Intramolecular interference function

TABLE 8.1 Relations for R, and the Intramolecular Interference Function P(,q,0) for Several Model Structures" (Rayleigh-Gans-Debye Regime)... 

For a homopolymer with a distribution of molecular weights, r (0,c) reduces to wMJM in the limit of infinite dilution and zero scattering angle for >0, the intramolecular interference function P q,c) discussed in the section on static scattering must be included for large enough size to make P(g,c)[Pg.154]

Interest in stratified spheres has been motivated by research on coated nanoparticles. For such a system, with a sphere of radius R of scattering elements of type A, coated by a shell with radius R of scattering elements of type B, PJiq,0) and Pg(g,0) are the intramolecular interference functions for spheres of radius R and R, respectively, Pls rf" (7.0) and via Equations 8.25 and 8.26 are given by [11] ... 

The first term on the right-hand side of Eq. (Al) contains the intramolecular interference function, or particle scattering factor, defined by (4,5)... 

First, second, and third normal stress difference Reynolds number Critical Reynolds number Pressure, injection pressure Scattering intramolecular interference function... 

The autocorrelation function (Fig. 2) shows clearly that a representative chain segment embracing about 5-7 CH2-units should be sufficiently long to describe the intramolecular interference modulation in the WAXS-pattern of a PE-melt completely up to distances of approx. 30 A. 

Consider the homodyne correlation function, which is proportional to /i(q, t) 2 for a dilute system with negligible intramolecular interference. Then for a polydisperse system... 

Thus by analyzing the homodyne correlation function at small times and computing L(t), one may obtain both z and its variance <( D)2>Z. The assumptions that enter into these equations should be recalled before applying them to any set of experimental data (a) no interactions between scatterers (infinite dilution), (b) no intramolecular interference (small scatterers and/or small q), and (c) polarizability per unit mass of a scatterer independent of the molecular mass (cf. Section 8.5). 

Elastically scattered radiation reaching a detector from different scattering centers in a macromolecule will be subject to interference effects, provided the dimensions of the macromolecule are comparable to or larger than the wavelength of the radiation (22). The Debye scattering function P(u) describes the variation, arisir from intramolecular interference effects, of the scattered... 

Figure 1. Activation energy of electron-transfer process as a function of electronic energy gap of a reaction. Er = Eg + Ec is the total reorganization energy where Es is the classical solvent reorganization energy and Ec is the reorganization energy of an intramolecular mode, l

Fig. 1. a) Dots The observed X-ray total interference term, Qix(O), for aqueous sulfuric acid solutions. Solid lines The calculated Intramolecular contribution, b) The obsenred intermolecular total distribution function,... 

Abstract The assembly of the N-terminus heptad repeats of the respiratory syncytial virus (RSV) F protein into a trimeric complex that associates with the C-terminus heptad repeats to form a six-helix bundle is a critical step in the process of vims-host fusion and represents an intramolecular protein-protein interaction. Screening campaigns using replicating virus assays have identified several structurally distinct but mechanistically similar chemotypes that interfere with RSV fusion by disrupting the function of the F protein six-helix bundle. This chapter summarizes structure-activity relationships and mechanistic insights associated with the most prominent RSV fusion inhibitors and the key issues in the development of potential clinical candidates. 

By the Fourier transformation of the scattering intensities, radial distribution functions (RDF) are obtained as sho n in Figure 2. A shoulder-like small peak is detected at r = 1.6 A in the RDF for the solution, which is ascribed to the intramolecular C-C and C-0 interferences of TBA. However, due to the low concentration of TBA, the contribution of the structural correlation between water and TBA molecules to the RDF is very small and smeared. The radial distribution curve shows only water-water(more exactly, oxygen-oxygen) correlation even for the TBA aqueous sulution. ... 

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