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Tag: "yet" at biology news

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

...d. The researchers theorized that a very simple yet efficient way of doing this kind of learning would be for the brain to first learn how objects vary in shape, and then, in a second stage, to learn which shapes go with which labels, allowing the brain to sort an object into different labeled "bins" ...

Scientists discover new life forms in the Arctic Ocean

...ly distributed throughout northern seas. They have yet to be brought into culture, but can be seen using advanced microscopy techniques. "It's a very exciting discovery," comments Dr. Lovejoy. "The ocean covers 70% of planet earth and we are only now coming to appreciate its rich and complex biodivers...

Bioluminescence at the service of a novel cerebral imaging technique

...) based on long-term recordings. Such maps do not yet exist for any animal species, including man. A funding application has been made to the ANR in order to build up functional maps of the Drosophila brain. These maps are a prerequisite to producing a mass of data on the global activity of the e...

What recognizes what in plant disease resistance?

...ants have an immune system that resists infection, yet 10% of the world's agricultural production is lost annually to diseases caused by bacteria, fungi, and viruses. Understanding how disease resistance works may help combat this scourge. In a new study published online this week in the open-access jo...

Large size crucial for Amazon forest reserves

...covered that the size of Amazon forest reserves is yet more important than previously thought. Their findings, to be published this week (January 12th) in the journal Science, underscore the importance of protecting the Amazon in large stretches of primary forest. The article summarizes bird survey res...

Exploring the molecular origin of blood clot flexibility

... to stem the flow of blood when tissue is damaged, yet be flexible enough so that it does not block blood flow and cause heart attacks and strokes. In previous research, senior author John W. Weisel, PhD, Professor of Cell and Developmental Biology, measured the elastic properties of individual fibers ...

Prenatal cocaine's lasting cellular effects

... function normally. Though this effect has not yet been assessed in cocaine-exposed children, the fin...esistant ADHD. "Neither we nor anyone else has yet identified whether this mechanism occurs in the human population," Stanwood said, "so that is a crit...

FSU researchers determine a critical factor in workings of proteins

...ure paper as "the most comprehensive investigation yet conducted of protein-protein association rate. It provides convincing evidence that the remarkable simplification of the calculation of association rates between proteins, proposed by Zhou and coworkers, really works."...

Cancer tip -- Nanoparticles can damage DNA, increase cancer risk

...l enough to penetrate cell membranes and defenses, yet they are large enough to cause trouble by interfer...more toxic than others, there’s not enough data as yet to determine the most dangerous types. "A lot is unknown about nanoparticle function, but clear...

Natural gut hormone offers hope for new obesity drug

...ng tumours have elevated levels of the hormone and yet appear to show no adverse side-effects. "These people may have had high levels of PP for ten or fifteen years without showing side effects," he explains. "In that sense, they have provided us with a natural experiment that suggests that excess leve...

Global 'sunscreen' has likely thinned, report NASA scientists

...n, more cloud formation and more rainfall ?has not yet been observed. "Less sunlight reaching the surface counteracts the effect of warmer air temperatures, so evaporation does not change very much," said Gavin Schmidt of GISS, a co-author of the paper. "Increased aerosols probably slowed the expected ch...

Chemical switch triggers critical cell activities

...left hand. That leaves the right hand free to grab yet another NEDD8. By continually passing the NEDD8 proteins from the right hand to the left hand and on to E2, E1 keeps a relay of these batons flowing. In turn, that keeps the specific biochemical cascade triggered by NEDD8 in action. But in order f...

Study uncovers a lethal secret of 1918 influenza virus

...ich has claimed nearly 150 human lives but has not yet shown a capacity to spread easily among people. "What we see with the 1918 virus in infected monkeys is also what we see with H5N1 viruses," Kawaoka says, suggesting that the ability to modulate immune response may be a shared feature of the most ...

No sex for 40 million years? No problem

...40 million years without sexually reproducing, and yet this new study has shown that they have evolved in...One lives around its legs, the other on its chest, yet they have diverged in body size and jaw shape to occupy these distinct ecological niches. Our result...

Gene study shows three distinct groups of chimpanzees

...tives, closer to humans than they are to gorillas, yet we know so little about them, and even less about gorillas and orangutans." The chimpanzee genome differs from the bonobo genome by about 0.3 percent, which is one-fourth the distance between humans and chimps. Yet chimps and bonobos have radica...

Termites get the vibe on what tastes good

..., although the exact mechanism for this ability is yet to be explored. "Scientists have known for some time that termites are receptive to vibrations," Mr Inta says. "But these results demonstrate that termites' methods of food assessment are much more sophisticated that previously thought. "When of...

New sensor detects gaseous chemical weapon surrogates in 45 seconds

...l detection technique that can be miniaturized and yet is still practical to operate in field environment...ther technology needed for QPAS are so simple, and yet robust, that further development is a low-risk investment, and we're eager to take it to the next le...

Active ingredient in common Chinese herb shown to reduce hypertension

...hinone IIA or danshen work in hypertension are not yet fully understood, these results contribute to the effort to bring complementary and alternative medicine and allopathic care closer together in the treatment of hypertensive patients. ...

Largest genomic search finds genes that may contribute to autism

...the largest set of autism-related genetic material yet examined. The researchers found neurexin 1, part of a family of genes that plays a role with the neurotransmitter glutamate, and a still-to-be-pinpointed gene on chromosome 11 to be likely susceptibility genes for autism. "Neurexin 1 is a highly l...

Antibody signal may redirect inflammation to fuel cancer

...cer cell development." The researchers have not yet identified what specific signal or signals are involved, but preliminary evidence indicates that antibodies may signal specific receptors on leukocytes to enhance the cancer-promoting pathway. Part of the receptor for the antibody known as immunoglob...

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