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.
What is PPS? Polyphenylene Sulfide (PPS) Polymer Characteristics. PPS is an engineering polymer whose structure is composed of benzene and sulfur. Polyphenylene sulfide (PPS) is a partially crystalline, high temperature performance polymer that has the chemical structure shown in the figure on the right. This polymer has a high melting point of approximately 280Â°C, excellent chemical resistance and is inherently flame retardant.