Entitic number (entitic num.) - Dynamic NPU Manual

Entitic number (entitic num.)

Synonym

Number per entity

Abbreviation

Entitic num.

Definition in words

Number of component B divided by number of entities (system 1) in system 2

Alternative expressions:

(Average) Number of component B per entity (system 1) in system 2

Note 1: System 1 is countable entities, e.g. molecules, substances, cells, etc.

Definition by equation

Systematic terms

Entitic number of component B in system 1
Ratio scale
  • Value sets are positive numerical values
  • Algebraic operations are allowed (a=nb; a≠nb)
Numerical values from 0-∞

Unit

10-3,1 (one), 103, 106, 109, 1012, 1015, 1018, etc.

Note: The correct unit is e.g. “1015/1″ but “1” is omitted.

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.

Laboratory field

Examples

Clinical Chemistry

Example 1
Generic abbreviated form NPU01137 Lkcs(B)—Aldosterone receptor; entitic num.(proc.) = ?
Full form with a result NPU01137 Leukocytes(Blood)—Aldosterone receptor; entitic number(procedure) = 200 Aldosterone receptors per leukocyte
Abbreviated form with a result NPU01137 Lkcs(B)—Aldosterone receptor; entitic num.(proc.) = 200
Written expression The entitic number of Aldosterone receptor per leukocyte in Mr. Smith’s blood is [200]. The measurement is performed according to a procedure defined by the laboratory.
Equation

 

Notes
Alternative expression: The average number of aldosterone receptor is [200] per leukocyte in Mr. Smith’s blood.

Molecular Biological Genetics

Example 2
Generic abbreviated form NPU19268 DNA(spec.)—APOB gene(NG_011793.1:g.42786G>A); entitic num.(0 1 2) = ?
Full form with a result NPU19268 DNA(specification)—APOB gene(NG_011793.1:g.42786G>A); entitic number(0 1 2) = 1 APOB gene(NG_011793.1:g.42786G>A) per DNA molecule
Abbreviated form with a result NPU19268 DNA(spec.)—APOB gene(NG_011793.1:g.42786G>A); entitic num.(0 1 2) = 1
Written expression The entitic number of APOB gene(NG_011793.1:g.42786G>A) per DNA molecule in Mr. Smith’s leukocytes from blood is 1. The value set is 0,1 or 2.
Equation
Notes

Note 1: The value set is the numerical value of the number of the variant, existing on no alleles (0;homozygote), in one (1;heterozygote) or in both alleles (2;homozygote).

Note 2: The variant, APOB gene(NG_011793.1:g.42786G>A), exists in one allele (heterozygote) per DNA molecule.

Note 3: Alternative expression: The number of APOB gene(NG_011793.1:g.42786G>A) per DNA molecule in Mr. Smith’s leukocytes is 1.

Note 4: In this example, a local laboratory has specified (in the specification to system) that  DNA is in leukocytes derived from blood.

Clinical Immunology and Blood banking

Example 3
Generic abbreviated form NPU01952 Ercs(B)—Immunoglobulin G4; entitic num. = ?
Full form with a result NPU01952 Erythrocytes(Blood)—Immunoglobulin G4; entitic number = 46 Immunoglobulin G4s per erythrocyte
Abbreviated form with a result NPU01952 Ercs(B)—Immunoglobulin G4; entitic num. = 46
Written expression The entitic number of Immunoglobulin G4 per Eryhthrocyte in Mr. Smith’s blood is [46].
Equation
Notes Alternative expression: The average number of Immunoglobulin G4 is [46] per Erythrocyte in Mr. Smith’s blood.
Example 4
Generic abbreviated form NPU57680 T-lymcs(B)—T-cell Receptor Excision Circle; entitic num. = ? × 10-6
Full form with a result NPU57680 T-lymphocytes(Blood)—T-cell Receptor Excision Circle; entitic number = 179 T-cell Receptor Excision Circles per 106 T-lymphocytes
Abbreviated form with a result NPU57680 T-lymcs(B)—T-cell Receptor Excision Circle; entitic num. = 179 × 10-6
Written expression The entitic number of T-cell Receptor Excision Circle per T-Lymphocyte in Mr. Smith’s blood is [179] × 10-6.
Equation
Notes Alternative expression: The average number of T-cell Receptor Excision Circle is [179] × 10-6 per T-lymphocyte in Mr. Smith’s blood.

Clinical Microbiology

Example 5
Generic abbreviated form NPU14472 Lkcs(B)—Human gammaherpesvirus 4(DNA); entitic num.(proc.) = ? × 10-3
Full form with a result NPU14472 Leukocytes(Blood)—Human gammaherpesvirus 4(DNA); entitic number(procedure) = 467 Human gammaherpesvirus 4’s DNAs per 103 Leukocytes
Abbreviated form with a result NPU14472 Lkcs(B)—Human gammaherpesvirus 4(DNA); entitic num.(proc.) = 467 × 10-3
Written expression The entitic number of DNA from Human gammaherpesvirus 4 per Leukocyte in Mr. Smith’s blood is [467] × 10-3
Equation
Notes Alternative expression: The average number of DNA from Human gammaherpesvirus 4 is [467] × 10-3 per Leukocyte in Mr. Smith’s blood.

Reference

  NPU database, https://www.ifcc.org/ifcc-scientific-division/sd-committees/c-npu/npusearch/ and http://www.labterm.dk/default.aspx
  • Kind-of-property

    • Nominal kind-of-property

    • Kind-of-quantity

      • Unitary kind-of-quantity

        • Rational unitary kind-of-quantity

          • Entitic number

Reference

  • Dybkaer R. Concept system on ‘quantity’: formation and terminology. Accredit Qual Assur. 2013;18(3):253-60.
  • Dybkaer. ISO terminological analysis of the VIM3 concepts ‘quantity’ and ‘kind-of-quantity’. Metrologia. 2010;47(3):127-34.
Date Term Note
1996-01-01 Entitic number Term established.
Date Note Example
2019-03-18 Entitic number can easily be confused with number fraction. The difference is that for entitic number the component B is not the same component type of System 1, whereas for number fraction component B is the same component type of System 1

Note 1: Aldosterone receptor is a protein, whereas leukocytes are cells.

Note 2: The value set is numerical value from 0 to ∞, or what is physiological possible.

Note 1: Monocytes and leukocytes belong to the same cell type.

Note 2: The value set is numerical value from 0 to 1, or what is physiological possible.

2019-03-18 Entitic is a modifier to a kind-of-quantity (see Entitic (ent.))