Sentences with word «arsenate»

«What this means is that wherever we find arsenite, we can expect to find microbes with arsenate reductase genes and vice versa.»

Of interest are the bacteria species equipped with arsenate reductase genes.

Among 60 birds found dead under fruit trees that had been sprayed with lead arsenate, «Traces of lead and arsenic were found in two only,» Forbush wrote.

«We are looking for arsenate in the metabolites, as well as the assembled RNA and DNA, and expect others may be doing the same.

Look for wood that has not been treated with a chemical called CCA, or chromate copper arsenate, because it's known to cause health issues.

Industry has also discovered that wasabi makes excellent non-fouling marine paint and even a wood preservative that replaces poisonous arsenates.

They claimed that the bacterium, GFAJ - 1, survived not on phosphate (essential to all known organisms) but on arsenate, a toxic arsenic compound.

Subsequent diffraction analysis revealed that the mineral, crystalline arsenic, was in fact calcium arsenate.

To create arsenic - catching chemicals, the Sandia developers first selected mineral families known to attract negatively charged atom groups, or anions, such as the arsenic - containing compound arsenate.

Not only would the organism's DNA have to stay together in spite of the weaker bonds, says Benner, but so would all the molecules required to draw arsenate from the environment and build it into the genetic material.

Some researchers suggest that the authors» own data hint at an organism that is simply absorbing and isolating arsenate while making use of the trace phosphates in its environment.

Heavy metals can leach from wooden fences treated with copper chromium arsenate and from lead paint on houses.

Mirza said the new primer successfully amplified the reductase genes and made it possible for his team to see a broad diversity of arsenate - reducing microorganisms.

Additionally, we live in an area that was once covered with citrus groves where lead arsenate may have been used as a pesticide.

One calculation in the paper showed that the DNA in arsenate - grown cells actually contained 26 times more phosphorus than arsenic.

Based on the new data, «it's very clear there is no arsenate associated in the DNA backbones.»

Bottom: Rice is particularly prone to accumulating arsenic because it confuses two forms of inorganic arsenic — arsenite and arsenate — with silicon and phosphorous compounds that are essential for the plant's structural integrity and health.

The arsenate - grown cells were analyzed in their resting phase, which requires less phosphate for survival than does active growth, notes Joyce, and cells grown in high concentrations of arsenate did not seem to contain any RNA — possibly because RNA production had shut down to conserve phosphate.

The new primer — a short strand of DNA that targets the arsenate reductase gene — helps researchers identify which bacteria in a sample have the genes.

The results showed that 20 percent of the wells surveyed had arsenate and arsenite concentrations above the drinking water limit of 10 micrograms per liter.

Co-authors of the paper, including Paul Davies, an astrobiologist at Arizona State University in Tempe, have countered that the arsenate bonds could be reinforced by specialized molecules, or that arsenic - based life simply has a higher turnover for molecular disintegration and assembly than does conventional life.

The authors explain that various bacteria transform, or reduce, arsenic V — known as arsenate — into arsenic III — known as arsenite.

McLean said a complete picture of the diversity of arsenate - reducing bacteria in a particular environment could lead to improved land use practices and awareness of human activities that may exacerbate the problem.

At the press briefing, Steven Benner, a chemist at the Foundation for Applied Molecular Evolution in Gainesville, Fla., who was invited to the event to offer outside comment, used the analogy of a steel chain with a tinfoil link to illustrate that the arsenate ion said to replace phosphate in the bacterium's DNA forms bonds that are orders of magnitude less stable.

«The copied genes show us which bacteria species are in the sample and tell us new information about the diversity of arsenate - reducing microorganisms.»

Researchers then tested whether the samples containing high arsenite concentrations also had an abundance of the arsenate reductase genetic material.

The beneficial bacteria grab hold of mercury, lead, aluminum, arsenate, and anything else toxic, holding on to them until they're removed through stool.

Soy formula and those containing brown rice syrup had the highest levels of inorganic arsenic and dimethyl - arsenate.

The timber had probably been treated with copper - chrome - arsenate; I wonder what happened to these toxic metals when the board - walk burned?