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Tag: "increasing" at biology news

Clean skies=faster global warming?

...vel approach to treating bacterial infection is by increasing the killing capacity of cells of the innate immune system. In a related commentary, Kol Zarember and Harry Melach write, "By dissecting the role of HIF-1 in innate immune defenses, the study…introduces new targets for therapeutic immunomodulation." ...

New book expands biological classifications to account for 'alien' life

...on this planet and we will continue to do so at an increasing pace," he said. "In the last five years we've come to realize that we can make microbial life in a lot more ways than Mother Earth did." Ward believes that if life is found away from Earth, at least some could be based on elements such as silicon, p...

Drug resistant avian influenza viruses more common in Southeast Asia than North America

... and therefore more likely to become extinct. The increasing incidence of amantadine-resistant H5N1 viruses in China indicates that these variants appear to have survival advantages over the wild, drug-sensitive strains. In addition, the infected birds die so rapidly there is no time for the virus to acquire a...

Does manganese inhaled from the shower represent a public health threat?

... streets and highways, may enter the water supply, increasing manganese levels in the water we drink and bathe in," said Spangler. ...

On a wing and a prayer - Alaska researchers seek clues to bird flu

...ed by a highly pathogenic H5N1 strain and there is increasing evidence that this strain can jump the species barrier and cause severe disease and mortality in humans. A second and even greater concern, according to the World Health Organization, is the possibility that the present situation could give rise to a...

New antibody shows promise as cure for anthrax

... the bacteria would continue to replicate, and the increasing amount of toxins would eventually overpower the treatment." In fact, results differed from the scientists' expectations, leading to the serendipitous discovery that the antibody effectively eliminates both the toxin and the anthrax bacteria. In tw...

Dalai Lama, top scientists to discuss science & clinical applications of meditation

...Haramati at 8am on Nov. 8 With Western medicine's increasing interest in meditation's affect on mental and physical well-being, the Mind & Life Institute, in partnership with the Georgetown University Medical Center, and the Johns Hopkins University School of Medicine will host "Mind & Life XIII: The S...

Applying ecological laws to bacteria

...achines studied, such as lathes and mills, were of increasing size and were said to be analogous to an archipelago of islands. Microbial communities impact greatly on life on Earth. They can help promote plant growth and protect plants against disease, as well as reducing pollution. The finding that microorgan...

Emerging staph strains found to be increasingly deadly and deceptive

...S. aureus, or MRSA, are difficult to treat and are increasing nationally at an alarming rate, say experts. Scientists at NIAID's Rocky Mountain Laboratories (RML) in Hamilton, MT, and colleagues examined the ability of MRSA strains to cause disease in mice and avoid destruction by human white blood cells calle...

Amphetamines reverse Parkinson's disease symptoms in mice

...ws that amphetamines -- normally thought to act by increasing dopamine concentrations in the brain ? correct the...e beneficial effects becoming more pronounced with increasing dose. The researchers also report that low doses of amphetamines could, when combined with L-DOPA, ...

Chernobyl: The true scale of the accident

...ce the incidence of spontaneous thyroid cancers is increasing significantly as the target population ages. Moreover, high quality cancer registries need continuing government support. In the environmental realm, the Report calls for long term monitoring of caesium and strontium radionuclides to assess human ex...

Researchers find gland that tells fruit flies when to stop growing

...gnals about a fly's weight. Enlarging the gland by increasing insulin signaling triggered metamorphosis at smaller sizes than usual. Suppressing the gland's growth by decreasing insulin signaling allowed larvae to grow larger than usual before entering the pupal stage that precedes adulthood. Mirth and her col...

Zinc supplements safe for HIV-infected children

...ld speed up HIV disease progression in children by increasing their viral load. Zinc supplementation is known to decrease the frequency of diarrhea and pneumonia in uninfected children. The study is published in the November 26, 2005, issue of The Lancet. "We set out to look at the safety and impact of zinc su...

Plant wounds trigger bacteria

...o replicate up to five times faster than normal by increasing the expression of a protein called RepC, which is required for replication of the plasmid. The extra copies of this DNA enhance the ability of the bacterium to cause tumors, which grow when a fragment of the plasmid DNA invades the plant's own DNA. ...

Fresh water affected by salt from deicing roads

...re roads, but the amount of deicing that occurs is increasing and gradually adding salt to fresh water systems reports Sujay Kaushal and colleagues in the September 2005 issue of the Proceedings of the National Academy of Sciences. The scientists used historical records over the last 30 years and direct mea...

Research Permits First-Ever Visualization of Psychological Stress in the Human Brain

...m this study is that while stress may be useful in increasing focus, chronic stress could also be detrimental to mental health," concludes Jiongjiong Wang, PhD, Assistant Professor of Radiology and principal investigator of the study. "How the brain reacts under psychological stress is an untouched subject for...

New amphibian species result from exploration, not from rule changes

...ns, new amphibian discoveries are a consequence of increasing exploratory effort, not of changing criteria for recognizing a species, or "taxonomic inflation." The authors of the new analysis, Jörn Köhler of the Hessisches Landesmuseum Darmstadt, Germany, and colleagues, conclude that "Taxonomic exploration is ...

Scientists must offer solutions for conserving tropical forests in a rapidly changing world

...nges may be caused by large-scale drivers, such as increasing carbon dioxide in the atmosphere, intense droughts, or other poorly understood phenomena. Wright, who has studied tropical forests and its plant and animal inhabitants since the late '70 at STRI, encourages tropical scientists to conduct assessments...

Scientists determine structure of enzyme that disrupts bacterial virulence

...e lactones can "turn on" a variety of genes, often increasing the virulence of the accumulating bacteria. This population-sensing results in a type of bacterial "group think" because certain genes are not turned on until a minimum number of bacteria are present. Hence, this phenomenon is called quorum-sensing...

Fish evolve a longer lifespan by evolving a longer reproductive period, researchers find

...n organism evolve a longer lifespan, they do so by increasing only that segment of the lifespan that contributes...to survive and pass on their genetic characters in increasing numbers to succeeding generations ?introduces changes in only a specific segment of an organism's li...

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