convection

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current

 [kur´ent]
1. something that flows.
2. specifically, electricity transmitted through a circuit.
alternating current a current that periodically flows in opposite directions; its amplitude fluctuates as a sine wave.
convection current a current caused by movement by convection of warmer fluid into an area of cooler fluid.
direct current a current that flows in one direction only; when modeled as a wave, its amplitude is constant. When used medically it is called galvanic current. This current has distinct and important polarity and marked secondary chemical effects.
galvanic current a steady direct current.
current of injury an electric current that flows between injured myocardium and normal myocardium, because such cells have a reduced membrane potential; it may be either diastolic or systolic.
current of injury, diastolic the current that flows from injured to noninjured tissue during electrical diastole.
current of injury, systolic the current that flows from healthy tissue to injured tissue during electrical systole.
inwardly rectifying current current that rectifies so that it passes more easily towards the interior of a cell.
leakage current the electrical current that exists in the parts or metal case of electrical equipment.
outwardly rectifying current current that rectifies so that it passes more easily towards the exterior of a cell.
potassium rectifying c's transmembrane currents that rectify inwardly or outwardly to make adjustments in cellular functions; they are mainly responsible for the repolarization phase of the action potential. There are at least six mechanisms by which potassium ions move across cardiac cell membranes in the role of rectifier.

con·vec·tion

(kon-vek'shŭn),
Conveyance of heat in liquids or gases by movement of the heated particles, as when the layer of water at the bottom of a heated pot rises or the warm air of a room ascends to the ceiling.
[L. con-veho, pp. -vectus, to carry or bring together]

con·vec·tion

(kŏn-vek'shŭn)
Conveyance of heat in liquids or gases by movement of the heated particles, as when the layer of water at the bottom of a heated pot rises or the warm air of a room ascends to the ceiling.
[L. con-veho, pp. -vectus, to carry or bring together]

convection

the propagation of heat through liquids and gases by the movement of the heated particles, increasing their kinetic energy.
References in periodicals archive ?
i = 1,2,3, and [K.sub.e1], [K.sub.e2], [K.sub.e3] stands for convectional heat exchanging coefficient of the evaporator-collector in solar, dual, and air mode, respectively.
The slope of the linear trends (coefficient a) and standard error of the estimate for the control sample is 1.051 [+ or -] 0.001,1.044 [+ or -] 0.002 for water heated by convectional method, and 1.123 [+ or -] 0.002 for microwave heating.
It can be claimed that the key to further developing the convectional medical imaging modalities, as well as developing entirely new methods, lies in the use of contrast agents.
CPFA consists of a four-pump modular device (Lynda, Bellco[R], Mirandola, Italy) with a plasma filter (0.45 [m.sup.2] polyethersulfone with an approximate cut-off of 800 kDa), a nonselective hydrophobic resin cartridge (140 mL) with a surface of approximately 700 [m.sup.2]/g, and a synthetic, high-permeability hemofilter (1.4 [m.sup.2] polyethersulfone) which allows the application of convectional exchange to the whole blood once it is reconstituted in postdilution [12].
Three inlet and outlet vents were created to allow air convectional current take place.
The data presented here, which is the first of its kind to contrast smooth- and turbulent-flow results for a heavy-duty-vehicle model at such high Reynolds numbers, indicates that convectional thought regarding decreased Reynoldsnumber sensitivity in turbulent winds may need to be revisited.
It is difficult to comprehend free convection in test environments, because unknown temperature distributions and particularly unknown air streams hinder a precise measurement of convectional heat flow.
Despite extensive research on mango slices of various other varieties [11, 14, 15, 16] there is limited information on the impact of convectional air drying on Apple mango cubes and leathers.
Among the different nanostructures, gold nanoparticles, in different modifications, are the most capable candidates for such photothermal (PT) sensitizers because they are the strongest nanoabsorbers; This notion assumes that one uses convectional (i.e., solid spheres), relatively small (e.g., 10-40 nm) gold nanoparticles that can be conjugated with specific to selectively target the bacterium.
The used model for the deformation intensities is suitable for the convectional and the vacuum drying process, respectively.
Nevertheless, these studies only considered convectional EH technologies and the SWIET was not investigated in their work.