354. positive control A positive control is a useful proof to show that the system, reactants and environment under which the experiment is taking place are functioning without any errors. Positive controls are frequently antibodies reactive to the therapeutic and are used to support immunogenicity assays.
355. post-market surveillance Identification and collection of information on the safety of a medicinal product or device following release onto the market.
356. pipette A manual or automated mechanical device that can accurately and repeatedly transfer liquid volumes of biological fluids, stock solutions and solvents, among others.
357. pKa The negative base ten logarithm of the acid dissociation constant of a compound in aqueous solution. This gives a convenient measurement of acidity, or basicity with regards to the conjugate acid of a base.
