Light quasielastic

Maeda T. and Fujime S. 1984. Spectrum of light quasielastically scattered form solutions of very long rods at dilute and semidilute regimes. Macrontolecules 17 1157-1167. 

W. Brown, R. Johnsen, P. Stilbs, B. Lindman. Size and shape of nonionic amphiphile (Ci2Eg) micelles in dilute aqueous solutions as derived from quasielastic and intensity of light scattering, sedimentation and pulsed-field-gradient nuclear magnetic resonance self-diffusion data. J Phys Chem 87 4548-4553, 1983. 

In a seminal and seemingly forgotten paper, Burchard et al. " discussed the analysis of various polymer architectures based on integrated light scattering (LS) and quasielastic light scattering (QELS). They considered mono- and polydisperse linear and star-branched polymers with/number of arms ( rays ), and random polycondensates of Af or ABC type (identical or different... 

Suzuki, Y Nishio, I, Quasielastic-Light-Scattering Study of the Movement of Particles in Gels Topological Structure of Pores in Gels, Physical Review B 45, 4614, 1992. 

With the development of new instrumental techniques, much new information on the size and shape of aqueous micelles has become available. The inceptive description of the micelle as a spherical agglomerate of 20-100 monomers, 12-30 in radius (JJ, with a liquid hydrocarbon interior, has been considerably refined in recent years by spectroscopic (e.g. nmr, fluorescence decay, quasielastic light-scattering), hydrodynamic (e.g. viscometry, centrifugation) and classical light-scattering and osmometry studies. From these investigations have developed plausible descriptions of the thermodynamic and kinetic states of micellar micro-environments, as well as an appreciation of the plurality of micelle size and shape. 

Dynamic surface tension has also been measured by quasielastic light scattering (QELS) from interfacial capillary waves [30]. It was shown that QELS gives the same result for the surface tension as the traditional Wilhelmy plate method down to the molecular area of 70 A. QELS has recently utilized in the study of adsorption dynamics of phospholipids on water-1,2-DCE, water-nitrobenzene and water-tetrachloromethane interfaces [31]. This technique is still in its infancy in liquid-liquid systems and its true power is to be shown in the near future. 

Southwick, J. G., Jamieson, A. M., and Blackwell, J., Quasielastic light-scattering studies of xanthan in solution, in Solution Properties of Polysaccharides, Brant, D. A., Ed., ACS Symp Ser., No. 150, American Chemical Society, Washington, D.C., 1981,1-13. 

Quartz powder, sources of, 22 413 Quartz sand, 22 380, 382 Quasielastic light scattering (QELS), 8 715-716... 

NA Mazer, GB Benedeck, MC Carey. Quasielastic light-scattering studies of aqueous biliary lipid systems. Mixed micelles formation in bile salt-lecithin solutions. Biochemistry 19 601-615, 1980. 

One of the most striking features of the scattered spectrum for either neutrons or light in the vicinity of a phase transition is the appearance of a divergent elastic or quasielastic peak centred near zero frequency shift that lies entirely outside the quasiharmonic soft-mode description of the dynamics (Fleury Lyons, 1983). The first observation of a divergence in scattered intensity is due to Yakovlev et ai, (1956), who observed the phenomenon in the a-fi transition of quartz. The scattered intensity increases dramatically, sometimes by a factor of 10000 near and the maximum value of line width of the diverging feature is itself rather small ( 1 cm ). In Fig. 4.7, typical central peaks are shown for the purpose of illustration. 

Figure 4.7 Central peaks (a) scattered neutron specta of KMnF3(Tj = 90 K). (After Shapiro et al, 1974.) (b) quasielastic light scattering of TbV04(Tj 32 K). (After Harley et al., 1980.)...

Raj, T. and Flygare, W. H. 1974. Diffusion studies of bovine serum albumin by quasielastic light scattering. Biochemistry 13, 3336-3340. 

Dynamic processes at thermodynamic equilibrium that occur within a time range from sub-microseconds to seconds can be probed without the imposition of a transient disturbance by optical intensity fluctuation spectroscopy. As such, dynamic light scattering (DLS) [155] measures the fluctuation of quasielastic scattering intensity and fluorescence correlation spectroscopy (FCS) [156-158] measures concentration fluctuations of specific fluorescent molecules... 

Seed Latex The seed latex was prepared as described before (10). It had a solids content of 17.0% and its number average diameter was about 0.045 y as measured by quasielastic laser light scattering (15). 

Chang, K., Litt, M., and Jamieson, A. M., "The Measurement of Latex Particle Size by Quasielastic Laser Light Scatter-ing", J. Poly. Sci.-Phys., to be published. 

Another example is the determination of the interaction of D-propranolol with LUVs of DMPC by FT-IR and quasielastic light scattering (QLS) [62]. The results of the two complementary techniques showed that cationic D-propranolol interacts with DMPC. The FT-IR spectra indicate that the drug is localized at the aqueous interface of the bilayer. Figure 3.15 shows the temperature dependence of the wavenumber of the symmetric CH2 stretching mode of DMPC LUV in the absence and presence of... 

A series of monodisperse PMMA latexes was synthesized and characterized with respect to refractive index, percent solids, and solution density. The particle size of each latex was analyzed by several different instrumental methods. The methods used include DCP, SFFF, HDC, Quasielastic Light Scattering (QELS), TEM, and turbidity. 

Although NMR results provide perhaps the most convincing evidence of the bicontinuous structure of some microemulsions, many other techniques support their existence. These techniques include electrical conductimetry, x-ray and neutron scattering, quasielastic light scattering, and electron... 

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