-Dufour glands of minor workers of Camponotus aegyptiacus contain a mixture of linear and methyl branched hydrocarbons and a trace of dodecyl acetate. Major workers contain a similar mixture of hydrocarbons but also large quantities of dodecyl acetate, some other long chain acetates and traces of propionates and farnesyl acetate. Cataglyphis savignyi has pentadecane as the most abundant compoun...

Non-linear reaction-diffusion processes with cross-diffusion in two-dimensional, anisotropic media are analyzed by means of an implicit, iterative, time-linearized approximate factorization technique as functions of the anisotropy of the heat and species diffusivity tensors, the Soret and Dufour cross-diffusion effects, and five types of boundary conditions. It is shown that anisotropy and cros...

The heat and mass transfer characteristics of natural convection about a horizontal surface embedded in a saturated porous medium subject to variable viscosity are numerically analyzed, by taking into account the diffusion-thermo (Dufour) and thermal-diffusion (Soret) effects. The governing equations of continuity, momentum, energy and concentration are transformed into nonlinear ordinary diffe...

The article considers thermal diffusion shear flows of a viscous incompressible fluid with spatial acceleration. simulation uses system equations (in the Boussinesq approximation), taking into account Dufour effect. This makes it possible to describe gases, for which this effect prevails, from unified standpoint. It is shown that flows, under study nonlinear and overdetermined. In view absence ...

The effect of thermophoresis on heat and mass transfer flow of a micropolar fluid in the presence of Soret and Dufour effects over a stretching sheet is investigated in the present analysis. The transformed conservation equations are solved numerically using an optimized, extensively validated, variational Finite element method. The influence of key non-dimensional parameters, namely, suction p...

Due to their prowess in interspecific competition and ability to catch a wide range of arthropod prey (mostly termites with which they are engaged in an evolutionary arms race), ants are recognized as a good model for studying the chemicals involved in defensive and predatory behaviors. Ants' wide diversity of nesting habits and relationships with plants and prey types implies that these chemic...

The study sought to investigate the influence of a magnetic field on heat and mass transfer by mixed convection from vertical surfaces in the presence of Hall, radiation, Soret thermaldiffusion , and Dufour diffusion-thermo effects. The similarity solutions were obtained using suitable transformations. The similarity ordinary differential equations were then solved by MATLAB routine bvp4c. The ...

4-D comparison method to study the NOy partitioning in summer polar stratosphere – Influence of aerosol burden G. Dufour, S. Payan, F. Lefèvre, M. Eremenko, A. Butz, P. Jeseck, Y. Té, K. Pfeilsticker, and C. Camy-Peyret Laboratoire de Physique Moléculaire et Applications, Université P. et M. Curie, Paris, France Service d’Aéronomie, Institut Pierre-Simon Laplace, Paris, France Institut für Umwe...