@prefix isq: <https://w3id.org/standards/isq/ontologies/core/> .
@prefix smart: <https://example.org/smart-sdu/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<isq:t9-39>
  a isq:Entry ;
  rdf:type isq:Quantity ;
  rdf:type smart:TermEntry ;
  dcterms:identifier "9-39" ;
  skosxl:prefLabel "diffusion coefficient <chemistry>"@en ;
  skosxl:altLabel "D"@en ;
  skos:definition "proportionality coefficient of local molecular concentration stem:[C_\"B\"] (<<t9-9.2>>) of substance stem:[\"B\"] in the mixture multiplied by the local average velocity (<<iso80000-3>>) stem:[v_\"B\"] of the molecules of stem:[\"B\"], and minus the gradient of the local molecular concentration stem:[C_\"B\"] (<<t9-9.2>>) of substance stem:[\"B\"] in the mixture, expressed by:\n\n[stem%unnumbered]\n++++\nC_\"B\" << v_\"B\" >> = -D bb(\"grad\") C_\"B\"\n++++\n"@en ;
  smart:hasBindingnessType "bindingness-type:normative" ;
  dcterms:isPartOf <isq:part-9> ;
  isq:hasUnit [
    skos:notation "m^2*s^(-1)" ;
    skosxl:prefLabel "square metre per second"@en
  ] ;
  iso:urn <urn:iso:std:iso:80000:-9:ed-2:en:item:9-39> .