Once entered, the toxicity is estimated using one of several advanced QSAR methodologies. Users input a chemical to evaluate by drawing it in an included chemical sketcher window, entering a structure text file, or importing it from an included database of structures. TEST allows a user to estimate toxicity without requiring any external programs. Additional examples are provided in our Molecular Descriptors Guide Version 1.0.2. The molecular weight and the octanol-water partition coefficient are examples of molecular descriptors. Where x 1 and x 2 are the independent descriptor variables and a, b, and c are fitted parameters. Furthermore, the US EPA makes no claims concerning the accuracy of the data provided by TEST or its reliability for any purpose. EPA) makes no warranty, expressed or implied, as to the merchantability of TEST or its fitness for a particular purpose. The United States Environmental Protection Agency (U.S. TEST estimates the toxicity values and physical properties of organic chemicals based on the molecular structure of the organic chemical entered by the user.
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