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  • 11
    Electronic Resource
    Electronic Resource
    The thermal conductivity of argon in the critical region (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 6944-6963 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have measured the thermal conductivity of argon at temperatures from 302 K down to 150.8 K and at densities up to 25 mol L−1. The data were obtained with a steady-state method and we employed a guarded parallel-plate apparatus designed especially for investigating the thermal conductivity of fluids in the critical region. To interpret the data in the critical region a scaled crossover equation of state for argon in the critical region has been constructed. Equations for the thermal conductivity and viscosity of argon as a function of density and temperature are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468322
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  • 12
    Electronic Resource
    Electronic Resource
    The thermal conductivity of methane in the critical region (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 105 (1996), S. 10535-10555 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have measured the thermal conductivity of methane at temperatures from 308 K down to 190.585 K, which is just 21 mK above the critical temperature, and at densities up to 14 mol L−1. The data were obtained with an improved guarded parallel-plate cell with a new cryostat that was built especially for measurements in the critical region of methane. The new experimental data have a higher accuracy than those reported previously in the literature and enable us to examine the validity of the currently available theoretical description of the asymptotic and nonasymptotic behavior of the thermal conductivity of fluids in the critical region. Equations for the thermal conductivity of methane in a wide range of temperatures and densities are also presented. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.472943
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  • 13
    Electronic Resource
    Electronic Resource
    Self-consistent domain theory in soft ferromagnetic media. I. Solenoidal distributions in elliptical thin-film elements (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 2168-2173 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The basic concepts of a self-consistent domain theory for the class of ideal soft ferromagnetic media is unfolded. The treatment is based on micromagnetic equilibrium and stability equations which are simplified by removing the contributions due to the intrinsic anisotropy and the spatial variation term in the exchange energy density. Only the solenoidal magnetization distributions in thin film objects are investigated. This limitation makes confinement to two-dimensional dipole distributions possible. Cauchy's method of characteristics is employed to derive dipole distributions that satisfy the relation ∇⋅M=0, where M is the magnetization, and the constitutive equation. It is proved that the characteristic base curves are straight lines perpendicular to the magnetization vector. In an ellipse, four different characteristic base curves that do not coincide intersect at one single point in certain regions, thus generating ambiguities in the magnetization direction. It is demonstrated that these ambiguities originate in the incompatibility of the magnetization distribution that is imposed by the various segments of the edge of the ellipse. Based on differential geometrical principles, a partitioning of the edge into segments is introduced, and along with it two adjoining regions in which the magnetization direction is uniquely determined are defined. It is proved that a domain wall is required in the cross section of both regions to accomplish a dipole configuration in stable equilibrium. Experimental confirmation is given by means of the ferrofluid pattern of a 3500-A(ring)-thick Permalloy layer with elliptical geometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.334357
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  • 14
    Electronic Resource
    Electronic Resource
    Contactless potentiometer based on giant magnetoresistance sensors : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 4310-4312 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present a magnetic sensor based on the giant magnetoresistance (GMR) effect, which can be used as a contactless potentiometer. The sensor consists of a novel GMR sensor scheme with an artificial antiferromagnetic subsystem. The sensor gives a sinusoidal signal in dependence on the direction of a rotating external magnetic field Hrot. With two sensors in a planar setup, the whole 360° angle range can easily be covered. The amplitude ΔR/R of the signal is about 5%. The signal amplitude runs through a very flat maximum and changes only by 5% within a field range of about 4.4–27.2 kA/m. This large field range, the magnetic window (Hw), is the main advantage of this sensor compared to other magnetic sensor physical principles for contactless potentiometers. Therefore, large mounting tolerances and variations in the field strength of the rotating permanent magnet can be accepted. The temperature dependence of the sensor is linear both for the ground resistance (R0) and the signal amplitude (ΔR), allowing simple and effective electronic temperature compensation. The sensor can be operated up to 150 °C. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.364811
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  • 15
    Electronic Resource
    Electronic Resource
    The thermal conductivity of an equimolar methane–ethane mixture in the critical region (1998)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 109 (1998), S. 717-736 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have measured the thermal conductivity of an equimolar mixture of methane and ethane in the vicinity of the critical point. The new experimental data confirm that the thermal conductivity of a mixture does not diverge at the critical point but crosses over to a finite limiting behavior at the critical point. A quantitative representation of the thermal-conductivity data has been obtained in terms of a recently developed extension of the mode-coupling theory that incorporates the crossover between the behavior of the thermal conductivity close to and far away from the critical point. The same theory enables us also to predict other transport properties of the mixture in the vicinity of the critical point. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.476611
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  • 16
    Electronic Resource
    Electronic Resource
    The plasma–sheath transition in an asymmetric collisionless plasma (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 838-846 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The plasma–sheath problem (λD → 0) for an asymmetric warm collision-free plasma is solved in plane parallel geometry. To this end Emmert's model source term [Phys. Fluids 23, 803 (1980)] is generalized to account for a superimposed plasma drift. The quasineutral plasma approximation results in a system of coupled integral equations that can be solved analytically. In contrast to Emmert's symmetric model the upstream facing sheath edge shows the usual field singularity. At the downstream facing sheath edge, a finite field strength and an oversatisfied Bohm criterion are found. These results are in full agreement with general considerations on the Bohm criterion and on the sheath edge field singularity [Phys. Fluids B 1, 961 (1989)].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859879
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  • 17
    Electronic Resource
    Electronic Resource
    Ultrafast precessional magnetization reversal by picosecond magnetic field pulse shaping (2002)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 418 (2002), S. 509-512 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Since the invention of the first magnetic memory disk in 1954, much effort has been put into enhancing the speed, bit density and reliability of magnetic memory devices. In the case of magnetic random access memory (MRAM) devices, fast coherent magnetization rotation by precession of the entire ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature00905
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  • 18
    Electronic Resource
    Electronic Resource
    Thin-layer chromatographic detection of some N-acylglycine conjugates in urine
    Amsterdam : Elsevier
    Journal of Chromatography A 104 (1975), S. 219-222 
    Details
    ISSN: 0021-9673
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0021-9673(01)85517-5
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  • 19
    Electronic Resource
    Electronic Resource
    Identification of M"r variants of proclatin with monoclonal antibodies
    Amsterdam : Elsevier
    FEBS Letters 171 (1984), S. 192-196 
    Details
    ISSN: 0014-5793
    Keywords: Fragment ; Immunoblotting ; Monoclonal antibody ; Proclatin ; SDS-PAGE ; Variant
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(84)80486-X
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  • 20
    Electronic Resource
    Electronic Resource
    In vitro synthesis of 16α-hydroxyestrone by female rat liver microsomes: Its possible role in the etiology of breast cancer
    Amsterdam : Elsevier
    Journal of Steroid Biochemistry 36 (1990), S. 527-531 
    Details
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-4731(90)90169-S
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