Oxygen consumption, carbon dioxide output and nitrogen excretion in cichlid fish,Oreochromis mossambicus (Peters), with special reference to swimming speed

1986 ◽  
Vol 95 (2) ◽  
pp. 215-222 ◽  
Author(s):  
N Sukumaran
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Special Reference ◽  
Swimming Speed ◽  
Cichlid Fish ◽  
Oreochromis Mossambicus ◽  
Nitrogen Excretion ◽  
Carbon Dioxide Output

scholarly journals The duration of the recovery period following strenuous muscular exercise

1933 ◽  
Vol 113 (783) ◽  
pp. 327-344 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Normal Values ◽  
Recovery Period ◽  
Oxygen Intake ◽  
Respiratory Metabolism ◽  
Carbon Dioxide Output ◽  
Steady Level ◽  
Made In

There are a variety of ways in which the duration of the recovery period after exercise can be determined. The method most frequently employed depends upon observations of the respiratory metabolism. This method has been chosen because the respiratory changes due to exercise can be followed with reasonable ease and accuracy, and because these changes are among the last of the more obvious effects of the exercise to disappear during recovery. In addition, interesting data concerning the effects of exercise on respiratory metabolism can be collected during the determination of the duration of the recovery period when this method is used. In determining the duration of the recovery period by observation of the respiratory metabolism, it is necessary to decide when the carbon dioxide output and oxygen intake have returned to their normal values and are no longer affected by the process of recovery from the exercise. This decision has been made in a variety of ways by different investigators. Some have made one or more pre-exercise determinations of the subject's basal oxygen intake and carbon dioxide output. Recovery was said to be complete when the carbon dioxide output and oxygen consumption returned to these values after exercise. Others found that the oxygen consumption did not return to the pre-exercise level within a reasonable length of time, but remained above normal for several hours. They considered that recovery was complete when the carbon dioxide output and oxygen intake returned to a steady level after exercise, even if the level was not the same as that before exercise.

Effect of Electronarcosis on Oxygen Consumption and Carbon Dioxide Output

Nature ◽  
1960 ◽  
Vol 187 (4732) ◽  
pp. 151-152
Author(s):  
JAROSLAV STRMISKA ◽  
ANTONÍN VACEK
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Carbon Dioxide Output

scholarly journals The fasting metabolism of cattle

1966 ◽  
Vol 20 (1) ◽  
pp. 103-111 ◽  
Author(s):  
K. L. Blaxter ◽  
F. W. Wainman
Keyword(s):  
Carbon Dioxide ◽  
Body Weight ◽  
Oxygen Consumption ◽  
Coefficient Of Variation ◽  
Methane Production ◽  
Carbon Dioxide Production ◽  
The Body ◽  
Nitrogen Excretion ◽  
Urinary Nitrogen Excretion ◽  
Urinary Nitrogen

1. The metabolism of seventeen steers was determined on forty-nine occasions during fasts of either 112 or 136 h duration.2. Faeces continued to be produced during fasts of up to 136 h duration at rates which were 15–20% of those noted before the fasts began.3. Carbon dioxide production and oxygen consumption fell continuously throughout with animals weighing less than 200 kg but changed little after 88 h in animals weighing more than 200 kg. Methane production was considerably reduced during fasting but did not disappear. Urinary nitrogen excretion changed very little. Of the total loss of energy from the body, the loss of protein accounted for 25%. This was unaffected by age or size of animal.4. With individual Ayrshire steers, metabolism increased during growth with body-weight raised to the power 0.68±0.05. No greater precision of estimate was obtained from logarithmic regressions of metabolism on body-weight than from linear ones.5. Seven Ayrshire steers had a mean fasting metabolism of 100±1.6 kcal/kg W0.73 24 h, eight Black cattle of the Aberdeen Angus type a fasting metabolism of 81±1.5 kcal/kg W0.73 24 h and two Ayrshire x Beef Shorthorn steers a fasting metabolism of 96±2.9 kcal/kg W0.73 24 h. Variation in the fasting metabolism of an individual steer from time to time, expressed as a coefficient of variation, was ±7.4%.6. The results are discussed in relation to interspecies generalizations about the relation between fasting metabolism and body-weight.

scholarly journals THE RESPIRATORY QUOTIENT OF FROG NERVE DURING STIMULATION

1927 ◽  
Vol 11 (2) ◽  
pp. 175-191 ◽  
Author(s):  
Wallace O. Fenn
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Diffusion Coefficients ◽  
Time Course ◽  
Oxygen Intake ◽  
Dissociation Curve ◽  
Similar Time ◽  
High Co2 ◽  
Carbon Dioxide Output ◽  
Carbon Dioxide Dissociation Curve

1. By means of a differential volumeter the increased oxygen consumption and the increased carbon dioxide output of frog nerve during and after stimulation have been observed. 2. Measurements of the R.Q. of nerve by this method are complicated by the retention of carbon dioxide. Attempts were made to avoid this (a) by studying the nerves at high CO2 tensions to make the retention small and (b) by calculating the amount of CO2 retained from the carbon dioxide dissociation curve of nerve and applying this value as a correction. 3. The results of both those methods when averaged together give an R.Q. of the excess metabolism of 1.19 and an R.Q. of the resting nerve of 0.97. 4. Observations on the time course of the gas exchange during stimulation indicate a delay in the appearance of the extra carbon dioxide output relative to the oxygen intake. 5. Very similar time curves can be calculated from the diffusion coefficients and the solubilities of the oxygen and the carbon dioxide.

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