Titer


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titer

[′tī·tər]
(chemistry)
The concentration in a solution of a dissolved substance as shown by titration.
The least amount or volume needed to give a desired result in titration.
The solidification point of hydrolyzed fatty acids.
(textiles)
The weight per unit length of yarn.
The number of filaments in reeled silk thread.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Titer

 

(in analytical chemistry), the concentration of a solution expressed as the amount (in grams) of a substance dissolved in 1 milliliter (ml) of solution or as the amount of any substance that reacts with 1 ml of the given solution. Accordingly, a distinction is made between the titer for a dissolved substance (for example, the titer of the solution of hydrochloric acid, THCI) and the titer for a substance to be determined (for example, the titer of the solution of hydrochloric acid for sodium hydroxide, THCI/NaOH). The titer is calculated from the formula T = P/V, where T is the titer of the solution in g/ml, P is the weight of the batch in g, and V is the volume of the measuring flask in ml. Solutions with a known titer, called standard solutions, are used in titrimetric analysis.


Titer

 

in immunochemical analysis, the maximum or optimum dilution of antigens, antibodies, or complement at which a positive reaction between antigens and antibodies can be recorded or the reaction of one or both components can be registered against a standard. In some cases, such as complement fixation, the maximum antigen concentration at which sensitized erythrocytes can still be lysed is taken as the antigen titer. Determination of the titer is useful in making a quick estimate of the activity of immune serums.

Three kinds of titration are used in immunochemical analysis. In one method, pipettes are used to add different amounts of the material being titrated to identical volumes of the solvent or for successive transfer of a mixture of the material and solvent to test tubes containing an identical quantity of solvent; in the latter case, equal volumes of the material, solvent, and mixture to be transferred are usually taken, which produces twofold dilutions. The second method is similar, except that capillary tubes are used and the volumes are measured from the number of drops. Glass loops capable of holding strictly standard volumes of liquid are used in automatic titration.

N. A. DORFMAN


Titer

 

(titre), in the textile industry, a number used to rate the thickness of fibers and yarns (chiefly silk). The titer is expressed as the product of the cross-sectional area of a fiber or yarn and the density of its material (or as the ratio of the weight of a fiber or yarn to the length). The titer came into use in the 18th century. A unit known as a legal titer has been used since 1900; it is numerically equivalent to the weight in grams of a yarn 9 km in length. In the USSR the tex replaced the titer in 1956.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
To get a quantitative titer (such as 1:1600), titers need to be sent to laboratories that can do the serial dilutions.
Doing a titer can identify dogs who are "non-responders," which occurs most often with parvo virus.
Bacteriophage storage at 4AdegC is the simplest and most cost-effective way, and there are several records of bacteriophages stored at 4AdegC maintaining their high titer even after 30 years (Ackermann et al., 2004; Weber-Dabrowska et al., 2016).
HI Antibody response of Chicks in Group B inoculated with H7N3 (Avi-flu) vaccine: On day 07 PV, the minimum HI titer of 1:2 and maximum titer of 1:16 was detected in serum samples of two chicks.
There is an ongoing debate among clinicians about the real utility of ASO titer levels.
The highest HI antibody titer was recorded in group F (274.4) and the lowest GMT, HI antibody titer was recorded in group G (19.7).group F (315.2) and the lowest GMT, HI antibody titer was recorded in group G (4.3).On day 42 the GMT, HI antibody titers of groups A, B, C, D, E, F and G were 445.7, 388.0, 512.0, 388.0, 477.7, 588.1 and 0.0, respectively.
Crouch of the State University of New York at Stony Brook and her colleagues recommend that antibody titers should be tested before revaccinating adopted children who have documentation of vaccines that were given in their countries of origin.
In groups A and C there was no significant difference between the RVNA titers of males and females while in group B mean RVNA titer of males was significantly higher than the females.
HI titers to CHIKV and DENV were determined at the Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand.
Intrathoracic infection of mosquitoes with VEEV and incubation for 5 days generates saliva titers comparable to those that occur after oral infection (12).
Serum samples from 32 bats neutralized NiV (median titer 20, range 5-160), samples from 52 bats did not, and samples from 20 bats caused toxic reactions in the cell sheet at dilutions <10 (n = 7), <20 (n = 9), or <40 (n = 4), precluding a definitive test outcome.
MLV and HIV vector titer were measured on 293T, TE67 I, and QT6/ACE2 cells and are presented as infectious units (IU) per milliliter.