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Tag: "quantify" at biology news

Random gene expression may drive HIV into hiding

...go before it allows more HIV to be made. "When you quantify things and dissect them at this level, it gives you ways of exploring where your most vulnerable places might be." Commenting on the work in a preview article published in the same issue of Cell, William J. Blake and James J. Collins of the Center f...

Researchers predict infinite genomes

... TIGR, we're now going a step further, to actually quantify how many genes are associated with a given species. How many genomes do you need to fully describe a bacterial species?" In pursuit of that question, TIGR scientist Hervé Tettelin and colleagues published a study in this week's (September 19-...

Clear rules needed to govern deep sea bioprospecting: UNU

...d seeps and seamounts. "While it is impossible to quantify the damage caused by such research on the deep seabed environment, threats include destruction of habitats, unsustainable collection, alteration of local hydrological and environmental conditions, and pollution of various nature. The same activities ...

A Father’s Day Gift: Free DNA Paternity Testing

...d seeps and seamounts. "While it is impossible to quantify the damage caused by such research on the deep seabed environment, threats include destruction of habitats, unsustainable collection, alteration of local hydrological and environmental conditions, and pollution of various nature. The same activities ...

NCAR analysis shows widespread pollution from 2004 wildfires

...gely because of unusually warm and dry weather. To quantify carbon monoxide emissions from the fires, the research team used a remote sensing instrument known as MOPITT (Measurements of Pollution in the Troposphere) that is operated by NCAR and the University of Toronto and flown on NASA's Terra satellite. Th...

Solexa and collaborating scientists illuminate the small RNA component of the transcriptome

...nature sequences or sequence tags, to identify and quantify both known and novel small RNA molecules. Many regions of the Arabidopsis genome previously considered to be inactive or featureless were found to be sites of considerable small RNA activity. "The signature sequencing approach makes possible the stu...

Fresh water affected by salt from deicing roads

... over the last 30 years and direct measurements to quantify changes in baseline salinity and predict what would happen if trends of urbanization and deicer use continue. By accumulating in groundwater and aquifers, some water in the northeastern U.S. already exceeds the recommended standard for the protectio...

Logging doubles threat to the Amazon, rivaling clear-cutting, study suggests

...til now, according to the authors. To detect and quantify the amount of selective logging in the five major timber production states of the Brazilian Amazon, the researchers used the new Carnegie Landsat Analysis System. This technology allowed them to delve into each pixel of the image produced by a trio o...

The Antarctic Ocean floor

...bsequent analysis on deck. With this sample we can quantify the number of each species per square metre, its biomass, and so on. Thus it is known as a quantified sample of the ocean floor. When the samples arrive on deck they are washed and classified on board in large groups or rows: sponges, corals, polyqu...

Oil spills and climate change double the mortality rate of British seabirds

...lity rates at a particular colony was difficult to quantify as oil spills usually occur in wintering areas where birds from many different colonies may be distributed over a wide area. However, our long-term monitoring of individually marked birds on Skomer Island has enabled us to see a direct correlation be...

Brain activity related to processing faces is similar in people with, without autism

...g pigment in red blood cells. Researchers then can quantify these signals to generate maps of various brain functions. "The brain regions 'specialized' for face processing, the fusiform gyrus, activated almost identically in our autistic study participants and the control group of individuals without autis...

Why we give: New study finds evidence of generosity among our early human ancestors

...ater in exchange relations." A rigorous effort to quantify the extent and magnitude of different forms of payback in exchange relationships, the study, forthcoming in the February 2006 issue of Current Anthropology, will be critical for resolving heated debates about the function of altruism among hunter-gat...

Technique offers new view of dynamic biological landscape

... Weissman and his colleagues also needed a way to quantify the epistatic effects of interacting mutant genes on the cells' viability. Since yeast form round colonies when grown in culture dishes, they could measure the mutant cells' colony size in an automated fashion and use that to calculate their growth r...

New technique puts brain-imaging research on its head

...er deformation analysis," Bayly said. "We can now quantify brain deformation from these very low, mild accelerations with MRI. We are working with Washington University School of Medicine faculty in hopes of some day developing therapeutic remedies for traumatic brain injuries and concussions. "The most imm...

Scientist measures role of science's coolest player: The snow

...ts on the steady melt of Arctic ice. "I wanted to quantify the influence of global snow cover on the present-day climate because that has relevance for the type of climate changes we are expecting in the future." Vavrus will discuss his findings today during the fall meeting of the American Geophysical Union...

'Bad' enzymes may wear white hats after stroke

...he study's data analysis, and established a way to quantify the response of proteins involved in the cell growth and blood vessel remodeling that occurs after stroke. She also assisted with behavioral studies of rats that had received MMPs to see how well they recovered after a stroke. HHMI medical student f...

Spousal illness can trigger partner death

In the largest study ever to quantify caregiver burden and the widower effect, researchers found that for people aged 65 and older, hospitalization of a spouse can harm the wellbeing of his or her partner and significantly contribute to that partner's death. This risk also varies with th...

Morning grogginess more debilitating than sleep deprivation, according to CU-Boulder study

..., in-patient stay practicing the math test used to quantify sleep inertia. "These were very healthy people who had performed the test hundreds of times, making the results even more profound," said Wright. ...

Aging cells, aging body: Fresh evidence for a connection

...dvanced online edition of Science, is the first to quantify the presence of replicatively senescent cells in any species. "For 40 years, we've known about replicative senescence," said John Sedivy, a Brown professor of medical science and the senior scientist on the project. "Whether it promotes the aging of...

Genes affecting blood pressure change as children become adults

... complex mathematical modeling made it possible to quantify the role of genetics. They found genetics played a moderate to high role, explaining between 25 and 64 percent of the individual differences in blood pressure and hemodynamics, Dr. Snieder says. Genes also played a major role ?between 60 and 100 pe...

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