Fluctuations of compressible droplets: the role of surface excitations

Zvelindovsky, Andrei; Zatovsky, A.V.

doi:10.1051/jp2:1994151

Cited by 5 publications

(2 citation statements)

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“…The deformation of the external surface of the spherical shell with respect to the equilibrium sphere of the radius R can be represented through the multi pole expansion in spherical harmonics Y 1 m( t?, qJ), [l] The expansion coefficients a 1 m(t) are the dynamical variables that characterize the deformation. The orbital number I changes from 1=2 to ln==TCR.c/d (16) where dis a diameter of the particles constituting the globule, and m=-l, -1+ 1, ... l. The 1=0 mode is excluded by assumption that the volume of the globule is constant. The l= 1 Downloaded by [University of Connecticut] at 17:05 10 October 2014 mode is also excluded since it corresponds to the motion of the center of mass of the globule: it has been shown that such a motion practically does not affect the Mossbauer spectra (17,7,11).…”

Section: The Model: [F!(emal Thennal Motions Of Globular Macromoleculesmentioning

confidence: 99%

Thermal Excitations of Hydrated Macromolecules: The Effects of Hydration on the Mössbauer Absorption and Scattering Spectra

Lisý

Tchesskaya

Zatovsky

1998

Journal of Biomolecular Structure and Dynamics

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The spectra of Rayleigh scattering of Mössbauer radiation (RSMR) and Mössbauer absorption by globular macromolecules are calculated. The dependence of the spectra parameters on hydration is modeled with the account for thermal low-frequency vibrations of the particles constituting the globule. Deformational motions of the macromolecule fragments leading to deviations from its equilibrium spherical shape are considered introducing collective dynamical variables governed by Langevin equations with random sources of external forces. The macromolecule is modeled by a double-layered sphere: a rigid (elastic) core is surrounded by a porous hydration shell filled with fluid. The dynamical properties of the bound water inside the shell are described by the Debye-Brinkman equations. The degree of hydration is introduced by means of a combination of the mass coefficients of the porous shell with fluid and the mass coefficients in the limiting cases when the flow inside the shell is "frozen" and in the case of free flow. The hydration-dependent Lamb-Mössbauer factor and the elastic fraction of the RSMR are calculated and compared with experimental data from the literature.

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Section: The Model: [F!(emal Thennal Motions Of Globular Macromoleculesmentioning

confidence: 99%

Thermal Excitations of Hydrated Macromolecules: The Effects of Hydration on the Mössbauer Absorption and Scattering Spectra

Lisý

Tchesskaya

Zatovsky

1998

Journal of Biomolecular Structure and Dynamics

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“…In a limiting case where the interfacial properties are more important than that of the bulk materials, such as in vesicles and microemulsions, the dynamics of vesicles or droplets are studied mainly through the thermal or hydrodynamic fluctuations. [30][31][32][33][34][35] For systems with interfacial properties and bulk properties of equal importance, although certain correlation between the interfacial rheology and the coalescence stability has been suggested, 27 quantitative effects of interfacial rheology on the dynamics of a single droplet, especially in strong flow field, is still unknown.…”

Section: Introductionmentioning

confidence: 99%