Plasmon-Controlled Fluorescence Towards High-Sensitivity Optical Sensing -- Monitoring Mammalian Cell Cultivations for Monoclonal Antibody Production Using Near-Infrared Spectroscopy -- Optical Inline Measurement Procedures for Counting and Sizing Cells in Bioprocess Technology -- On the Design of Low-Cost Fluorescent Protein Biosensors -- Optical Instrumentation for Bioprocess Monitoring -- Environmental Applications of Photoluminescence-Based Biosensors.