Crystallization is also a chemical solidâliquid separation technique, in which mass transfer of a solute from the liquid solution to a pure solid crystalline phase occurs.In chemical engineering crystallization occurs in a crystallizer.or crystallization (see also recrystallization) to occur from a solution it must be supersaturated. This means that the solution has to contain more solute entities (molecules or ions) dissolved than it would contain under the equilibrium (saturated solution).
description methenamine is an anti infective medication that is used to help prevent infections of the urinary tract it is usually prescribed on a long term basis for individuals with a history of repeated or chronic urinary tract infectionsethenamine is an anti infective medication that is used to help prevent infections of the urinary tract it is usually prescribed on a long term basis for individuals with a history of repeated or chronic urinary tract infections
History. When amphetamine was first synthesized in 1887, by the German chemist L. Edeleano, the stimulant effects were not noticed. In the early 1930s, when amphetamine's CNS stimulant properties and use as a respiratory stimulant were discovered it was marketed as an inhaler for nasal congestion (Benzedrine&#169).5 When mixed with alcohol or other drugs, the effects of prescription amphetamines are enhanced. 16 The onset of effects from injecting methamphetamines occurs immediately. When this drug is snorted, effects occur within 3 to 5 minutes; when ingested orally, effects occur within 15 to 20 minutes.