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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

Phenomenon which arises as a result of the build-up of a layer of rejected solute at the membrane surface which impedes solvent flow. The resistance to flow due to this layer thus increases until a point is reached where the rate of diffusion of solute away from the polarization layer equals the rate of deposition. This phenomenon also explains why the solvent flux often becomes invariant with an increasing transmembrane pressure drop. Although solvent flux through a membrane is a hydraulic pressure-activated process and should increase with increasing pressure, a point is reached where the rate of build-up of the solute polarization layer is such that flow is impeded and further increases in pressure have no effect.  2, record 1, English, - concentration%20polarization

Record number: 1, Textual support number: 1 CONT

Concentration is the only important application with regard to initial enzyme recovery. Coarse fractionation is rarely attempted on a large scale, mainly because concentration polarisation ... occurs during ultra-filtration, effectively preventing an adequate separation. Equally, removal of salts and low molecular weight species alone is not the prime consideration, although ultrafiltration is commonly used to this end later in enzyme purification processes.  4, record 1, English, - concentration%20polarization

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Grâce à leurs propriétés plastiques, les supports membranaires peuvent équiper des réacteurs de conceptions technologiques très diverses. Dans certains cas, la membrane constitue une simple barrière physique retenant les macromolécules dans le compartiment réactionnel : c'est le principe des membranes d'ultrafiltration utilisées pour récupérer le biocatalyseur dans les réacteurs agités. [...] Le principal inconvénient de cette technique est le phénomène de "polarisation" qui se traduit par une accumulation des composés de haut poids moléculaire sur la face amont de la membrane et un colmatage des pores.  2, record 1, French, - polarisation

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Data obtained with this geophysical method are necessary for understanding material deposition phenomena and local site geology.  1, record 2, English, - deposition%20phenomenon

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Les informations obtenues par cette méthode géophysique sont nécessaires à la compréhension des phénomènes de déposition des matériaux et de la géologie locale du site.  1, record 2, French, - ph%C3%A9nom%C3%A8ne%20de%20d%C3%A9position

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Because sulfur dioxide is the main precursor of acidity, and because understanding of the atmospheric behaviour of sulfur is most advanced, sulfate and sulfur dioxide, in addition to hydrogen ion, are frequently used as reliable indicators of the acid deposition phenomenon.  1, record 3, English, - precursor%20of%20acidity

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

Because sulfur dioxide is the main precursor of acidity, and because understanding of the atmospheric behaviour of sulfur is most advance, sulfate and sulfur dioxide, in addition to hydrogen ion, are frequently used as reliable indicators of the acid deposition phenomenon.  1, record 4, English, - atmospheric%20behaviour

Record number: 4, Textual support number: 1 OBS

behaviour: Brit. sp. of behavior.  3, record 4, English, - atmospheric%20behaviour

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish