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  • 21
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    International Journal of Mass Spectrometry and Ion Processes 85 (1988), S. R1-R5 
    ISSN: 0168-1176
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 22
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    International Journal of Mass Spectrometry and Ion Processes 68 (1986), S. 341-346 
    ISSN: 0168-1176
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 23
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    International Journal of Mass Spectrometry and Ion Processes 83 (1988), S. R1-R5 
    ISSN: 0168-1176
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 24
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    International Journal of Mass Spectrometry and Ion Processes 74 (1986), S. 281-301 
    ISSN: 0168-1176
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 25
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Instruments and Methods 147 (1977), S. 139-140 
    ISSN: 0029-554X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
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  • 26
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 198 (1970), S. 256-279 
    ISSN: 1432-1459
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Unter den bisher erschienenen Mitteilungen über cerebrale Anfälle als besonderes Symptom der Multiplen Sklerose (MS) werden 70 Kasuistiken ausgewertet, bei denen der Zusammenhang gesichert erschien. 19 eigene Beobachtungen aus einer Zahl von insgesamt mehr als 4000 Patienten mit MS werden dieser Gruppe gegenübergestellt. Es ergibt sich, daß nach dem klinischen Anfallstyp in 40% primär generalisierte, gewöhnlich tonisch-klonisch ablaufende Iktus vorkommen. Unter den übrigen Anfallstypen (60%), die durch Herderscheinungen eingeleitet werden oder herdförmig bleiben, überwiegen die mit rein motorischen Erscheinungen. In diesen Fällen kann ein Herd in oder nahe der Präzentralregion vermutet werden. Sie machen einen Anteil von 25% am Gesamtmaterial aus. Die Zuordnung der epileptogenen Herde zu den verschiedenen Hirnabschnitten an Hand des vorliegenden MS-Materials spiegelt in der Häufigkeitsverteilung weitgehend die bekannte Disposition der Rindenareale zur Ausbildung epileptogener Foci wider. Die Gesamthäufigkeit cerebraler Anfälle bei der MS liegt nach den Mitteilungen der Literatur zwischen 1 und 6%. Berechnungen am eigenen Krankengut der Würzburger wie der Göttinger Neurologischen Universitätskliniken nach kritischer Sichtung und Ausscheidung aller nicht gesicherten oder wahrscheinlich zu machenden Fälle ergaben jedoch nur 0,5–0,6%. Beide Umstände zeigen, daß sich die MS wohl nicht im Sinne einer spezifischen epileptogenen Noxe auswirkt. Die Frage nach der Lage der epileptogenen Läsionen in Beziehung zu corticalen Strukturen wird diskutiert. Abschließend wird kurz auf die EEG-Befunde eingegangen.
    Notes: Summary From the communications hitherto reported on cerebral attacks as a particular feature of multiple sclerosis (MS) 70 case histories with an apparently proven relationship were evaluated. The observations in 19 own cases from a total number of 4000 patients with MS are compared to this group. It was found that according to the clinical type of seizure primarily generalized usually tonic-clonic attacks occurred in 40%. Among the other types of seizures (60%) which begin with focal symptoms or remain localized, those with strictly motor symptoms prevail. A focus within or near the precentral region may be presumed to exist in these cases. They comprise 25% of the entire group. The association of the epileptogenic foci with the various brain areas as illustrated by the present cases of MS and the frequency distribution reflect to a large measure the well known predisposition of cortical areas to form epileptogenic foci. The total incidence of cerebral attacks in MS varies between 1 and 6% according to the literature. Computations based on the patients of our own seen at the neurological departments of the universities of Würzburg and Göttingen yielded 0.5 to 0.6% only after all cases were critically reviewed and rejected if not or only partially fufilling our criteria. Both of these observations demonstrate that MS might not act in terms of a specific epileptogenic noxa. The localization of epileptogenic lesions in relation to cortical structures is discussed. In conclusion, EEG findings are briefly mentioned.
    Type of Medium: Electronic Resource
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  • 27
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 4 (1972), S. 479-482 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A simple method is described for use with the differential scanning calorimeter for baseline interpolation in continual processes over a wide temperature interval. For the process of water desorption from the synthetic zeolite LiA with the coveragegq=1.5, the measured heat of desorption wasQ=11.2±0.5 kcal/mole.
    Type of Medium: Electronic Resource
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  • 28
    Electronic Resource
    Electronic Resource
    Springer
    Czechoslovak journal of physics 48 (1998), S. 1135-1145 
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The 4.4eV dissociative electron attachment peak in CO2 was reinvestigated paying particular attention to (i) its structure associated with vibrational excitation and to (ii) the temperature dependence of the onset. For this purpose we have used two specially designed crossed beams machines, one having a trochoidal electron analyzer (TEM) and one with a hemispherical electron analyzer (HEM) for the production of the highly monochromatized electron beams (with FWHM's down to 5 and 50meV, respectively). The present results confirm the earlier findings in (i) interpreting the dominant structures of the 4.4eV peak as being due to vibrationally excited states of CO in the reaction CO2 + e → O-+ CO and (ii) assigning the much weaker and narrower structures to the intermediate CO 2 - . In the temperature range between 300 and 245 K almost no temperature dependence of the onset can be seen in the present study. In comparison to NO and CO where the onset is vertical the CO2 threshold behavior is less steep indicating that in the CO2 case a different type of transition must be responsible for the onset of the O− production. Besides DA to CO2 we have for comparison and calibration purposes investigated also DA to CO and NO.
    Type of Medium: Electronic Resource
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  • 29
    Electronic Resource
    Electronic Resource
    Springer
    Czechoslovak journal of physics 49 (1999), S. 383-392 
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using a recently constructed high resolution crossed electron/molecular beam apparatus consisting of a hemispherical electron monochromator and a quadrupole mass spectrometer we have measured the relative production cross sections for CI– and F– via electron attachment to CF2Cl2. The relative Cl– cross section is placed on an absolute scale by reference to an absolute rate coefficient using a calibration method involving integration of the measured anion signal. The most efficient Cl– production process is at about zero energy and its magnitude is resolution limited. The present high resolution value of 6 × 10−16 cm2 compares well with an earlier value reported by Chen and Chantry. A second peak is detected at around 0.8 eV in accordance with some of the earlier beam and swarm measurements. The observed production of F– has an appearance energy of 1.9 eV and the energy of maximum cross section is 3.36 eV, the latter value comparing well with several previous studies.
    Type of Medium: Electronic Resource
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  • 30
    ISSN: 1434-6079
    Keywords: 33.80.G
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have observed strong photodissociation (using visible laser light) of neutral van der Waals clusters (Ar, N2, O2, CO2, SO2, NH3) produced by supersonic expansion and detected by electron ionization/mass spectrometer. Several tests were performed, all of them supporting this surprising discovery. We suggest that Raman induced photodissociation (RIP) is responsible for this phenomenon. This first observation of Raman induced photodissociation provides a new technique for the study of neutral van der Waals clusters.
    Type of Medium: Electronic Resource
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