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  • 11
    Electronic Resource
    Electronic Resource
    Quantitative immunohistochemistry of metallothionein in rat placenta (1989)
    Springer
    Histochemistry and cell biology 90 (1989), S. 365-369 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The presence of metallothionein (MT) was demonstrated in placentae from cadmium-exposed and control rats by an immunohistochemical technique, using peroxidase as label and the diaminobenzidine procedure for the staining reaction. The protein was found in different regions of the placenta, i.e. in trophoblastic labyrinth, in spongiotrophoblast and in visceral yolk sac. Cytophotometric analysis of the final reaction product revealed that the amount of MT was increased in the placental labyrinth of cadmium-exposed rats. Increases were found in both nuclei and cytoplasm of trophoblast cells in the labyrinth region. Possible roles of MT in the transport of zinc and in the carbohydrate metabolism are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00508314
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    Paper (German National Licenses)
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  • 12
    Electronic Resource
    Electronic Resource
    Melting of horizontal ice layer from above by combined effect of temperature and concentration of aqua-solvent (1987)
    Springer
    Heat and mass transfer 21 (1987), S. 227-232 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Der Aufsatz behandelt das Aufschmelzen einer horizontalen Eisschicht von oben mittels einer wäßrigen Lösung niedrigen Gefrierpunktes. Die in diesem Experiment verwendeten Lösungen sind Natriumchlorid NaCl, Kalziumchlorid CaCl2, Magnesiumchlorid MgCl2 und Harnsäure CO(NH2)2. Die Oberfläche der wäßrigen Lösung und der Schmelze wurde mit einer Infrarotlampe beheizt, deren Temperatur bei 8–40
    Notes: Abstract This paper is concerned with the melting of horizontal ice layer from above by aqua-solvent with low solidification point. The solute used in this experiment are Sodium chloride NaCl, Calcium chloride CaCl2, Magnesium chloride MgCl2, and Urea CO(NH2)2- The upper surface of aqua-solvent melt layer is heated by an infrared lamp, whose temperature is in the range of about 8
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01004025
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  • 13
    Electronic Resource
    Electronic Resource
    Role of the bivalveCorbicula japonica in the nitrogen cycle in a mesohaline lagoon (1988)
    Springer
    Marine biology 99 (1988), S. 369-374 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of the bivalveCorbicula japonica on the nitrogen cycle in Lake Shinji, a mesohaline brackish lagoon in Japan, was examined quantitatively based on field surveys and laboratory experiments carried out in the summer of 1982 and 1983. The biomass of the flesh ofC. japonica comprised 97% of the total biomass of the macrozoobenthos in summer. Total biomass ofC. japonica in the lake was estimated 30 986 t fresh wt. The concentration of suspended solids immediately above the lake bottom, whereC. japonica filters the water, was 1.5 to 4 times higher than that in the surface water. In laboratory experiments, the filtration rate was 5.0 litres g dry flesh wt-1 h-1, the excretion rates of ammonia and of feces and pseudofeces ofC. japonica were 200×10-6 g N g dry flesh wt-1 h-1 and 33.4 mg dry wt g dry flesh wt-1 h-1, respectively at 27°C, the average summer water temperature in the lake. From our study, we estimated thatC. japonica filters almost the same amounts of particulate organic nitrogen produced in the lake by phytoplankton and that supplied from rivers, and that it excretes 30% of filtered nitrogen as feces or pseudofeces and 18% as ammonia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02112129
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  • 14
    Electronic Resource
    Electronic Resource
    Phase structure of polyetherpolyol-4,4′-diphenylmethane diisocyanate-based reaction injection molded (RIM) polyurethanesThis paper was presented in part at the annual meeting of the Society of Polymer Science in Japan in 1981 (1986)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 26 (1986), S. 585-592 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A series of polyetherpolyol-4,4/-diphenylmethane diisocyanate based polyurethanes were prepared by reaction injection molding (RIM). The degree of phase separation and morphology, which govern the mechanical properties, was investigated by X-ray scattering, dynamic mechanical spectroscopy, and electron microscopy. The phase reversion occurred at just a 70 weight percent concentration of the based reagent. The degree of phase separation increased with the molecular weight of polypropyleneglycol and decreased with the ethyleneoxide capping content. Morphology was influenced by injection rates.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760260902
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