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  • 1
    Electronic Resource
    Electronic Resource
    Transfemoral Plug Closure of Patent Ductus Arteriosus: Experiences at Osaka Prefectural Hospital (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of interventional cardiology 4 (1991), S. 0 
    Details
    ISSN: 1540-8183
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Transfemoral plug closure of PDA (patent ductus arteriosus), which was originally introduced by Porstmann in 1968, was successful in 73 of 74 consecutive patients at Osaka Prefectural Hospital. Some instrumental and technical modifications were made. There has been no mortality, and no dis-lodgment of the plug occurred after the modified plug with a barbed head was used although a major complication during the procedure was the dislodgment of the plug into the aorta, which occurred early in three cases. There was no recurrence of shunting or any other complications in the long-term follow-up studies. For the patient with a simple isolated PDA over 3 years of age, the catheter technique is considered to be the method of choice to close the ductus. (J Interven Cardiol 1991; 4:295–300)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8183.1991.tb00811.x
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  • 2
    Electronic Resource
    Electronic Resource
    Bioleaching of pyrite by acidophilic thermophile Acidianus brierleyi (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 48 (1995), S. 592-600 
    Details
    ISSN: 0006-3592
    Keywords: Acidianus brierleyi ; pyrite ; bioleaching ; acidophilic thermophile ; metal recovery ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The kinetics of bioleaching of pyrite (FeS2) by the acidophilic thermophilic bacterium Acidianus brierleyi was studied in a well-mixed batch reactor. Experiments were done at 65°C and pH 1.5 on adsorption of A. brierleyi onto pyrite particles, liquid-phase oxidation of ferrous iron by A. brierleyi, and microbial leaching of pyrite. The adsorption of A. brierleyi was a fast process; equilibrium was attained within the first 30 min of exposure to pyrite. The adsorption equilibrium data were well correlated with the Langmuir isotherm. The oxidation of ferrous iron was markedly accelerated in the presence of A. brierleyi, and the growth yield on ferrous iron was determined. The bioleaching of pyrite by A. brierleyi was found to take place with a direct attack by adsorbed cells on the surface of pyrite, the chemical leaching of pyrite by ferric iron being insignificant. Rate data collected under a wide variety of operating variables were analyzed to determine kinetic and stoichiometric parameters for the microbial pyrite leaching. The specific growth rate on pyrite for A. brierleyi was about four times that for the mesophilic bacterium, Thiobacillus ferrooxidans, whereas the growth yields on pyrite for the two microbes were approximately equal to one another in magnitude. A comparison of A. brierleyi with T. ferrooxidans for pyrite leachability demonstrated the thermophile to be much more effective. © 1995 John Wiley & Sons, Inc.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260480606
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of yeast extract supplementation in leach solution on bioleaching rate of pyrite by acidophilic thermophile Acidianus brierleyi (1998)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 58 (1998), S. 663-667 
    Details
    ISSN: 0006-3592
    Keywords: Acidianus brierleyi ; pyrite ; bioleaching ; acidophilic thermophile ; yeast extract ; organic supplement ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The bioleaching rate of pyrite (FeS2) by the acidophilic thermophile Acidianus brierleyi was studied at 65°C and pH 1.5 with leach solutions supplemented with yeast extract. In the absence of yeast extract supplementation, A. brierleyi could grow autotrophically on pyrite, and the leaching percentage of pyrite particles (25-44 μm) reached 25% for 7 d. The bacterial growth and consequent pyrite oxidation were enhanced by the addition of yeast extract between 0.005 and 0.25% w/v: the pyrite particles were completely solubilized within 6 d. The bioleaching rate was enhanced by a factor of 1.5 when the yeast extract concentration was changed from 0.005 to 0.05% w/v. However, there was only a slight effect on the leaching rate at the yeast extract concentrations of 0.05 to 0.25% w/v, suggesting that the organic supplement level was in large excess in the pyrite bioleaching. © 1998 John Wiley & Sons, Inc. Biotechnol Bioeng 58: 663-667, 1998.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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