Tag: "harmful" at biology news
'Failed' experiment yields a biocontrol agent that doesn't trigger antibiotic resistance
...brought together, the plasmid carrying them became harmful
by over-replicating within the bacterium, ultimate...even though typically when bacteria are exposed to harmful
agents like antibiotics, resistant strains emerge. Nothing with the killer plasmid survived." The ...
Record ozone loss during 2006 over South Pole
... as a sunlight filter shielding life on Earth from harmful
ultraviolet rays. Over the last decade the ozone level has lowered by about 0,3% per year on a global scale, increasing the risk of skin cancer, cataracts and harm to marine life. The thinning of the ozone is caused by the presence of pollutants i...
UC develops new approach to Web-based drug withdrawal warnings
...cularly that involving withdrawal of a potentially harmful
medicine. "However," says Embi, assistant profe... after their withdrawal, which occasionally causes harmful
effects," Embi explains, "so it's important to inform the public as quickly as possible." Before d...
Crickets on Hawaiian Island develop silent wings in response to parasitic attack
...gesting thatbehavior can help what may seem like a harmful
mutation spread. The research team, led by Marlene Zuk, a professor of biology, found that greater than 90 percent of male field crickets ( Teleogryllus oceanicus ) on Kauai shifted in less than 20 generations from having normal wings to mutated ...
A wolf in sheep's clothing: Plague bacteria reveal one of their virulence tricks
...t Prehna's mutation drastically lowered Yersinia's harmful
effects. "Altering this binding site not only impairs the bacteria's ability to disrupt the host cytoskeleton," Stebbins says, "but it decreases its virulence significantly." "It's rare to find something that has such a strong effect that you can hi...
Bitter taste identifies poisons in foods
...olved as a defense mechanism to detect potentially harmful
toxins in plants. The Current Biology paper provi...cosinolates, a class of compounds with potentially harmful
physiological actions, in natural foods. "The findings show that our taste receptors are capable ...
The sweet science: Viruses switch grip to gain upper hand
...pasta. Even viruses - those bits of occasionally harmful
genetic material enclosed in shells of protein an...ild MVMp virus mutated slightly, suddenly becoming harmful
to the defenseless mice. "One or two changes in amino acids made the difference between a virus t...
New catalyst removes harmful perchlorate from groundwater
...ses hydrogen gas to efficiently remove and destroy harmful
perchlorate in contaminated groundwater. Found in solid-rocket fuel, roadside flares and fireworks, perchlorate is a dangerous contaminant that can disrupt thyroid function by interfering with the uptake of iodine. Infants and fetuses are believed to...
New National Institute of Mental Health research program launches autism trials
...not chelation therapy is beneficial or potentially harmful
to children with autism," says Susan Swedo, M.D., who leads the branch on pediatric behavioral research in the NIMH Division of Intramural Research Programs, where the autism studies are being conducted. Autism is a mental disorder that arises in ...
Cell-regulating gene may predict survival outcomes for breast cancer patients
...STAT3--which promotes cell overgrowth and prevents harmful
cells from dying, explains Doris Germain, PhD, Assistant Professor of Medicine. Dr. Samuel Waxman, the Albert A. and Vera G. List Professor of Medicine, and Clinical Professor of Medicine (Hematology and Medical Oncology) and Oncological Sciences, ...
Bacteria beat the heat
...ediate conditions. This may protect the cells from harmful
swings in enzyme activity. We can envision using this knowledge, for instance, to facilitate enzymatic reactions in different applications, enhance crop production in areas subject to extreme temperature changes or create new resources for biofuel pr...
First human study confirms that immune cells can be a primary cause of bone loss in gum disease
...rch validates our hypothesis that immune cells are harmful
in gum disease," said Dr. Kawai. "It's a groundbreaking discovery because it truly gives a new understanding of periodontal disease, while also raising interesting questions about immune cells. We hope this work will help us save people's teeth in th...
Scientists uncover critical step in DNA mutation
.... "Perhaps such inherent complexity guards us from harmful
mutagenetic events occurring more frequently, and it is possible that similar principles may hold in other important processes of biological relevance." "This type of research requires the development of new modeling strategies and significant comp...
Cigarette smoke blocks cell repair mechanism, University of Florida study shows
...maged and sitting there it's going to provide some harmful
effect later on." Jose Russo, M.D., a researcher at the Fox Chase Cancer Center in Philadelphia who has studied how breast epithelial cells transform after exposure to the chemical benzo[a]pyrine, which is found in tobacco smoke, called the UF find...
Researcher hits bulls-eye for antibiotic target
...ses because that same protein is found in numerous harmful
bacteria, including those that cause ulcers, leprosy, food poisoning, whooping cough, meningitis, sexually transmitted diseases, respiratory infections and stomach cancer, said David Sanders, an associate professor of biology. Sanders, who is part of...
Tips from the journals of the American Society for Microbiology
...rulence of Listeria monocytogenes, one of the most harmful
food-borne pathogens plaguing the U.S. today, say researchers from New York. They report their findings in the August 2006 issue of the journal Applied and Environmental Microbiology. L. monocytogenes is attributed to 28% of all deaths in the U.S....
Research reveals inner workings of immune system 'thermostat'
...ough of the pro-inflammatory warriors that destroy harmful
bugs and cause inflammation. This finding established the notion that tyk2 signaling controlled Interleukin 12, the furnace side of the system. But what controlled Interleukin 10, the air conditioner? To find out, Yap and his team conducted a serie...
Fatty spheres loaded with siRNA shrink ovarian cancer tumors in preclinical trial
... use to silence genes, shutting down production of harmful
proteins," Sood says. "It works well in the lab, but the question has been how to get it into tumors." Short pieces of RNA don't make it to a tumor without being injected directly, and injection methods used in the lab are not practical for clinica...
New research points toward mechanism of age-onset toxicity of Alzheimer's protein
...expected two-pronged strategy to rid themselves of harmful
aggregates. Kelly explains, "One pathway disaggregated beta amyloid fibrils, while the other actively packed them into high molecular weight aggregates. But the latter only kicks in when the cell is left with no other options." The surprise was th...
USGS at 2006 International Mercury Conference
..., captive breeding studies with mallards show that harmful
thresholds of mercury in eggs are as little as .8 ...s per million of mercury. But how much mercury is harmful
in the eggs of wild species? USGS scientists collected wild bird eggs from the field and injected t...
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