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Bromochlorodifluoromethane (BCF), also referred to by the code numbers Halon 1211 and Freon 12B1, is a haloalkane with the chemical formula C F 2 Cl Br. It is used for fire suppression, especially for expensive equipment or items that could be damaged by the residue from other types of extinguishers. [ 1 ]
Fugacity and BCF relate to each other in the following equation: = [6] where Z Fish is equal to the Fugacity capacity of a chemical in the fish, P Fish is equal to the density of the fish (mass/length 3), BCF is the partition coefficient between the fish and the water (length 3 /mass) and H is equal to the Henry's law constant (Length 2 /Time 2) [6]
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Tris(pentafluorophenyl)borane, sometimes referred to as "BCF", is the chemical compound (C 6 F 5) 3 B.It is a white, volatile solid. The molecule consists of three pentafluorophenyl groups attached in a "paddle-wheel" manner to a central boron atom; the BC 3 core is planar.
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Basalt fiber is a type of fiber made from melting and extruding basalt rock. It has high strength, elastic modulus and specific strength, and can be used for various purposes such as reinforcement, insulation and textile.
A 1951 USAF resolution test chart is a device for measuring optical resolution of imaging systems. It consists of 54 target elements with different spatial frequencies, from 0.250 to 912.3 lp/mm, arranged in a spiral pattern.
John Thornton chart showing "Hudson Straights commonly call'd the Norwest Passage" (JCB Library) Thornton, "the most competent and distinguished chart-maker in England" [1] was also a surveyor and an engraver. So far as is known, it was in England a unique combination of skills. [39] Thornton worked in the Minories just outside the City limits.