Our research focuses on two rather different, but nevertheless interdependent areas: redox activity of transition-metal complexes and numerical analysis of multivariate data; Kinetics and activation parameters of biomimetic oxygenations and oxidations are studied by low-temperature diode-array stopped-flow spectrometry. Intensive international collaboration with more synthetically oriented groups, especially K.D. Karlin (The Johns Hopkins University, Baltimore) and W.B. Tolman (University of Minnesota), has become fruitful and of paramount importance to our research.