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  • 1
    Digitale Medien
    Digitale Medien
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 4899-4905 
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The evolution of surface features during the growth of a coating is of vital importance for the resulting overall film structure and morphology. In the low substrate temperature regime (T/TM〈0.3) the growth front of a single component material roughens due to fluctuations in the incoming particle beam (kinetic roughening) and relaxes via surface diffusion. The continuous deposition process thus leads to the evolution of surface features of large lateral extensions compared to the extension of the film-forming particles. A detailed experimental study of the surface evolution of sputtered copper coatings with thicknesses ranging from 300 to 105 A(ring) for a working gas pressure of 0.4 Pa is presented. The roughening as well as the relaxation of the film growth front is studied by means of atomic force microscopy (AFM). The increasing lateral extension of the surface features during growth (coarsening) can well be described by a deterministic continuum model of surface diffusion. The model is capable of predicting the evolution of the surface profile's Fourier transform for increasing deposition times (i.e., increasing film thickness). A retransformation from k space to real space allows for a direct comparison of surface profiles obtained from AFM scans with those resulting from the continuum model and gives good qualitative agreement of the profile shapes. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
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  • 2
    facet.materialart.
    Unbekannt
    Berlin : Periodicals Archive Online (PAO)
    Klio. 15 (1918) 188-195 
    ISSN: 0075-6334
    Thema: Geschichte , Klassische Philologie, Byzantinistik, Mittellateinische und Neugriechische Philologie, Neulatein
    Notizen: MITTEILUNGEN UND NACHRICHTEN
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  • 3
    ISSN: 1434-4475
    Schlagwort(e): Diphenylphosphanyl substituted 5-fluoro-uracils ; X-ray structure determination ; Tautomerism ; NMR ; Vibrational and mass spectra
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary 5-Fluoro-uracil (1) reacts with chloro-diphenylphosphane to 5-fluoro-N(1), N(3)-bis(diphenylphosphanyl)uracil (3) which was characterized by X-ray crystallography, IR, and mass spectra.19F,31P{1H},13C{1H}, and1H NMR spectra indicate that3 rearranges inTHF solution to some extent to the tautomeric 5-fluoro-O(2), O(4)-bis(diphenylphosphanyl)uracil (4). If the solvent contains traces of water, Ph2P(O)-PPh2 (6) and uracil derivatives are formed by hydrolysis.
    Materialart: Digitale Medien
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    International journal of earth sciences 85 (1996), S. 800-821 
    ISSN: 1437-3262
    Schlagwort(e): East Antarctica ; Greenville ; Pan-African ; Rodinia ; Heimefrontfjella
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract The Heimefrontfjella mountains, Western Dronning Maud Land (East Antarctica), are dominantly composed of Grenville-aged (≈ 1.1 Ga) rocks, which were reworked during the Pan -African orogeny at ≈500 Ma. Three discontinuity-bounded Grenville-aged terranes have been recognized namely (from north to south) the Kottas, Sivorg and Vardeklettane terranes. The terranes contain their own characteristic lithological assemblages, although each is made up of an early supracrustal sequence of metavolcanic and/or metasedimentary gneisses, intruded by various (predominantly granitoid) suites. No older basement upon which the protoliths of these older gneisses were deposited has been recognized. In each terrane the older layered gneisses were intruded by various plutonic suites ranging in age from ≈ 1150 to ≈1000 Ma. The Vardeklettane terrane is characterized by abundant charnockites and two-pyroxene granulite facies parageneses in metabasites, whereas the Sivorg and Kottas terranes were metamorphosed to amphibolite facies grade. P-T estimates show that peak metamorphic conditions changed from ≈600°C at 8 kbar in the south, to ≈700 °C at 4 kbar in the northern Sivorg terrane. Regional greenschist retrogression of high-grade assemblages may be of Pan-African age. The Heimefrontfjella terranes were juxtaposed and pervasively deformed during a complex and protracted period of E-W collision orogenesis in a transpressive regime at ≈ 1.1 Ga. This is manifest as early, gently dipping thrust-related shear fabrics (D1), succeeded by the initiation of an important (D2) steep dextral shear zone (Heimefront shear zone, HSZ), during which the early fabrics and structures were steepened and rotated in an anticlockwise sense. The HSZ is a curvilinear structure which changes from a dextral oblique strike-slip lateral ramp in the north to a steep dip-slip frontal ramp in the south, where it forms the boundary between the Sivorg and Vardeklettane terranes. The Pan-African event is manifested as discrete, low- to medium-temperature ductile to brittle shears (D3) and numerous K/Ar cooling ages.
    Materialart: Digitale Medien
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  • 5
    ISSN: 1432-2102
    Schlagwort(e): Schlüsselwörter MRT ; Kiefergelenk ; Diskusverlagerung ; Morphometrie ; Key words MRI ; Temporomandibular joint ; Anterior disk displacement ; Metric analysis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Summary In order to evaluate magnetic resonance imaging (MRI) changes in correlation with different degrees of internal derangement of the temporomandibular joint, we evaluated 117 joints of 59 symptomatic patients and 31 volunteers. Data analysis included morphologic and morphometric characteristics. Sixteen joints (19 %) were considered normal, 40 demonstrated anterior displacement with reduction (47 %) and 27 anterior displacement without reduction (32 %). In three of the volunteers anterior displacement with reduction was noted. Advancing anterior position of the disk was associated with reduced ability to open the mouth, progressive deformity and shortening of the disk, thinning of the bilaminar zone, regressive and proliferative bony changes of the condyle, reduced translatory movement of the disk and condyle, thinning of joint space, cranial and dorsal displacement of the condyle and flattening of the slope of the tuberculum. In addition to alterations in condylar and disk morphology, MRI can demonstrate various additional measurable changes that correlate well with the degree of anterior disk displacement.
    Notizen: Zusammenfassung Um den Einfluß der Diskusverlagerung im Kiefergelenk auf die Gelenkbinnenstrukturen zu untersuchen, wurden insgesamt 117 Gelenke von 59 symptomatischen Patienten und 31 asymptomatischen Probanden in der MRT untersucht und die Gelenkbinnenstrukturen sowohl morphologisch wie morphometrisch beurteilt. Im Patientengut lag 16mal eine normale Diskusposition (NDP) (19 %), 40mal eine Vorverlagerung mit Reposition (VMR) (47 %) und 27mal eine Vorverlagerung ohne Reposition (VOR) (32 %) vor. Unter den Normalpersonen zeigten 3 eine VMR. Mit zunehmender Diskusvorverlagerung zeigte sich eine kleiner werdende maximale Mundöffnung, ein zunehmend deformierter und verkürzter Diskus, eine Ausdünnung der bilaminären Zone, eine Abnahme des Durchmessers und zunehmende Entrundung des Processus condylaris, eine verminderte translatorische Diskus- und Kondylusbeweglichkeit, eine Verschmälerung der Gelenkspaltweite, eine Verlagerung des Processus condylaris in geschlossener Mundposition nach kranial und dorsal und eine Abflachung des Kondylenbahnwinkels. Neben der Morphologie des Diskus und Kondylus bzw. deren Morphologie lassen sich damit eine ganze Reihe weiterer magnetresonanztomographisch quantifizierbarer Befunde im Rahmen von Verlagerungen des Diskus im Temporomandibulargelenk darstellen.
    Materialart: Digitale Medien
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Der Internist 40 (1999), S. M302 
    ISSN: 1432-1289
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Microsystem technologies 2 (1996), S. 130-134 
    ISSN: 1432-1858
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Technik allgemein
    Notizen: Abstract  For the production of microstructured ceramic parts, development efforts are necessary in the field of powder synthesis as well as in the area of shaping. Several processes have been developed. Powder synthesis was performed starting from metal organic precursors and using a two stage thermal process. Shaping was performed by sol-gel methods, by pressing of a ceramic slurry or an organic precursor paste as well as by direct electrophoretic deposition of gels in a microstructured form. An overview is given on the methods and the results.
    Materialart: Digitale Medien
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Microsystem technologies 4 (1998), S. 125-127 
    ISSN: 1432-1858
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Technik allgemein
    Materialart: Digitale Medien
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  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Journal of orofacial orthopedics 56 (1995), S. 318-326 
    ISSN: 1615-6714
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Summary In our study of 107 patients, for whom data derived from clinical functional analysis, axiography and, in part, magnet resonance imaging, were present, we were abte to show that in routine orthodontic diagnosis the use of panotamie X-ray in the normal course of a general examination of the mandibular joint can also provide important indications of the presence of cranio-mandibular disorders. The panoramic X-ray revealed that in patients withAngle class II and front deep and open bite there were significantly more changes in the form of the condyles. A definite morphologie finding of a retracted fovea pterygoidea was found frequently in patients with anterior disk replacement with or withour reduction. Lastly, the panoramic X-ray showed that a change in form of the condyles, with in some cases a serlous arthrosis, occurs significantly most frequent in patients with anterior displacement without reduction.
    Notizen: Zusammenfassung In unserer Studie konnte anhand von 107 Patienten, bei denen klinisch/axiographische und zum Teil magnetresonanztomographsche Funktionsbefunde vorlagen, gezeigt werden, daß die Panoramaschichtaufnahme innerhalb der kieferorthopädischen Routmediagnostik im Sinne einer orientierenden Übersichr der Kiefergelenke wichtige Hinweise auf das Vorliegen von Funktionsstörungen geben kann. Patienten mit dentaler Klasse-II-Bißlage und den Frontzahnanomalien Tiefbiß und offener Biß wiesen in der Panoramaschichtaufnahme signifikant häufiger Formveränderungen, der Kondylen auf. Der spezifische morphologische Kiefergelenkbefund einer Einziehung der Fovea pterygoidea trat vermehrt in Fällen mit anteriorer Diskusverlagerung mit oder ohne Reposition auf Formveranderte Kiefergelenkköpte mit teilweise gravierenden Kiefergelenkarthrosen waren signifikant am häuflgsten bei Patienten mit anteriorer Diskusverlagerung ohne Reposifion aufzufinden.
    Materialart: Digitale Medien
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  • 10
    ISSN: 0016-7835
    Schlagwort(e): Key words Structural analysis ; Bashkirian anticlinorium ; SW Urals ; URSEIS '95 profile
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract The Bashkirian anticlinorium of the southwestern Urals shows a much more complex structural architecture and tectonic evolution than previously known. Pre-Uralian Proterozoic extensional and compressional structures controlled significantly the Uralian tectonic convergence. A long-lasting Proterozoic rift process created extensional basement structures and a Riphean basin topography which influenced the formation of the western fold-and-thrust-belt with inversion structures during the Uralian deformation. A complete orogenic cycle during Cadomian times, including terrane accretion at the eastern margin of the East European platform, resulted in a high-level Cadomian basement complex, which controlled the onset of Uralian deformation, and resulted in intense imbrication and tectonic stacking in the subjacent footwall of the Main Uralian fault. The Uralian orogenic evolution can be subdivided into three deformation stages with differently oriented stress regimes. Tectonic convergence started in the Late Devonian with ophiolite obduction, tectonic accretion of basin and slope units and early flysch deposits (Zilair flysch). The accretionary complex prograded from the SE to the NW. Continuous NW/SE-directed convergence resulted finally in the formation of an early orogenic wedge thrusting the Cadomian basement complex onto the East European platform. The main tectonic shortening was connected with these two stages and, although not well constrained, appears to be of Late Devonian to Carboniferous age. In the Permian a final stage of E–W compression is observed throughout the SW Urals. In the west the fold-and-thrust-belt prograded to the west with reactivation of former extensional structures and minor shortening. In the east this phase was related to intense back thrusting. The East European platform was subducted beneath the Magnitogorsk magmatic arc during the Late Paleozoic collision. The thick and cold East European platform reacted as a stable rigid block which resulted in a narrow zone of intense crustal shortening, tectonic stacking and high strain at its eastern margin. Whereas the first orogenic wedge is of thick-skinned type with the involvement of crystalline basement, even the later west-directed wedge is not typically thin-skinned as the depth of the basal detachment appears below 15 km and the involvement of Archean basement can be assumed.
    Materialart: Digitale Medien
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