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  • 1
    Electronic Resource
    Electronic Resource
    Bemerkungen zur Eignung der Schweinehaut als biologisches Modell für die Haut des Menschen (1996)
    Springer
    Der Hautarzt 47 (1996), S. 178-182 
    Details
    ISSN: 1432-1173
    Keywords: Schlüsselwörter Schweinehaut ; Biologisches Hautmodell ; Vergleichbarkeit Mensch ; Dermatologische Grundlagenforschung ; Key words Porcine skin ; Biomedical skin model ; Comparison with humans ; Experimental dermatological research
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The use of porcine skin as a biomedical model for the human integument is discussed with reference to the literature. The epidermis and dermis can be used as a model as there are clear structural, functional and biochemical similarities with human skin layers. The actual utilization of porcine skin in dermatological research is reviewed. Practical difficulties are emphasized: in particular, the conditions required for use of porcine skin in experimental research, the most suitable breeds, and restrictions on biological interpretation of the results.
    Notes: Zusammenfassung Auf der Basis einer Literaturanalyse wird diskutiert, in welchem Rahmen sich das Integument des Hausschweins als biologisches Modell für die Haut des Menschen eignet. Unter Berücksichtigung domestikationsbedingter Veränderungen ist ersichtlich, daß nur Epidermis und Dermis aufgrund deutlicher struktureller, funktioneller und biochemischer Gemeinsamkeiten mit dem Menschen für den vorgenannten Zweck dienen können. Eine zusammenfassende Wertung der Verwendung von Schweinehaut in der aktuellen dermatologischen Forschung unterstreicht diese Problematik. Abschließend wird nachdrücklich darauf verwiesen, welche Schwierigkeiten sich aus praktischer Sicht ergeben, im besonderen, welche Vorbedingungen für eine relevante Nutzung der Haut des Schweines für Versuchszwecke erfüllt sein sollten, welche Rassegruppe sich anbietet und welche einschränkenden Faktoren für eine biologische Interpretation der erhaltenen Ergebnisse bestehen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001050050399
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  • 2
    Electronic Resource
    Electronic Resource
    Elastic fibre arrangement in the skin of the pig (1981)
    Springer
    Archives of dermatological research 270 (1981), S. 391-401 
    Details
    ISSN: 1432-069X
    Keywords: Pig ; Dermis ; Elastic fibres ; SEM ; Schwein ; Dermis ; elastische Fasern ; SEM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Nachdem durch Autoclavierung kollagene Fasern und Grundsubstanz entfernt worden waren, konnte in Hautproben mit Hilfe der SEM-Technik ein dichtes Netzwerk von elastischen Fasern in der Dermis des Schweines nachgewiesen werden. Das Hautmaterial stammte vom Wildschwein, vom Hausschwein sowie vom Miniaturschwein. Im Vergleich mit Rücken und Flanke zeigte die Bauchregion den relativ größten Anteil an elastischen Fasern. Dickere elastische Fasern fanden sich vorwiegend in der tieferen Dermis, während dünnere Fasern mehr im Stratum papillare und in der mittleren Dermis anzutreffen waren. Dünne Fasern waren besonders in Anheftung an die Unterseite der Epidermis und die Außenseite der Haarfollikel zu beobachten. Die Ergebnisse werden im Zusammenhang mit Beobachtungen aus entsprechenden Untersuchungen an der Dermis des Menschen diskutiert.
    Notes: Summary After the removal of collagen and ground substance by autoclaving tissue samples and subsequently applying the SEM technique, a dense meshwork of elastic fibres could be demonstrated in the dermis of the pig (wild boar, domestic pig, miniature pig). The abdominal body region showed relatively large amounts of elastic fibres compared to the back and the lateral body wall. In comparison with the papillary layer and the mid-dermis, thicker elastic fibres predominated in the deeper dermis; thinner fibres were attaching to the epidermis and the pilosebaceous units. The results are discussed in relation to corresponding investigations on the human dermis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00403783
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  • 3
    Electronic Resource
    Electronic Resource
    A variational method for the calculation of vibrational energy levels of triatomic molecules using a Hamiltonian in hyperspherical coordinates (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 8902-8914 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A full variational procedure is presented which is particularly suited to the calculation of vibrational (J=0) energy levels of triatomic potentials with large amplitude motions and also allows for high permutational symmetries. Starting from simple basis functions reflecting the structure of the kinetic energy operator, an optimized basis set is derived by a step-wise contraction scheme. The method is applied to H+3 and Na+3 (D3h) and to model potentials for H2O+ (C2v) and HLiH− (D∞h). The results for H+3 are shown to be superior to all previous calculations, in particular for those energy levels that lie above 20 000 cm−1. A new ab initio potential is presented for Na+3, for which converged energy levels are calculated up to 3500 cm−1. For H2O+ and HLiH−, the calculated energy levels agree with those obtained from a variational procedure in internal valence coordinates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.459229
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  • 4
    Electronic Resource
    Electronic Resource
    Dipoles induced by the interactions of HD with He, Ar, H2, or HD (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 4855-4860 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The collision induced dipole components of molecular HD–X pairs (X=He, Ar, H2, or HD) are obtained with a numerical precision in the range of a few percent from previous ab initio calculations of the induced dipole components of H2–X pairs, using a coordinate transformation that accounts for the fact that in the HD molecule, the center of mass, and the center of electronic charge do not coincide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454696
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  • 5
    Electronic Resource
    Electronic Resource
    Dipole-allowed excited states of N2: Potential energy curves, vibrational analysis, and absorption intensities (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 115 (2001), S. 6438-6449 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The three lowest adiabatic potential energy curves for each of the two dipole-allowed symmetries, 1Σu+ and 1Πu, are calculated in the multireference configuration–interaction framework. Diabatic potentials and corresponding coupling elements are obtained by diagonalizing the electronic operator r2 which serves to discriminate Rydberg and valence type states. A large basis set and judiciously chosen active orbital and configuration spaces furnish smooth and reliable potential curves. However, a vibrational analysis of the coupled systems in diabatic representation still shows some disappointing deviations from the experimental interference patterns of overlapping absorption bands that are highly sensitive to potential energy differences. Starting from the calculated curves, a fitting procedure accounting also for empirical information yields potential energy curves and diabatic coupling elements that reproduce all details of the experiment very well. These recommended results also serve to identify residual defects in the ab initio curves mainly as vertical shifts. The performance of other commonly used ab initio methods for the calculation of excited states is briefly discussed. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1400139
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  • 6
    Electronic Resource
    Electronic Resource
    A variational method for the calculation of rovibrational energy levels of triatomic molecules using a Hamiltonian in hyperspherical coordinates: Applications to H+3 and Na+3 (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 100 (1994), S. 2104-2117 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A full variational procedure is presented for the calculation of rovibrational (J(approximately-greater-than)0) energy levels which is particularly suited for triatomic potentials that support large amplitude motions and that may be of high permutational symmetry. It is based on a kinetic energy operator expressed in hyperspherical coordinates (ρ,aitch-theta,Φ). Particular attention is paid to the singularities of this operator in the derivation of the primitive basis functions, which should exactly cancel all singularities, and in their subsequent contractions. The method is applied to the D3h molecules H+3 and Na+3, for which converged rovibrational energies are calculated for J=0, 1, 2 to 25 000 cm−1 for H+3 and to 1250 cm−1 for Na+3, respectively. A spectral analysis of these energy levels is undertaken. For the lowest ten vibrational levels of H+3, converged rovibrational energies up to J=10 are also calculated. These energies, which extend previous calculations, should prove useful in the interpretation of the observed spectra. Our J=1 results for H+3 compare well with recently published values. The results for Na+3 constitute new data which supplement our previous J=0 calculations. It is shown that the spectrum of this molecule can be expressed very well by an appropriate effective Hamiltonian, quite in contrast to H+3. In order to verify that the method is general, J(approximately-greater-than)0 calculations are performed for model potentials of H2O+ (C2v) and HLiH− (D∞h). The results are in full agreement with those from a proven variational method in valence coordinates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.466507
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  • 7
    Electronic Resource
    Electronic Resource
    Dynamic multipole polarizabilities, reduced spectra, and interaction coefficients for N2 and CO (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 111 (1999), S. 9618-9624 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Reliable ab initio reduced spectra that serve to calculate dynamic polarizabilities as well as long-range interaction coefficients are presented. The reduced spectra are constructed from perturbed functions that are computed in the single excitation multi-reference averaged coupled pair approach. The static dipole polarizabilities are of the same quality as values obtained in a recent study using elaborated coupled cluster expansions. The dynamic dipole polarizabilities are in excellent agreement with all experimental data available. The higher multipole polarizabilities (l≤3) are also expected to be the most reliable ones up to date. The interaction coefficients for the N2–N2 interaction perfectly match the coefficients obtained from semiempirical anisotropic oscillator strength distributions. For the CO–CO interaction, however, the same quantities differ by up to 10%. We believe our coefficients to be accurate to 3%. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.480336
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  • 8
    Electronic Resource
    Electronic Resource
    Static dipole polarizabilities of Li2, Na2, and K2 (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 953-957 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Static dipole polarizability functions (α(parallel) and α⊥) and thermally averaged isotropic polarizabilities (α) of Li2, Na2, and K2 in their electronic ground states have been obtained from all-electron SCF+valence CI calculations which include core polarization effects by use of an effective potential. As a function of internuclear separation, α⊥ shows a monotonic increase in all three cases while α(parallel) exhibits a pronounced maximum at about 1.5 Re. For T=300 K, we find α(Li2)=214, α(Na2)=262, and α(K2)=477 a.u. Our results, to which we attribute an uncertainty of 2%, support the measured value for the average polarizability of Li2 [R. W. Molof et al., J. Chem. Phys. 61, 1816 (1974)] but disagree with their results for Na2 and K2. For these dimers, Molof 's mean experimental values appear to be in error by 33% and 18%, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451251
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  • 9
    Electronic Resource
    Electronic Resource
    The development of catecholamines in embryos and larvae of the rainbow trout (Salmo gairdneri Rich.) (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 10 (1977), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Catecholamines are present in the late embryonal and early larval developmental stages (alevin) of the rainbow trout. Changes in the alevin behaviour can be related to the catecholamine concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1977.tb04074.x
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  • 10
    Electronic Resource
    Electronic Resource
    Static dipole polarizabilities of N2, O2, F2, and H2O (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 1282-1288 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Standard ab initio methods are used to determine static dipole polarizabilities as the static limit of perturbational and derivative methods to calculate dynamic polarizabilities. The performance of multireference configuration-interaction wavefunctions in the perturbational procedure is found to be very promising for its application in dynamic polarizabilties calculations. Results of the perturbational and derivative approach based on wavefunctions of different structure are compared and improved dipole polarizabilities are obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.467820
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