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  • 11
    Digitale Medien
    Digitale Medien
    A γ-ray burst preceded by X-ray activity (1991)
    [s.l.] : Nature Publishing Group
    Nature 350 (1991), S. 592-594 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The first y-ray burst observed in the X-ray photon energy band was GB720427, which was detected in the 2-8 keV range4. X-ray data from GB720514 provided some evidence5 that an accompanying X-ray signal might have lasted longer than the y-ray event. Detailed X-ray observations of four catalogued ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/350592a0
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  • 12
    Digitale Medien
    Digitale Medien
    The radio nebula of the soft γ-ray repeater 1806 – 20 (1994)
    [s.l.] : Nature Publishing Group
    Nature 368 (1994), S. 129-131 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The new Very Large Array (VLA) observations were obtained on 14 September 1993 with the VLA in the "DnC" configuration. Our previous observations2 showed that G10.0 — 3 was an amorphous non-thermal nebula, consistent with an old SNR, but these observations left open questions about the ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/368129a0
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  • 13
    Digitale Medien
    Digitale Medien
    MR imaging of mixed hepatocellular and cholangiocellular carcinoma (1994)
    Springer
    Abdominal imaging 19 (1994), S. 430-432 
    Details
    ISSN: 1432-0509
    Schlagwort(e): Mixed hepatocellular and cholangiocellular, carcinoma ; MR imaging ; Dynamic MR imaging-Histopathologic study
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Two patients with mixed hepatocellular and cholangiocellular carcinoma underwent partial hepatectomy after magnetic resonance (MR) imaging. Correlation is made with the histopathologic manifestations. In both cases the tumors showed relative low signal intensities on T1-weighted spin-echo (SE) images and high signal intensities on T2-weighted SE images. Dynamic MR imaging showed the enhancement from the periphery of the tumor to the inner area gradually and the enhancement continued into the delayed phase. With both cases fibrosis was marked in the inner area of the tumor compared to the peripheral area. The extent and degree of fibrotic tissue is considered to reflect the enhancement on dynamic MR imaging.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00206932
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  • 14
    Digitale Medien
    Digitale Medien
    Closed circulation in the rat spleen as evidenced by scanning electron microscopy of vascular casts (1973)
    Springer
    Cellular and molecular life sciences 29 (1973), S. 1374-1375 
    Details
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Zusammenfassung Rasterelektronenmikroskopische Beobachtungen der Methakrylatausgüsse der Blutgefässe von Rattenmilz ergeben, dass jedes Arteriolenende unmittelbar mit einem Sinus verknüpft ist. Man bekommt nirgends ein Bild, das eine offene Endigung der Arteriolen in die Milzsträge andeutet. Dieses Ergebnis stützt die «geschlossene» Theorie der Milzgefässe, die neuerdings von der «offenen» Theorie überschattet scheint.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01922828
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  • 15
    Digitale Medien
    Digitale Medien
    Diffuse pulmonary arteriovenous fistula shown by contrast echocardiography and pulmonary angiography (1991)
    Springer
    Pediatric radiology 21 (1991), S. 128-128 
    Details
    ISSN: 1432-1998
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We report an 11-year-old boy with diffuse pulmonary arteriovenous fistula (multiple telangiectasia type). Contrast echocardiography proved R to L shunting at the peripheral levels of the lungs. A definitive diagnosis was obtained by pulmonary arteriography.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02015624
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  • 16
    Digitale Medien
    Digitale Medien
    High-spin isomeric state in144Pm (1993)
    Springer
    The European physical journal 345 (1993), S. 123-124 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.−k ; 27.60. +j
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A new high-spin isomeric state with a half-life of ≥2μs was found in144Pm by observing the14N(136Xe,6n)144Pm reactions. The excitation energy and spin of the isomer were estimated to be ∼7.4 MeV and ∼27+, respectively. Filling gas in a recoil ion separator was used as the target material.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01290348
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  • 17
    Digitale Medien
    Digitale Medien
    High-spin states of145Sm (1994)
    Springer
    The European physical journal 350 (1994), S. 185-186 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.-k ; 27.60.+j
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract High-spin states of145Sm were studied by using the20Ne(136Xe, α7n),139La (10B, 4n) and138Ba(13C,6n) reactions. The decay scheme of a high-spin isomer of145Sm was established. The excitation energy and the spin-parity of the isomer were determined to be 8.8 MeV and (49/2+), respectively. The level scheme was extended up to the (65/2) state at 14.6 MeV. The experimental results were discussed comparing with the deformed independent particle model (DIPM) calculation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01289580
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  • 18
    Digitale Medien
    Digitale Medien
    Left ventricular wall stress distribution in chronic pressure and volume overload: effect of normal and depressed contractility on regional stress-velocity relations (1990)
    Springer
    Basic research in cardiology 85 (1990), S. 367-383 
    Details
    ISSN: 1435-1803
    Schlagwort(e): left ventricular regionalwall stress ; stress-velocity relationship ; left ventricularhypertrophy ; depressedmyocardial contractility ; preload dependency
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Regional stress-velocity relations were determined in a first group of patients (n=15) with normal (five controls, five patients with aortic stenosis, and five patients with aortic insufficiency) and a second group of patients (n=10) with depressed contractility (five patients with aortic stenosis and five with aortic insufficiency). LV circumferential wall stress was calculated from high-fidelity pressure and frame-by-frame angiocardiographic data using the Wong thick-wall model. Regional wall stress and shortening velocity were calculated from the endo-to the epicardium, and from the equator to the apex at 35 points. Regional LV wall stress was in all patients lower at the epi- than the endocardium, and lower at the apex than the equator. Regional stress-velocity relations were downward shifted from the endo- to the epicardium and from the equator to the apex (family of curves) in both groups. At corresponding LV regions stress-velocity relations showed significantly smaller slopes and intercepts (downward depression) in group 2 than in group 1. Thus, wall stress distribution is inhomogeneous in the normal, as well as in the pressure and volume overloaded left ventricle. Regional differences in stress-velocity relations within groups (family of curves) are probably related to changes in preload rather than to changes in regional contractility. Downward depression of the regional stress-velocity relations in group 2 is caused by depressed myocardial contractility.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01907129
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  • 19
    Digitale Medien
    Digitale Medien
    The Hard X-ray Telescope (HXT) for the SOLAR-A mission (1991)
    Springer
    Solar physics 136 (1991), S. 17-36 
    Details
    ISSN: 1573-093X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The Hard X-ray Telescope (HXT) is a Fourier-synthesis imager; a set of spatially-modulated photon count data are taken from 64 independent subcollimators and are Fourier-transformed into an image by using procedures such as the maximum entropy method (MEM) or CLEAN. The HXT takes images of solar flares simultaneously in four energy bands, nominally 15 (or 19)–24, 24–35, 35–57, and 57–100 keV, with an ultimate angular resolution as fine as ∼ 5 arc sec and a time resolution 0.5 s. Each subcollimator has a field of view wider than the solar disk. The total effective area of the collimator/detector system reaches ∼ 70 cm2, about one order of magnitude larger than that of the HINOTORI hard X-ray imager. Thanks to these improvements, HXT will for the first time enable us to take images of flares at photon energies above ∼ 30 keV. These higher-energy images will be compared with lower-energy ones, giving clues to the understanding of nonthermal processes in solar flares, i.e., the acceleration and confinement of energetic electrons. It is of particular importance to specify the acceleration site with regard to the magnetic field figuration in a flaring region, which will be achieved by collaborative observations between HXT and the Soft X-ray Telescope on board the same mission.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00151693
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  • 20
    Digitale Medien
    Digitale Medien
    Natural abundance of 15N in tropical plants with emphasis on tree legumes (1993)
    Springer
    Plant and soil 153 (1993), S. 295-304 
    Details
    ISSN: 1573-5036
    Schlagwort(e): natural 15N abundance ; N2 fixation ; Panicum maximum ; tree legumes ; tropical ecosystem
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract Natural abundance of 15N (δ 15N) of leaves harvested from tropical plants in Brazil and Thailand was analyzed. The δ 15N values of non-N2-fixing trees in Brazil were +4.5±1.9‰, which is lower than those of soil nitrogen (+8.0±2.2‰). In contrast, mimosa and kudzu had very low δ 15N values (−1.4≈+0.5‰). The δ 15N values of Panicum maximum and leguminous trees, except Leucaena leucocephala, were similar to those of non-N2-fixing trees, suggesting that the contribution of fixed N in these plants is negligible. The δ 15N values of non-N2-fixing trees in Thailand were +4.9±2.0‰. Leucaena leucocephala, Sesbania grandiflora, Casuarina spp. and Cycas spp. had low δ 15N values, close to the value of atmospheric N2 (0‰), pointing to a major contribution of N2 fixation in these plants. Cassia spp. and Tamarindus indica had high δ 15N values, which confirms that these species are non-nodulating legumes. The δ 15N values of Acacia spp. and Gliricidia sepium and other potentially nodulating tree legumes were, on average, slightly lower than those of non-N2-fixing trees, indicating a small contribution of N2 fixation in these legumes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00013003
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