filtration

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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)

filtration

/fil·tra·tion/ (fil-tra´shun) passage through a filter or other material that prevents passage of certain molecules, particles, or substances.

filtration

[filtrā′shən]
Etymology: Fr, filtrer, to strain
the addition of sheets of metal to a beam of x-rays for the purpose of altering the energy spectrum and thus the imaging characteristics and penetrating ability of the radiation. Filtration is generally accomplished with aluminum or copper at low to medium energy and with tin, copper, or aluminum at higher energy.

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) .

filtration

(filtrā´shən),
n the use of absorbers for the selective attenuation of radiation of certain wavelengths from a useful primary beam of x-radiation.
filtration, built-in,
n the filtration put into effect by nonremovable absorbers deliberately built into the tube-head assembly to increase the inherent beam filtration.
filtration, external,
n the action of absorbers external to the tube-head assembly, consisting of added filtration plus the attenuating effect of materials of which any closed-end cone such as a pointer cone may be made. See also filter, added.

filtration

passage through a filter or through a material that prevents passage of certain molecules, e.g. capillary wall, blood-brain barrier, radiographic grid.

filtration angle
developmental or acquired distortion of this part of the eye is the common cause of glaucoma. It is the space bounded by the sclera externally, the ciliary muscle posteriorly, the root of the iris medially and the anterior chamber of the eye anteriorly. Within the space is the filtering mechanism, a mass of anastomosing mesodermal spindle cells with many perforations between them.
filtration barrier
the physiological function which limits the passage of small molecules through the renal corpuscle.
glomerular filtration
the process by which glomerular filtrate is formed, involving the balance of pressures across the walls of the glomerular capillaries.
inherent filtration
attenuation of the primary x-ray beam as a result of its passage out of the x-ray tube through the insulating medium and tube window.
filtration membrane
the membrane which stretches across the filtration slits in the renal corpuscle.
filtration pressure
the net driving force which pushes fluid into tissue spaces and out of vascular sites; the net result between capillary osmotic pressure and intravascular hydrostatic pressure.
filtration slits
openings in the glomerular corpuscle which are part of the filtration process in the renal glomerulus.
References in periodicals archive ?
Leyenda: Paulina (46) con su hijo mayor, Andrea, de siete anos, nacido de su matrimonio con Colate, con quien estuvo casada de 2007 a 2012.
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Se dijo que el fallecimiento de su progenitor fue algo muy dificil de superar para la cantante, quien encontro el apoyo en su recien nacido hijo y en su inseparable esposo Colate.