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  • 1
    Electronic Resource
    Electronic Resource
    Über die magnetische Anisotropie des Eisens, Nickels und Kobalts (1939)
    Springer
    The European physical journal 111 (1939), S. 477-483 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Die Anisotropie der Magnetisierbarkeit des ferromagnetischen Einkristalls wird auf Grund eines neuen und übersichtlichen Modells des ferromagnetischen Stoffes diskutiert. Die nach dieser Theorie berechneten Konstanten der magnetischen Anisotropie stimmen beim Eisen und Nickel mit dem Experiment befriedigenderweise überein. Beim Kobalt bleibt zwischen Theorie und Experiment eine kleine Diskrepanz, die durch Berücksichtigung der Hysteresis bei den Magnetisierungs- und Entmagnetisierungsvorgängen verkleinert werden kann.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01329507
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  • 2
    Electronic Resource
    Electronic Resource
    Entladungen im zweigeschichteten Dielektrikum bei Stoßspannung (1939)
    Springer
    Electrical engineering 33 (1939), S. 458-465 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Zusammenfassung Bei einer Stoßspannung von 0,5¦50 (inμs) wurden die Entladungsvorgängc zwischen Spitzenelektroden im geschichteten Dielektrikum aus Luft und Öl längs einer Photoplatte untersucht, wobei die Gesamtschichtstärke bis 40 mm betrug. Als Vorversuch wurde zunächst die Formgebung der Entladungskanälc im Öl bcobachtet. Hierbei wurde wic in früheren Veröffentlichungen festgestellt, daß die Entladungsfiguren beider Polaritäten im Öl keinen so großen Unterschied zeigen wie in Luft. Ist im geschichteten Dielektrikum die Spitze in Luft positiv, so können wir folgende Vorgänge unterscheiden: 1. Die positive Figur erreicht zuerst die Grenzschicht und bildet darauf eine Schicht positiver Oberflächenladung. 2. Die Ladungsdichte auf der Oberfläche ist um so größer, je dünner die Luftschicht ist. 3. Erreicht die negative Ölfigur die Grenzfläche, so bildet sich an dem Treffpunkt ein leuchtender Fleck, der als Flußpunkt für eine neue negative Figur in der Luft dient. 4. Durch Vorwachsen der negativen Figur in Luft kommt der Überschlag im Luftraum und damit der Spannungszusammenbruch an der gesamten Anordnung zustande. Bei der umgekehrten Polarität ist folgendes zu beachten: 1. Ist die Spitze in Luft negativ, tritt keine wesentliche Ladung auf der Grenzschicht auf. 2. Bei dünner Ölschicht wächst eine positive Figur aus der Grenzschicht in den Luftraum bis zur negativen Figur vor. Dadurch setzt auch hier zunächst der Durchschlag der Luft ein, dem der Durchschlag im Öl folgt. Somit ist dann auch hier die Spannung an der gesamten Anordnung stufenweise zusammengebrochen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01661011
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  • 3
    Electronic Resource
    Electronic Resource
    Metal concentrations in pelagic seabirds from the North Pacific Ocean (1990)
    Springer
    Archives of environmental contamination and toxicology 19 (1990), S. 704-711 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Concentrations of four essential elements (Fe, Mn, Zn, and Cu) and two toxic metals (Cd and Hg) were measured in selected tissues of 19 pelagic seabird species collected in the North Pacific and neighboring waters. Essential metal concentrations were generally highest in the liver and less variable than toxic metals among species and also within each species. Fe concentrations in the muscle were higher in Alcidae than in the other families, whereas the opposite trend was found for Fe and Mn in the liver. Zn concentrations varied among species, depending on the Cd concentrations. On the other hand, toxic metal concentrations were highest in the liver or kidney and varied widely among species, greatly depending on differences in the diet among species. Extraordinarily high Hg concentrations were found in Black-footed Albatrosses,Diomedea nigripes, exceeding 300 μg/g wet weight in some, and seemed to be due to constraints on the elimination of Hg. Also, some geographical differences in Cd and Hg concentrations of the seabirds were observed. The concentrations of Cd and Hg reported here, however, seem to be natural rather than due to environmental pollution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01183988
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  • 4
    Electronic Resource
    Electronic Resource
    A hyman hybrid hybridoma producing a bispecific monoclonal antibody that can target tumor cells for attack by Pseudomonas aeruginosa exotoxin A (1990)
    Springer
    Cytotechnology 4 (1990), S. 59-68 
    Details
    ISSN: 1573-0778
    Keywords: bispecific monoclonal antibody ; human hybrid hybridoma ; immunotoxin ; Pseudomonas aeruginosa exotoxin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract By fusing a human hybridoma producing an IgG2ķ antibody against human A431 epidermoid carcinoma cells with an Epstein-Barr virus-transformed human B lymphocyte producing an IgG2ķ antibody against Pseudomonas aeruginosa exotoxin A, we established a hybrid hybridoma producing a bispecific monoclonal antibody reacting with both A431 cells and the exotoxin. Human IgG was purified from the culture supernatant of the hybrid hybridoma, and the bispecific monoclonal antibody in the IgG preparation was further separated from the two parental antibodies by hydroxyapatite high-performance liquid chromatography. The human bispecific monoclonal antibody thus obtained efficiently targeted the antibody-reative cells, A431, for attack by the exotoxin in vitro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00148811
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  • 5
    Electronic Resource
    Electronic Resource
    Selective decomposition of either enantiomer or aspartic acid irradiated with60Co-γ-rays in the mixed aqueous solution with D- or L-alanine (1990)
    Springer
    Origins of life and evolution of the biospheres 20 (1990), S. 111-119 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Aqueous solutions of various amino acids were irradiated with60Co-γ-rays, and subsequently the remaining amino acids were analyzed using HPLC. The D37 for the 1 mM glycine and alanine solutions were 1.95×104 and 1.48×104 Gy, respectively. However, when the mixed solutions of glycine and alanine (each in 0.5 mM) were irradiated under the identical condition, the D37 for the glycine decomposition increased to 3.56×104 Gy, while that for alanine decreased to 0.65×104 Gy. A similar phenomenon was observed also in the case of the mixed solutions of aspartic acid and alanine. Namely, aspartic acid was protected from the attack of radiation by the presence of alanine in the solutions. The most interesting finding in this combination experiment is that, when D,L-aspartic acid was irradiated in the presence of L-alanine, the radiation-sensitivity of L-aspartic acid decreased selectively and vice versa. Namely, the asymmetric field induced in the solutions by adding D- or L-alanine might affect the radiodecomposition rate of either aspartic acid. Addition of glycine to D,L-aspartic acid did not bring about the asymmetric decomposition. It seems that some interaction between these amino acid molecules resulted in this effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01808271
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of NO2 in air on the electrical conductance of In2O3 films with and without added ZnO prepared by R.F. Sputtering (1990)
    Springer
    Journal of materials science 25 (1990), S. 2632-2636 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The conductance of indium oxide films with and without added zinc oxide consisting of ultrafine particles with a mean particle size of ⩽30 nm, decreased by a factor of about 500 upon changing from air to 10 p.p.m. NO2 in air at 150° C. The dramatic decrease in the conduction caused by NO2 adsorption is mainly attributed to the increase in the activation energy,E, in the Arrhenius relationshipG=G o exp (-E/kT), while the pre-exponential factor,G o , is almost constant. The conductance measured in air and NO2 /air for the films with and without added zinc oxide can be fitted to this relationship in the temperature range below 250° C. The decrease in the carrier concentration is considered as the origin of the decrease in conductance caused by NO2 adsorption. The alternative explanation in terms of an increase in the grain-boundary potential, i.e. the mobility gap, can be ruled out because the depletion layer width is larger than the mean particle size.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00638070
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  • 7
    Electronic Resource
    Electronic Resource
    Post-composition control of hydroxyapatite in an aqueous medium (1990)
    Springer
    Journal of materials science 1 (1990), S. 114-117 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract Composition control of hydroxyapatite by post-treatment in an alkaline solution was examined. Non-stoichiometric material having a Ca/P ratio of 1.60 was treated in distilled water (pH 6.5) and in a concentrated aqueous solution of ammonia (pH 11). The Ca/P ratio of the material increased with the latter treatment and the stoichiometric composition (Ca/P=1.67) was achieved after six treatments. In contrast, essentially no change in composition was found with the former treatment. The treated powder had high thermal stability of nominally a stoichiometric composition. Composition change by incongruent dissolution is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00839078
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  • 8
    Electronic Resource
    Electronic Resource
    Determination of thorium and uranium in hot spring and crater lake waters by neutron activation analysis (1990)
    Springer
    Journal of radioanalytical and nuclear chemistry 139 (1990), S. 65-77 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Determination of Th and U in acidic hot spring and crater lake waters was investigated by neutron activation analysis (NAA). Before neutron irradiation, Th and U were preconcentrated and separated from interfering nuclides such as alkali metals and halogens by coprecipitation with aluminium. Irradiation was carried out in two ways, viz., irradiation with Cd foil wrapping (epithermal NAA) and irradiation without Cd foil wrapping (normal NAA). The final determined values of Th and U were at ppb levels. Higher reliability of the determined values was obtained for Th than for U. It was found that epithermal NAA was more effective for the determination of these two actinides than normal NAA and was more effective for the determination of U than that of Th.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02060453
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  • 9
    Electronic Resource
    Electronic Resource
    Measurements of the long-lived radionuclides in environmental samples by accelerator mass spectrometry (1990)
    Springer
    Journal of radioanalytical and nuclear chemistry 138 (1990), S. 261-270 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We present a brief description of the status of our accelerator mass spectrometry system at the tandem accelerator facility of the University of Tokyo and some examples of measurements in environmental samples which have been recently performed. Fallout10Be activities have been measured, from rain samples collected monthly in Tokyo from 1975 to 1977 and from 1984 to 1986, and compared with those of7Be and137Cs. A preliminary experiment on14C measurement in volcanic gas samples is also reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02039851
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  • 10
    Electronic Resource
    Electronic Resource
    Determination of the lanthanoids in a neutral hot spring water by neutron activation analysis (1990)
    Springer
    Journal of radioanalytical and nuclear chemistry 140 (1990), S. 365-377 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Determination of the lanthanoids in a neutral hot spring water has been studied by menas of neutron activation analysis. The aluminium coprecipitation process, which used aluminium as the collector of the lanthanoids, was incorporated in the preparation of a sample for irradiation. Nine lanthanoids, La, Ce, Nd, Sm, Eu, Tb, Tm, Yb and Lu, were determined at ppt levels with satisfactory precision, indicating the effectiveness of aluminium coprecipitation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02039509
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