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  • Artikel: DFG Deutsche Nationallizenzen  (5)
  • 1985-1989  (2)
  • 1980-1984  (3)
  • 1925-1929
  • millimeter-wave  (4)
  • electron cyclotron resonance maser  (3)
  • Cholera toxin  (1)
Datenquelle
  • Artikel: DFG Deutsche Nationallizenzen  (5)
Materialart
Erscheinungszeitraum
  • 1985-1989  (2)
  • 1980-1984  (3)
  • 1925-1929
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Comparative study of the effect of cholera toxin and sodium deoxycholate on the paracellular permeability and on net fluid and electrolyte transfer in the rat colon (1980)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 312 (1980), S. 91-97 
    Details
    ISSN: 1432-1912
    Schlagwort(e): Rat colon mucosa ; Cholera toxin ; Deoxycholate ; Permeability ; Morphology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary 1. The effect of deoxycholate and cholera toxin on the transfer of water, sodium, potassium and chloride and on mucosal permeability was studied in perfusion experiments on rat colon in vivo. The influence of both secretagogues on surface morphology was assessed by scanning electron microscopy. 2. Deoxycholate turned the absorption of water, sodium and chloride to secretion and enhanced potassium secretion. Cholera toxin induced water and sodium secretion, inhibited chloride absorption and enhanced potassium secretion. 3. Deoxycholate increased reversibly the mucosal permeability as measured by the colonic clearance of 51CrEDTA and glucose, whereas cholera toxin decreased the colonic 51CrEDTA clearance. 4. Deoxycholate caused protrusion of the luminal cell surface and an increase of exfoliation of epithelial cells. The epithelial continuity was preserved. The only change induced by cholera toxin was an enhanced mucus extrusion. 5. Our results are consistent with the view that deoxycholate causes fluid secretion by filtration whereas cholera toxin enhances the secretory activity of the epithelium.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00502580
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Continuously tunable, split-cavity gyrotrons (1985)
    Springer
    International journal of infrared and millimeter waves 6 (1985), S. 1237-1254 
    Details
    ISSN: 1572-9559
    Schlagwort(e): gyrotron ; millimeter-wave ; microwave ; electron cyclotron resonance maser ; resonant cavities ; frequency tuning
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The cavity of the University of Sydney gyrotron, GYROTRON IIIB, is split in two longitudinally to allow and frequency that lies between the fixed cavity resonances to be accessed by mechanically changing the separation of the two halves. The rate of change in resonant frequency with separation is greatest if the minor axis of the cavity cross-section is the one undergoing change. Results obtained with the latest cavity demonstrate this and show excellent agreement with theory.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01013212
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 3
    Digitale Medien
    Digitale Medien
    Tuneable millimeter-wave gyrotrons (1982)
    Springer
    International journal of infrared and millimeter waves 3 (1982), S. 725-734 
    Details
    ISSN: 1572-9559
    Schlagwort(e): gyrotron ; millimeter-wave ; microwave cavities ; microwaves ; electron cyclotron maser
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract In the course of developing a low-power, tuneable millimeter-wave source, two gyrotrons have been constructed. Gyrotron I was a fixed-frequency device operating at 120 GHz while Gyrotron II produced more than 20 lines in the frequency range 130 to 260 GHz. The design of tuneable gyrotrons is discussed with reference to the Gyrotron II results.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01009730
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Frequency detuning measurements in a low-power gyrotron (1983)
    Springer
    International journal of infrared and millimeter waves 4 (1983), S. 891-900 
    Details
    ISSN: 1572-9559
    Schlagwort(e): gyrotron ; millimeter-wave ; microwave ; electron cyclotron resonance maser ; frequency detuning ; frequency pulling
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Frequency detuning in the University of Sydney Gyrotron II has been measured for a number of modes in the vicinity of the TE0 14 1 mode at 183 GHz. The main features of the observations agree with theory and the importance of a detailed knowledge of the electron velocity distribution and the cavity Q's is established.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01009314
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  • 5
    Digitale Medien
    Digitale Medien
    Observation of mode conversion in gyrotrons (1985)
    Springer
    International journal of infrared and millimeter waves 6 (1985), S. 1255-1266 
    Details
    ISSN: 1572-9559
    Schlagwort(e): gyrotron ; millimeter-wave ; microwave ; electron cyclotron resonance maser ; mode conversion ; far-field imaging
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The observed output power levels in the University of Sydney's gyrotron can be accounted for only by including the effects of mode conversion at waveguidetaper transitions in the vicinity of the resonant cavity. A series of measurements taken from liquid-crystal images of the microwave fields beyond the output window confirms this.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01013213
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    Artikel (Nationallizenzen)
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