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  • Artikel: DFG Deutsche Nationallizenzen  (36)
  • 1990-1994  (22)
  • 1980-1984  (14)
  • 1
    Digitale Medien
    Digitale Medien
    Metamorphic evidence for an inverted crustal section, with constraints on the Main Karakorum Thrust, Baltistan, northern Pakistan (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of metamorphic geology 9 (1991), S. 0 
    Details
    ISSN: 1525-1314
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geologie und Paläontologie
    Notizen: Abstract The Shyok Suture Zone separates rocks in the Asian plate from rocks in the Kohistan-Ladakh island arc. In Baltistan, this suture has been reactivated by the late ‘break-back’Main Karakorum Thrust (MKT). The P-T histories of metamorphic rocks both north and south of the MKT have been determined in an effort to place constraints on the tectonic history of this zone. The terranes north and south of the MKT have different, unrelated metamorphic histories. Rocks from the Kohistan-Ladakh island arc south of the MKT have undergone a static low-P (2–4 kbar, c. 500° C) thermal metamorphism. The P-T paths and metamorphic textures of these rocks are consistent with metamorphism due to emplacement of plutonic rocks into the island arc. This metamorphism pre-dates folding and deformation of these rocks. Rocks in the Karakorum Metamorphic Complex, north of the MKT, have experienced a complex deformational and metamorphic history. Prograde metamorphic isograds have been deformed by subsequent south-verging folding and by gneiss dome emplacement. However, decompression metamorphic reactions occurred during nappe emplacement. Higher pressure rocks are associated with higher level nappes, creating an inverted pressure metamorphic sequence (8–9-kbar rocks over 5–6-kbar rocks). There is little variation in temperature with structural level (550–625° C). These two different terranes have been juxtaposed after metamorphism by the late south-directed MKT.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1525-1314.1991.tb00535.x
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  • 2
    Digitale Medien
    Digitale Medien
    Substrate-mediated inactivation of urocanase from Pseudomonas putida. Evidence for an essential sulfhydryl group (1980)
    s.l. : American Chemical Society
    Biochemistry 19 (1980), S. 5814-5818 
    Details
    ISSN: 1520-4995
    Quelle: ACS Legacy Archives
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/bi00566a024
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  • 3
    Digitale Medien
    Digitale Medien
    Mechanism of urocanase as studied by deuterium isotope effects and labeling patterns (1981)
    s.l. : American Chemical Society
    Biochemistry 20 (1981), S. 132-137 
    Details
    ISSN: 1520-4995
    Quelle: ACS Legacy Archives
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/bi00504a022
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  • 4
    Digitale Medien
    Digitale Medien
    Transient-state kinetic analysis of urocanase (1982)
    s.l. : American Chemical Society
    Biochemistry 21 (1982), S. 2795-2798 
    Details
    ISSN: 1520-4995
    Quelle: ACS Legacy Archives
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/bi00540a034
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  • 5
    Digitale Medien
    Digitale Medien
    Glucocorticoid Stimulation of Glutamine Synthetase Production in Cultured Rat Glioma Cells (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 34 (1980), S. 0 
    Details
    ISSN: 1471-4159
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Abstract: A sensitive radioisotopic assay has been used to examine the kinetic properties and regulation of biosynthesis of glutamine synthetase in C-6 glioma cultures. The Km values for glutamate, MgATP, and ammonium ion were 5mM, 14 mM, and 0.042 mM, respectively, when measured at the pH optimum of 7.2. There was an absolute requirement for a divalent metal ion, with 15 mM- Mg2+ being the preferred ion at pH 7.2. Activity was completely inhibited after 30 min with 8 mM-L-methionhe sulfoximine. The addition of 1 μM-cortisol to C-6 cultures caused a two to threefold increase in glutamine synthetase specific activity over a 96-h period, while dexamethasone at the same concentration elevated the level some 7-10-fold. This was specific for glucocorticoids, as other steroid hormones or catecholamines did not significantly affect glutamine synthetase specific activity. Cycloheximide (30 μM) or actinomycin D (0.01 μg/ml) blocked the hormone response. The continued presence of hormone was required in order to maintain an elevated enzyme level. The results suggest that glucocorticoids act to induce glutamine synthetase by stimulating new enzyme synthesis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1471-4159.1980.tb09659.x
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  • 6
    Digitale Medien
    Digitale Medien
    An experimental study of nonlinear waves produced by an accelerating plate (1992)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 4 (1992), S. 2456-2465 
    Details
    ISSN: 1089-7666
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The free-surface flow generated by an impulsively accelerating, surface-piercing, vertical plate has been studied experimentally in an open channel of constant depth. The flat vertical plate is fixed on a towing carriage that is set off by suddenly dropping a weight bucket through a connecting steel cable in a pulley system. The free-surface profile in front of the plate and the pressure distribution on the plate surface are measured for three different accelerations of the plate. A capacitance-type wave gauge is used to measure the variations of the water surface, while a variable reluctance pressure transducer is used to measure the pressure on the plate surface. The acceleration of the plate is obtained by means of an accelerometer. All response voltage outputs are recorded on an IBM PC-XT personal computer with a data-acquisition electrical board. Experimental measurements are compared with the numerical, viscous-flow results of Yang and Chwang (IIHR Report No. 332; Iowa Institute of Hydraulic Research, The University of Iowa, 1989) and the analytical, inviscid-flow solution of Chwang [Phys. Fluids 26, 383 (1983)]. The agreement of the free-surface profile and the pressure distribution between the numerical results and the present experimental measurements is fairly good. However, the inviscid-flow solution overpredicts the wave amplitude and the pressure distribution on the plate. In the physical experiments, the water surface is observed to rise in front of the vertical plate where the potential-flow theory becomes singular.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.858434
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  • 7
    Digitale Medien
    Digitale Medien
    The development of a swirling round laminar jet (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 986-988 
    Details
    ISSN: 1089-7666
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The development of a swirling round laminar jet in an unbounded viscous fluid is investigated in this Brief Communication by applying the unsteady Stokes equations instead of the full Navier–Stokes equations. The solutions corresponding to a constant linear-momentum source, an impulsive linear-momentum source, and constant and impulsive angular-momentum sources are presented. Since the Stokes equations are linear, these results can be superimposed together. For a constant linear-momentum source and a constant angular-momentum source, the present results reduce to the Stokeslet and rotlet solutions, which are the singular solutions of the Stokes equations, respectively, as time approaches infinity. It is also found that the developing flow field due to a linear-momentum source at the initial stage is irrotational and has a dipolelike structure. However, the developing flow field due to an angular-momentum source is immediately rotational and the magnitude of the velocity is exponentially small.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.857977
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  • 8
    Digitale Medien
    Digitale Medien
    Rotation of a torus (1990)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 2 (1990), S. 1309-1311 
    Details
    ISSN: 1089-7666
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: In order to study the rotational motion of a vortex ring or the locomotion of bacteria, which propel their cells by rotating their long curved filaments called flagella, the low-Reynolds-number flow resulting from the rotation of a torus is studied. The velocity field is obtained by distributing uniform rotlets along a circle with the rotlet directions tangent to the circle. It is found that the effect of curvature of this ring distribution of uniform rotlets is to displace this rotlet ring from the center of the cross section toward the outside of the torus in the normal direction. The net force exerted on the surrounding fluid by the rotational torus is zero. The net torque acting on the fluid is also zero.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.857580
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  • 9
    Digitale Medien
    Digitale Medien
    The Exchange in Intact Squid Axonsa (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 639 (1991), S. 0 
    Details
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1749-6632.1991.tb17290.x
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  • 10
    Digitale Medien
    Digitale Medien
    Membrane contact, fusion and hexagonal (HII) transitions in phosphatidylethanolamine liposomes (1990)
    s.l. : American Chemical Society
    Biochemistry 29 (1990), S. 2976-2985 
    Details
    ISSN: 1520-4995
    Quelle: ACS Legacy Archives
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/bi00464a013
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