Bauhaus-Universität Weimar

Reports of Visits to Foreign Laboratories, vol. 2 (1910) [Illustrated Typoscript in 7 volumes] Reproduced with the kind permission of Dr. Cecil E. Leith
Benedict, Francis Gano
Dr. Neubauer. 
Dr. Neubau or is very serious, very intense, and an indefatigable 
worker. Ile uses the Ilernst light as a source of monochromatic light, 
v;ith a saturated solution of potassium bichromate. The results,, he 
says, are very satisfactory, particularly as all the results are com¬ 
pared with one another. He deprecates strongly the use of animal char¬ 
coal in filtering solutions containing B-oxybutyric acid for he maintains 
that the acid is held back by the charcoal. The transition from 3-oxy- 
butyric acid to diacetic acid, he believes, is more or less of a rever¬ 
sible reaction, and in normal individuals there is no retardation of 
these oxidation steps. In diabetics there is probably a retardation 
after the diacetic acid step. Both B-oxybutyric acid and diacetic 
acid should be in about the same proportion, if there is equilibrium. 
As a matter of fact, he has recently found that this is so. Dr. Ileubauer 
has also made a number of important experiments on the syntheses in the 
living organ with artificial circulation. His theory with regard to the 
reversible reaction between B-oxybutyric and diacetic acid is certainly 
very interesting and worthy of further study.


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