filtration

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Related to filtration membrane: tubular secretion

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

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 ?
The filtration barrier is mainly composed of endothelial cells, basement membrane and epithelial cells (podocytes), among which podocytes were the most critical for the composition of the filtration membrane and their impairment would lead to the formation of proteinuria.
This research addresses several important challenges limiting the development of graphene water filtration membranes.
A global leader in sulfone polymer and monomer production, technical support and innovation, Solvay serves customers in highly competitive industries, such as aerospace, automotive, consumer products, construction, electrical/electronics, healthcare and filtration membranes.
The market growth of polyarylsulfones is strongest for filtration membranes in technical and healthcare applications especially in Asias emerging markets.
Such parts and materials as filtration membranes could be procured from Japanese companies.