filtration

(redirected from filtrations)
Also found in: Dictionary, Thesaurus, Encyclopedia.

filtration

 [fil-tra´shun]
passage through a filter or other material that prevents passage of certain molecules, particles, or substances.

fil·tra·tion

(fil-trā'shŭn),
1. The process of passing a liquid or gas through a filter.
2. In radiology, the process of attenuating and hardening a beam of x- or gamma rays by interposing a filter3 between the radiation source and the object being irradiated; inherent filtration is that which is caused by the apparatus itself, such as the glass of an x-ray tube, without addition of a filter.
Synonym(s): percolation (1)

fil·tra·tion

(fil-trā'shŭn)
1. The process of passing a liquid or gas through a filter.
2. radiology The process of attenuating and hardening a beam of x-rays or gamma rays by interposing a filter (3) between the radiation source and the object being irradiated; inherent filtration is that which is caused by the apparatus itself, such as the glass of an x-ray tube, without addition of a filter.
Synonym(s): percolation (1) .

filtration

The movement of fluid virtually free of large molecules such as proteins, across capillary membranes under the influence of hydrostatic pressure.

fil·tra·tion

(fil-trā'shŭn)
1. Process of passing liquid or gas through a filter.
2. In radiology, process of attenuating and hardening a beam of x- or gamma rays by interposing a filter between radiation source and the object being irradiated.
Synonym(s): percolation (2) .
References in periodicals archive ?
Earlier, while speaking at the inaugural ceremony at F-9 Park, Mayor said that in order to ensure clean drinking water not only new filtration plant are being installed but water samples from the existing ones were collected on regular basis for laboratory examination.
He said that presently there are 39 filtration plants in the city while approval for installation of nine -- two in I-9, two in I-10, three in G-8, two in G-10 and one each in F-7 and F-8--water filtration plants have been given.
The permeameter adapted to carry out filtration tests under non-stationary filtration scheme.
where K--hydraulic conductivity; A--cross-section area of the piezometer, [cm.sup.2]; L--height of the sample, cm; S--cross-section area of the filtration ring, [cm.sup.2]; t--the filtration time, s; [H.sub.1] and [H.sub.2]--hydraulic heads, the upper ([H.sub.1]) and lower ([H.sub.2]) water level in the standpipe measured using the same water head reference, m.
The aim of the geofiltration experiments was to find out the hydraulic conductivity values change in the course of long-term and short-term filtration. Suspending the filtration process and leaving samples in the permeameter in a saturated state for some time, to assess the time influence on the change of the hydraulic conductivity values.
The actual evaporation error is relevant only in cases where the tested clay hydraulic conductivity values are 1000 times less and only at the beginning of the filtration in case the hydraulic head gradients are large.
The first filtration experiments were carried out in the undisturbed structure sample.
The results of natural structure clay show that at the beginning of the filtration at high hydraulic gradient, hydraulic conductivity values are the highest (Figs 3-4).
--the total clay in the water is bound to forming clay particles, because the clay sample has no gravity water filtration, which linearly depends on the hydraulic gradient;
Pall Corporation offers the broadest range of advanced filtration systems and services to help blood centers meet the challenges of implementing routine, high-volume blood filtration.
Pall Corporation is the leader in the rapidly growing filtration, separations and purification industry, with annual sales of over $1.2 billion.
PFA Director General (DG) Noorul Amin Mengal said the results of the test of water filtration plants were alarming.