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  • 1
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @British journal for the history of science 8 (1975), S. 255-256 
    ISSN: 0007-0874
    Source: Cambridge Journals Digital Archives
    Topics: History , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 26 (1977), S. 233-237 
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A refined experimental technique is applied to measure the flux-flow resistance of the strong coupling alloys Pb0.9In0.1, Pb0.8In0.2 and Pb0.7In0.3 and to get the deviations from weak coupling theories. In order to test a theory by Imai devised for arbitrary coupling strengths static quantities entering the flux-flow resistance formulas are calculated using extrapolated tunnel spectra.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 291 (1979), S. 5-9 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using singly or doubly reflected 270keV-ions from a Cu-surface at grazing incidence nuclear polarizations in7Li ofP I=(6.8±0.6) % orP I= (11.5±1.0) % and in14N ofP I =(14.8±1.0) % orP I=(20.0±1.0) % respectively, have been achieved.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 273 (1975), S. 167-175 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A phase-free accelerating stage for charged particles has been constructed which makes use of electric ac-fields in a triangular shaped electrode system combined with ac-deflecting devices in the MHz-range. An elaborate calculation of the energy gain based on a time dependent Hamiltonian and a simplified calculation assuming perfect shielding within the electrodes were performed. The theoretical results are compared with measurements at a frequency of 13.55 MHz and at peak electrode voltages of 3 kV and 0.5 kV. The maximum energy gain of electrons with an incident energy of 20 keV was measured to be 140 eV at the 3 kV peak voltage. Construction and properties of the retarding-field energy analyzer and of the resonant circuits are given. It is shown that rf-driven magnetic deflecting coils diminish the energy gain due to induced electric fields. Rf-electric capacitor fields seem to be superior to the rf-magnetic fields because they reduce the energy gain very little and furthermore offer a simultaneous phase-free particle acceleration in opposite directions. The possible applications of such a phase-free accelerating stage for heating up a plasma and for producing an intense ring of relativistic electrons are discussed.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 285 (1978), S. 3-6 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In contrast to other atomic systems, foil excited hydrogen or hydrogen-like atoms show a negative alignment for various energy ranges. We suggest that this particular behaviour results from the degeneracy of differentL states in hydrogenic systems and an observable influence of a surface electric field modifying the initial alignment via Stark effect.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 57 (1978), S. 63-69 
    ISSN: 1432-2072
    Keywords: Twins ; Behavior genetics ; DBH ; COMT ; MAO
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In a sample of 48 healthy adult male twin pairs (24 MZ, 24 DZ) the activities of DBH (serum), COMT (red blood cells), and MAO (platelets) were determined. The twins had undergone a detailed psychodiagnostic test procedure before. Interindividual variability of enzyme activities is almost exclusively genetically determined. No correlation between enzyme activities within one subject is found. Correlations between enzyme activities and MMPI test scores were calculated. As in a comparable investigation by Murphy et al. (1977), negative correlations between MAO activity and MMPI scores prevailed.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 10 (1976), S. 269-273 
    ISSN: 1432-0630
    Keywords: 52
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Intense electron beams extracted from DUOPLASMATRON-plasma cathodes show a high degree of modulation in intensity and an abnormally large energy spread; these facts cannot be explained simply by the temperature of the plasma electrons and the discharge structure. However, an analysis of the discharge stability behaviour and the interaction of source- and extracted beam-plasma leads to an explanation for the observed effects.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 224 (1977), S. 213-220 
    ISSN: 1433-8491
    Keywords: Word deafness ; Auditory agnosia ; ERA-results ; Bitemporal lesions ; Worttaubheit ; Auditive Agnosie ; ERA-Befunde ; Bitemporale Läsionen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Ein Mann erlitt mit 42 Jahren einen linksseitigen ischämischen Hirninsult mit vorübergehender Aphasie. Mit 49 Jahren erkrankte er durch eine rechtsseitige Infarzierung, die nun eine dauernde Unfähigkeit zum Verstehen gesprochener Sprache und zum Erkennen von Tönen oder Geräuschen hervorrief. Einfache alternative Unterscheidungen zwischen den Reizqualitäten reiner Töne konnte er noch treffen. ERA-Befunde zeigten, daß die zentralen Hörbahnen des Hirnstamms intakt waren. Diese Rindentaubheit im Gefolge bilateraler Läsionen des akustischen Cortex und angrenzender corticaler Zentren führt zu der Annahme, das auditive Erkennen sei beim Menschen beiderseits in den temporoparietalen Regionen repräsentiert.
    Notes: Summary At the age of 42 Lothar H. suffered a left-sided ischaemic brain lesion with transient aphasia, followed at the age of 49 by a right-sided ischemic infarction, which caused a continuous inability to understand spoken language and to identify tones and noises. He was still able to discriminate between single qualities of pure tones. The ERA-results showed the central acoustic pathways of the brain-stem to be intact. The occurrence of cortical deafness following bilateral lesions of the acoustic cortex and adjoining cortical centres supports the view that human auditory recognition is represented in both temporoparietal areas.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1871-4528
    Keywords: Chemotherapie ; Ertragsstabilisierung ; Virustherapie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary Studies have been made to determine whether the use of 2.4-dioxohexahydrotriazine (DHT), a newly developed antiphytoviral compound with satisfactory virostatic activity and a favourable chemotherapeutic index (Schuster et al., 1979a, b) can reduce or prevent viral depression of the yield of ware potatoes. Between 1973 and 1977 a total of 106 plot tests were made, using a block design with four replicates. In addition, between 1975 and 1977, 44 large-scale field trials were carried out, the area treated in most of these being 20 ha. In every case, yields from plants treated with DHT five times at intervals of fourteen days were compared with those from untreated control plants. Seed stocks used for the plot tests were classified on the basis of eye excision tests as ‘healthy’ (virus infection less than 10%, average 4.8%) or ‘virus-infected’ (infection greater than 10%, average 24.6%). In the case of 57 ‘virus-infected’ stocks, DHT treatment resulted in a highly significant increase in yield—on average 1.1 t/ha=6.5% (Table 1). On the other hand, treatment with DHT had no material effect on the yield from 49 ‘healthy’ stocks. This indicates that the increase in yield resulted from the antiviral activity of DHT. In the 44 large-scale field trials, carried out in ware crops in which the level of virus infection was generally between 10% and 30%, a highly significant increase in yield was obtained — on average 1.4 t/ha=8%. Included in the data, however, are minor increases in yield recorded in the trials carried out in 1976 (an unusually hot, dry year) in areas badly affected by drought. If these are ignored, a highly significant average increase in yield of 1.9 t/ha=9.7% is obtained when the results of the plot and field trials are combined (Table 1). It is evident from these results that a considerable increase in yield may be obtained through the use of DHT to stabilize yields from virus infected seed stocks. This antiviral preparation has the added advantage of being non-toxic and very economical in use.
    Abstract: Résumé Des études ont été effectuées afin de connaître dans quelle mesure la 2,4-dioxohexahydrotriazine (DHT), substance antiphytovirale nouvellement développée, permet de réduire ou d'éviter les chutes de rendement dans les cultures de pommes de terre de consommation. Ce produit ralentit considérablement, et de manière durable la reproduction du PVX ainsi que celle d'autres virus (Schuster et al., 1979a, b). Au cours des années 1973 à 1977, 106 parcelles disposées en blocs avec 4 répétitions ont été testées. D'autre part, de 1975 à 1977, 44 essais en grande culture couvrant une surface de 20 ha ont été effectués. Dans tous les cas, les surfaces traitées 5 fois à la DHT, à des intervalles de 14 jours, ont été comparées avec des parcelles non traitées. Lors de la récolte des parcelles, il a été prélevé un tubercule par plante pour un postcontrôle virologique. Suivant les résultats du test, les plants ont été classés selon leur taux de contamination par les virus. Pour les lots présentant un taux de contamination de moins de 10% au départ, le taux de contamination moyen fut de 4.8%. Les lots contaminés à plus de 10% présentèrent une attaque moyenne de 24%. Dans les lots contaminés par le virus, la DHT cut pour effet une augmentation hautement significative du rendement, soit 1,1 t/ha (=6,5%, tableau 1). En revanche, par le traitement de 49 parcelles saines, les rendements n'ont pas été influencés par la DHT. Par conséquent, l'augmentation du rendement mentionnée peut être attribuée à l'action anti-virale de la DHT. Sur 44 essais de pommes de terre de consommation en grande culture où la proportion de plantes contaminées atteignait 10–30%, une augmentation hautement significative de rendement a été obtenue, 1,4 t/ha (8.0%). Ces chiffres comprennent également les résultats des essais 1976, année chaude et séche dans certaines régions. En excluant les résultats de 1976, on obtient par les traitements sur les essais parcellaires, une augmentation de récolte hautement significative, soit 1,9 t/ha (=9.0%), et 11,3% pour les traitements en grande culture (tableau 1). Ces résultats démontrent que par le traitement avec la préparation anti-virale DHT, une augmentation non négligeable de rendement peut être obtenue sur des cultures contaminées par le virus, les frais étant économiquement acceptables.
    Notes: Zusammenfassung In mehrjährigen Parzellenversuchen wurde durch Behandlung mit 2,4-Dioxohexahydrotriazin (DHT), einer neu entwickelten antiphytoviralen Substanz im Durchschnitt von 57 stärker virusinfizierten Herkünften (durchschnittlicher Virusbesatz 24.6%) der Ertrag hochsignifikant um 1.1 t/ha (=6.5%) erhöht. Bei 49 gesunden Herkünften (durchschnittlicher Virusbesatz 4.8%) wurden demgegenüber die Erträge nicht verändert. Demnach darf die angeführte Ertragserhöhung der antiviralen Wirkung des DHT zugeschrieben werden. In 44 Grossflächenversuchen in Konsumkartoffelbeständen (Virusbesatz etwa zwischen 10 und 30%), wurde der Ertrag hochsignifikant um 1.4 t/ha (=8.0%) erhöht. Werden die im trocken-heissen Jahr 1976 in ausgesprochenen Dürregebieten erhaltenen Ergebnisse eliminiert, ergeben sich in den Parzellenversuchen mit virusinfizierten Herkünften hochsignifikante Mehrerträge von 1.9 t/ha (=9.7%) und bei den Grossflächenversuchen von 2.3 t/ha (=12.6%).
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 5 (1977), S. 403-430 
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Hyperfine structure (hfs) quantum beats of14NII ground terms are observed for the first time after ion beam surface interaction at grazing incidence (IBSIGI). After demonstrating the feasibility of quantum beat measurements of terms (14NII 2p3p3D) directly excited by IBSIGI the transient transfer of orientation to the nucleus after IBSIGI via hyperfine interaction is observed by measuring the circular polarization behind an additional carbon foil positioned perpendicular with respect to the beam axis. The resulting beat-structure is compared with a simulation based on a theoretical description given in this paper and is essentially ascribed to the hfs of the14NII 2s22p2 3P ground state. The applicability of this new method for measuring ionic ground term hfs splittings and some consequences for the interpretation of the IBSIGI interaction are discussed.
    Type of Medium: Electronic Resource
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