Opening Remarks..- Session I: Metabolism of Pentoses and Pentitols.- The Role of Pentitols and other Polyols in Evolutionary Development.- Vitamin B12-Dependent Conversion of Ribonucleotides to Deoxyribo-nucleotides..- Enzymatic Reduction of Ribonucleotides in Escherichia coli..- The Uronic Acid Pathway and its Defect in Essential Pentosuria..- Pentitol-Metabolizing Enzymes of the Uronic Acid Pathway..- Metabolism of Xylose by the Lens of the Eye..- Pentoses in Mucopolysaccharides and Glycoproteins..- Formation of a New Family of Aminopentose Phosphates by Extracts of Streptomyces albonigev..- Session II: Physiology of Pentoses and Pentitols.- Utilization of Xylitol in Animals and Man..- Utilization of Xylitol in Human Erythrocytes..- Experimental Findings on the Utilization of Xylitol in the Heart Muscle of the Guinea Pig..- Absorption of Xylitol..- Effect of Xylitol on the Metabolic Rate of Glucose in Alloxan Diabetic Rat Liver Slices..- Adaptive Processes Concerned with Absorption and Metabolism of Xylitol..- Comment: Inducing Effect of Xylitol in Rats..- Effect of Xylitol on Pyridine Nucleotide Levels in the Liver of Rats..- Characteristics of Sugar Transport in the Rabbit Adrenal. Studies by Non-Utilizable Pentoses and Xylitol..- Stimulation of Insulin Secretion by Xylitol Administration..- Comment: Effect of Intravenous Injection of Xylitol on Plasma Insulin..- Comment: Some Recent Observations on Xylitol-Induced Insulin Secretion..- Comment: The Effect of Glucose, Fructose, Xylitol or Sorbitol Loading on the Blood Sugar, Serum NEFA and Immuno-Reactive Insulin (IRI) in the Cases with Hyperinsulinism..- The Influence of Xylitol and other Polyols and Sugars on Fat Mobilization..- Comment: Xylitol Effect on Ketogenesis in Alloxan Diabetic Rat Liver Slice..- Comment: Effect of Xylitol on Individual Free Fatty Acids in the Plasma..- Comment: The Substitution of Dietary Carbohydrate with Xylitol and its Effect on the Plasma Lipids..- The Activity of the Glucuronic Acid Pathway in Human and Experimental Diabetes..- Prevention of Choline-Deficiency Fatty Liver of Rats with Xylitol..- Session III: Clinical Use of Pentoses and Pentitols.- The Effect of Intravenous Administration of Xylitol Solutions in Normal Persons and in Patients with Liver Diseases and Diabetes mellitus..- The Effect of Xylitol on Activities of Hepatic Enzymes in Normal and Alloxanized Rats..- Comment: Some Effects of Xylitol on Carbohydrate Metabolism..- Clinical Application of Xylitol in Diabetes..- Comment: Difference in Metabolic Effects of D-Ribose and Xylitol in the Diabetic State..- Preventing Effect of Xylitol on Suppression of Adrenocortical Function by Steroid Therapy..- The Use of Polyols in Pediatrics..- Comment: The Clinical Use of Xylitol in Pediatrics..- Carbohydrates and Polyols for Energy Supply of the Surgical Patient..- Xylitol Infusion Related to Pathophysiology in Anesthesia..- Observations on the Anticatabolic Effect of Xylitol in the Posttraumatic Phase..- Effect of Xylitol Administration on Levels of Blood Sugar and Plasma Free Amino Acids Following Abdominal Surgery..- Closing Remarks..- Participants at the Symposium.