Bibliothek

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Artikel: DFG Deutsche Nationallizenzen  (18)
  • 1985-1989  (18)
  • 1987  (18)
Datenquelle
  • Artikel: DFG Deutsche Nationallizenzen  (18)
Materialart
Erscheinungszeitraum
  • 1985-1989  (18)
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Magnetic behavior of the Co2−xZnxTiO4 and Co2SnO4 systems (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 3622-3624 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Our ac susceptibility (χ) measurements, carried out between 1.7 and 100 K, show five χ peaks, signaling five transition temperatures, in the disordered frustrated spinel ferrite Co2TiO4. This result, in conjunction with the replica symmetric mean field theory of vector spin glasses and earlier magnetization and neutron diffraction studies, indicates a separate freezing of A- and B-site spins. To our knowledge, such a phenomenon has not been observed before. Co2SnO4 and Co1.2Zn0.8TiO4 χ measurements, where three and one χ peaks are respectively observed, support this picture.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.338692
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    A study on the non-linear flow of blood through arteries (1987)
    Springer
    Bulletin of mathematical biology 49 (1987), S. 257-277 
    Details
    ISSN: 1522-9602
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Mathematik
    Notizen: Abstract The pulsatile flow of blood through arteries is investigated in this paper by treating the blood vessel as a thin-walled anisotropic, non-linearly viscoelastic, incompressible circular cylindrical shell; nonlinearities of the flow of blood are also paid due consideration. The displacement components of the vessel wall are obtained from the equations of equilibrium which have been linearized by employing the principle of superimposition of a small deformation on a state of known finite deformation. The influence of the wall deformation on the flow properties of blood, has been accounted for by considering suitably formulated continuity conditions. A finitedifference scheme is employed for solving the flow equations together with the boundary and initial conditions by using the locally measured values of pressure and pressure gradient. Numerical results obtained for the velocity profile of blood flowing in a canine middle descending thoracic aorta have been presented through figures.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02460119
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Oxygen electroreduction in perfluorinated sulphonyl imides (1987)
    Springer
    Journal of applied electrochemistry 17 (1987), S. 1057-1064 
    Details
    ISSN: 1572-8838
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: Abstract The electroreduction of oxygen in perfluorinated sulphonyl imides has been studied with the emphasis on the identification of alternate acid electrolytes which could replace the presently used phosphoric acid as an electrolyte in H2−O2 fuel cells. The activity for oxygen reduction on smooth platinum and gas-fed, high surface area platinum-catalysed electrodes (10% platinum loading on XC-72 carbon support) has been examined. The polarization of the air cathode in the micro-fuel cell in bis(trifluoromethanesulphonyl)imide is 40 mV more positive compared to phosphoric acid at 100 mA cm−2, presumably due to the increased solubility of oxygen and lower tendency of bis(trifluoromethanesulphonyl)imide to adsorb on the platinum catalyst. The related bis(fluorosulphonyl)imide is unstable in water and the hydrolysis products adsorb strongly on the catalytic sites, resulting in poor performance.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01024371
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Abrogation of the tumor promoting effect of allogeneic blood transfusion by polyadenylic-polyuridylic acid (poly A-poly U) (1987)
    Springer
    Cancer immunology immunotherapy 25 (1987), S. 242-244 
    Details
    ISSN: 1432-0851
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Studies from several centers have shown an immunosuppressive effect of surgical procedures, whilst others have shown blood transfusion in association with cancer surgery to have an adverse effect on ultimate prognosis. We have previously demonstrated enhanced growth of tumor metastases, in rats following allogeneic blood transfusion and surgery. Polyadenylic-polyuridylic acid (poly A-poly U) has been reported to stimulate immune responses. In this report, we have investigated the effectiveness of poly A-poly U as an adjuvant to blood transfusion and surgical procedures in BN rats bearing artificial lung metastases. Significantly reduced tumor growth was observed, following poly A-poly U adjuvant treatment. These results lead to serious contemplation of the use of this drug as adjuvant therapy in blood transfused and surgically treated patients.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00199153
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Electron ionization rate in III–V ternary semiconductors (1987)
    Springer
    Applied physics 43 (1987), S. 105-109 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 72.15 ; 79.20
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Theoretical calculations are presented for the ionization rate of electrons in III–V ternary semiconductor compounds considering alloy scattering and carrier-carrier interaction, in addition to optical phonon scattering and ionization scattering. However, alloy scattering is found to be a weak interaction. Fairly good agreement is obtained for Ga1−x In x As withx=0.14 and 0.53 with the experimental results and for Ga0.5 Al0.5 As with the existing theoretical result which used an indirect method. The alloy scattering potential has been taken in the form of energy band-gap difference. The calculations can be used for any ternary semi-conductor.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00617961
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Hot-electron drift velocity in III–V semiconductors under the condition of impact ionization (1987)
    Springer
    Applied physics 43 (1987), S. 53-60 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 72.15 ; 79.20
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract A calculation has been carried out for the drift velocity of electrons in the highfield region under the condition of impact ionization in III–V semiconductor compounds. The energy-balance equation of the one-electron model has been solved considering alloy scattering and carrier-carrier interaction, in addition to optical phonon and ionization scattering. Fairly good agreement is obtained for GaAs with the available experimental and Monte-Carlo results. Graphs for the high-field drift velocity has also been plotted for Ga1−x InxAs (x = 0.53) at different ratios of ionization mean-free path and optical phonon mean-free path. The plot of high-field drift velocity versus ionization rate reveals that the high-field drift velocity strongly depends on the ionization rate of carriers, and vice versa.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00615206
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    Laser microprobe mass spectrometry (1987)
    [s.l.] : Nature Publishing Group
    Nature 329 (1987), S. 183-184 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] THE development of new, sophisticated metallic alloys and organic compounds has led to a revolution in the materials world. New alloys, compounds and composite materials have been developed to meet a continual demand for superior mechanical, electrical, magnetic or thermal performances. The ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/329183a0
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 8
    Digitale Medien
    Digitale Medien
    A composite stellar model of geostrophic flows I (1987)
    Springer
    Astrophysics and space science 139 (1987), S. 413-419 
    Details
    ISSN: 1572-946X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract This paper has been presented the geometric study and solutions of the electromagnetogeostrophic flows, and spatially the geometry of magnetic and current lines are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00644368
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    The geometry of magnetic fieldlines in magnetogeostrophic flows (1987)
    Springer
    Astrophysics and space science 137 (1987), S. 23-31 
    Details
    ISSN: 1572-946X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract It is proved that the only circulation preserving magnetogeostrophic flows whose current density is lamellar, and bears a constant on a current density vector have (1) a plane motion of constant current density (on which certain unsteady potential motions may be superposed) and (2) a particular circular helical motion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00641617
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 10
    Digitale Medien
    Digitale Medien
    Lattice defects and the effect of Melment on the hydration of alite (1987)
    Springer
    Journal of materials science 22 (1987), S. 2751-2758 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract The hydration of alite has been studied in the presence of different concentrations of the superplasticizer Melment by using various experimental techniques. Heat of hydration and non-evaporable water content determinations show that Melment retards the hydration; pH measurements indicate that in presence of Melment, Ca2+ ion dissolution is reduced. Zeta potential measurements give definite proof that Melment molecules are adsorbed at alite surfaces and the retardation of hydration may be due to adsorption. Thermoelectric power measurements prove that the material is an n-type semiconductor, whereas electrical conductivity measurements of solid pellets of C3S (C = CaO, S = SiO2) show that the material is an intrinsic semiconductor above 746 K and an extrinsic semiconductor below 746 K. Extrinsic semiconductivity may be due to the presence of defects or impurities in the crystal lattice. The results also show that oxide ion vacancies are created in the crystal lattice and the reactivity of C3S is related to the defects. Probably Melment molecules are adsorbed at the sites of defects and oxide ion vacancies and hence retard the hydration.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01086467
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...