749,460 articles

New 'bouncer' molecule halts rheumatoid arthritis

Northwestern researchers have discovered why immune cells of people with rheumatoid arthritis become hyperactive and attack the joints and bones. The cells have lost their bouncer, the burly protein that keeps them in line the way a bouncer in a nightclub controls rowdy patrons. The protein, called P21, prevents immune cells from their destructive rampage. When the scientists injected a mimic of...

New record for measurement of atomic lifetime

Researchers at the Niels Bohr Institute have measured the lifetime of an extremely stable energy level of magnesium atoms with great precision. Magnesium atoms are used in research with ultra-precise atomic clocks. The new measurements show a lifetime of 2050 seconds, which corresponds to approximately ½ hour. This is the longest lifetime ever measured in a laboratory.

New type of solar cell retains high efficiency for long periods

Scientists from the University of Picardie Jules Verne and the Swiss Federal Institute of Technology are reporting development of a new genre of an electrolyte system for solar cells that breaks the double-digit barrier in the efficiency with which the devices convert sunlight into electricity. Their study appears in Journal of the American Chemical Society.

NIH stroke prevention trial has immediate implications for clinical practice

Patients at a high risk for a second stroke who received intensive medical treatment had fewer strokes and deaths than patients who received a brain stent in addition to the medical treatment, a large nationwide clinical trial has shown. The investigators published the results in the online first edition of the New England Journal of Medicine.

October 2011 Geology highlights

Topics in the October GEOLOGY include the mineralogical findings that indicate the possibility of water on Mars as recently as 2-2.5 billion years ago, instead of 4 billion years ago as previously believed; study of the 1944 Tonankai (M8.2) earthquake area by Integrated Ocean Drilling Program (IODP) Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) Expedition 316; and new EarthScope Project...

Promising target in treating and preventing the progression of heart failure identified

Researchers at Mount Sinai School of Medicine have identified a new drug target that may treat and/or prevent heart failure. The team evaluated failing human and pig hearts and discovered that SUMO1, a so-called "chaperone" protein that regulates the activity of key transporter genes, was decreased in failing hearts. When the researchers injected SUMO1 into these hearts via gene therapy, cardiac...

Researchers Discuss Challenges to Developing Broadly Protective HIV Vaccines

The human body can produce powerful antibodies that shield cells in the laboratory against infection by an array of HIV strains. In people, however, recent research shows that these broadly neutralizing antibodies are not produced in an efficient or timely enough fashion in HIV-infected individuals to effectively block progression of infection, appearing only after a person has been infected with...

Researchers publish study on neuronal RNA targeting

SUNY Downstate scientist Ilham Muslimov, MD, PhD, along with senior author Henri Tiedge, PhD, professor of physiology and pharmacology and of neurology, published a study suggesting that cellular dysregulation associated with certain neurodegenerative disorders may result from molecular competition in neuronal RNA transport pathways. The paper appeared in the Journal of Cell Biology, titled,...

Running backs take hardest hits to the head, linemen take the most

Researchers gathered data on the frequency, direction, and magnitude of head impacts from players who wore sensor-equipped helmets during three football seasons at Brown University, Dartmouth College, and Virginia Tech. The data amount to a measure of players' exposure to head impacts, which can ultimately help physicians and scientists understand how concussions occur.

Scientists offer way to address 'age-old' questions

Scientists have devised a method to measure the impact of age on the growth rates of cellular populations, a development that offers new ways to understand and model the growth of bacteria, and could provide new insights into how genetic factors affect their life cycle.

Seeing isn't believing

Pay attention! It's a universal warning, which implies that keeping close watch helps us perceive the world more accurately. But a new study by Yale University cognitive psychologists Brandon Liverence and Brian Scholl finds that intense focus on objects can have the opposite effect: It distorts perception of where things are in relation to one another. The findings will be published in an...

Simulation proven to enhance training of health professionals

An analysis by the University of British Columbia and the Mayo Clinic found that simulation-based training, such as virtual reality computers, mannequins and training models, is an effective way to teach physicians, nurses, dentists, emergency medical technicians and other health professionals.

Something new on the sun: SDO spots a late phase in solar flares

Analysis of 191 solar flares since May 2010 by NASA's Solar Dynamics Observatory (SDO) has recently shown a new piece in the pattern: some 15 percent of the flares have a distinct "late phase flare" some minutes to hours later that has never before been fully observed. This late phase of the flare pumps much more energy out into space than previously realized.

Sorting out major brain stent study: Cedars-sinai experts say procedure effective for some patients

An article appearing in the Sept. 7 New England Journal of Medicine, reporting on NIH research on brain stents, says aggressive medical treatment without stenting is better for high-risk stroke patients.But experts at Cedars-Sinai Medical Center who were involved in the study believe this procedure is appropriate for some patients. They say this study is a helpful start but not likely to be the...

South-East universities turn their knowledge into wealth

In these tough economic times, universities are under pressure to use their knowledge and discoveries to drive economic growth, but an Economic and Social Research Council (ESRC) study reveals that not all universities are equal. Universities in the greater south-east of England seem to be better than those in less competitive regions at commercialising their research and innovation.

Stroke prevention trial finds intensive medical treatment has better results than brain stenting

Patients at a high risk for a second stroke who received intensive medical treatment had fewer strokes and deaths than patients who received a brain stent in addition to the medical treatment, a large nationwide clinical trial has shown. The results were published in the online first edition of the New England Journal of Medicine. University Hospitals Case Medical Center was one of the clinical...