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Tag: "difference" at biology news

New species declared: Clouded leopard on Borneo and Sumatra

... the U.S. National Cancer Institute shows that the difference between the two clouded leopard species is comparable to the differences between other large cat species like lions, tigers, and jaguars. Scientists believe the new species of clouded leopard diverged from the mainland population some 1.4 million ye...

Twin studies reveal genetic components leading to cardiac and kidney disease

...ple who are the same age. A formula measuring the difference in the frequency of traits between the siblings in each MZ and DZ twin pair establishes what is called the index of heritability. The human genome has three billion base pairs and about 30,000 genes. O’Connor and his research team have looked at ...

No-scalpel vasectomies by skilled surgeons may speed recovery

...mies in the trial. The smaller study showed no difference in postoperative results between the two techniques, but this, review authors say, could have been due to the small numbers of participants. Another important factor was the lack of experience that participating doctors had in the no-scalpel techniqu...

Mosquito repellents that emit high-pitched sounds don't prevent bites

... work. "All ten studies found that there was no difference in the number of mosquitoes found on the bare body parts of the human participants with or without an EMR," says lead author Dr Ahmadali Enayati, who works at the Mazandaran University of Medical Sciences in Iran. Although the researchers found no...

Rewarding fat rats

...atural world, making the right choice can mean the difference between life and death. When rats and other animals choose the thing that leads to a "reward," such as food, changes happen in the body and the brain. Describing and understanding those changes has been the focus of Natural Sciences and Engineering...

UF scientists discover new genus of frogmouth bird in Solomon Islands

...rogs. For perspective on the scale of evolutionary difference between genera, consider that modern humans and Neanderthals are different species within the same genus (Homo), while chimpanzees are our living relatives from a closely related genus (Pan), but that we share the same taxonomic family (Hominidae) wi...

Jefferson researchers' discovery may change thinking on how viruses invade the brain

... transcription were affected. But we didn’t find a difference in the initial viral entry in the central nervous system. We actually saw that the virus replicated better with the binding site than without it. LC8 is a transcription factor that helps the virus efficiently replicate in cells." The researchers w...

Gene study shows three distinct groups of chimpanzees

...with uncertain heritage. "Finding such a marked difference between the three groups has important implication...hree groups. The extent of accumulated genetic difference enabled the researchers to speculate about when the different populations separated. They estimate t...

New bird, bat species revealed by extensive DNA barcode studies

...w species begins its evolution. "Of course, the difference with cancer is that it destroys itself when it kills you off, whereas many new species stabilize," von Borstel says. "Obviously, no metaphor is the be-all of reality. But I’m hoping this symposium I am hosting will help people look at cancer in a new...

Cancer that colonizes our bodies

...w species begins its evolution. "Of course, the difference with cancer is that it destroys itself when it kills you off, whereas many new species stabilize," von Borstel says. "Obviously, no metaphor is the be-all of reality. But I’m hoping this symposium I am hosting will help people look at cancer in a new...

Biologists produce global map of plant biodiversity

...understanding among ecologists about this striking difference continues to be very limited. "Given that we are far off from knowing the individual distributions of the world's 300,000 odd plant species," says Jetz. "Holger Kreft and I investigated how well the richness of plants can be predicted from environ...

Biodiesel won't drive down global warming

... promote the uptake of biodiesel will not make any difference to global warming, and could potentially result in greater emissions of greenhouse gases than from conventional petroleum derived diesel. This is the conclusion of a new study reported today in Chemistry & Industry, the magazine of the SCI. Ana...

New test for most virulent HPV strains under study

...e risk of 1-2 percent. “Clearly, there is a big difference between HPV types 16 and 18 and all the other cancer-causing strains of HPV,?says Dr. Ferris. The type-specific assay, developed by Third Wave Technologies, Inc., in Madison, Wis., is being tested along with an assay that looks for the presence o...

Bird sex is something else

...they have an unusual take on his and hers ?and the difference is genetic. Species with differentiated sex chromosomes (X and Y in humans, for example) get around the fact that males and females get different-sized portions of sex chromosome genes with a balancing act geneticists call dosage compensation. But r...

Deep in the ocean, a clam that acts like a plant

...mpletely sequenced and published in Science. "The difference here is that while plants get their energy and carbon via photosynthesis by chloroplast symbionts, this clam gets its energy via chemosynthesis," said Jonathan Eisen, a professor at the UC Davis Genome Center and an author on the paper. The actual...

Ultrasound upgrade produces images that work like 3-D movies

...om slightly different angles, mimicking the normal difference between left and right eye views. Special glasses or goggles can then be used to fuse the two images into one, gaining a 3-D effect. This principle lies behind 3-D movies and the familiar Fisher Price View-Master toy. With practice, some people ca...

Microfossils unravel climate history of tropical Africa

...an during the last ice-age. This large temperature difference between land and ocean surface resulted in drier c... about 2.5°C colder. By comparing this temperature difference with existing records of continental rainfall variability, lead author Johan Weijers and his colleag...

MicroRNA helps prevent tumors

...let-7 microRNA, we were afraid we wouldn't see any difference when we changed only one of these target genes," s... who is also an MIT biology professor. "Seeing the difference encourages us to explore the biological importance of other examples of microRNA regulation."...

Study finds mercury prevalent in many western fish

...heric source. There also tended to be a noticeable difference between 'piscivores,' or fish-eating fish, and non...em met or exceeded the 0.3 microgram level. "The difference in mercury levels between salmonids and piscivores is likely a function of their diet," Hughes said....

Smokers quit after damage to brain region

... Dornsife Chair in Neuroscience, also stressed the difference between habitual and instinctive behaviors. "Because the insula is now recognized as a key structure in processes of emotion and feeling, the fact that insular damage breaks down a learned habit such as smoking, demonstrates a powerful link between...

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