The recent applications of rotatory dispersion techniques to the study of protein structure have for the most part utilized the effect of protein conformation upon dispersion curves that are associated with ultraviolet absorption bands (l-7). The hemoproteins are unique among biologically important proteins in that they also have chromophores in the visible range of the spectrum. It has been de...

Sparse arrays of permanently attached ultrasonic transducers are capable of quickly interrogating large areas, thereby reducing or eliminating the need for extensive bulk wave testing in plate-like structures. Current imaging methods often ignore dispersion, analyzing received signals by approximating wave propagation with a nominal group velocity. Dispersion compensation can significantly impr...

The axial dispersion coefficient of hexachlorobenzene in supercritical carbon dioxide is investigated in a fixed-bed packed with glass beads. The on-line chromatographic pulse-response experiment is used in order to study the dynamics of a packed column under supercritical conditions. The radial dispersion is assumed negligible because of the packed column geometry. To estimate the axial disper...

In order to generate a data base for the numerical study of dispersion processes in a well defined heterogeneous porous medium, a laboratory tank of 14 m in length, 0.5 m in height and 0.13 m in width has been constructed, which is composed of 81 different elements of exactly known geometry and hydraulic properties. In dispersion experiments using salt as tracer, breakthrough curves are observe...

A general mathematical model for supercritical CO2 adsorption on activated carbon have been developed. Adsorption curves obtained with a laboratory plant (adsorber of 10 mL) have been adjusted with this model and the results have been extrapolated to adjust the breakthrough curves obtained with a pilot plant (adsorber of 1L). The proposed model is general and takes into account equilibrium (ads...

The present investigation deals with the propagation of waves in a micropolar transversely isotropic layer. Secular equations for symmetric and skew-symmetric modes of wave propagation in completely separate terms are derived. The amplitudes of displacements and microrotation were also obtained. Finally, the numerical solution was carried out for aluminium epoxy material and the dispersion curv...

The second order perturbation theory based on the locally projected molecular orbitals is developed. A few test calculations with cc-pVDZ and aug-cc-pVDZ basis sets are carried out for the dimers, (H2O)2 and (HF)2. The charge transfer terms remove the de…ciency of the locally projected self-consistent …eld method for molecular interaction (LP SCF MO MI), and the potential energy curves calculat...

A model-based algorithm is presented that adaptively estimates in situ ultrasonic guided wave system parameters. Dispersion curves, propagation loss, transducer distances, transmitted signal, and mode weighting coefficients are estimated using minimal a priori information and assumptions. The five-part algorithm is scalable to accommodate two or more receivers and one or more propagating modes,...

The present article is devoted to a theoretical study on Love wave vibration in a pre-stressed fluid-saturated anisotropic porous viscoelastic medium embedded over an inhomogeneous isotropic half-space influenced by gravity. The expression of dispersion has been achieved with the help of mathematical tools such as variable separable method and Whittaker’s function’s expansion under certain boun...