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Tag: "long" at biology news

Scientists discover global pattern of big fish diversity in open oceans

... is a key to maintaining our supply of fish in the long term and the ability of these living resources to ...al changes. Open Ocean Hotspots Coral reefs have long been known for their rich diversity of fish and invertebrates, but examining the diversity of highly...

The making and breaking of microtubules

...-- but it also put the brakes on the project for a long time. "The key was to get the tubulin assemblies locked at the correct states suitable for structural analysis, but even more challenging was finding an algorithm to reconstruct the double-layered GDP-tubulin tubes," says Wang. "Due to the double-l...

Amazon source of 5-year-old river breath

...w much carbon can be stored ?and where and for how long ?is critical, the authors say. "Our results were surprising because those who've previously made measurements found carbon in the rivers that came from the surrounding forests to be 40 to more than 1,000 years old," Aufdenkampe says. "They assumed t...

Mosaic mouse technique offers a powerful new tool to study diseases and genetics

...ng mosaic vertebrates, such as mice. The mouse has long been considered an ideal laboratory model for studying human development and disease, primarily because mouse DNA and human DNA are remarkably alike. The MADM technique, which Luo and his colleagues developed for mice, works on the same principal as...

Morphine for Chest Pain Increases Death Risk

...hile patients hospitalized for a heart attack have long been treated with morphine to relieve chest pain, an analysis by researchers from the Duke Clinical Research Institute has shown that these patients have almost a 50 percent higher risk of dying. The researchers call for a randomized clinical trial ...

Depression gene may weaken mood-regulating circuit

...ingulate circuit than those with two copies of the long variant. Next, using functional magnetic resonance imaging (fMRI), the researchers monitored the brain activity of 94 healthy participants while they were looking at scary faces, which activates fear circuitry. Those with the short variant showed le...

Chickadees can help humans get their bearings

...cating your car in the parking lot at the end of a long day in the office. This discovery points to the fact that our early experiences influence how we solve such problems and could mean that by varying the environments that we encounter early in life, we could broaden and hone our spatial navigation abi...

Where Bacteria Get Their Genes

... gene transfer, unique to the bacterial world, has long been recognized as common. But until now scientists did not know which of a bacterium's genes came from lateral gene transfer and which had been inherited from its parent. In their study, the scientists focused on the best-studied group of bacteria,...

Bioinformatics reveals new gene regulation system

... "It's a proof of principle that you can go a very long way by comparative genomics now." Their findings will be published in the July issue of Trends in Genetics, with early publication now online. Gelfand is presenting the work on June 24, 2005, at the annual meeting of HHMI international research schol...

Researchers grow stem cells from human skin

...ted in animals; now we need to test their function long term," said Soker. Soker said the cells have potential to be used both in tissue engineering ?the science of growing tissues and organs in the laboratory ?as well as in cell therapy. For cell therapy, laboratory-grown cells would be injected into th...

Researchers find first evidence of venom system in extinct mammal

...al Alberta has proved to be the key to answering a long unsolved evolutionary question, say researchers fr...this old. "This just shows you that no matter how long you've been working on something, you can still learn a lot just by uncovering one little piece of i...

Researchers discover mechanism for multiplying adult stem cells

...e gene is reactivated in adult tissue where it has long been dormant. Hochedlinger found that when he switched the gene on, the mice immediately formed tumors in the gut and in the skin where the gene was active. When he switched the gene off, the tumors subsided, demonstrating that the process is reversi...

Molecular steps involved in the creation of gene-silencing microRNAs identified

...eration of miRNAs from the genes that give rise to long primary RNA molecules through to the mature miRNAs that target messenger RNA. Significantly, the research also shows that the finished miRNAs are associated with a protein called Argonaute 2, known to be involved in inactivating messenger RNA. "In t...

Modified collagen could yield important medical applications

...les form a distinctive triple-helix in which three long protein strands intertwine like rope. Yu speculate...p a collagen-based bandage fight infections over a long period of time. Modified collagen could also release helpful medications while serving as a coating ...

Unusual antibiotics show promise against deadly 'superbugs'

...les form a distinctive triple-helix in which three long protein strands intertwine like rope. Yu speculate...p a collagen-based bandage fight infections over a long period of time. Modified collagen could also release helpful medications while serving as a coating ...

Motor transport in bio-nano systems

...the axons between our nerve cells, which can be as long as half a meter. All of these movements are based on two molecular components: very thin rod-like filaments, which form a complex network of rails, and molecular motors, which move along those filaments and carry vesicles and other nanocargo along. W...

Scientists discover the body's marijuana-like compounds are crucial for stress-induced pain relief

...ynthesizing the enzyme inhibitor. Scientists have long known that injured athletes or even gunshot victims have a period of time in which the body's pain reaction is delayed. This effect is called "stress-induced analgesia." By the mid-1990s, researchers had targeted the sites of action of the brain's na...

Researchers use 3-D imaging system to unveil swimming behavior of microscopic plankton

... keep their depth, a behavior which was postulated long ago but had never been measured in the ocean until now. The results were captured during three experiments lasting several weeks at two sites in the Red Sea's Gulf of Aqaba, near the coral reef of Eilat in Israel and at Ras Burka on the coast of Egy...

Caloric restriction won't dramatically extend life span in humans: UCLA research

...strict their caloric intake substantially and over long periods of time." Phelan developed the first mathematical model demonstrating the relationship between caloric intake and longevity, using representative data from controlled experiments with rodents, as well as published studies on humans, diet and...

Discovery of an American salamander where it shouldn't be: Korea

...ica. But this tops everything I've ever found by a long ways," Wake said. "For me, this is the most stunning discovery in the field of herpetology during my lifetime. It's so utterly unexpected, so completely unexpected." The discovery of a lungless salamander from the family Plethodontidae was made two ...

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