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Tag: "again" at biology news

Math that powers spam filters used to understand how brain learns to move our muscles

...s were turned off. The spot of light was turned on again and the computer learner was again asked to look at that same spot. The learner’s speed and pattern in adapting its movements matched t...

The insect vector always bites twice

...ransmitted to the human host when the insect bites again to take another blood meal. Morbidity among infected people is therefore associated with the degree of exposure of the subject to insect vector bites. The vector saliva, which is adapted for blood feeds, plays a prime role in the transmission of ...

New bacterium discovered -- related to cause of trench fever

...atches its owner or an unlucky visitor. They were again surprised to find that this microbe is the second Bartonella species to cause infection in AIDS patients. Like trench fever, cat scratch disease had been described in the early 1900s, but no one knew what bacterium caused cat scratch disease unti...

Columbine flowers develop long nectar spurs in response to pollinators

...llinators. Then the process stops, and only starts again when there is a change in pollinators. Whittall and Hodges proved this idea by testing the columbine genus Aquilegia, which is pollinated by bumblebees, hummingbirds and hawkmoths. They found that most of the columbines' nectar spur length evol...

Undergraduate research shows leaderless honeybee organizing

... the swarm, as the bees need to make the queen fly again once a new nest site has been selected. “Drew Pierce did this project last summer,” Schneider explained. “We constructed a special observation stand where we could actually see how workers were interacting with queens inside a swarm cluster, w...

Herpes virus hijacks DNA repair process

... murine herpes virus, its ability to reproduce was again curtailed. How DNA damage response benefits viral replication is still a mystery and a topic of continuing investigation in the Virgin lab. "The discovery that induction of the cells' DNA damage response is an intentional viral strategy, rather t...

AAAS decries latest stem cell veto

The President has again vetoed the Stem Cell Research Enhancement Act, whi... text of the AAAS statement: "The President has again vetoed the Stem Cell Research Enhancement Act, which would expand federal support for embryonic stem...

HIV and malaria combine to adversely affect pregnant women and their infants

... that HIV-infected women lose these antibodies and again become susceptible to the ravages of PAM. The findings, according to Kain, may help in the development of PAM vaccines. "This is only the first step in creating therapeutics to treat this devastating disease," he stresses. "We hope to help transla...

Does amateur boxing cause brain damage?

...boxers. Boxers were tested after a fight and then again three months after rest from boxing. The study also included 10 healthy men who were not athletes. The study found high CSF levels of neuronal and glial markers suggestive of brain damage after a fight. A particular marker for neuronal damage, ...

Genetic roots of bipolar disorder revealed by first genome-wide study of illness

...e healthy group was pooled and scanned separately, again at a fraction of the cost of individual scans. The researchers then zeroed in on the gene variations that occurred more often in the people with bipolar disorder and examined them individually. An important issue in genetics research is that find...

Switching genes to overdrive improves muscular dystrophy symptoms in mice

...rodents were run on a treadmill for one hour, then again 24 hours later. Normal mice completed the runs easily on both days, while untreated MDX rodents were exhausted halfway through each run. The MDX mice with increased PGC-1alpha activity performed almost as well as normal mice on the first day; their p...

Gut research yields new anti-cancer approach

... as single agents). Tumors generally begin growing again with a year. Moving forward, the research team will seek to determine exactly which proteins are involved in the anti-cancer effect of PPARgamma inhibitors. Combination therapy is the current leading strategy in treating cancer, and finding th...

Selectivity is ultimate aphrodisiac

...rested in meeting each person they had speed-dated again in the future. Mutual "yeses" were given the ability to contact one another. "People who like everyone, unlike in a friendship context where they generally are liked in return, may exude desperation in a romantic context," Finkel said. "It s...

NT researchers discover breakthrough in malaria treatment

...n at risk of further infections, from getting sick again within 6 weeks. This "post treatment prophylaxis" is similar to the approach of giving travelers regular medication to protect them from infection, but can be applied opportunistically to people at high risk of infection in poor tropical communities...

When your brain talks, your muscles don't always listen

...n the upturn toward one peak and then it eases off again in the downturn toward a valley," Knight noted. Once recordings were completed at one site in the muscle, the electrode was repositioned to sample from other motor units within the muscle. Knight and graduate student Dhiraj Poojari and undergra...

Synthetic peptide targets latent papilloma virus infections

...te chromosomes into the daughter cells, where they again take up residence in the nucleus as latent viral DNA. The viral plasmids turn into infectious viruses only in the top, differentiated layers of tissue. Previous work showed that the bovine papilloma virus hitchhikes by throwing out a thumb - in act...

University of Alberta researchers unravel intricate animal patterns

...school contracts in a tight aggregation, to expand again when the predator is gone. And we can try to compare this behaviour with the breather pattern described in our paper." The results of the model suggest that if we want to better understand the aggregations we see in nature, says Eftimie, we should...

Smoking ban dramatically reduces air pollution in Irish pubs

...or to the March 29, 2004 national smoking ban, and again one-year later. Among the barworkers, the self-reported workplace exposure to environmental tobacco smoke was over 40 hours per week pre-ban, but dropped to about 25 minutes post-ban, showing a 99 percent decrease in exposure. Post-ban tests al...

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

...ere shown the cars from the first experiment while again being scanned, allowing the researchers to compare... brain's ability to process car shapes. They found again that cars selectively activated an area in lateral occipital cortex, but that now neurons in that ar...

Out of Africa -- Bacteria, as well

...rsity linger, even when the population starts once again to increase in number. Since the Homo sapiens populations usually had to pass through several genetic bottlenecks on their way across the globe, their genetic diversity declined the further they journeyed from their origin in East Africa. Scientis...

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