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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

Separation of lanthanum, hafnium, barium and radiotracers yttrium-88 and barium-133 using crystalline zirconium phosphate and phosphonate compounds as prospective materials for a Ra223 radioisotope generator  

Microsoft Academic Search

Crystalline hybrid organic\\/inorganic ion exchangers based on zirconium phosphate and phosphonate compounds were evaluated for application in radium-223 generator for radiopharmaceutical applications. Various compositions were synthesized and the selectivity of these materials was determined for inactive lanthanum, hafnium and barium, and radiotracers yttrium-88 and barium-133. The hybrid materials show very efficient lanthanum\\/barium separation; the response for zirconium phosphate was even

Teresia Möller; Naima Bestaoui; Melissa Wierzbicki; Todd Adams; Abraham Clearfield

2011-01-01

3

Separation of lanthanum, hafnium, barium and radiotracers yttrium-88 and barium-133 using crystalline zirconium phosphate and phosphonate compounds as prospective materials for a Ra-223 radioisotope generator.  

PubMed

Crystalline hybrid organic/inorganic ion exchangers based on zirconium phosphate and phosphonate compounds were evaluated for application in radium-223 generator for radiopharmaceutical applications. Various compositions were synthesized and the selectivity of these materials was determined for inactive lanthanum, hafnium and barium, and radiotracers yttrium-88 and barium-133. The hybrid materials show very efficient lanthanum/barium separation; the response for zirconium phosphate was even better. A small-scale column loaded with pelletized zirconium phosphate compound demonstrated excellent retention of (88)Y and release of (133)Ba. PMID:21421323

Möller, Teresia; Bestaoui, Naima; Wierzbicki, Melissa; Adams, Todd; Clearfield, Abraham

2011-02-26

4

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

5

Establishing a Performance Management System for Targeted Welfare Programs. Research Report No. 88-14.  

ERIC Educational Resources Information Center

|A study examined a series of performance standards issues in the context of employment and training programs targeted toward the Aid to Families with Dependent Children (AFDC) population. Telephone interviews were conducted with representatives from the Job Training Partnership Act (JTPA) and departments of public welfare programs in nine states.…

Zornitsky, Jeffrey; And Others

6

X-ray emission analysis of a plasma source using an yttrium and a mylar target for the generation of 2.48 nm wavelength microbeam  

NASA Astrophysics Data System (ADS)

In this work, the characteristics of X-ray beam generated from a plasma produced by focusing a Nd-Yag/glass laser beam on mylar or yttrium target were presented.For each target material, the conversion efficiencies of the soft X-ray emission in two different energy ranges, (i) 300-510 eV (almost coincident with the Water Window), (ii) 450-850 eV were measured. The experimental results of the conversion efficiencies will be utilized at the PLASMA-X laboratory of L'Aquila University for the realization of an intense monochromatic X-ray microbeam to be used in radiobiological and in transmission X-ray microscopy applications. In the presented experimental set-up, at the wavelength of 2.48 nm, a monochromatic soft X-rays beam was collected by multilayer spherical mirrors reflecting at an incidence angle close to the normal of the surface.The optical system geometry, the monochromatic beam intensity and the measures of efficiency of conversion of X-ray were described in this paper [5].

Palladino, Libero; Lorenzo, Ramon Gimenez De; Emilio, Maurizio Di Paolo; Limongi, Tania

2013-05-01

7

Nitrogen contamination effect on yttrium gettering of hydrogen in liquid lithium  

NASA Astrophysics Data System (ADS)

Yttrium is a candidate for hydrogen hot trapping in a liquid tritium breeder of a fusion reactor blanket and in the flowing target of the International Fusion Materials Irradiation Facility, IFMIF. Nitrogen impurity in lithium is expected to decrease hydrogen trapping but this has not been confirmed. This study, directed at developing a hydrogen permeation device as a hydrogen concentration monitor in lithium, investigated hot trapping by yttrium in lithium. The hydrogen trapping rate of yttrium first aged in lithium containing nitrogen was smaller than the rate without nitrogen contamination. Nitrogen in contaminated yttrium did not form yttrium nitride, and the nitrogen diffused much deeper into the yttrium than did oxygen.

Yagi, Juro; Suzuki, Akihiro; Terai, Takayuki

2011-10-01

8

Metals Fact Sheet: Yttrium  

SciTech Connect

Yttrium is a metallic element usually included among the rare earth metals, which it resembles chemically and with which it usually occurs in minerals. Yttrium was named after the village of Ytterby in Sweden---the element was discovered in a quarry near the village. This article discusses sources of the element, the world market for the element, and various applications of the material.

NONE

1992-09-01

9

Quarks '88  

SciTech Connect

These proceedings contain papers relating to the Quarks '88 International Seminar. Included are the following groups: (1) Problems of Field Theory; (2) QCD and Quark Confinement; (3) Standard Model and Beyond; (4) Non-perturbative Aspects of Gauge Theories; (5) Gravity and Strings; (6) Quark Models and Phenomenology, and (7) Selected Experimental Topics.

Tavkhelidze, A.N. (Mathematical Inst. of the Georgian SSR, Academy of Sciences, Tbilisi (SU)); Matveev, V.A. (Inst. for Nuclear Research, Moscow (SU)); Larin, S.A.; Khlebnikov, S.Y. (Inst. for Nuclear Research of the USSR, Academy of Sciences, Moscow (SU))

1988-01-01

10

METALLOTHERMIC REDUCTION OF YTTRIUM HALIDES  

Microsoft Academic Search

An investigation was made of methods to prepare highpurity yttrium metal. ; Various methods were used to prepare pure intermediate compounds, primarily ; cblorides, bromides, and iodides, which were subsequently reduced to metal. The ; process found most suitable for the preparation of pure anhydrous yttrium ; chloride involved thermal dehydration of a mixture of hydrated yttrium chloride ; and

R. E. Mussler; T. T. Campbell; F. E. Block; G. B. Rodidart

1962-01-01

11

Yttrium oxide stabilized zirconium oxide  

SciTech Connect

This patent describes a process comprising: (a) forming a solution by mixing yttrium hydroxide and a sufficient amount of an aqueous solution of acetic acid to dissolve the yttrium hydroxide. The solution has a concentration of yttrium ion of about 5% to about 20% by weight of the solution, (b) adding from about 80% to about 95% by weight of zirconium oxide having a particle size range from about 1 to about 5 microns to yield a Zr to Y weight ratio of from about 4:1 to about 19:1 and thereby forming a slurry, (c) spray drying the slurry to form spherical agglomerates consisting essentially of zirconium oxide and a relatively uniform distribution of yttrium acetate whereby the agglomerates have a size from about 20 to about 200 micrometers, (d) heating the agglomerates to about 600/sup 0/C to about 700/sup 0/C in a neutral or oxidizing atmosphere to convert yttrium acetate to yttrium oxide to thereby form zirconium oxide yttrium oxide agglomerates with about 5% to about 20% by weight of yttrium oxide.

Ritsko, J.E.; Houck, D.L.; Acla, H.L.R.

1987-09-22

12

Investigation on Yttrium Activity in Liquid Aluminum by Yttrium Sensor  

NASA Astrophysics Data System (ADS)

Polycrystalline Y1- x Ca x F3- x ( x = 0.23 to 0.29) solid electrolyte samples were prepared by direct synthesis method, and their impedance spectra were measured in air at different temperatures. Results show that the conductivity is on the order of 10-5 to 10-2 S·cm-1 at 673 to 1023 K, and the activation energy ranges within 1.15 to 1.40 eV. The yttrium sensors were assembled with Y0.75Ca0.25F2.75 solid electrolyte and used to determine the activity of yttrium dissolved in liquid Al-Y alloys at 1033 K, while the accuracy of the yttrium sensors was identified by simultaneously measuring the oxygen content with a counterpart oxygen sensor. The variations of measured EMF with yttrium concentration are well coupled to each other between the yttrium cell and the oxygen cell and comply with the deoxidation law of active metals. In liquid aluminum, the activity coefficients of solute yttrium in infinite dilution state and the standard free energy change of yttrium dissolved at 1033 K were assessed as follows: ? ^{rule[1pt]{5pt}{.4pt}{kern-4.5pt}o}_{{text{Y}}} = 0.0013,{text{ }}? G^{rule[1pt]{5pt}{.4pt}{kern-4.5pt}o}_{{text{Y}}} = - 106.90{text{ KJ}} × {text{mol}}^{{ - {text{1}}}}.

Li, Y.; Yang, Y. J.; Wang, C. Z.

2008-04-01

13

SPECIFIC INHIBITION OF MYD88-INDEPENDENT SIGNALING PATHWAYS OF TOLL-LIKE RECEPTOR 3 AND 4 BY RESVERATROL: MOLECULAR TARGETS ARE TBK1 IN TRIF COMPLEX*  

Technology Transfer Automated Retrieval System (TEKTRAN)

Toll-like receptors can activate two distinct branches of downstream signaling pathways: MyD88 and TRIF pathways lead to the expression of pro-imflammatory cytokines and type I interferon genes, respectively. Numerous reports have demonstrated that resveratrol, a phytoalexin with anti-inflammatory ...

14

Summary of Fortran 88  

Microsoft Academic Search

The first part of this Fortran 88 Summary, through Section 4 in the following outline, appears in this issue. The next issue of Fortran Forum will continue with new features in the area of Data Types (including Structures and Arrays).

Loren P. Meissner

1989-01-01

15

Vaporization Thermodynamics of Yttrium Dicarbide–Carbon System and Dissociation Energy of Yttrium Dicarbide and Tetracarbide  

Microsoft Academic Search

The Knudsen effusion method was used in conjunction with a double-focusing mass spectrometer to study the vaporization of the yttrium dicarbide–carbon system. Over the temperature range from 2270 to 2550°K the measured vapor pressures for yttrium, yttrium dicarbide, and yttrium tetracarbide were found to be log10PY = (? 2.423 × 104 ? T) + 9.45, log10PYC2 = (? 3.286 ×

Fred J. Kohl; Carl A. Stearns

1970-01-01

16

Reaction of yttrium polonides with carbon dioxide  

Microsoft Academic Search

It has been proved that heating of yttrium and tantalum in carbon dioxide to 500 and 800°C alters the gas phase composition, causing formation of carbon monoxide and reduction of oxygen content. A study of the thermal stability of yttrium polonides in carbon dioxide showed that yttrium sesqui- and monopolonides decompose at 400-430°C. The temperature dependence of the vapor pressure

A. S. Abakumov; A. D. Khokhlov; N. F. Reznikova

1986-01-01

17

Electronic Transitions of Yttrium Monoxide  

NASA Astrophysics Data System (ADS)

The electronic transition spectrum of yttrium monoxide (YO) in the spectral region between 284nm and 307nm has been recorded using laser ablation/reaction free-jet expansion and laser induced fluorescence (LIF) spectroscopy. The YO molecule was produced by reacting laser-ablated yttrium atoms with O_{2} seeded in argon. Twenty transition bands were observed in that region and a few bands were selected for further study using optical-optical double resonance (OODR) spectroscopy. The excited C^{2} ? state has been reached via the intermediate B^{2} ?^{+} state from the ground X^{2} ?^{+} state. The excited sub-states observed so far have ? = 0.5 and 1.5. A least squares fit of the measured rotational lines yielded molecular constants for the newly observed excited states.

Ng, Y. W.; Wang, Na; Clark, Andrew B.; Cheung, A. S.-C.

2013-06-01

18

Targeting the genital tract mucosa with a lipopeptide/recombinant adenovirus prime/boost vaccine induces potent and long-lasting CD8+ T cell immunity against herpes: importance of MyD88.  

PubMed

Targeting of the mucosal immune system of the genital tract with subunit vaccines has failed to induce potent and durable local CD8(+) T cell immunity, which is crucial for protection against many sexually transmitted viral pathogens, including HSV type 2 (HSV-2), which causes genital herpes. In this study, we aimed to investigate the potential of a novel lipopeptide/adenovirus type 5 (Lipo/rAdv5) prime/boost mucosal vaccine for induction of CD8(+) T cell immunity to protect the female genital tract from herpes. The lipopeptide vaccine and the rAdv5 vaccine express the immunodominant HSV-2 CD8(+) T cell epitope (gB(498-505)), and both were delivered intravaginally in the progesterone-induced B6 mouse model of genital herpes. Compared with mice immunized with the homologous lipopeptide/lipopeptide (Lipo/Lipo) vaccine, the Lipo/rAdv5 prime/boost immunized mice 1) developed potent and sustained HSV-specific CD8(+) T cells, detected in both the genital tract draining nodes and in the vaginal mucosa; 2) had significantly lower virus titers; 3) had decreased overt signs of genital herpes disease; and 4) did not succumb to lethal infection (p < 0.005) after intravaginal HSV-2 challenge. Polyfunctional CD8(+) T cells, producing IFN-?, TNF-?, and IL-2 and exhibiting cytotoxic activity, were associated with protection (p < 0.005). The protective CD8(+) T cell response was significantly compromised in the absence of the adapter MyD88 (p = 0.0001). Taken together, these findings indicate that targeting of the vaginal mucosa with a Lipo/rAdv5 prime/boost vaccine elicits a potent, MyD88-dependent, and long-lasting mucosal CD8(+) T cell protective immunity against sexually transmitted herpes infection and disease. PMID:23018456

Zhang, Xiuli; Dervillez, Xavier; Chentoufi, Aziz Alami; Badakhshan, Tina; Bettahi, Ilham; Benmohamed, Lbachir

2012-09-26

19

Rare earths, the lanthanides, yttrium and scandium  

USGS Publications Warehouse

In 2005, rare earths were not mined in the United States. The major supplier, Molycorp, continued to maintain a large stockpile of rare-earth concentrates and compounds. Consumption decreased of refined rare-earth products. The United States remained a major importer and exporter of rare earths in 2005. During the same period, yttrium was not mined or refined in the US. Hence, supply of yttrium compounds for refined yttrium products came from China, France and Japan. Scandium was not also mined. World production was primarily in China, Russia and Ukraine. Demand for rare earths in 2006 is expected to be closely tied to economic conditions in the US.

Hedrick, J. B.

2006-01-01

20

Viral inhibitory peptide of TLR4, a peptide derived from vaccinia protein A46, specifically inhibits TLR4 by directly targeting MyD88 adaptor-like and TRIF-related adaptor molecule.  

PubMed

TLRs are critical pattern recognition receptors that recognize bacterial and viral pathogen-associated molecular patterns leading to innate and adaptive immune responses. TLRs signal via homotypic interactions between their cytoplasmic Toll/IL-1R (TIR) domains and TIR domain-containing adaptor proteins. Over the course of evolution, viruses have developed various immune evasion strategies, one of which involves inhibiting TLR signaling pathways to avoid immune detection. Thus, vaccinia virus encodes the A46 protein, which binds to multiple TIR-domain containing proteins, ultimately preventing TLRs from signaling. We have identified an 11-aa-long peptide from A46 (termed viral inhibitor peptide of TLR4, or VIPER), which, when fused to a cell-penetrating delivery sequence, potently inhibits TLR4-mediated responses. VIPER was TLR4 specific, being inert toward other TLR pathways, and was active in murine and human cells and in vivo, where it inhibited LPS-induced IL-12p40 secretion. VIPER also prevented TLR4-mediated MAPK and transcription factor activation, suggesting it acted close to the TLR4 complex. Indeed, VIPER directly interacted with the TLR4 adaptor proteins MyD88 adaptor-like (Mal) and TRIF-related adaptor molecule (TRAM). Viral proteins target host proteins using evolutionary optimized binding surfaces. Thus, VIPER possibly represents a surface domain of A46 that specifically inhibits TLR4 by masking critical binding sites on Mal and TRAM. Apart from its potential therapeutic and experimental use in suppressing TLR4 function, identification of VIPER's specific binding sites on TRAM and Mal may reveal novel therapeutic target sites. Overall, we demonstrate for the first time disruption of a specific TLR signaling pathway by a short virally derived peptide. PMID:20802145

Lysakova-Devine, Tatyana; Keogh, Brian; Harrington, Barry; Nagpal, Kamalpreet; Halle, Annett; Golenbock, Douglas T; Monie, Tom; Bowie, Andrew G

2010-08-27

21

Magnetoelastic waves in yttrium orthoferrite plates  

NASA Astrophysics Data System (ADS)

We have experimentally studied surface magnetoelastic waves in yttrium orthoferrite plates and discovered the phenomenon of energy pumping from the initial frequency (˜1 kHz) to higher harmonics (˜12.5 kHz).

Zhukov, E. A.; Kuz'menko, A. P.

2008-02-01

22

Infrared Isolator Using Yttrium Iron Garnet.  

National Technical Information Service (NTIS)

Infrared isolators using the Faraday rotation in a single crystal Yttrium Iron Garnet (YIG) and calcite dichroic polarizers have been built. By using the YIG crystal with thorium fluoride antireflection coating the authors obtained isolation better than 3...

H. Gamo S. S. Chuang

1970-01-01

23

Yttrium and barium in open clusters  

NASA Astrophysics Data System (ADS)

Based on the VLT high-resolution spectra for stars of five open clusters: Ruprecht 4, Ruprecht 7, Berkeley 25, Berkeley 73, and Berkeley 75 (G. Carraro et al., 2007) we determined the yttrium and barium abundances using the synthetic-spectrum method. Barium abundance was calculated under a non-LTE approximation. We analyzed the correlation between yttrium and barium abundances and the ages of open clusters and stars of the Galactic thin disk.

Mishenina, T. V.; Korotin, S. A.; Yegorova, I. A.; Kovtukh, V. V.; Carraro, G.

2013-06-01

24

Rare earths, the lanthanides, yttrium and scandium  

USGS Publications Warehouse

In 2011, rare earths were recovered from bastnasite concentrates at the Mountain Pass Mine in California. Consumption of refined rare-earth products decreased in 2011 from 2010. U.S. rare-earth imports originated primarily from China, with lesser amounts from Austria, Estonia, France and Japan. The United States imported all of its demand for yttrium metal and yttrium compounds, with most of it originating from China. Scandium was imported in various forms and processed domestically.

Bedinger, G.; Bleiwas, D.

2012-01-01

25

Irradiation of strontium chloride targets at proton energies above 35 MeV to produce PET radioisotope Y-86  

SciTech Connect

Proton irradiation of natural and enriched SrCl{sub 2} targets was used to produce PET radioisotope {sup 86}. The proton energy was degraded from the incident 117.8 MeV to induce the {sup 88}Sr(p,3n) reaction. For the irradiation three pellets made of {sup nat}SrCl{sub 2} (6.61 and 74.49 g) and {sup 88}SrCl{sub 2} (5.02 g) were pressed and individually encapsulated in stainless steel target bodies. The two smaller targets were irradiated for 0.5-1 h at the energy - 46 {yields} 37 MeV to take advantage of the peak in the excitation function of the {sup 88}Sr(p,3n) reaction. The larger target was irradiated at 66.4 {yields} 44.6 MeV. The irradiated pellets were chemically processed to selectively separate {sup 86}Y radioisotope using Eichrom DGA (N,N,N{prime},N{prime}-tetra-n-octyldiglycolamide) resin. The production yields of {sup 86}Y were determined to be 10-13 mCi/{mu}A h. Coproduction of {sup 87m}Y in the final product was 34% for {sup nat}SrCl{sub 2} and 54% for {sup 88}SrCl{sub 2} target. The chemical separation yield of yttrium reached 88-92%. The developed chemical procedure allows for the same day processing and shipment of the isotope to users.

Medvedev D. G.; Mausner, L.F.; Srivastava, S.C.

2011-12-01

26

Identification of Transmembrane Protein 88 (TMEM88) as a Dishevelled-binding Protein*  

PubMed Central

Wnt signaling pathways are involved in embryonic development and adult tissue maintenance and have been implicated in tumorigenesis. Dishevelled (Dvl/Dsh) protein is one of key components in Wnt signaling and plays essential roles in regulating these pathways through protein-protein interactions. Identifying and characterizing Dvl-binding proteins are key steps toward understanding biological functions. Given that the tripeptide VWV (Val-Trp-Val) binds to the PDZ domain of Dvl, we searched publically available databases to identify proteins containing the VWV motif at the C terminus that could be novel Dvl-binding partners. On the basis of the cellular localization and expression patterns of the candidates, we selected for further study the TMEM88 (target protein transmembrane 88), a two-transmembrane-type protein. The interaction between the PDZ domain of Dvl and the C-terminal tail of TMEM88 was confirmed by using NMR and fluorescence spectroscopy. Furthermore, in HEK293 cells, TMEM88 attenuated the Wnt/?-catenin signaling induced by Wnt-1 ligand in a dose-dependent manner, and TMEM88 knockdown by RNAi increased Wnt activity. In Xenopus, TMEM88 protein is sublocalized at the cell membrane and inhibits Wnt signaling induced by Xdsh but not ?-catenin. In addition, TMEM88 protein inhibits the formation of a secondary axis normally induced by Xdsh. The findings suggest that TMEM88 plays a role in regulating Wnt signaling. Indeed, analysis of microarray data revealed that the expression of the Tmem88 gene was strongly correlated with that of Wnt signaling-related genes in embryonic mouse intestines. Together, we propose that TMEM88 associates with Dvl proteins and regulates Wnt signaling in a context-dependent manner.

Lee, Ho-Jin; Finkelstein, David; Li, Xiaofeng; Wu, Dianqing; Shi, De-Li; Zheng, Jie J.

2010-01-01

27

ACTIVATION ANALYSIS FOR RARE-EARTH IMPURITIES IN YTTRIUM  

Microsoft Academic Search

A procedure was developed for the determination of a typical rare earth, ; terbium, in yttrium by activation analysis. Yttrium samples containing 0.02 to ; 2.0% terbium impurity were anaylzed. and, under the given experimental ; conditions, a detection limit of 0.0001% of terbium tn yttrium was calculated to ; be possible. The sensitivity of detection may be furtpder improv-ed

K. M. Wong; A. F. Voigt

1961-01-01

28

Yttrium oxide nanopowders from carbonate precursors  

Microsoft Academic Search

Reactions of solutions of yttrium oxide in nitric acid with a 1.67 M NH4HCO3 solution were studied by direct and back titration. When the concentration of the reacting solution was within 0.031–0.052\\u000a mol\\/L (as Y2O3), yttrium carbonate Y2(CO3)3 · nH2O (n ? 2.5) of fibrous or spherulitic morphology precipitated. When the concentration was decreased to 0.022 mol\\/L, a new phase

P. P. Fedorov; E. A. Tkachenko; S. V. Kuznetsov; V. V. Voronov; V. V. Osiko; K. S. Samarina; N. I. Batyrev; I. V. Gontar’; V. K. Ivanov

2010-01-01

29

Superconducting wires based on a yttrium ceramic  

NASA Astrophysics Data System (ADS)

A study was made of the fabrication of high temperature superconducting ceramic wires based on yttrium in various metallic shells. The shells used in the process were 10-mm-diameter thin-walled tubes of stainless steel (Kh18N10T), Nimonic alloy (Kh20N80), copper, and silver. Measurements of the critical current density is presented for the best specimens of round and rectangular cross sections. It is found that alloying of the yttrium ceramic by silver and gold makes it possible to double its current-carrying capacity.

Mitrokhin, V. A.; Dzhetymov, A. M.; Radchenko, I. P.; Svalov, G. G.; Sytnikov, V. E.; Aleksandrov, V. V.; Miuller, P.; Shubert, M.

1991-12-01

30

Proton trapping in yttrium-doped barium zirconate  

NASA Astrophysics Data System (ADS)

The environmental benefits of fuel cells have been increasingly appreciated in recent years. Among candidate electrolytes for solid-oxide fuel cells, yttrium-doped barium zirconate has garnered attention because of its high proton conductivity, particularly in the intermediate-temperature region targeted for cost-effective solid-oxide fuel cell operation, and its excellent chemical stability. However, fundamental questions surrounding the defect chemistry and macroscopic proton transport mechanism of this material remain, especially in regard to the possible role of proton trapping. Here we show, through a combined thermogravimetric and a.c. impedance study, that macroscopic proton transport in yttrium-doped barium zirconate is limited by proton–dopant association (proton trapping). Protons must overcome the association energy, 29?kJ?mol?1, as well as the general activation energy, 16?kJ?mol?1, to achieve long-range transport. Proton nuclear magnetic resonance studies show the presence of two types of proton environment above room temperature, reflecting differences in proton–dopant configurations. This insight motivates efforts to identify suitable alternative dopants with reduced association energies as a route to higher conductivities.

Yamazaki, Yoshihiro; Blanc, Frédéric; Okuyama, Yuji; Buannic, Lucienne; Lucio-Vega, Juan C.; Grey, Clare P.; Haile, Sossina M.

2013-07-01

31

Cerium and yttrium oxide nanoparticles are neuroprotective  

Microsoft Academic Search

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

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

2006-01-01

32

Yttrium. Properties, Phase Diagrams, Industrial Applications.  

National Technical Information Service (NTIS)

The book generalizes available literature data on the preparation and purification of yttrium, and also on its properties, phase diagrams, and the properties of its alloys. It also presents a survey of the most important branches of the application of ytt...

V. F. Terekhova E. M. Savitskii

1970-01-01

33

Research and Development of Yttrium Aluminate Lasers.  

National Technical Information Service (NTIS)

Yttrium orthoaluminate (YA1O3) doped with rare earth ions is investigated for use as an optically-pumped laser material. Two laser ions are studied in detail: neodymium (Nd3+) and holmium (Ho3+) sensitized with erbium and thulium. Measurements of optical ...

M. Bass M. J. Weber

1972-01-01

34

Hot-pressed polycrystalline yttrium iron garnet  

Microsoft Academic Search

A simple hot-pressing system is described which enables small volumes of polycrystalline yttrium iron garnet to be routinely produced. The products have high density, very low second phase content and a controlled grain size. Their magnetic properties compare very favourably with similar polycrystalline material produced by conventional sintering. Sample porosity may be varied in a controlled manner by simple changes

G. A. Naziripour; A. O. Tooke; K. J. Standley; B. E. Storey

1985-01-01

35

MAGNETOACOUSTIC RESONANCE IN YTTRIUM IRON GARNET  

Microsoft Academic Search

Polished spheres of single-crystal yttrium iron garnet were observed to ; resonate acoustically in the 5 to 30-Mc\\/sec region by applying a 9300 or a 3000-; Mc\\/sec electromagnetic signal under proper conditions. The ferromagnetic line ; width of the samples used was 0.5 oe. Observations and conclusions are presented. ; (W.D.M.);

E. G. Spencer; R. C. LeCraw

1958-01-01

36

Production and separation of no-carrier-added radioactive tracers of yttrium, strontium and rubidium from heavy-ion irradiated germanium target: applicability to the standardization of a separation technique for production of positron-emitting radionuclide 86Y.  

PubMed

Among various positron-emitting radionuclides, certain radioisotopes of Y, Sr and Rb have important applications in diagnostic and therapeutic nuclear medicine. In the present work, an attempt has been made to produce some of those radioisotopes by irradiating a natural Ge-target material with heavy-ion oxygen ((16)O(+6)) projectiles. An effective radiochemical separation scheme was developed to isolate Y, Sr and Rb radiotracers from the irradiated Ge-matrix in no-carrier-added form with a view to applying those radiotracers for standardization of a technique for the radiochemical separation of Y from natural Sr target. The standardized separation technique could be utilized for the production of the positron-emitting (86)Y from an enriched (86)Sr target irradiated at a medical cyclotron. PMID:16822676

Pal, Sujit; Chattopadhyay, Sankha; Das, M K; Sudersanan, M

2006-07-05

37

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

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Yttrium borate phosphate vanadate with europium and additional...Substances § 721.10627 Yttrium borate phosphate vanadate with europium and additional...identified generically as yttrium borate phosphate vanadate with europium and...

2013-07-01

38

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

39

The oxidation mechanism of Ni 3 Al containing yttrium  

Microsoft Academic Search

The high-temperature oxidation behavior of Ni3Al (Ni-13.2 wt.% Al) with and without additions of 0.5 wt.% yttrium has been studied over the range of 900–1200°C in air. None of the commonly accepted rate laws were followed by the kinetics. Although the weight gains of samples containing yttrium were consistently 10–20% greater than those without yttrium, the steady-state scaling rates were

J. D. Kuenzly; D. L. Douglass

1974-01-01

40

Phase transition in lithium yttrium oxide  

SciTech Connect

Ferroelectricity was studied in LiYO/sub 2/ with the aid of measurements of the dielectric constant, the electrical conductivity, and the polarizability as functions of the temperature. The investigation of polycrystalline lithium yttrium oxide revealed that under room conditions LiYO/sub 2/ is a dielectric. The temperature investigations carried out showed that the structural transformation is accompanied by a clearly expressed anomaly in the dielectric properties. It was established that the structural transformations in lithium yttrium oxide are accompanied by an antiferroelectric phase transition of the first kind. The temperature of the Curie-Weiss transition is 1130 K, the temperature of the Curie transition is 1170 K, and the dielectric constant at the Curie point equals 36,000.

Shuster, N.S.; Kuli-zade, E.S.

1988-08-01

41

Neodymium-doped laser yttrium oxide ceramics  

Microsoft Academic Search

We studied mechanical, optical, and lasing parameters of neodymium-doped yttrium oxide ceramics synthesised by using a new technology involving the laser synthesis of nanopowders and their magnetic pulsed compaction. The fracture toughness of ceramics to cracks and its microhardness were measured to be K{sub IC} = 0.9-1.4 MPa m¹² and H{sub } = 11.8 GPa, respectively. Ceramic samples sintered in

S N Bagaev; S M Vatnik; I A Vedin; A P Maiorov; E V Pestryakov; V V Osipov; M G Ivanov; V I Solomonov; V V Platonov; A N Orlov; A V Rasuleva; V V Ivanov; A S Kaigorodov; V R Khrustov; A V Shestakov; A V Salkov

2008-01-01

42

Microstrip lines using yttrium iron garnet film  

Microsoft Academic Search

The spectral-domain technique is used to compute the dispersion characteristics and the transverse field distributions of microstrip lines using a yttrium-iron-garnet (YIG) film on a gadolinium-gallium-garnet (GGG) substrate. Numerical results are presented to show a sharp cutoff characteristic for a large thickness of GGG (which is caused by the reduction in the negative permeability range), and to show the effect

M. Tsutsumi; T. Asahara

1990-01-01

43

Fluorine K-Shell X-Ray Cross-Section Measurements for Lithium, BORON10, Carbon, Nitrogen, and Oxygen Ions on Ultra-Clean Ultra-Thin Yttrium Trifluoride Solid Target Foils  

Microsoft Academic Search

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

Daniel Keith Marble

1991-01-01

44

Spectroscopy of88Y homologous levels  

NASA Astrophysics Data System (ADS)

The91Zr(zbar p, ?)88Y reaction has been studied at incident energy of 22 MeV using a polarized proton source and a Q3D spectrometer. The differential cross sections and asymmetries for transitions to levels of88Y homologous to the lowest excitation energy states of87Y have been measured and interpreted both in terms of the experimental differential cross sections and asymmetries of the parent87Y states and by means of the finite-range distorted wave Born approximation theory using conventional Woods-Saxon ?-particle potential. The advantage of the concept of homology consists in having to deal with a unique l-transfer, that given by the transition to the corresponding parent state. In order to validate the concept of homology as a spectroscopic tool to identify spin, parity and dominant configuration of highly excited states in (zbar p, ?) reaction on odd mass target nuclei, shell model calculations have been performed. Several new attributions of spin and parity for88Y residual nucleus are proposed.

Guazzoni, P.; Jaskola, M.; Zetta, L.; Gu, J.; Vitturi, A.; Graw, G.; Hertenberger, R.; Hofer, D.; Schiemenz, P.; Valnion, B.; Atzrott, U.; Staudt, G.; Cata-Danil, G.

1996-12-01

45

Characterization of alumina/yttrium-aluminum garnet and alumina/yttrium-aluminum perovskite eutectics  

SciTech Connect

Alumina/yttrium-aluminum garnet (YAG) and alumina/yttrium-aluminum perovskite (YAP) eutectics were made by directional solidification. The two systems were characterized using transmitted polarized light microscopy, scanning electron microscopy, and transmission electron microscopy. The alumina/YAG system exhibited a degenerate eutectic with a Chinese script morphology, while the alumina/YAP eutectic had a rod/lamellae morphology. The c-axis of alumina was aligned perpendicular to the solidification direction, and elongated grains were aligned along the solidification direction in both systems. A single orientation relationship between alumina and YAG was observed. Several orientation relationships were observed in the alumina/YAP system. 5 refs.

Matson, L.E.; Hay, R.S.; Mah, T.

1990-08-01

46

ARBO's 88 th Annual Meeting  

Microsoft Academic Search

record number of attendees representing 42 states were in attendance at ARBO's 88th Annual Meeting that took place June 24-26 at the Fairmont Copley Plaza in Boston, Massachusetts. The delegates participated in discus- sions, workshops, continuing education on new technology and ethical issues of particular interest to our member boards, and conducted the business of your organization. A good time

Janet L. Carter; Mike Ohlson; David Cockrell; Roger Seelye; Congressman Boozman; Russell Jones

2008-01-01

47

21 CFR 808.88 - Pennsylvania.  

Code of Federal Regulations, 2013 CFR

...88 Section 808.88 Food and Drugs FOOD AND DRUG ADMINISTRATION...PREEMPTION OF STATE AND LOCAL MEDICAL DEVICE REQUIREMENTS...of Specific State and Local Exemptions § 808.88...of the act because the Food and Drug...

2013-04-01

48

Yttrium 90 ibritumomab tiuxetan (Zevalin): a new bullet in the fight against malignant lymphoma?  

PubMed

Targeted immunotherapy utilizing monoclonal antibodies has improved survival in both indolent and aggressive lymphoma significantly. Since malignant lymphomas are also responsive to radiation, the combination of targeted immunotherapy and radiation with radionuclide coupled to monoclonal antibodies is an attractive option to further improve treatment results. Zevalin is a commercially available variation of the murine anti-CD20 antibody ibritumomab coupled to Yttrium 90 via the tiuxetan chelator. The development of this novel drug as well as the results of the pivotal studies and clinical strategies to implement this treatment into the routine practice of lymphoma oncology are presented in this review. PMID:17886241

Chapuy, Bjoern; Hohloch, Karin; Trümper, Lorenz

2007-11-01

49

Molten Salt Electrowinning of Magnesium-Yttrium Alloys.  

National Technical Information Service (NTIS)

Preparation of high-purity magnesium-yttrium alloys by electroreduction of Y2O3 dissolved in a YF3-LiF bath and the subsequent deposition of yttrium in a molten magnesium cathode was investigated in laboratory-scale apparatus. Parameters such as temperatu...

D. G. Kesterke D. J. MacDonald E. Aamland

1973-01-01

50

MOLYBDENUM AND THE EFFECTS OF MINOR ADDITIONS OF YTTRIUM  

Microsoft Academic Search

The effects of additions of yttrium as a scavenger of the interstitial ; oxygen and grain-boundary oxides in molybdenum were studied. Continuously cast ; small-diameter molybdenum ingots were prepared by melting compacted powder ; charges of the base metals and yttrium hydride in a non-consumable electrode arc ; furnace under an argon atmosphere. The soundness and structare of the ingots

D. T. Klodt; C. S. Miller; J. F. Nachman

1962-01-01

51

Characterization of yttrium implantation effect on pure iron  

NASA Astrophysics Data System (ADS)

Pure electrolytic iron samples were yttrium implanted using ion implantation method. Composition and structure studies were carried out before and after yttrium implantations by several analytical and structural techniques such as Rutherford backscattering spectrometry (RBS), secondary ion mass spectrometry (SIMS), reflection high energy electron diffraction (RHEED), electron spectroscopy for chemical analysis (ESCA) and X-ray diffraction (XRD) to characterize the yttrium implantation effect on the samples. The aim of this paper is to show the contribution of Rutherford backscattering spectrometry to the determination of yttrium depth probles in pure electrolytic iron. The results obtained by RBS will be compared to those of the other analyses performed in this work to show the existing correlation between composition and structural studies. Our results allow a better understanding of the effect of yttrium implantation in pure iron before studying the specimen corrosion resistance at high temperature.

Caudron, E.; Buscail, H.; Jacob, Y. P.; Josse-Courty, C.; Rabaste, F.; Stroosnijder, M. F.

1999-07-01

52

Ab initio calculations of yttrium chromite  

NASA Astrophysics Data System (ADS)

First principles calculations of the electronic and magnetic properties of Yttrium Chromite (YCrO3) are performed within generalized gradient approximation by ultrasoft pseudopotential with plane wave basis. Structural optimization revealed G-type antiferromagnet as the most stable structure for YCrO3. Electronic properties indicate that the material is an insulator and the introduction of Hubbard U parameter further increases the band gap from 1.43 eV to 1.64 eV. Using mean field approximation, the magnetic ordering temperature of YCrO3 is found to be 137 K which is close to the experimental value.

Nair, Vidhya G.; Ganeshraj, C.; Santhosh, P. N.; Subramanian, V.

2013-02-01

53

Yttrium ENDF\\/B-VII Data from Theory and LANSCE\\/GEANIE Measurements and Covariances Estimated using Bayesian and Monte-Carlo Methods  

Microsoft Academic Search

Yttrium plays an important role as a radiochemical dosimetry detector for determining high energy 14 MeV neutron fluences, through measurement of (n,2n) activation products. The total (n,2n) cross section is known rather well from extensive activation measurements on the stable 89Y isotope, and from a previous activation measurement on the unstable 88Y ground state. However, until now the branching ratios

M. B. Chadwick; T. Kawano; P. Talou; E. Bauge; S. Hilaire; P. Dossantos-Uzarralde; P. E. Garrett; J. A. Becker; R. O. Nelson

2007-01-01

54

Luminescence characterization of cerium doped yttrium gadolinium aluminate phosphors  

NASA Astrophysics Data System (ADS)

Yttrium gadolinium aluminate ((Y1-xGdx)3 Al5O12:Ce) doped cerium phosphors with the different yttrium and gadolinium concentration were prepared by a wet-chemical route via the reagent simultaneous addition technique (WCS-SimAdd). The phosphors were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL), radioluminescence (RL) of cerium doped yttrium gadolinium aluminate phosphors. With increasing Gd dopant concentration, the PL intensity was shifted to the red region. Preliminary RL measurements were performed to further evaluate these newly prepared materials. Intense RL was observed that is typical of Ce3+ doped structure.

Uysal Satilmis, S.; Ege, A.; Ayvacikli, M.; Khatab, A.; Ekdal, E.; Popovici, E. J.; Henini, M.; Can, N.

2012-09-01

55

Radioactive synovectomy with Yttrium?? citrate in haemophilic synovitis: Brazilian experience.  

PubMed

Recurrent haemarthroses leading to chronic synovitis and arthropathy remain a major cause of morbidity in patients with haemophilia. Radioactive synovectomy (RS) is considered the first choice of treatment for chronic haemophilic synovitis. The aim of this study was to evaluate the effect of RS with Yttrium(90) citrate (C-Y(90)) in the joints of patients with chronic haemophilic synovitis. From 2003 to 2007, 245 joints (118 knees, 76 elbows, 49 ankles and two shoulders) of 190 patients with haemophilia or von Willebrand disease were submitted to RS with C-Y(90) at Hemocentro de Mato Grosso, Brazil. Forty joints had radiographic Pettersson scores above 8. There were 36 joints of 22 patients with inhibitors to factor VIII. The procedure was safe with low occurrence of adverse events. The main effect was the overall reduction in joint bleeding frequency, from 19.8 to 2.6 per year post-RS. Similar results were obtained in cases with high radiographic scores and in inhibitor patients. Pain reduction was observed in most cases. Average range of motion was maintained or increased 1 year post-RS in most joints. Extension was stable or increased in 88.2% of the knees and 86.5% of the elbows. Ankle plantarflexion was stable or increased in 90.9%, whereas dorsiflexion was maintained or increased in 87.9%. Worsening of the range of motion, when present, ranged from 14 to 17 degrees. We concluded that RS with C-Y(90) represents an important resource for the treatment of chronic haemophilic synovitis, markedly reducing joint bleeding frequency and pain, irrespective of the radiographic stage and inhibitor status. PMID:20731723

Thomas, S; Gabriel, M B; Assi, P E; Barboza, M; Perri, M L P; Land, M G P; Da Costa, E S

2010-08-22

56

Erosive Resistance of Zirconium Dioxide, Stabilized by Yttrium Oxide.  

National Technical Information Service (NTIS)

Results are presented from the study of the erosion resistance of zirconium dioxide stabilized by yttrium oxide under conditions corresponding to the function of electrodes in the channel of an open cycle type MHD generator. It is experimentally shown tha...

A. B. Ivanov A. I. Rekov I. S. Mayauskas R. I. Abraitis V. G. Gordon

1971-01-01

57

Acute knee joint rupture after yttrium 90 injection.  

PubMed Central

Two cases of acute rupture of the knee joint are reported after the intra-articular injection of radioactive yttrium 90. It is suggested that this may be a complication of intra-articular radioactive injections.

Davis, P; Jayson, M I

1975-01-01

58

49 CFR 393.88 - Television receivers.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 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...

2012-10-01

59

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

60

32 CFR 88.4 - Policy.  

Code of Federal Regulations, 2013 CFR

... 88.4 Section 88.4 National Defense Department of Defense OFFICE OF THE SECRETARY OF DEFENSE PERSONNEL, MILITARY AND CIVILIAN ...their families with the skills, tools, and self-confidence necessary to ensure...

2013-07-01

61

7 CFR 3570.88 - Management assistance.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Management assistance. 3570.88 Section...SERVICE, DEPARTMENT OF AGRICULTURE COMMUNITY PROGRAMS Community Facilities Grant Program § 3570.88 Management assistance. Grant recipients...

2013-01-01

62

Incomplete spin reorientation in yttrium orthoferrite  

NASA Astrophysics Data System (ADS)

High-magnetic-field measurements of the magnetic moment of single crystals of yttrium orthoferrite were performed by torque and vibrating sample magnetometers. We investigated the magnetic states before and at the end of the field-induced spin reorientation and compared them with the theoretical predictions given by a macrospin model. The model describes the spin reorientation for low magnetic fields well. For high magnetic fields, the model predicts a 90? spin rotation while the experiments indicate that the magnetic moment only rotates by 80? for H=74 kOe and remains about 10? out of a crystallographic axis, up to the highest measured field (280 kOe). This suggests that the initial magnetic interactions are altered by the strain induced by the spin reorientation, leading to a symmetry change.

Scola, J.; Dumont, Y.; Keller, N.; Vallée, M.; Caputo, J.-G.; Sheikin, I.; Lejay, P.; Pautrat, A.

2011-09-01

63

Cellular texture of mixtures of calcium (magnesium) and yttrium oxides  

Microsoft Academic Search

In solid-phase sintering of calcium (magnesium) oxides with yttrium oxide, the sintered material acquires a cellular texture visible on x-ray photographs obtained in the characteristic yttrium radiation as shown in this paper. Formation of a cellular texture in materials obtained in the systems CaO-YâOâ and MgO-YâOâ is studied. The practical importance of formation of cellular texture lies in the shielding

K. K. Strelov; V. A. Kamenskikh; Yu. P. Gilev; E. Yu. Udilova

1987-01-01

64

9 CFR 381.88 - Parasites.  

Code of Federal Regulations, 2010 CFR

...2009-01-01 2009-01-01 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...

2009-01-01

65

9 CFR 381.88 - Parasites.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 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...

2010-01-01

66

27 CFR 9.88 - Pacheco Pass.  

Code of Federal Regulations, 2010 CFR

...2009-04-01 2009-04-01 false Pacheco Pass. 9.88 Section 9.88 Alcohol...American Viticultural Areas § 9.88 Pacheco Pass. (a) Name. The name of the...viticultural area described in this section is âPacheco Pass.â (b) Approved maps....

2009-04-01

67

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...American Viticultural Areas § 9.88 Pacheco Pass. (a) Name. The name of the...viticultural area described in this section is âPacheco Pass.â (b) Approved maps....

2010-04-01

68

27 CFR 9.88 - Pacheco Pass.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 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 âPacheco Pass.â (b) Approved maps. The...

2013-04-01

69

Reflectance, optical properties, and stability of molybdenum/strontium and molybdenum/yttrium multilayer mirrors  

NASA Astrophysics Data System (ADS)

The motivation of this work is to develop high reflectance normal-incidence multilayer mirrors in the 8 12 nm wavelength region for applications in astronomy and extreme ultraviolet lithography. To achieve this goal, Mo/Sr and Mo/Y multilayers were studied. These multilayers were deposited with a UHV magnetron sputtering system and their reflectances were measured with synchrotron radiation. High normal-incidence reflectances of 23% at 8.8 rim, 40.8% at 9.4 nm, and 48.3% at 10.5 nm were achieved. However, the reflectance of Mo/Sr multilayers decreased rapidly after exposure to air. Experimental results on the refractive index ñ =1 - ? + i? of yttrium and molybdenum in the 50 1300 eV energy region are reported in this work. This is the first time ever that values on the refractive index of yttrium are measured in this energy range. The absorption part ? was determined through transmittance measurements. The dispersive part ? was calculated by means of the Kramers-Kronig formalism. The newly determined values of the refractive index of molybdenum are in excellent agreement with the published data. Those of yttrium are more accurate and contain fine structures around the yttrium M-absorption edges where Mo/Y multilayers operate. The reflectance quality of Mo/Y multilayers is dependent on their optical and structural properties. To correlate these properties with the multilayer reflectance, x-ray diffraction, Rutherford backscattering spectrometry, and transmission electron miscroscopy were used to analyze samples. Normal-incidence reflectances of 32.6% at 9.27 nm, 38.4% at 9.48 nm, and 29.6% at 9.46 nm were obtained from three representative Mo/Y multilayers which had about 0%, 25%, and 39% atomic oxygen assimilated in their yttrium layers, respectively. Based on the optical properties, multilayers with higher oxygen content should have higher absorption. However, the 25%-oxygen multilayer had less interface roughness and thus had higher reflectance than the 0%-oxygen sample. Mo/Y (39% oxygen) multilayers terminated with molybdenum, yttrium (39% oxygen), and palladium were studied. These samples all experienced significant reflectance drop in the first three months after deposition due to surface contamination or oxidation. The reflectance peaks were shifted toward shorter wavelengths because of interface contraction. The performance of a Mo/Y (25% oxygen) multilayer-coated diffraction grating was investigated. The grating substrate was a replica of a holographic ion-etched blazed grating with 2400 grooves/mm. The measured peak efficiency in the third order was 2.7% at 8.79 nm. This is the highest normal-incidence grating efficiency ever obtained to date in this wavelength region. (Abstract shortened by UMI.)

Kjornrattanawanich, Benjawan

70

Density functional study on structural and electronic properties of bimetallic gold yttrium clusters: comparison with pure gold and yttrium clusters  

Microsoft Academic Search

Employing first-principles methods, based on the density functional theory, this paper investigates the ground state geometric and electronic properties of pure gold clusters, pure yttrium clusters and gold clusters doped each with one yttrium atom. It is shown that the average bond lengths in the Aun-1Y(n <= 9) bimetallic clusters are shorter than those in the corresponding pure gold and

Hua-Ping Mao; Hong-Yan Wang; Yong Sheng

2008-01-01

71

PET Imaging of Soluble Yttrium-86-Labeled Carbon Nanotubes in Mice  

PubMed Central

Background The potential medical applications of nanomaterials are shaping the landscape of the nanobiotechnology field and driving it forward. A key factor in determining the suitability of these nanomaterials must be how they interface with biological systems. Single walled carbon nanotubes (CNT) are being investigated as platforms for the delivery of biological, radiological, and chemical payloads to target tissues. CNT are mechanically robust graphene cylinders comprised of sp2-bonded carbon atoms and possessing highly regular structures with defined periodicity. CNT exhibit unique mechanochemical properties that can be exploited for the development of novel drug delivery platforms. In order to evaluate the potential usefulness of this CNT scaffold, we undertook an imaging study to determine the tissue biodistribution and pharmacokinetics of prototypical DOTA-functionalized CNT labeled with yttrium-86 and indium-111 (86Y-CNT and 111In-CNT, respectively) in a mouse model. Methodology and Principal Findings The 86Y-CNT construct was synthesized from amine-functionalized, water-soluble CNT by covalently attaching multiple copies of DOTA chelates and then radiolabeling with the positron-emitting metal-ion, yttrium-86. A gamma-emitting 111In-CNT construct was similarly prepared and purified. The constructs were characterized spectroscopically, microscopically, and chromatographically. The whole-body distribution and clearance of yttrium-86 was characterized at 3 and 24 hours post-injection using positron emission tomography (PET). The yttrium-86 cleared the blood within 3 hours and distributed predominantly to the kidneys, liver, spleen and bone. Although the activity that accumulated in the kidney cleared with time, the whole-body clearance was slow. Differential uptake in these target tissues was observed following intraveneous or intraperitoneal injection. Conclusions The whole-body PET images indicated that the major sites of accumulation of activity resulting from the administration of 86Y-CNT were the kidney, liver, spleen, and to a much less extent the bone. Blood clearance was rapid and could be beneficial in the use of short-lived radionuclides in diagnostic applications.

Jaggi, Jaspreet S.; Finn, Ronald D.; Zanzonico, Pat B.; Villa, Carlos; Rey, Diego; Mendenhall, Juana; Batt, Carl A.; Njardarson, Jon T.; Scheinberg, David A.

2007-01-01

72

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

73

Yttrium Acetate-Derived Particle Coatings for Mitigating Oxidation and Corrosion of Inconel 625  

Microsoft Academic Search

“Sol paint” that yields yttrium-based compounds was prepared by mixing four chemical ingredients, yttrium acetate tetrahydrate precursor, diethanolamine, isopropyl alcohol, and hydrochloric acid, and then applied as oxidation\\/corrosion resistant coatings for Inconel 625 substrates. Annealing the coatings at 500°C developed a coalescent microstructure of coarse particles consisting of amorphous yttrium carbonate as the major component and crystalline yttrium oxide (Y2O3)

T. Sugama

1998-01-01

74

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

2012-08-15

75

Structural phase transitions in yttrium under ultrahigh pressures  

NASA Astrophysics Data System (ADS)

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.

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

2012-09-01

76

Yttrium-90 microsphere induced gastrointestinal tract ulceration  

PubMed Central

Background Radiomicrosphere therapy (RT) utilizing yttrium-90 (90Y) microspheres has been shown to be an effective regional treatment for primary and secondary hepatic malignancies. We sought to determine a large academic institution's experience regarding the extent and frequency of gastrointestinal complications. Methods Between 2004 and 2007, 27 patients underwent RT for primary or secondary hepatic malignancies. Charts were subsequently reviewed to determine the incidence and severity of GI ulceration. Results Three patients presented with gastrointestinal bleeding and underwent upper endoscopy. Review of the pretreatment angiograms showed normal vascular anatomy in one patient, sclerosed hepatic vasculature in a patient who had undergone prior chemoembolization in a second, and an aberrant left hepatic artery in a third. None had undergone prophylactic gastroduodenal artery embolization. Endoscopic findings included erythema, mucosal erosions, and large gastric ulcers. Microspheres were visible on endoscopic biopsy. In two patients, gastric ulcers were persistent at the time of repeat endoscopy 1–4 months later despite proton pump inhibitor therapy. One elderly patient who refused surgical intervention died from recurrent hemorrhage. Conclusion Gastrointestinal ulceration is a known yet rarely reported complication of 90Y microsphere embolization with potentially life-threatening consequences. Once diagnosed, refractory ulcers should be considered for aggressive surgical management.

South, Christopher D; Meyer, Marty M; Meis, Gregory; Kim, Edward Y; Thomas, Fred B; Rikabi, Ali A; Khabiri, Hooman; Bloomston, Mark

2008-01-01

77

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

Code of Federal Regulations, 2013 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...

2013-07-01

78

RBS and GAXRD Contributions to Yttrium Implanted Extra Low Carbon Steel Characterization  

Microsoft Academic Search

Extra low carbon steel samples were yttrium implanted using an ion implantation method. Composition and structural studies were carried out before and after yttrium implantations by several analytical and structural techniques (Rutherford backscattering spectrometry, reflection high energy electron diffraction, scanning electron microscopy, X-ray diffraction, and glancing angle X-ray diffraction) to characterize the yttrium implantation effect on extra low carbon steel.

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

1999-01-01

79

PROPERTIES OF YTTRIUM AND THE RARE EARTH METALS OXYGEN AND ALLOY SYSTEMS. OXYGEN AND ALLOY SYSTEMS  

Microsoft Academic Search

Partial constitutional diagrams were established for a number of systems ; containing yttrium and the lanthanide elements. Alpha yttrium and erbium are ; completely soluble in all proportions. The yttrium --neodymiuin system is more ; complex. There is partial solubility at both ends of the system. An ; intermediate phase is present at the equiatomic percentage composition. No ; marked

Love

1961-01-01

80

40 CFR 721.10009 - Manganese yttrium oxide (MnYO3).  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Manganese yttrium oxide (MnYO3). 721.10009...Chemical Substances § 721.10009 Manganese yttrium oxide (MnYO3 ). (a...The chemical substance identified as manganese yttrium oxide (MnYO3 ) (PMN...

2013-07-01

81

40 CFR 721.10013 - Manganese yttrium oxide (Mn2YO5).  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Manganese yttrium oxide (Mn2YO5). 721.10013...Chemical Substances § 721.10013 Manganese yttrium oxide (Mn2 YO5 ). ...The chemical substance identified as manganese yttrium oxide (Mn2 YO5 )...

2013-07-01

82

Observation of dislocations and inclusions in neodymiumdoped yttrium aluminium garnet by transmission electron microscopy  

Microsoft Academic Search

Dislocations and inclusions in neodymium-doped yttrium aluminium garnet were observed by transmission electron microscopy. Network dislocations on {111} planes are parallel to ?110? directions and appear to be undissociated. Electron diffraction patterns from the inclusions show them to be single crystals of the orthorhombic yttrium aluminate perovskite-type. Electron microprobe analysis of similar inclusions indicates that they are crystals of yttrium

B. Hardiman; R. Bucksch; P. Korczak

1973-01-01

83

Method for Controlling the Resonance Frequency of Yttrium Iron Garnet Films.  

National Technical Information Service (NTIS)

A method for controlling the resonance frequency of single crystal yttrium iron garnet (YIG) films by incorporating lead as a partial substituent for the yttrium component of the YIG film. This invention relates to yttrium iron garnet films and to a metho...

H. L. Glass

1979-01-01

84

The Brucella TIR-like protein TcpB interacts with the death domain of MyD88  

PubMed Central

The pathogen Brucella melitensis secretes a Toll/interleukin-1 receptor (TIR) domain containing protein that abrogates host innate immune responses. In this study, we have characterized the biochemical interactions of Brucella TIR-like protein TcpB with host innate immune adaptor proteins. Using protein-fragment complementation assays based on Gaussia luciferase and green fluorescent protein, we find that TcpB interacts directly with MyD88 and that this interaction is significantly stronger than the interaction of TcpB with TIRAP, the only other adaptor protein that detectably interacts with TcpB. Surprisingly, the TcpB–MyD88 interaction depends on the death domain (DD) of MyD88, and TcpB does not interact with the isolated TIR domain of MyD88. TcpB disrupts MyD88DD-MyD88DD, MyD88DD-MyD88TIR and MyD88DD-MyD88 interactions but not MyD88–MyD88 or MyD88TIR-MyD88TIR interactions. Structural models consistent with these results suggest how TcpB might inhibit TLR signaling by targeting MyD88 via a DD–TIR domain interface.

Chaudhary, Anu; Ganguly, Kumkum; Cabantous, Stephanie; Waldo, Geoffrey S.; Micheva-Viteva, Sofiya N.; Nag, Kamalika; Hlavacek, William S.; Tung, Chang-Shung

2011-01-01

85

PROCESS FOR SEPARATING YTTRIUM FROM THE RARE EARTHS BY SOLVENT EXTRACTION  

DOEpatents

A process of isolating yttrium from other rare earths present together with it in aqueous solutions is presented. Yttrium and rare earths heavier than yttrium are first extracted with dialkyl phosphoric acid, after adjustment of the acidity to 2 N, and then back-extracted with 5-6 N mineral acid to form a strip solution. Thiocyanate is added to the strip solution and the rare earths heavier than yttrium are then selectively extracted with trialkyl phosphate, dialkyl phosphoric acid, alkyl phosphonate, or dialkyl aryl phosphonate, leaving the yttrium in the aqueous solution. (AEC)

Peppard, D.F.; Mason, G.W.

1963-11-12

86

Deposition of yttrium oxide thin films in supercritical carbon dioxide  

Microsoft Academic Search

A synthetic avenue for the formation of yttrium oxide thin films on Si native oxide surfaces is demonstrated by the reaction of Tris(2,2,6,6-tetramethyl-3,5-heptanedionato) yttrium(III) with inorganic (H2O2) and organic (tert-butyl and di-tert-amyl) peroxides in supercritical carbon dioxide. The reactions are carried out in a hot wall reactor at temperatures below 130 °C and pressures ranging from 13.10 to 22.75 MPa. Spectroscopic Ellipsometry

Theodosia Gougousi; Zhiying Chen

2008-01-01

87

Availability of yttrium-90 from strontium-90: a nuclear medicine perspective.  

PubMed

Yttrium-90 (T(½) 64.1 hours, E(?max)=2.28 MeV) is a pure ?? particle emitting radionuclide with well-established applications in targeted therapy. There are several advantages of ??Y as a therapeutic radionuclide. It has a suitable physical half-life (?64 hours) and decays to a stable daughter product ??Zr by emission of high-energy ?? particles. Yttrium has a relatively simple chemistry and its suitability for forming complexes with a variety of chelating agents is well established. The ??Sr/??Y generator is an ideal source for the long-term continuous availability of no-carrier-added ??Y suitable for the preparation of radiopharmaceuticals for radionuclide therapy. The parent radionuclide ??Sr, which is a long-lived fission product, is available in large quantities from spent fuel. Several useful technologies have been developed for the preparation of ??Sr/??Y generators. There are several well-established radiopharmaceuticals based on monoclonal antibodies, peptides, and particulates labeled with ??Y, that are in regular use for the treatment of some forms of primary cancers and arthritis. At present, there are no generators for the elution of ??Y that can be set up in a hospital radiopharmacy. The radionuclide is procured from manufacturers and the radiopharmaceuticals are formulated on site. This article reviews the development of ??Sr/??Y generator and the development of ??Y radiopharmaceuticals. PMID:23009585

Chakravarty, Rubel; Dash, Ashutosh; Pillai, M R A

2012-09-25

88

Thermal Decomposition of Lanthanide, Yttrium, and Scandium Oxalates and Carbonates  

Microsoft Academic Search

Data concerning the thermal decomposition of lanthanide, yttrium, and scandium oxalates and carbonates are surveyed. The complexity of the process, the large number of stages involved, and the dependence of the composition of the intermediates in the thermal transformations on the experimental conditions is noted. Certain process characteristics have been discovered and it is concluded that the decomposition process depends

Vyacheslav A. Sharov; G. V. Bezdenezhnykh

1981-01-01

89

The influence of yttrium on oxide scale growth and adherence  

Microsoft Academic Search

Alloys and coatings for high-temperature service are designed to form selectively chromia scales, alumina scales, or, to a limited extent, silica scales upon exposure to the environment. For such oxide scales to be protective, they should be both slow growing and adherent. It turns out that the addition of yttrium to such alloys can often impart both characteristics to the

T. A. Ramanarayanan; R. Ayer; R. Petkovic-Luton; D. P. Leta

1988-01-01

90

Microwave magnetostatic delay devices based on epitaxial yttrium iron garnet  

Microsoft Academic Search

Low-loss magnetostatic wave (MSW) propagation in epitaxial yttrium iron garnet (YIG) films allows the development of a technology which is complementary to that of surface acoustic waves (SAW's), but capable of operation in the microwave range from 1 to greater than 12 GHz. Experimental low-loss dispersive and nondispersive tapped delay lines are described. Future developments of MSW's involving signal routing

J. D. Adam; J. H. Collins

1976-01-01

91

Synthesis of yttrium iron garnet precursor particles by homogeneous precipitation  

Microsoft Academic Search

Yttrium iron garnet (YIG) precursor particles were obtained by homogeneous precipitation in a nitrate salt solution by a reaction involving the thermal decomposition of urea. Chemical analysis indicated that solid phases were initially precipitated with sequential iron ion content. The precipitate formed was an amorphous mixed iron oxide phase. The complex composition and the thermal decomposition of the precipitate were

Y. S. Ahn; M. H. Han; C. O. Kim

1996-01-01

92

Preparation and characterization of spherical yttrium iron garnet via coprecipitation  

Microsoft Academic Search

The purpose of this work is to obtain spherical particles yttrium iron garnet (YIG) by coprecipitation technique. The spherical particles were obtained from either nitrate or chloride salt solutions by controlling the precipitation medium. Different agents of dispersion such as PVP and ammonium iron sulfate were used to optimize the shape and size of YIG. Samples were characterized by X-ray

M. Jafelicci; R. H. M. Godoi

2001-01-01

93

Synthesis and Characterization of Yttrium Iron Garnet Nanoparticles  

Microsoft Academic Search

Yttrium iron garnet (YIG) was synthesized from a citrate gel containing ethylene glycol. The conditions for obtaining the pure phase depending on the citric acid\\/ethylene glycol ratio were studied. The sizes of the obtained particles ranged from 20 to 500 nm with the annealing temperature. Particles exhibited a rounded surface morphology, without faceted borders.

P. Vaqueiro; M. P. Crosnier-Lopez; M. A. López-Quintela

1996-01-01

94

16 CFR 1.88 - Implementing procedures.  

Code of Federal Regulations, 2013 CFR

...Implementation of the National Environmental Policy Act of 1969 § 1.88 Implementing...Bureaus of Consumer Protection and Competition will supplement these procedures...for Litigation and Environmental...

2013-01-01

95

50 CFR 260.88 - Political activity.  

Code of Federal Regulations, 2011 CFR

...FOOD PRODUCTS INSPECTION AND CERTIFICATION Inspection and Certification of Establishments and Fishery Products for Human Consumption Miscellaneous § 260.88 Political activity. All inspectors and licensed samplers are forbidden, during the...

2011-10-01

96

Personnel recordkeeping requirements for CLIA-88.  

PubMed

Documented personnel files will be a requirement of the Clinical Laboratory Improvement Amendments of 1988 (CLIA-88) regulations. This documentation will help reduce laboratory errors and liability by clearly and completely defining the employee's duties and responsibilities. PMID:1635674

Voldish, K

1992-05-01

97

49 CFR 230.88 - Throttles.  

Code of Federal Regulations, 2010 CFR

...OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Steam Locomotives and Tenders Throttles and Reversing Gear § 230.88 Throttles. Throttles shall be maintained in safe and suitable condition for service, and efficient...

2010-10-01

98

49 CFR 230.88 - Throttles.  

Code of Federal Regulations, 2010 CFR

...OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Steam Locomotives and Tenders Throttles and Reversing Gear § 230.88 Throttles. Throttles shall be maintained in safe and suitable condition for service, and efficient...

2009-10-01

99

7 CFR 948.88 - Agents.  

Code of Federal Regulations, 2013 CFR

...SERVICE (MARKETING AGREEMENTS AND ORDERS; FRUITS, VEGETABLES, NUTS), DEPARTMENT OF AGRICULTURE IRISH POTATOES GROWN IN COLORADO Order Regulating Handling Miscellaneous Provisions § 948.88 Agents. The Secretary may, by designation in...

2013-01-01

100

40 CFR 88.203-94 - Abbreviations.  

Code of Federal Regulations, 2012 CFR

...Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES California Pilot Test Program § 88.203-94 Abbreviations. The abbreviations in subpart A of this part and in 40 CFR part 86...

2012-07-01

101

45 CFR 96.88 - Administrative costs.  

Code of Federal Regulations, 2011 CFR

... GENERAL ADMINISTRATION BLOCK GRANTS Low-income Home Energy Assistance Program § 96.88 Administrative costs...the cost of planning and administering the low-income home energy assistance program shall be 20 percent of...

2011-10-01

102

45 CFR 96.88 - Administrative costs.  

Code of Federal Regulations, 2012 CFR

... GENERAL ADMINISTRATION BLOCK GRANTS Low-income Home Energy Assistance Program § 96.88 Administrative costs...the cost of planning and administering the low-income home energy assistance program shall be 20 percent of...

2012-10-01

103

7 CFR 930.88 - Derogation.  

Code of Federal Regulations, 2013 CFR

...VEGETABLES, NUTS), DEPARTMENT OF AGRICULTURE TART CHERRIES GROWN IN THE STATES OF MICHIGAN, NEW YORK, PENNSYLVANIA, OREGON, UTAH, WASHINGTON, AND WISCONSIN Order Regulating Handling Miscellaneous Provisions § 930.88 Derogation. Nothing...

2013-01-01

104

Measurement of 14MeV neutron cross sections for 88Zr and 88Y  

Microsoft Academic Search

We have measured (n,2n) and (n,np+n,pn) cross sections for the radioactive nuclides 88Y and 88Zr. The results are, for the (n,2n) reaction on 88Y at 14.19+\\/-0.04 MeV, 1140+\\/-50 mb; and at 14.8+\\/-0.1 MeV, 1180+\\/-50 mb. The 87Y isomer ratios (mtotal) are 0.70+\\/-0.05 and 0.74+\\/-0.05, respectively. For 88Zr at 14.8+\\/-0.1 MeV, the (n,2n) cross section is 467+\\/-23 mb, and the (n,np+n,pn)

René J. Prestwood; Kimberly W. Thomas; David R. Nethaway; Norman L. Smith

1984-01-01

105

Spectroscopy of 88Y by the (p,d?) reaction  

NASA Astrophysics Data System (ADS)

Low-spin, high-excitation energy states in 88Y have been studied using the 89Y(p,d?) reaction. For this experiment a 25 MeV proton beam was incident upon a monoisotopic 89Y target. A silicon telescope array was used to detect deuterons, and coincident ? rays were detected using a germanium clover array. Most of the known low-excitation-energy low-spin states populated strongly via the (p,d) reaction mechanism are confirmed. Two states are seen for the first time and seven new transitions, including one which bypasses the two low-lying isomeric states, are observed.

Ross, T. J.; Beausang, C. W.; Hughes, R. O.; Scielzo, N. D.; Burke, J. T.; Allmond, J. M.; Angell, C. T.; Basunia, M. S.; Bleuel, D. L.; Casperson, R. J.; Escher, J. E.; Fallon, P.; Hatarik, R.; Munson, J.; Paschalis, S.; Petri, M.; Phair, L.; Ressler, J. J.

2012-12-01

106

Determining yttrium in plutonium by anion-exchange x-ray fluorescence  

SciTech Connect

This report describes a method for determining yttrium in plutonium using an anion-exchange separation and x-ray fluorescence. We add zirconium to the plutonium solution as an internal standard. We oxidize the plutonium to Pu + 4 and pass the solution through an anion-exchange column with 8M HCl. The Pu + 4 sorbs to the resin and the yttrium and zirconium pass through completely. We evaporate the eluate solution containing the yttrium and zirconium and transfer it to a 10-ml volumetric flask. We add a portion of this solution to an x-ray cell and measure the Ka x-ray line for both yttrium and zirconium. The ratio of yttrium to zirconium is then compared with standards. This method has a precision of 0.84% relative standard deviation for yttrium over a concentration range of 0.5 to 3.5 mg in a 10-ml volume. 1 ref., 2 figs., 2 tabs.

Martell, C.J.; Hansel, J.M.

1985-11-01

107

The High-Energy Transport Code HETC88  

SciTech Connect

An upgraded version, HETC88, of the previously available High-Energy Transport Code HETC is briefly described. In the upgraded code, the particle production model from hadron-nucleus nonelastic collisions at energies greater than 5 GeV has been revised. At nucleon and ion energies below 5 GeV, HETC88 is not different from the code previously available. In particular, provision is still made to allow neutrons with energies less than or equal to20 MeV to be transported by none of the available codes designed for low-energy neutron transport. Calculated results for the longitudinal distribution of the flux of neutrons with energy greater than or equal to40 KeV in the Tevatron tunnel when 900 GeV protons interact with N/sub 2/ in a warm section are presented and compared with experimental data. Some disagreements between the calculated and measured neutron flux are found. For 20 TeV protons incident on a large cylindrical iron target, calculated ''star'' density results from HETC88, FLUKA87, CASIM, and MARS10 are also compared. 22 refs., 3 figs.

Alsmiller, R.G. Jr.; Alsmiller, F.S.; Gabriel, T.A.; Hermann, O.W.; Barnes, J.M.

1989-01-01

108

Studies on the synthesis of europium activated yttrium oxide by wet-chemical method  

Microsoft Academic Search

Europium activated yttrium oxide phosphor powders (Y2O3:Eu3+) were prepared from yttrium–europium precursors obtained by wet-chemical method. With this purpose in view, precursors were prepared using the reagent simultaneous addition SimAdd technique from yttrium–europium nitrate and chloride as rare-earth supplier and urea, ammonium oxalate, ammonium carbonate and oxalic acid as precipitating agents. Precursors, obtained under controlled concentration, temperature and pH conditions,

Laura Muresan; Elisabeth-Jeanne Popovici; Rodica Grecu; Lucian Barbu Tudoran

2009-01-01

109

Solubility of yttrium in copper and its effect on the properties of leaded brasses  

Microsoft Academic Search

1.Additions of 0.02–0.1% yttrium enhance the plasticity of copper and its alloys.2.The solubility of yttrium in copper is less than 0.05% at 20°C.3.When yttrium is added the zone of cold deformability of LS74-3 alloy and the zone of hot working of LS59-1 alloy expand; this can be exploited to speed up the pressure shaping technology and increasing the satisfactory output

T. U. Duisemaliev; U. K. Duisemaliev

1993-01-01

110

Mass spectroscopic and ESR characterization of soluble yttrium-containing metallofullerenes YCââ and YâCââ  

Microsoft Academic Search

Solvent soluble, yttrium-containing fullerenes are extracted from yttrium\\/carbon soot produced by the carbon-arc fullerene generation method. An yttrium-graphite composite yields solvent extractable molecules such as YCââ and YâCââ as evidenced by a laser desorption time-of-flight (LD-TOF) mass spectroscopic analysis of the extracts. This is consistent with the very recent results by Smalley et al. where YCââ and YâCââ are prepared

Hisanori Shinohara; Hiroyasu Sato; Yahachi Saito; Masato Ohkohchi; Yoshinori Ando

1992-01-01

111

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

112

Formation of yttrium barium cuprate powder at low temperatures  

SciTech Connect

Yttrium barium cuprate can be formed at temperatures below 800{degrees}C from mixed oxides and carbonate if a low-oxygen-pressure atmosphere is used. This eliminates the formation of a high-oxygen-content nonsuperconducting phase which has been previously shown to form at lower temperatures. Reaction of barium carbonate and the oxides of copper and yttrium at temperatures as low as 750{degrees}C in reducing atmospheres is shown to form tetragonal YBa{sub 2}Cu{sub 3}O{sub x} with x about 6. This compound can then be oxidized by cooling in an oxidizing atmosphere to obtain the desired x value of about 7.

Lay, K.W. (Research and Development Center, General Electric Co., Schenectady, NY (US))

1989-04-01

113

Direct measurements of grain boundary sliding in yttrium-doped alumina bicrystals  

NASA Astrophysics Data System (ADS)

The behavior of grain boundary sliding in pure and yttrium-doped Al2O3 was directly measured at a high temperature, using bicrystal experiments. For this purpose, we fabricated Al2O3 bicrystals containing a random grain boundary with or without yttrium ions. High-resolution transmission electron microscopy observations and energy dispersive x-ray spectroscopy analyses showed that bicrystals were successfully joined at an atomic scale, and doped yttrium ions segregated along the grain boundaries. It was found by compressive creep tests that the grain boundary sliding rate was restrained by two orders of magnitude due to yttrium addition, as compared to that of undoped bicrystals.

Matsunaga, K.; Nishimura, H.; Muto, H.; Yamamoto, T.; Ikuhara, Y.

2003-02-01

114

9 CFR 88.2 - General information.  

Code of Federal Regulations, 2013 CFR

...PRODUCTS COMMERCIAL TRANSPORTATION OF EQUINES FOR SLAUGHTER § 88.2 General information...individual or other entity found to transport equines for slaughter is subject to the regulations...individual or other entity who transported the equines information regarding the business...

2013-01-01

115

45 CFR 88.1 - Purpose.  

Code of Federal Regulations, 2012 CFR

...PRACTICES IN VIOLATION OF FEDERAL LAW § 88.1 Purpose. The purpose of this part is to provide for the enforcement of the Church Amendments, 42 U.S.C. 300a-7, section 245 of the Public Health Service Act, 42 U.S.C. 238n, and the...

2012-10-01

116

45 CFR 88.1 - Purpose.  

Code of Federal Regulations, 2011 CFR

...PRACTICES IN VIOLATION OF FEDERAL LAW § 88.1 Purpose. The purpose of this part is to provide for the enforcement of the Church Amendments, 42 U.S.C. 300a-7, section 245 of the Public Health Service Act, 42 U.S.C. 238n, and the...

2011-10-01

117

40 CFR 88.201-94 - Scope.  

Code of Federal Regulations, 2012 CFR

...CONTINUED) CLEAN-FUEL VEHICLES California Pilot Test Program § 88.201-94...Implementation Plan revisions for the State of California and other states pursuant to compliance...manufacturers with sales in the State of California. [57 FR 60046, Dec. 17,...

2012-07-01

118

40 CFR 88.202-94 - Definitions.  

Code of Federal Regulations, 2012 CFR

...CONTINUED) CLEAN-FUEL VEHICLES California Pilot Test Program § 88.202-94...franchise agreements) in the State of California, including owners of covered fleets...production of vehicles for the state of California. This option can be revoked if...

2012-07-01

119

1987-88 Statewide Computer Survey Report.  

ERIC Educational Resources Information Center

This fifth annual survey of computers and their use in South Carolina schools covers the 1978-88 school years. A questionnaire inventoried computer equipment and software, and dealt with such issues as instructional and administrative uses of computers, and availability of funding. The forms were distributed to all South Carolina public school…

South Carolina Educational Television Network Columbia.

120

Tanner ‘88 and the television of politics  

Microsoft Academic Search

Using a 1988 Home Box Office (HBO) series as a point of departure this paper examines the state of mass?mediated politics. Examples from Tanner ‘88 reveal unmistakable signs of contemporary electoral campaigns ? stage management, monitored public opinion, and mythinformation. Pseudo?events replace actual political circumstances to create politically useful images. The consciousness industry, in creating almost universal commodification, has fused

Michael Hoover

1994-01-01

121

Sublattice Magnetization in Yttrium and Lutetium Iron Garnets  

Microsoft Academic Search

The temperature dependence of the a and d sublattice magnetization in yttrium iron garnet (YIG) and lutetium iron garnet (LuIG) has been observed by means of the NMR of Fe57 between 4 and 373°K, with special emphasis on the temperature range where the spin-wave theory is expected to hold. An analysis of these results in terms of the spin reversals

Roland Gonano; Earle Hunt; Horst Meyer

1967-01-01

122

Sol-gel synthesis and characterization of yttrium gallium garnets  

Microsoft Academic Search

Precursor powders for yttrium gallium garnet (Y3Ga5O12, YGG) were prepared by a simple sol-gel method based on the formation of metal chelates in aqueous solvents. A systematic study of sol-gel technique synthesized YGG samples is presented using different complexing agents. Six high-purity organic substances were used as complexing agents, namely, tartaric acid, 1,2-ethanediol, citric acid, ethylene diamine tetra-acetic acid (EDTA),

Asta Leleckaite; Sigita Urbonaite; Kaia Tõnsuaadu; Aivaras Kareiva

2005-01-01

123

Coating liposomes with yttrium basic carbonate: Making hybrid nanocapsules  

Microsoft Academic Search

Novel yttrium basic carbonate hybrid nanocapsules have been prepared using liposome templates. The method resorts to urea hydrolysis to increase the precipitation driving force of Y(OH)CO3?xH2O homogeneously. The head groups at the outer vesicle layer act as adsorption sites for hydrolyzing Y(III) ions, thus assisting heterogeneous nucleation. The criteria behind the synthesis, as well as the potentialities of the advanced

Martín G. Bellino; Alberto E. Regazzoni

2009-01-01

124

Thermal Decomposition of Lanthanide, Yttrium, and Scandium Oxalates and Carbonates  

NASA Astrophysics Data System (ADS)

Data concerning the thermal decomposition of lanthanide, yttrium, and scandium oxalates and carbonates are surveyed. The complexity of the process, the large number of stages involved, and the dependence of the composition of the intermediates in the thermal transformations on the experimental conditions is noted. Certain process characteristics have been discovered and it is concluded that the decomposition process depends on the ionic radius of the metal. The bibliography includes 83 references.

Sharov, Vyacheslav A.; Bezdenezhnykh, G. V.

1981-07-01

125

Coating liposomes with yttrium basic carbonate: making hybrid nanocapsules.  

PubMed

Novel yttrium basic carbonate hybrid nanocapsules have been prepared using liposome templates. The method resorts to urea hydrolysis to increase the precipitation driving force of Y(OH)CO(3)xH(2)O homogeneously. The head groups at the outer vesicle layer act as adsorption sites for hydrolyzing Y(III) ions, thus assisting heterogeneous nucleation. The criteria behind the synthesis, as well as the potentialities of the advanced procedure, are stressed. PMID:19251267

Bellino, Martín G; Regazzoni, Alberto E

2009-02-21

126

Outcome of erbium:yttrium aluminium garnet laser resurfacing treatments  

Microsoft Academic Search

Erbium:yttrium aluminium garnet (erbium:YAG) laser treatment was used to resurface skin abnormalities in patients suffering\\u000a from conditions that included epidermal naevi, tuberous sclerosis, angiofibromata, neurofibromatosis, and scarring caused\\u000a by acne or other means. Patients completed self-report questionnaires before their first laser test patch session, and again\\u000a approximately 4 months after one treatment, so that its success could be evaluated from the

R. P. Cole; D. Widdowson; J. C. Moore

2008-01-01

127

Monolayers and Langmuir–Blodgett films of yttrium stearate  

Microsoft Academic Search

In contrast to monolayers and Langmuir–Blodgett (LB) films of divalent metal salts of fatty acids, these films containing trivalent metal ions have not been studied enough yet. This work deals with the study of monolayers and LB films of yttrium stearate. The dependencies of monolayer and LB film compositions on subphase pH were obtained from pressure–area isotherms and Fourier transform

T. V Zotova; V. V Arslanov; I. A Gagina

1998-01-01

128

ACTIVE MEDIA. LASERS: Neodymium-doped laser yttrium oxide ceramics  

Microsoft Academic Search

We studied mechanical, optical, and lasing parameters of neodymium-doped yttrium oxide ceramics synthesised by using a new technology involving the laser synthesis of nanopowders and their magnetic pulsed compaction. The fracture toughness of ceramics to cracks and its microhardness were measured to be KIC = 0.9---1.4 MPa m1\\/2 and Hnu = 11.8 GPa, respectively. Ceramic samples sintered in the temperature

S. N. Bagaev; V. V. Osipov; M. G. Ivanov; V. I. Solomonov; V. V. Platonov; A. N. Orlov; A. V. Rasuleva; V. V. Ivanov; A. S. Kaigorodov; V. R. Khrustov; S. M. Vatnik; I. A. Vedin; A. P. Maiorov; E. V. Pestryakov; A. V. Shestakov; A. V. Salkov

2008-01-01

129

Granulometric composition of a luminophor based on yttrium oxide  

Microsoft Academic Search

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

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

1986-01-01

130

Dielectric properties and electrical conduction in yttrium iron garnet (YIG)  

Microsoft Academic Search

The dielectric properties (dielectric constant and loss) of a single crystal of yttrium iron garnet (Y3Fe5O12) were measured in the temperature range 77–725 K and in the frequency range 100 Hz-1 MHz. AC conductivity was derived from\\u000a dielectric constant and loss. DC conductivity was measured in the temperature range 30–725 K. Thermoelectric power (TEP) was\\u000a measured from 77–800 K. On

Lalitha Sirdeshmukh; K Krishna Kumar; S Bal Laxman; A Rama Krishna; G Sathaiah

1998-01-01

131

Magnetic Aftereffects in Single and Polycrystalline Yttrium Iron Garnet  

Microsoft Academic Search

Magnetic aftereffect (MAE) measurements on single and polycrystalline yttrium iron garnet, Y3Fe5O12, have been carried out from 4.4 to 450 K by means of an LC-oscillator technique. In non-oriented and oriented single crystal samples three processes around 60, 130 and 250 K are observed. Similar peaks appear in polycrystalline samples which had been sintered in air or CO2 atmospheres. Following

L. Torres; F. Walz; J. Iñiguez; H. Kronmüller

1997-01-01

132

Superconducting microstrip resonator with yttrium iron garnet single crystals  

Microsoft Academic Search

A magnetically tunable microstrip superconducting resonator using an yttrium-iron-garnet (YIG) single crystal was demonstrated experimentally. Tunability of 200 MHz at a center frequency of 5.3 GHz was observed, and a quality factor of 965 with minimum insertion loss of 19.5 dB was measured for a half-wavelength microstrip line consisting of a YIG-YBCO-MgO composite structure. The dispersion relation of the resonator

Takeshi Fukusako; Makoto Tsutsumi

1997-01-01

133

Electrical properties of yttrium iron garnet at high temperatures  

Microsoft Academic Search

The dc electrical conductivity (sigma) and the Seebeck coefficient (alpha) have been measured on n- and p-type single crystals of yttrium iron garnet (YIG) in the temperature range 600-1500 K. The temperature dependence of sigma and alpha at an oxygen partial pressure (PO2) of 1 atm shows extrinsic behavior of sigma for both n- and p-type samples with a thermal

P. K. Larsen; R. Metselaar

1976-01-01

134

Nuclear Bragg diffraction of synchrotron radiation in yttrium iron garnet  

Microsoft Academic Search

Monochromatization of synchrotron radiation down to about 10 neV at an energy of 14.4 keV has been achieved by double nuclear Bragg diffraction from (Fe-57)-yttrium iron garnet single-crystal films set for the electronically forbidden 200 plane-type reflection. The monochromatized gamma quanta have been analyzed with respect to time delay and capability of resonance absorption. By setting appropriate energy and time

E. Gerdau; R. Rueffer; H. Winkler; W. Tolksdorf; C. P. Klages; J. P. Hannon

1985-01-01

135

Anisotropy and magnetostriction of cobalt-substituted yttrium iron garnet  

Microsoft Academic Search

The anisotropy, magnetostriction, and ferromagnetic resonance linewidth of cobalt-substituted yttrium iron garnets of composition Y3Fe5-x-yCoxGeyO12 have been investigated by means of ferromagnetic resonance at 9.15 GHz in the temperature range 4.2<=T<=500 K. The impurities, the valence states, and the site distribution of the cobalt ions in the measured crystals have been determined by chemical analysis, optical absorption, and spin-echo measurements.

P. Hansen; W. Tolksdorf; R. Krishnan

1977-01-01

136

Nonstoichiometry and electronic defects in yttrium iron garnet  

Microsoft Academic Search

Results are presented of a thermogravimetrical analysis of yttrium iron garnet, Y3Fe5O12-delta, in the temperature range 950-1270°C. From these measurements the oxygen vacancy concentration delta is obtained for partial oxygen pressures between 1 and 10-5 atm. The data can be fitted with a relation delta = A exp(-E\\/kT). Values of A and E are given for different values of PO2.

R. Metselaar; M. A. H. Huyberts

1977-01-01

137

Microstrip line filters using yttrium iron garnet film  

Microsoft Academic Search

The yttrium iron garnet (YIG) film microstrip line was fabricated by using 40-?m-thick film with a width of 20 mm and a length of 10 mm along with a 0.7-mm-wide microstrip and was magnetized in a transverse direction to the wave propagation. Sharp notch characteristics of more than 30 dB with few dB insertion loss were observed experimentally with a

Makoto Tsutsumi; Satoshi Tamura

1992-01-01

138

Tunable negative index metamaterial using yttrium iron garnet  

Microsoft Academic Search

A magnetic field tunable, broadband, low-loss, negative refractive index metamaterial is fabricated using yttrium iron garnet (YIG) and a periodic array of copper wires. The tunability is demonstrated from 18 to 23GHz under an applied magnetic field with a figure of merit of 4.2GHz\\/kOe. The tuning bandwidth is measured to be 5GHz compared to 0.9GHz for fixed field. We measure

Yongxue He; Peng He; Soack Dae Yoon; P. V. Parimi; F. J. Rachford; V. G. Harris; C. Vittoria

2007-01-01

139

Redox processes in highly yttrium-doped barium titanate  

NASA Astrophysics Data System (ADS)

The changes of microstructure occurring during oxidation of the reduced form of yttrium-doped barium titanate (Ba1-xYxTi1-x4+Tix3+O3) have been studied. Samples were sintered under reduction conditions at PO2=10-4Pa and oxidized by annealing at high temperatures (1150 and 1350 °C) in air. Depending on yttrium concentration, the oxidation of the reduced form of the yttrium-doped BaTiO3 caused precipitation of the phase Ba6Ti17O40 or the phases Ba6Ti17O40 and Y2Ti2O7. The precipitates had well-defined orientational relationships with the perovskite matrix. Oxidation of the reduced form of doped barium titanate results in formation of the phase Ba1-xYxTi1-x/44+(VTi'''')x/4O3 responsible for increase in the resistance of outer grain layers, which lie between grain boundaries and grain.

Belous, Anatolii; v'Yunov, Oleg; Kovalenko, Leonid; Makovec, Darko

2005-05-01

140

Redox processes in highly yttrium-doped barium titanate  

SciTech Connect

The changes of microstructure occurring during oxidation of the reduced form of yttrium-doped barium titanate (Ba{sub 1-x}Y{sub x}{sup ?}Ti{sub 1-x}{sup 4+}Ti{sub x}{sup 3+}O{sub 3}) have been studied. Samples were sintered under reduction conditions at P{sub O{sub 2}}=10{sup -4}Pa and oxidized by annealing at high temperatures (1150 and 1350 deg. C) in air. Depending on yttrium concentration, the oxidation of the reduced form of the yttrium-doped BaTiO{sub 3} caused precipitation of the phase Ba{sub 6}Ti{sub 17}O{sub 40} or the phases Ba{sub 6}Ti{sub 17}O{sub 40} and Y{sub 2}Ti{sub 2}O{sub 7}. The precipitates had well-defined orientational relationships with the perovskite matrix. Oxidation of the reduced form of doped barium titanate results in formation of the phase Ba{sub 1-x}Y{sub x}{sup ?}Ti{sub 1-x/4}{sup 4+}(V{sub Ti}{sup -}bar ){sub x/4}O{sub 3} responsible for increase in the resistance of outer grain layers, which lie between grain boundaries and grain.

Belous, Anatolii [Department of Solid State Chemistry, V.I. Vernadskii Institute of General and Inorganic Chemistry, Ukrainian National Academy of Sciences, Institute of General and Inorganic Chemistry, 32/42, Palladin Ave, 03680 Kyiv 142 (Ukraine); V'yunov, Oleg [Department of Solid State Chemistry, V.I. Vernadskii Institute of General and Inorganic Chemistry, Ukrainian National Academy of Sciences, Institute of General and Inorganic Chemistry, 32/42, Palladin Ave, 03680 Kyiv 142 (Ukraine)]. E-mail: vyunov@ionc.kar.net; Kovalenko, Leonid [Department of Solid State Chemistry, V.I. Vernadskii Institute of General and Inorganic Chemistry, Ukrainian National Academy of Sciences, Institute of General and Inorganic Chemistry, 32/42, Palladin Ave, 03680 Kyiv 142 (Ukraine); Makovec, Darko [Jozef Stefan Institute, Ljubljana (Slovenia)

2005-05-15

141

Nucleoporin 88 (Nup88) is regulated by hypertonic stress in kidney cells to retain the transcription factor tonicity enhancer-binding protein (TonEBP) in the nucleus.  

PubMed

Antibody microarray technology identified Nup88 (nucleoporin 88) as a highly up-regulated protein in response to osmotic stress in inner medullary collecting duct (IMCD3) cells. Changes in expression were verified by Western blot and quantitative PCR for protein and message expression. In mouse and human kidney, Nup88 expression was substantial in the papilla, whereas it was nearly absent in the cortex. Furthermore, the expression of Nup88 increased 410.4 +/- 22% in the papilla of mice after 36 h of thirsting. Nup88 protein expression in IMCD3 cells was significantly up-regulated in the first 8 h following exposure to acute osmotic stress, indicating that Nup88 is an early response protein. To define the function of Nup88 in the osmotic stress response, the transcription factor associated with hypertonicity, tonicity enhancer-binding protein (TonEBP), was cloned upstream of the green fluorescent protein. Employing this construct, we demonstrate that silencing Nup88 in IMCD3 cells acutely stressed to hypertonic conditions reduces nuclear retention of TonEBP, resulting in a substantial blunting in transcription of important osmotic stress response target genes and reduced cell viability. Finally, we show that in IMCD3 cells, nuclear export of TonEBP under isotonic conditions involves CRM-1 but under hypertonic stress is CRM1-independent. Our data, therefore, suggest that Nup88 is up-regulated in response to hypertonic stress and acts to retain TonEBP in the nucleus, activating transcription of critical osmoprotective genes. PMID:18606815

Andres-Hernando, Ana; Lanaspa, Miguel A; Rivard, Christopher J; Berl, Tomas

2008-07-07

142

21 CFR 312.88 - Safeguards for patient safety.  

Code of Federal Regulations, 2013 CFR

... 312.88 Section 312.88 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF...88 Safeguards for patient safety. All of the safeguards incorporated...the requirements of IND safety reports (§ 312.32), safety...

2013-04-01

143

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

144

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

145

40 CFR 745.88 - Recognized test kits.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Recognized test kits. 745.88 Section 745.88 Protection...Renovation § 745.88 Recognized test kits. (a) Effective June 23, 2008, EPA recognizes the test kits that have been determined by...

2013-07-01

146

40 CFR 745.88 - Recognized test kits.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Recognized test kits. 745.88 Section 745.88 Protection...Renovation § 745.88 Recognized test kits. (a) Effective June 23, 2008, EPA recognizes the test kits that have been determined by...

2010-07-01

147

40 CFR 745.88 - Recognized test kits.  

Code of Federal Regulations, 2010 CFR

...2009-07-01 false Recognized test kits. 745.88 Section 745.88 Protection...Renovation § 745.88 Recognized test kits. (a) Effective June 23, 2008, EPA recognizes the test kits that have been determined by...

2009-07-01

148

Atomistic computer simulations of yttrium iron garnet as an approach to studying its defect chemistry: Extrinsic defects  

Microsoft Academic Search

We report results of atomistic simulation studies concerning the incorporation of extrinsic defects in yttrium iron garnet crystals. We calculate defect formation energies in order to determine the most favorable impurity incorporation mechanisms in yttrium iron garnet.

H. Donnerberg; C. R. A. Catlow

1994-01-01

149

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

Code of Federal Regulations, 2013 CFR

...Patents, copyrights, inventions, and publications. 1230.88 Section 1230.88...Patents, copyrights, inventions, and publications. Any patents, copyrights, trademarks, inventions, or publications developed through the use...

2013-01-01

150

Radioimmunotherapy for non-Hodgkin's lymphoma with yttrium 90 ibritumomab tiuxetan.  

PubMed

The increasing incidence of non-Hodgkin's lymphoma (NHL), coupled with the lack of optimal treatment options, has prompted the development of novel treatments. Of these, radioimmunotherapy is one of the most promising. Two of the radiolabeled monoclonal antibody therapies being studied in the treatment of NHL are yttrium 90 (90Y) ibritumomab tiuxetan and iodine 131 (131I) tositumomab. The radionuclides 90Y and 131I emit beta radiation; 131I also emits gamma radiation, thus requiring more elaborate precautionary measures to limit radiation exposure. The monoclonal antibody portions of the drugs target the CD20 surface antigen that is present on the majority of B-cell lymphomas, resulting in direct radiation to the targeted cells, as well as indirect targeting of adjacent cells (known as the crossfire effect). Clinical trials of 90Y ibritumomab tiuxetan in patients with NHL have produced promising results. The safe and effective use of radioimmunotherapy requires a multidisciplinary team approach in which nurses play a central role. PMID:11998607

Hendrix, Carolyn S; de Leon, Cristina; Dillman, Robert O

151

Nuclear Data Sheets for A = 88  

SciTech Connect

Experimental data on ground- and excited-state properties for all known nuclei with mass number A = 88 have been compiled and evaluated. States populated in radioactive decay, as well as in nuclear reactions, have been considered. For these nuclei, level and decay schemes, as well as tables of nuclear properties, are given. This work supersedes the 1988 evaluation by H.-W. Muller (1988Mu09)

Mukherjee, G. [Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata 700064 (India); Sonzogni, A.A. [National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA (United States)

2005-06-01

152

Selective encapsulation of the carbides of yttrium and titanium into carbon nanoclusters  

Microsoft Academic Search

Characterization of the arc-discharge deposits at the cathode from anodes containing yttrium oxide and titanium by transmission electron microscopy and x-ray diffraction shows different results with respect to an encapsulation of the metal carbides into carbon clusters. Yttrium carbide is encapsulated into carbon nanoclusters in a crystalline phase. The formation of titanium carbide, on the other hand, preempts the formation

Supapan Seraphin; Dan Zhou; Jun Jiao; James C. Withers; Raouf Loutfy

1993-01-01

153

Optically transparent ceramics based on yttrium oxide using carbonate and alkoxy precursors  

Microsoft Academic Search

Methods for producing optically transparent ceramic materials based on Y2O3 using carbonate and alkoxy precursors are considered. It is established that ceramic synthesized from yttrium isopropylate\\u000a has better optical parameters than ceramics based on yttrium carbonate under equal heat treatment and firing regimes.

A. V. Belyakov; D. O. Lemeshev; E. S. Lukin; G. P. Val’nin; E. E. Grinberg

2006-01-01

154

Preparation and Characterization of Porous Yttrium Oxide Powders with High Specific Surface Area  

Microsoft Academic Search

The porous cubic yttrium oxides with high specific surface area were prepared by the explosive decomposition of yttrium nitrate and its complex formed with methyl salicylate. The specific surface area and properties of powders synthesized at various temperatures were characterized using BET, X-ray diffraction (XRD), infrared spectra (IR), and scanning electron microscopy (SEM). The results indicate that the highest specific

Yongxiu Li; Xiaoyun Lin; Yizheng Wang; Junming Luo; Weili Sun

2006-01-01

155

Aberrant Inflammatory Response to Streptococcus pyogenes in Mice Lacking Myeloid Differentiation Factor 88  

PubMed Central

Several in vitro studies have emphasized the importance of toll-like receptor/myeloid differentiation factor 88 (MyD88) signaling in the inflammatory response to Streptococcus pyogenes. Since the extent of inflammation has been implicated in the severity of streptococcal diseases, we have examined here the role of toll-like receptor/MyD88 signaling in the pathophysiology of experimental S. pyogenes infection. To this end, we compared the response of MyD88-knockout (MyD88?/?) after subcutaneous inoculation with S. pyogenes with that of C57BL/6 mice. Our results show that MyD88?/? mice harbored significantly more bacteria in the organs and succumbed to infection much earlier than C57BL/6 animals. Absence of MyD88 resulted in diminished production of inflammatory cytokines such as interleukin-12, interferon-?, and tumor necrosis factor-? as well as chemoattractants such as monocyte chemotactic protein-1 (MCP-1) and Keratinocyte-derived chemokine (KC), and hampered recruitment of effector cells involved in bacterial clearance (macrophages and neutrophils) to the infection site. Furthermore, MyD88?/? but not C57BL/6 mice exhibited a massive infiltration of eosinophils in infected organs, which can be explained by an impaired production of the regulatory chemokines, gamma interferon-induced monokine (MIG/CXCL9) and interferon-induced protein 10 (IP-10/CXCL10), which can inhibit transmigration of eosinophils. Our results indicate that MyD88 signaling targets effector cells to the site of streptococcal infection and prevents extravasation of cells that can induce tissue damage. Therefore, MyD88 signaling may be important for shaping the quality of the inflammatory response elicited during infection to ensure optimal effector functions.

Loof, Torsten G.; Goldmann, Oliver; Gessner, Andre; Herwald, Heiko; Medina, Eva

2010-01-01

156

The WSR-88D and the WSR-88D Operational Support Facility.  

NASA Astrophysics Data System (ADS)

The Weather Surveillance Radar-1988 Doppler (WSR-88D) System is the product of the Next Generation Weather Radar (NEXRAD) program, a joint effort of the U.S. Departments of Commerce, Defense, and Transportation. WSR-88D Systems meet the common needs of the three agencies and are being installed across the United States and at selected overseas sites. These systems provide Doppler capabilities, increased receiver sensitivity, and real-time display of base and derived products that will enable forecasters to improve the detection of and give greater advanced warning of severe weather events. Many nonsevere weather and hydrological applications are also expected.WSR-88D Systems will be modified and enhanced during their operational life to meet changing requirements, technological advancements, and improved understanding of the application of these systems to real-time operations. The NEXRAD agencies established the Operational Support Facility (OSF) to provide centralized WSR-88D operator training and software, maintenance, and engineering support.This paper provides an overview of the NEXRAD program, the WSR-88D System, and the role of the OSF in supporting the WSR-88D and its users. Examples of some of the products are also presented.

Crum, Timothy D.; Alberty, Ron L.

1993-09-01

157

Structural studies of the deuterides of carbon containing yttrium alloys  

Microsoft Academic Search

The present work describes a structural characterization of the yttrium–carbon compounds, Y2C and YCoC, and their corresponding deuterides using temperature desorption spectroscopy (TDS) and high-resolution powder X-ray and neutron diffraction. Carbon atoms orderly occupy 1\\/3 (YCoC) or 1\\/2 (Y2C) of the available octahedra, Y4Co2 and Y6, respectively. Strong Y–C interactions lead to the ‘shrinking’ of these C-filled sites, with the

J. P. Maehlen; V. A. Yartys; B. C. Hauback

2003-01-01

158

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

159

Enhanced spin pumping at yttrium iron garnet/Au interfaces  

SciTech Connect

Spin injection across the ferrimagnetic insulator yttrium iron garnet (YIG)/normal metal Au interface was studied using ferromagnetic resonance. The spin mixing conductance was determined by comparing the Gilbert damping parameter {alpha} in YIG/Au and YIG/Au/Fe heterostructures. The main purpose of this study was to correlate the spin pumping efficiency with chemical modifications of the YIG film surface using in situ etching and deposition techniques. By means of Ar{sup +} ion beam etching, one is able to increase the spin mixing conductance at the YIG/Au interface by a factor of 5 compared to the untreated YIG/Au interface.

Burrowes, C.; Heinrich, B.; Kardasz, B.; Montoya, E. A.; Girt, E. [Physics Department, Simon Fraser University, 8888 University Dr., Burnaby, British Columbia V5A 1S6 (Canada); Sun Yiyan; Song, Young-Yeal; Wu Mingzhong [Physics Department, Colorado State University, Fort Collins, Colorado 80523 (United States)

2012-02-27

160

Structure and AC conductivity of nanocrystalline Yttrium oxide thin films  

Microsoft Academic Search

Yttrium oxide (Y2O3) thin films were grown at substrate temperatures (Ts) ranging from room temperature (RT) to 500°C and their structural and electrical properties were evaluated. The results indicate that Y2O3 films grown at RT-100°C were amorphous (a-Y2O3). Y2O3 films began to show cubic phase (c-Y2O3) at Ts=200°C. The average grain size varies from 5 to 40nm as a function

V. H. Mudavakkat; M. Noor-A-Alam; K. Kamala Bharathi; S. Alfaify; A. Dissanayake; A. Kayani; C. V. Ramana

2011-01-01

161

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

162

Magnetism in Mn doped yttrium nitride: First-principles calculations  

NASA Astrophysics Data System (ADS)

The magnetism and aggregation trends in 25% and 12.5% Mn doped yttrium nitride (YN) have been investigated using the first-principles calculations. We demonstrate that the ferromagnetic delta doping is the ground state in higher concentration Mn doped YN, and the ferromagnetic homogeneous half-delta doping is the ground state in lower concentration Mn half-delta-doped YN. The latter shows ferromagnetic stabilization energy of 424.8 meV/Mn-Mn pair, which is substantially higher than many other compound semiconductor based magnetic semiconductors. Finally, we anticipate the potential spintronics application of Mn doped YN.

Jia, Xingtao; Yang, Wei; Qin, Minghui

2008-12-01

163

Anisotropy and Magnetostriction of Iridium-Substituted Yttrium Iron Garnet  

Microsoft Academic Search

The anisotropy, magnetostriction, and linewidth of iridium-substituted yttrium iron garnet single crystals of the composition Y3-xAxFe5-y- zIryBzO12- deltaFdelta (A=Ca+2,Pb2+ and B=Fe2+,Si4+,Zn2+) have been investigated by means of ferromagnetic resonance. Chemical-analysis data of Ir, Zn, Ca and of the impurities Pb, Si, and F are given for all crystals. The anisotropy and magnetostriction measurements were carried out at 9.15 GHz in

P. Hansen; J. Schuldt; W. Tolksdorf

1973-01-01

164

Yttrium-90 -- current status, expected availability and applications of a high beta energy emitter.  

PubMed

Yttrium-90 ((90)Y, T(1/2) 64.14 h) is a key example of a high beta energy-emitting radionuclide which is available from the strontium-90 ((90)Sr)/(90)Y radionuclide generator system. Clinical uses of (90)Y-labeled radiopharmaceutical agents have been pursued for many years and many applications have proven to be clinical effective. These most notably include the application of 90Y-labeled antibodies for a variety of applications such as for effective treatment of non-Hodgkin's lymphoma. One of the major advantages for use of (90)Y is ready availability from the very long-lived (90)Sr parent (T(1/2) 28.78 y). Because of the importance of maintaining generator performance and minimizing parent breakthrough, this paper describes development, use and quality control of both high capacity cation adsorption-type and electrochemical generator systems. In addition, the preparation and targeting to tumors in mice of DOTA-conjugated Nimotuzamab (h-R3) antibody which recognizes the external domain of the EPFR antibody radiolabeled with (90)Y obtained from the electrochemical generator is also described. As a key example for clinical applications of (90)Y, the use of (90)Y-labeled biotin for intra-operative pre-targeting for radionuclide therapy (IART®) of breast cancer is also described. PMID:22697484

Montaña, R Leyva; González, I Hernández; Ramirez, A Alberti; Garaboldi, L; Chinol, M

2012-07-01

165

Optical Feshbach Resonances in ^88Sr  

NASA Astrophysics Data System (ADS)

Recent proposals have shown that quantum degenerate gases of alkaline earth atoms can be used for a number of novel quantum computing and quantum simulation experiments [1]. Strontium seems to be a good candidate for such experiments because of the precise control and high-resolution spectroscopy demonstrated by optical lattice clocks [2]. Unfortunately, the small scattering length of ^88Sr is not amenable to evaporative cooling techniques that are usually used to reach quantum degeneracy [3,4]. Furthermore, increasing the scattering length of alkaline earths with a magnetic Feshbach resonance is not possible due to their spinless electronic ground state configuration. However, recent theoretical and experimental work suggests the possibility of changing scattering lengths in alkaline earths with laser light [5]. Using this optical Feshbach resonance near strontium's narrow ^1S0 ->^3P1 intercombination transition might allow its scattering length to be controlled without significant atom loss. We report our progress in demonstrating an optical Feshbach resonance in ^88Sr. [1] A.J. Daley et al., Phys. Rev. Lett. 101, 170504 (2008) [2] G.K. Campbell et al., Science 324, 360 (2009) [3] S. Stellmer et al., Phys. Rev. Lett. 103, 200401 (2009) [4] Y.N. Martinez de Esobar et al., Phys. Rev. Lett. 103, 200402 (2009) [5] T. Zelevinsky et al., Phys. Rev. Lett 96, 203201 (2006)

Nicholson, Travis; Blatt, Sebastian; Bloom, Benjamin; Ye, Jun

2010-03-01

166

Synthesis and biological evaluation of biotin conjugates of (±)-(4bS,8aR,10aS)-10a-ethynyl-4b,8,8-trimethyl-3,7-dioxo-3,4b,7,8,8a,9,10,10a-octahydro-phenanthrene-2,6-dicarbonitrile, an activator of the Keap1/Nrf2/ARE pathway, for the isolation of its protein targets.  

PubMed

The tricycle 1 ((±)-(4bS,8aR,10aS))-10a-ethynyl-4b,8,8-trimethyl-3,7-dioxo-3,4b,7,8,8a,9,10,10a-octahydrophenanthrene-2,6-dicarbonitrile), a potent activator of the Keap1/Nrf2/ARE pathway, has the potential to be a first in class drug for the treatment of diabetic nephropathy. To identify the protein targets for the development of 1, the (1:1)-diasteromeric mixture of biotinylated tricycles 3a and 3b were designed and synthesized. For the synthesis of 3a and 3b, a new important precursor, hydroxylated tricycle (±)-16 was synthesized from 4 by a C1 ?-methyl group oxidation protocol, which involves cyclopalladation of the C1 ?-methyl group from a C2-oxime. For the induction of the phase 2 cytoprotective enzyme NQO1 in Hepa1c1c7 murine hepatoma cells, the diasteromeric mixture 3a and 3b shows high potency (CD, 75nM) although this potency is lower than that of 1 and 16. Thus, biotinylated tricycles 3a and 3b may be promising tools for the isolation of the protein targets of 1. PMID:24018193

Saito, Akira; Higgins, Maureen; Zheng, Suqing; Li, Wei; Ojima, Iwao; Dinkova-Kostova, Albena T; Honda, Tadashi

2013-08-21

167

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

2013-07-03

168

Correlations of the stability, static dipole polarizabilities, and electronic properties of yttrium clusters.  

PubMed

Static dipole polarizabilities for the ground-state geometries of yttrium clusters (Yn, n < or = 15) are investigated by using the numerically finite field method in the framework of density functional theory. The structural size dependence of electronic properties, such as the highest occupied molecular orbital-lowest occupied molecular orbital (HOMO-LUMO) gap, ionization energy, electron affinity, chemical hardness and softness, etc., has been determined for yttrium clusters. The energetic analysis, minimum polarizability principle, and principle of maximum hardness are used to characterize the stability of yttrium clusters. The correlations of stability, static dipole polarizabilities, and electronic properties are analyzed especially. The results show that static polarizability and electronic structure can reflect obviously the stability of yttrium clusters. The static polarizability per atom decreases slowly with an increase in the cluster size and exhibits a local minimum at the magic number cluster. The ratio of the mean static polarizability to the HOMO-LUMO gap has a much lower value for the most stable clusters. The static dipole polarizabilities of yttrium clusters are highly dependent on their electronic properties and are also partly related to their geometrical characteristics. A large HOMO-LUMO gap of an yttrium cluster usually corresponds to a large dipole moment. Strong correlative relationships of the ionization potential, softness, and static dipole polarizability are observed for yttrium clusters. PMID:19722531

Li, Xi-Bo; Wang, Hong-Yan; Lv, Ran; Wu, Wei-Dong; Luo, Jiang-Shan; Tang, Yong-Jian

2009-09-24

169

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

2013-08-01

170

An Analysis of the "Blizzard of '88".  

NASA Astrophysics Data System (ADS)

A collection of detailed surface weather observations is used to construct an analysis of the legendary "Blizzard of '88," an intense cyclone that was accompanied by unusually heavy snowfall, high winds and cold temperatures across the northeastern United States from 11 to 14 March 1888. The analysis follows the cyclone from genesis along a slow-moving frontal system, through rapid development and occlusion along the Middle Atlantic and southern New England coasts. Unusual aspects of the cyclone are highlighted. These include the limited areal extent of heavy snow accumulations, the establishment of very cold air across western New England and the Middle Atlantic states, a persistent stationary frontal zone across central New England that separated frigid continental air from maritime air, and the slow movement and rapid warming associated with the decay of the storm.

Kocin, Paul J.

1983-11-01

171

Mass spectroscopic characterization of yttrium-containing metallofullerene YC82 using resonant laser ablation  

Microsoft Academic Search

In this paper, resonant laser ablation time-of-flight mass spectroscopy (RLA-TOF-MS) has been used to mass spectroscopic characterization of yttrium-containing fullerenes. Solvent soluble, yttrium-containing fullerenes are extracted from yttrium\\/carbon soot produced by the carbon-arc fullerene generation method. The RLA-TOF mass spectra indicate the presence of YC82. The metallofullerences YC60, YC70, Y2C82 and a series of Y2C2n are not observed by RLA-TOF-MS.

Shiliang Wang; Jiahe Tian; Songtao Dai; Dieyan Chen; Chuping Luo; Haisong Tan; Liangbing Gan; Chunhui Huang

1995-01-01

172

Treatment of exhaust fluorescent lamps to recover yttrium: Experimental and process analyses  

SciTech Connect

Highlights: > Recovery of yttrium from spent fluorescent lamps by sulphuric acid leaching. > The use of sulphuric acid allows to reduce calcium dissolutions. > Main contaminant of fluorescent powder are Si, Pb, Ca and Ba. > Hydrated yttrium oxalate, recovered by selective precipitation, is quite pure (>90%). > We have studied the whole process for the treatment of dangerous waste (plant capability). - Abstract: The paper deals with recovery of yttrium from fluorescent powder coming from dismantling of spent fluorescent tubes. Metals are leached by using different acids (nitric, hydrochloric and sulphuric) and ammonia in different leaching tests. These tests show that ammonia is not suitable to recover yttrium, whereas HNO{sub 3} produces toxic vapours. A full factorial design is carried out with HCl and H{sub 2}SO{sub 4} to evaluate the influence of operating factors. HCl and H{sub 2}SO{sub 4} leaching systems give similar results in terms of yttrium extraction yield, but the last one allows to reduce calcium extraction with subsequent advantage during recovery of yttrium compounds in the downstream. The greatest extraction of yttrium is obtained by 20% w/v S/L ratio, 4 N H{sub 2}SO{sub 4} concentration and 90 deg. C. Yttrium and calcium yields are nearly 85% and 5%, respectively. The analysis of variance shows that acid concentration alone and interaction between acid and pulp density have a significant positive effect on yttrium solubilization for both HCl and H{sub 2}SO{sub 4} medium. Two models are empirically developed to estimate yttrium and calcium concentration during leaching. Precipitation tests demonstrate that at least the stoichiometric amount of oxalic acid is necessary to recover yttrium efficiently and a pure yttrium oxalate n-hydrate can be produced (99% grade). The process is economically feasible if other components of the fluorescent lamps (glass, ferrous and non-ferrous scraps) are recovered after the equipment dismantling and valorized, besides the cost that is usually paid to recycling companies for collection, treatment or final disposal of such fluorescent powders.

De Michelis, Ida, E-mail: ida.demichelis@univaq.it [University of L'Aquila, Department of Chemistry, Chemical Engineering and Materials - Ex-Optimes Loc., Campo di Pile, 67100 L'Aquila (Italy); Ferella, Francesco, E-mail: francesco.ferella@univaq.it [University of L'Aquila, Department of Chemistry, Chemical Engineering and Materials - Ex-Optimes Loc., Campo di Pile, 67100 L'Aquila (Italy); Varelli, Ennio Fioravante [University of L'Aquila, Department of Chemistry, Chemical Engineering and Materials - Ex-Optimes Loc., Campo di Pile, 67100 L'Aquila (Italy); Veglio, Francesco, E-mail: francesco.veglio@univaq.it [University of L'Aquila, Department of Chemistry, Chemical Engineering and Materials - Ex-Optimes Loc., Campo di Pile, 67100 L'Aquila (Italy)

2011-12-15

173

Mass spectroscopic characterization of yttrium-containing metallofullerene YC82 using resonant laser ablation  

SciTech Connect

In this paper, resonant laser ablation time-of-flight mass spectroscopy (RLA-TOF-MS) has been used to mass spectroscopic characterization of yttrium-containing fullerenes. Solvent soluble, yttrium-containing fullerenes are extracted from yttrium/carbon soot produced by the carbon-arc fullerene generation method. The RLA-TOF mass spectra indicate the presence of YC82. The metallofullerences YC60, YC70, Y2C82 and a series of Y2C2n are not observed by RLA-TOF-MS. This result is consistent with the ESR spectral result reported by Shinohara et al.

Wang Shiliang; Tian Jiahe; Dai Songtao; Chen Dieyan; Luo Chuping; Tan Haisong; Gan Liangbing; Huang Chunhui [Laser Single Atom Detection Laboratory, Department of Physics, Tsinghua University, Beijing 100084 (China); State Key Laboratory of Rare Earth Material Chemistry and Applications, Peking University, Beijing 100871 (China)

1995-04-01

174

Yttrium radiosynoviorthesis in the treatment of knee arthritis in rheumatoid arthritis: a systematic review  

PubMed Central

OBJECTIVE—To consider the question: How strong is the evidence in favour of yttrium synovectomy in chronic knee arthritis in patients with rheumatoid arthritis in comparison with placebo and intra-articular steroid treatment??METHODS—A systematic review of the literature was performed using Medline and the Embase database.?RESULTS—Initially, seven papers were identified, but only two met the inclusion criteria. Neither study showed evidence in favour of yttrium synovectomy.?CONCLUSION—From the point of view of evidence based medicine it should be seriously questioned whether yttrium synovectomy deserves a place in clinical practice.??

Heuft-Dorenbosch, L.; de Vet, H. C W; van der Linden, S.

2000-01-01

175

40 CFR 725.88 - Uses of a microorganism.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Uses of a microorganism. 725.88 Section 725...REQUIREMENTS AND REVIEW PROCESSES FOR MICROORGANISMS Confidentiality and Public...Information § 725.88 Uses of a microorganism. (a) Assertion of...

2013-07-01

176

21 CFR 520.88 - Amoxicillin oral dosage forms.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 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...

2013-04-01

177

21 CFR 520.88c - Amoxicillin trihydrate oral suspension.  

Code of Federal Regulations, 2013 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)...

2013-04-01

178

28 CFR 115.88 - Data review for corrective action.  

Code of Federal Regulations, 2013 CFR

...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 Data review for corrective...

2013-07-01

179

40 CFR Appendix - Tables to Subpart B of Part 88  

Code of Federal Regulations, 2012 CFR

...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES California Pilot Test Program State opt-in for the California Pilot Test Program. Pt. 88, Subpt. B, Tables Tables to Subpart B of Part 88...

2012-07-01

180

48 CFR 1852.216-88 - Performance incentive.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Performance incentive. 1852.216-88 Section...Provisions and Clauses 1852.216-88 Performance incentive. As prescribed in 1816...f), insert the following clause: Performance Incentive (JAN 1997) (a)...

2012-10-01

181

48 CFR 1852.216-88 - Performance incentive.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Performance incentive. 1852.216-88 Section...Provisions and Clauses 1852.216-88 Performance incentive. As prescribed in 1816...f), insert the following clause: Performance Incentive (JAN 1997) (a)...

2011-10-01

182

33 CFR 88.15 - Lights on dredge pipelines.  

Code of Federal Regulations, 2010 CFR

...2009-07-01 2009-07-01 false Lights on dredge pipelines. 88.15 Section 88.15 Navigation...RULES ANNEX V: PILOT RULES § 88.15 Lights on dredge pipelines. Dredge pipelines that are floating or supported on...

2009-07-01

183

33 CFR 88.15 - Lights on dredge pipelines.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Lights on dredge pipelines. 88.15 Section 88.15 Navigation...RULES ANNEX V: PILOT RULES § 88.15 Lights on dredge pipelines. Dredge pipelines that are floating or supported on...

2010-07-01

184

42 CFR 88.14 - Standard for determining medical necessity.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Standard for determining medical necessity. 88.14 Section 88.14... § 88.14 Standard for determining medical necessity. All treatment provided...information; and which has been included in the medical treatment protocols developed by the...

2011-10-01

185

MyD88 provides a protective role in long-term radiation-induced lung injury  

PubMed Central

Purpose The role of innate immune regulators is investigated in injury sustained from irradiation as in the clinic for cancer treatment or from a nuclear incident. The protective benefits of flagellin signaling through Toll-like receptors (TLR) in an irradiation setting warrant study of a key intracellular adaptor of TLR signaling, namely Myeloid differentiation primary response factor 88 (MyD88). The role of MyD88 in regulating innate immunity and Nuclear factor kappa-B (NF-?B)-activated responses targets this critical factor for influencing injury and recovery as well as maintaining immune homeostasis. Materials and methods To examine the role of MyD88, we examined immune cells and factors during acute pneumonitic and fibrotic phases in Myd88 -deficient animals receiving thoracic gamma (?)-irradiation. Results We found that MyD88 supports survival from radiation-induced injury through the regulation of inflammatory factors that aid in recovery from irradiation. The absence of MyD88 resulted in unresolved pulmonary infiltrate and enhanced collagen deposition plus elevated type 2 helper T cell (Th2) cytokines in long-term survivors of irradiation. Conclusions These results based only on a gene deletion model suggest that alterations of MyD88-dependent inflammatory processes impact chronic lung injury. Therefore, MyD88 may contribute to attenuating long-term radiation-induced lung injury and protecting against fibrosis.

Brickey, Willie J.; Neuringer, Isabel P.; Walton, William; Hua, Xiaoyang; Wang, Ellis Y.; Jha, Sushmita; Sempowski, Gregory D.; Yang, Xuebin; Kirby, Suzanne L.; Tilley, Stephen L.; Ting, Jenny P-Y.

2013-01-01

186

The Egyptain 1.88-m telescope  

NASA Astrophysics Data System (ADS)

Kottamia 1.88-m reflecting telescope in Egypt is the largest in the Middle East and North Africa. An extensive upgrading programme has been undertaken for this telescope to increase its efficiency. A new Zerodur optical system has been delivered by Carl Zeiss, Germany, and a new CCD system including an acquisition Camera Tek 1024×1024 pixels, with pixel size 24×24 micron and LN cooling, and an offset guiding camera Kodak 1080×1024 pixels with pixel size 16×16 micron and thermoelectric cooling. This CCD system has been attached to the Newtonian focus for direct imaging with scale 22.5 arcsec mm-1. The aluminizing plant has also been refurbished by Balzer, the new pumping system can accommodate mirrors up to 2m. The unit is supplied with a microprocessor, which controls and checks all recoating steps, closes all valves and stops the operation in any emergency. A Cassegrain spectrograph (donation from Okayama Astrophysical Observatory, Japan) will be attached to the telescope, after modification, for use with a CCD camera instead of the image-intensifier used before. This spectrograph will be used to obtain medium-dispersion and low dispersion spectra for faint stars and galaxies down to 15th magnitude.

Osman, Anas M. I.

187

Growth of different phases of yttrium manganese oxide thin films by pulsed laser deposition  

SciTech Connect

Various phases of yttrium manganese oxide (YMO) thin films have been synthesized on different substrates from a single target of h-YMnO{sub 3}. It is observed that the phase stability and crystallinity of YMO thin films depend on the substrate used and oxygen partial pressure (OPP). (110) oriented and polycrystalline growth of h-YMnO{sub 3} are observed on the Al{sub 2}O{sub 3} (0001) and NGO (110) substrates respectively, when grown in OPP {approx_equal} 10{sup -6} Torr. While for similar OPP value, growth of mixed phases (h-YMnO{sub 3} and o-YMn{sub 2}O{sub 5}) is observed on Si (001) substrate. Oriented growth of O-YMn{sub 2}O{sub 5} phase film on Si (001) substrate is observed first time, when deposited at OPP value of 225 and 350 mTorr. +3 and mixed oxidation states (+3 and +4) of Mn were confirmed by x-ray photoelectron spectroscopy in pure YMnO{sub 3} phase and YMn{sub 2}O{sub 5} phase respectively.

Kumar, Manish; Choudhary, R. J.; Phase, D. M. [UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore, 452001 (India)

2012-06-05

188

Recommendations for the use of yttrium-90 ibritumomab tiuxetan in malignant lymphoma.  

PubMed

Radioimmunotherapy (RIT) with Yttrium-90 (90Y) ibritumomab tiuxetan (Zevalin) combines the tumor targeting attributes of a monoclonal antibody against the CD20 antigen and the pure beta-radiation of 90Y. High efficacy and a favorable safety profile have been demonstrated in Phase II and III clinical trials enrolling patients with CD20+ B-cell non-Hodgkin lymphoma (B-NHL). On the basis of these results, 90Y-ibritumomab tiuxetan was approved in the United States for the treatment of patients with follicular lymphoma (FL) or transformed B-NHL. In the European Union its use was restricted to FL, refractory to or relapsed after rituximab. There are a number of important clinical trials currently evaluating 90Y-ibritumomab tiuxetan in other subtypes of lymphoma such as diffuse large-cell and mantle-cell lymphoma, as consolidation therapy or as part of myeloablative regimens. In light of the constantly increasing clinical experience with RIT, clinicians face the challenge of how to best integrate this promising new treatment option into existing established treatment algorithms. By incorporating the most recent data in this rapidly developing field, this review article focuses on current recommendations for the use of 90Y-ibritumomab tiuxetan in patients with malignant lymphoma, outlines future perspectives, and provides practical recommendations for patient management. PMID:16826593

Weigert, Oliver; Illidge, Tim; Hiddemann, Wolfgang; Dreyling, Martin

2006-08-15

189

Excitation of bending vibration by a moving domain wall in a plate of yttrium orthoferrite  

NASA Astrophysics Data System (ADS)

Elastic vibrations have been experimentally found induced by a moving domain wall in a sample of yttrium orthoferrite 10-4 m thick. Calculations have been carried out to suggest their relevance to flexural Lamb waves.

Kuz'Menko, A. P.; Zhukov, E. A.; Dobromyslov, M. B.

2006-07-01

190

Excitation of bending vibration by a moving domain wall in a plate of yttrium orthoferrite  

Microsoft Academic Search

Elastic vibrations have been experimentally found induced by a moving domain wall in a sample of yttrium orthoferrite 10?4m thick. Calculations have been carried out to suggest their relevance to flexural Lamb waves.

A. P. Kuz’menko; E. A. Zhukov; M. B. Dobromyslov

2006-01-01

191

Excitation of bending vibration by a moving domain wall in a plate of yttrium orthoferrite  

Microsoft Academic Search

Elastic vibrations have been experimentally found induced by a moving domain wall in a sample of yttrium orthoferrite 10-4 m thick. Calculations have been carried out to suggest their relevance to flexural Lamb waves.

A. P. Kuz'Menko; E. A. Zhukov; M. B. Dobromyslov

2006-01-01

192

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

193

Effects of Different Fabrication Techniques on the Yttrium-Barium-Copper Oxide High Temperature Superconductor.  

National Technical Information Service (NTIS)

This study examines how several different parameters were changed in the yttrium-barium-copper oxide superconductor when the fabrication techniques were altered by using different barium precursors, including barium peroxide and barium carbonate; sinterin...

P. A. Rhea

1988-01-01

194

Successful treatment of Cushing's disease using yttrium-90 rods.  

PubMed Central

Interstitial irradiation using yttrium-90 (90Y) rods implanted by needle into the pituitary gland was used as primary treatment in 16 patients with pituitary dependent Cushing's disease. Clinical and biochemical remission was observed within three or six months in 13 and in the remaining three after a supplementary implant. There was no perioperative morbidity. Follow-up from the time of definitive operation ranged from six to 123 months (mean 39). No recurrence has been observed. The return of a normal diurnal cortisol rhythm has been observed in 10/12 patients studied after remission. Some form of long-term pituitary hormone replacement therapy was required in only the six patients who had received the largest irradiation dose. Implantation of 90Y is safe and effective treatment for patients with Cushing's disease, comparing favourably with selective trans-sphenoidal pituitary surgery.

White, M C; Doyle, F H; Mashiter, K; Joplin, G F

1982-01-01

195

Magnetoelectric Coupling and Relaxation in Yttrium Iron Garnet  

NASA Astrophysics Data System (ADS)

We report the results of the magnetic and dielectric relaxation measurement on yttrium iron garnet Y3Fe5O12 which shows the 2nd order magneto-electric (ME) effect under an applied electric field [1] and the 1st order ME effect by an electric field cooling procedure [2]. We found that the temperature dependence of the dielectric relaxation dynamics coincides with that of magnetic one. This suggests a strong magneto-electric coupling between dielectric and magnetic relaxation dynamics. Indeed the dielectric relaxation strengths are enhanced by an applied magnetic field; namely the amplitude of electric dipole moment can be tuned by magnetic field. This effect accounts for the magnetic field induced change of the static dielectric permittivity and thereby the gigantic 2nd order ME effect as observed. [1] T.H. O'Dell, Phil. Mag. 16, 487 (1967), [2] H. Ogawa et al., JPSJ 56, 452 (1987).

Yamasaki, Yuichi; Kohara, Yuki; Tokura, Yoshinori

2009-03-01

196

Enhanced optical constants of nanocrystalline yttrium oxide thin films  

SciTech Connect

Yttrium oxide (Y{sub 2}O{sub 3}) films with an average crystallite-size (L) ranging from 5 to 40 nm were grown by sputter-deposition onto Si(100) substrates. The optical properties of grown Y{sub 2}O{sub 3} films were evaluated using spectroscopic ellipsometry measurements. The size-effects were significant on the optical constants and their dispersion profiles of Y{sub 2}O{sub 3} films. A significant enhancement in the index of refraction (n) is observed in well-defined Y{sub 2}O{sub 3} nanocrystalline films compared to that of amorphous Y{sub 2}O{sub 3}. A direct, linear L-n relationship found for Y{sub 2}O{sub 3} films suggests that tuning optical properties for desired applications can be achieved by controlling the size at the nanoscale dimensions.

Ramana, C. V.; Mudavakkat, V. H.; Bharathi, K. Kamala [Department of Mechanical Engineering, University of Texas at El Paso, El Paso, Texas 79968 (United States); Atuchin, V. V.; Pokrovsky, L. D. [Laboratory for Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk 90 630090 (Russian Federation); Kruchinin, V. N. [Laboratory for Ellipsometry of Semiconductor Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk 90 630090 (Russian Federation)

2011-01-17

197

Sol-gel synthesis and characterization of yttrium gallium garnets  

NASA Astrophysics Data System (ADS)

Precursor powders for yttrium gallium garnet (Y3Ga5O12, YGG) were prepared by a simple sol-gel method based on the formation of metal chelates in aqueous solvents. A systematic study of sol-gel technique synthesized YGG samples is presented using different complexing agents. Six high-purity organic substances were used as complexing agents, namely, tartaric acid, 1,2-ethanediol, citric acid, ethylene diamine tetra-acetic acid (EDTA), malonic acid, and oxalic acid. These agents were found to influence the characteristics of the end products, in particular their homogeneity. The phase purity, composition, and microstructure of the polycrystalline samples were studied by thermoanalytical methods (TGADTA), x-ray diffraction (XRD) analysis, IR spectroscopy, and scanning electron microscopy (SEM). From the typical XRD patterns of different synthesis products it is concluded that only the use tartaric acid, 1,2-ethanediol, citric acid, and EDTA yields a single YGG phase.

Leleckaite, Asta; Urbonaite, Sigita; Tõnsuaadu, Kaia; Kareiva, Aivaras

2005-08-01

198

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

199

X-ray diffraction from levitated liquid yttrium oxide  

SciTech Connect

The authors report the first measurements of the structure factor, S(Q), and radial distribution function, G(r), of yttrium oxide in the normal and supercooled liquid states in the temperature range 2,500--3,100 K. Measurements were obtained by synchrotron X-ray scattering on levitated, laser-heated liquid specimens. At temperatures far in excess of the melting point, the first and second coordination shells begin to merge, indicative of increased ionicity in the liquid. As the temperature is lowered into the supercooled region, there is substantial sharpening and strengthening in the first peaks in both S(Q) and G(r). Supercooling causes a decrease in the first shell coordination and Q values together with an increase in the Y-O interionic distance.

Krishnan, S. [Containerless Research, Inc., Evanston, IL (United States); Ansell, S.; Price, D.L. [Argonne National Lab., IL (United States)

1998-07-01

200

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.

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

2013-01-01

201

Thermoanalytical study of the formation mechanism of yttria from yttrium acetate  

Microsoft Academic Search

The processes involved in the thermal decomposition of yttrium acetate tetrahydrate, Y(CH3COO)3·4H2O, in air and in an inert atmosphere have been analyzed by thermoanalytical techniques (thermogravimetry, differential thermal analysis and evolved gas analysis) and by the structural characterization (X-ray diffraction, infrared spectroscopy, elemental analysis and scanning electron microscopy) of intermediates and final products. Decomposition of yttrium acetate is an endothermic

J. Farjas; J. Camps; P. Roura; S. Ricart; T. Puig; X. Obradors

2011-01-01

202

Surface Chemical Analysis and Electrokinetic Properties of Spherical Hematite Particles Coated with Yttrium Compounds  

Microsoft Academic Search

We describe in this work the chemical and electrokinetic surface characterization of core–shell particles consisting of a practically spherical hematite nucleus coated by a layer of yttrium basic carbonate or yttrium oxide (obtained after calcination of the carbonate-coated particles, following the method of E. Matijevi? and B. Aiken (J. Colloid Interface Sci.126,645 (1988))). The morphological and surface characteristics of the

R. C. Plaza; J. D. G. Durán; A. Quirantes; M. J. Ariza; A. V. Delgado

1997-01-01

203

Diffusivity of hydrogen isotopes in liquid lithium and in solid yttrium  

SciTech Connect

The separation of tritium from liquid lithium at low concentrations is an important problem for fusion technology. One of the most promising techniques for effecting this separation involves sorbing the tritium on solid yttrium metal. Reliable diffusivity data are essential for a realistic evaluation of this technique. This paper reviews the bodies of relevant experimental diffusivity data, i.e., data on protium diffusion in liquid lithium, protium diffusion in solid yttrium, and the isotope effect in metals.

Buxbaum, R.E.; Johnson, E.F.

1982-12-01

204

The behavior of yttrium implants in H13 steel under high temperature oxidation  

Microsoft Academic Search

The penetration depth of yttrium ions extracted at 30 kV from a metal vapor vacuum arc (MEVVA) source reaches approximately 50 nm in H13 steel. For a pre-set dose of 3×1017 cm?2, the retained dose decreases (1.04×1017–6.2×1016 cm?2) with increasing beam flux (25–76 ?A cm?2). During high temperature (600–800°C) oxidation, yttrium implants have no change in quantity, but migrate inwards

Ji Chengzhou; Wang Anming; Liao Huailin

2000-01-01

205

A joint experimental/theoretical investigation of the MMA polymerization initiated by yttrium phenoxyamine complexes.  

PubMed

A joint experimental/theoretical study has been carried out on the putative MMA polymerization catalyzed by an yttrium isopropyloxide complex. Despite its high activity in lactone polymerization, this catalyst is found to be unreactive on methyl methacrylate (MMA) polymerization. This surprising result is rationalized using a computational approach at the DFT level. Indeed, the endothermicity of the initiation step explains this lack of reactivity. The theoretical proposal of yttrium amido complexes as catalysts allows overcoming this initiation problem. PMID:23450227

Fang, Jian; Tschan, Mathieu J-L; Brulé, E; Robert, Carine; Thomas, Christophe M; Maron, Laurent

2013-03-01

206

Permittivity increase of yttrium-doped HfO2 through structural phase transformation  

Microsoft Academic Search

An approach to control the dielectric properties of hafnium-based oxide films with an intentional structural phase transformation was proposed and demonstrated. Yttrium serves effectively as a dopant to induce a phase transformation from the monoclinic to the cubic phase even at 600 °C. The yttrium-doped HfO2 films show higher permittivity than undoped HfO2, and the permittivity as high as 27

Koji Kita; Kentaro Kyuno; Akira Toriumi

2005-01-01

207

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

208

Effect of yttrium and chromium on the recrystallization of Al-Sc alloys  

NASA Astrophysics Data System (ADS)

The effect of small chromium and yttrium additions (0.14 1.0 wt%) on the recrystallization of Al-Sc alloys having 0.1 0.4% Sc is studied with polarized light. The microstructure of cold-rolled samples annealed at 100 630°C for 1 h is examined. The chromium and yttrium additions are found to slightly affect the recrystallization temperature of the Al-Sc alloys: they increase or decrease it slightly depending on the scandium content.

Rokhlin, L. L.; Dobatkina, T. V.; Bochvar, N. R.; Lysova, E. V.; Tarytina, I. E.

2007-08-01

209

Yttrium hydride films as switchable mirrors: optical characterization and electronic structure  

Microsoft Academic Search

The development of switchable mirrors based on yttrium hydride thin films is shown. Yttrium is deposited on regular glass under ultra-high vacuum conditions. Upon hydrogen pressure the transition from light-reflecting metal YH2 to transparent insulating YH3 is induced. Surface and optical characterization is performed to improve the deposition and hydrogenation conditions. A good variable transparency is achieved, with transmittance up

M. M. Sanchez-Lopez; P. Velasquez; R. Castaner; A. Gutierrez; J. Costa-Quintana; F. Lopez-Aguilar

2003-01-01

210

Features of Preparing Nano-Size Powders of Tetragonal Zirconium Dioxide Stabilized with Yttrium  

Microsoft Academic Search

The effect of wet chemical synthesis parameters on the properties of nano-powders of zirconium dioxide stabilized with yttrium is studied. Features of nano-powder synthesis by the oxalate, hydroxide and thermal hydrolysis of a sol methods are determined. Nano-size zirconium dioxide powder stabilized with 3 mole% yttrium is prepared by hydrothermal coprecipitation from a sol of metal chlorides and urea followed

O. O. Vasylkiv; Y. Sakka; V. V. Skorokhod

2005-01-01

211

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

212

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.

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

2012-01-01

213

Oxidation resistant yttrium silicates coating for carbon\\/carbon composites prepared by a novel in-situ formation method  

Microsoft Academic Search

Yttrium silicates interlayer coatings of the SiC\\/yttrium silicates\\/borosilicate glass multi-layer coating system were prepared by a novel in-situ formation method using Si and Y2O3 as starting materials in an oxidation atmosphere. The surface and cross-section microstructures of the coatings were characterized by XRD and SEM analyses. Oxidation resistance of the coated samples was tested. Results showed that dense yttrium silicate

Jian-Feng Huang; He-Jun Li; Xie-Rong Zeng; Fei Deng; Xin-bo Xiong; Ke-Zhi Li

2007-01-01

214

Preparation of mesoporous carbon by steam activation of commercial activated carbon in the presence of yttrium oxide  

Microsoft Academic Search

Mesoporous carbon was prepared by steam activation of commercial activated carbon in the presence of yttrium oxide. The loading of yttrium nitrate (precursor of yttrium oxide) was 0.2, 0.6, 1.0 and 2.0 wt%. The weight lost and gases formed during heating were detected by using thermogravimetric analysis and mass spectroscopy. The surface area and the total volume of the mesoporous

W. Z. Shen; J. T. Zheng; Y. L. Zhang; J. G. Wang; Z. F. Qin

2003-01-01

215

MyD88 mediated inflammatory signaling leads to CaMKII oxidation, cardiac hypertrophy and death after myocardial infarction.  

PubMed Central

The toll-like receptors (TLR) and myocardial infarction (MI) promote NF-?B-dependent inflammatory transcription and oxidative injury in myocardium. The multifunctional Ca2+/calmodulin-dependent protein kinase II (CaMKII) is activated by oxidation and contributes to NF-?B-dependent transcription, myocardial hypertrophy and post-MI death. The myeloid differentiation protein 88 (MyD88) is an adapter protein critical for many TLR functions, but downstream targets for TLR/MyD88 signaling in MI are not well understood. We asked if CaMKII and TLR/MyD88 pathways are interconnected and if TLR/MyD88 contributes to adverse outcomes after MI. Here we show that TLR-4 activation by lipopolysaccharide (LPS) induces CaMKII oxidation (ox-CaMKII) in cardiomyocytes. MI enhances ox-CaMKII in wild type (WT) hearts but not in MyD88?/? hearts that are defective in MyD88-dependent TLR signaling. In post-MI WT hearts expression of pro-inflammatory genes TNF-? (Tnfa), complement factor B (Cfb), myocyte death and fibrosis were significatly increased, but increases were significantly less in MyD88?/? hearts after MI. MyD88?/? cardiomyocytes were defective in NF-?B activation by LPS but not by the MyD88-independent TLR agonist poly(I:C). In contrast, TNF-? induced Cfb gene expression was not deficient in MyD88?/? cardiomyocytes. Several hypertrophy marker genes were upregulated in both WT and MyD88?/? hearts after MI, but Acta1 was significantly attenuated in MyD88?/? hearts, suggesting that MyD88 selectively affects expression of hypertrophic genes. Post-MI cardiac hypertrophy, inflammation, apoptosis, ox-CaMKII expression and mortality were significantly reduced in MyD88?/? compared to WT littermates. These data suggest that MyD88 contributes to CaMKII oxidation and is important for adverse hypertrophic and inflammatory responses to LPS and MI.

Singh, Madhu V.; Swaminathan, P.D.; Luczak, E.D.; Kutschke, W.; Weiss, R.M.; Anderson, M.E.

2012-01-01

216

MyD88 mediated inflammatory signaling leads to CaMKII oxidation, cardiac hypertrophy and death after myocardial infarction.  

PubMed

The toll-like receptors (TLR) and myocardial infarction (MI) promote NF-?B-dependent inflammatory transcription and oxidative injury in myocardium. The multifunctional Ca(2+)/calmodulin-dependent protein kinase II (CaMKII) is activated by oxidation and contributes to NF-?B-dependent transcription, myocardial hypertrophy and post-MI death. The myeloid differentiation protein 88 (MyD88) is an adapter protein critical for many TLR functions, but downstream targets for TLR/MyD88 signaling in MI are not well understood. We asked if CaMKII and TLR/MyD88 pathways are interconnected and if TLR/MyD88 contributes to adverse outcomes after MI. Here we show that TLR-4 activation by lipopolysaccharide (LPS) induces CaMKII oxidation (ox-CaMKII) in cardiomyocytes. MI enhances ox-CaMKII in wild type (WT) hearts but not in MyD88(-/-) hearts that are defective in MyD88-dependent TLR signaling. In post-MI WT hearts expression of pro-inflammatory genes TNF-? (Tnfa), complement factor B (Cfb), myocyte death and fibrosis were significantly increased, but increases were significantly less in MyD88(-/-) hearts after MI. MyD88(-/-) cardiomyocytes were defective in NF-?B activation by LPS but not by the MyD88-independent TLR agonist poly(I:C). In contrast, TNF-? induced Cfb gene expression was not deficient in MyD88(-/-) cardiomyocytes. Several hypertrophy marker genes were upregulated in both WT and MyD88(-/-) hearts after MI, but Acta1 was significantly attenuated in MyD88(-/-) hearts, suggesting that MyD88 selectively affects expression of hypertrophic genes. Post-MI cardiac hypertrophy, inflammation, apoptosis, ox-CaMKII expression and mortality were significantly reduced in MyD88(-/-) compared to WT littermates. These data suggest that MyD88 contributes to CaMKII oxidation and is important for adverse hypertrophic and inflammatory responses to LPS and MI. PMID:22326848

Singh, Madhu V; Swaminathan, Paari D; Luczak, Elizabeth D; Kutschke, W; Weiss, Robert M; Anderson, Mark E

2012-02-03

217

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

218

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

Code of Federal Regulations, 2012 CFR

...Miscellaneous § 1230.88 Patents, copyrights, inventions, and publications. Any patents, copyrights, trademarks, inventions, or publications...or other uses of such patents, copyrights, inventions, or publications...

2012-01-01

219

Generation, Properties, and Order Packing of Monodispersed Spherical Colloid Particles of Yttrium Hydroxy-Carbonate: A Colloidal Route to Minimizing Voids in Ceramics.  

National Technical Information Service (NTIS)

Yttrium hydroxy-carbonate particles were prepared by decomposition of urea in yttrium nitrate solutions. The nucleation and growth were studied in silica-seeded and unseeded systems. Precipitation took place only under neutral conditions. In unseeded syst...

P. Mwesigwa-Kayima

1987-01-01

220

Quadrupole effects in /sup 7/Li scattering at 88 MeV  

SciTech Connect

Calculations for /sup 7/Li elastic scattering at 88 MeV have been made explicitly including a quadrupole term in the optical potential resulting from folding of an effective nucleon-nucleon interaction with the quadrupole deformation of /sup 7/Li. Data for /sup 48/Ca could be fitted without a renormalization of the folded potential, but this was not possible for lighter targets which required a renormalization of about 0.6 even when the quadrupole potential was included.

Cook, J.; Vineyard, M.F.; Kemper, K.W.; Hnizdo, V.

1983-04-01

221

Nature of the bifunctional chelating agent used for radioimmunotherapy with yttrium-88 monoclonal antibodies: critical factors in determining in vivo survival and organ toxicity  

Microsoft Academic Search

One factor that is critical to the potential effectiveness of radioimmunotherapy is the design of radiometal-chelated antibodies that will be stable in vivo. Stability in vivo depends on the condition that both the chelate linkage and radiolabeling procedures not alter antibody specificity and biodistribution. In addition, synthesis and selection of the chelating agent is critical for each radiometal in order

R. W. Kozak; A. Raubitschek; S. Mirzadeh; M. W. Brechbiel; R. Junghaus; O. A. Gansow; T. A. Waldmann

1989-01-01

222

Yttrium-doped cobalt nanoferrites prepared by sol-gel combustion method and its characterization.  

PubMed

Ferrites are extremely important magnetic ceramics in the production of electronic components because they reduce the energy losses by the induced currents acting as electrical insulators. Similarly, the spinel-structured cobalt-based ferrites are promising materials for stress, torsion sensors and energy storage applications (anode materials in lithium batteries, fuel cells and solar cells). Therefore, many studies have focused on cobalt ferrites obtained using conventional techniques. Different sintering conditions, types and levels of substitution result in different microstructures and magnetostriction coefficients under a wide range of preparation conditions. Despite many attempts, there are no specific reports on the trivalent substitution of yttrium in cobalt ferrite to the best of our knowledge. In the present study, yttrium-doped cobalt ferrite was prepared with different concentrations to identify the crystallite size with respect to the yttrium concentration, temperature and changes in the structural and electrical properties. In addition, the resistance of the nanostructured yttrium-doped cobalt ferrites nanopowders was analyzed. The resistance was increased by the addition of yttrium to cobalt ferrites. PMID:23858896

Shobana, M K; Nam, Wonjong; Choe, Heeman

2013-05-01

223

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

224

Effect of yttrium on dynamic strain aging of vanadium alloys  

NASA Astrophysics Data System (ADS)

In order to improve the performance of vanadium alloys for fusion reactors, yttrium (Y) was added to reduce the interstitial O in the matrix by enhanced precipitation with Y. Effect of Y on interstitial C, N and O, however, remains to be investigated since they affect mechanical and fracture properties for vanadium alloys by pinning dislocations, such as dynamic strain aging (DSA). In this study, tensile tests were carried out on annealed V-4Cr-4Ti and V-4Cr-4Ti-Y alloys from 473 to 1073 K at strain rates ranging from 6.67 × 10-5 to 6.67 × 10-1 s-1 to investigate the performance of DSA. In the case of high-purity alloys, DSA regime was narrowed due to Y addition and the reduction in O content. In the case of O doped V-4Cr-4Ti alloys, DSA regime was also narrowed. This may be because the enhanced Ti-O precipitation reduced the O level in the matrix. Also, coarse precipitates (<500 nm) were observed in O doped V-4Cr-4Ti-Y alloy. Y might enhance the coarsening of Ti-precipitates. From activation energies for DSA, the diffusion of C and O is considered to induce the observed DSA. Y does not influence the diffusion of C and O, and might enhance the nucleation to form coarse precipitates.

Miyazawa, Takeshi; Nagasaka, Takuya; Hishinuma, Yoshimitsu; Muroga, Takeo; Li, Yanfen; Satoh, Yuhki; Kim, Sawoong; Abe, Hiroaki

2013-11-01

225

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

226

Shape evolution in yttrium and niobium neutron-rich isotopes  

SciTech Connect

The isotopic evolution of the ground-state nuclear shapes and the systematics of one-quasiproton configurations are studied in neutron-rich odd-A yttrium and niobium isotopes. We use a self-consistent Hartree-Fock-Bogoliubov formalism based on the Gogny energy density functional with two parametrizations, D1S and D1M. The equal-filling approximation is used to describe odd-A nuclei preserving both axial and time-reversal symmetries. Shape-transition signatures are identified in the N=60 isotopes in both the charge radii and spin parities of the ground states. These signatures are a common characteristic for nuclei in the whole mass region. The nuclear deformation and shape coexistence inherent to this mass region are shown to play a relevant role in the understanding of the spectroscopic features of the ground and low-lying one-quasiproton states. Finally, a global picture of the neutron-rich A{approx}100 mass region from krypton up to molybdenum isotopes is illustrated with the systematics of the nuclear charge radii isotopic shifts.

Rodriguez-Guzman, R.; Sarriguren, P. [Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Cientificas, Serrano 123, E-28006 Madrid (Spain); Robledo, L. M. [Departamento de Fisica Teorica, Modulo 15, Universidad Autonoma de Madrid, E-28049 Madrid (Spain)

2011-04-15

227

Pigmented villonodular synovitis managed by Yttrium 90 after debulking surgery.  

PubMed

The goal of this study was to evaluate outcome of patients with pigmented villonodular synovitis (PVNS) managed by Yttrium90 (90Y) after debulking surgery. Seven patients (3 males and 4 females) with PVNS were studied retrospectively. Mean follow-up was 47.8 months (range 24-97 months). Mean age was 44.8 years (range 20-68 years. Debulking surgeries via arthroscopic synovectomy were performed in 4 cases and in 3 cases via mini arthrotomy. After 90Y injection was applied. Magnetic resonance imaging (MRI) included measurement of synovial thickness in preoperative and at last control. Main musculoskeletal tumor society score was 26 (range, 23-29), main MTS rating was 70.4% (range, 38.5-86.2%). Mean preoperative synovial thickness was 14.9mm range 20-12mm. Synovial thickness was completely disappeared at last MRI examination. There was diffuse joint effusion preoperatively, decreasing at last control. No cases of PVNS recurrence were found. Although we had a small number of cases, we believe that combination of debulking surgery with intra-articular injection of 90Y for PVNS of knee joint is an effective and safe treatment method. PMID:18690320

Ozturk, Hayati; Bulut, Okay; Oztemur, Zekeriya; Bulut, Sema

2008-08-01

228

Low-voltage cathodoluminescence of europium-activated yttrium orthovanadate  

SciTech Connect

Emissive flat panel display systems operating in full color demand higher performance at low voltages (ca. 501000 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 (YVO{sub 4}:Eu), an efficient, red emitting CL phosphor. The CL efficiency of YVO{sub 4}:Eu crystallized from aqueous solution at 200{degrees}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 YVO{sub 4}: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 YVO{sub 4}:Eu are essentially the same as those of YVO{sub 4}:Eu produced via conventional, high-temperature routes.

Phillips, M.L.F.

1995-03-01

229

A Yttrium Iron Garnet-Lead Zirconate Titanate Phase Shifter  

NASA Astrophysics Data System (ADS)

Tunable microwave phase shifters are of interest for miniature oscillators and phased array antenna systems. Traditional ferrite phase shifters use magnetic tuning systems that are slow, demand high power, and are not miniature in size. Here we discuss the design, fabrication and characterization of a novel electric field tunable phase shifter based on a yttrium iron garnet (YIG) -- lead zirconate titanate (PZT) bilayer. The electrical control of the phase shift is realized through magnetoelectric (ME) interaction. The phase shifter consisted of a microstrip transmission line with stubs of ?/8 and 3?/8 lengths for generating circularly polarized microwave magnetic field in the YIG-PZT resonator. The ME resonator was made from 124 micron thick (100) YIG film on GGG and 0.5 mm thickness PZT with electrodes. The operating frequency of the phase shifter was set by applying appropriate bias magnetic field. The phase shift vs. electric field E characteristics was linear or quadratic in E, depending on the operating frequency. The maximum phase shift was 180 deg. and showed an insertion loss of 1.5-2.0 dB at 5 GHz and 3-4 dB at the frequency 10 GHz. The ME phase shifter is capable of rapid tuning, miniature in size and dissipates practically zero power. -- The work was supported by grants from ONR, ARO and NSF.

Srinivasan, G.; Tatarenko, A. S.; Bichurin, M. I.

2006-03-01

230

Intraperitoneal yttrium-90-labeled monoclonal antibody in ovarian cancer  

SciTech Connect

From March 1987 to March 1988, a phase I to II study was carried out in 25 patients with ovarian cancer. They received escalating doses of intraperitoneally (IP) administered yttrium-90 (Y-90)-labeled monoclonal antibody, HMFG1, against a tumor cell-surface antigen. Myelosuppression prevented an escalation of the administered Y-90 activity above 25 mCi. Y-90-labeled antibody was absorbed from the peritoneal cavity into the circulation. Maximum blood Y-90 activity was observed 40 hours after the IP injection with a mean of 21% of the injected activity (range, 14.2% to 26.4%) in the circulation. The radiation dose the bone marrow received from circulating Y-90-labeled antibody (the blood radiation dose) was calculated by applying the Medical Internal Radiation Dose (MIRD) formulation to the measured Y-90 activity in patients blood. Myelosuppression occurred following calculated blood radiation doses to bone marrow of only 10 to 30 cGy. The excessive myelosuppression following such modest radiation doses from circulating Y-90-labeled antibody could be explained by the uptake of Y-90 by bone. In an attempt to reduce bone absorption of Y-90, seven patients received an intravenous (IV) infusion of EDTA. This increased the urinary excretion of Y-90 from a mean of 11.1% to 32.3% of the injected activity (P = .0001). Fourteen patients had assessable tumor at laparoscopy. Tumor regression was observed in one patient, and palliation of ascites in a further patient.

Stewart, J.S.; Hird, V.; Snook, D.; Dhokia, B.; Sivolapenko, G.; Hooker, G.; Papadimitriou, J.T.; Rowlinson, G.; Sullivan, M.; Lambert, H.E. (Royal Postgraduate Medical School, London (England))

1990-12-01

231

Ab initio calculations of yttrium nitride: structural and electronic properties  

NASA Astrophysics Data System (ADS)

Using first principles total energy calculations within the full-potential linearized augmented plane wave method, we have studied the structural and electronic properties of yttrium nitride (YN) in the three phases, namely wurtzite, caesium chloride and rocksalt structures. The calculations are performed at zero and under hydrostatic pressure. In agreement with previous findings, it is found that the favored phase for YN is the rocksalt-like structure. We predict that at zero pressure YN in the rocksalt structure is a semiconductor with an indirect bandgap of 0.8 eV. A phase transition from a rocksalt to a caesium chloride structure is found to occur at ˜134 GPa. Besides, a transition from an indirect ( ?- X) bandgap semiconductor to a direct ( X- X) one is predicted at pressure of ˜84 GPa. For the electron effective mass of rocksalt YN, these are the first results, to our knowledge. The information derived from the present study may be useful for the use of YN as an active layer in electronic devices such as diodes and transistors.

Zerroug, S.; Ali Sahraoui, F.; Bouarissa, N.

2009-11-01

232

Shape evolution in yttrium and niobium neutron-rich isotopes  

NASA Astrophysics Data System (ADS)

The isotopic evolution of the ground-state nuclear shapes and the systematics of one-quasiproton configurations are studied in neutron-rich odd-A yttrium and niobium isotopes. We use a self-consistent Hartree-Fock-Bogoliubov formalism based on the Gogny energy density functional with two parametrizations, D1S and D1M. The equal-filling approximation is used to describe odd-A nuclei preserving both axial and time-reversal symmetries. Shape-transition signatures are identified in the N=60 isotopes in both the charge radii and spin parities of the ground states. These signatures are a common characteristic for nuclei in the whole mass region. The nuclear deformation and shape coexistence inherent to this mass region are shown to play a relevant role in the understanding of the spectroscopic features of the ground and low-lying one-quasiproton states. Finally, a global picture of the neutron-rich A~100 mass region from krypton up to molybdenum isotopes is illustrated with the systematics of the nuclear charge radii isotopic shifts.

Rodriguez-Guzman, R.; Sarriguren, P.; Robledo, L. M.

2011-04-01

233

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

234

10 CFR 71.88 - Air transport of plutonium.  

Code of Federal Regulations, 2010 CFR

...2009-01-01 2009-01-01 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...

2009-01-01

235

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

236

10 CFR 71.88 - Air transport of plutonium.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 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...

2013-01-01

237

18 CFR 401.88 - Findings, report and Commission review.  

Code of Federal Regulations, 2013 CFR

18 Conservation of Power and Water Resources 2 2013-04-01...88 Section 401.88 Conservation of Power and Water Resources DELAWARE RIVER BASIN...submission and may have not less than ten (10) days to respond before action...

2013-04-01

238

The nucleoporin Nup88 is interacting with nuclear lamin A.  

PubMed

Nuclear pore complexes (NPCs) are embedded in the nuclear envelope (NE) and mediate bidirectional nucleocytoplasmic transport. Their spatial distribution in the NE is organized by the nuclear lamina, a meshwork of nuclear intermediate filament proteins. Major constituents of the nuclear lamina are A- and B-type lamins. In this work we show that the nuclear pore protein Nup88 binds lamin A in vitro and in vivo. The interaction is mediated by the N-terminus of Nup88, and Nup88 specifically binds the tail domain of lamin A but not of lamins B1 and B2. Expression of green fluorescent protein-tagged lamin A in cells causes a masking of binding sites for Nup88 antibodies in immunofluorescence assays, supporting the interaction of lamin A with Nup88 in a cellular context. The epitope masking disappears in cells expressing mutants of lamin A that are associated with laminopathic diseases. Consistently, an interaction of Nup88 with these mutants is disrupted in vitro. Immunoelectron microscopy using Xenopus laevis oocyte nuclei further revealed that Nup88 localizes to the cytoplasmic and nuclear face of the NPC. Together our data suggest that a pool of Nup88 on the nuclear side of the NPC provides a novel, unexpected binding site for nuclear lamin A. PMID:21289091

Lussi, Yvonne C; Hügi, Ilona; Laurell, Eva; Kutay, Ulrike; Fahrenkrog, Birthe

2011-02-02

239

The nucleoporin Nup88 is interacting with nuclear lamin A  

PubMed Central

Nuclear pore complexes (NPCs) are embedded in the nuclear envelope (NE) and mediate bidirectional nucleocytoplasmic transport. Their spatial distribution in the NE is organized by the nuclear lamina, a meshwork of nuclear intermediate filament proteins. Major constituents of the nuclear lamina are A- and B-type lamins. In this work we show that the nuclear pore protein Nup88 binds lamin A in vitro and in vivo. The interaction is mediated by the N-terminus of Nup88, and Nup88 specifically binds the tail domain of lamin A but not of lamins B1 and B2. Expression of green fluorescent protein–tagged lamin A in cells causes a masking of binding sites for Nup88 antibodies in immunofluorescence assays, supporting the interaction of lamin A with Nup88 in a cellular context. The epitope masking disappears in cells expressing mutants of lamin A that are associated with laminopathic diseases. Consistently, an interaction of Nup88 with these mutants is disrupted in vitro. Immunoelectron microscopy using Xenopus laevis oocyte nuclei further revealed that Nup88 localizes to the cytoplasmic and nuclear face of the NPC. Together our data suggest that a pool of Nup88 on the nuclear side of the NPC provides a novel, unexpected binding site for nuclear lamin A.

Lussi, Yvonne C.; Hugi, Ilona; Laurell, Eva; Kutay, Ulrike; Fahrenkrog, Birthe

2011-01-01

240

Carbonate complexation of yttrium and the rare earth elements in natural waters  

NASA Astrophysics Data System (ADS)

Potentiometric measurements of Yttrium and Rare Earth Element (YREE) complexation by carbonate and bicarbonate indicate that the quality of carbonate complexation constants previously obtained via solvent exchange analyses are superior to characterizations obtained using solubility and adsorptive exchange analyses. The results of our analyses at 25°C are combined with the results of previous solvent exchange analyses to obtain YREE carbonate complexation constants over a wide range of ionic strength (0 ? I ?3 molal). YREE carbonate complexation constants are reported for the following equilibria, M 3++nHCO 3-?M(CO 3) n3-2n+nH +, where n = 1 or 2. Formation constants written in terms of HCO 3- concentrations require only minor corrections for ion pairing relative to the corrections required for constants expressed in terms of CO 32- concentrations. Formation constants for the above complexation equilibria, CO3H? 1=[MCO 3+][H +][M 3+] -1[HCO 3-] -1 and CO3H? 2=[M(CO 3) 2-][H +] 2[M 3+] -1[HCO 3-] -2, have very similar dependencies on ionic strength because the reaction MCO 3++HCO 3-?M(CO 3) 2-+H + is isocoulombic. Potentiometric analyses indicate that the dependence of log CO3H? 1 and log CO3H? 2 on ionic strength at 25°C is given as logCO3H? n= logCO3H? n0-4.088 I0.5/(1+3.033 I0.5)+0.042 I where CO3H? n0 denotes a formation constant at 25°C and zero ionic strength. Recommended values for log CO3H? 1 and log CO3H? 20, expressed in the form (element, -log CO3H? 10, -log CO3H? 20), are as follows: (Y, 2.85, 8.03), (La, 3.60, 9.36), (Ce, 3.27, 8.90), (Pr, 3.10, 8.58), (Nd, 3.05, 8.49), (Sm, 2.87, 8.13), (Eu, 2.85, 8.03), (Gd, 2.94, 8.18), (Tb, 2.87, 7.88), (Dy, 2.77, 7.75), (Ho, 2.78, 7.66), (Er, 2.72, 7.54), (Tm, 2.65, 7.39), (Yb, 2.53, 7.36), (Lu, 2.58, 7.29).

Luo, Yu-Ran; Byrne, Robert H.

2004-02-01

241

Trapping and evaporation of strontium-87 and strontium-88 mixtures  

NASA Astrophysics Data System (ADS)

This thesis describes trapping and evaporative cooling of ultracold 87Sr and 88Sr mixtures in an optical dipole trap to produce the first Bose-Einstein condensate (BEC) of 88Sr. Furthermore, this work presents thermalization studies that characterize the scattering properties of these ultracold strontium samples. Such ultracold atomic gases have become an important area of research because of their potential for improving optical frequency standards and for realizing quantum computation using neutral atoms. A BEC of 88Sr is particularly interesting because the small value of its background s-wave scattering length may enable the use of optical Feshbach resonances to create two-dimensional solitons. However, the small scattering length for 88Sr also hinders efficient evaporative cooling in the optical dipole trap, a necessary step to producing a BEC. Experiments with other ultracold gases have successfully overcome this hurdle by mixing in a second atomic species which, by introducing stronger interactions with the weakly interacting species, enables evaporation to colder temperatures via sympathetic cooling. For this work, we use 87Sr to sympathetically cool 88Sr during forced evaporation to quantum degeneracy. Previous experiments in the Killian Lab characterized 88Sr in detail. Here, I emphasize the new or improved aspects that have allowed trapping and cooling of the mixtures of 87Sr and 88 Sr: trapping of 87Sr by itself, spectroscopic measurements of all the stable strontium isotopes to guide the trapping of isotopic mixtures, imaging of both 87Sr and 88Sr, and the various trade-offs necessary to simultaneously trap 87Sr and 88Sr. Finally, I discuss how the thermalization studies of the scattering properties of the isotopes guide the forced evaporation of mixed isotope samples. These efforts result in the production of the BEC of 88Sr, but they also point the way to future studies of fermionic quantum degeneracy in 87Sr and to the rich physics of mixed species ultracold atomic systems.

Mickelson, Pascal Gerry

242

Composition-Structural-Electrical Properties of Yttrium-Stabilized Hafnium Oxide Films Deposited by Atomic Layer Deposition  

NASA Astrophysics Data System (ADS)

Sequential Atomic Layer Deposition was used to deposit yttrium-doped hafnium oxide films with variable yttrium content using tris (ethylcyclopentadienyl) yttrium, and tetrakis (diethylamino) hafnium as metal precursors and water vapor as the oxidizer. The structure and electrical properties of the resulting films were analyzed after different post-deposition annealing conditions to assess composition-structure-dielectric property relationships. 2.5--100% yttrium-doped films annealed above 600^oC for 5 minutes consistently yielded cubic-HfO2 structures. However, there was a strong compositional effect on the dielectric constant, which maximized at ˜14% yttrium content. The films studied had leakage current density of 10-5 A/cm^2 or less at 1 V.

Tao, Qian; Jursich, Gregory; Takoudis, Christos

2010-03-01

243

Selective encapsulation of the carbides of yttrium and titanium into carbon nanoclusters  

SciTech Connect

Characterization of the arc-discharge deposits at the cathode from anodes containing yttrium oxide and titanium by transmission electron microscopy and x-ray diffraction shows different results with respect to an encapsulation of the metal carbides into carbon clusters. Yttrium carbide is encapsulated into carbon nanoclusters in a crystalline phase. The formation of titanium carbide, on the other hand, preempts the formation of the carbon---carbon bonds necessary to form the carbon cages, so that only titanium carbide clusters are observed. Thermodynamic data support the interpretation of the results.

Seraphin, S.; Zhou, D. (Department of Materials Science and Engineering, University of Arizona, Tucson, Arizona 85721 (United States)); Jiao, J. (Department of Physics, University of Airzona, Tucson, Arizona 85721 (United States)); Withers, J.C.; Loutfy, R. (Materials and Electrochemical Research Corporation, Tucson, Arizona 85706 (United States))

1993-10-11

244

Surface Chemical Analysis and Electrokinetic Properties of Spherical Hematite Particles Coated with Yttrium Compounds  

PubMed

We describe in this work the chemical and electrokinetic surface characterization of core-shell particles consisting of a practically spherical hematite nucleus coated by a layer of yttrium basic carbonate or yttrium oxide (obtained after calcination of the carbonate-coated particles, following the method of E. Matijevic and B. Aiken (J. Colloid Interface Sci. 126, 645 (1988))). The morphological and surface characteristics of the particles were controlled by modifying the initial yttrium nitrate concentration and the growing time. A total of 14 samples of hematite-yttrium basic carbonate composites were obtained, and three of them (obtained by keeping at 90degreesC solutions containing 6.5 x 10(-4) M alpha-Fe2O3, 1.8 M urea, and 1.1, 3, and 4.9 mM Y(NO3)3, respectively) were then converted into hematite-Y2O3 particles. Transmission electron microscopy was used to ascertain the shape and size of the particles. The spherical geometry of the core hematite is found, as a rule, on the core-shell particles; in general, carbonate samples obtained with intermediate initial concentration of Y(NO3)3 have the maximum coating thickness, whereas increasing that concentration does not lead to thicker coatings. Hence, formation of individual yttrium basic carbonate, together with coated hematite, cannot be completely ruled out under such conditions. Two techniques were employed for the elucidation of the surface composition of the particles, namely EDX and XPS (or ESCA). In particular, XPS data show that the coating of hematite by yttrium carbonate is almost complete in the case of particles obtained with 3 mM Y(NO3)3 concentration and 9-h heating time. The oxide samples obtained after calcination show high contents of yttrium and low iron surface concentration for initial [Y(NO3)3] = 1.1 mM (sample OB9) and 3 mM. According to XPS analysis, both types of particles have a quite similar surface composition and structure. For all types of particles but the carbonate-coated ones obtained at the shortest reaction times, the pHiep was found to be above that of pure hematite, approaching that of yttrium basic carbonate or oxide. In particular, among the oxide-coated particles, it is sample OB9 the one that most closely approaches its pHiep to that of Y2O3, in good agreement with the surface chemical analysis performed with XPS. Copyright 1997 Academic Press. Copyright 1997Academic Press PMID:9398422

Plaza; Duran; Quirantes; Ariza; Delgado

1997-10-15

245

Preparation of yttrium, lanthanum, cerium, and neodymium basic carbonate particles by homogeneous precipitation  

SciTech Connect

Uniform yttrium, lanthanum, cerium, and neodymium basic carbonate particles were prepared by homogeneous precipitation. Powders were characterized with respect to size, shape, crystal structure, and thermal decomposition behavior. Yttria precursor particles were spherical, monosized (0.4 {mu}m), and amorphous; whereas lanthana, neodymia, and ceria precursors were prismatic (ranging from 1 to 6 {mu}m in size) and crystalline. Crystal structure was found to be ancylite-type orthorhombic symmetry in all three cases. Upon heating in air, yttrium, lanthanum, and neodymium precursors underwent two-step decomposition to first form oxycarbonate and then oxide. Cerium hydroxycarbonate decomposed in a single step to form the oxide.

Akinc, M.; Sordelet, D. (Iowa State Univ., Ames (USA))

1987-07-01

246

Electronic structure and absorption spectra of yttrium quinaldinates with an island and polymer structure  

NASA Astrophysics Data System (ADS)

The electronic absorption spectra and electronic structure of yttrium quinaldinates with an island and polymer structure were studied. A comparative analysis of the energies of the singlet and triplet excited states, the total energies of complex compounds in the ground state, and Mulliken's bond overlap populations was performed by the TD-DFT method with the B3LYP density functional. For yttrium quinaldinate with a polymer structure, the distance between the highest occupied and lowest unoccupied orbitals was found to be longer than for the compound with an island structure. The transition energies were shifted to the blue region, which accounts for the higher stability of the polymer compound.

Kalinovskaya, I. V.; Emelina, T. B.; Mirochnik, A. G.; Karasev, V. E.

2011-08-01

247

Direct Observation and Calipering of the {open_quotes}Webbing{close_quotes} Fermi Surface of Yttrium  

SciTech Connect

The first measurement of both the size and shape of the region of the Fermi surface of yttrium known as the {open_quotes}webbing{close_quotes} is reported. This particular Fermi surface feature is of considerable interest because it is very similar to that found in a number of the heavier rare earth metals, where it is believed to play a vital role in driving the exotic magnetic structures found therein. In this positron study, two-dimensional angular correlation measurements combined with three-dimensional reconstruction provide a direct image of this part of the yttrium Fermi surface. {copyright} {ital 1997} {ital The American Physical Society}

Dugdale, S.B.; Fretwell, H.M.; Alam, M.A. [H.H.Wills Physics Laboratory, University of Bristol,Tyndall Avenue, Bristol, BS8 1TL (United Kingdom); Kontrym-Sznajd, G. [Polish Academy of Sciences, W. Trzebiatowski Intsitute of Low Temperature and Structure Research, 50-950 Wroclaw 2, P.O.Box 937 (Poland); West, R.N.; Badrzadeh, S. [Department of Physics, University of Texas at Arlington, P.O.Box 19059, Arlington, Texas 76019 (United States)

1997-08-01

248

Influence of oxygen content on formation of yttrium [alpha]-SiAlON ceramics  

SciTech Connect

Low-porosity [alpha]- and [beta]-SiAlON composite material was prepared when the powder mixture intended for preparation of yttrium [alpha]-SiAlON, with the formula Y[sub 0.4]Si[sub 12[minus]m+n]Al[sub m+n]O[sub n]N[sub 16[minus] n], was attritor milled in isopropyl alcohol or contained excess oxygen (n > 0.6). The region of stability of single-phase yttrium [alpha]-SiAlON was smaller at lower temperatures. Wet milling (in isopropyl alcohol) of AlN powder was found to introduce excess oxygen into the milled powder.

Haviar, M. (Slovak Academy of Sciences, Bratislava (Slovakia). Inst. of Organic Chemistry)

1994-09-01

249

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

250

Fractionation of yttrium and holmium during basaltic soil weathering  

NASA Astrophysics Data System (ADS)

The anomalously low affinity of yttrium (Y) for iron (Fe) (oxyhydr)oxides relative to lanthanides with similar ionic radius (e.g., Ho) has been demonstrated in experiments with isolated Fe minerals and in a variety of marine systems that contain high concentrations of solid phase Fe. However, it has not previously been demonstrated to occur during soil genesis, despite the common observation that many soils become enriched in Fe over time. We hypothesized that Y would become progressively depleted in soils relative to Ho with increased weathering. Since, trivalent Y has an anomalously low Misono softness relative to other trivalent ions included in the rare earth element and yttrium group (REY3+), we also investigated whether soil REY fractionation reflects variation in Misono softness. To test this, we measured trends in total REY concentrations for Hawaiian soils derived from basaltic parent materials aged 0.3-4100 ky, and measured REYs released from the same samples during short-time (3 h) dissolution experiments conducted as part of a previous investigation linking dissolution with surface charge properties (Chorover et al., 2004). The chondrite-normalized Y/Ho ratios in the parent Hawaiian basalt (Chond[Y/Ho] = 0.998) and continental dust (Chond[Y/Ho] = 0.994) inputs are remarkably similar, and thus we can interpret deviations from Chond[Y/Ho] ˜ 1.0 to result from soil biogeochemical processes and not source mixing. Between 0.3 and 20 ky, the Chond[Y/Ho] ratio of the subsurface soils decreased from 0.96 ± 0.07(2?) to 0.71 ± 0.05, and then remained unchanged across the rest of the weathering sequence. In contrast, the Chond[Y/Ho] ratio of the surface soils decreased from 0.99 ± 0.07 to 0.76 ± 0.05 at 150 ky and then, most likely due to continued dust inputs, increased to 1.04 ± 0.07 in the oldest soils. Analysis of the short-time dissolution experiments revealed preferential release of Y relative to Ho (and also La relative Pr) at intermediate pH where aqueous REY concentrations are governed by proton competition for adsorption sites. Proton-competition-control over REY release is bounded at high pH by the onset of colloidal dispersion—represented by the point of minimum dissolution (p.m.d.) of Al—and at low pH by the soil's point of zero net charge (p.z.n.c.) and/or when proton-promoted dissolution of REY-containing solids, including Fe-(oxyhydr)oxides, control REY release. Results of our dissolution experiments suggest that complexation of REYs by dissolved organic matter (DOM) does not drive Y-Ho fractionation during pedogenesis, but rather may suppress it. Synthesis of these field and laboratory experiments suggests the Y/Ho ratio decreases early in soil development (<20 ky) when weathering rates are high and competitive proton adsorption affects REY fractionation. Given that Fe-(oxyhydr)oxide sorbents exhibit greater affinity for Ho relative to Y, their prevalent neo-formation during incipient pedogenesis likely plays a central role in Y-Ho fractionation in these soils. Persistence of low Chond[Y/Ho] ratios in the subsurface soils even at 4100 ky suggests Y-Ho fractionation continues, albeit at a slower rate, as weathering proceeds.

Thompson, Aaron; Amistadi, Mary Kay; Chadwick, Oliver A.; Chorover, Jon

2013-10-01

251

High energy heavy ion irradiation damage in yttrium iron garnet  

NASA Astrophysics Data System (ADS)

We have studied the damage in ferrimagnetic yttrium iron garnet, Y3Fe5O12 or YIG, produced by energetic heavy ion bombardment, for which the electronic stopping power is much higher than the nuclear stopping power. Epitaxial thin films of YIG on (111)-Gd3Ga5O12 substrates were thus irradiated at room temperature with 50 MeV 32S, 50 MeV 63Cu, 235 MeV 84Kr, and with 59 MeV, 185 MeV and 792 MeV 132Xe ion beams. The film thicknesses were always smaller than the ion mean projected ranges, in order to avoid implantation effects in the layers. The resulting damage was then studied by high resolution X-ray diffraction, channeling Rutherford backscattering (RBS) spectroscopy and room temperature magnetization measurements. After these ion irradiations, the structural as well as the ferrimagnetic long-range orders are progressively destroyed. X-ray measurements on 84Kr irradiated samples show the presence of compressive lateral macrostresses in the films due to the coexistence of crystalline and disordered phases. These stresses are partly relaxed away at high fluences, when the amount of disordered phase is high enough (around 45%). Cross section data for this damage process are deduced from the RBS and 300 K saturation magnetization measurements for six different values of the electronic energy loss, between 7 and 27 MeV ?m-1. The damage cross section increases nonlinearly as a function of the electronic stopping power, then seems to level off above 22 MeV ?m -1. However the comparison with previous works indicates that the electronic stopping power might not be the only key-parameter in this process, where the ion beam energy parameters might play some role.

Costantini, J. M.; Brisard, F.; Flament, J. L.; Meftah, A.; Toulemonde, M.; Hage-Ali, M.

1992-03-01

252

9 CFR 88.6 - Violations and penalties.  

Code of Federal Regulations, 2013 CFR

...POULTRY) AND ANIMAL PRODUCTS COMMERCIAL TRANSPORTATION OF EQUINES FOR SLAUGHTER § 88.6 Violations and penalties. ...violation of any of the regulations in this part. (b) Each equine transported in violation of the regulations of this part...

2013-01-01

253

9 CFR 88.4 - Requirements for transport.  

Code of Federal Regulations, 2013 CFR

...PRODUCTS COMMERCIAL TRANSPORTATION OF EQUINES FOR SLAUGHTER § 88.4 Requirements...Prior to the commercial transportation of equines for slaughter, the owner/shipper must...consecutive hours immediately prior to the equines being loaded on the conveyance,...

2013-01-01

254

21 CFR 520.88f - Amoxicillin trihydrate tablets.  

Code of Federal Regulations, 2013 CFR

...HEALTH AND HUMAN SERVICES (CONTINUED) ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS ORAL DOSAGE FORM NEW ANIMAL DRUGS § 520.88f Amoxicillin trihydrate...in 5 days, review diagnosis and change therapy. Federal law restricts this drug...

2013-04-01

255

88. Paso Del Norte Hotel, 115117 South El Paso St., ...  

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

88. Paso Del Norte Hotel, 115-117 South El Paso St., south facade, west side of street - South El Paso Street Historic District, South El Paso, South Oregon & South Santa Fe Streets, El Paso, El Paso County, TX

256

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...

2009-07-01

257

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

258

88. VIEW LOOKING FROM THE BRIDGE FROM THE MARLBOROUGH HOTEL ...  

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

88. VIEW LOOKING FROM THE BRIDGE FROM THE MARLBOROUGH HOTEL TOWARD THE READING LOUNGE OUTSIDE OF THE MAIN DINING ROOM OF THE BLENHEIM HOTEL - Blenheim Hotel, Ohio Avenue & Boardwalk, Atlantic City, Atlantic County, NJ

259

9 CFR 88.4 - Requirements for transport.  

Code of Federal Regulations, 2010 CFR

... Requirements for transport. 88.4 Section... Requirements for transport. (a) Prior...well-being), potable water, and the opportunity...provided access to food, water, and rest prior to transport in accordance...

2009-01-01

260

9 CFR 88.4 - Requirements for transport.  

Code of Federal Regulations, 2010 CFR

... Requirements for transport. 88.4 Section... Requirements for transport. (a) Prior...well-being), potable water, and the opportunity...provided access to food, water, and rest prior to transport in accordance...

2010-01-01

261

49 CFR 1.88 - The Federal Railroad Administration.  

Code of Federal Regulations, 2012 CFR

...Secretary of Transportation ORGANIZATION AND DELEGATION OF POWERS AND DUTIES Operating Administrations § 1.88 The Federal...among rail passenger service, intercity bus, local transit, bicycle/pedestrian, and airport...

2012-10-01

262

88. VIEW OF AIR COMPRESSOR ROOM FROM NORTHWEST (ON SUMP ...  

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

88. VIEW OF AIR COMPRESSOR ROOM FROM NORTHWEST (ON SUMP LEVEL). COMPRESSOR No. 1 IN FOREGROUND; No. 2 TO REAR. - Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, Lead, Lawrence County, SD

263

14 CFR 33.88 - Engine overtemperature test.  

Code of Federal Regulations, 2013 CFR

...STANDARDS: AIRCRAFT ENGINES Block Tests; Turbine Aircraft Engines § 33.88 Engine...OEI ratings. Following this run, the turbine assembly must be within serviceable limits...OEI rating. Following this run, the turbine assembly may exhibit distress...

2013-01-01

264

88. (Credit CBF) Twelve Mile Bayou Pumping Station and force ...  

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

88. (Credit CBF) Twelve Mile Bayou Pumping Station and force main for pumping water over levee and into the canal (Blind Bayou), March 1913. - McNeil Street Pumping Station, McNeil Street & Cross Bayou, Shreveport, Caddo Parish, LA

265

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

266

42 CFR 32.88 - Examinations and treatment.  

Code of Federal Regulations, 2012 CFR

...AND HUMAN SERVICES MEDICAL CARE AND EXAMINATIONS MEDICAL CARE FOR PERSONS WITH HANSEN'S DISEASE AND OTHER PERSONS IN...Persons with Hansen's Disease § 32.88 Examinations...primary or secondary conditions, and such...

2012-10-01

267

42 CFR 32.88 - Examinations and treatment.  

Code of Federal Regulations, 2011 CFR

...AND HUMAN SERVICES MEDICAL CARE AND EXAMINATIONS MEDICAL CARE FOR PERSONS WITH HANSEN'S DISEASE AND OTHER PERSONS IN...Persons with Hansen's Disease § 32.88 Examinations...primary or secondary conditions, and such...

2011-10-01

268

45 CFR 88.2 - Complaint handling and investigating.  

Code of Federal Regulations, 2012 CFR

...POLICIES OR PRACTICES IN VIOLATION OF FEDERAL LAW § 88.2 Complaint handling...Rights (OCR) of the Department of Health and Human Services is designated to receive complaints based on the Federal health care provider conscience...

2012-10-01

269

45 CFR 88.2 - Complaint handling and investigating.  

Code of Federal Regulations, 2011 CFR

...POLICIES OR PRACTICES IN VIOLATION OF FEDERAL LAW § 88.2 Complaint handling...Rights (OCR) of the Department of Health and Human Services is designated to receive complaints based on the Federal health care provider conscience...

2011-10-01

270

88. DETAIL OF 'LOCATION 25' EQUIPMENT CABINET CONTAINING AUTOPILOT GYRO ...  

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

88. DETAIL OF 'LOCATION 25' EQUIPMENT CABINET CONTAINING AUTOPILOT GYRO MONITORS AND TAPE PUNCH - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

271

88. INTERIOR, SECOND FLOOR, NORTH ENTRANCE, NORTH FOYER, DETAIL OF ...  

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

88. INTERIOR, SECOND FLOOR, NORTH ENTRANCE, NORTH FOYER, DETAIL OF CEILING MEDALLION AND LIGHTING FIXTURE - U.S. Department of the Interior, Eighteenth & C Streets Northwest, Washington, District of Columbia, DC

272

Paramagnetic Resonance of Fe3+ in Octahedral and Tetrahedral Sites in Yttrium Gallium Garnet (YGaG) and Anisotropy of Yttrium Iron Garnet (YIG)  

Microsoft Academic Search

The electron paramagnetic resonance spectrum of a small Fe3+ impurity which enters substitutionally for the gallium in single crystals of yttrium gallium garnet (chemical formula Y3Ga5O12) has been examined at 24 kMc\\/sec at 295°K and 1.6°K. Fe3+ is studied for the first time in tetrahedral coordination. The results for the crystal field parameters that appear in the usual spin Hamiltonian

S. Geschwind

1961-01-01

273

MyD88 and its divergent toll in carcinogenesis.  

PubMed

Toll-like and interleukin-1 (IL-1) family receptors recognize microbial or endogenous ligands and inflammatory mediators, respectively, and with the exception of Toll-like receptor 3 (TLR3), signal via the adaptor molecule myeloid differentiation factor 88 (MyD88). MyD88 is involved in oncogene-induced cell intrinsic inflammation and in cancer-associated extrinsic inflammation, and as such MyD88 contributes to skin, liver, pancreatic, and colon carcinogenesis, as well as sarcomagenesis. MyD88 is also protective, for example in oncogenic virus carcinogenesis or, acting downstream of IL-18R to strengthen mucosal repair, in azoxymethane (AOM)/dextran sulfate sodium (DSS)-induced colon carcinogenesis. Here, we discuss the mechanisms of the divergent effects of MyD88 and the balance of its protumor role in cancer-enhancing inflammation and immunity and its antitumor role in tissue homeostasis, repair, and immunity against the tumor or oncogenic pathogens. PMID:23660392

Salcedo, Rosalba; Cataisson, Christophe; Hasan, Uzma; Yuspa, Stuart H; Trinchieri, Giorgio

2013-05-07

274

Yttrium ENDF/B-VII Data from Theory and LANSCE/GEANIE Measurements and Covariances Estimated using Bayesian and Monte-Carlo Methods  

NASA Astrophysics Data System (ADS)

Yttrium plays an important role as a radiochemical dosimetry detector for determining high energy 14 MeV neutron fluences, through measurement of (n,2n) activation products. The total (n,2n) cross section is known rather well from extensive activation measurements on the stable 89Y isotope, and from a previous activation measurement on the unstable 88Y ground state. However, until now the branching ratios to the ground state and excited isomers in 88Y via the 89Y (n,2n) reaction were not well known, and furthermore, uncertainty estimates were not available for these cross sections and branching ratios. This paper describes how gamma-ray transitions between states in (n,2n) and (n,n') reactions measured using the GEANIE detector at Los Alamos' LANSCE facility, together with theory predictions using the GNASH code, enable us to determine these quantities for the ENDF/B-VII evaluation. A previous measurement by Dietrich, at Livermore, provided important complementary information to the GEANIE analysis. We describe an uncertainty quantification analysis that uses the GNASH-KALMAN approach to evaluate cross sections for the 89Y (n,2n) population of the 88Y ground state and two meta-stable isomers (m1 and m2), along with their uncertainties. Our new results agree with Arthur's historic Los Alamos evaluated cross sections within a few percent below 15 MeV (with larger differences above 15 MeV). The (n,2n) cross sections to the 88Y ground state and m1, m2 isomers impact the average 88Y(n,2n)87Y cross section at leading-order; we determine this 14.1 MeV average cross section 88Y(n,2n)87Y = 1107 mb (± 4%), which agrees with the value obtained from Arthur's evaluation to 0.7%. An alternative method to predict cross sections, uncertainties, and covariance data, is described that uses the European TALYS reaction modeling code and a Backward-Forward Monte-Carlo uncertainty quantification technique. This approach uses a microscopic optical model, together with Hauser-Feshbach and preequilibrium reaction mechanisms, and the underlying model parameters and their uncertainties and correlations are determined through a Monte-Carlo filtering method based on comparisons with measured cross section data. We compare the results obtained using this approach with the GNASH-KALMAN method. The evaluated cross sections are rather similar in the two approaches. We show how the uncertainty information, as embodied in the resulting covariance matrices, is also qualitatively similar in both approaches.

Chadwick, M. B.; Kawano, T.; Talou, P.; Bauge, E.; Hilaire, S.; Dossantos-Uzarralde, P.; Garrett, P. E.; Becker, J. A.; Nelson, R. O.

2007-12-01

275

Yttrium ENDF/B-VII Data from Theory and LANSCE/GEANIE Measurements and Covariances Estimated using Bayesian and Monte-Carlo Methods  

SciTech Connect

Yttrium plays an important role as a radiochemical dosimetry detector for determining high energy 14 MeV neutron fluences, through measurement of (n,2n) activation products. The total (n,2n) cross section is known rather well from extensive activation measurements on the stable {sup 89}Y isotope, and from a previous activation measurement on the unstable {sup 88}Y ground state. However, until now the branching ratios to the ground state and excited isomers in {sup 88}Y via the {sup 89}Y (n,2n) reaction were not well known, and furthermore, uncertainty estimates were not available for these cross sections and branching ratios. This paper describes how gamma-ray transitions between states in (n,2n) and (n,n') reactions measured using the GEANIE detector at Los Alamos' LANSCE facility, together with theory predictions using the GNASH code, enable us to determine these quantities for the ENDF/B-VII evaluation. A previous measurement by Dietrich, at Livermore, provided important complementary information to the GEANIE analysis. We describe an uncertainty quantification analysis that uses the GNASH-KALMAN approach to evaluate cross sections for the {sup 89}Y (n,2n) population of the {sup 88}Y ground state and two meta-stable isomers (m1 and m2), along with their uncertainties. Our new results agree with Arthur's historic Los Alamos evaluated cross sections within a few percent below 15 MeV (with larger differences above 15 MeV). The (n,2n) cross sections to the {sup 88}Y ground state and m1, m2 isomers impact the average {sup 88}Y(n,2n){sup 87}Y cross section at leading-order; we determine this 14.1 MeV average cross section {sup 88}Y(n,2n){sup 87}Y = 1107 mb ({+-} 4%), which agrees with the value obtained from Arthur's evaluation to 0.7%. An alternative method to predict cross sections, uncertainties, and covariance data, is described that uses the European TALYS reaction modeling code and a Backward-Forward Monte-Carlo uncertainty quantification technique. This approach uses a microscopic optical model, together with Hauser-Feshbach and preequilibrium reaction mechanisms, and the underlying model parameters and their uncertainties and correlations are determined through a Monte-Carlo filtering method based on comparisons with measured cross section data. We compare the results obtained using this approach with the GNASH-KALMAN method. The evaluated cross sections are rather similar in the two approaches. We show how the uncertainty information, as embodied in the resulting covariance matrices, is also qualitatively similar in both approaches.

Chadwick, M.B. [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)], E-mail: mbchadwick@lanl.gov; Kawano, T.; Talou, P. [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Bauge, E.; Hilaire, S.; Dossantos-Uzarralde, P. [CEA DAM Ile-de-France, Departement de Physique Theorique et Appliquee, Service de Physique Nucleaire, BP 12, 91680 Bruyeres-le-Chatel (France); Garrett, P.E. [Dept. of Physics, University of Guelph, Guelph, Ontario, N1G 2W1 (Canada); Becker, J.A. [Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States); Nelson, R.O. [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

2007-12-15

276

The comparative behaviors of Yttrium and Lanthanides in the seawater of the North Pacific  

Microsoft Academic Search

Yttrium has long been recognized as an ekalanthanide, because of its chemical contiguity relative to the chemistries of rare earth elements which are, in recent years, intensively utilized for elucidation of metal scavenging processes in the ocean. Here, we present the first detailed depth-profile of Y(III) in seawater together with the lanthanides in the North Pacific Ocean. The concentrations of

J. Zhang; H. Amakawa; Y. Nozaki

1994-01-01

277

Interaction of a moving domain wall with surface magnetoelastic waves in yttrium orthoferrite  

NASA Astrophysics Data System (ADS)

The amplitude-frequency characteristics of magnetoelastic surface waves excited by moving domain walls in a lamellar yttrium orthoferrite samples are discovered and measured. The results of analysis of the effect of magnetoelastic surface waves on the dynamics of domain walls in this orthoferrite are considered. The nonlinear interaction between magnetoelastic surface waves accompanying a moving domain wall is analyzed.

Kuz'menko, A. P.; Zhukov, E. A.; Shcherbakov, Yu. I.

2008-11-01

278

Determination of the Crystal Structure of Yttrium Orthoferrite and Refinement of Gadolinium Orthoferrite.  

National Technical Information Service (NTIS)

The crystal structure of yttrium orthoferrite has been determined from full three-dimensional counter data and refined in the space group Pbnm by least squares to an accuracy of about .001 and .01A in positional parameters of Y(3+) and O(2-) respectively....

M. Eibschutz P. Coppens

1964-01-01

279

Quasirelativistic, gyroscopic dynamics of antiferromagnetic vortices on quasirelativistic domain wall of an yttrium orthoferrite [rapid communication  

NASA Astrophysics Data System (ADS)

Dynamics of antiferromagnetic vortices accompanied by solitary deflection waves on moving domain wall of an yttrium orthoferrite was investigated experimentally using real time two-fold high speed digital photography. The dynamics is quasirelativistic, gyroscopic with the limiting velocity c=20 km/s equal to the spin-wave velocity on a linear part of its dispersion curve.

Chetkin, M. V.; Kurbatova, Yu. N.; Shapaeva, T. B.; Borschegovsky, O. A.

2005-04-01

280

Aquatic geochemistry of the rare earth elements and yttrium in the Pioneer River catchment, Australia  

Microsoft Academic Search

The rare earth elements are strong provenance indicators in geological materials, yet the potential for tracing provinciality in surface freshwater samples has not been adequately tested. Rare earth element and yttrium concentrations were measured at 33 locations in the Pioneer River catchment, Mackay, central Queensland,Australia. The rare earth element patterns were compared on the basis of geological, topographical and land-use

Michael G. LawrenceA; Stacy D. JupiterB; Balz S. KamberC

2006-01-01

281

Interaction of optical waveguide modes with spin waves in an yttrium iron garnet film  

Microsoft Academic Search

Experiments have been carried out in order to investigate the interaction of optical waveguide modes with spin waves in yttrium-iron-garnet films. The waves were excited using an array of copper wire antennas placed 4 mm apart. The light source for the experiments was a He + Ne laser operating at a wavelength of 1.15. In order to study the mode

O. G. Rutkin; N. G. Kovshikov; A. A. Stashkevich; B. A. Kalinkios; A. N. Ageev

1985-01-01

282

Ultrapurification of yttrium metal from oxide to single crystal: results and perspectives  

Microsoft Academic Search

A proposed technique of ultrahigh purity metal single crystal preparation consisting of obtained high purity anhydrous yttrium chloride from its oxide, the reduction of chloride by lithium in gas phase, vacuum remelting and solid state electrotransport (SSE) in UHV is presented and discussed. Data on the behavior of impurities for each stage are listed. It was found that the major

V. T. Volkov; A. M. Ionov; T. V. Nikiforova

1999-01-01

283

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

284

Removal of arsenite and arsenate ions from aqueous solution by basic yttrium carbonate  

Microsoft Academic Search

A new method has been developed to remove arsenite and arsenate ions from aquatic systems by using basic yttrium carbonate (BYC). Various parameters such as pH, anion concentration and reaction time were studied to establish optimum conditions. The removal by adsorption of arsenite and arsenate ions was found to be > 99% depending on initial concentration in the pH range

Syed A. Wasay; Akira Uchiumi; Shuzo Tokunaga

1996-01-01

285

Calculation of Neutron Cross Sections on Isotopes of Yttrium and Zirconium.  

National Technical Information Service (NTIS)

Multistep Hauser-Feshbach calculations with preequilibrium corrections were made for neutron-induced reactions on yttrium and zirconium isotopes between 0.001 and 20 MeV. Recently new neutron cross-section data have been measured for unstable isotopes of ...

E. D. Arthur

1979-01-01

286

Magneto-Optical Kerr Effects of Yttrium-Iron Garnet Thin Films Incorporating Gold Nanoparticles  

Microsoft Academic Search

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

Satoshi Tomita; Takeshi Kato; Shigeru Tsunashima; Satoshi Iwata; Minoru Fujii; Shinji Hayashi

2006-01-01

287

Measurement of diffusion coefficients of francium and rubidium in yttrium based on laser spectroscopy  

Microsoft Academic Search

We report the measurement of the diffusion coefficients of francium and rubidium ions implanted in a yttrium foil. We developed a methodology, based on laser spectroscopy, which can be applied to radioactive and stable species, and allows us to directly take record of the diffusion time. Francium isotopes are produced via fusion-evaporation nuclear reaction of a O18 beam on a

C. de Mauro; R. Calabrese; L. Corradi; A. Dainelli; A. Khanbekyan; E. Mariotti; P. Minguzzi; L. Moi; S. Sanguinetti; G. Stancari; L. Tomassetti; S. Veronesi

2008-01-01

288

Unusual doublet structure in proton magnetic-resonance spectra of yttrium and lutetium trihydrides  

Microsoft Academic Search

The proton magnetic resonance spectra of yttrium and lutetium trihydride, Y H3 and Lu H3 , respectively, show an unusual doublet structure qualitatively similar to the Pake doublet that results from the mutual dipolar interaction of closely spaced, isolated proton pairs. However, both the magnitude of the splittings, roughly 70 kHz , and the second moment of the spectra, roughly

G. Majer; A. Telfah; F. Grinberg; R. G. Barnes

2004-01-01

289

31P,89Y shift correlation. Application to the speciation of yttrium complexes with triphenylphosphine oxide.  

PubMed

Correlation experiments between (89)Y and (31)P nuclei through scalar coupling using (31)P detection are described for the first time. The utility of the new method of characterizing (89)Y is demonstrated by identifying the species formed in the reaction of yttrium nitrate with triphenylphosphine oxide in THF solution. PMID:21246148

Fernández, Ignacio; Yañez-Rodríguez, Víctor; López Ortiz, Fernando

2011-01-19

290

Vibration Spectra of Yttrium and Uranium Hydrides by the Inelastic Scattering of Cold Neutrons  

Microsoft Academic Search

The vibration spectra of the hydrides and deuterides of yttrium and uranium have been investigated by the energy-gain scattering of cold neutrons. The measured spectra are all split into two bands, one at higher energies, due to the optical hydrogen vibrations, and another at lower energies due to metal—atom vibrations. Values have been obtained for the peaks and widths of

J. J. Rush; H. E. Flotow; D. W. Connor; C. L. THAPERt

1966-01-01

291

Proposed method for remote thermometry in turbine engines. [Eu-doped yttrium oxide  

SciTech Connect

The method uses laser-induced fluorescence from a pulsed uv laser to excite a rare-earth-oxide phosphor bonded in a thin layer to the surface to be measured. The luminescent decay times of certain lines are temperature-dependent. Initial results indicate that at least one phosphor, europium-doped yttrium oxide, is usable to 950/sup 0/C. (DLC)

Noel, B.W.; Cates, M.R.; Allison, S.W.; Borella, H.M.; Franks, L.A.; Marshall, B.R.

1985-01-01

292

Transformation of yttrium-doped hydrated zirconium into tetragonal and cubic nanocrystalline zirconia  

SciTech Connect

Nanostructured yttrium-stabilized zirconia powders, with yttria concentrations between 0.0 and 10.0 mol%, were prepared via the hydrolysis of an aqueous solution of zirconyl and yttrium chloride, and ammonium hydroxide. Powder phases were characterized by using X-ray powder diffraction; their crystalline structures were refined with the Rietveld technique. When samples were annealed below 200 C, their diffraction patterns corresponded to an amorphous atom distribution and were independent of yttria concentration. The doped amorphous phases crystallized, at 400 C, into tetragonal or cubic nanocrystalline zirconia, which were stabilized by yttrium. These results suggest that yttrium atoms served as a substitute for zirconium atoms not only in the crystalline phases but also in the amorphous phases, which are determined by the fast condensation of zirconyl clusters. Nondoped samples contained a mixture of monoclinic and tetragonal nanocrystalline zirconia; those with 2.5 to 5.0 mol% yttria contained only the tetragonal zirconia nanophase, and those with 7.5 to 10.0 mol% had only the nanocrystalline cubic phase. The average crystallite size of the nanophases diminished when Y{sub 2}O{sub 3} concentration was increased.

Bokhimi, X.; Morales, A. [National Univ. of Mexico (Mexico). Inst. of Physics; Garcia-Ruiz, A. [National Polytechnic Inst., Mexico Distrito Federal (Mexico); Xiao, T.D. [Inframat Corp., North Haven, CT (United States); Chen, H.; Strutt, P.R. [Univ. of Connecticut, Storrs, CT (United States). Precision Mfg. Center

1999-02-01

293

Effect of Yttrium Additions on Void Swelling in Liquid Metal Fast Breeder Reactor Candidate Cladding Alloys.  

National Technical Information Service (NTIS)

Candidate Liquid Metal Fast Breeder Reactor cladding alloys AL1 (Fe-26% Ni-9% Cr) and AL2 (Fe-35% Ni-12% Cr) without and with the addition of 0.1% yttrium were bombarded by 4 MeV exp 56 Fe exp 2+ ions without and with simultaneous bombardment by 0.4 MeV e...

R. D. Hopson

1981-01-01

294

Determination of Yttrium in Lanthanum Oxide by PTFE Flourinating Technique Combined with ETV-ICP-AES.  

National Technical Information Service (NTIS)

In this study, fluorinating vaporization combined with ETV-ICP-AES technique was used to determine yttrium for which refractory carbide is easily formed. The absolute detection limit is 12 pg, and three-order magnitude of improvement is obtained in compar...

M. Huang Z. C. Jiang Y. E. Zeng

1995-01-01

295

Extravazation of therapeutic yttrium-90-ibritumomab tiuxetan (zevalin): a case report.  

PubMed

The occurrence of radiation necrosis to the extravasation of therapeutic radionuclide-yttrium-90-ibritumomab tiuxetan-is described, as well as the subsequent steps taken to both address the occurrence and to prevent the re-occurrence of such an adverse event. Published reports on the extravasation of diagnostic and therapeutic radionuclides are reviewed, as are prevention and treatment protocols. PMID:16706630

Williams, Gethin; Palmer, Matthew R; Parker, J Anthony; Joyce, Robin

2006-04-01

296

Neodymium YAG (yttrium-aluminum-garnet) lasers. (Latest citations from the Inspec database). Published Search  

SciTech Connect

The bibliography contains citations concerning the properties and applications of neodymium-yttrium-aluminum-garnet (Nd:YAG) lasers. Applications include welding, soldering of printed circuit boards, medical applications, telecommunication systems, rangefinding, and optical pumping of high powered lasers.(Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

NONE

1996-02-01

297

Neodymium YAG (yttrium-aluminum-garnet) lasers. (Latest citations from the INSPEC database). Published Search  

SciTech Connect

The bibliography contains citations concerning the properties and applications of neodymium-yttrium-aluminum-garnet (Nd:YAG) lasers. Applications include welding, soldering of printed circuit boards, medical applications, telecommunication systems, rangefinding, and optical pumping of high powered lasers. (Contains 250 citations and includes a subject term index and title list.)

NONE

1995-03-01

298

Oscillator strengths for Y I and Y II and the solar abundance of yttrium  

SciTech Connect

Oscillator strengths have been determined from measurements of radiative lifetimes and branching ratios for 154 lines of Y I and 66 lines of Y II. These data are used, together with equivalent widths measured on the Jungfraujoch solar atlas, to perform a new determination of the solar abundance of yttrium: A/sub Y/ = 2.24 +- 0.03.

Hannaford, P.; Lowe, R.M.; Grevesse, N.; Biemont, E.; Whaling, W.

1982-10-15

299

Raman scattering study of Czochralski-grown yttrium flouride single crystals  

Microsoft Academic Search

Single crystals of yttrium fluoride YF[sub 3] have been grown by the Czokralski method and studied by Raman scattering in the temperature range 20 K - 730 K. The results are consistent with the prediction of the group theory analysis in the framework of the space group Pnma although two lines B2g are missing. There is no evidence for any

K. Rotereau; J. Y. Gesland; P. Daniel; A. Bulou

1993-01-01

300

The Effect of Yttrium and Thorium on the Oxidation Behavior of Ni-Cr-al Alloys.  

National Technical Information Service (NTIS)

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 kine...

A. Kumar M. Nasrallah D. L. Douglass

1974-01-01

301

X-band phased array antennas using crystal yttrium-iron-garnet phase shifters  

NASA Astrophysics Data System (ADS)

X-band phased array antenna containing four linear microstrip patch elements has been fabricated and tested. The elements were fed through single-crystal yttrium-iron-garnet phase shifters. By varying the bias magnetic field the input phases to the antenna elements can thus be tuned, resulting in steering of the radiation beam in one dimension.

How, Hoton; Shi, Pin; Vittoria, Carmine; Champion, M. H.; Kempel, Leo C.; Trott, Keith D.

2000-05-01

302

Magnetic properties of rare-earth fluorides with potassium yttrium fluoride structure  

Microsoft Academic Search

Magnetic properties of compounds possessing the cubic KY3F 10 structure were investigated for the rare earth ions (Yb, Tm, Er, Ho, Dy, Tb, Gd, and Sm) in the Yttrium crystal sites. The compounds have a novel magnetic ion structure containing three independent magnetic sites, with each site having g|| oriented along a different x, y, or z crystallographic axis. Magnetic

Stephen Lowell Chamberlain

2000-01-01

303

Observation of parametric amplification of propagating dipole-exchange spin waves in yttrium iron garnet films  

Microsoft Academic Search

Amplification of a weak-signal spin wave by a strong pump spin wave propagating in an yttrium iron garnet film is observed\\u000a for the first time. A theoretical explanation of the amplification phenomenon is suggested on the basis of the four-wave parametric\\u000a processes.

B. A. Kalinikos; N. G. Kovshikov; M. P. Kostylev; H. Benner

1996-01-01

304

GROWTH OF SINGLE CRYSTALS OF INCONGRUENTLY MELTING YTTRIUM IRON GARNET BY FLAME FUSION PROCESS  

Microsoft Academic Search

Single crystals of yttrium iron garnet (YâFeâOââ) were ; grown using the flame fusion process, even though the compcund is reported to ; melt incongruently. The growth of these single crystals involves a mechanism ; different from that which has been proposed for the growth of single crystals of ; incongruently melting mullite. Crystal boules were grown at varying linear

R. G. Rudness; R. W. Kebler

1960-01-01

305

Effects of yttrium on microstructure and mechanical properties of hot-extruded Mg–Zn–Y–Zr alloys  

Microsoft Academic Search

This article studied the effects of yttrium on microstructure and mechanical properties of extruded Mg–Zn–Y–Zr alloys. Three kinds of Mg–5.5Zn–xY–0.4Zr alloys with variable yttrium content were hot-extruded at different temperature to investigate the microstructure evolution and dynamic recrystallization (DRX) process of these alloys. The alloys with low yttrium content as 0.74 or 1.35wt.% consist of ?-Mg and large I-phase particles,

Ya Zhang; Xiaoqin Zeng; Liufa Liu; Chen Lu; Hantao Zhou; Qiang Li; Yanping Zhu

2004-01-01

306

Intra-articular yttrium 90 in rabbits. Comparison of behaviour of various radiocolloids in rabbits and in man.  

PubMed Central

Comparative studies of the retention of various yttrium 90 radiocolloids and of noncolloidal yttrium 90 chloride were performed in rabbits with arthritis induced in one knee. Two colloids, the citrate and resin forms, showed a statistically significant difference in retention between inflamed and normal knees, isotope being retained better in the normal knee. Marked differences were found in the handling of the various yttrium preparations in rabbits compared with previously reported results in man. These differences suggest that the rabbit with induced arthritis is not a suitable model in which to test retention of different radiocolloids before use in man.

Gumpel, J M

1978-01-01

307

PI-88 and novel heparan sulfate mimetics inhibit angiogenesis.  

PubMed

The heparan sulfate (HS) mimetic PI-88 is a promising inhibitor of tumor growth and metastasis expected to commence phase III clinical evaluation in 2007 as an adjuvant therapy for postresection hepatocellular carcinoma. Its anticancer properties are attributed to inhibition of angiogenesis via antagonism of the interactions of angiogenic growth factors and their receptors with HS. It is also a potent inhibitor of heparanase, an enzyme that plays a key role in both metastasis and angiogenesis. A series of PI-88 analogs have been prepared with enhanced chemical and biological properties. The new compounds consist of single, defined oligosaccharides with specific modifications designed to improve their pharmacokinetic properties. These analogs all inhibit heparanase and bind to the angiogenic fibroblast growth factor 1 (FGF-1), FGF-2, and vascular endothelial growth factor with similar affinity to PI-88. However, compared with PI-88, some of the newly designed compounds are more potent inhibitors of growth factor-induced endothelial cell proliferation and of endothelial tube formation on Matrigel. Representative compounds were also tested for antiangiogenic activity in vivo and were found to reduce significantly blood vessel formation. Moreover, the pharmacokinetic profile of several analogs was also improved, as evidenced primarily by lower clearance in comparison with PI-88. The current data support the development of HS mimetics as potent antiangiogenic anticancer agents. PMID:17629854

Ferro, Vito; Dredge, Keith; Liu, Ligong; Hammond, Edward; Bytheway, Ian; Li, Caiping; Johnstone, Ken; Karoli, Tomislav; Davis, Kat; Copeman, Elizabeth; Gautam, Anand

2007-07-01

308

Cyclotron production for the radiometal Zirconium-89 with an IBA cyclone 18/9 and COSTIS solid target system (STS)  

NASA Astrophysics Data System (ADS)

The development of biological targeting agents such as proteins, peptides, antibodies and nanoparticles with a range of biological half-lives demands the production of new radionuclides with half-lives (physical) complementary to these biological properties. Zirconium-89 (89Zr) is a promising radionuclide for development of new immuno-PET agents due to its convenient half-life of 78.4 h, ?+ emission rate of 23%, low maximum energy of 0.9 MeV resulting in good spatial resolution, stable daughter isotope of Yttrium-89 (89Y) and favorable imaging characteristics, with only one significant ?-line of 909 keV emitted during decay alongside the 511 keV positron photons. Our aim was to prove that isotopically pure 89Zr could be produced in an IBA Cyclone 18/9 cyclotron equipped with a COSTIS STS using the 89Y(p,n)89Zr reaction and optimise the yield by reducing the beam degrader thickness without producing either 88Zr or 88Y. The degradation of the beam energy with 400 and 500 ?m thick Niobium foils were achieved without overheating problems with 2-3 hours long irradiation times. From repeated measurements of activity, it was clear that there is a bi-exponential decay of radioactivity due to the short lived 89mZr and 89Zr. The measured half-life of the longer lived radionulide was consistent with value for 89Zr. The energy spectrum from 89Zr had energy peaks at 511 keV and 909 keV and was consistent with 89Zr. Production of 89Zr with 500 ?m thick Niobium beam degrader (Ep = 9.8MeV) was achieved, without producing either 88Zr or 88Y. It was necessary to wait at least 4 hours before measuring the activity and decay correct in order to calculate the 89gZr activity at the end of cyclotron production. Degrading the proton beam to 10 MeV produces radionuclidically pure 89Zr with yields from 8 to 9 MBq/?Ah. Whilst this is enough for pre-clinical use, the yield is not enough for either clinical use or commercial supply. Using thinner beam degraders to increase the proton beam energy increases the radionuclidic yield but it is not yet possible to exclude the presence of radionuclidic impurities.

Dabkowski, A. M.; Probst, K.; Marshall, C.

2012-12-01

309

Vav proteins control MyD88-dependent oxidative burst.  

PubMed

The importance of reactive oxygen intermediate (ROI) production in antimicrobial responses is demonstrated in human patients who suffer from chronic granulomatous disease (CGD) due to defective NADPH oxidase function. Exactly how bacterial products activating Toll-like receptors (TLRs) induce oxidative burst is unknown. Here, we identify the Vav family of Rho guanine nucleotide exchange factors (GEFs) as critical mediators of LPS-induced MyD88-dependent activation of Rac2, NADPH oxidase, and ROI production using mice deficient in Vav1, Vav2, and Vav3. Vav proteins are also required for p38 MAPK activation and for normal regulation of proinflammatory cytokine production, but not for other MyD88-controlled effector pathways such as those involving JNK, COX2, or iNOS and the production of reactive nitrogen intermediates (RNIs). Thus, our data indicate that Vav specifically transduces a subset of signals emanating from MyD88. PMID:17158234

Miletic, Ana V; Graham, Daniel B; Montgrain, Vivianne; Fujikawa, Keiko; Kloeppel, Tracie; Brim, Karry; Weaver, Brian; Schreiber, Robert; Xavier, Ramnik; Swat, Wojciech

2006-12-07

310

Cooling and Trapping 88Sr Atoms with 461 nm Laser  

NASA Astrophysics Data System (ADS)

We report the experimental realization of a 88Sr magneto-optical trap (MOT) operating at the wavelength of 461 nm. The MOT is loaded via a 32 cm long spin-flip type Zeeman slower which enhances the MOT population by a factor of 22. The total laser power available in our experiment is about 300 mW. We have trapped 1.6 × 108 88Sr atoms with a 679nm and 707 nm repumping laser. The two repumping lasers enhance the trap population and trap lifetime by factors of 11 and 7, respectively. The 88Sr cloud has a temperature of about 2.3 mK, measured by recording the time evolution of the absorption signal.

Wang, Shao-Kai; Wang, Qiang; Lin, Yi-Ge; Wang, Min-Ming; Lin, Bai-Ke; Zang, Er-Jun; Li, Tian-Chu; Fang, Zhan-Jun

2009-09-01

311

Bibliography of Soviet laser developments, Number 88, March-April 1987  

SciTech Connect

This is the Soviet Laser Bibliography for March-April 1987, and is No. 88 in a continuing series on Soviet laser developments. The coverage includes basic research on solid state, liquid, gas, and chemical lasers components; nonlinear optics; spectroscopy of laser materials; ultrashort pulse generation; theoretical aspects of advanced lasers; and general laser theory. Laser applications are listed under biological effects; communications systems; beam propagation; adaptive optics; computer technology; holography; laser-induced chemical reactions; measurement of laser parameters; laser measurement applications laser-excited optical effects; laser spectroscopy; beam-target interaction; and plasma generation and diagnostics.

Not Available

1988-03-03

312

Spectroscopy of 88Y by the (p,d ) Reaction  

SciTech Connect

Low-spin, high-excitation energy states in 88Y have been studied using the 89Y(p,d ) reaction. For this experiment a 25 MeV proton beam was incident upon a monoisotopic 89Y target. A silicon telescope array was used to detect deuterons, and coincident rays were detected using a germanium clover array. Most of the known low-excitation-energy low-spin states populated strongly via the (p, d) reaction mechanism are confirmed. Two states are seen for the first time and seven new transitions, including one which bypasses the two low-lying isomeric states, are observed.

Ross, T.J. [University of Richmond; Beausang, C.W. [University of Richmond; Hughes, R.O. [University of Richmond; Scielzo, N.D. [Lawrence Livermore National Laboratory (LLNL); Burke, J.T. [Lawrence Livermore National Laboratory (LLNL); Allmond, James M [ORNL; Angell, C.T. [Lawrence Berkeley National Laboratory (LBNL); Basunia, M.S. [Lawrence Berkeley National Laboratory (LBNL); Bleuel, D.L. [Lawrence Livermore National Laboratory (LLNL); Casperson, R.J. [Lawrence Livermore National Laboratory (LLNL); Escher, J.E. [Lawrence Livermore National Laboratory (LLNL); Fallon, P. [Lawrence Berkeley National Laboratory (LBNL); Hatarik, R. [Lawrence Berkeley National Laboratory (LBNL); Munson, J. [Lawrence Berkeley National Laboratory (LBNL); Paschalis, S. [Lawrence Berkeley National Laboratory (LBNL); Petri, M. [Lawrence Berkeley National Laboratory (LBNL); Phair, L. [Lawrence Berkeley National Laboratory (LBNL); Ressler, J.J. [Lawrence Livermore National Laboratory (LLNL)

2012-01-01

313

Half-life determination of 88Kr and 138Xe.  

PubMed

The half-lives of (88)Kr and (138)Xe have been determined with two high purity germanium (HPGe) detectors by the position relay method. Data have been recorded at regular time intervals during measurements covering more than nine times the respective half-lives. This article describes in detail the principle and process of the position relay method with two HPGe detectors. The determined half-lives of (88)Kr and (138)Xe are 2.804±0.015 h and 14.18±0.10 min, respectively. PMID:22424743

Wang, Shi-lian; Bai, Tao; Li, Qi; Chen, Zhan-ying; Shi, Quan-lin; Li, Xue-song; Zhang, Xiao-lin; Xie, Feng; Chang, Yong-fu

2012-02-25

314

Influence of gamma -Irradiation on the Electrical Resistance of Yttrium Dopped BaTiO sub 3.  

National Technical Information Service (NTIS)

The behaviour of electrical resistance of irradiated yttrium dopped BaTiO sub 3 thermistors with positive temperature coefficient of resistance as a function of temperature is investigated. Calculations of the shift of the Curie transition temperature due...

I. Bunget A. Ludu M. Ludu P. Nicolau

1984-01-01

315

Comparison of the erbium-yttrium aluminum garnet and carbon dioxide lasers for in vitro bone and cartilage ablation  

SciTech Connect

The in vitro bone- and cartilage-ablation characteristics of the solid-state erbium:yttrium aluminum garnet laser were compared to those of the carbon dioxide laser. Ablations of fresh, frozen cadaver septal cartilage and maxillary sinus bone were performed using total energies between 1 and 6 J. Specimens were studied using hematoxylin and eosin stain and digitized, computer-assisted measurements of 35-mm photographs. Erbium-yttrium aluminum garnet-ablated bone averaged 5 microns of adjacent tissue thermal injury, compared with 67 microns with carbon dioxide-ablated bone. Erbium-yttrium aluminum garnet-ablated cartilage averaged 2 microns of adjacent tissue thermal injury, compared with 21 microns with the carbon dioxide-ablated cartilage. The tissue-ablation characteristics of the erbium-yttrium aluminum garnet laser are promising for future otolaryngologic applications.

Gonzalez, C.; van de Merwe, W.P.; Smith, M.; Reinisch, L. (Uniformed Services Univ. of the Health Sciences, Bethesda, MD (USA))

1990-01-01

316

Effect of yttrium on diffusion layer of Ni-Al-Mo-B alloy IC6 during high temperature oxidation process  

SciTech Connect

One of the critical requirements for a protective oxide scale on an alloy substrate to provide high temperature environmental resistance is that the scale should be adherent to the substrate. A directionally solidified (DS) alloy IC6 has been recently developed as a high-temperature structural material used for advanced jet-engine blades and vanes operating in the temperature range of 1,050-1,150 C. Its high temperature oxidation resistance is substantially improved by adding proper amounts of yttrium, which is attributed to several beneficial roles played by yttrium. One of the beneficial effects is that yttrium can inhibit the transportation of cations and hence decrease the increasing rate of the depth of the diffusion layer formed during high temperature oxidation process. The purpose of this paper is to investigate the effect of yttrium on the diffusion layer.

Xiao, C.; Han, Y.

1999-11-05

317

Absence of MyD88 Signaling Induces Donor-Specific Kidney Allograft Tolerance  

PubMed Central

Toll-like receptors (TLRs) play a fundamental role in innate immunity and provide a link between innate and adaptive responses to an allograft; however, whether the development of acute and chronic allograft rejection requires TLR signaling is unknown. Here, we studied TLR signaling in a fully MHC-mismatched, life-sustaining murine model of kidney allograft rejection. Mice deficient in the TLR adaptor protein MyD88 developed donor antigen-specific tolerance, which protected them from both acute and chronic allograft rejection and increased their survival after transplantation compared with wild-type controls. Administration of an anti-CD25 antibody to MyD88-deficient recipients depleted CD4+CD25+FoxP3+ cells and broke tolerance. In addition, defective development of Th17 immune responses to alloantigen both in vitro and in vivo occurred, resulting in an increased ratio of Tregs to Th17 effectors. Thus, MyD88 deficiency was associated with an altered balance of Tregs over Th17 cells, promoting tolerance instead of rejection. This study provides evidence that targeting innate immunity may be a clinically relevant strategy to facilitate transplantation tolerance.

Noordmans, Gerda A.; O'Brien, Maya R.; Ma, Jin; Zhao, Cathy Y.; Zhang, Geoff Y.; Kwan, Tony K.T.; Alexander, Stephen I.; Chadban, Steven J.

2012-01-01

318

Copolymerization of CO 2 and propylene oxide under rare earth ternary catalyst: design of ligand in yttrium complex  

Microsoft Academic Search

Copolymerization of carbon dioxide and propylene oxide was carried out employing (RC6H4COO)3Y\\/glycerin\\/ZnEt2 (R=–H, –CH3, –NO2, –OH) ternary catalyst systems. The feature of yttrium carboxylates (ligand, substituent and its position on the aromatic ring) is of great importance in the final copolymerization. Appropriate design of substituent and position of the ligand in benzoate-based yttrium complex can adjust the microstructure of aliphatic

Zhilong Quan; Xianhong Wang; Xiaojiang Zhao; Fosong Wang

2003-01-01

319

In Situ High-Temperature X-Ray Diffraction Characterization of Yttrium-Implanted Extra Low-Carbon Steel  

Microsoft Academic Search

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

E. Caudron; H. Buscail; S. Perrier

1999-01-01

320

Impact of yttrium ion implantation on corrosion behavior of laser beam welded zircaloy-4 in sulfuric acid solution  

Microsoft Academic Search

In order to study the effect of yttrium ion implantation on the aqueous corrosion behavior of laser beam welded zircaloy-4 (LBWZr4), The butt weld joint of zircaloy-4 was made by means of a carbon dioxide laser, subsequently the LBWZr4 samples were implanted with yttrium ion using a MEVVA source at an energy of 40keV, with a fluence range from 1×1016

Qian Wan; Xinde Bai; Xiaoyang Liu

2005-01-01

321

Comparison of the erbium-yttrium aluminum garnet and carbon dioxide lasers for in vitro bone and cartilage ablation  

Microsoft Academic Search

The in vitro bone- and cartilage-ablation characteristics of the solid-state erbium:yttrium aluminum garnet laser were compared to those of the carbon dioxide laser. Ablations of fresh, frozen cadaver septal cartilage and maxillary sinus bone were performed using total energies between 1 and 6 J. Specimens were studied using hematoxylin and eosin stain and digitized, computer-assisted measurements of 35-mm photographs. Erbium-yttrium

Carlos Gonzalez; Willem P. Van De Merwe; Michael Smith; Lou Reinisch

1990-01-01

322

Efficient synthesis of dimethyl carbonate via transesterification of ethylene carbonate with methanol over binary zinc-yttrium oxides  

Microsoft Academic Search

The binary zinc–yttrium oxides were prepared by co-precipitation method, characterized and tested in the synthesis of DMC via transesterification of ethylene carbonate with methanol. The catalytic results showed that the catalyst with Zn\\/Y molar ratio of 3 and calcined at 400°C exhibited superior catalytic activity, corresponding to TOF of 236mmol\\/gcath. Appropriate content of yttrium in the catalyst enhanced the catalytic

Liguo Wang; Ying Wang; Shimin Liu; Liujin Lu; Xiangyuan Ma; Youquan Deng

2011-01-01

323

Synthesis of Nd 3+ doped nano-crystalline yttrium aluminum garnet (YAG) powders leading to transparent ceramic  

Microsoft Academic Search

Nd-doped yttrium aluminum garnet (Nd:YAG) nano-crystallites were prepared by the co-precipitation method from a mixed solution of yttrium and aluminum nitrate using ammonium hydrogen carbonate as precipitant. The phase transition and structure of the prepared powder were investigated by means of XRD and TEM. The powder showed significantly less agglomeration of crystallites, indicating a high degree of sinterability. Transparent YAG

Xia Li; Qiang Li; Jiyang Wang; Shunliang Yang; Hong Liu

2007-01-01

324

Effects of yttrium on microstructure, mechanical properties and high-temperature wear behavior of cast Stellite 6 alloy  

Microsoft Academic Search

Effects of alloying yttrium on the wear behavior of a commercial wear-resistant alloy, Stellite 6, at elevated temperatures were investigated. Samples of Stellite 6 alloyed with various amounts of yttrium were made using an arc-melting furnace. Structure of the modified Stellite 6 was analyzed using the X-ray diffraction technique (XRD). The wear behavior of the samples at various temperatures from

Linchun Wang; D. Y. Li

2003-01-01

325

Evaluated Iridium, Yttrium, and Thulium Cross Sections and Integral Validation Against Critical Assembly and Bethe Sphere Measurements  

Microsoft Academic Search

We describe new dosimetry (radiochemical) ENDF evaluations for yttrium, iridium, and thulium. These LANL2006 evaluations were based upon measured data and on nuclear model cross section calculations. In the case of iridium and yttrium, new measurements using the GEANIE gamma-ray detector at LANSCE were used to infer (n,xn) cross sections, the measurements being augmented by nuclear model calculations using the

M. B. Chadwick; S. Frankle; H. Trellue; P. Talou; T. Kawano; P. G. Young; R. E. MacFarlane; C. W. Wilkerson

2007-01-01

326

Effect of yttrium on the oxide scale adherence of pre-oxidized silicon-containing heat-resistant alloy  

Microsoft Academic Search

This paper investigates the effect of the rare earth element yttrium on the rupture behaviour of the oxide scale on the silicon-containing heat-resistant alloy during cooling. After 10h of oxidation, yttrium is found to facilitate the formation of internal oxides (silica) at the scale–matrix interface. Due to the twinning observed by scanning transmission electron microscopy (STEM) in silica, the critical

Jingbo Yan; Yimin Gao; Yudi Shen; Fang Yang; Dawei Yi; Zhaozhong Ye; Long Liang; Yingqian Du

2011-01-01

327

Velocity distribution of the yttrium atoms in laser produced plasma  

Microsoft Academic Search

We have investigated the velocity distribution functions of atoms in laser produced plasma. In our experiments plasma is cheated during the laser sputtering of YBa2Cu3O7-x ceramics target. We used KrF excimer laser for target sputtering. All sputtering conditions that were the same as usual for high Tc films deposition are used. We used time-of-flight method to investigate the velocity distribution

Alexander N. Zherikhin; Oleg V. Boyarkin; Vladimir N. Burimov; Vladimir S. Golubev; Valerie L. Popkov

1994-01-01

328

Fact Book on Theological Education, 1987-88.  

ERIC Educational Resources Information Center

|Information is provided on theological education during 1987-88, based on data from 201 of the 204 U.S. and Canadian members of the Association of Theological Schools. Information is included on enrollment, professional staff, and salaries for the current year, and graduation statistics, financial reports, and library data from the previous…

Baumgaertner, William L., Ed.

329

9 CFR 88.5 - Requirements at a slaughtering facility.  

Code of Federal Regulations, 2013 CFR

...PRODUCTS COMMERCIAL TRANSPORTATION OF EQUINES FOR SLAUGHTER § 88.5 Requirements...shipper must: (1) Ensure that each equine has access to appropriate food and potable...Allow a USDA representative access to the equines for the purpose of examination;...

2013-01-01

330

9 CFR 88.3 - Standards for conveyances.  

Code of Federal Regulations, 2013 CFR

...PRODUCTS COMMERCIAL TRANSPORTATION OF EQUINES FOR SLAUGHTER § 88.3 Standards for...used for the commercial transportation of equines for slaughter must: (1) Be designed...protects the health and well-being of the equines being transported (e.g.,...

2013-01-01

331

Uniform 8×8 lithium niobate switch arrays  

Microsoft Academic Search

We report the fabrication and characterization of two packaged 8×8 Ti:LiNbO3 switch arrays. The devices, with their polarization-maintaining fiber arrays, exhibit low crosstalk and excellent uniformity in control voltages and insertion loss

Edmond J. Murphy; Carl T. Kemmerer; David T. Moser; Michael R. Serbin; James E. Watson; Paul L. Stoddard

1995-01-01

332

88. AVALON DAM Photographic copy of construction drawing dated ...  

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

88. AVALON DAM - Photographic copy of construction drawing dated February 9, 1912 (from Record Group 115, Box 17, Denver Branch of the National Archives, Denver) METHOD OF CLOSING UP OLD GATE OPENINGS IN SPILLWAY AND ARRANGEMENT OF TURBINES, OPERATING CYLINDER GATES - Carlsbad Irrigation District, Avalon Dam, On Pecos River, 4 miles North of Carlsbad, Carlsbad, Eddy County, NM

333

45 CFR 88.4 - Requirements and prohibitions.  

Code of Federal Regulations, 2010 CFR

...Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES ...ENSURING THAT DEPARTMENT OF HEALTH AND HUMAN SERVICES...DISCRIMINATORY POLICIES OR PRACTICES § 88.4 Requirements...institutional or individual health care entity to discrimination...contrary to his religious beliefs or moral...

2010-10-01

334

45 CFR 88.4 - Requirements and prohibitions.  

Code of Federal Regulations, 2010 CFR

...Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES ...ENSURING THAT DEPARTMENT OF HEALTH AND HUMAN SERVICES...DISCRIMINATORY POLICIES OR PRACTICES § 88.4 Requirements...institutional or individual health care entity to discrimination...contrary to his religious beliefs or moral...

2009-10-01

335

88. MECHANICAL EQUIPMENT ROOM (101), LSB (BLDG. 770). FEATURES LEFT ...  

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

88. MECHANICAL EQUIPMENT ROOM (101), LSB (BLDG. 770). FEATURES LEFT TO RIGHT: S-2 SUPPLY FAN TO BOOSTER POD, R-4 COMPRESSOR, S-4 SUPPLY FAN TO PAYLOAD (SYSTEM 1). - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

336

LLE Review. Quarterly Report. Volume 88 (July-September 2001).  

National Technical Information Service (NTIS)

The LLE Review 88, covering July through September 2001, begins with an article that describes a simple, low-cost, wide-dynamic-range, neutron bang time (NBT) detector that is currently installed on LLE's OMEGA laser. It is able to measure the neutron ban...

2001-01-01

337

Data mining techniques for improved WSR-88D rainfall estimation  

Microsoft Academic Search

The main objective of this paper is to utilize data mining and an intelligent system, Artificial Neural Networks (ANNs), to facilitate rainfall estimation. Ground truth rainfall data are necessary to apply intelligent systems techniques. A unique source of such data is the Oklahoma Mesonet. Recently, with the advent of a national network of advanced radars (i.e. WSR-88D), massive archived data

T. B Trafalis; M. B Richman; A White; B Santosa

2002-01-01

338

College-Bound Seniors Report 1987-88.  

ERIC Educational Resources Information Center

|This report analyzes the 1987-88 Scholastic Aptitude Test (SAT) scores of Connecticut's college-bound seniors and includes the students' characteristics and their college plans. The SAT, comprised of a verbal and a mathematical section, is part of the College Board's Admissions Testing Program which also includes the Test of Standard Written…

Connecticut State Dept. of Education, Hartford. Bureau of Research, Planning, and Evaluation.

339

Findings from the NELS:88 Base Year Student Survey.  

ERIC Educational Resources Information Center

|The National Education Longitudinal Study of 1988 (NELS:88), a longitudinal study sponsored by the National Center for Education Statistics, provides trend data about transitions experienced as young people develop, attend school, and embark on careers. The study began with a national sample of about 26,000 eighth graders in 1988 and follows…

Ingels, Steven J.

340

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

341

88. Photocopied August 1978 by the Harry S. Truman Library, ...  

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

88. Photocopied August 1978 by the Harry S. Truman Library, Independence, Missouri, from the original belonging to the Watkins Mill Historic Site. HANDBILL WRITTEN BY WALTHUS L. WATKINS, ADVERTISING THE OPENING OF HIS MILL. DATED: MAY 8TH, 1861. - Watkins Mill, County Highway MM, Lawson, Ray County, MO

342

A Further Study of the Beneficial Effects of Yttrium on Oxide Scale Properties and High-Temperature Wear of Stellite 21  

Microsoft Academic Search

Alloying yttrium to Co-based alloys has been proven to considerably improve their oxide scales that play an important role\\u000a in resisting wear at elevated temperatures. In addition to the formation of Y2O3 phase in the oxide scale, the yttrium addition may also change the oxidation mechanism, which could be responsible for many\\u000a benefits of yttrium to the wear resistance of

Iulian Radu; D. Y. Li

2008-01-01

343

Effect of rare earth element yttrium addition on microstructures and properties of a 21Cr–11Ni austenitic heat-resistant stainless steel  

Microsoft Academic Search

In this comparative study, the microstructure and the mechanical properties of a 21Cr–11Ni austenitic heat-resistant stainless steel with and without addition of rare earth (RE) element yttrium have been investigated. The results show that a number of fine spherical yttrium-rich oxide particles are not uniformly distributed in the matrix of steel with yttrium; instead, they are aligned along the rolling

Lei Chen; Xiaocong Ma; Longmei Wang; Xiaoning Ye

2011-01-01

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.

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

2011-01-01

345

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

346

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

347

46 CFR 64.88 - Plan approval, construction, and inspection of cargo-handling systems.  

Code of Federal Regulations, 2012 CFR

...systems. 64.88 Section 64.88 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING MARINE PORTABLE TANKS AND CARGO HANDLING SYSTEMS Cargo Handling System § 64.88 Plan approval,...

2012-10-01

348

MyD88 is essential to sustain mTOR activation necessary to promote T helper 17 cell proliferation by linking IL-1 and IL-23 signaling  

PubMed Central

Myeloid differentiation primary response protein 88 (MyD88) is classically known as an adaptor, linking TLR and IL-1R to downstream signaling pathways in the innate immune system. In addition to its role in innate immune cells, MyD88 has been shown to play an important role in T cells. How MyD88 regulates helper T-cell differentiation remains largely unknown, however. Here we demonstrate that MyD88 is an important regulator of IL-17-producing CD4+ T helper cells (Th17) cell proliferation. MyD88-deficient CD4+ T cells showed a defect in Th17 cell differentiation, but not in Th1 cell or Th2 cell differentiation. The impaired IL-17 production from MyD88-deficient CD4+ T cells is not a result of defective RAR-related orphan receptor ?t (ROR?t) expression. Instead, MyD88 is essential for sustaining the mammalian target of rapamycin (mTOR) activation necessary to promote Th17 cell proliferation by linking IL-1 and IL-23 signaling. MyD88-deficient CD4+ T cells showed impaired mTOR activation and, consequently, reduced Th17 cell proliferation. Importantly, the absence of MyD88 in T cells ameliorated disease in the experimental autoimmune encephalomyelitis model. Taken together, our results demonstrate that MyD88 has a dual function in Th17 cells by delivering IL-1 signaling during the early differentiation stage and integrating IL-23 signaling to the mTOR complex to expand committed Th17 cells.

Chang, JiHoon; Burkett, Patrick R.; Borges, Christopher M.; Kuchroo, Vijay K.; Turka, Laurence A.; Chang, Cheong-Hee

2013-01-01

349

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

350

Yttrium hydride films as switchable mirrors: optical characterization and electronic structure  

NASA Astrophysics Data System (ADS)

The development of switchable mirrors based on yttrium hydride thin films is shown. Yttrium is deposited on regular glass under ultra-high vacuum conditions. Upon hydrogen pressure the transition from light-reflecting metal YH2 to transparent insulating YH3 is induced. Surface and optical characterization is performed to improve the deposition and hydrogenation conditions. A good variable transparency is achieved, with transmittance up to 70% in the visible range for the completely hydrogenated sample. The electronic structure of the YH3 phase is calculated by considering strong correlation corrections to the crystal potential. We obtain a gap in the quasiparticle spectrum that agrees with the optical transmittance of the YH3 phase. A prototype device based on these films is proposed.

Sanchez-Lopez, M. M.; Velasquez, P.; Castaner, R.; Gutierrez, A.; Costa-Quintana, J.; Lopez-Aguilar, F.

2003-11-01

351

Simulation studies to optimize the process of plasma spray deposition of yttrium oxide  

NASA Astrophysics Data System (ADS)

Simulation studies on the thermal behaviour of yttrium oxide particles in a thermal plasma jet was carried out with the objective of controlling and optimization of the plasma spray process. The 'in-flight' behaviour of yttrium oxide particles in the plasma jet was studied by solving the heat transfer and momentum transfer equations using the velocity and temperature distribution in the plasma jet obtained from a two-dimensional model. In particular, the effect of particle size, thermal power of the torch and the torch operating parameters like gas flow rates were considered to calculate the heat transfer and momentum transfer to the particle. Results of simulation studies agree quite well with the experimental results on variation of deposition efficiency with power and particle size. The complete description of the model with the results obtained for the typical operating parameters of our plasma spray torch is presented in the paper.

Thiyagarajan, T. K.; Sreekumar, K. P.; Selvan, V.; Ramachandran, K.; Ananthapadmanabhan, P. V.

2010-02-01

352

Specifics of crystallization of highly refractory alloys based on zirconium, yttrium, and erbium oxides  

Microsoft Academic Search

In production of melted ingots of highly refractory alloys in systems with zirconium, yttrium, and erbium oxides we have identified\\u000a the phenomenon of an increasing specific volume in the course of primary crystallization under unilateral center-symmetric\\u000a heating. The positive values of the volume crystallization effect are presumably due to the emergence of point defect complexes\\u000a in the course of formation

A. A. Frolov; E. R. Anrievskaya; O. A. Kornienko; Yu. A. Frolov

2007-01-01

353

Light emission of double-walled carbon nanotube filaments doped with yttrium and europium  

Microsoft Academic Search

As the potential applications of carbon nanotubes in the field of electroluminescence, elements yttrium and europium were\\u000a introduced to modify the emission properties of double-walled carbon nanotubes (DWNTs) to obtain higher efficacy and other\\u000a properties. The light emission spectrum of the Y-Eu-doped DWNT filament is suppressed in the near-infrared range, while enhanced\\u000a in the mid-infrared range. The doped DWNT filament

QinKe Shu; KunLin Wang; JinQuan Wei; HongWei Zhu; XinMing Li; Xi Chen; Yi Jia; XuChun Gui; ErYang Xu; DeHai Wu

2009-01-01

354

Structure and luminescence spectra of lutetium and yttrium borates synthesized from ammonium nitrate melt  

Microsoft Academic Search

Lutetium and yttrium borates doped with europium, terbium, gadolinium, etc. have been synthesized by dissolving initial oxides and nitrates in ammonium nitrate melt and thermal decomposition of the solvent. Annealings in the range of 500–1100°C modified the dimensions of the grains from 2 to 3nm to more than 100nm. Significant dependence of the structure of lutetium borate on slight doping

Nikolay V. Klassen; Semion Z. Shmurak; Ivan M. Shmyt’ko; Galina K. Strukova; Stephen E. Derenzo; Marvin J. Weber

2005-01-01

355

Reflection of antiferromagnetic vortices on a supersonic domain wall in yttrium orthoferrite  

NASA Astrophysics Data System (ADS)

Reflection of solitary flexural waves propagating in a supersonic domain wall of yttrium orthoferrite from the domain wall part moving with the transverse-sound velocity is observed experimentally. This observation confirms that such a reflection of a solitary flexural wave leads to a change in the sign of the topological charge of the antiferromagnetic vortex accompanied by this wave, which proves a direct relationship between these two objects.

Chetkin, M. V.; Kurbatova, Yu. N.; Shapaeva, T. B.; Borschegovsky, O. A.

2007-04-01

356

Comparative study of yttrium and rare-earth element behaviours in fluorine-rich hydrothermal fluids  

Microsoft Academic Search

The mineral ‘fluorite’ is utilized as a probe to investigate the behaviour of the pseudolanthanide yttrium with respect to the lanthanides (rare-earth elements, REE) in fluorine-rich hydrothermal solutions. Hydrothermal vein fluorites are characterized by the close association of Y and REE, but in contrast to igneous and clastic rocks they show variable and nonchondritic Y\\/Ho ratios of up to 200.

Michael Bau; Peter Dulski

1995-01-01

357

Driven spin-wave dynamics in yttrium–iron–garnet films (abstract)  

Microsoft Academic Search

Yttrium–iron–garnet (YIG) is an important component used in filters and other microwave devices. In this work we investigate the behavior of driven magnetostatic wave modes in rectangular YIG films subject to an in-plane magnetic field. Patterned slotlines and coplanar waveguides are used to drive the film at separate spatial locations with microwave (2–4 GHz) excitations corresponding to the magnetostatic wave

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

1996-01-01

358

Preparation of yttrium, lanthanum, cerium, and neodymium basic carbonate particles by homogeneous precipitation  

Microsoft Academic Search

Uniform yttrium, lanthanum, cerium, and neodymium basic carbonate particles were prepared by homogeneous precipitation. Powders were characterized with respect to size, shape, crystal structure, and thermal decomposition behavior. Yttria precursor particles were spherical, monosized (0.4 μm), and amorphous; whereas lanthana, neodymia, and ceria precursors were prismatic (ranging from 1 to 6 μm in size) and crystalline. Crystal structure was found

M. Akinc; D. Sordelet

1987-01-01

359

Synthesis of polyethercarbonate from carbon dioxide and cyclohexene oxide by yttrium–metal coordination catalyst  

Microsoft Academic Search

The copolymerization of carbon dioxide and cyclohexene oxide to generate polyethercarbonate using yttrium–metal coordination catalyst was carried out in this study. After testing several catalyst systems, it was found that the system consisting of Y(CF3CO2)3(I), Zn(Et)2(II),and glycerine(III) in the solvent of 1,3-dioxolane was the most effective catalyst. The IR and 1H NMR spectra indicated that the resulting copolymer was indeed

Tsung-Ju Hsu; Chung-Sung Tan

2001-01-01

360

Optical characterization of spherical fine particles of glassy Eu 3+ doped yttrium basic carbonates  

Microsoft Academic Search

Spherical fine particles of glassy Eu3+ doped yttrium basic carbonate, whose sizes are about 300 nm in diameter, are prepared by a co-precipitation method using urea as a precipitation generator. The optical properties concerned with the f–f transitions of Eu3+ are investigated for the as-prepared powder and the powder samples calcined at 300 and 550 °C. As the calcination temperature

Masanori Tanaka; Yoshihiro Nishisu; Mikio Kobayashi; Atusi Kurita; Hiromasa Hanzawa; Yasuo Kanematsu

2003-01-01

361

Transformation of carbon monoxide dimer surface structures on yttrium oxide modified by silver  

Microsoft Academic Search

1.It has been established that introducing Ions of silver(II) in yttrium (III) oxide leads to the formation of a significant concentration of a paramagnetic dimer species (CO)2- in the course of the adsorption of carbon monoxide, and that these dimers exhibit high thermal stability and reactivity.2.Kinetic dependences have been obtained for the transformation of the paramagnetic species O2-, CO2-, (CO)2-,

S. N. Vydrin; A. V. Bobolev; A. Yu. Loginov

1987-01-01

362

Carbon doped yttrium aluminum garnet (YAG:C)—A new phosphor for radiation dosimetry  

Microsoft Academic Search

Carbon doped yttrium aluminum garnet (YAG:C) samples were prepared by a simple process involving melting of polycrystalline YAG powder in graphite environment using electron gun of a vacuum deposition system meant for deposition of thin films. The samples showed excellent TL and OSL response in the dose range of 10mGy to 100Gy. However, the YAG treated in a similar manner

M. S. Kulkarni; K. P. Muthe; N. S. Rawat; D. R. Mishra; M. B. Kakade; S. Ramanathan; S. K. Gupta; B. C. Bhatt; J. V. Yakhmi; D. N. Sharma

2008-01-01

363

Molecular field theory analysis of magneto-optic sensitivity of gallium-substituted yttrium iron garnets  

Microsoft Academic Search

The temperature dependence of the magneto-optic sensitivity of gallium-substituted yttrium iron garnets was measured at 1.3 ?m and compared with a model based on molecular field theory. The model incorporates results of measurements of both the saturation magnetization and saturation Faraday rotation versus temperature. These measurements were analyzed in the context of molecular field theory to extract the fundamental molecular

Merritt N. Deeter; Silvia Milia´n Bon

1996-01-01

364

Optical and magneto-optical properties of nanostructured yttrium iron garnet  

Microsoft Academic Search

Bulk dense samples of nanostructured yttrium iron garnet Y3Fe5O12 with crystallite sizes of 20–40 nm are prepared by high-pressure torsion from a garnet powder with micron grains. The absorption\\u000a and Faraday rotation spectra in the IR range and the transverse Kerr effect spectra in the visible spectral range for these\\u000a samples are measured. The absorption and magneto-optical effect spectra are

B. A. Gizhevski?; Yu. P. Sukhorukov; E. A. Gan’shina; N. N. Loshkareva; A. V. Telegin; N. I. Lobachevskaya; V. S. Gaviko; V. P. Pilyugin

2009-01-01

365

HRTEM Investigation of Silicon Nitride Powder Coated with Yttrium Oxide-Precursor  

Microsoft Academic Search

Ceramic matrix composites based on silicon nitride (Si3N4) are potential candidates for use as high-temperature structural materials. However, the high melting point and low self-diffusion coefficient of Si3N 4 makes fabrication difficult without the addition of a sintering aid such as yttrium oxide (Y203) or aluminium oxide (AI20 3). Addition of sintering aid through mechanical mixing does not produce homogeneous

I. J. Davies; B. Djuricic; S. Pickering; M. De Hosson

366

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

367

Synthesis of nanocrystalline powders of yttrium aluminum garnet doped by neodymium  

Microsoft Academic Search

Nanocrystalline powders of yttrium aluminum garnet were synthesized by the decomposition of gel formed by citrate metal complexes\\u000a with ethylene glycol (the Pechini method). Using the Pechini method, it was possible to synthesize nanocrystalline garnet\\u000a powders at a lower temperature than using the traditional coprecipitation of hydroxocarbonates. X-ray diffraction data showed\\u000a that the size of coherent scattering of X-ray for

D. V. Mamonova; M. D. Mikhailov; K. G. Sevast’yanova; A. V. Semencha; A. S. Tver’yanovich; A. L. Shakhmin

2011-01-01

368

Reactions of barium-yttrium-copper oxides with aqueous media and their applications in structural characterization  

SciTech Connect

Leach studies carried out on barium-yttrium-copper oxides in water and in 0.05 M KI have shown the selective occurrence of two processes, vic. leaching of barium and loss of excess oxygen, e.g. through oxidation of iodide. The extent of these two processes during the early stages is much larger in the case of open structures, e.g. the tetragonal phase. Accordingly, leaching in aqueous media provides a sensitive and convenient method of structural characterization.

Barkatt, A.; Hojaji, H.; Michael, K.A. (Vitreous State Univ., Washington, DC (USA))

1987-07-01

369

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

370

Spectrofluorimetric determination of nucleic acids as 8-hydroxyquinoline\\/ yttrium ternary complexes  

Microsoft Academic Search

The formation of nucleic acids\\/8-hydroxyquinoline\\/yttrium(III) ternary complexes and their fluorescent properties have been studied. The nucleic acids studied include native and thermally denatured calf thymus DNA, fish sperm DNA and yeast RNA. In the range of pH 7.6–8.5, controlled by NH3-NH4C1 buffer, ternary complexes are formed that fluoresce at different wavelengths with different nucleic acids. Based on the fluorescence reactions,

Cheng Zhi Huang; Ke An Li; Shen Yang Tong

1997-01-01

371

Yttrium and rare earth elements in fluids from various deep-sea hydrothermal systems  

Microsoft Academic Search

Rare earth element (REE) and yttrium (Y) concentrations were measured in fluids collected from deep-sea hydrothermal systems including the Mid-Atlantic Ridge (MAR), i.e., Menez Gwen, Lucky Strike, TAG, and Snakepit; the East Pacific Rise (EPR), i.e., 13°N and 17–19°S; and the Lau (Vai Lili) and Manus (Vienna Woods, PacManus, Desmos) Back-Arc Basins (BAB) in the South-West Pacific. In most fluids,

Eric Douville; Philippe Bienvenu; Jean Luc Charlou; Jean Pierre Donval; Yves Fouquet; Pierre Appriou; Toshitaka Gamo

1999-01-01

372

Neodymium:yttrium-aluminum garnet contact laser ablation of Barrett's high grade dysplasia and early adenocarcinoma  

Microsoft Academic Search

OBJECTIVES:We describe the efficacy and safety of neodymium:yttrium-aluminum garnet (Nd:YAG) contact laser ablation of Barrett's high grade dysplasia (HGD) and\\/or early adenocarcinoma.METHODS:Consecutive Barrett's patients in whom HGD or adenocarcinoma was detected were eligible. Radial array echoendosonography and high frequency catheter probe ultrasonography were performed. Patients were excluded if ultrasound revealed the presence of Barrett's cancer with regional lymph nodes or

Allan P. Weston; Prateek Sharma

2002-01-01

373

Complexes of Yttrium and Lanthanide Bromides with 4-N-(2?-Hydroxybenzylidene) Aminoantipyrine  

Microsoft Academic Search

Ten new complexes of bromides of yttrium and lanthanides with 4-N-(2?-hydroxybenzylidene)amino-antipyrine (HBAAP) having the formula [Ln(HBAAP)2Br2]Br where Ln = Y. La, Pr, Nd, Sm, Eu, Gd, Dy, Ho and Er have been prepared and characterized. Molar conductance studies indicate 1:1 electrolytic behaviour for these complexes. Their infrared spectra show that HBAAP acts as a neutral tridentate ligand coordinating through the

Marykutty Joseph; M. K. M. Nair; P. K. Radhakrishnan

1995-01-01

374

Effect of yttrium on the microstructure of a semi-solid A356 Al alloy  

Microsoft Academic Search

The semi-solid slurry of an A356 Al alloy, which was grain-fined by yttrium, was manufactured by low temperature pouring. The effects of grain-refining on the morphology and the grain size of the primary ? phase in the semi-solid A356 Al alloy were researched. The results indicate that the semi-solid A356 Al alloy with particle-like and rosette-like primary ?-Al can be

Zheng LIU; Yongmei HU

2008-01-01

375

Blue up-conversion emission in Yb and Tm-codoped potassium yttrium tungstate  

Microsoft Academic Search

The spectroscopic characteristics of potassium yttrium tungstate crystal (KYW), codoped with ytterbium and thulium ions, have been investigated from the point of view of up-conversion blue lasing from 1G4 multiplet. An overall 3H6 multiplet splitting of ~530 cm-1 for the trivalent thulium ion in the KYW host was obtained. A decay time of ~112 mus for the 1G4-->3H6 blue luminescence

A. N. Kuzmin; A. V. Kachynski; P. N. Prasad; A. A. Demidovich; L. E. Batay; A. Bednarkiewicz; W. Strek; A. N. Titov

2004-01-01

376

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

377

Influence of yttrium on the high temperature deformability of TiAl alloys  

Microsoft Academic Search

The effects of yttrium additions on plastic deformability and the change of microstructures after deformation of TiAl alloys were investigated by isothermal hot-compression pressing. The experiments were conducted with the Gleeble-1500D style of thermo-force analogue machine. The results indicated that the higher the deformation temperature and the lower the strain rate, the smaller the deformation resistance, and adding 0.3at.%Y can

F. T. Kong; Y. Y. Chen; B. H. Li

2009-01-01

378

Coprecipitation synthesis and sintering of yttrium aluminum garnet (YAG) powders: the effect of precipitant  

Microsoft Academic Search

YAG precursors were co-precipitated from a mixed solution of aluminum and yttrium nitrates using ammonia water and ammonium hydrogen carbonate as precipitants, respectively. Phase evolution of the precursors during calcination and sinterability of the resultant YAG powders were compared between the two methods. The use of ammonia water produced a hydroxide precursor with an approximate composition of Al(OH)3·0.3[Y2(OH)5(NO3)·3H2O] which transformed

Ji-Guang Li; Takayasu Ikegami; Jong-Heun Lee; Toshiyuki Mori; Yoshiyuki Yajima

2000-01-01

379

Transarterial Hepatic Yttrium90 Radioembolization in Patients with Unresectable Intrahepatic Cholangiocarcinoma: Factors Associated with Prolonged Survival  

Microsoft Academic Search

Introduction  In unresectable intrahepatic cholangiocarcinoma (ICC), systemic chemotherapy often is viewed as the only option, although\\u000a efficacy is limited. Radioembolization (RE) using yttrium-90 (90Y) microspheres is an accepted therapy for patients with hepatocellular-carcinoma or metastatic liver tumors. However, there\\u000a are limited data on the value of RE in patients with ICC and few data on factors influencing prognosis. The purpose of

Ralf-T. Hoffmann; Philipp M. Paprottka; Agnes Schön; Fabian Bamberg; Alexander Haug; Eva-Maria Dürr; Barbara Rauch; Christoph T. Trumm; Tobias F. Jakobs; Thomas K. Helmberger; Maximilian F. Reiser; Frank T. Kolligs

380

The effect of yttrium addition on the oxidation resistance of EPM TiAl-based intermetallics  

Microsoft Academic Search

The effect of yttrium on the oxidation resistance of elemental powder metallurgy (EPM) processed TiAl-based alloys was studied. Y-addition improved the oxidation resistance of the experimental alloys exposed at 800 °C for 350 h. The improved oxidation resistance was attributed to a fine-grained (Y, Al)O-type oxides and the segregation of Y in the grain boundaries and at the interfaces of

Y. Wu; S. K. Hwang; S. W. Nam; N. J. Kim

2003-01-01

381

The effect of yttrium and thorium on the oxidation behavior of NiCrAl alloys  

Microsoft Academic Search

The effect of quaternary additions of 0.5% Y and 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 1000–1200°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

Arun Kumar; M. Nasrallah; D. L. Douglass

1974-01-01

382

Intensity coherence of a multimode Nd-doped yttrium aluminum garnet laser  

SciTech Connect

We measure the power spectral densities, at relaxation oscillation frequencies, of the individual longitudinal modes and the total intensity of a Nd-doped yttrium aluminum garnet laser at low pumping rate. We then test relationships between these quantities that are derived from the modal rate equations theory. The theoretical relations for the two mode case are confirmed by the experiment. However, in the three-mode regime, theory and experiments do not agree well.

Hill, T.; Hamilton, M.W.; Pieroux, D.; Mandel, P. [Department of Physics and Mathematical Physics, University of Adelaide, Adelaide SA 5005 (Australia); Optique Nonlineaire Theorique, Universite Libre de Bruxelles, Campus Plaine, Code Postal 231, B-1050 Brussels (Belgium)

2002-12-01

383

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

384

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

385

Molecular beam epitaxy growth of neodymium-doped yttrium aluminum perovskite  

Microsoft Academic Search

Epitaxial neodymium-doped yttrium aluminum perovskite (Nd:YAlO3) has been grown by plasma-assisted molecular beam epitaxy on R-plane sapphire at 985?C. The substrates were annealed in air at 1150?C to generate atomically ordered surfaces. Structural and optical characterization was performed using X-ray diffraction and photoluminescence. Emission spectra identical to that from bulk crystalline Nd:YAlO3 were obtained.

R. Kumaran; S. E. Webster; S. Penson; Wei Li; T. Tiedje

2009-01-01

386

Magnetically-Tunable Microwave Filters Using Single-Crystal Yttrium-Iron-Garnet Resonators  

Microsoft Academic Search

A new type of magnetically-tunable band-pass microwave filter that makes use of ferromagnetic resonance in single-crystal yttrium iron garnet is presented. The 3-db bandwidth can be adjusted from about 6 Mc to 100 Mc at X-band, and the center frequency can be tuned over a wide range of frequencies, by means of a varying dc field. A theoretical analysis of

1961-01-01

387

Growth and hydrogenation of epitaxial yttrium switchable mirrors on CaF 2  

Microsoft Academic Search

Rutherford backscattering (RBS) ion channeling measurements and X-ray diffraction experiments are performed to study the epitaxial nature of as-deposited yttrium on CaF2?111? substrates and the effect of hydrogenation on the crystalline quality. The RBS and X-ray results clearly demonstrate the unique epitaxial relation between as-deposited films and the substrate, which is preserved upon loading with hydrogen. X-Ray diffraction reveals: (i)

E. S. Kooij; J. H. Rector; D. G. Nagengast; J. W. J. Kerssemakers; B. Dam; R. Griessen; A. Remhof; H. Zabel

2002-01-01

388

Three-dimensional microstructuring of yttrium aluminum garnet crystals for laser active optofluidic applications  

NASA Astrophysics Data System (ADS)

We demonstrate three-dimensional microstructuring in a neodymium doped yttrium aluminum garnet (Nd:YAG) crystal. Spatially well-defined hollow microstructures deeply embedded within the material are shown to result from the creation of a pre-damage state within the Nd:YAG crystal network that is validated using luminescence and Raman analyses of the structures. This opens up the potential of fabricating next-generation optofluidic devices in optical gain materials.

Choudhury, D.; Rodenas, A.; Paterson, L.; Díaz, F.; Jaque, D.; Kar, A. K.

2013-07-01

389

Optimum regime of passive mode locking in the yttrium aluminate laser  

Microsoft Academic Search

In order to obtain pulses of maximum energy and minimum time, the passive mode-locking regime was optimized for the yttrium aluminate-neodymium laser on the basis of a range of polymethine dyes with different nonlinear parameters (bleaching intensity and relaxation time). Ultrashort pulses with a minimum time of 5 ps and power ~ 0.4 GW were generated. The radiant strength of

M. I. Demchuk; V. P. Mikhailov

1985-01-01

390

Observation of second-order quadrupole shift in Mössbauer spectrum of amorphous YIG (yttrium iron garnet)  

Microsoft Academic Search

A previously unsuspected quadrupole shift of the nuclear Zeeman lines in amorphous magnets has been observed by 57Fe Mössbauer spectroscopy in speromagnetic amorphous yttrium iron garnet at 4.2 K. The distinctive shift pattern is shown to arise theoretically as a second-order perturbation of the Zeeman levels by the distribution of electric field gradients in the amorphous state. It is observed

M. Eibschütz; M. E. Lines

1982-01-01

391

Preparation of yttrium–iron-garnet nanocrystals dispersed in nanosize-pore glass  

Microsoft Academic Search

Amorphous yttrium–iron-garnet (YIG) nanoparticles were dispersed in kerosene solvent and these colloids were introduced into the nanosize pores of controlled pore glass (CPG). After heat treatment, a YIG nanocrystal-dispersed glass was obtained and observed by electron microscopy. The compounds prepared with different pore size CPG under different heat treatment conditions were identified by X-ray diffraction. For samples with a 292-nm-pore-size

Susamu Taketomi; Christopher M Sorensen; Kenneth J Klabunde

2000-01-01

392

Decay properties of microwave-magnetic-envelope solitons in yttrium iron garnet films  

Microsoft Academic Search

Microwave magnetic envelope (MME) wave-packet propagation in a 7.2-μm-thick yttrium iron garnet film has been investigated to determine the decay properties of linear and nonlinear MME pulses. The data were obtained in the magnetostatic backward volume wave configuration with an in-plane static field of 1088 Oe and an operating frequency of 5 GHz. Output pulse profiles, peak powers, and integrated

Hua Xia; Pavel Kabos; Carl E. Patton; Harold E. Ensle

1997-01-01

393

Thick yttrium-iron-garnet (YIG) films produced by pulsed laser deposition (PLD) for integration applications  

Microsoft Academic Search

High magnetic and dielectric quality, thick (50-100 ?m), epitaxial, yttrium-iron-garnet (YIG) films were deposited at high rate by PLD. A two-step (low temperature deposition followed by rapid thermal anneal) low thermal budget PLD process was demonstrated suitable to deposit thick polycrystalline YIG films on metallized Si and GaAs. A modified PLD apparatus is used to deposit uniform, 80-100 ?m, thick

H. Buhay; J. D. Adam; M. R. Daniel; N. J. Doyle; M. C. Driver; G. W. Eldridge; M. H. Hanes; R. L. Messham; M. M. Sopira

1995-01-01

394

Observation of period doubling and chaos in spin-wave instabilities in yttrium iron garnet  

Microsoft Academic Search

Ferromagnetic resonance in a polished 0.047-cm-radius sphere of gallium-doped yttrium iron garnet is studied at 1.3 GHz in a magnetic field of 460 G. A second-order Suhl instability is observed, owing to the nonlinear coupling of the precessing uniform magnetization with spin waves. This is detected by the onset of auto-oscillations of the magnetization. One of these modes with frequency

George Gibson; Carson Jeffries

1984-01-01

395

Sputter Deposition of Cerium Yttrium Iron Garnet Films on Substrates with Ion-Beam Bombarded Patterns  

Microsoft Academic Search

We report the experimental results of magnetooptic rare-earth iron-garnet sputtered film deposition on substrates with a modified surface. The magnetooptic garnet considered here is cerium-substituted yttrium iron garnet which is one of the promising materials for nonreciprocal optical devices and magnetooptic recording media. The surface of the substrate, gadolinium gallium garnet, is etched by ion-beam bombardment, whose energy was controllable

Yasuyuki Okamura; Sadahiko Yamamoto

1999-01-01

396

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

397

Enhanced microwave magnetic properties in nonstoichiometric yttrium iron garnets for high power applications  

Microsoft Academic Search

A nonstoichiometric 3 mol% Fe-deficient yttrium iron garnet composition (Y3Fe4.85O12) chemically-modified with Si and Mn was investigated with regard to microstructure characteristics and microwave magnetic properties for high power applications. The two additives, Si and Mn were added to the garnet composition by a chemical method utilizing a sol-gel reaction. The samples were sintered at 1500°C for 3 hrs in

Yong S. Cho; Vernon L. Burdick; R. W. Amarksoon

1998-01-01

398

Magneto-optical properties of yttrium iron garnet (YIG) thin films elaborated by radio frequency sputtering  

Microsoft Academic Search

Thin films of yttrium iron garnet (YIG) are grown by radio frequency magnetron non reactive sputtering system. Thin films are crystallised by heat-treatment to obtain magneto-optical properties. On quartz substrate, the network of cracks observed on the annealed samples can be explained by the difference between the thermal expansion coefficient of substrate and YIG. Physico-chemical analysis shown that the obtained

T. Boudiar; B. Payet-Gervy; M.-F. Blanc-Mignon; J.-J. Rousseau; M. Le Berre; H. Joisten

2004-01-01

399

Formation, propagation, reflection, and collision of microwave envelope solitons in yttrium iron garnet films  

Microsoft Academic Search

The end edge reflection and collision of backward volume wave bright microwave magnetic envelope solitons in long and narrow yttrium iron garnet single-crystal films has been studied experimentally. The experiments were done on 5.1-μm-thick, 1-mm-wide films. The bright solitons were excited by single or double 8â36-ns-wide microwave pulses with a nominal carrier frequency of 5.8 GHz. The experiments utilized a

N. G. Kovshikov; B. A. Kalinikos; C. E. Patton; E. S. Wright; J. M. Nash

1996-01-01

400

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

401

Magnetic and electrical properties of aluminium and chromium co-substituted yttrium iron garnets  

Microsoft Academic Search

Polycrystalline yttrium aluminium-chromium iron garnets (Y3AlxCrxFe5 ? 2xO12) with varying Al-Cr substitution (0 ? x ? 1.0) have been prepared in the pellet form, and studied by X-ray diffraction, magnetization, a.c. susceptibility and electrical resistivity measurements. The lattice constants are determined and the applicability of Vegard's law has been tested. The saturation magnetization (4? Ms) decreases linearly with increasing x

V. D. Murumkar; K. B. Modi; K. M. Jadhav; G. K. Bichile; R. G. Kulkarni

1997-01-01

402

Effect of Bi-substitution on the dielectric properties of polycrystalline yttrium iron garnet  

Microsoft Academic Search

The effect of Bi-substitution on the dielectric properties of yttrium iron garnet (YIG) was studied in this paper. The Bi-substituted YIG (YIG:Bi) polycrystalline samples, having composition of Y3?xBixFe5O12, were prepared by the solid-state reaction method. x varied from 0 to 1.2. The phase formation and microstructure were performed by X-ray diffraction and scanning electron microscopy, respectively. Ions valency was identified

Hongjie Zhao; Ji Zhou; Yang Bai; Zhilun Gui; Longtu Li

2004-01-01

403

Spinwave instabilities, auto-oscillations, and chaos in yttrium-iron-garnet  

Microsoft Academic Search

A review is presented of recent experimental results in yttrium-iron-garnet subject to three different spin-wave pumping mechanisms: parallel pumping, subsidiary resonance (first-order Suhl process), and premature saturation of the main resonance (second-order Suhl process). A theoretical model derived from first principles and leading to coupled nonlinear spin-wave equations, is used to interpret the observed spin-wave instabilities, auto-oscillations, and chaotic dynamics.

SERGIO M. REZENDE; FLAVIO M. DE AGUIAR

1990-01-01

404

Observation of linewidth asymmetry in the Mössbauer Zeeman spectrum of amorphous yttrium iron garnet  

Microsoft Academic Search

A measurement of the six-line Mössbauer Zeeman spectrum of 57Fe in amorphous yttrium iron garnet at 4.2 K reveals a linewidth asymmetry involving the three line pairs Li and L7-i, i=1, 2, 3. The major source of this asymmetry is found to be a positive correlation between isomer shift and hyperfine field with a degree of linearity of 18%. A

M. Eibschütz; M. E. Lines

1982-01-01

405

Wideband magneto-optic modulation in a bismuth-substituted yttrium iron garnet waveguide  

Microsoft Academic Search

We present a tunable wideband bismuth-substituted yttrium iron garnet (Bi-YIG) waveguide magneto-optic (MO) modulator. High-speed current transients are used to switch the in-plane magnetization of the film, which modulates an 800 nm optical beam. Large bandwidth optical modulation is achieved by driving the device in a non-resonant mode that is well below the ferromagnetic resonance frequency of the film. The

S. E Irvine; A. Y Elezzabi

2003-01-01

406

Magnetostatic Wave Propagation in Yttrium-Iron-Garnet With Microfabricated Surfaces  

Microsoft Academic Search

Various periodic gratings were carved on the surface of yttrium-iron-garnet (YIG) single-crystal films by a high-precision dicing saw. The mechanical process achieved the clearer structural modification in comparison with the wet and dry processes used in the past studies. Two types of magnetostaic wave filters were prepared utilizing the YIG gratings. In a band-stop filter, the rejection notch reached 40

Atsushi Maeda; Masami Susaki

2006-01-01

407

A monolithic single-crystal yttrium iron garnet\\/silicon X-band circulator  

Microsoft Academic Search

Production of truly monolithic microwave integrated circuits that incorporate ferrite passive control elements has been hindered by the material property mismatches between ferrites and semiconductors. In this work, monolithic Y-junction circulators were fabricated by bonding 100-?m-thick single-crystal yttrium iron garnet films to silicon at 195°C, and then removing the gadolinium gallium garnet substrate. S-parameter measurements on the circulator and matching

S. A. Oliver; P. M. Zavracky; N. E. McGruer; R. Schmidt

1997-01-01

408

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

409

Catalytic asymmetric epoxidation of alpha,beta-unsaturated esters with chiral yttrium-biaryldiol complexes.  

PubMed

The full details of the asymmetric epoxidation of alpha,beta-unsaturated esters catalyzed by yttrium complexes with biaryldiol ligands are described. An yttrium-biphenyldiol catalyst, generated from Y(OiPr)3-biphenyldiol ligand-triphenylarsine oxide (1:1:1), is suitable for the epoxidation of various alpha,beta-unsaturated esters. With this catalyst, beta-aryl alpha,beta-unsaturated esters gave high enantioselectivities and good yields (< or = 99% ee). The reactivity of this catalyst is good, and the catalyst loading could be decreased to as little as 0.5-2 mol % (the turnover number was up to 116), while high enantiomeric excesses were maintained. For beta-alkyl alpha,beta-unsaturated esters, an yttrium-binol catalyst, generated from Y(OiPr)3-binol ligand-triphenylphosphine oxide (1:1:2), gave the best enantioselectivities (< or = 97% ee). The utility of the epoxidation reaction was demonstrated in an efficient synthesis of (-)-ragaglitazar, a potential antidiabetes agent. PMID:17441160

Kakei, Hiroyuki; Tsuji, Riichiro; Ohshima, Takashi; Morimoto, Hiroyuki; Matsunaga, Shigeki; Shibasaki, Masakatsu

2007-02-01

410

Effect of yttrium additions on void swelling in Liquid Metal Fast Breeder Reactor candidate cladding alloys  

SciTech Connect

Candidate Liquid Metal Fast Breeder Reactor cladding alloys AL1 (Fe-26% Ni-9% Cr) and AL2 (Fe-35% Ni-12% Cr) without and with the addition of 0.1% yttrium were bombarded by 4 MeV/sup 56/Fe/sup 2 +/ ions without and with simultaneous bombardment by 0.4 MeV /sup 4/He/sup +/ ions. These bombardments were conducted at various irradiation temperatures to determine the effect of yttrium on void swelling. The addition of yttrium decreased peak swelling for 4 MeV /sup 56/Fe/sup 2 +/ ion bombarded AL1 and AL2 by 28% and 20%, respectively. In all cases where similar sample comparisons were made (i.e., undoped with undoped and doped with doped) and where bombardment conditions were similar (i.e., single with single beam and dual with dual beam), AL1 showed less peak swelling than did AL2. Simultaneously implanting helium during heavy-ion bombardment increased peak swelling in undoped and doped AL1 by factors of 2.3 and 2.6, respectively.

Hopson, R.D.

1981-10-01

411

Novel syntergistic agent for selective separation of yttrium from other rare earth metals  

SciTech Connect

An oil-soluble synergistic agent has been developed for the selective separation of yttrium (Y) from the other rare earth metals. The synergistic agent is a polyaminocarboxylic acid alkylderivative and has interfacial activity like that of surfactants. Separation of yttrium from heavy rare earth metals (erbium (Er) and holmium (Ho)) in the presence of the synergistic agent was carried out with a 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester as a carrier using a hollow-fiber membrane extractor. The new agent shows a synergistic effect on the permeation rate of rare earth metals at the oil-water interface. By the addition of a small amount of the agent, the selectivity for yttrium from the two rare earth metals was enhanced remarkably, because of the permeation rate of Y was selectively decreased compared with those of Er and Ho. The synergistic effect is discussed from the viewpoint of the stability constant for rare earth metals and the interfacial activity of the synergistic agent. The difference in interaction between the synergistic agent and rare earth ions at the oil-water interface results in an increase in the separation efficiency.

Miyata, Terufumi; Goto, Masahiro; Nakashio, Fumiyuki [Kyushu Univ., Fukuoka (Japan)

1995-06-01

412

[The set-up of an in vitro model for stable knockdown of MyD88 by lentivirus-based RNAi in IEC-6 cell line and the study on its early apoptosis].  

PubMed

Intestinal inflammatory disease is a kind of non-specific disease with morbidity increasing yearly. It has been proved that the Toll like receptor 4 (TLR4) signaling pathways are closely related to intestinal inflammatory diseases. Myeloid differentiation protein 88 (Myd88) is a critical adaptor protein of TLR4 signaling and critical for the study of intestinal inflammatory disease, but stable Myd88 knockdown in vitro models of cell line are still very few. In the present study, an HIV-1-based lentivirus three-plamid packaging system was used for the construction of a lentivirual vector mediating RNA interference (RNAi) against Myd88 in intestinal fossae epithelial cell line-6 (IEC-6). Real-time PCR and Western blot were used to detect Myd88 expression. Annexin V staining and flowcytometry (FLM) were applied to detect and evaluate the early apoptosis. The results showed that lentiviral vectors containing the shRNA expression cassette specifically targeting Myd88 were constructed and efficiently stably knocked down Myd88 expression in IEC-6 cell line. Early apoptosis was significantly decreased after Myd88 knockdown. This study successfully constructed a lentivirus-based RNAi for Myd88 and detailed the key technique combined with characteristics of the early apoptosis after the Myd88 knockdown, provided a novel, stable and repeatable in vitro model for the pathogenesis, targeting therapeutic study for the intestinal inflammatory diseases. PMID:23469545

Bao, Pingqian; Li, Yang; Chen, Keling; Zhou, Bin; Liu, Bin; Li, Yuan; Zhou, Zongguang

2012-12-01

413

88. VIEW OF OXIDIZER APRON ON EAST SIDE OF LSB ...  

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

88. VIEW OF OXIDIZER APRON ON EAST SIDE OF LSB (BLDG. 751). LIQUID OXYGEN TOPPING TANK ON RIGHT; GASEOUS NITROGEN IN CENTER; LIQUID OXYGEN RAPID-LOAD TANK ON LEFT. SKID 9 ON RIGHT; SKID 7 IN CENTER; SKID 9A ON LEFT. FEATURES LEFT TO RIGHT IN BACKGROUND: LAUNCH DECK, UMBILICAL MAST, MST, AND NORTH CAMERA TOWER. - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

414

Surface Observed Global Land Precipitation Variations during 1900–88  

Microsoft Academic Search

The authors have analyzed global station data and created a gridded dataset of monthly precipitation for the period of 1900-88. Statistical analyses suggest that discontinuities associated with instrumental errors are large for many high-latitude station records, although they are unlikely to be significant for the majority of the stations. The first leading EOF in global precipitation fields is an ENSO-related

Aiguo Dai; Inez Y. Fung; Anthony D. Del Genio

1997-01-01

415

An 88-kilodalton antigen secreted by Aspergillus fumigatus.  

PubMed Central

An 88-kDa component secreted in vitro by Aspergillus fumigatus has been purified by sequential chromatographic procedures. The molecule is a glycoprotein with an N-linked sugar moiety composed of mannose glucose, and galactose (16:10:1). It is recognized by antibodies from patients with aspergilloma and has potential for the immunodiagnosis of aspergilloma. The antigenicity is associated with the polypeptide part of the molecule (79 kDa). Images

Kobayashi, H; Debeaupuis, J P; Bouchara, J P; Latge, J P

1993-01-01

416

Population Files for use with CAP88 at Los Alamos  

SciTech Connect

CAP88 (Clean Air Act Assessment Package 1988) is a computer model developed for the US Environmental Protection Agency to assess the potential dose from radionuclide emissions to air and to demonstrate compliance with the Clean Air Act. It has options to calculate either individual doses, in units of mrem, or a collective dose, also called population dose, in units of person-rem. To calculate the collective dose, CAP88 uses a population file such as LANL.pop, that lists the number of people in each sector (N, NNE, NE, etc.) as a function of distance (1 to 2 km, etc.) out to a maximum radius of 80 km. Early population files are described in the Los Alamos National Laboratory (LANL) Environmental Reports for 1985 (page 14) and subsequent years. LA-13469-MS describes a population file based on the 1990 census. These files have been updated several times, most recently in 2006 for CAP88 version 3. The 2006 version used the US census for 2000. The present paper describes the 2012 updates, using the 2010 census.

McNaughton, Michael W [Los Alamos National Laboratory; Brock, Burgandy R [Los Alamos National Laboratory

2012-07-10

417

The crucial role of the MyD88 adaptor protein in the inflammatory response induced by Bothrops atrox venom.  

PubMed

Most snake accidents in North Brazil are attributed to Bothrops atrox, a snake species of the Viperidae family whose venom simultaneously induces local and systemic effects in the victims. The former are clinically more important than the latter, as they cause severe tissue lesions associated with strong inflammatory responses. Although several studies have shown that inflammatory mediators are produced in response to B. atrox venom (BaV), there is little information concerning the molecular pathways involved in innate immune system signaling. Myeloid differentiation factor 88 (MyD88) is an adaptor molecule responsible for transmitting intracellular signals from most toll-like receptors (TLRs) after they interact with pathogen-associated molecular patterns (PAMPs) or other stimuli such as endogenous damage-associated molecular patterns (DAMPs). The MyD88-dependent pathway leads to activation of transcription factors, which in turn induce synthesis of inflammatory mediators such as eicosanoids, cytokines and chemokines. The aim of this study was to investigate the involvement of MyD88 on the acute inflammatory response induced by BaV. Wild-type (WT) C57BL/6 mice and MyD88 knockout (MyD88(-/-)) mice were intraperitoneally injected with BaV. Compared to WT mice, MyD88(-/-) animals showed an impaired inflammatory response to BaV, with lower influx of polymorphonuclear and mononuclear cells to the peritoneal cavity. Furthermore, peritoneal leukocytes from BaV-injected MyD88(-/-) mice did not induce COX-2 or LTB4 protein expression and released low concentrations of PGE2. These mice also failed to produce Th1 and Th17 cytokines and CCL-2, but IL-10 levels were similar to those of BaV-injected WT mice. Our results indicate that MyD88 signaling is required for activation of the inflammatory response elicited by BaV, raising the possibility of developing new therapeutic targets to treat Bothrops sp. poisoning. PMID:23474268

Moreira, Vanessa; Teixeira, Catarina; Borges da Silva, Henrique; D'Império Lima, Maria Regina; Dos-Santos, Maria Cristina

2013-03-05

418

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

419

Synthesis of Yttrium BARIUM(2) COPPER(3) Oxygen (7-X) Superconducting Thin Films by Metalorganic Chemical Vapor Deposition  

NASA Astrophysics Data System (ADS)

Yttrium barium cuprate (YBCO) superconducting thin films have been synthesized by metalorganic chemical vapor deposition (MOCVD) on various substrates. The depositions were conducted in a vertical, high-speed rotating (0-2000 rpm) disk reactor which was designed and assembled by this purpose. The 2,2,6,6-tetramethyl-3,5-heptanedione metal chelates of Y, Ba, and Cu were used as precursors, which were transported by nitrogen carrier gas. Oxygen gas was introduced uniformly through the top of the reactor. The films were grown by three different processes. First, YBCO layers were deposited at 500^circ C on (100) YSZ and (100) SrTiO_3 . Post-deposition annealing treatments were performed in order to convert the materials to the superconducting phase. The observed morphologies and the superconducting transition temperatures depended on the annealing process. Films annealed at 980^circC for 18 min exhibited a smooth morphology and metallic characteristics, and had a very sharp transition width (<=q 2K), with onset and zero resistance values of 90 and 88K, respectively. Second, in situ growth of YBCO thin films was performed at a temperature of 800 ^circC. After deposition, the films were cooled down at a rate of 5^circ C/min under 1 atm of oxygen. X-ray diffraction data showed the films to be highly oriented with the c -axis perpendicular to the plane of the substrate. Four -point resistance measurement yielded T_ {c}(R=O) at 91.8K (Delta T_{c} = 2.2K) and 85K (DeltaT_ {c} = 7K) on (100) YSZ and (100) MgO substrates, respectively. Finally, dense YBCO thin films with mirror-like surfaces and well-developed c-axis textures were prepared in situ at a substrate temperature as low as 570^circC by plasma -enhanced MOCVD (PE-MOCVD). Nitrous oxide was remotely activated by a microwave discharge, and transported to the surface of the growing film as atomic oxygen. The films deposited on (100) SrTiO_3 and (100) YSZ attained zero resistance at 72K without further processing. The results of this study indicate that low -temperature in situ fabrication of high-quality high-T _{c} superconducting oxide films by PE-MOCVD is a very attractive thin-film deposition process for the technology of superconducting devices.

Noh, Daniel Dong-Wook

420

Sinomenine Decreases MyD88 Expression and Improves Inflammation-Induced Joint Damage Progression and Symptoms in Rat Adjuvant-Induced Arthritis.  

PubMed

Sinomenine (SIN) is the active principle of the Chinese medical plant Sinomenium acutum which is widely used for the treatment of rheumatoid arthritis (RA) in China. Recently, several groups indicated that myeloid differentiation primary response protein 88 (MyD88) might be associated with disease progression of RA. Here, we observed the effect of SIN on MyD88 expression and showed its therapeutic role in RA. First, immunohistochemical staining in clinical specimens showed that MyD88 was mainly located in characteristic pathological structures of RA synovial tissues. Second, we found that MyD88 was overexpressed in the synovial tissues of the rats with adjuvant-induced arthritis (AIA). Treatment with SIN markedly decreased the expression of MyD88 in AIA rats. Finally, we provided evidences that SIN suppressed inflammation response and inflammation-induced joint destructive progression and arthritis symptoms in AIA rats. Therefore, SIN is an effective therapeutic agent for RA. Targeting MyD88 signaling may provide new methods for the treatment of RA. PMID:23605561

Mu, Hui; Yao, Ru-Bing; Zhao, Ling-Jie; Shen, Si-Yu; Zhao, Zhi-Ming; Cai, Hui

2013-10-01

421

Synthesis and in-depth analysis of highly ordered yttrium doped hydroxyapatite nanorods prepared by hydrothermal method and its mechanical analysis  

Microsoft Academic Search

In this study, undoped and yttrium (Y) doped nanocrystalline hydroxyapatite crystals were synthesized by the hydrothermal method at 180°C for 24h. Highly ordered and oriented hydroxyapatite (HAp) nanorods were prepared by yttrium doping and their nanostructure and physical properties were compared with those of undoped HAp rods. FESEM images showed that the doping with Y ions reduced the diameter (from

A. Joseph Nathanael; D. Mangalaraj; S. I. Hong; Y. Masuda

2011-01-01

422

Dendritic-cell function in Toll-like receptor- and MyD88-knockout mice  

Microsoft Academic Search

Based on recent findings in myeloid differentiation factor 88 (MyD88)- and Toll-like receptor (TLR)-knockout mice, Tsuneyasu Kaisho and Shizuo Akira discuss the roles of TLRs and MyD88 in dendritic cell (DC) maturation and cytokine production. Lipopolysaccharide binds TLR4 and can induce DC maturation in the absence of MyD88, whereas CpG DNA binds TLR9 and induces DC maturation in a MyD88-dependent

Tsuneyasu Kaisho; Shizuo Akira

2001-01-01

423

Estimates of the British Jewish population 1984-88.  

PubMed

"During the 20th century, estimates of the British Jewish population have been obtained by applying appropriate death-rates to communal mortality data. This death-rate method has become increasingly sophisticated with respect to the death-rates used. The exercise reported here covers more than 22,000 deaths recorded in the community over the 5-year period [1984-88].... An estimate of 308,000 is suggested for the community, in which deaths-related data are augmented by information about births within the community." PMID:12320136

Haberman, S; Schmool, M

1995-01-01

424

Successful treatment of laser induced hypopigmentation with narrowband ultraviolet B targeted phototherapy.  

PubMed

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

2013-04-01

425

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.

Mysore, Venkataram; Anitha, B; Hosthota, Abhineetha

2013-01-01

426

Improved performance rhenium containing single crystal alloy turbine blades utilizing ppm levels of the highly reactive elements lanthanum and yttrium  

SciTech Connect

Turbine inlet temperatures have now approached 1650 C at maximum power for the latest large commercial turbofan engines, resulting in high fuel efficiency and thrust levels approaching or exceeding 445 kN (100,000 lbs.). High reliability and durability must be intrinsically designed into these turbine engines to meet operating economic targets and ETOPS certification requirements. Re additions to cast airfoil superalloys not only improve creep and thermomechanical fatigue strength but also environmental properties, including coating performance. It is now known that sulfur (S) at levels <10 ppm but >0.2 ppm in these alloys reduces the adherence of {alpha} alumina protective scales on these materials or their coatings by weakening the Van der Waal`s bond between the scale and the alloy substrate. A team approach has been used to develop an improvement to CMSX-4 alloy which contains 3% Re, by reducing S and phosphorus (P) levels in the alloy to <2 ppm, combined with residual additions of lanthanum (La) + yttrium (Y) in the range 10--30 ppm. Results from cyclic, burner rig dynamic oxidation testing at 1093 C show thirteen times the number of cycles to initial alumina scale spallation for CMSX-4 [La + Y] compared to standard CMSX-4. The La assists with ppm chemistry control of the Y throughout the single crystal turbine blade castings through the formation of a continuous lanthanum oxide film between the molten and solidifying alloy and the ceramic core and prime coat of the shell mold. Y and La tie up the M2 ppm but >0.2 ppm residual S in the alloy as very stable Y and La sulfides and oxysulfides, thus preventing diffusion of the S atoms to the alumina scale layer under high temperature, cyclic oxidizing conditions. La also forms a stable phosphide. CMSX-4 (ULS) (La + Y) HP shroudless turbine blades will commence engine testing in May 1998.

Ford, D.A.; Fullagar, K.P.L.; Bhangu, H.K. [Rolls-Royce PLC, Bristol (United Kingdom); Thomas, M.C.; Burkholder, P.S.; Korinko, P.S. [Allison Engine Co., Indianapolis, IN (United States); Harris, K.; Wahl, J.B. [Cannon-Muskegon Corp., MI (United States)

1999-01-01

427

First report on a prospective trial with yttrium-90-labeled ibritumomab tiuxetan (Zevalin) in primary CNS lymphoma.  

PubMed

Most patients with primary CNS lymphoma (PCNSL) relapse after primary therapy. Standard salvage treatment has not yet been established in PCNSL. Anti-CD20 immunotherapy has expanded treatment options in systemic B-cell lymphoma; however, its use is limited by reconstitution of the blood-brain barrier after tumor shrinkage. The aim of this phase II trial was to evaluate the therapeutic efficacy, toxicity, and biodistribution of yttrium-90 ((90)Y) ibritumomab tiuxetan in PCNSL. Ten patients with relapsed PCNSL were included in a phase II trial and treated with the (90)Y-labeled anti-CD20 antibody ibritumomab tiuxetan. Nine patients actually received the planned radioimmunotherapy. In six patients, biodistribution of the antibody was measured by indium-111 ((111)In) ibritumomab tiuxetan whole-body scans and single-photon-emission CT (SPECT) of the brain. All patients were evaluated for toxicity and response at least 4 weeks after therapy. Four patients responded: one patient had a complete response lasting 30+ months, and three patients had short-lived responses of Target accumulation of the antibody was demonstrated in four of the six patients examined by SPECT imaging with (111)In ibritumomab tiuxetan. All patients experienced grade 3/4 hematotoxicity but no acute neurotoxicity. Penetration of a therapeutic antibody into PCNSL and significant clinical activity was shown. Because of limited response duration and considerable hematotoxicity, future investigations should focus on a multimodal approach with additional chemotherapy and preferably autologous stem cell support. PMID:19060176

Maza, Sofiane; Kiewe, Philipp; Munz, Dieter L; Korfel, Agnieszka; Hamm, Bernd; Jahnke, Kristoph; Thiel, Eckhard

2008-12-05

428

Mycobacterium indicus pranii mediates macrophage activation through TLR2 and NOD2 in a MyD88 dependent manner.  

PubMed

Mycobacterium indicus pranii (MIP) is a non-pathogenic strain of mycobacterium and has been used as a vaccine against tuberculosis and leprosy. Here, we investigated the role of different pattern recognition receptors in the recognition of heat-killed MIP by macrophages. Treatment of macrophages with MIP caused upregulation of pro-inflammatory cytokines (like TNF? and IL-1?) which was mediated through both TLR2 and NOD2, as revealed by our knockdown and/or knockout studies. Mechanistically, MIP-induced macrophage activation was shown to result in NF-?B activation and drastically abrogated by MyD88 deficiency, suggesting its regulation via an MyD88-dependent, NF-?B pathway. Interestingly, the IFN-inducible cytokine, CXCL10, which is known target of the TRIF-dependent TLR pathway was found to be upregulated in response to MIP but, in an MyD88-dependent manner. Collectively, these results demonstrate macrophages to recognize and respond to MIP through a TLR2, NOD2 and an MyD88-dependent pathway. However, further studies should clarify whether additional TLR-dependent or -independent pathways also exist in regulating the full spectrum of MIP action on macrophage activation. PMID:22796586

Pandey, Rajeev Kumar; Sodhi, Ajit; Biswas, Subhra K; Dahiya, Yogesh; Dhillon, Manprit K

2012-07-13

429

Lawrence's Legacy : Seaborg's Cyclotron - The 88-Inch Cyclotron turns 40  

NASA Astrophysics Data System (ADS)

In 1958, Sputnik had recently been launched by the Russians, leading to worry in Congress and increased funding for science and technology. Ernest Lawrence was director of the "Rad Lab" at Berkeley. Another Nobel Prize winner, Glenn Seaborg, was Associate Laboratory Director and Director of the Nuclear Chemistry Division. In this atmosphere, Lawrence was phoned by commissioners of the Atomic Energy Commission and asked what they could do for Seaborg, "because he did such a fine job of setting up the chemistry for extracting plutonium from spent reactor fuel" [1]. In this informal way, the 90-Inch (eventually 88-Inch) Cyclotron became a line item in the federal budget at a cost of 3M (later increased to 5M). The 88-Inch Cyclotron achieved first internal beam on Dec. 12, 1961 and first external beam in May 1962. Forty years later it is still going strong. Pieced together from interviews with the retirees who built it, Rad Lab reports and archives from the Seaborg and Lawrence collections, the story of its design and construction - on-time and under-budget - provides a glimpse into the early days of big science. [1] remarks made by Elmer Kelly, "Physicist-in-charge' of the project on the occasion of the 40th anniversary celebration.

McMahan, Margaret; Clark, David

2003-04-01

430

Characterization of anti-HIV activity mediated by R88-APOBEC3G mutant fusion proteins in CD4+ T cells, peripheral blood mononuclear cells, and macrophages.  

PubMed

In this study, we characterized the anti-HIV activities of various R88-APOBEC3G (R88-A3G) mutant fusion proteins in which each A3G mutant was fused with a virus-targeting polypeptide (R14-88, hereafter named R88) derived from HIV-1 Vpr. Our results show that the introduction of the deaminase-defective mutant E259Q into R88-A3G did not affect the virion incorporation of this mutant but blocked the protein's ability to inhibit HIV-1 infection. Our data also reveal that the antiviral effect of A3GY124A, a previously described A3G virus-packaging mutant, was completely rescued when the mutant was fused with R88. In an attempt to identify the most potent R88-A3G fusion proteins against HIV-1 infection, we introduced two Vif-binding mutants (D128K and P129A) into the R88-A3G fusion protein and showed that both R88-A3GD128K and R88-A3GP129A possessed very potent anti-HIV activity. When R88-A3GP129A was transduced into CD4(+) C8166 T cells, HIV-1 infection was completely abolished for at least 24 days. In an attempt to further test the anti-HIV effect of this mutant in primary human HIV susceptible cells, we introduced R88-A3GP129A into human peripheral blood mononuclear cells (PBMCs) and macrophages with a recombinant adeno-associated virus (rAAV2/5) vector. The results demonstrate that a significant inhibition of HIV-1 infection was observed in the transduced PBMCs and macrophages. These results provide evidence for the feasibility of an R88-A3G-based anti-HIV strategy. The further optimization of this system will contribute to the development of new anti-HIV gene therapy approaches. PMID:21182427

Ao, Zhujun; Wang, Xiaoxia; Bello, Alexander; Jayappa, Kallesh Danappa; Yu, Zhe; Fowke, Keith; He, Xinying; Chen, Xi; Li, Junhua; Kobinger, Gary; Yao, Xiaojian

2011-03-18

431

MyD88-Dependent SHIP1 Regulates Proinflammatory Signaling Pathways in Dendritic Cells after Monophosphoryl Lipid A Stimulation of TLR4  

PubMed Central

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.

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

2011-01-01

432

Radiographic response to yttrium-90 radioembolization in anterior versus posterior liver segments.  

PubMed

The purpose of our study was to determine if preferential radiographic tumor response occurs in tumors located in posterior versus anterior liver segments following radioembolization with yttrium-90 glass microspheres. One hundred thirty-seven patients with chemorefractory liver metastases of various primaries were treated with yttrium-90 glass microspheres. Of these, a subset analysis was performed on 89 patients who underwent 101 whole-right-lobe infusions to liver segments V, VI, VII, and VIII. Pre- and posttreatment imaging included either triphasic contrast material-enhanced CT or gadolinium-enhanced MRI. Responses to treatment were compared in anterior versus posterior right lobe lesions using both RECIST and WHO criteria. Statistical comparative studies were conducted in 42 patients with both anterior and posterior segment lesions using the paired-sample t-test. Pearson correlation was used to determine the relationship between pretreatment tumor size and posttreatment tumor response. Median administered activity, delivered radiation dose, and treatment volume were 2.3 GBq, 118.2 Gy, and 1,072 cm(3), respectively. Differences between the pretreatment tumor size of anterior and posterior liver segments were not statistically significant (p = 0.7981). Differences in tumor response between anterior and posterior liver segments were not statistically significant using WHO criteria (p = 0.8557). A statistically significant correlation did not exist between pretreatment tumor size and posttreatment tumor response (r = 0.0554, p = 0.4434). On imaging follow-up using WHO criteria, for anterior and posterior regions of the liver, (1) response rates were 50% (PR = 50%) and 45% (CR = 9%, PR = 36%), and (2) mean changes in tumor size were -41% and -40%. In conclusion, this study did not find evidence of preferential radiographic tumor response in posterior versus anterior liver segments treated with yttrium-90 glass microspheres. PMID:18509704

Ibrahim, Saad M; Lewandowski, Robert J; Ryu, Robert K; Sato, Kent T; Gates, Vanessa L; Mulcahy, Mary F; Kulik, Laura; Larson, Andrew C; Omary, Reed A; Salem, Riad

2008-05-29

433

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

434

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

435

Effect of yttrium additions on the tensile properties and hardness of an iron-nickel-chromium alloy. [LMFBR  

SciTech Connect

Results of the research work show that the addition of 0.1% yttrium does not significantly change the mechanical properties of the AL1 alloy with temperature (even though the yttrium-doped samples did show a slight increase in yield stress and hardness for tests above 700/sup 0/C); the room temperature strength of the undoped AL1 alloy increases upon annealing at temperatures above 600/sup 0/C; and the room temperature uniform and fracture strains of the undoped AL1 alloy decrease upon annealing at temperatures above 600/sup 0/C.

Shah-Khan, M.Z.

1981-10-01

436

Programmed Cell Death in a Patient with Hepatocellular Carcinoma Treated with Yttrium-90 and Doxorubicin-loaded Beads.  

PubMed

Molecular analysis of apoptosis and autophagy pathways was performed from a single hepatocellular carcinoma treated with yttrium-90 and doxorubicin-loaded beads before resection and compared with normal liver tissue from the margins. Both bead formulations activated apoptosis-associated mechanisms and increased autophagy pathway protein levels. Increased DNA fragmentation and autophagy markers were seen in tumor treated with drug-eluting beads compared with yttrium-90-treated tumor. These results suggest that both microembolic therapies activate cell death signaling, although differences in apoptosis and autophagy pathways were seen in this patient. Knowledge of mechanisms of action for each treatment may enhance future therapeutic strategies. PMID:24070510

Meller, Robert; Galvan, Lorena; Lan, Jing Quan; Han, Esther; Bauer, Jason; Morris, Katherine T

2013-10-01

437

Spectroscopy of bismuth-doped lead–aluminum–germanate glass and yttrium–aluminum–silicate glass  

Microsoft Academic Search

In this work we make a comparison between the spectroscopy of bismuth-doped lead–aluminum–germanate (Bi:PAG) glass and bismuth-doped yttrium–aluminum–silicate (Bi:YAS) glass. We report the variation in Bi absorption, emission and lifetime as the PbO, Bi2O3 and Y2O3 contents of the two glass systems were varied. As PbO and Y2O3 contents were increased the absorption strength of Bi decreased in both Bi:PAG

M. A. Hughes; T. Suzuki; Y. Ohishi

2010-01-01

438

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

439

Dynamics of antiferromagnetic vortices in the domain wall of canted antiferromagnet-yttrium orthoferrite  

NASA Astrophysics Data System (ADS)

Dynamics of antiferromagnetic vortices accompanied by solitary deflection waves in domain walls of yttrium orthoferrite was investigated experimentally using real time two-fold high-speed digital photography. It was shown the dynamics is quasi-relativistic with the limiting velocity of 20km/s equal to spin-wave velocity on a linear part of its dispersion curve. It was shown that the dynamics is of gyroscopic origin. Effective magnetic field violating Lorenz-invariance dynamics is much greater than it was predicted theoretically.

Chetkin, M. V.; Kurbatova, Yu. N.; Shapaeva, T. B.

2003-03-01

440

Unidirectional anisotropy in the spin pumping voltage in yttrium iron garnet/platinum bilayers  

NASA Astrophysics Data System (ADS)

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 VSP 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, VSP exhibits a strong unidirectional anisotropy.

Vilela-Lea~O, L. H.; Salvador, C.; Azevedo, A.; Rezende, S. M.

2011-09-01

441

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

442

Synthesis, analysis and processing of novel materials in the yttrium oxide-aluminum oxide system  

Microsoft Academic Search

In the current work, liquid feed flame spray pyrolysis (LF-FSP) was used to create three novel nanopowders in the Y2O3-Al 2O3 system: alpha-Al2O3, YAG (garnet Y3Al5O12) and hexagonal Y3Al 5O12. For example, LF-FSP combustion of metalloorganic yttrium and aluminum precursors in a 3\\/5 ratio forms hexagonal Y3Al5O 12, a newly discovered crystalline phase detailed in this work. The resulting 15-35

Julien Claudius Marchal

2008-01-01

443

Effects of different fabrication techniques on the Yttrium-Barium-Copper oxide high temperature superconductor  

NASA Astrophysics Data System (ADS)

This study examines how several different parameters were changed in the yttrium-barium-copper oxide superconductor when the fabrication techniques were altered by using different barium precursors, including barium peroxide and barium carbonate; sintering at different temperatures, including 850, 900, 950 C; and annealing in an above ambient oxygen environment. Twelve different pellets were fabricated, and measurements were taken on them which included density, X-ray diffraction, critical temperature, critical current density, and magnetic susceptibility. The results showed that the barium peroxide derived samples had higher densities, better critical current densities and lower resistivities in the normal state.

Rhea, Paul A.

1988-12-01

444

Studies on the reaction of ammonium fluoride with lithium carbonate and yttrium oxide  

Microsoft Academic Search

The reaction of Y2O3 and Li2CO3 with NH4F to produce LiYF4 was studied by thermogravimetric and X-ray diffraction methods. NH4F reacts easily with Li2CO3 in a one-step exothermic process. Fluorination of yttrium oxide gives first YF3·1.5NH3 which which decomposes at 300–380°C to YF3 + NH3. This process is exothermic. In the absence of excess NH4F, an amount of YOF is

Ewa Kowalczyk; Ryszard Diduszko; Zbigniew Kowalcyzyk; Tomasz Leszczy?ski

1995-01-01

445

Mode locking of ceramic Nd:yttrium aluminum garnet with graphene as a saturable absorber  

NASA Astrophysics Data System (ADS)

The mode-locking of a ceramic Nd:yttrium aluminum garnet (YAG) solid-state laser (SSL) with solution processed graphene as saturable absorber (SA) was demonstrated. Transform-limited pulses with duration of 4 ps centered at 1064 nm were generated for a nondispersion compensated Nd:YAG SSL. Z-scan studies revealed that the graphene SA has a saturation intensity of 0.87 M W cm-2 and a normalized modulation depth of 17.4%. Our results illustrate the potential of using graphene as a mode locker for SSLs.

Tan, W. D.; Su, C. Y.; Knize, R. J.; Xie, G. Q.; Li, L. J.; Tang, D. Y.

2010-01-01

446

Preparation of yttrium-90-labeled human macroaggregated albumin for regional radiotherapy  

Microsoft Academic Search

Human macroaggregated albumin (MAA), which is currently labeled with technetium-99m (99mTc) and 99mTc-MAA, is used clinically as a pulmonary perfusion agent and was directly labeled with yttrium-90 (90Y)-acetate. This study evaluated whether 90Y-MAA could be a potential radiotherapeutic agent for regional radiotherapy against malignant tumors. MAA suspended in 0.1 M sodium acetate buffer, pH 5.8, was incubated with 90Y-acetate and

Naoyuki Watanabe; Noboru Oriuchi; Hitoshi Igarashi; Tetsuya Higuchi; Masashi Yukihiro; Yumi Fukushima; Katsumi Tomiyoshi; Tsuneo Hirano; Tomio Inoue; Keigo Endo

1997-01-01

447

Heat-induced damping modification in yttrium iron garnet/platinum hetero-structures  

NASA Astrophysics Data System (ADS)

We experimentally demonstrate the manipulation of magnetization relaxation utilizing a temperature difference across the thickness of an yttrium iron garnet/platinum hetero-structure: the damping is either increased or decreased depending on the sign of the temperature gradient. This effect might be explained by a thermally induced spin torque on the magnetization precession. The heat-induced variation of the damping is detected by microwave techniques as well as by a DC voltage caused by spin pumping into the adjacent Pt layer and the subsequent conversion into a charge current by the inverse spin Hall effect.

Jungfleisch, M. B.; An, T.; Ando, K.; Kajiwara, Y.; Uchida, K.; Vasyuchka, V. I.; Chumak, A. V.; Serga, A. A.; Saitoh, E.; Hillebrands, B.

2013-02-01

448

Spin mixing conductance at a well-controlled platinum/yttrium iron garnet interface  

NASA Astrophysics Data System (ADS)

A platinum (Pt)/yttrium iron garnet (YIG) bilayer system with a well-controlled interface has been developed; spin mixing conductance at the Pt/YIG interface has been studied. A clear interface with good crystal perfection is experimentally demonstrated to be one of the important factors for an ultimate spin mixing conductance. The spin mixing conductance is obtained to be 1.3 × 1018 m-2 at the well-controlled Pt/YIG interface, which is close to a theoretical prediction.

Qiu, Z.; Ando, K.; Uchida, K.; Kajiwara, Y.; Takahashi, R.; Nakayama, H.; An, T.; Fujikawa, Y.; Saitoh, E.

2013-08-01

449

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

450

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

NASA Astrophysics Data System (ADS)

Growth of nm-thick yttrium iron garnet films and ferromagnetic resonance (FMR) linewidth properties in the films are reported. The films were grown on gadolinium gallium garnet substrates by pulsed laser deposition (PLD). Films in the 5-35 nm thickness range showed a (111) orientation and a surface roughness between 0.1 and 0.3 nm. The 10 nm films showed a 10 GHz FMR linewidth of about 6 Oe and a damping constant of 3.2 × 10-4. The FMR linewidth increases with both the surface roughness and the surface Fe deficiency. Thicker films exhibit a smaller FMR linewidth and a lower damping constant.

Sun, Yiyan; Song, Young-Yeal; Chang, Houchen; Kabatek, Michael; Jantz, Michael; Schneider, William; Wu, Mingzhong; Schultheiss, Helmut; Hoffmann, Axel

2012-10-01

451

Yttrium ionization scheme development for Ti:Sa laser based RILIS  

NASA Astrophysics Data System (ADS)

Resonant ionization laser ion sources (RILIS) are popular ion sources if intense, radioactive ion beams (RIBs) with minimal isobaric contamination are required. The intensity of the ion beam depends strongly on the applied resonant laser ionization scheme. Based on the all solid state laser system TRIUMF's RILIS (TRILIS) is using, the off-line development towards an efficient ionization scheme for yttrium is presented. Several continuous wavelength scans have been performed to compare different nonresonant ionization schemes and to identify suitable Rydberg or autoionizing states for resonant ionization schemes.

Teigelhöfer, A.; Lassen, J.; Abboud, Z.; Bricault, P.; Heggen, H.; Kunz, P.; Li, R.; Quenzel, T.; Raeder, S.

2013-04-01

452

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

453

Photoreduction of methylviologen catalyzed by phthalocyanine complexes of yttrium(III) and lanthanoid(III) metals  

SciTech Connect

The preparation of phthalocyanine complexes of yttrium, samarium, gadolinium, ytterbium, and lutetium is reported. The PcLnAcO complex (Pc = phthalocyanine dianion and AcO = acetate anion) was found to act as the sensitizer for the photoreduction of methylviologen chloride (MVCl{sub 2}) in a methanol solution upon irradiation with visible light. On the basis of data from visible spectrophotometric studies and laser flash-photolysis studies, the observation is made that the photoreduction of metalophthalocyanine complexes proceeds via an oxidative process, and a reaction scheme is proposed. 15 refs., 2 figs.

Kasuga, Kuninobu; Takahashi, Seiji; Tsukahara, Keiichi (Shimane Univ., Matsue (Japan)); Ohno, Takeshi (Osaka Univ. (Japan))

1990-01-24

454

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.

Horwitz, Philip E. (Naperville, IL); Dietz, Mark L. (Evanston, IL)

1994-01-01

455

Fabrication and properties of neodymium-activated yttrium oxide optical ceramics  

NASA Astrophysics Data System (ADS)

About new technology of production of transparent ceramics including laser synthesis of nanopowders, their magnetic pulsed compaction and vacuum sintering is reported. The results of investigations of the synthesized samples of transparent ceramics made from neodymium-activated yttrium oxide are presented. It has been shown that in a 1.1 mm thickness sample with optical loss coefficient ?1.07?m = 0.03 cm-1 laser generation at ? g ˜ 1.08 ?m with a slope efficiency of 15% at laser diode pumping at a wavelength of 807 nm has been obtained.

Bagayev, S. N.; Osipov, V. V.; Ivanov, M. G.; Platonov, V. V.; Orlov, A. N.; Spirina, A. V.; Vatnik, S. M.; Kaygorodov, A. S.

2009-05-01

456

Raman scattering study of Czochralski-grown yttrium flouride single crystals  

SciTech Connect

Single crystals of yttrium fluoride YF[sub 3] have been grown by the Czokralski method and studied by Raman scattering in the temperature range 20 K - 730 K. The results are consistent with the prediction of the group theory analysis in the framework of the space group Pnma although two lines B2g are missing. There is no evidence for any structural phase transition in this temperature range. The structural relationship between the phase investigated and the high temperature phase (out of the temperature range studied) is discussed.

Rotereau, K.; Gesland, J.Y.; Daniel, P.; Bulou, A. (CNRS URA, LeMans, (France). Equipe de Physique de l'Etat Condense)

1993-08-01

457

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

458

Yttrium Iron Garnet Nanocrystals in Porous Glass of ~10 nm Pore Diameter  

NASA Astrophysics Data System (ADS)

We have previously reported the quantum size effect in light absorption spectra of magnetite and yttrium iron garnet (YIG) nanocrystals [1, 2]. In this paper, we have prepared a quantum dot structure by introducing the YIG nanocrystals into pores of the thirsty glass [3]. We report the preparation method and the optical properties of these materials. [1] S. Taketomi, H. Takahashi, N. Inaba and H. Miyajima, J. Phys. Soc. Jpn. 60, 3426 (1991). [2] S. Taketomi, K. Kawaguchi, Y. Otani, H. Miyajima, K. Kawasaki, and Y. Ozaki, IEEE Trans. Magn. 30, 945 (1994). [3] W. Haller, in Solid Phase Biochemistry edited by W. H. Scouten ( John Wiley, Sons, New York), Chap. 2.

Taketomi, Susamu; Ohuchi, Fumio S.

1998-03-01

459

Cyclic and Linear Polarization of Yttrium-Containing Iron-Based Amorphous Alloys  

SciTech Connect

Iron-based amorphous alloys are produced by rapid solidification from the melt. These alloys may possess unique mechanical and corrosion resistant properties. The chemical composition of the alloy may influence the cooling rate that is necessary for the alloys to be completely vitreous. At the same time, the corrosion resistance of the amorphous alloys may also depend on their chemical composition. This paper examines the anodic behavior of iron-based amorphous alloys containing three different concentrations (1, 3 and 5 atomic %) of yttrium (Y) in several electrolyte solutions. Results from polarization resistance potentiodynamic polarization show that when the alloy contains 5% atomic Y, the corrosion resistance decreases.

Day, S D; Lian, T; Farmer, J C; Rebak, R B

2007-08-10

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

A 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.

Horwitz, P.E.; Dietz, M.L.

1993-01-01

462

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

463

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

2001-06-15

464

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

465

Densification and microstructure development in the reaction sintering process of yttrium iron garnet  

Microsoft Academic Search

Factors affecting the densification and microstructure development in the reaction sintering process (RSP) of yttrium iron garnet were investigated. Three different powder mixtures were used: Fe2O3\\/Y2O3, Fe2O3\\/YFeO3 (1100 ° C calcined), and Fe2O3\\/YFeO3 (1200 ° C calcined). The conventionally prepared garnet powder was also adopted as a reference material. It was found that the RSP using Fe2O3-YFeO3 systems has a

R. J. Young; T. B. Wu; I. N. Lin

1990-01-01

466

Specific Heat of Yttrium Iron Garnet from 1.5° to 4.2°K  

Microsoft Academic Search

The specific heats of two samples of yttrium iron garnet have been measured between 1.5 and 4.2°K. The data have been analyzed into lattice- and spin-wave contributions characterized, respectively, by the Debye temperatures Theta1=538°K, Theta2=567°K, and by D1=0.81×10-28 erg-cm2, D2=0.85×10-28 erg-cm2, where D is defined by the dispersion relation for spin waves, ℏomega=Dk2.

Samuel S. Shinozaki

1961-01-01

467

Low noise K?-band hopping reflectometer based on yttrium iron garnet sources at TEXTOR.  

PubMed

The heterodyne hopping reflectometer system based on wide-tuned low noise yttrium iron garnet sources was developed for TEXTOR experiment. Being installed in 1998 it successfully operates more than 10 years providing the measurements of plasma density fluctuations. Owing to the advance multihorn antennae systems installed at three different positions around the tokamak, the correlation properties as well as the propagation measurements of plasma density fluctuations are realized. The reflectometer operates in ordinary polarization mode providing the access mostly to plasma gradient and pedestal region. The capabilities of the diagnostic are illustrated with the examples of measured fluctuation characteristics in the variety of TEXTOR plasmas. PMID:21456743

Soldatov, S; Krämer-Flecken, A; Zorenko, O

2011-03-01

468

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

2008-06-24

469

TUBE88 - A code which computes magnetic field lines  

NASA Astrophysics Data System (ADS)

TUBE88 computes magnetic field lines in cylindrical or toroidal geometry (using cylindrical coordinates (r, ?, z)) and calculates the intersections of those field lines with specified planes. It is an outgrowth of a code first written in 1967. A fourth-order predictor-corrector method is used to integrate the field line coordinates. The magnetic field may be computed in several ways: (a) through specification of currents flowing in very specific helical and circular elements together with a ``1/r'' field and a vertical field, (b) as a Fourier series in the angular variale or (c) in a specific coordinate system suited to a toroidally helical domain. Extensive graphics are provided for users of the Cray Time-Sharing System (CTSS). Applications of the code have included analysis of vacuum magnetic field configurations and post processing magnetic field data produced by MHD codes, for example. Current address: Sandia National Laboratory, Livermore, CA 94550, USA.

Mirin, A. A.; Martin, D. R.; O'Neill, N. J.

1989-04-01

470

Radiation Effects Testing at the 88-Inch Cyclotron at LBNL  

NASA Astrophysics Data System (ADS)

The effects of ionizing particles on sensitive microelectronics is an important component of the design of systems as diverse as satellites and space probes, detectors for high energy physics experiments and even internet server farms. Understanding the effects of radiation on human cells is an equally important endeavor directed towards future manned missions in space and towards cancer therapy. At the 88-Inch Cyclotron at the Berkeley Laboratory, facilities are available for radiation effects testing (RET) with heavy ions and with protons. The techniques for doing these measurements and the advantages of using a cyclotron will be discussed, and the Cyclotron facilities will be compared with other facilities worldwide. RET of the same part at several facilities of varying beam energy can provide tests of the simple models used in this field and elucidate the relative importance of atomic and nuclear effects. The results and implications of such measurements will be discussed.

McMahan, M. A.; Koga, R.

2002-01-01

471

Radiation effects testing at the 88-inch cyclotron at LBNL  

SciTech Connect

The effects of ionizing particles on sensitive microelectronics is an important component of the design of systems as diverse as satellites and space probes, detectors for high energy physics experiments and even internet server farms. Understanding the effects of radiation on human cells is an equally important endeavor directed towards future manned missions in space and towards cancer therapy. At the 88-Inch Cyclotron at the Berkeley Laboratory, facilities are available for radiation effects testing (RET) with heavy ions and with protons. The techniques for doing these measurements and the advantages of using a cyclotron will be discussed, and the Cyclotron facilities will be compared with other facilities worldwide. RET of the same part at several facilities of varying beam energy can provide tests of the simple models used in this field and elucidate the relative importance of atomic and nuclear effects. The results and implications of such measurements will be discussed.

McMahan, Margaret A.; Koga, Rokotura

2001-10-09

472

Yttrium-labelled peptides for therapy of NET.  

PubMed

Peptide receptor radionuclide therapy (PRRT) consists in the systemic administration of a synthetic peptide, labelled with a suitable beta-emitting radionuclide, able to irradiate tumours and their metastases via the internalization through a specific receptor, overexpressed on the cell membrane. After 15 years of experience, we can state that PRRT with (90)Y-labelled peptides is generally well tolerated. Acute side effects are usually mild, some of which are related to the co-administration of amino acids, such as nausea. Others are related to the radiopeptide, such as fatigue or the exacerbation of an endocrine syndrome, which rarely occurs in functioning tumours. Chronic and permanent effects on target organs, particularly the kidneys and the bone marrow, are generally mild if the necessary precautions are taken. Currently, the potential risk to kidney and red marrow limits the amount of radioactivity that may be administered. However, when tumour masses are irradiated with adequate doses, volume reduction may be observed. (90)Y-octreotide has been the most widely used radiopeptide in the first 8-10 years of experience. Unfortunately, all of the published results derive from different and inhomogeneous phase I/II studies. Hence, a direct comparison is virtually impossible to date. Nevertheless, even with these limitations, objective responses are registered in 10-34% of patients. The optimal timing of (90)Y-DOTATOC in the management of somatostatin receptor (SSTR)-positive tumours and the way in which it should be integrated with other treatments have yet to be defined, and prospective phase II/III trials comparing the efficacy and toxicity of different schemes of (90)Y-DOTATOC administration are still warranted. PMID:22388625

Bodei, Lisa; Cremonesi, Marta; Grana, Chiara M; Chinol, Marco; Baio, Silvia M; Severi, Stefano; Paganelli, Giovanni

2012-02-01

473

Mucus clearance, MyD88-dependent and MyD88-independent immunity modulate lung susceptibility to spontaneous bacterial infection and inflammation  

PubMed Central

It has been postulated that mucus stasis is central to the pathogenesis of obstructive lung diseases. In Scnn1b-transgenic (Scnn1b-Tg+) mice, airway-targeted overexpression of the epithelial Na+ channel ? subunit causes airway surface dehydration, which results in mucus stasis and inflammation. Bronchoalveolar lavage from neonatal Scnn1b-Tg+ mice, but not wild-type littermates, contained increased mucus, bacteria, and neutrophils, which declined with age. Scnn1b-Tg+ mice lung bacterial flora included environmental and oropharyngeal species, suggesting inhalation and/or aspiration as routes of entry. Genetic deletion of the Toll/Interleukin-1 receptor adapter molecule MyD88 in Scnn1b-Tg+ mice did not modify airway mucus obstruction, but caused defective neutrophil recruitment and increased bacterial infection, which persisted into adulthood. Scnn1b-Tg+ mice derived into germ-free conditions exhibited mucus obstruction similar to conventional Scnn1b-Tg+ mice and sterile inflammation. Collectively, these data suggest that dehydration-induced mucus stasis promotes infection, compounds defects in other immune mechanisms, and alone is sufficient to trigger airway inflammation.

Livraghi-Butrico, Alessandra; Kelly, E. Jane; Klem, Erich R.; Dang, Hong; Wolfgang, Matthew C.; Boucher, Richard C.; Randell, Scott H.; O'Neal, Wanda K.

2012-01-01

474

Mutational Analysis Identifies Residues Crucial for Homodimerization of Myeloid Differentiation Factor 88 (MyD88) and for Its Function in Immune Cells.  

PubMed

Myeloid differentiation factor 88 (MyD88) is an adaptor protein that transduces intracellular signaling pathways evoked by the Toll-like receptors (TLRs) and interleukin-1 receptors (IL-1Rs). MyD88 is composed of an N-terminal death domain (DD) and a C-terminal Toll/IL-1 receptor (TIR) domain, separated by a short region. Upon ligand binding, TLR/IL-1Rs hetero- or homodimerize and recruit MyD88 through their respective TIR domains. Then, MyD88 oligomerizes via its DD and TIR domain and interacts with the interleukin-1 receptor-associated kinases (IRAKs) to form the Myddosome complex. We performed site-directed mutagenesis of conserved residues that are located in exposed regions of the MyD88-TIR domain and analyzed the effect of the mutations on MyD88 signaling. Our studies revealed that mutation of Glu(183), Ser(244), and Arg(288) impaired homodimerization of the MyD88-TIR domain, recruitment of IRAKs, and activation of NF-?B. Moreover, overexpression of two green fluorescent protein (GFP)-tagged MyD88 mini-proteins (GFP-MyD88151-189 and GFP-MyD88168-189), comprising the Glu(183) residue, recapitulated these effects. Importantly, expression of these dominant negative MyD88 mini-proteins competed with the function of endogenous MyD88 and interfered with TLR2/4-mediated responses in a human monocytic cell line (THP-1) and in human primary monocyte-derived dendritic cells. Thus, our studies identify novel residues of the TIR domain that are crucially involved in MyD88 homodimerization and TLR signaling in immune cells. PMID:24019529

Loiarro, Maria; Volpe, Elisabetta; Ruggiero, Vito; Gallo, Grazia; Furlan, Roberto; Maiorino, Chiara; Battistini, Luca; Sette, Claudio

2013-09-09

475

Effect of composition on the oxygen tracer diffusion in transparent yttrium aluminium garnet (YAG) ceramics  

SciTech Connect

The grain boundary structure and oxygen tracer diffusion in transparent yttrium aluminum garnet (YAG) ceramics varying from 2% excess of Y{sub 2}O{sub 3} to 0.5% excess of Al{sub 2}O{sub 3} were studied. The characterization of the specimens is as follows: (1) For the Y{sub 2}O{sub 3}-excess specimen, a second phase (yttrium aluminum perovskite: YAP) containing silicon in the grain boundary was found. (2) For the Al{sub 2}O{sub 3}-excess specimen, both aluminum-rich particles (alumina) and a silicon-rich segregant layer were observed in the grain boundary. The volume diffusion of the oxygen tracer is little influenced by the excess composition. In contrast, the grain boundary diffusion of the oxygen tracer is suppressed in the Y{sub 2}O{sub 3}-excess specimens, compared to Al{sub 2}O{sub 3}-excess specimens. These differences are thought to result from the chemical reaction between the second phase and the intergranular liquid phase during the sintering.

Sakaguchi, Isao; Haneda, Hajime; Tanaka, Junzo [National Inst. for Research in Inorganic Materials, Ibaraki (Japan); Yanagitani, Takakimi [Kounoshima Chemical Co., Ltd., Kagawa (Japan). Takuma Works

1996-06-01

476

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

477

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

478

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

479

Reflectivity and thermally modulated reflectivity of yttrium, gadolinium, erbium and ytterbium iron garnets  

NASA Astrophysics Data System (ADS)

Optical reflectivity and thermoreflectivity measurements in the 2.5-4.7 eV region for gadolinium iron garnet, erbium iron garnet and ytterbium iron garnet are reported and discussed in relation to previous measurements performed on yttrium iron garnet. Near normal incidence reflectivity spectra of YbIG, ErIG, GdIG and YIG single crystals measured at room temperature and YIG measured at 80 K are shown to consist of two peaks centered around 3.3 and 4.4 eV and a number of structural features, demonstrating that the absolute reflectivity is not appreciably altered by the substitution of yttrium with heavier rare earth ions. Thermoreflectivity spectra of the same compounds taken at a temperature of 300 K are shown to contain the same number of positive and negative derivative peaks, which are strongly correlated with the reflectivity structures, and a gradual shift of the baseline with respect to YIG with increasing atomic weight. The experimental data for YbIG and YIG are analyzed in terms of a model describing the dielectric response of a system of localized excitations associated with a classical damped Lorentz operator. On the basis of the similarity of the rare earth spectra, assignments of YIG transitions are concluded to apply to the rare earth iron garnets, with the shift of the baseline with increasing atomic number attributed to the tailing of high-energy oscillators.

Balzarotti, A.; Picozzi, P.; Ricchiuto, A.; Santucci, S.

1980-12-01

480

Mechanistic study of the selective catalytic reduction of nitric oxide with methane over yttrium oxide  

SciTech Connect

The catalytic activity of nanocrystalline Group IIIB metal oxides for the reduction of nitric oxide with methane was shown to be comparable to that of Co-ZSM-5. The mechanism of selective catalytic reduction of nitric oxide with methane in excess oxygen was examined over nanocrystalline yttrium oxide. A series of heterogeneous and homogeneous reaction steps was proposed to account for the observed trends in catalytic properties. Methyl radicals generated at the catalyst surface desorb into the gas phase, where they react with nitric oxide to form nitrosomethane. Nitrosomethane then decomposes in a series of homogeneous and heterogeneous reactions to produce nitrogen and nitrous oxide. Evidence for gas-phase reaction of methyl radicals with nitric oxide was found in the adsorption studies of nitric oxide on yttrium oxide, the presence of ethane and ethene in the reactor effluent, catalytic studies involving nitrosomethane and nitromethane, as well as the successful prediction of methane selectivities based on a homogeneous reaction mechanism for methyl radical consumption. The proposed pathway for nitrogen production was supported by the observation of hydrogen cyanide under certain operating conditions, as well as adsorbed NCO species detected by infrared spectroscopy.

Fokema, M.D.; Ying, J.Y.

2000-05-15

481

Macrocyclic complexes of yttrium, the lanthanides and the actinides having peripheral coupling functionalities  

US Patent & Trademark Office Database

Symmetrically di-functionalized water soluble macrocyclic complexes of lanthanide, actinide and yttrium ions were obtained by metal templated, Schiff-base, cyclic condensation of: (1) a functionalized 1,2-diaminoethane and a dicarbonyl compound selected from the group consisting of 2,6-dicarbonylpyridine, 2,6-diformylpyridine, 2,5-dicarbonylfuran, 2,5-diformylfuran, 2,5-dicarbonyl-thiophene and 2,5-diformylthiophene; or (2) 1,2-diaminoethane and a ring-substituted heterocyclic dicarbonyl compound selected from a group consisting of substituted 2,6-dicarbonylpyridine, substituted 2,6-diformylpyridine, substituted 2,5-dicarbonylfuran, substituted 2,5-diformylfuran; substituted 2,5-dicarbonyl thiophene, and substituted 2,5-diformylthiophene. Asymmetrically functionalized water soluble macrocyclic complexes of the lanthanide, actinide and yttrium ions were obtained by metal templated, Schiff-base, cyclic condensation of appropriately substituted diamine and dicarbonyl precursors, with such precursors contributing two heteroaromatic moieties (pyridine, furan, thiophene, or a combination thereof) to the resulting macrocyclic structure. The coordination complexes thus formed are kinetically stable in dilute aqueous solution. They are further reacted, or coupled, through a substituent on the 1,2-diaminoethane or on the pyridine, furan, or thiophene moieties, to one of the following: proteinaceous materials, polysaccharides, polynucleotides, other biologically compatible macromolecules or bridging molecules which, can be further reacted or coupled to the above mentioned substrates. These macrocyclic complexes are suitable in the preparation of reporter molecules and for magnetic resonance, radiation imaging and radiation therapy.

1997-12-09

482

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

483

Thermal stability studies of plasma sprayed yttrium oxide coatings deposited on pure tantalum substrate  

NASA Astrophysics Data System (ADS)

Plasma sprayed Yttrium oxide is used for coating of crucibles and moulds that are used at high temperature to handle highly reactive molten metals like uranium, titanium, chromium, and beryllium. The alloy bond layer is severely attacked by the molten metal. This commonly used layer contributes to the impurity addition to the pure liquid metal. Yttrium oxide was deposited on tantalum substrates (25 mm × 10mm × 1mm thk and 40 mm × 8mm × 1mm thk) by atmospheric plasma spray technique with out any bond coat using optimized coating parameters. Resistance to thermal shock was evaluated by subjecting the coated specimens, to controlled heating and cooling cycles between 300K to 1600K in an induction furnace in argon atmosphere having <= 0.1ppm of oxygen. The experiments were designed to examine the sample tokens by both destructive and non-destructive techniques, after a predetermined number of thermal cycles. The results upto 24 thermal cycles of 25 mm × 10mm × 1mm thk coupons and upto 6 cycles of 40 mm × 8mm × 1mm thk coupons are discussed. The coatings produced with the optimized parameters were found to exhibit excellent thermal shock resistance.

Nagaraj, A.; Anupama, P.; Mukherjee, Jaya; Sreekumar, K. P.; Satpute, R. U.; Padmanabhan, P. V. A.; Gantayet, L. M.

2010-02-01

484

33 CFR 88.09 - Temporary exemption from light and shape requirements when operating under bridges.  

Code of Federal Regulations, 2013 CFR

...shape requirements when operating under bridges. 88.09 Section 88.09 Navigation...shape requirements when operating under bridges. A vessel's navigation lights...lowered if necessary to pass under a...

2013-07-01

485

40 CFR 141.88 - Monitoring requirements for lead and copper in source water.  

Code of Federal Regulations, 2010 CFR

...false Monitoring requirements for lead and copper in source water. 141.88 Section 141...WATER REGULATIONS Control of Lead and Copper § 141.88 Monitoring requirements for lead and copper in source water. (a) Sample...

2010-07-01

486

40 CFR 141.88 - Monitoring requirements for lead and copper in source water.  

Code of Federal Regulations, 2010 CFR

...Subpart I - Control of Lead and Copper] [Sec. 141.88 - Monitoring requirements for lead and copper in source water.] 40 PROTECTION...REGULATIONS-- Control of Lead and Copper Sec. 141.88 Monitoring...

2009-07-01

487

40 CFR 81.88 - Billings Intrastate Air Quality Control Region.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Billings Intrastate Air Quality Control Region. 81.88 Section 81...CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.88 Billings...

2013-07-01

488

46 CFR 64.88 - Plan approval, construction, and inspection of cargo-handling systems.  

Code of Federal Regulations, 2010 CFR

...2009-10-01 false Plan approval...cargo-handling systems. 64.88...CONTINUED) MARINE ENGINEERING MARINE PORTABLE...CARGO HANDLING SYSTEMS Cargo Handling... § 64.88 Plan approval...cargo-handling systems. Plans for the...

2009-10-01

489

46 CFR 64.88 - Plan approval, construction, and inspection of cargo-handling systems.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Plan approval...cargo-handling systems. 64.88...CONTINUED) MARINE ENGINEERING MARINE PORTABLE...CARGO HANDLING SYSTEMS Cargo Handling... § 64.88 Plan approval...cargo-handling systems. Plans for the...

2011-10-01

490

46 CFR 64.88 - Plan approval, construction, and inspection of cargo-handling systems.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Plan approval...cargo-handling systems. 64.88...CONTINUED) MARINE ENGINEERING MARINE PORTABLE...CARGO HANDLING SYSTEMS Cargo Handling... § 64.88 Plan approval...cargo-handling systems. Plans for the...

2010-10-01

491

42 CFR 412.88 - Additional payment for new medical service or technology.  

Code of Federal Regulations, 2012 CFR

... false Additional payment for new medical service or technology. 412.88 ...412.88 Additional payment for new medical service or technology. (a) For discharges involving new medical services or technologies that meet...

2012-10-01

492

40 CFR 88.312-93 - Inherently Low-Emission Vehicle labeling.  

Code of Federal Regulations, 2013 CFR

... false Inherently Low-Emission Vehicle labeling. 88.312-93 Section...PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES Clean-Fuel Fleet Program § 88.312-93 Inherently Low-Emission Vehicle labeling. (a) Label...

2013-07-01

493

40 CFR 88.304-94 - Clean-fuel Fleet Vehicle Credit Program.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Clean-fuel Fleet Vehicle Credit Program. 88.304-94 ...PROGRAMS (CONTINUED) CLEAN-FUEL VEHICLES Clean-Fuel Fleet Program § 88.304-94 Clean-fuel Fleet Vehicle Credit Program. (a)...

2013-07-01

494

40 CFR 88.204-94 - Sales requirements for the California Pilot Test Program.  

Code of Federal Regulations, 2010 CFR

...false Sales requirements for the California Pilot Test Program. 88.204-94...CONTINUED) CLEAN-FUEL VEHICLES California Pilot Test Program § 88.204-94 Sales requirements for the California Pilot Test Program. (a)...

2009-07-01

495

40 CFR 88.204-94 - Sales requirements for the California Pilot Test Program.  

Code of Federal Regulations, 2012 CFR

...false Sales requirements for the California Pilot Test Program. 88.204-94...CONTINUED) CLEAN-FUEL VEHICLES California Pilot Test Program § 88.204-94 Sales requirements for the California Pilot Test Program. (a)...

2012-07-01

496

40 CFR 88.206-94 - State opt-in for the California Pilot Test Program.  

Code of Federal Regulations, 2012 CFR

... false State opt-in for the California Pilot Test Program. 88.206-94...CONTINUED) CLEAN-FUEL VEHICLES California Pilot Test Program § 88.206-94 State opt-in for the California Pilot Test Program....

2012-07-01

497

40 CFR 88.204-94 - Sales requirements for the California Pilot Test Program.  

Code of Federal Regulations, 2010 CFR

...false Sales requirements for the California Pilot Test Program. 88.204-94...CONTINUED) CLEAN-FUEL VEHICLES California Pilot Test Program § 88.204-94 Sales requirements for the California Pilot Test Program. (a)...

2010-07-01

498

40 CFR 141.88 - Monitoring requirements for lead and copper in source water.  

Code of Federal Regulations, 2013 CFR

...requirements for lead and copper in source water. 141.88 Section 141.88 Protection...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) WATER PROGRAMS (CONTINUED) NATIONAL PRIMARY DRINKING WATER REGULATIONS Control of Lead and Copper...

2013-07-01

499

42 CFR 88.13 - WTC Program Administrator's certification of health conditions.  

Code of Federal Regulations, 2012 CFR

42 Public Health 1 2012-10-01 2012-10-01 false WTC Program Administrator's...certification of health conditions. 88.13 Section 88.13 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES...

2012-10-01

500

10 CFR 1040.88 - Remedial and affirmative action by recipients.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 false Remedial and affirmative action by recipients. 1040.88... § 1040.88 Remedial and affirmative action by recipients. (a...discrimination, a recipient may take affirmative action to overcome the effects...

2013-01-01