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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 ...
Florence, South Carolina. Occupation. Author. Nationality. American. Website. www .varianjohnson .com. Varian Johnson (born in 1977) is an American writer, who writes contemporary middle grade literature. He is the author of multiple novels including My Life as a Rhombus.
Background Chlorine and caustic soda are produced at chlor-alkali plants using mercury cells or the increasingly popular membrane technology that is mercury free and more energy-
A Barber–Johnson diagram[example needed] is a method of presenting hospital statistics combining four different variables in a unique graph, introduced in 1973. [ 1] The method constructs a scattergram where length of stay, turnover interval, discharges, and deaths per available bed are combined. These four variables have a common ...
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 ]
Varian Medical Systems is an American radiation oncology treatments and software maker based in Palo Alto, California. Their medical devices include linear accelerators (LINACs) and software for treating cancer and other medical conditions with radiotherapy , radiosurgery , proton therapy , and brachytherapy .
Tanaka and Johnston analysis is a mixed dentition analysis which allows one to estimate the space available in an arch for the permanent teeth to erupt. This analysis was developed by Marvin M. Tanaka and Lysle E. Johnston in 1974 after they conducted a study on 506 orthodontic patients done in Cleveland at the Case Western Reserve University School of Dental Medicine.