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Bioconcentration. In aquatic toxicology, bioconcentration is the accumulation of a water-borne chemical substance in an organism exposed to the water. [1][2] There are several ways in which to measure and assess bioaccumulation and bioconcentration. These include: octanol-water partition coefficients (K OW), bioconcentration factors (BCF ...
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 ]
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.
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The triplet states, 3 S 1, with parallel spins (S = 1, M s = −1, 0, 1) are known as ortho-positronium (o-Ps), and have an energy that is approximately 0.001 eV higher than the singlet. [1] These states have a mean lifetime of 142.05 ± 0.02 ns , [ 2 ] and the leading decay is three gammas.
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 ...
Then-Sen. John F. Kennedy of Massachusetts married Jacqueline Lee Bouvier on this day in history, Sept. 12, 1953, in Newport, Rhode Island. Over 800 guests attended the church ceremony.
C ratio of 1.12372%. [2] A related standard is the use of wood, which has a δ 13 C of -25‰, as the material for which radiocarbon ages are calibrated. Since different materials have different δ 13 C values, it is possible for two samples of different materials, of the same age, to have different levels of radioactivity and different 14 C ...