i The Soret circular dichroism (CD) spectrum of carbonmonoxy myoglobin dtifers strikingly for the two heme isomers: Aqzl =+90 M-’cm-’ for isomer A, AQ21 = -7 M-’cm-’ for isomer B (Aojula et al., BiochemJ. 250, 853(1988)). This observation implies significant differences in the protein conformation andlor distortions of the heme from planarity between the two isomers. Molecular dynamics simulati...

We have determined the diffusion, thermal diffusion, and Soret coefficients of a poly(dimethyl siloxane)/poly(ethyl-methyl siloxane) (PDMS/PEMS) polymer blend as a function of composition and temperature within the homogeneous phase. The critical slowing down of the diffusion and the corresponding critical divergence of the Soret coefficient are described within the pseudospinodal concept both ...

It is proposed that xanthophylls, and carotenoids in general, may assist in energy transfer from the chlorophyll Soret band to the Q band. Ground-state (1Ag ) and excited-state (1Bu ) optimizations of violaxanthin (Vx) and zeaxanthin (Zx) are performed in an environment mimicking the light-harvesting complex II (LHCII), including the closest chlorophyll b molecule (Chl). Time-dependent density ...

It is common knowledge that light fluids rise while heavy fluids sink in the gravity field. The most obvious case is the isothermal Rayleigh-Taylor instability when a heavy fluid is placed on top of a light one. In the nonisothermal case, while heating from above, the density stratification is stable in a pure liquid. However, unstable density stratification might be established in a binary mix...

The analysis in this communication addresses the unsteady MHD flow of tangent hyperbolic liquid through a vertical plate. model on mass and heat transport is set up with Joule heating, generation, viscous dissipation, thermal radiation, chemical reaction Soret-Dufour form partial differential equations (PDEs). PDEs are simplified into dimensionless by utilizing suitable quantities. solved spect...

Circular dichroism and difference ultraviolet visible spectra were obtained for cobalt hemoglobin derivatives. At 287 nm the ellipticity difference between the oxy- and deoxycobaltohemoglobin is about one-half as great as that for the native proteins indicating smaller quaternary conformational changes for the former. Deoxygenation increases the Soret rotational strengths of both iron and cobal...

The focus of this treatise is on the scrutiny MHD heat and mass transfer motion upper convection Maxwell (UCM) fluid in a thermally radiated flat plate. models flow equations were considered when there temperature difference: Cattaneo-Christov model Soret-Dufour mechanisms. A magnetic field firmness was inflicted opposition to flow. inspection controlled by partial differential (PDEs). Suitable...

The viscoelastic fluids are usually the blends of a polymeric solute and Newtonian solvent. In presence temperature gradient, stratification these solutes can take place via Soret effect. Here, we investigate classical Marangoni instability problem for thin film considering this binary aspect fluid. film, bounded above by deformable free surface, is subjected to heating from below solid substra...

Kinetics of the reaction of peroxynitrite with ferric cytochrome c in the absence and presence of bicarbonate was studied. It was found that the heme iron in ferric cytochrome c does not react directly with peroxynitrite. The rates of the absorbance changes in the Soret region of cytochrome c spectrum caused by peroxynitrite or peroxynitrite/bicarbonate were the same as the rate of spontaneous ...

Marangoni convection is very useful in coating flow technology, surfactant replacement therapy for neonatal children, microfluidics, drying of semi-conductor vapors microelectronics, foams, and film drainage emulsions. The behavior gyrotactic microorganisms chemical reaction on the convected Carreau-Yasuda liquid flowing over Riga plate with thermophoretic particle deposition reported this rese...