Gin which the term "Dutch courage" is believed to have originated. According to some unconfirmed accounts Gin originated in Italy. By the mid-17th century, numerous small Dutch and Flemish distillers had popularized the re-distillation of malt spirit or malt wine with juniper, anise, caraway, coriander, etc., which were sold in pharmacies and used to treat such medical problems as kidney ailments, lumbago, stomach ailments, gallstones, and gout. Gin emerged in England in varying forms by the early 17th century, and at the time of the Restoration, enjoyed a brief resurgence. Gin became vastly more popular as an alternative to brandy, when
Flavour (particle physics) description of the flavour symmetry is described by a chiral group . If all quarks had non-zero but equal masses, then this chiral symmetry is broken to the "vector symmetry" of the "diagonal flavour group" , which applies the same transformation to both helicities of the quarks. This reduction of symmetry is a form of "explicit symmetry breaking". The amount of explicit symmetry breaking is controlled by the current quark masses in QCD. Even if quarks are massless, chiral flavour symmetry can be spontaneously broken if the vacuum of the theory contains a chiral condensate (as it does in low-energy