IMSHENETSKII 138 



Questions on the theory of flows of plastic substances on 

 surfaces. Applied Mathematics and Mechanics, 1954, 18, #3. 

 Law of plane sections in aerodynamics of high supersonic 

 speeds. Applied Mathematics and Mechanics, 1956, 20, #6. 

 Biography: 



V. S. Lenskii. Elasticity and Plasticity. On the works of 

 Stalin Prize Laureate, A. A. Il'yushin, Moscow-Leningrad, 

 1950. 

 Office: Institute of Mechanics of USSR Academy of Sciences 



Leningradskii Prospekt, 7 

 Moscow, USSR 

 Residence: Chistoprudnyii Bul'v. 9 



Moscow, USSR 

 Telephone: B3 71 52 



IMSHENETSKII, ALEXANDRE ALEKSANDRQVICH (Micro- 

 biologist) 



A. A. Imshenetskii was born January 8, 1905. He graduated 

 from the University of Voronezh in 1926. In 1930 he worked at 

 the U.S.S.R. Academy of Sciences Institute of Microbiology, 

 where he became Director in 1949. He was elected to the 

 U.S.S.R. Academy of Sciences in 1946 as a Corresponding Mem- 

 ber, and in June 1962, an Academician. 



Imshenetskii' s researches are in the structure, biology, indi- 

 vidual growth, variation and physiology of micro-organismso 

 In studying the construction of bacteria, he proved that the ma- 

 jority of them retain a significant amount of vital substance but 

 lack an individual morphological nucleus and that the latter is 

 found only in complex bacteria. He explored changes in the 

 structure of bacteria in the process of ontogeneses under the 

 influence of various external factors which enabled him to dis- 

 cover the metaphysical essence, the so-called theory of cyclo- 

 genics. His other work is the study of the biology of bacteria 

 which attack cellulose. His work includes a study on the influ- 

 ence of increased temperatures on the course of microbiologi- 

 cal processes (a comparable study of the nature of mesophilic 

 and thermophilic bacteria was made). He has explored groups 

 of cellulose, amylolytic, proteolytic and thermophilic bacteria, 

 which are of practical value. He showed ways of replacing the 

 mesophilic bacteria with the thermophylic which hastens the 

 course of microbiological processes (for example— fermen- 

 tation). A series of his research deals with the biology and 

 physiology of nitrifying bacteria; the variability and selectivity 

 of yeast, mold fungus and bacteria. 



