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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 ]
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 ...
C ratio of 1.12372%. 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
Radiocarbon calibration. Radiocarbon dating measurements produce ages in "radiocarbon years", which must be converted to calendar ages by a process called calibration. Calibration is needed because the atmospheric 14. C: 12. C ratio, which is a key element in calculating radiocarbon ages, has not been constant historically.
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 Jeff Younger–Anne Georgulas custody battle was a highly publicized United States family law dispute between parents Jeff Younger and Anne Georgulas regarding their twin children. It was litigated between 2018–2022 in the Texas Courts, ultimately reaching the Texas Supreme Court , and was subsequently litigated in California.
Family law. Child custody, conservatorship and guardianship describe the legal and practical relationship between a parent and the parent's child, such as the right of the parent to make decisions for the child, and the parent's duty to care for the child. Custody issues typically arise in proceedings involving divorce, as well as in paternity ...