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Tag: "absorb" at biology news

Of mice, men, trees and the global carbon cycle

...cle. Through the process of photosynthesis, plants absorb and store more carbon dioxide than they emit through respiration. But global plant respiration is a huge variable that must be taken into account. "If we estimate the nitrogen content of plants, we can model their metabolic rates, helping us to be...

New evidence questions the simple link between prion proteins and madcow disease

...hieved. One option is that resistant people do not absorb the disease-associated prion protein (PrP) from th...e than an unmeasurably small amount of PrP left to absorb is very small," says Jeffrey. "As sheep can become infected, the theoretical probability of this be...

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

...on found in land vegetation, have less capacity to absorb atmospheric carbon than previous studies have predicted. Although some of the largest trees also grow the fastest and can take up carbon quickly, the vast majority of the Amazon trees grow slowly. "In the Central Amazon, where we found the slowes...

Scientists map one of biology's critical light-sensing structures

... when to germinate. It tells them where to grow to absorb the most light and to avoid competition. It tells them when to flower. It tells them when to die at the end of the growing season." The accomplishment of the Wisconsin researchers, including first author graduate student Jeremiah Wagner, caps a 30-y...

Dangerous tricksters: Some bacterie use immune cells to reproduce

...are effective weapons used by our immune system to absorb and digest pathogenic intruders. Some bacteria, however, can subvert this defence mechanism and even multiply within the macrophages. Cell biologists at the University of Bonn have revealed such a strategy in a recently publication in the journal 'Tr...

Seeing the forest and the trees

...in maintaining the Earth's natural mechanisms that absorb and store carbon. A new study released this week in the on-line edition of the journal Science suggests that tree diversity in tropical forests plays a crucial role in determining how much carbon these natural storehouses are able to hold, as well as...

Plants reveal a secret and bring researchers nearer a cleaner future

...nts could provide new clues by explaining how they absorb almost 100% of the sun-light reaching them, and how they transform it into other forms of energy. Researchers Michael Haumann and Holger Dau, from the Freie Universität Berlin, used the X-ray source of the European Synchrotron Radiation Facility (ES...

Plant genes identified that can form basis for crops better adapted to environmental conditions

...mystery of capillary root formation Root systems absorb nutrients and anchor plants in the soil − tw...ormation will enable the cultivation of crops that absorb water and minerals more efficiently. An important step toward a more environment-friendly, sustainab...

Scientists develop nanotech-laser treatment that kills cancer cells without harming healthy tissue

...eresting property of carbon nanotubes is that they absorb near-infrared light waves, which are slightly longer than visible rays of light and pass harmlessly through our cells," Dai says. But shine a beam of near-infrared light on a carbon nanotube, and the results are dramatic. Electrons in the nanotube be...

How 'Dirt' Could Educate The Immune System And Help Treat Asthma

...hermohaline circulation, so the ocean's ability to absorb carbon dioxide also decreases. This leaves more carbon dioxide in the atmosphere, exacerbating the problem. "At the same time, the reduced ocean circulation will decrease the ocean mixing, which decreases the ventilation to the atmosphere of carbon ...

Climate change will affect carbon sequestration in oceans, model shows

...hermohaline circulation, so the ocean's ability to absorb carbon dioxide also decreases. This leaves more carbon dioxide in the atmosphere, exacerbating the problem. "At the same time, the reduced ocean circulation will decrease the ocean mixing, which decreases the ventilation to the atmosphere of carbon ...

The right drug at the right time

...For example, CdSe quantum dots have the ability to absorb high-energy photons of ultraviolet light and re-emit them as photons of visible light. They glow different colors, depending on the size, shifting from the red to the blue end of the spectrum as the crystals get smaller. The reproducible synthesis ...

Method slashes quantum dot costs by 80 percent

...For example, CdSe quantum dots have the ability to absorb high-energy photons of ultraviolet light and re-emit them as photons of visible light. They glow different colors, depending on the size, shifting from the red to the blue end of the spectrum as the crystals get smaller. The reproducible synthesis ...

Does manganese inhaled from the shower represent a public health threat?

...imal studies, the amount of manganese people would absorb by showering 10 minutes a day. Because manganese is monitored in public water supplies, high levels of this naturally occurring metal are especially found in wells and private water supplies. Spangler and Robert Elsner, Ph.D., published their findi...

Oceans turning to acid from rise in CO2

...the oceans' chemistry will reduce their ability to absorb CO2 from the atmosphere, which in turn will accelerate the rate of global warming. "This report should sound the alarm bells around the world," remarked Chris Field, director of the Carnegie Department of Global Ecology. "It provides compelling evid...

Environmental lessons from tsunami as world's coastal population doubles

...es that healthy ecosystems are much more likely to absorb the shock and provide protection from a coastal disaster than man-made structures such as sea walls or artificial reefs. Globally 23 per cent of the world's population (1.2 billion people) live within 100 km of the coast and this figure is likely to...

UF researchers kill resistant bugs one bandage at a time

...s to grow. This treatment actually makes the gauze absorb a little more fluid, (but) it'll keep the wound cleaner because it will keep the bacteria from getting back into the wound." Clinical trials of the coating in gauze will be conducted at UF later this year. Controlling moisture and staving off infec...

Organic farms produce same yields as conventional farms

...s. The fact that organic agriculture systems also absorb and retain significant amounts of carbon in the soil has implications for global warming, Pimentel said, pointing out that soil carbon in the organic systems increased by 15 to 28 percent, the equivalent of taking about 3,500 pounds of carbon dioxide...

Fundamental discovery -- Bone fracture

...oil when the bone is stressed, helping the bone to absorb shock. When the stress is relaxed, they coil back to their original structure. The possible implications for human health are important, explained Georg E. Fantner, a UCSB doctoral student in physics and first author of the report. "The findings may...

Microscopic brain imaging in the palm of your hand

...tside the area of interest are much less likely to absorb a pair of photons simultaneously and fluoresce in response. While two-photon microscopy offers an alternative to traditional one-photon fluorescence microscopy, it still only penetrates brain tissue down to about 500-600 microns ?barely scratching ...

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