1. The study of the physical and chemical properties of a drug, and its dosage form, as related to the onset, duration, and intensity of drug action.
2. The use of biological means to restore or clean up contaminated land; such as, by adding bacteria and other organisms that consume or neutralize contaminants in the soil.
3. The conversion of hazardous wastes and pollutants into harmless materials by the action of microorganisms.
4. The purposeful addition of organic materials to a contaminated environment to cause an acceleration of natural processes to degrade or transform hazardous organic contaminants into harmless conditions.