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  • 1
    Electronic Resource
    Electronic Resource
    The influence of a planktivorous fish on zooplankton assemblages in experimental billabongs (2000)
    Springer
    Hydrobiologia 434 (2000), S. 1-9 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This paper discusses the influence of predation by a planktivorous fish on zooplankton assemblages within experimental billabongs. Results suggest that the presence of a small planktivorous fish in experimental billabongs had only a small influence on the structure of zooplankton assemblages and densities of rotifers. Microcrustacean populations were dominated by juveniles, however there were greater numbers of juveniles when the planktivorous fish were present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004008800955
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  • 2
    Electronic Resource
    Electronic Resource
    Ecology versus taxonomy: is there a middle ground? (1998)
    Springer
    Hydrobiologia 387-388 (1998), S. 451-457 
    Details
    ISSN: 1573-5117
    Keywords: taxonomic resolution ; ecological studies ; flooding ; Rotifera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In many long-term, intensive experimental and field studies there often arises a need to trade off taxonomic resolution for ecological answers. Compounding this problem is a taxonomic impediment, the lack of experienced taxonomists capable of processing large numbers of samples to species resolution, especially in groups such as the Rotifera. This paper has two aims: (1) To investigate the level of taxonomic resolution required to determine the impact of a disturbance, in the form of a flood event; (2) to compare the impact of different taxonomic resolutions in assessing biodiversity. Results suggest both family and generic resolution can be used to determine the impact of a flood event and that these levels have some applicability to biodiversity studies. Relatively inexperienced taxonomists who can identify the common rotifers to generic level, can be relied upon to detect disturbance to community structure but their data become unreliable when assessing biodiversity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1017032900009
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  • 3
    Electronic Resource
    Electronic Resource
    The possibility to distinguish chromosomes of Petunia hybrida by quinacrine fluorescence (1972)
    Springer
    Genetica 43 (1972), S. 589-596 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: A karyotype analysis of a diploid inbred line of Petunia hybrida stained with aceto-orcein is given. Five of the seven pairs of chromosomes can be identified by their relative lengths and arm ratios. The two remaining pairs stained with quinacrine show different fluorescence patterns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00115601
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  • 4
    Electronic Resource
    Electronic Resource
    A standard karyogram of Petunia hybrida hort (1973)
    Springer
    Genetica 44 (1973), S. 474-484 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An improved technique, viz., maceration with cellulase and pectinase, was applied in order to obtain chromosome preparations of botanical material suitable for fluorescence microscopy. The application of this method to Petunia hybrida allows the individual distinction of all chromosomes in mitosis. The following three criteria are required for this distinetion: the centromere index, the relative length, and the fluorescence intensity pattern after staining with Quinacrine. A standard karyogram is drawn up to render possible a comparison with other Petunia material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00161319
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  • 5
    Electronic Resource
    Electronic Resource
    The use of primary trisomics for the localization of genes on the seven different chromosomes ofPetunia hybrida. I. Triplo V (1975)
    Springer
    Genetica 45 (1975), S. 361-370 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Data on 3n×2n and 2n×3n crosses as a source of trisomics inPetunia are given. The delayed germination and retarded growth ofPetunia trisomics, in comparison with diploids, is mentioned. The application of recent fluorescence staining techniques to enzymatically macerated roottips made it possible to distinguish the seven chromosome pairs ofPetunia hybrida. With the aid of the standard karyogram, a number of primary trisomics could be identified. The origin of two primary trisomics is discussed. With these trisomics, some genetic factors, placed in linkage groups, have been localized on one of the chromosomes. This first localization concerns the linkage group, containing the geneUn (=Undulata) for flower shape. In a primary trisomic with the undulate flower shape, chromosome V proved to be present in triplicate. From the deviating ratios for the undulata character in crosses with this trisomic, it was concluded that the location of the linkage group containing the geneUn is on chromosome V.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01508311
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  • 6
    Electronic Resource
    Electronic Resource
    Ecology versus taxonomy: is there a middle ground? (1998)
    Springer
    Hydrobiologia 287-388 (1998), S. 451-457 
    Details
    ISSN: 1573-5117
    Keywords: taxonomic resolution ; ecological studies ; flooding ; Rotifera
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In many long-term, intensive experimental and field studies there often arises a need to trade off taxonomic resolution for ecological answers. Compounding this problem is a taxonomic impediment, the lack of experienced taxonomists capable of processing large numbers of samples to species resolution, especially in groups such as the Rotifera. This paper has two aims: (1) To investigate the level of taxonomic resolution required to determine the impact of a disturbance, in the form of a flood event; (2) to compare the impact of different taxonomic resolutions in assessing biodiversity. Results suggest both family and generic resolution can be used to determine the impact of a flood event and that these levels have some applicability to biodiversity studies. Relatively inexperienced taxonomists who can identify the common rotifers to generic level, can be relied upon to detect disturbance to community structure but their data become unreliable when assessing biodiversity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1017032900009
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  • 7
    Electronic Resource
    Electronic Resource
    Book reviews (1983)
    Springer
    Chromatographia 17 (1983), S. 456-456 
    Details
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262931
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  • 8
    Electronic Resource
    Electronic Resource
    Separation of hordein proteins from european barley by high-performance liquid chromatography: Its application to the identification of barley cultivars (1986)
    Springer
    Chromatographia 21 (1986), S. 49-54 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Reversed phase ; Ion-exchange ; Barley proteins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary High-performance liquid chromatography using either reversed phase or anion-exchange techniques was used for the fractionation of hordein proteins extracted from European barley. A reversed phase method is presented which utilises an Ultrapore column packed with a wide pore (30 nm) C-3 alkylbonded silica support. Using this method up to 20 components may be separated in 54 min. Elution profiles were found to be reproducible. A further method using rapid anion-exchange chromatography indicated that up to 13 components may be separated, a number which is comparable to that found with electrophoresis. The separation of proteins extracted from different barley cultivars indicated that on the basis of elution profiles high-performance liquid chromatography using either reversed phase or anion-exchange offers considerable potential as a method for barley cultivar identification.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02310595
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  • 9
    Electronic Resource
    Electronic Resource
    Concentration and determination of trace amounts of chlorinated pesticides in aqueous samples (1990)
    Springer
    Chromatographia 30 (1990), S. 129-134 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Trace enrichment ; Organochloro-pesticides ; Adsorption and aging of trace compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A method for the quantitative analysis of the organochloro-pesticides heptachlor, dieldrin, DDT and aldrin in water, using the HPLC technique of on-line trace enrichment, has been developed. A standard HPLC isocratic analytical system was employed the principle modification being the incorporation of a short pre-column across the sample loop connections of a Rheodyne 7125 valve to serve as the trace enrichment column. Pesticide recoveries of 〉95% were achieved at sample flow rate of 5–15 ml/min by employing stainless steel fittings throughout the system and with 5% methanol included in the pesticide sample reservoir. The pesticides were concentrated onto a 50 mm, 10 μm Spherisorb ODS column; analysis was performed on a 25 cm, 5 μm Spherisorb ODS column with methanol-water (75∶25) elution; detection was by UV absorption measurement at 220 mm and 0.64 AUFS. Resolution achieved was 〉=1.16 and selectivity 〉=1.14. 100 ml aqueous samples allow ppb detection of the named pesticides in real samples. Total analysis time including concentration and chromatography was less than 30 minutes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02274533
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  • 10
    Electronic Resource
    Electronic Resource
    High performance liquid chromatography advances and perspectives vol. 1 (1981)
    Springer
    Chromatographia 14 (1981), S. 374-374 
    Details
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259240
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