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 ?
Golden rules and pitfalls in selecting optimum conditions for high-speed counter-current chromatography.
Since injected liquid preferentially wets the medium it gives rise to counter-current imbibition, that is, spontaneous linear flow of wetting fluid into the medium and a counter flow of the resident liquid from the medium.
There is] widespread use of invisible content presences and the emergence of astounding counter-current social and political themes and groups, from the atheist to the homosexuals," he said.
This configuration gives it the ability to handle up to four passes, with hot and cold media flowing through alternating channels in either co-current or true counter-current flow and with very close temperature approaches.
Raffles Dubai's pool includes technology that keeps the pool deck cool for bare feet even in summer, as well as offering two counter-current pools for challenging water workouts and a unique water clock.
In common with other models in the CB range, the CB30 consists of a number of corrugated stainless steel plates stacked on top of each other to form channels for the passage of two liquids, generally in full counter-current flow.
But Tehran will have to navigate a powerful counter-current of Iraqi nationalism that complicates its quest for a friendly, Shi ite-led and preferably U.
Thereafter VGM is directed through the air cooler-condenser (2), where the main condensation of heavy shale oil takes place--separation of liquid and vapour phases in the counter-current process.
The counter-current rotating action of the mixing arms can produce a homogenous batch of refractory sand, conditioned waste dust and other materials in as time as 60 seconds.
Column flotation in mineral processing industries for the concentration of ore is essentially a counter-current bubble column.
While the Irish Republican Army has long served as the face of sectarian anger in Northern Ireland, an equally powerful -- and bloody -- Protestant counter-current has also existed in the province.
In counter-current flow, the droplets and drying air move through the drying chamber in opposite directions.