Session I Oxygen Measurements in Blood and Tissue.- A Method for Simultaneous Measurements of Bioelectric Activity and Local Tissue PO2 in the CNS.- Oxygen Fields Induced by Recessed and Needle Oxygen Microelectrodes in Homogeneous Media.- The Application of Histological Analysis for the Localization of Tissue PO2 and Local Blood Flow with the Example of the Glomus Caroticum of the Rabbit (Oryctolagus cuniculus).- A Method for Measuring Oxygen Uptake Rate Distributions Over the Surface Zone of Excised Tissues Using a 91-Cathode Electrode.- Monitoring of PO2 in Human Blood.- A New Approach to the Experimental Measurement of Mean Tissue PO2.- Pyrene Butyric Acid: A Non-Invasive Probe for In Situ Intracellular Oxygen Concentration.- Kryomicrophotometry as a Method for Analyzing the Intracapillary HbO2 Saturation of Organs Under Different O2 Supply Conditions.- Quantitative Fluorescence Photometry with Biological Fluids and Gases.- Control of Electrode Aging by a Periodic Anodization Technique.- Session II Blood Oxygenation.- Effects of 2,3-Diphosphoglycerate on Functional Properties of Hemoglobin and on Glycolysis of Human Erythrocytes.- The Effect of Red Cell 2,3-DPG Changes Induced by Diabetic Ketoacidosis on Parameters of the Oxygen Dissociation Curve in Man.- The Influence of MgCl2 on the O2-Hb-Binding Curve of Human Hemoglobin Under Intracellular Conditions.- Oxygen Transport and Hemodynamics of Stroma-Free Hemoglobin Solutions.- Oxygen Transport on Mount Everest: The Effects of Increased Hematocrit on Maximal O2 Transport.- Measurement of Oxygenation and Deoxygenation of a Single Red Cell of Chicken Embryo by Means of a Microphotometer.- Session III Tissue Respiration.- Cellular Control of Mitochondrial Respiration.- Influence of Hemoglobin Oxygen Affinity on Oxidation Reduction State of Cytochrome aa3 in Perfused Liver.- Problems in Determination of Oxygen Dissociation of Avian Blood.- Metabolic and Electron Microscopic Studies Post Mortem in Brain Mitocholã-