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  • Analyse von Aminosäuren undα-Ketosäuren  (1)
  • Hypothalamus  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 302 (1978), S. 341-343 
    ISSN: 1432-1912
    Keywords: Cyclic AMP ; Hypothalamus ; Genetically hypertensive rats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In genetically hypertensive rats an altered catecholamine content of hypothalamic structures has been reported. In the present study cAMP was estimated in the hypothalamus and cortex of genetically hypertensive rats and compared with normotensive controls of the same strain. It is shown, that the cAMP content of the hypothalamus of the hypertensive animals was decreased to about 60% of control values, whereas there was no difference of the cAMP content in the cortical regions of the same animals. These results indicate an alteration of the adenyl cyclase-cAMP-phosphodiesterase system in hypothalamic structures of genetically hypertensive rats.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1618-2650
    Keywords: Analyse von Aminosäuren undα-Ketosäuren ; Chromatographie ; Ionenaustausch ; Pyridoxylderivate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Zur Analyse von Aminosäuren werden deren Pyridoxylderivate hergestellt und durch Flüssigkeits-Chromatographie getrennt. Die Bestimmung im Eluat erfolgt über die UV- oder Fluorescenzspektren oder durch Aktivitätsmessung, wenn radioaktives NaBT4 bei der Darstellung verwendet wird. Diese letzte Methode ist die empfindlichste. Die Empfindlichkeit kann bis zu 10−13 Mol gesteigert werden (Fehler ± 5%). Das Verfahren kann ebenfalls für die Analyse vonα-Ketosäuren eingesetzt werden.
    Notes: Abstract The synthesis of pyridoxyl-amino acids and their separation by liquid chromatography is described. The determination of the compounds in the eluate can be performed optically via the UV- or fluorescence spectra or radiochemically by activity measurement when radioactive NaBT4 is used in the preparation. The latter method is the most sensitive one. Sensitivity can be increased up 10−13 Mol (error ± 5%). The procedure described can also be applied to the separation and determination ofα-keto acids.
    Type of Medium: Electronic Resource
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