Cycle, biochemical sulphur

W. G. Zumft, A. Viebrock, and H. Komer, Biochemical and Physiological Aspects of Denitrification, in The Nitrogen and Sulphur Cycles , eds. J. A. Cole and S. J. Ferguson, Cambridge University Press, Cambridge, 1988, p. 245. 

Corbett CM, Ingledew WJ (1987) Is Fe3+/Fe2+ cycling an intermediate in sulphur oxidation by Thiobacillus ferrooxidans FEMS Microbiol Eett 41 1-6 Cox JC, Boxer DH (1978) The purification and some properties of rusticyanin, a blue copper protein involved in iron (II) oxidation from Thiobacillus ferro-oxidans. Biochem J 174 497-502... 

Any change in enviromnental conditions such as light, temperature, water and nutrient availability may modulate the photochemical reactions of photosynthesis to a different extent than the biochemical reactions involved in carbon reduction cycle, photorespiration, and nitrogen and sulphur assimilation. Consequently, these environmental changes will modulate excitation pressure. Excitation pressure reflects an imbalance between energy absorbed through photochemistry and energy utilized... 

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