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  • silicon alkoxide  (2)
  • tunicates  (2)
  • (4S)- and (4R)-11Z-4-hydroxyretinal  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Synthesis of (+)-(4S)- and (-)-(4R)-11Z-4-hydroxyretinals and determination of the absolute stereochemistry of a visual pigment chromophore in the bioluminescent squid, Watasenia scintillans
    Amsterdam : Elsevier
    Tetrahedron Letters 35 (1994), S. 905-908 
    Details
    ISSN: 0040-4039
    Schlagwort(e): (4S)- and (4R)-11Z-4-hydroxyretinal ; absolute configuration ; circular dichroism (CD) ; exciton chirality method ; visual pigment
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0040-4039(00)75995-8
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Distribution of tunichrome and vanadium in sea squirt blood cells sorted by flow cytometry (1989)
    Springer
    Cellular and molecular life sciences 45 (1989), S. 186-190 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Fluorescence activated cell sorting (FACS) ; tunicates ; morula cells ; signet ring cells ; vanadium
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Specialized blood cells of many tunicates accumulate high concentrations of vanadium and phenolic peptide pigments called tunichromes (TC). In order to determine whether V and TC reside in the same cells,Ascidia nigra andAscidia ceratodes blood cell subpopulations were isolated by fluorescence-activated cell sorting (flow cytometry) and chemically analyzed. V was found in the spherical, gree/grey signet ring cells, and to a lesser degree in the mulberry-shaped, yellow/ green morula cells (MRs), whereas free TC was detected mainly in MRs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01954871
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    In vivo incorporation of14C-phenylalanine into ascidian tunichrome (1992)
    Springer
    Cellular and molecular life sciences 48 (1992), S. 367-371 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Tunichrome ; phenylalanine ; ascidian ; tunicates ; blood pigments
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract Ascidia ceratodes exposed to14C-phenylalanine in the surrounding seawater incorporates the radiolabel into newly biosynthesized tunichrome molecules. Radioactivity can be detected in tunichrome extracted from circulating blood cells within one day following initial exposure to the radiolabel; weak activity (≤4 μCi/mol tunichrome=22 nmol phenylalanine/mol tunichrome) is detected in 1 to 10 days; significantly higher amounts of radiolabel (57 μCi/mol tunichrome=318 nmol phenylalanine/mol tunichrome) appear 20 days after seawater exposure. Therefore, phenylalanine can function as a precursor in the biosynthesis of tunichrome.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01923431
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  • 4
    Digitale Medien
    Digitale Medien
    Double Pore Silica Gel Monolith Applied to Liquid Chromatography (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 547-552 
    Details
    ISSN: 1573-4846
    Schlagwort(e): silicon alkoxide ; phase separation ; double pore structure ; liquid chromatography ; Van Deemter equation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Silica gels retaining double pore structure in the size ranges of micrometer and nanometer have been applied to the rod-shaped monolithic column for liquid chromatography. The macropore structure was designed by controlling the phase separation process induced by the hydrolysis and polycondensation of alkoxysilane, whereas the mesopore structure was tailored by the solvent exchange treatments on wet gels. The size exclusion chromatograms on polystyrene standards exhibited almost similar features for octadecyl-modified rod and conventional packed beads columns. The dependence of plate height on the velocity of mobile phase determined for amylbenzene was by far weaker in the rod column than in the packed beads column, suggesting that additional geometrical factors should be considered in describing the separation mechanism in the rod column.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1018331101606
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Double pore silica gel monolith applied to liquid chromatography (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 547-552 
    Details
    ISSN: 1573-4846
    Schlagwort(e): silicon alkoxide ; phase separation ; double pore structure ; liquid chromatography ; Van Deemter equation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Silica gels retaining double pore structure in the size ranges of micrometer and nanometer have been applied to the rod-shaped monolithic column for liquid chromatography. The macropore structure was designed by controlling the phase separation process induced by the hydrolysis and polycondensation of alkoxysilane, whereas the mesopore structure was tailored by the solvent exchange treatments on wet gels. The size exclusion chromatograms on polystyrene standards exhibited almost similar features for octadecyl-modified rod and conventional packed beads columns. The dependence of plate height on the velocity of mobile phase determined for amylbenzene was by far weaker in the rod column than in the packed beads column, suggesting that additional geometrical factors should be considered in describing the separation mechanism in the rod column.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02436897
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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