Attenuance
Definition in words |
Negative decadig logarithm of internal transmittance of a parallel beam of a rediation through that medium (system 1) | ||
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Definition by equation |
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Systematic terms |
Attenuance of system 1 | ||
Result type |
Logarithmic scale |
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Numerical values 0 to ∞ |
Unit |
One (1) Note: Absorbance unit is discouraged |
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Non-recommended term |
Extinction, optical density, optical transmission density, transmission density, | ||
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. |
Laboratory field |
Example |
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Clinical Chemistry |
Generic abbreviated |
NPU27959 Csf—Cerebrospinal fluid; attenuance(415 nm; UKNEQAS 2008) = ? |
Full result | NPU27959 Cerebrospinal fluid—Cerebrospinal fluid; attenuance(415 nm; UKNEQAS 2008) = 0.17 | |
Abbreviated result | NPU27959 Csf—Cerebrospinal fluid; attenuance(415 nm; UKNEQAS 2008) = 0.17 | |
Written expression | The attenuance of Mr. Smith’s cerebrospinal fluid is [0.17]. The measurement is obtained at 415 nm by a procedure defined by UK NEQAS guidelines from 2008. | |
Equation
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Reference |
NPU database, https://www.ifcc.org/ifcc-scientific-division/sd-committees/c-npu/npusearch/ and http://www.labterm.dk/default.aspx Cruickshank, A., Auld, P., Beetham, R., Burrows, G., Egner, W., Holbrook, I., … White, P. (2008). Revised national guidelines for analysis of cerebrospinal fluid for bilirubin in suspected subarachnoid haemorrhage. Annals of Clinical Biochemistry, 45(3), 238–244. https://doi.org/10.1258/acb.2008.007257 Beetham, R., Egner, W., & Patel, D. (2011). The UKNEQAS scheme for cerebrospinal fluid haem pigments: a paradigm for service improvement. Annals of Clinical Biochemistry, 48(6), 489–497. https://doi.org/10.1258/acb.2011.011031 |
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Kind-of-property
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Nominal kind-of-property
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Kind-of-quantity
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Unitary kind-of-quantity
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Rational unitary kind-of-quantity
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Attenuance
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Reference |
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Date | Term | Note |
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2010-03-22 | Attenuance | Term established |
NPU term identifier |
QU100589 |