1, Osmium tetroxide is an expensive reagent with great toxicity.

2, Methods: Ruthenium tetroxide and osmium tetroxide were compared as post fixative in the preparation of hairless epidermis for transmission electron microscopic examination.

3, The oxygen utilization rate is low in manganese tetroxide preparation by metallic manganese powder suspending liquid process.

4, The methods of preparing and measuring of trimanganese tetroxide are introduced in the paper.

5, Even the highly unstable tetrahedral tetroxide XeO4 was made (J. L. Houston, 1964).

6, The design and Structure of nitrogen tetroxide concentration monitor are introduced.

7, Examples of fixatives are formaldehyde, osmium tetroxide, ethanol, and acetic acid.

8, Methods: The soybean oil, tetroxide three lead is used as basic matrix, screening other supplementary material such as petroleum resin, zinc oxide and polyvinyl-chloride.

9, Aerozine 50 was used as the fuel, with nitrogen tetroxide as the oxidizer.

10, The skin biopsy specimen from patient with lamellar ichthyosis was assessed by electron microscopy,[http:///tetroxide.html] using ruthenium tetroxide post-fixation to visualize the intercellular lipid membrane domains.

11, The influencing factors of uncertainty of measurement for determination of equivalent water content in nitrogen tetroxide by NMR method we established were discussed in this paper.

12, This study is significant for enhancing the quality control of the nitrogen tetroxide on launch site.

13, The chiral catalysts employed in the AD reactions are complexes of osmium tetroxide with chiral ligands.

14, To solve this problem, several methods have been introduced for the recovery and reuse of the ligands and osmium tetroxide.

15, Baesd on theoretical analysis and test, the reason that nitrogen tetroxide has been measured in- accurately in red fuming nitric acid as missile propellant is found out.

16, The chiral catalysts employed in the AD and AA reactions are complexes of osmium tetroxide with the chiral ligands.