ScienceJohn Michels (Journalist) 1952 |
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Стр. 45
... nature of re- sistance . Selection presupposes differences between cells , arising adaptively or by mutation . Appropri- ate use of the selective agent will change the aver- age composition of a population , resulting in the ...
... nature of re- sistance . Selection presupposes differences between cells , arising adaptively or by mutation . Appropri- ate use of the selective agent will change the aver- age composition of a population , resulting in the ...
Стр. 269
... Nature , 163 , 666 ( 1949 ) . 4. NAORA , H. J. Japan . Chem . , 5 , 729 ( 1951 ) . 5. LEUCHTENBERGER , C. Chromosoma , 3 , 449 ( 1950 ) . 6. LEUCHTENBERGER , C. , et al . Exptl . Cell . Research , 3 , 240 ( 1952 ) . 7. POLLISTER , A. W. ...
... Nature , 163 , 666 ( 1949 ) . 4. NAORA , H. J. Japan . Chem . , 5 , 729 ( 1951 ) . 5. LEUCHTENBERGER , C. Chromosoma , 3 , 449 ( 1950 ) . 6. LEUCHTENBERGER , C. , et al . Exptl . Cell . Research , 3 , 240 ( 1952 ) . 7. POLLISTER , A. W. ...
Стр. 560
... Nature Sanctuaries and will continue to direct the work of revising Nature Sanctuaries in the U. S. and Canada . As coordinator of preservation committees , Albert M. Fuller will guide committees on National Problems , Preservation of ...
... Nature Sanctuaries and will continue to direct the work of revising Nature Sanctuaries in the U. S. and Canada . As coordinator of preservation committees , Albert M. Fuller will guide committees on National Problems , Preservation of ...
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