Carbon cycle overview

Heggie D. T., Skyring G. W., O Brien, Reimers C., Herczeg A., Moriarty D. J. W., Burnett W. C., and Milnes A. R. (1990) Organic carbon cycling and modern phosphorite formation on the east Australian continental margin an overview. In Phosphorite Research and Development. Geol. Soc. Spec. Publ. 52 (eds. A. G. J. Notholt and I. Jarvis), pp. 87-117. 

In describing the natural carbon cycle, it will be useful to commence with a characterization of the major reservoirs. Table 11-1 presents an overview. 

Table 11-6. Overview on Carbon Cycles Involving Atmospheric C02, and the Associated Turnover Times in the Atmosphere...

Atmospheric Input of Pollutants. Carbon Cycle. Carbon Dioxide (CO2) Cycle. Elemental Distribution Overview. Long-Term Tracer... 

Marine scientists tend to view the ocean carbon cycle from vantage points rooted in distinct fields of research. For example, analytical chemists and photochemists tend to focus on carbon analysis, physical chemists on aggregation, and biologists on the reactivity of colloids. So, by taking an integrated overview... 

Berner, R. A. (2003) Overview. The long-term carbon cycle, fossil fuels and atmospheric composition. Nature 426, 323-326... 

FIGURE 22-9 Overview of amino acid biosynthesis. The carbon skeleton precursors derive from three sources glycolysis (pink), the citric acid cycle (blue), and the pentose phosphate pathway (purple). 

Seitzinger, S. P., Harrison, J. A., Dumont, E., Beusen, A. H. W., and Bouwman, A. F. (2005). Sources and delivery of carbon, nitrogen and phosphorous to the coastal zone An overview of global nutrient export from watersheds (NEWS) models and their apphcation. Global Biogeochem. Cycles 19 (4), GB4S01. 

Figure 17.2. Overview of the Citric Acid Cycle. The citric acid cycle oxidizes two-carbon units, producing two molecules of CO2, one molecule of GTP, and high-energy electrons in the form of NADH and FADH2.

The abundant chemistry of Ni(CO>4 under reductive reaction conditions leading to the formation of dinuclear nickel complexes or even to nickel clusters suggests the involvement of higher aggregates, however. An overview of the reactivity of nickel complexes, and of Ni(CO)4 in particular, is given in a series of excellent reviews by Jolly [13]. There seems to be evidence of an autocatalytic cycle for the formation of the active catalyst [14]. Parallel to this, the water-gas shift reaction (eq. (5)) occurs, resulting in the formation of carbon dioxide and hydrogen, which is known to form metal hydrides in the presence of metal carbonyls [15]. 

An overview of carbon and sulphur cycling in marine sediments... 

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