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Tag: "metals" at biology news

Microbes at work cleaning up the environment

...ate. The bacteria are binding and immobilizing the metals in the nanoparticles and the nanoparticles themsel...ria. Sulfate-reducing bacteria can cause heavy metals such as zinc (Zn) to precipitate and form nanoparticles. However, these particles are able to move f...

In nature, proteins sweep up nanoparticles

...bioremediation strategies designed to trap harmful metals such as arsenic, lead, uranium, and plutonium. “We have found, in the environment, that cells release proteins and polypeptides which promote the aggregation of nanoparticulate metals,” says John Moreau, lead author of the study and a former PhD s...

Egyptians, not Greeks were true fathers of medicine

...n physicians treated wounds with honey, resins and metals known to be antimicrobial. The team also discovered prescriptions for laxatives of castor oil and colocynth and bulk laxatives of figs and bran. Other references show that colic was treated with hyoscyamus, which is still used today, and that cumi...

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

...e often weaker or non-existent. "The demand for metals is 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 lo...

Pitt study notes decline in male births in the US and Japan

...th. “We know that men who work with some solvents, metals and pesticides father fewer baby boys. We also know that nutritional factors, physical health and chemical exposures of pregnant women affect their ability to have children and the health of their offspring. We suspect that some combination of these ...

A sweet step toward new cancer therapies

... Hakansson's group has been exploring the use of metals such as calcium and iron to carry the necessary po... structures, rather lopping off branches. By using metals as charge carriers, the researchers were able to do just that, yielding valuable structural informat...

Monitoring poisons in the environment -- a woolly matter

Heavy metals are present in variable amounts in the natural env... bio-monitoring device for natural levels of heavy metals in the Lake District and Wales at the Society for Experimental Biology’s Annual Meeting in Glasgow (...

BC catalyst discovery promises faster, cheaper drug production

...gle transformation. The substance also contains no metals and is therefore more environmentally friendly than many other catalysts. "The new catalyst is easy to prepare, requires little or no solvent and therefore minimizes waste, and can be used in air and can be recycled several times," Prof. Snapper ad...

Silver bullet: UGA researchers use laser, nanotechnology to rapidly detect viruses

... Richard Dluhy experimented with several different metals and methods and found a way to significantly amplify the signal. Using a method they've patented, they place rows of silver nanorods 10,000 times finer than the width of a human hair on the glass slides that hold the sample. And, like someone positio...

Particle size matters to bacteria ability to immobilize heavy metals

...These metal particles may also have adsorbed heavy metals on them. As a result, Shewanella influence the mobility and bioavailability of iron and environmental contaminants like lead, cobalt, and arsenic. Ph.D. student Saumyaditya Bose and Professor Michael Hochella Jr., both in geosciences in the Colleg...

Researchers examine why food tastes bad to chemotherapy recipients

... accordingly," Dietrich said. In correct amounts, metals in drinking water are actually important sources of micronutrients in the human diet. In fact, iron and copper are commonly found in drinking water, and they can be an important source of these mircronutrients. However, there are thresholds. If ing...

Iowa State researchers improving plastics made from corn and soy proteins

...has developed. The bio-based lubricant rubs off on metals ?it, for example, can be used to help locomotive wheels roll more easily around curves in a track. Senti said biodegradable plastics that add rigidity to the company's product would be very useful in outdoor applications. And so the company wants to ...

Researchers discover how bacteria sense their environments

...micals, light, ionic strength (salt), pH and heavy metals with great sensitivity, gain and dynamic range. Scientists are interested in developing synthetic systems with such sensing properties as well as engineering bacteria that respond to stimuli such as pollutants or explosives. Using a combination of X...

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

...e the ability to quantify the amount of particular metals present in various plant tissues has proved very i...eagues would also like to be able to see where the metals are distributed within various plant organs. "We have used X-ray fluorescence microtomography to ...

Encoded metallic nanowires reveal bioweapons

...ng template-assisted electrochemical deposition of metals within the tiny cylindrical pores of alumina membranes. When deposited gold and silver are alternated in a defined way, nanowires with different characteristic stripe patterns are produced. The pattern of optical reflections from each sequence of str...

DOE JGI finishes 100th microbial genome

..., Pacific Northwest National Laboratory. Degrades metals including uranium, technetium, and chromium; important in carbon cycling in anaerobic environments. The entire list of the DOE JGI 100 can be found at: http://genome.jgi-psf.org/microbial . ...

Mystery solved: Gold's power against autoimmune diseases defined

...ses for more than 75 years, but until now, how the metals work has been a mystery. Harvard Medical School r... of gold, platinum, and other classes of medicinal metals work by stripping bacteria and virus particles from the grasp of a key immune system protein. "We w...

Study may help slay 'Yellow Monster'

...an get a mutation," Stearns explained. Other heavy metals are known to bind to DNA, but Stearns and her colleagues are the first to identify this trait with uranium. Their results were published recently in the journals Mutagenesis and Molecular Carcinogenesis. Their findings have far-reaching implicatio...

Two NIH initiatives launch intensive efforts to find roots of common diseases

...entify prior exposures to potential toxins such as metals and solvents. NIH also will assess disease indicators like inflammation and oxidative stress that are known to be influenced by environmental toxins. The National Center for Biotechnology Information, a part of the National Library of Medicine at N...

USC, Rice to develop bacteria-powered fuel cells

...s. Shewanella oneidensis, one such bacterium, uses metals instead of oxygen to fully metabolize its food. "Since this organism is capable of passing electrons directly to solid metal oxides, it is not particularly surprising that it can do the same to the anode of the fuel cell, and since we are already in...

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