Tag: "correlation" at biology news

Beating pneumonia by a nose

... pattern recognition algorithms and assessed for a correlation between the actual CPIS scores and the one predict...cted and those who were not. "The data show good correlation between the actual scores and those predicted by the data from the e-nose sensor," said Hanson. "Fur...

Estrogen linked to more efficient regulation of a woman's heartbeat

...term resting R-R intervals was performed using the correlation dimension (CD), approximate entropy (ApEn), and largest Lyapunov exponent (LLE). Evidence of nonlinear structure was obtained by the surrogate data test. CD, ApEn, and LLE were negatively correlated with age. Results The short-term heart rate varia...

Study predicts Amazon deforestation could affect climate in US

... to March. Of particular interest is that we see a correlation with climate changes, primarily reduced precipitation, in other parts of the world." Avissar said the simulation showed a noticeable reduction of precipitation -- 10 percent to 15 percent -- during the summer in the Dakotas of the United States and ...

Visualising potential outcome of cancer treatment

... and after chemotherapy. They found a significant correlation in the water diffusion properties prior to treatment with the subsequent growth rate of the tumour. There is a great deal of scientific interest in tissue characterisation for diagnosis and the prognosis of cancer treatment. "In the future, we hope...

November GEOLOGY and GSA TODAY media highlights

...blages), are ideal for study because they minimize correlation uncertainty. From a synthesis of high-resolution sediment records from eastern Canada and Europe, the authors have shown that plant community composition responded within 0 to 200 years to the abrupt climate events accompanying the last deglaciation...

Is there a link between soy formula and attention deficit disorder?

...icient in ADHD. "While this study shows a definite correlation between high manganese and lower dopamine levels, we still need to see whether high manganese doses result in permanent behavioral problems, including ADHD," Crinella said. "While soy milk by itself is not harmful, manganese can be removed through a ...

Biologists new experiment may vindicate Darwin

... choice again. Initially, Fry does not expect much correlation between bristle number and the individual's prefer...eding and 50 to 60 generations, Fry hopes to see a correlation between brightness preference and bristle number. Already, a weak correlation is appearing after jus...

Alzheimer's disease may originate in the brain's white matter

...ted with higher risk of Alzheimer's, also showed a correlation with greater demyelination. Roher says he hopes that Alzheimer's researchers will expand their area of interest to include white matter: "Only if the full extent of Alzheimer's disease pathology is known will present attempts to intervene in the prog...

Overlapping genetic and archaeological evidence suggests neolithic migration

...figurine is there or it isn't. The strength of the correlation is driven by the strength of our measures." ...King said. The researchers found a strong correlation in their study between the Y-chromosome mutations and the presence of certain artifacts. Nonetheless...

Tomorrow's super robots may owe their mobility to a cockroachs legs today

...of leg response assume linear viscoelasticity. The correlation between these models and the results of the experiments is relatively good at low frequencies and small displacements, but deteriorates at higher frequencies and displacements as nonlinear effects grow pronounced. In addition, at very low frequencie...

A mane is a pain, but worth it for male lions

...d and had blood samples drawn, they found a strong correlation between blood testosterone levels and mane color. ...es and males would be intimidated. But there is no correlation between testosterone and mane length. We figure males are sensitive to an opponent's mane length bec...

City birds prefer rich neighbors

... lower where tree abundance is higher. The lack of correlation between trees and the bird populations is important, Kinzig notes, because the variety and number of trees planted are among the few significant variables present in the make-up of the parks themselves, and could be affected by economic factors. Tree...

New insights into insect antimicrobials point the way to novel antibiotics

...eir previous investigations, they found a complete correlation between the peptide binding to a small fragment of bacterial DnaK and bacteria killing. The researchers also confirmed that the peptide does not bind to the mouse or human protein equivalents to DnaK, further suggesting that the peptide would not be ...

'Fowl-howl' ties discovered between birds, monkeys

TUCSON, ARIZ. -- A strong and unexpected correlation between large numbers of howler monkeys and elevat...irds," Feeley noted. "So we have a strong positive correlation between the two groups." The reasons are less than obvious, because howler monkeys are strictly veg...

The effects of human-caused atmospheric changes on tropical forests

...e rises. Data from La Selva show a strong negative correlation between tree growth and higher temperatures. Temperatures experienced by canopy leaves may be close to the point at which respiration exceeds photosynthesis so that net production of CO2 results. Positive feedback between higher temperatures and CO2...

New gene may be breast-specific cancer markers

... the study revealed that: A significant positive correlation exists between expression of MGA and LPB in breast carcinomas. MGA was found more frequently in estrogen receptor-positive versus estrogen receptor-negative carcinomas (72 percent vs. 45 percent). LPB had the same relationship, while MGB displayed ...

Stem cells could determine how long we live

...ays Hartmut Geiger. He and Van Zant think the same correlation between longevity and stem cell hardiness will be found in all mammals. All cells have mechanisms for repairing their DNA, which is under constant barrage from everything from radiation to free radicals. The notion that ageing happens because genetic...

Physics tip sheet #21 July 10, 2002

... distribution of objects within our galaxy shows a correlation between UHECRs and spun-up pulsars (pulsars spinning at high speeds) that is better than chance should allow. Although this does not imply pulsars are the source of UHECRs, it provides impetus not to dismiss galactic sources and to investigate pulsar...

Deformed frogs form when parasites and pesticides combine

...posed to pesticides." The researchers had found a correlation with pesticides, but they needed to do the laboratory experiments in order to establish with certainty that pesticides were the cause of the different rates of deformities. "The lab experiments show that pesticides can weaken the immune response of ...

Gene profiles predict survival

...med molecular signatures that had an even stronger correlation with survival after chemotherapy. The predictive power of the molecular signatures was independent of the international prognostic index. From 12,000 to 17 genes DNA microarrays reflect the activity of tens of thousands of genes in a sample of ti...

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