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  • 1
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    A novel technique for investigation of complete and partial anisotropic wetting on structured surface by X-ray microtomography (2015)
    American Institute of Physics
    Details
    Publication Date: 2015-02-01
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Published by American Institute of Physics
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  • 2
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    LDV characterization and visualization of the liquid velocity field underneath an impacting drop in isothermal conditions (2013)
    Springer
    Details
    Publication Date: 2013-09-01
    Print ISSN: 0723-4864
    Electronic ISSN: 1432-1114
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 3
    Electronic Resource
    Electronic Resource
    Multiple non-linear interaction of Rossby waves via zonal flow (1984)
    Springer
    Meteorology and atmospheric physics 33 (1984), S. 31-37 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Die nichtlineare Wechselwirkung zwischen großskaligen Rossby-Wellen wird mit Anwendung eines spektralen Modells einer barotropen Atmosphäre in sphärischer Geometrie einer Betrachtung unterzogen. Es wurde gefunden, daß es, wenn eine willkürliche Zahl von zonalen Komponenten in Betracht gezogen wird, möglich ist, die nichtlineare Energie- und Entropie-Strömung zwischen Rossby-Wellen vorherzusagen, deren Wechselwirkung mit einfacher triadischer Resonanz nicht vorhergesagt werden kann. Mit Beziehung auf die Ergebnisse einer Arbeit von Baines wird gezeigt, daß eine solche Art von zonal mittlerer, nichtlinearer Energieströmung imstande ist, einige wichtige Besonderheiten der numerischen Integration von verkürzten Modellen mit einer großen Zahl von Komponenten zu erklären, und als Folgerung an einigen Besonderheiten der großskaligen Zirkulation schuld sein könnte.
    Notes: Summary The non-linear interaction between large-scale Rossby waves is considered making use of a spectral model of a barotropic atmosphere in spherical geometry. It is found that, if an arbitrary number of zonal components is taken into account it is possible to predict the non-linear energy and enstrophy flux between Rossby waves whose interaction cannot be predicted by single triadic resonance. It is shown, referring to the results of a paper by Baines, that such kind of, zonally mediated, non-linear energy flux is capable of explaining some relevant features of numerical integrations of truncated models with a large number of components and, could, as a consequence be responsible of some features of the large-scale circulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265427
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  • 4
    Electronic Resource
    Electronic Resource
    Surface organometallic chemistry on metals. Application to chemicals and fine chemicals (1997)
    Springer
    Topics in catalysis 4 (1997), S. 211-216 
    Details
    ISSN: 1572-9028
    Keywords: surface organometallic chemistry ; metals ; catalysis ; fine chemicals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Some applications of surface organometallic chemistry on metals to catalysis are presented, showing the great importance of the modification of a metallic surface by organometallic compounds on its catalytic properties. The selective hydrogenation of α–β unsaturated aldehydes such as citral (Z and E) can be achieved on rhodium–tin catalysts. While rhodium alone is relatively unselective, geraniol (and nerol) can be obtained selectively (〉 98%) without a significant loss of activity by use of a rhodium–tin catalyst showing a typical ligand effect of the organotin fragment on the surface. Similarly, in the isomerization of (+) 3-carene into (+) 2-carene or the dehydrogenation of butan–2–ol into methyl ethyl ketone, the selectivity into the desired product is increased by introduction of small amounts of tin which will form adatoms poisoning unselective sites. An alloying effect of tin is also presented in the dehydrogenation reaction of isobutane in isobutene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019100608520
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  • 5
    Electronic Resource
    Electronic Resource
    Experimental study of the porosity of loose stacks of stiff cylindrical fibres: Influence of the aspect ratio of fibres (2000)
    Springer
    The European physical journal 13 (2000), S. 571-578 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 45.70.-n Granular systems - 46.65.+g Random phenomena and media - 61.43.Gt Powders, porous materials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The aim of this work is to study the porosity of three-dimensional and two-dimensional packing of stiff cylindrical fibres according to their aspect ratio. First, we have carried out an experimental study of the porosity for 3D and 2D packing. In this last case, the elementary representative surfaces have been determined. Then, an attempt of interpretation of the porosity variations for 2D stacks has been realized on the basis of the excluded volume theory and a variation law has been proposed. To conclude, we have studied the relevance of a simplified packing model based on a single geometry of the defects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510050069
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  • 6
    Electronic Resource
    Electronic Resource
    Macroscopic evidence of quantum coherent oscillations of the total spin in the Mn-[ $\mathsf{3\times3}$ ] molecular nanomagnet (2003)
    Springer
    The European physical journal 36 (2003), S. 169-173 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Molecular nanomagnets, besides promising to open new frontiers in technology, have attracted huge interest in the scientific community because they can exhibit the phenomenon known as quantum tunnelling of the magnetization, i.e. coherent fluctuations of the direction of the total spin vector. In this paper we study a different quantum phenomenon involving fluctuations of the magnitude of the total spin vector. These fluctuations are related to the mixing between states with different spin quantum number, and imply new macroscopic effects, which we theoretically investigated in the Mn-[ $\mathsf{3\times3}$ grid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2003-00331-0
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of estradiol on parathyroid cell activity (1989)
    Springer
    Cellular and molecular life sciences 45 (1989), S. 1121-1123 
    Details
    ISSN: 1420-9071
    Keywords: Estradiol ; parathyroid ; exocytosis ; membrane synthesis ; rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Beta-estradiol-3-benzoate provoked an initial centrifugal membrane shift in rat parathyroid cells and, later, enlargement of the compartments concerned with parathyroid hormone secretion, which suggests that estradiol modulates not only transport and release of parathyroid hormone but also the capacity for its synthesis, packaging and storage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01950176
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  • 8
    Electronic Resource
    Electronic Resource
    Changes in erythrocyte membrane lipid composition affect the transient decrease in membrane order which accompanies insulin receptor down-regulation (1992)
    Springer
    Cellular and molecular life sciences 48 (1992), S. 36-39 
    Details
    ISSN: 1420-9071
    Keywords: Erythrocyte ; insulin receptor ; receptor endocytosis ; EPR ; membrane order ; membrane lipids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract We have recently demonstrated, using electron paramagnetic resonance (EPR) spectroscopy, that insulin receptor internalization in response to insulin incubation (down-regulation) in human erythrocytes is accompanied by a transient decrease in membrane order, as measured by the 2T′‖ order parameter. Since membrane lipids play such an important role in receptor internalization, we investigated the possible effects that an alteration of the normally-occurring lipid profile might have on down-regulation and the concomitant transient decrease in membrane order. Consequently, human erythrocytes enriched with cholesterol and erythrocytes from cirrhotic patients were examined, because both of these groups of cells have a higher cholesterol/phospholipid molar ratio (CH/PL) than controls. The 5-nitroxystearate spin label, which inserts into the lipid bilayer of cell membranes, was used to monitor changes in 2T′‖ for a 3-h period at 37°C. We report here that both cholesterol-enriched and cirrhotic erythrocytes do not down-regulate, as demonstrated by binding assays, and that they do not show the typical transient decrease in membrane order observed in controls. The results seem to indicate that a more ordered membrane inhibits internalization of the insulin receptor in erythrocytes, and that an increase in membrane disorder is necessary for insulin receptor down-regulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01923602
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  • 9
    Electronic Resource
    Electronic Resource
    Proliferation and cell loss of human leukemic cell subpopulations in liquid culture (1988)
    Springer
    Cellular and molecular life sciences 44 (1988), S. 245-247 
    Details
    ISSN: 1420-9071
    Keywords: Acute myelogenous leukemia ; cell subpopulations ; cell loss ; kinetics in culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A kinetic study was performed on leukemic blasts from patients with acute myeloid leukemia, separated into 2 subpopulations by a specific density gradient. The growth curve and the [3H]-thymidine uptake were simultaneously analyzed. While cumulative nucleotide uptake fitted with the growth kinetics in the low-density fraction, such a concordance was not found in the high-density subpopulation. That indicated the occurrence of simultaneous growth and loss in the high density fraction, which could not be evaluated by a simple numerical determination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01941723
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  • 10
    Electronic Resource
    Electronic Resource
    Lifting Surface in Subsonic Unsteady Regime (1999)
    Springer
    Meccanica 34 (1999), S. 1-27 
    Details
    ISSN: 1572-9648
    Keywords: Acceleration potential ; Integration in principal part ; Isolation of singularities ; Discretization ; Solid–fluid interaction.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The paper refers to the solution of the integral equation for the acceleration (or pressure) potential for the study of subsonic linearized unsteady flow in view of aeroelastic applications. The case considered is relevant to a trapezoidal wing infinitely thin surface without discontinuities. As is well known [1, 2], the kernel of the integral equation exhibits three singularities, two of which are integrable in elementary form, whereas, for the third one integration in principal part according to Hadamard's rule is necessary. The kernel is therefore reworked in such a way that all the singularities are separated from the regular part, and eventually the discretization is performed in such a way that only the regular part is to be recalculated for each new value of the reduced frequency. Convergence tests, comparison with other methods of solution, and time saving associated with the technique of separation are also shown. Sommario. II lavoro tratta la risoluzione del problema relativo alla equazione integrale nel potenziale di accelerazione (o di pressione) per lo studio di una corrente subsonica linearizzata nonstazionaria, in vista di applicazioni aeroelastiche. Il caso considerato è quello di una superficie alare a pianta trapezoidale in assenza di discontinuità di spessore infinitesimo. Come è noto [1, 2], il nucleo della equazione integrale in parola presenta tre singolarità, due sole delle quali sono integrabili in forma elementare, (o riconducibili ad essa), mentre per la terza è necessario far ricorso alla integrazione in parte principale alla Hadamard. Il nucleo stesso viene quindi rielaborato in modo da isolare tutte le singolarità dalla componente regolare del nucleo; si procede così alla discretizzazione dell' equazione integrale, e, per ogni valore della frequenza ridotta, va ricalcolata solo la parte regolare della matrice risolvente. Vengono poi effettuati tests di convergenza, confronti con altri metodi di soluzione, analisi sui tempi di calcolo e risparmio di tempo di calcolo dovuto alla tecnica di separazione.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004311314673
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