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Worldwide, Life Expectancy Has Gone Up Over 6 Years Since 1990

Though deaths due to drug use and hepatitis C have gone up, falling death rates due to cancer and...

For Airline Pilots, Radiation On The Job Is As Much As Tanning Beds

Airline pilots can be exposed to the same amount of UV-A radiation as if they visited a tanning...

Curiosity Detects Spike In Methane, And Other Organic Molecules, On Mars

In 2009, researchers detected methane on Mars, suggesting the planet may be biologically or geologically...

In A Real World Test, 49 Percent Of Patients Don't Want Health Care Providers To Have Their Info

In an era where hackers can easily hack into department store credit card records or Sony Corporation...

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Bacteria save energy by producing proteins that moonlight, having different roles at different times, which may also protect the microbes from being killed. The moonlighting activity of one enzyme from the tuberculosis bacterium makes it partially resistant to a family of broad-spectrum antibiotics, according to a paper published in the September issue of the journal Microbiology.

"Glutamate racemase, or MurI, is an enzyme that bacteria use to make the building blocks of cell walls," said Professor Valakunja Nagaraja from the Indian Institute of Science in Bangalore, India. "MurI from Mycobacterium tuberculosis also stops the enzyme DNA gyrase from working, which in turn stops DNA replication and cell division."

The researchers found that the two different functions work independently of one another - the enzyme's ability to make cell wall components does not affect its ability to inhibit DNA gyrase and vice versa.

Scientists know that Salmonella and E. coli O157, a strain of E. coli that can cause serious sickness in humans, can spread to salads and vegetables if they are fertilized with contaminated manure, irrigated with contaminated water, or if they come into contact with contaminated products during cutting, washing, packing and preparation processes. However, until now, scientists did not understand how the pathogens managed to bind to the leaves.

In new research presented today at the 21st International ICFMH Symposium 'Food Micro 2008' conference in Aberdeen, a new study shows how some Salmonella bacteria use the long stringy appendages they normally use to help them 'swim' and move about to attach themselves to salad leaves and other vegetables, causing contamination and a health risk.

A man's height is a marker for risk of prostate cancer development but is more strongly linked to progression of the cancer, say a group of British researchers who conducted their own study and also reviewed 58 other published studies.

In the September issue of Cancer Epidemiology, Biomarkers & Prevention, 12 researchers at four universities in England who studied more than 9,000 men with and without prostate cancer estimated that the risk of developing the disease rises by about six percent for every 10 centimeters (3.9 inches) in height a man is over the shortest group of men in the study.

That means a man who is one foot taller than the shortest person in the study would have a 19 percent increased risk of developing the disease.

Seriously.

Stanford computer scientists have developed an artificial intelligence system that enables robotic helicopters to teach themselves to fly difficult stunts by watching other helicopters perform the same maneuvers.

The result is an autonomous helicopter than can perform a complete airshow of complex tricks on its own.

The stunts are "by far the most difficult aerobatic maneuvers flown by any computer controlled helicopter," said Andrew Ng, the professor directing the research of graduate students Pieter Abbeel, Adam Coates, Timothy Hunter and Morgan Quigley.


Researchers using two abundant and relatively inexpensive elements, titanium and silicon, have grown wires into a two-dimensional network of branches that resemble flat, rectangular netting, Boston College assistant professor of chemistry Dunwei Wang and his team report in the international edition of the German Chemical Society journal Angewandte Chemie.

By creating nanonets, the team conquered a longstanding engineering challenge in nanotechnology: creating a material that is extremely thin yet maintains its complexity, a structural design large or long enough to efficiently transfer an electrical charge.


The grapevine (Vitis vinifera) is a widely cultivated crop that has been subjected to intensive breeding since the Neolithic period (from ~10,500 to ~6,000 years ago). The domestication of grapevine has undergone a selection for traits important for its cultivation and usage.

The recent publication of the complete grapevine genome has opened the possibility for an in-depth analysis of its content. This sequencing has shown that genes constitute only a very small proportion of complex genomes, with repetitive sequences and (in particular) mobile genetic elements or transposons making up a much larger part. Although transposition is a highly mutagenic event and genomes have developed very efficient mechanisms to control it, transposons have played a major role in the evolution of complex genomes.