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  • 1
    Online-Ressource
    Online-Ressource
    Energy Conservation in Biological Membranes : 29. Colloquium, 6. -8. April 1978. (1978)
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Details
    Schlagwort(e): Electronic books.
    Materialart: Online-Ressource
    Seiten: 1 online resource (296 pages)
    Ausgabe: 1st ed.
    ISBN: 9783642812873
    Serie: Colloquium der Gesellschaft Für Biologische Chemie in Mosbach Baden Series ; v.29
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=6574338
    Sprache: Englisch
    Standort Signatur Einschränkungen Verfügbarkeit
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    GEOMAR EBL
  • 2
    Online-Ressource
    Online-Ressource
    Relativistic Gravity Research With Emphasis on Experiments and Observations : Proceedings of the 81 WE-Heraeus-Seminar Held at the Physikzentrum, Bad Honnef, Germany 2-6 September 1991 (1992)
    Berlin, Heidelberg : Springer Berlin Heidelberg
    Details Verfügbarkeit
    Schlagwort(e): Physics ; Geophysics ; Gravitation ; Observations, Astronomical ; Astronomy Observations ; Astrophysics ; Physics ; Physical geography ; Astronomy ; Astrophysics ; Relativity (Physics) ; Physics ; Relativity and Cosmology ; Astronomy ; Geophysics/Geodesy ; Astrophysics
    Beschreibung / Inhaltsverzeichnis: Gravitational lensing -- The general relativistic N-body problem -- Observable relativistic effects in the solar system -- New results for relativistic parameters from the analysis of llr measurements -- Very-Long-Baseline Interferometry in astro-, geo-, and gravitational physics -- A gradiometer experiment to detect the gravitomagnetic field of the earth -- The international atomic time and the PTB's clocks -- Gravity-wave astrophysics -- The GEO-project a long-baseline laser interferometer for the detection of gravitational waves -- The optics of an interferometric gravitational-wave antenna -- Mechanical aspects in interferometric gravity wave detectors -- Fermion and Boson stars -- Black holes with hair -- Gravitational fields of rapidly rotating neutron stars: Theoretical foundation -- Gravitational fields of rapidly rotating neutron stars: Numerical results -- A new laboratory experiment for testing Newton's gravitational law -- Matter wave interferometry and why quantum objects are fundamental for establishing a gravitational theory
    Materialart: Online-Ressource
    Seiten: 1 Online-Ressource (VIII, 412 p. 50 illus)
    Ausgabe: Springer eBook Collection. Physics and Astronomy
    ISBN: 9783540474838 , 9783540561804
    Serie: Lecture Notes in Physics 410
    URL: http://dx.doi.org/10.1007/3-540-56180-3
    DOI: 10.1007/3-540-56180-3
    Sprache: Englisch
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Proteolytic Inactivation of Substance P and Neurokinin A in the Longitudinal Muscle Layer of Guinea Pig Small Intestine (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 47 (1986), S. 0 
    Details
    ISSN: 1471-4159
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Abstract: Membrane vesicles, showing a 21 ± 2-fold enrichment in the activity of 5′-nucleotidase and a 11 ± 4-fold enrichment in the activity of angiotensin-converting enzyme relative to homogenate, were prepared from the myenteric plexus-containing longitudinal muscle layer of guinea pig ileum. Incubation of the vesicles with substance P and neurokinin A led to degradation of the peptides, and metabolites were isolated by reverse-phase HPLC and identified by amino acid composition. Cleavages of substance P between Glu6-Phe7, Phe7-Phe8, and Gly9-Leu10 and of neurokinin A between Gly8-Leu9 were observed and could be inhibited in a dose-dependent manner by phosphoramidon, an inhibitor of neutral endopeptidase 24.11. Formation of these metabolites was not completely inhibited by this agent, indicating that a phosphoramidon-insensitive form of endopeptidase 24.11 was present in the gut. Substance P was resistant to degradation by aminopeptidases, but neurokinin A was a substrate for bestatin-sensitive aminopeptidase(s), so that the neurokinin A (3–10) fragment represented the predominant metabolite in the chromatograms. The rate of formation of all the metabolites was not inhibited by ena-lapril and not enhanced by an increased Cl− concentration, indicating that angiotensin-converting enzyme was unimportant in the degradation process. Degradation of neurokinin A by the vesicles (Km 30 μM; Vmax 7.2 ±0.8 nmol min−1 mg of protein−1) was more rapid than degradation of substance P (Km 25 μM; Vmax 4.4 ± 0.4 nmol min−1 mg of protein−1).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1471-4159.1986.tb00690.x
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    A model of dc glow discharges with abnormal cathode fall (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 154-162 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A model for an abnormal glow discharge, including a self-consistent analysis of the cathode fall, was developed. It combines microscopic particle simulation by means of Monte Carlo methods with a fluid model of the gas discharge. The model allows calculations of the steady-state electrical field distribution, the charged-particle densities, and the current densities along the axis of the discharge. The model was used to simulate a glow discharge in 80% He and 20% SF6 at a pressure of 8 Torr with a current density of 1 A/cm2. The computed discharge voltage agrees well with measured values. The computer code can easily be modified to describe the charged-particle densities and energies not only in the cathode fall region, but in any plasma boundary layer.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.345294
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    CO2-laser-enhanced electron attachment in externally sustained diffuse gas discharges containing vinyl chloride (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 6123-6127 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Photon-enhanced attachment can be used as a conduction-control mechanism for diffuse discharge opening switches. This paper presents experimental results on photon-enhanced attachment based on vibrational excitation of vinyl chloride using a line-tunable CO2 laser. Strong resistance increases and discharge turnoff have been observed in low-current, externally sustained dc discharges. The influence of experimental parameters such as discharge pressure, attacher concentration, discharge voltage, and laser wavelength are presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.342114
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  • 6
    Digitale Medien
    Digitale Medien
    Optimization of gas mixtures for electron-beam-controlled diffuse discharge opening switches (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 1372-1378 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Electron-beam-controlled diffuse discharges are promising candidates for high-power opening switches in inductive energy storage circuits. An additive of an attaching gas must be used to obtain short opening times when the electron beam is turned off. A high switch efficiency requires low loss operation during conduction. This paper presents methods to optimize gas mixtures for such discharges. Gas mixtures utilizing one or two attaching gases are used and the effect of gas additives which influence the drift velocity is investigated. Experiments on the Jsw-E/N characteristics, the dc E/N breakdown limit, and the glow-to-arc transition E/N limit depending on the energy loading of the discharge are presented and the implications of these results to opening switches are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.339966
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Charge-transfer collisions between He+2 ions and N2: Branching ratio into vibrational states (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 6041-6044 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A plasma-mixing device in which a helium plasma beam is crossed with a molecular nitrogen beam was used to measure the branching ratio of the excitation of individual vibrational levels of the B2Σ electronic state of the molecular nitrogen ion in charge-transfer collisions between He+2 ions and ground-state N2 molecules. The branching ratio of the excitation of individual vibrational levels of the C3Π electronic state of the neutral nitrogen molecule due to the resonant energy-transfer collisions between argon metastables and ground-state nitrogen molecules was also measured using a plasma beam of a mixture of argon and helium. These results allow comparison of our measurements with results obtained using other techniques.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.345213
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  • 8
    Digitale Medien
    Digitale Medien
    Field-enhancement calculations for a field-distortion triggered spark gap (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 790-792 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We present the results of numerical field calculation which supplement a recent article in which we described a new design concept for field-distortion triggered spark gaps. The calculations verify the shielding and field enhancement assumptions made in the article, and they provide insight into the interaction of the design tradeoffs associated with simultaneously maximizing the holdoff voltage and the triggering capability of the gap.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.338182
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Monte Carlo calculations on the influence of attachment on the thermalization of secondary electrons in an electron-beam-sustained discharge (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 120-125 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Monte Carlo calculations have been performed on the relaxation of initial secondary electrons in electron-beam-sustained discharges at low values of the reduced electric field strength, E/N. In pure nitrogen, thermalizing electrons contribute to a secondary maximum of the distribution function in the energy range between 3.5 and 8 eV where the cross section for inelastic collisions in nitrogen has a minimum. This maximum is not found if the secondary electrons are produced at low energies. Admixtures of attachers with an attachment cross section in this energy range cause significant attachment of the initial secondary electrons. The calculations also demonstrate that even in molecular buffer gases, the inelastic cross sections of the attacher admixture have to be considered to gain correct distribution functions and attachment rates.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.338869
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  • 10
    Digitale Medien
    Digitale Medien
    A new design concept for field distortion trigger spark gaps (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 2507-2511 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A common field distortion triggered spark gap utilizing geometric field enhancement at sharp edges usually operates in a cascade mode via the trigger electrode. A new trigger concept is proposed allowing strong field enhancement and direct breakdown between the two main electrodes. A test setup was designed to prove the feasibility of this concept. Experimental results on delay and jitter depending on percent breakdown voltage are presented. Best results achieved are a delay of 9 ns and a jitter of 2 ns at a self-breakdown voltage of 15 kV.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.335436
    Standort Signatur Einschränkungen Verfügbarkeit
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