This volume contains the contributions of the 10th Symposium on Analytical Ultracentrifugation, held in Regensburg, Germany, on March 13th to 14th, 1997. Topics in the following fields were presented: Technical innovations; innovations in data analysis; modeling; biological systems; ions and polyelectrolytes; polymers, colloids, supramolecular systems; emulsions, gels, and dispersions; interacting systems and assemblies.