Oxygen as a function

Fig. 6.17. The intensity of emission of singlet oxygen as a function of temperature in freshly ground quartz 1 — grinding in helium atmosphere, chemisorption of O2 at 20 C 2 - same as above + treatment at 280"C 3 sample obtained as stage 2 followed by oxidation at 20 C.

Figure 8. Formation of active oxygen as a function of irradiation time during photolysis (k = 313 nm) of +00+ (2 mol/L) in 2,4-dimethylpentane in the presence of 0>. Additives amine 11 and nitroxide 1...

In Figure 2 we presented the permeability coefficient K of oxygen as a function of the mean gas pressure experimentally obtained for a sample of porous material from acetylene black modified with 35% PTFE. The experimental linear dependence is obtained. The intercept with the abscissa corresponds to the Knudsen term DiK. The value obtained is 2,89.1 O 2 cm2/s. The slope of the straight line is small, so that the ratio K,/ Dik at mean gas pressure 1 atm. is small ( 0.1) which means that the gas flow is predominantly achieved by Knudsen diffusion and the viscous flow is quite negligible. At normal conditions (1 atm, 25°C) the mean free path of the air molecules (X a 100 nm) is greater than the mean pore radii in the hydrophobic material (r 20 nm), so that the condition (X r) for the Knudsen-diffusion mechanism of gas transport is fulfilled. 

Table 2 The reactivity of complexes [M(triphos)(catecholate)J+ (M=Co, Rh, Ir) with molecular oxygen as a function of the catecholate/ semiquinone oxidation potential. I=no reactivity 11= the oxygenated complex regenerates the initial complex in the quinone form by release of superoxide ion III = the oxygenated complex regenerates the initial complex in the quinone form by release of molecular oxygen...

FIGURE 1.6 Calculated stoichiometric flame temperatures of propane and hydrogen in air and oxygen as a function of pressure. 

FIGURE 1.7 The variation of the stoichiometric flame temperature of various fuels in oxygen as a function of pressure in the for log P versus (l/7f), where the initial system temperature is 298 K. 

Figure 5. Density of water oxygens as a function of the distance normal to the water/Pt( 100) surface for various external electric field strengths. The field is directed normal to the interface (T = 300 K).

The reactivity of Au O clusters to oxygen as a function of n was measured by Salisbury and coworkers using time of flight mass spectroscopy. It was found that odd-n (even-n) clusters have negligible (significant) reactivity, which is explained by the fact that the O2 molecule, acting as a one-electron aceptor, binds to anionic gold clusters, which have an unpaired electron. 

FIGURE 12.32 Calculated change in loss rate for odd oxygen as a function of altitude in October 1986 at 43.5°N compared to the predictions for a constant particle concentration typical of winter 1978-1979 levels (adapted from Solomon et al., 1996). 

Figure 4.1. Calculated adsorption energy for atomic oxygen as a function of distance of the atom above the surface for a range of close-packed transition metal surfaces (ordered according to their position in the periodic table). In the box showing results for Ru, the energy per atom in 02 is shown for comparison. Only metals where the minimum in the adsorption energy function is below this value will be able to dissociate 02 exothermally. Adapted from Ref. [4].

Select the degree of the polynomial describing the logarithmic vapor pressure of oxygen as a function of the temperature (see Example 3.9). 

Figure I. Ratio of iron(III) produced to initial oxygen as a function of concentrations of iron(II) and oxygen at pH 8.2...

Fig. 1 Radiative accelerations of Li and oxygen as a function of the mass above the point of interest. When the radiative acceleration on Li is smaller than gravity, so is that on 0. According to these calculations oxygen should sink if Li sinks.

Photoreaction in presence of oxygen as a function of anthracene concentration... 

In the cuprates the phonon modes that modulate the Cu-0 bondlength induce similar charge transfer. It was found10, however, that the direction of the electronic polarization was opposite of the ionic polarization when the cuprates are doped with holes, and the electronic polarization is strongly dependent on the wavevector q. Fig. 1 shows the effective charge of oxygen as a function of q, calculated for the two-band Hubbard model with a frozen phonon,... 

The vacuum microbalance can be applied effectively to the study of the mechanism of combustion of solid fuels. Since the interpretation of the weight change in combustion may involve several reactions unless pure materials are chosen for study, this section will present the results of a systematic study of the rate of oxidation of pure artificial graphite with oxygen as a function of time, temperature, pressure, and pretreatment. 

Figure 3. Variation of contact angle and atomic percent oxygen as a function of time of treatment ((, 15% Ft, no cage (A., A) 3% Ft, aluminum cage (9, O) 15% F, aluminum cage reaction cortditions 3.0 mm, 40 cc/min, 50 W).

Part. 4 Quantitative significance of the dominant rate limiting catalytic steps to the total loss rate of odd oxygen as a function of altitude in the stratosphere. 

Figure 8. SAXS curves for Ca-loaded cellulose char during isothermal activation at 340°C in oxygen as a function of time, fhe total burn-off was 73%.

Figure 2.1. Specific energy output from burning methane with oxygen as a function of the molar ratio of oxidizer to fhel.

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