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  • 1
    Electronic Resource
    Electronic Resource
    Batchwise and flow-injection methods for thermo-spectrophotometric determination of acetylcholine and choline with tetrabromophenolphthalein ethyl ester
    Amsterdam : Elsevier
    Analytica Chimica Acta 255 (1991), S. 135-141 
    Details
    ISSN: 0003-2670
    Keywords: Acetylcholine ; Choline ; Extraction ; Flow system ; Spectrophotometry ; Thermochromism
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(91)85098-D
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  • 2
    Electronic Resource
    Electronic Resource
    Integration over positive matrices: Comparative analysis of the Penner model and its modification
    Amsterdam : Elsevier
    Nuclear Physics, Section B 430 (1994), S. 83-103 
    Details
    ISSN: 0550-3213
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0550-3213(94)90651-3
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  • 3
    Electronic Resource
    Electronic Resource
    Magnetic properties of R2Fe17−xGax compounds (R=Y, Ho) : The 6th joint magnetism and magnetic materials (MMM)−intermag conference (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 6740-6742 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Structural and magnetic properties of the R2Fe17−xGax compounds (R=Y, Ho, 0≤x≤6) have been investigated. All investigated Ho2Fe17−xGax compounds with x(approximately-greater-than)2.5 crystallize in the Th2Zn17-type structure and the others in the Th2Ni17-type structure. The substitution of Ga for Fe leads to an increase in lattice constants a, c, and unit-cell volume, a decrease of the average Fe moment, and a maximum of the Curie temperature as a function of the Ga concentration at x=3, for both Y2Fe17−xGax and Ho2Fe17−xGax compounds. The high magnetic field leads to a spin phase transition from the ferromagnetic to the canted phase. The critical field Bc of the transition decreases with increasing Ga concentration. The exchange interaction constants JTT between Fe–Fe spins and JRT between R–T spins have been derived from a mean field analysis of Curie temperature. It has been found that JTT increases at first, going through a maximum at x=3, then decreases with increasing x, whereas JRT is almost independent of the Ga content, which is consistent with the result obtained from a mean field analysis of the high field magnetization curves of the Ho2Fe17−xGax.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358147
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  • 4
    Electronic Resource
    Electronic Resource
    Model for calculating Tc of pluralistic magnetic component compounds (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 7456-7460 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A coupling model of the pluralistic magnetic component R-T intermetallic compounds (R denotes rare earth, T denotes transition metal) has been proposed by means of the mean-molecular-field analysis. Using the model, the Curie temperature Tc of (Sm1−xPrx)2Fe17 compounds has been calculated and the calculated values have been compared with the experimental values. It is found that the former are consistent with the later. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357973
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  • 5
    Electronic Resource
    Electronic Resource
    The magnetic properties of R2(Fe1−xSix)17 compounds (R=Dy, Y) (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 7452-7455 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The structures and magnetic properties of R2(Fe1−xSix)17 compounds (R=Dy, Y) were investigated by x-ray phase analysis and magnetic measurements. It is shown that Si substitution for Fe leads to a phase transition at x=0.2, and that the mean iron magnetic moment μFe of R2(Fe1−xSix)17 compounds (R=Dy, Y) decreases as Si concentration x increases; moreover, there is a maximum of dependence Tc(x) at about x=0.16. It is found that the exchange interaction constant AFeFe in R2(Fe1−xSix)17 compounds (R=Dy, Y) increases with x increasing by means of mean-molecular-field analysis of Tc. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357972
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  • 6
    Electronic Resource
    Electronic Resource
    Magnetic properties of (Er,R)2Fe17Ny compounds (R=Y,Gd) : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6238-6240 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Structural and magnetic properties of the interstitial (Er1−xRx)2Fe17Ny compounds with R=Y and Gd, x=0, 0.1, 0.25, 0.4, 0.5, 0.6, 0.75, and 1.0, 2〈y〈3, have been investigated. All the parent compounds crystallize in the Th2Ni17-type structure, except for Gd2Fe17 which crystallizes in the Th2Zn17-structure. All nitrides preserve the same structure as the parents. Introduction of nitrogen results in an increase in lattice constants a and c, and the expansion of unit-cell volume is about 6%. The Curie temperature was found to increase distinctly after nitrogenation. Nitrogen absorption leads to an increase in saturation magnetization, the values of the saturation magnetization increase monotonically with increasing Y or Gd concentration. Nitrogenation increases the uniaxial anisotropy of the Er sublattice, and causes a spin reorientation. The Y and Gd concentration dependencies of the spin reorientation temperature Tsr exhibit maxima. The tentative spin phase diagrams are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355410
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  • 7
    Electronic Resource
    Electronic Resource
    Si3N4/SiC interface structure in SiC-nanocrystal-embedded α-Si3N4 nanorods (2002)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 91 (2002), S. 1515-1519 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Si3N4/SiC interface structure in SiC-nanocrystal-embedded α-Si3N4 nanorods was studied by high-resolution transmission electron microscopy. The SiC-nanocrystal-embedded α-Si3N4 nanorods were synthesized by the method of carbothermal reduction of SiO in pure N2 atmosphere, while the SiC nanocrystals were produced from a substitution of SiC for Si3N4. Between SiC and Si3N4, there are three kinds of plane configurations and a set of orientation relationships, i.e., [11¯0]SiC//[0001]Si3N4 and nearly (111)SiC//(101¯0)Si3N4 with low-angle discrepancy of either 3° or 5°. The origin of the low-angle discrepancies was explained in terms of a reciprocal lattice theory for heteroepitaxial interfaces. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1428106
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  • 8
    Electronic Resource
    Electronic Resource
    Nanobelts of the dielectric material Ge3N4 (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 4565-4567 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ge3N4 nanobelts 30–300 nm in width were synthesized by thermal reduction of a mixed Ge+SiO2 powder in NH3 atmosphere. These nanobelts were studied by high-resolution transmission electron microscope equipped with an x-ray energy dispersive spectrometer. In these synthesized nanobelts, the existence of α and β phases of Ge3N4 was identified. The α phase exhibiting slight difference from an ideal α-Ge3N4 phase was also found in the present Ge3N4 material. The mechanism of formation of the Ge3N4 nanobelts is discussed. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1428634
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  • 9
    Electronic Resource
    Electronic Resource
    Immunohistochemical demonstration of bone morphogenetic protein in odontogenic tumors (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 26 (1997), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The aim of the present study was to describe the expression and distribution of bone morphogenetic protein (BMP) in odontogenic tumors by immunohistochemistry using monoclonal antibody against bovine BMP (BMPMcAb). Eight types of odontogenic tumors (44 cases), including ameloblastoma (20 cases), cementifying fibroma (8 cases), benign cementoblastoma (5 cases), dentinoma (3 cases), compound odontoma (2 cases), adenomatoid odontogenic tumor (2 cases), calcifying epithelial odontogenic tumor (2 cases) and odontogenic fibroma (2 cases), were studied. The results showed that, according to the immunostaining pattern of BMPMcAb, tumors could be classified into two types: all cementifying fibro-mas, benign cementoblastomas. Dentinomas, odontogenic fibromas. and compound odontomas demonstrated a positive reaction, whereas all ameloblastomas, adenomatoid odontogenic tumors, and calcifying epithelial odontogenic tumors were negative. BMPMcAb-positive odontogenic tumors were those tumors with formation of enamel, dentin, cementum or bone. Therefore. BMP might play an important role in the formation of calcified dental tissues and the development of odontogenic tumors contaning such tissues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.1997.tb01236.x
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