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Tag: "harmful" at biology news

US Army plans to bulk-buy anthrax

.... Although the Sterne strain is not thought to be harmful to humans and is used for vaccination, the contracts have caused major concern. "It raises a serious question over how the US is going to demonstrate its compliance with obligations under the Biological Weapons Convention if it brings these tanks onl...

Bacteria recognize antimicrobials, respond with counter-defenses

... chemicals, called antimicrobial peptides, to kill harmful bacteria. In a counter move, some disease-causing bacteria have evolved antimicrobial detectors. The bacteria sense the presence of antimicrobial peptides as a warning signal. This alarm sets off a reaction inside the bacteria to avoid destruction. ...

Discovery of T-cell 'traffic control' boosts new drug promise

...T cells -- usually prevents T cells from launching harmful reactions. But when the S1P traffic cop reacts inc... swamping newly transplanted organs or launching a harmful autoimmune reaction, the scientists suggest in the paper. They think this mechanism underlies the p...

Molecular miners find pain relief drugs from the sea

...ls hunt marine worms or other molluscs and are not harmful to humans. It may seem unusual that toxic venoms can also be a source of pain relieving medication for humans. Associate Professor Livett explains, "It appears that cone snails have adopted the general strategy of including a pain-reducing componen...

Primate virus jumps species barrier to humans for first time in Asia

...n that there are other primate viruses known to be harmful that could jump the species barrier. They don't want people to be afraid of coming in contact with macaques or other primates, but they do urge people to be cautious and careful when interacting with monkeys. Feeding the animals, or even carrying foo...

UF researchers kill resistant bugs one bandage at a time

... bedding and gowns - kills the two most common and harmful types of antibiotic-resistant bacteria that cause ...r this year, and the coating's ability to wipe out harmful bacteria and fungi was later confirmed in independent laboratory tests. The coating also was design...

Colorful bacteria more dangerous

...Medicine shows that gold-colored bacteria are more harmful than their unpigmented relatives. A group of scientists led by Victor Nizet (UCSD, San Diego, CA) have discovered that the molecules that give certain bugs their color also help them resist attack by immune cells called neutrophils. Scientists and c...

Carnegie Mellon cyLab researchers work to develop new red tide monitoring

...oping a spatiotemporal data mining system to track harmful ocean objects from NASA's SeaWiFS satellite images and NOAA's oceanographic data. These harmful ocean objects, known as red tide, include a naturally occurring microscopic algae Karenia brevis, wh...

Toxic flood lifts lid on common urban pollution problem

...Florida professor who has spent years studying the harmful contaminants that turn up in urban runoff, or rain...last week showed high levels of bacteria, lead and harmful levels of chemicals including arsenic, according to the Environmental Protection Agency. While the ...

Study uncovers dirty little secret: Soil emissions are much-bigger-than-expected component of air pollution

...ary ingredients in ground-level ozone, a pollutant harmful to human health and vegetation. But new research led by a University of Washington atmospheric scientist shows that, in some regions, nitrogen oxides emitted by the soil are much greater than expected and could play a substantially larger role in se...

New study shows SARS can infect brain tissue

...ith other pathogens could also contribute to SARS' harmful effects on the brain. "Physicians should pay more attention to the prevention of brain damage if [SARS patients] are superinfected with other conditional pathogens," according to Dr. Xu and Dr. Jiang. ...

A radical solution for environmental pollution

...manage to do that: by harnessing other potentially harmful chemicals known as free radicals to degrade the toxins they live on. Such insights could lead to new ways of engineering bacteria to clean up environmental messes, said associate professor of chemistry E. Neil Marsh, who did the work with postdoctor...

Acid water in East Java threatens biodiversity and local welfare

...l effects of the acidic water. As well as having a harmful effect on the well-being of the local population, it adversely affects the biodiversity. Lohr sampled the water at various locations. She observed that the neutral river water contained normal aquatic fauna, but that only mosquito larvae could surv...

Scavenger cells could be key to treating HIV-related dementia

...phages migrate there in a constant stream, causing harmful inflammation. Nearly 15 percent of HIV patients develop dementia as their disease progresses. But understanding the routes macrophage cells take in the brain could help researchers find ways to block the migration and prevent HIV-associated dementia...

Genetic variation alters response to common anti-clotting drug

...le take the anticoagulant drug warfarin to prevent harmful clotting after a heart attack, stroke, or major surgery. But the proper dose of warfarin can vary greatly and can be hard to predict. Some of this variability may boil down to a recently identified gene involved in blood clotting, according to a new ...

Dendritic cells offer new therapeutic target for drugs to treat MS and other autoimmune disease

...gnaling could stop dendritic cells from triggering harmful responses against a patient's own body," says Donald Small, M.D., Ph.D., professor at the Johns Hopkins Kimmel Cancer Center, whose findings appear in the November 15 issue of the Proceedings of the National Academy of Sciences. Preliminary clinical ...

Emerging staph strains found to be increasingly deadly and deceptive

... Neutrophils, which typically ingest and then kill harmful bacteria, make up about 60 percent of all white blood cells and are the first line of defense against bacteria. Scientists know that community-acquired strains differ from hospital strains, but they don't know why the community strains cause more ser...

MicroRNAs have shaped the evolution of the majority of mammalian genes

...d others are evolving in order to avoid developing harmful ones." ...

A bug's life: Exceptional genomic stability yet rapid protein evolution in a carpenter ant mutualist

...suggest that most changes in proteins are slightly harmful to the bacterium and by extension, to its host. "Overall, the picture emerging is one of genome deterioration, with the loss of many gene functions, and extreme genome stability," says Wernegreen. "This genomic stability may prevent the reacquisitio...

Scientists characterize proteome of human cornea

...ding the eye from germs, dust, UV light, and other harmful matter and acting as the eye's outermost lens. Approximately 120 million people in the United States wear eyeglasses or contact lenses to correct nearsightedness, farsightedness, or astigmatism. These vision disorders are often the result of incorre...

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