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  • Articles: DFG German National Licenses  (3)
  • Lipid A  (2)
  • 16.16d  (1)
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  • Articles: DFG German National Licenses  (3)
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Scanning near-field acoustic microscopy (1989)
    Springer
    Applied physics 48 (1989), S. 89-92 
    Details
    ISSN: 1432-0649
    Keywords: 16.16d ; 43.35d
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Scanning near-field acoustic microscopy (SNAM) is a new method for imaging the topography of nonconducting surfaces at a potential lateral resolution in the sub-micron range. The basic element of this method is a distance sensor consisting of a sharply pointed vibrating tip, which is part of a high-Q quartz resonator driven at its resonance frequency. The decrease of the resonance frequency or of the amplitude of vibration when an object comes into the proximity of the tip serves as the important signal. The dependence of this signal on pressure and composition of the coupling gas shows that the hydrodynamic forces in the gas are responsible for the coupling between object and tip. The sensor is incorporated into a scanning device. Well-resolved line scans of a grating of 8 μm periodicity, a lateral resolution of 3 μm and a vertical resolution of 5nm have been achieved in our first experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694423
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The lipopolysaccharide of the green sulfur bacterium Chlorobium vibrioforme f. thiosulfatophilum (1987)
    Springer
    Archives of microbiology 149 (1987), S. 125-129 
    Details
    ISSN: 1432-072X
    Keywords: Chlorobiaceae ; Chlorobium vibrioforme ; Degraded polysaccharide ; DOC-PAGE ; Lipid A ; Lipopolysaccharide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The cell wall lipopolysaccharide of the green sulfur bacterium Chlorobium vibrioforme f. thiosulfatophilum was obtained by the phenol-chloroform-petroleum ether and the hot phenol-water methods, respectively. It contained mannose, glucose, galacturonic acid, glucosamine, glycine, and small amounts of rhamnose, galactose and glucuronic acid. In addition to d-glycero-d-mannoheptose, the corespecific constituents 2-keto-3-deoxyoctonate and l-glycero-d-mannoheptose were found. Polyacrylamide gel-electrophoresis in the presence of sodium deoxycholate gave no indication for the presence of O-specific repeating units. Degradation of the lipopolysaccharide required 10% acetic acid (100° C, 2 h). The lipid A moiety contained the total of glucosamine of the lipopolysaccharide as well as small amounts of 2,3-diamino-2,3-dideoxy-glucose. It was phosphate-free. The fatty acid spectrum comprised 3-OH-14:0, 3-OH-16:0, and iso-3-OH-18:0 besides little 12:0, 14:0 and 16:0. Hydroxylaminolysis and sodium methylate treatment revealed all of the three hydroxy fatty acids to be amidebound.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00425077
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The lipopolysaccharide of the phototrophic bacterium Ectothiorhodospira vacuolata (1988)
    Springer
    Archives of microbiology 149 (1988), S. 245-248 
    Details
    ISSN: 1432-072X
    Keywords: Ectothiorhodospira vacuotata ; Lipopolysaccharide ; Lipid A ; DOC-PAGE ; Phototrophic bacteria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The lipopolysaccharide of Ectothiorhodospira vacuolata was obtained by the phenol-water procedure. It contained a 3-O-methyl-hexose, glucose, galacturonic and glucuronic acids. The finding of d-glycero-d-mannoheptose and 2-keto-3-deoxyoctonate (tentatively identified) suggested a core-structure. The lipid fraction of the lipopolysaccharide contained phosphate and both, 2,3-diamino-2,3-dideoxy-d-glucose and d-glucosamine. The major fatty acids were amine-bound 3-OH-10:0 and 3-OH-12:0 and esterbound 14:0 and 16:0 Sodium deoxycholate gel-electrophoresis, showing a single band only, indicated R-type character of the lipopolysaccharide of Ectothiorhodospira vacuolata.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00422012
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    Paper (German National Licenses)
    Fulltext
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