Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Local topography

The topography of a conical intersection affects the propensity for a nonadiabatic transition. Here, we focus on the essential linear tenns. Higher order effects are described in [10]. The local topography can be detennined from Eq. (13). For T] = 3, Eq. (13) becomes, in orthgonal intersection adapted coordinates... [Pg.461]

POOL FIRE A fire involving a flammable liquid spillage onto ground or onto water, or within a storage tank or trench. The pool size depends upon the scale and local topography. Fire engulfment and radiant heat pose the main risks. [Pg.17]

The depth resolution (i.e. the ability to discriminate between atoms in adjacent thin layers) is limited by the primary beam causing redistribution of target atoms prior to their emission as ions, and to segregation and radiation-enhanced diffusion processes. The local topography can also lead to a loss of depth resolution with sputter depth. [Pg.79]

Yarkony DR (2001) Nuclear dynamics near conical intersections in the adiabatic representation. I. The effects of local topography on interstate transition. J Chem Phys 114 2601... [Pg.328]

Surface and groundwater flow within the Canada Creek watershed is SE from the high level of the mill and ARS to the low lying NATA then north through the wetlands (Fig 3). This path is based on local topography, core log data, and hydraulic head values for the confined aquifer. Hydraulic heads show groundwater in the Canada Creek... [Pg.372]

Editor In Chapter 4 of this book we examine the issue of leakage of explosive from mines. We attribute a comment to you about the resulting pattern of dispersal of the explosive molecules on the ground surface. Of course, the details of the local topography have a dominant effect, but you indicated that in nearly flat areas you routinely notice a peculiar pattern. Please address this issue. [Pg.183]

The natural factors cover dispersion conditions, which are influenced by climate and (regional and local) topography, and natural PM10 sources. [Pg.17]

All studies to date that have endeavored to use carbonate or phosphate fossils to infer paleoelevations have focused on stable isotope trends. This principal reliance on isotopes presents potentially serious problems on two fronts—the presumed constancy of isotopic lapse rates, and the required models of the impact of global climate change on local climate, independent of local topography. [Pg.145]

Spatial distribution is mainly attributed to the differences in emission patterns, meteorological conditions and local topography of distinct city functional areas. Many studies have examined the effects of these differences. [Pg.241]

Water table transects portray the surface altitudes (topography) and water table altitudes of wells located along a line as shown in Fig. 4.5c. The transect provides a convenient picture of the local topography, depth of groundwater, spacing of existing wells, and inferred direction of ground-water flow. [Pg.69]

Because it is necessary to provide material for each days landfill and a final layer of cover after the filling has been completed, data on the amounts and characteristics of the soils in the area must be obtained. Local topography will affect the type of landfill operation to be used, equipment requirements, and the extent of work necessary to make the site usable. [Pg.101]

Based on these considerations, four distinct types of peptidomimeticshave been identified to date (9,10). The first invented were structures that contain one or more mimics of the local topography about an amide bond (amide bond isosteres). Strictly speaking, these are properly classified aspseudopeptides (11), but in recent years, they have been called peptidomimetics on occasion. For historical reasons, we classify the peptide backbone mimetics as type I mimetics (Table 15.1). These... [Pg.635]

Figure 1 Illustration of the development of increasingly complex flow systems as topography becomes more complex. Contours of hydraulic head are indicated by dashed lines and groundwater flow lines by solid arrows. Scale is arbitrary, but might correspond to 100 km in the horizontal direction. In (a), smooth topography produces a regional-scale flow system. In (b) and (c) increasing local topography creates a mixture of intermediate and local-scale flow systems superimposed on the regional one (Freeze and Witherspoon, 1967) (reproduced by permission of American Geophysical Union from Water Resour. Res. 1967, 3, 623-634). Figure 1 Illustration of the development of increasingly complex flow systems as topography becomes more complex. Contours of hydraulic head are indicated by dashed lines and groundwater flow lines by solid arrows. Scale is arbitrary, but might correspond to 100 km in the horizontal direction. In (a), smooth topography produces a regional-scale flow system. In (b) and (c) increasing local topography creates a mixture of intermediate and local-scale flow systems superimposed on the regional one (Freeze and Witherspoon, 1967) (reproduced by permission of American Geophysical Union from Water Resour. Res. 1967, 3, 623-634).
A significant rise in the thermostability of bi-cationic sample also gives an indirect evidence of intimate interaction between two components in the zeolitic matrix. The ESR data (Fig. 3) demonstrates a big difference in local topography of isolated Cu " ions in two samples calcined at 750°C. The presence of cobalt additive preserves the sites with the most coordinatively unsaturated square-planar Cu " ions from high-temperature destruction. [Pg.662]

In recent publications there are contradictory points of view on the basis of unusual activity of CuH-ZSM-5 in both total oxidation of hydrocarbons and NO decomposition [3, 6, 8 - 11, 19, 20]. In our earlier work the decisive role of the low-coordinated square-planar Cu cations in alkane oxidation was demonstrated [11, 12, 14]. In our opinion, the results obtained agree well with these data the preservation of high catalytic activity of Co/CuH-ZSM-S/ gQO correlates well with conservation of just these the most unsaturated sites in Co/Cu-ZSM-S/ g. The physical mechanism of the stabilizing influence of cobalt additive on the conservation of Cu local topography in ZSM-5 matrix is unclear now. The migration of cobalt ions into zeolitic channels with formation of some kind of bi-cationic structures can not be excluded. [Pg.662]

There are limitations to estimating cry and atmospheric stability categories further errors may result from applying these models to settings that differ in local topography or climatic conditions. Typically, these models apply to high plumes and downwind distances less than 10 km. [Pg.339]


See other pages where Local topography is mentioned: [Pg.450]    [Pg.450]    [Pg.461]    [Pg.462]    [Pg.2253]    [Pg.350]    [Pg.11]    [Pg.18]    [Pg.139]    [Pg.251]    [Pg.98]    [Pg.557]    [Pg.557]    [Pg.568]    [Pg.569]    [Pg.392]    [Pg.298]    [Pg.441]    [Pg.152]    [Pg.11]    [Pg.121]    [Pg.299]    [Pg.319]    [Pg.361]    [Pg.215]    [Pg.102]    [Pg.57]    [Pg.235]    [Pg.920]    [Pg.289]    [Pg.298]    [Pg.85]   
See also in sourсe #XX -- [ Pg.48 ]




SEARCH



Conical intersections local topography

Topography

© 2024 chempedia.info