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142,383 articles from PhysOrg

• THURSDAY 12. FEBRUARY, 2009
• 20:10 Herpes virus: To vaccinate or not to vaccinate

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  Dr. Marcia Blackman and her research team at the Trudeau Institute have followed up on an intriguing report published in the journal Nature in May 2007 by Dr. Herbert Virgin, et al., showing that mice persistently infected with certain forms of herpesvirus, which can establish lifelong latent infections, are resistant to infection with bacterial pathogens.  

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• 20:10 Nanoparticle 'smart bomb' targets drug delivery to cancer cells

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  Researchers at North Carolina State University have successfully modified a common plant virus to deliver drugs only to specific cells inside the human body, without affecting surrounding tissue. These tiny "smart bombs" - each one thousands of times smaller than the width of a human hair - could lead to more effective chemotherapy treatments with greatly reduced, or even eliminated, side effects.  

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• 20:10 Nanoscale materials grow with the flow (Videos)

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  Imagine unloading a pile of bricks onto the ground and watching the bricks assemble themselves into a level, straight wall in only a few minutes. While merely a fantasy for builders in the everyday world, these types of self-assembled structures are a reality for those who build materials in the nanoworld. Michael C. Tringides, a senior physicist at the U.S. Department of Energy's Ames Laboratory, has shown that nanoscale "straight wall" lead islands on silicon are spontaneously and quickly created by unusually mobile atoms.  

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• 20:10 New strategy to combat cancer: Streamlining blood vessel walls

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  Our blood vessels provide all growing tissues with oxygen and nutrients. The growth of blood vessels (a process termed angiogenesis) is indispensable for the proper functioning of organs and the repair of tissues when they have become damaged.  

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• 20:10 New study shows racial disparities in Twin Cities mortgage lending (Video)

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  A new report, "Communities in Crisis," issued by the University of Minnesota Institute on Race and Poverty shows that the Twin Cities has some of the nation's worst racial disparities in mortgage lending. In the Twin Cities, those hardest hit by the subprime lending and foreclosure crisis have been communities of color.  

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• 20:10 New test may help to ensure that dengue vaccines do no harm

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  As vaccines against a virus that infects 100 million people annually reach late-stage clinical trials this year, researchers have developed a test to better predict whether a given vaccine candidate should protect patients from the infection, or in some cases, make it more dangerous, according to an article just published in the journal Clinical and Vaccine Immunology.  

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• 20:10 Researchers discover protein is crucial to reproduction of parasites involved in disease

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  As diseases go, toxoplasmosis is a wolf in sheep's clothing. Its effects are usually mild, though infection is for life, and two out of five Americans are chronically infected. Those with compromised immune systems can, however, face serious complications. And the disease can also have serious effects on a human fetus if contracted by a mother.  

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• 20:10 Researchers find startling numbers of active-military personnel engaging in frequent binge drinking

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  Binge drinking is common among active-duty military personnel and is strongly associated with many health and social problems, including problems with job performance and alcohol-impaired driving, according to a new study released by the University of Minnesota and the Centers for Disease Control and Prevention (CDC).  

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• 20:10 Smoking prevention campaign saving billions in smoking-related care

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  Researchers at the Johns Hopkins Bloomberg School of Public Health and the American Legacy Foundation have estimated that truth(R), the nations' largest youth smoking prevention campaign, saved $1.9 billion or more in health care costs associated with tobacco use. The results were published February 12 online by the American Journal of Preventive Medicine.  

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• 20:10 Women's cancer outcomes improved by surgical evaluation

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  Many women scheduled to undergo hysterectomy for pre-cancerous cell changes actually need a more comprehensive surgery, something they should discuss with a gynecologic oncologist, say researchers at the University of Alabama at Birmingham (UAB).  

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• 19:06 'Normalizing' tumor vessels leaves cancer more benign

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  A report publishing online on February 12th in the journal Cell, a Cell Press publication, suggests a counterintuitive new method to make cancer less likely to spread: by normalizing the shape of tumors' blood vessels to improve their oxygen supply. Such a treatment strategy might also boost the efficacy and reduce resistance to available anti-cancer drugs and so-called anti-angiogenic drugs that work by cutting off the growth of new blood vessels.  

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• 19:06 Running Hamsters Can Power Nano Devices

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  (PhysOrg.com) -- Among the vast number of untapped energy sources are finger taps, heartbeats, and even hamsters running on exercise wheels. In a recent study, researchers from Georgia Tech have shown that when hamsters run or scratch themselves - even if they do so erratically - the motions can drive a nanogenerator that produces an electric current.  

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• 18:06 Darwin Needs A Make-Over: Budget Cuts at Leiden University

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  (PhysOrg.com) -- A decision by the Dutch government to introduce "competitiveness" into the criteria for funding university research has in effect obliterated Leiden University's department of evolutionary biology. Ironically, February 12th marks the 200th anniversary of Charles Robert Darwin's birth. He laid the ground work for the study of evolutionary biology in his work, "On the Origin of the Species." Natural selection takes on many forms in the 21st century. Placing a monetary value on worthy scientific work and the race for scarce funding sources creates an artificial selection with significant implications for all species. Boards, committees and other agencies of government decide on a daily basis the funding worthiness of the species. The Netherlands Organization for Scientific Research's (NWO) competitiveness criteria is no different than its counterparts around the world.  

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• 18:06 Gaza strip families give first clue to condition causing blindness and tooth decay

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  Scientists studying an inherited condition resulting in blindness and crumbling teeth have found a single defective gene can affect both eye function and normal tooth development.  

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• 18:06 MU fitness expert creates MyActivity Pyramid to help adults exercise (Video)

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  The MyActivity Pyramid, a new fitness guide developed by a University of Missouri Extension fitness specialist, provides physical activity recommendations for adults in a fun and easy-to-understand format.  

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• 18:06 Pediatric Hodgkin's disease survivors face increased breast cancer risk

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  Women who as children got radiation treatment for Hodgkin's disease are almost 40 times more likely than others to develop breast cancer, according to findings from five institutions, including the University of Florida.  

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• 18:06 Rote memorization of historical facts adds to collective cluelessness

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  As fans of talk-show host Jay Leno's man-on-the-street interviews know, Americans suffer from a national epidemic of historical and civic ignorance. But just because most Americans know more about "American Idol" than they do about American government doesn't necessarily mean it's entirely their fault.  

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• 18:06 Scientists Discover Material Harder Than Diamond

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  (PhysOrg.com) -- Currently, diamond is regarded to be the hardest known material in the world. But by considering large compressive pressures under indenters, scientists have calculated that a material called wurtzite boron nitride (w-BN) has a greater indentation strength than diamond. The scientists also calculated that another material, lonsdaleite (also called hexagonal diamond, since it`s made of carbon and is similar to diamond), is even stronger than w-BN and 58 percent stronger than diamond, setting a new record.  

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• 18:06 The Obama effect: Researchers cite President's role in reducing racism

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  President Obama spurred a dramatic change in the way whites think about African-Americans before he had even set foot in the Oval Office, according to a new study.  

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• 17:01 Draft version of the Neanderthal genome completed

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  In a development which could reveal the links between modern humans and their prehistoric cousins, scientists said Thursday they have mapped a first draft of the Neanderthal genome. Researchers used DNA fragments extracted from three Croatian fossils to map out more than 60 percent of the entire Neanderthal genome by sequencing three billion bases of DNA.  

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• 14:50 Cell injections accelerate fracture healing

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  Long bone fractures heal faster after injections of bone-building cells. Research published in the open access journal BMC Musculoskeletal Disorders has shown that osteoblast cells cultured from a patient's own bone marrow can be injected into the fracture area and can speed the healing process.  

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• 14:50 Favorite passwords: "1234" and "password"

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  Better think twice before choosing a password for emails, online bank accounts and airline tickets.  

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• 14:50 Next generation digital maps are laser sharp

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  Restoring habitat for spawning species of fish, such as Atlantic salmon, starts with a geological inventory of suitable rivers and streams, and the watershed systems that support them. But the high-tech mapping tools available to geologists and hydrologists have had their limits.  

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• 14:50 Satellite collision raises concern over space traffic, debris

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  An unprecedented collision between a Russian and US satellite will fuel concern over the lack of traffic controls in space and the rising volumes of junk that endanger vital satellites and manned flight.  

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• 14:50 Scientists eye debris after satellite collision

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  (AP) -- Scientists are keeping a close eye on orbital debris created when two communications satellites - one American, the other Russian - smashed into each other hundreds of miles above the Earth.  

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