The pascal (symbol: Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus and ultimate tensile strength. It is defined as one newton per square metre. It is named after the French polymath Blaise Pascal.
Wikipedia English The Free Encyclopedia. Organophosphate. An organophosphate (sometimes abbreviated OP) or phosphate ester is the general name for esters of phosphoric acid. Many of the most important biochemicals are organophosphates, including DNA and RNA, as well as many of the cofactors essential for life. Organophosphates are the basis of many insecticides, herbicides, and nerve agents.
(Science: chemistry) A phosphate group on a larger molecule, where the phosphorus is single bonded to each of the four oxygen s, and the other bond of one of the oxygen s is attached to the rest of the molecule. phosphate group. A functional group important in energy trans fer. phospholipid s ...