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1

Process for separation of zirconium-88, rubidium-83 and yttrium-88  

DOEpatents

A process for selective separation of strontium-82 and strontium-85 from proton irradiated molybdenum targets is provided and includes dissolving the molybdenum target in a hydrogen peroxide solution to form a first ion-containing solution, passing the first ion-containing solution through a first cationic resin whereby ions selected from the group consisting of molybdenum, niobium, technetium, selenium, vanadium, arsenic, germanium, zirconium and rubidium remain in the first ion-containing solution while ions selected from the group consisting of rubidium, zinc, beryllium, cobalt, iron, manganese, chromium, strontium, yttrium and zirconium are selectively adsorbed by the first resin, contacting the first resin with an acid solution capable of stripping adsorbed ions from the first cationic exchange resin whereby the adsorbed ions are removed from the first resin to form a second ion-containing solution, evaporating the second ion-containing solution for time sufficient to remove substantially all of the acid and water from the second ion-containing solution whereby a residue remains, dissolving the residue from the evaporated second-ion containing solution in a dilute acid to form a third ion-containing solution, said third ion-containing solution having an acid molarity adapted to permit said ions to be adsorbed by a cationic exchange resin, passing the third ion-containing solution through a second cationic resin whereby the ions are adsorbed by the second resin, contacting the second resin with a dilute sulfuric acid solution whereby the adsorbed ions selected from the group consisting of rubidium, zinc, beryllium, cobalt, iron, manganese, chromium, and zirconium are selectively removed from the second resin, and contacting the second resin with a dilute acid solution whereby the adsorbed strontium ions are selectively removed. Zirconium, rubidium, and yttrium radioisotopes can also be recovered with additional steps.

Heaton, Richard C. (Los Alamos, NM); Jamriska, Sr., David J. (Los Alamos, NM); Taylor, Wayne A. (Los Alamos, NM)

1994-01-01

2

Dendritic cell specific targeting of MyD88 signalling pathways in vivo.  

PubMed

Dendritic cells (DCs) are key regulators of both innate and adaptive immunity. During infection, DCs recognise pathogen-associated molecular patterns (PAMPs) via pattern recognition receptors (PRRs) including the Toll-like receptor (TLR) family. TLRs mainly signal via the adaptor protein MyD88. This signalling pathway is required for immune protection during many infections, which are lethal in the absence of MyD88. However, the cell type specific importance of this pathway during both innate and adaptive immune responses against pathogens in vivo remains ill-defined. We discuss recent findings from conditional KO or gain-of-function mouse models targeting TLR/MyD88 signalling pathways in DCs and other myeloid cells during infection. While the general assumption that MyD88-dependent recognition by DCs is essential for inducing protective immunity holds true in some instances, the results surprisingly indicate a much more complex context-dependent requirement for this pathway in DCs and other myeloid or lymphoid cell-types in vivo. Furthermore, we highlight the advantages of Cre-mediated DC targeting approaches and their possible limitations. We also present future perspectives on the development of new genetic mouse models to target distinct DC subsets in vivo. Such models will serve to understand the functional heterogeneity of DCs in vivo. PMID:25403892

Arnold-Schrauf, Catharina; Berod, Luciana; Sparwasser, Tim

2015-01-01

3

INTERACTION OF LASER RADIATION WITH MATTER. LASER PLASMA: Laser plume spectroscopy. 2. Graphite yttrium-stabilised and zirconium oxide targets  

NASA Astrophysics Data System (ADS)

Spectral and kinetic properties of a plume formed in the vicinity of a graphite and a pressed yttrium-stabilised zirconium oxide (YSZ) powder targets irradiated in air by a 10.6-?m pulsed CO2 laser with a peak power of 1.5-9 kW at room temperature are studied. The plume propagated at right angles to the target surface and at an angle of 45° to the laser radiation. The spectral and kinetic characteristics of its luminescence were measured discretely along the entire length of the plume. It is shown that the YSZ plume as well as the graphite plume is a flux of nonequilibrium gaseous plasma at a temperature of about 4.7-3.1 kK, in which a luminescence of YO and ZrO radicals is excited.

Osipov, V. V.; Solomonov, V. I.; Platonov, V. V.; Snigireva, O. A.; Ivanov, M. G.; Lisenkov, V. V.

2005-07-01

4

The orphan GPCR, GPR88, modulates function of the striatal dopamine system: a possible therapeutic target for psychiatric disorders?  

PubMed

In rodents, the orphan G protein-coupled receptor, Gpr88, is highly expressed in brain regions implicated in the pathophysiology of and is modulated by treatments for schizophrenia. We compared striatal function of Gpr88 knockout mice (Gpr88KOs) to wild-type mice using molecular, neurochemical and behavioral tests. Gpr88KOs lacked expression of Gpr88 in striatum, nucleus accumbens and layer IV of cortex. Gpr88KOs had normal striatal dopamine D2 receptor density and affinity and DARPP-32 expression but Gpr88KOs had higher basal striatal phosphorylated DARPP-32 Thr-34. In vivo microdialysis detected lower basal dopamine in Gpr88KOs while amphetamine-induced dopamine release was normal. Behaviorally, Gpr88KOs demonstrated disrupted prepulse inhibition of startle (PPI) and increased sensitivity to apomorphine-induced climbing and stereotypy (AICS) and amphetamine-stimulated locomotor activity. Antipsychotic administration to Gpr88KOs normalized the PPI deficit and blocked AICS. The modulatory role of Gpr88 in striatal dopamine function suggests it may be a new target for treatments for psychiatric disorders. PMID:19796684

Logue, Sheree F; Grauer, Steven M; Paulsen, Janet; Graf, Radka; Taylor, Noel; Sung, M Amy; Zhang, Lynn; Hughes, Zoë; Pulito, Virginia L; Liu, Feng; Rosenzweig-Lipson, Sharon; Brandon, Nicholas J; Marquis, Karen L; Bates, Brian; Pausch, Mark

2009-12-01

5

Repair of Damaged M-Chromium-Aluminum-Yttrium Coatings Targeting Petroleum Industry Applications  

NASA Astrophysics Data System (ADS)

The increase in efficiency of furnace and refinery components in petroleum industries has been the target of many studies. However, the repair technology for damaged pieces is still to be developed. During prolonged service, a degradation of developed coatings occurs as a result of the harsh environment. Therefore, a repair technology, which can extend the life of the coatings, is now under consideration. In this work, electrospark deposition (ESD) has been investigated to understand the solidification behavior and its possibility to repair damaged MCrAlY coatings. Ni-based alloys with different compositions were deposited on Ni substrate using ESD to understand crystal structure of the solidified deposit and the effect of the dissimilar weld composition on dilution. The electrode samples were prepared by spark plasma sintering (SPS). Firstly, different coatings with single and bi-phase microstructure were deposited on pure Ni substrate. Secondly, NiCoCrAlY and CoNiCrAlY were deposited on the damaged spot of the oxidized NiCoCrAlY and CoNiCrAlY respectively. A fine microstructure of metastable phases obtained from each deposit. Also, it was found that an epitaxial growth of NiCoCrAlY and CoNiCrAlY were obtained on the damaged spots. In addition, ?-Al 2O3 was obtained on the surface of the deposit after 24hr oxidation at 1000°C.

Farhat, Rabab

6

The evolution of melasma therapy: targeting melanosomes using low-fluence Q-switched neodymium-doped yttrium aluminium garnet lasers.  

PubMed

Melasma is an acquired disorder of pigmentation that commonly affects women with phototypes III-V, and it has a negative impact on the quality of life in affected individuals. It presents clinically as symmetric tan or brown patches on the face, most often involving the forehead, cheeks, perioral region, and periorbital region. On histologic examination, there is increased melanin in the epidermis and/or an increased number of melanosomes in the dermis, with a normal number of highly melanized and dendritic melanocytes. The mainstay of treatment is the use of sunscreen along with topical medications that suppress melanogenesis. Clearance is usually incomplete and recurrences or exacerbations are frequent, probably because of the poor efficacy in clearing dermal melanosomes. Treatment with high-energy pigment-specific lasers, ablative resurfacing lasers, and fractional lasers results in an unacceptably high rate of postinflammatory hyper- and hypopigmentation and rebound melasma. Recently, promising results have been achieved with low-fluence Q-switched neodymium-doped yttrium aluminium garnet laser treatment, which can selectively target dermal melanosomes without producing inflammation or epidermal damage, in all skin phototypes. This article reviews the current treatment modalities for melasma, the rationale for using and the clinical results of combination therapy with low-fluence Q-switched neodymium-doped yttrium aluminium garnet lasers. PMID:22640433

Kauvar, Arielle N B

2012-06-01

7

(Data in metric tons of yttrium oxide (Y2O3) content, unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was mined as a constituent of the mineral bastnsite  

E-print Network

-resistant and corrosion-resistant cutting tools, seals and bearings, high-temperature refractories for continuous-85 25-200 22-88 22-88 Yttrium metal, per kilogram, 99.0% to 99.9% purity4 80-100 80-100 95-115 95-115 95-earth metals, scandium and yttrium, whether or not intermixed or interalloyed 2805.30.0000 5.0% ad val. Yttrium

8

(Data in metric tons of yttrium oxide (Y2O3) content, unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was mined as a constituent of the mineral bastnasite  

E-print Network

, seals and bearings, high- temperature refractories for continuous-casting nozzles, jet engine coatings-85 22-85 25-200 22-88 Yttrium metal, per kilogram, 99.0% to 99.9% purity4 80-100 80-100 80-100 95-115 95-earth metals, scandium and yttrium, whether or not intermixed or interalloyed 2805.30.0000 5.0% ad val. Yttrium

9

Astatine and Yttrium Resonant Ionization Laser Spectroscopy  

NASA Astrophysics Data System (ADS)

Providing intense, contamination-free beams of rare isotopes to experiments is a challenging task. At isotope separator on-line facilities such as ISAC at TRIUMF, the choice of production target and ion source are key to the successful beam delivery. Due to their element-selectivity, high efficiency and versatility, resonant ionization laser ion sources (RILIS) gain increasingly in importance. The spectroscopic data available are typically incomplete in the region of excited- and autoionizing atomic states. In order to find the most efficient ionization scheme for a particular element, further spectroscopy is often required. The development of efficient laser resonant ionization schemes for yttrium and astatine is presented in this thesis. For yttrium, two ionization schemes with comparable relative intensities were found. Since for astatine, only two transitions were known, the focus was to provide data on atomic energy levels using resonance ionization spectroscopy. Altogether 41 previously unknown astatine energy levels were found.

Teigelhoefer, Andrea

10

Effect of pulses from a high-power ytterbium fiber laser on a material with a nonuniform refractive index. I. Irradiation of yttrium oxide targets  

NASA Astrophysics Data System (ADS)

The irradiation of Nd:Y2O3 targets with an absorption coefficient of 13-1.7 × 103 cm-1 using laser pulses with a duration of 0.1-3.5 ms and peak power of 200-700 W at a power density of (0.2-1.3) × 106 W/cm2 is studied. A relatively large spread of the delay times of laser plume, spike emission of the laser plume, cleavage of the front surface of the target, and greater ejection of substance from the crater in comparison with the effect of the CO2-laser radiation with almost the same power are demonstrated. A numerical model of the effect of radiation on a target with a nonuniform refractive index is proposed to interpret the destruction of dielectric material (cleavage of the front surface) and the large spread of the delay times of the plume.

Osipov, V. V.; Lisenkov, V. V.; Platonov, V. V.; Orlov, A. N.; Podkin, A. V.; Savvin, I. A.

2014-05-01

11

Side Effects of Yttrium-90 Radioembolization  

PubMed Central

Limited therapeutic options are available for hepatic malignancies. Image guided targeted therapies have established their role in management of primary and secondary hepatic malignancies. Radioembolization with yttrium-90 (90Y) microspheres is safe and efficacious for treatment of hepatic malignancies. The tumoricidal effect of radioembolization is predominantly due to radioactivity and not ischemia. This article will present a comprehensive review of the side effects that have been associated with radioembolization using 90Y microspheres. Some of the described side effects are associated with all transarterial procedures. Side effects specific to radioembolization will also be discussed in detail. Methods to decrease the incidence of these potential side effects will also be discussed. PMID:25120955

Riaz, Ahsun; Awais, Rafia; Salem, Riad

2014-01-01

12

Combinatorial pulsed laser deposition of doped yttrium iron garnet films on yttrium aluminium garnet  

SciTech Connect

We investigate the crystalline growth of yttrium iron garnet (YIG) films doped with bismuth (Bi) and cerium (Ce) by combinatorial pulsed laser deposition, co-ablating a YIG target and either a Bi{sub 2}O{sub 3} or a CeO{sub 2} target, for applications in microwave and optical communications. Substrate temperature is critical for crystalline growth of YIG with simultaneous inclusion of Bi in the garnet lattice, whereas Ce is not incorporated in the garnet structure, but forms a separate CeO{sub 2} phase.

Sposito, A., E-mail: as11g10@orc.soton.ac.uk; Eason, R. W. [Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ (United Kingdom); Gregory, S. A.; Groot, P. A. J. de [Physics and Astronomy, University of Southampton, Southampton SO17 1BJ (United Kingdom)

2014-02-07

13

Combinatorial pulsed laser deposition of doped yttrium iron garnet films on yttrium aluminium garnet  

NASA Astrophysics Data System (ADS)

We investigate the crystalline growth of yttrium iron garnet (YIG) films doped with bismuth (Bi) and cerium (Ce) by combinatorial pulsed laser deposition, co-ablating a YIG target and either a Bi2O3 or a CeO2 target, for applications in microwave and optical communications. Substrate temperature is critical for crystalline growth of YIG with simultaneous inclusion of Bi in the garnet lattice, whereas Ce is not incorporated in the garnet structure, but forms a separate CeO2 phase.

Sposito, A.; Gregory, S. A.; de Groot, P. A. J.; Eason, R. W.

2014-02-01

14

Measurement of Cross-sections of Yttrium (n,xn) Threshold Reactions by Means of Gamma Spectroscopy  

NASA Astrophysics Data System (ADS)

Neutron activation and gamma spectrometry are usable also for the determination of cross-sections of different neutron reactions. We have studied the cross-section of yttrium (n,xn) threshold reactions using quasi mono-energetic neutron source based on the reaction on 7Li target at Nuclear Physics Institute of ASCR in Rez. Yttrium (n,xn) threshold reactions are suitable candidates for fast neutron field measurement by activation detectors. Fast neutron field monitoring is necessary already today at a wide range of accelerator facilities and will gain on importance in future fast reactors of generation IV, accelerator transmutation systems or fusion reactors. The knowledge of the cross-sections is crucial for such purpose. Unfortunately, the cross-section is sufficiently known only for 89Y(n,2n)88Y reaction. For higher orders of reactions there are almost no experimental data. Special attention was paid to the 89Y(n,3n)87Y reaction. The nuclei are produced, both in the ground state with half-life 79.8 hours and in the isomeric state with half-life 13.38 hours. The isomer decays mainly through the gamma transition to the ground state, the beta decay of the excited state is negligible within our accuracy. The cross-sections of both 87Y productions were analyzed.

Chudoba, P.; Kilim, S.; Wagner, V.; Vrzalova, J.; Svoboda, O.; Majerle, M.; Stefanik, M.; Suchopar, M.; Kugler, A.; Bielewicz, M.; Strugalska-Gola, E.; Szuta, M.; Hervas, D.; Herman, T.; Geier, B.

15

New strategies for electrodepositing yttrium oxide  

Microsoft Academic Search

This dissertation describes new strategies to electrodeposit yttrium oxide in non-aqueous media. Yttrium oxide is widely used as a phosphor host material in display devices. Electrodeposition of yttrium oxide is achieved by two methods in this study: (1) by electrogenerating a base at the cathode, and (2) by electrochemically transferring oxide equivalents to a metal center. The electrochemical method used

Vishnu V. Rajasekharan

2005-01-01

16

Reactivity of yttrium carboxylates toward alkylaluminum hydrides.  

PubMed

Yttrocene-carboxylate complex [Cp*2Y(OOCAr(Me))] (Cp*=C5Me5, Ar(Me) =C6H2Me3-2,4,6) was synthesized as a spectroscopically versatile model system for investigating the reactivity of alkylaluminum hydrides towards rare-earth-metal carboxylates. Equimolar reactions with bis-neosilylaluminum hydride and dimethylaluminum hydride gave adduct complexes of the general formula [Cp*2Y(?-OOCAr(Me))(?-H)AlR2] (R=CH2SiMe3, Me). The use of an excess of the respective aluminum hydride led to the formation of product mixtures, from which the yttrium-aluminum-hydride complex [{Cp*2Y(?-H)AlMe2(?-H)AlMe2(?-CH3)}2] could be isolated, which features a 12-membered-ring structure. The adduct complexes [Cp*2Y(?-OOCAr(Me))(?-H)AlR2] display identical (1)J(Y,H) coupling constants of 24.5 Hz for the bridging hydrido ligands and similar (89)Y NMR shifts of ?=-88.1 ppm (R=CH2SiMe3) and ?=-86.3 ppm (R=Me) in the (89)Y DEPT45 NMR experiments. PMID:24151216

Schädle, Christoph; Fischbach, Andreas; Herdtweck, Eberhardt; Törnroos, Karl W; Anwander, Reiner

2013-11-25

17

Characterization of yttrium phosphate and a yttrium phosphate/yttrium aluminate laminate  

SciTech Connect

Single-phase yttrium phosphate (YPO{sub 4}) and a YPO{sub 4}/yttrium aluminate (Y{sub 3}Al{sub 5}O{sub 12}) laminate were studied. Young`s modulus, Poisson`s ratio, Vickers hardness, and coefficient of thermal expansion of YPO{sub 4} sintered bodies were measured. YPO{sub 4} and Y{sub 3}Al{sub 5}O{sub 12} are chemically compatible and morphologically stable up to at least 1,600 C. The fracture behavior was studied by four-point flexural testing on bars with ground or notched tensile surfaces, and by the indentation method. Noncatastrophic fracture could be seen in these specimens. In flexural testing, cracks could be bridged by YPO{sub 4} layers, followed by some interfacial debonding. Indentation responses also consistently showed some interfacial delamination in the YPO{sub 4}/Y{sub 3}Al{sub 5}O{sub 12} laminate.

Kuo, D.H.; Kriven, W.M. [Univ. of Illinois, Urbana, IL (United States). Dept. of Materials Science and Engineering

1995-11-01

18

Europium-doped yttrium silicate nanophosphors prepared by flame synthesis  

E-print Network

Europium-doped yttrium silicate nanophosphors prepared by flame synthesis Xiao Qin a,*, Yiguang Ju; accepted 7 November 2006 Available online 22 December 2006 Abstract Europium-doped yttrium silicate (Y2SiO5

Bernhard, Stefan

19

Elaboration and characterization of yttrium implanted low manganese steel  

Microsoft Academic Search

Low manganese steel samples were yttrium implanted using ion implantation technique. Sample compositions and structures were investigated before and after yttrium implantations to determine the yttrium distribution in low manganese steel. Yttrium implantation depth profiles were characterized using conventional techniques such as X-ray photoelectron spectroscopy (XPS), reflection high energy electron diffraction (RHEED), X-ray diffraction (XRD), glancing angle X-ray diffraction (GAXRD)

E. Caudron; H Buscail; R Cueff; Y. P Jacob; M. F Stroosnijder

1999-01-01

20

New strategies for electrodepositing yttrium oxide  

NASA Astrophysics Data System (ADS)

This dissertation describes new strategies to electrodeposit yttrium oxide in non-aqueous media. Yttrium oxide is widely used as a phosphor host material in display devices. Electrodeposition of yttrium oxide is achieved by two methods in this study: (1) by electrogenerating a base at the cathode, and (2) by electrochemically transferring oxide equivalents to a metal center. The electrochemical method used to deposit yttrium oxide can be used as a benchmark to deposit other emissive mixed oxide phosphor materials used in display devices. The first part of the dissertation describes the oxygen reduction method. In this method, oxygen is reduced electrochemically in the presence of a proton donor to yield hydrogen peroxide. This is further electrochemically reduced in the presence of a metal precursor to form metal hydroxide at the cathode. Subsequent heat treatment of the metal hydroxide forms a metal oxide at the electrode. By using appropriate precursors like yttrium complexes or a mixture of yttrium and europium complexes, yttrium oxide or a mixed oxide of europium and yttrium can be deposited. The latter part of the dissertation describes the electrochemical delivery of oxide equivalents to induce yttrium oxide deposition. This is accomplished by employing an electroactive oxygen donor molecule and an appropriate metal precursor in the electrodeposition process. Depending on the ligand present in the metal precursor, there are at least two mechanistic pathways through which the electrodeposition of metal oxide can occur. In the first case, the oxygen donor is electrochemically reduced to deliver oxide equivalents to the metal center to induce metal oxide deposition. In the second case, formation of a complex between the oxygen donor molecule and the metal precursor is observed before any electrochemical reactions. Unique nanotubular structures were observed when nitrous oxide is used as the oxygen donor molecule. Different electrochemical techniques are used to optimize the formation of nanotubes. Scanning electron microscopy, energy/wavelength dispersive spectroscopy and x-ray powder diffraction are used to examine the morphology, elemental composition and crystallinity of the deposit. Cathodoluminescence, electrochemical quartz crystal microbalance and attenuated total reflectance infrared spectroscopy are used, in some cases to evaluate the emissive property, efficiency and complexation respectively.

Rajasekharan, Vishnu V.

21

Yttrium hydride nanoantennas for active plasmonics  

NASA Astrophysics Data System (ADS)

A key challenge for the development of active plasmonic nanodevices is the lack of materials with fully controllable plasmonic properties. In this work, we demonstrate that a plasmonic resonance in top-down nanofabricated yttrium antennas can be completely and reversibly turned on and off using hydrogen exposure. We fabricate arrays of yttrium nanorods and optically observe in extinction spectra the hydrogen-induced phase transition between the metallic yttrium dihydride and the insulating trihydride. Whereas the yttrium dihydride nanostructures exhibit a pronounced particle plasmon resonance, the transition to yttrium trihydride leads to a complete vanishing of the resonant behavior. The plasmonic resonance in the dihydride state can be tuned over a wide wavelength range by simply varying the size of the nanostructures. Furthermore, we develop an analytical diffusion model to explain the temporal behaviour of the hydrogen loading and unloading process observed in our experiments and gain information about the thermodynamics of our device. Thus, our nanorod system serves as a versatile basic building block for active plasmonic devices ranging from switchable perfect absorbers to active local heating control elements.

Strohfeldt, Nikolai; Tittl, Andreas; Schäferling, Martin; Neubrech, Frank; Kreibig, Uwe; Griessen, Ronald; Giessen, Harald

2014-09-01

22

Fluorine K-Shell X-Ray Cross-Section Measurements for Lithium, BORON-10, Carbon, Nitrogen, and Oxygen Ions on Ultra-Clean Ultra-Thin Yttrium Trifluoride Solid Target Foils  

NASA Astrophysics Data System (ADS)

Flourine K-shell x-ray cross sections have been measured for 1-6 MeV ^7Li ^{+1,+2,+3}, 1.5-11 MeV ^{10}B^{+1,+2,+3,+4,+5 }, 1-10 MeV ^{12} C^{+1,+2,+3,+4,+5,+6+} , 2-9 MeV ^{14}N ^{+1,+3}, and 3-12 MeV ^{16}O^ {+1,+2,+3,+4,+5,+6,+7,+8} incident ions on ultra-clean, ultra-thin YF_3 solid target foils. Previously, fluorine x-ray cross section measurements existed only for a few ions due to the difficult nature of measuring inner-shell ionization under these conditions. Consequently, procedures were developed to produce ultra-clean, ultra-thin target foils and to remove x-ray interference from electron bremsstrahlung and low energy K-shell xrays from contaminant elements. Fluorine x-ray cross sections were subsequently measured using target foils of thicknesses <=2 mug/cm^2. X-ray cross section measurements were compared with the ECPSSR theory over the range of 0.3 < Z_1/Z_2 < 0.9 and 0.2 < v _1/v_{rm 2K} < 0.8 which test the validity of the ECPSSR's approximation for both direct ionization and electron capture. For ^7Li, the ECPSSR was found to correctly predict the data for reduced ion velocities, xi_{rm K} >= 0.3. However, the ECPSSR theory mildly overpredicts the ^7 Li data at lower velocities. For ^ {10}B and ^{16} O ions, the ECPSSR is also found to predict the data at higher reduced ion velocities: xi _{rm K} >= 0.35 for ^{10}B and xi_{rm K} >= 0.5 for ^{16 }O. However, for ^{12 }C and ^{14}N ions, the ECPSSR overpredicts the data by more than a factor of two at higher reduced ion velocities. In addition, for all ions except ^7Li, the ECPSSR underpredicts data at low ion velocities. This effect is probably attributed to increased vacancy production due to molecular promotion processes. Finally, the electron capture contribution to the x-ray cross section has been inferred from the charge state dependence of the data and compared to the ECPSSR. The ECPSSR theory is seen to overpredict electron capture by more than a factor of 2 at all energies.

Marble, Daniel Keith

23

40 CFR 721.10627 - Yttrium borate phosphate vanadate with europium and additional dopants (generic).  

Code of Federal Regulations, 2014 CFR

...Yttrium borate phosphate vanadate with europium and additional dopants (generic...Yttrium borate phosphate vanadate with europium and additional dopants (generic...yttrium borate phosphate vanadate with europium and additional dopants (PMN...

2014-07-01

24

40 CFR 721.10627 - Yttrium borate phosphate vanadate with europium and additional dopants (generic).  

Code of Federal Regulations, 2013 CFR

...Yttrium borate phosphate vanadate with europium and additional dopants (generic...Yttrium borate phosphate vanadate with europium and additional dopants (generic...yttrium borate phosphate vanadate with europium and additional dopants (PMN...

2013-07-01

25

Yttrium implantation effect on low manganese–carbon steel  

Microsoft Academic Search

Low manganese–carbon steels were implanted with yttrium using the ion implantation method. Compositional and structural analyses were carried out before and after yttrium implantation by several techniques such as Rutherford backscattering spectrometry, X-ray photoelectron spectroscopy, reflection high energy electron diffraction, X-ray diffraction and glancing angle X-ray diffraction to observe the yttrium implantation effect on low manganese–carbon steel.

E Caudron; H Buscail; V. A. C Haanapel; Y. P Jacob; M. F Stroosnijder

2000-01-01

26

181Ta perturbed-angular-correlation study of electric quadrupole interactions in yttrium metal and yttrium-hydrogen solid solutions  

Microsoft Academic Search

The perturbed-angular-correlation (PAC) technique has been used to study the electric quadrupole interaction (QI) of the nuclear probe 181Ta in yttrium metal and yttrium-hydrogen solid solutions alpha-YHx with 0<=x<=0.2. The temperature dependence of the quadrupole frequency nuq of 181Ta in yttrium metal, measured in the range 290 K<=T<=1700 K, follows the linear relation nuq(T) = nuq(0)(1-AT) with nuq(0) = 423(3)

M. Forker; U. Hütten; M. Müller

2000-01-01

27

Divalent ytterbium ions in yttrium aluminum garnet and yttrium oxide ceramics  

NASA Astrophysics Data System (ADS)

Laser ceramics based on ytterbium-doped yttrium aluminum garnet and yttrium oxide are synthesized. The transmission, pulsed cathodoluminescence, and electron-spin resonance spectra of these ceramics at room temperature are measured and analyzed. It is shown that all the samples contain Yb2+ ions with the 4 f 136 s electronic configuration of the ground state, which manifest themselves in the form of relatively weak bands in the IR region of the optical spectra in addition to the bands of Yb3+ ions.

Solomonov, V. I.; Orlov, A. N.; Spirina, A. V.; Konev, S. F.; Cholakh, S. O.; Luk'yashin, K. E.

2014-12-01

28

Hydrogen trapping by yttrium in low temperature lithium  

NASA Astrophysics Data System (ADS)

A test to determine the lithium compatibility and impurity gettering capabilities of various materials including yttrium was performed in Beryllium-7 Experimental Lithium Loop (7BELL) at 270°C. Yttrium coupons were exposed in liquid lithium for a total of 3,718 hours. X-ray diffraction and bulk chemical analysis data indicated that yttrium absorbs hydrogen from liquid lithium at 270°C and transforms to yttrium dihydride (YH 2). The transformation of yttrium to YH 2 resulted in embrittlement of the coupons and subsequent fragmentation to small pieces. Additional analysis, based on the equilibrium hydrogen pressures for the transition of yttrium to YH 2, and Sievert's relationship for hydrogen in equilibrium with hydrogen in lithium, indicates that the temperature of yttrium cannot exceed 280°C to control the hydrogen concentration in lithium at below 1 wt ppm. It is concluded in general that yttrium in sponge form is a good getter for removal of hydrogen isotopes from the lithium blanket of a fusion reactor at or below 280°C, which is in excellent agreement with the results of previous authors.

Anantatmula, R. P.; Katsuta, Hiroji

1984-05-01

29

Dopant distribution in nominally yttrium-doped sapphire  

Microsoft Academic Search

The dopant distribution in nominally yttrium-doped sapphire is characterized. The results indicate that virtually all of the intended dopant segregated to the surface of the crystal during growth. This implies that the solubility of yttrium in alumina is <10 ppm even at temperatures approaching the melting point of alumina.

James D. Cawley; J. W. Halbran

1986-01-01

30

Terbium photoluminescence in yttrium aluminum garnet xerogels  

SciTech Connect

Based on a colloidal solution containing terbium, yttrium, and aluminum metal ions, a powder was synthesized and films of terbium-doped yttrium aluminum garnet Tb{sub 0.15}Y{sub 2.85}Al{sub 5}O{sub 12} were grown on single-crystal silicon and porous anodic alumina. Annealing of the sample in a temperature range from 200-1100 deg. C results in an increase in the photoluminescence intensity in the wavelength range from 480-640 nm, which is caused by Tb{sup 3+} ion intra-atomic transitions {sup 5}D{sub 4}{sup {yields}}{sup 7}F{sub j} (j = 3, 4, 5, 6). Annealing at 900 deg. C and higher temperatures gives rise to low-intensity photoluminescence bands in the region of 667 and 681 nm, which correspond to transitions {sup 5}D{sub 4}{sup {yields}}{sup 7}F{sub 0}, {sup 5}D{sub 4}{sup {yields}}{sup 7}F{sub 1}, and room-temperature Stark term splitting, which suggests the existence of a crystalline environment of Tb{sup 3+} ions. The FWHM of spectral lines in the region of 543 nm decreases from {approx}10 to {approx}(2-3) nm as the xerogel annealing temperature is increased from 700 to 900 deg. C and higher. Three bands with maxima at 280, 330, and 376 nm, which correspond to Tb{sup 3+} ion transitions {sup 7}F{sub 6}{sup {yields}}{sup 5}I{sub 8}, {sup 5}L{sub 6}, {sup 5}G{sub 6}, {sup 5}D{sub 3}, are observed in the photoluminescence excitation spectra of the studied structures for the emission wavelength at 543 nm. X-ray diffraction detected the formation of a crystalline phase for a terbium-doped yttrium aluminum garnet powder after annealing at 1100 deg. C.

Maliarevich, G. K.; Gaponenko, N. V., E-mail: nik@nano.bsuir.edu.ru; Mudryi, A. V. [Belarussian State University of Informatics and Radioelectronics (Belarus); Drozdov, Yu. N.; Stepikhova, M. V. [Russian Academy of Sciences, Institute for Physics of Microstructures (Russian Federation); Stepanova, E. A. [Belarussian State University of Informatics and Radioelectronics (Belarus)

2009-02-15

31

Cerium and yttrium oxide nanoparticles are neuroprotective.  

PubMed

The responses of cells exposed to nanoparticles have been studied with regard to toxicity, but very little attention has been paid to the possibility that some types of particles can protect cells from various forms of lethal stress. It is shown here that nanoparticles composed of cerium oxide or yttrium oxide protect nerve cells from oxidative stress and that the neuroprotection is independent of particle size. The ceria and yttria nanoparticles act as direct antioxidants to limit the amount of reactive oxygen species required to kill the cells. It follows that this group of nanoparticles could be used to modulate oxidative stress in biological systems. PMID:16480682

Schubert, David; Dargusch, Richard; Raitano, Joan; Chan, Siu-Wai

2006-03-31

32

ESCA studies of yttrium aluminum garnets  

SciTech Connect

X-ray photoelectron spectroscopy (XPS/ESCA) has been employed to investigate pure single crystals and powdered samples of yttrium aluminum garnet, Y{sub 3}Al{sub 5}O{sub 12} (YAG), and YAG crystals doped with several rare earth elements (Ln = Pr, Er, Ho, Tm) and a transition metal (Cr). Core level XPS peak shapes of the main elements forming the garnet structure can be rationalized due to different structural environments of particular ions modified by doping. The change of dopant oxidation state also results in variation of XPS peaks and helps to identify the sites in which it takes place. Single-crystal and powder samples give different XPS spectra. Possible sources of these differences are discussed. Similarities and differences between simple and mixed oxides are shown. The structure of YAG suggests the presence of only one independent oxygen ion; however the O(1s) spectra of all YAG systems exhibit two readily discerned peaks. An explanation for this dichotomy is discussed, involving the possible polarization of the oxygen valence electron density between the aluminum and yttrium. Alternative explanations are also considered.

Pawlak, D.A. [Univ. of Warsaw, Warszawa (Poland). Dept. of Chemistry] [Univ. of Warsaw, Warszawa (Poland). Dept. of Chemistry; [Inst. of Electronic Materials Technology, Warszawa (Poland); Wozniak, K. [Univ. of Warsaw, Warszawa (Poland). Dept. of Chemistry] [Univ. of Warsaw, Warszawa (Poland). Dept. of Chemistry; Frukacz, Z. [Inst. of Electronic Materials Technology, Warszawa (Poland)] [Inst. of Electronic Materials Technology, Warszawa (Poland); Barr, T.L.; Fiorentino, D. [Univ. of Wisconsin, Milwaukee, WI (United States)] [Univ. of Wisconsin, Milwaukee, WI (United States); Seal, S. [Univ. of Central Florida, Orlando, FL (United States)] [Univ. of Central Florida, Orlando, FL (United States)

1999-03-04

33

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2009. All  

E-print Network

. Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed 2805.30.0000 5.0% ad Production and Use: The rare-earth element yttrium was not mined in the United States in 2009. All yttrium. Other rare-earth compounds, including yttrium oxide >85% Y2O3, yttrium nitrate, and other individual

34

[Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted] Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2010. All  

E-print Network

. Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed 2805.30.0000 5.0% ad Production and Use: The rare-earth element yttrium was not mined in the United States in 2010. All yttrium. Other rare-earth compounds, including yttrium oxide >85% Y2O3, yttrium nitrate, and other individual

35

Modification of yttrium alkoxides: ?-Ketoesterate-substituted yttrium alkoxo/hydroxo/oxo clusters  

PubMed Central

Reaction of Y5O(OiPr)13 (“yttrium iso-propoxide”) with one molar equivalent of isopropyl acetoacetate (iprac) per Y resulted in the formation of Y9O(OH)9(OiPr)8(iprac)8, a rare example of an yttrium alkoxo/hydroxo/oxo cluster. Reaction in a 1:3 molar ratio gave Y4(OH)2(iprac)10 and Y6(OH)6(iprac)12 instead. A fourth cluster, Y9O(OH)9(iprac)16, structurally closely related to Y9O(OH)9(OiPr)8(iprac)8, was obtained upon recrystallization of Y4(OH)2(iprac)10 from CDCl3. PMID:21976779

Lichtenberger, Robert; Baumann, Stefan O.; Bendova, Maria; Maurer, Christian; Schubert, Ulrich

2011-01-01

36

Luminescence of pulsed laser deposited Eu doped yttrium oxide films  

SciTech Connect

Europium doped yttrium oxide (Eu:Y{sub 2}O{sub 3}) phosphor thin films were grown using a pulsed laser deposition (PLD) technique at varying growth conditions. The structural characterization carried out on a series of Eu:Y{sub 2}O{sub 3} films grown on (100) silicon at substrate temperatures in the range of 250{endash}600{degree}C and oxygen pressure in the range of 10{sup {minus}5}Torr to 200 mTorr indicated that films were preferentially (111) oriented. Measurements of photoluminescence and cathodoluminescence properties of laser deposited Eu:Y{sub 2}O{sub 3} thin films and powder used for laser target showed that the best {ital in situ} grown films were {approximately}10{percent}{endash}22{percent} as bright as Eu:Y{sub 2}O{sub 3} powder. A postdeposition annealing treatment of Eu:Y{sub 2}O{sub 3} films led to further improvements in their brightness (up to {approximately}70{percent} with respect to Eu:Y{sub 2}O{sub 3} powder), with cluster sizes of {lt}400nm. {copyright} {ital 1997 American Institute of Physics.}

Jones, S.L.; Kumar, D.; Singh, R.K.; Holloway, P.H. [Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611-6400 (United States)] [Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611-6400 (United States)

1997-07-01

37

Hickey, TT162, Casts 88-92 Hickey, TT162, Casts 88-92, page 1  

E-print Network

Hickey, TT162, Casts 88-92 Hickey, TT162, Casts 88-92, page 1 CTD088 #12;Hickey, TT162, Casts 88-92 Hickey, TT162, Casts 88-92, page 2 CTD088 #12;Hickey, TT162, Casts 88-92 Hickey, TT162, Casts 88-92, page 3 CTD088 #12;Hickey, TT162, Casts 88-92 Hickey, TT162, Casts 88-92, page 4 CTD088 #12;Hickey, TT162

Hickey, Barbara

38

Radiation induced synthesis of powder yttrium aluminium garnet  

NASA Astrophysics Data System (ADS)

Yttrium-aluminium garnet powders were prepared from aqueous solutions containing yttrium nitrate and aluminium chloride or nitrate via irradiation with accelerated electrons or UV light and via consequent calcination of formed solid phase. UV light seems to be more convenient for yttrium-aluminium garnet preparation; both types of irradiation yield crystalline Y 3Al 5O 12 phase after 1 h calcination at 1000 °C in air, but some amounts of yttrium oxide and aluminium oxide were also detected in calcinated solid phase formed under accelerated electrons irradiation. Preliminary radioluminescence and thermoluminescence measurements were performed to further evaluate prepared materials. Intensive radioluminescence typical for Ce 3+ doped structure was observed; thermoluminescence glow curves show distinctive peaks at 135-140 and 240-250 °C.

?uba, Václav; Indrei, Jakub; Mú?ka, Viliam; Nikl, Martin; Beitlerová, Alena; Pospíšil, Milan; Jakubec, Ivo

2011-09-01

39

Chemical and Physical Properties of Scandium and Yttrium  

Microsoft Academic Search

\\u000a Yttrium has major similarities to scandium and also to the lanthanides (Ln). Their treatment together and comparing their\\u000a chemical and physical properties with those of other metals presents the aim of this chapter.

Scott D. Birmingham; Chaim T. Horovitz

40

Torque Measurements on Rare-Earth Doped Yttrium Iron Garnet  

Microsoft Academic Search

This paper describes torque measurements made at 4.2 and 1.5°K on yttrium iron garnet crystals containing small rare-earth ion dopings kindly supplied by Dr. J. F. Dillon, Jr., and Dr. J. W. Nielson of the Bell Telephone Laboratories. Resonance measurements by Dillon (1959) showed that the giant anisotropy peaks observed in yttrium iron garnet at 4.2°K were due to the

R. F. Pearson; R. W. Cooper

1961-01-01

41

Spallation Neutron Energy Spectrum Determination with Yttrium as a Threshold Detector on U/Pb-assembly ``Energy plus Transmutation''  

NASA Astrophysics Data System (ADS)

Results of two experiments with Yttrium-89 samples on U/Pb-assembly “Energy plus Transmutation” [1] are presented. The assembly is a lead cylindrical target (8.4 cm diameter, 45.6 cm length) with natural uranium blanket (206.4 kg). The lead target was irradiated with JINR Dubna NUCLOTRON with 1.60 and 2.52 GeV deuteron beam. The final purpose of the experiments was to measure neutron field inside the assembly. Yttrium-89 activation detectors were located throughout the entire U/Pb-assembly. Irradiated sample gamma activity was measured with HPGe spectrometer. The gamma spectra were analyzed and the net peak areas were calculated using the DEIMOS program [2]. After short presentation of the activation results neutron spectrum determination method is proposed and its results presented. Assuming reaction model through compound nucleus and using some mathematical tricks Yttrium isotope “k ” production rate discrete formula I_k = Nintlimits_{E_{thr,k} }^infty {? left( E right)? _k left( {E,E_{thr} } right)} dE was transformed into Volterra's integral equation of the first kind and then solved. The method and its applicability still to be discussed. The results as the preliminary ones are for illustrative purpose only.

Kilim, S.; Bielewicz, M.; Strugalska-Gola, E.; Szuta, M.; Wojciechowski, A.; Krivopustov, M. I.; Kovalenko, A. D.; Adam, I.; Krasa, A.; Majerle, M.; Wagner, V.

42

Spallation Neutron Energy Spectrum Determination with Yttrium as a Threshold Detector on U/Pb-assembly "Energy plus Transmutation"  

NASA Astrophysics Data System (ADS)

Results of two experiments with Yttrium-89 samples on U/Pb-assembly "Energy plus Transmutation" [1] are presented. The assembly is a lead cylindrical target (8.4 cm diameter, 45.6 cm length) with natural uranium blanket (206.4 kg). The lead target was irradiated with JINR Dubna NUCLOTRON with 1.60 and 2.52 GeV deuteron beam. The final purpose of the experiments was to measure neutron field inside the assembly. Yttrium-89 activation detectors were located throughout the entire U/Pb-assembly. Irradiated sample gamma activity was measured with HPGe spectrometer. The gamma spectra were analyzed and the net peak areas were calculated using the DEIMOS program [2]. After short presentation of the activation results neutron spectrum determination method is proposed and its results presented. Assuming reaction model through compound nucleus and using some mathematical tricks Yttrium isotope "k " production rate discrete formula I_k = Nintlimits_{E_{thr,k} }^infty {? left( E right)? _k left( {E,E_{thr} } right)} dE was transformed into Volterra's integral equation of the first kind and then solved. The method and its applicability still to be discussed. The results as the preliminary ones are for illustrative purpose only.

Kilim, S.; Bielewicz, M.; Strugalska-Gola, E.; Szuta, M.; Wojciechowski, A.; Krivopustov, M. I.; Kovalenko, A. D.; Adam, I.; Krasa, A.; Majerle, M.; Wagner, V.

43

Microstructure and mechanical response of lanthanum phosphate/yttrium aluminate and yttrium phosphate/yttrium aluminate systems  

SciTech Connect

The use of lanthanum phosphate (LaPO{sub 4}) and yttrium phosphate (YPO{sub 4}) as weak interfaces in composites for high temperature applications was investigated using tape-cast laminates. Interfacial delamination occurred in the YPO{sub 4}/Y{sub 3}Al{sub 5}O{sub 12} laminate under mechanical tests. This laminate showed a promising weak interface, as compared with the LaPO{sub 4}/Y{sub 3}Al{sub 5}O{sub 12} system. The interfacial properties of a fiber model system, (viz., single crystal Y{sub 3}Al{sub 5}O{sub 12} (YAG) fiber/LaPO{sub 4} coating/Al{sub 2}O{sub 3} matrix), as a function of coating thickness were evaluated by the fiber pushout test. Interfacial shear strength, frictional strength, mode II fracture energy, coefficient of friction, and clamping stress were obtained by curve-fitting the theoretical equations to the experimental data.

Kuo, Dong-Hau; Kriven, W.M. [Univ. of Illinois, Urbana-Champaign, IL (United States)

1996-12-31

44

Al NMR study of the structure of lanthanum and yttrium based aluminosilicate glasses and melts  

E-print Network

A 27 Al NMR study of the structure of lanthanum and yttrium based aluminosilicate glasses and melts actinides (Pu as well as minor actinides). Yttrium and lanthanum has been chosen to simulate actinides

Paris-Sud XI, Université de

45

Cation self-diffusion of 44Ca, 88Y, and 96Zr in single-crystalline calcia- and yttria-doped zirconia  

NASA Astrophysics Data System (ADS)

Self-diffusion of calcium, yttrium, and zirconium in single-crystalline YSZ and CSZ (YSZ: yttria-stabilized zirconia; containing 10 to 32 mol % Y2O3; CSZ: calcia-stabilized zirconia; containing 11 and 17 mol % CaO) was measured at temperatures between 960 and 1700 °C. For zirconium and calcium diffusion, the stable isotopes 44Ca and 96Zr were used as tracers and the samples were analyzed with secondary ion mass spectrometry. In the case of yttrium diffusion, the radioactive tracer 88Y was used and an abrasive sectioning technique was applied. Zirconium bulk diffusion is slower than yttrium and calcium bulk diffusion, and there is a nearly linear correlation of diffusion coefficient with cation radius. In YSZ, zirconium and yttrium bulk diffusivity are maximum for a stabilizer content of 10-11 mol %, while in CSZ both calcium and zirconium tracer diffusion are independent of the calcium content. The activation enthalpy of yttrium stabilizer bulk diffusion (4.2 eV) is, as in CSZ, slightly smaller than for zirconium bulk diffusion (4.5 eV). The yttrium dislocation pipe diffusivity is five to six orders of magnitude faster than the bulk diffusivity, and its activation enthalpy (3.5 eV) is also smaller than that of the bulk diffusion. From the activation enthalpy and from the concentration dependence of the cation bulk diffusion, it is concluded that the cation diffusion occurs either via free vacancies (VZr4' in YSZ) or via bound vacancies ([VZr4'-2VO2•]x in CSZ).

Kilo, M.; Taylor, M. A.; Argirusis, Ch.; Borchardt, G.; Lesage, B.; Weber, S.; Scherrer, S.; Scherrer, H.; Schroeder, M.; Martin, M.

2003-12-01

46

Surface modifications induced by yttrium implantation on low manganese–carbon steel  

Microsoft Academic Search

Low manganese–carbon steel samples were ion implanted with yttrium. Sample compositions and structures were investigated before and after yttrium implantations to determine the yttrium distribution in the sample. Yttrium implantation effects were characterized using several analytical and structural techniques such as X-ray photoelectron spectroscopy, reflection high energy electron diffraction, X-ray diffraction, glancing angle X-ray diffraction and Rutherford backscattering spectrometry. In

E Caudron; H Buscail; V. A. C Haanapel; Y. P Jacob; M. F Stroosnijder

1999-01-01

47

Structural phase transitions in yttrium under ultrahigh pressures.  

PubMed

X-ray diffraction studies were carried out on the rare earth metal yttrium up to 177 GPa in a diamond anvil cell at room temperature. Yttrium was compressed to 37% of its initial volume at the highest pressure. The rare earth crystal structure sequence hcp ? Sm type ? dhcp ? mixed(dhcp + fcc) ? distorted fcc (dfcc) is observed in yttrium below 50 GPa. The dfcc (hR24) phase has been observed to persist in the pressure range of 50-95 GPa. A structural transition from dfcc to a low symmetry phase has been observed in yttrium at 99 ± 4 GPa with a volume change of - 2.6%. This low symmetry phase has been identified as a monoclinic C2/m phase, which has also been observed in other rare earth elements under high pressures. The appearance of this low symmetry monoclinic phase in yttrium shows that its electronic structure under extreme conditions resembles that of heavy rare earth metals, with a significant increase in d-band character of the valence electrons and possibly some f-electron states near the Fermi level. PMID:22892680

Samudrala, Gopi K; Tsoi, Georgiy M; Vohra, Yogesh K

2012-09-12

48

Nuclear magnetic resonance wide-line study of hydrogen in the yttrium-yttrium dihydride system  

SciTech Connect

The /sup 1/H nuclear magnetic resonance was studied in the yttrium-hydrogen system YH/sub x/ in the composition range 0.20 less than or equal to x less than or equal to 1.98 and temperature range 77 K less than or equal to T less than or equal to 490/sup 0/K. Both ..cap alpha..- and ..beta..-phases of YH/sub x/ were investigated in polycrystalline (powdered) specimens. Rigid lattice proton resonance second moments were obtained for both ..cap alpha..- and ..beta..-phase samples. Analysis of the second moment for ..cap alpha..-YH/sub x/ (..cap alpha..-phase) indicates that the hydrogen resides in both the tetrahedral and octahedral interstitial sites of the hcp Y lattice. Second moment values for ..beta..-YH/sub x/ (..beta..-phase) indicate that a sizeable fraction of the octahedral interstitial sites in the fcc yttrium metal lattice are occupied by hydrogen, while a nonnegligible fraction of the tetrahedral interstitial sites are vacant. For example, in YH/sub 1.98/, 28% of the octahedral sites are occupied, while 15% of the tetrahedral sites are vacant. The results for ..beta..-YH/sub x/ also indicate that as the H concentration increases, the probability of H occupation of octahedral sites increases.

Anderson, D.L.

1980-03-01

49

Defect Chemistry of Yttrium-Doped Barium Zirconate: A Thermodynamic Analysis of Water Uptake  

E-print Network

Defect Chemistry of Yttrium-Doped Barium Zirconate: A Thermodynamic Analysis of Water Uptake-based SOFCs.3 Of known proton conducting oxides, yttrium-doped barium zirconate (BYZ) is particularly mobile species. Doping with trivalent yttrium onto the tetravalent zirconium in barium zirconate

50

40 CFR 721.10013 - Manganese yttrium oxide (Mn2YO5).  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Manganese yttrium oxide (Mn2YO5). 721.10013 Section 721...Substances § 721.10013 Manganese yttrium oxide (Mn2YO5). (a) Chemical substance...substance identified as manganese yttrium oxide (Mn2 YO5 ) (PMN...

2011-07-01

51

40 CFR 721.10013 - Manganese yttrium oxide (Mn2YO5).  

Code of Federal Regulations, 2014 CFR

...2014-07-01 false Manganese yttrium oxide (Mn2YO5). 721.10013 Section 721...Substances § 721.10013 Manganese yttrium oxide (Mn2 YO5 ). (a) Chemical substance...substance identified as manganese yttrium oxide (Mn2 YO5 ) (PMN...

2014-07-01

52

40 CFR 721.10009 - Manganese yttrium oxide (MnYO3).  

Code of Federal Regulations, 2014 CFR

...2014-07-01 false Manganese yttrium oxide (MnYO3). 721.10009 Section 721...Substances § 721.10009 Manganese yttrium oxide (MnYO3 ). (a) Chemical substance...substance identified as manganese yttrium oxide (MnYO3 ) (PMN P-00-1122;...

2014-07-01

53

40 CFR 721.10009 - Manganese yttrium oxide (MnYO3).  

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Manganese yttrium oxide (MnYO3). 721.10009 Section 721...Substances § 721.10009 Manganese yttrium oxide (MnYO3 ). (a) Chemical substance...substance identified as manganese yttrium oxide (MnYO3 ) (PMN P-00-1122;...

2012-07-01

54

40 CFR 721.10177 - Phosphoric acid, yttrium(3+) salt (1:1).  

Code of Federal Regulations, 2011 CFR

...false Phosphoric acid, yttrium(3+) salt (1:1). 721.10177 Section 721...10177 Phosphoric acid, yttrium(3+) salt (1:1). (a) Chemical substance...identified as phosphoric acid, yttrium(3+) salt (1:1) (PMN P-04-153; CAS...

2011-07-01

55

40 CFR 721.10177 - Phosphoric acid, yttrium(3+) salt (1:1).  

Code of Federal Regulations, 2010 CFR

...false Phosphoric acid, yttrium(3+) salt (1:1). 721.10177 Section 721...10177 Phosphoric acid, yttrium(3+) salt (1:1). (a) Chemical substance...identified as phosphoric acid, yttrium(3+) salt (1:1) (PMN P-04-153; CAS...

2010-07-01

56

Growth and ferromagnetic resonance properties of nanometer-thick yttrium iron garnet films  

E-print Network

Growth and ferromagnetic resonance properties of nanometer-thick yttrium iron garnet films Yiyan and ferromagnetic resonance properties of nanometer-thick yttrium iron garnet films Yiyan Sun,1 Young-Yeal Song,1-thick yttrium iron garnet films and ferromagnetic resonance (FMR) linewidth properties in the films are reported

57

40 CFR 721.10009 - Manganese yttrium oxide (MnYO3).  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Manganese yttrium oxide (MnYO3). 721.10009...Chemical Substances § 721.10009 Manganese yttrium oxide (MnYO3). (a) Chemical...The chemical substance identified as manganese yttrium oxide (MnYO3 ) (PMN...

2010-07-01

58

40 CFR 721.10013 - Manganese yttrium oxide (Mn2YO5).  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Manganese yttrium oxide (Mn2YO5). 721.10013...Chemical Substances § 721.10013 Manganese yttrium oxide (Mn2YO5). (a...The chemical substance identified as manganese yttrium oxide (Mn2 YO5 )...

2010-07-01

59

49 CFR 393.88 - Television receivers.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Television receivers. 393.88 Section 393...Parts and Accessories § 393.88 Television receivers. Any motor vehicle equipped with a television viewer, screen or other means of...

2010-10-01

60

49 CFR 393.88 - Television receivers.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Television receivers. 393.88 Section 393...Parts and Accessories § 393.88 Television receivers. Any motor vehicle equipped with a television viewer, screen or other means of...

2011-10-01

61

45 CFR 96.88 - Administrative costs.  

Code of Federal Regulations, 2010 CFR

...false Administrative costs. 96.88 Section...ADMINISTRATION BLOCK GRANTS Low-income Home Energy...88 Administrative costs. (a) Costs of...the limitation on the cost of planning and administering the low-income home...

2010-10-01

62

45 CFR 96.88 - Administrative costs.  

Code of Federal Regulations, 2011 CFR

...false Administrative costs. 96.88 Section...ADMINISTRATION BLOCK GRANTS Low-income Home Energy...88 Administrative costs. (a) Costs of...the limitation on the cost of planning and administering the low-income home...

2011-10-01

63

45 CFR 96.88 - Administrative costs.  

Code of Federal Regulations, 2013 CFR

...false Administrative costs. 96.88 Section...ADMINISTRATION BLOCK GRANTS Low-income Home Energy...88 Administrative costs. (a) Costs of...the limitation on the cost of planning and administering the low-income home...

2013-10-01

64

45 CFR 96.88 - Administrative costs.  

Code of Federal Regulations, 2012 CFR

...false Administrative costs. 96.88 Section...ADMINISTRATION BLOCK GRANTS Low-income Home Energy...88 Administrative costs. (a) Costs of...the limitation on the cost of planning and administering the low-income home...

2012-10-01

65

45 CFR 96.88 - Administrative costs.  

Code of Federal Regulations, 2014 CFR

...false Administrative costs. 96.88 Section...ADMINISTRATION BLOCK GRANTS Low-income Home Energy...88 Administrative costs. (a) Costs of...the limitation on the cost of planning and administering the low-income home...

2014-10-01

66

STS-88 Day 06 Highlights  

NASA Technical Reports Server (NTRS)

On this sixth day of the STS-88 mission, the flight crew, Commander Robert D. Cabana, Pilot Frederick W. Sturckow, and Mission Specialists Nancy J. Currie, James H. Newman, Jerry L. Ross, and Sergei Krikalev are awakened by Dwight Yokum's "Streets of Bakersfield," requested by the wife of Pilot Rick Sturckow, a California native. Cabana and Sturckow fire Endeavour's primary reaction control jets to raise the altitude of the International Space Station by about 5-1/2 statute miles. Later on Cabana, Sturckow and Currie are interviewed by the ABC News/Discovery Channel and MSNBC.

1998-01-01

67

Effect of yttrium on nucleation and growth of zirconium hydrides  

NASA Astrophysics Data System (ADS)

Addition of yttrium in zirconium causes precipitates of yttrium, which form two types of particles and are oxidized upon heat treatment. One type of particles with sub-micrometer scale sizes has a low population, whereas the other with nano scale sizes has a high population and cluster distribution. Owing to strong affinity of yttrium to hydrogen, the nanoparticles, mostly within the grains of the Zr-Y alloy, attract nucleation of hydrides at the clusters of the nanoparticles and cause preferential distribution of intragranular hydrides. In comparison with that of Zr, additional nanoparticles in the Zr-Y alloy impede further growth of hydride precipitates during hydriding. It is deduced that the impediment of growing hydride precipitates by the nanoparticles is developed during an auto-catalytic nucleation process, which leads to formation of thin and intragranular hydrides, favorable to mitigation of hydride embrittlement.

Li, Changji; Xiong, Liangyin; Wu, Erdong; Liu, Shi

2015-02-01

68

Yttrium and rare earth stabilized fast reactor metal fuel  

DOEpatents

To increase the operating temperature of a reactor, the melting point and mechanical properties of the fuel must be increased. For an actinide-rich fuel, yttrium, lanthanum and/or rare earth elements can be added, as stabilizers, to uranium and plutonium and/or a mixture of other actinides to raise the melting point of the fuel and improve its mechanical properties. Since only about 1% of the actinide fuel may be yttrium, lanthanum, or a rare earth element, the neutron penalty is low, the reactor core size can be reduced, the fuel can be burned efficiently, reprocessing requirements are reduced, and the nuclear waste disposal volumes reduced. A further advantage occurs when yttrium, lanthanum, and/or other rare earth elements are exposed to radiation in a reactor, they produce only short half life radioisotopes, which reduce nuclear waste disposal problems through much shorter assured-isolation requirements.

Guon, Jerold (Woodland Hills, CA); Grantham, LeRoy F. (Calabasas, CA); Specht, Eugene R. (Simi Valley, CA)

1992-01-01

69

9 CFR 381.88 - Parasites.  

Code of Federal Regulations, 2014 CFR

...2014-01-01 2014-01-01 false Parasites. 381.88 Section 381.88...Carcasses and Parts § 381.88 Parasites. Organs or other parts of carcasses...which are found to be infested with parasites, or which show lesions of such...

2014-01-01

70

9 CFR 381.88 - Parasites.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Parasites. 381.88 Section 381.88...Carcasses and Parts § 381.88 Parasites. Organs or other parts of carcasses...which are found to be infested with parasites, or which show lesions of such...

2013-01-01

71

47 CFR 73.88 - Blanketing interference.  

Code of Federal Regulations, 2014 CFR

...2014-10-01 false Blanketing interference. 73.88 Section 73.88 Telecommunication...Broadcast Stations § 73.88 Blanketing interference. The licensee of each broadcast...reasonable complaints of blanketing interference within the 1 V/m contour....

2014-10-01

72

47 CFR 73.88 - Blanketing interference.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Blanketing interference. 73.88 Section 73.88 Telecommunication...Broadcast Stations § 73.88 Blanketing interference. The licensee of each broadcast...reasonable complaints of blanketing interference within the 1 V/m contour....

2013-10-01

73

47 CFR 73.88 - Blanketing interference.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Blanketing interference. 73.88 Section 73.88 Telecommunication...Broadcast Stations § 73.88 Blanketing interference. The licensee of each broadcast...reasonable complaints of blanketing interference within the 1 V/m contour....

2011-10-01

74

47 CFR 73.88 - Blanketing interference.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Blanketing interference. 73.88 Section 73.88 Telecommunication...Broadcast Stations § 73.88 Blanketing interference. The licensee of each broadcast...reasonable complaints of blanketing interference within the 1 V/m contour....

2010-10-01

75

47 CFR 73.88 - Blanketing interference.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Blanketing interference. 73.88 Section 73.88 Telecommunication...Broadcast Stations § 73.88 Blanketing interference. The licensee of each broadcast...reasonable complaints of blanketing interference within the 1 V/m contour....

2012-10-01

76

27 CFR 9.88 - Pacheco Pass.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Pacheco Pass. 9.88 Section 9.88 Alcohol...Viticultural Areas § 9.88 Pacheco Pass. (a) Name. The name of the viticultural...described in this section is “Pacheco Pass.” (b) Approved maps. The...

2010-04-01

77

STS-88 Day 04 Highlights  

NASA Technical Reports Server (NTRS)

On this forth day of the STS-88 mission, the flight crew, Commander Robert D. Cabana, Pilot Frederick W. Sturckow, and Mission Specialists Nancy J. Currie, James H. Newman, Jerry L. Ross, and Sergei are awakened to the sounds of "Somewhere Over the Rainbow," requested by Commander Bob Cabana's daughter, Sarah. With the three-story-high Unity connecting module latched upright in the shuttle's payload bay, Cabana takes manual control of the shuttle as it moves to within about a half-mile of Zarya. Cabana and Sturckow execute a sequence of maneuvers that will bring Endeavour directly above the module. Currie uses the robotic arm to capture the module. She then positions Zarya above Unity's docking mechanism.

1998-01-01

78

Discovery of Yttrium, Zirconium, Niobium, Technetium, and Ruthenium Isotopes  

E-print Network

Currently, thirty-four yttrium, thirty-five zirconium, thirty-four niobium, thirty-five technetium, and thirty-eight ruthenium isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

Nystrom, A

2011-01-01

79

Discovery of Yttrium, Zirconium, Niobium, Technetium, and Ruthenium Isotopes  

E-print Network

Currently, thirty-four yttrium, thirty-five zirconium, thirty-four niobium, thirty-five technetium, and thirty-eight ruthenium isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

A. Nystrom; M. Thoennessen

2011-02-11

80

Induced transition metal moments in rare-earth (yttrium) compounds  

NASA Astrophysics Data System (ADS)

The exchange interactions were analysed in rare-earth (yttrium) transition metal compounds. A transition from nonmagnetic to magnetic state was shown for Co and Ni at ? 70 T and ? 35 T, respectively. The temperature dependences of the magnetic susceptibilities, for the exchange enhanced paramagnets, which change from a T2 dependence to a Curie-Weiss behaviour, as temperature increases, is also analysed.

Burzo, E.

2007-04-01

81

Photomagnetic Anneal Properties of Silicon-Doped Yttrium Iron Garnet  

Microsoft Academic Search

Torque measurements have been made at 4.2°K on crystals of silicon-doped yttrium iron garnet which were irradiated with infrared light. The radiation caused large photomagnetic anneal effects which were found to depend on the plane of polarization of the light.

R. F. Pearson; A. D. Annis; P. Kompfner

1968-01-01

82

Ferromagnetic Resonance in Terbium-Doped Yttrium Iron Garnet  

Microsoft Academic Search

Calculations have been made on a specific model of a terbium-doped yttrium iron garnet system to determine its behavior in ferrimagnetic resonance. Good qualitative agreement has been found with the experiments of Dillon. Quantitative agreement is probably as good as can be expected in view of the fact that the crystal field has to be determined empirically in the course

L. R. Walker

1962-01-01

83

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2004. Yttrium  

E-print Network

Relations 12-31-04 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium Production and Use: The rare-earth element yttrium was not mined in the United States in 2004. Yttrium and compounds containing by weight >19% to rare-earth compounds, including

84

Post-radioembolization yttrium-90 PET/CT - part 1: diagnostic reporting  

PubMed Central

Background Yttrium-90 (90Y) positron emission tomography with integrated computed tomography (PET/CT) represents a technological leap from 90Y bremsstrahlung single-photon emission computed tomography with integrated computed tomography (SPECT/CT) by coincidence imaging of low abundance internal pair production. Encouraged by favorable early experiences, we implemented post-radioembolization 90Y PET/CT as an adjunct to 90Y bremsstrahlung SPECT/CT in diagnostic reporting. Methods This is a retrospective review of all paired 90Y PET/CT and 90Y bremsstrahlung SPECT/CT scans over a 1-year period. We compared image resolution, ability to confirm technical success, detection of non-target activity, and providing conclusive information about 90Y activity within targeted tumor vascular thrombosis. 90Y resin microspheres were used. 90Y PET/CT was performed on a conventional time-of-flight lutetium-yttrium-oxyorthosilicate scanner with minor modifications to acquisition and reconstruction parameters. Specific findings on 90Y PET/CT were corroborated by 90Y bremsstrahlung SPECT/CT, 99mTc macroaggregated albumin SPECT/CT, follow-up diagnostic imaging or review of clinical records. Results Diagnostic reporting recommendations were developed from our collective experience across 44 paired scans. Emphasis on the continuity of care improved overall diagnostic accuracy and reporting confidence of the operator. With proper technique, the presence of background noise did not pose a problem for diagnostic reporting. A counter-intuitive but effective technique of detecting non-target activity is proposed, based on the pattern of activity and its relation to underlying anatomy, instead of its visual intensity. In a sub-analysis of 23 patients with a median follow-up of 5.4 months, 90Y PET/CT consistently outperformed 90Y bremsstrahlung SPECT/CT in all aspects of qualitative analysis, including assessment for non-target activity and tumor vascular thrombosis. Parts of viscera closely adjacent to the liver remain challenging for non-target activity detection, compounded by a tendency for mis-registration. Conclusions Adherence to proper diagnostic reporting technique and emphasis on continuity of care are vital to the clinical utility of post-radioembolization 90Y PET/CT. 90Y PET/CT is superior to 90Y bremsstrahlung SPECT/CT for the assessment of target and non-target activity. PMID:23883566

2013-01-01

85

WSR-88D Cell Trends  

NASA Technical Reports Server (NTRS)

This report documents the Applied Meteorology Unit's evaluation of the Cell Trends display as a tool for radar operators to use in their evaluation of storm cell strength. The objective of the evaluation is to assess the utility of the WSR-88D graphical Cell Trends display for local radar cell interpretation in support of the 45th Weather Squadron (45 WS), Spaceflight Meteorology Group (SMG), and National Weather Service (NWS) Melbourne (MLB) operational requirements. The analysis procedure was to identify each cell and track the maximum reflectivity, height of maximum reflectivity, storm top, storm base, hail and severe hail probability, cell-based Vertically Integrated Liquid (VIL) and core aspect ratio using WATADS Build 9.0 cell trends information. One problem noted in the analysis phase was that the Storm Cell Identification and Tracking (SCIT) algorithm had a difficult time tracking the small cells associated with the Florida weather regimes. The analysis indicated numerous occasions when a cell track would end or an existing cell would be give a new ID in the middle of its life cycle. This investigation has found that most cells, which produce hail or microburst events, have discernable Cell Trends signatures. Forecasters should monitor the PUP's Cell Trends display for cells that show rapid (1 scan) changes in both the heights of maximum reflectivity and cell-based VIEL. It is important to note that this a very limited data set (four case days). Fifty-two storm cells were analyzed during those four days. The above mentioned t=ds, increase in the two cell attributes for hail events and decrease in the two cell attributes for wind events were noted in most of the cells. The probability of detection was 88% for both events. The False Alarm Rate (FAR) was a 36% for hail events and a respectable 25% for microburst events. In addition the Heidke Skill Score (HSS) is 0.65 for hail events and 0.67 for microburst events. For random forecast the HSS is 0 and that a perfect score is 1.

Wheeler, Mark M.

1998-01-01

86

32 CFR 88.1 - Purpose.  

Code of Federal Regulations, 2011 CFR

...OF THE SECRETARY OF DEFENSE PERSONNEL, MILITARY AND CIVILIAN TRANSITION ASSISTANCE FOR MILITARY PERSONNEL § 88.1 Purpose. ...assistance programs for active duty military personnel and their families....

2011-07-01

87

32 CFR 88.1 - Purpose.  

Code of Federal Regulations, 2010 CFR

...OF THE SECRETARY OF DEFENSE PERSONNEL, MILITARY AND CIVILIAN TRANSITION ASSISTANCE FOR MILITARY PERSONNEL § 88.1 Purpose. ...assistance programs for active duty military personnel and their families....

2010-07-01

88

Hot corrosion resistances of yttrium-implanted and unimplanted low-manganese–carbon steels  

Microsoft Academic Search

Yttrium-implanted and unimplanted low-manganese–carbon steel samples were analyzed at T=700°C and under an oxygen partial pressure PO2=0.04 Pa for 24 h to observe the yttrium implantation effect on sample hot corrosion resistance. The yttrium implantation effect on low-manganese–carbon steel was investigated using several analytical and structural techniques such as Rutherford backscattering spectrometry (RBS), X-ray photoelectron spectroscopy (XPS), reflection high energy

E Caudron; H Buscail

2000-01-01

89

Novel Synthesis of Yttrium Phosphate Microspheres for Radioembolization of Cancer  

NASA Astrophysics Data System (ADS)

Chemically durable microspheres containing yttrium and/or phosphorus are useful for intra-arterial radiotherapy. In the present study, we attempted to prepare yttrium phosphate (YPO4) microspheres with high chemical durability as well as smooth surface and investigated their chemical durability in simulated body environment. YPO4 microspheres with smooth surface around 25 ?m were successfully obtained, when gelatin droplets containing YPO4 precursor was cooled to be solidified in water-in-oil emulsion and then heat-treated at 1100°C. The chemical durability of the heat-treated microspheres in simulated body fluid at pH =6 and 7 was high enough for clinical application of radioembolic therapy of cancer.

Kawashita, M.; Matsui, N.; Li, Z.; Miyazaki, T.

2011-10-01

90

Crystallization of metamorphic garnet : nucleation mechanisms and yttrium and rare-earth-element uptake.  

E-print Network

??This dissertation focuses on two areas of garnet porphyroblast crystallization that have until now remained largely uninvestigated: epitaxial nucleation of garnet porphyroblasts and yttrium and… (more)

Moore, Stephanie Jean

2014-01-01

91

Structural and electronic properties of hexagonal yttrium trihydride  

SciTech Connect

The structural and electronic properties of yttrium trihydride with metal atoms in the hexagonal-close-packed (hcp) structure are studied by the pseudopotential method within the local-density-functional approximation (LDA). It is found that the hydrogen positions within the metal lattice have a major role in determining these properties. Calculations confirmed that hexagonal YH[sub 3] with unusual wavelike hydrogen displacements (space group [ital D][sub 3[ital d

Wang, Y.; Chou, M.Y. (School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430 (United States))

1995-03-15

92

Trivalent zirconium and hafnium ions in yttrium oxide ceramics  

NASA Astrophysics Data System (ADS)

An analysis of the electron spin resonance (ESR) spectrum of transparent ceramics composed of yttrium oxide with zirconium and hafnium additives has revealed the presence of signals (with similar parameters) from Zr3+ and Hf3+ ions, which have a similar electron configurations of the ground states: [Kr]4 d 1 and [Xe]5 d 1, respectively. It is shown that the pulsed cathodoluminescence spectra of these ions consist of two bands peaking at ? ? 818 and 900 nm.

Solomonov, V. I.; Spirina, A. V.; Konev, S. F.; Cholakh, S. O.

2014-05-01

93

Yttrium and lanthanum hydride films with switchable optical properties  

Microsoft Academic Search

We discovered that yttrium-, lanthanum- and rare earth-hydride films exhibit remarkable optical properties near their metal–insulator transition: the dihydrides are metallic and shiny while the trihydrides are semiconducting and transparent. The transition between the shiny and transparent state is reversible and can simply be induced by changing the H2 gas pressure or the voltage in an electrolytic cell. No deterioration

R Griessen; J. N Huiberts; M Kremers; A. T. M van Gogh; N. J Koeman; J. P Dekker; P. H. L Notten

1997-01-01

94

Magnetoelastic interaction in an epitaxial yttrium iron garnet film  

NASA Astrophysics Data System (ADS)

Experiments are reported in which hypersound was generated by a magnetostrictive transducer based on an epitaxial single-crystal yttrium iron garnet film. The thickness of the film was equal to half the wavelength of the generated acoustic wave. The principal characteristics of the transducer, measured by the echo method, are presented. A widening of the ferromagnetic resonance line due to a coupling between magnetostatic and elastic modes was observed.

Tychinskii, A. V.

1985-08-01

95

Photomagnetism in Ca2+Fe4+-doped yttrium iron garnet  

Microsoft Academic Search

The temperature and time dependence of the initial susceptibility of the optical magnetization curve has been measured on epitaxial films of nominally pure yttrium iron garnet (YIG) and Ca: YIG, during illumination with white light after cooling in the dark. Depending on sample composition, the maximum temperature for the occurrence of the light-induced effects on the susceptibility is 100 K

M. Pardavi-Horva´th; P. E. Wigen; G. Ve´rtesy

1988-01-01

96

Transmembrane protein 88: a Wnt regulatory protein that specifies cardiomyocyte development  

PubMed Central

Genetic regulation of the cell fate transition from lateral plate mesoderm to the specification of cardiomyocytes requires suppression of Wnt/?-catenin signaling, but the mechanism for this is not well understood. By analyzing gene expression and chromatin dynamics during directed differentiation of human embryonic stem cells (hESCs), we identified a suppressor of Wnt/?-catenin signaling, transmembrane protein 88 (TMEM88), as a potential regulator of cardiovascular progenitor cell (CVP) specification. During the transition from mesoderm to the CVP, TMEM88 has a chromatin signature of genes that mediate cell fate decisions, and its expression is highly upregulated in advance of key cardiac transcription factors in vitro and in vivo. In early zebrafish embryos, tmem88a is expressed broadly in the lateral plate mesoderm, including the bilateral heart fields. Short hairpin RNA targeting of TMEM88 during hESC cardiac differentiation increases Wnt/?-catenin signaling, confirming its role as a suppressor of this pathway. TMEM88 knockdown has no effect on NKX2.5 or GATA4 expression, but 80% of genes most highly induced during CVP development have reduced expression, suggesting adoption of a new cell fate. In support of this, analysis of later stage cell differentiation showed that TMEM88 knockdown inhibits cardiomyocyte differentiation and promotes endothelial differentiation. Taken together, TMEM88 is crucial for heart development and acts downstream of GATA factors in the pre-cardiac mesoderm to specify lineage commitment of cardiomyocyte development through inhibition of Wnt/?-catenin signaling. PMID:23924634

Palpant, Nathan J.; Pabon, Lil; Rabinowitz, Jeremy S.; Hadland, Brandon K.; Stoick-Cooper, Cristi L.; Paige, Sharon L.; Bernstein, Irwin D.; Moon, Randall T.; Murry, Charles E.

2013-01-01

97

Yttrium and yttrium-silicon bearing nickel-base superalloys especially useful as compatible coatings for advanced superalloys  

Microsoft Academic Search

This patent describes a coating composition for application to nickel-base supperalloy substrate. It comprises by weight, 1 to 10% cobalt, 6 to 12% chromium, 5 to 8% aluminum, 1 to 10% tantalum, 1 to 10% tungsten, 0 to 3% rhenium, 0 to 2% molybdenum, 0.1 to 2% hafnium, 0.005 to 0.1% boron, 0.005 to 0.25% carbon, 0.01 to 1.0% yttrium,

R. Darolia; E. H. Goldman

1991-01-01

98

181Ta perturbed-angular-correlation study of electric quadrupole interactions in yttrium metal and yttrium-hydrogen solid solutions  

NASA Astrophysics Data System (ADS)

The perturbed-angular-correlation (PAC) technique has been used to study the electric quadrupole interaction (QI) of the nuclear probe 181Ta in yttrium metal and yttrium-hydrogen solid solutions ?-YHx with 0?x?0.2. The temperature dependence of the quadrupole frequency ?q of 181Ta in yttrium metal, measured in the range 290 K?T?1700 K, follows the linear relation ?q(T) = ?q(0)(1-AT) with ?q(0) = 423(3) MHz and A = 4.74(4)×10-4 K-1. The absorption of hydrogen enhances the temperature dependence of the QI: the parameters ?q(0) and A of the linear temperature variation of the 181Ta QI in ?-YHx measured between 25 K and 1000 K for 0?x?0.2 both increase with increasing concentration x. These trends are consistent with the anionic model of the electronic state of hydrogen in rare earth metals. At T?500 K a dynamic QI caused by diffusing hydrogen has been observed. The activation energy for hydrogen jumps in ?-YH0.10 deduced from the temperature dependence of the quadrupole relaxation rate is Ea = 0.49(15) eV.

Forker, M.; Hütten, U.; Müller, M.

2000-08-01

99

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2006. All  

E-print Network

-31-06 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium and yttrium Production and Use: The rare-earth element yttrium was not mined in the United States in 2006. All yttrium and compounds containing by weight >19% to rare-earth compounds, including

100

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2005. All  

E-print Network

-31-05 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium and yttrium Production and Use: The rare-earth element yttrium was not mined in the United States in 2005. All yttrium and compounds containing by weight >19% to rare-earth compounds, including

101

34 CFR 361.88 - Reporting requirements.  

Code of Federal Regulations, 2010 CFR

...PROGRAM Evaluation Standards and Performance Indicators § 361.88 Reporting...the evaluation standards and performance indicators and include in this...the DSU must develop a program improvement plan pursuant to §...

2010-07-01

102

40 CFR 98.88 - Definitions.  

Code of Federal Regulations, 2011 CFR

...Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Cement Production § 98.88 Definitions. All terms used in this subpart have the same meaning given in the Clean Air Act and...

2011-07-01

103

40 CFR 98.88 - Definitions.  

Code of Federal Regulations, 2013 CFR

...Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Cement Production § 98.88 Definitions. All terms used in this subpart have the same meaning given in the Clean Air Act and...

2013-07-01

104

40 CFR 98.88 - Definitions.  

Code of Federal Regulations, 2010 CFR

...Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Cement Production § 98.88 Definitions. All terms used in this subpart have the same meaning given in the Clean Air Act and...

2010-07-01

105

40 CFR 98.88 - Definitions.  

Code of Federal Regulations, 2012 CFR

...Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Cement Production § 98.88 Definitions. All terms used in this subpart have the same meaning given in the Clean Air Act and...

2012-07-01

106

40 CFR 98.88 - Definitions.  

Code of Federal Regulations, 2014 CFR

...Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Cement Production § 98.88 Definitions. All terms used in this subpart have the same meaning given in the Clean Air Act and...

2014-07-01

107

7 CFR 958.88 - Amendments.  

Code of Federal Regulations, 2012 CFR

...Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE ONIONS GROWN IN CERTAIN DESIGNATED COUNTIES IN IDAHO, AND MALHEUR COUNTY, OREGON Order Regulating Handling Miscellaneous Provisions § 958.88 Amendments....

2012-01-01

108

7 CFR 945.88 - Derogation.  

Code of Federal Regulations, 2013 CFR

...AND ORDERS; FRUITS, VEGETABLES, NUTS), DEPARTMENT OF AGRICULTURE IRISH POTATOES GROWN IN CERTAIN DESIGNATED COUNTIES IN IDAHO, AND MALHEUR COUNTY, OREGON Order Regulating Handling Miscellaneous Provisions § 945.88 Derogation....

2013-01-01

109

7 CFR 945.88 - Derogation.  

Code of Federal Regulations, 2011 CFR

...and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE IRISH POTATOES GROWN IN CERTAIN DESIGNATED COUNTIES IN IDAHO, AND MALHEUR COUNTY, OREGON Order Regulating Handling Miscellaneous Provisions § 945.88 Derogation....

2011-01-01

110

32 CFR 552.88 - Responsibilities.  

Code of Federal Regulations, 2010 CFR

...MILITARY RESERVATIONS Fort Lewis Land Use Policy § 552.88 Responsibilities...initial public release of Ft. Lewis Land Use Policy and area access procedures...community relations issues related to land use. Coordinate special assistance...

2010-07-01

111

42 CFR 88.2 - General provisions.  

Code of Federal Regulations, 2014 CFR

...PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES WORLD TRADE CENTER HEALTH PROGRAM § 88.2 General provisions. (a) Designated representative. (1) An...

2014-10-01

112

7 CFR 984.88 - Agents.  

Code of Federal Regulations, 2010 CFR

... AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE WALNUTS GROWN IN CALIFORNIA Order Regulating Handling Miscellaneous Provisions § 984.88 Agents. The Secretary may,...

2010-01-01

113

Growth and ferromagnetic resonance of yttrium iron garnet thin films on Yiyan Sun, Young-Yeal Song, and Mingzhong Wu  

E-print Network

Growth and ferromagnetic resonance of yttrium iron garnet thin films on metals Yiyan Sun, Young://apl.aip.org/about/rights_and_permissions #12;Growth and ferromagnetic resonance of yttrium iron garnet thin films on metals Yiyan Sun, Young-quality yttrium iron garnet (YIG) thin films were grown on a sandwich structure that consisted of a thick Cu layer

114

Single antidot as a passive way to create caustic spin-wave beams in yttrium iron garnet films  

E-print Network

Single antidot as a passive way to create caustic spin-wave beams in yttrium iron garnet films R://apl.aip.org/about/rights_and_permissions #12;Single antidot as a passive way to create caustic spin-wave beams in yttrium iron garnet films R in yttrium iron garnet film. Diffraction of surface magnetostatic spin waves from such antidot

Demokritov, S.O.

115

Processing of yttrium-doped barium zirconate for high proton conductivity  

E-print Network

Processing of yttrium-doped barium zirconate for high proton conductivity Peter Babilo Materials the transport properties of yttrium-doped barium zirconate (BYZ) have been explored, with the aim of attaining­100 nm) and high-temperature sintering (1600 °C) in the presence of excess barium were essential

116

über die bei der Uranspaltung auftretenden Strontium-und Yttrium-Isotope  

Microsoft Academic Search

Zusammenfassung Es wird ein neues Yttriumisotop von 20 Minuten H. Z. nachgewiesen. Dieses Yttrium läßt sich auch aus „hochemanierenden“ Uranpräparaten als Um-Wandlungsprodukt eines Kryptonisotops gewinnen. Die Versuche zeigen, daß dieses Yttrium schon nach ganz kurzer Bestrahlung des Urans in erheblicher Intensität entsteht. Seine direkte Muttersubstanz, ein Isotop des Strontiums, muß also kurzlebig sein. Die Versuche, dieses hypothetische Strontiumisotop aus schnell

Otto Hahn; Fritz Sirassmann

1943-01-01

117

Yttrium segregation and surface phases of yttria-stabilized zirconia (1 1 1) surface  

Microsoft Academic Search

Surface segregation of yttria-stabilized zirconia (YSZ) was studied via first-principles computations and thermodynamics. For the cubic YSZ (111) surface, yttrium can segregate only to a subsurface layer, and these segregation phases are terminated at the surface by defective oxygen layers with honeycomb structure. The segregation is independent of the bulk yttrium concentration at high oxygen partial pressures or low temperatures.

Xiao-Gang Wang

2008-01-01

118

Improved tensile creep properties of yttrium-and lanthanum-doped alumina: a solid solution effect  

E-print Network

Improved tensile creep properties of yttrium- and lanthanum-doped alumina: a solid solution effect- and lanthanum-doped alumina (at dopant levels below the solubility limit) was examined. Both compositions (100 ppm yttrium, 100 ppm lanthanum) exhibited a uniform microstructure consisting of fine, equiaxed grains

Cho, Junghyun

119

Atomistic Modeling of Native Point Defects in Yttrium Aluminum Garnet Crystals  

E-print Network

Atomistic Modeling of Native Point Defects in Yttrium Aluminum Garnet Crystals Maija M. Kuklja point defects in yttrium aluminum garnet (YAG) are studied in the framework of the pair ALUMINUM GARNET (YAG) is an important material whose technological applications range from lasers

Pandey, Ravi

120

Influence of powerful laser irradiation on electromagneto-optical dependences of yttrium iron garnets  

SciTech Connect

Electromagneto-optical properties of yttrium iron garnets have been investigated in a longitudinal geometry by using optical polarimetry method. It is revealed that irradiation of yttrium iron garnet films by powerful laser impulse leads to essential increase in the electromagneto-optical effect value, which can be due to the elimination of the local mechanical strain or nonuniform pressure in them.

Koronovskyy, V. E. [Department of Radiophysics, Taras Shevchenko Kiev National University, 2 Prospekt Glushkova Street, 03127 Kiev (Ukraine)

2009-09-15

121

Temporary Arterial Balloon Occlusion as an Adjunct to Yttrium-90 Radioembolization  

SciTech Connect

Purpose. This study was designed to describe the technique of arterial occlusion using a temporary occlusion balloon system as an alternative to coil occlusion during Yttrium-90 radioembolization of hepatic tumors. Methods. Review of charts, angiography, and follow-up imaging studies of consecutive patients undergoing oncological embolization procedures in which a HyperForm system (ev3 Neurovascular, Irvine, CA) was used. Intraprocedural target vessel occlusion and patency of the target vessel on follow-up were recorded. Clinical data and Bremsstrahlung scans were reviewed for evidence of nontarget embolization. Results. Four radioembolization procedures were performed in three patients (all female, age 48-54 (mean 52) years). Five arteries were temporarily occluded (three gastroduodenal arteries, one right gastric artery, and one cystic artery). All radioembolization procedures were successfully completed. Follow-up imaging (either digital subtraction angiography (DSA) or computed tomography angiography (CTA)) was available for all patients between 28-454 (mean 183) days following the procedure, demonstrating all five vessels to be patent. No clinical or imaging evidence for nontarget embolization was found. Conclusions. Temporary balloon occlusion of small and medium-sized arteries during radioembolization allows safe therapy with preserved postprocedural vessel patency on early and midterm follow-up.

Hagspiel, Klaus D., E-mail: kdh2n@virginia.edu [University of Virginia Health System, Department of Radiology and Medical Imaging (United States); Nambiar, Ashwin, E-mail: uvashwin@gmail.com [SUNY Downstate Medical Center, Department of Radiology (United States); Hagspiel, Lauren M., E-mail: lmh4gg@virginia.edu [University of Virginia, College of Arts and Sciences (United States); Ahmad, Ehab Ali, E-mail: ehabradiodiagnosis@yahoo.com [Minia University, Department of Radiology (Egypt); Bozlar, Ugur, E-mail: ubozlar@yahoo.com [Gulhane Military Medical Academy, Department of Radiology (Turkey)

2013-06-15

122

47 CFR 80.88 - Secrecy of communication.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Secrecy of communication. 80.88 Section 80.88 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY...Procedures-General § 80.88 Secrecy of communication. The station licensee,...

2010-10-01

123

28 CFR 115.88 - Data review for corrective action.  

Code of Federal Regulations, 2012 CFR

...for corrective action. 115.88 Section 115.88 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) PRISON RAPE ELIMINATION ACT NATIONAL STANDARDS Standards for Adult Prisons and Jails Data Collection and Review § 115.88...

2012-07-01

124

28 CFR 115.88 - Data review for corrective action.  

Code of Federal Regulations, 2013 CFR

...for corrective action. 115.88 Section 115.88 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) PRISON RAPE ELIMINATION ACT NATIONAL STANDARDS Standards for Adult Prisons and Jails Data Collection and Review § 115.88...

2013-07-01

125

21 CFR 312.88 - Safeguards for patient safety.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Safeguards for patient safety. 312.88 Section 312.88 Food and Drugs ...Severely-debilitating Illnesses § 312.88 Safeguards for patient safety. All of the safeguards incorporated within...

2010-04-01

126

21 CFR 526.88 - Amoxicillin trihydrate for intramammary infusion.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Amoxicillin trihydrate for intramammary infusion. 526.88 Section 526.88 Food and Drugs FOOD...DRUGS § 526.88 Amoxicillin trihydrate for intramammary infusion. (a) Specifications. Each single dose syringe...

2011-04-01

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21 CFR 526.88 - Amoxicillin trihydrate for intramammary infusion.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Amoxicillin trihydrate for intramammary infusion. 526.88 Section 526.88 Food and Drugs FOOD...FORMS § 526.88 Amoxicillin trihydrate for intramammary infusion. (a) Specifications. Each single dose syringe...

2010-04-01

128

7 CFR 989.88 - Duration of immunities.  

Code of Federal Regulations, 2013 CFR

... 2013-01-01 false Duration of immunities. 989.88 Section 989.88 Agriculture...Miscellaneous Provisions § 989.88 Duration of immunities. The benefits, privileges, and immunities conferred upon any person by virtue of...

2013-01-01

129

7 CFR 981.88 - Duration of immunities.  

Code of Federal Regulations, 2014 CFR

... 2014-01-01 false Duration of immunities. 981.88 Section 981.88 Agriculture...Miscellaneous Provisions § 981.88 Duration of immunities. The benefits, privileges, and immunities conferred upon any person by virtue of...

2014-01-01

130

7 CFR 981.88 - Duration of immunities.  

Code of Federal Regulations, 2013 CFR

... 2013-01-01 false Duration of immunities. 981.88 Section 981.88 Agriculture...Miscellaneous Provisions § 981.88 Duration of immunities. The benefits, privileges, and immunities conferred upon any person by virtue of...

2013-01-01

131

7 CFR 989.88 - Duration of immunities.  

Code of Federal Regulations, 2012 CFR

... 2012-01-01 false Duration of immunities. 989.88 Section 989.88 Agriculture...Miscellaneous Provisions § 989.88 Duration of immunities. The benefits, privileges, and immunities conferred upon any person by virtue of...

2012-01-01

132

7 CFR 981.88 - Duration of immunities.  

Code of Federal Regulations, 2012 CFR

... 2012-01-01 false Duration of immunities. 981.88 Section 981.88 Agriculture...Miscellaneous Provisions § 981.88 Duration of immunities. The benefits, privileges, and immunities conferred upon any person by virtue of...

2012-01-01

133

7 CFR 989.88 - Duration of immunities.  

Code of Federal Regulations, 2014 CFR

... 2014-01-01 false Duration of immunities. 989.88 Section 989.88 Agriculture...Miscellaneous Provisions § 989.88 Duration of immunities. The benefits, privileges, and immunities conferred upon any person by virtue of...

2014-01-01

134

7 CFR 989.88 - Duration of immunities.  

Code of Federal Regulations, 2010 CFR

... 2010-01-01 false Duration of immunities. 989.88 Section 989.88 Agriculture...Miscellaneous Provisions § 989.88 Duration of immunities. The benefits, privileges, and immunities conferred upon any person by virtue of...

2010-01-01

135

7 CFR 989.88 - Duration of immunities.  

Code of Federal Regulations, 2011 CFR

... 2011-01-01 false Duration of immunities. 989.88 Section 989.88 Agriculture...Miscellaneous Provisions § 989.88 Duration of immunities. The benefits, privileges, and immunities conferred upon any person by virtue of...

2011-01-01

136

7 CFR 981.88 - Duration of immunities.  

Code of Federal Regulations, 2011 CFR

... 2011-01-01 false Duration of immunities. 981.88 Section 981.88 Agriculture...Miscellaneous Provisions § 981.88 Duration of immunities. The benefits, privileges, and immunities conferred upon any person by virtue of...

2011-01-01

137

7 CFR 981.88 - Duration of immunities.  

Code of Federal Regulations, 2010 CFR

... 2010-01-01 false Duration of immunities. 981.88 Section 981.88 Agriculture...Miscellaneous Provisions § 981.88 Duration of immunities. The benefits, privileges, and immunities conferred upon any person by virtue of...

2010-01-01

138

21 CFR 312.88 - Safeguards for patient safety.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 2011-04-01 false Safeguards for patient safety. 312.88 Section 312.88 Food and Drugs ...Severely-debilitating Illnesses § 312.88 Safeguards for patient safety. All of the safeguards incorporated within...

2011-04-01

139

21 CFR 312.88 - Safeguards for patient safety.  

Code of Federal Regulations, 2014 CFR

...2014-04-01 2014-04-01 false Safeguards for patient safety. 312.88 Section 312.88 Food and Drugs ...Severely-debilitating Illnesses § 312.88 Safeguards for patient safety. All of the safeguards incorporated within...

2014-04-01

140

21 CFR 312.88 - Safeguards for patient safety.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 2012-04-01 false Safeguards for patient safety. 312.88 Section 312.88 Food and Drugs ...Severely-debilitating Illnesses § 312.88 Safeguards for patient safety. All of the safeguards incorporated within...

2012-04-01

141

21 CFR 312.88 - Safeguards for patient safety.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 false Safeguards for patient safety. 312.88 Section 312.88 Food and Drugs ...Severely-debilitating Illnesses § 312.88 Safeguards for patient safety. All of the safeguards incorporated within...

2013-04-01

142

Characteristics of yttrium oxide laser ceramics with additives  

NASA Astrophysics Data System (ADS)

Neodymium- or ytterbium-doped laser ceramics with a disordered crystal-field structure formed by introduction of iso- and heterovalent elements into yttrium oxide are studied. It is shown that these additives broaden the spectral band of laser transitions, which makes it possible to use ceramics as active laser media emitting ultrashort pulses. Lasing was obtained in several samples of this ceramics. At the same time, it is shown that addition of zirconium and hafnium stimulates the Förster quenching of upper laser levels and pump levels.

Osipov, V. V.; Solomonov, V. I.; Orlov, A. N.; Shitov, V. A.; Maksimov, R. N.; Spirina, A. V.

2013-03-01

143

Tetra­yttrium(III) tris­ulfide disilicate  

PubMed Central

Tetra­yttrium(III) tris­ulfide disilicate, Y4S3(Si2O7), crystallizes in the Sm4S3(Si2O7) structure type. The structure consists of isolated (Si2O7)6? units (2mm. symmetry) and two crystallo­graphically independent Y3+ cations bridged by one S and one O atom. The first Y atom (site symmetry .m.) is coordinated by three O atoms and three S atoms in a trigonal–prismatic arrangement whereas the second Y atom (site symmetry ..2) is coordinated by six O atoms and three S atoms in a tricapped trigonal–prismatic arrangement. PMID:21522813

Koscielski, Lukasz A.; Ibers, James A.

2011-01-01

144

Characteristics of yttrium oxide laser ceramics with additives  

SciTech Connect

Neodymium- or ytterbium-doped laser ceramics with a disordered crystal-field structure formed by introduction of iso- and heterovalent elements into yttrium oxide are studied. It is shown that these additives broaden the spectral band of laser transitions, which makes it possible to use ceramics as active laser media emitting ultrashort pulses. Lasing was obtained in several samples of this ceramics. At the same time, it is shown that addition of zirconium and hafnium stimulates the Foerster quenching of upper laser levels and pump levels. (extreme light fields and their applications)

Osipov, V V; Solomonov, V I; Orlov, A N; Shitov, V A; Maksimov, R N; Spirina, A V [Institute of Electrophysics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg (Russian Federation)

2013-03-31

145

Knee arthroscopy after yttrium or osmic acid injection  

SciTech Connect

This study presents the macroscopic and histologic results of 35 knee arthroscopies performed on patients with rheumatoid arthritis, some months after an yttrium or osmic acid intraarticular injection. The procedure was most often performed after a failure of the injection or a relapse of synovitis. Arthroscopy provides an understanding of the cause of synoviorthesis failure--insufficient action of the product on the synovitis or its poor diffusion, fibri-nonecrotic deposits, or cartilaginous lesions--and may be used both diagnostically and therapeutically.

Guaydier-Souquieres, C.; Beguin, J.; Ollivier, D.; Loyau, G.

1989-01-01

146

Damping in Yttrium Iron Garnet Nanoscale Films Capped by Platinum  

NASA Astrophysics Data System (ADS)

Strong damping enhancement in nm-thick yttrium iron garnet (YIG) films due to Pt capping layers was observed. This damping is substantially larger than the expected damping due to conventional spin pumping, is accompanied by a shift in the ferromagnetic resonance field, and can be suppressed by the use of a Cu spacer in between the YIG and Pt films. The data indicate that such damping may originate from the ferromagnetic ordering in Pt atomic layers near the YIG/Pt interface and the dynamic exchange coupling between the ordered Pt spins and the spins in the YIG film.

Sun, Yiyan; Chang, Houchen; Kabatek, Michael; Song, Young-Yeal; Wang, Zihui; Jantz, Michael; Schneider, William; Wu, Mingzhong; Montoya, E.; Kardasz, B.; Heinrich, B.; te Velthuis, Suzanne G. E.; Schultheiss, Helmut; Hoffmann, Axel

2013-09-01

147

Damping in yttrium iron garnet nanoscale films capped by platinum.  

PubMed

Strong damping enhancement in nm-thick yttrium iron garnet (YIG) films due to Pt capping layers was observed. This damping is substantially larger than the expected damping due to conventional spin pumping, is accompanied by a shift in the ferromagnetic resonance field, and can be suppressed by the use of a Cu spacer in between the YIG and Pt films. The data indicate that such damping may originate from the ferromagnetic ordering in Pt atomic layers near the YIG/Pt interface and the dynamic exchange coupling between the ordered Pt spins and the spins in the YIG film. PMID:25166689

Sun, Yiyan; Chang, Houchen; Kabatek, Michael; Song, Young-Yeal; Wang, Zihui; Jantz, Michael; Schneider, William; Wu, Mingzhong; Montoya, E; Kardasz, B; Heinrich, B; te Velthuis, Suzanne G E; Schultheiss, Helmut; Hoffmann, Axel

2013-09-01

148

Lattice parameter and luminescence properties of europium activated yttrium oxide  

NASA Astrophysics Data System (ADS)

Samples of yttrium oxide doped with trivalent europium have been prepared by ceramic techniques, under different synthesis conditions; barium chloride (BaCl 2) and sodium tetraborate (Na 2B 4O 7) were tested as flux. The improvement of luminescence properties in dependence on substitution of Eu 3+ for Y 3+ in the host lattice, under electron and UV excitations is demonstrated. The lattice parameter as a quantitative assessment of activator incorporation degree is proposed. The obtained results are discussed with respect to the employed processing method.

Nazarov, M. V.; Kang, J. H.; Jeon, D. Y.; Popovici, E.-J.; Muresan, L.; Tsukerblat, B. S.

2005-01-01

149

Granulometric composition of a luminophor based on yttrium oxide  

SciTech Connect

The authors tested ammonium, lithium, potassium, and sodium fluorides, chlorides, sulfates, phosphates, and pyrophosphates; calcium, strontium, and barium fluorides, and sodium tetraborate in amounts from 1 to 25% as fluxes. Yttrium and europium oxides, brands ITO-MGr and EiO-1, were used as the starting materials in the synthesis. The photometric characteristics of the luminophors were measured and other methods used in the investigation were thermographic and x-ray phase analysis. It is shown that with a concentration of flux greater than 5%, the intensity and brightness of the luminescence decreases slightly. The granulometric composition of the luminophors after crystallization with the fluxes in optimum conditions is reported.

Smirdova, N.I.; Chau, P.T.; Efryushina, N.P.; Ermakova, S.V.; Parasovchenko, O.G.

1986-05-01

150

Striatal GPR88 expression is confined to the whole projection neuron population and is regulated by dopaminergic and glutamatergic afferents.  

PubMed

GPR88, an orphan G protein-coupled receptor, was designated Strg/GPR88 for striatum-specific G protein-coupled receptor (K. Mizushima et al. (2000)Genomics, 69, 314-321). In this study, we focused on striatal GPR88 protein localization using a polyclonal antibody. We established that the distribution of immunoreactivity in rat brain matched that of GPR88 transcripts and provided evidence for its exclusive neuronal expression. GPR88 protein is abundant throughout the striatum of rat and primate, with expression limited to the two subsets of striatal projection medium spiny neurons (MSNs) expressing preprotachykinin-substance P or preproenkephalin mRNAs. Ultrastructural immunolabelling revealed the GPR88 concentration at post-synaptic sites along the somatodendritic compartments of MSNs, with pronounced preference for dendrites and dendritic spines. The GPR88-rich expression, in both striatal output pathways, designates this receptor as a potential therapeutic target for diseases involving dysfunction of the basal ganglia, such as Parkinson's disease. Hence, we investigated changes of GPR88 expression in a model of Parkinson's disease (unilateral 6-hydroxydopamine-lesioned rats) following repeated L-DOPA treatment. In dopamine-depleted striatum, GPR88 expression was differentially regulated, i.e. decreased in striatopallidal and increased in striatonigral MSNs. L-DOPA treatment led to a normalization of GPR88 levels through dopamine D1 and D2 receptor-mediated mechanisms in striatopallidal and striatonigral MSNs, respectively. Moreover, the removal of corticostriatal inputs, by ibotenate infusion, downregulated GPR88 in striatopallidal MSNs. These findings provide the first evidence that GPR88 is confined to striatal MSNs and indicate that L-DOPA-mediated behavioural effects in hemiparkinsonian rats may involve normalization of striatal GPR88 levels probably through dopamine receptor-mediated mechanisms and modulations of corticostriatal pathway activity. PMID:19656174

Massart, Renaud; Guilloux, Jean-Philippe; Mignon, Virginie; Sokoloff, Pierre; Diaz, Jorge

2009-08-01

151

Nanoscale fullerene compression of an yttrium carbide cluster.  

PubMed

The nanoscale parameters of metal clusters and lattices have a crucial influence on the macroscopic properties of materials. Herein, we provide a detailed study on the size and shape of isolated yttrium carbide clusters in different fullerene cages. A family of diyttrium endohedral metallofullerenes with the general formula of Y(2)C(2n) (n = 40-59) are reported. The high field (13)C nuclear magnetic resonance (NMR) and density functional theory (DFT) methods are employed to examine this yttrium carbide cluster in certain family members, Y(2)C(2)@D(5)(450)-C(100), Y(2)C(2)@D(3)(85)-C(92), Y(2)C(2)@C(84), Y(2)C(2)@C(3v)(8)-C(82), and Y(2)C(2)@C(s)(6)-C(82). The results of this study suggest that decreasing the size of a fullerene cage with the same (Y(2)C(2))(4+) cluster results in nanoscale fullerene compression (NFC) from a nearly linear stretched geometry to a constrained "butterfly" structure. The (13)C NMR chemical shift and scalar (1)J(YC) coupling parameters provide a very sensitive measure of this NFC effect for the (Y(2)C(2))(4+) cluster. The crystal structural parameters of a previously reported metal carbide, Y(2)C(3) are directly compared to the (Y(2)C(2))(4+) cluster in the current metallofullerene study. PMID:22497289

Zhang, Jianyuan; Fuhrer, Tim; Fu, Wujun; Ge, Jiechao; Bearden, Daniel W; Dallas, Jerry; Duchamp, James; Walker, Kenneth; Champion, Hunter; Azurmendi, Hugo; Harich, Kim; Dorn, Harry C

2012-05-23

152

Effects of hepatic arterial yttrium 90 glass microspheres in dogs.  

PubMed

A 22-micron glass microsphere called TheraSphere (Theragenics Corp., Atlanta, GA) has been developed in which yttrium 89 oxide is incorporated into the glass matrix and is activated by neutron bombardment to form the beta-emitting isotope yttrium 90 (Y 90) before using the spheres as radiotherapeutic vehicles. The injection of up to 12 times (on a liver weight basis) the anticipated human dose of nonradioactive TheraSphere into the hepatic arteries of dogs was well tolerated and produced clinically silent alterations within centrolobular areas. The hepatic arterial (HA) injection of radioactive TheraSphere also produced portal changes similar to those observed in humans after external beam therapy. While the extent of damage increased with the delivered dose, radiation exposures in excess of 30,000 cGy did not cause total hepatic necrosis and were compatible with survival. No microspheres distributed to the bone marrow and absolutely no myelosuppression was encountered in any animal. Proposed hepatic exposures to humans of 5000 to 10,000 cGy by means of these microspheres, therefore, would appear to be feasible and tolerable. Radiotherapeutic microsphere administration preceded by regional infusion of a radiosensitizing agent and/or immediately following the redistribution of blood flow toward intrahepatic tumor by vasoactive agents can potentially yield a synergistic, highly selective attack on tumors confined to the liver. PMID:3345490

Wollner, I; Knutsen, C; Smith, P; Prieskorn, D; Chrisp, C; Andrews, J; Juni, J; Warber, S; Klevering, J; Crudup, J

1988-04-01

153

Yttrium oxide based three dimensional metamaterials for visible light cloaking  

NASA Astrophysics Data System (ADS)

Metamaterial with negative refractive index is the key phenomenon behind the concept of a cloaking device to hide an object from light in visible spectrum. Metamaterials made of two and three dimensional lattices of periodically placed electromagnetic resonant cells can achieve absorption and propagation of incident electromagnetic radiation as confined electromagnetic fields confined to a waveguide as surface plasmon polaritons, which can be used for shielding an object from in-tune electromagnetic radiation. The periodicity and dimensions of resonant cavity determine the frequency, which are very small as compared to the wavelength of incident light. Till now the phenomena have been demonstrated only for lights in near infrared spectrum. Recent advancements in fabrication techniques have made it possible to fabricate array of three dimensional nanostructures with cross-sections as small as 25 nm that are required for negative refractive index for wavelengths in visible light spectrum of 400-700 nm and for wider view angle. Two types of metamaterial designs, three dimensional concentric split ring and fishnet, are considered. Three dimensional structures consisted of metal-dielectric-metal stacks. The metal is silver and dielectric is yttrium oxide, other than conventional materials such as FR4 and Duroid. High ? dielectric and high refractive index as well as large crystal symmetry of Yttrium oxide has been investigated as encapsulating medium. Dependence of refractive index on wavelength and bandwidth of negative refractive index region are analyzed for application towards cloaking from light in visible spectrum.

Rai, Pratyush; Kumar, Prashanth S.; Varadan, Vijay K.; Ruffin, Paul; Brantley, Christina; Edwards, Eugene

2014-04-01

154

Magnetism in Mo-doped Yttrium Iron Garnet  

NASA Astrophysics Data System (ADS)

Yttrium iron garnet (YIG) is a synthetic garnet and ferrimagnetic, with chemical formula Y3Fe5O12. In YIG, five iron (III) ions occupy two octahedral and three tetrahedral sites, with the yttrium (III) ions coordinated by eight oxygen ions in an irregular cube. The iron ions in the two coordination sites exhibit different spins, resulting in magnetic behavior. Bulk YIG has been synthesized systematically by solid state reaction method. The formation of pure YIG have been investigated through X-ray diffraction (XRD) beginning from weighing in molar proportions of Y2O3 and Fe2O3, mixing and grinding, pre-sintering and final sintering at 1300 ^oC. XRD study shows that YIG exhibits cubic structure with lattice constant of about 12 å. Magnetization with varying field and temperature has been measured using a SQUID magnetometer. Magnetic measurement of Mo YIG has shown that magnetic moment increase initially and then decreases with Mo doping. Detailed results will be discussed in this presentation. This work is supported by National Science Foundation (Award Number DMR-0907037).

Khanra, S.; Kolekar, Y.; Langhoff, M.; Kahol, P.; Ghosh, K.

2013-03-01

155

Recovery of yttrium from cathode ray tubes and lamps' fluorescent powders: experimental results and economic simulation.  

PubMed

In this paper, yttrium recovery from fluorescent powder of lamps and cathode ray tubes (CRTs) is described. The process for treating these materials includes the following: (a) acid leaching, (b) purification of the leach liquors using sodium hydroxide and sodium sulfide, (c) precipitation of yttrium using oxalic acid, and (d) calcinations of oxalates for production of yttrium oxides. Experimental results have shown that process conditions necessary to purify the solutions and recover yttrium strongly depend on composition of the leach liquor, in other words, whether the powder comes from treatment of CRTs or lamp. In the optimal experimental conditions, the recoveries of yttrium oxide are about 95%, 55%, and 65% for CRT, lamps, and CRT/lamp mixture (called MIX) powders, respectively. The lower yields obtained during treatments of MIX and lamp powders are probably due to the co-precipitation of yttrium together with other metals contained in the lamps powder only. Yttrium loss can be reduced to minimum changing the experimental conditions with respect to the case of the CRT process. In any case, the purity of final products from CRT, lamps, and MIX is greater than 95%. Moreover, the possibility to treat simultaneously both CRT and lamp powders is very important and interesting from an industrial point of view since it could be possible to run a single plant treating fluorescent powder coming from two different electronic wastes. PMID:23831004

Innocenzi, V; De Michelis, I; Ferella, F; Vegliò, F

2013-11-01

156

Study of yttrium containing bioactive glasses behaviour in simulated body fluid.  

PubMed

The influence of yttrium oxide on the bioactivity of glasses in the system SiO(2)-Na(2)O-P(2)O(5)-CaO-B(2)O(3)-K(2)O-MgO was studied in a simulated body fluid (SBF). Two series of glasses with different bioactivity were investigated. The reaction layers formed on the surface of the exposed glasses were evaluated by means of back scattered electron imaging of scanning electron microscopy equipped with energy dispersive X-ray analysis (BEI-SEM/EDXA). The concentration of Y, Ca and P released from the glasses into SBF, during 21 days was determined using inductively coupled plasma-emission spectroscopy ICP-AES and inductively coupled plasma-mass spectroscopy ICP-MS. Introducing yttrium in the selected bioactive glass tended to diminish the bioactivity of the glasses. The thickness of the calcium phosphate layer decreased with increasing yttrium oxide content. The same effect was also observed when yttrium oxide partially replaced only calcium, magnesium and phosphorous oxide in the precursor glass. The data show that we can produce bioactive glasses with yttrium oxide as a component. By suitable tailoring of the rest of the glasses the yttrium effect on the glass behavior in SBF should be possible to control and thus produce yttrium containing glasses with desired bioactivity. PMID:16897163

Cacaina, D; Ylänen, H; Hupa, M; Simon, S

2006-08-01

157

Recovery of yttrium from fluorescent powder of cathode ray tube, CRT: Zn removal by sulphide precipitation.  

PubMed

This work is focused on the recovery of yttrium and zinc from fluorescent powder of cathode ray tube (CRT). Metals are extracted by sulphuric acid in the presence of hydrogen peroxide. Leaching tests are carried out according to a 2(2) full factorial plan and the highest extraction yields for yttrium and zinc equal to 100% are observed under the following conditions: 3M of sulphuric acid, 10% v/v of H2O2 concentrated solution at 30% v/v, 10% w/w pulp density, 70°C and 3h of reaction. Two series of precipitation tests for zinc are carried out: a 2(2) full factorial design and a completely randomized factorial design. In these series the factors investigated are pH of solution during the precipitation and the amount of sodium sulphide added to precipitate zinc sulphide. The data of these tests are used to describe two empirical mathematical models for zinc and yttrium precipitation yields by regression analysis. The highest precipitation yields for zinc are obtained under the following conditions: pH equal to 2-2.5% and 10-12%v/v of Na2S concentrated solution at 10%w/v. In these conditions the coprecipitation of yttrium is of 15-20%. Finally further yttrium precipitation experiments by oxalic acid on the residual solutions, after removing of zinc, show that yttrium could be recovered and calcined to obtain the final product as yttrium oxide. The achieved results allow to propose a CRT recycling process based on leaching of fluorescent powder from cathode ray tube and recovery of yttrium oxide after removing of zinc by precipitation. The final recovery of yttrium is 75-80%. PMID:23910246

Innocenzi, Valentina; De Michelis, Ida; Ferella, Francesco; Beolchini, Francesca; Kopacek, Bernd; Vegliò, Francesco

2013-11-01

158

Recovery of yttrium from cathode ray tubes and lamps’ fluorescent powders: experimental results and economic simulation  

SciTech Connect

Highlights: • Fluorescent powder of lamps. • Fluorescent powder of cathode ray rubes. • Recovery of yttrium from fluorescent powders. • Economic simulation for the processes to recover yttrium from WEEE. - Abstract: In this paper, yttrium recovery from fluorescent powder of lamps and cathode ray tubes (CRTs) is described. The process for treating these materials includes the following: (a) acid leaching, (b) purification of the leach liquors using sodium hydroxide and sodium sulfide, (c) precipitation of yttrium using oxalic acid, and (d) calcinations of oxalates for production of yttrium oxides. Experimental results have shown that process conditions necessary to purify the solutions and recover yttrium strongly depend on composition of the leach liquor, in other words, whether the powder comes from treatment of CRTs or lamp. In the optimal experimental conditions, the recoveries of yttrium oxide are about 95%, 55%, and 65% for CRT, lamps, and CRT/lamp mixture (called MIX) powders, respectively. The lower yields obtained during treatments of MIX and lamp powders are probably due to the co-precipitation of yttrium together with other metals contained in the lamps powder only. Yttrium loss can be reduced to minimum changing the experimental conditions with respect to the case of the CRT process. In any case, the purity of final products from CRT, lamps, and MIX is greater than 95%. Moreover, the possibility to treat simultaneously both CRT and lamp powders is very important and interesting from an industrial point of view since it could be possible to run a single plant treating fluorescent powder coming from two different electronic wastes.

Innocenzi, V., E-mail: valentina.innocenzi1@univaq.it; De Michelis, I.; Ferella, F.; Vegliò, F.

2013-11-15

159

A solid target system with remote handling of irradiated targets for PET cyclotrons.  

PubMed

A solid target system was developed for a PET cyclotron. The system is compatible with many different target materials in the form of foils and electroplated/sputtered targets which makes it useful for production of a wide variety of different PET radionuclides. The target material is manually loaded into the system. Remote handling of irradiated target material is managed with a pneumatic piston and a vacuum technique which allows the targets to be dropped into a shielded transport container. To test the target performance, proton irradiations (12.8 MeV, 45 ?A) of monoisotopic yttrium foils (0.64 mm, direct water cooling) were performed to produce 89Zr. The yields were 2200±200 MBq (1 h, n=13) and 6300±65 MBq (3 h, n=3). PMID:25265518

Siikanen, J; Tran, T A; Olsson, T G; Strand, S-E; Sandell, A

2014-12-01

160

0145-6008/88/1201-01 19%2.00/0 ALCOHOLISM:CLINICAL AND EXPERIMENTALRFSEARCH  

E-print Network

0145-6008/88/1201-01 19%2.00/0 ALCOHOLISM:CLINICAL AND EXPERIMENTALRFSEARCH Vol. 12,No. 1 January/February 1988 Motor Performance in Detoxified Alcoholics James L. York, PhD and Irving was increasedmoreinalcoholics as target separation decreased. Female alcoholics displayed im- pairment in speed of movement

Biederman, Irving

161

Modification of aluminide coating with yttrium for improved resistance to corrosive erosion  

SciTech Connect

Aluminide coatings on a mild steel substrate were modified by using an oxygen-active element, yttrium, for improved resistance to corrosive erosion. The performance of the yttrium-containing coating during the following three erosion conditions was evaluated: dry sand erosion at different temperatures, erosion in a dilute NaCl slurry containing 30% silica sand, and erosion in a dilute H{sub 2}SO{sub 4} slurry containing 30% silica sand. Results of the study demonstrated that yttrium significantly improved the resistance of the aluminide coating to both corrosive erosion and dry sand erosion.

Zhang, T.; Luo, Y.; Li, D.Y.

1999-12-01

162

The effect of yttrium ion implantation on the sulphidation of incoloy 800H  

NASA Astrophysics Data System (ADS)

Previous work has shown the beneficial effect of yttrium implantation on the oxidation behaviour of chromium oxide forming alloys. Because of the limited applicability of Fe-Cr-Ni alloys in sulphur containing gases the effect of yttrium implantation on the sulphidation of Incoloy 800H was studied. In short time tests a significant improvement was observed upon implantation of about 10 16 yttrium ions/cm 2 if an oxidizing treatment was applied before exposition to the sulphiding environment. The explanation of this effect is probably similar to that proposed in the literature for the improved oxidation resistance.

Kort, J. H.; Fransen, T.; Gellings, P. J.

1986-03-01

163

Structural Characterization of Yttrium-Implanted Pure Iron and Steels Oxidized at High Temperature  

Microsoft Academic Search

Yttrium-implanted and unimplanted pure electrolytic iron, low-manganese and low-manganese–carbon steels were analyzed at high temperature (T=700°C) under oxygen partial pressure \\u000a$${\\\\text{P}}_{O_2 } = 0.04Pa$$\\u000a to observe their oxidation resistances. X-ray diffraction (XRD), reflected high-energy electron diffraction (RHEED), and glancing-angle X-ray diffraction (GAXRD) analyses performed on yttrium-implanted samples before high-temperature oxidation tests show that yttrium implantation promotes the formation of Y_2O_3,

E. Caudron; H. Buscail

2001-01-01

164

Preparation, structure, and in vitro chemical durability of yttrium phosphate microspheres for intra-arterial radiotherapy.  

PubMed

Chemically durable microspheres containing yttrium and/or phosphorus are useful for intra-arterial radiotherapy. In this study, we attempted to prepare yttrium phosphate (YPO?) microspheres with high chemical durability. YPO? microspheres with smooth surfaces and diameters of around 25 ?m were successfully obtained when gelatin droplets containing yttrium and phosphate ions were cooled and solidified in a water-in-oil emulsion and then heat-treated at 1100°C. The chemical durability of the heat-treated microspheres in a simulated body fluid at pH = 6 and 7 was high enough for clinical application of intra-arterial radiotherapy. PMID:21714075

Kawashita, Masakazu; Matsui, Naoko; Li, Zhixia; Miyazaki, Toshiki; Kanetaka, Hiroyasu

2011-10-01

165

Tritium dose overestimates by CAP88-PC.  

PubMed

The dose assessment software CAP88-PC may overestimate doses from tritium under some conditions. The overestimates are linked to three key assumptions implicit in the software that may not be immediately parent. The three assumptions are (1) the contribution of home grown food, (2) the distances at which food is produced, and (3) the number of people consuming locally produced food. PMID:9930839

Parks, B S

1999-02-01

166

45 CFR 88.1 - Purpose.  

Code of Federal Regulations, 2010 CFR

... Section 88.1 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL...DEPARTMENT OF HEALTH AND HUMAN SERVICES FUNDS DO...OR DISCRIMINATORY POLICIES OR PRACTICES ...section 245 of the Public Health Service...provisions protect the rights of health...

2010-10-01

167

Measurements of High Energy Neutron Spectrum (> 10 MeV) by Using Yttrium Foils in a U/Pb Assembly  

NASA Astrophysics Data System (ADS)

Study of deep subcritical electronuclear systems and radioactive waste transmutation using relativistic beams were performed. This work is a preliminary step toward the study of the physical properties of Accelerator Driven Systems, in which a deeply subcritical active core is irradiated by a pulsed beam of relativistic ions. The long-range goal of the project is to study the capabilities of such systems with a hard neutron spectrum, for transmutation of radioactive nuclear wastes. Two experimental assemblies, “Energy plus Transmutation” (2006-2009) and “Quinta” (2011-), were irradiated by 1 to 6 GeV deuteron beams using the JINR NUCLOTRON accelerator. The main difference between the two experimental setups is the spallation target - lead or natural uranium. We attempt to obtain neutron energy spectra inside the volume of these assemblies using threshold reactions in natural yttrium (89Y) foils. Some results from three different experiments are presented.

Bielewicz, M.; Strugalska-Gola, E.; Szuta, M.; Wojciechowski, A.; Kadykov, M.; Tyutyunnikov, S.

2014-05-01

168

Yttrium oxide thin films prepared under different oxygen-content atmospheres: microstructure and optical properties  

NASA Astrophysics Data System (ADS)

Yttrium oxide films were prepared on silicon wafers by reactive magnetron sputtering at different oxygen flow rates to investigate the microstructure and optical properties for desirable planar optical waveguiding applications. Under the different conditions of target surface, the deposition rate, structure, and optical properties have great changes. The deposition rate increases to the maximum, and then monotonically decreases. Oxygen content in films increases and the composition of films transforms from stoichiometry to an oxygen-rich state. Y2O3 films grow with the (222) preferred growth orientation at low oxygen flow rate, and then turn into the (622) orientation; the microstructure evolves from crystal structure to amorphous state as oxygen flow rate increases from 2 to 12 sccm. Sufficient oxygen makes films low-order structure and oxygen-rich films have poor crystallinity. Very smooth film has been obtained at oxygen flow rate of 12 sccm. The refractive index can be greatly modulated by the oxygen-content factor. It is convincing that the controllable structure and optical properties of Y2O3 films can be achieved by adjustment the oxygen flow rate for desired optical design and applications.

Lei, Pei; Zhu, Jiaqi; Zhu, Yuankun; Jiang, Chunzhu; Yin, Xunbo

2012-09-01

169

Microstructure and electrical characterizations of yttrium oxide and yttrium silicate thin films deposited by pulsed liquid-injection plasma-enhanced metal-organic chemical vapor deposition  

NASA Astrophysics Data System (ADS)

Results on yttrium oxide and yttrium silicate films elaborated by an innovative metal-organic chemical vapor deposition process combining plasma assistance and a liquid precursor supply setup are presented. Plasma assistance enables deposition at a much lower substrate temperature and the pulsed-liquid precursor source allows an accurate control of the injected reactive species. According to x-ray photoelectron spectroscopy (XPS) analyses, we show that ultrathin yttrium oxide deposition can be performed at temperature less than 380°C. Yttrium oxide films contain carbon contamination that can be reduced by increasing the deposition temperature. The plasma plays a key role in the deposition mechanisms and thus in the chemical structure of the films and of the interface. It is shown that the injection frequency, i.e., the reactive species incoming frequency, plays a significant role in the silicate and interface formation. A detailed study is presented using angle-resolved XPS. A high injection frequency limits the formation of SiO2 interfacial layer and also of the silicate and favors the growth of yttrium oxide. In addition, silicate formation also depends on the deposition temperature. Electrical results show that as-deposited film at 350°C has a low leakage current (J <10-7width="0.3em"/>A/cm2) and a high breakdown field (˜8MV /cm).

Durand, C.; Dubourdieu, C.; Vallée, C.; Loup, V.; Bonvalot, M.; Joubert, O.; Roussel, H.; Renault, O.

2004-08-01

170

MYD88-independent growth and survival effects of Sp1 transactivation in Waldenstrom macroglobulinemia.  

PubMed

Sp1 transcription factor controls a pleiotropic group of genes and its aberrant activation has been reported in a number of malignancies, including multiple myeloma. In this study, we investigate and report its aberrant activation in Waldenström macroglobulinemia (WM). Both loss of and gain of Sp1 function studies have highlighted a potential oncogenic role of Sp1 in WM. We have further investigated the effect of a small molecule inhibitor, terameprocol (TMP), targeting Sp1 activity in WM. Treatment with TMP inhibited the growth and survival and impaired nuclear factor-?B and signal transducer and activator of transcription activity in WM cells. We next investigated and observed that TMP treatment induced further inhibition of WM cells in MYD88 knockdown WM cells. Moreover, we observed that Bruton's tyrosine kinase, a downstream target of MYD88 signaling pathway, is transcriptionally regulated by Sp1 in WM cells. The combined use of TMP with Bruton's tyrosine kinase or interleukin-1 receptor-associated kinase 1 and 4 inhibitors resulted in a significant and synergistic dose-dependent antiproliferative effect in MYD88-L265P-expressing WM cells. In summary, these results demonstrate Sp1 as an important transcription factor that regulates proliferation and survival of WM cells independent of MYD88 pathway activation, and provide preclinical rationale for clinical development of TMP in WM alone or in combination with inhibitors of MYD88 pathway. PMID:24622324

Fulciniti, Mariateresa; Amodio, Nicola; Bandi, Rajya Lakshmi; Munshi, Mansa; Yang, Guang; Xu, Lian; Hunter, Zachary; Tassone, Pierfrancesco; Anderson, Kenneth C; Treon, Steven P; Munshi, Nikhil C

2014-04-24

171

C5a receptor (CD88) blockade protects against MPO-ANCA GN.  

PubMed

Necrotizing and crescentic GN (NCGN) with a paucity of glomerular immunoglobulin deposits is associated with ANCA. The most common ANCA target antigens are myeloperoxidase (MPO) and proteinase 3. In a manner that requires activation of the alternative complement pathway, passive transfer of antibodies to mouse MPO (anti-MPO) induces a mouse model of ANCA NCGN that closely mimics human disease. Here, we confirm the importance of C5aR/CD88 in the mediation of anti-MPO-induced NCGN and report that C6 is not required. We further demonstrate that deficiency of C5a-like receptor (C5L2) has the reverse effect of C5aR/CD88 deficiency and results in more severe disease, indicating that C5aR/CD88 engagement enhances inflammation and C5L2 engagement suppresses inflammation. Oral administration of CCX168, a small molecule antagonist of human C5aR/CD88, ameliorated anti-MPO-induced NCGN in mice expressing human C5aR/CD88. These observations suggest that blockade of C5aR/CD88 might have therapeutic benefit in patients with ANCA-associated vasculitis and GN. PMID:24179165

Xiao, Hong; Dairaghi, Daniel J; Powers, Jay P; Ertl, Linda S; Baumgart, Trageen; Wang, Yu; Seitz, Lisa C; Penfold, Mark E T; Gan, Lin; Hu, Peiqi; Lu, Bao; Gerard, Norma P; Gerard, Craig; Schall, Thomas J; Jaen, Juan C; Falk, Ronald J; Jennette, J Charles

2014-02-01

172

MASKER MASKER TARGET TARGET TARGET  

E-print Network

from a large speech database (Ives et al,2005). The original speech is from one speaker Probabilitycorrect -6 dB 0 dB Listeners were presented with two phrases of concurrent speech syllables. The masker syllables coincided with the second and third target syllables. The speech syllables were taken

Ives, D. Timothy

173

Sorptive separation of yttrium and cerium on a weakly basic anionite  

NASA Astrophysics Data System (ADS)

The sorption of complex yttrium ions with Trilon B onto the weakly basic anionite D-403 in nitrate form from an acidic medium at pH 3 with constant ionic strength (NaNO3, 1 mol/kg) is investigated. A thermodynamic evaluation of the sorption isotherm of anionic yttrium complexes is performed using a method based on the linearization of the equation of the law of active mass, modified for ionic exchange reactions. The ionic exchange constant, the Gibbs free energy of ionic exchange, the capacity of the anionite, and the sorption limit of ethylenediaminetetraacetatoyttrate ions (EDTA yttrate ions) are calculated. Using a frontal version of ion exchange chromatography, cerium and yttrium are separated on D-403 anionite with a fraction of pure yttrium at the column outlet of no less than 30%.

Cheremisina, O. V.; Ponomareva, M. A.; Chirkst, D. E.; Lobacheva, O. L.; Shul'gin, I. A.

2015-01-01

174

Analytical chemistry of the Manhattan Project. Chapter XXVII. Scandium, yttrium, and rare earths  

Microsoft Academic Search

Various methods for separating the above elements from uranium and thorium are given; precipitation, extraction, and volatilization procedures are given in detail. Gravimetric and spectrophotometric methods for determining the individual rare earths and scandium and yttrium are discussed.

L. L. Quill; C. J. Rodden

2008-01-01

175

Performance of yttrium doped tungsten under ‘edge localized mode’-like loading conditions  

NASA Astrophysics Data System (ADS)

Spark plasma sintered tungsten grades, with an yttrium content varying between 0.25 and 1 wt%, were characterized and exposed to transient thermal loads. The samples were cyclic tested at room temperature applying 1 ms long heat pulses using a Nd:YAG laser beam and the electron beam facility JUDITH 1. The absorbed power density of these pulses varied between 0.37 and 1.14 GW m-2. The material modifications were analysed with scanning electron microscopy, optical microscopy and laser profilometry. Comparison showed an improvement of the thermal shock resistance with increasing yttrium content. Additionally, three samples were tested at an elevated base temperature at 400 °C. The two materials with highest yttrium content cracked, indicating still brittle behaviour at the elevated base temperature when adding yttrium.

Lemahieu, N.; Linke, J.; Pintsuk, G.; Van Oost, G.; Wirtz, M.; Zhou, Z.

2014-04-01

176

Photoinduced Magnetic Anisotropy and Optical Dichroism in Silicon-Doped Yttrium Iron Garnet  

Microsoft Academic Search

It has been found that an intense beam of linearly polarized light can induce a magnetic anisotropy in silicon-doped yttrium iron garnet at liquid-helium temperatures. Furthermore, there is associated with this anisotropy a substantial linear dichroism.

J. F. Dillon; E. M. Gyorgy; J. P. Remeika

1969-01-01

177

Celiac Artery Stenting to Facilitate Hepatic Yttrium-90 Radioembolization Therapy  

PubMed Central

Radioembolization offers a novel way to treat the nonresectable, liver predominant hepatic malignancies with better tumor response and overall progression-free survival rates. Transarterial catheter-based radioembolization procedure involves the hepatic arterial administration of glass- or resin-based beta emitting Yttirum-90 microspheres. Safe delivery of the tumoricidal radiation dose requires careful angiogram planning and coil embolization to quantify lung shunting and prevent systemic toxicity, respectively. Diagnostic pretreatment angiogram also serves to identify the hepatic arterial variant anatomy and other coexisting pathologies that might require a different or alternative approach. We describe a complex case of celiac artery stenosis with tortuous pancreaticoduodenal arterial arcade precluding access to the right hepatic artery for performing radioembolization. Celiac artery stenting of the stenosis was performed to facilitate subsequent safe and successful Yttrium-90 microsphere radioembolization. PMID:23304610

Chamarthy, Murthy R.; Hughes, Terence W.; Gupta, Mohit; Vossen, Josephina A.; Velasco, Noel B.; Zinn, Kenneth M.

2012-01-01

178

Local structure of oxygen-deficient Yttrium oxide  

NASA Astrophysics Data System (ADS)

Yttrium oxide thin films have been deposited on Si (100) substrate by using pulsed laser deposition (PLD) method. X-ray diffraction (XRD), hard and soft X-ray absorption spectroscopy (XAFS) are employed to investigate the origin of oxygen vacancies and their influence on the structure and atomic distributions. The XRD results indicate that the Y2O3 thin films strongly orient the (111) axis of the cubic structure. Analyses on the Y K-edge extended X-ray absorption fine structures reveal that the coordination number of Y atoms decreases and the bond length of Y-O contracts due to the loss of oxygen atoms. The X-ray absorption near edge structure analysis together with a theoretical approach further confirms the oxygen vacancies formation and their possible location.

Cheng, Xue-Rui; Dai, Hai-Yang; Qi, Ze-Ming; Wang, Yu-Yin; Zhang, Guo-Bin

2013-09-01

179

Novel light emissive yttrium-based nanoparticles and composites  

NASA Astrophysics Data System (ADS)

Yttrium-based inorganic optical materials generally are of practical interest for three applications: solid state lighting/displays, lasers, and scintillators. Solid-state lighting is particularly desirable commercially for its efficiency and lifetime compared to traditional incandescent alternatives. This type of lighting technology is of increasing interest as incandescent light bulbs are being gradually phased-out due to government regulations on maximum wattage of these devices. Additionally, shortcomings in the current state of the art have driven the need for a more thermally stable material for use in this area. In this dissertation, we develop and characterize a novel composite material consisting of optically active yttrium-based nanoparticles doped into silica sol-gels. For lighting and display applications, low-cost, low-temperature synthesis methods for materials that meet or exceed the quality of the materials currently on the market are highly desirable. During the course of this work, we discuss the characterization of yttrium-based nanoparticles with respect to their incorporation in a sol-gel matrix composite. We then prepared these composite materials using a variety of methods and assess their quality according to a set of selection criteria and for lighting/display applications. Novel light-emitting composites consisting of Ce:YAG or Eu:Y2O 3 (yttria) nanoparticles in an inorganic medium were successfully developed and characterized. The optical properties of the nanoparticles were maintained when incorporated into the sol-gel medium and were shown to be comparable with the current state of the art. Comparison was made between the nanoparticle emission and the composite emission and, in the case of the Ce:YAG, the CIE coordinates, showing no change between the emission intensities or peak locations. We successfully demonstrated the conversion of fluoride-based particles into Y2O3 during sol-gel processing and demonstrated that no reaction took place between the nanoparticles and the sol-gel medium. Stability of nanoparticles in suspension was overcome through the control of pH during sol-gel synthesis. Through both base- and/or acid-catalysis, we produced optically active nanoparticle doped sol-gel composites containing YAG and Yttria. Our results indicated no detrimental effect on the nanoparticles upon incorporation into the sol-gel matrix; this was demonstrated through XRD, where no silicate phases were observed, through EDX, where we saw no diffusion of yttrium into the sol-gel and no silicon diffusing into the nanoparticles, and through photoluminescence, where emissions were consistent with that of the as-made nanoparticles. These results led us to theorize that the nanoparticles, rather than being bonded to the matrix, are seated in the void space that is prevalent in sol-gel systems. Additionally, these materials are stable at much higher temperatures than current resin-based systems.

Hill, Laura Burka

180

Structural and dielectric properties of yttrium-substituted hydroxyapatites.  

PubMed

Hydroxyapatite (HAp) samples doped with 0, 2 and 4at.% of yttrium (Y) were characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy attached with energy dispersive X-ray (EDX) spectroscopy, antimicrobial activity tests and dielectric studies. The hydroxyl groups observed in FTIR spectra confirmed the formation of HAp phase in the studied samples. The crystallite size, crystallinity degree and lattice parameters of the samples were changed with Y content. The volume of the unit cell was gradually decreased with the addition of Y. Undoped and Y-containing HAp samples were screened to determine their in vitro antimicrobial activities against the standard strains. It was found that no samples have any antimicrobial effect. The relative dielectric permittivity and dielectric loss are affected by Y content. While the alternating current conductivity increases with increasing frequency, it decreases with increasing Y content. PMID:25492204

Kaygili, Omer; Dorozhkin, Sergey V; Ates, Tankut; Canan Gursoy, N; Keser, Serhat; Yakuphanoglu, Fahrettin; Birkan Selçuk, A

2015-02-01

181

Ferromagnetic resonance of sputtered yttrium iron garnet nanometer films  

SciTech Connect

Growth of nm-thick yttrium iron garnet (YIG) films by sputtering and ferromagnetic resonance (FMR) properties in the films were studied. The FMR linewidth of the YIG film decreased as the film thickness was increased from several nanometers to about 100?nm. For films with very smooth surfaces, the linewidth increased linearly with frequency. In contrast, for films with big grains on the surface, the linewidth-frequency response was strongly nonlinear. Films in the 7–26?nm thickness range showed a surface roughness between 0.1?nm and 0.4?nm, a 9.48-GHz FMR linewidth in the 6–10?Oe range, and a damping constant of about 0.001.

Liu, Tao [Department of Physics, Colorado State University, Fort Collins, Colorado 80523 (United States); State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054 (China); Chang, Houchen; Sun, Yiyan; Kabatek, Michael; Wu, Mingzhong, E-mail: mwu@lamar.colostate.edu [Department of Physics, Colorado State University, Fort Collins, Colorado 80523 (United States); Vlaminck, Vincent; Hoffmann, Axel [Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Deng, Longjiang [State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054 (China)

2014-05-07

182

Rare Earth Doped Yttrium Aluminum Garnet (YAG) Selective Emitters  

NASA Technical Reports Server (NTRS)

As a result of their electron structure, rare earth ions in crystals at high temperature emit radiation in several narrow bands rather than in a continuous blackbody manner. This study presents a spectral emittance model for films and cylinders of rare earth doped yttrium aluminum garnets. Good agreement between experimental and theoretical film spectral emittances was found for erbium and holmium aluminum garnets. Spectral emittances of films are sensitive to temperature differences across the film. For operating conditions of interest, the film emitter experiences a linear temperature variation whereas the cylinder emitter has a more advantageous uniform temperature. Emitter efficiency is also a sensitive function of temperature. For holminum aluminum garnet film the efficiency is 0.35 at 1446K but only 0.27 at 1270 K.

Chubb, Donald L.; Pal, AnnaMarie T.; Patton, Martin O.; Jenkins, Phillip P.

1999-01-01

183

Ferromagnetic resonance of sputtered yttrium iron garnet nanometer films  

NASA Astrophysics Data System (ADS)

Growth of nm-thick yttrium iron garnet (YIG) films by sputtering and ferromagnetic resonance (FMR) properties in the films were studied. The FMR linewidth of the YIG film decreased as the film thickness was increased from several nanometers to about 100 nm. For films with very smooth surfaces, the linewidth increased linearly with frequency. In contrast, for films with big grains on the surface, the linewidth-frequency response was strongly nonlinear. Films in the 7-26 nm thickness range showed a surface roughness between 0.1 nm and 0.4 nm, a 9.48-GHz FMR linewidth in the 6-10 Oe range, and a damping constant of about 0.001.

Liu, Tao; Chang, Houchen; Vlaminck, Vincent; Sun, Yiyan; Kabatek, Michael; Hoffmann, Axel; Deng, Longjiang; Wu, Mingzhong

2014-05-01

184

Recovery of yttrium from fluorescent powder of cathode ray tube, CRT: Zn removal by sulphide precipitation  

SciTech Connect

Highlights: • Treatment of fluorescent powder of CRT waste. • Factorial experimental designs to study acid leaching of fluorescent powder and the purification of leach liquors. • Recover of yttrium by precipitation using oxalic acid. • Suitable flowsheet to recover yttrium from fluorescent powder. - Abstract: This work is focused on the recovery of yttrium and zinc from fluorescent powder of cathode ray tube (CRT). Metals are extracted by sulphuric acid in the presence of hydrogen peroxide. Leaching tests are carried out according to a 2{sup 2} full factorial plan and the highest extraction yields for yttrium and zinc equal to 100% are observed under the following conditions: 3 M of sulphuric acid, 10% v/v of H{sub 2}O{sub 2} concentrated solution at 30% v/v, 10% w/w pulp density, 70 °C and 3 h of reaction. Two series of precipitation tests for zinc are carried out: a 2{sup 2} full factorial design and a completely randomized factorial design. In these series the factors investigated are pH of solution during the precipitation and the amount of sodium sulphide added to precipitate zinc sulphide. The data of these tests are used to describe two empirical mathematical models for zinc and yttrium precipitation yields by regression analysis. The highest precipitation yields for zinc are obtained under the following conditions: pH equal to 2–2.5% and 10–12% v/v of Na{sub 2}S concentrated solution at 10% w/v. In these conditions the coprecipitation of yttrium is of 15–20%. Finally further yttrium precipitation experiments by oxalic acid on the residual solutions, after removing of zinc, show that yttrium could be recovered and calcined to obtain the final product as yttrium oxide. The achieved results allow to propose a CRT recycling process based on leaching of fluorescent powder from cathode ray tube and recovery of yttrium oxide after removing of zinc by precipitation. The final recovery of yttrium is 75–80%.

Innocenzi, Valentina, E-mail: valentina.innocenzi1@univaq.it [Department of Industrial Engineering and Information and Economy, University of L’Aquila, Via Giovanni Gronchi n.18, Nucleo Ind.le di Pile, 67100 L’Aquila (Italy); De Michelis, Ida; Ferella, Francesco [Department of Industrial Engineering and Information and Economy, University of L’Aquila, Via Giovanni Gronchi n.18, Nucleo Ind.le di Pile, 67100 L’Aquila (Italy); Beolchini, Francesca [Department of Marine Sciences, Polytechnic Institute of Marche, Via Brecce Bianche, 60131 Ancona (Italy); Kopacek, Bernd [SAT, Austrian Society for Systems Engineering and Automation, Gurkasse 43/2, A-1140 Vienna (Austria); Vegliò, Francesco [Department of Industrial Engineering and Information and Economy, University of L’Aquila, Via Giovanni Gronchi n.18, Nucleo Ind.le di Pile, 67100 L’Aquila (Italy)

2013-11-15

185

Yttrium oxide transparent ceramics by low-temperature microwave sintering  

SciTech Connect

Graphical abstract: The figure shows the SEM photos of the surfaces of the Y{sub 2}O{sub 3} transparent ceramic samples obtained by microwave sintering and vacuum sintering. It is clearly demonstrated that the grain distribution of the vacuum sintering sample is not uniform with the smallest and the largest particle size at about 2 ?m and 15 ?m respectively, while the grain distribution of microwave sintering sample is uniform with the average diameter at about 2–4 ?m (the smallest reported so far) and with no abnormal growth-up or coarsening phenomenon. We have further found out that the smaller the grain size, the higher the mechanical and optical properties. Display Omitted Highlights: ? The microwave sintering temperature of the sample is lower compared with vacuum. ? The microwave sintering time of the sample is shorter compared with vacuum. ? The mechanical properties of the microwave sintering sample is improved greatly. ? The Y{sub 2}O{sub 3} grain of microwave sintering sample is the smallest reported so far. -- Abstract: Yttrium oxide (Y{sub 2}O{sub 3}) transparent ceramics samples have been successfully fabricated by microwave sintering processing at relatively low temperatures. In comparison with the vacuum sintering processing, Y{sub 2}O{sub 3} transparent ceramics can be obtained by microwave sintering at lower sintering temperature and shorter sintering time, and they possess higher transmittances and mechanical properties. The technologies of low-temperature microwave sintering and the relationships of the microstructures and properties of the specified samples have been investigated in detail. We have found out that the low-temperature microwave sintering technique has its obvious advantages over the conventional methods in manufacturing yttrium oxide transparent ceramics.

Luo, Junming, E-mail: ljmniat@126.com [School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063 (China)] [School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063 (China); Zhong, Zhenchen; Xu, Jilin [School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063 (China)] [School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063 (China)

2012-12-15

186

Antibacterial and antibiofilm properties of yttrium fluoride nanoparticles  

PubMed Central

Antibiotic resistance has prompted the search for new agents that can inhibit bacterial growth. Moreover, colonization of abiotic surfaces by microorganisms and the formation of biofilms is a major cause of infections associated with medical implants, resulting in prolonged hospitalization periods and patient mortality. In this study we describe a water-based synthesis of yttrium fluoride (YF3) nanoparticles (NPs) using sonochemistry. The sonochemical irradiation of an aqueous solution of yttrium (III) acetate tetrahydrate [Y(Ac)3 · (H2O)4], containing acidic HF as the fluorine ion source, yielded nanocrystalline needle-shaped YF3 particles. The obtained NPs were characterized by scanning electron microscopy and X-ray elemental analysis. NP crystallinity was confirmed by electron and powder X-ray diffractions. YF3 NPs showed antibacterial properties against two common bacterial pathogens (Escherichia coli and Staphylococcus aureus) at a ?g/mL range. We were also able to demonstrate that antimicrobial activity was dependent on NP size. In addition, catheters were surface modified with YF3 NPs using a one-step synthesis and coating process. The coating procedure yielded a homogeneous YF3 NP layer on the catheter, as analyzed by scanning electron microscopy and energy dispersive spectroscopy. These YF3 NP-modified catheters were investigated for their ability to restrict bacterial biofilm formation. The YF3 NP-coated catheters were able to significantly reduce bacterial colonization compared to the uncoated surface. Taken together, our results highlight the potential to further develop the concept of utilizing these metal fluoride NPs as novel antimicrobial and antibiofilm agents, taking advantage of their low solubility and providing extended protection. PMID:23152681

Lellouche, Jonathan; Friedman, Alexandra; Gedanken, Aharon; Banin, Ehud

2012-01-01

187

Development of Radioactive Kr beams at the 88-Inch Cyclotron*  

NASA Astrophysics Data System (ADS)

Motivated by interest in the nuclear structure community, work is in progress on a project to develop ^76Kr and ^79Kr beams using a "recyclotron" technique, in which the 88" Cyclotron is used both to produce and accelerate the radioactive species. This technique is feasible for these isotopes, in particular, because of their long half-lives, 15 hr and 1.5 d, respectively, and the fact that the Kr is gaseous and easily cryotrapped. The radioactive species will be made in a ^74Se(^4He,2n)^76Kr or ^78Se(^3He, 2n)^79Kr reaction using a Cu_2Se pellet target. After diffusion from the heated target, the Kr is transported to the BEARS cryotrapping system for ionization in the AECR-U ion source and for subsequent acceleration. Initial studies using natural Se have focused on demonstrating the feasibility of the technique and examining various aspects of the targetry, including production and release of the krypton and how to minimize the amount of enriched Se needed for the target.

McMahan, M. A.; Guthrie, Laura; Bernstein, Lee; Haustein, Peter; Joosten, Rainer; Larimer, Ruth-Mary; Norman, Eric; O'Niel, James; Rowe, Michael; Wutte, Daniela

1999-10-01

188

Growth of optical grade yttrium oxide single crystal via ceramic technology  

NASA Astrophysics Data System (ADS)

To sinter neodymium doped yttrium oxide (NDY) singe crystal several successive technologies: laser synthesis of NDY nanopowder, pulsed magnetic compacting of the powder and two stage vacuum sintering were used. With the help of abnormal grain growth samples of NDY single crystal were produced. Conditions that are necessary for abnormal grain growth in yttrium oxide as well to grow the optical grade single crystal are discussed.

Maxim, Ivanov; Irina, Vyukhina; Vladimir, Khrustov

2012-04-01

189

Fabrication of yttrium aluminum garnet transparent ceramics from yttria nanopowders synthesized by carbonate precipitation  

Microsoft Academic Search

Nanocrystalline yttria powders have been successfully synthesized by using yttrium nitrate as starting salt and ammonium hydrogen\\u000a carbonate as precipitant. It was found that a small amount of ammonia sulfate in the yttrium nitrate solution can effectively\\u000a reduce the agglomeration and the resultant powders display good dispersion. Pure cubic phase yttria powders were prepared\\u000a by calcining the precipitate at 1100 °C

Hua Gong; Dingyuan Tang; Hui Huang; Jan Ma

2009-01-01

190

Ferrimagnetic Resonance in Rare-Earth Doped Yttrium Iron Garnet. II. Terbium Substitution  

Microsoft Academic Search

The replacement of a small fraction of the yttrium ions in yttrium iron garnet by rare-earth ions produces large effects on the field for ferrimagnetic resonance at low temperatures. Detailed studies have been made on the effect of terbium substitution using concentrations from 0.01 to 0.19 at.%. The variation of the field for resonance as a function of applied field

J. F. Dillon; L. R. Walker

1961-01-01

191

Characterisation of bismuth-doped yttrium iron garnet layers prepared by sol–gel process  

Microsoft Academic Search

Yttrium iron garnets and Bi-substituted yttrium iron garnets were prepared by two different sol–gel processes. We investigated the evolution with temperature of XRD patterns and of the magnetisation of powders issued from sol–gel solution decomposition. We prepared layers on silica glass by the spin- or dip-coating processes. XRD patterns on layers were also obtained. The dependency of the Faraday effect

J.-L Rehspringer; J. Bursik; D. Niznansky; A. Klarikova

2000-01-01

192

Giant Dipole Resonance decay of hot rotating 88Mo  

NASA Astrophysics Data System (ADS)

An experiment focusing on study of the properties of hot rotating compound nucleus of 88Mo was performed in LNL Legnaro using 48Ti beam at energies of 300 and 600 MeV on 40Ca target. The compound nucleus was produced at the temperatures of 3 and 4.5 MeV, with angular momentum distribution with lmax > 60 ? (i.e. exceeding the crtical angular momentum for fission). High-energy gamma rays, measured in coincidence with evaporation residues and alpha particles, were analyzed with the statistical model. The GDR parameters were obtained from the best fit to the data, which allowed investigating an evolution of the GDR width up to high temperatures.

Ciema?a, M.; Kmiecik, M.; Maj, A.; Kravchuk, V. L.; Gramegna, F.; Barlini, S.; Casini, G.; Camera, F.

2014-03-01

193

Nuclear Data Sheets for A = 88  

NASA Astrophysics Data System (ADS)

The experimental results from the various reaction and radioactive decay studies leading to nuclides in the A=88 mass chain have been reviewed. Nuclides ranging from Ge (Z=32) to Ru (Z=44) are included. For these nuclei, level and decay schemes, as well as tables of nuclear properties, are given. This work supersedes the previous evaluation of the data on these nuclides (G. Mukherjee, A.A. Sonzogni - Nucl.Data Sheets 105, 419 (2005)).

McCutchan, E. A.; Sonzogni, A. A.

2014-01-01

194

STS-88 Mission Commander Robert Cabana arrives at KSC for TCDT  

NASA Technical Reports Server (NTRS)

STS-88 Mission Commander Robert D. Cabana arrives after dark at the Shuttle Landing Facility in a T-38 jet aircraft to take part in Terminal Countdown Demonstration Test (TCDT) activities. The TCDT provides the crew with simulated countdown exercises, emergency egress training, and opportunities to inspect their mission payloads in the orbiter's payload bay. Mission STS-88 is targeted for launch on Dec. 3, 1998. It is the first U.S. flight for the assembly of the International Space Station and will carry the Unity connecting module. Others in the STS-88 crew are Pilot Frederick W. 'Rick' Sturckow, Mission Specialists Nancy J. Currie, Jerry L. Ross, James H. Newman and Russian cosmonaut Sergei Konstantinovich Krikalev. Ross and Newman will make three spacewalks to connect power, data and utility lines and install exterior equipment.

1998-01-01

195

21 CFR 520.88c - Amoxicillin trihydrate oral suspension.  

Code of Federal Regulations, 2010 CFR

...false Amoxicillin trihydrate oral suspension. 520.88c Section...ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED...FEEDS, AND RELATED PRODUCTS ORAL DOSAGE FORM NEW ANIMAL DRUGS...88c Amoxicillin trihydrate oral suspension. (a)...

2010-04-01

196

21 CFR 520.88 - Amoxicillin oral dosage forms.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Amoxicillin oral dosage forms. 520.88 ...ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED...FEEDS, AND RELATED PRODUCTS ORAL DOSAGE FORM NEW ANIMAL DRUGS § 520.88 Amoxicillin oral dosage...

2010-04-01

197

49 CFR 1.88 - The Federal Railroad Administration.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false The Federal Railroad Administration. 1.88 Section 1...Administrations § 1.88 The Federal Railroad Administration. Is responsible for...Regulating safety functions pertaining to railroads; (b) Conducting research and...

2012-10-01

198

49 CFR 1.88 - The Federal Railroad Administration.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 false The Federal Railroad Administration. 1.88 Section 1...Administrations § 1.88 The Federal Railroad Administration. Is responsible for...Regulating safety functions pertaining to railroads; (b) Conducting research and...

2013-10-01

199

7 CFR 1212.88 - OMB control number.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 false OMB control number. 1212.88 Section...RESEARCH, PROMOTION, CONSUMER EDUCATION AND INDUSTRY INFORMATION ORDER...Research, Promotion, Consumer Education, and Industry Information...Miscellaneous § 1212.88 OMB control number. The...

2010-01-01

200

TLR4 induces tumor growth and inhibits paclitaxel activity in MyD88-positive human ovarian carcinoma in vitro  

PubMed Central

In ovarian cancer patients, chemotherapy resistance is the principal factor restricting long-term treatment. Paclitaxel (Pac) has been previously reported to be a ligand to Toll-like receptor 4 (TLR4). It was determined that TLR4 signaling is divided into the following two pathways: Myeloid differentiation factor 88 (MyD88)-dependent and MyD88-independent. The present study investigated the effect of TLR4 ligation by Pac in MyD88-positive (MyD88+) and MyD88-negative (MyD88?) human ovarian cancer cell lines. An RNA interference expression vector was specifically constructed to target TLR4 mRNA, which was stably transfected into the human ovarian cancer cell lines (SKOV3, OVCAR3, A2780 and 3AO). Cytokines, including interleukin (IL)-6 and IL-8, were detected. Cell proliferation and apoptosis were assessed in the cells transfected with scramble control and TLR4 shRNA to explore the possible functions of TLR4 in ovarian cancer cell growth. It was found that lipopolysaccharide and Pac significantly increase the secretion of IL-6 and IL-8 in the SKOV3 cell line. Similarly, Pac resulted in a significant upregulation of IL-6 and IL-8 in OVCAR3 cells, but not in A2780 and 3AO cells. These results suggested that in MyD88+ ovarian cancer cell lines, TLR4 depletion shows increased sensitivity to Pac treatment in inhibiting cell proliferation compared with in cells without TLR4 knockdown. On the contrary, such changes were not found in MyD88? cells (A2780 and 3AO). TLR4 negatively regulates Pac chemotherapy, particularly in terms of cell proliferation, and TLR4 may be a novel treatment target in Pac-resistant ovarian cancer. PMID:24527095

WANG, AN-CONG; MA, YUE-BING; WU, FENG-XIA; MA, ZHI-FANG; LIU, NAI-FU; GAO, RONG; GAO, YONG-SHENG; SHENG, XIU-GUI

2014-01-01

201

33 CFR 88.15 - Lights on dredge pipelines.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Lights on dredge pipelines. 88.15 Section 88.15 Navigation and...V: PILOT RULES § 88.15 Lights on dredge pipelines. Dredge pipelines that are floating or supported on trestles...

2011-07-01

202

33 CFR 88.15 - Lights on dredge pipelines.  

Code of Federal Regulations, 2014 CFR

...2014-07-01 2014-07-01 false Lights on dredge pipelines. 88.15 Section 88.15 Navigation and...V: PILOT RULES § 88.15 Lights on dredge pipelines. Dredge pipelines that are floating or supported on trestles...

2014-07-01

203

33 CFR 88.15 - Lights on dredge pipelines.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Lights on dredge pipelines. 88.15 Section 88.15 Navigation and...V: PILOT RULES § 88.15 Lights on dredge pipelines. Dredge pipelines that are floating or supported on trestles...

2013-07-01

204

33 CFR 88.15 - Lights on dredge pipelines.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Lights on dredge pipelines. 88.15 Section 88.15 Navigation and...V: PILOT RULES § 88.15 Lights on dredge pipelines. Dredge pipelines that are floating or supported on trestles...

2012-07-01

205

42 CFR 84.88 - Breathing bag test.  

Code of Federal Regulations, 2014 CFR

...2014-10-01 2014-10-01 false Breathing bag test. 84.88 Section 84.88 Public Health...Self-Contained Breathing Apparatus § 84.88 Breathing bag test. (a) Breathing bags will be tested in an air atmosphere...

2014-10-01

206

42 CFR 84.88 - Breathing bag test.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Breathing bag test. 84.88 Section 84.88 Public Health...Self-Contained Breathing Apparatus § 84.88 Breathing bag test. (a) Breathing bags will be tested in an air atmosphere...

2011-10-01

207

42 CFR 84.88 - Breathing bag test.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Breathing bag test. 84.88 Section 84.88 Public Health...Self-Contained Breathing Apparatus § 84.88 Breathing bag test. (a) Breathing bags will be tested in an air atmosphere...

2012-10-01

208

42 CFR 84.88 - Breathing bag test.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Breathing bag test. 84.88 Section 84.88 Public Health...Self-Contained Breathing Apparatus § 84.88 Breathing bag test. (a) Breathing bags will be tested in an air atmosphere...

2010-10-01

209

42 CFR 84.88 - Breathing bag test.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Breathing bag test. 84.88 Section 84.88 Public Health...Self-Contained Breathing Apparatus § 84.88 Breathing bag test. (a) Breathing bags will be tested in an air atmosphere...

2013-10-01

210

36 CFR 7.88 - Indiana Dunes National Lakeshore.  

Code of Federal Regulations, 2011 CFR

...Property 1 2011-07-01 2011-07-01 false Indiana Dunes National Lakeshore. 7.88 Section 7.88 Parks, Forests...REGULATIONS, AREAS OF THE NATIONAL PARK SYSTEM § 7.88 Indiana Dunes National Lakeshore. (a) Fishing. Unless...

2011-07-01

211

36 CFR 7.88 - Indiana Dunes National Lakeshore.  

Code of Federal Regulations, 2012 CFR

...Property 1 2012-07-01 2012-07-01 false Indiana Dunes National Lakeshore. 7.88 Section 7.88 Parks, Forests...REGULATIONS, AREAS OF THE NATIONAL PARK SYSTEM § 7.88 Indiana Dunes National Lakeshore. (a) Fishing. Unless...

2012-07-01

212

36 CFR 7.88 - Indiana Dunes National Lakeshore.  

Code of Federal Regulations, 2014 CFR

...Property 1 2014-07-01 2014-07-01 false Indiana Dunes National Lakeshore. 7.88 Section 7.88 Parks, Forests...REGULATIONS, AREAS OF THE NATIONAL PARK SYSTEM § 7.88 Indiana Dunes National Lakeshore. (a) Fishing. Unless...

2014-07-01

213

36 CFR 7.88 - Indiana Dunes National Lakeshore.  

Code of Federal Regulations, 2010 CFR

...Property 1 2010-07-01 2010-07-01 false Indiana Dunes National Lakeshore. 7.88 Section 7.88 Parks, Forests...REGULATIONS, AREAS OF THE NATIONAL PARK SYSTEM § 7.88 Indiana Dunes National Lakeshore. (a) Fishing. Unless...

2010-07-01

214

36 CFR 7.88 - Indiana Dunes National Lakeshore.  

Code of Federal Regulations, 2013 CFR

...Property 1 2013-07-01 2013-07-01 false Indiana Dunes National Lakeshore. 7.88 Section 7.88 Parks, Forests...REGULATIONS, AREAS OF THE NATIONAL PARK SYSTEM § 7.88 Indiana Dunes National Lakeshore. (a) Fishing. Unless...

2013-07-01

215

Bacterial Infections in Myd88-Deficient Mice  

PubMed Central

Three breeding colonies of Myd88?/? mice had a history of significant morbidity and mortality. Although strain-specific poor reproductive performance might explain neonatal death and dystocia, mice were found dead or required euthanasia because of moribundity, distended abdomen, head tilt, and seizures. Histopathology results included bacteremia, placentitis, metritis, peritonitis with abscess formation, and suppurative meningoencephalitis. Intralesional gram-negative coccobacilli were present, often in extremely high number. Cultures of samples of the cardiac blood of a mouse and from water-bottle sipper tubes provided to some affected mice grew Pseudomonas aeruginosa. In addition, affected tissues from 2 mice and feces from a third tested PCR-positive for P. aeruginosa. Although the mice had received autoclaved reverse-osmosis–purified drinking water, we suspect that the mice were inoculated with P. aeruginosa through contaminated sipper tubes. Because of the deficiency in most of the Toll-like receptor signaling pathways, these Myd88?/? mice were unlikely to have developed competitive innate and adaptive immune responses, resulting in bacterial infections. These clinical cases underscore the importance of understanding how genotype, phenotype and environment affect animal health. Sound husbandry and experimental practices are needed to prevent the exposure of immunodeficient mice to pathogens. PMID:24674585

Villano, Jason S; Rong, Fang; Cooper, Timothy K

2014-01-01

216

http://www.sjsu.edu/senate/f88-10.htm F88-10 ACADEMIC DISHONESTY; CHEATING, PLAGIARISM,  

E-print Network

http://www.sjsu.edu/senate/f88-10.htm F88-10 ACADEMIC DISHONESTY; CHEATING, PLAGIARISM, SANCTIONS.0 DEFINITIONS OF ACADEMIC DISHONESTY: 1.1 CHEATING: http://www.sjsu.edu/senate/f88-10.htm (1 of 5) [8/6/2007 3:00:09 PM] #12;http://www.sjsu.edu/senate/f88-10.htm At SJSU, cheating is the act of obtaining or attempting

Gleixner, Stacy

217

(Data in metric tons of yttrium oxide (Y O ) content, unless otherwise noted)2 3 Domestic Production and Use: The rare-earth element, yttrium, was mined by one company as a constituent of the  

E-print Network

.20.0000 Free Free. Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed 2805 Domestic Production and Use: The rare-earth element, yttrium, was mined by one company as a constituent of the mineral bastnasite, but was not recovered as a separate element during processing. Bastnasite, a rare-earth

218

(Data in metric tons of yttrium oxide (Y2O3) content, unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2003.  

E-print Network

Relations 12/31/03 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium Production and Use: The rare-earth element yttrium was not mined in the United States in 2003. Yttrium and compounds containing by weight >19% to rare-earth compounds, including

219

(Data in metric tons of yttrium oxide (Y2O3) content, unless noted) Domestic Production and Use: The rare-earth element, yttrium, was mined by one company as a constituent of the  

E-print Network

ores and concentrates (monazite) 2612.20.0000 Free Free. Rare-earth metals, scandium and yttrium Production and Use: The rare-earth element, yttrium, was mined by one company as a constituent of the mineral bastnasite, but was not recovered as a separate element during processing. Bastnasite, a rare-earth

220

(Data in metric tons of yttrium oxide (Y2O3) content, unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was mined as a constituent of the mineral bastnasite,  

E-print Network

and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium and yttrium, whether or not intermixed Production and Use: The rare-earth element yttrium was mined as a constituent of the mineral bastnasite, but was not recovered as a separate element during processing. Bastnasite, a rare-earth fluocarbonate mineral, was mined

221

(Data in metric tons of yttrium oxide (Y2O3) content, unless otherwise noted) Domestic Production and Use: The rare-earth element, yttrium, was mined as a constituent of the mineral  

E-print Network

.20.0000 Free. Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed 2805.30.0000 5 Production and Use: The rare-earth element, yttrium, was mined as a constituent of the mineral bastnasite, but was not recovered as a separate element during processing. Bastnasite, a rare-earth fluocarbonate mineral, was mined

222

(Data in metric tons of yttrium oxide (Y O ) content, unless otherwise noted)2 3 Domestic Production and Use: The rare-earth element, yttrium, was mined by one company as a constituent of the  

E-print Network

/31/96 Thorium ores and concentrates (monazite) 2612.20.0000 Free Free. Rare-earth metals, scandium and yttrium Domestic Production and Use: The rare-earth element, yttrium, was mined by one company as a constituent of the mineral bastnasite, but was not recovered as a separate element during processing. Bastnasite, a rare-earth

223

(Data in metric tons of yttrium oxide (Y O ) content, unless otherwise noted)2 3 Domestic Production and Use: The rare-earth element, yttrium, was mined as a constituent of the mineral bastnasite,  

E-print Network

/31/98 Thorium ores and concentrates (monazite) 2612.20.0000 Free Free. Rare-earth metals, scandium and yttrium Domestic Production and Use: The rare-earth element, yttrium, was mined as a constituent of the mineral bastnasite, but was not recovered as a separate element during processing. Bastnasite, a rare-earth

224

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2008. All  

E-print Network

12-31-08 Thorium ores and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium Production and Use: The rare-earth element yttrium was not mined in the United States in 2008. All yttrium and compounds containing by weight >19% to rare-earth compounds, including

225

Dynamics of transients in yttrium-iron-garnet.  

PubMed

Yttrium-iron-garnet (YIG) is an important technological material used in microwave devices. In this paper we use dual microwave (1-4 GHz) drives to study the dynamical bifurcation behavior of magnetostatic and spin-wave modes in YIG spheres and rectangular films. The samples are placed in a dc magnetic field and driven by cw and pulse-modulated microwave excitations at magnetostatic mode frequencies. A second microwave drive applied to the sample excites additional spin-wave modes that can interact with those arising from the original excitation and thereby affect the transmission characteristics at the primary frequency. We find a significant decrease in transmission of the primary when the secondary frequency is tuned to approximately half that of the primary drive. This decrease is observed both in the steady state behavior and in the initial overshoot transient associated with pulse modulation of the primary excitation. Results such as these are often treated by extending linear theory to include higher order interaction terms. Herein we present a simple dynamical model that reproduces results that qualitatively resemble the experimental data. (c) 1997 American Institute of Physics. PMID:12779704

Mar, D. J.; Pecora, L. M.; Rachford, F. J.; Carroll, T. L.

1997-12-01

226

Photodissociation of yttrium and lanthanum oxide cluster cations.  

PubMed

Transition metal oxide cations of the form M n O m (+) (M = Y, La) are produced by laser vaporization in a pulsed nozzle source and detected with time-of-flight mass spectrometry. Cluster oxides for each value of n form only a limited number of stoichiometries; MO(M2O3)x(+) species are particularly intense. Cluster cations are mass selected and photodissociated using the third harmonic (355 nm) of a Nd:YAG laser. Multiphoton excitation is required to dissociate these clusters because of their strong bonding. Yttrium and lanthanum oxides exhibit different dissociation channels, but some common trends can be identified. Larger clusters for both metals undergo fission to make certain stable cation clusters, especially MO(M2O3) x (+) species. Specific cations are identified to be especially stable because of their repeated production in the decomposition of larger clusters. These include M3O4(+), M5O7(+), M7O10(+), and M9O13(+), along with Y6O8(+). Density functional theory calculations were performed to investigate the relative stabilities and structures of these systems. PMID:18494453

Reed, Z D; Duncan, M A

2008-06-19

227

Magnetic Properties of Composite Hematite/Yttrium Oxide Colloidal Particles.  

PubMed

The effect of the shell thickness and density on the magnetic properties of composite colloidal particles consisting of a hematite (alpha-Fe(2)O(3)) core and an yttrium oxide (Y(2)O(3)) layer is described. Pure iron oxide colloidal spheres show two clearly different trends of variation of their magnetic susceptibility, chi(m), with temperature. Below T(M) approximately 220 K, chi(m) shows a slight increase when the particles are heated; a sharp transition is observed at such a critical temperature, whereby chi(m) increases almost 3 times in a very narrow temperature interval, decreasing slowly afterward. This is the result of a well-known transition from perfect to imperfect antiferromagnetism (canted antiferromagnetism). Three types of core/shell particles have been prepared, and a gradual change is observed in chi(m) from that of hematite to that of pure Y(2)O(3). Even the most efficiently covered particles still show a change in their chi(m)-T trends around T(M), and are clearly distinct from Y(2)O(3) particles. Magnetization curves show that coating of hematite particles induces significant changes in the coercivity of the samples. The latter is always larger for composite than for core particles. Copyright 2001 Academic Press. PMID:11446785

Plaza, R. C.; Gómez-Lopera, S. A.; Delgado, A. V.

2001-08-01

228

Structural and electrical properties of zirconium doped yttrium oxide nanostructures  

NASA Astrophysics Data System (ADS)

A synthetic process for the formation of ZrxY1-xOy nanostructures is demonstrated by the reaction of yttrium nitrate hexahydrate with zirconium propoxide. The reactions are carried out at temperature 60°C and pressure 0.1 MPa. The energy dispersive X-ray (EDX) spectroscopy measurements confirm formation of ZrxY1-xOy nanostructures and the presence of carbonate and hydroxide species which are removed after high temperature anneals. It was found that the oxygen pressure during synthesis plays a determinant role on the structural properties of the nanostructure. This effect is further studied by atomic force microscopy (AFM) measurements and scanning electron microscope (SEM), which showed the formation of an isotopically organized structure. X-ray diffraction (XRD) measurement reveals that these changes in the nanostructural efficiency are associated with structural and compositional changes among the substrate. The dielectric constant as measured by the capacitance-voltage (C-V) technique is estimated to be around 39.05. C-V measurements taken at 1 MHz show the maximum capacitance for the Zr0.05Y0.95Oy film. The leakage current densities were below 10-5 A/cm2 for the Zr0.05Y0.95Oy film.

Bahari, Ali; Ebrahimzadeh, Masoud; Gholipur, Reza

2014-04-01

229

Structural and optical characterization of samarium doped yttrium oxide nanoparticles.  

PubMed

Here we demonstrate the preparation of samarium doped yttrium oxide nanoparticles using samarium chloride as a samarium source by co-precipitation method. The samarium doped yttria nanoparticles are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), and Fourier transform infra-red spectroscopy (FT-IR). The XRD results revealed that all the synthesized samples exhibit cubic phase with average grain size of the nanoparticles in the order of 9-20 nm, calculated by Scherer's formula. The strain present in the annealed sample is estimated from Williamson-Hall (W-H) plot which is in the order of 3 x 10(-3). SEM and HRTEM results showed that the samples are composed of aggregated nanoparticles with uniform shape and size. The particles are highly crystalline which is also confirmed by XRD results. The position of the absorption peak is shifted towards the lower wavelength side when particles sizes reduced around 10 nm is observed by UV-visible (UV-vis) spectrometer. The direct band gap is estimated from UV-vis absorption spectrum, the calculated value is 5.98 and 5.87 eV for as-prepared and annealed sample (800 degrees C) respectively. The high intense red emission band observed at 608 nm from 4G(5/2)-6H(7/2) transition for Y2O3:Sm3+ under excitation at 214 nm using fluorescence spectrometer. PMID:19908594

Srinivasan, Ramasamy; Yogamalar, Rajeswari; Vinu, Ajayan; Ariga, Katsuhiko; Bose, Arumugam Chandra

2009-11-01

230

Structure and thermal properties of yttrium alumino-phosphate glasses  

NASA Astrophysics Data System (ADS)

The structure and thermal properties of yttrium alumino-phosphate glasses, of nominal composition (Y2O3)0.31-z(Al2O3)z(P2O5)0.69 with 0 \\lesssim z \\lesssim 0.31 , were studied by using a combination of neutron diffraction, 27Al and 31P magic angle spinning nuclear magnetic resonance, differential scanning calorimetry and thermal gravimetric analysis methods. The Vickers hardness of the glasses was also measured. The data are compared to those obtained for pseudo-binary Al2O3-P2O5 glasses and the structure of all these materials is rationalized in terms of a generic model for vitreous phosphate materials in which Y3+ and Al3+ act as modifying cations that bind only to the terminal (non-bridging) oxygen atoms of PO4 tetrahedra. The results are used to help elucidate the phenomenon of rare-earth clustering in phosphate glasses which can be reduced by substituting Al3+ ions for rare-earth R3+ ions at fixed modifier content.

Martin, Richard A.; Salmon, Philip S.; Carroll, Donna L.; Smith, Mark E.; Hannon, Alex C.

2008-03-01

231

[Biokinetics of tumor-affinity yttrium preparations--Part 1].  

PubMed

Differences of yttrium biokinetics after application to male tumor-bearing mice of 87Y-citrate were studied in comparison to a 87Y-NTA-EDTMP-Ca mixture after variation of both the manner of application (intraperitoneal vs. intratumoral) and the tumor type (mamma carcinoma vs. melanoma). The application of 87Y as NTA-EDTMP-Ca preparation led--in comparison to the citrate form applied so far--to a similar radionuclide tumor accumulation and distinctly lower extratumoral radioactivities in liver, spleen and skeleton with clearly more favorable tumor/background ratios. Melanomas showed a significantly higher radioactivity accumulation (factor 2-3) after injection of 87Y-NTA-EDTMP-Ca than mamma carcinomas. Intratumoral application led to high initial radioactivities in the tumors. Radioactivity concentrations which are comparable with those after intraperitoneal application were achieved within 4 h after intratumoral application. The application of the EDTMP-containing mixture promises in comparison to the traditional citrate form higher radiation doses in the tumor related to the whole-body radiation exposure. The consequences for a possible tumor therapy will be further investigated. PMID:7724362

Schomäker, K; Hientzsch, B; Franke, W G; Scheidhauer, K; Scharl, A; Jantsch, K; Shukla, S K; Limouris, G; Schicha, H

1995-02-01

232

Low-voltage cathodeluminescence of europium-activated yttrium orthovanadate  

NASA Astrophysics Data System (ADS)

Emissive flat panel display systems operating in full color demand higher performance at low voltages (ca. 50 - 1000 V) from cathodoluminescent (CL) phosphors than cathode ray tubes require. Hydrothermal synthesis has been suggested as a route to phosphors with improved efficiencies, lower voltage thresholds, and increased saturation power. This hypothesis was tested in europium-doped yttrium orthovanadate (YVO4:Eu), an efficient, red emitting CL phosphor. The CL efficiency of YVO4:Eu crystallized from aqueous solution at 200 degree(s)C is relatively low until it is annealed. The distribution of particle sizes in the low- temperature phosphor is similar to that in material made via a solid-state route, but crystallites remain much smaller (ca. 400 angstrom) until they are annealed. These observations, along with the anomalously strong dependence of CL intensity on europium concentration, support a model in which efficiency principally depends on crystallite size. CL efficiency of both solid state and hydrothermal YVO4:Eu increases with voltage at constant power. Surface-bound electrons are likely the dominant influence on efficiency at voltages near threshold. Saturation power is independent of synthetic route. It is apparent that the CL properties of hydrothermally synthesized YVO4:Eu are essentially the same as those of YVO4:Eu produced via conventional, high-temperature routes.

Phillips, Mark L. F.

1995-04-01

233

Phase diagram for magnon condensate in Yttrium Iron Garnet film.  

PubMed

Recently, magnons, which are quasiparticles describing the collective motion of spins, were found to undergo Bose-Einstein condensation (BEC) at room temperature in films of Yttrium Iron Garnet (YIG). Unlike other quasiparticle BEC systems, this system has a spectrum with two degenerate minima, which makes it possible for the system to have two condensates in momentum space. Recent Brillouin Light Scattering studies for a microwave-pumped YIG film of thickness d = 5??m and field H = 1?kOe find a low-contrast interference pattern at the characteristic wavevector Q of the magnon energy minimum. In this report, we show that this modulation pattern can be quantitatively explained as due to unequal but coherent Bose-Einstein condensation of magnons into the two energy minima. Our theory predicts a transition from a high-contrast symmetric state to a low-contrast non-symmetric state on varying the d and H, and a new type of collective oscillation. PMID:23455849

Li, Fuxiang; Saslow, Wayne M; Pokrovsky, Valery L

2013-01-01

234

Phase Diagram for Magnon Condensate in Yttrium Iron Garnet Film  

PubMed Central

Recently, magnons, which are quasiparticles describing the collective motion of spins, were found to undergo Bose-Einstein condensation (BEC) at room temperature in films of Yttrium Iron Garnet (YIG). Unlike other quasiparticle BEC systems, this system has a spectrum with two degenerate minima, which makes it possible for the system to have two condensates in momentum space. Recent Brillouin Light Scattering studies for a microwave-pumped YIG film of thickness d = 5??m and field H = 1?kOe find a low-contrast interference pattern at the characteristic wavevector Q of the magnon energy minimum. In this report, we show that this modulation pattern can be quantitatively explained as due to unequal but coherent Bose-Einstein condensation of magnons into the two energy minima. Our theory predicts a transition from a high-contrast symmetric state to a low-contrast non-symmetric state on varying the d and H, and a new type of collective oscillation. PMID:23455849

Li, Fuxiang; Saslow, Wayne M.; Pokrovsky, Valery L.

2013-01-01

235

Method of forming a relatively stable slip of silicon metal particles and yttrium containing particles  

DOEpatents

The method concerns forming a relatively stable slip of silicon metal particles and yttrium containing particles. In one embodiment, a casting slip of silicon metal particles is formed in water. Particles of a yttrium containing sintering aid are added to the casting slip. The yttrium containing sintering aid is a compound which has at least some solubility in water to form Y.sup.+3 ions which have a high potential for totally flocculating the silicon metal particles into a semiporous solid. A small amount of a fluoride salt is added to the casting slip which contains the yttrium containing sintering aid. The fluoride salt is one which will produce fluoride anions when dissolved in water. The small amount of the fluoride anions produced are effective to suppress the flocculation of the silicon metal particles by the Y.sup.+3 ions so that all particles remain in suspension in the casting slip and the casting slip has both an increased shelf life and can be used to cast articles having a relatively thick cross-section. The pH of the casting slip is maintained in a range from 7.5 to 9. Preferably, the fluoride salt used is one which is based on a monovalent cation such as sodium or ammonia. The steps of adding the yttrium containing sintering aid and the fluoride salt may be interchanged if desired, and the salt may be added to a solution containing the sintering aid prior to addition of the silicon metal particles.

Dickie, Ray A. (Birmingham, MI); Mangels, John A. (Flat Rock, MI)

1984-01-01

236

Dopant effect of yttrium and the growth and adherence of alumina on nickel-aluminum alloys  

NASA Technical Reports Server (NTRS)

The atom superposition and electron delocalization molecular orbital theory and large cluster models have been employed to study cation vacancy diffusion in alpha-Al2O3 and the bonding of alpha-Al2O3 to nickel, aluminum, and yttrium surfaces. Al(3+) diffusion barriers in alpha-Al2O3 by the vacancy mechanism are in reasonable agreement with experiment. The barrier to Y(3+) diffusion is predicted to be much higher. Since addition of yttrium to transition metal alloys is known to reduce the growth rate and stress convolutions in protective alumina scales, this result suggests the rate-limiting step in scale growth is cation vacancy diffusion. This may partially explain the beneficial effect of yttrium dopants on scale adhesion. The theory also predicts a very strong bonding between alumina and yttrium at the surface of the alloy. This may also be important to the adhesion phenomenon. It is also found that aluminum and yttrium atoms bond very strongly to nickel because of charge transfer from their higher lying valence orbitals to the lower lying nickel s-d band.

Anderson, A. B.; Mehandru, S. P.; Smialek, J. L.

1985-01-01

237

Treatment of unresectable intrahepatic cholangiocarcinoma with yttrium-90 radioembolization: A systematic review and pooled analysis  

PubMed Central

Radioembolization with yttrium-90 microspheres offers an alternative treatment option for patients with unresectable intrahepatic cholangiocarcinoma (ICC). However, the rarity and heterogeneity of ICC makes it difficult to draw firm conclusions about treatment efficacy. Therefore, the goal of the current study is to systematically review the existing literature surrounding treatment of unresectable ICCs with yttrium-90 microspheres and provide a comprehensive review of the current experience and clinical outcome of this treatment modality. We performed a comprehensive search of electronic databases for ICC treatment and identified 12 studies with relevant data regarding radioembolization therapy with yttrium-90 microspheres. Based on pooled analysis, the overall weighted median survival was 15.5 months. Tumour response based on radiological studies demonstrated a partial response in 28% and stable disease in 54% of patients at three months. Seven patients were able to be downstaged to surgical resection. The complication profile of radioembolization is similar to that of other intra-arterial treatment modalities. Overall survival of patients with ICC after treatment with yttrium-90 microspheres is higher than historical survival rates and shows similar survival to those patients treated with systemic chemotherapy and/or trans-arterial chemoembolization therapy. Therefore, the use of yttrium-90 microspheres should be considered in the list of available treatment options for ICC. However, future randomized trials comparing systemic chemotherapy, TACE and local radiation will be required to identify the optimal treatment modality for unresectable ICC. PMID:25449754

Al-Adra, D.P.; Gill, R.S.; Axford, S.J.; Shi, X.; Kneteman, N.; Liau, S.-S.

2015-01-01

238

Enhanced spin pumping at yttrium iron garnet/Au interfaces C. Burrowes, B. Heinrich, B. Kardasz, E. A. Montoya, E. Girt et al.  

E-print Network

Enhanced spin pumping at yttrium iron garnet/Au interfaces C. Burrowes, B. Heinrich, B. Kardasz, E://apl.aip.org/about/rights_and_permissions #12;Enhanced spin pumping at yttrium iron garnet/Au interfaces C. Burrowes,1 B. Heinrich,1,a) B yttrium iron garnet (YIG)/normal metal Au interface was studied using ferromagnetic resonance. The spin

239

Atomic-scale imaging and the effect of yttrium on the fracture toughness of silicon carbide ceramics  

E-print Network

Atomic-scale imaging and the effect of yttrium on the fracture toughness of silicon carbide; Silicon carbide; Yttrium dopants; Fracture toughness 1. Introduction Rare-earth (RE) additives are commonly used as sintering aids in the processing of silicon carbide and silicon nitride structural

Ritchie, Robert

240

Local order and magnetic behavior of amorphous and nanocrystalline yttrium iron garnet produced by swift heavy ion irradiations  

E-print Network

Local order and magnetic behavior of amorphous and nanocrystalline yttrium iron garnet produced-doped and undoped yttrium iron garnet Y3Fe5O12 or YIG on nonmagnetic Gd3Ga5O12 substrates were irradiated with swift of the fivefold-coordinated pyramidal sites and/or ii a probable decomposition of the garnet into orthoferrite

Paris-Sud XI, Université de

241

W88 integrated circuit shelf life program  

SciTech Connect

The W88 Integrated Circuit Shelf Life Program was created to monitor the long term performance, reliability characteristics, and technological status of representative WR ICs manufactured by the Allied Signal Albuquerque Microelectronics Operation (AMO) and by Harris Semiconductor Custom Integrated Circuits Division. Six types of ICs were used. A total of 272 ICs entered two storage temperature environments. Electrical testing and destructive physical analysis were completed in 1995. During each year of the program, the ICs were electrically tested and samples were selected for destructive physical analysis (DPA). ICs that failed electrical tests or DPA criteria were analyzed. Fifteen electrical failures occurred, with two dominant failure modes: electrical overstress (EOS) damage involving the production test programs and electrostatic discharge (ESD) damage during analysis. Because of the extensive handling required during multi-year programs like this, it is not unusual for EOS and ESD failures to occur even though handling and testing precautions are taken. The clustering of the electrical test failures in a small subset of the test operations supports the conclusion that the test operation itself was responsible for many of the failures and is suspected to be responsible for the others. Analysis of the electrical data for the good ICs found no significant degradation trends caused by the storage environments. Forty-six ICs were selected for DPA with findings primarily in two areas: wire bonding and die processing. The wire bonding and die processing findings are not surprising since these technology conditions had been documented during manufacturing and were determined to present acceptable risk. The current reliability assessment of the W88 stockpile assemblies employing these and related ICs is reinforced by the results of this shelf life program. Data from this program will aid future investigation of 4/3 micron or MNOS IC technology failure modes.

Soden, J.M.; Anderson, R.E.

1998-01-01

242

Increased N-glycosylation of Asn88 in serum pancreatic ribonuclease 1 is a novel diagnostic marker for pancreatic cancer  

PubMed Central

Alterations of carbohydrate structures in cancer cells are the most promising targets for developing clinical diagnostic reagents. Pancreatic cancer is one of the most difficult cancers to diagnose because it lacks definitive symptoms. Two antibodies were raised against human pancreatic ribonuclease 1 that bind to the enzyme containing unglycosylated Asn88, but not when its Asn88 is N-glycosylated. Differential studies using these antibodies in immunoassays and Western blot analyses showed a significant increase in the serum levels of pancreatic ribonuclease 1 containing N-glycosylated Asn88 in pancreatic cancer patients compared with normal human subjects. Focusing on the increase in an N-glycosylated Asn residue of serum pancreatic ribonuclease 1, specifically Asn88, affords a new diagnostic marker for pancreatic cancer. This is the first report of a diagnostic cancer marker that takes advantage of the presence or absence of N-glycosylation at a specific Asn residue of a glycoprotein. PMID:25336120

Nakata, Daisuke

2014-01-01

243

Lack of GPR88 enhances medium spiny neuron activity and alters motor- and cue-dependent behaviors  

PubMed Central

The striatum regulates motor control, reward, and learning. Abnormal function of striatal GABAergic medium spiny neurons (MSNs) is believed to contribute to the deficits in these processes that are observed in many neuropsychiatric diseases. The orphan G-protein-coupled receptor (GPCR) GPR88 is robustly expressed in MSNs and regulated by neuropharmacological drugs, but its contribution to MSN physiology and behavior is unclear. Here we show that in the absence of GPR88, MSNs have increased glutamatergic excitation and reduced GABAergic inhibition that together promote enhanced firing rates in vivo, resulting in hyperactivity, poor motor-coordination, and impaired cue-based learning in mice. Targeted viral expression of GPR88 in MSNs rescues the molecular and electrophysiological properties and normalizes behavior, suggesting that aberrant MSN activation in the absence of GPR88 underlies behavioral deficits and its dysfunction may contribute to behaviors observed in neuropsychiatric disease. PMID:23064379

Quintana, Albert; Sanz, Elisenda; Wang, Wengang; Storey, Granville P.; Güler, Ali D.; Wanat, Matthew J.; Roller, Bryan A.; La Torre, Anna; Amieux, Paul S.; McKnight, G. Stanley; Bamford, Nigel S.; Palmiter, Richard D.

2012-01-01

244

Lack of GPR88 enhances medium spiny neuron activity and alters motor- and cue-dependent behaviors.  

PubMed

The striatum regulates motor control, reward and learning. Abnormal function of striatal GABAergic medium spiny neurons (MSNs) is believed to contribute to the deficits in these processes that are observed in many neuropsychiatric diseases. The orphan G protein-coupled receptor GPR88 is robustly expressed in MSNs and is regulated by neuropharmacological drugs, but its contribution to MSN physiology and behavior is unclear. We found that, in the absence of GPR88, MSNs showed increased glutamatergic excitation and reduced GABAergic inhibition, which promoted enhanced firing rates in vivo, resulting in hyperactivity, poor motor coordination and impaired cue-based learning in mice. Targeted viral expression of GPR88 in MSNs rescued the molecular and electrophysiological properties and normalized behavior, suggesting that aberrant MSN activation in the absence of GPR88 underlies behavioral deficits and its dysfunction may contribute to behaviors observed in neuropsychiatric disease. PMID:23064379

Quintana, Albert; Sanz, Elisenda; Wang, Wengang; Storey, Granville P; Güler, Ali D; Wanat, Matthew J; Roller, Bryan A; La Torre, Anna; Amieux, Paul S; McKnight, G Stanley; Bamford, Nigel S; Palmiter, Richard D

2012-11-01

245

Intestinal epithelial MyD88 is a sensor switching host metabolism towards obesity according to nutritional status.  

PubMed

Obesity is associated with a cluster of metabolic disorders, low-grade inflammation and altered gut microbiota. Whether host metabolism is controlled by intestinal innate immune system and the gut microbiota is unknown. Here we report that inducible intestinal epithelial cell-specific deletion of MyD88 partially protects against diet-induced obesity, diabetes and inflammation. This is associated with increased energy expenditure, an improved glucose homeostasis, reduced hepatic steatosis, fat mass and inflammation. Protection is transferred following gut microbiota transplantation to germ-free recipients. We also demonstrate that intestinal epithelial MyD88 deletion increases anti-inflammatory endocannabinoids, restores antimicrobial peptides production and increases intestinal regulatory T cells during diet-induced obesity. Targeting MyD88 after the onset of obesity reduces fat mass and inflammation. Our work thus identifies intestinal epithelial MyD88 as a sensor changing host metabolism according to the nutritional status and we show that targeting intestinal epithelial MyD88 constitutes a putative therapeutic target for obesity and related disorders. PMID:25476696

Everard, Amandine; Geurts, Lucie; Caesar, Robert; Van Hul, Matthias; Matamoros, Sébastien; Duparc, Thibaut; Denis, Raphael G P; Cochez, Perrine; Pierard, Florian; Castel, Julien; Bindels, Laure B; Plovier, Hubert; Robine, Sylvie; Muccioli, Giulio G; Renauld, Jean-Christophe; Dumoutier, Laure; Delzenne, Nathalie M; Luquet, Serge; Bäckhed, Fredrik; Cani, Patrice D

2014-01-01

246

Intestinal epithelial MyD88 is a sensor switching host metabolism towards obesity according to nutritional status  

PubMed Central

Obesity is associated with a cluster of metabolic disorders, low-grade inflammation and altered gut microbiota. Whether host metabolism is controlled by intestinal innate immune system and the gut microbiota is unknown. Here we report that inducible intestinal epithelial cell-specific deletion of MyD88 partially protects against diet-induced obesity, diabetes and inflammation. This is associated with increased energy expenditure, an improved glucose homeostasis, reduced hepatic steatosis, fat mass and inflammation. Protection is transferred following gut microbiota transplantation to germ-free recipients. We also demonstrate that intestinal epithelial MyD88 deletion increases anti-inflammatory endocannabinoids, restores antimicrobial peptides production and increases intestinal regulatory T cells during diet-induced obesity. Targeting MyD88 after the onset of obesity reduces fat mass and inflammation. Our work thus identifies intestinal epithelial MyD88 as a sensor changing host metabolism according to the nutritional status and we show that targeting intestinal epithelial MyD88 constitutes a putative therapeutic target for obesity and related disorders. PMID:25476696

Everard, Amandine; Geurts, Lucie; Caesar, Robert; Van Hul, Matthias; Matamoros, Sébastien; Duparc, Thibaut; Denis, Raphael G. P.; Cochez, Perrine; Pierard, Florian; Castel, Julien; Bindels, Laure B.; Plovier, Hubert; Robine, Sylvie; Muccioli, Giulio G.; Renauld, Jean-Christophe; Dumoutier, Laure; Delzenne, Nathalie M.; Luquet, Serge; Bäckhed, Fredrik; Cani, Patrice D.

2014-01-01

247

Yttrium segregation and surface phases of yttria-stabilized zirconia (1 1 1) surface  

NASA Astrophysics Data System (ADS)

Surface segregation of yttria-stabilized zirconia (YSZ) was studied via first-principles computations and thermodynamics. For the cubic YSZ (1 1 1) surface, yttrium can segregate only to a subsurface layer, and these segregation phases are terminated at the surface by defective oxygen layers with honeycomb structure. The segregation is independent of the bulk yttrium concentration at high oxygen partial pressures or low temperatures. At very low oxygen partial pressures and high temperatures there is no surface yttrium segregation and the surface is terminated by O-Zr. Our results provide a reasonable explanation for previous experimental work, and also a framework for extending our understanding of cation segregation in oxide surfaces.

Wang, Xiao-Gang

248

Production and quality control of radioactive yttrium microspheres for medical applications.  

PubMed

In this paper, a method for production of yttrium silicate microspheres is reported. Yttrium silicate microspheres with approximate sizes of 20-50µm were obtained when an aqueous solution of Y(NO3)3 was added to tetraethyl orthosilicate (TEOS) and was pumped into silicone oil under constant stirring. The shapes of the particles produced by the proposed method were regular and nearly spherical. The spherical shapes, composition and element distribution were investigated by scanning electron microscopy (SEM), carbon/sulfur analysis and SEM/EDS mapping analysis. Paper chromatography was used to identify radiochemical impurities in the radioactive microspheres. The radionuclide purity was determined using a gamma spectrometry system and an ultra-low-level liquid scintillation spectrometer. The results indicated that the proposed silicone oil spheroidization method is suitable for the production of yttrium silicate microspheres. PMID:24389532

Ghahramani, M R; Garibov, A A; Agayev, T N

2014-02-01

249

Synthesis, Structure, and Molecular Orbital Studies of Yttrium, Erbium, and Lutetium Complexes Bearing eta(2)-Pyrazolato Ligands: Development of a New Class of Precursors for Doping Semiconductors.  

PubMed

Treatment of yttrium metal with bis(pentafluorophenyl)mercury (1.5 equiv), 3,5-di-tert-butylpyrazole (3 equiv), and pyridine (2 equiv) in toluene at ambient temperature for 120 h afforded tris(3,5-di-tert-butylpyrazolato)bis(pyridine)yttrium(III) (33%). In an analogous procedure, the reaction of erbium metal with 3,5-dialkylpyrazole (alkyl = methyl or tert-butyl), bis(pentafluorophenyl)mercury, and a neutral nitrogen donor (4-tert-butylpyridine, pyridine, n-butylimidazole, or 3,5-di-tert-butylpyrazole) yielded tris(3,5-di-tert-butylpyrazolato)bis(4-tert-butylpyridine)erbium(III) (63%), tris(3,5-di-tert-butylpyrazolato)bis(pyridine)erbium(III) (88%), tris(3,5-di-tert-butylpyrazolato)bis(n-butylimidazole)erbium(III) (48%), tris(3,5-dimethylpyrazolato)bis(4-tert-butylpyridine)erbium(III) (50%), and tris(3,5-di-tert-butylpyrazolato)(3,5-di-tert-butylpyrazole)erbium(III) (59%), respectively. Treatment of tris(cyclopentadienyl)lutetium(III) or tris(cyclopentadienyl)erbium(III) with 3,5-di-tert-butylpyrazole (3 equiv) and 4-tert-butylpyridine (2 equiv) in toluene at ambient temperature for 24 h afforded tris(3,5-di-tert-butylpyrazolato)bis(4-tert-butylpyridine)lutetium(III) (83%) and tris(3,5-di-tert-butylpyrazolato)bis(4-tert-butylpyridine)erbium(III) (41%), respectively. The X-ray crystal structures of all new complexes were determined. The X-ray structure analyses revealed seven- and eight-coordinate lanthanide complexes with all-nitrogen coordination spheres and eta(2)-pyrazolato ligands. Molecular orbital calculations were carried out on dichloro(pyrazolato)diammineyttrium(III). The calculations demonstrate that eta(2)-bonding of the pyrazolato ligand is favored over the eta(1)-bonding mode and give insight into the bonding between yttrium and the pyrazolato ligands. Complexes bearing 3,5-di-tert-butylpyrazolato ligands can be obtained in a high state of purity and sublime without decomposition (150 degrees C, 0.1 mmHg). Application of these complexes as source compounds for chemical vapor deposition processes is discussed. PMID:11671168

Pfeiffer, Dirk; Ximba, Bhekumusa J.; Liable-Sands, Louise M.; Rheingold, Arnold L.; Heeg, Mary Jane; Coleman, David M.; Schlegel, H. Bernhard; Kuech, Thomas F.; Winter, Charles H.

1999-10-01

250

Recyclables recovery of europium and yttrium metals and some salts from spent fluorescent lamps.  

PubMed

Europium and yttrium metals and some valuable salts were recovered from the powder coating the inner surface of the glass tubes of fluorescent lamps. The tubes were broken under 30% aqueous acetone to avoid emission of mercury vapor to the atmosphere, and the powder was collected by brushing. Metals available in the powder were pressure leached using sulfuric/nitric acid mixture. Sulphate salt of europium and yttrium so obtained was converted to thiocyanate. Trimethyl-benzylammonium chloride solvent was used to selectively extract Eu and Y from the thiocyanate solution. The metal loaded in the organic solvent was recovered by N-tributylphosphate in 1M nitric acid to produce nitrate salts of Eu and Y. Europium nitrate was separated from yttrium nitrate by dissolving in ethyl alcohol. The isolated powder contained 1.62% europium oxide, 1.65% yttrium oxide, 34.48% calcium sulphate, 61.52% Ca orthophosphate and 0.65% other impurity metals by weight. Autoclave digestion of the powder in the acid mixture for 4h at approximately 125 degrees C and 5 MPa dissolved 96.4% of the yttrium and 92.8% of the europium. Conversion of the sulphate to thiocyanate is favoured at low temperature. Extraction of Eu and Y from the thiocyanate solution attained its maximum at approximately 80 degrees C. N-tributylphosphate in 1N nitric acid at 125 degrees C achieved a stripping extent of 99%. Thermal reduction using hydrogen gas at 850 degrees C and 1575 degrees C produced europium and yttrium metals, respectively. A metal separation factor of 9.4 was achieved. Economic estimation revealed that the suggested method seemed feasible for industrial applications. PMID:17566725

Rabah, Mahmoud A

2008-01-01

251

Hydrothermal synthesis, crystal structures and photoluminescence properties of mixed europium-yttrium organic frameworks  

NASA Astrophysics Data System (ADS)

Three mixed europium-yttrium organic frameworks: Eu2-xYx(Mel)(H2O)6 (Mel=mellitic acid or benzene-1,2,3,4,5,6-hexacarboxylic acid, x=0.38 1, 0.74 2, and 0.86 3) have been synthesized and characterized. All the compounds contain a 3-D net with (4, 8)-flu topology. The study indicates that the photoluminescence properties are effectively affected by the different ratios of europium and yttrium ions, the quantum efficiency is increased and the Eu3+ lifetime becomes longer in these MOFs than those of the Eu analog.

Han, Yinfeng; Fu, Lianshe; Mafra, Luís; Shi, Fa-Nian

2012-02-01

252

The nature of photoinduced changes in the magnetostriction of yttrium-iron garnet single crystals  

SciTech Connect

A model of the occurrence of photoinduced changes in linear magnetostriction is proposed based on a complex experimental study of magnetostrictive strains in yttrium-iron garnets Y{sub 3}Fe{sub 5}O{sub 12} with low contents of different impurities. Analytical expressions for calculating the magnetostriction in yttrium-iron garnet single crystals with different types of doping are presented. The correlation of the photoinduced change in the magnetostriction with the crystallographic features of the samples is demonstrated. The changes in the magnetostriction constants are analyzed quantitatively for samples prepared in different ways.

Vorob'eva, N. V., E-mail: vnv@anrb.ru [Russian Academy of Sciences, Institute of Molecular and Crystals Physics (Russian Federation)

2011-05-15

253

Synthesis, Characterization, and Optical Properties of Pristine and Doped Yttrium Aluminum Garnet Nanopowders  

SciTech Connect

Pristine, Si-doped, and Si/Nd-doped yttrium aluminum garnet (YAG) nanoparticles were synthesized by pyrolysis of complex compounds of aluminum and yttrium with triethanolamine. It was found that the coexistence of Si?? and Nd?? increased the solubility of both ions and promoted the formation of YAG phase. Single-phase, nanocrystalline Si/Nd:YAG powders were obtained at calcinations temperatures as low as 920 C. The optical behaviour of the Si/Nd:YAG nanopowders was similar to that of single-crystal ND:YAG.

Wang, Yiguang; Zhang, Ligong; Fan, Yi; Luo, Jinsong ..; McCready, David E.; Wang, Chong M.; An, Linan

2005-02-01

254

The nature of photoinduced changes in the magnetostriction of yttrium-iron garnet single crystals  

NASA Astrophysics Data System (ADS)

A model of the occurrence of photoinduced changes in linear magnetostriction is proposed based on a complex experimental study of magnetostrictive strains in yttrium-iron garnets Y3Fe5O12 with low contents of different impurities. Analytical expressions for calculating the magnetostriction in yttrium-iron garnet single crystals with different types of doping are presented. The correlation of the photoinduced change in the magnetostriction with the crystallographic features of the samples is demonstrated. The changes in the magnetostriction constants are analyzed quantitatively for samples prepared in different ways.

Vorob'eva, N. V.

2011-05-01

255

Anisotropic Optical-Response of Eu-doped Yttrium Orthosilicate  

NASA Technical Reports Server (NTRS)

Eu-doped yttrium orthosilicate (Eu(3+) : Y2SiO5) had been a subject being investigated for coherent time-domain optical memory and information processing applications since its ultraslow optical dephasing was discovered several years ago. In this crystal the weakly allowed (7)F0 - (5)D0 transition of europium ions exhibits a sufficient long dephasing time and no spectral difli.usion on a time scale of several hours at low temperature, thus an information pattern or data can be stored as a population grating in the ground state hyperfine levels. On the other hand, the study on photon-echo relaxation shows that the dephasing time T2 of Eu (3+) and other rare-earth ions doped YAG, YAlO3 strongly depends on the intensity of the excitation pulses. In Eu (3+) :YAlO3, an exponential decay of photon-echo with T2 = 53 microseconds if the excitation pulses are weak (5 vJ/pulse) was observed. However, when the excitation pulses are strong (80 pJ/pulse) they observed a much shortened T2 with a highly nonexponential decay pattern. The conclusion they derived is that the intensity-dependent dephasing rate effects are quite general, and it depends on how much the excitation intensity varies. In this paper we use transient grating formation technique showing that a temporal lattice distortion may only occur along crystal c axis, caused by EU (3+) excitation. At high excitation level the produced exciton in conduction band may also couple to the dynamical lattice relaxation process, giving rise to an apparently much shortened dephasing time.

Liu, Huimin; Santiago, Miguel; Jia, Weiyi; Zhang, Shoudu

1998-01-01

256

Peptoid-ligated pentadecanuclear yttrium and dysprosium hydroxy clusters.  

PubMed

A new family of pentadecanuclear coordination cluster compounds (from now on simply referred to as clusters) [{Ln15 (OH)20 (PepCO2 )10 (DBM)10 Cl}Cl4 ] (PepCO2 =2-[{3-(((tert-butoxycarbonyl)amino)methyl)benzyl}amino]acetate, DBM=dibenzoylmethanide) with Ln=Y and Dy was obtained by using the cell-penetrating peptoid (CPPo) monomer PepCO2 H and dibenzoylmethane (DBMH) as supporting ligands. The combination of an inorganic cluster core with an organic cell-penetrating peptoid in the coordination sphere resulted in a core component {Ln15 (?3 -OH)20 Cl}(24+) (Ln=Y, Dy), which consists of five vertex-sharing heterocubane {Ln4 (?3 -OH)4 }(8+) units that assemble to give a pentagonal cyclic structure with one Cl atom located in the middle of the pentagon. The solid-state structures of both clusters were established by single-crystal X-ray crystallography. MS (ESI) experiments suggest that the cluster core is robust and maintained in solution. Pulsed gradient spin echo (PGSE) NMR diffusion measurements were carried out on the diamagnetic yttrium compound and confirmed the stability of the cluster in its dicationic form [{Y15 (?3 -OH)20 (PepCO2 )10 (DBM)10 Cl}Cl2 ](2+) . The investigation of both static (dc) and dynamic (ac) magnetic properties in the dysprosium cluster revealed a slow relaxation of magnetization, indicative of single-molecule magnet (SMM) behavior below 8?K. Furthermore, the ?T product as a function of temperature for the dysprosium cluster gave evidence that this is a ferromagnetically coupled compound below 11?K. PMID:25483296

Thielemann, Dominique T; Wagner, Anna T; Lan, Yanhua; Oña-Burgos, Pascual; Fernández, Ignacio; Rösch, Esther S; Kölmel, Dominik K; Powell, Annie K; Bräse, Stefan; Roesky, Peter W

2015-02-01

257

Hanford isotope project strategic business analysis yttrium-90 (Y-90)  

SciTech Connect

The purpose of this analysis is to address the short-term direction for the Hanford yttrium-90 (Y-90) project. Hanford is the sole DOE producer of Y-90, and is the largest repository for its source in this country. The production of Y-90 is part of the DOE Isotope Production and Distribution (IP and D) mission. The Y-90 is ``milked`` from strontium-90 (Sr-90), a byproduct of the previous Hanford missions. The use of Sr-90 to produce Y-90 could help reduce the amount of waste material processed and the related costs incurred by the clean-up mission, while providing medical and economic benefits. The cost of producing Y-90 is being subsidized by DOE-IP and D due to its use for research, and resultant low production level. It is possible that the sales of Y-90 could produce full cost recovery within two to three years, at two curies per week. Preliminary projections place the demand at between 20,000 and 50,000 curies per year within the next ten years, assuming FDA approval of one or more of the current therapies now in clinical trials. This level of production would incentivize private firms to commercialize the operation, and allow the government to recover some of its sunk costs. There are a number of potential barriers to the success of the Y-90 project, outside the control of the Hanford Site. The key issues include: efficacy, Food and Drug Administration (FDA) approval and medical community acceptance. There are at least three other sources for Y-90 available to the US users, but they appear to have limited resources to produce the isotope. Several companies have communicated interest in entering into agreements with Hanford for the processing and distribution of Y-90, including some of the major pharmaceutical firms in this country.

NONE

1995-10-01

258

Root Cause Analysis of Gastroduodenal Ulceration After Yttrium-90 Radioembolization  

SciTech Connect

IntroductionA root cause analysis was performed on the occurrence of gastroduodenal ulceration after hepatic radioembolization (RE). We aimed to identify the risk factors in the treated population and to determine the specific mechanism of nontarget RE in individual cases. Methods: The records of 247 consecutive patients treated with yttrium-90 RE for primary (n = 90) or metastatic (n = 157) liver cancer using either resin (n = 181) or glass (n = 66) microspheres were reviewed. All patients who developed a biopsy-proven microsphere-induced gastroduodenal ulcer were identified. Univariate and multivariate analyses were performed on baseline parameters and procedural data to determine possible risk factors in the total population. Individual cases were analyzed to ascertain the specific cause, including identification of the culprit vessel(s) leading to extrahepatic deposition of the microspheres. Results: Eight patients (3.2 %) developed a gastroduodenal ulcer. Stasis during injection was the strongest independent risk factor (p = 0.004), followed by distal origin of the gastroduodenal artery (p = 0.004), young age (p = 0.040), and proximal injection of the microspheres (p = 0.043). Prolonged administrations, pain during administration, whole liver treatment, and use of resin microspheres also showed interrelated trends in multivariate analysis. Retrospective review of intraprocedural and postprocedural imaging showed a probable or possible culprit vessel, each a tiny complex collateral vessel, in seven patients. Conclusion: Proximal administrations and those resulting in stasis of flow presented increased risk for gastroduodenal ulceration. Patients who had undergone bevacizumab therapy were at high risk for developing stasis.

Lam, Marnix G. E. H. [Stanford University School of Medicine, Division of Interventional Radiology (United States); Banerjee, Subhas [Stanford University School of Medicine, Division of Gastroenterology and Hepatology (United States)] [Stanford University School of Medicine, Division of Gastroenterology and Hepatology (United States); Louie, John D.; Abdelmaksoud, Mohamed H. K. [Stanford University School of Medicine, Division of Interventional Radiology (United States)] [Stanford University School of Medicine, Division of Interventional Radiology (United States); Iagaru, Andrei H. [Stanford University School of Medicine, Division of Nuclear Medicine and Molecular Imaging (United States)] [Stanford University School of Medicine, Division of Nuclear Medicine and Molecular Imaging (United States); Ennen, Rebecca E.; Sze, Daniel Y., E-mail: dansze@stanford.edu [Stanford University School of Medicine, Division of Interventional Radiology (United States)

2013-12-15

259

Measurement of excitation functions in alpha-induced reactions on yttrium  

NASA Astrophysics Data System (ADS)

The excitation functions of 89g,m,90,91m,92mNb,88,89Zr, and 87g,m,88,90m,91mY from alpha-induced reactions on 89Y were measured from their respective threshold to 45 MeV by using a stacked-foil activation technique at the MC-50 cyclotron of the Korean Institute of Radiological and Medical Sciences. The results were compared with the earlier reported data as well as with the theoretical values obtained from the TENDL-2013 library based on the TALYS1.6 code. Our measurements in the energy region from the threshold energy to 45 MeV are in general good agreement with the other experimental data and calculated results. The integral yields for thick target of the produced radionuclides were also deduced from their measured cross sections and the stopping power of 89Y. The measured excitation functions find importance in various practical applications including nuclear medicine and improvement of nuclear model calculations.

Shahid, Muhammad; Kim, Kwangsoo; Naik, Haladhara; Zaman, Muhammad; Kim, Guinyun; Yang, Sung-Chul; Song, Tae-Young

2015-01-01

260

[Thyroid nodule. Study of 88 cases].  

PubMed

We present a prospective study of 88 patients with thyroid nodules seen in our institution in 1985-86 and the results of a 5 year follow up. The algorithm for resolution among different therapeutic options was established in regard to the clinical characteristics, imaging and particularly the histopathologic studies. Their age ranged from 18 to 79 years; 94% of the patients were females. Most of the nodules were solid (69%) and measured 1-4 cm in diameter. The image of 62% of the thyroid scans was of a non-functioning nodule and 13% were hyperfunctioning. In 80% the ultrasonographic pattern was solid or mixed. Surgery was undertaken in 19 patients (21%). In 58%, a diagnosis of malignancy was established. The biopsy (aspiration and tru-cut) suggested the presence of the malignant tumors when taken together in 90% of the cases. Hormonal treatment was given to 62 patients; in 40-45% of them there was a significant reduction in the size of the nodule. Aspiration and sclerosis of cystic nodules were performed in 19 patients with significant shrinkage in 82%. Radioactive iodine was used in 11 patients. Our algorithm reduces costs and precludes unnecessary morbidity in patients with thyroid nodules. PMID:8484067

González Treviño, O; Bolaños Gil, F; Lerman Garber, I; García-Rubí, E; Maisterrena Fernández, J A

1993-01-01

261

7 CFR 983.88 - Suspension or termination.  

Code of Federal Regulations, 2014 CFR

...AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS AND ORDERS; FRUITS, VEGETABLES, NUTS), DEPARTMENT OF AGRICULTURE PISTACHIOS GROWN IN CALIFORNIA, ARIZONA, AND NEW MEXICO Miscellaneous Provisions § 983.88 Suspension or...

2014-01-01

262

7 CFR 983.88 - Suspension or termination.  

Code of Federal Regulations, 2012 CFR

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2012-01-01

263

7 CFR 983.88 - Suspension or termination.  

Code of Federal Regulations, 2013 CFR

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2013-01-01

264

7 CFR 983.88 - Suspension or termination.  

Code of Federal Regulations, 2010 CFR

...AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE PISTACHIOS GROWN IN CALIFORNIA, ARIZONA, AND NEW MEXICO Miscellaneous Provisions § 983.88 Suspension or...

2010-01-01

265

7 CFR 983.88 - Suspension or termination.  

Code of Federal Regulations, 2011 CFR

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2011-01-01

266

7 CFR 1214.88 - OMB control numbers.  

Code of Federal Regulations, 2013 CFR

...AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE CHRISTMAS TREE PROMOTION, RESEARCH, AND INFORMATION ORDER Christmas Tree Promotion, Research, and Information Order Miscellaneous § 1214.88 OMB...

2013-01-01

267

7 CFR 1214.88 - OMB control numbers.  

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2012-01-01

268

7 CFR 1214.88 - OMB control numbers.  

Code of Federal Regulations, 2014 CFR

...AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE CHRISTMAS TREE PROMOTION, RESEARCH, AND INFORMATION ORDER Christmas Tree Promotion, Research, and Information Order Miscellaneous § 1214.88 OMB...

2014-01-01

269

7 CFR 1230.88 - Patents, copyrights, inventions, and publications.  

Code of Federal Regulations, 2012 CFR

...SERVICE (MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE PORK PROMOTION, RESEARCH, AND CONSUMER INFORMATION Pork Promotion, Research, and Consumer Information Order Miscellaneous § 1230.88...

2012-01-01

270

7 CFR 1230.88 - Patents, copyrights, inventions, and publications.  

Code of Federal Regulations, 2013 CFR

...SERVICE (MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE PORK PROMOTION, RESEARCH, AND CONSUMER INFORMATION Pork Promotion, Research, and Consumer Information Order Miscellaneous § 1230.88...

2013-01-01

271

7 CFR 1230.88 - Patents, copyrights, inventions, and publications.  

Code of Federal Regulations, 2011 CFR

...SERVICE (MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE PORK PROMOTION, RESEARCH, AND CONSUMER INFORMATION Pork Promotion, Research, and Consumer Information Order Miscellaneous § 1230.88...

2011-01-01

272

7 CFR 1230.88 - Patents, copyrights, inventions, and publications.  

Code of Federal Regulations, 2014 CFR

...SERVICE (MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE PORK PROMOTION, RESEARCH, AND CONSUMER INFORMATION Pork Promotion, Research, and Consumer Information Order Miscellaneous § 1230.88...

2014-01-01

273

Enhanced Sintering of Yttrium-Doped Barium Zirconate by Addition of ZnO  

E-print Network

Enhanced Sintering of Yttrium-Doped Barium Zirconate by Addition of ZnO Peter Babilo and Sossina M properties of doped barium zirconate have been examined. With the use of zinc ox- ide as a sintering aid, Ba of the material under flowing CO2 showed ZnO-modified barium zirconate to exhibit excellent chemical stability

Haile, Sossina M.

274

Cation non-stoichiometry in yttrium-doped barium zirconate: phase behavior, microstructure, and proton conductivity  

E-print Network

Cation non-stoichiometry in yttrium-doped barium zirconate: phase behavior, microstructure approach in which the barium deficiency is precisely controlled. The perovskite phase is tolerant to barium-phase region barium deficiency also has a detrimental impact on grain boundary conductivity, as a result both

275

Mechanisms for the cathodoluminescence of cerium-doped yttrium aluminum garnet phosphors  

NASA Astrophysics Data System (ADS)

We examine the luminescent properties of cerium-doped yttrium aluminum garnet (Ce:YAG) under cathodoluminescence. The cerium emission is strongly affected by the presence of intrinsic defects it the crystal. We show that a model based on non-radiative energy transfer is compatible with the results obtained from cathodoluminescence exreriments.

Rotman, Stanley R.; Aizenberg, Gustavo E.; Gordon, E. S.; Tuller, Harry L.; Warde, Cardinal

1991-04-01

276

Formation and crystallization in the yttrium aluminosilicate glasses containing zinc oxide  

SciTech Connect

Formation of yttrium aluminosilicate glasses containing zinc oxide from batches melted at 1550/sup 0/c was investigated. Densities, thermal expansion coefficients, and Vickers hardnesses were measured for some glasses. In a specific compositional region, crystals with a convex and pyramidal habit were observed on the glass surface.

Makishima, A.; Kubo, H.; Kotani, K.; Tsutsumi, M.; Asami, M.

1986-12-01

277

Yttrium 90 synovectomy in the management of chronic knee arthritis: a single institution experience  

Microsoft Academic Search

Radiation synovectomy (RS) has been used to treat chronically inflamed joints refractory to treatment using conventional agents. In RS, the radioactive isotope is concentrated in the synovial membrane from the injected colloid suspension, where it exerts its activity. However, despite numerous reports confirming its safety and efficacy, this procedure is not widely practised. In the Singleton Hospital NHS Trust, yttrium

Rojymon Jacob; T. Smith; B. Prakasha; T. Joannides

2003-01-01

278

The effect of yttrium and thorium on the oxidation behavior of Ni-Cr-Al alloys  

NASA Technical Reports Server (NTRS)

The effect of quaternary additions of 0.5% Y, 0.5 and 1.0% Th to a base alloy of Ni-10CR-5Al on the oxidation behavior and mechanism was studied during oxidation in air over the range of 1000 to 1200 C. The presence of yttrium decreased the oxidation kinetics slightly, whereas, the addition of thorium caused a slight increase. Oxide scale adherence was markedly improved by the addition of the quaternary elements. Although a number of oxides formed on yttrium containing alloys, quantitative X-ray diffraction clearly showed that the rate-controlling step was the diffusion of aluminum through short circuit paths in a thin layer of alumina that formed parabolically with time. Although the scale adherence of the yttrium containing alloy was considerably better than the base alloys, spalling did occur that was attributed to the formation of the voluminous YAG particles which grew in a mushroom-like manner, lifting the protective scale off the subrate locally. The YAG particles formed primarily at grain boundaries in the substrate in which the yttrium originally existed as YNi9.

Kumar, A.; Nasrallah, M.; Douglass, D. L.

1974-01-01

279

Modification of crystal growth mechanism of yttrium oxalate in metastable solution  

Microsoft Academic Search

In the seeded crystallization of yttrium oxalate from a metastable supersaturated solution, the growth mechanism was observed to become modified by variations in agitation and additive concentration. From the desupersaturation curve, the crystal growth rate was estimated and described using a power law of supersaturation (RT=Kg?Cp). Without an additive in the metastable solution, the overall growth rate coefficient, Kg, increased

Min-Hyun Sung; Joon-Soo Kim; Woon-Soo Kim; Izumi Hirasawa; Woo-Sik Kim

2002-01-01

280

Growth of Erbium doped Yttrium oxide thin films by atomic layer deposition  

NASA Astrophysics Data System (ADS)

Er-doped Yttrium oxide (Er^3+:Y2O3) has gained recent attention for its possible use in optoelectronic devices. Here we report the use of atomic layer deposition (ALD) to synthesize thin films of Yttrium oxide with various doping levels of Erbium ions (Er^3+) using different chemistries. ALD uses self-limiting surface reactions to deposit highly conformal thin films over large areas and substrates of arbitrary shape. This allows for the uniform layered doping of Yttrium oxide with Er^3+. The spatial separation of the Erbium ions can be controlled using organometallic precursors with varying ligand sizes. The doping concentration (volume ratio of Er^3+ sites to Y^3+ sites) is controlled by the ratio of the precursor pulses. We comprehensively studied ALD-grown films of Er^3+:Y2O3 obtained from the Erbium precursors Er(MCp)3 and Er(BA)3 and the Yttrium precursors Y(MCp)3 and Y(Cp)3 using either water or hydrogen peroxide as an oxygen source. Detailed description of the studied optical and spectroscopic properties, stoichiometry, and physical characteristics of these films will be presented.

Becker, Nicholas; Proslier, Thomas; Klug, J.; Elam, J.; Sanamyan, T.; Dubinckii, M.; Girolami, J.; Pellin, M.

2011-03-01

281

Phase compositions in magnesium-rare earth alloys containing yttrium, gadolinium or dysprosium  

Microsoft Academic Search

Phase compositions have been investigated, using thin foil energy dispersive X-ray spectroscopy, in three magnesium-rare earth alloys, containing yttrium, gadolinium or dysprosium. Compositions are suggested for the as-cast eutectic and ? precipitate phases and possible compositions for the ?1 precipitate phases are discussed.

P. J. Apps; H. Karimzadeh; J. F. King; G. W. Lorimer

2003-01-01

282

Effect of Rare Earth Yttrium on the Hot Ductility of Fe-36Ni Invar Alloy  

NASA Astrophysics Data System (ADS)

The hot ductility of Fe-36Ni invar alloy doped with and without yttrium was investigated using a Gleeble-3800 thermal-mechanical simulator over the temperature range 850-1050 °C and the improvement mechanism of the hot ductility was analysed with a combination of SEM, EDS and OM. The results showed that Fe-36Ni invar alloy had a poor hot ductility below 1050 °C, which was mainly attributed to the presence of the grain boundary sliding and weak grain boundaries. The addition of 0.048% yttrium had a substantial improvement in the hot ductility of Fe-36Ni invar alloy over the whole testing temperature range especially at 950-1000 °C. At 850-900 °C, the improvement of the hot ductility was mainly associated with the grain boundary strengthening and the restriction of the grain boundary sliding because the addition of yttrium could reduce the segregation of sulfur at grain boundaries and refine the grain structure. At 950-1000 °C, the hot ductility was highly improved, which was owed to the acceleration and occurrence of dynamic recrystallization as a result of the refinement of the grain structure by addition of yttrium.

Yu, Y. C.; Liu, H. T.; Chen, W. Q.; Zheng, H. G.

2014-12-01

283

Raman calibration of the HT-7 yttrium aluminum garnet Thomson scattering for electron density measurements  

SciTech Connect

A multipulse neodym doped yttrium aluminum garnet laser Thomson scattering system calibrated by the anti-Stokes rotational Raman scattering from nitrogen gas had been developed in the HT-7 superconducting Tokmak. By virtue of this system, measured electron density results of the plasma were obtained. The results showed good repeatability and its total uncertainty was estimated to be {+-}18%.

Zang Qing; Zhao Junyu; Gao Xiang; Shi Lingwei; Zhang Tao; Xi Xiaoqi; Yang Li; Hu Qingsheng; Sajjad, S. [Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui 230031 (China)

2007-11-15

284

Preliminary results on a new method for producing yttrium phosphorous microspheres.  

PubMed

This paper reports on a new method to embed phosphorus particles into the matrix of yttrium aluminum silicate microspheres. Yttrium phosphorus glass microspheres about 20µm in size were obtained when an aqueous solution of YCl3 and AlCl3 were added to tetraethyl orthosilicate (TEOS) (phosphoric acid was used to catalyze the hydrolysis and condensation of TEOS) and was pumped into silicone oil under constant stirring. The shapes of the particles produced by this method are regular and nearly spheric in shape. Paper chromatography was used to determine the radiochemical impurity of radioactive microspheres. Radionuclide purity was determined using a gamma spectrometry system and an ultra-low level liquid scintillation spectrometer. The P(+) ions implantation stage was eliminated by embedding phosphorus particles in the matrix of the glass microspheres. This paper shows that a high temperature is not required to produce yttrium phosphorus aluminum silicate microspheres. The result shows that the silicone oil spheroidization method is a very suitable way to produce yttrium phosphorus glass microspheres. The topographical analysis of microspheres shows that the Y, P, Si, and Al elements are distributed in the microspheres and the distribution of elements in the samples is homogenous. PMID:24998745

Ghahramani, M R; Garibov, A A; Agayev, T N

2014-09-01

285

Dye adsorption on mesoporous activated carbon fiber obtained from pitch containing yttrium complex  

Microsoft Academic Search

The adsorption of acid dyes (Acid Blue 9, Acid Blue 74, Acid Orange 10, and Acid Orange 51), direct dyes (Direct Black 19, Direct Yellow 11, and Direct Yellow 50), and basic dyes (Basic Brown 1 and Basic Violet 3) on a highly mesoporous activated carbon fiber (Y-ACF) obtained from pitch containing yttrium acetylacetonate was investigated in terms of size

Hisashi Tamai; Takeshi Yoshida; Masahiko Sasaki

1999-01-01

286

Local oxygen diffusion induced in Ca-doped yttrium iron garnet films by laser annealing  

Microsoft Academic Search

Local inward and outward oxygen diffusion induced in Ca-doped yttrium iron garnet films by laser annealing in controlled atmospheres is reported for the first time. This allows changing locally and reversibly the concentration of Fe4+ ions, which control the electrical and infrared optical properties of the material. The effects of laser annealing were investigated by measuring in the irradiated regions

B. Antonini; P. Paroli; C. Salustri

1985-01-01

287

Characterization of ferrous ions in hafnium-doped yttrium iron garnet  

Microsoft Academic Search

The ferrous content of hafnium-doped yttrium iron garnet crystals has been determined by a number of methods and microwave measurements of the temperature dependence of the anisotropy constant found to give the most reliable value. The Fe2+ ions have a doublet energy level lying lowest with a maximum splitting of 75 cm-1.

J. M. Robertson; D. Elwell

1969-01-01

288

Photosensitivity of the magnetic anisotropy in silicon-doped yttrium iron garnet  

Microsoft Academic Search

Measurements are reported of the change in the magnetic field at ferromagnetic resonance due to irradiation of a sample of silicon-doped yttrium iron garnet with plane polarised infra-red. The effects are in accord with a simple model.

R. W. Teale; D. I. Weatherley; B. T. Sharp

1969-01-01

289

Experimental study of the photoinduction mechanism in silicon-doped yttrium iron garnet by means of  

Microsoft Academic Search

It has recently been proposed that the photosensitive impurity centers in silicon-doped yttrium iron garnet, which are the active sites in the processes giving rise to photoinduced dichroism, should also exhibit magnetic circular dichroism (MCD). This property of the photomagnetic centers was labeled \\

B. Antonini; A. Paoletti; P. Paroli; A. Tucciarone; J. F. Dillon Jr.; E. M. Gyorgy; J. P. Remeika

1975-01-01

290

Low-Temperature Anomaly in Ferrimagnetic Resonance of Ytterbium-Doped Yttrium Iron Garnet  

Microsoft Academic Search

The field for ferrimagnetic resonance at helium temperatures of YIG in which small amounts of ytterbium have been substituted for yttrium is known to show sharp excursions as a function of applied field direction. These are inconsistent with the accepted energy-level scheme of Yb3+ ions in such a system. It is shown here on the basis of extended resonance studies

J. F. Dillon; J. P. Remeika; L. R. Walker

1967-01-01

291

Blocking process evidenced by magnetic circular dichroism on doped yttrium-iron garnets  

Microsoft Academic Search

Magnetic circular dichroism on doped yttrium-iron garnet varies monotonically upon cooling below room temperature at near infrared wavelengths. This variation tends to vanish at lower temperature. The same behavior is observed in three distinct samples doped with Sn, Zr and Sb, respectively. The interpretation assumes a population variation of Fe2+ ions in different environmental coordination and different orientation with respect

F. D'Orazio; F. Giammaria; F. Lucari

1992-01-01

292

Parametric amplification of surface acoustic wave of ZnO-Ga-doped yttrium iron garnet  

Microsoft Academic Search

Interactions of surface acoustic wave (SAW) with magnetization are investigated on a ZnO-Ga-doped yttrium iron garnet (YIG) and GGG structure. The attenuation of SAW depends on the input power of SAW due to a nonlinear interaction with the magnetization of the YIG. Parametric amplification of SAW is closely related to the magnetic field strength and the input power. The amplification

R. Inaba; N. Mikoshiba

1982-01-01

293

Ferrimagnetic Resonance in Rare-Earth-Doped Yttrium Iron Garnet. III. Linewidth  

Microsoft Academic Search

Measurements of ferrimagnetic resonance linewidth have been made for single crystals of yttrium iron garnet (YIG) doped with each of the 4f rare earths (except Ce, Gd, Pm, and Lu). Starting from the lowest temperatures, the linewidth increases to a maximum in the range 30 to 150°K, and then decreases. Some structure is apparent in these curves; they are anisotropic;

J. F. Dillon

1962-01-01

294

Effects of yttrium, aluminum and chromium concentrations in bond coatings on the performance of zirconia-yttria thermal barriers  

NASA Technical Reports Server (NTRS)

A cyclic furnace study was conducted on thermal barrier systems to evaluate the effects of yttrium, chromium and aluminum in nickel-base alloy bond coatings and the effect of bond coating thickness on yttria-stabilized zirconia thermal barrier coating life. Without yttrium in the bond coatings, the zirconia coatings failed very rapidly. Increasing chromium and aluminum in the Ni-Cr-Al-Y bond coatings increased total coating life. This effect was not as great as that due to yttrium. Increased bond coat thickness was also found to increase life.

Stecura, S.

1980-01-01

295

Effects of yttrium, aluminum and chromium concentrations in bond coatings on the performance of zirconia-yttria thermal barriers  

NASA Technical Reports Server (NTRS)

A cyclic furnace study was conducted on thermal barrier systems to evaluate the effects of yttrium, chromium, and aluminum in nickel-base alloy bond coatings and the effect of bond coating thickness on yttria-stabilized zirconia thermal barrier coating life. Without yttrium in the bond coatings, the zirconia coatings failed very rapidly. Increasing chromium and aluminum in the Ni-Cr-Al-Y bond coatings increased total coating life. This effect was not as great as that due to yttrium. Increased bond coat thickness was also found to increase life.

Stecura, S.

1980-01-01

296

Effects of yttrium, aluminum and chromium concentrations in bond coatings on the performance of zirconia-yttria thermal barriers  

NASA Technical Reports Server (NTRS)

A cyclic furnace study was conducted on thermal barrier systems to evaluate the effects of yttrium, chromium and aluminum in nickel-base alloy bond coatings and the influence of the bond coating thickness on yttria-stabilized zirconia thermal barrier coating lifetimes. Without yttrium in the bond coatings, the zirconia coatings failed very rapidly. Increasing concentrations of chromium and aluminum in the Ni-Cr-Al-Y bond coatings increased the total coating lifetimes. This effect was not as great as that due to yttrium. Increased bond coating thickness was also found to increase the lifetimes.

Stecura, S.

1980-01-01

297

10 CFR 71.88 - Air transport of plutonium.  

Code of Federal Regulations, 2014 CFR

...2014-01-01 2014-01-01 false Air transport of plutonium. 71.88 Section...Controls and Procedures § 71.88 Air transport of plutonium. (a...or delivered to a carrier for air transport unless: (1) The...

2014-01-01

298

10 CFR 71.88 - Air transport of plutonium.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Air transport of plutonium. 71.88 Section...Controls and Procedures § 71.88 Air transport of plutonium. (a...or delivered to a carrier for air transport unless: (1) The...

2010-01-01

299

ISI TechnicalManual ISI/TM-88-197  

E-print Network

ISI TechnicalManual ISI/TM-88-197 February1988 University ofSouthern California Gabriel Robins %% ... ... .. The ISI Grapher Manual INFORMATION SCIENCES 213/822-1511 INSTITUTEJ f-"-676 292-t5466Admiralty Way. MONITORING ORGANIZATION REPORT NUMBER(S) ISI/TM-88-197 6a. NAME OF PERFORMING ORGANIZATION USC

Robins, Gabriel

300

ISI ReprintSeries ISIIRS-88-210  

E-print Network

ISI ReprintSeries ISIIRS-88-210 June1988 University ofSouthern California Gabriel Robins Applications of the ISI Grapher Reprinted from Proceedingsof the ArtificialIntelligenceand Advanced Computer PERFORMING ORGANIZATION REPORT NUMBER(S) 5. MONITORING ORGANIZATION REPORT NUMBER(S) ISI/RS-88

Robins, Gabriel

301

Recovery of niobium from irradiated targets  

DOEpatents

A process for selective separation of niobium from proton irradiated molybdenum targets is provided and includes dissolving the molybdenum target in a hydrogen peroxide solution to form a first ion-containing solution, contacting the first ion-containing solution with a cationic resin whereby ions selected form the group consisting of molybdenum, biobium, technetium, selenium, vanadium, arsenic, germanium, zirconium and rubidium remain in a second ion-containing solution while ions selected from the group consisting of rubidium, zinc, beryllium, cobalt, iron, manganese, chromium, strontium, yttrium and zirconium are selectively adsorbed by the cationic resin; adjusting the pH of the second ion-containing solution to within a range of from about 5.0 to about 6.0; contacting the pH adjusting second ion-containing solution with a dextran-based material for a time to selectively separate niobium from the solution and recovering the niobium from the dextran-based material.

Phillips, Dennis R. (Los Alamos, NM); Jamriska, Sr., David J. (Los Alamos, NM); Hamilton, Virginia T. (Los Alamos, NM)

1994-01-01

302

STS-88 Mission Commander Robert D. Cabana suits up for TCDT  

NASA Technical Reports Server (NTRS)

STS-88 Mission Commander Robert D. Cabana suits up in the Operations and Checkout Building prior, as part of flight crew equipment fit check, to his trip to Launch Pad 39A. He is helped by suit tech (right) Lloyd Armintor and an unidentified KSC worker. The crew are at KSC to participate in the Terminal Countdown Demonstration Test (TCDT) which includes mission familiarization activities, emergency egress training, and the simulated main engine cut-off exercise. This is Cabana's fourth space flight. Mission STS-88 is targeted for launch on Dec. 3, 1998. It is the first U.S. flight for the assembly of the International Space Station and will carry the Unity connecting module.

1998-01-01

303

Safety and efficacy of (90) yttrium-ibritumomab-tiuxetan for untreated follicular lymphoma patients. An Italian cooperative study.  

PubMed

(90) Yttrium ((90) Y)-Ibritumomab-Tiuxetan combines the targeting advantage of a monoclonal antibody with the radiosensitivity of Follicular Lymphoma (FL). Previous studies showed that 90Y-IT is safe and effective in relapsed/refractory indolent FL, irrespective of prior treatment with rituximab. This multicentre trial aimed to evaluate the safety and the efficacy of "upfront" single-agent ((90) Y)-Ibritumomab-Tiuxetan in advanced-stage FL. The primary objective was the incidence of responses in terms of complete (CR) and partial remission (PR). Fifty patients with stage II "bulky", III or IV FL received a single treatment course with ((90) Y)-Ibritumomab-Tiuxetan as initial therapy. The median age was 60 years. Bone marrow involvement (<25%) was observed in 24 patients (48%) and 7 (14%) had an elevated lactate dehydrogenase level. The overall response (ORR) and CR rates were 94% and 86%, respectively with a median follow-up of 38·8 months. The median progression-free survival (PFS) was not reached, whereas the 3-year estimated PFS and overall survival (OS) rate was 63·4% and 90%, respectively. Grade 3/4 neutropenia and thrombocytopenia occurred in 30% and 26% of patients respectively; none experienced grade 3/4 non-haematological toxicity. No cases of secondary haematological malignancies were observed. ((90) Y)-Ibritumomab-Tiuxetan was demonstrated to be highly effective and safe as first-line treatment for advanced-stage FL. PMID:24344981

Ibatici, Adalberto; Pica, Gian Matteo; Nati, Sandro; Vitolo, Umberto; Botto, Barbara; Ciochetto, Chiara; Petrini, Mario; Galimberti, Sara; Ciabatti, Elena; Orciuolo, Enrico; Zinzani, Pier Luigi; Cascavilla, Nicola; Guolo, Fabio; Fraternali Orcioni, Giulio; Carella, Angelo M

2014-03-01

304

Effects of yttrium, aluminum, and chromium concentrations in bond coatings on the performance of zirconia-yttria thermal barriers  

NASA Technical Reports Server (NTRS)

A cyclic furnace study was conducted between 990 - 280 C and 1095 - 280 C to evaluate the effects of yttrium, chromium, and aluminum concentrations in nickel base alloy bond coatings and also the effect of the bond coating thickness on the performance of yttria-stabilized zirconia thermal barrier coatings. The presence and the concentration of yttrium is very critical. Without yttrium, rapid oxidation of Ni-Al, Ni-Cr, and Ni-Cr-Al bond coatings causes zirconia thermal barrier coatings to fail very rapidly. Concentrations of chrominum and aluminum in Ni-Cr-Al-Y bond coating have a very significant effect on the thermal barrier coating life. This effect, however, is not as great as that due to yttrium. Furthermore, the thickness and the thickness uniformity also have a very significant effect on the life of the thermal barrier system.

Stecura, S.

1979-01-01

305

Intestinal epithelium-specific MyD88 signaling impacts host susceptibility to infectious colitis by promoting protective goblet cell and antimicrobial responses.  

PubMed

Intestinal epithelial cells (IECs), including secretory goblet cells, form essential physiochemical barriers that separate luminal bacteria from underlying immune cells in the intestinal mucosa. IECs are common targets for enteric bacterial pathogens, with hosts responding to these microbes through innate toll-like receptors that predominantly signal through the MyD88 adaptor protein. In fact, MyD88 signaling confers protection against several enteric bacterial pathogens, including Salmonella enterica serovar Typhimurium and Citrobacter rodentium. Since IECs are considered innately hyporesponsive, it is unclear whether MyD88 signaling within IECs contributes to this protection. We infected mice lacking MyD88 solely in their IECs (IEC-Myd88(-/-)) with S. Typhimurium. Compared to wild-type (WT) mice, infected IEC-Myd88(-/-) mice suffered accelerated tissue damage, exaggerated barrier disruption, and impaired goblet cell responses (Muc2 and RELM?). Immunostaining revealed S. Typhimurium penetrated the IECs of IEC-Myd88(-/-) mice, unlike in WT mice, where they were sequestered to the lumen. When isolated crypts were assayed for their antimicrobial actions, crypts from IEC-Myd88(-/-) mice were severely impaired in their antimicrobial activity against S. Typhimurium. We also examined whether MyD88 signaling in IECs impacted host defense against C. rodentium, with IEC-Myd88(-/-) mice again suffering exaggerated tissue damage, impaired goblet cell responses, and reduced antimicrobial activity against C. rodentium. These results demonstrate that MyD88 signaling within IECs plays an important protective role at early stages of infection, influencing host susceptibility to infection by controlling the ability of the pathogen to reach and survive at the intestinal mucosal surface. PMID:24958710

Bhinder, Ganive; Stahl, Martin; Sham, Ho Pan; Crowley, Shauna M; Morampudi, Vijay; Dalwadi, Udit; Ma, Caixia; Jacobson, Kevan; Vallance, Bruce A

2014-09-01

306

Comparison of the oxidation resistances of yttrium implanted low manganese and low manganese–carbon steels at high temperature  

Microsoft Academic Search

Yttrium implanted and unimplanted low manganese and low manganese–carbon steel samples were analyzed at T=700°C and under an oxygen partial pressure PO2=0.04 Pa for 24 h to show the yttrium implantation effect on sample high temperature oxidation resistances. Sample oxidation weight gains were studied by thermogravimetry and structural analyses were performed by in-situ high temperature X-ray diffraction (XRD) with the

E. Caudron; H Buscail

2000-01-01

307

Effect of Rare Earth Yttrium on the Hot Ductility of Eco-friendly Bi-S Based Free Cutting Steel  

NASA Astrophysics Data System (ADS)

The hot ductility of eco-friendly Bi-S based free cutting steels micro-alloyed with and without yttrium was studied using a Gleeble-1500 thermal-mechanical simulator over the temperature range 850-1200 °C. The results showed that the addition of rare earth yttrium had a substantial improvement in the hot ductility of Bi-S based free-cutting steel, especially at 1000 °C. The beneficial effect of yttrium on the hot ductility of Bi-S based free-cutting steel at the temperature no less than 1000 °C was mainly associated to the refinement of austenite grain size, which could effectively reduce the segregation density of bismuth at the grain boundary, and the lowering of the DRX onset temperature by yttrium addition. At 850-950 °C, the improvement of the hot ductility in these steels by yttrium addition might be attributed to the reduction of the low melting point sulphides at grain boundary and the refinement of the austenite grain size. However, the hot ductility of these steels micro-alloyed with yttrium was still poor at 850-950 °C, which was mainly owning to the presence of pro-eutectoid ferrite films and the absence of dynamic recrystallization as well as the segregation of liquid bismuth films at austenite grain boundaries.

Liu, Haitao; Chen, Weiqing; Qi, Fengyou; Li, Wenying

2014-09-01

308

Successful Treatment of Laser Induced Hypopigmentation with Narrowband Ultraviolet B Targeted Phototherapy  

PubMed Central

Q-switched 1064 nm neodymium-doped yttrium aluminium garnet (Qs 1064 nm Nd: YAG) laser plays an important role in the treatment of pigmentary skin disorders, including tattoos. Although it has high efficacy and safety, adverse effect like hypopigmentation may occur causing anxiety to patients. We present a case report of Qs 1064 nm Nd: YAG laser induced hypopigmentation which was successfully treated with ultraviolet B targeted phototherapy, with rapid and satisfactory re-pigmentation. PMID:24023438

Mysore, Venkataram; Anitha, B; Hosthota, Abhineetha

2013-01-01

309

88. EXTERIOR VIEW, SOUTH SIDE, SHOWING 1883 FARM ADDITION (BACKGROUND), ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

88. EXTERIOR VIEW, SOUTH SIDE, SHOWING 1883 FARM ADDITION (BACKGROUND), AND BLACKSMITH SHOP ADDITION OF 1905. SMALL STRUCTURE ON RIGHT IS AN OUTHOUSE. - Gruber Wagon Works, Pennsylvania Route 183 & State Hill Road at Red Bridge Park, Bernville, Berks County, PA

310

88. Reproduction from glass plate negative (original in Modjeski and ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

88. Reproduction from glass plate negative (original in Modjeski and Masters office, Harrisburg, Pennsylvania, Modjeski Collection, No. 4, not dated) LOOKING DOWNSTREAM - Burlington Northern Railroad Bridge, Spanning Willamette River at River Mile 6.9, Portland, Multnomah County, OR

311

7 CFR 8.8 - Use by public informational services.  

Code of Federal Regulations, 2013 CFR

...Agriculture Office of the Secretary of Agriculture 4-H CLUB NAME AND EMBLEM § 8.8 Use by public informational services...business firms, commercial products or services, either by 4-H Clubs, other 4-H organizations and affiliated groups,...

2013-01-01

312

7 CFR 8.8 - Use by public informational services.  

Code of Federal Regulations, 2010 CFR

...Agriculture Office of the Secretary of Agriculture 4-H CLUB NAME AND EMBLEM § 8.8 Use by public informational services...business firms, commercial products or services, either by 4-H Clubs, other 4-H organizations and affiliated groups,...

2010-01-01

313

7 CFR 8.8 - Use by public informational services.  

Code of Federal Regulations, 2014 CFR

...Agriculture Office of the Secretary of Agriculture 4-H CLUB NAME AND EMBLEM § 8.8 Use by public informational services...business firms, commercial products or services, either by 4-H Clubs, other 4-H organizations and affiliated groups,...

2014-01-01

314

7 CFR 8.8 - Use by public informational services.  

Code of Federal Regulations, 2011 CFR

...Agriculture Office of the Secretary of Agriculture 4-H CLUB NAME AND EMBLEM § 8.8 Use by public informational services...business firms, commercial products or services, either by 4-H Clubs, other 4-H organizations and affiliated groups,...

2011-01-01

315

7 CFR 8.8 - Use by public informational services.  

Code of Federal Regulations, 2012 CFR

...Agriculture Office of the Secretary of Agriculture 4-H CLUB NAME AND EMBLEM § 8.8 Use by public informational services...business firms, commercial products or services, either by 4-H Clubs, other 4-H organizations and affiliated groups,...

2012-01-01

316

40 CFR 146.88 - Injection well operating requirements.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Injection well operating requirements. 146...Class VI Wells § 146.88 Injection well operating requirements. ...maintain mechanical integrity of the injection well at all times. (e) The...

2011-07-01

317

40 CFR 146.88 - Injection well operating requirements.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Injection well operating requirements. 146...Class VI Wells § 146.88 Injection well operating requirements. ...maintain mechanical integrity of the injection well at all times. (e) The...

2013-07-01

318

40 CFR 146.88 - Injection well operating requirements.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Injection well operating requirements. 146...Class VI Wells § 146.88 Injection well operating requirements. ...maintain mechanical integrity of the injection well at all times. (e) The...

2012-07-01

319

29 CFR 452.88 - Resumption of good standing.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF LABOR LABOR-MANAGEMENT STANDARDS GENERAL STATEMENT CONCERNING THE ELECTION PROVISIONS OF THE LABOR-MANAGEMENT REPORTING AND DISCLOSURE ACT OF 1959 Right To Vote § 452.88 Resumption of good standing. While it is...

2010-07-01

320

40 CFR 8.8 - Comprehensive environmental evaluation.  

Code of Federal Regulations, 2013 CFR

...Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL ENVIRONMENTAL IMPACT ASSESSMENT OF NONGOVERNMENTAL ACTIVITIES IN ANTARCTICA § 8.8 Comprehensive environmental evaluation. (a) Preparation of a CEE. Unless a PERM or an IEE...

2013-07-01

321

40 CFR 8.8 - Comprehensive environmental evaluation.  

Code of Federal Regulations, 2012 CFR

...Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL ENVIRONMENTAL IMPACT ASSESSMENT OF NONGOVERNMENTAL ACTIVITIES IN ANTARCTICA § 8.8 Comprehensive environmental evaluation. (a) Preparation of a CEE. Unless a PERM or an IEE...

2012-07-01

322

40 CFR 600.113-88 - Fuel economy calculations.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Fuel economy calculations. 600.113-88 Section...CONTINUED) ENERGY POLICY FUEL ECONOMY AND CARBON-RELATED EXHAUST EMISSIONS OF MOTOR VEHICLES Fuel Economy and Carbon-Related Exhaust...

2011-07-01

323

38 CFR 4.88a - Chronic fatigue syndrome.  

Code of Federal Regulations, 2014 CFR

...and Veterans' Relief DEPARTMENT OF VETERANS AFFAIRS SCHEDULE FOR RATING DISABILITIES Disability Ratings Infectious Diseases, Immune Disorders and Nutritional Deficiencies § 4.88a Chronic fatigue syndrome. (a) For VA...

2014-07-01

324

38 CFR 4.88a - Chronic fatigue syndrome.  

Code of Federal Regulations, 2011 CFR

...and Veterans' Relief DEPARTMENT OF VETERANS AFFAIRS SCHEDULE FOR RATING DISABILITIES Disability Ratings Infectious Diseases, Immune Disorders and Nutritional Deficiencies § 4.88a Chronic fatigue syndrome. (a) For VA...

2011-07-01

325

38 CFR 4.88a - Chronic fatigue syndrome.  

Code of Federal Regulations, 2012 CFR

...and Veterans' Relief DEPARTMENT OF VETERANS AFFAIRS SCHEDULE FOR RATING DISABILITIES Disability Ratings Infectious Diseases, Immune Disorders and Nutritional Deficiencies § 4.88a Chronic fatigue syndrome. (a) For VA...

2012-07-01

326

38 CFR 4.88a - Chronic fatigue syndrome.  

Code of Federal Regulations, 2010 CFR

...and Veterans' Relief DEPARTMENT OF VETERANS AFFAIRS SCHEDULE FOR RATING DISABILITIES Disability Ratings Infectious Diseases, Immune Disorders and Nutritional Deficiencies § 4.88a Chronic fatigue syndrome. (a) For VA...

2010-07-01

327

38 CFR 4.88a - Chronic fatigue syndrome.  

Code of Federal Regulations, 2013 CFR

...and Veterans' Relief DEPARTMENT OF VETERANS AFFAIRS SCHEDULE FOR RATING DISABILITIES Disability Ratings Infectious Diseases, Immune Disorders and Nutritional Deficiencies § 4.88a Chronic fatigue syndrome. (a) For VA...

2013-07-01

328

42 CFR 88.14 - Standard for determining medical necessity.  

Code of Federal Regulations, 2011 CFR

... Standard for determining medical necessity. 88.14 Section...OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES WORLD... Standard for determining medical necessity. All treatment...which has been included in the medical treatment protocols...

2011-10-01

329

42 CFR 88.14 - Standard for determining medical necessity.  

Code of Federal Regulations, 2014 CFR

... Standard for determining medical necessity. 88.14 Section...OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES WORLD... Standard for determining medical necessity. All treatment...which has been included in the medical treatment protocols...

2014-10-01

330

42 CFR 88.14 - Standard for determining medical necessity.  

Code of Federal Regulations, 2013 CFR

... Standard for determining medical necessity. 88.14 Section...OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES WORLD... Standard for determining medical necessity. All treatment...which has been included in the medical treatment protocols...

2013-10-01

331

40 CFR 146.88 - Injection well operating requirements.  

Code of Federal Regulations, 2014 CFR

...2014-07-01 2014-07-01 false Injection well operating requirements. 146...Class VI Wells § 146.88 Injection well operating requirements. ...maintain mechanical integrity of the injection well at all times. (e) The...

2014-07-01

332

40 CFR 282.88 - Pennsylvania State-Administered Program.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Pennsylvania State-Administered Program...Approved State Programs § 282.88 Pennsylvania State-Administered Program. (a) The Commonwealth of Pennsylvania's underground storage...

2012-07-01

333

40 CFR 282.88 - Pennsylvania State-Administered Program.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Pennsylvania State-Administered Program...Approved State Programs § 282.88 Pennsylvania State-Administered Program. (a) The Commonwealth of Pennsylvania's underground storage...

2011-07-01

334

40 CFR 282.88 - Pennsylvania State-Administered Program.  

Code of Federal Regulations, 2014 CFR

...2014-07-01 2014-07-01 false Pennsylvania State-Administered Program...Approved State Programs § 282.88 Pennsylvania State-Administered Program. (a) The Commonwealth of Pennsylvania's underground storage...

2014-07-01

335

40 CFR 282.88 - Pennsylvania State-Administered Program.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Pennsylvania State-Administered Program...Approved State Programs § 282.88 Pennsylvania State-Administered Program. (a) The Commonwealth of Pennsylvania's underground storage...

2010-07-01

336

40 CFR 282.88 - Pennsylvania State-Administered Program.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Pennsylvania State-Administered Program...Approved State Programs § 282.88 Pennsylvania State-Administered Program. (a) The Commonwealth of Pennsylvania's underground storage...

2013-07-01

337

Photoelectric Photometry of Asteriods 29 Amphitrite and 88 Thisbe  

Microsoft Academic Search

Photoelectric photometry observations of the asteroids 29 Amphitrite and 88 Thisbe were made from North Valley Stream Observatory during the period August 29 to September 1, 1986 UT. The lightcurves for both asteroids are consistent with previously determined rotation periods.

F. J. Melillo

1987-01-01

338

42 CFR 88.3 - Eligibility-currently identified responders.  

Code of Federal Regulations, 2013 CFR

...PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES WORLD TRADE CENTER HEALTH PROGRAM § 88.3 Eligibility—currently identified responders. (a) Responders who...

2013-10-01

339

42 CFR 88.3 - Eligibility-currently identified responders.  

Code of Federal Regulations, 2012 CFR

...PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES WORLD TRADE CENTER HEALTH PROGRAM § 88.3 Eligibility—currently identified responders. (a) Responders who...

2012-10-01

340

42 CFR 88.7 - Eligibility-currently identified survivors.  

Code of Federal Regulations, 2011 CFR

...PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES WORLD TRADE CENTER HEALTH PROGRAM § 88.7 Eligibility—currently identified survivors. (a) Survivors who have...

2011-10-01

341

42 CFR 88.15 - Appeals regarding treatment.  

Code of Federal Regulations, 2012 CFR

...PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES WORLD TRADE CENTER HEALTH PROGRAM § 88.15 Appeals regarding treatment. (a) Individuals may appeal the...

2012-10-01

342

42 CFR 88.7 - Eligibility-currently identified survivors.  

Code of Federal Regulations, 2013 CFR

...PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES WORLD TRADE CENTER HEALTH PROGRAM § 88.7 Eligibility—currently identified survivors. (a) Survivors who have...

2013-10-01

343

42 CFR 88.14 - Standard for determining medical necessity.  

Code of Federal Regulations, 2012 CFR

...PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES WORLD TRADE CENTER HEALTH PROGRAM § 88.14 Standard for determining medical necessity. All treatment provided under the...

2012-10-01

344

A composite MyD88/CD40 switch synergistically activates mouse and human dendritic cells for enhanced antitumor efficacy  

PubMed Central

The in vivo therapeutic efficacy of DC-based cancer vaccines is limited by suboptimal DC maturation protocols. Although delivery of TLR adjuvants systemically boosts DC-based cancer vaccine efficacy, it could also increase toxicity. Here, we have engineered a drug-inducible, composite activation receptor for DCs (referred to herein as DC-CAR) comprising the TLR adaptor MyD88, the CD40 cytoplasmic region, and 2 ligand-binding FKBP12 domains. Administration of a lipid-permeant dimerizing ligand (AP1903) induced oligomerization and activation of this fusion protein, which we termed iMyD88/CD40. AP1903 administration to vaccinated mice enabled prolonged and targeted activation of iMyD88/CD40-modified DCs. Compared with conventionally matured DCs, AP1903-activated iMyD88/CD40-DCs had increased activation of proinflammatory MAPKs. AP1903-activated iMyD88/CD40-transduced human or mouse DCs also produced higher levels of Th1 cytokines, showed improved migration in vivo, and enhanced both antigen-specific CD8+ T cell responses and innate NK cell responses. Furthermore, treatment with AP1903 in vaccinated mice led to robust antitumor immunity against preestablished E.G7-OVA lymphomas and aggressive B16.F10 tumors. Thus, the iMyD88/CD40 unified “switch” effectively and safely replaced exogenous adjuvant cocktails, allowing remote and sustained DC activation in vivo. DC “licensing” through iMyD88/CD40 may represent a mechanism by which to exploit the natural synergy between the TLR and CD40 signaling pathways in DCs using a single small molecule drug and could augment the efficacy of antitumor DC-based vaccines. PMID:21383499

Narayanan, Priyadharshini; Lapteva, Natalia; Seethammagari, Mamatha; Levitt, Jonathan M.; Slawin, Kevin M.; Spencer, David M.

2011-01-01

345

Barium and Yttrium abundance in intermediate-age and old open clusters  

E-print Network

Barium is a neutron capture element, that, in open clusters, is frequently over-abundant with respect to the Iron. A clear explanation for this is still missing. Additionally, its gradient across the Galactic disk is poorly constrained. We measure the abundance of yttrium and barium using the synthetic spectrum method from UVES high-resolution spectra of eight distant open clusters, namely Ruprecht 4, Ruprecht 7, Berkeley 25, Berkeley 73, Berkeley 75, NGC 6192, NGC 6404, and NGC 6583. The barium abundance was estimated using NLTE approximation. We confirm that Barium is indeed over-abundant in most clusters, especially young clusters. Finally, we investigated the trend of yttrium and barium abundances as a function of distance in the Galaxy and ages. Several scenarios for the barium over-abundance are then discussed.

Mishenina, T; Carraro, G; Kovtyukh, V V; Yegorova, I A

2013-01-01

346

Mott insulator-to-metal transition in yttrium-doped CaIrO3.  

PubMed

We report on the study of insulator-to-metal transition in post-perovskite compound CaIrO3. It is discovered that a gradual chemical substitution of calcium by yttrium leads to the onset of strong metallic behavior in this compound. This observation is in stark contrast to BaIrO3, which preserves its Mott insulating behavior despite excess of the charge carriers due to yttrium doping. Magnetic measurements reveal that both compounds tend to exhibit magnetic character irrespective of the chemical substitution of Ca or Ba. We analyze these unusual observations in light of recent researches that suggest that CaIrO3 does not necessarily possess j = 1/2 ground state due to structural distortion. The insulator-to-metal transition in CaIrO3 will spur new researches to explore more exotic ground state, including superconductivity, in post-perovskite Mott insulators. PMID:25605689

Gunasekera, J; Chen, Y; Kremenak, J W; Miceli, P F; Singh, D K

2015-02-11

347

Co-sputtering yttrium into hafnium oxide thin films to produce ferroelectric properties  

SciTech Connect

Thin film capacitors were fabricated by sputtering TiN-Y doped HfO{sub 2}-TiN stacks on silicon substrates. Yttrium was incorporated into the HfO{sub 2} layers by simultaneously sputtering from Y{sub 2}O{sub 3} and HfO{sub 2} sources. Electric polarization and relative permittivity measurements yield distinct ferroelectric properties as a result of low yttrium dopant concentrations in the range of 0.9-1.9 mol. %. Grazing incidence x-ray diffraction measurements show the formation of an orthorhombic phase in this range. Compared to atomic layer deposition films, the highest remanent polarization and the highest relative permittivity were obtained at significantly lower doping concentrations in these sputtered films.

Olsen, T. [NaMLab gGmbH, 01187 Dresden (Germany); Department of Electrical and Computer Engineering, University of Alberta, Edmonton T6G 2V4 (Canada); Schroeder, U.; Mueller, S.; Krause, A.; Martin, D.; Singh, A. [NaMLab gGmbH, 01187 Dresden (Germany); Mueller, J. [Fraunhofer CNT, 01099 Dresden (Germany); Geidel, M. [Institute of Semiconductors and Microsystems, Technische Universitaet Dresden, 01062 Dresden (Germany); Mikolajick, T. [NaMLab gGmbH, 01187 Dresden (Germany); Institute of Semiconductors and Microsystems, Technische Universitaet Dresden, 01062 Dresden (Germany)

2012-08-20

348

Mechanism for radiation damage resistance in yttrium oxide dispersion strengthened steels  

NASA Astrophysics Data System (ADS)

ODS steels based on yttrium oxide have been suggested as potential fusion reactor wall materials due to their observed radiation resistance properties. Presumably this radiation resistance can be related to the interaction of the particle with vacancies, self-interstitial atoms (SIAs) and other radiation damage debris. Density functional theory has been used to investigate this at the atomic scale. Four distinct interfaces, some based on HRTEM observations, between iron and yttrium oxide were investigated. It is been shown that the Y2O3-Fe interface acts as a strong trap with long-range attraction for both interstitial and vacancy defects, allowing recombination without altering the interface structure. The catalytic elimination of defects without change to the microstructure explains the improved behaviour of ODS steels with respect to radiation creep and swelling.

Brodrick, J.; Hepburn, D. J.; Ackland, G. J.

2014-02-01

349

Extraction of tritium from impure lithium by yttrium: a thermochemical treatment of the problem  

NASA Astrophysics Data System (ADS)

Thermochemical analysis is performed in the systems Li-Y-O-H, Li-Y-N-H and Li-Y-O-N and isothermal quaternary Ellingham diagrams are presented. From this analysis it is found that the mixed oxide LiYO 2 will be formed on the surface of yttrium used to extract tritium from impure lithium. Other layers of impurities on yttrium will be replaced by LiYO 2. This could be the reason for the large variation of the coefficient of the mass transfer in extraction experiments. The necessity to use temperatures higher than 1100 K and add hydrogen to the sweep gas, in order to release the extracted tritium, is explained by the reduction of the LiYO 2 layer to Y 2O 3 and gaseous LiOH.

Migge, H.

1984-05-01

350

Mott insulator-to-metal transition in yttrium-doped CaIrO3  

NASA Astrophysics Data System (ADS)

We report on the study of insulator-to-metal transition in post-perovskite compound CaIrO3. It is discovered that a gradual chemical substitution of calcium by yttrium leads to the onset of strong metallic behavior in this compound. This observation is in stark contrast to BaIrO3, which preserves its Mott insulating behavior despite excess of the charge carriers due to yttrium doping. Magnetic measurements reveal that both compounds tend to exhibit magnetic character irrespective of the chemical substitution of Ca or Ba. We analyze these unusual observations in light of recent researches that suggest that CaIrO3 does not necessarily possess j = 1/2 ground state due to structural distortion. The insulator-to-metal transition in CaIrO3 will spur new researches to explore more exotic ground state, including superconductivity, in post-perovskite Mott insulators.

Gunasekera, J.; Chen, Y.; Kremenak, J. W.; Miceli, P. F.; Singh, D. K.

2015-02-01

351

First principles DFT investigation of yttrium-doped graphene: Electronic structure and hydrogen storage  

SciTech Connect

The electronic structure and hydrogen storage capability of Yttrium-doped grapheme has been theoretically investigated using first principles density functional theory (DFT). Yttrium atom prefers the hollow site of the hexagonal ring with a binding energy of 1.40 eV. Doping by Y makes the system metallic and magnetic with a magnetic moment of 2.11 ?{sub B}. Y decorated graphene can adsorb up to four hydrogen molecules with an average binding energy of 0.415 eV. All the hydrogen atoms are physisorbed with an average desorption temperature of 530.44 K. The Y atoms can be placed only in alternate hexagons, which imply a wt% of 6.17, close to the DoE criterion for hydrogen storage materials. Thus, this system is potential hydrogen storage medium with 100% recycling capability.

Desnavi, Sameerah, E-mail: sameerah-desnavi@zhcet.ac.in [Department of Electronic Engineering, ZHCET, Aligarh Muslim University, Aligarh-202002 (India); Chakraborty, Brahmananda; Ramaniah, Lavanya M. [High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai-400085 (India)

2014-04-24

352

Spectroscopic investigation of the Cr to Tm energy transfer in Yttrium Aluminum Garnet (YAG) crystals  

NASA Technical Reports Server (NTRS)

New and interesting schemes have recently been considered for the efficient operation of solid-state ionic laser systems. Often the available data on these systems were obtained only because they seemed directly related to the laser performance and provide no insight into the physical processes. A more systematic approach is desirable, where more attention is devoted to the elementary basic processes and to the nature of the mechanisms at work. It is with this aim that we have undertaken the present study. Yttrium Aluminum Garnet (Y4Al5O12), called YAG, has two desirable properties as host for rare earth impurities: (1) trivalent rare earth ions can replace the yttrium without any charge compensation problem, and (2) YAG crystals have high cutoff energies. The results of measurements and calculations indicate that the Cr(3+) ion in YAG can be used to sensitize efficiently the Tm(3+) ion.

Dibartolo, B.

1988-01-01

353

Synthesis and characterization of photoluminescent cerium-doped yttrium aluminum garnet  

SciTech Connect

Powder phosphor yttrium aluminum garnet (YAG), doped with trivalent cerium (Ce{sup 3+}) is synthesized by sol-gel method. The formation of YAG and YAG:Ce (cerium-doped yttrium aluminum garnet) was investigated by means of X-ray diffraction (XRD). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were also used. The purified crystalline phases of YAG and YAG:Ce were obtained at 1000 deg. C. The maximum average grain size is about 20-23 nm for undoped samples and 28-34 nm for doped samples. The crystalline YAG:Ce emission shows one peak in the range 480-535 nm with the maximum near 520 nm. Photoluminescence (PL) intensity of 5d {yields} 4f transition of Ce{sup 3+} increased with increasing annealing temperature. With increasing the concentration of Ce{sup 3+}, the photoluminescence peak shifts towards the red region.

Fadlalla, H.M.H. [Department of Physics, Central China Normal University, Wuhan 430079 (China)], E-mail: fadlalla8@hotmail.com; Tang, C.C.; Elssfah, E.M.; Zhang, J.; Ammar, E.; Lin, J.; Ding, X.X. [Department of Physics, Central China Normal University, Wuhan 430079 (China)

2008-12-01

354

Magnetoelastic modes and lifetime of magnons in thin yttrium iron garnet films  

NASA Astrophysics Data System (ADS)

We calculate the effects of the spin-lattice coupling on the magnon spectrum of thin ferromagnetic films consisting of the magnetic insulator yttrium iron garnet. The magnon-phonon hybridization generates a characteristic minimum in the spin dynamic structure factor which quantitatively agrees with recent Brillouin light scattering experiments. We also show that at room temperature the phonon contribution to the magnon damping exhibits a rather complicated momentum dependence: In the exchange regime the magnon damping is dominated by Cherenkov type scattering processes, while in the long-wavelength dipolar regime these processes are subdominant and the magnon damping is two orders of magnitude smaller. We supplement our calculations by actual measurements of the magnon relaxation in the dipolar regime. Our theory provides a simple explanation of a recent experiment probing the different temperatures of the magnon and phonon gases in yttrium iron garnet.

Rückriegel, Andreas; Kopietz, Peter; Bozhko, Dmytro A.; Serga, Alexander A.; Hillebrands, Burkard

2014-05-01

355

Exceptional field theory. III. E8(8)  

NASA Astrophysics Data System (ADS)

We develop exceptional field theory for E8(8), defined on a (3+248)-dimensional generalized spacetime with extended coordinates in the adjoint representation of E8(8). The fields transform under E8(8) generalized diffeomorphisms and are subject to covariant section constraints. The bosonic fields include an "internal" dreibein and an E8(8)-valued "zweihundertachtundvierzigbein" (248-bein). Crucially, the theory also features gauge vectors for the E8(8) E bracket governing the generalized diffeomorphism algebra and covariantly constrained gauge vectors for a separate but constrained E8(8) gauge symmetry. The complete bosonic theory, with a novel Chern-Simons term for the gauge vectors, is uniquely determined by gauge invariance under internal and external generalized diffeomorphisms. The theory consistently comprises components of the dual graviton encoded in the 248-bein. Upon picking particular solutions of the constraints the theory reduces to D =11 or type IIB supergravity, for which the dual graviton becomes pure gauge. This resolves the dual graviton problem, as we discuss in detail.

Hohm, Olaf; Samtleben, Henning

2014-09-01

356

Selective internal radiation therapy for nonresectable hepatocellular carcinoma with intraarterial infusion of 90yttrium microspheres  

Microsoft Academic Search

Purpose: To evaluate the efficacy of intraarterial 90yttrium (90Y) microspheres in nonresectable hepatocellular carcinoma (HCC).Methods and Materials: Patients with nonresectable HCC, but without extrahepatic disease, who also had lung shunting < 15% and tumor-to-normal ratio ?2, as determined by simulation using 99mtechnetium macroaggregated albumin, were entered into the study. The radiation dose delivered to the lungs, tumor, and normal liver

W. Y. Lau; S. Ho; T. W. T. Leung; M. Chan; R. Ho; P. J. Johnson; A. K. C. Li

1998-01-01

357

Peripheral Blood Lymphocyte Depletion After Hepatic Arterial {sup 90}Yttrium Microsphere Therapy for Hepatocellular Carcinoma  

SciTech Connect

Purpose: The short- and long-term effects of {sup 90}Yttrium microspheres therapy for hepatocellular carcinoma (HCC) on peripheral blood lymphocytes are unknown and were therefore examined. Methods and Materials: Ninety-two HCC patients were enrolled in a {sup 90}Yttrium therapy study and routine blood counts were examined as part of standard clinical monitoring. Results: We found an early, profound, and prolonged lymphopenia. In a subsequent cohort of 25 additional HCC patients, prospective flow cytometric immune-monitoring analysis was performed to identify specific changes on distinct lymphocyte subsets (i.e., CD3, CD4, CD8 T, and CD19 B lymphocytes) and NK cells absolute numbers, in addition to the granulocytes and platelets subsets. We found that the pretreatment lymphocyte subset absolute numbers (with the exception of NK cells) had a tendency to be lower compared with healthy control values, but no significant differences were detected between groups. Posttherapy follow-up revealed that overall, all lymphocyte subsets, except for NK cells, were significantly (>50% from pretherapy values), promptly (as early as 24 h) and persistently (up to 30 months) depleted post-{sup 90}Yttrium microspheres therapy. In contrast, granulocytes increased rapidly (24 h) to compensate for lymphocyte depletion, and remained increased at 1-year after therapy. We further stratified patients into two groups, according to survival at 1 year. We found that lack of recovery of CD19, CD3, CD8, and especially CD4 T cells was linked to poor patient survival. No fungal or bacterial infections were noted during the 30-month follow-up period. Conclusions: The results show that lymphocytes (and not granulocytes, platelets, or NK cells) are sensitive to hepatic arterial {sup 90}Yttrium without associated clinical toxicity, and lack of lymphocyte recovery (possibly leading to dysregulation of adaptive cellular immunity) posttherapy indicates poor survival.

Carr, Brian I., E-mail: brianicarr@hotmail.com [Department of Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA and Department of Nutrition and Exptl Biology, Saverio De Bellis Medical Research Institute, Castellana Grotte, Bari (Italy); Metes, Diana M. [Department of Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA and Department of Nutrition and Exptl Biology, Saverio De Bellis Medical Research Institute, Castellana Grotte, Bari (Italy)

2012-03-01

358

Optical spectroscopy of yttrium double phosphates doped by cerium and praseodymium ions  

Microsoft Academic Search

This paper reports the spectroscopic properties of cerium- and praseodymium-doped alkali metal yttrium double phosphates, M3Y(PO4)2:Pr3+, Ce3+; M = Na, Rb. These phosphates were obtained by a solid state reaction between lanthanide phosphate hydrates and M3PO4. The absorption, reflection, emission and excitation spectra were measured at room temperature, 77 and 4K in the IR-vis-ultraviolet (UV) range. For both the Ce3+-

M. Guzik; T. Aitasalo; W. Szuszkiewicz; J. Hölsä; B. Keller; J. Legendziewicz

2004-01-01

359

SUR LES SPECTRES DE L'YTTRIUM, DE L'ERBIUM, DU DIDYME ET DU LANTHANE,  

E-print Network

33 SUR LES SPECTRES DE L'YTTRIUM, DE L'ERBIUM, DU DIDYME ET DU LANTHANE, PAR M. ROB. THAL�N,~=ttriuln, erbium, etc. e j~ . Le but principal de la recherche em question fut de contrôler, au moyen de l'analysespectrale, s'il a été possible aux chimistes de sé- parer entre ceux les sels d'yttriuiii et d erbium. et (eux

Paris-Sud XI, Université de

360

Thermoelectric properties of W-Re composite strengthened by nanoparticles of yttrium oxide  

NASA Astrophysics Data System (ADS)

Characteristics of the thermocouples with W5%Re against W20%Re thermoelements were studied when the positive thermoelement was made of a composite with addition of 0.1% yttrium oxide nanoparticles having an average size of 50nm. Physical, mechanical and thermoelectric properties of the composite as well as its structural features were determined. The conditions of thermal EMF stabilization for the modified thermocouple were established under high temperatures annealing.

Oleynikov, P. P.; Zaytsev, P. A.; Turchin, V. N.; Ulanovskiy, A. A.; Nenashev, S. N.

2013-09-01

361

Hydrothermal synthesis, crystal structures and photoluminescence properties of mixed europium-yttrium organic frameworks  

SciTech Connect

Three mixed europium-yttrium organic frameworks: Eu{sub 2-x}Y{sub x}(Mel)(H{sub 2}O){sub 6} (Mel=mellitic acid or benzene-1,2,3,4,5,6-hexacarboxylic acid, x=0.38 1, 0.74 2, and 0.86 3) have been synthesized and characterized. All the compounds contain a 3-D net with (4, 8)-flu topology. The study indicates that the photoluminescence properties are effectively affected by the different ratios of europium and yttrium ions, the quantum efficiency is increased and the Eu{sup 3+} lifetime becomes longer in these MOFs than those of the Eu analog. - Graphical abstract: Three mixed europium and yttrium organic frameworks: Eu{sub 2-x}Y{sub x}(Mel)(H{sub 2}O){sub 6} (Mel=mellitic acid) have been synthesized and characterized. All the compounds contain a 3-D net with (4, 8)-flu topology. The study indicates that the photoluminescence properties are effectively affected by the different ratios of europium and yttrium ions, the quantum efficiency is increased and the Eu{sup 3+} lifetime becomes longer in these MOFs than those of the Eu analog. Highlights: Black-Right-Pointing-Pointer Three (4, 8)-flu topological mixed Eu and Y MOFs were synthesized under mild conditions. Black-Right-Pointing-Pointer Metal ratios were refined by the single crystal data consistent with the EDS analysis. Black-Right-Pointing-Pointer Mixed Eu and Y MOFs show longer lifetime and higher quantum efficiency than the Eu analog. Black-Right-Pointing-Pointer Adding inert lanthanide into luminescent MOFs enlarges the field of luminescent MOFs.

Han Yinfeng [Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro (Portugal); Department of Chemistry and Environmental Science, Taishan University, Taian 271021 (China); Fu Lianshe [Department of Physics, CICECO, University of Aveiro, 3810-193 Aveiro (Portugal); Mafra, Luis, E-mail: lmafra@ua.pt [Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro (Portugal); Shi, Fa-Nian, E-mail: fshi@ua.pt [Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro (Portugal)

2012-02-15

362

Evaluation of mineral content of dentin prepared by erbium, chromium:yttrium scandium gallium garnet laser  

Microsoft Academic Search

Laser etching has an effect on the mineral content of dentin. The aim of this study was to evaluate the mineral content of\\u000a dentin prepared at three different power settings with an erbium, chromium:yttrium scandium gallium garnet (Er,Cr:YSGG) laser.\\u000a The enamel of five, lower, wisdom, molar teeth was removed to expose the dentin surface. Four dentin slabs were obtained,\\u000a then

Asli Secilmis; Subutayhan Altintas; Aslihan Usumez; Gizem Berk

2008-01-01

363

CHARACTERIZATION OF CERIUM-DOPED YTTRIUM ALUMINIUM GARNET NANOPOWDERS SYNTHESIZED VIA SOL-GEL PROCESS  

Microsoft Academic Search

In this work the sol-gel process was used to prepare Ce-doped yttrium aluminium garnet (Y3Al5O12, YAG) samples. The synthesis products were characterized by infrared spectroscopy (IR), X-ray powder diffraction analysis (XRD), and transmission electron microscopy (TEM). The particle size and luminescence properties of synthesized samples were also determined. The XRD patterns of Y3Al5O12:Ce samples showed that phase purity of garnets

A. Katelnikovas; T. Jüstel; D. Uhlich; J.-E. Jørgensen; S. Sakirzanovas; A. Kareiva

2008-01-01

364

Obliterated urethra: holmium:yttrium-aluminum-garnet cut-to-light with urolume stenting.  

PubMed

Antegrade-retrograde urethrotomy, or the cut-to-light procedure, performed for obliterated urethra is associated with a high rate of recurrence of urethra] stricture. With the goal of reducing the stricture recurrence rate, we performed a modified cut-to-light procedure using a holmium:yttrium-aluminum-garnet laser and UroLume stenting in a 76-year-old man with urethral obliteration. PMID:11763485

Monga, M; Gordon, Z; Alexandrescu, B

2001-12-01

365

Water flow on erbium:yttrium–aluminum–garnet laser irradiation: effects on dental tissues  

Microsoft Academic Search

Since lasers were introduced in dentistry, there has been considerable advancement in technology. Several wavelengths have\\u000a been investigated as substitutes for high-speed air turbine. Owing to its high absorbability in water and hydroxyapatite,\\u000a the erbium:yttrium–aluminum–garnet (Er:YAG) laser has been of great interest among dental practitioners and scientists. In\\u000a spite of its great potential for hard tissue ablation, Er:YAG laser effectiveness

Vivian Colucci; Flávia Lucisano Botelho do Amaral; Jesus Djalma Pécora; Regina Guenka Palma-Dibb; Silmara Aparecida Milori Corona

2009-01-01

366

High compressive stresses in titanium nitride made by CVD and post-implanted with yttrium ions  

Microsoft Academic Search

The effect of implantation with the large, heavy ion, yttrium into TiN is measured over the depth range 0.1–2.6 ?m. The results confirm the earlier work: a compressive stress is developed in the implanted zone accompanied by a wide distribution of strain, indicative of extensive local disorder. Below this zone, the stress is compressive over the range of depths studied

Anthony J. Perry; Daniel E. Geist

1997-01-01

367

Efficient holmium:yttrium lithium fluoride laser longitudinally pumped by a semiconductor laser array  

NASA Technical Reports Server (NTRS)

Optical pumping of a holmium:yttrium lithium floride (Ho:YLF) crystal with a 790-nm continuous-wave diode-laser array has generated 56 mW of 2.1-micron laser radiation with an optical-to-optical conversion slope efficiency of 33 percent while the crystal temperature is held at 77 K. The lasing threshold occurs at 7 mW of input power, and laser operation continues up to a crystal temperature of 124 K.

Hemmati, H.

1987-01-01

368

Damping of magnetic domain-wall motion in pure and ytterbium-doped yttrium iron garnet  

Microsoft Academic Search

The domain-wall switching properties of pure yttrium iron garnet, YIG, and Yb-doped YIG are investigated from 1·5 to 300 °K. The measured domain-wall velocity ? depends on the applied field H according to the relation ? = R(H - H0) for walls parallel to the (110) and (211) crystallographic planes in YIG and to the (211) plane in Yb0·15 Y2·85Fe5O12.

H. Harper; R. W. Teale

1969-01-01

369

Application of yttrium in AZ61 magnesium alloy and the semi-solid AZ61 alloy  

Microsoft Academic Search

The semi-solid magnesium alloy slurry was prepared by a newly self-developed mechanical stirring machine for preparing continuous semi-solid slurry, the effects of rare earth elements yttrium on the ignition point, the casting microstructure, the semi-solid microstructure and mechanical properties of AZ61 magnesium alloy were studied in this paper. The experimental results showed that increasing the Y content would increase the

Zhou Bingfeng; Yan Hong

2010-01-01

370

Low Temperature Resistivity of Yttrium-Based Alloys Containing Small Amounts of Rare Earth Metals  

Microsoft Academic Search

The resistivity of the dilute alloys of rare earth metals with yttrium has been measured at low temperatures. The result is in qualitative agreement with the recent theories due to Kondo and others on the s--d or s--f scattering. The effective s--f exchange integrals for various rare-earth solutes have been derived from the analysis of the resistivity data and compared

Tadashi Sugawara

1965-01-01

371

Pressureless sintered self-reinforced yttrium-silicon aluminum oxygen nitride ceramics  

Microsoft Academic Search

This thesis is concerned with the study of the self-reinforcement behaviour and mechanical properties (hardness, fracture toughness and flexural strength) of Yttrium stablized SiAlON ceramics, which are the solid solutions of Si 3N4, Al2O3 and AlN. The overall objective of this work is to develop composition and microstructure of Si3N 4 ceramics that will possess a fracture toughness approaching that

Changran Zhou

2005-01-01

372

Superselective Internal Radiation With Yttrium-90 Microspheres in the Management of a Chemorefractory Testicular Liver Metastasis  

SciTech Connect

We treated a patient with biopsy-proven, chemotherapy-resistant testicular cancer liver metastasis using Y-90 selective internal radiation treatment. We chose yttrium-90 rather than surgery and ablation due to tumor location and size as well as the patient's clinical history. The result was marked tumor response by positron emission tomography and computed tomography as well as significant improvement of the patient's quality of life accompanied by a substantial decrease of his tumor markers.

Sideras, Panagiotis A.; Sofocleous, Constantinos T., E-mail: sofoclec@mskcc.org; Brody, Lynn A.; Siegelbaum, Robert H.; Shah, Rajesh P.; Taskar, Neeta-Pandit [Memorial Sloan Kettering Cancer Center (United States)

2012-04-15

373

The nature of p-type conduction in Ca-doped yttrium iron garnet films  

Microsoft Academic Search

Conductivity and magnetic circular dichroism (MCD) in the near infrared are measured in p-type Ca-doped yttrium iron garnet films. Two MCD components are known to arise in these films, associated with Ca2+ substitution: one peaked at about ?=1.2 ?m, the other one at ?=1.6 ?m. We show that the center responsible for the ?=1.6 ?m component is the only one

F. Scarinci; A. Tucciarone; B. Antonini; P. Paroli

1985-01-01

374

Anisotropy of the Hopping Integrals of Calcium Doped Yttrium Iron Garnet  

Microsoft Academic Search

\\u000a The main objective of this paper is to indicate a possible origin of strong magnetic anisotropy of the electric resistance\\u000a in calcium-doped yttrium-iron garnets (Ca : YIG). Recent measurements of the electric resistance of the as-grown Ca : YIG\\u000a samples show strong anisotropy connected with differ- ent orientations of the applied magnetic field with respect to the electric\\u000a current. The

A. Lehmann-Szweykowska; R. J. Wojciechowski; J. Barna?; P. E. Wigen

375

Photo-induced changes in the magnetic anisotropy of silicon-doped yttrium iron garnet  

Microsoft Academic Search

Measurements are reported of the changes in the magnetocrystalline anisotropy which were induced in specimens of silicon-doped yttrium iron garnet by irradiating them with a plane polarized infrared beam. The torque exerted by magnetically saturated samples was measured using a torque magnetometer at 4.2K. Single-crystal specimens of composition Y3Fe5-xSixO12 with x=0.035, 0.07 and 0.08 were studied. A semi phenomenological model

B. T. Sharp; R. W. Teale

1974-01-01

376

Physical and microwave characteristics of Gd-doping yttrium iron garnet (YIG)  

Microsoft Academic Search

Ferrimagnetic insulating yttrium iron garnet (YIG) are widely used in microwave devices due to their unique magnetic, electrical and microwave properties. The substitution of rare earth ion for the Y^3+ ion can modulate or improve its high-frequency properties for microwave application. We prepared a serial of single-phased polycrystalline Y3-xGdxFe5O12 garnet samples with x = -- 3.0 by the conventional ceramic

M. F. Tai; K. Z. Wang; L. R. Hong; C. J. Wu; L. C. Lin; H. C. Ku; S. Z. Liu; K. M. Kwo

2010-01-01

377

Bismuth-doped yttrium iron garnet guided-wave magnetooptic Bragg cells and applications  

Microsoft Academic Search

Superior performance figures obtained with guided-wave magnetooptic Bragg cells using magnetostatic forward volume waves (MSFVWs) in bismuth-doped yttrium iron garnet-gadolinium gallium garnet (YIG-GGG) waveguides operating at an optical wavelength of 1.303 ?m are reported. The figures include a center-frequency tuning range of 3.7 to 12.0 GHz, a diffraction efficiency of 12% at a MSFVW power of 56 mW and a

D. Young; C. S. Tsai

1989-01-01

378

Theory of magnetic behaviour in calcium-doped yttrium iron garnet  

Microsoft Academic Search

To study the magnetic ground-state of calcium-doped yttrium garnet (Ca2+: YIG) a two-sublattice Heisenberg Hamiltonian is introduced with the superexchange interactions between spins of Fe3+ ions, which can be modified by calcium doping. Assuming that p holes compensating the Ca2+ doping charge, are mobile, one obtains that a change in the superexchange coupling leaves the magnetic system translationally invariant. It

A. Lehmann-Szweykowska; A. Koper; R. Wojciechowski; T. Tomalak

1992-01-01

379

Spectral dependence of photoinduced optical absorption in doped yttrium iron garnet single crystals  

Microsoft Academic Search

The photoinduced optical absorption ? of doped yttrium iron garnets (YIG) is investigated. It is found that the optical absorption\\u000a ? at a wavelength of 1.1 m depends on the wavelength of irradiating light in the range 0.6–1.9 m. It is demonstrated that,\\u000a in the Y3Fe5O12 crystal with an acceptor Ba impurity, the photoinduced increase in ? is due to

R. A. Doroshenko; M. D. Nadezhdin

2001-01-01

380

Generation of ``type II'' Fe4+ ions in Ca2+ and F- doped yttrium iron garnet  

Microsoft Academic Search

Fe4+ ions in yttrium iron garnet belong to two different ``types'', having a number of markedly different properties, and whose relative abundance in the as-grown state appears not controllable through the growth conditions. This paper shows that, in bulk samples of YIG doped with Ca2+ and F- and containing only type I Fe4+ ions in the as-grown state, type II

L. Y. Liu; M. Marinelli; A. Paoletti; P. Paroli; A. Tucciarone

1989-01-01

381

Preparation of bismuth-doped yttrium iron garnets and their characterization  

Microsoft Academic Search

This paper presents the study of bismuth-doped yttrium iron garnets with composition Y3-xBixFe5O12 (Bi: YIG) prepared by sintrating of metal oxides for various sintrating conditions (times, temperatures, etc.). The structure of the samples was characterized by XRD patterns. The spectra, obtained by LIB (Laser Induced Breakdown) method that is based on the interaction of high power laser beam with studied

Jana Pigosová; Anna Kiliánová; Pavel Vojtek; Michal Kopcok; Alexander Cigán

2007-01-01

382

Polarization-Dependent Photoinduced Effects in Silicon-Doped Yttrium Iron Garnet  

Microsoft Academic Search

Polarization-dependent effects of light on the magnetic properties of silicon-doped yttrium iron garnet are described theoretically. The effects are identified with a process wherein photons selectively detach electrons from orientationally inequivalent Fe2+ centers. A crystal-field theory (including cubic-, trigonal-, and nontrigonal-distortion crystal fields) and spin-orbit coupling and exchange, is used to compute the wave functions for the different centers. The

Richard Alben; E. M. Gyorgy; J. F. Dillon; J. P. Remeika

1972-01-01

383

Photomagnetic Anneal, A New Magneto-Optic Effect, in Si-Doped Yttrium Iron Garnet  

Microsoft Academic Search

Experimental evidence is given to show that the magnetocrystalline anistropy of silicondoped yttrium iron garnet, nominal composition Y3Fe4.9Si0.1O12, can be changed by more than 100 Oe at 20°K through irradiation with near-infrared photons. The change is interpreted as due to the redistribution of electrons between iron ions, that is valence exchange.

R. W. Teale; D. W. Temple

1967-01-01

384

Magneto-optical effects of Rh3+ and Rh4+ doped yttrium iron garnet  

Microsoft Academic Search

The Faraday rotation and magnetic circular dichroism (MCD) were studied in yttrium iron garnet epitaxial films Y3Fe5O12 doped with trivalent and tetravalent rhodium ions. The magneto-optical effects were measured in the spectral region from 0.5 to 2.5 eV (500-2400 nm) at temperatures between 80 and 300 K. The change in valency of Rh transpired to have a huge effect on

M. Kucera; J. Kunes; R. Gerber

1999-01-01

385

Magneto-optical effects of Rh3+ and Rh4+ doped yttrium iron garnet  

Microsoft Academic Search

The Faraday rotation and magnetic circular dichroism (MCD) were studied in yttrium iron garnet epitaxial films Y3Fe5O12 doped with trivalent and tetravalent rhodium ions. The magneto-optical effects were measured in the spectral region from 0.5 to 2.5 eV (500–2400 nm) at temperatures between 80 and 300 K. The change in valency of Rh transpired to have a huge effect on

R. Gerber

1999-01-01

386

NEGATIVE RESISTANCE, CONDUCTIVE SWITCHING, AND MEMORY EFFECT IN SILICON-DOPED YTTRIUM-IRON GARNET CRYSTALS  

Microsoft Academic Search

A current-controlled negative resistance has been found in thin single-crystal wafers of silicon-doped yttrium-iron garnet (Si-YIG). Switching properties have been examined, and relaxation oscillations in the range 0.5–1 MHz have been established in the negative resistance region. A conductive memory state having a behavior similar to that occurring in amorphous semiconductors has also been seen.

D. C. Bullock; D. J. Epstein

1970-01-01

387

The anomalous ferrimagnetic resonance properties of ytterbium-doped yttrium iron garnet  

Microsoft Academic Search

In single-crystal specimens of yttrium iron garnet doped with small amounts of ytterbium the ferrimagnetic resonance linewidths and the fields for resonance show anomalous behaviour in certain crystallographic directions at low temperatures. This paper presents some observations of this anomalous behaviour at 16·8 and 9·3 Gc\\/s as functions of temperature (1·5-25°K), concentration of ytterbium ions (1·, 5·1 and 10·2%) and

B H Clarke

1967-01-01

388

Magnon and acoustic-phonon light scattering from Bi-doped yttrium iron garnet  

Microsoft Academic Search

Light scattering in Bi-substituted yttrium iron garnet has revealed different excitation-wavelength-dependent cross sections for the acoustic phonons and magnons. Analysis of the magnon and phonon frequencies showed a quadratic and linear dependence, respectively, with wave vector and models for these results indicate that the spin-wave stiffness constant is increased, while the sound velocity is reduced, by the substitution of Y

P. X. Zhang; D. J. Lockwood; H. J. Labbé

1993-01-01

389

Spontaneous and photoinduced linear dichroism in silicon doped yttrium iron garnet  

Microsoft Academic Search

Linear dichroism measurements are reported on a specimen of silicon doped yttrium iron garnet (YIG) with composition Y3Fe5-xSixO12 where x=0.08. Weak spontaneous dichroism ( approximately 5%) was observed when a specimen was placed in a saturating magnetic field at 300K. The magnitude of the dichroism, which was determined using a near infrared beam directed normal to the (110) plane, was

J. F. B. Hawkes; R. W. Teale

1972-01-01

390

Thermal Synthesis of Bismuth-Doped Yttrium Iron Garnet for Magneto-Optical Imaging  

Microsoft Academic Search

This contribution deals with the preparation and characterization of bismuth-doped yttrium iron garnets with composition BiY2Fe5O12 (Bi:YIG). The samples have been prepared by sintering of metal oxides homogenized in acetone for 10 minutes. The estimated average crystallite size of the single phase Bi:YIG synthesized at temperature 950 °C for 15 hours is ~ 65 nm. The real content of Bi3+

J. Pigosová; A. Cigán; J. Manka

2008-01-01

391

Tunable magnetostatic waves bandpass filters with scandium doped yttrium iron garnet films  

Microsoft Academic Search

This paper reports results of theoretical and experimental studies of microwave bandpass tuned filters based on magnetostatic surface wave (MSSW) propagation in yttrium iron garnet (YIG) films. Filter transmission and input impedance characteristics for saturation magnetization 139 kAm-1 of YIG films and 32 kAm-1 of scandium-doped YIG films have been calculated and measured experimentally. Structures of a planar, multilayer metal-dielectric-YIG

A. S. Kindyak; V. A. Kolosov; L. N. Makutina

1995-01-01

392

Field Dependence of Anisotropy in Ytterbium-Doped Yttrium Iron Garnet  

Microsoft Academic Search

Torque curves were measured on two single crystals of Yb-doped yttrium iron garnet (containing 5% or 10% Yb) at temperatures from 77° to 4.2°K in applied fields ranging from 2500 to 15 000 Oe. At 20°K the maximum peak height of the (110) torque curve for these crystals was reduced by 12% as the applied field increased from 5000 to

R. F. Pearson; K. Tweedale

1964-01-01

393

Ligand exchange reactions and hydroamination with tris(oxazolinyl)borato yttrium compounds.  

PubMed

Ligand substitution reactions and catalytic hydroamination/cyclization of aminoalkenes have been studied with a new oxazolinylborato yttrium compound, tris(4,4-dimethyl-2-oxazolinyl)phenylborato bis(trimethylsilylmethyl)yttrium ([Y(kappa(3)-To(M))(CH(2)SiMe(3))(2)(THF)], 1). THF exchange in 1 is rapid at room temperature, and activation parameters obtained by simulation of (1)H NMR spectra acquired from 190 to 280 K are consistent with a dissociative mechanism (DeltaS(++) = 30 +/- 1 e.u., DeltaG(++) = 11.9 kcal mol(-1) at 243 K). The related phosphine oxide adduct [Y(kappa(3)-To(M))(CH(2)SiMe(3))(2)(OPPh(3))] (2) also undergoes exchange via OPPh(3) dissociation with a much higher barrier (DeltaG(++) = 15.0 kcal mol(-1) at 320 K). Compound 1 reacts with the amines (t)BuNH(2), para-MeC(6)H(4)NH(2), and 2,6-(i)Pr(2)C(6)H(3)NH(2) to provide six-coordinate [Y(kappa(3)-To(M))(NHR)(2)(THF)] (3: R = (t)Bu; 4: R = para-MeC(6)H(4)) and five-coordinate [Y(kappa(3)-To(M))(NH-2,6-(i)Pr(2)C(6)H(3))(2)] (6). These oxazolinylborato yttrium compounds are precatalysts for the cyclization of aminoalkenes; the kinetics of catalytic conversion indicate zero-order substrate dependence and first-order catalyst dependence. Kinetic investigations of ligand exchange processes and hydroamination reactions indicate that the tris(oxazolinyl)borato-yttrium interaction is robust even in the presence of excess phosphine oxide and primary and secondary amines. PMID:19586044

Pawlikowski, Andrew V; Ellern, Arkady; Sadow, Aaron D

2009-08-17

394

Sputter target  

DOEpatents

The disclosure relates to an improved sputter target for use in the deposition of hard coatings. An exemplary target is given wherein titanium diboride is brazed to a tantalum backing plate using a gold-palladium-nickel braze alloy.

Gates, Willard G. (Kansas City, MO); Hale, Gerald J. (Overland Park, KS)

1980-01-01

395

Off-line studies of the laser ionization of yttrium at the IGISOL facility  

NASA Astrophysics Data System (ADS)

A laser ion source is under development at the IGISOL facility, Jyväskylä, in order to address deficiencies in the ion guide technique. The key elements of interest are those of a refractory nature, whose isotopes and isomers are widely studied using both laser spectroscopic and high precision mass measurement techniques. Yttrium has been the first element of choice for the new laser ion source. In this work, we present a new coupled dye-Ti:Sapphire laser scheme and give a detailed discussion of the results obtained from laser ionization of yttrium atoms produced in an ion guide via resistive heating of a filament. The importance of not only gas purity, but indeed the baseline vacuum pressure in the environment outside the ion guide is discussed in light of the fast gas phase chemistry seen in the yttrium system. A single laser shot model is introduced and is compared to the experimental data in order to extract the level of impurities within the gas cell.

Kessler, T.; Moore, I. D.; Kudryavtsev, Y.; Peräjärvi, K.; Popov, A.; Ronkanen, P.; Sonoda, T.; Tordoff, B.; Wendt, K. D. A.; Äystö, J.

2008-02-01

396

The inhibition of neuronal calcium ion channels by trace levels of yttrium released from carbon nanotubes.  

PubMed

Carbon nanotubes (CNTs) are used with increasing frequency in neuroengineering applications. CNT scaffolds are used to transmit electrical stimulation to cultured neurons and to control outgrowth and branching patterns of neurites. CNTs have been reported to disrupt normal neuronal function including alterations in endocytotic capability and inhibition of ion channels. Calcium ion channels regulate numerous neuronal and cellular functions including endo and exocytosis, neurite outgrowth, and gene expression. Strong CNT interactions with neuronal calcium ion channels would have profound biological implications. Here we show that physiological solutions containing CNTs inhibit neuronal voltage-gated calcium ion channels in a dose-dependent and CNT sample-dependent manner with IC50 as low as 1.2 microg/ml. Importantly, we demonstrate that the inhibitory activity does not involve tubular graphene as previously reported, but rather very low concentrations of soluble yttrium released from the nanotube growth catalyst. Cationic yttrium potently inhibits calcium ion channel function with an inhibitory efficacy, IC50, of 0.07 ppm w/w. Because of this potency, unpurified and even some reportedly "purified" CNT samples contain sufficient bioavailable yttrium to inhibit channel function. Our results have important implications for emerging nano-neurotechnology and highlight the critical role that trace components can play in the biological response to complex nanomaterials. PMID:19698989

Jakubek, Lorin M; Marangoudakis, Spiro; Raingo, Jesica; Liu, Xinyuan; Lipscombe, Diane; Hurt, Robert H

2009-10-01

397

Cold laser machining of nickel-yttrium stabilised zirconia cermets: Composition dependence  

SciTech Connect

Cold laser micromachining efficiency in nickel-yttrium stabilised zirconia cermets was studied as a function of cermet composition. Nickel oxide-yttrium stabilised zirconia ceramic plates obtained via tape casting technique were machined using 8-25 ns pulses of a Nd: YAG laser at the fixed wavelength of 1.064 {mu}m and a frequency of 1 kHz. The morphology of the holes, etched volume, drill diameter, shape and depth were evaluated as a function of the processing parameters such as pulse irradiance and of the initial composition. The laser drilling mechanism was evaluated in terms of laser-material interaction parameters such as beam absorptivity, material spallation and the impact on the overall process discussed. By varying the nickel oxide content of the composite the optical absorption (-value is greatly modified and significantly affected the drilling efficiency of the green state ceramic substrates and the morphology of the holes. Higher depth values and improved drilled volume upto 0.2 mm{sup 3} per pulse were obtained for substrates with higher optical transparency (lower optical absorption value). In addition, a laser beam self-focussing effect is observed for the compositions with less nickel oxide content. Holes with average diameter from 60 {mu}m to 110 {mu}m and upto 1 mm in depth were drilled with a high rate of 40 ms per hole while the final microstructure of the cermet obtained by reduction of the nickel oxide-yttrium stabilised zirconia composites remained unchanged.

Sola, D. [Instituto de Ciencia de Materiales de Aragon, CSIC- Universidad de Zaragoza, C/ Pedro Cerbuna 12, E-50009, Zaragoza (Spain); Gurauskis, J., E-mail: jonas.gurauskis@unizar.es [Instituto de Ciencia de Materiales de Aragon, CSIC- Universidad de Zaragoza, C/ Pedro Cerbuna 12, E-50009, Zaragoza (Spain); Pena, J.I.; Orera, V.M. [Instituto de Ciencia de Materiales de Aragon, CSIC- Universidad de Zaragoza, C/ Pedro Cerbuna 12, E-50009, Zaragoza (Spain)

2009-09-15

398

Time of formation and genesis of yttrium-zirconium mineralization in the Sakharjok massif, Kola Peninsula  

NASA Astrophysics Data System (ADS)

The Kola geotectonic province in the northeastern Fennoscandian Shield accommodates a significant number of alkaline rock massifs differing in age. They are of mantle and mantle-crustal origin (alkali and nepheline syenites, carbonatites) and related to crustal sources (Neoarchean alkali granites). Among them, the Neoarchean Sakharjok nepheline syenite massif is related to the oldest intrusions of this kind bearing yttrium-zirconium mineralization. The crystallization of alkali syenite pertaining to the first intrusive phase of the intrusive Sakharjok massif is dated to 2645 ± 7 Ma, and this implies that this syenite postdated alkali granites (2.66-2.67 Ga). To date the yttrium-zirconium ore, we applied the local U-Pb method to zircon crystals occurring in the mineralized block hosted in nepheline syenite. The earliest fragments of zircon crystallized 1832 ± 7 Ma ago; the age of metamorphism is estimated at 1784 ± 13 Ma. These dates indicate the Paleoproterozoic age of the yttrium-zirconium mineralization, which was formed as a product of fluid reworking of the Neoarchean nepheline syenite of the Sakharjok massif.

Vetrin, V. R.; Skublov, S. G.; Balashov, Yu. A.; Lyalina, L. M.; Rodionov, N. V.

2014-12-01

399

Yttrium-90 microspheres for the treatment of hepatocellular carcinoma: A review  

SciTech Connect

To present a critical review of yttrium-90 (TheraSphere) for the treatment of hepatocellular carcinoma (HCC). Medical literature databases (Medline, Cochrane Library, and CANCERLIT) were searched for available literature concerning the treatment of HCC with TheraSphere. These publications were reviewed for scientific and clinical validity. Studies pertaining to the use of yttrium-90 for HCC date back to the 1960s. The results from the early animal safety studies established a radiation exposure range of 50-100 Gy to be used in human studies. Phase I dose escalation studies followed, which were instrumental in delineating radiation dosimetry and safety parameters in humans. These early studies emphasized the importance of differential arteriolar density between hypervascular HCC and surrounding liver parenchyma. Current trends in research have focused on advancing techniques to safely implement this technology as an alternative to traditional methods of treating unresectable HCC, such as external beam radiotherapy, conformal beam radiotherapy, ethanol ablation, trans-arterial chemoembolization, and radiofrequency ablation. Yttrium-90 (TheraSphere) is an outpatient treatment option for HCC. Current and future research should focus on implementing multicenter phase II and III trials comparing TheraSphere with other therapies for HCC.

Salem, Riad [Radiology, Section of Interventional Radiology, Northwestern Memorial Hospital, Chicago, IL (United States)]. E-mail: r-salem@northwestern.edu; Hunter, Russell D. [MDS Pharma Services, Global Clinical Development, King of Prussia, PA (United States)

2006-10-01

400

Spark plasma sintering of tungsten-yttrium oxide composites from chemically synthesized nanopowders and microstructural characterization  

NASA Astrophysics Data System (ADS)

Nano-crystalline W-1%Y 2O 3 (wt.%) powder was produced by a modified solution chemical reaction of ammonium paratungstate (APT) and yttrium nitrate. The precursor powder was found to consist of particles of bimodal morphology i.e. large APT-like particles up to 20 ?m and rectangular yttrium containing ultrafine plates. After thermal processing tungsten crystals were evolved from W-O-Y plate like particles. spark plasma sintering (SPS) was used to consolidate the powder at 1100 and 1200 °C for different holding times in order to optimize the sintering conditions to yield high density but with reduced grain growth. Dispersion of yttrium oxide enhanced the sinterability of W powder with respect to lanthanum oxide. W-1%Y 2O 3 composites with sub-micron grain size showed improved density and mechanical properties as compared to W-La 2O 3 composites. Sample sintered in two steps showed improved density, due to longer holding time at lower temperature (900 °C) and less grain growth due to shorter holding time at higher temperature i.e. 1 min at 1100 °C.

Yar, M. A.; Wahlberg, Sverker; Bergqvist, Hans; Salem, H. G.; Johnsson, Mats; Muhammed, Mamoun

2011-05-01

401

Targeting adenovirus  

Microsoft Academic Search

The use of targeted viral vectors to localize gene transfer to specific cell types holds many advantages over conventional, non-targeted vectors currently used in gene therapy. The resulting improvements in gene localization from targeted adenovirus vectors are likely to reduce immunogenicity and toxicity, increase safety, and enable the systemic administration of these vectors for multiple indications including cancer, cardiovascular disease,

T J Wickham

2000-01-01

402

A Study on Factors Affecting the Degradation of Magnesium and a Magnesium-Yttrium Alloy for Biomedical Applications  

PubMed Central

Controlling degradation of magnesium or its alloys in physiological saline solutions is essential for their potential applications in clinically viable implants. Rapid degradation of magnesium-based materials reduces the mechanical properties of implants prematurely and severely increases alkalinity of the local environment. Therefore, the objective of this study is to investigate the effects of three interactive factors on magnesium degradation, specifically, the addition of yttrium to form a magnesium-yttrium alloy versus pure magnesium, the metallic versus oxide surfaces, and the presence versus absence of physiological salt ions in the immersion solution. In the immersion solution of phosphate buffered saline (PBS), the magnesium-yttrium alloy with metallic surface degraded the slowest, followed by pure magnesium with metallic or oxide surfaces, and the magnesium-yttrium alloy with oxide surface degraded the fastest. However, in deionized (DI) water, the degradation rate showed a different trend. Specifically, pure magnesium with metallic or oxide surfaces degraded the slowest, followed by the magnesium-yttrium alloy with oxide surface, and the magnesium-yttrium alloy with metallic surface degraded the fastest. Interestingly, only magnesium-yttrium alloy with metallic surface degraded slower in PBS than in DI water, while all the other samples degraded faster in PBS than in DI water. Clearly, the results showed that the alloy composition, presence or absence of surface oxide layer, and presence or absence of physiological salt ions in the immersion solution all influenced the degradation rate and mode. Moreover, these three factors showed statistically significant interactions. This study revealed the complex interrelationships among these factors and their respective contributions to degradation for the first time. The results of this study not only improved our understanding of magnesium degradation in physiological environment, but also presented the key factors to consider in order to satisfy the degradation requirements for next-generation biodegradable implants and devices. PMID:23799028

Johnson, Ian; Liu, Huinan

2013-01-01

403

Adjuvant heparanase inhibitor PI-88 therapy for hepatocellular carcinoma recurrence  

PubMed Central

AIM: To demonstrate that administering heparanase inhibitor PI-88 at 160 mg/d is safe and promising in reducing hepatocellular carcinoma (HCC) recurrence for up to 3 year following curative resection. METHODS: A total of 143 patients (83.1% of the 172 participants in the phase II study) participated in the follow-up study. Of these patients, 50 had received no treatment, 48 had received 160 mg/d PI-88, and 45 had received 250 mg/d PI-88 during the phase II trial. Safety parameters and the following efficacy endpoints were investigated: (1) time to recurrence; (2) disease-free survival; and (3) overall survival. RESULTS: PI-88 at 160 mg/d delayed the onset and frequency of HCC recurrence, and provided a clinically significant survival advantage for up to 3 years after treatment compared with those of the control group: (1) the recurrence-free rate increased from 50% to 63%, and (2) time to recurrence at the 36th percentile was postponed by 78%. The efficacy of administering PI-88 at 250 mg/d was confounded by a high dropout rate (11 out of 54 patients). Additionally, subgroup analyses of patients with (1) multiple tumors or a single tumor ? 2 cm; and (2) hepatitis B or C revealed that administering PI-88 at 160 mg/d conferred the most significant survival advantage (56.8% improvement in disease-free survival, P = 0.045) for patients with both risk factors for recurrence. CONCLUSION: Administering PI-88 at 160 mg/d is a safe and well-tolerated dosage that may confer significant clinical benefits for patients with HCC. PMID:25170226

Liu, Chun-Jen; Chang, Juliana; Lee, Po-Huang; Lin, Deng-Yn; Wu, Cheng-Chung; Jeng, Long-Bin; Lin, Yih-Jyh; Mok, King-Tong; Lee, Wei-Chen; Yeh, Hong-Zen; Ho, Ming-Chih; Yang, Sheng-Shun; Yang, Mei-Due; Yu, Ming-Chin; Hu, Rey-Heng; Peng, Cheng-Yuan; Lai, Kuan-Lang; Chang, Stanley Shi-Chung; Chen, Pei-Jer

2014-01-01

404

Raman spectra and laser properties of Yb-doped yttrium orthovanadate crystals  

NASA Astrophysics Data System (ADS)

Yb-doped yttrium orthovanadate YbxY1-xVO4 (YYV), with x=0.02, crystallizes with a zircon-type structure in the tetragonal system, conforming to the space group I41/amd. The lattice constants are a=0.7122(5) and c=0.6291(3) nm at room temperature. The primitive cell contains four formula units. The Raman spectra and crystallography show no distortion of the VO4 and Y/YbO8 groups. The crystal field is similar to that of the YVO4 crystal and is suitable for the dopant Yb3+ ions. A strong absorption at 975 nm arises from the 2F7/2 to 2F5/2 transition; with a bandwidth of 70 nm it may provide a useful pump band for InGaAs diode lasers. This band is about seven times broader than that of Nd-doped yttrium aluminum garnet and more than three times as broad as that of Nd-doped yttrium orthovanadate. The measured absorption of the YYV is compared to Judd-Ofelt (JO) theory. When applied, the JO theory of parity-forbidden electric-dipole transitions of rare earth ions on noncentrosymmetric sites demonstrates good agreement. The fluorescence spectrum reveals a ground state splitting of ?E=463 cm-1. The fitted fluorescence lifetime is 1.18 ms at the wavelength of 1.0 ?m. The calculated absorption cross section is 1.38×10-20 cm2. The order of magnitude of the emission cross section is estimated as 10-21 cm2. In Yb-doped yttrium aluminum garnet, the fluorescence lifetime is about 1.16-1.30 ms and the absorption cross section is 1.5×10-20 cm2. In Nd-doped yttrium orthovanadate, the fluorescence lifetime is 115 ?s and the emission cross section is 10.7×10-19 cm2. A suitable concentration of the Yb3+ ions doped in the YbxY1-xVO4 crystals should modify the optical and the potential laser properties of the crystals.

Xia, H. R.; Li, L. X.; Zhang, H. J.; Meng, X. L.; Zhu, L.; Yang, Z. H.; Liu, X. S.; Wang, J. Y.

2000-01-01

405

40 CFR 88.311-93 - Emissions standards for Inherently Low-Emission Vehicles.  

Code of Federal Regulations, 2011 CFR

...standards for Inherently Low-Emission Vehicles. 88.311-93 Section 88.311-93...PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES Clean-Fuel Fleet Program § 88...standards for Inherently Low-Emission Vehicles. (a) Certification. (1)...

2011-07-01

406

40 CFR 88.311-93 - Emissions standards for Inherently Low-Emission Vehicles.  

Code of Federal Regulations, 2014 CFR

...standards for Inherently Low-Emission Vehicles. 88.311-93 Section 88.311-93...PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES Clean-Fuel Fleet Program § 88...standards for Inherently Low-Emission Vehicles. (a) Certification. (1)...

2014-07-01

407

40 CFR 88.311-93 - Emissions standards for Inherently Low-Emission Vehicles.  

Code of Federal Regulations, 2013 CFR

...standards for Inherently Low-Emission Vehicles. 88.311-93 Section 88.311-93...PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES Clean-Fuel Fleet Program § 88...standards for Inherently Low-Emission Vehicles. (a) Certification. (1)...

2013-07-01

408

40 CFR 88.313-93 - Incentives for the purchase of Inherently Low-Emission Vehicles.  

Code of Federal Regulations, 2014 CFR

...purchase of Inherently Low-Emission Vehicles. 88.313-93 Section 88.313-93...PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES Clean-Fuel Fleet Program § 88...purchase of Inherently Low-Emission Vehicles. (a) Administration....

2014-07-01

409

40 CFR 88.311-93 - Emissions standards for Inherently Low-Emission Vehicles.  

Code of Federal Regulations, 2012 CFR

...standards for Inherently Low-Emission Vehicles. 88.311-93 Section 88.311-93...PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES Clean-Fuel Fleet Program § 88...standards for Inherently Low-Emission Vehicles. (a) Certification. (1)...

2012-07-01

410

40 CFR 88.313-93 - Incentives for the purchase of Inherently Low-Emission Vehicles.  

Code of Federal Regulations, 2011 CFR

...purchase of Inherently Low-Emission Vehicles. 88.313-93 Section 88.313-93...PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES Clean-Fuel Fleet Program § 88...purchase of Inherently Low-Emission Vehicles. (a) Administration....

2011-07-01

411

40 CFR 88.311-93 - Emissions standards for Inherently Low-Emission Vehicles.  

Code of Federal Regulations, 2010 CFR

...standards for Inherently Low-Emission Vehicles. 88.311-93 Section 88.311-93...PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES Clean-Fuel Fleet Program § 88...standards for Inherently Low-Emission Vehicles. (a) Certification. (1)...

2010-07-01

412

40 CFR 88.313-93 - Incentives for the purchase of Inherently Low-Emission Vehicles.  

Code of Federal Regulations, 2013 CFR

...purchase of Inherently Low-Emission Vehicles. 88.313-93 Section 88.313-93...PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES Clean-Fuel Fleet Program § 88...purchase of Inherently Low-Emission Vehicles. (a) Administration....

2013-07-01

413

40 CFR 88.313-93 - Incentives for the purchase of Inherently Low-Emission Vehicles.  

Code of Federal Regulations, 2010 CFR

...purchase of Inherently Low-Emission Vehicles. 88.313-93 Section 88.313-93...PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES Clean-Fuel Fleet Program § 88...purchase of Inherently Low-Emission Vehicles. (a) Administration....

2010-07-01

414

40 CFR 88.313-93 - Incentives for the purchase of Inherently Low-Emission Vehicles.  

Code of Federal Regulations, 2012 CFR

...purchase of Inherently Low-Emission Vehicles. 88.313-93 Section 88.313-93...PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES Clean-Fuel Fleet Program § 88...purchase of Inherently Low-Emission Vehicles. (a) Administration....

2012-07-01

415

ZC88, a novel 4-amino piperidine analog, inhibits the growth of neuroblastoma cells through blocking hERG potassium channel  

PubMed Central

Many studies have provided convincing evidence for hERG as an important diagnostic and prognostic factor in human cancers, as well as a useful target for antineoplastic therapy. Our previous study also revealed that knockdown of herg gene expression by shRNA interference inhibited the growth of neuroblastoma cells in vitro and in vivo. In the experiment, a novel 4-amino piperidine analog, ZC88, was examined for its effect on hERG potassium channels and its antitumor potency was observed in vitro and in vivo. The results showed that ZC88 could block hERG1 and hERG1b channels expressed in Xenopus oocytes in a concentration-dependent manner. ZC88 displayed significant antiproliferative activity in several tumor cell lines and the tumor cells with higher expression of hERG presented higher sensitivity to ZC88. The mitotic progression of tumor cells was markedly suppressed in the presence of ZC88 through arresting cells in G0/G1 phase. ZC88 significantly inhibited the tumor growth in nude mice at a dosage with slight influence on the cardiac QT interval. The antitumor effect of ZC88 was correlated at least partly with its blockage of hERG channels, which implicated a positive role of hERG potassium channel in tumor cell proliferation. PMID:23917377

Wei, Xiaoli; Sun, Hongliang; Yan, Haitao; Zhang, Cheng; Zhang, Shuzhuo; Liu, Xiaoyan; Hua, Nan; Ma, Xiaoyun; Zheng, Jianquan

2013-01-01

416

ZC88, a novel 4-amino piperidine analog, inhibits the growth of neuroblastoma cells through blocking hERG potassium channel.  

PubMed

Many studies have provided convincing evidence for hERG as an important diagnostic and prognostic factor in human cancers, as well as a useful target for antineoplastic therapy. Our previous study also revealed that knockdown of herg gene expression by shRNA interference inhibited the growth of neuroblastoma cells in vitro and in vivo. In the experiment, a novel 4-amino piperidine analog, ZC88, was examined for its effect on hERG potassium channels and its antitumor potency was observed in vitro and in vivo. The results showed that ZC88 could block hERG1 and hERG1b channels expressed in Xenopus oocytes in a concentration-dependent manner. ZC88 displayed significant antiproliferative activity in several tumor cell lines and the tumor cells with higher expression of hERG presented higher sensitivity to ZC88. The mitotic progression of tumor cells was markedly suppressed in the presence of ZC88 through arresting cells in G?/G? phase. ZC88 significantly inhibited the tumor growth in nude mice at a dosage with slight influence on the cardiac QT interval. The antitumor effect of ZC88 was correlated at least partly with its blockage of hERG channels, which implicated a positive role of hERG potassium channel in tumor cell proliferation. PMID:23917377

Wei, Xiaoli; Sun, Hongliang; Yan, Haitao; Zhang, Cheng; Zhang, Shuzhuo; Liu, Xiaoyan; Hua, Nan; Ma, Xiaoyun; Zheng, Jianquan

2013-05-01

417

Therapeutic Inhibition of Pro-Inflammatory Signaling and Toxicity to Staphylococcal Enterotoxin B by a Synthetic Dimeric BB-Loop Mimetic of MyD88  

PubMed Central

Staphylococcal enterotoxin B (SEB) exposure triggers an exaggerated pro-inflammatory cytokine response that often leads to toxic shock syndrome (TSS) associated with organ failure and death. MyD88 mediates pro-inflammatory cytokine signaling induced by SEB exposure and MyD88?/? mice are resistant to SEB intoxication, suggesting that MyD88 may be a potential target for therapeutic intervention. We targeted the BB loop region of the Toll/IL-1 receptor (TIR) domain of MyD88 to develop small-molecule therapeutics. Here, we report that a synthetic compound (EM-163), mimic to dimeric form of BB-loop of MyD88 attenuated tumor necrosis factor (TNF)- ?, interferon (IFN)-?, interleukin (IL)-1?, IL-2 and IL-6 production in human primary cells, whether administered pre- or post-SEB exposure. Results from a direct binding assay, and from MyD88 co-transfection/co-immunoprecipitation experiments, suggest that EM-163 inhibits TIR-TIR domain interaction. Additional results indicate that EM-163 prevents MyD88 from mediating downstream signaling. In an NF-kB-driven reporter assay of lipopolysaccharide-stimulated MyD88 signaling, EM-163 demonstrated a dose-dependent inhibition of reporter activity as well as TNF-? and IL-1? production. Importantly, administration of EM-163 pre- or post exposure to a lethal dose of SEB abrogated pro-inflammatory cytokine responses and protected mice from toxic shock-induced death. Taken together, our results suggest that EM-163 exhibits a potential for therapeutic use against SEB intoxication. PMID:22848400

Kissner, Teri L.; Ruthel, Gordon; Alam, Shahabuddin; Mann, Enrique; Ajami, Dariush; Rebek, Mitra; Larkin, Eileen; Fernandez, Stefan; Ulrich, Robert G.; Ping, Sun; Waugh, David S.; Rebek, Julius; Saikh, Kamal U.

2012-01-01

418

Novel myeloid differentiation factor 88, EsMyD88, exhibits EsTube-binding activity in Chinese mitten crab Eriocheir sinensis.  

PubMed

Myeloid differentiation factor 88 (MyD88) is a universal and essential adapter protein that participates in the activation of the Toll-like receptor/interleukin-1 receptor-mediated signaling pathway. In the present study, a new MyD88 gene (named EsMyD88) was identified in the Chinese mitten crab Eriocheir sinensis. The cDNA of EsMyD88 was 2210?bp long with a 1416?bp open reading frame that encoded a protein with 472 amino acids. Predicted EsMyD88 protein had a death domain at the N-terminal and a TIR domain at the C-terminal. BLASTP and phylogenetic analysis results showed that EsMyD88 was clustered in one group together with other crustaceans MyD88 (SpMyD88, FcMyD88, LvMyD88, and LvMyD88-1). EsMyD88 was detected in all the examined tissues of healthy crabs, and was mainly expressed in the hemocytes and nerves. When normal crabs were challenged with lipopolysaccharide, peptidoglycan, Staphylococcus aureus, Vibrio parahaemolyticus, or Aeromonas hydrophila, the expression levels of EsMyD88 significantly increased either in the hepatopancreas or hemocytes. Results of the pull-down assay showed that EsMyD88 could bind to downstream cytosolic adaptor EsTube. Overexpression of EsMyD88 protein in Drosophila Schneider 2 cells led to the activation of antimicrobial peptide genes. RNA interference assay showed that EsMyD88 is involved in regulating the transcription of ALF1 and ALF2, Cru1 and Cru2, and Lys in crab challenged with V. parahaemolyticus. All the results mentioned earlier indicated that EsMyD88 gene has a key function in antibacterial innate immune defense. PMID:25150191

Huang, Ying; Chen, Yi-Hong; Wang, Zheng; Wang, Wen; Ren, Qian

2014-12-01

419

[Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted] Domestic Production and Use: Rare earths were mined by one U.S. company in 2013. Bastnasite, a rare-earth  

E-print Network

, yttrium compounds were used in abrasives, bearings and seals, high-temperature refractories for continuous, compounds, and metal e, 3 450 670 550 160 200 Exports, in ore and concentrate NA NA NA NA NA Consumption 660 Yttrium oxide, per kilogram, minimum 99.999 purity 6 13­14 25­27 136­141 86-91 24-28 Yttrium metal

420

[Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted] Domestic Production and Use: Rare earths were mined by one U.S. company in 2012. Bastnasite, a rare-earth  

E-print Network

and concentrates (monazite) 2612.20.0000 Free. Rare-earth metals, scandium and yttrium, whether or not intermixed Production and Use: Rare earths were mined by one U.S. company in 2012. Bastnasite, a rare-earth% Y2O3 2846.90.4000 Free. Other rare-earth compounds, including yttrium oxide >85% Y2O3, yttrium

421

Linear and nonlinear diffraction of dipolar spin waves in yttrium iron garnet films observed by space-and time-resolved Brillouin light scattering  

E-print Network

Linear and nonlinear diffraction of dipolar spin waves in yttrium iron garnet films observed of dipolar spin waves excited by strip-line antennas in tangentially mag- netized garnet films. The technique of the observed phenomena. I. INTRODUCTION Magnetostatic spin waves in yttrium iron garnet YIG films provide

Demokritov, S.O.

422

Use of CAP88 at Department of Energy Sites  

SciTech Connect

The U.S. Department of Energy is committed to protecting the public and environment against undue risk from radiation associated with radiological activities conducted under its control. Some U.S. Department of Energy Site activities result in emissions of radioactive materials to the air. CAP88 codes are used to model these emissions and the subsequent maximum estimated dose to a member of the public in the vicinity of the U.S. Department of Energy Site. This paper reviews the use of the CAP88 code at the variety of U.S. Department of Energy sites that use it for compliance reporting under 40 CFR Part 61, Subpart H.

Snyder, Sandra F.; Vazquez, Gustavo; Hay, Tristan R.

2013-08-16

423

The STS-88 crew and families DEPART for Houston  

NASA Technical Reports Server (NTRS)

STS-88 Commander Robert D. Cabana and his wife, Nancy, enter the airplane that will return them to Houston and the Johnson Space Center. They will be joined by other crew members, with their families, Pilot Frederick W. 'Rick' Sturckow. Mission Specialists Sergei Konstantinovich Krikalev, James H. Newman, Jerry L. Ross and Nancy J. Currie. The STS-88 crew returned Dec. 15 from a 12- day mission on orbit constructing the first elements of the International Space Station, the U.S.-built Unity connecting module and Russian-built Zarya control module.

1998-01-01

424

MyD88-dependent SHIP1 regulates proinflammatory signaling pathways in dendritic cells after monophosphoryl lipid A stimulation of TLR4.  

PubMed

We previously showed that monophosphoryl lipid A (MLA) activates TLR4 in dendritic cells (DCs) in a Toll/IL-1R domain-containing adaptor inducing IFN-? (TRIF)-biased manner: MLA produced from Salmonella minnesota Re595 induced signaling events and expression of gene products that were primarily TRIF dependent, whereas MyD88-dependent signaling was impaired. Moreover, when tested in TRIF-intact/MyD88-deficient DCs, synthetic MLA of the Escherichia coli chemotype (sMLA) showed the same activity as its diphosphoryl, inflammatory counterpart (synthetic diphosphoryl lipid A), indicating that TRIF-mediated signaling is fully induced by sMLA. Unexpectedly, we found that the transcript level of one proinflammatory cytokine was increased in sMLA-treated cells by MyD88 deficiency to the higher level induced by synthetic diphosphoryl lipid A, which suggested MyD88 may paradoxically help restrain proinflammatory signaling by TRIF-biased sMLA. In this article, we demonstrate that sMLA induces MyD88 recruitment to TLR4 and activates the anti-inflammatory lipid phosphatase SHIP1 in an MyD88-dependent manner. At the same time, MyD88-dependent signaling activity at the level of IL-1R-associated kinase 1 is markedly reduced. Increased SHIP1 activity is associated with reductions in sMLA-induced I?B kinase ?/? and IFN regulatory factor 3 activation and with restrained expression of their downstream targets, endothelin-1 and IFN-?, respectively. Results of this study identify a pattern that is desirable in the context of vaccine adjuvant design: TRIF-biased sMLA can stimulate partial MyD88 activity, with MyD88-dependent SHIP1 helping to reduce proinflammatory signaling in DCs. PMID:21339365

Cekic, Caglar; Casella, Carolyn R; Sag, Duygu; Antignano, Frann; Kolb, Joseph; Suttles, Jill; Hughes, Michael R; Krystal, Gerald; Mitchell, Thomas C

2011-04-01

425

Target discovery  

Microsoft Academic Search

Target discovery, which involves the identification and early validation of disease-modifying targets, is an essential first step in the drug discovery pipeline. Indeed, the drive to determine protein function has been stimulated, both in industry and academia, by the completion of the human genome project. In this article, we critically examine the strategies and methodologies used for both the identification

Mark A. Lindsay

2003-01-01

426

88. CEDAR DRAW SPILL, HIGH LINE CANAL, TWIN FALLS COUNTY, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

88. CEDAR DRAW SPILL, HIGH LINE CANAL, TWIN FALLS COUNTY, SOUTH OF FILER, IDAHO; WEST VIEW OF CANAL AND GATES. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

427

RAPID COMMUNICATIONS PHYSICAL REVIEW E 88, 031101(R) (2013)  

E-print Network

, the dust pressure in dusty plasma is mostly of electrostatic origin. DOI: 10.1103/PhysRevE.88.031101 PACS for if electrostatic interactions between the dust particles and the background plasma are taken into account. Thus better fit to the data [14,15]. Hence the second rank pressure tensor of the dust is calculated

Merlino, Robert L.

428

PHYSICAL REVIEW B 88, 024303 (2013) Tunable active acoustic metamaterials  

E-print Network

PHYSICAL REVIEW B 88, 024303 (2013) Tunable active acoustic metamaterials Bogdan-Ioan Popa,* Lucian July 2013) We describe and demonstrate an architecture for active acoustic metamaterials whose types of unit cells that generate metamaterials in which either the effective density or bulk modulus

Cummer, Steven A.

429

RAPID COMMUNICATIONS PHYSICAL REVIEW B 88, 201404(R) (2013)  

E-print Network

apply the concept of quasicrystals to metamaterials and experimentally demonstrate metasurfaces metasurfaces we quantify the impact of symmetry on their properties. This is achieved by studying symmetry in k space, therefore opening a route towards isotropic metasurfaces. DOI: 10.1103/PhysRevB.88

430

Annual Information Digest: Los Angeles Community Colleges, 1987-88.  

ERIC Educational Resources Information Center

This statistical digest provides 1987-88 information on the enrollments, students, programs and services, finances, and personnel resources of the Los Angeles Community College District's (LACCD's) nine campuses. Following a glossary of terms, the report provides an overview of major findings. These include the following: (1) an estimated 4.6…

Los Angeles Community Coll. District, CA. Div. of Educational Planning and Development.

431

88. Photographic copy of retouched photograph (circa 1918, original print ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

88. Photographic copy of retouched photograph (circa 1918, original print in Archives, Public Affairs Department, Sears Merchandise Group, Hoffman Estates, Illinois). Photographer unknown. INTERIOR VIEW OF MERCHANDISE BUILDING, SHIPPING COURT, SECOND FLOOR - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

432

88. EAST SECTION OF SOUTH PLANT FROM CHEMICAL STORAGE TANK, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

88. EAST SECTION OF SOUTH PLANT FROM CHEMICAL STORAGE TANK, SHOWING MUSTARD FILLING BUILDING (BUILDING 728) AT RIGHT FOREGROUND AND ARMY RESERVE CENTER (BUILDING 732) AT CENTER. VIEW TO SOUTHEAST. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

433

88. New York, New Haven & Hartford RR: East New ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

88. New York, New Haven & Hartford RR: East New Haven Shops Roundhouse. East New Haven, New Haven Co., CT. (Not on NEC). - Northeast Railroad Corridor, Amtrak Route between New York/Connecticut & Connecticut/Rhode Island State Lines, New Haven, New Haven County, CT

434

38 CFR 11.88 - Cancellation of note.  

Code of Federal Regulations, 2013 CFR

...Disposition of Notes Secured by Adjusted Certificates Redeemed from Banks by the Department of Veterans Affairs Under Section 502 of the World War Adjusted Compensation Act, As Amended (pub. L. 120, 68th Cong.) § 11.88 Cancellation of note. When a...

2013-07-01

435

38 CFR 11.88 - Cancellation of note.  

Code of Federal Regulations, 2010 CFR

...Disposition of Notes Secured by Adjusted Certificates Redeemed from Banks by the Department of Veterans Affairs Under Section 502 of the World War Adjusted Compensation Act, As Amended (pub. L. 120, 68th Cong.) § 11.88 Cancellation of note. When a...

2010-07-01

436

The Bronson Settlement Review: Year Four, 1987-88.  

ERIC Educational Resources Information Center

School year 1987-88 marked the mid-point of the seven-year desegregation settlement for the Cincinnati (Ohio) Public Schools. This report presents data from a review of progress that was provided for in the Bronson Settlement Agreement, answers plaintiff questions, and addresses district concerns. The following subjects are discussed: (1) progress…

Evans, Robert W.; Nieman, Ronald W.

437

88 2012 desert symposium Earliest delivery of sediment from the  

E-print Network

88 2012 desert symposium Earliest delivery of sediment from the Colorado River to the Salton Trough et al., 2008, 2011). Despite recent advances, age constraints from two locations challenge our California and northwestern Mexico, and location of Split Mountain Gorge (SMG, star) in the western Salton

Dorsey, Becky

438

45 CFR 88.6 - Complaint handling and investigating.  

Code of Federal Regulations, 2010 CFR

45 Public Welfare 1 2010-10-01...Section 88.6 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL...DISCRIMINATORY POLICIES OR PRACTICES ...Office for Civil Rights (OCR) of the...Department of Health and Human Services has...

2010-10-01

439

Overexpression of FOXO3, MYD88, and GAPDH Identified by Suppression Subtractive Hybridization in Esophageal Cancer Is Associated with Autophagy  

PubMed Central

To find genes involved in tumorigenesis and the development of esophageal cancer, the suppression subtractive hybridization (SSH) method was used to identify genes that are overexpressed in esophageal cancer tissues compared to normal esophageal tissues. In our SSH library, the forkhead box O3 (FOXO3), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), and myeloid differentiation primary response 88 (MYD88) genes were the most highly upregulated genes, and they were selected for further studies because of their potential role in the induction of autophagy. Upregulation of these genes was also observed in clinical samples using qRT-PCR. In addition, coexpression analysis of the autophagy-related genes Beclin1, ATG12, Gabarapl, PIK3C3, and LC3 demonstrated a significant correlation between the differentially overexpressed genes and autophagy. Autophagy is an important mechanism in tumorigenesis and the development of chemoresistance in cancer cells. The upregulation of FOXO3, GAPDH, and MYD88 variants in esophageal cancer suggests a role for autophagy and provides new insight into the biology of esophageal cancer. We propose that FOXO3, GAPDH, and MYD88 are novel targets for combating autophagy in esophageal cancer. PMID:24527027

Mottaghi-Dastjerdi, Negar; Setayesh, Neda; Roshandel, Gholamreza; Ebrahimifard, Farzaneh; Sepehrizadeh, Zargham

2014-01-01

440

Structural studies on the yttrium-doped cobalt ferrite powders synthesized by sol-gel combustion method  

NASA Astrophysics Data System (ADS)

Y0.2CoFe1.8O4 nanopowders were prepared using a sol-gel combustion method. Metal nitrates, such as yttrium nitrate, cobalt nitrate and ferric nitrate, were used as the source materials. Citric acid and polyvinyl alcohol were used as the burning agent and agglomeration reducing agent, respectively. The pH of the precursor was maintained at 7. The mean crystallite size of the prepared ferrite was in the range of ?20-70 nm. The inverse spinel structure, cubic morphology, and the identification of functional groups of the yttrium-doped cobalt ferrite were analyzed systematically using several analytical tools.

Shobana, M. K.; Kwon, Hoon; Choe, Heeman

2012-07-01

441

Extraction of yttrium in the system Y(NO 3 ) 3 -HNO 3 -H 2 ODi(2-ethylhexyl) phosphoric acid  

Microsoft Academic Search

The extraction of yttrium from the system YCl3-Di(2-ethylhexyl) phosphoric acid (D2EHPA) has been reported previously.1,2 The extraction equilibrium in the system Y(NO3)3-HNO3-H2O-D2EHPA in Amsco as the solvent was studied as a function of the D2EHPA concentration, acidity and aqueous yttrium concentration,\\u000a and the results were compared to the choride system. The ratio of the distribution ratios for nitrate and chloride

Takeo Harada; Renato G. Bautista; Morton Smutz

1971-01-01

442

Magneto-optical properties of cerium substituted yttrium iron garnet films with reduced thermal budget for monolithic photonic integrated circuits.  

PubMed

Thin films of polycrystalline cerium substituted yttrium iron garnet (CeYIG) were grown on an yttrium iron garnet (YIG) seed layer on Si and Si-on-insulator substrates by pulsed laser deposition, and their optical and magneto-optical properties in the near-IR region were measured. A YIG seed layer of ~30 nm thick processed by rapid thermal anneal at 800°C provided a virtual substrate to promote crystallization of the CeYIG. The effect of the thermal budget of the YIG/CeYIG growth process on the film structure, magnetic and magnetooptical properties was determined. PMID:23263087

Goto, Taichi; Onba?l?, Mehmet C; Ross, C A

2012-12-17

443

Magneto-optical Kerr effects of yttrium-iron garnet thin films incorporating gold nanoparticles.  

PubMed

We report an experimental study on magneto-optical (MO) Kerr effects of yttrium-iron garnet (YIG) thin films incorporating Au nanoparticles. The polar MO Kerr spectra in the wavelength between 400 and 800 nm show that, by incorporating the Au nanoparticles, Kerr rotation angles become negative values in the region, where the localized surface plasmon polariton (SPP) resonance of the Au nanoparticles is located. The anomalous Kerr rotation indicates a possible coupling between the MO Kerr effect of YIG and the SPP. A mechanism for the coupling is discussed. PMID:16712274

Tomita, Satoshi; Kato, Takeshi; Tsunashima, Shigeru; Iwata, Satoshi; Fujii, Minoru; Hayashi, Shinji

2006-04-28

444

A nonreciprocal racetrack resonator based on vacuum-annealed magnetooptical cerium-substituted yttrium iron garnet.  

PubMed

Vacuum annealed polycrystalline cerium substituted yttrium iron garnet (CeYIG) films deposited by radio frequency magnetron sputtering on non-garnet substrates were used in nonreciprocal racetrack resonators. CeYIG annealed at 800°C for 30 min provided a large Faraday rotation angle, close to the single crystal value. Crystallinity, magnetic properties, refractive indices and absorption coefficients were measured. The resonant transmission peak of the racetrack resonator covered with CeYIG was non-reciprocally shifted by applying an in-plane magnetic field. PMID:25320991

Goto, Taichi; Onbasli, Mehmet C; Kim, Dong Hun; Singh, Vivek; Inoue, M; Kimerling, Lionel C; Ross, C A

2014-08-11

445

Stability of Bose-Einstein condensates of hot magnons in yttrium iron garnet films.  

PubMed

We investigate the stability of the recently discovered room-temperature Bose-Einstein condensate (BEC) of magnons in yttrium iron garnet films. We show that magnon-magnon interactions depend strongly on the external field orientation, and that the BEC in current experiments is actually metastable-it only survives because of finite-size effects, and because the BEC density is very low. On the other hand a strong field applied perpendicular to the sample plane leads to a repulsive magnon-magnon interaction; we predict that a high-density room-temperature magnon BEC should then form in this perpendicular field geometry. PMID:18643698

Tupitsyn, I S; Stamp, P C E; Burin, A L

2008-06-27

446

Functional dependence and quasiperiodicity in the spatiotemporal dynamics of yttrium iron garnet films.  

PubMed

When thin films of yttrium iron garnet (YIG) are placed in a magnetic field and driven at microwave (rf) frequencies, nonlinear interactions within the material cause the normal microwave spin precession to be modulated at lower frequencies. We measure these lower frequency (kHz) signals at two spatially separated locations on the YIG film and use linear and nonlinear analysis to study the functional dependence of the spin dynamics at one location on the spin dynamics at the other location. We see dynamical states where nonlinear analysis can detect a functional dependence that the linear analysis fails to reveal. PMID:11461370

Goodridge, C L; Rachford, F J; Pecora, L M; Carroll, T L

2001-07-01

447

Study of Defects That Trap Excitons in Yttrium Aluminum Garnets Doped With Rare-Earth Elements  

NASA Astrophysics Data System (ADS)

Excitons play a fundamental role in transporting energy in photonic materials. Understanding and controlling excitons dynamics through their interactions with activating impurities and lattice defects is key to improving scintillation and optical properties. Singles crystals of yttrium aluminum garnet (YAG) crystals doped with rare-earths were studied by positron annihilation, thermolunuinescence and optical spectroscopy. Evidence of defect complexes was found in the YAG structure. Positron lifetime measurements were performed to characterize those defects. Effects of dopants on the optical properties and lattice defects were investigated.

Selim, Farida; Varnery, Chris; Collins, Gary; McKay, David; Reda, Sherif

2011-03-01

448

Diode-pumped passively mode-locked Yb3+-doped yttrium lanthanum oxide ceramic laser  

NASA Astrophysics Data System (ADS)

A diode-pumped picosecond laser was demonstrated with Yb3+-doped yttrium lanthanum oxide transparent laser ceramic Yb:(Y1-xLax)2O3 (x = 0.1), which was fabricated with nanopowders and sintered in H2 atmosphere. Passive mode-locking was realized for the first time to our knowledge with a semiconductor saturable absorber mirror, generating pulses of 174 ps at the central wavelength 1032.5 nm with the average output power 162 mW under a diode-laser pump power of 3.2 W.

Li, W.; Hao, Q.; Yang, Q.; Zeng, H.

2009-08-01

449

Spectral properties of Ce3+ doped yttrium lanthanum oxide transparent ceramics  

NASA Astrophysics Data System (ADS)

Ce3+-doped yttrium lanthanum oxide (Y0.9La0.1)2O3 transparent ceramics is fabricated with nanopowders and sintered in H2 atmosphere. The spectral properties of Ce:(Y0.9La0.1)2O3 transparent ceramics are investigated. There appear two characteristic absorption peaks of Ce3+ ions at 230 nm and 400 nm, separately. It is found that Ce3+ ions can efficiently produce emission at 384 nm from (Y0.9La0.1)2O3 transparent ceramic host, while the emission is completely quenched in Re2O3 (Re = Y, Lu, La) host materials.

Yang, Qiu-Hong; Zhou, Hong-Xu; Lu, Shen-Zhou

2010-02-01

450

The effect of yttrium and thorium on the oxidation behavior of Ni-Cr-Al alloys  

NASA Technical Reports Server (NTRS)

The investigation reported included a determination of the optimum composition of a Ni-Cr-Al ternary alloy with respect to oxidation resistance and minimum film-spalling tendencies. Yttrium and thorium in small amounts were added to the ternary alloy and an investigation of the oxidation mechanism and the oxide scale adherence was conducted. It was found that the oxidation mechanism of Ni-Cr-Al ternary alloys depends upon the composition of the alloy as well as the time, oxygen pressure, and temperature of oxidation.

Kumar, A.; Douglass, D. L.; Nasrallah, M.

1974-01-01

451

HRTEM Study of yttrium oxide particles in ODS steels for fusion reactor application  

Microsoft Academic Search

An oxide dispersion strengthened ferritic-martensitic steel with yttrium oxide (Y2O3) was produced by mechanical alloying and hot isostatic pressing techniques for high-performance structures of fusion energy devices. The structure of the nanometer-sized Y2O3 particles analysed by HRTEM shows a strong correlation of its crystallographic orientation with the alloy lattice. The orientation correlations [110]YO?[111]FeCr and (11?1?)YO?(11?0)FeCr were found. The strong orientation

M. Klimiankou; R. Lindau; A. Möslang

2003-01-01

452

Improvement of the yttrium iron garnet/platinum interface for spin pumping-based applications  

NASA Astrophysics Data System (ADS)

The dependence of the spin pumping efficiency and the spin mixing conductance on the surface processing of yttrium iron garnet (YIG) before the platinum (Pt) deposition has been investigated quantitatively. The ferromagnetic resonance driven spin pumping injects a spin polarized current into the Pt layer, which is transformed into an electromotive force by the inverse spin Hall effect. Our experiments show that the spin pumping effect indeed strongly depends on the YIG/Pt interface condition. We measure an enhancement of the inverse spin Hall voltage and the spin mixing conductance by more than two orders of magnitude with improved sample preparation.

Jungfleisch, M. B.; Lauer, V.; Neb, R.; Chumak, A. V.; Hillebrands, B.

2013-07-01

453

Magnetic and high frequency properties of nanogranular CoFe-yttrium-doped zirconia films  

NASA Astrophysics Data System (ADS)

Soft magnetic nanogranular FeCo-Yttrium-doped Zirconia thin films were fabricated using RF magnetron sputtering at different sputtering power. It was found that film electrical resistivity (?) decreased steeply with the increase of sputtering power, while both saturation magnetization (4?Ms) and natural ferromagnetic resonant frequency (ƒr) increased with the sputtering power ascending from 100 W to 200 W, but decreased when sputtering power exceeded 200 W. X-ray diffraction analysis and transmission electron microscopy confirmed that the films were nanocrystalline/amorphous composites. A saturation magnetization as high as 15.4 kGs and a ferromagnetic resonance frequency above 3 GHz were obtained.

Hao, Guijie; Zhang, Dainan; Tang, Xiaoli; Zhang, Huaiwu

2014-05-01

454

Erbium-doped yttrium aluminium garnet ablative laser treatment for endogenous ochronosis.  

PubMed

Ochronosis is a rare disease characterised clinically by bluish-grey skin discolouration and histologically by yellow-brown pigment deposits in the dermis. It occurs in endogenous and exogenous forms. Endogenous ochronosis, also known as alkaptonuria, is an autosomal recessive disease of tyrosine metabolism, resulting in the accumulation and deposition of homogentisic acid in connective tissue. We report a case of facial endogenous ochronosis and coexistent photodamage, which was successfully treated with erbium-doped yttrium aluminium garnet laser resurfacing and deep focal point treatment to remove areas of residual deep pigment. PMID:25302636

Chaptini, Cassandra; Huilgol, Shyamala C

2014-10-10

455

Synthesis and characterization of amorphous yttrium oxide layers by metal organic chemical solution deposition  

NASA Astrophysics Data System (ADS)

The Solution Deposition Planarization method was successfully used for smoothing Ni-alloy tapes with initial surface roughness of 26.7 nm (on 40×40 ?m2 area) and 12.6 nm (on 5×5 ?m2 area). New precursor solutions were prepared from yttrium acetate and diethylenetriamine or ethylenediamine in MeOH and i-PrOH-alcohols with different viscosities. Using those solutions yttria films with the residual roughness Sa=0.4 nm (on 5×5 ?m2 area) and Sa=7.6 nm (on 40×40 ?m2 area) were deposited on the Ni-alloy tapes.

Martynova, I.; Tsymbarenko, D.; Kamenev, A.; Kuzmina, N.; Kaul, A.

2014-02-01

456

Spectroscopic parameters for certain band systems of astrophysically important molecule: Yttrium oxide  

NASA Astrophysics Data System (ADS)

The Franck-Condon (FC) factors and r-centroids are defined through elementary integrals that involve vibrational wave functions on which they depend in a sensitive manner. The FC factors and r-centroids have been evaluated by a reliable numerical integration procedure on the basis of RKR potential energy model, for the A2?3/2 - X2?+, A2?1/2 - X2?+ and B2?+ - X2?+ band systems of the astrophysically important yttrium oxide molecule. RKR and Morse potential values have been generated for all the four electronic states of YO molecule. All of these three systems of YO show significant rotational independence.

Sriramachandran, P.; Shanmugavel, R.

2011-02-01

457

Enhanced UV and suppressed defect related emission in yttrium doped zinc oxide  

SciTech Connect

Yttrium doped ZnO (YZO) synthesized through conventional solid state reaction method using ZnO and Y{sub 2}O{sub 3} as starting material. The formation of YZO compounds were confirmed by X-ray diffraction and Raman spectroscopy. Photoluminescence measurements revealed an enhanced ultra-violet (UV) and suppressed defect related emission in YZO which is due to reduction in the concentration of the defects related to oxygen interstitials (O{sub i}) and zinc vacancy (V{sub Zn}) of ZnO.

Sharma, Vikas; Vyas, Rishi; Sachdev, K. [Department of Physics, Malaviya National Institute of Technology, Jaipur - 302017 (India); Kumar, Parmod, E-mail: parmodphysics@gmail.com; Malik, Hitendra K. [Department of Physics, Indian Institute of Technology Delhi, New Delhi - 110016 (India); Rana, Geeta [Department of Physics, G. B. Pant University of Agriculture and Technology, Pantnagar - 263145 (India); Asokan, K. [Material Science Division, Inter University Accelerator Centre, New Delhi - 110067 (India)

2014-04-24

458

Yttrium-90-EDTMP: a radiotherapeutic agent in the treatment of leukaemias.  

PubMed Central

Yttrium-90 chelated by the tetraphosphonate EDTMP achieved a high uptake in bone and a rapid clearance from all soft tissues compared with 90Y nitrilotriacetate, citrate and acetate. The biological half-life of 90Y in the bone was greater than 72 h, but the quantity, and therefore dose, could be reduced by 50% using repeated, non-toxic chelation therapy with the calcium salt of DTPA. This treatment should be able to supplement current treatments for leukaemia where the dose of external beam radiation is associated with considerable morbidity. PMID:2803919

Keeling, A. A.; Vaughan, A. T.; Beaney, R. P.

1989-01-01

459

Process for the separation and purification of yttrium-90 for medical applications  

DOEpatents

An extraction chromatographic method for the preparation of [sup 90]Y of high chemical and radiochemical purity is disclosed. After an initial purification of a [sup 90]Sr stock solution and a suitable period of [sup 90]Y ingrowth, the solution is passed through a series of strontium-selective chromatographic columns, each of which lowers the [sup 90]Sr content of the mixture by a factor of about 10[sup 3]. The [sup 90]Y remaining is freed from any residual [sup 90]Sr, from its [sup 90]Zr daughter, and from any remaining impurities by passing the sample through a final column designed to selectively retain yttrium. 5 figures.

Horwitz, P.E.; Dietz, M.L.

1994-11-29

460

Fluorine contamination in yttrium-doped barium zirconate film deposited by atomic layer deposition  

SciTech Connect

The authors have investigated the change of chemical composition, crystallinity, and ionic conductivity in fluorine contaminated yttrium-doped barium zirconate (BYZ) fabricated by atomic layer deposition (ALD). It has been identified that fluorine contamination can significantly affect the conductivity of the ALD BYZ. The authors have also successfully established the relationship between process temperature and contamination and the source of fluorine contamination, which was the perfluoroelastomer O-ring used for vacuum sealing. The total removal of fluorine contamination was achieved by using all-metal sealed chamber instead of O-ring seals.

An Jihwan; Beom Kim, Young; Sun Park, Joong; Hyung Shim, Joon; Guer, Turgut M.; Prinz, Fritz B. [Stanford University, Department of Mechanical Engineering, 440 Escondido Mall, Bldg. 530, Rm. 226, Stanford, California 94305 (United States); Stanford University, Department of Mechanical Engineering, 440 Escondido Mall, Bldg. 530, Rm. 226, Stanford, California 94305 (United States) and Korea University, Department of Mechanical Engineering, Seoul 136-701 (Korea, Republic of); Stanford University, Department of Materials Science and Engineering, 440 Escondido Mall, Bldg. 530, Rm. 226, Stanford, California 94305 (United States); Stanford University, Department of Mechanical Engineering and Department of Materials Science and Engineering, 440 Escondido Mall, Bldg. 530, Rm. 226, Stanford, California 94305 (United States)

2012-01-15

461

Magnetic and high frequency properties of nanogranular CoFe-yttrium-doped zirconia films  

SciTech Connect

Soft magnetic nanogranular FeCo-Yttrium-doped Zirconia thin films were fabricated using RF magnetron sputtering at different sputtering power. It was found that film electrical resistivity (?) decreased steeply with the increase of sputtering power, while both saturation magnetization (4?M{sub s}) and natural ferromagnetic resonant frequency (ƒ{sub r}) increased with the sputtering power ascending from 100?W to 200?W, but decreased when sputtering power exceeded 200?W. X-ray diffraction analysis and transmission electron microscopy confirmed that the films were nanocrystalline/amorphous composites. A saturation magnetization as high as 15.4 kGs and a ferromagnetic resonance frequency above 3?GHz were obtained.

Hao, Guijie, E-mail: linnanzheyu@126.com; Tang, Xiaoli; Zhang, Huaiwu [State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology, Chengdu 610054 (China); Zhang, Dainan [Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716 (United States)

2014-05-07

462

Parametric amplification of surface acoustic wave of ZnO-Ga-doped yttrium iron garnet  

NASA Astrophysics Data System (ADS)

Interactions of surface acoustic wave (SAW) with magnetization are investigated on a ZnO-Ga-doped yttrium iron garnet (YIG) and GGG structure. The attenuation of SAW depends on the input power of SAW due to a nonlinear interaction with the magnetization of the YIG. Parametric amplification of SAW is closely related to the magnetic field strength and the input power. The amplification gain is 5.1 dB at 180 MHz, the magnetic field strength is 9 Oe, and the input power is -5 dBm.

Inaba, R.; Mikoshiba, N.

1982-07-01

463

Spin-wave excitation and propagation in microstructured waveguides of yttrium iron garnet/Pt bilayers  

SciTech Connect

We present an experimental study of spin-wave excitation and propagation in microstructured waveguides consisting of a 100?nm thick yttrium iron garnet/platinum (Pt) bilayer. The life time of the spin waves is found to be more than an order of magnitude higher than in comparably sized metallic structures, despite the fact that the Pt capping enhances the Gilbert damping. Utilizing microfocus Brillouin light scattering spectroscopy, we reveal the spin-wave mode structure for different excitation frequencies. An exponential spin-wave amplitude decay length of 31??m is observed which is a significant step towards low damping, insulator based micro-magnonics.

Pirro, P.; Chumak, A. V.; Lägel, B.; Leven, B.; Hillebrands, B. [Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, D-67663 Kaiserslautern (Germany)] [Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, D-67663 Kaiserslautern (Germany); Brächer, T. [Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, D-67663 Kaiserslautern (Germany) [Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, D-67663 Kaiserslautern (Germany); Graduate School Materials Science in Mainz, Gottlieb-Daimler-Strasse 47, D-67663 Kaiserslautern (Germany); Dubs, C.; Surzhenko, O.; Görnert, P. [Innovent e.V., Prüssingstraße 27B, 07745 Jena (Germany)] [Innovent e.V., Prüssingstraße 27B, 07745 Jena (Germany)

2014-01-06

464

Unidirectional anisotropy in the spin pumping voltage in yttrium iron garnet/platinum bilayers  

SciTech Connect

Detailed measurements of the dc voltage generated in a thin Pt layer deposited on films of yttrium iron garnet (YIG) have been carried out to study the spin pumping effect produced by magnetostatic (MS) modes excited by a microwave field. In relatively thick YIG films the modes are far apart so that one can identify clearly the spin pumping voltage in V{sub SP} produced by each MS mode. We have discovered that when the sputter deposition of the thin Pt layer is made on the YIG film magnetized by a static magnetic field, V{sub SP} exhibits a strong unidirectional anisotropy.

Vilela-Leao, L. H.; Salvador, C.; Azevedo, A.; Rezende, S. M.

2011-09-05

465

Optical fiber-based gamma-ray spectroscopy with cerium-doped lutetium yttrium orthosilicate crystal  

NASA Astrophysics Data System (ADS)

A fiber-optic radiation sensor (FORS), which is composed of an inorganic scintillator, a plastic optical fiber (POF), a photomultiplier tube (PMT), and a multichannel analyzer (MCA), was developed for gamma-ray energy spectroscopy. In this study, we selected a cerium-doped lutetium yttrium orthosilicate (LYSO:Ce) as the sensitive element of the FORS and found that LYSO:Ce with dimensions of 3 × 3 × 15mm3 gives the best performance in obtaining a gammaray energy spectrum. The FORS allows us to measure the energy spectra of Co-60, Na-22, and Cs-137.

Han, Ki-Tek; Yoo, Wook Jae; Seo, Jeong Ki; Shin, Sang Hun; Jeon, Dayeong; Hong, Seunghan; Cho, Seunghyun; Moon, Joo Hyun; Lee, Bongsoo

2013-03-01

466

High temperature superconducting properties: Yttrium barium copper oxides. (Latest citations from the Aerospace database). Published Search  

SciTech Connect

The bibliography contains citations concerning experimental and theoretical studies of high temperature superconducting properties of yttrium barium copper oxides (Y-Ba-Cu-O). Physical properties of superconducting materials and devices are discussed, including electrical, magnetic, structural, electronic, thermal, transport, optical, and elastic properties. Topics include Y-Ba-Cu-O ceramics, critical current density, critical current anisotropy, crystal structures, crystal growth, effects of dopants, crystal defects, structural phase transformation, oxygen stoichiometry, thermal degradation, and stability of Y-Ba-Cu-O materials in various environments. Citations concerning superconducting Y-Ba-Cu-O films are examined in a separate bibliography. (Contains 250 citations and includes a subject term index and title list.)

Not Available

1993-10-01

467

Properties of Ce-substituted yttrium iron garnet film containing indium prepared by RF-sputtering  

NASA Astrophysics Data System (ADS)

We studied the magneto-optical and magnetic properties of Ce-substituted yttrium iron garnet film containing indium. The magnetic anisotropy energy K(sub u) was estimated at -1.58 x 10(exp 4) erg/cu cm in the in-plane direction using ferromagnetic resonance. The lambda(sub 110) value is measured to be 1.56 x 10(exp -6) which is much smaller than that estimated from other reported values. It appears that the measured K(sub u) can not be explained only in terms of the stress-induced magnetic anisotropy.

Mino, Shinji; Tate, Akiyuki; Uno, Takehiko; Shintaku, Toshihiro; Shibukawa, Atsushi

1993-07-01

468

Characterization of as-deposited and sintered yttrium iron garnet thick films formed by aerosol deposition  

NASA Astrophysics Data System (ADS)

We have employed the aerosol deposition method (ADM) to direct-write 39-µm-thick polycrystalline films of yttrium iron garnet at room temperature onto sapphire at a rate of 1-3 µm/min as a first step toward integration into microwave magnetic circuits. The resulting randomly oriented polycrystalline films are composed of fractured compact nanosized crystallites. Upon postdeposition sintering at 1280 °C the density and magnetic properties become closer to those of the bulk. These results suggest that the ADM shows promise for depositing very thick films at high deposition rates to produce structurally and magnetically uniform films that retain the structural properties of the starting powder.

Johnson, Scooter D.; Glaser, Evan R.; Cheng, Shu-Fan; Kub, Fritz J.; Eddy, Charles R., Jr.

2014-03-01

469

Electromagnetic excitation of ultrasonic oscillations by yttrium iron garnet films on gallium gadolinium garnet substrates  

NASA Astrophysics Data System (ADS)

We have studied the phenomenon of contactless excitation of ultrasonic oscillations by thin yttrium iron garnet (YIG) films on gallium gadolinium garnet (GGG) substrates upon application of the superposition of a constant magnetic bias field and alternating magnetic field. Dimensional resonance effects that cannot be explained in the framework of existing theoretical notions have been discovered, in particular, in dependences of the amplitude of excited longitudinal oscillations on the YIG film thickness, frequency of ultrasound, and degree of homogeneity and strength of the magnetic bias field. It is suggested that the observed phenomenon is caused by resonant participation of the intrinsic oscillations of domain walls in the excitation of ultrasound.

Sarnatskii, V. M.; Mavlonazarov, I. O.; Lutsev, L. V.

2014-07-01

470

Induced magneto-transport properties at palladium/yttrium iron garnet interface  

NASA Astrophysics Data System (ADS)

As a thin layer of palladium (Pd) is directly deposited on an yttrium iron garnet or YIG (Y3Fe5O12) magnetic insulator film, Pd develops both low- and high-field magneto-transport effects that are absent in standalone Pd or thick Pd on YIG. While the low-field magnetoresistance peak of Pd tracks the coercive field of the YIG film, the much larger high-field magnetoresistance and the Hall effect do not show any obvious relationship with the bulk YIG magnetization. The distinct high-field magneto-transport effects in Pd are shown to be caused by interfacial local moments in Pd.

Lin, Tao; Tang, Chi; Shi, Jing

2013-09-01

471

Photoinduced magnetic effects in bulk single-crystalline, polycrystalline, and LPE films of Yttrium Iron Garnet  

NASA Astrophysics Data System (ADS)

The effect of light on magnetic initial permeability (the so-called photomagnetic effect) and photoinduced disaccommodation were studied in samples of yttrium iron garnet over the temperature range 77-300 K. The samples studied were bulk crystalline, produced by the floating zone method and the flux method, polycrystalline, produced by the usual sintering method, and single-crystalline films, produced by in situ liquid-phase epitaxis. One or both of the studied phenomena were observed in our experimental samples. To explain the experimental results, we suggest there is photoinduced structural distortion around oxygen vacancies due to a photoinduced change of charge imbalance.

Hisatake, K.; Matsubara, I.; Maeda, K.; Fujiwara, T.; Peters, M.; Abe, S.; Kudo, K.; Kainuma, S.; Tamaki, T.; Kino, Y.; de Francisco, C.; Munoz, J. M.; Alejos, O.; Hernandez, P.; Torres, C.; Shinagawa, K.

2002-05-01

472

Magnetic anisotropy and magnetic anneal in silicon-doped yttrium iron garnet  

Microsoft Academic Search

Measurements are reported on the resonance field and linewidth of ferromagnetic resonance for specimens of silicon-doped yttrium iron garnet with composition Y3Fe5-xSixO12 where x=0.006, 0.020, 0.034 and 0.08. The temperature range covered is 2K to 300 K; the measurement frequencies are 9.415 GHz and 30.05 GHz. Magnetic anneal effects are studied at low temperatures. It is concluded that valence exchange

R. W. Teale; D. W. Temple; D. I. Weatherley

1970-01-01

473

ARTICLES: Active mode locking in an yttrium erbium aluminum garnet crystal laser (? = 2.94?)  

NASA Astrophysics Data System (ADS)

A constant-temperature yttrium erbium aluminum garnet crystal laser was actively mode locked by resonant modulation of the resonator losses using a lithium niobate electrooptic modulator with Brewster faces without any polarizers. This gave a modulation depth 2.6 times greater than that for a modulator with an ideal polarizer. A spike energy of ~1 mJ was obtained with an estimated duration of 200 psec in the 1.7 mm diameter TEM00 mode. The laser radiation was elliptically polarized. It was found that three-micron radiation could be recorded using an SNF-T photomultiplier.

Vodop'yanov, K. L.; Kulevski?, L. A.; Malyutin, A. A.; Pashinin, Pavel P.; Prokhorov, A. M.

1982-05-01

474

Myeloid Differentiation Factor 88–Dependent Signaling Is Critical for Acute Organic Dust–Induced Airway Inflammation in Mice  

PubMed Central

Organic dust exposure within agricultural environments results in airway diseases. Toll-like receptor 2 (TLR2) and TLR4 only partly account for the innate response to these complex dust exposures. To determine the central pathway in mediating complex organic dust–induced airway inflammation, this study targeted the common adaptor protein, myeloid differentiation factor 88 (MyD88), and investigated the relative contributions of receptors upstream from this adaptor. Wild-type, MyD88, TLR9, TLR4, IL-1 receptor I (RI), and IL-18R knockout (KO) mice were challenged intranasally with organic dust extract (ODE) or saline, according to an established protocol. Airway hyperresponsiveness (AHR) was assessed by invasive pulmonary measurements. Bronchoalveolar lavage fluid was collected to quantitate leukocyte influx and cytokine/chemokine (TNF-?, IL-6, chemokine [C-X-C motif] ligands [CXCL1 and CXCL2]) concentrations. Lung tissue was collected for histopathology. Lung cell apoptosis was determined by a terminal deoxynucleotidyl transferase dUTP nick-end labeling assay, and lymphocyte influx and intercellular adhesion molecule–1 (ICAM-1) expression were assessed by immunohistochemistry. ODE-induced AHR was significantly attenuated in MyD88 KO mice, and neutrophil influx and cytokine/chemokine production were nearly absent in MyD88 KO animals after ODE challenges. Despite a near-absent airspace inflammatory response, lung parenchymal inflammation was increased in MyD88 KO mice after repeated ODE exposures. ODE-induced epithelial-cell ICAM-1 expression was diminished in MyD88 KO mice. No difference was evident in the small degree of ODE-induced lung-cell apoptosis. Mice deficient in TLR9, TLR4, and IL-18R, but not IL-1IR, demonstrated partial protection against ODE-induced neutrophil influx and cytokine/chemokine production. Collectively, the acute organic dust–induced airway inflammatory response is highly dependent on MyD88 signaling, and is dictated, in part, by important contributions from upstream TLRs and IL-18R. PMID:23492189

Bauer, Christopher; Kielian, Tammy; Wyatt, Todd A.; Romberger, Debra J.; West, William W.; Gleason, Angela M.

2013-01-01

475

Using Vendor Inquiry in PeopleSoft 8.8 1 Using Vendor Inquiry in PeopleSoft 8.8  

E-print Network

Using Vendor Inquiry in PeopleSoft 8.8 1 Using Vendor Inquiry in PeopleSoft 8.8 PeopleSoft 8 Novell user ID and password and click the Sign In button. #12;Using Vendor Inquiry in PeopleSoft 8.8 2 border of your window you will see your user Id. #12;Using Vendor Inquiry in PeopleSoft 8.8 3 In the menu

Barrash, Warren

476

Radioembolization of liver tumors with yttrium-90 microspheres.  

PubMed

Radioembolization (RE), also termed selective internal radiation therapy (SIRT), has been gradually introduced to the clinical arsenal of cytoreductive modalities in recent years. There is growing evidence for efficiency in liver tumors of various entities, with the most prominent ones being hepatocellular carcinoma, colorectal cancer, and neuroendocrine tumors. Hepatic metastases of numerous other tumor entities including breast cancer, cholangiocarcinoma, and pancreatic cancer are treatment-sensitive, even when being refractory to other treatment modalities such as bland-embolization, regional, or systemic chemotherapy. The antitumor effect of SIRT is related to radiation rather than embolization, with extraordinary high local radiation doses obtained selectively at the site of viable tumor and little affection of the surrounding normal liver tissue. Morphologic changes after RE may pose difficulties for interpretation in conventional restaging with regard to tumor viability and true response to treatment. Therefore, functional imaging, that is, metabolic imaging with (18)F fluorodeoxyglucose positron emission tomography (computed tomography) in the majority of treated tumors, is regarded the gold standard in this respect and should be included for pre- and post-SIRT assessment. To prevent serious toxicity to be associated with the potent antitumor efficacy, meticulous pretreatment evaluation is of particular importance. Improvements in predicting dosimetry will help optimize treatment and patient selection. Nuclear medicine procedures are essential for planning, performing, and monitoring of RE. However, the interdisciplinary aspect of patient management has to be emphasized for this particular treatment form. As SIRT is moving forward from the salvage setting indication to the use in earlier stages of hepatic tumor disease and with the advent of new treatment protocols and targeted therapies, embedding SIRT into a multidisciplinary approach will become even more important. This article focuses on procedural and technical aspects for selection, preparation, and performance of treatment as well as post-therapeutic monitoring and response assessment. PMID:20113679

Ahmadzadehfar, Hojjat; Biersack, Hans-Jürgen; Ezziddin, Samer

2010-03-01

477

Toll-Like Receptors and Cancer: MYD88 Mutation and Inflammation  

PubMed Central

Pattern recognition receptors (PRRs) expressed on immune cells are crucial for the early detection of invading pathogens, in initiating early innate immune response and in orchestrating the adaptive immune response. PRRs are activated by specific pathogen-associated molecular patterns that are present in pathogenic microbes or nucleic acids of viruses or bacteria. However, inappropriate activation of these PRRs, such as the Toll-like receptors (TLRs), due to genetic lesions or chronic inflammation has been demonstrated to be a major cause of many hematological malignancies. Gain-of-function mutations in the TLR adaptor protein MYD88 found in 39% of the activated B cell type of diffuse large B cell lymphomas and almost 100% of Waldenström’s macroglobulinemia further highlight the involvement of TLRs in these malignancies. MYD88 mutations result in the chronic activation of TLR signaling pathways, thus the constitutive activation of the transcription factor NF?B to promote cell survival and proliferation. These recent insights into TLR pathway driven malignancies warrant the need for a better understanding of TLRs in cancers and the development of novel anti-cancer therapies targeting TLRs. This review focuses on TLR function and signaling in normal or inflammatory conditions, and how mutations can hijack the TLR signaling pathways to give rise to cancer. Finally, we discuss how potential therapeutic agents could be used to restore normal responses to TLRs and have long lasting anti-tumor effects. PMID:25132836

Wang, James Q.; Jeelall, Yogesh S.; Ferguson, Laura L.; Horikawa, Keisuke

2014-01-01

478

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2007. All  

E-print Network

metal and compounds used in the United States were imported. Principal uses were in phosphors for color-resistant and corrosion- resistant cutting tools, seals and bearings, high-temperature refractories for continuous for consumption: In monazite -- -- -- -- -- Yttrium, alloys, compounds, and metale, 2 380 619 582 742 650 Exports

479

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2010. All  

E-print Network

metal and compounds used in the United States were imported. Principal uses were in phosphors for color-ray-intensifying screens. Yttria-stabilized zirconia was used in alumina-zirconia abrasives, bearings and seals, high -- -- -- -- -- Yttrium, alloys, compounds, and metal e, 2 742 676 616 450 760 Exports, in ore and concentrate NA NA NA NA

480

Effect of Yttrium on Dielectric, Pyroelectric and Piezoelectric Properties of Pbn Ferroelectrics  

NASA Astrophysics Data System (ADS)

Materials with batch formula Pb(1-x-3y/2)RyBaxNb2O6, where R=Y, (1-x)=0.73, 0.63, 0.53 and y=0.00, 0.02 have been prepared by the double sintering method. Substitution of yttrium (Y) restored tetragonal symmetry of PBN but reduced lattice parameters, cell volume and enhanced the density. Transition temperature of PBN has decreased due to the substitution of Y3+. Enhanced room temperature spontaneous polarization (Ps)=149.97 ?C/sq. cm has been observed in PBN53, which is above MPB, whereas enhanced value of Ps=112.74 ?C/sq. cm is found in Y: PBN63 at MPB region. The room temperature Pyroelectric coefficient (PRT=1.07) has been observed in the composition where maximum volume of Ps is obtained. Similarly, enhanced values of piezoelectric coefficients Kp=0.244, Kt=0.353, K31=0.131, d31=60, d33=159 and g31=3.65 have also been found in the same material PBN53. Substitution of Yttrium enhanced the stiffness constant 13.59 in PBN 73 to 14.27 of Y: PBN73.

Sambasiva Rao, K.; Vallis Nath, N.; Murali Krishna, P.; Madhava Prasad, D.; Lee, Joon Hyung

481

Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition  

DOEpatents

A ceramic composition is described. The ceramic composition consists essentially of from about 84 to 96 w/o titanium diboride, from about 1 to 9 w/o chromium diboride, and from about 3 to about 15 w/o yttrium-titanium-oxide. A method of making the ceramic composition is also described. The method of making the ceramic composition comprises the following steps: Step 1--A consolidated body containing stoichiometric quantities of titanium diboride and chromium diboride is provided. Step 2--The consolidated body is enclosed in and in contact with a thermally insulated package of yttria granules having a thickness of at least 0.5 inches. Step 3--The consolidated body enclosed in the thermally insulated package of yttria granules is heated in a microwave oven with microwave energy to a temperature equal to or greater than 1,900 degrees centigrade to sinter and uniformly disperse yttria particles having a size range from about 1 to about 12 microns throughout the consolidated body forming a densified body consisting essentially of titanium diboride, chromium diboride, and yttrium-titanium-oxide. The resulting densified body has enhanced fracture toughness and hardness. No Drawings

Holcombe, C.E.; Dykes, N.L.

1992-04-28

482

A study on the effect factors of sol-gel synthesis of yttrium aluminum garnet nanopowders  

NASA Astrophysics Data System (ADS)

Yttrium aluminum garnet (YAG) nanopowders were synthesized by sol-gel method using aluminum nitrate, yttrium nitrate, and citric acid as starting materials, de-ionized water, ethanol, and ethylene glycol as solvents, respectively. The phase formation process, state of particle size distribution (PSD), compositions, morphological characteristics, and thermal behavior of the powders were investigated by means of x-ray diffractometry, PSD, Fourier transform infrared, transmission electronic microscope, and thermogravimetry-differential scanning calorimetry. Results indicate that the formation and characteristics of precursor gel and YAG powder, such as the rate of gelation, average particle size, and powder agglomerate state, strongly depend on the stoichiometric amount of citric acid, the solvent composition, and the precalcination process. Highly crystalline, well-dispersed YAG nanopowder was obtained by calcining at 800 °C for 2 h in the presence of citric acid to nitrate ratio of 3, ethanol solvent, and precalcination process. According to the analysis of experimental results, sol-gel chemistry, DLVO theory, and steric effect, the effects of stoichiometric amount of citric acid, solvent composition, and precalcination process on the formation and characteristics of precursor gel and YAG powder have been discussed. Meanwhile, the overall synthesis mechanism in sol-gel method has been suggested.

Yang, Lin; Lu, Tiecheng; Xu, Hui; Zhang, Wei; Ma, Benyuan

2010-03-01

483

Improved pharmacokinetics of Yttrium-90 delivery with multivalent Fab{prime} fragments  

SciTech Connect

Humanised monoclonal antibodies have circulating half-lives in man of many days and one of the problems in using Yttrium-90 labelled versions for tumor therapy is the level of consequent whole body radiation. F(ab`){sub 2} fragments are rapidly cleared from the circulation but have relatively poor tumor uptake in biodistribution experiments. We initially developed a chemically cross-linked F(ab`)2 species (divalent Fab` maleimide or DFM) capable of carrying Yttrium-90 complexed to a 12N4 macrocycle. Although the DFM derived from the Fab` of cB72.3 had the desired pharmacokinetics of blood clearance with good tumor uptake in athymic nude mice carrying human tumor xenografts, significant retention of radioactivity by the kidneys was observed. We then progressed to higher oligomers and found that the trivalent Fab` maleimide (TFM), obtained via the structure below (n=3), when labelled with Y-90 possessed acceptable pharmacokinetics and good tumor uptake without kidney accumulation of radioactivity. The clinical evaluation of this technology is in progress.

Turner, A.; Boyce, B.A.; Antoniw, P. [Celltech Research, Berkshire (United Kingdom)] [and others

1994-05-01

484

Sintering of Titanium with Yttrium Oxide Additions for the Scavenging of Chlorine Impurities  

NASA Astrophysics Data System (ADS)

Chloride impurities in titanium powders are extremely difficult to remove and present a long-standing problem in titanium powder metallurgy. We show that the detrimental effects of chlorides on the sintering of titanium can be mitigated with trace additions of yttrium oxide, which has a high affinity for the normally volatile species and forms highly stable oxychloride reaction products. Compacts that would otherwise exhibit gross swelling and excessive porosity due to chloride impurities can be now sintered to near full density by liquid phase sintering. The potency of yttrium oxide additions is observable at levels as low as 500 ppm. The scavenging of chlorine by Y2O3 appears to be independent of alloy composition and sintering regime. It is effective when used with high-chloride powders such as Kroll sponge fines but ineffective when used with powders containing NaCl impurities or during solid-state sintering. The identification of highly potent chlorine scavengers may enable the future development of chloride-tolerant powder metallurgy (PM) alloys aimed at utilizing low-cost, high-chloride powder feedstocks.

Low, R. J.; Qian, M.; Schaffer, G. B.

2012-12-01

485

Yttrium-succinates coordination polymers: Hydrothermal synthesis, crystal structure and thermal decomposition  

SciTech Connect

New polymeric yttrium-succinates, Y{sub 2}(C{sub 4}H{sub 4}O{sub 4}){sub 3}(H{sub 2}O){sub 4}.6H{sub 2}O and Y{sub 2}(C{sub 4}H{sub 4}O{sub 4}){sub 3}(H{sub 2}O){sub 2}, have been synthesized, and their structures (solved by single crystal XRD) are compared with that of Y{sub 2}(C{sub 4}H{sub 4}O{sub 4}){sub 3}(H{sub 2}O){sub 2}.H{sub 2}O. Three compounds were obtained as single phases, and their thermal behaviour is described. - Graphical abstract: In the field of coordination polymers or MOF's, few studies report on the polymorphs of Ln(III)-succinic acid. Here, we describe the hydrothermal synthesis and structural characterization of two novel yttrium-succinates coordination polymers, respectively 2D and 3D, Y{sub 2}(C{sub 4}H{sub 4}O{sub 4}){sub 3}(H{sub 2}O){sub 4}.6H{sub 2}O and Y{sub 2}(C{sub 4}H{sub 4}O{sub 4}){sub 3}(H{sub 2}O){sub 2}.

Amghouz, Zakariae; Roces, Laura; Garcia-Granda, Santiago [Departamentos de Quimica Fisica y Analitica y Quimica Organica e Inorganica, Universidad de Oviedo, 33006 Oviedo (Spain); Garcia, Jose R., E-mail: jrgm@uniovi.e [Departamentos de Quimica Fisica y Analitica y Quimica Organica e Inorganica, Universidad de Oviedo, 33006 Oviedo (Spain); Souhail, Badredine [Departement de Chimie, Faculte des Sciences, Universite Abdelmalek Essaadi, 93002 Tetouan, Maroc (Morocco); Mafra, Luis; Shi, Fa-nian; Rocha, Joao [Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro (Portugal)

2009-12-15

486

Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition  

DOEpatents

A ceramic composition composition is described. The ceramic composition consists essentially of from about 84 to 96 w/o titanium diboride, from about 1 to 9 w/o chromium diboride, and from about 3 to aobut 15 w/o yttrium-titanium-oxide. A method of making the ceramic composition is also described. The method of making the ceramic composition comprises the following steps: Step 1--A consolidated body containing stoichiometric quantities of titanium diboride and chromium diboride is provided. Step 2--The consolidated body is enclosed in and in contact with a thermally insulated package of yttria granules having a thickness of at least 0.5 inches. Step 3--The consolidated body enclosed in the thermally insulated package of yttria granules is heated in a microwave oven with microwave energy to a temperature equal to or greater than 1,900 degrees centigrade to sinter and uniformly disperse yttria particles having a size range from about 1 to about 12 microns throughout the consolidated body forming a densified body consisting essentially of titanium diboride, chromium diboride, and yttrium-titanium-oxide. The resulting densified body has enhanced fracture toughness and hardness.

Holcombe, Cressie E. (Knoxville, TN); Dykes, Norman L. (Oak Ridge, TN)

1992-01-01

487

Electrical and Magnetic Properties of Nanostructured Mo-Doped Yttrium Iron Garnet  

NASA Astrophysics Data System (ADS)

Yttrium Iron Garnet (YIG) is a synthetic garnet and ferromagnetic with the chemical formula Y3Fe5O12. In YIG, five iron (III) ions occupy two octahedral and three tetrahedral sites, with yttrium (III) ions coordinated by eight oxygen ions in an irregular cube. The iron ions in the two coordination sites exhibit different spins, resulting in magnetic behavior. It is also transparent to infrared wavelengths over 600 nm. Nanostructured YIG has been synthesized systematically by solid state reaction method. The formation of pure YIG have been investigated through X-ray diffraction (XRD) beginning from weighing in molar proportions of Y2O3 and Fe2O3, mixing and grinding, pre-sintering and final sintering at 1300 ^oC. XRD study shows that YIG exhibits cubic structure with lattice constant of about 12 å. Magnetization with varying field and temperature has been measured using a SQUID magnetometer. Room temperature dielectric measurements indicate that the YIG shows the usual dielectric dispersion. Magnetic studies of Mo YIG has shown that it becomes diluted after doping and dielectric measurement have shown that dielectric constant of that sample has been reduced.

Khanra, S.; Laudari, A.; Kolekar, Y.; Kahol, P.; Ghosh, K.

2012-02-01

488

Targeted ?-Therapy  

PubMed Central

Monoclonal antibodies have become a viable strategy for the delivery of therapeutic, particle emitting radionuclides specifically to tumor cells to either augment anti-tumor action of the native antibodies or to solely take advantage of their action as targeting vectors. Proper and rational selection of radionuclide and antibody combinations is critical to making radioimmunotherapy (RIT) a standard therapeutic modality due to the fundamental and significant differences in the emission of either ?- and ?-particles. The ?-particle has a short path length (50-80 ?m) that is characterized by high linear energy transfer (?100 keV/?m). Actively targeted ?-therapy potentially offers a more specific tumor cell killing action with less collateral damage to the surrounding normal tissues than ß-emitters. These properties make targeted ?-therapy appropriate therapies to eliminate of minimal residual or micrometastatic disease. RIT using ?-emitters such as 213Bi, 211At, 225Ac, and others has demonstrated significant activity in both in vitro and in vivo model systems. Limited numbers of clinical trials have progressed to demonstrate safety, feasibility, and therapeutic activity of targeted ?-therapy, despite having to traverse complex obstacles. Further advances may require more potent isotopes, additional sources and more efficient means of isotope production. Refinements in chelation and/or radiolabeling chemistry combined with rational improvements of isotope delivery, targeting vectors, molecular targets, and identification of appropriate clinical applications remains as active areas of research. Ultimately, randomized trials comparing targeted ?-therapy combined with integration into existing standard of care treatment regimens will determine the clinical utility of this modality. PMID:17992276

Brechbiel, Martin W.

2008-01-01

489

Applications of an 88Y/Be photoneutron calibration source to dark matter and neutrino experiments.  

PubMed

The low-energy monochromatic neutron emission from an (88)Y/Be source can be exploited to mimic the few keV(nr) nuclear recoils expected from low-mass weakly interacting massive particles and coherent scattering of neutrinos off nuclei. Using this source, a target materials (superheated and noble liquids). PMID:23745854

Collar, J I

2013-05-24

490

STS-88 Commander Robert Cabana suits up before launch  

NASA Technical Reports Server (NTRS)

In the Operations and Checkout Building, STS-88 Commander Robert D. Cabana gives a thumbs up during suit check before launch. Mission STS-88 is expected to lift off at 3:56 a.m. EST with the six-member crew aboard Space Shuttle Endeavour on Dec. 3. Endeavour carries the Unity connecting module, which the crew will be mating with the Russian-built Zarya control module already in orbit. In addition to Unity, two small replacement electronics boxes are on board for possible repairs to Zarya batteries. The mission is expected to last 11 days, 19 hours and 49 minutes, landing at 10:17 p.m. EST on Dec. 14.

1998-01-01

491

S88 batch standard applied to continuous utility process  

SciTech Connect

A Dow Corning-developed automation model that uses the concepts and terminology outlined in the recently published Part 1 of ISA S88 batch control standard has been successfully applied to batch, semicontinuous, and continuous processes. Dow Corning`s model includes a programming methodology and a functional specification definition consistent with the standard, officially known as ISA-dS88.01, Batch Control Part 1: Models and Terminology. It coordinates the work, interlocks, and alarms within each unit and can coordinate the activities among units. Using this model on a continuous centrifugal compressor system resulted in a dramatic reduction in process downtime and an increase in operational reliability. Whereas it previously took four operators as long as eight hours to start a single compressor, it now takes only five minutes for two operators to start both compressors. The operation of the compressors has become so stable that it has virtually eliminated unplanned downtime. 4 figs.

Fleming, D.W.; Schreiber, P.E.

1996-02-01

492

Use of CAP88 at Department of Energy sites.  

PubMed

The U.S. Department of Energy is committed to protecting the public and environment against undue risk from radiation associated with radiological activities conducted under its control. Some U.S. Department of Energy Site activities result in emissions of radioactive materials to the air. CAP88 codes are used to model these emissions and the subsequent maximum estimated dose to a member of the public in the vicinity of the U.S. Department of Energy Site. This paper reviews the use of the CAP88 code at the variety of U.S. Department of Energy sites that use it for compliance reporting under Title 40 of the Code of Federal Regulations Part 61, Subpart H. PMID:23803670

Snyder, Sandra; Vázquez, Gustavo; Hay, Tristan

2013-08-01

493

Liquid-Liquid Extraction Studies of Trivalent Yttrium from Phosphoric Acid Solutions Using TOPS 99 as an Extractant  

Microsoft Academic Search

Liquid-liquid extraction studies of trivalent yttrium (Y) from phosphoric acid solutions have been carried out with commercial organophosphoric acid based extractant TOPS 99 (Talcher Organo phosphorus solvent, an equivalent of di-2-ethylhexyl phosphoric acid). The parameters studied include equilibration time, acid concentration, extractant concentration, diluent, metal concentration, temperature, stripping, and regeneration of the extractant. Increase of phosphoric acid concentration in the

B. Ramachandra Reddy; S. Radhika; B. Nagaphani Kumar

2010-01-01

494

Cathodoluminescence properties of yttrium aluminum garnet doped with Eu{sup 2+} and Eu{sup 3+} ions  

SciTech Connect

Yttrium aluminium garnet (YAG) doped with Eu{sup 2+} and Eu{sup 3+} ions is very interesting as a phosphor for conversion of light-emitting diode light for white light sources. The europium ion occupies the structural position of yttrium in yttrium aluminium garnet and has valence state Eu{sup 3+}. Our sample was doped with Zr{sup 4+}, which is why some of the europium ions had valence state Eu{sup 2+}. As a rule, luminescence of Eu{sup 3+} ions is observed in the orange and red range of spectrum. The luminescence of Eu{sup 2+} in yttrium aluminum garnet is characterized by an intensive broad band with maximum of intensity at about 560 nm (green color). In this work, we studied the intensity and decay time dependences on europium concentration, and the influence of excitation power density on the cathodoluminescence of the sample. The most interesting result is the change of visible cathodoluminescence color in dependence on the density of the exciting power.

Trofimov, A. N. [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation)], E-mail: trofimov.pti@gmail.com; Petrova, M. A. [Khlopin Radium Institute (Russian Federation); Zamoryanskaya, M. V. [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation)

2007-05-15

495

Kinetics of Yttrium-Ligand Complexation Monitored Using Hyperpolarized 89 as a Model for Gadolinium in Contrast Agents  

E-print Network

attractive for 89 Y NMR. Yttrium allows one to determine crystal defects in pyrochlores such as Y2Ti2-xSnxO7 of [1-13 C]pyruvate into [1-13 C]lactate and [1-13 C]alanine could be monitored in real time in Vi

496

Comparison of the air oxidation behaviors of Zircaloy4 implanted with yttrium and cerium ions at 500 °C  

Microsoft Academic Search

As a valuable process for surface modification of materials, ion implantation is eminent to improve mechanical properties, electrochemical corrosion resistance and oxidation behaviors of varieties of materials. To investigate and compare the oxidation behaviors of Zircaloy-4, implantation of yttrium ion and cerium ion were respectively employed by using an MEVVA source at the energy of 40 keV with a dose

X. W Chen; X. D Bai; J Xu; Q. G Zhou; B. S Chen

2002-01-01

497

Investigation of magnetic structure and magnetization process of yttrium iron garnet film by Lorentz microscopy and electron holography  

E-print Network

Investigation of magnetic structure and magnetization process of yttrium iron garnet film American Institute of Physics. doi:10.1063/1.3524273 I. INTRODUCTION Garnets are widely used materials in optical disks and microwave devices.1,2 In particular Y3Fe5O12 YIG films deposited on gadolinium-gallium-garnet

Krishnan, Kannan M.

498

Behaviour of zirconium, niobium, yttrium and the rare earth elements in the Thor Lake rare-metal  

E-print Network

Behaviour of zirconium, niobium, yttrium and the rare earth elements in the Thor Lake rare-metal © Emma Rebecca Sheard, 2010 #12;i ABSTRACT The Thor Lake rare-metal (Zr, Nb, Y, REE, Ta, Be, Ga) deposit and the heavy rare earth elements in the world. Much of the potentially economic mineralization was concentrated

499

Rare-Earth Ion Relaxation Time and G Tensor in Rare-Earth-Doped Yttrium Iron Garnet. I. Ytterbium  

Microsoft Academic Search

Microwave-resonance measurements at 9.3 and 16.8 Gc\\/sec between 1.5 and 300°K in the principal crystallographic directions of a single-crystal of yttrium iron garnet (YIG) doped with 5.1% Yb are compared with the predictions of the longitudinal (so-called \\

Barry H. Clarke; K. Tweedale; R. W. Teale

1965-01-01

500

Tetrahedral Fe2+ in Nb-Doped Yttrium Iron Garnet Detected by the Angular Variation of Induced Anisotropy  

Microsoft Academic Search

The presence of Fe2+ ions in tetrahedral sites of iron garnets has been detected for the first time. The particular material in which this occurred was flux-grown Nb-doped yttrium iron garnet. Proof of occupancy of tetrahedral sites by Fe2+ ions was obtained by Tucciarone's recently developed method of the angular variation of induced anisotropy.

B. Antonini; S. Geller; A. Paoletti; P. Paroli; A. Tucciarone

1978-01-01