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  • 35Cl nuclear magnetic resonance  (1)
  • Carcinoma of the esophagus  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Argyrophil cell carcinoma (apudoma) of the esophagus (1976)
    Springer
    Virchows Archiv 371 (1976), S. 283-294 
    Details
    ISSN: 1432-2307
    Keywords: Carcinoma of the esophagus ; Apudoma ; Oat cell carcinoma ; Amyloid ; Argyrophil cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In a series of 79 cases of primary esophageal carcinoma resected at The Center for Adult Diseases, Osaka, there were six tumors with specific histopathologic features valid for the diagnosis of argyrophil cell carcinoma. Of the 6 tumors, 3 were studied electron microscopically and assay for ACTH content was performed on 4 tumors. Clinically, the ages of the 6 patients ranged from 56 to 71 years; two were women and four men. Four of the 6 patients died with widespread tumor recurrences within 9 months of operation. Microscopically, the 6 tumors were composed largely or almost entirely of small, spindle-shaped cells resembling those of oat cell carcinoma of the lung, and were characterized by the arrangement of tumor cells in solid sheets or anastomosing cords, the presence of argyrophil tumor cells, and the deposits of amyloid. Electron microscopically, the three tumors contained neurosecretory-type granules. Using bioassay or radioimmunoassay ACTH activity in the tumor tissues was detected in 3 out of the 4 tumors determined. From the light and electron microscopic characteristics and the assay evidence, it seems reasonable to conclude that the 6 tumors are endocrine polypeptide producing tumors (apudomas) that arise from argyrophil cells normally found among the basal cells of the esophageal mucosa, and that they represent a distinct histopathologic entity clearly distinguishable from other types of esophageal carcinomas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00428049
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  • 2
    Electronic Resource
    Electronic Resource
    A calorimetric study of the acid dissociation of the conjugate acids of poly(N-vinylimidazole) and polyallylamine (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 1-7 
    Details
    ISSN: 1435-1536
    Keywords: Key words Poly(N-vinylimidazole) ; Polyallylamine ; Acid-dissociation equilibria ; Calorimetric titration ; 35Cl nuclear magnetic resonance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Thermodynamic parameters for acid dissociation of the conjugate acids of poly(N-vinylimidazole) and polyallylamine have been determined in the presence of sodium chloride and sodium nitrate. Even though the plots of ΔG 0 against the degree of dissociation, α, are highly dependent on the added salt concentration levels, the concentration effect has never been observed for the corresponding ΔH 0 versus α plots. The effect on the ΔG 0 versus α plots has been attributed to the entropy change of the counterions between a polyelectrolyte phase and a bulk solution phase. The α dependency of ΔH 0 is affected remarkably by the kinds of cationic polymers and counter-anions. Each ΔH 0 value at completely neutralized conditions is quite close to the corresponding ΔH 0 value of the monomer analog. The difference in the ΔH 0 values at fully charged conditions has been explained by the heats due to The ion-pair formation of chloride anion to the conjugate acids of poly(N-vinylimidazole) and polyallylamine has been supported by 35Cl NMR measurement. It has also been suggested that chloride anions bind the basic polymer molecules even at fully neutralized conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050001
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    Paper (German National Licenses)
    Fulltext
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