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  • 2000-2004  (976)
  • 1935-1939  (37)
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  • 1
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    Conjugate addition of organozinc reagents to enones linked to a tricarbonyl iron diene unit. Asymmetric synthesis of a building block of amphotericin B (2002)
    Elsevier
    Details
    Publication Date: 2002-10-01
    Print ISSN: 0040-4039
    Electronic ISSN: 1873-3581
    Topics: Chemistry and Pharmacology
    Published by Elsevier
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Remarks on the Photochemistry of Polyatomic Molecules. (1937)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 41 (1937), S. 97-107 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150379a009
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Dynamics of periodic ion holes in a forced beam–plasma experiment (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 4271-4274 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Experimental observation of the propagation of periodic ion phase space vortices is reported. Density fluctuation measurements in a double plasma device show an apparently spontaneous acceleration of these periodic structures from ion thermal to ion acoustic velocity. A nonlinear kinetic description explains this as a transition from a new type of nonlinear electrostatic mode (periodic ion holes) to an ion acoustic mode which is caused by trapped particle scattering. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1403395
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  • 4
    Electronic Resource
    Electronic Resource
    Transition from unbounded to bounded plasma whistler wave dispersion (2002)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 9 (2002), S. 3254-3258 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Whistler wave dispersion measurements are done in a linear magnetized helicon plasma experiment. The waves are excited by an induction loop and detected by movable magnetic probes for a frequency range of 100–800 MHz, corresponding to 0.05–0.9 ωce. The dispersion of whistler waves is measured for various plasma densities and magnetic field strengths. A key issue is to study the transition from an unbounded to bounded plasma wave dispersion. A comparison with theoretically derived dispersion relations is made. For small wavelengths, the dispersion can be described with whistler wave theory for unbounded plasmas whereas for larger wavelengths, the bounded geometry must be taken into consideration. The experimental results agree with theoretical dispersion relations derived for the bounded and the unbounded situation. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1494069
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  • 5
    Electronic Resource
    Electronic Resource
    A furnace for the in situ study of the formation of inorganic solids at high temperature using time-resolved energy-dispersive x-ray diffraction (2000)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 4177-4181 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The design, construction, and use of a furnace from which time-resolved x-ray diffraction data may be measured from reacting mixtures of solids or of solids and liquids is described. The furnace is a vertical tube design, constructed from commercially available components, and can operate at temperatures of up to 1000 °C. The apparatus is designed to heat sample tubes of up to 3 cm diameter. The use of high-intensity synchrotron-generated white-beam x rays allows the tube and its contents to be penetrated; thus x-ray diffraction data can be measured from reactions taking place in laboratory-sized reaction vessels. The energy-dispersive diffraction geometry allows rapid data collection (of the order of seconds); hence reactions can be followed continuously in real time. The use of the furnace is demonstrated by results from experiments performed on Station 16.4 of the Daresbury Synchrotron Radiation Source, UK. Two distinct reaction types are studied, both used to prepare the layered perovskite RbCa2Nb3O10: first, a solid state route at 800 °C and second a flux route, performed in molten RbCl, also at 800 °C. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1315355
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  • 6
    Electronic Resource
    Electronic Resource
    Why Do European Firms Issue Convertible Debt? (2004)
    Oxford, UK; Malden, USA : Blackwell Publishing Ltd/Inc.
    European financial management 10 (2004), S. 0 
    Details
    ISSN: 1468-036X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: We survey European managers to gain some insights into motivations of convertible issuance. Our analysis shows that a majority of firms issue convertibles as ‘delayed equity’ and as ‘debt sweetener’. Managers also use convertibles to avoid short-term equity dilution and to signal firm's future growth opportunities. We document a large cross-sectional variation across firms in rationales for issuing convertibles and find mixed support for most theoretical models. Our evidence suggests that the popularity of convertibles is driven primarily by their versatility in adjusting their design to fit the financing needs of individual firms, and by their increased demand among institutional investors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1354-7798.2004.00253.x
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  • 7
    Electronic Resource
    Electronic Resource
    European Managerial Perceptions of the Net Benefits of Foreign Stock Listings (2001)
    Oxford, UK and Boston, USA : Blackwell Publishers Ltd
    European financial management 7 (2001), S. 0 
    Details
    ISSN: 1468-036X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: This study surveys the European managers on the costs, benefits, and net benefits of foreign listing. Increase in prestige and visibility, and growth in shareholders are perceived as the major benefits, and the costs of public relations and legal fees are cited as the major costs by the managers. While a majority of managers (60%) perceive that benefits outweigh the costs of foreign listing, about 30% also view the net benefits to be negative. Perceived net benefits are positively related to the increase in the total trading volume after foreign listing, the financial disclosure levels of the firm, and the dual listing on both the US and European foreign exchanges. Without the influence of these factors, the perceived net benefits are negative.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1468-036X.00153
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  • 8
    Electronic Resource
    Electronic Resource
    Economic Determinants of Multiple Accounting Method Choices in a Swiss Context (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of international financial management & accounting 15 (2004), S. 0 
    Details
    ISSN: 1467-646X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: This article investigates economic determinants that may affect multiple accounting method choices made by Swiss listed companies. It intends to make a contribution to the accounting choice literature for at least four reasons. This is, to our knowledge, the first study to investigate the economic determinants of Swiss accounting method choices. Second, Swiss firms provide an interesting sample for testing accounting method choices because they can choose from a much wider range of accounting methods than their American counterparts. Third, this study examines the balance sheet effect as well as the income statement effect. Lastly, multiple accounting methods are used instead of individual choices. The empirical results exhibit that income-accelerating accounting method choices is positively associated with the recourse to bank and private loans, the extent of assets specificity and the ownership dilution of the firm and negatively with labour force. Additionally, firms that select leverage-ratios decreasing accounting methods, make higher recourse to debt and especially bank loans to finance their activities and exhibit a higher proportion of specific assets than other corporations. Overall, this result suggests that in a Swiss context, managers may select accounting methods to decrease both debt and political costs as well as to increase their own compensation to some extent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-646X.2004.00104.x
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  • 9
    Electronic Resource
    Electronic Resource
    MOLECULAR CONTROL OF CORTICAL DENDRITE DEVELOPMENT (2002)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Neuroscience 25 (2002), S. 127-149 
    Details
    ISSN: 0147-006X
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology , Medicine
    Notes: Abstract Dendritic morphology has a profound impact on neuronal information processing. The overall extent and orientation of dendrites determines the kinds of input a neuron receives. Fine dendritic appendages called spines act as subcellular compartments devoted to processing synaptic information, and the dendritic branching pattern determines the efficacy with which synaptic information is transmitted to the soma. The acquisition of a mature dendritic morphology depends on the coordinated action of a number of different extracellular factors. Here we discuss this evidence in the context of dendritic development in the cerebral cortex. Soon after migrating to the cortical plate, neurons extend an apical dendrite directed toward the pial surface. The oriented growth of the apical dendrite is regulated by Sema3A, which acts as a dendritic chemoattractant. Subsequent dendritic development involves signaling by neurotrophic factors and Notch, which regulate dendritic growth and branching. During postnatal development the formation and stabilization of dendritic spines are regulated in part by patterns of synaptic activity. These observations suggest that extracellular signals play an important role in regulating every aspect of dendritic development and thereby exert a critical influence on cortical connectivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.neuro.25.112701.142932
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  • 10
    Electronic Resource
    Electronic Resource
    Distribution, developmental and stress responses of antioxidant metabolism in Malus (2004)
    Oxford, UK : Blackwell Science Ltd
    Plant, cell & environment 27 (2004), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A comprehensive study was carried out to examine the interactions between the two major hydrophilic antioxidants l-ascorbate (vitamin C, l-AA), and glutathione (γ-glutamyl cysteinylglycine, GSH), and other antioxidant pools in tissues of Malus, to identify factors affecting steady-state cellular concentrations. We show that in Malus, each tissue type has a characteristic and different l-AA/GSH ratio and that in fruit, exocarp (epidermal) tissue acclimated to high light has higher l-AA levels but lower GSH levels than shaded (green) areas. Maturing seeds were characterized by the highest concentrations of GSH and a highly oxidized l-AA pool. It is demonstrated that fruit seeds are capable of l-AA biosynthesis, but that this occurs exclusively by means of the Smirnoff–Wheeler pathway. By contrast, foliar tissue was also able to synthesize l-AA using uronic acid substrates. Unlike the fruit of some other plant species however, the remaining fruit tissues are incapable of de novol-AA biosynthesis. The observed differences in the steady-state concentrations of l-AA and GSH and the capacity to withstand stress in fruit, were also independent of the rates of uptake of photosynthate or of l-AA, but were correlated with the protective effect provided by phenolic compounds in these tissues. During development and maturation, l-AA and GSH levels in apple fruit declined steadily while foliar levels remained essentially constant throughout. However there was no apparent relationship between the free sugar contents of the fruit and antioxidant concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.2004.01238.x
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