Modified strong collision

The (modified) strong collision assumption allows us to separate this reaction into several steps... 

Alexander and co-workers (Dagdigian, et al., 1993, Nizamov, et al., 2002) have carried out quantum scattering calculations with the inclusion of the isolated-molecule perturbation matrix elements (Kotlar, et al., 1980) for CN A2II (v = 3 and 7) —> X2E+(v = v + 4) transitions in collisions with He and At. In this treatment, it was assumed that the Cax(J) mixing coefficients were not modified by the approach of the rare gas atom. While significant cross sections were found for transitions between unperturbed initial and final levels, the computed cross sections did exhibit enhancements for transitions involving strongly perturbed initial or final levels. 

Unfolding of protein ions in the gas phase was induced by collision activation with argon, and the cross section of unfolded conformation was measured and compared with that of the more compact and stable folded conformation. In another publication, TW-IMS-MS was used to measure cross sections to show that a protein retained its solution conformation of both recombinant and solvent-disrupted versions. TW-IMS-MS was also used to study the speciation of different ions bound to bovine carbonic anhydrase, and the conclusion was that ions that are strongly bound to the enzyme (Zn and Cu+ ) modify its structure more than weakly bound ions. ... 

In medium-sized molecules belonging to the strong-coupling case, the s> state is efficiently coupled to the / manifold even in collision-free conditions. This coupling is not essentially modified in the low-pressure range and pressure effects are essentially due to an efficient collisional broadening of the / states (vibrational relaxation within the / manifold). The prompt... 

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