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Tag: "analyzed" at biology news

Dirty snow may warm Arctic as much as greenhouse gases

...perature response there.” Previous studies have analyzed dirty snow’s effect on climate, but this is the first to take into account realistic emissions from forest fires in the Northern Hemisphere and how warming affects the thickness of the snow pack. In some polar areas, impurities in the snow have ca...

Sun exposure early in life linked to specific skin cancer gene mutation

...rements. DNA from the patients' melanomas was then analyzed for mutations. Patients with melanomas that contained the BRAF mutation, found in about half of all melanomas, were more likely to report high levels of sun exposure before age 20. People with the NRAS mutation were more likely to have had high ex...

Genetic factors are linked to fever following smallpox vaccination

...m developed fevers after vaccination. The authors analyzed 19 gene clusters (called haplotypes) linked to the body’s response to viral infections. The new study identified a total of eight haplotypes in four different genes that were associated with altered susceptibility to fever after vaccination. It is...

New findings challenge established views on human genome

...DE consortium generated more than 200 datasets and analyzed more than 600 million data points. “Our results reveal important principles about the organization of functional elements in the human genome, providing new perspectives on everything from DNA transcription to mammalian evolution. In particular, ...

Study finds mix of disease processes at work in brains of most people with dementia

...unaware of the results of the clinical evaluation, analyzed each person’s brain. The autopsies showed that about 85 percent of the individuals had evidence of at least one chronic disease process, such as Alzheimer’s disease, strokes, Parkinson’s disease, hemorrhages, tumors, traumatic brain injury or others....

In nature, proteins sweep up nanoparticles

...ivermore National Laboratory. The research team analyzed a biofilm rich in zinc sulfide that was collected ... Fourier-transform infrared spectroscopy, the team analyzed the zinc sulfide aggregates and detected the characteristic signal of proteins. Next, to further ...

Research finds that circadian rhythms dominate all life functions

...ivity. As a checks-and-balances procedure, Ptitsyn analyzed the sets of data with several mathematical approaches to achieve the same results. The research also shows that gene oscillation is significantly more organized when mammals are exposed to regular periods of day and night. Oscillation can become ch...

Scientists close in on missing carbon sink

...e global carbon cycle, Stephens and his colleagues analyzed air samples that had been collected by aircraft ac...be for the past 27 years. The air samples had been analyzed by several labs around the world, which used them to investigate various aspects of the carbon cycle...

Lessons from the orangutans: Upright walking may have begun in the trees

... them travel on these branches. The researchers analyzed nearly 3,000 examples of observed orangutan movement, and found that the orangutans were more likely to use hand-assisted bipedalism when they were on the thinnest branches. When bipedal, the animals also tended to grip multiple branches with their l...

Resistant HIV quickly hides in infants' cells

...d colleagues working throughout the United States, analyzed HIV-infected infants less than six months of age enrolled in a large, multi-center clinical trial covering 10 states. Their results showed that five of 21 HIV-positive infants were infected with drug-resistant HIV transmitted from their mothers—a ...

Early exposure to indoor fungus molecules may protect infants against future allergies

...sistent coughing and wheezing." The UC-led team analyzed the effects of microbial exposures to both fungal ...mples from each infant’s primary activity room and analyzed them for indoor allergens, fungal glucans and bacterial endotoxins. They also gathered information a...

Hearts of male and female rainbow trout are different

...was used to capture images of ventricle layers and analyzed for layer cross-sectional areas. Lactate concentration and net lactate release from cardiac tissue was also examined. Results The researchers found: ventricle strips from males and females had similar rates of oxygen consumption a...

Alien plants attack using 'resource conservation' as weapon, researchers say

...sis and water-use rates. Later, they ground up and analyzed the leaves in a laboratory to determine nutrient content. By calculating the ratio of resource use to the rate of photosynthesis, the scientists were able to determine the resource-use efficiency for each plant. "Invasive plants were more efficien...

Scientists: As rainfall changes, tropical plants may acclimate

...e forest sites in a single day." The scientists analyzed nitrogen isotopes in the soil and leaf samples of four plant species at each site. They learned that drier soils contained more nitrogen in the form of nitrate, while wetter soils contained more nitrogen in the form of ammonia. Isotopic analysis of t...

Newborn neurons like to hang with the 'in' crowd

...—tiny feelers that probe the environment. "When we analyzed them in three dimensions, the tip of the filopodia was preferentially associated with synapses already connected to other neurons," explains Toni. However, as the new neurons matured, the tiny tips filled out and started to monopolize the synaptic...

Gene mutation linked to cognition is found only in humans

...Academy of Sciences in Kunming, China, researchers analyzed the DNA of humans and several species of apes and monkeys. Their previous work had shown that type II neuropsin, a longer form of the protein, is not expressed in the prefrontal cortex (PFC) of lesser apes and Old World monkeys. In the current study,...

Effect on breast tumors of DNA alternations in 3 genes described

...to the development of cancer." The researchers analyzed methylation status in three genes, known as E-cadherin, p16 and retinoic acid B2 receptor (RAR-B2), using tissue samples from 887 breast cancers. The samples were taken from women 35-79 years old who participated in the Western New York Exposures and...

Scientists seek useful traits in wild cottons

... or fiber, these cottons produce is also measured, analyzed and recorded. The lint is hand-, saw- and roller-ginned, and then characterized using high volume instrumentation and the advanced fiber information analysis system. The Lubbock scientists enter this information into a genetic database which...

Do fruit flies have free will?

...quately model fly behavior. Only after the team analyzed the fly behavior with methods developed by co-authors George Sugihara and Chih-hao Hsieh from the Scripps Institution of Oceanography at UC San Diego did they realize the origin of the fly's peculiar spontaneity. "We found that there must be an evolv...

Revealing the machinery underlying the 'plastic' juvenile brain

...xposed the animals to episodes of normal light and analyzed the response in the genetic machinery of the visual cortex in each animal's brain. They found that the brains of the juvenile mice showed activation of specific genetic mechanisms that the adult brains did not. Specifically, the researchers found ...

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