Dr. George Setterfield's contribution to scholarship in cell biology during the past 20 years is equal to the best in this country. His research interests are wide, and his work is highly respected for its penetration of important questions and for its rigorous standards. Nothing in his published work is trivial. His earlier research contributions include an elegant series of investigations on the fine structure and growth or plant cell walls. During the past 10 years, he and his graduate students have contributed much to the present understanding of the regulation of growth and reproduction of plant cells. His interest in regulatory phenomena have led also to recent productive studies of the role of chromosomal proteins in controlling structure and physiological activity of chromatin. Dr. Setterfield is a distinguished teacher. He stimulates and informs students at all levels - from those of the general public who are casually interested in science and its implications for society, to those interested specifically in the intricacies of the plant cell. His former graduate students now occupy positions on university faculties and in government laboratories, from the prairies to Newfoundland.

Michael Shaw was born in Barbados. His academic and research achievements at McGill, Cambridge, and Reading have been recognized by awards of five scholarships and fellowships. He was appointed Associate Professor of Biology at the University of Saskatchewan in 1950, Professor in 1954, and Head of the Department in 1961. Dr, Shaw's research in plant physiology has been mainly concerned with the functioning of stomata and the host-parasite relationships of cereals and fungi. Using tracers, chromatography, and cytochemical techniques, he has contributed to an understanding of the physiology of rust resistance in cereals. He became a Fellow of the Linnaean Society of London in 1960.

Dr. Shaw has done notable work in a variety of fields in acoustics but three contributions stand out. His work on vibrations of thick discs led to a theoretical solution and experimental verification of the classical problem of the vibration of thick discs. The work on ear defenders and circumaural high fidelity earphones are now standard references and the ear defenders are used throughout the world. His recent work explains in detail the interaction of the ear with a sound field and will lead to the first substantial improvement in hearing threshold measurements in 25 years.

Dr. Sheinin has used DNA tumor viruses and conditional lethal temperature sensitive mutants very effectively to probe the DNA synthetic machinery of eukaryotic cells. In the former system she has examined the mechanisms whereby polyoma virus controls DNA replication and affects the plasma membrane during neoplastic transformation. These studies together with the work using the conditional lethal mutants have elucidated several novel facets of the replicative machinery of somatic cells.

Leslie Webster Shemilt has gained national and international recognition for his research contributions to mass transfer aspects of corrosion, to elucidation of the natural convection effects on mass transfer, to the dynamics of liquid-fluidized systems, and to the thermodynamic and transport properties of non-ideal systems. Other contributions equally well recognized are to chemical engineering and engineering education, national and international scientific associations, to national and provincial research councils and agencies through editorships of scientific journals, and in national and international advisory roles on radioactive waste management.

David Shugar, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, is an internationally renowned scientist whose works are instrumental to the understanding of mutagenesis mechanisms and radiation-induced damage to nucleic acids. In addition to his unique contribution to the field of photochemistry, he undertook groundbreaking work in the chemistry and enzymology of DNA biosynthesis. This work led to the development of several anti-neoplastic and antiviral drugs. Shugar did pioneering work on the chemistry of nucleosides and nucleotides, pre-DNA matter, and has authored many books on the subject. As one of the co-founders of the European Journal of Biochemistry, he still serves as an active member on editorial boards for the most distinguished journals on photochemistry and the chemistry of nucleic acids.