countercurrent flow

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count·er·cur·rent flow

(kownt'ĕr-kŭr'ĕnt flō)
Flow in the opposite direction to slice excitation during magnetic resonance imaging.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Tomiyama, "Prediction of countercurrent flow limitation and its uncertainty in horizontal and slightly inclined pipes," Nuclear Technology, vol.
Hemodialysis (HD) utilizes countercurrent flow to achieve extracorporeal removal of waste products from blood, including urea, creatinine, and free water, when the kidneys are in a state of failure (10).
The product from the reactor was de-ashed through a set of de-ashing vessels in which the hydrocarbon stream was contacted in countercurrent flow with water.
Furthermore, AF2B reactor effluent flowed into the O3 reactor at the flow rate of 0.2 L/min and flowing in the countercurrent flow with the flow of ozone and then in the influent - effluent of O3 reactor was measured pollutant concentration order to obtain data as Fig.
Countercurrent flow is used by most of the freshwater fishes to increase the uptake of oxygen.
In countercurrent flow, the water and oil flow through the same face in opposite direction.
With the usual countercurrent flow of dialysate, the hydrostatic, osmotic, and oncotic pressure in the proximal end of the dialyzer draws the substances from the blood to the dialysate.
This asymmetry arises at [tau] = 5.0 during the onset of the countercurrent flow at the vent.
Because the BMLC is located at a faunal boundary, vicissitudes in the CCS greatly affect the species composition and relative abundance of the local ichthyofauna, with temperate species becoming more pronounced in times of strong California Current flow or upwelling and less common during strong Countercurrent flow or during ENSO warming events (Torres-Orozco and Castro-Aguirre 1992; Castro-Aguirre and Torres-Orozco 1993; Gutierrez-Sanchez 1997).
The bloodstream returning to the heart is cooled by the countercurrent flow of saline solution in the balloon catheter.
Cooling towers readily generate fine water droplets, as they operate by spraying water onto a packing material through which there is a countercurrent flow of air.