Surface chemical features

Fig. 5. Structural superposition of binding sites using Med-Sumo . The Surface Chemical Features (SCF) are used to superimpose the protein binding sites (toppanel).The SCF are represented in color code bar (bottom panel) and the SUMO score measure the quality of the 3D structural superimposition that is calculated using a bit-wise matching algorithm of the color code-bar fingerprint (bottom panel).

Fig.l Structure of silica showing the surface chemical features. Q... 

Some surface chemical features of Pt catalysts supported on AI2O3 and CeOi/AhOs... 

Also the ambient temperature adsorption of H2 will be used for the characterization of the surface chemical features of Pt-containing systems in fact it has been long known that, of the various forms of adsorbed hydrogen, the strongly held one (i.e., the species irreversible at RT) corresponds to a dissociative adsorption, in which there is an H/Pt ratio of 1 1 [10]. The irreversible H2 uptake is thus a suitable tool for the evaluation of the noble metal dispersion. 

Figure 1.11 Representation of the surface chemical features that exist, to a greater or lesser extent, in the graphene layers of flat sp -hybridized carbon materials, including carbene- and carbyne-type free edge sites carboxyl-, lactone-, quinone-, pyrone-, and phenolic-type oxygen functionalities delocalized unpaired n electrons and nondissocia-tively adsorbed O2 on carbene-type sites.

STRUCTURAL, MORPHOLOGICAL AND SURFACE CHEMICAL FEATURES OF AI2O3 CATALYST SUPPORTS STABILIZED WITH Ce02... 

W. W. Emerson, R. D. Bond, and A. R. Dexter, Modification of Soil Structure. Wiley, Chichester, U.K., 1978. The first five chapters of this symposium publication provide details on many aspects of the surface chemical features of soil colloidal stability. 

A system has been constructed which allows combined studies of reaction kinetics and catalyst surface properties. Key elements of the system are a computer-controlled pilot plant with a plug flow reactor coupled In series to a minireactor which Is connected, via a high vacuum sample transfer system, to a surface analysis Instrument equipped with XFS, AES, SAM, and SIMS. When Interesting kinetic data are observed, the reaction Is stopped and the test sample Is transferred from the mlnlreactor to the surface analysis chamber. Unique features and problem areas of this new approach will be discussed. The power of the system will be Illustrated with a study of surface chemical changes of a Cu0/Zn0/Al203 catalyst during activation and methanol synthesis. Metallic Cu was Identified by XFS as the only Cu surface site during methanol synthesis. 

This leads to die third and final main topic, the use of Heff model u-scaling predictions to detect the changes in the resonance structure that occur near chemically important topographic features of a potential surface. Such features include an isomerization saddle point or a sharp bend in the minimum-energy isomerization path. The key feature of this matrix model is... 

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