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2001 (1)
1999 (1)
1Author    M. O. Iio, A. M. Okonkwo3, M. BamidelebRequires cookie*
 Title    Factors Affecting Growth of Sulfate-Reduc- ing Bacteria Isolated from Tropical Soil  
 Abstract    Sulfate-reducing bacteria (S R B) were isolated from soils around corroded pipelines and tanks. High num­ bers of the organisms occurred in areas closest to the corroded tanks and pipelines. Morphological types cor­ responding to rod, spirilloid, vibriod and coccoid were encountered. All the organisms utilized lactate as carbon and energy source. None could grow at temperatures higher than 40 °C. All the isolates grew at 1% (w/v) NaCl while none could grow at 8% (w/v) NaCl. All the isolates grew at pH 7 .0 -7 .5 . Growth was not recorded at pH below 5.5 and above 8.0. These factors may be useful in manipulating tropical soil environments to re­ duce activities of SR B in corrosion of pipelines and tanks. 
  Reference    Z. Naturforsch. 54c, 613 (1999); received July 1/December 10 1998 
  Published    1999 
  Keywords    Sulfate-Reducing Bacteria, Lactate, pH, Temperature, Sodium Chloride 
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 TEI-XML for    default:Reihe_C/54/ZNC-1999-54c-0613_n.pdf 
 Identifier    ZNC-1999-54c-0613_n 
 Volume    54 
2Author    F. Da Silva3, L. Rycerza, M. Gaune-Escard3Requires cookie*
 Title    Thermodynamic Properties of EuC12 and the NaCl-EuCl2 System  
 Abstract    The temperature and enthalpy of the phase transition and fusion of EuC12 were determined and found to be 1014 K, 11.5 kJ mol-and 1125 K, 18.7 kJ mol-1 , respectively. Addition­ ally, the heat capacity of solid EuC12 was measured by Differential Scanning Calorimetry in the temperature range 306 -1085 K. The results were fitted to the linear equation C^ m = (68.27 + 0.0255 T/K) J m ol-1 K-1 in the temperature range 306 -900 K. Due to discrepancies in the liter­ ature on the temperature of fusion of EuC12, the determination of the NaCl-EuCl2 phase diagram was repeated. It consists of a simple eutectic equilibrium at Tem = 847 K with x(EuCl2) = 0.49. 
  Reference    Z. Naturforsch. 56a, 647—652 (2001); received August 1 2001 
  Published    2001 
  Keywords    Europium Dichloride, Sodium Chloride, Phase Diagram, Enthalpy of Transition, Heat Capacity 
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 TEI-XML for    default:Reihe_A/56/ZNA-2001-56a-0647.pdf 
 Identifier    ZNA-2001-56a-0647 
 Volume    56