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  • 11
    Electronic Resource
    Electronic Resource
    Monoclonal antibodies against carbohydrate differentiation antigens identify subsets of primary sensory neurones (1984)
    [s.l.] : Nature Publishing Group
    Nature 311 (1984), S. 469-472 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We used monoclonal antibodies to preimplantation murine embryos and human embryonal carcinoma cells, which recognize the developmentally-regulated stage-specific embryonic antigens, SSEA-3 and SSEA-46"8. These antigens have been characterized as overlapping carbohydrate epitopes on globo-series ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/311469a0
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  • 12
    Electronic Resource
    Electronic Resource
    Endocrinology of Reproduction in the River Lamprey (1963)
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 715-716 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The experimental animals were obtained from the River Severn and kept in well-aerated running tap-water. Hypophysectomy was carried out as previously described2 on a large number of individually marked lampreys, biopsy specimens of gonad from both hypophysectomized and sham-operated control animals ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/197715a0
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  • 13
    Electronic Resource
    Electronic Resource
    A study of species richness and diversity in seed banks and its use for the environmental mitigation of a proposed holiday village development in a coniferized woodland in south east England (1997)
    Springer
    Biodiversity and conservation 6 (1997), S. 1413-1428 
    Details
    ISSN: 1572-9710
    Keywords: ancient woodland indicator species ; conservation ; management ; restoration ; soil seed bank
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A survey was carried out to determine the density and species composition of germinable seed in the surface soil layers of 30 plots within a coniferized lowland woodland in East Kent in order to establish the resources available for habitat creation in the event of some areas being modified during a proposed holiday village development. The selected plots included conifer plantations (up to 69 years old), broad-leaved plantations and the semi-natural broad-leaved edges that remain on parts of the perimeter of the site which were used as the control. A total of 13 682 seedlings emerged from the soil samples during the four-month germination trials. Fifty-two species were identified of which eight were ancient woodland indicator species for south-east England. The most abundant species represented in the seed banks were: Juncus effusus, Rubus fruticosus, Carex sylvatica, Betula pendula and Agrostis tenuis. Between-site comparisons of coniferous plots of different ages revealed a marked reduction in the seed species and seed density in plantations over 65 years old. Results of soil nutrient and texture analyses ruled out the likelihood of edaphic factors being responsible for between-site differences in seed bank composition. Seed species richness and diversity (Shannon-Wiener diversity index) were greatest in the semi-natural broad-leaved edges, but the diversity index used also showed that two replanted conifer sites had high values despite few species being present. The usefulness and limitations of diversity indices in the context of seed bank studies is discussed. From the results of the study, management proposals for the site have been put forward in order to maintain floristic diversity and mitigate the impact of the proposed development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018345915418
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  • 14
    Electronic Resource
    Electronic Resource
    Low-mass lepton-pair production in p-Be collisions at 450 GeV/c (1995)
    Springer
    The European physical journal 68 (1995), S. 47-64 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report on the production of low-mass electron pairs and muon pairs in p-Be collisions at 450 GeV/c at the CERN SPS. For both electron and muon pairs the low-mass spectrum can be explained satisfactorily by lepton pairs from hadronic decays, and there is no need to invoke any “unconventional” source. The normalisation of the major hadronic sources is set by the data. The upper limit, at 90% confidence level, on any new source of lepton pairs is ∼20% of the hadronic decay contribution for muons, and ∼40% for electrons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01579804
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  • 15
    Electronic Resource
    Electronic Resource
    The interaction of atmospheric and soil sulfur on the sulfur and selenium concentration of range plants (1983)
    Springer
    Plant and soil 72 (1983), S. 117-125 
    Details
    ISSN: 1573-5036
    Keywords: Atmosphere ; Selenium ; Sulfur ; Sulfur dioxide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A native northern mixed prairie, Montana, U.S.A., was exposed to three controlled levels of sulfur dioxide and subplots fertilized with sulfur and/or selenium. Plant species that accumulated relatively greater quantities of soil sulfur did not necessarily accumulate relatively greater quantities of atmospheric sulfur, andvisa versa. Plant-sulfur concentrations increased with increasing time and level of exposure, but the rate of increase in plant-sulfur concentrations decreased with increasing SO2 concentration. Plants exposed to the high-SO2 concentration tended to have lower sulfur concentrations when growing in the sulfur-or the selenium-fertilized plots. High soil selenium caused a reduction in plant-sulfur content, but a decrease in plant selenium concentration with high soil sulfur could be detected only when comparing plants on the selenium and sulfur plus selenium plots, where high plant selenium concentrations were encountered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02185101
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  • 16
    Electronic Resource
    Electronic Resource
    The effects of particle configurational entropy on the flocculation of sterically stabilized dispersions (1981)
    Springer
    Colloid & polymer science 259 (1981), S. 1027-1030 
    Details
    ISSN: 1435-1536
    Keywords: Steric configurational ; entropy ; flocculation ; dispersions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Theories are developed that predict the magnitude of the effects of particle configurational entropy on the flocculation behaviour of sterically stabilized dispersions. The free energy associated with the loss of configurational entropy on flocculation is relatively small (less than 10kT for the usual volume fractions studied) but may be responsible for the small dependence of the critical flocculation point on volume fraction of latex reported in some, but not all, experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01558617
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  • 17
    Electronic Resource
    Electronic Resource
    Chlorophyll reduction in western wheatgrass (Agropyron smithii Rydb.) exposed to sulfur dioxide (1981)
    Springer
    Water, air & soil pollution 15 (1981), S. 309-315 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Chlorophyll concentrations in western wheatgrass, an important dominant species in the grasslands of the northern Great Plains of North America, exposed to controlled SO2 concentrations were examined. Concentrations of chlorophylls a and b were significantly decreased, without visible plant necrosis. Chlorophyll-a was more sensitive than chlorophyll-b. Sensitivity of chlorophylls to SO2 changed as the growing season progressed, indicating cumulative effects and interactions with normal senescence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00285044
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  • 18
    Electronic Resource
    Electronic Resource
    Effects of low-level sulfur dioxide exposure on decomposition ofAgropyron smithii litter under laboratory conditions (1983)
    Springer
    Water, air & soil pollution 19 (1983), S. 247-250 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A study of the effects of low-level SO2 exposure on decomposition ofAgropyron smithii was conducted. Finely groundA. smithii litter was exposed to 220 μg m−3 SO2 continuously for five weeks. Respiration and total decomposition were measured. Sulfur dioxide exposure resulted in a 90 % reduction in decomposition rate during the initial phase of exposure and a 17% reduction during the latter phase. Differences in respiration rate were not observed. The reductions in decomposition corresponded to a previous report of reduction in the decomposition ofA. smithii and lowered soil pH with SO2 exposure in a field experiment (Dodd and Lauenroth, 1981).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00599052
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  • 19
    Electronic Resource
    Electronic Resource
    Effects of low-level SO2 fumigation on decomposition of western wheatgrass litter in a mixed-grass prairie (1981)
    Springer
    Water, air & soil pollution 15 (1981), S. 257-261 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Litter bags were used to determine the effects of SO2 and substrate-S content on decomposition rates of western wheatgrass tillers in the field. Atmospheric SO2 decreased monthly decomposition rates 32 to 44% in spring and early summer and 12% in dry late summer. Increased S content of the substrate (980 μg g−1 vs 590 μg g−1 in control) had no measurable effect on decomposition. The observed inhibition was probably caused by reduced pH and/or accumulation of toxic derivatives of SO2 in the microenvironment of organisms on the decaying leaf surfaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00285039
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  • 20
    Electronic Resource
    Electronic Resource
    Response of soil nematodes, rotifers and tardigrades to three levels of season-long sulfur dioxide exposures (1982)
    Springer
    Water, air & soil pollution 17 (1982), S. 343-356 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Soil nematode, rotifer, and tardigrade populations were sampled in field plots of native northern mixed prairie in southeastern Montana from 1977 to 1979. The field plots were exposed to season-long fumigation with controlled low-levels of SO2 throughout the growing seasons (April–October). Two field sites were used, one fumigated for five seasons (1975–1979) and the other for four (1976–1979). Seasonal average SO2 concentrations ranged from control (〈 1 pphm) to approximately 7 pphm. Soil fauna were sampled by taking soil cores and extracting them by the Baermann wet funnel technique. Total counts were made for tardigrades and rotifers while nematodes were divided into three groups-stylet bearers (Tylenchida-Dorylimida), non-stylet bearers, and the predatory Mononchida. Consistent trends of substantial reductions in tardigrade populations occurred in all treated plots in all years; however, statistical significance was achieved only in 1979 when sample size and individual core size were substantially increased. Tardigrades were found to be restricted almost completely to the surface two centimeters of the soil profile. Significant population reductions in the treated plots of both sites were found for non-stylet bearing nematodes in 1977 only. Stylet bearing types and predaceus Mononchida appeared unaffected by the SO2 as were the soil rotifers, although slight but consistent trends of reduction in rotifers occurred in the highest treatments in 1977 and 1978. Both nematodes and rotifers were distributed primarily in the 0 to 10 cm layer of the soil profile but not restricted to the soil surface as much as the tardigrades. Implications of the responses to SO2 and vertical distributions of the three groups are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00460102
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