osmium tetroxide

(redirected from Osmium tetraoxide)
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osmium tetroxide

n.
A volatile poisonous pale yellow solid, OsO4, with a pungent smell, used as an oxidizing agent and in solution to stain and fix biological material, especially lipids. Also called osmic acid.

osmium tetroxide

n
(Elements & Compounds) a yellowish poisonous water-soluble crystalline substance with a penetrating odour, used as a reagent and catalyst in organic synthesis. Formula: OsO4
References in periodicals archive ?
Tissues were transferred to a 1% solution of osmium tetraoxide prepared with Millonig's, fixed for 2 hours, and then washed two times with Millonig's.
The samples were then fixed in 1% osmium tetraoxide, and graded in acetone series.
The examined samples were first cut under cryogenic conditions with a Leica Ultracut microtome with a diamond knife to a thickness of about 70 nm and tinted with osmium tetraoxide.
Washing in several changes of buffer for 30 minutes was then followed by post fixation in 1 percent osmium tetraoxide in cacodylate buffer for 4 hours at room temperature.
5 % gluteraldhyde and 200 ul of a 1% osmium tetraoxide each of which was suspended in the sodium/magnesium buffer at pH 7.