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  • 1980-1984  (5)
  • far-infrared  (3)
  • Carcinoids  (1)
  • Gastric endocrine cells  (1)
  • Arterial compliance
  • 1
    ISSN: 1432-1335
    Keywords: Gastric endocrine cells ; Endocrine cell carcinoma ; Early gastric cancer ; Scirrhous carcinoma ; Immunohistochemistry ; Schlüsselwörter ; Gastrische Endokrinzellen ; Endokrine Carcinome ; Frühcarcinom des Magens ; Scirrhöses Carcinom ; Immunhistochemie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 18 Argyrophilzellencarcinome aus insgesamt 101 Frühcarcinomen des Magens wurden lichtmikroskopisch, elektronenmikroskopisch sowie immunhistochemisch mit Antiseren gegen Polypeptide, CEA, Lysozyme und hCG untersucht. 7 dieser Tumoren enthielten Gastrin und 2 unter ihnen außerdem Somatostatin. In allen 18 Tumoren wurde CEA nachgewiesen, 7 von diesen 18 Tumoren zeigten Lysozyme, darunter 5 auch noch Gastrin. In 4 Tumoren wurde hCG beobachtet, und in 2 aus dieser Reihe von 4 fand sich gleichzeitig Gastrin, CEA, Mucin sowie Lysozyme. Argentaffine Zellen wurden in 7 von 18 Tumoren beobachtet. Drei von 7 Gastrin enthaltende Tumoren hatten mehr oder weniger argentaffine Zellen. Elektronmikroskopisch wurden unterschiedliche Sekretgranula beobachtet und 9 von 18 Tumoren waren D1 oder P Zellen ähnlich. Makroskopisch entsprach die Mehrzahl der Tumoren dem IIc oder IIc+III Typ. Histologisch waren von diesen 18 Tumoren 6 gut differenzierte und 12 wenig differenzierte Adenocarcinome, einschließlich Siegelring-zellencarcinomen. Sie waren öfters im Fundusbereich jüngerer Frauen lokalisiert. Unter Heranziehung unserer schon publizierten Untersuchungsbefunde wird vermutet, daß IIc-Typ Argyrophilzellencarcinome mit dem histologischen Bild des wenig differenzierten Adenocarcinoms dem scirrhösen Carcinom zugeordnet werden kann.
    Notes: Summary Eighteen argyrophil cell carcinomas in 101 early gastric carcinomas were examined histologically, ultrastructurally, and immunohistochemically for polypeptides, carcinoembryonic antigen (CEA), lysozyme, and human chorionic gonadotrophin (hCG). Seven of these 18 tumors had gastrin, and two of seven tumors also contained somatostatin. In all of these 18 tumors CEA were demonstrated. Seven had lysozyme and five of seven tumors also contained gastrin; hCG were present in four of 18 tumors and two of four tumors had gastrin, CEA, mucin, and lysozyme simultaneously. Argentaffin cells were found in seven of 18 tumors. Of the above seven tumors containing gastrin, three had argentaffin cells. Ultrastructurally, several types of secretory granules were noted and tumor cells resembling D1-or P cells were present in nine of the 18 tumors. Macroscopically, many of the tumors showed IIc or IIc+III type. Histologically, the 18 tumors consisted of six well differentiated adenocarcinomas and 12 poorly differentiated adenocarcinomas including signet-ring cell carcinoma. These 12 tumors frequently developed in the stomach of young females. In view of our previous investigations, it was suggested that the IIc-type argyrophil cell carcinoma histologically showing poorly differentiated adenocarcinoma may be related to scirrhous carcinoma of the stomach.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 100 (1981), S. 1-12 
    ISSN: 1432-1335
    Keywords: Carcinoids ; Endocrine tumors ; Scirrhous carcinomas ; MNNG ; Carcinoide ; Endokrine Tumoren ; Scirrhöse Carcinome ; MNNG
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Durch orale Applikation von MNNG (N-methyl-N′-nitro-N-nitrosoguanidin) wurden Carcinoide im Drüsenmagen von Ratten erzeugt. Dreißig Wistar-Ratten wurde eine 70 μg/ml Lösung von MNNG 35 Wochen lang verabreicht, dann erhielten die Tiere 20–30 Wochen lang Leitungswasser. Bei vier von 20 weiblichen und zwei von zehn männlichen Tieren wurden Carcinoide im Drüsenmagen gefunden, Metastasen wurden nicht beobachtet. Die Tumoren waren vorwiegend im Fundusbereich entlang der großen curvatur lokalisiert. Histologisch zeigten die Carcinoide medullär-anaplastische Strukturen, die aus zwei Typen endokriner Zellen bestanden. Der erste Typ war Argentaffin und hatte elektronendichte, mäßig irreguläre Sekretgranula (437–810 nm); der zweite zeigte eine argyrophile Reaktion und hatte runde Sekretgranula mit elektronendichtem Core unter Ausbildung eines Halo (550 nm). Immunhistologische Untersuchungen (PAP-Methode) ergaben keine positiven Reaktionen am Zytoplasma der Tumorzellen gegenüber Antiseren von Gastrin, Insulin, Glucagon und Enkephalin. Einer dieser endokrinen Tumoren entwickelte sich weiter zum scirrhösen Carcinom; ein differenziertes Adenocarcinom des Drüsenmagens wurde nicht festgestellt.
    Notes: Summary A total of 30 inbred Wistar rats were orally administered 70 μg/ml solution of N-methyl-N′-nitro-N-nitrosoguanidine (MNNG) for 35 weeks and then tap water for the following 20 to 30 weeks. Four of the 20 females and two of ten males developed carcinoids in the glandular stomach, but no metastasis could be found. Carcinoids developed most frequently in the fundic portion along the greater curvature. Histologically, these tumors were medullary anaplastic carcinomas containing two different endocrine cell populations. The first cell type was argentaffin having electron-dense, somewhat pleomorphic secretory granules (437–810 nm) and the second type was argyrophil having round granules with a dense core and a pale halo (550 nm). None of these tumors showed endocrine immunoactivity for gastrin, somatostatin, insulin, glucagon, and enkephalin. One of these gastric tumors developed into scirrhous carcinoma, but differentiated adenocarcinoma could not be seen in the glandular stomach.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    International journal of infrared and millimeter waves 4 (1983), S. 549-559 
    ISSN: 1572-9559
    Keywords: interferometer ; polarimeter ; water-vapor laser ; far-infrared ; plasma diagnostics ; compact toroid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A high-power CW 27.972 μm water-vapor laser has been developed for interferometric and polarimetric measurements of plasmas. The maximum output power and the power density in the cavity of the laser with 2.0 cm bore and 220 cm length reach 85 mW and 109 μW/cm3, respectively. An interferometer using this laser is constructed and its performance is examined as a study on polarimetric method of magnetic field measurement. Preliminary interferometric experiments are also carried out on a compact toroidal plasma with field-reversal configuration.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    International journal of infrared and millimeter waves 2 (1981), S. 1199-1208 
    ISSN: 1572-9559
    Keywords: water vapor laser ; plasma diagnostics ; interferometer ; waveguide laser ; far-infrared
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A high-power CW 27.972 μm water vapor laser has been constructed in order to use as a light source of an interferometer for plasma diagnostics. The laser consists of 220 cm length and 2.0 cm small bore Pyrex glass discharge tube, semi-confocal resonator and Michelson coupler. From the measurement of cavity detuning curves, it is found that two waveguide modes, EH11 and EH21 oscillate. The increase of the output power is found to become more than seven times larger by adding He(50%)−H2(50%) mixed gas. Under the optimum condition, the maximum output power of 65 mW or the output power per unit cavity volume of 83 μW/cm3 is obtained.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    International journal of infrared and millimeter waves 5 (1984), S. 1039-1052 
    ISSN: 1572-9559
    Keywords: H2O laser ; Faraday rotation ; polarimetry ; far-infrared ; plasma diagnostics ; compact toroid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A fast response frequency-modulated interferometric polarimeter was designed and constructed with a single 28 μm H2O laser for high density plasma diagnostics. This newly developed modulation system employs an electro-magnetically driven movable mirror to achieve the modulation frequency beyound 1 MHz for about 100 μs duration. The movable mirror performance is studied experimentally in detail. The determination of the Faraday rotation angle is based on the zero-crossing method for the observed beat signals produced by two kinds of rotating plane-polarized waves. The feasibility of the polarimeter constructed was verified in experiments of a field-reversed thetapinch plasma.
    Type of Medium: Electronic Resource
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