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  Carl Klaus

  
  Russian chemist, corresponding member of the Petersburg academy of
  sciences (since 1861)
  
  In 1815 in the Derpt university Klaus passed examinations for a
  pharmacist.
  
  Since 1839 - professor of chemistry at the Kazan university.
  
  Since 1852 - professor of pharmacy at the Derpt university.
  
  Klaus's works on research of platinum metals, begun in 1840, are widely
  known. He established structure of the rests of the Ural platinum ore
  received after its dissolution in Tsar vodka; found ways of transformation
  of platinum metals in solution, developed new methods of division of
  platinum metals and ways of reception of them in the pure state, received
  many of chemical compounds for the first time .
  
  In 1844 Klaus discovered in the rests of the Ural platinum ore the new
  element and named it ruthenium (from Lat. Ruthenia - Russia). Klaus received
  ruthenium in the pure state, studied its chemical properties and defined its
  nuclear weight.
  
  Works of Klaus had a very important value for creation of the platinum
  industry, especially for development of methods of reception in the pure
  state of iridium, rodium, osmium and ruthenium.
  
  Klaus is known as botanist (florist and partly botanist-geographer) -
  researcher of flora and vegetation of the Volga region and Caspian steppes.


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