Nitrogen temperature-dependent interaction parameters

Figure 10. Temperature-dependent interaction parameters for nitrogen, carbon dioxide, and hydrogen sulfide with water...

Valderrama, J.O. Ibrahim, A.A Cisternas, L.A. (1990). Temperature-dependent interaction parameters in cubic equations of state for nitrogen-containing mixtures. Fluid Phase Equilib, Vol.59, pp. 195-205... 

The most significant are the Zeeman (g tensor) and nitrogen hyperfine interactions. These depend somewhat on chemical structure, solvent polarity, and temperature. An assumption has been made almost universally that magnetic parameters that are found in frozen solutions may be used to describe liquid phase spectra. This assumption should be recognized and considered carefully in precise work. It may be invalid for several reasons, including (1) altered distribution of nitroxide molecular conformations,... 

Other models have been proposed which follow the outlines of the equations already discussed. Equations with parameters that vary as a function of temperature, sunlight, and nutrient concentration have been presented by Davidson and Clymer (9) and simulated by Cole (10). A set of equations which model the population of phytoplankton, zooplankton, and a species of fish in a large lake have been presented by Parker (II). The application of the techniques of phytoplankton modeling to the problem of eutrophication in rivers and estuaries has been proposed by Chen (12). The interrelations between the nitrogen cycle and the phytoplankton population in the Potomac Estuary has been investigated using a feed-forward-feed-back model of the dependent variables, which interact linearly following first order kinetics (13). 

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