{ "items" : [
    { "id" : "http://dbpedia.org/resource/Ergun_equation"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "The Ergun equation, derived by the Turkish chemical engineer Sabri Ergun in 1952, expresses the friction factor in a packed column as a function of the modified  Reynolds number."] } } }
