Tag: "net" at biology news

Scientists urge managers to limit use of destructive fishing gears

...tudy them. "The way we fish is like hanging a huge net dragged from an blimp across a forest, knocking down the trees and scooping up the plants and animals, and then throwing away everything except the deer," says Norse. The destruction of deep-sea, coldwater corals off the east and west coasts of the U...

Endothelial progenitor cells could serve as biological marker for cardiovascular disease

...rculating endothelial progenitor cells. Thus, the net damage to blood vessels and hence the risk of developing atherosclerosis depends not only on the exposure to risk factors, but also on the ability of the bone marrow-derived stem cells of endothelial origin to repair the damage. "We will need larger ...

Researchers develop 'natural bandages' that mimic body's healing process

..., the netting," Bowlin says. "It's like throwing a net over the clot that holds it together and keeps it from dissolving quickly." After the clot is formed and stabilized by the fibrin meshwork, that same meshwork sets the stage for the natural healing processes. To make the fibers, the researchers used ...

New genetic 'fishing net' harvests elusive autism gene

...ssor of medicine at Duke. This new genetic fishing net allows scientists to sift through complex genetic data and extract genetic risk factors that affect only some of the total group. In this case, when the researchers applied the new test only to those families whose children scored high in the IS cat...

Premature births soar in US, now #1 obstetric problem

...compared to $4,300 for a typical newborn stay. The net cost of health care for treatment of preterm newborns covered by employer health plans has been estimated at $4.7 billion equivalent to approximately two percent of corporate after-tax profits. On January 30th the March of Dimes will release data ...

Animal study demonstrates carbon monoxide may help heart patients

... and subsequent narrowing of the blood vessel. The net result is that blood flow is decreased and in some cases stopped altogether potentially leading to a heart attack or to organ rejection." The paradoxical idea that the poisonous gas carbon monoxide (CO) might prevent this dangerous turn of events i...

Ocean report calls for the immediate creation of marine reserves throughout the United States

...ces, it's perfectly reasonable to ask if there's a net benefit or loss," he said, "so the report allows for the possibility of an incremental move toward larger and larger reserve networks. They have to be done context of the local communities bringing the local stakeholders into the discussions about w...

Climate change surprise: High carbon dioxide levels can retard plant growth, study reveals

...percent," Shaw and her colleagues wrote. The mean net plant growth for all treatment combinations with elevated CO2 was about 4.9 tons per acre compared to roughly 5.5 tons per acre for all treatment combinations in which CO2 levels were kept normal. However, when higher amounts of CO2 gas were added t...

JCI Table of Contents, December 2, 2002

...nsatory increase in bone formation -- resulting in net bone lossand osteoporosis. The absence of estrogen leads to elevated levels of IL-7,and M. Neale Weitzmann and colleagues have examined the effects of thiscytokine on bone metabolism in ovariectomized mice. Their findings (pages16431650) suggest a cr...

UC Berkeley scientists detail neural circuit that lets eye detect directional motion

...d also veto the excitation from bipolar cells. The net effect is strong inhibition and no firing of the directionally selective ganglion cells. Also, because the inhibition from starburst cells arrives before any excitation from the bipolar cells, firing is diminished even more. "Starburst cells not only...

Artificial cell gets light-powered nanopump for calcium ions

...ns at its opposite ends in response to light. "The net result is the use of light energy to transfer calcium to the interior of the liposome," said Gust. "In lay terms, the shuttle molecule is like a taxicab that transports the calcium ion across town. The artificial reaction center is the engine that po...

Oregon power companies offset carbon through investment in Ecuadors rainforest

...resulting from climate change. The law limits the net amount of carbon dioxide that a new power plant can release. One way new plants can meet these standards is by investing in carbon offsets projects through The Climate Trust, a nonprofit organization formed in 1997 in response to the Oregon legisla...

Scientists find grass yield, carbon storage not affected by creepy-crawlies in the soil

... the soil act to cancel each other out, causing no net ecosystem effects. The Natural Environment Research Council provides core funding to the Centre for Population Biology as well as funding for this research under its Soil Biodiversity Programme....

Ion channels allow bacteria to resist stomach acid

... Miller, these "proton pumps" -- because they move net positive charge outward -- would grind to a halt unless there were some way to "leak" chloride out of the bacterial cells. "The chloride channel provides an electrical shunt or an electrical leak that allows the proton pump to keep turning over," sai...

Shadow proteins in thymus - Clues to how immune system works?

...ism to get rid of these cells. So there is a whole net of mechanisms."...

Clay sprays control HABS; disease may affect more than salmon

...got sick and died after being placed in open-ocean net pens. The occurrence puzzled scientists for several reasons. First, the salmon eggs, not salmon, were flown to Chile and the disease was believed not to be transmitted via eggs. Also, Chile had no wild salmon living off its coasts. So where did t...

Starbucks-Conservation Intl. partnership awarded at World Summit

...te sector can successfully collaborate to create a net benefit for business and the environment." The partnership between Starbucks and Conservation International began in 1998 with the creation of CI's Conservation Coffee(tm) project site in Chiapas, Mexico. Results from the partnership to date include...

Investing in environment pays off at 100-1, says paper published in Science this week

...ng to the combined results of the studies. That net loss translates to about $250 billion a year, give...s 16 biomes. For the current study, they used the net benefit of conversion - the value of the intact system minus the value of the converted system. Wh...

It pays to save: Science study shows huge economic benefits from conserving wild nature

... habitat conversion costs the human enterprise, in net terms, on the order of $250 billion that year, and...onverted ecosystem values. Despite this tally, the net benefit of conservation is generally ignored, compared to the short-term, private economic gains tha...

The effects of human-caused atmospheric changes on tropical forests

...t which respiration exceeds photosynthesis so that net production of CO2 results. Positive feedback between higher temperatures and CO2 production by tropical forests could be catastrophic by resulting in accelerated increase in global CO2 levels. Tropical forests throughout the world appear to be chang...

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