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  • 1
    Electronic Resource
    Electronic Resource
    Gear selectivity and the conservation of fish (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 37 (1990), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1990.tb05060.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Pentachlorophenol distribution in a fresh water ecosystem (1977)
    Springer
    Bulletin of environmental contamination and toxicology 18 (1977), S. 251-258 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Summary The results of this investigation have shown that PCP persisted in leaf litter and sediments for at least seventeen months following contamination. This persistence provides a potential for continuous contamination of the water column and biological magnification via detritus- and benthic-feeding organisms. An investigation of these factors is presently underway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01686075
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Adding equality to semantic tableaux (1987)
    Springer
    Journal of automated reasoning 3 (1987), S. 225-246 
    Details
    ISSN: 1573-0670
    Keywords: Theorem proving ; semantic tableaux ; first-order logic with equality ; partial unification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract An extension to the system of semantic tableaux to deal with first-order logic with equality is introduced and proved sound and complete. This involves the use of partial unification, an operation which is based on unification without the presence of variables. We show, further, that semantic tableaux with partial unification provide a sound and complete proof method without needing the functionally reflexive axioms. We also give an example of an ordering rule which allows us to provide less complex proofs in the ground case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00243790
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Phenotypic differences in anthocyanin accumulation among clonally related cultured cells of carrot (1990)
    Springer
    Plant cell, tissue and organ culture 22 (1990), S. 213-222 
    Details
    ISSN: 1573-5044
    Keywords: anthocyanin accumulation ; cell clones ; chalcone synthase ; Daucus carota ; intermediates in biosynthesis ; phenotypes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Subclones from a wild carrot cell culture have been examined for their anthocyanin accumulation in the absence and presence of DMSO and 4-coumaric acid, naringenin, dihydroquercetin or leucocyanidin. Subclones that accumulate no or extremely low levels of anthocyanin do not increase their anthocyanin accumulation when treated with DMSO or intermediates. These compounds increased the anthocyanin accumulation in subclones which produce detectable anthocyanin in their absence. Chalcone synthase was shown to be present in clones and the activity showed no correlation with the amount of anthocyanin accumulated. This suggests that the enzymes of anthocyanin biosynthesis are not coordinately repressed in the subclones which accumulate little or no anthocyanin. Dihydroquercetin and catechin were present in subclones with little or no anthocyanin but no procyanidin was detected which suggests that these subclones biosynthesize leucocyanidin but do not convert it into colorless procyanidins as a major alternative metabolic pathway to anthocyanin biosynthesis. The possibility that some clones are not anthocyanin accumulating because they have impaired transport of the sinapoylated anthocyanin into the vacuole is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00033639
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    Paper (German National Licenses)
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