Tag: "paradox" at biology news

Despite darkness, nocturnal bees learn visual landmarks while foraging at night

...a's nocturnal homing abilities. A solution to this paradox may lie outside the eye. The researchers found that specialized visual cells in the bee's brain had morphologies suited to summing light signals and intensifying the received image....

Study finds anti-HIV protein evolved millions of years before the emergence of AIDS

...l's "Through the Looking Glass" that refers to the paradox of running as fast as you can just to stay in place. When comparing human Apobec3G genes with those of man's distantly related primate relatives, Malik and colleagues found, to their surprise, that the protein began to evolve in response to such Darw...

Good bacteria trigger proteins to protect the gut

...immune system to attack. "It's always been a major paradox that our immune system evolved to recognize pathogenic microorganisms and to react to them with a powerful, destructive response; but at the same time, it tolerates a very close, continuous contact with myriad commensal bacterial species that share m...

Energy conservation targets hit by notions of 'comfort'

...searchers were especially concerned to address the paradox that: "likely responses to global warming, such as greater reliance on air-conditioning, threaten to increase energy demand and CO2 emissions and exacerbate rather than mitigate the effects of climate change". During the one-year project, the researc...

Rb protein's role in retina development is key to understanding devastating eye cancer

...sease," Dyer said. "The first step to solving that paradox and understanding why mice without the Rb protein don't get retinoblastoma is figuring out what that protein does during normal mouse development. Our study was that first step. What we're learning could eventually help us to block the molecular sign...

Purdue scientists: Genetically modified fish could damage ecology

...t Rick Howard and his colleagues have discovered a paradox that crops up when new genes are deliberately inserted into a fish's chromosomes to make the animal grow larger. While the genetically modified fish will be bigger and have more success at attracting mates, they may also produce offspring that are le...

MBL scientists confirm evolutionary exception

...e many hypotheses have addressed this problem, the paradox raises one of the most perplexing questions in biology: If asexual reproduction is more efficient than sexual reproduction, why does sexual reproduction predominate so thoroughly? New research from MBL evolutionary biologists may help scientists come...

Rodents bred for alcohol preference live longer than rats bred for alcohol avoidance

...ith genes suppressing drinking be related to this paradox in humans? These are extremely important questions that merit further investigation."...

Dartmouth study advances prion disease research

Hanover, NH Adding to the paradox of prion diseases, Dartmouth Medical School researchers have discovered that RNA plays a role in converting a normal prion protein into a mutant that leads to mad cow disease and other fatal brain illnesses. Their study, reported in the Oct. 16 iss...

Paradox in the lungs resolved

...r 3 issue of the journal Cell, resolve an apparent paradox that prevented researchers from understanding how ...paper, Dr. Henson and his colleagues resolved this paradox with experiments showing that the lung collectins actually play two roles in the lungs, damping the ...

Smaller food portions may explain the 'French paradox' of rich foods and a svelte population

...rtions on both sides of the Atlantic. "The French paradox is only a paradox if one assumes that dietary fat is the major cause of obesity and cardiovascular disease," said Paul...

JCI Table of Contents, 15 August 2003

... phospholipase C underlies the airway beta-agonist paradox AUTHOR CONTACT: Stephen B. Liggett University Of Cincinnati, Cincinnati, Ohio, USA. Phone: (513) 558-4831 Fax 1: (513) 558-0835 E-mail: stephen.liggett@uc.edu View the PDF of this article at: https://www.the-jci.org/press/18193.pdf ACCOMPANYI...

Physics tip sheet #36 - July 30, 2003

...solves for the first time this so-called submarine paradox by using a general relativistic extension of the Archimedes law of moving bodies to show that the submarine will sink. Journal article: http://link.aps.org/abstract/PRD/v68/e027701 Physical Review Focus: http://focus.aps.org/story/v12/st4 6) H2...

Copper chelation is a promising new therapy for clogged arteries

... colleagues appear to have solved a long-lingering paradox in the field of growth factor biology," commented Dr. Elazer R. Edelman, Director of Harvard-MIT Biomedical Engineering Center in Cambridge, Massachusetts. "Their imaginative work may provide novel treatment modalities for a range of critical disea...

Math discovery may aid resource management

...earchers were struggling to resolve a mathematical paradox first suggested in 1973 by a famous ecologist name...is. For 30 years researchers have debated this paradox between the way the world appeared to work a tangled web of thriving organisms, as Charles Darwin d...

New hints into development of osteoporosis

...ce abnormally high numbers of osteoclasts. "This paradox suggests that something in the living animal interacts with beta3 during the process of osteoclast differentiation," Teitelbaum explains. His team discovered the interaction may involve M-CSF. When they took precursor cells from mice lacking beta3 an...

Little yellow molecule comes up big

...o go." The findings also settle a long-standing paradox -- why bilirubin is made at all. If the degradation of hemoglobin stopped one step earlier, with a greenish, soluble molecule called biliverdin, the waste could be easily excreted without the threat of damaging build-up, notes Snyder. But instead of ...

Science picksleads, feeds and story seeds (November 2002)

...v ) 703-648-4460. FEEDS Natural Surrealism? --A paradox of terms perhaps, but perhaps the best way to describe the astonishing patterns, vivid abstractions, and fantastic shapes exhibited in the collection of satellite imagery being displayed as "Landsat: Earth as Art." The joint USGS and NASA collection ...

First discovery of an immune system counter attack in the virus wars

... that causes Kaposis sarcoma. It had long seemed a paradox to researchers, Lanier says, that inhibitory and activating receptors could be so similar. With receptors involved in absolutely opposite functions -- activating the immune defenses versus keeping the army shut down the organism runs the risk of tri...

Paradox of groundwater age has implications for hydrology

... effects exactly cancel, Bethke said. This is the paradox of groundwater age, and it has broad implications in groundwater hydrology. Like carbon-14 dating of artifacts, scientists can use radioactive isotopes to age-date groundwater. If a sample proves to be very old, we might conclude that it has been mi...

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