Results 241 to 250 of about 1,780,646 (296)

Electron Temperature Gradient Turbulence

Physical Review Letters, 2000
The 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., Jenko, F., Kotschenreuther, M., Rogers, B.   +3 more
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Microfluidic Temperature Gradient Focusing

Analytical Chemistry, 2002
A 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
openaire   +2 more sources

Scanning Temperature Gradient Focusing

Analytical Chemistry, 2006
Temperature 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, Karin M, Balss, Barbara J, Jones, Constantin D, Malliaris, Matthew S, Munson, Wyatt N, Vreeland, David, Ross   +6 more
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Temperature gradients and prebiological evolution

Cell Biophysics, 1987
Thermodiffusive 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, U, Bencivenga, P, Canciglia, S, Rossi, D G, Mita   +4 more
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Electron temperature gradient driven turbulence

Physics of Plasmas, 2000
Collisionless electron-temperature-gradient-driven (ETG) turbulence in toroidal geometry is studied via nonlinear numerical simulations. To this aim, two massively parallel, fully gyrokinetic Vlasov codes are used, both including electromagnetic effects.
Jenko, F., Dorland, W., Kotschenreuther, M., Rogers, B.   +3 more
openaire   +2 more sources

Temperature Gradients in Periodontal Pockets

Journal of Periodontology, 1991
This 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, J, Lemmer, P E, Cleaton-Jones, A, Volchansky   +3 more
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Temperature Gradient Focusing

2002
A new gradient focusing method, temperature gradient focusing (TGF), is described. In TGF, a buffer is used with a temperature-dependent ionic strength, so that when a temperature gradient is applied to the system it results in a corresponding electrophoretic velocity gradient.
David Ross, Laurie E. Locascio
openaire   +1 more source

Sound control by temperature gradients

Applied Physics Letters, 2009
This 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, Mitko I. Angelov, Francisco Cervera, Liang-Wu Cai   +3 more
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Temperature gradient osmometer and anomalies in freezing temperatures

American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1994
We 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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