Inhalation of magnesium oxide fumes can cause metal fume fever. Exposure to zinc oxide fumes can lead to a sickness named "metal fume fever". Most fume hoods for industrial purposes are ducted. A large variety of ducted fume hoods exist. The catalyst is what cleans the exhaust fume particles. Neither are most BSCs safe for use as fume hoods. Reactive powder concretes may also make use of silica fume as a fine aggregate. The readily dispersed powder is sometimes called silica fume. Nearby, Nederman UK make fume extraction equipment. Standard specifications for silica fume used in cementitious mixtures are ASTM C1240, EN 13263. May also be caused by pneumoconiosis and long-term fume inhalation. The barrel was equipped with a fume extractor. The word "sfumato" comes from the Italian language and is derived from "fumo" ("smoke", "fume"). The gas is used in the final stage of ASHRAE 110 fume hood qualification. The first testing of silica fume in Portland-cement-based concretes was carried out in 1952.