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  • 1
    Electronic Resource
    Electronic Resource
    Influence of pH on nickel electrodeposition at low nickel(II) concentrations (1995)
    Springer
    Journal of applied electrochemistry 25 (1995), S. 770-775 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The effect of pH on the nucleation stages of nickel electrodeposition on vitreous carbon has been analysed using low nickel concentrations, without additives. The experimental results indicated that there was a change in the electrochemical response of the system at 4 〈 pH 〈 4.5. A predischarge adsorption ascribed to nickel(II) species was observed with a different surface coverage depending on the pH. Moreover, different inhibition and 3D nucleation processes were detected in varying experimental conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00648632
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  • 2
    Electronic Resource
    Electronic Resource
    Properties of Zn-Ni alloy deposits from ammonium baths (1994)
    Springer
    Journal of applied electrochemistry 24 (1994), S. 1249-1255 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Zinc-nickel alloys have been electrodeposited from a simple bath containing only zinc, nickel and ammonium chlorides. The composition, morphology, structure and corrosion resistance of the alloys obtained with this bath have been studied and the influence of some additives, normally used to reduce the stress of the deposits, has also been analysed. Among these additives it has been found that the aromatic sulfonimide does not significantly modify the deposit characteristics but improves the corrosion resistance of the alloys. Moreover, the applicability of two statistical methods to a deposition process has been tested, to obtain the main factor determining the deposit composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00249889
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  • 3
    Electronic Resource
    Electronic Resource
    Electrochemical nucleation of nickel on vitreous carbon electrodes: the influence of organic additives (1991)
    Springer
    Journal of applied electrochemistry 21 (1991), S. 709-715 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The initial stages of the electrodeposition of nickel onto vitreous carbon from ethanol/water chloride solutions was studied in the presence and absence of some organic compounds. The influence of both additives and metal concentration was investigated by cyclic voltammetry, potential step experiments and differential capacity measurements. The role of the additives in the deposition process related to their adsorption, both on vitreous carbon and on vitreous carbon/nickel deposited electrodes, is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01034050
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  • 4
    Electronic Resource
    Electronic Resource
    Electrodeposition of zinc-nickel alloy coatings: influence of a phenolic derivative (1990)
    Springer
    Journal of applied electrochemistry 20 (1990), S. 635-639 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The electroplating of Zn−Ni alloy films from a chloride bath has been studied under different plating conditions, both in the absence and presence of a phenolic derivative. Under the conditions examined, the electrodeposition of the alloys belonged to the anomalous type. The morphology and composition of the deposits varied with current density, temperature, bath composition and additive concentration. The results show that the additive modifies the structure and surface topography of the deposits to a large extent and produces smoother deposits. The corrosion resistance of the alloys has been analyzed by means of salt-spray tests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01008875
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  • 5
    Electronic Resource
    Electronic Resource
    Zinc-nickel coatings: Relationship between additives and deposit properties (1991)
    Springer
    Journal of applied electrochemistry 21 (1991), S. 44-49 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The electroplating of zinc-nickel alloys from a chloride bath containing two brighteners (a phenolic derivative and an unsaturated aromatic compound) and a levelling agent (an aromatic carboxylate) has been studied under different plating conditions. The composition and morphology of the alloys depended on the concentration of all the additives and also on the temperature. As a general effect, these additives smooth the deposit and refine the grain size. By means of scanning electron microscopy, it was possible to classify the deposit morphologies according to the type and concentration of the additives. The resistance of the alloys to corrosion was studied by means of a neutral salt-spray test.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01103828
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  • 6
    Electronic Resource
    Electronic Resource
    Characterization of zinc–nickel alloys obtained from an industrial chloride bath (1998)
    Springer
    Journal of applied electrochemistry 28 (1998), S. 1113-1120 
    Details
    ISSN: 1572-8838
    Keywords: zinc–nickel electrocoatings ; characterization ; electrochemical corrosion ; residual stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Zinc–nickel electrocoatings obtained from an industrial bath containing two additives were characterized by analysing their morphology, structure, microhardness, residual stress and corrosion resistance. Changes in deposit characteristics following the addition of saccharin were also studied. All coating, with or without saccharin, presented a good appearance, good mechanical properties and a high corrosion resistance. Moreover, by varying certain plating conditions it was observed that the deposits maintained their properties over a wide interval of experimental conditions, which suggests their suitability for use in batch bath.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003461109203
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of Aphid Predators on Oviposition Behavior of Aphid Parasitoids (1998)
    Springer
    Journal of insect behavior 11 (1998), S. 297-302 
    Details
    ISSN: 1572-8889
    Keywords: aphid ; parasitoid ; Aphidius ervi ; Coccinellidae ; oviposition behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021056226037
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  • 8
    Electronic Resource
    Electronic Resource
    Zum Einfluß mechanischer Beanspruchungen auf die Supraleitungseigenschaften dünner Nb3Sn-Oberflächenschichten (1962)
    Springer
    The European physical journal 170 (1962), S. 154-161 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Niobdrähte mit Nb3Sn-Oberflächenschicht werden auf Zug und Torsion, Niobbänder mit Nb3Sn-Überzug durch Biegung und uniaxialen Druck beansprucht und in diesem Zustand auf ihre Supraleitungseigenschaften untersucht. In jedem Fall wird die Sprungtemperatur der Nb3Sn-Schicht durch die mechanische Beanspruchung erniedrigt. Das Verhalten im einzelnen hängt von den Herstellungsbedin-gungen der Nb3Sn-Schicht ab. Im Fall von Zug und Torsion wird ein annähernd parabolischer Zusammenhang zwischen Sprungpunktserniedrigung und mechanischer Beanspruchung gefunden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01379526
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  • 9
    Electronic Resource
    Electronic Resource
    Präparation und Supraleitungseigenschaften von Zweikomponenten-Diffusionsschichten auf Niob und Vanadium (1964)
    Springer
    The European physical journal 179 (1964), S. 111-115 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Kurven kritischer Stromstärken von Zweikomponenten-Diffusionsschichten auf Niob mit Zinn als einer Komponenten in transversalen Magnetfeldern bis 90 kOe werden mitgeteilt. Im Gebiet hoher Feldstärken liegen die Kurven kritischer Stromstärken von Zweikomponenten-Diffusionsschichten mit verschiedenen Elementen (Al, In, Pb und Bi) als zweiter Komponente unterhalb der Kurven reiner Nb-Sn-Diffusionsschichten entsprechender Präparationsbedingungen, verlaufen jedoch unter sich und mit den Kurven reiner Nb-Sn-Schichten bei halblogarithmischer Darstellung ungefähr parallel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01381249
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  • 10
    Electronic Resource
    Electronic Resource
    Perforin and its role in T lymphocyte-mediated cytolysis (1992)
    Springer
    Cellular and molecular life sciences 48 (1992), S. 911-920 
    Details
    ISSN: 1420-9071
    Keywords: Cytotoxic T lymphocytes ; granules ; perforin ; gene targetting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The killing mediated by cytotoxic T lymphocytes (CTL) represents an important mechanism in the immune defence against tumors and virus infections. The lytic mechanism has been proposed to consist of a polarized secretion of granule-stored molecules, occurring on effector-target cell contact. By electron microscopy, membrane deposited, pore-like lesions are detected on the target cell membrane during cytolysis by CTL. These structures resembled strikingly pores formed during complement attack. Granules of CTL isolated by nitrogen cavitation and Percoll gradient centrifugation were shown to retain cytotoxic activity. Further purification of proteins stored in these granules led to the discovery of a membranolytic protein named perforin which was capable of polymerizing into pore-like structures. In addition to this cytolytic protein, a set of serine esterases was found as well as lysosomal enzymes and proteoglycans, whose function are not yet clearly defined. The role of perforin in the cytotoxic process is currently being explored by ablating the active gene in mice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01919138
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