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  • 1980-1984
  • 1975-1979  (6)
  • 1975  (6)
  • Inorganic Chemistry  (3)
  • Physics  (2)
  • Blind loops  (1)
  • Nuclear reactions
  • 1
    Electronic Resource
    Electronic Resource
    Functional, biochemical and morphological alterations in the intestines of rats with an experimental blind-loop syndrome (1975)
    Springer
    Research in experimental medicine 166 (1975), S. 67-78 
    Details
    ISSN: 1433-8580
    Keywords: Blind loops ; mucosal transformation ; bile acids ; octanoate transport ; Blindsack ; zonaler Schleimhautumbau ; Gallensäuren ; Octanoatresorption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In der vorliegenden Arbeit wird über funktionelle Störungen der Dünndarmschleimhaut selbstfüllender Blindsäcke und angrenzender Darmabschnitte bei der Ratte berichtet, die mit erheblichen morphologischen Änderungen einhergehen. Diese bestehen in einer Schleimhauthypertrophie, wobei das Verhältnis von Zottenlängen zu Kryptentiefen als Ausdruck eines zonalen Schleimhautumbaus reduziert ist. Verschiedene Bürstensaumenzymaktivitäten des Resorptionsepithels und die in vivo gemessene Octanoatresorption sind herabgesetzt. Das Verhältnis intraluminaler freier zu konjugierter Gallensäuren ist erwartungsgemäß hochgradig zugunsten freier Gallensäuren verschoben. Zwei Mechanismen werden zur Erklärung der beobachteten Dünndarmschleimhautveränderungen diskutiert: 1. ein direkter toxischer Effekt freier Gallensäuren oder durch bakterielle Zersetzung entstandener toxischer Metabolite auf das Resorptionsepithel, 2. eine herabgesetzte Reifung als Folge der Wirkung des veränderten intraluminalen Milieus auf die Lebensdauer des Oberflächenepithels.
    Notes: Summary In rat self-filling blind loops and in the contiguous regions of the intestinal tract, considerable functional impairment, accompanied by pronounced morphological transformations of the mucosa, has been observed. The histological alterations consist of mucosal hypertrophy and a reduction in the villus height: crypt length ratio, which is indicative of a hyper-regenerative change. Various enzyme activities of the epithelial cells are reduced and the absorption of octanoate in vivo is diminished. The ratio of free: conjugated bile acids in the intestinal juices is greatly altered in favour of the free acids. Two mechanisms have been discussed in relation to the observed mucosal changes: 1. A direct effect of the free bile acids, or metabolites from bacterial degradation, on the absorptive epithelium; 2. Reduced cellular maturity in response to the effect of bile acids and/or bacteria on the lifespan of the cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01851347
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  • 2
    Electronic Resource
    Electronic Resource
    Di- und Polyaminozucker, XXI. Synthese von Derivaten der 2,4-Diamino-2,3,4-tridesoxy-D-ribo-hexose (1975)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 3397-3411 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Di-and Polyamino Sugars, XXI. Synthesis of Derivatives of 2,4-Diamino-2,3,4-trideoxy-D-ribo-hexoseStarting with D-glucose the title compound has been synthesized as its di-N-acetyl. -trifluoroacetyl and N,N′-bis(2,4-dinitrophenyl) derivative. The free sugar could not be obtained in a pure state.
    Notes: Die Titelverbindung wurde, ausgehend von D-Glucose, in Form ihres Di-N-acetyl-, -trifluoracetyl- und ihres N,N′-Bis(2,4-dinitrophenyl)-Derivates erhalten. Reindarstellung des freien Zuckers gelang nicht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19751081031
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  • 3
    Electronic Resource
    Electronic Resource
    Heterocyclische Siebenring-Verbindungen, XVI. Synthese gezielt 3,5-substituierter 4-Phenyl-1-benzothiepine (1975)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 3596-3610 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Heterocyclic Seven-membered Ring Compounds, XVI. Synthesis of 3,5-Substituted 4-Phenyl-1-benzothiepins4-Phenyl-1-benzothiepins 7 and 8 are synthesized starting from their 5-methoxy-2,3-dihydro-precursor 2; using the 2,5-dihydro-intermediate 12 yields the 4-phenyl-1-benzothiepins 13 and 14. The 1-benzothiepin 17 can be obtained from the diketone 1 directly. The 3-cyano-substituted compound 22 is prepared from its 2,5-dihydro-precursor 21. Some ring-contraction and ring-cleavage reactions of the heterocyclic seven-membered ring-system are described.
    Notes: Die 5-Methoxy-2,3-dihydro-Vorstufe 2 wird in die 4-Phenyl-1-benzothiepine 7 und 8 übergeführt; aus der 2,5-Dihydro-Vorstufe 12 werden die 4-Phenyl-1-benzothiepine 13 und 14 dargestellt. Das 1-Benzothiepin 17 wird direkt aus dem Siebenring-Diketon 1 erhalten. Das 3-cyan-substituierte 1-Benzothiepin 22 erhält man aus der 2,5-Dihydro-Vorstufe 21. Es werden einige Ringverengungsbzw. Ringspaltungsreaktionen des heterocyclischen Siebenring-Systems beschrieben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19751081121
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  • 4
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie des Indols, VIII. Decarboxylierungen einiger 1-Alkyl-2-carboxy-3-indolessigsäuren sowie Synthese eines 5-Thiocyanato-2,3-dihydroindols (1975)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 3538-3542 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Not mentioned2a-d, easily produced from the N-alkyl-N-phenylhydrazines 1a-d and 2-oxoglutaric acid, are decarboxylated to the compounds 4a-d in high yields. 2a is reduced to the 2,3-dihydro compound 3a and reacts via the amide 5a to the 5-thiocyanato derivative 6a.
    Notes: Contributions to the Chemistry of Indole, VIII. Decarboxylations of Some 1-Alkyl-2-carboxy-3-indolacetic Acids and Synthesis of a 5-Thiocyanato-2,3-dihydroindole-d, leicht darstellbar aus N-Alkyl-N-phenylhydrazin und 2-Oxoglutarsäure, werden mit hoher Ausbeute zu 4a-d decarboxyliert. 2a wird zum Dihydroindol 3a reduziert und über das Amid 5a zum 5-Thiocyanatoderivat 6a umgesetzt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19751081115
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  • 5
    Electronic Resource
    Electronic Resource
    Ion clustering studies in poly(butadiene-styrene-4-vinylpyridine) crosslinked by iron (III) chloride. Differential enthalpic analysis and electron microscopy (1975)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 13 (1975), S. 1881-1891 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A terpolymer of butadiene-styrene-vinylpyridine has been crosslinked by addition of iron chloride. Differential enthalpic analysis gives evidence of a two-phase system. Electron microscope studies at 0.1 and 1 MeV show the existence of precipitates. The majority of these ironrich aggregates have diameters less than 100 Å. Their form is polyhedral but very nearly spherical. No crystallinity has been detected inside the clusters. Thus the existence of strong interactions as in crystals of FeCl3 hydrates is excluded.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1975.180131003
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  • 6
    Electronic Resource
    Electronic Resource
    Crosslinking of elastomers by coordination bonding. Study of clustering of the coordination complexes by Mössbauer spectroscopy (1975)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 13 (1975), S. 1057-1061 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1975.180130517
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