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Tag: "absorb" at biology news

Envisat captures first image of Sargassum from space

...ing vegetation, such as phytoplankton and seaweed, absorb atmospheric carbon dioxide through photosynthesis and convert it into organic carbon. By absorbing half of the carbon dioxide emitted into the atmosphere, the oceans have a profound influence on climate, making them major areas of interest for climat...

Dirty snow may warm Arctic as much as greenhouse gases

...ed snow is darker than natural snow. Dark surfaces absorb sunlight and cause warming, while bright surfaces ...ficantly darker than the snow. The darker surfaces absorb sunlight more rapidly than snow, causing additional warming. This cycle causes temperatures in the p...

Scientists close in on missing carbon sink

...d level. The models indicate that northern forests absorb about 2.4 billion tons per year. However, ground-b...n. The aircraft samples show that northern forests absorb only 1.5 billion tons of carbon a year, which is almost 1 billion tons less than the estimate produc...

Arctic ice retreating more quickly than computer models project

..., darker areas of open water, which are expanding, absorb sunlight and increase temperatures. This feedback loop has played a role in the increasingly rapid loss of ice in recent years, which accelerated to 9.1 percent per decade from 1979 to 2006 according to satellite observations. ...

Scientists see DNA get 'sunburned' for the first time

...ent absorption is based on the idea that molecules absorb light at specific wavelengths, and it allows resea...during the extremely brief time required for it to absorb UV light. Either two thymine bases are lined up in just the right way to bond when the UV hits, or t...

Tundra disappearing at rapid rate

...the land surface declines because coniferous trees absorb more sunlight than the tundra. This light energy is then re-emitted to the atmosphere as heat. This sets up a "positive feedback," the same process that is associated with the rapidly decaying Arctic ice cap. "These results are very relevant to t...

Tropical forests -- Earth's air conditioner

Planting and protecting trees—which trap and absorb carbon dioxide as they grow—can help to remove car...o reflect sunlight by producing clouds, or help to absorb it by shading snowy tundra." Forests in colder, sub-polar latitudes evaporate less water and are ...

NASA predicts nongreen plants on other planets

...rganisms that live in different light environments absorb the light colors that are most available. For example, there is a type of bacteria that inhabit murky waters where there is little visible light, and so they use infrared radiation during photosynthesis. Scientists have long known that the chloro...

New study sheds light on 'dark states' in DNA

...-- the building blocks of DNA and RNA -- when they absorb ultraviolet (UV) light. This is the first time sc...orption, which is based on the idea that molecules absorb light at specific wavelengths, and allows them to study events happening in less than a picosecond. ...

Wheat can fatally starve insect predators

...rvae's chitin-rich mid-gut lining so that it can't absorb nutrients from the plant, causing the insects starve, Williams said. Some Hessian fly larvae, which are called virulent, are capable of ridding their bodies of lectin and surviving. Avirulent larvae are unable to deactivate the lectin. However,...

Custom-made cancer cell attacks

...ces of energy, Somerville said, noting that plants absorb atmospheric carbon dioxide during photosynthesis, which compensates for the CO2 that is released when biofuels burn. Environmental costs Some environmentalists criticize the use of biofuels by arguing that planting large quantities of corn or...

Cellulosic ethanol: Fuel of the future?

...ces of energy, Somerville said, noting that plants absorb atmospheric carbon dioxide during photosynthesis, which compensates for the CO2 that is released when biofuels burn. Environmental costs Some environmentalists criticize the use of biofuels by arguing that planting large quantities of corn or...

Nanotechnology shows promise as next wrinkle fighter

...yers. "The wrinkle-free films will automatically absorb or deflect the stress and stay flat, just as they are after formation," he said. Nanoparticle films wouldn't be a face-lift itself, but Ilsoon sees the possibility in a film that could be added during a cosmetic procedure ?such as an eyelift ?to...

Making mice with enhanced color vision

...mals in that they have three visual receptors that absorb short (blue), medium (green) and long (red) wavele...ns explains. "For example, one photoreceptor might absorb green light only half as efficiently as red light. If an animal had only this type of photoreceptor...

'Terror bird' arrived in North America before land bridge, study finds

...inction." When an animal dies, its porous bones absorb groundwater as they fossilize. As the local groundwater conditions change, the rare earth elements' concentrations change, resulting in a unique chemical signature. "We used rare earth elements because they're highly specific to certain time perio...

Unique tomatoes tops in disease-fighting antioxidants

...oes, most of it is in a form that the body doesn't absorb well," said Steven Schwartz, the study's lead author and a professor of food science and technology at Ohio State University. "The people in the study actually consumed less lycopene when they ate sauce made from the orange tomatoes, but they abso...

Cells selectively absorb short nanotubes

...ess of the concentration levels, the cells did not absorb between about one-fourth and one-third of the SWCNTs in the solutions. Further examination of the results revealed that only short nanotubes made it into the cellular interior. In the next phase of the research, the team exposed the cells to sorte...

T-ray breakthrough could make detecting disease far easier

...ting and analysing chemicals by analysing how they absorb T-rays fired at them. This would allow quality control of prescribed drugs and detection of explosives to be carried out more easily, as many complex molecules have distinctive signatures in this part of the electromagnetic spectrum. T-ray a...

Researchers link ocean organisms with increased cloud cover and potential climate change

...reasing the number of sulfate particles, which can absorb moisture and form cloud droplets. When oxidized, isoprene may enhance the effect of DMS by increasing the number and size of the particles while helping them to chemically attract more moisture. The impact of isoprene on atmospheric particulate mat...

Molecules in blood foretell development of preeclampsia

...theory holds that, when the placenta isn't able to absorb sufficient oxygen from the mother's blood, it begins secreting both sFlt1 and soluble endoglin into the mother's bloodstream. The sFlt1 binds to VEGF and PlGF and soluble endoglin binds TGF beta, diverting the compounds from the mother's blood vesse...

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