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  • 1
    Electronic Resource
    Electronic Resource
    Effects of lung preservation solutions on PMN activation in vitro (1999)
    Springer
    Transplant international 12 (1999), S. 113-121 
    Details
    ISSN: 1432-2277
    Keywords: Key words Lung preservation solution ; neutrophil ; chemotaxis ; adhesion molecule
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Polymorphonuclear leukocyte (PMN) activation and PMN-endothelial cell interactions may cause graft failure due to ischemia-reperfusion injury after lung transplantation. We investigated the effects of Euro-Collins solution (EC), low-potassium dextran solution (LPD), and EC plus pentoxifylline (EC-PTXF) on adhesion molecule (CD11b/CD18 and L-selectin) expression, chemotaxis, and oxidative burst of PMN. PMN from healthy human volunteers were incubated with EC, LPD, and EC-PTXF, and, in controls, without preservation solution. LPD exerted a suppressive effect on PMN chemotaxis as compared to EC (P 〈 0.05), but had no attenuating effect on the increase of CD11b/CD18, the shedding of L-selectin, and intracellular oxidant generation. EC-PTXF attenuated the expression of CD11b/CD18 and the oxidative burst as compared to EC alone (P 〈 0.05). These effects of LPD and PTXF on PMN function may contribute to successful organ preservation in transplantation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001470050195
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  • 2
    Electronic Resource
    Electronic Resource
    Evidence for the priming role of the central retinula cell in ommatidium differentiation of Ephestia kuehniella (1988)
    Springer
    Development genes and evolution 197 (1988), S. 184-189 
    Details
    ISSN: 1432-041X
    Keywords: Ommatidia differentiation ; Eye imaginal disc ; Insect eye
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In the developing compound eye of Ephestia kuehniella, within the advancing front of differentiation, regular cell clusters arise which consist of a central cell and two flanking cells. The central cell is destined to become the basal retinula cell later in development. Its crucial role in ommatidium formation is confirmed by 3H-thymidine labelling. Eye anlagen labelled early in the pupal stage incorporate thymidine within two distinct zones along the front of differentiation. After the ommatidia are completely differentiated, both zones contain labelled nuclei of all cell types which participate in ommatidia formation. Within the posterior zone, however, the basal retinula cells are always unlabelled, whereas in the anterior they show labelled nuclei. From this observation it must be concluded that the basal retinula cell first terminates proliferation (either alone or together with a few other cells) to become differentiated as the central retinula cell. These results agree with those found in Drosophila and indicate that the ordered stepwise addition of cells to a central founder cell is a widespread principle of ommatidia formation in insects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00427922
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  • 3
    Electronic Resource
    Electronic Resource
    Darstellung und Eigenschaften von 2-Benzothiazolylsilanen (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 594-605 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Properties of 2-Benzothiazolylsilanes2-Benzothiazolylsilanes (2-6) are synthesized by the reaction of chlorosilanes with 2-benzothiazolyllithium and by new trans-silylation reactions. The silicon-carbon bond at the heterocycle is shown to be very reactive. This is demonstrated by the easy hydrolysis even at room temperature, by the instability of the corresponding imonium salts and by electrophilic substitution in 2-position under mild conditions. The possibility for the formation of resonance stabilized π-systems is investigated.
    Notes: 2-Benzothiazolylsilane (2-6) werden durch Umsetzung von Chlorsilanen mit 2-Benzothiazolyllithium und durch neuartige Umsilylierungsreaktionen hergestellt. Die Silicium-Kohlenstoffbindung am Heterocyclus ist sehr reaktiv. Sie wird schon bei Raumtemperatur sehr leicht hydrolysiert, die entsprechenden Imoniumsalze sind instabil, und elektrophile Substitutionsreaktionen in 2-Stellung laufen schon unter sehr milden Bedingungen ab. Die Möglichkeit zur Ausbildung resonanzstabilisierter π-Systeme wird geprüft.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731060225
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  • 4
    Electronic Resource
    Electronic Resource
    Die reversible Umlagerung 4.4′-alkylierter 4.4′-Bispyrazolone-(5) (1965)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 98 (1965), S. 1795-1804 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Für die thermische Isomerisierung 4.4′-alkylierter 4.4′-Bispyrazolone-(5) wird ein homolytischer Verlauf postuliert: meso-Bispyrazolon ⇌ 2 Pyrazolonyl-Radikale ⇌ racem-Bispyrazolon. Von den durchgeführten Versuchen können die Polymerisationsauslösung an Vinylmonomeren, eine kinetische Studie der reduzierenden Spaltung eines meso- und racem-Bispyrazolons mit Phenylhydrazin und eine massenspektrometrische Untersuchung eines Bispyrazolons als Beweise mit unterschiedlicher Überzeugungskraft für den radikalischen Mechanismus gelten. Die Ergebnisse von Abfangversuchen mit Chloranil und eine ESR-Messung machen die Annahme einer kurzen Lebensdauer und hohen Energieinhalts für die Pyrazolonyl-Radikale notwendig.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19650980618
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  • 5
    Electronic Resource
    Electronic Resource
    Basenstabilisierte Germylene, III. Stickstoff-Germanium-Ylid-Komplexe von Chrom, Molybdän und Wolfram (1974)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 3616-3623 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Base-stabilized Germylenes, III. Nitrogen-Germanium-Ylide Complexes of Chromium, Molybdenum, and TungstenThe photochemical reaction of 3-benzothiazole-dichlorogermylene with the metal hexacarbonyls of chromium, molybdenum, and tungsten yields ylide complexes of the type C7H5NS·GeCl2M(CO)5. The benzothiazole-dichlorogermylene ligand is characterised by good π-acceptor qualities. The structure of the complexes is confirmed by i.r., 1H n. m. r., and mass spectra.
    Notes: Durch photochemische Umsetzung von 3-Benzothiazol-dichlorgermylen mit den Hexacarbonylen von Chrom, Molybdän und Wolfram entstehen die Ylid-Komplexe des Typs C7H5NS·GeCl2M(CO)5. Der Benzothiazol-dichlorgermylen-Ligand zeichnet sich durch ein hohes π-Akzeptorvermögen aus. Die Struktur der Komplexe wird durch IR-, 1H-NMR-und Massenspektren gesichert.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19741071115
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  • 6
    Electronic Resource
    Electronic Resource
    Über eine Synthese von α(γ)-Chinolyl-mercaptanen (1929)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 62 (1929), S. 2730-2736 
    Details
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19290621011
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