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Nomogram to calculate oxygen consumption.

F B Saksena
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Abstract

A nomogram has been devised for the rapid derivation of the oxygen consumption from the expired minute volume and the fractional concentrations of expired CO2 and O2.

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Carbon DioxideHumansMathematicsOxygenOxygen ConsumptionRespirationJournal Article

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F B Saksena. 1979. Nomogram to calculate oxygen consumption.. https://doi.org/10.1136/hrt.42.3.282

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PubMed1979

Effects of manganese ions and magnesium ions on the activity of soya-bean ribulose bisphosphate carboxylase/oxygenase.

The Michaelis constants of soya-bean ribulose bisphosphate carboxylase for CO2 in the carboxylation reaction and for O2 in the oxygenation reaction depend on the nature of the bivalent cation present. In the presence of Mg2+ the Km for bicarbonate is 2.48 mM, and the Km for O2 is 37% (gas-phase concentration). With Mn2+ the values decrease to 0.85 mM and 1.7% respectively. For the carboxylation reaction Vmax. was 1.7 mumol/min per mg of protein with Mg2+ but only 0.29 mumol/min per mg of protein with Mn2+. For the oxygenation reaction, Vmax. values were 0.61 and 0.29 mumol/min per mg of protein respectively with Mg2+ and Mn2+.

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