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  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 115 (2001), S. 6596-6605 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Structure and stability of endohedral fullerene Sc3N@C80 were studied by temperature-dependent Raman and infrared spectroscopy as well as by quantum-chemical [density-functional-based tight-binding] calculations. The material showed a remarkable thermal stability up to 650 K. By both theory and experiment, translational and rotational Sc3N modes were found. These modes give a direct evidence for the formation of a Sc3N–C80 bond which induces a significant reduction of the ideal Ih–C80 symmetry. From their splitting pattern a crystal structure with more than one molecule in the unit cell is proposed. According to our results: (i) a significant charge transfer from the Sc3N cluster to the C80 cage; (ii) the strength of three Sc–N bonds; (iii) the chemical bond between triscandium nitride cluster and C80 cage; and (iv) a large HOMO–LUMO gap are responsible for the high stability and abundance of Sc3N@C80. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Mathematische Annalen 8 (1875), S. 539-554 
    ISSN: 1432-1807
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Mathematische Annalen 9 (1876), S. 554-572 
    ISSN: 1432-1807
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 4
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    Berlin : Periodicals Archive Online (PAO)
    Orientalistische Literaturzeitung. 62:9/10 (1967:Sept./Okt.) 437 
    ISSN: 0030-5383
    Topics: Linguistics and Literary Studies , Ethnic Sciences , History
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  • 5
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    Berlin : Periodicals Archive Online (PAO)
    Orientalistische Literaturzeitung. 62:9/10 (1967:Sept./Okt.) 437 
    ISSN: 0030-5383
    Topics: Linguistics and Literary Studies , Ethnic Sciences , History
    Notes: Besprechungen
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  • 6
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    Berlin : Periodicals Archive Online (PAO)
    Orientalistische Literaturzeitung. 64:1/2 (1969:Jan./Feb.) 19 
    ISSN: 0030-5383
    Topics: Linguistics and Literary Studies , Ethnic Sciences , History
    Notes: Besprechungen
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Intensive care medicine 26 (2000), S. 84-87 
    ISSN: 1432-1238
    Keywords: Key words High-frequency ventilation ; Noise production ; Newborn ; Neonatal intensive care unit ; Decibel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To test the hypothesis that neonatal high-frequency ventilators create different noise levels depending upon ventilator settings and device-specific properties.¶Materials: Three neonatal ventilators with built-in high-frequency options (Babylog 8000, Infant Star, Stephanie) and an exclusive high-frequency oscillator (SensorMedics 3100A).¶Measurements: Noise levels were recorded by a microphone and measured by a decibel recording device at a defined distance from a test lung.¶Results: Noise levels were highest for the SensorMedics and the Babylog (70 dB and 62 dB, respectively). Whereas the SensorMedics increased noise production with amplitude, the Babylog remained at a constant level. The Infant Star (52 dB) and the Stephanie (54 dB) were significantly less noisy at their maximum levels of amplitude (40 mbar and 50 mbar, respectively).¶Conclusion: Most levels recorded were below those measured within an incubator without the use of a ventilator. We conclude that neonatal high-frequency ventilators do not represent a major contribution to noise levels for newborns in neonatal intensive care units (NICUs).
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1434-601X
    Keywords: PACS 25.43.+t Antiproton-induced reactions – 24.60.Dr Statistical compound nucleus reactions – 24.75.+i General properties of fission
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Inclusive neutron energy spectra were measured by time of flight using 1.22 GeV antiprotons from LEAR, CERN, as projectiles and targets from natural Al, Cu, Ag, Ho, Ta, Au, Pb, Bi, U. The sum of two Maxwellian distributions was fitted to the spectra obtained at several forward and backward angles yielding neutron multiplicities Mi and slope or temperature parameters T i for the low-energy (evaporative, i=1) and high-energy (pre-equilibrium,i=2) parts, respectively. M 1 increases with A, proportional to the nuclear volume, and M 2 is growing with A , proportional to the nuclear radius. The T parameters are nearly independent of A. The results are compared with previous multiplicity measurements with a neutron detector, intranuclear cascade calculations and neutron spectra from stopped antiproton annihilation on nuclei. With the measured proton spectra also the ratio of emitted neutrons to protons was determined for Au.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 61 (1967), S. 123-127 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The author reports on the possibility of supplying fractures of the humerus shape, including the fractures below the head of the humerus (subcapital fractures) with rectilinear and stiff Küntscher nails. The spot, where the nail should be driven in, results from the position of the arthrodesis of the shoulder, the spot is situated in the angle between acromion and clavicule, thus back of the collar-bone. Especially the fractures of the humerus in cases of arthrodeses of the shoulder-joint (humeral articulation) are qualified for this procedure.
    Abstract: Résumé L'auteur fait rapport détaillé de la possibilité de traiter les fractures — de la tige de l'humérus, y compris les fractures sous-capitales, avec des clous de Küntscher droits et raides. L'endroit de l'enfoncement s'ensuit de la position de l'arthrodèse de l'épaule, elle est située à l'angle entre l'acromion et la clavicule, donc en arrière de la clavicule. Ce sont en particulier les fractures de l'humérus chez les arthrodèses de l'articulation humérale qui sont aptes à un tel clouage.
    Notes: Zusammenfassung Es wird berichtet über die Möglichkeit, Oberarmschaftbrüche einschließlich der subkapitalen Frakturen mit geraden und starren Küntscher-Nägeln zu versorgen. Die Einschlagstelle ergibt sich aus der Arthrodesenstellung der Schulter, sie liegt im Winkel zwischen Acromion und Clavicula, also dorsal von der Clavicula. Es eignen sich besonders die Oberarmbrüche bei Schultergelenkarthrodesen dafür. Auch Frakturen bei älteren Patienten können in dieser Weise versorgt werden, wobei der Nagel tief eingeschlagen werden sollte unter Verzicht auf eine spätere Entfernung.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 6 (1969), S. 60-69 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Vibration grinding of high-molecular pectic acid results in preparations of nearly constant composition and decreased average molecular weight in dependence of grinding time. By using this favourable procedure it is generally possible to produce standardized pectic acid preparations with better and more reproducible solubility properties. Such preparations are required, e.g., for comparative enzymatic investigations. For evaluating polygalacturonase activity it is proposed to use pectic acid preparations with the following properties: viscosity number [η] (intrinsic viscosity) in the range of 50-100 ml/g, mineral content lower than 1 %, and anhydrogalacturonic acid content in the ash-free dry substance minimum 80 %.
    Notes: Durch Schwingmahlung hochmolekularer Pektinsäure von unterschiedlicher Dauer gelangt man zu Präparaten weitgehend konstanter Zusammensetzung und vermindertem Durchschnitts-Molekulargewicht. Diese vorteilhafte Methode ermöglicht generell die Herstellung von standardisierten Pektinsäurepräparaten mit verbessertem und reproduzierbarem Lösungsverhalten, wie sie beispielsweise als Substrate für vergleichende enzymatische Untersuchungen benötigt werden. In diesem Zusammenhang wird zur Ermittlung der Polygalakturonase-Aktivität empfohlen, Pektinsäurepräparate mit einer Viskositätszahl [η] im Bereich von 50 bis 100 ml/g und einem unter 1% liegenden Aschegehalt sowie mit einem Mindestanteil von 80% Anhydrogalakturonsäure in der aschefreien Trockensubstanz zu verwenden.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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