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
The Weapon Shops of Isher novel progresses, the reader's attention becomes "badly divided." The Weapon Shops of Isher The Weapon Shops of Isher is a science fiction novel by Canadian writer A. E. van Vogt, first published in 1951. The novel is a fix-up created from three previously published short stories about the Weapon Shops and Isher civilization: "The Weapon Shops of Isher" and its sequel "The Weapon Makers" detail the workings of Isher civilization and the adventures of Robert Hedrock, The One Immortal Man, as he keeps it in balance in the face of attempts by the Weapon Makers, who have forgotten their purpose