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  • stingless bees  (2)
  • Associative learning  (1)
  • CNS tumor  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Differences in performance on a reversal learning test and division of labor in honey bee colonies (2000)
    Springer
    Animal cognition 3 (2000), S. 119-125 
    Details
    ISSN: 1435-9456
    Keywords: Key words Proboscis extension reflex ; Associative learning ; Social insects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We studied the association between honey bee (Apis mellifera) division of labor and performance on an olfactory reversal-learning test. Manipulations of colony age structure and flight experience were used to test whether differences in performance are associated with age, current behavioral state, or flight experience. Nurse bees showed significantly faster rates of extinction to a learned odor than did foragers. This difference was associated primarily with differences in behavioral state, rather than age; it was seen when comparing nurses and foragers from typical colonies and normal-age nurses and precocious foragers from single-cohort colonies. Differences in extinction rate were not related to differences in flight experience; there was no difference between foragers and foraging-age bees denied flight experience. These results suggest that changes in learning and memory occur in association with division of labor. We speculate on the possible functional significance of the difference in extinction rate between nurses and foragers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100710000068
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Immunofluorescent staining of frozen sections for glial fibrillary acidic protein (1982)
    Springer
    Acta neuropathologica 58 (1982), S. 69-72 
    Details
    ISSN: 1432-0533
    Keywords: GFAP ; Glioma ; Biopsy ; Astrocytoma ; CNS tumor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692700
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    Paper (German National Licenses)
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  • 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
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    Paper (German National Licenses)
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  • 4
    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
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