University have demonstrated that nanoparticles of cerium oxide -- common diesel fuel additives used to increase the fuel efficiency of automobile engines -- can travel from the lungs to the liver and that this process is associated with liver damage. The data in the study by Dr. Eric R. Blough and his colleagues at Marshall's Center for Diagnostic Nanosystems indicate there is a dose-dependent increase in the concentration of cerium in the liver of animals that had been exposed to the nanoparticles, which are ...

COLUMBIA, Mo. – More than 20 years ago, Charles Borduin, a University of Missouri researcher, developed a treatment for juvenile offenders that has become one of the most widely used evidence-based treatments in the world. Now, he has found that the treatment continues to have positive effects on former participants more than 20 years after treatment. Throughout the course of his career, Borduin, professor of psychological sciences in the College of Arts & Science, has pioneered the treatment called Multisystemic Therapy (MST) as a way to prevent serious mental health ...

KANSAS CITY, MO -- Each time a cell divides -- and it takes millions of cell divisions to create a fully grown human body from a single fertilized cell -- its chromosomes have to be accurately divvied up between both daughter cells. Researchers at the Stowers Institute for Medical Research used, ironically enough, the single-celled organism Saccharomyces cerevisiae -- commonly known as baker's yeast -- to gain new insight into the process by which chromosomes are physically segregated during cell division. In a study published in the Nov. 17, 2011 issue of PLoS Genetics, ...

The Somoto toolbar was recently released by the company. It is considered as one of their solutions for monetization. The Somoto toolbar have been provided to the community of freeware programmers and software program. They are making preparations for total expansion by using launches of contemporary product and additional partners joining the membership of the network. Somoto was founded by Eyal Yaakov and Ben Garrun. They recognized that programmers had a necessity for improved software, amplified revenues and increased distribution functionality. The two founders have ...

Attorney website design and marketing agency Legal Web Experts is announcing the launch of http://www.mylegalbookmarks.com , the first social bookmarking website for lawyers and legal professionals. The site allows users to share news, websites, internet resources and other law-related web content with individuals in the legal profession as well as people with similar interests. "The legal industry is so large and has so much information available online that it deserves a social bookmarking website dedicated to it specifically," says Ryan Nelson, Director ...

Transsexual individuals who identify themselves as such in the workplace are more likely to have greater satisfaction and commitment to their job than transsexuals who do not, according to a new study from Rice University and Pennsylvania State University. "Trans-parency in the Workplace: How the Experiences of Transsexual Employees Can Be Improved" will appear in an upcoming issue of the Journal of Vocational Behavior. For the study, researchers surveyed 88 transsexuals across the nation about their workplace experiences to determine what factors impact their job satisfaction ...

WASHINGTON, November 17, 2011 -- Factors such as low hemoglobin levels, increased systolic blood pressure, and male gender are linked to a higher risk of silent cerebral infarcts (SCIs), or silent strokes, in children with sickle cell anemia (SCA), according to results from a large, first-of-its-kind study published online today in Blood, the Journal of the American Society of Hematology (ASH). Silent strokes are the most common form of neurological injury found in SCA, with more than 25 percent of children with the disorder suffering a SCI by age six,1 and nearly 40 ...

While shorter days and colder weather move many of us to hunker under the covers, researchers who spent their summers in fieldwork are more likely to be hunched over microscopes and curled over keyboards, scrutinizing samples and crunching data from their summer's labors. One such researcher is marine biologist William Gilly, who spent a month last summer in Mexico's Sea of Cortez tracking the sometimes-elusive Humboldt squid. Researchers from several universities were on the voyage. Gilly is in the second year of a quest to understand the surprisingly strong impact ...

LIVERMORE, Calif. -- In order to separate human-caused global warming from the "noise" of purely natural climate fluctuations, temperature records must be at least 17 years long, according to climate scientists. To address criticism of the reliability of thermometer records of surface warming, Lawrence Livermore National Laboratory scientists analyzed satellite measurements of the temperature of the lower troposphere (the region of the atmosphere from the surface to roughly five miles above) and saw a clear signal of human-induced warming of the planet. Satellite measurements ...

ITHACA, N.Y. - Like a shadowy character just hidden from view, a mystery atom in the middle of a complex enzyme called nitrogenase had long hindered scientists' ability to study the enzyme fully. But now an international team of scientists led by Serena DeBeer, Cornell assistant professor of chemistry and chemical biology, has pulled back the curtain using powerful synchrotron spectroscopy and computational modeling to reveal carbon as the once-elusive atom. The research was published online Nov. 17 in the journal Science. "For chemists, one of the first steps you ...

Stocks of Atlantic salmon (Salmo salar), which have been steadily declining for the past few decades, are facing new challenges in the Gulf of Maine, where changing spring wind patterns, warming sea surface temperatures and new predators along altered migration routes are affecting their survival. In a paper published online in the journal Fisheries Management and Ecology, Kevin Friedland and co-authors suggest post-smolts are entering an increasingly warmer coastal ocean, where they are facing mortality risks associated with a changing climate, such as changing distributions ...

Researchers at NYU Langone Medical Center have discovered a protein called TAT-5 that affects the production of extracellular vesicles, small sacs of membrane released from the surface of cells, capable of sending signals to other cells. When released extracellular vesicles can affect tumor spread, blood clotting and inflammation. Their discovery gives new insight into how extracellular vesicles form, and reveals new potential strategies to manipulate diseases such as cancer. The study was published online November 17, 2011 in Current Biology. "Very little is known ...

It was not too long ago that basic science lectures began with the three forms of matter: gases, liquids and solids—and somewhere along the line plasmas were occasionally added to the list. But to be precise, a plasma is an ionized gas; thus, a subset of the big three. But this subset has coexisted with the other forms since the Big Bang and actually makes up 99 percent of the universe. It is found in our Sun and all the other stars, and in more down to earth applications: in neon signs, Plasma TVs, Cathode Ray Tubes, and the ubiquitous fluorescent light. It is now ...

[San Francisco, CA] – A new study, led by PRBO Conservation Science (PRBO), projects a bleak future for San Francisco Bay's tidal marshes under high-end sea-level rise scenarios that are increasingly likely. PRBO and colleagues found that in the worst case scenario 93% of San Francisco Bay's tidal marsh could be lost in the next 50-100 years [with 5.4 feet or 1.65 meters of sea-level rise, low sediment availability and no significant restoration]. PRBO's study indicates, however, that not all marshes will be lost and that society's actions today, including restoration ...

Much to humans' chagrin, bacteria have superior survival skills. Their decision-making processes and collective behaviors allow them to thrive and even spread efficiently in difficult environments. Now researchers at Tel Aviv University have developed a computational model that better explains how bacteria move in a swarm — and this model can be applied to man-made technologies, including computers, artificial intelligence, and robotics. Ph.D. student Adi Shklarsh — with her supervisor Prof. Eshel Ben-Jacob of TAU's Sackler School of Physics and Astronomy, Gil Ariel ...

Although scientists have known for centuries that many bacteria produce hydrogen sulfide (H2S) it was thought to be simply a toxic by-product of cellular activity. Now, researchers at NYU School of Medicine have discovered H2S in fact plays a major role in protecting bacteria from the effects of numerous different antibiotics. In the study led by Evgeny Nudler, PhD, the Julie Wilson Anderson Professor of Biochemistry at NYU School of Medicine, researchers found evidence that H2S acts as a general defense mechanism against oxidative stress, the process through which ...

New details about the birth of a famous black hole that took place millions of years ago have been uncovered, thanks to a team of scientists who used data from NASA's Chandra X-ray Observatory as well as from radio, optical and other X-ray telescopes. Over three decades ago, Stephen Hawking placed -- and eventually lost – a bet against the existence of a black hole in Cygnus X-1. Today, astronomers are confident the Cygnus X-1 system contains a black hole, and with these latest studies they have remarkably precise values of its mass, spin, and distance from Earth. With ...

For the first time, astronomers have produced a complete description of a black hole, a concentration of mass so dense that not even light can escape its powerful gravitational pull. Their precise measurements have allowed them to reconstruct the history of the object from its birth some six million years ago. Using several telescopes, both ground-based and in orbit, the scientists unravelled longstanding mysteries about the object called Cygnus X-1, a famous binary-star system discovered to be strongly emitting X-rays nearly a half-century ago. The system consists of ...

A new study of flower petals shows evolution in action, and contradicts more that 60 years of scientific thought. The findings are reported by a scientist from UC Santa Barbara and a research team from Harvard University in the Proceedings of the Royal Society B this week. Columbine flowers, known as Aquilegia, evolved several lengths of petal spurs that match the tongue lengths of their pollinators, including bees, hummingbirds, and hawkmoths. The petal spurs are shaped like a tubular pocket and contain nectar at the tip. The spurs grow from 1 to 16 centimeters in ...

The removal of rare tumor cells circulating in the blood might be possible with the use of biomolecules bound to dendrimers, highly branched synthetic polymers, which could efficiently sift and capture the diseased cells, according to new research at the University of Illinois at Chicago. Dendrimers have been used to encapsulate drug molecules and serve as a delivery vehicle, but in the new study they were employed to capture circulating tumor cells by biomimicry -- using nanotechnology to create artificial surfaces much like those in real cells. "We want to take advantage ...

WHITE PLAINS, N.Y., Nov. 17, 2011 – The nation's preterm birth rate slipped under 12 percent for the first time in nearly a decade, the fourth consecutive year it declined, potentially sparing tens of thousands of babies the serious health consequences of an early birth. The national preterm birth rate declined to 11.99 percent last year, according to the National Center for Health Statistics, which released its report "Births: Preliminary Data for 2010," today, the first-ever World Prematurity Day. Despite the improvement, still too many babies, one out of every eight, ...

Researchers the world over are seeking reliable ways to predict earthquakes, focusing on identifying seismic precursors that, if detected early enough, could serve as early warnings. New research, published this week in the journal Applied Physics Letters, suggests that ozone gas emitted from fracturing rocks could serve as an indicator of impending earthquakes. Ozone is a natural gas, a byproduct of electrical discharges into the air from several sources, such as from lightning, or, according to the new research, from rocks breaking under pressure. Scientists in the ...

For people who initially survive a heart attack, a significant cause of death in the next few days is cardiac rupture -- literally, bursting of the heart wall. A new study by University of Iowa researchers pinpoints a single protein as the key player in the biochemical cascade that leads to cardiac rupture. The findings, published Nov. 13 as an Advance Online Publication (AOP) of the journal Nature Medicine, suggest that blocking the action of this protein, known as CaM kinase, may help prevent cardiac rupture and reduce the risk of death. After a heart attack, the ...

Irvine, Calif., Nov. 17, 2011 – A team of researchers from UC Irvine, HRL Laboratories and the California Institute of Technology have developed the world's lightest material – with a density of 0.9 mg/cc – about 100 times lighter than Styrofoam. Their findings appear in the Nov. 18 issue of Science. The new material redefines the limits of lightweight materials because of its unique "micro-lattice" cellular architecture. The researchers were able to make a material that consists of 99.99 percent air by designing the 0.01 percent solid at the nanometer, micron and millimeter ...