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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 ]
Fillet (mechanics) In mechanical engineering, a fillet is a rounding of an interior or exterior corner of a part. An interior or exterior corner, with an angle or type of bevel, is called a "chamfer". Fillet geometry, when on an interior corner is a line of concave function, whereas a fillet on an exterior corner is a line of convex function ...
Tris (pentafluorophenyl)borane, sometimes referred to as "BCF", is the chemical compound (C6F5)3B. 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 BC3 core is planar. It has been described as the “ideal Lewis acid ” because of its high ...
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After disputed score on floor exercise triggered series of conflicting rulings, Court of Arbitration for Sport won't reconsider decision on Chiles.
The small piece of clay measures only 4.2 centimeters by 3.5 centimeters, it’s just 1.6 centimeters thick, and it weighs 28 grams. But despite its diminutive size, the tablet will help paint a ...
The Biopharmaceutics Classification System (BCS) is a system to differentiate drugs on the basis of their solubility and permeability. [1] This system restricts the prediction using the parameters solubility and intestinal permeability. The solubility classification is based on a United States Pharmacopoeia (USP) aperture.
The number of volumes fluctuated. It was originally a 24 volume set, but other print runs had 10, 12 or 20.; [2] 1919 was a 20 volume set as shown in the image above, as was 1951. [3] From 1949 Grolier also issued a Book of Knowledge Annual. [4] Encyclopaedia Britannica praised the index system that was introduced by the Book of Knowledge ...