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  • 1
    Electronic Resource
    Electronic Resource
    Glycerol and dihydroxyacetone dissimilation in Desulfovibrio strains (1987)
    Springer
    Archives of microbiology 147 (1987), S. 249-256 
    Details
    ISSN: 1432-072X
    Keywords: Desulfovibrio ; Glycerol dissimilation ; Glycerol kinase ; Dissimilatory sulfate reduction ; NADH dehydrogenase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract During growth on glycerol two marine Desulfovibrio strains that can grow on an unusually broad range of substrates contained high activities of glycerol kinase, NAD(P)-independent glycerol 3-phosphate dehydrogenase and the other enzymes necessary for the conversion of dihydroxyacetone phosphate to pyruvate. Glycerol dehydrogenase and a specific dihydroxyacetone kinase were absent. During growth on dihydroxyacetone, glycerol kinase is involved in the initial conversion of this compound to dihydroxyacetone phosphate which is then further metabolized. Some kinetic properties of the partially purified glycerol kinase were determined. The role of NAD as electron carrier in the energy metabolism during growth of these strains on glycerol and dihydroxyacetone is discussed. Glycerol also supported growth of three out of four ‘classical’ Desulfovibrio strains tested. D. vulgaris strain Hildenborough grew slowly on glycerol and contained glycerol kinase, glycerol 3-phosphate dehydrogenase and enzymes for the dissimilation of dihydroxyacetone phosphate. In D. gigas which did not grow on glycerol the enzymes glycerol kinase and glycerol 3-phosphate dehydrogenase were absent in lactate-grown cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00463484
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  • 2
    Electronic Resource
    Electronic Resource
    Immunocytochemical localization of APS reductase and bisulfite reductase in three Desulfovibrio species (1988)
    Springer
    Archives of microbiology 150 (1988), S. 296-301 
    Details
    ISSN: 1432-072X
    Keywords: Desulfovibrio ; Dissimilatory sulfate reduction ; APS reductase ; Bisulfite reductase ; Enzyme localization ; Immunogold labeling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The localization of APS reductase and bisulfite reductase in Desulfovibrio gigas, D. vulgaris Hildenborough and D. thermophilus was studied by immunoelectron microscopy. Polyclonal antibodies were raised against the purified enzymes from each strain. Cells fixed with formaldehyde/glutaraldehyde were embedded and ultrathin sections were incubated with antibodies and subsequently labeled with protein A-gold. The bisulfite reductase in all three strains and APS reductase in d. gigas and D. vulgaris were found in the cytoplasm. The labeling of d. thermophilus with APS reductase antibodies resulted in a distribution of gold particles over the cytoplasmic membrane region. The localization of the two enzymes is discussed with respect to the mechanism and energetics of dissimilatory sulfate reduction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00407795
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  • 3
    Electronic Resource
    Electronic Resource
    Anaerobic degradation of betaine by marine Desulfobacterium strains (1989)
    Springer
    Archives of microbiology 152 (1989), S. 393-396 
    Details
    ISSN: 1432-072X
    Keywords: Betaine ; Desulfobacterium strains ; N,N-dimethylglycine ; Sulfate-reducing bacteria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract From enrichment cultures with betaine (20 mM) and sulfate (20 mM) as the substrates and intertidal mud as an inoculum, a betaine-oxidizing, sulfate-reducing bacterium (strain PM4) was isolated. Strain PM4 was an oval to rod-shaped, Gram-negative, motile bacterium, which was able to oxidize lactate completely to CO2 and contained, during growth on betaine and sulfate, high activities of key enzymes of the acetyl CoA/CO dehydrogenase pathway (carbon monoxide dehydrogenase and formate dehydrogenase), but not of 2-oxo-glutarate dehydrogenase, a key enzyme of the citric acid cycle. On the basis of its morphological and physiological characteristics, strain PM4 was identified as a Desulfobacterium strain. Desulfobacterium PM4 grew on betaine with a doubling time of approximately 20 h at 30°C and produced N, N-dimethylglycine (in a 1:1 ratio) and sulfide as products. In this type of betaine metabolism one of the methyl groups of betaine is oxidized to CO2 and the reducing equivalents generated are used for the reduction of sulfate. Desulfobacterium autotrophicum (DSM 3382) grew also on betaine and sulfate with the formation of N,N-dimethylglycine, sulfide and CO2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00425179
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  • 4
    Electronic Resource
    Electronic Resource
    Catabolism of malate and related dicarboxylic acids in various Desulfovibrio strains and the involvement of an oxygen-labile NADPH dehydrogenase (1988)
    Springer
    Archives of microbiology 151 (1988), S. 34-39 
    Details
    ISSN: 1432-072X
    Keywords: Desulfovibrio ; Dicarboxylic acids ; l-Malate ; NADPH dehydrogenase ; Dissimilatory sulfate reduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four out of five Desulfovibrio strains tested were able to oxidize l-malate to acetate in the presence of sulfate. Fumarate and succinate were also oxidized to acetate by these strains, but growth with the latter substrate was marginal. During growth on malate high NADP-dependent malic enzyme and NADPH DH activities were found in all strains. These activities were lower in lactate-or pyruvate-grown cells. An NADPH DH from D. gigas was partially purified. It was oxygen-labile, very sensitive to heavy metal ions and highly specific for NADPH. Growth yield studies indicated that energy conservation occurred during the transport of reducing equivalents from NADPH to the sulfate reduction pathway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00444665
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  • 5
    Electronic Resource
    Electronic Resource
    Ethanol dissimilation in Desulfovibrio (1988)
    Springer
    Archives of microbiology 150 (1988), S. 552-557 
    Details
    ISSN: 1432-072X
    Keywords: Desulfovibrio ; Ethanol dissimilation ; Dissimilatory sulfate reduction ; Alcohol dehydrogenase ; Aldehyde dehydrogenase ; NADH dehydrogenase ; Interspecies hydrogen transfer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract During growth of ethanol plus sulfate Desulfovibrio gigas and three other Desulfovibrio strains tested contained high NAD-dependent alcohol dehydrogenase activities and dye-linked aldehyde dehydrogenase activities. In lactate-grown cells these activities were lower or absent. In D. gigas an NADH dehydrogenase activity was found which was higher during growth on ethanol than during growth on lactate. The NADH dehydrogenase activity appeared to consist of at least three different soluble enzymes. The aldehyde dehydrogenase activity in D. gigas was highest with benzylviologen as an acceptor and was strongly stimulated by potassium ions. Coenzyme A or phosphate dependency could not be shown, indicating that acetyl-CoA or acetyl phosphate are not intermediates in the conversion of acetaldehyde to acetate. In the absence of sulfate D. gigas was able to convert ethanol to acetate by means of interspecies hydrogen transfer to a methanogen. This conversion, however, did not lead to growth of the Desulfovibrio.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00408248
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  • 6
    Electronic Resource
    Electronic Resource
    Pathway of propionate formation from ethanol in Pelobacter propionicus (1987)
    Springer
    Archives of microbiology 147 (1987), S. 321-327 
    Details
    ISSN: 1432-072X
    Keywords: Propionate formation ; Ethanol fermentation ; Succinate pathway ; Petobacter propionicus ; Cytochrome b ; Anaerobic electron transport ; Pyruvate synthase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Whole cells of Pelobacter propionicus fermented (1-13C) ethanol and CO2 to nearly equal amounts of (2-13C) and (3-13C) propionate and to (1-13C) acetate indicating a randomizing pathway of propionate formation. Enzymes involved in the fermentation were assayed in cell-free extracts and cetyltrimethylammonium bromide-permeabilized cells grown with ethanol as sole substrate. Alcohol dehydrogenase, aldehyde dehydrogenase (benzylviologen-reducing), phosphate acetyl transferase, acetate kinase, pyruvate synthase, methylmalonyl CoA: pyruvate transcarboxylase, propionyl CoA: succinate CoA transferase, and the enzymes of the succinate-methylmalonyl CoA pathway all were detected at activities sufficient to be involved in ethanol fermentation. Very low amounts of a b-type cytochrome were detected in ethanol-grown cells (46 nmol δ g protein−1). Low cell yields obtained with ethanol as substrate indicate that P. propionicus does not conserve energy by electron transport-linked fumarate reduction. Despite the presence of a hydrogenase and a shift in the fermentation of lactate towards the formation of more propionate in the presence of hydrogen, P. propionicus was unable, to catalyze, the reduction of acetate and CO2 to propionate, unlike Desulfobulbus propionicus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406127
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  • 7
    Electronic Resource
    Electronic Resource
    Raman trace scattering intensity parameters for propane (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 3341-3346 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Absolute Raman trace scattering cross sections have been measured for gaseous propane-h8, propane-d8, 1,1,1,2,3,3,3-propane-d7, and the two rotational isomers of 1,1,2,2,3,3,3-propane-d7. A set of ∂α¯/∂Sj intensity parameters were determined from the experimental cross sections and compared with the ones obtained from quantum chemistry calculations. The anomalous intensity ratio observed for the CH stretching bands of the two conformers of CHD2CD2CD3 is explained by an unanticipated difference in the ∂α¯/∂rCH value for the two types of methyl CH bonds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453028
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  • 8
    Electronic Resource
    Electronic Resource
    DIRECT HLA TYPING BY ROSETTING WITH IMMUNOMAGNETIC BEADS COATED WITH SPECIFIC ANTIBODIES (1989)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 16 (1989), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Paramagnetic monodisperse polymer beads were coated with purified human hybridoma antibodies specific for polymorphic HLA determinants. The mAb-coated beads bound specifically to cells from individuals with the relevant HLA type. The rosettes formed by beads and cells were isolated with a magnet. Rosette formation was evaluated microscopically and used as criterion for positive typing. By this rosette assay, fast and reliable HLA typing of whole blood was possible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1989.tb00455.x
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  • 9
    Electronic Resource
    Electronic Resource
    Ab initio calculation of the dynamic polarizability of N2 (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 1950-1951 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450400
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  • 10
    Electronic Resource
    Electronic Resource
    The influence of three unchanging photoperiods on growth and parr-smolt transformation in Atlantic salmon, Salmo salar L. (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 35 (1989), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Groups of pre-smolt Atlantic salmon were reared under three experimental photoperiods. Growth rate was significantly enhanced under 24 h of light: 0 h of darkness per diem (24 L: 0 D) compared with 16 L: 8 D and 8 L: 16 D from early January to early May. From the beginning of May until the termination of the experiment on 27 May, growth rate was highest under 8 L: 16 D.All groups developed bimodal length-frequency distributions during the experiment. The proportion of the population in each of the two growth modes was significantly affected by photoperiod treatment.The level of plasma cortisol increased significantly from February to May. There were no differences in levels of plasma cortisol among photoperiod treatments.Judged by development in plasma cortisol, changes in condition factor and external appearance, the parr-smolt transformation was not completed under any of the experimental photoperiods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1989.tb02973.x
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