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Tag: "proposed" at biology news

Plants, too, have ways to manage freeloaders

...echanisms could prevent this?" She and colleagues proposed several years ago that in cooperative relationships, one member must have the upper hand in enforcing good behavior. This could involve shutting down resources to nodules inhabited by poorly performing bacteria, or preventing the aging of nodules mor...

Making medicine 'smarter'

... to do it better and faster. "The outcome of the proposed research is expected to have substantial implications in health care by contributing to the improved diagnosis of indeterminate breast lesions by non-invasive imaging," Meyer-Baese said. "We will deliver a flexible and reusable software system in MR ...

Asleep in the deep: Model helps assess ocean-injection strategy for combating greenhouse effect

...teract the greenhouse effect, some scientists have proposed capturing the culprit---carbon dioxide---as it is emitted from power plants, then liquefying the gas and injecting it into the ocean. But there are pitfalls in that plan. The carbon dioxide can rise toward the surface, turn into gas bubbles and ven...

New evidence supports century-old theory of cancer spread

...he early 1900's the German pathologist Otto Aichel proposed that metastasis is caused by cancer cells fusing with macrophages. "There is now evidence to support all aspects of his proposition," said Pawelek. "Macrophages are among the most motile cells we have. By co-opting the macrophage's ability to move, t...

Bats use touch receptors on wings to fly, catch prey, study finds

...nting. The theory that bats fly by feel was first proposed in the 1780s by French biologist Georges Cuvier, but faded in the 1930s when researchers discovered echolocation, a kind of biological sonar found in bats, dolphins and a few other animals. Bats use echolocation to identify and navigate their environ...

UK sperm donor crisis

...or men recruited since April 2005. He said: "The proposed changes in the Human Fertilisation and Embryology Authority (HFEA) review (SEED report)[2] and the EU directive on standards relating to the handling and use of human tissues and cells may also lead to further reductions in donor treatment activity. ...

Scientists narrow the time limits for the human and chimpanzee split

A team of researchers has proposed new limits on the time when the most recent common ancestor of humans and their closest ape relatives -- the chimpanzees -- lived. Scientists at Arizona State and Penn State Universities have placed the time of this split between 5 and 7 million yea...

How Fruitflies Know It's Time for Lunch

...n to sample new food sources. The researchers also proposed that hug proteins play a role in hormone-triggered growth, an important consequence of adequate feeding. To begin their investigation, Melcher and Pankratz analyzed the DNA from flies with abnormal eating behavior. One group of these flies shared a ...

Viagra's hidden help for wildlife

... of Western medicine in Asian markets. "When we proposed that Viagra might make inroads into TCM treatments for impotence, conservationists told us we were nave and that TCM consumers were unwilling to use a product outside their own medical tradition," says Bill von Hippel. "For example, there is still st...

Polymer gel can block toxic leakage problem in gene therapy

...sue of the journal Cancer Research the researchers proposed a solution to the viral escape problem in the form of a polymer compound already employed for wound healing and for drug and gene delivery. After being mixed with a gene-bearing virus, this compound -- called poloxamer 407 -- undergoes a temporary p...

'Acid rain' and forest mass: Another perspective

...nts and the drop in the efficiency of their use is proposed as an explanation of this disorder. Thanks to this investigation, it was concluded that the atmospheric deposition of contaminants produces damage in the forest masses of Bizkaia and may be aggravated in the future. ...

Cyberkinetics, Case to develop system to help restore extremity function

...terface technology developed at Cyberkinetics. The proposed neuroprosthetic system would offer human users an advanced system incorporating Cyberkinetics' BrainGate TM Neural Interface System (BrainGate System) to sense intended movement and generate command signals. The command signals would drive a hybrid ...

War on terror meets war on cancer

... of explosives favored by terrorists, and has been proposed as a way to use hair samples from terrorists to determine their past movements, based on isotope ratios in food and water at different locations. How the New Study Was Performed Prevailing wisdom says that water inside and outside of cells is ide...

Researchers offer proof-of-concept for Altered Nuclear Transfer

...not only works but is extremely efficient." First proposed by William Hurlbut, Stanford University professor and member of the President's Council on Bioethics, ANT has been described as an ethical alternative to somatic cell nuclear transfer (SCNT), also known as therapeutic cloning. For SCNT, a donor nuc...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...ientist who - supported by an international team - proposed both GOME and SCIAMACHY to national space agencies and ESA in the first place. He explained that the two instruments were originally chosen to fly because of their ability to measure stratospheric ozone, but were also selected in order to investigate...

Plants reveal a secret and bring researchers nearer a cleaner future

...lytic reaction. Five intermediate states have been proposed in the process of photosynthesis - a cycle known as "Kok cycle"- but only four had been proved until recently. With the help of the ESRF, scientists have been able to identify the missing state, which is particularly important because it is directly ...

What Makes The Brain Tick, Tick, Tick: Researchers Gaining New Insights Into Brain's Internal Clock

... his colleagues at Brown and Columbia Universities proposed what became the traditional theory for explaining interval timing which involved a "pacemaker-accumulator" model. This model holds that somewhere in the brain lurks an independent biological pacemaker that regularly emits neural timing pulses or "tic...

Scientists get first glimpse at how plants, most animals repair UV-damaged DNA

...y how the enzyme worked. By the 1980s, scientists proposed a mechanism for photolyase ?that it donated an electron to damaged DNA ?but nobody could prove it. The reaction happened too fast to be seen with normal laboratory tools. Scientists also knew that the enzyme formed a tiny water-filled pocket to host...

Immune system has evolved to prevent autoimmune disease

...d to autoimmune diseases, a scenario that has been proposed as a cause of some rheumatic diseases like arthritis. "There are as many as a 100 million unique antibodies circulating through our bodies at any given time, but just three or four of these might be effective against any particular disease," said Mi...

Brain networks change according to cognitive task

... in the brain -- have been debated since they were proposed in the late 20th century," said Bitan. "Now, with new techniques to analyze brain imaging data, we can examine the specific role played by different brain regions in the network that are required for any cognitive task. These techniques examining eff...

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