Results 251 to 260 of about 1,809,341 (305)
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Electron Temperature Gradient Turbulence
Physical Review Letters, 2000The first toroidal, gyrokinetic, electromagnetic simulations of small scale plasma turbulence are presented. The turbulence considered is driven by gradients in the electron temperature. It is found that electron temperature gradient (ETG) turbulence can induce experimentally relevant thermal losses in magnetic confinement fusion devices.
Dorland, W. +3 more
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Temperature gradients and prebiological evolution
Cell Biophysics, 1987Thermodiffusive transport of trace elements that play important roles in living organisms, such as molybdenum, nickel, copper, and vanadium, was studied in a nonisothermal biphasic system comprised of a liquid solution and jelly layers. Our intent was to mimic the effects of temperature gradients on prebiological evolution.
F S, Gaeta +4 more
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Microfluidic Temperature Gradient Focusing
Analytical Chemistry, 2002A new technique is described for the concentration and separation of ionic species in solution within microchannels or capillaries. Concentration is achieved by balancing the electrophoretic velocity of an analyte against the bulk flow of solution in the presence of a temperature gradient.
David, Ross, Laurie E, Locascio
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Temperature Gradients in Periodontal Pockets
Journal of Periodontology, 1991This study was undertaken to determine whether there is any correlation of temperature within periodontal pockets with their depths. Pocket temperatures were measured with a thermocouple at 1 mm intervals of depth in 247 pockets, in 20 patients with periodontitis, mesiobucally and mesiopalatally/mesiolingually in relation to 6 standard teeth.
R H, Meyerov +3 more
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Anticonvection with an inclined temperature gradient
Physical Review E, 2002Anticonvection, caused by external heating from above in the presence of heat sources (or sinks) homogeneously distributed on the interface, is investigated in the presence of an imposed horizontal temperature gradient. Numerical finite-difference simulations of the finite-amplitude convective regimes have been performed for the two-layer system of ...
Simanovskii, Ilya +3 more
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Environmental Temperature and the Ocular Temperature Gradient
Archives of Ophthalmology, 1965Introduction Previous studies1,2have indicated the existence of ocular temperature gradients. These were of two primary types; the cantral, anterior-posterior gradient across the globe from cornea to orbit and the peripheral, superior-inferior gradient extending across the anterior chamber mainly created by the lids over-riding the superior and ...
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Scanning Temperature Gradient Focusing
Analytical Chemistry, 2006Temperature gradient focusing (TGF) is a recently developed technique for the simultaneous concentration and electrophoretic separation of ionic analytes in microfluidic channels. One drawback to TGF as it has previously been described is the limited peak capacity; only a small number of analyte peaks (approximately 2-3) can be simultaneously focused ...
Stacey J, Hoebel +6 more
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Temperature gradient osmometer and anomalies in freezing temperatures
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1994We have developed a new device that measures freezing and melting temperatures in nanoliter volume samples and can be used as a "freezing point osmometer" with a resolution many orders of magnitude greater than that of existing freezing point osmometers.
A, Arav, B, Rubinsky
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Sound control by temperature gradients
Applied Physics Letters, 2009This work reports experiments showing that airborne sound propagation can be controlled by temperature gradients. A system of two heated tubes is here used to demonstrate the collimation and focusing of an ultrasonic beam by the refractive index profile created by the temperature gradients existing around the tubes. Numerical simulations supporting the
Jose Sanchez-Dehesa +3 more
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Hot corrosion in a temperature gradient
Materials and Corrosion, 1999Abstract Hot corrosion is the accelerated attack of materials at elevated temperatures that is induced by a thin film of fused salt. Many materials that experience hot corrosion are exposed to high heat fluxes and temperature gradients. The hot corrosion of metals can be described by the dissolution of a protective metal oxide into the ...
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