Along with eggs, I've used previously unopened sour cream WAY (, way) past the date and do the same as you once it's opened. Between the pasteurization of the original milk and then innoculation with good microbes, the lower moisture content and the acidity, it's not a very hospitable environment for pathogens.
Cauterization definition, to burn with a hot iron, electric current, fire, or a caustic, especially for curative purposes; treat with a cautery. See more. Dictionary.com
cavitation(Noun) The formation, in a fluid, of vapor bubbles that rapidly collapse; especially in a rotating marine propeller or pump impeller. cavitation(Noun) The formation of cavities in an organ, especially in lung tissue as a result of tuberculosis. Cavitation. Cavitation is the formation and then immediate implosion of cavities in a liquid â i.e. small liquid-free zones â that are the consequence of forces acting upon the liquid. It usually occurs when a liquid is subjected to rapid changes of pressure that cause the formation of cavities where the pressure is relatively low.