On the elimination of nitrogen by the kidneys and intestines during rest and exercise, on a diet without nitrogen / by E. A. Parkes, M.D.

  • Parkes, Edmund A. (Edmund Alexander), 1819-1876.
Date:
[1867]
Catalogue details

Licence: Public Domain Mark

Credit: On the elimination of nitrogen by the kidneys and intestines during rest and exercise, on a diet without nitrogen / by E. A. Parkes, M.D. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

    16/22 (page 352)
    There was scarcely any difference in T., and only 10 per cent, difference in S. The Nitrogen. S. T. After rest- period. After work- period. After rest- period. After work- period. Urea. Total nitro- gen by soda- lime. Urea. Total nitro- gen by soda- lime. Urea. Total nitro- gen by soda- lime. Urea. Total nitro- gen by soda- lime. Third day 20-67 25- 68 26- 29 29-67 9-703 12- 304 13- 704 14- 260 20-8 26-364 28-32 30-10 10-237 13- 065 14- 590 15- 555 14-40 23-00 25-20 22-99 7-441 11- 480 12- 209 13- 231 23- 00 24- 36 24-57 21-36 11-.58 13-00 10-395 25-555 12-988 26-396 13-361 21-397 11-095 23-322 11-658 Mean of 3 days. Unfortunately, on the third day, in the case of T., the determination of the nitrogen hy soda-lime was not satisfactory, and as some time elapsed I before it could be again done, the amount has been omitted. But sup- posing there was the same relative excess over the ureal nitrogen as in the other days, the total nitrogen would have been 13*97 grms. Adopting this number, the following are the results :— s. T. 3-364 1-492 7-700 4-560 The question now arises, was this excess of nitrogen excreted during the after work-period the result of the elimination of the products of destroyed muscle during the work-period, or was it the consequence of an excess of nitrogenous food in the four days following the exercise ? S. took I'31 oz. avoirdupois more meat cooked and | oz. vegetables in the fifth than in the third period. The percentage of water in the meat was 57'49, and if the nitrogen be taken at 2-955 per cent,, there would be in 1-31 oz. of cooked meat M grm. of nitrogen. In the vegetable there would be about 0-04 grm. of nitrogen. But from this amount must be deducted -325 grm. of nitrogen not taken in the bread, making the total daily excess of nitrogen taken in the fifth period -815 grm.; the daily excess of nitrogen in the urine was, however, only -375 grm. ; there- fore, in the case of S., it cannot be affirmed that any excess of nitrogen was derived from disintegration of muscle during the exercise. In the case of T., the daily excess of nitrogen was larger, amounting daily to