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.
Used on large skin areas (as in chemical peelings of the whole face), phenol is toxic (heart and kidneys). Phenolization is indicated in the treatment of ingrown nails (juvenile ingrown nail, pincer nail) or to destroy very thick nails where no medical treatment can be used. Severe vascular disorders are the only contra-indication to the use of the technique.