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Tag: "metallic" at biology news

'Terror bird' arrived in North America before land bridge, study finds

... earth elements are a group of naturally occurring metallic elements that share similar chemical and physical properties. "It was previously thought that Titanis immigrated to Texas across the Panamanian land bridge that formed about 3 million years ago connecting North and South America," said MacFadden, a...

Gold nanoparticles prove to be hot stuff

...eter-wide gold beads, as expected because of their metallic nature, can be trapped and detected six times more easily than polystyrene particles of a similar size. However, the scientists also found that gold absorbs light and heats up quickly, by a remarkable 266 degrees (Celsius) per watt of laser power, ...

Researchers examine why food tastes bad to chemotherapy recipients

...emotherapy find foods and beverages to have a foul metallic flavor, according to a medical study. In general, ... Dietrich believes there are two components to the metallic flavor –?the taste of metal ions on the tongue and the production of metal-catalyzed odors in the mo...

Study supports 'urgent' need for worldwide ban on lead-based paint

...nd traditional medications, ceramic dinnerware and metallic toys and trinkets. In a two-year study headed by Scott Clark, PhD, the UC-led research team found that more than 75 percent of the consumer paint tested from countries without controls--including India, Malaysia and China--had levels exceeding U.S...

Sandia work launched on space shuttle shows live cells influence growth of nanostructures

...so direct their own landscaping. They can organize metallic nanocrystals added at the cell surface. These may enhance the sensitivity of Raman spectroscopy for monitoring the onset of infection or the course of therapy. The cells also localize proteins at the cellular interface. Assistant Professor Graham T...

Cincinnati surgeons report new treatment for often-fatal injury

...y placing a standard surgical stent--a tube-shaped metallic support structure--in the aorta and lining it with a series of small synthetic grafts (endografts) they could effectively protect the damaged area without stopping blood flow to the rest of the body. The endografts are regularly used in vascular su...

Cellular scale drug delivery from the inside out

...ndrimers, biodegradable polymers, genes, proteins, metallic nanoparticles, or semiconductor nanocrystals ?also known as quantum dots ?and are held in place by chemical bonds. Once the nanospheres are inside the target cells, a trigger is used to pop the caps off and release the drug. "We're looking at two le...

Bare metal stents deliver gene therapy to heart vessels with less inflammation in animal studies

...l uses in other areas of medicine that make use of metallic implants. Cardiologists frequently treat heart disease patients now by using stents to expand partially blocked blood vessels and improve blood flow. However, new obstructions may gradually form within the stents themselves and dangerously narrow th...

Emerald Spectre haunts Ontario's ash forests

...Institute for Environmental Research. The small, metallic green beetle ?adults are about the length of a thumbnail ?was first detected following an unusual dieback of ash trees in southeastern Michigan and southwestern Ontario in the summer of 2002. A native of southeast Asia, the insect is capable of rapid...

Metal-containing compounds show promise as HIV weapon

A molecule consisting of two "cages" of metallic atoms bound to carbon has shown great promise in preliminary tests of becoming a new weapon in the anti-HIV arsenal, researchers at UT Southwestern Medical Center report. The molecule - called metallacarborane - and its variants appear to fight HIV p...

New technique helps identify multiple DNA regulatory sites

...ingle-electron transistors, optical biosensors and metallic wires, to name a few. Stellacci recently received renewed funding from the Deshpande Center for Technological Innovation to continue work on SuNS. The work is also funded by the National Science Foundation. A version of this article appeared in the...

New technique may speed DNA analysis

...ingle-electron transistors, optical biosensors and metallic wires, to name a few. Stellacci recently received renewed funding from the Deshpande Center for Technological Innovation to continue work on SuNS. The work is also funded by the National Science Foundation. A version of this article appeared in the...

Redesigned protein accelerates blood clotting

...rm a web-like clot over damaged tissue. Calcium, a metallic element, must be present for factor VIII to work. Factor VIII has on its surface pocket-like chains of amino acids shaped to hold calcium ions (calcium binding sites). When calcium bonds to it, factor VIII changes shape and becomes better able to bin...

Study shows nanoshells ideal as chemical nanosensors

... discovered almost three decades ago thatroughened metallic surfaces could enhance Raman scattering signals by...a core ofnon-conducting glass that is covered by a metallic shell, typicallyeither gold or silver. The metal shell "captures" passing light andfocuses it, a pro...

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