rieß bernhard (8 Ergebnisse)

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Arch. Anat. Phys., 1869/3. - Leipzig, Veit et Comp., 1869, 8°, pp.272-400, 3 gefalt. gestoch. Taf., orig. Broschur. Seltener Sonderdruck! Bernhard Naunyn (1839-1925) war ein deutscher Internist und Hochschullehrer. Leopold Peter Riess (1840-1922) Mediziner.

Arch. Anat. Phys., 1869/3. - Leipzig, Veit et Comp., 1869, 8°, 21 pp., orig. Broschur. Rare Offprint! On elimination of uric acid.- B. Naunyn and L. Riess made experiments on the elimination of the uric acid, the most important constituent of the urine after the urea. They found on dogs fed with flesh the same proportion between urea and uric acid which Ranke states as existing in man, the similarity in these two cases ceasing, however, to exist when the food of the dogs consisted chiefly of non-nitrogenous substances. These two observers found, when the food contained proteine in only small quantities, no uric acid (and also no kynurenic acid), while Ranke and myself saw under the same conditions in the urine of man the uric acid decrease in quantity, but not entirely disappear. In a state of complete starvation we are told that the presence of uric acid was again observed in the urine, while we found a continued diminution. The two observers attempted to advance a proof that the increase in the elimination of the uric acid was consequent on the decreased oxidizing power of the blood. Induced by the supposition, which does not agree with my analysis, of which mention will be made below, that in leucocythscmia the decrease of the red blood-corpuscles is the cause of the diminished oxidating power of the blood, and, therefore, of the increase of uric acid, they tried to bring dogs under similar conditions. They made the animals anaemic by means of venesection. Although by these means the oxidizing power of the blood must have been lessened, still they could not find any sensible increase in the quantity of uric acid eliminated. They performed another series of experiments for the determination of the quantity of uric acid in diabetes. Everybody has experienced that, in analysing diabetic urine, it is often impossible to obtain uric acid by treatment with hydrochloric acid. Naunyn and Riess showed us a new method, which gives, even in such cases, satisfactory results. The uric acid is to be precipitated with acetate of mercury, the precipitate to be filtered, then suspended in water, and then to be decomposed by the action of sulphuretted hydrogen. The sulphuret of mercury formed in this manner is to be filtered. The uric acid contained in the filtrate can now be determined. They found by this method the proportion between uric acid and urea in diabetes = 1'99. After the administration of large doses of opium the quantity of uric acid slightly decreased in proportion to the urea." II.-On the Recent Progress of Uroscopy. By Dr. Karl Berthold Hofmann, Lecturer in the University of Vienna. (1872) Seltener Sonderdruck! Bernhard Naunyn (1839-1925) war ein deutscher Internist und Hochschullehrer. Leopold Peter Riess (1840-1922) Mediziner.