ultrafiltration


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ultrafiltration

 [ul″trah-fil-tra´shun]
filtration through filters with minute pores, thus allowing the separation of extremely minute particles. It occurs naturally, as in the filtration of plasma at the capillary membrane, and is also performed clinically and in the laboratory, such as in hemodialysis, where it involves the bulk movement of solute and solvent across the membrane down pressure gradients and is usually performed under pressure to accelerate the process.

ul·tra·fil·tra·tion

(ŭl'tră-fil-trā'shŭn),
Filtration through a semipermeable membrane or any filter that separates colloid solutions from crystalloids or separates particles of different size in a colloid mixture.

ultrafiltration

/ul·tra·fil·tra·tion/ (ul″trah-fil-tra´shun) filtration through a filter capable of removing very minute (ultramicroscopic) particles.

ultrafiltration

[-filtrā′shən]
a type of filtration, sometimes conducted under pressure, through filters with very small pores, such as those used by an artificial kidney. It can separate large molecules from smaller molecules in body fluids.

ul·tra·fil·tra·tion

(ŭl'tră-fil-trā'shŭn)
Filtration through a semipermeable membrane or any filter that separates colloid solutions from crystalloids or separates particles of different size in a colloid mixture.

ultrafiltration

Filtration through a SEMIPERMEABLE MEMBRANE that allows only the passage of small molecules, such as those smaller than protein molecules.

ultrafiltration

the process by which small molecules and ions are separated from larger molecules in blood to form the INTERSTITIAL FLUID or in the kidney to form the renal filtrate.

ultrafiltration 

One of the mechanisms that produce aqueous humour from blood plasma into the ciliary epithelium of the ciliary processes. This mechanism takes advantage of the natural pressure gradient between the capillary vascular pressure and intraocular aqueous pressure, to drive fluid into the eye. Ultrafiltration is one of three physiological processes that create aqueous fluid, the others being active transport and diffusion. See ciliary body; diffusion; active transport aqueous rate of outflow humour.

ultrafiltration

filtration through a filter capable of removing colloidal particles from a dispersion medium, as in the filtration of plasma at the capillary membrane.
References in periodicals archive ?
To identify the fouling mechanism during whey ultrafiltration, the equations of Field, Wu, Howell, and Gupta (1995) (Table 2, Equation 1 through 4) were tested by a nonlinear regression optimization procedure using MATLAB[R] software (version R14).
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inge GmbH, based in Greifenberg, Germany, is a world's leading provider of ultrafiltration technology, a membrane process used to treat drinking water, process water, wastewater and sea water.
I still think there's a role for ultrafiltration in patients who are diuretic unresponsive," added Dr.
The key words hemodialysis, backfiltration, intradialytic hypotension, dialysis, pausing ultrafiltration, and ultrapure dialysate were used.
The Liqui-Flux[R] W10 Ultrafiltration Module uses the proven, 3-layer UltraPES TM capillary membrane for superior permeability and mechanical strength.
Ultrafiltration products--including dialysis systems and components--generally are cleared for marketing as class II devices, supported by technical data, bench studies, and the occasional clinical trial, according to the FDA.
Examination of the cut-off values of these two different membrane processes shows that the value for RO is about 100 Dalton, much lower than that for an ultrafiltration stage.
Inducor tubular modules use the same KMS PVDF ultrafiltration membrane that has been used with FEG tubes and Ultra-Cor modules on thousands of systems for many years.
Volac International Ltd, animal nutrition, feeding supplements, health care and feed ingredients specialists, recently commissioned stainless steel specialists, Axium Process, to build an Ultrafiltration membrane system for the production of cheese whey protein concentrate.
Ultrafiltration is a standard method for separating free [T.
Micro- and ultrafiltration performance specifications based on microbial removal.