கண்டுபிடிப்புகள் மற்றும் கண்டுபிடிப்பாளர்கள்:- D..E

கண்டுபிடிப்புகள் மற்றும் கண்டுபிடிப்பாளர்கள்:- D..E

DDT :-

Othmar Zeidler, Germany, 1874.

Detector, Metal :-

Gerhard Fisher, Germany/U.S.A., late 1920s.

Deuterium :-

(heavy hydrogen) Harold Urey, U.S.A., 1931.

DNA:-

(deoxyribonucleic acid) Friedrich Meischer, Germany, 1869; (determination of double-helical structure) F. H. Crick, England and James D. Watson, U.S.A., 1953.

Dye :-

William H. Perkin, England, 1856.

Dynamite :-

Alfred Nobel, Sweden, 1867.

Electric Generator (dynamo) :-

(laboratory model) Michael Faraday, England, 1832; Joseph Henry, U.S.A., c.1832; (hand-driven model) Hippolyte Pixii, France, 1833; (alternating-current generator) Nikola Tesla, U.S.A., 1892.

Electron :-

Sir Joseph J. Thompson, U.S.A., 1897.

Electronic Mail :-

Ray Tomlinson, U.S.A., 1972.

Elevator, Passenger :-

Elisha G. Otis, U.S.A., 1852.

E=mc2:

(equivalence of mass and energy) Albert Einstein, Switzerland, 1907.

Engine, Internal Combustion :

No single inventor. Fundamental theory established by Sadi Carnot, France, 1824; (two-stroke) Etienne Lenoir, France, 1860; (ideal operating cycle for four-stroke) Alphonse Beau de Roche, France, 1862; (operating four-stroke) Nikolaus Otto, Germany, 1876; (diesel) Rudolf Diesel, Germany, 1892; (rotary) Felix Wanket, Germany, 1956.

Evolution :-

 (organic) Jean-Baptiste Lamarck, France, 1809; (by natural selection) Charles Darwin, England, 1859.