Zone of glow

GP 11] [R 19] By increasing the flow rate, the above-mentioned hot spot can be moved downstream in the flow direction, as is evident from the moving zone of glow [9]. 

In such a magnetic field an annular zone of glow is observed close to the electrode for AC and AF as shown in Figure 2. 

GP 11] [R 19] For an autothermal reactor, i.e. a device with neither internal nor external heat transfer, steep temperature profiles along the flow axis were found [9]. Via an inspection window, glowing of the front zone of the wire reactor was observed, indicating complete conversion within a few mm reaction passages. The... 

However, Kaufman24 considers that oxygen atoms and free hydroxyl cannot be removed from the discharge zone simultaneously. Apparently, Kaufman deduces from the glow of the reaction 0 + NO that oxygen atoms escape from the discharge zone more readily than hydroxyl from the zone of discharge in water vapor. Kaufman believes that the simultaneous presence of OH and O is impossible due to the fast reaction... 

Evidently, the dissolved fullerene molecules in toluene reaching the plasma zone with glowing nickel particles, undergo the crystallization and sublimation processes. These molecules become both nuclei and building material for the formation of carbon nanotubes of small and large diameters (>50 nm) on the surface of metallic spheres 15-30 pm in diameter (Fig. 11), forming the metal-carbon composite. 

Plasma polymerization is initiated via the dissociation of molecules caused by varieties of energetic species in the luminous gas phase as described in Chapter 4. It is important to recognize that the reactive species created in the luminous gas phase are not initiators of plasma polymerization. Some species, e.g., free radicals, could be initiators of some monomers that have specific functional groups under special conditions, e.g., in the off period of pulsed glow discharge and in the nonglow zone of a reactor (remote plasma). In most cases, the reactive species created in luminous gas phase are reactive building blocks of LCVD. 

As shown in the previous paper, the use of a magnetic field leads to an annular zone of intense glow, slightly removed from the electrode and with a mean radius of 4 cm. from the electrode center axis. For this reason plasma polymer was collected on aluminum blanks placed on the electrode center axis and at a radius of 4 cm. These blanks were placed on the electrode and on the aluminum substrate suspended between electrodes. For some of the glow discharges where no magnetic field was used, samples of plasma polymer were collected only on the intersection of the electrode center axis with the electrodes and substrate. 

Figure 1. Schematic of the arrangement of magnets behind an electrode. The annular zone of intense glow shown is obtained in an AF or AC glow discharge as described in the text and illustrated in Figure 2.

Joshua focused on the AV pillar s projection, allowing the hazy laserlight sparkle to form its picture behind his eyes. A planet floated below him, its geography instantly familiar. No real continents or oceans, just winding seas and thousands of medium-sized islands. Patches of glowing red cloud squatted over half of the islands, concentrated mainly in the tropic zones— though on this world tropic was a relative term. 

Glowing combustion n. Burning of a solid material without flame but with emission of light from the zone of burning. 

Fig. 2. Fat staining with Scarlet-red according to Herxheimer, followed by Ehrlich s haematoxylin stain. From the progressive marginal zone of a cerebellar focus. Kz = granulated glia cells with yellow red colored content g = vessel with glowing red colored lipid break-down products. Reproduced from...

For hot surfaces a maximum permissible surface temperature Tmas must be specified, with the help of the minimum ignition temperature of a dust cloud MITC and the minimum ignition temperature of a dust layer MITL (usually 5-mm dust layer = glow temperature), so that the temperature of all surfaces is not exceeded. Independent of the zone the Tmax for dust clouds is % MITC and for dust layers MITL - 75 K. 

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