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Tag: "strong" at biology news

Getting an evolutionary handle on life after reproduction

...enopause and extended lifespan, the authors make a strong case for using experimental comparative analyses of other species to gain an evolutionary perspective on the human condition. ...

Lethal needle blight epidemic may be related to climate change

...ole pines in northwestern British Columbia present strong evidence in the September issue of BioScience that climate change is to blame for the outbreak. The blight, caused by the fungus Dothistroma septosporum, causes trees to lose their needles and, in the case of the British Columbia outbreak, eventually...

Removing egg from nest may help save endangered whooping crane

...emoved from a nest. Sibling aggression has been so strong that some chicks have been observed pecking the later-born bird to death. Also, a pair of chicks is more likely to attract the attention of a predator and parents can be more attentive if they only have a single chick to protect. Even though long-t...

Russian 'surrogate' alcohols are a killer

...inal substances were about one and a half times as strong as vodka. The third group, including products such as aftershaves, was more than twice as strong as vodka." Both McKee and Shkolnikov believe the study results are highly applicable to other regi...

Seaweed yields new compounds with pharmaceutical potential

...hen prioritized further study of extracts that had strong effects on these disease-causing cells. The Cal...identify the compounds within extracts that caused strong effects against disease-causing cells. Anne Prusak, a former Georgia Tech student and research techn...

Geoscientists follow arsenic from chicken feed to streambeds

...iber said. Despite laboratory findings that show a strong adsorption of inorganic arsenic to minerals in the soils and aquifer sediments, a surprising finding from water samples from streams receiving runoff is that low concentrations of arsenic are transported to streambeds instead of being retained by the...

New class of antibiotics effective against drug-resistant bacteria discovered in fungi

...iber said. Despite laboratory findings that show a strong adsorption of inorganic arsenic to minerals in the soils and aquifer sediments, a surprising finding from water samples from streams receiving runoff is that low concentrations of arsenic are transported to streambeds instead of being retained by the...

Past experience of pheromones induces dominant courtship behavior in fruit flies

...e carried by active adult males. The effect was so strong that males carried on exhibiting courtship dominance behavior until they were five days old. The authors of the study note that similar findings have been reported in mice and hamsters, suggesting that dominance behavior may often be affected by che...

Viagra's hidden help for wildlife

...says Bill von Hippel. "For example, there is still strong demand for tiger bone among TCM apothecaries who use it in the treatment of pain relief, despite the widespread availability of aspirin. "But the failure to achieve an erection isn't comparable to having a headache or the many other ailments for whi...

Compound from marine bacteria shows potential as multiple myeloma therapy

...ples from the ocean floor. The substance has shown strong anticancer properties in laboratory tests. Nereus Pharmaceuticals holds an exclusive license to the compound for drug development. Experiments with NPI-0052 began at Dana-Farber in 2003, said Dharminder Chauhan, PhD, lead author of the paper alon...

Marathon of nano-sprinters

... molecular motors, unlike railways or cars, have a strong tendency to fall off their track and diffuse away into the surrounding aqueous solution. This is a direct consequence of their nanoscale size which makes them rather susceptible to thermal noise. Thus, a single molecular motor can only 'grab' onto th...

Key brain regulatory gene shows evolution in humans

...ll we can conclude now is that this gene is a very strong candidate for having a functional role in human evolution, and that its role probably has something to do with cognition. But beyond that, it's very hard to make a clear argument about specifically what that role is. "We do know that not making enou...

Discovering the first steps in transcription-coupled repair

...itro. In this way they discovered that XPG shows a strong preference for binding to bubbles of just the size typical of transcription -- that is, the size of the bubble opened by RNAPII. Identification of this bubble, which does not progress when RNAPII is stalled, together with direct interactions between ...

Brainstem blocks pain to protect key behaviors

...ipped the other way. Given just before feeding, a strong puff of air ?perhaps indicating a nearby predator -- activated ON cells, and restored pain sensation. Such "predation-related stimuli," the authors speculate, "activate ON cells and thereby evoke a state of vigilant eating without concurrent sensory...

Algal protein in worm neurons allows remote control of behavior by light

... activation of the protein was sufficient to cause strong contraction of the muscle. They found that muscle contraction was simultaneous with light exposure. The researchers went on to show that expression of the engineered ChR2 in mechanosensory neurons, which respond to touch by activating a reflex that...

Cancer support cells may evolve, fuel tumor growth, study shows

...rred in 100 percent of the animals studied. It's a strong selective pressure," Van Dyke said. "Now the whole organ is evolving as a cancer, not just a single population of cells."If the research suggests a need to look at cancer development as a more dynamic process, it also indicates a need for expanding t...

New methods offer insight into regulatory DNA

...e able to identify some regions of the genome with strong disease effects. "The HapMap is proving to be useful in a wide range of applications," commented Dr Panos Deloukas, Senior Investigator, Division of Medical Genetics, Wellcome Trust Sanger Institute. "The journey for our biomedical research is from ...

Research: Snails were overlooked contributors to marsh destruction

...s study adds to a growing body of evidence showing strong top-down regulation of ecosystems processes, including sharks in the Gulf of Mexico and wolves in Yellowstone Park," Silliman said. Native and abundant, dime- to quarter-sized periwinkle snails can often be seen hanging on cordgrass above the water...

No link found between caffeine intake and development of hypertension in women

...o reflect changes in individual behavior. We found strong evidence to refute speculation that coffee consumption is associated with an increased risk of hypertension in women," the authors write. Concerning the link found between colas and hypertension, the researchers write: "? we speculate that it is not...

Plants, too, have ways to manage freeloaders

...leached out. In addition, native Californians used strong thin lupine roots to make snares and fishing nets. In a preliminary study, she, Taylor and Povich used molecular markers to identify the different strains of the bacteria Bradyrhizobia that interact with roots of the six species of lupine found on t...

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