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Tag: "never" at biology news

Indicators for risk of heart disease are higher in passive smokers

... III, 1988?4), which included 7,599 adults who had never smoked. Sixty-eight percent of the participants were women, with participants' median age being 38. Eighteen percent of participants had no detectable levels of cotinine; the rest were classified as having either low or high cotinine. Eighteen pe...

Tumor-suppressor gene is critical for placenta development

...s important in miscarriages. "Miscarriages have never been linked to a gene defect, but understanding the genetic basis of miscarriage would be a hugely important," Leone says. "It would be the first link between a gene mutation, placental function and development." ...

Infection detectives use disease 'fingerprints' to track common infections in children

... it’s in, so if someone engineers a virus that has never been seen, we will have hints that it’s close to something that is known," he said. Further studies may eventually help doctors track the progression of disease and help assess risks of complications, Dr. Ramilo said. ...

Darwin's famous finches and Venter's marine microbes

...spanned a huge range and included several that had never been described before. "Prokaryotic protein-like kinases were considered to be some sort of niche players, but actually they are more prevalent and widespread than histidine kinases," explains Manning. Bacteria were thought to rely mostly on hist...

Using brain scans, researchers find evidence for a two-stage model of human perceptual learning

...hem," said Riesenhuber. "It's like if a person had never seen faces before, they would all look similar at first." In the first experiment, the participants looked at series of cars presented at different parts of the screen and performed simple position judgments on the images, while their brain activi...

Bioluminescence at the service of a novel cerebral imaging technique

...deeply embedded in the centre of the brain and has never been studied physiologically because it was always inaccessible to standard, fluorescent-type markers. Such recordings of the ellipsoid body have thus demonstrated the considerable sensitivity of this novel approach, while validating access to all s...

World's largest flower evolved from family of much tinier blooms

...most significant among living organisms, and could never have been deduced by conventional methods." Found growing on the jungle floor in parts of southeastern Asia, rafflesia is unusual in more than just its flower's size. A parasite, it derives its nutrients from a plant in the grapevine family and lac...

New study may show how to forestall a fatal, virus-caused immune-system meltdown

...n into a shock-like state from which he or she may never recover. Now, researchers at the University of Texas Medical Branch at Galveston (UTMB) believe they’ve found a way to spot the biochemical profile of an inappropriate immune response to viral infection ?an important step toward developing new the...

Bats prey on nocturnally migrating songbirds

... Finally, owls, as typical night-active predators, never forage in the open space: moving prey is detected from substrates through passive-listening of rustling noises. The unique ecological niche of the giant noctule may in turn explain some of its peculiar natural history traits. First, the species ...

New species declared: Clouded leopard on Borneo and Sumatra

... double dorsal stripe. “Who said a leopard can never change its spots? For over a hundred years we have been looking at this animal and never realized it was unique,?said Adam Tomasek, head of WWF’s Borneo and Sumatra program. “The fact that ...

Lost dogs found more often than lost cats, study suggests

... but nearly half of the cats reported missing were never found." More than one out of three owners (35 percent) found their lost dogs at a shelter. Just 7 percent of cat owners who recovered their pet found it at a shelter. "Cat owners tend to wait longer to call and visit a shelter," said Lord, adding...

Researchers find hepatitis A and hepatitis C attack same protein to block immune defenses

... different protein, known as 3ABC. "Hepatitis A never manages to establish a long-term infection like hepatitis C even though it also destroys MAVS," Lemon said. "This suggests that the degradation of this cell protein is not the main reason that hepatitis C becomes persistent. These results thus provid...

New research shows that flu is a trigger of heart attacks

... different stages of atherosclerosis and many will never show any clinical manifestations of the atherosclerosis. However, in some patients the quiescent, stable atherosclerotic plaques undergo sudden changes, mainly due to exaggerated inflammation, leading to rupture of these vulnerable plaques and subseq...

Old dinosaur research leads to new honor

...arch opportunity through NSERC to pursue this, and never expected it would be that successful. In fact, there will soon be an interpretive centre at the site where we found the embryos ?the Golden Gate Highlands National Park in South Africa. It certainly is an honour to be recognized for my work." ...

Surgeons with video game skill appear to perform better in simulated surgery skills course

...urgeons who participated in the study, 15 reported never playing video games, nine reported playing zero to...scored 42 percent better overall than surgeons who never played video games. Current video game players made 32 percent fewer errors, were 24 percent faster...

No sex for 40 million years? No problem

A group of organisms that has never had sex in over 40 million years of existence has nevertheless managed to evolve into distinct species, says new research published today. The study challenges the assumption that sex is necessary for organisms to diversify and provides scientists wi...

Scientists unlock mystery of embryonic stem cell signaling pathway

...nic stem cells on a layer of mouse fibroblasts has never made much sense to the scientists forced to do just that. “Stem cells that grow on feeders are contaminated with mouse glycoproteins markers,?Kahn says. “If you use them into humans, you’d potentially have a horrible immune response.? And so, in or...

Uganda's mountain gorillas increase in number

...ed and distinguished, even among groups which have never been seen by people. Fecal specimens were analyzed at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany. Researchers were encouraged by the overall growth of the population, showing an annual increase of one percent over ...

Tiny clue reveals new path toward heart disease

... called kalirin, implicates a biological mechanism never before linked to cardiovascular disease, according to the Duke researchers who led the study. Further study of this new clue could lead to novel ways to treat or even prevent the disease, the researchers said. "The ultimate goal is to determine w...

Speeding 'fingertip' discovery -- 20 years of protein info in 1 place

...iscovered that about 80 percent of what they found never had been reported. The team then constructed an online search tool, PhosphoMotif Finder, which was incorporated into their previously established Human Protein Reference Database. Human Protein Reference Database now contains about 16,000 phosphor...

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