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Tag: "variability" at biology news

One species, many genomes

... more variable than the average gene. "The genetic variability appears to reflect adaptation of local circumstances," says Weigel. It is likely that such variable genes allow plants to withstand dry or wet, hot or cold conditions, or make use of short and long growing seasons. Such genome analyses of unprecede...

Gene therapy delivery of nerve growth factors reverses erectile dysfunction in animal model

...n necessary for sexual intercourse. Because of the variability of symptoms, estimates of the incidence of ED vary but range from 15 million to 30 million affected men in the United States. ED is frequently associated with damage to the cavernous nerve that results from surgery for prostate cancer. Even if a pati...

Extra-aggressive form of idiopathic pulmonary fibrosis identified

...s" patients. "These findings highlight the variability in the progression and outcome of IPF, and may explain, in part, the difficulty in obtaining significant and reproducible results in studies of therapeutic interventions in patients with IPF," said Dr Selman, who is the Director of Research at the Na...

Gene expression patterns predict rapid decline in idiopathic pulmonary fibrosis patients

...e of action." These findings also highlight the variability in the progression and outcome of IPF and may explain, in part, the difficulty in obtaining significant and reproducible results in studies of therapeutic interventions in patients with IPF, noted first author Moisés Selman, M.D., director of researc...

Scientists seek useful traits in wild cottons

...reeding can only be achieved if sufficient genetic variability remains in global breeding stocks. The mission of the center's Crops Genetic Research Facility is to investigate the potential of useful traits lying undiscovered in the gene pool or germplasm of obsolete and wild cottons contained in U.S., ...

Do fruit flies have free will?

... to the same external stimuli, they attribute this variability to random errors in a complex brain." Using a comb...of researchers showed for the first time that such variability cannot be due to simple random events but is generated spontaneously and non-randomly by the brain. ...

The sturdier sex? -- Study by Pittsburgh scientists finds female stem cells work better

...se and could explain, at least partially, the high variability and conflicting results reported in the literature on stem cell biology." Dr. Huard’s team, and the study’s first author, Bridget Deasy, PhD, director of the Live Cell Imaging Lab at Children’s Stem Cell Research Center, made the discovery while w...

Horse genome assembled

...vide scientists with a genome-wide view of genetic variability in horses and help them identify the genetic contributions to physical and behavioral differences, as well as to disease susceptibility. There are more than 80 known genetic conditions in horses that are genetically similar to disorders seen in human...

'Night owls' report more insomnia-related symptoms

...f-report measures of nocturnal sleep, sleep period variability and waking correlates and consequences of insomnia. Compared to the morning and intermediate types, people with insomnia who prefer evening activities (i.e., “night owls? reported the most sleep/wake irregularities and waking distress, even after ...

Moonlighting enzyme linked to neurodegenerative disease

...rrelation does not completely explain the clinical variability because even within the same family we may see individuals with different phenotypes -- one more severe than the other," Dr. Isaya says. In Friedreich's ataxia, clinicians have long hypothesized the existence of gene modifiers -- genes that can in...

Fish growth changes enhanced by climate change

...of long-term climate change and short-term climate variability on the viability of some species. He said correlations for long-lived shallow and deep-water species suggest that water temperatures have been a primary factor in determining juvenile growth rates in the species examined ?Banded morwong, redfish, ...

Satellites shed light on global warming

...precise quantitative indication of the changes and variability associated with the climate system over the past 1...global temperatures have been changing and how the variability of our climate has been changing," Llewellyn-Jones said. "The ATSR instrument produces data of u...

ASU researchers test antibacterial effects of healing clays

... It is this interlayer where much of the elemental variability between clays can be found. And the interlayer surface area is huge (greater than 100 square meters per gram of clay ?bigger than a football field). As a result, surface chemical reactions from these sites have an enormous impact on the geochemistry ...

Lungs try to repair damaged elastic fibers

...eased areas of the lungs, Woods said. There was no variability in elastin levels within the control lungs. Further, the team found that the increase in elastin expression occurred on the alveolar walls, the same area where elastin occurs during the lung's development in children. This shows the lung is attemp...

A buffet for early human relatives

...ournal Science. "We wanted to know if they had variability in their diets on the time scale of a few months t...s robustus is important because it "shows that the variability in human diet has been 'in the family' for a very long time. It is this variability that allows mode...

American scientist's research of life's first cells

...s group as a postdoctoral fellow, and measured the variability and memory of protein levels in human cells. His doctoral research was recognized with a D. N. Chorafas award in 2004 and a J. F. Kennedy award in 2006. Milo is currently a fellow in the department of systems biology at Harvard medical school. In his...

Small, smaller, smallest -- The plight of the vaquita

...ays been rare and that its extreme loss of genomic variability occurred over evolutionary time rather than recently owing to human-caused mortality. Instead of those factors, the “smoking gun?in this instance is accidental mortality in fishing gear, something popularly known as “bycatch? Large-, medium- and s...

Climate change creates dramatic decline in red-winged black bird population

...ion. The NAO is a dominant cause of winter climate variability in the North Atlantic region ranging from central North America to Europe and much of Northern Asia. It has been on an upward trend for the past 30 years. Weatherhead, an ecologist who specializes in the behavior of birds and snakes, says that alt...

Stanford discovery may help predict when toxoplasma can be deadly

...ed in differing levels of virulence, such as high variability of the sequence and the ability to be secreted from the organism to enter the host. This led them to two particularly compelling proteins - ROP16 and ROP18. Both are protein kinases, molecules that are used in the transmission of cellular message...

Commercial fishing causes dangerous fluctuations in fish populations

...stem. Researchers concluded that this increased variability in exploited fish stocks was most likely to be cau...." Professor Beddington adds that the increased variability has serious implications for the way in which fish stocks are managed: "Typically fish populations a...

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