counting chamber

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Related to counting chamber: hemocytometer


an enclosed space.
Chambers of the eye. From Dorland's, 2000.
anterior chamber the part of the aqueous humor-containing space of the eyeball between the cornea and iris.
counting chamber the part of a hemacytometer consisting of a microscopic slide with a depression whose base is marked in grids, and into which a measured volume of a sample of blood or bacterial culture is placed and covered with a cover glass. The number of cells and formed blood elements in the squares is counted under a microscope and used as a representative sample for calculating the unit volume.
drip chamber the expanded portion of intravenous tubing into which fluid falls, where the rate of flow can be monitored if necessary. See also intravenous infusion.
hyperbaric chamber an enclosed space in which gas (oxygen) can be raised to greater than atmospheric pressure; see also hyperbaric oxygenation.
ionization chamber an enclosure containing two or more electrodes between which an electric current may be passed when the enclosed gas is ionized by radiation; used for determining the intensity of x-rays and other rays.
posterior chamber that part of the aqueous humor–containing space of the eyeball between the iris and the lens.
vitreous chamber the vitreous humor–containing space in the eyeball, bounded anteriorly by the lens and ciliary body and posteriorly by the posterior wall of the eyeball.

counting chamber

a device for counting microscopic objects suspended in fluid, as cells and platelets in dilute whole blood or bacteria in broth culture. It consists of a microscope slide containing a shallow cavity of uniform depth the floor of which is ruled with a grid and which, when closed with a cover glass, holds a precise volume of fluid. A calculation based on the number of objects counted within the grid lines, the dilution of the fluid, and the volume of the counting chamber yields an estimate of the concentration of objects in the fluid before dilution.
See also: hemocytometer.

count·ing cham·ber

(kown'ting chām'bĕr)
A standardized ruled-glass slide used for counting cells (especially erythrocytes and leukocytes) and other particulate material in a measured volume of fluid. Such slides are frequently known as hemocytometers.
References in periodicals archive ?
Comparison between estimated sperm count and Neubauer counting chamber recordings Group 1, estimated count Group 2, estimated count < 40 sperm (N=14) 40-100 sperm (N=14) Estimated Neubauer count, Estimated Neubauer count, count x [10.
6]/L, no correlation in the relevant erythrocyte range could be determined between the CD and the UF as well as between the CD and the counting chamber.
The frozen aliquots allow the controls to be analyzed in a counting chamber, but due to the variation in sperm-cell death during thawing, the motility of frozen-thawed sperm is highly variable.
The better choice is to use counting chambers designed specifically for sperm counting and to choose one that is disposable.
When I first joined the laboratory service, we were still using, for some purposes, counting chambers where we diluted whole blood in a special solution, and actually counted the blood cells by eye, using a microscope and a tally counter.
Contract notice: Purchase of a suite of alpha spectrometers comprising in total 72 counting chambers with detectors for the radiotoxicology laboratory of the medical service of Ispra, supply of consumables and omnium maintenance.
Disposable counting chambers, streamlined SOP's, decision tools for morphology--these are a few examples of how simple changes can reduce testing time while significantly improving quality.
Peg started in the field when all chemistry testing was done in test tubes, and white cell counts were done with WBC pipettes, spit strings, and counting chambers.
It is the project management of the extension works, strengthening and renewal of networks and structures for distribution of drinking water, equipment and various facilities, as part of planned operations annually by Vendee Water, either - Supply and installation of drinking water pipes of all sizes and materials,- Realization of individual connections,- Development of counting chambers and pressure stabilizers,- Construction and completion of chlorination and booster stations stations, as well as small equipment and various facilities.