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  • Archaebacteria  (2)
  • Gas chromatography  (2)
  • 1
    Digitale Medien
    Digitale Medien
    The amino acid sequence of a small DNA binding protein from the archaebacterium Sulfolobus solfataricus
    Amsterdam : Elsevier
    FEBS Letters 176 (1984), S. 176-178 
    Details
    ISSN: 0014-5793
    Schlagwort(e): Amino acid sequence ; Archaebacteria ; DNA binding protein ; Sulfolobus solfataricus
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(84)80935-7
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  • 2
    Digitale Medien
    Digitale Medien
    Separation of 50 S ribosomal proteins from sulfolobus acidocaldarius by discontinuous reversed-phase chromatography (1988)
    Springer
    Chromatographia 25 (1988), S. 215-218 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Discontinuous reversed-phase chromatography ; 50S subunit ribosomal proteins ; Sulfolobus acidocaldarius ; Archaebacteria
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary The total protein of the 50S ribosomal subunit (TP50) from the archaebacterium Sulfolobus acidocaldarius was prefractionated by discontinuous reversed-phase HPLC with several column combinations. The purity of the eluted fractions was tested by sodium dodecylsulphate polyacrylamide gel electrophoresis (SDS-PAGE) or two-dimensional PAGE (2D-PAGE). With regard to the load capacity and selectivity, best results were obtained with a semi-preparative three-column combination (total length 67.5cm). Twelve A230 units of TP50 were separated into 35 fractions, 19 of which contained nearly pure proteins. When the sample load was increased to 176A230 units (109mg), 13 of 28 collected fractions still contained nearly pure proteins. The selectivity of a semi-preparative short-column combination (total length 12cm) was similar to that of the semi-preparative column combination, and separation time could be reduced to one third of that required for the longer column combination. The load capacity of the short-column combination was lower than that of the semi-preparative column combination.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02316447
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  • 3
    Digitale Medien
    Digitale Medien
    Investigation of gas chromatographic interaction mechanism on permethylated cyclodextrins by molecular modelling (1996)
    Springer
    Chromatographia 43 (1996), S. 187-194 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Gas chromatography ; Molecular modelling ; Molecular mechanics calculations ; Permethylated α-, β- and γ-cyclodextrins ; Interaction mechanism
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary The capillary gas chromatographic retention behavior of α-pinene and tricyclene has been investigated on stationary phases of different polarities. On all but one of the columns employed, tricyclene eluted before α-pinene; only permethylated β-cyclodextrins dissolved in moderately polar polisiloxanes gave a reversed elution order. The intermolecular interactions which caused the unexpected retention behavior were investigated in detail, applying methods of computer simulation. To achieve this, we have developed a calculation algorithm on the basis of molecular mechanical optimizations and programmed it in a macro. This makes it possible to systematically investigate a given configuration space in which all the possible interactions can take place. It was shown that permethylated β-cyclodextrin as host molecule for both guest molecules offers an optimum cavity size. As a result the number of energetically favorable contacts between host and guest molecules as well as the strength of the interactions in this stationary phase were larger. As a consequence the elution order, normally only influenced by the vapor pressure of the compounds at a given temperature, was changed. Nonspecific interactions played an especially important role for these kinds of substances.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02292949
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  • 4
    Digitale Medien
    Digitale Medien
    Enantiomer separation of side-chain fluorinated alkylbenzenes by capillary gas chromatography on cyclodextrin phases (1994)
    Springer
    Chromatographia 39 (1994), S. 192-199 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Gas chromatography ; Enantiomer separation ; Permethylated cyclodextrin stationary phases ; Side-chain fluorinated alkylbenzenes ; Thermodynamic data
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary The separation of racemic side-chain fluorinated alkylbenzenes and bromofluorinated analogues by capillary gas chromatography using permethylated α, β and γ-cyclodextrins dissolved in polysiloxanes of different polarity as stationary phases is described. The influence of the achiral polysiloxane matrices on the separation of enantiomers is discussed in the light of the results obtained with the different phases. For a part of the tested compounds thermodynamic data are determined which describe the interaction of enantiomers with the stationary phase. The mechanism of separation is discussed on this basis and by comparison with data for structurally similar compounds.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02274500
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