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  • Articles  (77)
  • 1970-1974  (50)
  • 1960-1964  (20)
  • 1955-1959
  • 1945-1949  (2)
  • 1935-1939  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 75 (1971), S. 2908-2914 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 75 (1971), S. 2986-2990 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 59 (1937), S. 2009-2010 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
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  • 4
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    Unknown
    Wiesbaden : Periodicals Archive Online (PAO)
    Geographische Zeitschrift. 45:7 (1939) 276 
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 243 (1971), S. 154-165 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The generalized Veneziano Model has been applied by Chanet al. to the processes (K¯KΠN¯N) with very impressive results, but in this treatment baryon spin was neglected. In this work we give a covariant spin and isospin decomposition of the above class of processes. Postulating factorization at the lowest meson and baryon poles and using the very stringent duality diagram prescription we are led to a Veneziano type ansatz for the various invariant amplitudes.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 58 (1971), S. 96-96 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 19 (1970), S. 407-438 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Summary For examining the variations of the size distribution in aerosols a recording photoelectrical nucleus counter with three variable expansion degrees has been developed. It is absolutely calibrated by simultaneously photographing the fog droplets in the expansion tube and measuring the extinction. This method gives a secure calibration for every expansion ratio. The recorded concentrations are essentially higher than the values determined with the counter of Scholz, with which a calibration was made by comparison in the usual manner. In contradiction to the statements in other papers a satisfying dissolution into components can be obtained for aerosols which are not too concentrated only be very weak expansions through narrow nozzles. Instead of using the uncertain calculated supersaturation ratios the efficacy of the expansion ratios in dry resp. moist air is determined from direct measurements of the temperature decreases. With the assumption of wettable particles the supersaturation spectra obtained in this way can be transformed into size spectra. These spectra show the variations of the size distribution. The new nucleus counter functions unobjectionably and gives values which are always controlable and without subjective influences.
    Abstract: Résumé Pour des recherches sur les variations de la distribution de la grandeur des aérosols un compteur de noyaux photoélectrique enregistrant avec trois degrés d'expansion a été développé. Son étalonnage a lieu absoluement en photographiant les goutteletes de brouillard dans le tuyau d'expansion sous détermination simultanée de l'extinction. Cette méthode fournit un étalonnage sûr pour chaque degré d'expansion. Les concentrations des noyaux enregistrés sont essentiellement plus hautes que les valeurs du compteur de Scholz, avec lequel un étalonnage de comparaison a été fait de la manière usuelle. Au contraire des résultats publiés dans d'autres publications une décomposition satisfaisante en composantes des aérosols pas trop concentrés peut être obtenue seulement avec des expansions très faibles par des tuyères étroites. Au lieu des valeurs incertaines de sursaturation calculées le rendement des degrés d'expansion pour de l'air sec ou humide est determiné par des mesures directes, des abaissements de la température. Les spectres de sursaturation obtenus peuvent être transformés sour la supposition de particules mouillables, à des distributions de grandeur et laissent reconnaitre les variations des dernières. Le nouveau compteur de noyaux fonctionne irrécusablement et donne des valeurs toujours contrôlables et sans influences subjectives.
    Notes: Zusammenfassung Zu Untersuchungen über die Änderungen der Größenverteilung in Aerosolen wurde ein registrierender fotoelektrischer Kernzähler mit drei variablen Expansionsstufen entwickelt. Seine Eichung erfolgt absolut durch Fotografieren der Nebeltröpfchen im Expansionsrohr bei gleichzeitiger Bestimmung der Extinktion. Diese Methode liefert für jeden Expansionsgrad eine sichere Eichung. Die registrierten Kernkonzentrationen sind wesentlich höher als die Werte beim Scholzschen Kernzähler, mit welchem in der üblichen Weise eine Vergleichseichung vorgenommen wurde. Im Gegensatz zu den in der Literatur veröffentlichten Befunden kann eine befriedigende Komponentenzerlegung bei nicht zu dichten Außenluftaerosolen erst mit sehr schwachen Expansionen durch enge Düsen erzielt werden. Anstelle der unsicheren berechneten, Übersättigungswerte wird der Wirkungsgrad der Expansionsstufen in trockener bzw. feuchter Luft aus direkten Messungen der Temperaturabsenkungen bestimmt. Die so erhaltenen Übersättigungsspektren können unter der Annahme benetzbarer Teilchen befriedigend in Größenverteilungen umgesetzt werden und lassen Änderungen der letzteren deutlich erkennen. Der neue Kernzähler arbeitet einwandfrei und liefert stets kontrollierbare, von subjektiven Einflüssen freie Werte.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 20 (1971), S. 13-34 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Summary The course of temperature during the expansion is measured; by this it is demonstrated in which manner differences between the construction and operation of condensation nuclei counters affect the process of expansion and the degrees of supersaturation reached and falsify the informations about nucleus concentration.
    Abstract: Résumé En mesurant le cours de la température pendant l'expansion on peut constater comment des différences entre la construction et le fonctionnement des compteurs de noyaux de condensation affectent le procès d'expansion et les degrées de sursaturation atteints et comment ils falsifient les informations sur la concentration en noyaux de condensation.
    Notes: Zusammenfassung Durch Messung des Temperaturverlaufs während der Expansion kann festgestellt werden, wie sich Unterschiede in der Konstruktion und der Arbeitsweise bei Kondensationskernzählern auf den Expansionsvorgang und die dabei erzielten Wasserdampfübersättigungen auswirken und die Kernkonzentrationsangaben verfälschen.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 1040-1040 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE only objects seen on a 200-in. plate near the positions of the components of the radio source 3(7 273 reported by Hazard, Mackey and Shimmins in the preceding article are a star of about thirteenth magnitude and a faint wisp or jet. The jet has a width of 1*2* and extends away from the ...
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 242 (1973), S. 109-109 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] HOYLE'S assertion that only 5 sources per steradian are missing at the bright end1 is based on the apparent Euclidean nature of the source counts. My derivation of the steady-state source counts2 expected if radio galaxies have cosmological redshifts shows that the Euclidean slope of ...
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