Naphthenic acid agents, thickening agent of napalm and oil drying agents used in painting and wood surface treatment. Industrially useful naphthenates include those of aluminium, magnesium, calcium, barium, cobalt, copper, lead, manganese, nickel, vanadium, and zinc. One oft-cited study stated that "naphthenic acids are the most significant environmental contaminants resulting from petroleum extraction from oil sands deposits." However "under worst-case exposure conditions, acute toxicity is unlikely in wild mammals exposed to naphthenic acids in AOS tailings pond water, but repeated exposure may have adverse health effects." Naphthenic acids are present in Athabasca oil sands (AOL) tailings pond water (TPW) at an estimated
Proper name (philosophy) Proper name (philosophy) In the philosophy of language a proper name, for example the names of persons or places, is a name which is ordinarily taken to uniquely identify its referent in the world. As such it presents particular challenges for theories of meaning and it has become a central problem in analytical philosophy. The common sense view was originally formulated by John Stuart Mill in "A System of Logic" where he defines it as "a word that answers the purpose of showing what thing it is that we are talking about but not of telling anything about it". This