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How Silver Turns People Blue

Ingesting silver — in antimicrobial health tonics or for extensive medical treatments involving silver — can cause argyria, condition in which the skin turns grayish-blue. Brown researchers have discovered how that happens. The process is similar to developing black-and-white photographs, and it’s not just the silver.

PROVIDENCE, R.I. [Brown University] — Researchers from Brown University have shown for the first time how ingesting too much silver can cause argyria, a rare condition in which patients’ skin turns a striking shade of grayish blue.

“It’s the first conceptual model giving the whole picture of how one develops this condition,” said Robert Hurt, professor of engineering at Brown and part of the research team. “What’s interesting here is that the particles someone ingests aren’t the particles that ultimately cause the disorder.” (more…)

Small Organisms Could Dramatically Impact World’s Climate

EAST LANSING, Mich. — Warmer oceans in the future could significantly alter populations of phytoplankton, tiny organisms that could have a major impact on climate change.

In the current issue of Science Express, Michigan State University researchers show that by the end of the 21st century, warmer oceans will cause populations of these marine microorganisms to thrive near the poles and may shrink in equatorial waters. Since phytoplankton play a key role in the food chain and the world’s cycles of carbon, nitrogen, phosphorous and other elements, a drastic drop could have measurable consequences. (more…)

Ghost Busting

Study examines influence of media messages on perceptions of paranormal investigators’ credibility

The fourth installment of the Paranormal Activity films topped the box office last week. Television channel SyFy’s hit show Ghost Hunters scares up big ratings, and has spawned copycat series on networks ranging from Biography to Animal Planet. (more…)

Analysis of Dinosaur Bone Cells Confirms Ancient Protein Preservation

A team of researchers from North Carolina State University and the Palo Alto Research Center (PARC) has found more evidence for the preservation of ancient dinosaur proteins, including reactivity to antibodies that target specific proteins normally found in bone cells of vertebrates. These results further rule out sample contamination, and help solidify the case for preservation of cells – and possibly DNA – in ancient remains.

Dr. Mary Schweitzer, professor of marine, earth and atmospheric sciences with a joint appointment at the North Carolina Museum of Natural Sciences, first discovered what appeared to be preserved soft tissue in a 67-million-year-old Tyrannosaurus Rex in 2005. Subsequent research revealed similar preservation in an even older (about 80-million-year-old)Brachylophosaurus canadensis. In 2007 and again in 2009, Schweitzer and colleagues used chemical and molecular analyses to confirm that the fibrous material collected from the specimens was collagen. (more…)

Not-So-Permanent Permafrost

MENLO PARK, Calif. — As much as 44 billion tons of nitrogen and 850 billion tons of carbon stored in arctic permafrost, or frozen ground, could be released into the environment as the region begins to thaw over the next century as a result of a warmer planet according to a new study led by the U.S. Geological Survey. This nitrogen and carbon are likely to impact ecosystems, the atmosphere, and water resources including rivers and lakes. For context, this is roughly the amount of carbon stored in the atmosphere today.

The release of carbon and nitrogen in permafrost could exacerbate the warming phenomenon and will impact water systems on land and offshore according to USGS scientists and their domestic and international collaborators. The previously unpublished nitrogen figure is useful for scientists who are making climate predictions with computer climate models, while the carbon estimate is consistent and gives more credence to other scientific studies with similar carbon estimates. (more…)

When she says, ‘It’s not you, it’s me,’ it really might be you, UCLA study suggests

Women with stable but not-so-sexy mates become more distant, critical during periods of high fertility

Long after women have chosen Mr. Stable over Mr. Sexy, they struggle unconsciously with the decision, according to a new study by UCLA researchers who look at subtle changes in behavior during ovulation.

At their most fertile period, these women are less likely to feel close to their mates and more likely to find fault with them than women mated to more sexually desirable men, the research shows. (more…)

For Presidential Candidates, Image May Trump Debate Issues

The wide swings in debate performances by this year’s presidential candidates reflect the fact that in modern campaigns, a candidate’s image is the message, according to linguistic anthropologists who have studied presidential campaigns.

Candidates send important messages to voters through even their smallest gestures, the researchers say. For example, in this year’s first debate, President Barack Obama often looked down at the podium and was criticized for appearing disengaged. In subsequent debates Obama directly addressed his Republican opponent, former Massachusetts Gov. Mitt Romney, and increased the use of a hammering hand gesture sometimes called the “power grip.” (more…)

Mystery of Nematode Pest-Resistant Soybeans Cracked by MU Scientists

Gene related to soybeans’ resistance to nematodes also correlates with human diseases

COLUMBIA, Mo. — For 50 years, the world’s soybean crop has depended on the use of cyst nematode resistant varieties of beans, but no one knew how these plants fought off the nematode pests. Now, the secrets of resistant soybean plants are finally coming to light. (more…)