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  • Springer  (120)
  • 2005-2009  (36)
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  • 1
    Publication Date: 2008-01-01
    Print ISSN: 1286-4560
    Electronic ISSN: 1297-966X
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Optical and quantum electronics 18 (1986), S. 93-96 
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Astrophysics and space science 127 (1986), S. 265-284 
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Properties of discrete Alfvén wave modes are derived, at frequencies up to the ion-cyclotron frequency, for current-carrying plasma slabs with non-uniform densities. It is shown that the essential features of the dispersion relations can be derived by examining the dominant terms in the ‘potential’ function, when the wave equation is cast in the Schrödinger equation form. Analytical predictions for a class of mass and current density profiles are compared with numerically calculated dispersion relations and wavefields for particular profiles.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of applied electrochemistry 16 (1986), S. 239-249 
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The electrochemical oxidation of thin coats of poly(N-vinylcarbazole) on platinum electrodes has been studied. The oxidation is shown to involve initially the cross-linking of the polymer chains through the oxidation of up to 50% of the carbazole moieties in the coat and the dimerization of the resulting pendant carbazole cation radicals. The resulting dimeric carbazole unit is more easily oxidized than the monomer and undergoes a further (reversible) two-electron oxidation. Theory is presented describing the shape of the current-voltage curves obtained, and this together with current transients obtained from potential-step experiments is used to confirm the mechanism and obtain a rate constant of 6×10−3M−1s−1 for the dimerization of the carbazole cation radicals within the coat.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 37 (1986), S. 597-607 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Résumé Un écoulement tourbillonnaire admettant une surface libre est susceptible de présenter des instabilités du type centrifuge, capillaire et Rayleigh-Taylor. Notre travail étend les critères de stabilité obtenus par Rayleigh et Synge respectivement pour des fluides parfaits et visqueux aux cas des configurations à surface libre.
    Notes: Abstract A swirl flow with a free surface is susceptible to centrifugal, capillary, and Rayleigh-Taylor instabilities. The present work extends the stability criteria of Rayleigh and Synge for inviscid and viscous fluids, respectively, to free-surface configurations.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 37 (1986), S. 651-665 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Zusammenfassung Explizite Lösungen und die Rotation des Geschwindigkeitsfeldes an den Wandoberflächen für Stokes-Strömungen durch ebene und axisymmetrische Kanäle werden angegeben. Der Einfluß einer Senke, — die einen Anteil der Durchströmmenge absorbiert —, in der Kanalwand wird berechnet.
    Notes: Abstract Explicit solutions and corresponding wall vorticities are calculated for Stokes flows in which a fraction of the flux of a plane or axisymmetric duct flow is forced to leave the duct via a wall sink.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 73 (1986), S. 333-334 
    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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  • 8
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Experiments were designed to expose blue mussels (Mytilus edulis) to contaminated sediment collected from Narragansett Bay, Rhode Island, USA in 1982. Measurements were taken to allow comparisons of the uptake and depuration of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs). In addition, concentration factors in the mussels were calculated separately against the dissolved and particulate phase concentrations and the results from the exposure and control systems were compared. Both PAHs and PCBs were rapidly accumulated by the mussels exposed to the contaminated sediment. After the mussels were transferred to control seawater, individual PAHs were depurated with half-lives ranging from 12 to 30 d. Individual PCBs showed depuration half-lives which ranged from 16 to 46 d. Concentration factors in the mussels calculated against the particulate phase concentrations were very different in the exposure and control systems. Concentration factors calculated using only the dissolved phase concentrations (bioconcentration factors) showed excellent agreement in the two systems, possibly an indication that the dissolved phase was the direct source of the contaminants accumulated by the mussels. The bioconcentration factors for PCBs were higher than those of PAHs when compounds with similar n-octanol/water partition coefficients were compared.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Oecologia 69 (1986), S. 407-412 
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The migratory ability of a monophagous insect, Tetraopes tetraophthalmus (Coleoptera: Cerambycidae), was measured in ten populations in each of two regional types. In the first region, a river valley, populations were abundant and close together; in the second regional type, mountainous and peripheral areas, populations were uncommon and far apart. The data revealed that regional variation in migratory behavior occurred along two dimensions. Regions differed not only in the mean migratory ability of individuals (1st dimension) but in the amount of variation between populations (2nd dimension). Whereas river valley populations were found to be uniformly sedentary, mountainous and peripheral populations were found to be heterogeneous, some being very vagile, others being very sedentary. In the mountainous and peripheral areas, small and sparse populations were more vagile than large dense populations. The site to site variation in the mountainous and peripheral areas was due exclusively to females. In these areas, the mean migratory ability of females in a population was positively correlated with mean body size of the females, and inversely correlated with populations density. The data are consistent with the FLY hypothesis for this species (long distance migraters=Females, Large, and Young). Taken together, the geographical patterns support the “founding hypothesis” of migration. According to this theory, the inevitable selection against migration within populations is balanced by periodic extinctions of the populations and the founding of new populations by migrating individuals.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular evolution 23 (1986), S. 41-51 
    ISSN: 1432-1432
    Keywords: RAS oncogene ; Cloning ; DNA sequence ; Yeast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have cloned and determined the complete nucleotide sequence of a RAS gene from the yeastSchizosaccharomyces pombe (SP-RAS). The putative RAS protein of 214 amino acids is encoded by two noncontiguous reading frames separated by an intron of 86 bp. The SP-RAS gene product shares extensive homology with the proteins of theSaccharomyces cerevisiae (SC),Dictyostelium, Drosophila, and human RAS genes in its N-terminal region but not in its C-terminal region. The extended C-terminal regions found in the SC-RAS genes have no counterpart in the SP-RAS gene. Thus the RAS genes of these two yeasts are structurally quite distinct. The SP-RAS sequence was expressed in vivo.
    Type of Medium: Electronic Resource
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