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  • 1
    Electronic Resource
    Electronic Resource
    Characterization of a Bench-Scale System for Studying the Biodegradation of Organic Solid Wastes (1995)
    s.l. : American Chemical Society
    Biotechnology progress 11 (1995), S. 443-451 
    Details
    ISSN: 1520-6033
    Source: ACS Legacy Archives
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bp00034a012
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  • 2
    Electronic Resource
    Electronic Resource
    Environmental Analysis of Iron-Precipitating Bacteria in Ground Water and Wells (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water monitoring & remediation 5 (1985), S. 0 
    Details
    ISSN: 1745-6592
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Iron-precipitating bacteria are frequently cited as being involved in economically serious well and aquifer degradation that may also have a public health impact. Quantifying the populations of the iron-precipitating bacteria present in ground water is a complex problem not yet resolved. A survey of historical and modern environmental literature provides numerous descriptions of iron bacteria in aquifers and wells, along with physicochemical data collected during bacterial sampling. These data are not conclusively linked with iron bacteria occurrence. Iron bacteria is a concept encompassing many genera and species of bacteria with varying morphology and physiology. Methods to detect bacteria and to quantify bacterial biomass in aquifers are being developed, but representative sampling remains a problem. Predictive analysis of iron bacterial growth awaits additional physiological and sampling research.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6592.1985.tb00937.x
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  • 3
    Electronic Resource
    Electronic Resource
    Microbiological Analysis of Iron-Related Biofouling in Water Wells and a Flow-Cell Apparatus for Field and Laboratory Investigations (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 31 (1993), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: A flow-cell assembly was constructed to collect biofilm samples on glass slides in an effort to monitor Fe-precipitating microorganisms in water wells. The flow-cell was used with a once-flow-through connection to municipal-water wells which had previous histories of Fe-related precipitation and biofouling problems. Microscopic observations of biofilms attached to glass slides confirmed the presence of stalked and sheathed bacteria believed to be involved in Fe (III)-precipitation. Scanning electron microscopy confirmed that biofilm samples contained Gallionella-type morphological features composed of helical, intertwisted stalks. Attempts to recover these organisms with cultural methods were unsuccessful. For monitoring Fe-precipitating microorganisms, a differential solid medium was developed from the general-purpose heterotrophic platecount medium (R2A) by incorporating ferric ammonium citrate in the formulation. Organisms capable of using citrate in the modified medium yielded rust-colored colonies due to the formation of Fe (III)-precipitates. These Fe-precipitating bacteria did not possess stalks, sheaths, or other appendages, and their presence could not be predicted from microscopic examination of the sample materials. Optical measurement of biofilm thickness was deemed unreliable because of large variation in the thickness of Fe(III)-precipitation and associated bacterial attachment. Fe(III)-precipitates were identified as ferrihydrite, a poorly crystalline Fe(III)-oxide. Laboratory studies with amended well-water samples recirculating through a flow-cell were used to enrich for organisms involved in biofouling communities. These experiments yielded methylotrophic organisms capable of growing with methanol and methylamine, and they were classified as Hyphomicrobium spp.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1993.tb00872.x
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  • 4
    Electronic Resource
    Electronic Resource
    Fimbriation in Thiobacillus A2 (1978)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 3 (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.tb01917.x
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  • 5
    Electronic Resource
    Electronic Resource
    Detection and identification of substituted phenols as intermediates of concurrent bacterial degradation of the phenoxy herbicides MCPP and 2,4-D (1991)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 79 (1991), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The concurrent bacterial degradation of 2-(2-methyl-4-chlorophenoxy) propionic acid and 2,4-dichlorophenoxyacetic acid was studied using a stirred tank reactor and a bacterial culture which had been originally derived by enrichment with MCPP. High pressure liquid chromatographic methodology was used to measure both herbicides and it also resolved the corresponding phenols as intermediates, i.e., 2-methyl-4-chlorophenol and 2,4-dichlorophenol. Gas chromatography-mass spectrometry was used to verify the intermediates. UV scans of spent cultures showed that the wavelength of maximum absorption shifted from 282 nm to 280 nm toward the end of incubation, but the characteristic peaks of maximum absorption of these compounds could not be used resolved because of the overlap.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1991.tb04519.x
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  • 6
    Electronic Resource
    Electronic Resource
    Adenylate energy charge in chemoorganotrophic Thiobacillus ferrooxidans KG-4 (1979)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 6 (1979), 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.1574-6968.1979.tb04274.x
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  • 7
    Electronic Resource
    Electronic Resource
    Survival of Legionella pneumophila under different disinfectant and physical conditions (1986)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 33 (1986), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Legionella pneumophila occurring in drinking water was subjected to environmental stress through holding tests at ambient and elevated temperatures and by chemical disinfection. The bacterium in its native environment was more resistant to adverse conditions, as compared with laboratory-grown organisms. Of the several chemical disinfectants acceptable to drinking water treatment and tested for Legionella inactivation, ozonation was the most efficient method. The C·t′ products indicated that free chlorine was superior to mono- and dichloramines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1986.tb01202.x
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  • 8
    Electronic Resource
    Electronic Resource
    Oxygen uptake activity by Nitrobacter spp. in the presence of metal ions and sulfooxyanions (1985)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 28 (1985), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Several metal ions inhibited the oxygen uptake activity of Nitrobacter agilis, but their effects on the kinetic parameters of nitrite oxidation were mixed. Growth of Nitrobacter winogradskyi was inhibited by persulfate (〉0.1 mM), tetrathionate (〉0.5 mM), and trithionate (〉5 mM). Oxygen uptake activity was, however, relatively insensitive to persulfate and tetrathionate ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1985.tb00754.x
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  • 9
    Electronic Resource
    Electronic Resource
    Dechlorination and spectral changes associated with bacterial degradation of 2-(2-methyl-4-chlorophenoxy)propionic acid (1991)
    Springer
    Journal of industrial microbiology and biotechnology 7 (1991), S. 137-145 
    Details
    ISSN: 1476-5535
    Keywords: Phenoxyherbicide ; Mecoprop degradation ; Biodegradation ; Mixed cultures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The bacterial degradation of mecoprop (2-(2-methyl-4-chlorophenoxy)propionic acid) was studied using a mixed culture under aerobic conditions. The release of chlorine from mecoprop indicated incomplete degradation (75%), which did not proceed to completion upon extended incubation. The UV absorbance initially increased and this was associated with spectral distortion of the shoulder and trough regions and a slight shift in the maximum wavelength of absorption. GC-MS analysis indicated that 4-chloro-2-methylphenol was an intermediate in the degradative pathway of mecoprop. The GC-MS data also suggested the formation of other phenolic compounds with repositioned chloro-and methylgroups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01576076
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  • 10
    Electronic Resource
    Electronic Resource
    Degradation of 2,4-dichlorophenoxyacetic acid by mixed cultures of bacteria (1990)
    Springer
    Journal of industrial microbiology and biotechnology 6 (1990), S. 275-278 
    Details
    ISSN: 1476-5535
    Keywords: Phenoxy herbicide ; 2,4-Dichlorophenoxyacetic acid ; 2,4-Dichlorophenol ; Biodegradation ; Mixed culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary We explored the feasibility of using mixed cultures for herbicide degradation, with the ultimate aim of application for effluent treatment. The present study reports on mixed cultures which were developed to grow aerobically with 2,4-dichlorophenoxyacetic acid (2,4-D) as the sole carbon substrate. Degradation of 2,4-D was verified by HPLC and UV-spectroscopic analysis of the residual 2,4-D concentration in the test cultures. Cultures that were initially developed with 2,4-D also grew readily with glucose, but the degradation of 2,4-D was effectively prevented under mixed substrate conditions. Mamor intermediates or metabolites resulting from 2,4-D degradation were not detected with the HPLC methodology except 2,4-dichlorophenol which appeared to accumulate transiently in the growth medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01575873
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