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
Jill Valentine in the first novel, "" (1998), in a series by S. D. Perry. In "Resident Evil: The Umbrella Conspiracy" (1998), Perry's novelisation of the original game, Valentine's Delta Force background is not mentioned, but before her career in law enforcement she is said to have acted as an accomplice for her father, Dick Valentine, who was a professional thief. Several comic books based on the game series have also been released. Toys modeled on Valentine include action figures and figurines. She appears as a character in Bandai's "Resident Evil Deck Building Card Game" (2011). Actors portraying Valentine have appeared at