In bulk protein purification, a common first step to isolate proteins is precipitation with ammonium sulphate (NH 4) 2 SO 4. This is performed by adding increasing amounts of ammonium sulphate and collecting the different fractions of precipitate protein.rotein purification is a series of processes intended to isolate one or a few proteins from a complex mixture, usually cells, tissues or whole organisms.
Phenolic disinfectants are effective bactericides, fungicides, tuberculocides and virucides, but are ineffective against spore-forming bacteria such as Clostridium difficile. EPA-registered phenolic disinfectants are used to disinfect surface areas and non-critical medical devices.
phenol. 1. an extremely poisonous compound obtained by distillation of coal tar or produced synthetically; used as a disinfectant and used extensively as a wood preservative. Called also carbolic acid. 2. any organic compound containing one or more hydroxyl groups attached to an aromatic or carbon ring.