Indicators for optical oxygen sensors -- Electron transfer mechanisms between microorganisms and electrodes in bioelectrochemical systems -- Synthesis and application of monodisperse polymeric nano- and micro-particles -- Upconverting phosphor labels for bioanalytical assays -- Biosensors based on periplasmatic binding proteins -- Periplasmic binding proteins in biosensing applications -- Hyphenation of electrochemistry with mass spectrometry for bioanalytical studies.