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Rose Johnstone

Rose Mamelak Johnstone, FRSC, biochemist (born 14 May 1928 in Lodz, Poland; died 3 July 2009 in Montreal, QC). Rose Johnstone is best known for her discovery of exosomes, a key development in the field of cell biology. These tiniest of structures originating in all cells of the human body are vehicles that transport proteins, lipids and RNA from one cell to another. A pioneer of women in science, Johnstone was the first woman to hold the Gilman Cheney Chair in Biochemistry and the first and only woman chair of the Department of Biochemistry in McGill University’s Faculty of Medicine.


Har Gobind Khorana

Har Gobind Khorana, scientist (born 9 January 1922 in Raipur, India; died 9 November 2011 in Concord, Massachusetts). His mother was illiterate and his family impoverished. His first class was in the open on the edge of the Rajasthan Desert. Khorana's brilliance was obvious early and, with scholarships, he earned degrees in organic chemistry at Punjab University. He obtained a PhD at Liverpool (1948) and then spent three years studying proteins and nucleic acids at Cambridge. In spite of his ability, his race precluded him from appointment as a professor in Britain. In search of an outstanding young scientist, Gordon Shrum, a physicist from the University of British Columbia, hired Khorana to do organic chemistry at the British Columbia Research Council in Vancouver in 1952.


Walter Kohn

Walter Kohn, theoretical physicist, professor, Nobel laureate in chemistry (born 9 March 1923 in Vienna, Austria; died 19 April 2016, Santa Barbara, United States). A refugee in England at the outbreak of the Second World War, Kohn was arrested in 1940 as an “enemy alien” and sent to Canada, where he was held in detention camps until 1942 (see Canada and the Holocaust). After his release, he studied mathematics and physics at the University of Toronto and Harvard University. He taught for many years at the Carnegie Institute of Technology and later at the University of California, San Diego and was the founding director of the Institute for Theoretical Physics at the University of California, Santa Barbara. Kohn was at the forefront of solid-state physics and quantum chemistry during his scientific career. For his work on “density functional theory” he was named co-recipient of the Nobel Prize in Chemistry in 1998.