Because of the marula tree's association with elephants, the distiller has made them its symbol and supports elephant conservation efforts, co-funding the Amarula Elephant Research Programme at the University of Natal, Durban.
Research conducted by the University of Natal found that aqueous extracts of P. myrtifolia proved effective against Candida albicans.
In 1938 she accepted the post of Senior Lecturer in Fine Art at the University of Natal, Pietermaritzburg, where she remained until 1957.
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• Developed and implemented a program-wide HIV/AIDS Awareness initiative in partnership with Harvard University's School of Public Health and the University of Natal.
Edgar Brookes dedicated his book A History of the University of Natal (1967) to Petrie.
Three years after leaving Argentina he joined the University of Natal, in northern Brazil, where he played and taught chamber music.