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  • Ectocarpus siliculosus  (1)
  • Structure, structural phase transitions, mechanical properties, defects  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Cadmium adsorption by non-living biomass of the semi-macroscopic brown alga,Ectocarpus siliculosus, grown in axenic mass culture and localisation of the adsorbed Cd by transmission electron microscopy (1994)
    Springer
    Journal of applied phycology 6 (1994), S. 479-487 
    Details
    ISSN: 1573-5176
    Keywords: cadmium adsorption ; Ectocarpus siliculosus ; growth conditions ; adsorption parameters ; regeneration ; electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Non-living, freeze-dried material of the brown algaEctocarpus siliculosus (Phaeophyceae) demonstrated high equilibrium uptake of Cd from aqueous solutions (Fehrmann & Pohl, 1993). The alga was grown in 250-L photobioreactors under various growth conditions (light, salinity and nutrient concentrations) in order to obtain larger quantities of biomass and to improve its Cd adsorption capacity. To derive further knowledge on the biosorbant phenomenon different adsorption parameters such as pH for the sorption process and kinetics of Cd adsorption were tested. The maximum adsorption capacity of the freeze-dried biomass exceeded 41 mg Cd per g biomass. After repeated addition of low Cd concentrations the maximum adsorption capacity was lower (31.4 mg Cd per g biomass). In comparison with other adsorbing materials (activated carbon, silica gel, siliceous earth)E. siliculosus showed significantly higher adsorption capacity. Desorption of deposited Cd with 0.1 M HCl resulted in no changes of the adsorption capacity through five subsequent adsorption-/desorption-cycles. Hence, driedE. siliculosus appears to be an efficient material for the elimination of Cd from industrial waste water. Transmission electron microscopic investigations showed an electron dense area in the outer surface layers of the cell wall after Cd adsorption indicating the most likely location of Cd fixation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182402
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    Paper (German National Licenses)
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  • 2
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    Dislocations near elastic instability in high-pressure body-centered-cubic magnesium (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-02-17
    Description: Author(s): I. S. Winter, M. Poschmann, T. Tsuru, and D. C. Chrzan At high pressure, Mg is expected to transform to the body-centered-cubic (BCC) phase. We use density functional theory to explore the structure of 〈 111 〉 -type dislocation cores in BCC Mg as a function of pressure. As the pressure is reduced from the region of absolute stability for the BCC phase, the… [Phys. Rev. B 95, 064107] Published Thu Feb 16, 2017
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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