Animated Logo of the Martini Forcefield (VIDEO) University of Groningen This video is under embargo. Please login to access this video. Caption The Martini forcefield typically combines four heavy atoms and any attached protons into one so-called bead. Users can then simulate interactions between the beads, which reduces the number of particles in the simulation. Credit University of Groningen Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.