It dissolves readily in nitric acid, with formation of the hydrate of osmium tetroxide, the so-called ... of a sublimate of the color of red lead. None of these three chlorine compounds are ...

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For conventional electron microscopy, the oocytes were fixed in the presence of 2% PFA and 2.5% GA and stained with osmium tetroxide. After dehydration ... stained with uranyl acetate and lead citrate ...

Thereupon, cells were post-fixed in 2% buffered osmium tetroxide (Carl Roth ... Ultrathin sections were stained with uranyl acetate and lead citrate and examined with a transmission electron ...

The samples were subsequently washed in PBS, post-fixed with 1% osmium tetroxide, dehydrated using a graded ethanol series, and embedded in epoxy resin. Ultrathin sections (70 nm) stained with uranyl ...

Then, samples were post-fixed in 1% osmium tetroxide fixative for 0.5 h at 4°C, washed three times with PBS and dehydrated in an ethanol series, sliced on an ultramicrotome to obtain ultrathin ...

Ancient Greece produced the earliest records of democracy, western philosophy — and, it turns out, lead pollution. Researchers studying sediment cores recovered from mainland Greece and the ...

By Hiroko Tabuchi and Mira Rojanasakul At the height of the Los Angeles County wildfires, atmospheric concentrations of lead, a neurotoxin, reached 100 times average levels even miles from the ...

Further still, another danger has arisen from the wildfires—large amounts of inhalable, airborne lead. The tragedies vividly remind us how lead, a neurotoxin, can still present in communities ...