Laserfiche WebLink
PHYSICO-CHEMICAL PROPERTIES: The characteristics of a chemical which governs the <br /> chenucal's ability to move through different media, e g, pH, temperature, vapor pressure, <br /> density, etc. <br /> PPB: Part per billion, ex 1 second in 32 years <br /> 1 inch in 16,000 miles <br /> 1 pound in 500,000 tons, or <br /> 1 drop of water in 33,000 gallons <br /> PPM: Part per million, ex 1 second in 12 days <br /> 1 inch in 16 miles <br /> 1 pound in S00 tons, or <br /> 1 drop of water in 33 gallons <br /> RECEPTOR: A macromolecule with which a drug interacts to produce its characteristic effect <br /> REFERENCE DOSE (RfD): An estimate of the daily exposure of the human population to a <br /> toxicant that is likely to be without any incidence of deleterious effects <br /> RISK CHARACTERIZATION: The process of obtaining a quantitative estimate of risk by <br /> utilizing parameters associated with a particular contaminant and site,i e , toxicity and exposure <br /> RISK: A measure of the probability of the occurrence of adverse effects the product of <br /> potency x dose. <br /> THRESHOLD: The dose below which no effect occurs <br /> TOXICITY: The harmful effects from exposure to a substance on a specific living organism <br /> UNCERTAINTY ANALYSIS: The evaluation of the variability in the toxicity and dose <br /> estimates within their possible ranges It is often used to address the conservative of discrete <br /> parameters estimates describing site-related exposure and risk <br /> UPPER-CONFIDENCE LIMIT: The statistically defined maximum end of a range of possible <br /> outcomes <br /> G U=17tSANPAFE FNL hmW 26 93 ChcmRuk* 1993 <br />