Proceedings of the Meeting on Theory and Application of Ion Selective Electrodes in Physiology and Medicine, held at Dortmund on July 28-30, 1980The Ability of the Peptide Backbone to Bind Anions as well as Cations Implications for Peptide Carriers, Channels and Electrodes.- New Ion-Selective Membranes.- Microelectrodes for Novel Anions and their Application to Some Neurophysiological Problems.- Carrier Based Ion-Selective Liquid Membrane Electrodes and their Medical Applications.- Mono-/bivalent Ion Selectivities Obtained by the Nicolsky and the Electrodiffusional Regimes.- Fluorinert Liquids and the Use of Microelectrodes.- A Double-Channel Ion-Selective Microelectrode with the Possibility of Fluid Ejection for Localization of the Electrode Tip in the Tissue.- A Low-Noise, Rapid Microeletrode.- A Small Flexible pH-Electrode for Esophageal Monitoring.- Bio-Electrodes for L-Histidine A Pseudomonas Bacterial Electrode and a Histidine Ammonia-Lyase Enzyme Electrode.- Recent Developments in the Field of Enzyme Membrane Electrodes.- Lactate Measurements with an Enzyme Optode that Uses Two Oxygen Fluorescence Indicators to Measure the Po2 Gradient Directly.- Calibration Standards for Multi Ion Analysis in Whole Blood Samples.- Experience with Direct-Dip Potentiometry of Blood Serum Electrolytes.- Intravascular K+ -Sensitive Electrodes for Clinical Monitoring.- Clinical Evaluation of a Nova 1 Sodium/Potassium Electrode in a Cardiac Surgical Intensive Care Unit.- Distribution of Intra- and Extracellular K+ in the Leech Central Nervous System Studied Using Double-Barrelled Ion-Sensitive Microeletrodes.- The Role of Extracellular Potassium and Hydrogen Activities in the Brain Cortex for Regulation of Cerebral Microcirculation in the Cat During Generalized Seizures and Specific Sensory Stimulation.- Possible Potassium Sources in Activated Loci of Mammalian Neocortex as Reflected by Electrical Currents and Potassium Changes in the Extracellular Space.- The Kinetics of the Pols