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  • 1
    Electronic Resource
    Electronic Resource
    A stable superconducting state at 8 K and ambient pressure in $$\alpha _t - (BEDT - TTF^ \star )_2 I_3 ^1 $$ (1987)
    Springer
    The European physical journal 67 (1987), S. 489-495 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report bulk superconductivity at 8 K and ambient pressure in crystals of α t (BEDT-TTF)2I3. In contrast to the earlier observed metastable superconducting state at 8 K in crystals of β-(BEDT-TTF)2I3 here the superconducting state is stable and the crystals can be prepared by tempering α-(BEDT-TTF)2I3 above 70 °C for several days. ac-susceptibility measurements show that the observed superconducting state at 8 K is a bulk property of the crystals. Resistivity measurements indicate a sharp superconducting transition at 8 K with an onset temperature of about 9 K. The upper critical fields Hc2 at 1.3 K lie between 3 and 11 T depending on the direction of the magnetic field with respect to the crystal axes. ESR- as well as NMR-measurements indicate a total transformation of the α-phase crystals into the new superconducting α t -crystals after tempering.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01304118
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  • 2
    Electronic Resource
    Electronic Resource
    Rezidivierende Meningitis bei familiärem Mangel der achten Komponente des Komplementsystems (1987)
    Springer
    Journal of molecular medicine 65 (1987), S. 387-390 
    Details
    ISSN: 1432-1440
    Keywords: Complement system ; C8-deficiency ; Meningococcal meningitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An 18-year-old man suffered from recurrent bacterial meningitis. Investigation of the complement system revealed deficiency of the 8th complement component (C8) in the patient and his sister. Genetic defects of the terminal complement components C5 to C8 predispose toNeisseria infections, probably due to a lack in bacteriolytic activity. It is to be noted that 1 year ago the patient had been hospitalized for a culture-proved pneumococcal meningitis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01745581
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  • 3
    Electronic Resource
    Electronic Resource
    The double-stack structure of di(3,4-ethylenedithio-3',4'-dimethyl-2,2',5,5'-tetrathiafulvalenium) perchlorate, (DIMET)2ClO4 (1987)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 43 (1987), S. 115-117 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S010827018709680X
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  • 4
    Electronic Resource
    Electronic Resource
    Short-acting novel MAO inhibitors: In vitro evidence for the reversibility of MAO inhibition by moclobemide and Ro 16-6491 (1987)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 335 (1987), S. 12-20 
    Details
    ISSN: 1432-1912
    Keywords: MAO-A ; MAO-13 ; Short-acting MAO inhibitors ; In vitro reversibility ; Rat brain and liver
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The inhibition of monoamine oxidase (MAO) in rat liver and brain by the short-acting MAO-A inhibitors moclobemide (Ro 11-1163 = p-chloro-N-[2-morpholinoethyl]benzamide) and brofaremine and by the short-acting MAO-13 inhibitors Ro 16-6491 (N-[2-aminoethyl]-p-chlorobenzamide) and almoxatone, administered p. o. at roughly equieffective doses 2 h before decapitation, was investigated for its reversibility under various in vitro conditions. MAO A activity in liver homogenates, inhibited by moclobemide (300 μmol/kg) to approx. 15% of control, time dependently recovered during 0.5 to 2 h of incubation at 37°C, irrespective of whether the homogenates were prepared and incubated in distilled water or Krebs-Ringer buffer (KRB). Dialysis of such homogenates for 4 h in distilled water at 37°C (but not at 13°C) led to a complete return of the MAO activity. In liver homogenates from rats pretreated with brofaremine (30 μmol/kg), dialysis for 4 h at 37°C against distilled water caused only little recovery of the MAO activity. Likewise, MAO-B inhibited by Ro 16–6491 (30 μmol/kg) to approx. 4% of control returned to almost control activity after 4 h of dialysis at 37°C, while inhibition induced by almoxatone (30 μmol/kg) was little or not reversed at all. In brain homogenates prepared in, and dialysed against, distilled water or KRB at 37°C (but not at 13°C), MAO-A inhibited by moclobemide (100–300 μmol/kg) to approx. 15% of control, partially (KRB) or almost completely (dist. water) returned to control activity after 4 h of dialysis. From rats pretreated with Ro 16–6491 (30 μmol/kg), MAO-B in brain homogenates prepared in KRB was reduced to 12% of control and returned to control value upon dialysis for 4 h in KRB at 37°C; in homogenates prepared in H2O, MAO-B was reduced to only 60% of control and completely recovered by dialysis against dest. water even at 13°C. In all of these conditions, recovery of the enzyme activity was small after brofaremine and almoxatone. Analogous results were obtained with brain slices (0.2 × 0.2 × 1.5 mm) in KRB at 37°C, whereby time dependent recovery of MAO activity during incubation was achieved, and superfusion was somewhat more effective than incubation in restoring enzyme activity. In the experiments with incubated or superfused brain slices, inhibition of MAO-A and -B by the irreversible inhibitors clorgyline and selegiline (l-deprenyl), resp., could not be reversed at all. Tyramine (0.3 mmol/l) clearly enhanced the recovery of MAO-A in KRB-prepared liver homogenates and brain slices of moclobemide-pretreated rats but not in brain slices of brofaremine- and clorgyline-pretreated rats. Thus, the reversibility of MAO inhibition in vitro could be convincingly demonstrated for moclobemide and Ro 16–6491 but not for the other novel, short-acting MAO inhibitors studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00165029
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  • 5
    Electronic Resource
    Electronic Resource
    Spontane und andere nicht tumorbedingte Oesophagusperforationen (1987)
    Springer
    Langenbeck's archives of surgery 371 (1987), S. 183-192 
    Details
    ISSN: 1435-2451
    Keywords: Esophageal perforation ; Paraesophageal surgery ; Instrumentation in the upper G. I. tract ; Boerhaave's syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Prognose der Oesophagusperforation ist abhängig von der Ursache und Lokalisation, sie wird jedoch hauptsächlich durch das Zeitintervall zwischen Verletzung und Therapiebeginn bestimmt. Spontane und intraoperative Speiseröhrenverletzungen sind am gefährlichsten. Therapie der Wahl ist die direkte Naht mit Drainage des Wundgebietes. Falls das nicht möglich ist, sollte eine Oesophagektomie oder die collare Oesophagusausleitung bedacht werden. Die Verletzung kann sich mit sehr unspezifischen Symptomen präsentieren, pathologische Befunde auf der Thoraxübersichtsaufnahme oder der Kontrastmittelaustritt bei der intraluminären Darstellung mit Gastrographin bestätigen die Diagnose jedoch in fast allen Fällen.
    Notes: Summary The outcome of esophageal perforation is determined by the cause and localisation, but mainly by the time lapse between trauma and therapy. Spontaneous and intraoperative ruptures are most dangerous. Treatment of choice is direct closure and drainage. If this is not possible, esophagectomy or exclusion and diversion in continuity should be considered. The injury may present itself with rather unspecific symptoms. Pathological findings in the plain chest roentgenogram and gastrographin study will confirm diagnosis in nearly all cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01259429
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  • 6
    Electronic Resource
    Electronic Resource
    Unusual excitation-energy division in quasi-fission reactions between50Ti,54Cr and58Fe with207,208Pb at the barrier (1987)
    Springer
    The European physical journal 328 (1987), S. 255-256 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290670
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  • 7
    Electronic Resource
    Electronic Resource
    Evidence for quasi-fission in40Ar+208Pb collisions near the coulomb-barrier (1987)
    Springer
    The European physical journal 326 (1987), S. 313-326 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.Jj
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fission-fragment angular distributions were measured in the reaction of40Ar with208Pb near the fusion barrier. For nearly symmetric mass-/charge splits we find angular distributions symmetric around θ=90 degrees, however, with unusually large anisotropies. These develop gradually into forward-backward asymmetric distributions as one moves away from mass-/charge symmetry. This indicates that non-compound fission (‘quasi-fission’) competes with true fusion-fission. The relative contribution of quasi-fission to the total fission cross section is somewhere between 51 and 85%. In the framework of the extra-push model this is equivalent to an extra-extra push energy for compound-nucleus formation inside the true fission saddle point of 4〈E xx 〈9 MeV in agreement with a recent empirical parametrization of fusion-barrier shifts based on fusion-fission cross sections. On the basis of cross sections for fusion-evaporation residues it had previously been concluded that fusion of40Ar with Pb isotopes occurs unhindered. Possible reasons for this apparent discrepancy are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01297586
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  • 8
    Electronic Resource
    Electronic Resource
    Darstellung und Kristallstruktur von Blei(II)-monoglycerat (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 550 (1987), S. 102-108 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Crystal Structure of Lead(II) MonoglycerolateCrystals of lead(II) monoglycerolate, of a quality suitable for diffraction studies, have been prepared from an alkaline plumbate solution and an excess of glycerol. The compound crystallizes in the monoclinic space group P21/c with a = 5.617(6) Å, b = 9.471(8) Å, c = 9.726(7) Å, β = 102.65(11)°. The structure was refined by full matrix least-squares techniques to an R value (1026 F0) of 0.078. The compound to which the formula Pb(C3H6O3) could be assigned, is polymeric in one direction. The lead and a part of the oxygen atoms built up a zig-zag chain parallel to the aaxis. The oxygen form a distorted tetragonal pyramid with lead at the apex. A decomposition temperature of 235°C has been determined.
    Notes: Blei(II)-monoglycerat kristallisiert monoklin (Raumgruppe P21/c) mit a = 5,617(6) Å, b = 9,471(8) Å, c = 9,726(7) Å, β = 102,65(11)° und Z = 4. Die Verfeinerung der Kristallstruktur mittels der Methode der kleinsten Fehlerquadrate ergab R = 0,078.Pb(C3H6O3) zeigt einen bemerkenswerten Aufbau. An der Koordination von Blei sind jeweils vier Glyceratdianionen beteiligt. Dabei heben sich Vierecke, die aus Blei und Sauerstoff gebildet werden, heraus. Diese Vierecke sind zickzackförmig miteinander verbunden und verlaufen parallel zur a-Achse. Untereinander sind diese eindimensional unendlichen Zickzackbänder durch die Glyceratreste abgeschirmt. Nach DTA-Untersuchungen ist die Zersetzungstemperatur von Blei(II)-monoglycerat 235°C.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19875500711
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