What Is a Titre?

Titer, a term used to express concentration, is commonly used in chemistry, pathology, and immunology. The titer is the reciprocal of the dilution. The virus titer is the concentration of the virus suspension, which is also called the titer of the virus. The number of plaque-forming units or the number of infection centers is the value of pfu.

Titer

Titer is an expression

Chinese name: Titer

English name: titer; titre

Synonym :

1. The so-called virus titer, the concentration of virus suspension, refers to the value of pfu.

2. The titer is

Titer ammonia titer

Titer (Titer, abbreviation tt or Ti) is a commonly used term in solution in nitrogen fertilizer enterprises. It is expressed in units of 1/20 of the substance's concentration (mol / L), which is 1mol / L. Equivalent to 20tt.

Conversion of ammonia titer

1 titer = 1/20 equivalent concentration = 1/20 × 17 grams ammonia / liter = 0.85 grams ammonia / liter

Titer virus titer

That is, the virulence of the virus, or the virulence value, the unit for measuring the virus titer includes the minimum lethal dose (MLD), the minimum infection amount (MID), and the half lethal dose (LD50), among which LD50 is the most commonly used. It refers to the amount of virus that can kill half of the experimental animals in a certain period of time. However, the pathogenic effects of viruses on laboratory animals are not necessarily marked by death. For example, if the incidence of infection is used as an indicator, half the amount of infection (ID50) can be measured. In addition, when the experimental material is chicken embryos, half of the chicken embryos are used. The lethal dose (ELD50) or chicken embryo half infection (EID50) is expressed; when the material of the experiment is a cell, it is expressed by half the tissue infection (TCID50).