Mass-to-charge ratio refers to the molecular or atomic mass number and "z" to the charge number of the ion; however, the quantity of "m"/"z" is dimensionless by definition. An ion of 100 atomic mass units ("m" = 100) carrying two charges ("z" = 2) will be observed at "m"/"z" = 50. In the 19th century, the mass-to-charge ratios of some ions were measured by electrochemical methods. In 1897, the mass-to-charge ratio of the electron was first measured by J. J. Thomson. By doing this, he showed that the electron was in fact a particle with a mass and a charge, and that
Duane (given name) Duane (given name) Duane is both a given name for a male, and a family name. It seems to have a convergent etymology from several sources. The name derives from St. Dubhán, a Welsh Saint who established an abbey in Hook Head, Ireland, during the 5th century. As a surname it is O'Dubhain, or Dubhan. Dubhain was a popular given name in 16th century southern Ireland; its anglicized form is Duane. Many people may claim that one of the name's origins is the Norman "D'Wain" ("of Wagons") or the Old English version meaning "field" or "meadow". However, Duane is an