Tag: "exposed" at biology news
Pollution causes 40 percent of deaths worldwide, study finds
... areas, often without adequate sanitation, and are exposed
to epidemics of such diseases as measles and flu. With 1.2 billion people lacking clean water, waterborne infections account for 80 percent of all infectious diseases. Increased water pollution creates breeding grounds for malaria-carrying mosqui...
High blood pressure, low energy -- a recipe for heart failure
...fuel. In mice that lacked ERR alpha and that were exposed
to pressure overload, the researchers observed signs of early heart failure: the mouse hearts dilated and didn't contract effectively, the heart walls thinned, fibrous connective tissue accumulated and some heart cells died. They also saw that the he...
Smokeless tobacco more effective than cigarettes for delivering dangerous carcinogens into the body
... Center report that users of smokeless tobacco are exposed
to higher amounts of tobacco-specific nitrosamines...Minnesota researchers found that snuff users were exposed
to higher levels of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) than smokers. NNK is a huma...
New study suggests Concord grape juice may provide protection against breast cancer
...s from DNA damage. Healthy human breast cells were exposed
in a test tube to an environmental carcinogen, benzo(a)pyrene, that is able to initiate a chain of events leading to breast cancer. However, the introduction of Concord grape juice compounds blocked the connection of the carcinogen to the DNA of the ...
Other highlights in the Aug. 7 JNCI
... lung and several sites below the diaphragm (areas exposed
during radiation treatment for testicular cancer) had poorer survival than patients whose first cancers were in the same area. Treatment regimens for testicular cancer used since 1980 have not adversely affected survival from subsequently diagnosed...
Study: Sticking to the sand might not be such good, clean fun for beachgoers
...pular recreational beach in Monterey-and collected exposed
sand above the tide line that contained enterococci, bacteria also found in the intestines of warm-blooded animals. In a laboratory at Stanford, they ran filtered water from Monterey Bay over columns packed with the sand they had collected. What th...
New mechanism links smoking to lung damage
...e primary targets of cigarette smoke. When they exposed
these cells to low levels of an extract made from cigarette smoke, the non-junctional hemichannels opened. This allowed toxic molecules found in the smoke to flow directly into the cell, and vital metabolites such as ATP and NAD, to leak out, leading...
Improved NIST SRM aids lead poisoning detection
...evels, seizures, coma and death. Children can be exposed
to lead from lead-based paint in older buildings, or from contaminated soil near highways where vehicles once used leaded gasoline. Lead levels in children have dropped since lead was banned from both paint and fuel, but they remain significant. In 1...
Identified mechanism in the malaria parasite to help it adapt to infected individuals
...rum, which appears in the stage of a merozoite, is exposed
to antibodies from the immune system. Consequently, the proteins of the merozoite that interact with red blood cells are a possible weak point, and thus a very clear target to develop vaccines. Alfred Corts, an ICREA researcher working at IRB Barcelo...
Unlocking proteins from their cellular shell
...ow that hidden and folded parts of proteins can be exposed
by physical strain, not just by chemical reaction....e current issue of the journal Science. Cells are exposed
to forces every minute of every day. Some forces are exerted by the flow of bodily fluids, such as ...
Where broken DNA is repaired
... the study. "On a trip to Mars, astronauts will be exposed
to cosmic rays for as long as three years, so NASA...duced foci In many NASA studies cells have been exposed
to particles like those found in cosmic rays, such as energetic iron nuclei produced in accelerators...
Altering a protein makes mice less fearful
...certain predators even though they have never been exposed
to a predator. However, little is known about the ...nse of smell. "These lab animals have never been exposed
to a predator. The freezing response seems hardwired and intuitive," said Matthew Coryell, a UI grad...
Taming the anthrax threat
... is needed because antibiotics given now to people exposed
to anthrax spores, though they work, cause serious gastrointestinal effects during the 60 days people need to take them. Many people do not complete the full course of treatment. An improved drug would knock out the anthrax microbe but leave the norm...
Nanotechnology helps scientists make bendy sensors for hydrogen vehicles
... the change of resistance of the device when it is exposed
to hydrogen molecules. According to Sun, these s...ow a change of 75 percent in their resistance when exposed
to hydrogen at a concentration of 0.05 percent in air. The devices can detect the presence of 1 perc...
New data reveal pregnancies exposed to accutane despite risk management program
...gram designed to prevent pregnant women from being exposed
to the anti-acne medication Accutane and similar m... birth defect-causing agent), 122 pregnancies were exposed
during the first year of the program, known as iPledge, a report revealed. The March of Dimes Foun...
Stem cell therapy rescues motor neurons in ALS model
...n of motor neurons." But while the motor neurons exposed
to GDNF were protected, the Wisconsin team was unable to detect the connections between the neurons and the muscles they govern. "Even in animals that had lots of motor neurons surviving, we didn't see the (muscle) connection, which explained why w...
American Chemical Society's Weekly PressPac -- July 25, 2007
...therapies, the new study notes. The researchers exposed
immature mouse muscle cells (myoblasts) growing in...n a group of human skeletal muscle cells that were exposed
to the same chemical for several days, they add. In conclusion, we have developed the first small...
MIT model could predict cells' response to drugs
...gnaling pathways after colon epithelial cells were exposed
to a variety of environmental stimuli. The behavio...happen to two other types of epithelial cells when exposed
to the same stimuli. "Cells appear to be adding up information across multiple pathways in a commo...
Waters off Washington state only second place in world where glass sponge reefs found
...ld discovered on the open Washington shelf is very exposed
to winter storms, which makes it much more likely that other reef-building glass sponges are still to be found around the globe, for example, on the Alaskan and Russian continental shelves, Johnson says. Solitary glass sponges are found living in ma...
Caffeine and exercise can team up to prevent skin cancer
... Sciences (PNAS). Groups of hairless mice, whose exposed
skin is vulnerable to the sun, were the test subje...dnt run and didnt caffeinate. All of the mice were exposed
to lamps that generated UVB radiation that damaged the DNA in their skin cells. Some degree of pr...
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