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Osmium

osmium

(Science: chemistry) A rare metallic element of the platinum group, found native as an alloy in platinum ore, and in iridosmine. It is a hard, infusible, bluish or grayish white metal, and the heaviest substance known. Its tetroxide is used in histological experiments to stain tissues. Symbol Os. Atomic weight 191.1. Specific gravity 22.477.

Origin: Gr. A smell, odour, akin to to smell. So named in allusion to the strong chlorinelike odour of osmic tetroxide. See Odour.


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The Fiber Disease

... amperometric enzyme biosensor for direct measurement of glutamate in vivo. His design incorporates glutamate oxidase, horseradish peroxidase, an osmium-polymer complex together with a nafion coat resulting in a sensor that is uniquely selective for glutamate, and that provides TTX-sensitive signals ...

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by London
Fri Jan 12, 2007 7:45 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5560785

The Fiber Disease

... nasal polyp from a patient with rhinosporidiosis was removed from the block, dewaxed with xylene, rehydrated with ethanol, post-stained with 1.5% osmium tetroxide, then dehydrated with ethanol, transferred to propylene oxide followed by Epon 12 resin, heat-catalyzed at 65°C, and ultrasectioned ...

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by al
Mon Dec 25, 2006 1:39 am
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5560785

Viruses..... yet again

... (gold which stop sthe elctrons is the equivqlent of a fluorescent dye in photonic microscopy). To acatually stain them you would use a solution of osmium oxide if I remember correctly (although I am not 100% sure). So do not worry for your watch... unless you want to buy an electron microscope, ...

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by canalon
Tue May 24, 2005 8:31 pm
 
Forum: Microbiology
Topic: Viruses..... yet again
Replies: 8
Views: 4635


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