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Tag: "persistence" at biology news

Anti-bacterial additive widespread in U.S. waterways

...ironmentalcharacteristics, which include long term persistence and potentialbioaccumulation. Triclocarban, for example, has an estimated half lifeof 1.5 years in aquatic sediments. Do the potential benefits ofantimicrobial products outweigh their known environmental and humanhealth risks? This is a scientificall...

Scientists discuss improved biopesticides for locust control in West Africa

... affect non-target organisms," Vaughan said. "The persistence of base biopesticides is low in the environment be...ating technologies to improve on the environmental persistence of the biopesticide, specifically a lignin coating for the spores, which increases their resistance ...

Edible bivalves as a source of human pathogens: signals between vibrios and the bivalve host.

...environmental factors are well known to affect the persistence of vibrios in these organisms, the key role of the interactions between vibrios and the immune system of bivalves has been recently highlighted by scientists from the Universities of Genova and Urbino (Italy) in Environmental Microbiology. Carla Pru...

Achilles heel of the herpes virus possibly found

...rpes virus. For these studies, Fuller credits the persistence of research team members in working with the genomic library and culture of human and pig cells, especially U-M doctorate graduate Aleida Perez and postdoctoral fellows Qingxue Li and Pilar Perez-Romero. Perez-Romero is first author of one of the two...

Scientists track stealth DNA elements in primate evolution

... themselves capable of substantial propagation and persistence over time. However, prior evidence from the Ya5 subfamily indicated that at least some "master" Alu elements may persist in low-copy numbers for long periods of evolutionary time without retrotranspositional activity, suggesting that the mechanisms o...

Doctors should stop prescribing antibiotics for the common cold, review advises

...ibiotics did no better in terms of lack of cure or persistence of symptoms than those on placebo," Arroll says. The goal of the study, according to the authors, was to determine if antibiotics reduce general cold symptoms such as sneezing, inflammation of the nose and throat; if antibiotics have any effect on p...

Use of high hydrostatic pressure to inactivate Hepatitis A virus in oysters studied

...ies have demonstrated remarkable concentration and persistence of HAV in shellfish exposed to the virus through their surrounding seawater. Even with depuration, HAV may persist in oysters for several weeks after exposure. The virus also is fairly resistant to heating and may remain viable in shellfish after up ...

Opiate cocktail may spare cells from morphine's dark side

...ation. It is thought that the activated receptor's persistence at the cell surface leads to a compensatory overac...sence in combination with morphine may prevent the persistence of activated MOP receptors at the cell surface, the authors developed a drug cocktail containing mor...

Researchers find Amchitka seafood safe for now

... beginning to end: "I continue to be in awe of the persistence and skill of the CRESP people. We sent them with every protection we could reasonably devise, but the fact that the expedition was executed safely and successfully in this forbidding environment is quite extraordinary. And then we found that the chal...

Chernobyl: The true scale of the accident

...ation needs to be provided to the public about the persistence of radioactive contamination in certain food products and about food preparation methods that reduce radionuclide intake. Restrictions on harvesting of some wild food products are still needed in some areas. Also in the realm of protecting the envir...

Removing egg from nest may help save endangered whooping crane

...parks, but says priority should be given to ensure persistence of threatened and endangered species so that diversity is not lost permanently. "Surely we cannot appreciate benefits to ecological-process management if components of the ecosystem are missing," said Boyce. ...

Fitting in: Newly evolved genes adopt a variety of strategies to remain in the gene pool

... remained unclear. To determine the basis for the persistence of functional gene duplicates in the genome, three... "We show that, at least for yeast metabolism, the persistence of the duplicated fraction of the genome can be better explained with an array of different, often o...

The reason why antiviral therapy can't annihilate HIV infection, and what to do about it

... infected, resting CD4+ T cells contributes to the persistence of HIV and initiation of new infection cycles, co-administration of an effective and safe reagent that is capable of dampening cellular activation could minimize the spread of virions to uninfected bystander cells. ...

MRSA use amoeba to spread, new research shows

...in hospitals, they are likely to contribute to the persistence of MRSA in the hospital environment". "Adding to the concern is that amoebal cysts have been shown to trap pathogens and could potentially be dispersed widely by air currents, especially when they are dry. "Replication of MRSA in amoeba and other p...

New study explores beetle species with two forms of females

...ican Naturalist attempts to explain the mysterious persistence of two forms of females in many diving beetle populations. Their findings have important implications for theories of sexual conflict, which arises when the costs and benefits of multiple matings differ for males and females. "The male versus fema...

Botox could help target resistant tumors for treatment

... advantage of selectivity, absence of toxicity and persistence for a longer time than other agents that act on tumor vasculature. Further research may help us determine whether this approach would be useful to treating cancer in humans." The Gallez study was conducted by Réginald Ansiaux, Christine Baudelet, Gr...

Five surprising facts about starvation that could change the international agenda

...t in themselves sufficient factors to overcome the persistence of wasting in marginalized vulnerable groups." Was...creation at a national level does not preclude the persistence of wasting on a large scale." For example, the United Arab Emirates, a wealthy country, has a wastin...

HIV-1's high virulence might be an accident of evolution

...lentiviruses that likely evolved to maintain viral persistence in the context of an intact host immune system," t...eared that Nef was a 'bad guy' because it enhanced persistence and replication of the virus." The new findings suggest the gene's role may be less black and whit...

Beaver dams create healthy downstream ecosystems

...intain environments suitable for the formation and persistence of wetlands." The study comes as the beaver population in Rocky Mountain National Park is dwindling. Approximately 30 of the animals currently live there, down from a high of nearly 600 estimated in 1940. The authors caution that additional reductio...

Vaccine combined with short-term postexposure antibiotics protects monkeys from inhalational anthrax

... Animal experiments have confirmed the prolonged persistence of spores and incubation period after aerosol exposure. In one study, rhesus macaques were protected during a 30-day course of antibiotics after aerosol exposure. However, some animals developed fatal infection after the antibiotic therapy was disco...

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