Tag: "pervasive" at biology news

Retroviruses shows that human-specific variety developed when humans, chimps diverged

... 1970s, when it became clear that the elements are pervasive in plant and animal genomes and that it simply made no sense that such elements would be conserved over thousands of millennia if they had no real function. McDonald said it is increasingly clear that organisms need the viral elements and that their...

Brazilian shellfish may improve understanding of ancient world

... for the life and times of the critter that was so pervasive over 250 million years ago, says David Rodland, Ph.D. student in geological sciences at Virginia Tech. He has been studying the population since July 2000. Rodland is studying the encrustation, or colonization, of the modern brachiopods by oysters, b...

World-first Australian truffle find

...are known to science, yet they are one of the most pervasive and important life forms on the continent. " The discovery came about as a result of a partnership in landscape restoration between Alcoa World Alumina Australia, Worsley Alumina Pty. Ltd., Murdoch University and CSIRO highlighting the value of a t...

Chemicals used to protect soldiers in 1991 Gulf War can damage testes, animal studies show

...lar structures." Abou Donia's team found the most pervasive cell damage within basal germ cells and spermatocytes, which give rise to mature sperm. The three chemicals combined with stress caused these cells to detach from one another, slough off, and develop holes known as "vacuoles." Such changes are well-k...

Soft drinks, teens and cavities

...ort. Unfortunately, the increased availability and pervasive marketing of soft drinks in schools has overshadowed healthy alternatives," says Dr. Shenkin. In 1977, 12- to 19-year-olds drank 16 ounces of soda a day. In 1996, this same group consumed an average of 28 ounces a day. Soda consumption has increased ...

Researchers find invasive species are healthy species They leave their parasites behind

... University. Kuris explained that parasites are so pervasive that parasitism is the most common lifestyle on Earth. Many parasites don't just make animals sick they may castrate them, change their behavior, or even kill them. By leaving parasites behind, introduced species have a strong advantage over less fi...

Theyre healthier: With fewer parasites, invaders gain competitive edge over native species

...ly attack an invading species." Parasites are so pervasive that parasitism is the most common lifestyle on earth, said Lafferty. And many parasites don't just make animals sick, they may castrate them, change their behavior, even kill them. By leaving parasites behind, introduced species may have an advantag...

SRS research highlights from the Red-Cockaded Woodpecker Symposium

... lack of sufficient prescribed burning as the most pervasive problem across the areas he surveyed. Smoke management issues, regulations, limited resources and legal challenges such as those on the Angelina and Sabine National Forest in Texas are barriers to the cycle of burning needed to maintain RCW habitat. ...

Forests of the continental U.S. continue to fragment

...ill connected over large regions, fragmentation is pervasive enough to potentially affect the ecological proces...s. "Our findings show that forest fragmentation is pervasive and extensive, with three-fourths of all forest found in or near the edges of large, heavily fragmen...

Neglect during infancy can affect children for years, scientists report

...in attention deficit disorder, mental retardation, pervasive developmental disorders, the effects of chemotherapy in brain cancer, and even head injury. "But, these kids don't look like any of those known profiles," Pollak said. Neglect in early life may also affect the body's system for handling stress, Gunn...

Fabricated microvascular networks could create compact fluidic factories

... technology. "The fabrication technique produces a pervasive network of interconnected cylindrical channels, which can range from 10 to 300 microns in diameter," said Jennifer Lewis, a professor of materials science and engineering and of chemical engineering at Illinois. "Our approach opens up new avenues fo...

Three Gorges Dam is an opportunity for ecoscience

...taintops as islands. "Habitat fragmentation is a pervasive global problem that has generally been recognized as the primary cause of the loss of biodiversity," said Wu, "yet its underlying processes and mechanisms remain poorly understood." Wu argues that because of the dam's size, the biological richness of...

Nitric oxide has important role in fever regulation, new study says

Nitric oxide, a pervasive gas involved in countless body functions, has an important role in fever regulation as well, says a Medical College of Georgia researcher. Previous studies have suggested conflicting information, including that the diffusible gas induces fever, suppr...

World's largest scientific society convenes regional meeting June 8 - 11 in Princeton, N.J.

... response when later encountered. The distinct and pervasive odors lingering in the vicinity of lower Manhattan for weeks following 9-11 were prime candidates for eliciting odor-mediated "flash-backs" among workers and residents. The researcher will identify the compounds that are commercially available and ma...

Science historians ponder naming 'enemies' in science literature

...eaning? Chew and Laubichler argue that scientists' pervasive use of metaphors to encapsulate and express scient...ies. In particular, the authors were struck by the pervasive and often casual use of the metaphorical phrase "natural enemies" to describe predator/prey and othe...

Study suggests interplay of gene, stress can predict depression

...nly to heart disease." To begin to understand this pervasive mental illness, researchers led by Moffitt and Avshalom Caspi investigated the interaction between genes and stressful events to determine if such an interaction could predict the future onset of depression. They zeroed in on the serotonin transporte...

Social mobility: Study shows bacteria seek each other out

... "It makes sense, but it's surprising that it's as pervasive as it now seems to be," said Stock. The researchers observed the gathering behavior in E. coli as well as in V. harveyi, a marine bacteria that glows when it achieves a high-density population. They found that when placed in mazes the bacteria congr...

UC Berkeley museum biologists to repeat 85-year-old Yosemite National Park wildlife survey

...rently unknown. These are not the obvious large or pervasive animals - bears, deer, owls and others - that have been the subject of previous targeted studies. Instead, the list includes a pocket mouse, two species of grasshopper mouse, six species of shrews, six species of chipmunks, and reptiles like the West...

UGA researchers use transgenic trees to help clean up toxic waste site

...oes not apply to all sites, mercury pollution is a pervasive problem in Georgia as it is elsewhere. The site of a former chemical factory near Brunswick, for example, is polluted with mercury and other toxic chemicals. Mercury contamination has been reported around the sites of former gold mines in north Georg...

Collapse of seals, sea lions & sea otters in North Pacific triggered by overfishing of great whales

...ely cited paper in Science that first demonstrated pervasive impacts of historic disturbances on ocean ecosystems. "This is the most dramatic example to date," says Jackson. "It's so counterintuitive - and reaches back beyond memory and across the entire North Pacific Ocean." "The message," says Springer, "is...

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