Tag: "metal" at biology news
Microbiology team probes bacterium's surprising survival tactics
...es is apparently able to locate and home in on the metal
that serves as its food source. "This is the firs...ith. No one had looked carefully at growth on the metal
oxides that Geobacter actually uses in natural environments. When the researchers looked at culture...
Urbana chemist wins national award for contributions to cleaner fuels
... really homed in on is a class of compounds called metal
sulfides — catalysts that take sulfur out of oil and coal, so they dont make as much acid rain. However, catalysts — chemistrys highly skilled construction workers — are often such complicated molecules that they are hard to watch i...
Argonne chemist wins national award for studies of plant energy
...aboratory system uses nanocrystalline particles of metal
oxides. As light pumps energy into a particle, electrons from molecules attached to the surface of the particle can move into the particle. The greater the distance between the excited electrons and the resulting holes, the more likely the energy tra...
APS announces its 2002 Young Investigators Awards
...ch focuses on nitric oxide signal transduction and metal
ion (zinc) homeostasis in pulmonary vascular endothelial cells. Dr. St. Croixs specific goals are to investigate how nitric oxide-induced changes in intracellular zinc affect gene expression and cell survival. Mai-Lan N. Huynh, M.D. University of...
Portable unit created to treat wastewater in remote locations
...an easily be operated in an ISO container, a large metal
box that looks like a tractor trailer frame. In addition to use in war areas, the unit will be fairly economical so it could be used for such emergency situations as hurricane and earthquake disaster areas. UTD is also in the process of designing c...
'Back at square one' to find culprit in familial ALS
...ice." Because free copper is deadly to cells, the metal
is carried to and fro by proteins called chaperone... copper (copper-64) to "trace" distribution of the metal
in the mice and proved that copper isn't reaching SOD1. "Taking away CCS dramatically decreased the ...
Physics tip sheet #3 March 6, 2002
...ccount for the slip-stick friction observed as two metal
surfaces slide over each other. The measurements of this microscopic phenomenon were performed with a fiber-optic cantilever surface probe microscope that is sensitive to sub-nanoscale motions. Preprint: http://www.arxiv.org/abs/cond-mat/0203075 2)...
Office of Naval Research awards $8.4M to young investigators
...ill investigate the effects of laser processing on metal
powders with particular focus on selective laser sintering and laser powder re-melting as well as the effects on post-processing of sintered parts by infiltration. The development of parameterized models will lead to the ability to predict mechanica...
Common microbes survive pressures equal to those found at 50 kilometers inside the Earths crust
...s-E. coli commonly found in the human gut, and the metal
reducing Shewanella oneidensis-to pressures up to 16 thousand times the pressure found at sea level. This is a very high-pressure condition for biology. Since liquid water turns into a solid high-pressure ice even at room temperature, these condition...
NSF/EPA team up on grants to treat pollution with plants
...omes of brassicaceous plants for genes involved in metal
hyper accumulation. A third will study the mechan...be used to develop transgenic plants that are both metal
hyperaccumulators and produce high shoot biomass, and thus well suited for the phytoremediation of m...
Cell interactions in spermatocyte apoptosis
...iological studies, but male rats treated with this metal
reliably decrease their production of mature sperm...ptosis, suggesting that some other aspect of heavy metal
toxicity is required for the response. Germ cells apparently die prior to meiosis, since the Fas lig...
What remains to be discovered in Central American forests
...mix of metals used to mint a penny tells you about metal
availability, wars and shortages, new supply sources. Likewise, a plant collection yeilds many secrets about the natural history and functioning of a forest. The shape of a flower blossom may tell us what insect is absolutely essential for its poll...
U. of Colorado researchers identify switch that controls aging in worms
...rk have been linked to oxygen metabolism. Just as metal
rusts when it is exposed to certain oxygen compounds, so do living cells, he said. "The longer lived species of C. elegans have a higher resistance to free radicals and environmental stress," said Johnson. When DAF-16 is located in the cytoplasm of c...
New portable device senses chemical weapons
...version of this device made with a single block of metal
where all the metal
junctions, such as welds and bolts, are removed....
NIST 'microhotplate' may help search for extraterrestrial life
... tiny machined structure consisting of a heater, a metal
thermometer/heat distribution plate and electrical contacts, all separated by insulating layers. Sensing films are deposited on the structures. The device relies on changes in electrical conductance in the sensing film to detect the presence of adso...
Arsenic and old telomeres
...just such an effect. They show here that the toxic metal
arsenic, which has proved helpful in controlling otherwise intractable leukemias, blocks transcription of one of the telomerase subunits in an apparently specific fashion. Treating tumor cells with moderate levels of arsenic mimics the effect seen in...
Mutant proteins may be key to defeat chemical warfare
... the enzyme - or "active site" - contains two zinc metal
ions. Raushel and his collaborators have also studied the structure of the enzyme when it binds to a compound. The scientists identified three binding pockets, designated as the "small," "large," and "leaving group" subsites. "The binding pockets are...
Chemical pollution and human sewage could be killing corals
... the present trilogy of disease distribution, high metal
concentrations and presence of human pathogens creates a signpost, at least, that human pollution is playing a role....
A fish named Wayne-Wanda?
...r dental treatment and to coat food cans and other metal
containers), had little or no estrogenic effects on the fish. He believes that it is the female estrogen hormones released from sewage treatment plants that are responsible for the feminization of wild fish....
MIT instrument monitors molten materials
...n indicate the chemistry and quality of a glass or metal
product." The MilliWave Viscometer is special because it works at the temperatures of molten glass and metals. "Its maximum temperature of operation is more than 1,000oC higher than viscometers currently on the market." Another type of viscometer th...
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