Native and reconstituted myoglobin were prepared and their c.d. spectra recorded in the Soret region. Time-dependent changes in dichroism following reconstitution were observed and related to haem orientational disorder. Comparative c.d. studies, in agreement with n.m.r. studies, reveal that the degree and nature of this disorder are species-dependent.

The purpose of this research is to investigate heat and mass transport in a magnetohydrodynamic (MHD) flow non-Newtonian viscoelastic fluid on stretched magnetized surface. investigations involve modelling the governing partial differential equations with respect Cartesian coordinate system. models are then transformed into set coupled ordinary equations. Numerical graphical solutions were obta...

The absorption spectrum of deoxygenated human hemoglobin differs from that of the isolated a! and /3 chains, and the difference has been ascribed to the conformational changes on which depends the cooperative ligand binding. Studies on hybrid-heme hemoglobins, in which one chain contains protoheme and the other chain mesoheme, showed that the prominent peak in the Soret region of the difference...

In this study, the onset of convection in a rotating horizontal porous layer saturated by binary nanofluid was theoretically investigated under influence thermodiffusion and nanoparticles. To study convection, Darcy–Brinkman model employed for medium, thermal Rayleigh number derived analytically using linear stability analysis. Water–ammonia-based silver, copper, alumina, three nanofluids, were...

We have performed gas-phase absorption spectroscopy in the Soret-band region of chlorophyll (Chl) a and b tagged by quaternary ammonium ions together with time-dependent density functional theory (TD-DFT) calculations. This band is the strongest in the visible region of metalloporphyrins and an important reporter on the microenvironment. The cationic charge tags were tetramethylammonium, tetrab...

Soret band lifetimes of the free-base tetraphenylporphine (H(2)TPP) and Cu(ii) tetraphenylporphine (Cu(II)TPP) at 408 nm have been directly measured with femtosecond (fs) resolution using the fluorescence-upconversion technique for the first time, giving tau = 68 +/- 15 and 63 +/- 15 fs, respectively, in benzene solvent.

New stochastic models of thermodiffusion are constructed and their hydrodynamical limits are studied through a first order Chapman-Enskog expansion. These models differ from earlier ones by taking into account all first order contributions proportional to the temperature gradient and, thus, allow for both positive and negative Soret coefficients, in accordance with observations.

This article looks at the Soret and Dufour effects on the magnetohydrodynamic (MHD) peristaltic flow of variable viscosity fluid in a symmetric channel. Analysis is presented in the presence of Ohmic heating. Results for the stream function, temperature and concentration are constructed. The variations of sundry parameters are analyzed.