Synonym
|
Time, duration, time elapsed, age, life expectancy, time difference |
Definition in words
|
A specific moment of time minus another specific moment of time
Note 1: Time is a SI base kind-of-quantity
Note 2: Component B may be a chemical, biological or physiological proces, e.g. coagulation
|
Definition by equation
|
 |
Systematic terms
|
Life span of component B in system 1 |
Result type
|
Rational scale |
- Value sets are positive numerical values
- Algebraic operations are allowed (a=nb; a≠nb)
|
Numerical values from 0-∞ |
Unit
|
s (second is the corresponding base measurement unit), h, d (day or 24 hours), m (month), year(s) etc. |
Non-recommended term
|
Period of time |
Reference
|
- Ferard G, Dybkaer R, Fuentes-Arderiu X. Compendium of Terminology and Nomenclature of Properties in Clinical Laboratory Sciences : Recommendations 2016. 1 ed: Royal Society of Chemistry; 2016. 182 p. Doi:10.1039/9781782622451.
- IUPAC Goldbook homepage. http://goldbook.iupac.org
- BIPM homepage. https://www.bipm.org/en/bipm/tai/
- Lehmann HP, Fuentes-Arderiu X, Bertello L. Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996). Pure and Applied Chemistry. 2009;68(4):957-1000. doi:10.1351/pac199668040957.
|
Laboratory field
|
Example
|
Reproduction and Fertility
|
Generic abbreviated |
NPU18843 Sem—Spermatozoa; life span(after ejaculation) = ? h |
Full result |
NPU18843 Semen—Spermatozoa; life span(after ejaculation) = 2 hour |
Abbreviated result |
NPU18843 Sem—Spermatozoa; life span(after ejaculation) = 2 h |
Written expression |
The life span after ejaculation of Spermatozoa in Mr. Smith’s semen is [2] hour. |
Equation
|
|
Reference
|
|
-
Kind-of-property
-
Nominal kind-of-property
-
Kind-of-quantity
-
Unitary kind-of-quantity
-
Rational unitary kind-of-quantity
Reference
|
- Dybkaer R. Concept system on ‘quantity’: formation and terminology. Accredit Qual Assur. 2013;18(3):253-60.
- Dybkaer R. ISO terminological analysis of the VIM3 concepts ‘quantity’ and ‘kind-of-quantity’. Metrologia. 2010;47(3):127-34.
|
Date |
Term |
Note |
2001-05-22 |
Life span |
Term established |