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  • 11
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Molecular Biology 170 (1983), S. 271-285 
    ISSN: 0022-2836
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 12
    ISSN: 1434-601X
    Keywords: PACS. 27.40.+z 39 ?A? 58 – 21.10.Dr Binding energies and masses – 23.50.+z Decay by proton emission – 25.70.Mn Projectile and target fragmentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Decay studies of very neutron-deficient nuclei ranging from 39Ti to 49Ni have been performed during a projectile fragmentation experiment at the GANIL/LISE3 separator. For all nuclei studied in this work, 39, 40Ti, 42, 43Cr, 46Mn, 45, 46, 47Fe and 49Ni, half-lives and decay spectra have been measured. In a few cases, γ coincidence measurements helped to successfully identify the initial and final states of transitions. In these cases, partial decay scheme are proposed. For the most exotic isotopes, 39Ti, 42Cr, 45Fe and 49Ni, which are candidates for two-proton radioactivity from the ground state, no clear evidence of this process is seen in our spectra and we conclude rather on a delayed particle decay.
    Type of Medium: Electronic Resource
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  • 13
    ISSN: 1573-2932
    Keywords: sediments ; metals ; Thiobacilli ; T. ferrooxidans ; biological solubilization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Biological solubilization of metals in highly contaminated sediments (Lachine Canal, Montreal, P.Q., Canada) was tested in 500 mL batches. The biological process uses the leaching capacity of Thiobacilli. Batch experiments were performed to determine the influence of initial pH, the percentage of inoculum, and the addition of nitrogen and phosphate on the efficiency of the process. Similar metal recoveries were obtained at either of the initial pH values (pH 4.0 and pH 4.5). The addition of 20% inoculum (v/v) appears to result in acceptable yields over a short time period (24–48 hours). Solubilization of Cu is strongly correlated with the presence of bacteria (r2 increase with time up to 0.90 after 53h). In the case of Zn (within first 6 hours) and Pb (at the beginning), the chemical environment appears to be the main factor controlling solubilization of these elements (r2 up to 0.99). The addition of nutrients had no affect on the production of Thiobacilli, but the addition of NH4 reduced the solubilization of Zn, Pb (r2 up to 0.90) and at the beginning, the solubilization of Cu (r2=0.67). While the addition of PO4 3− diminished the solubilization of Zn, Pb and Cu (r2 up to 0.96). Upon addition of substrate (FeSO4.7H2O), the growth of Thiobacilli already present in the sediments is favored. The application of this process to sediments appears feasible, as Zn and Cu levels were at acceptable levels following treatment. Further studies are necessary to improve the removal of Pb.
    Type of Medium: Electronic Resource
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  • 14
    ISSN: 1573-2932
    Keywords: sediments ; metals ; Thiobacilli ; T. ferrooxidans ; biological solubilization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Biological solubilization of metals in highly contaminated sediments (Lachine Canal, Montreal, P.Q., Canada) was tested in 500 mL batches. The biological process uses the leaching capacity of Thiobacilli. Batch experiments were performed to determine the influence of initial pH, the percentage of inoculum, and the addition of nitrogen and phosphate on the efficiency of the process. Similar metal recoveries were obtained at either of the initial pH values (pH 4.0 and pH 4.5). The addition of 20% inoculum (v/v) appears to result in acceptable yields over a short time period (24–48 hours). Solubilization of Cu is strongly correlated with the presence of bacteria (r2 increase with time up to 0.90 after 53h). In the case of Zn (within first 6 hours) and Pb (at the beginning), the chemical environment appears to be the main factor controlling solubilization of these elements (r2 up to 0.99). The addition of nutrients had no affect on the production of Thiobacilli, but the addition of NH4 reduced the solubilization of Zn, Pb (r2 up to 0.90) and at the beginning, the solubilization of Cu (r2=0.67). While the addition of PO4 3- diminished the solubilization of Zn, Pb and Cu (r2 up to 0.96). Upon addition of substrate (FeSO 4.7H2), the growth of Thiobacilli already present in the sediments is favored. The application of this process to sediments appears feasible, as Zn and Cu levels were at acceptable levels following treatment. Further studies are necessary to improve the removal of Pb.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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