14,759 research outputs found

    Smarandachely t-path step signed graphs

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    Characterizing signed graphs which are switching equivalent to their Smarandachely 3-path step signed graphs

    Superconductivity in doped FeTe1-xSx (x= 0.00 to 0.25) single crystals

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    We report self flux growth and characterization of FeTe1-xSx (x= 0.00 to 0.25) single crystal series. Surface X-ray diffraction (XRD) exhibited crystalline nature with growth in (00l) plane. Micro-structural (electron microscopy) images of representative crystals showed the slab-like morphology and near stoichiometric composition. Powder XRD analysis (Rietveld) of single crystals exhibited tetragonal structure with P4/nmm space group and decreasing a and c lattice parameters with increase in x. Electrical resistivity measurements (R-T) showed superconductivity with Tconset at 9.5K and 8.5K for x =0.10 and x =0.25 respectively. The un-doped crystal exhibited known step like anomaly at around 70K. Upper critical field Hc2(0), as calculated from magneto transport for x =0.25 crystal is around 60Tesla and 45Tesla in H//ab and H//c directions. Thermal activation energy [U0(H)] calculated for x =0.10 and 0.25 crystals followed weak power law, indicating single vortex pinning at low fields. Mossbauer spectra for FeTe1-xSx crystals at 300K and 5K are compared with non superconducting FeTe. Both quadrupole splitting (QS) and isomer shift (IS) for S doped crystals were found to decrease. Also at 5K the hyperfine field for x =0.10 superconducting crystal is decreased substantially from 10.6Tesla (FeTe) to 7.2Tesla. For x =0.25 crystal, though small quantity of un-reacted Fe is visible at room temperature, but unlike x =0.10, the low temperature (5K) ordered FeTe hyperfine field is nearly zero.Comment: 20 Pages Text + Figs: Accepted Mat. Res. Exp, Mat. Rex. Exp. (2018

    Photon temporal modes: a complete framework for quantum information science

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    Field-orthogonal temporal modes of photonic quantum states provide a new framework for quantum information science (QIS). They intrinsically span a high-dimensional Hilbert space and lend themselves to integration into existing single-mode fiber communication networks. We show that the three main requirements to construct a valid framework for QIS -- the controlled generation of resource states, the targeted and highly efficient manipulation of temporal modes and their efficient detection -- can be fulfilled with current technology. We suggest implementations of diverse QIS applications based on this complete set of building blocks.Comment: 17 pages, 13 figure

    Evaluation of heterosis through combining ability in pearl millet. I. Single crosses

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    Evaluation of heterosis through combining ability in pearl millet. II. Multiple crosses

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    EVALUATION OF CARDIO PROTECTIVE ACTIVITY OF GALANGIN AGAINST DOXORUBICIN INDUCED CARDIOMYOPATHY

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    Objective: The present study was designed to investigate the cardioprotective potential of Galangin on Doxorubicin induced cardiotoxicity in rats. Methods: Albino rats used in this experiment were pretreated with vehicle, Galangin (100 & 200µg/kg) and Vit-C (20 mg/kg) for 28 days. On 25th day, a single dose of Doxorubicin (10 mg/kg, i. p) was administered to groups. After 72 h of Doxorubicin administration, ECG, serum and tissues biomarkers were evaluated. Histopathological examination of the heart was performed. Results: Doxorubicin treated rats exhibited abnormal ECG pattern followed by significant increase in CK-MB, LDH, SGOT, SGPT and LPO level and decrease in GSH, CAT, TT when compared to control rats. Pretreatment with different doses of Galangin and Vit-C significantly reduced the serum biomarkers and increased the tissue antioxidant level when compared to Doxorubicin alone treated groups. Moreover, pretreatment also improved Doxorubicin induced changes in ECG pattern and histopathology of heart. Conclusion: We conclude that the present study provides experimental evidence that Galangin has strong antioxidant activity, and it can maintain cell membrane integrity, and ameliorate oxidative stress induced by high-dose of Doxorubicin administration. These findings might be helpful to understand the beneficial effects of Galangin against myocardial injury although further study is needed to confirm its mechanism
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