The alleged plot involved osmium tetroxide, a catalyst used in industry, but there was no indication that the suspected plotters had obtained any of the substance, the BBC said, citing security sources.
32.
The oxidation can be stopped at the vicinal diol rather than full cleavage of the alkene by using milder ( dilute, lower temperature ) KMnO 4 or with osmium tetroxide or other oxidants.
33.
Only two osmium compounds have major applications : osmium tetroxide for staining tissue in electron microscopy and for the oxidation of alkenes in organic synthesis, and the non-volatile osmates for organic oxidation reactions.
34.
Fixation is usually performed by incubation in a solution of a buffered chemical fixative, such as glutaraldehyde, sometimes in combination with formaldehyde and other fixatives, and optionally followed by postfixation with osmium tetroxide.
35.
An alternative to coating for some biological samples is to increase the bulk conductivity of the material by impregnation with osmium using variants of the OTO staining method ( O-osmium tetroxide, T-thiocarbohydrazide, O-osmium ).
36.
Osmium tetroxide is often used as a secondary fixative when samples are prepared for electron microscopy . ( It is not used for light microscopy as it penetrates thick sections of tissue very poorly .)
37.
After oxidation to the volatile oxides, is separated from by precipitation of ( NH 4 ) 3 RuCl 6 with ammonium chloride or by distillation or extraction with organic solvents of the volatile osmium tetroxide.
38.
Oxygen is a weaker oxidant and inherently more likely to form covalent bonds, but it only forms molecules with six metals ( manganese heptoxide, technetium heptoxide, ruthenium tetroxide, osmium tetroxide, plutonium tetroxide, and iridium tetroxide ).
39.
Either way osmium tetroxide ( which has the higest known oxidation state for a transition metal ) is an excellent oxidising agent, and mixed with something like methane, or any alkene or alkane would no doubt burn exceptionally well.
40.
The term is primarily written to be applied to liquids; however, it may be used to describe the process of osmium tetroxide ( OsO 4 ), which can change directly from the solid state to a vapor, without becoming liquid.
