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  • 1
    Electronic Resource
    Electronic Resource
    Effect of additive elements on magnetic properties and irreversible loss of hot-worked Nd-Fe-Co-B magnets : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 6049-6051 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: There has been limited work on the effects of alloying elements on the properties of hot-worked anisotropic magnets. The coercivity mechanisms for sintered and rapidly solidified Nd-Fe-B magnets are different, and additives can have different effects on magnetic properties. The present study was conducted to clarify the effects of various alloying elements on the properties of hot-worked magnets. Ribbons of composition (Nd13.6−xRx)(Fe77.6−yTyCo2.8)B6.0 (R=Ce and Dy; T=Al, V, Cu, Ga, Zr, Nb, Mo, and Sn; x=0, 1, and 2; y=0, 0.5, and 1.0) were prepared by melt spinning. Anisotropic magnets were made at 1073 K with 55.6% reduction in height by die upsetting. Room-temperature magnetic properties and irreversible losses after exposure at 323–473 K were determined. The results showed that small amounts of Al, V, Cu, and Ga enhanced the remanence of the magnets, while Dy, Al, Ga, Zr, Nb, and Mo improved the coercivity. Dy, Ga, and Mo additions were effective in increasing the heat resistance temperature (HRT), defined as the temperature where the irreversible loss is 3%. HRT is dependent on initial intrinsic coercivity and the squareness ratio (Hk/iHc) of the demagnetization curve. An equation relating these parameters is given. An HRT of 453 K was obtained with a suitable alloy composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347766
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  • 2
    Electronic Resource
    Electronic Resource
    Hot workability of melt-spun Nd-Fe-Co-B magnets : 35TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS San Diego, California (USA) 29 Oct−1 Nov 1990 (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5841-5843 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Anisotropic Nd-Fe-B magnets are produced from melt-spun ribbons by hot working technique. The processing is facilitated by improved workability. In order to obtain a sound magnet, it is important to suppress the crack initiation and growth. An investigation was carried out to study the deformation mechanism of the alloy system and to improve workability by changes in alloy composition. Alloy ribbons with composition (Nd13.6−xRx) (Fe77.6−y Ty Co2.8)B6.0 [R=Ce, Dy; T=Al, Si, V, Cu, Ga, Zr, Nb, Mo, Sn; x= 0, 1, 2; y=0, 0.5, 1.0] were prepared by melt spinning and then hot pressed into fully dense compacts. These compacts were upset in a hot working simulator. Hot workability was evaluated by measuring the crack opening displacement on the surface at the half height of the upset specimen. The relationship between strain rate and flow stress was found to be expressed by the equation: ε(overdot) = Aσn exp( − Q/RT). Values of n and Q were obtained for quarternary composition (Nd-Fe-Co-B). The effects of strain and strain rate on magnetic properties were also studied for quarternary composition. Of the additive elements, cerium and silicon addition showed significant improvement in workability without loss of coercivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347844
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of low-level boron doping on the photocurrent of amorphous silicon Schottky photodiodes (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 2307-2312 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have measured the photocurrent-electric field (Jph-F) characteristics of slightly boron (B) doped (0≤[B2H6]/[SiH4]≤10 ppm) amorphous silicon (a-Si:H) Schottky photodiodes with a configuration of Cr/a-Si:H/ITO. The measurements were performed with different bias directions and two light wavelengths (555 and 660 nm), and mobility-lifetime (μτ) products were deduced by two methods. One is by fitting the experimental plots to the theoretical curves developed by Crandall [Semiconductors and Semimetals (Academic, Orlando, FL, 1984), Vol. 21, Pt. B, p. 245.]. The other is a new one we have proposed where the transition electric field Ftr, at which Jph changes from space-charge-limited current to the theoretical curve given by Crandall, is applied to the relationship μτFtr=L, where L is the thickness of a-Si:H. It was found that the former method is applicable only where a-Si:H is homogeneously illuminated and no space charge is formed. On the other hand, the latter method is effective where a-Si:H is inhomogeneously illuminated and a space charge is formed in the carrier transit region. The μhτh deduced by the latter method increased from 2×10−9 to 3×10−8 cm2/V when the B-doping ratio was increased from 0 to 3 ppm, but remained nearly constant with further doping. In contrast, μeτe monotonically decreased from 2×10−8 to 2×10−9 cm2/V with increased doping. The (μτ)fit deduced by the former method coincides with the μhτh at doping ratios higher than 3 ppm, but did not at lower doping ratios probably because of a space-charge formation by deep hole trapping and incomplete homogeneous illumination. These changes in μτ are discussed microscopically in terms of the charge state of the dangling bond state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342845
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  • 4
    Electronic Resource
    Electronic Resource
    Time-differential perturbed-angular-correlation and emission Moessbauer studies on 99Ru dispersed in YBa2Cu3O6.8 and YBa2Cu3O6 (1995)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 99 (1995), S. 10629-10634 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100026a029
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  • 5
    Electronic Resource
    Electronic Resource
    Thyroid-adrenocortical responses to anaesthesia in man (1969)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 24 (1969), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1969.tb02800.x
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  • 6
    Electronic Resource
    Electronic Resource
    Human B-Cell Clones Expressing Lupus Nephritis-Associated Anti-DNA Idiotypes are Preferentially Expanded without Somatic Mutation (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 37 (1993), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Human monoclonal anti-single/double-stranded (ss/ds) DNA anlibodies (NE-1 and NE-13) expressed cross-reactive idiotypes (Id), NE-1 Id, which have been delected on the lupus glomeruli-deposited anti-DNA antibodies. The nucleotide sequences of the variable regions of NE-1 and NE-13 clones were analogous except for one nucleotide difference in the Vk region. The VH and Vk gene segments of NE-13 clone were identical with germline genes VH4.21 and Vb(or Vb′). respectively. CDR3sof NE-l and NE-13 heavy chains were arginine rich and CDR1s contained an amino acid stretch. SGYY, the inverted sequence of YYGS. which was shared among CDR3s of several anti-DNA antibodies. Clonal frequency analysis using a limiting dilution method revealed that NE-1 Id-positive clones at precursor cell level increased in lupus patients. These findings suggest that some IgM anti-DNA clones which express NE-1 Id associated with lupus nephritis use germline genes without mutation and they may be preferentially expanded at the precursor cell levels as well as at the mature cell level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1993.tb02569.x
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  • 7
    Electronic Resource
    Electronic Resource
    Parameterization of the CO2 and H2O gas exchange of several temperate deciduous broad-leaved trees at the leaf scale considering seasonal changes (2003)
    Oxford, UK : Blackwell Science, Ltd
    Plant, cell & environment 26 (2003), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A combined model to simulate CO2 and H2O gas exchange at the leaf scale was parameterized using data obtained from in situ leaf-scale observations of diurnal and seasonal changes in the CO2 and H2O gas exchange of four temperate deciduous broad-leaved trees using a porometric method. The model consists of a Ball et al. type stomatal conductance submodel [Ball, Woodrow & Berry, pp. 221–224 in Progress in Photosynthesis Research (ed. I. Biggins), Martinus-Nijhoff Publishers, Dordrecht, The Netherlands, 1987] and a Farquhar et al. type biochemical submodel of photosynthesis (Farquhar, von Caemmerer & Berry, Planta 149, 78–90, 1980). In these submodels, several parameters were optimized for each tree species as representative of the quantitative characteristics related to gas exchange. The results show that the seasonal physiological changes of Vcmax25 in the biochemical model of photosynthesis should be used to estimate the long-term CO2 gas exchange. For Rd25 in the biochemical model of photosynthesis and m in the Ball et al. type stomatal conductance model, the difference should be counted during the leaf expansion period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3040.2003.00960.x
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  • 8
    Electronic Resource
    Electronic Resource
    Distortion effect in ligands of polynuclear metal β-diketonates
    Amsterdam : Elsevier
    Inorganica Chimica Acta 101 (1985), S. L19-L20 
    Details
    ISSN: 0020-1693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0020-1693(00)85988-5
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  • 9
    Electronic Resource
    Electronic Resource
    Solvent extraction and spectrophotometric d.etermination of metals with 1 -(2-pyridylazo)-2-naphthol
    Amsterdam : Elsevier
    Analytica Chimica Acta 25 (1961), S. 348-359 
    Details
    ISSN: 0003-2670
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0003-2670(01)81576-2
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  • 10
    Electronic Resource
    Electronic Resource
    Human papillomaviruses of the mucosal type are present in some cases of extragenital Bowen's disease (2005)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 152 (2005), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background  Bowen's disease in the genital area is generally considered to be caused by mucosal high-risk human papillomaviruses (HPVs). However, the detection rate and spectrum of HPVs in extragenital Bowen's disease are various and it is not clear to what extent HPV is involved in its pathogenesis.Objectives  To assess the degree of association of HPV in extragenital cases by examining detection rates, types, quantities and localization of HPV.Methods  A polymerase chain reaction (PCR) approach that we had previously established, which can give sensitive detection of a broad range of HPVs from cutaneous [including epidermodysplasia verruciformis-related HPVs (EV-HPVs)] to mucosal HPVs, was applied to samples from 41 patients with extragenital Bowen's disease and normal skin samples from 48 individuals. Semiquantitative L1-PCR and tyramide-based in situ hybridization (ISH) were also employed for positive cases.Results  HPVs belonging to the mucosal high-risk group were detected in three patients with Bowen's disease (7%; two HPV 16 and one HPV 33), with 101−103 copy equivalents per diploid amount of cellular DNA. They were distributed among most nuclei of tumour cells but in none of the cells of adjacent normal skin. HPVs belonging to the cutaneous group were detected in two patients (5%; HPV 27 and HPV 76) at 10−2−10−3 copy equivalents, the same level as in a normal skin specimen positive for type 23 EV-HPV. No positive signals were observed by ISH.Conclusions  HPVs belonging to the mucosal high-risk group may participate in the development of extragenital Bowen's disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2005.06643.x
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