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Rydberg, Johannes Robert

(Encyclopedia)Rydberg, Johannes Robert yo͞oˈhänəs rôˈbərt rüdˈbĕryə [key], 1854–1919, Swedish physicist. Rydberg was a professor at Lund from 1901 to 1919. He is best known for his grouping of the freq...

Nyköping

(Encyclopedia)Nyköping nüˈchöˌpĭng [key], city (1990 pop. 26,380), capital of Södermanland co., SE Sweden, a port on the Baltic Sea. It is a commercial and industrial center, producing flour, textiles, iron ...

water, desalination of

(Encyclopedia)water, desalination of, process of removing soluble salts from water to render it suitable for drinking, irrigation, or industrial uses. The principal methods used for desalination include distillatio...

catalyst

(Encyclopedia)catalyst, substance that can cause a change in the rate of a chemical reaction without itself being consumed in the reaction; the changing of the reaction rate by use of a catalyst is called catalysis...

respiration

(Encyclopedia)CE5 Respiratory system respiration, process by which an organism exchanges gases with its environment. The term now refers to the overall process by which oxygen is abstracted from air and is tran...

Black Tom

(Encyclopedia)Black Tom, part of Jersey City, N.J., also called Black Tom Island. In July, 1916, German saboteurs demolished U.S. munitions stores there; in Jan., 1917, they destroyed the Kingsland, N.J., munitions...

Delors, Jacques

(Encyclopedia)Delors, Jacques (Jacques Lucien Jean Delors) zhäk lo͞osyăNˈ zhäN dəlôrˈ [key] 1925–, French economist and politician and European statesman, president (1985–95) of the European Commission....

Ritz, Walter

(Encyclopedia)Ritz, Walter, 1878–1909, Swiss physicist. He taught at the universities of Zürich and Göttingen. Ritz's combination principle, confirmed by later research, stated that the frequencies of spectral ...

nuclear physics

(Encyclopedia)nuclear physics, study of the components, structure, and behavior of the nucleus of the atom. It is especially concerned with the nature of matter and with nuclear energy. ...

electrode

(Encyclopedia)electrode, terminal through which electric current passes between metallic and nonmetallic parts of an electric circuit. In most familiar circuits current is carried by metallic conductors, but in som...