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Tag: "metal" at biology news

Microbes at work cleaning up the environment

...from an abandoned mine excrete proteins that cause metal nanoparticles to aggregate. The bacteria are bindi...gregation, thereby protecting themselves. When the metal nanoparticles aggregate, they don’t move as easily and are less soluble. Using secondary ion mass...

Plastic that grows on trees

...ith a novel non-acidic catalytic system containing metal chloride catalysts in a solvent capable of dissolv... The solvent, called an ionic liquid, enabled the metal chlorides to convert the sugars to HMF. Ionic liquids provide an additional benefit: It is reusable,...

In nature, proteins sweep up nanoparticles

...orld in which bacteria emit proteins that sweep up metal nanoparticles into immobile clumps. Their finding ...ay lead to innovative ways to remediate subsurface metal toxins. The research, which appears in the June 15, 2007 issue of the journal Science, reveals that...

Students invent protective pouch to enhance cell therapy

...a porous band of nylon mesh between two concentric metal stents, similar to the ones used to keep clogged b... nylon mesh. The inner stent is made of nitinol, a metal that snaps back into its original shape after being compressed for insertion. The inner stent matche...

The longest carbon nanotubes you've ever seen

... the new substrate--a catalyst made of alternating metal and ceramic layers atop an oxidized-silicon wafer base--which served as the foundation for growth. "This process is revolutionary because it allows us to keep the catalyst 'alive' for a long period of time thus, providing fast and continuous trans...

Study warns deep-sea mining may pose serious threat to fragile marine ecosystems

... growing rapidly, and along with the sharp rise in metal prices, we have seen the depletion of metal-rich terrestrial mines," says Halfar. "For mining companies and their investors, undersea mining offers high concentrations of ore at relatively low production costs." The mining operations will use a st...

Progress toward artificial photosynthesis?

... needed to split them. To date, only a few special metal catalysts are known to be capable of breaking the C–O bonds in CO2. In contrast to most previous approaches, Antonietti’s team worked with metal-free catalysts, turning toward plants for inspiration. Photosynthesis in modern green plants involves ...

Putting an old drug to a new use

...of its iron to make red blood cells. A lack of the metal can lead to dangerous anemias, but also too much iron can be detrimental as iron promotes the formation of toxic radicals leading to tissue damage. Iron overload is the consequence of one of the most common genetic disorders in Europe, hereditary hem...

Study to explore using magnets to correct 'sunken chest'

...to open and rebuild the chest and the insertion of metal struts to hold the chest in place while it heals. Complications can occur because the struts are under significant pressure, and the painful recovery can take months. "The problem with present techniques is that they attempt to reshape the chest w...

Trojan horse strategy defeats drug-resistant bacteria

...o accomplish this, the researchers used gallium, a metal very similar to iron. "Gallium acts as a Trojan horse to iron-seeking bacteria," said Singh. "Because gallium looks like iron, invading bacteria are tricked, in a way, into taking it up. Unfortunately for the bacteria, gallium can't function lik...

Researchers uncover protection mechanism of radiation-resistant bacterium

...sitive bacterial cells had significantly different metal concentrations, pointing to high levels of manganese and low iron levels as possible influences on cellular recovery following irradiation. The team showed that the most resistant bacterial species contained approximately 300 times more manganese and...

Lead with a poisonous electron shield

...reversible. Complexation agents that grab onto the metal cations are used as antidotes. However, these agen...fic, meaning that they also remove other important metal cations from the body. C. Gourlaouen and O. Parisel (Laboratoire de Chimie Théorique, Université ...

Ultrasound upgrade produces images that work like 3-D movies

...irst generated stereo ultrasound images of a small metal cage. They then advanced to ultrasound images in living animals of a heart valve and blood vessels and needle biopsies of the animals' brains and esophagi. The researchers have since recorded ultrasound images of a model human fetus that is tradit...

In presence of fragrant cleaning products, air purifiers that emit ozone can dirty the air

...particles and electrostatically attracting them to metal electrodes. Ozonolysis purifiers emit ozone at higher levels on purpose with the ostensible goal of oxidizing volatile organic compounds in the air. This research appeared online this morning in Environmental Science and Technology. "The public...

Research to spotlight carbon monoxide benefits

...hulme Trust for a three-year study into the use of metal compounds for the controlled release of carbon monoxide into the bloodstream. Carbon monoxide is an anti-inflammatory, and they want to explore its potential in treating high blood pressure, heart disease and possibly cancer. The project builds on...

'Hidden-hero' microbes in soil, water may help naturally clean toxic sites

...robiology" portion of the project. "Radioactive metal contamination such as that found at the Oak Ridge Field Research Center (ORFRC) where we will be working is a huge global issue," Kostka said. "It affects not only the U.S. but in particular, also Eastern Europe, Canada and South America, and the cos...

Widely used iron nanoparticles exhibit toxic effects on neuronal cells

...noparticles with DMSA (dimercaptosuccinic acid), a metal binding agent that polymerizes on the particles' surface. This coating keeps the particles from clumping together in an aqueous solution, and facilitates their engulfment by the PC12 cells via an inward pouching of the cell membrane called endocytosi...

Researcher examines polymers created with poultry feathers

...ies can also be modified using divalent transition metal ions to affect stiffness and smell. These will help the keratin polymer be processed faster, be more aesthetically pleasing, and become water resistant and stronger for increased longevity. ...

New UD technology removes viruses from drinking water

...ch more efficiently than those that didn't contain metal oxides. "We knew that iron had been used to treat a variety of pollutants in groundwater, but no one had tested iron against biological agents," Chiu said. So the two researchers decided to pursue some experiments. With partial support from the...

Cancer cells forming blood vessels send their copper to the edge

...o have broad implications on the regulation of the metal ion content in metal-binding proteins. If such dra...idly during angiogenesis, then the interactions of metal ions, such as copper, with the proteins and macromolecules that bind them in the cell must have very...

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