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Tag: "matter" at biology news

Toxic flood lifts lid on common urban pollution problem

...y of flood residue. "How we clean up this residual matter - which will not be easy - will be a chronic issue to the health of the city," he said. He said the contamination in New Orleans also highlights the need for other cities nationwide to do more to remove the toxins in urban runoff before, rather than...

'Underground' tunnels discovered as means for communication between immune system cells

...microscopic imaging system, they report that, in a matter of seconds, dendritic cells and macrophages can send waves of calcium and other small molecules to cells hundreds of micrometers away. Each nanotubule measures between 35 and 200 nanometers across - 5000 times smaller than the width of a human hair -...

Lands surface change on Alaska tundra creating longer, warmer summers in Arctic

... as the permafrost begins to melt, ancient organic matter that has been frozen for thousands of years is exposed, potentially adding more carbon dioxide to the atmosphere. The result is a positive feedback loop that could continue to raise temperatures in the region and further lengthen the snow-free perio...

Device traps, disables harmful bacteria

...ved bioaerosols -- airborne biological particulate matter -- from the air of a hospital therapy pool using a new generation of hybrid filters. The bioaerosols identified in the unnamed Midwestern hospital pool had sickened nine lifeguards who had become ill with hypersensitivity pneumonitis, a lung conditi...

Organic farms produce same yields as conventional farms

...ty, crop yields, energy efficiency, costs, organic matter changes over time, nitrogen accumulation and nitrate leaching across organic and conventional agricultural systems. "First and foremost, we found that corn and soybean yields were the same across the three systems," said Pimentel, who noted that alt...

Quantum dots provide a faster, more sensitive method for detecting respiratory viral infections

...cles of the respiratory syncytial virus (RSV) in a matter of hours, rather than the two to five days required by current tests, but it is also more sensitive, allowing it to detect the virus earlier in the course of an infection. When an RSV virus infects lung cells, it leaves part of its coat on the cell's...

UNC computer, marine scientists collaborate to predict flow of toxic waters from Katrina

...terials experts and public health officials. In a matter of hours, the University of North Carolina at Chapel Hill's Marine Sciences Program and Renaissance Computing Institute (RENCI), together with the National Center for Supercomputing Applications (NCSA), played a key role in that effort by providing r...

Scientists devise way to measure RNA synthesis on the fly in a live cell

... galaxies is affected by the presence of invisible matter called 'dark matter,'" Cluzel said. In recent yea...periments that might help them determine what dark matter is made of. "RNA molecules could be called the 'dark matter' of biology," Cluzel said. Biologists h...

Investigating 'brain shrinkage' in alcoholics

...g blocks (proteins) of the main component of white matter ?the myelin. They found that the expression of gen...dition, the content of these proteins in the white matter was reduced. These changes likely alter the structure and function of the myelin sheath and ultimate...

Study: Harmless virus kills some cancers

...of the internal and external parts of the body. No matter the type of epithelial cancer cells, when treated with AAV2, all cancer cells were dead in six days. Though previous have investigated the cancer-targeting potential of AAV2, none allowed the AAV2 to remain in culture long enough to see the effect th...

Breakthrough: Scientists create world's tiniest organic particles

...that would have destroyed far more fragile organic matter such as genes or drugs. The new method avoids harsh treatment but also allows formation of uniform particles in any shape designers choose ?spheres, rods, cones, trapezoidal solids, etc. -- and essentially any composition, he said. The relatively si...

To translate touch, the brain can quickly rearrange its sense of the body

...updates can happen very quickly, altering within a matter of seconds how body parts and individual touch sensations are perceived. The work is reported by researchers Frederique de Vignemont, Henrik Ehrsson, and Patrick Haggard at University College London. The information that is integrated in the course...

Researchers find first evidence of venom system in extinct mammal

...a specimen this old. "This just shows you that no matter how long you've been working on something, you can still learn a lot just by uncovering one little piece of information," Fox added. "And we're fortunate that we are able to work where we do; central Alberta is one of the richest areas of the world t...

Researchers extend mouse lifespan by protecting against free radicals

...rion, the cell's power plant that converts organic matter into energy. They compared the different groups of mice to a control group and found that increased production of catalase could affect the mouse lifespan. The mice with higher catalase levels in the mitochondria, dubbed the MCAT group, had about a ...

Using nanoparticles, in vivo gene therapy activates brain stem cells

...oped by the UB team can be synthesized easily in a matter of days by an experienced chemist. The UB researchers make their nanoparticles from hybrid, organically modified silica (ORMOSIL), the structure and composition of which allow for the development of an extensive library of tailored nanoparticles to ...

Depression gene may weaken mood-regulating circuit

...he depression-linked gene variant showed less gray matter and weaker connections in the mood-regulating circuit. How well the circuit was connected accounted for nearly 30 percent of their anxious temperament, researchers at the National Institute of Health's (NIH) National Institute of Mental Health (NIMH)...

NASA probe could reveal comet life, scientists claim

...SA mission, which they believe could reveal living matter in the icy layers beneath the surface of a comet. NASA's Deep Impact spacecraft will make a historic encounter with Comet Tempel-1 on 4th July, when a metre-long projectile will crash into the comet and tunnel through its outer layers, producing a c...

Asymptomatic HIV babies could use earlier treatment

...wn that early treatment of asymptomatic infants—no matter what it is—makes a big difference in preventing or delaying the progression of the disease,?said Maldonado. “Now we have to move forward to figure out if this treatment is going to be appropriate for everyone.?/p> Clinical trials are needed to de...

Atmosphere may cleanse itself better than previously thought

...rocarbons, which are produced when we burn organic matter such as wood or fossil fuels. The atmosphere has three main ways to cleanse itself of such pollutants, two of which are relatively direct: either water droplets in clouds absorb them and rain them out, or sunlight strikes them and the energy breaks t...

U.N. mulls the protection of Earth's forests

...r tornado, trees tend to stay put. "It's partly a matter of sovereign property rights," Auer said. "Governments will look at a forested area and say, 'This resource is mine. I don't want someone else telling me how to manage it.' Nevertheless, there are regional and global services provided by otherwise lo...

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