Role of antioxidants in health maintenance. Sardesai VM. Free radicals are produced in the body as by products of normal metabolism and as a result of exposure to radiation and some environmental pollutants. Because they are highly reactive, they can damage cellular components and are implicated in a variety of diseases.
P1 Material is the name given to Carbon Manganese Steel in the engineering industry.hus finally the P residue describes the aminoacid or molecule which can be found at that specific location of substrate.    P4-P3-P2-P1------P1'-P2' ------ = point of cleavage   S4-S3-S2-S1-[C]-S1'-S2'-S3'    Reference: Schechter and Berger (1967) On the size of active sites in proteases (Biochem. Biophys. Res.
polybutylene is a type of plastic resin that was used extensively in the manufacture of potable water piping from 1978 until 1995 shell and dupont were two of the primary manufacturers of the polybutylene also known as pb piping and fittingsolybutylene is a type of plastic resin that was used extensively in the manufacture of potable water piping from 1978 until 1995 shell and dupont were two of the primary manufacturers of the polybutylene also known as pb piping and fittings