What is the fine-grained topic of the following text: The research was led by Nathan Gianneschi, an associate director of Northwestern University’s International Institute for Nanotechnology; Michael Burkart, a chemical biologist and expert in enzymology at UC San Diego; and Cornell Associate Professor Peter Frazier, who brought expertise in operations research and machine learning to the project. Only return the topic.
Research project collaboration in Nanotechnology, Enzymology, Operations Research and Machine Learning.