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  • 1
    Digitale Medien
    Digitale Medien
    PRICE CONTROL IN GERMANY (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of public and cooperative economics 52 (1981), S. 0 
    Details
    ISSN: 1467-8292
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8292.1981.tb01854.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Aerobic and anaerobic ammonia oxidizing bacteria – competitors or natural partners? (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 39 (2002), S. 0 
    Details
    ISSN: 1574-6941
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: The biological nitrogen cycle is a complex interplay between many microorganisms catalyzing different reactions. For a long time, ammonia and nitrite oxidation by chemolithoautotrophic nitrifiers were thought to be restricted to oxic environments and the metabolic flexibility of these organisms seemed to be limited. The discovery of a novel pathway for anaerobic ammonia oxidation by Planctomyces (anammox) and the finding of an anoxic metabolism by ‘classical’Nitrosomonas-like organisms showed that this is no longer valid. The aim of this review is to summarize these novel findings in nitrogen conversion and to discuss the ecological importance of these processes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1574-6941.2002.tb00920.x
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  • 3
    Digitale Medien
    Digitale Medien
    Kinetics, diffusional limitation and microscale distribution of chemistry and organisms in a CANON reactor (2005)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 51 (2005), S. 0 
    Details
    ISSN: 1574-6941
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: In the Completely Autotrophic Nitrogen removal Over Nitrite (CANON) process, aerobic and anaerobic ammonia oxidizing bacteria cooperate to remove ammonia in one oxygen-limited reactor. Kinetic studies, microsensor analysis, and fluorescence in situ hybridization on CANON biomass showed a partial differentiation of processes and organisms within and among aggregates. Under normal oxygen-limited conditions (∼5 μM O2), aerobic ammonia oxidation (nitrification) was restricted to an outer shell (〈100 μm) while anaerobic ammonia oxidation (anammox) was found in the central anoxic parts. Larger type aggregates (〉500 μm) accounted for 68% of the anammox potential whereas 65% of the nitrification potential was found in the smaller aggregates (〈500 μm). Analysis with ∼5 μM O2 microsensors showed that the thickness of the activity zones varied as a function of bulk O2 and NO−2 concentrations and flow rate.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1016/j.femsec.2004.09.003
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  • 4
    Digitale Medien
    Digitale Medien
    New concepts of microbial treatment processes for the nitrogen removal in wastewater (2003)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology reviews 27 (2003), S. 0 
    Details
    ISSN: 1574-6976
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Many countries strive to reduce the emissions of nitrogen compounds (ammonia, nitrate, NOx) to the surface waters and the atmosphere. Since mainstream domestic wastewater treatment systems are usually already overloaded with ammonia, a dedicated nitrogen removal from concentrated secondary or industrial wastewaters is often more cost-effective than the disposal of such wastes to domestic wastewater treatment. The cost-effectiveness of separate treatment has increased dramatically in the past few years, since several processes for the biological removal of ammonia from concentrated waste streams have become available. Here, we review those processes that make use of new concepts in microbiology: partial nitrification, nitrifier denitrification and anaerobic ammonia oxidation (the anammox process). These processes target the removal of ammonia from gases, and ammonium-bicarbonate from concentrated wastewaters (i.e. sludge liquor and landfill leachate). The review addresses the microbiology, its consequences for their application, the current status regarding application, and the future developments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1016/S0168-6445(03)00039-1
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  • 5
    Digitale Medien
    Digitale Medien
    Nitrogen loss caused by denitrifying Nitrosomonas cells using ammonium or hydrogen as electron donors and nitrite as electron acceptor (1995)
    Springer
    Archives of microbiology 163 (1995), S. 16-20 
    Details
    ISSN: 1432-072X
    Schlagwort(e): Nitrosomonas ; Lithotrophic and mixotrophic nitrification ; Oxygen limitation ; Aerobic and anaerobic denitrification ; Nitrous oxide ; Dinitrogen Hydroxylamine ; Hydrogen ; Ammonium
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Cells of the obligately lithotrophic species Nitrosomonas europaea and Nitrosomonas eutropha were able to nitrify and denitrify at the same time when grown under oxygen limitation. In addition to oxygen, nitrite was used as an electron acceptor. The simultaneous nitrification and denitrification resulted in significant formation of the gaseous N-compounds nitrous oxide and dinitrogen, causing significant nitrogen loss. In mixed cultures of N. europaea and various chemoorganotrophic bacteria, the nitrogen loss was strongly influenced by the partners growing under oxygen limitation. Under anoxic conditions, pure cultures of N. eutropha were able to denitrify with molecular hydrogen as electron donor and nitrite as the only electron acceptor in a sulfide-reduced complex medium. The increase of cell numbers was directly coupled to nitrite reduction. Nitrous oxide and dinitrogen were the only detectable end products. In pure cultures of N. eutropha and mixed cultures of N. eutropha and Enterobacter aerogenes, ammonium and nitrite disappeared slowly at a molar ratio of about one when oxygen was absent. However, under these conditions cell growth was not measurable.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00262198
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Nitrogen loss caused by denitrifying Nitrosomonas cells using ammonium or hydrogen as electron donors and nitrite as electron acceptor (1995)
    Springer
    Archives of microbiology 163 (1995), S. 16-20 
    Details
    ISSN: 1432-072X
    Schlagwort(e): Key wordsNitrosomonas ; Lithotrophic and mixotrophic nitrification ; Oxygen limitation ; Aerobic and anaerobic denitrification ; Nitrous oxide ; Dinitrogen ; Hydroxylamine ; Hydrogen ; Ammonium
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Cells of the obligately lithotrophic species Nitrosomonas europaea and Nitrosomonas eutropha were able to nitrify and denitrify at the same time when grown under oxygen limitation. In addition to oxygen, nitrite was used as an electron acceptor. The simultaneous nitrification and denitrification resulted in significant formation of the gaseous N-compounds nitrous oxide and dinitrogen, causing significant nitrogen loss. In mixed cultures of N. europaea and various chemoorganotrophic bacteria, the nitrogen loss was strongly influenced by the partners growing under oxygen limitation. Under anoxic conditions, pure cultures of N. eutropha were able to denitrify with molecular hydrogen as electron donor and nitrite as the only electron acceptor in a sulfide-reduced complex medium. The increase of cell numbers was directly coupled to nitrite reduction. Nitrous oxide and dinitrogen were the only detectable end products. In pure cultures of N. eutropha and mixed cultures of N. eutropha and Enterobacter aerogenes, ammonium and nitrite disappeared slowly at a molar ratio of about one when oxygen was absent. However, under these conditions cell growth was not measurable.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00262198
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  • 7
    Digitale Medien
    Digitale Medien
    Anaerobic ammonia oxidation with nitrogen dioxide by Nitrosomonas eutropha (1997)
    Springer
    Archives of microbiology 167 (1997), S. 106-111 
    Details
    ISSN: 1432-072X
    Schlagwort(e): Key wordsNitrosomonas ; Anaerobic ammonia ; oxidation ; Anaerobic cell growth ; Nitrogen dioxide ; Nitric oxide ; Nitrous oxide ; Dinitrogen
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Nitrosomonas eutropha, an obligately lithoautotrophic bacterium, was able to nitrify and denitrify simultaneously under anoxic conditions when gaseous nitrogen dioxide (NO2) was supplemented to the atmosphere. In the presence of gaseous NO2, ammonia was oxidized, nitrite and nitric oxide (NO) were formed, and hydroxylamine occurred as an intermediate. Between 40 and 60% of the produced nitrite was denitrified to dinitrogen (N2). Nitrous oxide (N2O) was shown to be an intermediate of denitrification. Under an N2 atmosphere supplemented with 25 ppm NO2 and 300 ppm CO2, the amount of cell protein increased by 0.87 mg protein per mmol ammonia oxidized, and the cell number of N. eutropha increased by 5.8 × 109 cells per mmol ammonia oxidized. In addition, the ATP and NADH content increased by 4.3 μmol ATP (g protein)–1 and 6.3 μmol NADH (g protein)–1 and was about the same in both anaerobically and aerobically grown cells. Without NO2, the ATP content decreased by 0.7 μmol (g protein)–1, and the NADH content decreased by 1.2 μmol (g protein)–1. NO was shown to inhibit anaerobic ammonia oxidation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002030050422
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  • 8
    Digitale Medien
    Digitale Medien
    Rezensionen (1978)
    Springer
    Journal of consumer policy 2 (1978), S. 86-93 
    Details
    ISSN: 1573-0700
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00380378
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  • 9
    Digitale Medien
    Digitale Medien
    Book reviews (1987)
    Springer
    Journal of consumer policy 10 (1987), S. 97-104 
    Details
    ISSN: 1573-0700
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00411949
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  • 10
    Digitale Medien
    Digitale Medien
    Book reviews (1984)
    Springer
    Journal of consumer policy 7 (1984), S. 505-523 
    Details
    ISSN: 1573-0700
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00380244
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