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  • 1
    Electronic Resource
    Electronic Resource
    Effect of biquadratic exchange coupling on magnetoresistance and magnetization process in magnetic bilayer systems (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 4430-4432 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An improved model is proposed to deal with the magnetic bilayer systems taking into account the contribution of the anisotropy energy and biquadratic exchange coupling to elaborate on the evolution of the magnetoresistance (MR) ratio and magnetization process. The results indicate that the characteristic behavior of the MR ratio depends distinctly on both the biquadratic coupling constant and the layer thickness. The profile of the MR ratio was found to vary from an inverted bell shape to a concave pyramid with increasing biquadratic coupling strength, and decays sharply with the layer thickness. This model calculation helps us to provide a venue for further understanding the MR or giant magnetoresistance behavior of the magnetic multilayer system. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370364
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  • 2
    Electronic Resource
    Electronic Resource
    180° domain wall with the coordinate dependent azimuthal angle of magnetization : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 6060-6062 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Structure of 180° one-dimensional domain wall (DW) in a uniaxial ferromagnet in the presence of an external magnetic field arbitrarily oriented with respect to the DW has been investigated. Solutions of the system of equations which describe the behavior of the magnetic moment inside the DW in the case when the magnetization azimuthal angle is dependent upon the coordinate normal to the DW have been obtained and influence of magnetic field on the structure of the DW analyzed. Dependences of the effective widths of the distributions of both the polar and azimuthal angles of magnetization across the DW proper have been obtained. The effective width due to the azimuthal angle variation along the DW normal was found to increase with increasing transverse field. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362091
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  • 3
    Electronic Resource
    Electronic Resource
    Domain wall dynamics with nonconcervation of magnetization modulus : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 4066-4068 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The influence of the nonconservation of magnetization modulus on the steady-state motion of a planar domain wall in the presence of an external field normal to the anisotropy axis is studied. It is shown that the nonconservation of magnetization modulus gives a noticeable contribution to the domain wall mobility in ferromagnets with narrow line of ferromagnetic resonance and almost does not affect the domain wall mobility in ferromagnets with wide line of the ferromagnetic resonance. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.364888
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of Nd magnetic subsystem on spin-reorientation phase transition in Nd2CuO4 at low temperature : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 4154-4156 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Acoustic measurements on Nd2CuO4 single crystals have recently revealed a ferroelastic phase transition at about Tc=5 K. In view of the strong magnetoelastic coupling in the compound it was attributed to an additional reorientation of Cu spins. In the present report it is shown that this transition can be successfully described if one takes the Nd magnetic subsystem into account explicitly. This approach requires treating a phenomenological Hamiltonian within invariants of the fourth order in spins only, which is natural for a tetragonal symmetry of the system. Complementary information about the strength of Nd–Nd interactions has been derived. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365051
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  • 5
    Electronic Resource
    Electronic Resource
    Identification of a new trace 114R SiC by HREM (1999)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 55 (1999), S. 255-257 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Using electron diffraction patterns and high-resolution electron microscopy (HREM), a trace 114R SiC in commercial α-SiC powder (mainly 6H SiC according to X-ray diffraction) has been discovered. In a hexagonal unit cell its stacking sequence is [(33)4(34)2]3, the periodicity along the c axis is 286.14 Å and a = b = 3.073 Å. 114R belongs to the structure series of (33)〈inf/〉n34(33)〈inf/〉m34 predicted theoretically by Pandey & Krishna [Mater. Sci. Eng. (1975), 20, 243–249] on the basis of the faulted matrix model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108768198011987
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  • 6
    Electronic Resource
    Electronic Resource
    Objective measures of the information density of satellite data (1996)
    Springer
    Meteorology and atmospheric physics 60 (1996), S. 105-117 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Summary We propose and objective method whereby the density of Shannon's “information” associated with the retrieval of a profile of atmospheric variables from satellite-derived infrared radiance measurements may be estimated. The technique is a natural extension of one we previously proposed to estimate the effective data density in a profile. We test the method in a comparison of simulated satellite instruments to show that the method does indeed provide an objective summary of the spatial distribution of each instrument's information content. We propose that further extensions of the method be developed to include other more traditional data sources in a fully three-dimensional scheme. We also note that analogous and compatible methods may be used to diagnose the information content of meteorological analysis and forecast fields relative to the information contained in the covariance, at the appropriate season, of the corresponding climate fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01029788
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  • 7
    Electronic Resource
    Electronic Resource
    Construction and expression of single-chain Fv antibody against human bladder carcinoma (1996)
    Springer
    Urological research 24 (1996), S. 273-277 
    Details
    ISSN: 1434-0879
    Keywords: Single-chain Fv antibody ; Expression ; Polymerase chain reaction ; Hybridoma ; Bladder carcinoma ; ELISA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We designed two sets of oligonucleotide primers to amplify the immunoglobulin heavy- and light-chain variable-region genes from genomic DNA by polymerase chain reaction (PCR). The genomic DNA was extracted from hybridoma BDI-1 cells, which secreted a monoclonal antibody (mAb) against human bladder carcinoma. The primers contained special restriction sites that allowed the variable-region genes to be easily cloned for sequencing and expression. The recombinants were sequenced by Sanger's method. It was proved that the full lengths of the V H and V K genes were 366 and 324 bp, respectively. Compared with other published sequences, the V H gene was a member of mouse heavy-chain V H subgroup II and originated from the rearrangement of V H, Dsp2.2 and J H4. The V K gene was V K subgroup IV and from V K and J K4. The V H and V K genes was inserted expression vector pWAI80. By inducement, the ScFv antibodies were expressed and secreted from Escherichia coli. Binding activities against the bladder carcinoma cells were detected. We suggest that ScFv antibody recognized the antigen specifically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304776
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  • 8
    Electronic Resource
    Electronic Resource
    Somatic embryo formation and germination from immature embryo-derived suspension-cultured cells of Angelica sinensis (Oliv.) Diels (1998)
    Springer
    Plant cell reports 17 (1998), S. 670-674 
    Details
    ISSN: 1432-203X
    Keywords: Key wordsAngelica sinensis ; Immature embryo culture ; Somatic embryo ; Suspension cell culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Embryogenic callus was induced from immature embryos of Angelica sinensis cultured on Murashige and Skoog (MS) basal medium. Embryogenic callus growth was more rapid on MS basal medium than on B5 or White medium. Embryogenic callus was used to establish a suspension culture and somatic embryos and germinating embryos developed during the culture. A shaking speed of 80 rpm was found to be optimal for establishing suspension cultures, while 100 rpm produced more somatic embryos and germinating embryos with an initiation cell density of 0.2 ml packed cell volume/25 ml medium. Adding 0.3% agar to the liquid medium also stimulated the formation of somatic and germinating embryos. While no plant growth regulators were needed for culture initiation and plant regeneration, the addition of 0.5–1 mg/l 2,4-dichlorophenoxyacetic acid was needed to maintain the embryogenic suspension culture by preventing embryo germination. Forty percent of the germinating embryos survived after culturing on filter paper moistened with liquid half-strength MS medium containing 3% sucrose. The plants were successfully transferred into soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002990050463
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