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  • 1
    Electronic Resource
    Electronic Resource
    Sector and oscillatory zoning in calcic augites from M. Etna, Sicily (1974)
    Springer
    Contributions to mineralogy and petrology 47 (1974), S. 187-196 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Single whole crystals of calcic augite from M. Etna, Sicily, which display both sector and oscillatory zoning, have been serially sectioned and the form of the sectors mapped out. The principal intersectorial chemical variation is shown to be that of Ti and Al by as much as 39% (cation %) change in each, and the least variation, that of Ca (showing a 0.77 to 3.20% change). For each of three isochronous surfaces the ratio of Ti∶Al is shown to be individually constant no matter what the sector and this is thought to indicate near equilibrium conditions at the crystal/liquid interface. In addition to sector zoning these crystals display two types of concentric banding, having dimensions of about 0.25 mm, 20 μm. The 20 μm banding is shown to be both optically and chemically oscillated. Relative diffusion rates of cationic species in the melt, and growth rates of crystal faces are thought to play an important role in the formation of the oscillations, and the sector zoning.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00371538
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  • 2
    Electronic Resource
    Electronic Resource
    Sources of organic nitrogen, phosphorus and carbon in antarctic streams (1986)
    Springer
    Hydrobiologia 134 (1986), S. 215-225 
    Details
    ISSN: 1573-5117
    Keywords: Antarctica ; carbon ; glaciers ; nitrogen ; phosphorus ; streams
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Dissolved and particulate organic materials were analysed in 14 streamwaters of the McMurdo Sound region of Antarctica. These streams are fed by glacial meltwaters and pass through catchments largely devoid of terrestrial vegetation. Nonetheless they contained measurable amounts of organic material in both dissolved and particulate form. Most of the dissolved organic carbon (DOC) values lay in the range 1–3 g C m−3. Higher values were recorded close to penguin rookeries on the coast. Dissolved organic nitrogen (DON) concentrations were generally two orders of magnitude less than DOC and in flowing waters with rich blue-green algal growth DON increased with distance downstream. Dissolved organic phosphorus levels were generally much lower than DON, but highly variable. Particulate organic carbon concentrations (both fine and coarse) were unexpectedly high. Five sources of organic matter were identified: birdlife (only near the coast), autochthonous algal production (especially important for DON), streambed soils (important at first flows), lacustrine and marine sediments, through which certain streams and glaciers cut, and the glacial ice, which received organic input from wind-blown particulates, snowfall and the underlying bedrock of sedimentary origin. Highest organic levels were recorded in the first melt down the glacier face, suggesting that winter deposition of organic materials may be especially important.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00008490
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  • 3
    Electronic Resource
    Electronic Resource
    Parasitus bituberosus (Acari: Parasitidae): An agent for control ofLycoriella solani (Diptera: Sciaridae) in mushroom crops (1991)
    Springer
    Experimental and applied acarology 11 (1991), S. 159-166 
    Details
    ISSN: 1572-9702
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In trials conducted in a mushroom crop grown in commercial growing bags and inoculated with the dipteran pest,Lycoriella solani, and/or the predatory miteParasitus bituberosus, the mite reduced adult pest numbers ty 50–66%. It also reduced the numbers of larvalHeteropeza pygmaea, a second dipteran pest which occurred as a contaminant in one trial. Fewer mites were extracted towards the end of the cropping period. No evidence was found of an oscillating relationship between predator and prey over the trial period. Crop yield was increased by 18% and unsaleable yield was reduced by 50%. It is suggested that the mite can contribute to an integrated pest management system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01246088
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  • 4
    Electronic Resource
    Electronic Resource
    Parasitus bituberosus (Acari: Parasitidae), a possible agent for biological control ofHeteropeza pygmaea (Diptera: Cecidomyiidae) in mushroom compost (1990)
    Springer
    Experimental and applied acarology 8 (1990), S. 13-25 
    Details
    ISSN: 1572-9702
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The prey items accepted byParasitus bituberosus Karg included all immature instars ofHeteropeza pygmaea Winnertz, first and second instars ofLycoriella solani together with its eggs, and compost nematodes and springtails. A preference was shown by deutonymphs for first-instarH. pygmaea, whereasHistiostoma feroniarum andPygmephorus sp. were not accepted. Adult mites, especially females, appeared to be even more voracious predators on first-instarH. pygmaea than were deutonymphs or protonymphs. The mite preventedH. pygmaea from reaching high populations in both laboratory-scale and small commercial-scale compost units; it also reduced populations of free-living nematodes in the latter. The distributions ofH. pygmaea and the mite throughout the compost in growing-bags were investigated and found to parallel each other. The mite was able to penetrate all parts of the compost. There was no evidence that it damagedAgaricus bisporus, and it was never found on harvested caps.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01193378
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  • 5
    Electronic Resource
    Electronic Resource
    Monoclonal antibodies against plant proteins recognise animal intermediate filaments (1987)
    New York, NY : Wiley-Blackwell
    Cell Motility and the Cytoskeleton 8 (1987), S. 312-323 
    Details
    ISSN: 0886-1544
    Keywords: plant cytoskeleton ; Chlamydomonas ; anti-IFA ; onion root tip cells ; immunoflurescence ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Four monoclonal antibodies were raised against polypetides present in a highsalt detergent-insoluble fraction from cells of Chlamydomonas reinhardtii. Indirect immunofluorescence microscopy of fibroblasts and epithelial cells grown in culture using these plant antibodies revealed staining arrays identical to those obtained with well characterised antibodies to animal intermediate filaments. Immunoflurescence microscopy of Chlamydomonas with these monoclonal antibodies and a monoclonal antibody that recognises all animal intermediate filaments (anti-IFA) gave a diffuse, patchy cytoplasmic staining pattern. Both the plant antibodies and anti-IFA stained interphase onion root tip cells in a diffuse perinuclear pattern. In metaphase through to telophase, the labelling patterns colocalised with those of microtubules. Labelling of the phragmoplast was also detected but not staining of the preprophase band. On Western blots of various animal cell lines and tissues, all the antibodies labelled known intermediate filament proteins. On Western blots of whole Chlamydomonas proteins, all the antiboides labelled a broad band in the 57,000 Mr range, and three antibodies labelled bands around 66,000 and 140,000 Mr but with varibale intensites. On Western blots of whole onion root tip proteins, all the antibodies labelled 50,0000 Mr (two to three bands) polypetides and a diffuse and around 60,000 Mr and three of the antibodies also labelled several polypeptides in the 90,000-200,000 Mr range. The consistent labelling of these different bands by several different monoclonal antibodies recognising animal intermediate filaments makes these polypetides putative plant intermediate filament proteins.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cm.970080404
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  • 6
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    Sources of organic nitrogen, phosphorus and carbon in antarctic streams (1986)
    Springer
    Details
    Publication Date: 1986-03-01
    Print ISSN: 0018-8158
    Electronic ISSN: 1573-5117
    Topics: Biology
    Published by Springer
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  • 7
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    Sector and oscillatory zoning in calcic augites from M. Etna, Sicily (1974)
    Springer
    Details
    Publication Date: 1974-01-01
    Print ISSN: 0010-7999
    Electronic ISSN: 1432-0967
    Topics: Geosciences
    Published by Springer
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