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Tag: "iron" at biology news

U-M researchers use nanoparticles to target brain cancer

...rs incorporated a drug called Photofrin along with iron oxide into nanoparticles that would target cancerous brain tumors. Photofrin is a type of photodynamic therapy, in which the drug is drawn through the blood stream to tumor cells; a special type of laser light activates the drug to attack the tumor. ...

Particle size matters to bacteria ability to immobilize heavy metals

...ella influence the mobility and bioavailability of iron and environmental contaminants like lead, cobalt, ... Laboratory (PNNL), are looking at how the size of iron oxide nano particles influences the bacteria's ability to breathe. This is the first study by any gr...

Researchers examine why food tastes bad to chemotherapy recipients

...tional levels, and adverse health effect levels of iron and copper in water, and their relationship to hea...n drinking water contains metal ions, specifically iron and copper. Their research will also evaluate the use of antioxidants to prevent the metallic flavor...

Wheat gene may boost foods' nutrient content

...om wild wheat that increases the protein, zinc and iron content in the grain, potentially offering a solution to nutritional deficiencies affecting hundreds of millions of children around the world. Results from the study will be reported in the Nov. 24 issue of the journal Science. "Wheat is one of th...

Living laboratory found on shoreline statues

...ng colonisation. The installation of the cast iron figures - each a replica of the artist's own body, and identical in size, shape and material - offer a perfectly replicated study environment to test for the effects of different levels of exposure to the environment, currents and sea level on marine...

New evidence of early horse domestication

...ther hand, can be locked into place by calcium and iron and is more likely to be preserved in the soils for millennia. As it turned out, the soil from inside the alleged corral had up to ten times the phosphorus concentration as the soils from outside the settlement. Lots of phosphorus can also indicate...

MIT nanoparticles may help detect, treat tumors

...oparticles (billionths of a meter in size) made of iron oxide into the body, where they flow through the bloodstream and enter tumors. Solid tumors must form new blood vessels to grow. But because this growth is so rapid in cancerous tumors, there are gaps in the endothelial cells that line the inside of...

New finding points way to foiling anthrax's tricks

...ick while studying how these deadly bacteria steal iron from their human hosts to grow and reproduce. "...y the human immune system that disrupts bacteria's iron scavenging system," said Ken Raymond, UC Berkeley professor of chemistry and faculty scientist at La...

MRSA vaccine shows promise in mouse study

...ns, IsdA and IsdB, help the microbe acquire needed iron from the host's red blood cells. The other two, SdrD and SdrE, are thought to be involved in bacterial adhesion to host tissues. When tested alone as a vaccine, each of the four proteins provided only partial or no protection. Fifty to 70 percent...

Methane-belching bugs inspire a new theory of the origin of life on Earth

...orms themselves, perhaps associated with catalytic iron and sulfur minerals, gave rise to the first simple...lized that, in the presence of minerals containing iron sulfides, acetate could have been catalytically converted to a sulfur-containing derivative called a...

Metal homeostasis research in plants will lead to nutrient-rich food and higher yielding crops

...e engineered allele allows these plants to take up iron and renders them resistant to Cadmium. Transgenic seedlings have Cadmium levels similar to that of IRT1 loss of function plants, demonstrating that Cadmium transport through IRT1 has been eliminated. Furthermore, these plants have twice as much Iron...

DOE JGI finishes 100th microbial genome

...kable progress in understanding sulfur and ferrous iron oxidation, carotenoid and chlorophyll biosynthesis...duces sulfate, uranium, and toxic metals; corrodes iron piping; "sours" petroleum with hydrogen sulfide. Geobacter metallireducens. Derek Lovley, Universi...

Iron critical to ocean productivity, carbon uptake

...arge segments of the Pacific Ocean lack sufficient iron to trigger healthy phytoplankton growth and the ab...important because it looked at the availability of iron throughout the tropical Pacific Ocean instead of small portions of it. Behrenfeld and his colleagues...

NASA study solves ocean plant mystery

...hern portion of the tropical Pacific, while it was iron that was most lacking everywhere else," said Micha...ts are growing faster than less green plants. When iron is lacking, enhanced greenness does not mean phytoplankton are growing better. They are actually und...

U of MN uses robotic surgery techniques in cardiac cell therapy research

... the damaged hearts. The cells were "labeled" with iron particles so that researchers would be able to see if they engrafted in the pig hearts. The cells were successfully transplanted in six of seven cases. Subsequent MRI studies showed that the cells took hold in the heart and function improved. Th...

A bathroom that cleans itself

... dioxide nanoparticles with other elements such as iron and nitrogen so they can absorb light at longer wavelengths. Lab trials show that glass coated with the new nanoparticles can be activated by visible light from a lamp to kill Escherchia coli. "If you've got this on tiles or shower screens you don'...

Anthrax spores may survive water treatment

... of pipe made of either copper, CPVC or galvanized iron (a material no longer used for home plumbing but e... copper and CPVC pipes, 95 percent attached to the iron pipes. When biofilms were present on the interior of copper pipes attachment increased to 80 perce...

MIT chemist discovers secret behind nature's medicines

... agent syringomycin, he discovered it had a single iron atom in the protein's active site, the part respon...ining enzymes have three amino acids that hold the iron in the active site. In this enzyme, however, one of the typical amino acids was substituted with a m...

Carbon nanotubes that detect disease-causing mutations developed by Pitt researcher

...itary hemochromatosis, a disease in which too much iron accumulates in body tissues. "The size compatibility between the detector and the detected species-DNA molecules in this case-makes this approach very attractive for further development of label-free electronic methods," said Star, who is an assista...

Carnegie Mellon develops non-invasive technique to detect transplant rejection at cellular level

...r (USPIO)- or micrometer (MPIO)-sized paramagnetic iron oxide particles, which are very sensitive to the magnetic fields used during MRI. Wu injected the MPIO or USPIO particles into rats that had received heart transplants three days earlier. Macrophages, which typically ingest foreign materials inside t...

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