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Tag: "never" at biology news

Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census

...eave behind fossils that could be found. "I would never suggest that this prediction, however statistically sound, is the final word on dinosaur diversity," Dodson said. "My intention is to fuel the discussion using the facts at hand, and this is the best estimate we can make with the data available." ...

HIV-1 kills immune cells in the gut that may never bounce back

...ow that the immune cells in other body tissues may never rebound, suggesting the need for additional ways to monitor immune system health, and the need for hypervigilance as HIV-positive patients live into their forties, fifties, sixties and beyond. The findings are reported in today's issue of PLoS Medici...

Heavy smoking cuts women's chance of pregnancy -- even with donated oocytes

..., its possible effect on uterine receptiveness has never been evaluated until now," he said. "Our study is just the first step on this path, and certainly not the last, but it means that we should now be telling patients, if they are heavy smokers, that even if fertilisation takes place they have less ...

Fantastic Voyage: A new nanoscale view of the biological world

...research. "This method allows us to see what has never been seen before, and to measure what has never before been measured," Lechene says. "Imagine looking into a building, slice by slice. You can see n...

Proteins necessary for brain development found to be critical for long-term memory

... the shock treatment was also blocked. "We would never have expected that the secretion of these growth factors in response to serotonin would be critical for long-term memory formation in this system," Carew said. "But it is apparent that without them, this process cannot happen." According to Carew, ...

Fast-freeze snapshot yields new picture of nerve-muscle junction

...eurotransmitter localize in places scientists have never before seen. "It tells us that specific proteins are required to transition vesicles in close apposition to pre-synaptic membranes," said Richmond. "That prediction had been made, but hasn't before been demonstrated." Richmond said the conventional...

Genetic surprise confirms neglected 70-year-old evolutionary hypothesis

...tion has jumped clear off the chromosome. "It had never occurred to us that the gene might have moved right off chromosome #4 in simulans," says Masly. As the simulans' genome was newly sequenced, Masly called a colleague, geneticist Corbin D. Jones, a co-author of the paper and Rochester graduate, who w...

What does the public really know about HPV?

...eard about a vaccine for HPV, 80 percent indicated never having talked to a health care provider about the virus. How the vaccine was presented greatly affected women's intentions to vaccinate. When women read that the vaccine protects only against cervical cancer, 63 percent indicated they were ...

Stroke symptoms common among general population

...lder than 85 years show evidence of stroke despite never having been diagnosed with the condition. Because awareness of stroke symptoms is low, it is possible that these individuals had symptoms but did not recognize them or that the symptoms did not reach the threshold necessary for a stroke diagnosis. ...

Mayo researchers discover HIV dependence on a human protein

... with multiple daily antiviral medicines, they are never cured. Stopping the medicines even briefly lets HIV repopulate the body with many millions of copies, like a computer virus spreading around the world from a single infected computer. ...

New sunscreen ingredient to heal sunburn and help prevent skin cancer

... in the shade between 11am and 3pm Make sure you never burn Aim to cover up with a t-shirt, hat and sunglasses Remember to take extra care with children Then use factor 15+ sunscreen "UVB sunlight is associated with the hottest part of the day, between 10am and 3pm, when the sunlight is brightest,"...

First Biodiversity Census of coral reef ecosystems in the NW Hawaiian Islands

...ledge of what lives in the NWHI chain. There will never be any way to measure impact on the environment without first knowing what is there" said Dr. Joel Martin, Chief of the Division of Invertebrate Studies and Curator of Crustacea, Natural History Museum of Los Angeles County. Coral reefs are high...

Study highlights new and cheaper way to treat heroin addiction

...custody or prison. Its effectiveness has, however, never been tested before. Dr Roy Robertson, a Reader at the University of Edinburgh, who is the study’s main author, said: "Heroin addiction is a chronic condition requiring long-term medication. Just as with other chronic conditions, such as diabetes o...

Proteins may behave differently in natural environments

... balloon," he said. "This sort of expansion has never been observed before," he said. In terms of native GroEL, the finding may indicate the need to look at the chaperone itself more closely. "The expansion was directly related to the function of the assembly. From a more global perspective, thi...

Pattern of human Ebola outbreaks linked to wildlife and climate

...aled that some of the antibody-positive people had never visited a region where known Ebola outbreaks occurred in humans. Therefore people have been exposed to the Ebola virus where it has not been recognized. Based on their findings, the researchers were able to identify relationships among previously...

Electric jolt triggers release of biomolecules, nanoparticles

...ld be removed from a surface in this way, but it's never been considered useful. They've been more interested in preventing this from happening." Yet Searson and Johns Hopkins biomedical engineering graduate students Prashant Mali and Nirveek Bhattacharjee concluded that this controlled release of molecu...

Successful lung cancer surgery not enough to break nicotine dependence in many smokers

...r mark waited longer to attempt to smoke again, or never began again. In fact, more than one in four patients who smoked after surgery were nonsmokers at the 12-month follow-up, he said. "Perhaps for these patients, lung cancer surgery was a wake-up call to quit, but many others need intervention to help ...

Researchers make nanosheets that mimic protein formation

...n a surface or at an interface between two fluids, never while suspended in a single fluid. The work started in Kotov's lab three years ago, when he and his team observed the sheets in experiments. Though they created them, they weren't sure how. "We were aware of certain proteins in living organisms...

Biologists probe the machinery of cellular protein factories

...l of the ribosome. The new picture shows details never seen before and suggests how certain parts of the ribosome move during protein synthesis. A paper describing the new findings will be published in the September 22 issue of the journal Cell and is currently available online. "We can now explain a ...

Older men treated for early prostate cancer live longer than those who are not

...rized in the study, because observational data can never completely adjust for potential selection bias and confounding, our results must be validated by rigorous randomized controlled trials of elderly men with localized prostate cancer before the findings can be used to influence treatment decisions." ...

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