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Tag: "high" at biology news

PET/MRI scans may help unravel mechanisms of prenatal drug damage

...ult in a euphoric response," Benveniste said. The high uptake of radiolabeled cocaine in the placenta is also particularly relevant, the researchers said, because cocaine is known to constrict blood vessels in the placenta. It may be that this constriction of placental blood flow is one of the mechanisms...

BioMed Central welcomes the new National Institutes of Health public access policy

...ignificant benefit is in addition to the rapid and high quality peer review, fast publication and high visibility of BioMed Central's Open Access journals. BioMed Central urges all researchers in the li...

Probing the promise and perils of nanoparticles

...vering drugs to their targets inside the body, but high concentrations of these nanoparticles can be toxic...membranes, making the membranes more permeable. At high enough concentrations, they can completely destroy the membranes, killing cells in the process. But ...

Not-for-profit publishers call NIH public access rule a missed opportunity

...ssociation of Immunologists. "Our journals provide high quality peer-review, editing, and publication services for NIH-funded research." "These societies and the journals they publish have acted as responsible stewards of the scientific and biomedical literature for more than 100 years," Hogan said. "Wha...

Researchers devise way to mass-produce embryonic stem cells

...al cell culturing methods can't meet the projected high market demand for stem cells," Yang said. He and Anli Ouyang, a doctoral student in chemical engineering, grew mouse embryonic stem cells in a bioreactor. Cell growth increased 193-fold in 15 days. At the end of that period, cell density ?the number...

Chemists identify immune system mechanism for methamphetamine binges

...ed and administered at therapeutic levels that are high enough to clear the drug from the body, he says. "Methamphetamine has become the ‘crack' of the 21st century," Janda says. "We're just starting to unravel its mechanism of addiction." Further studies of the drug are planned, he adds. Methamphetamin...

HIV vaccine trial breaks ground for future research

...unteers were men who have sex with men or women at high risk for heterosexual transmission. The vaccine an... that more research is needed to be sure whether a high vaccine antibody response is related to a lower incidence of HIV infection. Citing the possible slig...

Fleshing out the genome

... if a protein was even expressed. Now that we have high confidence that many of these hypothetical genes are expressing proteins, we can look for what role these proteins play." Before this study, nearly 40 percent of the genetic sequences in Shewanella oneidensis--of key interest to DOE for its potentia...

Flocking together: Study shows how animal groups find their way

...ced groups like those of real animals, which pay a high price -- such as being eaten -- if they stray from their group. Second, a few animals were programmed to have a preferred direction, as if aware of a food source or other valued destination. These animals were instructed to balance their desire to m...

Robot-based system developed at Carnegie Mellon detects life in Chile's Atacama desert

...ting low levels of micro-organisms and visualizing high levels incorporated as biofilms or colonies," said...roblem, we designed our system to excite dyes with high intensity flashes of light. The camera only opens during those flashes, so we are able to capture a ...

Molecule that usually protects infection-fighting cells may cause plaque deposits inside arteries

...er risk factors such as smoking, obesity and diets high in fat and cholesterol. ...

Alaskan puzzles, monitoring provide insight about North Pacific salmon runs

...s School of Aquatic and Fishery Sciences. Another high research priority is exploring harvest strategies ...alue of a license to fish there has dropped from a high of $250,000 to perhaps $20,000. "Rather than maximizing the number of fish harvested, if you maximi...

Nanoscale Diagnostic Sets Sights on Alzheimer's

...g centers. "This will be a biosensing system with high sensitivity and specificity that can help health professionals diagnose many debilitating diseases. This is particularly important for diseases like Alzheimer's where a reliable diagnostic tool is lacking and early intervention could have a significa...

Insight into natural cholesterol control suggests novel cholesterol-lowering therapy

...Scientists have long known that cells respond to a high cholesterol diet by shutting down its internal synthesis, he explained. However, the molecular mechanisms by which cholesterol and other related compounds exert that self-control have only more recently begun to emerge. The researchers now demonstra...

Biodiversity hotspots identify conservation priorities

...uding that hotspots also hold a disproportionately high degree of unique evolutionary history. Madagascar ...ver a small total land area yet account for a very high percentage of global biodiversity. The concept was subsequently refined by Myers and CI, most recent...

No relief for Pacific Northwest drought

...igher risk," he said. "When our models show a very high level of fire, as they do now, they are usually pretty accurate." Graphic images mapping the U.S. drought and fire risk conditions are available to illustrate this story, at the web site of OSU News and Communication Services, at http://oregonstate....

Transgenic plants remove more selenium from polluted soil than wild plants, new tests show

...r both humans and animals, but it becomes toxic at high doses. The dangers of selenium toxicity came to light in the 1980s when biologists discovered that irrigation drain water held at the Kesterson Reservoir in the San Joaquin Valley was causing serious deformities in birds. The researchers say cleanin...

Increased risk of osteoporosis associated with gene that one in five people have

...an usual, leading to low serum estrogen levels and high levels of estrogen metabolites," Villareal says. "...dvantageous to identify those people at especially high risk for osteoporosis of the hip. The CYP1A1 variant that the researchers linked to osteoporosis may...

New Drugs For Bad Bugs: UF Approach Could Bolster Antibiotic Arsenal

... aimed at patients with chronic conditions such as high cholesterol or diabetes, not in drugs designed to be used for a week or two and then stopped once an infection clears, he said. Now UF researchers have devised a patent-pending method that combines testing of various drug concentrations at the site ...

Glow-in-the-dark zebrafish at UH hold keys to biological clocks

... zebrafish (danio rerio) because they yield such a high output of spawn, with hundreds of eggs being laid by each female per week. This gives the scientists a better chance of identifying mutant fish whose biological clocks run fast or slow, providing the ability to trace the specific genes that create th...

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