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Tag: "long" at biology news

Low oxygen likely made Great Dying worse, greatly delayed recovery

...eeks. You can go without water for a few days. How long can you go without oxygen, a couple of minutes? There's nothing with a greater evolutionary effect than oxygen." ...

Scientists reveal the shape of a protein that helps retroviruses break into cells

...eeks. You can go without water for a few days. How long can you go without oxygen, a couple of minutes? There's nothing with a greater evolutionary effect than oxygen." ...

Unchecked DNA replication drives earliest steps toward cancer

...tumor progression. "Scientists have debated for a long time whether very early precancerous cells are genetically unstable, whether they have an unusually high mutation rate. What we show in this study is that they do have a higher mutation rate than normal through this mechanism." Fortunately, cells ha...

Successful Test Of Single Molecule Switch Opens The Door To Biomolecular Electronics

...t that physicists have been trying to detect for a long time: negative differential resistance in a single molecule attached to electrodes. The specifically designed molecule, a hepta-aniline oglimer, belongs to a group of molecules that biochemists believe to be capable of being molecular switches but t...

Too much water may be as dangerous as too little during long-distance athletic events

...ter station and take a drink. Over the course of a long race, they can dilute themselves." In addition po...ation of sodium in runners both before and after a long race and examines their risk factors for developing hyponatremia. It recommends individualized fluid...

A New Species of Monkey is Discovered in Tanzania: The First in Africa for More Than 20 Years

...e temperatures frequently drop below freezing; its long coat is probably an adaptation to the cold. The taxonomic name of the species, Lophocebus kipunji, recognizes the monkey’s local Kinyakyusa name (pronounced kip-oon-jee) used by a few hunters around Mt. Rungwe. The highland mangabey is extremely rare...

Bush, Cheney and Rumsfeld are now species of slime-mold beetles -- but strictly in homage

...ter station and take a drink. Over the course of a long race, they can dilute themselves." In addition po...ation of sodium in runners both before and after a long race and examines their risk factors for developing hyponatremia. It recommends individualized fluid...

New design : complete

...ter station and take a drink. Over the course of a long race, they can dilute themselves." In addition po...ation of sodium in runners both before and after a long race and examines their risk factors for developing hyponatremia. It recommends individualized fluid...

Stealth Worms May Improve Insect Pest Control

...niles also can survive dry conditions in soils for long periods of time before they infect more insects. This naturally-occurring relationship between the nematodes and their mutualistic bacteria has existed for millennia. EPNs are found in terrestrial environments, including deserts, rainforests, grassl...

Molecular messengers perform a crucial role in the ability of injured nerve cells to heal themselves

...al themselves. A nerve cell has a cell body and a long extension, called an axon, which in humans can reach up to one meter in length. Nerve cells belonging to the peripheral nervous system can regrow when their axons are damaged. But how does the damaged axon inform the cell body that it must start prod...

Radio-tracking associated with 'dramatic shift' in water vole sex ratio

...deprived water voles," they say. Researchers have long been aware that the techniques they use had the potential to cause unexpected effects, and there have been many studies into the effects of radio-collars. However, this is the first study to show an association between radio-collars and sex ratio, al...

What the eye doesn't see

...dy's outline was rapidly adopted by many armies as long ago as the First World War. And in biology this idea of 'disruptive colouration' has long been used to explain how insects such as moths conceal themselves from predators, shaping the evolut...

Alarm pheromone causes aphids to sprout wings

...ease an alarm pheromone, (E)-â-farnesene, that has long been known to cause other aphids to walk around or drop from the plant. In a paper soon to appear in Ecology Letters, researchers at the University and Max-Planck-Institute in Jena, Germany, now show that exposure to alarm pheromone also causes pea ...

Ancient immune defense mechanism is no match for HIV-1

... HIV-1 molecule. Identification of what might be a long sought after weakness in the virus may have applic...ocessed by a protein called Dicer, which chops the long strands of RNA into smaller pieces, resulting in the production of an RNA-induced silencing complex ...

Where bacteria get their genes

... gene transfer, unique to the bacterial world, has long been recognized as common. But until now scientists did not know which of a bacterium's genes came from lateral gene transfer and which had been inherited from its parent. In their study, the scientists focused on the best-studied group of bacteria,...

NHGRI targets 12 more organisms for genome sequencing

...that most sequences of the human genome originated long before humans themselves. Consequently, scientists will use the genome sequences of the 11 non-mammalian animals to learn more about how, when and why the human genome came to be composed of certain DNA sequences, as well as to gain new insights into...

Chimp genome reveals a retroviral invasion

It's been known for a long time that only 2% -- 3% of human DNA codes for pro...g, pol, and env -- and regulatory sequences called long terminal repeats (LTRs). To further explore the evolutionary history of the retroviral elements, the...

Scientists analyze chromosomes 2 and 4

...nome Project along with the DOE. Chromosome 4 has long been of interest to the medical community because it holds the gene for Huntington's disease, polycystic kidney disease, a form of muscular dystrophy and a variety of other inherited disorders. Chromosome 2 is noteworthy for being the second largest ...

Rabies spread speeds up

...ed their model to estimate the potential impact of long distant translocations, such as the occasional garbage truck ride. They estimated that rabies would take just 33 months to spread across central Ohio - compared to 48 months to cross the much smaller state of Connecticut - and cover the state within ...

Ebola virus: from wildlife to dogs

...he Ebola virus has probably been circulating for a long time in Central African forests. The detection of such antibodies in other primate species (including 5 drills, 1 baboon and 1 mandrill) suggests that circulation of the virus involved many contamination events between distinct animal species. Thus, ...

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