His subsequent work on chemical changes in the bacterial cell proved to be of great importance in later research work on antibiotics and therapeutic agents, and his book, The Chemical Kinetics of the Bacterial Cell was published in 1946, followed by Growth, Function and Regulation in Bacterial Cells in 1966.
Hans efterfølgende arbejde om kemiske ændringer i bakterieceller viste sig at være af stor værdi for den senere udvikling af antibiotika og terapeutiske stoffer, og hans bog, The Chemical Kinetics of the Bacterial Cell, blev udgivet i 1946, efterfulgt af Growth, Function and Regulation in Bacterial Cells i 1966.