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  • 1
    Digitale Medien
    Digitale Medien
    Beam-energy control during a beam pulse in a neutral beam injection system (1990)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 2614-2622 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: Capability of beam-energy control during a beam pulse has been demonstrated in the JT-60 neutral beam injection system. In addition to the acceleration voltage, the acceleration current and magnetic field separating residual ion beams were simultaneously varied. A preprogram control was adopted to cope with the relatively long time constant of the magnetic field due to the eddy current induced in the magnet core. The overall time constant is about 0.4 s. Beam-energy control was first tested in the prototype injector unit for JT-60 and then applied in JT-60 heating experiments. By advancing the idea demonstrated here, it is possible to design future neutral beam systems with real-time beam-energy control that follows target plasma evolutions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1141847
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  • 2
    Digitale Medien
    Digitale Medien
    Growth of m-Chloronitrobenzene Crystals in the Presence of Tailor-Made Additives: Assignment of the Polar Axes from Morphological Calculations (1994)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 3215-3221 
    Details
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/j100063a027
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  • 3
    Digitale Medien
    Digitale Medien
    Die Regeneration des Knorpelgewebes (1904)
    Springer
    Virchows Archiv 175 (1904), S. 32-45 
    Details
    ISSN: 1432-2307
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01947814
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  • 4
    Digitale Medien
    Digitale Medien
    Über Gewebsveränderungen der künstlich erzeugten Kyphose der Schwanzwirbelsäule des Kaninchens (1904)
    Springer
    Development genes and evolution 18 (1904), S. 253-260 
    Details
    ISSN: 1432-041X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02163656
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  • 5
    Digitale Medien
    Digitale Medien
    Electrochemical characteristics of hydrogen storage alloys modified by electroless nickel coatings (1994)
    Springer
    Journal of applied electrochemistry 24 (1994), S. 808-813 
    Details
    ISSN: 1572-8838
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: Abstract Multicomponent hydrogen storage alloy with the composition MmNi3.31Mn0.37Al0.28CO0.64 (Mm = misch metal consisting of 24.87% La, 52.56% Ce, 5.57% Pr, 16.86% Nd and 0.14% Sm) was used as a negative electrode material. To improve the performance of the negative electrode, the alloy particles were modified with various electroless Ni-P and Ni-B coatings. Electrochemical properties such as discharge capacity and high-rate dischargeability of the negative electrode were generally improved by the surface modifications. However, in the case of a Ni-P (10 wt % P) coating, the discharge capacity and high-rate dischargeability decreased with increasing thickness, due to the low hydrogen permeability and high electric resistivity of the coating. Consequently, both kinds of coating and their thickness are critical factors in determining the performance of such a negative electrode.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00578099
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  • 6
    Digitale Medien
    Digitale Medien
    Variability in Active Galactic Nuclei (1993)
    Springer
    Astrophysics and space science 210 (1993), S. 245-257 
    Details
    ISSN: 1572-946X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract AGN (Active Galactic Nuclei) have their profound time variability over a wide range of time scales. Although many results of AGN variability have been provided from wide band wavelength observations, I would like to concentrate the recent problems concerning a nearby region of their central engine based on the X-ray observations which are most efficient to investigate this region. In this paper we will investigate mainly the result of Seyfert galaxies which would be generalized to other AGN.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00657909
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  • 7
    Digitale Medien
    Digitale Medien
    Generation of broadband squeezed states pumped by CW mode-locked pulses (1992)
    Springer
    Applied physics 55 (1992), S. 233-241 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 42.50.Dv ; 42.50.Lc ; 42.65.Ky
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Broadband high level squeezing was clearly observed from 100 kHz to 80 MHz using crystals Ba2NaNb5O15 of 5 mm length, MgO:LiNbO3 of 19 mm length and KNbO3 of 5.8 mm length. Maximum noise reductions detected on a spectrum analyzer were −1.2 dB (−24%), −1.25 dB (−25%), and −1.8 dB (−34%) for the three crystals, respectively. The maximum squeezing is limited mostly by “optical index damage” of the parametric crystals. A detailed analysis of the beam parameters traced along the pump beam, squeezed vacuum, etc. is given. A detailed discussion on the evaluation of the initial squeezed level is given. A preliminary experiment with compressed laser pulses to avoid the optical damage is also described.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00325011
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  • 8
    Digitale Medien
    Digitale Medien
    Factors affecting the characteristics of the negative electrodes for nickel-hydrogen batteries (1993)
    Springer
    Journal of applied electrochemistry 23 (1993), S. 1051-1055 
    Details
    ISSN: 1572-8838
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: Abstract The multicomponent hydrogen storage alloy with composition MMNi3.31Mn0.37A10.28Co0.64 was used as a negative electrode material. After packing the alloy particles in a porous nickel substrate, press forming was carried out to bond them. The effects of particle size and forming pressure on electrode performance were examined in 6 m KOH solution. The electrochemical properties of the negative electrode, such as discharge capacity and high-rate dischargeability, were remarkably improved by increasing the alloy particle size and forming pressure.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00266128
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  • 9
    Digitale Medien
    Digitale Medien
    Quantitative analysis by thin-layer chromatography with secondary ion mass spectrometry (1991)
    Springer
    Chromatographia 32 (1991), S. 179-181 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Thin-layer chromatography ; Secondary ion mass spectrometry ; Nicergoline ; Semisynthetic alkaloid
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary A direct combination of thin-layer chromatography with secondary ion mass spectrometry (TLC/SIMS) provides a method for the quantitative analysis of thermally unstable compounds or compounds of low volatility such as nicergoline. The method is very simple and has excellent precision. The analysis was performed by using an aluminium TLC plate and a mixture of methylene chloride, acetone, and distilled water as a developing solvent. After development the portion of the plate with the nicergoline and the internal standard spots was cut off the TLC plate, and was attached to the SIMS holder directly. The amount of nicergoline was determined from the ratio of the fragment ion intensity of the nicergoline to the internal standard. The calibration curve was linear, and the detection limit was 10 ng at a signal-to-noise ratio of 5. This method should be considered for application to the determination of drugs in biological samples and also for the determination of possible impurities and decomposition products in drugs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02325023
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  • 10
    Digitale Medien
    Digitale Medien
    Analysis of thiamine in dried yeast by high-performance liquid chromatography and high-performance liquid chromatography/atmospheric pressure chemical ionization-mass spectrometry (1994)
    Springer
    Chromatographia 39 (1994), S. 91-96 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Column liquid chromatography ; Atmospheric pressure chemical ionization-mass spectrometry ; Dried yeast ; Thiamine ; Ion-pair extraction
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary High-performance liquid chromatography (HPLC) and high-performance liquid chromatography/atmospheric pressure chemical ionization-mass spectrometry (HPLC/APCI-MS) have been applied to the analysis of thiamine in dried yeast. Thiamine was extracted from dried yeast with isobutanol containing sodium 1-octanesulfonate as an ion-pairing agent and determined by HPLC on a reversed phase ODS column with UV detection at 254 nm. Response was linear in the range 25–300 μg/g of thiamine in dried yeast with a coefficient of variation in the reproducibility of 8.0%. Thiamine was recovered in good yield (109.2%, n=5). Identification of the thiamine peak was obtained by the mass spectrum using the HPLC/APCI-MS system. The utility of the selected ion monitoring technique using the HPLC/APCI-MS was also investigated. The results obtained by this method are in good agreement with those obtained by the thiochrome method [1].
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02320465
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