Acknowledgements
It is a pleasure to take this occasion to thank the personnel of the Laboratory of Radiation Biology and the faculty
of the College of Pisheries of the
whose efforts have provided support,
University of
Washington
stimulation and encourage-
ment in this work.
I am particularly indebted to Dr. A. D. Welander for his
counsel and guidance throughout the entire period in which this
work was undertaken,
and to Dr. Lauren R. Donaldson for the
allocation of funds, travel,
laboratory equipment and space,
and instrument time under A.E.C.
Contract No. AT(45-1)1385,
without which this work could not have been attempted.
Especial thanks are due to Dr.
Prank G.
Lowman who first
stimulated my interest in the role of transition elements in
marine biota,
and who taught me the techniques of gamma spec-
trometry.
I am grateful to Dr.
Diptiman Chakravarti for his assist-
ance in working out the chemical techniques for the separation
and determination of stable zinc employed
in this work.
To Dr. A. M. Dollar I am indebted for many stimulating
discussions which proved invaluable in developing my understanding of
many of the physico-chemical and biochemical aspects of
JO