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  • 1
    Electronic Resource
    Electronic Resource
    Microbiological processes in urban wastes management (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 95-95 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01975943
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  • 2
    Electronic Resource
    Electronic Resource
    Comparative tracing experiments in a porous aquifer using bacteriophages and fluorescent dye on a test field located at Wilerwald (Switzerland) and simultaneously surveyed in detail on a local scale by radio-magneto-tellury (12–240 kHz) (1994)
    Springer
    Environmental geology 23 (1994), S. 192-200 
    Details
    ISSN: 1432-0495
    Keywords: Groundwater ; Porous aquifer ; Heterogeneous ; Biological tracers ; Bacteriophage ; Fluorescent dye ; Naphthionate ; Electromagnetic survey
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract This article presents an example of a tracing experiment using two bacteriophages, T7 and f1, and a fluorescent dye (naphthionate), in a saturated porous environment. The test field was equipped with an injection borehole and 22 sampling piezometers set in three concentric half-circles. The distribution of permeabilities and the thickness of the aquifer were indirectly determined by Radio-Magneto-Tellury (RMT, 12–240 kHz). The results reveal a good correlation between the distribution of permeabilities obtained by RMT and the breakthrough curves and speed of migration of all three tracers. The restitution levels are far superior (by two to three orders of magnitude) in the more permeable zones, as opposed to those observed in th piezometers situated in less permeable areas. The speed of migration of the biological tracers is much greater than that of the naphthionate. In the most extreme case, the T7 bacteriophage migrated about 3.15 times faster than the chemical solution. These results indicate that bacteriophages are able to travel considerable distances along permeable gravel channels. They may be used as biological tracers and as models for the migration of pathogenic viruses. The simultaneous use of tracing techniques and appropriate geophysical methods leads to a better knowledge of the hydrogeological parameters of the underground terrain. This combination allows for a better interpretation both of the speeds of migration and of the maximal concentrations of the tracers, and thus considerably increases the interpretability of hydrogeological impact studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00771788
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of an Elevated Atmospheric CO2 Content on Soil and Rhizosphere Bacterial Communities Beneath Lolium perenne and Trifolium repens under Field Conditions (1999)
    Springer
    Microbial ecology 38 (1999), S. 39-49 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The increase in atmospheric CO2 content alters C3 plant photosynthetic rate, leading to changes in rhizodeposition and other root activities. This may influence the activity, the biomass, and the structure of soil and rhizosphere microbial communities and therefore the nutrient cycling rates and the plant growth. The present paper focuses on bacterial numbers and on community structure. The rhizospheres of two grassland plants, Lolium perenne (ryegrass) and Trifolium repens (white clover), were divided into three fractions: the bulk soil, the rhizospheric soil, and the rhizoplane–endorhizosphere. The elevated atmospheric CO2 content increased the most probable numbers of heterotrophic bacteria in the rhizosphere of L. perenne. However, this effect lasted only at the beginning of the vegetation period for T. repens. Community structure was assessed after isolation of DNA, PCR amplification, and construction of cloned 16S rDNA libraries. Amplified ribosomal DNA restriction analysis (ARDRA) and colony hybridization with an oligonucleotide probe designed to detect Pseudomonas spp. showed under elevated atmospheric CO2 content an increased dominance of pseudomonads in the rhizosphere of L. perenne and a decreased dominance in the rhizosphere of T. repens. This work provides evidence for a CO2-induced alteration in the structure of the rhizosphere bacterial populations, suggesting a possible alteration of the plant-growth-promoting-rhizobacterial (PGPR) effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002489900155
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  • 4
    Electronic Resource
    Electronic Resource
    Micromorphology of Gram-negative hydrogen bacteria (1977)
    Springer
    Archives of microbiology 114 (1977), S. 101-110 
    Details
    ISSN: 1432-072X
    Keywords: Ultrastructure ; Micromorphology ; Gram-negative ; Hydrogen bacteria ; Cell envelope ; Cytoplasmic inclusions ; Membranes ; Mesosomes ; Glycogen ; Poly-β-hydroxybutyrate ; Cell wall types
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The fine structure of the cell envelope, of membrane systems and of cytoplasmic inclusions of Gram-negative aerobic hydrogen bacteria has been studied. The results have been tabulated, and three main groups could be recognized: Group 1: Alcaligenes eutrophus, A. paradoxus, A. ruhlandii, Pseudomonas facilis, P. flava, P. pseudoflava, P. palleronii, and Aquaspirillum autotrophicum; Group 2: “Corynebacterium” autotrophicum and strains MA 2 and SA 35; Group 3: Paracoccus denitrificans. Special structures related to the chemoautotrophic way of life of the hydrogen bacteria were not observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00410770
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  • 5
    Electronic Resource
    Electronic Resource
    Physiological characterization of the hydrogen bacterium Aquaspirillum autotrophicum (1978)
    Springer
    Archives of microbiology 116 (1978), S. 221-229 
    Details
    ISSN: 1432-072X
    Keywords: Aquaspirillum autotrophicum ; Hydrogen bacterium ; Growth ; Chemolithoautotrophy ; Particulate hydrogenase ; Induction ; Repression ; Natural habitats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Aquaspirillum autrotrophicum, an aerobic hydrogen bacterium recently isolated from an eutrophic freshwater lake, was characterized physiologically. It grew autotrophically in a fermenter with a doubling time of 4 h. Heterotrophic growth was faster. pH-Optimum ranged from 5.0–7.5, temperature optimum was about 28° C. During autotrophic growth about 10 moles hydrogen were consumed per 1 mole carbon dioxide fixed. Hydrogenase activity is inducible. CO2 did not enhance the oxy-hydrogen reaction by intact cells. The hydrogenase activity was localized in the particulate fraction. The hydrogenase reduced methylene blue and phenazine methosulfate; pyridine nucleotides were not reduced. In cell-free extracts, hydrogenase was sensitive to oxygen. Ribulosebisphosphate carboxylase was present in autotrophically-grown cells and absent from heterotrophically grown cells. Hydrogenase induction in heterotrophically-grown cells followed parabolic kinetics. Oxygen and D-gluconate repressed hydrogenase synthesis, whereas citrate, DL-lactate and pyruvate stimulated its formation. The repressive effect was delayed. The results suggest that the control of hydrogenase synthesis occurred at the transcriptional level, and that mRNA coding for the hydrogenase had a relatively long life span. D-Gluconate was degraded via the Entner-Doudoroff pathway, the enzymes of which were constitutively formed. Enzymes of the pentosephosphate and Embden-Meyerhof pathways (except phosphofructokinase) were present, too. Hydrogen did not inhibit heterotrophic growth. The possible competitive advantage of the physiological properties described with regard to the natural habitat was discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00417843
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  • 6
    Electronic Resource
    Electronic Resource
    Micromorphology of Gram-negative hydrogen bacteria (1977)
    Springer
    Archives of microbiology 114 (1977), S. 93-100 
    Details
    ISSN: 1432-072X
    Keywords: Ultrastructure ; Micromorphology ; Gram-negative hydrogen bacteria ; Flagellation ; Flagellar fine structure ; Pili
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The cell morphology, the arrangement and fine structure of flagella and the piliation of the following Gram-negative aerobic hydrogen bacteria have been studied: Alcaligenes eutrophus, Alcaligenes paradoxus, Alcaligenes ruhlandii, Pseudomonas flava, Pseudomonas pseudoflava, Pseudomonas palleronii, Pseudomonas facilis, Aquaspirillum autotrophicum, Paracoccus denitrificans, Corynebacterium autotrophicum, and strains MA 2 and SA 35. The identity of the bacteria was examined by their substrate spectra and type of flagellation. Three types of flagellar fine structure were differentiated. The presence of pili was noted in strains of Alcaligenes paradoxus, Pseudomonas flava, P. pseudoflava, P. palleronii, and P. facilis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00410769
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  • 7
    Electronic Resource
    Electronic Resource
    Enrichment, isolation and preliminary characterization of a thermophilic, endospore-forming hydrogen bacterium (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.tb01874.x
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  • 8
    Electronic Resource
    Electronic Resource
    Potentiation by 1,2-dibromoethane of lipid peroxidation and irreversible hepatocyte damage due to carbon tetrachloride
    Amsterdam : Elsevier
    Free Radical Biology and Medicine 9 (1990), S. 161 
    Details
    ISSN: 0891-5849
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0891-5849(90)90748-8
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  • 9
    Electronic Resource
    Electronic Resource
    Description and physiological properties of an autotrophic hydrogen-oxidizingSpirillum (1977)
    Springer
    Cellular and molecular life sciences 33 (1977), S. 139-139 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01936820
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    The importance of microbiology in waste management (1992)
    Springer
    Cellular and molecular life sciences 48 (1992), S. 362-366 
    Details
    ISSN: 1420-9071
    Keywords: Microbiology ; aerobic processes ; anaerobic processes ; waste disposal ; landfills ; landfill topsoil ; biogas ; biomethanization ; percolating waters ; tetrachloroethylene, anaerobic biodegradation ; vinyl chloride, anaerobic production ; incineration ; biofilter ; composting ; Aspergillus fumigatus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Until a hundred years ago, the waste products from human activities were returned into the environment and underwent the biosphere's natural elimination processes without there being any long-term charge on the environment. During the last century, the increase in the amount of refuse has been accompanied by a decrease in its quality, mainly due to the production and dispersal of heavy metals and xenobiotic compounds. Both useful and noxious microbial processes have been underestimated in applied research in the field of waste management which, until now, has dealt mainly with artificial technologies. This paper presents some examples of microbiological processes occurring in waste treatment, particularly dumping, waste incineration, composting and biomethanization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01923430
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