Tag: "erode" at biology news

Geologist Finds Hidden Patterns Of Diversification In Ordovician Radiation

...es and mountain ranges. When thisoccurs, sediments erode into the ocean providing a plentifulsupply of new substrates and nutrients for marine organisms."That may have turned on the spigot for diversification in a bigway," said Miller. However, Miller's analysis does not support a competing theoryfor diver...

Children, Pets Who Swallow Post-1982 Pennies At Risk For Stomach Upset, EvenUlcers

... chemical processthat occurs in car batteries, can erode the stomach lining, causing an ulcer.Other U.S. coins are made of non-corrosive metals, mainly nickel, and don'tcause the problem. "The high zinc content in recently minted pennies poses a potentiallyserious problem when ingested," O'Hara sai...

Cellular espionage at play in post-menopausal osteoporosis

...sh and the decoys diminish,letting the osteoclasts erode bone. The results were published in the May 15, 1999, issue of the Journal of ClinicalInvestigation. The research was supported by grants from the NationalInstitutes of Health. Besides providing a better understanding of the cellular processes lea...

USGS studies wildfire ecology in the western United States

...prescribed fires create a smoke problem, these can erode public support for fire restoration. Continuing education is vital, he says, for people to understand that without some fire, both forests and human communities face the ever-growing danger of a major conflagration. Interior and Coastal Shrublands ...

Watershed responses to forest practices studied

...am. "As a result, changing stream flow can erode channel banks, transportmore sediment and alter the stream channels," Wigmosta said. "All of thesefactors have the potential to affect fish habitat." GISWA is an updated version of a watershed model Wigmosta developedduring his DOE-funded po...

Researchers identify enzyme essential for battle against bacteria in the intestine

...ill block theability of cells to metastasize or to erode cartilage in the leg. But thesebroad-acting compounds would inhibit matrilysin as well. Therefore, Parks thinksthe companies should try a different approach. "An important thing about thiswork is that it tells drug companies that you might not want t...

Virginia Tech teams with US Army on exercise research

...terparts during training. These types of fractures erode physical capabilities and reduce effectiveness of combat training units, essentially compromising military readiness. To combat this issue, the Army is providing a grant to Virginia Tech researchers to study the effects of specialized exercise on bo...

New method for studying ocean currents to help fight erosion

... way to map the ocean currents that erode beaches, cost coastal towns millions of dollars in annual property losses, and threaten a tourist industry worth billions. With this new method, one video camera with special ...

Marine methane consumed by consortia of bacteria

...cesium ions focused to a very small spot to slowly erode the cells for study. The probe allowed samples of the carbon from the consortia to be tested, beginning with the outer cells and then tunnelling toward the middle of the clump. Carbon isotopes were the component of interest because the percentages ...

Sea level rise threatens marshes in Chesapeake and Delaware Bays

...ition, the sediments now held by the marshes would erode into coastal waters, seriously affecting their quality. Part of this sediment consists of long sequestered carbon, and the potential collapse of hundreds of thousands of hectares [thousands of square miles] of coastal marshes in the coming decades co...

Coral layers good proxy for Atlantic climate cycles

...fill the hole to ensure nothing can get inside and erode the skeleton. The surface is finished so that within approximately six years, new coral begins to grow over the surface. They even attach a platform to the coral before they drill so that their hands do not damage the animals. "The only part of th...

Male pregnancy in seahorses may affect formation of new species

...The genetic signature of sympatric speciation will erode over time, Jones explained. So the evidence disappears. You cant rule out allopatric speciation (new species arising from geographically isolated populations) in these relatively old events. Maybe a geographic barrier disappeared. The case for sympat...

'Immortalized' cells enable researchers to grow human arteries

...ivides, the ends of its chromosomes, or telomeres, erode until they become so short that the cell receives a signal to stop growing. While at the Massachusetts Institute of Technology, current Duke researcher Chris Counter, Ph.D., had previously cloned the hTERT (human telomerase reverse transcriptase subu...

Comets spread Earth-life around galaxy, say scientists

...t collisions with interplanetary dust will quickly erode the ejected boulders to much smaller fragments and that these tiny, life-bearing fragments may be driven out of the solar system by the pressure of sunlight in a few years. The solar system could, therefore, be surrounded by an expanding 'biodisc', 3...

Mathematical rule said to be widely and wrongly used to forecast future beach erosion

...te, and different parts of a single beachfront may erode at different rates. "We advocate recognition and acceptance that we cannot actually predict shoreline retreat related to sea level rise," Pilkey said, quoting from their commentary. "It's too complex. "What startles me is why people think they can t...

More news in the battle between the sexes

...nflicts between the sexes are ubiquitous and could erode fitness. Although sexual conflict is widespread, its evolutionary consequences remain largely unknown. In the new study, which broadens our understanding of sexual selection and sexual conflict, Oliver Martin and David Hosken from the University of Z...

Continents played key role in collapse and regeneration of Earth's early greenhouse, geologists say

...ring slowed down - there was less carbonic acid to erode mountains and the mountains were becoming lower. But volcanoes were still spewing into the atmosphere large amounts of carbon from recycled oceanic crust. ''So eventually the carbon dioxide level climbs again,'' Lowe says. ''It may neve...

Two billion vulnerable to floods by 2050; number expected to double or more in two generations

...nundate small islands, flood coastal lowlands, and erode sand dunes. Upgrade monitoring of extreme events "Most urgently needed to adapt to the growing risk of flood disasters is greater global capacity to monitor and forecast extreme events," Dr. Bogardi says. "Armed with better information, s...

The telomere crisis: A crucial stage in breast cancer

...ct the chromosome ends." Eventually the DNA ends erode so much they can no longer protect the chromosomes. When this happens the chromosomes become unstable, and damage-control mechanisms kick in that kill the unstable cells. This process, known as "telomere crisis," normally protects against inappropria...

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