Correlations, adsorptivity

Donald F. Othmer and Samuel Josefowitz Correlating Adsorption Data, Industrial and Engineering Chemistry, 40 723 (1948). 

Core hole, 34 210 core-hole lifetime, 34 215 Core level shift, C(ls), 29 13-14 Core-state excitation, 34 204 Correlation data, structure effects, 29 159-160 Correlations, adsorptivity, 29 189-190 Co9Sg, structure, 40 222 CoSiOj powders, Fischer-Tropsch synthesis, 39 288-289... 

The evidence that adsorption has an influence on the luminescence of zinc oxide is not as clear-cut as it is in the case of photoconductivity and conductivity. No experiments have been carried out, to the author s knowledge, directly correlating adsorption to luminescence, such as the work by Ewles and Heap (7) on silica, which showed correlations between its fluorescence and the adsorption of the hydroxyl radical. 

Another correlation often employed to correlate adsorption data for proteins is the Langmuir isotherm,... 

Equation 2 has been used with some success by Bangham (I), McIntosh (5), Yates (20), and others to correlate adsorption extension data. Equation 3 has also been used with considerable success by McIntosh (15) and Dacey (6), and in some of my own work (8, 15). 

The Adsorption potential theory has been used extensively for correlating adsorption equilibria on porous adsorbents. It states that for a given gas-solid system the volume of the adsorbed phase, W, is a function of the adsorption potential, (fr. 

This perspective has examined the approaches to molecular modeling and drug design and emphasized their limitations. The reader should be aware, however, that these tools are daily used on many problems of therapeutic interest with increasing success. This is clearly witnessed by publications of such studies in almost every issue of current major journals. For specific application areas, such as RNA (490, 491), DNA (492-496), membrane (497-507), or peptidomimetic modeling (382, 508-513), the reader is referred to the literature. The prediction of molecular properties, such as log P and correlation between substructures and metabolism, has led to a dramatic increase in efforts to correlate adsorption, distribution (514), metabolism (515-617), and elimination (ADME) with chemical... 

The Dubinin-Radushkevich (DR) equation was originally devised as an empirical expression of the Polanyi adsorption potential theory, and due to its simplicity it has been widely used to correlate adsorption data in many microporous sohds despite its failure in giving the correct Henry constant at extremely low pressures. This equation is based on the premise that adsorption in micropores follows a mechanism of pore filhng rather than the molecular layering and capillary condensation as proposed for mesoporous sofids. It has the form ... 

To describe sofids having a distribution in terms of either energy or pore size, Stoeckli [54] and Huber et al. [55] proposed to use the DR equation as a local isotherm in an integral equation to correlate adsorption isotherm of... 

The use of SECMID to map spatial variations in the adsorption/desorp-tion characteristics of a substrate has not yet been attempted. In principle, however, it should be possible to correlate adsorption/desorption kinetics with surface structural features, using the imaging capabilities of SECM. 

In the same way, Blum et al. [39] have correlated adsorption data of organic compoimds from different sources to MCI n 363 = 0.828). carries information about... 

Like the Sips and Toth equation, the Unilan equation is a three-parameter isotherm equation, and they are commonly used to correlate adsorption equilibrium data of many solids, such as activated carbon and zeolite. 

In the case of high (infinite) spatial correlations, adsorption sites characterized by the same value of adsorption energy are grouped into "patches" that are so large that interaction between molecules adsorbed on different patches can be neglected. The whole adsorption system can then be considered to be a collection of independent subsystems in thermal and material contact. For such patchwise surface topography, the function takes the form [37]... 

When there is strong attractive interaction between the attached R Bi molecules along the chain, they are adsorbed in contiguous sequences. These sequences may induce helical order on the main chain due to the steric hindrance of adjacent adsorbed molecules. The combinatorial factor changes to the number of different ways to select the specified sequences from the finite total length n. Such a correlated adsorption, or cooperative adsorption, was recently studied in detail in relation to helix formation on polymers by adsorption of chiral molecules [27,28] (Section 1.8). Cooperative hydration will be detailed in Section 6.5. 

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