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  • 1980-1984  (9)
  • 1965-1969  (5)
  • 1
    Digitale Medien
    Digitale Medien
    Correction. Organic Fulminates, R-O-NC. (1981)
    s.l. : American Chemical Society
    The @journal of organic chemistry 46 (1981), S. 5459-5459 
    Details
    ISSN: 1520-6904
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/jo00339a609
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  • 2
    Digitale Medien
    Digitale Medien
    A disordered ring in the molecular structure of cyclopentanecarboxamide (CYCLAM) (1981)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 37 (1981), S. 2183-2185 
    Details
    ISSN: 1600-5740
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0567740881008340
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  • 3
    Digitale Medien
    Digitale Medien
    A disordered ring in the molecular structure of cyclopentanecarboxamide (CYCLAM): addendum (1982)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 38 (1982), S. 1398-1398 
    Details
    ISSN: 1600-5740
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0567740882005974
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  • 4
    Digitale Medien
    Digitale Medien
    Light-dependent rubidium uptake into isolated mesophyll protoplasts from leaves of Pisum sativum (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 56 (1982), S. 0 
    Details
    ISSN: 1399-3054
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: A method is described for the isolation of large amounts of physiologically active protoplasts from leaves of Pisum sativum L. Rubidium uptake was determined after separation of the intact protoplasts from the loading medium by rapid centrifugation through a phthalate step gradient. In freshly isolated mesophyll protoplasts of Pisum sativum, rubidium uptake was carbonylcyanide-p-trifluoromethoxyphenylhydrazone reduced by metabolic inhibitors such as 5 μM, 0.1 mW cyanide, 2 μM DCMU and 5 mM arsenate and by dark incubation. Reduction of rubidium uptake by inhibition of aerobic respiration or the photosynthetic electron transport system demonstrates that both processes play a role in the energy supply for membrane transport in these protoplasts.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1399-3054.1982.tb00349.x
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  • 5
    Digitale Medien
    Digitale Medien
    The mobility of dilute solutions of impurities in He3 at low temperatures (1969)
    Springer
    The European physical journal 221 (1969), S. 186-210 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The mobility of impurities in He3 is calculated using Kubo's formula and assuming a quasi-particle-like behaviour of the impurities. This is reasonable in the low temperature limit. If one has to deal with charged particles having a large cross-section for the scattering of He3 quasi-particles on account of their large effective radii, this limit is as low as presumably 0.01 °K. For uncharged particles the validity of the theory is not confined to such a small region of the temperature. The mobility behaves as 1/T 2 and its dependence upon the frequency is almost that of a classical sphere experiencing a force of friction proportional to its velocity. The parameters occuring in the formula for the mobility (the effective mass and the scattering cross-section between He3 and the impurities) may in principle be determined by independent experiments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01392142
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  • 6
    Digitale Medien
    Digitale Medien
    Band structure effects in high energy ion beam surface interaction at grazing incidence (1983)
    Springer
    The European physical journal 311 (1983), S. 267-280 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The analysis of charge state distributions after the interaction of fast Li- and N-ions with a surface at grazing incidence at energies between 50 and 350 keV yields for Li a strongly suppressed and for N an enhanced fraction of neutrals in comparison to the beam-foil interaction. These findings are supported by corresponding alkali-spectra which are dominated by lines from transitions in singly ionized atoms. The experiments are consistently interpreted in terms of a two step model: (1) collisional excitation in the close vicinity of the surface and (2) modification of this population by resonant electron transfer from (to) non localized states in the conduction (valence) band to (from) the ion. The model is also applied to interpret recent beam-foil experiments where preferential populations of Rydberg levels in highly ionized atoms were found.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01415680
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  • 7
    Digitale Medien
    Digitale Medien
    Ähnlichkeit bei Randwertproblemen und ihre Anwendung in der Sandmechanik (1983)
    Springer
    Archive of applied mechanics 53 (1983), S. 27-39 
    Details
    ISSN: 1432-0681
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Beschreibung / Inhaltsverzeichnis: Summary A theory of similarity is proposed which can be applied for many problems in continuum mechanics. Therefore the structure of frequently arising boundary value problems is analysed. It is outlined that solutions are similar for power-type material laws only. In this case simple design formulae can be developed. Especially the displacement of rigid foundations in sand can be described in a simple way by the theory of similarity assuming an appropriately formulated material law. The remaining unknown parameters can be determined in model tests. The constitutive relation chosen for sand is verified by special element tests. In addition the assumptions of the theory are checked in many model tests yielding good agreement.
    Notizen: Übersicht Eine Ähnlichkeitstheorie wird vorgestellt, die bei vielen Fragestellungen in der Kontinuumsmechanik angewendet werden kann. Dazu wird die Bauart häufig auftretender Randwertprobleme untersucht. Es zeigt sich, daß nur bei Verwendung eines Stoffgesetzes vom Potenztyp die Lösungen für verschiedene Lastzustände ähnlich sind. In diesem Falle können einfache Entwurfsformeln entwickelt werden. Insbesondere können die Verschiebungen starrer Gründungskörper in Sand unter Verwendung eines passend formulierten Stoffgesetzes auf einfache Weise beschrieben werden. Die verbleibenden Unbekannten können aus Modellversuchen gewonnen werden. Das gewählte Stoffgesetz für Sand wird in speziellen Elementversuchen bestätigt. Darüber hinaus werden die Voraussetzungen für die Theorie in einer Vielzahl von Modellversuchen überprüft und ebenfalls bestätigt.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01352169
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  • 8
    Digitale Medien
    Digitale Medien
    Enzymes of gluconeogenesis in the autotroph Methanobacterium thermoautotrophicum (1983)
    Springer
    Archives of microbiology 136 (1983), S. 160-162 
    Details
    ISSN: 1432-072X
    Schlagwort(e): Methanobacterium thermoautotrophicum ; Aldolase ; Fructose 1,6-bisphosphatase ; Autotrophic ; Methanogen
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract In Methanobacterium thermoautotrophicum fructose 1,6-bisphosphate aldolase and fructose 1,6-bisphosphate phosphatase were studied, which could not be detected in previous investigations. Aldolase appeared to be a class I enzyme. Enzyme activity was only detectable in direction of aldol condensation in presence of Mg2+ and under anaerobic conditions. It was stimulated by dithioerythritol. The regulatory properties of the hexose bisphosphate phosphatase differed in many ways from those of the enzyme from other organisms.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00404793
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  • 9
    Digitale Medien
    Digitale Medien
    Effects of salicylate on HCO 3 − /Cl− exchange across the human erythrocyte membrane (1982)
    Springer
    The journal of membrane biology 65 (1982), S. 139-145 
    Details
    ISSN: 1432-1424
    Schlagwort(e): salicylate ; erythrocyte ; anion exchange ; pH ; DIDS ; CO2
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Summary Changes in extracellular pH (pH o ) in human red cell suspensions were monitored in a stopped-flow rapid reaction apparatus. A 20% suspension of washed human RBC in saline at pH 7 containing NaHCO3 and extracellular carbonic anhydrase was mixed with an equal volume of buffered saline solution at pH 6.7. Sodium salicylate, when present, was added to both the erythrocyte suspension and the buffer solution. The effects of salicylate in the therapeutic to toxic concentration range on HCO 3 − /Cl− exchange were studied at 37°C. HCO 3 − /Cl− exchange flux was estimated using the extracellular buffer capacity and the difference betweendpH o /dt using a control RBC suspension and that using a suspension of RBC whose anion exchange pathway was markedly inhibited. The results show that salicylate competitively decreases the rate of HCO 3 − /Cl− exchange, with inhibition increasing as salicylate concentration increases.K I is ∼2.4mm. At a salicylate concentration of 10mm, HCO 3 − /Cl− exchange under the conditions of our experiments was inhibited by more than 70%. These findings are consistent with the possibility that CO2 transfer in capillary bedsin vivo may be diminished in the presence of salicylate due to slowing of red cell HCO 3 − /Cl− exchange.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01870477
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  • 10
    Digitale Medien
    Digitale Medien
    Buchbesprechung (1967)
    Springer
    Acta mechanica 4 (1967), S. 398-398 
    Details
    ISSN: 1619-6937
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01591581
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