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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 117 (1986), S. 1047-1055 
    ISSN: 1434-4475
    Keywords: Amphetamins ; Anorectics ; Antiobesity ; CNS stimulants ; Phendimetrazine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Nach oralen Dosen von Phendimetrazin an Menschen wurde im Harn unverändertes Phendimetrazin, der N-demethylierte Metabolit, Phenmetrazin und das N-Oxid von Phendimetrazin, nicht jedoch N-Hydroxyphenmetrazin gefunden; die Metaboliten wurden mittels TLC und GLC identifiziert. Die Stabilität von Phendimetrazin und dessen Metaboliten wurde in biologischen Flüssigkeiten und in Ether untersucht. Es wurde eine gaschromatographische Methode für die quantitative Bestimmung von Phendimetrazin, seinem N-Oxid und Phenmetrazin in Harn, Plasma und Speichel entwickelt, wobei das N-Oxid vor der Analyse reduziert wurde.
    Notes: Abstract In urine, after oral doses of phendimetrazine to man, were found unchanged drug, the N-demethylated metabolite, phenmetrazine, and the N-oxide of phendimetrazine, but not N-hydroxyphenmetrazine; the metabolites were identified using t.l.c. and g.l.c. The stability of the drug and its metabolites in biological fluids and in ether was studied. A gas chromatographic procedure for the quantitative determination of unchanged drug, its N-oxide and phenmetrazine in urine, plasma and saliva was developed, the N-oxide being reduced before analysis.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Protoplasma 111 (1982), S. 28-37 
    ISSN: 1615-6102
    Keywords: Frozen-hydrated ; Low temperature SEM ; Uredium ultrastructure ; Uromyces viciae-fabae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The ultrastructure of uredia, intercellular and intracellular hyphae ofUromyces viciae-fabae onVicia faba has been studied by scanning electron microscopy of frozen-hydrated material. Frozen-hydrated leaves will readily fracture and can be viewed on the cold stage of the microscope at liquid nitrogen temperatures for several hours without visible surface changes occurring. Both fungal and host-plant cells show a high degree of morphological preservation with little or no loss of cell contents and with minimal signs of shrinkage. Intracellular hyphae may be filamentous and branched or short and lobed. They are constricted at the point of entry into the host cell. Intercellular matrix material is well preserved around developing pedicels and urediospores and may act as a lubricant. The technique described is very quick compared with conventional preparatory procedures.
    Type of Medium: Electronic Resource
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