Flash discharge

More recently the flash discharge method has been developed. Here the parent compound is introduced into the flash tube, which serves at the same time as the absorption tube. A mild flash obtained by discharging a condenser of about 1 (xF dissociates the parent molecule and thus produces free radicals. 

Guldner, W. G. Determination of oxygen, hydrogen, nitrogen, argon and carbon in thin films by flash discharge lamp. Anal. Chem. 35, 1744 (1963). 

Ozone may be produced in nature in a variety of ways. When water evaporates into the air, particularly when thrown up in the form of spray, traces of ozone are produced, and this accounts for its presence in the fresh sea breeze and in the neighbourhood of waterfalls.8 The refreshing odour after a shower of ram or the passing of a water-cart over the road is probably due to ozone. The gas is also produced by silent electric discharges from thunder-clouds and accompanies the flash discharge of lightning. In 1886 Wurster 9 called attention to the fact that ozone may result from the action of sunlight upon the clouds, and since then the results of numerous researches have pointed to the fact that the bulk of the atmospheric ozone is yielded by the action of... 

The absorption and emission spectra obtained by flash discharge in an SiH4 He=l 50 gas mixture or by similar methods were analysed for bands which could be attributed to Si226 29. The observed levels are involved in triplet-triplet transitions of the type 35TU-X3Z g and 3ng- >3Ilu (Fig. 5). Symmetry-... 

The safety system design is often poor as very few experimental validation with liquefied gases/supercritical fluids have been published until now. We did operate some measurements of flash discharge of liquid/supercritical CO2 from pressure vessels and proposed a simple model for mass flux evaluation [1] these results can be used for safety systems design. 

The dry diazonium salt I was subjected to a flash discharge, and an especially... 

Hydroxyl emission sources have been applied also in shock tube studies of hydroxyl radical reactions " . In this case the required time resolution (see refs. 18, 19) was obtained by using a flash discharge in water vapour. Similar methods have been described in which the Cj Swan bands are excited by a discharge in butane . 

Oxides and Chalcogenides. The crystal structure, electrical and thermal properties, and applications of Zr02 have been reviewed. The absorption spectrum of the HfO molecule produced by flash discharge through HfCl4 has been recorded. An X-ray study of the Zr-S system between 1273 and 1473 K established the presence of the stoicheiometric phases ZrSj and ZrSj and a non-stoicheiometric phase y-... 

The history of amino acids begins four billion years ago. The Earths atmosphere then consisted of water vapour, carbon dioxide, nitrogen, carbon monoxide, hydrogen, methane and ammonia. It was hot, and for millions of years lightning flashes discharged across the sky (Fig. 4.1). Under these conditions initially aldehydes and hydrogen cyanide originated, and therefrom amino adds were produced (by Strecker reaction). 

Magnesium exhibits reverse solubility at very high temperatures and may precipitate in the PAL autoclave as kieserite [24]. A tolerable level seems to be around 20 g/L in flash discharge, although this may be conservative. 

Commercial grade propane was utilized for both the jet fire fuel and tank contents. Vessel fills of 20, 41, 60, and 85 volume percent were examined under jet fire attack of the ignited flashing discharge of subcooled liquid propane at about 0.9 MPa. 

Experimental information is limited to H2C=Si , whose electronic absorption spectrum was observed by Leclercq and Dubois in 1979 as a well resolved band system between 3400 and 3100 A following a flash discharge through CHsSiHs . For the 82 excited state, an HCH bending frequency of 1110 cm and a Si—C stretching frequency of 700 cm were deduced from the vibrational analysis. The rotational analysis was in accord with C2v symmetry for the molecule and a Ai singlet ground state. 

DEERS Klein (1986) two-phase flashing discharges (JAYCOR Inc.) SAFIRE (AIChE, New York)... 

From the analysis of bands observed in absorption in a flash discharge [2]. No error limits were qnoted. 

Flash discharge is triggered by a signal from the rotary encoder attached to the ball shaft, so that all measurements are carried out at the same ball position. Another encoder is fastened to the shaft connected to the glass disc. It ensures that all images are captured at the position where the spacer layer thickness was measured beforehand. 

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