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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 29 (1978), S. 17-26 
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The concentration dependence of the diffusion coefficient of H and D in Nb and Ta in theα andα′ phases has been measured between 0 and 40% H or D/Nb or Ta by the Gorsky effect. Since this method allows to determine simultaneously the thermodynamic factor, the tracer-diffusion coefficient can be extracted from the data. An increase of the activation energy as a function of concentration has been found for all four systems. Whereas for Ta the isotope dependence of the diffusion coefficients continues to exist at high concentrations it surprisingly disappears for Nb.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 347 (1978), S. 624-625 
    ISSN: 1435-2451
    Keywords: Scintiscanning, gastroesophageal ; Reflux, gastroesophageal ; Hiatal hernia ; Gastro-oesophagealer Reflux ; Refluxszintimetrie ; Hiatushernie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Refluxszintimetrie erlaubt auf einfache, den Patienten nicht belastende Weise, unter klar defmierten Bedingungen die Inkompetenz des UOS zu dokumentieren. Nach Verabreichung von 300 μCi99mTechnetium DTPA wird die Aktivität über Magenfundus und Oesophagus mittels einer Gamma-Kamera mit EDV registriert. Eine kontrollierte Drucksteigerung im Abdomen wird durch eine pneumatische Manschette erzeugt. 45 Patienten wurden prä- und postoperativ nach Hiatushernien-Operation (SPV, Pyloroplastik, Gastropexie) untersucht: Zwei Drittel der Patienten (30/45) hatten keinen provozierbaren Reflux mehr.
    Notes: Summary Gastroesophageal (GE) scintiscanning can detect GE reflux rapidly, noninvasively, accurately, and with a greater sensitivity than other diagnostic techniques. The patient received 300 μCi99mTechnetium DTPA. The GE pressure gradient was increased in increments by inflating an abdominal binder. The radioactivity in the esophagus and stomach was measured using a gamma camera on line to a data analyzer and computer. Following repair of hiatal hernia (SPV, pyloroplasty, gastropexy), no reflux could be detected in two-thirds (30/45) of our patients.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 31 (1975), S. 1149-1151 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The morphology of model complexes between colloidal gold, ferritin and anti-ferritin antibodies has been studied in order to evaluate the potential of colloidal gold as a cytochemical marker.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 31 (1975), S. 1147-1149 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A rapid method has been developed to visualize cell surface receptors in the SEM. Thus mannan at the surface ofCandida utilis cells was localized by stabilized colloidal gold granules coated with either antimannan antibodies or Con A.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 65 (1978), S. 487-488 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Dans une premiere étape, on a procédé chez 4 chiens à la construction d'une poche de Heidenhain (PH) et chez 3 autres à une poche de Pavlov (PP). Chez 2 des chiens porteurs d'une poche de Pavlov on a aussi installé une canule oesophagienne. Chez tous les chiens, dans une 2ème et 3ème étape on a procédé respectivement à une vaguotomie proximale sélective (VPS) et à une pyloroplastie sous-muqueuse (P). Chez les chiens porteurs d'une PP et d'une canule oesophagienne, on a procédé à un test de repas simulé avant et après la VPS. Chez tous les autres animaux on a procédé à l'épreuve du repas après la completion des 3 étapes chirurgicales. Le repas simulé a produit une augmentation significative des taux de gastrine après la VPS mais la sécrétion d'acide a été abolie dans la PP. Après repas, les taux de gastrine se sont élevés significativement chez tous les chiens. Dans la PH, la sécrétion d'acide a été proportionnelle aux taux de gastrine, tandis dans la PP, après VPS, la sécrétion d'acide a été inhibée, malgré l'élévation post-brandiale des taux de gastrine. La construction d'une pyloroplastie a subséquemment réduit de faÇon significative la mise en circulation de gastrine chez tous les chiens. Cepandant, la sécrétion d'acide a diminué significativement seulement chez les chiens porteurs de PH.
    Notes: Abstract In a first operative stage, 4 dogs were prepared with Heidenhain pouches (HP) and 3 with Pavlov pouches (PP), 2 of the latter with an additional esophageal cannula. In a second stage all dogs had a selective proximal vagotomy (SPV), and in a third stage a submucosal pyloroplasty (P). Sham feeding experiments were carried out on the 2 dogs with PP and an esophageal fistula before and after SPV. Feeding tests were performed in all animals after the three operative procedures. Gastrin release after sham feeding increased significantly after SPV, whereas PP acid secretion was abolished. Gastrin release after feeding increased significantly after SPV in both HP and PP dogs. Acid secretion from HP was correlated with the changes in postprandial serum gastrin levels. PP acid secretion was diminished after SPV, in spite of the elevated gastrin levels. Subsequent pyloroplasty induced a significant decrease in the postprandial gastrin levels in both HP and PP dogs. However, acid secretion decreased significantly only in HP dogs.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 45 (1976), S. 1-15 
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Übersicht Für die pulsierende Strömung einer Newtonschen Flüssigkeit mit Absaugung längs der kreiszylindrischen Wand werden Geschwindigkeits-, Druck- und Spannungsverteilungen bestimmt. Dabei wird sowohl lineares als auch exponentiell abnehmendes Absaugevolumen behandelt. Für konstantes Absaugen längs der Wand wird die nichtlineare Lösung für kleine Querstrom-Reynoldszahlen angegeben.
    Notes: Summary Velocity-, stress- und pressure distribution has been investigated for the flow of a Newtonian liquid in a circular cylindrical tube with reabsorption across the wall. For constant reabsorption the nonlinear steady flow case has been treated for small cross flow Reynoldsnumbers, while for pulsatile flow the flow behavior is presented for constant and exponentially decaying reabsorption across the wall.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 6 (1975), S. 167-171 
    ISSN: 1432-0630
    Keywords: Surface analysis ; Auger electron spectroscopy ; Electron channeling pattern
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract In the scanning electron microscope the electron channeling patterns allow us to determine the orientation and quality of single crystal objects. If the Auger spectrometer is equipped with a scanning sample positioner, the electron channeling patterns can be observed with primary energies used in Auger spectroscopy, i.e. 0.5–5 keV.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-1017
    Keywords: Fluorescence polarization degree ; Fusion ; Label migration ; Lipid migration ; Cell membrane ; Virus envelope
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract The fluorescence depolarization of 1,6-diphenyl-hexatriene was used to study the dynamic properties of the hydrophobic regions of the lipid envelopes of ortho- and paramyxoviruses as well as of the Rous sarcoma virus and of the membrane lipids of susceptible and nonsusceptible cells. The systems investigated where active and inactive influenza viruses, and NDV virus acting on chick embryo fibroblasts and Rous sarcoma virus acting on susceptible (C/E) and nonsusceptible (C/B) chicken-cell. Polarization degrees and mean rotational correlation times of DPH embedded in viral lipids were significantly higher than those of DPH in the cell membranes, due to a higher rigidity of the virus envelopes. When suspensions of labelled viruses and unlabelled cells or unlabelled viruses and labelled cells were mixed, a characteristic change of the fluorescence polarization degrees with time was observed. This behaviour was ascribed to a label transfer from virus to cell membranes or vice versa. While the rate constants of label transfer from virus to cells and cells to virus were about the same for the penetrating viruses the rate constants of label release from inactive virus to cells were much larger than for the migration in the opposite direction.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Biological cybernetics 27 (1977), S. 63-70 
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract In this study we show that it is possible to derive experimentally measured Colour-Brightness Signals from 3 fundamental sensitivity functions. The cortical Colour-Brightness Signal is computed from the weighted summation of all afferent colour difference signals, cortically decoded. Large retinal bipolar signals are limited by ganglion cell nonlinearities. To account for colour adaptation, we use as a model principle a signal-adaptative gain regulation of the receptors. A logarithmic transformation of receptor signals is assumed. The summation of “blue” receptor signals which varies as a function of the adaptation level is described by a multiplication factor ε where ε〈1.
    Type of Medium: Electronic Resource
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