Results 271 to 280 of about 84,971 (337)

Osmolarity of osmium tetroxide and glutaraldehyde fixatives

The Histochemical Journal, 1972
The evidence available to date for the importance of fixative osmolarity is considered together with some observations on the volume changes of crab axons after fixation by osmium tetroxide and glutaraldehyde. The results obtained are compared with those obtained from crab axons and from amphioxus skin cells which had been processed and examined with ...
Q, Bone, K P, Ryan
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Observations on nucleolar staining with osmium tetroxide

Experientia, 1974
La fijacion con tetroxido de osmio origina una tincion selectiva del nucleolo y citoplasma en celulas meristematicas deAllium cepa. Las observaciones efectuadas indican que esta tincion se basa en la reaccion entre el tetroxido de osmio y estructuras que contienen ribonucleoproteinas.
J C, Stockert, O D, Colman
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Sodium Periodate-Osmium Tetroxide

2012
(NaIO4) [7790-28-5] INaO4 (MW 213.89) InChI = 1S/HIO4.Na/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1 InChIKey = JQWHASGSAFIOCM-UHFFFAOYSA-M (OsO4) [20816-12-0] O4Os (MW 254.20) InChI = 1S/4O.Os InChIKey = VUVGYHUDAICLFK-UHFFFAOYSA-N (oxidizing agent for oxidative cleavage of carbon–carbon double bonds3 to give aldehydes and ...
Andrew G. Wee, Baosheng Liu, Zhendong Jin, Aashay K. Shah   +3 more
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Vacuum ultraviolet spectra of osmium tetroxide and ruthenium tetroxide

The Journal of Chemical Physics, 1974
The gas phase absorption spectra of the compounds OsO4 and RuO4 were measured between 2500 and 1050 Å with a Baird 1−m vacuum monochrometer of 1.0 Å bandwidth. Both tetroxides show many electronic absorption bands in this region with diffuse vibrational structure. No spectra of OsO4 or RuO4 have been previously reported below 2200 Å.
John L. Roebber, Robert N. Wiener, Carol Adam Russell   +2 more
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Addition of Osmium Tetroxide to Dinaphthylethylenes

Nature, 1950
IT has been claimed by Pullman1 that the extent of conjugation of a given substituent with an aromatic ring system is determined by the electron density (index of free valence) at the position of substitution. Using the customary resonance terminology, this conclusion may be illustrated by the fact that for 1-substituted naphthalenes there are seven ...
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Reactions of osmium tetroxide with imidazoles

Inorganica Chimica Acta, 1987
Abstract We have studied the reactions of imidazoles with osmium tetroxide both in the presence and absence of ligands other than imidazoles. The pathway involves: (1) osmium tetroxide-ligand complexation (fast), (2) addition of osmium tetroxide to the 4,5-double bond of the imidazole to form the cyclic osmium(VI) ester (slow), and (3) degradation of
Susan F. Kobs, Edward J. Behrman
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Osmium tetroxide-catalysed oxidation of olefins

Journal of the Chemical Society C: Organic, 1968
A wide range of olefins are oxidised by osmium tetroxide in aqueous alkaline solution and the OsVIII is reduced to OsVI or OsIV. If the pH is kept in the range 8.5–12.5, it is possible to reoxidise the osmium compound to its initial state with oxygen at atmospheric pressure. Under these conditions osmium tetroxide acts as an oxidation catalyst.
J. F. Cairns, H. L. Roberts
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The force field of osmium tetroxide

Spectrochimica Acta Part A: Molecular Spectroscopy, 1970
Abstract Some of the infrared spectrum of 18 O labelled osium tetroxide has been determined. The general valence force field for osmium tetroxide has been determined from the frequencies and Coriolis interaction constants of Os 16 O 4 and Os 18 O 4 . The symmetry force constants have been determined as; F 11 ( A 1 ), 8·85; F 22 ( E ), 0·37; F
C.G. Barraclough, M.M. Sinclair
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Osmium Tetroxide

2021
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Controlled fixation with osmium tetroxide

The Anatomical Record, 1952
R F, BAKER, F W S, MODERN
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