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  • 1
    Electronic Resource
    Electronic Resource
    McArdle's syndrome. Fine structural changes in muscle (1977)
    Springer
    Acta neuropathologica 40 (1977), S. 11-19 
    Details
    ISSN: 1432-0533
    Keywords: McArdle's syndrome ; Histochemistry ; Electronmicroscopy ; Muscle pathology ; Muscle phosphorylase activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688569
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    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
    Keywords: Melipona ; Hymenoptera ; Apidae ; mandibular glands ; 2-heptanol ; skatole ; nerol ; undecane ; alarm response ; stingless bees
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988512
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    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
    Keywords: Defensive secretions ; formic acid ; Oxytrigona ; Hymenoptera ; Apidae ; stingless bees ; mandibular glands ; Meliponinae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020539
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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