Penicillin nontoxic in humans by first performing toxicity tests in animals and then on humans. His subsequent experiments on penicillin's response to heat and pH allowed Fleming to increase the stability of the compound. The one test that modern scientists would find missing from his work was the test of penicillin on an infected animal, the results of which would likely have sparked great interest in penicillin and sped its development by almost a decade. The importance of his work has been recognized by the placement of an International Historic Chemical Landmark at the Alexander Fleming Laboratory Museum in London on
Valentine Vallis honoured with a footpath plaque in Albert Street, Brisbane, on the Queensland Literary Trail in 1996. Valentine Vallis Valentine Thomas Vallis (1916–2009) was a Queensland poet, lecturer and opera critic. Valentine "Val" Thomas Vallis was born in Gladstone, Queensland on 1 August 1916. His father, Michael was a fisherman and wharf worker. Vallis wrote of his father, mother Daisy and siblings in a number of his poems. After attending Gladstone State School and studying secretarial work at Rockhampton High School (1929-1932), Vallis became a clerk in the Gladstone Town Council. Throughout his childhood he had been an avid reader with