Acknowledgments 



The publisher and the authors wish to acknowledge the 

 assistance of the following organizations in the preparation 

 of this volume: 



The United States Atomic Energy Commission, which 

 sponsored the preparation of this volume. 



Verlag-Birkhauser A.-G., Basel, for permission to reprint 

 the article from Experientia. 



The American Chemical Society, Washington, D.C., for 

 permission to reprint the article from the Journal of the 

 American Chemical Society. 



Elsevier Publishing Co., Inc., Amsterdam, for permission 

 to reprint the article from Biochimica et Biophysica Acta. 



