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Sample records for dysprosium 171

  1. Dysprosium magneto-optical traps

    CERN Document Server

    Youn, Seo Ho; Ray, Ushnish; Lev, Benjamin L

    2010-01-01

    Magneto-optical traps (MOTs) of highly magnetic lanthanides open the door to explorations of novel phases of strongly correlated matter such as lattice supersolids and quantum liquid crystals. We recently reported the first MOTs of the five high abundance isotopes of the most magnetic atom, dysprosium. Described here are details of the experimental technique employed for repumper-free Dy MOTs containing up to half a billion atoms. Extensive characterization of the MOTs' properties---population, temperature, loading, metastable decay dynamics, trap dynamics---is provided.

  2. On polymorphism of dysprosium trichloride

    Energy Technology Data Exchange (ETDEWEB)

    Zakiryanova, Irina D.; Khokhlov, Vladimir A.; Salyulev, Alexander B.; Korzun, Iraida V. [RAS Ural Branch, Ekaterinburg (Russian Federation). Institute of High-Temperature Electrochemistry

    2015-07-01

    For the first time, the structure of crystalline DyCl{sub 3} over a wide temperature range from room temperature to melting point was studied by Raman spectroscopy. The phonon modes (cm{sup -1}) of dysprosium trichloride (monoclinic crystal lattice of AlCl{sub 3} type, Z = 4, CN = 6) at room temperature are 257 (A{sub 1g}), 201 (E{sub g}), 112 (E{sub g}), 88 (A{sub 1g}), and 63 (E{sub g}). The monoclinic structure of the crystalline DyCl{sub 3} C{sub 2h}{sup 3} symmetry was found to remain constant over the studied temperature range. No polymorphic transformation in the solid state was detected. Gravimetry, calorimetry, and mass spectrometry have been used in addition to support the conclusions made on the basis of Raman spectroscopic data.

  3. Resonance ionization spectroscopy in dysprosium

    Energy Technology Data Exchange (ETDEWEB)

    Studer, D., E-mail: dstuder@uni-mainz.de; Dyrauf, P.; Naubereit, P.; Heinke, R.; Wendt, K. [Johannes Gutenberg-Universität Mainz, Institut für Physik (Germany)

    2017-11-15

    We report on resonance ionization spectroscopy (RIS) of high-lying energy levels in dysprosium. We developed efficient excitation schemes and re-determined the first ionization potential (IP) via analysis of Rydberg convergences. For this purpose both two- and three-step excitation ladders were investigated. An overall ionization efficiency of 25(4) % could be demonstrated in the RISIKO mass separator of Mainz University, using a three-step resonance ionization scheme. Moreover, an extensive analysis of the even-parity 6sns- and 6snd-Rydberg-series convergences, measured via two-step excitation was performed. To account for strong perturbations in the observed s-series, the approach of multichannel quantum defect theory (MQDT) was applied. Considering all individual series limits we extracted an IP-value of 47901.76(5) cm{sup −1}, which agrees with the current literature value of 47901.7(6) cm{sup −1}, but is one order of magnitude more precise.

  4. The dysprosium-tin phase diagram

    Energy Technology Data Exchange (ETDEWEB)

    Eremenko, V.N.; Bulanova, M.V.; Martsenjuk, P.S. (I.N. Frantsevich Inst. for Problems of Materials Science, Kiev (Ukraine))

    1992-12-07

    The dysprosium-tin phase diagram was established by means of differential thermal, X-ray and microscopic analyses of 22 alloys. Seven intermetallic compounds were found to exist in the system. Dy[sub 5]Sn[sub 3] melts congruently at 1870 degC, and undergoes a polymorphous transformation at 1823 [+-] 6 degC. The intermetallics Dy[sub 5]Sn[sub 4], Dy[sub 11]Sn[sub 10], DySn, Dy[sub 4]Sn[sub 5], DySn[sub 2], DySn[sub 3] are formed peritectically at 1712 [+-]11, 1605 [+-]12, 1208 [+-]3, 1166 [+-]7, 1138 [+-]3 and 747 [+-]6 degC respectively. DySn[sub 3] exists in a narrow temperature range, in two polymorphous modifications. The transformation [beta]-DySn[sub 3] [yields] [alpha]-DySn[sub 3] occurs at 608 [+-] 12 degC, and at 499 [+-]2 degC [alpha]-DySn[sub 3] decomposes to DySn[sub 2] and the tin-rich melt. The dysprosium-rich eutectic crystallizes at 1204 [+-]10 degC and contains 13 at.% tin. The solid-state solubility of tin in dysprosium is about 3 at.%, and that of dysprosium in tin is negligible.

  5. Towards a new measurement of parity violation in dysprosium

    CERN Document Server

    Leefer, N; Antypas, D; Budker, D

    2014-01-01

    The dysprosium parity violation experiment concluded nearly 17 years ago with an upper limit on weak interaction induced mixing of nearly degenerate, opposite parity states in atomic dysprosium. While that experiment was limited in sensitivity by statistics, a new apparatus constructed in the interim for radio-frequency spectroscopy is expected to provide significant improvements to the statistical sensitivity. Preliminary work from the new PV experiment in dysprosium is presented with a discussion of the current statistical sensitivity and outlook.

  6. Dysprosium Modification of Cobalt Ferrite Ionic Magnetic Fluids

    Institute of Scientific and Technical Information of China (English)

    JIANG Rong-li; LIU Yong-chao; GENG Quan-rong; ZHAO Wen-tao

    2005-01-01

    Dysprosium composite cobalt ferrite ionic magnetic fluids were prepared by precipitation in the presence of Tri-sodium citrate. Influence of dysprosium modification on magnetic property is studied. The result shows that magnetic response toward exterior magnetic field can be improved by adding Dy3+. Studies also show that the increase of reaction temperature may improve the modification effect of dysprosium. By adding dysprosium ions, the average diameter of the magnetic nanoparticles will be decreased evidently. It is clear that the particles appear as balls, Cobalt ferrite with sizes of 12-15 nm, rare earth composite cobalt ferrite with sizes of 6-8 nm.

  7. Can a dysprosium shortage threaten green energy technologies?

    NARCIS (Netherlands)

    Hoenderdaal, S.; Tercero Espinoza, L.; Marschneider-Weidemann, F.; Crijns - Graus, Wina

    2013-01-01

    Dysprosium, one of the various rare earth elements, is currently for more than 99% mined in China. As China is reducing its exports, new mining projects outside of China are needed to sustain supply and meet future demands. Dysprosium is mainly used in permanent magnets to retain the magnet's streng

  8. Phenalenyl-based mononuclear dysprosium complexes

    Directory of Open Access Journals (Sweden)

    Yanhua Lan

    2016-07-01

    Full Text Available The phenalenyl-based dysprosium complexes [Dy(PLN2(HPLNCl(EtOH] (1, [Dy(PLN3(HPLN]·[Dy(PLN3(EtOH]·2EtOH (2 and [Dy(PLN3(H2O2]·H2O (3, HPLN being 9-hydroxy-1H-phenalen-1-one, have been synthesized. All compounds were fully characterized by means of single crystal X-ray analysis, paramagnetic 1H NMR, MALDI-TOF mass spectrometry, UV–vis spectrophotometry and magnetic measurements. Both static (dc and dynamic (ac magnetic properties of these complexes have been investigated, showing slow relaxation of magnetization, indicative of single molecule magnet (SMM behavior. Attempts to synthesize sublimable phenalenyl-based dysprosium complexes have been made by implementing a synthetic strategy under anhydrous conditions. The sublimed species were characterized and their thermal stability was confirmed. This opens up the possibility to deposit phenalenyl-based lanthanides complexes by sublimation onto surfaces, an important prerequisite for ongoing studies in molecular spintronics.

  9. Anisotropy in the Interaction of Ultracold Dysprosium

    CERN Document Server

    Kotochigova, Svetlana

    2011-01-01

    The nature of the interaction between ultracold atoms with a large orbital and spin angular momentum has attracted considerable attention. It was suggested that such interactions can lead to the realization of exotic states of highly correlated matter. Here, we report on a theoretical study of the competing anisotropic dispersion, magnetic dipole-dipole, and electric quadrupole-quadrupole forces between two dysprosium atoms. Each dysprosium atom has an orbital angular momentum L=6 and magnetic moment $\\mu=10\\mu_B$. We show that the dispersion coefficients of the ground state adiabatic potentials lie between 1865 a.u. and 1890 a.u., creating a non-negligible anisotropy with a spread of 25 a.u. and that the electric quadrupole-quadrupole interaction is weak compared to the other interactions. We also find that for interatomic separations $R< 50\\,a_0$ both the anisotropic dispersion and magnetic dipole-dipole potential are larger than the atomic Zeeman splittings for external magnetic fields of order 10 G to ...

  10. First search for double $\\beta$ decay of dysprosium

    CERN Document Server

    Belli, P; Cappella, F; Cerulli, R; Danevich, F A; d'Angelo, S; Di Vacri, M L; Incicchitti, A; Laubenstein, M; Nagorny, S S; Nisi, S; Tolmachev, A V; Tretyak, V I; Yavetskiy, R P

    2011-01-01

    A search for double $\\beta$ decay of dysprosium was realized for the first time with the help of an ultra low-background HP Ge $\\gamma$ detector. After 2512 h of data taking with a 322 g sample of dysprosium oxide limits on double beta processes in $^{156}$Dy and $^{158}$Dy have been established on the level of $T_{1/2}\\geq 10^{14}-10^{16}$ yr. Possible resonant double electron captures in $^{156}$Dy and $^{158}$Dy were restricted on a similar level. As a by-product of the experiment we have measured the radioactive contamination of the Dy$_2$O$_3$ sample and set limits on the $\\alpha$ decay of dysprosium isotopes to the excited levels of daughter nuclei as $T_{1/2}\\geq 10^{15} - 10^{17}$ yr.

  11. Neutron resonance parameters of dysprosium isotopes using neutron capture yields

    Energy Technology Data Exchange (ETDEWEB)

    Shin, S. G.; Kye, Y. U.; Cho, M. H. [POSTECH, Pohang (Korea, Republic of); Namkung, W. [Pohang Accelerator Laboratory, Pohang (Korea, Republic of); Kim, G. N. [Kyungpook National University, Daegu (Korea, Republic of); Lee, M. W.; Kang, Y. R. [Dongnam Inst. Of Radiological and Medical Science, Busan (Korea, Republic of)

    2015-10-15

    Dysprosium is used in the field of nuclear reactor system because it has a very large thermal neutron absorption cross-section. The dysprosium alloyed with special stainless steels is attractive for control in nuclear reactor because of the ability to absorb neutrons readily without swelling or contracting over time and its high melting point. Dysprosium is also one of fission products from the thermal fission of {sup 234}U, {sup 233}U, and {sup 239}Pu. The fission products are accumulated in the reactor core by the burn-up of the nuclear fuel and the poison effect is increased. Therefore, it is required to understand how Dysprosium as both a poison and an absorbing material in the control rod has an effect on the neutron population in a nuclear reactor system over all energy regions. Neutron Capture experiments on Dy isotopes were performed at the electron linear accelerator (LINAC) facility of the Rensselear Polytechnic Institute (RPI) in the neutron energy region from 10 eV to 1 keV. Resonance parameters were extracted by fitting the neutron capture data using the SAMMY multilevel R-matrix Bayesian code.

  12. Properties of Polydisperse Tin-doped Dysprosium and Indium Oxides

    Directory of Open Access Journals (Sweden)

    Malinovskaya Tatyana

    2017-01-01

    Full Text Available The results of investigations of the complex permittivity, diffuse-reflectance, and characteristics of crystal lattices of tin-doped indium and dysprosium oxides are presented. Using the methods of spectroscopy and X-ray diffraction analysis, it is shown that doping of indium oxide with tin results in a significant increase of the components of the indium oxide complex permittivity and an appearance of the plasma resonance in its diffuse-reflectance spectra. This indicates the appearance of charge carriers with the concentration of more than 1021 cm−3 in the materials. On the other hand, doping of the dysprosium oxide with the same amount of tin has no effect on its optical and electromagnetic properties.

  13. Dysprosium titanate as an absorber material for control rods

    Science.gov (United States)

    Risovany, V. D.; Varlashova, E. E.; Suslov, D. N.

    2000-09-01

    Disprosium titanate is an attractive control rod material for the thermal neutron reactors. Its main advantages are: insignificant swelling, no out-gassing under neutron irradiation, rather high neutron efficiency, a high melting point (˜1870°C), non-interaction with the cladding at temperatures above 1000°C, simple fabrication and easily reprocessed non-radioactive waste. It can be used in control rods as pellets and powder. The disprosium titanate control rods have worked off in the MIR reactor for 17 years, in VVER-1000 - for 4 years without any operating problems. After post-irradiation examinations this type of control rod having high lifetime was recommended for the VVER and RBMK. The paper presents the examination results of absorber element dummies containing dysprosium titanate, irradiated in the SM reactor to the neutron fluence of 3.4×10 22 cm -2 ( E>0.1 MeV) and, also, the data on structure, thermal-physical properties of dysprosium titanate, efficiency of dysprosium titanate control rods.

  14. Dysprosium electrodeposition from a hexaalkylguanidinium-based ionic liquid

    Science.gov (United States)

    Berger, Claudia A.; Arkhipova, Maria; Maas, Gerhard; Jacob, Timo

    2016-07-01

    The rare-earth element dysprosium (Dy) is an important additive that increases the magnetocrystalline anisotropy of neodymium magnets and additionally prevents from demagnetizing at high temperatures. Therefore, it is one of the most important elements for high-tech industries and is mainly used in permanent magnetic applications, for example in electric vehicles, industrial motors and direct-drive wind turbines. In an effort to develop a more efficient electrochemical technique for depositing Dy on Nd-magnets in contrast to commonly used costly physical vapor deposition, we investigated the electrochemical behavior of dysprosium(iii) trifluoromethanesulfonate in a custom-made guanidinium-based room-temperature ionic liquid (RTIL). We first examined the electrodeposition of Dy on an Au(111) model electrode. The investigation was carried out by means of cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS). The initial stages of metal deposition were followed by in situ scanning tunneling microscopy (STM). CV measurements revealed a large cathodic reduction peak, which corresponds to the growth of monoatomic high islands, based on STM images taken during the initial stages of deposition. XPS identified these deposited islands as dysprosium. A similar reduction peak was also observed on an Nd-Fe-B substrate, and positively identified as deposited Dy using XPS. Finally, we varied the concentration of the Dy precursor, electrolyte flow and temperature during Dy deposition and demonstrated that each of these parameters could be used to increase the thickness of the Dy deposit, suggesting that these parameters could be tuned simultaneously in a temperature-controlled flow cell to enhance the thickness of the Dy layer.The rare-earth element dysprosium (Dy) is an important additive that increases the magnetocrystalline anisotropy of neodymium magnets and additionally prevents from demagnetizing at high temperatures. Therefore, it is one of the most important

  15. 48 CFR 3009.171-1 - General.

    Science.gov (United States)

    2010-10-01

    ... Prospective Contractors 3009.171-1 General. Except as provided in (HSAR) 48 CFR 3009.171-6 and 3009.171-7... under the Federal Protective Service (FPS) guard services program with any business concern owned...

  16. Dysprosium detector for neutron dosimetry in external beam radiotherapy

    Science.gov (United States)

    Ostinelli, A.; Berlusconi, C.; Conti, V.; Duchini, M.; Gelosa, S.; Guallini, F.; Vallazza, E.; Prest, M.

    2014-09-01

    Radiotherapy treatments with high-energy (>8 MeV) photon beams are a standard procedure in clinical practice, given the skin and near-target volumes sparing effect, the accurate penetration and the uniform spatial dose distribution. On the other hand, despite these advantages, neutrons may be produced via the photo-nuclear (γ,n) reactions of the high-energy photons with the high-Z materials in the accelerator head, in the treatment room and in the patient, resulting in an unwanted dose contribution which is of concern, given its potential to induce secondary cancers, and which has to be monitored. This work presents the design and the test of a portable Dysprosium dosimeter to be used during clinical treatments to estimate the "in vivo" dose to the patient. The dosimeter has been characterized and validated with tissue-equivalent phantom studies with a Varian Clinical iX 18 MV photon beam, before using it with a group of patients treated at the S. Anna Hospital in Como. The working principle of the dosimeter together with the readout chain and the results in terms of delivered dose are presented.

  17. Dysprosium detector for neutron dosimetry in external beam radiotherapy

    Energy Technology Data Exchange (ETDEWEB)

    Ostinelli, A.; Berlusconi, C.; Conti, V.; Duchini, M.; Gelosa, S. [Medical Physics - Sant' Anna Hospital, Como (Italy); Guallini, F. [EL.SE s.r.l. (Italy); Vallazza, E. [INFN, Trieste (Italy); Prest, M. [University of Insubria, Como (Italy)

    2014-09-21

    Radiotherapy treatments with high-energy (>8MeV) photon beams are a standard procedure in clinical practice, given the skin and near-target volumes sparing effect, the accurate penetration and the uniform spatial dose distribution. On the other hand, despite these advantages, neutrons may be produced via the photo-nuclear (γ,n) reactions of the high-energy photons with the high-Z materials in the accelerator head, in the treatment room and in the patient, resulting in an unwanted dose contribution which is of concern, given its potential to induce secondary cancers, and which has to be monitored. This work presents the design and the test of a portable Dysprosium dosimeter to be used during clinical treatments to estimate the “in vivo” dose to the patient. The dosimeter has been characterized and validated with tissue-equivalent phantom studies with a Varian Clinical iX 18 MV photon beam, before using it with a group of patients treated at the S. Anna Hospital in Como. The working principle of the dosimeter together with the readout chain and the results in terms of delivered dose are presented.

  18. Low Field Magnetic and Thermal Hysteresis in Antiferromagnetic Dysprosium

    Directory of Open Access Journals (Sweden)

    Iuliia Liubimova

    2017-06-01

    Full Text Available Magnetic and thermal hysteresis (difference in magnetic properties on cooling and heating have been studied in polycrystalline Dy (dysprosium between 80 and 250 K using measurements of the reversible Villari effect and alternating current (AC susceptibility. We argue that measurement of the reversible Villari effect in the antiferromagnetic phase is a more sensitive method to detect magnetic hysteresis than the registration of conventional B(H loops. We found that the Villari point, recently reported in the antiferromagnetic phase of Dy at 166 K, controls the essential features of magnetic hysteresis and AC susceptibility on heating from the ferromagnetic state: (i thermal hysteresis in AC susceptibility and in the reversible Villari effect disappears abruptly at the temperature of the Villari point; (ii the imaginary part of AC susceptibility is strongly frequency dependent, but only up to the temperature of the Villari point; (iii the imaginary part of the susceptibility drops sharply also at the Villari point. We attribute these effects observed at the Villari point to the disappearance of the residual ferromagnetic phase. The strong influence of the Villari point on several magnetic properties allows this temperature to be ranked almost as important as the Curie and Néel temperatures in Dy and likely also for other rare earth elements and their alloys.

  19. A Low-Symmetry Dysprosium Metallocene Single-Molecule Magnet with a High Anisotropy Barrier.

    Science.gov (United States)

    Pugh, Thomas; Chilton, Nicholas F; Layfield, Richard A

    2016-09-05

    The single-molecule magnet (SMM) properties of the isocarbonyl-ligated dysprosium metallocene [Cp*2 Dy{μ-(OC)2 FeCp}]2 (1Dy ), which contains a rhombus-shaped Dy2 Fe2 core, are described. Combining a strong axial [Cp*](-) ligand field with a weak equatorial field consisting of the isocarbonyl ligands leads to an anisotropy barrier of 662 cm(-1) in zero applied field. The dominant thermal relaxation pathways in 1Dy involves at least the fourth-excited Kramers doublet, thus demonstrating that prominent SMM behavior can be observed for dysprosium in low-symmetry environments.

  20. Malonate complexes of dysprosium: synthesis, characterization and application for LI-MOCVD of dysprosium containing thin films.

    Science.gov (United States)

    Milanov, Andrian P; Seidel, Rüdiger W; Barreca, Davide; Gasparotto, Alberto; Winter, Manuela; Feydt, Jürgen; Irsen, Stephan; Becker, Hans-Werner; Devi, Anjana

    2011-01-07

    A series of malonate complexes of dysprosium were synthesized as potential metalorganic precursors for Dy containing oxide thin films using chemical vapor deposition (CVD) related techniques. The steric bulkiness of the dialkylmalonato ligand employed was systematically varied and its influence on the resulting structural and physico-chemical properties that is relevant for MOCVD was studied. Single crystal X-ray diffraction analysis revealed that the five homoleptic tris-malonato Dy complexes (1-5) are dimers with distorted square-face bicapped trigonal-prismatic geometry and a coordination number of eight. In an attempt to decrease the nuclearity and increase the solubility of the complexes in various solvents, the focus was to react these dimeric complexes with Lewis bases such as 2,2'-biypridyl and pyridine (6-9). This resulted in monomeric tris-malonato mono Lewis base adduct complexes with improved thermal properties. Finally considering the ease of synthesis, the monomeric nature and promising thermal characteristics, the silymalonate adduct complex [Dy(dsml)(3)bipy] (8) was selected as single source precursor for growing DySi(x)O(y) thin films by liquid injection metalorganic chemical vapor deposition (LI-MOCVD) process. The as-deposited films were analyzed for their morphology and composition by scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, Rutherford backscattering (RBS) analysis and X-ray photoelectron spectroscopy.

  1. 22 CFR 171.22 - Appeals.

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    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Appeals. 171.22 Section 171.22 Foreign Relations DEPARTMENT OF STATE ACCESS TO INFORMATION AVAILABILITY OF INFORMATION AND RECORDS TO THE PUBLIC Executive Order 12958 Provisions § 171.22 Appeals. Any denial of a mandatory declassification review request...

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  3. 10 CFR 171.9 - Communications.

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    ... 10 Energy 2 2010-01-01 2010-01-01 false Communications. 171.9 Section 171.9 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) ANNUAL FEES FOR REACTOR LICENSES AND FUEL CYCLE LICENSES AND MATERIALS... APPROVALS AND GOVERNMENT AGENCIES LICENSED BY THE NRC § 171.9 Communications. All communications...

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  7. 46 CFR 160.171-11 - Performance.

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    ... 46 Shipping 6 2010-10-01 2010-10-01 false Performance. 160.171-11 Section 160.171-11 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) EQUIPMENT, CONSTRUCTION, AND MATERIALS: SPECIFICATIONS AND APPROVAL LIFESAVING EQUIPMENT Immersion Suits § 160.171-11 Performance. (a) Buoyancy....

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  9. 171

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    Apr 1, 2008 ... They can use hormonal methods, barrier methods, surgical ... Though the female condom is expensive compared to male .... Table 2. Fertility intention, contraceptive use and source of contraceptives among the respondents.

  10. Exploration of dysprosium: the most critical element for Japan

    Science.gov (United States)

    Watanabe, Y.

    2012-04-01

    Dysprosium (Dy), one of the heavy rare earth elements, is used mainly as an additive for NdFeB permanent magnets which are installed in various modern industrial products such as voice coil motors in computers, factory automation machinery, hybrid and electric vehicles, home electronics, and wind turbine, to improve heat resistance of the magnets. Dy has been produced about 2,000t per year from the ores from ion adsorption type deposits in southern China. However, the produced amount of Dy was significantly reduced in 2011 in China due to reservation of heavy rare earth resources and protection of natural environment, resulting in soaring of Dy price in the world. In order to respond the increasing demand of Dy, unconventional supply sources are inevitably developed, in addition to heavy rare earth enriched ion adsorption type deposits outside China. Heavy rare earth elements including Dy are dominantly hosted in xenotime, fergusonite, zircon, eudialyte, keiviite, kainosite, iimoriite, etc. Concentration of xenotime is found in placer deposits in Malaysia and India, hydrothermal deposits associated with unconformity-type uranium mineralization (Athabasca basin in Canada, Western Australia), iron-oxide fluorite mineralization (South Africa) and Sn-bearing alkaline granite (Brazil). Zircon and fergusontie concentration is found as igneous and hydrothermal products in peralkaline syenite, alkaline granite and pegmatite (e.g., Nechalacho in Canada). Eudialyte concentration is found in some peralkaline syenite bodies in Greenland, Canada, Sweden and Russia. Among these sources, large Dy resources are estimated in the deposits hosted in peralkaline rocks (Nechalacho: 79,000t, Kvanefjeld: 49,000t, Norra Karr: 15,700t, etc.) compared to the present demand of Dy. Thus, Dy will be supplied from the deposits associated with peralkaline and alkaline deposits in future instead of ion adsorption type deposits in southern China.

  11. Long afterglow of trivalent dysprosium doped strontium aluminate

    Energy Technology Data Exchange (ETDEWEB)

    Huang, Yuan Ming, E-mail: dongshanisland@126.com [School of Mathematics and Physics, Changzhou University, Jiangsu 213164 (China); Ma, Qing-lan [School of Mathematics and Physics, Changzhou University, Jiangsu 213164 (China); School of Electronics and Information, Nantong University, Jiangsu 226019 (China)

    2015-04-15

    Trivalent dysprosium doped strontium aluminate (SrA1{sub 2}O{sub 4}:Dy{sup 3+}) was synthesized via the sol–gel combustion method to realize green afterglow in the absence of Eu{sup 2+} luminescent centers. The morphology, crystal structure, photoluminescence and long afterglow of the SrAl{sub 2}O{sub 4}:Dy{sup 3+} were characterized with scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy and photoluminescence spectroscopy, respectively. The bluish-green photoluminescence of SrAl{sub 2}O{sub 4}:Dy{sup 3+} consists of a broad emission band centered at about 520 nm and two characteristic emissions of Dy{sup 3+} ions centered at 480 and 575 nm, respectively. The green afterglow of SrAl{sub 2}O{sub 4}:Dy{sup 3+} is a broad emission band centered at around 520 nm, and the lifetime extracted from afterglow decay is found to be 53 s. The mechanism on the green afterglow from SrAl{sub 2}O{sub 4}:Dy{sup 3+} is discussed in terms of the possible defect levels in the host. - Highlights: • Broad band long-lasting afterglow is observed in SrAl{sub 2}O{sub 4}:Dy{sup 3+} phosphors. • Characteristic emissions of Dy{sup 3+} ions are superimposed on the broad PL of phosphors. • Dy{sup 3+} ions can also act as luminescent centers in addition to electron traps. • A mechanism on long afterglow of SrAl{sub 2}O{sub 4}:Dy{sup 3+} is proposed without Eu{sup 2+} activator.

  12. Low temperature spin reorientation in dysprosium iron garnet

    Energy Technology Data Exchange (ETDEWEB)

    Lahoubi, M; Younsi, W; Soltani, M L [Department of Physics, Badji-Mokhtar University, BP-12 Annaba, 23000 (Algeria); Voiron, J; Schmitt, D, E-mail: mlahoubi@gmail.co [Louis Neel Laboratory, CNRS-UJF, BP-166, 38042 Grenoble Cedex 9 (France)

    2009-03-01

    The spin reorientation (SR) phase transition in dysprosium iron garnet (Dy{sub 3}Fe{sub 5}O{sub 12} or DyIG) have been studied by specific heat C{sub p}(T) and high field magnetisation measurements M{sub T}(H) and M{sub H}(T) on single crystals at low temperature. A first order SR is observed with a sharp jump at T{sub SR} = 14.5+-0.5 K in the C{sub p}(T) curve which corresponds to a spontaneous change from the high temperature (HT) easy direction (111) to an (uuw) angular low temperature (LT) phases. Above T{sub SR}, the magnetic structure is described by the irreducible representation (IR) A{sub 2g} of the rhombohedral space group R 3 c. Below T{sub SR}, the magnetic structure changes in the monoclinic the space group C2/c with the IR A{sub g}. When the field H is kept aligned along the hard symmetry directions (100) and (110), we obtain respectively the variation of the angular positions theta(T) and theta'(T) from the total spontaneous magnetisation down to 1.5 K (theta = 39.23 deg. and theta' = 30.14 deg.) and the results are in good agreement with the previous observations in low fields. When the sample is allowed to rotate freely on itself, the critical field H{sub c}(T) between the HT(111) and the LT(uuw) angular phases permits us to precise the transition line up to 15 T and 40 K between the so called canted field induced (FI) and the associated collinear magnetic phases. The experimental magnetic phase diagram (MPD) is precisely determined in the (H{sub c}-T) plane and the domains of the existence and the stability of the two magnetic phases are specified.

  13. Anisotropic magnetic properties of dysprosium iron garnet (DyIG)

    Energy Technology Data Exchange (ETDEWEB)

    Lahoubi, M; Younsi, W; Soltani, M-L [Department of Physics, Badji-Mokhtar University, BP 12 - 23000 Annaba (Algeria); Ouladdiaf, B, E-mail: mlahoubi@gmail.co [Institut Laue Langevin, BP 156 - 38042 Grenoble Cedex 9 (France)

    2010-01-01

    The magnetic properties of dysprosium iron garnet (DyIG) have been studied by performing high resolution powder neutron diffraction experiments and high dc fields magnetizations on single crystals. Among all the reflections (hkl) indexed in the nuclear cubic space group (CSG) Ia 3-bar d with h+k+l=2n and k=[000], the superstructure lines (hkl)* forbidden by the symmetry (222)* and (622)* are not observed in the patterns at all temperatures. The pattern at 130 K is well interpreted within the magnetic modes F belonging to the irreducible representation (IR) T{sub 1g} of the CSG and identified to the room temperature ferrimagnetic Neel model. The high magnetic field behavior of the spontaneous collinear magnetic structure (MS) along the easy axis (EA) <111> is isotropic. Below 130 K, the patterns exhibit additional magnetic superstructure lines. They are associated to the appearance of the spontaneous non collinear MS which is described in the subgroup of the CSG, R 3-bar c within the IR A{sub 2g}. A strong magnetization anisotropy (MA) is observed at 1.5 K in the low symmetry phases were the spin reorientation transition (SR) occur at T{sub RS}=14.5 K. The onset of MA is detected below two characteristic temperatures, Ta{sub 1}=125 K and Ta{sub 2}=75 K respectively to the hard axis (HA) <100> and <110>. Symmetry arguments are used in the framework of the theory of representation analysis (RA) applied to the subgroup of R 3-bar c, C2/c within the IR A{sub g}. It seems that this MA results essentially from the difference between the spontaneous non collinear MS and the field induced (FI) configurations. All results are discussed with previous neutrons studies.

  14. Dysprosium-containing layered double hydroxides nanoparticles intercalated with biologically active species as an approach for theranostic systems

    KAUST Repository

    Arratia-Quijada, Jenny

    2015-10-23

    A layered double hydroxide structure including dysprosium cations was prepared by co-precipitation. The nanoparticles showed a linear relationship with the reciprocal relaxation spin-lattice (T1) time of water protons which is reflected as contrast in aqueous suspensions analyzed by magnetic resonance imaging. The interlayer space of dysprosium containing LDH was successfully intercalated with folate, ibuprofen and gallate ions, which are key molecules for recognition of some cancer cells and treatment of diseases. The paramagnetic property of the dysprosium-containing LDH detected in this work beside the ability to transport drugs open up the opportunity to design theranostic materials in a single crystal phase with nanometric dimensions.

  15. Effects of Dysprosium Oxide Doping on Microstructure and Properties of Barium Titanate Ceramic

    Institute of Scientific and Technical Information of China (English)

    Pu Yongping; Ren Huijun; Chen Wei; Chen Shoutian

    2005-01-01

    Different amounts of dysprosium oxide were incorporated into barium titanate powders synthesized by hydrothermal method. Relations of substitution behaviors and lattice parameters with solid-solubility were studied. Furthermore, the influences of dysprosium oxide doping fraction on grain size and dielectric properties of barium titanate ceramic, including dielectric constant and breakdown electric field strength, were investigated via scanning electron microscope, X-ray diffraction and electric property tester. The results show that dysprosium oxide can restrain abnormal grain growth during sintering and that fine-grained and high density of barium titanate ceramic can result in excellent dielectric properties. As mass fraction of dysprosium oxide is 0.6%, the lattice parameters of grain increase to the maximum because of the lowest vacancy concentration. The electric property parameters are cited as following: dielectric constant (25 ℃) reaches 4100, the change in relative dielectric constant with temperature is -10% to 10% within the range of -15~100 ℃, breakdown electric field strength (alternating current) achieves 3.2 kV·mm-1, which can be used in manufacturing high voltage ceramic capacitors.

  16. Sandwich-type tetrakis(phthalocyaninato) dysprosium-cadmium quadruple-decker SMM.

    Science.gov (United States)

    Wang, Hailong; Qian, Kang; Wang, Kang; Bian, Yongzhong; Jiang, Jianzhuang; Gao, Song

    2011-09-14

    Homoleptic tetrakis[2,3,9,10,16,17,23,24-octa(butyloxy)phthalocyaninato] dysprosium-cadmium quadruple-decker complex 1 was isolated in relatively good yield of 43% from a simple one-pot reaction. This compound represents the first sandwich-type tetrakis(phthalocyaninato) rare earth-cadmium quadruple-decker SMM that has been structurally characterized.

  17. In situ characterization of the nitridation of dysprosium during mechanochemical processing

    Energy Technology Data Exchange (ETDEWEB)

    Jaques, Brian J.; Osterberg, Daniel D.; Alanko, Gordon A.; Tamrakar, Sumit; Smith, Cole R.; Hurley, Michael F.; Butt, Darryl P., E-mail: DarrylButt@BoiseState.edu

    2015-01-15

    Highlights: • A nitridation reaction in a high energy planetary ball mill was monitored in situ. • Dysprosium mononitride was synthesized from Dy at low temperatures in short times. • Ideal gas law and in situ temperature and pressure used to assess reaction extent. • It is proposed that reaction rate is proportional to the creation of new surface. - Abstract: Processing of advanced nitride ceramics traditionally requires long durations at high temperatures and, in some cases, in hazardous atmospheres. In this study, dysprosium mononitride (DyN) was rapidly formed from elemental dysprosium in a closed system at ambient temperatures. An experimental procedure was developed to quantify the progress of the nitridation reaction during mechanochemical processing in a high energy planetary ball mill (HEBM) as a function of milling time and intensity using in situ temperature and pressure measurements, SEM, XRD, and particle size analysis. No intermediate phases were formed. It was found that the creation of fresh dysprosium surfaces dictates the rate of the nitridation reaction, which is a function of milling intensity and the number of milling media. These results show clearly that high purity nitrides can be synthesized with short processing times at low temperatures in a closed system requiring a relatively small processing footprint.

  18. Dysprosium complexes with the tetraphenylporphyrin macrocyclic ligand; Complejos de disprosio con el ligante macrociclico tetrafenilporfirina

    Energy Technology Data Exchange (ETDEWEB)

    Martinez M, V.; Padilla, J.; Ramirez, F.M

    1992-04-15

    In this report, the results obtained on the synthesis, characterization and study of the chemical behavior of dysprosium complex with the acetylacetone chelating agent (Hacac) and the tetraphenylporphyrin macrocyclic ligand (H{sub 2}TFP) are given. Based on the literature but according to our necessities and interest, the appropriate methodology settled down from the synthesis of prime matters until the obtaining and characterization of the products. The acetyl acetonate complex was obtained of mono hydrated dysprosium [Dy(acac){sub 3}. H{sub 2}0] and trihydrated [Dy(acac){sub 3} .3 H{sub 2}0], the mono tetra phenyl porphyrinate [Dy(TFP)(acac). 2 ac] the double sandwich of the dysprosium porphyrinate [Dy(TFP){sub 2}] and the triple sandwich of the dysprosium porphyrinate [Dy(TFP){sub 3}. 2 TCB] (TCB = trichlorobenzene). Its were characterized by their melting points, solubility, IR, UV, TGA and DTA both first and besides the techniques already mentioned for NMR'H, RPE and Magnetic susceptibility the three last complexes. From the spectroscopic point of view, IR and RPE its suggested the existence of a complex of inverse mixed valence [Dy(TFP){sup 2-} (TFP) {sup 1-}] for the Dy(TFP){sub 2} as a result of the existence of the free radical (TFP' {sup 1-} and that it was not in none of the other porphyrin compounds. In the NMR'H spectra of the compounds were not observed signals in the region from 0 to 10 ppm that which shows that the dysprosium complexes in special those of the porphyrin type are highly paramagnetic and its could be used as displacement reagents, creators of images and contrast agents of great utility in these days in studies of NMR, technique today by today used in medical diagnoses. (Author)

  19. Synthesis, structural characterization and in vitro testing of dysprosium containing silica particles as potential MRI contrast enhancing agents

    Science.gov (United States)

    Chiriac, L. B.; Trandafir, D. L.; Turcu, R. V. F.; Todea, M.; Simon, S.

    2016-11-01

    The work is focused on synthesis and structural characterization of novel dysprosium-doped silica particles which could be considered as MRI contrast agents. Sol-gel derived silica rich particles obtained via freeze-drying and spray-drying processing methods were structurally characterized by XRD, 29Si MAS-NMR and XPS methods. The occurrence of dysprosium on the outermost layer of dysprosium containing silica particles was investigated by XPS analysis. The MRI contrast agent characteristics have been tested using RARE-T1 and RARE-T2 protocols. The contrast of MRI images delivered by the investigated samples was correlated with their local structure. Dysprosium disposal on microparticles with surface structure characterised by decreased connectivity of the silicate network units favours dark T2-weighted MRI contrast properties.

  20. Dysprosium-containing layered double hydroxides nanoparticles intercalated with biologically active species as an approach for theranostic systems

    Energy Technology Data Exchange (ETDEWEB)

    Arratia-Quijada, Jenny [Departamento de Ciencias de la Salud, Centro Universitario Tonalá, Universidad de Guadalajara, Av. Nuevo Periférico No. 555, C.P. 48525, Tonalá, Jalisco (Mexico); Sánchez Jiménez, Cecilia [Departamento de Química, Universidad de Guadalajara, Boulevard Marcelino García Barragán 1421, C.P. 44430, Guadalajara, Jalisco (Mexico); Gurinov, Andrey [Research Resources Center for Magnetic Resonance, St. Petersburg State University, Universitetskiy pr. 26, 198504 St. Petersburg (Russian Federation); NMR Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900 (Saudi Arabia); Pérez Centeno, Armando; Ceja Andrade, Israel [Departamento de Física, Universidad de Guadalajara, Boulevard Marcelino García Barragán 1421, C.P. 44430, Guadalajara, Jalisco (Mexico); Carbajal Arízaga, Gregorio Guadalupe, E-mail: gregoriocarbajal@yahoo.com.mx [Departamento de Química, Universidad de Guadalajara, Boulevard Marcelino García Barragán 1421, C.P. 44430, Guadalajara, Jalisco (Mexico)

    2016-01-15

    Graphical abstract: - Highlights: • LDH structure including dysprosium was prepared by co-precipitation. • LDH was capable to produce contrast in the T1 mode of MRI. • LDH were intercalated with folate, ibuprofen and gallate ions. - Abstract: A layered double hydroxide structure including dysprosium cations was prepared by co-precipitation. The nanoparticles showed a linear relationship with the reciprocal relaxation spin-lattice (T1) time of water protons which is reflected as contrast in aqueous suspensions analyzed by magnetic resonance imaging. The interlayer space of dysprosium containing LDH was successfully intercalated with folate, ibuprofen and gallate ions, which are key molecules for recognition of some cancer cells and treatment of diseases. The paramagnetic property of the dysprosium-containing LDH detected in this work beside the ability to transport drugs open up the opportunity to design theranostic materials in a single crystal phase with nanometric dimensions.

  1. Slow magnetic relaxation in a hydrogen-bonded 2D array of mononuclear dysprosium(III) oxamates.

    Science.gov (United States)

    Fortea-Pérez, Francisco R; Vallejo, Julia; Julve, Miguel; Lloret, Francesc; De Munno, Giovanni; Armentano, Donatella; Pardo, Emilio

    2013-05-01

    The reaction of N-(2,6-dimethylphenyl)oxamic acid with dysprosium(III) ions in a controlled basic media afforded the first example of a mononuclear lanthanide oxamate complex exhibiting a field-induced slow magnetic relaxation behavior typical of single-ion magnets (SIMs). The hydrogen-bond-mediated self-assembly of this new bifunctional dysprosium(III) SIM in the solid state provides a unique example of 2D hydrogen-bonded polymer with a herringbone net topology.

  2. 22 CFR 17.1 - General.

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false General. 17.1 Section 17.1 Foreign Relations DEPARTMENT OF STATE PERSONNEL OVERPAYMENTS FROM THE FOREIGN SERVICE RETIREMENT AND DISABILITY FUND UNDER THE FOREIGN SERVICE RETIREMENT AND DISABILITY SYSTEM (FSRDS) AND THE FOREIGN SERVICE PENSION SYSTEM...

  3. 22 CFR 171.20 - Definitions.

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Definitions. 171.20 Section 171.20 Foreign Relations DEPARTMENT OF STATE ACCESS TO INFORMATION AVAILABILITY OF INFORMATION AND RECORDS TO THE PUBLIC..., or is under the control of the United States Government. (h) Mandatory declassification review means...

  4. 10 CFR 171.5 - Definitions.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 2 2010-01-01 2010-01-01 false Definitions. 171.5 Section 171.5 Energy NUCLEAR REGULATORY... partly owned by the United States of America which is an instrumentality of the United States, or any..., INCLUDING HOLDERS OF CERTIFICATES OF COMPLIANCE, REGISTRATIONS, AND QUALITY ASSURANCE PROGRAM APPROVALS...

  5. 10 CFR 171.1 - Purpose.

    Science.gov (United States)

    2010-01-01

    ..., and quality assurance program approvals issued by the United States Nuclear Regulatory Commission... 10 Energy 2 2010-01-01 2010-01-01 false Purpose. 171.1 Section 171.1 Energy NUCLEAR REGULATORY..., INCLUDING HOLDERS OF CERTIFICATES OF COMPLIANCE, REGISTRATIONS, AND QUALITY ASSURANCE PROGRAM APPROVALS...

  6. 17 CFR 171.25 - Appeal brief.

    Science.gov (United States)

    2010-04-01

    ... 17 Commodity and Securities Exchanges 1 2010-04-01 2010-04-01 false Appeal brief. 171.25 Section... Denial and Registration Actions § 171.25 Appeal brief. (a) Time to file. Any person who has filed a... appeal brief with the Proceedings Clerk within thirty days after service of the record by the...

  7. 17 CFR 171.26 - Answering brief.

    Science.gov (United States)

    2010-04-01

    ... 17 Commodity and Securities Exchanges 1 2010-04-01 2010-04-01 false Answering brief. 171.26... Denial and Registration Actions § 171.26 Answering brief. (a) Time for filing answering brief. Within thirty days after service of the apeal brief, the National Futures Association shall file with...

  8. Dysprosium-Catalyzed Growth of Single-Walled Carbon Nanotube Arrays on Substrates

    Directory of Open Access Journals (Sweden)

    Qian Yong

    2009-01-01

    Full Text Available Abstract In this letter, we report that dysprosium is an effective catalyst for single-walled carbon nanotubes (SWNTs growth via a chemical vapor deposition (CVD process for the first time. Horizontally superlong well-oriented SWNT arrays on SiO2/Si wafer can be fabricated by EtOH-CVD under suitable conditions. The structure and properties are characterized by scanning electron microscopy, transition electron microscopy, Raman spectroscopy and atomic force microscopy. The results show that the SWNTs from dysprosium have better structural uniformity and better conductivity with fewer defects. This rare earth metal provides not only an alternative catalyst for SWNTs growth, but also a possible method to generate high percentage of superlong semiconducting SWNT arrays for various applications of nanoelectronic device.

  9. Direct Search for keV Sterile Neutrino Dark Matter with a Stable Dysprosium Target

    CERN Document Server

    Lasserre, T; Cribier, M; Merle, A; Mertens, S; Vivier, M

    2016-01-01

    We investigate a new method to search for keV-scale sterile neutrinos that could account for Dark Matter. Neutrinos trapped in our galaxy could be captured on stable $^{163}$Dy if their mass is greater than 2.83~keV. Two experimental realizations are studied, an integral counting of $^{163}$Ho atoms in dysprosium-rich ores and a real-time measurement of the emerging electron spectrum in a dysprosium-based detector. The capture rates are compared to the solar neutrino and radioactive backgrounds. An integral counting experiment using several kilograms of $^{163}$Dy could reach a sensitivity for the sterile-to-active mixing angle $\\sin^2\\theta_{e4}$ of $10^{-5}$ significantly exceeding current laboratory limits. Mixing angles as low as $\\sin^2\\theta_{e4} \\sim 10^{-7}$ / $\\rm m_{^{163}\\rm Dy}\\rm{(ton)}$ could possibly be explored with a real-time experiment.

  10. Preparation of Dysprosium Ferrite/Polyacrylamide Magnetic Composite Microsphere and Its Characterization

    Institute of Scientific and Technical Information of China (English)

    Hidehiro Kumazawa; Wang Zhifeng; Zhou Lanxiang; Zhang Hong; Li Yourong; Zhang Ming

    2005-01-01

    Using the technique of microemulsion polymerization with nano-reactor, dysprosium ferrite/polyacrylamide magnetic composite microsphere was prepared by one-step method in a single inverse microemulsion. The structure, average particle size, morphology of composite microsphere were characterized by FTIR, XRD, TEM and TGA. The magnetic responsibility of composite microsphere was also investigated. The results indicate that the magnetic composite microsphere possess high magnetic responsibility and suspension stability.

  11. {Delta}I = 2 energy staggering in normal deformed dysprosium nuclei

    Energy Technology Data Exchange (ETDEWEB)

    Riley, M.A.; Brown, T.B.; Archer, D.E. [Florida State Univ., Tallahassee, FL (United States)] [and others

    1996-12-31

    Very high spin states (I{ge}50{Dirac_h}) have been observed in {sup 155,156,157}Dy. The long regular band sequences, free from sharp backbending effects, observed in these dysprosium nuclei offer the possibility of investigating the occurence of any {Delta}I = 2 staggering in normal deformed nuclei. Employing the same analysis techniques as used in superdeformed nuclei, certain bands do indeed demonstrate an apparent staggering and this is discussed.

  12. Poly[[[μ3-N′-(carboxymethylethylenediamine-N,N,N′-triacetato]dysprosium(III] trihydrate

    Directory of Open Access Journals (Sweden)

    Xiaomei Zhuang

    2010-11-01

    Full Text Available In the title coordination polymer, {[Dy(C10H13N2O8]·3H2O}n, the dysprosium(III ion is coordinated by two N atoms and six O atoms from three different (carboxymethylethylenediaminetriacetate ligands in a distorted square-antiprismatic geometry. The ligands connect the metal atoms, forming layers parallel to the ab plane. O—H...O hydrogen bonds further assemble adjacent layers into a three-dimensional supramolecular network.

  13. Making two dysprosium atoms rotate - Einstein-de Haas effect revisited

    OpenAIRE

    Górecki, Wojciech; Rzążewski, Kazimierz

    2016-01-01

    We present a numerical study of the behaviour of two magnetic dipolar atoms trapped in a harmonic potential and exhibiting the standard Einstein-de Haas effect while subject to a time dependent homogeneous magnetic field. Using a simplified description of the short range interaction and the full expression for the dipole-dipole forces we show, that under experimentally realisable conditions two dysprosium atoms may be pumped to a high ($l>20$) value of the relative orbital angular momentum.

  14. Phosphor Dysprosium-Doped Layered Double Hydroxides Exchanged with Different Organic Functional Groups

    Directory of Open Access Journals (Sweden)

    David Ricardo Martínez Vargas

    2013-01-01

    Full Text Available The layers of a Zn/Al layered double hydroxide (LDH were doped with Dy3+ cations. Among some compositions, the Zn2+ : Al3+ : Dy3+ molar ratio equal to 30 : 9 : 1 presented a single crystalline phase. Organic anions with carboxylic, amino, sulfate, or phosphate functional groups were intercalated as single layers between LDH layers as confirmed by X-ray diffraction and infrared spectroscopy. Photoluminescence spectra of the nitrate intercalated LDH showed a wide emission band with strong intensity in the yellow region (around 574 nm, originated due to symmetry distortion of the octahedral coordination in dysprosium centers. Moreover, a broad red band emission was also detected apparently due to the presence of zinc oxide. The distorted symmetry of the dysprosium coordination environment, also confirmed by X-ray photoelectron spectroscopy analysis, was modified after the intercalation with phenyl phosphonate (PP, aspartate (Asp, adipate (Adip, and serinate (Ser anions; the emission as measured from PL spectra of these LDH was more intense in the blue region (ca. 486 nm, thus indicating an increase in symmetry of dysprosium octahedrons. The red emission band from zinc oxide kept the same intensity after intercalation of dodecyl sulfate (DDS. An additional emission of unknown origin at λ = 767 nm was present in all LDHs.

  15. Systematic study on surface and magnetostructural changes in Mn-substituted dysprosium ferrite by hydrothermal method

    Energy Technology Data Exchange (ETDEWEB)

    Rekha, G. [Department of Physics, College of Engineering Guindy, Anna University, Sardar Patel Road, Chennai 600025 (India); Tholkappiyan, R. [Department of Physics, College of Engineering Guindy, Anna University, Sardar Patel Road, Chennai 600025 (India); Department of Physics, College of Science, UAE University, Al-Ain 15551 (United Arab Emirates); Vishista, K., E-mail: raovishista@gmail.com [Department of Physics, College of Engineering Guindy, Anna University, Sardar Patel Road, Chennai 600025 (India); Hamed, Fathalla [Department of Physics, College of Science, UAE University, Al-Ain 15551 (United Arab Emirates)

    2016-11-01

    Highlights: • Garnet type Dy{sub 3}Fe{sub 5-x}Mn{sub x}O{sub 12} (x = 0–0.06) nanoparticles of 88.4–86.8 nm were synthesized by hydrothermal method. • The Dy, Mn, Fe and O elements in the ferrites were confirmed from XPS. • The multiple oxidation states of Fe and Mn ions, bonding energy and cationic distributions of the samples were examined by XPS. • The magnetic property shows ferromagnetic behavior from VSM technique. • The results from these studies are correlated with respect to Mn dopant. - Abstract: Dysprosium iron garnets are of scientific importance because of the wide range of magnetic properties that can be obtained in substituting dysprosium by a rare earth metal. In the present work, the effect of Mn substitution on magnetostructural changes in dysprosium ferrite nanoparticles is studied. Highly crystalline pure and Mn doped dysprosium ferrite nanoparticles were synthesized by hydrothermal method. The samples were calcined at 1100 °C for 2 h in air atmosphere which is followed by characterization using XRD, FT-IR analysis, SEM, XPS and VSM. The average crystallite size of synthesized samples were calculated by X-ray diffraction falls in the range of 88.4–86.8 nm and was found to be in cubic garnet structure. For further investigation of the structure and corresponding changes in the tetrahedral and octahedral stretching vibrational bonds, FT-IR was used. The synthesized samples consist of multiple oxidation (Fe{sup 3+} and Fe{sup 2+}) states for Fe ions and (Mn{sup 3+} and Mn{sup 2+}) Mn ions analyzed in three ways of Fe 2p and Mn 2p spectra from the XPS analysis. With respect to Mn dopant in Dy{sub 3}Fe{sub 5}O{sub 12}, the cationic distributions of elements were discussed from high resolution XPS spectra by peak position and shift, area, width. To find out the porous/void surface morphology of the sample, scanning electron microscopy was used. From XPS analysis, the presence of elements (Dy, Mn, Fe and O) and their composition in the

  16. Synthesis, structural characterization and in vitro testing of dysprosium containing silica particles as potential MRI contrast enhancing agents

    Energy Technology Data Exchange (ETDEWEB)

    Chiriac, L.B.; Trandafir, D.L. [Faculty of Physics & National Magnetic Resonance Center, Babeş-Bolyai University, Cluj-Napoca, RO-400084 (Romania); Interdisciplinary Research Institute on Bio-Nano-Sciences & Faculty of Physics, Babeş-Bolyai University, Cluj-Napoca, RO-400084 (Romania); Turcu, R.V.F. [Faculty of Physics & National Magnetic Resonance Center, Babeş-Bolyai University, Cluj-Napoca, RO-400084 (Romania); Todea, M. [Interdisciplinary Research Institute on Bio-Nano-Sciences & Faculty of Physics, Babeş-Bolyai University, Cluj-Napoca, RO-400084 (Romania); Simon, S., E-mail: simons@phys.ubbcluj.ro [Faculty of Physics & National Magnetic Resonance Center, Babeş-Bolyai University, Cluj-Napoca, RO-400084 (Romania); Interdisciplinary Research Institute on Bio-Nano-Sciences & Faculty of Physics, Babeş-Bolyai University, Cluj-Napoca, RO-400084 (Romania)

    2016-11-01

    Highlights: • Dysprosium containing silica microparticles obtained by freeze and spray drying. • Higher structural units interconnection achieved in freeze vs. spray dried samples. • Dy occurance on the outermost layer of the microparticles evidenced by XPS. • Enhanced MRI contrast observed for freeze dried samples with 5% mol Dy{sub 2}O{sub 3}. - Abstract: The work is focused on synthesis and structural characterization of novel dysprosium-doped silica particles which could be considered as MRI contrast agents. Sol-gel derived silica rich particles obtained via freeze-drying and spray-drying processing methods were structurally characterized by XRD, {sup 29}Si MAS-NMR and XPS methods. The occurrence of dysprosium on the outermost layer of dysprosium containing silica particles was investigated by XPS analysis. The MRI contrast agent characteristics have been tested using RARE-T{sub 1} and RARE-T{sub 2} protocols. The contrast of MRI images delivered by the investigated samples was correlated with their local structure. Dysprosium disposal on microparticles with surface structure characterised by decreased connectivity of the silicate network units favours dark T{sub 2}-weighted MRI contrast properties.

  17. 14 CFR 171.107 - Definition.

    Science.gov (United States)

    2010-01-01

    ... FACILITIES NON-FEDERAL NAVIGATION FACILITIES Simplified Directional Facility (SDF) § 171.107 Definition. As used in this subpart: SDF (simplified directional facility) means a directional aid facility...

  18. 14 CFR 171.101 - Scope.

    Science.gov (United States)

    2010-01-01

    ... FACILITIES NON-FEDERAL NAVIGATION FACILITIES Simplified Directional Facility (SDF) § 171.101 Scope. This... Directional Facilities (SDF) that are to be involved in the approval of instrument flight rules and...

  19. 40 CFR 98.171 - Reporting threshold.

    Science.gov (United States)

    2010-07-01

    ...) MANDATORY GREENHOUSE GAS REPORTING Iron and Steel Production § 98.171 Reporting threshold. You must report GHG emissions under this subpart if your facility contains an iron and steel production process...

  20. A thirty second isomer in Hf-171

    NARCIS (Netherlands)

    Campbell, P; Billowes, J; Cochrane, ECA; Cooke, JL; Cooper, TG; Dendooven, P; Evans, DE; Grant, IS; Griffith, JAR; Honkanen, A; Huhta, M; Oinonen, M; Pearson, MR; Penttila, H; Persson, B.L.; Richardson, DS; Tungate, G; Wheeler, PD; Zybert, L; Aysto, J

    1997-01-01

    An isomer has been detected in Hf-171 with a half-life of T-1/2 = 29.5(9) s. The state was populated in the Yb-170(alpha,3n)Hf-171m reaction at a beam energy of E-alpha = 50 MeV in an on-line ion guide isotope separator. The isomeric Hf-17lm(+) beam was extracted from the ion guide, mass-analysed an

  1. Influence of exchange splitting on optical properties in gadolinium and dysprosium single crystals

    Energy Technology Data Exchange (ETDEWEB)

    Knyazev, Yu.V.; Bolotin, G.A. (AN SSSR, Sverdlovsk. Inst. Fiziki Metallov)

    1984-12-01

    The temperature dependences of optical conductivity in gadolinium and dysprosium single crystals at the light wave vector polarization along a hexagonal axis and in the basis plane are considered. A substantial anisotropy of interzonal absorption has been found. The sample transition into magnetically ordered state is shown to be accompanied by the emergence of resonance absorption peaks in the near infrared spectral region. The manifestation of these peculiarities is associated with quantum electron transitions between the s-, d-f- interaction-split energy bands near the Fermi level. Main peculiarities of the experimental spectrum of gadolinium optical conductivity found their reflection in theoretically calculated dispersion dependence.

  2. Therapeutic application of dysprosium-165-FHMA in the treatment of rheumatoid knee effusions

    Energy Technology Data Exchange (ETDEWEB)

    English, R.J.; Zalutsky, M.; Venkatesan, P.; Sledge, C.B.

    1986-03-01

    Radiation synovectomy utilizing a variety of radionuclides has proven to be an effective technique in the treatment of rheumatoid arthritis. The recent introduction of the short-lived radionuclide, Dysprosium-165 (/sup 165/Dy), as a replacement for the longer-lived radiocolloids has reduced nontarget dosimetry caused by leakage of the agent from the articular cavity. A review of the methods and status of radiation synovectomy, and the application of /sup 165/Dy-ferric hydroxide macroaggregates (FHMA) as an alternative therapeutic agent is described.

  3. Properties of dysprosium-doped gallium lanthanum sulfide fiber amplifiers operating at 1.3 microm.

    Science.gov (United States)

    Samson, B N; Schweizer, T; Hewak, D W; Laming, R I

    1997-05-15

    In light of recent progress in the fabrication of gallium lanthanum sulfide (GaLaS) fibers, we have modeled the performance of dysprosium-doped GaLaS fiber amplifiers operating at 1.3 microm . Based on experimental data, we find that the incorporation of a codopant (terbium) in the fiber core significantly shortens the optimum amplifier length from >30 m to approximately 3 m . Such a device may be practical, given the fiber losses currently achieved in GaLaS fibers.

  4. Dicty_cDB: SLH171 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available SL (Link to library) SLH171 (Link to dictyBase) - - - Contig-U13857-1 SLH171P (Link... to Original site) SLH171F 539 SLH171Z 458 SLH171P 997 - - Show SLH171 Library SL (Link to library) Clone ID SLH171 (Link to dict...yBase) Atlas ID - NBRP ID - dictyBase ID - Link to Contig Contig-U13857-1 Original site URL http://dict...AGGAFSGIIPDVVHPSQSGIASGWLG VGFSLGLLIGTILFGTLLEVKNVIHTWYLYGATIAFLGISALITICTMHEDSNDEWSFD- -- ---VGYGAYQCVDWALA...IPDVVHPSQSGIASGWLG VGFSLGLLIGTILFGTLLEVKNVIHTWYLYGATIAFLGISALITICTMHEDSNDEWSFD- -- ---cwlwclsmc*lgigtsfitk*n

  5. Effect of dysprosium on the kinetics and structural transformations during the decomposition of the supersaturated solid solution in magnesium-samarium alloys

    Science.gov (United States)

    Rokhlin, L. L.; Luk'yanova, E. A.; Tabachkova, N. Yu.; Dobatkina, T. V.; Tarytina, I. E.; Korol'kova, I. G.

    2017-03-01

    The effect of dysprosium added in the amounts such that it does not form an individual phase in equilibrium with solid magnesium on the decomposition of the supersaturated magnesium solid solution in Mg-Sm alloys is studied. The presence of dysprosium in Mg-Sm alloys is found to retard the decomposition of the supersaturated magnesium solid solution and to increase the hardening effect upon aging. When these alloys are aged, dysprosium is partly retained in the magnesium solid solution and partly enters into the compositions of the phases that form during the decomposition of the solid solution and are characteristic of Mg-Sm alloys.

  6. Cyclic single-molecule magnets: from the odd-numbered heptanuclear to a dimer of heptanuclear dysprosium clusters.

    Science.gov (United States)

    Tian, Haiquan; Bao, Song-Song; Zheng, Li-Min

    2016-02-01

    A heptanuclear and a dimer of heptanuclear dysprosium clusters (Dy7 and Dy14) have been successfully synthesized by ingenious coalescence of the single and double pyrazinyl hydrazone as well as phosphonate ligands. The complexes feature the largest odd-numbered cyclic lanthanide clusters reported thus far. Both exhibit single molecule magnet behaviors at low temperature.

  7. A comparison of the effects of symmetry and magnetoanisotropy on paramagnetic relaxation in related dysprosium single ion magnets.

    Science.gov (United States)

    Williams, Ursula J; Mahoney, Brian D; DeGregorio, Patrick T; Carroll, Patrick J; Nakamaru-Ogiso, Eiko; Kikkawa, James M; Schelter, Eric J

    2012-06-07

    Dysprosium complexes of the tmtaa(2-) ligand were synthesized and characterized by X-band EPR and magnetism studies. Both complexes demonstrate magnetoanisotropy and slow paramagnetic relaxation. Comparison of these compounds with the seminal phthalocyanine complex [Dy(Pc)(2)](-) shows the azaannulide complexes are more susceptible to relaxation through non-thermal pathways.

  8. Dual responsive dysprosium-doped hydroxyapatite particles and toxicity reduction after functionalization with folic and glucuronic acids

    Energy Technology Data Exchange (ETDEWEB)

    Sánchez Lafarga, Ana Karen; Pacheco Moisés, Fermín P. [Departamento de Química, Universidad de Guadalajara, Marcelino García Barragán 1421, C.P. 44430, Guadalajara, Jalisco (Mexico); Gurinov, Andrey [Research Resources Center for Magnetic Resonance, Saint Petersburg State University, Universitetskij pr. 26, 198504 St. Petersburg (Russian Federation); Ortiz, Genaro Gabriel [Laboratorio Desarrollo-Envejecimiento, Enfermedades Neurodegenerativas, Centro de Investigación Biomédica de Occidente (CIBO), Instituto Mexicano de Seguro Social (IMSS), Guadalajara, Jalisco (Mexico); Carbajal Arízaga, Gregorio Guadalupe, E-mail: gregoriocarbajal@yahoo.com.mx [Departamento de Química, Universidad de Guadalajara, Marcelino García Barragán 1421, C.P. 44430, Guadalajara, Jalisco (Mexico)

    2015-03-01

    The development of probes for biomedical applications demands materials with low toxicity levels besides fluorescence or magnetic properties to be detected by confocal microscopes or MRI resonators. Several drug delivery systems or other biomedical materials prepared with hydroxyapatite have been proposed, however, toxicity effects might arise when the size of particles is nanometric. In this study, hydroxyapatite functionalized with glucuronic or folic acids presented lower oxidative stress, measured from lipoperoxides and nitric oxide indicators in rats than pure hydroxyapatite. In separated experiments, hydroxyapatite was doped with dysprosium cations by coprecipitation producing a single crystal phase with fluorescent properties easily visualized by confocal microscopy when excited at 488 nm. These particles also presented the ability to modify the proton relaxation time in T1 maps collected by magnetic resonance imaging. These modified hydroxyapatite nanoparticles could be candidates to design bimodal probes with low toxicity. - Highlights: • Hydroxyapatite functionalized with glucuronic acid reduced oxidative stress in rats. • Functionalization with folic acid reduced oxidative stress in rats. • Dysprosium doping does not affect the crystalline structure of hydroxyapatite. • Dysprosium doped particles are visible in fluorescent microscope. • Dysprosium doped particles act as MRI contrast agents.

  9. Tuning Slow Magnetic Relaxation in a Two-Dimensional Dysprosium Layer Compound through Guest Molecules.

    Science.gov (United States)

    Chen, Qi; Li, Jian; Meng, Yin-Shan; Sun, Hao-Ling; Zhang, Yi-Quan; Sun, Jun-Liang; Gao, Song

    2016-08-15

    A novel two-dimensional dysprosium(III) complex, [Dy(L)(CH3COO)]·0.5DMF·H2O·2CH3OH (1), has been successfully synthesized from a new pyridine-N-oxide (PNO)-containing ligand, namely, N'-(2-hydroxy-3-methoxybenzylidene)pyridine-N-oxidecarbohydrazide (H2L). Single-crystal X-ray diffraction studies reveal that complex 1 is composed of a dinuclear dysprosium subunit, which is further extended by the PNO part of the ligand to form a two-dimensional layer. Magnetic studies indicate that complex 1 shows well-defined temperature- and frequency-dependent signals under a zero direct-current (dc) field, typical of slow magnetic relaxation with an effective energy barrier Ueff of 33.6 K under a zero dc field. Interestingly, powder X-ray diffraction and thermogravimetric analysis reveal that compound 1 undergoes a reversible phase transition that is induced by the desorption and absorption of methanol and water molecules. Moreover, the desolvated sample [Dy(L)(CH3COO)]·0.5DMF (1a) also exhibits slow magnetic relaxation but with a higher anisotropic barrier of 42.0 K, indicating the tuning effect of solvent molecules on slow magnetic relaxation.

  10. Dosimetric properties of dysprosium doped calcium magnesium borate glass subjected to Co-60 gamma ray

    Energy Technology Data Exchange (ETDEWEB)

    Omar, R. S., E-mail: ratnasuffhiyanni@gmail.com; Wagiran, H., E-mail: husin@utm.my; Saeed, M. A. [Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310 Johor Bahru (Malaysia)

    2016-01-22

    Thermoluminescence (TL) dosimetric properties of dysprosium doped calcium magnesium borate (CMB:Dy) glass are presented. This study is deemed to understand the application of calcium as the modifier in magnesium borate glass with the presence of dysprosium as the activator to be performed as TL dosimeter (TLD). The study provides fundamental knowledge of a glass system that may lead to perform new TL glass dosimetry application in future research. Calcium magnesium borate glass systems of (70-y) B{sub 2}O{sub 3} − 20 CaO – 10 MgO-(y) Dy{sub 2}O{sub 3} with 0.05  mol % ≤ y ≤ 0.7  mol % of dyprosium were prepared by melt-quenching technique. The amorphous structure and TL properties of the prepared samples were determined using powder X-ray diffraction (XRD) and TL reader; model Harshaw 4500 respectively. The samples were irradiated to Co-60 gamma source at a dose of 50 Gy. Dosimetric properties such as annealing procedure, time temperature profile (TTP) setting, optimization of Dy{sub 2}O{sub 3} concentration of 0.5 mol % were determined for thermoluminescence dosimeter (TLD) reader used.

  11. Dicty_cDB: CHP171 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available CH (Link to library) CHP171 (Link to dictyBase) - - - Contig-U11143-1 - (Link to Original site) CHP...171F 167 - - - - - - Show CHP171 Library CH (Link to library) Clone ID CHP171 (Link to dicty...iol.tsukuba.ac.jp/CSM/CH/CHP1-C/CHP171Q.Seq.d/ Representative seq. ID - (Link to ...Original site) Representative DNA sequence >CHP171 (CHP171Q) /CSM/CH/CHP1-C/CHP171Q.Seq.d/ CTGTTGGCCTACTGGNA...6 (SHJ576Q) /CSM/SH/SHJ5-D/SHJ576Q.Seq.d/ 82 3e-15 CHP393 (CHP393Q) /CSM/CH/CHP3-D/CHP393Q.Seq.d/ 82 3e-15 CHP171 (CHP

  12. 14 CFR 171.113 - Installation requirements.

    Science.gov (United States)

    2010-01-01

    ...) NAVIGATIONAL FACILITIES NON-FEDERAL NAVIGATION FACILITIES Simplified Directional Facility (SDF) § 171.113..., applicable electric and safety codes, and FCC requirements. (b) The SDF facility must have the following basic components: (1) VHF SDF equipment and associated monitor system; (2) Remote control, and...

  13. 48 CFR 3009.171-2 - Definitions.

    Science.gov (United States)

    2010-10-01

    ... SECURITY ACQUISITION REGULATION (HSAR) ACQUISITION PLANNING CONTRACTOR QUALIFICATIONS Responsible Prospective Contractors 3009.171-2 Definitions. As used in this subpart— Business concern means a commercial... 48 Federal Acquisition Regulations System 7 2010-10-01 2010-10-01 false Definitions....

  14. 14 CFR 171.109 - Performance requirements.

    Science.gov (United States)

    2010-01-01

    ... sector width when an aircraft is positioned on the course line and is in a roll attitude of 20° from the horizontal. (6) The SDF must provide signals sufficient to allow satisfactory operation of a typical aircraft... designated control point(s) when any of the conditions of § 171.111(j) occur, within the time periods...

  15. 19 CFR 10.171 - General.

    Science.gov (United States)

    2010-04-01

    ....171 General. (a) Statutory authority. Title V of the Trade Act of 1974 as amended (19 U.S.C. 2461-2467... by Executive order in accordance with sections 502(a)(1) and 503(a) of the Trade Act of 1974 as... the case of an association of countries which is a free trade area or customs union or which...

  16. 22 CFR 171.41 - Covered employees.

    Science.gov (United States)

    2010-04-01

    ... Foreign Relations DEPARTMENT OF STATE ACCESS TO INFORMATION AVAILABILITY OF INFORMATION AND RECORDS TO THE PUBLIC Ethics in Government Act Provisions § 171.41 Covered employees. (a) Officers and employees (including special Government employees as defined in 18 U.S.C. 202) whose positions are classified at...

  17. 14 CFR 171.21 - Scope.

    Science.gov (United States)

    2010-01-01

    ... FACILITIES NON-FEDERAL NAVIGATION FACILITIES Nondirectional Radio Beacon Facilities § 171.21 Scope. (a) This... radio beacon facilities that are to be involved in the approval of instrument flight rules and air traffic control procedures related to those facilities. (b) A nondirectional radio beacon (“H”...

  18. Luminescent properties of dysprosium(Ⅲ) ions in LaAlO3 nanocrystallites

    Institute of Scientific and Technical Information of China (English)

    K. Lema(n)ski; P.J. Dere(n)

    2011-01-01

    The absorption and emission spectra as well as decay time profile of Dy3+ ions in LaAlO3 nanocrystals were analyzed.The crystal structure of LaAlO3 was confirmed from XRD measurement.The emission peaks from blue to red came from main emitting level of dysprosium 4F9/2 to the ground and other excited levels of Dy3+ ions.Cross relaxation process led to non-radiative quenching of luminescence,so that the lifetime of the 4F9/2 energy level ions decreased with increasing amount of doped Dy3+ ions.The cross relaxation transfer rates were experimentally determined as a function of Dy3+ concentration.

  19. Magnetic ordering temperatures in rare earth metal dysprosium under ultrahigh pressures

    Science.gov (United States)

    Samudrala, Gopi K.; Tsoi, Georgiy M.; Weir, Samuel T.; Vohra, Yogesh K.

    2014-04-01

    Magnetic ordering temperatures in heavy rare earth metal dysprosium (Dy) have been studied using an ultrasensitive electrical transport measurement technique in a designer diamond anvil cell to a pressure of 69 GPa and a temperature of 10 K. Previous studies using magnetic susceptibility measurements at high pressures were able to track magnetic ordering temperature only till 7 GPa in the hexagonal close packed (hcp) phase of Dy. Our studies indicate that the magnetic ordering temperature shows an abrupt drop of 80 K at the hcp-Sm phase transition followed by a gradual decrease that continues till 17 GPa. This is followed by a rapid increase in the magnetic ordering temperatures in the double hcp phase and finally leveling off in the distorted face centered cubic phase of Dy. Our studies reaffirm that 4f-shell remains localized in Dy and there is no loss of magnetic moment or 4f-shell delocalization for pressures up to 69 GPa.

  20. 22 CFR 171.3 - Public reading room.

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Public reading room. 171.3 Section 171.3... PUBLIC General Policy and Procedures § 171.3 Public reading room. A reading room providing public access..., NW., Washington, DC. The reading room contains material pertaining to access to information under...

  1. 22 CFR 171.4 - Electronic reading room.

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Electronic reading room. 171.4 Section 171.4... PUBLIC General Policy and Procedures § 171.4 Electronic reading room. The Department has established a... public reading room. This site also contains information on accessing records under the FOIA and...

  2. 22 CFR 171.42 - Requests and identifying information.

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Requests and identifying information. 171.42 Section 171.42 Foreign Relations DEPARTMENT OF STATE ACCESS TO INFORMATION AVAILABILITY OF INFORMATION AND RECORDS TO THE PUBLIC Ethics in Government Act Provisions § 171.42 Requests and identifying information...

  3. 34 CFR 303.171 - Supervision and monitoring of programs.

    Science.gov (United States)

    2010-07-01

    ... 34 Education 2 2010-07-01 2010-07-01 false Supervision and monitoring of programs. 303.171 Section 303.171 Education Regulations of the Offices of the Department of Education (Continued) OFFICE OF...-Application Requirements § 303.171 Supervision and monitoring of programs. Each application must...

  4. 14 CFR 171.269 - Marker beacon performance requirements.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Marker beacon performance requirements. 171.269 Section 171.269 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF... Landing System (ISMLS) § 171.269 Marker beacon performance requirements. ISMLS marker beacon equipment...

  5. 46 CFR 171.155 - Drainage of an open boat.

    Science.gov (United States)

    2010-10-01

    ... PERTAINING TO VESSELS CARRYING PASSENGERS Drainage of Weather Decks § 171.155 Drainage of an open boat. The deck within the hull of an open boat must drain to the bilge. Overboard drainage of the deck is not... 46 Shipping 7 2010-10-01 2010-10-01 false Drainage of an open boat. 171.155 Section 171.155...

  6. 46 CFR 171.106 - Wells in double bottoms.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Wells in double bottoms. 171.106 Section 171.106... PERTAINING TO VESSELS CARRYING PASSENGERS Additional Subdivision Requirements § 171.106 Wells in double bottoms. (a) This section applies to each vessel that has a well installed in a double bottom required...

  7. 46 CFR 160.171-5 - Independent laboratory.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 6 2010-10-01 2010-10-01 false Independent laboratory. 160.171-5 Section 160.171-5...: SPECIFICATIONS AND APPROVAL LIFESAVING EQUIPMENT Immersion Suits § 160.171-5 Independent laboratory. The approval and production tests in this subpart must be conducted by an independent laboratory accepted by...

  8. 19 CFR 171.1 - Petition for relief.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 2 2010-04-01 2010-04-01 false Petition for relief. 171.1 Section 171.1 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) FINES, PENALTIES, AND FORFEITURES Application for Relief § 171.1 Petition for relief. (a) To whom...

  9. 46 CFR 171.095 - Machinery space bulkhead.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Machinery space bulkhead. 171.095 Section 171.095... PERTAINING TO VESSELS CARRYING PASSENGERS Additional Subdivision Requirements § 171.095 Machinery space... transverse watertight bulkheads to separate the machinery space from the remainder of the vessel....

  10. Electrochemical behaviour of dysprosium in the eutectic LiCl-KCl at W and Al electrodes

    Energy Technology Data Exchange (ETDEWEB)

    Castrillejo, Y. [Dpto de Quimica Analitica, Facultad de Ciencias, Universidad de Valladolid, Prado de la Magdalena s/n, 47005 Valladolid (Spain)]. E-mail: ycastril@qa.uva.es; Bermejo, M.R. [Dpto de Quimica Analitica, Facultad de Ciencias, Universidad de Valladolid, Prado de la Magdalena s/n, 47005 Valladolid (Spain); Barrado, A.I. [Dpto de Quimica Analitica, Facultad de Ciencias, Universidad de Valladolid, Prado de la Magdalena s/n, 47005 Valladolid (Spain); Pardo, R. [Dpto de Quimica Analitica, Facultad de Ciencias, Universidad de Valladolid, Prado de la Magdalena s/n, 47005 Valladolid (Spain); Barrado, E. [Dpto de Quimica Analitica, Facultad de Ciencias, Universidad de Valladolid, Prado de la Magdalena s/n, 47005 Valladolid (Spain); Martinez, A.M. [Department of Materials Technology, Sem Saelands vei 6, 7491 Trondheim (Norway)

    2005-03-15

    The electrochemical behaviour of DyCl{sub 3} was studied in the eutectic LiCl-KCl at different temperatures. The cathodic reaction can be written:Dy(III)+3e-bar Dy(0)which can be divided in two very close cathodic steps:Dy(III)+1e-bar Dy(II)andDy(II)+2e-bar Dy(0)Transient electrochemical techniques, such as cyclic voltammetry, chronopotentiometry, and chronoamperometry were used in order to study the reaction mechanism and the transport parameters of electroactive species at a tungsten electrode. The results showed that in the eutectic LiCl-KCl, electrocrystallization of dysprosium seems to be the controlling electrochemical step. Chronoamperometric studies indicated instantaneous nucleation of dysprosium with three dimensional growth of the nuclei whatever the applied overpotential.Mass transport towards the electrode is a simple diffusion process, and the diffusion coefficient of the electroactive species, i.e. Dy(III), has been calculated. The validity of the Arrhenius law was also verified by plotting the variation of the logarithm of the diffusion coefficient versus 1/T.In addition, the electrode reactions of the LiCl-KCl-DyCl{sub 3} solutions at an Al wire were also investigated by cyclic voltammetry and open circuit chronopotentiometry. The redox potential of the Dy(III)/Dy couple at the Al electrode was observed at more positive potentials values than those at the inert electrode. This potential shift was thermodynamically analyzed by a lowering of activity of Dy in the metal phase due to the formation of intermetallic compounds.

  11. Structural, optical, thermal, mechanical and dielectric studies of Sulfamic acid single crystals: An influence of dysprosium (Dy3+) doping

    Science.gov (United States)

    Singh, Budhendra; Shkir, Mohd.; AlFaify, S.; Kaushal, Ajay; Nasani, Narendar; Bdikin, Igor; Shoukry, H.; Yahia, I. S.; Algarni, H.

    2016-09-01

    Sulfamic acid is a potential material that exhibits excellent optical properties. A good quality, pure and dysprosium (Dy3+) doped (2.5 and 5 mol %) Sulfamic acid (SA) single crystals were grown successfully by slow cooling method. Structural study revealed a slight change in its lattice parameters and volume, suggesting the successful incorporation of Dy3+ in crystal system. The existence of dysprosium in the system was also confirmed. Presence of various vibrational modes was confirmed. Optical transparency was found to have a significant effect with variation in the doping concentration. Furthermore, a marked enhancement in its mechanical parameters with doping was also identified by nanoindentation technique. Etching study was also performed on the grown crystals to study the etch-pit formation and growth mechanism. Effect of doping on the thermal stability was analysed. All the results were compared and discussed in detail to get insight of the effect of doping concentration on Sulfamic acid crystal.

  12. Optical trapping of ultracold dysprosium atoms: transition probabilities, dynamic dipole polarizabilities and van der Waals $C_6$ coefficients

    CERN Document Server

    Li, Hui; Dulieu, Olivier; Nascimbene, Sylvain; Lepers, Maxence

    2016-01-01

    The efficiency of optical trapping of ultracold atoms depend on the atomic dynamic dipole polarizability governing the atom-field interaction. In this article, we have calculated the real and imaginary parts of the dynamic dipole polarizability of dysprosium in the ground and first excited level. Due to the high electronic angular momentum of those two states, the polarizabilities possess scalar, vector and tensor contributions that we have computed, on a wide range of trapping wavelengths, using the sum-over-state formula. Using the same formalism, we have also calculated the $C_6$ coefficients characterizing the van der Waals interaction between two dysprosium atoms in the two lowest levels. We have computed the energies of excited states and the transition probabilities appearing in the sums, using a combination of \\textit{ab initio} and least-square-fitting techniques provided by the Cowan codes and extended in our group. Regarding the real part of the polarizability, for field frequencies far from atomic...

  13. Mixed (phthalocyaninato)(Schiff-base) di-dysprosium sandwich complexes. Effect of magnetic coupling on the SMM behavior.

    Science.gov (United States)

    Wang, Hailong; Liu, Chenxi; Liu, Tao; Zeng, Suyuan; Cao, Wei; Ma, Qi; Duan, Chunying; Dou, Jianmin; Jiang, Jianzhuang

    2013-11-21

    Reaction between Schiff-base ligand and half-sandwich complex M(Pc)(acac) led to the isolation of new sandwich-type mixed (phthalocyaninato)(Schiff-base) di-lanthanide compounds M2(Pc)2(L)H2O (M = Dy, Gd) (1, 2) [H2Pc = metal free phthalocyanine, Hacac = acetylacetone, H2L = N,N'-bis(3-methyloxysalicylidene)benzene-1,2-diamine] with the triple-decker molecular structure clearly revealed by single crystal X-ray diffraction analysis. For the comparative studies, sandwich triple-decker analogues with pure Schiff-base ligand M2(L)3H2O (M = Dy, Gd) (3, 4) were also prepared. Dynamic magnetic measurement result reveals the single-molecule magnet (SMM) nature of the di-dysprosium derivative 1, while the static magnetic investigation over both pure and the diamagnetic diluted samples of this compound discloses the interionic ferromagnetic coupling between the two dysprosium ions, which in turn effectively suppresses the QTM and enhances the energy barrier of this SMM. Nevertheless, comparative studies over the static magnetic properties of the di-dysprosium triple-decker complexes 1 and 3 indicate the stronger magnetic coupling between the two lanthanide ions in mixed (phthalocyaninato)(Schiff-base) species than in the pure Schiff-base triple-decker analogue, suggesting the special coordination sphere around the dysprosium ions in the former compound over the latter one on the more intense inter-ionic ferromagnetic coupling. As a very small step towards understanding the structure-property relationship, the present result will be surely helpful for the design and synthesis of the multinuclear lanthanide-based SMMs with good properties.

  14. Neutron capture measurements on {sup 171}Tm

    Energy Technology Data Exchange (ETDEWEB)

    Reifarth, R. E-mail: www.reifarth@lanl.gov; Haight, R.; Heil, M.; Fowler, M.M.; Kaeppeler, F.; Miller, G.G.; Rundberg, R.S.; Ullmann, J.L.; Wilhelmy, J.B

    2003-05-05

    A first proof of principal experiment of measuring neutron capture cross sections of radioactive isotopes was performed on {sup 171}Tm which has a half life of 1.92 years. This isotope was chosen for its ease of production and its radiation properties. The experiment was done at an 8 meter irradiation station at LANSCE using the pulse height weighting technique. A complemental activation measurement at FZK as well as a theoretical estimation indicated a significant background component above 1 keV neutron energy during the experiment at LANSCE.

  15. Evaluating United States and world consumption of neodymium, dysprosium, terbium, and praseodymium in final products

    Science.gov (United States)

    Hart, Matthew

    This paper develops scenarios of future rare-earth-magnet metal (neodymium, dysprosium, terbium, and praseodymium) consumption in the permanent magnets used in wind turbines and hybrid electric vehicles. The scenarios start with naive base-case scenarios for growth in wind-turbine and hybrid-electric-vehicle sales over the period 2011 to 2020, using historical data for each good. These naive scenarios assume that future growth follows time trends in historical data and does not depend on any exogenous variable. Specifically, growth of each technological market follows historical time trends, and the amount of rare earths used per unit of technology remains fixed. The chosen reference year is 2010. Implied consumptions of the rare earth magnet metals are calculated from these scenarios. Assumptions are made for the material composition of permanent magnets, the market share of permanent-magnet wind turbines and vehicles, and magnet weight per unit of technology. Different scenarios estimate how changes in factors like the material composition of magnets, growth of the economy, and the price of a substitute could affect future consumption. Each scenario presents a different method for reducing rare earth consumption and could be interpreted as potential policy choices. In 2010, the consumption (metric tons, rare-earth-oxide equivalent) of each rare-earth-magnet metal was as follows. Total neodymium consumption in the world for both technologies was 995 tons; dysprosium consumption was 133 tons; terbium consumption was 50 tons; praseodymium consumption was zero tons. The base scenario for wind turbines shows there could be strong, exponential growth in the global wind turbine market. New U.S. sales of hybrid vehicles would decline (in line with the current economic recession) while non-U.S. sales increase through 2020. There would be an overall increase in the total amount of magnetic rare earths consumed in the world. Total consumption of each rare earth in the short

  16. Luminescence features of dysprosium and phosphorus oxide co-doped lithium magnesium borate glass

    Science.gov (United States)

    Hashim, S.; Mhareb, M. H. A.; Ghoshal, S. K.; Alajerami, Y. S. M.; Saripan, M. I.; Bradley, D. A.

    2017-08-01

    Lithium magnesium borate (LMB) glass system co-doped with the oxides of dysprosium (Dy2O3) and phosphorus (P2O5) were synthesized using melt-quenching method. Prepared samples were characterized using various techniques to determine the effects of co-dopants concentration variation on their thermoluminescence (TL) and photoluminescence (PL) properties. TL glow curves of LMB:0.5Dy sample revealed a single prominent peak at Tm=190 °C, where TL intensity was enhanced by a factor of 2.5 with the increase of P2O5 concentration up to 1 mol%. This enhancement was accompanied by a shift in Tm towards higher temperature. Good linearity in the range of 1-100 Gy with linear correlation coefficient of 0.998 was achieved. PL spectra displayed two significant peaks centred at 481 nm and 573 nm. These attractive luminescence features of the proposed glass system may be useful for the development of radiation dosimetry.

  17. Single-molecule magnet behavior for an antiferromagnetically superexchange-coupled dinuclear dysprosium(III) complex.

    Science.gov (United States)

    Long, Jérôme; Habib, Fatemah; Lin, Po-Heng; Korobkov, Ilia; Enright, Gary; Ungur, Liviu; Wernsdorfer, Wolfgang; Chibotaru, Liviu F; Murugesu, Muralee

    2011-04-13

    A family of five dinuclear lanthanide complexes has been synthesized with general formula [Ln(III)(2)(valdien)(2)(NO(3))(2)] where (H(2)valdien = N1,N3-bis(3-methoxysalicylidene)diethylenetriamine) and Ln(III) = Eu(III)1, Gd(III)2, Tb(III)3, Dy(III)4, and Ho(III)5. The magnetic investigations reveal that 4 exhibits single-molecule magnet (SMM) behavior with an anisotropic barrier U(eff) = 76 K. The step-like features in the hysteresis loops observed for 4 reveal an antiferromagnetic exchange coupling between the two dysprosium ions. Ab initio calculations confirm the weak antiferromagnetic interaction with an exchange constant J(Dy-Dy) = -0.21 cm(-1). The observed steps in the hysteresis loops correspond to a weakly coupled system similar to exchange-biased SMMs. The Dy(2) complex is an ideal candidate for the elucidation of slow relaxation of the magnetization mechanism seen in lanthanide systems.

  18. A comparative study of donor formation in dysprosium, holmium, and erbium implanted silicon

    Energy Technology Data Exchange (ETDEWEB)

    Emtsev, V.V.; Emtsev, V.V. Jr.; Poloskin, D.S.; Shek, E.I.; Sobolev, N.A. [Division of Solid State Electronics, Ioffe Physicotechnical Institute, Russian Academy of Sciences, 194021 St. Petersburg (Russian Federation)

    1998-12-01

    Formation of donor centers in Czochralski grown silicon doped with dysprosium, holmium, and erbium is discussed. Donor states of three kinds are introduced in the implanted layers after annealing at T=700C. Shallow donor states with ionization energies between 20 and 40 meV are attributed to oxygen -related thermal donors. Other donor centers in the energy range of E{sub C}-(60...70) meV and E{sub C}-(100...120) meV appear to be dependent on dopants. After a 900C anneal strong changes in the donor formation are observed only in silicon doped with erbium. Instead of donors at E{sub C}-(118{+-}5) meV, new donor centres at E{sub C}-(145{+-}5) meV are formed. Reportedly, the latter ones are involved in the excitation process of the Er{sup 3+} ions with a characteristic luminescence line at {approx}1.54 {mu}m. (Copyright (c) 1998 Elsevier Science B.V., Amsterdam. All rights reserved.)

  19. Thermoluminescence properties of lithium magnesium borate glasses system doped with dysprosium oxide.

    Science.gov (United States)

    Mhareb, M H A; Hashim, S; Ghoshal, S K; Alajerami, Y S M; Saleh, M A; Razak, N A B; Azizan, S A B

    2015-12-01

    We report the impact of dysprosium (Dy(3+)) dopant and magnesium oxide (MgO) modifier on the thermoluminescent properties of lithium borate (LB) glass via two procedures. The thermoluminescence (TL) glow curves reveal a single prominent peak at 190 °C for 0.5 mol% of Dy(3+). An increase in MgO contents by 10 mol% enhances the TL intensity by a factor of 1.5 times without causing any shift in the maximum temperature. This enhancement is attributed to the occurrence of extra electron traps created via magnesium and the energy transfer to trivalent Dy(3+) ions. Good linearity in the range of 0.01-4 Gy with a linear correlation coefficient of 0.998, fading as low as 21% over a period of 3 months, excellent reproducibility without oven annealing and tissue equivalent effective atomic numbers ~8.71 are achieved. The trap parameters, including geometric factor (μg), activation energy (E) and frequency factor (s) associated with LMB:Dy are also determined. These favorable TL characteristics of prepared glasses may contribute towards the development of Li2O-MgO-B2O3 radiation dosimeters.

  20. Optical properties of zinc borotellurite glass doped with trivalent dysprosium ion

    Science.gov (United States)

    Ami Hazlin, M. N.; Halimah, M. K.; Muhammad, F. D.; Faznny, M. F.

    2017-04-01

    The zinc borotellurite doped with dysprosium oxide glass samples with chemical formula {[(TeO2) 0 . 7(B2O3) 0 . 3 ] 0 . 7(ZnO) 0 . 3 } 1 - x(Dy2O3)x (where x=0.01, 0.02, 0.03, 0.04 and 0.05 M fraction) were prepared by using conventional melt quenching technique. The structural and optical properties of the proposed glass systems were characterized by using X-ray diffraction (XRD) spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy, and UV-VIS spectroscopy. The amorphous nature of the glass systems is confirmed by using XRD technique. The infrared spectra of the glass systems indicate three obvious absorption bands which are assigned to BO3 and TeO4 vibrational groups. Based on the absorption spectra obtained, the direct and indirect optical band gaps, as well as the Urbach energy were calculated. It is observed that both the direct and indirect optical band gaps increase with the concentration of Dy3+ ions. On the other hand, the Urbach energy is observed to decrease as the concentration of Dy3+ ions increases.

  1. Isolation of {sup 163}Ho from dysprosium target material by HPLC for neutrino mass measurements

    Energy Technology Data Exchange (ETDEWEB)

    Mocko, Veronika; Taylor, Wayne A.; Nortier, Francois M.; Engle, Jonathan W.; Pollington, Anthony D.; Kunde, Gerd J.; Rabin, Michael W.; Birnbaum, Eva R. [Los Alamos National Laboratory, Los Alamos, NM (United States). Chemistry Div.; Barnhart, Todd E.; Nickles, Robert J. [Univ. Wisconsinn, Madison, WI (United States). Dept. of Medical Physics

    2015-07-01

    The rare earth isotope {sup 163}Ho is of interest for neutrino mass measurements. This report describes the isolation of {sup 163}Ho from a proton-irradiated dysprosium target and its purification. A Dy metal target was irradiated with 16 MeV protons for 10 h. After target dissolution, {sup 163}Ho was separated from the bulk Dy via cation-exchange high performance liquid chromatography using 70 mmol dm{sup -3} α-hydroxyisobutyric acid as the mobile phase. Subsequent purification of the collected Ho fraction was performed to remove the α-hydroxyisobutyrate chelating agent and to concentrate the Ho in a low ionic strength aqueous matrix. The final solution was characterized by MC-ICP-MS to determine the {sup 163}Ho/{sup 165}Ho ratio, {sup 163}Ho and the residual Dy content. The HPLC purification process resulted in a decontamination factor 1.4 x 10{sup 5} for Dy. The isolated Ho fraction contained 24.8 ± 1.3 ng of {sup 163}Ho corresponding to holmium recovery of 72 ± 3%.

  2. 40 CFR 63.171 - Standards: Delay of repair.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 9 2010-07-01 2010-07-01 false Standards: Delay of repair. 63.171... Standards for Organic Hazardous Air Pollutants for Equipment Leaks § 63.171 Standards: Delay of repair. (a) Delay of repair of equipment for which leaks have been detected is allowed if repair within 15 days...

  3. 14 CFR 171.111 - Ground standards and tolerances.

    Science.gov (United States)

    2010-01-01

    ... specified in §§ 171.109 and 171.111. (d) Insulation resistance. The insulation resistance of all coaxial... change in course sector width to a value differing by ±17 percent or more from the standard. (6) Monitor... in facility shutdown. It does not relate to the responsiveness of the maintenance organization. (l...

  4. 25 CFR 224.171 - Who may rescind a TERA?

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Who may rescind a TERA? 224.171 Section 224.171 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR ENERGY AND MINERALS TRIBAL ENERGY RESOURCE... rescind a TERA? Only a tribe may rescind a TERA....

  5. 19 CFR 171.32 - Acceptance of offers in compromise.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 2 2010-04-01 2010-04-01 false Acceptance of offers in compromise. 171.32 Section... OF THE TREASURY (CONTINUED) FINES, PENALTIES, AND FORFEITURES Offers in Compromise § 171.32 Acceptance of offers in compromise. An offer in compromise will be considered accepted only when the...

  6. 46 CFR 171.100 - Shaft tunnels and stern tubes.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Shaft tunnels and stern tubes. 171.100 Section 171.100... stern tubes. (a) Stern tubes in each of the following vessels must be enclosed in watertight spaces: (1... passengers on an international voyage. (b) The watertight seal in the bulkhead between the stern tube space...

  7. 22 CFR 171.23 - Declassification in the public interest.

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Declassification in the public interest. 171.23 Section 171.23 Foreign Relations DEPARTMENT OF STATE ACCESS TO INFORMATION AVAILABILITY OF INFORMATION AND... public interest in disclosure of the information, and in these cases the information should...

  8. 49 CFR 171.10 - Units of measure.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Units of measure. 171.10 Section 171.10... measure. (a) General. To ensure compatibility with international transportation standards, most units of measure in this subchapter are expressed using the International System of Units (“SI” or metric). Where...

  9. 48 CFR 217.171 - Multiyear contracts for services.

    Science.gov (United States)

    2010-10-01

    ... instructor skills (e.g., training for pilots and aircrew members or foreign language training). (iv) Base... 48 Federal Acquisition Regulations System 3 2010-10-01 2010-10-01 false Multiyear contracts for services. 217.171 Section 217.171 Federal Acquisition Regulations System DEFENSE ACQUISITION...

  10. 19 CFR 171.3 - Oral presentations seeking relief.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 2 2010-04-01 2010-04-01 false Oral presentations seeking relief. 171.3 Section... OF THE TREASURY (CONTINUED) FINES, PENALTIES, AND FORFEITURES Application for Relief § 171.3 Oral presentations seeking relief. (a) For violation of section 592 or section 593A. If the penalty incurred is for a...

  11. Acute dysprosium toxicity to Daphnia pulex and Hyalella azteca and development of the biotic ligand approach.

    Science.gov (United States)

    Vukov, Oliver; Smith, D Scott; McGeer, James C

    2016-01-01

    The toxicological understanding of rare earth elements (REEs) in the aquatic environment is very limited but of increasing concern. The objective of this research is to compare the toxicological effect of the REE dysprosium to the freshwater invertebrates Daphnia pulex and Hyalella azteca and in the more sensitive organism, understand the toxicity modifying influence of Ca, Na, Mg, pH and dissolved organic matter (DOM). Standard methods (Environment Canada) were followed for testing and culture in media of intermediate hardness (60mg CaCO3 mg/L) at pH 7.8 with Ca at 0.5, Na 0.5, Mg 0.125 (mM) and 23°C. Acute toxicity tests were done with azteca and D. pulex revealed Hyalella to be 1.4 times more sensitive than Daphnia. Additions of Ca and Na but not Mg provided significant protection against Dy toxicity to Hyalella. Similarly, low pH was associated with reduction in toxicity. Exposures which were pH buffered with and without MOPS were significantly different and indicated that MOPS enhanced Dy toxicity. DOM also mitigated Dy toxicity. Biotic ligand based parameters (LogK values) were calculated based on free ion relationships as determined by geochemical equilibrium modeling software (WHAM ver. 7.02). The logK value for Dy(3+) toxicity to Hyalella was 7.75 while the protective influence of Ca and Na were 3.95 and 4.10, respectively. This study contributes data towards the development of site specific water quality guidelines and criteria for Dy and possibly REEs in general and offers insight into the complex bio-geochemical nature of this element.

  12. Optical trapping of ultracold dysprosium atoms: transition probabilities, dynamic dipole polarizabilities and van der Waals C 6 coefficients

    Science.gov (United States)

    Li, H.; Wyart, J.-F.; Dulieu, O.; Nascimbène, S.; Lepers, M.

    2017-01-01

    The efficiency of the optical trapping of ultracold atoms depends on the atomic dynamic dipole polarizability governing the atom-field interaction. In this article, we have calculated the real and imaginary parts of the dynamic dipole polarizability of dysprosium in the ground and first excited levels. Due to the high electronic angular momentum of those two states, the polarizabilities possess scalar, vector and tensor contributions that we have computed, on a wide range of trapping wavelengths, using the sum-over-state formula. Using the same formalism, we have also calculated the C 6 coefficients characterizing the van der Waals interaction between two dysprosium atoms in the two lowest levels. We have computed the energies of excited states and the transition probabilities appearing in the sums, using a combination of ab initio and least-square-fitting techniques provided by the Cowan codes and extended in our group. Regarding the real part of the polarizability, for field frequencies far from atomic resonances, the vector and tensor contributions are two-orders-of-magnitude smaller than the scalar contribution, whereas for the imaginary part, the vector and tensor contributions represent a noticeable fraction of the scalar contribution. Finally, our anisotropic C 6 coefficients are much smaller than those published in the literature.

  13. A thirty second isomer in {sup 171}Hf

    Energy Technology Data Exchange (ETDEWEB)

    Campbell, P.; Billowes, J.; Cooper, T.G.; Grant, I.S.; Pearson, M.R.; Wheeler, P.D. [Schuster Laboratory, University of Manchester, M13 9PL (United Kingdom); Cochrane, E.C.A.; Cooke, J.L.; Evans, D.E.; Griffith, J.A.R.; Persson, J.R.; Richardson, D.S.; Tungate, G.; Zybert, L. [School of Physics and Space Research, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom); Dendooven, P.; Honkanen, A.; Huhta, M.; Oinonen, M.; Penttilae, H.; Aeystoe, J. [Accelerator Laboratory, University of Jyvaeskylae, PL 35 Jyvaeskylae SF-403 51 (Finland)

    1997-09-01

    An isomer has been detected in {sup 171}Hf with a half-life of T{sub 1/2} 29.5(9) s. The state was populated in the {sup 170}Yb({alpha},3n){sup 171m}Hf reaction at a beam energy of E{sub {alpha}} = 50 MeV in an on-line ion guide isotope separator. The isomeric {sup 171m}Hf{sup +} beam was extracted from the ion guide, mass-analysed and implanted in the surface of a microchannel-plate. The half-life of the collected activity was measured from the decay of the microchannel-plate count rate. We associate the isomer with the first excited state in {sup 171}Hf with spin 1/2{sup -} at an excitation energy of 22(2) keV. (author)

  14. 22 CFR 171.44 - Improper use of reports.

    Science.gov (United States)

    2010-04-01

    ... PUBLIC Ethics in Government Act Provisions § 171.44 Improper use of reports. (a) The Attorney General may... general public; (3) For determining or establishing the credit rating of any individual; (4) For...

  15. 46 CFR 160.171-3 - Incorporation by reference.

    Science.gov (United States)

    2010-10-01

    ...: SPECIFICATIONS AND APPROVAL LIFESAVING EQUIPMENT Immersion Suits § 160.171-3 Incorporation by reference. (a.... National Bureau of Standards Special Publication 440—Color, Universal Language and Dictionary of Names...

  16. Potential probiotic of Lactobacillus johnsonii LT171 for chicken ...

    African Journals Online (AJOL)

    STORAGESEVER

    2009-11-02

    Nov 2, 2009 ... ISSN 1684–5315 © 2009 Academic Journals. Full Length ... chicken nutrition. Hamidreza ... probiotic properties of L. johnsonii LT171 for chicken nutrition. Hence this ..... resistance to pathogens and performance in animals.

  17. 14 CFR 171.23 - Requests for IFR procedure.

    Science.gov (United States)

    2010-01-01

    ...) NAVIGATIONAL FACILITIES NON-FEDERAL NAVIGATION FACILITIES Nondirectional Radio Beacon Facilities § 171.23... beacon facility that he owns must submit the following information with that request: (1) A...

  18. Acute dysprosium toxicity to Daphnia pulex and Hyalella azteca and development of the biotic ligand approach

    Energy Technology Data Exchange (ETDEWEB)

    Vukov, Oliver, E-mail: vuko3930@mylaurier.ca [Biology Department, Wilfrid Laurier University, Waterloo, Ontario N2L 3C5 (Canada); Smith, D. Scott [Chemistry Department, Wilfrid Laurier University, Waterloo, Ontario N2L 3C5 (Canada); McGeer, James C. [Biology Department, Wilfrid Laurier University, Waterloo, Ontario N2L 3C5 (Canada)

    2016-01-15

    The toxicological understanding of rare earth elements (REEs) in the aquatic environment is very limited but of increasing concern. The objective of this research is to compare the toxicological effect of the REE dysprosium to the freshwater invertebrates Daphnia pulex and Hyalella azteca and in the more sensitive organism, understand the toxicity modifying influence of Ca, Na, Mg, pH and dissolved organic matter (DOM). Standard methods (Environment Canada) were followed for testing and culture in media of intermediate hardness (60 mg CaCO{sub 3} mg/L) at pH 7.8 with Ca at 0.5, Na 0.5, Mg 0.125 (mM) and 23 °C. Acute toxicity tests were done with <24 h old neonates for 48 h in the case of D. pulex and with 2–9 days old offspring for 96 h tests with Hyalella. The potential protective effect of cationic competition was tested with Ca (0.5–2.0 mM), Na (0.5–2.0 mM) and Mg (0.125–0.5 mM). The effect of pH (6.5–8.0) and Suwannee River DOM complexation (at dissolved organic carbon (DOC) concentrations of 9 and 13 mg C/L) were evaluated. Dissolved Dy concentrations were lower than total (unfiltered) indicating precipitation, particularly at higher concentrations. Acute toxicity of Dy to H. azteca and D. pulex revealed Hyalella to be 1.4 times more sensitive than Daphnia. Additions of Ca and Na but not Mg provided significant protection against Dy toxicity to Hyalella. Similarly, low pH was associated with reduction in toxicity. Exposures which were pH buffered with and without MOPS were significantly different and indicated that MOPS enhanced Dy toxicity. DOM also mitigated Dy toxicity. Biotic ligand based parameters (Log K values) were calculated based on free ion relationships as determined by geochemical equilibrium modeling software (WHAM ver. 7.02). The log K value for Dy{sup 3+} toxicity to Hyalella was 7.75 while the protective influence of Ca and Na were 3.95 and 4.10, respectively. This study contributes data towards the development of site specific

  19. White light emission of dysprosium doped lanthanum calcium phosphate oxide and oxyfluoride glasses

    Science.gov (United States)

    Luewarasirikul, N.; Kim, H. J.; Meejitpaisan, P.; Kaewkhao, J.

    2017-04-01

    Lanthanum calcium phosphate oxide and oxyfluoride glasses doped with dysprosium oxide were prepared by melt-quenching technique with chemical composition 20La2O3:10CaO:69P2O5:1Dy2O3 and 20La2O3:10CaF2:69P2O5:1Dy2O3. The physical, optical and luminescence properties of the glass samples were studied to evaluate their potential to using as luminescence materials for solid-state lighting applications. The density, molar volume and refractive index of the glass samples were carried out. The optical and luminescence properties were studied by investigating absorption, excitation, and emission spectra of the glass samples. The absorption spectra were investigated in the UV-Vis-NIR region from 300 to 2000 nm. The excitation spectra observed under 574 nm emission wavelength showed the highest peak centered at 349 nm (6H15/2 → 6P7/2). The emission spectra, excited with 349 nm excitation wavelength showed two major peaks corresponding to 482 nm blue emission (4F9/2 → 6H15/2) and 574 nm yellow emission (4F9/2 → 6H13/2). The experimental lifetime were found to be 0.539 and 0.540 for oxide and oxyfluoride glass sample, respectively. The x,y color coordinates under 349 nm excitation wavelength were (0.38, 0.43) for both glass samples, that be plotted in white region of CIE 1931 chromaticity diagram. The CCT values obtained from the glass samples are 4204 K for oxide glass and 4228 K for oxyfluoride glass corresponding to the commercial cool white light (3100-4500 K). Judd-Ofelt theory had also been employed to obtain the J-O parameters (Ω2, Ω4 and Ω6), oscillator strength, radiative transition possibility, stimulated emission cross section and branching ratio. The Ω2 > Ω4 > Ω6 trend of J-O parameters of both glass samples may indicate the good quality of a glass host for using as optical device application. Temperature dependence of emission spectra was studied from 300 K to 10 K and found that the intensity of the emission peak was found to be increased with

  20. Limits on violations of Lorentz symmetry and the Einstein equivalence principle using radio-frequency spectroscopy of atomic dysprosium.

    Science.gov (United States)

    Hohensee, M A; Leefer, N; Budker, D; Harabati, C; Dzuba, V A; Flambaum, V V

    2013-08-02

    We report a joint test of local Lorentz invariance and the Einstein equivalence principle for electrons, using long-term measurements of the transition frequency between two nearly degenerate states of atomic dysprosium. We present many-body calculations which demonstrate that the energy splitting of these states is particularly sensitive to violations of both special and general relativity. We limit Lorentz violation for electrons at the level of 10(-17), matching or improving the best laboratory and astrophysical limits by up to a factor of 10, and improve bounds on gravitational redshift anomalies for electrons by 2 orders of magnitude, to 10(-8). With some enhancements, our experiment may be sensitive to Lorentz violation at the level of 9 × 10(-20).

  1. Nonlinear optical properties of lutetium and dysprosium bisphthalocyanines at 1550 nm with femto- and nanosecond pulse excitation

    Science.gov (United States)

    Plekhanov, A. I.; Basova, T. V.; Parkhomenko, R. G.; Gürek, A. G.

    2017-02-01

    In this work, the nonlinear optical properties of unsubstituted lutetium (LuPc2) and dysprosium (DyPc2) bisphthalocyanines as well as octasubstituted Lu(PcR8)2 derivative with R=-S(C6H13) were studied at a wavelength of 1550 nm with 10 ns and 300 fs pulses. Based on Z-scan measurements the nonlinear absorption and refraction coefficient as well as the nature of nonlinear optical properties were analyzed for these materials. Open aperture Z-scan indicates strong two-photon absorption in all three bisphthalocyanines in nano- and femtosecond regimes. With good nonlinear optical coefficients, bisphthalocyanines of rare earth elements are expected to be promising materials for the creation of optical limiters.

  2. Spectroscopic data of the 1.8-, 2.9-, and 4.3- mu m transitions in dysprosium-doped gallium lanthanum sulfide glass

    Science.gov (United States)

    Schweizer, T.; Hewak, D. W.; Samson, B. N.; Payne, D. N.

    1996-10-01

    Infrared emission at 1.8, 2.9, and 4.3 mu m is measured in dysprosium-doped gallium lanthanum sulfide (Ga:La:S) glass excited at 815 nm. Emission cross sections were calculated by Judd-Ofelt analysis, the Fuchtbauer-Ladenburg equation, and the theory of McCumber. The sigma tau value for the 4.3- mu m transition is \\similar 4000 times larger in the Ga:La:S glass than in a dysprosium-doped LiYF4 crystal, which has lased on this transition. The large sigma tau value and the recently reported ability of Ga:La:S glass to be fabricated into fiber form show the potential for an efficient, low-threshold mid-infrared fiber laser. The fluorescence peak at 4.3 mu m coincides with the fundamental absorption of atmospheric carbon dioxide, making the glass a potential laser source for gas-sensing applications.

  3. Spectroscopic data of the 1.8-, 2.9-, and 4.3-microm transitions in dysprosium-doped gallium lanthanum sulfide glass.

    Science.gov (United States)

    Schweizer, T; Hewak, D W; Samson, B N; Payne, D N

    1996-10-01

    Infrared emission at 1.8, 2.9, and 4.3 microm is measured in dysprosium-doped gallium lanthanum sulfide (Ga:La:S) glass excited at 815 nm. Emission cross sections were calculated by Judd-Ofelt analysis, the Füchtbauer- Ladenburg equation, and the theory of McCumber. The sigmatau value for the 4.3-microm transition is ~4000 times larger in the Ga:La:S glass than in a dysprosium-doped LiYF(4) crystal, which has lased on this transition. The large sigmatau value and the recently reported ability of Ga:La:S glass to be fabricated into fiber form show the potential for an efficient, low-threshold mid-infrared fiber laser. The f luorescence peak at 4.3 microm coincides with the fundamental absorption of atmospheric carbon dioxide, making the glass a potential laser source for gas-sensing applications.

  4. On-line complexation/cloud point preconcentration for the sensitive determination of dysprosium in urine by flow injection inductively coupled plasma-optical emission spectrometry

    Energy Technology Data Exchange (ETDEWEB)

    Ortega, Claudia; Cerutti, Soledad; Silva, Maria F. [Departamento de Quimica Analitica, Facultad de Quimica, Bioquimica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700, San Luis (Argentina); Olsina, Roberto A.; Martinez, Luis D. [Departamento de Quimica Analitica, Facultad de Quimica, Bioquimica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700, San Luis (Argentina); Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Avda. Rivadavia 1917, CP C1033AAJJ, Buenos Aires (Argentina)

    2003-01-01

    An on-line dysprosium preconcentration and determination system based on the hyphenation of cloud point extraction (CPE) to flow injection analysis (FIA) associated with ICP-OES was studied. For the preconcentration of dysprosium, a Dy(III)-2-(5-bromo-2-pyridylazo)-5-diethylaminophenol complex was formed on-line at pH 9.22 in the presence of nonionic micelles of PONPE-7.5. The micellar system containing the complex was thermostated at 30 C in order to promote phase separation, and the surfactant-rich phase was retained in a microcolumn packed with cotton at pH 9.2. The surfactant-rich phase was eluted with 4 mol L{sup -1} nitric acid at a flow rate of 1.5 mL min{sup -1}, directly in the nebulizer of the plasma. An enhancement factor of 50 was obtained for the preconcentration of 50 mL of sample solution. The detection limit value for the preconcentration of 50 mL of aqueous solution of Dy was 0.03 {mu}g L{sup -1}. The precision for 10 replicate determinations at the 2.0 {mu}g L{sup -1}Dy level was 2.2% relative standard deviation (RSD), calculated from the peak heights obtained. The calibration graph using the preconcentration system for dysprosium was linear with a correlation coefficient of 0.9994 at levels near the detection limits up to at least 100 {mu}g L {sup -1}. The method was successfully applied to the determination of dysprosium in urine. (orig.)

  5. Phenotype abnormality: 171 [Arabidopsis Phenome Database[Archive

    Lifescience Database Archive (English)

    Full Text Available 171 http://metadb.riken.jp/db/SciNetS_ria224i/cria224u1ria224u677i decreased inten...sity for state of undulation in organ named root ... root ... decreased intensity ... undulate ...

  6. 14 CFR 171.115 - Maintenance and operations requirements.

    Science.gov (United States)

    2010-01-01

    ... Facility (SDF) § 171.115 Maintenance and operations requirements. (a) The owner of the facility shall... procedures and the use of specialized test equipment. (b) The SDF must be designed and maintained so that the... within the facility that may adversely affect SDF operations. (2) Maintenance and operations...

  7. 14 CFR 171.203 - Requests for IFR procedure.

    Science.gov (United States)

    2010-01-01

    ... proposed maintenance organization and a maintenance manual that meets the requirements of § 171.211. (4) A... acceptable level of operational reliability, and an acceptable standard of performance. Previous equivalent... changes in the facility or the maintenance manual or maintenance organization. The owner shall then...

  8. 14 CFR 171.103 - Requests for IFR procedure.

    Science.gov (United States)

    2010-01-01

    ... facility. (3) A proposed maintenance organization and a maintenance manual that meets the requirements of... facility has an acceptable level of operational reliability as prescribed in § 171.111(k), and an... the results and of any required changes in the facility or the maintenance manual or maintenance...

  9. 21 CFR 171.7 - Withdrawal of petition without prejudice.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Withdrawal of petition without prejudice. 171.7... Withdrawal of petition without prejudice. (a) In some cases the Commissioner will notify the petitioner that... clarification or the obtaining of additional data. This withdrawal will be without prejudice to a future...

  10. 40 CFR 141.171 - Criteria for avoiding filtration.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 22 2010-07-01 2010-07-01 false Criteria for avoiding filtration. 141... PROGRAMS (CONTINUED) NATIONAL PRIMARY DRINKING WATER REGULATIONS Enhanced Filtration and Disinfection-Systems Serving 10,000 or More People § 141.171 Criteria for avoiding filtration. In addition to...

  11. GPR171 expression enhances proliferation and metastasis of lung cancer cells

    Science.gov (United States)

    Dho, So Hee; Lee, Kwang-Pyo; Jeong, Dongjun; Kim, Chang-Jin; Chung, Kyung-Sook; Kim, Ji Young; Park, Bum-Chan; Park, Sung Sup; Kim, Seon-Young; Kwon, Ki-Sun

    2016-01-01

    G protein-coupled receptors (GPCRs) are among the most significant therapeutic targets and some of them promote the growth and metastasis of cancer. Here, we show that an increase in the levels of GPR171 is crucial for lung cancer tumor progression in vitro and in vivo. Immunostaining of clinical samples indicated that GPR171 was overexpressed in 46.8% of lung carcinoma tissues. Depletion of GPR171 with an anti-GPR171 antibody decreased proliferation of lung carcinoma cells and attenuated tumor progression in a mouse xenograft model. Knockdown of GPR171 also inhibited migration and invasion of the lung cancer cell lines. Notably, inhibition of GPR171 synergistically enhanced the tumoricidal activity of an epidermal growth factor receptor (EGFR) inhibitor in lung cancer cells. These results indicate that GPR171 blockade is a promising antineoplastic strategy and provide a preclinical rationale for combined inhibition of GPR171 and EGFR. PMID:26760963

  12. Synthesis and Crystal Structure of Tri-(2-mercaptopyridine N-oxide)bis(dimethyl sulfoxide) Dysprosium(Ⅲ)

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    A range of rare earth metal complexes of 2-mercaptopyridine N-oxide (Hmpo) have been synthesized, and studied by elemental analysis and IR spectroscopic technique. Crystal structure of Dy(mpo)3(DMSO)2 (DMSO = dimethyl sulfoxide) has been determined. The complex crystallizes in the triclinic system, space group Pī with lattice parameters: a = 9.602(3), b = 9.803(3), c = 15.498(5)A, α= 89.51(1), β= 85.73(1), γ= 62.99(1)°, Dc = 1.787 g/cm3, C19H24N3O5S5Dy, Mr = 697.21, Z = 2, F(000) = 690, μ = 3.321mm-1, the final R = 0.0237 and wR = 0.0587 for 4116 reflections with I>σ2(I). The coordination number of dysprosium Ⅲ is eight, and its coordination geometry is a somewhat distorted square antiprism with O(3), O(4), O(5), S(3) and O(1), O(2), S(1), S(2) at the tetragonal bases (dihedral angle between their mean planes is 2.9(1)0). Around the Dy atom, three five-membered ring planes (Dy, O, N, C, S) make the dihedral angles of 74.42, 11.31 and 83.72, respectively.

  13. Photo-, cathodo- and thermoluminescent properties of dysprosium-doped HfO2 films deposited by ultrasonic spray pyrolysis.

    Science.gov (United States)

    Manríquez, R Reynoso; Góngora, J A I Díaz; Guzmán-Mendoza, J; Montalvo, T Rivera; Olguín, J C Guzmán; Ramírez, P V Cerón; García-Hipólito, M; Falcony, C

    2014-09-01

    In this work, the photoluminescent (PL), cathodoluminescent (CL) and thermoluminescent (TL) properties of hafnium oxide films doped with trivalent dysprosium ions are reported. The films were deposited on glass substrates at temperatures ranging from 300 to 600°C, using chlorides as precursor reagents. The surface morphology of films showed a veins shaped microstructure at low deposition temperatures, while at higher temperatures the formation of spherical particles was observed on the surface. X-ray diffraction showed the presence of HfO2 monoclinic phase in the films deposited at temperatures greater than 400°C. The PL and CL spectra of the doped films showed the highest emission band centered at 575nm corresponding to the transitions (4)F9/2→(6)H13/2, which is a characteristic transition of Dy(3+) ion. The greatest emission intensities were observed in samples doped with 1 atomic percent (at%) of DyCl3 in the precursor solution. Regarding the TL behavior, the glow curve of HfO2:Dy(+3) films exhibited spectrum with one broad band centered at about 150°C. The highest intensity TL response was observed on the films deposited at 500°C. Copyright © 2014 Elsevier Ltd. All rights reserved.

  14. Workplace testing of the new single sphere neutron spectrometer based on Dysprosium activation foils (Dy-SSS)

    Science.gov (United States)

    Bedogni, R.; Gómez-Ros, J. M.; Esposito, A.; Gentile, A.; Chiti, M.; Palacios-Pérez, L.; Angelone, M.; Tana, L.

    2012-08-01

    A photon insensitive passive neutron spectrometer consisting of a single moderating polyethylene sphere with Dysprosium activation foils arranged along three perpendicular axes was designed by CIEMAT and INFN. The device is called Dy-SSS (Dy foil-based Single Sphere Spectrometer). It shows nearly isotropic response in terms of neutron fluence up to 20 MeV. The first prototype, previously calibrated with 14 MeV neutrons, has been recently tested in workplaces having different energy and directional distributions. These are a 2.5 MeV nearly mono-chromatic and mono-directional beam available at the ENEA Frascati Neutron Generator (FNG) and the photo-neutron field produced in a 15 MV Varian CLINAC DHX medical accelerator, located in the Ospedale S. Chiara (Pisa). Both neutron spectra are known through measurements with a Bonner Sphere Spectrometer. In both cases the experimental response of the Dy-SSS agrees with the reference data. Moreover, it is demonstrated that the spectrometric capability of the new device are independent from the directional distribution of the neutron field. This opens the way to a new generation of moderation-based neutron instruments, presenting all advantages of the Bonner sphere spectrometer without the disadvantage of the repeated exposures. This concept is being developed within the NESCOFI@BTF project of INFN (Commissione Scientifica Nazionale 5).

  15. Ferroelectric properties of dysprosium-doped Bi4Ti3O12 thin films crystallized in various atmospheres

    Institute of Scientific and Technical Information of China (English)

    CHENG Chuan-pin; TANG Ming-hua; YE Zhi; ZHOU Yic-hun; ZHENG Xue-jun; ZHONG Xiang-li; HU Zeng-shun

    2006-01-01

    Dysprosium-doped Bi4Ti3O12 (Bi3.4Dy0.6Ti3O12,BDT) ferroelectric thin films were deposited on Pt(111)/Ti/SiO2/Si(111) substrates by chemical solution deposition (CSD) and crystallized in nitrogen,air and oxygen atmospheres,respectively. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to identify the crystal structure,the surface and cross-section morphology of the deposited ferroelectric films. The results show that the crystallization atmosphere has significant effect on determining the crystallization and ferroelectric properties of the BDT films. The film crystallized in nitrogen at a relatively low temperature of 650 ℃,exhibits excellent crystallinity and ferroelectricity with a remanent polarization of 2Pr = 24.9 μC/cm2 and a coercive field of 144.5 kV/cm. While the films annealed in air and oxygen at 650 ℃ do not show good crystallinity and ferroelectricity until they are annealed at 700 ℃. The structure evolution and ferroelectric properties of BDT thin films annealed under different temperatures (600-750 ℃) were also investigated. The crystallinity of the BDT films is improved and the average grain size increases when the annealing temperature increases from 600 ℃ to 750 ℃ at an interval of 50 ℃. However,the polarization of the films is not monotonous function of the annealing temperature.

  16. 37 CFR 1.71 - Detailed description and specification of the invention.

    Science.gov (United States)

    2010-07-01

    ... specification of the invention. 1.71 Section 1.71 Patents, Trademarks, and Copyrights UNITED STATES PATENT AND... Provisions Specification § 1.71 Detailed description and specification of the invention. (a) The specification must include a written description of the invention or discovery and of the manner and process of...

  17. 22 CFR 171.5 - Requests for information-types and how made.

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Requests for information-types and how made. 171.5 Section 171.5 Foreign Relations DEPARTMENT OF STATE ACCESS TO INFORMATION AVAILABILITY OF INFORMATION AND RECORDS TO THE PUBLIC General Policy and Procedures § 171.5 Requests for information—types...

  18. 46 CFR 171.145 - Drainage of a vessel with a cockpit.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Drainage of a vessel with a cockpit. 171.145 Section 171... vessel with a cockpit. (a) Except as follows, the cockpit must be watertight: (1) A cockpit may have companionways if they comply with § 171.124(d). (2) A cockpit may have ventilation openings along its...

  19. 27 CFR 40.171 - Execution and filing of Form SS-4.

    Science.gov (United States)

    2010-04-01

    ... applications may be filed with the district director of any such district as provided for in 26 CFR 301.6091-1... Form SS-4. 40.171 Section 40.171 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND... Payment of Taxes on Tobacco Products § 40.171 Execution and filing of Form SS-4. The application on...

  20. 40 CFR 171.3 - Categorization of commercial applicators of pesticides.

    Science.gov (United States)

    2010-07-01

    ... applicators of pesticides. 171.3 Section 171.3 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS CERTIFICATION OF PESTICIDE APPLICATORS § 171.3 Categorization of commercial applicators of pesticides. (a) Procedure. Categories of applicators (other than private) using or supervising...

  1. 25 CFR 171.410 - Can I install a fence on a BIA irrigation project?

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Can I install a fence on a BIA irrigation project? 171... IRRIGATION OPERATION AND MAINTENANCE Irrigation Facilities § 171.410 Can I install a fence on a BIA irrigation project? Yes. Fences are considered structures and may be installed in compliance with § 171.405....

  2. 25 CFR 171.210 - Where will BIA provide my irrigation service?

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Where will BIA provide my irrigation service? 171.210 Section 171.210 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER IRRIGATION OPERATION AND MAINTENANCE Irrigation Service § 171.210 Where will BIA provide my irrigation service? (a)...

  3. Sensitive search for the temporal variation of the fine structure constant using radio-frequency E1 transitions in atomic dysprosium

    CERN Document Server

    Nguyen, A T; Lamoreaux, S K; Torgerson, J R

    2003-01-01

    It has been proposed that the radio-frequency electric-dipole (E1) transition between two nearly degenerate opposite-parity states in atomic dysprosium should be highly sensitive to possible temporal variation of the fine structure constant ($\\alpha$) [V. A. Dzuba, V. V. Flambaum, and J. K. Webb, Phys. Rev. A {\\bf 59}, 230 (1999)]. We discuss here an experimental realization of the proposed search, which involves monitoring the E1 transition frequency over a period of time using direct frequency counting techniques. We estimate that a statistical sensitivity of $|\\adota| \\sim 10^{-18}$/yr may be achieved and discuss possible systematic effects in such a measurement.

  4. Dysprosium doping induced shape and magnetic anisotropy of Fe3-xDyxO4 (x=0.01-0.1) nanoparticles

    Science.gov (United States)

    Jain, Richa; Luthra, Vandna; Gokhale, Shubha

    2016-09-01

    The effect of dysprosium doping on evolution of structural and magnetic properties of magnetite (Fe3O4) nanoparticles is reported. A standard route of co-precipitation was used for the synthesis of undoped and doped magnetite nanoparticles Fe3-xDyxO4 (x=0.0-0.1). Transmission electron microscopy (TEM) shows formation of round shaped particles with diameter in the range of 8-14 nm for undoped sample. On doping beyond x=0.01, the formation of rod like structures is initiated along with the round shaped particles. The number of rods is found to increase with increasing doping concentration. Magnetic characterization using Vibrating Sample Magnetometer (VSM) revealed doping dependent magnetic properties which can be correlated with the crystallite size as determined from X-ray diffraction (XRD). Enhancement in the saturation magnetization in the initial stages of doping can be explained on the basis of incorporation of Dy3+ ions in the inverse spinel structure at the octahedral site in place of Fe3+ ions. Subsequent decrease in saturation magnetization observed beyond x=0.03 could be attributed to precipitation of excess Dy in form of dysprosium ferrite phase.

  5. Bacillus thuringiensis peptidoglycan hydrolase SleB171 involved in daughter cell separation during cell division.

    Science.gov (United States)

    Li, Hua; Hu, Penggao; Zhao, Xiuyun; Yu, Ziniu; Li, Lin

    2016-04-01

    Whole-genome analyses have revealed a putative cell wall hydrolase gene (sleB171) that constitutes an operon with two other genes (ypeBandyhcN) of unknown function inBacillus thuringiensisBMB171. The putative SleB171 protein consists of 259 amino acids and has a molecular weight of 28.3 kDa. Gene disruption ofsleB171in the BMB171 genome causes the formation of long cell chains during the vegetative growth phase and delays spore formation and spore release, although it has no significant effect on cell growth and the ultimate release of the spores. The inseparable vegetative cells were nearly restored through the complementation ofsleB171expression. Real-time quantitative polymerase chain reaction analysis revealed thatsleB171is mainly active in the vegetative growth phase, with a maximum activity at the early stationary growth phase. Western blot analysis also confirmed thatsleB171is preferentially expressed during the vegetative growth phase. These results demonstrated that SleB171 plays an essential role in the daughter cell separation during cell division.

  6. Thermoelasticity of hcp-Fe up to 171 GPa

    Science.gov (United States)

    Murphy, C. A.; Jackson, J. M.; Sturhahn, W.; Chen, B.

    2012-12-01

    Iron is thought to be the main constituent in Earth's core, along with ~5 to 10 wt% nickel and some light elements. The poorly constrained light element component in the core is due, in part, to uncertainties in the high-pressure thermoelastic and thermodynamic properties of both pure iron and iron-alloys. Therefore, it is important to firmly establish the properties of the end-member composition of pure iron at core conditions, which will serve as an important baseline against which to compare the properties of iron-alloys and those inferred for Earth's core. To further our understanding of hexagonal close-packed iron (hcp-Fe) at core pressures, we directly probed its total phonon density of states (DOS) up to 171 GPa and at 300 K, using nuclear resonant inelastic x-ray scattering (NRIXS) and in situ x-ray diffraction (XRD) experiments performed at Sector 3-ID-B of the Advanced Photon Source at Argonne National Laboratory (1, 2). Our use of a hydrostatic pressure medium for select measurements and determination of sample volume with in situ XRD at each of our eleven compression points distinguish our study from previous similar works. In addition, long data collection times resulted in a high statistical quality dataset that, in turn, allowed for our unique analyses of hcp-Fe's thermoelastic and vibrational thermodynamic properties. For example, we determined the Debye sound velocity of hcp-Fe at each compression point from our measured densities and a parabolic fit of the low-energy region of the phonon DOS. In addition, we obtained the vibrational entropy from the integrated total phonon DOS, and used its volume dependence to determine the thermal expansion coefficient of hcp-Fe at 300 K and up to 171 GPa (3). This parameter provides a means for converting between reported values for the isothermal bulk modulus (4) and the adiabatic bulk modulus, the latter of which we used with our measured Debye sound velocities to determine a new tight constraint on the

  7. 22 CFR 171.15 - Fees to be charged-categories of requesters.

    Science.gov (United States)

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Fees to be charged-categories of requesters. 171.15 Section 171.15 Foreign Relations DEPARTMENT OF STATE ACCESS TO INFORMATION AVAILABILITY OF..., educational and non-commercial scientific institutions, representatives of the news media, and all...

  8. 30 CFR 206.171 - What definitions apply to this subpart?

    Science.gov (United States)

    2010-07-01

    ... Section 206.171 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR MINERALS REVENUE MANAGEMENT PRODUCT VALUATION Indian Gas § 206.171 What definitions apply to this subpart? The following... the Department of the Interior. BLM means the Bureau of Land Management of the Department of...

  9. 46 CFR 171.017 - One and two compartment standards of flooding.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false One and two compartment standards of flooding. 171.017... STABILITY SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS General § 171.017 One and two compartment... standard of flooding if the margin line is not submerged when the total buoyancy between each set of two...

  10. Genome Sequence of Delftia acidovorans HK171, a Nematicidal Bacterium Isolated from Tomato Roots

    Science.gov (United States)

    Han, Jae Woo; Oh, Mira; Choi, Gyung Ja

    2017-01-01

    ABSTRACT Delftia acidovorans strain HK171, isolated from tomato roots, exhibited nematicidal activity against Meloidogyne incognita. Here, we present the genome sequence of D. acidovorans strain HK171, which consists of one circular chromosome of 6,430,384 bp, with 66.9% G+C content. PMID:28254991

  11. 10 CFR 171.25 - Collection, interest, penalties, and administrative costs.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 2 2010-01-01 2010-01-01 false Collection, interest, penalties, and administrative costs. 171.25 Section 171.25 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) ANNUAL FEES FOR REACTOR... other relevant regulations of the United States Government, as appropriate. In the event a...

  12. 22 CFR 171.24 - Access by historical researchers and certain former government personnel.

    Science.gov (United States)

    2010-04-01

    ... former government personnel. 171.24 Section 171.24 Foreign Relations DEPARTMENT OF STATE ACCESS TO... Access by historical researchers and certain former government personnel. (a) The restriction in E.O. 12958 and predecessor orders on limiting access to classified information to individuals who have a...

  13. 49 CFR 171.22 - Authorization and conditions for the use of international standards and regulations.

    Science.gov (United States)

    2010-10-01

    ... MATERIALS REGULATIONS GENERAL INFORMATION, REGULATIONS, AND DEFINITIONS Authorization and Requirements for... subchapter and the regulations of a foreign entity, is permitted under this subchapter. (4) Each person who... reporting requirements in §§ 171.15 and 171.16 of this part for incidents occurring within the...

  14. 49 CFR 171.24 - Additional requirements for the use of the ICAO Technical Instructions.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Additional requirements for the use of the ICAO... International Transport Standards and Regulations § 171.24 Additional requirements for the use of the ICAO... by aircraft in accordance with the ICAO Technical Instructions (IBR, see § 171.7), as authorized...

  15. 25 CFR 171.230 - What are my responsibilities for wastewater?

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false What are my responsibilities for wastewater? 171.230... OPERATION AND MAINTENANCE Irrigation Service § 171.230 What are my responsibilities for wastewater? (a) You are responsible for your wastewater. (b) Wastewater may be returned to our facilities, but only...

  16. Single-molecule magnet behavior in an octanuclear dysprosium(iii) aggregate inherited from helical triangular Dy3 SMM-building blocks.

    Science.gov (United States)

    Zhang, Li; Zhang, Peng; Zhao, Lang; Wu, Jianfeng; Guo, Mei; Tang, Jinkui

    2016-06-28

    An unprecedented octanuclear dysprosium(iii) cluster with the formula [Dy8L6(μ3-OH)4(μ2-CH3O)2(CH3OH)6(H2O)2]·6H2O·10CH3OH·2CH3CN () based on a nonlinearly tritopic aroylhydrazone ligand H3L has been isolated, realizing the successful linking of pairwise interesting triangular Dy3 SMMs. It is noteworthy that two enantiomers (Λ and Δ configurations) individually behaving as a coordination-induced chirality presented in the Dy3 helicate are connected in the meso Dy8 cluster. Remarkably, alternating-current magnetic susceptibility measurements revealed that the Dy8 cluster shows typical SMM behavior inherited from its Dy3 helical precursor. It is one of the rare polynuclear Lnn SMMs (n > 7) under zero dc field.

  17. Another challenge to paramagnetic relaxation theory: a study of paramagnetic proton NMR relaxation in closely related series of pyridine-derivatised dysprosium complexes.

    Science.gov (United States)

    Rogers, Nicola J; Finney, Katie-Louise N A; Senanayake, P Kanthi; Parker, David

    2016-02-14

    Measurements of the relaxation rate behaviour of two series of dysprosium complexes have been performed in solution, over the field range 1.0 to 16.5 Tesla. The field dependence has been modelled using Bloch-Redfield-Wangsness theory, allowing estimates of the electronic relaxation time, T1e, and the size of the magnetic susceptibility, μeff, to be made. Changes in relaxation rate of the order of 50% at higher fields were measured, following variation of the para-substituent in the single pyridine donor. The magnetic susceptibilities deviated unexpectedly from the free-ion values for certain derivatives in each series examined, in a manner that was independent of the electron-releasing/withdrawing ability of the pyridine substituent, suggesting that the polarisability of just one pyridine donor in octadenate ligands can play a significant role in defining the magnetic susceptibility anisotropy.

  18. Integral field spectroscopy of the radio galaxy 3C 171

    CERN Document Server

    Márquez, I; Durret, F; Petitjean, P

    2000-01-01

    We have performed integral field spectroscopy of the radio galaxy 3C 171 (redshift z=0.238) with the TIGER instrument at the Canada France Hawaii telescope in the Hbeta-[OIII]4959-5007 wavelength region. We present the reconstructed Hbeta and [OIII] images and compare them to the HST and radio maps. We discuss the variations of the [OIII]/Hbeta line ratio throughout the nebulosity. We also analyze the velocity field in detail, in particular the presence of several components. We find that the kinematics derived with emission lines in the central region (inside 1 arcsec) are compatible with a disk-like rotation of low amplitude (50 km/s). The continuum surface brightness profile follows an r^{1/4} law, suggesting that the underlying galaxy is an elliptical with an effective radius of 15 kpc. We have fit two components in the region centered 2.7 arcsec to the West and of extension 3 arcsec^2. We find that the blueshifted component is an extension of the central part, whereas the second one is redshifted by 600 ...

  19. 26 CFR 17.1 - Industrial development bonds used to provide solid waste disposal facilities; temporary rules.

    Science.gov (United States)

    2010-04-01

    ... 26 Internal Revenue 14 2010-04-01 2010-04-01 false Industrial development bonds used to provide solid waste disposal facilities; temporary rules. 17.1 Section 17.1 Internal Revenue INTERNAL REVENUE... UNDER 26 U.S.C. 103(c) § 17.1 Industrial development bonds used to provide solid waste...

  20. 46 CFR 171.050 - Intact stability requirements for a mechanically propelled or a nonself-propelled vessel.

    Science.gov (United States)

    2010-10-01

    ... propelled or a nonself-propelled vessel. 171.050 Section 171.050 Shipping COAST GUARD, DEPARTMENT OF... PASSENGERS Large Vessels § 171.050 Intact stability requirements for a mechanically propelled or a nonself-propelled vessel. Each vessel must be shown by design calculations to have a metacentric height (GM) in...

  1. 25 CFR 171.215 - What if the elevation of my farm unit is too high to receive irrigation water?

    Science.gov (United States)

    2010-04-01

    ... receive irrigation water? 171.215 Section 171.215 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER IRRIGATION OPERATION AND MAINTENANCE Irrigation Service § 171.215 What if the elevation of my farm unit is too high to receive irrigation water? (a) We will not change our service ditch...

  2. 27 CFR 1.71 - Distilled spirits in containers of a capacity of one gallon or less.

    Science.gov (United States)

    2010-04-01

    ... containers of a capacity of one gallon or less. 1.71 Section 1.71 Alcohol, Tobacco Products and Firearms... Nonindustrial § 1.71 Distilled spirits in containers of a capacity of one gallon or less. Distilled spirits in containers of a capacity of one wine gallon or less, except anhydrous alcohol and alcohol which may...

  3. 48 CFR 3009.171-3 - Determination of eligibility for award of FPS guard service contracts.

    Science.gov (United States)

    2010-10-01

    ...) ACQUISITION PLANNING CONTRACTOR QUALIFICATIONS Responsible Prospective Contractors 3009.171-3 Determination of... contracting officer in writing upon any felony conviction of personnel who own, control or operate a business...

  4. Demographic Data - P.L. 94-171 Reference Maps (2010 Census)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — Public Law (P.L.) 94-171, enacted in 1975, directs the U.S. Census Bureau to make special preparations to provide redistricting data needed by the 50 states. It...

  5. 18 CFR 367.1710 - Account 171, Interest and dividends receivable.

    Science.gov (United States)

    2010-04-01

    ... NATURAL GAS ACT Balance Sheet Chart of Accounts Current and Accrued Assets § 367.1710 Account 171... ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY REGULATIONS UNDER THE PUBLIC UTILITY HOLDING...

  6. Tuning the composition and magnetostructure of dysprosium iron garnets by Co-substitution: An XRD, FT-IR, XPS and VSM study

    Energy Technology Data Exchange (ETDEWEB)

    Tholkappiyan, R.; Vishista, K., E-mail: raovishista@gmail.com

    2015-10-01

    Graphical abstract: - Highlights: • Garnet type Dy{sub 3}Fe{sub 5−x}Co{sub x}O{sub 12} (x = 0–0.06) nanoparticles were synthesized by glycine assisted combustion method. • To investigate and confirm the phases in the synthesized ferrite nanoparticles by FT-IR and XRD analysis. • To investigate the compositional and oxidation state of the samples by X-ray photoelectron spectroscopy. • The detailed core level spectra of Dy 4d, Fe 2p, Co 2p and O 1s were analyzed using XPS. • The magnetic property was studied by VSM technique. - Abstract: We report the Co-substituting on the synthesis and properties of garnet type dysprosium ferrite nanoparticles by basic composition Dy{sub 3}Fe{sub 5−x}Co{sub x}O{sub 12} (x = 0–0.06) synthesized through glycine assisted combustion method. A possible formation mechanism of synthesized Dy{sub 3}Fe{sub 5−x}Co{sub x}O{sub 12} samples by controlling the synthesis process has been proposed. XRD, FT-IR, XPS and VSM studies were used to investigate the compositional and magnetostructural properties of the prepared nanoparticles. XRD results confirm that all the samples are single-phase cubic garnet structure with mean crystallite size of 97–105 nm obtained from Scherrer method and 95–102 nm from W–H method. FT-IR analysis shows the presence of three expected bands in the frequency limit of 450–600 cm{sup −1} attributed to metal–O stretching vibration in tetrahedral site of garnet structure. A typical survey spectrum from XPS results confirmed the presence of Dy, Fe, Co and O elements in the samples. This study also to characterize the different oxidation states of the samples by fitting the parameters of high resolution Dy 4d, Fe 2p, Co 2p and O 1s XPS spectra. The XPS data of Dy 4d spectrum show that Dy{sup 3+} ion occupy in dodecahedral (D) site. The XPS analysis of Fe 2p and Co 2p data suggests that (Fe{sup 3+} and Fe{sup 2+}), (Co{sup 3+} and Co{sup 2+}) are distributed in tetrahedral and octahedral sites

  7. A dysprosium-based metal-organic framework: Synthesis, characterization, crystal structure and interaction with calf thymus-DNA and bovine serum albumin

    Indian Academy of Sciences (India)

    Biplab Mondal; Buddhadeb Sen; Ennio Zangrando; Pabitra Chattopadhyay

    2014-07-01

    A dysprosium-based metallo-organic framework (MOF) containing calcium ions formulated as {Dy(pyda)3Ca1.5(H2O)6} · 5.5H2O (1) (H2pyda = pyridine-2,6-dicarboxylic acid) was solvothermally synthesized in ethanolic medium and characterized by physico-chemical and spectroscopic tools. A detailed structural analysis of the solid state structure of 1 by single crystal X-ray diffraction study showed a tricapped trigonal prism geometry for lanthanide in the [Dy(pyda)3]3− fragment. The mode of interaction of 1 with calf thymus- DNA and with protein bovine serum albumin (BSA) was investigated by using absorption and emission spectroscopic tools. The apparent association constant of complex 1 with CT-DNA was deduced from an absorption spectral study (b = 4.08 × 104 M-1). Spectral and viscosity measurements indicated a groove-binding mode of 1 with CT-DNA, and from spectroscopic study the formation of a metal complex-BSA adduct was assumed to be the result of the interaction of 1 with BSA.

  8. Dual-mode T1 and T2 magnetic resonance imaging contrast agent based on ultrasmall mixed gadolinium-dysprosium oxide nanoparticles: synthesis, characterization, and in vivo application

    Science.gov (United States)

    Tegafaw, Tirusew; Xu, Wenlong; Wasi Ahmad, Md; Baeck, Jong Su; Chang, Yongmin; Bae, Ji Eun; Chae, Kwon Seok; Kim, Tae Jeong; Lee, Gang Ho

    2015-09-01

    A new type of dual-mode T1 and T2 magnetic resonance imaging (MRI) contrast agent based on mixed lanthanide oxide nanoparticles was synthesized. Gd3+ (8S7/2) plays an important role in T1 MRI contrast agents because of its large electron spin magnetic moment resulting from its seven unpaired 4f-electrons, and Dy3+ (6H15/2) has the potential to be used in T2 MRI contrast agents because of its very large total electron magnetic moment: among lanthanide oxide nanoparticles, Dy2O3 nanoparticles have the largest magnetic moments at room temperature. Using these properties of Gd3+ and Dy3+ and their oxide nanoparticles, ultrasmall mixed gadolinium-dysprosium oxide (GDO) nanoparticles were synthesized and their potential to act as a dual-mode T1 and T2 MRI contrast agent was investigated in vitro and in vivo. The D-glucuronic acid coated GDO nanoparticles (davg = 1.0 nm) showed large r1 and r2 values (r2/r1 ≈ 6.6) and as a result clear dose-dependent contrast enhancements in R1 and R2 map images. Finally, the dual-mode imaging capability of the nanoparticles was confirmed by obtaining in vivo T1 and T2 MR images.

  9. Experimental and molecular dynamics studies of dysprosium(III) salt solutions for a better representation of the microscopic features used within the binding mean spherical approximation theory.

    Science.gov (United States)

    Ruas, Alexandre; Guilbaud, Philippe; Den Auwer, Christophe; Moulin, Christophe; Simonin, Jean-Pierre; Turq, Pierre; Moisy, Philippe

    2006-10-19

    This work is aimed at a predictive description of the thermodynamic properties of actinide(III) salt solutions at high concentration and 25 degrees C. A new solution of the binding mean spherical approximation (BIMSA) theory, based on the Wertheim formalism, for taking into account 1:1 and also 1:2 complex formation, is used to reproduce, from a simple procedure, experimental osmotic coefficient variation with concentration for three binary salt solutions of the same lanthanide(III) cation: dysprosium(III) perchlorate, nitrate, and chloride. The relevance of the fitted parameters is discussed, and their values are compared with available literature values. UV-vis/near-IR, time-resolved laser-induced fluorescence spectroscopy experiments, and molecular dynamics (MD) calculations were conducted for dilute to concentrated solutions (ca. 3 mol.kg-1) for a study of the microscopic behavior of DyCl3 binary solutions. Coupling MD calculations and extended X-ray absorption fine structure led to the determination of reliable distances. The MD results were used for a discussion of the parameters used in the BIMSA.

  10. Experimental and molecular dynamics studies of dysprosium(III) salt solutions for a better representation of the microscopic features used within the binding mean spherical approximation theory

    Energy Technology Data Exchange (ETDEWEB)

    Ruas, Alexandre; Guilbaud, Philippe; Den Auwer, Christophe; Moulin, Christophe; Simonin, Jean-Pierre; Turq, Pierre; Moisy, Philippe [DEN/DRCP/SCPS, CEA-Valrho Marcoule, BP 17171, 30207 Bagnols-sur-Ceze Cedex, DEN/DPC/SECR/LSRM, CEA-Saclay, Bat 391, BP 91191 Gif sur Yvette, Cedex (France); Laboratoire LI2C (UMR 7612), Universite Pierre et Marie Curie-Paris 6, Boite No. 51, 4 Place Jussieu, 75252 Paris Cedex 05 (France)

    2006-07-01

    This work is aimed at a predictive description of the thermodynamic properties of actinide (III) salt solutions at high concentration and 25 deg. C. A new solution of the binding mean spherical approximation (BIMSA) theory, based on the Wertheim formalism, for taking into account 1: 1 and also 1: 2 complex formation, is used to reproduce, from a simple procedure, experimental osmotic coefficient variation with concentration for three binary salt solutions of the same lanthanide (III) cation: dysprosium (III) perchlorate, nitrate, and chloride. The relevance of the fitted parameters is discussed, and their values are compared with available literature values. UV-vis/near-IR, time-resolved laser-induced fluorescence spectroscopy experiments, and molecular dynamics (MD) calculations were conducted for dilute to concentrated solutions (ca. 3 mol, kg{sup -1}) for a study of the microscopic behavior of DyCl{sub 3} binary solutions. Coupling MD calculations and extended X-ray absorption fine structure led to the determination of reliable distances. The MD results were used for a discussion of the parameters used in the BIMSA. (authors)

  11. Elucidation of Dual Magnetic Relaxation Processes in Dinuclear Dysprosium(III) Phthalocyaninato Triple-Decker Single-Molecule Magnets Depending on the Octacoordination Geometry.

    Science.gov (United States)

    Katoh, Keiichi; Aizawa, Yu; Morita, Takaumi; Breedlove, Brian K; Yamashita, Masahiro

    2017-08-07

    When applying single-molecule magnets (SMMs) to spintronic devices, control of the quantum tunneling of the magnetization (QTM) as well as a spin-lattice interactions are important. Attempts have been made to use not only coordination geometry but also magnetic interactions between SMMs as an exchange bias. In this manuscript, dinuclear dysprosium(III) (Dy(III) ) SMMs with the same octacoordination geometry undergo dual magnetic relaxation processes at low temperature. In the dinuclear Dy(III) phthalocyaninato (Pc(2-) ) triple-decker type complex [(Pc)Dy(ooPc)Dy(Pc)] (1) (ooPc(2-) =2,3,9,10,16,17,23,24-octakis(octyloxy)phthalocyaninato) with a square-antiprismatic (SAP) geometry, the ground state is divided by the Zeeman effect, and level intersection occurs when a magnetic field is applied. Due to the ground state properties of 1, since the Zeeman diagram where the levels intersect in an Hdc of 2500 Oe, two kinds of QTM and direct processes occur. However, dinuclear Dy(III) -Pc systems with C4 geometry, which have a twist angle (ϕ) of less than 45° do not undergo dual magnetic relaxation processes. From magnetic field and temperature dependences, the dual magnetic relaxation processes were clarified. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

  12. Annealing behaviour and crystal structure of RF-sputtered Bi-substituted dysprosium iron-garnet films having excess co-sputtered Bi-oxide content

    Energy Technology Data Exchange (ETDEWEB)

    Vasiliev, M; Nur-E-Alam, M; Alameh, K [Electron Science Research Institute, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, 6027 (Australia); Premchander, P; Lee, Y T [Department of Information and Communications, Gwangju Institute of Science and Technology (GIST), Gwangju, 500-712 (Korea, Republic of); Kotov, V A [Institute of Radio Engineering and Electronics, Russian Academy of Sciences, 11 Mohovaya St, Moscow, 125009 (Russian Federation); Lee, Y P, E-mail: m.vasiliev@ecu.edu.au [Quantum Photonic Science Research Center, Department of Physics, Hanyang University, 133-791 (Korea, Republic of)

    2011-02-23

    We investigate the magneto-optic properties, crystal structure and annealing behaviour of nano-composite media with record-high magneto-optic quality exceeding the levels reported so far in sputtered iron-garnet films. Bi-substituted dysprosium-gallium iron-garnet films having excess bismuth oxide content are deposited using RF co-sputtering, and a range of garnet materials are crystallized using conventional oven-annealing processes. We report, for the first time ever, the results of optimization of thermal processing regimes for various high-performance magneto-optic iron-garnet compositions synthesized and describe the evolution of the optical and magneto-optical properties of garnet-Bi-oxide composite-material films occurring during the annealing processes. The crystallization temperature boundaries of the system (BiDy){sub 3}(FeGa){sub 5}O{sub 12} : Bi{sub 2}O{sub 3} are presented. We also report the results of x-ray diffraction and energy-dispersive x-ray spectroscopy studies of this recently developed class of high-performance magneto-optic composites. Our hypothesis of iron oxides being the cause of excess optical absorption in sputtered Bi-iron-garnet films is confirmed experimentally.

  13. Ovine progressive pneumonia provirus levels are unaffected by the prion 171R allele in an Idaho sheep flock.

    Science.gov (United States)

    Harrington, Robert D; Herrmann-Hoesing, Lynn M; White, Stephen N; O'Rourke, Katherine I; Knowles, Donald P

    2009-01-22

    Selective breeding of sheep for arginine (R) at prion gene (PRNP) codon 171 confers resistance to classical scrapie. However, other effects of 171R selection are uncertain. Ovine progressive pneumonia/Maedi-Visna virus (OPPV) may infect up to 66% of a flock thus any affect of 171R selection on OPPV susceptibility or disease progression could have major impact on the sheep industry. Hypotheses that the PRNP 171R allele is 1) associated with the presence of OPPV provirus and 2) associated with higher provirus levels were tested in an Idaho ewe flock. OPPV provirus was found in 226 of 358 ewes by quantitative PCR. The frequency of ewes with detectable provirus did not differ significantly among the 171QQ, 171QR, and 171RR genotypes (p > 0.05). Also, OPPV provirus levels in infected ewes were not significantly different among codon 171 genotypes (p > 0.05). These results show that, in the flock examined, the presence of OPPV provirus and provirus levels are not related to the PRNP 171R allele. Therefore, a genetic approach to scrapie control is not expected to increase or decrease the number of OPPV infected sheep or the progression of disease. This study provides further support to the adoption of PRNP 171R selection as a scrapie control measure.

  14. Ovine progressive pneumonia provirus levels are unaffected by the prion 171R allele in an Idaho sheep flock

    Directory of Open Access Journals (Sweden)

    Herrmann-Hoesing Lynn M

    2009-01-01

    Full Text Available Abstract Selective breeding of sheep for arginine (R at prion gene (PRNP codon 171 confers resistance to classical scrapie. However, other effects of 171R selection are uncertain. Ovine progressive pneumonia/Maedi-Visna virus (OPPV may infect up to 66% of a flock thus any affect of 171R selection on OPPV susceptibility or disease progression could have major impact on the sheep industry. Hypotheses that the PRNP 171R allele is 1 associated with the presence of OPPV provirus and 2 associated with higher provirus levels were tested in an Idaho ewe flock. OPPV provirus was found in 226 of 358 ewes by quantitative PCR. The frequency of ewes with detectable provirus did not differ significantly among the 171QQ, 171QR, and 171RR genotypes (p > 0.05. Also, OPPV provirus levels in infected ewes were not significantly different among codon 171 genotypes (p > 0.05. These results show that, in the flock examined, the presence of OPPV provirus and provirus levels are not related to the PRNP 171R allele. Therefore, a genetic approach to scrapie control is not expected to increase or decrease the number of OPPV infected sheep or the progression of disease. This study provides further support to the adoption of PRNP 171R selection as a scrapie control measure.

  15. Global use structures of the magnetic materials neodymium and dysprosium. A scenario-based analysis of the effect of the diffusion of electromobility on the demand for rare earths; Globale Verwendungsstrukturen der Magnetwerkstoffe Neodym und Dysprosium. Eine szenariobasierte Analyse der Auswirkung der Diffusion der Elektromobilitaet auf den Bedarf an Seltenen Erden

    Energy Technology Data Exchange (ETDEWEB)

    Gloeser-Chahoud, Simon; Kuehn, Andre; Tercero Espinoza, Luis

    2016-06-15

    Neodymium-iron-boron magnets (NdFeB) have experienced a significant demand as the most powerful permanent magnet in recent years, especially for the manufacture of compact electric servomotors with high efficiency and high power density, especially for mobile applications in hybrid traction motors and electric vehicles or for electric bikes. However, NdFeB magnets are also increasingly being used in general mechanical engineering (conveying and pumping systems, tools, air conditioning systems, lift motors, etc.), in the small electric motors of conventional passenger cars or in the generators of large wind power plants with permanent magnetic direct drive. Nevertheless, there is still high uncertainty in the use structures of NdFeB magnets and the contained rare earth elements neodymium and dysprosium. An effective instrument for increasing the market transparency and the understanding of complex anthropogenic material cycles is the dynamic material flow modeling. In the present work paper, this instrument is used for an in-depth analysis of the use structures of NdFeB magnets and the contained rare earths on a global scale. The dynamic modeling of product usage cycles reveals today's usage structures and quantifies future magnetic quantities in obsolete product flows. It could be shown that the magnets in today's scrap volume are mainly contained in obsolete electronics applications such as hard disks (HDD), CD and DVD drives, which makes the recycling hardly seem to be economical due to the small magnets and the high material spread, but in the foreseeable future with larger magnetic quantities from synchronous servomotors and generators can be expected, which significantly increases the recycling potential. In a further step, the effect of the diffusion of alternative drives in the automotive market on the dysprosium requirement is analyzed using a system dynamics model and possible adaptation mechanisms in the form of different substitution effects in

  16. The role of dysprosium on the structural and magnetic properties of (Nd1-xDyx)2Fe14B nanoparticles

    Science.gov (United States)

    Rahimi, Hamed; Ghasemi, Ali; Mozaffarinia, Reza; Tavoosi, Majid

    2017-02-01

    In current work, Nd2Fe14B nanoparticles was synthesized by sol-gel method. Dysprosium powders were added into Nd2Fe14B nanoparticles by mechanical alloying process in order to enhancement of coercivity. The phase analysis, structure, and magnetic properties of annealed (Nd1-xDyx)2Fe14B nanoparticles with different Dy-content (x=0.1, 0.2, 0.3, 0.4, 0.5, 0.6) were investigated by employing X-ray diffraction, X-ray photoelectron spectroscopy, energy dispersive spectroscopy, field emission scanning electron microscope, transmission electron microscope and vibrating sample magnetometer techniques. The results showed that with an increase in Dy amounts, the coercivity of particles increased from 2.9 kOe to 13.4 kOe and then decreased to 5.6 kOe. By adding an optimum amount of Dy (x=0.4), the coercivity was significantly increased from 2.9 kOe to 13.4 kOe. The average particle size of annealed (Nd1-xDyx)2Fe14B nanoparticles was below 10 nm. Magnetization reversal studies indicate that the coercivity of milled and annealed (Nd1-xDyx)2Fe14B nanoparticles is controlled by the nucleation of reversed magnetic domains. The experimental results in the angular dependence of coercivity for (Nd1-xDyx)2Fe14B permanent magnets showed that the normalized coercivity of the permanent magnets Hc(θ)/Hc(0) increases from 1 to about 1.2-1.5 with increasing θ from 0 to about π/3, for x=0.4-0.6.

  17. 42 CFR 84.171 - Non-powered air-purifying particulate respirators; required components.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 1 2010-10-01 2010-10-01 false Non-powered air-purifying particulate respirators... PROTECTIVE DEVICES Non-Powered Air-Purifying Particulate Respirators § 84.171 Non-powered air-purifying particulate respirators; required components. (a) Each non-powered air-purifying particulate...

  18. Primary versus secondary gamma intensities in 171Yb(n_th,gamma)

    CERN Document Server

    Schiller, A; Bernstein, L A; Garrett, P E; Guttormsen, M; Nelson, R O; Rekstad, J; Siem, S; Voinov, A

    2006-01-01

    The two published literature values [Greenwood et al., Nucl. Phys. A252, 260 (1975) and Gelletly et al., J. Phys. G 11, 1055 (1985)] for absolute primary gamma intensities following thermal neutron capture of 171Yb differ in average by a factor of three. We have resolved this conflict in favor of Greenwood et al. by a measurement of primary versus secondary intensities.

  19. Yeast Interacting Proteins Database: YOR171C, YOR034C [Yeast Interacting Proteins Database

    Lifescience Database Archive (English)

    Full Text Available YOR171C LCB4 Sphingoid long-chain base kinase, responsible for synthesis of long-chain base phosphates...1C Bait gene name LCB4 Bait description Sphingoid long-chain base kinase, responsible for synthesis of long-chain base phosphates

  20. 40 CFR 205.171-8 - Passing or failing under SEA.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 24 2010-07-01 2010-07-01 false Passing or failing under SEA. 205.171... Passing or failing under SEA. (a) A failing exhaust system is one which, when installed on any motorcycle... equal to the number in Column A, the sample passes. (c) Pass or failure of a SEA takes place when...

  1. 75 FR 61520 - National Council on the Arts 171st Meeting

    Science.gov (United States)

    2010-10-05

    ... ARTS AND THE HUMANITIES National Endowment for the Arts National Council on the Arts 171st Meeting... hereby given that a meeting of the National Council on the Arts will be held on October 29, 2010 in Room...Ability, National Endowment for the Arts, 1100 Pennsylvania Avenue, NW., Washington, DC 20506,...

  2. 14 CFR 171.321 - DME and marker beacon performance requirements.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false DME and marker beacon performance... (MLS) § 171.321 DME and marker beacon performance requirements. (a) The DME equipment must meet the..._regulations/ibr_locations.html. (b) MLS marker beacon equipment must meet the performance requirements...

  3. 49 CFR 171.25 - Additional requirements for the use of the IMDG Code.

    Science.gov (United States)

    2010-10-01

    ... respectively, of this subchapter, and the motor vehicle or rail car must be placarded in accordance with... United States by vessel, and by motor carrier and rail in accordance with the IMDG Code (IBR, see § 171.7... transportation by highway is transported by motor vehicle on a public highway or by rail under the provisions...

  4. 49 CFR 171.15 - Immediate notice of certain hazardous materials incidents.

    Science.gov (United States)

    2010-10-01

    ... information: (1) Name of reporter; (2) Name and address of person represented by reporter; (3) Phone number... dangerous evolution of heat (i.e., an amount of heat sufficient to be dangerous to packaging or personal... § 171.15: Under 40 CFR 302.6, EPA requires persons in charge of facilities (including transport vehicles...

  5. 25 CFR 171.535 - Why is BIA collecting this information from me?

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Why is BIA collecting this information from me? 171.535... collecting this information from me? (a) As part of doing business with you, we must collect enough information from you to properly bill and service your account. (b) We are required to collect your...

  6. 25 CFR 171.415 - Can I place an obstruction on a BIA irrigation project?

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Can I place an obstruction on a BIA irrigation project... IRRIGATION OPERATION AND MAINTENANCE Irrigation Facilities § 171.415 Can I place an obstruction on a BIA irrigation project? No. You may not place obstructions on BIA irrigation projects. (a) If you do so, we will...

  7. 10 CFR 52.171 - Finality of manufacturing licenses; information requests.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 2 2010-01-01 2010-01-01 false Finality of manufacturing licenses; information requests... APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.171 Finality of manufacturing licenses; information requests. (a)(1) Notwithstanding any provision in 10 CFR 50.109, during the term of...

  8. 46 CFR 160.171-17 - Approval testing for adult size immersion suit.

    Science.gov (United States)

    2010-10-01

    ... suit during the test, and the suits used in the impact test must also be used in the thermal protection... conjunction with the thermal protection test described in § 160.171-17(d), in which case five of the six test....) long walking course must be laid out on a smooth linoleum floor. The finish on the floor must...

  9. 25 CFR 171.405 - Can I build my own structure or take over responsibility of a BIA structure?

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Can I build my own structure or take over responsibility of a BIA structure? 171.405 Section 171.405 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE... own structure or take over responsibility of a BIA structure? You may build a structure on our...

  10. 25 CFR 171.500 - How does BIA determine the annual operation and maintenance assessment rate for the irrigation...

    Science.gov (United States)

    2010-04-01

    ... maintenance assessment rate for the irrigation facility servicing my farm unit? 171.500 Section 171.500 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER IRRIGATION OPERATION AND... annual operation and maintenance assessment rate for the irrigation facility servicing my farm unit?...

  11. 47 CFR 36.171 - Property held for future telecommunications use-Account 2002; Telecommunications plant under...

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false Property held for future telecommunications use-Account 2002; Telecommunications plant under construction-Account 2003; and Telecommunications plant adjustment-Account 2005. 36.171 Section 36.171 Telecommunication FEDERAL COMMUNICATIONS COMMISSION...

  12. 34 CFR 403.171 - Who is eligible to apply to a State board for an award?

    Science.gov (United States)

    2010-07-01

    ... vocational education school, a State agency, a local educational agency, a secondary school funded by the... 34 Education 3 2010-07-01 2010-07-01 false Who is eligible to apply to a State board for an award? 403.171 Section 403.171 Education Regulations of the Offices of the Department of Education...

  13. Clinical observation on treating 171 cases of hematuria in the integrative medicine%中西医结合治疗血尿171例观察

    Institute of Scientific and Technical Information of China (English)

    蔡甄波

    2015-01-01

    Objective:To explore the clinical effect of Integrative Medicine on hematuria. Methods:171 patients with hematuria were analyzed. Results:all patients were effectively treated, cured in 135 cases, improved in 30 cases, 6 cases, the effective rate was 96.5%. Invalid for 6 patients, including 3 cases of emergency surgery, deterioration of 2 deaths, 1 case to abandon treatment. Conclusion: The integrative medicine for hematuria can gain significant clinical effect.%目的:探讨中西医结合治疗血尿的临床效果。方法:回顾性分析我院2010年9月-2013年9月期间收治的171例血尿患者的临床病例资料。结果:所有患者经有效治疗后,痊愈135例,好转30例,无效6例,有效率为96.5%。无效的6例患者中包括3例急诊手术治疗,2例恶化死亡,1例放弃治疗。结论:中西医结合治疗血尿临床效果显著,该方法值得在临床推广应用。

  14. Dysprosium(III) complexes with a square-antiprism configuration featuring mononuclear single-molecule magnetic behaviours based on different β-diketonate ligands and auxiliary ligands.

    Science.gov (United States)

    Zhang, Sheng; Ke, Hongshan; Shi, Quan; Zhang, Jangwei; Yang, Qi; Wei, Qing; Xie, Gang; Wang, Wenyuan; Yang, Desuo; Chen, Sanping

    2016-03-28

    Three mononuclear dysprosium(III) complexes derived from three β-diketonate ligands, 4,4,4-trifluoro-1-(4-methylphenyl)-1,3-butanedione (tfmb), 4,4,4-trifluoro-1-(4-fluorophenyl)-1,3-butanedione (tffb) and 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione (tfnb) as well as auxiliary ligands, 5-nitro-1,10-phenanthroline (5-NO2-Phen), DMF and 2,2'-bipyridine (bpy) have been synthesized and structurally characterized, namely [Dy(5-NO2-Phen)(tfmb)3] (1), [Dy(DMF)2(tffb)3] (2) and [Dy(bpy)2(tfnb)3]·0.5(1,4-dioxane) (3). The metal ions in 1-3 adopt an approximately square-antiprismatic (SAP) coordination environment with D4d axial symmetry. The magnetic properties of 1-3 have been investigated, displaying weak out-of-phase AC signals under a zero-DC field. With an applied DC field of 1200 Oe, the quantum tunnelling of the magnetization was suppressed in 1-3 with the pre-exponential factor τ0 = 5.3 × 10(-7) s and the effective barrier ΔE/kB = 83 K for 1 as well as the pre-exponential factor τ0 = 3.09 × 10(-7) s and the effective barrier ΔE/kB = 39 K for 3. Interestingly, for the frequency dependence of the out-of-phase (χ'') of the AC susceptibility of 2, two slow relaxation of the magnetization processes occurred under the applied magnetic field of 1200 Oe, corresponding to the fast relaxation (FR) phase and slow relaxation (SR) phase, respectively. Arrhenius analysis gave the effective energy barrier (ΔE/kB) of 55 K and the pre-exponential factor (τ0) of 8.23 × 10(-12) for the SR. It is thus very likely that the FR process in complex 2 results from QTM enhanced by dipolar interactions between the Dy ions or the presence of the applied field. The structure-property relationship of some Dy(III) based mononuclear SMMs with the SAP configuration was further discussed.

  15. Magnetic Phase Transition of Nanocrystalline Bulk Metal Gadolinium and Dysprosium%纳米块体金属钆和镝的磁性相变分析

    Institute of Scientific and Technical Information of China (English)

    刘凤艳; 侯碧辉; 岳明; 王克军

    2011-01-01

    The magnetic properties of bulk nanocrystalline metal gadolinium (Gd) and dysprosium (Dy)samples were studied.The magnetization and Curie temperature TC of nanocrystalline Gd and Dy decreased usually as compared with the polycrystal.However,when the mean grain size was 10 nm, the Curie temperature Tc of nanocrystalline Dy increased to 100 K instead and there was an antiferromagnetic phase in nanocrystalline Gd.According to the calculation based on Ruderman-Kittel-Kasuya-Yosida exchange interaction, the exchange integral of the grain boundary atoms and crystalline surface atoms had its sign changed from plus to minus or vice versa, and there were three orderly phases in the steady state with the lowest energy, ferromagnetic phase, antiferromagnetic phase and fan phase.For the nanocrystals with mean grain size of 10 nm, the proportion of grain boundary to crystalline surface atoms was high, and as the result of superposition of the three phases, and there appeared a peak near the phase transition temperature for the nanocrystalline Gd.While for the Dy, the magnetization decreased gently with temperature, and showing a higher Curie temperature than in the case of the polycrystal.%对纳米晶钆(Gd)和镝(Dy)块体材料的磁性进行了研究.与多晶比较,通常纳米晶的磁化强度减小,居里温度TC降低,但平均粒径为10 nm的纳米晶Dy的居里温度TC反而升高到100 K,平均粒径为10 nm的纳米晶Gd中还存在明显的反铁磁相.通过RKKY交换作用的计算知道,晶面晶界处原子的交换积分会发生正负号的变化,能量最低的稳定状态对应三种有序相:铁磁相、反铁磁相和扇相,晶粒中在一定条件下出现三相共存.对于平均粒径为10 nm的纳米晶,晶面晶界处原子所占比例很大,三相叠加的结果,对于Gd,即是在相变点附近出现磁化强度尖峰;对于Dy,则是磁化强度随温度升高下降缓慢,表现为居里温度TC比多晶升高.

  16. Identification of a New Member of the Ep-CAM (17-1A)Tumor-Associated Antigen Family

    Institute of Scientific and Technical Information of China (English)

    秦莉; 陈应华

    2002-01-01

    The tumor-associated antigen Ep-CAM (17-1A antigen), defined by the murine monoclonal antibody (mAb) 17-1A, has been identified as a 42-kD glycoprotein. The mAb 17-1A has been used for immunotherapy of colorectal cancer. We obtained mAb 19F4 using a synthetic peptide containing antigen determinants of 17-1A antigen. The mAb 19F4 can bind the corresponding dominants of the 17-1A antigen in ELISA. Western-blot analysis demonstrated that mAb 19F4 recognized a 50-kD protein from cell lysates of MCF-7 (breast cancer cell line). Both mAb 19F4 and 17-1A detected a 42-kD protein in the cell lysates of HT-29 (colorectal cancer cell line). The results suggest that new members of the tumor-associated antigen family 17-1A may exist.

  17. Blocking Effect and Moments of Inertia of K = 1/2 Rotational Band in 171Yb

    Institute of Scientific and Technical Information of China (English)

    YU Shao-Ying; LIU Yan-Xin; LIU Shu-Xin; HE Xiao-Tao

    2004-01-01

    The K = 1/2 rotational band in 171yb is investigated using the particle number conserving (PNC) method for treating the cranked shell model with monopole and quadrupole pairing interactions. The experimental moments of inertia of 171 Yb [521]1/2 (signature α = +1/2) are reproduced well by the PNC calculation, in which no free parameter is involved. The difference in the contribution to the moment of inertia between protons and neutrons is mainly due to the blocking effect of neutron normal orbitals. The ω variation of the occupation probability of each cranked orbital and the contribution to the moment of inertia from each major shell and from each cranked orbital are investigated.

  18. Blocking Effect and Moments of Inertia of K = 1/2 Rotational Band in 171Yb

    Institute of Scientific and Technical Information of China (English)

    YUShao-Ying; LIUYan-Xin; LIUShu-Xin; HEXiao-Tao

    2004-01-01

    The K = 1/2 rotational band in 171Yb is investigated using the particle number conserving (PNC) method for treating the cranked shell model with monopole and quadrupole pairing interactions. The experimental moments of inertia of 171Yb [52111/2 (signature α = ±1/2) are reproduced well by the P N C calculation, in which no free parameter is involved. The difference in the contribution to the moment of inertia between protons and neutrons is mainly due to the blocking effect of neutron normal orbitals. The ω variation of the occupation probability of each cranked orbital and the contribution to the moment of inertia from each major shell and from each cranked orbital are investigated.

  19. Purification and partial characterization of bacteriocin produced by Lactococcus lactis ssp. lactis LL171.

    Science.gov (United States)

    Kumari, Archana; Akkoç, Nefise; Akçelik, Mustafa

    2012-04-01

    Lactic acid bacteria (LAB) are possessing ability to synthesize antimicrobial compounds (like bacteriocin) during their growth. In this regard, novel bacteriocin compound secreting capability of LAB isolated from Tulum Cheese in Turkey was demonstrated. The synthesized bacteriocin was purified by ammonium sulphate precipitation, dialysis and gel filtration. The molecular weight (≈3.4 kDa) of obtained bacteriocin was confirmed by SDS-PAGE, which revealed single peptide band. Molecular identification of LAB strain isolated from Tulum Cheese was conducted using 16S rDNA gene sequencing as Lactococcus lactis ssp. lactis LL171. The amino acid sequences (KKIDTRTGKTMEKTEKKIELSLKNMKTAT) of the bacteriocin from Lactococcus lactis ssp. lactis LL171 was found unique and novel than reported bacteriocins. Further, the bacteriocin was possessed the thermostable property and active at wide range of pH values from 1 to 11. Thus, bacteriocin reported in this study has the potential applications property as food preservative agent.

  20. Extension of the energy range of the experimental activation cross-sections data of longer-lived products of proton induced nuclear reactions on dysprosium up to 65 MeV

    CERN Document Server

    Tárkányi, F; Takács, S; Hermanne, A; Ignatyuk, A V

    2016-01-01

    Activation cross-sections data of longer-lived products of proton induced nuclear reactions on dysprosium were extended up to 65 MeV by using stacked foil irradiation and gamma spectrometry experimental methods. Experimental cross-sections data for the formation of the radionuclides $^{159}$Dy, $^{157}$Dy, $^{155}$Dy, $^{161}$Tb, $^{160}$Tb, $^{156}$Tb, $^{155}$Tb, $^{154m2}$Tb, $^{154m1}$Tb, $^{154g}$Tb, $^{153}$Tb, $^{152}$Tb and $^{151}$Tb are reported in the 36-65 MeV energy range, and compared with an old dataset from 1964. The experimental data were also compared with the results of cross section calculations of the ALICE and EMPIRE nuclear model codes and of the TALYS nuclear reaction model code as listed in the latest on-line libraries TENDL 2013.

  1. Extension of the energy range of the experimental activation cross-sections data of longer-lived products of proton induced nuclear reactions on dysprosium up to 65MeV.

    Science.gov (United States)

    Tárkányi, F; Ditrói, F; Takács, S; Hermanne, A; Ignatyuk, A V

    2015-04-01

    Activation cross-sections data of longer-lived products of proton induced nuclear reactions on dysprosium were extended up to 65MeV by using stacked foil irradiation and gamma spectrometry experimental methods. Experimental cross-sections data for the formation of the radionuclides (159)Dy, (157)Dy, (155)Dy, (161)Tb, (160)Tb, (156)Tb, (155)Tb, (154m2)Tb, (154m1)Tb, (154g)Tb, (153)Tb, (152)Tb and (151)Tb are reported in the 36-65MeV energy range, and compared with an old dataset from 1964. The experimental data were also compared with the results of cross section calculations of the ALICE and EMPIRE nuclear model codes and of the TALYS nuclear reaction model code as listed in the latest on-line libraries TENDL 2013. Copyright © 2015. Published by Elsevier Ltd.

  2. Absolute frequency measurement of the 1S0 - 3P0 transition of 171Yb

    CERN Document Server

    Pizzocaro, Marco; Rauf, Benjamin; Bregolin, Filippo; Milani, Gianmaria; Clivati, Cecilia; Costanzo, Giovanni A; Levi, Filippo; Calonico, Davide

    2016-01-01

    We report the absolute frequency measurement of the unperturbed transition 1S0 - 3P0 at 578 nm in 171Yb realized in an optical lattice frequency standard. The absolute frequency is measured 518 295 836 590 863.55(28) Hz relative to a cryogenic caesium fountain with a fractional uncertainty of 5.4x10-16 . This value is in agreement with the ytterbium frequency recommended as a secondary representation of the second in the International System of Units.

  3. Dysprosium selective potentiometric membrane sensor

    Energy Technology Data Exchange (ETDEWEB)

    Zamani, Hassan Ali, E-mail: haszamani@yahoo.com [Department of Applied Chemistry, Mashhad Branch, Islamic Azad University, Mashhad (Iran, Islamic Republic of); Faridbod, Farnoush; Ganjali, Mohammad Reza [Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran (Iran, Islamic Republic of)

    2013-03-01

    A novel Dy(III) ion-selective PVC membrane sensor was made using a new synthesized organic compound, 3,4-diamino-N Prime -((pyridin-2-yl)methylene)benzohydrazide (L) as an excellent sensing element. The electrode showed a Nernstian slope of 19.8 {+-} 0.6 mV per decade in a wide concentration range of 1.0 Multiplication-Sign 10{sup -6}-1.0 Multiplication-Sign 10{sup -2} mol L{sup -1}, a detection limit of 5.5 Multiplication-Sign 10{sup -7} mol L{sup -1}, a short conditioning time, a fast response time (< 10 s), and high selectivity towards Dy(III) ion in contrast to other cations. The proposed sensor was successfully used as an indicator electrode in the potentiometric titration of Dy(III) ions with EDTA. The membrane sensor was also applied to the F{sup -} ion indirect determination of some mouth washing solutions and to the Dy{sup 3+} determination in binary mixtures. Highlights: Black-Right-Pointing-Pointer The novelty of this work is based on the high affinity of the ionophore toward the Dy{sup 3+} ions. Black-Right-Pointing-Pointer This technique is very simple, fast and inexpensive and it is not necessary to use sophisticated equipment. Black-Right-Pointing-Pointer The newly developed sensor is superior to the formerly reported Dy{sup 3+} sensors in terms of selectivity.

  4. The magnetocaloric effect in dysprosium

    Science.gov (United States)

    Benford, S. M.

    1979-01-01

    The magnetocaloric effect in polycrystalline Dy was measured in the 84-280-K range in measuring fields from 1 to 7 T. These adiabatic temperature changes reflect structural changes in Dy with applied field and temperature, and include the first magnetocaloric data for a helical antiferromagnet. Above the Neel point (179 K) a field increase always caused heating; below the Neel point fields less than about 2 T cause cooling for some values of initial temperature. The largest temperature increase with a 7 T field occurs at the Neel point and at fields below 2 T near the Curie point. For refrigeration purposes the optimal working region for a Dy cooling element is field dependent.

  5. Anomalous saturated absorption providing a stable laser lock for $^{171}$Yb laser cooling

    CERN Document Server

    McFerran, J J

    2016-01-01

    We identify an inverted Lamb dip in the saturated absorption spectroscopy of the $(6s^{2})$ $^{1}S_{0}$ $-$ $(6s6p)$ $^{3}P_{1}$ transition in $^{171}$Yb. The signal has only been observed with the two hyperfine lines of this spin $I=\\frac{1}{2}$ isotope. For both lines the application of a dc magnetic field transforms a two-level scheme into a four-level scheme, with degeneracy only marginally lifted in the ground state. The atoms are excited through $\\pi$ transitions, while the de-excitation process completes a simple optical pumping scheme. However, the full explanation of the enhanced absorption is yet to be determined. The anomalous absorption signal is used to generate a dispersive curve for 556 nm laser stabilisation and the stabilised light cools $^{171}$Yb atoms in a two-stage magneto-optical trap, achieving temperatures below 50 $\\mu$K. The Doppler-free spectroscopy scheme is further used to measure isotopic frequency shifts and hyperfine separations for the intercombination line in Yb.

  6. Neutron capture at the s-process branching points $^{171}$Tm and $^{204}$Tl

    CERN Multimedia

    Branching points in the s-process are very special isotopes for which there is a competition between the neutron capture and the subsequent b-decay chain producing the heavy elements beyond Fe. Typically, the knowledge on the associated capture cross sections is very poor due to the difficulty in obtaining enough material of these radioactive isotopes and to measure the cross section of a sample with an intrinsic activity; indeed only 2 out o the 21 ${s}$-process branching points have ever been measured by using the time-of-flight method. In this experiment we aim at measuring for the first time the capture cross sections of $^{171}$Tm and $^{204}$Tl, both of crucial importance for understanding the nucleosynthesis of heavy elements in AGB stars. The combination of both (n,$\\gamma$) measurements on $^{171}$Tm and $^{204}$Tl will allow one to accurately constrain neutron density and the strength of the 13C(α,n) source in low mass AGB stars. Additionally, the cross section of $^{204}$Tl is also of cosmo-chrono...

  7. Frequency comparison of ${}^{171}$Yb${}^+$ ion optical clocks at PTB and NPL via GPS PPP

    CERN Document Server

    Leute, J; Lipphardt, B; Tamm, Chr; Nisbet-Jones, P B R; King, S A; Godun, R M; Jones, J M; Margolis, H S; Whibberley, P B; Wallin, A; Merimaa, M; Gill, P; Peik, E

    2015-01-01

    We used Precise Point Positioning, a well-established GPS carrier-phase frequency transfer method to perform a direct remote comparison of two optical frequency standards based on single laser-cooled $^{171}$Yb$^+$ ions operated at NPL, UK and PTB, Germany. At both institutes an active hydrogen maser serves as a flywheel oscillator; it is connected to a GPS receiver as an external frequency reference and compared simultaneously to a realization of the unperturbed frequency of the ${{}^2S_{1/2}(F=0)-{}^2D_{3/2}(F=2)}$ electric quadrupole transition in ${}^{171}$Yb${}^+$ via an optical femtosecond frequency comb. To profit from long coherent GPS link measurements we extrapolate over the various data gaps in the optical clock to maser comparisons which introduces maser noise to the frequency comparison but improves the uncertainty from the GPS link. We determined the total statistical uncertainty consisting of the GPS link uncertainty and the extrapolation uncertainties for several extrapolation schemes. Using t...

  8. Frequency standard based on the octupole transition in {sup 171}Yb{sup +}

    Energy Technology Data Exchange (ETDEWEB)

    Huntemann, Nils; Okhapkin, Maxim; Lipphard, Burghard; Weyers, Stefan; Tamm, Christian; Peik, Ekkehard [Fachbereich Zeit und Frequenz, Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig (Germany)

    2011-07-01

    W present our results on the development of a new optical frequency standard based on the electric octupole (E3) transition {sup 2}S{sub 1/2}(F=0) {yields} {sup 2}F{sub 7/2}(F=3) of a single trapped laser-cooled {sup 171}Yb{sup +} ion at 467 nm. In comparison with a previously realized optical frequency standard in {sup 171}Yb{sup +} this E3 transition benefits from smaller systematic level shifts due to external fields and its negligible natural linewidth. Another important aspect of the new standard is its strong dependence on variations of the fine structure constant {alpha}. A recently built probe laser system and the use of a new efficient repump scheme allows to observe Fourier transform-limited linewidths below 7 Hz and a resonant excitation probability of more than 90 %. We lock the probe laser frequency to the resonance signal of the E3 transition and use a real-time extrapolation scheme to eliminate the huge light shift induced by the probe field. The unperturbed transition frequency was measured by a comparison to a caesium fountain clock using a frequency comb generator. The resulting uncertainty was mainly limited by the systematic uncertainty of the fountain clock.

  9. Sympathetic cooling of 171 Yb+ qubit ions on a scalable ion trap chip using Yb isotopes

    Science.gov (United States)

    Kwon, Yeong-Dae; Ahn, Jun Sik; Hong, Seokjun; Lee, Minjae; Cheon, Hongjin; Cho, Dongil ``Dan''; Kim, Taehyun

    2016-05-01

    To achieve ion trap based large-scale quantum computing devices, motional states of qubit ions must be regulated against heating from ion transportation or noise on the chip surface while leaving internal states of the ions intact. Sympathetic cooling is a natural solution for this problem, but trapping two different species of ions generally requires two sets of optical devices including separate lasers for each ion type, increasing the complexity and the cost of the setup. We tested Doppler-cooled 174 Yb+ ions to sympathetically cool 171 Yb+ qubit ions. Since these two isotopes have energy levels close to each other, the optical setup can be vastly simplified. We also verified that the tail of non-ideally focused cooling beam and the scattered light from the surface create excited state population in the 171 Yb+ qubit ions, as expected. This leads to occasional spontaneous emission events, which currently limits the coherence time of our qubit to a few seconds. We will also discuss our plans for optimizing the experiment, which may increase the coherence time by one or two orders of magnitude. This work was partially supported by ICT R&D program of MSIP/IITP. [10043464, Development of quantum repeater technology for the application to communication systems].

  10. Is the NBN gene mutation I171V a potential risk factor for malignant solid tumors in children?

    Science.gov (United States)

    Nowak, Jerzy; Mosor, Maria; Nowicka, Karina; Rembowska, Jolanta; Januszkiewicz, Danuta

    2011-08-01

    NBN gene is considered as one of the low-to-moderate cancer susceptibility gene. At least 4 germline NBN mutations have been found in several malignancies in adults. In our studies, we observed the high incidence of germline mutation I171V of NBN gene in breast, colorectal, larynx cancer, and in multiple primary tumors. In this study, we would like to answer the question whether I171V germline mutation of NBN gene may constitute risk factor for solid tumors in children. The frequency of this mutation has been analyzed in patients with neuroblastoma (n=66), Wilms tumor (n=54), medulloblastoma (n=57), and rhabdomyosarcoma (n=82) hospitalized in Pediatric Oncology, Hematology and Bone Marrow Transplantation Department in the years between 1987 and 2010. About 2947 anonymous blood samples collected on Guthrie cards drawn from the newborn screening program of the Wielkopolska region have been used as controls. All the patients and controls came from the same geographical region. I171V mutation of the NBN gene has been observed in 5 controls. Among children with solid tumors only in 1 child with medulloblastoma I171V variant has been found. In conclusion, I171V germline mutation in contrary to adults cannot be considered as a risk factor for children malignancies. However, owing to low number of patients with solid tumors the possibility of a Type II error may exist.

  11. Technology of the transformation of gas and liquid for the drilling fluid in well Yuanlu-171%元陆171井气液转换钻井液技术

    Institute of Scientific and Technical Information of China (English)

    张雪松

    2015-01-01

    The author summarized the technology of the transformation of gas and liquid for the drilling fluid in well Yuanlu-171.The application results show that the drilling period was reduced by selecting appropriate drilling fluid system and making effective measures.%综述了元陆171井气液转换钻井技术.应用结果表明,选择合适的体系和制定有效的转换措施可以极大减少钻井周期.

  12. Over-expression of microRNA171 affects phase transitions and floral meristem determinancy in barley

    Directory of Open Access Journals (Sweden)

    Curaba Julien

    2013-01-01

    Full Text Available Abstract Background The transitions from juvenile to adult and adult to reproductive phases of growth are important stages in the life cycle of plants. The regulators of these transitions include miRNAs, in particular miR156 and miR172 which are part of a regulatory module conserved across the angiosperms. In Arabidopsis miR171 represses differentiation of axillary meristems by repressing expression of SCARECROW-LIKE(SCL transcription factors, however the role of miR171 has not been examined in other plants. Results To investigate the roles of mir171 and its target genes in a monocot, the Hvu pri-miR171a was over-expressed in barley (Hordeum vulgare L. cv. Golden promise leading to reduced expression of at least one HvSCL gene. The resulting transgenic plants displayed a pleiotropic phenotype which included branching defects, an increased number of short vegetative phytomers and late flowering. These phenotypes appear to be the consequence of changes in the organisation of the shoot meristem. In addition, the data show that miR171 over-expression alters the vegetative to reproductive phase transition by activating the miR156 pathway and repressing the expression of the TRD (THIRD OUTER GLUME and HvPLA1 (Plastochron1 genes. Conclusions Our data suggest that some of the roles of miR171 and its target genes that have been determined in Arabidopsis are conserved in barley and that they have additional functions in barley including activation of the miR156 pathway.

  13. Chimeric antibody with human constant regions and mouse variable regions directed against carcinoma-associated antigen 17-1A

    Energy Technology Data Exchange (ETDEWEB)

    Sun, L.K.; Curtis, P.; Rakowicz-Szulczynska, E.; Ghrayeb, J.; Chang, N.; Morrison, S.L.; Koprowski, H.

    1987-01-01

    The authors have cloned the genomic DNA fragments encoding the heavy and light chain variable regions of monoclonal antibody 17-1A, and they have inserted them into mammalian expression vectors containing genomic DNA segments encoding human ..gamma..3 and kappa constant regions. The transfer of these expression vectors containing mouse-human chimeric immunoglobulin genes into Sp2/0 mouse myeloma cells resulted in the production of functional IgG that retained the specific binding to the surface antigen 17-1A expressed on colorectal carcinoma cells.

  14. Adsorption of Reactive Blue 171 from Aqueous Solution using Low Cost Activated Carbon Prepared from Agricultural Solid Waste: Albizia amara

    Directory of Open Access Journals (Sweden)

    K. Anitha

    2015-07-01

    Full Text Available The adsorption of Reactive Blue 171 (Reactive Dye from aqueous solution using activated carbon prepared from Albizia amara pod shell waste as an adsorbent have been carried out. The experimental adsorption data fitted reasonably well to Langmuir and Freundlich adsorption isotherms. Kinetic parameters as a function of Initial dye concentration have been calculated and the kinetic data were substituted in Pseudo First Order, Elovich and Pseudo Second order equations. A probable explanation is offered to account for the results of kinetic study. The thermodynamic parameter enthalpy change (∆H suggests the exothermic nature of absorption of Reactive Blue 171 onto activated Albizia amara pod shell waste carbon.

  15. Production, separation and target preparation of 171Tm an 147Pm for neutron cross section measurements

    CERN Document Server

    Heinitz, S; Schumann, D; Dressler, R; Kivel, N; Guerrero, C; Köster, U; Tessler, M; Paul, M; Halfon, S

    2015-01-01

    The knowledge of the neutron capture cross sections of s-process branching point isotopes represents a basic requirement for the understanding of star evolution. Since such branching point isotopes are by definition radioactive, the measurement of their cross sections from thermal to stellar energies becomes a challenging task. Considerable amounts of material have to be produced, representing a significant radioactive hazard. We report here on the production and separation of 3.5 mg 171Tm from 240 mg 170Er2O3 and 72 µg 147Pm from 100 mg 146Nd2O3 irradiated at the ILL high flux reactor. Thin targets were prepared with high chemical and radioisotopic purity suitable for neutron capture measurements at n_TOF CERN and the SARAF-LiLiT facility.

  16. Modification of radiobiological effects of 171 MeV protons by elements of physical protection

    Science.gov (United States)

    Bulinina, Taisia; Shurshakov, Vyacheslav; Ivanov, Alexander; Molokanov, Alexander

    2016-07-01

    Space radiation includes protons of various energies. Physical protection is effective in the case of low energy protons (50-100 MeV) and becomes insufficient for radiation with a high part of high-energy protons. In the experiment performed on outbred mice, the purpose of the study was to evaluate the radiobiological effect of 171 MeV protons and protons modified by elements of physical protection of the spacecraft, on a complex of indicators of the functional condition of the system hematopoiesis and the central nervous system in 24 hours after irradiation at 20 cGy dose. The spacecraft radiation protection elements used in the experiment were a construction of wet hygiene wipes called a «protective curtain», and a glass plate imitating an ISS window. Mass thickness of the " protective curtain" in terms of water equivalent was ̴ 6,2 g/cm2. Physical shielding along the path of 171 MeV protons increases their linear energy transfer leading to the absorbed dose elevation and strengthening of the radiobiological effect. In the experiment, the two types of shielding together raised the absorbed dose from 20 to 23.2 cGy. Chemically different materials (glass and water in the wipes) were found to exert unequal modifying effects on physical and biological parameters of the proton-irradiated mice. There was a distinct dose-dependent reduction of bone marrow cellularity within the dose range from 20 cGy to 23.2 cGy in 24 hours after exposure. No modifying effect of the radiation protection elements on spontaneous motor activity was discovered when compared with entrance protons. The group of animals protected by the glass plate exhibited normal orientative-trying reactions and weakened grip with the forelimbs. The effects observed in the experiment indicate the necessity to carry out comprehensive radiobiological researches (physical, biological and mathematical) in assessing the effects of physical protection, that are actual for ensuring radiation safety of crews in

  17. Development and Characterization of a 171Yb+ Miniature Ion Trap Frequency Standard

    CERN Document Server

    Partner, Heather L

    2012-01-01

    This dissertation reports on the development of a low-power, high-stability miniature atomic frequency standard based on 171Yb+ ions. The ions are buffer-gas cooled and held in a linear quadrupole trap that is integrated into a sealed, getter-pumped vacuum package, and interrogated on the 12.6 GHz hyperfine transition. We hope to achieve a long-term fractional frequency stability of 10^-14 with a miniature clock that consumes only 50 mW of power and occupies a volume of 5 cm^3. I discuss our progress over several years of work on this project. We began by building a conventional tabletop clock to use as a test bed while developing several designs of miniature ion-trap vacuum packages, while also developing techniques for various aspects of the clock operation, including ion loading, laser and magnetic field stabilization, and a low power ion trap drive. The ion traps were modeled using boundary element software to assist with the design and parameter optimization of new trap geometries. We expect a novel trap...

  18. Sensitivity requirements of assisted BDS and GPS in specification 3GPP TS 36.171

    Science.gov (United States)

    Jin, Xiaoxi; Chen, Xin; Ying, Rendong; Yang, Genke

    2016-01-01

    With the needs of growing location-based service, a more high-performance satellite positioning technology - assisted global navigation satellite system (A-GNSS assisted-GNSS) becomes a new hotspot in area of navigation and positioning. Now, 3GPP has already provided supports for GPS, Galileo, GLONASS and QZSS, SBAS, so standardization work of introduction BDS into 3GPP organization is very imperative. In this paper, we first analysis the performance of GPS L1 C/A with assistant information, then by taking into account the difference between BDS and GPS, including the unique nature of GEO/NGEO satellites' navigation message data length and format, we design the sensitivity requirements of BDS B1 following A-GPS. The results between A-GPS and A-BDS of typical sensitivity test cases are shown in this paper, which show that the suggested sensitivity requirements satisfy the minimum performance requirements under technical specification of 3GPP TS 36.171.

  19. High-accuracy optical clock based on the octupole transition in 171Yb+

    CERN Document Server

    Huntemann, N; Lipphardt, B; Weyers, S; Tamm, Chr; Peik, E

    2011-01-01

    We experimentally investigate an optical frequency standard based on the 467 nm (642 THz) electric-octupole reference transition 2S1/2(F=0) -> F7/2(F=3) in a single trapped 171Yb+ ion. The extraordinary features of this transition result from the long natural lifetime and from the 4f136s2 configuration of the upper state. The electric quadrupole moment of the 2F7/2 state is measured as -0.041(5) e(a0)^2, where e is the elementary charge and a0 the Bohr radius. We also obtain information on the differential scalar and tensorial components of the static polarizability and of the probe light induced ac Stark shift of the octupole transition. With a real-time extrapolation scheme that eliminates this shift, the unperturbed transition frequency is realized with a fractional uncertainty of 7.1x10^(-17). The frequency is measured as 642 121 496 772 645.15(52) Hz with the uncertainty essentially determined by the employed caesium fountain reference.

  20. [A role for hypnosis in cataract surgery: Report of 171 procedures].

    Science.gov (United States)

    Agard, E; Pernod, C; El Chehab, H; Russo, A; Haxaire, M; Dot, C

    2016-03-01

    To study the effectiveness of relaxation hypnosis in outpatient cataract surgery. Prospective study of 171 patients undergoing cataract surgery under hypnosis, performed by the same nurse anesthetist. The procedures were performed by 2 senior surgeons, A and B (A=78 surgeries, and B=93 surgeries) under topical anesthesia and with a 2.2-mm mini-incision. The hypnosis group (n=102) was compared to a control group (n=69) according to quantitative, objective criteria: hemodynamic changes and the need for intravenous medication in operating room, as well as subjective, qualitative criteria: surgical comfort, effectiveness of hypnosis, and patient satisfaction. Subgroup analyses by surgeon, 1st and 2nd eye surgery, were performed. Hemodynamic parameters were not significantly different between the 2 groups: systolic blood pressure (P=0.06) and maximum heart rate (P=0.25). However, the use of intraoperative intravenous medication was significantly higher in the control group (49.3% versus 21.6%, Phypnosis group reported a mean comfort rating of 8.4/10, and 100% were satisfied with this hypnosis experience. Preliminary results of this study are very positive for all three parties: patient/anesthetist/surgeon. They are leading to an expanded university training program for operating room personnel in order to improve quality of care and reduce premedication in elderly patients so as to facilitate their return to home. Copyright © 2015 Elsevier Masson SAS. All rights reserved.

  1. High-accuracy optical clock based on the octupole transition in 171Yb+.

    Science.gov (United States)

    Huntemann, N; Okhapkin, M; Lipphardt, B; Weyers, S; Tamm, Chr; Peik, E

    2012-03-02

    We experimentally investigate an optical frequency standard based on the 467 nm (642 THz) electric-octupole reference transition (2)S(1/2)(F=0)→(2)F(7/2)(F=3) in a single trapped (171)Yb(+) ion. The extraordinary features of this transition result from the long natural lifetime and from the 4f(13)6s(2) configuration of the upper state. The electric-quadrupole moment of the (2)F(7/2) state is measured as -0.041(5)ea(0)(2), where e is the elementary charge and a(0) the Bohr radius. We also obtain information on the differential scalar and tensorial components of the static polarizability and of the probe-light-induced ac Stark shift of the octupole transition. With a real-time extrapolation scheme that eliminates this shift, the unperturbed transition frequency is realized with a fractional uncertainty of 7.1×10(-17). The frequency is measured as 642 121 496 772 645.15(52) Hz.

  2. Contrat d'installation des cables C171 methodologie et expériences

    CERN Document Server

    Guillaume, J-C

    2004-01-01

    Depuis l'été 2001, le contrat C171 intervient dans tous les accélérateurs du CERN pour le tirage des câbles, le montage des connecteurs et le test des liaisons installées. Les interventions sur le terrain se font principalement sous la forme de campagnes de tirage, ce qui permet de limiter les interventions dans le temps et dans l'espace. Après avoir rappelé les caractéristiques principales de ce contrat, la méthodologie utilisée, le rôle des différents protagonistes et le travail effectué en 2003, on abordera les problèmes rencontrés durant les premières campagnes du LHC. Afin d'apporter des solutions et d'augmenter la qualité de la prestation, le Plan Qualité, déjà en place depuis 2002, a été enrichi de procédures et modes opératoires supplémentaires.

  3. TRANSFORMATION OF BACILLUS THURINGIENSIS RECIPIENT BMB171 BY ELECTROPORATION%电脉冲法转化苏云金芽孢杆菌BMB171的研究

    Institute of Scientific and Technical Information of China (English)

    李林; 邵宗泽; 喻子牛

    2000-01-01

    研究了用电脉冲法转化苏云金芽孢杆菌受体菌BMB171的优化条件以及由转化导入的几类cry基因在BMB171中的表达效果.结果表明,采用SG溶液作电脉冲缓冲液,用10.0kV/cm的脉冲场强和1次电脉冲(4.6ms)以及采用对数前期(OD650nm为0.2~0.3)收获的受体菌,可以达到最高转化频率,其中用pHT3101电转化BMB171的最高频率达8×107转化子/μgDNA.转化频率随质粒pHT3101浓度的增加,在54.69p9/mL至3.50μg/mL范围内呈线性增加,随后达到饱和.转入的几种外源质粒在BMB171中可分别表达其携带的cry1Ac10,cry1Ab,cry1Ca和cry3Aa基因,产生特征性的杀虫晶体蛋白,并形成典型的伴孢晶体.

  4. Neutron Capture Cross Sections of the s-Process Branching Points 147Pm, 171Tm, and 204Tl

    Science.gov (United States)

    Guerrero, Carlos; Domingo-Pardo, Cesar; Lerendegui-Marco, Jorge; Casanovas, Adria; Cortes-Giraldo, Miguel A.; Dressler, Rugard; Halfon, Shlomi; Heinitz, Stephan; Kivel, Niko; Köster, Ulli; Paul, Michael; Quesada-Molina, Jose Manuel; Schumann, Dorothea; Tarifeño-Saldivia, Ariel; Tessler, Moshe; Weissman, Leo

    The neutron capture cross section of several key unstable isotopes acting as branching points in the s-process are crucial for stellar nucleosynthesis studies, but they are very challenging to measure due to the difficult production of sufficient sample material, the high activity of the resulting samples, and the actual (n, γ) measurement, for which high neutron fluxes and effective background rejection capabilities are required. As part of a new program to measure some of these important branching points, radioactive targets of 147Pm, 171Tm, and 204Tl have been produced by irradiation of stable isotopes (146Nd, 170Er, and 203Tl) at the Institut Laue-Langevin (ILL) high flux reactor. After breeding in the reactor and a certain cooling period, the resulting mixed 204Tl/203Tl sample was used directly while 147Pm and 171Tm were radiochemically separated in non-carrier-added quality at the Paul Scherrer Institut (PSI), then prepared as targets. A set of theses samples has been used for time-of-flight measurements at the CERN n_TOF facility using the 19 and 185 m beam lines, during 2014 and 2015. The capture cascades were detected with a set of four C6D6 scintillators, allowing to observe the associated neutron capture resonances. The results presented in this work are the first ever determination of the resonance capture cross sections of 147Pm, 171Tm, and 204Tl. Activation experiments on the same 147Pm and 171Tm targets with a high-intensity quasi-Maxwellian flux of neutrons have been performed using the SARAF accelerator and the Liquid-Lithium Target (LiLiT) in order to extract the corresponding Maxwellian Average Cross Section (MACS). The experimental setups are here described together with the first, preliminary results of the n_TOF measurement.

  5. Rapid detection of TiO2 (E171) in table sugar using Raman spectroscopy.

    Science.gov (United States)

    Tan, Chen; Zhao, Bin; Zhang, Zhiyun; He, Lili

    2017-02-01

    The potential toxic effects of titanium dioxide (TiO2) to humans remain debatable despite its broad application as a food additive. Thus, confirmation of the existence of TiO2 particles in food matrices and subsequently quantifying them are becoming increasingly critical. This study developed a facile, rapid (TiO2 particles (E171) from food products (e.g., table sugar) by Raman spectroscopy. To detect TiO2 particles from sugar solution, sequential centrifugation and washing procedures were effectively applied to separate and recover 97% of TiO2 particles from the sugar solution. The peak intensity of TiO2 sensitively responded to the concentration of TiO2 with a limit of detection (LOD) of 0.073 mg kg(-1). In the case of sugar granules, a mapping technique was applied to directly estimate the level of TiO2, which can be potentially used for rapid online monitoring. The plot of averaged intensity to TiO2 concentration in the sugar granules exhibited a good linear relationship in the wide range of 5-2000 mg kg(-1), with an LOD of 8.46 mg kg(-1). Additionally, we applied Raman spectroscopy to prove the presence of TiO2 in sugar-coated doughnuts. This study begins to fill in the analytical gaps that exist regarding the rapid detection and quantification of TiO2 in food, which facilitate the risk assessment of TiO2 through food exposure.

  6. [HIV screening through rapid testing to pregnant women in the Family Medicine Unit 171].

    Science.gov (United States)

    Figueroa-Hernández, Gustavo; Uriostegui-Espíritu, Lizbeth Carlota; Delgado-Quiñones, Edna Gabriela

    2016-01-01

    Introducción: la cobertura de detección del VIH en nuestro país mediante la prueba rápida se ha incrementado, al pasar de un 8.2 % en el 2006 a un 59.8 % en el 2012; sin embargo, aún sigue siendo deficiente. El objetivo es determinar la prevalencia de detección de VIH mediante la prueba rápida a mujeres embarazadas. Métodos: se realizó un estudio transversal descriptivo con muestreo no probabilístico que incluyó mujeres embarazadas de cualquier edad que acudieron a control de embarazo en la Unidad de Medicina Familiar 171 del Instituto Mexicano del Seguro Social. Se aplicó como instrumento la revisión del expediente clínico para recabar información sobre la prueba rápida. Se calculó una muestra de 85 pacientes y se realizó el análisis estadístico descriptivo. Resultados: se revisaron 85 expedientes de pacientes en control por embarazo. La prueba rápida (PR) para detección de anticuerpos contra el VIH se le aplicó a 79 pacientes (93 %). En nueve (10 %), no se encontró reporte del resultado en el expediente. En seis pacientes del total de la muestra (7 %) no se solicitó o realizó la PR. El resultado de todas las pruebas rápidas reportadas fue negativo a VIH. Conclusiones: existe un incremento en la cobertura de pruebas rápidas de detección de VIH en embarazadas; sin embargo, no reportarla y no solicitarla siguen siendo problemas frecuentes en la detección oportuna de infección por VIH en embarazadas.

  7. Microstructure and dielectric properties of dysprosium-doped barium titanate ceramics Microestrutura e propriedades dielétricas de cerâmicas de titanato de bário dopado com disprósio

    Directory of Open Access Journals (Sweden)

    Y. Pu

    2005-09-01

    Full Text Available The substitution behavior and lattice parameter of barium titanate between solid_solubility with a dopant concentration in the range of 0.25 to 1.5 mol% are studied. The influences of dysprosium-doped fraction on the grain size and dielectric properties of barium titanate ceramic, including dielectric constant and breakdown electric field strength, are investigated via scanning electronic microscopy, X-ray diffraction and electric property tester. The results show that, at a dysprosium concentration of 0.75 mol%, the abnormal grain growth is inhibited and the lattice parameters of grain rise up to the maximum because of the lowest vacancy concentration. In addition, the finegrain and high density of barium titanate ceramic result in its excellent dielectric properties. The relative dielectric constant (25 °C reaches to 4100. The temperature coefficient of the capacitance varies from -10 to 10% within the temperature range of -15 °C -100 °C, and the breakdown electric field strength (alternating current achieves 3.2 kV/mm. These data suggest that our barium titanate could be used in the manufacture of high voltage ceramic capacitors.Foram estudados o comportamento da substituição e o parâmetro de rede de titanato de bário da solubilidade sólida com uma concentração de dopante na faixa 0,25-1,5 mol%. As influências da fração do dopante disprósio no tamanho de grão e nas propriedades dielétricas da cerâmica de titanato de bário, incluindo constante dielétrica e rigidez dielétrica foram investigadas por meio de microscopia eletrônica de varredura, difração de raios X e teste de propriedades elétricas. Os resultados mostram que a uma concentração de disprósio de 0,75 mol% o crescimento anormal de grão é inibido e os parâmetros de rede aumentam até um máximo devido a menor concentração de vacâncias. Além disso, as cerâmicas de grãos pequenos e alta densidade resultam em excelentes propriedades dielétricas. A

  8. Neodymium Dysprosium Modified Starch- coated Magnetic Fluid Preparation of Ferrite%淀粉包覆镝钕改性铁氧体磁性液体的制备

    Institute of Scientific and Technical Information of China (English)

    林穗云; 周育辉

    2011-01-01

    In this paper, in order to obtain the ferrite magnetic fluids of higher saturation magnetic intensity with simple technology, nanometer magnetite ( Fe3O4 ) particles ware prepared by chemical co - precipitation. And to a certain proportion of Dysprosium Neodymium ferrite magnetic fluids on the modification, we selected starch prepara- tion for the relief of water - based coating of rare earth iron oxide magnetic fluid composites. We also investigated the amount of Nd - Dy, the amount of coating agent, reaction temperature, coating temperature on the performance of the products and the effects of particle size, and its preliminary characterization was also performed . Through experiment,we summed up, under n (Fe) : [ n ( Nd3+ ) + n ( Dy3+ ) ] = 30:1 and n ( Fe3 + ) : n ( Fe2 + ) = 1.70 ~ 1. 75, the ratio for use of dysprosium and neodymium is n(Dy3+ ) : n(Nd3+ ) =4:1, 25%NH3 · H2O(A. R. ) as precipitating agent and pH value conditioner; the reacting system temperature was controlled in 35 ℃, and the pH value was adjusted to 9 ~ 11 ; the best dosage of starch as the relief is O. 0050g each 6OraL magnetic fluids, the temperature of surfactant was controlled in 50℃ and the pH value was adjusted to 2 ~ 3. In such system under the conditions of a water - based rare - earth compound Nd Dy Fe Magnetic, fluid magnetic oxygen was higher than or- dinary water- based ferrite.%为制备工艺简单且饱和磁化强度高的磁流体,本文采用化学共沉淀法制得了纳米磁性Fe304粒子.然后以一定比例的镝钕对铁氧体磁流体改性,选择淀粉为包覆剂制备水基稀土复合铁氧磁流体.考察了镝钕的用量、包覆剂的用量、反应温度、包覆温度等因素对产物粒径及性能的影响,并对其进行了初步的性能表征.实验总结出适宜的条件:在n(Fe):[n(Nd3+)+n(Dy3+)]=30:1,n(Fe3+):n(Fe2+)=1.70~1.75

  9. 10 CFR Appendix B to Part 30 - Quantities 1 of Licensed Material Requiring Labeling

    Science.gov (United States)

    2010-01-01

    ... Cesium-135 10 Cesium-136 10 Cesium-137 10 Chlorine-36 10 Chlorine-38 10 Chromium-51 1,000 Cobalt-58m 10 Cobalt-58 10 Cobalt-60 1 Copper-64 100 Dysprosium-165 10 Dysprosium-166 100 Erbium-169 100 Erbium-171...

  10. Ginkgolic Acid C 17:1, Derived from Ginkgo biloba Leaves, Suppresses Constitutive and Inducible STAT3 Activation through Induction of PTEN and SHP-1 Tyrosine Phosphatase

    Directory of Open Access Journals (Sweden)

    Seung Ho Baek

    2017-02-01

    Full Text Available Ginkgolic acid C 17:1 (GAC 17:1 extracted from Ginkgo biloba leaves, has been previously reported to exhibit diverse antitumor effect(s through modulation of several molecular targets in tumor cells, however the detailed mechanism(s of its actions still remains to be elucidated. Signal transducer and activator of transcription 3 (STAT3 is an oncogenic transcription factor that regulates various critical functions involved in progression of diverse hematological malignancies, including multiple myeloma, therefore attenuating STAT3 activation may have a potential in cancer therapy. We determined the anti-tumor mechanism of GAC 17:1 with respect to its effect on STAT3 signaling pathway in multiple myeloma cell lines. We found that GAC 17:1 can inhibit constitutive activation of STAT3 through the abrogation of upstream JAK2, Src but not of JAK1 kinases in U266 cells and also found that GAC can suppress IL-6-induced STAT3 phosphorylation in MM.1S cells. Treatment of protein tyrosine phosphatase (PTP inhibitor blocked suppression of STAT3 phosphorylation by GAC 17:1, thereby indicating a critical role for a PTP. We also demonstrate that GAC 17:1 can induce the substantial expression of PTEN and SHP-1 at both protein and mRNA level. Further, deletion of PTEN and SHP-1 genes by siRNA can repress the induction of PTEN and SHP-1, as well as abolished the inhibitory effect of drug on STAT3 phosphorylation. GAC 17:1 down-regulated the expression of STAT3 regulated gene products and induced apoptosis of tumor cells. Overall, GAC 17:1 was found to abrogate STAT3 signaling pathway and thus exert its anticancer effects against multiple myeloma cells.

  11. Absolute frequency measurement of the {{}^{1}}{{\\text{S}}_{0}} – {{}^{3}}{{\\text{P}}_{0}} transition of 171Yb

    Science.gov (United States)

    Pizzocaro, Marco; Thoumany, Pierre; Rauf, Benjamin; Bregolin, Filippo; Milani, Gianmaria; Clivati, Cecilia; Costanzo, Giovanni A.; Levi, Filippo; Calonico, Davide

    2017-02-01

    We report the absolute frequency measurement of the unperturbed transition {{}1}{{\\text{S}}0} – {{}3}{{\\text{P}}0} at 578 nm in 171Yb realized in an optical lattice frequency standard relative to a cryogenic caesium fountain. The measurement result is 518 295 836 590 863.59(31) Hz with a relative standard uncertainty of 5.9× {{10}-16} . This value is in agreement with the ytterbium frequency recommended as a secondary representation of the second in the International System of Units.

  12. 表面修饰对镝铁氧体纳米磁粒子的合成及其磁性能的影响%Effect of Surface Modification on Formation and Magnetic Property of Dysprosium Ferrite Nanomagnetic Particles

    Institute of Scientific and Technical Information of China (English)

    陈静; 张茂润; 邓真娟

    2011-01-01

    利用湿化学法制备镝铁氧体纳米磁粒子时,用适量的阴离子表面活性剂进行表面修饰,能够有效地控制磁粒子的粒径,同时避免干燥时产生硬团聚.文章介绍了用月桂酸、月桂酸钠、正十二烷基硫酸钠对磁粒子进行表面修饰的研究结果,探讨了三者及其用量对磁粒子的形成及磁性能的影响.借助X射线衍射仪(XRD)、透射电镜(TEM)、振动样品磁强计(VSM)、红外光谱仪(IR)对产物的性能进行了表征.结果表明,用月桂酸修饰后的产物具有Fe3O4磁粒子的晶型结构且结晶度高、磁性能优异、平均粒径约16nm;用月桂酸钠、正十二烷基硫酸钠修饰后的产物不具有Fe3O4磁粒子的晶型结构,结晶度低且磁性能差.%When wet chemical method are use to prepare dysprosium-doped ferrite magnetic nanoparticles, right a-mount of anionic surfactant were doped as surface modification, which can effectively control the size of magnetic particles, and avoid producing hard reunion when dry out. This paper introduces the research results of magnetic particle surface modification by using lauric acid, laurel acid sodium and lauryl sodium sulfate, discusses the effect of lauric acid, laurel acid sodium and lauryl sodium sulfate and their dosages on the formation of magnetic and its magnetic property. The properties of the product can be characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), infrared spectrometer (IR). The results showed that the product modified with lauric acid have a crystalline structure of Fe3O4 magnetic particles and high crystallin-ity, excellent magnetic properties. The average particle size is about 16 nm; the product modified with laurel acid sodium and lauryl sodium sulfate does not have the crystalline structure of Fe3O4 magnetic particles, with low crystal-linity and low magnetic property.

  13. Preclinical Assessment of CD171-Directed CAR T-cell Adoptive Therapy for Childhood Neuroblastoma: CE7 Epitope Target Safety and Product Manufacturing Feasibility.

    Science.gov (United States)

    Künkele, Annette; Taraseviciute, Agne; Finn, Laura S; Johnson, Adam J; Berger, Carolina; Finney, Olivia; Chang, Cindy A; Rolczynski, Lisa S; Brown, Christopher; Mgebroff, Stephanie; Berger, Michael; Park, Julie R; Jensen, Michael C

    2017-01-15

    The identification and vetting of cell surface tumor-restricted epitopes for chimeric antigen receptor (CAR)-redirected T-cell immunotherapy is the subject of intensive investigation. We have focused on CD171 (L1-CAM), an abundant cell surface molecule on neuroblastomas and, specifically, on the glycosylation-dependent tumor-specific epitope recognized by the CE7 monoclonal antibody. CD171 expression was assessed by IHC using CE7 mAb in tumor microarrays of primary, metastatic, and recurrent neuroblastoma, as well as human and rhesus macaque tissue arrays. The safety of targeting the CE7 epitope of CD171 with CE7-CAR T cells was evaluated in a preclinical rhesus macaque trial on the basis of CD171 homology and CE7 cross reactivity. The feasibility of generating bioactive CAR T cells from heavily pretreated pediatric patients with recurrent/refractory disease was assessed. CD171 is uniformly and abundantly expressed by neuroblastoma tumor specimens obtained at diagnoses and relapse independent of patient clinical risk group. CD171 expression in normal tissues is similar in humans and rhesus macaques. Infusion of up to 1 × 10(8)/kg CE7-CAR(+) CTLs in rhesus macaques revealed no signs of specific on-target off-tumor toxicity. Manufacturing of lentivirally transduced CD4(+) and CD8(+) CE7-CAR T-cell products under GMP was successful in 4 out of 5 consecutively enrolled neuroblastoma patients in a phase I study. All four CE7-CAR T-cell products demonstrated in vitro and in vivo antitumor activity. Our preclinical assessment of the CE7 epitope on CD171 supports its utility and safety as a CAR T-cell target for neuroblastoma immunotherapy. Clin Cancer Res; 23(2); 466-77. ©2016 AACR. ©2016 American Association for Cancer Research.

  14. F-state quenching with CH4 for buffer-gas cooled 171Y b+ frequency standard

    Directory of Open Access Journals (Sweden)

    Y.-Y. Jau

    2015-11-01

    Full Text Available We report that methane, CH4, can be used as an efficient F-state quenching gas for trapped ytterbium ions. The quenching rate coefficient is measured to be (2.8 ± 0.3 × 106 s−1 Torr−1. For applications that use microwave hyperfine transitions of the ground-state 171Y b ions, the CH4 induced frequency shift coefficient and the decoherence rate coefficient are measured as δν/ν = (−3.6 ± 0.1 × 10−6 Torr−1 and 1/T2 = (1.5 ± 0.2 × 105 s−1 Torr−1. In our buffer-gas cooled 171Y b+ microwave clock system, we find that only ≤10−8 Torr of CH4 is required under normal operating conditions to efficiently clear the F-state and maintain ≥85% of trapped ions in the ground state with insignificant pressure shift and collisional decoherence of the clock resonance.

  15. u171gm.m77t - MGD77 data file for Geophysical data from field activity UGEOLEG_1 (U-1-71-GM) in Bay of Campeche, Gulf of Mexico from 05/27/1971 to 06/21/1971

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry, gravity, and magnetic data along with transit satellite navigation data was collected as part of field activity UGEOLEG_1 (U-1-71-GM) in Bay...

  16. u171gm.m77t - MGD77 data file for Geophysical data from field activity UGEOLEG_1 (U-1-71-GM) in Bay of Campeche, Gulf of Mexico from 05/27/1971 to 06/21/1971

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry, gravity, and magnetic data along with transit satellite navigation data was collected as part of field activity UGEOLEG_1 (U-1-71-GM) in Bay...

  17. 射频消融治疗171例阵发性室上性心动过速%Radiofrequency ablation in treatment of 171 patients with paroxysmal supraventricular tachycardia

    Institute of Scientific and Technical Information of China (English)

    刘英; 刘惠亮; 马春梅; 张敬明; 罗建平; 马东星

    2005-01-01

    射频消融(Radio frequency catheter ablation,RFCA)治疗快速心律失常是目前心脏病学中唯一真正的根治性技术,具有安全、不开刀、疗效确切等优点,正逐渐在临床推广应用。我院自1999年至今对171例阵发性室上性心动过速(Paroxysmal supraventricular tachycardia,PSVT)患者行RFCA治疗,取得了满意疗效,无一例严重并发症,现报道如下。

  18. A catalog of 171 high-quality binary black-hole simulations for gravitational-wave astronomy

    CERN Document Server

    Mroue, Abdul H; Szilagyi, Bela; Pfeiffer, Harald P; Boyle, Michael; Hemberger, Daniel A; Kidder, Lawrence E; Lovelace, Geoffrey; Ossokine, Sergei; Taylor, Nicholas W; Zenginoglu, Anil; Buchman, Luisa T; Chu, Tony; Foley, Evan; Giesler, Matthew; Owen, Robert; Teukolsky, Saul A

    2013-01-01

    Coalescing binary black holes are a primary science target of ground-based gravitational-wave detectors, which require detailed knowledge of the expected waveforms to maximize detections and our understanding of the waves' sources. This paper presents a catalog of numerical binary black- hole simulations that represents a major advance toward the application of numerical relativity to gravitational-wave data analysis. Specifically, the catalog contains 171 numerical simulations that maintain the high accuracy required for matched filtering while following more orbits (up to 33) than previous simulations. A larger number of orbits allows a more reliable connection to approximate analytical waveforms, which are used to extend numerical waveforms to span the entire frequency range of a detector. The catalog contains 91 precessing binaries, providing the most comprehensive survey of precessing systems to date, and includes waveforms with black-hole spins up to 0.97, mass ratios up to 8, and orbital eccentricities...

  19. Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb.

    Science.gov (United States)

    Inaba, Hajime; Hosaka, Kazumoto; Yasuda, Masami; Nakajima, Yoshiaki; Iwakuni, Kana; Akamatsu, Daisuke; Okubo, Sho; Kohno, Takuya; Onae, Atsushi; Hong, Feng-Lei

    2013-04-08

    We propose a novel, high-performance, and practical laser source system for optical clocks. The laser linewidth of a fiber-based frequency comb is reduced by phase locking a comb mode to an ultrastable master laser at 1064 nm with a broad servo bandwidth. A slave laser at 578 nm is successively phase locked to a comb mode at 578 nm with a broad servo bandwidth without any pre-stabilization. Laser frequency characteristics such as spectral linewidth and frequency stability are transferred to the 578-nm slave laser from the 1064-nm master laser. Using the slave laser, we have succeeded in observing the clock transition of (171)Yb atoms confined in an optical lattice with a 20-Hz spectral linewidth.

  20. Updated level scheme of 172Yb from 171Yb(nth, γ) reaction studied via gamma-gamma coincidence spectrometer

    Science.gov (United States)

    Nguyen, Ngoc Anh; Nguyen, Xuan Hai; Pham, Dinh Khang; Nguyen, Quang Hung; Ho, Huu Thang

    2017-08-01

    This paper provides the updated information on the level scheme of 172Yb nucleus studied via 171Yb(nth, γ) reaction using the gamma-gamma coincidence spectrometer at Dalat Nuclear Research Institute (Viet Nam). The latter is used because of its advantages in achieving the low Compton background as well as in identifying the correlated gamma transitions. We have detected in total the energies and intensities of 128 two-step gamma cascades corresponding to 79 primary transitions. By comparing the measured data with those extracted from the ENSDF library, 61 primary gamma transitions and corresponding energy levels together with 20 secondary gamma transitions are found to be the same as the ENSDF data. Beside that, 18 additional primary gamma transitions and corresponding energy levels plus 108 secondary ones are not found to currently exist in this library and they are therefore considered as the new data.

  1. 15 CFR Appendix B to Subpart L of... - Coordinates for the Department of the Interior Topographic Lease Stipulations for OCS Lease Sale 171

    Science.gov (United States)

    2010-01-01

    ... 15 Commerce and Foreign Trade 3 2010-01-01 2010-01-01 false Coordinates for the Department of the Interior Topographic Lease Stipulations for OCS Lease Sale 171 B Appendix B to Subpart L of Part 922.... B Appendix B to Subpart L of Part 922—Coordinates for the Department of the Interior...

  2. Low frequency of the scrapile resistance-associated allele and presence of lysine-171 allele of the prion protein gene in Italian Biellese ovine breed

    NARCIS (Netherlands)

    Acutis, P.L.; Sbaiz, L.; Verburg, F.J.; Riina, M.V.; Ru, G.; Moda, G.; Caramelli, M.; Bossers, A.

    2004-01-01

    Frequencies of polymorphisms at codons 136, 154 and 171 of the prion protein (PrP) gene were studied in 1207 pure-bred and cross-bred Italian Biellese rams, a small ovine breed of about 65 000 head in Italy. Aside from the five most common alleles (VRQ, ARQ, ARR, AHQ and ARH), the rare ARK allele wa

  3. Low frequency of the scrapile resistance-associated allele and presence of lysine-171 allele of the prion protein gene in Italian Biellese ovine breed

    NARCIS (Netherlands)

    Acutis, P.L.; Sbaiz, L.; Verburg, F.J.; Riina, M.V.; Ru, G.; Moda, G.; Caramelli, M.; Bossers, A.

    2004-01-01

    Frequencies of polymorphisms at codons 136, 154 and 171 of the prion protein (PrP) gene were studied in 1207 pure-bred and cross-bred Italian Biellese rams, a small ovine breed of about 65 000 head in Italy. Aside from the five most common alleles (VRQ, ARQ, ARR, AHQ and ARH), the rare ARK allele

  4. 神经内科171例孤立性眩晕患者病因分析%Cause Analysis of 171 Cases of Isolated Vertigo in Department of Neurology

    Institute of Scientific and Technical Information of China (English)

    毛晓薇; 毕晓莹

    2016-01-01

    目的:分析以眩晕为主诉患者的病因,旨在早期识别后循环缺血性孤立性眩晕。方法回顾性分析孤立性眩晕患者171例,根据病史特点、神经影像学检查、脑血管评估等辅助检查,焦虑抑郁状态通过自评焦虑或抑郁量表评价。采用卒中风险评分(Stroke Risk Score,SRS)确定眩晕患者病因,筛查危险因素。结果171例患者中,中枢性眩晕19例(11%),前庭周围性眩晕142例(83%),焦虑或抑郁10例(6%)。各组临床表现(体位诱发或加重眩晕,恶心、呕吐,眼球震颤,耳鸣,听力减退)比较无显著差异。中枢性眩晕组发病年龄、吸烟率、合并糖尿病、高血压、冠状动脉粥样硬化性心脏病、高低密度脂蛋白胆固醇血症、既往短暂性脑缺血发作/卒中史的发病率以及SRS>7分的比例等方面均显著高于周围性眩晕组(P值分别为0.001,0.004,0.023,0.015,0.021,0.002,0.006和<0.001)。中枢性眩晕组发病年龄、合并糖尿病、高血压、颈动脉狭窄的发病率以及SRS>7分的比例等方面均显著高于焦虑/抑郁组(P值分别为0.001,0.011,0.019,0.027和0.003)。周围性眩晕组合并高低密度脂蛋白胆固醇血症的发病率显著高于焦虑/抑郁组(P=0.001)。结论孤立性眩晕常见为非中枢性眩晕,而急性脑血管病也可表现为孤立性眩晕。中枢性眩晕患者在年龄、既往血管危险因素病史等方面与非中枢性眩晕有显著差异,临床诊治中应重点识别中枢性损害,避免严重后果发生。%Objective To analyze the causes of patients with isolated vertigo for early identiifcation of isolated posterior circulation ischemia vertigo. Methods The clinical data of 171 patients with isolated vertigo were retrospectively analyzed. The different causes of vertigo were determined by associated medical history, clinical signs and symptoms, and the

  5. DISCOVERY OF A GIANT RADIO HALO IN A NEW PLANCK GALAXY CLUSTER PLCKG171.9-40.7

    Energy Technology Data Exchange (ETDEWEB)

    Giacintucci, Simona [Department of Astronomy, University of Maryland, College Park, MD 20742 (United States); Kale, Ruta; Venturi, Tiziana [INAF-Istituto di Radioastronomia, via Gobetti 101, I-40129 Bologna (Italy); Wik, Daniel R.; Markevitch, Maxim, E-mail: simona@astro.umd.edu [Astrophysics Science Division, NASA/Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

    2013-03-20

    We report the discovery of a giant radio halo in a new, hot, X-ray luminous galaxy cluster recently found by Planck, PLCKG171.9-40.7. The radio halo was found using Giant Metrewave Radio Telescope observations at 235 MHz and 610 MHz, and in the 1.4 GHz data from an NRAO Very Large Array Sky Survey pointing that we have reanalyzed. The diffuse radio emission is coincident with the cluster X-ray emission, and has an extent of {approx}1 Mpc and a radio power of {approx}5 Multiplication-Sign 10{sup 24} W Hz{sup -1} at 1.4 GHz. Its integrated radio spectrum has a slope of {alpha} Almost-Equal-To 1.8 between 235 MHz and 1.4 GHz, steeper than that of a typical giant halo. The analysis of the archival XMM-Newton X-ray data shows that the cluster is hot ({approx}10 keV) and disturbed, consistent with X-ray-selected clusters hosting radio halos. This is the first giant radio halo discovered in one of the new clusters found by Planck.

  6. Discovery of a giant radio halo in a new Planck galaxy cluster PLCKG171.9-40.7

    CERN Document Server

    Giacintucci, Simona; Wik, Daniel R; Venturi, Tiziana; Markevitch, Maxim

    2013-01-01

    We report the discovery of a giant radio halo in a new, hot, X-ray luminous galaxy cluster recently found by Planck, PLCKG171.9-40.7. The radio halo was found using Giant Metrewave Radio Telescope observations at 235 MHz and 610 MHz, and in the 1.4 GHz data from a NRAO Very Large Array Sky Survey pointing that we have reanalyzed. The diffuse radio emission is coincident with the cluster X-ray emission, has an extent of ~1 Mpc and a radio power of ~5x 10^24 W/Hz at 1.4 GHz. Its integrated radio spectrum has a slope of alpha~1.8 between 235 MHz and 1.4 GHz, steeper than that of a typical giant halo. The analysis of the archival XMM-Newton X-ray data shows that the cluster is hot (~10 keV) and disturbed, consistent with X-ray selected clusters hosting radio halos. This is the first giant radio halo discovered in one of the new clusters found by Planck.

  7. The gas-dust complex NGC 7822 + S 171 (W1) linked to the CEP OB4 association

    Science.gov (United States)

    Lozinskaya, T. A.; Sitnik, T. G.; Toropova, M. S.

    1987-10-01

    The results of investigations of the gas-and-dust complex connected with the young association Cep OB4 and the cluster Be 59 are presented. Monochromatic photographs of the bright emission nebulae S 171 (W1) and NGC 7822 are obtained. The expansion velocity of a faint extended shell around W1 and Cep OB4 is confirmed to be equal to 30 - 40 km s-1. IR observations are presented. A second "inner" shell is revealed. The numerous molecular and dust clouds, emission nebulae and two faint extended shells in this region lead to the conclusion that they form a single complex associated with Cep OB4 and the young cluster Be 59. The shell-type morphology of the complex seems to be created by the stellar wind of Cep OB4 and Be 59. The expansion velocity could be explained by a supernova explosion about 3×105years ago or by a short-lived (or invisible) source of a strong stellar wind.

  8. The difference of temperament dimensions of 171 children and correlation analysis%171例儿童气质维度差异性及相关性分析

    Institute of Scientific and Technical Information of China (English)

    曹敏辉; 党政; 赵昇; 袁张英

    2011-01-01

    Objective: To explore the related effect factors of temperament dimensions of children, compare the difference of temperament dimensions of children in different months groups, provide a basis for directing psychological behaviour health care of children. Methods: 171 children aged 0 ~6 years old were selected from early integrated developmental outpatient of department of child health care in the hospital in 2008 as study objects, then they were divided into infant group (0 ~ 12 months), child group ( 13 ~ 36 months) and preschool group (37 ~72 months), temperament test software of children was used for analysis. Results: There was signiticant difference in temperament dimensions of children among different groups in certain aspects, the activity level, rhythmicity, persistence and response valve tended to moderate levels with age, which met the regularities of physiological and psychological growth and maturity. Among temperament dimensions of children, rhythmicity, persistence and response valve were related to the hospital where the children were born;activity level and distraction were related to their fathers addicted to alcohol and tobacco; phobotaxis was correlated with their fathers addicted to alcohol and tobacco and birth weight of the children; the temperament types of children were correlated with occupations of parents, the time of pure breast feeding and the hospital where the children were born. Conclusion: Paying more attention to the difference of temperameat dimensions of children at various developmental stages, displaying the superiority, avoiding disadvantages, creating conditions and optimizing the inadequacies of temperament dimensions may promote the healthy development of psychosocial behaviour of children.%目的:探讨影响儿童气质维度的相关因素,比较不同月龄组儿童气质维度的差异性,为指导儿童心理行为保健工作提供依据.方法:选取2008年儿保科早期综合发展门诊171名0~6

  9. Frequency measurement of the 2S(1/2)-2D(3/2) electric quadrupole transition in a single 171Yb+ ion.

    Science.gov (United States)

    Webster, Stephen; Godun, Rachel; King, Steven; Huang, Guilong; Walton, Barney; Tsatourian, Veronika; Margolis, Helen; Lea, Stephen; Gill, Patrick

    2010-03-01

    We report on precision laser spectroscopy of the 2S(1/2)(F = 0)-2D(3/2) (F = 2, m(F) = 0) clock transition in a single ion of 171Yb+. The absolute value of the transition frequency, determined using an optical frequency comb referenced to a hydrogen maser, is 688358979309310 +/- 9 Hz. This corresponds to a fractional frequency uncertainty of 1.3 x 10(-14).

  10. The Blake Nose Cretaceous-Paleogene (Florida Atlantic margin, ODP Leg 171B): an exemplar record of the Maastrichtian-Danian transition

    Science.gov (United States)

    Bellier, J.-P.; Marca, S.; Norris, R.D.; Kroon, D.; Klaus, A.; Alexander, I.T.; Bardot, L.P.; Barker, C.E.; Blome, C.D.; Clarke, L.J.; Erbacher, J.; Faul, K.L.; Holmes, M.A.; Huber, B.T.; Katz, M.E.; MacLeod, K.G.; Martinez-Ruiz, F. C.; Mita, I.; Nakai, M.; Ogg, J.G.; Pak, D.K.; Pletsch, T.K.; ,; Shackleton, N.J.; Smit, J.; Ussler, W.; Watkins, D.K.; Widmark, J.; Wilson, P.A.

    1997-01-01

    During ODP Leg 171B, devoted to the analysis of the Blake Plateau margin in front of Florida, 16 holes have been drilled in 5 distinct sites. The sites have documented a sedimentary succession ranging in age from Aptian to Eocene. Emphasis has been put on critical periods, comprising the Paleocene-Eocene transition, the Cretaceous-Tertiary boundary which has been cored in excellent conditions, the middle Maastrichtian extinctions and the Albian anoxic episodes.

  11. Rice osa-miR171c Mediates Phase Change from Vegetative to Reproductive Development and Shoot Apical Meristem Maintenance by Repressing Four OsHAM Transcription Factors.

    Directory of Open Access Journals (Sweden)

    Tian Fan

    Full Text Available Phase change from vegetative to reproductive development is one of the critical developmental steps in plants, and it is regulated by both environmental and endogenous factors. The maintenance of shoot apical meristem (SAM identity, miRNAs and flowering integrators are involved in this phase change process. Here, we report that the miRNA osa-miR171c targets four GRAS (GAI-RGA-SCR plant-specific transcription factors (OsHAM1, OsHAM2, OsHAM3, and OsHAM4 to control the floral transition and maintenance of SAM indeterminacy in rice (Oryza sativa. We characterized a rice T-DNA insertion delayed heading (dh mutant, where the expression of OsMIR171c gene is up-regulated. This mutant showed pleiotropic phenotypic defects, including especially prolonged vegetative phase, delayed heading date, and bigger shoot apex. Parallel expression analysis showed that osa-miR171c controlled the expression change of four OsHAMs in the shoot apex during floral transition, and responded to light. In the dh mutant, the expression of the juvenile-adult phase change negative regulator osa-miR156 was up-regulated, expression of the flowering integrators Hd3a and RFT1 was inhibited, and expression of FON4 negative regulators involved in the maintenance of SAM indeterminacy was also inhibited. From these data, we propose that the inhibition of osa-miR171c-mediated OsHAM transcription factors regulates the phase transition from vegetative to reproductive development by maintaining SAM indeterminacy and inhibiting flowering integrators.

  12. Measurements of TRACE 171A Twisting Coronal Loop Fans about a Twisted Magnetic Flux Tube Originating From Below the Photosphere

    Science.gov (United States)

    Nightingale, R. W.; Ma, G.; Ji, E.

    2009-12-01

    In our previous studies of rotating sunspots about their umbral centers over the past decade, we have been measuring the rotation at the photosphere of the cross sections of large, twisted magnetic flux tubes passing through from below. Many such rotating sunspots have been found and reported in the literature and at earlier meetings [e.g., Brown et al., Sol. Phys. 216, 79, 2003; Yan et al., ApJ 682, L65, 2008; Nightingale et al., Fall AGU Mtg. 2007]. Here we are attempting to measure the rotation of 1 million degree K EUV loops seen in TRACE 171A images emerging from what may be a large 6000 deg K magnetic flux tube (invisible at EUV), which may be the extension of the associated rotating sunspot up in the corona, for active region 9114 on August 8 - 10, 2000. These nonpotential EUV loops appear to be attached at their other end to nonrotating opposite polarity magnetic flux regions and also appear to be flipping around like a twisted jump rope that is attached to a wall at one end. In movies of these twisted coronal loop fans the rotation appears obvious, but is difficult to measure, because of the constant motion and change of intensity of the fans, which tend to obscure each other and the apparent tube center. We will show movies over the 3 days of the twisted loop fans, and details and first results of our measurements, which appear to be similar to those previously found for the associated rotating sunspot down at the photosphere. We will discuss how the twisted magnetic flux tube energizes the corona, carrying energy up from beneath the photosphere. This work was supported by NASA under the TRACE contract NAS5-38099.

  13. A polymorphic variant in the human electron transfer flavoprotein alpha-chain (alpha-T171) displays decreased thermal stability and is overrepresented in very-long-chain acyl-CoA dehydrogenase-deficient patients with mild childhood presentation

    DEFF Research Database (Denmark)

    Bross, P; Pedersen, P; Nyholm, M;

    1999-01-01

    The consequences of two amino acid polymorphisms of human electron transfer flavoprotein (alpha-T/I171 in the alpha-subunit and beta-M/T154 in the beta-subunit) on the thermal stability of the enzyme are described. The alpha-T171 variant displayed a significantly decreased thermal stability...... thermal stability) was significantly overrepresented. Subgrouping of the VLCAD patients into three phenotypic classes (severe childhood, mild childhood, and adult presentation) revealed that the overrepresentation of the alpha-T171 variant was significant only in patients with mild childhood presentation...

  14. High-quality NMR structure of human anti-apoptotic protein domain Mcl-1(171-327 for cancer drug design.

    Directory of Open Access Journals (Sweden)

    Gaohua Liu

    Full Text Available A high-quality NMR solution structure is presented for protein hMcl-1(171-327 which comprises residues 171-327 of the human anti-apoptotic protein Mcl-1 (hMcl-1. Since this construct contains the three Bcl-2 homology (BH sequence motifs which participate in forming a binding site for inhibitors of hMcl-1, it is deemed to be crucial for structure-based design of novel anti-cancer drugs blocking the Mcl1 related anti-apoptotic pathway. While the coordinates of an NMR solution structure for a corresponding construct of the mouse homologue (mMcl-1 are publicly available, our structure is the first atomic resolution structure reported for the 'apo form' of the human protein. Comparison of the two structures reveals that hMcl-1(171-327 exhibits a somewhat wider ligand/inhibitor binding groove as well as a different charge distribution within the BH3 binding groove. These findings strongly suggest that the availability of the human structure is of critical importance to support future design of cancer drugs.

  15. Heterozygous carriers of the I171V mutation of the NBS1 gene have a significantly increased risk of solid malignant tumours.

    Science.gov (United States)

    Nowak, Jerzy; Mosor, Maria; Ziółkowska, Iwona; Wierzbicka, Malgorzta; Pernak-Schwarz, Monika; Przyborska, Marta; Roznowski, Krzysztof; Pławski, Andrzej; Słomski, Ryszard; Januszkiewicz, Danuta

    2008-03-01

    Homozygous mutation 657del5 within the NBS1 gene is responsible for the majority of Nijmegen breakage syndrome (NBS) cases. NBS patients are characterised by increased susceptibility to malignancies mainly of lymphoid origin. Recently it has been postulated that heterozygous carriers of 657del5 NBS1 mutation are at higher risk of cancer development. The aim of the study was to analyse the frequency of I171V mutation in NBS1 gene in 270 women with breast cancer, 176 patients with larynx cancer, 81 with second primary tumours of head and neck, 131 with colorectal carcinoma and 600 healthy individuals. I171V mutation was present in 17 cancer patients compared with only one in healthy individuals. This constitutes 2.58% in studied patients with malignancies and 0.17% in the control group (P=0.0002; relative risk 1.827; odds ratio 15.886; 95% confidence interval 2.107-119.8). Since DNA was isolated from non malignant cells, all mutations found in cancer patients appeared to be of germinal origin. It can be concluded that NBS1 allele I171V may be a general susceptibility gene in solid tumours.

  16. Japan Report No. 171

    Science.gov (United States)

    2007-11-02

    82 14. Put into execution long-term continuous operating research on methane fermentation, thermal cracking of oil , and thermolytic gasification...vapor phase of hydrocarbons using metal family, regular structure, zeolite type, and modified zeolite catalysts . (v) Catalyst Research Common to C...previous project "new methods of producing olefins" using crude oil as the raw material; a large pilot plant of 120 tons/day capacity of raw material

  17. At PS171 (ASTERIX)

    CERN Multimedia

    1983-01-01

    The ASTERIX (Antiproton Stop Experiment with tRigger on Initial X-rays) spectrometer was setup by the CERN-Mainz-Munich-Orsay-Vancouver (TRIUMF)-Zurich Collaboration to study ppbar interactions at rest in a hydrogen gas target, and to measure the fundamental state of the exotic proton-antiproton atom produced for the purpose. Ugo Gastaldi (from back), E. Klempt (right).

  18. Impact of heterozygous c.657-661del, p.I171V and p.R215W mutations in NBN on nibrin functions.

    Science.gov (United States)

    Dzikiewicz-Krawczyk, Agnieszka; Mosor, Maria; Januszkiewicz, Danuta; Nowak, Jerzy

    2012-05-01

    Nibrin, product of the NBN gene, together with MRE11 and RAD50 is involved in DNA double-strand breaks (DSBs) sensing and repair, induction of apoptosis and cell cycle control. Biallelic NBN mutations cause the Nijmegen breakage syndrome, a chromosomal instability disorder characterised by, among other things, radiosensitivity, immunodeficiency and an increased cancer risk. Several studies have shown an association of heterozygous c.657-661del, p.I171V and p.R215W mutations in the NBN gene with a variety of malignancies but the data are controversial. Little is known, however, whether and to what extent do these mutations in heterozygous state affect nibrin functions. We examined frequency of chromatid breaks, DSB repair, defects in S-phase checkpoint and radiosensitivity in X-ray-irradiated cells from control individuals, NBS patients and heterozygous carriers of the c.657-661del, p.I171V and p.R215W mutations. While cells homozygous for c.657-661del displayed a significantly increased number of chromatid breaks and residual γ-H2AX foci, as well as abrogation of the intra-S-phase checkpoint following irradiation, which resulted in increased radiosensitivity, cells with heterozygous c.657-661del, p.I171V and p.R215W mutations behaved similarly to control cells. Significant differences in the frequency of spontaneous and ionising radiation-induced chromatid breaks and the level of persistent γ-H2AX foci were observed when comparing control and mutant cells heterozygous for c.657-661del. However, it is still possible that heterozygous NBN mutations may contribute to cancer development.

  19. Arabidopsis miR171-targeted scarecrow-like proteins bind to GT cis-elements and mediate gibberellin-regulated chlorophyll biosynthesis under light conditions.

    Science.gov (United States)

    Ma, Zhaoxue; Hu, Xupeng; Cai, Wenjuan; Huang, Weihua; Zhou, Xin; Luo, Qian; Yang, Hongquan; Wang, Jiawei; Huang, Jirong

    2014-08-01

    An extraordinarily precise regulation of chlorophyll biosynthesis is essential for plant growth and development. However, our knowledge on the complex regulatory mechanisms of chlorophyll biosynthesis is very limited. Previous studies have demonstrated that miR171-targeted scarecrow-like proteins (SCL6/22/27) negatively regulate chlorophyll biosynthesis via an unknown mechanism. Here we showed that SCLs inhibit the expression of the key gene encoding protochlorophyllide oxidoreductase (POR) in light-grown plants, but have no significant effect on protochlorophyllide biosynthesis in etiolated seedlings. Histochemical analysis of β-glucuronidase (GUS) activity in transgenic plants expressing pSCL27::rSCL27-GUS revealed that SCL27-GUS accumulates at high levels and suppresses chlorophyll biosynthesis at the leaf basal proliferation region during leaf development. Transient gene expression assays showed that the promoter activity of PORC is indeed regulated by SCL27. Consistently, chromatin immunoprecipitation and quantitative PCR assays showed that SCL27 binds to the promoter region of PORC in vivo. An electrophoretic mobility shift assay revealed that SCL27 is directly interacted with G(A/G)(A/T)AA(A/T)GT cis-elements of the PORC promoter. Furthermore, genetic analysis showed that gibberellin (GA)-regulated chlorophyll biosynthesis is mediated, at least in part, by SCLs. We demonstrated that SCL27 interacts with DELLA proteins in vitro and in vivo by yeast-two-hybrid and coimmunoprecipitation analysis and found that their interaction reduces the binding activity of SCL27 to the PORC promoter. Additionally, we showed that SCL27 activates MIR171 gene expression, forming a feedback regulatory loop. Taken together, our data suggest that the miR171-SCL module is critical for mediating GA-DELLA signaling in the coordinate regulation of chlorophyll biosynthesis and leaf growth in light.

  20. The role of short-range Cys171-Cys178 disulfide bond in maintaining cutinase active site integrity: A molecular dynamics simulation

    Energy Technology Data Exchange (ETDEWEB)

    Matak, Mehdi Youssefi [Department of Biophysics, Faculty of Biological Science, Tarbiat Modares University, Tehran (Iran, Islamic Republic of); Moghaddam, Majid Erfani, E-mail: erfani_m@modares.ac.ir [Department of Biophysics, Faculty of Biological Science, Tarbiat Modares University, Tehran (Iran, Islamic Republic of)

    2009-12-11

    Understanding structural determinants in enzyme active site integrity can provide a good knowledge to design efficient novel catalytic machineries. Fusarium solani pisi cutinase with classic triad Ser-His-Asp is a promising enzyme to scrutinize these structural determinants. We performed two MD simulations: one, with the native structure, and the other with the broken Cys171-Cys178 disulfide bond. This disulfide bond stabilizes a turn in active site on which catalytic Asp175 is located. Functionally important H-bonds and atomic fluctuations in catalytic pocket have been changed. We proposed that this disulfide bond within active site can be considered as an important determinant of cutinase active site structural integrity.

  1. The double par locus of virulence factor pB171: DNA segregation is correlated with oscillation of ParA

    DEFF Research Database (Denmark)

    Ebersbach, G; Gerdes, K; Charbon, Gitte Ebersbach

    2001-01-01

    Prokaryotic plasmids and chromosomes encode partitioning (par) loci that segregate DNA to daughter cells before cell division. Recent database analyses showed that almost all known par loci encode an ATPase and a DNA-binding protein, and one or more cis-acting regions where the proteins act. All...... par-encoded ATPases belong to one of two protein superfamilies, Walker-type and actin-like ATPases. This property was recently used to divide par loci into Types I and II loci. We show here that the Escherichia coli virulence factor pB171 encodes a double par locus that consists of one Type I and one...

  2. Generic Safety Issue (GSI) 171 -- Engineered Safety Feature (ESF) failure from a loop subsequent to LOCA: Assessment of plant vulnerability and CDF contributions

    Energy Technology Data Exchange (ETDEWEB)

    Martinez-Guridi, G.; Samanta, P.; Chu, L.; Yang, J. [Brookhaven National Lab., Upton, NY (United States)

    1998-03-01

    Generic Safety Issue 171 (GSI-171), Engineered Safety Feature (ESF) from a Loss Of Offsite Power (LOOP) subsequent to a Loss Of Coolant Accident (LOCA), deals with an accident sequence in which a LOCA is followed by a LOOP. This issue was later broadened to include a LOOP followed by a LOCA. Plants are designed to handle a simultaneous LOCA and LOOP. In this paper, the authors address the unique issues that are involved i LOCA with delayed LOOP (LOCA/LOOP) and LOOP with delayed LOCA (LOOP/LOCA) accident sequences. LOCA/LOOP accidents are analyzed further by developing event-tree/fault-tree models to quantify their contributions to core-damage frequency (CDF) in a pressurized water reactor and a boiling water reactor (PWR and a BWR). Engineering evaluation and judgments are used during quantification to estimate the unique conditions that arise in a LOCA/LOOP accident. The results show that the CDF contribution of such an accident can be a dominant contributor to plant risk, although BWRs are less vulnerable than PWRs.

  3. Core-polarization studies of nuclear-Schiff-moment-induced permanent electric dipole moments of atomic Xe129, Yb171, and Ra225

    Science.gov (United States)

    Ramachandran, S. M.; Latha, K. V. P.

    2014-10-01

    We have calculated the intrinsic electric dipole moments (EDMs) of Xe129, Yb171, Ra225 atoms induced by the nuclear Schiff moment (NSM). We use the coupled perturbed Hartree-Fock [CPHF] framework to perform this calculation. In this work, the effects of electron correlation on atomic EDMs are studied in CPHF framework by gradual inclusion of virtual orbitals of higher symmetries. Individual orbital contributions to the final magnitude of the EDM are presented. The results for the NSM-induced EDM for these atoms show a trend similar to the electron-nucleon tensor-pseudotensor (T-PT)-induced EDM, the study of which was performed elsewhere. This behavior can be attributed to the fact that the influence of virtual orbitals of higher symmetry on the magnitude of EDM is essentially the same for both T-PT and NSM-induced atomic EDMs. However, we also report in this paper, that the most dominant contribution to the atomic EDM of Xe129, Yb171, Ra225 atoms induced by the NSM arises from the s1/2-p3/2 pairings rather than the s1/2-p1/2 pairings, which were the dominantly contributing pairings for the electron-nucleon tensor-pseudotensor-induced atomic EDM.

  4. Measurement of LET (linear energy transfer) spectra using CR-39 at different depths of water irradiated by 171 MeV protons: A comparison with Monte Carlo simulation

    Energy Technology Data Exchange (ETDEWEB)

    Sahoo, G.S. [Health Physics Division, Bhabha Atomic Research Centre, Mumbai 400085 (India); Tripathy, S.P., E-mail: sam.tripathy@gmail.com [Health Physics Division, Bhabha Atomic Research Centre, Mumbai 400085 (India); Homi Bhabha National Institute, Mumbai 400094 (India); Molokanov, A.G.; Aleynikov, V.E. [Joint Institute for Nuclear Research, Dubna 141980 (Russian Federation); Sharma, S.D. [Homi Bhabha National Institute, Mumbai 400094 (India); Radiological Physics & Advisory Division, Bhabha Atomic Research Centre, Mumbai 400085 (India); Bandyopadhyay, T. [Health Physics Division, Bhabha Atomic Research Centre, Mumbai 400085 (India); Homi Bhabha National Institute, Mumbai 400094 (India)

    2016-05-11

    In this work, we have used CR-39 detectors to estimate the LET (linear energy transfer) spectrum of secondary particles due to 171 MeV proton beam at different depths of water including the Bragg peak region. The measured LET spectra were compared with those obtained from FLUKA Monte Carlo simulation. The absorbed dose (D{sub LET}), dose equivalent (H{sub LET}) were estimated using the LET spectra. The values of D{sub LET} and H{sub LET} per incident proton fluence were found to increase with the increase in depth of water and were maximum at Bragg peak. - Highlights: • Measurement of LET spectrometry using CR-39 detectors at different depths of water. • Comparison of measured spectra with FLUKA Monte carlo simulation. • Absorbed dose and dose equivalent was found to increase with depth of water.

  5. Mutation of Asp(171) and Asp(262) of the chemokine receptor CXCR4 impairs its coreceptor function for human immunodeficiency virus-1 entry and abrogates the antagonistic activity of AMD3100

    DEFF Research Database (Denmark)

    Hatse, S; Princen, K; Gerlach, L O

    2001-01-01

    by substitution of Asp(171) and/or Asp(262) by neutral asparagine residue(s). Both aspartates, but most particularly Asp(262), also proved essential for the anti-HIV-1 activity of AMD3100 against the viruses NL4.3, IIIB, and HE. In contrast, substitution of His(281) by a neutral alanine potentiated...

  6. Resolving the Shocks in Radio Galaxy Nebulae: Hubble Space Telescope and Radio Imaging of 3C 171, 3C 277.3, and PKS 2250-41

    Science.gov (United States)

    Tilak, Avanti; O'Dea, Christopher P.; Tadhunter, Clive; Wills, Karen; Morganti, Raffaella; Baum, Stefi A.; Koekemoer, Anton M.; Dallacasa, Daniele

    2005-12-01

    We present the results of Hubble Space Telescope (HST) WFPC2 medium-band and narrowband imaging and Very Large Array and MERLIN2 radio imaging of three powerful radio galaxies: 3C 171, 3C 277.3, and PKS 2250-41. We obtained images of the rest frame [O III] λ5007 and [O II] λ3727 line emission using the linear ramp filters on WFPC2. The correlations of the emission-line morphology and the [O III]/[O II] line ratios with the radio emission seen in ground-based observations are clarified by the HST imaging. We confirm that the radio lobes and hot spots are preferentially associated with lower ionization gas. The galaxy 3C 171 exhibits high surface brightness emission-line gas mainly along the radio source axis. The lowest ionization gas is seen at the eastern hot spot. In 3C 277.3 there is bright high-ionization gas (and continuum) offset just to the east of the radio knot K1. Our observations are consistent with previous work suggesting that this emission is produced by precursor gas ionized by the shock being driven into the cloud by the deflected radio jet. In PKS 2250-41 we resolve the emission-line arc that wraps around the outer rim of the western lobe. The lower ionization [O II] emission is nested just interior to the higher ionization [O III] emission, suggesting that we have resolved the cooling region behind the bow shock. We also detect possible continuum emission from the secondary hot spot. Thus, our observations support the hypothesis that in these sources the interaction between the expanding radio source and the ambient gas strongly influences the morphology, kinematics, and ionization of the gas. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. These observations are associated with program 6657 (principal investigator C. Tadhunter).

  7. An exceptionally strengthened East Asian summer monsoon event between 19.9 and 17.1 ka BP recorded in a Hulu stalagmite

    Institute of Scientific and Technical Information of China (English)

    L.; R.; EDWARDS

    2009-01-01

    A stalagmite-based isotope record (No. H82) from Nanjing Hulu Cave, spanning from 16.5 to 10.3 ka BP, provided strong evidence for a coherence relation between the East Asian summer monsoon (EASM) and the North Atlantic climates on millennial time scales. Here we extend the high-resolution δ 18O time series back to 22.1 ka BP with additional 7 230Th dates and 573 stable isotope measurements on the lower part of that sample. The new record with a decadal resolution, piecing together with the previous data, provides a detailed, complete Last Glacial Maximum (LGM)/deglacial history of the EASM. Two centennial-scale weak monsoon events are detected within the analogue H1 event, and can be corre- lated to corresponding Greenland temperature shifts. This suggests a rapid re-organization of atmos- pheric and oceanic circulations during the ice-rafted debris (IRD) event in North Atlantic. A strength- ened EASM event spanning from 19.9 to 17.1 ka BP, firstly reported here, reaches on average a half of the monsoon intensity of B?lling warming with its peak close to the full level. Taking all available evi- dence from continental and oceanic sediments into consideration, we suggest that a forcing mecha- nism behind the event would be a positive feedback of the tropical Pacific Super-ENSO cycles in re- sponse to precessional changes in solar irradiation.

  8. Large-scale purification of the synthetic peptide fragment 163-171 of human interleukin-beta by multi-dimensional displacement chromatography.

    Science.gov (United States)

    Viscomi, G C; Cardinali, C; Longobardi, M G; Verdini, A S

    1991-07-19

    Multi-dimensional chromatography has been used successfully in the displacement mode for the purification of the synthetic peptide H-Val-Gln-Gly-Glu-Glu-Ser-Asn-Asp-Lys-OH, the fragment 163-171 of human interleukin-beta. This peptide can mimic several of the in vivo and in vitro immunostimulatory activities of the entire protein, except for the inflammatory effect. A large-scale procedure has been developed to purify the synthetic peptide by reversed-phase (RP) and ion-exchange (IE) displacement chromatography (DC) in a single run without any pretreatment. Masses from 100 mg to about 35 g of the unpurified compounds synthesized by a solid-phase technique on a Merrifield-type resin and obtained by acidolytic cleavage from the solid support, can be purified in this way. In the RP-DC mode the carrier and the displacer were aqueous solutions of 0.1% trifluoroacetic acid and 50 mM benzyltributylammonium chloride, respectively, whereas in the IE-DC mode the carrier was water and the displacer 50 mM ammonium citrate solution. RP-DC and IE-DC were also performed in series by directing the effluent of the RP column onto the IE column. Peptide purities and recoveries greater than 96 and 90%, respectively, were obtained.

  9. Amitriptyline improves motor function via enhanced neurotrophin signaling and mitochondrial functions in the murine N171-82Q Huntington disease model.

    Science.gov (United States)

    Cong, Wei-Na; Chadwick, Wayne; Wang, Rui; Daimon, Caitlin M; Cai, Huan; Amma, Jennifer; Wood, William H; Becker, Kevin G; Martin, Bronwen; Maudsley, Stuart

    2015-01-30

    Huntington disease (HD) is a neurodegenerative disorder characterized by progressive motor impairment and cognitive alterations. Hereditary HD is primarily caused by the expansion of a CAG trinucleotide repeat in the huntingtin (Htt) gene, which results in the production of mutant huntingtin protein (mHTT) with an expanded amino-terminal polyglutamine (poly(Q)) stretch. Besides pathological mHTT aggregation, reduced brain-derived neurotrophic factor (BDNF) levels, impaired neurotrophin signaling, and compromised mitochondrial functions also contribute to the deleterious progressive etiology of HD. As a well tolerated Food and Drug Administration-approved antidepressant, amitriptyline (AMI) has shown efficacy in treating neurodegenerative murine models via potentiation of BDNF levels and amelioration of alterations in neurotrophin signaling pathways. In this study, we observed profound improvements in the motor coordination of AMI-treated N171-82Q HD model mice. The beneficial effects of AMI treatment were associated with its ability to reduce mHTT aggregation, potentiation of the BDNF-TrkB signaling system, and support of mitochondrial integrity and functionality. Our study not only provides preclinical evidence for the therapeutic potency of AMI in treating HD, but it also represents an important example of the usefulness of additional pharmacogenomic profiling of pre-existing drugs for novel therapeutic effects with often intractable pathological scenarios. © 2015 by The American Society for Biochemistry and Molecular Biology, Inc.

  10. Regular cellular distribution of plasmids by oscillating and filament-forming ParA ATPase of plasmid pB171

    DEFF Research Database (Denmark)

    Ebersbach, Gitte; Ringgaard, Simon; Møller-Jensen, Jakob;

    2006-01-01

    with each other in a bacterial two-hybrid assay but do not interact with FtsZ, eight other essential cell division proteins or MreB actin. Based on these observations, we propose a simple model for how oscillating ParA filaments can mediate regular cellular distribution of plasmids. The model functions......Centromere-like loci from bacteria segregate plasmids to progeny cells before cell division. The ParA ATPase (a MinD homologue) of the par2 locus from plasmid pB171 forms oscillating helical structures over the nucleoid. Here we show that par2 distributes plasmid foci regularly along the length...... of the cell even in cells with many plasmids. In vitro, ParA binds ATP and ADP and has a cooperative ATPase activity. Moreover, ParA forms ATP-dependent filaments and cables, suggesting that ParA can provide the mechanical force for the observed regular distribution of plasmids. ParA and ParB interact...

  11. Regular Cellular Distribution of Plasmids by Oscillating and Filament-forming ParA ATPase of Plasmid pB171

    DEFF Research Database (Denmark)

    Ebersbach, Gitte; Ringgaard, Simon; Møller-Jensen, Jakob;

    2006-01-01

    with each other in a bacterial two-hybrid assay but do not interact with FtsZ, eight other essential cell division proteins or MreB actin. Based on these observations, we propose a simple model for how oscillating ParA filaments can mediate regular cellular distribution of plasmids. The model functions......Centromere-like loci from bacteria segregate plasmids to progeny cells before cell division. The ParA ATPase (a MinD homologue) of the par2 locus from plasmid pB171 forms oscillating helical structures over the nucleoid. Here we show that par2 distributes plasmid foci regularly along the length...... of the cell even in cells with many plasmids. In vitro, ParA binds ATP and ADP and has a cooperative ATPase activity. Moreover, ParA forms ATP-dependent filaments and cables, suggesting that ParA can provide the mechanical force for the observed regular distribution of plasmids. ParA and ParB interact...

  12. Mutation of Asp(171) and Asp(262) of the chemokine receptor CXCR4 impairs its coreceptor function for human immunodeficiency virus-1 entry and abrogates the antagonistic activity of AMD3100

    DEFF Research Database (Denmark)

    Hatse, S; Princen, K; Gerlach, L O

    2001-01-01

    by substitution of Asp(171) and/or Asp(262) by neutral asparagine residue(s). Both aspartates, but most particularly Asp(262), also proved essential for the anti-HIV-1 activity of AMD3100 against the viruses NL4.3, IIIB, and HE. In contrast, substitution of His(281) by a neutral alanine potentiated...... the antagonistic and antiviral effects of the compound in the different assay systems. Importantly, compared with the wild-type receptor, CXCR4[D262N] was much less effective, whereas CXCR4[D171N,D262N] completely failed as a coreceptor for infection by HIV-1 NL4.3. Thus, the negatively charged aspartate residues...

  13. Temporal expression of CD184(CXCR4) and CD171(L1CAM) identifies distinct early developmental stages of human retinal ganglion cells in embryonic stem cell derived retina.

    Science.gov (United States)

    Aparicio, J G; Hopp, H; Choi, A; Mandayam Comar, J; Liao, V C; Harutyunyan, N; Lee, T C

    2016-11-17

    Human retinal ganglion cells (RGCs) derived from pluripotent stem cells (PSCs) have anticipated value for human disease study, drug screening, and therapeutic applications; however, their full potential remains underdeveloped. To characterize RGCs in human embryonic stem cell (hESC) derived retinal organoids we examined RGC markers and surface antigen expression and made comparisons to human fetal retina. RGCs in both tissues exhibited CD184 and CD171 expression and distinct expression patterns of the RGC markers BRN3 and RBPMS. The retinal progenitor cells (RPCs) of retinal organoids expressed CD184, consistent with its expression in the neuroblastic layer in fetal retina. In retinal organoids CD184 expression was enhanced in RGC competent RPCs and high CD184 expression was retained on post-mitotic RGC precursors; CD171 was detected on maturing RGCs. The differential expression timing of CD184 and CD171 permits identification and enrichment of RGCs from retinal organoids at differing maturation states from committed progenitors to differentiating neurons. These observations will facilitate molecular characterization of PSC-derived RGCs during differentiation, critical knowledge for establishing the veracity of these in vitro produced cells. Furthermore, observations made in the retinal organoid model closely parallel those in human fetal retina further validating use of retinal organoid to model early retinal development.

  14. Multi-residue determination of 171 pesticides in cowpea using modified QuEChERS method with multi-walled carbon nanotubes as reversed-dispersive solid-phase extraction materials.

    Science.gov (United States)

    Han, Yongtao; Song, Le; Zou, Nan; Chen, Ronghua; Qin, Yuhong; Pan, Canping

    2016-09-15

    A rapid and sensitive method for the determination of 171 pesticides in cowpea was developed using multi-walled carbon nanotubes (MWCNTs) as reversed-dispersive solid-phase (r-DSPE) extraction materials. The clean-up performance of MWCNTs was proved to be obviously superior to PSA and GCB. This method was validated on cowpea spiked at 0.01 and 0.1mgkg(-1) with five replicates. The mean recoveries for 169 pesticides ranged from 74% to 129% with relative standard deviations (RSDs) (n=5) lower than 16.4%, except diflufenican and quizalofop-ethyl. Good linearity for all pesticides was obtained with the calibration curve coefficients (R(2)) larger than 0.9970. The limit of detection (LODs) and limit of quantification (LOQs) for the 171 pesticides ranged from 0.001 to 0.003mgkg(-1) and from 0.002 to 0.009mgkg(-1), respectively. The method was demonstrated to be reliable and sensitive for the routine monitoring of the 171 pesticides in cowpea samples.

  15. Clinics in diagnostic imaging (171)

    Science.gov (United States)

    Ooi, Su Kai Gideon; Tan, Tien Jin; Ngu, James Chi Yong

    2016-01-01

    A 46-year-old Chinese woman with a history of cholecystectomy and appendicectomy presented to the emergency department with symptoms of intestinal obstruction. Physical examination revealed central abdominal tenderness but no clinical features of peritonism. Plain radiography of the abdomen revealed a grossly distended large bowel loop with the long axis extending from the right lower abdomen toward the epigastrium, and an intraluminal air-fluid level. These findings were suspicious for an acute caecal volvulus, which was confirmed on subsequent contrast-enhanced computed tomography (CT) of the abdomen and pelvis. CT demonstrated an abnormal positional relationship between the superior mesenteric vein and artery, indicative of an underlying intestinal malrotation. This case highlights the utility of preoperative imaging in establishing the diagnosis of an uncommon cause of bowel obstruction. It also shows the importance of recognising the characteristic imaging features early, so as to ensure appropriate and expedient management, thus reducing patient morbidity arising from complications. PMID:27872936

  16. Gclust Server: 171 [Gclust Server

    Lifescience Database Archive (English)

    Full Text Available ter sequences Cluster Sequences Link to related sequences Related Sequences(352) Sequence length 100 Representative...hreshold 1.00e-08 Plants and algae (7species) (%) 85.71 Other Bikonts (Chromalveolata, Excavata) (9species)

  17. Dysprosium-free melt-spun permanent magnets.

    Science.gov (United States)

    Brown, D N; Wu, Z; He, F; Miller, D J; Herchenroeder, J W

    2014-02-12

    Melt-spun NdFeB powders can be formed into a number of different types of permanent magnet for a variety of applications in electronics, automotive and clean technology industries. The melt-spinning process produces flake powder with a fine uniform array of nanoscale Nd2Fe14B grains. These powders can be net-shape formed into isotropic polymer-bonded magnets or hot formed into fully dense magnets. This paper discusses the influence of heavy rare earth elements and microstructure on the magnetic performance, thermal stability and material cost of NdFeB magnets. Evidence indicates that melt-spun nanocrystalline NdFeB magnets are less dependent on heavy rare earth elements for high-temperature performance than the alternative coarser-grained sintered NdFeB magnets. In particular, hot-pressed melt-spun magnets are an attractive low-cost solution for applications that require thermal stability up to 175-200 °C.

  18. Structural and magnetic study of dysprosium substituted cobalt ferrite nanoparticles

    Energy Technology Data Exchange (ETDEWEB)

    Kumar, Hemaunt, E-mail: hvatsal@gmail.com [Department of Physics, Govind Ballabh Pant University of Agr. & Technology, Pantnagar, Uttarakhand 263145 (India); Srivastava, R.C. [Department of Physics, Govind Ballabh Pant University of Agr. & Technology, Pantnagar, Uttarakhand 263145 (India); Pal Singh, Jitendra [Advanced Analysis Centre, Korea Institute of Science and Technology, Seoul 02792 (Korea, Republic of); Negi, P. [Department of Physics, Govind Ballabh Pant University of Agr. & Technology, Pantnagar, Uttarakhand 263145 (India); Agrawal, H.M. [Advanced Analysis Centre, Korea Institute of Science and Technology, Seoul 02792 (Korea, Republic of); Das, D. [UGC-DAE CSR Kolkata Centre, Kolkata 700098 (India); Hwa Chae, Keun [Advanced Analysis Centre, Korea Institute of Science and Technology, Seoul 02792 (Korea, Republic of)

    2016-03-01

    The present work investigates the magnetic behavior of Dy{sup 3+} substituted cobalt ferrite nanoparticles. X-ray diffraction studies reveal presence of cubic spinel phases in these nanoparticles. Raman spectra of these nanoparticles show change in intensity of Raman bands, which reflects cation redistribution in cubic spinel lattice. Saturation magnetization and coercivity decrease with increase of Dy{sup 3+}concentration in these nanoparticles. Room temperature Mössbauer measurements show the cation redistribution in these nanoparticles and corroborates the results obtained from Raman Spectroscopic measurements. Decrease in magnetization of Dy{sup 3+} substituted cobalt ferrite is attributed to the reduction in the magnetic interaction and cation redistribution. - Highlights: • Slight decrease in crystallite size after Dy{sup 3+} doping. • Saturation magnetization and coercivity decrease after Dy{sup 3+} doping. • Mössbauer measurements show the cation redistribution in the samples.

  19. Dysprosium Acetylacetonato Single-Molecule Magnet Encapsulated in Carbon Nanotubes

    Directory of Open Access Journals (Sweden)

    Ryo Nakanishi

    2016-12-01

    Full Text Available Dy single-molecule magnets (SMMs, which have several potential uses in a variety of applications, such as quantum computing, were encapsulated in multi-walled carbon nanotubes (MWCNTs by using a capillary method. Encapsulation was confirmed by using transmission electron microscopy (TEM. In alternating current magnetic measurements, the magnetic susceptibilities of the Dy acetylacetonato complexes showed clear frequency dependence even inside the MWCNTs, meaning that this hybrid can be used as magnetic materials in devices.

  20. Microscopic study of neutron-rich dysprosium isotopes

    Energy Technology Data Exchange (ETDEWEB)

    Vargas, Carlos E. [Universidad Veracruzana, Facultad de Fisica e Inteligencia Artificial, Xalapa (Mexico); Universidad Nacional Autonoma de Mexico, Facultad de Ciencias, Apartado Postal 70-542, Mexico D.F. (Mexico); Velazquez, Victor [Universidad Nacional Autonoma de Mexico, Facultad de Ciencias, Apartado Postal 70-542, Mexico D.F. (Mexico); Lerma, Sergio [Universidad Veracruzana, Facultad de Fisica e Inteligencia Artificial, Xalapa (Mexico)

    2013-01-15

    Microscopic studies in heavy nuclei are very scarce due to large valence spaces involved. This computational problem can be avoided by means of the use of symmetry-based models. Ground-state, {gamma} and {beta} bands, and their B(E2) transition strengths in {sup 160-168}Dy isotopes, are studied in the framework of the pseudo-SU(3) model which includes the preserving symmetry Q . Q term and the symmetry-breaking Nilsson and pairing terms, systematically parametrized. Additionally, three rotor-like terms are considered, whose free parameters, fixed for all members of the chain, are used to fine tune the moment of inertia of rotational bands and the band head of {gamma} and {beta} bands. The model succesfully describes in a systematic way rotational features in these nuclei and allows to extrapolate toward the midshell nucleus {sup 170}Dy. The results presented show that it is possible to study a full chain of isotopes or isotones in the region with the present model. (orig.)

  1. Photodissociation spectroscopy of the dysprosium monochloride molecular ion

    CERN Document Server

    Dunning, Alexander; Showalter, Steven J; Puri, Prateek; Kotochigova, Svetlana; Hudson, Eric R

    2015-01-01

    We have performed a combined experimental and theoretical study of the photodissociation cross section of the molecular ion DyCl$^+$. The cross section for the photon energy range 35,500 cm$^{-1}$ to 47,500 cm$^{-1}$ is measured using an integrated ion trap and time-of-flight mass spectrometer, and we observe a broad, asymmetric profile that is peaked near 43,000 cm$^{-1}$. The theoretical cross section is determined from electronic potentials and transition dipole moments calculated using the relativistic configuration-interaction valence-bond and coupled-cluster methods. The electronic structure of DyCl$^+$ is unprecedentedly complex due to the presence of multiple open electronic shells, including 4f$^{10}$ orbitals. The molecule has nine attractive potentials with ionically-bonded electrons and 99 repulsive potentials dissociating to a ground state Dy$^+$ ion and Cl atom. We explain the lack of symmetry in the cross section as due to multiple contributions from one-electron-dominated transitions between t...

  2. FTIR and Electrical Study of Dysprosium Doped Cobalt Ferrite Nanoparticles

    Directory of Open Access Journals (Sweden)

    Hemaunt Kumar

    2014-01-01

    Full Text Available We have studied the role of Dy3+ doping on the XRD, TEM, FTIR, and dielectric and electrical properties of CoFe2O4 at room temperature. Cubic spinel phase of CoFe2−xDyxO4 (x = 0.00, 0.05, 0.10, and 0.15 was synthesized by using different sintering temperatures (300, 500, 700, and 900°C. The two absorption bands ν1 and ν2 are observed in Fourier transform infrared spectroscopy (FTIR spectra corresponding to the tetrahedral and octahedral sites, which show signature of spinel structure of the sample. For the sample sintered at 300°C, the dielectric constant is almost unchanged with the frequency at the particular concentrations of x = 0.00 and 0.05. Similar result is obtained for the sample sintered at 500°C (x = 0.10, 0.15, 700°C (x = 0.05, 0.10, and 0.15, and 900°C (x = 0.05, 0.10. An increase in the dielectric constant was observed for the undoped cobalt ferrite sintered at 500, 700, and 900°C. The values of electrical resistivity of the materials vary from ~105 to 109 Ω-cm.

  3. Adsorption of D113 Resin for Dysprosium(Ⅲ)

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    The adsorption behavior and mechanism of D113 resin for Dy(Ⅲ) was investigated by using the method of resin adsorption. Experimental results show that the optimum medium pH of adsorption of D113 resin for Dy3+ is pH=6.00 in the HAc-NaAc medium. The static adsorption capacity of D113 resin for Dy3+chemical analysis and IR spectra.

  4. 1300-nm gain obtained with dysprosium-doped chloride crystals

    Energy Technology Data Exchange (ETDEWEB)

    Page, R.H.; Schaffers, K.I.; Beach, R.J.; Payne, S.A.; Krupke, W.F.

    1996-03-01

    Dy{sup 3+} - doped chloride crystals have high 1300-nm emission quantum yields. Pump - probe experiments on La Cl{sub 3}:Dy{sup 3+} demonstrate optical gain consistent with predictions based on spectroscopic cross sections and lifetimes.

  5. Microscopic study of neutron-rich Dysprosium isotopes

    CERN Document Server

    Vargas, Carlos E; Lerma, Sergio; 10.1140/epja/i2013-13004-1

    2013-01-01

    Microscopic studies in heavy nuclei are very scarce due to large valence spaces involved. This computational problem can be avoided by means of the use of symmetry based models. Ground-state, gamma and beta-bands, and their B(E2) transition strengths in 160-168Dy isotopes, are studied in the framework of the pseudo-SU(3) model which includes the preserving symmetry Q.Q term and the symmetry-breaking Nilsson and pairing terms, systematically parametrized. Additionally, three rotor-like terms are considered whose free parameters, fixed for all members of the chain are used to fine tune the moment of inertia of rotational bands and the band-head of gamma and beta-bands. The model succesfully describes in a systematic way rotational features in these nuclei and allows to extrapolate toward the midshell nucleus 170Dy. The results presented show that it is possible to study full chain of isotopes or isotones in the region with the present model.

  6. Visible luminescence of dysprosium ions in oxyhalide lead borate glasses

    Science.gov (United States)

    Pisarska, Joanna; Żur, Lidia; Pisarski, Wojciech A.

    2011-08-01

    Visible luminescence of Dy 3+ ions in oxyhalide lead borate glasses was examined. Luminescence spectra show two intense bands at 480 nm and 573 nm due to 4F 9/2 → 6H 15/2 (blue) and 4F 9/2 → 6H 13/2 (yellow) transitions of Dy 3+. Luminescence decays from 4F 9/2 state and yellow-to-blue luminescence intensity ratios (Y/B) were analysed with PbX 2 (X = F, Cl) content. An introduction of PbX 2 to the borate glass results in the increasing of 4F 9/2 lifetime and the decreasing of yellow-to-blue luminescence intensity ratio, which is due to reduction of covalency between Dy 3+ and O 2-/X - ions.

  7. MAGNETIC FIELD INDUCED FIRST-ORDER TRANSITIONS IN DYSPROSIUM ORTHOFERRITE

    OpenAIRE

    Eremenko, V.; Gnatchenko, S.; Kharchenko, N.; Lebedev, P.; Piotrowski, K; Szymczak, H.; Szymczak, R.

    1988-01-01

    New type of magnetic first-order phase transition induced by external magnetic field applied in the ab-plane in DyFeO3 is investigated using different magnetooptic techniques. The phenomenological model of this transition is proposed. The phase diagram in H-T plane has been obtained for various H orientation in the ab-plane.

  8. Reflexiones sobre el Real Decreto español 171/2007, de 9 de febrero, por el que se regula la publicidad de los protocolos familiares en las sociedades familiares

    Directory of Open Access Journals (Sweden)

    María Angustias Díaz Gómez

    2011-06-01

    Full Text Available El objeto de este trabajo es analizar el Protocolo Familiar, estudiando su concepto, naturaleza jurídica y eficacia, su contenido, publicidad y desarrollo. El protocolo familiar es un instrumento jurídico que pretende organizar la relación entre la familia y la empresa, separando ambas realidades y, especialmente, trata de planificar adecuadamente la sucesión de la empresa familiar. Se trata de reflexionar sobre el Real Decreto español 171/2007, de 9 de febrero, por el que se regula la publicidad de los protocolos familiares en las Sociedades Familiares.The object of this work is to analyze the Family Protocol, studying his concept, juridical nature and effectiveness, his content, advertising and development. The family protocol is a legal instrument that, intends to organize the interaction between a family and their family-owned business, separating both realities and, specially, it tries to plan adequately the succession of the family business. It is a question of thinking about the Spanish Royal decree 171/2007, of February 9rd, by which there is regulated the advertising of the family protocols in the Familiar Companies.

  9. Real-time qPCR is a powerful assay to estimate the 171 R/Q alleles at the PrP locus directly in a flock's raw milk: a comparison with the targeted next-generation sequencing.

    Science.gov (United States)

    Feligini, Maria; Bongioni, Graziella; Brambati, Eva; Amadesi, Alessandra; Cambuli, Caterina; Panelli, Simona; Bonacina, Cesare; Galli, Andrea

    2014-10-01

    The hazard to human health represented by transmissible spongiform encephalopathies in sheep is one of the major reasons for implementing the genetic selection plan to break down prion diseases. The problem is particularly important because of the risk of disease transmission from ewe to lamb via milk or colostrum. In order to establish an active and convenient monitoring of the flocks already undergone genetic selection and thus, indirectly increase consumers' security, the challenge of the work was quantifying the classical scrapie risk in bulk milk. A new quantitative real-time PCR assay for the estimation of the 171 R and Q allelic frequencies in a DNA pool representative of all the lactating ewes present in a flock was optimized and validated "in field". The repeatability range was 3.69-5.27 for R and 4.20-5.75 for Q. The ruggedness of the allele frequencies resulted 4.26 for R and 4.77 for Q. Regarding the validation "in field", none of the considered sources of variability (flock, month, number of genotyped animals and somatic cell count) showed a significant effect on flock and milk at the linear model. The targeted next-generation sequencing was also tested to evaluate its applicability in this context. Results show that the real-time PCR assay could represent a valid tool for the determination of 171 R/Q allele frequencies in bulk milk. The implementation of a service for breeder self-control along the production chain would aim to increase the production of high-security dairy products, while monitoring over time of the effects of genetic selection in the flocks.

  10. Vurdering af konsekvenser for udpegningsgrundlaget for det internationale naturbeskyttelsesområde 171, Klinteskoven, ved forslag om etablering af horisontale lysåbninger i bøgeskoven på klinten øst for Geocenter Møn (Notat til Skov- og Naturstyrelsen)

    DEFF Research Database (Denmark)

    Wind, Peter

    2008-01-01

    Danmarks Miljøundersøgelser (DMU) har for Skov- og Naturstyrelsen, Storstrøm (SNS) udarbejdet en konsekvensvurdering af virkningen af et forslag om etablering af horisontale lysåbninger i habitatnaturtypen 9150, bøgeskov på kalk, der ligger i det internationale naturbeskyttelsesområde 171, Klinte...

  11. Surveys and suggestions of young and middle-aged patients with hypertension%171例中青年高血压患者健康知识调查分析

    Institute of Scientific and Technical Information of China (English)

    游桂英; 胡晓林; 方进博; 徐英; 杨晓玲

    2012-01-01

    目的 了解中青年高血压患者健康知识现状,并探讨对中青年高血压患者的健康教育方式和实施策略.方法 采用问卷方式,对171例中青年高血压患者的健康知识现状进行调查,并对结果进行统计分析.结果 在171例调查人群中,有110例患者饮食偏成,占64.33%;有129例患者偏好高脂高胆固醇饮食,占75.44%.有95例(55.56%)患者能够掌握常用高血压药物的治疗作用,但只有26例患者能遵医嘱服药,仅占15.2%.有114例患者不太注意活动锻炼,占66.67%.有155例患者与家庭朋友关系不太融洽,占90.64%;有140例患者不太注意不良情绪及影响,占81.87%.结论 调查结果显示,中青年高血压患者健康知识掌握不理想,因此应结合中青年高血压患者的特点进行有针对性的健康教育,以期形成健康的生活方式,提高遵医行为,促进血压的有效控制.%Objective To investigate the health knowledge of young and middle-aged patients with hypertension and make appropriate suggestions. Methods A questionnaire was designed to assess the health knowledge of young and middle-aged hypertensive patients and 171 cases were received the surveys. Results According to statistic analysis, the results was showed in four parts. Diet: there were 110 patients having the high-salt diet, accounting for 64. 33 percent; and 129 patients prefered high-triglycerides or high-cholesterol diet, accounting for 75. 44 percent. Treatment: although 95 patients could understand the therapeutic effect of common antihypertensives, accounting for 55. 56 percent; but only 26 patients could take the prescribed medication regularly, accounting for 15. 2 percent. Physical activity: 114 patients did not pay attention to health activities, accounting for 66. 67 percent. Social and psychological aspects: 155 patients had a disharmony relationship between family or friends, accounting for 90. 64 percent; and 140 patients did not pay attention

  12. 21 CFR 171.1 - Petitions.

    Science.gov (United States)

    2010-04-01

    ... Cosmetic Act (the act) shall be submitted in triplicate (quadruplicate, if intended uses include use in... Office of Food Additive Safety (HFS-200), Center for Food Safety and Applied Nutrition, Food and Drug... petition pursuant to section 409(b)(1) of the Federal Food, Drug, and Cosmetic Act with respect...

  13. 14 CFR 171.49 - Installation requirements.

    Science.gov (United States)

    2010-01-01

    ... facility will be required to have dual transmitting equipment with automatic changeover for localizer and... (including antennae), initially and periodically. (e) The facility must have, or be supplemented by... nearest FAA air traffic control or communications facility. Paragraphs (e)(1) and (e)(2) of this...

  14. 14 CFR 171.9 - Installation requirements.

    Science.gov (United States)

    2010-01-01

    ...) Dual transmitting equipment with automatic changeover is preferred and may be required to support... equipment, including the antenna, initially and periodically. (e) A facility intended for use as an... nearest FAA air traffic control or communication facility. Paragraphs (e) (1) and (2) of this section...

  15. 40 CFR 171.2 - Definitions.

    Science.gov (United States)

    2010-07-01

    ..., land, and all plants and man and other animals living therein, and the interrelationships which exist... other than trading of personal services between producers of agricultural commodities) on the...

  16. 22 CFR 171.12 - Processing requests.

    Science.gov (United States)

    2010-04-01

    ... accompanied by a written authorization for access by the individual, notarized or made under penalty of... individual; impair substantial due process rights; or harm substantial humanitarian interests. (2) The... between simple and more complex requests based on the amount of work and/or time needed to process...

  17. 7 CFR 17.1 - General.

    Science.gov (United States)

    2010-01-01

    ... the United States and have a person, principal, or agent on whom service of judicial process may be... assurances of repayment to CCC for the financing extended by CCC. (c) Purchase authorizations. This part covers, among other things, the issuance by the General Sales Manager of purchase authorizations...

  18. 76 FR 171 - Paper Clips From China

    Science.gov (United States)

    2011-01-03

    ... COMMISSION Paper Clips From China AGENCY: United States International Trade Commission. ACTION: Institution of a five-year review concerning the antidumping duty order on paper clips from China. SUMMARY: The... on paper clips from China would be likely to lead to continuation or recurrence of material...

  19. 34 CFR 668.171 - General.

    Science.gov (United States)

    2010-07-01

    ..., Primary Reserve, and Net Income ratios yield a composite score of at least 1.5, as provided under § 668.172 and appendices A and B to this subpart; (2) The institution has sufficient cash reserves to make required returns of unearned title IV HEA program funds, as provided under § 668.173; (3) The...

  20. 14 CFR 171.303 - Definitions.

    Science.gov (United States)

    2010-01-01

    ... fluctuations in the guidance which affect aircraft attitude, control surface motion, column motion, and wheel... information provided is not proportional to the angular displacement of the aircraft, but is a constant fly-left or fly-right indication of the direction relative to the approach course the aircraft should...

  1. 48 CFR 3009.171-9 - Clause.

    Science.gov (United States)

    2010-10-01

    ... ACQUISITION REGULATION (HSAR) ACQUISITION PLANNING CONTRACTOR QUALIFICATIONS Responsible Prospective... Service guard services contracts with business concerns owned, controlled, or operated by an individual...

  2. 49 CFR 171.7 - Reference material.

    Science.gov (United States)

    2010-10-01

    ... Examination of Metal Pipe and Tubing 178.45. American Water Works Association, 1010 Vermont Avenue, N.W... (CAN/CGSB 43.147—2005) Construction, Modification, Qualification, Maintenance, and Selection and Use of....417, 173.473 International Civil Aviation Organization (“ICAO”), 999 University Street, Montréal...

  3. 22 CFR 171.11 - Definitions.

    Science.gov (United States)

    2010-04-01

    ... Privacy Act, E.O. 12958, and the Ethics in Government Act; (e) Record means all information under the...) Representative of the news media means any person actively gathering news for an entity that is organized and... events or that would be of current interest to the public. News media include television or...

  4. 22 CFR 171.36 - Exemptions.

    Science.gov (United States)

    2010-04-01

    .... Information Access Programs Records. STATE-35. Intelligence and Research Records. STATE-15. International...-25. Passport Records. STATE-26. Personality Cross-Reference Index to the Secretariat Automated Data Index Records. STATE-28. Personality Index to the Central Foreign Policy Records. STATE-29....

  5. 10 CFR 171.11 - Exemptions.

    Science.gov (United States)

    2010-01-01

    ... avoidance of interest and penalty charges. If a partial or full exemption is granted, any overpayment will... following factors: (1) Age of the reactor; (2) Number of customers in rate base; (3) Net increase in KWh cost for each customer directly related to the annual fee assessed under this part; and (4) Any...

  6. 32 CFR 171.5 - Sale procedures.

    Science.gov (United States)

    2010-07-01

    ... DRMS' professional expertise and knowledge of the market. Advice regarding FMV shall be provided to.../or debarment, in addition to other administrative, contractual, civil, and criminal (including,...

  7. 4 MS 171-03 Omwega

    African Journals Online (AJOL)

    Damary

    2006-11-11

    Nov 11, 2006 ... Background: Mother- to- Child Transmission (MTCT) of HIV is a relatively new concept in rural ... and wet-nursing were the three feeding alternatives that were viable with ... Nutrition and Technology, Applied Nutrition Programme, University of Nairobi, P.O. ... About 30% of women going for antenatal care in.

  8. 45 CFR 17.1 - Definition.

    Science.gov (United States)

    2010-10-01

    ... DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA... Department or any principal operating component made to the news media inviting public attention to an action... affect persons or organizations identified therein. This part does not apply to nor is it affected by...

  9. 22 CFR 171.13 - Business information.

    Science.gov (United States)

    2010-04-01

    ... obtained by the Department from a submitter will be disclosed under the FOIA only in compliance with this... confidential under Exemption 4 of the FOIA. (2) Submitter means any person or entity from which the Department...) The Department determines that the information should not be disclosed; (2) The information lawfully...

  10. QTL Information Table: 171 [Q-TARO

    Lifescience Database Archive (English)

    Full Text Available Sh5-glum Morphological trait Panicle/flower seed shattering RFLP B)Fine F2 Taichung...l, and Yoshimura, A. (2002). Identification and mapping of seed shattering genes using introgression lines from wild rice species. Rice Genetics Newsletter 19, 78-80. ...

  11. 14 CFR 171.309 - General requirements.

    Science.gov (United States)

    2010-01-01

    ... and may be integrated in the same equipment. (6) At locations where a VHF marker beacon (75 MHz) is..., remote control and indicator equipment. (4) VHF marker beacon (75 MHz), associated monitor, remote... beacon components listed in paragraph (b)(4) of this section must comply with the minimum...

  12. 46 CFR 171.010 - Definitions.

    Science.gov (United States)

    2010-10-01

    ... passengers or vehicles, or both; (3) Operates on a short run on a frequent schedule between two points over... this chapter. (i) Machinery space means, unless otherwise prescribed by the Commandant for unusual... machinery. (2) Each space containing propulsion boilers. (3) Each space containing permanent coal...

  13. 40 CFR 61.171 - Definitions.

    Science.gov (United States)

    2010-07-01

    ... solution of copper and other metal sulfides produced by reduction of sinter product from the oxidation of... molten bath in the copper converter. Inorganic arsenic means the oxides and other noncarbon compounds...

  14. Corrigendum to "Global frequency and intensity analysis of the ν10 /ν7 /ν4 /ν12 band system of 12C2H4 at 10 μm using the D2 h top data system" [J. Quant. Spectrosc. Radiat. Transf. 182 (2016) 158-171

    Science.gov (United States)

    Alkadrou, A.; Bourgeois, M.-T.; Rotger, M.; Boudon, V.; Vander Auwera, J.

    2017-03-01

    This corrigendum provides a new version of one of the 3 supplementary data files associated with the article A. Alkadrou et al., J. Quant. Spectrosc. Radiat. Transf. 182 (2016) 158-171, namely the HITRAN-formatted linelist generated as described in section 5 of the article. Indeed, the Ka and Kc labels of the upper levels of a number of transitions belonging to the ν10, ν7 and ν4 bands listed in this supplementary data file were found to be incorrect. The linelist provided with this corrigendum corrects these erroneous assignments, and provides Ka and Kc labels for all the upper levels.

  15. Luminescence of divalent europium activated spinels synthesized by combustion and the enhanced afterglow by dysprosium incorporation

    Energy Technology Data Exchange (ETDEWEB)

    Wu, Haoyi, E-mail: manofchina@gmail.com; Jin, Yahong

    2016-05-01

    Herein we report a luminescent phenomenon of Eu{sup 2+} in the spinel MgAl{sub 2}O{sub 4} and ZnAl{sub 2}O{sub 4} samples which are successfully synthesized via a combustion method. The XRD shows cubic spinel structure is obtained from the prepared samples. The mean crystal sizes estimated from XRD data are 30 and 10 nm for MgAl{sub 2}O{sub 4} and ZnAl{sub 2}O{sub 4} respectively, and the large grain particles are the agglomeration of crystallites. The Eu{sup 2+} ions show a blue emission at around 480 nm and an afterglow phenomenon is observed after the removal of excitation. The afterglow spectrum of MgAl{sub 2}O{sub 4}: Eu{sup 2+}, Dy{sup 3+} shows two emissions at 480 and 520 nm while only one at 480 nm is observed in ZnAl{sub 2}O{sub 4}: Eu{sup 2+}, Dy{sup 3+}. The afterglow intensity and the persisting duration can be substantially enhanced by the Dy{sup 3+} incorporation because the trapping ability of the electron traps is reinforced. This is confirmed by the TL curves of the samples.

  16. Energy level decay and excited state absorption processes in dysprosium-doped fluoride glass

    Science.gov (United States)

    Gomes, Laércio; Librantz, André Felipe Henriques; Jackson, Stuart D.

    2010-03-01

    The primary excited state decay processes relating to the H613/2→H615/2˜3 μm laser transition in singly Dy3+-doped fluoride (ZBLAN) glass have been investigated in detail using time-resolved fluorescence spectroscopy. Selective laser excitation of the F69/2, H67/2 energy levels at 1125 nm and F611/2, H69/2 energy levels at 1358 nm established that the energy levels above the H611/2 level, excluding the F49/2 level, are entirely quenched by multiphonon emission in ZBLAN glass. The H611/2 and H613/2 energy levels emit luminescence with peaks at ˜1700 and ˜2880 nm, respectively, but at low quantum (luminescence) efficiencies. The quantum efficiency of the H611/2 level and H613/2 level is ˜9×10-5 and ˜1.3×10-2, respectively, for [Dy3+]=0.5 mol % based on calculations of the radiative lifetimes using the Judd-Ofelt theory. Excited state absorption (ESA) was detected by monitoring the rise time of the 1700 nm luminescence after tuning the probe wavelength across the spectral range from 1100 to 1400 nm. As a result of nonradiative decay of the higher excited states, ESA contributes to the heating of ˜3 μm fiber lasers based on Dy3+-doped fluoride glass. For [Dy3+] up to 4 mol %, we found no evidence of energy transfer processes between Dy3+ ions that influence the decay characteristics of the H611/2 and H613/2 energy levels.

  17. A naproxen complex of dysprosium intercalates into calf thymus DNA base pairs

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Mengsi; Jin, Jianhua; Xu, Guiqing [School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang 453007 (China); Cui, Fengling, E-mail: fenglingcui@hotmail.com [School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang 453007 (China); Luo, Hongxia [Department of Chemistry, Renmin University of China, Beijing 100872 (China)

    2014-01-15

    Highlights: • Binding mode to ctDNA was studied by various methods. • Intercalation is the most possible binding mode. • Dynamic and static quenching occurred simultaneously. • Hydrophobic force played a major role. • Binding characteristic of rare earth complexes to DNA are dependent on the element. - Abstract: The binding mode and mechanism of dysprosium–naproxen complex (Dy–NAP) with calf thymus deoxyribonucleic acid (ctDNA) were studied using UV–vis and fluorescence spectra in physiological buffer (pH 7.4). The results showed that more than one type of quenching process occurred and the binding mode between Dy–NAP with ctDNA might be intercalation. In addition, ionic strength, iodide quenching and fluorescence polarization experiments corroborated the intercalation binding mode between Dy–NAP and ctDNA. The calculated thermodynamic parameters ΔG, ΔH and ΔS at different temperature demonstrated that hydrophobic interaction force played a major role in the binding process.

  18. Connecting mononuclear dysprosium single-molecule magnets to form dinuclear complexes via in situ ligand oxidation.

    Science.gov (United States)

    Yutronkie, Nathan J; Kühne, Irina A; Korobkov, Ilia; Brusso, Jaclyn L; Murugesu, Muralee

    2016-01-14

    A Dy2 complex, exhibiting SMM behaviour, and its Y analogue were prepared via in situ oxidation of Py2TTA, a pincer type ligand, followed by dimerisation. This unique metal complexation and subsequent dimerization were followed by solution NMR studies.

  19. A Linear Tetranuclear Dysprosium(III) Compound Showing Single-Molecule Magnet Behavior

    Energy Technology Data Exchange (ETDEWEB)

    Ke, Hongshan; Xu, Gong Feng; Guo, Yun-Nan; Gamez, Patrick; Beavers, Christine M; Teat, Simon J; Tang, Jinkui

    2010-04-20

    Although magnetic measurements reveal a single-relaxation time for a linear tetranuclear Dy(III) compound, the wide distribution of the relaxation time observed clearly suggests the presence of two slightly different anisotropic centres, therefore opening new avenues for investigating the relaxation dynamics of lanthanide aggregates.

  20. A Novel (4,6)-Connected Net Based on Dysprosium Benzenedicarboxylate, [Dy(OAc)(BDC)]n

    Institute of Scientific and Technical Information of China (English)

    ZHANG Lei; LI Zhao-Ji; QIN Ye-Yan; CHENG Jian-Kai; YAO Yuan-Gen

    2008-01-01

    A new lanthanide coordination polymer, [Dy(OAc)(BDC)]n 1 (OAc= acetate, BDC = 1,4-benzenediacarboxylate), has been synthesized under hydrothermal conditions. Single-crystal X-ray diffraction analysis reveals that complex 1 has infinite zigzag Dy-OAc chains, which are further connected by BDC to form a 3D metal-organic framework. According to topology analysis, this framework can be characterized as (4,6)-connected (3.4.54)(32.4.56.66) net that has never been reported before. Crystal structure for 1: space group Pbca, a = 13.314(3), b = 8.0269(18), c = 20.275(5) A, V = 2166.8(9) A3, C10H7O6Dy, Mr= 385.66, Z = 8, Dc = 2.364 g/cm3, μ = 6.910 mm-1, F(000) = 1448, the final R = 0.0181 and wR = 0.0520.

  1. Photoluminescence and thermoluminescence properties of tricalcium phosphate phosphors doped with dysprosium and europium

    Indian Academy of Sciences (India)

    K Madhukumar; H K Varma; Manoj Komath; T S Elias; V Padmanabhan; C M K Nair

    2007-10-01

    The suitability of calcium phosphate crystals for thermoluminescence dosimetry (TLD) applications is investigated, owing to their equivalence to bone mineral. The and phases of tricalcium phosphate (TCP) were synthesized through wet precipitation and high temperature solid state routes and doped with Dy and Eu. The photoluminescence and thermoluminescence studies of the phosphors have been carried out. The TL properties were found to be highly dependent on the method of preparation of the material. Eu doping gave good PL emission, whereas Dy doping was more efficient in TL emission. -TCP was found to be less TL sensitive than -TCP, yet it was identified as a better phosphor material owing to its better fading characteristics. The dependence of TL of -TCP : Dy on the energy and dose of radiation, and on the doping concentration were studied. The TL intensity was observed to fade exponentially during a storage period of 20 days, but it stabilized at 70% of the initial value after 30 days. The optimum doping concentration was found to be 0.5 mol%.

  2. Extraction liquide-solide de Dysprosium(III) par le charbon actif ferromagnétique

    OpenAIRE

    khiri, khaira

    2014-01-01

    L’extraction liquide-solide de Dy(III) a été faite par le charbon actif ferromagnétique, dans un milieu nitré. L’effet de pH initial, concentration initial en ion Dy(III), le temps de contact, la force ionique, la température, la masse et l’élution ont été étudiés. La capacité de sorption augmente avec l’augmentation de la concentration initiale en Dy(III), le pH et la température. L’isotherme de Freundlich décrit mieux le processus d’extraction, ainsi que le modèle cinétique de p...

  3. Geometric and electronic structure of dysprosium thin films on tungsten surfaces Structural and magnetic properties

    CERN Document Server

    Moslemzadeh, N

    2001-01-01

    The rare earth thin films are frequently the focus of investigators due to their unusual structural and magnetic properties. Despite the potential interest of Dy/W systems to the surface/rare earth community, they have been little studied. This study is the first try of growing Dy on W(100) and W(112) and W(110) in which almost a complete set of information about film morphology and electronic structure of the surface and interface have been achieved. A set of different experiments have been done for this purpose including LEED, XPS, UPS (with synchrotron radiation) and STM. The growth modes of Dy on different W substrates (W(100), W(112) and W(110)) at RT and at elevated temperatures have been determined by XPS of Dy 3d sub 3 sub / sub 2 and W 4f intensities. Crystallographic ordering and the epitaxial relationship between adsorbate Dy and different W substrates have been studied with LEED and the effect of annealing temperature on the resultant superstructures was investigated. As a complementary study to t...

  4. Cerium: an unlikely replacement of dysprosium in high performance Nd-Fe-B permanent magnets.

    Science.gov (United States)

    Pathak, Arjun K; Khan, Mahmud; Gschneidner, Karl A; McCallum, Ralph W; Zhou, Lin; Sun, Kewei; Dennis, Kevin W; Zhou, Chen; Pinkerton, Frederick E; Kramer, Matthew J; Pecharsky, Vitalij K

    2015-04-24

    Replacement of Dy and substitution of Nd in NdFeB-based permanent magnets by Ce, the most abundant and lowest cost rare earth element, is important because Dy and Nd are costly and critical rare earth elements. The Ce, Co co-doped alloys have excellent high-temperature magnetic properties with an intrinsic coercivity being the highest known for T ≥ 453 K.

  5. Studies on Preparation of Dysprosium - 165 Metallic Macroaggregates for the Treatment of Rheumatoid Arthritis

    Energy Technology Data Exchange (ETDEWEB)

    Park, Kyung Bae; Kim, Jae Rok [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    1994-07-15

    Irradiation of 20 mg of natural Dy(NO{sub 3})3 in a neutron flux of 2 X10{sup 13} n/cm{sup 2} sec for 4 hours gave 5.76 Ci of {sup 165}Dy (specific activity, 610 mCi/mg Dy) with high radionuclidic purity (>99.9%). {sup 165}Dy-MA was prepared in a quantitative yield by reacting the aqueous solution of {sup 165}Dy(NO{sub 3})3 with sodium borohydride solution in 0.2N NaOH. Coulter particle analyzer exhibited mean particle size of 2.6 mum (range 1 approx 6 mum). Even though the {sup 165}Dy-MA suspension in saline was stored at 37 .deg. C for 24 hours of autoclaved at 121 .deg. C for 30 minutes, there was no significant change in particle size and leakage problem indicating the prepared {sup 165}Dy-MA is sufficiently stable. In-vivo retention studies were carried out by administering {sup 165}Dy-MA into the knee joint space of normal rabbits. Gamma camera analysis showed high retention in joint space of normal rabbits. Gamma camera analysis showed high retention in joining space even at 24 hours after administration (>99.9%) The ease with which the{sup 165}Dy-MA can be made in the narrow size range and their high in vitro and vivo stability make them attractive agents for radiation synovectomy.

  6. Dysprosium sorption by polymeric composite bead: robust parametric optimization using Taguchi method.

    Science.gov (United States)

    Yadav, Kartikey K; Dasgupta, Kinshuk; Singh, Dhruva K; Varshney, Lalit; Singh, Harvinderpal

    2015-03-06

    Polyethersulfone-based beads encapsulating di-2-ethylhexyl phosphoric acid have been synthesized and evaluated for the recovery of rare earth values from the aqueous media. Percentage recovery and the sorption behavior of Dy(III) have been investigated under wide range of experimental parameters using these beads. Taguchi method utilizing L-18 orthogonal array has been adopted to identify the most influential process parameters responsible for higher degree of recovery with enhanced sorption of Dy(III) from chloride medium. Analysis of variance indicated that the feed concentration of Dy(III) is the most influential factor for equilibrium sorption capacity, whereas aqueous phase acidity influences the percentage recovery most. The presence of polyvinyl alcohol and multiwalled carbon nanotube modified the internal structure of the composite beads and resulted in uniform distribution of organic extractant inside polymeric matrix. The experiment performed under optimum process conditions as predicted by Taguchi method resulted in enhanced Dy(III) recovery and sorption capacity by polymeric beads with minimum standard deviation.

  7. Dysprosium(III)-diethylenetriaminepentaacetate complexes of aminocyclodextrins as chiral NMR shift reagents.

    Science.gov (United States)

    Wenzel, T J; Miles, R D; Zomlefer, K; Frederique, D E; Roan, M A; Troughton, J S; Pond, B V; Colby, A L

    2000-01-01

    A metal chelating ligand is bonded to alpha-, beta-, and gamma-cyclodextrin by the reaction of diethylenetraminepentaacetic dianhydride with the corresponding 6-mono- and 2-mono(amine)cyclodextrin. Adding Dy(III) to the cyclodextrin derivatives causes shifts in the (1)H-NMR spectra of substrates such as propranolol, tryptophan, aspartame, carbinoxamine, pheniramine, doxylamine, and 1-anilino-8-naphthalenesulfonate. The Dy(III)-induced shifts enhance the enantiomeric resolution in the NMR spectra of several substrates. Enhancements in enantiomeric resolution using cyclodextrin derivatives with the amine tether are compared to previously described compounds in which the chelating ligand is attached through an ethylenediamine tether. In general, the Dy(III) complex of the 6-beta-derivative with the amine tether is a more effective chiral resolving agent than the complex with the ethylenediamine tether. The opposite trend is observed with the 2-beta-derivatives. The presence of the chelating ligand in the 2-beta-derivative hinders certain substrates from entering the cavity. For cationic substrates, evidence suggests that a cooperative association involving inclusion in the cavity and association with the Dy(III) unit occurs. Enhancements in enantiomeric resolution in the spectrum of tryptophan are greater for the secondary alpha- and gamma-derivatives than the beta-derivative.

  8. The Separation of Dysprosium and Holmium for Production of n.c.a. Ho-166

    Energy Technology Data Exchange (ETDEWEB)

    Choi, K. H.; Kim, J. B.; Park, U. J.; Nam, S. S.; Jang, K. D.; Yoo, K. M. [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2015-10-15

    The uses of radiolanthanide series are increasing in these days because of target therapy which does not require surgery. Certain radiolanthanides is very useful since they have the ability of simultaneous diagnosis and therapeutic effect in nuclear medicine. But this conventional therapeutic method has often limited by specific activity which is important things to affect labeling yield such as radiommunoconjugation and peptide labeling. There are two approaches to produce radiolanthanide in nuclear reactor. One is direct method using (n, γ) reaction and the other is indirect method using (n, γ)β reaction. Among the radiolanthanides, Ho-166 can be produced with two methods. Some radiolanthanides show the good theranostic effect in that they have proper LET (Linear Energy Transfer) to induce apoptosis for cancer treatment and gamma ray to use as a tracer for cancer diagnosis. The aim of this project based on this view is to get the carrier free radioisotopes for applying the nuclear medicine.

  9. Thermal expansion in dysprosium tungstate Dy10W2O21

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The complex oxide Dy10W2O21 was synthesized by a solid-state reaction and isolated in cubic symmetry by an X-ray diffractometry (XRD) method. Differential scanning calorimetry (DSC) measurements show that the compound is thermodynamically stable. The intrinsic thermal expansion coefficients were determined by extra-power powder Xray diffractometry from room temperature to 1000 ℃: linear coefficient α = 1.07 × 10-5 ℃-1 and bulk coefficient β=3.20 × 10-5℃-1. Dilatometry was used to measure the extrinsic thermal expansion coefficient (9.2 × 10-6℃-1).

  10. Magnetic Properties of Some Gadolinium, Erbium, Dysprosium, Manganese Substituted Samarium-2 Cobalt-17 Intermetallic Compounds.

    Science.gov (United States)

    1979-08-01

    S K AREA B WORK UNIT NUMBERSElect ronic Materials Research Division 61102AUS Army Electronics Technology & Devices Laborator) 1-rrr~ -rrd2An47 02 031...permanent magnet materials having intrinsically temperature compensated magneti- zations. The properties investigated were saturation magnetization...that excellent temperature compensation could be achieved in these compounds in the teinper~ture (cont’d) ~‘ DD I ? ) 1Q3 L°’TI°M °’ INOV BI

  11. Recycling of waste Nd-Fe-B sintered magnets by doping with dysprosium hydride nanoparticles

    Institute of Scientific and Technical Information of China (English)

    刘卫强; 李超; ZAKOTNIK Miha; 岳明; 张东涛; 黄秀莲

    2015-01-01

    Recycling of waste sintered Nd-Fe-B permanent magnets by doping DyH3 nanoparticles was investigated. The effect of the DyH3 nanoparticles on the microstructure and magnetic properties of the recycled magnets was studied. As the DyH3 nanoparticles additive increased, the coercivity of recycled magnet increased gradually. The recycled magnets with DyH3 nanoparticle content be-tween 0.0 wt.% and 1.0 wt.% maintained the remanence (Br), but, with higher additions, theBr began to decrease rapidly. The best recycled magnet produced contained 1.0 wt.% of DyH3 nanoparticles when compared to the properties of the starting waste sintering magnet. TheHcj,Br and (BH)max values of 101.7%, 95.4%, and 88.58%, respectively, were recovered.

  12. Photo and cathodoluminescence characteristics of dysprosium doped yttrium oxide nanoparticles prepared by Polyol method

    Energy Technology Data Exchange (ETDEWEB)

    Balderas-Xicohténcatl, R., E-mail: rbalderas@fis.cinvestav.mx [Centro de Investigación y de Estudios Avanzados-IPN, Departamento de Física, Apdo, Postal 14-470, Del. Gustavo A. Madero, C.P. 07360, México, D.F. (Mexico); Martínez-Martínez, R. [Instituto de Física y Matemáticas, Universidad Tecnológica de la Mixteca, Carretera a Acatlima Km. 2.5, Huajuapan de León, Oaxaca 69000 (Mexico); Rivera-Alvarez, Z.; Santoyo-Salazar, J.; Falcony, C. [Centro de Investigación y de Estudios Avanzados-IPN, Departamento de Física, Apdo, Postal 14-470, Del. Gustavo A. Madero, C.P. 07360, México, D.F. (Mexico)

    2014-02-15

    The luminescent characteristics of Dy{sup 3+}-doped Y{sub 2}O{sub 3} nanopowders synthesized using the polyol method are reported. The Y{sub 2}O{sub 3} nanoparticles presented a cubic phase crystalline structure of Y{sub 2}O{sub 3} after an annealing treatment in oxygen ambient at temperatures above 600 °C. The averaged crystallite size determined from the X-ray diffraction peaks width was in the 20–32 nm range depending on the annealing temperature. Scanning and transmission electron microscopy studies indicate the formation of nanoparticle aggregates up to 175 nm in diameter. Photoluminescence and cathodoluminescence measurements show a predominant emission at 573 nm, which is attributed to the {sup 4}F{sub 9/2}→{sup 6}H{sub 13/2} of the Dy{sup 3+} ion. The luminescence emission dependence with the dopant concentration and post-annealing temperatures is discussed. -- Highlights: • Nanoparticles of Y{sub 2}O{sub 3}:Dy{sup 3+} have been successfully synthesized by the polyol method. • XRD shows a grain size from 20 to 32 nm which is in agreement with SEM and TEM. • Electronic micrographs indicate the formation agglomerates of ∼175 nm. • The method used in the synthesis is industrial scalable and a low cost. • CL emission is observed at naked eye.

  13. Report on INT Program INT-17-1a

    Energy Technology Data Exchange (ETDEWEB)

    Escher, J. E. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Blackmon, J. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Elster, C. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Launey, K. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Lee, D. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Scielzo, N. D. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2017-04-19

    The purpose of the 5-week program was to bring together physicists from the low-energy nuclear structure and reaction communities to identify avenues for achieving reliable and predictive descriptions of reactions involving nuclei across the isotopic chart. The 4-day embedded workshop focused on connecting theory developments to experimental advances and data needs for astrophysics and other applications.

  14. 50 CFR 17.1 - Purpose of regulations.

    Science.gov (United States)

    2010-10-01

    ... Convention on International Trade in Endangered Species of Wild Fauna and Flora, for which regulations are....1 Purpose of regulations. (a) The regulations in this part implement the Endangered Species Act of... also carry over the species and subspecies of wildlife designated as endangered under the......

  15. 48 CFR 3009.171-5 - Serious felonies prohibiting award.

    Science.gov (United States)

    2010-10-01

    ... ethics of the business concern; or are of a nature that is inconsistent with the mission of FPS... the integrity or business ethics of the business concern; or is of a nature that is inconsistent with... convictions will prohibit a business concern from being awarded a contract for FPS guard services. Serious...

  16. 1935 15' Quad #171 Aerial Photo Mosaic Index

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — Aerial Photo Reference Mosaics contain aerial photographs that are retrievable on a frame by frame basis. The inventory contains imagery from various sources that...

  17. 7 CFR 457.171 - Cabbage crop insurance provisions.

    Science.gov (United States)

    2010-01-01

    ... irrigation water supply, if caused by a cause of loss specified in sections 10(a)(1) through (6) that occurs... percentage relationship to the maximum price election offered by us for each type. For example, if you...

  18. 14 CFR 171.265 - Glide path performance requirements.

    Science.gov (United States)

    2010-01-01

    ... procedures or to overcome an obstruction clearance problem, only in accordance with the criteria specified in... the length of time the carrier is radiated during each beam illumination interval. (k) The...

  19. 44 CFR 206.171 - Crisis counseling assistance and training.

    Science.gov (United States)

    2010-10-01

    ..., psychological, and social problems observed, the types of mental health problems encountered by victims, and a... should be provided to help preclude possible damaging physical or psychological effects. (3) Crisis... ameliorate the mental and emotional crises and their subsequent psychological and behavioral conditions...

  20. Dicty_cDB: VSE171 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available ignificant alignments: (bits) Value N D37981 |D37981.1 Dictyostelium discoidium D...DCOF2 gene for cofilin, complete cds. 829 0.0 2 D37980 |D37980.1 Dictyostelium discoidium DDCOF1 gene for co

  1. 28 CFR 0.171 - Judgments, fines, penalties, and forfeitures.

    Science.gov (United States)

    2010-07-01

    ... OF JUSTICE Authority To Compromise and Close Civil Claims and Responsibility for Judgments, Fines... that the division will assume such enforcement responsibilities. (b) Each U.S. Attorney shall designate... section that such division will assume responsibility for enforcement of a criminal monetary penalty,...

  2. 14 CFR 171.3 - Requests for IFR procedure.

    Science.gov (United States)

    2010-01-01

    ... proposed procedure for operating the facility. (3) A proposed maintenance organization and maintenance... this subpart. (5) A showing that the facility has an acceptable level of operational reliability and an... required changes in the facility or the maintenance manual or maintenance organization. The owner must then...

  3. Road Materials and Pavement Design Volume 17(1)

    CSIR Research Space (South Africa)

    De Beer, Morris

    2016-03-01

    Full Text Available Andrew Charles COLLOP - De Montfort University, Leicester, UK William G. BUTTLAR - University of Missouri, Urbana-Champaign, USA Editor-in-Chief at Large Jorge B. Sousa - Consulpav, Oeiras, Portugal Associate Editors Morris de Beer - CSIR Built..., Stockholm, Sweden Mihai O. Marasteanu - University of Minnesota, Minneapolis, USA Manfred N. Partl - EMPA, Dübendorf, Switzerland Gabriele Tebaldi - University of Parma, Italy Michael P. Wistuba - Technische Universität Braunschweig, Germany ...

  4. 26 CFR 1.171-2 - Amortization of bond premium.

    Science.gov (United States)

    2010-04-01

    ... year. A uses the cash receipts and disbursements method of accounting, and A decides to use annual... payments of interest of $9,000, payable on January 15 of each year. C uses the cash receipts...

  5. Dicty_cDB: SHB171 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available ame: Full=Diaphanous-relate... 103 1e-20 (Q0GNC1) RecName: Full=Inverted formin-2; &DQ834374_1(DQ834374|... ... |pid:none) human full-length cDNA 5-PRIME end... 95 5e-18 (Q27J81) RecName: Full=Inverted... formin-2; AltName: Full=HBEBP2-b... 95 5e-18 (Q6NTV6) RecName: Full=Inverted formin-2; &BC068848_1

  6. 14 CFR 171.259 - Performance requirements: General.

    Science.gov (United States)

    2010-01-01

    .../240 volt, 60 Hz, 3-wire single phase AC power source. (c) ISMLS ground equipment must meet the following service conditions: (1) AC line parameters, DC voltage, elevation, and duty: 120 V nominal value... V (±0.2 V).* AC line frequency (60 Hz), 57 Hz to 63 Hz (±0.2 Hz).* DC voltage (48 V), 44 V to 52...

  7. 21 CFR 133.171 - Pasteurized process pimento cheese.

    Science.gov (United States)

    2010-04-01

    ... solids is not less than 49 percent. (b) The cheese ingredient is cheddar cheese, washed curd cheese... purposes of this section, cheddar cheese for manufacturing, washed curd cheese for manufacturing, colby..., washed curd cheese, colby cheese, and granular cheese, respectively. (d) The only fruit, vegetable,...

  8. 171 Adoption of Enriched Local Complementary Food in Osun State ...

    African Journals Online (AJOL)

    User

    2012-01-24

    Jan 24, 2012 ... State: Combating Micronutrient Deficiency in the First Two. Years of Life ... three micronutrients; iodine, iron and vitamin A are widespread affecting more than ..... and children at risk Nestle Nutrition Workshop series Pediatric. Program ... Ogunba B.O and Adeyefa,I. (2002) Factor influencing mother choice of.

  9. 49 CFR 171.8 - Definitions and abbreviations.

    Science.gov (United States)

    2010-10-01

    ... requirements: (1) Has an engineering degree and one year of work experience in cargo tank structural or... railroad signalman; or (iv) A railroad maintenance-of-way employee. (2) This term includes an individual... Atomic Energy Agency. IATA means International Air Transport Association. ICAO means International Civil...

  10. 26 CFR 1.171-1 - Bond premium.

    Science.gov (United States)

    2010-04-01

    ... interest—(i) Facts. PR is a partner in partnership PRS. PRS does not have any unrealized receivables or inventory items as defined in section 751. On January 1, 1998, PRS distributes to PR a taxable bond,...

  11. Dicty_cDB: SHG171 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available T10I14 (ESSA project). 38 2.4 2 DN191182 |DN191182.1 ACL5_13E12 AcL5 cDNA Library Angiostrongylus cantonens...is cDNA, mRNA sequence. 44 3.7 1 DN190596 |DN190596.1 ACL5_06E22 AcL5 cDNA Library Angiostrongylus canto

  12. Dicty_cDB: SSD171 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available equence. 48 0.13 1 BQ866265 |BQ866265.1 QGC7H23.yg.ab1 QG_ABCDI lettuce salinas L...actuca sativa cDNA clone QGC7H23, mRNA sequence. 48 0.13 1 BQ862631 |BQ862631.1 QGC21K01.yg.ab1 QG_ABCDI lettuce salinas

  13. Dicty_cDB: SFH171 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available |AW626316.1 EST320223 tomato radicle, 5 d post-imbibition, Cornell University Lycopersicon esculentum cDNA c...82264 |AI782264.1 EST263143 tomato susceptible, Cornell Lycopersicon esculentum cDNA clone cLES18L5, mRNA se

  14. Dicty_cDB: CHJ171 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available KKFKEEKNLQFKW--- ---fslyriskywkkicl****ikrcfksrsrllgngit*kfnl*rw*rfrnscn**ixn *ct...SEIGFLEQWWDDMPIEIKNDFIKHV KNDRIEFVNGGWVMNDEACASLESVIRQLSNGHKFIREKFGKQPESGWQIDPFGHSSLTP TLQAQFGYKHVVLNRIHYELK

  15. Dicty_cDB: AFJ171 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available clone:MFE16. 32 0.46 5 AB164452 |AB164452.1 Asphondylia diervillae mitochondrial gene for 12S ribosomal RNA..., partial sequence, isolate: WeiFukInu62. 34 0.46 2 AB164451 |AB164451.1 Asphondylia diervilla

  16. 49 CFR 192.171 - Compressor stations: Additional safety equipment.

    Science.gov (United States)

    2010-10-01

    ... event of inadequate cooling or lubrication of the unit. (d) Each compressor station gas engine that... compressor station must have vent slots or holes in the baffles of each compartment to prevent gas from being... 49 Transportation 3 2010-10-01 2010-10-01 false Compressor stations: Additional safety equipment...

  17. 49 CFR 171.12 - North American Shipments.

    Science.gov (United States)

    2010-10-01

    ... are met. In addition, a cargo tank motor vehicle, portable tank or rail tank car authorized by the... provided the cargo tank motor vehicle, portable tank or rail tank car conforms to the applicable... packagings. A portable tank, cargo tank motor vehicle or rail tank car equivalent to a corresponding...

  18. 49 CFR 173.171 - Smokeless powder for small arms.

    Science.gov (United States)

    2010-10-01

    ...) net mass in: (1) One rail car, motor vehicle, or cargo-only aircraft; or (2) One freight container on... classed in Division 1.3 may be reclassed in Division 4.1, for domestic transportation by motor vehicle, rail car, vessel, or cargo-only aircraft, subject to the following conditions: (a) The powder must...

  19. 46 CFR 108.171 - Class I, Division 1 locations.

    Science.gov (United States)

    2010-10-01

    ... Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN... the mud circulating system that has an opening into the space and is between the well and final degassing discharge. (b) An enclosed or semi-enclosed location that is below the drill floor, and contains...

  20. 14 CFR 171.25 - Minimum requirements for approval.

    Science.gov (United States)

    2010-01-01

    ... (CONTINUED) NAVIGATIONAL FACILITIES NON-FEDERAL NAVIGATION FACILITIES Nondirectional Radio Beacon Facilities... met before the FAA will approve an IFR procedure for a non-Federal, nondirectional radio...

  1. 21 CFR 145.171 - Artificially sweetened canned peaches.

    Science.gov (United States)

    2010-04-01

    ... thickened with pectin and may contain any mixture of any edible organic salt or salts and any edible organic... used, as prescribed for canned peaches by § 145.170(a). If the packing medium is thickened with pectin, the label shall bear the statement “thickened with pectin”. When any organic salt or acid or...

  2. Practice Bulletin No. 171: Management of Preterm Labor.

    Science.gov (United States)

    2016-10-01

    Preterm birth is the leading cause of neonatal mortality and the most common reason for antenatal hospitalization . In the United States, approximately 12% of all live births occur before term, and preterm labor preceded approximately 50% of these preterm births . Although the causes of preterm labor are not well understood, the burden of preterm births is clear-preterm births account for approximately 70% of neonatal deaths and 36% of infant deaths as well as 25-50% of cases of long-term neurologic impairment in children . A 2006 report from the Institute of Medicine estimated the annual cost of preterm birth in the United States to be $26.2 billion or more than $51,000 per premature infant . However, identifying women who will give birth preterm is an inexact process. The purpose of this document is to present the various methods proposed to manage preterm labor and to review the evidence for the roles of these methods in clinical practice. Identification and management of risk factors for preterm labor are not addressed in this document.

  3. 49 CFR 171.16 - Detailed hazardous materials incident reports.

    Science.gov (United States)

    2010-10-01

    ... at the reporting person's principal place of business. If the written or electronic Hazardous... Safety Administration, Department of Transportation, Washington, DC 20590-0001, or an electronic... incident involving transportation by aircraft, submit a written or electronic copy of the...

  4. 171 inventory of some environmental components in the terrestrial ...

    African Journals Online (AJOL)

    2010-09-02

    Sep 2, 2010 ... Integrated Waste Treatment Facility in Makurdi was carried out to obtain baseline information on the area. ... The microbial status of the water indicated that. 5 ..... Botanical nam e .... The results of the study present the status of.

  5. Dicty_cDB: VHD171 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available t A mRNA, partial cds. 460 0.0 2 AB093510 |AB093510.1 Saccharomyces exiguus VMA1-2 gene for vacuolar membran...e ATPase subunit a precursor 2, partial cds, strain:IFO1128. 80 4e-41 7 AB093509 |AB093509.1 Saccharomyces exiguus

  6. 46 CFR 67.171 - Deletion; requirement and procedure.

    Science.gov (United States)

    2010-10-01

    ... when: (1) The vessel is placed under foreign flag; (2) The vessel is sold or transferred in whole or in... placed under foreign flag or has been sold or transferred in whole or in part to a non-citizen of the... section, and file: (1) Evidence of the sale or transfer, if any; and (2) Evidence that the...

  7. 40 CFR 17.1 - Purpose of these rules.

    Science.gov (United States)

    2010-07-01

    ... special circumstances make an award unjust. The purpose of these rules is to establish procedures for the submission and consideration of applications for awards against EPA when the underlying decision is...

  8. 14 CFR 171.261 - Localizer performance requirements.

    Science.gov (United States)

    2010-01-01

    ... (CONTINUED) NAVIGATIONAL FACILITIES NON-FEDERAL NAVIGATION FACILITIES Interim Standard Microwave Landing... frangible mounts or beyond the 1000′ light bar. (b) On runways where limited terrain prevents the localizer... runway centerline at the ISMLS reference datum. (q) The nominal displacement sensitivity within the half...

  9. Dicty_cDB: VHL171 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available *yqligkkkkkkkc*f*lkhql*hfhwilkfqipcqyyitrlqreqkikainfny tllvmfyqisyqkqlehvvlkksqq...nlsalctstiifi gwnirilfknatksn*in*kinkfeiiinfiiiiiilylm*syktkk*tkxkk Frame C: llayw*yqligkkkkkkkc*f*lkhql*hfhwilkfqipcqyyitrlqreqkikai

  10. 14 CFR 171.313 - Azimuth performance requirements.

    Science.gov (United States)

    2010-01-01

    ... degree. From the approach reference datum to the coverage limit, the PFE, PFN and CMN limits, expressed... runway centerline extended, by a factor of 1.2 for the PFE and PFN limits and to ±0.10 degree for the CMN... degree azimuth angles for the PFE, PFN and CMN limits. (iii) With elevation angle from +9 degrees to +15...

  11. 14 CFR 171.317 - Approach elevation performance requirements.

    Science.gov (United States)

    2010-01-01

    ... limit, the PFE, PFN and CMN limits shall be allowed to linearly increase as follows: (i) With distance along the runway centerline extended at the minimum glide path angle, by a factor of 1.2 for the PFE and... extended to the coverage extreme, by a factor of 1.2 for the PFE and PFN limits and by a factor of 2.0 for...

  12. 14 CFR 171.273 - Maintenance and operations requirements.

    Science.gov (United States)

    2010-01-01

    ... beacon power, and modulation. (18) The following information concerning the ISMLS facility: (i) Facility... emission and frequencies of the ISMLS localizer, glide path, beacon markers, and associated compass... marker beacon radiation characteristics must be conducted in accordance with the maintenance...

  13. 14 CFR 171.325 - Maintenance and operations requirements.

    Science.gov (United States)

    2010-01-01

    ... availability of a sufficient stock of spare parts, including solid state components, or modules to make... TRANSPORTATION (CONTINUED) NAVIGATIONAL FACILITIES NON-FEDERAL NAVIGATION FACILITIES Microwave Landing System... States personnel. (12) Names, addresses, and telephone numbers of persons to be notified in an...

  14. 14 CFR 171.323 - Fabrication and installation requirements.

    Science.gov (United States)

    2010-01-01

    ... utilize solid state technology except that traveling wave tube amplifiers (TWTA) may be used. A maximum... TRANSPORTATION (CONTINUED) NAVIGATIONAL FACILITIES NON-FEDERAL NAVIGATION FACILITIES Microwave Landing System... applied, the state of the battery charge must not affect the operation of the MLS ground station....

  15. Dicty_cDB: CHM171 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available 6 CSU-K33r Aedes aegypti genomic clone CSU-K33r.25G4, DNA sequence. 50 0.059 1 CX053834 |CX053834.1 UCRCS09_8E08_g Ruby Orange Develo...ping Seed cDNA Library UCRCS09 Citrus sinensis cDNA clone UCRCS09-8E08-I15-1-5.g, m

  16. 14 CFR 171.311 - Signal format requirements.

    Science.gov (United States)

    2010-01-01

    ... meters (2000 feet) does not exceed −100.5 dBW/m2 for angle guidance and −95.5 dBW/m2 for data, as... dash between 0.39 and 0.48 second. The duration between dots and/or dashes must be one dot plus or... half amplitude point shall be at least 100 microseconds, and the rise and fall times shall be less...

  17. 19 CFR 171.51 - Application and definitions.

    Science.gov (United States)

    2010-04-01

    ... these regulations do not affect the existing legal and equitable rights and remedies of those with an...) Controlled substance. “Controlled substance” has the meaning given in 21 U.S.C. 802. (4) Normal and customary manner. “Normal and customary manner” means that inquiry suggested by particular facts and circumstances...

  18. Characterization of high-temperature oxide films on dysprosium-doped Fe-20Cr alloys by electrochemical techniques

    Institute of Scientific and Technical Information of China (English)

    GUO Pingyi; ZENG Chaoliu; SHAO Yong; QIN Zeshang

    2012-01-01

    The oxidation propegies of Fe-20Cr,Fe-20Cr-0.2Dy and Fe-20Cr-1Dy alloys were studied using gravimetric and electrochemical techniques.The high-temperature oxide films of Dy-doped Fe-20Cr alloys were prepared in air at 900 ℃ for 24,48 and 100 h,respectively.The electrochemical experiment was performed by a three-electrode electrochemical cell and in 0.1 mol/L Na2SO4 aqueous solution.Proper models were built for describing electrochemical impedance spectroscopy of the different oxide layers and the spectra were interpreted in terms of a two-layer model of the films.The results revealed that the oxide films of Dy-doped Fe-20Cr alloys became compacter than that of undoped alloys and retained their good protective ability for a relatively long time.With increasing content of Dy,the protection of the oxide films slightly decreased.Mott-Schottky curves indicated that all the oxides were n-type semi-conductors,and the Nd value of oxide film on Fe-20Cr was much larger than that of Dy-doped Fe-20Cr alloys.The results of kinetic curves and SEM were in agreement with electrochemical impedance spectroscopy and Mott-Schottky data.

  19. Reexamination of Nuclear Shape Transitions in Gadolinium and Dysprosium Isotopes Chains by Using the Geometric Collective Model

    Directory of Open Access Journals (Sweden)

    Khalaf A. M.

    2014-01-01

    Full Text Available The critical points of potential energy surface (PES’s of the limits of nuclear struc- ture harmonic oscillator, axially symmetric rotor and deformed -soft and discussed in framework of the general geometric collective model (GCM. Also the shape phase transitions linking the three dynamical symmetries are studied taking into account only three parameters in the PES’s. The model is tested for the case of 238 92 U , which shows a more prolate behavior. The optimized model parameters have been adjusted by fit- ting procedure using a simulated search program in order to reproduce the experimental excitation energies in the ground state band up to 6 + and the two neutron separation energies.

  20. Critical Rare Earths, National Security, and U.S.-China Interactions: A Portfolio Approach to Dysprosium Policy Design

    Science.gov (United States)

    2015-01-01

    yttrium are often used for pigmentation for consumer products such as paint and sunglasses. REE-based lasers are used for cosmetic, epidermal, and... bacterial cell walls (Takahashi 2005). In acidic solutions, from an initial concentration of 100 micrograms of an REE mixture per liter, the bacteria...Logistics Agency Justification Book , Research, Development, Test, and Evaluation, Defense-Wide,” U.S. Department of Defense, Washington, DC: 2013

  1. Influence of dysprosium addition on the structural, morphological, electrical and magnetic properties of nano-crystalline W-type hexaferrites

    Indian Academy of Sciences (India)

    Ali-Sharbati; Javad-Mola Verdi Khani; G R Amiri; R Mousarezaei

    2015-02-01

    Dysporium (Dy)-substituted W-type barium hexaferrites were prepared by the citrate sol–gel-method. Crystalline structure, morphology, magnetic properties, DC resistivity and microwave absorption properties of BaNi2DyFe16−O27 ( = 0-0.9) were studied using X-ray diffraction, transmission electron microscope (TEM), vibrating sample magnetometer and vector network analyzer and sensitive source meter, respectively. Single-phase W-type barium hexaferrites, with a chemical composition of BaNi2DyFe16−O27 ( = 0-0.9), were formed by being heated at 1250°C for 4 h in air. The magnetic properties such as saturation magnetization (s), and coercivity (c) were calculated from hysteresis loops. Hysteresis loop measurements show that the coercivity values lie in the range of 530–560 Oe with increasing Dy content. It was also observed that magnetization decreases with the increase of Dy content. The DC resistivity was observed to increase from 0.83 × 107 to 6.92 × 107 cm with increasing Dy contents due to the unavailability of Fe3+ ions. Microwave absorption properties of hexaferrite (70 wt%)–acrylic resin (30 wt%) composites were measured by the standing-wave-ratio (SWR) method in the range from 12 to 20 GHz. For sample with = 0.6, a minimum reflection loss of −40 dB was obtained at 16.2 GHz for a layer of 1.7 mm in thickness. Sample with = 0.9 had wide bandwidth absorption in the frequency range of 13.5–18 GHz with reflection losses less than −15 dB. Meanwhile the minimum reflection point shifts toward higher frequency with the increase of Dy content.

  2. L-Shell Ionization Cross Section Measurements of Dysprosium and Samarium by Low-Energy Electron Impact

    Institute of Scientific and Technical Information of China (English)

    GOU Cheng-Jun; WU Zhang-Wen; YANG Dai-Lun; HE Fu-Qing; PENG Xiu-Feng; AN Zhu; LUO Zheng-Ming

    2005-01-01

    @@ The Lα, Lβ and Lγ x-ray production cross sections of Dy and Sm by electron impact are measured at energies from near threshold to tens of keV. In the experiments, thin targets with thick substrates are used. Meanwhile,the electron transport bipartition model is used to eliminate the influence of electrons reflected from the thick substrates on measurements. The measured x-ray production cross sections are also compared with the theoretical predictions by Gryzinski and McGuire.

  3. Generation of White Light from Dysprosium-Doped Strontium Aluminate Phosphor by a Solid-State Reaction Method

    Science.gov (United States)

    Sahu, Ishwar Prasad; Bisen, D. P.; Brahme, N.; Tamrakar, Raunak Kumar

    2016-04-01

    A single-host lattice, white light-emitting SrAl2O4:Dy3+ phosphor was synthesized by a solid-state reaction method. The crystal structure of prepared SrAl2O4:Dy3+ phosphor was in a monoclinic phase with space group P21. The chemical composition of the sintered SrAl2O4:Dy3+ phosphor was confirmed by the energy dispersive x-ray spectroscopy technique. Under ultra-violet excitation, the characteristic emissions of Dy3+ are peaking at 475 nm, 573 nm and 660 nm, originating from the transitions of 4F9/2 → 6H15/2, 4F9/2 →&!nbsp; 6H13/2 and 4F9/2 → 6H11/2 in the 4f9 configuration of Dy3+ ions. Commission International de I'Eclairage color coordinates of SrAl2O4:Dy3+ are suitable for white light-emitting phosphor. In order to investigate the suitability of the samples as white color light sources for industrial uses, correlated color temperature (CCT) and color rendering index (CRI) values were calculated. Values of CCT and CRI were found well within the defined acceptable range. Mechanoluminescence (ML) intensity of SrAl2O4:Dy3+ phosphor increased linearly with increasing impact velocity of the moving piston. Thus, the present investigation indicates piezo-electricity was responsible for producing ML in sintered SrAl2O4:Dy3+ phosphor. Decay rates of the exponential decaying period of the ML curves do not change significantly with impact velocity. The photoluminescence and ML results suggest that the synthesized SrAl2O4:Dy3+ phosphor was useful for the white light-emitting diodes and stress sensor respectively.

  4. Significant enhancement of energy barriers in dinuclear dysprosium single-molecule magnets through electron-withdrawing effects.

    Science.gov (United States)

    Habib, Fatemah; Brunet, Gabriel; Vieru, Veacheslav; Korobkov, Ilia; Chibotaru, Liviu F; Murugesu, Muralee

    2013-09-11

    The effect of electron-withdrawing ligands on the energy barriers of Single-Molecule Magnets (SMMs) is investigated. By introducing highly electron-withdrawing atoms on targeted ligands, the energy barrier was significantly enhanced. The structural and magnetic properties of five novel SMMs based on a dinuclear {Dy2} phenoxo-bridged motif are explored and compared with a previously studied {Dy2} SMM (1). All complexes share the formula [Dy2(valdien)2(L)2]·solvent, where H2valdien = N1,N3-bis(3-methoxysalicylidene) diethylenetriamine, the terminal ligand L = NO3(-) (1), CH3COO(-) (2), ClCH2COO(-) (3), Cl2CHCOO(-) (4), CH3COCHCOCH3(-) (5), CF3COCHCOCF3(-) (6), and solvent = 0.5 MeOH (4), 2 CH2Cl2 (5). Systematic increase of the barrier was observed for all complexes with the most drastic increase seen in 6 when the acac ligand of 5 was fluorinated resulting in a 7-fold enhancement of the anisotropic barrier. Ab initio calculations reveal more axial g tensors as well as higher energy first excited Kramers doublets in 4 and 6 leading to higher energy barriers for those complexes.

  5. Slow Magnetic Relaxation Observed in Dysprosium Compounds Containing Unsupported Near-Linear Hydroxo- and Fluoro-Bridges.

    Science.gov (United States)

    Brunet, Gabriel; Habib, Fatemah; Korobkov, Ilia; Murugesu, Muralee

    2015-07-06

    The encapsulating N1,N3-bis(3-methoxysalicylidene)diethylenetriamine (H2valdien) ligand was employed to isolate two novel Dy(III) compounds which contain rare bridging pathways for lanthanide systems. Compound 1, [Na2Dy(III)2(valdien)2(μ-OH)(dbm)2(H2O)2][Na2Dy(III)2(valdien)2(μ-OH)(NO3)2(dbm)2], where dbm(-) is dibenzoylmethanido, and compound 2, [Na3Dy(III)2(valdien)2(μ-F)(μ3-F)2(Cl)2(MeOH)2]n·0.5(MeOH)·(H2O), both exhibit linear lone hydroxo- and fluoro-bridges, respectively, between the metal centers. The unit cell of 1 comprises two discrete dinuclear molecules, which differ slightly, forming a cation-anion pair, while 2 forms a coordination polymer. The magnetic investigations indicate that both compounds display ferromagnetic coupling between the Dy(III) ions. Magnetic susceptibility measurements in the temperature range 1.8-300 K reveal that the Dy(III) ions in 1 are weakly coupled, resulting in a mononuclear single-molecule magnet-like behavior under an applied field. In the case of 2, the stronger coupling arising from the fluoride-bridge, leads to zero-field single-molecule magnet (SMM) behavior with a non-negligible anisotropy barrier (Ueff) of 42 K.

  6. Effect of Ligand Field Tuning on the SMM Behavior for Three Related Alkoxide-Bridged Dysprosium Dimers.

    Science.gov (United States)

    Peng, Yan; Mereacre, Valeriu; Baniodeh, Amer; Lan, Yanhua; Schlageter, Martin; Kostakis, George E; Powell, Annie K

    2016-01-04

    The synthesis and characterization of three Dy2 compounds, [Dy2(HL1)2(NO3)4] (1), [Dy2(L2)2(NO3)4] (2), and [Dy2(HL3)2(NO3)4] (3), formed using related tripodal ligands with a central tertiary amine bearing picolyl and alkoxy arms, 2-[(2-hydroxy-ethyl)-pyridin-2-ylmethylamino]-ethanol (H2L1), 2-(bis-pyridin-2-ylmethylamino)-ethanol (HL2), and 2-(bis-pyridin-2-ylmethylamino)-propane-1,3-diol (H2L3), are reported. The compounds are rare examples of alkoxide-bridged {Dy2} complexes and display capped square antiprism coordination geometry around each Dy(III) ion. Changes in the ligand field environment around the Dy(III) ions brought about through variations in the ligand donors can be gauged from the magnetic properties, with compounds 1 and 2 showing antiparallel coupling between the Dy(III) ions and 3 showing parallel coupling. Furthermore, slow relaxation of the magnetization typical of SMM behavior could be observed for compounds 2 and 3, suggesting that small variations in the ligand field can have a significant influence on the slow relaxation processes responsible for SMM behavior of Dy(III)-based systems.

  7. Effects of magnetic annealing on structure and multiferroic properties of pure and dysprosium substituted BiFeO 3

    KAUST Repository

    Zhang, Shuxia

    2012-07-01

    In this work, the effects of magnetic annealing on crystal structure and multiferroic properties of BiFeO 3 and Bi 0.85Dy 0.15FeO 3 have been investigated. It is found that the X-ray diffraction patterns of pure BiFeO 3 samples are obviously broadened after magnetic annealing, whereas those of Bi 0.85Dy 0.15FeO 3 samples are almost unchanged. Magnetic field annealing did not affect the magnetic properties of these two kinds of samples much. However, ferroelectric properties of the two materials exhibited different behaviors after magnetic field annealing. For pure BiFeO 3 samples, the remnant polarizations (P r) are suppressed; in contrast, for Bi 0.85Dy 0.15FeO 3 samples, P r is greatly enhanced. Possible mechanisms for the effects of magnetic field annealing have been discussed. © 2012 Elsevier B.V. All rights reserved.

  8. Dielectric relaxation in double potassium yttrium orthophosphate K 3Y(PO 4) 2 doped by praseodymium and dysprosium ions

    Science.gov (United States)

    Szulia, S.; Kosmowska, M.; Kołodziej, H. A.; Mizer, D.; Czupińska, G.

    2011-12-01

    We report the paper presents the results of electric properties of double potassium yttrium orthophosphates doped by lanthanide ions K 3Y( 1-x)Ln x(PO 4) 2 ( x = 0.01, 0.05, Ln = Pr 3+, Dy 3+). Electric permittivity and dielectric loss measurements have been performed on polycrystalline samples in the temperature range -50-120 °C and frequency range 1 kHz-1 MHz by means of HP 4282A impedance meter. The frequency and temperature dependence of electric properties were analyzed by theoretical models of dielectric relaxation in order to obtain information abut molecular dynamic of our solids in external electric field.

  9. Dilution-induced slow magnetic relaxation and anomalous hysteresis in trigonal prismatic dysprosium(III) and uranium(III) complexes.

    Science.gov (United States)

    Meihaus, Katie R; Rinehart, Jeffrey D; Long, Jeffrey R

    2011-09-05

    Magnetically dilute samples of complexes Dy(H(2)BPz(Me2)(2))(3) (1) and U(H(2)BPz(2))(3) (3) were prepared through cocrystallization with diamagnetic Y(H(2)BPz(Me2)(2))(3) (2) and Y(H(2)BPz(2))(3). Alternating current (ac) susceptibility measurements performed on these samples reveal magnetic relaxation behavior drastically different from their concentrated counterparts. For concentrated 1, slow magnetic relaxation is not observed under zero or applied dc fields of several hundred Oersteds. However, a 1:65 (Dy:Y) molar dilution results in a nonzero out-of-phase component to the magnetic susceptibility under zero applied dc field, characteristic of a single-molecule magnet. The highest dilution of 3 (1:90, U:Y) yields a relaxation barrier U(eff) = 16 cm(-1), double that of the concentrated sample. These combined results highlight the impact of intermolecular interactions in mononuclear single-molecule magnets possessing a highly anisotropic metal center. Finally, dilution elucidates the previously observed secondary relaxation process for concentrated 3. This process is slowed down drastically upon a 1:1 molar dilution, leading to butterfly magnetic hysteresis at temperatures as high as 3 K. The disappearance of this process for higher dilutions reveals it to be relaxation dictated by short-range intermolecular interactions, and it stands as the first direct example of an intermolecular relaxation process competing with single-molecule-based slow magnetic relaxation.

  10. Challenging lanthanide relaxation theory: erbium and thulium complexes that show NMR relaxation rates faster than dysprosium and terbium analogues.

    Science.gov (United States)

    Funk, Alexander M; Harvey, Peter; Finney, Katie-Louise N A; Fox, Mark A; Kenwright, Alan M; Rogers, Nicola J; Senanayake, P Kanthi; Parker, David

    2015-07-07

    Measurements of the proton NMR paramagnetic relaxation rates for several series of isostructural lanthanide(III) complexes have been performed in aqueous solution over the field range 1.0 to 16.5 Tesla. The field dependence has been modeled using Bloch-Redfield-Wangsness theory, allowing values for the electronic relaxation time, Tle and the magnetic susceptibility, μeff, to be estimated. Anomalous relaxation rate profiles were obtained, notably for erbium and thulium complexes of low symmetry 8-coordinate aza-phosphinate complexes. Such behaviour challenges accepted theory and can be interpreted in terms of changes in Tle values that are a function of the transient ligand field induced by solvent collision and vary considerably between Ln(3+) ions, along with magnetic susceptibilities that deviate significantly from free-ion values.

  11. Distance determination from dysprosium induced relaxation enhancement: a case study on membrane-inserted WALP23 polypeptides

    NARCIS (Netherlands)

    Lueders, P.; Razzaghi, S.; Jäger, H.; Tschaggelar, R.; Hemminga, M.A.; Yulikov, M.; Jeschke, G.

    2013-01-01

    Membrane incorporated synthetic a-helical polypeptides labelled with Dy(III) chelate complexes and nitroxide radicals were studied by the inversion recovery (IR) technique and Dy(III)-nitroxide distances were obtained. A comparison of obtained distances with the previously reported Gd(III)-nitroxide

  12. Influence of dysprosium substitution on magnetic and mechanical properties of high intrinsic coercivity Nd-Fe-B magnets prepared by double-alloy powder mixed method

    Institute of Scientific and Technical Information of China (English)

    胡志华; 瞿海锦; 马冬威; 罗成; 王会杰

    2016-01-01

    The double-alloy powder mixed method is very proper for developing new small-mass products by changing the composi-tion of sintered Nd-Fe-B magnets, and there is little research on this aspect. The variation on magnetic and mechanical properties of high intrinsic coercivity Nd-Fe-B magnets prepared by double-alloy powder mixed method was discussed, which is a method blend-ing two-type main phase alloy powders with different components. The results showed that the intrinsic coercivity and density of sin-tered Nd-Fe-B magnets increased gradually with the increase in Dy content, and the double-alloy powder mixed method could obtain high intrinsic coercivity Nd-Fe-B magnets with good crystallographic alignment and microstructure. The bending strength of sintered Nd-Fe-B magnets declined, and the Rockwell hardness of sintered Nd-Fe-B magnets first declined, and then increased with the in-crease in Dy content. The microstructure showed that there existed the phenomenon that the Dy element diffused into main phase dur-ing sintering process, and the distribution of Dy content in main phase had some variation in homogeneity as a result of incomplete reaction between the double-alloy powder types.

  13. Effect of dysprosium substitution on electrical properties of SrBi{sub 4}Ti{sub 4}O{sub 15}

    Energy Technology Data Exchange (ETDEWEB)

    Mamatha, B., E-mail: boinanemamatha@gmail.com; Sarah, P.

    2014-10-15

    SrBi{sub 4−x}Dy{sub x}Ti{sub 4}O{sub 15} (with x = 0.02, 0.04, 0.06 and 0.08) powders have been synthesized using the stoichiometric amounts of nitrates and oxides of the constituent materials through sol–gel method. The compound so formed is characterized using X-ray diffraction. The density and lattice parameters are calculated. The impedance and electrical conductivity properties are investigated. The imaginary part of impedance as a function of frequency shows Debye like relaxation. Impedance data presented in the Nyquist plot which is used to identify an equivalent circuit and the fundamental circuit parameters are determined at different temperatures. The results of bulk a.c. conductivity as a function of frequency at different temperatures are presented. The dielectric behavior was investigated. Permittivity was calculated based on the relaxation frequency using an alternative approach based on the variation of the imaginary impedance component as a function of reciprocal angular frequency. The frequency dependence of real and imaginary permittivities was also investigated. - Highlights: • SrBi{sub 4−x}Dy{sub x}Ti{sub 4}O{sub 15} (x = 0.02, 0.04, 0.06 and 0.08) powders are produced by sol–gel method. Phase formation is confirmed by XRD analysis. • Frequency dependent imaginary part of impedance shows distribution of relaxation in system. • Broadness of Z″ peak shows distribution of relaxation frequency. • Increase in peak width at ½ maxima of Z″ with increase of temperature shows increase of relaxation frequency distribution. • Cole–Cole plots are resolved into two different circles, ascribed to different mechanisms of polarization and relaxation phenomena.

  14. Hexanuclear, heterometallic, Ni₃Ln₃ complexes possessing O-capped homo- and heterometallic structural subunits: SMM behavior of the dysprosium analogue.

    Science.gov (United States)

    Goura, Joydeb; Guillaume, Rogez; Rivière, Eric; Chandrasekhar, Vadapalli

    2014-08-04

    The reaction of hetero donor chelating mannich base ligand 6,6'-{(2-(dimethylamino)ethylazanediyl)bis(methylene)}bis(2-methoxy-4-methylphenol) with Ni(ClO4)2·6H2O and lanthanide(III) salts [Dy(III) (1); Tb(III) (2); Gd (III) (3); Ho(III) (4); and Er(III) (5)] in the presence of triethylamine and pivalic acid afforded a series of heterometallic hexanuclear Ni(II)-Ln(III) coordination compounds, [Ni3Ln3(μ3-O)(μ3-OH)3(L)3(μ-OOCCMe3)3]·(ClO4)·wCH3CN·xCH2Cl2·yCH3OH·zH2O [for 1, w = 8, x = 3, y = 0, z = 5.5; for 2, w = 0, x = 5, y = 0, z = 6.5; for 3, w = 15, x = 18, y = 3, z = 7.5; for 4, w = 15, x = 20, y = 6, z = 9.5; and for 5, w = 0, x = 3, y = 2, z = 3]. The molecular structure of these complexes reveals the presence of a monocationic hexanuclear derivative containing one perchlorate counteranion. The asymmetric unit of each of the hexanuclear derivatives comprises the dinuclear motif [NiLn(L)(μ3-O)(μ3-OH)(μ-Piv)]. The cation contains three interlinked O-capped clusters: one Ln(III)3O and three Ni(II)Ln(III)2O. Each of the lanthanide centers is eight- coordinated (distorted trigonal-dodecahedron), while the nickel centers are hexacoordinate (distorted octahedral). The study of the magnetic properties of all compounds are reported and suggests single molecule magnet behavior for the Dy(III) derivative (1).

  15. Two-dimensional dysprosium(III triiodate(V dihydrate, Dy(IO33(H2O·H2O

    Directory of Open Access Journals (Sweden)

    Laishun Qin

    2009-08-01

    Full Text Available During our research into novel nonlinear optical materials using 1,10-phenanthroline as an appending ligand on lanthanide iodates, crystals of an infinite layered DyIII iodate compound, Dy(IO33(H2O·H2O, were obtained under hydrothermal conditions. The DyIII cation has a dicapped trigonal prismatic coordination environment consisting of one water O atom and seven other O atoms from seven iodate anions. These iodate anions bridge the DyIII cations into a two-dimensional structure. Through O—H...O hydrogen bonds, all of these layers stack along [111], giving a supramolecular channel, with the solvent water molecules filling the voids.

  16. Two-dimensional dysprosium(III) triiodate(V) dihydrate, Dy(IO3)3(H2O)·H2O

    Science.gov (United States)

    Chai, Wenxiang; Song, Li; Shi, Hongsheng; Qin, Laishun; Shu, Kangying

    2009-01-01

    During our research into novel nonlinear optical materials using 1,10-phenanthroline as an appending ligand on lanthanide iodates, crystals of an infinite layered DyIII iodate compound, Dy(IO3)3(H2O)·H2O, were obtained under hydro­thermal conditions. The DyIII cation has a dicapped trigonal prismatic coordination environment consisting of one water O atom and seven other O atoms from seven iodate anions. These iodate anions bridge the DyIII cations into a two-dimensional structure. Through O—H⋯O hydrogen bonds, all of these layers stack along [111], giving a supra­molecular channel, with the solvent water mol­ecules filling the voids. PMID:21583297

  17. 吡罗昔康镝配合物的合成与表征%Synthesis and characterization of the complex of piroxicam and dysprosium

    Institute of Scientific and Technical Information of China (English)

    张艳军; 石俊; 孙体健; 徐隋意; 曹晓峰

    2009-01-01

    利用热乙醇搅拌法合成吡罗昔康和稀土金属镝的配合物,通过紫外光谱、红外光谱、元素分析、电导率、差热-热重等方法对其进行表征,最后确定其组成为Dy(pir)2C2H5OHCl3·2H2O.

  18. Multicolor photoluminescence and energy transfer properties of dysprosium and europium-doped Gd{sub 2}O{sub 3} phosphors

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Yanxia; Liu, Guixia, E-mail: liuguixia22@163.com; Wang, Jinxian; Dong, Xiangting; Yu, Wensheng

    2015-11-15

    In this study, a series of Gd{sub 2}O{sub 3}: Ln{sup 3+} (Ln = Dy, Eu) submicrospheres were successfully prepared by a hydrothermal method and a subsequent higher temperature pyrolysis. X-ray diffraction (XRD), Fourier transform infrared (FT-IR), field emission scanning electron microscope (FESEM), energy-dispersive X-ray spectrometer (EDS), photoluminescence (PL) spectra and vibrating sample magnetometer (VSM) were utilized to characterize the as-prepared samples. The precursor sample thoroughly decomposed into Gd{sub 2}O{sub 3} submicrospheres with a diameter of about 550 nm after calcination. Under UV excitation, the samples exhibit multicolor emissions including yellow-green, yellow, red as well as white, moreover, the Dy{sup 3+} ions acted as donors can transfer the energy to Eu{sup 3+} served as acceptors in Gd{sub 2}O{sub 3}: Dy{sup 3+}, Eu{sup 3+} system. The interaction between Dy{sup 3+} ions and Eu{sup 3+} ions is verified to be phonon-assisted electric quadrupole–quadrupole interaction. Multicolor luminescence including white light emission can be obtained through varying the content of Eu{sup 3+} or adopting different excitation wavelengths in Dy{sup 3+} and Eu{sup 3+} co-doped Gd{sub 2}O{sub 3} system. The energy transfer efficiency reaches 88.2% when the doped concentration of Eu{sup 3+} is 0.035. The CIE chromaticity diagram directly reveals the variability of the hue of the as-prepared samples. Besides, the as-prepared samples exhibit paramagnetic properties at room temperature. This type of color-tunable luminescence phosphors has promising applications in the fields of photoelectronic devices and biomedical science. - Graphical abstract: Tunable multicolor emissions and energy transfer properties of lanthanides (Ln{sup 3+}, Ln{sup 3+} = Dy{sup 3+}, Eu{sup 3+}) doped cubic Gd{sub 2}O{sub 3} submicrospheres prepared by hydrothermal method and a subsequent calcination. - Highlights: • The as-prepared samples can exhibit multicolor emissions. • Dy{sup 3+} transfer energy to Eu{sup 3+} in Dy{sup 3+} and Eu{sup 3+} co-doped Gd{sub 2}O{sub 3}. • The as-prepared phosphor has promising applications in the fields of photoelectronic devices and biomedical science.

  19. Emission from Divalent Dysprosium (Dy2+ )in Crystalline Strontium Tetraborate%晶态四硼酸锶中二价镝的发射

    Institute of Scientific and Technical Information of China (English)

    许武; Peterson; J; R

    2001-01-01

    Emission spectra from SrB4O7 doped with Dy2O3 and heated in air have been recorded at room temperature. A change in oxidation state from Dy3+ to Dy2+ was observed. Optimum production of Dy2+ ion occurs when the sample is heated in air at about 650℃. Two broad emission bands centered in the vicinity of 550 and 660nm have been observed from the sample under the excitation of 457.9nm. It is suggested that these bands are due to Dy2 + ion emission from the 5d band into the ground state 4f level (5I8). Several conditions promoting the reduction of Dy3+ion in this matrix are discussed. To aid the reduction of Dy3+ ion, we have also prepared SrB4O7 doped with Dy2O3 in Ar/H2 (4 % ) atmosphere and compared the optical characteristics of Dy2 + ion in these samples with those from the samples prepared in air. The range of g-element reducibility and stabilization in SrB4O7 has been extended from Tm2+[ E0 (Tm3+/Tm2+) = -2.3V] to Dy2+ [E0(Dy3+/Dy2 +) = -2.6V] in the present work; however, the limit of this facile reduction process has not been determined yet.%在室温下测量了在空气中灼烧掺杂Dy2O3的SrB4O7的发射光谱.观测到了由Dy3+到Dy2+氧化态的变化.经优化,当在空气中灼烧温度为650℃时为产生Dy2+的最佳温度.在457.9nm的激发下测出了两个峰位分别位于550和660nm的宽发射带.我们认为这两个宽发射带是由Dy2+离子由5d态向4f基态能级(5I8)跃迁产生的.讨论了几个有益于在这种基质中还原Dy3+离子的条件.为了实现Dy3+离子的还原,我们还在Ar/H2(4%)气氛中制备了Dy2O3掺杂的SrB4O7,比较了这种样品和在空气中所制备的样品的光学特性.本文还对标志SrB4O7还原性和稳定性的g-因子由Tm2+的[Eo(Tm3+/Tm2+=-2.3V]推导出Dy2+的[E0(Dy3+/Dy2+)=-2.6V],但对这种还原过程的局限性尚未确定.

  20. CCDC 1402057: Experimental Crystal Structure Determination : pentakis(tetra-n-butylammonium) tetrakis(mu-oxalato)-dodecachloro-tetranitrosyl-ethanol-tetra-ruthenium-dysprosium sesquihydrate

    KAUST Repository

    Kuhn, Paul-Steffen

    2015-01-01

    An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

  1. 48 CFR 3009.171-4 - Determination of ownership, control, or operation.

    Science.gov (United States)

    2010-10-01

    ... following types of roles or interests with respect to the business concern: (1) Director or officer... of a board of directors, a secretary, treasurer, president, a vice president, or other chief official..., or decision making. (d) Generally, the existence of one or more of the roles or interests set forth...

  2. 40 CFR 171.4 - Standards for certification of commercial applicators.

    Science.gov (United States)

    2010-07-01

    ... into food and feed channels, as well as proper disposal of unused treated seeds. (5) Aquatic pest... with the label. (ii) Safety. Factors including: (a) Pesticide toxicity and hazard to man and common... substrate; (c) Presence of fish, wildlife and other non-target organisms; and (d) Drainage patterns. (iv...

  3. [Depression and burden on primary caregivers of elderly persons with physical dependence of the UMF 171].

    Science.gov (United States)

    Navarro-Sandoval, Cristina; Uriostegui-Espíritu, Lizbeth Carlota; Delgado-Quiñones, Edna Gabriela; Sahagún-Cuevas, Minerva Natalia

    2017-01-01

    Introducción: según la ENSANUT del 2012, más de una cuarta parte de los adultos mayores presenta algún grado de discapacidad, precisando de un cuidador primario para realizar las actividades básicas de la vida diaria. El objetivo es determinar la prevalencia de depresión y sobrecarga en cuidadores primarios de pacientes geriátricos con dependencia física. Métodos: estudio transversal descriptivo con muestreo no probabilístico que incluyó a los cuidadores primarios de los pacientes geriátricos con dependencia física. Se aplicó la escala de Barthel para medir el nivel de dependencia física en el paciente geriátrico; y a los cuidadores primarios se les aplicó el cuestionario de Beck para depresión y la escala de Zarit para evaluar el nivel de sobrecarga Resultados: de los 76 cuidadores primarios, el 55.3% se encontraba sin depresión, el 32.9% presentaban depresión leve, y el 11.8% depresión moderada. De acuerdo a la escala de Zarit, el 40.8% tenían ausencia de sobrecarga, el 44.7% presentaban sobrecarga ligera, y el 14.5% sobrecarga intensa. Conclusiones: el papel del cuidador primario supone una tarea estresante, la cual puede interferir en su salud familiar; por lo tanto, nuestra función es brindar atención no solo al paciente geriátrico dependiente, sino también a su cuidador.

  4. SU-E-J-171: Surface Imaging Based Intrafraction Motion Assessments for Whole Brain Radiotherapy

    Energy Technology Data Exchange (ETDEWEB)

    Wiant, D; Vanderstraeten, C; Maurer, J; Pursley, J; Terrell, J; Sintay, B [Cone Health Cancer Center, Greensboro, NC (United States)

    2014-06-01

    Purpose: To quantify and characterize intrafraction motion for whole brain radiotherapy treatments in open face masks using 3D surface imaging. Methods: Fifteen whole brain patients were monitored with 3D surface imaging over a total of 202 monitoring sessions. Mean translations and rotations were calculated over each minute, each session, and over all sessions combined. The percentage of each session that the root mean square (RMS) of the linear translations were outside of 2 mm, 3 mm, 4 mm, and 5 mm were determined for each patient. Correlations between mean translations per minute and time and between standard deviation per minute and time were evaluated using Pearson's r value. Results: The mean RMS translation averaged over all patients was 1.45 mm +/− 1.52 mm. The patients spent an average of 18%, 10%, 6%, and 3% of the monitoring time outside of 2 mm, 3 mm, 4 mm, and 5 mm RMS tolerances, respectively. The RMS values averaged over all patients were 1.31 mm +/− 0.98 mm, 1.52 +/- 1.04, and 1.30 mm +/− 0.71 mm over the 1th, 5th, and 10th minutes of monitoring, respectively. Neither, the RMS values (p = 0.15) or the standard deviations of the RMS values (p = 0.16) showed significant correlations with time. Conclusion: The patients were positioned within 2 mm of isocenter, which was the initial set-up tolerance, for the majority of their treatments. The average position changed by < 0.3 mm over 10 minutes of monitoring. Short term movements, reflected by the standard deviations, where on the order of 1 mm. This immobilization system provides adequate immobilization over a course of treatment for whole brain radiotherapy. This system may also be suitable for head and neck or stereotactic radiosurgery treatments as well.

  5. 42 CFR 137.171 - Where do Self-Governance Tribes send their audit reports?

    Science.gov (United States)

    2010-10-01

    ...) For fiscal years ending on or before June 30, 1996, the audit report must be sent to: National... years, beginning after June 30, 1996, the audit report must be sent to: Single Audit Clearinghouse, 1201...

  6. 22 CFR 171.14 - Fees to be charged-general.

    Science.gov (United States)

    2010-04-01

    ... will charge at the actual direct cost of providing the service. This will include the cost of operating the central processing unit (CPU) for that portion of operating time that is directly attributable to... courier, etc. (f) Payment shall be in the form either of a personal check or bank draft drawn on a bank...

  7. ROSCOE Manual, Volume 17-1 - High-Altitude Debris-Energy Deposition.

    Science.gov (United States)

    1979-06-30

    82172)’ Group-i Step 6. Determine the newly-formed ion-species densities corresponding to the ion-pair density: 61[N + ] = (N+) ipIP (19a) 61[0 +] = (O...iplP (19b) 61 [N+] = (N+) ipIP (19c) li[02] + iP (19d) One may verify, by use of Equations (18), (17), (14), and (13), that the sum of Equations (19a...Center ATTN: PME 117-20 12 cy ATTN: DO Naval Intelligence Support Ctr. Field Command ATTN: Document Control Defense Nuclear Agency ATTN: FCPR Naval Ocean

  8. 26 CFR 1.171-3 - Special rules for certain bonds.

    Science.gov (United States)

    2010-04-01

    ... reasonably expected that the bond will yield 12 percent, compounded annually. E uses the cash receipts and... principal amount. M uses the cash receipts and disbursements method of accounting. (ii) Determination...

  9. 171 Géochimie comparative des sédiments de ruisseaux des rives ...

    African Journals Online (AJOL)

    Valued Packard Bell Customer

    François Bidzang NDONG1*, Sylvestre Martial NTOMBA1, Eric José MESSI2 et Divine OKIA3 ... at the origin of the spatial distribution of these elements in the region. .... de ruisseaux ont été récoltés suivant les règles de l'art ; un préleveur.

  10. Metabolic activity, experiment M171. [space flight effects on human metabolism

    Science.gov (United States)

    Michel, E. L.; Rummel, J. A.

    1973-01-01

    The Skylab metabolic activity experiment determines if man's metabolic effectiveness in doing mechanical work is progressively altered by a simulated Skylab environment, including environmental factors such as slightly increased pCO2. This test identified several hardware/procedural anomalies. The most important of these were: (1) the metabolic analyzer measured carbon dioxide production and expired water too high; (2) the ergometer load module failed under continuous high workload conditions; (3) a higher than desirable number of erroneous blood pressure measurements were recorded; (4) vital capacity measurements were unreliable; and (5) anticipated crew personal exercise needs to be more structured.

  11. 9 CFR 381.171 - Definition and standard for “Turkey Ham.”

    Science.gov (United States)

    2010-01-01

    ... provided in a regulation permitting that use in this subchapter or 9 CFR Chapter III, Subchapter E, or in 21 CFR Chapter I, Subchapter A or Subchapter B. The product may also contain cure accelerators, phosphates, and flavoring agents as provided in a regulation permitting that use in this subchapter or 9...

  12. 26 CFR 1.501(c)(17)-1 - Supplemental unemployment benefit trusts.

    Science.gov (United States)

    2010-04-01

    ... 26 Internal Revenue 7 2010-04-01 2010-04-01 true Supplemental unemployment benefit trusts. 1.501(c... Supplemental unemployment benefit trusts. (a) Requirements for qualification. (1) A supplemental unemployment... the purpose of providing supplemental unemployment compensation benefits (as defined in section 501(c...

  13. 49 CFR 171.1 - Applicability of Hazardous Materials Regulations (HMR) to persons and functions.

    Science.gov (United States)

    2010-10-01

    .... Movement of a hazardous material by rail car, aircraft, motor vehicle, or vessel (except as delegated by... of a rail car on private track. (4) Rail and motor vehicle movements of a hazardous material... marking, or other medium, or, in the case of a rail car, until the car is delivered to a private track...

  14. 46 CFR 171.073 - Treatment of stepped and recessed bulkheads in Type II subdivision.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Treatment of stepped and recessed bulkheads in Type II... Treatment of stepped and recessed bulkheads in Type II subdivision. (a) A main transverse watertight bulkhead may not be stepped unless additional watertight bulkheads are located as shown in Figure...

  15. 46 CFR 171.067 - Treatment of stepped and recessed bulkheads in Type I subdivision.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Treatment of stepped and recessed bulkheads in Type I... Treatment of stepped and recessed bulkheads in Type I subdivision. (a) For the purpose of this section— (1) The main transverse watertight bulkhead immediately forward of a stepped bulkhead is referred to...

  16. Regulatory cross-talk in the double par locus of plasmid pB171

    DEFF Research Database (Denmark)

    Ringgaard, Simon; Ebersbach, Gitte; Borch, Jonas;

    2007-01-01

    partition and promoter repression complexes. Surprisingly, ParB repressed transcription of the noncognate par operon, indicating cross-talk and possibly epistasis between the two systems. The par promoters, P1 and P2, affected each other negatively. The DNA binding activities of ParR and ParB correlated...

  17. 19 CFR 171.52 - Petition for expedited procedures in an administrative forfeiture proceeding.

    Science.gov (United States)

    2010-04-01

    ... industry vessels. Where a commercial fishing industry vessel proceeding to or from a fishing area or... the summons no later than the date specified in the summons. When a commercial fishing industry vessel... physically seized. (c) Elements to be established in petition. (1) The petition for expedited...

  18. On the Validity of the Psychosocial Maturity Scales: Relationship to Teacher Ratings. Report No. 171.

    Science.gov (United States)

    Josselson, Ruthellen; And Others

    This study attempts to provide evidence for the criterion validity of the Psychosocial Maturity (PSM) scales. Students' scores on the nine PSM scales were related to teachers' ratings of student PSM-related behavior. All scales except Trust significantly differentiated students rated high on PSM-related traits from students not rated high. Only…

  19. Percutaneous tracheostomy with the guide wire dilating forceps technique : presentation of 171 consecutive patients

    NARCIS (Netherlands)

    Fikkers, Bernard G; van Heerbeek, Niels; Krabbe, Paul F M; Marres, Henri A M; van den Hoogen, Frank J A

    2002-01-01

    BACKGROUND: Evaluation of percutaneous tracheostomy (PT) with the guide wire dilating forceps (GWDF) technique. METHODS: Prospective study of perioperative complications, retrospective analysis of early and late complications in an ICU in a teaching university hospital. RESULTS: The success rate of

  20. Proceedings of the Society of Photo-Optical Instrumentation Engineers, Optical Components: Manufacture & Evaluation, Volume 171

    Science.gov (United States)

    2007-11-02

    plotted from a computer raytrace of the complete interferometer system and recorded on film. Some of the energy in the test and reference beams is...parabola) was entered into the raytrace program along with the optical design data for the interferometer system. For this particular surface the...computer raytrace . The relay was adjusted for a sharp image of the test surface and the hologram was installed. The reference beam was adjusted to

  1. Biodegradation of 3-Nitrotyrosine by Burkholderia sp. Strain JS165 and Variovorax paradoxus JS171

    Science.gov (United States)

    2006-02-01

    and B. Minambres. 2004. The homogentisate pathway: a central catabolic pathway involved in the degradation of L- phenylalanine , L-tyrosine, and 3...acetate-3- hydroxylase . A two-protein component enzyme. J. Biol. Chem. 267:25848–25855. 4. Bruhn, C., H. Lenke, and H.-J. Knackmuss. 1987. Nitrosubstituted

  2. 49 CFR 171.23 - Requirements for specific materials and packagings transported under the ICAO Technical...

    Science.gov (United States)

    2010-10-01

    ... transported under the ICAO Technical Instructions, IMDG Code, Transport Canada TDG Regulations, or the IAEA... transported under the ICAO Technical Instructions, IMDG Code, Transport Canada TDG Regulations, or the IAEA Regulations. All shipments offered for transportation or transported in the United States under the...

  3. AN/GRC-171 Rivet Switch Multichannel UHF/AM Transceiver

    Science.gov (United States)

    1975-03-01

    o. 6 o.S3 ■o-iT^ -o.S’Z f o. 4 O/ -^■Z, ~ f9 .S +1.4 2.1 6-g 7. 7 / 2 g o.o 𔃻-1 JisA- - o.l fo.S ici-r FORM ,__ AFCS MAY «S 199...9/* zs L-f-ZO 7s. to ZJ-S’ 59.9s GENERAL PURPOSE FORM AFCS iaoot/io«i . o.^...,«.., ,,,,„ i ,„„„ lIBS^pnnwWWIW^ Bpp ^BWTWRPIP»^ 4.3.15 AN

  4. Yeast Interacting Proteins Database: YHR171W, YBR217W [Yeast Interacting Proteins Database

    Lifescience Database Archive (English)

    Full Text Available th phosphatidylethanolamine, required steps in autophagosome formation Rows with ... of ubiquitin-activating enzymes; mediates the conjugation of Atg12p with Atg5p and Atg8p with phosphatidylethanolamine, required ste...ps in autophagosome formation Rows with this bait as bait (1) Rows with this bait a

  5. Yeast Interacting Proteins Database: YNR007C, YHR171W [Yeast Interacting Proteins Database

    Lifescience Database Archive (English)

    Full Text Available hatidylethanolamine, required steps in autophagosome formation Rows with this prey as prey (1) Rows with thi...lethanolamine, required steps in autophagosome formation Rows with this prey as p...ly of ubiquitin-activating enzymes; mediates the conjugation of Atg12p with Atg5p and Atg8p with phosphatidy

  6. 48 CFR 3009.171-7 - Contract award approval procedures for contractors with felony convictions.

    Science.gov (United States)

    2010-10-01

    ... felony no longer calls into question the individual or business concern's integrity or business ethics... individual or business concern's integrity or business ethics and that an award would be consistent with the... request to permit award of a contract for FPS guard services to a business concern owned, controlled,...

  7. Activation of Small Molecules by DyI_2 and Dy

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    1 Results The reactivities of dysprosium diiodide and metallic dysprosium toward small molecules are discussed.For instance,DyI2-induced silyl radical reactions are described.The combination of dysprosium diiodide and dichloromethane can serve as an effective methylene transfer reagent for cyclopropanation of unfunctionalized alkenes beyond that possible with other metal-dichloromethane systems.Furthermore,we report that the combination of chlorosilane and metallic Dy can also serve as an effective prom...

  8. SU-E-T-171: Characterization of the New Xoft Axxent Electronic Brachytherapy Source Using PRESAGE Dosimeters

    Energy Technology Data Exchange (ETDEWEB)

    Steinmann, A; Followill, D; Ibbott, G [UT MD Anderson Cancer Center, Houston, TX (United States); Adamovics, J [John Adamovics, Skillman, NJ (United States)

    2015-06-15

    Purpose: To characterize the Xoft Axxent electronic brachytherapy source using PRESAGE™ dosimeters to obtain independent confirmation of TG-43U1 dosimetry values from previous studies and ascertain its reproducibility in HDR brachytherapy. Methods: PRESAGE™ dosimeters are solid, polyurethane-based dosimeters doped with radiochromic leucodyes that produce a linear optical-density response when exposed to radiation. Eight 1-kg dosimeters were scanned prior to irradiation on an optical-CT scanner to eliminate background signal and any optical imperfections from each dosimeter. To quantify potential imaging artifacts due to oversaturated responses in the immediate range of the source, half of the eight dosimeters were cast with a smaller channel diameter of 5.4 mm, and the other half were cast with a larger channel diameter of 15mm. During irradiation, the catheters were placed in the center of each channel. Catheters fit the 5.4mm diameters channels whereas polyurethane plugs were inserted into the larger channels to create a sturdy, immobile catheter which allowed uniform dose distributions. Two dosimeters of each 5.4mm and 15mm were irradiated at either 1517.3 cGy or 2017.5 cGy. Post-irradiation scans were performed within 48 hours of irradiation. A 3D reconstruction based on subtraction of these two images and the relative dose measurements were made using in-house software. Results: Comparing measured radial dose rates with previous results revealed smaller percent errors when PRESAGE™ irradiations were at lower maximum dose. The dosimeters showed small deviations in radial dose function, g{sub p} (r), from previous studies. Among the dosimeters irradiated at 1517.3 cGy, the g{sub p}(r) compared to previous studies fluctuated from 0.0043 to 0.3922. This suggests small fluctuations can drastically change radial dose calculations. Conclusion: The subtraction of pre-irradiation and post-irradiation scans of PRESAGE™ dosimeters using an optical-CT scanner shows promising results in determining 3D dosimetry for Xoft Axxent devices; however, further research is recommended. NIH Grant#: 5-U24-CA081647-13; ROI Grant#: 5R01CA100835.

  9. 19 CFR Appendix C to Part 171 - Customs Regulations Guidelines for the Imposition and Mitigation of Penalties for Violations of...

    Science.gov (United States)

    2010-04-01

    ..., association or partnership. 5. The status of the license of a license holder who is a corporate officer or... list a new corporate office because corporate records have not been kept current. ii. Listing an... violations. D. Penalties for failure to exercise due diligence in payment, refund or deposit of monies...

  10. 46 CFR 171.055 - Intact stability requirements for a monohull sailing vessel or a monohull auxiliary sailing vessel.

    Science.gov (United States)

    2010-10-01

    ... distance in feet (meters) from the center of A to the center of the underwater lateral area or... partially protected waters— EC01MR91.010 where— X=1.0 long tons/sq. ft. (10.9 metric tons/sq. meter). Y=1.1 long tons/sq. ft. (12.0 metric tons/sq. meter). Z=1.25 long tons/sq. ft. (13.7 metric tons/sq....

  11. 19 CFR Appendix A to Part 171 - Guidelines for Disposition of Violations of 19 U.S.C. 1497

    Science.gov (United States)

    2010-04-01

    ... Duty or the domestic value, whichever is lower: a. Communications with the violator are impaired because of language barrier, mental condition, or physical ailment; b. Violator cooperates with Customs...

  12. FCJ-171 Expectations denied: Fan and industry conflict around the localisation of the Japanese video game Yakuza 3

    Directory of Open Access Journals (Sweden)

    Craig Norris

    2014-12-01

    Full Text Available Online fan cultures provides researchers with a space to observe and analyse the development and establishment of fan participation with media properties. The visibility of, and zealous postings by, fans on online forums offers a valuable opportunity to explore what happens when fans feel their expectations are being denied or limited by creator or industry actions. This article examines the fallout around the localisation of the Japanese video game Yakuza 3 into the West in 2010.

  13. 26 CFR 31.3401(a)(17)-1 - Remuneration for services performed on a boat engaged in catching fish.

    Science.gov (United States)

    2010-04-01

    ... 26 Internal Revenue 15 2010-04-01 2010-04-01 false Remuneration for services performed on a boat... Remuneration for services performed on a boat engaged in catching fish. (a) Remuneration for services performed... receive, any cash remuneration, other than remuneration that is described in subparagraph (1) of...

  14. 10 CFR 171.16 - Annual fees: Materials licensees, holders of certificates of compliance, holders of sealed source...

    Science.gov (United States)

    2010-01-01

    ... material for extraction of metals other than uranium or thorium, including licenses authorizing the possession of byproduct waste material (tailings) from source material recovery operations, as well as... Heap Leach facilities 31,200 (b) Basic In Situ Recovery facilities 29,700 (c) Expanded In Situ...

  15. Study of reactive blue 171 dye degradation in hybrid system of UV/H2O2 & SBAR

    Directory of Open Access Journals (Sweden)

    leila Moradi Pasand

    2014-03-01

    Conclusion: According to the results, because of complexity of dye structure, biological system was not able to remove the dye as efficient as hybrid system of advanced oxidation processes UV/H2O2 with SBAR.

  16. The Open Data Imperative: How the Cultural Heritage Community Can Address the Federal Mandate. CLIR Publication No. 171

    Science.gov (United States)

    Allard, Suzie; Lee, Christopher; McGovern, Nancy Y.; Bishop, Alice

    2016-01-01

    Data are a valuable national resource for a variety of stakeholders across all sectors of society. Dramatic advances in information and communication technology have opened up unprecedented opportunities for broad public access, innovative research, and citizen engagement, but this potential can be realized only if data are properly managed and…

  17. Itzï (version 17.1): an open-source, distributed GIS model for dynamic flood simulation

    Science.gov (United States)

    Guillaume Courty, Laurent; Pedrozo-Acuña, Adrián; Bates, Paul David

    2017-05-01

    Worldwide, floods are acknowledged as one of the most destructive hazards. In human-dominated environments, their negative impacts are ascribed not only to the increase in frequency and intensity of floods but also to a strong feedback between the hydrological cycle and anthropogenic development. In order to advance a more comprehensive understanding of this complex interaction, this paper presents the development of a new open-source tool named Itzï that enables the 2-D numerical modelling of rainfall-runoff processes and surface flows integrated with the open-source geographic information system (GIS) software known as GRASS. Therefore, it takes advantage of the ability given by GIS environments to handle datasets with variations in both temporal and spatial resolutions. Furthermore, the presented numerical tool can handle datasets from different sources with varied spatial resolutions, facilitating the preparation and management of input and forcing data. This ability reduces the preprocessing time usually required by other models. Itzï uses a simplified form of the shallow water equations, the damped partial inertia equation, for the resolution of surface flows, and the Green-Ampt model for the infiltration. The source code is now publicly available online, along with complete documentation. The numerical model is verified against three different tests cases: firstly, a comparison with an analytic solution of the shallow water equations is introduced; secondly, a hypothetical flooding event in an urban area is implemented, where results are compared to those from an established model using a similar approach; and lastly, the reproduction of a real inundation event that occurred in the city of Kingston upon Hull, UK, in June 2007, is presented. The numerical approach proved its ability at reproducing the analytic and synthetic test cases. Moreover, simulation results of the real flood event showed its suitability at identifying areas affected by flooding, which were verified against those recorded after the event by local authorities.

  18. 40 CFR 171.11 - Federal certification of pesticide applicators in States or on Indian Reservations where there is...

    Science.gov (United States)

    2010-07-01

    ... pass/no fail written questionnaire or a workbook, receipt of a passing grade in an approved course... specified in (d)(1) (i) of this section, or by passing an oral examination approved by the Administrator and... public health, interest or welfare warrants immediate action to suspend the certificate; (ii) Notify...

  19. Project CHOICE: #171. A Career Unit for Grades K-2. The Supermarket. (Marketing and Distribution Occupations Career Cluster).

    Science.gov (United States)

    Kern County Superintendent of Schools, Bakersfield, CA.

    This teaching unit on the supermarket is part of the Marketing and Distribution Occupations Career Cluster included in a series of career guidebooks developed by Project CHOICE (Children Have Options in Career Education). The units are designed to provide the classroom teacher with a source of career-related activities linking first and second…

  20. Homologación de soldadores y procesos bajo el código AWS D17.1

    OpenAIRE

    Gaona Latorre, Mireia

    2015-01-01

    Los fabricantes de motores aeronáuticos exigen a las organizaciones de mantenimiento que dispongan de soldadores homologados para realizar reparaciones en los componentes. Los certificados de homologación son la mejor garantía de que los soldadores poseen la destreza y conocimientos necesarios para realizar trabajos de soldadura. Estas homologaciones se realizan tanto a los soldadores que emplean métodos manuales como a operadores de máquinas de soldeo. Este proyecto está dividido en dos p...

  1. 25 CFR 171.600 - What information is collected and retained on the irrigation service I receive?

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false What information is collected and retained on the....600 What information is collected and retained on the irrigation service I receive? We will collect and retain at least the following information as part of our record of the irrigation service we...

  2. AN/GRC-171 Rivet Switch Multichannel UHF/AM Transceiver Demonstrated Mean Time Between Failure (DMTBF)

    Science.gov (United States)

    1976-07-22

    f)7 Pretn~red by:YHQhterIt J./nvares) 11,t, USAF -AFLC/ CR7PA Approved b olJRRowlan J10 R. F~J, ~oe, z ’ Directorulte o.’ -,31 Manolsemaout... GEERATOR AND CONNECT RF LOAD PRIOR TO PERFORMING TRANSMITTM TESTS 11. APPENDIX 11 6.2 TRANSMITTER POWER OUTPUT Remove the audio input signal. Key the...clause shall be final and shall not be subject to the "Disputes" clause of this contract. 21. 64- VI z " ’ C" 1. 00 n w AvS L Z 4. TEST RESULTS 4.1

  3. 19 CFR Appendix B to Part 171 - Customs Regulations, Guidelines for the Imposition and Mitigation of Penalties for Violations of...

    Science.gov (United States)

    2010-04-01

    ... customary domestic value assessment. In all section 592 cases of this nature regardless of the dollar amount... cooperation justifying mitigation inasmuch as Customs has the right to examine an importer's books and records... of the violation to an extent over and above customary brokerage fees, the customs broker will be...

  4. Heterometallic octanuclear RE(III)3Ni(II)5 (RE = Dy(III), Gd(III) and Y(III)) clusters with slow magnetic relaxation for the dysprosium derivative.

    Science.gov (United States)

    Wang, Huiyu; Ke, Hongshan; Lin, Shuang-Yan; Guo, Yang; Zhao, Lang; Tang, Jinkui; Li, Yun-Hui

    2013-04-21

    Reactions of rare earth benzoate and nickel perchlorate with a Schiff-base ligand, 2-([(2-hydroxyphenyl)imino]methyl) phenol (H2L), in the presence of triethylamine yielded three heterobimetallic octanuclear clusters of general formula [RE3Ni5L5(PhCOO)3(μ3-OH)5(μ3-OCH3)(CH3OH)4(H2O)]·xCH3OH·yH2O (RE = Dy(III), x = 4, y = 4 (1), RE = Gd(III), x = 5, y = 4 (2), RE = Y(III), x = 5, y = 3 (3)). Single-crystal X-ray diffraction reveals that the metal core of each cluster consists of two distorted [RE2Ni2O4] cubane-like moieties and a heterobimetallic triangular [RE2NiO2] unit, with RE ions arranged in a typical triangular fashion. Variable-temperature solid state magnetic susceptibilities of these complexes were measured in the temperature range 2-300 K and the results indicate that an overall ferromagnetic interaction among the metal ions is operative for compounds 2 and 3. Under zero external field, the Dy3Ni5 compound shows a frequency dependence of the out-of-phase (χ'') signals, which indicates slow relaxation of the magnetization.

  5. Poly[(6-carboxypicolinato-κ3O2,N,O6(μ3-pyridine-2,6-dicarboxylato-κ5O2,N,O6:O2′:O6′dysprosium(III

    Directory of Open Access Journals (Sweden)

    Xu Li

    2009-11-01

    Full Text Available In the title complex, [Dy(C7H3NO4(C7H4NO4]n, one of the ligands is fully deprotonated while the second has lost only one H atom. Each DyIII ion is coordinated by six O atoms and two N atoms from two pyridine-2,6-dicarboxylate and two 6-carboxypicolinate ligands, displaying a bicapped trigonal-prismatic geometry. The average Dy—O bond distance is 2.40 Å, some 0.1Å longer than the corresponding Ho—O distance in the isotypic holmium complex. Adjacent DyIII ions are linked by the pyridine-2,6-dicarboxylate ligands, forming a layer in (100. These layers are further connected by π–π stacking interactions between neighboring pyridyl rings [centroid–centroid distance = 3.827 (3 Å] and C—H...O hydrogen-bonding interactions, assembling a three-dimensional supramolecular network. Within each layer, there are other π–π stacking interactions between neighboring pyridyl rings [centroid–centroid distance = 3.501 (2 Å] and O—H...O and C—H...O hydrogen-bonding interactions, which further stabilize the structure.

  6. 10 CFR 33.100 - Schedule A.

    Science.gov (United States)

    2010-01-01

    ... .1 Cesium-137 .1 .001 Chlorine-36 1 .01 Chlorine-38 100 1. Chromium-51 100 1. Cobalt-57 10 0.1 Cobalt-58m 100 1. Cobalt-58 1 .01 Cobalt-60 .1 .001 Copper-64 10 .1 Dysprosium-165 100 1. Dysprosium-166...

  7. Study on Magnetic Responsibility of Rare Earth Ferrite/Polyacrylamide Magnetic Microsphere

    Institute of Scientific and Technical Information of China (English)

    Zhang Ming; Wang Zhifeng; Zhang Hong; Dai Shaojun; Qiu Guanming; Okamoto Hiroshi

    2005-01-01

    In inverse microemulsion, rare earth ferrite/polyacrylamide magnetic microsphere were prepared and their magnetic responsibility were studied by magnetic balance. Results indicate that the magnetic responsibility of microsphere relates to magnetic moment of rare earth ion, and it can be improved by the addition of dysprosium ion of high magnetic moment. Dysprosium content has an effect on magnetic responsibility of dysprosium ferrite/polyacrylamide magnetic microsphere. The microsphere displays strong magnetic responsibility when the molar ratio of Dy3+/iron is 0.20.

  8. Poly[hexaaquatri-μ-malonato-didysprosium(III

    Directory of Open Access Journals (Sweden)

    Mei Yang

    2008-07-01

    Full Text Available The title compound, [Dy2(C3H2O43(H2O6]n, forms a coordination polymeric structure comprising hydrated dysprosium ions and malonate ligands. In the asymmetric unit, there are one dysprosium ion, one and a half malonate ligands, and three water molecules. Each DyIII atom is coordinated by six O atoms from four malonate ligands and by three water molecules, and displays a tricapped trigonal–prismatic coordination geometry. The malonate ligands adopt two types of coordination mode, linking dysprosium centres to form a three-dimensional coordination polymer. The extensive network of hydrogen bonds in this polymer enhances the structural stability.

  9. A Thermally Actuated Flux Pump for Energizing YBCO Pucks

    Science.gov (United States)

    2016-05-01

    antiferromagnetic, so heat pulses that go above and below 85 K should create a wave of magnetism across the face of the YBCO puck. The YBCO and dysprosium...temperature sensors were located at the centre and the outer perimeter on the surface of the dysprosium closest to the cold head, and on the side of the YBCO...outer perimeter of the dysprosium, the edge of the YBCO and the coldhead. In the following figures various curves are removed to give a clear picture of

  10. Erratum to 'Collective and intrinsic structures in sup 1 sup 8 sup 3 W' [Nucl. Phys. A 660 (1999) 171-196

    CERN Document Server

    Saitoh, T R; Sletten, G; Bark, R A; Bergström, M H; Regan, P; Toermaenen, S; Varmette, P G; Walker, P M; Wheldon, C

    2000-01-01

    The structure of sup 1 sup 8 sup 3 W has been studied by employing the sup 1 sup 7 sup 6 Yb( sup 1 sup 4 C,alpha 3n) reaction at 68 MeV. Five previously known rotational structure with one-quasiparticle configurations have been extended to higher spin states, and five new rotational bands with three- and five-quasiparticle configurations and a gamma-vibration of a one-quasiparticle structure have been newly identified. In the nu 7/2 sup - [503] and nu 11/2 sup + [615] rotational structures, a signal of an admixture of an octupole-vibrational structure has been observed in their in-band B(M1)/B(E2) ratios and g sub K factors. In the K suppi=19 sup - rotational band, a Coriolis effect on the nu 1/2 sup - [510] neutron has been identified. In all, 17 K-forbidden transitions have been observed. Energies of intrinsic states below 4 MeV have been calculated based on the Blocked BCS theory, and they are used in support of the configuration assignments.

  11. Erratum to 'Collective and intrinsic structures in {sup 183}W' [Nucl. Phys. A 660 (1999) 171-196

    Energy Technology Data Exchange (ETDEWEB)

    Saitoh, T.R.; Saitoh-Hashimoto, N.; Sletten, G.; Bark, R.A.; Bergstroem, M.; Regan, P.; Toermaenen, S.; Varmette, P.G.; Walker, P.M.; Wheldon, C

    2000-04-24

    The structure of {sup 183}W has been studied by employing the {sup 176}Yb({sup 14}C,{alpha}3n) reaction at 68 MeV. Five previously known rotational structure with one-quasiparticle configurations have been extended to higher spin states, and five new rotational bands with three- and five-quasiparticle configurations and a {gamma}-vibration of a one-quasiparticle structure have been newly identified. In the {nu}7/2{sup -}[503] and {nu}11/2{sup +}[615] rotational structures, a signal of an admixture of an octupole-vibrational structure has been observed in their in-band B(M1)/B(E2) ratios and g{sub K} factors. In the K{sup {pi}}=19{sup -} rotational band, a Coriolis effect on the {nu}1/2{sup -}[510] neutron has been identified. In all, 17 K-forbidden transitions have been observed. Energies of intrinsic states below 4 MeV have been calculated based on the Blocked BCS theory, and they are used in support of the configuration assignments.

  12. CRED Subsurface Temperature Recorder (STR); NWHI, LAY; Long: -171.73891, Lat: 25.77957 (WGS84); Sensor Depth: 1.22m; Data Range: 20060911-20070411.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Subsurface Temperature Recorders (STR) provide a time series of...

  13. CRED Subsurface Temperature Recorder (STR); AMSM, SWA; Long: -171.09092, Lat: -11.05855 (WGS84); Sensor Depth: 14.00m; Data Range: 20060211-20080116.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Subsurface Temperature Recorders (STR) provide a time series of...

  14. CRED Subsurface Temperature Recorder (STR); AMSM, SWA; Long: -171.09120, Lat: -11.05873 (WGS84); Sensor Depth: 28.00m; Data Range: 20060211-20070630.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Subsurface Temperature Recorders (STR) provide a time series of...

  15. CRED Subsurface Temperature Recorder (STR); AMSM, SWA; Long: -171.09121, Lat: -11.05861 (WGS84); Sensor Depth: 28.96m; Data Range: 20080316-20090702.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Subsurface Temperature Recorders (STR) provide a time series of...

  16. http://sjm06.com/SJM%20ISSN1452-4864/9_2_2014_November_145-292/9_2_2014_159_171.pdf

    Directory of Open Access Journals (Sweden)

    Ildikó Marosi

    2014-10-01

    Full Text Available There are explicit, as well as tacit expectations among skills and competencies that are demanded from those newly graduated. My main question of interest is the following: Where do young people learn these skills, knowledge and experience? Present paper is based on literature review and a quantitative research which was conducted among university students aged 18-33, in autumn 2013. The findings prove that a significant part of tacit knowledge is gained through family socialisation, during the process of informal learning rather than via formal education. Hence, family socialisation affects the competence portfolio of young graduates immensely. Present paper endeavours to investigate this influence.

  17. Erratum to "Rayleigh scattering cross-section measurements of nitrogen, argon, oxygen and air" J Quant Spectrosc Radiat Transf 147 (2014) 171-177

    Science.gov (United States)

    Thalman, Ryan; Zarzana, Kyle J.; Tolbert, Margaret A.; Volkamer, Rainer

    2017-03-01

    Tables 1 and 2 of the published material [1] contain a series of typographical errors. In Table 1 the exponent of the B term for N2 was corrected to 1012 and ν for the two N2 cases should be ν2 for the King correction factor. In Table 2 the units are (cm2×1027), the N2 calculation at 660.0 nm is 2.21×10-27 cm2 and the O2 calculation at 532.2 nm is 4.66×10-27 cm2.

  18. Role of Community and Technical Colleges in Producing Nursing Graduates: Rethinking the Pipeline for Guided Pathways. Research Report 17-1

    Science.gov (United States)

    Washington State Board for Community and Technical Colleges, 2017

    2017-01-01

    Though it is still possible to enter the nursing profession with a Licensed Practical Nursing Certificate (LPN) or an Associate's Degree in Nursing (ADN), it is becoming increasingly necessary to get a Bachelor of Science in Nursing (BSN) in order to be assured of continued employment. The Associate in Applied Science-T Nursing Degree prepares…

  19. Severe alcohol withdrawal syndrome: Evolution of care and impact of adjunctive therapy on course and complications of 171 intensive care unit patients.

    Science.gov (United States)

    Puscas, Mircea; Hasoon, Mohammed; Eechevarria, Carlos; Cooper, Tracy; Tamura, Leslie; Chebbo, Ahmad; W Carlson, Richard

    2016-01-01

    This single site retrospective observational study assessed the evolution of sedation therapy for severe alcohol withdrawal syndrome in the intensive care unit. Patient records for 2 intervals were reviewed: Interval 1, which included 87 intensive care unit patients admitted January 2005 through September 2007, for whom benzodiazedpine monotherapy was utilized; and Interval 2, January 2010 through December 2010, for whom 54 of 84 (64.3%) intensive care unit patients, including all those intubated, received adjunctive agents, including dexmedetomidine or propofol. Clinical management was similar for both intervals, as well as prevalence of alcohol withdrawal syndrome versus total adult hospital admissions and comorbid conditions. Overall, respiratory failure (53 versus 39%), seizures (36 versus 18%), and pneumonia (51 versus 38%) were less frequent during Interval 2 (all p care unit admission are excluded, the prevalence of these complications was similar (p = ns) for Interval 1 and Interval 2. Intensive care unit and hospital length of stay were not altered by adjunctive therapy, which was typically employed for more severely affected patients. High intensity sedation with adjunctive drugs led to few cardiovascular adverse events and may have facilitated management, but did not alter intensive care unit course of severe alcohol withdrawal syndrome.

  20. [A questionnaire study among 171 medical candidates enrolled in a PhD program. Three elements in the PhD education: supervision, research courses and international relations].

    Science.gov (United States)

    Hauge, E M; Grønbaek, H

    1998-11-02

    One hundred and seventy-one medical doctors (median age 34 years) registered as Ph.D.-students at the Medical Faculty, University of Aarhus, were given a questionnaire concerning the Ph.D-program (91% reply rate). The Ph.D.-students had typically graduated four years before enrollment and had gained basic clinical experience. Eighty-four percent had been involved in research projects prior to their formal research education. In general, the Ph.D.-students found the supervision offered by senior researchers adequate, although, more Ph.D.-students in clinical than in preclinical departments would have liked their main supervisor to be more enthusiastic and have more specific expertise. By tradition, the Medical Faculty in Aarhus offers a broad introductory course on research methodology, this was appreciated by the Ph.D.-students. However, they found that too much time was allocated for this purpose. The Ministry of Education recommends that Ph.D.-students gain experience from international collaboration, preferably from a stay abroad. However, only 24% of Ph.D.-students had stayed at an international collaborating institution. Although the overall evaluation of the medical Ph.d.-program was positive, the Ph.D.-students pointed out weaknesses and conflicts requiring adjustment.

  1. SY 17-1 DYNAMIC REGULATION OF REDOX REGULATING FACTOR APE1/REF-1 ON THE OXIDATIVE STRESS AND VASCULAR INFLAMMATION.

    Science.gov (United States)

    Jeon, Byeong Hwa

    2016-09-01

    Apurinic/apyrimidinic endonuclease 1/redox factor-1 (APE1/Ref-1) is a multifunctional protein that plays a central role in the cellular response to DNA damage and redox regulation against oxidative stress. APE1/Ref-1 is essential for cellular survival and embryonic lethal in knockout mouse models. Heterozygous APE1/Ref-1 mice showed impaired endothelium-dependent vasorelaxation, reduced vascular NO levels, and are hypertensive. APE1/Ref-1 reduces intracellular reactive oxygen species production by negatively regulating the activity of the NADPH oxidase. APE1/Ref-1 is predominantly localized in the nucleus; however, its subcellular localization is dynamically regulated. Recently, it was shown that APE1/Ref-1 is secreted in response to hyperacetylation at specific lysine residues. We investigated the functions of extracellular APE1/Ref-1 with respect to leading anti-inflammatory signaling in TNF-α-stimulated endothelial cells in response to acetylation. Trichostatin A (TSA), an inhibitor of histone deacetylase, considerably suppressed vascular cell adhesion molecule-1 (VCAM-1) in TNF-α-stimulated endothelial cells. During TSA-mediated acetylation in culture, a time-dependent increase in secreted APE1/Ref-1 was confirmed. Recombinant human APE1/Ref-1 with reducing activity induced a conformational change in TNFR1 by thiol-disulfide exchange. Following treatment with the neutralizing anti-APE1/Ref-1 antibody, inflammatory signals via the binding of TNF-α to TNFR1 were remarkably recovered. Furthermore, rhAPE1/Ref-1 inhibited IL-1β-induced VCAM-1 expression in endothelial cells, and it inhibited iNOS or COX-2 expression in lipopolysaccharide-stimulated RAW 264.7 macrophage cells. These results strongly indicate that anti-inflammatory effects of secreted APE1/Ref-1 and its property of secreted APE1/Ref-1 may be useful as a therapeutic biomolecule in cardiovascular disease.

  2. DyP, a unique dye-decolorizing peroxidase, represents a novel heme peroxidase family: ASP171 replaces the distal histidine of classical peroxidases.

    Science.gov (United States)

    Sugano, Yasushi; Muramatsu, Riichi; Ichiyanagi, Atsushi; Sato, Takao; Shoda, Makoto

    2007-12-14

    DyP, a unique dye-decolorizing enzyme from the fungus Thanatephorus cucumeris Dec 1, has been classified as a peroxidase but lacks homology to almost all other known plant peroxidases. The primary structure of DyP shows moderate sequence homology to only two known proteins: the peroxide-dependent phenol oxidase, TAP, and the hypothetical peroxidase, cpop21. Here, we show the first crystal structure of DyP and reveal that this protein has a unique tertiary structure with a distal heme region that differs from that of most other peroxidases. DyP lacks an important histidine residue known to assist in the formation of a Fe4+ oxoferryl center and a porphyrin-based cation radical intermediate (compound I) during the action of ubiquitous peroxidases. Instead, our tertiary structural and spectrophotometric analyses of DyP suggest that an aspartic acid and an arginine are involved in the formation of compound I. Sequence analysis reveals that the important aspartic acid and arginine mentioned above and histidine of the heme ligand are conserved among DyP, TAP, and cpop21, and structural and phylogenetic analyses confirmed that these three enzymes do not belong to any other families of peroxidase. These findings, which strongly suggest that DyP is a representative heme peroxidase from a novel family, should facilitate the identification of additional new family members and accelerate the classification of this novel peroxidase family.

  3. SU-E-J-171: Evaluation of Cervical Spine and Mandible Reproducibility of the CDR Mayo Mold and Civco Type-S Head and Neck Immobilization Systems.

    Science.gov (United States)

    Chungbin, S

    2012-06-01

    To evaluate the cervical spine (c-spine) and mandible reproducibility of the CDR Mayo Mold and Civco Type-S head and neck immobilization system using Mosaiq Setup Intelligence Curve Image Registration Methods: Patients were immobilized with either the Mayo Mold or Civco Type-S head and neck immobilization systems. Using curve image registration tools in Mosaiq, the c-spine and mandible were outlined. For each lateral image, two separate image registrations were performed using an initial kV image as reference - 1) c-spine only 2) mandible only. To evaluate the relative difference between the c-spine and mandible position, the mandible image registration results were subtracted from the c-spine image registration results. To evaluate whether the initial difference between the planning CT and the first kV setup image is larger than subsequent daily imaging variations, the difference in the image registration of the DRR was compared to the variation in subsequent image registrations. The degree of neck flexion was determined by observing the amount of mismatch between the upper and lower cervical spine after the pitch correction. During the first weeks of treatment, there was minimal difference in the image registration results for both the c-spine and mandible individually, and in the relative difference between them. For neck flexion, the Mayo Mold system demonstrated 82.6% minimal difference and 3.8% significant difference between the alignment of upper and lower c spine, vs. 84% and 5.2% for the S frame. For some patients, there is a greater difference between the DRR and the initial kV image registration than the variation in registrations for subsequent daily imaging. Preliminary results indicate minimal difference in the c-spine and mandible reproducibility between the two immobilization systems during the first weeks of treatment. Further analysis of whether this minimal difference remains consistent throughout the entire course and treatment and with greater number of patients is needed. © 2012 American Association of Physicists in Medicine.

  4. 19 CFR Appendix D to Part 171 - Guidelines for the Imposition and Mitigation of Penalties for Violations of 19 U.S.C. 1593a

    Science.gov (United States)

    2010-04-01

    ...) Issuance of Prepenalty Notice. As provided in § 162.77a of the Customs Regulations (19 CFR 162.77a), if... mitigation inasmuch as Customs has the right to examine an importer's books and records pursuant to 19 U.S.C... current financial information must be provided on the shareholders, wherever they are located. (f)...

  5. CRED Subsurface Temperature Recorder (STR); NWHI, LAY; Long: -171.74250, Lat: 25.77240 (WGS84); Sensor Depth: 3.30m; Data Range: 20050613-20060910.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Subsurface Temperature Recorders (STR) provide a time series of...

  6. 171例创伤门诊慢性伤口分泌物病原菌培养及耐药性分析

    Institute of Scientific and Technical Information of China (English)

    唐琼芳; 戴薇薇; 田含章; 张其健

    2016-01-01

    目的:分析创伤门诊慢性伤口感染病原菌的分布及其耐药性,以准确评估伤口情况,为临床合理使用抗生素或银离子敷料治疗感染慢性伤口及减少耐药菌产生提供科学依据。方法回顾性分析本院伤口造口护理中心2013年7月~2014年12月创伤门诊慢性伤口分泌物标本病原菌培养和耐药性试验结果,应用软件WHONET进行统计学分析。结果创伤门诊慢性伤口病原菌培养阳性率58.48%,耐药率54.10%。金黄色葡萄球菌和大肠埃希菌检出率最高(22.95%和21.31%),耐药率分别为46.43%、69.23%。鲍曼不动杆菌100.00%耐药。各伤口部位感染率从高到低依次为上肢,骶尾部,下肢和颊部。不愈性手术伤口分泌物细菌培养阳性率为48.5%,其中金黄色葡萄球菌构成比为38.8%,包括2例耐甲氧西林金黄色葡萄球菌(MASA)感染。结论创伤门诊慢性伤口病原菌感染率和耐药率较高,临床医务工作者应加强无菌操作观念,避免医源性交叉感染,针对慢性伤口应及时行细菌培养和药敏试验以明确诊断和改进换药策略。%Objective To analyze the distribution and drug resistance of pathogenic bacteria in traumatic outpatient chronic wound infection, and to provide scientiifc evidence for clinical rational use of antibiotics or silver ion dressing in treating chronic wounds and reducing drug resistance. Methods The pathogenic bacteria culture and drug resistance of chronic wounds in a hospital traumatic outpatient from July 2013 to December 2014, and the results of drug resistance test were retrospectively analyzed. The software WHONET was used for statistical analysis. Results The culture-positive rate of pathogenic bacteria was 58.48%, and the detection rate of antibiotic-resistant bacteria was 54.10%. The top two pathogenic of positive rate were Staphylococcus aureus and Escherichia coli (22.95%and 21.31%, respectively), antibiotic-resistant bacteria account for 46.43%and 69.23%, respectively. All the Bauman Acinetobacter were antibiotic-resistant. The infection rate of different wound locations were as follows:upper extremity, sacrococcygeal, lower extremity, pars buccalis. The positive rate of bacterial culture was 38.8%, the composition ratio of Staphylococcus aureus was 48.5%, including 2 cases of Staphylococcus aureus (MASA) infection. Conclusion The infection rate and drug resistance rate of chronic wounds are high, the clinical medical workers should strengthen the aseptic operation concept to avoid iatrogenic cross-infection. In order to make a clear diagnosis and improve the dressing change strategy, the bacterial culture and drug sensitivity test should be performed in time.

  7. Corrigendum to ''Climate-mediated changes in zooplankton community structure for the eastern Bering Sea'' [Deep-Sea Res. II 109 (2014) 157-171

    Science.gov (United States)

    Eisner, L. B.; Napp, J. M.; Mier, K. L.; Pinchuk, A. I.; Andrews, A. G.

    2016-10-01

    The authors regret that the panels are mislabelled in the caption for Fig. 7. The caption should read, "Untransformed mean zooplankton abundances in the eastern Bering Sea for large taxa in the (A) north (~60-63°N) and (B) south (<~60°N) and for small taxa in the (C) north and (D) south. Bar indicates warm and cold regimes".

  8. CRED Subsurface Temperature Recorder (STR); NWHI, LAY; Long: -171.73890, Lat: 25.77954 (WGS84); Sensor Depth: 1.21m; Data Range: 20040924-20060910.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Subsurface Temperature Recorders (STR) provide a time series of...

  9. Polymer Based Molecular Composites. Volume 171. Materials Research Society Symposium Proceedings Held in Boston, Massachusetts on 27-30 November 1989

    Science.gov (United States)

    1990-09-01

    Am. Chem. Soc. 10, 4507 (1983). 48. P. Tundo, D. J. Kippenberger, P. L. Klahn, N. E. Prieto , T. C. Jao, J. H. Fendler, J. Am. Chem. Soc. 104, 456...shownii i Fig. 1. 0 0 20 40 60 80 100 120 140 160 180 TemperatUre (’C) Fig. I DSC thiermiogr’li of sonie seiiitiiorimitei it ; alanes SCedi ;it ;I i t

  10. 12 CFR 225.171 - What are the limitations on managing or operating a portfolio company held as a merchant banking...

    Science.gov (United States)

    2010-01-01

    ... routine business decisions, such as entering into transactions in the ordinary course of business or...) of the Bank Holding Company Act (12 U.S.C. 1843(k)(4)(I)); (4) A small business investment company (as defined in section 302(b) of the Small Business Investment Act of 1958 (15 U.S.C....

  11. Maximum Permissible Concentrations and Negligible Concentrations for Rare Earth Elements (REEs)

    NARCIS (Netherlands)

    Sneller FEC; Kalf DF; Weltje L; Wezel AP van; CSR

    2000-01-01

    In dit rapport worden maximaal toelaatbare risiconiveaus (MTR) en verwaarloosbare risiconiveaus (VR) afgeleid voor zeldzame aardmetalen (ZAM). De geselecteerde ZAMs zijn Yttrium (Y), Lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Samarium (Sm), Gadolinium (Gd), en Dysprosium (Dy

  12. Atomic physics: A strange kind of liquid

    Science.gov (United States)

    Laburthe-Tolra, Bruno

    2016-11-01

    Interactions between the magnetic dipoles of dysprosium atoms in an ultracold gas can produce a 'self-bound' droplet. This provides a useful isolated system for probing the quantum-mechanical properties of ultracold gases. See Letter p.259

  13. China Rare Earth Market Review

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    @@ Active demands from downstream industry drove the price rise of rare earth products in Chinese domestic marketrecently, particularly didymium and dysprosium products. Prices of other rare earth products remained stable.

  14. Luminescence investigation of Dy2O2S and Dy2O2SO4 obtained by thermal decomposition of sulfate hydrate

    Institute of Scientific and Technical Information of China (English)

    RV Rodrigues; L Marciniak; LU Khan; JR Matos; HF Brito; W Strk

    2016-01-01

    The yellow emitting dysprosium oxysulfide (Dy2O2S) and dysprosium oxysulfate (Dy2O2SO4) compounds were prepared from the thermal decomposition of hydrated dysprosium sulphate. The materials were characterized by using thermogravimetry (TG/DTG), X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) and Raman spectroscopies. The thermal stability temperatures at around 1151 and 1313 K were determined for the Dy2O2S and Dy2O2SO4 materials, respectively. The photolumines-cence properties of the dysprosium oxysulfide were investigated, showing narrow emission bands assigned to the 4F9/2→6HJ intracon-figurational transitions of the Dy3+ion. The yellow emission color of this phosphor suggests that the Dy2O2S is a promising material for applications in LEDs.

  15. Evidence from Students’ Information Seeking Diaries Underscores the Importance of Including Librarians in Undergraduate Education. A Review of: Lee, J. Y., Paik, W., & Joo, S. (2012. Information resource selection of undergraduate students in academic search tasks. Information Research, 17(1, paper511. Retrieved 8 Aug., 2012 from http://informationr.net/ir/17-1/paper511.html

    Directory of Open Access Journals (Sweden)

    Maria Melssen

    2012-12-01

    Full Text Available Objective – To determine what informationresources undergraduate students choose tocomplete assignments for their courses, whythey choose those resources, the process ofselecting those resources and the factors thatcontributed to selecting the resources, andtheir perceptions of those resources.Design – Semi-structured information seekingdiary.Setting – Private university in Seoul, Korea.Subjects – 233 undergraduate students fromall majors and all years.Methods – Students selected one assignmentfrom their elective course and recorded thefollowing in a diary: what the assignment was,the topic they needed to research to completethe assignment, resources used, the factors thatcontributed to choosing the resources, andperceptions of those resources.Main Results – Data were analyzed bothqualitatively and quantitatively. The factorsthat affected the students’ resource selectionwere analyzed qualitatively using an opencoding method created by the researchers. Thefactors were not predetermined by theresearchers, but were selected based on thefactors identified by the students. Onlineresources (67.1% were the most frequentlyselected resources by the students compared tohuman resources (11.5%, print materials (11.5%, and mass media (3%. Students used an average of 5.28 resources to complete one assignment. Factors that affected the students’ selection of resources were the type of information provided by the resource, the features of the resource, the search strategy used when searching in the resource, and the students’ interaction with other people when selecting and using the resource. More than one factor typically contributed to the students’ selection of the resource. The students’ perceptions of the resources they selected were analyzed quantitatively: perceptions were analyzed in six content areas using a five point scale. Correlations and similarities across the six content areas were also analyzed. Perceptions of resources were broken down into six categories and the resources were rated on a five point scale. Librarians (4.50 were the most useful resource and lecture notes (5.0 were the most credible. Family (3.29 was the least useful, and social question and answer services, such as Yahoo! Answers, (2.62 were the least credible. Family was the most accessible and familiar resource (4.90 and 4.95 respectively. Experts (2.25 were least accessible and librarians (1.50 were the least familiar. Students were most satisfied with Google Scholar (4.33 and were most likely to use an online database (4.52 again. They were least satisfied with social question and answer services (3.05 and least likely to use a report sharing site (2.93 again. The usefulness and credibility of the resource contributed most to the undergraduates’ satisfaction with the resource, while accessibility and usefulness were the major contributing factors to users intended continued use of a resource.Conclusion – There are multiple reasons that support further information literacy education. Information literacy courses would encourage and teach students how to effectively use resources that they found credible and reliable, but considered inaccessible and unfamiliar. Information literacy education would also help educate students on how to best formulate their search strategies and how to select the best resource to use based on that strategy. Students also highlighted the importance of human interaction in resource selection and utilization. This is an opportunity for librarians and professors to play a more active role in assisting students in selecting and using the best resources to complete course assignments. Due to the limitations of this study, further research is needed to investigate the factors affecting the exclusion of resources, not only the inclusion. Future study designs should address the characteristics of the study participants themselves, such as the age and gender. The impact of the research topic and subject on resource selection, as well as what resources are selected for non-academic information needs, should also be investigated.

  16. 汉语新词语修辞造词分析——以“171条新词语”为例%An Analysis of the Rhetorical Word Formation for the Chinese New Words:Illustrated by 171 New Words

    Institute of Scientific and Technical Information of China (English)

    段曹林; 曾翠媚

    2012-01-01

    The analysis of the rhetorical word formation for the new words has gradually manifested manifold meanings and values,but the rhetorical word formation enjoys a weak theoretical base,and its analytical pattern is far less mature,so a lot of problems have occurred in the past discussions of the rhetorical word formation.The problem is mainly reflected in that about the rhetorical word formation and other word formation,specific content of the rhetoric word formation,it has not a clear distinction.In response to the current situation,it is necessary to establish the classification system based on analysis to all rhetorical method.To take the rhetorical + non rhetorical analysis mode should have a certain operability.%新词语修辞造词分析日益彰显出多方面的意义和价值,但修辞造词理论基础薄弱,修辞造词分析模式尚不成熟,导致以往的修辞造词分析存在不少问题。问题主要体现在对修辞造词法和其他造词法以及修辞造词的具体构成没有做出明确的区分。针对这一现状,建立以全部修辞方法的分析为对象和基础的分类体系十分必要,采取"辞格+非辞格"的分析模式具有一定的可操作性。

  17. Millennial Generation Students Search the Web Erratically, with Minimal Evaluation of Information Quality. A Review of: Taylor, A. (2012. A study of the information search behaviour of the millennial generation. Information Research, 17(1, paper 508. Retrieved from http://informationr.net/ir/17-1/paper508.html

    Directory of Open Access Journals (Sweden)

    Dominique Daniel

    2013-03-01

    Full Text Available Objective – To identify how millennial generation students proceed through the information search process and select resources on the web; to determine whether students evaluate the quality of web resources and how they use general information websites.Design – Longitudinal study.Setting – University in the United States.Subjects – 80 undergraduate students of the millennial generation enrolled in a business course.Methods – The students were required to complete a research report with a bibliography in five weeks. They also had to turn in interim assignments during that period (including an abstract, an outline, and rough draft. Their search behaviour was monitored using a modified Yahoo search engine that allowed subjects to search, and then to fill out surveys integrated directly below their search results. The students were asked to indicate the relevance of the resources they found on the open web, to identify the criteria they used toevaluate relevance, and to specify the stage they were at in the search process. They could choose from five stages defined by the author, based on Wilson (1999: initiation, exploration, differentiation, extracting, and verifying. Datawere collected using anonymous user IDs and included URLs for sources selected along with subject answers until completion of all assignments. The students provided 758 distinct web page evaluations.Main Results – Students did not progress in orderly fashion through the search process, but rather proceeded erratically. A substantial number reported being in fewer than four of the five search stages. Only a small percentage ever declared being in the final stage of verifying previously gathered information, and during preparation of the final report a majority still declared being in the extracting stage. In fact, participants selected documents (extracting stage throughout the process. In addition, students were not much concerned with the quality, validity, or authority of their sources, reporting that the main criteria they used to evaluate a web resource were its understandability, the amount of information in the source, its accuracy, and its recency. During the last stage of the assignment the main criteria were understandability and the amount of information. Finally, students used general information websites like Wikipedia throughout the process, but especially while preparing the final report.Conclusion – The search behaviour of millennial students does not conform to existing search models. The models are appropriate but the execution of these models by students is problematic. Students gathered documents, including general websites like Wikipedia, through all stages of the assignment, including the preparation of the final report. They are likely to procrastinate and do some backfilling. Furthermore they show little concern for the validity of sources: very few verified their sources and quality of the information gathered was not a priority for them. Those findings point to a problem of perception rather than a lack of information search skills: millennial students know how to search and filter, but they do not believe that there is an objective standard to evaluate information and they have a non-critical view of information. More research about the causes of such perception should help us identify effective strategies to help students improve their searches.

  18. Syntheses, structures, and magnetic properties of a family of tetranuclear hydroxido-bridged Ni(II)2Ln(III)2 (Ln = La, Gd, Tb, and Dy) complexes: display of slow magnetic relaxation by the zinc(II)-dysprosium(III) analogue.

    Science.gov (United States)

    Abtab, Sk Md Towsif; Maity, Manoranjan; Bhattacharya, Kisholoy; Sañudo, E Carolina; Chaudhury, Muktimoy

    2012-10-01

    A new family of [2 × 2] tetranuclear 3d-4f heterometallic complexes have been synthesized. These are [Zn(2)Dy(2)L(2)(μ(3)-OH)(2)(μ(4)-OH)(dbm)(2)(MeOH)(2)](NO(3))·2H(2)O·MeOH (3), [Ni(2)Dy(2)L(2)(μ(3)-OH)(2)(μ(4)-OH)(dbm)(2)(MeOH)(2)](NO(3))·MeOH (4), [Ni(2)La(2)L(2)(μ(3)-OH)(2)(μ(4)-OH)(dbm)(2)(MeOH)(2)](ClO(4))·H(2)O·2MeOH (5), [Ni(2)Tb(2)L(2)(μ(3)-OH)(2)(μ(4)-OH)(dbm)(2) (MeOH)(2)](NO(3))·MeOH (6), and [Ni(2)Gd(2)L(2)(μ(3)-OH)(2)(μ(4)-OH)(dbm)(2)(MeOH)(2)](NO(3))·MeOH (7), [H(2)L = N,N'-dimethyl-N,N'-bis(2-hydroxy-3,5-dimethylbenzyl)ethylenediamine and Hdbm = dibenzoylmethane] obtained through a single-pot synthesis using [Zn(HL)(dbm)] (for 3)/[Ni(HL)(dbm)]·2CH(3)OH (for 4, 5, 6, and 7) as 3d-metal ion precursors. Single-crystal X-ray diffraction analysis and electrospray ionization (ESI) mass spectroscopy have been used to establish their identities. Compounds are isostructural, in which the metal ions are all connected together by a bridging hydroxido ligand in a rare μ(4)-mode. In complexes 3-7, the metal ions are antiferromagnetically coupled. Taking a cue from the results of 3 and 5, precise estimations have been made for the antiferromagnetic Ni···Ni (J(Ni) = -50 cm(-1)), Ni···Gd (J(NiGd) = -4.65 cm(-1)), and Gd···Gd (J(Gd) = -0.02 cm(-1)) exchange interactions in 7, involving the gadolinium(III) ions. The Zn(II)(2)Dy(III)(2) compound 3 has shown the tail of an out-of-phase signal in alternating current (AC) susceptibility measurement, indicative of slow relaxation of magnetization. Interestingly, the Ni(II)(2)Dy(III)(2) compound 4 in which both the participating metal ions possess large single ion anisotropy, has failed to show up any slow magnetic relaxation.

  19. 镝与二甘醇酸的配位聚合物的水热合成、晶体结构及荧光性质%Hydrothermal Synthesis, Crystal Structure and Fluorescence Property of Dysprosium Coordination Polymer with Diglycolic Acid

    Institute of Scientific and Technical Information of China (English)

    张艳斌; 鞠艳玲; 李艳秋; 李夏

    2007-01-01

    A new lanthanide coordination polymer {[Dy2(dga)3(H2O)4]·2H2O}n was prepared by hydrothermal method with DyCl3·6H2O and diglycolic acid (H2dga), and structurally characterized by single-crystal X-ray diffraction technique. The complex crystallizes in Orthorhombic system, C2221 space group with a=1.773 5(11) nm, b =0.875 2(6) nm, c=1.504 3(9) nm, V=2.335 0(3) nm3, Dc=2.359 Mg·m-3, Z=4,μ=6.447 mm-1, F(000)=1 584.0, R=0.0507, wR=0.121 6. In the complex, there are two types of coordination environments for Dy3+ ion. One Dy1 ion is nine-coordinated by three diglycolato groups via six carboxyl oxygen atoms and three ether oxygen atoms. The Dy1 ion is in a distorted monocapped square-antiprism coordination geometry. Whereas the other Dy2 ion is eight-coordinated and the coordination sphere around each Dy2 ion consists of four carboxyl oxygen atoms from four diglycolato ligands and four oxygen atoms from four coordinated water molecules. The coordination polyhedron of Dy2 ion can be described as a distorted square-antiprism. Eight- and nine-coordinate Dy3+ ions are linked by diglycolato ligands to form a 2D network structure. The fluorescence spectral of the complex in solid state at room temperature shows that the diglycolic acid is suitable for the sensitization on the luminescence of Dy3+ ion. CCDC: 660435.%DyCl3·6H2O与二甘醇酸(H2dga)在水热条件下反应得到配位聚合物{[Dy2(dga)3(H2O)4]·2H2O}n,用X-射线衍射单晶结构分析方法确定了其晶体结构.该配合物的晶体属于正交晶系,C2221空间群.在配合物中,Dy3+离子存在两种类型的配位环境.九配位的Dy1离子与3个二甘醇酸根的6个羧基氧原子和3个醚氧原子配位,其配位多面体可描述为一个扭曲的单帽四方反棱柱;八配位的Dy2离子周围的8个配位氧原子形成一个扭曲的四方反棱柱配位多面体,其中4个氧原子来自4个二甘醇酸根,另外4个氧原子由4个配位水分子提供.二甘醇酸配体的2个羧基和其醚氧原子同时与Dy3+离子配位而形成2D网状结构.该配合物在室温下的固体荧光光谱显示了中心Dy3+离子的特征荧光,位于483 nm和574 nm的发射峰分别对应于Dy3+离子的4F9/2→6H15/2和4F9/2→6H13/2跃迁.

  20. 稀土金属 Dy 掺杂 TiO2光催化剂的制备及其对孔雀石绿降解性能的研究%Study on preparation of rare earth element dysprosium doped with TiO2 photocatalyst and its degradation property to malachite green

    Institute of Scientific and Technical Information of China (English)

    高航; 高梅; 李松田; 马威; 吴晓兵

    2015-01-01

    To improve the oxidation efficiency of heterogeneous photocatalysis,TiO2 doped by rare-earth elements was adopted. The results indicate that:there was red-shift adsorption spectra of synthetic product which could enhance malachite green oxidative decolorization effectively under the action of normal visible light. Due to Dy3 + -TiO2 doped photocatalyst,activation energy of photooxidation was decreased so that the efficiency of photolysis could be improved significantly. What’s more,the treatment of malachite green model wastewater with Dy3 + -TiO2 was studied and optimal conditions has been determined as follows:the concentration of malachite green is 20 mg / L,molar ratio of Dy-doping is 1. 5% . Under that reaction con-dition,after 150 min,the decolorization rates of malachite green will be over 60% .%采用稀土元素掺杂法制备改性的二氧化钛,以改善非均相光催化的氧化效率。研究结果表明,在掺杂镝元素之后,产物的吸收光谱发生了红移,在可见光作用下,可以有效地促进孔雀石绿的氧化脱色。引入掺杂型光催化剂 Dy3+-TiO2后,可降低光氧化体系所需的能量,提高光解效率。以孔雀石绿溶液作为模拟废水,考察了 Dy3+离子掺杂量、底物浓度等因素的影响,确定了优化的实验条件:在孔雀石绿的浓度为20 mg/ L,稀土元素 Dy 掺杂量为1.5%(摩尔比)时,反应150 min 后孔雀石绿脱色率达到60%以上。

  1. N-对甲苯磺酰β-丙氨酸镝配合物的合成、晶体结构及抑菌活性%Synthesis crystal structure and antibacterial activity of dysprosium complex with N-p-tolysulfonyl-β-Alanine

    Institute of Scientific and Technical Information of China (English)

    李森兰; 马录芳; 王利亚; 黄世稳; 韦启后; 梁福沛; 张漫波

    2005-01-01

    稀土由于其特殊的电子结构,容易与一些中性、酸性和碱性生物配体形成配合物。本文合成并测定了对甲苯磺酰β-丙氨酸与稀土镝配合物的晶体结构及抑菌活性。

  2. Bis[μ-2-(4-hydroxyphenylacetato]-κ3O,O′:O;κ3O:O,O′-bis{aqua(4,4′-bipyridine-κNbis[2-(4-hydroxyphenylacetato-κ2O,O′]dysprosium(III} monohydrate

    Directory of Open Access Journals (Sweden)

    Jia-Lu Liu

    2010-12-01

    Full Text Available In the title dinuclear complex, [Dy2(C8H7O36(C10H8N22(H2O2]·H2O, the DyIII atoms are coordinated by eight O atoms from four 2-(4-hydroxyphenylacetate (HPAA ligands and a water molecule, and one N atom from a 4,4′-bipyridine (bipy ligand in a distorted tricapped trigonal prismatic geometry. Whereas four HPAA ligands coordinate to just two DyIII atoms, the remaining two ligands bridge the two DyIII atoms. In the crystal, O—H...O and O—H...N hydrogen bonds link the molecules into a three-dimensional network.

  3. Poly[hexa-aqua-tri-μ-malonato-didysprosium(III)].

    Science.gov (United States)

    Fang, Zhan-Qiang; Zeng, Rong-Hua; Song, Zhao-Feng; Yang, Mei

    2008-06-07

    The title compound, [Dy(2)(C(3)H(2)O(4))(3)(H(2)O)(6)](n), forms a coordination polymeric structure comprising hydrated dysprosium ions and malonate ligands. In the asymmetric unit, there are one dysprosium ion, one and a half malonate ligands, and three water mol-ecules. Each Dy(III) atom is coordinated by six O atoms from four malonate ligands and by three water mol-ecules, and displays a tricapped trigonal-prismatic coordination geometry. The malonate ligands adopt two types of coordination mode, linking dysprosium centres to form a three-dimensional coordination polymer. The extensive network of hydrogen bonds in this polymer enhances the structural stability.

  4. Poly[hexa­aqua­tri-μ-malonato-didysprosium(III)

    Science.gov (United States)

    Fang, Zhan-Qiang; Zeng, Rong-Hua; Song, Zhao-Feng; Yang, Mei

    2008-01-01

    The title compound, [Dy2(C3H2O4)3(H2O)6]n, forms a coordination polymeric structure comprising hydrated dysprosium ions and malonate ligands. In the asymmetric unit, there are one dysprosium ion, one and a half malonate ligands, and three water mol­ecules. Each DyIII atom is coordinated by six O atoms from four malonate ligands and by three water mol­ecules, and displays a tricapped trigonal–prismatic coordination geometry. The malonate ligands adopt two types of coordination mode, linking dysprosium centres to form a three-dimensional coordination polymer. The extensive network of hydrogen bonds in this polymer enhances the structural stability. PMID:21202748

  5. Poly[hexa­aqua­tri-μ-malonato-didysprosium(III)

    OpenAIRE

    2008-01-01

    The title compound, [Dy2(C3H2O4)3(H2O)6]n, forms a coordination polymeric structure comprising hydrated dysprosium ions and malonate ligands. In the asymmetric unit, there are one dysprosium ion, one and a half malonate ligands, and three water molecules. Each DyIII atom is coordinated by six O atoms from four malonate ligands and by three water molecules, and displays a tricapped trigonal–prismatic coordination geometry. The malonate ligands adopt two types of coordination mode, linkin...

  6. Photoluminescence, trap states and thermoluminescence decay process study of Ca2MgSi2O7 : Eu2+, Dy3+ phosphor

    Indian Academy of Sciences (India)

    Ravi Shrivastava; Jagjeet Kaur; Vikas Dubey; Beena Jaykumar

    2014-06-01

    Europium and dysprosium-doped calcium magnesium silicate powder with different concentrations of dysprosium were synthesized using solid-state reaction. The Fourier transform infrared (FT–IR) spectra confirmed the proper preparation of the sample. The prepared phosphors were characterized using photoluminescence excitation and emission spectra. Prominent green colour emission was obtained under ultraviolet excitation. The thermoluminescence glow curves of the samples were measured at various delay times. With increased delay time, the intensity of the thermoluminescence peak decays and the position of the thermoluminescence peak shifts towards higher temperature, indicating the considerable retrapping associated with general order kinetics.

  7. Osteoarthritis of the knee in coal miners: report by the Industrial Injuries Advisory Council in accordance with Section 171 of the Social Security Administration Act 1992 considering prescription for osteoarthritis of the knee in coal miners

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-08-15

    The report considers prescription for osteoarthritis of the knee in miners. Osteoarthritis of the knee, a common disorder in the general population, was last reviewed by the Council in May 1995 in its Command paper 'Disorders of the Knee' (Cm. 2842). This report follows a representation from an ex-Council member highlighting epidemiological evidence of an increased risk of this disorder in miners. The coal mining industry has undergone many changes which have decreased the extent to which miners have been exposed to such employment conditions, notably the closure of many mines by 1986. However, there is evidence that the relevant exposure circumstances will still have occurred after 1986 in certain categories of miner, such as faceworkers working nonmechanised coal faces.It is recommended that osteoarthritis of the knee should be prescribed in relation to work as an underground miner for ten years or more in aggregate; but that to be reckonable, any service from 1986 onwards should be in certain specific categories of coal mining occupation, as set out in the recommended prescription schedule. 2 apps.

  8. Corrigendum to "Structure and dynamics of food webs in the water column on shelf and slope grounds of the western Mediterranean" [J. Mar. Syst. 138 (2014) 171-181

    Science.gov (United States)

    Valls, M.; Sweeting, C. J.; Olivar, M. P.; Fernández de Puelles, M. L.; Pasqual, C.; Polunin, N. V. C.; Quetglas, A.

    2014-11-01

    The authors regret that the printed version of the above article contained a number of errors. The correct and final version of Tables 1 and 2, Acknowledgments and Amores and Monserrat (2014) reference follow. The authors would like to apologise for any inconvenience caused.

  9. CRED Sea Surface Temperature (SST) Buoy; NWHI, LAY; Long: -171.74252, Lat: 25.77290 (WGS84); Sensor Depth: 0.33m; Data Range: 20030724-20040923.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Sea Surface Temperature (SST) Buoys provide a time series of...

  10. CRED Subsurface Temperature Recorder (STR); Swains Island, American Samoa; Long: -171.09089, Lat: -11.05852 (WGS84); Sensor Depth: 15.50m; Data Date Range: 20100316-20120321.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Subsurface Temperature Recorders (STR) provide a time series of...

  11. CRED Subsurface Temperature Recorder (STR); Swains Island, American Samoa; Long: -171.06471, Lat: -11.05253 (WGS84); Sensor Depth: 14.60m; Data Date Range: 20100317-20120321.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Subsurface Temperature Recorders (STR) provide a time series of...

  12. CRED Sea Surface Temperature (SST) Buoy; NWHI, LAY; Long: -171.74252, Lat: 25.77290 (WGS84); Sensor Depth: 0.33m; Data Range: 20020915-20030722.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Sea Surface Temperature (SST) Buoys provide a time series of...

  13. Un crime de féminicide en France ? A propos de l’article 171 de la loi relative à l’égalité et à la citoyenneté

    OpenAIRE

    Leray, Elisa; Monsalve, Elda

    2017-01-01

    La loi relative à l’égalité et à la citoyenneté du 27 janvier 2017 présente des avancées concernant la lutte contre les violences faites aux femmes : cette loi permet d’aggraver les crimes ou délits commis en raison du sexe de la victime. Cependant, le droit pénal français refuse de consacrer le féminicide.

  14. CRED Sea Surface Temperature (SST) Buoy; NWHI, LAY; Long: -171.74242, Lat: 25.77248 (WGS84); Sensor Depth: 0.19m; Data Range: 20060910-20071203.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Sea Surface Temperature (SST) Buoys provide a time series of...

  15. National Dam Inspection Program. Oxford Valley Mall Dam (NDS-ID Number PA-00801, DER-ID Number 9-171), Delaware River Basin, Queen Ann Creek, Bucks County, Pennsylvania. Phase I Inspection Report.

    Science.gov (United States)

    1980-01-01

    be in good condition, with some slight leaks through the top and sides and leachate stalactites . The exposed portions of the transition structure at...available design/eval- uation data, relatively simple hydraulic calculations, or information from the USGS Quandrangle maps. The input format is flexible...approximately midway within a 2,000 foot wide northeast-southwest trending belt of Chickies Quartzite. This early Cambrian age formation consists of

  16. CRED Subsurface Temperature Recorder (STR); Swains Island, American Samoa; Long: -171.07612, Lat: -11.04560 (WGS84); Sensor Depth: 14.30m; Data Date Range: 20100317-20120322.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Subsurface Temperature Recorders (STR) provide a time series...

  17. CRED Sea Surface Temperature (SST) Buoy; NWHI, LAY; Long: -171.74250, Lat: 25.77240 (WGS84); Sensor Depth: 0.33m; Data Range: 20040924-20060910.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Data from Coral Reef Ecosystem Division (CRED), NOAA Pacific Islands Fisheries Science Center (PIFSC) Sea Surface Temperature (SST) Buoys provide a time series of...

  18. CRED Ocean Data Platform (ODP), Temperature and Conductivity Recorder (SBE37); AMSM, SWA; Long: -171.09092, Lat: -11.05848 (WGS84); Sensor Depth: 15.00m; Data Range: 20020227-20040118.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Ocean Data Platform (ODP) is placed on the sea floor to measure water current profiles, waves, temperature and conductivity. The ODP consists of an upward...

  19. CRED Ocean Data Platform (ODP), Acoustic Doppler Profiler (ADP); AMSM, SWA; Long: -171.09092, Lat: -11.05848 (WGS84); Sensor Depth: 15.00m; Data Range: 20020227-20021207.

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Ocean Data Platform (ODP) is placed on the sea floor to measure water current profiles, waves, temperature and conductivity. The ODP consists of an upward...

  20. Doctoral Students in New Zealand Have Low Awareness of Institutional Repository Existence, but Positive Attitudes Toward Open Access Publication of Their Work. A Review of: Stanton, K. V., & Liew, C. L. (2012. Open access theses in institutional repositories: An exploratory study of the perceptions of doctoral students. Information Research, 17(1, paper 507. Available from http://InformationR.net/ir/17-1/paper507.html

    Directory of Open Access Journals (Sweden)

    Theresa S. Arndt

    2012-12-01

    Full Text Available Objective – To investigate doctoral students'knowledge of and attitudes toward openaccess models of scholarly communication andinstitutional repositories, and to examine theirwillingness to comply with a mandatoryinstitutional repository (IR submission policy.Design – Mixed method, sequentialexploratory design.Setting – A large, multi-campus New Zealanduniversity that mandates IR deposit of doctoraltheses.Subjects – Two doctoral students from each offour university colleges were interviewed. All901 doctoral students were subsequently sent asurvey, with 251 responding.Methods – Semi-structured interviews witheight subjects selected by purposive sampling,followed by a survey sent to all doctoralstudents. The authors used NVivo 8 foranalysis of interview data, along with a twophaseapproach to coding. First, they analyzedtranscripts from semi-structured interviewsline-by-line to identify themes. In the secondphase, authors employed focused coding toanalyze the most common themes and tomerge or drop peripheral themes. Themeswere mapped against Rogers' diffusion ofinnovation theory and social exchange theoryconstructs to aid interpretation. The resultswere used to develop a survey with a fixed set of response choices. Authors then analyzed survey results using Excel and SurveyMonkey, first as a single data set and then by discipline.Main Results – The authors found that general awareness of open access was high (62%, and overall support for open access publication was 86.3%. Awareness of IRs as a general concept was much lower at 48%. Those subject to a mandatory IR deposit policy for doctoral theses overwhelmingly indicated willingness to comply (92.6%, as did those matriculating prior to the policy (83.3%, although only 77.3% of all respondents agreed that deposit should be mandatory. Only 17.6% of respondents had deposited their own work in an IR, while 31.7% reported directly accessing a repository for research. The greatest perceived benefits of IR participation were removal of cost for readers, ease of sharing research, increased exposure and citing of one's work, and professional networking. The greatest perceived risks were plagiarism, loss of ability to publish elsewhere, and less prestige relative to traditional publication. The reason most given for selecting a specific publication outlet was recommendation of a doctoral supervisor. Disciplinary differences in responses were not sizable.For additional interpretation, the authors applied Rogers’s diffusion of innovations theory to determine the extent to which IRs are effective innovations. The authors posit that repositories will become a more widely adopted innovations as awareness of IRs in general increases, and through increased awareness that IR content is discoverable through major search engines such as Google Scholar, thus improving usability and increasing dissemination of research. Using the social exchange theory framework, the authors found that respondents’ expressed willingness to deposit their work in IRs demonstrated altruistic motives for sharing their research freely with others, appreciation for the reciprocity of gaining access to others’ research, and awareness of the potential direct reward of having their work cited more often.Conclusion – Authors identified that lack of awareness, rather than resistance to deposit, as the main barrier to IR depository participation. Major benefits perceived for participating included the public good of knowledge sharing and increased exposure for one’s work. Concerns included copyright and plagiarism issues. These findings have implications for communication and marketing campaigns to promote doctoral students' deposit of their work in institutional repositories. While respondents reported low direct use of IRs for conducting research, the vast majority reported using Google Scholar, and so may have unknowingly accessed open access repository content. This finding suggests that attention be given to enhanced metadata for optimizing discoverability of IR content through general search engines.