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Ions Shed Water to Slide into the Perfect Pore

Metal ions refuse to lose for large gaps, but will for a tighter fit

February 2013
Results: To slide into nano-sized openings inside minerals, certain metals shed layers of water, according to the NISE (pronounced "nice") theory, first published in 2011 by Dr. Cristian Schulthess and his colleagues. Recently, scientists at Pacific Northwest National Laboratory worked with Schulthess and his student Dan Ferreira to test the NISE theory. Ferreira traveled to PNNL, where he was assisted by Dr. Eric Walter and Dr. James Amonette in the use of a specialized instrument at EMSL that measures key aspects of a metal's behavior. They compared the reactions of manganese and copper ions with three different-sized pores in zeolite, a common type of mineral. Artwork from this study graced the cover of Clays and Clay Minerals.

BPA Findings Highlighted at AAAS Annual Meeting

Meta-analyses of bisphenol A studies show human exposure is likely to be too low for estrogenic effects

February 2013
A controversial component of plastic bottles and canned food linings that have helped make the world's food supply safer has recently come under attack: bisphenol A. Widely known as BPA, it has the potential to mimic the sex hormone estrogen if blood and tissue levels are high enough. Now, an analysis of almost 150 BPA exposure studies shows that in the general population, people's exposure may be many times too low for BPA to effectively mimic estrogen in the human body.

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