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Sample records for brilliant sm eu

  1. Brilliant Sm, Eu, Tb and Dy chiral lanthanide complexes withstrong circularly polarized luminescence

    Energy Technology Data Exchange (ETDEWEB)

    Petoud, Stephane; Muller, Gilles; Moore, Evan G.; Xu, Jide; Sokolnicki, Jurek; Riehl, James P.; Le, Uyen; Cohen, Seth M.; Raymond,Kenneth N.

    2006-07-10

    The synthesis, characterization and luminescent behavior of trivalent Sm, Eu, Dy and Tb complexes of two enantiomeric, octadentate, chiral, 2-hydroxyisophthalamide ligands are reported. These complexes are highly luminescent in solution. Functionalization of the achiral parent ligand with a chiral 1-phenylethylamine substituent on the open face of the complex in close proximity to the metal center yields complexes with strong circularly polarized luminescence (CPL) activity. This appears to be the first example of a system utilizing the same ligand architecture to sensitize four different lanthanide cations and display CPL activity. The luminescence dissymmetry factor, g{sub lum}, recorded for the Eu(III) complex is one of the highest values reported, and this is the first time the CPL effect has been demonstrated for a Sm(III) complex with a chiral ligand. The combination of high luminescence intensity with CPL activity should enable new bioanalytical applications of macromolecules in chiral environments.

  2. Burnup measurement and its relation to the amounts of 149Sm and 150Sm and the ratios of 154Eu/155Eu and 154Eu/152Eu in spent fuel of a power reactor

    International Nuclear Information System (INIS)

    The amounts of 148Nd, 149Sm and 150Sm by the isotope dilution mass spectrography and the ratios of 154Eu/155Eu and 154Eu/152Eu by the γ-spectrography in the spent fuel of a power reactor have been measured. The amouns of 150Sm is directly proportional to that of 148Nd and burnup can be determined by 150Sm. Relation of the ratios of 154Eu/155Eu with respect to the burnup is plotted

  3. Orange and reddish-orange light emitting phosphors: Sm3+ and Sm3+/Eu3+ doped zinc phosphate glasses

    International Nuclear Information System (INIS)

    A spectroscopy study of Sm3+ and Sm3+/Eu3+ doped zinc phosphate glasses is performed through photoluminescence spectra and decay time profile measurements. Under Sm3+ excitation at 344 nm, the Sm3+ singly doped glass shows an orange global emission with x=0.579 and y=0.414 CIE1931 chromaticity coordinates, whereas the Sm3+/Eu3+ co-doped sample exhibits orange overall emissions (x=0.581 and y=0.398, and x=0.595 and y=0.387) and reddish-orange overall emission (x=0.634 and y=0.355) upon excitations at 344, 360 and 393 nm, respectively. Such luminescence from the co-doped sample is originated by the simultaneous emission of Sm3+ and Eu3+. Under Sm3+ excitation at 344 and 360 nm, the Eu3+ emission is sensitized and enhanced by Sm3+ through a non-radiative energy transfer process. The non-radiative nature was inferred from the shortening of the Sm3+ lifetime observed in the Sm3+/Eu3+ co-doped sample. An analysis of the Sm3+ emission decay time profiles using the Inokuti–Hirayama model suggests that an electric quadrupole–quadrupole interaction into Sm–Eu clusters might dominate the energy transfer process, with an efficiency of 0.17. - Highlights: • Zinc phosphate glasses are optically activated with Sm3+/Eu3+ (ZPOSmEu). • Non-radiative energy transfer Sm3+→Eu3+ takes place in ZPOSmEu. • ZPOSmEu overall emission can be modulated with the excitation wavelength. • ZPOSmEu might be useful as orange/reddish-orange phosphor for UV-white LEDs

  4. Luminescence and energy transfer of Sm3+ and Eu3+ in Ca2PO4Cl

    International Nuclear Information System (INIS)

    Sm3+, Eu3+, and Sm3+–Eu3+ doped Ca2PO4Cl phosphors are synthesized by a solid-state method. Ca2PO4Cl:Sm3+ can produce red emission under the 400 nm radiation excitation, and the emission peak is located at 601 nm, which is assigned to the 4G5/2→6H7/2 transition of Sm3+. Ca2PO4Cl:Eu3+ can create red emission under the 392 nm radiation excitation, and the strongest peak is located at 620 nm, which is attributed to the 5D0→7F2 transition of Eu3+. The energy transfer from Sm3+ to Eu3+ in Ca2PO4Cl has been validated and the critical distance (Rc) of Sm3+ to Eu3+ in Ca2PO4Cl is calculated to be 1.14 nm. With increasing Eu3+ doping concentration, the energy transfer efficiency (Sm3+→Eu3+) gradually increases to 53.7%. The luminescence property of Ca2PO4Cl:Sm3+, Eu3+ can be tuned by properly tuning the relative ratio of Sm3+–Eu3+, and the emission intensity of Ca2PO4Cl:Eu3+ can be greatly enhanced by codoped Sm3+. - Highlights: • Ca2PO4Cl:Sm3+, Eu3+ can produce red emission under the 400 nm radiation excitation. • The energy transfer from Sm3+ to Eu3+ in Ca2PO4Cl has been validated. • The critical distance of Sm3+ to Eu3+ in Ca2PO4Cl is calculated to be 1.14 nm

  5. Shape tunable synthesis of Eu- and Sm-doped ZnO microstructures: a morphological evaluation

    Indian Academy of Sciences (India)

    Gautam Sheel Thool; M Arunakumari; Ajaya Kumar Singh; Surya Prakash Singh

    2015-10-01

    Facile and low-cost aqueous chemical bath deposition route has been demonstrated to fabricate Eu- and Sm-doped ZnO microstructures. The effect of Eu and Sm ions on the morphology of the ZnO was investigated. The synthesized doped ZnO microstructures were systematically characterized by field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman and Fourier transform infrared spectra. FESEM images depicted the formation of Eu-doped ZnO microsphere and Sm-doped ZnO microplates. XRD spectra showed single crystalline nature of the undoped ZnO microdisks, whereas Eu- and Sm-doped ZnO exhibited the polycrystalline nature. The presence of Eu and Sm ions in the ZnO matrix was confirmed by XPS. This means that all the Eu ions substituted Zn2+ as Eu2+ into the ZnO matrix, whereas most of Sm ions were being in the trivalent state. This was probably due to the segregation of Sm2O3 species on the surface of ZnO microstructures.

  6. Orange and reddish-orange light emitting phosphors: Sm{sup 3+} and Sm{sup 3+}/Eu{sup 3+} doped zinc phosphate glasses

    Energy Technology Data Exchange (ETDEWEB)

    Meza-Rocha, A.N., E-mail: ameza@fis.cinvestav.mx [Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, P.O. Box 55-534, 09340 México D.F., México (Mexico); Speghini, A. [Dipartimento di Biotecnologie, Universita di Verona and INSTM, UdR Verona, Strada Le Grazie 15, I-37314 Verona (Italy); IFAC CNR, Nello Carrara Institute of Applied Physics, MDF Lab, I-50019 Sesto Fiorentino, FI (Italy); Bettinelli, M. [Dipartimento di Biotecnologie, Universita di Verona and INSTM, UdR Verona, Strada Le Grazie 15, I-37314 Verona (Italy); Caldiño, U. [Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, P.O. Box 55-534, 09340 México D.F., México (Mexico)

    2015-11-15

    A spectroscopy study of Sm{sup 3+} and Sm{sup 3+}/Eu{sup 3+} doped zinc phosphate glasses is performed through photoluminescence spectra and decay time profile measurements. Under Sm{sup 3+} excitation at 344 nm, the Sm{sup 3+} singly doped glass shows an orange global emission with x=0.579 and y=0.414 CIE1931 chromaticity coordinates, whereas the Sm{sup 3+}/Eu{sup 3+} co-doped sample exhibits orange overall emissions (x=0.581 and y=0.398, and x=0.595 and y=0.387) and reddish-orange overall emission (x=0.634 and y=0.355) upon excitations at 344, 360 and 393 nm, respectively. Such luminescence from the co-doped sample is originated by the simultaneous emission of Sm{sup 3+} and Eu{sup 3+}. Under Sm{sup 3+} excitation at 344 and 360 nm, the Eu{sup 3+} emission is sensitized and enhanced by Sm{sup 3+} through a non-radiative energy transfer process. The non-radiative nature was inferred from the shortening of the Sm{sup 3+} lifetime observed in the Sm{sup 3+}/Eu{sup 3+} co-doped sample. An analysis of the Sm{sup 3+} emission decay time profiles using the Inokuti–Hirayama model suggests that an electric quadrupole–quadrupole interaction into Sm–Eu clusters might dominate the energy transfer process, with an efficiency of 0.17. - Highlights: • Zinc phosphate glasses are optically activated with Sm{sup 3+}/Eu{sup 3+} (ZPOSmEu). • Non-radiative energy transfer Sm{sup 3+}→Eu{sup 3+} takes place in ZPOSmEu. • ZPOSmEu overall emission can be modulated with the excitation wavelength. • ZPOSmEu might be useful as orange/reddish-orange phosphor for UV-white LEDs.

  7. Excited states in the neutron deficient nuclei 138Sm and 139Eu

    International Nuclear Information System (INIS)

    Excited states in the two N=76 nuclei 138Sm and 139Eu have been identified via 32S induced reactions on different targets using γ-ray spectroscopy methods. Lifetimes have been measured with the Doppler shift recoil distance technique, showing the coexistence of a large nuclear deformation (β-0.24) with excitations of single particle character. The E2 transition strengths in the odd-even nucleus 139Eu and in its core 138Sm are discussed. (orig.)

  8. Photostimulable SrS:Eu,Sm phosphor as a storage material for two-dimensional X-ray image sensor

    International Nuclear Information System (INIS)

    In this paper, we report the first observation of intense PSL in Eu and Sm co-doped SrS (SrS;Eu,Sm) phosphor at room temperature (RT) and the PSL characteristics of SrS:Eu,Sm phosphor as a storage material for two-dimensional imaging sensor for the electromagnetic waves such as X-ray. (J.P.N.)

  9. Electrical properties of EuO,90Sm0,10O films on silicon substrate

    International Nuclear Information System (INIS)

    The films of rare earth oxides Eu0.90Sm0.10O on silicon substrate are prepared and their electric properties are studied. The films were prepared by the method of thermal evaporation in the ligature vacuum of the Eu0.90Sm0.10 composition with the following oxidation. Film thickness is 200-300 am. Magnetic susceptibility x was measured for the above films of the Eu0.90Sm0.10O composition on the silicon substrate by the method of escape of generator oscillation frequency when the sample is placed inside the coil of the resonance circuit which permit to estimate the value of the actual part of complex magnetic susceptibility

  10. The second 2+ state in 144Sm and the decay of 144Eu

    International Nuclear Information System (INIS)

    The positron decay of 144Eu is reinvestigated using beta- and gamma-ray spectroscopy techniques. A decay scheme comprising three excited states and four transitions in 144Sm is constructed. Three new transitions are observed and have led to the establishment of a second 2+ state populated in this decay. The half-life of 144Eu has been accurately measured to be 10.2 +- 0.1 s. Spin-parity assignments are made to all the levels involved in the decay. The structure of 144Sm is discussed in the light of different models. (orig.)

  11. Energy transfer from Sm3+ to Eu3+ in red-emitting phosphor LaMgAl11O19:Sm3+, Eu3+ for solar cells and near-ultraviolet white light-emitting diodes.

    Science.gov (United States)

    Min, Xin; Huang, Zhaohui; Fang, Minghao; Liu, Yan-Gai; Tang, Chao; Wu, Xiaowen

    2014-06-16

    The red-emitting phosphor LaMgAl11O19:Sm(3+), Eu(3+) was prepared by solid-state reaction at 1600 °C for 4 h. The phase formation, luminescence properties, and energy transfer from Sm(3+) to Eu(3+) were studied. With the addition of 5 mol % Sm(3+) as the sensitizer, the excitation wavelength of LaMgAl11O19:Eu(3+) phosphor was extended from 464 to 403 nm, and the emission intensity under the excitation at 403 nm was also enhanced. The host material LaMgAl11O19 could contain the high doping content of Eu(3+) (20 mol %) without concentration quenching. This energy transfer from Sm(3+) to Eu(3+) was confirmed by the decay times of energy donor Sm(3+). The mechanism of energy transfer (Sm(3+) → Eu(3+)) was proved to be quadrupole-quadrupole interaction. Under the 403 nm excitation at 150 °C, the emission intensities of the characteristic peaks of Sm(3+) and Eu(3+) in LaMgAl11O19:0.05Sm(3+), 0.2Eu(3+) phosphor were decreased to 65% and 56% of the initial intensities at room temperature, and the relatively high activation energy proved that this phosphor had a good thermal stability. The CIE coordinate was calculated to be (x = 0.601, y = 0.390). The LaMgAl11O19:0.05Sm(3+), 0.2Eu(3+) phosphor is a candidate for copper phthalocyanine-based solar cells and white light-emitting diodes. PMID:24884208

  12. Development of biomimetic coatings on Sm oxide doped ELB (Eu-Li-borate) glasses

    International Nuclear Information System (INIS)

    The in-vitro biomineralization of Eu/Li-borate glasses containing Sm2O3 was investigated by immersion in simulated body fluid (SBF) up to 72 h. Back scattering scanning electron microscope supplemented with EDX was used to follow the development of the phosphatic layer post 72 h SBF immersion. Biochemical analyses of calcium and inorganic phosphorus (Ca2+ and iP) ions were conducted using relevant biochemical kits and spectrophotometer. Spectra of TF-X-ray analyses and Fourier transform infrared were obtained for the samples post 72 h immersion and compared to the host one. The role of Sm2O3 in the biomineralization and crystallinity of the (ELB) borate glasses is proved by the developed rounded nano particles and the presence of elemental Eu and Sm in the formed layer beside Ca and P as presented by EDX. The continuous reduced values of ionic iP accompanying the adsorption and release of Ca ions in SBF with time assured the biolayer formation. The formed phosphatic layer presented shifted XRD peaks due to ionic incorporations especially of Sm3+. FT-IR proved the selectivity of BO3 group for phosphatic deposition. Deconvolution of ν4 and ν3 regions, for carbonates and phosphates, respectively, proved the enhanced peak areas with increased Sm3+ content.

  13. Structural and luminescence studies on Eu3+ and Sm3+ doped zinc-leadborate glasses

    International Nuclear Information System (INIS)

    The present work reports structural and luminescence studies on (50-x)B2O3+ 20PbO+20ZnO+ 10Sr2O+xR2O3 (where x=0.1, 1 and R=Sm3+, Eu3+) zinc-leadborate glasses. Structural analysis of the prepared glasses have been carried out using XRD, FTIR and Raman spectra. The optical absorption and photoluminescence spectra of the Eu3+ and Sm3+ doped glasses were investigated using the Judd-Ofelt (JO) theory. The XRD spectra reveal the amorphous nature of the prepared glasses. The fundamental stretching vibrations of the various borate networks have been identified and reported through the FTIR spectra. Raman spectra are used to analyse the information about the structural units and local arrangements in the host matrix

  14. N=90 region: The decays of $^{152m,g}$Eu to $^{152}$Sm

    CERN Document Server

    Kulp, W D; Eimer, J; Furse, D; Krane, Kenneth S; Larimer, R M; Loats, J; Norman, E B; Piechaczek, A; Schmelzenbach, P; Stapels, C J; Wood, J L

    2006-01-01

    The decays of $^{152m,g}$Eu $\\to ^{152}$Sm have been studied by $\\gamma$-ray spectroscopy using the $8\\pi$ Spectrometer, an array of 20 Compton-suppressed Ge detectors. Very weak $\\gamma$-decay branches in $^{152}$Sm were investigated through $\\gamma - \\gamma$ coincidence spectroscopy. All possible $E2$ transitions between states below 1550 keV with transition energies $> 130$ keV are observed, including the previously unobserved $2^+_3 \\to 0^+_2$ 401 keV transition. The results, combined with existing lifetime data, provide a number of new or revised $E2$ transition strengths which are critical for clarifying the collective structure of $^{152}$Sm and the N=90 isotones.

  15. Thermographic properties of Eu3+ and Sm3+ doped Lu2O3 nanophosphor

    Directory of Open Access Journals (Sweden)

    Dramićanin Miroslav D.

    2012-01-01

    Full Text Available The samples, Lu2O3:Eu3+ (3at.% Eu and Lu2O3:Sm3+ (1at.% Sm, were prepared via polymer complex solution method using polyethlylene-glyocol as the fuel and as nucleation agent for crystallization process. Knowing that lutetium oxide has high chemical stability and temperature resistance, in this paper we investigated possibility for its application in high-temperature phosphor thermometry. It is a non-contact technique that uses the thermal dependence of phosphor fluorescence to measure temperature remotely. The structural and morphological properties were performed through X-ray powder diffraction (XRPD and transmission electron microscopy (TEM investigations. The obtained results confirmed that this synthesis yields desired crystalline structure with particle size in the range from 30 to 50 nm. Photoluminescence emission measurements were recorded in the temperature range from room up to 873 K. The accomplished results demonstrate the performance of Eu3+ and Sm3+ doped Lu2O3 as high temperature thermographic phosphors of very good sensitivity. [Projekat Ministarstva nauke Republike Srbije, br. 45020 i br. 171022

  16. Sm isotope composition and Sm/Eu ratio determination in an irradiated 153Eu sample by ion exchange chromatography-quadrupole inductively coupled plasma mass spectrometry combined with double spike isotope dilution technique

    International Nuclear Information System (INIS)

    Within the framework of the research undertaken by the French Atomic Energy Commission on transmutation of long-lived radionuclides, targets of highly enriched actinides and fission products were irradiated in the fast neutron reactor Phenix. Precise and accurate measurements of the isotopic and elemental composition of the enriched elements are therefore required. In order to obtain the uncertainties of several per mil and to reduce handling time and exposure to analyst on radioactive material, the on-line coupling of ion exchange chromatography with quadrupole inductively coupled plasma mass spectrometry has been associated with the technique of the double spike isotope dilution. We present in this paper the results obtained on an irradiated sample of Europium oxide powder (enriched at 99.13% in 153Eu). After irradiation of around 5 mg of Eu2O3 powder the theoretical calculations predict the formation of several micrograms of gadolinium and samarium isotopes. In relation to the very high activity of the sample after irradiation and the very low quantity of Sm formed, the on-line ion exchange chromatography separation of Gd, Sm and Eu before Sm isotope ratio measurements has been developed for the quantification of the 152Sm/153Eu ratio. These on-line measurements were associated with the double spike isotope dilution technique after calibration of a 147Sm/151Eu spike solution. The external reproducibility of Sm isotopic ratios was determined to be around 0.5% (2 σ) resulting in a final uncertainty on the 152Sm/153Eu ratio of around 1% (2 σ). These on-line measurements present therefore a robust and high-throughput alternative to the thermal-ionisation mass spectrometry technique used so far in combination with off-line chromatographic separation, particularly in nuclear applications where characterisation of high activity sample solutions is required. (authors)

  17. Recent progress on compositional nanostripes of REBa2Cu3O7-δ (RE = Sm,Eu,Gd) superconductors

    International Nuclear Information System (INIS)

    We characterized ordered compositional fluctuation in high-quality SmBa2Cu3O7-δ, (Sm0.5Eu0.5)Ba2Cu3O7-δ, and (Sm0.33Eu0.33Gd0.33)Ba2Cu3O7-δ superconductors by atomic force microscopy, scanning tunnelling microscopy, and transmission electron microscopy. The presence of nanostripes along the crystalline c direction was confirmed in SmBa2Cu3O7-δ single crystals and in melt-processed (Sm0.5Eu0.5)Ba2Cu3O7-δ, (Sm0.33Eu0.33Gd0.33)Ba2Cu3O7-δ materials. Meanwhile, thickness fringes originating from the twin boundaries were also identified in some samples; these could be clearly separated from real nanostripes with sample tilting. Compositional nanostripes displayed spatial variation in both shape and wavelength over a large area of RE-Ba-Cu-O single domains. The origin of the nanostripe is discussed in the context of the competitive growth mechanism of RE1+xBa2-xCu3O7-δ solid solution

  18. Synthesis of LiMgPO4:Eu,Sm,B phosphors and investigation of their optically stimulated luminescence properties

    International Nuclear Information System (INIS)

    LiMgPO4:Eu,Sm,B phosphors were synthesized using a solid-state diffusion synthesis method. Their optically stimulated luminescence (OSL) properties for real-time dosimetry were investigated, including thermoluminescence (TL), OSL emission spectrum, OSL dose response, OSL stimulation time and the reproducibility of the OSL signal. The LiMgPO4:Eu,Sm,B phosphors exhibited high sensitivity to ionizing radiation, excellent signal stability for the tested period (up to 12 cycles) and a broad range of linear dose response (>0.1–540 Gy). The excellent luminescent and dosimetric properties of these LiMgPO4:Eu,Sm,B phosphors make them promising candidates for real-time dosimeters with increased therapeutic efficacy and minimal toxicity. - Highlights: • A novel OSL material of LiMgPO4:Eu,Sm,B phosphor is proposed for real-time dosimetry. • LiMgPO4:Eu,Sm,B(LMP) exhibits good linearity in the dose range of 0.1–540 Gy. • LMP was found to be about 5 times that of LiMgPO4:Tb,B in 0.1 Gy. • LMP exhibits a main TL peaks around 354 °C

  19. Photoluminescence properties of Eu(3+)/ Sm(3+) activated CaZr4(PO4)6 phosphors.

    Science.gov (United States)

    Nair, Govind B; Dhoble, S J

    2016-09-01

    Solid state reaction method was employed for the synthesis of a series of CaZr4(PO4)6: Eu(3+)/Sm(3+) phosphors. The red-emitting CaZr4(PO4)6:Eu(3+) phosphors can be efficiently excited at 396 nm and thereby, exhibit a strong red luminescence predominantly corresponding to the electric dipole transition at 615 nm. Under 405 nm excitation, CaZr4(PO4)6:Sm(3+) phosphors display orange emission with color temperatures approximately around 2200 K. The acquired results reveal that CaZr4(PO4)6: RE(3+) (RE = Eu, Sm) phosphors could be potential candidates for red and orange emitting phosphor, respectively, for UV/blue-pump LEDs. PMID:27411525

  20. Physical properties of the R3Pt23Si11 compounds with volatile rare earth: Sm, Eu, Tm and Yb

    International Nuclear Information System (INIS)

    The new R3Pt23Si11 series, where R is a rare earth, has been completed with the synthesis of three new compounds with volatile rare earth: R=Eu, Sm, and Tm. The studies of their physical properties have been performed along with those of the Yb3Pt23Si11 compound. The X-ray powder diffraction patterns confirm that they all crystallize in the same face-centered cubic structure, space group Fm3¯m, as the rest of the series. The refinements of the diffraction patterns show an anomalously high lattice parameter in Eu3Pt23Si11 and Yb3Pt23Si11, indicating a divalent valence state for Eu and Yb. This 2+ valence state for Eu and Yb ions is confirmed by the magnetic measurements. A ferromagnetic order is observed at TC=5.54±0.07 K and 10.12±0.07 K in Eu3Pt23Si11 and Sm3Pt23Si11 respectively. In Tm3Pt23Si11 no magnetic order is found down to 0.36 K while Yb3Pt23Si11 reveals a diamagnetic behavior. At low temperatures the spontaneous moment, Ms, in Eu3Pt23Si11 is in agreement with a L=0, S=7/2 state for the Eu2+ ion. On the contrary in Sm3Pt23Si11, Ms is far below the 0.714μB expected for the saturated moment of the Sm3+ in the J=7/2 ground state multiplet. - Highlights: • R3Pt23Si11 with volatile rare earth Sm, Eu, Tm and Yb have been synthesized. • Structural studies confirm that they crystallize in the same structure as Ce3Pt23Si11. • For Eu- and Yb-3Pt23Si11 a divalent valence state is found for Eu and Yb. • Eu- and Sm-3Pt23Si11 present a ferromagnetic order at 5.54 K and 10.12 K respectively. • In Tm3Pt23Si11 no magnetic order is found down to 0.36 K, Yb3Pt23Si11 is diamagnetic

  1. Photoluminescence characteristics of reddish-orange Eu{sup 3+} or Sm{sup 3+} singly-doped and Eu{sup 3+} and Sm{sup 3+} co-doped KZnGd(PO{sub 4}){sub 2} phosphors

    Energy Technology Data Exchange (ETDEWEB)

    Jeong, Jun Ho; Bandi, Vengala Rao; Grandhe, Bhaskar Kumar; Jang, Ki Wan; Lee, Ho Sueb [Changwon National University, Changwon (Korea, Republic of); Yi, Soung Soo [Silla University, Busan (Korea, Republic of); Jeong, Jung Hyun [Pukyong National University, Busan (Korea, Republic of)

    2011-02-15

    Eu{sup 3+} or Sm{sup 3+} singly-doped and Eu{sup 3+} and Sm{sup 3+} co-doped KZnGd(PO{sub 4}){sub 2} phosphors were synthesized by using a conventional solid state reaction method at 750 .deg. C. The emission spectra of KZnGd{sub 1-x}(PO{sub 4}){sub 2}:Eu{sup 3+}{sub x} with {lambda}{sub ex} = 395 nm and KZnGd{sub 1-y}(PO{sub 4}){sub 2}:Sm{sup 3+}{sub y} with {lambda}{sub ex} = 403 nm phosphors showed intense {sup 5}D{sub 0} {yields} {sup 7}F{sub 1}, {sup 4}G{sub 5/2} {yields} {sup 6}H{sub 7/2} emission transitions at 595 nm and 599 nm, respectively. The optimum relative intensity of the KZnGd{sub 1-x-y}(PO{sub 4}){sub 2}:Eu{sup 3+}{sub x} , Sm{sup 3+}{sub y} phosphor was obtained for the doping concentrations of (x = 0.09, y = 0.01). In addition, the temperature dependent luminescence intensity of the synthesized phosphors was investigated and the thermal stability of the KZnGd(PO{sub 4}){sub 2}:Eu{sup 3+} phosphor was found to be higher than that of standard YAG:Ce{sup 3+} and KZnGd{sub 1-x-y}(PO{sub 4}){sub 2}:Eu{sup 3+}{sub x} Sm{sup 3+}{sub y} under near ultra-violet (NUV) light emitting diode excitation (LED). Therefore, we suggest that Eu{sup 3+} or Sm{sup 3+} singly-doped and Eu{sup 3+} and Sm{sup 3+} co-doped KZnGd(PO{sub 4}){sub 2} phosphors should be efficient for different red-color-emitting display device applications and NUV-LED-based white-light-emitting diodes.

  2. Luminescence properties of LiY{sub 6}O{sub 5}(BO{sub 3}){sub 3}:Eu{sup 3+}/Sm{sup 3+} phosphor

    Energy Technology Data Exchange (ETDEWEB)

    Wen, Qing; Xiang, Zhifeng; Gao, Xuejun; Yang, Xiaoliang, E-mail: xiaoliangy@xtu.edu.cn; Xiao, Siguo

    2015-07-15

    Highlights: • Method for preparing pure LiY{sub 6}O{sub 5}(BO{sub 3}){sub 3} powder is developed. • Eu{sup 3+}, Sm{sup 3+} co-doped LiY{sub 6}O{sub 5}(BO{sub 3}){sub 3} powder gives strong red emission. • Co-doped Sm{sup 3+} ions broaden excitation band without changing color index. - Abstract: Eu{sup 3+}, Sm{sup 3+} single-doped and co-doped LiY{sub 6}O{sub 5}(BO{sub 3}){sub 3} phosphors are prepared by a high-temperature solid-state reaction method. The Eu{sup 3+}-doped and Sm{sup 3+}-doped phosphors give bright red emission centered at 613 and 604 nm under 395- and 406-nm excitation, respectively, while the Eu{sup 3+}, Sm{sup 3+} co-doped phosphor just gives Eu{sup 3+}-characterized emission whether excited by 395 or 406 nm. This indicates that the co-doped Sm{sup 3+} ions can broaden the excitation band of the phosphor without changing its color index, which might match better with the near-ultraviolet (NUV) chips in white light-emitting diode (W-LED) application. The Sm{sup 3+}-concentration-dependent luminescence properties ascribed to the energy transfer between Eu{sup 3+} and Sm{sup 3+} is discussed.

  3. Synthesis and photoluminescence properties of novel red-emitting Ca14Mg2(SiO4)8:Eu3+/Sm3+ phosphors

    Institute of Scientific and Technical Information of China (English)

    孙文芝; 庞然; 李海锋; 贾永雷; 张粟; 姜丽宏; 李成宇

    2015-01-01

    Novel red-emitting Eu3+, Sm3+ singly doped and co-doped Ca14Mg2(SiO4)8 phosphors were prepared by conventional solid- state reaction. Powder X-ray diffraction patterns were employed to confirm phase purity. Ca14Mg2(SiO4)8:Eu3+ phosphors exhibited intense red emission under 394 nm excitation and Ca14Mg2(SiO4)8:Sm3+ phosphors, excited at 405 nm, also showed strong red emit-ting at 602 nm. The concentration quenching mechanism of Ca14Mg2(SiO4)8:Eu3+ was dipole-dipole interaction, while that of Ca14Mg2(SiO4)8:Sm3+ was energy migration among nearest neighbor ions. The results indicated that Ca14Mg2(SiO4)8:Eu3+ and Ca14Mg2(SiO4)8:Sm3+ were promising red-emitting phosphors for WLEDs. Meanwhile, the effect of co-doping Sm3+ ions on photo-luminescence properties of Ca14Mg2(SiO4)8:Eu3+ was studied and energy transfer from Sm3+ to Eu3+ was discovered in Eu3+, Sm3+ co-doped phosphors.

  4. RE/ZrO{sub 2} (RE = Sm, Eu) composite oxide nano-materials: Synthesis and applications in photocatalysis

    Energy Technology Data Exchange (ETDEWEB)

    Du, Weimin, E-mail: duweimin75@gmail.com [College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455002 (China); Zhu, Zhaoqiang [College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455002 (China); College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan 450001 (China); Zhang, Xiaofen; Wang, Dacheng; Liu, Donghe [College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455002 (China); Qian, Xuefeng [School of Chemistry and Chemical Technology, Shanghai Jiao Tong University, Shanghai 200240 (China); Du, Jimin, E-mail: djm@aynu.edu.cn [College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455002 (China)

    2013-10-15

    Graphical abstract: - Highlights: • RE/ZrO{sub 2} (RE = Sm, Eu) nano-materials have been successfully synthesized. • Defect and electron structures determine the absorption properties on visible light. • Nano-sized Zr{sub 0.8}Sm{sub 0.2}O{sub 2−δ} has good visible-light-responsive photocatalytic activities. • In the future, it can be used in wastewater treatment and environmental protection. - Abstract: Zirconia modified by Samarium/Europium, RE/ZrO{sub 2} (RE = Sm, Eu), composite oxide nano-materials have been successfully synthesized by improved sol–gel method. Characterization results show that X-ray diffraction (XRD) peaks of products gradually shift to the lower angle with the increase of rare earth which implies that the lattice distances of RE/ZrO{sub 2} nano-materials are gradually enlarged. Moreover, the molar ratios between zirconium and rare earth are consistent with the chemical formula and both of them are uniformly distributed in samples. Optical properties indicate that defect structures and electron configurations of RE/ZrO{sub 2} (RE = Sm, Eu) with single phase determine their absorption properties on visible light. Photocatalytic experiments indicate Zr{sub 0.8}Sm{sub 0.2}O{sub 2−δ} nano-crystals have excellent visible-light-responsive photocatalytic activities on Methylene blue and Rhodamine B which results from the special defect structure, suitable electronic configuration, and larger specific surface area. It follows that Zr{sub 0.8}Sm{sub 0.2}O{sub 2−δ} nano-crystals are new visible-light-responsive photocatalysts which can be applied in dye wastewater treatment and environmental protection in the future.

  5. Crystal structure of the RLiGe2 (R=La,Ce,Pr,Nd,Sm,Eu) compounds

    International Nuclear Information System (INIS)

    Crystal structure of RLiGe2 compounds is determined by the method of monocrystal and powder. Lattice periods specified according to diffraction pattern (DRON)-3, CuKα-radiation) are equal to a=0.7815(3), b=0.3965(2), c1.0748(4) nm (for CeLiGe2 compound), sp. gr. Pnma. The structure was interpreted by SM-4 computer. Divergency factor for 154 hkl reflexes equals 0.117. The structure belongs to CaZiGe2 structural type. Isostructural CeLiGe2 compounds form with La, Pr, Nd, Sm, Eu

  6. A series of color tunable yellow-orange-red-emitting SrWO4:RE (Sm3+, Eu3+-Sm3+) phosphor for near ultraviolet and blue light-based warm white light emitting diodes

    Science.gov (United States)

    Ren, Yandong; Liu, Yonghao; Yang, Rui

    2016-03-01

    A series of wide-range-tunable light emissive SrWO4:Sm3+, SrWO4:Sm3+,Eu3+ phosphors were synthesized via the simple co-precipitation method. The charge compensation can greatly improve SrWO4: Sm3+ phosphors luminous intensity. The critical distance, ηT and energy transfer mechanism of SrWO4:0.01Sm3+,0.12Eu3+ were studied. These obtained phosphors exhibit a high luminous efficiency, purity and lower color temperature of the comfortable warm white LEDs. Hues varying have been generated by appropriately tuning the Sm3+ ions concentration, excitation wavelength or Sm3+, Eu3+ co-doping, which have the color tunable wide gamut light covering the yellow-green, greenish-yellow, yellow, yellow orange, orange, reddish orange and red chromaticity region. In particular, SrWO4:0.01Sm3+,0.12Eu3+ phosphors excited at 404 and 480 nm have higher color saturation than commercially available Y2O2S:Eu3+ red phosphor. These phosphors can be excited efficiently using commercial ultraviolet, blue laser diodes and LEDs, and can be used for developing new color light sources, fluorescent display devices, ultraviolet-sensors and tunable visible lasers.

  7. Temperature dependence of volumetric electroluminescence intensity of ZnS-Cu crystals doped with Sm, Eu, Pb or Tm

    International Nuclear Information System (INIS)

    The current-brightness characteristic of volume luminescence of ZnS-Cu crystals doped with Sm, Eu and Pb become more sloping with the increasing temperature, while of the Tm-doped ZnS-Cu, on the contrary, rises more steeper. In every case this can be explained by the change of ionization rate with temperature on the basis of the earlier developed theory provided that the differences in numerical values of some parameters of these crystals are taken into account

  8. Sol-gel method for preparing a novel red-emitting phosphor YVO4:Sm3+, Eu3+ with ideal red color emission

    Science.gov (United States)

    Xia, Siyu; Guan, Anxiang; Chen, Peican; Wang, Guofang; Geng, Yue; Zhou, Liya

    2016-09-01

    A series of novel color-tunable phosphors YVO4:Sm3+, Eu3+ was synthesized using a sol-gel method. The crystal structure and photoluminescence properties of the synthesized phosphors were measured and analyzed. By changing the ratio of Sm3+-Eu3+, the color of these phosphors can be changed from orange to red. This phenomenon was closely related to the energy transfer from Sm3+ to Eu3+, and analysis demonstrated that the energy-transfer mechanism arose from quadrupole-quadrupole interaction, with a critical distance of about 10.28 Å. The Commission International deL'Eclairage value of YVO4:0.05Sm3+, 0.11Eu3+ enabled the achievement of the standard red coordinates (0.67, 0.33). All these results indicated that the red phosphors can be used as a red component of white-light-emitting diodes.

  9. Emission analysis of RE3+ (RE=Eu, Sm, Dy):MgY4Si3O13 phosphors

    International Nuclear Information System (INIS)

    A series of Eu3+, Sm3+, and Dy3+ ion doped magnesium yttrium silicate [MgY4Si3O13] phosphors was synthesized using the solid-state reaction method with a grain size of approximately 500 nm in hexagonal symmetry. The photoluminescence (PL) spectra of the Eu3+, Sm3+, and Dy3+:MgY4Si3O13 phosphors exhibit bright red, orange-red and yellow emissions at 615 nm (5D0→7F2), 603 nm (4G52→6H7/2), and 574 nm (4F9/2→6H13/2), respectively. The thermoluminescence (TL) of the phosphors displays the maximum intensity consistently at 10 mol% of the ion concentrations, with a single glow peak around 165 °C (Eu3+-activated phosphor), 230 °C (Sm3+-activated phosphor), and 230 °C (Dy3+-activated phosphor), respectively. The trap parameters such as the order of kinetics (b), activation energy (E), frequency factor (S), and Balarin parameter (γ) associated with the most intensive glow peak of these phosphors were finally determined by analyzing their line-shapes on the basis of Chen's method

  10. Design of a novel optically stimulated luminescent dosimeter using alkaline earth sulfides doped with SrS:Eu,Sm materials

    Institute of Scientific and Technical Information of China (English)

    Yanping Liu; Zhaoyang Chen; Yanwei Fan; Weizhen Ba; Wu Lu; Qi Guo; Shilie Pan; Aimin Chang; Xinqiang Tang

    2008-01-01

    Optically stimulated luminescence (OSL) is the luminescence emitted from an irradiated insulator or semiconductor during exposure to light.The OSL intensity is a function of the dose of radiation absorbed by the sample and thus can be used as the basis of a radiation dosimetry method.Alkaline earth sulfides doped with rare-earth elements such as Ce,Sm and Eu are OSL dosimeters having very high sensitivity,and the OSL with a short time constant is separated from the stimulated light.In this paper,a novel OSL dosimeter designed with SrS:Eu,Sm materials is described.The dosimeter takes advantage of the characteristics of charge trapping materials SrS:Eu,Sm that exhibit OSL.The measuring range of the dosimeter is from 0.01 to 100Gy.The equipment,which is relatively simple and small in size,is promising for applications in space exploration and high dose radiation dosimetry.

  11. The luminescence properties of Bi3+ sensitized Gd2MoO6:RE3+ (RE = Eu or Sm) phosphors for solar spectral conversion

    Science.gov (United States)

    Huang, M. N.; Ma, Y. Y.; Huang, X. Y.; Ye, S.; Zhang, Q. Y.

    2013-11-01

    Gd2MoO6:RE3+ (RE = Eu or Sm) and Gd2MoO6:Bi3+, RE3+ (RE = Eu or Sm) phosphors have been synthesized by combustion method. The samples are characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), photoluminescence excitation (PLE) and photoluminescence (PL) spectra. By introducing Bi3+ ions into Gd2MoO6:RE3+ (RE = Eu or Sm) phosphors, the excitation bands of Eu3+ and Sm3+ ions are broadened and shifted to short wavelength, meanwhile, the emission intensity are enhanced obviously. The energy transfer from Bi3+ to the activators of Eu3+ or Sm3+ is observed and discussed. In addition, the process of ultraviolet light (250-400 nm) converted into visible light can be achieved by using Gd2MoO6:Bi3+, RE3+ (RE = Eu or Sm) phosphor. These phosphors can be a promising ultraviolet-absorbing luminescent converter to enhance the photoelectrical conversion efficiency of dye-sensitized solar cells (DSSCs).

  12. Spectroscopic properties of rare-earth (Eu{sup 3+}, Sm{sup 3+}) doped BaWO{sub 4} powders

    Energy Technology Data Exchange (ETDEWEB)

    Bouzidi, C., E-mail: bouzidtc@yahoo.fr [Laboratoire de Physico-chimie des Matériaux Minéraux et leurs Applications, Centre National des Recherches en Sciences des Matériaux, BP No.73, 8027 Soliman (Tunisia); Ferhi, M. [Laboratoire de Physico-chimie des Matériaux Minéraux et leurs Applications, Centre National des Recherches en Sciences des Matériaux, BP No.73, 8027 Soliman (Tunisia); Elhouichet, H. [Laboratoire de Physico-chimie des Matériaux Minéraux et leurs Applications, Centre National des Recherches en Sciences des Matériaux, BP No.73, 8027 Soliman (Tunisia); Département de Physique, Faculté des Sciences de Tunis, Université de Tunis-ElManar, ElManar 2092, Tunis (Tunisia); Ferid, M. [Laboratoire de Physico-chimie des Matériaux Minéraux et leurs Applications, Centre National des Recherches en Sciences des Matériaux, BP No.73, 8027 Soliman (Tunisia)

    2015-05-15

    BaWO{sub 4} powders doped with rare-earth ions (RE=Eu, Sm) have been prepared by the solid state reaction method at 1100 °C. The structural and optical properties have been investigated by XRD and photoluminescence (PL) measurements, respectively. The results revealed that BaWO{sub 4} powders crystallize in the tetragonal structure and exhibit a good crystallinity. Based on emission spectra, the Judd–Ofelt parameters Ω{sub 2}, Ω{sub 4} of (Eu, Sm) doped BaWO{sub 4} have been calculated. The Ω{sub 2} and Ω{sub 4} parameters have been used to calculate the total transition probabilities (A{sub T}), the stimulated emission cross-sections (σ{sub e}), the fluorescence branching ratio (β{sub R}) and radiative lifetimes (τ{sub R}) of the {sup 5}D{sub 0} level. The measured lifetimes (τ{sub mes}) were compared to the calculated (τ{sub R}) using the J–O method. The energy transfer has been investigated from the excitation spectra. The results show a broadening of the excitation bands at 396 and 465 nm of BaWO{sub 4} codoped Sm{sup 3+} and Eu{sup 3+} compared to BaWO{sub 4} doped Eu{sup 3+}. The photoluminescence (PL) intensity, the luminescence decay and the quantum efficiency (η) of {sup 5}D{sub 0}→{sup 7}F{sub 2} transition increase after adding Sm{sup 3+}. It is found that Sm{sup 3+} ion acts as sensitizer for Eu{sup 3+} ion and contributes largely to the improvement of the spectroscopic properties of BaWO{sub 4}:Eu{sup 3+}. We show that excitation transfer can occur from Sm{sup 3+} to Eu{sup 3+}. Compared to reported materials, the radiative properties obtained for {sup 5}D{sub 0}→{sup 7}F{sub 2} transition (616 nm) indicate that the present sample is promising host material for Eu{sup 3+} doped fiber amplifiers. - Highlights: • Eu{sup 3+} or/and Sm{sup 3+}:BaWO{sub 4} were prepared by the solid state reaction method. • Spectroscopic properties of BaWO{sub 4}:Eu{sup 3+} were improved by adding Sm{sup 3+}. • The energy transfer process between Eu

  13. Luminescence of Eu(III), Pr(III) and Sm(III) in carbonate-fluor-apatite

    International Nuclear Information System (INIS)

    The purpose of this work was identification of luminescent lines occurring in natural carbonate-fluor-apatite (francolite) mineral. For identification of several rare earth ions occurring in natural francolite, the luminescence of rare earth ions was extensively studied in artificial mineral consisting of pure francolite (not containing rare earth) of the composition Ca5(PO4)3(F,O):Ca5(PO4)3CO3 activated with Pr, Eu and Sm ions and then compared with the luminescence features observed in natural mineral. (author)

  14. Determination of Gd, Sm, Eu and Dy in uranium compounds by atomic absorption spectrophotometry using a graphite furnace

    International Nuclear Information System (INIS)

    The separation of Gd, Sm, Eu and Dy from uranium and its determination by graphite furnace atomic absorption spectrophotometry is outlined. The lanthanides were separated by means of the percolation of the uranyl nitrate solution 0,3 M in HF (50-250g of U3O8 perliter) through an Al2O3 column. The lanthanides retained in the column were eluted with 1M HCl. As thorium is also retained into the column under these conditions, its interference was studied. The determination limits of the method range from 0,01 to 0,1 μg of lanthanide per gram of uranium. (Author)

  15. Measurement of reactivity worths of Sm, Cs, Gd, Nd, Rh, Eu, B and Er aqueous solution samples

    Energy Technology Data Exchange (ETDEWEB)

    Komuro, Yuichi; Suzaki, Takenori; Sakurai, Kiyoshi; Horiki, Oichiro [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment; Ohtomo, Shoichi

    1997-11-01

    From the view point of burnup credit for spent fuels, it remains as an important issue to validate nuclear data of fission products. Aiming to obtain benchmark data for that purpose, reactivity worths of Sm, Cs, Gd, Nd, Rh and Eu aqueous solution samples of various concentrations were measured by the critical-water-level method at Tank-type Critical Assembly (TCA). Samples of B and Er were included for the purpose of comparison. Neutron activation distributions of Au wires crossing the sample region were also measured in several cases. A linear correlation was found between the thermal neutron flux peakings in the sample region and the reactivity worths. (author)

  16. Luminescent properties and energy transfer process of Sm3+-Eu3+ co-doped MY2(MoO4)4 (M=Ca, Sr and Ba) red-emitting phosphors

    Science.gov (United States)

    Ye, Menglin; Zhou, Gaojian; Zhou, Liqun; Lu, Di; Li, Yue; Xiong, Xing; Yang, Kunzhou; Chen, Menghuan; Pan, Yaxi; Wu, Peng; Wang, Zheng; Liu, Hongying; Xia, Qinghua

    2016-09-01

    MY2(MoO4)4:Sm3+ and MY2(MoO4)4:xSm3+,yEu3+ (M=Ca, Sr and Ba) phosphors were successfully prepared using solid-state reaction route, and their luminescent properties and energy transfer process from Sm3+ to Eu3+ were systematically investigated. The results indicate that MY2(MoO4)4:Sm3+ phosphors can be effectively excited by 407 nm near UV light originating from the 6H5/2 → 4F7/2 transition of Sm3+, and exhibit a satisfactory red emission at 646 nm attributed to the 4G5/2 → 6H9/2 transition of Sm3+, in which the emission intensity of SrY2(MoO4)4:Sm3+ is the strongest among the MY2(MoO4)4:Sm3+ (M=Ca, Sr and Ba) phosphors. For Eu3+ co-doped MY2(MoO4)4:Sm3+ samples, with increasing Eu3+ doping content, the main emission peaks of Sm3+ (approximately 646 nm) are decreased, but the emission peaks and intensity of Eu3+ are increased while the maximum intensity of luminescence at the Eu3+ concentration 0.9. The introduction of Eu3+ in the MY2(MoO4)4:Sm3+ phosphors can remarkably generate a strong emission line at 616 nm, originating from the 5D0→7F2 transition of Eu3+ and Sm3+ (4G5/2) → Eu3+ (5D0) effective energy transfer process. The energy transfer mechanism from Sm3+ to Eu3+ was discussed in detail.

  17. Synthesis of nanocrystalline REBO3 (RE=Y, Nd, Sm, Eu, Gd, Ho) and YBO3:Eu using a borohydride-based solution precursor route

    International Nuclear Information System (INIS)

    A solution precursor route has been used to synthesize a series of nanocrystalline rare-earth borates. Amorphous precursor powders are precipitated during an aqueous reaction between RE3+ and NaBH4, and the isolated powders can be annealed in air at 700 deg. C to form YBO3, NdBO3, SmBO3, EuBO3, GdBO3, and HoBO3. YBO3:Eu formed using this strategy shows red-orange emission properties that are similar to high-quality nanocrystals prepared by other methods. The materials have been characterized by FTIR spectroscopy, powder XRD, SEM, DSC, UV-Vis fluorimetry, and TEM with EDS and element mapping. - Graphical abstract: Amorphous nanoscopic precursor powders are formed through the aqueous reaction of RE3+ with NaBH4. Once isolated, the powders can be annealed at 700 deg. C in air to form a series of nanocrystalline REBO3 orthoborates. Nanocrystalline YBO3:Eu formed using this strategy shows red-orange emission properties when excited with UV light

  18. Variable Emission Changes in Bi3+/Ln3+ (Ln = Eu, Sm, Dy) Co-doped Lutetium Vanadates (LuVO4)

    Science.gov (United States)

    Zheng, Yuhui; Hu, Jing; Deng, Surong; Gao, Jinwei; Wang, Qianming

    2016-06-01

    High-purity LuVO4: Ln3+/Bi3+ (Ln = Eu, Sm, Dy) phosphors with tetragonal zircon structures were successfully synthesized. The reactions have been carried out by multiple irradiations with very high efficiency. Transmission electron microscope images showed that the phosphors had rod-like structures with average lengths of about 200 nm. The host absorption edge of LuVO4: Ln3+/Bi3+ (Ln = Eu, Sm) shifted to the longer wavelength side. Furthermore, the red emission of Eu3+ ion and the orange emission of Sm3+ ion are remarkably enhanced by encapsulating Bi3+ in LuVO4 system, whereas in the case of LuVO4: Dy3+/Bi3+, the host absorption and the yellow emission from dysprosium have been suppressed in the presence of Bi3+. These novel findings will facilitate their use in the display field.

  19. Photoluminescence properties and energy transfer of Ca{sub 3}WO{sub 6}:Sm{sup 3+} co-doped Eu{sup 3+}

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Shaoan; Hu, Yihua; Chen, Li; Wang, Xiaojuan; Ju, Guifang; Fan, Yan [Guangdong University of Technology, School of Physics and Optoelectronic Engineering, Guangzhou (China)

    2014-06-15

    A reddish-orange phosphor, Ca{sub 3}WO{sub 6}:Sm{sup 3+}, was synthesized by the convenient solid-state reaction method and characterized by X-ray diffraction (XRD). Photoluminescence properties and concentration quenching of Ca{sub 3}WO{sub 6}:Sm{sup 3+} phosphor have been discussed in the excitation and emission spectra. Ca{sub 3}WO{sub 6}:Sm{sup 3+} phosphor is able to generate a strong excitation peak, which matches the emission wavelength from near-UV LEDs. Energy transfer from Sm{sup 3+} to Eu{sup 3+} in Ca{sub 3}WO{sub 6} host is observed and investigated in detail. The chromaticity coordinates of Ca{sub 3}WO{sub 6}:Sm{sup 3+} can be regulated to approach the NTSC standard values of red phosphor by codoping Eu{sup 3+} ions. The photoluminescence properties suggest that novel Ca{sub 3}WO{sub 6}:Sm{sup 3+}, Eu{sup 3+} phosphor might have a potential application for near-UV LEDs. (orig.)

  20. Synthesis and fluorescence properties of Eu(Ⅲ), Tb(Ⅲ) and Sm(Ⅲ) with β-diketone and 2,2'- bipyridine

    Institute of Scientific and Technical Information of China (English)

    LIU Xingwang; JIANG Jiadong; YONG Shengli; GUO Yuwei; YANG Kun; WANG Li

    2012-01-01

    Three new rare earth ternary complexes,RE(PPP)3bpy (RE=Sm3+,Eu3+,Tb3+),were synthcsized by the reaction of 1-phenyl-3-(p-phenylethynylphenyl)-1,3-propanedione (HPPP) and 2,2'-bipyridine(bpy) with rare earth chloride RECl3,respectively,in alcohol solution.The compositions were characterized by means of infrared (IR) spectra,chemical analysis,elemental analysis,and thermodynamic analysis.Luminescent properties of the three complexes were studied.At room temperature,under UV light excitation,the Sm3+,Eu3+ and Tb3+ complexes exhibited characteristic emission of the central ions.The fluorescence spectra showed that the fluorescence emission intensity of Eu3+ complex was the strongest.The narrow strongest emission band of Eu3+ complex was considered to be a valuable material with bright red fluorescence.

  1. Stabilization of anatase phase in the rare earth; Eu and Sm ion doped nanoparticle TiO{sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Setiawati, E. [Department of Electronic Engineering, University of Electro-Communications, Chofugaoka 1-5-1 Chofu, Tokyo 182-8585 (Japan); Kawano, K. [Department of Electronic Engineering, University of Electro-Communications, Chofugaoka 1-5-1 Chofu, Tokyo 182-8585 (Japan)], E-mail: kawano@ee.uec.ac.jp

    2008-02-28

    The extension of temperature range of anatase phase for nanoparticle TiO{sub 2} has been achieved by doping the rare earth; Sm and Eu ions, respectively. The TiO{sub 2} films and nanoparticles were prepared from Ti-(IV)-isopropoxide (TTIP) based on the sol-gel method at the varied sintering temperature from 400 to 950 deg. C for 1 h. The powder X-ray diffraction (XRD) spectra revealed significantly delaying of the phase transition from anatase to rutile by RE ions doping. The film morphology by atomic force microscopy (AFM) for doped films showed reduction of particle sizes as well as formation of uniform films. According to the structural studies, it is concluded that the RE ions has influenced greatly on the stabilization of anatase phase.

  2. Improving luminescent property of SrIn2O4:Eu3+ by co-doped A+ (A =Li, Na, K) or Sm3+*

    Institute of Scientific and Technical Information of China (English)

    Wang Zhi-Jun; Li Pan-Lai; Yang Zhi-Ping; Guo Qing-Lin

    2013-01-01

    A series of SrIn2O4:Eu3+ phosphors are synthesized by a high temperature solid-state method,and their luminescent properties are investigated.They can be excited by 395-nm radiation,and produce red emission (619 nm); however,they have a low absorption of near-ultraviolet light with the wavelength of 400 nm-405 nm.When co-doped with A+ (A =Li,Na,K),the emission intensity of SrIn2O4:Eu3+ is significantly enhanced,but its emission and excitation spectral profile is unchanged.With co-doping Sm3+,not only is the emission intensity of SrIn2O4:Eu3+ enhanced,but also the absorption is broadened and strengthened in the range of 400 nm-405 nm.The effect of Sm3+-doped content on the emission intensity of SrIn2O4:Eu3+,Sm3+ is investigated,and the optimal Sm3+ content is 0.02 mol.

  3. Crossrelaxations and non-radiative energy transfer from (4G5/2) Sm3+ → (5D0) Eu3+: B2O3–ZnO glasses

    International Nuclear Information System (INIS)

    Graphical abstract: The energy transfer process occurring from Sm3+ to Eu3+ in B2O3–ZnO (BZn) glasses is analyzed. Based on the Foster–Dexter theory, the possibility of energy transfer between Sm3+ and Eu3+ has been demonstrated from the spectral overlap of Eu3+ absorption and Sm3+ emission, photoluminescence spectra, energy level diagram and lifetime measurements. The energy transfer mechanism in (Sm3+ + Eu3+) co-doped glass is governed by dipole–dipole interaction. - Highlights: • Spectroscopic properties of individually doped Sm3+, Eu3+ & co-doped (Sm3+ + Eu3+) in BZn glasses were studied separately. • The effect of Eu3+ concentration on luminescence properties is explained from cross-relaxations. • Energy transfer from Sm3+ (4G5/2) to Eu3+ (5D0) has been explained from Foster–Dexter theory. • Dipole–dipole mechanism governs the energy transfer from Sm3+ to Eu3+. - Abstract: The present paper reports on the results concerning to photoluminescence features of Eu3+, Sm3+ ions and energy transfer process occurring from Sm3+ to Eu3+ doped in 45 B2O3–55 ZnO (BZn) glasses prepared by melt quenching technique. Luminescence quenching as a function of Eu3+ concentration in BZn glasses has been discussed. Among the studied concentrations, 0.5 mol% of Eu3+ is optimized because it has exhibited red emission transition 5D0 → 7F2. With regard to Sm3+ glasses, orange emission at 602 nm (4G5/2 → 6H7/2) has been noticed on exciting with λexci = 403 nm. Based on the Foster–Dexter theory, the possibility of energy transfer between Sm3+ and Eu3+ has been explained from the spectral overlap of Eu3+ absorption and Sm3+ emission. The optimized concentration 0.5 mol% of Eu3+ is co-doped with Sm3+ in various concentrations ranging from 0.1 to 1.5 mol% inorder to study the sensitization effect of Sm3+ on Eu3+ luminescence. The results have revealed that with the addition of Sm3+ to Eu3+: BZn glass, emission intensity of Eu3+ has been enhanced due to migration

  4. High-Pressure Rare Earth Disilicates REE2Si 2O 7( REE=Nd, Sm, Eu, Gd): Type K

    Science.gov (United States)

    Fleet, Michael E.; Liu, Xiaoyang

    2001-10-01

    A new structure type (K) is reported for the disilicates of Nd, Sm, Eu, and Gd made at high pressure. Crystals of type K were synthesized at 10 GPa, 1600-1700°C in an MA6/8 superpress and used for single-crystal X-ray structure study by Kappa CCD diffractometry at room temperature. Crystal data are: monoclinic, space group P21/n, Z=4; Nd2Si2O7-a=6.6658(2), b=6.7234(3), c=12.3975(6) Å, β=102.147(3)°, V=543.2 Å3, R=0.029, and Dx=5.584 g/cm3; Sm2Si2O7-a=6.6039(3), b=6.6849(3), c=12.3069(5) Å, β=102.489(3)°, V=530.4 Å3, R=0.038, and Dx=5.871 g/cm3; Eu2Si2O7-a=6.5777(3), b=6.6652(4), c=12.2668(8) Å, β=102.671(4)°, V=524.7 Å3, R=0.030, and Dx=5.976 g/cm3; Gd2Si2O7-a=6.5558(4), b=6.6469(4), c=12.2394(6) Å, β=102.844(3)°, V=520.0 Å3, R=0.026, and Dx=6.166 g/cm3. The type K structure is built from a diorthosilicate group [Si2O7] interconnected by REE3+ cations in eightfold coordination with oxygen. The bridging oxygen (Si-O-Si) bond angle of the diorthosilicate group of rare earth disilicates stable at 1 bar (types A to G) is related to spatial accommodation of the REE3+ cation and ranges from 130 to 135° in the light rare earth disilicates (types A, F, G) to 180° in Lu2Si2O7 (type C). Volume reduction in the high-pressure type K structure is achieved largely by closure of the Si-O-Si bond angle to 122.7-124.4°, through rigid body rotation of the two SiO4 tetrahedra. This also permits a marginal increase in the average coordination of the REE3+ cation.

  5. Eu3+/Sm3+ hybrids based with 8-hydroxybenz[de]anthracen-7-one organically modified mesoporous silica SBA-15/16

    Science.gov (United States)

    Gu, Yan-Jing; Yan, Bing

    2015-12-01

    A series of organic-inorganic hybrid materials were prepared by linking lanthanide (Eu3+, Sm3+) complexes to mesoporous SBA-15/SBA-16 through 8-hydroxybenz[de]anthracen-7-one modified silane (HBA-Si) as linker. The physical characterizations of these hybrids revealed that they all have high surface area, uniformity in mesostructure. The luminescence properties of these covalently bonded materials (denoted as Ln(HBA-SBA-15)3phen and Ln(HBA-SBA-16)3phen) were compared with ternary complexes (Ln(HBA)3phen) (Ln = Eu, Sm). Eu(HBA-SBA-15(16))3phen hybrids display better thermal stability, whose luminescent lifetimes and quantum efficiencies were matchable with those of Eu(HBA)3phen complex in spite of its much lower effective condensation of Eu3+ species. In addition, the luminescent performance of functionalized SBA-15 hybrids was more favorable than that of functionalized SBA-16 hybrids, revealing that SBA-15 was a better host material for lanthanide complex than mesoporous silica SBA-16.

  6. Spin dynamics and structural phase transitions in quasi-2D R sub 2 CuO sub 4 (R=Pr, Sm and Eu) antiferromagnetics

    CERN Document Server

    Golovenchits, E I

    2001-01-01

    One studied spin dynamics and dynamics of lattice in R sub 2 CuO sub 4 (R = Pr, Sm, and Eu) crystals within 20-250 GHz frequency range and within 50350 K temperature interval. One detected abrupt variation of absorption coefficient within wide range of frequencies above 120 GHz at 20, 80 and 150 K temperatures in R sub 2 CuO sub 4 (R = Pr, Sm, and Eu), respectively. Absorption jumpings result from structural phase transitions. Wide ranges of spin-wave excitations were observed in all examined crystals in high-temperature phase. Close to temperatures of phase transitions within wide range of frequencies including frequencies corresponding to ranges of spin-wave excitations one observed lines of a absorption caused by lattice dynamics

  7. Optimization of conditions for the determination of Eu, Gd and Sm by atomic absorption spectrometry (AAS) and atomic emission spectrometry (AES)

    International Nuclear Information System (INIS)

    The possibilities of the determination of Sm, Eu and Gd by atomic absorption and emission spectrometry were investigated. Measurement parameters on a Varian atomic absorption spectrometer were optimized (the height of the measurement above the nozzle of the burner, stoichiometry of the dinitrogen oxide-acetylene flame by statistical evaluation of the signals). The following optimal conditions were found for the Sm, Eu and Gd determinations: Samarium - measurement under the emission arrangement at 476.1 nm wavelength, slit width 0.05 nm, in reduction flame close to the outlet slit of the flame (at the lowest part of the flame). Europium - measurement under the absorption arrangement at 459.4 nm wavelength, slit width 1 nm, in reduction flame at the lowest part of the flame. Gadolinium - measurement under the emission arrangement at 461.7 nm wavelength, slit width 0.05 nm, at the lowest part of the flame. (author). 2 figs., 3 tabs., 2 refs

  8. Quantum yield dependence of electroluminescence of ZnS-Cu crystals doped with Sm, Eu, Pb or Tm on the exciting voltage frequency

    International Nuclear Information System (INIS)

    The frequency dependence of the quantum yield of electroluminescence of ZnS-Cu crystals doped with Eu, Sm, Pb or Tm within the frequency range from 50 Hz to 10 kHz and voltages 0.15-1.5 kW is measured. The maximum of this dependence may be explained by the competition of recombination processes and by the polarization of the crystal

  9. Crystal chemistry of layered manganites Ln1.4Sr1.6Mn2O7(Ln = La, Pr, Nd, Sm, Eu, and Gd)

    International Nuclear Information System (INIS)

    The powder X-ray diffraction patterns of a series of layered manganite compounds, Ln1.4Sr1.6Mn2O7(Ln = La, Pr, Nd, Sm, Eu, and Gd), were refined with the Rietveld method. The Ln occupancy in the rock salt site increases on moving from La through Gd. The variations of the lattice parameters and the bond distances correlate and can be accounted for with the distribution of Ln and Sr in the perovskite and rock salt sites. The structural analysis implies that the physical properties of these compounds have to vary monotonically form La through Sm and then more or less the same from Sm through Gd, which is not the case. Therefore, in order to understand the various physical properties of these compounds depending on Ln another factors such as the magnetic properties of Ln need to be considered

  10. Y3Al5O12:Re3+ (Re=Ce, Eu, and Sm nanocrystalline powders prepared by modified glycine combustion method

    Directory of Open Access Journals (Sweden)

    Lojpur V.

    2014-01-01

    Full Text Available Yttrium aluminum garnet doped with rare earth ions (Ce3+, Eu3+ and Sm3+ was prepared by modified glycine method. Ce3+ as a dopant was used in four different concentrations (Y3-xCexAl5O12; x(% = 1, 2, 3, 5, while doping concentration of Eu3+ and Sm3+ was Y3-xEuxAl5O12; x(% = 3 and Y3-xSmxAl5O12; x(% = 1, respectively. Phase composition of powders was investigated using XRD technique and expected target phase was confirmed. Photoluminescent characterization included measurements of excitation and emission spectra, as well as determination of emission decays. Y3-xCexAl5O12 shows intense broad-band emission, with maximum in green spectral region, at about 524 nm under ultraviolet or blue excitation. The origin of the luminescence is the 5d1→4f1 transition which is both parity and spin allowed. Ultraviolet and blue excitations of Eu3+ and Sm3+ doped Y3Al5O12 produce intense orange and red emissions. These emissions are phosphorescent in character and come from spin forbidden f-f electron transitions in Eu3+ and Sm3+ ions. For the case of Eu3+ doping emission comes mainly from 5D0→7F1 transitions with Stark components peaking at 590 nm and 590.75 nm, and with emission decay of 4.15 ms. In the case of Sm3+ doping, the emission spectrum, shows 4G5/2→6H5/2, 4G5/2→6H7/2, and 4G5/2→6H9/2 transitions, with the most intense stark components positioned at 567.5 nm, 617 nm, and 650 nm, respectively and for transition centered at 617 nm, emission decay is 3.12 ms. [Projekat Ministarstva nauke Republike Srbije, br. 171022 i br. 45012

  11. Syntheses, crystal structures and vibrational spectra of K Ln(SO 4) 2·H 2O ( Ln=La, Nd, Sm, Eu, Gd, Dy)

    Science.gov (United States)

    Kazmierczak, Karolina; Höppe, Henning A.

    2010-09-01

    The potassium lanthanide double sulphates K Ln(SO 4) 2·H 2O ( Ln=La, Nd, Sm, Eu, Gd, Dy) were obtained by evaporation of aqueous reaction mixtures of rare earth (III) sulphates and potassium thiocyanate at 298 K. X-ray single-crystal investigations show that K Ln(SO 4) 2·H 2O ( Ln=Nd, Sm, Eu, Gd, Dy) crystallise monoclinically ( Ln=Sm: P2 1/ c, Z=4, a=10.047(1), b=8.4555(1), c=10.349(1) Å, w R2=0.060, R1=0.024, 945 reflections, 125 parameters) while KLa(SO 4) 2·H 2O adopts space group P3 221 (Z=3, a=7.1490(5), c=13.2439(12) Å, w R2=0.038, R1=0.017, 695 reflections, 65 parameters). The coordination environment of the lanthanide ions in K Ln(SO 4) 2·H 2O is different in the case of the Nd/Sm/Gd and the Eu/Dy compounds, respectively. In the first case the Ln atoms are nine-fold coordinated in contrast to the latter where the Ln ions are eight-fold coordinated by oxygen atoms. The vibrational spectra of K Ln(SO 4) 2·H 2O and the UV-vis reflection spectra of KEu(SO 4) 2·H 2O and KNd(SO 4) 2·H 2O are also reported.

  12. Microwave-assisted ionic-liquid-based synthesis of highly crystalline CaMoO4:RE3+ (RE = Tb, Sm, Eu) and Y2Mo4O15:Eu3+ nanoparticles

    Science.gov (United States)

    Kuzmanoski, Ana; Pankratov, Vladimir; Feldmann, Claus

    2015-03-01

    Fluorescent CaMoO4:RE3+ (RE = Tb, Sm, Eu) nanoparticles, 50-70 nm in diameter, were prepared via a microwave-assisted synthesis in ionic liquids. Herein, the ionic liquid allows heating to high temperatures in the liquid phase (200 °C), which guarantees for an optimal crystallization of the nanoparticles. All nanoparticles were indeed readily crystalline without the need of any additional powder sintering. Especially, CaMoO4:Tb and CaMoO4:Eu exhibit high quantum yields of 52% and 82% under UV-excitation (300-320 nm). All compounds were characterized by electron microscopy (SEM), dynamic light scattering (DLS), infrared spectroscopy (FT-IR), energy-dispersive X-ray analysis (EDX), X-ray diffraction (XRD), and fluorescence spectroscopy (FL). In order to shift the excitation to even higher wavelengths, Y2Mo4O15:Eu was firstly realized as a nanomaterial, again, using the microwave-assisted synthesis in ionic liquids. Y2Mo4O15:Eu exhibits a particle size of 25-30 nm, and shows a high quantum yield of 67%, too. As this nanomaterial can be excited up to 400 nm, it represents one of the first efficient red-emitting, Eu3+-doped nanomaterials for near-UV excitation (>350 nm) with a simple, low-cost UV-LED. This can be relevant for all kinds of thin-film applications as well as for optical imaging.

  13. Photocatalytic degradation of an azo dye using Bi3.25M0.75Ti3O12 nanowires (M = La, Sm, Nd, and Eu)

    International Nuclear Information System (INIS)

    Highlights: ► BMT nanostructures with high photocatalytic activity were successfully synthesized through a facile template-free hydrothermal method. ► BMT samples were characterized by various characterization technologies. ► BMT samples presented outstanding visible-light-induced photocatalytic performance. ► The photoactivity of BMT is highly affected by its morphology. ► BMT nanowires showed the highest photocatalytic activity. -- Abstract: Bi3.25M0.75Ti3O12 (BMT, M = La, Sm, Nd, and Eu) nanowires were synthesized through simple hydrothermal route and their structural and photocatalytic properties were investigated. XRD results indicated that these compounds are of layered perovskites structure. In addition, the band gaps of Bi3.25La0.75Ti3O12 (BLT), Bi3.25Sm0.75Ti3O12 (BST), Bi3.25Nd0.75Ti3O12 (BNT), and Bi3.25Eu0.75Ti3O12 (BET) were estimated to be about 2.403, 2.594, 2.525, and 2.335 eV, respectively. Their photocatalytic activities were evaluated by photocatalytic degradation of methyl orange (MO) under visible light irradiation (λ > 420 nm). Bi3.25M0.75Ti3O12 (M = La, Sm, Nd, and Eu) showed markedly higher catalytic activity compared to traditional N doped TiO2 (N-TiO2) and pure bismuth titanate (Bi4Ti3O12, BIT) for MO photocatalytic degradation under visible light irradiation. The high photocatalytic performance of Bi3.25M0.75Ti3O12 photocatalysts could be attributed to the strong visible light absorption and the recombination restraint of the e−/h+ pairs resulting from doping of rare earth metal ions. Furthermore, BET nanowires exhibited the highest photocatalytic activity

  14. Emission analysis of RE{sup 3+} (RE=Eu, Sm, Dy):MgY{sub 4}Si{sub 3}O{sub 13} phosphors

    Energy Technology Data Exchange (ETDEWEB)

    Reddy, B. Sudhakar, E-mail: drbsreddyphd@gmail.com [School of Information and Communications, Gwangju Institute of Science and Technology, Gwangju 500-712 (Korea, Republic of); Department of Physics, Sri Venkateswara Degree College, Kadapa 516003 (India); Kadukar, Monali R. [Department of Physics, R.T.M. Nagpur University, Nagpur 440033 (India); Hwang, Hyeong-Yong; Ham, Byoung Seung [School of Information and Communications, Gwangju Institute of Science and Technology, Gwangju 500-712 (Korea, Republic of); Sailaja, S. [Department of Physics, Sri Venkateswara Degree College, Kadapa 516003 (India); Rambabu, U. [Centre for Materials for Electronics Technology (C-MET), Department of Information, Technology, Govt. of India, Cherlapally, Hyderabad 500051 (India); Dhoble, S.J. [Department of Physics, R.T.M. Nagpur University, Nagpur 440033 (India); Jho, Young-Dahl, E-mail: jho@gist.ac.kr [School of Information and Communications, Gwangju Institute of Science and Technology, Gwangju 500-712 (Korea, Republic of)

    2015-04-15

    A series of Eu{sup 3+}, Sm{sup 3+}, and Dy{sup 3+} ion doped magnesium yttrium silicate [MgY{sub 4}Si{sub 3}O{sub 13}] phosphors was synthesized using the solid-state reaction method with a grain size of approximately 500 nm in hexagonal symmetry. The photoluminescence (PL) spectra of the Eu{sup 3+}, Sm{sup 3+}, and Dy{sup 3+}:MgY{sub 4}Si{sub 3}O{sub 13} phosphors exhibit bright red, orange-red and yellow emissions at 615 nm ({sup 5}D{sub 0}→{sup 7}F{sub 2}), 603 nm ({sup 4}G{sub 52}→{sup 6}H{sub 7/2}), and 574 nm ({sup 4}F{sub 9/2}→{sup 6}H{sub 13/2}), respectively. The thermoluminescence (TL) of the phosphors displays the maximum intensity consistently at 10 mol% of the ion concentrations, with a single glow peak around 165 °C (Eu{sup 3+}-activated phosphor), 230 °C (Sm{sup 3+}-activated phosphor), and 230 °C (Dy{sup 3+}-activated phosphor), respectively. The trap parameters such as the order of kinetics (b), activation energy (E), frequency factor (S), and Balarin parameter (γ) associated with the most intensive glow peak of these phosphors were finally determined by analyzing their line-shapes on the basis of Chen's method.

  15. Síntesis hidrotermal de monocristales LnMn2O5 (Ln= Y, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho y Er

    Directory of Open Access Journals (Sweden)

    Señarís Rodríguez, M. A.

    2008-08-01

    Full Text Available Ten single crystals of the series LnMn2O5 (Ln= Y, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho and Er were synthesized by hydrothermal synthesis in a single step and without subsequent thermal treatments from aqueous solutions of metals salts at 240 ºC. The obtained single crystals have a size of various micrometers and their morphology changes throughout the serie: they are polygonal in the case of the compounds with Ln= Pr, Nd, Sm, Eu and Gd and needle-like in the case of the compounds with Ln= Y, Tb, Dy, Ho and Er. After the analysis of the obtained products employing different conditions of synthesis we attributed the different morphology to a greater growth rate along the c axis when the smaller ions (Y, Tb, Dy, Ho y Er are involved, due to their better adaptation to the compound’s crystal structure.Se han conseguido preparar monocristales de 10 óxidos mixtos de la serie LnMn2O5 (Ln= Y, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho y Er mediante síntesis hidrotermal optimizada, en un único paso y sin tratamientos térmicos posteriores partiendo de las correspondientes sales metálicas en disolución acuosa a 240 ºC. Los monocristales obtenidos son relativamente grandes, de varias micras y su morfología varía a lo largo de la serie: es poligonal en el caso de los compuestos de los lantánidos del inicio de la serie (Ln= Pr, Nd, Sm, Eu y Gd y acicular en el caso de los compuestos de Y y de los lantánidos del final de la serie (Ln= Tb, Dy, Ho y Er. Tras el análisis de los productos obtenidos empleando distintas condiciones de síntesis atribuimos la diferente morfología a una mayor velocidad de crecimiento cristalino a lo largo del eje c cuando intervienen los iones más pequeños (Y, Tb, Dy, Ho y Er debido a la mejor adaptación de éstos últimos a la estructura cristalina del compuesto.

  16. The structures and luminescence properties of lanthanide (Ln = Sm, Eu and Tb) metal-organic coordination polymers based on 5-(2-hydroxyethoxy)isophthalate ligand

    Science.gov (United States)

    Wang, Peng; Zhang, Yu-Jie; Qin, Jie; Chen, Yong; Zhao, Ying

    2015-03-01

    Three unreported isomorphous Ln-containing metal-organic coordination polymeric complexes {LnL(HL)ṡ(H2O)2}n (Ln = Sm (1), Eu (2) and Tb (3), CCDC 971815-971817) were synthesized based on 5-(2-hydroxyethoxy) isophthalic acid (H2L) under hydrothermal conditions. The obtained coordination polymers were characterized by IR, elemental analysis, thermal analysis and X-ray diffraction In solid state, these polymers featured 3-D supramolecular structures constructed by 2-D sheets through H-bonds. Investigation of photoluminescence properties of H2L and 1-3 showed all of them exhibited intense fluorescent emissions in the solid state at room temperature.

  17. Luminescence and application of red-emitting phosphors of Eu3+-activated R2Zr3(MoO4)9 ( R = La, Sm, Gd)

    Science.gov (United States)

    Qi, Shuyun; Huang, Yanlin; Cheng, Han; Seo, Hyo Jin

    2016-01-01

    New red-emitting phosphors R2Zr3(MoO4)9:Eu3+ ( R = La, Sm, Gd) were prepared using the convenient solid-state reaction method. The samples were characterized by X-ray powder diffraction (XRD) measurements and structural refinements. The luminescence properties were investigated by photoluminescence spectra, decay curves, and absolute internal quantum efficiency (QE). The phosphors exhibited bright red luminescence corresponding to the electric dipole transition 5D0→7F2 at 615 nm under near UV light excitation. The thermal stability of the luminescence was investigated using temperature-dependent intensities at temperatures from 20 to 170°C. The results indicate that Gd2Zr3(MoO4)9:Eu3+ could be potentially considered for lighting due to its qualities, including their excitation spectra, QEs, red color coordinates, and thermal stability. [Figure not available: see fulltext.

  18. An investigation on photoluminescence and energy transfer of Eu{sup 3+}/Sm{sup 3+} single-doped and co-doped Ca{sub 4}YO(BO{sub 3}){sub 3} phosphors

    Energy Technology Data Exchange (ETDEWEB)

    Bandi, Vengala Rao; Grandhe, Bhaskar Kumar [Department of Physics, Changwon National University, Changwon 641-773 (Korea, Republic of); Jang, Kiwan, E-mail: kwjang@changwon.ac.kr [Department of Physics, Changwon National University, Changwon 641-773 (Korea, Republic of); Shin, Dong-Soo [Department of Chemistry, Changwon National University, Changwon (Korea, Republic of); Yi, Soung-Soo [Department of Photonics, Silla University, Busan (Korea, Republic of); Jeong, Jung-Hyun [Department of Physics, Pukyong National University, Busan (Korea, Republic of)

    2013-07-15

    The present investigation aims to demonstrate the potentiality of Eu{sup 3+}/Sm{sup 3+} single-doped and co-doped Ca{sub 4}YO(BO{sub 3}){sub 3} phosphors, which were prepared by a sol–gel method. The X-ray diffraction (XRD) profiles showed that all the observed peaks could be attributed to the monoclinic phase of Ca{sub 4}YO(BO{sub 3}){sub 3}. From the measured emission profiles, we have noticed that both the single-doped Eu{sup 3+}/Sm{sup 3+} phosphors shows four emission transitions of {sup 5}D{sub 0} → {sup 7}F{sub 0,1,2,3} and {sup 4}G{sub 5/2} → {sup 6}H{sub 5/2,7/2,9/2,11/2} respectively. Among them, the {sup 5}D{sub 0} → {sup 7}F{sub 2} of Eu{sup 3+} and {sup 4}G{sub 5/2} → {sup 6}H{sub 7/2} of Sm{sup 3+} are intense emission transitions, leading to an intense red color emission from the prepared phosphors. The excitation spectra showed that Eu{sup 3+}/Sm{sup 3+} doped samples can be excited efficiently by 394 nm and 402 nm respectively, incidentally which matches well with the characteristic emission from UVLED. The co-doping of Sm{sup 3+} ions can broaden and strengthen the absorption of near UV region and to be efficient to sensitize the emission of the Ca{sub 4}YO(BO{sub 3}){sub 3}:Eu{sup 3+} phosphor. The mechanism involved in the energy transfer between Eu{sup 3+} and Sm{sup 3+} has been explained and elucidated by an energy level diagram. - Highlights: • Eu{sup 3+} or/and Sm{sup 3+}:Ca{sub 4}YO(BO{sub 3}){sub 3} phosphors were prepared by sol–gel method. • The co-doping of Sm{sup 3+} to Ca{sub 4}YO(BO{sub 3}){sub 3}:Eu{sup 3+} extends its absorption of NUV region. • It has intense absorption in NUV region, which is suitable for NUV LED. • The energy transfer process between Eu{sup 3+} and Sm{sup 3+} ions were discussed.

  19. Luminescence properties and energy transfer in the novel red emitting phosphors Ba{sub 2}Ln(BO{sub 3}){sub 2}Cl:Sm{sup 3+}, Eu{sup 3+} (Ln=Y, Gd)

    Energy Technology Data Exchange (ETDEWEB)

    Fan, Yan; Hu, Yihua, E-mail: huyh@gdut.edu.cn; Chen, Li; Wang, Xiaojuan; Ju, Guifang

    2014-10-01

    A series of Sm{sup 3+}/Eu{sup 3+} singly and co-doped Ba{sub 2}Ln(BO{sub 3}){sub 2}Cl (Ln=Y{sup 3+}, Gd{sup 3+}) phosphors were prepared via the solid-state method. The XRD results indicate that the as-prepared products keep the monoclinic structure with a P{sub 21/m} space group of Ba{sub 2}Ln(BO{sub 3}){sub 2}Cl, which belongs to the isomorphic substitution for Ln{sup 3+} sites in the Ba{sub 2}Yb(BO{sub 3}){sub 2}Cl host. The photoluminescence (PL) spectra demonstrate that Ba{sub 2}Ln(BO{sub 3}){sub 2}Cl:Sm{sup 3+},Eu{sup 3+} emits red light centered at 593 nm under the 393 nm excitation which is in good agreement with the emission wavelength from near ultraviolet light-emitting diodes (LEDs). The luminescence decays suggest that the energy transfer from Sm{sup 3+} to Eu{sup 3+} ions in Ba{sub 2}Ln(BO{sub 3}){sub 2}Cl:Eu{sup 3+}, Sm{sup 3+} occurs. All results mean that Ba{sub 2}Ln(BO{sub 3}){sub 2}Cl:Eu{sup 3+}, Sm{sup 3+} phosphors exhibit potential to act as a kind of red phosphor for near ultraviolet white light-emitting diodes (w-LEDs)

  20. Luminescence properties and energy transfer in the novel red emitting phosphors Ba2Ln(BO3)2Cl:Sm3+, Eu3+ (Ln=Y, Gd)

    International Nuclear Information System (INIS)

    A series of Sm3+/Eu3+ singly and co-doped Ba2Ln(BO3)2Cl (Ln=Y3+, Gd3+) phosphors were prepared via the solid-state method. The XRD results indicate that the as-prepared products keep the monoclinic structure with a P21/m space group of Ba2Ln(BO3)2Cl, which belongs to the isomorphic substitution for Ln3+ sites in the Ba2Yb(BO3)2Cl host. The photoluminescence (PL) spectra demonstrate that Ba2Ln(BO3)2Cl:Sm3+,Eu3+ emits red light centered at 593 nm under the 393 nm excitation which is in good agreement with the emission wavelength from near ultraviolet light-emitting diodes (LEDs). The luminescence decays suggest that the energy transfer from Sm3+ to Eu3+ ions in Ba2Ln(BO3)2Cl:Eu3+, Sm3+ occurs. All results mean that Ba2Ln(BO3)2Cl:Eu3+, Sm3+ phosphors exhibit potential to act as a kind of red phosphor for near ultraviolet white light-emitting diodes (w-LEDs)

  1. EU

    DEFF Research Database (Denmark)

    Abrahamson, Peter; Borchorst, Anette

    2002-01-01

    Der er et komplekst forhold mellem EU og den danske velfærdsstat. Den sociale dimension i det europæiske samarbejde er splittet mellem et pres mod harmonisering og pres for at fastholde national suverænitet. Negativ integration har været den foretrukne interventionsform. Drivkræfterne har især...

  2. Hydrothermal Synthesis, Characterization and Magnetic Properties of Rare Earth Iron Garnets Sm3Fe5O12 and Eu3Fe5O12

    Institute of Scientific and Technical Information of China (English)

    GUO Li; YUAN Hong-ming; HUANG Ke-ke; YUAN Lin; LIU Shao-kong; FENG Shou-hua

    2011-01-01

    The rare earth iron garnets R3Fe5O12(R=Sm,Eu) were synthesized under mild hydrothermal conditions,and their crystal growth was found to be sensitive to alkalinity,reaction temperature and time.The as-prepared samples were characterized by powder X-ray diffraction(XRD),scanning electron microscopy(SEM),infrared spectra(IR) and Raman spectrum.The M vs.H loops and magnetic parameters have been traced with a vibrating sample magnetometer(VSM) and superconducting quantum interference devices(SQUIDs) magnetometer.We proposed the formation mechanisms and formulated a reasonable explanation for their growth habits.Different morphologic characteristics were observed by changing alkalinity in the reaction systems.The magnetic studies gave saturation magnetization(Ms) and Curie temperature(TC).The magnetic behaviors of Sm3Fe5O12 and Eu3Fe5O12 in mild hydrothermal systems are comparable with those in high temperature solid state reactions.

  3. Microwave-assisted hydrothermal synthesis and multicolor tuning luminescence of YPxV1-xO4:Ln3+ (Ln = Eu, Dy, Sm) nanoparticles

    International Nuclear Information System (INIS)

    Highlights: → Eu3+, Dy3+ and Sm3+ doped nano-sized YP0.8V0.2O4 phosphors were synthesized by a simple and facile microwave assisted hydrothermal process. → Multicolor emissions can be obtained in YP0.8V0.2O4 host lattice by simply changing the kinds and concentrations of the doping rare earth ions. - Abstract: Eu3+, Dy3+ and Sm3+ doped nano-sized YP0.8V0.2O4 phosphors were synthesized by a simple and facile microwave assisted hydrothermal process. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), photoluminescence (PL) spectra as well as kinetic decay were used to characterize the samples. Under ultraviolet excitation, the YP0.8V0.2O4:Ln3+ showed the VO43- self-emission band at approximately 452 nm and the characteristic emission of doped lanthanide ions (Ln3+). The VO43- self-emission band decreases when the concentration of lanthanide ion increases, because lanthanide ions acts as activator and receives an efficient energy transfer from VO43-. Through changing the kinds and concentrations of doped Ln3+, the emission colors of the nanophosphor can be tuned in a wide region on CIE color coordinates, making the material have potential application in biolabels.

  4. EU

    DEFF Research Database (Denmark)

    Nissen, Mogens Rostgaard

    2008-01-01

    politiske sigte er, at det tværnationale samarbejde skal øge den politiske og kulturelle samhørighed landene imellem. I det dansk-tyske grænseområde har EU gennem mange år forsøgt at medvirke til øge samarbejdet over grænsen. Der er ydet økonomisk og politisk støtte til forskellige projekter, der kan styrke...

  5. Synthesis and photoluminescence properties of Eu{sup 3+}, Sm{sup 3+} and Pr{sup 3+} doped Ca{sub 2}ZnWO{sub 6} phosphors for phosphor converted LED

    Energy Technology Data Exchange (ETDEWEB)

    Dabre, K.V. [Department of Physics, Arts, Commerce and Science College, Koradi, Nagpur-441111, Maharashtra (India); Dhoble, S.J., E-mail: sjdhoble@rediffmail.com [Department of Physics, R.T.M. Nagpur University, Nagpur-440033, Maharashtra (India)

    2014-06-01

    In this work, we report on the synthesis and photoluminescence (PL) properties of rare earth (Eu{sup 3+}, Sm{sup 3+} and Pr{sup 3+}) doped double perovskite tungstate Ca{sub 2}ZnWO{sub 6} phosphor. The phosphors were synthesized by two step modified solid state method. Phase purity and formation of phosphor were confirmed by XRD technique. PL spectra of Eu{sup 3+}, Sm{sup 3+} and Pr{sup 3+} doped phosphor show intense emission peaks in red region at 615, 604 and 650 nm respectively, upon the visible excitation of 466 nm (Eu{sup 3+}), 410 nm (Sm{sup 3+}) and 491 nm (Pr{sup 3+}). The CIE coordinates of the phosphors are in the yellow (Sm{sup 3+} doped sample) and orange (Eu{sup 3+} and Pr{sup 3+} doped sample) regions near the edge of color space which confirms their applicability in LEDs. -- Highlights: •Eu{sup 3+}, Sm{sup 3+} and Pr{sup 3+} doped and undoped samples of Ca{sub 2}ZnWO{sub 6} phosphor synthesized by Solid state method. •The phosphors have intense excitation in violet and blue region of visible spectrum. •Phosphors show intense emission peaks in red region. •CIE coordinates of phosphors are lie in yellow (Sm{sup 3+} doped phosphor) and orange (Eu{sup 3+} and Pr{sup 3+} doped phosphor) region near to edge of color space.

  6. Síntesis hidrotermal de monocristales LnMn2O5 (Ln= Y, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho y Er)

    OpenAIRE

    Señarís Rodríguez, M. A.; Castro García, S.; Sánchez Andújar, M.; Yáñez Vilar, S.

    2008-01-01

    Ten single crystals of the series LnMn2O5 (Ln= Y, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho and Er) were synthesized by hydrothermal synthesis in a single step and without subsequent thermal treatments from aqueous solutions of metals salts at 240 ºC. The obtained single crystals have a size of various micrometers and their morphology changes throughout the serie: they are polygonal in the case of the compounds with Ln= Pr, Nd, Sm, Eu and Gd and needle-like in the case of the compounds with Ln= Y, Tb, D...

  7. Surfactant-mediated PMMA-templating fabrication and characterization of three-dimensionally ordered macroporous Eu{sub 2}O{sub 3} and Sm{sub 2}O{sub 3} with mesoporous walls

    Energy Technology Data Exchange (ETDEWEB)

    Zhang Han [Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124 (China); Dai Hongxing, E-mail: hxdai@bjut.edu.cn [Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124 (China); Liu Yuxi; Deng Jiguang; Zhang Lei; Ji Kemeng [Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124 (China)

    2011-09-15

    Graphical abstract: Three-dimensionally ordered macroporous (3DOM) Eu{sub 2}O{sub 3} and Sm{sub 2}O{sub 3} with mesopore walls can be fabricated by the surfactant-assisted PMMA-templating method. 3DOM Eu{sub 2}O{sub 3} obtained with sucrose possesses a surface area up to 37 m{sup 2} g{sup -1}. 3DOM Eu{sub 2}O{sub 3} and Sm{sub 2}O{sub 3} show strong UV-light absorption. By tailoring the pore structure of Eu{sub 2}O{sub 3} and Sm{sub 2}O{sub 3}, the luminescent property can be modified. Highlights: {yields} 3DOM Eu{sub 2}O{sub 3} and Sm{sub 2}O{sub 3} with mesopore walls are fabricated by the PMMA-templating method. {yields} Surfactant addition and carbonization process favor the formation of the 3DOM structure. {yields} 3DOM Eu{sub 2}O{sub 3} obtained with sucrose possesses a surface area up to about 37 m{sup 2} g{sup -1}. {yields} 3DOM Eu{sub 2}O{sub 3} and Sm{sub 2}O{sub 3} show excellent UV-light absorption. {yields} The luminescent property can be modified by tailoring the pore structure of Eu{sub 2}O{sub 3} and Sm{sub 2}O{sub 3}. - Abstract: Three-dimensionally ordered macroporous (3DOM) europium oxide and samarium oxide with mesoporous walls and cubic crystal structures have been successfully fabricated with polymethyl methacrylate (PMMA) as hard template and F127, sucrose, and L-lysine as surfactant. The as-fabricated rare earth oxides were characterized by means of X-ray diffraction, thermogravimetric analysis, differential scanning calorimetric analysis, Fourier-transform infrared spectroscopy, scanning electron microscope, transmission electron microscopy, selected-area electron diffraction, nitrogen adsorption-desorption, ultraviolet-visible diffuse reflectance spectroscopy, and photoluminescence spectroscopy. It is shown that the as-fabricated Eu{sub 2}O{sub 3} and Sm{sub 2}O{sub 3} samples displayed 3DOM architectures with polycrystalline wormhole-like mesoporous walls. The nature of surfactant and solvent and calcination parameter had important

  8. Crystal structures of Ln2-xCexCuO4-y electron carrier superconductors with Ln = Nd, Sm, Eu

    International Nuclear Information System (INIS)

    The X-ray crystal structures, of three Lna-xCexCuO4-y mixed oxides with Ln = Nd, Sn, and Eu have been determined. All the three oxides crystallize in the tetragonal space group I4/nnn with the following lattice parameters: (Nd,Ce) a = 3.9479(3), c = 12.039(1), A; (Sn,Ce) a =- 3.9219(3), c = 11.8885(7) A; (Eu,Ce) a = 3.9169(6), c = 11.897(2) A. In this paper structural results are compared and discussed with those of other ceramic copper oxides

  9. Investigation of solid-phase interaction of Ln2O3 with CoO (Ln--Sm,Eu,Gd,Dy,Ho)

    International Nuclear Information System (INIS)

    A thermogravimetric analysis has been used to study the kinetics and mechan nism of solid-phase synthesis of cobaltites of the LnCoO3 composition (Ln=Sm, Eu, Gd, Dy, Ho) during the interaction of Ln2O3 powders with h CoO in the 920-1030 deg c range. The LnCoO3 synthesis is realized unde diffusion conditions. Kinetic parameters of the LnCoO3 production are clcu ulated. The rate of LnCoO3 solid-phase synthesis is shown to decrease with increasing re order number. The effect of gas atmosphere composition, pressure of mixture briquetting, velocity of air supply into the reactor on the rate and conditions of interactions is estimated

  10. Solubility and superconductivity in RE(Ba2-xREx)Cu3O7+δ (RE = Nd, Sm, Eu, Gd, Dy)

    International Nuclear Information System (INIS)

    Solid solutions of RE(Ba2-xREx)Cu3O7-δ(RE=Nd,Sm,Eu,Gd,Dy) for x=0 to x=0.5 have been investigated. X-ray and resistivity measurements show that there exists a solid solution region, through which, the structure changes from orthorhombic to tetragonal and the superconducting properties are depressed. The solubility limits depend strongly on the size of the rare-earth ion, with the smallest (Dy) showing no appreciable solubility. The superconducting transition temperature versus x for all of the rare-earth ion substitutions falls on a universal curve, indicating that the Ba sites are extremely ionic and magnetically isolated. 20 refs., 4 figs

  11. High spin, hole delocalization and electron transfer in LBaCo2O5.5 (L = Sm, Eu, Gd, Tb, Dy, Y)

    International Nuclear Information System (INIS)

    By means of electron-correlation-corrected density functional calculations for GdBaCoO5.5, it has been found that the pdσ hole delocalization in the 'almost high-spin' state is responsible for the antiferromagnetic-ferromagnetic-like transition and insulator-metal transition in isostructural LBaCo2O5.5 (L = Sm, Eu, Gd, Tb, Dy, Y), and that the simultaneous octahedral Co1 3z2 - r2 /x2 - y2 (pyramidal Co2 x2 - y2) → Co1 (Co2) yz electron transfer gives rise to the lattice anomaly at TIM. The present study, supporting the author's prior work (Wu H 2001 Phys. Rev. B 64 092413), provides a unified explanation for a number of experimental findings for LBaCo2O5.5

  12. Crystal Structures and Magnetic Properties of 6H-Perovskites Ba 3MRu 2O 9 ( M=Y, In, La, Sm, Eu, and Lu)

    Science.gov (United States)

    Doi, Yoshihiro; Matsuhira, Kazuyuki; Hinatsu, Yukio

    2002-05-01

    Magnetic properties of quaternary oxides Ba3MRu2O9 (M=Y, In, La, Sm, Eu, and Lu) are reported. Rietveld analyses of the X-ray diffraction data indicate that they adopt the 6H-perovskite structure and have the valence state of Ba3M3+ Ru4.5+2O9. All compounds are nonmetallic at least over the temperature range of 100-400 K. The magnetic susceptibilities show a broad maximum at 135-370 K except for the La compound, which shows a plateau around 22 K. In addition, another magnetic anomaly is observed at 4.5-12.5 K by the magnetic susceptibility and specific heat measurements for any compound. It is considered that this magnetic behavior is ascribed to the antiferromagnetic coupling between two Ru ions in a Ru2O9 dimer and to the magnetic interaction between the Ru2O9 dimers.

  13. Crossrelaxations and non-radiative energy transfer from ({sup 4}G{sub 5/2}) Sm{sup 3+} → ({sup 5}D{sub 0}) Eu{sup 3+}: B{sub 2}O{sub 3}–ZnO glasses

    Energy Technology Data Exchange (ETDEWEB)

    Naresh, V., E-mail: varna.naresh@gmail.com; Rudramadevi, B.H.; Buddhudu, S., E-mail: profsb_svuniv@hotmail.com

    2015-05-25

    Graphical abstract: The energy transfer process occurring from Sm{sup 3+} to Eu{sup 3+} in B{sub 2}O{sub 3}–ZnO (BZn) glasses is analyzed. Based on the Foster–Dexter theory, the possibility of energy transfer between Sm{sup 3+} and Eu{sup 3+} has been demonstrated from the spectral overlap of Eu{sup 3+} absorption and Sm{sup 3+} emission, photoluminescence spectra, energy level diagram and lifetime measurements. The energy transfer mechanism in (Sm{sup 3+} + Eu{sup 3+}) co-doped glass is governed by dipole–dipole interaction. - Highlights: • Spectroscopic properties of individually doped Sm{sup 3+}, Eu{sup 3+} & co-doped (Sm{sup 3+} + Eu{sup 3+}) in BZn glasses were studied separately. • The effect of Eu{sup 3+} concentration on luminescence properties is explained from cross-relaxations. • Energy transfer from Sm{sup 3+} ({sup 4}G{sub 5/2}) to Eu{sup 3+} ({sup 5}D{sub 0}) has been explained from Foster–Dexter theory. • Dipole–dipole mechanism governs the energy transfer from Sm{sup 3+} to Eu{sup 3+}. - Abstract: The present paper reports on the results concerning to photoluminescence features of Eu{sup 3+}, Sm{sup 3+} ions and energy transfer process occurring from Sm{sup 3+} to Eu{sup 3+} doped in 45 B{sub 2}O{sub 3}–55 ZnO (BZn) glasses prepared by melt quenching technique. Luminescence quenching as a function of Eu{sup 3+} concentration in BZn glasses has been discussed. Among the studied concentrations, 0.5 mol% of Eu{sup 3+} is optimized because it has exhibited red emission transition {sup 5}D{sub 0} → {sup 7}F{sub 2}. With regard to Sm{sup 3+} glasses, orange emission at 602 nm ({sup 4}G{sub 5/2} → {sup 6}H{sub 7/2}) has been noticed on exciting with λ{sub exci} = 403 nm. Based on the Foster–Dexter theory, the possibility of energy transfer between Sm{sup 3+} and Eu{sup 3+} has been explained from the spectral overlap of Eu{sup 3+} absorption and Sm{sup 3+} emission. The optimized concentration 0.5 mol% of Eu{sup 3+} is co

  14. Structural and electrical properties of T'-type Ln2CuO4 (Ln = Pr, Nd, Sm, Eu and Gd) ceramics

    Science.gov (United States)

    Salame, Paresh Hiralal

    2016-05-01

    T'-type Ln2CuO4 (Ln = Pr, Nd, Sm, Eu and Gd) were successfully synthesized in phase pure form using conventional solid state reaction and sintering route. For all the Ln2CuO4 samples, the solid state reaction temperature was found to be 950 °C and pure phase was realized only after 2-3 intermediate milling and solid state reaction cycles, irrespective of the lanthanide ion radius. Effect of lanthanide ion contraction on the structural properties was clearly revealed by the powder X-ray diffraction, with the XRD peaks observed to be shifting towards higher 2θ values with the decrease in Ln ionic radii. The optimum sintering temperature of these solid state reacted Ln2CuO4 powder was found to be 1100 °C except for Pr2CuO4 powder. The conductivity of these samples were tested over a wide temperature range (-100 to 150 °C), an anomaly was observed in the conductivity of all the Ln2CuO4 samples near the antiferromagnetic ordering temperature of Cu (~ 30 °C), thus suggesting the bearing of ordering of magnetic moments on the electrical properties.

  15. Thermochemical Properties of RE(Gly) 4Im( ClO4) 3· 2H2O(RE = La, Pr, Nd, Sm, Eu)

    Institute of Scientific and Technical Information of China (English)

    何水样; 刘向荣; 宋迪生; 胡荣祖

    2001-01-01

    The enthalpies of solution in water for five new light rare earth ternary complexes RE(Gly)4Im(ClO4)3@ 2H2O (gE =La, Pr, Nd, Sm, Eu; Gly-glycine; Im-imidazole) were measured by means of a Calvet microcalorimeter. The empirical formula of enthalpy of solution (Asol H), relative apparent molar enthalpy ( φLi ), relative partial molar enthalpy ( Li )and enthalpy of dilution (AdilH1,2) were drawn up by the data of entalpies of solution of these complexes. From three plots of the values of standard enthalpy of solution AsolHΘm, φLi,Li) versus the values of ionic radius (r) of the light rare earth elements, the grouping effect of lanthanide was observed, showing that the coordination bond between rare earth ion and ligand possesses a certain extent of the property of a covalent bond. The standard enthalpies of solution in water of similar complexes, Ce(Gly)4Im(ClO4)3@2H2O were estimated according to the plot of AsolHΘm, versus r.

  16. The effect of Sm, Eu and Yb on the thermoelectric properties of Th/sub 3/P/sub 4/ - type lanthanum sulfide

    International Nuclear Information System (INIS)

    The Th/sub 3/P/sub 4/-type lanthanum sulfides are n-type semiconductors and a continuous series of solid solutions is found between the compositions of La/sub 3/S/sub 4/ and La/sub 2/S/sub 3/. These materials are attractive for use in high temperature thermoelectric applications because of their high melting points, low thermal conductivities and their inherent ability to vary the electron concentration from a maximum of 6.02 X 10/sup 21/ cm/sup -3/ for La/sub 3/S/sub 4/ to zero for La/sub 2/S/sub 3/ (i.e., self-doping). In this study, La/sub 3/S/sub 4/ compounds in which trivalent La has been partially substituted by divalent Sm, Eu or Yb (La/sub 3-x/M/sub x/S/sub 4/, x = 0.1 to 0.9) have been prepared by the pressure assisted reaction sintering method and were found to have the Th/sub 3/P/sub 4/ structure. The thermoelectric properties (Seebeck coefficient and electrical resistivity) were measured as a function of temperature and the optimum composition was found for x between 0.2 and 0.3 in which the electrical power factor was a maximum at 10000C

  17. R dependence of superconductivity and thermopower in the Bi2Sr2-xRxCuOy (R=La, Sm and Eu) system

    International Nuclear Information System (INIS)

    We have grown single crystals of Bi2Sr2-xRxCuOy with R=La, Sm and Eu for a wide range of R content x and measured resistivity and the thermopower. The relation between the value of thermopower at 290K, S(290), and the superconducting transition temperature Tc determined simultaneously on the same single crystal clearly shows that Tc at the optimal doping Tcmax strongly depends on the R element. More importantly, we found that the range of S(290) values of samples with a non-zero Tc is narrower when the R element is changed to one with a smaller ionic radius. The narrowing of the range of S(290) values indicates that the range of carrier density where high-Tc superconductivity occurs in this system depends on the R element. We argue that these behaviors are a consequence of the difference in the transfer integrals in the CuO2 plane accompanied with the structural change caused by replacing the R element to one with a different ionic radius

  18. Enhancing the water-resistance stability of CaS:Eu2+,Sm2+phosphor with SiO2-PMMA composite coating

    Institute of Scientific and Technical Information of China (English)

    张杰强; 范艳伟; 陈朝阳; 闫世友; 王军华; 赵鹏君; 郝斌; 盖敏强

    2015-01-01

    This work was aimed at improving the water-resistance stability of CaS:Eu2+,Sm2+phosphor. An organic-inorganic com-posite coating method was adopted in order to obtain ideal phosphor. The phosphor was coated with SiO2 via sol-gel technique and it was also covered by polymethyl methacrylate (PMMA) via dissolution-cohesion technique. Powder X-ray diffraction (XRD) patterns, fluorescence spectroscopy and transmission electron microscopy (TEM) were employed to characterize the phase structures, emission spectrum and surface morphologies, respectively. In addition, the water-resistance stability of the phosphor was tested by soaking the phosphor into deionized water. The results showed that the phase structures remained the same as the uncoated phosphor and the po-sition of the fluorescence peak did not shift after surface treatment. Results showed that the water-resistance stability of the phosphor was improved to some degree. Moreover, the photoluminescence (PL) intensity of the coated phosphors reduced less than 10%of the original phosphors. Though being soaked into deionized water for 50 h, the phosphor coated with 10 wt.%SiO2-10 wt.%PMMA retained 85.9%PL intensity compared to that of the uncoated phosphor. Therefore, it could be concluded that the 10 wt.%SiO2-10 wt.%PMMA composite coating effectively improved the phosphor water resistance and retained its good optical properties.

  19. Synthetic and spectroscopic studies of vanadate glaserites II: Photoluminescence studies of Ln:K{sub 3}Y(VO{sub 4}){sub 2} (Ln=Eu, Er, Sm, Ho, or Tm)

    Energy Technology Data Exchange (ETDEWEB)

    Kimani, Martin M., E-mail: kimani@g.clemson.edu; McMillen, Colin D., E-mail: cmcmill@g.clemson.edu; Kolis, Joseph W., E-mail: kjoseph@clemson.edu

    2015-03-15

    Glaserite-type potassium yttrium double vanadates (K{sub 3}Y(VO{sub 4}){sub 2}) doped with Eu{sup 3+}, Er{sup 3+}, Sm{sup 3+}, Ho{sup 3+}, or Tm{sup 3+} have been synthesized by solid state reactions at 1000 °C for 48 h and their photoluminescence properties investigated. Efficient energy transfer from the vanadate group to the rare earth ion has been established by photoluminescence investigation. Ultraviolet excitation into the metal to ligand charge transfer band of the vanadate groups results in orange-red, blue and green emissions from Eu{sup 3+} (592 nm), Sm{sup 3+} (602 nm), Tm{sup 3+} (475 nm), Er{sup 3+} (553 nm), and Ho{sup 3+} (541–551 nm) dopant ions. The emission intensities of the lanthanide-doped K{sub 3}Y(VO{sub 4}){sub 2} powders were studied as a function of dopant ion concentrations. Over the concentration ranges studied, no emission quenching was observed for Eu{sup 3+} or Ho{sup 3+} dopants, while Er{sup 3+}, Sm{sup 3+} and Tm{sup 3+} dopants did exhibit such effects for dopant ion concentrations greater than 5%, probably due to cross relaxation processes. - Graphical abstract: Synthesis and photoluminescence in vanadate glaserites. - Highlights: • K{sub 3}Y(VO{sub 4}){sub 2} doped with Eu, Er, Tm, Sm, or Ho were synthesized via solid-state reactions. • Photoluminescence properties are investigated. • The lanthanide doped K{sub 3}Y(VO{sub 4}){sub 2} compounds revealed efficient energy transfer from the vanadate group to the rare earth ions. • The presented compounds are promising materials for light display systems, lasers, and optoelectronic devices.

  20. Complexation of amidocarbamoyl phosphine oxides with Ln{sup +3} (Ln = La, Nd, Pm, Sm and Eu) cation series: structural and thermodynamical features

    Energy Technology Data Exchange (ETDEWEB)

    Hosseinnejad, Tayebeh; Kazemi, Tayebeh [Alzahra Univ., Tehran (Iran, Islamic Republic of). Dept. of Chemistry

    2016-05-01

    In the present study, we have mainly investigated the nature of interactions in Ln{sup 3+} (Ln = La, Nd, Pm, Sm, Eu) complexes with amidocarbamoyl methyl phosphine oxide (CMPO) and amidocarbamoyl propyl phosphine oxide (CPPO) ligands based on density functional theory (DFT) approaches. In the first step, thermodynamical properties for complexation of CMPO and CPPO ligands with Ln{sup 3+} cation series have been determined in the gas phase and with the presence of three solvents: n-hexane, chloroform and toluene, via polarized continuum model (PCM) computations. The trend of metal-ligand interaction strength has been analyzed and compared with the trend of ionic hardness within the series of lanthanide cations and different size of alkyl chain of amidocarbamoyl phosphine oxide ligand. The calculated thermochemical results in the gas and solution phases reveals that there is a consistency between increasing trend in the hardness of Ln{sup 3+} cation series and also electron-donating property of alkyl chain with increasing in thermodynamical stability of [Ln-CMPO]{sup 3+} and [Ln-CPPO]{sup 3+} complex series. We have also demonstrated that in the complexation reaction of all complex series, using n-hexane as solvent is more favorable thermodynamically than chloroform and toluene. It should be stated that this issue has been observed in many experiments. Finally, analysis of calculated deformation energies and also the variation in bond order of some selected key bonds in CMPO and CPPO ligands and their corresponded Ln{sup 3+} complexes series show a similar trend with increasing in the hardness of Ln{sup 3+} cation series and electron-donating of alkyl chain of amidocarbamoyl phosphine oxide ligand.

  1. Decay studies of neutron deficient nuclei near the Z=64 subshell: 142Dy, 140,142Tb, 140,142Gd, 140,142Eu, 142Sm, and

    International Nuclear Information System (INIS)

    The electron-capture and β+-decay branchings (EC/β+) and delayed proton decays of A=142 isotopes with 61≤Z≤66 and A=140 isotopes with 63≤Z≤65 were investigated with the OASIS facility on-line at the Lawrence Berkeley Laboratory SuperHILAC. Electron capture and positron-decay emission probabilities have been determined for 142Pm and 142Sm decays, and extensive decay schemes have been constructed for 142Eug(2.34±0.12 s), 142Gd(70.2±0.6 s), 140Eu(1.51±0.02 s), and 140Gd(15.8±0.4 s). Decay schemes for the new isotopes 142Tbg(597±17 ms), 142Tbm(303±17 ms), 142Dy(2.3±0.3 s), 140Eum(125±2 ms), and 140Tb(2.4±0.2 s) are also presented. We have assigned γ rays to these isotopes on the basis of γγ and xγ coincidences, and from half-life determinations. Electron-capture and β+-decay branchings were measured for each decay, and β-delayed proton branchings were determined for 142Dy, 142Tb, and 140Tb decays. QEC values, derived from the measured EC/β+ branchings and the level schemes are compared with those from the Wapstra and Audi mass evaluation and the Liran and Zeldes mass calculation. The systematics of the N=77 isomer decays are discussed, and the intense 0+→1+ and 1+→0+ ground-state beta decays are compared with shell-model predictions for simple spin-flip transitions

  2. Complexation of amidocarbamoyl phosphine oxides with Ln+3 (Ln = La, Nd, Pm, Sm and Eu) cation series: structural and thermodynamical features

    International Nuclear Information System (INIS)

    In the present study, we have mainly investigated the nature of interactions in Ln3+ (Ln = La, Nd, Pm, Sm, Eu) complexes with amidocarbamoyl methyl phosphine oxide (CMPO) and amidocarbamoyl propyl phosphine oxide (CPPO) ligands based on density functional theory (DFT) approaches. In the first step, thermodynamical properties for complexation of CMPO and CPPO ligands with Ln3+ cation series have been determined in the gas phase and with the presence of three solvents: n-hexane, chloroform and toluene, via polarized continuum model (PCM) computations. The trend of metal-ligand interaction strength has been analyzed and compared with the trend of ionic hardness within the series of lanthanide cations and different size of alkyl chain of amidocarbamoyl phosphine oxide ligand. The calculated thermochemical results in the gas and solution phases reveals that there is a consistency between increasing trend in the hardness of Ln3+ cation series and also electron-donating property of alkyl chain with increasing in thermodynamical stability of [Ln-CMPO]3+ and [Ln-CPPO]3+ complex series. We have also demonstrated that in the complexation reaction of all complex series, using n-hexane as solvent is more favorable thermodynamically than chloroform and toluene. It should be stated that this issue has been observed in many experiments. Finally, analysis of calculated deformation energies and also the variation in bond order of some selected key bonds in CMPO and CPPO ligands and their corresponded Ln3+ complexes series show a similar trend with increasing in the hardness of Ln3+ cation series and electron-donating of alkyl chain of amidocarbamoyl phosphine oxide ligand.

  3. Fast synthesis of rare-earth (Pr{sup 3+}, Sm{sup 3+}, Eu{sup 3+} and Gd{sup 3+}) doped bismuth ferrite powders with enhanced magnetic properties

    Energy Technology Data Exchange (ETDEWEB)

    Iorgu, A.I. [Department of Chemical Thermodynamics, “Ilie Murgulescu” Institute of Physical Chemistry, 060021 Bucharest (Romania); Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, University “Politehnica” of Bucharest, 011061 Bucharest (Romania); Maxim, F., E-mail: fmaxim@icf.ro [Department of Chemical Thermodynamics, “Ilie Murgulescu” Institute of Physical Chemistry, 060021 Bucharest (Romania); Matei, C. [Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, University “Politehnica” of Bucharest, 011061 Bucharest (Romania); Ferreira, Liliana Pires [Centro de Física da Matéria Condensada, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa (Portugal); Department of Physics, University of Coimbra, 3004-516 Coimbra (Portugal); Ferreira, P. [Department of Materials and Ceramics Engineering, CICECO, Universidade de Aveiro, 3810-193 Aveiro (Portugal); Cruz, M.M. [Centro de Física da Matéria Condensada, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa (Portugal); Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa (Portugal); Berger, D., E-mail: danaberger01@yahoo.com [Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, University “Politehnica” of Bucharest, 011061 Bucharest (Romania)

    2015-04-25

    Highlights: • Synthesis of rare earth doped bismuth ferrite powders by combustion method. • SEM and TEM were used to investigate the morphology and size of particles. • Effect of Bi substitution with Pr, Sm, Eu and Gd on magnetic properties of powders. - Abstract: Rare-earth (Pr{sup 3+}, Sm{sup 3+}, Eu{sup 3+} and Gd{sup 3+}) doped bismuth ferrite powders were synthesized for the first time by solution combustion method, which is a fast soft chemistry route for obtaining oxide powders. The materials were investigated by X-ray diffraction, Raman spectroscopy, as well as scanning and transmission electron microscopy. A distortion from rhombohedral R3c symmetry, specific to pure bismuth ferrite, to orthorhombic symmetry was observed for all doped samples. The SEM analysis of pure and doped bismuth ferrite powders showed the formation of sintered grains, with faceted cuboids-shaped particles with different size and lower average dimension in the case of doped samples. Magnetic properties were analyzed using SQUID magnetometry, M–H hysteresis loops being measured at 10 K and 300 K. All studied pure and doped bismuth ferrite samples presented high susceptibility values for high magnetic fields indicating strong antiferromagnetic interactions, whereas the behavior at low magnetic field demonstrates the existence of ferromagnetic coupling. Compared to BiFeO{sub 3}, Bi{sub 0.9}RE{sub 0.1}FeO{sub 3} (RE = Pr, Sm, Eu and Gd) powders exhibit higher susceptibility, remanence and coercivity values, Bi{sub 0.9}Eu{sub 0.1}FeO{sub 3} sample displaying the highest remanence and coercivity at room temperature.

  4. A facile approach to synthesize SiO2 · Re2O3 (Re = Y, Eu, La, Sm, Tb, Pr) hollow sphere and its application in drug release

    OpenAIRE

    Li, Zhihua; Zhu, Lin; Liu, Qian; Du, Yu; Wang, Feng

    2013-01-01

    Multifunctional SiO2 · Re2O3 (Re = Y, Eu, La, Sm, Tb, Pr) hollow spheres (HSs) have been fabricated using an acidic Re3+ ion solution. Under ultraviolet radiation, functional HSs emit different colors of light according to the different rare-earth ions embedded into the shell of SiO2 hollow spheres. The as-prepared hollow capsules were characterized by X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, Brunauer-Emmett-Teller method, scanning...

  5. NaLa(MoO{sub 4}){sub 2}: RE{sup 3+} (RE{sup 3+} = Eu{sup 3+}, Sm{sup 3+}, Er{sup 3+}/Yb{sup 3+}) microspheres: the synthesis and optical properties

    Energy Technology Data Exchange (ETDEWEB)

    Gao, Zhiyi [Key Laboratory of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education, College of Physics, Jilin University, Changchun 130023 (China); Wang, Zhiying [College of Chemistry and Biology, Beihua University, Jilin 132013 (China); Fu, Linlin; Yang, Xingxing [Key Laboratory of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education, College of Physics, Jilin University, Changchun 130023 (China); Fu, Zuoling, E-mail: zlfu@jlu.edu.cn [Key Laboratory of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education, College of Physics, Jilin University, Changchun 130023 (China); State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012 (China); Wu, Zhijian [State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China); Jeong, Jung Hyun, E-mail: jhjeong@pknu.ac.kr [Department of Physics, Pukyong National University, Busan 608-737 (Korea, Republic of)

    2015-10-15

    The strong green upconversion (UC) emission were observed in various Er{sup 3+}, Yb{sup 3+} co-doped NaLa(MoO{sub 4}){sub 2} samples synthesized via a hydrothermal route. The UC intensity depends on the dopant concentration, and the optimal UC emission was obtained in NaLa(MoO{sub 4}){sub 2}: 0.02Er{sup 3+}/0.10 Yb{sup 3+}. - Highlights: • The NaLa(MoO{sub 4}){sub 2} microspheres doped with Eu{sup 3+}, Sm{sup 3+} and Er{sup 3+}/Yb{sup 3+} were synthesized by a hydrothermal method. • The effects of the EDTA in the initial solution crystal phase and morphology were studied. • The down-conversion luminescence properties of NaLa(MoO{sub 4}){sub 2}: RE{sup 3+} (RE{sup 3+} = Eu{sup 3+}, Sm{sup 3+}) were investigated. • The UC luminescence properties and mechanism of Er{sup 3+}/Yb{sup 3+} co-doped NaLa(MoO{sub 4}){sub 2} was discussed. - Abstract: NaLa(MoO{sub 4}){sub 2}: RE{sup 3+} (RE{sup 3+} = Eu{sup 3+}, Sm{sup 3+}) microspheres have been synthesized at 180 °C via a facile EDTA-mediated hydrothermal route. X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), photoluminescence (PL) spectra were employed to characterize the samples. It was found that the amount of EDTA in the initial solution was responsible for crystal phase and shape determination. The effect of Eu{sup 3+} and Sm{sup 3+} doping concentrations on the luminescent intensity was also investigated in details. Furthermore, the up-conversion (UC) emissions have been observed in a series of Er{sup 3+}/Yb{sup 3+} co-doped NaLa(MoO{sub 4}){sub 2} samples. Concentration dependent studies revealed that the optimal composition was realized for a 2% Er{sup 3+} and 10% Yb{sup 3+}-doping concentration.

  6. Dielectric function of SmS

    International Nuclear Information System (INIS)

    The zone-center longitudinal optical phonon of semiconducting SmS shows a 10% softening with respect to that of EuS. This result confirms the lattice-dynamical model prediction and provides first experimental evidence for the existence of an anomalous dipolar charge deformability of the Sm2+ ion in SmS. (author)

  7. How to be Brilliant at Algebra

    CERN Document Server

    Webber, Beryl

    2010-01-01

    How to be Brilliant at Algebra is contains 40 photocopiable worksheets designed to improve students' understanding of number relationships and patterns. They will learn about: odds and evens; patterns; inverse operations; variables; calendars; equations; pyramid numbers; digital root patterns; prime numbers; Fibonacci numbers; Pascal's triangle.

  8. Brilliant the evolution of artificial light

    CERN Document Server

    Brox, Jane

    2010-01-01

    Brilliant, reminiscent of Lewis Hyde's The Gift in its reach and of Timothy Egan's The Worst Hard Time in its haunting evocation of human lives, offers a sweeping view of a surprisingly revealing aspect of human history-from the stone lamps of the Pleistocene to the LEDs embedded in fabrics of the future.

  9. The passage of lanthanides (Cd-144, Nd-147, Sm-153, Eu-155 and Tb-160) into fetus and newborn after intravenous contamination of rats and estimation of absorbed dose in whole body and gastrointestinal tract

    International Nuclear Information System (INIS)

    The purpose of the study was the determination of the passage of certain lanthanum elements (147Nd, 153Sm, 155Eu and 160Tb) from maternal blood through the placenta to the fetus in the second and third weeks of pregnancy and also estimation of absorbed dose in gastrointestinal tract in newborn rats contaminated with 147Nd, 153Sm, 155Eu and 160Tb. The study demonstrated that the lanthanum elements passed across the placental barrier. Placental retention was several times higher in late pregnancy (in the case of 160Tb it was even 16 - fold greater). In the last period of pregnancy this passage increased with increasing mass number of the elements (Nd160Tb (17%) and decreased with the drop of molecular weight of radionuclides. For all lanthanides tested, the dose of γ-radiation absorbed by newborns could be neglected since it comprised only 0.5% of β-radiation. The absorbed dose of β-radiation during the first week of life of new newborns fed by mother injected with 37 kBq of radionuclides ranged from 204 mGy for 160Tb to 0.23 mGy for 144Ce. (author). 15 refs., 5 figs., 4 tabs

  10. Brilliant Light in Life and Material Sciences

    CERN Document Server

    Tsakanov, Vasili

    2007-01-01

    The present book contains an excellent overview of the status and highlights of brilliant light facilities and their applications in biology, chemistry, medicine, materials and environmental sciences. Overview papers on diverse fields of research by leading experts are accompanied by the highlights in the near and long-term perspectives of brilliant X-Ray photon beam usage for fundamental and applied research. The book includes advanced topics in the fields of high brightness photon beams, instrumentation, the spectroscopy, microscopy, scattering and imaging experimental techniques and their applications. The book is strongly recommended for students, engineers and scientists in the field of accelerator physics, X-ray optics and instrumentation, life, materials and environmental sciences, bio and nanotechnology.

  11. How to be Brilliant at Numbers

    CERN Document Server

    Webber, Beryl

    2010-01-01

    How to be Brilliant at Numbers will help students to develop an understanding of numbers, place value, fractions and decimals. They will develop the language of number, and of the relationships between numbers. They will also use mathematics to solve problems and will develop mathematical reasoning. Using the worksheets in this book, pupils will learn about: ancient Greek numbers; coins; digits; consecutive numbers; magic ladders; fractions; matching pairs; multiples of 10; rounding; decimal un

  12. How to be Brilliant at Mental Arithmetic

    CERN Document Server

    Webber, Beryl

    2010-01-01

    How to be Brilliant at Mental Arithmetic addresses the twin pillars of mental arithmetic - mental recall and mental agility. Mental recall depends on familiarity with number bonds and plenty of opportunity to practise. Mental agility depends more on confidence with the number system and the four operations. Using the worksheets in this book, students will learn about: tens and units; addition, subtraction, multiplication and division; addition shortcuts; product squares; quick recall; number se

  13. Photocatalytic degradation of an azo dye using Bi{sub 3.25}M{sub 0.75}Ti{sub 3}O{sub 12} nanowires (M = La, Sm, Nd, and Eu)

    Energy Technology Data Exchange (ETDEWEB)

    Lin, Xue, E-mail: jlsdlinxue@126.com [College of Chemistry, Key Laboratory of Preparation and Application Environmentally Friendly Materials of the Ministry of Education, Jilin Normal University, Siping 136000 (China); School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013 (China); Guan, Qingfeng [School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013 (China); Zou, Chunjie; Liu, Tingting; Zhang, Yao; Liu, Chunbo; Zhai, Hongjv [College of Chemistry, Key Laboratory of Preparation and Application Environmentally Friendly Materials of the Ministry of Education, Jilin Normal University, Siping 136000 (China)

    2013-05-01

    Highlights: ► BMT nanostructures with high photocatalytic activity were successfully synthesized through a facile template-free hydrothermal method. ► BMT samples were characterized by various characterization technologies. ► BMT samples presented outstanding visible-light-induced photocatalytic performance. ► The photoactivity of BMT is highly affected by its morphology. ► BMT nanowires showed the highest photocatalytic activity. -- Abstract: Bi{sub 3.25}M{sub 0.75}Ti{sub 3}O{sub 12} (BMT, M = La, Sm, Nd, and Eu) nanowires were synthesized through simple hydrothermal route and their structural and photocatalytic properties were investigated. XRD results indicated that these compounds are of layered perovskites structure. In addition, the band gaps of Bi{sub 3.25}La{sub 0.75}Ti{sub 3}O{sub 12} (BLT), Bi{sub 3.25}Sm{sub 0.75}Ti{sub 3}O{sub 12} (BST), Bi{sub 3.25}Nd{sub 0.75}Ti{sub 3}O{sub 12} (BNT), and Bi{sub 3.25}Eu{sub 0.75}Ti{sub 3}O{sub 12} (BET) were estimated to be about 2.403, 2.594, 2.525, and 2.335 eV, respectively. Their photocatalytic activities were evaluated by photocatalytic degradation of methyl orange (MO) under visible light irradiation (λ > 420 nm). Bi{sub 3.25}M{sub 0.75}Ti{sub 3}O{sub 12} (M = La, Sm, Nd, and Eu) showed markedly higher catalytic activity compared to traditional N doped TiO{sub 2} (N-TiO{sub 2}) and pure bismuth titanate (Bi{sub 4}Ti{sub 3}O{sub 12}, BIT) for MO photocatalytic degradation under visible light irradiation. The high photocatalytic performance of Bi{sub 3.25}M{sub 0.75}Ti{sub 3}O{sub 12} photocatalysts could be attributed to the strong visible light absorption and the recombination restraint of the e{sup −}/h{sup +} pairs resulting from doping of rare earth metal ions. Furthermore, BET nanowires exhibited the highest photocatalytic activity.

  14. An EPR study of the phase transitions and Gd3+ zero-field splitting parameters in RbR(SO4)2.4H2O (R = Er, Dy, Pr, Nd, Sm, Eu)

    International Nuclear Information System (INIS)

    X-band (∼9.6 GHz) electron paramagnetic resonance measurements were carried out on Gd3+-doped RbEr(SO4)2.4H2O and RbDy(SO4)2.4H2O single crystals in the 4.2-295 K temperature range, and on Gd3+-doped RbPr(SO4)2.4H2O, RbNd(SO4)2.4H2O, RbSm(SO4)2.4H2O and RbEu(SO4)2.4H2O single crystals in the 4.2-110 K range. Gd3+ room-temperature spin-Hamiltonian parameters were estimated in RbR(SO4)2.4H2O samples with R = Er, Dy. The following phase transitions undergone by the various host crystals were found to occur: three second-order phase transitions in RbDy(SO4)2.4H2O at 260.3 K, 226.9 K and 65.4 K, and second-order and first-order phase transitions in RbEr(SO4)2.4H2O at 228.1 and 68.8 K, respectively. In addition, there were observed first-order phase transitions in each of RbNd(SO4)2.4H2O (at 72.1 K), RbSm(SO4)2.4H2O (at 70.3 K) and RbEu(SO4)2.4H2O (at 79.4 K), and two in RbPr(SO4)2.4H2O (at 71.4 and 9.7 K) crystals, in the 4.2-110 K range, in addition to those reported previously in the 110-295 K range. Systematics of the various phase transitions occurring in RbR(SO4)2.4H2O (R = Pr, Nd, Sm, Er, Dy, Eu) single crystals in the temperature range 4.2-295 K, and those of Gd3+ zero-field splitting parameters at room temperature, have been deduced. (author)

  15. Superconductivity above 90 K in the square-planar compound system ABa2Cu3O(6 + x) with A = Y, La, Nd, Sm, Eu, Gd, Ho, Er, and Lu

    Science.gov (United States)

    Hor, P. H.; Meng, R. L.; Wang, Y. Q.; Gao, L.; Huang, Z. J.

    1987-01-01

    Superconductivity has been found in the 90-K range in ABa2Cu3O(6 + x) with A = La, Nd, Sm, Eu, Gd, Ho, Er, and Lu in addition to Y. The results suggest that the unique square-planar Cu atoms, each surrounded by four or six oxygen atoms, are crucial to the superconductivity of oxides in general. In particular, the high Tc of ABa2Cu3O(6 + x) is attributed mainly to the quasi-two-dimensional assembly of the CuO2-Ba-CuO(2 + x)Ba-CuO2 layers sandwiched between two A layers, with particular emphasis in the CuO(2 + x) layers. Higher-Tc oxides are predicted for compounds with bigger assemblies of CuO2 layers coupled by Ba layers.

  16. Thermal decomposition of RE(C2H5CO2)3·H2O (RE = Dy, Tb, Gd, Eu and Sm)

    DEFF Research Database (Denmark)

    Grivel, Jean-Claude

    2014-01-01

    place below 120 °C, all salts decompose into dioxycarbonates with simultaneous release of CO2 and C2H5COC2H5 (3-pentanone) between 250 and 460 °C. However, whereas the anhydrous Dy-, Tb-, and Gd-propionates appear to transform into RE2O2CO3 (rare earth [RE] = Dy, Tb, Gd) in a single step, an...... intermediate stage involving a RE2O(C2H5CO2)4 composition was evidenced in the case of the Eu- and Sm-propionates. For all compounds, further decomposition of RE2O2CO3 into the corresponding sesquioxides (RE2O3) is accompanied by the release of CO2. The thermal decomposition of Dy- and Tb-propionates occurs...

  17. CaS∶Eu,Sm荧光粉表面二氧化硅包覆对其光激励发光特性的影响%Effects of Silica-encapsulated CaS∶ Eu,Sm Phosphors on Optically Stimulated Luminescence Properties

    Institute of Scientific and Technical Information of China (English)

    盖敏强; 陈朝阳; 范艳伟; 王军华; 谢永新

    2013-01-01

    The objective of this work was to improve the stability and reproducibility of CaS∶ Eu,Sm phosphors in a real-time dosimetry system.Different volumes of tetraethyl orthosilicate,were used as precursor and coated onto CaS ∶ Eu,Sm phosphors by the sol-gel method.The luminescence properties and water resistance of the phosphors were evaluated using a fluorescence spectrometer and an acidometer respectively.The results show that 5% (mass fraction) of silica coating effectively improve their water resistance with minimum loss of light emission.The optically stimulated luminescence (OSL) decay and dose response of coated CaS∶ Eu,Sm phosphors offer an easy evaluation of the annealing time and specify dose.The dose characteristic is linear from 0.1 to 300 Gy.The 5% SiO2-coated CaS∶ Eu,Sm phosphors'variation of the reusability is below 2% at dose of 1 Gy.The amount of surface coating significantly affected the OSL signal,which became more pronounced with the increasing radiation dose.A novel dosimetry system based on the OSL technique is proposed for real-time measurement.%改进了CaS∶ Eu,Sm荧光粉在实时剂量计系统中的稳定性和实用性.以不同体积的正硅酸乙酯作为前驱体,采用溶胶凝胶法对CaS∶ Eu,Sm荧光粉进行表面包覆.分别使用荧光分光光度计和酸度计对荧光粉的发光特性和防水特性进行表征.实验结果显示当质量分数为5%时,包覆层能明显提高荧光粉的稳定性且不影响荧光粉的发光强度.从材料的光激励发光和剂量响应测试实验中可以得出材料的退火特性以及相应的辐射剂量值.以CaS∶ Eu,Sm荧光粉为基础的辐射剂量测试系统显示在0.1 ~300 Gy范围内具有良好的线性关系.结果显示表面包覆层明显抑制光激励发光特性,而且随着辐射剂量的增加,这种影响愈来愈显著.最后,我们提出了以光激励发光技术为基础的辐射剂量在线测试改进系统.

  18. Effect of pressure on octahedral distortions in RCrO3 (R = Lu, Tb, Gd, Eu, Sm): the role of R-ion size and its implications

    International Nuclear Information System (INIS)

    The effect of rare-earth ion size on the octahedral distortions in rare-earth chromites (RCrO3, R = Lu, Tb, Gd, Eu, Sm) crystallizing in the orthorhombic structure has been studied using Raman scattering and synchrotron powder x-ray diffraction up to 20 GPa. From our studies on RCrO3 we found that the octahedral tilts (distortions) increase with pressure. This is contrary to the earlier report which suggests that in LaCrO3, the distortions decrease with pressure leading to a more ordered phase at high pressure. Here, we observe that the rate of increase in distortion decreases with the increase in R-ion radii. This occurs due to the reduction in the compression of RO12 polyhedra with a corresponding increase in the compression of the CrO6 octahedra with increasing R-ion radii. From the Raman studies, we predict a critical R-ion radii, above which we expect the distortions in RCrO3 to reduce with increasing pressure leading to what is observed in the case of LaCrO3. These Raman results are consistent with our pressure dependent structural studies on RCrO3 (R = Gd, Eu, Sm). Also, our results suggest that the pressure dependence of Néel temperature, T NCr, (where the Cr3+ spin orders) in RCrO3 is mostly affected by the compressions of Cr-O bonds rather than the alteration of octahedral tilts. (papers)

  19. Analýza směrnice EU č. 2006/42/ES z hlediska požadavků ISO 9001:2000

    OpenAIRE

    Adámková, Marie

    2007-01-01

    The paper is focused on analysis of the direction EU for machinery industry 2006/42/ES and its part about the QMS. The aim of the thesis is to give the commentary of the direction according to the ISO 9001:2000 and to help to implement this system into the organization.

  20. Brilliant inventions by girls and boys

    International Nuclear Information System (INIS)

    This book reports the brilliant inventions by children. The titles of the inventions are glasses which shine at height, a chair and a table for the disabled, emergency signal light at night, a bean sprout cultivator using a plastic bottle, signal light attached timer, alcohol lamp 3-at-a-time, a flower pot with wick, safe swimming suit, electronic pot for future, a useful screwdriver, bath tower for kids, handles of pots and pans for camping which are not hot, snow scraper of greenhouse, heating shoes for preventing frostbite, and utility furniture.

  1. A facile approach to synthesize SiO2 · Re2O3 (Re = Y, Eu, La, Sm, Tb, Pr) hollow sphere and its application in drug release.

    Science.gov (United States)

    Li, Zhihua; Zhu, Lin; Liu, Qian; Du, Yu; Wang, Feng

    2013-01-01

    Multifunctional SiO2 · Re2O3 (Re = Y, Eu, La, Sm, Tb, Pr) hollow spheres (HSs) have been fabricated using an acidic Re3+ ion solution. Under ultraviolet radiation, functional HSs emit different colors of light according to the different rare-earth ions embedded into the shell of SiO2 hollow spheres. The as-prepared hollow capsules were characterized by X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, Brunauer-Emmett-Teller method, scanning electron microscopy, and energy-dispersive spectrometry. Drug loading and release experiments have been carried out using SiO2 · Eu2O3 HSs that acted as drug carriers. The results demonstrate that the multifunctional HSs exhibit a high storage capacity and the ability of retaining drug stability and activity, which indicates that the as-synthesized fluorescent hollow capsules are a potential candidate as drug delivery materials. PMID:24144278

  2. Synthesis of rare earth (Pr, Nd, Sm, Eu and Gd) hydroxide and oxide nanorods (nanobundles) by a widely applicable precipitation route

    Energy Technology Data Exchange (ETDEWEB)

    Xin Ying; Wang Zhongpeng [Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, College of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Rd., Jinan 250022 (China); Qi Yongxin [School of Material Science and Technology, Shandong University, Jinan 250100 (China); Zhang Zhaoliang, E-mail: zhangzhaoliang@sdu.edu.c [Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, College of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Rd., Jinan 250022 (China); Zhang Shuxiang [Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, College of Chemistry and Chemical Engineering, University of Jinan, 106 Jiwei Rd., Jinan 250022 (China)

    2010-09-24

    Research highlights: {yields} Rare earth hydroxide nanorods (nanobundles) were prepared by a precipitation method. {yields} Any templates or surfactants were not added. {yields} The nucleation and growth of nanorods occurred without a hydrothermal treatment. {yields} The morphology can be controlled by the aging time and precipitation agents. {yields} The {sup 5}D{sub 0}-{sup 7}F{sub 2} transition of Eu{sub 2}O{sub 3} nanobundles decreased greatly compared with the bulk. - Abstract: Rare earth hydroxide and oxide nanorods (nanobundles) have been synthesized without the addition of any templates/surfactants by a simple precipitation method under ambient temperature and pressure. The products are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), field-emission scanning electron microscopy (FESEM), thermogravimetry (TG) and N{sub 2} adsorption/desorption. It is demonstrated that the rare earth hydroxide nanorods (nanobundles) have the diameter of 10-150 nm and the length of 30-600 nm. The corresponding oxides can be obtained by calcination, which preserved the nanorod (nanobundle) morphologies though a small shrinkage in sizes is observed. The influences of the aging time and precipitation agent on the formation of nanorods (nanobundles) are investigated. Accordingly the crystallization mechanism is proposed. The nucleation and growth of the hydroxide nanorods may occur in the precipitation process at relatively low (room) temperature and normal pressure without a long-time and high-temperature (pressure) hydrothermal treatment. The photoluminescence (PL) analysis is used to investigate the optical properties of the Eu{sub 2}O{sub 3} nanobundles and a broadened luminescent spectrum is observed. The precipitation method is simple, highly reproducible, inexpensive, and widely applicable for the large-scale industrial production.

  3. Structural and Magnetothermal Properties of Compounds: Yb5SixGe4-x,Sm5SixGe4-x, EuO, and Eu3O4

    Energy Technology Data Exchange (ETDEWEB)

    Kyunghan Ahn

    2007-05-09

    The family of R{sub 5}Si{sub x}Ge{sub 4-x} alloys demonstrates a variety of unique physical phenomena related to magneto-structural transitions associated with reversible breaking and reforming of specific bonds that can be controlled by numerous external parameters such as chemical composition, magnetic field, temperature, and pressure. Therefore, R{sub 5}Si{sub x}Ge{sub 4-x} systems have been extensively studied to uncover the mechanism of the extraordinary magneto-responsive properties including the giant magnetoresistance (GMR) and colossal magnetostriction, as well as giant magnetocaloric effect (GMCE). Until now, more than a half of possible R{sub 5}Si{sub x}Ge{sub 4-x} pseudobinary systems have been completely or partially investigated with respect to their crystallography and phase relationships (R = La, Pr, Nd, Gd, Tb, Dy, Er, Lu, Y). Still, there are other R{sub 5}Si{sub x}Ge{sub 4-x} systems (R = Ce, Sm, Ho, Tm, and Yb) that are not studied yet. Here, we report on phase relationships and structural, magnetic, and thermodynamic properties in the Yb{sub 5}Si{sub x}Ge{sub 4-x} and Sm{sub 5}Si{sub x}Ge{sub 4-x} pseudobinary systems, which may exhibit mixed valence states. The crystallography, phase relationships, and physical properties of Yb{sub 5}Si{sub x}Ge{sub 4-x} alloys with 0 {le} x {le} 4 have been examined by using single crystal and powder x-ray diffraction at room temperature, and dc magnetization and heat capacity measurements between 1.8 K and 400 K in magnetic fields ranging from 0 to 7 T. Unlike the majority of R{sub 5}Si{sub x}Ge{sub 4-x} systems studied to date, where R is the rare earth metal, all Yb-based germanide-silicides with the 5:4 stoichiometry crystallize in the same Gd{sub 5}Si{sub 4}-type structure. The magnetic properties of Yb{sub 5}Si{sub x}Ge{sub 4-x} materials are nearly composition-independent, reflecting the persistence of the same crystal structure over the whole range of x from 0 to 4. Both the crystallographic and

  4. Origin of superconducting carriers in 'non-doped' T'-(La,RE)2CuO4 (RE=Sm, Eu, Gd, Tb, Lu, and Y) prepared by molecular beam epitaxy

    International Nuclear Information System (INIS)

    We have performed a systematic investigation of the variations of the lattice constants with substituent rare-earth element concentration x in the nominally undoped superconductors T'-La2-x3+REx3+CuO4 (RE=Sm, Eu, Gd, Tb, Lu, and Y), which we have recently discovered using MBE. The results show both the in-plane and out-of-plane lattice constants (a0 and c0 linearly decrease with x, whose extrapolation to x=2 agrees well with the reported a0 and c0 values for each T'-RE2CuO4. This behavior is what one would expect simply from the ionic size difference between La3+ and RE3+. The absence of the Cu-O bond stretching due to electron-doping, which is commonly observed in electron-doped T' and infinite-layer superconductors, implies that electron-doping via oxygen deficiencies is, at least, not a main source of charge carriers

  5. Synthesis and structure of a new family of 3d–4f heterometallic compounds Rb7LnFe6O2(PO4)8 (Ln=Sm, Eu, Gd, Dy): Magnetic properties of the Sm-, Gd-, Dy-derivatives

    International Nuclear Information System (INIS)

    A new family of mixed lanthanide(III) and iron(III) oxo-phosphate phases, Rb7LnFe6O2(PO4)8 (Ln=Sm 1, Eu 2, Gd 3, Dy 4), was isolated by using a high-temperature, solid-state method in molten-salt media. The X-ray single-crystal structure analysis shows that these isomorphic derivatives crystallize in a triclinic space group P–1 (no. 2); Z=1. The 3-D framework of these 3d–4f oxo-phosphates are comprised of LnO6 octahedral, FeO5 trigonal bipyramidal (tbp), and μ3-oxo [Fe4O18] tetrameric units interconnected through PO4 tetrahedra. The preliminary results of the temperature-dependent magnetic susceptibility measurements for selected compounds (1, 3, 4) reveal antiferromagnetic-like behavior. 1 shows a weak antiferromagnetric ordering at TN=∼7 K while others show little evidence of long-range magnetic order down to 2 K. All three compounds have measured magnetic moments significantly smaller than the expected values. - Graphical abstract: The extended framework is described by the connectivity of three distinct types of paramagnetic units. The temperature-dependent, lower than expected effective magnetic moments are reported. Highlights: ► A new family of mixed lanthanide(III) and iron(III) oxo-phosphates is isolated. ► Features PO4-linked paramagnetic units of LnO6, FeO5, and μ3-oxo [Fe4O18]. ► Sm-derivative orders at TN∼7 K while Gd- and Dy-derivatives show absence of order.

  6. Brilliant Star in a Colourful Neighbourhood

    Science.gov (United States)

    2010-07-01

    A spectacular new image from ESO's Wide Field Imager at the La Silla Observatory in Chile shows the brilliant and unusual star WR 22 and its colourful surroundings. WR 22 is a very hot and bright star that is shedding its atmosphere into space at a rate many millions of times faster than the Sun. It lies in the outer part of the dramatic Carina Nebula from which it formed. Very massive stars live fast and die young. Some of these stellar beacons have such intense radiation passing through their thick atmospheres late in their lives that they shed material into space many millions of times more quickly than relatively sedate stars such as the Sun. These rare, very hot and massive objects are known as Wolf-Rayet stars [1], after the two French astronomers who first identified them in the mid-nineteenth century, and one of the most massive ones yet measured is known as WR 22. It appears at the centre of this picture, which was created from images taken through red, green and blue filters with the Wide Field Imager on the MPG/ESO 2.2-metre telescope at ESO's La Silla Observatory in Chile. WR 22 is a member of a double star system and has been measured to have a mass at least 70 times that of the Sun. WR 22 lies in the southern constellation of Carina, the keel of Jason's ship Argo in Greek mythology. Although the star lies over 5000 light-years from the Earth it is so bright that it can just be faintly seen with the unaided eye under good conditions. WR 22 is one of many exceptionally brilliant stars associated with the beautiful Carina Nebula (also known as NGC 3372) and the outer part of this huge region of star formation in the southern Milky Way forms the colourful backdrop to this image. The subtle colours of the rich background tapestry are a result of the interactions between the intense ultraviolet radiation coming from hot massive stars, including WR 22, and the vast gas clouds, mostly hydrogen, from which they formed. The central part of this enormous complex

  7. Brilliant blue G attenuates lipopolysaccharidemediated microglial activation and inflammation

    Institute of Scientific and Technical Information of China (English)

    Kui Lu; Jue Wang; Bin Hu; Xiaolei Shi; Junyi Zhou; Yamei Tang; Ying Peng

    2013-01-01

    Previous studies have confirmed that oxidized adenosine triphosphate, a P2X7 receptor antagonist, attenuates lipopolysaccharide-mediated microglial activation and inflammatory expression following neuronal damage in rat brain. NaCl and temperature may affect the potency of oxidized adenosine triphosphate. Brilliant blue G is a derivative of a widely used food additive and has little toxicity. This study explored the effects of brilliant blue G, a selective P2X7 receptor antagonist, on microglial activation and inflammation. Results demonstrated that brilliant blue G inhibited the release of cyclooxygenase-2 and interleukin-6 in BV2 cells. Immunofluorescence displayed that brilliant blue G could suppress lipopolysaccharide-induced microglial activation. This study used RNA interference to block P2X7 receptor expression and found that small interfering RNA also suppressed the release of cyclooxygenase-2 and interleukin-6 in BV2 cells. These results suggested that downregulation of the P2X7 receptor by brilliant blue G was involved in the inhibition of microglial activation and inflammation.

  8. Refined exposure assessment for Brilliant Black BN (E 151

    Directory of Open Access Journals (Sweden)

    European Food Safety Authority

    2015-01-01

    Full Text Available The European Food Safety Authority (EFSA carried out an exposure assessment of Brilliant Black BN (E 151, taking into account new information on its use as a food additive in foods. In 2010, the EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS adopted a scientific opinion on the re-evaluation of Brilliant Black BN and concluded that dietary exposure in 1- to 10-year-old children at the high level may exceed the Acceptable Daily Intake (ADI for Brilliant Black BN of 5 mg/kg body weight (bw/day at the upper end of the range. Following this conclusion, the European Commission requested that EFSA performs a refined exposure assessment for this food colour. Data on the presence of Brilliant Black BN in foods were requested from relevant stakeholders through a call for usage and concentration data. Usage levels were provided to EFSA for 11 out of 37 food categories in which Brilliant Black is authorised. In addition, 4 337 analytical results were also reported to EFSA, with the majority of values being below the limit of detection (LOD or limit of quantification (LOQ. Exposure assessment was performed using the EFSA Comprehensive Food Consumption Database. Three scenarios were considered: (1 exposure estimates based on Maximum Permitted Levels (MPLs, (2 a refined brand-loyal exposure scenario, and (3 a refined non-brand-loyal exposure scenario. Considering the first scenario, high exposure levels (95th percentile exceeded the ADI for toddlers and children in four dietary surveys. In comparison with the previous assessment, for both children and adults, the current mean exposure estimates are of the same order of magnitude, whereas the 95th percentile exposure is lower, particularly in adults. The mean and high-level exposure estimates of Brilliant Black BN are below the ADI for all population groups when considering the refined scenarios (brand-loyal and non-brand-loyal.

  9. EPR study of Gd3+-doped RbR(SO4)2·4H2O (R=Pr,Nd,Sm,Eu) single crystals: Phase transitions and spin-Hamiltonian parameters

    International Nuclear Information System (INIS)

    Extensive EPR measurements were carried out in the temperature range 100 endash 300 K. The room-temperature data indicate that Gd3+ ions substitute equally for R3+ ions at the two magnetically inequivalent sites in the unit cell, and that the site symmetry of the Gd3+ ion is monoclinic. The Gd3+ room-temperature spin-Hamiltonian parameters and linewidths were estimated. The phase transition temperatures (Tc) were determined to be 175±1K (first order) in RbPr(SO4)2·4H2O, 178.5±1K (first order) in RbNd(SO4)2·4H2O, 232±0.5K (second order) in RbSm(SO4)2·4H2O, and 230.5±0.5K (second order) in RbEu(SO4)2·4H2O. In RbPr(SO4)2·4H2O and RbNd(SO4)2·4H2O, the occurrence of the first-order phase transitions was deduced from abrupt changes in the behavior of the linewidth, zero-field splitting, and line positions, and coexistence of lines observed below and above Tc. In addition, there were observed occurrences of two more phase transitions second order in nature in RbPr(SO4)2·4H2O (Tc1=261K, Tc2=207.5K) and in RbNd(SO4)2·4H2O (Tc1=250K, Tc2=219.5K); these were not as sharply defined as the preceding ones. Below Tc, for all the crystals, the symmetry of the crystals was found to be lower than monoclinic, the four ions in the unit cell becoming magnetically inequivalent from each other. The observed second-order phase transitions in the four crystals were found to be in agreement with Landau theory of second-order phase transitions; the critical exponent was determined to be β congruent 0.51. copyright 1997 The American Physical Society

  10. Brilliant camouflage : photonic crystals in the diamond weevil, Entimus imperialis

    NARCIS (Netherlands)

    Wilts, Bodo D.; Michielsen, Kristel; Kuipers, Jeroen; Raedt, Hans De; Stavenga, Doekele G.

    2012-01-01

    The neotropical diamond weevil, Entimus imperialis, is marked by rows of brilliant spots on the overall black elytra. The spots are concave pits with intricate patterns of structural-coloured scales, consisting of large domains of three-dimensional photonic crystals that have a diamond-type structur

  11. Synthesis and luminescent properties of Ca{sub 2}La{sub 8}(GeO{sub 4}){sub 6}O{sub 2}:RE{sup 3+} (RE{sup 3+}=Eu{sup 3+}, Tb{sup 3+}, Dy{sup 3+}, Sm{sup 3+}, Tm{sup 3+}) phosphors

    Energy Technology Data Exchange (ETDEWEB)

    Que, Meidan; Ci, Zhipeng, E-mail: cizhp@lzu.edu.cn; Wang, Yuhua, E-mail: wyh@lzu.edu.cn; Zhu, Ge; Shi, Yurong; Xin, Shuangyu

    2013-12-15

    A new Ca{sub 2}La{sub 8}(GeO{sub 4}){sub 6}O{sub 2} (CLGO) compound has been synthesized via solid-state reaction process for the first time. The crystal structure of CLGO was refined and determined by Maud Program. The photoluminescence spectra (PL), cathodoluminescence spectra (CL), and lifetimes as well as temperature dependence of photoluminescence of CLGO:RE{sup 3+} (RE{sup 3+}=Eu{sup 3+}, Tb{sup 3+}, Dy{sup 3+}, Sm{sup 3+}, Tm{sup 3+}) were investigated in detail. Under the excitation of ultraviolet, CLGO:RE{sup 3+} (RE{sup 3+}=Eu{sup 3+}, Tb{sup 3+}, Dy{sup 3+}, Sm{sup 3+}, Tm{sup 3+}) show red, green, yellow, orange, violet emission, respectively. -- Highlights: • A new Ca{sub 2}La{sub 8}(GeO{sub 4}){sub 6}O{sub 2} (CLGO) compound has been synthesized for the first time. • The crystal structure of CLGO has been refined by Maud refinement method. • Photoluminescence spectra of CLGO:RE{sup 3+} were firstly investigated.

  12. Preparation and study of properties of SmS base alloys

    International Nuclear Information System (INIS)

    By reducing sesquisulphides of Sm and Yb with a metallic rare-earth element (Yb, Sm, Eu), monosulphides of these elements and solid solutions on their basis have been obtained. By varying the content in SmS of the other rare-earth element (Yb or Eu), it is possible to effectively control the electrophysical properties (electric conductivity, heat conductivity) of alloys based on it by changing the energetic position of f-states, their energy density and their population with electrons

  13. Brilliant camouflage: photonic crystals in the diamond weevil, Entimus imperialis

    OpenAIRE

    Wilts, Bodo D.; Michielsen, Kristel; Kuipers, Jeroen; De Raedt, Hans; Stavenga, Doekele G.

    2012-01-01

    The neotropical diamond weevil, Entimus imperialis, is marked by rows of brilliant spots on the overall black elytra. The spots are concave pits with intricate patterns of structural-coloured scales, consisting of large domains of three-dimensional photonic crystals that have a diamond-type structure. Reflectance spectra measured from individual scale domains perfectly match model spectra, calculated with anatomical data and finite-difference time-domain methods. The reflections of single dom...

  14. Europe Unveils 20-Year Plan for Brilliant Future in Astronomy

    Science.gov (United States)

    2008-11-01

    Astronomy is enjoying a golden age of fundamental, exciting discoveries. Europe is at the forefront, thanks to 50 years of progress in cooperation. To remain ahead over the next two to three decades, Europe must prioritise and coordinate the investment of its financial and human resources even more closely. The ASTRONET network, backed by the entire European scientific community, supported by the European Commission, and coordinated by the CNRS, today presents its Roadmap for a brilliant future for European astronomy. ESO's European Extremely Large Telescope is ranked as one of two top-priority large ground-based projects. Astronet and the E-ELT ESO PR Photo 43a/08 The E-ELT Europe is a leader in astronomy today, with the world's most successful optical observatory, ESO's Very Large Telescope, and cutting-edge facilities in radio astronomy and in space. In an unprecedented effort demonstrating the potential of European scientific cooperation, all of European astronomy is now joining forces to define the scientific challenges for the future and construct a common plan to address them in a cost-effective manner. In 2007, a top-level Science Vision was prepared to assess the most burning scientific questions over the next quarter century, ranging from dark energy to life on other planets. European astronomy now presents its Infrastructure Roadmap, a comprehensive 20-year plan to coordinate national and community investments to meet these challenges in a cost-effective manner. The Roadmap not only prioritises the necessary new frontline research facilities from radio telescopes to planetary probes, in space and on the ground, but also considers such key issues as existing facilities, human resources, ICT infrastructure, education and outreach, and cost -- of operations as well as construction. This bold new initiative -- ASTRONET -- was created by the major European funding agencies with support from the European Commission and is coordinated by the National Institute

  15. Europe Unveils 20-Year Plan for Brilliant Future in Astronomy

    Science.gov (United States)

    2008-11-01

    Astronomy is enjoying a golden age of fundamental, exciting discoveries. Europe is at the forefront, thanks to 50 years of progress in cooperation. To remain ahead over the next two to three decades, Europe must prioritise and coordinate the investment of its financial and human resources even more closely. The ASTRONET network, backed by the entire European scientific community, supported by the European Commission, and coordinated by the CNRS, today presents its Roadmap for a brilliant future for European astronomy. ESO's European Extremely Large Telescope is ranked as one of two top-priority large ground-based projects. Astronet and the E-ELT ESO PR Photo 43a/08 The E-ELT Europe is a leader in astronomy today, with the world's most successful optical observatory, ESO's Very Large Telescope, and cutting-edge facilities in radio astronomy and in space. In an unprecedented effort demonstrating the potential of European scientific cooperation, all of European astronomy is now joining forces to define the scientific challenges for the future and construct a common plan to address them in a cost-effective manner. In 2007, a top-level Science Vision was prepared to assess the most burning scientific questions over the next quarter century, ranging from dark energy to life on other planets. European astronomy now presents its Infrastructure Roadmap, a comprehensive 20-year plan to coordinate national and community investments to meet these challenges in a cost-effective manner. The Roadmap not only prioritises the necessary new frontline research facilities from radio telescopes to planetary probes, in space and on the ground, but also considers such key issues as existing facilities, human resources, ICT infrastructure, education and outreach, and cost -- of operations as well as construction. This bold new initiative -- ASTRONET -- was created by the major European funding agencies with support from the European Commission and is coordinated by the National Institute

  16. Determinación del coeficiente piroeléctrico del sistema ferroeléctrico cerámico de Pb0.88Ln0.08Ti0.98Mn0.02O3 (Ln=La, Sm, Eu y su aplicación en detectores de infrarrojo

    Directory of Open Access Journals (Sweden)

    Suaste-Gómez, E.

    2004-12-01

    Full Text Available In this work the dielectric and pyroelectric characteristics of the ferroelectric ceramic system of Pb0.88(Ln0.08Ti0.98Mn0.02O3 (Ln = La, Sm, Eu are studied in order to determine its usefulness as infrared dectectors. Dielectric constant and pyroelectric coefficient of the ceramics were determined. This material with perovskite structure presented a phase transition from tetragonal to cubic on the heating process, besides of presenting high values of dielectric constant. Values of figure of merit for infrared detection Rv=pi/εr were calculated. The results were compared with other materials used as infrared detectors.En este trabajo se estudian las características dieléctricas y piroeléctricas del sistema ferroléctrico cerámico de Pb0.88(Ln0.08Ti0.98 Mn0.02O3 (Ln = La, Sm, Eu para determinar su utilidad como detectores de infrarrojo. Se determinó la constante dieléctrica y el coeficiente piroeléctrico de las cerámicas. Este material con estructura de perovskita presentó una transición de fase tetragonal a cúbica en el proceso de calentamiento, además de presentar altos valores de la constante dieléctrica. Se obtuvieron valores de la figura de mérito para detección infrarroja Rv=pi/εr Los resultados se compararon con otros materiales usados como detectores de infrarrojo.

  17. Coherent potential approximation treatment of the Sm valence transition in SmS induced by alloying

    International Nuclear Information System (INIS)

    The Sm valence transition, similar to the pressure-induced transition in pure SmS, has been observed in a large number of cases by substituting a trivalent rare earth, B, for Sm, thereby forming isostructural alloys with a lattice constant smaller than that of semiconducting SmS. Such substitutions are expected to exert a 'chemical' pressure which simulates the external pressure. However, divalent substitutions (Yb, Eu and Ca), although having a favourable 'size' factor, do not induce any valence transition. Accordingly, band structure effects, essentially due to the relative position of the conduction bands of SmS and BS, should also be taken into consideration. In order to clarify the role which the lattice constant and the electronic structure play in the valence transition, these alloys have been studied using the coherent potential approximation (CPA) including both the crystal field effect and the Coulomb interaction between localised and itinerant states as driving mechanisms. For Sm, the 'homogeneous' picture is considered, each Sm site having the average valence; then the Smsub(1-x)Bsub(x)S system is reduced to a binary alloy. Charge transfer between the f states of Sm and the alloy conduction band (i.e. Sm valence change) is determined self-consistently. The calculations are consistent with the experimental behaviour and allow us to understand qualitatively the variation of the critical concentration xsub(c) for the transition as a function of the difference Δa between the lattice parameters of SmS and BS. (author)

  18. Report and recommendations of the Brilliant powerplant expansion project committee

    International Nuclear Information System (INIS)

    An application was submitted in December 2000 for a project approval certificate for the Brilliant Powerplant Expansion Project (BEP). It included the construction and operation of a new powerhouse with a generating capacity of close to 100 MW, a new intake and tailrace channels, as well as tailrace channel improvements, a powerhouse access bridge over the Kootenay River downstream from the Brilliant Dam, a 600 metre 230 kV transmission link and 230 kV switchyard (the switchyard is no longer part of the project), a construction site and excavation materials disposal areas, and access to the site from Highway 3A and also from Robson Road. Both before and during the environmental assessment review, comprehensive public consultation was undertaken. The issues that were examined were environmental effects, operations, socio-economic effects, health effects, and the cultural and heritage effects. It was concluded that the effects issues related to the construction of the project had been resolved, based on the information provided in the Application and on the mitigation and compensation measures. The potential impact on fish and fish habitat were examined under the operations heading. Again, the committee determined that the proponent had committed to target minimum flows and restrictions, and that the effects issues associated with the operations of the project had been resolved. Increased traffic through the community of Brilliant represented the main focus of the evaluation of the socio-economic effects. Positive economic and employment effects on local communities were expected, and the proponent was ready to address any potential negative social effects to the satisfaction of the committee. Groundwater resources were the only potentially significant effect identified under the heading health effects, and adequate compensation and mitigation measures were committed by the proponent to address the issue. The cultural and heritage effects identified archaeological

  19. First measurement of 153Sm in the SIR

    International Nuclear Information System (INIS)

    In June 1998, the NIST sent to the International Reference System (SIR) a solution of 153Sm standardized in a 4π ionization chamber. As this radionuclide had not previously been measured in the SIR, the resulting equivalent activity Ae,NIST is compared with the value calculated from the efficiency curve of the SIR. However, problems occurred owing to the presence of 154Eu and 156Eu impurities in the solution. The manner in which the final equivalent activity value for this solution of 153Sm has been deduced is described in this report. (authors)

  20. Adsorption of remazol brilliant blue on an orange peel adsorbent

    Directory of Open Access Journals (Sweden)

    M. R. Mafra

    2013-09-01

    Full Text Available A novel orange peel adsorbent developed from an agricultural waste material was characterised and utilised for the removal of Remazol Brilliant Blue from an artificial textile-dye effluent. The adsorption thermodynamics of this dye-adsorbent pair was studied in a series of equilibrium experiments. The time to reach equilibrium was 15 h for the concentration range of 30 mg L-1 to 250 mg L-1. The adsorption capacity decreased with increasing temperature, from 9.7 mg L-1 at 20 ºC to 5.0 mg L-1 at 60 ºC. Both the Langmuir and Freundlich isotherm models fitted the adsorption data quite reasonably. The thermodynamic analysis of dye adsorption onto the orange peel adsorbent indicated its endothermic and spontaneous nature. Thus, the application of orange peel adsorbent for the removal of dye from a synthetic textile effluent was successfully demonstrated.

  1. Anti-prion activity of Brilliant Blue G.

    Directory of Open Access Journals (Sweden)

    Yoshifumi Iwamaru

    Full Text Available BACKGROUND: Prion diseases are fatal neurodegenerative disorders with no effective therapy currently available. Accumulating evidence has implicated over-activation of P2X7 ionotropic purinergic receptor (P2X7R in the progression of neuronal loss in several neurodegenerative diseases. This has led to the speculation that simultaneous blockade of this receptor and prion replication can be an effective therapeutic strategy for prion diseases. We have focused on Brilliant Blue G (BBG, a well-known P2X7R antagonist, possessing a chemical structure expected to confer anti-prion activity and examined its inhibitory effect on the accumulation of pathogenic isoforms of prion protein (PrPres in a cellular and a mouse model of prion disease in order to determine its therapeutic potential. PRINCIPAL FINDINGS: BBG prevented PrPres accumulation in infected MG20 microglial and N2a neural cells at 50% inhibitory concentrations of 14.6 and 3.2 µM, respectively. Administration of BBG in vivo also reduced PrPres accumulation in the brains of mice with prion disease. However, it did not appear to alleviate the disease progression compared to the vehicle-treated controls, implying a complex role of P2X7R on the neuronal degeneration in prion diseases. SIGNIFICANCE: These results provide novel insights into the pathophysiology of prion diseases and have important implications for the treatment.

  2. Properties of the (Sm sub 0 sub . sub 3 sub 3 Eu sub 0 sub . sub 3 sub 3 Gd sub 0 sub . sub 3 sub 3)Ba sub 2 Cu sub 3 O sub y superconductor prepared by different processes in air

    CERN Document Server

    Giovannelli, F; Monot-Laffez, I

    2003-01-01

    Bars and pellets of the (Sm sub 0 sub . sub 3 sub 3 Eu sub 0 sub . sub 3 sub 3 Gd sub 0 sub . sub 3 sub 3)Ba sub 2 Cu sub 3 O sub x superconductor were processed in air, using the floating zone method and the top-seeded melt-textured growth method, respectively. The samples were prepared using different experimental conditions, i.e. maximal processing temperature, translation rate or cooling rate. Their physical properties and their microstructure were studied. All the samples exhibit a satisfying superconducting transition whereas the critical current density greatly depends on the processing parameters. The sample prepared by the floating zone method at 1070 deg C with a translation rate of 2 mm h sup - sup 1 exhibits a very high J sub c value of 70000 A cm sup - sup 2 in the self-field and more than 30000 A cm sup - sup 2 at 1.7 T. The pellet processed at 1080 deg C with a cooling rate of 2 deg C h sup - sup 1 has a high J sub c reaching about 56000 A cm sup - sup 2 in the self-field and more than 32000 A ...

  3. Facile synthesis, structural and spectroscopic properties of GdF{sub 3}:Ce{sup 3+}, Ln{sup 3+} (Ln{sup 3+}=Sm{sup 3+}, Eu{sup 3+}, Tb{sup 3+}, Dy{sup 3+}) nanocrystals with bright multicolor luminescence

    Energy Technology Data Exchange (ETDEWEB)

    Grzyb, Tomasz; Runowski, Marcin; Lis, Stefan, E-mail: blis@amu.edu.pl

    2014-10-15

    Hexagonal gadolinium fluorides doped with Ce{sup 3+} ions and co-doped with Sm{sup 3+}, Eu{sup 3+}, Tb{sup 3+} or Dy{sup 3+} were successfully synthesized via a simple co-precipitation approach, in the presence of glycerin as a capping agent. These fluorides, as solids or in aqueous solutions, showed intense, multicolored luminescence depending on the lanthanide ions used. The structures of the products were confirmed by powder X-ray diffraction (XRD). The morphologies of the synthesized nanophosphors were examined using transmission electron microscopy (TEM). The TEM results showed that the crystallites had shapes that varied with the dopant ion used. The spectroscopic properties: excitation spectra, emission spectra and luminescence decays were recorded and studied in detail. Bright luminescences from all of the products were triggered by effective energy transfer between the ions embedded in their structures. The mechanism for this phenomenon was also proposed. All of the synthesized products formed stable aqueous colloids, exhibiting brightly multicolored luminescence under UV light irradiation. - Highlights: • Hexagonal GdF{sub 3}:Ce{sup 3+}, Ln{sup 3+} nanocrystals were synthesized by a co-precipitation method. • Nanocrystals formed stable water colloids. • Multicolor luminescence under UV light was observed. • Energy transfer mechanism between Gd{sup 3+}, Ce{sup 3+} and Ln{sup 3+} ions was proposed.

  4. Uplatnění ekohydrologických principů při řízení zemědělsky využívaného povodí podle Rámcové vodní směrnice EU (2000/60/EU)

    Czech Academy of Sciences Publication Activity Database

    Hejzlar, Josef; Kopáček, Jiří; Dobiášová, B.; Žaloudík, Jiří

    2004-01-01

    Roč. 21, č. 3 (2004), s. 261-264. ISSN 1212-0731. [Agroregion 2004. České Budějovice, 06.09.2004-07.09.2004] R&D Projects: GA AV ČR(CZ) IBS6017004; GA AV ČR(CZ) IAA3017301 Grant ostatní: EU(XE) EUROHARP EVK1-CT-2001-00096 Keywords : restoration of aquatic ecosystems * nitrogen * phosphorus Subject RIV: DJ - Water Pollution ; Quality

  5. Optimal parameters for laccase-mediated destaining of Coomassie Brilliant Blue R-250-stained polyacrylamide gels

    OpenAIRE

    Yang, Jie; Yang, Xiaodan; Ye, Xiuyun; Lin, Juan

    2016-01-01

    The data presented in this article are related to the research article entitled “Destaining of Coomassie Brilliant Blue R-250-stained polyacrylamide gels with fungal laccase” [1]. Laccase is a class of multicopper oxidases that can catalyze oxidation of recalcitrant dyestuffs. This article describes optimal parameters for destaining of polyacrylamide gels, stained with Coomassie Brilliant Blue R-250, with laccase from basidiomycete Cerrena sp. strain HYB07. Effects of laccase activity, mediat...

  6. Immediate differentiation of salmonella-resembling colonies on brilliant green agar

    DEFF Research Database (Denmark)

    Jensen, Annette Nygaard; Hoorfar, Jeffrey

    2000-01-01

    A rapid biochemical system (OBIS) based on immediate enzymatic differentiation of Citrobacter, Proteus, Providencia, Hafnia and Morganella spp. from Salmonella on brilliant green agar was evaluated A total of 96 field isolates from various Salmonella serotypes, 18 Citrobacter freundii and 25...... isolates of other Enterobacteriaceae were tested All Salmonella isolates were identified correctly by the kit, and none of the Enterobacteriaceae isolates were identified as Salmonella. The results indicate complete specificity for Salmonella colonies on brilliant green agar....

  7. Draft Genome Sequences of Stenotrophomonas maltophilia Strains Sm32COP, Sm41DVV, Sm46PAILV, SmF3, SmF22, SmSOFb1, and SmCVFa1, Isolated from Different Manures in France.

    Science.gov (United States)

    Bodilis, Josselin; Youenou, Benjamin; Briolay, Jérome; Brothier, Elisabeth; Favre-Bonté, Sabine; Nazaret, Sylvie

    2016-01-01

    Stenotrophomonas maltophilia is a major opportunistic human pathogen responsible for nosocomial infections. Here, we report the draft genome sequences of Sm32COP, Sm41DVV, Sm46PAILV, SmF3, SmF22, SmSOFb1, and SmCVFa1, isolated from different manures in France, which provide insights into the genetic determinism of intrinsic or acquired antibiotic resistance in this species. PMID:27540065

  8. USE OF N, S-CODOPED NANO TITANIA AS PHOTOCATALYST FOR DEGRADATION OF BRILLIANT GREEN

    Directory of Open Access Journals (Sweden)

    Ankit Kumar Jain

    2015-03-01

    Full Text Available In the present work the effect of doping of N and S on TiO2 has been investigated using brilliant green as a model system. The rate of photocatalytic degradation of the dye was monitored spectrophotometrically. The effect of variation of different parameters like pH, concentration of brilliant green, amount of photocatalyst, dopant percentage and light intensity on the rate of photocatalytic degradation was also observed. On the basis of the observation, a tentative mechanism for the photocatalytic degradation of brilliant green has also been proposed. Environmental pollution in its various facets is a burning problem all over the world, out of which water pollution is a major problem. The present work contributes in the solution of waste water treatment by degrading organic pollutant in harmless products.

  9. Sm Transition Probabilities and Abundances

    OpenAIRE

    Lawler, J. E.; Hartog, E.A. den; Sneden, C.; Cowan, J. J.

    2005-01-01

    Radiative lifetimes, accurate to +/- 5%, have been measured for 212 odd-parity levels of Sm II using laser-induced fluorescence. The lifetimes are combined with branching fractions measured using Fourier-transform spectrometry to determine transition probabilities for more than 900 lines of Sm II. This work is the largest-scale laboratory study to date of Sm II transition probabilities using modern methods. This improved data set has been used to determine a new solar photospheric Sm abundanc...

  10. TUDOR LUPAŞCU – A BRILLIANT SCIENTIST AND SKILFULL MANAGER

    OpenAIRE

    Gheorghe Duca

    2010-01-01

    The Moldovan chemical community has recently honoured Professor Tudor LUPAŞCU on the occasion of his 60’s anniversary. Known as brilliant scientist and skilful manager, Professor LUPASCU is now the director of the Institute of Chemistry and one of the founders of the “Chemistry Journal of Moldova”, being the Managing Editor from the very beginning of its activity.

  11. 'Popular Science' names College of Engineering alumnus as one of Brilliant 10

    OpenAIRE

    Mackay, Steven D.

    2010-01-01

    Technology magazine 'Popular Science' has named two-time Virginia Tech College of Engineering alumnus Maurizio Porfiri to its 2010 Brilliant 10 List. Porfiri, now an assistant professor at Polytechnic Institute of New York University, earned both master's and doctoral degrees in engineering mechanics from Virginia Tech in 2000 and 2006, respectively.

  12. Preparation of Polyaniline/Filter-paper Composite for Removal of Coomassie Brilliant Blue

    DEFF Research Database (Denmark)

    Liu, Wanwan; Li, Xiaoqiang; Li, Mengjuan; Li, Yonggui; Ge, Mingqiao

    2015-01-01

    Polyaniline/filter-paper (PANI/FP) composite was prepared by in-situ polymerization of polyaniline onto filter-paper and subsequently evaluated for the removal of Coomassie brilliant blue (CBB) from aqueous solution. Scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and Fourier...

  13. Immediate differentiation of salmonella-resembling colonies on brilliant green agar

    DEFF Research Database (Denmark)

    Jensen, Annette Nygaard; Hoorfar, Jeffrey

    2000-01-01

    A rapid biochemical system (OBIS) based on immediate enzymatic differentiation of Citrobacter, Proteus, Providencia, Hafnia and Morganella spp. from Salmonella on brilliant green agar was evaluated A total of 96 field isolates from various Salmonella serotypes, 18 Citrobacter freundii and 25...

  14. Study of the Eu2+ and Eu3+ coexist in LiCl-KCl Eutectic Melt by Spectrophotometry and Electrochemistry Method

    International Nuclear Information System (INIS)

    In order to ensure the pyrochemical process, it is necessary to understand the chemical behavior of lanthanides in the molten salt. Through most of lanthanides in molten salts take trivalent states, Eu, Sm, and Yb are possible to take divalent states under reducing conditions, and Eu(II) is the most stable among them. Those reports suggest the existence of Eu in the chloride systems. In electrochemical analysis with molten salts, yttria stabilized zirconia membrane electrodes (YSZME) are largely used as an activity indicator of oxide anion, O2-. In the present study, the effect of the coexisted Eu2+ on the potentiometric titration of Eu3+ was examined. The spectrophotometry and electrochemistry method could b used to measure the ratio of [Eu2+]/[Eu3+]efficiently. The existence of the europium divalent in the LiCl-KCl-EuCl3 solution has been demonstrated by potentiometric titration method with YSZ electrode and Pt wire as a working electrode

  15. InterProScan Result: EU935628 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available EU935628 EU935628_1_ORF1 0890A7FF4EDDBB08 SMART SM00093 SERPIN 4.000003008698826E-9... T IPR000215 Protease inhibitor I4, serpin Molecular Function: serine-type endopeptidase inhibitor activity (GO:0004867) ...

  16. Sm Transition Probabilities and Abundances

    CERN Document Server

    Lawler, J E; Sneden, C; Cowan, J J

    2005-01-01

    Radiative lifetimes, accurate to +/- 5%, have been measured for 212 odd-parity levels of Sm II using laser-induced fluorescence. The lifetimes are combined with branching fractions measured using Fourier-transform spectrometry to determine transition probabilities for more than 900 lines of Sm II. This work is the largest-scale laboratory study to date of Sm II transition probabilities using modern methods. This improved data set has been used to determine a new solar photospheric Sm abundance, log epsilon = 1.00 +/- 0.03, from 26 lines. The spectra of three very metal-poor, neutron-capture-rich stars also have been analyzed, employing between 55 and 72 Sm II lines per star. The abundance ratios of Sm relative to other rare earth elements in these stars are in agreement, and are consistent with ratios expected from rapid neutron-capture nucleosynthesis (the r-process).

  17. SM18 Visits and Access

    CERN Multimedia

    2012-01-01

      VISITS The rules and conditions to be followed for visits in the SM18 Hall are laid out in the EDMS 1205328 document. No visit is allowed without prior reservation.   ACCESS Special access right is needed ONLY from 7 p.m. to 7 a.m. and during week-ends. From 1 December, the current SM18 access database will be closed and a new one “SM18-OWH outside normal hours” started from scratch. Requests, via EDH SM18-OWH, will have to be duly justified.   For further information, please contact Evelyne Delucinge.

  18. Optimal parameters for laccase-mediated destaining of Coomassie Brilliant Blue R-250-stained polyacrylamide gels.

    Science.gov (United States)

    Yang, Jie; Yang, Xiaodan; Ye, Xiuyun; Lin, Juan

    2016-06-01

    The data presented in this article are related to the research article entitled "Destaining of Coomassie Brilliant Blue R-250-stained polyacrylamide gels with fungal laccase" [1]. Laccase is a class of multicopper oxidases that can catalyze oxidation of recalcitrant dyestuffs. This article describes optimal parameters for destaining of polyacrylamide gels, stained with Coomassie Brilliant Blue R-250, with laccase from basidiomycete Cerrena sp. strain HYB07. Effects of laccase activity, mediator type and concentration, temperature and time on destaining of polyacrylamide gels were evaluated with respect to gel background intensity and protein band signals, and the optimal destaining effects were obtained with 15 U mL(-1) laccase and 2 μM ABTS at 37 °C after 2 h. PMID:26955647

  19. Physics studies with brilliant narrow-width -beams at the new ELI-NP Facility

    Indian Academy of Sciences (India)

    Dimiter L Balabanski; ELI-NP Science Team

    2014-11-01

    The Extreme Light Infrastructure Nuclear Physics (ELI-NP) Facility in Magurele is a European research centre for ultrahigh intensity lasers, laser–matter interaction, nuclear science and material science using laser-driven radiation beams. It is the first project within the European Strategic Forum for Research Infrastructure (ESFRI) agenda financed by the European Regional Development Fund. The nuclear physics research programme of the facility is focussed on studies with brilliant narrow-width -beams and experiments in extreme laser fields.

  20. TUDOR LUPAŞCU – A BRILLIANT SCIENTIST AND SKILFULL MANAGER

    Directory of Open Access Journals (Sweden)

    Gheorghe Duca

    2010-06-01

    Full Text Available The Moldovan chemical community has recently honoured Professor Tudor LUPAŞCU on the occasion of his 60’s anniversary. Known as brilliant scientist and skilful manager, Professor LUPASCU is now the director of the Institute of Chemistry and one of the founders of the “Chemistry Journal of Moldova”, being the Managing Editor from the very beginning of its activity.

  1. Brilliant blue G-assisted peeling of the internal limiting membrane in macular hole surgery

    OpenAIRE

    Naithani Prashant; Vashisht Naginder; Khanduja Sumeet; Sinha Subijay; Garg Satpal

    2011-01-01

    Dye-assisted internal limiting membrane (ILM) peeling and gas tamponade is the surgery of choice for idiopathic macular holes. Indocyanine green and trypan blue have been extensively used to stain the ILM. However, the retinal toxicity of indocyanine green and non-uniform staining with trypan blue has necessitated development of newer vital dyes. Brilliant blue G has recently been introduced as one such dye with adequate ILM staining and no reported retinal toxicity. We performed a 23-gauge p...

  2. EU enlargement and immigration

    OpenAIRE

    Kraus, Margit; Schwager, Robert

    2000-01-01

    This paper assesses the consequences of EU enlargement for East West migration. In the theoretical part, we identify several factors in addition to the reduction of moving costs by which EU membership influences migration. Specifically, EU accession affects income gaps. Moreover, if EU membership is refused, fear of future restrictions on immigration will lead to increased current migration. Additionally, casual evidence from the 1980s EU South enlargement is examined. Since then no increases...

  3. National funding initiatives for laser technology in Germany: projects on brilliant laser sources and their applications

    Science.gov (United States)

    Bachmann, Friedrich

    2011-02-01

    Germany's leading role in laser technology is not least a consequence of successful national precompetitive joint development projects between industry and science: Funding of laser technology in Germany is strongly performed by the German Federal Ministry of Education and Research (BMBF) and has already been started in the second half of the eighties of last century. Since then several programs matched to the actual technological status and the future requirements of the market have been run: whilst activities have been focused on gas lasers in the beginning, today - in the actual research funding program "optical technologies" - semiconductor lasers and diode pumped lasers are in the center of interest. More than ever before relevance of the development to applications must be integrated into the projects. Consequently, in most projects lasers source development and application of novel brilliant laser sources are combined. This has been successfully performed in the BRIOLAS (Brilliant Diode Lasers) initiative, which has been launched in 2004 and will come to an end in 2010. Based on the knowledge and experience gained in the 13 projects of the BRIOLAS initiative, two new initiatives have been launched in 2008, namely INLAS (Integrated Optical Components for High Power Laser Beam Sources) and MABRILAS (Material Processing with Brilliant Laser Beam Sources).

  4. Brilliant Green Dye Elimination from Water Using Psidium guajava Leaves and Solanum tuberosum Peels as Adsorbents in Environmentally Benign Way

    OpenAIRE

    2015-01-01

    The aim of this study is to check the feasibility of Psidium guajava (Guava) leaves and peels of Solanum tuberosum (Potato) as biosorbents in removal of Brilliant Green (BG) in batch mode. Surface analysis of biosorbents was done by FT-IR and quantitatively analyzed by Boehm titration. The removal of dye was confirmed by UV-VIS spectroscopy. Isothermal modeling was studied by using Langmuir, Freundlich, and Temkin isotherms. Various isothermal parameters for adsorption of Brilliant Green such...

  5. Measurement of fission neutron spectrum averaged cross sections of some threshold reactions on europium: small scale production of no-carrier-added 153Sm in a nuclear reactor

    International Nuclear Information System (INIS)

    Employing the activation technique in combination with radiochemical separations and high-resolution γ-ray spectroscopy fission neutron spectrum averaged cross sections were measured for several (n, 2n), (n, p) and (n, α) reactions on isotopes of europium. Our measurements constitute the first systematic studies. Of special interest was the investigation of 153Eu(n, p)153Sm reaction for the production of no-carrier-added 153Sm in a nuclear reactor. Using 100% enriched 153Eu target, 97.21 MBq 153Sm per batch can be produced which is, however, not sufficient for medical application. (orig.)

  6. Creating EU law judges

    DEFF Research Database (Denmark)

    Mayoral Diaz-Asensio, Juan Antonio; Jaremba, Urszula; Nowak, Tobias

    2014-01-01

    The judicial protection system in the European Union (EU) is premised on the fact that national judges are supposed to act as decentralized EU judges. This role is exercised through tools enshrined in, inter alia, primacy, direct and indirect effect of EU law, and the preliminary ruling procedure....... However, a number of studies show that national judges experience difficulties in exercising EU competences due to their lack of knowledge in the field of EU law. In this contribution we study the differences in the level of self-evaluation of EU law knowledge among judges, which consequently influence...... the way judges approach EU law. For that purpose we question the relevance of several institutional and socio-legal factors, such as organization of the judiciary, generation, the system of legal education and judicial training and practical experience with EU law. Our analysis is based on data...

  7. Neutron Irradiation Effects on Optical Properties of Sm-Doped Lead Borate Glasses

    International Nuclear Information System (INIS)

    Sm+3 doped lead borate glass (B2O3 -PbO-Al2O3) samples were prepared with different concentrations of Sm+3 using the normal melt quench technique. The prepared glass samples were irradiated using (5 Ci) 241AmBe neutron source with neutron flux of 4.1 E 7 n/cm2.sec. A study of the effect of both Sm2O3 content and neutron irradiation doses on some optical properties of Sm2O3doped lead borate glasses ( B2O3-PbO- Al2O3) have been performed. Optical parameters such as: the absorption coefficient (α), Urbach’s energy (Eu). Fermi energy (Ef), direct and indirect optical energy gap (Eogd and Eogind) has been evaluated.

  8. EU Bananarama III

    OpenAIRE

    Borrell, Brent

    1994-01-01

    On July 1, 1993 the European Union (EU) adopted a unified banana policy that is even more distortionary and costly than some of the disparate national policies it replaced. Before, some EU countries gave preferred market access and high prices to banana producers from selected developing countries in Africa, the Caribbean, and the Pacific, and from EU territorial suppliers. This preferential status was regarded as a form of aid to countries with historical ties to certain EU countries (France...

  9. Why the Four SM Families

    CERN Document Server

    Sultansoy, S F

    2001-01-01

    The flavor democracy favors the existence of the nearly degenerate fourth SM family, whereas the fifth SM family is disfavored both by the mass phenomenology and precision tests of the Standard Model. The multi-hundreds GeV fourth family quarks will be copiously produced at the LHC. However, the first indication of the fourth family may come from the Higgs search at the upgraded Tevatron.

  10. Gamma-rays in the 146Eu→146Sm decay

    International Nuclear Information System (INIS)

    Gamma-rays of 146Eu→146Sm decay were measured on the anti Compton spectrometer. 293 γ-transitions were attributed to 146Eu decay, 134 of them having been observed for the first time. For other transitions the accuracy of determination of Iγ, Eγ was improved several fold. Conversion electron spectra were measured with Si(Li) detector. IK were determined for 105 transitions, for four of them - for the first time. Relative intensities of differential-integral coincidences were measured for 130 transitions. 20 refs.; 2 tabs

  11. EU Budgetary Dynamics

    DEFF Research Database (Denmark)

    Citi, Manuele

    2013-01-01

    change in the EU in light of the two models of policy dynamics currently existing in the literature: the incrementalist model and the punctuated equilibrium model. The analysis of long series of original data extracted from the EU budget shows that EU policies do not evolve following an incrementalist...... pattern, but by a punctuated equilibrium dynamic....

  12. Enhanced decolorization of Solar brilliant red 80 textile dye by an indigenous white rot fungus Schizophyllum commune IBL-06.

    Science.gov (United States)

    Asgher, Muhammad; Yasmeen, Qamar; Iqbal, Hafiz Muhammad Nasir

    2013-10-01

    An indigenously isolated white rot fungus, Schizophyllum commune IBL-06 was used to decolorize Solar brilliant red 80 direct dye in Kirk's basal salts medium. In initial screening study, the maximum decolorization (84.8%) of Solar brilliant red 80 was achieved in 7 days shaking incubation period at pH 4.5 and 30 °C. Different physical and nutritional factors including pH, temperature and fungal inoculum density were statistically optimized through Completely Randomized Design (CRD), to enhance the efficiency of S. commune IBL-06 for maximum decolorization of Solar brilliant red 80 dye. The effects of inexpensive carbon and nitrogen sources were also investigated. Percent dye decolorization was determined by a reduction in optical density at the wavelength of maximum absorbance (λ max, 590 nm). Under optimum conditions, the S. commune IBL-06 completely decolorized (100%) the Solar brilliant red 80 dye using maltose and ammonium sulfate as inexpensive carbon and nitrogen sources, respectively in 3 days. S. commune IBL-06 produced the three major ligninolytic enzymes lignin peroxidase (LiP), manganase peroxidase (MnP) and lacaase (Lac) during the decolorization of Solar brilliant red 80. LiP was the major enzyme (944 U/mL) secreted by S. commune IBL-06 along with comparatively lower activities of MnP and Laccase. PMID:24235871

  13. Retinal Biocompatibility of Brilliant Blue G with Deuterated Water for Chromovitrectomy

    Directory of Open Access Journals (Sweden)

    Emmerson Badaró

    2014-01-01

    Full Text Available Purpose: To investigate the retinal biocompatibility of Brilliant Blue G with deuterated water (BBG-D2O as a vital dye for chromovitrectomy. Methods: In this animal study, 0.05 mL of 0.25 g/L Brilliant Blue G (BBG associated with 0.13 mL/mL of deuterium oxide (D2O was injected intravitreally in the right eye and the same amount of balanced salt solution (BSS was injected similarly in the left eye of rabbits. Clinical examination and histology with light microscopy were performed after seven days. Retinal cell layers were evaluated for morphologic alterations. Electroretinographic (ERG changes were also assessed at baseline and 7 days after the injections. Results: A total of 6 rabbits were included in the study. The gross histopathologic appearance of the retina, choroid, sclera and optic nerve was within normal limits without any sign of severe retinal necrosis or cystic degeneration. Light microscopy showed that BBG-D2O caused no substantial alterations in retinal layers as compared to control eyes. The injection of BBG-D2O did not induce considerable functional ERG alterations. Conclusion: Intravitreal injection of BBG-D2O 0.25 g/L seems to induce no retinal toxicity as documented by lack of functional and histological changes.

  14. Bioflocculant production by Haloplanus vescus and its application in acid brilliant scarlet yellow/red removal.

    Science.gov (United States)

    Zhong, Chun-Ying; Chen, Hong-Gao; Cao, Gang; Wang, Jun; Zhou, Jian-Gang

    2016-01-01

    A novel bioflocculant MBF057 produced by a salt-tolerant Haloplanus vescus HW0579 was investigated in this study. The effects of culture conditions such as initial pH, inoculum size, and chemical oxygen demand (COD) of K-acid wastewater on MBF0579 production were studied. The result showed that 8.09 g/L purified MBF0579 was extracted with the following optimized conditions: 780 mg/L COD of K-acid wastewater as carbon source, inoculum size 12.5%, and initial pH 7.0. The biopolymer contained 78.6% polysaccharides and 21.1% proteins. The highest flocculating rate of 81.86 and 95.07% for the COD and chroma of acid brilliant scarlet gelb rot (yellow/red, GR) dye wastewater were achieved at a dosage of 150 mg/L, pH 2.0 and contact time 100 min. Overall, these findings indicate bioflocculation offers an effective alternative method of decreasing acid brilliant scarlet GR during dye wastewater treatment. PMID:26901711

  15. Brilliant Green Dye Elimination from Water Using Psidium guajava Leaves and Solanum tuberosum Peels as Adsorbents in Environmentally Benign Way

    Directory of Open Access Journals (Sweden)

    Rabia Rehman

    2015-01-01

    Full Text Available The aim of this study is to check the feasibility of Psidium guajava (Guava leaves and peels of Solanum tuberosum (Potato as biosorbents in removal of Brilliant Green (BG in batch mode. Surface analysis of biosorbents was done by FT-IR and quantitatively analyzed by Boehm titration. The removal of dye was confirmed by UV-VIS spectroscopy. Isothermal modeling was studied by using Langmuir, Freundlich, and Temkin isotherms. Various isothermal parameters for adsorption of Brilliant Green such as qm=1.075 mg/g, 1.173 mg/g ΔG°=-3.397, and −2.397 KJ/mol were noted for Solanum tuberosum peels (PP and Psidium guajava leaves (GL, respectively. Similarly pH, moisture content, and various metals were quantitatively analyzed. Results showed that leaves of Psidium guajava were more effective for removal of Brilliant Green.

  16. Phase equilibria in Sm-Ga-S ternary system according to SmGa2-GaS, SmGa2-SmS, Sm3S4-Ga2S3, SmS-GaS, Sm-GaS cross sections

    International Nuclear Information System (INIS)

    Phase equilibria in ternary system Sm-Ga-S over cross sections SmGa2-GaS, SmGa2-SmS, SmS-GaS, Sm3S4-Ga2S3, Sm-GaS have been studied for the first time using the methods of physicochemical analysis, their T-x projections were plotted. The cross sections SmGa2-GaS, SmGa2-SmS, Sm3S4-Ga2S3 and SmS-GaS are quasibinary, while Sm-GaS is nonquasibinary one. Formation of two ternary compounds of the composition Sm4GaS5 and Sm5Ga2S5 was ascertained by peritectic reactions

  17. Enhanced decolorization of Solar brilliant red 80 textile dye by an indigenous white rot fungus Schizophyllum commune IBL-06

    OpenAIRE

    Asgher, Muhammad; Yasmeen, Qamar; Iqbal, Hafiz Muhammad Nasir

    2013-01-01

    An indigenously isolated white rot fungus, Schizophyllum commune IBL-06 was used to decolorize Solar brilliant red 80 direct dye in Kirk’s basal salts medium. In initial screening study, the maximum decolorization (84.8%) of Solar brilliant red 80 was achieved in 7 days shaking incubation period at pH 4.5 and 30 °C. Different physical and nutritional factors including pH, temperature and fungal inoculum density were statistically optimized through Completely Randomized Design (CRD), to enhanc...

  18. High-Precision Measurement of Eu/Eu* in Geological Glasses via LA-ICP-MS Analysis

    Science.gov (United States)

    Tang, Ming; McDonough, William F.; Arevalo, Ricardo, Jr.

    2014-01-01

    Elemental fractionation during laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis has been historically documented between refractory and volatile elements. In this work, however, we observed fractionation between light rare earth elements (LREEs) and heavy rare earth elements (HREEs) when using ablation strategies involving large spot sizes (greater than 100 millimeters) and line scanning mode. In addition: (1) ion yields decrease when using spot sizes above 100 millimeters; (2) (Eu/Eu*)(sub raw) (i.e. Europium anomaly) positively correlates with carrier gas (He) flow rate, which provides control over the particle size distribution of the aerosol reaching the ICP; (3) (Eu/Eu*)(sub raw) shows a positive correlation with spot size, and (4) the changes in REE signal intensity, induced by the He flow rate change, roughly correlate with REE condensation temperatures. The REE fractionation is likely driven by the slight but significant difference in their condensation temperatures. Large particles may not be completely dissociated in the ICP and result in preferential evaporation of the less refractory LREEs and thus non-stoichiometric particle-ion conversion. This mechanism may also be responsible for Sm-Eu-Gd fractionation as Eu is less refractory than Sm and Gd. The extent of fractionation depends upon the particle size distribution of the aerosol, which in turn is influenced by the laser parameters and matrix. Ablation pits and lines defined by low aspect ratios produce a higher proportion of large particles than high aspect ratio ablation, as confirmed by measurements of particle size distribution in the laser induced aerosol. Therefore, low aspect ratio ablation introduces particles that cannot be decomposed and/or atomized by the ICP and thus results in exacerbated elemental fractionation. Accurate quantification of REE concentrations and Eu/Eu* requires reduction of large particle production during laser ablation. For the reference

  19. EU Security Strategy

    Institute of Scientific and Technical Information of China (English)

    Hong Jianjun

    2007-01-01

    The European Security and Defence Policy (ESDP) comprises an important part of the EU's Common Foreign and Security Policy (CFSP). The aim of ESDP is to strengthen the EU's external ability to act through the development of civilian and military capabilities for international conflict prevention and crisis management. In December 2003, the EU adopted its first European Security Strategy (ESS). Ever since then, the implementation of the ESS has been regarded as one of the biggest challenges for the EU in CFSP/ESDP matters. Although much progress has been made in its independent security and defence-building process, EU still faces serious problems and difficulties in this policy area. This paper tries to examine these recent developments, assess their impacts in regional-global security, and analyze existing problems and future trends. Finally, the author also examines EU-China engagements in recent years and explores possibilities for their future cooperation in the area of international security.

  20. Amyloid fibrillogenesis of lysozyme is suppressed by a food additive brilliant blue FCF.

    Science.gov (United States)

    Chen, Yu-Han; Tseng, Chia-Ping; How, Su-Chun; Lo, Chun-Hsien; Chou, Wei-Lung; Wang, Steven S-S

    2016-06-01

    At least 30 different human proteins can fold abnormally to form the amyloid deposits that are associated with a number of degenerative diseases. The research presented here aimed at understanding the inhibitory potency of a food additive, brilliant blue FCF (BBF), on the amyloid fibril formation of lysozyme. Our results demonstrated that BBF was able to suppress the formation of lysozyme fibrils in a dose-dependent fashion. In addition, the structural features and conformational changes in the lysozyme samples upon the addition of BBF were further characterized using circular dichroism spectroscopy, nile red fluorescence spectroscopy, turbidity assay, and sodium dodecyl sulfate electrophoresis. Through molecular docking and molecular dynamics simulations, BBF's mechanism of action in lysozyme fibrillogenesis inhibition was found to be initiated by binding with the aggregation-prone region of the lysozyme. We believe the results from this research may contribute to the development of effective therapeutics for amyloidoses. PMID:26970823

  1. Utilization of cocoa pod husk waste as potential adsorbents for Remazol Brilliant Violet 5R removal

    International Nuclear Information System (INIS)

    Removal of Remazol Brilliant Violet 5R (RBV5R) dye from aqueous solution by adsorption onto activated carbon produced from cocoa pod husk (CPH) waste was investigated. Adsorption isotherms were derived at 30 degree Celsius on the basis of batch analysis. Isotherm data were treated according to Langmuir and Freundlich models. Kinetics of adsorption was followed by in situ UV-spectroscopy and the data were treated according to pseudo-first-order and pseudo-second-order models. The fits of experimental data to these equations were examined. It was found that the adsorption process by RVB5R dye onto activated carbon (AC) follows the Freundlich and pseudo-first-order model. (author)

  2. Photodynamic action of LED-light on standard and clinical strains of Staphylococci processed by Brilliant Green and Titanium Dioxide

    Science.gov (United States)

    Tuchina, Elena S.; Tuchin, Valery V.

    2011-03-01

    We assume that the effectiveness of phototherapy against microorganisms may be increased if together with the photosensitizer a photocatalyst will be used. It was found that the combination of TiO2-nanoparticles and Brilliant Green at two-wavelength irradiation with blue (405 nm) and red (625 nm) light provides a strong antimicrobial effect on standard and clinical strains of Staphylococci.

  3. Proton capture cross sections on neutron-magic 144Sm at astrophysically relevant energies

    Science.gov (United States)

    Kinoshita, N.; Hayashi, K.; Ueno, S.; Yatsu, Y.; Yokoyama, A.; Takahashi, N.

    2016-02-01

    Background: The p nuclei, which are not produced by neutron capture processes, are present with a typical isotopic abundance of 0.01%-0.3%. Abundance decreases with an increase in atomic number. However, the neutron-magic isotopes of 92Mo and 144Sm exhibit unusually large abundances in comparison. A combination of proton and α -particle capture reactions and neutron emission reactions are key to understanding this issue. Currently, complex network calculations do not have access to much experimental data, and hence require theoretically predicted reaction rates in order to estimate final abundances produced in nucleosynthesis. Purpose: Few experimental cross sections of (p ,γ) reactions on heavy nuclides with mass numbers of 130-150 have been reported. The 144Sm(p ,γ )145Eu reaction is the main destruction pathway for the nucleosynthesis of the 144Sm nuclide. In the present paper, experimental cross sections of the 144Sm(p ,γ )145Eu reaction at a range including astrophysically relevant energies for the p process were determined to compare with theoretical predictions using the Hauser-Feshback statistical model. Methods: The 144Sm was deposited on a high-purity Al foil with the molecular plating method. Stacks consisting of Ta degrader foils, 144Sm targets, and Cu foils used as flux monitors were irradiated with 14.0-MeV proton beams. The 144Sm(p ,γ )145Eu cross sections were determined from the 145Eu activities and the proton fluence estimated from the 65Zn activity in the Cu monitor foil. The proton energies bombarded on each 144Sm target were estimated using srim2013. Results: We determined the 144Sm(p ,γ )145Eu cross sections at proton energies between 2.8 and 7.6 MeV. These energies encompass nucleosynthesis temperatures between 3 and 5 GK. The cross sections at energies higher than 3.8 MeV agreed well with theoretically predicted cross sections using talys using the generalized superfluid (GS) model for level densities. However, calculations using non

  4. Luminescence properties of phosphate phosphor Ba3Y(PO4)3:Sm3+

    International Nuclear Information System (INIS)

    A series of reddish orange-emitting phosphate phosphors Ba3Y1−x(PO4)3:xSm3+(0.01≤x≤0.20) were synthesized by solid-state reaction. X-ray diffraction and photoluminescence spectra were utilized to characterize the structure and luminescence properties of as-synthesized phosphors. The optimized phosphors Ba3Y0.95(PO4)3:0.05Sm3+ present several excitation bands from 300 to 500 nm, and exhibit intense reddish orange-emitting properties. The energy transfer type between Sm3+ ions was confirmed as d–d interaction by using Van Uitert model. The chromatic properties of the typical sample Ba3Y(PO4)3:0.05Sm3+ phosphor have been found to have chromaticity coordinates of (0.583, 0.405), which are located in reddish orange region under the excitation of 401 nm. These results indicated that Ba3Y(PO4)3:Sm3+ phosphors have potential applications in the field of lighting and display due to their effective excitation in the near-ultraviolet range. - Graphical abstract: The color coordinates for 5 mol% Sm3+ doped Ba3Y(PO4)3 phosphor were calculated to be (0.583, 0.405), which are located in reddish orange region under the excitation of 401 nm. The peaks of Ba3Y0.95(PO4)3:0.05Sm3+ phosphor with the highest emission intensity at 600 nm are broader than those of Y2O3:Eu3+ and Y2O2S:Eu3+ phosphors. All these characteristics suggest that Ba3Y(PO4)3:Sm3+ phosphors are suitable for near-UV (370–410 nm) excitation and can be applicable to near UV-based WLEDs. ▪ - Highlights: • Different concentration Sm3+-doped Ba3Y(PO4)3 phosphors were fabricated by solid state method. • The optimized phosphors present the several excitation bands from 300 to 500 nm. • The Ba3Y(PO4)3:Sm3+ shows bright reddish orange emissions under 401 nm excitation

  5. EU's lille sikkerhedsnet

    DEFF Research Database (Denmark)

    Rangvid, Jesper

    2014-01-01

    I forrige uge indgik EU-kommissionen og EU-Parlamentet en aftale om en fælles afviklingsmekanisme i bank-unionen (Single Resolution Mechanism; SRM). ... Så på trods af mere kapital, nye bail-in regler og afviklingsfonden tror jeg ikke, at det kan udelukkes, at fremtidige "bankredninger" kan nødve...

  6. Excited states in 146Sm and 147Sm

    International Nuclear Information System (INIS)

    The sup(144,146)Nd(α,xn) and sup(146,148)Nd(3He,xn) reactions with Esub(α) = 20 - 43 MeV and E3sub(He) = 19 - 27 MeV are used to investigate excited states in the isotopes 146Sm and 147Sm. The experiments involve measurements of singles γ-ray spectra and conversion electron spectra, γ-ray angular distributions and three parameter (E sub(γ)E sub(γ) time) coincidences. From these experiments information is obtained for states with spin up to I = 13+ and I = 27/2-, respectively, These states are interpeted within the framework of the cluster-vibration model (CVM) as well as the shell model. (author)

  7. Determination of half-life of the 155Sm β-decay

    International Nuclear Information System (INIS)

    Full text: The half-lives of some nuclides are of high importance, especially for calculations regarding the nuclear fallout in nuclear accidents. Rare-earth elements, like Eu and Ce, in the form of oxides dissolved in irradiated nuclear fuel are non-volatile and released with difficulty during an accident, making their isotopes important in the investigation of radioecological studies. There are many codes to calculate these radioisotopes activities in nuclear reactors, but to make these inventories, all the feeding chain must be known. Particularly, 155Eu is formed by direct fission process, neutron capture of 154Eu and beta decay of 155Sm. The last process have a short half life and the correct value is an important information for the activity calculation. In this work, the half-life of the 155Sm β decay was determined using enriched 154Sm samples submitted to irradiation in the IEA-R1 reactor of IPEN; the activity of the samples were followed for 4-5 consecutive half lives using a 198cm3 HPGe detector. The data was corrected using a non paralizable dead time correction and fitted to an exponential decay function using a non linear fitting procedure developed on the MatLab platform. The resulting value was compatible to the one found in the literature, with a lower uncertainty. (author)

  8. Redovisningens användare och änvändning : Externredovisning ur ett småföretagsperspektiv

    OpenAIRE

    Petersson, Eva; Söderberg, Malin; Kviberg, Rebecca

    2007-01-01

    Ofta fokuseras det på större företag i undervisningen, men verkligheten är den att de flesta företag i Sverige är små eller medelstora. Det finns olika definitioner av vad ett småföretag är, men ingen är mer rätt än någon annan och i denna uppsats kommer EU:s definition att användas. Alla företag, stora som små, har någon/några som vill ta del av företagets ekonomiska information. De små företagen har oftast inte lika många intressenter som de stora företagen, och därför är det sannolikt att ...

  9. EU Industrial Policy

    DEFF Research Database (Denmark)

    Pellegrin, Julie; Giorgetti, Maria Letizia; Jensen, Camilla;

    Following disregard in the 1980s, industrial policy has recently attracted policy attention at EU level. The objective of this study provided by Policy Department A at the request of the ITRE Committee, is to establish the state of the art of a coordinated and integrated EU industrial policy. It...... assesses current initiatives, policies and arrangements and proposes an overview of stakeholders' positions at EU and national levels in order to feed into the debate on how to improve competitiveness and growth in Europe....

  10. Essentials of EU law

    CERN Document Server

    Reinisch, August

    2012-01-01

    This book explores the history and institutions of the EU, examines the interplay of its main bodies in its legislative process and illustrates the role played by the EU Courts and the importance of fundamental rights. The student is also introduced to the key principles of the internal market, in particular the free movement of goods and the free movement of workers. In addition a number of other EU policies, such as the Common Agricultural Policy, Environmental Protection and Social Policy are outlined, while a more detailed inquiry is made into European competition law.

  11. Governing EU employment policy

    DEFF Research Database (Denmark)

    Sørensen, Eva; Triantafillou, Peter; Damgaard, Bodil

    2015-01-01

    In the European Union (EU), employment policy is a prerogative of the member states. Therefore the EU's ability to govern in this area depends on its capability to involve national governments and relevant stakeholders in a collaborative effort to formulate and implement shared policy objectives....... Drawing an analytical distinction between cooperation, coordination and collaboration, the article analyses the formulation and implementation of EU employment policies. It concludes that while the formulation of policy objectives and the discussion of national policy approaches do involve elements of...

  12. EU Food Health Law

    DEFF Research Database (Denmark)

    Edinger, Wieke Willemijn Huizing

    This thesis shows that the distinction between food safety and non-safety issues in Regulation (EC) No 178/2002, the General Food Law (GFL), results in a grey area of regulation. This grey area comprises foods that do not pose a food safety risk in a legal sense, but that could pose a threat to...... adoption of harmonising measures that could facilitate a better consumer protection from non-safety health risks at the EU level. The EU legislature should use this legislative competence to fill in the regulatory grey area. Two possible ways forward to better integrate food health into the EU food law...

  13. EU-retten 1

    DEFF Research Database (Denmark)

    Sørensen, Karsten Engsig; Nielsen, Poul Runge

    Udover en introduktion til EU-retten, herunder dens institutioner og retskilderne, indeholder bogen en grundig analyse af EF-traktatens regler om fri bevægelighed for varer, personer, tjenesteydelser og kapital....

  14. EU Labour Law

    DEFF Research Database (Denmark)

    Nielsen, Ruth

    The focus in this book is upon EU labour law and its interaction with national and international labour law. The book provides an analysis of the framework and sources of European labour law. It covers a number of substantive topics, notably collective labour law, individual employment contracts......, discrimination on grounds of sex and on other grounds, free movement of persons, restructuring of enterprises, working environment and enforcement of rights derived from EU labour law....

  15. EU Power Balance

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    @@ Intense clashes of interests and collusion of ideas sprang up incessantly among nations over upward sovereignty transfer, interests distribution and maintenance of parity among partners in the course of economic integration. Disparities in size, territory, national strength and development level conceivably often led to tensions and even crises over power distribution. So EU history can be described as one of crises or crisis settlement through reaching a new equilibrium, a significant process for sustained EU stability.

  16. Convergence in the EU

    OpenAIRE

    Bongardt, Annette; Torres, Francisco; WUNSCH, Pierre; Hefeker, Carsten; Hermann, Christoph

    2013-01-01

    The EU has long viewed economic and institutional convergence as important goals, but the results thus far have been decidedly mixed, and there remain several open questions: How exactly should convergence be defined? How much convergence is necessary? What steps can be taken to improve convergence in the EU, and how can success be defined? Finally, how much convergence can be achieved by improving the economic performance in underperforming regions, and how can convergence in the form of har...

  17. EU Agro Biogas Project

    OpenAIRE

    Amon, T.; Mayr, H.; M. Eder; Hobbs, P.; Rao Ravella, S.; Roth, U.; Niebaum, A.; Doehler, H.; Weiland, P.; Abdoun, E.; A. Moser; Lyson, M.; Heiermann, M.; Plöchl, M.; Budde, J.

    2009-01-01

    EU-AGRO-BIOGAS is a European Biogas initiative to improve the yield of agricultural biogas plants in Europe, to optimise biogas technology and processes and to improve the efficiency in all parts of the production chain from feedstock to biogas utilisation. Leading European research institutions and universities are cooperating with key industry partners in order to work towards sustainable biogas production in Europe. Fourteen partners from eight European countries are involved in the EU-AGR...

  18. Adsorption of Methyl Violet and Brilliant Blue onto Poly(vinyl alcohol) Membranes Grafted with N-Vinyl imidazol / Acrylic Acid

    International Nuclear Information System (INIS)

    Poly(vinyl alcohol) films were grafted with two monomers using gamma radiation, acrylic acid and N-vinyl imidazole. The ability of these membranes for the adsorption of methyl violet and brilliant blue has been investigated. The data show that untreated or alkali treated membranes adsorb methyl violet; but they did not absorb brilliant blue. In contrast, acidic treated membranes do adsorb brilliant blue, and did not adsorb methyl violet. This indicates that these membranes could be used for the separation of both dyes. Also it was found that the dye uptake increases with increasing the degree of grafting

  19. Suppression of brilliant green bromoindate solvent extraction in the presence of foreign metals

    International Nuclear Information System (INIS)

    Extraction of indium from H2SO4 and KBr solution in the form of bromoindate brilliant green diminishes in the presence of relatively large amounts of such metals being extracted as Fe(3), Tl(3), Zn, Hg(2) and Cd. Gallium has no effect on the extraction of indium. With the use of radioactive isotope sup114m in the influence of the medium acidity, of the concentration of metals and of the nature of organic solvent on the extent of indium extraction inhibition in the presence of macroelements has been studied. The character and extent of inhibition of indium extraction depend on the nature of the macroelement: the better the macroelement can be extracted in the form of an ion association, the stronger it inhibits the extraction of indium. Inhibition of the extraction is explained by dissociation of the ion associations extracted in the organic phase and, as a consequence of this dissociation, by the action of the common ion, vix., the dye cation

  20. Downsizing of Johansson spectrometer for X-ray fluorescence trace analysis with brilliant undulator source

    International Nuclear Information System (INIS)

    The downsizing of a Johansson-type X-ray fluorescence (XRF) spectrometer has been examined as a way of enhancing detection efficiency with a tolerable loss of energy resolution. A compact spectrometer equipped with a Ge(2 2 0) analyzing crystal with a Rowland radius of 120 mm has been tested with a highly brilliant helical undulator source at BL40XU, SPring-8. The energy resolution obtained for cobalt Kα1 (6930.32 eV) was 8.8 eV, which is 10-20 times better than that obtained using a Si(Li) detector, and effectively improved the signal-to-background ratio for XRF spectra. The combination of the present spectrometer and a third generation synchrotron source could provide new opportunities for trace analytical applications, which have been difficult so far by conventional synchrotron XRF experiments based on a Si(Li) detector system. The detection limit obtained for solid bulk samples has reached a level of several tens of ppb

  1. High resolution laser micro sintering / melting using q-switched and high brilliant laser radiation

    Science.gov (United States)

    Exner, H.; Streek, A.

    2015-03-01

    Since the discovery of selective laser sintering/melting, numerous modifications have been made to upgrade or customize this technology for industrial purposes. Laser micro sintering (LMS) is one of those modifications: Powders with particles in the range of a few micrometers are used to obtain products with highly resolved structures. Pulses of a q-switched laser had been considered necessary in order to generate sinter layers from the micrometer scaled metal powders. LMS has been applied with powders from metals as well as from ceramic and cermet feedstock's to generate micro parts. Recent technological progress and the application of high brilliant continuous laser radiation have now allowed an efficient laser sintering/melting of micrometer scaled metal powders. Thereby it is remarkable that thin sinter layers are generated using high continuous laser power. The principles of the process, the state of the art in LMS concerning its advantages and limitations and furthermore the latest results of the recent development of this technology will be presented. Laser Micro Sintering / Laser Micro Melting (LMM) offer a vision for a new dimension of additive fabrication of miniature and precise parts also with application potential in all engineering fields.

  2. Decolorization of synthetic brilliant green carpet industry dye through fungal co-culture technology.

    Science.gov (United States)

    Kumari, Simpal; Naraian, Ram

    2016-09-15

    Aim of the present study was to evaluate the efficiency of fungal co-culture for the decolorization of synthetic brilliant green carpet industry dye. For this purpose two lignocellulolytic fungi Pleurotus florida (PF) and Rhizoctonia solani (RS) were employed. The study includes determination of enzyme profiles (laccase and peroxidase), dye decolorization efficiency of co-culture and crude enzyme extracts. Both fungi produced laccase and Mn peroxidase and successfully decolorized solutions of different concentrations (2.0, 4.0, 6.0, & 8.0(w/v) of dye. The co-culture resulted highest 98.54% dye decolorization at 2% (w/v) of dye as compared to monocultures (82.12% with PF and 68.89% with RS) during 12 days of submerged fermentation. The lower levels of dyes were rapidly decolorized, while higher levels in slow order as 87.67% decolorization of 8% dye. The promising achievement of the study was remarkable decolorizing efficiency of co-culture over monocultures. The direct treatment of the mono and co-culture enzyme extracts to dye also influenced remarkable. The highest enzymatic decolorization was through combined (PF and RS) extracts, while lesser by monoculture extracts. Based on the observations and potentiality of co-culture technology; further it can be exploited for the bioremediation of areas contaminated with hazardous environmental pollutants including textile and other industry effluents. PMID:27228082

  3. Kinetics of adsorptive removal of drimarene brilliant red from aqueous solution using untreated agricultural residues

    International Nuclear Information System (INIS)

    The potential of untreated banana and orange peels, and rice husk was tested for drimarene brilliant red (DBR) dye removal from aqueous solution. Kinetics was also studied in a batch experiment. Dose of adsorbents varied from 6 to 12 g/L, particle sizes 0.2 and 0.8 mm and contact time 2-32 h. High dose and small particle size favoured DBR removal efficiency significantly. The highest adsorption capacity was shown by rice husk (10 mg/g), then orange peels (9 mg/g) and the lowest by banana peels (4 mg/g). Langmuir isotherm (R/super 2/=0.99) and pseudo-second order model (R/super 2/=0.99) depicted well the equilibrium and best explained the kinetics for rice husk, respectively. Initial adsorption appeared as pore diffusion in all the cases and film diffusion was controlling the rate, later on. Based upon the analytical data, a simple model has been presented that fitted best to describe rice husk adsorption kinetics. (author)

  4. EC/β+ ratio and β-delayed γ-decay of 146Eu

    International Nuclear Information System (INIS)

    The positron decay of 146Eu was investigated, firstly to derive for the allowed transition to the 2046 keV state in 146Sm the electron capture to positron decay ratio. The experimental value EC/β+ = 43.7(42) is found to be in agreement within the respective error intervals with the ones calculated from the formalism of allowed decay using the recent Q-values of 146Eu. Further on, the γ-decay properties of 146Eu have been reinvestigated with emphasis on implied modifications of the hitherto accepted decay scheme: 42 new levels and 33 new γ-transitions were placed in the revised level scheme, 12 of the previously reported levels were deleted. The level distribution of 146Sm is discussed within a statistical model. The indication for a non-statistical β-strength function is observed. (orig.)

  5. Sino-EU Security Relations

    Institute of Scientific and Technical Information of China (English)

    Xia Liping

    2010-01-01

    @@ There are two levels of security relations between China and the EU.The first level is that of China and the EU as a whole.The second level is that between China and member states of the EU respectively.Because the Common Foreign and Security Policy of the EU is still in an initial phase,defense relations between China and the EU have mainly been at the second level.

  6. Role of reductant and photosensitizers in solar energy conversion and storage: Oxalic acid-brilliant cresyl system

    International Nuclear Information System (INIS)

    Photo-galvanic effects were studied in a photo-galvanic cell containing oxalic acid as reductant and Brilliant Cresyl as photosensitizers. The photo potential and photo current generated were 320.0 mV and 80.0 uA, respectively. The effects of different parameters on the electrical output of the cell were observed and a mechanism has also been proposed for the generation of a photocurrent in a photo-galvanic cell. (author)

  7. »Brilliant Blue G« and »Membrane Blue Dual« assisted Vitrectomy for Macular Hole

    OpenAIRE

    Kovačević, Damir; Čaljkušić Mance, Tea; Markušić, Vedran

    2011-01-01

    The aim of this study is to evaluate vital dyes »Brilliant Blue G« (BBG) and »Membrane Blue Dual« (MBD) for intraoperative staining of the inner limiting membrane (ILM) during vitrectomy for macular hole (MH). Retrospective, comparative case series on 18 eyes with macular holes who underwent »23 and 25 gauge« pars plana vitrectomy. Main outcome measurements were staining intensity and characteristics, visual acuity, visual field, OCT measurements and complications over a period of...

  8. Sequential epiretinal membrane removal with internal limiting membrane peeling in brilliant blue G-assisted macular surgery

    OpenAIRE

    Schumann, Ricarda G.; Gandorfer, Arnd; Eibl, Kirsten H; Henrich, Paul B; Kampik, Anselm; Haritoglou, Christos

    2010-01-01

    Abstract Purpose. To assess the selectivity of brilliant blue G (BBG) staining by analysing the morphologic components of unstained and stained tissue obtained during epiretinal membrane (ERM) removal with internal limiting membrane (ILM) peeling in BBG-assisted macular surgery. Methods. Twenty-six surgical specimens were removed from 13 eyes with epiretinal gliosis during vitrectomy using BBG for ERM and ILM peeling. We included eyes with idiopathic macular pucker, idiopathic m...

  9. Sierra/SM theory manual.

    Energy Technology Data Exchange (ETDEWEB)

    Crane, Nathan Karl

    2013-07-01

    Presented in this document are the theoretical aspects of capabilities contained in the Sierra/SM code. This manuscript serves as an ideal starting point for understanding the theoretical foundations of the code. For a comprehensive study of these capabilities, the reader is encouraged to explore the many references to scientific articles and textbooks contained in this manual. It is important to point out that some capabilities are still in development and may not be presented in this document. Further updates to this manuscript will be made as these capabilites come closer to production level.

  10. Urheilutapahtuman ilmesuunnittelu : Judo SM2011

    OpenAIRE

    Leppänen, Nette

    2013-01-01

    Opinnäytetyössä käsitellään visuaalisen ilmeen suunnittelua urheilutapahtumalle. Opinnäytetyön tavoitteena oli suunnitella Judon SM2011-kisoille tapahtumailme, jolla tavoitetaan potentiaalinen kisayleisö sekä sponsorit, ja jonka avulla kasvatetaan myös lajin tunnettavuutta yleisellä tasolla. Koska kisoilla ei tähän mennessä ole ollut varsinaista kisatunnusta tai muuta graafista ilmettä, suunnittelu lähtee puhtaalta pöydältä, ottaen kuitenkin huomioon asiakkaan asettamat reunaehdot sekä judon ...

  11. Decolorization of reactive brilliant red K-2BP by white rot fungus under sterile and non-sterile conditions

    Institute of Scientific and Technical Information of China (English)

    GAO Da-wen; WEN Xiang-hua; QIAN Yi

    2006-01-01

    Almost all the studies both domestic and international using white rot fungus for dye wastewater treatment are performed under sterile conditions. However, it is obviously unpractical that wastewater with dyes is treated under sterile conditions. A feasible study was made for using white rot fungus Phanerochaete chrysosporium to degrade reactive brilliant red K-2BP dye under non-sterile conditions. The results showed that there was no decolorizing effect under non-sterile condition if white rot fungus was incubated under non-sterile condition, and the decolorization was always near to 0% during decolorizing test for 3 d; in the meantime, a lot of yeast funguses were found in liquid medium when white rot fungus was incubated under non-sterile conditions; however, if white rot fungus was incubated under sterile condition firstly, its decolorization was above 90% under non-sterile condition, which was similar to that of sterile condition. So we point out that the treating process for wastewater with dyes should be divided into two stages. The first stage is that white rot fungus should be incubated under sterile conditions, and the second stage is that reactive brilliant red K-2BP is decolorized under non-sterile conditions. The method not only save the operation cost which decolorizing reactive brilliant red K-2BP under sterile condition, but also provide the feasibility for using white rot fungus to degrade wastewater with dyes under non-sterile conditions.

  12. Dielectric function of SmS

    International Nuclear Information System (INIS)

    The dielectric response function of SmS and SmAs has been determined via a Kramers-Kronig transformation of the room temperature reflectivity in the range from 10-2 eV to 22 eV. In SmS the assignment of optical transitions, including those from the (S) 3s core level, has been corroborated by the corresponding ones of SmAs. Reductions of the 4f binding energy are revealed in optical f→d transitions as compared to x-ray photoemission data. (author)

  13. Multiresidue method for the triphenylmethane dyes in fish: Malachite green, crystal (gentian) violet, and brilliant green

    International Nuclear Information System (INIS)

    Liquid chromatographic methods are presented for the quantitative and confirmatory determination of crystal violet (CV; also known as gentian violet), leucocrystal violet (LCV), brilliant green (BG), and leucobrilliant green (LBG) in catfish. LCV and LBG were oxidized to the chromic CV and BG by reaction with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, and residues were measured as the combined CV ± LCV and BG ± LBG. These methods are extensions of published methods for malachite green (MG) analysis to allow simultaneous determination of MG, CV, and BG. Residues were extracted from muscle with ammonium acetate buffer and acetonitrile, and extracts cleaned up using dichloromethane partitioning and solid-phase extraction. Extracts were analyzed by liquid chromatography with visible detection (LC-VIS). The method was validated for catfish fortified with LCV over the range 0.25-10 ng g-1 and CV at 2 ng g-1. Average recoveries were 90.6% (±8.1% R.S.D., n = 45) for LCV and 84.4% (±4.2% R.S.D., n = 6) for CV. The average recovery for samples fortified with BG or LBG over the range 0.5-10 ng g-1 was 67.2% (±14.8% R.S.D., n = 31). CV and BG were confirmed in fish extracts by ion trap LC-mass spectrometry (LC-MSn) with no discharge-atmospheric pressure chemical ionization. Average LC-MSn recoveries were 96.5, 96.6, and 70.2% for samples fortified with CV, LCV, and BG or LBG. The limits of detection for CV, BG, and MG were in the range of 0.07-0.24 ng g-1 (ppb) for the two different instrumental methods. This methodology was applied to the analysis of catfish treated with CV and BG

  14. A practical method to generate brilliant hard x-rays with a tabletop electron storage ring

    Energy Technology Data Exchange (ETDEWEB)

    Yamada, H. [Ritsumeikan Univ., Shiga (Japan); Amano, D.; Miyade, H. [Sumitomo Heavy Industries, Ltd., Tanashi-City (Japan)

    1995-12-31

    With electron storage rings not only synchrotron radiation(SR) but also bremsstrahlung(BS) from a thin target placed in the electron orbit are mechanisms to generate brilliant x-ray beams. The calculated brilliance of BS with a 50 MeV storage ring, which is nearly 10{sup 13} photons/s, mrad{sup 2}, mm{sup 2}, 0.1% band width for 100 keV x-rays, exceeds that of SR from a 1 GeV storage ring. This photon energy spectrum is almost constant and extend up to the electron energy. The reasons for this high brilliance with this new radiation scheme is that the electron beams penetrating the thin target are utilized repeatedly, the narrow angular divergence of BS is determined by the kinematics of relativistic electron as same as SR, and the x-ray source size of the order of 1 {mu}m is determined by the size of thin target instead of electron beam sizes. Continuous injection of electron beam to the storage ring at full energy is the way to keep high and constant beam current. Peak current and repetition rate determine x-ray out put power. Note that the power of x-ray beam is also provided from a RF cavity of the storage ring. In this paper we will report some experimental results and discuss further application on a coherent bremsstrahlung generated from a set of stacked foils placed in the electron orbit of the ring. Resulting from these investigations the photon storage ring which is based on a 50 MeV exact circular electron storage ring could provide wide range of coherent and incoherent radiations from far infrared to hard x-ray in a practical amount of radiation power.

  15. Brilliant radiation sources by laser-plasma accelerators and optical undulators

    Energy Technology Data Exchange (ETDEWEB)

    Debus, Alexander

    2012-09-06

    This thesis investigates the use of high-power lasers for synchrotron radiation sources with high brilliance, from the EUV to the hard X-ray spectral range. Hereby lasers accelerate electrons by laser-wakefield acceleration (LWFA), act as optical undulators, or both. Experimental evidence shows for the first time that LWFA electron bunches are shorter than the driving laser and have a length scale comparable to the plasma wavelength. Furthermore, a first proof of principle experiment demonstrates that LWFA electrons can be exploited to generate undulator radiation. Building upon these experimental findings, as well as extensive numerical simulations of Thomson scattering, the theoretical foundations of a novel interaction geometry for laser-matter interaction are developed. This new method is very general and when tailored towards relativistically moving targets not being limited by the focusability (Rayleigh length) of the laser, while it does not require a waveguide. In a theoretical investigation of Thomson scattering, the optical analogue of undulator radiation, the limits of Thomson sources in scaling towards higher peak brilliances are highlighted. This leads to a novel method for generating brilliant, highly tunable X-ray sources, which is highly energy efficient by circumventing the laser Rayleigh limit through a novel traveling-wave Thomson scattering (TWTS) geometry. This new method suggests increases in X-ray photon yields of 2-3 orders of magnitudes using existing lasers and a way towards efficient, optical undulators to drive a free-electron laser. The results presented here extend far beyond the scope of this work. The possibility to use lasers as particle accelerators, as well as optical undulators, leads to very compact and energy efficient synchrotron sources. The resulting monoenergetic radiation of high brilliance in a range from extreme ultraviolet (EUV) to hard X-ray radiation is of fundamental importance for basic research, medical

  16. Brilliant radiation sources by laser-plasma accelerators and optical undulators

    International Nuclear Information System (INIS)

    This thesis investigates the use of high-power lasers for synchrotron radiation sources with high brilliance, from the EUV to the hard X-ray spectral range. Hereby lasers accelerate electrons by laser-wakefield acceleration (LWFA), act as optical undulators, or both. Experimental evidence shows for the first time that LWFA electron bunches are shorter than the driving laser and have a length scale comparable to the plasma wavelength. Furthermore, a first proof of principle experiment demonstrates that LWFA electrons can be exploited to generate undulator radiation. Building upon these experimental findings, as well as extensive numerical simulations of Thomson scattering, the theoretical foundations of a novel interaction geometry for laser-matter interaction are developed. This new method is very general and when tailored towards relativistically moving targets not being limited by the focusability (Rayleigh length) of the laser, while it does not require a waveguide. In a theoretical investigation of Thomson scattering, the optical analogue of undulator radiation, the limits of Thomson sources in scaling towards higher peak brilliances are highlighted. This leads to a novel method for generating brilliant, highly tunable X-ray sources, which is highly energy efficient by circumventing the laser Rayleigh limit through a novel traveling-wave Thomson scattering (TWTS) geometry. This new method suggests increases in X-ray photon yields of 2-3 orders of magnitudes using existing lasers and a way towards efficient, optical undulators to drive a free-electron laser. The results presented here extend far beyond the scope of this work. The possibility to use lasers as particle accelerators, as well as optical undulators, leads to very compact and energy efficient synchrotron sources. The resulting monoenergetic radiation of high brilliance in a range from extreme ultraviolet (EUV) to hard X-ray radiation is of fundamental importance for basic research, medical

  17. Phase equilibria in SmS-In2S3, SmSe-In23Se3 and SmTe-In2Te3 systems

    International Nuclear Information System (INIS)

    Phase equilibria are studied for the first time and state diagrams of SmS-In2S3, SmSe-In23Se3 and SmTe-In2Te3 systems are plotted for the first time using physicochemical analysis techniques. Formations of SmIn2S4, SmIN-4S7, SmIn2Se4 and SmIn2Te4 composition samarium chalcoindates and limited ranges of solubility characteristic for indium sesqui-chalcogenites are determined. SmIn2S4 compound is melted congruently under 1570 K, while SmIn4S7, SmIn2Se4 and SmIn2Te4 are formed by peritectic reaction

  18. EU and Vietnam

    DEFF Research Database (Denmark)

    Kokko, Ari

    This paper discusses the changing relationship between the EU and Vietnam, and asks whether there is a shift from a “parental” to a “competitive” relationship. The focus of the paper is on the shift from aid to trade as the main interface between the EU and Vietnam. Aid relationships are often...... understood as hierarchical, linking a benevolent donor to a needy recipient, whereas commercial relationships are typically expected to involve a more competitive relationship. However, we argue that the bilateral relationship was never a “parental” one, even at the time when Vietnam’s relation to the EU was...... limited to aid. The reason is largely Vietnam’s historical experiences from the aid relationship with the Soviet Union, which created dependence and eventually an economic crisis when aid flows dried up in the late 1980s. Instead, there has been substantial tension between the donor community and Vietnam...

  19. The EU and China

    DEFF Research Database (Denmark)

    Zank, Wolfgang

    In September 2004 David Shambaugh, of George Washington University, published a small article under the heading: “China and Europe: The Emerging Axis.” In his view, one “of the most important, yet least appreciated developments … has been the dramatic growth in ties between China and Europe......” (Shambaugh 2004, 243). He pointed, firstly, at the strong growth in trade relations; the EU also became the largest foreign supplier of technology and equipment, in the form of direct investment, but also through a number of joint technology projects. The EU-China Framework Program became the world’s largest...

  20. The expanding EU

    DEFF Research Database (Denmark)

    Zank, Wolfgang

    identity in terms of particular cultural traditions. However, in spite of their diversity, the EU-member countries are united by their adherence to the principles of democracy, rule by law and human rights. Countries which do not share this basic consensus would not be accepted as members, nor is it likely...... that they would apply for it. An essential part is the willingness of member states to accept a reduction of national sovereignty on some important policy fields. The EU project is basically about lifting the principles of democracy and rule by law on the international level, most and foremost among...

  1. Nitrate ion association with Sm3+ ion

    International Nuclear Information System (INIS)

    A solvent extraction method with TBP as an extractant was used for the determination of the stability constants K10 for the SmNO32+ complex, for different least approach distances aa of ions. It was established that aa=6.5A for SmNO32+. (Author)

  2. The occurrence of the phase Sm Co C2 in Sm Co5 magnets

    International Nuclear Information System (INIS)

    Besides the matrix phase Sm Co5, it is commonly recognized that magnets of Sm Co 1:5 type present three other microstructural constituents: pores, oxides and Sm2 Co7. In addition to those, evidence is offered about the presence of another phase, Sm-Co raw-material powder contains about 0.03%C and it may be increased during milling, by reaction with the carbon-containing protection fluid. The Sm Co C2 carbide was identified by electron probe microanalysis, WDS and X-ray diffraction. (author)

  3. Distinguishing a SM-like MSSM Higgs boson from SM Higgs boson at muon collider

    Indian Academy of Sciences (India)

    Jai Kumar Singhal; Sardar Singh; Ashok K Nagawat

    2007-06-01

    We explore the possibility of distinguishing the SM-like MSSM Higgs boson from the SM Higgs boson via Higgs boson pair production at future muon collider. We study the behavior of the production cross-section in SM and MSSM with Higgs boson mass for various MSSM parameters tan and A. We observe that at fixed CM energy, in the SM, the total cross-section increases with the increase in Higgs boson mass whereas this trend is reversed for the MSSM. The changes that occur for the MSSM in comparison to the SM predictions are quantified in terms of the relative percentage deviation in cross-section. The observed deviations in cross-section for different choices of Higgs boson masses suggest that the measurements of the cross-section could possibly distinguish the SM-like MSSM Higgs boson from the SM Higgs boson.

  4. On the role of Sm in solidification of Al-Sm metallic glasses

    CERN Document Server

    Bokas, G B; Perepezko, J H; Szlufarska, I

    2016-01-01

    During the solidification of Al-Sm metallic glasses the evolution of the supercooled liquid atomic structure has been identified with an increasing population of icosahedral-like clusters with increasing Sm concentration. These clusters exhibit slower kinetics compared to the remaining clusters in the liquid leading to enhanced amorphous phase stability and glass forming ability (GFA). Maximum icosahedral-ordering and atomic packing density have been found for the Al90Sm10 and Al85Sm15 alloys, respectively, whereas minimum cohesive energy has been found for the Al93Sm7 which is consistent with the range of compositions (from Al92Sm8 to Al84Sm16) found experimentally with high GFA.

  5. EU Food Law Handbook

    NARCIS (Netherlands)

    Meulen, van der B.M.J.

    2014-01-01

    The twenty-first century has witnessed a fundamental reform of food law in the European Union, to the point where modern EU food law has now come of age. This book presents the most significant elements of these legal developments with contributions from a highly qualified team of academics and prac

  6. EU Agro Biogas Project

    NARCIS (Netherlands)

    Amon, T.; Mayr, H.; Eder, M.; Hobbs, P.; Rao Ravella, S.; Roth, U.; Niebaum, A.; Doehler, H.; Weiland, P.; Abdoun, E.; Moser, A.; Lyson, M.; Heiermann, M.; Plöchl, M.; Budde, J.; Schattauer, A.; Suarez, T.; Möller, H.; Ward, A.; Hillen, F.; Sulima, P.; Oniszk-Polplawska, A.; Krampe, P.; Pastorek, Z.; Kara, J.; Mazancova, J.; Dooren, van H.J.C.; Wim, C.; Gioelli, F.; Balsari, P.

    2009-01-01

    EU-AGRO-BIOGAS is a European Biogas initiative to improve the yield of agricultural biogas plants in Europe, to optimise biogas technology and processes and to improve the efficiency in all parts of the production chain from feedstock to biogas utilisation. Leading European research institutions and

  7. EU-PIL

    DEFF Research Database (Denmark)

    Lookofsky, Joseph; Hertz, Ketilbjørn

    Now in a Second Edition comprising the Brussels I Regulation “recast”, as well as other key EU legislation and case law, this book brings together principles of juridical jurisdiction, choice of law, recognition of judgments and commercial arbitration. It shows the interrelationship of the rules...... and their effect on cases in the European Union....

  8. Activation cross-sections of proton induced reactions on natSm up to 65 MeV

    International Nuclear Information System (INIS)

    Highlights: •Proton induced reactions on natural samarium up to 65 MeV. •Stacked foil irradiation technique. •Comparison of experimental results with the ALICE, EMPIRE and TALYS theoretical model codes. •Calculation and comparison of thick target integral yields. -- Abstract: Activation cross sections for proton induced reactions on Sm are presented for the first time for natSm(p,xn)154,152m2,152m1,152g,150m,150g,149,148,147,146,145Eu, natSm(p,x)153,145Sm, natSm(p,x)151,150,149,148g,148m,146,144,143Pm and natSm(p,x)141Nd up to 65 MeV. The cross sections were measured via activation method by using a stacked-foil irradiation technique and high resolution gamma ray spectroscopy. The results were compared with results of the nuclear reaction codes ALICE, EMPIRE and TALYS (results taken from TENDL libraries). Integral yields of the activation products were calculated from the excitation functions

  9. Study of the nuclear structure of 155Eu

    International Nuclear Information System (INIS)

    The 155Eu nuclide was investigated by the directional angular correlation technique following the β decay of 155Sm. The angular correlation measurements were carried out using a setup with 4 Ge detectors and a multi parametric data acquisition system. To perform the data analysis a new methodology was developed . The multipole mixing ratios of twenty sixty γ- transitions were determined. Seven of them agreed with the results of earlier angular correlation studies and nineteen obtained for the first time confirmed the multipolarity suggested in earlier electron capture studies. Besides, the spin of the level at 1106.83 keV as well as the parity of the level at 1301.41 keV have also been suggested. The nuclear structure of 155Eu was discussed successfully in terms of the single particle model using a deformed Woods-Saxon potential plus residual pairing interaction permitting the description of the rotational quasi-proton band heads. (author)

  10. Study of the nuclear structure of {sup 155}Eu; Estudo da estrutura nuclear do {sup 155}Eu

    Energy Technology Data Exchange (ETDEWEB)

    Genezini, Frederico Antonio

    2004-07-01

    The {sup 155}Eu nuclide was investigated by the directional angular correlation technique following the {beta} decay of {sup 155}Sm. The angular correlation measurements were carried out using a setup with 4 Ge detectors and a multi parametric data acquisition system. To perform the data analysis a new methodology was developed . The multipole mixing ratios of twenty sixty {gamma}- transitions were determined. Seven of them agreed with the results of earlier angular correlation studies and nineteen obtained for the first time confirmed the multipolarity suggested in earlier electron capture studies. Besides, the spin of the level at 1106.83 keV as well as the parity of the level at 1301.41 keV have also been suggested. The nuclear structure of {sup 155}Eu was discussed successfully in terms of the single particle model using a deformed Woods-Saxon potential plus residual pairing interaction permitting the description of the rotational quasi-proton band heads. (author)

  11. Luminescence and spectroscopic properties of Sm2+ and Er3+ doped SrI2

    International Nuclear Information System (INIS)

    The scintillation and luminescence properties of SrI2:1% Sm2+ and SrI2:1% Er3+ are reported. Single crystals were grown by the vertical Bridgman technique. Broad band Sm2+ 5d–4f emission was observed centered at 750 nm with a radiative lifetime of 1.25 µs. The photoluminescence decay time increases with temperature due to self-absorption. With Er3+ a clear charge transfer band was identified at 295 nm. The spectroscopic properties of Sm2+ and Er3+ are compared with those of Eu2+, Yb2+, Ce3+, and Nd3+ doped in SrI2. The results are combined to construct a diagram with the vacuum referred electron binding energies for all divalent and trivalent lanthanide ions in SrI2 which is fully consistent with the spectroscopic observations. - Highlights: • 750nm 5d–4f emission has been observed for Sm2+ in SrI2. • A valence band to Er3+ charge band has been observed for Er3+ in SrI2. • A binding energy diagram has been constructed from data on lanthanides in SrI2

  12. Electronic configurations of Sm2+ in SmS and SmB6, and electrical properties

    International Nuclear Information System (INIS)

    In Dirac's theory the 4f shell is divided into two subshells: 4f/sub 5/2/ with six quantum states and 4f/sub 7/2/ with eight quantum states. Assuming that these two subshells can be filled up successively, we had successfully obtained the saturation magnetic moment of the garnets Ln3Fe5O12. This study is devoted to establish the role of the subshells in the case of SmS phase transformation under pressure P. Particularly for Sm2+ the low spin configuration 4f/sub 5/2/6 4f/sub 7/2/0 which with six 4f electrons has a filled subshell 4f/sub 5/2/ leading to a zero magnetic moment. But as the insulator in equilibrium metal I in equilibrium M transition exhibited with this phase transition, is explained through a valence change, we first consider the localized electron model proposed in the case of Fe3O4 to show that large variations of electrical resistivity of SmS and SmB6 also can be understood through this model. A result which allows us to consider the ion Sm2+ in both phases of SmS. 1 figure

  13. 'EU divertor celebration day'

    International Nuclear Information System (INIS)

    The meeting 'EU divertor celebration day' organized on 16 January 2002 at Plansee AG, Reutte, Austria was held on the occasion of the completion of manufacturing activities of a complete set of near full-scale prototypes of divertor components including the vertical target, the dome liner and the cassette body. About 30 participants attended the meeting including Dr. Robert Aymar, ITER Director, representatives from EFDA, CEA, ENEA, IPP and others

  14. Interaction in the systems Bi2S3-SmS and Bi2S3-Sm2S3

    International Nuclear Information System (INIS)

    Methods of physicochemical analysis are used to study Bi2S3-SmS (1) and Bi2S3-Sm2S3 (2) systems that are quasibinary cross sections of Sm-Bi-S ternary system. Formation of ternary phases of SmBi2S4, SmBi4S7 (in system 1) composition and of SmBiS3 composition (in system 2) is stated. The compounds are crystallized in stibnite type rhombic singony: SmBi2S4: a = 12.55; b = 14.11; c = 4.12 A; SmBi4S7: a = 12.61; b = 14.20, c = 4.70 A, SmBiS3: a 11.15, b = 11.77, c = 3.85 A. SmS(Sm2S3) solubility in Bi2S3 at 300 K is 3 mol.%

  15. EU COMPARISON OF VAT

    Directory of Open Access Journals (Sweden)

    MARIA ZENOVIA GRIGORE

    2012-05-01

    Full Text Available VAT is one of the newest tools of the global economy and is widely adopted in most of the countries. For EU Member States is required not only the existence of VAT, but also that its main characteristics to be uniformly implemented. This should facilitate intra-Community transactions, but in practice does not as there are many local variations which can lead to costly errors and penalties. The objective of this paper is to collate data about the main characteristics of VAT in EU Member States and to highlight the key differences between them. This survey shows that there continue to be opportunities and risks for businesses trading cross border, as a result of differences in application of Community legislation on VAT. This led to the necessity of VAT reform. On this basis, the Commission adopted on the end of the last year a Communication on the future of VAT. This sets out the fundamental characteristics that must underlie the new VAT regime, and priority actions needed to create a simpler, more efficient and more robust VAT system in the EU.

  16. Thermodynamic properties of Sm2S3 and SmS2 within wide temperature range

    International Nuclear Information System (INIS)

    For the first time using the mixing method in a wide temperature range inthalpies of Sm2S3 and SmS2 are determined. An intense increase of Sm2S3 enthalpy is observed in the high temperature range and the melting point for this compound is determined. The basic thermodynamic characteristics (enthalpy, thermal capacity, entropy, reduced Gibbs energy) of studied sulfides are calculated

  17. Oral Triphenylmethane Food Dye Analog, Brilliant Blue G, Prevents Neuronal Loss in APPSwDI/NOS2-/- Mouse Model.

    Science.gov (United States)

    Irwin, Jacob A; Erisir, Alev; Kwon, Inchan

    2016-01-01

    Reducing amyloid-β (Aβ) accumulation is a promising strategy for developing Alzheimer's Disease (AD) therapeutics. We recently reported that a triphenylmethane food dye analog, Brilliant Blue G (BBG), is a dose-dependent modulator of in vitro amyloid-β aggregation and cytotoxicity in cell-based assays. Following up on this recent work, we sought to further evaluate this novel modulator in a therapeutically-relevant AD transgenic mouse model. BBG was orally administered to APPSwDI/NOS2-/- mice for three months in order to assess its biocompatibility, its permeability across the blood-brain barrier, and its efficacy at rescuing AD pathology. The results showed that BBG was well-tolerated, caused no significant weight change/unusual behavior, and was able to significantly cross the AD blood-brain barrier in APPSwDI/NOS2-/- mice. Immunohistochemical and electron microscopic analysis of the brain sections revealed that BBG was able to significantly prevent neuronal loss and reduce intracellular APP/Aβ in hippocampal neurons. This is the first report of 1) the effect of Brilliant Blue G on neuronal loss in a transgenic animal model of AD, 2) oral administration of BBG to affect a protein conformation/aggregation disease, and 3) electron microscopic ultrastructural analysis of AD pathology in APPSwDI/NOS2-/- mice. PMID:26852943

  18. Expectation for medium-sized highly brilliant synchrotron radiation ring. Prospects for soft X-ray surface/interface sciences

    International Nuclear Information System (INIS)

    The use of medium-sized highly brilliant soft X-ray synchrotron radiation (SR) enables analyses with much better spatial, energy and time resolution, resulting in visualizing surface/interface electronic structure in nano regions. In order to improve performances of electronic, magnetic and energy devices, it is required to characterize and control electronic structures. In the world, several SR rings with the emittance of less than 1 nmrad are being constructed, aiming at revolutionary progress of surface/interface sciences using soft X-rays. Although we have constructed the University of Tokyo Outstation at SPring-8 for soft X-ray surface/interface sciences, medium-sized highly brilliant SR ring is strongly required for further development in this field. In this article, nano-region photoelectron spectroscopy for graphene FET and ReRAM, soft X-ray emission spectroscopy for fuel cells and Li ion batteries, and time-resolved photoelectron spectroscopy for photocatalysts are introduced, and future prospects of soft X-ray surface/interface sciences are discussed. (author)

  19. Decolorization of Remazol Brilliant Blue Dye Effluent by Advanced Photo Oxidation Process (H2O2/UV system

    Directory of Open Access Journals (Sweden)

    A. S. Mahmoud

    2007-01-01

    Full Text Available Advanced photo oxidation processes hold great promise for the improved treatment of textile dye effluent. In this study, the effectiveness of a H2O2/UV system for the decolorization of remazol brilliant blue effluent was investigated by examining the optimum conditions for dye removal in two reactors (coil and conventional. The results showed that the coil reactor had a higher temperature profile than the conventional reactor. When the dye was fed into the reactors at 25˚C, UV radiation alone was not effective as the decolorization efficiency of the conventional reactor varied from 0.0 to 12.3%, while that of the coil reactor varied from 0.0 to 7.3%, depending on the residence time used. The effect of UV radiation at 100˚C was also negligible as the maximum decolorization efficiencies were 4.0 and 3.7% for the conventional and the coil reactors, respectively. Increasing the concentration of H2O2 increased decolorization efficiencies of both UV reactors. Dye decolorization also increased with residence time. More than 93% color removal of remazol brilliant blue dye was achieved with a residence time of 56 min and 100% decolorization achieved in 65 min using a H2O2 concentration of 12.50 mL Lˉ1.

  20. About defect structure in SmS

    International Nuclear Information System (INIS)

    One managed to obtain the experimental dependence of the conduction band electron concentration on the sizes of X-ray radiation coherent scattering regions. The curve analysis was based on the previously elaborated concentration model of SmS energy spectrum. The impurity donor levels in SmS were shown to correlate with samarium defective ions located at the boundaries of the coherent scattering regions

  1. Fusiblility diagram of the SmS-Sm2S3 system

    International Nuclear Information System (INIS)

    Isobaric fusibility diagram of a part of the binary Sm-S system lying between SmS-Sm2S3 compounds within 1500-2100 deg C temperature range was built on the basis of the data of physicochemical analysis (thermal, annealing and quenching, microstructural, durometric and X-ray phase). Consistency of data from different methods indicates at the reliability and confidence of the presented diagram. The analogy of Sm-S system fusibility diagram with La-S system diagram is noted

  2. Provably-secure (Chinese government) SM2 and simplified SM2 key exchange protocols.

    Science.gov (United States)

    Yang, Ang; Nam, Junghyun; Kim, Moonseong; Choo, Kim-Kwang Raymond

    2014-01-01

    We revisit the SM2 protocol, which is widely used in Chinese commercial applications and by Chinese government agencies. Although it is by now standard practice for protocol designers to provide security proofs in widely accepted security models in order to assure protocol implementers of their security properties, the SM2 protocol does not have a proof of security. In this paper, we prove the security of the SM2 protocol in the widely accepted indistinguishability-based Bellare-Rogaway model under the elliptic curve discrete logarithm problem (ECDLP) assumption. We also present a simplified and more efficient version of the SM2 protocol with an accompanying security proof. PMID:25276863

  3. Curie temperature rising by fluorination for Sm2Fe17

    Directory of Open Access Journals (Sweden)

    Matahiro Komuro

    2013-02-01

    Full Text Available Fluorine atoms can be introduced to Sm2Fe17 using XeF2 below 423 K. The resulting fluorinated Sm2Fe17 powders have ferromagnetic phases containing Sm2Fe17FY1(0Sm2Fe17FY2 (1Sm2Fe17, and α-Fe. The unit cell for Sm2Fe17 is elongated by the fluorination. The largest unit cell volume among the rhombohedral Sm2Fe17 compounds is 83.8 nm3, which is 5.8% larger than Sm2Fe17. The rhombohedral Sm2Fe17 with the largest unit cell volume is dissociated above 873 K, and fluorination increases Curie temperature from 403 K for Sm2Fe17 to 675 K. This increase can be explained by the magneto-volume effect.

  4. Mikrofinance v EU

    OpenAIRE

    Odstrčilíková, Linda

    2012-01-01

    This work deals with microfinance in the EU. It explains the relationship among the EU instruments, programmes and initiatives, and it brings the most important information about all available products for both potential providers and potential clients. The work focuses mainly on the European Progress Microfinance Facility and its supporting products. It also contains brief historic development of microfinance, information about financing of microcredits in the EU, real life examples and crit...

  5. Projects Financing from EU Funds

    OpenAIRE

    Prokešová, Lenka

    2011-01-01

    The diploma thesis is evaluating financing of certain project from EU funds and further comparison with other financing methods. At the end there is final evaluation if financing of this project can be sourced from EU funds. In theoretical part of work there are characteristics of structural and regional policies with financing from EU funds. Focus is for Operational Program Enterprise and Innovations, Program of support development. In practical part there is continuation of company introduc...

  6. Smärta och smärtlindring hos äldre : -en litteraturstudie

    OpenAIRE

    Kjellberg, Karin

    2012-01-01

    Detta examensarbete är en litteraturstudie om de äldres upplevelser av smärta och metoder för smärtlindring. Uppdragsgivare för detta arbete är Esbo Hemvård. Andelen äldre ökar kraftigt och ändå är hälsorelaterade frågor för den här människogruppen ofta försummade. Syftet med studien var att belysa äldres upplevelser av smärta, beskriva vilka metoder för smärtlindring de äldre föredrar och vad vårdare kan göra för att lindra smärta hos dessa personer. Forskningsfrågor för den här studien var:...

  7. Brillouin spectroscopy on doped SmS

    International Nuclear Information System (INIS)

    SmS becomes intermediate valent at an applied pressure of about 6.5 kbar. On the other hand, SmS doped with La or Tm is already intermediate valent at normal pressure and room temperature. The doping atoms (depending on their concentration) create new occupied states in the SmS gap which lead to the typical hybridised 4fi/4fi-1-5d1-states. The La-cation is always trivalent in LaS, whereas the Tm-cation has a valence between 2 and 3. Therefore, we expect to see a difference in the intermediate valent behaviour. A strong evidence of intermediate valence is a negative C12 and a negative Poisson's ratio. Using high-resolution Brillouin-spectroscopy we measured the phase velocity of the surface acoustic waves in the (100)-plane of Sm1-xLaxS and Sm1-xTmxS. Applying a standard fit-algorithm we calculated all three elastic constants (C11, C12 and C44) from the angular dispersion relation. To get more reliable results the compression-moduli also have been determined and linked to the elastic constants C11 and C12 in the fit model. (orig.)

  8. High-spin spectroscopy of the 142Eu, 143Eu and 144Eu nuclei

    International Nuclear Information System (INIS)

    High-spin level schemes of the 142Eu, 143Eu and 144Eu nuclei have been investigated by in-beam γ-ray spectroscopic methods using the NORDBALL Compton-suppressed multi-detector array. The previously known schemes have been extended to considerably higher spin and excitation energy, up to I∼30, Ex≥9 MeV in 142Eu, I=75/2, Ex=15.6 MeV in 143Eu and I∼40, Ex≥16 MeV in 144Eu. The level schemes are very complicated, characteristic of spherical or slightly oblate nuclei. Also, long cascades of stretched E2 transitions have been observed in all three nuclei. Plunger and DSAM lifetime results demonstrate high collectivity values up to ∝100 W.u. (up to ∝200 W.u. in 142Eu) in these E2 cascades and they are proposed to represent several crossing collective bands with the nucleus at triaxial shape of β2∼0.25 and γ∼30 circle. Low parts of the level schemes have been discussed within the spherical shell model. Below 5.5 MeV excitation in 144Eu and 3.5 MeV in 143Eu practically all the observed levels are interpreted with shell model configurations of respectively two or four, and one or three quasiparticles. (orig.)

  9. Experimental Study on Decolorization and Degradation of Reactive Brilliant Red X—3B in a White Rot Fungal Biofilm Reacor

    Institute of Scientific and Technical Information of China (English)

    HUANGMin-sheng; HUANGRong; 等

    2001-01-01

    Experimental results of an azo dye(reactive brilliant red X-3B,RBR X-3B) decolorization and degradation in a white rot fungal biofilm reactor were introduced and discussed.The fungal biofilm reactor is highly potential for dye decolorization and degradation with the highest decoloring rate of 95% within 96 hours reaction time at initial pH 4.5 under high nirogen level (HN) (24mmol/L ammonium tartrate)condition.Experimental conditions.such as nutrient nitrogen levels in reaction mixture and initial pH,significantly affected dye decolorization and degradation.Effluents from this bioilm reactor can be well treated to meet the discharging requirements by use of chemical flocculation.RBR X-3B was first absorbed onto fungal biomass and then degraded gradually,The SH-13 fungus monopolized the biofilm throughout the experiments,though the reactor was exposed to open air for 4 months.

  10. The failure analysis, redesign, and final preparation of the Brilliant Eyes Thermal Storage Unit for flight testing

    Science.gov (United States)

    Lamkin, T.; Whitney, Brian

    1995-01-01

    This paper describes the engineering thought process behind the failure analysis, redesign, and rework of the flight hardware for the Brilliant Eyes Thermal Storage Unit (BETSU) experiment. This experiment was designed to study the zero-g performance of 2-methylpentane as a suitable phase change material. This hydrocarbon served as the cryogenic storage medium for the BETSU experiment which was flown 04 Mar 94 on board Shuttle STS-62. Ground testing had indicated satisfactory performance of the BETSU at the 120 Kelvin design temperature. However, questions remained as to the micro-gravity performance of this unit; potential deviations in ground (1 g) versus space flight (0 g) performance, and how the unit would operate in a realistic space environment undergoing cyclical operation. The preparations and rework performed on the BETSU unit, which failed initial flight qualification, give insight and lessons learned to successfully develop and qualify a space flight experiment.

  11. Highly efficient decomposition of Remazol Brilliant Blue R using tubular reactor coated with thin layer of PdO.

    Science.gov (United States)

    Javaid, Rahat; Qazi, Umair Yaqub; Kawasaki, Shin-Ichiro

    2016-09-15

    In this work, we propose a novel approach to dye decomposition under subcritical water conditions using a continuous-flow tubular reactor coated with thin layer of PdO as a catalyst. Remazole Brilliant Blue R was used as an example of synthetic dyes. Hydrogen peroxide was used as an environmental-friendly oxidant as it leaves no residues after treatment. The effect of temperature, pressure and dye concentration on total organic carbon (TOC) removal were studied. 99.9% of TOC removal was achieved at 300 °C and 10 MPa pressure within a short residence time of 3.2 s. This method provided an efficient and rapid process that has a potential for treating a wide range of textile wastewaters. PMID:27322817

  12. Adsorption of Two Dyes by Mg(OH)2: Procion Blue HB and Remazol Brilliant Blue R

    Science.gov (United States)

    Bouberka, Zohra; Bentaleb, Kahina; Benabbou, Khalil A.; Maschke, Ulrich

    The use of low-cost and ecofriendly adsorbents has been investigated as an ideal alternative to the current expensive methods of removing dyes from wastewater. Mg(OH)2 sludge was produced from precipitation of magnesium ions (Mg2+) with NaOH in pH = 10 and investigated as a low-cost adsorbent. This paper deals with the removal of textile dyes from aqueous solutions by Mg(OH)2. Reactive Procion blue HB (PR) and Acid Remazol brilliant blue R (RB) were used as model compounds. The adsorption capacity was found as 43.47 and 26.89 mg/g at initial pH 6.5.

  13. Anxious EU's future at stake

    OpenAIRE

    O'Brennan, John

    2009-01-01

    IRISH voters go to the polls again on Friday to decide whether to adopt the EU's Lisbon Treaty. The mood in European capitals is nervous; on two of the past three occasions the Irish have been asked to vote on an EU Treaty, they have rejected it.

  14. Minimum Wage in EU Countries

    OpenAIRE

    Emilia BUCUR

    2007-01-01

    This article discusses the possibility that EU will introduce a minimum salary, according to the financial configuration of each member state, presenting benefic effects which this system should bring, such as an improvement of economic conditions and the avoidance of economic collapse. Also, it presents the salary situation at EU level, focusing on the case of Romania.

  15. Trade microenterprises in EU economy

    Directory of Open Access Journals (Sweden)

    Zbigniew Gołaś

    2010-01-01

    Full Text Available The article shows the results of the analysis of positions of microenterprises in trade and repair in European Union (EU economy. The results show that microenterprises make up the most numerous group of economic subjects in EU. In terms of income generation, value added, labour productivity and financial efficiency the position of microenterprises in enterprises sector is conclusively the weakest.

  16. The Challenge to EU Integration

    Institute of Scientific and Technical Information of China (English)

    DING YIFAN

    2010-01-01

    @@ After an unprecedented rescue plan of 750 billion euros was agreed on by the EU finance ministers in early May, the sovereign debt crisis hovering over Greece seems to have been prevented from spreading in the euro zone. But the effectiveness of the bailout package is still questionable and the sovereign debt crisis still poses a threat to EU integration and stability.

  17. Triaxiality in 146,148Sm nuclei

    International Nuclear Information System (INIS)

    Recently, attempts have been made to use the dynamic pairing plus quadrupole model to evaluate B(E2) values, B(E2) branching ratios, and low-lying energy levels for 146,148Sm nuclei, which are in poor agreement with experiment. Application of the boson expansion technique on 148Sm shows too much splitting and an incorrect order for the quintet states, while other properties have not been discussed. In the present work, 146,148Sm nuclei have been described using an asymmetric rotor model framework. The nonaxiality parameter γ has been evaluated using the energy ration E2+'/E6+. Remarkable success has been achieved in explaining the correct ordering of known low-lying energy levels, B(E2) values, and B(E2) branching ratios, which indicate that the so-called spherical nuclei may be treated as triaxial. (author). 8 refs., 9 tabs., 1 fig

  18. Resonant photoemission from SmS(100)

    International Nuclear Information System (INIS)

    A strong, sharp resonance enhancement of 4f photoemission has been observed on SmS(100) surfaces for photon energies in the region of the 4d-4f transitions at about 126 eV. The discrete final state reached via the excitation hν + 4d104f6 → 4d94f7 autoionizes primarily via a super Coster-Kronig transition of the type 4d94f7 → 4d104f5 + unbound electron. Other decay channels, e.g. Sm 5p emission, as well as a surface induce binding energy shift in the Sm3+ final state are identified and discussed. (author)

  19. The Cloud2SM Project

    Science.gov (United States)

    Crinière, Antoine; Dumoulin, Jean; Mevel, Laurent; Andrade-Barosso, Guillermo; Simonin, Matthieu

    2015-04-01

    From the past decades the monitoring of civil engineering structure became a major field of research and development process in the domains of modelling and integrated instrumentation. This increasing of interest can be attributed in part to the need of controlling the aging of such structures and on the other hand to the need to optimize maintenance costs. From this standpoint the project Cloud2SM (Cloud architecture design for Structural Monitoring with in-line Sensors and Models tasking), has been launched to develop a robust information system able to assess the long term monitoring of civil engineering structures as well as interfacing various sensors and data. The specificity of such architecture is to be based on the notion of data processing through physical or statistical models. Thus the data processing, whether material or mathematical, can be seen here as a resource of the main architecture. The project can be divided in various items: -The sensors and their measurement process: Those items provide data to the main architecture and can embed storage or computational resources. Dependent of onboard capacity and the amount of data generated it can be distinguished heavy and light sensors. - The storage resources: Based on the cloud concept this resource can store at least two types of data, raw data and processed ones. - The computational resources: This item includes embedded "pseudo real time" resources as the dedicated computer cluster or computational resources. - The models: Used for the conversion of raw data to meaningful data. Those types of resources inform the system of their needs they can be seen as independents blocks of the system. - The user interface: This item can be divided in various HMI to assess maintaining operation on the sensors or pop-up some information to the user. - The demonstrators: The structures themselves. This project follows previous research works initiated in the European project ISTIMES [1]. It includes the infrared

  20. Eu doping and reduction into barium orthophosphates

    Science.gov (United States)

    Santos, Ricardo D. S.; dos S. Rezende, Marcos V.

    2016-08-01

    We investigated Eu3+ and Eu2+ ion incorporation and the reduction of Eu3+ ions in a LiBaPO4 lattice using atomistic simulations based on lattice energy minimization. We predicted the most probable sites occupied by Eu3+ and Eu2+ ions, and the related charge-compensation mechanisms involved in these substitutions to the most provable reduction agent for Eu reduction. It was found that Eu3+and Eu2+ ions are the most energetically favorable for incorporation at Ba site. In the case of the Eu3+ ion, charge compensation by the LiBa‧ antisite is the most provable. Eu3+ reduction involving a H2 reduction atmosphere is the most favorable. Our results reveal that Eu3+ and Eu2+ position plays an important role in the luminescence characteristic and in the persistent luminescence mechanisms related to LiBaPO4.

  1. EU pharmaceutical expenditure forecast

    Science.gov (United States)

    Urbinati, Duccio; Rémuzat, Cécile; Kornfeld, Åsa; Vataire, Anne-Lise; Cetinsoy, Laurent; Aballéa, Samuel; Mzoughi, Olfa; Toumi, Mondher

    2014-01-01

    Background and Objectives With constant incentives for healthcare payers to contain their pharmaceutical budgets, forecasting has become critically important. Some countries have, for instance, developed pharmaceutical horizon scanning units. The objective of this project was to build a model to assess the net effect of the entrance of new patented medicinal products versus medicinal products going off-patent, with a defined forecast horizon, on selected European Union (EU) Member States’ pharmaceutical budgets. This model took into account population ageing, as well as current and future country-specific pricing, reimbursement, and market access policies (the project was performed for the European Commission; see http://ec.europa.eu/health/healthcare/key_documents/index_en.htm). Method In order to have a representative heterogeneity of EU Member States, the following countries were selected for the analysis: France, Germany, Greece, Hungary, Poland, Portugal, and the United Kingdom. A forecasting period of 5 years (2012–2016) was chosen to assess the net pharmaceutical budget impact. A model for generics and biosimilars was developed for each country. The model estimated a separate and combined effect of the direct and indirect impacts of the patent cliff. A second model, estimating the sales development and the risk of development failure, was developed for new drugs. New drugs were reviewed individually to assess their clinical potential and translate it into commercial potential. The forecast was carried out according to three perspectives (healthcare public payer, society, and manufacturer), and several types of distribution chains (retail, hospital, and combined retail and hospital). Probabilistic and deterministic sensitivity analyses were carried out. Results According to the model, all countries experienced drug budget reductions except Poland (+€41 million). Savings were expected to be the highest in the United Kingdom (−€9,367 million), France

  2. National Courts and EU Law

    DEFF Research Database (Denmark)

    approaches and theories originating from law, political science, sociology and economics. The first section addresses issues relating to judicial dialogue and EU legal mandates, the second looks at the topic of EU law in national courts and the third considers national courts’ roles in protecting fundamental......This insightful and discerning book offers a fresh discourse on the functioning of national courts as decentralised EU courts and a new thematic for revising some older understandings of how national judges apply EU law. Organised into three key sections, the interdisciplinary chapters combine...... rights in the area of freedom, security and justice. The analysis of each is enriched through diverse research methods such as case-law analysis, citation network analysis, interviews, surveys and statistics. With its new legal and empirical assessment covering the newest member states of the EU...

  3. Conceptual Design Plan SM-43 Replacement Project

    Energy Technology Data Exchange (ETDEWEB)

    University of California, Los Alamos National Laboratory, SCC Project Office

    2000-11-01

    The Los Alamos National Laboratory Conceptual Design Plan for the SM-43 Replacement Project outlines plans for replacing the SM-43 Administration Building. Topics include the reasons that replacement is considered a necessity; the roles of the various project sponsors; and descriptions of the proposed site and facilities. Also covered in this proposal is preliminary information on the project schedule, cost estimates, acquisition strategy, risk assessment, NEPA strategy, safety strategy, and safeguards and security. Spreadsheets provide further detail on space requirements, project schedules, and cost estimates.

  4. Rotational hysteresis in SmCo5

    International Nuclear Information System (INIS)

    Torque curves of SmCo5 sintered magnets with regularily lowered coercivity up to a maximum field H = 28 x 105 Am-1 have been registered automatically. From the observed rotational hysteresis the values of the rotational integral could be estimated in dependence on the degree of lowering of the coercivity. By comparison with theoretically calculated values for a simple nucleation model for a single crystal it follows that the mechanism of the magnetization reversal for SmCo5 magnets with lowered coercivity should be pinning of Bloch walls in the multidomain state. The absolute value of the maximum rotational hysteresis work is comparable with the maximum linear hysteresis work. (author)

  5. Krager, husskader og småvildt

    DEFF Research Database (Denmark)

    Asferg, T.

    på kragers og husskaders præda-tion på hare, ager-høne og fasan med særlig fokus på perioden fra det tidlige forår til jagtsæsonens start i efteråret. Derudover er der en kort opsummering af prædationen på småfugle. Mange eksperimenter har vist, at prædation på det jagtbare småvildt kan reduceres...

  6. From EuCARD to EuCARD-2

    CERN Multimedia

    Chaudron, M

    2013-01-01

    The one word that best describes the spirit of the EuCARD ’13 event (see here) that took place from 10 to 14 June at CERN is "collaboration". The event brought together more than 180 accelerator specialists from all over the world to celebrate the conclusion of the EuCARD project and to kick off its successor, EuCARD-2.   EuCARD-2 brings a global view to particle accelerator research in order to address challenges for future generations of accelerators. The project officially began on 1 May 2013 and will run for four years. With a total budget of €23.4 million, including an €8 million EU contribution, it will build upon the success of EuCARD and push it into an even more innovative regime. EuCARD-2 aims to significantly enhance multidisciplinary R&D for European accelerators and will actively contribute to the development of a European Research Area in accelerator science. This will be accomplished by promoting complementary expertise, cross-d...

  7. Optically stimulated luminescence dosimeter based on CaS:Eu,Sm

    International Nuclear Information System (INIS)

    Alkaline earth sulfides (MgS, CaS and BaS) crystal doped with rare-earth ions is an optically stimulated luminescence dosimeter with very high sensitivity, short time constant of the optically stimulated luminescence (OSL) separated perfectly from the stimulation. In this paper, an OSL dosimeter is described, k has linear dose response from 0.01 to 1000 Gy. The equipment, relatively simple and small in size is promising for applications in space exploration and for high dose irradiation and dangerous irradiation conditions. (authors)

  8. Sm3+ and Eu3+ sorption in mixed phosphates of Zr

    International Nuclear Information System (INIS)

    The storage of high level radioactive waste in deep geological repositories is an issue of international research in countries with nuclear reactors. A major risk is the groundwater infiltration, which can cause degradation of the containers and leaching the radioactive waste through the different barriers. The study of materials for use as engineered barriers is fundamental, because if dissolution is present, the elements can be captured, ensuring that radioactive materials do not disperse off. The work is divided in four parts, the first describes the techniques developed for the synthesis of phosphates: NaZr2(PO4) [NZP] and τ-Zr(Na0.06H0.94PO4)2 [TZP-Na], their chemical and morphological characterization, thermal stability and surface area. The obtained NZP shows a diffraction diagram similar to the Jcpds pattern, it has a surface area of 4.9±0.1 m2·g-1. There are not reports of diffraction patterns for TZP-Na, which has a surface area of 22.9±0.40 m2·g-1. The hydrogenphosphate obtained, τ-Zr(HPO4)2, shows a diffraction diagram similar to that reported by Nor by. The second part presents the physicochemical characterization of the phosphates surface. The constants of formation of surface sites and their distribution were calculated using FITEQL 4.0. The sites surface density (ds) were determined from potentiometric titration curves of phosphate, hydrogen phosphate and NaClO4 0.5 M; ds were 3.2 sites nm-2 for NZP and 2.1 sites·nm-2 for TZP-Na. The values of curves formation constants for surface sites were, for NZP: K 1P-O=2, K2P-O=-7, K1Zr-O=6.11, K1Zr-O=7.94, and for TZP-Na: K1P-O=5.14, K2P-O=-7.03, K1Zr-O=2.60, K1Zr-O=-9.85. The third part of the work reports the samarium and europium sorption curves on phosphate and on hydrogenphosphate at different ph values. The values of the curves were fed on FITEQL 4.0 program and NZP surface complexation constants were obtained. The results for the NZP show, for both lanthanides, a monodentate complex at the zirconium site and a bidentate complex on the phosphate site. The fourth part of the research reports on the stability of phosphate and hydrogenphosphate to gamma radiation, with doses of: 10, 30 and 50 MGy. The NZP irradiated at 50 MGy showed very slight changes in their morphology, which changed to hexagonal sheets to cubic form; heating the irradiated NZP regenerates the original morphology. The irradiated TZP-Na showed changes in its crystalline structure but without becoming amorphous, however it maintained its chemical and morphology structure. In conclusion, both phosphates, NaZr2(PO4) and τ-Zr(Na0.06H0.94PO4)2, may be considered for sorption of lanthanides in the barriers, even though the NZP is more resistant to radiation. (Author)

  9. Optically stimulated luminescence dosimeter based on CaS:Eu,Sm

    Institute of Scientific and Technical Information of China (English)

    LIU Yanping; CHEN Zhaoyang; BA Weizhen; FAN Yanwei; GUO Qi; YU Xuefeng; CHANG Aiming; LU Wu; DU Yanzhao

    2008-01-01

    Alkaline earth sulfides (MgS, CaS and BaS) crystal doped with rare-earth ions is an optically stimulated luminescence dosimeter with very high sensitivity, short time constant of the optically stimulated luminescence (OSL)separated perfectly from the stimulation. In this paper, an OSL dosimeter is described. It has linear dose response from 0.01 to 1000 Gy. The equipment, relatively simple and small in size is promising for applications in space exploration and for high dose irradiation and dangerous irradiation conditions.

  10. New states in SmS

    International Nuclear Information System (INIS)

    Quasihydrostatic pressure resistivity experiments on a single crystal of SmS are reported up to 27.5 kbar. At low temperature, a regime change occurs at P approximately 20 kbar, between a ''quasiinsulating'' behavior (P 20 kbar). Striking similarities appear with TmSe and TmS cases. (author)

  11. SmAHTR-CTC Neutronic Design

    Energy Technology Data Exchange (ETDEWEB)

    Ilas, Dan [ORNL; Holcomb, David Eugene [ORNL; Gehin, Jess C [ORNL

    2014-01-01

    Building on prior experience for the 2010 initial SmAHTR neutronic design and on 2012 neutronic design for the advanced high temperature reactor (AHTR), this paper presents the main results of the neutronic design effort for the newly re-purposed SmAHTR-CTC reactor concept. The results are obtained based on full-core simulations performed with SCALE6.1. The dimensionality of the SmAHTR design space is reduced by using constraints originating in material fabricability, fuel licensing, molten salt chemistry, thermal-hydraulic and mechanical considerations. The new design represents in many regards a substantial improvement from the neutronic performance standpoint over the 2010 SmAHTR concept. Among other results, it is shown that fuel cycle length of over 2 years or discharged fuel burnup of 40GWd/MTHM are possible with a low, 8% fuel enrichment in a once-through fuel cycle, while 8-year once-through fuel cycle lengths are possible at higher fuel enrichments.

  12. Preparation and quality control of {sup 153}Sm radiopharmaceuticals

    Energy Technology Data Exchange (ETDEWEB)

    Swasono, R. Tamat; Widyastuti, W.; Purwadi, B.; Laksmi, I. [Radioisotope Production Center - BATAN, Jakarta (Indonesia)

    1998-10-01

    The paper summarizes the preparation and quality control of {sup 153}Sm-EDTMP and three {sup 153}Sm-radiosynovectomy agents. Natural and enriched Sm{sub 2}O{sub 3} (98.7% {sup 152}Sm) irradiated in RSG-GAS 30 MW reactor yielded pure and high specific activity {sup 153}Sm. Labeling of EDTMP with {sup 153}Sm was carried out by mixing {sup 153}SmCl{sub 3} solution of pH 4.0 to an EDTMP solution at room temperature then pH adjustment to 8. The {sup 153}Sm-EDTMP complex was separated from the free {sup 153}Sm{sup +3} on a Chelex 100 column. Radiochemical purity was determined by thin layer chromatography using Cellulose sheets and pyridine: ethanol: water (1: 2: 4) mixture as solvent. The {sup 153}Sm-EDTMP has been shown to be stable for two weeks. Three particulate preparations of {sup 153}Sm used for the irradiation of chronic synovitis have been studied. They are hydroxyapatite particles, human serum albumin microspheres and ferric hydroxide macroaggregates. The {sup 153}Sm-ferric hydroxide macroaggregates were prepared in a single step by coprecipitation of {sup 153}Sm in the formation of Fe(OH){sub 3}. Preparation of {sup 153}Sm-labelled hydroxyapatite particles and {sup 153}Sm-labelled albumin microspheres were carried out by {sup 153}Sm labelling of previously prepared particles. Radiolabelling efficiency were greater than 95% for hydroxyapatite particles and macroaggregates and was lower than 20% for albumin microspheres. The particle sizes were inspected using an optical microscope with a haemocytometer and micrometric ocular. (author)

  13. Intermediate valent metallic SmS and SmSe: a new puzzle

    International Nuclear Information System (INIS)

    It has been discovered that the R-T characteristic of so-called metallic SmS decreases with decreasing T at low temperatures for pressures exceeding approximately equal to kbar. This feature is reminiscent of a metal and in sharp contrast to the previously reported negative temperature coefficient at 10 and 20 kbar. The same fundamental change of the R-T dependence occurs in SmSe at approximately equal to 100 kbar. (author)

  14. Diagnostic significance of Schistosoma mansoni proteins Sm31 and Sm32 in human schistosomiasis in an endemic area in Egypt.

    Science.gov (United States)

    El-Sayed, L H; Ghoneim, H; Demian, S R; El-Sayed, M H; Tawfik, N M; Sakr, I; Abou-Basha, L M; Renganathan, E; Klinkert, M Q; Abou-Rawash, N

    1998-09-01

    We performed a series of ELISAs to evaluate the diagnostic significance of two Schistosoma mansoni proteins, Sm31 (cysteine proteinase, cathepsin B) and Sm32 (asparaginyl endopeptidase). Our study populations were chosen from two villages in an endemic area close to Alexandria. Using fusion proteins MS2-Sm31 and MS2-Sm32 as antigens, 70% and 78.9%, respectively, of patient sera from 134 parasitologically confirmed cases reacted positively. The percentage of seropositivity increased to 84.5% when parasite-derived proteins Sm31 and Sm32 were used. The serum levels of antibodies to these two proteins in recombinant or native forms do not correlate with intensity of infection and hence are detected even when egg counts are low, which makes proteins Sm31 and Sm32 useful antigens in the identification of S. mansoni infected cases, particularly in endemic areas in Egypt. PMID:9754667

  15. Evaluation of SmCo and SmCoN magnetron sputtering coatings for SOFC interconnect applications

    Science.gov (United States)

    Wu, Junwei; Li, Chengming; Johnson, Christopher; Liu, Xingbo

    Cobalt or cobalt containing coatings are promising for SOFC interconnect applications because of their high conductivity. We have investigated SmCo and SmCoN coatings deposited by magnetron sputtering from a SmCo (5% Sm) target on to Crofer 22 APU substrates. The composition, structure, surface morphology, and electrical conductivity of the coated substrates were characterized by SEM/EDX, XRD and ASR measurements. Addition of Sm enhances the oxidation resistance and the Cr retention capability of the coatings. The use of nitride as a precursor stabilizes Sm during oxidation of the films, thus inhibiting diffusion of Fe, resulting in a more compact coating and lowering ASR. The combined advantages of Sm addition to cobalt and the use of a nitride as a precursor, makes SmCoN coatings a promising new interconnect coating material.

  16. Outcomes of 23-gauge pars plana vitrectomy and internal limiting membrane peeling with brilliant blue in macular hole

    Directory of Open Access Journals (Sweden)

    Nohutcu A

    2011-08-01

    Full Text Available Huseyin Sanisoglu1, Mehmet Sahin Sevim1, Betul Aktas1, Semra Sevim2, Ahmet Nohutcu11Haydarpasa Numune Education and Research Hospital, Department of Ophthalmology, 2Uskudar State Hospital, Eye Clinic, Istanbul, TurkeyPurpose: The evaluation of anatomic and visual outcomes in macular hole cases treated with internal limiting membrane (ILM peeling, brilliant blue (BB, and 23-gauge pars plana vitrectomy (PPV.Materials and methods: Fifty eyes of 48 patients who presented between July 2007 and December 2009 with the diagnosis of stage 2, 3, or 4 macular holes according to Gass Classification who had undergone PPV and ILM peeling were included in this study. Pre- and postoperative macular examinations were assessed with spectral-domain optical coherence tomography. 23 G sutureless PPV and ILM peeling with BB was performed on all patients.Results: The mean age of patients was 63.34 ± 9.6 years. Stage 2 macular hole was determined in 17 eyes (34%, stage 3 in 24 eyes (48%, and stage 4 in 9 eyes (18%. The mean follow-up time was 13.6 ± 1.09 months. Anatomic closure was detected in 46/50 eyes (92%, whereas, in four cases, macular hole persisted and a second operation was not required due to subretinal fluid drainage. At follow-up after 2 months, persistant macular hole was detected in one case and it was closed with reoperation. At 12 months, an increase in visual acuity in 41 eyes was observed, while it remained at the same level in six eyes. In three eyes visual acuity decreased. There was a postoperative statistically significant increase in visual acuity in stage 2 and 3 cases (P < 0.05, however, no increase in visual acuity in stage 4 cases was observed.Conclusion: PPV and ILM peeling in stage 2, 3, and 4 macular hole cases provide successful anatomic outcomes, however, in delayed cases, due to photoreceptor loss, it has no effect on functional recovery. BB, used for clarity of ILM, may be beneficial due to its low retinal toxicity.Keywords: macular

  17. EU Smart City Governance

    Directory of Open Access Journals (Sweden)

    Carmela Gargiulo

    2013-11-01

    Full Text Available In recent years European Commission has developed a set of documents for Members States tracing, directly or indirectly, recommendations for the transformation of the European city. The paper wants to outline which future EU draws for the city, through an integrated and contextual reading of addresses and strategies contained in the last documents, a future often suggested as Smart City. Although the three main documents (Cohesion Policy 2014-2020 of European Community, Digital Agenda for Europe and European Urban Agenda face the issue of the future development of European cities from different points of view, which are respectively cohesion social, ICT and urban dimension, each of them pays particular attention to urban and territorial dimension, identified by the name of Smart City. In other words, the paper aims at drawing the scenario of evolution of Smart Cities that can be delineated through the contextual reading of the three documents. To this end, the paper is divided into three parts: the first part briefly describes the general contents of the three European economic plan tools; the second part illustrates the scenarios for the future of the European city contained in each document; the third part seeks to trace the evolution of the Smart Cities issue developed by the set of the three instruments, in order to provide the framework of European Community for the near future of our cities. 

  18. EU Competition Policy Since 1990

    DEFF Research Database (Denmark)

    Bartalevich, Dzmitry

    2013-01-01

    In spite of the evidence of strong influence on the incorporation of policy provisions from the U.S. antitrust into the recent competition policy reforms in the European Union (EU), few considerable attempts have been made to analyze the influence of U.S. antitrust on EU competition policy in...... anticartel enforcement policies, antimonopoly regulation, and the regulation of mergers and acquisitions. The purpose of this article is to fill the gap by attempting to link EU competition policy with U.S. antitrust, provide a critical overview of the most important elements of European competition policy...... reforms, carry out a comparative analysis between EU and U.S. competition policies, detect convergence or divergence, and account for the degree of convergence and for the relevant mechanisms triggering convergence. The main focus is on the analysis of anticartel enforcement policy, antimonopoly policy...

  19. GENERAL OVERWIEV ON EU ECONOMY

    Directory of Open Access Journals (Sweden)

    NICOLETA GEORGETA PANAIT

    2013-05-01

    Full Text Available The impact of the international economic crisis on new EU member states has proven to be more severe than the first estimates of the economic analysts. The situation is different for each Member State, the nature and the dimension of the challenges faced are not identical, and the pace of reform is not the same. The economic crisis has prompted intense and sustained action by the EU's national governments, the European Central Bank and the Commission. All have been working closely together to support growth and employment, ensure financial stability, and put in place a better governance system for the future. Sustainable development in the future is the common responsibility of all Member States and EU institutions, because our economies are closely interlinked, and the EU economic governance now reconfigured to provide more effective responses at the policy level, to give a good reaction to the present and the future challenges.

  20. Implications of EU Emission Trading Scheme for Competition Between EU and Non-EU Airlines

    International Nuclear Information System (INIS)

    MVA Consultancy and CE Delft have been commissioned by DGTL to examine whether, in the event of the Emission Trading Scheme (ETS) being applied to civil aviation flights departing from and arriving at EU airports, there might be appreciable opportunity for non-EU carriers to strengthen their competitive position vis a vis EU airlines. Though separately contracted to DGTL, the two consultancies were requested to collaborate in seeking a common view on this matter. This report summarises the joint findings of the consultancies

  1. Japanese firms in the EU.

    OpenAIRE

    Hamada, Y.

    2008-01-01

    The number of Japanese firms in Brussels has increased since the creation of the European Single Market. At the same time, large European firms have become independent political actors and harmonized their lobbying pattern, creating a distinctive business-government relationship in the EU. Yet, it still remains to be examined whether Japanese firms are able to utilize their political options and conform to the new EU lobbying style, which features firms' direct participation within the policy...

  2. SOCIAL ENTREPRENEURSHIP IN EU REGION

    OpenAIRE

    Iuliu Marin IVANESCU; Camelia M. Gheorghe; SZTRUTEN (LEFTER) Gina Gilet

    2013-01-01

    Social entrepreneurship has recently received greater recognition from the public sector, as well as from scholars. Whereas a dozen years ago the concept of social enterprise was rarely discussed, it is now making amazing breakthroughs on both sides of the Atlantic, especially in EU countries and the United States. In order to promote a competitive social market economy, the Commission has placed the social economy and social innovation at the heart of its concerns. The EU's new social-entrep...

  3. Forum "Convergence in the EU"

    OpenAIRE

    Hefeker, Carsten; Torres, Francisco S; Bongardt, Annette; WUNSCH, Pierre; Hermann, Christoph

    2013-01-01

    The EU has long viewed economic and institutional convergence as important goals, but the results thus far have been decidedly mixed, and there remain several open questions: How exactly should convergence be defined? How much convergence is necessary? What steps can be taken to improve convergence in the EU, and how can success be defined? Finally, how much convergence can be achieved by improving the economic performance in underperforming regions, and how can convergence in the form of har...

  4. GENERAL OVERWIEV ON EU ECONOMY

    OpenAIRE

    NICOLETA GEORGETA PANAIT

    2013-01-01

    The impact of the international economic crisis on new EU member states has proven to be more severe than the first estimates of the economic analysts. The situation is different for each Member State, the nature and the dimension of the challenges faced are not identical, and the pace of reform is not the same. The economic crisis has prompted intense and sustained action by the EU's national governments, the European Central Bank and the Commission. All have been working closely together to...

  5. SmS-Ga2S3 system

    International Nuclear Information System (INIS)

    The system SmS-Ga2S3 was studied by physico-chemical methods and diagrams of state drawn up. It was established that the compounds SmGa2S4 and SmGa4S7 were formed in the system. Orthorhombic (a=10.28, b=10.42, c=6.16 A, space group Bmbm) and monoclinic symetries are determined for SmGa2S4 and SmGa4S7 single crystals respectively

  6. China-EU Over Ten Years

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ The 10th China-EU Meeting took place in Beijing on November 28, 2007. This was an important annual meeting held at a critical point in the history of China-EU relations. Since this regularly scheduled meeting was first established in 1998, leaders from both China and the EU have met continuously. Over the past decade, many fundamental changes have taken place between China and the EU, and the China-EU relationship has evolved into full strategic partnership.

  7. Eu2(PO3H)3

    International Nuclear Information System (INIS)

    The structure of dieuropium tris(hydrogen phosphite), Eu2(PO3H)3, contains three independent phosphite anions. One Eu3+ cation is eight-coordinate whereas the other is only seven-coordinate. One [EuO8] dodecahedron and one monocapped [EuO7] trigonal prism alternate so that, by sharing one vertex, infinite layers are formed parallel to the [101] direction. The layers are held together by Eu-O interlayer bonds. (orig.)

  8. New CNT/poly(brilliant green) and CNT/poly(3,4-ethylenedioxythiophene) based electrochemical enzyme biosensors.

    Science.gov (United States)

    Barsan, Madalina M; Pifferi, Valentina; Falciola, Luigi; Brett, Christopher M A

    2016-07-13

    A combination of the electroactive polymer poly(brilliant green) (PBG) or conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) with carbon nanotubes to obtain CNT/PBG and CNT/PEDOT modified carbon film electrodes (CFE) has been investigated as a new biosensor platform, incorporating the enzymes glucose oxidase (GOx) as test enzyme, alcohol oxidase (AlcOx) or alcohol dehydrogenase (AlcDH). The sensing parameters were optimized for all biosensors based on CNT/PBG/CFE, CNT/PEDOT/CFE platforms. Under optimized conditions, both GOx biosensors exhibited very similar sensitivities, while in the case of AlcOx and AlcDH biosensors, AlcOx/CNT/PBG/CFE was found to give a higher sensitivity and lower detection limit. The influence of dissolved O2 on oxidase-biosensor performance was investigated and was shown to be different for each enzyme. Comparisons were made with similar reported biosensors, showing the advantages of the new biosensors, and excellent selectivity against potential interferents was successfully demonstrated. Finally, alcohol biosensors were successfully used for the determination of ethanol in alcoholic beverages. PMID:27237835

  9. Heterogeneous photo-Fenton photodegradation of reactive brilliant orange X-GN over iron-pillared montmorillonite under visible irradiation

    International Nuclear Information System (INIS)

    Decolorization and mineralization of reactive brilliant orange X-GN was investigated under visible light irradiation (λ ≥ 420 nm) by using Fe-Mt/H2O2 as the heterogeneous photo-Fenton reagent. The characterization results (XRD, FTIR, XRF, BET, XPS, UV-vis diffuse spectra) of Fe-Mt suggested that small-sized hydrolyzed iron successfully intercalated into the interlayer spaces of the clay via pillaring. The stability of the Fe-Mt catalyst was evaluated according to the decolorization efficiency for X-GN with used catalyst from previous runs and the concentration of iron ions leached from the solid structure into the reaction solution. The catalytic results showed that at a reaction temperature of 30 deg. C, pH 3.0, 4.9 mmol/L H2O2 and 0.6 g/L catalyst dosage, 98.6% discoloration and 52.9% TOC removal of X-GN were achieved under visible irradiation after 140 min treatment. Furthermore, the maximum concentration of dissolved iron ions was 1.26% of the total iron content in the Fe-Mt catalyst after photocatalysis. A halogen lamp as light source has demonstrated that visible radiation can be successfully used for a heterogeneous photo-Fenton process.

  10. Enhanced photocatalytic-electrolytic degradation of Reactive Brilliant Red X-3B in the presence of water jet cavitation.

    Science.gov (United States)

    Wang, Xiaoning; Jia, Jinping; Wang, Yalin

    2015-03-01

    Photocatalysis, electrolysis, water jet cavitation (WJC), alone and in combinations were applied to degrade an azo dye, Reactive Brilliant Red X-3B (X-3B). Experiments were conducted in a 4.0 L aqueous solution with different initial dye concentrations, TiO₂ dose, and solution pH. WJC substantially increased the photocatalytic, electrolytic and photocatalytic-electrolytic rates of the dye removal. The observed first-order rate of X-3B decolorization in the process of combined photocatalysis and electrolysis coupled with WJC was 1.6-2.9 times of that in the process of combined photocatalysis and electrolysis coupled with mechanical stirring. The rate enhancements may be attributed primarily to the reduced diffusion layer thickness on the electrodes and the deagglomeration of photocatalyst particles due to the chemical and physical effects of WJC. Under the conditions of 80 mg/L X-3B solution, 100 mg/L TiO₂ dose and solution pH 6.3, 97% and 71% of color and chemical oxygen demand (CODCr) were removed, respectively, within 90-min photocatalytic-electrolytic treatment coupled with WJC. During this process, azo groups and naphthalene, benzene and triazine structures of the dye can be destroyed. Industrial textile effluent was also investigated, and a positive synergistic effect between photocatalytic-electrolytic system and WJC was observed considering color removal. PMID:25453209

  11. Removal of the synthetic dye Remazol Brilliant Blue R from textile industry wastewaters by biosorption on the macrophyte Salvinia natans

    Directory of Open Access Journals (Sweden)

    B. T. Pelosi

    2014-12-01

    Full Text Available Batch experiments were carried out for biosorption of Remazol Brilliant Blue R dye onto the macrophyte Salvinia natans. Effects of parameters such as initial dye concentration, pH, biosorbent dosage, contact time and temperature were investigated. Chemical and morphological characteristics of the biosorbent were evaluated before and after the biosorption process using methods such as Optical Microscopy (OM, Scanning Electron Microscopy (SEM, Thermogravimetric Analysis (TA, Differential Scanning Calorimetry (DSC and Infrared Spectroscopy (FT-IR. Sorption kinetics were conducted and followed a pseudo-second order kinetic model. Equilibrium data were well represented by the Langmuir model. Salvinia natans exhibited a maximum uptake of 61.9 mg.g-1. The Dubinin-Radushkevich model indicated that the adsorption takes place by a physical process. Thermodynamic parameters were estimated. The negative values of the Gibbs energy indicated the spontaneous nature of the adsorption. The entropy was positive and the positive value of the enthalpy showed that the process is endothermic.

  12. Chemical and structural evaluation of activated carbon prepared from jute sticks for Brilliant Green dye removal from aqueous solution.

    Science.gov (United States)

    Asadullah, Mohammad; Asaduzzaman, Mohammad; Kabir, Mohammad Shajahan; Mostofa, Mohammad Golam; Miyazawa, Tomohisa

    2010-02-15

    Activated carbons have been prepared from jute sticks by chemical activation using ZnCl(2) and physical activation using steam for the removal of Brilliant Green dye from aqueous solution. The activated carbons and charcoal prepared from jute sticks were characterized by evaluating the surface chemistry, structural features and surface morphology. The maximum BET surface area was obtained to be 2304 m(2)/g for chemical activated carbon (ACC) while it is 730 and 80 m(2)/g for steam activated carbon (ACS) and charcoal, respectively. The FT-IR spectra exhibited that the pyrolysis and steam activation of jute sticks resulted in the release of aliphatic and O-containing functional groups by thermal effect. However, the release of functional groups is the effect of chemical reaction in the ZnCl(2) activation process. A honeycomb-type carbon structure in ACC was formed as observed on SEM images. Although charcoal and ACC were prepared at 500 degrees C the ACC exhibited much lower Raman sensitivity due to the formation of condensed aromatic ring systems. Due to high surface area and high porous structure with abundance of functional groups, the ACC adsorbed dye molecules with much higher efficiency than those of ACS and charcoal. PMID:19815339

  13. Effect of Activation Time on the Pinang Frond based Activated Carbon for Remazol Brilliant Blue R Removal

    Directory of Open Access Journals (Sweden)

    M.A. Ahmad

    2014-12-01

    Full Text Available Activated carbons are regularly used for dye wastewater treatment. They can be produced from various organic materials which have a high level of carbon content. In this study, Pinang frond based activated carbon (PFAC was produced by using a physical activation process to study the effect of different activation times in the range of 1–7 hours. The optimum PFAC sample was found with an activation time of 3 hours, which gives the highest BET surface area and pore volume of 958.23 m2/g and 0.5469 mL/g, respectively. This sample shows well-developed pore structure with a high fixed carbon content of 79.74%. The removal of 87.6% of Remazol Brilliant Blue R (RBBR was achieved for a sample with initial RBBR concentration of 50 mg/L, and 40.8% was achieved with 500 mg/L. The results indicated that the PFAC is very effective for RBBR adsorption from aqueous solutio

  14. Octupole collectivity in the Sm isotopes

    International Nuclear Information System (INIS)

    Microscopic models suggest the occurrence of strong octupole correlations in nuclei with N≅88. To examine the signatures of octupole correlations in this region, the spdf interacting boson approximation model is applied to Sm isotopes with N=86-92. The effects of including multiple negative-parity bosons in this basis are compared with more standard one negative-parity boson calculations and are analyzed in terms of signatures for strong octupole correlations. It is found that multiple negative-parity bosons are needed to describe properties at medium spin. Bands with strong octupole correlations (multiple negative-parity bosons) become yrast at medium spin in 148,150Sm. This region shares some similarities with the light actinides, where strong octupole correlations were also found at medium spin

  15. Chemical Modification of Oryza sativa Linnaeus Husk with Urea for Removal of Brilliant Vital Red and Murexide Dyes from Water by Adsorption in Environmentally Benign Way

    International Nuclear Information System (INIS)

    Oryza sativa Linnaeus is an important food item all around the world. Due to its huge consumption, a large amount of rice husk is generated as agrowaste which can be used for water treatment by adsorption. Its adsorption capacity further can be enhanced by chemical medication. In the present study, urea modified rice husk has been used for removing Brilliant Vital Red and Murexide form water in an efficient way. After optimizing operating conditions, isothermal and thermodynamical studies were carried out, which showed that maximum adsorption capacity of urea modified rice husk for removing Brilliant Vital Red and Murexide dyes were 28.93 and 30.74 mg.g/sup -1/. Adsorbent characterization was carried out by recording its FT-IR spectra. (author)

  16. Transport properties of golden SmS

    International Nuclear Information System (INIS)

    We report electrical resistivity and Hall effect measurements on golden SmS up to a pressure of P∼26kbar. The Hall coefficient at a low temperature shows a drastic decrease above about 13 kbar as a function of P, and a change in sign at a critical pressure Pc2 above which an antiferromagnetically ordered phase appears. We construct a P-T phase diagram from the transport properties together with previously reported results of the ac magnetic susceptibility

  17. Instability of SmS under pressure

    International Nuclear Information System (INIS)

    It is suggested that electron-phonon (EP) interaction is a suitable mechanism to explain the instability of the semiconducting phase in SmS under pressure. The f reversible d and d reversible d scattering processes due to EP interaction avoid the introduction of negative renormalized f-d hybridization assumed by some other models as the source of the first order instability. Moreover this instability is shown as occuring for a non-zero energy gap. (orig.)

  18. The SM-200 step motor control device

    International Nuclear Information System (INIS)

    One of the main nodes of the stand for testing and modeling solenoid coils, which define the focus of the beam of charged particles in the accelerator LUE-200 (IREN), is a device for positioning Hall sensors (HS). The mechanism of movement of the platform where HS are installed is activated by the step motor. This paper describes the control device of the step motor SM-200

  19. Energy levels of Sm2+ excited state

    International Nuclear Information System (INIS)

    The energy levels of excited configurations 4f5u'l' of Sm2+ calculated in detail by using unitary group approach are covered. The energy expressions with slater integral as parameters are given and the spin-orbit coupling is considered according to the Russell-Saunders approximation. The coupling parameters λ of the main energy levels are also calculated in the paper

  20. X(5 Symmetry to 152Sm

    Directory of Open Access Journals (Sweden)

    Eid S. A.

    2016-07-01

    Full Text Available The excited positive and negative parity states, potential energy surfaces, V ( ; , electromagnetic transition probabilities, B ( E 1, B ( E 2, electric monopole strength X ( E 0 = E 2 and staggering e ect, I = 1, were calculated successfully using the inter- acting boson approximation model IBA -1. The calculated values are compared to the available experimental data and show reasonable agreement. The energy ratios and contour plot of the potential energy surfaces show that 152 Sm is an X (5 candidate.

  1. Metal Atom Dynamics in Superbulky Metallocenes : A Comparison of (Cp-BIG)(2)Sn and (Cp-BIG)(2)Eu

    NARCIS (Netherlands)

    Harder, Sjoerd; Naglav, Dominik; Schwerdtfeger, Peter; Nowik, Israel; Herber, Rolfe H.

    2014-01-01

    (Cp2Sn)-Sn-BIG (Cp-BIG = (4-n-Bu-C6H4)(5)cyclopentadienyl), prepared by reaction of 2 equiv of (CpNa)-Na-BIG with SnCl2, crystallized isomorphous to other known metallocenes with this ligand (Ca, Sr, Ba, Sm, Eu, Yb). Similarly, it shows perfect linearity, C-H center dot center dot center dot C(pi) b

  2. Lifetime measurement for the 21+ state in 140Sm and the onset of collectivity in neutron-deficient Sm isotopes

    Science.gov (United States)

    Bello Garrote, F. L.; Görgen, A.; Mierzejewski, J.; Mihai, C.; Delaroche, J. P.; Girod, M.; Libert, J.; Sahin, E.; Srebrny, J.; Abraham, T.; Eriksen, T. K.; Giacoppo, F.; Hagen, T. W.; Kisielinski, M.; Klintefjord, M.; Komorowska, M.; Kowalczyk, M.; Larsen, A. C.; Marchlewski, T.; Mitu, I. O.; Pascu, S.; Siem, S.; Stolarz, A.; Tornyi, T. G.

    2015-08-01

    Background: The chain of Sm isotopes exhibits a wide range of nuclear shapes and collective behavior. While the onset of deformation for N >82 has been well studied both experimentally and theoretically, fundamental data is lacking for some Sm isotopes with N Weisskopf units. The theoretical calculations are in very good agreement with the experimental result. Conclusions: The B (E 2 ;21+→01+) value for 140Sm fits smoothly into the systematic trend for the chain of Sm isotopes. The new beyond-mean field calculations are able to correctly describe the onset of collectivity in the Sm isotopes below the N =82 shell closure for the first time.

  3. The WWR-SM-20 research reactor

    International Nuclear Information System (INIS)

    In this paper the design features and experimental capabilities of the WWR-SM-20 research reactor are described. The reactor uses fuel assemblies consisting of six coaxial fuel tubes with a square cross-section. IRT-3M fuel assemblies can be used with both 90% enriched and 36% enriched uranium. The main characteristics of the IRT-3M fuel assemblies are given, as are the technical and physical parameters of the WWR-SM-20 reactor. The core can hold up to ten ampoule-type channels with a diameter of up to 68 mm. For irradiation purposes, up to 22 26-mm-diameter channels in the fuel assemblies, and up to 48 42-mm-diameter channels in the beryllium blocks of the reflector can be used. In the graphite blanket between the horizontal channels, channels with a diameter of up to 130 mm can be used. The thermal neutron flux density has a maximum value of 1.5 X 1018 m-2 · s-1 in the core and 2.3 X 1018 m-2 · s-1 in the reflector, and the fast neutron flux density (cE > 0.821 MeV) a maximum of 1.9 X 1018 m-2 · s-1. A number of design features have been incorporated in the WWR-SM-20 reactor to make it effectively safe

  4. The Naturalness of the Fourth SM Family

    CERN Document Server

    Sultansoy, S

    2009-01-01

    The necessity of the fourth family follows from the SM basics. According to flavor democracy the Dirac masses of the fourth SM family fermions are almost equal with preferable value 450 GeV, which corresponds to common (for all fundamental fermions) Yukawa coupling equal to SU(2) gauge coupling gW. In principle, one expect u4 a little bit lighter than d4, while nu4 could be essentially lighter than l4 due to Majorana mass terms for right-handed components of neutrinos. Obviously, the fourth family quarks will be copiously produced at the LHC. However, the first indication of the fourth SM family may be provided by early Higgs boson observation due to almost an order enhancement of the gluon fusion to Higgs cross-section. For the same reason the Tevatron still has a chance to observe the Higgs boson before the LHC. Concerning the fourth family leptons, in general, best place will be NLC/CLIC. However, for some mass regions and MNS matrix elements double discovery of both the nu4 and H could be possible at the ...

  5. Heterogeneous fenton-like degradation of an azo dye reactive brilliant orange by the combination of activated carbon-FeOOH catalyst and H 2O2

    DEFF Research Database (Denmark)

    Wu, Jinhua; Lin, Guanghui; Li, Ping;

    2013-01-01

    The decoloration of an azo dye reactive brilliant orange (X-GN) by a heterogeneous Fenton system using activated carbon-FeOOH catalyst (AC-FeOOH) and H2O2 was studied. Under typical conditions (pH 7.0, H2O2 10 mmol/L, AC-FeOOH 1.0g/L and 30°C), 98% decoloration rate of X-GN was achieved in 240 mm...

  6. Poly(brilliant green) and poly(thionine) modified carbon nanotube coated carbon film electrodes for glucose and uric acid biosensors

    OpenAIRE

    Ghica, M. Emilia; Christopher M. A. Brett

    2014-01-01

    Poly(brilliant green) (PBG) and poly(thionine) (PTH) films have been formed on carbon film electrodes (CFEs) modified with carbon nanotubes (CNT) by electropolymerisation using potential cycling. Voltammetric and electrochemical impedance characterisation were performed. Glucose oxidase and uricase, as model enzymes, were immobilised on top of PBG/CNT/CFE and PTH/CNT/CFE for glucose and uric acid (UA) biosensing. Amperometric determination of glucose and UA was carried out in phosphate buffer...

  7. Application of the collective model to determine the rotation bands and vibrational bands of 152Sm and 152Gd nucleus

    International Nuclear Information System (INIS)

    The research of nuclear reactions is necessary to identify the specific characteristics of nucleus and it is the most effective experimental method up to now. However, in order to explain the properties of nuclear structures, in addition to the study of the nuclear reactions, nuclear structure models to explain experimental dat and its theory must be used. There are many nuclear structure models to solve those properties of nucleus. This paper presents a collective model application to identify some of rotational bands and vibrational bands of 152 Sm and 152Gd nucleus which result from beta decay of 152Eu source the. (author)

  8. Direct synthesis of mesoporous molecular sieves of Ni-SBA-16 by internal pH adjustment method and its performance for adsorption of toxic Brilliant Green dye

    Directory of Open Access Journals (Sweden)

    Asma Tufail Shah

    2015-07-01

    Full Text Available An ordered mesoporous novel material Ni-SBA-16 has been synthesized by internal pH-adjustment method. The synthesized material has been characterized by small angle XRD (SXRD, wide angle XRD (WXRD, Scanning Electron Microscope (SEM, High-Resolution Transmission Electron Microscope (HRTEM, Fourier-transform Infra-red (FTIR spectroscope and Nitrogen Adsorption desorption techniques. The characterization results have shown that material possesses highly ordered mesostructure with high surface area (736 m2/g and large pore diameter (3.8 nm. FTIR and WXRD spectra revealed that nickel was uniformly dispersed on SBA-16 surface. The synthesized material has been used as adsorbent for removal of toxic Brilliant Green dye due to its large surface area and pore size. At optimized conditions, almost 100% of Brilliant Green dye was removed from aqueous solution by Ni-SBA-16. The isotherms analysis indicates that the Langmuir and Hill models provide the best correlation of the experimental data. The maximum adsorption capacity (qmax of Ni-SBA-16 for Brilliant Green dye was 322.58 mg/g.

  9. Influence of operating conditions on the removal of brilliant vital red dye from aqueous media by bio-sorption using rice husk

    International Nuclear Information System (INIS)

    Bio-sorption is emerging as an economical and eco friendly methodology for the removal of hazardous and toxic chemicals from waste water. The operating conditions have a great influence on the efficiency of this process. Conventional and indigenous bio sorbents like bagasse, wheat husk and rice husk have been evaluated for their removing efficiency of Brilliant Vital Red dye from water. Rice husk is proved better among them. The effect of important operating conditions for the removal of the dye using rice husk were studied. The observed optimum values for various factors are; 0.2 g of bio sorbent, 25 ppm initial dye concentration, 30 deg. C temperature, 15 minutes contact time, 300 rpm stirring speed and 2.0 ph. Langmuir adsorption isotherm model was also applied to evaluate maximum adsorption capacity of rice husk for Brilliant Vital Red dye. Q/sub max/ value was 15.06 which indicated that rice husk can effectively be used for the removal of Brilliant Vital Red dye from wastewater using the optimized operational conditions. This study would be accommodative with regard to practical wastewater treatment. (author)

  10. Evropská směrnice INSPIRE

    Directory of Open Access Journals (Sweden)

    Pavla Tryhubová

    2006-12-01

    Full Text Available Článek byl vytvořen na základě informací ze semináře a workshopu organizovaného sdružením Nemoforum spolu se Společným výzkumným centrem Evropské komise (EC Joint Research Centre - Ispra, Itálie a CENIA, českou agenturou pro životní prostředí. Tématem semináře a workshopu byla Geoinformační infrastruktura ČR a INSPIRE.Česká republika vstoupila do Evropské unie (EU spolu s dalšími devíti státy 1. května 2004. Změny na trhu s geodaty uvnitř Evropské unie se dotýkají i České republiky. Hlavním ohniskem těchto změn je iniciativa INSPIRE. INSPIRE by se měla stát evropskou směrnicí v roce 2007. INSPIRE podporuje harmonizaci prostorových formátů dat, dostupnost datových sad a schopnost vyhledat různé datové sady. V první části článku je shrnut poslední vývoj uvnitř iniciativy INSPIRE a v druhé části jsou zveřejněny závěry zmiňovaného semináře a workshopu.

  11. EU Climate Change Exhibition Held

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    <正>On April 25, the CPAFFC, the China-EU Association (CEUA) and the Delegation of the European Commission to China jointly held the opening ceremony for the EU Exhibition on Climate Change in the CPAFFC. He Luli, former vice chairperson of the NPC Standing Committee and honorary president of the CEUA, Jose Manuel Barroso, president of the European Commission, and Li Jianping, vice president of the CPAFFC, attended the opening ceremony and made speeches. Honorary President He Luli highly praised the achievements made by China and the EU in their longtime cooperation of mutual benefits in various fields including environmental protection. She said, for many years China and EU have both committed to the development of all-round strategic partnership and establishment of a multi-level mechanism of political dialogue. She expressed, with increasing enthusiasm the CEUA would continue to actively carry out nongovernmental exchanges between China and the EU, and promote cooperation between the two sides in the fields of economy, society, environmental protection, science and technology, culture, etc.

  12. On the microstructure of Sm Co5 magnets

    International Nuclear Information System (INIS)

    Sm Co5-based magnet microstructure is more complex than might be expected from the binary Sm-Co phase diagram, as other elements like oxygen and carbon intervene and as local heterogeneities occur due to the powder metallurgy method of production. This paper investigates the effect of sintering temperature, samarium and oxygen content on this microstructure and properties. Six constituents were found: Sm Co5, Sm2 Co7, oxides pores and the carbide Sm Co C2 are found in high coercivity magnets, whereas Sm2 Co17 is found in low coercivity magnets. A samarium-depleted surface region is always present and eventually large Co-rich particles occur. A microstructural modeling based on the magnetic density, samarium, oxygen and carbon content was able to predict the Sm2 Co7 volume fraction of magnets. The model permits the calculation of the necessary amount of Sm-rich additive to obtain high coercivity. The presence of Sm2 Co7 in the microstructure is not detrimental to high coercivity and high Hk, as Hk=12 kOe was obtained in samples with 7% volume fraction of Sm2 Co7. The effect to heat-treatment on coercivity is reversible: resintering with no heat-treatment lowers coercivity. As an oxygen solubility change was not found between 1150 and 850 deg C, it cannot be the cause of coercivity improvement due to heat-treatment. (author)

  13. Interaction Study of Certain Dyes like Ferric oxide Red, Brilliant Blue and Soy Food Stuffs with Statins and Its Influence on Protein Binding and Intrinsic Association Constant ‘K’ of Statins

    OpenAIRE

    Vijayaraj S; Bagyalakshmi J; Ravi TK

    2010-01-01

    Interaction of Atorvastatin, Simvastatin and Rosuvastatin with dyes like ferric oxide red, brilliant blue and soy food stuffs were carried out in BSA using RP-HPLC method. Developed method was validated as per ICH Guidelines. Protein binding and Intrinsic association constant ‘K’ of statin drugs were calculated in presence of dyes and food stuffs. The order of interaction in Atorvastatin, Simvastatin and Rosuvastatin were found to be ferric oxide > soy food stuffs > brilliant blue; Soy food s...

  14. 2005 EU-25 electricity statistics

    International Nuclear Information System (INIS)

    In 2005, electricity generation in the U-25 decreased by 0.2% over the level of 2004. Also for the EU-15, a decrease by 0.2% can be recorded. Eleven member countries report increases in electricity generation. In 3 countries, the level remained constant, while also 11 countries show a decline. Conventional thermal power plants generated 1,685.2 billion kWh, which corresponds to 55.8% of the aggregate production. Generation in nuclear power plants was 923.8 billion kWh, which corresponds to a 30.6% share in EU-wide generation. Hydroelectric plants and other facilities supplied 412.3 billion kWh. Its share is 13.7%. (Differences possible due to round up/down.) In most EU candidate countries, electricity generation showed a steep rise. (orig.)

  15. Coping with EU environmental legislation

    DEFF Research Database (Denmark)

    Anker, Helle Tegner; de Graaf, Kars; Purdy, Ray;

    2015-01-01

    A ‘burden reducing’ agenda has spurred an increased interest in how EU environmental legislation is transposed into national legislation—most prominently reflected in the principle of ‘no gold-plating’. Yet, an important question is to what extent transposition principles and practices may ensure a...... coherent and accessible body of environmental legislation, while at the same time ensuring adequate transposition of EU environmental legislation. This article analyses the existence, or emergence, of transposition principles and practices in three Member States—the United Kingdom, the Netherlands and...... Denmark. It also examines how EU initiatives may influence these principles and practices. The article concludes that the steering of transposition processes by general transposition principles and objectives alone, and in particular those dominated by a ‘burden reducing’ agenda, has a limited focus on...

  16. EU Lobbying and Anti-Dumping Policy

    DEFF Research Database (Denmark)

    Nielsen, Jørgen Ulff-Møller; Svendsen, Gert Tinggaard

    2012-01-01

    Lobbying in the EU is difficult to measure. It varies in intensity and modes of expression across different policy areas and EU countries. By looking at a specific EU policy area this paper suggests to measure differences in the lobbying activity across EU countries by the combination...... of petitioning firms and Council voting in the case of anti-dumping policy. If the political position of countries in anti-dumping cases is influenced by domestic lobbying efforts, we expect that the empirical pattern of country distribution of petitioning firms in EU anti-dumping cases corresponds closely...... position of countries in the special case of EU anti-dumping policy....

  17. Selection of oocytes for in vitro maturation by brilliant cresyl blue staining: a study using the mouse model

    Institute of Scientific and Technical Information of China (English)

    Yan-Guang Wu; Yong Liu; Ping Zhou; Guo-Cheng Lan; Dong Han; De-Qiang Miao; Jing-He Tan

    2007-01-01

    Selecting oocytes that are most likely to develop is crucial for in vitro fertilization and animal cloning. Brilliant cresyl blue (BCB) staining has been used for oocyte selection in large animals, but its wider utility needs further evaluation. Mouse oocytes were divided into those stained (BCB+) and those unstained (BCB-) according to their ooplasm BCB coloration. Chromatin configurations, cumulus cell apoptosis, cytoplasmic maturity and developmental competence were compared between the BCB+ and BCB- oocytes. The effects of oocyte diameter, sexual maturity and gonadotro-pin stimulation on the competence of BCB+ oocytes were also analyzed. In the large- and medium-size groups, BCB+ oocytes were larger and showed more surrounded nucleoli (SN) chromatin configurations and higher frequencies of early atresia, and they also gained better cytoplasmic maturity (determined as the intracellular GSH level and pattern of mitochondrial distribution) and higher developmental potential after in vitro maturation (IVM) than the BCB- oocytes. Adult mice produced more BCB+ oocytes with higher competence than the prepubertal mice when not primed with PMSG. PMSG priming increased both proportion and developmental potency of BCB+ oocytes. The BCB+ oocytes in the large-size group showed more SN chromatin configurations, better cytoplasmic maturity and higher developmental potential than their counterparts in the medium-size group. It is concluded that BCB staining can be used as an efficient method for oocyte selection, but that the competence of the BCB+ oocytes may vary with oocyte diameter, animal sexual maturity and gonadotropin stimulation. Taken together, the series of criteria described here would allow for better choices in selecting oocytes for better development.

  18. A preliminary study of Heavy Brilliant Blue G for internal limiting membrane staining in macular hole surgery

    Directory of Open Access Journals (Sweden)

    Dhananjay Shukla

    2012-01-01

    Full Text Available Context : Surgical outcomes of vitrectomy for idiopathic macular hole using a "heavy" Brilliant Blue G (HBBG solution for staining and removal of the internal limiting membrane (ILM. Settings and Design : Prospective interventional case series conducted in a tertiary eye care hospital. Materials and Methods : Nineteen patients (20 eyes with idiopathic macular hole were enrolled to undergo vitrectomy with ILM peeling using HBBG. BBG dye was made heavy by mixing with 10% dextrose normal saline (DNS solution in 2:1 ratio. The adequacy of ILM staining was noted intraoperatively. The closure rates of macular hole and visual improvement were recorded. Patients were followed up postoperatively on day 1, week 1, and subsequently at 1, 3, and 6 months, and every 6th month thereafter. Statistical Analysis: Wilcoxon signed-rank test was used; P < 0.05 was considered significant. Results: Preoperative best-corrected visual acuity (BCVA ranged from 20/1000 to 20/63 (median: 20/100. Intraoperatively, the ILM stained very well in all eyes, and was easily removed. All macular holes closed postoperatively. The mean follow-up was 6.15 ± 2 months (range: 4-10; median: 6 months. Final BCVA ranged from 20/20 to 20/80 (median: 20/40, amounting to a significant visual improvement (P = 0.0001. BCVA improved by 1-8 Snellen lines in 19 eyes (95%; 16 eyes (80% improved by ≥2 lines; 13 eyes (65% achieved a final BCVA of 20/40 or better. Conclusions : Addition of 10% DNS to BBG dye allowed good ILM staining with less dye during macular hole surgery, and provided excellent anatomic and visual outcomes.

  19. EU Space Awareness: Initial implemenation

    Science.gov (United States)

    Russo, Pedro

    2015-08-01

    EU Space Awareness uses the excitement of space to attract young people into science and technology and stimulate European and global citizenship. The project will show children and teenagers the opportunities offered by space science and engineering and inspire primary-school children when their curiosity is high and their value systems are being formed. EU Space Awareness, a 3-year project, has started in March 2015 with 10 partner organisations and 15 network nodes in 17 European countries and the IAU Office of Astronomy for Development. During this talk we will give a update about the intial implementation of the project and its relevant for astronomy for development.

  20. Report on EU financial integration

    OpenAIRE

    EFC

    2002-01-01

    Despite progress in implementing the internal market programme and the introduction of the euro, the EU still does not have a fully integrated financial market. Much has been achieved on the road towards integration, but there is more work still to do. The European Council at Lisbon set the key strategic goal for the EU to become by 2010 ‘the most competitive and dynamic knowledge-based economy in the world'. As recognised by Heads of State and Government, a crucial element to achieve this ...

  1. Roadblocks to Turkey's EU Membership

    OpenAIRE

    Berežný, Peter

    2014-01-01

    The bachelor thesis deals with the issue of relations between the EU and Turkey.The thesis was based on the questionnaire which was spread among the younger part of the Turkish population. As the research methods, the source research was used for theoretical part and inductive research for the questionnaire analysis. The first chapter deals with the accession process of the Turkey to the EU and its impact on the opinion of the younger part of the Turkish population. The next chapter concerns ...

  2. Citrate sol gel synthesis, phase formation, optical-properties and TEM analysis of nanocrystalline TaSr2SmCu2O8 materials

    Science.gov (United States)

    Balamurugan, S.; George, Jincymol; Parthiban, P.

    2016-05-01

    We report the citrate sol gel (CSG) derived synthesis of nanocrystalline tantalo-cuprate, TaSr2SmCu2O8 (Ta1212Sm) materials and studied the thermal, phase formation, photoluminescence (PL) and photo-catalytic properties and TEM analysis. Like Ta1212Eu phase, the present Ta1212Sm phase is also successfully crystallized in tetragonal symmetry with lattice parameter, a = 0.3875(1) nm and c = 1.1690(5) nm with average crystalline size of ~61.5 nm upon subsequent annealing of the combustion product at 1100°C for 24 h under O2 atmosphere. The room temperature PL emission spectrum of nanocrystalline Ta1212Sm materials exhibits an emission peak at ~605 nm under excitation wavelength of 404 nm. The photo-degradation (~89 %) of methyl orange (MO) by the Ta1212Sm catalyst in the presence of H2O2 is explored. The TEM micro-images reveal that the particles are in nano-scale and irregular morphology.

  3. ELECTROCHEMICAL BEHAVIOR AND KINETICS OF THE INTERVALENCE CHARGE TRANSFER FOR THE SM(III)/SM(II) REDOX COUPLE IN LiF-CaF2 MELT

    OpenAIRE

    Stulov Yuriy Vyacheslavovich; Korenko Michal; Kubikova Blanca; Kuznetsov Sergey Aleksandrovich

    2015-01-01

    This article is focused on the electrochemical investigation (cyclic voltammetry) of the redox couple Sm(III)/Sm(II) in an eutectic LiF–CaF2 melt containing SmF3. The first step of reduction for Sm(III) ions, involving one electron exchange in soluble/soluble Sm(III)/Sm(II) system, was found on a tungsten electrode. The study of the Sm(II)/Sm(0) electrode reaction was not feasible, since it’s the redox potential is in the same range of the solvent decomposition. The first step was fo...

  4. Preparation of bone tumor therapeutic radiopharmaceuticals 153Sm-EDTMP

    International Nuclear Information System (INIS)

    Samarium-153-EDTMP (ethylene diamine tetramethylene phosphonate), for its promising biological properties, has been proved as a palliating therapeutic agent for bone tumor in human beings. 153Sm with high radionuclear purity and specific activity of 5.18 GBq (140 mCi)/mg Sm2O3 was prepared by irradiating natural Sm2O3(152Sm, 26.7%) sample, replacing costly enriched samarium oxide target, at a flux of 4 x 1013 n·cm-2·s-1 for 110 h. The yield of 153Sm complexing with EDTMP is greater than 98% at pH 8∼10 in boiling water bath for 30 min, and not significantly decreases within one week after 153Sm-EDTMP complex formation

  5. Dislocations in SmS single crystals

    International Nuclear Information System (INIS)

    Single crystals of SmS with NaCl structure are grown by zone melting in a sealed molybdenum tube. Dislocations introduced during cleaving the crystal are investigated by transmission electron microscopy. The dislocations have Burgers vector of 1/2 and their glide plane is (11-bar0), i.e. the slip system is (11-bar0) as in alkali-halide NaCl-type crystals. The slip seems to be governed by the Peierls mechanism for the screw dislocation. (author)

  6. Samlokalisering av småbedrifter

    OpenAIRE

    Myhre, Christi Wigenstad

    2012-01-01

    Alle bedrifter, uavhengig av størrelse, har sine oppgaver som må løses, både kjernefaglige og administrative. Imidlertid har ikke små bedrifter samme mulighet til spesialiseringer innen ulike fagfelt, slik som store bedrifter. I de minste bedriftene er det gjerne den som eier og driver bedriften som tar seg av alle oppgaver. For at en virksomhet skal være så konkurransedyktig og effektiv som mulig, er det viktig å utnytte bedriftens kjernekompetanse optimalt, og da kan det være hensi...

  7. A IBM study of quasibands in 166Sm

    International Nuclear Information System (INIS)

    The interacting boson model-1 (IBM-1) of Arima and Iachello has been successful in describing the collective nuclear properties in the medium mass nuclei. Earlier systematic studies of 146-154Sm have been performed using interacting boson model and Dynamic Pairing-Plus-Quadrupole (DPPQ) Model. Very recently Diab presented electrical monopole transition structure of 150Sm isotope. Simpson et al. successfully interpreted the isomers of 156-166Sm using Quasiparticle Rotor Model

  8. China vs.EU Protectionism

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    China files a complaint with the WTO for the first timeagainst the EU’s anti-dumping measures Recently,a trade row between the European Union(EU) and China-the world’s first and third biggesteconomies,respectively-hascaused concerns.

  9. 2006 EU-China Partenariat

    Institute of Scientific and Technical Information of China (English)

    Yu Ping

    2006-01-01

    @@ China Council for the Promotion of International Trade (CCPIT)Under the approval of the State Council of People's Republic of China and the European Commission(EC),jointly sponsored by European Commission and CCPIT, the 2006 EU-China Partenariat will take place on November 9-10, 2006 in Chengdu, the capital city of Sichuan Province.

  10. 2006 EU-China Partenariat

    Institute of Scientific and Technical Information of China (English)

    Yu; Ping

    2006-01-01

      China Council for the Promotion of International Trade (CCPIT)Under the approval of the State Council of People's Republic of China and the European Commission(EC),jointly sponsored by European Commission and CCPIT, the 2006 EU-China Partenariat will take place on November 9-10, 2006 in Chengdu, the capital city of Sichuan Province.……

  11. CHRiSM: CHance Rules induce Statistical Models

    OpenAIRE

    Sneyers, Jon; Meert, Wannes; Vennekens, Joost

    2009-01-01

    A new probabilistic-logic formalism, called CHRiSM, is introduced. CHRiSM is based on a combination of CHR and PRISM. It can be used for high-level rapid prototyping of complex statistical models by means of chance rules. The underlying PRISM system can then be used for several probabilistic inference tasks, including parameter learning. We describe a source-to-source transformation from CHRiSM rules to PRISM, via CHR(PRISM). Finally we discuss the relation between CHRiSM and probab...

  12. Sum Peak Measurements for ICC and PK Determination in the Decay of 152,154 Eu

    International Nuclear Information System (INIS)

    The X and gamma rays energies and intensities from decay of 152 Eu were measured accurately using high resolution HPGe detector. The sum peak technique is used to determine the internal conversion coefficients (K) for the first excited states in 152 Sm, 152 Gd and 154 Gd and the K-capture probability (Pk). The Experimental results indicate for (K) a good agreement with the experimental and theoretical values for pure E2 transitions. Also the Pk values show an agreement with the experimental and theoretical values. 3 figs., 5 tabs

  13. Whither the EU-China Strategic Partnership?

    Institute of Scientific and Technical Information of China (English)

    Stanley; Crossick

    2006-01-01

    EU and Chinese leaders met in Helsinki for their ninth bilateral summit on September 9 against a backdrop of growing tensions on trade issues. Only a few days after the summit, the EU requested the establishment of a WTO panel on Chinese auto parts tariffs. A "strategic partnership" between the EU and China was agreed as a joint aim at the EU-China summit in The Hague in December

  14. EU territorial governance: learning from institutional progress

    OpenAIRE

    Janin Rivolin Yoccoz, Umberto

    2010-01-01

    EU territorial governance is a concept now familiar to European planners and decision makers. However, the lack of an official definition makes its relationship with planning activities and processes in the EU member countries unclear. Looking back at the recent history of various attempts to factor territory into the EU policy agenda, this article proposes a systematic review of institutional documents regarding, in a direct or indirect manner, EU territorial governance. The aim of the artic...

  15. Horse-trading over the EU budget

    OpenAIRE

    Neheider, Susanne

    2007-01-01

    About 75% of the EU budget are transfer expenditures that go to the agricultural sector and to regional policies. This has long been criticised but the structure of the EU budget has barely changed over the last decades. The EU finances are mainly based on a unanimous agreement between the heads of state or government of the EU member states. During budget negotiations, horse trading or logrolling is a common practice. Negotiators combine expenditure positions and arrangements on the revenue ...

  16. Sm@C1(153491)-C94: A missing isomer from Sm@C94 mono-metallofullerenes

    Science.gov (United States)

    Zhao, Pei; Guo, Yi-Jun; Zhao, Rui-Sheng; Zhao, Xiang

    2016-01-01

    The Sm-containing endohedral metallofullerene (EMF) Sm@C94 has been investigated by quantum chemical and statistical thermodynamic methods. Sm@C1(153491)-C94 and Sm@C3v(153493)-C94 which both satisfy the isolated-pentagon rule (IPR) are exposed to possess considerable thermodynamic stabilities within the fullerene-formation temperature region (500-3000 K). Sm@C3v(153493)-C94 has been indeed determined experimentally, and a novel structure, Sm@C1(153491)-C94, is reported for the first time. These two isomers are related by a single Stone-Wales transformation. Meanwhile, frontier molecular orbital, natural electron configuration, and Mayer bond order analyses were employed to uncover their electronic properties. In addition, their optical spectra were simulated to support experimental identification and characterization.

  17. Synthesis and luminescence of Eu3+ doped hydroxyapatite nanocrystallines: Effects of calcinations and Eu3+ content

    International Nuclear Information System (INIS)

    Eu3+ doped hydroxyapatite (Eu-HAP) luminescent nanocrystallines were prepared by ultrasound assisted precipitation method. Aiming to seek a compromise proposal for achieving high luminescence and nanocrystallines, the effects of calcinations temperature and Eu3+ doping content on luminescence property as well as phase composition, crystal size and crystallinity of Eu-HAP crystals were investigated. The results showed that the luminescence of Eu-HAP was enhanced by the thermal treatment and the increasing Eu doping content. However, the higher temperature and the excess Eu resulted in the size increase and phase composition change of HAP respectively. The 2% Eu doping content and calcinations temperature of 600 °C were preferred for preparing Eu-HAP nanocrystallines with strong luminescence. The Eu-HAP nanocrystallines were about 20–40 nm in diameter (TEM) and could be well dispersed in water to form aqueous suspension of about 140 nm (DLS intensity-averaged diameter). Eu-HAP nanocrystalline could be used as a fluorescent probe for cell labeling. - Highlights: ► 20–40 nm Eu-HAP luminescent nanocrystallines were prepared by the precipitation method. ► 2% Eu doping content and calcinations at 600 °C were preferred to prepare Eu-HAP. ► Eu-HAP nanocrystallines could be well dispersed to form aqueous suspension. ► Eu-HAP nanocrystallines could be used as cell labels.

  18. Eu-doped CsBr phosphor as a new optically-stimulable phosphor material for medical x-ray imaging sensor

    International Nuclear Information System (INIS)

    CsBr phosphor ceramics doped with different luminescence centres such as In2O3, Eu2O3, EuCl3, SmCl3, TbCl3, GdCl3 or NdCl3 as the candidate for a new optically-stimulable phosphor for medical X-ray imaging sensor were prepared using a conventional ceramic fabrication process. It was found that X-ray-irradiated Eu-doped CsBr (CsBr:Eu) exhibited intense optically stimulated luminescence (OSL). The peak wavelength of the OSL emission and stimulation spectra of CsBr:Eu phosphor ceramic sample were 450 and 690 nm, respectively. The dependence of OSL properties on the conditions of preparation of phosphor ceramic samples, such as Eu concentration, sintering temperature and sintering time, were studied. The optimum preparation conditions were also studied. It was found that the OSL intensity of CsBr:Eu phosphor ceramics fabricated under optimum preparation conditions is higher than that of commercially available imaging plates using BaFBr:Eu. (authors)

  19. The emerging EU quality of care policy

    DEFF Research Database (Denmark)

    Vollaard, Hans; van de Bovenkamp, Hester M.; Vrangbæk, Karsten

    2013-01-01

    Despite the fact that Member States and many citizens of the EU like to keep healthcare a foremost national competence and the EU treaties state that Member States remain primarily responsible for the organization and delivery of health care services, the European Union (EU) has expanded its...

  20. The SmS-Ga2S3 section of the ternary Sm-Ga-S system

    International Nuclear Information System (INIS)

    The SmS-Ga2S3 section of the Sm-Ga-S system is investigated by differential-thermal, XPA, and microstructural analyses and changes in the microhardness. The XPA was performed with a DRON-2 diffractometer using CuK /SUB a/ radiation. Microstructural analysis showed that alloys containing 0-2, 33.3, and 50 mole % SmS were single-phase and the rest were two-phase

  1. Cross-section SmS-Ga2S3 of Sm-Ga-S ternary system

    International Nuclear Information System (INIS)

    The SmS-Ga2S3 system state diagram has been built up for the first time on the basis of the data of differential thermal, microstructural, and X-ray phase analyses and also according to the results of microhardness measurements. It has been established that ternary SmGa2S4, SmGa4S7 compounds are formed in the system

  2. Invisible KL decays in the SM extensions

    Science.gov (United States)

    Gninenko, S. N.; Krasnikov, N. V.

    2016-07-01

    In the Standard Model (SM), the branching ratio for the decay KL → νν¯ is helicity suppressed and predicted to be very small ≤ O(10‑17). We consider two natural extensions of the SM as the two-Higgs-doublet model (2HDM) and the neutrino minimal Standard Model (νMSM) with additional singlet scalar, whose main feature is that they can lead to an enhanced Br(KL → invisible). In the 2HDM, the smallness of the neutrino mass is explained due to the smallness of the second Higgs doublet vacuum expectation value. Moreover, the νMSM extension with additional singlet field can explain the (g ‑ 2)μ anomaly. The considered models demonstrate that the KL → invisible decay is a clean probe of new physics scale well above 100 TeV, that is complementary to rare K → π + invisible decay, and provide a strong motivation for its sensitive search in a near future low-energy experiment.

  3. Preparation and characterization of magnetic EuO and related compounds: EuS and Eu2O3

    OpenAIRE

    Moder, Iris

    2012-01-01

    Ferromagnetic europium monoxide (EuO) displays a huge variety of physical phenomena and due to its simple structure it is often used as a model system. It shows magneto-optic Kerr effect, spin-dependent transport and, in the case of Eu doped EuO, a metal-insulator transition showing a colossal magnetoresistance. EuO is also the only known binary oxide that can be grown in a thermodynamically stable form in contact with silicon. The application of EuO for spin injection either by matching its ...

  4. Immunocapture of circulating Schistosoma mansoni cathepsin B antigen (Sm31) by anti-Sm31 polyclonal antibodies.

    Science.gov (United States)

    González, Amelia Y; Sulbarán, Guidenn S; Ballen, Diana E; Cesari, Italo M

    2016-06-01

    Adult Schistosoma mansoni parasites have the capacity to degrade ingested host hemoglobin and other host plasma proteins by using a series of gut proteolytic enzymes, including cathepsin B; this enzyme is released to the host intravascular environment during regurgitations of adult worms. Cathepsin B becomes thus a circulating parasite component that has been shown to be specifically recognized as the Sm31 antigen by antibodies present in most S. mansoni infected patients. Taking advantage of this immunological property, we attempted here to immunocapture Sm31 from sera of infected patients using specific polyclonal rabbit antibodies raised against a highly enriched preparation of Sm31 and detect its intrinsic proteolytic activity using a previously described solid-phase procedure called Cysteine Protease Immuno Assay (CPIA). To produce highly specific anti-Sm31/cathepsin B antibodies, cathepsin B (Sm31 or SmCB) was enriched more than 3000-folds from an adult worm preparation using a series of conventional biochemical steps including ion exchange and affinity chromatography. Anti-cathepsin B antibodies were generated by immunizing rabbits with the enriched cathepsin B fraction; these antibodies recognized a band of Mr.~31kDa in Western-blot (WB) analysis of this fraction and were able to capture, in a modified CPIA procedure, Sm31/SmCB present in sera from infected Venezuelan patients living in low endemic areas for schistosomiasis. CPIA showed 100% sensitivity and 100% specificity; representing a new diagnostic tool to detect circulating Sm31 antigen in actual infections. PMID:26709076

  5. High photocatalytic performance of BiOI/Bi2WO6 toward toluene and Reactive Brilliant Red

    International Nuclear Information System (INIS)

    Graphical abstract: When BiOI/Bi2WO6 catalyst was exposed to UV or visible light, the electrons in the valence band of Bi2WO6 would be excited into the conduction band and then injected into the more positive conduction band of BiOI. Therefore, the photoelectrons were generated from Bi2WO6 and transferred across the interface between BiOI and Bi2WO6 to the surface of BiOI, leaving the photogenerated holes in the valence band of Bi2WO6. In this way, the photoinduced electron–hole pairs were effectively separated. Highlights: ► BiOI sensitized Bi2WO6 catalysts were successfully prepared by a facile method. ► The 13.2% BiOI/Bi2WO6 catalyst exhibits higher photoactivities than P25. ► A possible transfer process of photogenerated carriers was proposed. - Abstract: BiOI sensitized nano-Bi2WO6 photocatalysts with different BiOI contents were successfully synthesized by a facile deposition method at room temperature, and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) high-resolution transmission electron microscopy (HR-TEM), photoluminescence (PL) spectra, UV–vis diffuse reflection spectroscopy (UV–vis DRS) and Brunauer–Emmett–Teller (BET) surface area measurements. The photocatalytic activity of BiOI/Bi2WO6 was evaluated by the photo-degradation of Reactive Brilliant Red (X-3B) in suspended solution and toluene in gas phase. It has been shown that the BiOI/Bi2WO6 catalysts exhibit a coexistence of both tetragonal BiOI and orthorhombic Bi2WO6 phases. With increasing BiOI content, the absorption intensity of BiOI/Bi2WO6 catalysts increases in the 380–600 nm region and the absorption edge shifts significantly to longer wavelengths as compared to pure Bi2WO6. The 13.2% BiOI/Bi2WO6 catalyst exhibits obviously higher UV and visible light photocatalytic activities than commercial P25, pure Bi2WO6 and BiOI, for the photodegradation of toluene and X-3B. The remarkably enhanced photocatalytic activities can be attributed to the

  6. EU Privacy seals project: Comparison with other EU certification schemes

    OpenAIRE

    Rodrigues, Rowena; Barnard-Wills, David; Wright, David; REMOTTI Luca; DAMVAKERAKI Tonia; De Hert, Paul; PAPAKONSTANTINOU Vagelis

    2013-01-01

    This report identifies and analyses key EU certification schemes in select sectors such as: network and information security, general product compliance, the environment, financial auditing and accounting, entertainment, the food industry and the telecommunications sectors and analyses them according to a standard set of criteria in relation to their background, development, practical set-up, legislative mandate (e.g., relevant directives, rules, links to legal obligations), main concerns and...

  7. Crystal growth, structure, infrared spectroscopy, and luminescent properties of rare-earth gallium borates RGa3(BO3)4, R = Nd, Sm-Er, Y

    Science.gov (United States)

    Borovikova, Elena Yu.; Boldyrev, Kirill N.; Aksenov, Sergey M.; Dobretsova, Elena A.; Kurazhkovskaya, Victoria S.; Leonyuk, Nikolay I.; Savon, Alexander E.; Deyneko, Dina V.; Ksenofontov, Dmitry A.

    2015-11-01

    Crystals of the rare-earth gallium borates RGa3(BO3)4, where R = Nd, Sm-Er, or Y, were grown by the flux method. The crystal structures of RGa3(BO3)4 (R = Eu, Ho) were studied on the basis of single-crystal X-ray diffraction measurements. The hexagonal unit-cell parameters are a = 9.4657(1) Å, c = 7.4667(1) Å and a = 9.4394(2) Å, c = 7.4322(1) Å for EuGa3(BO3)4 and HoGa3(BO3)4, respectively, space group R32. Structure model was determined by "charge flipping" method and refined to R = 1.93% [EuGa3(BO3)4] and R = 1.89% [HoGa3(BO3)4] in anisotropic approximation. All grown gallium borates were investigated by infrared (IR) spectroscopy technique in a middle and far IR region. IR spectra of rare-earth gallium borates correspond to a pure rhombohedral (R32) polytype structure. Small inclusions of a monoclinic phase were detected only in Eu and Nd compounds. Luminescence of Eu and Ho gallium borates was studied at room temperature. The measured decay times for the most intensive emission lines of EuGa3(BO3)4 (∼614 nm) and HoGa3(BO3)4 (434 nm) are 940 μs and 140 μs, respectively. The scheme of crystal-field energy levels of Eu3+ in EuGa3(BO3)4 was built on the basis of the temperature-dependent optical transmission measurements combined with the luminescence data. The measured UV absorption edge for RGa3(BO3)4 is at about 300 nm.

  8. Structure and Evolution of EU Budget Revenue

    Directory of Open Access Journals (Sweden)

    Nicoleta Mihaela Florea

    2013-11-01

    Full Text Available Although small size, representing only 1% of EU wealth, its budget is an important tool for achieving the objectives of integration. Basically, in one form or another, every EU citizen benefits from the EU budget at the local, national and European level: food and safer toys, new roads and better quality of security at EU borders. These are just a few examples of areas where the EU budget plays a decisive role. To fulfil its objectives, the European Union has traditional own resources, the VAT - based own resources and the GNI- based resources.

  9. EU-India migration and trade linkages

    OpenAIRE

    TUMBE, Chinmay

    2013-01-01

    CARIM-India: Developing a knowledge base for policymaking on India-EU migration This paper reviews the relationship between migration and trade between India and the European Union (EU). It provides an overview of EU-India trade across various dimensions and links it with migration in three specific contexts: (a) The $ 14 billion EU-India diamond trade that represents nearly 15% of total EU-India merchandise trade, and that is attributed to the direct and active role played by Indian immig...

  10. Kinetic spectrophotometric determination of trace copper(II) ions by their catalytic effect on the reduction of brilliant cresyl blue by ascorbic acid

    OpenAIRE

    ULUSOY, Halil İbrahim; GÜRKAN, Ramazan; AKÇAY, Mehmet

    2011-01-01

    In the present study, a novel catalytic-kinetic spectrophotometric method was developed for the determination of trace amounts of copper. It is based on the catalytic effect of Cu(II) on the reduction of brilliant cresyl blue (BCB) by ascorbic acid in pH 5.0 acetate buffer medium. The reaction was monitored spectrophotometrically by measuring the decrease in absorbance of BCB at 624 nm. The operating conditions regarding concentration of reagents, pH, time, and temperature were esta...

  11. Effects of Brilliant Blue G on Serum Tumor Necrosis Factor-α Levels and Depression-like Behavior in Mice after Lipopolysaccharide Administration

    OpenAIRE

    Ma, Min; Ren, Qian; Zhang, Ji-chun; Hashimoto, Kenji

    2014-01-01

    Objective Accumulating evidence suggests that inflammation plays a role in the pathophysiology of major depression. The adenosine triphosphate (ATP)-sensitive P2X7 receptor (P2X7R) plays a crucial role in microglial activation caused by inflammation. The dye brilliant blue G (BBG) is a P2X7R antagonist. This study examined whether BBG shows antidepressant effects in an inflammation-induced model of depression. Methods We examined the effects of BBG (12.5, 25, or 50 mg/kg) on serum tumor necro...

  12. The Social Dimension of EU Trade Policies

    DEFF Research Database (Denmark)

    Manners, Ian

    2009-01-01

    as human rights in the EU's external action from a normative power perspective. Next, the article will use the tripartite analytical framework to examine the principles, actions, and impact of the social dimension in EU trade policies found in the contributions to this special issue. Then the article......This special issue on the social dimension of European Union (EU) external trade relations analyses the commitment, capacity, and consequences of the EU as a global social power. In other words, is the EU committed to social principles? Does it have the capacity to engage in persuasive actions......? And what are the consequences of its socialising impact in promoting the social dimension of globalisation through trade? These are all difficult questions to ask of any actor in global politics, let alone a hybrid polity such as the EU. The special issue also addressed two tensions at the heart of the EU...

  13. Småbørn i interaktion

    DEFF Research Database (Denmark)

    Fisker, Tine Basse

    Småbørn i interaktion. En undersøgelse af socialt udviklingspotentiale og muligheder for interaktion for småbørn med autisme i forskellige pædagogiske og organisatoriske miljøer. På baggrund af kvalitativ, naturalistisk empiri, i form af observationer, videooptagelser, interviews og samtaler, søg...

  14. Chemical study on the labeling of EDTB with 153Sm

    International Nuclear Information System (INIS)

    Objective: According to conjugation characteristic of N, N, N', N'-tetrakis (2-benzymidazolylmethyl)-1, 2-ethanediamine (EDTB) with lipiodol selectively retained within hepatic tumors, in this paper, the labeling of EDTB with therapeutic nuclide 153Sm was first systematically studied by different labeling pathways, to further develop new labeled compounds with 153Sm for the treatment of hepatocellular carcinoma. Methods: A radio-paper chromatography (RPC) was used to determine the purity of the labeled compound with the mixture of pyridine: ethanol: water (1:2:4, V/V) as developer. Using independence variable method, the effect of labeling conditions, such as reaction time, temperature and concentration of EDTB on labeling yield were investigated, and the in vitro stability of 153Sm-EDTB was also demonstrated by RPC. Results: the RPC analysis indicated that Rf value of free 153Sm or 153Sm-EDTB was 0.0-0.1 and 0.6-0.7, respectively. Using acetic acid as reaction medium, in an open nitrogen-pouring labeling system, heated in boiling water bath for not less than 30 min, the labeling yield of 153Sm-EDTB was more than 97% and could remain in 24 hours after preparing the labeled compound at room temperature. Conclusion: The optimum labeling method and conditions were achieved. The in vitro stability of 153Sm-EDTB was good; thereby this provided possibility for further preparation and biological research of potential therapeutic radiopharmaceutical labeled lipiodol with 153Sm via EDTB for liver cancer

  15. Isotope shift measurement of autoionization Rydberg states of Sm

    International Nuclear Information System (INIS)

    The observation and measurement of isotope shift of autoionization Rydberg states 8G1/2 of Sm was reported. The isotope shift of the first excited state of Sm was also measured. Results were compared with that in Ref. 5

  16. Isotope shift measurement of autoionization Rydberg states of Sm

    International Nuclear Information System (INIS)

    The observation and measurement of isotope shift of autoionization Rydberg states 8G1/2 of Sm was reported. The isotope shift of the first excited state of Sm was also measured. Results were compared with that in Ref. 5. copyright 1997 American Institute of Physics

  17. Symmetries for SM Alignment in multi-Higgs Doublet Models

    CERN Document Server

    Pilaftsis, Apostolos

    2016-01-01

    We derive the complete set of maximal symmetries for Standard Model (SM) alignment that may occur in the tree-level scalar potential of multi-Higgs Doublet Models, with $n > 2$ Higgs doublets. Our results generalize the symmetries of SM alignment, without decoupling of large mass scales or fine-tuning, previously obtained in the context of two-Higgs Doublet Models.

  18. Limits of Evidence within EU

    Directory of Open Access Journals (Sweden)

    Monica Pocora

    2015-05-01

    Full Text Available The issue of admissibility of evidence has been regulated only very scarcely in the EU. Judicial cooperation in criminal matters has been embracing the increasing number of instruments, covering plethora of aspects, however, the field of admissibility of evidence remains almost untouched. Can the Area of Freedom, Security and Justice be called the Common Evidence Area? From the national perspective, the issue of admissibility of evidence is still subject to divergent solutions in the Member States, concerning the common law and continental law systems, i.e. the right of access to a lawyer. Thus, the paper aims to take into account the tendencies of legal rule in matter of admissibility of evidence, the dynamic of evidence movement within EU area.

  19. EU focus on climate change

    International Nuclear Information System (INIS)

    Faced with the mounting evidence of the harmful effects of climate change, the European Union is convinced that the world must take urgent action to tackle the problem. That is why the EU has been at the forefront of international efforts to deal with climate change for well over a decade. The EU is convinced that the status quo is simply not an option. Without urgent, concerted action, the problem will continue to get worse with potentially disastrous consequences. That is why the European Union has consistently taken the lead in international moves to tackle climate change and why it will continue to develop this strategy for as long as it takes to guarantee a world for ourselves and our children where everyone can grow, breathe and live in safety

  20. Menneskerettigheder og handelspolitik i EU

    DEFF Research Database (Denmark)

    Manners, Ian

    2012-01-01

    for basic human rights such as the right to food, the right heat, the right to have a job"; we still live with this division today. There have been a number of attempts over the last 10-15 years, who have tried to work around these problems. One of them is a movement within the UN are trying to...... a hundred years, but suddenly became a focal point for reaction against the liberalization of the global economy. It is extremely interesting. Again this demonstrates the complexity of EU policy. Some Member States were quite supportive of the WTO, while others expected the ILO to take the lead. See...... of fair trade. And intellectually is this contradiction "free and fair trade" in the same sentence becomes, in an attempt both economically and politically to get it to make sense within the EU. Ian Manners is a professor and works at Roskilde University, the Institute for society and globalization...

  1. Cross sections of deuteron induced reactions on $^{nat}$Sm for production of the therapeutic radionuclide $^{145}$Sm and $^{153}$Sm

    CERN Document Server

    Tárkányi, F; Takács, S; Ditrói, F; Csikai, J; Ignatyuk, A V

    2014-01-01

    At present, targeted radiotherapy (TR) is acknowledged to have great potential in oncology. A large list of interesting radionuclides is identified, including several radioisotopes of lanthanides, amongst them $^{145}$Sm and $^{153}$Sm. In this work the possibility of their production at a cyclotron was investigated using a deuteron beam and a samarium target. The excitation functions of the $^{nat}$Sm(d,x)$^{145153}$Sm reactions were determined for deuteron energies up to 50 MeV using the stacked-foil technique and high-resolution $\\gamma$-ray spectrometry. The measured cross sections and the contributing reactions were analyzed by comparison with results of the ALICE, EMPIRE and TALYS nuclear reaction codes. A short overview and comparison of possible production routes is given.

  2. EU Law and Multiple Discrimination

    OpenAIRE

    Nielsen, Ruth

    2006-01-01

    In EU law, nationality and gender were the only equality issues on the legal agenda from the outset in 1958 and for about 40 years. Multiple discrimination was not addressed until the 1990's. The intersectionality approach which has been widely discussed outside Europe has mainly been used with a view to gendermainstreaming the fight against other kinds of discrimination (on grounds of ethnic origin, age, etc).

  3. EU Law and Multiple Discrimination

    DEFF Research Database (Denmark)

    Nielsen, Ruth

    2006-01-01

    In EU law, nationality and gender were the only equality issues on the legal agenda from the outset in 1958 and for about 40 years. Multiple discrimination was not addressed until the 1990's. The intersectionality approach which has been widely discussed outside Europe has mainly been used with a...... view to gendermainstreaming the fight against other kinds of discrimination (on grounds of ethnic origin, age, etc)....

  4. EU Kids Online: national perspectives

    OpenAIRE

    Haddon, Leslie; Livingstone, Sonia

    2012-01-01

    This comparative report summarises the internet related experiences of children in the 33 countries now participating in EU Kids Online. Findings for eight new countries are added to the 25 included in our previous reports – Croatia, Iceland, Latvia, Luxembourg, Malta, Russia, Slovakia and Switzerland. For each country, we present the key statistics and country-specific commentary on children’s internet access and use, activities and skills, risks and harm parental mediation and safe...

  5. Metallic nanowires on SmSi interface

    Energy Technology Data Exchange (ETDEWEB)

    Duverger, E; Palmino, F; Labrune, J C [Institut FEMTO-ST Dpt CREST, CNRS UMR 6174, 4 place Tharradin, BP 71427, 25211 Montbeliard cedex (France)

    2007-03-15

    The manufacture of nanowires and the exploitation of their specific properties are the great fields of fundamental and industrial research. Some nanostructuration can be obtained with the help of conventional lithography technics; nevertheless these technics are limited by the optical resolution, the introduction of many defects and the residual damage related to engraving. A new approach, which consists to create nanowires in-situ on pre structured SmSi(111) interface has been investigated by scanning tunneling microscopy (STM). This interface is known to permit the creation of many different 1D templates in the submonolayer range. We show in this study, the possibility to create Fe nano-objects of well-defined size distributed in an ordered array.

  6. School version of ESTE EU

    International Nuclear Information System (INIS)

    ESTE EU is information system and software for radiological impacts assessment to the territory of the country in case of radiation accident inside/outside of the country .The program enables to model dispersion of radioactive clouds in small-scale and meso-scale. The system enables the user to estimate prediction of the source term (release to the atmosphere ) for any point of radiation/nuclear accident in Europe (for any point of the release, but especially for the sites of European power reactors ). The system enables to utilize results of real radiological monitoring in the process of source term estimation. Radiological impacts of release to the atmosphere are modelled and calculated across the Europe and displayed in the geographical information system (GIS). The school version of ESTE EU is intended for students of the universities which are interested in or could work in the field of emergency response, radiological and nuclear accidents, dispersion modelling, radiological impacts calculation and urgent or preventive protective measures implementation. The school version of ESTE EU is planned to be donated to specialized departments of faculties in Slovakia, Czech Republic, etc. System can be fully operated in Slovak, Czech or English language. (authors)

  7. Micromagnetic Simulation of Magnetization Reversal in SmCo5/Sm2Co17 Magnets

    Institute of Scientific and Technical Information of China (English)

    荣传兵; 张宏伟; 杜晓波; 张健; 张绍英; 沈保根

    2004-01-01

    A three-dimensional finite element micromagnetic algorithm was developed to study the magnetization reversal of the SmCo5/Sm2Co17 based magnets. The influences of the microstructure and magnetic parameters on the coercivity were studied based on the model consisting of 64 irregular cells according to the experimental microstructure. Numerical results show that the coercivity increases with increasing the 2∶17-type cell size. Large cell boundary thickness leads to small coercivity. The drop of anisotropy constant of 1∶5 phase leads to the coercivity reducing, while the effect of exchange constant of 1∶5 phase on coercivity is contrary to that of exchange constant. The calculated field dependence of coercivity can be predicted by an inhomogeneous domain-wall pinning model. The microstructure parameter was analyzed by comparing the calculated coercivity.

  8. Luminescent Afterglow Behavior in the M2Si5N8: Eu Family (M = Ca, Sr, Ba

    Directory of Open Access Journals (Sweden)

    Koen Van den Eeckhout

    2011-05-01

    Full Text Available Persistent luminescent materials are able to emit light for hours after being excited. The majority of persistent phosphors emit in the blue or green region of the visible spectrum. Orange- or red-emitting phosphors, strongly desired for emergency signage and medical imaging, are scarce. We prepared the nitrido-silicates Ca2Si5N8:Eu (orange, Sr2Si5N8:Eu (reddish, Ba2Si5N8:Eu (yellowish orange, and their rare-earth codoped variants (R = Nd, Dy, Sm, Tm through a solid state reaction, and investigated their luminescence and afterglow properties. In this paper, we describe how the persistent luminescence is affected by the type of codopant and the choice and ratio of the starting products. All the materials exhibit some form of persistent luminescence, but for Sr2Si5N8:Eu,R this is very weak. In Ba2Si5N8:Eu the afterglow remains visible for about 400 s, and Ca2Si5N8:Eu,Tm shows the brightest and longest afterglow, lasting about 2,500 s. For optimal persistent luminescence, the dopant and codopant should be added in their fluoride form, in concentrations below 1 mol%. A Ca3N2 deficiency of about 5% triples the afterglow intensity. Our results show that Ba2Si5N8:Eu(,R and Ca2Si5N8:Eu(,R are promising persistent phosphors for applications requiring orange or red light.

  9. Phase equilibria in Sb2S3-SmS system

    International Nuclear Information System (INIS)

    Methods of physicochemical analysis is used to study Sb2S3-SmS cross section, which is a quasibinary one of Sm-Sb-S ternary system. Three new compounds: SmSb4S7, SmSb2S4 and Sm3Sb4S9 are formed in the system, the first one melts congruently, two others - incongruently. Solubility of Sb2S3 is 3 mol.% SmS at 300 K

  10. Optic phonon anomalies and f-d hybridization in SmS and SmB6

    International Nuclear Information System (INIS)

    The optic phonons of semiconducting SmS and of (homogeneously) mixed-valent SmS and SmB6 have been investigated by means of Raman scattering. The dominant electron-phonon interaction upon resonantly exciting the 4f shell is revealed as a coupling of the strongly localized 4f hole at the Sm site to full symmetric (Asub(1g)) displacements of the nearest neighbour anions, i.e. mainly to LO(L) phonons. Semiconducting and mixed-valent, metallic SmS show a 'softening' of the LO(L) phonon frequencies with respect to the other divalent and trivalent rare earth sulfides, respectively, going in parallel with a 'softening' of the bulk modulus. The f-d hybridization is considered as the common origin of these phonon frequency renormalizations. (author)

  11. A simple conductometric method for trace level determination of brilliant green in water based on β-cyclodextrin and silver nitrate and determination of their thermodynamic parameters

    Directory of Open Access Journals (Sweden)

    Roya Mohammad Zadeh Kakhki

    2014-12-01

    Full Text Available A gravimetric and complexometric titration method based on conductometric technique is presented for the quantitative determination of brilliant green (BG in water. The equilibrium constants and the thermodynamic parameters for the complex formation of β-cyclodextrin (β-CD with brilliant green (BG and precipitation of silver nitrate with BG have been determined by conductivity measurements in water. The results suggest that stable 1:1 complex is formed between BG and β-cyclodextrin and the thermodynamic parameters (ΔHc°,ΔSc° for this complexation reaction have been determined from temperature dependence of the stability constant using the van’t Hoff plots. Based on the obtained results, the conductometric method for the determination of BG in the presence of β-CD at 25 °C was developed in the range of 10−8–10−3 molL−1 and with AgNO3 is 10−3–10−5 molL−1.

  12. Territorial Cooperation and socio-economic development in the Old EU , New EU and Non EU

    OpenAIRE

    Topaloglou, Lefteris; Cupcea, Victor; Dimitris KALLIORAS; Pantazis, Panagiotis

    2012-01-01

    Territorial cooperation, taken as collaboration “beyond national boundaries†, among administrative bodies and/or political actors, generally offers the ground for functional cooperation towards problem-solving and challenge-tackling, along with the exploitation of the local and regional potentials. In the EU, given the high-level of political integration amongst the Member States, numerous rules and structures have been created to support territorial cooperation. In this context, the terr...

  13. Assessment of microseeds biodegradability of Sm and Sm:Ba splenic implants in rabbits

    International Nuclear Information System (INIS)

    The radioactive interstitial implants have applications in controlling neoplasm in several regions of the human body. Currently the permanent brachytherapy seeds implanted in the spleen and other organs are made of I-125 seeds. After the total emission of radiation, the metal encapsulated seed remains inert in the implanted area. Seeds of bioactive ceramics have been prepared with Sm-152 incorporation to be activated in Sm-153. This study aimed to develop surgical technique for implanting biodegradable micro-seeds in the spleen of the rabbit. Three micro-seeds were introduced by hypodermic needle in the spleen in eight rabbits by median laparotomy. Subsequently, there were clinical and functional reactions of the animal to the implanted foreign body. The other objective was to perform the animal monitoring by radiography, produced in time sequence, and pathological studies of a fragment of the spleens of rabbits. The results show the effectiveness of surgery, the identification of the implanted material by radiography in vivo, and the biocompatibility of micro-seeds most of Sm and Sm:Ba. These seeds of reduced volume, 0.3x 1.6 mm, could be monitored for radiological studies in 2 periods: early and later implant. On the later studies, radiography was taken at 60d post-implant. Biopsies were taken and radiographs of the samples were also performed for evidencing the degradation state of the seeds. The results of the two groups of four rabbits are presented. They show partial degradation of the seed verified by radiographic contrast which is related to the atomic number of the elements and mass density in the seed. The biopsy showed that the ceramic is clearly absorbed by the spleen tissue and form tissue-implant interface. The histological slides showed an inflammatory reaction with presence of fibrosis of the giant cell foreign body. In conclusion, the radiograph shows a suitable noninvasive technique for monitoring the degradation of micro-seed ceramics in vivo

  14. Beyond EU navel-gazing: Taking stock of EU-centrism in the analysis of EU foreign policy

    OpenAIRE

    Keuleers, Floor; Fonck, Daan; Keukeleire, Stephan

    2016-01-01

    Concerns on the EU-centric character of EU foreign policy analysis have become more frequent in recent years, yet a systematic toolbox for diagnosing and remedying this problem is still lacking. This article’s contribution is twofold. First, it proposes a new typology of three approaches to foreign policy analysis, giving conceptual body and nuance to the debate on EU-centrism. The typology can be used for scrutinizing existing analyses, as well as for shaping new research projects. The secon...

  15. Thermal neutron capture cross sections for the 152Sm(n,γ) 153Sm and 154Sm(n,γ) 155Sm reactions at 0.0536 eV energy

    Science.gov (United States)

    Uddin, M. S.; Chowdhury, M. H.; Hossain, S. M.; Latif, Sk. A.; Islam, M. A.; Hafiz, M. A.; Mubin, S. H.; Zakaria, A. K. M.; Yunus, S. M.; Azharul Islam, S. M.

    2008-11-01

    The neutron capture cross sections for the 152Sm(n,γ) 153Sm and 154Sm(n,γ) 155Sm reactions at 0.0536 eV neutron energy were measured using an activation technique based on the TRIGA Mark-II research reactor, relative to the reference reaction 197Au(n,γ) 198Au. The activity was measured nondestructively using gamma-ray spectroscopy. Our measured values at this neutron energy are the first ones and are compared with 1/ v based evaluated cross sections reported in the ENDF/B-VII and JENDL-3.3 libraries. The measured value for the 152Sm(n,γ) 153Sm reaction is 0.28% lower than JENDL-3.3 and 0.48% higher than ENDF/B-VII. Our value for the production of 155Sm is about 3% and 2.3% higher than the evaluated value with ENDF/B-VII and JENDL-3.3 at 0.0536 eV, respectively.

  16. Optical properties of Eu2+/Eu3+ mixed valence, silicon nitride based materials

    International Nuclear Information System (INIS)

    Eu2SiN3, a mixed valence europium nitridosilicate, has been prepared via solid-state reaction synthesis and its oxidation behavior and optical properties have been determined. Furthermore, the stability of several isostructural compounds of the type M2+L3+SiN3 has been predicted by using the density functional theory calculations, and verified by the actual synthesis of CaLaSiN3, CaEuSiN3 and EuLaSiN3. The band gap of CaLaSiN3 was found around 3.2 eV giving the material its yellow color. Eu2SiN3 on the other hand is black due to a combination of the 4f–5d absorption band of Eu2+ and the charge transfer band of Eu3+. Thermogravimetric analysis and Raman spectroscopic study of Eu2SiN3 revealed that oxidation of this compound in dry air takes place via a nitrogen retention complex. - Graphical abstract: Energy level scheme of Eu2SiN3 showing the occupied N3− 2p band (blue rectangle), unoccupied Eu2+ 5d band (white rectangle), occupied Eu2+ 4f ground states (filled red circles) and unoccupied Eu2+ ground states (open red circles). - Highlights: • Density functional theory calculations on the stability of M2+L3+SiN3 compounds. • Solid-state reaction synthesis of Eu2SiN3, CaLaSiN3, EuLaSiN3 and CaEuSiN3. • Determination of the Eu2+ 4f–5d and Eu3+ CT transitions in M2+L3+SiN3 compounds. • Oxidation of Eu2SiN3 in dry air takes place via a nitrogen retention complex

  17. Financial Integration into EU: The Romanian Case

    Directory of Open Access Journals (Sweden)

    Ibrahim Bozkurt

    2016-05-01

    Full Text Available The aim of this study is to investigate the determinants of integration between stock market of Romania and other stock markets of European Union (EU countries. Correlations between the stock returns represent the level of integration between the stock markets. Empirical analysis are performed with daily stock returns of 24 EU members including Romania for 2002-2012 period using panel data gravity models and correlations are investigated. Findings reveal that the following factors have significant and robust effects on the financial integration process of Romania with other 23 EU members; (i EU membership, (ii bilateral trade, (iii GDP per capita, (iv 2012 sovereign debt crisis and (v East European location. The results emphasize that intensifying economic relations with EU members can contribute the integration of Romanian stock market with other EU members. designed & hoste

  18. Corrosion behavior of Co-Sm based magnetic media

    International Nuclear Information System (INIS)

    In this article the long term stability of Co-Sm thin films, both with no overcoat and covered with silicon nitride layers of varying thickness, has been investigated by means of accelerated corrosion tests in vacuum, air, and in a humidity chamber. Bare Co-Sm films exhibit an accelerated decrease in magnetization with respect to reference Co-Pt films, dependent in part on the effective surface area of the magnetic film. X-ray photoelectron spectroscopy depth profiling and corrosion tests demonstrate that silicon nitride layers of about 8 nm should provide adequate protection against degradation of the magnetic properties of Co-Sm thin films

  19. ATTITUDES OF MACEDONIAN FARMERS TOWARDS EU ACCESSION

    OpenAIRE

    Kotevska, Ana; Martinovska-Stojcheska, Aleksandra; Ohlmer, Bo; Dimitrievski, Dragi

    2012-01-01

    Macedonia is a candidate-country for EU membership since 2005. The EU integrative process, without doubt, will have impact on the Macedonian economy and particularly on the agricultural sector, as being one of the most significant in terms of GDP contribution and workforce employer. So far, farmer's attitudes and intentions with regard to the EU integration and accession were not much investigated. In this sense, the objective of the paper is to provide understanding of the Macedonian farmers...

  20. Issues Related to EU's Foreign Policy

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ The European Union (EU) is widely regarded as an important international actor, and usually referred to as a big power like the U. S. , Russia, China and Japan. So naturally the foreign policy of the EU has caught attention of both officials and scholars over the world. However, the EU is also a combination of sovereign states, its foreign policy is different from others, and perhaps this is often ignored. For instance, unlike a single nation state, the EU's influence and power are different in various policy fields due to its different ways of decision-making and implementation. Also, different from the common currency, the forming of the common foreign policy of the EU doesn't mean the disappearance of respective member state's foreign policy. Only seeing or emphasizing one respect will lead to a misunderstanding of the EU. Moreover, as a unique "supranational and intergovernmental" organization in the world, the EU has too many complex institutions, names and terms. Of course, the situation is not better in the field of foreign policy, and it easily leads to confusion and misunderstanding. It is also necessary to point out that the EU is still in the process of evolvement, and in particular, as one of the major reforms of the EU in recent years, the foreign policy-making mechanism has been in the center of change and adjustment. It is no doubt that this adds to the difficulties of studying and understanding the EU's foreign policy. In a word, the author thinks it is necessary to raise some major issues related to the EU's foreign policy and delve into it in connecting with the EU's current development.

  1. The Integration of EU Banking Markets

    OpenAIRE

    Gual, Jordi

    2004-01-01

    The goal of this Paper is to provide an assessment of the EU policies that pursue the creation of a single banking market. The Paper evaluates the degree of integration of EU banking markets and discusses whether current policies are the most appropriate instruments for market integration. After comparing the key features of EU policy with alternative methods of market opening, the analysis stresses that market opening in regulated markets such as banking faces a difficult trade-off between r...

  2. Small Island Differentiation in EU Law

    OpenAIRE

    Arndís Kristjánsdóttir 1969

    2010-01-01

    The principle of uniformity in the application of European Union (EU) policy and law has long been institutionally asserted as one of its foundations. Referred to as the acquis communautaire, roughly translated from the French as “that which has been acquired by the Union”, it is the term for the accumulated legislation, and judicial decisions which constitute the body of EU law and to which immediate and complete compliance is requisite of incoming Member States. The EU, also referred to ...

  3. Challenges and problems of organic seed production in the EU – the EU Organic Seed Regulation

    OpenAIRE

    Wilbois , Klaus-Peter

    2005-01-01

    Content: - Organic Seed regime in the EU - Overview EU Organic Seed data base - Data Base Exeample: OrganicXseeds - Problems of the Organic Seed Regulation - Problems with MS's Data Base - How to overcome these problems - Recommendations for new MS

  4. EU Energy Law. Volume 4. The EU Greenhouse Gas Emissions Trading Scheme

    International Nuclear Information System (INIS)

    Gives valuable insights in the why's, how's, trade-offs, and critical design choices of the Emission Trading System of the European Union (EU ETS). The chapters deal with (1) The EU ETS: the result of a decade of policy action on the economic dimension of EU environmental policy; (2) The international climate policy developments of the 1990s: UNFCCC, the Kyoto Protocol, the Marrakech Agreements and the EU's Kyoto ratification decision; (3) Emissions trading: What is it? Design options and misconceptions; (4) The EU ETS Directive 2003/87/EEC explained; (5) The EU ETS Linking Directive explained; (6) The economic efficiency benefits of the EU ETS; (7) The NAP I experience; (8) The key importance of the Registry Regulation and of solid monitoring and verification; and (9) The potential role of the EU ETS for the elaboration of the post-2012 international climate regime. Conclusions are in chapter 10

  5. Crystal growth, structure and magnetic properties of the double perovskites Ln2MgIrO6 (Ln=Pr, Nd, Sm-Gd)

    International Nuclear Information System (INIS)

    Single crystals of double-perovskite type lanthanide magnesium iridium oxides, Ln2MgIrO6 (Ln=Pr, Nd, Sm-Gd) have been grown in a molten potassium hydroxide flux. The compounds crystallize in a distorted 1:1 rock salt lattice, space group P21/n, consisting of corner shared MO6 (M=Mg2+ and Ir4+) octahedra, where the rare earth cations occupy the eight-fold coordination sites formed by the corner shared octahedra. Pr2MgIrO6, Nd2MgIrO6, Sm2MgIrO6, and Eu2MgIrO6 order antiferromagnetically around 10-15 K. - Graphical abstract: A SEM image of a typical crystal of Ln2MgIrO6, which forms in the monoclinic double perovskite structure, is shown.

  6. The competitiveness of EU regions

    OpenAIRE

    Kourilova, Jana; Wokoun, Rene; Damborsky, Milan; Krejcova, Nikola

    2012-01-01

    The competitiveness of EU regions This paper results from the project financed by the Grant Agency of the Czech Republic (GA ÈR). The project was carried out by the research team consisting of both The Centre of Regional and Administrative Studies and The Regional Studies Department´s members in 2009 -2011. The introductory part of the paper is focused on the theoretical background with a special emphasis on the concept definition and determination of factors of the regional competitiveness....

  7. Reforming the EU Sugar Policy

    OpenAIRE

    Frandsen, Soren E.; Jensen, Hans Grinsted

    2002-01-01

    This article presents and analyses the impacts of the EU sugar policy. Particular attention is given to the modelling of the quite complex policy and the calibration of the global general equilibrium model at the member state level. Two scenarios are analysed, namely a reduction in the intervention price of sugar and the sugar quota. It is found that the economic impacts of the two scenarios are quite different in terms of the effects on European production and trade in sugar as well in terms...

  8. Menneskerettigheder og handelspolitik i EU

    DEFF Research Database (Denmark)

    Manners, Ian

    2012-01-01

    interesting to observe that it was interpreted as that we have to think about how we act in this area. Not that we had to rethink everything we do. You describe how Fair Trade concept of FLO (Fair Labor Organization) definition is officially recognized in the EU. Is not it strange that private or NGO...... a Western European perspective, the gross violations of human rights: torture, extrajudicial executions, ill-treatment of prisoners, etc. And they focused primarily on extremist regimes. In the 1980s they began to focus on communist regimes as religious freedom, freedom of expression, freedom of movement...

  9. Luminescence properties of the Sm-doped borate glasses

    Energy Technology Data Exchange (ETDEWEB)

    Kindrat, I.I. [University of Zielona Góra, Institute of Physics, Division of Spectroscopy of Functional Materials, 4a Szafrana Street, 65-516 Zielona Góra (Poland); Padlyak, B.V., E-mail: B.Padlyak@if.uz.zgora.pl [University of Zielona Góra, Institute of Physics, Division of Spectroscopy of Functional Materials, 4a Szafrana Street, 65-516 Zielona Góra (Poland); Vlokh Institute of Physical Optics, 23 Dragomanov Street, 79-005 Lviv (Ukraine); Drzewiecki, A. [University of Zielona Góra, Institute of Physics, Division of Spectroscopy of Functional Materials, 4a Szafrana Street, 65-516 Zielona Góra (Poland)

    2015-10-15

    The optical absorption and photoluminescence (emission and excitation) spectra as well as decay kinetics of a series of the Sm-doped glasses with Li{sub 2}B{sub 4}O{sub 7}, LiKB{sub 4}O{sub 7}, CaB{sub 4}O{sub 7}, and LiCaBO{sub 3} compositions were investigated and analysed. The Li{sub 2}B{sub 4}O{sub 7}:Sm, LiKB{sub 4}O{sub 7}:Sm, CaB{sub 4}O{sub 7}:Sm, and LiCaBO{sub 3}:Sm glasses of high optical quality have been obtained from the corresponding polycrystalline compounds in the air atmosphere, using a standard glass technology. On the basis of electron paramagnetic resonance (EPR) and optical spectra analysis it was shown that the samarium impurity is incorporated into the glass network as Sm{sup 3+} (4f{sup 5}, {sup 6}H{sub 5/2}) ions, exclusively. All observed 4f – 4f transitions of the Sm{sup 3+} centres in the optical absorption and luminescence spectra of the investigated glasses are identified. Most intense emission band of the Sm{sup 3+} ions peaked about 598 nm ({sup 4}G{sub 5/2} → {sup 6}H{sub 7/2} transition) is characterised by a single exponential decay with typical lifetime values, which depend on the basic glass composition as well as concentration and local structure of the Sm{sup 3+} luminescence centres. The quantum efficiency has been evaluated for observed transitions of the Sm{sup 3+} centres using obtained experimental lifetimes and radiative lifetimes calculated by Judd–Ofelt theory. The calculated high quantum efficiencies and measured quantum yields of luminescence show that the investigated borate glasses are perspective luminescence materials. Energy transfer from the Ce{sup 3+} non-controlled impurity and intrinsic luminescence centres to the Sm{sup 3+} centres has been observed. Peculiarities of the Sm{sup 3+} local structure in the network of investigated glasses have been discussed based on the obtained spectroscopic results and structural data. - Highlights: • The Sm-doped Li{sub 2}B{sub 4}O{sub 7}, LiKB{sub 4}O{sub 7}, Ca

  10. Magnetocaloric properties of Eu1-xLaxTiO3 (0.01 ≤ x ≤ 0.2) for cryogenic magnetic cooling

    Science.gov (United States)

    Rubi, Km; Midya, A.; Mahendiran, R.; Maheswar Repaka, D. V.; Ramanujan, R. V.

    2016-06-01

    We report magnetic and magnetocaloric (MCE) properties of polycrystalline Eu1-xLaxTiO3 samples over a wide composition range (0.01 ≤ x ≤ 0.20). It is found that the ground state changes from antiferromagnetic for x = 0.01 (TN = 5.2 K) to ferromagnetic for x ≥ 0.03 and the ferromagnetic Curie temperature increases from TC = 5.7 K for x = 0.03 to TC = 7.9 K for x = 0.20. The x = 0.01 sample shows a large reversible isothermal magnetic entropy change of -ΔSm = 23 (41.5) J/kg K and adiabatic temperature change of ΔTad = 9 (17.2) K around 6.7 K for a field change of μ0ΔH = 2 (5) Tesla. Although the peak value of -ΔSm decreases as La content increases, it is impressive in x = 0.2(-ΔSm = 31.41 J/kg K at T = 7.5 K for μ0ΔH = 5 T). The large value of MCE arises from suppression of the spin entropy associated with the localized moment (J = 7/2) of Eu2+:4f7 ions. This large MCE over a wide compositional range suggests that the Eu1-xLaxTiO3 series could be useful for magnetic cooling below 40 K.

  11. Den brede, folkelige debat om EU

    DEFF Research Database (Denmark)

    Dosenrode, Søren

    I Danmark er EUropa noget fjernt på trods af, at EU er rammen om dansk politik, både udenrigs og indenrigs. Danmark er medlem af en de facto føderation, men de brede folkelige debater om hvordan EU skal gestaltes har manglet.......I Danmark er EUropa noget fjernt på trods af, at EU er rammen om dansk politik, både udenrigs og indenrigs. Danmark er medlem af en de facto føderation, men de brede folkelige debater om hvordan EU skal gestaltes har manglet....

  12. The EU Approach to International Investment Agreements

    OpenAIRE

    Shehi, Olsi

    2015-01-01

    The study includes an overview of the development of EU foreign investment law before the Lisbon Treaty came to force as well as the consequences after the moment when it became a binding legal document. The main research question of this study is in what way the EU has replaced its Member States in the field of foreign investment. Moreover, this thesis studies the EU foreign investment policy, its regulation in accordance with the Lisbon Treaty as well as analyzes the most important EU draft...

  13. The EU Commission initiative of nuclear liability

    International Nuclear Information System (INIS)

    The EU Commission has recently tackled the difficult issue of nuclear liability in the EU. A public consultation on this topic, via an online questionnaire, has just been closed. The next step would normally be for the Commission to launch a draft piece of legislation. But the situation is complicated, and the Commission may have opened Pandora's box when they decided to deal with nuclear liability. The 'patchwork' of different international conventions and national legislations in force within the EU is on the one hand a very good reason to launch an EU initiative with the aim of harmonization. At the same time, the existing situation poses numerous obstacles to any attempt of finding viable solutions. What is more, the competence of the EU to issue legislation in the field of nuclear liability is doubtful. The article describes the current situation in the EU and explains some options which might be considered by the Commission. Scope and content of any future EU legislation on nuclear liability will be defined by the extent to which the Commission succeeds in obtaining a qualified majority in the Council. In the author's opinion, it is extremely important that any EU legislation does not collide with the existing system of international conventions. Within this framework, there is sufficient room for far-reaching solutions. Some of the more realistic options would be broadly compatible with German nuclear law and their introduction on EU level should be seriously considered. (orig.)

  14. Characteristics of parental rearing pattern in schizophrenics with brilliant school records%自幼学习成绩优异的精神分裂症患者父母教养方式的特点

    Institute of Scientific and Technical Information of China (English)

    赵素银; 王亚卿; 栗克清; 孙秀丽; 张红杰

    2002-01-01

    Objective To explore the features of the parental rearing behavior in schizophrenics with a brilliant school records.Methods 51 schizophrenics in remission with brilliant records were tested by EMBU.36 healthy volunteers were randomized into the controls group.Result Subjects with schizophrenia had abnormal parental rearing behavior,such as overprotection, predilection over intervention and over punishment of parents.Most of them come from peasant family.Conclusion The factors such as abnormal parental rearing behavior probably influence the development of schizophrenics.

  15. Pending Eu Disputes in the Wto: Challenges to Eu Energy Law and Policy

    OpenAIRE

    Perišin, Tamara

    2014-01-01

    In the last several years, there has been a surprising number of energy-related disputes in the WTO. In seven such cases, the EU has taken the role of respondent. There are four different groups of these cases: the first are disputes concerning EU standards on biofuels and other renewable energy sources; the second are disputes on EU Member State measures implementing these EU standards on biofuels and renewables; the third are cases directed against internal market measu...

  16. Learning about the sm from extra dimensions

    International Nuclear Information System (INIS)

    This is a very short review about the possibility that the space-time has more than four dimensions and the implications of these extra dimensions on particle physics. The possibility that the forces of nature live in more than four dimensions gives a new perspective to high-energy physics. If gravity lives in large extra dimensions, the gravitational interaction can become strong at TeV energies. This requires a quantum theory of gravity (strings?) at TeV energies. This possibility allows to test quantum gravity at high-energy colliders such as the LHC. Another implication is that, at distances around a millimeter, we expect gravity to change from its 4-D behavior to a 6-D one. If the extra dimension is warped, the smallness of gravity could be explained by a exponentially small warp factor in the 5-D metric. This scenario does not require the SM fields to be localized on the 4-D boundary and predict KK resonances of TeV masses for any field living in the 5-D bulk. (author)

  17. The 'primacy' and 'direct effect' of EU international agreements

    DEFF Research Database (Denmark)

    Gáspár-Szilágyi, Szilárd

    2015-01-01

    The rules on invoking EU norms before the Court of Justice and Member State courts are at the core of EU constitutional law. International agreements binding on the EU form an integral part of EU law and have primacy over inconsistent secondary EU legislation. Moreover, they also have primacy over...

  18. RARE-EARTH CRYSTAL GROWTH FROM THE VAPOR : Eu/Re AND Eu/W

    OpenAIRE

    Melmed, A.; Maurice, V.; Frank, O.; Block, J

    1984-01-01

    Epitaxial crystal growth of Eu/Re and Eu/W has been studied using Field Emission Microscopy. Nucleation, crystal growth and epitaxial relation-ships are comparatively described and discussed, and a value of the electron work function for poly-facetted Eu has been determined.

  19. Eestimaa.eu kuulub lätlasele ja riik.eu hollandlasele / Mikk Salu

    Index Scriptorium Estoniae

    Salu, Mikk, 1975-

    2006-01-01

    Zone Medias eu domeeninimesid registreeriva Jaanus Puttingu hinnangul on Eesti riik olnud passiivne EL-i domeeninime .eu sisaldavate lehekülgede kaitsmisel, sajad Eestile olulised domeeninimed on juba nii siinsete kui ka piiritaguste inimeste käes. Lisa: Rahvaliit.eu kuulub kinnisvaraportaalile

  20. EU-China Partenariat 2006:Tailor-made Opportunities for SMEs of EU and China

    Institute of Scientific and Technical Information of China (English)

    Franz Jessen

    2006-01-01

    @@ 2006 EU-China Partenariat 2006, the large-scale business-to-business event which will link almost one thousand European and Chinese companies is indeed a highly appropriate way to further enhance the already excellent relations between the EU and China moreover as this is the very year that we are celebrating 30 years of EU-China diplomatic ties.

  1. EU environmental policy and competitiveness

    Directory of Open Access Journals (Sweden)

    Stojanović Boban

    2006-01-01

    Full Text Available Protection of the environment was not a specific importance to the Community although the Treaty of Rome expressly specified that "health, safety environmental protection" shall be based on "a high level of protection". In deciding upon a framework for a European environmental policy, the Community was also responding to increased public awareness of the problem and concerns about the state of the natural and man-made environment. During the past years, competitiveness concerns have dominated the EU policy debate, in the course of which a growing consensus is being developed on the importance of eco-innovations and resource efficiency for EU competitiveness and on the market opportunities they offer. There is an increasing evidence that environmental policy and eco-innovations can promote economic growth, as well as maintain and create jobs, contributing both to competitiveness and employment. Environmental constraints to rapid economic growth are increasingly recognized by countries, leading to a rising awareness of the need for sustainable development. Implementation of an environmental policy however, generates significant implications for competition among countries.

  2. Renewable energies in the EU

    International Nuclear Information System (INIS)

    On January 23, 2008, the European Commission presented proposals in the form of a directive in an effort to give more specific shape to the objective adopted in the spring, i.e. to increase to 20% by 2020 the share of renewable energies in energy consumption in the Community. The proposal was to include legally binding goals for the overall share of renewable energy sources and the share of biofuels in the transport sector. The proposed directive on 'promoting the use of energy from renewable sources' calls upon each member state to ensure that its share of energy from renewable sources in the total energy consumption in 2020 at least corresponds to the target mentioned in Annex I Part A. In addition to the targets, the EU Commission charted a tentative course towards a minimum increase in the share of renewable energies in the period between 2011 and 2020. Finally, the member states are obliged to adopt national action plans. Unfortunately, the EU is missing an important target in its proposed directive: It should establish a framework for harmonized conditions promoting the use of renewable energies. One aspect to be welcomed is the introduction of a system of certificates of origin. It represents the entry, in principle, into a trading system with certificates of origin. The Green Package incorporates a wealth of new approaches. They will have to be tested and, if necessary, supplemented. Something else is evident, however: The directive established the foundations of a vast number of new regulations and red tape. (orig.)

  3. Nuclear levels in 152Eu

    International Nuclear Information System (INIS)

    The transitional nucleus 152Eu has been studied using the (n,e), (n,γ), (nres,γ), (n,γγ), (d,p), (d,t) and (p,d) reactions. The experiments have been performed at nine different laboratories. A model independent level scheme was established including 95 levels below 510 keV and nearly 900 transitions by combination of low energy transitions and reaction data. More than 20 additional levels result from gamma rays and/or charged particle reactions. The level scheme is interpreted in terms of the Nilsson model indicating that 152Eu is a deformed nucleus. Seven rotational bands and Nilsson configurations are established. In additional 27 rotational bands are tentatively or speculatively assugned. Gallagher-Moszkowski splittings are discussed. The neutron binding energy was determined as 6305.2+-0.5 keV. The energy of the 9.3 h O- isomer is 45.599 keV. The lifetimes of four levels were measured. (orig.)

  4. Nuclear levels in 152Eu

    International Nuclear Information System (INIS)

    The transitional nucleus 152Eu has been studied using the (n,e), (n,γ), (nsub(res),γ), (n,γγ), (d,p), (d,t) and (p,d) reactions. The experiments have been performed at nine different laboratories. A model independent level scheme was established including 95 levels below 510 keV and nearly 900 transitions by combination of low energy transitions and reaction data. More than 20 additional levels result from gamma rays and/or charged particle reactions. The level scheme is interpreted in terms of the Nilsson model indicating that 152Eu is a deformed nucleus. Seven rotational bands and Nilsson configurations are established. An additional 27 rotational bands are tentatively or speculatively assigned. Gallagher-Moszkowski splittings are discussed. The neutron binding energy was determined as 6305.2 +- 0.5 keV. The energy of the 9.3 h0- isomer is 45.599 keV. The lifetimes of four levels were measured. (orig.)

  5. Pseudomonas chlororaphis Strain Sm3, Bacterial Antagonist of Pratylenchus penetrans.

    Science.gov (United States)

    Hackenberg, C; Muehlkchen, A; Forge, T; Vrain, T

    2000-06-01

    The interaction of Pseudomonas chlororaphis strain Sm3 and the root-lesion nematode Pratylenchus penetrans was investigated in three separate greenhouse experiments with soils from southern British Columbia, Canada. The bacteria were applied to the roots of strawberry plants and planted in unpasteurized field soils, with natural or supplemented infestation of P. penetrans. Nematode suppression in roots was evident after 6 or 10 weeks in all experiments. Root or shoot growth were increased after 10 weeks in two experiments. Population dynamics of P. chlororaphis Sm3 in the rhizosphere was followed using an antibiotic-resistant mutant of P. chlororaphis Sm3. There was no apparent correlation between bacterial density in the rhizosphere and P. penetrans suppression in strawberry roots and rhizosphere soil, although the soil with the highest nematode reduction also had the largest P. chlororaphis Sm3 population in the rhizosphere. PMID:19270964

  6. Fracture toughness studies in sintered SmCo5 magnets

    International Nuclear Information System (INIS)

    The fracture toughness of sintered SmCo5 magnets were systematically evaluated using both three point bend tests as well as Vickers indentation tests. These results were used for establishing the empirical dimensionless constant (χ) for evaluating indentation fracture toughness in SmCo5 magnets. The anisotropic behaviour of mechanical properties such as hardness, elastic modulus and fracture toughness was also investigated. - Highlights: • A strong anisotropy in the elastic modulus was observed in sintered SmCo5 magnet. • The hardness and fracture toughness did not show any prominent anisotropy. • Brittle cleavage fracture with (10 0) and (10 1) type cleavage planes observed. • Fracture toughness of SmCo5 magnets using Vickers indentation technique studied. • A suitable crack model and dimensionless coefficient value determined

  7. Discovery and characterization of smORF-encoded bioactive polypeptides.

    Science.gov (United States)

    Saghatelian, Alan; Couso, Juan Pablo

    2015-12-01

    Analysis of genomes, transcriptomes and proteomes reveals the existence of hundreds to thousands of translated, yet non-annotated, short open reading frames (small ORFs or smORFs). The discovery of smORFs and their protein products, smORF-encoded polypeptides (SEPs), points to a fundamental gap in our knowledge of protein-coding genes. Various studies have identified central roles for smORFs in metabolism, apoptosis and development. The discovery of these bioactive SEPs emphasizes the functional potential of this unexplored class of biomolecules. Here, we provide an overview of this emerging field and highlight the opportunities for chemical biology to answer fundamental questions about these novel genes. Such studies will provide new insights into the protein-coding potential of genomes and identify functional genes with roles in biology and disease. PMID:26575237

  8. EU SDS. Ingredients for the 2006 revision

    International Nuclear Information System (INIS)

    The current EU strategy for sustainable development comprises three separate components. Collectively, these comprise a broad spectrum of sustainable development goals, ranging from economic growth and more jobs to halting biodiversity loss and attaining millennium development goals such as poverty reduction. On paper, the entire EU Sustainable Development Strategy (EU SDS) reflects the different views on sustainable development. In reality, however, it is the so-called Lisbon strategy, whose goal it is to transform Europe into the most competitive area of the world by 2010, that dominates policy development in the EU. This focus on the Lisbon strategy is motivated by the assumption that competitiveness is a precondition for sustainable development. However, historical trends show that more growth has thus far not contributed to attaining the sustainable development goals for protection of the world's climate and biodiversity. The current EU SDS is not clear about the extent to which such trade-offs are accepted or about how further trade-offs will be avoided. There are also indications that large groups of EU citizens do not necessarily desire the EU to focus on the Lisbon strategy in favour to the other components of the EU SDS. Revising the EU SDS provides an opportunity to explicitly subordinate the Lisbon strategy to the EU SDS by creating one single document, endorsed and monitored by the EU Council, in which all goals for sustainable development are presented integrally. This document should then describe how the focus on Lisbon will contribute to sustainable development and how tradeoffs are dealt with. Trade-offs should ideally be scientifically underpinned and choices based on broad societal consultation

  9. Lattice dynamics of mixed-valent SmS

    International Nuclear Information System (INIS)

    Neutron scattering techniques have been used to measure the phonon dispersion curves for SmS in both the semiconducting and the metallic mixed-valent state. Large softening of the longitudinal acoustic phonon branches was found in the mixed-valent state, particularly for the [111] direction. It is apparent there is a strong coupling between the valence fluctuations and the phonons in the mixed-valent phase of SmS

  10. Concentration mechanism of piezoresistance in SmS

    International Nuclear Information System (INIS)

    Data on the SmS band structure are generalized and supplemented. A concentration model of the piezoresistance effect mechanism is proposed on the base of the data. It is shown that for production of a material with the piezoresistance exceeding the value for SmS at 300 K it is necessary to increase the contribution from 4f levels as far as possible

  11. Electric properties of SmS metallic modification

    International Nuclear Information System (INIS)

    Values of electric conductivity (rho and the Hall parameter Rsub(M) in thin films of samarium sulphide have been measured in semiconductor and metal modifications for the range of temperatures 1.5-300 K. Metal films of SmS with lattice constants 5.7 and 5.63 A are investigated. The temperature dependences of rho and Rsub(H) are theoretically explained. A zone scheme for metal modification of SmS is proposed

  12. Discovery of a metastable Al20Sm4 phase

    International Nuclear Information System (INIS)

    We present an efficient genetic algorithm, integrated with experimental diffraction data, to solve a nanoscale metastable Al20Sm4 phase that evolves during crystallization of an amorphous magnetron sputtered Al90Sm10 alloy. The excellent match between calculated and experimental X-ray diffraction patterns confirms an accurate description of this metastable phase. Molecular dynamic simulations of crystal growth from the liquid phase predict the formation of disordered defects in the devitrified crystal

  13. The Fourth SM Family Neutrino at Future Linear Colliders

    CERN Document Server

    Çiftçi, A K; Sultansoy, S

    2005-01-01

    It is known that Flavor Democracy favors the existence of the fourth standard model (SM) family. In order to give nonzero masses for the first three family fermions Flavor Democracy has to be slightly broken. A parametrization for democracy breaking, which gives the correct values for fundamental fermion masses and, at the same time, predicts quark and lepton CKM matrices in a good agreement with the experimental data, is proposed. The pair productions of the fourth SM family Dirac $(\

  14. Electrochemical degradation of Reactive Brilliant Red K-2BP on Ti/RuTiIrSnMn oxide anode in a batch cell

    Directory of Open Access Journals (Sweden)

    LUO JIANCHENG

    2012-11-01

    Full Text Available Electrochemical degradation of Reactive Brilliant Red K-2BP on Ti/RuTiIrSnMn oxide anode in chloride containing solution was investigated by voltammetry and electrolysis in a batch cell. It is found that the degradation mechanism of K-2BP on Ti/RuTiIrSnMn oxide anode involves an indirect electrocatalytic oxidation, in which K-2BP is oxidized by the electrochemically generated active chlorine. This degradation reaction follows pseudo-first order reaction kinetics. Ti/RuTiIrSnMn oxide exhibits excellent electrocata­lytic activity toward the generation of active chlorine from chloride. Hence, K-2BP can be electrochemically degraded effectively in chloride containing solution. The decolorization efficiency was found to increase with the decrease in pH and with the increase in current density, NaCl concentration, temperature, and flow rate of the solution.

  15. Poly(brilliant green) and poly(thionine) modified carbon nanotube coated carbon film electrodes for glucose and uric acid biosensors.

    Science.gov (United States)

    Ghica, M Emilia; Brett, Christopher M A

    2014-12-01

    Poly(brilliant green) (PBG) and poly(thionine) (PTH) films have been formed on carbon film electrodes (CFEs) modified with carbon nanotubes (CNT) by electropolymerisation using potential cycling. Voltammetric and electrochemical impedance characterisation were performed. Glucose oxidase and uricase, as model enzymes, were immobilised on top of PBG/CNT/CFE and PTH/CNT/CFE for glucose and uric acid (UA) biosensing. Amperometric determination of glucose and UA was carried out in phosphate buffer pH 7.0 at -0.20 and +0.30 V vs. SCE, respectively, and the results were compared with other similarly modified electrodes existing in the literature. An interference study and recovery measurements in natural samples were successfully performed, indicating these architectures to be good and promising biosensor platforms. PMID:25159399

  16. Optimization of Preparation Condition for Meso pores Activated Carbon based on Hevea Brasiliensis Seed Coat for the Removal of Remazol Brilliant Blue R Dye

    International Nuclear Information System (INIS)

    The conditions for the preparation of rubber (hevea brasiliensis) seed coat based activated carbon (RSCAC) treated with NaOH were optimized through response surface methodology (RSM). The effects of three preparation variables: the activation temperature, activation time and NaOH impregnation ratio (IR) on Remazol Brilliant Blue R (RBBR) removal from aqueous solutions and RSCAC yield were investigated. Based on the RSM, two quadratic models were respectively developed to correlate the preparation variables to the RBBR percentage removal and carbon yield. The significant factors on each experimental design response were identified from the analysis of variance (ANOVA). The optimum conditions for RSCAC preparation were obtained by using activation temperature of 700 degree Celsius, activation time of 1.0 h and IR of 1.0, which resulted in 70.82 % of RBBR removal and 24.93 % of RSCAC yield. (author)

  17. Brilliant iridescence of Morpho butterfly wing scales is due to both a thin film lower lamina and a multilayered upper lamina.

    Science.gov (United States)

    Giraldo, M A; Stavenga, D G

    2016-05-01

    Butterflies belonging to the nymphalid subfamily, Morphinae, are famous for their brilliant blue wing coloration and iridescence. These striking optical phenomena are commonly explained as to originate from multilayer reflections by the ridges of the wing scales. Because the lower lamina of the scales of related nymphalid butterflies, the Nymphalinae, plays a dominant role in the wing coloration, by acting as a thin film reflector, we investigated single blue scales of three characteristic Morpho species: M. epistrophus, M. helenor and M. cypris. The experimental data obtained by spectrophotometry, scatterometry and scanning electron microscopy demonstrated that also in the Morpho genus the lower lamina of both the cover and ground scales acts as an optical thin film reflector, contributing importantly to the blue structural coloration of the wings. Melanin pigment has a contrast-enhancing function in a sub-class of ground scales. PMID:27072662

  18. EuCARD Newsletter Issue 2

    CERN Document Server

    Kahle, K L M; Pascoli, S; Palladino, V; Zimmermann, F; Assmann, R; Caldwell, A; Xia, G; Lotov, K; Pukhov, A

    2009-01-01

    European Coordination for Accelerator Research and Development (EuCARD) Newsletter Issue 2: July - September 2009 * A word from the Governing Board Chairman * Amassing the neutrino community * Start by probing the crab cavities * Breaking news for Proton "Surfatrons" * For EuCARD members: Interim reporting

  19. Argentina and Brazil's Relations to the EU

    DEFF Research Database (Denmark)

    Christensen, Steen Fryba

    Analysen diskuterer Argentina og Brasiliens relationer til EU i nyere tid med udgangspunkt i forhandlingerne om en associeringsaftale mellem EU og Mercosur, der igangsattes efter underskrivelsen af en bi-regional rammeaftale i 1995. Fokus er i særlig grad på, hvordan disse relationer bedst forstå...

  20. The "New Politics" of EU's Eastern Enlargement

    DEFF Research Database (Denmark)

    Zank, Wolfgang

    The paper gives an overview of EU's eastern enlargement and draws some theoretical conclusions. In particular, it stresses the point that the EU member states in the process of enlargement have entered a phase of "new politics", characterised by multilateralism, conditionality, help and binding a...

  1. The EU Greenhouse Gas Emissions Trading Scheme

    NARCIS (Netherlands)

    Woerdman, Edwin; Woerdman, Edwin; Roggenkamp, Martha; Holwerda, Marijn

    2015-01-01

    This chapter explains how greenhouse gas emissions trading works, provides the essentials of the Directive on the European Union Emissions Trading Scheme (EU ETS) and summarizes the main implementation problems of the EU ETS. In addition, a law and economics approach is used to discuss the dilemmas

  2. EU Studies in Denmark and Sweden

    DEFF Research Database (Denmark)

    Garski, Salla; Jørgensen, Knud Erik; Manners, Ian

    2012-01-01

    In this brief chapter we take stock of Danish and Swedish scholarship on the European Union (EU). We intend to analyze and evaluate Danish and Swedish scholarship on EU issues, using a mixed methodology integrated into the analysis of this chapter. The method integrates a secondary analysis of...

  3. Towards a Practice Turn in EU Studies

    DEFF Research Database (Denmark)

    Adler-Nissen, Rebecca

    2016-01-01

    This article explores how practice theory can be recruited for the study of European integration. New generations of EU researchers are fascinated by the prospect of leaving the armchair and studying the people and artefacts that make the EU on an everyday level. This article surveys key practice...

  4. The EU and Mass Atrocity Prevention

    DEFF Research Database (Denmark)

    Rodt, Annemarie Peen; de Franco, Chiara

    2015-01-01

    this is yet another example of the EU’s ‘capability-expectation gap’ (Hill 1993), to others it is the result of diverging interpretations of the norm that have come to divide EU member states, particularly after NATO’s intervention in Libya (Brockmeier, Kurtz, and Junk 2014). This paper examines the EU...

  5. Intra-EU Direct Investment and Enlargement

    Directory of Open Access Journals (Sweden)

    Festa Andrea

    2015-03-01

    Full Text Available This paper examines the determinants of the intra-EU direct investment (IDI into the New Member States (NMS using a panel dataset of bilateral capital flows for the period 1993-2013. It is found out by using a simple gravity model that EU membership is the most important determinant. Unlike previous studies including non-EU countries, the distance is insignificant, which is caused by proximity of these countries to one another. A separate analysis focused on subgroups of accession countries gives some evidence that even when size of their economy, distance, institutional quality and EU accession are taken into account, Central European countries receive more IDI than the Baltic and the Balkan states. On the contrary to that, the analysis restricted to the Balkan countries which have joined the EU shows the inexistence of a negative Balkans effect in attracting foreign investment. This finding is relevant because previous studies demonstrate a persistent negative Balkans effect for non-EU Balkan countries and suggests a crucial impact of the EU accession in determining the intra-EU capital flows.

  6. Mobile TV: An assessment of EU policies

    DEFF Research Database (Denmark)

    Tadayoni, Reza; Henten, Anders; Windekilde, Iwona Maria

    The aim of the paper is to discuss EU policies in the area of mobile TV. The European Commission has strongly promoted an EU-wide common policy on mobile TV including the choice of DVB-H as the standard to be used. The paper aims at discussing this policy in view of the technological and market d...

  7. Competitiveness of the EU poultry meat sector

    NARCIS (Netherlands)

    Horne, van P.L.M.; Bondt, N.

    2013-01-01

    EU poultry meat producers have to comply with legislation on environmental protection, animal welfare and food safety. This legislation has increased the production costs of poultry meat. At the same time the EU is negotiating with other countries or groups of countries to liberalise trade in agricu

  8. Evolution of EU Retail Payments Law

    NARCIS (Netherlands)

    Janczuk, Agnieszka

    2015-01-01

    This paper traces the evolution of EU payments law for retail payments, identifying four phases of its development. In spite of the EU’s founding principle of free movement of payments, the first two phases of EU payments law were characterized by negative integration and soft law measures with limi

  9. EU-udvidelse, fusioner og spil

    DEFF Research Database (Denmark)

    Broberg, Morten Petersen

    2004-01-01

    EU-udvidelsen, arbejdskraftens fri bevægelighed, overgangsordning, fusionskontrol, fri bevægelighed for tjenesteydelser, spil, tips, lotto......EU-udvidelsen, arbejdskraftens fri bevægelighed, overgangsordning, fusionskontrol, fri bevægelighed for tjenesteydelser, spil, tips, lotto...

  10. EU enlargement: towards an uncertain future

    NARCIS (Netherlands)

    Boekestijn, A.J.

    2004-01-01

    Never before has the EU been expanded with so many countries at the same time (10), never before was the economic gap between the existing and acceding countries so large, and never before have the existing countries (EU Fifteen) been playing the role of mister Scrooge so convincingly, and never be

  11. 153Sm metallic-hydroxide macroaggregates. An improved preparation for radiation synovectomy

    International Nuclear Information System (INIS)

    A new type of preparation employing 153Sm metallic-hydroxide macroaggregates (153Sm-MHM) for radiation synovectomy was developed. The radiopharmaceutical was prepared by reacting the aqueous solution of 153SmCl3 with sodium borohydride solution in 0.5N NaOH. Microscopic analysis showed that 153Sm-MHM mean particle size was 4μm (range 1-15 μm) avoiding the formation of fine particles (153Sm-hydroxide macroaggregates preparations (153Sm-HM). Also, suspension properties as sedimentation rate, were better for 153Sm-MHM than for 153Sm-hydroxyapatite and 153Sm-HM. Biological studies in normal rabbits demonstrated high retention into de Knee joint space even at 48 h after administration of 153Sm-MHM (>99%). (author)

  12. On separation and purification of 151Sm in connection with creation of 151Sm based sources for NGR spectroscopy

    International Nuclear Information System (INIS)

    The data on 151Sm purification from rare earths, actinides and other elements present in the fraction which is a waste of fission products processing with the use of extraction-chromatography separation technique (hdehp is extracting agent, teflon is the carrier), are presented. Results of γ-spectrometric analysis of purified preparations are considered, as well as some problems of preparing 151Sm-based Moessbauer sources, namely, the choice of the chemical form of active material and source design

  13. AU-EU “Strategic Partnership”

    DEFF Research Database (Denmark)

    Rodt, Annemarie Peen; Okeke, Jide

    2013-01-01

    This article appraises strategic partnership between the African Union (AU) and European Union (EU). It examines the context and nature of AU and EU security relations and explores the conditions under which partnership has a positive impact in this regard. This includes an evaluation of converge......This article appraises strategic partnership between the African Union (AU) and European Union (EU). It examines the context and nature of AU and EU security relations and explores the conditions under which partnership has a positive impact in this regard. This includes an evaluation...... of convergence between the two organizations and its effect or lack thereof on African security. The article concludes that events leading up to and initiatives following the 2007 Joint Africa–European Union Strategy have produced a degree of AU and EU convergence, which has had limited impact on the efficacy...

  14. The Development of EU-Russian Relations

    Institute of Scientific and Technical Information of China (English)

    Zhang Jian

    2008-01-01

    The EU's strategy for Russia since the end of the cold war has to a large extent failed, and the direct consequences are the currently deadlocked EU-Russia relationship. There are three reasons for this: the EU and Russia's respective strength and status relative to each other have been changing since the beginning of this century; the EU's strategy towards Russia has been more fragmenting in recently years; and the American factor. The EU-Russia relations could continue to be in poor shape in the years to come, and it is very likely sometimes even further worsening. But the two sides would refrain from extreme measures and prevent their relations from sliding into real cold war.

  15. Giant low-field magnetocaloric effect in single-crystalline EuTi0.85Nb0.15O3

    Science.gov (United States)

    Roy, S.; Khan, N.; Mandal, P.

    2016-02-01

    The magnetocaloric effect in ferromagnetic single crystal EuTi0.85Nb0.15O3 has been investigated using magnetization and heat capacity measurements. EuTi0.85Nb0.15O3 undergoes a continuous ferromagnetic phase transition at TC = 9.5 K due to the long range ordering of magnetic moments of Eu2+ (4f7). With the application of magnetic field, the spin entropy is strongly suppressed and a giant magnetic entropy change is observed near TC. The values of entropy change ΔSm and adiabatic temperature change ΔTad are as high as 51.3 J kg-1 K-1 and 22 K, respectively, for a field change of 0-9 T. The corresponding magnetic heating/cooling capacity is 700 J kg-1. This compound also shows large magnetocaloric effect even at low magnetic fields. In particular, the values of ΔSm reach 14.7 and 23.8 J kg-1 K-1 for field changes of 0-1 T and 0-2 T, respectively. The low-field giant magnetocaloric effect, together with the absence of thermal and field hysteresis makes EuTi0.85Nb0.15O3 a very promising candidate for low temperature magnetic refrigeration.

  16. Giant low-field magnetocaloric effect in single-crystalline EuTi0.85Nb0.15O3

    International Nuclear Information System (INIS)

    The magnetocaloric effect in ferromagnetic single crystal EuTi0.85Nb0.15O3 has been investigated using magnetization and heat capacity measurements. EuTi0.85Nb0.15O3 undergoes a continuous ferromagnetic phase transition at TC = 9.5 K due to the long range ordering of magnetic moments of Eu2+ (4f7). With the application of magnetic field, the spin entropy is strongly suppressed and a giant magnetic entropy change is observed near TC. The values of entropy change ΔSm and adiabatic temperature change ΔTad are as high as 51.3 J kg−1 K−1 and 22 K, respectively, for a field change of 0–9 T. The corresponding magnetic heating/cooling capacity is 700 J kg−1. This compound also shows large magnetocaloric effect even at low magnetic fields. In particular, the values of ΔSm reach 14.7 and 23.8 J kg−1 K−1 for field changes of 0–1 T and 0–2 T, respectively. The low-field giant magnetocaloric effect, together with the absence of thermal and field hysteresis makes EuTi0.85Nb0.15O3 a very promising candidate for low temperature magnetic refrigeration

  17. Regional security overlaps in EU-Turkey affairs

    OpenAIRE

    Nielsen, Søren Cramer

    2013-01-01

    Throughout this project I analyze how the EU security community operates to secure dependable expectations of peaceful outcomes through its security cooperation with Turkey. This is done by examining EU security overlaps in the Turkey-EU security cooperation, Turkey EU-accession and the EU-Turkish energy security cooperation in the Caspian region with a focus on the Nabucco project. I conclude that the integration of Turkey into the EU security community reveals overlapping security concerns ...

  18. Civil Procedure Harmonization in the EU: Unravelling the Policy Considerations

    OpenAIRE

    Zampia Vernadaki

    2013-01-01

    This article examines the role and significance of the fundamental right of access to justice in the EU (Article 47 CFREU) in the context of the fragmentation of EU law, as evidenced in the area of civil procedure law. As member states’ procedural regimes are considerably divergent, EU institutions intervene, more and more often, to ensure EU law is effectively enforced in an equivalent manner across the EU. This work thus addresses a preliminary question: when should EU institutions provide ...

  19. Humanitarian Issues: the EU Perspective

    Directory of Open Access Journals (Sweden)

    Alberto Navarro

    2000-05-01

    Full Text Available The European Community Humanitarian Office (ECHO and the 15 membercountries of the EU provide more than 50% of the humanitarian aid worldwide: ECHO assigns more than 90% of its budget (only 0.9% of the Community’s total to victims of man-made conflicts. For the author, the experience of ECHO shows the "limits of what is humanitarian": that is, the lack of security for humanitarian workers, the still-to-beoperational Permanent Tribunal for Crimes Against Humanity, the difficult access to refugees, and the fact that humanitarian efforts are not a substitute for policy and, therefore, that humanitarian efforts can not resolve a crisis that has a political origin and solution. The challenges to be faced in the coming years include denouncing the violations of humanitarian values, transferring these values into a future CFSP, organizing humanitarian aid efficiently, combating “donor fatigue” and supporting conflict prevention.

  20. Concentration depolarization of luminescence of Eu3+-doped glasses

    International Nuclear Information System (INIS)

    Experimental study of concentrational depolarization luminescence (CDL) of phosphate and germanate glasses, containing Eu3+ ions, has been carried out. On the basis of three-body self-consistent approximation the theory of CDL is conceived, which takes into account Eu-Eu interaction of higher multipolarities. By comparing the theory with the experiment energy transfer radii for Eu-Eu dipole-dipole, dipole-quadrupole and quadrupole-quadrupole interactions are determined. The attempt to discriminate Eu-Eu interaction types in the studied range of Eu3+ ion concentration change has failed owing to law accuracy of luminescence emittance anisotropy measurement

  1. The 152Sm(p,n) reaction measurements in inverse kinematics

    International Nuclear Information System (INIS)

    Under stellar conditions, low-lying excited states in nuclei are in thermal equilibrium with the ground state. If those excited states undergo β-decays with a higher rate than the ground state, the β-decay half-life of this nucleus is dominated by the excited state. The corresponding life-times are extremely difficult to measure directly on earth, since the excitation occurs mostly via internal transition. For the understanding of the processes occurring during a star collapse, simulations are a crucial tool. To provide a detailed view on those processes and the underlying theoretical models, also to test and improve the simulation networks, information extracted from experiments is needed. Unfortunately, some reactions can not be reproduced directly in laboratories. This applies for example to electron capture processes, which can lead to excited states energetically forbidden on earth. Those reactions are dominated by the so called Gamow-Teller distribution B(GT). If the β-decay occurs via the Gamow-Teller transition, charge exchange reactions allow to investigate the decay strength. In order to verify the method of measuring the B(GT) strength of unstable heavy nuclei via inverse kinematics, the reaction p(152Sm,152Eu)n was used as a test case. This measurement allows to set constraints on the temperature dependent electron capture of 152Eu, which is an important s-process branching point. The s405 experiment took place at the R3B/LAND setup at GSI. A newly developed Low Energy Neutron detector Array (LENA) was used to measure the recoil neutrons, which are emitted at large angles relatively to the incoming beam. Preliminary results are presented.

  2. Controlled synthesis and novel photoluminescence properties of BaTiO3:Eu3+/Eu2+ nanocrystals

    International Nuclear Information System (INIS)

    Highlights: • Tetragonal phase BaTiO3:Eu nanocrystals were successfully synthesized using a hydrothermal method. • Under 398 nm excitation, the emissions from Eu2+ and Eu3+ ions were observed. • The emission band of Eu2+ from BaTiO3:Eu was observed to broaden with increasing Eu concentration. - Abstract: Tetragonal phase BaTiO3:Eu nanocrystals were successfully synthesized using a hydrothermal method and a subsequent calcination treatment. The structures and morphologies of nanocrystals were characterized by X-ray diffraction, Raman spectroscopy, transmission electron microscopy, and scanning electron microscopy. The photoluminescence properties of BaTiO3:Eu were investigated in detail. Under 398 nm excitation, the emissions from Eu2+ and Eu3+ ions were observed, indicating that Eu2+ and Eu3+ ions coexisted in BaTiO3:Eu nanocrystals. Especially, the emission band of Eu2+ from BaTiO3:Eu was observed to broaden with increasing Eu concentration. When the Eu concentration was 0.5 mol%, the 5D0 → 7F0 and 5D1 → 7F0 emissions were observed. In addition, under 537 nm excitation, the emission intensity increased with increasing Eu concentration

  3. Normative power Europe? EU relations with Moldova

    Directory of Open Access Journals (Sweden)

    Tessa de Wekker

    2010-10-01

    Full Text Available This article analyses the extent to which the European Union (EU constitutes a normative power in its relations with Moldova. ‘Normative power Europe’ is examined along three dimensions: (i normative intent; (ii normative process; and (iii normative impact. Our empirical analysis focuses on two norms: democracy and good governance. In addition, we ask how ‘normatively’ the EU has acted regarding a solution to the Transnistrian conflict. On the basis of our three-dimensional framework, we find that EU normative power can be judged as only moderate in EU-Moldovan relations. As for intent, while norms of democracy and good governance seem to play a central role in EU-Moldovan relations, the Union tends to apply double standards in terms of what it expects from (EU Member States and what it asks of Moldova, and also seems to be inconsistent in its policies towards Moldova and Ukraine. In terms of process, the degree of inclusiveness on the part of the Union has not been satisfactory. Neither has the extent of reflexivity, but more recently the Commission seems to have developed a more reflexive behaviour. In regards to impact, while norm changes in Moldova have been modest/moderate, it seems that the EU has substantially contributed to these changes.

  4. Photoluminescence properties of thenardite activated with Eu

    International Nuclear Information System (INIS)

    Na2SO4:Eu phosphors were prepared by heating pure natural thenardite with EuF3 at 900 deg. C for 20 min in air. The photoluminescence (PL) and excitation spectra of as-prepared and γ-ray-irradiated phosphors were observed at 300 K. The PL spectrum under 394 nm excitation consisted of strong narrow bands with peaks at 579, 592, 616, 652, 697 and 741 nm, assigned to the 5D0→7FJ (J=0, 1, 2, ..., 5) transitions, respectively, within Eu3+. The PL spectrum under 340 nm excitation consisted of a broad Eu2+ band with a peak at 435 nm. The excitation spectrum obtained by monitoring the violet luminescence consisted of a weak band with a peak at approximately 261 nm and a broad Eu2+ band with a peak at approximately 338 nm. The relative efficiency of the violet luminescence of the γ-ray-irradiated phosphor at the exposure of 46 kGy increased up to 3.0 times that of the unirradiated phosphor. The enhancement of violet luminescence by γ-ray irradiation was ascribed to the conversion of Eu3+ to Eu2+ in Na2SO4.

  5. Morphological stability of Sm123 superconductor during peritectic solidification from Sm211 + L mixture

    International Nuclear Information System (INIS)

    The interface stability of the Sm 123 superconductor was analyzed in accordance with the constitutional undercooling criterion. As the single-crystal growth of the 123 phase is largely dependent on the growth-interface stability, a quantitative analysis was very much required. From this analysis, it was clarified that the constitutional undercooling must exist in the liquid when the 123 growth interface comes close to a 211 particle during the peritectic solidification. It was also predicted that the larger 211 particle radius, smaller volume fraction of the 211 particles, larger growth rate, or smaller imposed temperature gradient would cause easy occurrence of the constitutional undercooling ahead of the 123 growth interface. Taking into account the nucleation at the L/211 interface just ahead of the 123 growth front due to the constitutional undercooling, the transition of 123 growth from a planar-interface morphology to an equiaxed blocky morphology was investigated quantitatively and qualitatively

  6. Radiation-induced valence changes in Eu-doped phosphors

    CERN Document Server

    Upadeo, S V

    1997-01-01

    Europium impurities can be incorporated in two forms: divalent and trivalent. Phosphors activated by Eu sup 2 sup + or Eu sup 3 sup + find important applications. Exposure to ionizing radiations is known to cause Eu sup 3 sup +->Eu sup 2 sup + conversion. This conversion is important in understanding thermoluminescence and radiophotoluminescence applications. However, there have been no systematic studies on Eu sup 3 sup +reversible Eu sup 2 sup + conversion. Data on Eu sup 3 sup +reversible Eu sup 2 sup + conversion in a large number of europium-doped phosphors are presented in this paper. It is concluded that efficient Eu sup 2 sup + phosphors are suitable hosts for studying Eu sup 3 sup +reversible Eu sup 2 sup + conversion. (author)

  7. Emerging food safety issues: An EU perspective.

    Science.gov (United States)

    McEvoy, John D G

    2016-05-01

    Safe food is the right of every citizen of the European Union (EU). A comprehensive and dynamic framework of food and feed safety legislation has been put in place and the EU's executive arm - the European Commission - is responsible for ensuring that the EU member states apply food law consistently. Similarly, the Commission plays an important role in ensuring that imported food meets the EU's stringent food safety standards. Consumer perceptions of unsafe food tend to focus on acute outbreaks of bacterial or viral origin. In recent years there have been a number of diverse food crises associated with fraudulent activity which may (e.g. melamine in dairy products in China) or may not (e.g. the horse meat scandal in the EU) represent a genuine food safety risk. Well publicized incidents of chronic exposure to chemical contamination in the EU (e.g. dioxins in meat and mycotoxins in nuts) have required robust coordinated policy responses from the Commission. Despite the decreasing incidence of non-compliant residues of veterinary medicinal products and banned substances in animal products, EU consumers are increasingly concerned about the use of such products in food-producing animals, including in the context of the build-up of antimicrobial resistance in animals and transfer to humans. The Commission plays a key role in coordination of the EU member states' responses to such incidents, in risk management, and in preparation for emerging issues. This paper focuses on how the EU as a whole has dealt with a number of food crises, and what can be learned from past incidents. Copyright © 2016 John Wiley & Sons, Ltd. PMID:27443205

  8. Expectations for LHC from Naturalness: Modified vs. SM Higgs Sector

    CERN Document Server

    Casas, J A; Hidalgo, I

    2006-01-01

    Common lore has it that naturalness of electroweak breaking in the SM requires new physics (NP) at Lambda < 2-3 TeV, hopefully within the reach of LHC. Moreover the Higgs should be light (m_h < 219 GeV) to pass electroweak precision tests (EWPT). However one should be prepared for "unexpected" (although admittedly unpleasant) results at LHC, i.e. no NP and/or a heavy Higgs. We revisit recent attempts to accommodate this by modifying the SM Higgs sector (using 2-Higgs-doublet models). We find that these models do not improve the naturalness of the SM, and so they do not change the expectations of observing NP at LHC. We also stress that a heavy SM Higgs would not be evidence in favour of a modified Higgs sector, provided certain higher order operators influence EWPT. On the other hand, we show that NP can escape LHC detection without a naturalness price, and with the pure SM as the effective theory valid at LHC energies, simply if the cut-off for top loops is slightly lower than for Higgs loops.

  9. Public investment and the EU fiscal framework

    OpenAIRE

    Alessandro Turrini

    2004-01-01

    It is often claimed that the introduction of the EU rules-based fiscal framework of the Maastricht Treaty and the Stability and Growth Pact was responsible for a decline in public investment shares in EU countries. Proposals have also been made in recent times in favour of a revision of the EU fiscal framework in such a way to grant special treatment to public capital expenditures (e.g., by amending it with a ‘golden rule'). This paper analyses empirically the relation between the introduct...

  10. Stavovi makedonskih poljoprivrednika prema pristupu EU

    OpenAIRE

    Kotevska, Ana; Martinovska-Stojcheska, Aleksandra; Öhlmér, Bo; Dimitrievski, Dragi

    2013-01-01

    Makedonija je država kandidat za ulazak u EU od 2005. Integracijski proces će nedvojbeno imati utjecaj na makedonsku ekonomiju, posebice na područuju poljoprivrede. Do sada nisu vršena značajnija istraživanja u vezi stavova i namjera poljoprivrednika u odnosu na integracije i pristup EU. U tom smislu, svrha ovoga rada jest pružiti uvid u stavove makedonskih poljoprivrednika i njihovih reakcija u kontekstu pristupa EU te potencijalne politike i promjena na tržištu. Nadalje, predmet istraživanj...

  11. The Politics of Judging EU Law

    DEFF Research Database (Denmark)

    Mayoral Diaz-Asensio, Juan Antonio

    attitudinal factors affecting the judicial enforcement of EU law. This is done by posing new questions, for instance, the relevance of national judges’ preferences towards EU legal order and institutions, as well as by evaluating and reviewing the impact of political and legal institutions on their behaviour......, like governments and national high courts, play a prominent role in shaping national courts’ incentives for the application of EU law, as they may use their institutional power to circumvent judges’ decisions. Finally, it reviews the strategic use of European instruments such as the CJEU precedent and...

  12. SmMYC2a and SmMYC2b played similar but irreplaceable roles in regulating the biosynthesis of tanshinones and phenolic acids in Salvia miltiorrhiza.

    Science.gov (United States)

    Zhou, Yangyun; Sun, Wei; Chen, Junfeng; Tan, Hexin; Xiao, Ying; Li, Qing; Ji, Qian; Gao, Shouhong; Chen, Li; Chen, Shilin; Zhang, Lei; Chen, Wansheng

    2016-01-01

    Salvia miltiorrhiza Bunge, which contains tanshinones and phenolic acids as major classes of bioactive components, is one of the most widely used herbs in traditional Chinese medicine. Production of tanshinones and phenolic acids is enhanced by methyl jasmonate (MeJA). Transcription factor MYC2 is the switch of jasmontes signaling in plants. Here, we focused on two novel JA-inducible genes in S. miltiorrhiza, designated as SmMYC2a and SmMYC2b, which were localized in the nucleus. SmMYC2a and SmMYC2b were also discovered to interact with SmJAZ1 and SmJAZ2, implying that the two MYC2s might function as direct targets of JAZ proteins. Ectopic RNA interference (RNAi)-mediated knockdown experiments suggested that SmMYC2a/b affected multiple genes in tanshinone and phenolic acid biosynthetic pathway. Besides, the accumulation of tanshinones and phenolic acids was impaired by the loss of function in SmMYC2a/b. Meanwhile, SmMYC2a could bind with an E-box motif within SmHCT6 and SmCYP98A14 promoters, while SmMYC2b bound with an E-box motif within SmCYP98A14 promoter, through which the regulation of phenolic acid biosynthetic pathway might achieve. Together, these results suggest that SmMYC2a and SmMYC2b are JAZ-interacting transcription factors that positively regulate the biosynthesis of tanshinones and Sal B with similar but irreplaceable effects. PMID:26947390

  13. Study on cellular survival adaptive response induced by low dose irradiation of 153Sm

    International Nuclear Information System (INIS)

    The present study engages in determining whether low dose irradiation of 153Sm could cut down the responsiveness of cellular survival to subsequent high dose exposure of 153Sm so as to make an inquiry into approach the protective action of adaptive response by second irradiation of 153Sm. Experimental results indicate that for inductive low dose of radionuclide 153Sm 3.7 kBq/ml irradiated beforehand to cells has obvious resistant effect in succession after high dose irradiation of 153Sm 3.7 x 102 kBq/ml was observed. Cells exposed to low dose irradiation of 153Sm become adapted and therefore the subsequent cellular survival rate induced by high dose of 153Sm is sufficiently higher than high dose of 153Sm merely. It is evident that cellular survival adaptive response could be induced by pure low dose irradiation of 153Sm only

  14. X-ray absorption study of intermediate valence in Sm1-xGdxS alloys

    International Nuclear Information System (INIS)

    X-ray absorption near edge structure (XANES) measurements above LH edge of Sm are employed to study the intermediate valence in Sm1-xGdxS(0.05 ≤ x ≤ 0.30) alloys. The split white lines at the LH edge of Sm are used to determine the average valence of SM in these alloys. The internal chemical pressure generated by substitution of smaller trivalent cation, Gd, for Sm drives the latter to a higher valence. Sm valence increases smoothly first and then undergoes an abrupt increment at a critical concentration of 16 at.% of Gd. At concentration of Gd higher than 16 at. % the increase in Sm valence is smooth and small. The data for Sm average valence for Sm1-xGdxS alloys obtained by LH absorption edges shows fair agreement with other techniques

  15. Luminescence characteristics of doubly doped KLuS.sub.2./sub.:Eu,RE (RE = Pr, Sm, Ce)

    Czech Academy of Sciences Publication Activity Database

    Havlák, Lubomír; Jarý, Vítězslav; Rejman, M.; Mihóková, Eva; Bárta, J.; Nikl, Martin

    2015-01-01

    Roč. 41, Mar (2015), s. 94-97. ISSN 0925-3467 R&D Projects: GA ČR GA13-09876S; GA TA ČR TA01011017 Institutional support: RVO:68378271 Keywords : luminescence * white LED * energy transfer * rare earth doping * CIE coordinates Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.981, year: 2014

  16. Composition dependence of luminescence of Eu and Eu/Tb doped silicate glasses for LED applications

    DEFF Research Database (Denmark)

    Zhu, C.F.; Chaussedent, S.; Liu, S.;

    2013-01-01

    The Eu and Eu/Tb doped silicate glasses are good candidates for light emitting diode (LED) applications. But the optical performance of these glasses is sensitive to variations in chemical composition. In this paper we report our recent findings about the effect of addition of minor components such...... results show that the asymmetry factor and luminescence lifetimes of as-prepared materials are dependent on composition. White fluorescence is achieved in Eu/Tb co-doped glasses, which can be attributed to the simultaneous generation of red, green and blue wavelengths from Eu3+ and Tb3+ ions. The...... variation of the excitation wavelength can tune the emission spectra as well as Commission Internationale de L’Eclairage (CIE) chromaticity coordinates of Eu/Tb co-doped glasses for specific applications. The energy transfer from Tb3+ to Eu3+ ions is investigated by analyzing fluorescence spectra and decay...

  17. EU POLICY ON EDUCATION FUNDING

    Directory of Open Access Journals (Sweden)

    Elena Cristina PANA

    2014-04-01

    Full Text Available On average, EU countries allocate 6.4% of total public expenditure for the direct support of the public sector at all levels of education. In view of a more rational allocation of resources seriously diminished by the crisis there are made efforts to identify educational areas considered problematic in terms of accessing various education programs. This paper presents pre-school funding policies and policies to support families with preschool and school age children in the European Union through a comparative analysis of the focus group type. There are also presented concrete ways of achieving that family support such as tax cuts, family allowances or by taking into account certain factors in order to establish fees. In all countries where taxes are paid for pre-compulsory education (ISCED A there is a mechanism by which parental contributions can be adjusted according to the means available taking into account criteria such as family income, number of children, family status (children who live with one parent geographic area, etc.

  18. The EU model evaluation group

    International Nuclear Information System (INIS)

    The model evaluation group (MEG) was launched in 1992 growing out of the Major Technological Hazards Programme with EU/DG XII. The goal of MEG was to improve the culture in which models were developed, particularly by encouraging voluntary model evaluation procedures based on a formalised and consensus protocol. The evaluation intended to assess the fitness-for-purpose of the models being used as a measure of the quality. The approach adopted was focused on developing a generic model evaluation protocol and subsequent targeting this onto specific areas of application. Five such developments have been initiated, on heavy gas dispersion, liquid pool fires, gas explosions, human factors and momentum fires. The quality of models is an important element when complying with the 'Seveso Directive' requiring that the safety reports submitted to the authorities comprise an assessment of the extent and severity of the consequences of identified major accidents. Further, the quality of models become important in the land use planning process, where the proximity of industrial sites to vulnerable areas may be critical. (Copyright (c) 1999 Elsevier Science B.V., Amsterdam. All rights reserved.)

  19. The effects of Eu-concentrations on the luminescent properties of SrF{sub 2}:Eu nanophosphor

    Energy Technology Data Exchange (ETDEWEB)

    Yagoub, M.Y.A.; Swart, H.C.; Noto, L.L. [Department of Physics, University of the Free State, PO Box 339, Bloemfontein ZA9300 (South Africa); O’Connel, J.H.; Lee, M.E. [Department of Physics and Centre for HRTEM, Nelson Mandela Metropolitan University, PO Box 77000, Port Elizabeth ZA6031 (South Africa); Coetsee, E., E-mail: CoetseeE@ufs.ac.za [Department of Physics, University of the Free State, PO Box 339, Bloemfontein ZA9300 (South Africa)

    2014-12-15

    SrF{sub 2}:Eu nanophosphors were successfully synthesized by the hydrothermal method. The structure of the nanophosphors was investigated with x-ray diffraction. The average crystallite size calculated using the Scherrer equation was in the range of 7.0 nm. The photoluminescence of Eu doped as-prepared SrF{sub 2} nanophosphors were studied using different excitation sources. The samples showed emission from both the Eu oxidation states, Eu{sup 2+} and Eu{sup 3+}. At low Eu concentrations the emission from Eu{sup 2+} centered at 416 nm was more dominant. While the narrow band of Eu{sup 3+} emission intensity increased with an increase in the Eu concentration. High resolution x-ray photoelectron spectroscopy results indicated that the Eu was indeed in both Eu{sup 2+} and Eu{sup 3+} valance states. The presence of Eu{sup 2+} and Eu{sup 3+} in the system largely enhanced the response of the Eu{sup 3+} under ultraviolet excitation. The time of flight-secondary ion mass spectrometry results suggested that the energy transfer between two ions was likely to occur. The relative photoluminescence intensity of the Eu{sup 2+} rapidly decreased with an increasing laser beam irradiating time. This result would make the current Eu{sup 2+} doped SrF{sub 2} samples unsuitable candidates for several applications, such as white light-emitting diodes and wavelength conversion films for silicon photovoltaic cells. - Highlights: • SrF{sub 2}: Eu nanophosphors were successfully synthesised (hydrothermal technique). • PL and XPS results showed enhanced absorption response of Eu{sup 3+} UV excitation. • Eu concentrations more than 5 mol% improved fluorescence emission. • TOF-SIMS results suggested that the energy transfer from Eu{sup 2+} to Eu{sup 3+} is dominant.

  20. Cephalopod research and EU Directive 2010/63/EU: requirements, impacts and ethical review

    OpenAIRE

    Smith, J. A.; Andrews, P. L. R.; Hawkins, P; Louhimies, S.; De Ponte, G.; Dickel, L.

    2013-01-01

    For the first time, European Union legislation on animal research and testing has extended its scope to include invertebrate species the Class Cephalopoda. EU Directive 2010/63/EU, which was due to be implemented in Member States 1 January 2013, covers all "live cephalopods" used in scientific procedures that are likely to cause the animals adverse effects such as "pain, suffering, distress or lasting harm".This paper examines practical implications of the new EU law for cephalopod research. ...

  1. When Liminals Interact: EU-Hamas Relations

    DEFF Research Database (Denmark)

    Pace, Michelle

    , Eurocentric categories that dominate International Relations (IR). By analysing Hamas and the EU as liminals this article demonstrates how far certain collective discourses and non-state identities can go in challenging pre-existing categories on which the social order of international relations relies. Hamas...... does not ‘fit’ into pre-existing social categories of the social order in world politics. The EU does not fit into the system of states in international relations, although it attempts, in part, to behave like one at a supranational level. Empirically, both the EU and Hamas are able to exercise power......This article engages with the concept of liminality by focusing on two, theoretically and empirically dubious categories: the EU and Hamas. Theoretically, both are in-between the traditional categories we use to make sense of the world and as such they challenge state-based, Westphalian...

  2. Liminality in EU-Hamas relations

    DEFF Research Database (Denmark)

    Pace, Michelle; Pallister-Wilkins, Polly

    , Eurocentric categories that dominate International Relations (IR). By analysing Hamas and the EU as liminals this article demonstrates how far certain collective discourses and non-state identities can go in challenging pre-existing categories on which the social order of international relations relies. Hamas...... does not ‘fit’ into pre-existing social categories of the social order in world politics. The EU does not fit into the system of states in international relations, although it attempts, in part, to behave like one at a supranational level. Empirically, both the EU and Hamas are able to exercise power......This article engages with the concept of liminality by focusing on two, theoretically and empirically dubious categories: the EU and Hamas. Theoretically, both are in-between the traditional categories we use to make sense of the world and as such they challenge state-based, Westphalian...

  3. EuCARD final project report

    CERN Document Server

    Koutchouk, J P

    2014-01-01

    After four years of activity, EuCARD has most of its objectives fulfilled, with some new objectives added and a few others on excellent tracks while requiring additional time. The management has been active in reinforcing the collaborative links between partners and projects, contributing to the preparation of FP7-EuCARD2, initiating FP7-HiLumi-LHC Design Study, to favour sustained collaborations beyond EuCARD. An out-of-contract network has been successfully launched on laser plasma acceleration, to combine forces between accelerator, laser and plasma communities. Communication and dissemination activities have led to two highlights: Accelerating News, an accelerator R&D newsletter initiated by EuCARD and now common to all FP7 accelerator projects (over 1000 subscribers) and a series of monographs on accelerator sciences that is progressively finding its public. The scientific networks have more than fulfilled their initial objectives: roadmaps are defined for neutrino facilities, submitted to the Europe...

  4. Competitiveness of the EU egg industry

    NARCIS (Netherlands)

    Horne, van P.L.M.

    2012-01-01

    Eierproducenten in de EU moeten voldoen aan bepaalde wetgeving inzake milieubescherming, dierenwelzijn en voedselveiligheid. Vanaf 1 januari 2012 werd het houden van kippen in traditionele kooien verboden en moesten eierproducenten overstappen op verrijkte kooien of alternatieve huisvesting. Het res

  5. EU and Tourism Development: Bark or Bite?

    DEFF Research Database (Denmark)

    Halkier, Henrik

    2010-01-01

    In the absence of major programmes to strengthen the quality and competitiveness of European destinations, the role of the EU in tourism development has often been seen as fairly limited. Despite this, spill-overs or side effects from adjoining policy areas with extensive European regulation or...... intervention can be equally important, and the paper examines key aspects of the EU's role in tourism development in order to discuss to what extent the traditional interpretation of a passive actor of little consequence should be modified or even discarded. Drawing upon European and Nordic documentary sources...... as well as existing specialist literature, the text first examines the development of an EU policy statement on tourism, and then two areas of EU policy - competition policy and regional development - are analysed with a view to establishing side-effects in European and Nordic destinations. It is...

  6. Electrochemical preparation of Al–Sm intermetallic compound whisker in LiCl–KCl Eutectic Melts

    International Nuclear Information System (INIS)

    Highlights: • The reduction process of Sm(III) was investigated in LiCl–KCl melt on an aluminum electrode at 773 K. • Al–Sm alloy with different phase structure (Al2Sm and Al3Sm) was prepared by potentiostatic electrolysis on an aluminum electrode with the change of electrolytic potentials and time in LiCl–KCl–SmCl3 melts. • Al − Sm alloy containing whiskers (Al4Sm) was obtained by potentiostatic electrolysis (−2.10 V) on an aluminum electrode for 7 hours with the change of electrolytic temperature and cooling rate in LiCl–KCl–SmCl3 (16.5 wt. %) melts. The results from micro–hardness test and potentiodynamic polarization test show the micro hardness and corrosion property are remarkably improved with the help of Al–Sm intermetallic compound whiskers. - Abstract: This work presents the electrochemical study of Sm(III) on an aluminum electrode in LiCl–KCl melts at 773 K by different electrochemical methods. Three electrochemical signals in cyclic voltammetry, square wave voltammetry, open circuit chronopotentiometry, and cathode polarization curve are attributed to different kinds of Al–Sm intermetallic compounds, Al2Sm, Al3Sm, and Al4Sm, respectively. Al–Sm alloy with different phase structure (Al2Sm and Al3Sm) could be obtained by the potentiostatic electrolysis with the change of electrolytic potentials and time. Al–Sm alloy containing whiskers (Al4Sm) was obtained by potentiostatic electrolysis (−2.10 V) on an aluminum electrode for 7 hours with the change of electrolytic temperature and cooling rate in LiCl–KCl–SmCl3 (16.5 wt. %) melts. The XRD and SEM&EDS were employed to investigate the phase composition and microstructure of Al–Sm alloy. SEM analysis shows that lots of needle−like precipitates formed in Al–Sm alloy, and their ratios of length to diameter are found to be greater than 10 to 1. The TEM and electron diffraction pattern were performed to investigate the crystal structure of the needle

  7. Crystal grains alignment of SmBCO film by advanced TFA-MOD method

    International Nuclear Information System (INIS)

    We grew SmBa2Cu3O7-y (SmBCO) films on LaAlO3 (LAO) single crystalline substrates by an advanced TFA-MOD method and discussed the effects of process conditions such as oxygen partial pressure in the crystallization step on the crystal grains alignment of SmBCO film. Oxygen partial pressure affected strongly on the orientation of SmBCO film. Formation of a-axis crystal grains of the SmBCO was suppressed, and, at the same time, c-axis crystal grains of the SmBCO increased with decreasing the oxygen concentration

  8. Synthesis ZnS:Sm thin films from volatile complex compounds

    Science.gov (United States)

    Ivanova, Elena N.; Kovalevskaya, Yu. A.; Bessreguenev, Valentin G.

    2002-11-01

    Deposition and characterization of ZnS, Sm2S3 and ZnS:Sm films are described. The films have been prepared by chemical vapor deposition using new volatile complex compounds, dithiocarbamates of Zn and Sm, as precursors. Characterization includes X-ray diffraction, chemical analysis of the film composition, ellipsometry and spectrophotometry. It has been shown that at relatively low temperatures (about 380 °C) monophase crystalline Sm2S3 films can be fabricated. Doping of ZnS by Sm with dopant concentration up to 2 at. % has been achieved. Effects of Sm doping on structural and optical properties of the film are presented.

  9. Measuring and Explaining Regulatory Reform in the EU

    DEFF Research Database (Denmark)

    Citi, Manuele; Justesen, Mogens Kamp

    2014-01-01

    EU are analysed. Using time-series analysis of count data, evidence is found that the number of winning coalitions in the Council and the size of EU membership have a significant impact on regulatory reform in the EU. By contrast, the ideological composition of the EU's legislative bodies is not...

  10. Preparation of EuSe nanoparticles from Eu(III) complex containing selenides

    International Nuclear Information System (INIS)

    The EuSe nanoparticles were prepared by the thermal reduction of Europium nitrate with new organic selenium compound, tetraphenylphosphonium diphenylphosphinediselenide (PPh4)(Se2P(C6H5)2), for the first time. EuSe nanoparticles were identified by the X-ray diffraction (XRD), the transmission electron microscope (TEM) and the energy dispersive X-ray spectroscopy (EDX) measurements. The average size of the EuSe nanoparticles was found to be 19 nm. The energy gap in EuSe nanoparticles of 19 nm was estimated by edge of absorption band, giving the energy gap of 1.86 eV

  11. Critical neutron scattering from the Heisenberg ferromagnets EuO and EuS

    DEFF Research Database (Denmark)

    Als-Nielsen, Jens Aage; Dietrich, O. W.; Passell, L.

    1972-01-01

    The magnetic neutron scattering from isotopically enriched powders of EuO and EuS near their Curie temperatures has been studied. Results of the critical exponents for the static properties in standard notation were * Thumbnail image of Spin wave scattering at T......The magnetic neutron scattering from isotopically enriched powders of EuO and EuS near their Curie temperatures has been studied. Results of the critical exponents for the static properties in standard notation were * Thumbnail image of Spin wave scattering at T...

  12. Application of the sum peak method to study changes in the K-capture probability to the 1086 keV level and perturbed angular correlation parameters in the decay of 152Eu

    International Nuclear Information System (INIS)

    The sum peak method has been applied to electron capture probability changes to the 1086 keV level in the decay of 152Eu in the different environments, e.g. ethylenediaminetetraacetic acid (EDTA), bovine serum albumin (BSA) and hydrochloric acid (HCl). An attempt is also made to determine the effect of chemical environment on the directional correlation coefficient of the 1409-122 keV γ-γ cascade in 152Eu →152Sm decay. A change of G22 is found in the different chemical forms. (author) 25 refs.; 2 figs.; 3 tabs

  13. EU countries in NATO. Part I

    OpenAIRE

    Cristina ANTONOAIE

    2016-01-01

    According to the Clingendael Report – New Treats, New EU and NATO responses – from July 2015 issued by the Netherlands Institute of International Relations, the changes in the security environment of Europe ask for a prudent response from the part of EU and NATO member countries. Since the adoption of NATO’s new Strategic Concept at the Lisbon Summit in November 2010, which identifies the need for the Alliance to address emerging security challenges, several new areas of cooper...

  14. Gender mainstreaming and EU climate change policy

    OpenAIRE

    Allwood, Gill

    2014-01-01

    This article uses feminist institutionalism to examine how gender mainstreaming has been sidelined in European Union (EU) climate change policy. It finds that, with a few exceptions largely emanating from the European Parliament's Committee on Women's Rights and Gender Equality, EU responses to climate change are gender-blind. This is despite the Treaty obligations to gender mainstream policy in all areas and despite the intersections between climate change and development policy, which is re...

  15. EU polluting emissions: an empirical analysis

    OpenAIRE

    Álvarez, Francisco; Contestabile, M.; Gómez, C; Gustavo A. Marrero; Puch, Luis A.

    2016-01-01

    We provide an empirical study of the evolution of emissions of some specific air pollutants on a panel of EU member states from 1990 to 2000, and we relate observed patterns to macroeconomic performance. The ratio pollution emission to GDP, so-called emission intensity, has decreased over the period considered in most EU member states. However, a non-parametric analysis reveals that the relative positions of different countries in terms of GDP growth and reduction of emissions have remained b...

  16. EU's Plight, Changes and Their Impacts

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ On the stages of international politics and economics, the European Union (EU) is a key player, and its development has great impact on the global political and economic setup. In 2005, the "constitutional crisis" occurred in the EU, the fruits of European economic integration, which once was thought irreversible, like the Single European Market and the united currency of euro, now also might fall apart.

  17. The EU Trade Policy Towards China

    OpenAIRE

    Patrick Messerlin; Jinghui Wang

    2008-01-01

    Designing its trade policy towards China, Europe should exert extreme foresightedness. Rather than to be trapped in bilateral trade balance conflicts (economically meaningless and politically hopeless), the EU should push for objectives that are attractive to its own interests, and to Chinese interests - China's economy is already too large to be influenced exclusively from outside. In this perspective, the paper offers five main proposals. * Concerning trade in goods, the EU should aim at a ...

  18. Accounting Integration issues of EU Member States

    OpenAIRE

    Aldona Kamela-Sowinska

    2014-01-01

    The aim of this article is to discuss the dilemmas over the integration of accounting in EU member states. The dilemma could be divided into the following main groups. Dilemma of the user of financial statements. This dilemma consists in determining for whom the integration of accounting in EU is crucial, and who is the intended beneficiary of integration. Dilemma arising from the lack of theoretical framework for drafting directives and standards: the accounting paradigm assuming that accoun...

  19. Vejen Til Brexit - Et EU uden Storbritannien?

    OpenAIRE

    Wilche, Christian

    2016-01-01

    The following master thesis is looking at the current situation of the United Kingdoms, and their relationship with the EU up till June 2016. The thesis is seeking to understand the reasoning behind and the contributing factors for the choice, by David Cameron, to call for a referendum on UK’s continued membership of the EU, also called Brexit. This is done through the usage of Historical Institutionalism, Liberal Intergovernmentalism and Intergovernmentalism, in an attempt to get insight...

  20. EU Civilian Crisis Management and Organisational Learning

    OpenAIRE

    Bossong, Raphael

    2012-01-01

    Commentators and policy-makers stress the need to learn the lessons of EU civilian crisis management. Yet despite numerous case studies mission performance, we know little about the EU's overall capacity for such learning. The first part of this article outlines a theoretical framework for analysing organisational learning in the context of peace operations. It recommends focusing on administrative reform and conceptual development in Brussels, and lists various factors that are expected to f...

  1. Position of microenterprises in EU economy

    Directory of Open Access Journals (Sweden)

    Zbigniew Gołaś

    2010-01-01

    Full Text Available The article shows the results of the analysis of positions of microenterprises in European Union (EU economy. The results show that microenterprises make up the most numerous group of economic subjects in EU, however their importance in economy is diversified. In terms of job places their significance is comparable to the biggest enterprises, however in terms of income generation, value added, labour productivity and financial efficiency the position of microenterprises is conclusively the weakest.

  2. Etableringsret og investorbeskyttelse i EU's nye handelsaftaler

    DEFF Research Database (Denmark)

    Sørensen, Karsten Engsig

    2015-01-01

    Artiklen gennemgår den regulering af etableringsret og investorbeskyttelse, der findes i de frihandelsaftaler, EU har indgået med Sydkorea, Canada og Singapore, samt i den aftale, der p.t. forhandles med USA (TTIP).......Artiklen gennemgår den regulering af etableringsret og investorbeskyttelse, der findes i de frihandelsaftaler, EU har indgået med Sydkorea, Canada og Singapore, samt i den aftale, der p.t. forhandles med USA (TTIP)....

  3. FISCAL DISCIPLINE WITHIN THE EU: COMPARATIVE ANALYSIS

    Directory of Open Access Journals (Sweden)

    SORIN CELEA

    2013-12-01

    Full Text Available This paper focuses on the analysis of the convergence indicators relative to fiscal area in the EU; subsequent to a description of the main peculiarities of the convergence criteria, the reseach develops a critical analysis on a comparative perspective of the actual values of fiscal convergence indicators registered in EU countries compared with the reference values of the indicators, with emphasis on the differences between emerging and developed countries.

  4. Composite Procedures in the EU Administrative LAW

    OpenAIRE

    Hofmann, Herwig

    2009-01-01

    Administrative procedures in the sphere of EU law are increasingly integrated. In many cases, both Member State authorities as well as EU institutions and bodies contribute to a single procedure, irrespective of whether the final decision is taken on the national or the European level. Such procedures are referred to here as composite procedures. This chapter is about the legal problems resulting from such procedural administrative integration.

  5. EU standarder for isoleringsmaterialer af cellulosefibre

    DEFF Research Database (Denmark)

    Hansen, Ernst Jan de Place

    2003-01-01

    Resume af rapport om status for udarbejdelsen af EU standarder for isoleringsmateriale af cellulosefibre, udarbejdet af Landsforeningen Økologisk Byggeri under Energistyrelsens udviklingsprogram "Miljø- og arbejdsmiljøvenlig isolering"......Resume af rapport om status for udarbejdelsen af EU standarder for isoleringsmateriale af cellulosefibre, udarbejdet af Landsforeningen Økologisk Byggeri under Energistyrelsens udviklingsprogram "Miljø- og arbejdsmiljøvenlig isolering"...

  6. Sodium samarium tetrakis(polyphosphate, NaSm(PO34

    Directory of Open Access Journals (Sweden)

    Dan Zhao

    2010-07-01

    Full Text Available NaSm(PO34 has been prepared by solid state reactions. It belongs to type II of the structural family of MILnIII(PO34 compounds (MI = alkali metal and LnIII = rare earth metal and is composed of ∞(PO3n]n− polyphosphate chains with a repeating unit of four PO4 tetrahedra. The chains extend parallel to [100] and share O atoms with irregular SmO8 polyhedra, forming a three-dimensional framework which delimits tunnels occupied by Na+ cations in a distorted octahedral environment.

  7. Aechmea rodriguesiana (L. B. Sm.) L. B. Sm. (Bromeliaceae) uma espécie endêmica da Amazônia brasileira Aechmea rodriguesiana (L. B. Sm.) L. B. Sm. (Bromeliaceae), an endemic species of the Brazilian Amazon

    OpenAIRE

    Gardene Maria de Sousa; Maria das Graças Lapa Wanderley

    2007-01-01

    Aechmea subgênero Chevaliera (Gaudich. ex Beer) Baker está representado na Amazônia brasileira pelas espécies A. fernandae (E. Morren) Baker e A. rodriguesiana (L. B. Sm.) L. B. Sm., sendo a última restrita para esta região. A. rodriguesiana se caracteriza pelas flores dispostas em racemo de espigas, com brácteas florais ovais, margens inteiras, envolvendo o ovário e pelas pétalas alvas e cuculadas. O presente trabalho apresenta a complementação da descrição e ilustrações desta espécie. São a...

  8. Piezoresistivity of SmS at room temperature

    International Nuclear Information System (INIS)

    Dependence of the longitudinal coefficient of piezoresistance of unaixial compression (π11) on conductivity electron concentration (n) at room temperature for SmS monocrystals was studied. Comparative analysis of the obtained experimental results with calculated dependences of π11 on n was carried out. It was concluded as a result of the analysis that the value of piezoresistance effect is specified by contribution of electrons activated from 4f-levels of Sm ions and from impurity donor levels to charge carrier concentration

  9. Pressure-induced elastic softening of SmS

    International Nuclear Information System (INIS)

    Elastic constant measurements under hydrostatic pressure show that, as semiconducting SmS approaches its type O isostructural transition from the larger-volume side, the bulk modulus decreases but not in the catastrophic manner characteristic of the intermediate-valence Smsub(1-x)Ysub(x)S alloys near the transition. In both the semiconducting SmS and the intermediate-valence metallic-state Smsub(1-x)Ysub(x)S alloys the contribution from cubic terms to the elastic strain energy is small. (author)

  10. The optical phonon spectrum of SmFeAsO

    OpenAIRE

    Marini, C.; Mirri, C.; Profeta, G; Lupi, S.; Di Castro, D; Sopracase, R.; Postorino, P.; Calvani, P.; Perucchi, A.; Massidda, S.; Tropeano, G. M.; Putti, M.; Martinelli, A.; A. Palenzona(INFM-LAMIA/CNR, Dipartimento di Chimica e Chimica Industriale); Dore, P.

    2008-01-01

    We measured the Raman and the Infrared phonon spectrum of SmFeAsO polycrystalline samples. We also performed Density Functional Theory calculations within the pseudopotential approximation to obtain the structural and dynamical lattice properties of both the SmFeAsO and the prototype LaFeAsO compounds. The measured Raman and Infrared phonon frequencies are well predicted by the optical phonon frequencies computed at the Gamma point, showing the capability of the employed ab-initio methods to ...

  11. The neutron EDM in the SM: a review

    International Nuclear Information System (INIS)

    We review the status of the electric dipole moment (EDM) of neutron in the Standard Model (SM). The contributions of the strong and electroweak interactions are discussed separately. In each case the structure of Lagrangian and the sources of CP violation are specified, and subsequently calculational details are given. These two contributions to the neutron EDM exist in any extension of the SM including supersymmetry, two-doublet models as well as models with more than three generations of fermions. We briefly discuss the status of the neutron EDM in such extensions and give the relevant literature. (author)

  12. Studies concerning the preparation of the 153Sm complex with EDTMP (ethylenediaminetetra methylenephosphonic acid) and other 153Sm complexes with other phosphonates, at room temperature

    International Nuclear Information System (INIS)

    This work presents a study on the preparation of the complexes 153Sm - EDTMP, 153Sm - HEDP, 153Sm - NTMP, 153Sm - DTPMP and 153Sm - HDTMP at room temperature. The preparation of the complex 153Sm - HDTMP, under heating (70 - 72 deg C), was also studied. Several factors affecting the 153Sm - EDTMP complexing yields were studied, due to its importance for use in Nuclear Medicine. These factors were: the molar ratio [ligand] / [metal], the ligand concentration and the incubation time of the mixture ligand-metal. The preparation of this complex, in low molar ratios, was also investigated. A study of the 153Sm - EDTMP concerning the 'in vitro' stability, when this complex was prepared in low radioactive concentrations was performed. A study on the temperature influence on its degradation, when this complex was obtained in higher radioactive concentrations, was also performed. The preparation of the complexes 153Sm - HEDP, 153Sm - NTMP, 153Sm - DTPMP and 153Sm - HDTMP was investigated by preparing the complexes in two situations: high molar ratio and ligand concentration and low molar ratio and ligand concentration. The 'in vitro' stability of each complex, obtained in low radioactive concentration was studied. In the specific case of the complex 153Sm - HDTMP, its biological distribution in mice was performed. All the complexes were investigated by high performance liquid chromatography (HPLC) and its complexing yields were determined by other three chromatographic processes: ionic exchange, thin layer chromatography (TLC - SG) and paper chromatography. The chromatographic processes were performed by association with specific radiochemical techniques. This work also presents a comparative study on the chromatograms obtained by thin layer chromatography (TLC - SG) and paper chromatography, when evaluated by the technique of cutting the strips into pieces and the chromatograms performed directly on a radiochromatography. The shape of the chromatograms and Rf values of 153

  13. Effects of Sm on the grain refinement, microstructures and mechanical properties of AZ31 magnesium alloy

    Energy Technology Data Exchange (ETDEWEB)

    Sun, Ming [National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China); School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China); Hu, Xiaoyu [National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China); Peng, Liming, E-mail: plm616@sjtu.edu.cn [National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China); State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240 (China); Fu, Penghuai [National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China); Peng, Yinghong [School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China)

    2015-01-03

    The effects of samarium (Sm) on the grain refinement, microstructures and mechanical properties of as-cast AZ31 (Mg–3Al–1Zn–0.3Mn) magnesium (Mg) alloy have been investigated. Very serious grain coarsening happens when Sm content is between 0.16% and 1.18%. This is due to both the reactions between Al and Sm which reduce the constitutional undercooling effect and the lack of Al{sub 2}Sm heterogeneous nuclei. However, excellent grain refinement effect is achieved at Sm content above 2.17%, which is because the in-situ formed Al{sub 2}Sm particles significantly promote heterogeneous nucleation. The main phases in AZ31–xSm alloys include α-Mg, β-Mg{sub 17}Al{sub 12}, Al{sub 11}Sm{sub 3} and Al{sub 2}Sm. The Mg{sub 17}Al{sub 12} phase is gradually suppressed by the increase in Sm content, and the Al{sub 2}Sm is present at a higher Sm content. Because of grain refinement strengthening and secondary phase strengthening effects, the room temperature tensile property of AZ31–3.13Sm alloy has the optimal value of YS78.7MPa–UTS216.7MPa-EL13.6%.

  14. Moessbauer spectroscopy of 151Eu and 153Eu. Applications to structural chemistry and electronic properties of rare-earth compounds

    International Nuclear Information System (INIS)

    The decrease of the 151Eu isomer shift on hydrogenation of a dilute EuPd alloy (2.5at% Eu) is discussed in term of the volume effect on the charge density at the nucleus. It is shown from 153Eu Moessbauer spectroscopy in rare earth titanates that a vibrational anisotropy lead to the observation of a Goldanskii-Karyagin effect

  15. The Competitiveness of Croatian Export to EU Markets

    OpenAIRE

    Buturac, Goran; Gržinić, Jasmina

    2009-01-01

    This paper explores the competitiveness of Croatian export to EU market. At the very beginning of the paper, by analyzing the results of regression model the basic differences among the value of Croatian exports in EU countries are to be explained. The differences in the size of Croatian export among EU countries could be well explained by the geographical distance between Croatia and individual EU countries, as well as, by the GDP of the EU countries. Croatia has positive trade balance with ...

  16. How Could Scotland Protect its EU Links After Brexit?

    OpenAIRE

    Hughes, Kirsty

    2015-01-01

    It is often presumed that Scotland will continue to be part of the EU, either through a UK-wide vote to remain in the EU referendum or by joining the EU after a successful second independence referendum, writes Kirsty Hughes. She argues, however, that it is possible that Scotland could find itself outside the EU following a vote to leave, and that it should consider how to develop a differentiated relationship with the EU distinct from England.

  17. Sustainable development in the EU : Redefining and operationalizing the concept

    OpenAIRE

    2014-01-01

    Although sustainable development plays an important role in EU law, neither EU law nor EU policy clearly explains what the concept means and how it must be put into practice. Policy-makers, NGOs, politicians and businesses do, however, need guidance on sustainable development for the purpose of good policy-making, for effectively holding the EU accountable, and for the design of CSR programmes. To that end, this article will first explain the guidance which EU law and policy already offer on ...

  18. Chinese investments in the EU

    Directory of Open Access Journals (Sweden)

    Haico EBBERS

    2010-12-01

    Full Text Available China’s investments in the European Union are much lower than what you may expect given the economic size of both entities. These relatively low investments in Europe are a combination of priority and obstacles. The priority for investments is clearly in Asia, Africa and Latin America. This regional pattern is heavily influenced by the need to solve the resource shortage in the medium and long term. The investments in Europe and the United States are mostly market seeking investments. Research specifically focused on Chinese M&A abroad comes to the same conclusion. The success rate of Chinese M&A abroad is much lower than what we see with respect to American or European investments abroad. In this paper, we examine why Chinese firms are facing more difficulties in the European Union than in other regions. The paper focuses on Chinese M&A as proxy for total foreign direct investments abroad. By looking at the factors that have been documented as influencing the level of M&A abroad, it becomes clear that Chinese firms in Europe are hindered by many factors. For example, the trade between China and the EU is relatively low, the institutional quality is lower compared to the United States, there is less experience with respect to Europe and relatively many deals relate to State Owned Enterprises (SOE which makes the deal sensitive. So it is logical that Chinese investments are not very high in Europe. However, the research makes clear that the obstacles for Chinese investments in Europe are disappearing step by step. In that sense, we expect a strong increase of Chinese investments in Europe in the future.

  19. Adsorption behavior and mechanism of reactive brilliant red X-3B in aqueous solution over three kinds of hydrotalcite-like LDHs

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Can, E-mail: zhangcan19882007@hotmail.com; Yang, Shaogui, E-mail: yangdlut@126.com; Chen, Hongzhe, E-mail: liuyijichen@126.com; He, Huan, E-mail: hhdew@nju.edu.cn; Sun, Cheng, E-mail: envidean@nju.edu.cn

    2014-05-01

    Highlights: • We examined the adsorption behavior of X-3B over three kinds of LDHs. • Various characterizations were employed to study the adsorption mechanism. • The work reveals the dominant mechanism is hydrogen binding. • The –SO{sub 3} is the interaction site proved in this report exactly. - Abstract: Three kinds of layered double hydroxides (LDHs), including Ni/Al-LDH, Mg/Al-LDH and Co/Al-LDH, were adopted in this research to study the adsorption process of reactive brilliant red X-3B. Factors affecting adsorption such as contact time and temperature were investigated. The adsorption kinetic data fit well into the pseudo-second-order model, while the adsorption isotherm followed the Langmuir model. The thermodynamic tests indicated spontaneous and exothermic nature of X-3B adsorption. In order to examine the adsorption mechanism, pH effect was investigated and adsorbents and adsorption products of Ni/Al- and Mg/Al-LDHs were characterized further by several physicochemical techniques in view of their relative large capacity. The pH effect tests illustrated that electrostatic reaction and hydrogen bonding between dye molecules and LDH layers may be the major mechanisms involved in adsorption. The FT-IR analysis revealed that there was ion exchange during the adsorption process. The XPS, TG, and NMR experiments further proved that the hydrogen bonding between the adsorbent and adsorbate played the dominant role in this process and the –SO{sub 3} was the interaction site.

  20. Comparative study on using carbon or nitrogen limited medium to culture white rot fungi for reactive brilliant red dye K-2BP decolotization under non-sterile conditions

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    In order to explore ways for the application of white rot fungus in dye effluent treatment under non-sterile conditions, experiment on decolorization of reactive brilliant red was carried out, employing nitrogen-limited and carbon-limited medium with C/N ratio of 56/2.2 and 28/44 (in mmol/L), respectively. The results showed that the decolorization rate reached 92% while culturing white rot fungus with nitrogen-limited medium; however, the decolorization process ended in carbon-limited medium (n(C)/n(N) = 28/44) because of bacterial contamination. In addition, pH rose up to 9.31 after 4 d of decolorization, which was caused by bacterial contamination in the carbon-limited system. Therefore, it is concluded that nitrogen-limited medium can inhibit bacterial growth to some extent while carbon-limited medium is more easily contaminated by bacteria. Nitrogen-limited medium is more suitable in culture of white rot fungus for decolorization of reactive dye. Medium with the ability of inhibiting yeast growth should be developed by adjusting other components of nitrogen-limited medium.

  1. Cempedak durian as a potential biosorbent for the removal of Brilliant Green dye from aqueous solution: equilibrium, thermodynamics and kinetics studies.

    Science.gov (United States)

    Dahri, Muhammad Khairud; Lim, Linda B L; Mei, Chan Chin

    2015-08-01

    Cempedak durian peel (CDP) was used to remove Brilliant Green (BG) dye from aqueous solution. The adsorption of BG onto CDP was studied as functions of contact time, pH, temperature, ionic strength and initial concentration. In order to understand the adsorption process and its mechanisms, adsorption isotherm and kinetics models were used. The experiments were done under optimized 2-h contact time and ambient pH. Adsorption study showed that the Langmuir model best fitted with experimental data, and the maximum adsorption capacity was determined as 0.203 mmol g(-1) (97.995 mg g(-1)). Adsorption kinetics followed the pseudo 2nd order model, and intraparticle diffusion is involved but not as the rate-limiting step while Boyd model suggests that film diffusion might be in control of the adsorption process. Fourier transform infrared (FTIR) analysis showed that OH, C=O, C=C and NH functional groups might be involved in the adsorption of BG onto CDP. Thermodynamic study suggested that the adsorption of BG onto CDP is endothermic with ΔH (o) value of 12 kJ mol(-1) and adsorption is feasible. Regeneration of CDP's ability to remove BG was also studied using three different washing solutions. NaOH (0.1 M) was not only sufficient to be used to regenerate CDP's ability to remove BG but also improved its adsorption capability. PMID:26231977

  2. Treatment of Remazol Brilliant Blue Dye Effluent by Advanced Photo Oxidation Process in TiO2/UV and H2O2/UV reactors

    Directory of Open Access Journals (Sweden)

    M. Verma

    2008-01-01

    Full Text Available Advanced oxidation processes involving TiO2/UV and H2O2/UV were evaluated for their potential use in decolorization of textile dye effluents. A coil photo reactor, consisting of UV radiation source and a spiral coil coated with TiO2, was used to treat synthetic effluent of Remazol Brilliant Blue dye. The TiO2 coating was performed using the sol-gel technique. The effects of UV radiation, TiO2 coatings and dye concentration were studied and the results were compared to dye treatment involving H2O2. The maximum dye removal efficiencies were 7.3, 12.2 and 12.5 % for uncoated, single coat and dual coat of TiO2, respectively. The decolorization efficiency was inversely related to dye concentration of the effluent. The treatments with UV only, TiO2 only, UV+TiO2, H2O2 only and UV+H2O2 resulted in color reduction of 7.6, 2.3, 12.5, 4.1 and 99.9 % respectively. The maximum decolorization occurred in ≤ 100 min in all cases. The temperature varied from 29.2 to 54.7°C for UV+TiO2 treatment and no change in reactor temperature was observed when UV was not used.

  3. MnCl2 and MgCl2 for the removal of reactive dye Levafix Brilliant Blue EBRA from synthetic textile wastewaters: An adsorption/aggregation mechanism

    International Nuclear Information System (INIS)

    Two divalent cation-based coagulants, magnesium chloride and manganese chloride, were used to treat synthetic textile wastewaters containing the azo-dye pigment Levafix Brilliant Blue EBRA. The jar-tests were performed in the presence or absence of auxiliary dyeing chemicals. They proved that (i) both divalent cation-based coagulants were effective in the treatment of those alkaline effluents, (ii) better performances in terms of color removal, residual turbidity, and settled volume, were achieved with manganese chloride, and (iii) the presence of dyeing auxiliaries significantly increases the required coagulant demand for treating the textile effluent. The dye removal mechanisms were investigated by combining observations of freeze-dried sediments with transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy and selected area electron diffraction, Fourier transform infrared spectroscopy, adsorption experiments, and aggregates size measurements with a laser sizer under cyclic shear conditions. The results show that brucite (Mg(OH)2) particles are formed when applying MgCl2 to the textile wastewaters, whereas a mixture of feitknechite (β-MnOOH) and hausmannite (Mn3O4) is obtained when using MnCl2. More poorly crystallized particles are formed in presence of auxiliary dyeing chemicals. The adsorption experiments suggested that the azo-dye pigment adsorbs onto the surface of precipitating phases, whereas the aggregation dynamics indicated that a charge-neutralization mechanism underlies the formation of aggregates. The dye removal is then consistent with a precipitation/adsorption mechanism.

  4. Searches for Beyond SM Higgs Boson at the Tevatron

    Energy Technology Data Exchange (ETDEWEB)

    Safonov, A.; /Texas A-M

    2006-05-01

    In the following, the authors describe preliminary results of searches for non-SM higgs bosons at the CDF and D0 experiments. Both experiments use data obtained in p{bar p} collisions at the Tevatron at {radical}s = 1.96 TeV.

  5. Aechmea rodriguesiana (L. B. Sm. L. B. Sm. (Bromeliaceae uma espécie endêmica da Amazônia brasileira Aechmea rodriguesiana (L. B. Sm. L. B. Sm. (Bromeliaceae, an endemic species of the Brazilian Amazon

    Directory of Open Access Journals (Sweden)

    Gardene Maria de Sousa

    2007-01-01

    Full Text Available Aechmea subgênero Chevaliera (Gaudich. ex Beer Baker está representado na Amazônia brasileira pelas espécies A. fernandae (E. Morren Baker e A. rodriguesiana (L. B. Sm. L. B. Sm., sendo a última restrita para esta região. A. rodriguesiana se caracteriza pelas flores dispostas em racemo de espigas, com brácteas florais ovais, margens inteiras, envolvendo o ovário e pelas pétalas alvas e cuculadas. O presente trabalho apresenta a complementação da descrição e ilustrações desta espécie. São apresentados dados de distribuição geográfica, hábitats e fenológicos.Aechmea subgenus Chevaliera (Gaudich. ex Beer Baker, is represented in the Brazilian Amazon by two species: A. fernandae (E. Morren Baker and A. rodriguesiana (L. B. Sm. L. B. Sm., the latter being restricted to this region. A. rodriguesiana is characterized by flowers arranged on racemes of spikes, oval floral bracts with entire margins that completely surround the ovary, and by cuculate white petals. The present work has as main goal to complement the description and illustration of this species, exclusive to the Brazilian Amazon, allowing its recognition and conservation. Data on geographical distribution, habitat, and phenology are presented.

  6. Biofuels, Biolubricants and the BioPreferred(SM) Program

    Science.gov (United States)

    The BioPreferred(SM) Program is a U.S. government initiative intended to encourage the development and widespread use of biofuels, biolubricants, and other biobased products in the U.S. The program consists of the preferred procurement and the voluntary labeling programs. Companies wishing to have t...

  7. Xe-135 and Sm-149 Isotopic Evolution Analysis Xesamo code

    International Nuclear Information System (INIS)

    In this report the time evolution analysis of the nuclides concentration Xe-135 and Sm-149 as a function of the neutron flux is carried out. The neutron flux may be any function of time. It is analyzed as well the reactivity changes associated with the xenon and samarium concentration variations. (Author) 5 refs

  8. Direct digital control of the WWR-SM research reactor

    International Nuclear Information System (INIS)

    The report describes the computerized control system of a 5 MW WWR-SM research reactor. The system is realized as a multilayer decision hierarchy where simple subsystems control the power and the outlet temperature of the reactor under the supervision of a self-organization layer. The structure of the program system and the hardware configuration are presented. (author)

  9. 31 CFR 208.5 - Availability of the ETA SM.

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 2 2010-07-01 2010-07-01 false Availability of the ETA SM. 208.5 Section 208.5 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) FISCAL SERVICE, DEPARTMENT OF THE TREASURY FINANCIAL MANAGEMENT SERVICE MANAGEMENT OF FEDERAL...

  10. Prospects of Higgs and SM measurements at HL-LHC

    CERN Document Server

    Savin, Alexander

    2015-01-01

    After succesful startup of the LHC scientific program that has led to discovery of the Higgs boson it is time to make plans for the future. The high luminosity LHC (HL- LHC) project is discussed, plans for possible Higgs and SM measurements are reviewed.

  11. Metastable magnetic polaron effects in SmS

    International Nuclear Information System (INIS)

    The resistivity, Hall effect and magnetoresistance of nominally stoichiometric black phase SmS single crystals were measured at pressures up to 4 kbar, for temperatures ranging from 1.2 to 300K. Metastable effects in the free electron population were observed below 20K. These effects are explained by a bound magnetic polaron concept

  12. Plantens små kraftværker

    DEFF Research Database (Denmark)

    Møller, I.M.; Bykova, N.V.

    2001-01-01

    mitokondrien. Mitokondrier er plantecellernes små kraftværker, som forsyner plantecellen med energi i form af ATP (adenosintriphosphat) og byggesten til syntese af cellens bestanddele. For at forstårespirationen må vi have en grundig forståelse af mitokondrien og dens proteiner. Den viden kan igen føre til, at...

  13. Sm-Nd-age of gashunnursky dike complex (Mongolia)

    International Nuclear Information System (INIS)

    By the Sm-Nd dating method is determined the age of the samples of diabasic porphyrites dikes from gashunnursky dike complex (Mongolia). The obtained value of investigated samples ages equal 321 +- 79 millions of years agrees well with the age of the third tectonic-metamorphic cycle metamorphism to which had been undergone the gashunnursky complex dikes

  14. Influence of binding characteristics of 153Sm-complexes to BSA on their bone uptake

    International Nuclear Information System (INIS)

    The bone uptake in normal mice and adsorption on bone model materials (hydroxyapatite and type I collagen) of 153Sm-NTMP, 153Sm-HEDTMP, 153Sm-DCTMP, 153Sm-EDTMP, 153Sm-DTPMP and 153Sm-DTPA are compared, and then the binding characteristics of these 153Sm-complexes to bovine serum albumin (BSA) are investigated. It is found that there is a discrepancy between the bone uptake and the adsorption on bone model materials, and that the binding characteristics of these 153Sm-complexes to BSA play an important role in the process of their bone uptake. Also, the binding characteristics are applied to explain the discrepancy successfully

  15. Investigation of spectroscopy and the dual energy transfer mechanisms of Sm3+-doped telluroborate glasses

    Science.gov (United States)

    Van Do, Phan; Tuyen, Vu Phi; Quang, Vu Xuan; Hung, Le Xuan; Thanh, Luong Duy; Ngoc, Tran; Van Tam, Ngo; Huy, Bui The

    2016-05-01

    The absorption, luminescence, Raman spectra and lifetimes of Sm-doped alkali telluroborate glasses (TB glasses) TB:Sm3+ have been investigated. The dual energy transfers including energy transfer between Sm3+ - Sm3+ pairs and Sm3+ - non-bridging oxygen (NBO) intrinsic defects were investigated. The concentration quenching of luminescence intensity was explained by the non-radiative energy transfer between the Sm3+ ions through the cross-relaxation mechanism. The decay curves are single exponentials with low concentrations (lower 0.10 mol%) and become non-exponentials at higher concentrations. The non-exponential decay curves are fitted to the Inokuti and Hirayama model to give the energy transfer parameters between Sm3+ ions. The dominant interaction mechanism for energy transfer process is dipole-dipole interaction. The energy transfer induced Sm3+ photoluminescence enhancement in tellurite glass was experimentally studied and confirmed.

  16. Impacts of the EU Biofuel directive implementation on the EU food supply chain

    NARCIS (Netherlands)

    Tabeau, A.A.; Meijl, van H.; Banse, M.A.H.; Woltjer, G.B.

    2009-01-01

    The paper investigates the impact of the EU Biofuels Directive (BFD) on the EU agri-food supply chain using the computable general equilibrium model of the world economy named LEITAP. LEITAP is an extended version of the Global Trade Analysis Project (GTAP) model including an improved land market mo

  17. Impact of the EU Biofuels Directive on the EU food supply chain

    NARCIS (Netherlands)

    Tabeau, A.A.; Banse, M.A.H.; Meijl, van H.; Woltjer, G.B.

    2011-01-01

    This article analyses the impact of the EU Biofuels Directive (BFD) on the EU agri-food supply chain using a computable general equilibrium model of the world economy, LEITAP. LEITAP is an extended version of the Global Trade Analysis Project (GTAP) model including improved land market modeling, sub

  18. Transmission electron microscopy study on defect structure of SmS monocrystals

    International Nuclear Information System (INIS)

    Monocrystalline SmS samples were studied by the method of transmission electron microscopy. A large quantity of Sm3S4 depositions of micron size as shown to be present as a rule in SmS monocrystals grown nowdays. Colonies of precipitates and full dislocation loops were revealed in some samples. Obtained are data on the structure of metal layer appearing on the surface of SmS crystals at its mechanical polishing

  19. Thermoluminescence characteristics of Sm3+ doped NaYF4 crystals

    Indian Academy of Sciences (India)

    M V Ramana Reddy; Ch Gopal Reddy; K Narasimha Reddy

    2007-02-01

    Thermoluminescence (TL) characteristics of NaYF4 crystals doped with Sm3+ have been studied after -ray irradiation. Dependence of luminescence efficiency on Sm3+ concentration and radiation dose has been measured and possible applications of NaYF4 : Sm3+ as a novel phosphor for TL dosimetry have been investigated. The efficiency of 0.3 mole% Sm3+ doped NaYF4 crystal has been found to be maximum and comparable with commercial thermoluminescence dosimetric (TLD) materials.

  20. Perceived Distributive Fairness of EU Transfer Payments, Outcome Favorability, Identity, and EU-Tax Compliance.

    Science.gov (United States)

    Hartner, Martina; Rechberger, Silvia; Kirchler, Erich; Wenzel, Michael

    2011-01-01

    In a representative UK study (N = 1000) the link between distributive fairness perceptions, outcome favorability, identity, and tax compliance was researched in the context of European transfer payments. Results showed that both forms of tax compliance (i.e., individual and collective EU-tax compliance) were influenced by perceived distributive fairness judgments of EU transfer payments. Fairness itself was related to perceived outcome favorability (i.e., whether their own nation benefits from the EU in financial as well as socio-political terms). Additionally, national identifiers (i.e., people identifying with their own nation, but not with Europe) perceived EU membership as unbeneficial in financial as well as in socio-political terms and thus considered the transfer payments as less fair. Dual identifiers (i.e., people identifying with their own nation and with Europe) perceived the socio-political outcomes from EU membership as more beneficial and thus evaluated the transfer payments as fairer. PMID:21412442