Isotopic Exchange Reaction Between Heavy Oxygen and Carbon Dioxide on Silver Catalyst
نویسندگان
چکیده
منابع مشابه
Oxygen isotopic composition of carbon dioxide in the middle atmosphere.
The isotopic composition of long-lived trace molecules provides a window into atmospheric transport and chemistry. Carbon dioxide is a particularly powerful tracer, because its abundance remains >100 parts per million by volume (ppmv) in the mesosphere. Here, we successfully reproduce the isotopic composition of CO(2) in the middle atmosphere, which has not been previously reported. The mass-in...
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We propose a novel mechanism for isotopic exchange between CO2 and O3 via O(1D) + CO2 --> CO3* followed by CO3* --> CO2 + O(3P). A one-dimensional model calculation shows that this mechanism can account for the enrichment in 18O in the stratospheric CO2 observed by Gamo et al. [1989], using the heavy O3 profile observed by Mauersberger [1981]. The implications of this mechanism for other stra...
متن کاملThe interrelationship between FIO 2 and the gas exchange ratio in the oxygen-carbon dioxide diagram.
The gas exchange ratio (R) represents the ratio of carbon dioxide output to oxygen uptake by the lungs. In the steady state it also represents the ratio of carbon dioxide produced by the tissues to tissue oxygen consumption—the RQ. When this exchange is presented on an oxygen/carbon dioxide diagram (Rahn and Fenn, 1955) it is plotted in terms of fractional concentrations (or tensions) to produc...
متن کاملA modeling investigation of canopy-air oxygen isotopic exchange of water vapor and carbon dioxide in a soybean field
[1] The oxygen isotopes of CO2 and H2O ( O-CO2 and O-H2O) provide unique information regarding the contribution of terrestrial vegetation to the global CO2 and H2O cycles. In this paper, a simple isotopic land surface model was used to investigate processes controlling the isotopic exchange of O-H2O and O-CO2 between a soybean ecosystem and the atmosphere. We included in a standard land surface...
متن کاملEffect of silver ion, carbon dioxide, and oxygen on ethylene action and metabolism.
The relationship between ethylene action and metabolism was investigated in the etiolated pea seedling (Pisum sativum L. cv. Alaska) by inhibiting ethylene action with Ag(+), high CO(2), and low O(2) and then determining if ethylene metabolism was inhibited in a similar manner. Ag(+) (100 milligrams per liter) was clearly the most potent antiethylene treatment. Ag(+) pretreatment inhibited the ...
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ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1955
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.28.532