Berndt

D. Berndt, Maintenance-Free Batteries, Research Studies Press, Taunton, UK John Wiley, New York, 1993, 1st ed., p. 40, 1997, 2nd ed, 102. 

Berndt, A. F. Marsh, R. E. (1962) The crystal structure of cyclopentadienyl manganese tricarbonyl, C5H5Mn(CO)3, Acta Crystallogr. 16,118-123. 

Greenberg PE, Stiglin LE, Finkelstein SN, Berndt ER (1993). The economic burden of depression in 1990./ Clin Psychiatry yA, 405-18. 

Berndt C, CH Lillig, M Wollenberg, E Bill, MC Mansilla, D de Mendoza, A Seidler, JD Schwenn (2004) Characterization and reconstitution of a 4Fe-4S adenyl sulfate/phosphoadenyl sulfate reductase from Bacillus subtilis. J Biol Chem 279 7850-7855. 

Chemical compositions of major elements (alkali, alkali earth elements. Si) in back-arc and midoceanic ridge hydrothermal solutions are not so different (Table 2.15). This is thought to be due to the effect of water-rock interaction. For example, Berndt et al. (1989) have shown that mQ i+ of midoceanic ridge hydrothermal fluids is controlled by anorthite-epidote equilibrium (Fig. 2.37). Figure 2.37 shows that /Mca2+/m + of back-arc hydrothermal fluids is also controlled by this equilibrium. 

Fig. 2.37. Phase diagram for Ca0-Na20 Si02-(Al203)-H20 system in equilibrium with quartz at 400°C and 400 bars. Plagioclase solid solution can be represented by the albite and anorthite fields, whereas epidote is represented by clinozoisite. Note that the clinozoisite field is adjacent to the anorthite field, suggesting that fluids with high Ca/(H+) might equilibrate with excess anorthite by replacing it with epidote. The location of the albite-anorthite-epidote equilibrium point is a function of epidote and plagioclase composition and depends on the model used for calculation of the thermodynamic properties of aqueous cations (Berndt et al., 1989).

Berndt, M.E., Seyfried, W.E. Jr. and Janeckey, D.R. (1989) Plagioclase and epidote buffering of cation ratios in midocean ridge hydrothermal fluids Experimental results in and near the supercritical region. Geochim. Cosmochim. Acta, 53, 2283-2300. 

Berndt et al. (1989) have indicated that aQ +/a + and aNa+/r H+ of midoceanic ridge hydrothermal fluids is controlled by clinozoisite, Ca-feldspar, and Na-feldspar. In addition to these assemblages, calcite is in equilibrium with fluids. Therefore, we can derive the /CO2 temperature relationship from the following equilibrium relations. 

Barne.s, H.L. and Czamanske, G.K. (1967) Solubilities and transport of ore minerals. In Barnes, H.L. (ed.). Geochemistry of Hydrothermal Ore Deposits. New York Holt, Rinehart and Win.ston, pp. 334-381. Berndt, M.E., Seyfried, W.E. Jr. and Janeckey, D.R. (1989) Plagiocla.se and epidote buffering of cation ratios in midocean ridge hydrothermal fluids Experimental results in and near the supercritical region. Geochim. Cosmochim. Acta, 53, 2283-2300. 

Berndt, W., Meier-Cabell, E., Properties of some proteins as well as acid phosphatase from green coffee, Coll, Int, Chlm, Cafes, 7, 225, 1975. (CA85 155547n)... 

---