Scattering behavior

With respect to the scattering behavior at > 1, the domains of Gaussian conformation and in the opposite case (Q , < 1) the domains of swollen chain conformation are probed. The crossover between both regimes is expected to occur at Q = l/ . 

Rutherford scattering behavior. The Mo intensity corresponds to a loading of 1,2 0. MO15 atoms/cm2. It would be difficult to obtain such an accurate number from any other technique in this concentration range. 

The formation of a compact structure accompanying the complexation of PMMA with PEO and the lower flexibility of the PMMA chain in the complex than that of the PAA chain have been confirmed by viscometry [ 16], membrane contraction [2], and polarized luminescence techniques [3]. In addition, comparison of the dynamic light-scattering behavior of PMAA/PEO and PMAA/PEO" in solution shows that the pyrene label, which acts as a hydrophobic species, allows the labeled PEO to aggregate intermolecularly much faster than unlabeled PEO does [30]. 

Recently, Strazielle et al. (48) observed appreciable preferential adsorption when they examined the light-scattering behavior of PBLG in heptane, cyclohexane, and EDC, each containing an appropriate amount of DCA. As should be expected, no such effect manifested itself in a mixture of DCA and cyclohexanol, which had essentially equal refractive indices. 

Fig. 6.19.(a) Emission of X-rays from an aluminum or magnesium target, and (b) the scattering behavior of diffracted X-rays. (Reprinted with permission from G. A. Somorjai, Chemistry in Two Dimensions Surfaces, Cornell University Press, 1981, Fig. 2.8.)... 

Before turning to the applications of the Debye approximation, we should elaborate more fully on a point that was glossed over. This is the assumption —made at the outset, but explicated in going from Equation (58) to Equation (59) —that the scattering behavior of each scattering element is independent of what happens elsewhere in the particle. The approximation that the phase difference between scattered waves depends only on their location in the particle and is independent of any material property of the particle is valid as long as... 

Fig. 30. Zimm-plot and Kratky-plot of glycogen from edible mussels. Neutron small-angle measurements in deuterated water. The dotted line describes the scattering behavior of the ABC model with ac = aAp, and a branching probability of p = 0.2590,174)...

These functions 0 represent the scattering behavior of a full subtree that emerges from a functional group of a monomer selected at random. For instance ... 

This technique was applied for a description of the scattering behavior of branched fibrils from fibrin in the molecular weight region, where first only a rod growth was observed, up to the point of clotting, i.e. gel formation. Since electron microscopic pictures (EM) showed only single branching points, the AB2-domains appeared to consist of one unit only. This implies... 

The atomic form factor accounts for the internal structure of the different atoms or molecules. It will also be different for X-rays and neutrons, since the former probe the electron distribution of the target, while the latter interact with the nuclei of the atoms. Therefore, the analysis of the positions of the reflexes indicates mainly the lattice constants and angles. The intensity of the reflexes contains mainly information about the atomic configuration within an unit cell (structure factor) and the scattering behavior of the single atoms (form factor). 

Combined elastic and confocal Raman microspectrometry experiments were carried out by Yaroslavsky et al. [10] to investigate the spatially resolved scattering behavior along the visual axis of human donor lenses ranging in age from 20 to 68 years. They explored the relation between local protein content and local intensity of elastically scattered light, and compared their results with protein scattering behavior from a model that assumes... 

The light-scattering behavior of those polysilanes studied indicates that they are slightly extended and stiffened compared with typical polyolefins. One measure of chain flexibility is the characteristic ratio C, which is also shown in the table. The values of C for most polysilanes of about 20 are larger than those for typical hydrocarbon polymers (—10), indicating that the polysilanes are somewhat less flexible than polyolefins. However, poly(diarylsilylene)s are much more rod-like and inflexible, with persistence lengths greater than 100 46... 

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