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  • 1
    Electronic Resource
    Electronic Resource
    Serum from pregnant women carrying a fetus with neural tube defect is teratogenic for rat embryos in culture (1989)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 96 (1989), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary. Sera from 13 pregnant women carrying a fetus with a neural tube defect, and from 13 control women with normal pregnancies at the same stage of gestation were used in the culture of postimplantation rat embryos. Serum from women with normal pregnancies had no adverse effect on rat embryo growth and development. Serum from 10 of the women with affected fetuses had a deleterious effect on the rat embryos as abnormalities of neural tube closure were observed in 28% of the conceptuses compared to only 1·3% of the embryos cultured in control scrum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1989.tb01573.x
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  • 2
    Electronic Resource
    Electronic Resource
    Resolution of candidal lesions of the dorsal rat tongue by ketoconazole (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 17 (1988), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The purpose of this study was to determine whether the mucosal alterations of the dorsal rat tongue produced by Candida albicans infection were reversible upon treatment with the antifungal drug ketoconazole. Following experimentally-produced infection, 17 rats showed clinical evidence of persistent lesions over a period of 20 weeks. Eight of these animals were then treated with ketoconazole daily for 2 weeks (20 mg/kg/day). Appropriate non-infected controls and ketoconazole-only controls were also maintained. Five weeks after the ketoconazole treatment, all animals were killed and the dorsal tongues evaluated clinically and histologically. Control groups showed no abnormalities. Of the 8 animals in the treated-lesion group, all showed lesional resolution, while only 2 of the 9 animals in the untreated-lesion group showed resolution of their lesions (p=0.002). These findings indicate that the epithelial changes produced by this candidal isolate for this period of time are reversible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.1988.tb01517.x
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  • 3
    Electronic Resource
    Electronic Resource
    Differences in mucosal reaction related to Candida albicans isolates (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 16 (1987), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In order to examine the behavior of Candida albicans in an oral mucosal model, 16 isolates of the organism were collected from a variety of clinical settings and were inoculated weekly, in equal numbers and concentrations, into the mouths of separate groups of 20 female Sprague-Dawley rats. Oral swabs were taken bi-weekly in order to monitor the presence of the yeast. After 16 weeks, the animals were killed and the tongues were examined grossly and histologically. Six isolates demonstrated the ability to produce characteristic dorsal tongue lesions to varying degrees (1/20; 1/20; 1/20; 2/20; 3/20; and 12/20). Of the remaining 10 isolates, 5 showed hyphal penetration of the keratin layer of the dorsal tongue epithelium, yet no mucosal reaction was elicited and no lesion was produced (1/19; 2/19; 4/20; 5/20 and 5/20). These findings support the concept that C. albicans exhibits a spectrum of mucosal pathogenicity for dorsal rat tongue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.1987.tb00693.x
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  • 4
    Electronic Resource
    Electronic Resource
    Chromium-titanium-antimony oxide composite anodes: Electro-organic oxidations (1987)
    Springer
    Journal of applied electrochemistry 17 (1987), S. 914-924 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract An activated titanium electrode with an oxide layer, composed of a mixture of Cr2O3, TiO2 and Sb2O3 (optimal mole ratio chromium:titanium:antimony about 2∶1∶1) has been fabricated by thermal decomposition of the chlorides on a titanium substrate at 650°C. The black-green layer adheres well and has a thickness in the order of micrometres. Its structure is explained using a pore model, based on SEM, AES and electrochemical results. Service life time of electrodes in 1 M H2SO4 for oxidation of isopropanol in terms of the turn over factor of Cr2O3 is between 100 and 400. Preparative electro-organic oxidation of isopropanol, tetrahydrofuran and ethylbenzene have been performed with current densities of 0.5 to 5 mA cm−2. The current efficiencies for the main products, acetone, γ-butyrolactone and acetophenone are 100, 53 and 20%, respectively. These results parallel those of the homogeneous oxidation with chromic acid in solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01024357
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  • 5
    Electronic Resource
    Electronic Resource
    Positive polyacetylene electrodes in aqueous electrolytes (1985)
    Springer
    Journal of applied electrochemistry 15 (1985), S. 159-166 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Polyacetylene films, contacted with platinum mesh, have been polarized anodically in aqueous H2SO4, HClO4, HBF4 and H2F2 of medium concentrations (30–70 wt%). Two oxidation peaks are observed, the equivalents of which are 1 $${\text{(1) 0}}{\text{.045 F mol}}^{ - {\text{1}}} {\text{ CH (2) 0}}{\text{.23 F mol}}^{ - {\text{1}}} {\text{ CH}}$$ The potential of the Process 1 decreases linearly with increasing acid concentration by 20–40 mV mol−1 dm−3, while the potential of Peak 2 exhibits normal Nernst behaviour (about + 60 mV decade−1. Process 1 is partially reversible, while Process 2 is totally irreversible. From these findings for Process 1 we conclude the reversible insertion of anions into the polyacetylene host lattice, which is primarily oxidized to the polyradical cation, with the co-insertion of acid molecules HA to yield the insertion compound [(CH)+·yA−·vyHA] x y⩽4.5% andv=1.5 for H2SO4 and HClO4. In the course of Process 2, the polymer is irreversibly oxidized according to $$( - ^ \cdot {\text{CH}} \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot ^ \oplus {\text{ CH}} - )_{x/2} + 2{\text{H}}_{\text{2}} {\text{O}} \to ( - \mathop {\text{C}}\limits_{\mathop \parallel \limits_{\text{O}} } \cdot \cdot \cdot \cdot \cdot \cdot \cdot \cdot \mathop {\text{C}}\limits_{\mathop \parallel \limits_{\text{O}} } - )_{x/2} + 6{\text{H}}^{\text{ + }} + 5e^ - $$ As this process occurs to some extent even in the potential region of Process 1, a continuous degradation of the host lattice occurs upon cycling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00620929
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  • 6
    Electronic Resource
    Electronic Resource
    Electrocoating of iron and other metals with polypyrrole (1989)
    Springer
    Journal of applied electrochemistry 19 (1989), S. 401-409 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Galvanostatic electrodeposition of polypyrrole from more than 20 nonaqueous and aqueous electrolytes containing anions such as BF 4 − , ClO 4 − , HSO 4 − , Tos−, HCO 3 − , H2PO 4 − , HPO 4 2− , H2BO 3 − and NO 3 − at the substrates Pt, Au, Cu, Ti, stainless steel/V2A and Fe was investigated. The passivating substrates Pt, Au, Ti and V2A could be electrocoated under a broad variety of conditions. Cu dissolved anodically. The same was true for Fe with only one important exception, namely aqueous nitrate. Smooth, well-adhering polypyrrole layers were obtained on iron at NO 3 − concentrations of 0.01–1 M and at current densities of 0.5–10 mA cm−2. The degree of insertion for nitrate ions was abouty=0.25, confirmed by elemental analysis. Current efficiencies with regard to thisy were about 90%. The layers were stable in air for a long time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01015243
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Behandlung des Grundzustands leichter Kerne (1959)
    Springer
    The European physical journal 156 (1959), S. 555-560 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A treatment for obtaining the ground state energy of nuclei, interacting via short range singular two body interactions is proposed which combines a variational procedure with the two particle correlations, obtained from solutions of the Bethe-Goldstone equation. Although no numerical results have been obtained so far it is hoped that the combination will have some advantage over the usualt-matrix treatment. The lowest order correction to thet-matrix energy, if self-consistency is not strictly fulfilled (as it is always the case in practical calculations) and arising from centre of mass effects is given. Numerical calculations will be difficult except for the lightest nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01461248
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  • 8
    Electronic Resource
    Electronic Resource
    Die Allgemeingültigkeit des Trägheitsgesetzes der Energie in der Planckschen Fassung (1953)
    Springer
    The European physical journal 134 (1953), S. 136-155 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung In einer kürzlich erschienenen Arbeit [13] konnte M. v.Laue nachweisen, daß derMinkowskische Ansatz für den Energie-Impuls-Tensor der Elektrodynamik bewegter Körper der einzig mögliche ist. Dieser Welttensor ist unsymmetrisch und widerspricht daher derPlanckschen Fassung des Gesetzes der Energieträgheit. Hier soll gezeigt werden, daß nach den Symmetrieeigenschaften des elektrodynamischen Tensors allein nicht über jenes Gesetz entschieden werden kann, sondern der aus der Wechselwirkung zwischen Feld und Materie herrührende Welttensor mit in Betracht gezogen werden muß. Für ungeladene Nichtleiter wird der Materietensor explizit berechnet, und die daraus sich ergebenden Folgerungen werden diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01329407
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  • 9
    Electronic Resource
    Electronic Resource
    Der Energie-Impulstensor in der phänomenologischen Theorie der Supraleitung (1953)
    Springer
    The European physical journal 134 (1953), S. 334-345 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung In einer vorangegangenen Arbeit [1] wurde gezeigt, daß die notwendig sich ergebende Unsymmetrie des elektrodynamischen Welttensors bewegter Körper [2] nicht gegen die Allgemeingültigkeit des Energieträgheitsgesetzes in derPlanckschen Form verstößt. Eine im Anschluß daran durchgeführte Untersuchung des unsymmetrischenSchubertschen Ansatzes [3] für den Welttensor der Supraströmung ergab, daß dieser, von der skalar linearen Form der Theorie ausgehende Ansatz nicht der einzig mögliche ist und in gewisser Hinsicht zu unplausiblen Folgerungen führt (s. die Einleitung zu dieser Arbeit). Diese Arbeit will zeigen, wie sich dieLondon-v. Laueschen elektrodynamischen Grundgleichungen und der Energie-Impulstensor in einer den Zusammenhang zwischen den beiden Feldvektoren $$\mathfrak{F}^l $$ und $$\mathfrak{G}$$ offen lassenden, nichtlinearen TheorieLorentz-invariant formulieren lassen. Ein dadurch in der erstenLondonschen Gleichung sich ergebender Zusatz ist klein von relativistischer Größenordnung, während Unsymmetrie des Welttensors nur noch im nichtskalaren Fall auftritt, was wegen des Impulssatzes, der in diesem Fall Drehmomente auf die Materie liefert ([4], §13 h), auch berechtigt ist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01330159
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  • 10
    Electronic Resource
    Electronic Resource
    Tensor correlations and spin-isospin excitations (1985)
    Springer
    The European physical journal 321 (1985), S. 329-334 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study the effects of ground state tensor correlations with a phenomenological two body correlation function on the spin-isospin modes of excitations in nuclei. The correlation function is of Jastrow type with a tensor term. The energy weighted strength is drastically enhanced because of these correlations. We predict considerable amount of strength in the region of 60–70 MeV excitations if the sum is evaluated in a two-state model. Our results are also sensitively dependent on the strength of the tensor term in the phenomenological Jastrow function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01493454
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