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  • 1985-1989  (3)
  • 1970-1974  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Green function, capacity and sample path properties for a class of hypoelliptic diffusion processes (1989)
    Springer
    Probability theory and related fields 83 (1989), S. 219-264 
    Details
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary This paper presents a detailed probabilistic study of a class of hypoelliptic diffusion processes in ℝ3 including the so-called Brownian motion on the Heisenberg group. We obtain precise estimates for the Green function of the process and the capcity of small compact sets. These estimates are applied to various sample path properties such as the existence of double points or the asymptotic behavior of the volume of a small tubular neighborhood of the path. Differences with the elliptic case are emphasized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00333149
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Influence of the mass asymmetry of the entrance channel on incomplete fusion processes (1989)
    Springer
    The European physical journal 334 (1989), S. 315-327 
    Details
    ISSN: 1434-601X
    Keywords: 25.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The angular and velocity distributions of incomplete fusion residues have been measured, around 30 AMeV projectile incident energy, for a number of systems with varying mass asymmetries, from the most asymmetric S+Cu, to the almost symmetric Ar+Ca. The main experimental finding is that the parallel width of the velocity distribution increases sharply for decreasing asymmetries, while the perpendicular width remains nearly constant. Using, as data, the widths and mean values of the velocity distributions, it was possible to derive the number of preequilibrium particles emitted by the projectile and by the target. It was found that target emission becomes noticeable only when the center of mass velocity of the target, at nuclear contact, exceeds approximately 2.5 cm/ns. This underlines the relevance of the center of mass velocities in the preequilibrium emission and incomplete fusion processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284559
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Gastric clearance of alpha-1-antitrypsin under cimetidine perfusion new test to detect protein-losing gastropathy? (1986)
    Springer
    Digestive diseases and sciences 31 (1986), S. 12-15 
    Details
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01347903
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Contribution à l'étude infrastructurale du système neurosécréteur rétrocérébral chez Locusta migratoria migratorioides (R. et F.) (1970)
    Springer
    Cell & tissue research 111 (1970), S. 471-482 
    Details
    ISSN: 1432-0878
    Keywords: Corpora cardiaca ; Insects ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé L'étude infrastructurale des corpora cardiaca de Locusta révèle l'existence de 3 types de fibres neurosécrétrices (portion neurohémale) et d'un seul type de cellules glandulaires (portion endocrine intrinsèque). Elle permet également d'envisager les modalités du rejet des sécrétions exogènes et endogènes.
    Notes: Summary An ultrastructural study of the corpora cardiaca of Locusta migratoria migratorioides shows three neurosecretory fiber types in the neurohaemal part of these organs; only one cellular type constitutes the intrinsic glandular part of the corpora cardiaca. This study also shows sites of release of stored extrinsic neurosecretory material and of products elaborated by intrinsic glandular cells of the corpora cardiaca.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00330925
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Contribution à l'étude infrastructurale du système neurosécréteur rétrocérébral chez Locusta migratoria migratorioides (R. et F.) (1970)
    Springer
    Cell & tissue research 111 (1970), S. 483-492 
    Details
    ISSN: 1432-0878
    Keywords: Neurosecretory Pathways ; Insects ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé L'étude infrastructurale des nerfs cardiaques afférents et des nerfs allato-cardiaques qui entrent dans la constitution du système neurosécréteur rétrocérébral de Locusta migratoria migratorioides (R. et F.) révèle l'existence des trois types de fibres neurosécrétrices définis dans les corpora cardiaca. Une quatrième catégorie de fibres caractérisées par la présence de vésicules claires existe dans les nerfs allato-cardiaques et dans les corpora allata. L'origine des fibres et l'évolution des grains de neurosécrétion au cours de leur transit sont envisagées.
    Notes: Summary An ultrastructural study of the nervi corporis cardiaci and nervi corporis allati, which are part of the retrocerebral neurosecretory system of Locusta migratoria migratorioides, reveals the existence of three neurosecretory fiber types. A fourth neurosecretory fibertype with electron lucent vesicles is also present in the nervi corporis allati and in the corpora allata. The fibers are characterized by differences in the size and electron opacity of the neurosecretory granules. The origin of the various neurosecretory fiber types and the evolution of the neurosecretory granules are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00330926
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    Paper (German National Licenses)
    Fulltext
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