Wednesday, November 11, 2009

ScienceDaily: Latest Science News

ScienceDaily: Latest Science News


Star Trek-like Replicator? Electron Beam Device Makes Metal Parts, One Layer At A Time

Posted: 11 Nov 2009 11:00 AM PST

A group of engineers working on a novel manufacturing technique at NASA's Langley Research Center in Hampton, Va., have come up with a new twist on the popular old saying about dreaming and doing: "If you can slice it, we can build it." That's because layers mean everything to the environmentally-friendly construction process called Electron Beam Freeform Fabrication, or EBF3, and its operation sounds like something straight out of science fiction.

Heating, Air-Conditioning And Carpets May Be Hazardous To Your Health

Posted: 11 Nov 2009 11:00 AM PST

Damp environments, poorly maintained heating and air-conditioning systems and carpeting may contribute to poor indoor air quality, according to experts. Americans spend about 90 percent of their time indoors, where they are repeatedly exposed to indoor allergens and airborne particles that can lead to respiratory symptoms and conditions.

Discovery In Worms Points To More Targeted Cancer Treatment

Posted: 11 Nov 2009 11:00 AM PST

Researchers have found a link between two genes involved in cancer formation in humans, by examining the genes in worms. The groundbreaking discovery provides a foundation for how tumor-forming genes interact, and may offer a drug target for cancer treatment.

Surgical Masks Vs. N95 Respirators For Preventing Influenza Among Health-care Workers

Posted: 11 Nov 2009 11:00 AM PST

Surgical masks appear to be no worse than, and nearly as effective as N95 respirators in preventing influenza in health care workers, according to a new study.

New 'FinFETs' Promising For Smaller Transistors, More Powerful Chips

Posted: 11 Nov 2009 11:00 AM PST

Researchers are making progress in developing a new type of transistor that uses a finlike structure instead of the conventional flat design, possibly enabling engineers to create faster and more compact circuits and computer chips.

Avatars Can Surreptitiously And Negatively Affect User In Video Games, Virtual Worlds

Posted: 11 Nov 2009 11:00 AM PST

Although often seen as an inconsequential feature of digital technologies, one's self-representation, or avatar, in a virtual environment can affect the user's thoughts, according to new research.

Warm-blooded Dinosaurs Worked Up A Sweat

Posted: 11 Nov 2009 08:00 AM PST

Were dinosaurs "warm-blooded" like present-day mammals and birds, or "cold-blooded" like present day lizards? The implications of this simple-sounding question go beyond deciding whether or not you'd snuggle up to a dinosaur on a cold winter's evening. In a new study, researchers have found strong evidence that many dinosaur species were probably warm-blooded.

Drug Shrinks Lung Cancer Tumors In Mice

Posted: 11 Nov 2009 08:00 AM PST

A potential new drug for lung cancer has eliminated tumors in 50 percent of mice in a new study. In the animals, the drug also stopped lung cancer tumors from growing and becoming resistant to treatment. The authors of the research are now planning to take the drug into clinical trials, to establish whether it could offer hope to patients with an inoperable form of lung cancer.

High Fructose Corn Syrup: A Recipe For Hypertension, Study Finds

Posted: 11 Nov 2009 08:00 AM PST

A diet high in fructose increases the risk of developing high blood pressure (hypertension), according to ne research. The findings suggest that cutting back on processed foods and beverages that contain high fructose corn syrup may help prevent hypertension.

Drugs To Treat Anemia In Cancer Patients Linked To Thromboembolism

Posted: 11 Nov 2009 08:00 AM PST

Medications frequently given to cancer patients to reduce their risk of anemia are associated with an increased risk of deep vein thrombosis or pulmonary embolism, according to new research.

Laser-plasma Accelerators Ride On Einstein's Shoulders

Posted: 11 Nov 2009 08:00 AM PST

Using Einstein's theory of special relativity to speedup computer simulations, scientists have designed laser-plasma accelerators with energies of 10 billion electron volts (GeV) and beyond. These systems, which have not been simulated in detail until now, could in the future serve as a compact new technology for particle colliders and energetic light sources.

Scientists Decipher The Formation Of Lasting Memories

Posted: 11 Nov 2009 08:00 AM PST

Researchers have discovered a mechanism that controls the brain's ability to create lasting memories. In experiments on genetically manipulated mice, they were able to switch on and off the animals' ability to form lasting memories by adding a substance to their drinking water. The findings are of potential significance to the future treatment of Alzheimer's and stroke.

Children With Autism Show Slower Pupil Responses, Study Finds

Posted: 11 Nov 2009 05:00 AM PST

Researchers have developed a pupil response test that is 92.5 percent accurate in separating children with autism from those with typical development. In the study, the scientists found that children with autism have slower pupil responses to light change.

People With Less Education Could Be More Susceptible To The Flu

Posted: 11 Nov 2009 05:00 AM PST

People who did not earn a high school diploma could be more likely to get H1N1 and the vaccine might be less effective in them compared to those who earned a diploma, new research shows.

Inhibitor Of Heat Shock Protein Is A Potential Anticancer Drug, Study Finds

Posted: 11 Nov 2009 05:00 AM PST

Like yoga for office drones, cells do have coping strategies for stress. Heat, lack of nutrients, oxygen radicals -- all can wreak havoc on the delicate internal components of a cell, potentially damaging it beyond repair. Proteins called HSPs (heat shock proteins) allow cells to survive stress-induced damage. Scientists have long studied how HSPs work in order to harness their therapeutic potential.

Unexpected Consequences Of Proton Pump Inhibitor Use In Reflux Disease

Posted: 11 Nov 2009 05:00 AM PST

Despite being highly effective and beneficial for many patients, unexpected consequences are emerging in patients who are prescribed proton pump inhibitors for reflux diseases. Physicians are warned to monitor these effects and prescribe these medications carefully, according to a new commentary.

Upping The Power Triggers An Ordered Helical Plasma

Posted: 11 Nov 2009 05:00 AM PST

If you keep twisting a straight elastic string, at some moment it starts kinking in a wild way. Something similar occurs when one increases the electrical current flowing in a magnetized plasma doughnut: it takes on a wild helical shape, which spoils its performance. This phenomenon concerns scientists exploring fusion power, who use powerful magnetic fields to confine plasma during their experiments.

Identifying PTSD: Light Shed On Brain's Response To Distress, Unexpected Events

Posted: 11 Nov 2009 05:00 AM PST

In a new study, psychologists are able to see in detail for the first time how various regions of the human brain respond when people experience an unexpected or traumatic event. The study could lead to the creation of biological measures that could identify people with post-traumatic stress disorder or identify PTSD sufferers who would benefit from specific treatments.

Central Africa's Tropical Congo Basin Was Arid, Treeless In Late Jurassic

Posted: 11 Nov 2009 02:00 AM PST

The lush, tropical Congo Basin was much different 150 million to 200 million years ago when dinosaurs roamed Gondwana, the single continent formed by Africa and South America. Geochemical analysis of rare ancient soils from Central Africa suggests the land was arid, with a small amount of seasonal rainfall, and few bushes or trees. There's very little data for the paleoclimate of the Late Jurassic, but it's important because climate determines plant communities.

Minimally Invasive Surgery Shown Safe And Effective Treatment For Rectal Cancer

Posted: 11 Nov 2009 02:00 AM PST

Laparoscopic surgery has been used in the treatment of intestinal disorders for close to 20 years, but its benefits have only recently begun to be extended to people with rectal cancer.

Anchovy Parasite Hazard Varies Depending On Origin Of Fish, Study Finds

Posted: 11 Nov 2009 02:00 AM PST

Researchers in Spain have confirmed a higher presence of the parasite Anisakis in anchovies of the Atlantic South East coast and the Mediterranean North West coast, and they insist on freezing or cooking fish before consuming it.

Simple Questionaire Can Identify Patients At High Risk For Lung Cancer, Study Suggests

Posted: 11 Nov 2009 02:00 AM PST

A new study confirms the success of a simple questionnaire designed to identify patients at high risk of lung cancer. Initiated in 2001, the current study confirmed 18 cases of cancer of the original 430 patients who qualified as high risk after completing a five-minute questionnaire.

Implications Of Past Forecasting Errors Often Underestimated

Posted: 11 Nov 2009 02:00 AM PST

When managers issue a forecast of their firm's earnings, they do not always take into account prior forecasting errors, according to new research.

Scientists Call For Ban On Alcohol-industry Sponsorship Of Sport

Posted: 11 Nov 2009 02:00 AM PST

The alcohol industry's sponsorship of sport should be banned and replaced with a dedicated alcohol tax modeled on those employed by some countries for tobacco, say scientists.

Controversial New Climate Change Data: Is Earth's Capacity To Absorb CO<sub>2</sub> Much Greater Than Expected?

Posted: 10 Nov 2009 11:00 PM PST

New data show that the balance between the airborne and the absorbed fraction of carbon dioxide has stayed approximately constant since 1850, despite emissions of CO2 having risen from about 2 billion tons a year in 1850 to 35 billion tons a year now. This suggests that terrestrial ecosystems and the oceans have a much greater capacity to absorb CO2 than had been previously expected.

Laboratory-Grown Replacement Of Penile Erectile Tissue In Animals Suggests Potential To Benefit Patients

Posted: 10 Nov 2009 11:00 PM PST

In an advance that could one day enable surgeons to reconstruct and restore function to damaged or diseased penile tissue in humans, researchers at the Wake Forest Institute for Regenerative Medicine have used tissue engineering techniques to completely replace penile erectile tissue in rabbits. This is the most complete replacement of penile erectile tissue to date and suggests the possibility of using the same approach for men with erectile dysfunction or conditions that require reconstruction, including penile cancer and congenital abnormalities.

IUD Is Most Popular Long-acting Contraceptive Amongst Europeans

Posted: 10 Nov 2009 11:00 PM PST

A European study has defined the profile for the usage of long-acting contraceptive methods. The work shows, amongst other things, that 10 percent of women use these methods, the majority over 30 years old.

Hepatitis B Does Not Increase Risk For Pancreatic Cancer

Posted: 10 Nov 2009 11:00 PM PST

A new study found that hepatitis B does not increase the risk for pancreatic cancer -- and that only age is a contributing factor. The results contradict a previous study in 2008 that suggested a link between pancreatic cancer and previous hepatitis B infection. Hepatitis B is an inflammation of the liver caused by a viral infection.

Cell Phones Become Handheld Tools For Global Development

Posted: 10 Nov 2009 11:00 PM PST

Computer scientists are using Android, the open-source mobile operating system championed by Google, to transform a cell phone into a flexible data-collection tool. Their free suite of tools, named Open Data Kit, is already used by organizations around the world that need inexpensive ways to gather information in areas with little infrastructure.

Women More Likely Than Men To Suffer Depression After Stroke

Posted: 10 Nov 2009 11:00 PM PST

Depression occurs in as many as one-third of patients after a stroke, and women are at somewhat higher risk, according to a large new review of studies. Post-stroke depression is associated with greater disability, reduced quality of life and an increased risk of death.

Pain In The Neck: Too Much Texting Could Lead To Overuse Injuries

Posted: 10 Nov 2009 08:00 PM PST

College age students text the most, preferring it to calls or e-mail. However, new research is suggesting that the copious amounts of texting could lead to overuse injuries -- once only reserved for older adults who have spent years in front of a computer.

Aiming To Avoid Damage To Neurocognitive Areas Of The Brain During Cranial Radiation

Posted: 10 Nov 2009 08:00 PM PST

Radiation oncologists are intent on finding ways to avoid damage to the critically important hippocampus and limbic circuit of the brain when cranial radiation is required to treat existing or potential metastatic cancers.

Plentiful Poinsettias Without Plant Growth Regulators

Posted: 10 Nov 2009 08:00 PM PST

Poinsettia, a holiday favorite, is produced using plant growth regulators (PGRs) to achieve their desired height, but the high cost of PGRs, environmental use restrictions, and increasing pressure from consumers are driving researchers to explore new alternatives. Argentine researchers recently completed a study to determine if manipulation of red and far-red light ratios can be a successful alternative to the use of PGRs. Results indicate that the new approach is effective and environmentally beneficial.

Shorter Radiation Course Stops Cancer Growth In High-risk Prostate Cancer Patients

Posted: 10 Nov 2009 08:00 PM PST

Hypofractionated radiation treatment, a newer type of radiation treatment that delivers higher doses of radiation in fewer treatments than conventional radiation therapy, is significantly more effective in stopping cancer from growing in high risk patients, compared to receiving standard radiation treatment, according to a new study. In addition, findings show there is no increased risk of negative side effects later in patients who undergo hypofractionated radiation.

Researchers Hunt For New Zeolites

Posted: 10 Nov 2009 08:00 PM PST

In all the world, there are about 200 types of zeolite, a compound of silicon, aluminum and oxygen that gives civilization such things as laundry detergent, kitty litter and gasoline. But thanks to computations by researchers, it appears there are -- or could be -- more types of zeolites than once thought.

Brief Training In Meditation May Help Manage Pain, Study Shows

Posted: 10 Nov 2009 08:00 PM PST

An experimental study examining the perception of pain and the effects of various mental training techniques has found that a relatively short and simple meditation method can have a significant positive effect on pain management.

When Is A Fetus Able To Survive Outside The Womb?

Posted: 10 Nov 2009 05:00 PM PST

Mathematicians are coupling mathematical models with information about a baby's physiology inside the womb. Combining ultrasound with powerful algorithms based on real-life data, pediatricians get critical data on the development of the fetal circulatory system, so they can determine when the baby is strong enough to survive on its own.

FDA Approved Leukemia Drugs Shows Promise In Ovarian Cancer Cells

Posted: 10 Nov 2009 05:00 PM PST

The drug Sprycel, approved for use by the US Food and Drug Administration in patients with chronic myeloid leukemia, significantly inhibited the growth and invasiveness of ovarian cancer cells and also promoted their death, a new study has found.

DNA Origami Nanoscale Breadboards Developed For Carbon Nanotube Circuits

Posted: 10 Nov 2009 05:00 PM PST

In work that someday may lead to the development of novel types of nanoscale electronic devices, researchers have combined DNA's talent for self-assembly with the remarkable electronic properties of carbon nanotubes, thereby suggesting a solution to the long-standing problem of organizing carbon nanotubes into nanoscale electronic circuits.

Scientists Explain Binding Action Of 2 Key HIV Antibodies; Could Lead To New Vaccine Design

Posted: 10 Nov 2009 05:00 PM PST

A very close and detailed study of how the most robust antibodies work to block the HIV virus as it seeks entry into healthy cells has revealed a new direction for researchers hoping to design an effective vaccine.

Costs Of Plug-in Cars Key To Broad Consumer Acceptance

Posted: 10 Nov 2009 05:00 PM PST

A new survey shows widespread consumer interest in buying plug-in hybrid electric vehicles. But the cost of the cars is much more influential than environmental and other non-economic factors as a predictor of purchase probabilities.

Virtual Reality Games Could Help Bullying Victims

Posted: 10 Nov 2009 05:00 PM PST

Virtual reality games could help children to escape victimization and bullying at school, according to researchers in the UK.

Middleweight Black Hole: Swift, XMM-Newton Satellites Tune Into X-ray Source

Posted: 10 Nov 2009 02:00 PM PST

While astronomers have studied lightweight and heavyweight black holes for decades, the evidence for black holes with intermediate masses has been much harder to come by. Now, astronomers find that an X-ray source in galaxy NGC 5408 represents one of the best cases for a middleweight black hole to date.

Hundreds Of Genes Distinguish Patients Likely To Survive Advanced Melanoma

Posted: 10 Nov 2009 02:00 PM PST

Some patients can live for years with melanoma that has spread beyond the skin to other organs. Now it may be possible to identify which patients are more likely to survive by analyzing the activity of hundreds of genes involved in the immune response and gene proliferation.

Young Tennis Players Who Play Only One Sport Are More Prone To Injuries

Posted: 10 Nov 2009 02:00 PM PST

Gifted young athletes are under increasing pressure to play only one sport year round. But a new study found that such specialization increases the risk of injury in junior tennis players.

Reduced Muscle Strength Associated With Risk For Alzheimer's

Posted: 10 Nov 2009 02:00 PM PST

Individuals with weaker muscles appear to have a higher risk for Alzheimer's disease and declines in cognitive function over time, according to a new report.

Deciphering The Regulatory Code: Scientists Take New Approach To Predict Gene Expression

Posted: 10 Nov 2009 02:00 PM PST

New research by European scientists is a first step towards forecasting the expression of all genes in a given organism and demonstrates that the genetic regulation that is crucial for correct embryonic development is more flexible than previously thought.

Men Leave: Separation And Divorce Far More Common When The Wife Is The Patient

Posted: 10 Nov 2009 02:00 PM PST

A woman is six times more likely to be separated or divorced soon after a diagnosis of cancer or multiple sclerosis than if a man in the relationship is the patient, according to a study that examined the role gender played in so-called "partner abandonment." The study also found that the longer the marriage the more likely it would remain intact.

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