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Videos de Conceptos Relacionados

Diffusion01:12

Diffusion

Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances, such as molecules or ions, diffuse from an area of high concentration to an area of low concentration in the cytosol or across membranes. Eventually, the concentration will even out, with the substance moving randomly but causing no net change in concentration. Such a state is called dynamic equilibrium, which is essential for maintaining overall...
Gene Flow02:39

Gene Flow

Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
Dynamic Equilibrium02:20

Dynamic Equilibrium

A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
Diffusion01:21

Diffusion

Diffusion is a type of passive transport. In passive transport, a substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space. For example, take the diffusion of substances through the air. When someone opens a perfume bottle in a room filled with people, the perfume is at its highest concentration in the bottle and is at its lowest at the edges of the room. The perfume vapor will diffuse, or spread away, from the...
Ion Exchange01:17

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...
Transport Number01:31

Transport Number

The transport number is the fraction of the total current carried by an ion in an electrolyte solution. It is defined as the ratio of the current carried by a specific ion to the total current flowing through the solution. The transport number, t, is central to understanding ionic mobility, which describes how fast an ion moves under the influence of an electric field. This link connects the physical behavior of ions in solution to the chemical processes that occur during electrochemical...

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Updated: Jun 30, 2026

Quantifying Mixing using Magnetic Resonance Imaging
07:33

Quantifying Mixing using Magnetic Resonance Imaging

Published on: January 25, 2012

Mezcla y dinámica del flujo de salida del Mediterráneo.

J F Price, M O Baringer, R G Lueck

    Science (New York, N.Y.)
    |February 26, 1993
    PubMed
    Resumen
    Este resumen es generado por máquina.

    El flujo de salida del Mar Mediterráneo se vuelve turbulento y se mezcla con el agua del Atlántico Norte, formando finalmente una masa de agua significativa en la termoclina. Este proceso oceanográfico da forma a las corrientes de aguas profundas y a la formación de masas de agua en la región.

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    Área de la Ciencia:

    • Oceanografía La oceanografía es la oceanografía.
    • Dinámica de fluidos La dinámica de fluidos.
    • La geofísica es la geofísica.

    Sus antecedentes:

    • El mar Mediterráneo genera un flujo de salida denso y salado.
    • Esta salida es un componente clave de la circulación del Océano Atlántico.

    Objetivo del estudio:

    • Investigar la modificación y el comportamiento del flujo de salida del Mediterráneo.
    • Para entender su transformación a medida que entra en el Atlántico.

    Principales métodos:

    • Análisis observacional de la dinámica actual.
    • Estudio de los procesos de arrastre y mezcla.
    • Evaluación del equilibrio geostrófico y la flotabilidad.

    Principales resultados:

    • El flujo de salida se acelera, se vuelve muy turbulento y se mezcla con el agua central del Atlántico Norte.
    • El transporte de volumen se duplica y la anomalía de densidad se reduce a la mitad debido al arrastre.
    • La fuerza de Coriolis redirige la corriente, lo que lleva al equilibrio geostrófico.

    Conclusiones:

    • El flujo de salida mediterráneo mezclado desciende por la ladera continental.
    • Finalmente alcanza flotabilidad neutral dentro de la termoclina.
    • Esta masa de agua transformada juega un papel crucial en los procesos oceanográficos.