Brightsurf Science News & Current Events

March 21, 2003
Fire frequency determines forest carbon storage
Scientists studying trees ranging from saplings to 130 years old in Canada's northern forests have discovered that the period since a fire last swept through an area determines how much carbon the forest can store.

New NCAR analysis sheds light on the northern hemisphere's springtime ozone peak
Scientists at the National Center for Atmospheric Research and colleagues at universities and NASA have clarified the process by which ozone--an essential shield in the stratosphere, but a pollutant at lower levels--reaches its peak abundance across North America each spring.

Scan visualises poor memory in the elderly
Dutch psychologists have found that elderly persons with a poor memory demonstrate less activity in the mediotemporal lobe when storing new information than elderly persons with a normally functioning memory.

Concrete less sensitive for cracks than previously thought
Reinforced high-strength concrete can crack due to stresses that develop during the hardening process.

Mayonnaise as model for solid plastics
Six researchers from the University of California at Santa Barbara and one at Helsinki University of Technology in Finland report in the March 21

Treatment for minor depression
In a new approach to research on minor depression, the National Institutes of Health (NIH) has launched a four-year study to determine the safety and effectiveness of St.

Computer calculates when reinforced concrete will rust
Dutch researchers have developed a computer model that calculates the rate at which salt and moisture penetrate reinforced concrete.

Nano-sediment highways in catalyst
Dutch chemists have visualised how the porous structure of a zeolite catalyst depends on the production method.

High school students to discover tiny miracles
In a presentation that reveals the impact of nanotechnology on our daily lives, the National Science Foundation's Art Ellis will be bringing hands-on nanotech exploration to the students of Banneker High School in Washington, D.C.

'Green' car tyre produced
Dutch technologists have carried out research into a more environmentally friendly car tyre.

Pittsburgh study finds obesity surgery most successful when done by the most experienced surgeons
The risk of complications following gastric bypass surgery for obesity is significantly lower when performed by a surgeon with greater experience in the procedure, according to a University of Pittsburgh study.

NCAR's data archives reach the one-petabyte stratosphere
With the help of an innovative storage system, the National Center for Atmospheric Research (NCAR) has surpassed the one-petabyte mark in its data holdings, which range from satellite, atmosphere, ocean, and land-use data to depictions of weather and climate from prehistoric times to the year 2100 and beyond.

The hormone ethylene is necessary for plant resistance
Dutch phytopathologists have shown that ethylene is vital for the protection of plants against bacteria and fungi.
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