were 2 5

Tag: "were" at biology news

Endosome-mediated signaling in plants

...uthor of the paper, Dr. Niko Geldner. Endosomes were once thought to function solely in the inactivation of receptors and the down-regulation of cell signaling. Work in animal cells over the past several years has shown that receptor endocytosis can actually facilitate signaling through the cell, by br...

Fat fish put obesity on the hook

...off or diminishing the fat-storing mechanisms that were once crucial to the survival of our species. The zebrafish has become a model animal for the study of many diseases because it has a backbone and because its genetics have been well described. This is one more example of how basic experimental biolog...

Reconstructing the biology of extinct species: A new approach

...ng the radius of curvature. Most of the specimens were scanned at the Center for Quantitative Imaging at Penn State on the OMNI-X high-resolution x-ray CT scanner, which can resolve features approximately 1/100 the size of those detected by medical CT scanners. In addition, experienced field workers use...

How 'memory' T cells curb the spread of viruses throughout the body

... of the same disease. This is why before vaccines were developed, childhood diseases such as measles and mumps occurred only once in a lifetime. The immunity occurs when the immune system produces cells called lymphocytes that specifically attack and eliminate the virus at the time of infection. After t...

Restricting hospital-based services during SARS outbreak had modest impact

...the non-urgent use of hospital-based services that were imposed when a provincial health emergency was declared during the 2003 SARS (Severe Acute Respiratory Syndrome) outbreak in Toronto, Ontario, resulted in only modest reductions in overall admissions. In this study, Dr. Michael J. Schull and colleagu...

Children of smokers have more than 5 times higher levels of a nicotine toxin

... Sleeping with parents and lower temperature rooms were also associated with increased amounts of cotinine...parent that smoked and the parents of the other 33 were non-smokers. The authors say: ‘Smoking babies tend to come from poorer homes, which may have sma...

Prey not hard-wired to fear predators

...ies. By contrast , where wolves and grizzly bears were lost, migratory birds including warblers and hummingbirds were less abundant because moose over-browsed vegetation used by these migrants. “It is not just changes ...

The mouflons of the Kerguelen archipelago

... the founders,” said Denis Réale with a smile. “We were even able to obtain genetic material from the population of origin from the Vincennes Zoo. “We took the DNA from these samples, and looked at specific genetic sites,“ explained Renaud Kaeuffer. “We expected that the genetic diversity of this populati...

Researchers develop buckyballs to fight allergy

..., researchers modified the buckyballs so that they were compatible with water. The new study findings were published online in the June 19 issue of the Journal of Immunology and will appear in the July 1 pri...

Gene therapy study shows safety and statistically significant improvement in Parkinson's disease

...erve as a study control. The reported improvements were observed primarily on the treated side of the body...aluations and the PET scans. Neurologix scientists were also co-investigators in the study. “This ground-breaking study represents not only an encouragin...

Scientists close in on missing carbon sink

...s had generally indicated that tropical ecosystems were a net source of 1.8 billion tons of carbon, largel...forests, presumably because trees and other plants were absorbing high amounts. Conversely, scientists had assumed a large amount of carbon was coming ou...

Ice Age extinction claimed highly carnivorous Alaskan wolves

...lived in Alaska, north of the ice sheets. Wolves were generally thought to have survived the end-Pleisto... of American wolves because North America and Asia were connected during that time period. That they were completely unrelated to anything living was quite ...

Antarctic icebergs -- Hotspots of ocean life

... southeast of Cape Horn. The icebergs in the study were up to a dozen miles long and more than 120 feet high, with one extending nearly 1,000 feet into the depths. Despite the risks of getting close to these mountains of ice – which can shed huge pieces or overturn without warning – the scientists beg...

Modified mushrooms may yield human drugs

...trates that if a second gene, insulin for example, were to be patched in the plasmid, that gene would be expressed as well. "There is a high probability that if the mushroom cell has the hygromycin resistance gene, it will also have the partner gene," Dr. Romaine added. The degree of gene expressio...

Definitive evidence found of a swimming dinosaur

...st compelling evidence to-date that some dinosaurs were swimmers. The 15-meter-long trackway, located in L...umenting the behavior. Several earlier discoveries were later found to have been produced on dry ground or categorized as ghost traces, possible undertracks...

Adult stem cells from human cord umbilical cord blood successfully engineered to make insulin

...t stem cells in the laboratory to ensure that they were predisposed to divide. Then they used a previously...x signals produced by the embryonic mouse pancreas were used to direct adult stem cells to begin developing, or "differentiating," into islet-like cells. ...

Experimental gene therapy 'abolishes' arthritis pain and lessens joint damage

... pain in the study model. In addition, researchers were surprised to find that the therapy also brought ab...sity of Rochester School of Medicine and Dentistry were co-authors J. Edward Puzas, Ph.D., Donald & Mary Clark Professor of Orthopaedics, M. Kerry O'Ban...

'Smart' mice teach scientists about learning process, brain disorders

...to have made them smarter." The engineered mice were more adept at learning to navigate a water maze an...e water maze being rearranged, the engineered mice were much faster to realize that things were different and work out the new route. Dr. Bibb cautioned...

Skimmed milk -- Straight from the cow

...milk the cows actually produce. The rogue cows were discovered when biotech company ViaLactia screened the range of milk compositions across the entire herd of 4m New Zealand cattle. New Zealand dairy firm Fonterra has already made milk products from Marge’s milk and they maintain the positive taste....

'Virtual autopsy' helps identify drowning as cause of death

...drowning victims and a control group of 12 men who were victims of sudden death from coronary artery disease. Following MDCT, routine autopsies were performed. MDCT images were evaluated for the presence of fluid and sediment in the paranasal sin...

1 2 3 4 5 6 7 8 9 10