Oxygen prevented

TP-Raman spectroscopy was used to evaluate the thermal stability of titanium oxide nanotubes (Blume, 2001). Titania nanotubes are more stable in oxidizing than in inert atmospheres. Titania nanotubes were transformed into anatase at 250 °C in an inert atmosphere, whereas the nanotube structure remained stable up to a temperature of 400 °C in the presence of air. It was proposed that oxygen prevents segregation of hydroxyl and Ti4+ ions and the ensuing reduction to Ti3+, which would otherwise lead to the generation of a nonstoichio metric anatase phase (Blume, 2001). 

At higher pressures ( 4 mm.) it was observed by Srinivasan that the addition of radical scavengers, such as nitric oxide and oxygen, prevented the formation of all of the 1-butyne and most of the 1,2-butadiene as well. Evidently, the principal source of 1,2-butadiene in this pressure range is reaction (8). The relative density of electrons at the two ends of the CgHg- radical has been discussed from a theoretical standpoint. 

Continuous bleeding of low levels of oxygen prevents anode poisoning from taking place altogether [17], as the CO in the foel feed stream continuously reacts at anode Pt sites with the oxygen added to the fuel feed stream, according to ... 

The secondary accidents mainly include four types, namely gas poisoning, roof caving, the second gas explosion and lack of oxygen. Prevention of gas poisoning and lack of oxygen in particular require more attention for that the number of them account for about 60% of the total number of the secondary accidents and so is the death toll caused by them... 

The physical properties of aldehydes and ketones can be explained by an examination of their structures. First, the lack of a hydrogen on the oxygen prevents the formation of hydrogen bonds between molecules ... 

A non-enzymatic H2O2 sensor based on Prussian Blue (PB], also known as an artificial peroxidase, was accomplished by step-by-step electrodeposition of polyaniline on a glassy carbon electrode (GCE] modified with MWCNTs followed by potentiostatic deposition of PB [42]. By using PB instead of peroxidase, the linear calibration range could be improved and interference due to oxygen prevented. A non-enzymatic H2O2 sensor based on PANI-SWCNT electropolymerized in the ionic liquid (IL]... 

A comparison of pulse radiolysis transient yields and final values of G(—tryptophan) and G(RSH) for trypsin shows that a reconstitution or back reaction occurs, as final yields are low . Oxygen prevented this back reaction. Recent work on ribonuclease shows the same general features as the enzymes mentioned above ,... 

PR R t must be an alkylarylphosphine triarylphosphine complexes are not effective catalysts In non-polarsolvents (e.. benzene) isoprene monomer acetates are produced in polar solvents (e.g. tetrahydrofiiran) isoprene dimer acetates are produced Presence of oxygen prevents Pd - -Pd . 

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