countercurrent


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countercurrent

 [kown´ter-ker″ent]
flowing in an opposite direction.

count·er·cur·rent

(kown'ter-ker'ent),
1. Flowing in an opposite direction.
2. A current flowing in a direction opposite to another current.

countercurrent

/coun·ter·cur·rent/ (-kur″ent) flowing in an opposite direction.

countercurrent

a change in the direction of flow of a fluid. An example is the countercurrent in the ascending branch of a kidney tubule where osmolality undergoes a reversal after a gradual change in sodium chloride concentrations.

countercurrent

flowing in an opposite direction.

countercurrent exchanger
a countercurrent system in which transport between the inflow and the outflow is passive.
countercurrent multiplier
a mechanism that enables a membrane to absorb much more solute than water so that the residual fluid has a lower osmotic pressure. The classical example of this phenomenon is the loop of Henle in the kidney. Called also countercurrent multiplier mechanism or system.
References in periodicals archive ?
As a consequence, wind-induced coastally intensified current reversals, such as the Olympic Peninsula Countercurrent observed in Juan de Fuca Strait (Fig.
Architecture of inner medullary descending and ascending vasa recta: pathways for countercurrent exchange.
The work focused on identifying and quantifying the tocopherol (T) and tocotrienols (T3) by manipulating the pressure and the temperature of the countercurrent (CC) SFE process.
During the warm, positive phase of the PDO, the California Current is weakened and the Countercurrent is strengthened.
The counter-current systems are vertical and horizontal but the "horizontal" or inclined washing are more efficient because of the inherent countercurrent nature of water flow within the process.
Preparative separation of punicalagin from pomegranate husk by high-speed countercurrent chromatography.
ChromaCon AG, in collaboration with MIT, has recently devised a new Continuous Chromatography system called the Multicolumn Countercurrent Solvent Gradient Purification (MCSGP) system, which has opened new avenues for implementing continuous manufacturing for biologics.
In the reservoir, spontaneous imbibition can take place both in cocurrent and countercurrent flowing modes (Bourbiaux and Kalaydjian, 1988; Zhou et al.
Finally, in the last two essays in the collection, we find a note of healthy countercurrent in the Italian political economy to some of the most disturbing trends in world politics and capitalism.
The self-announcing assertiveness he speaks of all but crowds out any countercurrent of nuance.
In the laboratory, I saw students measure conductivity and the clearance of sodium molecules across their constructed semi-permeable membranes within designated periods of time using countercurrent flow.
A lung puncture study using countercurrent immunoelectrophoresis technique (CIE), done among children admitted with severe acute lower respiratory infection (SALRI) at Postgraduate Institute of Medical Education & Research (PGIMER) Chandigarh, found Haemophilus influenzae in 15.