منابع مشابه
The oxygen and carbon dioxide compensation points of C3 plants: possible role in regulating atmospheric oxygen.
The O2 and CO2 compensation points (O2 and CO2) of plants in a closed system depend on the ratio of CO2 and O2 concentrations in air and in the chloroplast and the specificities of ribulose bisphosphate carboxylase/oxygenase (Rubisco). The photosynthetic O2 is defined as the atmospheric O2 level, with a given CO2 level and temperature, at which net O2 exchange is zero. In experiments with C3 pl...
متن کاملThe Carbon Cycle and Atmospheric Carbon Dioxide
Contributing Authors D. Archer, M.R. Ashmore, O. Aumont, D. Baker, M. Battle, M. Bender, L.P. Bopp, P. Bousquet, K. Caldeira, P. Ciais, P.M. Cox, W. Cramer, F. Dentener, I.G. Enting, C.B. Field, P. Friedlingstein, E.A. Holland, R.A. Houghton, J.I. House, A. Ishida, A.K. Jain, I.A. Janssens, F. Joos, T. Kaminski, C.D. Keeling, R.F. Keeling, D.W. Kicklighter, K.E. Kohfeld, W. Knorr, R. Law, T. Le...
متن کاملEvolution of Atmospheric Oxygen
changes in sea ice thickness and the relative amounts of open water on surface air temperatures through the year. Figure 2 shows that the impact on the surface air temperatures is rather small during the summer; however, during the winter, when there is a large difference between the surface temperature of ocean water and of sea ice, the impact of small changes in the area of open ocean on surf...
متن کاملSimulation of community metabolism and atmospheric carbon dioxide and oxygen concentrations in Biosphere 2
The complexity and scale of Biosphere 2 under materially closed conditions represented a unique opportunity to investigate couplings between elemental cycles and community metabolism. For this paper, simulation models were developed to explore individual biome effects on atmospheric composition and carbon cycling inside the enclosure. Results suggest soil respiration rates, light intensity, and...
متن کاملOxygen and carbon monoxide equilibria of human adult hemoglobin at atmospheric and elevated pressure.
By F. LEE RODKEY, JOHN D. O’NEAL, AND HAROLD A. COLLISON T HE FUNDAMENTAL LAW describing the competitive combination of oxygen and carbon monoxide with hemoglobin was defined by Douglas, Haldane, and Haldane’ in 1912. At equilibrium the concentration of these two gases 1)ound to hemoglobin and in the gaseous phase were related by the equation : ( COHb) X ( 02)/( O2Hb) X ( CO ) K where K is the ...
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ژورنال
عنوان ژورنال: Science
سال: 1971
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.174.4006.316