July 15, 1931 – September 18, 2025. Peder Jan Estrup, age 94, of Santa Barbara, California passed away on Thursday, September 18, 2025. As Professor in both Physics and Chemistry as well as Dean of the Graduate School and Research, Professor Estrup promoted and encouraged interaction and collaboration between departments and among different departments. He taught in both physics and chemistry departments and had graduate students from both departments. 

A full obituary can be found in Chemical and Engineering News.