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  • 1
    Electronic Resource
    Electronic Resource
    Automerization of C11H11 chlorides and stability of their cations (1981)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 103 (1981), S. 6530-6532 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00411a059
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  • 2
    Electronic Resource
    Electronic Resource
    Additions and Corrections - The Automerization of C11H11 Chlorides and the Stability of Their Cations (1982)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 104 (1982), S. 2677-2677 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00373a602
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The involvement of gonadotrophin and sex steroids in the control of reproduction in the parr and adults of Atlantic salmon, Salmo salar L. (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 18 (1981), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Early sexual maturity occurred in the majority of male Atlantic salmon parr. Levels of the plasma androgens testosterone and 11-ketotestosterone rose steadily as the male parr matured, and decreased as the testes regressed. No such progressive changes were observed in the plasma gonadotrophin (GTH) levels, although the pituitary GTH levels were much higher in mature than in immature male parr; reasons for this, incluiding the possibility that the GTH radioimmunoassay employed is inadequate, are discussed. All female parr remained immature throughout the year, although the gonadosomatic index did show an annual cycle. Adult salmon had higher GTH and sex steroid levels than parr at the same stage of sexual maturity, the levels corresponding to the degree of sexual development of the adult fish.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1981.tb03760.x
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  • 4
    Electronic Resource
    Electronic Resource
    Effects of ovariectomy of the dogfish Scyliorhinus canicula L. on circulating levels of androgen and oestradiol and on pituitary gonadotrophin content (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 21 (1982), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Levels of androgens and oestradiol in dogfish, Scyliorhinus canicula, plasma, measured by radioimmunoassay, decrease markedly after ovariectomy (OVX). The magnitude and latency of these responses varies according to length of captivity preceding the operation and the time of year at which ovariectomy is performed. Androgens are cleared more rapidly than oestradiol from plasma following OVX, and levels of both steroids are reduced after laparotomy (LAP) in November but not in March. An extract of ventral lobes of the dogfish pituitary induces a significant increase in the circulating androgen levels in LAP fish but not in OVX fish, indicating that the ovary is the major site of androgen production in response to stimulation by dogfish gonadotrophin. Intramuscular injections of oestradiol benzoate (2.5 mg per fish) into LAP fish produce a significant reduction in the gonadotrophin content of the pituitary ventral lobe, measured in the quail testicular cell bioassay, when compared to LAP and unoperated controls. However, no significant changes in the gonadotrophin content of the ventral lobe were seen five days after OVX in June.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1982.tb02834.x
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  • 5
    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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  • 6
    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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  • 7
    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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  • 8
    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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  • 9
    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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  • 10
    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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