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  • 1990-1994  (2)
  • 1993  (2)
  • Natural pterins  (1)
  • bamboo  (1)
  • Anti-ganglioside antibodies
  • 1
    Electronic Resource
    Electronic Resource
    Flood control by ants: a Southeast Asian bamboo-dwellingTetraponera (Formicidae, Pseudomyrmecinae) bails water from its internode nests (1993)
    Springer
    Insectes sociaux 40 (1993), S. 115-118 
    Details
    ISSN: 1420-9098
    Keywords: Tetraponera ; bamboo ; ants ; nest flooding ; water removal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The Southeast Asian antTetraponera sp. nearattenuata F. Smith inhabits internodes of large bamboo species that it shares with symbiotic pseudococcids. It finds access to this nesting habitat via small holes made by wood-boring insects. During heavy rain, runoff water collects in these punctured internodes. TheTetraponera workers remove the water by ingesting it, walking to the entrance hole, and regurgitating it to the outside. In this way, they 1) reduce the danger of colony members drowing, 2) enable their symbionts to feed also on the internode floor, and 3) prevent excessive growth of microbes in the nest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01338838
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Enantiomeric separation of biopterin and neopterin stereoisomers by chiral HPLC. Application to the identification of natural pterins in protozoans (1993)
    Springer
    Chromatographia 36 (1993), S. 71-74 
    Details
    ISSN: 1612-1112
    Keywords: Ligand exchange chromatography ; Chiral mobile phase ; Enantiomer separation ; Natural pterins ; Colpidium campylum ; Astasia longa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The separation of the D and L enantiomers of biopterin and neopterin has been achieved by ligand exchange chromatography using a reversed phase column with a mobile phase containing D-phenylalanine as chiral modifier and Cu(II) as the metal ion. This successful separation has enabled the identification of natural pterins present in various protozoans by comparison with authentic, optically pure compounds. D-monapterin and D-neopterin were identified in the ciliate protozoanColpidium campylum. L-biopterin has been found, for the firs time, in a flagellate protozoan,Astasia longa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02263840
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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