SECOND NITROGEN BALANCE.

Commencing February 29, a second nitrogen balance was attempted with very

different results. This balance period extended through seven days and

was characterized by an average daily intake of 9.50 grams of nitrogen,

an increase of 1.3 grams of nitrogen per day over the preceding period,

together with an average fuel value of the food equal to 2500 calories

per day.

The daily diet with its content of nitrogen, etc., is detailed under

Oakman. Any variations (only slight ones) from this diet are indicated

on the individual balance-sheets, corrections being made in the nitrogen

intake.

In all of the men, with one exception, a distinct plus balance is seen,

showing that under the conditions of this experiment the men were all

storing up nitrogen. The plus balance per day varied from 0.132 gram to

1.231 grams of nitrogen.

The average daily output of nitrogen through the urine for this seven

days’ period (Oakman’s case) was 7.24 grams, being 0.28 gram less per day

than in the preceding period. Sliney, the one man who failed to show a

positive balance, was apparently losing nitrogen at the rate of 0.48 gram

per day during this period.

All of the individual data are shown in the accompanying tables of

results:

Physiological economy in nutrition, with special reference to the minimal proteid requirement of the healthy man an experimental study · 第 133 / 237 题