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Resolution partial selectivity

A number of techniques have been used previously for the study of state-selected ion-molecule reactions. In particular, the use of resonance-enhanced multiphoton ionization (REMPI) [21] and threshold photoelectron photoion coincidence (TPEPICO) [22] has allowed the detailed study of effects of vibrational state selection of ions on reaction cross sections. Neither of these methods, however, are intrinsically capable of complete selection of the rotational states of the molecular ions. The TPEPICO technique or related methods do not have sufficient electron energy resolution to achieve this, while REMPI methods are dependent on the selection rules for angular momentum transfer when a well-selected intermediate rotational state is ionized in the most favorable cases only a partial selection of a few ionic rotational states is achieved [23], There can also be problems in REMPI state-selective experiments with vibrational contamination, because the vibrational selectivity is dependent on a combination of energetic restrictions and Franck-Condon factors. [Pg.669]

Achieve at least Partial Resolution by Selecting Protein CSP Arbitrarily and Using 5ft mM Phosphate or Other Buffers (pH 7.0)... [Pg.241]

Reproducibility between different batches of the sorbent High capacity in terms of dynamic loading in preference to static loading of the desired components) in the feedstock High resolution and selectivity under linear and partial overload chromatographic conditions... [Pg.118]

The above findings show the potentials of germinating rapeseed as a cheap and easy to obfain bioca yst for complete hydrolysis of oils for me preparation of fatty acids and for partial selective hy lysis of oils or selective esterification of fatty acids for the enrichment of definite fatty acids from mixtures via kinetic resolution. [Pg.550]

In the finite-difference appntach, the partial differential equation for the conduction of heat in solids is replaced by a set of algebraic equations of temperature differences between discrete points in the slab. Actually, the wall is divided into a number of individual layers, and for each, the energy conserva-tk>n equation is applied. This leads to a set of linear equations, which are explicitly or implicitly solved. This approach allows the calculation of the time evolution of temperatures in the wall, surface temperatures, and heat fluxes. The temporal and spatial resolution can be selected individually, although the computation time increa.ses linearly for high resolutions. The method easily can be expanded to the two- and three-dimensional cases by dividing the wall into individual elements rather than layers. [Pg.1067]

The key to the resolution of the apparent contradiction becomes evident upon re-examining the initial derivation which proceeds from Fig. 68. Finite, or bounded, molecular species are implied in the expression for the probability of a specific x-mev configuration thus fx — 2x + l unreacted ends in addition to the one selected at random are prescribed. An infinite network, on the other hand, is terminated only partially by unreacted end groups the walls of the macroscopic container place the ultimate limitation on its extent. Hence the network fraction is implicitly excluded from consideration, with the result that the distribution functions given above are oblivious of it. Failure of to retain the same value throughout the range in a is a... [Pg.375]

Parallel (multidimensional) measurements of size- or chemically selected particles permit the simultaneous resolution of biogenic material from fossil sources (14C), discrimination between certain fossil sources and between marine and terrestrial vegetation (13C), and partial separation of agricultural burning sources (K/Fe). The term iMu represents the fraction of modern C based on standard Slk 813C represents the deviation (per mil) of the 13C/12C ratio from standard Sls (2). [Pg.181]

Equilibrium studies have shown that the first formation constant of the chromium(iii)-ethylenediamine system is < 10, over 10 -fold smaller than the value (10 ) previously reported. [Cr(en)3 (tn) ] (x = 0—3 and tn = tri-methylenediamine) complexes have been prepared and resolved using nitro-(-f )D-camphor. These mixed complexes have the same absolute configuration, A, as the pure [Cr(en)3] and [Cr(tn)3] species. Selective intervention of an optically active counterion in the relaxation processes of excited enantiomeric complexes can lead to partial resolution. This has been achieved for [Cr(phen)3] using D-tartrate. ... [Pg.101]


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Resolution selectivity

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