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Tag: "decrease" at biology news

VCU study shows hormone-like molecule kills cells that cause inflammation in allergic disease

...sed, and again, researchers observed a significant decrease in mast cell numbers due to the excess of IFNγ. When researchers tried to culture mast cells from the bone marrow of these mice, the mast cells died. Furthermore, a separate strain of mice with the same mutation as the first strain, but that h...

Can our genes tell the story of our divergence?

...ring genetic changes that increase cell number and decrease cell death), and the need for the organism to avoid cancer. Future studies will have to determine whether these explanations - of an evolutionary arms race - prove plausible. We're a long way from understanding why we're so different from our closes...

Environmental chemical cocktail may sabotage sperm

...such environmental compounds might contribute to a decrease in human fertility. Other scientists have investigated the negative impact of environmental chemicals on testis function, resulting in reduced numbers of sperm being produced, but these effects require much larger doses than we have used. As far as I...

Stem cells grown in lab mirror normal developmental steps

... up to five times greater than today, with a sharp decrease and then stabilization to near modern day levels between 34 - 25 million years ago. During the early part of the Paleogene Period, from 65 - 34 million years ago, global climates were much warmer than today with very little ice present at the poles....

Invasive parasite destroying fish species

... up to five times greater than today, with a sharp decrease and then stabilization to near modern day levels between 34 - 25 million years ago. During the early part of the Paleogene Period, from 65 - 34 million years ago, global climates were much warmer than today with very little ice present at the poles....

Deep sea algae connect ancient climate, carbon dioxide and vegetation

... up to five times greater than today, with a sharp decrease and then stabilization to near modern day levels between 34 - 25 million years ago. During the early part of the Paleogene Period, from 65 - 34 million years ago, global climates were much warmer than today with very little ice present at the poles....

It's electric: Cows show promise as powerplants

...n some of these trials well over 30 days without a decrease in the voltage output," Christy said. "Both studies suggest that cow waste is a promising fuel source. It's cheap and plentiful, and it may someday be a useful source of sustainable energy in developing parts of the world." While the source of energ...

Ocean climate predicts elk population in Canadian Rockies

...al Sciences. Cold, wet weather alone is enough to decrease an elk population, but when wolves are added to the environment, elk become especially vulnerable. Hebblewhite found that the combination of positive NPO values and wolf predation were related to 50 per cent declines in the elk population. Hebblewhi...

New miniaturised chip dramatically reduces time taken for DNA analysis

...ntify the source of infection for Legionella would decrease from two days, as is currently the case using organic production techniques, to just thirty minutes. In trials developed with the support of the UAB's Department of Genetics and Microbiology, the new sensors have enabled Salmonella to be identified i...

$5.1 billion would save 6 million children

...ith existing knowledge and treatments. In order to decrease child death rates, adequate funding must be availa... "The focus is on community-based resources, which decrease costs since building hospitals and other fixed resources isn't necessary. It is our hope that policy...

Climatologists discover deep-sea secret

...here has entered a cooling period, which creates a decrease in the amount of deep water transported to the Atl...eam. Nevertheless, the researchers have observed a decrease in the volume of freshwater sinking to the floor of the South Atlantic Ocean. According to Rainer Za...

Experiment station researchers to explore genome of disease-fighting fungus

...s to protect field crops from diseases. This would decrease the amount of pesticide and other chemicals applied throughout a growing season. "You also might be able to more effectively employ sustainable practices such as low till agriculture," said Wilkinson, who is researching the ecological aspects of the...

Structure-building cell signals also may influence learning and memory

...nd depending on other activity, ephrin appeared to decrease the number of glutamate receptors," said Yamaguchi. The regulation of glutamate receptors is crucial to maintaining memory and learning. The strength of a signal through a nerve cell synapse can be enhanced (by increasing the number of receptors) or ...

Mouse with designer liver has enhanced glucose tolerance, insulin response

...ned triglycerides in the liver with a commensurate decrease of circulating triglycerides in the bloodstream. Insulin response to glucose load was diminished in LGKO mice, thus glucose tolerance in the liver was significantly improved in the absence of Gab1 protein. The Feng team conducted biochemical analyse...

Currents could disrupt ocean food chain

...enario, global productivity of phytoplankton could decrease by as much as 20 percent and in some areas, such a...xide could increase water and air temperatures and decrease salinity in the North Atlantic at a rate significant enough to prevent the sinking and ultimate mixi...

Successful Test Of Single Molecule Switch Opens The Door To Biomolecular Electronics

...e, pushing it back into its insulating state. This decrease of current with increasing voltage is called “negative differential resistance?(NDR) and it allows a useful device to be made with just two electrodes, not the three originally used. “NDR is the basis for memories, switches and logic elements,?Linds...

Man-made wetland's effectiveness similar to natural marsh

...s and nitrate concentrations ?close to the kind of decrease we typically see in a natural wetland," said William Mitsch, a study co-author and director of the Olentangy River Wetland Research Park at Ohio State University. "The water was cleaner when it left the wetland than when it came in." The results app...

Could microbes solve Russia's chemical weapons conundrum?

...hen further MEA and EG were added, the overall PHT decrease was 83 percent. In the absence of a carbon source other than PHT, the PHT levels remained constant. When no bacteria were present, the PHT concentrations also remained constant. The authors conclude that the 1,4-perhydrothiazines undergo transforma...

Elephant seal pups suffer from ocean warming

...m 1975 to the late 1990s are correlated with a 28% decrease in the weight of elephant seal pups. Elephant seal... mothers' foraging time of about 36% (as well as a decrease in mass gained). After 1999, however, the declining trend abruptly stopped and the weaning weight of...

Road salt affects mitigation wetlands

...very winter." Silver's research does show a large decrease in non-biting midges in the designated runoff wetl...ct on other species is not yet known. There was no decrease in midges from the slightly salty wetland. In general, freshwater organisms are not very salt tolera...

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