Search Results - (Author, Cooperation:J. Mathis)

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  1. 1
    Staff View
    Publication Date:
    2012-06-09
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Arctic Regions ; Biomass ; Diatoms/growth & development ; *Eutrophication ; *Ice Cover ; Light ; Nitrates/analysis ; Oceans and Seas ; Photosynthesis ; Photosystem II Protein Complex/analysis ; Phytoplankton/*growth & development ; Seawater/chemistry
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Mathis, J. E. ; Compton, R. N.

    College Park, Md. : American Institute of Physics (AIP)
    Published 1996
    Staff View
    ISSN:
    1089-7690
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Chemistry and Pharmacology
    Notes:
    Single and multiple photon ionization photoelectron spectroscopy of triethylamine (TEA) was studied using a newly developed high-resolution electron spectrometer which utilizes position sensitive detection. The adiabatic ionization potential of TEA was accurately determined using both single (7.47±0.04 eV) and multiphoton (7.53±0.10 eV) ionization photoelectron spectroscopy. Although excitation to both the S1 and S2 states can occur, multiphoton ionization always occurs out of the S1 state. When the cation dissociates, the distribution of photoelectron energies similarly reflects this partitioning between S1 and S2. © 1996 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  3. 3
    Staff View
    ISSN:
    0022-4731
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  4. 4
    Articles: DFG German National Licenses
  5. 5
    Staff View
    ISSN:
    0960-894X
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  6. 6
    Staff View
    ISSN:
    0960-894X
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  7. 7
    Articles: DFG German National Licenses
  8. 8
    Hartke, B. ; Manz, J. ; Mathis, J.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0301-0104
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  9. 9
    Staff View
    ISSN:
    1572-9605
    Keywords:
    YBa2Cu3O x tapes ; RABiTS ; high critical current density
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Electrical Engineering, Measurement and Control Technology
    Physics
    Notes:
    Abstract Progress in the fabrication of epitaxial, high-J c, biaxially aligned YBCO thick films on Rolling-assisted biaxially textured substrates (RABiTs) is reported. RABiT substrates comprise a biaxially textured metal substrate with epitaxial oxide buffer layers suitable for growth of superconductors. Oxide buffer layers have been deposited using three techniques: laser ablation, electron-beam evaporation, and sputtering. Epitaxial YBCO films grown using laser ablation on such substrates have critical current densities approaching 3 × 106 A/cm2 at 77 K in zero field and have field dependences similar to epitaxial films on single crystal ceramic substrates. Critical current densities in excess of 0.2 MA/cm2 have been obtained on stronger, nonmagnetic substrates. In addition, samples with J e of 12.5 kA/cm2 at 77 K have been fabricated. The highest strain tolerence obtained so far is 0.7% in compression and 0.25% in tension. Deposited conductors made using this technique offer a potential route for the fabrication of long lengths of high-J c wire capable of carrying high currents in high magnetic fields and at elevated temperatures.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  10. 10
    Winckel, Van. H. ; Mathis, J. S. ; Waelkens, C.

    [s.l.] : Nature Publishing Group
    Published 1992
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] The four stars BD + 39°4926 (refs 2-4), HR4049 (refs 3, 5, 6), HD52961 (ref. 6) and HD44179 (refs 7, 8) are all intrinsically luminous, but their galactic latitudes suggest that they are of low mass. They must currently be in a short and advanced evolutionary stage, presumably between the ...
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  11. 11
    Staff View
    ISSN:
    1432-1920
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract We assessed the effect of systemic heparinization on the in-vivo thrombogenicity of various micro- and guiding catheters in a swine model. Microcatheters were placed through 6-F guiding catheters into the common carotid arteries of swine for 30-min (short-term) and 90-min (medium-term) periods, with and without systemic heparinization. At the end of the placement period the microcatheters were retracted through the guiding catheters and fixed for scanning electron microscopy (SEM). Guiding catheters were harvested after 5 h placement, with and without systemic heparinization, by retraction through 8-F sheaths and fixed for SEM. The surfaces of both hydrophilic and nonhydrophilic microcatheters all demonstrated more accumulation of debris during placement without than with systemic heparinization. The difference was primarily in the amount of fibrillary material on the catheter surface. The guiding catheters also demonstrated increased debris accumulation without systemic heparinization. This suggests that, even when using relatively nonthrombogenic catheters, systemic heparinization is indicated during cerebral angiography.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  12. 12
    Staff View
    ISSN:
    1432-1920
    Keywords:
    Key words Meningioma ; Interventional neuroradiology ; Embolization ; complications
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract We report a case of hemorrhage in a parasellar meningioma shortly after embolization of the dural cavernous carotid artery branches supplying the tumor. This represents the first report of hemorrhage within a meningioma resulting from embolization with small (50- to 150-μm) polyvinyl alcohol particles, as well as the first reported case of hemorrhage complicating meningioma embolization from internal rather than external carotid artery branch embolization. We also review previously reported cases of postembolization hemorrhage from meningiomas.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  13. 13
    Mathis, J. M. ; Jensen, M. E. ; Dion, J. E.
    Springer
    Published 1997
    Staff View
    ISSN:
    1432-1920
    Keywords:
    Key words Vasospasm ; Interventional neuroradiology ; Subarachnoid space ; hemorrhage ; Drugs ; intraarterial injection
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract Intra-arterial infusion of papaverine hydrochloride for subarachnoid hemorrhage-induced cerebral vasospasm has become an adjunctive endovascular therapy along with cerebral angioplasty. Our knowledge concerning the mechanism of action, method of administration and potential side effects of this therapeutic alternative are reviewed.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  14. 14
    Lövblad, K. O. ; Bassetti, C. ; Mathis, J. ; Schroth, G.
    Springer
    Published 1997
    Staff View
    ISSN:
    1432-1920
    Keywords:
    Key words Thalamus ; Stroke ; Magnetic resonance imaging ; Sleep
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract The paramedian thalamus is believed to play an important role in the regulation of sleep, and disturbances of sleep regulation are known to occur in paramedian thalamic stroke (PTS). We examined 12 consecutive patients with PTS and sleep disturbance by MRI. Two distinct groups of patients could be defined: six presenting with severe hypersomnia (group 1) and six with slight sleepiness (group 2). On MRI, all patients had ischaemic lesions involving the paramedian thalamic nuclei, the centre of the lesions being the dorsomedial and centromedial thalamic nuclei. In group 1 the lesions were bilateral, butterfly-shaped infarcts involving the paramedian nuclei (three cases), or unilateral with an extension into the subthalamic nuclei. In group 2 the lesions were unilateral and limited to the paramedian nuclei, mainly the dorsomedial nucleus. Bilateral lesions can be attributed to a common origin in some cases for both paramedian thalamic arteries and the mesencephalic arteries.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  15. 15
    Mathis, J. F. ; Watson, C. C.

    Hoboken, NJ : Wiley-Blackwell
    Published 1956
    Staff View
    ISSN:
    0001-1541
    Keywords:
    Chemistry ; Chemical Engineering
    Source:
    Wiley InterScience Backfile Collection 1832-2000
    Topics:
    Chemistry and Pharmacology
    Process Engineering, Biotechnology, Nutrition Technology
    Notes:
    This paper reports a direct experimental comparison of the cracking of cumene in a fluidized bed of silica-alumina catalyst with the same reaction in a fixed bed. The effects of fluidization on the kinetics of this reaction are interpreted in terms of an empirical approach using effectiveness factors and by a simplified mathematical model.
    Additional Material:
    10 Ill.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses