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Tag: "rates" at biology news

Combined treatment extends life expectancy for lung cancer patients

... alone." With radiation alone, overall survival rates were as follows: one year ?57 percent two years ?36 percent three years ?21 percent With thermal ablation and radiation, they were significantly higher: one year ?87 percent two years ?70 percent three years ?57 percent Surgery is the...

Quitting smoking improves lung function considerably

... asthma are active smokers, with particularly high rates of acute asthmatics visiting hospital emergency rooms. The smokers with asthma recruited for this study were aged 18 to 60 and had lung function score results of less than 85 percent of their predicted level. They all had a cigarette history of ov...

Gene screen for breast cancer better than pathologist's 'eye'

... Hopkins researchers compared the cancer-detection rates of their QM-MSP test versus microscopic review by a pathologist on breast fluid samples. The fluid samples, taken from high-risk women or those diagnosed with breast cancer, were obtained through a process called ductal lavage, a saline wash via a c...

Invasive species alter habitat to their benefit

...levels of nitrogen in the soil and higher turnover rates of nitrogen, along with much lower light levels and lower soil temperatures," Farrer said. "So the litter was creating a pretty different environment." When she tallied other plants in the experimental plots, she found that both the diversity and ...

Tyrannosaur survivorship -- tough times for teens

...en in living large mammals. High newborn mortality rates due to predation alone subside once a threshold si... sarcophagus, say the research team. The mortality rates remained low until about the 13th year of life, at which point they reached total lengths of six met...

Coming soon: 3-D imaging that flies 'through' and 'around' cancer

...dical procedures, lead to better disease detection rates of colon cancer, provide surgical guidance and det...a patient. Cancer cells metabolize sugar at higher rates than normal cells, and the radiopharmaceutical is drawn in higher concentrations to cancerous areas....

Dominant meerkats render rivals infertile

...lapse in fertility. This tactic reduces conception rates and increases abortion rates among the evicted subordinates, who are only allowed to return to the group after the dominant femal...

Large dinosaurs were extremely hot in their day, UF study finds

...ationships among body size, temperature and growth rates with newly available fossil data on the growth rates of eight dinosaur species. Using a mathematical formula, they produced the first prediction of dinos...

UCLA study of community health project shows how group dynamics affect fitness, eating habits

...s within the African-American community, where CVD rates are 20 percent higher for black men and 40 percent... in the 12-week group. Attendance and retention rates between baseline and post-intervention assessment were quite low for the 12-week curriculum (30 perc...

Researcher studies, treats military with 'silent disease'

... virus, which affects the U.S. military at similar rates as the civilian population, causes tiny scars to f...ne, random drug screening is also believed to keep rates lower than the civilian population. One offshoot of Sjogren's research has been discovering how mil...

New research finds surveys of larval-stage organisms effective for measuring marine biodiversity

...s in the world. Often areas with particularly high rates of biodiversity are targeted for conservation, so the new method could help by highlighting potential regions for protection. Barber also believes this new information will move scientists one step closer to the goal of documenting the entire world...

Recent, rapid climate change is driving evolution of animal species

... is emerging. Questions remain about the relative rates of environmental and evolutionary change. However, it is clear that unless the long-term magnitude of rapid climate change is widely acknowledged and effective steps are taken to mitigate its effects, natural communities that we are familiar with wi...

The higher the hierarchy, the greater the aggression

...e rank mattered in a cooperative society, then the rates of aggression would be highest toward the front of...ominants to establish their status. "We found that rates of both aggressive 'displays' (aimed at individuals of lower rank) and aggressive 'tests' (aimed at ...

Report warns about carbon dioxide threats to marine life

...ot yet fully predict how much marine calcification rates will change in the future, the report warns that the more critical question is: "What does this mean in terms of organism fitness and the future of marine ecosystems?" ...

New method confirms importance of fungi in Arctic nitrogen cycle

... plant sugars derived from photosynthesis, but the rates of transfer have never been quantified in the field. John and Erik Hobbie's study, published in the April 2006 issue of the journal Ecology, quantifies the role of mycorrhizal fungi in nitrogen cycling for the first time through measurements of the n...

Evolutionary forces explain why women live longer than men

...ommon chimps, the greatest difference in mortality rates for males and females occurs at about 13 years of ...-set men apart from most women. "Because mortality rates in general are going down, behavioral causes of death are ever more prevalent," Kruger said. Looki...

A new view on Lyme disease: Rodents hold the key to annual risk

...s in part on understanding what controls infection rates among the agents of transmission. In a new study published in the open access journal PLoS Biology, Richard Ostfeld, Felicia Keesing, and colleagues examined the ecological determinants of Lyme disease over a 13-year period in southeastern New York, ...

'Molecular assassin' targets disease gene

... would be a significant development given the high rates of skin cancer and because the main treatment currently is surgical excision, which can cause scarring," said Professor Khachigian. "Conventional anti-inflammatory drugs are associated with a whole host of side-effects. Our therapeutic may potentia...

US infant mortality rate fails to improve

...or Health Statistics (NCHS). The infant mortality rates showed no significant improvement in 2003 after in... the U.S. in 2003. Multiple births had mortality rates more than five times that of singleton babies, according to the NCHS report. Babies born to Black mo...

Study defines effective microbicide design for HIV/AIDS prevention

...eral African countries, for example, HIV infection rates among young women between the ages of 15 and 24 are more than three times higher than among their male counterparts. Women are about twice as likely as men to contract HIV during vaginal intercourse, according to the federal Centers for Disease Con...

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