Baas-Becking

This topic has a long history of research (Harrison and Aiyer, 1920 Sturgis, 1936 Pearsall and Mortimer, 1939 Shioiri, 1943 De Gee, 1950 Takai, 1952 Ponnamperuma, 1955 Baas-Becking et al., 1960 Jeffrey, 1961 Patrick, 1966 Ponnamperuma, 1972 Yu, 1985 Kyuma, 2003). The following factors result in conditions differing from those in simple aquatic systems ... 

Baas-Becking LGM, Kapala IR, Moore D. 1960. Limits of the namral environment in terms of pH and oxidation-reduction potentials. Journal of Geology 68 243-284. 

Figure 835 Mean Eh-pH values for various types of seawaters. A = normal oceanic waters B = oxidized surface waters C = euxinic basins D = eutrophic waters. Dashed line field of natural waters according to Baas Becking et al. (1960).

Baas-Becking, L G M, Historical notes on salt and salt-manufacture, Sci... 

For the reduction of Pu02(0H)2 to Pu(OH)4, if Eh of the solution is less than +0.51 minus 0.059 pH, the Pu(OH)4, is the stable species. Pu(OH)3 cannot exist as a solid form in equilibrium with water because if Eh becomes less than zero minus 0.059 pH, water would be reduced to hydrogen. The pentavalent hydroxide form, PuQ2(OH), is unstable in both acidic and basic aqueous solutions (21) and converts to either the hexavalent or the tetra or trivalent forms because of its E°. Thus, if Eh is greater than 0.51 — 0.059 pH, PuC OHJa will be the stable form, while below this Eh Pu(OH)4 will be, these being the only stable plutonium hydroxides likely to be found in equilibrium with water. The question remains as to the likely Eh to be encountered in natural waters or even under laboratory conditions. Baas Becking, Kaplan, and Moore (1) have collected many reports of Eh values in natural waters. In an... 

Other early examples include the 1931 discussion of plant fibres and tendon proteins by Baas-Becking and Galliher [5] who saw no evidence for ... 

Baas-Becking LGM, Galliher EW (1931) Wall structure and mineralization in corraline algae. J Phys Chem 35 467-479... 

Figure 5.13. Relationship between pH and Eh for soils (from Baas Becking et al., 1960, with permission).

L. G. M. Baas Becking, Geobiologie of Inleiding to de Milieukunde, van Stockum Zoon, 1934. 

The study of sulfur diagenesis has a long history. Scientists have long accepted that microorganisms play a major role in geochemical sulfur transformations (Baas Becking, 1925). They also recognized at an earlier time that removal of sulfate occurs in the pore waters of marine mud (Murry, 1895). Subsequent work established that depletion of sulfate from marine pore water is a... 

Baas Becking L. G. M. (1934) Geobiology. Stockum Zoon, NV, The Netherlands, 263pp. 

Baas Becking Geobiological Laboratory, P.O. Box 378, Canberra City, A.C.T. 2601 (Australia)... 

The Baas Becking Laboratory is supported by the Commonwealth Scientific and Industrial Research Organization, the Bureau of Mineral Resources and the Australian Mineral Industries Research Association, Ltd. We extend our appreciation to Mrs. V.M. Barhatov for the preparation of illustrations. 

Baas Becking, L.G.M., Ferguson Wood, E.J. and Kaplan, I.R., 1956. Biological processes in the estuarine environment, VIII. Iron bacteria as gradient organisms. K. N. Akad. Wet. Amsterdam. Afd. Natuurk., Proc. Ser. C Biol. Med. Sci., 59 398—407. 

Numerous laboratory experiments attest to the feasibility of biogenic formation of sulfides from metals other than iron. Miller (1950b), using sulfate-reducing bacteria, demonstrated the formation of sulfides of antimony, bismuth, cobalt, cadmium, nickel, lead, zinc and iron. Baas Becking and Moore... 

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