| http://www.w3.org/ns/prov#value | - W13 ! (1)where: S13 is the optogalvanic signal for the particular 13 CO2 transition; P13 is the partial pressure or molecular concentration of 13 CO2 in the gas within chamber 60; W13 is the power level of the laser beam at the wavelength corresponding to the 13 CO2 transition; and M13 is a proportionality constant which depends upon factors such as the magnitude of the optogalvanic effect for the
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