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Mosquitoes are more attracted to individuals infected with malaria

...forms of the disease or to uninfected people. The question of whether malaria increases your chances of being bitten by a mosquito has long stalled scientists because of numerous confounding factors. Sweat, breath odour, and high body temperature all increase mosquitoes¡¦ blood lust, and no previous study ha...

Birds and bats sow tropical seeds

...st how big a role these winged gardeners play is a question ecologists from the University of Illinois at Chicago and several Latin American universities are about to find out by setting up essentially a living laboratory in Mexico's gulf coast state of Veracruz. Henry Howe, a noted authority in restoration ...

Plants discriminate between self and non self

...s to fight if they belong to the same plant." The question was, do plants recognize their own roots and avoid competing with them and how do they do this? Working with common garden peas, Falik worked with Dr. Ariel Novoplansky at Ben Gurion University of the Negev, Israel. The researchers used plants that h...

Prozac for future Plants on Mars

...s to fight if they belong to the same plant." The question was, do plants recognize their own roots and avoid competing with them and how do they do this? Working with common garden peas, Falik worked with Dr. Ariel Novoplansky at Ben Gurion University of the Negev, Israel. The researchers used plants that h...

Immune system has evolved to prevent autoimmune disease

...sease."This should help us get well faster, so the question becomes, 'Why didn't we evolve that kind of adaptive response?'" Deem said. Deem's analysis falls within a branch of physics called statistical mechanics, which uses a system's physical behavior at the molecular or atomic scale to build up a picture...

New study finds how cells with damaged DNA alert the immune system

...ine issue of Nature, shed light on a long-standing question of how the natural killer (NK) cells - which are a... which the genes have gone awry. "Many scientists question the importance of the immune system in stemming the development of cancer," said David H. Raulet, pr...

Renewed hope for Parkinson's patients

...ine issue of Nature, shed light on a long-standing question of how the natural killer (NK) cells - which are a... which the genes have gone awry. "Many scientists question the importance of the immune system in stemming the development of cancer," said David H. Raulet, pr...

Researchers find ways to turn manure into power

...a lot of interest in biomass," Sweeten said. "The question becomes, how do you convert biomass into energy?" he said. The solid feedlot waste presents a different challenge than the liquid waste from hog or dairy operations, Sweeten said. Researchers are trying to determine what process and what mix of the ...

U-M scientists discover identifying markers for primitive blood-forming stem cells

...stem cells? Perhaps the most important unanswered question for future applications in medicine is whether these same markers are expressed on human hematopoietic stem cells. Kiel and Yilmaz confirmed the existence of SLAM markers on HSCs in several strains of laboratory mice, but whether they will be found o...

Researchers discover key to human embryonic stem-cell potential

What exactly makes a stem cell a stem cell? The question may seem simplistic, but while we know a great deal of what stem cells can do, we don't yet understand the molecular processes that afford them such unique attributes. Now, researchers at Whitehead Institute for Biomedical Research working with hum...

Human brain is still evolving

...t in the human genome," he said. "The next logical question was to ask whether the same process is still going... the first record of written language. So, a major question is whether the coincidence between the genetic evolution that we see and the cultural evolution of h...

Picky female frogs drive evolution of new species in less than 8,000 years

... to generate a distinct species. "The overarching question is: Why are there so many species in the tropics?" Moritz said. "This work has led me to think that the reason is complex topography with lots of valleys and steep slopes, where you have species meeting in lots of little pockets, so that you get all ...

Hepatitis C complicated by morphine withdrawal

... by the same group, provides an explanation to the question of why so many HCV-infected patients fail to respond to IFN-alpha treatment. Although the clinical relevance of this study remains to be determined, these data showing that withdrawal promotes HCV expression by suppressing anti-HCV factor (IFN-alp...

Female butterflies go for sparkle -- not size -- when choosing to mate

..., using artificial selection," said Monteiro. "The question then becomes, 'Why do these populations remain unchanged?' What are the selective forces that maintain these patterns constant through time in any one species in nature?" In this butterfly species, females make the ultimate decision about whether to...

'License to kill' enables powerful immune attack cells in mice

...the August 4 issue of Nature. The immune cells in question already evoked cinematic connections simply by virtue of one of their names: scientists commonly refer to them as natural killer cells. The cells rapidly attack invaders and are continually generated in the bone marrow, leading to replacement of the ...

Grasshopper love songs give insight into sensory tuning

...to be exquisitely tuned to relevant input. A major question in neurobiology is how neurons tune the strength of their interconnections to optimally respond to such inputs. Neuronal circuitry consists of a web of neurons, each triggering others by launching bursts of neurotransmitters at targets on receiving ...

UF study first to quantify validity of DNA I.D. tool using marine snails

...y collecting them for centuries, Meyer said. "The question is what happens as you move away from cowries or birds into nematodes or sea spiders and other creatures that people don't know much about," he said. "That's where the problem in identifying different species is greatest, where the bulk of the divers...

Human cerebellum and cortex age in very different ways

..., Germany, is one of many conducted to date on the question of how gene expression changes across the human lifespan, but the first to examine how the two major brain areas age differently. Scientists had also not previously compared the effects of aging on the brains of humans and other primates. "The fact ...

Sudden change in social status triggers genetic response in male fish, study finds

... other fish. "Once they start changing, there's no question they'll become dominant within 2 to 10 minutes," B... be aware that he can change. This raises a bigger question about sophisticated social awareness in fish. After all, socialization requires more brainpower, and...

Normal chromosome ends elicit a limited DNA damage response

...his finding solves for the first time an important question that has long puzzled scientists. The natural ends of chromosomes look just like broken strands of DNA that a cell's repair machinery is designed to fix. But mending chromosome ends, or telomeres, would set the stage for the development of cancer in...

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