Dr. Brook has an international reputation in organosilicon chemistry. His extensive studies of silanes bearing functional groups have resulted in important new synthetic methods and in the elucidation of the nature of the bonding in organosilicon compounds. He discovered the rearrangement of a-hydroxysilanes to silyl ethers, and his investigation of the mechanism of this reaction led to the first demonstration of the absolute configuration of asymmetric silanes. His work on the rearrangement of acylsilanes to siloxycarbenes has culminated in the discovery of a highly versatile method for the generation and isolation of a stable compound containing the elusive silicon-carbon double bond.

Dr. Brown is an imaginative and highly competent young scientist who has made major contributions to the field of gastrointestinal physiology through his discovery, isolation, determination of the amino acid structure, and development of radioimmunoassays of two new peptide hormones from the gut, 'Gastric Inhibitory Polypeptide (GIP)' and 'Motilin'. The former has the properties of 'enterogastrone', the hypothetical substance which inhibits acid gastric secretion and stomach emptying when fat enters the duodenum, and 'incretin', which stimulates insulin secretion when glucose is introduced into the duodenum. Motilin is released and stimulates gastric motility when the duodenal contents are alkaline, thus controlling pH. Clinical studies have continued the insulinotropic action of GIP in man and demonstrated that IRGIP is elevated in chronic pancreatitis, maturity onset diabetes and obesity. Thus GIP is very relevant to the problem of diabetes.

Dr. W.R. Bruce has made important contributions to medical research in three areas: First, by comparing the effects of chemotherapeutic agents on the proliferative capacity of normal and malignant cells, he devised a model to explain the action of drugs used in the treatment of human cancer. Second, by combining physical separation techniques with radioactive labelling, he traced the differentiation events that occur in the testis. He has applied this knowledge to develop a rapid and sensitive method for detecting the mutagenic effects of chemicals. Third, he developed computer programmes for clinical use in the many treatment centres operated by the Ontario Cancer Treatment and Research Foundation. This achievement not only permits the evaluation of cancer care in Ontario, but also provides a model for multi-centre assessment of results that can be applied widely and to many other diseases. Fourth, he has explored the development of Colon Cancer: identifying with J. Krepinsky the major fecal ....., ...., with R.P. Bird the ...... Crypt focus, the ...... colon cancer precursor; developing a .... trial methodology based on recurrence of clonic polyps; and exploring the relation between colon cancer and insulin resistance.

Dr. Bruton's research contributions are in the field of signal processing with emphasis on the synthesis, design and implementation of analog and digital filters for microelectronic circuits. He has invented the Frequency Dependent Negative Resistance (FDNR) filter and the Lossless Discrete Integrator (LDI) filter, both of which are widely used in telecommunications systems, and he currently carries out research on multidimensional filter theory and design. Dr. Bruton won the principal Manning Award in 1991.

Dr. Buck's work in epidemiology began thirty-five years ago and has received international recognition. She has served on numerous councils and Government committees in Canada and the United States, has been a member of the Science Council and a consultant to the Rockefeller Foundation. In 1978 the Government of Australia invited her to report on the state of teaching and research in epidemiology in that country. Dr. Buck is an associate editor of the Am.J.Epidemiology and on the board of editors of the International J. Epidemiology. She has served a three year term as President of the International Epidemiological Association and has travelled in Africa, South-East Asia and Europe on their behalf.

Donald Bures began his college work by winning a General Motors scholarship. He completed the four year mathematics program at Queen's University in three years and the M.A. and Ph.D. program at Princeton in three years. For his doctoral thesis he became an expert with infinite tensor products of von Neumann algebras and wrote a thesis which Professor C. C. Moore describes as 'a superb paper in a very difficult area'. This praise should not be taken lightily for Professor Moore is one of the outstanding analysts of this continent. Since then Bures has published four other articles, each of which made a solid contribution based on deep analysis and new techniques, yielding new and important results. These papers are appraised in the attached letters from Professors Moore, Glimm and Stormer. Although he is not yet very old, Professor Bures has directed several very good doctoral theses, namely those of: Charles Kerr, Ole Nielsen, David Promislow and P. K. Tam. Professor Bures' work is known to operator algebraists throughout the world and he is esteemed as one of the leading workers in the field.

Bushuk's early work with Winkler at McGill produced new information on the role of H bonds in dough structure and rheology. With Benoit of Strasbourg, he developed the theory for the relationship of copolymer composition and its light scattering properties. His work on gliadin has led to a method for 'fingerprinting' wheat varieties for identification required in registration and wheat grading. He led the team that discovered the high milling yield and exceptional blending capacity of Glenlea - Canada's first utility wheat.

Dr. Buyers has made, primarily through the use of neutron scattering, extensive and crucial contributions, both theoretical and experimental, to our knowledge of the structure and the excitations of condensed matter, in particular of magnetic excitations in both ordered and disordered crystals. His work on solitons in CsCoBr3 and on magnetic properties of uranium compounds is especially noteworthy. He has made pioneering studies of phonon-phonon interactions, the structure of liquid neon, structural phase transitions in antifluorite crystals, and lithium intercalation in layered compounds. He has also developed many innovative experimental techniques for both neutron scattering and positron annihilation. He made the first experimental discovery of the mass gap in quantum integral-spin chains.

Louis J. Cabri is a scientist who has attained international eminence for his work on sulphides and tellurides, on the platinum-group minerals, and more recently, for pioneering mineralogical applications of micro-beam trace-element analytical techniques such as micro-Proton-induced X-ray emission (PIXE) and Secondary-Ion Mass Spectrometry (SIMS). His fundamental work on the platinum-group minerals has brought order and understanding to a previously chaotic field of knowledge. All his work is characterized by innovative experimental approaches that have pioneered micro-beam precious-metal analysis, greatly advancing our knowledge and understanding of the behaviour of precious metals in Earth systems.

Since coming from Scotland to Canada in 1957 Dr. Glen Caldwell, has made outstanding contributions to the sciences of stratigraphy and paleontology, particularly to those pertaining to the Cretaceous System of the Western Interior of North America. His meticulous and critical approach to geological research and to science in general has earned him respect and admiration among his colleagues in Canada and the United States. His advice on nomenclatorial and editorial policy is much sought after and has led him to active participation in several national and international committees of geological organizations. Dr. Caldwell's reputation as a geologist of note is not only spread through his writings, which are substantial, but also through his many well-trained students. Beyond Dr. Caldwell's extensive geological knowledge lies an admirable administrative ability and wide cultural scope in literature, art, and music.

Alastair Graham Walter Cameron, Senior Research Officer, Physics Division, Atomic Energy of Canada Limited, Chalk River, is a world leader in the field of nuclear reactions at high temperatures and densities. A graduate of the University of Manitoba, with a doctor's degree from the University of Saskatchewan in 1952, he has recently been Senior Research Fellow at the California Institute of Technology. His work has led to a better understanding of the nuclear energy processes in stars, of the abundances of different elements in stars, and of the occurrence of stellar nova explosions at high densities and temperatures. Dr. Cameron's sound knowledge of nuclear physics, his bold imagination, and incisive mind have led him to make a remarkable contribution to nuclear astrophysics.