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  • 1985-1989
  • 1975-1979  (8)
  • 1979  (4)
  • 1975  (4)
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  • 1985-1989
  • 1975-1979  (8)
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Phosphatases in the central nervous system of spiders (1979)
    Springer
    Histochemistry and cell biology 59 (1979), S. 177-187 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The central nervous systems of web-building spiders (Araneidae, Agelenidae) and hunting spiders (Lycosidase, Salticidae) were tested for non-specific and specific phosphatases. Acid phosphatase exhibited weakly to moderately positive reactions in the neuronal cell bodies and in the neuropile fibre mass of all species investigated. Alkaline phosphatase could only be demonstrated in the external and internal neural lamellae of the brain and ventral cord of several specimens of the araneid species investigated. Tests for thiamine pyrophosphatase were negative with both the lead and calciumcobalt methods. Distinctive positive reactions for adenosine triphosphatase were visible in the nervous system of all the species used, being especially strong in the optic ganglia of the hunting spiders. The demonstration of adenosine triphosphatase was only possible when applying the calcium-cobalt method after Padykula and Herman, while the lead method after Wachstein and Meisel did not produce any staining reaction at all. Controls of the histochemical reaction showed that the enzyme was activated by Ca2+ and inhibited by sulphydryl destroying reagents (e.g. PCMB), but was insensitive to ouabain. It could be probably classified as a mitochondrial proton-translocating adenosine triphosphatase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00495665
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Untersuchungen über die Concanavalin A-Rezeptoren von Kaninchenerythrozyten und von Erythrozytenschatten mit der Immun-Elektronenmikroskopie (1975)
    Springer
    Annals of hematology 30 (1975), S. 31-38 
    Details
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The authors report on the immuno electron microscopic demonstration of Concanavalin A-receptors on the erythrocyte membrane. Immuno freeze-etching studies evidenced a focal arrangement of Concanavalin A-receptors on intact erythrocytes as well as on erythrocyte ghosts. Obviously hemolysis by distilled water does not produce changes in the pattern of distribution of Concanavalin A-receptors whereas slight aggregation of plasma membrane intramembraneous particles occured. No unambigous spatial relationship between Concanavalin A-receptors and the plasma membrane intramembraneous particles (intrinsic proteins) of erythrocytes could be observed.
    Notes: Zusammenfassung Es wird über den immun-elektronenmikroskopischen Nachweis der Concanavalin A-Rezeptoren der Erythrozytenmembran berichtet. Die Immun-Gefrierätzungsuntersuchungen zeigten, daß die Concanavalin A-Rezeptoren sowohl der intakten Erythrozyten als auch der Erythrozytenschatten herdförmig verteilt sind. Die Aqua dest.-Hämolyse führt offenbar zu keiner Umverteilung der Concanavalin A-Rezeptoren, während eine geringfügige Aggregation der intramembranösen Partikeln der Plasmamembran eintrat. Eine eindeutige räumliche Beziehung der Concanavalin A-Rezeptoren zu den intramembranösen Partikeln (intrinsic proteins) der Plasmamembran der Erythrozyten konnte nicht beobachtet werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01633784
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Experimentelle Chorioretinitis des Kaninchens durch homologe und heterologe Photoreceptor-Außensegmente (1975)
    Springer
    Graefe's archive for clinical and experimental ophthalmology 197 (1975), S. 269-272 
    Details
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Durch Versuche an 73 GrCh-Kaninchen wird belegt, daß homologe und heterologe (bovine) Photoreceptor-Außensegmente (ROS) klinisch gleichartige Chorioretinitiden induzieren. Die Befunde vermitteln Hinweise zur Lokalisation und zum Wirkungsgrad des homologen und heterologen (bovinen) pathogenen Antigens.
    Notes: Summary Experiments with 73 GrCh rabbits showed, that both homologous and heterologous (bovine) photoreceptor outer segments (ROS) induce chorioretinitic diseases of the same kind. The findings refer to questions of localization and efficiency of homologous and heterologous (bovine) pathogenic ROS antigens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00410871
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Über eine topologische und zahlentheoretische Anwendung von Hirzebruchs Spitzenauflösung (1979)
    Springer
    Mathematische Annalen 240 (1979), S. 69-96 
    Details
    ISSN: 1432-1807
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01428301
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Photoproduction of neutral pions in the region of the fourth nucleon resonance (1979)
    Springer
    The European physical journal 1 (1979), S. 257-258 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report the measurement of the differential cross section of the reaction γ +p→π0 +p at a photon energy of 1.4 GeV and pion c.m. angles between 60 and 175 degrees. The angular distribution confirms the simple quark model prediction of a pure magnetic excitation of theF 37 (1950) resonance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01440225
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Zur experimentellen Chirurgie der Pankreas-Autotransplantation (1975)
    Springer
    Langenbeck's archives of surgery 340 (1975), S. 107-115 
    Details
    ISSN: 1435-2451
    Keywords: Pancreatic exocrine function ; Islet function ; Transplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In unserer Versuchsanordnung haben wir ein Modell einer in traabdominellen heterotopen Pankreas-Duodenum-Autotransplantation geschaffen. Zwei Hunde überlebten für lange Zeit in befriedigendem Zustand. Zu Anfang, unmit telbar nach Pankreas-Autotransplantation, konnte ein Gewichtsverlust infolge exokriner Pankreasunterfunktion beobachtet werden. 3 Monate später hatten die Tiere wieder ihr Ausgangsgewicht. Im Gegensatz zur exokrinen Funktion konnte die endokrine über den gesamten Beobachtungszeitraum, mit Ausnahme weniger Tage unmittelbar nach der Transplantation, erhalten werden. Im Gegensatz zu Kontrolltieren zeigte sich beim Tolbutamid-Test eine signifikante Verlängerung der Hypoglykämie. Der Glucosetoleranz Test verlief normal. Eine Fibrosierung nach Pankreas-Autotransplantation konnte nicht beobachtet werden. Dieses experimentelle Modell ist sehr hilfreich für die Langzeit Beobachtung einer heterotopen Pankreas-Autotransplantation. Denervierung und Unterbrechung der lymphatischen Bahnen scheinen zwar einen vorübergehenden, jedoch keinen dauerhaften Einfluß auf die endokrine oder exokrine Pankreasfunktion zu haben.
    Notes: Summary We have described a technique of one stage intraabdominal heterotopic pancreaticduodenal autotransplantation which has resulted in long term survival of dogs in good health. Malnutrition related to pancreatic exocrine hypofunction occurs initially but gradual recovery by 3 months nutrition is normal. In contrast, endocrine function is well preserved throughout the postoperative period except for a few days immediately after transplantation. Tolbutamide testing showed a significant prolongation of hypoglycemia as compared to controls although glucose tolerance curves were normal. There was no fibrosis after pancreas- autotransplantation. This experimental model is useful for long term evaluation of heterotopic transplantation of the pancreas. Denervation and lymphatic interruption of the pancreas may cause a transient but not definitive influence on pancreatic endocrine or exocrine function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01259418
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Photoproduction of neutral pions at backward angles in the resonance region and the η-cusp (1979)
    Springer
    The European physical journal 1 (1979), S. 327-336 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract At the Bonn 2.5 GeV electron synchrotron we have measured the differential cross section of the reaction γp→π0 p at a pion CM angle of 170° and at photon energiesK γ between 0.6 and 1.8 GeV. In comparison to previous measurements the accuracy of the data was improved substantially. For the first time in neutral pion photoproduction a cusp structure at the η-threshold has been confirmed [1].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01546970
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Fragment angular distributions from fission of238U,209Bi and197Au by 140-MeV4He Ions (1975)
    Springer
    The European physical journal 274 (1975), S. 131-137 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The fission fragment angular distributions from reactions of 140-MeV4He ions with238U,209Bi and197Au have been studied. From the anisotropies in the angular distributions, values forℊ eff, the effective moment of inertia at the fission saddle point, have been estimated and compared with results obtained at lower bombarding energies. The derivation ofℊ eff values has included corrections for the effects of incomplete fusion mechanisms on the orbital angular momentum distribution of the fissioning nuclei and for neutron evaporation prior to fission. The results are also compared with heavy-ion-induced fission data for systems of similar fissility. Also, examination of the forward-backward symmetry of the238U angular distribution substantiates other results which show that the fraction of fission reactions which follow complete fusion of the target and projectile is less than 0.5 for 140-MeV4He-ion bombardment of238U.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408465
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    Paper (German National Licenses)
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