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  • 1
    Electronic Resource
    Electronic Resource
    Biological oxidation of nitric oxide in a humisol (1997)
    Springer
    Biology and fertility of soils 24 (1997), S. 294-300 
    Details
    ISSN: 1432-0789
    Keywords: Key words Humisol ; Nitrate ; Nitric oxide ; Nitrite ; Nitrogen dioxide ; Acetylene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Consumption of nitric oxide (NO) in a humisol was studied at 0.1–2 ppmv NO, a range representative of NO concentrations in ammonium-fertilized soil. Denitrification was not a major sink for NO. The principal NO-consuming reaction was a biological oxidation, leading ultimately to nitrate (NO3 –). Nitrogen dioxide (NO2) and nitrite (NO2 –) may have been intermediates in this pathway. An abiological reaction accounted for about 25% of the NO-consuming activity in soil at 90% H2O (d.w.) and 25oC, but contributed relatively more to total NO consumption at higher temperatures. Biological NO-consuming activity was highest at 25oC, while the abiological activity increased exponentially with temperature. The product of the abiological reaction was neither NO3 –, NO2 –, nor nitrous oxide (N2O), and the reaction did not require O2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050246
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  • 2
    Electronic Resource
    Electronic Resource
    Isolation, characterization, and nitrification potential of a methylotroph and two heterotrophic bacteria from a consortium showing methane-dependent nitrification (1989)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 62 (1989), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract A methanotrophic nitrifying consortium was previously obtained from a humisol which showed CH4-dependent nitrification. Although the methanotroph could not be obtained in pure culture, three other members of the consortium have been isolated: An obligately methylotrophic Methylobacillus (Is-1) which grows only on CH3OH and does not nitrify; a Pseudomonas (Is-2) which grows on Is-1 culture filtrate and produces NO2−, NO3− and N2O from NH2OH, and NO3− from NO2−; and a second Pseudomonas (Is-3) which produces NO3− from NH4+ or NO2−, and N2O from NH2OH. A model is proposed for the trophic relations and nitrogen transformations in the consortium which may apply to some natural systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1989.tb03392.x
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  • 3
    Electronic Resource
    Electronic Resource
    Inhibition by acetylene of ammonia oxidation in Nitrosomonas europaea (1978)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 4 (1978), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1978.tb02889.x
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  • 4
    Electronic Resource
    Electronic Resource
    Reduction of nitrous oxide by a soil Cytophaga in the presence of acetylene and sulfide (1984)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 23 (1984), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract A denitrifying Cytophaga was isolated from soil enriched by anaerobic incubation with glucose, sulfide (S2−), nitrous oxide (N2O), and acetylene (C2H2). Such soil enrichments and pure cultures of the isolated Cytophaga reduced N2O rapidly even in the presence of a normally inhibitory concentration of C2H2 (4 kPa) providing S2− was present (8 μmol/g soil or 0.4 μmol/ml culture). Since C2H2 inhibition of the reduction of N2O is used as a tool in the assay of denitrification, the presence in large numbers of such a Cytophaga may influence the effectiveness of this assay especially in sulfidic environments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1984.tb01056.x
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  • 5
    Electronic Resource
    Electronic Resource
    Methane-dependent nitrate production by a microbial consortium enriched from a cultivated humisol (1989)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 62 (1989), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract A consortium was enriched from a humisol incubated with 3.6 kPa CH4 and NH4+. This consortium oxidized NH4+ to NO2− and NO3− (NO3−/NO2− ratio about 20) with smaller amounts of N2O. This oxidation stopped in the stationary phase after depletion of CH4. CH3OH or CO2 did not support oxidation. Growth and resting cell experiments suggested that nitrification was associated with methanotrophic activity and that chemoautotrophic nitrifiers were absent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1989.tb03391.x
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  • 6
    Electronic Resource
    Electronic Resource
    Growth of methanotrophs in methane and oxygen counter gradients (1995)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 126 (1995), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract A gel-stabilized system with counter gradients of CH4 and O2 was used to grow methanotrophs from wetland, agricultural and forest soils and lake sediment. Columns of semi-solid nitrate- or ammonium-minerai salts medium were continuously flushed at opposite ends with CH4 and O2 to create opposing concentration gradients of the two gases. Methanotrophs grew from all samples except forest soil, and were visible as thin bands after 5 to 15 days of incubation. The position of growth was CH4 and O2 concentration-dependent and occurred at the point of maximum possible CH4 oxidation, where both substrates were completely consumed. Evidence was obtained for denitrification and nitrification activities concomitant with CH4 oxidation. This approach may be useful to isolate methanotrophs with different CH4 and O2 requirements and to study their interactions with other groups of bacteria in nature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1995.tb07421.x
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  • 7
    Electronic Resource
    Electronic Resource
    Factors in Forest-Tree Litter Extracts affecting the Growth of Soil Micro-Organisms (1959)
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 1169-1169 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Rather different properties of inhibition and stimulation were observed in the following study in which newly fallen beech (Fagus grandifolia) and maple (Acer saccharum) leaves were extracted with cold water. The dried leaves were milled, homogenized with ten times their weight of cold water, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1841169a0
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  • 8
    Electronic Resource
    Electronic Resource
    Inhibition of nitrous oxide reduction by a component of Hamilton Harbour sediment (1995)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 17 (1995), S. 0 
    Details
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract: A component of Hamilton Harbour sediment prevented nitrous oxide (N2O) reduction in denitrification assays with a mixed population of endogenous bacteria and a pure culture (HH1) isolated from the sediment. A 5% (v/v) concentration of sediment in nutrient broth caused near maximum inhibition of N2O reduction. Sediment taken from a site closer to pollution sources (Site 906) was twice as inhibitory (as measured by N2O accumulation) as sediment from Site 910, further from pollution sources. N2O persistence was associated with the particulate sediment fraction only. Several heavy metals were tested at in situ concentrations, and ionic cadmium (Cd) and chromium (Cr) caused N2O accumulation. Ashed sediment did not cause N2O accumulation, but did decrease initial nitrate reduction rates with HH1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6941.1995.tb00125.x
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  • 9
    Electronic Resource
    Electronic Resource
    Nitrous oxide reductase of Flexibacter canadensis: a unique membrane-bound enzyme (1992)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 92 (1992), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The subcellular distribution of nitrous oxide reductase was studied in the gliding soil bacterium Flexibacter canadensis. Nitrous oxide reductase activity, as measured by the methyl viologen-nitrous oxide oxidoreductase assay, was associated entirely with the membrane fraction of cell-free extracts. The enzyme was liberated from the membranes with use of detergents but not by high-salt concentrations, thus implying that nitrous oxide reductase is an integral membrane protein. The nitrous oxide reductase of F. canadensis is the first reported example of a membrane-bound form of this respiratory enzyme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1992.tb05260.x
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  • 10
    Electronic Resource
    Electronic Resource
    Organic matter, heterotrophic activity, and NO· consumption in soils (1998)
    Oxford, UK : Blackwell Science Ltd
    Global change biology 4 (1998), S. 0 
    Details
    ISSN: 1365-2486
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Geography
    Notes: When the effect of water content was minimized, soil CO2 evolution and soil organic matter content were good predictors of aerobic NO. uptake rate constants across a wide range of soil types. Field manure application to a Gleysol stimulated NO. uptake rate constants and lowered NO. compensation points compared to unfertilized or NH4NO3-fertilized soil. This effect lasted for months after manure application. In a laboratory experiment, addition of manure reduced the NO. efflux associated with nitrification of NH4 Cl fertilizer, and manured soils had a greater capacity to remove NO. from polluted air. Evidence is presented that these observations result from NO. oxidation during heterotrophic microbial activity in soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2486.1998.00123.x
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