Tag: "contrary" at biology news

Microscopic jets, diamonds unlikely on Uranus, and amazing mosquito legs

...nets such as Uranus and Neptune. The conclusion is contrary to recent speculation that small diamonds would spontaneously form in carbon rich layers of the gas giant planets. White dwarf stars, according to the study, are veritable diamond factories. Physicists at the Universtiet van Amsterdam and the FOM I...

Cells take risks with their identities

...ays loose at the beginning of many inactive genes, contrary to textbook models. Whitehead postdoctoral researchers Matthew Guenther and Stuart Levine screened the entire human genome for a chemical signaturea landmarkthat corresponds with this looser DNA packaging configuration and thus with transcription i...

Greenland's ancient forests shed light on stability of ice sheet

...go) when the temperature was 5C warmer than today, contrary to the view currently held by scientists. Professor Dorthe Dahl-Jensen, also at the University of Copenhagen, has shown that in fact, even during this interglacial period, the ice thickness at Dye 3 would have been reduced to between 1 km to 1.5km. ...

Endometriosis increases the risk of certain cancers

...r given birth and those who had. We found that, contrary to what one might expect, endometriosis and nulliparity did not combine to give a higher risk of cancer, said Dr Melin. The researchers found that endometriosis increased the risk of developing ovarian cancer by more than a third (37%) above the ri...

The mouflons of the Kerguelen archipelago

...the animals genetic diversity increased over time, contrary to what the usual models predict. These results contradict the belief that a population descended from a small number of individuals will exhibit numerous deficiencies and reduced genetic diversity. http://www.video.uqam.ca/kerguelenmouflons The...

Study could impact noninvasive treatment of cancer tumors

... to cells suspended in a culture medium. However, contrary to their initial hypothesis, Devireddy and Monroe found that the nanoparticles did not significantly change the freezing response of either HeLa cells, which are derived from a specific cervical cancer cell line, or Jurkat cells, cancer cells commonl...

New findings challenge established views on human genome

...start sites for DNA transcription. Evidence that, contrary to traditional views, regulatory sequences are just as likely to be located downstream of a transcription start site on a DNA strand as upstream. Identification of specific signatures of change in histones, which are the proteins that organize D...

New findings challenge established views about human genome

...or transcription and new regulatory sequences that contrary to traditional views are located not only upstream but also downstream of transcription start sites. Other surprises in the ENCODE data have major implications for our understanding of the evolution of genomes. Until recently, researchers had thoug...

Flaws in colonoscopies may increase risk of colon cancer

... due to problems with bowel preparation. However, contrary to popular belief, aborted examinations due to discomfort in the elderly are rare," said Kinesh Patel, MBBS, of Imperial College Faculty of Medicine, and lead author of the study. "Strategies to improve bowel preparation will help increase the effec...

Bat flight generates complex aerodynamic tracks

...e lift and maneuverability, quite unlike birds and contrary to many of the assumptions that aerodynamicists have used to model animal flight, according to University of Southern California aerospace engineer Geoffrey Spedding. The researcher, together with a multi-institutional team of scientists found that...

Researchers from the UGR use a bacterium to obtain biopreservatives from food

...ucture that is, because of the joining of its ends contrary to most of proteins, which have a beginning and an end." AS-48 is very stable with respect to pH and temperature and has a broad action spectrum against numerous bacteria, including pathogenic bacteria transmitted by food, "which makes it a suitable ...

3.2 billion-year-old surprise: Earth had strong magnetic field

... years ago as it is today. The findings, which are contrary to previous studies, suggest that even in its earliest stages the Earth was already well protected from the solar wind, which can strip away a planets atmosphere and bathe its surface in lethal radiation. The intensity of the ancient magnetic field w...

Test finds manufactured nanoparticles don't harm soil ecology

...ordinary soil showed no negative effects, which is contrary to concerns voiced by some that the microscopic particles could be harmful to organisms. Scientists added both dry and water-based forms of manufactured fullerenes - nanosized particles also known as buckyballs - to soil. The nanoparticles didn't c...

Cold is hot in evolution -- UBC researchers debunk belief species evolve faster in tropics

... British Columbia researchers have discovered that contrary to common belief, species do not evolve faster in warmer climates. UBC Zoology PhD candidate Jason Weir and his mentor Prof. Dolph Schluter, director of the UBC Biodiversity Research Centre, charted the genetic family tree of 618 mammal and bird sp...

Local interventions have little effect on metapopulation stability

...d populations in nature because it indicates that, contrary to theoretical predictions, localized perturbations are unlikely to affect the dynamics of real metapopulations. This study will be published on February 21, 2007 in PLoS ONE, the international, peer-reviewed, open-access, online publication from t...

Pitt professor contends biological underpinnings

...ular change. "The biology of the cell seems to run contrary to the model people have in their heads," says Schwartz, and he contends that if our molecules were constantly changing, it would threaten proper survival, and strange animals would be rapidly emerging all over the world. Consequentially, Schwartz ar...

Male sweat boosts women's hormone levels

...ical arousal and brain activation in women. Yet, contrary to perfume company advertisements, there is no hard evidence that humans respond to the smell of androstadienone or any other chemical in a subliminal or instinctual way similar to the way many mammals and even insects respond to pheromones, Wyart sa...

New sucker-footed bat discovered in Madagascar

... live in areas that have been completely degraded, contrary to what is indicated or inferred in the current literature." This underlines the importance of basic scientific research for establishing the priorities for conservation programs and assessments of presumed rare and possibly endangered animals, the s...

Complexity constrains evolution of human brain genes

...brain have in fact slowed down in their evolution, contrary to some earlier reports," says study author Chung-I Wu, professor of ecology and evolution at the University of Chicago. "The more complex the brain, it seems, the more difficult it becomes for brain genes to change. Calibrated against the genomic av...

Electrical activity alters language used by nerve cells

...l Academy of Sciences, the biologists showed that, contrary to the prevailing viewpoint, neurotransmitters--the chemical language of nerve cells--and receptors--the proteins that receive and respond to neurotransmitters--are not specified by a rigid genetic program. Altering nerve activity during development...

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(Date:10/14/2014)... millions of years since T. rex took ... University scientists is breathing life back into dinosaurs using ... The research has important implications for how dinosaurs used ... the sense of smell and cool their brains. ... doctoral student Jason Bourke, lead author of the new ...
(Date:10/14/2014)... a new kind of stem cell that can become either ... vessels, according to a study published today in the journal ... cell type contradicts current theory on how organs arise from ... origins of, and future treatment for, liver cancer., Thanks to ... complex being made up of more than 200 cell types. ...
(Date:10/14/2014)... led by researchers at the University of Massachusetts ... Miller School of Medicine (UMMSM) have identified what ... (manic depressive) disorder, a breakthrough that could lead ... as well as depression and other related mood ... week in Nature Molecular Psychiatry , show ...
Breaking Biology News(10 mins):Dinosaur breathing study shows that noses enhanced smelling and cooled brain 2Dinosaur breathing study shows that noses enhanced smelling and cooled brain 3Stem cell discovery challenges dogma on how fetus develops; holds insights for liver cancer and reg 2Stem cell discovery challenges dogma on how fetus develops; holds insights for liver cancer and reg 3Rare genetic disease protects against bipolar disorder 2Rare genetic disease protects against bipolar disorder 3
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