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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 ]
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.
[15] k 1 is the rate constant for chemical uptake from water at the respiratory surface (L*kg −1 *d −1). [15] C WD is the chemical concentration dissolved in water (g*L −1 ). [ 15 ] k 2 ,k E ,k G ,k B are rate constants that represent excretion from the organism from the respiratory surface, fecal excretion, metabolic transformation, and ...
The basalt fibers typically have a filament diameter of between 10 and 20 μm which is far enough above the respiratory limit of 5 μm to make basalt fiber a suitable replacement for asbestos. [5] They also have a high elastic modulus , resulting in high specific strength —three times that of steel .
Perfluoroalkyl and polyfluoroalkyl substances, better known as PFAS, can affect your health. Here’s what you need to know about these chemicals in everyday products.
c is an empirical constant known as the fatigue ductility exponent, commonly ranging from -0.5 to -0.7. Small c results in long fatigue life. ς f ' is a constant known as the fatigue strength coefficient; b is an empirical constant known as the fatigue brittleness exponent. The first half of the equation indicates the Plastic region and the ...
A C 62 derivative [C 62 (C 6 H 4-4-Me) 2] synthesized from C 60 and 3,6-bis(4-methylphenyl)-3,6-dihydro-1,2,4,5-tetrazine. The C 60 molecules can also be coupled through a [2+2] cycloaddition, giving the dumbbell-shaped compound C 120. The coupling is achieved by high-speed vibrating milling of C 60 with a catalytic amount of KCN.
In thermodynamics, the Volume Correction Factor (VCF), also known as Correction for the effect of Temperature on Liquid (CTL), is a standardized computed factor used to correct for the thermal expansion of fluids, primarily, liquid hydrocarbons at various temperatures and densities. [1] It is typically a number between 0 and 2, rounded to five ...
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