Tag: "continuum" at biology news

Alzheimer's disease is not accelerated aging

...her typical aging and Alzheimer's disease are on a continuum or distinct," explained lead author and HHMI research associate Denise Head. The researchers used MRI to measure the volume of two regions of the brain previously linked with age-associated changes: the corpus callosum, and the medial temporal lobe. ...

Study reveals evolution on the (butterfly) wing

...rns they studied vary among species, existing in a continuum including simple lines, teardrops and rounded spots. Reed is currently at Duke University, and Serfas is at the University of Wisconsin at Madison. Their work was supported by the National Science Foundation and the Human Frontier Science Program. Sa...

White House lauds Physiological Society for mentoring underrepresented minorities in biomedicine

...nitiatives across multiple levels of the education continuum to: develop long-term targeted programs for minority students and teachers; increase diversity among physiologists; and monitor the progress of minorities in the field of physiology." APS Executive Director Dr. Martin Frank said: "The Society's prog...

What it Takes: Design principles to broaden participation in SET

...-ribbon panels worked in parallel across the whole continuum of education and workforce development. Based on available research evidence and the professional judgment of 120 nationally recognized practitioners and researchers, the higher education assessment: Makes the case for national action to meet the U....

Is that plant a tortoise or a hare? Answer predicts its response to environmental change

...ong" approach. A new study has revealed the global continuum of leaf economics, documenting where 2,548 species...ic strategies. Moreover, a plant's position on the continuum predicts how it will likely respond to climate change and other factors. The work will be published ...

Risk of preeclampsia rises sharply with increased pre-pregnancy body mass index

...method of calculating percentage of body fat) as a continuum rather than simply by conventional classification units. It also is the first study to try to determine the mechanisms by which body fat increases preeclampsia risk. Preeclampsia affects about 7 percent of first pregnancies nationwide, and is charact...

New study of land use effects on amphibian populations gets underway at UGA laboratory

...omly assigned a different treatment representing a continuum of disturbance: 1) complete clearing with coarse woody debris (CWD) removed, 2) clearing with coarse woody debris retained, 3) partial cutting (e.g., thinning), or 4) uncut forested control. Quadrants will be allowed to undergo succession in subseque...

An unexplored genomic terrain in a handful of dirt

...es. Now, we might rethink that classification as a continuum of genes that are predominantly bacterial or phage." The researchers' findings also suggest how phages mix their genes to produce the widely varied "mosaic" structure of their genomes. One theory posits that the genomes possess specific "linker" sequ...

Newly revealed viral structure suggests a continuum in the evolution of viruses

...ructural Biology, suggest that viruses developed a continuum of progressively more complex architectural strate...ler viruses and reinforce the idea that there is a continuum of viral architectures running through viruses that infect such different hosts as bacteria, plants,...

New data shows weight loss with Xenical provides benefits for type 2 diabetes patients

...ents at five different baseline HbA1c levels (on a continuum from 7% to 11%)2. Patients receiving Xenical had significantly greater decreases in HbA1c than patients on placebo. Patients with the poorest glycaemic control (HbA1c level 11%) experienced the greatest reduction in HbA1c levels (-2.2% Xenical vs -1...

Office of Naval Research awards $8.4M to young investigators

...behavior with microscopic failure mechanisms and a continuum damage model that captures the details of ductile failure. The research is critically important in understanding damage mechanisms and design techniques in structures such as buildings and ships. Dr. James A. Hansen, Earth, Atmospheric and Planetary...

Biting may drive division of labor among social wasp workers

...cape. "These are not different behaviors but a continuum of the same behavior, and the intensity of biting can transition to a more aggressive form," said O'Donnell. In addition, he observed that some individuals were the victims of simultaneous or serial biting. As many as six wasps were observed bit...

The little protein that could

...said Aschner, explaining the study's position in a continuum of alcohol research. "This is a mechanistic study trying to elucidate metallothionein's function relative to alcohol's neurotoxicity. This doesn't mean that we can start manipulating people's genes, putting more metallothionein in their genetic mak...

Tracing the evolution of sex chromosomes

...place the differentiationevents on an evolutionary continuum with respect to the evolution of otheranimals. For example, they learned that the first strata differentiated 240 to320 million years ago, shortly after the ancestors of mammals parted companywith the ancestors of birds. The second strata different...

Genetic, Familial Factors Influence ADHD, Not Necessarily Sex Of Child

...dd says. "Our studies and others suggest a similar continuum inADHD." Some studies estimate that almost one in 10 school-age children is affected byADHD. Why they have the disorder, who should be treated and whether girls areunder diagnosed are some of the questions the investigators hope to answer asthey look...

University Of Cincinnati Geologists Analyzes Evolutionary Impact Of Mass Extinctions

...ctions are simply the most globally extensive of a continuum of abrupttransitions thatcombine to affect overall global diversity. The Phanerozoic covers the pasts 540million years. That view is in contrast to Stephen Jay Gould and others who have viewed massextinctions as anover-arching tier of evolutionary p...

Human-Like Ability, Categorical Perception, Found In Insects

...'pa,' " Wyttenbach noted. "Even though there is a continuum of variation between 'ba' and 'pa' based on voice onset time or VOT, which instruments can detect, our ears don't discriminate. We hear either 'ba' or 'pa' and that's how we label it. That is categorical perception, and it looked like crickets migh...

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