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  • Springer  (67)
  • Wiley-Blackwell  (13)
  • Institute of Physics  (6)
  • American Chemical Society (ACS)  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Zum Energiespektrum der isotropen hydromagnetischen Turbulenz (1963)
    Springer
    The European physical journal 174 (1963), S. 314-325 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The physical consequences emerging from a theory stated byKraichnan are considered with regard to isotropic hydromagnetic turbulence. This theory involves the direct-interaction approximation retaining the phase correlation within each triad of Fourier amplitudes. These interactions are suggested to be very important in hydromagnetic turbulence. Hydrodynamic as well as magnetic impulse-response function and time-correlation are unequivocally the same. This result suggests the existence of a universal equilibrium range. Within the inertial range the total energy spectrumE g (k)=E(k)+E m (k) obeys the same law as in hydrodynamic turbulenceE(k). The valueE m (k)≈E(k) corresponds roughly to maximum energy flux through this range. The magnetic energy flux decreases rapidly for eddies with larger wave-numbers within the range of ohmic ≫ viscous dissipation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01378605
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  • 2
    Electronic Resource
    Electronic Resource
    Zur Theorie kraftfreier Magnetfelder (1960)
    Springer
    The European physical journal 159 (1960), S. 194-211 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Force-free magnetic fields are defined by the equation rot $$\mathfrak{H} = \alpha \mathfrak{H}$$ . Making use of a moving Frenet coordinate system $$(\mathfrak{t} = tangential, \mathfrak{n} = normal, \mathfrak{b} = binormal unit vector)$$ we find the following general features of these fields: 1. grad $$\left| \mathfrak{H} \right|$$ is always parallel to the osculating plane of the $$\mathfrak{H}$$ -lines. 2. If the lines of force are rectilinear within a finite region of space, the component of grad $$\left| \mathfrak{H} \right|$$ along $$\left| \mathfrak{H} \right|$$ must be zero for a force-free field with rot . 3. The factor of proportionality $$\alpha = \alpha (\mathfrak{r})$$ and $$\mathfrak{H}$$ can be calculated by means of two equations involving only the direction of $$\left| \mathfrak{H} \right|$$ . For several models of force-free fields the effect of symmetry assumptions on $$\alpha = \alpha (\mathfrak{r})$$ is discussed using special coordinate systems. In the appendix it is pointed out that a particle drift arises in magnetic fields with .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01338347
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  • 3
    Electronic Resource
    Electronic Resource
    Polarisationserscheinungen bei der stufenweisen Anregung der Fluoreszenz von Quecksilberdampf (1929)
    Springer
    The European physical journal 54 (1929), S. 811-818 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Die Fluoreszenz des Quecksilberdampfes bei polarisierter stufenweiser Anregung mit den Linien 2537 und 4047 unter Stickstoffzusatz wird untersucht und die dabei auftretenden Polarisationseffekte und Intensitätsversehiebungen der Fluoreszenzlinien 5461, 4358 und 4047 werden beschrieben und erklärt. Einige wichtige Folgerungen und weitere Untersuchungsmöglichkeiten werden diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01341742
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  • 4
    Electronic Resource
    Electronic Resource
    Temperaturmessungen im Wechselstrom-Kohlelichtbogen (1933)
    Springer
    The European physical journal 81 (1933), S. 539-542 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Die Methode von Frl. Kohn, mit Hilfe der Spektrallinienuinkehr die Temperatur eines Gasvolumens zu bestimmen, wird auf den Lichtbogen angewandt und es wird mit ihr die Temperatur des Wechselstromlichtbogens im Spannungs-Nulldurchgang gemessen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01342300
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  • 5
    Electronic Resource
    Electronic Resource
    Subchronic treatment with sodium 2,3-dimercaptopropane-1-sulfonate in methylmercury poisoning (1982)
    Springer
    Bulletin of environmental contamination and toxicology 29 (1982), S. 416-421 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01605605
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  • 6
    Electronic Resource
    Electronic Resource
    De economische politiek van Duitschland (1882)
    Springer
    De economist 31 (1882), S. 49-56 
    Details
    ISSN: 1572-9982
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02218335
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  • 7
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Ahornsirupkrankheit an zwei Familien (1964)
    Springer
    Human genetics 〈Berlin〉 1 (1964), S. 163-169 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00389634
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  • 8
    Electronic Resource
    Electronic Resource
    Separation of the reaction products of cyanazine and terbuthylazine nitrosation by thin-layer chromatography (1998)
    Springer
    Fresenius' journal of analytical chemistry 360 (1998), S. 679-682 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract N-Nitroso-triazine herbicide species were synthesized as reference standards and their reaction products were separated by TLC. The method was established for analytical as well as for preparative amounts to achieve a sufficient separation between the educts, the byproducts and the N-nitrosated moieties. Separation of the reaction mixture was performed by two-dimensional TLC, using different mobile phases for each dimension. In the second dimension two developments were executed using the same solvent mixture. To examine the quality of performance, the separation zones were scrapped off, extracted and analyzed in the HPLC-diode array detection (DAD) mode in comparison with standards of the educts and the products of their N-nitrosation. This method minimizes the contact with the resulting N-nitroso compounds. At present nothing is known about the toxicological relevance or risk assessment on human health of N-nitrosocyanazine or N-nitrosoterbuthylazine species. Therefore the practical handling of these putative mutagenic and carcinogenic substances should be seen under the aspect of precaution and prevention of contamination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160050780
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  • 9
    Electronic Resource
    Electronic Resource
    Gold electrodes from recordable CDs for mercury quantification by flow injection analysis (2000)
    Springer
    Fresenius' journal of analytical chemistry 366 (2000), S. 444-448 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The development of a new methodology for the construction of very efficient flow cells for mercury detection by potentiometric stripping analysis, employing the thin gold layer of recordable CDs as working ¶electrode is reported. This new source of electrodes (CDtrodes) show very attractive performance, similar to that obtained with commercial gold electrodes, with superior versatility. The low cost of this new source of “gold electrodes” allows a frequent replacement of the electrode, avoiding cumbersome clean-up treatments. Various experimental parameters have been optimized to yield low detection limits (0.25 ng/mL of mercury for 5 min deposition at 0.3 V) and good precision (standard deviation of 1.9% was obtained for 15 repetitive measurements using 10 ng/mL of mercury). Standard curves were found to be linear over the range of 0.5–100 μg L–1 of mercury. The flow cells developed were used for the quantification of mercury in oceanic and tap water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160050090
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  • 10
    Electronic Resource
    Electronic Resource
    Induction of drug metabolism in man after rifampicin treatment measured by increased hexobarbital and tolbutamide clearance (1975)
    Springer
    European journal of clinical pharmacology 9 (1975), S. 219-227 
    Details
    ISSN: 1432-1041
    Keywords: Rifampicin ; induction of drug metabolism ; hexobarbital kinetics ; tolbutamide kinetics ; plasma concentrations ; man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Five healthy volunteers took 1.2 g rifampicin daily for 8 days, and before and afterwards each received hexobarbital (7.32 mg/kg) and tolbutamide (20 mg/kg) by i.v. infusion on two consecutive days. The plasma concentrations of the two drugs were determined during and after infusion. The average elimination half-life of hexobarbital had decreased from 325 to 122 min and of tolbutamide from 418 to 183 min following rifampicin treatment. It was calculated that the metabolic clearance of hexobarbital had increased about three-fold and that of tolbutamide more than two-fold. Significant changes in the distribution kinetics of the two drugs were not observed. The results suggest that rifampicin is capable of inducing drug metabolism in man, which leads to an increased rate of elimination of drugs that undergo biotransformation in the liver.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00614021
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