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  • 1
    Electronic Resource
    Electronic Resource
    Microwave study of Nd0.7Sr0.3MnO3 thin film resistivity (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 3749-3752 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on microwave studies of Nd0.7Sr0.3MnO3 thin film losses in a shielded TE011 dielectric cavity. The cavity quality (Q) factor and resonant frequency are measured as a function of temperature with the dielectric cavity loaded with a thin film on a LaAlO3 substrate. A reference Q measurement is then made without the film enabling the extraction of the film-Q factor Qfilm. Here the temperature dependence of the Q factor is discussed in terms of resistive losses in the thin film. A numerical finite difference time domain code is then used to extract the microwave resistivity as a function of temperature from the measured Q factors. The numerical method involves the discretization of Maxwell's equations on an axisymmetric space-time grid coupled to a discrete Fourier transform to determine the resonant frequency. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.369743
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  • 2
    Electronic Resource
    Electronic Resource
    Characterization of ferromagnetic perovskites for magnetically tunable microwave superconducting resonators (2002)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 91 (2002), S. 5384-5390 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An investigation of electrical, magnetic, and microwave properties is presented for Nd1−xSrxMnO3−y (NSMO) thin films. The NSMO thin films were deposited on (100)-oriented LaAlO3 substrates using both high-pressure sputtering and laser-ablation methods. Several films with different doping concentration ranging from 0.17 to 0.33 were tested for microwave loss and their frequency dependence on the dc magnetic field. The films exhibited Curie temperatures ranging from 220 to 60 K, and saturation magnetization from 0.3 to 0.1 T. The feasibility of applications of magnetic perovskites for magnetic tuning of resonators is analyzed and discussed. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1459600
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation of Y-Ba-Cu-O high Tc superconducting thin films by plasma-assisted organometallic chemical vapor deposition (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 194-196 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films of the high Tc superconducting Y-Ba-Cu metal oxide have been prepared for the first time by plasma-assisted organometallic chemical vapor deposition using β-diketonate chelates of Y, Ba, and Cu, Y(C11H19O2)3, Ba(C11H19O2)2, and Cu(C11H19O2)2 as starting materials, followed by post-annealing under a reduced pressure of oxygen stream. X-ray diffraction spectra indicate that the films deposited on the yttria-stabilized zirconia (YSZ) substrate have a significant preferential orientation of the crystallite c axis being perpendicular to the substrate surface. Four-probe resistivity measurements reveal the temperature of the onset of superconductivity at 91.6 K and zero resistance by 78.5 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.102404
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of columnar defects on surface resistance of YBa2Cu3Ox superconducting thin films; nonlinear effects (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 1781-1783 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on measurements of surface resistance (Rs) of YBa2Cu3Ox thin films irradiated with 0.9 GeV Pb ions. Measurements of Rs versus microwave-frequency (rf) magnetic field and temperature were carried out using a dielectric resonator technique. At low temperatures, no significant difference was observed between surface resistance of irradiated and nonirradiated films. However, at higher temperatures the irradiated films exhibited not only higher Rs but also a nonlinear dependence of Rs on rf magnetic field. A simple model for microwave losses in thin superconducting films induced by columnar defects is proposed. Using this model, the observed changes in Rs have been attributed to additional losses and/or heating effects in the insulator-superconductor boundary between an amorphous core of the columnar defects (several nanometers in diameter) and the surrounding superconducting material. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.124818
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  • 5
    Electronic Resource
    Electronic Resource
    Microwave characterization of Nd0.67Sr0.33MnO3−x thin films for magnetically tunable filters (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 74 (1999), S. 750-752 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on the microwave properties of Nd0.67Sr0.33MnO3−x (NSMO) and NSMO/YBa2Cu3O7−x thin film heterostructures. The quality factor (Q) and center frequency of a 13 GHz shielded dielectric cavity resonator, with the film comprising one surface, were measured as functions of temperature and direct current magnetic field. The Q versus field data was theoretically simulated using the Landau–Lifschitz–Gilbert dynamic permeability equation thus demonstrating that the microwave losses are determined by the ferromagnetic properties of the films. Our results indicate that the field-dependent permeability μ(B) of NSMO films holds the potential to create magnetically tunable microwave devices. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.123191
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  • 6
    Electronic Resource
    Electronic Resource
    Spectroscopic analysis and persistent photon-gated spectral hole burning in LiF:F2− color center crystal (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 2318-2320 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Luminescence and absorption spectra of LiF crystals with F2− color centers (CCs) were studied in the 14–300 K temperature range. The Huang–Rhys factors measured from absorption and emission spectra were equal in magnitude and calculated to be 3.2 and 2.72 at 77 and 300 K, respectively. It was shown that below 40 K inhomogeneous broadening of the zero phonon line of the F2− CC prevails over homogeneous broadening. Inhomogeneous broadening of the zero phonon line was observed to vary from 5 to 15 cm−1 for different crystal preparations. Persistent spectral hole burning stable at room temperature was realized in LiF:F2− crystals. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1406563
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  • 7
    Electronic Resource
    Electronic Resource
    Antimicrobial activity of Ginkgo biloba leaf extract on Listeria monocytogenes (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 68 (2003), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : The antimicrobial activities of Ginkgo biloba leaf extract (GBE) and the combined effects of GBE and sodium EDTA (sodium Ethylenediaminetetraacetic acid) against Listeria monocytogenes were determined at 4 °C, 25 °C, and 37 °C. Listeria monocytogenes grown at 37 °C for 24 h was inoculated (6 to 7 log CFU/mL) into BHI broth containing either GBE or GBE and EDTA (1.6 mg/mL) with various GBE concentrations of 0.1, 0.25, 0.5, 1, 2.5, 5.0, 7.5, 10.0, 15.0, or 20.0% vol/vol and stored at 4 °C, 25 °C, and 37 °C. The inhibitory effect of the GBE was more pronounced at low temperature of 4 °C. GBE was effective in inhibiting microbial growth. Addition of EDTA enhanced antimicrobial activity of GBE.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2003.tb14150.x
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  • 8
    Electronic Resource
    Electronic Resource
    Edible Film Coating to Minimize Eggshell Breakage and Reduce Post-Wash Bacterial Contamination Measured by Dye Penetration in Eggs (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : The mechanical and bacterial barrier properties of washed (tap water, sodium carbonate, Na2CO3, sodium hypochlorite, NaOCl) noncoated eggs and eggs coated with soy protein isolate (SPI), whey protein isolate (WPI), carboxylmethyl cellulose (CMC), or wheat gluten (WG) were evaluated. All coated eggshells showed greater puncture strength than those of noncoated eggs. The film-coated eggs reduced post-wash bacterial penetration as measured by dye penetration method. WPI coating completely inhibited blue dye penetration on average. These results suggest that WPI coatings can be used to reduce breakage of eggshell and egg microbial contamination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb11398.x
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  • 9
    Electronic Resource
    Electronic Resource
    Conversion of Isoflavone Glycosides to Aglycones in SoyLife and Soymeal Using β-glycosidase (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 68 (2003), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : Conversion of isoflavones from glycosides to aglycones in SoyLife and soymeal using varying concentrations of β-glycosidase, and different pH conditions and temperatures was investigated. The best conditions for the conversion of glycosides to aglycones were pH 5.0, 50 °C, and 5 h incubation with 5 units β-glycosidase/g Soy Life and 1.5 units/g soymeal. Under these conditions, the amount of genistein, daidzein, and glycitein in Soy Life treated with β-glycosidase were 4.22, 11.52, and 11.85 μmol/g compared to untreated controls of 0.26, 0.97, and 4.43 μmol/g, respectively. In soymeal, the amounts were 3.21, 2.02, and 2.12 μmol/g compared to untreated controls of 1.23, 1.25, and 1.51 μmol/g, respectively. Mole percent recovery of genistein was 87% in Soy Life and 80% in soymeal, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2003.tb05689.x
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  • 10
    Electronic Resource
    Electronic Resource
    Application of molecular modeling to the study of polymer electrolytes
    Amsterdam : Elsevier
    Solid State Ionics 60 (1993), S. 19-28 
    Details
    ISSN: 0167-2738
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-2738(93)90269-9
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