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  • Hymenoptera  (3)
  • Astrocytoma  (1)
  • Electronmicroscopy  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Immunofluorescent staining of frozen sections for glial fibrillary acidic protein (1982)
    Springer
    Acta neuropathologica 58 (1982), S. 69-72 
    Details
    ISSN: 1432-0533
    Schlagwort(e): GFAP ; Glioma ; Biopsy ; Astrocytoma ; CNS tumor
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Immunofluorescent staining for glial fibrillary acidic protein (GFAP) has been used as part of the diagnostic evaluation of eleven patients and compared with routine special stains. In one case, a difficult fibrillary neoplasm of the spinal cord, this diagnostic procedure provided rapid, positive identification of the glial nature of the tumor. In all cases, the GFAP reactivity was consistent with staining properties of PTAH and more rapid than PTAH.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692700
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    McArdle's syndrome. Fine structural changes in muscle (1977)
    Springer
    Acta neuropathologica 40 (1977), S. 11-19 
    Details
    ISSN: 1432-0533
    Schlagwort(e): McArdle's syndrome ; Histochemistry ; Electronmicroscopy ; Muscle pathology ; Muscle phosphorylase activity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Two cases of McArdle's syndrome are reported. One is a “classical” exaple; the other is unusual because of the in vitro presence of muscle phosphorylase activity. In the latter case. the electronmicroscopic investigation confirmed the diagnosis. The fine structural changes characteristic of this disease are summarized and it is concluded that histochemical studies alone are insufficient to exclude the diagnosis of McArdle's myopathy.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00688569
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  • 3
    Digitale Medien
    Digitale Medien
    Formic acid in caustic cephalic secretions of stingless bee,Oxytrigona (Hymenoptera: Apidae) (1987)
    Springer
    Journal of chemical ecology 13 (1987), S. 1079-1086 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Defensive secretions ; formic acid ; Oxytrigona ; Hymenoptera ; Apidae ; stingless bees ; mandibular glands ; Meliponinae
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract The cephalic extracts of two species in the stingless bee genusOxytrigona were analyzed. Extracts made in diethyl ether, and then derivatized with diphenyldiazomethane, revealed large quantities of formic acid, potentially a major defensive secretion of this stingless bee group. We additionally identify several hydrocarbons, aldehydes, ketones, and acetates. Novel diketones identified by others were detected in both species.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01020539
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  • 4
    Digitale Medien
    Digitale Medien
    Mandibular glands of stingless bees (Hymenoptera: Apidae): Chemical analysis of their contents and biological function in two species ofMelipona (1983)
    Springer
    Journal of chemical ecology 9 (1983), S. 1465-1472 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Melipona ; Hymenoptera ; Apidae ; mandibular glands ; 2-heptanol ; skatole ; nerol ; undecane ; alarm response ; stingless bees
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Workers ofMelipona fasciata andM. interrupta triplaridis respond to their respective mandibular gland extracts with alarm recruitment and defensive behavior. Workers rapidly exit from the nest entrance, land on an intruding object, and bite with the mandibles while vibrating the flight muscles. These behaviors are accompanied by the release of the contents of the mandibular glands. Colonies of both species exhibited greater response to their own mandibular gland extracts than to those of other stingless bee species. Chemical analysis identified 2-heptanol as the major component in hexane extracts of each species. Undecane was a constituent of both species; skatole and nerol were identified only in extracts ofM. i. triplaridis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00988512
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  • 5
    Digitale Medien
    Digitale Medien
    Identification and bioassay of macrocyclic lactone sex pheromone of the halictine beeLasioglossum zephyrum (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 1447-1456 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Lasioglossum zephyrum ; Halictidae ; Hymenoptera ; macrocyclic lactones ; sex pheromones ; kin recognition pheromones ; Dufour's gland
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract The macrocyclic lactones found in the Dufour's gland of the halictine beeLasioglossum zephyrum are female sex pheromones. Octadecanolide, eicosanolide, docosanolide, and tetracosanolide, as well as monounsaturated homologs of each, are components of the Dufour's gland secretion of this species. Furthermore, a series of odd-carbon-numbered saturated and unsaturated hydrocarbons and isopentenyl docosanoate occur in extracts of the Dufour's gland and of whole females. Two different mixtures of all four synthetic lactones, and additionally a treatment consisting of the natural extract, elicit higher response levels than two of the lactones separately or either of the controls.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01012144
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