نتایج جستجو برای: dufour effect
تعداد نتایج: 1642155 فیلتر نتایج به سال:
Recently, Dufour et al. (2007) reported the unexpected discovery that a few white dwarfs found in the Sloan Digital Sky Survey had an atmosphere dominated by carbon with little or no trace of hydrogen and helium. Here we present a progress report on these new objects based on new high signal-to-noise follow-up spectroscopic observations obtained at the 6.5m MMT telescope on Mount Hopkins, Arizona.
The diffusive motion of foreign particles dispersed in a premelting solid is analyzed within the framework of irreversible thermodynamics. We determine the mass diffusion coefficient, thermal diffusion coefficient and Soret coefficient of the particles in the dilute limit, and find good agreement with experimental data. In contrast to liquid suspensions, the unique nature of premelting solids a...
Philipp A Greif, Annika Dufour, Nikola P Konstandin, Bianka Ksienzyk, Evelyn Zellmeier, Belay Tizazu, Jutta Sturm, Tobias Benthaus, Tobias Herold, Marjan Yaghmaie, Petra Dörge, Karl-Peter Hopfner, Andreas Hauser, Alexander Graf, Stefan Krebs, Helmut Blum, Purvi M Kakadia, Stephanie Schneider, Eva Hoster, Friederike Schneider, Martin Stanulla, Jan Braess, Maria Cristina Sauerland, Wolfgang E Ber...
In this paper, the unsteady magnetohydrodynamics (MHD) free convection flow of an incompressible and electrically conduction fluid over a stretching surface under the influence of Soret and Dufour effects with thermophresis has been investigated. The governing equations are solved numerically by using implicit finitedifference scheme. The results of skin friction, the Nusselt number and the She...
Utilizando cromatografia gasosa acoplada à espectrometria de massa, descrevemos as diferenças na composição química da secreção da glândula de Dufour de rainhas virgens e fisogástricas de Melipona bicolor. A secreção da glândula de rainhas virgens consiste de hidrocarbonetos, enquanto a das rainhas fisogástricas contém, além de hidrocarbonetos, uma variedade de outros compostos, tais como éster...
The effects of double diffusive natural convection heat and mass transfer along a vertical plate embedded in a power-law fluid saturated Darcy porous medium in the presence of Soret and Dufour effects are studied. The governing partial differential equations are transformed into ordinary differential equations using similarity transformations and then solved numerically. A parametric study of t...
Coquart is with the Faculty of Sports Sciences and Physical Education, University of Rouen, Rouen, France. Dufour and Garcin are with the Faculty of Sports Sciences and Physical Education, University of Lille, Ronchin, France. Groslambert is with the Prevention Innovation and Sport Research Dept., University of Franche-Comté, Besancon, France. Matran is with Lille Academic Hospital, Dept. of Fu...
The Dufour gland of both queens and workers of Meranoplus diversus is very large. The reservoir is lined with flat epithelial cells, which usually contain smooth endoplasmic reticulum but also show the unusual accumulation of electrondense inclusions. Chemically, the gland contains an unusual mixture of long-chain fatty acids and their derivatives, including hydrocarbons, ketones and amines wit...
Jean-Antoine Rioux*, Marie-Claude Durette-Desset, Jean-Louis Albaret, Christiane Bayssade-Dufour, Jimmy Cassone, Irène Landau, Annie Petter, and Roselyne Tchéprakoff 1 Honorary Professor of Parasitology (Montpellier), Former President of the French Society of Parasitology, Faculté de Médecine, Université Montpellier 1, 1 rue de l’École de Médecine, 34000 Montpellier, France 2 Ex-members of ‘‘La...
The distribution of the genus Stenelmis (Elmidae) of the Caucasus is reviewed based on materials collected by the authors and examined specimens stored in accessible collections. One of the two species present in this region, represented by the subspecies Stenelmis consobrina consobrina Dufour, 1835, is recorded for the first time in Krasnodar Krai and possibly in Armenia; Stenelmis puberula Re...
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