Ice cream, with a twist by Matthew Modoono September 19, 2016 Share Facebook LinkedIn Twitter Marissa Puzam and Jessica Fitzgerald, both PhD’19, make ice cream with liquid nitrogen on Krentzman Quad Friday. The ice cream social was hosted by members of the Graduate Women in Science and Engineering (GWISE) and GradQ. Photo by Matthew Modoono/Northeastern University Marissa Puzam and Jessica Fitzgerald, both PhD’19, make ice cream with liquid nitrogen on Krentzman Quad Friday. The ice cream social was hosted by members of the Graduate Women in Science and Engineering (GWISE) and GradQ. Photo by Matthew Modoono/Northeastern University