Biological fixation

The chemical reactivity of coordinated N2 has been extensively studied because of its potential relevance to the catalytic and biological fixation of N2 to NH3 (p. 1035). For other recent work on the reactions of coordinated dinitrogen see refs. 41-44... [Pg.416]

Atmospheric monitoring, 23 139 Atmospheric nitrogen, biological fixation of, 11 111-112... [Pg.77]

Biological ethylene oxidation, 10 656 Biological Exposure Indices El), 21 838 Biological factors, as wastewater parameter, 25 886t Biological fixation... [Pg.102]

For a simple model of Ca cycling, where the Ca sources for the ocean are weathering of continental rocks, pore fluids in the marine environment, and ocean floor basalt (Gieskes and Lawrence 1981 Berner etal. 1983 Elderheld etal. 1999), and the primary sink is the biological fixation of Ca into sediments, the rate of change of 5 Ca (= 5sw ) of the oceans is given by ... [Pg.278]

Carbon difluoride, synthesis of, 14 127 Carbon dioxide, 43 409-431 binding constants, 43 411-412 biological fixation, reaction modeling, 43 ... [Pg.37]

Legocki. A., H. Bothe, and A. Puhler Biological Fixation of Nitrogen for Ecology arid Sustainable Agriculture, Springer-Verlag, Inc., New Yoik. NY, 1997. [Pg.1086]

Enhanced biological fixation [10] has great potential, especially if an aquatic biomass can be created that is capable of producing chemicals and fuels this topic... [Pg.10]

Such conversion of Ci into organics can occur either under natural conditions-that is, via the uptake of C02 from the atmosphere, where it reaches a concentration equal to 0.038% (v/v)-or under enhanced or industrial conditions, that are much different from natural conditions. Typical examples of the enhanced biological fixation are (i) the cultivation of terrestrial biomass (ornamental plants, some vegetables) in greenhouses under a C02 concentration in the gas phase of approximately 600 ppm and (ii) the farming of aquatic biomass by dissolving C02 in water or under a gas-phase concentration up to 5-10%-that is, 130- to 260-fold the natural concentration. [Pg.335]

Chatt, J. (1980). Chemistry relevant to the biological fixation of nitrogen. Proc. Phytochem. Soc. Europe Symph. Ser. 18, 1-18. [Pg.215]

Nitrogenases (EC 1.18.6.1) are the enzymes responsible for the biological fixation of atmospheric dinitrogen to ammonia. These enzymes are found only in bacteria, although some of the bacteria form symbioses with plants. [Pg.153]

There are four ways in which the biological fixation of carbon can affect atmosphere-ocean C02 exchange ... [Pg.166]

Terrestrial-Atmospheric 1. Natural biological fixation (pre-agriculture) 110 90-130 90-170... [Pg.301]

Fixation due to planting of nitrogen-fixing plants 3. Total biological fixation (1+2 above) 150 43 ... [Pg.301]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...