Sci/tech

To Treat Patients Doctors' Alter Own Pain Responses: Study
October 3, 2007 07:31 PM -

CHICAGO - Physicians apparently learn to “shut off” the portion of their brain that helps them appreciate the pain their patients experience while treating them and instead activate a portion of the brain connected with controlling emotions, according to new research using brain scans at the University of Chicago.

Because doctors sometimes have to inflict pain on their patients as part of the healing process, they also must develop the ability to not be distracted by the suffering, said Jean Decety, Professor in Psychology and Psychiatry at the University and co-author of “Expertise Modulates the Perception of Pain in Others,” published in the Oct. 9 issue of Current Biology and currently available on-line.

Discovery Supports Theory of Alzheimer's Disease as Form of Diabetes
October 3, 2007 07:24 PM -

EVANSTON, Ill. --- Insulin, it turns out, may be as important for the mind as it is for the body. Research in the last few years has raised the possibility that Alzheimer's memory loss could be due to a novel third form of diabetes.

Now scientists at Northwestern University have discovered why brain insulin signaling -- crucial for memory formation -- would stop working in Alzheimer's disease. They have shown that a toxic protein found in the brains of individuals with Alzheimer's removes insulin receptors from nerve cells, rendering those neurons insulin resistant. (The protein, known to attack memory-forming synapses, is called an ADDL for “amyloid ß-derived diffusible ligand.”)

With other research showing that levels of brain insulin and its related receptors are lower in individuals with Alzheimer's disease, the Northwestern study sheds light on the emerging idea of Alzheimer's being a “type 3” diabetes.

Physicists Tackle Knotty Puzzle
October 3, 2007 07:20 PM -

San Diego, California - Electrical cables, garden hoses and strands of holiday lights seem to get themselves hopelessly tangled with no help at all. Now research initiated by an undergraduate student at the University of California, San Diego has resulted in the first model of how knots form.

The study, published this week in the journal Proceedings of the National Academy of Sciences, investigated the likelihood of knot formation and the types of knots formed in a tumbled string. The researchers say they were interested in the problem because it has many applications, including to the biophysics research questions their group usually studies.

Japan Looks to Batteries to Clean Up Cars
October 3, 2007 07:10 AM - Reuters

TOKYO - Achieving a breakthrough in battery technology is the key to tackling pollution caused by cars and sustaining a rapid growth in car ownership worldwide, an official at the Japanese automakers' lobby said.  An estimated 700 million cars are on the road today and this is expected to double "in no time" given rapid motorization in China, India and other emerging markets, said Minoru Taniguchi, head of the environment department at the Japan Automobile Manufacturers Association.

New method could advance development of hydrogen-fueled cars
October 2, 2007 09:29 PM - UCLA News

Los Angeles, California - Researchers at the UCLA Henry Samueli School of Engineering and Applied Science have developed a model that could help engineers and scientists speed up the development of hydrogen-fueled vehicles by identifying promising hydrogen-storage materials and predicting favored thermodynamic chemical reactions through which hydrogen can be reversibly stored and extracted.

The new method, published online in the peer-reviewed journal Advanced Materials, was developed by Alireza Akbarzadeh, a UCLA postdoctoral researcher in the department of materials science and engineering; Vidvuds Ozolins, UCLA associate professor of materials science and engineering; and Christopher Wolverton, professor of materials science and engineering at Northwestern University in Illinois.

Ancient Fossils Points to Carbon Dioxide As a Driver of Global Warming
October 2, 2007 12:37 PM -

PASADENA, Calif.--A team of American and Canadian scientists has devised a new way to study Earth's past climate by analyzing the chemical composition of ancient marine fossils. The first published tests with the method further support the view that atmospheric CO2 has contributed to dramatic climate variations in the past, and strengthen projections that human CO2 emissions could cause global warming.

In the current issue of the journal Nature, geologists and environmental scientists from the California Institute of Technology, the University of Ottawa, the Memorial University of Newfoundland, Brock University, and the Waquoit Bay National Estuarine Research Reserve report the results of a new method for determining the growth temperatures of carbonate fossils such as shells and corals. This method looks at the percentage of rare isotopes of oxygen and carbon that bond with each other rather than being randomly distributed through their mineral lattices.

 

Some Cattlemen Nervous About New Biolab
October 2, 2007 08:09 AM - Suzanne Gamboa -Associated Press

The spread of a deadly livestock disease from a laboratory in Britain has not stopped U.S. officials from considering where to build a new animal disease research lab in this country.

The Aug. 3 outbreak of foot-and-mouth disease in Britain was tied to a government laboratory and a private vaccine manufacturer in Pirbright, England. Initial tests show a second outbreak, which is still under investigation, was the same strain as the lab-related outbreak.

Killer Amoeba Blamed for Six Deaths
October 1, 2007 03:50 PM - Chris Kahn, AP, Lisa Vorderbruggen, Contra Costa Times / MCT

PHOENIX (Sept. 29) — It sounds like science fiction but it's true: A killer amoeba living in lakes enters the body through the nose and attacks the brain where it feeds until you die.
 
Even though encounters with the microscopic bug are extraordinarily rare, it's killed six boys and young men this year. The spike in cases has health officials concerned, and they are predicting more cases in the future.

"This is definitely something we need to track," said Michael Beach, a specialist in recreational waterborne illnesses for the Centers for Disease Control and Prevention.

"This is a heat-loving amoeba. As water temperatures go up, it does better," Beach said. "In future decades, as temperatures rise, we'd expect to see more cases."

Ground search resumes for adventurer Fossett
September 30, 2007 04:33 PM - William Albright, Reuters

RENO (Reuters) - Search teams on foot, horseback and all-terrain vehicles resumed their quest on Sunday in western Nevada for millionaire adventurer Steve Fossett, missing since taking off alone in a small plane on September 3.

The ground search, now in its second day, focused on a patch of rugged terrain identified by U.S. Air Force radar analysis as an area where Fossett's aircraft was likely to have gone down, said Gary Derks, a state Department of Public Safety official overseeing the operation.

Speaking to Reuters by telephone from the command center in Nevada's capital, Carson City, Derks said the teams were expected to finish covering the search area of roughly 50 to 60 square miles by nightfall.

Wasp Study Suggests Altruism Evolved From Maternal Behavior
September 29, 2007 07:29 PM - Diana Yates, University of Illinois

CHAMPAIGN, Ill. — Researchers at the University of Illinois have used an innovative approach to reveal the molecular basis of altruistic behavior in wasps. The research team focused on the expression of behavior-related genes in Polistes metricus paper wasps, a species for which little genetic data was available when the study was begun. Their findings appear today online in Science Express.

Like honey bee workers, wasp workers give up their reproductive capabilities and focus entirely on nurturing their larval siblings, a practice that seems to defy the Darwinian prediction that a successful organism strives, above all else, to reproduce itself. Such behaviors are indicative of a eusocial society, in which some individuals lose, or sacrifice, their reproductive functions and instead work to benefit the larger group.

First | Previous | 378 | 379 | 380 | 381 | 382 | Next | Last