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  • Springer  (77)
  • American Geophysical Union (AGU)
  • American Meteorological Society (AMS)
  • 2010-2014  (43)
  • 1970-1974  (22)
  • 1950-1954  (4)
  • 1940-1944  (8)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 232 (1970), S. 462-472 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Absorbing different lines of acw-argon ion laser or a He-Ne-laser the alkali molecules Na2, K2, Rb2 and Cs2 can be pumped into different rotational-vibrational levels of an excited electronic state. The lifetimes of these states have been measured using the phase shift technique at a modulation frequency of 18 Mc/sec. Because of collisions with the always present alkali atoms the excited molecules may undergo collision-induced transitions to other states and their lifetimes are dependent on the atomic pressure. This dependence was measured and the spontaneous lifetimes were obtained by extrapolation against zero pressure. Different collision processes are discussed which compete with the unperturbed fluorescence.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 270 (1974), S. 93-95 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The 90° photoproton spectrum from12C has been measured with good energy resolution using bremsstrahlung with maximum energyEγ=31 MeV. A fragmentation of the giant dipole resonance in fine structures with a typical width of 150 to 300 keV is observed.
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  • 3
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé Si le taux sanguin en hémoglobine libre dépasse les 50 mg/100 ml, l'excrétion rénale de la bilirubine est fortement augmentée chez le chien, tandis qu'elle reste faible chez la chienne. Les mêmes résultats sont obtenues par perfusion de reins isolés avec du sang hépariné ou défibriné.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 30 (1942), S. 128-136 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary (L) We have completed different points of our former paper on the micro-determination of very small quantities of Hg, and especially for the analyses of pure HgCl2 solutions, and the case when Hg is present in the laboratory atmosphere. It is added: That the excess of chlorine is eliminated by hydroxylamine instead of by heating. Electrolysis can be carried out even if the HCl concentration or the volume of the electrolyte (up to 100 ccm.) is great. If one keeps to the known precautions in the distillatio nof Hg, the determination of the smallest quantities of Hg, below 0,1γ, can be done with sufficient accuracy even without cooling the receptor by liquid air. The determination of Hg in the reagents HCl, KClO3 and hydroxylamine hydrochloride is given. The lately issued paper ofReith andvan Dijk on a microanalytical determination of Hg with dithizon is discussed.
    Abstract: Résumé (W) Nous complétons les prescriptions que nous avons déjà données pour le microdosage de très petites quantités de mercure; et ceci pour diverses raisons, notamment dans le cas d'analyses de solution de HgCl2 pur, ou d'analyses conduites dans une atmosphère contenant de la vapeur de mercure. Il faut relever les faits suivants: l'excès de chlore n'est plus éliminé par chauffage, mais au moyen d'hydroxylamine. L'électrolyse peut être conduite sans inconvénient en présence d'une importante quantité d'HCl et dans un volume plus considérable de l'électrolyte (jusqu'à 100 cmc.). En observant certaines précautions, lors de la distillation du mercure, on parvient à doser avec assez d'exactitude de très petites quantités de mercure, inférieures à 0,1γ, et cela sans refroidir le récipient avec de l'air liquide. On donne un procédé simple de détermination du mercure dans les réactifs nécessaires, HCl, KClO3 et chlorhydrate d'hydroxylamine. Il est fait mention d'un récent article deReith etvan Dijk sur un microdosage du mercure au moyen de la dithizone.
    Notes: Zusammenfassung Unsere früheren Vorschriften für die mikrometrische Bestimmung kleinster Hg-Mengen werden in verschiedener Hinsicht ergänzt, insbesondere für die Analyse reiner HgCl2-Lösungen und für den Fall, daß die Luft im Arbeitsraum Hg-haltig ist. Hier sei hervorgehoben: Das überschüssige Cl wird statt durch Erwärmen mit Hydroxylamin beseitigt. Die Elektrolyse ist auch bei größerem HCl-Gehalt und größerem Volum des Elektrolyten (bis zu 100 ccm) anstandslos durchzuführen. Unter Einhaltung gewisser Vorsichtsmaßregeln beim Abdestillieren des Hg läßt sich die Bestimmung der kleinsten Hg-Mengen, unter 0,1γ, auch ohne Kühlen der Vorlage mit flüssiger Luft genügend genau vornehmen. Es werden einfache Verfahren zur Hg-Bestimmung in den benötigten Reagenzien HCl, KClO3 und Hydroxylaminhydrochlorid angegeben. Die kürzlich erschienene Arbeit vonReith undvan Dijk über eine mikroanalytische Bestimmung des Hg mit Dithizon wird besprochen.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 41 (1953), S. 89-118 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es werden etwa 70 mikrochemische und andere Apparate beschrieben, die in den vergangenen 10 Jahren entwickelt wurden. Es handelt sich hierbei um Geräte zum Rühren u. dgl., Einrichtungen für die anorganische qualitative Analyse, Apparate für organische Zwecke, für elektrochemische und volumetrische Verfahren und für verschiedene andere Bedürfnisse.
    Abstract: Résumé On décrit environ 70 articles relatifs à l'appareillage microchimique et général mis au point pendant les 10 dernières années. L'appareillage est classé en 6 sections, c'est-à-dire, dispositifs pour l'agitation et ce qui s'y rapporte, pour l'analyse qualitative minérale, l'appareillage organique, les techniques électrochimiques, l'appareillage pour Volumétrie et des dispositifs variés.
    Notes: Summary About 70 pieces of microchemical and general apparatus developed during the past 10 years are described. The apparatus is classified in 6 sections, viz. stirring and allied devices, equipment for inorganic qualitative analysis, organic apparatus, electrochemical techniques, volumetric apparatus, and miscellaneous devices.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 5 (1954), S. 168-172 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Zusammenfassung Für eine programmgesteuerte Rechenmaschine mit einer magnetischen Trommel als Speicher wird ein für den allgemeinen Gebrauch geeignetes Verzeichnis der arithmetischen Befehle gegeben und der logische Aufbau des Rechenwerks beschrieben. Vorgesehen ist das Rechnen sowohl mit gleitendem Komma (Zahlen der Forma·10 b ) als mit festem Komma, was das automatische Berechnen von Rechenplänen sowie das Rechnen mit verdoppelter Stellenzahl gestattet.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 26 (1970), S. 128-129 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Purin-Basen, Kaffein und Cortison führen zu einer Vermehrung der Fettsäuren im Rattenserum. Adenin vermindert im Gegensatz zu den anderen Purinen die Lipolyse.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 29 (1973), S. 410-411 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé L'hémoglobine libre du sang, filtrée par les glomérules rénaux et partiellement absorbée par les tubules, est métabolisée par le tissu renal. A l'aide de l'hémoglobine marquée en14C, formée à partir de la glycine-2-14C et de la glycine-1-14C nos résultats prouvent que chez le chien mâle les reins métabolisent l'hémoglobine en bilirubine conjugée et excrètent cette dernière dans les urines.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Chromosoma 43 (1973), S. 211-224 
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The diploid number of the Rhesus macaque, Macaca mulatta, is 42. All chromosomes are biarmed and all constitutive heterochromatins are centromeric. The diploid number of the African Green monkey, Cercopithecus aethiops, is 60. Again all chromosomes are biarmed, but seven pairs possess very short second arms which are heterochromatic. The heterochromatins of remaining chromosomes are centromeric. Using G-banding and deleting the heterochromatic short arms, the chromosomes of the African Green monkey can be artificially fused to reconstruct a karyotype of the Rhesus with only one pair of unmatched small metacentrics. In addition to the Robertsonian type of translocations, several sets of centromere-telomere translocations were found. The latter type of translocation reduced three arms into two. Thus the fundamental number can be changed by two mechanisms: growing extra heterochromatic arms and the centromere-telomere fusions.
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 96 (1974), S. 281-289 
    ISSN: 1432-072X
    Keywords: Fungal Nuclei ; Isolation ; Purification ; Characterization ; Dermatophyte ; Microsporum gypseum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A method is reported for the isolation of nuclei from the dermatophytic fungus,Microsporum gypseum. The yield ranged from greater than 90% in crude preparations to less than 20% in highly purified preparations as judged by the recovery of DNA. Nuclei isolated in this manner appeared intact in electron microscopic observations and possessed chemical compositions, i.e. low protein/DNA and RNA/DNA ratios, which indicated a low degree of cytoplasmic contamination.
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