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Tag: "rate" at biology news

Recurrence of a flu pandemic similar to infamous 1918 flu could kill 62 million

...from 24 states). In the Philippines, the mortality rate was 2.8 percent, in the Bombay region of India, 6.... central India, 7.8 percent, which was the highest rate of the countries and regions analyzed. According to this data then, from Denmark to central India, d...

Five new technologies that promise to transform medicine

...t in some aspects of contemporary medicine and the rate of their impact is increasing, he concludes....

A simple feedback resistor switch keeps latent HIV from awakening

...onversion of the two forms, coupled with the known rate of breakdown of Tat, was sufficient to encode a re...he cell, Tat deacetylation occurs at a much faster rate than acetylation. Deacetylated (inactive) Tat can take one of two paths--reconversion in to acetylat...

How does a zebrafish grow a new tail?

... regenerating fin. "We can actually increase the rate of regeneration by turning on these genes," Moon said. The researchers also noted, "We show that Wnt/Beta-catenin signaling is activated in the regenerating zebrafish tail and is required for the formation and subsequent proliferation of the progen...

Resistant bacteria increasing source of muscle infection

...n extremity." Houston, in particular, has a high rate of MRSA infections. More than 75 percent of commun...reat these infections in the past), she said. The rate of such infections is increasing nationwide. In surveying patient records, Pannaraj and her collea...

Viral marker of human migration suspect

...group suggest that DNA viruses may not have a slow rate of evolution as previously thought, and that the viruses like JCV might in fact be evolving twice as fast. ...

Increase in carbon dioxide emissions accelerating

New research shows the rate of increase in carbon dioxide emissions more than ...o the atmosphere as carbon dioxide in 2005 and the rate of increase is accelerating. "From 2000 to 2005, the growth rate of carbon dioxide emissions was...

Three-in-one virus killer prevents common, often fatal infections

...bination therapy drastically reduces the infection rate of three viruses ?and risk of death ?in transplant patients with compromised immune systems. The findings, to be reported in the Nov. 1 print edition of Nature Medicine, originate from a study conducted at Baylor College of Medicine, The Methodist Ho...

AIDS study challenges conventional treatment guidelines for HIV patients

...s much less reliable as a tool for determining the rate at which he or she will lose infection-fighting CD...t 5% of the variation from person to person in the rate of CD4 cell loss. Thus, CD4 depletion cannot be viewed as a simple consequence of the amount of viru...

Beauty and the brain

...grees of variations around that same prototype and rate their appeal. "As predicted," the researchers write, "participants categorized patterns more quickly and judged them as more attractive when the patterns were closer to their respective prototypes." And: "Critically, the less time it took parti...

Solved: The mystery of flesh-eating bacteria's relentless attack

...e receiving this peptide survived at a much higher rate than mice that did not receive it. The team also o... the mutant strain succumbed to infection, a death rate much lower than that of mice who received the original strain. Mice receiving the original bacteria ...

Rhesus monkeys in Nepal may provide new alternative for HIV/AIDS research

...leles that are known to influence immunity and the rate of disease progression in the animals, including one that is present in Indian rhesus macaques but not in the Chinese ones. Kyes, who also is a UW research associate professor of psychology, said the genetic analyses indicate the Nepali rhesus maca...

New mechanism explains glucose effect on wakefulness

.... "These results provide evidence that the firing rate of orexin cells is sensitive to changes in glucose that correspond to fluctuations occurring normally during the day and also show that the same electrical mechanism is involved in sensing both subtle and extreme changes in glucose," they wrote. Wha...

Scientist works to improve treatment for brain tumors

...l time of 12 to 14 months and a five-year survival rate of 1 percent to 5 percent. The drug's development was based on Debinski's finding that glioblastoma cells over-express large amounts of a receptor for interleukin 13 (IL13), a protein that regulates the immune system. Debinski combined IL13 with a ...

Air travel and pandemic flu

...other and how travel restrictions might reduce the rate of spread. Their calculations allowed for such factors as the time of the year, the number of air passengers who might travel between the cities, and the fact that some people are more resistant to infection than others. From the use of their math...

MIT engineers probe spiders' polymer art

...r viscosity, or consistency, changes with both the rate and the total amount of strain applied to them. Spider silk is a protein solution that undergoes pronounced changes as part of the spinning process. Egg whites, another non-Newtonian fluid, change from a watery gel to a rubbery solid when heated. ...

Why we could all do with a siesta

...ousal, food seeking, hormone release and metabolic rate to ensure that the brain always has adequate glucose." Malfunction of orexin neurons can lead to narcolepsy, where sufferers cannot stay awake, and obesity; there is also evidence that orexin neurons play a role in learning, reward-seeking and addic...

Study defines effective microbicide design for HIV/AIDS prevention

...ther improve such microbicides' ability to cut the rate of HIV spread, the researchers said. The researchers now are conducting studies to experimentally measure the diffusion of viral particles through various delivery vehicles. They also are collaborating with other researchers on developing high-perf...

Clot-busting drug helps revive cardiac arrest patients

...se there is only a 5 percent to 7 percent survival rate using interventions we now have," said Bozeman, associate professor of emergency medicine. "We hope this small study will lead the way for additional research on this promising new approach." Fifty patients who did not respond to treatment with AC...

Newborn screening can cause unnecessary parental stress

...Difficult Child scale. (The first asks parents to rate their agreement with statements like "I expected to have closer and warmer feelings for my child, and this bothers me"; the second has statements such as "My child makes more demands on me than most children.") Waisbren believes a positive test resu...

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