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Tag: "models" at biology news

Iron critical to ocean productivity, carbon uptake

...g to Behrenfeld. The researchers are creating new models of carbon cycling using NASA satellite imagery whi...growth, but it wasn't as robust or as sustained as models predicted. "It wasn't the silver bullet that scientists originally hypothesized," Strutton said. "T...

UGA study explains peaks and troughs of dengue epidemics

...researchers a framework that can be used to create models that predict dengue outbreaks in both space and ti...s compared the data with results from mathematical models that explore ?both independently and collectively ?the role factors such as temporary cross-immunity...

NASA study solves ocean plant mystery

...h of phytoplankton allow scientists using computer models to re-create the movement of carbon around the world much more accurately. Resource managers will become more knowledgeable about where carbon is going and the impact of recreational, industrial or commercial processes that use or produce carbon. Res...

Traditional Chinese medicine for diabetes has scientific backing

...cientist Dr Jiming Ye says: "Our studies in animal models of diabetes show that berberine acts in part by activating an enzyme in the muscle and liver that is involved in improving sensitivity of the tissue to insulin ?this in turn helps lower blood sugar levels. In addition, it seems berberine can help red...

Avian flu modeled on supercomputer, explores vaccine and isolation options for thwarting a pandemic

... HOW IT ALL COMPUTES The computer simulation models a synthetic population that matches U.S. census de...olving more throws of the virtual dice. "Computer models serve as virtual laboratories where researchers can study how infectious diseases might spread and w...

Study fishes out new role for prostaglandins

...zle. This (finding) may be one piece." Zebrafish models may seem like a step back from the more traditional mouse models used to study cancer. But zebrafish, which develop quickly, are inexpensive and easy to manipulate, ...

Man-made heart tissue improves cardiac performance

...searchers were successful in this task. Their live models showed significant improvement in heart function, particularly in the amount of vascularization throughout the implanted sections. Further, the tissue engineered construct remained viable even after the three-week implantation period, maintaining ca...

Enzyme crystal structure reveals 'unexpected' genome repair functions

...says. Prior to this study, there were no specific models for how XPB acts in DNA separation either to initi... transcription or to begin NER. There were also no models for the role that XPB, which is an essential subunit of Transcription Factor IIH (TFIIH) functional ...

Stem cell transplants improve recovery in animal models for stroke, cerebral palsy

...earchers are pursuing transplants in larger animal models and studying how MultiStem TM cells work in living human brain tissue housed at the MCG Human Brain Bank, directed by Dr. Sergei Kirov. "Number one is safety," said Dr. Borlongan. "We are moving more aggressively into carrying this into the clini...

Brittlestar provides new model for stem cell research

... more closely related to vertebrates than previous models with extensive regeneration capabilities such as Hydra. ...

Data published in PNAS show antibodies can be made 10 times more toxic to cancer cells

... orders of magnitude. Studies conducted in in vivo models demonstrated that these antibodies were greater than ten times more toxic to target cells. The enhanced antibodies also were able to kill tumor cells that are typically "invisible" to other antibodies because they express low levels of target antige...

Chemical signaling helps regulate sensory map formation in the brain

...er, in 1983, Alfred Gierer developed computational models of this process. His models indicated that at least two counterbalancing signaling systems were required to push and pull the gr...

Efficiency, not more doctors, is the prescription for aging population

... United States since early in the 20th century, as models of both clinical excellence and efficiency. One s...000 in the 6 months before death. "Both of these models can't be 'the best'" way to provide medical care to the chronically ill," Goodman said. "We believe ...

A Jekyll and Hyde of cytokines: IL-25 both promotes and limits inflammatory diseases

... inflammatory response similar to that observed in models of inflammatory bowel disease. These results also support the notion that the immune response that causes allergies and asthma is an evolutionary hangover resulting from mankind's historical fight with parasitic worm infections. That is, a type 2 ...

Resveratrol prolongs lifespan and delays onset of aging-related traits in a short-lived vertebrate

...lifespan of the available animal models--mammalian models for aging are relatively long-lived and aren't as easily studied as shorter-lived species. Resveratrol is an organic compound naturally present in grapes--and particularly enriched in red wine--and was previously shown to prolong lifespan in non-ve...

Bone and cartilage growth to blame for heart valve disease

...ms of aortic and mitral valve disease using animal models and human studies. "I wanted to know why diseased valves had were hardened with a glassy whitish appearance ?totally different than healthy tissue, which indicated to me that the actual structure of the valves had changed," she says. Dr. Rajamannan ...

Scientists develop malaria forecasting tool to predict disease risk

...stem using seven, state-of-the-art, global climate models which produce weather forecasts up to six months in advance. The system allows researchers to assess the probable effect of weather conditions on a malaria epidemic. The team's research is published in the latest issue of Nature. ...

Therapeutic prospects beyond Vioxx

...me seemed as effective as treatment with NSAIDs in models of pain and inflammation. This has prompted several large pharmaceutical companies to develop drugs targeting this enzyme. Such inhibitors will soon enter human trials. FitzGerald and his colleagues showed that deletion of mPGES-1, in contrast to de...

New test to detect rare proteins in blood

...me after relapse. The Greene lab developed mouse models that carry cancer cells overexpressing Her2/neu. W...mors with targeted monoclonal antibodies in animal models led to far more significant prevention of tumor growth as well as tumor emergence and reoccurrence. ...

Parts of the Caribbean and Central America are likely to have less summer rain

...NAS online edition.) The majority of the computer models calls for a substantial decrease in tropical rainf...thor of the study. By the end of this century, the models call for a decrease in summer rainfall of 20 percent or more in parts of the Caribbean and Central A...

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