osmium tetroxide


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osmium tetroxide

[′äz·mē·əm te′träk‚sīd]
(inorganic chemistry)
References in periodicals archive ?
The processing time was also reduced by avoiding the osmium tetroxide after fixation for long time (4 hours), only 7 series of ethanol dehydrants, and drying process by using the chemical HMDS only done for 10 minutes.
A US firm offers to deliver its osmium tetroxide in solid form for $30 a gram or $180 (pounds 102) for 10ml in liquid form.
Andy Oppenheimer, a nuclear,biological and chemical weapons expert for Jane's InformationGroup, said osmium tetroxide was an unusual choice of chemical but it could kill.
'The suspects did not manage to acquire any osmium tetroxide, but if they had persisted we believe they would have been supplied from somewhere.
In the blends containing block copolymer, the location of the block cannot be distinguished from the PB homopolymer, because in both cases the PB was stained dark using osmium tetroxide.
White resins, osmium tetroxide, and glutaraldehyde were purchased from Polysciences, Inc.
In order to determine the nature of the latter, two histochemical staining techniques have been used: addition of Sudan IV dye and exposure to osmium tetroxide vapors.
The cells were named after German anatomy professor Friedrich Sigmund Merkel, who experimented with osmium tetroxide staining and described these cells in 1875.
Lungs were fixed either 1 hr or 24 hr after the aerosol inhalation by sequential intravascular perfusion with buffered 2.5% glutaraldehyde (Agar Scientific Ltd., Piano GmbH, Wetzlar, Germany), 1.0% osmium tetroxide (Simec, Zofingen, Switzerland), and 0.5% uranyl acetate (Fluka Chemie GmbH, Sigma-Aldrich, Buchs, Switzerland).
Specimens for SEM were preserved for one hour in 1%-2% osmium tetroxide in filtered seawater, rinsed and stored in distilled water, transferred to alcohol, critical-point-dried, and sputter-coated with carbon or gold (or both); microscopy was conducted at the SEM Laboratory of the National Museum of Natural History, Washington, DC.
Suspects' conversations were eavesdropped on at the GCHQ electronic listening centre and police moved to disrupt the alleged plot at an early stage before any osmium tetroxide was obtained.