The bacteriologist Sergei Nikolaievich Winogradsky (1856-1953) was born in Kyiv and educated at the University of St. Petersburg. He in specialized in agricultural and soil bacteriology. At Strasburg in 1887 he discovered "sulphur bacteria." At Zurich by 1890 he had also discovered the nitrogen-fixing bacteria, Nitrosamonas sp., Nitrococcus sp., and Nitrobacter sp., which underlie the nitrate-nitrite and amino acid-protein cycles of soil and plants.
Created 2 February 2023