Oxygen distribution

Matsumoto, T. and Mochida, I., Oxygen distribution in oxidatively stabilized mesophase pitch fiber, Carbon, 1993,31(1), 143 147. 

Lateral density fluctuations are mostly confined to the adsorbed water layer. The lateral density distributions are conveniently characterized by scatter plots of oxygen coordinates in the surface plane. Fig. 6 shows such scatter plots of water molecules in the first (left) and second layer (right) near the Hg(l 11) surface. Here, a dot is plotted at the oxygen atom position at intervals of 0.1 ps. In the first layer, the oxygen distribution clearly shows the structure of the substrate lattice. In the second layer, the distribution is almost isotropic. In the first layer, the oxygen motion is predominantly oscillatory rather than diffusive. The self-diffusion coefficient in the adsorbate layer is strongly reduced compared to the second or third layer [127]. The data in Fig. 6 are qualitatively similar to those obtained in the group of Berkowitz and coworkers [62,128-130]. These authors compared the structure near Pt(lOO) and Pt(lll) in detail and also noted that the motion of water in the first layer is oscillatory about equilibrium positions and thus characteristic of a solid phase, while the motion in the second layer has more... 

The aforementioned inconsistencies between the paralinear model and actual observations point to the possibility that there is a different mechanism altogether. The common feature of these metals, and their distinction from cerium, is their facility for dissolving oxygen. The relationship between this process and an oxidation rate which changes from parabolic to a linear value was first established by Wallwork and Jenkins from work on the oxidation of titanium. These authors were able to determine the oxygen distribution in the metal phase by microhardness traverses across metallographic sections comparison of the results with the oxidation kinetics showed that the rate became linear when the metal surface reached oxygen... 

Experience has shown that the oxygen distribution in the products of a metallized military explosive favors the formation of the metal oxide. Any remaining oxygen then forms steam with the H of the expl. If any oxygen is still available it forms C02, and any unreacted C atoms then show up as free carbon in the products. (Confinement of the expls favors the formation of C02 and C at the expense of CO). In halogenated expls HX appears to be formed in preference to H20 and H2... 

Figure 4. The solute-oxygen distribution function for a linear chain of cations in water (1 g/cm ) at 298 K, (a) single ion (b) chain of ions. Circles simulation solid lines polymer RISM. (Reproduced with permission from Ref. 8. Copyright 1987 North Holland Press.)...

Kainer R. A functional model of the rat kidney. J Math Biol 1979 7 57-94. Kassissia IG, Goresky CA, Rose CP, Schwab AJ, Simard A, Huet PM, Bach GG. Tracer oxygen distribution is barrier-limited in the cerebral microcirculation. Circ Res 1995 77 1201-11. 

Latch DE, K McNeill (2006) Microheterogeneity of singlet oxygen distributions in irradiated humic acid solutions. Science 311 1743-1747. 

Holst G., Glud R. N., Kuehl M., Klimant I., A micro-optode array for fine-scale measurement of oxygen distribution, Sensor Actuat B-Chem 1997 B38 122, and refs, cited. 

The oxygen from the dual gas regulator module flows directly through two ports into a closed-end manifold in the fuel cell stack to provide optimum oxygen distribution in the cells. All the oxygen that flows into the stack is consumed, except during purge operations. 

Oxygen gas contacts oil film remaining in oxygen distribution system after installation No- pressurized, enclosed R NOAA Worksheet indicates mixing 02 with petroleum lubricating oil may cause fire reaction may cause pressurization... 

Figure 5. Oxygen distribution near Ag(l 11) electrode at (a) -0.23 V and (b)+0.52 V, relative to pzc. Z is the distance from the center of the Ag atoms in the top Ag plane. Unit density corresponds to the density of bulk water. ...

Armstrong W, Cousins D, Armstrong J, Turner DW, Beckett PM. 2000. Oxygen distribution in wetland plant roots and permeability barriers to gas-exchange with the rhizosphere a microelectrode and modelling study with Phragmites australis. Annals of Botany 86 687-703. 

Figure 9 Nitrogen/oxygen distribution in explosive and non-explosive paths in cluttered bags.

A. Franko, C. Koch, D. Boisvert, Distribution of misonidazole adducts in gliosarcoma tumors and spheroids Implications for oxygen distribution. Cancer Res. 52 (1992) 3831-3837. 

Current density. Figure 4.16 shows the current density distribution at the an-ode/electrolyte interface. The current density is not uniform, as it is affected by the hydrogen and oxygen distributions and by the electrolyte resistance which is, in turn, dependent on the temperature. Because of the previously discussed reasons, as emphasized in Figure 4.17 where a 2D representation is shown, the produced current is smaller under the ribs than elsewhere. Furthermore, around the ribs, it is possible to observe that the produced current is characterized by a local increase. This effect is related to the local flow deceleration which, in turn, causes a local increase in the species concentrations together with a greater species diffusion perpendicular to the cell plane. 

Figure 2. SIMS depth profiles of the isotopic oxygen distribution for GaAs. Key to (A) A, anodically oxidized in H,leO , anodically oxidized in H,IS0. Key to (B) , anodically oxidized in H,lsO and A, anodically oxidized in H,laO. (Reproduced, with permission, from Ref. 29. Copyright 1979, Electrochemical Society.)...

Oxygen distribution below the oxycline is characterized by small vertical gradients (or uniform distribution or local maxima). 

Stunzhas PA (2002) Fine structure of vertical oxygen distribution in the Black Sea. In Zatsepin AG, Flint MV (eds) Complex investigation of the northeastern Black Sea. Nauka, Moscow, p 133 (in Russian)... 

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