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Tag: "hypothesis" at biology news

Robot-based system developed at Carnegie Mellon detects life in Chile's Atacama desert

...a's sensitivity to ultraviolet (UV) radiation. One hypothesis is that the bacteria may have greater UV resistance because they are exposed to extreme UV radiation in the desert environment. This characterization also may explain why such a high proportion of the bacteria from the most arid site are pigmented ?r...

Nanoscale Diagnostic Sets Sights on Alzheimer's

...tool for Alzheimer's disease, and it validates our hypothesis that there are many biomarkers for disease that go under the radar of conventional diagnostic tools. The extraordinary sensitivity of the bar code assay has a chance to change the way the medical community thinks about molecular diagnostics and the m...

Low level of extinction during ice age linked to adaptability

...us did not survive," he said. "The other competing hypothesis is that large fluctuations of sea level, driven by the melting and reforming of glaciers, disrupted marine communities, and the ones which survived were those able to adjust. ...

Strongest proof yet found for prion hypothesis

...t tubes, because what is needed to prove the prion hypothesis completely is to be able to produce this process i... of the paper. "The evidence in favor of the prion hypothesis was strong, but the final proof was still missing. Now we have supplied this proof." Soto emphasize...

Reservoirs may accelerate the spread of invasive aquatic species, researchers say

...sembled communities of stocked fish. An ecological hypothesis known as the fluctuating resource availability hypothesis suggests that these characteristics will enhance the susceptibility of reservoirs to invasion. Becau...

Researchers report new pro-inflammatory role for anti-inflammatory enzyme

...poses." Now, the researchers have validated their hypothesis in vivo using mice that do not produce eNOS. These mutant mice had a marked reduction in iNOS production in response to bacterial endotoxin, as well as lower plasma levels of NO2- and NO3- and less mortality than normal mice. The scientists also show...

The evolutionary triumph of flower power

...y purpose other than emotional satisfaction. "Our hypothesis is that flowers are exploiting an emotional niche. They make us happy," McGuire says. "Because they are a source of pleasure ?a positive emotion inducer ?we take care of them. In that sense they're like dogs. They are the pets of the plant world." P...

Maine Researchers Find Exceptions to Old Rules of Genetic Inheritance

...l number of genes residing in the t haplotype. The hypothesis was logical since the phenomena of transmission ratio distortion and sterility always mapped to the same regions within the t haplotype. To test this hypothesis, the Maine researchers closed in on a region of the t haplotype known to be involved in ...

Migratory songbirds have a specialized night-vision brain area

..., Mouritsen and their colleagues plan to test this hypothesis in more detail, they said. ...

Researchers make surprise discovery that some neurons can transmit three signals at once

...ld be intriguing, but for now this remains just an hypothesis that will require much study, Dr. Gillespie said. The third author of the study is Gunsoo Kim, Ph.D., who is now pursuing post-doctoral studies at the University of California, San Francisco. ...

Newly discovered protein an important tool for sleeping sickness research

...otein called JBP2, which will help them test their hypothesis that a uniquely modified DNA base called base J is...'s mechanism for evading the immune system. If the hypothesis is correct, it will bring scientists closer to developing a more effective drug for treating African...

Breakthrough System for Understanding Ocean Plant Life Announced

...otein called JBP2, which will help them test their hypothesis that a uniquely modified DNA base called base J is...'s mechanism for evading the immune system. If the hypothesis is correct, it will bring scientists closer to developing a more effective drug for treating African...

15 generations of untrained jocks, couch potatoes show big physiological adaptations

... our results provide support for the controversial hypothesis that suggests that physiological systems, such as the oxygen delivery pathway, are, over time, optimized in animals," Kirkton noted. Next steps and implications for human attitudes and therapies Having demonstrated the genetic role in endurance per...

Antiretroviral Therapy May Prevent HIV Transmission From Breastfeeding Mothers To Infants

Two new studies support the hypothesis that combination antiretroviral drug therapy may reduce the risk of mother-to-child HIV transmission through breastfeeding, findings that could have significant implications in the developing world. Researchers in the first study found mothers pass ...

Program finds lost genes in nematode genome

...r analysis of the genome sequence, using that as a hypothesis designing experiments to test the hypothesis. The ...rs have been reluctant to go towards an automated, hypothesis - driven approach because of a lingering sense that anything that's been looked at by a human will b...

Mechanism for the captation of nutrients in plants- unknown to date

...genes involved in the formation of the vesicles ?a hypothesis that is currently being verified. ...

A whole lot of shaking goin' on triggers early hatching in red-eyed tree frogs

...r than the spaces between raindrops." To test the hypothesis that embryos use these features of vibrations to assess danger, Warkentin clumped the rain recordings together into tightly spaced segments, making them more snake-like. Conversely, she spliced bits of stillness into the snake vibrations, making them...

Study shows humans have ability to track odors, much like bloodhounds

...ted, however, provide additional support for their hypothesis that the ability to localize odors to one nostril or the other is realistic. The experiments were conducted with the subjects' heads inside a functional MRI to allow the scientists to see which areas of the brain were most active during sniffing and...

Newly discovered genetic disease sheds light on body's water balance

...kidneys to excrete water excessively. To test the hypothesis that V2 receptors were active in their patients even though vasopressin was absent, Feldman developed an assay for receptor activity. One marker of this activity is an increase in the amount of cyclic AMP (cAMP) within the cell. He worked in the labo...

Identification of specific genes predicts which patients will respond to Hepatitis C treatment

...rapies. "We went into this experiment without any hypothesis about what to look for," said Aled Edwards, a Professor in the Banting and Best Department of Medical Research at University of Toronto with cross appointments in the Departments of Medical Biophysics and Medical Genetics and Microbiology. He is also...

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