Screening, of adsorbed

One of the characteristics of the LSPR biosensor is its generality. This is a powerful attribute for fast, high throughput screening of adsorbates. (Adapted from Haes, 2003)... 

Stroscio, J. A., Feenstra, R. M., and Fein, A. P. (1987). Local density and long-range screening of adsorbed oxygen atoms on the GaAs(llO) surface. Phys. Rev. Lett. 58, 1668-1671. 

Stepanek, F., Kubicek, M., Marek, M., and Adler, P. M., Computer-Aided Screening of Adsorbents and Porous Catalyst Carriers, in European Symposium on Computer Aided Process Engineering - 10 (S. Pierucci Ed.), pp. 667-672. Elsevier Science, Amsterdam (2000). Stepanek, F., Marek, M., and Adler, P. M. AIChE J. 45, 1901-1912 (1999). 

Fig. 2. Schematic diagram of a suspended colloidal particle, showing relative locations of the Stem layer (thickness, 5) that consists of adsorbed ions and the Gouy-Chapman layer (1 /k) which dissipates the excess charge, not screened by the Stem layer, to 2ero ia the bulk solution (108). In the absence of a...

Many inorganic oxides can be manufactured to provide granular, porous materials with high surface areas, which can readily adsorb organic liquids. Preliminary screening of a range of oxides, namely aluminium oxides, titanium dioxides, zinc oxide, hydrotalcites, zeolites and silicas, indicated that the latter two materials were able to retain the largest quantities of biocide. 

Tsuchiyama, Y., Yamamoto, K.-I.,Asou,T.e/al. (1991) A novel process of cyclodextrinproduction by useof specific adsorbents. Part I. Screening of specific adsorbents. Journal of Fermentation and Bioengineering, 71, 407—112. 

There are two types of support systems used for fixed beds of adsorbent. The first is a progressive series of grid- and screen-layers. In this system, each higher layer screen has successively smaller openings,... 

Rippen, G., Ilgenstein, M., Klopffer, W., Poreniski, H.J. (1982) Screening of the adsorption behavior of new chemicals natural soils and model adsorbents. Ecotox. Environ. Saf. 6, 236-245. 

One must account for the screening of the external field by the electronic polarization of the adsorbed molecules. This screening gives rise to a reduced infrared absorption. Taking it into account in a proper way shows... 

C5 cyclization requires stricter geometric conditions than aromatization. This is in favor of the dual-site mechanism of C5 cyclic reactions (25). All metals catalyzing it have an fee lattice, and their atomic diameter lies between 0.269 and 0.277 nm. These two criteria must be fulfilled simultaneously. With such a distance between the two sites, the screening of the C—C bond adjacent to the preferably adsorbed tertiary C atom becomes evident. Figure... 

If hydrogen occupies all sites, the dual-site mechanism may operate over two adjacent /2g sites 42). The importance of active site periodicity and the screening of the adjacent C—C bond is valid in this case, too. This (assumedly adsorbed) hydrogen does not participate in C5 cyclic reactions. There is some indication, however, that it might be mobilized for cyclobutane ring opening 97, 97a). 

Selectivity is a relative term and is defined in the Molex process as the adsorbent s preference for desired component (in this case, normal paraffins) over the undesired feed components (cyclic paraffins, iso-paraffins, aromatics) while employing a particular desorbent. One can easily determine an adsorbent and desorbent combination selectivity using a pulse test screening apparatus. This apparatus consists of a known volume of adsorbent placed in a fixed bed. A stream of desorbent is then passed over the bed to fill the pore and interstitial volume of the bed. A known quantity of feed is introduced to the feed at the top of the adsorbent bed and passed across the column as a pulse of feed. This pulse of feed is then pushed through the adsorbent bed using a known desorbent flow rate. Effluent from the column is monitored for the various feed components and the concentrations of each component noted (with respect to time) as they elude from the... 

At room temperature ionization seems to occur from definite sites, so that the image produced on the screen is a hydrogen desorption map of the substrate. The sharpness with which this pattern is produced is limited by the lateral momentum of adsorbed hydrogen, that is, by the... 

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