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Tag: "rate" at biology news

Stress hormones may play new role in speeding up cancer growth

...s during periods of stress may increase the growth rate of a particularly nasty kind of cancer. The study showed that an increase in norepinephrine, a stress hormone, can stimulate tumor cells to produce two compounds. These compounds can break down of the tissue around the tumor cells and allow the cell...

New study: Preterm birth causes one-third of all infant deaths

... in the United States." The U.S. infant mortality rate has declined since 1995 except between 2001 and 2002, when the rate increased for the first time since 1958. In 2002, the National Center for Health Statistics listed ...

Proteins may predict lung transplant rejection

...ung transplant patients have the highest mortality rate of organ recipients, about 45% over five years, said lead investigator and pulmonologist Chris Wendt. Currently, there is no reliable way to predict which transplants will fail, and when signs of chronic rejection appear, it is usually too late to re...

Neuron cell stickiness may hold key to evolution of the human brain

...e last 100 million years. We measured the average rate of evolution in the human lineage in these sequences and then identified 992 elements with a significant excess of human-specific nucleotide substitutions relative to the baseline. This is about 79-percent more than we would expect to see by chan...

UCSF study will test new vaginal microbicide for herpes and HIV

...t researchers found that it actually increased the rate of HIV infection in women. So now we realize that we must approach new microbicides a little more carefully," Moscicki said. According to the U.S. Centers for Disease Control and Prevention, women account for more than one quarter of all new HIV/A...

Triple threat: World fin trade may harvest up to 73 million sharks per year

...s is the blue shark, and it appears that the catch rate is near the maximum sustainable level," says Clarke. "But such assessments were not available for other, less productive shark species. It is quite likely that sustainable catch levels have already been exceeded in some cases." The United Nations ...

New way of tracking muscle damage from radiation

... infusion of gadolinium, a contrast agent. "The rate at which the contrast agent flows in and out of a region, or whether it leaks out of the blood vessel, helps us understand whether the blood supply is in poor or good condition," Krasin said. "Changes in T2 measurements may indicate an increase in sw...

Antibiotic treats lymphoma of the eye

...fects. Patients treated with doxycycline had a 66% rate of disease-free survival. "Our prospective trial revealed that doxycycline is a fast, safe, and active treatment for OAL, both at initial diagnosis and at relapse," the authors write. In an accompanying editorial, Emanuel Zucca, M.D., and Frances...

Fight weeds with plant pathogens

...ol using imported pathogens has an overall success rate of 57 percent and has been just as successful as the use of imported insects, with no instances of unexpected or undesirable effects," says Raghavan Charudattan, University of Florida, Gainesville, FL. The bioherbicide approach utilizes native plan...

Increase in drug development for killer diseases is not enough

...ack of economic demand. Researchers argue that the rate of development of drugs (and of some vaccines and diagnostics) would increase if more incentives were created using patent rights and providing guarantees to purchase drugs for the poor as they are developed. The report (The New Landscape of Neglect...

Older fathers more likely to have autistic children

...ndred and eight individuals in the larger group (a rate of 6.5 per 10,000) and 110 in the group with both maternal and paternal ages (8.3 per 10,000) had a diagnosis of autism spectrum disorder, according to the information in the draft board registry. Among the paternal age groups of 15 to 29 years, 30 ...

'Protecting virus' offers instant flu protection and converts flu infections into their own vaccines

...ture but starts to reproduce ?and at a much faster rate than the new influenza virus. This fast reproduction rate ?spurred by the new flu infection ? means that the new invading influenza is effectively crowded out...

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

... although that number is currently changing at the rate of 10 to 20 per year. "It's a safe bet that a chi...account the number of dinosaurs already found, the rate of discovery and potential richness of the fossil locations that can be reasonably explored. They h...

Recycling technology

..."The amount LCD waste is increasing at an alarming rate and, with disposal in landfill or incineration no longer acceptable, new solutions were needed. We have developed a technology that offers a clean, efficient way to recover the mixture of liquid crystals from waste LCD devices. Once recovered, the ...

Intravenous gene therapy protects normal tissue of mice during whole-body radiation

...t 9.5 Gy, mice in the control group had a survival rate of 53 percent, while mice in the experimental group had a survival rate of 87 percent. Following irradiation to 9.75 Gy, only 12.5 percent of the mice in the control group ...

The power of one: A simpler, cheaper method for cell fusion

.... "In time, this could drastically increase the rate of cell fusion," he said. Lu has shown that his technology has a success rate comparable to current technology; about 30 percent to 40 percent of the cells are properly fused whe...

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

...this is a new finding." Although the pregnancy rate was much lower in heavy smokers, for those that did become pregnant the multiple pregnancy rate was much higher, with 60% of the heavy smokers expecting twins against 31% of the non-heavy smokers....

To slow AIDS in Russia, treat HIV-positive addicts, Stanford study says

...ing to the United Nations, Russia's HIV infection rate is among the fastest-growing in the world. By 2020, HIV could afflict 14.5 million Russians, according to a study from the Woodrow Wilson Center in Washington, D.C. Advances in antiretroviral therapies have the potential to stem the spread of th...

Controlling antibiotics and antibiotic resistance in hospitals

...o control antibiotic use and how this affected the rate of antibiotic resistance. "We saw in this study, as in other work we have done, that antibiotic resistance is increasing rapidly. This increase is seen in all types of hospitals across the country - large and small, teaching and non-teaching, VA a...

Ebola-outbreak kills 5000 gorillas

...nzees were also heavily affected, with a mortality rate of 77%. Lossi was just one in a series of large g...rely by reservoir spillover. The consistent spread rate of the Ebola infection wave also suggests that vaccination could be targeted just ahead of the advan...

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