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  • 1990-1994  (7)
  • 1980-1984  (4)
  • 1975-1979  (4)
  • 1965-1969  (5)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 3344-3353 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A modified version of the classic Wiley–McLaren time-of-flight mass spectrometer (TOFMS) is presented here. Owing to a second-order compensation of the initial position effect, a mass resolution m/δm higher than 2000 is obtained with large ion volumes, of the order of 0.2 cm3 for Na+55 (1265 a.m.u.). Sodium clusters Na+n with n up to 530 ((approximately-equal-to)12200 a.m.u.) are separated. The spectrometer can be used for the analysis of ionized clusters in a mass range from 1 to about 20000 a.m.u. as well as for the measurement of the kinetic energy of molecular fragments after a Coulomb explosion of a molecule. The performance of this spectrometer is demonstrated with sodium clusters and molecules.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 13 (1983), S. 0 
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Allergy skin testing of infants and small children continues to be time-consuming and nerve-wracking. We hoped to have found the solution to these problems by using the multi-test (MT). The latter consists of an applicator with 8 heads, each head consisting of nine plastic needles on which the allergen solution rests. Thus eight allergens can be tested simultaneously. During routine control skin testing we compared MT with our usual method, the prick test (PT), amongst twenty patients. Twenty-seven percent of the skin reactions differed by more than 1 +. When we compared PT results with the previous PT, the correlation of 16% was better despite several years interval between tests, different persons carrying out the tests, and hyposensitization of patients. We adapted the MT system and produced a model, multi-test 2 (MT-2), which consists of eight sterile disposable needles on a stainless steel base. When we compared the MT-2 with PT, only 6% differed by more than 1 +. Thus the MT-2 proves to be a useful alternative to the PT for those children, in whom the PT is too difficult to carry out.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 11 (1981), S. 0 
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The simplified oscillation method was adapted to register nasal resistance because complicated and difficult procedures limited other known rhinomanometric tests. An initial study of thirty-nine subjects compared the effect of different-sized masks, revealing that the smaller the face mask, the smaller the capacitance and the higher the effective resistance. After an initial measurement, a second study group of twenty healthy and twenty pollinosis patients aged from 4 to 40 years underwent nasal provocation with grass pollen extract. Both study groups showed that despite high resistance, reactances were minor. This occurs because the nose acts as an aperture and an aperture has minimal reactances. With increasing concentrations of pollen extract, the nasal resistance of pollinosis subjects increased steadily, whereas the controls showed no change. Passive anterior rhinomanometry was measured for comparison and results contrasted sharply with the oscillation method: prior to provocation, initial values of control and pollinosis groups were already significantly different; after provocation, there was a statistically significant rise in resistance amongst the control as well as the pollinosis subjects. Further, the oscillation method for measuring nasal resistance proved to be simple, effective, and suitable for children.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 273 (1975), S. 401-403 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Total charge exchange cross sections were measured for He++ in He and Ar gas in the energy range from 50 to 540 eV using a single beam apparatus. For He++ in He the measured cross section is in agreement with calculations for symmetric resonant charge exchange. For He++ in Ar the cross section for charge exchange decreases with decreasing energy below 300 eV. The measured cross section suggests the formation of Ar+ ions to be more important at lower energies and the production of Ar++ to be dominant at higher energies.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 317 (1984), S. 139-143 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Single electron capture processes in Ne2+/Ar, Kr collisions were studied by aid of the high-resolution translational spectroscopy. At low collision energies (〈1 keV) the dominant contribution to the Ne+-spectrum arises from Ne2+ ions in the metastable1 S 0-state, although it is the weakest component of the primary Ne2+ beam. Ne2+(3 P) and Ne2+*(1 D) projectiles play no important role due to unfavourable energy defects. Target excitation processes as well as transfer ionisation are considered as a possible explanation for different structures in the measured Ne+ spectra.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 275 (1975), S. 95-101 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Differential charge transfer cross sections for collisions of He+, Ne+ and Ar+ with Kr were measured at collision energies below 500 eV. A remarkable fraction of these collisions (2–30 %) occurs with large momentum transfer and small impact parameters. These close collisions lead to an excitation of the product particles, the measured reaction channels are strongly endothermic. In the system Ar++Kr one reaction channel may be described in terms of a curve crossing.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 281 (1977), S. 21-23 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract For collision energies between 100 and 500 eV the collision induced dissociation of H 3 + colliding with H2, He and Kr gas targets was measured. We obtained total cross sections and angular distributions of the charged collision fragments for the main reaction channels. H 3 + +H2→H++2H2 and H 3 + +H2→H 2 + +H2+H. An analysis of the kinetics yields that the dissociation proceeds via vibrational-rotational excitation of H 3 + by mutually induced dipolmoments.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 111-112 (Jan. 1992), p. 281-290 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 103 (1968), S. 277-284 
    ISSN: 1432-1076
    Keywords: Meningokokkenmeningitis ; Meningokokkensepsis ; Defektzustände
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wurden 200 Kinder im Alter von 2–171/2 Jahren nach einer in den Jahren 1955–1966 abgelaufenen Meningokokkenmeningitis und-sepsis eingehend nachuntersucht. Die Probanden wurden einer ausführlichen klinisch-neurologischen Untersuchung, einer Elektrencephalographie, Echoencephalographie und einem Kramer-Intelligenztest unterzogen. Dabei fanden sich bei 39,5% restlose Heilungen, bei 35% leichte und bei 19,5% schwerere Restschäden. Mit zunehmendem Alter der Kinder verringerten sich die schweren Spätschäden. Die restlichen 6% ließen nicht ausschließen, daß der zentral-nervöse Schaden nicht schon vor der Meningitis bestand bzw. nur eine Verschlimmerung durch die Erkrankung erfuhr. Da es sich um Nachuntersuchungen bei Überlebenden aus zum Teil entfernten Gegenden handelt, liegen keine Zahlen über die Letalität in dieser Zeit vor.
    Notes: Summary 200 children of 2 to 171/2 years of age who have had a meningococcal meningitis or -sepsis in 1955–1966 have been reexamined. The patients were submitted to an extensive neurological examination with electroencephalography and echoencephalography and a Kramer-intelligencetest. 39,5% of the patients were found to be completely cured, 35% had mild, 19,5% had severe residual damage. With increasing age of the children the severe damage lessened. In 6% of the patients a preexistent cerebral damage which was aggravated by the meningitis could not be ruled out. Letality numbers during this time could not be established as the surviving patients came out of distant areas.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    European journal of forest research 85 (1966), S. 129-134 
    ISSN: 1612-4677
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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