CONTENTS 



Preface v 



1. Principles of Radiological Physics 1 - 



Ugo Fano, Physicist, National Bureau of Standards, Washington, D.C. 



2. The Measurement of Ionizing Radiations for Biological 

 Purposes 145 



L. D. Marinelli, Senior Biophysicist; Associate Director, Radiological 

 Physics Division; Associate Director, Division of Biological and Medical 

 Research, Argonne National Laboratory, Lemont, Illinois 



L. S. Taylor, Chief Atomic and Radiation Physics Division, National 

 Bureau of Standards, Washington, D.C. 



3. Physical Principles Underlying Photochemical, Radia- 

 tion-Chemical, AND Radiobiological Reactions. . . . 191 "^ 



James Franck, Professor of Physical Chemistry (Emeritus) ; Member of 

 the Institute for Radiobiology and Biophysics (Fels Fund), University of 

 Chicago, Chicago, Illinois 



Robert Platzman, Professor of Physics, Department of Physics, Purdue 

 University, Lafayette, Indiana 



4. Basic Radiation Biochemistry 255 



Walter M. Dale, Principal, Department of Biochemistry, Christie Hospi- 

 tal and Holt Radium Institute, Manchester, England 



5. The Effect of X Rays on Systems of Biological Impor- 

 tance 283 ^ 



E. S. Guzman Barron, Associate Professor of Biochemistry, Chemical 

 Division, Department of Medicine (Lasker Foundation for Medical 

 Research), University of Chicago, Chicago, Illinois 



6. The Radiobiological Importance of Linear Energy Trans- 

 fer 315 



Raymond E. Zirkle, Professor of Radiobiology, Institute of Radiobiology 

 and Biophysics, University of Chicago, Chicago, Illinois 



7. The Nature of the Genetic Effects Produced by Radia- 

 tion 351 



H. J. Midler, Professor of Zoology, Department of Zoology, Indiana 

 University, Bloomington, Indiana 



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