809,072 articles

Giant black hole kicked out of home galaxy

Astronomers have found strong evidence that a massive black hole is being ejected from its host galaxy at a speed of several million miles per hour. New observations from NASA's Chandra X-ray Observatory suggest that the black hole collided and merged with another black hole and received a powerful recoil kick from gravitational wave radiation.

Hands-on research

A nuzzle of the neck, a brush of the knee -- these caresses often signal a loving touch, but can also feel highly aversive, depending on who is delivering the touch, and to whom. Interested in how the brain makes connections between touch and emotion, neuroscientists at the California Institute of Technology have discovered that the association begins in the brain's primary somatosensory cortex, a...

Healthy habits can prevent disease

Five new studies provide evidence to support simple steps we can take to prevent illness and improve our overall health. In the June issue of the American Journal of Medicine, researchers report on fish consumption to reduce the risk of colon cancer; the effectiveness of hypnotherapy and acupuncture for smoking cessation; regular teeth cleaning to improve cardiovascular health; the effectiveness...

High blood caffeine levels in older adults linked to avoidance of Alzheimer's disease

Those cups of coffee that you drink every day to keep alert appear to have an extra perk - especially if you're an older adult. A recent study monitoring the memory and thinking processes of people older than 65 found that all those with higher blood caffeine levels avoided the onset of Alzheimer's disease in the two-to-four years of study follow-up. Moreover, coffee appeared to be the major or...

High-contrast, high-resolution CT scans now possible at reduced dose

Scientists have developed an X-ray imaging method that could drastically improve the contrast of CT scans whilst reducing the radiation dose. The method is based on combining the high contrast of an X-ray technique known as grating interferometry with the three-dimensional capabilities of CT. It is also compatible with clinical CT apparatus where an X-ray source and detector rotate around the...

How infectious disease may have shaped human origins

An international team of researchers, led by scientists at the University of California, San Diego School of Medicine, suggest that inactivation of two specific genes related to the immune system may have conferred selected ancestors of modern humans with improved protection from some pathogenic bacterial strains, such as Escherichia coli K1 and Group B Streptococci, the leading causes of sepsis...

How religion promotes confidence about paternity

Religious practices that strongly control female sexuality are more successful at promoting certainty about paternity, according to a study published in the current issue of the Proceedings of the National Academy of Sciences.

Investigational diabetes drug may have fewer side effects

Drugs for Type 2 diabetes can contribute to unwanted side effects, but Washington University researchers have found that in mice, an investigational drug appears to improve insulin sensitivity without side effects. The medicine works through a different pathway, which could provide additional targets for treating insulin resistance and diabetes.

JEBDP looks at connections between preventive dentistry and public health

The dental profession needs to build a stronger connection between oral health and general health -- not only for individual patients, but also at the community level, according to the special June issue of the Journal of Evidence-Based Dental Practice, the foremost publication of information about evidence-based dental practice, published by Elsevier.

June 2012 story tips from Oak Ridge National Laboratory

Windshields, windows, solar panels, eyeglasses, heart stents and hundreds of other products representing a multi-billion-dollar market are potential targets for Oak Ridge National Laboratory's thin-film superhydrophobic technology. Wireless sensors that could help the steel industry save money and reduce energy use and emissions are being put to the test at Commercial Metals Co. in Cayce, S.C.

Knowing yeast genome produces better wine

The yeast Dekkera bruxellensis plays an important role in the production of wine, as it can have either a positive or a negative impact on the taste. Researchers at Lund University in Sweden, among others, have analyzed the yeast's genome sequenced by the US Department of Energy Joint Genome Institute, giving wine producers the possibility to take control of the flavor development of the wine.

Life expectancy prolonged for esophageal cancer patients

For those with esophageal cancer, initial staging of the disease is of particular importance as it determines whether to opt for a curative treatment or palliative treatment. Research presented in the June issue of The Journal of Nuclear Medicine shows that physicians using positron emission tomography/computed tomography can discern incremental staging information about the cancer, which can...

Many physicians recommend unnecessary cancer screening for the old and sick

A significant number of physicians would recommend colorectal cancer screening for elderly patients with a severe illness, according to David Haggstrom from the Richard L. Roudebush VA Medical Center in Indianapolis in the US and his team. Such patients would not benefit from the procedure and, in fact, unnecessary screening may do more harm than good. Their work appears online in the Journal of...

Mature liver cells may be better than stem cells for liver cell transplantation therapy

Stem or progenitor cells have shown they can be cryopreserved for a long time and expanded in vitro. However, a comparison between the repopulation efficiency of immature hepatic stem/progenitor cells and mature hepatocytes transplanted into liver-injured rats concluded that mature hepatocytes offered better repopulation efficiency than stem/progenitor cells. The growth of the stem/progenitor...

Mayo Clinic IDs immune system glitch tied to fourfold higher likelihood of death

Mayo Clinic researchers have identified an immune system deficiency whose presence shows someone is up to four times likelier to die than a person without it. The glitch involves an antibody molecule called a free light chain; people whose immune systems produce too much of the molecule are far more likely to die of a life-threatening illness such as cancer, diabetes and cardiac and respiratory...

Mosquitoes fly in rain thanks to low mass

Even though a single raindrop can weigh 50 times more than a mosquito, the insect is still able to fly through a downpour. Georgia Tech researchers used high-speed videography to see how the mosquito's strong exoskeleton and low mass render it impervious to falling rain drops.

NASA looks at Typhoon Mawar, now heading to sea

Over the weekend of June 2-3, Typhoon Mawar skirted the east coast of the Philippines bringing heavy surf, heavy rainfall and gusty winds that led to several missing and injured people. NASA's TRMM satellite and Aqua satellite showed heavy rainfall and cloud extent of the storm.