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Tag: "carbon" at biology news

CO2 sensing proves critical for fungal pathogens to adapt to life in air and human hosts

...re reporting new work that offers insight into how carbon dioxide (CO2) governs the morphogenic changes that allow pathogenic fungi to survive in different environments and invade the human body, and they provide new evidence for how CO2 sensing and metabolism utilize evolutionarily conserved enzymes to con...

Logging doubles threat to the Amazon, rivaling clear-cutting, study suggests

...represents roughly 10 to 15 million metric tons of carbon removed from the ecosystem, according to the autho...sents a 25 percent increase in the overall flow of carbon from the Amazonian forest to the atmosphere. Logging causes major ecological disruptions as well. V...

Scientists must offer solutions for conserving tropical forests in a rapidly changing world

... caused by large-scale drivers, such as increasing carbon dioxide in the atmosphere, intense droughts, or other poorly understood phenomena. Wright, who has studied tropical forests and its plant and animal inhabitants since the late '70 at STRI, encourages tropical scientists to conduct assessments based ...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...cluding formaldehyde, methane, sulphur dioxide and carbon monoxide and dioxide," Burrows remembers. "Back when we were starting out, many people thought it would be impossible to get any useful results out of the troposphere. There are many important issues to deal with, such as cloud cover and the highly v...

War on terror meets war on cancer

...Colombia, Bolivia or Ecuador. Similar analysis of carbon isotopes in heroin and chemicals used to process i...through urine, and additional oxygen-18 is lost as carbon dioxide is exhaled. The person gradually regains normal levels of the common isotopes oxygen-16 and ...

University of Delaware researchers develop cancer 'nanobomb'

...re the result of work over the past two years with carbon nanotubes, which are atoms of carbon arranged in tubular form. Originally, he said, the research team was looking at the use of the ca...

Seaweed yields new compounds with pharmaceutical potential

..."These molecular structures are curious in the way carbon atoms are attached," Kubanek said. "It's very unusual. They represent a new category of organic molecules. It's exciting as a biochemist to observe that living organisms have evolved the ability to synthesize such unique and exotic structures compare...

Nanoparticles, nanoshells, nanotubes: How tiny specks may provide powerful tools against cancer

...26) A biochemist and an engineer have used tiny carbon nanotubes and monoclonal antibodies to detect canc...d his co-workers coated the surface of microscopic carbon nanotubes with a monoclonal antibody. The antibodies ?so-called guided missiles that home in on targ...

Storing carbon to combat global warming may cause other environmental problems, study suggests

Growing tree plantations to remove carbon dioxide from the atmosphere to mitigate global war... plantations are increasingly grown for biological carbon sequestration," the 10 authors wrote in a paper published in the Friday, Dec. 23, 2005, issue of the...

Bugs expose underground carbon traffic system 10 times more important than fossil fuel burning

The flow of carbon through soil is ten times greater than the amount of carbon moved around by the burning of fossil fuel but until now how this happens was at best poorly underst...

Overfishing may drive endangered seabird to rely upon lower quality food

...rs they sampled were obtained. Measures of stable carbon and nitrogen isotopes ?derived from food ingested ...s such as krill, are signaled by greater levels of carbon isotopes. "It takes about 70 to 80 krill to equal the energy value of one sardine," said Beissinger...

ORNL leading effort to help harness power of Shewanella

... warming by controlling the cycling of atmospheric carbon dioxide. ...

How E. coli bacterium generates simplicity from complexity

...ctron acceptors. To their surprise, no matter what carbon source it ingests or electron acceptor used, E. coli exhibits only six distinct functional states. "This study gives a systems biology view of how a phenotype, or a 'network state' advantageous to a microorganism is comprised of a tiny subset of a m...

Seal rookeries could provide a reliable food source for endangered California condors, study finds

...s diet can be determined by measuring the ratio of carbon and nitrogen isotopes that accumulate in its body. For example, seals and sea lions are more enriched in heavy nitrogen-15 and carbon-13 than terrestrial wildlife, such as deer. Feathers and bones In 2002, Chamberlain and his colleagues embarke...

Microbes under Greenland Ice may be preview of what scientists find under Mars' surface

...gens might instead take in subsurface hydrogen and carbon dioxide to make the methane, he said. If methanogens are responsible, Price calculated that they would occur in a concentration of about one microbe per cubic centimeter at a depth of several hundred meters, where the temperature - about zero degree...

Group proves it's possible to grow new lung alveoli by growing new blood vessels

...epithelial and endothelial tissues into the blood; carbon dioxide diffuses from the blood into the alveoli. In an infant's underdeveloped lungs, the alveoli are larger and fewer and there are fewer developed capillaries. It's a condition that leaves them gasping--and one that is shared by people who have em...

Amazon trees much older than assumed, raising questions on global climate impact of region

...or the role the Amazon plays in determining global carbon dioxide levels. Carbon dioxide is a greenhouse gas...Amazon forests, which contain about a third of all carbon found in land vegetation, have less capacity to absorb atmospheric carbon than previous studies have...

Asleep in the deep: Model helps assess ocean-injection strategy for combating greenhouse effect

... ocean. But there are pitfalls in that plan. The carbon dioxide can rise toward the surface, turn into gas... experiments have been done to investigate how the carbon dioxide (CO2) actually would behave, but such experiments are too costly and time consuming to carry...

Odd energy mechanism in bacteria analyzed

...ould die, and plays a major role in the cycling of carbon on Earth. These bacteria may have been thriving fo...e numbers SAR11 plays a major role in the planet's carbon cycle as a consumer of organic carbon. Its main energy generating system is the respiration of organ...

Poison + water = hydrogen. New microbial genome shows how

..., remove all the oxygen, mix in a bit of poisonous carbon monoxide, and add a pinch of hydrogen gas. It sou...of Kunashir, this microbe lives almost entirely on carbon monoxide. While consuming this normally poisonous gas, the microbe mixes it with water, producing hy...

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