Tag: "pressures" at biology news

Organic and sustainable foods have more polyphenolics linked to health benefits

...ition in the form of fertilizers and external pest pressures because of the lack of pesticides and herbicides," she said....

Gene mutation exacerbates eye defect in inherited glaucoma

...r," he said. "This can be a painful condition with pressures high enough to tear the cornea and risk loss of vision." One puzzle confronting researchers, said John, is that some infants with the inherited condition can suffer serious glaucoma, while others either show delayed effects or none at all. "So, alth...

Researchers identify new gene mutation in glaucoma

...r," he said. "This can be a painful condition with pressures high enough to tear the cornea and risk loss of vision." One puzzle confronting researchers, said John, is that some infants with the inherited condition can suffer serious glaucoma, while others either show delayed effects or none at all. "So, alth...

A new way to compare human and other primate genomes

...- in order for mutations and the lack of selection pressures to cause the nonfunctional sequences in the two genomes to drift apart. For example, mice and humans last shared a common ancestor about 75 million years ago, plenty of time for the nonfunctional sequences in their respective genomes to go their sepa...

Bugs from the deep may be window into the origins of life -- on earth and beyond

.... There, temperatures reach up to 60 degrees C and pressures are nearly 250 times as high as on the surface. Th... seafloor. These deposits are solid under the high pressures and low temperatures at the seafloor. If that pressure were reduced or the temperature increased, ho...

Rutgers explorer describes sea floor hot springs as teeming with valuable minerals and microbes

...y hostile environment. Sea water is corrosive; the pressures are huge. It's analogous to exploring outer space in terms of a hostile and alien environment," he said. "We are only beginning to discover the immense richness and diversity of sea floor resources." The public will have an opportunity to view Rona'...

Expanding the genetic code: the worlds first truly unnatural organism

...racing the organisms -- exposing both to selective pressures at the same time and watching their development -- the researchers hope to see if the organism with the expanded genetic code has an evolutionary advantage over natural organisms. A number of scientists have previously added unnatural amino acids to ...

Exercise and recreation for people with mobility impairments

...mputations, which measured compressive and suction pressures on the residual limbs as they walked. Vacuum-assisted sockets drove less fluid out of the limb during stance (less compression) and drew more fluid in during swing (greater suction). Paper lends insight as to why the vacuum-assisted socket prevents t...

Effects of global warming already being felt on plants and animals worldwide

...ature rise in combination with other environmental pressures "could easily disrupt the connectedness among species" and possibly lead to numerous extinctions. Swallows, geraniums and spruce In their analysis, Root and her co-workers revealed that nearly 1,200 species - roughly 81 percent of the total number ...

Scripps Institution researchers develop new approach for designing marine reserves

...more than 30 species of marine mammals. Fishing pressures in the Gulf of California have been well publicize...hich earlier this year described extensive fishing pressures on this "exhausted" sea. "The conservation and management of marine ecosystems need to be well d...

Bush signs; ozone treatment for ballast water; wetland restoration template goes national

...25 miles of the coast, population growth and other pressures are increasing demands on the California coast. Trained, experienced professionals are needed for all aspects of coastal management. USC Sea Grant is convening a one-day workshop aiming to encourage broad exploration of ways to meet current and futur...

Fiery ice from the sea

...orm of methane gas and pure water that exists when pressures are sufficiently high, or temperatures sufficientl...rt. Its crystalline form will change to gas when pressures are lowered, or temperatures rise (like when it's brought to the sea surface) and in doing so it wil...

UCLA study shows water reclamation could become an important source of future water supplies

...mount of material out of landfills, our population pressures and economic growth will require significant changes in the way we view and handle garbage if we're to continue making progress in reducing the amount of materials landfilled," Carlson wrote....

For elephants, its not just their ears and trunk that make them unique on land

...keling at any substantial depth creates very large pressures around the animal's lung. In spite of these very large pressures around the lungs, alveolar pressure is essentially atmospheric, because the lung is connected to the...

Mother (nature) knows best

...seems to significantly decrease the systolic blood pressures of SHRs at three and six months. The concurrent ingestion of linoleic acid seemed to be inversely related to elevated blood pressure levels. The memory of Spontaneously hypertensive rats (SHRs) at three, four, and five months were assessed with a m...

Study identifies hypertension patients who can benefit from the little used diuretic amiloride

... capacity may be one reason for the elevated blood pressures observed today in the descendants of these original survivors. The Study Recently, a team of Alabama researchers, led by James K. Bubien Ph.D., has utilized state of the art electrophysiological technology to identify individuals with a specific ...

'Obesity sleuths' find chronic diseases linked to behavior contrary our DNA

...tension: Tests found that inactivity led to blood pressures in sedentary individuals being substantially higher than in those who were active. Stroke: Physical activity lowers blood pressure, facilitates weight loss, and decreases the chance for Type 2 diabetes, a major cause of strokes. Metabolic Disease...

Study offers a rare view of how species interactions evolve

...This kind of variation in coevolutionary selection pressures across a broad area may be an important factor shaping the genetic structure of species and the ecological dynamics of natural communities, Thompson said. "Ecologists have tended to study species interactions at the local level, but these results ar...

Hot polymer catches carbon dioxide better

...also allows the membrane to be effective at higher pressures than conventional membranes....

Extreme climate variance sped extinction of local butterfly populations, researchers say

...1971." The drastic differences in rainfall created pressures the checkerspots simply could not overcome, she says. "Population extinction in these insects can happen very fast - in a matter of decades - if you have high variation in rainfall." The Jasper Ridge checkerspots weren't the last checkerspots on Eart...

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