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Tag: "extreme" at biology news

The penalty of having a sister -- why sibling sex matters for male saiga antelopes

...ns of saiga, from both before and after the recent extreme decline in saiga numbers ?yet the results of both datasets are qualitatively the same. The research team, alongside local rangers, weighed and measured saiga calves during the birth season in May over a period of three years. Saiga have a mass ca...

Mine runoff continues to provide clues to microbial diversification

...e environmental conditions ?a pH of 0.8 -- are too extreme for most organisms to survive. A pH level of 7 is considered neutral and most proteins prefer pH levels between 5 and 7. In addition, the water from the mine often exceeds 120 degrees Fahrenheit. Because of their simpler makeup, the Banfield Laborato...

Rapid response was crucial to containing the 1918 flu pandemic

...ult, peak mortality rates were higher. In the most extreme disparity, the peak mortality rate in St. Louis was only one-eighth that of Philadelphia, the worst-hit city in the survey. In contrast to St. Louis, Philadelphia imposed bans on public gatherings more than two weeks after the first infections were r...

Discovery of new cave millipedes casts light on Arizona cave ecology

...nt of Biological Sciences at NAU, said, "Caves are extreme habitats that have received far too little attenti...be used to find caves on Mars. He is also studying extreme cave-adapted life forms by characterizing their habitats to determine how they exist in the nutrient...

UCLA study uncovers clues for why Graves' disease attacks the eyes

...ssue behind the eye, causing them to protrude. In extreme cases, patients experience trouble closing their eyelids, severe double vision, corneal scarring, optic nerve damage and even blindness. Graves?disease is nine times more common in women than men. The disorder most often strikes during the chil...

Latent memory of cells comes to life

... which living cells with identical DNA can achieve extreme differentiation. The research at the ‘Models of Life?Basic Research Center at the Niels Bohr Institute has shown that communication between nucleosomes and positive feedback are likely to constitute fundamental memory mechanisms in individual cell...

Cancer patients monitor fatigue in real time

...ytic leukemia may seek medical care because of the extreme fatigue," Hacker said. "Cancer can cause fatigue directly or indirectly by spreading to the bone marrow, causing anemia and by forming toxic substances in the body that interfere with normal cell functions. "People who are having problems breathin...

Protein enables discovery of quantum effect in photosynthesis

...ic of this energy transfer process can explain its extreme efficiency, in that vast areas of phase space can ...udy. "This wavelike characteristic can explain the extreme efficiency of the energy transfer because it enables the system to simultaneously sample all the pot...

Scripps research team sheds light on long-sought cold sensation gene

...not lose their ability to feel pain in response to extreme cold, as evidenced by responses similar to wild type mice when exposed to -1° C cold plates. This suggests that other genes are responsible for this facet of cold sensation. Though cold can be unpleasant or painful under certain circumstances, it ...

Ants show us how to make super-highways

...e quantitative evidence from animal societies that extreme specialisation by a minority can significantly improve the performance of a majority to benefit the group as a whole. It also suggests that these benefits are a consequence of the unusual and derived foraging strategy of the army ant (Eciton burchell...

Genome of Clostridium botulinum reveals the background to world's deadliest toxin

...opportunity arises. "C. botulinum shows us one extreme of the ways that bacteria can make the most of animal hosts," explained Dr Julian Parkhill of the Wellcome Trust Sanger Institute. "Some organisms use subtle approaches, elegantly choreographing their interaction with us and our defences. "C. botu...

CU study reveals why starling females cheat

...er by doing less work in raising the chicks, or in extreme cases, leaves her to raise the chicks on her own. But because superb starlings, a bird common to East Africa, are cooperative breeders, females have more incentive to stray, said Rubenstein, because even if she is caught cheating, she still may get h...

The kapok connection -- Study explains rainforest similarities

...ibution of Ceiba pentandra. Dick concluded that extreme long distance travel by wind or ocean currents explains how the trees spread from South America to Africa. He plans to continue investigating the role of oceanic dispersal to see if the same is true for other species and for entire plant communities....

Runners -- Let thirst be your guide

... exercise. Another is nausea, a common reaction to extreme sports, which makes the body think vomiting will ensue, so water needs to be conserved, Verbalis says. Finally, a research team that included Verbalis recently reported in the American Journal of Medicine that release from muscles of a cytokine kno...

Researchers shed light on shrinking of chromosomes

...pose the DNA to serious mechanical damage.” The extreme condensation of chromosomes towards the end of cell division can also serve as a safety net if something goes wrong with chromosome separation in earlier phases of division. When the researchers added chemicals to the cell to block the late condensat...

Researchers track how spores break out of dormant state

...tough spore coat, have a significant resistance to extreme environmental factors including heat, radiation an...ases, such as Alzheimer’s and prion diseases. “The extreme physical and chemical resistance of Bacillus spores suggests that evolutionary forces have captured ...

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