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Tag: "never" at biology news

UGA scientists unravel 'molecular inch-worm' structure of walking-pneumonia bacterium

... of movement that has been known for some time yet never entirely understood. The cells seem to bend and flex, but it's unclear how that is accomplished. The new data indicate that gliding is essential for cell division in M. pneumoniae. "In addition to its significant impact on public health, M. pneumon...

Halving daily cigarette quota has no health benefit

...er two decades. Participants were classified as never smokers; ex smokers, quitters (those who gave up between the first and second check); moderate smokers (1 to 14 cigarettes daily); reducers (more than 15 cigarettes a day, cut by more than half at the second check); and heavy smokers (more than 15 ci...

MIT finds most complex protein knot ever seen

...d 32,853 proteins, using a computational technique never before applied to proteins at this scale. Of those that had knots, all were enzymes. Most had a simple three-crossing, or trefoil knot, a few had four crossings, and the most complicated, a five-crossing knot, was initially found in only one protei...

Ground spider diversity studied in research project

...n all of her collecting and studies, Henderson has never been bitten, although she has had a skin irritation caused by a rosehair tarantula flicking off some of its abdominal hair, she said. Henderson hopes her studies will be a stepping stone to a new career when she graduates in May. "There are few ara...

High dopamine transporter levels not correlated with ADHD

...ansporter levels in 20 adult ADHD subjects who had never received medication, never abused drugs (except nicotine), and had no past or present history of mental or neurological disease...

Viral marker of human migration suspect

...he differences in their evolutionary histories has never been fully tested. Shackelton and her colleagues analyzed 333 genetic sequences of the virus and reconstructed their evolutionary history. They then compared this history to the reconstructed history of human populations, based on mitochondrial DN...

New genetic analysis forces re-draw of insect family tree

... just four groups of insects but, surprisingly, we never knew for sure how they are related to each other,"...f Bath, who lead the research. "While there was never unequivocal evidence for it, scientists believed for a long time that, based on morphology, flies an...

Tests for 'face-blindness' reveal disorder may not be so rare

...le to recognize faces as well as others; they have never recognized faces normally so their impairment is not apparent to them," says Russell, a postdoctoral researcher in Harvard's Department of Psychology. "As a result, many individuals do not recognize their prosopagnosia until adolescence or adulthood....

Master planners in brain may coordinate other areas' roles in cognitive tasks

...them a cup of coffee, they'll drink it, but they'd never ask for a cup of coffee," Petersen explains. "If you ask them how they are, they'll tell you, 'I'm fine,' but they won't tell you a story." "They seem to have problems voluntarily entering a task state," Dosenbach says. "They can do tasks with very ...

New mechanism explains glucose effect on wakefulness

...llular glucose that occur between normal meals has never been tested, the daily physiological relevance of their glucose sensing is also unknown." In their experiments, the researchers engineered mice to produce a fluorescent protein only in orexin neurons. Thus, the researchers could isolate the neurons ...

UWM brain research supports drug development from jellyfish protein

...me as an indicator of calcium. But the protein has never been tried as a treatment to control calcium levels. Underwood believes his company is at about the 12-year mark in the typical 15-year cycle for a new drug to be developed. Moyer's research centers on brain changes that occur as a result of aging...

Test reveals effectiveness of potential Huntington's disease drugs

... drugs side-by-side in the same HD model. That has never been done before," said Dr. Bezprozvanny. Huntington's disease is a fatal genetic disorder, manifesting in adulthood, in which certain brain cells die. The disease results in uncontrolled movements, emotional disturbance and loss of mental ability...

MIT engineers probe spiders' polymer art

...spiders.) "This is pretty scary," he said. "I'd never seen a spider this big. I never grew up around anything with furry knuckles." But he quickly settled into dissecting the peanut-size...

Ghost protein leaves fresh tracks in the cell

...ob," said Dubreuil. "This hints at a complexity we never had any idea about in trying to understand how these molecules work." Dubreuil and his colleagues initially assumed that ankyrin was the key to targeting spectrin in all cells. But research in many laboratories had failed to find a cue for targetin...

No-mow grass may be coming to your yard soon

...f horticultural accomplishment would be grass that never grows but is always green. Now, that vision of suburban bliss -- and more -- seems plausible as scientists have mapped a critical hormone signaling pathway that regulates the stature of plants. In addition to lawns that rarely require mowing, the f...

Cutting calories slightly can reduce aging damage

...t RNA is a very good marker of aging damage. "I'd never really thought about RNA before," Holloszy said. "Research has always looked at DNA. Because RNA is the template for the information on the genes on the DNA, RNA damage is a major problem because it results in mutations in the transcription of protei...

Diabetes research takes wing thanks to long-lived fruit fly

...in other ways. And many of these experiments could never be done in people or even mice. Working first in fruit flies speeds up the process toward finding potential treatments or cures for diseases like cancer." ...

New method confirms importance of fungi in Arctic nitrogen cycle

...rom photosynthesis, but the rates of transfer have never been quantified in the field. John and Erik Hobbie's study, published in the April 2006 issue of the journal Ecology, quantifies the role of mycorrhizal fungi in nitrogen cycling for the first time through measurements of the natural abundance of nit...

Dopamine drug leads to new neurons and recovery of function in rat model of Parkinson's

...f PD, but this effect is difficult to test and has never been proven, says Dr. Eckman. While these drugs are useful in treating the symptoms of PD, they have not been designed to prompt development of new neurons, he adds. Altering how the current drugs work or developing new compounds to enhance neuroge...

New treatment for food poisoning

...was not effective in the laboratory, this drug has never been considered for the treatment of listeriosis, ...iotic, fosfomycin. As a consequence, this drug has never been considered for the treatment of listeriosis. Dr Mariela Scortti, lead author on the paper, add...

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