395 TOROPOV 



colleges and universities. He was awarded Stalin Prizes in 



1946 and 1951, and was made an Honored Scientist of the 



R.S.F.S.R. in 1947. In July 1962, he received the Order of the 



Red Banner of Labor. In 1953 he was elected to the U.S.S.R. 



Academy of Sciences as a Corresponding Member. 



Timofeev studied photoeffect, the secondary emission of 



electrons, discharge in gases, and electronic optics. He has 



designed photocells, electronic multipliers, transmitting tubes. 



Together with others he designed a series of new electronic 



devices. 



Bibliography: 



On the mechanism of secondary emission of electrons from 

 complex surfaces. Zhur. Tekh. Fiz., 1940, 1£, #1. 

 Photocells with multistage amplification of the photocurrent 

 with the aid of secondary emission of electrons. Zhur. Tekh. 

 Fiz., 1940, 10, #1. 



and V. V. Sorokina. On the form of the field for electro- 

 static lenses. Zhur. Tekh. Fiz., 1948, 18, #4. 

 Emission of electrons from complex surfaces. Radiotekh- 

 nika i Electronika, 1957,_2, #1. 



Office: USSR Academy of Sciences 



Leninskii Prospekt, 14 

 Moscow, USSR 



Residence: Fil'skoe sh. 5. 

 Moscow, USSR 



Telephone: G9 00 03, Ext. 180 



TOROPOV, NIKITA ALEKSANDROVICH (Physical Chemist) 



N. A. Toropov was born June 28, 1908. He graduated in 1930 

 from Leningrad Polytechnical Institute. From 1930 to 1941 and 

 1944 to 1953, he worked at Lensovet Leningrad Technological 

 Institute where, in 1940, he became professor. He had worked 

 from 1941 to 1944 at the "Giprocement" Institute. In 1953, he 

 became Director of the U.S.S.R. Academy of Sciences Institute 

 of Silicate Chemistry. Toropov has been an Active Member of 

 the U.S.S.R. Academy of Construction and Architecture since 

 1957. As of June 1962 he was elected Corresponding Member 

 of the U.S.S.R. Academy of Sciences. In 1952 he received a 

 State Prize. 



Toropov' s work deals with mineralogy of silicates and physi- 

 cal chemical investigation of silicate systems. He also investi- 

 gated problems in physical chemistry of semi-conductors and 

 ferrite materials. 



