Table 170. - Maximum Effect Of Ingestion Of Levulose On Carbon Dioxide, Oxygen, And Heat In Respiration Experiments

1Period from the time when subject finished eating to the end of the last observation, except when the increment of heat ended earlier. See tables 140 to 148 for complete observations. 2Sugar taken with juice of one lemon on this day. 3Sugar taken with juice of one-half lemon on this day. 4Same value occurs 2 1/4 to 2 1/2 hours after food. 5In cereal coffee (about 300 c.c. solution).

The experiments in which 75 grams of sugar were taken do not lend themselves so easily for comparison as the 100-gram experiments, since they were made with only two subjects. The maximum increase in carbon-dioxide production ranged from 21 per cent to 35 per cent with an average of 30 per cent, while that for oxygen consumption ranged from 5 to 13 per cent with an average of 11 per cent. The maximum increase in heat production ranged from 10 per cent to 18 per cent with an average of 15 per cent. Comparing these values with the averages found after the ingestion of 100 grams, we find a marked decrease, amounting to one-third to one-half of the increment noted in the 100-gram experiments. With all three factors the time at which the maximum effect occurred is similar to that noted with the larger amount, namely, from 45 to 60 minutes after the ingestion of the carbohydrate.

Table 171. - Maximum Effect Of Ingestion Of Sucrose On Carbon Dioxide, Oxygen, And Heat In Respiration Experiments

1Period from the time when subject finished eating to the end of the last observation, except in cases when the increment of heat ended earlier. See tables 149 to 163 for complete observations. 2Sugar taken with juice of one lemon on this day. 3Same value occurs 2 to 2 1/4 hours after food. 473 grams sugar taken with juice of one-half lemon on this day. 5In 200 grams coffee.

6In cereal coffee (about 300 c.c. solution). 7Same value occurs 2 1/4 to 2 1/2 hours after food.

Lactose

Five observations with different subjects were made after the ingestion of lactose, the amount being 100 grams in all instances. The time of observation averaged 3h23m. (See table 172.) The carbon-dioxide increment ranged from 22 to 42 per cent with an average of 27 per cent, while the oxygen maxima ranged from 4 to 18 per cent with an average of 11 per cent. The greatest increase in heat production ranged from 8 to 23 per cent with an average of 14 per cent. The maximum effect for both carbon-dioxide production and heat production occurred on the average between l 1/4 and 1 1/2 hours after the food was taken. The maximum for oxygen consumption was reached on the average 30 to 45 minutes after food.

Table 172. - Maximum Effect Of Ingestion Of 100 Grams Of Lactose On Carbon Dioxide, Oxygen, And Heat In Respiration Experiments

1Period from the time when subject finished eating to end of last observation, except in cases when the increment of heat ended earlier. See tables 164 to 168 for complete observations. 2Sugar taken with juice of one lemon on this day. 3Same value occurs l 1/4 to 1 1/2 hours after food. 4Sugar taken with juice of two-thirds lemon on this day. 5Sugar taken with juice of one-half lemon on this day. 6Same value occurs l 1/4 to 1 1/2 and 2 3/4 to 3 hours after food. 7In cereal coffee (about 300 c.c. solution).