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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

Non-Target Activity Detection by Post-Radioembolization Yttrium-90 PET/CT: Image Assessment Technique and Case Examples  

PubMed Central

High resolution yttrium-90 (90Y) imaging of post-radioembolization microsphere biodistribution may be achieved by conventional positron emission tomography with integrated computed tomography (PET/CT) scanners that have time-of-flight capability. However, reconstructed 90Y PET/CT images have high background noise, making non-target activity detection technically challenging. This educational article describes our image assessment technique for non-target activity detection by 90Y PET/CT, which qualitatively overcomes the problem of background noise. We present selected case examples of non-target activity in untargeted liver, stomach, gallbladder, chest wall, and kidney, supported by angiography and 90Y bremsstrahlung single-photon emission computed tomography with integrated computed tomography (SPECT/CT) or technetium-99m macroaggregated albumin SPECT/CT. PMID:24551594

Kao, Yung Hsiang; Tan, Andrew E. H.; Lo, Richard H. G.; Tay, Kiang Hiong; Tan, Bien Soo; Chow, Pierce K. H.; Ng, David C. E.; Goh, Anthony S. W.

2013-01-01

3

Dendritic cell specific targeting of MyD88 signalling pathways in vivo.  

PubMed

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

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

2015-01-01

4

GEOHAZARDS '88GEOHAZARDS '88  

NASA Astrophysics Data System (ADS)

Durant's prophetic observation provided the perfect mantra for GEOHAZARDS '88, a symposium highlighting research on the causes, effects, and prediction of geologic and hydrologic hazards, held November 17-18, 1988, at the U.S. Geological Survey's Western Region Headquarters in Menlo Park, Calif. All three research divisions of the Survey—Geologic, Water Resources, and National Mapping—contributed to the program.USGS has long been engaged in research on hazardous environments resulting from geologic and hydrologic factors, and that research has been especially vigorous at its Western Region offices. It was appropriate therefore that this forum convene at the locus of tectonic ferment on the edge of the North American plate, adjacent to the San Andreas fault. An open house for the general public highlighting all aspects of USGS programs followed the symposium November 19. The purpose of GEOHAZARDS '88 was to provide an opportunity for USGS scientists and other investigators to talk with local, state, and federal officials who must react to the findings of Earth science research with judicious policy decisions. Making such decisions is neither easy nor enviable. Yet the citizenry demands and is entitled to enlightened policy regarding the hazardous geologic and hydrologic conditions with which we necessarily live, particularly on the west coast. California serves as de facto proving ground for building codes and land-use decisions because of the high frequency with which they are tested by natural events somewhere in the state.

Hodges, Carroll Ann

5

PRPARATION ET PROPRITS DES MONOCRISTAUX DE GRENATS DE FER ET D'YTTRIUM CONTENANT DU LANTHANE  

E-print Network

343. PR�PARATION ET PROPRI�T�S DES MONOCRISTAUX DE GRENATS DE FER ET D'YTTRIUM CONTENANT DU fonction de la température entre 88 °K et 323 °K à la fréquence de 9 080 MHz environ. La substitution de l'yttrium de grenats de fer et d'yttrium contenant de l'indium. Dans le present travail, nous 6tudierons la pr6

Paris-Sud XI, Université de

6

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

7

Diffusivities of hydrogen in yttrium and yttrium alloys  

SciTech Connect

Diffusivities of hydrogen in yttrium, yttrium-niobium (Y-Nb) alloy (3:7), yttrium-niobium (Y-Nb) composite (3:7), and yttrium-thorium (Y-Th) alloy (4:1) in the Sieverts region were measured by gas absorption in the temperature range from 960 to 1160/sup 0/K. The diffusivity of hydrogen in yttrium was found to be D = 300 exp(-160,000/RT), where R = 8.314 J.K/sup -1/.mol/sup -1/. Above 1000 K, diffusivities are in the following order: D(Y-Nb composite) > D(Y-Nb alloy) > D(Y-Th alloy) > D(Y), where D(Y-Nb composite) = 2.4 D(Y) and D(Y-Nb alloy) = 1.5 D(Y). Below 1000 K, effective diffusivities of the alloys become quite erratic and fall below those for yttrium.

Fisher, P.W.; Tanase, M.

1983-01-01

8

Measurement of cross-sections of yttrium (n,xn) threshold reactions by means of gamma spectroscopy  

E-print Network

Neutron activation and gamma spectrometry are usable also f or the determination of cross-sections of different neutron reactions. We have studied the cross-sections of yttrium (n, x n) threshold reactions using quasi-monoenergetic neutron source based on the reaction on 7 Li target at Nuclear Physics Institute of ASCR in Rez. Yttrium (n, x n) threshold reactions are suitable candidates for fast neutron field measurement by activation detectors. Fast neutron field monitoring is necessary already today at a wide range of accelerator facilities and will gain on importance in future fast reactors of generation IV, accelerator transmutation systems or fusion reactors. The knowledge of the cross-sections is crucial for such purpose. Unfortunately, the cross-section is sufficiently known only for 89 Y(n,2n) 88 Y reaction. For higher orders of reactions there are almost no experimental data. Special attention was paid to t he 89 Y(n,3n) 87 Y reaction. The cross-sections of both 89 Y(n,2n) 88 Y and 89 Y(n,3n) 87 Y re...

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

2014-01-01

9

Apoferritin-Templated Yttrium Phosphate Nanoparticle Conjugates for Radioimmunotherapy of Cancers  

SciTech Connect

We report a templated-synthetic approach based on apoferritin to prepare radionuclide nanoparticle (NP) conjugates. Non-radioactive yttrium (89Y) was used as model target and surrogate for radioyttrium (90Y) to prepare the nanoparticle conjugate. The center cavity and multiple channel structure of apoferritin offer a fast and facile method to precipitate yttrium phosphate by diffusing yttrium and phosphate ions into the cavity of apofrritin, resulting a core-shell nanocomposite. The yttrium phosphate/apoferritin nanoparticle was functionalized with biotin for further application. The synthesized nanoparticle was characterized by transmission electron microscopy (TEM) and x-ray photoelectron spectroscopy (XPS). We found that the resulting nanoparticles were uniform in size, with a diameter of around 8 nm. We tested the pre-targeting capability of the biotin-modified yttrium phosphate/apoferritin nanoparticle (yttrium phosphate/apoferritin nanoparticle) conjugate with streptavidin-modified magnetic beads and with aid of biotin-modified fluorecein isothiocyanate (FITC) tracer. This work shows that an yttrium phosphate NP conjugate provides a fast, simple and efficient method to prepare radioactive yttrium conjugate for applications in radioimmunotherapy of cancer.

Wu, Hong; Wang, Jun; Wang, Zheming; Fisher, Darrell R.; Lin, Yuehe

2008-05-01

10

Side Effects of Yttrium-90 Radioembolization  

PubMed Central

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

Riaz, Ahsun; Awais, Rafia; Salem, Riad

2014-01-01

11

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

NASA Astrophysics Data System (ADS)

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

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

2014-02-01

12

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

SciTech Connect

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

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

2014-02-07

13

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

Biosorption of scandium and yttrium from solutions  

Microsoft Academic Search

The usage of biosorbents allows separation of scandium and yttrium from each other and from Fe, Al, Ti, Si, and Ca in hydrometallurgical processing of ores and wastes. It was shown that sorption of scandium and yttrium increased with the increase in pH of solution. Initial rate of scandium sorption depended on the biomass type; however 85–98% of scandium was

G. I. Karavaiko; A. S. Kareva; Z. A. Avakian; V. I. Zakharova; A. A. Korenevsky

1996-01-01

15

Yttrium-doped lead tungstate crystals  

Microsoft Academic Search

In this paper we present results of a study on the yttrium doping in lead tungstate crystals. The crystal growth by modified Bridgman method is described. Results of trace analysis on raw materials and crystals are presented. The segregation coefficient of yttrium ions in lead tungstate crystals was determined. The scintillation emission and longitudinal transmittance spectra, light output, decay kinetics,

Xiangdong Qu; Liyuan Zhang; Ren-Yuan Zhu; Jingying Liao; Dingzhong Shen; Zhiwen Yin

2002-01-01

16

SU-E-J-88: Margin Reduction of Level II/III Planning Target Volume for Image-Guided Simultaneous Integrated Boost Head-And-Neck Treatment  

SciTech Connect

Purpose: To investigate the feasibility of improved normal tissue sparing for head-and-neck (H'N) image-guided radiotherapy (IGRT) by employing tighter CTV-to-PTV margins for target level II/III though a GPU-based deformable image registration and dose accumulation framework. Methods: Ten H'N simultaneous integrated boost cases treated on TomoTherapy were retrospectively analyzed. Weekly kVCT scans in addition to daily MVCT scans were acquired for each patient. Reduced margin plans were generated with 0- mm margin for level II and III PTV (while 3-5 mm margin for PTV1) and compared with the standard margin plan using 3-5mm margin to all CTV1-3 (reference plan). An in-house developed GPU-based 3D image deformation tool was used to register and deform the weekly KVCTs with the planning CT and determine the delivered mean/minimum/maximum dose, dose volume histograms (DVHs), etc. Results: Compared with the reference plans, the averaged cord maximum, the right and left parotid doses reduced by 22.7 %, 16.5 %, and 9 % respectively in the reduced margin plans. The V95 for PTV2 and PTV3 were found within 2 and 5% between the reference and tighter margin plans. For the reduced margin plans, the averaged cumulative mean doses were consistent with the planned dose for PTV1, PTV2 and PTV3 within 1.5%, 1.7% and 1.4%. Similar dose variations of the delivered dose were seen for the reference and tighter margin plans. The delivered maximum and mean doses for the cord were 3.55 % and 2.37% higher than the planned doses; a 5 % higher cumulative mean dose for the parotids was also observed for the delivered dose than the planned doses in both plans. Conclusion: By imposing tighter CTV-to-PTV margins for level II and III targets for H'N irradiation, acceptable cumulative doses were achievable when coupled with weekly kVCT guidance while improving normal structure sparing.

Can, S; Neylon, J; Qi, S; Santhanam, A; Low, D [UCLA, Los Angeles, CA (United States)

2014-06-01

17

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

18

Absolute measurements of fast neutrons using yttrium.  

PubMed

Yttrium is presented as an absolute neutron detector for pulsed neutron sources. It has high sensitivity for detecting fast neutrons. Yttrium has the property of generating a monoenergetic secondary radiation in the form of a 909 keV gamma-ray caused by inelastic neutron interaction. It was calibrated numerically using MCNPX and does not need periodic recalibration. The total yttrium efficiency for detecting 2.45 MeV neutrons was determined to be f(n) approximately 4.1x10(-4) with an uncertainty of about 0.27%. The yttrium detector was employed in the NX2 plasma focus experiments and showed the neutron yield of the order of 10(8) neutrons per discharge. PMID:20815606

Roshan, M V; Springham, S V; Rawat, R S; Lee, P; Krishnan, M

2010-08-01

19

Absolute measurements of fast neutrons using yttrium  

SciTech Connect

Yttrium is presented as an absolute neutron detector for pulsed neutron sources. It has high sensitivity for detecting fast neutrons. Yttrium has the property of generating a monoenergetic secondary radiation in the form of a 909 keV gamma-ray caused by inelastic neutron interaction. It was calibrated numerically using MCNPX and does not need periodic recalibration. The total yttrium efficiency for detecting 2.45 MeV neutrons was determined to be f{sub n}{approx}4.1x10{sup -4} with an uncertainty of about 0.27%. The yttrium detector was employed in the NX2 plasma focus experiments and showed the neutron yield of the order of 10{sup 8} neutrons per discharge.

Roshan, M. V.; Springham, S. V.; Rawat, R. S.; Lee, P.; Krishnan, M. [National Institute of Education, Nanyang Technological University, Singapore, 637616 (Singapore)

2010-08-15

20

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

21

Synthesis and structural characterisation of an yttrium-alkyl-alkylidene   

E-print Network

The first structurally authenticated yttrium-alkyl-alkylidene is reported; structural, spectroscopic, and theoretical analyses show that whilst the yttrium-alkylidene bond is short, it possesses a bond order less than one and is comparable to the Y...

Arnold, Polly; Green, J.C.; McMaster, J.; Liddle, S.T.

2008-04-01

22

Revisiting Charter 88  

Microsoft Academic Search

This article reviews the emergence of Charter 88 as a response to a particular political conjuncture in British politics. It argues that its programme of reform was not so much an attempt to resolve a political crisis that had proved unmanageable within the existing constitutional settlement, as an attempt to redefine and achieve the political goals of the liberal left

Michael Rustin

2009-01-01

23

Yttrium hydride nanoantennas for active plasmonics  

NASA Astrophysics Data System (ADS)

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

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

2014-09-01

24

Discrete Yttrium(III) Complexes as Lactide Polymerization Catalysts  

E-print Network

Discrete Yttrium(III) Complexes as Lactide Polymerization Catalysts Bradley M. Chamberlain report the synthesis and full characterization of novel yttrium complexes ligated to the multidentate similar dinuclear structures for the two com- plexes.10 Each yttrium is ligated by three macrocyclic

Hagadorn, John R.

25

Europium-doped yttrium silicate nanophosphors prepared by flame synthesis  

E-print Network

Europium-doped yttrium silicate nanophosphors prepared by flame synthesis Xiao Qin a,*, Yiguang Ju; accepted 7 November 2006 Available online 22 December 2006 Abstract Europium-doped yttrium silicate (Y2SiO5 and photoluminescence intensity of Y2SiO5:Eu3+ nanophosphors are strongly affected by the ratio of silicon to yttrium

Bernhard, Stefan

26

Mixed-ligand complexes of yttrium-90 dialkyldithiocarbamates with 1,10-phenanthroline as a possible agent for therapy of hepatocellular carcinoma.  

PubMed

Yttrium-90 is a radioelement which has found wide use in targeted radionuclide therapy because of its attractive physical and chemical properties. Radioembolisation of hepatocellular carcinoma with radiolabelled Lipiodol is a method of choice. We have synthesised a series of alkyldithiocarbamate yttrium complexes, easily extracted into Lipiodol due to their high lipophilicity. Among the prepared series, a new radioconjugate, which is stable over an extended period of time, has been prepared, and could represent a potential treatment procedure for hepatocellular carcinoma. PMID:25238135

Lopez, A; Noiret, N; Garin, E; Lepareur, N

2014-12-01

27

Proton trapping in yttrium-doped barium zirconate.  

PubMed

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. PMID:23666383

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

2013-07-01

28

Physical and electrical characterization of ultrathin yttrium silicate insulators on silicon  

Microsoft Academic Search

This article describes the oxidation of yttrium on silicon to form yttrium silicate films for application as high dielectric constant insulators. The high reactivity of yttrium metal with silicon and oxygen is utilized to form amorphous yttrium silicate films with a minimal interfacial silicon dioxide layer. Yttrium silicate films (~40 Å) with an equivalent silicon dioxide thickness of ~11 Å

J. J. Chambers; G. N. Parsons

2001-01-01

29

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

30

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

31

Low energy cyclotron production and separation of yttrium-86 for evaluation of monoclonal antibody pharmacokinetics and dosimetry  

NASA Astrophysics Data System (ADS)

Although an excellent radionuclide for application to systemic isotopic therapy when complexed to various monoclonal antibodies, the lack of photon emission from yttrium-90 makes the determination of the pharmacokinetics and dosimetry of the resultant radiopharmaceutical difficult. The introduction of the positron-emitting radionuclide yttrium-86 (T1/2=14.7 h, ?+=33%) provides the non-invasive quantitation for the biodistribution of the chelated complex. The yttrium-86 radionuclide is produced at Memorial Sloan-Kettering using the CS-15 cyclotron via the (p,n) nuclear reaction on an enriched strontium-86 target. The separation is effectively achieved through a combination of solvent extraction and ion exchange chromatography. Once investigational new drug approval has been received, the mixed nuclides, Y-90 and Y-86, are to be used to formulate the HuM195 labeled monoclonal antibody, a radiopharmaceutical under active investigation against hematopoietic progenitor cells.

Finn, R. D.; McDevitt, M.; Ma, D.; Jurcic, J.; Scheinberg, D.; Larson, S.; Shoner, S.; Link, J.; Krohn, K.; Schlyer, D.

1999-06-01

32

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

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Yttrium borate phosphate vanadate with europium...Chemical Substances § 721.10627 Yttrium borate phosphate vanadate with europium...chemical substance identified generically as yttrium borate phosphate vanadate with...

2013-07-01

33

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

Code of Federal Regulations, 2014 CFR

...2014-07-01 2014-07-01 false Yttrium borate phosphate vanadate with europium...Chemical Substances § 721.10627 Yttrium borate phosphate vanadate with europium...chemical substance identified generically as yttrium borate phosphate vanadate with...

2014-07-01

34

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

35

Photoconductivity of Yttrium Neodymium Gadolinium Oxalate Crystals  

NASA Astrophysics Data System (ADS)

Crystals are pillars of modern technology..Yttrium Neodymium Gadolinium oxalate (YNdGaOx) crystals were grown by gel method by the diffusion of Yttrium Chloride, Neodymium Chloride, and Gadolinium Chloride into the set gel containing Oxalic acid. Silica gel method is capable of yielding crystals of high optical perfection and wide morphology. The growing crystals are held in the gel medium in a strain free manner and at the same time nucleation and super saturation are well controlled. Photo conductivity studies of these crystals revealed negative photoconductivity nature. The photocurrent is found to be less than the dark current at every applied electric field. Rare Earth compounds are known for their interesting electric, magnetic and luminescent properties. Recent investigations on the fluorescence of some rare earth oxalates suggest their potentiality for their optical applications. Rare Earth oxalates evoked greater attention because of their ionic conduction.

Kuryan, Soosy; Abraham, Rosalin; Isac, Jayakumari

2007-03-01

36

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

37

Oxidative methane activation over yttrium stabilised zirconia.  

PubMed

The methane C-H bond is extremely stable, requiring significant energy input in reforming processes. We present a novel mechanism for energetically favourable methane C-H bond breaking over yttrium stabilised zirconia in the presence of oxygen, based on results of Density Functional Theory (DFT) and HSE06 hybrid functional calculations. We argue that this mechanism will be relevant to C-H activation over many metal oxide catalyst materials. PMID:25724018

Cooper, C S; Oldman, R J; Catlow, C R A

2015-04-01

38

Divalent ytterbium ions in yttrium aluminum garnet and yttrium oxide ceramics  

NASA Astrophysics Data System (ADS)

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

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

2014-12-01

39

Safety of Repeated Yttrium-90 Radioembolization  

SciTech Connect

Purpose: Repeated radioembolization (RE) treatments carry theoretically higher risk of radiation-induced hepatic injury because of the liver's cumulative memory of previous exposure. We performed a retrospective safety analysis on patients who underwent repeated RE. Methods: From 2004 to 2011, a total of 247 patients were treated by RE. Eight patients (5 men, 3 women, age range 51-71 years) underwent repeated treatment of a targeted territory, all with resin microspheres (SIR-Spheres; Sirtex, Lane Cove, Australia). Adverse events were graded during a standardized follow-up. In addition, the correlation between the occurrence of RE-induced liver disease (REILD) and multiple variables was investigated in univariate and multivariate analyses in all 247 patients who received RE. Results: Two patients died shortly after the second treatment (at 84 and 107 days) with signs and symptoms of REILD. Both patients underwent whole liver treatment twice (cumulative doses 3.08 and 2.66 GBq). The other 6 patients demonstrated only minor toxicities after receiving cumulative doses ranging from 2.41 to 3.88 GBq. All patients experienced objective tumor responses. In the whole population, multifactorial analysis identified three risk factors associated with REILD: repeated RE (p = 0.036), baseline serum total bilirubin (p = 0.048), and baseline serum aspartate aminotransferase (p = 0.043). Repeated RE proved to be the only independent risk factor for REILD in multivariate analysis (odds ratio 9.6; p = 0.002). Additionally, the administered activity per target volume (in GBq/L) was found to be an independent risk factor for REILD, but only in whole liver treatments (p = 0.033). Conclusion: The risk of REILD appears to be elevated for repeated RE. Objective tumor responses were observed, but establishment of safety limits will require improvement in dosimetric measurement and prediction.

Lam, Marnix G. E. H.; Louie, John D. [Stanford University School of Medicine, Division of Interventional Radiology (United States)] [Stanford University School of Medicine, Division of Interventional Radiology (United States); Iagaru, Andrei H.; Goris, Michael L. [Stanford University School of Medicine, Division of Nuclear Medicine (United States)] [Stanford University School of Medicine, Division of Nuclear Medicine (United States); Sze, Daniel Y., E-mail: dansze@stanford.edu [Stanford University School of Medicine, Division of Interventional Radiology (United States)

2013-10-15

40

Synthesis of yttrium aluminum garnet by reverse strike precipitation  

Microsoft Academic Search

Yttrium aluminum garnet (YAG) powders were synthesized by normal and reverse strike precipitation from a mixed solution containing aluminum and yttrium nitrates. The precipitates were characterized by FTIR, DTA, and TGA techniques. The amorphous precipitates were crystallized under various atmospheres (air, argon, hydrogen) at different temperatures and the product analyzed by X-ray diffraction. Only reverse strike precipitation followed by crystallization

Prasad Apte; Harry Burke; Helen Pickup

1992-01-01

41

Dopant distribution in nominally yttrium-doped sapphire  

Microsoft Academic Search

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

James D. Cawley; J. W. Halbran

1986-01-01

42

A study on yttrium doping in lead tungstate crystals  

Microsoft Academic Search

In this paper we present results of a study on the yttrium doping in lead tungstate crystals. The crystal growth by modified Bridgman method is described. Results of trace analysis on raw materials and crystals are presented. The segregation coefficient of yttrium ions in lead tungstate crystals was determined. The scintillation emission and longitudinal transmittance spectra, light output, decay kinetics,

Xiangdong Qu; Liyuan Zhang; Ren-Yuan Zhu; Jingying Liao; Dingzhong Shen; Zhiwen Yin

2002-01-01

43

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

E-print Network

Defect Chemistry of Yttrium-Doped Barium Zirconate: A Thermodynamic Analysis of Water Uptake incorporation reaction in yttrium-doped BaZrO3 with 20-40% yttrium in the temperature range 50-1000 °C under of the hydration. The hydration reaction constants are largely independent of yttrium concentration, in agreement

44

Terbium photoluminescence in yttrium aluminum garnet xerogels  

SciTech Connect

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

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

2009-02-15

45

Theory of hydrogen pairing in yttrium  

SciTech Connect

The energetics of hydrogen atoms interacting with yttrium have been investigated using the self-consistent cluster model and the local-density approximation. Our results provide a theoretical understanding of a range of novel phenomena observed recently in resistivity, neutron scattering, NMR, and channeling experiments. These include pairing of hydrogen at low temperatures and the pairs structural origin, the anomalous fast diffusion of hydrogen along the pairing axis compared to the bulk rate, and the lack of long-range order between the pairs in the metal matrix.

Khanna, S.N.; Liu, F.; Challa, M.; Jena, P.

1989-09-25

46

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

E-print Network

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

47

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

E-print Network

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

48

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

E-print Network

184 YTTRIUM1 (Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2010. All yttrium, simulant gemstones, and wear-resistant and corrosion-resistant cutting tools. In electronics, yttrium

49

(Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2007. All  

E-print Network

188 YTTRIUM1 (Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was not mined in the United States in 2007. All yttrium-ray-intensifying screens. Yttrium also was used as a stabilizer in zirconia, in alumina-zirconia abrasives, wear

50

Implanting yttrium and oxygen ions at semiconductor/insulator interface  

SciTech Connect

A semiconductor device comprising an insulating substrate such as sapphire and a semiconductor element region formed on the substrate, wherein an insulating layer containing yttrium or a lanthanide element is interposed between the substrate and semiconductor element region. A method of manufacturing a semiconductor device such as MOS/SOS wherein yttrium or a lanthanide element is ion implanted into an interface between the substrate and the semiconductor film formed on the substrate to form an insulating layer containing yttrium or a lanthanide element at the interface.

Ohno, J.; Ohta, T.

1985-01-22

51

21 CFR 500.88 - Regulatory method.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 false Regulatory method. 500.88 Section 500.88...Animals § 500.88 Regulatory method. (a) The sponsor shall submit for evaluation and validation a regulatory method developed to monitor...

2012-04-01

52

21 CFR 500.88 - Regulatory method.  

Code of Federal Regulations, 2014 CFR

...2014-04-01 false Regulatory method. 500.88 Section 500.88...Animals § 500.88 Regulatory method. (a) The sponsor shall submit for evaluation and validation a regulatory method developed to monitor...

2014-04-01

53

21 CFR 500.88 - Regulatory method.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Regulatory method. 500.88 Section 500.88...Animals § 500.88 Regulatory method. (a) The sponsor shall submit for evaluation and validation a regulatory method developed to monitor...

2013-04-01

54

21 CFR 500.88 - Regulatory method.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Regulatory method. 500.88 Section 500.88...Animals § 500.88 Regulatory method. (a) The sponsor shall submit for evaluation and validation a regulatory method developed to monitor...

2011-04-01

55

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

E-print Network

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

Hickey, Barbara

56

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. PMID:17878942

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

57

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

E-print Network

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

Paris-Sud XI, Université de

58

STS-88 Mission Specialists Krikalev and Newman inside Endeavour  

NASA Technical Reports Server (NTRS)

STS-88 Mission Specialists Sergei Konstantinovich Krikalev (left) and James H. Newman (right) sit inside orbiter Endeavour during Terminal Countdown Demonstration Activities (TCDT). The TCDT includes mission familiarization activities, emergency egress training, and the simulated main engine cut-off exercise. Mission STS-88 is targeted for launch on Dec. 3, 1998. It is the first U.S. flight for the assembly of the International Space Station and will carry the Unity connecting module. Unity will be mated with the already orbiting Russian-built Zarya control module. The 12-day mission includes three planned spacewalks to connect power, data and utility lines and install exterior equipment.

1998-01-01

59

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

60

Structural phase transitions in yttrium under ultrahigh pressures.  

PubMed

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

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

2012-09-12

61

Tungsten - Yttrium Based Nuclear Structural Materials  

NASA Astrophysics Data System (ADS)

The challenging problem currently facing the nuclear science community in this 21st century is design and development of novel structural materials, which will have an impact on the next-generation nuclear reactors. The materials available at present include reduced activation ferritic/martensitic steels, dispersion strengthened reduced activation ferritic steels, and vanadium- or tungsten-based alloys. These materials exhibit one or more specific problems, which are either intrinsic or caused by reactors. This work is focussed towards tungsten-yttrium (W-Y) based alloys and oxide ceramics, which can be utilized in nuclear applications. The goal is to derive a fundamental scientific understanding of W-Y-based materials. In collaboration with University of Califonia -- Davis, the project is designated to demonstrate the W-Y based alloys, ceramics and composites with enhanced physical, mechanical, thermo-chemical properties and higher radiation resistance. Efforts are focussed on understanding the microstructure, manipulating materials behavior under charged-particle and neutron irradiation, and create a knowledge database of defects, elemental diffusion/segregation, and defect trapping along grain boundaries and interfaces. Preliminary results will be discussed.

Ramana, Chintalapalle; Chessa, Jack; Martinenz, Gustavo

2013-04-01

62

Neodymium-doped laser yttrium oxide ceramics  

SciTech Connect

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 m{sup 1/2} and H{sub {nu}} = 11.8 GPa, respectively. Ceramic samples sintered in the temperature range from 1550 to 2050{sup 0}C have the porosity (1-150)x10{sup -4}% and the optical loss coefficient {alpha}{sub 1.07} = 0.03-2.1 cm{sup -1} at a wavelength of 1.07 {mu}m. It is shown that such porosity does not affect the optical loss coefficient of light. Lasing at {approx}1.079 {mu}m with a slope efficiency of 15% was obtained in a 1.1-mm-thick sample pumped by laser diodes. (active media. lasers)

Bagaev, S N; Vatnik, S M; Vedin, I A; Maiorov, A P; Pestryakov, E V [Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk (Russian Federation); Osipov, V V; Ivanov, M G; Solomonov, V I; Platonov, V V; Orlov, A N; Rasuleva, A V; Ivanov, V V; Kaigorodov, A S; Khrustov, V R [Institute of Electrophysics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg (Russian Federation); Shestakov, A V [ELS-94 Limited Liability Company, Research and Production Center, Moscow (Russian Federation); Salkov, A V [Elakom Limited Liability Company, Moscow (Russian Federation)

2008-09-30

63

Yttrium implantation and addition element effects on high temperature oxidation behaviour of reference steels  

Microsoft Academic Search

Yttrium implanted and unimplanted various reference steels were oxidized at 700 ^{circ}C, under controlled atmosphere (oxygen partial pressure: 0.04 Pa), for 24 h to observe the yttrium implantation and the addition element effects on steel high temperature oxidation behaviours. Yttrium implantation effects on reference steels were characterized using analytical and structural techniques such as Rutherford Backscattering Spectrometry (RBS), Reflection High

E. Caudron; F. Riffard; H. Buscail; R. Cueff; C. Issartel; S. Perrier

2002-01-01

64

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

Code of Federal Regulations, 2010 CFR

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

2010-07-01

65

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

Code of Federal Regulations, 2011 CFR

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

2011-07-01

66

40 CFR 721.10009 - Manganese yttrium oxide (MnYO3).  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Manganese yttrium oxide (MnYO3). 721.10009 Section...Substances § 721.10009 Manganese yttrium oxide (MnYO3). (a) Chemical substance...chemical substance identified as manganese yttrium oxide (MnYO3 ) (PMN...

2011-07-01

67

40 CFR 721.10013 - Manganese yttrium oxide (Mn2YO5).  

Code of Federal Regulations, 2014 CFR

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

2014-07-01

68

Speciation of adsorbed yttrium and rare earth elements on oxide surfaces  

E-print Network

Speciation of adsorbed yttrium and rare earth elements on oxide surfaces Wojciech Piasecki, Dimitri 10 June 2008 Abstract The distribution of yttrium and the rare earth elements (YREE) between natural. INTRODUCTION The relative abundances of yttrium and the rare earth elements (YREE) are widely used tracers

Sverjensky, Dimitri A.

69

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 Section...Substances § 721.10009 Manganese yttrium oxide (MnYO3 ). (a) Chemical...chemical substance identified as manganese yttrium oxide (MnYO3 ) (PMN...

2013-07-01

70

Viewpoint Paper Unraveling the defect chemistry and proton uptake of yttrium-doped  

E-print Network

Viewpoint Paper Unraveling the defect chemistry and proton uptake of yttrium-doped barium zirconate Abstract--A review of the experimental literature documenting water uptake in yttrium-doped barium uptake; Defect chemistry; Fuel cells 1. Introduction Amongst proton-conducting oxides, yttrium

71

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

E-print Network

Cation non-stoichiometry in yttrium-doped barium zirconate: phase behavior, microstructure-stoichiometry by incorporation of yttrium on the A-site. The dopant partitioning can explain the decrease in cell constant conductivity. Barium zirconate, specifically yttrium-doped BaZrO3, has attracted particular attention amongst

72

Atomistic Modeling of Native Point Defects in Yttrium Aluminum Garnet Crystals  

E-print Network

Atomistic Modeling of Native Point Defects in Yttrium Aluminum Garnet Crystals Maija M. Kuklja point defects in yttrium aluminum garnet (YAG) are studied in the framework of the pair is accommodated by the formation of antisites, rather than vacancies, in the lattice. I. Introduction YTTRIUM

Pandey, Ravi

73

40 CFR 721.10013 - Manganese yttrium oxide (Mn2YO5).  

Code of Federal Regulations, 2010 CFR

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

2010-07-01

74

40 CFR 721.10013 - Manganese yttrium oxide (Mn2YO5).  

Code of Federal Regulations, 2011 CFR

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

2011-07-01

75

CHALEUR SPCIFIQUE ET SUSCEPTIBILIT MAGNTIQUE DES SOLUTIONS SOLIDES DILUES D'YTTRIUM-GADOLINIUM (1)  

E-print Network

98. CHALEUR SP�CIFIQUE ET SUSCEPTIBILIT� MAGN�TIQUE DES SOLUTIONS SOLIDES DILU�ES D'YTTRIUM (6). Résumé. - On a mesuré la chaleur spécifique et la susceptibilité magnétique des alliages d'yttrium and the magnetic susceptibility of yttrium solid solutions with magnetic impurities of gadolinium are reported

Paris-Sud XI, Université de

76

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

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Phosphoric acid, yttrium(3+) salt (1:1). 721.10177...Substances § 721.10177 Phosphoric acid, yttrium(3+) salt (1:1). (a) Chemical...substance identified as phosphoric acid, yttrium(3+) salt (1:1) (PMN...

2012-07-01

77

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

E-print Network

Improved tensile creep properties of yttrium- and lanthanum-doped alumina: a solid solution effect, Pennsylvania 18015 (Received 16 March 2000; accepted 30 October 2000) The tensile creep behavior of yttrium ppm yttrium, 100 ppm lanthanum) exhibited a uniform microstructure consisting of fine, equiaxed grains

Cho, Junghyun

78

Processing of yttrium-doped barium zirconate for high proton conductivity  

E-print Network

Processing of yttrium-doped barium zirconate for high proton conductivity Peter Babilo Materials the transport properties of yttrium-doped barium zirconate (BYZ) have been explored, with the aim of attaining are arguably those of Iguchi et al.1 Using yttrium-doped barium cerate as an electrolyte, these authors

79

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

E-print Network

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

80

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 Section...Substances § 721.10013 Manganese yttrium oxide (Mn2 YO5 ). (a) Chemical...chemical substance identified as manganese yttrium oxide (Mn2 YO5 ) (PMN...

2013-07-01

81

40 CFR 721.10009 - Manganese yttrium oxide (MnYO3).  

Code of Federal Regulations, 2010 CFR

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

2010-07-01

82

40 CFR 721.10009 - Manganese yttrium oxide (MnYO3).  

Code of Federal Regulations, 2014 CFR

...2014-07-01 2014-07-01 false Manganese yttrium oxide (MnYO3). 721.10009 Section...Substances § 721.10009 Manganese yttrium oxide (MnYO3 ). (a) Chemical...chemical substance identified as manganese yttrium oxide (MnYO3 ) (PMN...

2014-07-01

83

High birefringence of the yttrium vanadate crystal in the middle wavelength infrared  

E-print Network

High birefringence of the yttrium vanadate crystal in the middle wavelength infrared H. T. Luo, T 64919) A high birefringence of over 0.21 for the yttrium vanadate YVO4 crystal in the middle wavelength it transmits up to 5 m and posses high birefringence of over 0.2.2 Very re- cently, the yttrium vanadate YVO4

Dereniak, Eustace L.

84

Effects of surface pretreatments on interface structure during formation of ultra-thin yttrium silicate  

E-print Network

Effects of surface pretreatments on interface structure during formation of ultra-thin yttrium-thin ®lms of mixed yttrium, silicon, and oxygen, formed by oxidation of metal on clean and pre- treated silicon. XPS and MEIS analyses indicate that oxidation of yttrium on bare silicon results in a fully

Gustafsson, Torgny

85

Ligand-Assisted Rate Acceleration in Transacylation by a Yttrium-Salen  

E-print Network

Ligand-Assisted Rate Acceleration in Transacylation by a Yttrium-Salen Complex. Demonstration, 2002 ABSTRACT Yttrium-salen complexes effect transacylation between enolesters and chiral secondary. In this Letter we report the synthesis, characterization, and application of a class of yttrium complexes

RajanBabu, T. V. "Babu"

86

40 CFR 721.10013 - Manganese yttrium oxide (Mn2YO5).  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Manganese yttrium oxide (Mn2YO5). 721.10013 Section...Substances § 721.10013 Manganese yttrium oxide (Mn2 YO5 ). (a) Chemical...chemical substance identified as manganese yttrium oxide (Mn2 YO5 ) (PMN...

2012-07-01

87

Birefringence of yttrium vanadate single crystals in the middle wavelength infrared  

E-print Network

Birefringence of yttrium vanadate single crystals in the middle wavelength infrared Haitao Luoa Abstract The birefringence of the yttrium vanadate (YVO4) crystals have been measured for the first time of this material for the MWIR polarization applications. Keywords: yttrium vanadate crystal, birefringence

Dereniak, Eustace L.

88

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

Code of Federal Regulations, 2014 CFR

...2014-07-01 false Phosphoric acid, yttrium(3+) salt (1:1). 721.10177...Substances § 721.10177 Phosphoric acid, yttrium(3+) salt (1:1). (a) Chemical...substance identified as phosphoric acid, yttrium(3+) salt (1:1) (PMN...

2014-07-01

89

Author's personal copy Deposition of yttrium oxide thin films in supercritical carbon dioxide  

E-print Network

Author's personal copy Deposition of yttrium oxide thin films in supercritical carbon dioxide 2007 Available online 4 March 2008 Abstract A synthetic avenue for the formation of yttrium oxide thin,5-heptanedionato) yttrium(III) with inorganic (H2O2) and organic (tert-butyl and di-tert-amyl) peroxides

Gougousi, Theodosia

90

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

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Phosphoric acid, yttrium(3+) salt (1:1). 721.10177...Substances § 721.10177 Phosphoric acid, yttrium(3+) salt (1:1). (a) Chemical...substance identified as phosphoric acid, yttrium(3+) salt (1:1) (PMN...

2013-07-01

91

40 CFR 721.10009 - Manganese yttrium oxide (MnYO3).  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Manganese yttrium oxide (MnYO3). 721.10009 Section...Substances § 721.10009 Manganese yttrium oxide (MnYO3 ). (a) Chemical...chemical substance identified as manganese yttrium oxide (MnYO3 ) (PMN...

2012-07-01

92

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

SciTech Connect

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

Anderson, D.L.

1980-03-01

93

Colonic epithelial response to injury requires Myd88 signaling in myeloid cells  

PubMed Central

Proper colonic injury response requires myeloid-derived cells and Toll-like receptor/Myd88 signaling. However, the precise role of Myd88 signaling specifically in myeloid-derived cells that occurs during tissue damage is unclear. Therefore, we created a mouse line with Myd88 expression restricted to myeloid lineages (Myd88?/?; LysMCre/+; ROSA26Myd88/+; herein Mlcr). In these mice, Myd88 was appropriately expressed and mediated responses to bacterial ligand exposure in targeted cells. Importantly, the severe colonic epithelial phenotype observed in dextran sodium sulfate-injured Myd88?/? mice was rescued by the genetic modification of Mlcr mice. During injury, myeloid cell activation and enrichment of Ptsg2-expressing stromal cells occurred within the mesenchyme that surrounded the crypt bases of Mlcr and Myd88+/? mice but not Myd88?/? mice. Interestingly, these cellular changes to the crypt base mesenchyme also occurred, but to a lesser extent in uninjured Mlcr mice. These results show that Myd88 expression in myeloid cells was sufficient to rescue intestinal injury responses and surprisingly, these cells appear to require an additional Myd88-dependent signal from a non-myeloid cell type during homeostasis. PMID:22258450

Stappenbeck, Thaddeus S.

2013-01-01

94

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

E-print Network

188 YTTRIUM1 (Data in metric tons of yttrium oxide (Y2O3) content, unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was mined as a constituent of the mineral bastnäsite-earth fluocarbonate mineral, was mined as the primary product. Bastnäsite's yttrium content is very small

95

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

E-print Network

186 YTTRIUM1 (Data in metric tons of yttrium oxide (Y2O3) content, unless otherwise noted) Domestic Production and Use: The rare-earth element yttrium was mined as a constituent of the mineral bastnasite-earth fluocarbonate mineral, was mined as a primary product. Bastnasite's yttrium content is very small and represents

96

Yttrium and rare earth stabilized fast reactor metal fuel  

DOEpatents

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

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

1992-01-01

97

Effect of yttrium on nucleation and growth of zirconium hydrides  

NASA Astrophysics Data System (ADS)

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

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

2015-02-01

98

48 CFR 1352.271-88 - Guarantees.  

Code of Federal Regulations, 2012 CFR

...271-88 Federal Acquisition Regulations System DEPARTMENT OF COMMERCE CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT CLAUSES Text of Provisions and Clauses 1352.271-88 Guarantees. As prescribed in 48 CFR...

2012-10-01

99

48 CFR 1352.271-88 - Guarantees.  

Code of Federal Regulations, 2011 CFR

...271-88 Federal Acquisition Regulations System DEPARTMENT OF COMMERCE CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT CLAUSES Text of Provisions and Clauses 1352.271-88 Guarantees. As prescribed in 48 CFR...

2011-10-01

100

48 CFR 1352.271-88 - Guarantees.  

Code of Federal Regulations, 2014 CFR

...271-88 Federal Acquisition Regulations System DEPARTMENT OF COMMERCE CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT CLAUSES Text of Provisions and Clauses 1352.271-88 Guarantees. As prescribed in 48 CFR...

2014-10-01

101

48 CFR 1352.271-88 - Guarantees.  

Code of Federal Regulations, 2013 CFR

...271-88 Federal Acquisition Regulations System DEPARTMENT OF COMMERCE CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT CLAUSES Text of Provisions and Clauses 1352.271-88 Guarantees. As prescribed in 48 CFR...

2013-10-01

102

48 CFR 1352.271-88 - Guarantees.  

Code of Federal Regulations, 2010 CFR

...271-88 Federal Acquisition Regulations System DEPARTMENT OF COMMERCE CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT CLAUSES Text of Provisions and Clauses 1352.271-88 Guarantees. As prescribed in 48 CFR...

2010-10-01

103

50 CFR 260.88 - Political activity.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Political activity. 260.88 Section 260...Consumption Miscellaneous § 260.88 Political activity. All inspectors and licensed...licenses, to take an active part in political management or in political...

2010-10-01

104

32 CFR 644.88 - Other acquisition.  

Code of Federal Regulations, 2014 CFR

... 2014-07-01 2013-07-01 true Other acquisition. 644.88 Section 644.88 National Defense...CONTINUED) REAL PROPERTY REAL ESTATE HANDBOOK Acquisition Acquisition by Purchase, Donation, and Transfer §...

2014-07-01

105

32 CFR 644.88 - Other acquisition.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Other acquisition. 644.88 Section 644.88 National Defense...CONTINUED) REAL PROPERTY REAL ESTATE HANDBOOK Acquisition Acquisition by Purchase, Donation, and Transfer §...

2013-07-01

106

32 CFR 644.88 - Other acquisition.  

Code of Federal Regulations, 2012 CFR

... 2012-07-01 2011-07-01 true Other acquisition. 644.88 Section 644.88 National Defense...CONTINUED) REAL PROPERTY REAL ESTATE HANDBOOK Acquisition Acquisition by Purchase, Donation, and Transfer §...

2012-07-01

107

STS-88 Day 01 Highlights  

NASA Technical Reports Server (NTRS)

On this first day of the STS-88 mission, the flight crew, Commander Robert D. Cabana, Pilot Frederick W. Sturckow, and Mission Specialists Nancy J. Currie, James H. Newman, Jerry L. Ross, and Sergei Krikalev can be seen performing pre-launch activities such as eating the traditional breakfast, crew suit-up, and the ride out to the launch pad. Also, included are various panoramic views of the shuttle on the pad. The crew is readied in the "white room" for their mission. After the closing of the hatch and arm retraction, launch activities are shown including countdown, engine ignition, launch, and the separation of the Solid Rocket Boosters.

1998-01-01

108

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

E-print Network

We report the first 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 100 MeV 18-O beam on a Au target at the Tandem XTU accelerator facility in Legnaro, Italy. Francium is ionized at the gold-vacuum interface and Fr+ ions are then transported with a 3 keV electrostatic beamline to a cell for neutralization and capture in a magneto-optical trap (MOT). A Rb+ beam is also available, which follows the same path as Fr+ ions. The accelerated ions are focused and implanted in a 25 um thick yttrium foil for neutralization: after diffusion to the surface, they are released as neutrals, since the Y work function is lower than the alkali ionization energies. The time evolution of the MOT and the vapor fluorescence signals a...

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

2008-01-01

109

9 CFR 381.88 - Parasites.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 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...

2011-01-01

110

9 CFR 381.88 - Parasites.  

Code of Federal Regulations, 2014 CFR

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

2014-01-01

111

9 CFR 381.88 - Parasites.  

Code of Federal Regulations, 2012 CFR

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

2012-01-01

112

9 CFR 381.88 - Parasites.  

Code of Federal Regulations, 2013 CFR

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

2013-01-01

113

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

114

Liver abscess following radioembolization with yttrium-90 microspheres.  

PubMed

Radioembolization with yttrium-90 microspheres is an accepted and useful intervention model with minimal invasion in both primary and secondary liver malignancies. Radioembolization may lead to some complications. Liver abscess is a rare complication that can occur several weeks after radioembolization treatment of liver tumor with yttrium-90 microspheres. There are only a few case reports on hepatic liver abscess observed in early term of radioembolization treatment, and our case also constitutes a rare report that may contribute to the possible future improvements in radioembolization field to get more insight into the current understanding of the formation of some deleterious insults such as hepatic abscess. PMID:25234938

Korkmaz, Mehmet; Bozkaya, Halil; Ç?nar, Celal; ?anal, Bekir; Güneyli, Serkan; Par?ldar, Mustafa; Oran, ?smail

2014-12-01

115

Thermochromism in yttrium iron garnet compounds.  

PubMed

Polycrystalline yttrium iron garnet (Y3Fe5O12, hereafter labeled YIG) has been synthesized by solid-state reaction, characterized by X-ray diffraction, Mössbauer spectroscopy, and UV-vis-NIR diffuse reflectance spectroscopy, and its optical properties from room temperature (RT) to 300 °C are discussed. Namely, its greenish color at RT is assigned to an O(2-) ? Fe(3+) ligand-to-metal charge transfer at 2.57 eV coupled with d-d transitions peaking at 1.35 and 2.04 eV. When the temperature is raised, YIG displays a marked thermochromic effect; i.e., the color changes continuously from greenish to brownish, which offers opportunities for potential application as a temperature indicator for everyday uses. The origin of the observed thermochromism is assigned to a gradual red shift of the ligand-to-metal charge transfer with temperature while the positioning in energy of the d-d transitions is almost unaltered. Attempts to achieve more saturated colors via doping (e.g., Al(3+), Ga(3+), Mn(3+), ...) remained unsuccessful except for chromium. Indeed, Y3Fe5O12:Cr samples exhibit at RT the same color than the undoped garnet at 200 °C. The introduction of Cr(3+) ions strongly impacts the color of the Y3Fe5O12 parent either by an inductive effect or, more probably, by a direct effect on the electronic structure of the undoped material with formation of a midgap state. PMID:25382733

Serier-Brault, Hélène; Thibault, Lucile; Legrain, Magalie; Deniard, Philippe; Rocquefelte, Xavier; Leone, Philippe; Perillon, Jean-Luc; Le Bris, Stéphanie; Waku, Jean; Jobic, Stéphane

2014-12-01

116

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

E-print Network

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

117

Molecular dynamics simulations of yttrium-stabilized zirconia  

Microsoft Academic Search

The electric conductivity of yttrium-stabilized zirconia exhibits a maximum as a function of dopant (Y3+) cation concentration in isothermal and isobaric conditions. In order to improve the conductivity of this important solid electrolyte, it is essential to understand the ion transport mechanisms at the molecular level. This was investigated by the molecular dynamics simulations method in the present study. The

Xiaoyun Li; B. Hafskjold

1995-01-01

118

Microstructural investigation of alpha-beta yttrium sialon materials  

Microsoft Academic Search

Three yttrium sialon materials have been manufactured under similar conditions, but with varying amounts of the constituent phases. Scanning and transmission microscopy, electron probe microanalysis and X-ray diffraction have been used to characterize the microstructure. Precipitation of the alpha-sialon phase both increases significantly the hardness at all temperatures investigated and decreases the thermal diffusivity. The sialon particles frequently contained a

C. Chatfield; T. Ekström; M. Mikus

1986-01-01

119

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

E-print Network

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

Nystrom, A

2011-01-01

120

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

E-print Network

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

A. Nystrom; M. Thoennessen

2011-02-11

121

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

PubMed Central

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

2013-01-01

122

Evidence of yttrium silicate inclusions in YSZ-porcelain veneers.  

PubMed

This report introduces the discovery of crystalline defects that can form in the porcelain veneering layer when in contact with yttria-stabilized zirconia (YSZ). The focus was on dental prostheses and understanding the defects that form in the YSZ/porcelain system; however the data reported herein may have broader implications toward the use and stability of YSZ-based ceramics in general. Specimens were cut from fully sintered YSZ plates and veneering porcelain was applied (<1 mm thick) to one surface and fired under manufacturer's recommended protocol. Scanning electron microscopy (SEM) with integrated electron dispersive X-ray (EDAX) was used for microstructural and elemental analysis. EDAX, for chemical analysis and transmission electron diffraction (TED) for structural analysis were both performed in the transmission electron microscope (TEM). Additionally, in order to spatially resolve Y-rich precipitates, micro-CT scans were conducted at varying depths within the porcelain veneer. Local EDAX (SEM) was performed in the regions of visible inclusions and showed significant increases in yttrium concentration. TEM specimens also showed apparent inclusions in the porcelain and selected area electron diffraction was performed on these regions and found the inclusions to be crystalline and identified as either yttrium-silicate (Y2 SiO5 ) or yttrium-disilicate (Y2 Si2 O7 ). Micro-CT data showed that yttrium-silicate precipitates were distributed throughout the thickness of the porcelain veneer. Future studies are needed to determine whether many of the premature failures associated with this materials system may be the result of crystalline flaws that form as a result of high temperature yttrium diffusion near the surfaces of YSZ. PMID:24106151

Stoner, Brian R; Griggs, Jason A; Neidigh, John; Piascik, Jeffrey R

2014-04-01

123

WSR-88D Cell Trends  

NASA Technical Reports Server (NTRS)

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

Wheeler, Mark M.

1998-01-01

124

STS-88 Day 11 Highlights  

NASA Technical Reports Server (NTRS)

On this eleventh day of the STS-88 mission, the flight crew, Commander Robert D. Cabana, Pilot Frederick W. Sturckow, and Mission Specialists Nancy J. Currie, James H. Newman, Jerry L. Ross, and Sergei Krikalev are awakened with the song "Goodnight, Sweetheart, Goodnight". Pilot Rick Sturckow undocks Endeavour from the station and backs the shuttle away to a distance of 450 feet above the station before beginning a nose-forward fly-around. Later Cabana, Sturckow and Ross deploy the SAC-A satellite from Endeavour's payload bay. SAC-A is a small, self-contained, non-recoverable satellite built by the Argentinean National Commission of Space Activities. The cube-shaped, 590-pound satellite will test and characterize the performance of new equipment and technologies that may be used in future scientific or operational missions. The payload includes a differential global positioning system, a magnetometer, silicon solar cells, a charge-coupled device Earth camera and a whale tracker experiment.

1998-01-01

125

38 CFR 4.88 - [Reserved  

Code of Federal Regulations, 2010 CFR

...Pensions, Bonuses, and Veterans' Relief DEPARTMENT OF VETERANS AFFAIRS SCHEDULE FOR RATING DISABILITIES Disability Ratings Infectious Diseases, Immune Disorders and Nutritional Deficiencies § 4.88...

2010-07-01

126

38 CFR 4.88 - [Reserved  

Code of Federal Regulations, 2011 CFR

...Pensions, Bonuses, and Veterans' Relief DEPARTMENT OF VETERANS AFFAIRS SCHEDULE FOR RATING DISABILITIES Disability Ratings Infectious Diseases, Immune Disorders and Nutritional Deficiencies § 4.88...

2011-07-01

127

PLASTICIT DU SESQUIOXYDE D'YTTRIUM (Y2O3) PAR MICRO-INDENTATION  

E-print Network

219 PLASTICIT� DU SESQUIOXYDE D'YTTRIUM (Y2O3) PAR MICRO-INDENTATION R. J. GABORIAUD et M. BOISSON du sesquioxyde d'yttrium, Y2O3, en fonction de la température est réalisée par indentation Vickers Microhardness investigation of the yttrium sesquioxide (Y2O3) against tempera- ture is performed by means

Paris-Sud XI, Université de

128

Microwave properties of Yttrium Vanadate at cryogenic temperatures  

E-print Network

Yttrium Vanadate (YVO4) is a birefringent crystal material used in optical isolators and circulators with potentials for application in cryogenic microwave devices. As microwave properties of the YVO4 are not known, we measured the complex permittivity at the frequency of 25 GHz, using the Hakki-Coleman dielectric resonator technique in the temperature range from 13 K to 80 K. The real part of relative permittivity of YVO4 turned out to be similar to that of Sapphire - one of popular dielectric materials, used at microwave frequencies. The measured loss tangent tang {\\delta} of the YVO4 was of the order of 10^(-6) at cryogenic temperatures. As Yttrium Vanadate (YVO4) is easy to synthesis and machine, it may replace the expensive Sapphire in some microwave applications.

Jacob, Mohan V; Krupka, Jerzy; Ledenyov, Dimitri O; Takeuchi, Seiichi

2012-01-01

129

Magnetic resonance imaging features of pituitary yttrium-90 rod implantation.  

PubMed

Intersellar implantation of yttrium-90 rods was a common treatment for a variety of pituitary tumours in the 1960s and 1970s. The magnetic resonance (MR) imaging features in three patients with implants (two for growth hormone-secreting and one for prolactin-secreting pituitary adenomas) are presented: the implants appeared as low signal cylinders with no image distortion, in contradistinction to CT where the implants generate beam hardening and back projection artefacts. Confident evaluation of the pituitary fossa for residential tumour and sequelae of therapy could be made on MR. It is the imaging technique of choice in the follow-up of patients treated with yttrium-90 implants. PMID:9744588

Jarosz, J M; Malcolm, P N; Cox, T C; Bingham, J B

1998-08-01

130

Yttrium complexes of arsine, arsenide, and arsinidene ligands.  

PubMed

Deprotonation of the yttrium-arsine complex [Cp'3 Y{As(H)2 Mes}] (1) (Cp'=?(5) -C5 H4 Me, Mes=mesityl) by nBuLi produces the ?-arsenide complex [{Cp'2 Y[?-As(H)Mes]}3 ] (2). Deprotonation of the As?H bonds in 2 by nBuLi produces [Li(thf)4 ]2 [{Cp'2 Y(?3 -AsMes)}3 Li], [Li(thf)4 ]2 [3], in which the dianion 3 contains the first example of an arsinidene ligand in rare-earth metal chemistry. The molecular structures of the arsine, arsenide, and arsinidene complexes are described, and the yttrium-arsenic bonding is analyzed by density functional theory. PMID:25655652

Pugh, Thomas; Kerridge, Andrew; Layfield, Richard A

2015-03-27

131

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

132

Nanoscale inhomogeneities in yttrium-barium-copper-oxide (YBCO) superconductors  

Microsoft Academic Search

X-ray diffraction studies at the Advanced Photon Source reveal that nanoscale inhomogeneities, electronic or structural in origin, form in yttrium-barium-copper-oxide (YBa_2Cu_3O_6+x) superconductors and coexist with the superconducting (SC) state. Diffuse scattering from these inhomogeneous superstructures is due to atomic displacements with respect to equilibrium lattice sites (Z. Islam et al. Phys. Rev. B 66, 92501 (2002)), that are characterized by

Zahirul Islam; S. K. Sinha; J. C. Lang; X. Liu; D. Haskel; S. C. Moss; G. Srajer; B. W. Veal; D. Wermeille; D. R. Lee; D. R. Haeffner; U. Welp; P. Wochner

2004-01-01

133

Laser self-doubling in neodymium yttrium aluminum borate  

Microsoft Academic Search

The nonlinear effects of neodymium yttrium aluminum borate Nd(x)Y(1-x)Al3(BO3)4 (NYAB) crystal powder samples with different Nd(3+) mole percentages are reported. The optimum X values for the growth of NYAB crystals with high optical homogeneity has been determined. The performance of laser self-frequency doubling from 1.06-0.53 micron has been realized, for the first time, in a 5 x 3 x 3

Bao-Sheng Lu; Jun Wang; Heng-Fu Pan; Min-Hua Jiang; En-Quan Liu; Xue-yuan Hou

1989-01-01

134

Dynamics of antiferromagnetic vortices in domain wall of yttrium orthoferrite  

Microsoft Academic Search

Summary form only given. Gyroscopic quasi-relativistic dynamics of antiferromagnetic vortices (AFMVs) in the domain wall (DW) of a thin plate of yttrium orthoferrite were investigated by the method of two-fold high-speed photography. The velocities of AFMVs - u were investigated as a function of the DW velocity - v . The u(v) dependence is strongly nonlinear with the maximal value

M. V. Chetkin; Yu. N. Kurbatova; T. B. Shapaeva

2002-01-01

135

Synthesis of yttrium aluminum garnet by the glycothermal method  

Microsoft Academic Search

A stoichiometric mixture of aluminum isopropoxide and yttrium acetate in 1,4-butanediol has been found, upon reaction at 300 C, to yield crystalline YAG of Y3Al5O12 composition with 30-nm average particle size; by contrast, the use of ethylene glycol instead of 1,4-butanediol yielded an amorphous product. The crystalline products were directly produced by the reaction. This synthesis method promises to be

Masashi Inoue; Hiroyuki Otsu; Hiroshi Kominami; Tomoyuki Inui

1991-01-01

136

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

137

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

138

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

139

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

E-print Network

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

140

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

E-print Network

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

141

Yttrium-based therapy for neuroendocrine tumors.  

PubMed

Peptide receptor radionuclide therapy with (90)Y-peptides is generally well tolerated. Acute side effects are usually mild; some are related to the coadministration of amino acids and others to the radiopeptide itself. Chronic and permanent effects on target organs, particularly kidneys and bone marrow, are generally mild if necessary precautions are taken. The potential risk to kidney and red marrow limits the amount of radioactivity that may be administered. However, when tumor masses are irradiated with adequate doses, volume reduction may be observed. (90)Y-octreotide has been the most used radiopeptide in the first 8 to 10 years of experience. PMID:25029936

Bodei, Lisa; Cremonesi, Marta; Paganelli, Giovanni

2014-01-01

142

Yttrium-enriched YBa2Cu3Ox thin films for coated conductors fabricated by pulsed laser deposition  

NASA Astrophysics Data System (ADS)

The effects of excess yttria on the structural and electrical properties of the YBa2Cu3Ox (YBCO) thin films are studied. The films were deposited on (LaAlO3)0.3-(Sr2AlTaO8)0.7 substrates by pulsed laser ablation from targets with different elemental composition. An increase of yttrium content of the target leads to formation of porous films with significantly improved current-carrying capabilities. Structural studies of these films reveal presence of yttria nanoparticles embedded into the YBCO matrix. The highest obtained critical current density in an external magnetic field of 5 T was 2.6 MA/cm2 at 50 K and 9.4 MA/cm2 at 20 K. The fabricated Y-enriched YBCO films remain c-oriented at least up to 600 nm thickness with no significant suppression of the critical current density.

Khoryushin, Alexey V.; Mozhaev, Peter B.; Mozhaeva, Julia E.; Andersen, Niels H.; Grivel, Jean-Claude; Hansen, Jørn Bindslev; Jacobsen, Claus S.

2013-02-01

143

Kinetics of Yttrium-Ligand Complexation Monitored Using Hyperpolarized 89 as a Model for Gadolinium in Contrast Agents  

E-print Network

Kinetics of Yttrium-Ligand Complexation Monitored Using Hyperpolarized 89 Y as a Model . Merritt et al.7 applied dissolution-DNP to yttrium 89 Y (100% natural abundance, I ) 1 /2, ) -1.3163 rad attractive for 89 Y NMR. Yttrium allows one to determine crystal defects in pyrochlores such as Y2Ti2-xSnxO7

144

Exceptionally Active Yttrium-Salen Complexes for the Catalyzed Ring Opening of Epoxides by TMSCN and TMSN3  

E-print Network

Exceptionally Active Yttrium-Salen Complexes for the Catalyzed Ring Opening of Epoxides by TMSCN or alkoxide free yttrium-salen complexes are excellent catalysts for the ring opening of epoxides mediated on the solid-state structure of the catalyst complex, we proposed a novel mechanism in which the yttrium center

RajanBabu, T. V. "Babu"

145

Cathodoluminescence Study of GadoliniumDoped Yttrium Oxide Thin Films Deposited By RadioFrequency Magnetron Sputtering  

E-print Network

Cathodoluminescence Study of Gadolinium­Doped Yttrium Oxide Thin Films Deposited By Radio A multi­layer gadolinium­doped yttrium oxide thin film was deposited in a combinatorial fashion on a Si-particle detection units. Previous work on rare­earth doped yttrium oxide materials have shown emission from the blue

Fitz-Gerald, James M.

146

Spin-resolved photoemission of in situ sputtered iron and iron-yttrium alloys Y. B. Xu and D. Greig  

E-print Network

Spin-resolved photoemission of in situ sputtered iron and iron-yttrium alloys Y. B. Xu and D. Greig be due to a negative moment on the yttrium. S0163-1829 97 03017-8 I. INTRODUCTION Amorphous alloys based on iron and yttrium are particu- larly interesting from a fundamental point of view as a range of Fe

Xu, Yongbing

147

Effects of surface pretreatments on interface structure during formation of ultra-thin yttrium silicate dielectric films on silicon  

E-print Network

1 Effects of surface pretreatments on interface structure during formation of ultra-thin yttrium of ultra-thin films of mixed yttrium, silicon, and oxygen, formed by oxidation of metal on clean and pre-treated silicon. XPS and MEIS analyses indicate that oxidation of yttrium on bare silicon results in a fully

Garfunkel, Eric

148

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

E-print Network

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

Demokritov, S.O.

149

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

E-print Network

Local order and magnetic behavior of amorphous and nanocrystalline yttrium iron garnet produced-doped and undoped yttrium iron garnet Y3Fe5O12 or YIG on nonmagnetic Gd3Ga5O12 substrates were irradiated with swift. In particu- lar, yttrium iron garnet Y3Fe5O12 or YIG was given much attention due to its interesting magnetic

Paris-Sud XI, Université de

150

PHYSICAL REVIEW B 83, 184108 (2011) High-pressure structural study of yttrium monochalcogenides from experiment and theory  

E-print Network

PHYSICAL REVIEW B 83, 184108 (2011) High-pressure structural study of yttrium monochalcogenides experiments using synchrotron radiation are performed on the yttrium monochalcogenides YS, YSe, and YTe up, the yttrium monochalcogenides are predicted to undergo a structural transition. Assuming that the high

Svane, Axel Torstein

151

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

E-print Network

Atomic-scale imaging and the effect of yttrium on the fracture toughness of silicon carbide; Silicon carbide; Yttrium dopants; Fracture toughness 1. Introduction Rare-earth (RE) additives-boundary phase due to the presence of the RE ions [4]. However, with additions of yttrium, which

Ritchie, Robert

152

Atomic Layer Deposition of Y2O3 Thin Films from Yttrium Tris(N,N-diisopropylacetamidinate) and Water  

E-print Network

Atomic Layer Deposition of Y2O3 Thin Films from Yttrium Tris yttrium tris- (N,N-diisopropylacetamidinate), Y(i Pr2amd)3, and water. The precursor was thermally stable for advanced electronic applications in nanoscale devices. Introduction Yttrium oxide (Y2O3) is a very

153

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

E-print Network

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

154

88 Applied Rheology March/April 2002  

E-print Network

88 Applied Rheology March/April 2002 On numerical Simulations of Polymer Extrusion Instabilities attention in the past fifty years in numerous experimental, theoretical, and numerical studies. The main

Georgiou, Georgios

155

7 CFR 905.88 - Personal liability.  

Code of Federal Regulations, 2011 CFR

...AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE ORANGES, GRAPEFRUIT, TANGERINES, AND TANGELOS GROWN IN FLORIDA Order Regulating Handling Miscellaneous Provisions § 905.88...

2011-01-01

156

7 CFR 905.88 - Personal liability.  

Code of Federal Regulations, 2014 CFR

...AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS AND ORDERS; FRUITS, VEGETABLES, NUTS), DEPARTMENT OF AGRICULTURE ORANGES, GRAPEFRUIT, TANGERINES, AND TANGELOS GROWN IN FLORIDA Order Regulating Handling Miscellaneous Provisions § 905.88...

2014-01-01

157

7 CFR 958.88 - Amendments.  

Code of Federal Regulations, 2012 CFR

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

2012-01-01

158

7 CFR 945.88 - Derogation.  

Code of Federal Regulations, 2011 CFR

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

2011-01-01

159

7 CFR 945.88 - Derogation.  

Code of Federal Regulations, 2013 CFR

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

2013-01-01

160

40 CFR 98.88 - Definitions.  

Code of Federal Regulations, 2013 CFR

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

2013-07-01

161

40 CFR 98.88 - Definitions.  

Code of Federal Regulations, 2011 CFR

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

2011-07-01

162

40 CFR 98.88 - Definitions.  

Code of Federal Regulations, 2012 CFR

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

2012-07-01

163

40 CFR 98.88 - Definitions.  

Code of Federal Regulations, 2014 CFR

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

2014-07-01

164

40 CFR 98.88 - Definitions.  

Code of Federal Regulations, 2010 CFR

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

2010-07-01

165

49 CFR 230.88 - Throttles.  

Code of Federal Regulations, 2010 CFR

...ADMINISTRATION, DEPARTMENT 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...

2010-10-01

166

36 CFR 223.88 - Bidding methods.  

Code of Federal Regulations, 2011 CFR

...DISPOSAL OF NATIONAL FOREST SYSTEM TIMBER, SPECIAL FOREST PRODUCTS, AND FOREST BOTANICAL PRODUCTS Timber Sale Contracts Advertisement and Bids § 223.88 Bidding methods. (a) Competitive sales of National Forest timber shall be offered...

2011-07-01

167

36 CFR 223.88 - Bidding methods.  

Code of Federal Regulations, 2012 CFR

...DISPOSAL OF NATIONAL FOREST SYSTEM TIMBER, SPECIAL FOREST PRODUCTS, AND FOREST BOTANICAL PRODUCTS Timber Sale Contracts Advertisement and Bids § 223.88 Bidding methods. (a) Competitive sales of National Forest timber shall be offered...

2012-07-01

168

36 CFR 223.88 - Bidding methods.  

Code of Federal Regulations, 2010 CFR

...FOREST SERVICE, DEPARTMENT OF AGRICULTURE SALE AND DISPOSAL OF NATIONAL FOREST SYSTEM TIMBER Timber Sale Contracts Advertisement and Bids § 223.88 Bidding methods. (a) Competitive sales of National Forest timber shall be offered...

2010-07-01

169

37 CFR 1.88 - [Reserved  

Code of Federal Regulations, 2010 CFR

...TRADEMARK OFFICE, DEPARTMENT OF COMMERCE GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions The Drawings § 1.88 [Reserved] Models, Exhibits, Specimens Authority: Secs. 1.91 to 1.95 also issued under 35...

2010-07-01

170

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

171

The performance characteristics of yttrium oxysulfide—A new red phosphor for color television  

Microsoft Academic Search

A new red phosphor, europium-activated yttrium oxy-sulfide, has a luminous efficiency 40 percent greater than that of yttrium vanadate. The use of this phosphor in the P22 color screen of color television receivers results in gun-current ratios which are close to unity when balancedfor a \\

AUSTIN E. HARDY

1968-01-01

172

The performance characteristics of yttrium oxysulfide—A new red phosphor for color television  

Microsoft Academic Search

This paper reports the performance of a new red phosphor, europium-activated yttrium oxysulfide, which has a luminous efficiency 40% greater than that of yttrium orthovanadate. The use of this phosphor in the P22 color screen of color television receivers results in gun-current ratios which are close to unity when balanced for a \\

A. E. Hardy

1967-01-01

173

Novel Synergistic Agent for Selective Separation of Yttrium from Other Rare Earth Metals  

Microsoft Academic Search

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

Terufumi Miyata; Masahiro Goto; Fumiyuki Nakashio

1995-01-01

174

EXTRACTION AND SEPARATION OF YTTRIUM AND RARE-EARTH ELEMENTS FOUND IN EUXENITE  

Microsoft Academic Search

Studies relative to the separation of yttrium and the individual rare-; earth elements (lanthanons) from mixtures in which they occur was undertaken at ; the Federal Bureau of Mines Albany Metallurgy Research Center and resuited in the ; development of a solvent extraction method by which yttrium can be separated from ; the rare-earth metals. A separation factor of l0.93

Gruzensky

1960-01-01

175

EXTRACTION OF YTTRIUM AND RARE-EARTH ELEMENTS FROM A EUXENITE CARBONATE RESIDUE  

Microsoft Academic Search

Three comparatively simple, efficient, and rapid extraction methods for ; the dissolution of yttrium and rare-earth elements from a euxenite carbonate ; residue have been developed, using dilute sulfuric acid as the solvent. ; Extraction processes have resulted in yields of 98+ % of the total rare-earth ; elements and yttrium contained in the residue and have given preliminary ;

V. E. Shaw; D. J. Bauer; J. M. Gomes

1959-01-01

176

DETERMINATION OF OXYGEN IN YTTRIUM FLUORIDE BY A VACUUM DISTILLATION TECHNIQUE  

Microsoft Academic Search

A conventional vacuum fusion gas analysis unit is used for the ; determination of oxygen in yttrium fluoride. The yttrium fluoride ia distilled ; from the furnace, leaving the less volatile oxygen-containing compounds to be ; reduced by the carbon crucible. Recoveries of oxygen are quantitative when a ; liquid reaction medium is provided for the reduction. The effect of

V. M. Horrigan; V. A. Fassel; J. W. Goetzinger

1960-01-01

177

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

SciTech Connect

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

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

2009-09-15

178

Nonlinear electric field tuning characteristics of yttrium iron garnetlead zirconate titanate microwave resonators  

E-print Network

crystals of barium ferrite that have high uniaxial magnetic anisotropy. Lead zirconium titanate PZT or leadNonlinear electric field tuning characteristics of yttrium iron garnet­lead zirconate titanate in a bilayer of yttrium iron garnet YIG -lead zirconate titanate PZT . The tuning is facilitated

Srinivasan, Gopalan

179

Electronic structure and electron-phonon interaction in hexagonal yttrium by density functional calculations  

NASA Astrophysics Data System (ADS)

To understand the pressure-induced changes in the electronic structure and the electron-phonon interaction in yttrium, we have studied hexagonal-close-packed (hcp) yttrium, stable at ambient pressure, and double hexagonal-close-packed (dhcp) yttrium, stable up to around 44GPa , using density-functional-based methods. Our results show that as one goes from hcp yttrium to dhcp yttrium, there are (i) a substantial charge transfer from s?d with extensive modifications of the d band and a sizable reduction in the density of states at the Fermi energy, (ii) a substantial stiffening of phonon modes with the electron-phonon coupling covering the entire frequency range, and (iii) an increase in the electron-phonon coupling constant ? from 0.55 to 1.24, leading to a change in the superconducting transition temperature Tc from 0.3to15.3K for ?*=0.2 .

Singh, Prabhakar P.

2007-03-01

180

RBS and GAXRD contributions to yttrium implanted extra low carbon steel characterization  

SciTech Connect

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. The aim of this article is to show the contributions of Rutherford back-scattering spectrometry (RBS) and glancing angle X-ray diffraction (GAXRD) to the determination of yttrium depth profiles in the samples. The results obtained by these techniques are compared to those of the other analyses performed in this work to show the existing correlation between composition and structural studies. Their results allow a better understanding of the effect of yttrium implantation in extra low carbon steel before studying their corrosion resistance at high temperature.

Caudron, E.; Buscail, H. [Equipe Locale Univ. Blaise Pascal Clermont-Fd II, Le Puy en Velay (France). Lab. Vellave d`Elaboration et d`Etude des Materiaux] [Equipe Locale Univ. Blaise Pascal Clermont-Fd II, Le Puy en Velay (France). Lab. Vellave d`Elaboration et d`Etude des Materiaux; Jacob, Y.P.; Stroosnijder, M.F. [European Commission, Ispra (Italy). Inst. for Advanced Materials] [European Commission, Ispra (Italy). Inst. for Advanced Materials

1999-02-01

181

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

SciTech Connect

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

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

2013-06-15

182

Cyclotron production and radiochemical purification of (88,89)Zr via ?-particle induced reactions on natural strontium.  

PubMed

The radionuclides (88)Zr and (89)Zr have been produced by cyclotron irradiation of (nat)SrO with 35 MeV ?-particles at a beam current of 15 ?A. The thick source production yield of (89)Zr is ~3.1 MBq ?A(-1) h(-1). A two-step radiochemical purification utilising anion-exchange chromatography in hydrochloric and hydrofluoric acids has been developed to separate (88,89)Zr from the target material, natural strontium, the target substrate, aluminium, and long-lived (88)Y. PMID:24858955

Ivanov, P I; Jerome, S M; Bozhikov, G A; Maslov, O D; Starodub, G Ya; Dmitriev, S N

2014-08-01

183

47 CFR 80.88 - Secrecy of communication.  

Code of Federal Regulations, 2010 CFR

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

2010-10-01

184

47 CFR 80.88 - Secrecy of communication.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Secrecy of communication. 80.88 Section 80.88 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY...Procedures-General § 80.88 Secrecy of communication. The station licensee,...

2011-10-01

185

47 CFR 80.88 - Secrecy of communication.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Secrecy of communication. 80.88 Section 80.88 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY...Procedures-General § 80.88 Secrecy of communication. The station licensee,...

2012-10-01

186

47 CFR 80.88 - Secrecy of communication.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Secrecy of communication. 80.88 Section 80.88 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY...Procedures-General § 80.88 Secrecy of communication. The station licensee,...

2013-10-01

187

28 CFR 8.8 - Advertisement and declaration of forfeiture.  

Code of Federal Regulations, 2010 CFR

...Administration 1 2010-07-01 2010-07-01 false Advertisement and declaration of forfeiture. 8.8 Section 8.8...FBI FORFEITURE AUTHORITY FOR CERTAIN STATUTES § 8.8 Advertisement and declaration of forfeiture. (a) The...

2010-07-01

188

28 CFR 8.8 - Advertisement and declaration of forfeiture.  

Code of Federal Regulations, 2011 CFR

...Administration 1 2011-07-01 2011-07-01 false Advertisement and declaration of forfeiture. 8.8 Section 8.8...FBI FORFEITURE AUTHORITY FOR CERTAIN STATUTES § 8.8 Advertisement and declaration of forfeiture. (a) The...

2011-07-01

189

28 CFR 8.8 - Advertisement and declaration of forfeiture.  

Code of Federal Regulations, 2012 CFR

...Administration 1 2012-07-01 2012-07-01 false Advertisement and declaration of forfeiture. 8.8 Section 8.8...FBI FORFEITURE AUTHORITY FOR CERTAIN STATUTES § 8.8 Advertisement and declaration of forfeiture. (a) The...

2012-07-01

190

28 CFR 115.88 - Data review for corrective action.  

Code of Federal Regulations, 2014 CFR

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

2014-07-01

191

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

192

Damping in yttrium iron garnet nanoscale films capped by platinum.  

PubMed

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

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

2013-09-01

193

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

194

Controlling chaos in a thin circular yttrium iron garnet film  

NASA Astrophysics Data System (ADS)

Ott, Grebogi, and Yorke [Phys. Rev. Lett. 64, 1196 (1990)] proposed that the chaotic oscillations of nonlinear dynamic systems could be stabilized onto periodic orbits by introducing weak perturbations upon an available parameter of the system. In the present work, stabilization and control of chaos are demonstrated for the first time in an rf-pumped magnetostatic-resonance instability experiment on a thin circular yttrium iron garnet film, using open-loop and closed-loop feedback methods to modulate the static magnetic field. Computer simulations using a standard model have yielded qualitative agreement with the experimental results.

Ye, M.; Jones, D. E.; Wigen, P. E.

1993-05-01

195

Characteristics of yttrium oxide laser ceramics with additives  

SciTech Connect

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

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

2013-03-31

196

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

197

Early arterial stasis during resin-based yttrium-90 radioembolization: incidence and preliminary outcomes  

PubMed Central

Objectives This study was conducted to determine the incidence of early stasis in radioembolization using resin yttrium-90 (Y-90) microspheres, to evaluate potential contributing factors, and to review initial imaging outcomes. Methods Patients in whom early stasis occurred were compared with those in whom complete delivery was achieved for tumour type and vascularity, tumour?:?normal liver ratio (T?:?N ratio) at technetium-99m-macroaggregated albumin (Tc-99m-MAA) angiography, previous intra-arterial therapy, and infusion site (left, right or whole liver). Tumour response was evaluated at 3 months and defined according to whether a partial response and stable disease versus progressive disease were demonstrated. Results A total of 71 patients underwent 128 Y-90 infusions in which 26 (20.3%) stasis events occurred. Hypervascular and hypovascular tumours had similar rates of stasis (17.4% versus 27.8%; P = NS). The mean ± standard deviation T?:?N ratio was 3.03 ± 1.54 and 3.66 ± 2.79 in patients with and without stasis, respectively (P = NS). Stasis occurred in 14 of 81 (17.3%) and 12 of 47 (25.5%) infusions following previous intra-arterial therapy and in therapy-naïve territories, respectively (P = NS). Early stasis occurred in 15 of 41 (36.6%) left, 10 of 65 (15.4%) right and one of 22 (4.5%) whole liver infusions (P < 0.001). Rates of partial response and stable disease were similar in the stasis (88.3%) and non-stasis (76.0%) groups (P = NS). Conclusions Early stasis occurred in approximately 20% of infusions with similar incidences in hyper-and hypovascular tumours. Whole-liver therapy reduced the incidence of stasis. Stasis did not appear to affect initial imaging outcomes. PMID:23782387

Piana, Peachy Mae; Bar, Voichita; Doyle, Laura; Anne, Rani; Sato, Takami; Eschelman, David J; McCann, Jeffrey W; Gonsalves, Carin F; Brown, Daniel B

2014-01-01

198

XRD, TEM and thermal analysis of yttrium doped boehmite nanofibres.  

PubMed

Yttrium doped boehmite nanofibres with varying yttrium content have been prepared at low temperatures using hydrothermal treatment in the presence of the surfactant polyethylene oxide (PEO). The resultant nanofibres were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and thermogravimetric analysis. TEM images showed the resulting nanostructures are predominantly nanofibres when Y doping is less than 5%. When the doping was at the 10 or 20% content Y(OH)3 nanorods were formed. The nanorods show similar morphology to GaO(OH) nanorods. The doped boehmite and the subsequent nanofibres were analyzed by thermogravimetric and differential thermogravimetric methods. The boehmite nanofibres produced thermally transform at higher temperatures than boehmite crystals and boehmite platelets. In general two thermal decomposition steps are observed at around 45 and 379 degrees C assigned to dehydration and dehydroxylation. The dehydration step is attributed to interstitial water trapped between the boehmite layers. The dehydroxylation steps in the boehmite samples with doping above 3% are strongly asymmetric and additional peaks are resolved in the thermal analysis patterns. This peak becomes clear in the 10 and 20% Y doped boehmite samples and is attributed to the thermal decomposition of the Y(OH)3 nanorods. PMID:19452988

Zhao, Yanyan; Frost, Ray L

2009-05-01

199

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

SciTech Connect

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

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

2013-11-15

200

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

E-print Network

182 YTTRIUM1 [Data in metric tons of yttrium oxide (Y2O3) content unless otherwise noted] Domestic-earth oxide mineral concentrate in 2013 was estimated to be 4,000 tons in 2013. Yttrium was estimated of yttrium, in decreasing order, were in phosphors, ceramics, and metallurgy. Yttrium was used in phosphor

201

Nanomechanical and optical properties of yttrium thin films by magnetron sputtering.  

PubMed

This Letter reports on nanomechanical and optical properties of yttrium thin films deposited on an Si (100) wafer. Elemental depth profiling by a secondary ion mass spectrometer revealed absence of formation of yttrium hydride, both on the surface and beneath. The optical properties were investigated by spectroscopic ellipsometry, and the refractive indices extracted after suitable modeling were found to be 2.51 at 546 nm. Hardness and elastic modulus of these films were found to be 7 and 142 GPa, respectively. These studies indicate that yttrium thin films are suitable for x-ray mirrors, photocathode emitters in e-beam lithography, electron microscopes, and free-electron lasers. PMID:24875983

Ramaseshan, R; Sundari, S Tripura; Balamurugan, A K; Dash, Sitaram; Tyagi, A K; Sato, Y; Nakayama, T; Suematsu, H

2014-06-01

202

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

203

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

E-print Network

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

Biederman, Irving

204

Analysis of Prognostic Factors After Yttrium-90 Radioembolization of Advanced Hepatocellular Carcinoma  

SciTech Connect

Purpose: To analyze which patient-, tumor-, and treatment-related factors may influence outcome after {sup 90}Y radioembolization ({sup 90}Y-RE) for hepatocellular carcinoma (HCC). Patients and Methods: Seventy-two consecutive patients with advanced HCC treated with {sup 90}Y-RE were studied to detect which factors may have influenced response to treatment and survival. Results: Median overall survival was 13 months (95% confidence interval, 9.6-16.3 months). In univariate analysis, survival was significantly better in patients with one to five lesions (19 vs. 8 months, p = 0.001) and in patients with alpha-fetoprotein <52 UI/mL (24 vs. 11 months, p = 0.002). The variation in target tumor size and the appearance of new lesions were analyzed among 50 patients with measurable tumors. A decrease in target tumor size was observed in most patients, and the intensity of such decrease was not associated with any of the factors under study. Patients who developed new lesions in the treated liver (and also in the nontargeted liver) at month 3 more frequently had more than five nodules, bilobar disease, and alpha-fetoprotein >52 UI/mL, and their survival in the multivariate analysis was significantly worse (hazard ratio, 4.7; 95% confidence interval, 13-1.73) (p = 0.002). Conclusions: Yttrium-90 radioembolization results in control of target lesions in the majority of patients with HCC but does not prevent the development of new lesions. Survival of patients treated with {sup 90}Y-RE seems to depend largely on factors related to the aggressiveness of the disease (number of nodules, levels of alpha-fetoprotein, and presence of microscopic disease).

Inarrairaegui, Mercedes [Liver Unit, Department of Internal Medicine, Clinica Universitaria de Navarrra, Pamplona (Spain); Martinez-Cuesta, Antonio [Department of Interventional Radiology, Clinica Universitaria de Navarrra, Pamplona (Spain); Rodriguez, Macarena [Department of Nuclear Medicine, Clinica Universitaria de Navarrra, Pamplona (Spain); Bilbao, J. Ignacio [Department of Interventional Radiology, Clinica Universitaria de Navarrra, Pamplona (Spain)

2010-08-01

205

Volume 88 Annals Number 3 of the  

E-print Network

Volume 88 Annals Number 3 of the 2001 Missouri Botanical Garden PHYLOGENY AND Grass Phylogeny Working Group2,3 SUBFAMILIAL CLASSIFICATION OF THE GRASSES (POACEAE)' ABSTRACT A large collaborativeefforthas yiel(led a comprehensive study of the phylogenyand a new suhfanilial classification of the grass

Mason-Gamer, Roberta J.

206

Some Intellectual Origins of Charter 88  

Microsoft Academic Search

Charter 88 was not (despite some hostile critics' claims) a movement mainly founded on abstract ideas, nor one specifically of, by or for intellectuals. Yet it had a very diverse set of intellectual roots and influences, drawing on many currents of thought ranging from global developments in democratic political theory, through essays in rethinking the histories of Britishness, to specifically

Stephen Howe

2009-01-01

207

Technical Report CMU/SEI-88-TR-34  

E-print Network

Technical Report CMU/SEI-88-TR-34 ESD-TR-88-035 Mode Change Protocols for Priority Change Protocols for Priority-Driven Preemptive Scheduling Technical Report CMU/SEI-88-TR-34 ESD-TR-88D position. It is published in the interest of scientific and technical information exchange

Ramamritham, Krithi

208

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

NASA Astrophysics Data System (ADS)

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

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

2014-05-01

209

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

PubMed

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

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

2014-12-01

210

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

211

Sorptive separation of yttrium and cerium on a weakly basic anionite  

NASA Astrophysics Data System (ADS)

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

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

2015-01-01

212

Transient Dopant Segregation and Precipitation in Yttrium-doped Alumina Mehmet A. Glgn1*  

E-print Network

) of polycrystalline alumina was quantified previously as a function of the Y-content by different research groups [1Transient Dopant Segregation and Precipitation in Yttrium-doped Alumina Mehmet A. Gülgün1* , Saso

Yanikoglu, Berrin

213

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

SciTech Connect

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

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

2013-11-15

214

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

215

Yttrium-90 Radioembolization of Hepatic Metastases from Colorectal Cancer  

PubMed Central

Liver metastases from colorectal cancer (CRC) result in substantial morbidity and mortality. The primary treatment is systemic chemotherapy, and in selected patients, surgical resection; however, for patients who are not surgical candidates and/or fail systemic chemotherapy, liver-directed therapies are increasingly being utilized. Yttrium-90 (Y-90) microsphere therapy, also known as selective internal radiation therapy (SIRT) or radioembolization, has proven to be effective in terms of extending time to progression of disease and also providing survival benefit. This review focuses on the use of Y-90 microsphere therapy in the treatment of liver metastases from CRC, including a comprehensive review of published clinical trials and prospective studies conducted thus far. We review the methodology, outcomes, and side effects of Y-90 microsphere therapy for metastatic CRC. PMID:25120951

Raval, Mihir; Bande, Dinesh; Pillai, Anil K.; Blaszkowsky, Lawrence S.; Ganguli, Suvranu; Beg, Muhammad S.; Kalva, Sanjeeva P.

2014-01-01

216

Novel light emissive yttrium-based nanoparticles and composites  

NASA Astrophysics Data System (ADS)

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

Hill, Laura Burka

217

Rare Earth Doped Yttrium Aluminum Garnet (YAG) Selective Emitters  

NASA Technical Reports Server (NTRS)

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

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

1999-01-01

218

Structural and dielectric properties of yttrium-substituted hydroxyapatites.  

PubMed

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

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

2015-02-01

219

Ferromagnetic resonance of sputtered yttrium iron garnet nanometer films  

NASA Astrophysics Data System (ADS)

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

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

2014-05-01

220

Ferromagnetic resonance of sputtered yttrium iron garnet nanometer films  

SciTech Connect

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

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

2014-05-07

221

Bridgman growth of large-aperture yttrium calcium oxyborate crystal  

SciTech Connect

Highlights: ? YCOB is a novel non-linear optical crystal possessing good thermal, mechanical and nonlinear optical properties. ? Large size crystal growth is key technology question for YCOB crystal. ? YCOB crystals 3 in. in diameter were grown with modified vertical Bridgman method. ? It is a more effective growth method to obtain large size and high quality YCOB crystal. -- Abstract: Large-aperture yttrium calcium oxyborate YCa{sub 4}O(BO{sub 3}){sub 3} (YCOB) crystals with 3 in. in diameter were grown with modified vertical Bridgman method, and the large crystal plate (63 mm × 68 mm × 20 mm) was harvested for high-average power frequency conversion system. The crack, facet growth and spiral growth can be effectively controlled in the as-grown crystal, and Bridgman method displays more effective in obtain large size and high quality YCOB crystal plate than Czochralski technique.

Wu, Anhua, E-mail: wuanhua@mail.sic.ac.cn [Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China)] [Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China); Jiang, Linwen; Qian, Guoxing; Zheng, Yanqing; Xu, Jun; Shi, Erwei [Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China)] [Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China)

2012-09-15

222

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

223

Nanocrystal formation via yttrium ion implantation into sapphire  

SciTech Connect

Ion implantation has been used to form nanocrystals in the near surface of single crystal {alpha}-Al{sub 2}O{sub 3}. The ion fluence was 5 x 10{sup 16} Y{sup +}/cm{sup 2}, and the implant energies investigated were 100, 150, and 170 keV. The morphology of the implanted region was investigated using transmission electron microscopy, x-ray energy dispersive spectroscopy, Rutherford backscattering spectroscopy and ion channeling. The implantation causes the formation of an amorphous surface layer which contains spherical nanosized crystals with a diameter of {approximately}13 nm. The nanocrystals are randomly oriented and exhibit a face-centered cubic structure with a lattice parameter of {approximately}4.1 A {+-} .02 A. Preliminary chemical analysis shows that these nanocrystals are rich in aluminum and yttrium and poor in oxygen relative to the amorphous matrix.

Hunt, E.M.; Hampikian, J.M. [Georgia Institute of Technology, Atlanta, GA (United States). School of Materials Science and Engineering; Poker, D.B. [Oak Ridge National Lab., TN (United States). Solid State Div.

1995-12-31

224

Improvement in the corrosion-erosion resistance of 304 stainless steel with alloyed yttrium  

Microsoft Academic Search

It has been previously demonstrated that yttrium can improve the resistance of stainless steel to sliding wear in corrosive environment. However, the mechanism responsible for the beneficial effect of yttrium on corrosive wear is not well understood. In this work, the erosion behavior of Y-free and Y-containing 304 stainless steel in a dilute H2SO4 slurry containing silica sand was investigated,

Tiancheng Zhang; D. Y. Li

2001-01-01

225

Quantum design and synthesis of a boron-oxygen-yttrium phase  

Microsoft Academic Search

Ab initio calculations are used to design a crystalline boron-oxygen-yttrium (BOY) phase. The essential constituent is yttrium substituting for oxygen in the boron suboxide structure (BO0.17) with Y\\/B and O\\/B ratios of 0.07. The calculations predict that the BOY phase is 0.36 eV\\/atom more stable than crystalline BO0.17 and experiments confirm the formation of crystalline thin films. The BOY phase

Valeriu Chirita; Ulrich Kreissig; Zsolt Czigány; Jochen M. Schneider; Ulf Helmersson

2003-01-01

226

Fluage haute temperature du sesquioxyde d'yttrium: Y2O3  

Microsoft Academic Search

HIGH-TEXPERATURE CREEP OF YTTRIUM SESQUIOXIDE : Y2O3High-temperature and low-stress creep behaviour of yttrium oxide, Y2O3 has been studied by means of compressive experiments, conducted in air, between 1550 and 1800°C in the stress range 20 to 140 MPa. The creep testing apparatus and its technical limits are described in detail.Experimental results are related to a phenomenological analysis in terms of

R. J. Gaboriaud

1981-01-01

227

Influence of yttrium on the interface valence electron density of thermal barrier coatings  

Microsoft Academic Search

Most of the bonding layers of thermal barrier coatings contain some yttrium to improve the physical consistency of the substrate and the ceramics layer. But the reason of the improvement and the proper yttrium content are not clear. In this paper, the valence electron densities ?hkl and ?u?v?w of the two sides and their difference ??min of the bonding layer\\/ceramic

Zhilin Li; Wei Liu; Yuanqi Wu

2007-01-01

228

Synthesis of nanoscaled yttrium aluminum garnet powder by the co-precipitation method  

Microsoft Academic Search

Pure yttrium aluminum garnet (YAG) phase can be obtained from the reaction of aluminum and yttrium nitrate with ammonia, and calcination of the resulting powder at 900°C. Keeping the pH value constant during the co-precipitation is critical for the control of chemical homogeneity within the particles as well as specific surface area of the particles. The specific surface area of

Hongzhi Wang; Lian Gao; Koichi Niihara

2000-01-01

229

Yttrium oxide transparent ceramics by low-temperature microwave sintering  

SciTech Connect

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

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

2012-12-15

230

Antibacterial and antibiofilm properties of yttrium fluoride nanoparticles  

PubMed Central

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

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

2012-01-01

231

STS-88 crew members and technicians participate in their CEIT in the SSPF  

NASA Technical Reports Server (NTRS)

STS-88 crew members and Boeing Manufacturing Engineer Harry Feinberg enjoy a moment inside Node 1 of the International Space Station (ISS) during the mission's Crew Equipment Interface Test (CEIT) in KSC's Space Station Processing Facility. Discussing the mission are, from left to right, Feinberg, Commander Bob Cabana, Mission Specialist Nancy Currie, and Pilot Rick Sturckow. The CEIT gives astronauts an opportunity to get a hands-on look at the payloads with which they will be working on-orbit. STS-88, the first ISS assembly flight, is targeted for launch in July 1998 aboard Space Shuttle Endeavour.

1997-01-01

232

Digital HREM imaging of yttrium atoms in YB{sub 56} with YB{sub 66} structure  

SciTech Connect

The arrangement of yttrium atoms in YB{sub 56} with YB{sub 66} structure was determined by high-resolution electron microscopy (HREM) using a slow-scan CCD camera. Digital HREM images recorded along the [100], [110], and [111] directions of the YB{sub 56} crystals showed averaged yttrium atom positions in the boron clusters, which were also confirmed by image simulation. Digital HREM images recorded from thin regions (<5 nm) directly showed the local yttrium atom arrangements in the YB{sub 56}. In particular, the Y-hole, which consists of a single yttrium vacancy and a single yttrium atom, was detected in the boron clusters. The calculated images based on the proposed local structure model for yttrium atom arrangements agreed well with the observed images.

Oku, Takeo; Carlsson, A.; Wallenberg, L.R.; Malm, J.O.; Bovin, J.O. [Lund Univ. (Sweden)] [Lund Univ. (Sweden); Higashi, Iwami [Riken, Wako, Saitama (Japan). Inst. of Physical and Chemical Research] [Riken, Wako, Saitama (Japan). Inst. of Physical and Chemical Research; Tanaka, Takaho; Ishizawa, Yoshio [National Inst. for Research in Inorganic Materials, Tsukuba, Ibaraki (Japan)] [National Inst. for Research in Inorganic Materials, Tsukuba, Ibaraki (Japan)

1998-02-01

233

Nuclear Data Sheets for A = 88  

SciTech Connect

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

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

2014-01-15

234

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

2012-05-01

235

Biodistribution of Yttrium-90-Labeled Anti-CD45 Antibody in a Nonhuman Primate Model  

SciTech Connect

Radioimmunotherapy may improve the outcome of hematopoietic cell transplantation for hematologic malignancies by delivering targeted radiation to hematopoietic organs while relatively sparing nontarget organs. We evaluated the organ localization of yttrium-90-labeled anti-CD45 (90Y-anti-CD45) antibody in macaques, a model that had previously predicted iodine-131-labeled anti-CD-45 (131I-anti-CD45) antibody biodistribution in humans. Experimental Design: Twelve Macaca nemestrina primates received anti-CD45 antibody labeled with 1 to 2 mCi of 90Y followed by serial blood sampling and marrow and lymph node biopsies, and necropsy. The content of 90Y per gram of tissue was determined by liquid scintillation spectrometry. Time-activity curves were constructed using average isotope concentrations in each tissue at measured time points to yield the fractional residence time and estimate radiation absorbed doses for each organ per unit of administered activity. The biodistribution of 90Y-anti-CD45 antibody was then compared with that previously obtained with 131I-anti-CD45 antibody in macaques. Results: The spleen received 2,120, marrow 1,060, and lymph nodes 315 cGy/mCi of 90Y injected. The liver and lungs were the nontarget organs receiving the highest radiation absorbed doses (440 and 285 cGy/mCi, respectively). Ytrrium-90-labeled anti-CD45 antibody delivered 2.5- and 3.7-fold more radiation to marrow than to liver and lungs, respectively. The ratios previously observed with 131I-antiCD45 antibody were 2.5-and 2.2-fold more radiation to marrow than to liver and lungs, respectively. Conclusions: This study shows that 90Y-anti-CD45 antibody can deliver relatively selective radiation to hematopoietic tissues, with similar ratios of radiation delivered to target versus nontarget organs, as compared with the 131I immunoconjugate in the same animal model.

Nemecek, Eneida; Hamlin, Donald K.; Fisher, Darrell R.; Krohn, Kenneth A.; Pagel, John M.; Applebaum, F. R.; Press, Oliver W.; Matthews, Dana C.

2005-01-15

236

CALCULS D'NERGIE DE FAUTE D'EMPILEMENT DANS LE SESQUIOXYDE D'YTTRIUM (Y2O3)  

E-print Network

L-177 CALCULS D'�NERGIE DE FAUTE D'EMPILEMENT DANS LE SESQUIOXYDE D'YTTRIUM (Y2O3) M. BOISSON et R théorique de l'énergie des différentes fautes d'empilement pouvant être rencontrées dans le sesquioxyde d'yttrium been performed in the yttrium oxide (Y2O3). A method of pair potential interactions, based on an ionic

Boyer, Edmond

237

Selective liquid chromatographic separation of yttrium from heavier rare earth elements using acetic acid as a novel eluent.  

PubMed

One of the major difficulties in the rare earth elements separation is purification of yttrium from heavy rare earth elements. Thus, an HPLC method using acetic acid as novel eluent was explored for selective separation of yttrium form the heavy rare earth elements. When acetic acid is used as a mobile phase yttrium eluted with the lighter lanthanides. This is contrary to its relative position amongst heavier lanthanides when eluents commonly used for separation of rare earth elements were employed. The shift in elution position of yttrium with acetic acid as eluent may reflect a relatively lower stability constant of the yttrium-AcOH complex (in the same order as for the lighter lanthanides) compared to the corresponding AcOH complexes with heavy lanthanides, enabling selective separation of yttrium from the latter. The method was successfully used for selective separation of yttrium in mixed rare earth sample containing about 80% of yttrium and about 20% of heavy rare earth oxides. Thus, the use of AcOH as eluent is an effective approach for separating and determining the trace amounts of heavy rare earth elements in large amounts of yttrium matrix. Separation was performed on C18 column by running appropriate elution programs. The effluent from the column was monitored with diode array detector at absorbance wavelength of 658nm after post column derivatization with Arsenazo III. PMID:23932372

Kifle, Dejene; Wibetoe, Grethe

2013-09-13

238

Activation of TAK1 by MYD88 L265P drives malignant B-cell Growth in non-Hodgkin lymphoma  

PubMed Central

Massively parallel sequencing analyses have revealed a common mutation within the MYD88 gene (MYD88L265P) occurring at high frequencies in many non-Hodgkin lymphomas (NHLs) including the rare lymphoplasmacytic lymphoma, Waldenström's macroglobulinemia (WM). Using whole-exome sequencing, Sanger sequencing and allele-specific PCR, we validate the initial studies and detect the MYD88L265P mutation in the tumor genome of 97% of WM patients analyzed (n=39). Due to the high frequency of MYD88 mutation in WM and other NHL, and its known effects on malignant B-cell survival, therapeutic targeting of MYD88 signaling pathways may be clinically useful. However, we are lacking a thorough characterization of the role of intermediary signaling proteins on the biology of MYD88L265P-expressing B cells. We report here that MYD88L265P signaling is constitutively active in both WM and diffuse large B-cell lymphoma cells leading to heightened MYD88L265P, IRAK and TRAF6 oligomerization and NF-?B activation. Furthermore, we have identified the signaling protein, TAK1, to be an essential mediator of MYD88L265P-driven signaling, cellular proliferation and cytokine secretion in malignant B cells. Our studies highlight the biological significance of MYD88L265P in NHL and reveal TAK1 inhibition to be a potential therapeutic strategy for the treatment of WM and other diseases characterized by MYD88L265P. PMID:24531446

Ansell, S M; Hodge, L S; Secreto, F J; Manske, M; Braggio, E; Price-Troska, T; Ziesmer, S; Li, Y; Johnson, S H; Hart, S N; Kocher, J-P A; Vasmatzis, G; Chanan-Kahn, A; Gertz, M; Fonseca, R; Dogan, A; Cerhan, J R; Novak, A J

2014-01-01

239

STS-88 Mission Specialist Newman receives M-113 training during TCDT activities  

NASA Technical Reports Server (NTRS)

STS-88 Mission Specialist James H. Newman (right) receives instruction on the operation of an M-113, an armored personnel carrier, as part of emergency egress training from George Hoggard during Terminal Countdown Demonstration Test (TCDT) activities. The TCDT also provides the crew with simulated countdown exercises and opportunities to inspect their mission payloads in the orbiter's payload bay. Mission STS-88 is targeted for launch on Dec. 3, 1998. It is the first U.S. flight for the assembly of the International Space Station and will carry the Unity connecting module. Others in the STS-88 crew are Mission Commander Robert D. Cabana; Pilot Frederick W. 'Rick' Sturckow; and Mission Specialists Nancy J. Currie, Jerry L. Ross, and Sergei Konstantinovich Krikalev, a Russian cosmonaut.

1998-01-01

240

STS-88 Mission Specialist James H. Newman arrives at KSC for TCDT  

NASA Technical Reports Server (NTRS)

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

1998-01-01

241

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

NASA Technical Reports Server (NTRS)

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

1998-01-01

242

Safety and Efficacy of Combined Yttrium 90 Resin Radioembolization with Aflibercept and FOLFIRI in a Patient with Metastatic Colorectal Cancer.  

PubMed

Background. When associated with isolated four or fewer liver foci, metastatic colorectal cancer is amenable to surgical resection. Alternative therapeutic methods for isolated liver metastases include radioembolization with yttrium 90 (Y90) and transarterial chemoembolization (TACE). We present here a case of a patient with two sites of liver metastatic disease from colorectal cancer who underwent Y90 radioembolization combined with aflibercept and FOLFIRI. Case Report. A 56-year-old female with history of bilateral breast cancer and metastatic colon cancer with prior hemicolectomy and 4 previous chemotherapy regimens developed liver metastasis. She was started on aflibercept and FOLFIRI and concurrently underwent two treatments of radioembolization with Y90, initially targeting the largest right lobe tumor, and then a subsequent treatment targeting the smaller left lobe tumor with retreatment of the right lobe tumor. Her liver metastases exhibited partial response on imaging utilizing the modified RECIST criteria. Interestingly, the patient CEA levels decreased after the procedure. Discussion. This is the first reported case of a patient managed with radioembolization with Y90 combined with aflibercept, an anti-VEGF treatment, and FOLFIRI. An ongoing randomized clinical trial aims to define the role of combined targeted therapy and chemotherapy with radioembolization with Y90. PMID:25866690

De Souza, Andre; Daly, Kevin Pelham; Yoo, James; Saif, Muhammad Wasif

2015-01-01

243

Safety and Efficacy of Combined Yttrium 90 Resin Radioembolization with Aflibercept and FOLFIRI in a Patient with Metastatic Colorectal Cancer  

PubMed Central

Background. When associated with isolated four or fewer liver foci, metastatic colorectal cancer is amenable to surgical resection. Alternative therapeutic methods for isolated liver metastases include radioembolization with yttrium 90 (Y90) and transarterial chemoembolization (TACE). We present here a case of a patient with two sites of liver metastatic disease from colorectal cancer who underwent Y90 radioembolization combined with aflibercept and FOLFIRI. Case Report. A 56-year-old female with history of bilateral breast cancer and metastatic colon cancer with prior hemicolectomy and 4 previous chemotherapy regimens developed liver metastasis. She was started on aflibercept and FOLFIRI and concurrently underwent two treatments of radioembolization with Y90, initially targeting the largest right lobe tumor, and then a subsequent treatment targeting the smaller left lobe tumor with retreatment of the right lobe tumor. Her liver metastases exhibited partial response on imaging utilizing the modified RECIST criteria. Interestingly, the patient CEA levels decreased after the procedure. Discussion. This is the first reported case of a patient managed with radioembolization with Y90 combined with aflibercept, an anti-VEGF treatment, and FOLFIRI. An ongoing randomized clinical trial aims to define the role of combined targeted therapy and chemotherapy with radioembolization with Y90.

De Souza, Andre; Saif, Muhammad Wasif

2015-01-01

244

32 CFR 776.88 - Report to licensing authorities.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 false Report to licensing authorities. 776.88 Section 776...Processing Procedures § 776.88 Report to licensing authorities. Upon determination...Federal, State, or local bar or other licensing authority of the covered...

2010-07-01

245

Prospects of the WSR-88D Radar for Cloud Studies  

E-print Network

Sounding of nonprecipitating clouds with the 10-cm wavelength Weather Surveillance Radar-1988 Doppler (WSR-88D) is discussed. Readily available enhancements to signal processing and volume coverage patterns of the WSR-88D allow observations of a...

Melnikov, Valery M.; Zrni?, Dusan S.; Doviak, Richard J.; Chilson, Phillip B.; Mechem, David B.; Kogan, Yefim L.

2011-04-01

246

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

247

28 CFR 115.88 - Data review for corrective action.  

Code of Federal Regulations, 2012 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...

2012-07-01

248

40 CFR 725.88 - Uses of a microorganism.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 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...

2010-07-01

249

The Meteoritical Bulletin, No. 88, 2004 July  

USGS Publications Warehouse

The Meteoritical Bulletin No. 88 lists information for 1610 newly classified meteorites, comprising 753 from Antarctica, 302 from Africa, 505 from Asia (495 of which are from Oman), 40 from North America, 5 from South America, 4 from Europe, and 1 of unknown origin. Information is provided for 9 falls (Alby sur Che??ran, Al Zarnkh, Devgaon, Kamioka, Kendrapara, Maromandia, New Orleans, Sivas, and Villalbeto de la Pen??a). Noteworthy specimens include a eucrite fall (Alby sur Che??ran), 6 martian meteorites, 13 lunar meteorites, and 12 irons including one weighing 3 metric ions (Dronino). ?? Meteoritical Society, 2004.

Russell, S.S.; Folco, L.; Grady, M.M.; Zolensky, M.E.; Jones, R.; Righter, K.; Zipfel, J.; Grossman, J.N.

2004-01-01

250

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

251

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

E-print Network

Linear and nonlinear diffraction of dipolar spin waves in yttrium iron garnet films observed of the observed phenomena. I. INTRODUCTION Magnetostatic spin waves in yttrium iron garnet YIG films provide

Demokritov, S.O.

252

42 CFR 84.88 - Breathing bag test.  

Code of Federal Regulations, 2010 CFR

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

2010-10-01

253

7 CFR 800.88 - Loss of identity.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Loss of identity. 800.88 Section 800.88 Agriculture...and Procedures § 800.88 Loss of identity. (a) Lots. Except as...Board appeal inspection service, the identity of grain in a closed carrier or...

2010-01-01

254

7 CFR 800.88 - Loss of identity.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Loss of identity. 800.88 Section 800.88 Agriculture...and Procedures § 800.88 Loss of identity. (a) Lots. Except as...Board appeal inspection service, the identity of grain in a closed carrier or...

2011-01-01

255

7 CFR 800.88 - Loss of identity.  

Code of Federal Regulations, 2014 CFR

...2014-01-01 2014-01-01 false Loss of identity. 800.88 Section 800.88 Agriculture...and Procedures § 800.88 Loss of identity. (a) Lots. Except as...Board appeal inspection service, the identity of grain in a closed carrier or...

2014-01-01

256

7 CFR 800.88 - Loss of identity.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Loss of identity. 800.88 Section 800.88 Agriculture...and Procedures § 800.88 Loss of identity. (a) Lots. Except as...Board appeal inspection service, the identity of grain in a closed carrier or...

2013-01-01

257

7 CFR 800.88 - Loss of identity.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Loss of identity. 800.88 Section 800.88 Agriculture...and Procedures § 800.88 Loss of identity. (a) Lots. Except as...Board appeal inspection service, the identity of grain in a closed carrier or...

2012-01-01

258

36 CFR 7.88 - Indiana Dunes National Lakeshore.  

Code of Federal Regulations, 2010 CFR

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

2010-07-01

259

36 CFR 7.88 - Indiana Dunes National Lakeshore.  

Code of Federal Regulations, 2014 CFR

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

2014-07-01

260

36 CFR 7.88 - Indiana Dunes National Lakeshore.  

Code of Federal Regulations, 2012 CFR

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

2012-07-01

261

36 CFR 7.88 - Indiana Dunes National Lakeshore.  

Code of Federal Regulations, 2011 CFR

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

2011-07-01

262

36 CFR 7.88 - Indiana Dunes National Lakeshore.  

Code of Federal Regulations, 2013 CFR

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

2013-07-01

263

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 and...V: PILOT RULES § 88.15 Lights on dredge pipelines. Dredge pipelines that are floating or supported on trestles...

2010-07-01

264

33 CFR 88.15 - Lights on dredge pipelines.  

Code of Federal Regulations, 2011 CFR

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

2011-07-01

265

33 CFR 88.15 - Lights on dredge pipelines.  

Code of Federal Regulations, 2013 CFR

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

2013-07-01

266

33 CFR 88.15 - Lights on dredge pipelines.  

Code of Federal Regulations, 2014 CFR

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

2014-07-01

267

33 CFR 88.15 - Lights on dredge pipelines.  

Code of Federal Regulations, 2012 CFR

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

2012-07-01

268

10 CFR 71.88 - Air transport of plutonium.  

Code of Federal Regulations, 2014 CFR

...2014-01-01 false Air transport of plutonium. 71.88 Section 71.88 Energy...Procedures § 71.88 Air transport of plutonium. (a) Notwithstanding the provisions...applicable, the licensee shall assure that plutonium in any form, whether for...

2014-01-01

269

Bacterial Infections in Myd88-Deficient Mice  

PubMed Central

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

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

2014-01-01

270

Bacterial infections in Myd88-deficient mice.  

PubMed

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

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

2014-04-01

271

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

E-print Network

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

272

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

E-print Network

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

273

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

E-print Network

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

274

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

E-print Network

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

275

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

E-print Network

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

276

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

E-print Network

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

277

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

E-print Network

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

278

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

E-print Network

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

279

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

280

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

PubMed

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

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

2015-01-01

281

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

NASA Technical Reports Server (NTRS)

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. (Inventor); Mangels, John A. (Inventor)

1984-01-01

282

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

PubMed Central

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

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

2015-01-01

283

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

NASA Technical Reports Server (NTRS)

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

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

1985-01-01

284

Hydrothermal synthesis and formation mechanism of hexagonal yttrium hydroxide fluoride nanobundles  

SciTech Connect

Graphical abstract: The formation of yttrium hydroxide fluorides nanobundles can be expressed as a precipitation transformation from cubic NaYF{sub 4} to hexagonal NaYF{sub 4} and to hexagonal Y(OH){sub 2.02}F{sub 0.98} owing to ion exchange. - Highlights: • Novel Y(OH){sub 2.02}F{sub 0.98} nanobundles have been successfully prepared by hydrothermal method. • The branched nanobundles composed of numerous oriented-attached nanoparticles has been studied. • The growth mechanism is proposed to be ion exchange and precipitation transformation. - Abstract: This article presents the fabrication of hexagonal yttrium hydroxide fluoride nanobundles via one-pot hydrothermal process, using yttrium nitrate, sodium hydroxide and ammonia fluoride as raw materials to react in propanetriol solvent. The X-ray diffraction pattern clearly reveals that the grown product is pure yttrium hydroxide fluoride, namely Y(OH){sub 2.02}F{sub 0.98}. The morphology and microstructure of the synthesized product is testified to be nanobundles composed of numerous oriented-attached nanoparticles as observed from the field emission scanning electron microscopy (FESEM). The chemical composition was analyzed by the energy dispersive spectrum (EDS), confirming the phase transformation of the products which was clearly consistent with the result of XRD analysis. It is proposed that the growth of yttrium hydroxide fluoride nanobundles be attributed to ion exchange and precipitation transformation.

Tian, Li, E-mail: tianli_cl@163.com [Department of Material Science and Engineering, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201 (China); State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China); Sun, QiLiang; Zhao, RuiNi; He, HuiLin; Xue, JianRong [Department of Material Science and Engineering, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201 (China); Lin, Jun [State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China)

2013-11-15

285

Improved Yttrium and Zirconium Abundances in Metal-Poor Stars  

NASA Astrophysics Data System (ADS)

Abstract We present new abundances of the lighter n-capture elements, Yttrium (Z=39) and Zirconium (Z=40) in the very metal poor, r-process rich stars BD+17 3248 and HD 221170. Very accurate abundances were obtained by use of the new transition probabilities for Y II published by Biémont et al. 2011, and Zr II by Malcheva et al. 2006, and by expanding the number of transitions employed for each element. For example, in BD+17 3248, we find log ???????=-0.03 +/- 0.03 (?????=0.15, from 23 lines) for Y II. As for Zr II, log ??????? = 0.65 +/- 0.03 (????? = 0.1, from 13 lines). The resulting abundance ratio is log ??????? [Y/Zr] = -0.68 +/- 0.05. The results for HD 221170 are in accord with those of BD+17 3248. The quantity of lines used to form the abundance means has increased significantly since the original studies of these stars, resulting in more trustworthy abundances. These observed abundance ratios are in agreement with an r-process-only value predicted from stellar models, but is under-abundant compared to an empirical model derived from direct analyses of meteoritic material. This ambiguity should stimulate further nucleosynthetic analysis to explain this abundance ratio. We would like to extend our gratitude to NSF grant AST-0908978 and the University of Texas Astronomy Department Rex G. Baker, Jr. Endowment for their financial support in this project.

Violante, Renata; Biemont, E.; Cowan, J. J.; Sneden, C.

2012-01-01

286

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

287

RBS and XRD Characterization of Yttrium Iron Garnet Thin Films  

NASA Astrophysics Data System (ADS)

Magnetic materials such as yttrium iron garnet (YIG or Y3Fe5O12) present a great importance for their magneto-optic properties. They are potential materials used for applications in the domain of optical telecommunications for example. In this work, we have investigated YIG thin films deposited on substrates of quartz and GGG (gadolinium gallium garnet or Gd3Ga5O12). Using Rutherford backscattering spectrometry (RBS) we characterized the performed layers (thickness and stoichiometry) in order to correlate the films preparation conditions with the quality of the final material. We determined the optimal energy of the alpha particles beam used for RBS measurements and we fitted the experimental spectra using the SIMNRA simulated code. Our RBS results showed that the films have a stoichiometry close to that of the starting material. In addition, we found that the film thickness is proportional to deposition time but inversely proportional to the substrate temperature. Moreover, using x-ray diffraction (XRD) we determined the annealing effect on the structure of the profile of our thin films.

Mansour, M.; Roumie, M.; Abdel Samad, B.; Basma, H.; Korek, M.

2015-03-01

288

Magnon thermal mean free path in yttrium iron garnet  

NASA Astrophysics Data System (ADS)

The magnetothermal properties of monocrystalline yttrium iron garnet (YIG) are reported. The magnon contribution to both the thermal conductivity and specific heat at low temperatures has been determined by measuring these properties under an applied magnetic field, which allows us to freeze the magnon modes and isolate the phonon contribution relative to the zero-field behavior. These results are interpreted within the framework of a simple kinetic gas model for magnon heat conduction that allows us to estimate the magnon thermal mean free path, i.e., the inelastic scattering length scale for thermally driven bulk magnons. We observe this parameter to reach as high as approximately 100 ?m at 2 K. It tracks the acoustic phonon thermal mean free path closely and decreases rapidly as the temperature is increased. This relatively short length scale suggests that magnon modes at thermal energies in YIG are not solely or directly responsible for coherent macroscale thermal spin transport (e.g., in the spin Seebeck effect) at high temperatures. Instead, these results support a growing consensus that subthermal magnons, i.e., those at energies below about 30 ± 10 K, are important for spin transport in YIG at all temperatures. These results also emphasize that magnon effects should be considered wavelength dependent, and that magnon-magnon interactions may be just as important for thermal spin transport as magnon-phonon scattering. This, in turn, has implications for understanding the characteristic temperature and length scales involved in spin caloritronic phenomena.

Boona, Stephen R.; Heremans, Joseph P.

2014-08-01

289

Trans-arterial hepatic radioembolisation of yttrium-90 microspheres  

PubMed Central

The liver represents a frequent site for metastatic disease, in addition to being a site for primary cancer. Hepatic metastases from certain neoplasms, such as colon, neuroendocrine, melanoma and gastrointestinal stromal tumour have a distinct predilection to metastasize the liver, which in many cases may represent the only or the dominant site of disease. In these circumstances, cytoreduction via surgery or in situ ablative techniques aims to influence the natural history of the disease progression and improve clinical outcomes. Liver directed therapy utilising yttrium-90 microspheres represents a recently introduced in situ multidisciplinary cancer therapy that has caught the attention of many physicians faced with the challenges of treating these complex patients. Although similar to other forms of trans-arterial liver directed therapy, there are discrete differences and potentially fatal treatment consequences unique to this therapy. This objective of this review article is to provide the reader a basis for understanding the therapeutic principles, patient exclusion criteria, pre and post therapy investigations and salient clinical results in the two most commonly treated disease types; metastatic colorectal cancer and hepatocellular cancer. PMID:21614250

Murthy, R; Habbu, A; Salem, R

2006-01-01

290

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

291

Shape evolution in Yttrium and Niobium neutron-rich isotopes  

E-print Network

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 selfconsistent 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 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.

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

2011-03-22

292

Shape evolution in Yttrium and Niobium neutron-rich isotopes  

E-print Network

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 selfconsistent 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 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 is...

Rodriguez-Guzman, R; Robledo, L M

2011-01-01

293

Phase Diagram for Magnon Condensate in Yttrium Iron Garnet Film  

PubMed Central

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

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

2013-01-01

294

Comparison of two yttrium-90 regimens in inflammatory and osteoarthropathies.  

PubMed

Two yttrium-90 (90Y) radiosynovectomy procedures were compared. One procedure, performed at the Royal Perth Rehabilitation Hospital (RPRH) required a shorter immobilisation time than that performed at the Sir Charles Gardiner Hospital (SCGH). There were no significant differences in outcome between the two procedures for the groups with inflammatory and osteoarthropathy. Thirty two patients (45 joints) with inflammatory arthropathy were treated (25 with rheumatoid arthritis, three with psoriatic arthritis, two with ankylosing spondylitis, and two with unspecified inflammatory arthropathy) and 40 patients (58 joints) with osteoarthropathy. A separate assessment of local lymph node spread in patients treated by the RPRH showed a minor spread of 90Y in one of 37 joints assessed. A marked improvement in the patient evaluation scores in the inflammatory arthropathy group at three months persisted at 12 months. Good lasting responses were more common in patients with inflammatory arthropathy with a normal joint or early radiological disease. A marked improvement in the pain and evaluation scores occurred at three months in the group with osteoarthropathy but had disappeared by six months after treatment. PMID:1550415

Will, R; Laing, B; Edelman, J; Lovegrove, F; Surveyor, I

1992-02-01

295

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

E-print Network

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

296

Energy levels of exciton traps in yttrium aluminum garnet single crystals C. R. Varney, D. T. Mackay, A. Pratt, S. M. Reda, and F. A. Selim  

E-print Network

Energy levels of exciton traps in yttrium aluminum garnet single crystals C. R. Varney, D. T of exciton traps in yttrium aluminum garnet single crystals C. R. Varney, D. T. Mackay, A. Pratt, S. M. Reda) Electronic defects and exciton traps were studied in yttrium aluminum garnet (YAG) single crystals

Collins, Gary S.

297

Direct atomic flux measurement of electron-beam evaporated yttrium with a diode-laser-based atomic absorption monitor at 668 nm  

E-print Network

Direct atomic flux measurement of electron-beam evaporated yttrium with a diode-laser-based atomic May 1997 A direct measurement of atomic flux in e-beam evaporated yttrium has been demonstrated den- sity and velocity, and thus the atomic flux in an e-beam evaporated yttrium system with a diode

Fejer, Martin M.

298

doi:10.1016/S0016-7037(03)00495-2 Carbonate Complexation of Yttrium and the Rare Earth Elements in Natural Waters  

E-print Network

doi:10.1016/S0016-7037(03)00495-2 Carbonate Complexation of Yttrium and the Rare Earth Elements June 23, 2003) Abstract--Potentiometric measurements of Yttrium and Rare Earth Element (YREE.36), (Lu, 2.58, 7.29). Copyright © 2004 Elsevier Ltd 1. INTRODUCTION The environmental behavior of Yttrium

Meyers, Steven D.

299

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

E-print Network

Synthesis, Structure, and Molecular Orbital Studies of Yttrium, Erbium, and Lutetium Complexes, Wisconsin 53706 ReceiVed March 23, 1999 Treatment of yttrium metal with bis(pentafluorophenyl)mercury (1 for 120 h afforded tris(3,5-di-tert-butylpyrazolato)bis- (pyridine)yttrium(III) (33%). In an analogous

Schlegel, H. Bernhard

300

Radioembolization with Yttrium-90 microspheres in hepatocellular carcinoma: Role and perspectives  

PubMed Central

Transarterial radioembolization (TARE) is a form of brachytherapy in which intra-arterially injected yttrium-90-loaded microspheres serve as a source for internal radiation purposes. On the average, it produces disease control rates exceeding 80% and it is a consolidated therapy for hepatocellular carcinoma (HCC); however, current data are all based on retrospective series or non-controlled prospective studies since randomized controlled trials comparing it with the other liver-directed therapies for intermediate and locally advanced stage HCC are still underway. The data available show that TARE provides similar or even better survival rates when compared to transarterial chemoembolization (TACE). First-line TARE is best indicated for both intermediate-stage patients (staged according to the barcelona clinic liver cancer staging classification) who have lesions which respond poorly to TACE due to multiple tumors or a large tumor burden, and for locally advanced-stage patients with solitary tumors, and segmental or lobar portal vein tumor thrombosis. In addition, emerging data have suggested the use of TARE in patients who are classified slightly beyond the Milan criteria regarding radical treatment for downstaging purposes. As a second-line treatment, TARE can also be applied in patients progressing to TACE or sorafenib; a large number of phase II/III trials are ongoing with the purpose of evaluating the best association with systemic therapies. Transarterial radioembolization is very well tolerated and has a low rate of complications which are mainly related to unintended non-target tissue irradiation, including the surrounding liver parenchyma. The complications can be additionally reduced by accurate patient selection and a strict pre-treatment evaluation including dosimetry and assessment of the vascular anatomy. Since a correct treatment algorithm for potential TARE candidates is not clear and standardized, this comprehensive review analyzes the best selection criteria for patients who really benefit from TARE and also the new advances of this therapy, which can be a very important weapon against HCC.

Mosconi, Cristina; Cappelli, Alberta; Pettinato, Cinzia; Golfieri, Rita

2015-01-01

301

Cerium and yttrium oxide nanoparticles against lead-induced oxidative stress and apoptosis in rat hippocampus.  

PubMed

Due to numerous industrial applications, lead has caused widespread pollution in the environment; it seems that the central nervous system (CNS) is the main target for lead in the human body. Oxidative stress and programmed cell death in the CNS have been assumed as two mechanisms related to neurotoxicity of lead. Cerium oxide (CeO2) and yttrium oxide (Y2O3) nanoparticles have recently shown antioxidant effects, particularly when used together, through scavenging the amount of reactive oxygen species (ROS) required for cell apoptosis. We looked into the neuroprotective effects of the combinations of these nanoparticles against acute lead-induced neurotoxicity in rat hippocampus. We used five groups in this study: control, lead, CeO2 nanoparticles + lead, Y2O3 nanoparticles + lead, and CeO2 and Y2O3 nanoparticles + lead. Nanoparticles of CeO2 (1000 mg/kg) and Y2O3 (230 mg/kg) were administered intraperitoneally during 2 days prior to intraperitoneal injection of the lead (25 mg/kg for 3 days). At the end of the treatments, oxidative stress markers, antioxidant enzymes activity, and apoptosis indexes were investigated. The results demonstrated that pretreatments with CeO2 and/or Y2O3 nanoparticles recovered lead-caused oxidative stress markers (ROS, lipid peroxidation, and total thiol molecules) and apoptosis indexes (Bax/Bcl-2 and caspase-3 protein expression). Besides, these nanoparticles reduced the activities of lead-induced superoxide dismutase and catalase as well as the ADP/ATP ratio. Interestingly, the best recovery resulted from the compound of these nanoparticles. Based on these outcomes, it appears that this combination may potentially be beneficial for protection against lead-caused acute toxicity in the brain through improving the oxidative stress-mediated programmed cell death pathway. PMID:25516117

Hosseini, Asieh; Sharifi, Ali Mohammad; Abdollahi, Mohammad; Najafi, Rezvan; Baeeri, Maryam; Rayegan, Samira; Cheshmehnour, Jamshid; Hassani, Shokoufeh; Bayrami, Zahra; Safa, Majid

2015-03-01

302

Parallel pumping fine structure at 9.4 Gblz for in-plane magnetized yttrium iron garnet thin films  

E-print Network

Parallel pumping fine structure at 9.4 Gblz for in-plane magnetized yttrium iron garnet thin films at 9.4 GHz on a narrow linewidth in-plane magnetized yttrium iron garnet film with a magnetic layer exchange stiffness parameter Dfr= (6.010.9) x lo-' Oe cm2, which agrees within experimental error

Patton, Carl

303

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

PubMed

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

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

2012-11-01

304

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

PubMed Central

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

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

2012-01-01

305

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

PubMed

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

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

2014-02-01

306

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

NASA Astrophysics Data System (ADS)

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 upon the light wavelength and Bi amount was shown. The main result is the possibility to prepare stable sol-gel solutions containing bismuth, yttrium and iron precursors which lead to garnet phase after annealing at low temperature. These bismuth-doped garnet phases give the expected magneto-optical properties. These processes are promising for the preparation of inexpensive magneto-optical recording media.

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

2000-03-01

307

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

PubMed Central

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

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

2014-01-01

308

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

NASA Astrophysics Data System (ADS)

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

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

2012-02-01

309

Optical bistability in erbium-doped yttrium aluminum garnet crystal combined with a laser diode.  

PubMed

Optical bistability was observed in a simple structure of an injection laser diode combined with an erbium-doped yttrium aluminum garnet crystal. Since a hysteresis characteristic exists in the relationship between the wavelength and the injection current of a laser diode, an optical memory function capable of holding the output status is confirmed. In addition, an optical signal inversion was caused by the decrease of transmission of the erbium-doped yttrium aluminum garnet crystal against the red shift (principally mode hopping) of the laser diode. It is suggested that the switching time of this phenomenon is the time necessary for a mode hopping by current injection. PMID:20862016

Maeda, Y

1994-01-10

310

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)] [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)] [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)] [Department of Physics, University of Texas at Arlington, P.O.Box 19059, Arlington, Texas 76019 (United States)

1997-08-01

311

Low-Temperature Fabrication of Transparent Yttrium Aluminum Garnet (YAG) Ceramics without Additives  

Microsoft Academic Search

A carbonate precursor of yttrium aluminum garnet (YAG) with an approximate composition of NH4AlY0.6(CO3)1.9(OH)2z 0.9H2O was synthesized via a coprecipitation method from a mixed solution of ammonium aluminum sulfate and yttrium nitrate, using ammonium hydrogen carbonate as the precipi- tant. The precursor precipitate was characterized using chem- ical analysis, differential thermal analysis\\/thermogravimetry, X-ray diffractometry, and scanning electron microscopy. The sinterability

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

2004-01-01

312

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

313

Study of lattice dynamics in yttrium doped NdMnO{sub 3} using Raman spectroscopy  

SciTech Connect

A systematic study of Raman spectra on Yttrium doped NdMnO{sub 3} polycrystalline samples was undertaken to understand the lattice dynamics in this compound. Raman active phonons were analyzed and the observed peak were assigned to elucidate various phonon modes in the range (200 - 800) cm{sup ?1}. It was observed that at 325 cm{sup ?1} phonon frequency shifts upward as much as upto 4 % with increase in Yttrium content. Lattice distortions manifest themselves by frequency shifts in both bending and tilt modes of MnO{sub 6} octahedra, resulting in increase of Raman band line-widths.

Yadav, Ruchika, E-mail: ruchika@physics.iisc.ernet.in; Elizabeth, Suja [Physics Department, Indian Institute of Science, Bangalore-560012 (India); Nair, Harikrishnan S. [Physics Department, Indian Institute of Science, Bangalore-560012, India and JCNS/ PGI, JARA-FIT, Forschungszentrum Jülich GmbH52425 Jülich (Germany)

2014-04-24

314

Yttrium oxide\\/silicon dioxide: a new dielectric structure for VLSI\\/ULSI circuits  

Microsoft Academic Search

Electrical characteristics of Al\\/yttrium oxide (~260 Å)\\/silicon dioxide (~40 Å)\\/Si and Al\\/yttrium oxide (~260 Å)\\/Si structures are described. The Al\\/Y2O3\\/SiO2\\/Si (MYOS) and Al\\/Y2 O3\\/Si (MYS) capacitors show very well-behaved I-V characteristics with leakage current density <10-10 A\\/cm2 at 5 V. High-frequency C- V and quasistatic C-V characteristics show very little hysteresis for bias ramp rate ranging from 10 to 100

L. Manchanda; M. Gurvitch

1988-01-01

315

Seltenerdelement-, Yttrium-Gehalte und Bleiisotope in Thermal und Mineralwässern des Schwarzwaldes  

Microsoft Academic Search

Kurzfassung  \\u000a \\u000a Seltenerdelement(SEE)- und Yttrium(Y)-Gehalte sowie Bleiisotopen-Verhltnisse wurden in den potentiellen Aquifergesteinen,\\u000a deren experimentellen Laugungslsungen und den Mineralwssern ermittelt. Fr diese Studie wurden Mineralwsser aus fnf Bohrungen\\u000a im kristallinen Grundgebirge (Granit und Gneis) des Schwarzwaldes ausgewhlt. Die Verteilung der Lanthaniden, des Yttriums\\u000a und der Bleiisotope sind geeignete Mittel, um das Gestein zu erkennen, das den Kationengehalt der Mineralwssern dominant\\u000a prgt. Gneise

Peter Möller; Ingrid Stober; Peter Dulski

1997-01-01

316

Rotated stripe order and its competition with superconductivity in La1.88Sr0.12CuO4  

NASA Astrophysics Data System (ADS)

We report the observation of a bulk charge modulation in La1.88Sr0.12CuO4 (LSCO) with a characteristic in-plane wave vector of (0.236,±?), with ? =0.011 r.l.u. The transverse shift of the ordering wave vector indicates the presence of rotated charge-stripe ordering, demonstrating that the charge ordering is not pinned to the Cu-O bond direction. On cooling through the superconducting transition, we find an abrupt change in the growth of the charge correlations and a suppression of the charge order parameter indicating competition between the two orderings. Orthorhombic LSCO thus helps bridge the apparent disparities between the behavior previously observed in the tetragonal "214" cuprates and the orthorhombic yttrium and bismuth-based cuprates and thus lends strong support to the idea that there is a common motif to charge order in all cuprate families.

Thampy, V.; Dean, M. P. M.; Christensen, N. B.; Steinke, L.; Islam, Z.; Oda, M.; Ido, M.; Momono, N.; Wilkins, S. B.; Hill, J. P.

2014-09-01

317

Spectroscopic constants and potential energy curves of yttrium carbide (YC)  

NASA Astrophysics Data System (ADS)

The potential energy curves of the low-lying electronic states of yttrium carbide (YC) and its cation are calculated at the complete active space self-consistent field and the multireference single and double excitation configuration interaction (MRSDCI) levels of theory. Fifteen low-lying electronic states of YC with different spin and spatial symmetries were identified. The X?-4 state prevails as the ground state of YC, and a low-lying excited A?4 state is found to be 1661cm-1 higher at the MRSDCI level. The computations of the authors support the assignment of the observed spectra to a B?4(? =7/2)?A?4(?=5/2) transition with a reinterpretation that the A?4 state is appreciably populated under the experimental conditions as it is less than 2000cm-1 of the X?-4 ground state, and the previously suggested ?4 ground state is reassigned to the first low-lying excited state of YC. The potential energy curves of YC + confirm a previous prediction by Seivers et al. [J. Chem. Phys. 105, 6322 (1996)] that the ground state of YC+ is formed through a second pathway at higher energies. The calculated ionization energy of YC is 6.00eV, while the adiabatic electron affinity is 0.95eV at the MRSDCI level. The computed ionization energy of YC and dissociation energy of YC+ confirm the revised experimental estimates provided by Seivers et al. although direct experimental measurements yielded results with greater errors due to uncertainty in collisional cross sections for YC+ formation.

Suo, Bingbing; Balasubramanian, Krishnan

2007-06-01

318

Root Cause Analysis of Gastroduodenal Ulceration After Yttrium-90 Radioembolization  

SciTech Connect

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

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

2013-12-15

319

Quantitative bremsstrahlung imaging of yttrium-90 using a Wiener filter  

SciTech Connect

Yttrium-90 ([sup 90]Y), a pure beta emitter, is an attractive radionuclide for radioimmunotherapy of cancer. Therapeutic management requires quantitative imaging to measure the pharmacokinetics of the radionuclide in the patient for radiation dosimetric calculations. The bremsstrahlung emissions can be utilized to acquire an image of beta sources using a gamma camera. Quantitation of [sup 90]Y by bremsstrahlung imaging is difficult because of poor image quality that results from septal penetration and scatter secondary to the broad bremsstrahlung energies. In this work, quantitative methods for bremsstrahlung imaging of [sup 90]Y sources that involved the use of (a) a Wiener filter to deconvolve the septal penetration and scatter while suppressing image noise, and (b) the geometric mean of the conjugate view (GM) and effective point source (EPS) methods to quantify activities were investigated. An abdominal phantom was prepared with [sup 90]Y activities in the liver, spleen, tumors, and background volumes that were similar to those observed in patient studies. A twofold improvement in resolution recovery for full width at tenth maximum of the line spread function at 11 cm depth in water was achieved using Wiener restoration. Definition of the organ and tumor edges was greatly enhanced and cross talk between adjacent sources was suppressed after Wiener restoration. These improvements in image quality led to more accurate estimation of organ and tumor activities. Using the optimum attenuation correction method for GM and EPS quantitation of filtered bremsstrahlung images, estimates of individual activities ([le]17% error) and cumulated activities ([le]8% error) in all of the sources were accurate except for a tumor of 2 cm diameter. The results of this study provide the basis for a method to quantify beta source distribution and demonstrate the potential use of bremsstrahlung imaging in clinical settings.

Shen, S.; DeNardo, G.L.; DeNardo, S.J. (Radiodiagnosis and Therapy, University of California Davis Medical Center, Sacramento, California 95816 (United States))

1994-09-01

320

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

SciTech Connect

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

NONE

1995-10-01

321

Peptoid-ligated pentadecanuclear yttrium and dysprosium hydroxy clusters.  

PubMed

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

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

2015-02-01

322

Anisotropic Optical-Response of Eu-doped Yttrium Orthosilicate  

NASA Technical Reports Server (NTRS)

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

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

1998-01-01

323

Measurement of excitation functions in alpha-induced reactions on yttrium  

NASA Astrophysics Data System (ADS)

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

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

2015-01-01

324

[Thyroid nodule. Study of 88 cases].  

PubMed

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

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

1993-01-01

325

10 CFR 51.88 - Proposals for legislation.  

Code of Federal Regulations, 2010 CFR

...Section 51.88 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) ENVIRONMENTAL PROTECTION REGULATIONS FOR DOMESTIC LICENSING AND RELATED REGULATORY FUNCTIONS National Environmental Policy Act-Regulations...

2010-01-01

326

7 CFR 1214.88 - OMB control numbers.  

Code of Federal Regulations, 2012 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...

2012-01-01

327

7 CFR 1214.88 - OMB control numbers.  

Code of Federal Regulations, 2014 CFR

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

2014-01-01

328

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

329

14 CFR 34.83-34.88 - [Reserved  

Code of Federal Regulations, 2010 CFR

...TRANSPORTATION AIRCRAFT FUEL VENTING AND EXHAUST EMISSION REQUIREMENTS FOR TURBINE ENGINE POWERED AIRPLANES Test Procedures for Engine Smoke Emissions (Aircraft Gas Turbine Engines) §§ 34.83-34.88...

2010-01-01

330

40 CFR 87.83-87.88 - [Reserved  

Code of Federal Regulations, 2012 CFR

...Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) Definitions. Test Procedures for Engine Smoke Emissions (Aircraft Gas Turbine Engines) §§ 87.83-87.88...

2012-07-01

331

Planktic foraminifer census data from Northwind Ridge cores PI-88-AP P3, PI-88-AR P7 and PI-88-AR P9, Arctic Ocean  

USGS Publications Warehouse

The U.S. Geological Survey recovered 9 piston cores from the Northwind Ridge in the Canada Basin of the Arctic Ocean from a cruise of the USCGC Polar Star during 1988. Preliminary analysis of the cores suggests sediments deposited on Northwind Ridge preserve a detailed record of glacial and interglacial cycles for the last few hundred-thousand to one million years. This report includes quantitative data on foraminifers and selected sediment size-fraction data in 98 samples from Northwind Ridge core PI-88AR P3, 51 samples from core PI-88-AR P7 and 117 samples from core PI-88-AR P9.

Foley, Kevin M.; Poore, Richard Z.

1993-01-01

332

Partition model for estimating radiation doses from yttrium-90 microspheres in treating hepatic tumours  

Microsoft Academic Search

A uniform distribution of yttrium-90 (90Y) microspheres throughout the entire liver has always been assumed for dose calculation in treating hepatic tumours. A simple mathematical model was formulated which allows estimation of the activities of a therapeutic dose of90Y microspheres partitioned between the lungs, the tumour and the normal liver, and hence the radiation doses to them. The doses to

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

1996-01-01

333

Extraction of thorium(IV), yttrium(III), and lanthanum(III) by mesityl oxide  

Microsoft Academic Search

Extraction of thorium(IV), yttrium(III), and lanthanum(III) by mesityl ; oxide was investigated. The aqueous phases were nitrate solutions with a nitric ; acid concentration varying from 3 to 12N. In all cases, the extraction increased ; with the HNOâ and mesityl oxide concentrations but decreased slightly as ; the initial metal concentration was increased. The largest separation factors ; obtained

E. C. Chen; Herbert Y. Lee

1973-01-01

334

A novel chiral yttrium complex with a tridentate linked amido-indenyl ligand for intramolecular hydroamination.  

PubMed

A new chiral silicon-linked tridentate amido-indenyl ligand was developed from indene and enantiopure 1,2-cyclohexanediamine. Its yttrium complex was synthesized, characterized and applied to efficiently catalyze the intramolecular hydroamination of non-activated olefins with up to 97% ee. PMID:24217495

Chai, Zhuo; Hua, Dezhi; Li, Kui; Chu, Jiang; Yang, Gaosheng

2014-01-01

335

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. The Faraday rotation of thin films

Toufik Boudiar; Beatrice Payet-Gervy; Marie-Francoise Blanc-Mignon; Jean-Jacques Rousseau; Martine Le Berre; H. Joisten; Bruno Canut

2004-01-01

336

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

337

Size-dependent magnetic properties of nanocrystalline yttrium iron garnet powders  

Microsoft Academic Search

Yttrium iron garnet (YIG) powders with particle sizes of 9, 14, 25 and 60 nm have been synthesised and their magnetic properties have been studied as a function of particle size and temperature. The particles with sizes of 9 and 14 nm exhibited superparamagnetism. The blocking temperature (T) decreased with decreasing particle size, whereas the anisotropy constant (K) increased. The

M. Rajendran; S. Deka; P. A. Joy; A. K. Bhattacharya

2006-01-01

338

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

PubMed

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

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

2014-09-01

339

Precipitation reactions in Magnesium-rare earth alloys containing Yttrium, Gadolinium or Dysprosium  

Microsoft Academic Search

Precipitation reactions have been evaluated in three magnesium-rare earth alloys, containing yttrium, gadolinium or dysprosium. Differences have been noted in precipitate morphology, volume fraction and formation kinetics. These features have been combined with phase composition data and related to mechanical properties.

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

2003-01-01

340

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

341

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

342

Scandium and yttrium phosphasalen complexes as initiators for ring-opening polymerization of cyclic esters.  

PubMed

The synthesis and characterization of novel scandium and yttrium phosphasalen complexes is reported, where phosphasalen refers to two different bis(iminophosphorane) derivatives of the more ubiquitous salen ligands. The activity of the complexes as initiators for the ring-opening polymerization of cyclic esters is presented. The scandium complexes are inactive for lactide polymerization but slow and controlled initiators for ?-caprolactone polymerization. The lack of activity toward lactide exhibited by these compounds is probed, and a rare example of single-monomer insertion product, unable to undergo further reactions with lactide, is identified. In contrast, the analogous yttrium phosphasalen complex is a very active initiator for the ring-opening polymerization of rac-lactide (kobs = 1.5 × 10(-3) s(-1) at 1:500 [yttrium initiator]:[rac-lactide], 1 M overall concentration of lactide in THF at 298 K). In addition to being a very fast initiator, the yttrium complex also maintains excellent levels of polymerization control and a high degree of isoselectivity, with the probability of isotactic enchainment being Pi = 0.78 at 298 K. PMID:25691212

Bakewell, Clare; White, Andrew J P; Long, Nicholas J; Williams, Charlotte K

2015-03-01

343

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

NASA Technical Reports Server (NTRS)

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

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

1974-01-01

344

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

NASA Astrophysics Data System (ADS)

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

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

2014-12-01

345

The lanthanides and yttrium in minerals of the apatite group; a review  

USGS Publications Warehouse

More than 1000 analyses have been tabulated of the distribution of the lanthanides and yttrium in minerals of the apatite group, recalculated to atomic percentages. Average compositions have been calculated for apatites from 14 types of rocks. These show a progressive change of composition from apatites of granitic pegmatites, highest in the heavy lanthanides and yttrium, to those from alkalic pegmatites, highest in the light lanthanides and lowest in yttrium. This progression is clearly shown in plots of S (= at % La+Ce+Pr) vs the ratio La/Nd and of S vs the ratio 100Y/(Y+Ln), where Ln is the sum of the lanthanides. Apatites of sedimentary phosphorites occupy a special position, being relatively depleted in Ce and relatively enriched in yttrium and the heavy lanthanides, consequences of deposition from sea water. Apatites associated with iron ores are close in composition to apatites of carbonatites, alkalic ultramafic, and ultramafic rocks, being enriched in the light lanthanides and depleted in the heavy lanthanides. Their compositions do not support the hypothesis of Parak that the Kiruna-type ores are of sedimentary origin. Table 9 and Figures 1-3 show the dependence of lanthanide distribution on the nature of the host rock. Although a given analysis of the lanthanides does not unequivocally permit certain identification of the host rock, it can indicate a choice of highly probable host rocks.

Fleischer, Michael; Altschuler, Z.S.

1982-01-01

346

Syndioselective coordination polymerization of unmasked polar methoxystyrenes using a pyridenylmethylene fluorenyl yttrium precursor.  

PubMed

Unprecedented coordination-insertion polymerizations of polar methoxyl substituted styrene derivatives, in despite of the position of the substituent, have been achieved using a pyridyl methylene fluorenyl yttrium bis(alkyl) precursor with high activity to give polar polystyrenes of high molecular weight and perfect syndiotacticity. PMID:25691115

Liu, Dongtao; Wang, Rong; Wang, Meiyan; Wu, Chunji; Wang, Zichuan; Yao, Changguang; Liu, Bo; Wan, Xinhua; Cui, Dongmei

2015-03-01

347

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

348

Dielectric, Ferroelectric and Thermal Studies of Gel Grown Yttrium Tartrate (YT) Crystals  

Microsoft Academic Search

Yttrium tartrate (YT) single crystals have been grown by gel encapsulation technique. The crystallinity of the grown crystals was confirmed by XRD technique. The dielectric constant, dielectric loss and ac conductivity was measured as a function of frequency in the range 1 kHz to 1 MHz and temperature range of 30°C to 250°C. Dielectric studies shows two transition peaks at

Sanjay Kumar; B. Kaur; P. N. Kotru; K. K. Bamzai

2006-01-01

349

High temperature corrosion coatings on IN 713C study yttrium modified aluminide  

Microsoft Academic Search

The addition of active elements in high temperature materials may improve cor- rosion resistance extensively. In general, the active elements are incorporated in the form of an alloying element either in the bulk or in overlay coatings, as an oxide dispersion, or by ion im- plantation. In this experiment, yttrium was incorporated by an ion plating method either before or

Kyoo Young Kim; Jae Ho Jun; Jae Kee Lee

350

Prediction of yttrium, lanthanum, cerium, and neodymium leaching recovery from apatite concentrate using artificial neural networks  

Microsoft Academic Search

The assay and recovery of rare earth elements (REEs) in the leaching process is being determined using expensive analytical methods: inductively coupled plasma atomic emission spectroscopy (ICP-AES) and inductively coupled plasma mass spectroscopy (ICP-MS). A neural network model to predict the effects of operational variables on the lanthanum, cerium, yttrium, and neodymium recovery in the leaching of apatite concentrate is

E. Jorjani; A. H. Bagherieh; Sh. Mesroghli; S. Chehreh Chelgani

2008-01-01

351

Intrinsic trapping sites in rare-earth and yttrium oxyorthosilicates D. W. Cooke,a)  

E-print Network

Intrinsic trapping sites in rare-earth and yttrium oxyorthosilicates D. W. Cooke,a) B. L. Bennett spectrum observed in undoped LSO is ascribed to transitions of low-level rare-earth impurities. Regardless associated with the configuration of oxygen ions in the vicinity of the host rare-earth ions. The presence

352

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

SciTech Connect

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

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

2007-11-15

353

Why There Are 88 Keys on the Piano: "88 Logic-The Mackay Method for Piano." Volume 1  

ERIC Educational Resources Information Center

Background: After trying to define the reason why the piano ended up with 88 keys, I found patterns to explain ways of playing the piano with an 8:8 ratio which gives purpose to why the piano has 88 keys on it. Purpose: The first purpose is to enable piano teachers and music students to benefit from understanding how to play piano and be…

Mackay, Stephen R.

2005-01-01

354

Molecular mechanisms for the subversion of MyD88 signaling by TcpC from virulent uropathogenic Escherichia coli  

PubMed Central

The Toll/IL-1 receptor (TIR) domains are crucial signaling modules during innate immune responses involving the Toll-like receptors (TLRs) and IL-1 receptor (IL-1R). Myeloid differential factor 88 (MyD88) is a central TIR domain-containing adapter molecule responsible for nearly all TLR-mediated signaling and is targeted by a TIR domain-containing protein C (TcpC) from virulent uropathogenic Escherichia coli, a common human pathogen. The mechanism of such molecular antagonism has remained elusive. We present the crystal structure of the MyD88 TIR domain with distinct loop conformations that underscore the functional specialization of the adapter, receptor, and microbial TIR domains. Our structural analyses shed light on the genetic mutations at these loops as well as the Poc site. We demonstrate that TcpC directly associates with MyD88 and TLR4 through its predicted DD and BB loops to impair the TLR-induced cytokine induction. Furthermore, NMR titration experiments identify the unique CD, DE, and EE loops from MyD88 at the TcpC-interacting surface, suggesting that TcpC specifically engages these MyD88 structural elements for immune suppression. These findings thus provide a molecular basis for the subversion of TLR signaling by the uropathogenic E. coli virulence factor TcpC and furnish a framework for the design of novel therapeutic agents that modulate immune activation. PMID:23569230

Snyder, Greg A.; Cirl, Christine; Jiang, Jiansheng; Chen, Kang; Waldhuber, Anna; Smith, Patrick; Römmler, Franziska; Snyder, Nathaniel; Fresquez, Theresa; Dürr, Susanne; Tjandra, Nico; Miethke, Thomas; Xiao, Tsan Sam

2013-01-01

355

Excited state dynamics of thulium ions in yttrium aluminum garnets  

NASA Technical Reports Server (NTRS)

The processes that take place in the excited states of a trivalent Thulium (Tm) ion in an Yttrium Aluminum Garnet (YAG) crystal, being relevant to the use of this system for laser applications, have been the object of several studies. We have reexamined this system focusing our attention on the dynamics of Tm following its excitation in the H-3(sub 4) level. Under these conditions the system relaxes through a cross-relaxation process. H-3(sub 4) yields F-3(sub 4), H-3(sub 6) yields F-3(sub 4), whose rate depends upon both the concentration of the Tm ion and the temperature of the crystal. The excitation spectrum obtained by monitoring the 1.8 micron emission of Tm (due to the F-3(sub 4) yields H-3(sub 6) transition) indicates an increase in the contribution to this emission from the H-3(sub 4) level relative to the H-3(sub 5) level as the Tm concentration increases; this shows the increased role played by the H-3(sub 4) level in pumping the infrared emission. Correspondingly, the duration of the luminescence originating in the H-3(sub 4) level is shortened as the concentration of Tm increases. The concentration quenching of this lifetime can be fit to a model which assumes that the cross-relaxation is due to a dipole-dipole interaction; from this fit, the intrinsic Tm lifetime in the absence of cross relaxation can be derived. We have used this lifetime to calculate the rate of the cross-relaxation process. We have evaluated this rate as a function of the temperature and found it to be fastest at 77 K. We have also calculated the microscopic interaction parameters for the cross-relaxation process by using two independent experimental features: (1) the time evolution of the emission from the H-3(sub 4) level; and (2) the spectral overlap between the H-3(sub 4) yields F-3(sub 4) emission and the H-3(sub 6) yields F-3(sub 4) absorption. We have also considered the migration of excitation among the Tm ions in the F-3(sub 4) level and calculated the relevant microparameter by the use of the relevant spectral overlap. The data are consistent with the model in which the Tm ions, once excited into the H-3(sub 4) level decay by cross-relaxation to the F-3(sub 4), and then transfer rapidly their energy to other Tm ions.

Armagan, G.; Buoncristiani, A. M.; Dibartolo, B.

1991-01-01

356

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

NASA Technical Reports Server (NTRS)

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

Stecura, S.

1980-01-01

357

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

NASA Technical Reports Server (NTRS)

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

Stecura, S.

1980-01-01

358

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

NASA Technical Reports Server (NTRS)

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

Stecura, S.

1980-01-01

359

Changes in mortality in Pakistan 1960-88.  

PubMed

General trends in Pakistan infant/child mortality, adult mortality, differentials in mortality, and prospects for future declines in mortality are presented. Future mortality declines are desired and recognized by government policy. Paucity of data and quality control issues cloud an accurate presentation of trends. The crude death rate (CDR) has nonetheless declined in 4 decades form 40-50/1000 in 1900 to 10-12/1000 in the late 1970s and early 1980s. The 1984-88 Pakistan Demographic Survey (PDS) reports a CDR of 10.8/1000. Life expectancy is expected to improve. The majority of deaths are infant/child related. Government policy aims to have 1 trained traditional birth attendant/village in order to improve maternal and child care. Although official statistics are in dispute, there is general agreement that infant mortality has declined particularly in neonatal mortality, i.e., infant mortality is now at 56-62/1000 and neonatal mortality 48/1000 in 1988. Data are derived from the Pakistan Fertility Survey (PFS), and Population Labor Force and Migration Survey (PLM) in the 1960-70s, the 1976-79 Population Growth Surveys (PGS), and the 1984-88 PDS. Lower death rates have also occurred among adults. Sex differentials in mortality have reversed, although the sex ratio still favors males; the improvement may be due to better reporting of female mortality. Life expectancy has improved for women, and there are gains over males. The disadvantage at 15-40 years has been eliminated. Differential mortality is expressed geographically, where urban mortality is much lower than in rural areas. There is a relationship between mothers who have some education and lower infant mortality. Labor force participation effects on mortality are dependent on the reasons for work: economic necessity or in pursuance of a career and supplemental income. Findings on the relationship between income or social class and mortality are equivocal. Improvements are dependent on further fertility declines through birth spacing, educational attainment increases, contraceptive use increases, and the declining trend in length of breast feeding. The Population Program needs to achieve its targets of reducing family size norms and greater spacing between children. Improvements in combating communicable disease, including infective and parasitic diseases, are integral to decline in death rates. Better sanitation, particularly in slums, and availability of potable water are government objectives and will contribute to mortality decline. Access and availability of health care are crucial to improvements, particularly in rural areas. PMID:12285306

Sathar, Z A

1991-01-01

360

ISI ReprintSeries ISIIRS-88-210  

E-print Network

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

Robins, Gabriel

361

ISI TechnicalManual ISI/TM-88-197  

E-print Network

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

Robins, Gabriel

362

STS-88 crew members exit O&C for trip to launch pad and practice countdown  

NASA Technical Reports Server (NTRS)

After suiting up for their practice countdown exercise, STS-88 crew members head for the bus outside the Operations and Checkout Building for the trip to Launch Pad 39A. From left they are Mission Specialist Jerry L. Ross, Mission Specialist Sergei Krikalev, who is a Russian cosmonaut, Mission Specialists James H. Newman and Nancy J. Currie, Pilot Frederick W. 'Rick' Sturckow, and Mission Commander Robert D. Cabana. The crew are at KSC to participate in the Terminal Countdown Demonstration Test (TCDT) which includes mission familiarization activities, emergency egress training, and the simulated main engine cut-off exercise. Mission STS-88 is targeted for launch on Dec. 3, 1998. It is the first U.S. flight for the assembly of the International Space Station and will carry the Unity connecting module.

1998-01-01

363

STS-88 Mission Specialist James H. Newman suits up for TCDT  

NASA Technical Reports Server (NTRS)

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

1998-01-01

364

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

NASA Technical Reports Server (NTRS)

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

1998-01-01

365

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

PubMed

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

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

2014-03-01

366

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

367

Analysis of 11 june 2003 mesoscale convective vortex genesis using weather surveillance radar ??88 doppler (wsr-88d)  

E-print Network

. DATA AND METHODOLOGY 2.1 KTLX and KINX WSR-88D Radar Data The following data were used in the analysis of the 11 June 2003 MCV: 1.) Oklahoma City (Twin Lakes) (KTLX) Level II WSR-88D radar data The KTLX radar is located at 35.33? N, 97.28? W...

Reynolds, Amber Elizabeth

2009-05-15

368

Magnetoelectric interactions in bilayers of yttrium iron garnet and lead magnesium niobate-lead titanate: Evidence for strong coupling  

E-print Network

Magnetoelectric interactions in bilayers of yttrium iron garnet and lead magnesium niobate 2005 The nature of low-frequency magnetoelectric ME coupling has been investigated in bilayers on magnetoelectric interactions in polycrystalline, bulk single crystal, and epitaxial ferromagnetic

Srinivasan, Gopalan

369

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

370

Phase control in the synthesis of yttrium oxide nano and micro-particles by flame spray pyrolysis  

E-print Network

(aqueous solution of yttrium nitrate hex hydrate) into the flame. A hydrogen-oxygen diffusion flame was used to realize the high temperature aerosol synthesis. The particles were collected on filters and analyzed using X-Ray Diffraction (XRD...

Mukundan, Mallika

2009-05-15

371

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

NASA Technical Reports Server (NTRS)

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

Stecura, S.

1979-01-01

372

Verification of d-wave pairing symmetry by microwave intermodulation distortion measurements in yttrium barium copper oxide  

E-print Network

We report measurements of the temperature and power dependence of the microwave frequency intermodulation distortion (IMD) in high quality pulsed laser deposition (PLD) Yttrium Barium Copper Oxide (YBCO) on LaAlO3 substrate. ...

Park, Sang-Hoon, Ph. D. Massachusetts Institute of Technology

2004-01-01

373

Intestinal Epithelium-Specific MyD88 Signaling Impacts Host Susceptibility to Infectious Colitis by Promoting Protective Goblet Cell and Antimicrobial Responses  

PubMed Central

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

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

2014-01-01

374

Fig. S1. In vitro characterisation of NS88.2, and the isogenic prp and ska deletion mutants. A. Growth of NS88.2, NS88.2prp and NS88.2ska. B. Western blot analysis of  

E-print Network

1 Fig. S1. In vitro characterisation of NS88.2, and the isogenic prp and ska deletion mutants. A. Growth of NS88.2, NS88.2prp and NS88.2ska. B. Western blot analysis of streptokinase secreted into culture supernatants. An arrow indicates the major immunoreactive band. C. NS88.2, NS88.2prp and NS88.2ska

Nizet, Victor

375

Corrosion Behavior of Mg-6Al-1Zn+XRE Magnesium Alloy with Minor Addition of Yttrium  

NASA Astrophysics Data System (ADS)

The effect of yttrium addition on the microstructure of Mg-6Al-1Zn alloy was investigated by optical microscopy, x-ray diffraction analysis, and scanning electron microscopy. The experimental alloys were prepared by melting high-purity Mg, Al, Zn, and Y, respectively. Melting was carried out in a Inconel 718 crucible under SF6 and ultra pure Ar (99.999%) gas mixture environment using electric arc furnace. The corrosion behavior of Mg-6Al-1Zn+ xYttrium ( x = 0.5, 1.0 and 1.5 wt.% Y) magnesium alloy with different levels of yttrium additions was studied in 3.5 wt.% NaCl solution. Microstructure of yttrium-added alloy shows that higher grainrefinement is obtained in Mg-6Al-1Zn+0.5wt.%Y. Increasing yttrium content reduces the size of ?-grain and alters the distribution of the ?-phase (Mg17Al12) from continuous network morphology to small and dispersive distribution. It forms secondary intermetallic phase Al2Y which has high melting point along the grain boundary. The corrosion resistance of Mg-6Al-1Zn magnesium alloy improved with addition of Yttrium. It was confirmed by the results of electrochemical polarization test. Based on the polarization curves, it is seen that fine precipitates of Al-Y intermetallic phase in Mg-6Al-1Zn alloy decrease the corrosion current density, thereby improving the corrosion resistance of the Mg-6Al-1Zn magnesium alloy.

Manivannan, S.; Babu, S. P. Kumaresh; Sundarrajan, Srinivasan

2015-04-01

376

Corrosion Behavior of Mg-6Al-1Zn+XRE Magnesium Alloy with Minor Addition of Yttrium  

NASA Astrophysics Data System (ADS)

The effect of yttrium addition on the microstructure of Mg-6Al-1Zn alloy was investigated by optical microscopy, x-ray diffraction analysis, and scanning electron microscopy. The experimental alloys were prepared by melting high-purity Mg, Al, Zn, and Y, respectively. Melting was carried out in a Inconel 718 crucible under SF6 and ultra pure Ar (99.999%) gas mixture environment using electric arc furnace. The corrosion behavior of Mg-6Al-1Zn+xYttrium (x = 0.5, 1.0 and 1.5 wt.% Y) magnesium alloy with different levels of yttrium additions was studied in 3.5 wt.% NaCl solution. Microstructure of yttrium-added alloy shows that higher grainrefinement is obtained in Mg-6Al-1Zn+0.5wt.%Y. Increasing yttrium content reduces the size of ?-grain and alters the distribution of the ?-phase (Mg17Al12) from continuous network morphology to small and dispersive distribution. It forms secondary intermetallic phase Al2Y which has high melting point along the grain boundary. The corrosion resistance of Mg-6Al-1Zn magnesium alloy improved with addition of Yttrium. It was confirmed by the results of electrochemical polarization test. Based on the polarization curves, it is seen that fine precipitates of Al-Y intermetallic phase in Mg-6Al-1Zn alloy decrease the corrosion current density, thereby improving the corrosion resistance of the Mg-6Al-1Zn magnesium alloy.

Manivannan, S.; Babu, S. P. Kumaresh; Sundarrajan, Srinivasan

2015-02-01

377

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

378

7 CFR 989.88 - Duration of immunities.  

Code of Federal Regulations, 2011 CFR

...MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE RAISINS PRODUCED FROM GRAPES GROWN IN CALIFORNIA Order Regulating Handling Miscellaneous Provisions § 989.88 Duration of immunities. The...

2011-01-01

379

42 CFR 88.14 - Standard for determining medical necessity.  

Code of Federal Regulations, 2011 CFR

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

2011-10-01

380

42 CFR 88.14 - Standard for determining medical necessity.  

Code of Federal Regulations, 2012 CFR

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

2012-10-01

381

42 CFR 88.14 - Standard for determining medical necessity.  

Code of Federal Regulations, 2013 CFR

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

2013-10-01

382

42 CFR 88.14 - Standard for determining medical necessity.  

Code of Federal Regulations, 2014 CFR

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

2014-10-01

383

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

384

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

385

40 CFR 600.113-88 - Fuel economy calculations.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Fuel economy calculations. 600.113-88 Section...CONTINUED) ENERGY POLICY FUEL ECONOMY AND CARBON-RELATED EXHAUST EMISSIONS OF MOTOR VEHICLES Fuel Economy Regulations for 1978 and Later...

2010-07-01

386

40 CFR 600.113-88 - Fuel economy calculations.  

Code of Federal Regulations, 2011 CFR

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

2011-07-01

387

88. Level 1 looking southwest showing main anchorage beam set ...  

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

88. Level 1 looking southwest showing main anchorage beam set into wall of pedestal, interior of statue base and guy rods. February 1984. - Statue of Liberty, Liberty Island, Manhattan, New York, New York County, NY

388

40 CFR 146.88 - Injection well operating requirements.  

Code of Federal Regulations, 2012 CFR

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

2012-07-01

389

40 CFR 146.88 - Injection well operating requirements.  

Code of Federal Regulations, 2011 CFR

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

2011-07-01

390

40 CFR 146.88 - Injection well operating requirements.  

Code of Federal Regulations, 2013 CFR

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

2013-07-01

391

40 CFR 146.88 - Injection well operating requirements.  

Code of Federal Regulations, 2014 CFR

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

2014-07-01

392

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

Code of Federal Regulations, 2010 CFR

...Miscellaneous § 1230.88 Patents, copyrights, inventions, and publications. Any patents, copyrights, trademarks...or other uses of such patents, copyrights, inventions...publications inure to the benefit of the Board as...

2010-01-01

393

14 CFR 33.88 - Engine overtemperature test.  

Code of Federal Regulations, 2010 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...

2010-01-01

394

40 CFR 87.83-87.88 - [Reserved  

Code of Federal Regulations, 2011 CFR

...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF AIR POLLUTION FROM AIRCRAFT AND AIRCRAFT ENGINES...Procedures for Engine Smoke Emissions (Aircraft Gas Turbine Engines) §§ 87.83-87.88...

2011-07-01

395

40 CFR 87.83-87.88 - [Reserved  

Code of Federal Regulations, 2010 CFR

...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF AIR POLLUTION FROM AIRCRAFT AND AIRCRAFT ENGINES...Procedures for Engine Smoke Emissions (Aircraft Gas Turbine Engines) §§ 87.83-87.88...

2010-07-01

396

14 CFR 33.88 - Engine overtemperature test.  

Code of Federal Regulations, 2012 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...

2012-01-01

397

14 CFR 33.88 - Engine overtemperature test.  

Code of Federal Regulations, 2014 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...

2014-01-01

398

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

399

14 CFR 33.88 - Engine overtemperature test.  

Code of Federal Regulations, 2011 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...

2011-01-01

400

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

401

28 CFR 2.88 - Confidentiality of parole records.  

Code of Federal Regulations, 2011 CFR

...Administration DEPARTMENT OF JUSTICE PAROLE, RELEASE, SUPERVISION AND RECOMMITMENT OF PRISONERS, YOUTH OFFENDERS, AND JUVENILE DELINQUENTS District of Columbia Code: Prisoners and Parolees § 2.88 Confidentiality of parole...

2011-07-01

402

28 CFR 2.88 - Confidentiality of parole records.  

Code of Federal Regulations, 2010 CFR

...Administration DEPARTMENT OF JUSTICE PAROLE, RELEASE, SUPERVISION AND RECOMMITMENT OF PRISONERS, YOUTH OFFENDERS, AND JUVENILE DELINQUENTS District of Columbia Code: Prisoners and Parolees § 2.88 Confidentiality of parole...

2010-07-01

403

28 CFR 2.88 - Confidentiality of parole records.  

Code of Federal Regulations, 2014 CFR

...Administration DEPARTMENT OF JUSTICE PAROLE, RELEASE, SUPERVISION AND RECOMMITMENT OF PRISONERS, YOUTH OFFENDERS, AND JUVENILE DELINQUENTS District of Columbia Code: Prisoners and Parolees § 2.88 Confidentiality of parole...

2014-07-01

404

RAPID COMMUNICATIONS PHYSICAL REVIEW B 88, 201404(R) (2013)  

E-print Network

RAPID COMMUNICATIONS PHYSICAL REVIEW B 88, 201404(R) (2013) Optical metamaterials apply the concept of quasicrystals to metamaterials and experimentally demonstrate metasurfaces with isotropic properties and high resonance strength. By comparing quasicrystalline, periodic, and amorphous

405

40 CFR 282.88 - Pennsylvania State-Administered Program.  

Code of Federal Regulations, 2010 CFR

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

2010-07-01

406

40 CFR 282.88 - Pennsylvania State-Administered Program.  

Code of Federal Regulations, 2014 CFR

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

2014-07-01

407

40 CFR 282.88 - Pennsylvania State-Administered Program.  

Code of Federal Regulations, 2012 CFR

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

2012-07-01

408

40 CFR 282.88 - Pennsylvania State-Administered Program.  

Code of Federal Regulations, 2013 CFR

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

2013-07-01

409

40 CFR 282.88 - Pennsylvania State-Administered Program.  

Code of Federal Regulations, 2011 CFR

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

2011-07-01

410

40 CFR 8.8 - Comprehensive environmental evaluation.  

Code of Federal Regulations, 2014 CFR

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

2014-07-01

411

40 CFR 8.8 - Comprehensive environmental evaluation.  

Code of Federal Regulations, 2011 CFR

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

2011-07-01

412

40 CFR 8.8 - Comprehensive environmental evaluation.  

Code of Federal Regulations, 2013 CFR

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

2013-07-01

413

40 CFR 8.8 - Comprehensive environmental evaluation.  

Code of Federal Regulations, 2010 CFR

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

2010-07-01

414

40 CFR 8.8 - Comprehensive environmental evaluation.  

Code of Federal Regulations, 2012 CFR

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

2012-07-01

415

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

PubMed Central

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

Mysore, Venkataram; Anitha, B; Hosthota, Abhineetha

2013-01-01

416

High-pressure structural study of yttrium monochalcogenides from experiment and theory  

NASA Astrophysics Data System (ADS)

High-pressure powder x-ray diffraction experiments using synchrotron radiation are performed on the yttrium monochalcogenides YS, YSe, and YTe up to a maximum pressure of 23 GPa. The ambient NaCl structure is stable throughout the pressure range covered. The bulk moduli are determined to be 93, 82, and 67 GPa for YS, YSe, and YTe, respectively. First-principles total energy calculations are carried out using the full-potential linear muffin-tin orbital method. The calculated and measured lattice constants and bulk moduli are in good agrement. Under applied pressure, the yttrium monochalcogenides are predicted to undergo a structural transition. Assuming that the high-pressure phase corresponds to the CsCl crystal structure, transition pressures of 53, 36, and 14 GPa are found for YS, YSe, and YTe, respectively.

Vaitheeswaran, G.; Kanchana, V.; Svane, A.; Christensen, N. E.; Olsen, J. Staun; Jørgensen, J.-E.; Gerward, L.

2011-05-01

417

Preparation and characterization of isotopic oxygen-enriched yttrium barium copper oxide  

SciTech Connect

The preparation of labeled superconducting yttrium barium copper oxides from the labeled metal nitrates is described. The materials were characterized by a variety of physical techniques, and their superconducting properties were measured. Trends are seen in the structural parameters of the materials obtained by the nitrate route and also in isotopically enriched materials prepared via gas-phase exchange. These structural changes are accompanied by changes in superconducting properties. The /sup 18/O-enriched yttrium barium copper oxide prepared via the nitrate route has a T/sub c/depressed by 33/degree/K to 59/degree/K, whereas a /sup 17/O sample has a T/sub c/ between the /sup 18/O material and similarly prepared /sup 16/O sample. 15 refs., 1 fig., 3 tabs.

Ott, K.C.; Smith, J.L.

1988-01-01

418

Quantum design and synthesis of a boron-oxygen-yttrium phase  

NASA Astrophysics Data System (ADS)

Ab initio calculations are used to design a crystalline boron-oxygen-yttrium (BOY) phase. The essential constituent is yttrium substituting for oxygen in the boron suboxide structure (BO0.17) with Y/B and O/B ratios of 0.07. The calculations predict that the BOY phase is 0.36 eV/atom more stable than crystalline BO0.17 and experiments confirm the formation of crystalline thin films. The BOY phase was synthesized with reactive rf magnetron sputtering and identified with x-ray and selected area electron diffraction. Films with Y/B ratios ranging from 0.10 to 0.32, as determined via elastic recoil detection analysis, were grown over a wide range of temperatures (300-600 °C) and found to withstand 1000 °C.

Music, Denis; Chirita, Valeriu; Kreissig, Ulrich; Czigány, Zsolt; Schneider, Jochen M.; Helmersson, Ulf

2003-06-01

419

Spectroscopic analysis of proton induced fluorescence from cerium doped yttrium aluminum garnet  

NASA Astrophysics Data System (ADS)

We have determined the effect of proton induced damage on relative scintillation efficiency for yttrium aluminum garnet doped with cerium (YAG:Ce). The YAG:Ce phosphor samples were exposed to a 3 MeV proton beam, and substrate temperature was limited to control heating damage. Real time in situ measurements of the fluorescence spectra permitted observation of the spectral characteristics of scintillator deterioration due to particle induced damage. Fluorescence from YAG:Ce is relatively dim when compared to other rare earth oxysulfide compounds and the light intensity drops rapidly with dose. Spectra from proton irradiated YAG:Ce exhibit a broad fluorescence peak that is much wider than is typical in other yttrium and gadolinium phosphor compounds. The physical processes in YAG:Ce are very different from other bright-line phosphors as shown by the large difference in the observed fluorescence peak width. Light intensity decreases with dose, following the Birks and Black empirical model.

Fisher, J. H.; Hollerman, W. A.; Shelby, G. A.; Holland, L. R.; Jenkins, G. M.

1993-06-01

420

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

NASA Astrophysics Data System (ADS)

Thin film capacitors were fabricated by sputtering TiN-Y doped HfO2-TiN stacks on silicon substrates. Yttrium was incorporated into the HfO2 layers by simultaneously sputtering from Y2O3 and HfO2 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.; Schröder, U.; Müller, S.; Krause, A.; Martin, D.; Singh, A.; Müller, J.; Geidel, M.; Mikolajick, T.

2012-08-01

421

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

SciTech Connect

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

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

2014-04-24

422

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

NASA Astrophysics Data System (ADS)

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

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

2014-05-01

423

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

E-print Network

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

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

2013-01-01

424

Mott insulator-to-metal transition in yttrium-doped CaIrO?.  

PubMed

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

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

2015-02-11

425

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

NASA Technical Reports Server (NTRS)

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

Dibartolo, B.

1988-01-01

426

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

NASA Astrophysics Data System (ADS)

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

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

2015-02-01

427

Synthesis and characterization of photoluminescent cerium-doped yttrium aluminum garnet  

SciTech Connect

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

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

2008-12-01

428

High spin states in the transitional nucleus 88 Mo  

Microsoft Academic Search

The reaction58Ni(36Ar,a q?)88Mo has been studied at 145 MeV beam energy. A detector array consisting of the OSIRIS spectrometer, four charged-particle?E detectors and seven NE213 neutron detectors has been used to meaure the gamma radiation in??- and particle-??-coincidence mode. The level scheme of88Mo has been extended up to 11.6 MeV excitation energy and probable spin 23h; some 70 transitions and

M. Weiszflog; K. P. Lieb; F. Cristancho; C. J. Gross; A. Jungclaus; D. Rudolph; H. Grawe; J. Heese; K.-H. Maier; R. Schubart; J. Eberth; S. Skoda

1992-01-01

429

Unresponsiveness of MyD88Deficient Mice to Endotoxin  

Microsoft Academic Search

MyD88 is a general adaptor protein that plays an important role in the Toll\\/IL-1 receptor family signalings. Recently, Toll-like receptors 2 and 4 (TLR2 and TLR4) have been suggested to be the signaling receptors for lipopolysaccharide (LPS). In this study, we demonstrate that MyD88 knockout mice lack the ability to respond to LPS as measured by shock response, B cell

Taro Kawai; Osamu Adachi; Tomohiko Ogawa; Kiyoshi Takeda; Shizuo Akira

1999-01-01

430

Recording, archiving, and using WSR-88D data  

Microsoft Academic Search

In order to support NEXRAD program requirements, WSR-88D systems have the capability to record data and products at four levels. Of these, level II (base data) and level III (products) will be most commonly available for various applications by a wide range of users. This paper overviews the data-recording capabilities of the WSR-88D system, plans for recording and archiving these

Timothy D. Crum; Ron L. Alberty; Donald W. Burgess

1993-01-01

431

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

Microsoft Academic Search

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

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

1998-01-01

432

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

433

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

434

Electrical Properties of Heavily Doped and Partially Compensated Calcium Germanium Substituted Yttrium Iron Garnet Films  

Microsoft Academic Search

The electrical properties of heavily doped partially compensated calcium germanium substituted yttrium iron garnet (CaGe:YIG) thin film have been investigated for the first time using the following techniques: (1) I-V characteristic measurements, (2) D.C. conductivity measurements, (3) A newly developed double box car transient current spectroscopy, (4) Thermally stimulated current measurements, (5) Thermopower measurements, and (6) Optical absorption spectroscopy. Some

Sui Hua Yuan

1988-01-01

435

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

SciTech Connect

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

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

2012-02-15

436

Cooled and uncooled infrared detectors based on yttrium barium copper oxide  

Microsoft Academic Search

We review performance and physical characteristics of yttrium barium copper oxide (YBCO) compound as an infrared (IR) photodetector. YBCO has been used as the IR detector material in both superconducting (oxygen-rich) and semiconducting (oxygen-depleted) phases. YBCO in its crystalline, Yba2Cu3O6+x phase with x>0.95 is a high-temperature superconducting material with the superconducting transition Tcapproximately equals 90K. The superconducting YBCOIR detectors operate

Roman Sobolewski; Donald P. Butler; Zeynep Celik-Butler

2001-01-01

437

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

438

Hepatic Abscess After Yttrium-90 Radioembolization for Islet-Cell Tumor Hepatic Metastasis  

SciTech Connect

Infectious complications after yttrium-90 (y-90) radioembolization of hepatic tumors are rare. Most reports describe hepatic abscesses as complications of other locoregional therapies, such as transcatheter arterial embolization or chemoembolization. These usually occur in patients with a history of biliary intervention and present several weeks after treatment. We report a case of hepatic abscess formed immediately after y-90 radioembolization of a hepatic metastasis in a patient who had no history of previous biliary instrumentation.

Mascarenhas, Neil B., E-mail: neilmascarenhas1@gmail.co [Northwestern Memorial Hospital, Department of Radiology, Section of Interventional Radiology (United States); Mulcahy, Mary F. [Robert H Lurie Comprehensive Cancer Center, Northwestern Memorial Hospital, Department of Medicine, Division of Hematology and Oncology (United States); Lewandowski, Robert J.; Salem, Riad; Ryu, Robert K., E-mail: rryu@nmff.or [Northwestern Memorial Hospital, Department of Radiology, Section of Interventional Radiology (United States)

2010-06-15

439

Size-dependent magnetic properties of nanocrystalline yttrium iron garnet powders  

Microsoft Academic Search

Yttrium iron garnet (YIG) powders with particle sizes of 9, 14, 25 and\\u000a 60 nm have been synthesised and their magnetic properties have been\\u000a studied as a function of particle size and temperature. The particles\\u000a with sizes of 9 and 14 nm exhibited superparamagnetism. The blocking\\u000a temperature (T-B) decreased with decreasing particle size, whereas the\\u000a anisotropy constant (K) increased. The

M. Rajendran; S. Deka; PA Joy; A. K. Bhattacharya

2006-01-01

440

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

SciTech Connect

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

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

2012-04-15

441

A new cause of renal thrombotic microangiopathy: Yttrium 90-DOTATOC internal radiotherapy  

Microsoft Academic Search

The chelator somatostatin analogue dota-d-phe1-tyr3-octreotide (DOTATOC), which is stably labeled with the ?-emitting radioisotope yttrium 90 (90Y), is used as internal radiotherapy for the treatment of patients with advanced neuroendocrine tumors. We report 5 patients who developed chronic renal failure, caused in 3 patients by biopsy-proven thrombotic microangiopathy (TMA). Twenty-nine patients (14 men, 15 women) with normal renal function before

Solange Moll; Volker Nickeleit; Jan Mueller-Brand; Felix P. Brunner; Helmut R. Maecke; Michael J. Mihatsch

2001-01-01

442

Engineering of the band gap and optical properties of thin films of yttrium hydride  

SciTech Connect

Thin films of oxygen-containing yttrium hydride show photochromic effect at room temperature. In this work, we have studied structural and optical properties of the films deposited at different deposition pressures, discovering the possibility of engineering the optical band gap by variation of the oxygen content. In sum, the transparency of the films and the wavelength range of photons triggering the photochromic effect can be controlled by variation of the deposition pressure.

You, Chang Chuan; Mongstad, Trygve; Maehlen, Jan Petter; Karazhanov, Smagul, E-mail: smagulk@ife.no [Institute for Energy Technology, P.O. Box 40, NO-2027 Kjeller (Norway)

2014-07-21

443

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

444

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

445

Spin wave localization in one-dimensional magnonic microcavity comprising yttrium iron garnet  

SciTech Connect

We demonstrate the localization of magnetostatic surface waves, i.e., spin waves, in a one-dimensional magnonic microcavity substantialized with periodical conductivity modulation. The narrow localized state is observed inside band gaps and is responsible for a sharp transmission peak. The experimental results strongly agree with the theoretical prediction made with the shape magnetic anisotropy of the propagating medium composed of yttrium iron garnet taken into account.

Kanazawa, Naoki; Goto, Taichi, E-mail: goto@ee.tut.ac.jp; Inoue, Mitsuteru [Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibari-Ga-Oka, Tempaku, Toyohashi, Aichi 441-8580 (Japan)

2014-08-28

446

Ionic conductivity of yttrium-doped zirconia and the “composite effect”  

Microsoft Academic Search

The electrical conductivity of monocrystalline (3.0, 9.5, 12.0 and 17.5 mol% yttria) and polycrystalline (9.9 mol% yttria) yttria-doped zirconia samples was studied using impedance spectroscopy in the temperature range of 250–1200 °C. Results show that the bulk ionic conductivity is independent of the PO2 but varies with the amount of yttrium. The highest conductivities are obtained with monocrystalline zirconia samples

M. Filal; C. Petot; M. Mokchah; C. Chateau; J. L. Carpentier

1995-01-01

447

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

NASA Technical Reports Server (NTRS)

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

Hemmati, H.

1987-01-01

448

Thermal behaviour of gel-grown pure and mixed rare earth tartrates of yttrium and samarium  

Microsoft Academic Search

Thermal behaviour of gel-grown pure and mixed rare earth tartrates of yttrium and samarium is investigated using thermogravimetric\\u000a analysis (TGA) and differential scanning calorimetry (DSC). The thermal behaviour suggests that the materials are unstable\\u000a at lower energies and pass through various stages of decomposition, decomposing to respective rare earth oxides which remain\\u000a stable on further heating. It is estimated that

Anima Jain; Sushma Bhat; Sanjay Pandita; M L Kaul; P N Kotru

1997-01-01

449

Improving radiation stability of yttrium ions doped PbWO 4 crystals by stoichiometric tuning  

Microsoft Academic Search

Light yield of some yttrium-doped PbWO4 crystals increased after low dose irradiation, and the radiation hardness was sensitive to annealing temperature. The radiation instability was attributed to interstitial oxygen ions. In this study, the effect of melt stoichiometry on radiation instability was investigated. The results show that an excessive WO3 in the starting materials can significantly improve the radiation stability

Xin Zhang; Jingying Liao; Zhiwen Yin; Xiaojing Wu

2004-01-01

450

Synthesis of yttrium aluminium garnet by the gel entrapment technique using hexamine  

Microsoft Academic Search

A novel technique has been developed for the preparation of yttrium aluminium garnet (YAG), represented by the chemical formula Y3Al5O12, by achieving the homogeneous precipitation of the constituent metal hydroxides from the stoichiometric mixture of the metal nitrate solution by the addition of hexamethylene tetramine solution. Aluminium ions form a gel at pH 4, entrapping all the liquid, followed by

R. V. Kamat; K. T. Pillai; V. N. Vaidya; D. D. Sood

1996-01-01

451

Bulk optical damage thresholds for doped and undoped, crystalline and ceramic yttrium aluminum garnet  

SciTech Connect

We measured the bulk optical damage thresholds of pure and Nd-doped ceramic yttrium aluminum garnet (YAG), and of pure, Nd-doped, Cr-doped, and Yb-doped crystalline YAG. We used 9.9 ns, 1064 nm, single-longitudinal mode, TEM00 pulses, to determine that the breakdown thresholds are deterministic, with multiple-pulse thresholds ranging from 1.1 to 2.2 kJ/cm{sup 2}.

Do, Binh T.; Smith, Arlee V.

2009-06-20

452

Exceptional field theory. III. E8(8)  

NASA Astrophysics Data System (ADS)

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

Hohm, Olaf; Samtleben, Henning

2014-09-01

453

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

454

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

NASA Astrophysics Data System (ADS)

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

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

2014-12-01

455

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

E-print Network

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

T. Kessler; I. D. Moore; Y. Kudryavtsev; K. Perajarvi; A. Popov; P. Ronkanen; T. Sonoda; B. Tordoff; K. D. A. Wendt; J. Aysto

2007-09-26

456

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

E-print Network

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

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

2007-01-01

457

Various X-ray diffraction investigations to study the oxidation mechanism of yttrium implanted chromium at elevate temperatures  

NASA Astrophysics Data System (ADS)

Attention is paid on the role played by yttrium implantation on the isothermal oxidation behaviour of pure chromium at high temperature. Chromium specimens were oxidized in synthetic air at 800, 900 and 1000 ^{circ}C. Many techniques such as Thermogravimetry, Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD) and in situ XRD were used to characterise the oxide scale formed on chromium-implanted specimens. We have shown that the presence of yttrium limits the nitrogen diffusion through the scale into the metallic matrix. Thus the formation of chromium nitrides is reduced and a better scale adherence is observed. Implanted yttrium has a beneficial effect on the chromium oxidation up to 900^{circ}C. We have shown, by in situ XRD, that it is related to the presence of the yttrium mixed oxide YCrO3 in the scale at high temperature. Cette étude porte sur l'oxydation du chrome pur dans l'air synthétique à 800, 900 et 1000 ^{circ}C. Plusieurs techniques, telles que l'analyse thermogravimétrique (ATG), la microscopie électronique à balayage (MEB) et la diffraction des rayons X (DRX) in situ, ont été employées pour caractériser les couches d'oxyde formées sur le chrome implanté à l'yttrium. Nous avons pu montrer que la présence de l'yttrium limite la diffusion de l'azote au travers de la couche d'oxyde et dans la matrice métallique sous-jacente. Ainsi, la formation des nitrures de chrome est plus faible et une meilleure adhérence de la couche d'oxyde est observée. L'yttrium implanté montre un effet bénéfique sur l'oxydation du chrome jusqu'à une temperature de 900^{circ}C. Nous avons pu montrer par diffraction des rayons X in situ que ce phénomène est lié à la présence de l'oxyde mixte YCrO3 dans la couche formée à haute température.

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

2002-07-01

458

JOURNAL DE PHYSIQUE Colloque C6, supplment au n 7, Tome 41, Juillet 1980, page C6-186 A study of dislocations and inclusions in Yttrium Aluminum Garnet crystals  

E-print Network

of dislocations and inclusions in Yttrium Aluminum Garnet crystals with birefringence topography Shu Shiu of dislocations and inclusions in Yttrium Alu- minum Garnet (YAG) single crystals with birefrin- gence topography

Paris-Sud XI, Université de

459

Adjuvant heparanase inhibitor PI-88 therapy for hepatocellular carcinoma recurrence  

PubMed Central

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

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

2014-01-01

460

Sputter target  

DOEpatents

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

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

1980-01-01

461

A shell model study of the high spin states of 88Y  

NASA Astrophysics Data System (ADS)

Experiments were carried out at the Wright Nuclear Structure Laboratory at Yale University using the 21MV ESTU Tandem Van de Graaff accelerator with the purpose of studying 88Y. A beam of 18O impinged at laboratory energies of 60, 65 and 70 MeV on a 600 ?g/cm2 74Ge target with a thick (10mg/cm2) 197Au backing. This experiment was performed with the specific aim of accessing medium spin states of the nucleus of interest. A second experiment was undertaken to populate the nucleus of interest in higher spin states by impinging the same 18O beam on a thin 62 ?g/cm2 76Ge target with a 20 ?g/cm2 carbon backing at a laboratory beam energy of 90 MeV. Gamma rays emitted following the decay of excited states in 88Y and other nuclei populated in the reactions were measured using the YRAST ball detector array, consisting of 10 Compton suppressed HPGe clover detectors. In conjunction with the experimental study presented here, nuclear shell model calculations using a truncated valence space have also been performed in an attempt to describe the single-particle make-up of the states observed. Preliminary results from these experiments and theoretical calculations are presented.

Bunce, M.; Regan, P. H.; Werner, V.; Anagnostatou, V.; Beausang, C. W.; Bowry, M.; Casperson, R. J.; Chen, D.; Cooper, N.; Goddard, P.; Hughes, R. O.; Ilie, G.; Mason, P. J. R.; Pauerstein, B.; Reed, M. W.; Ross, T. J.

2012-09-01

462

Targeting adenovirus  

Microsoft Academic Search

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

T J Wickham

2000-01-01

463

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

E-print Network

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

464

Lanthanum, cerium, praseodymium and yttrium in waters in an upland acidic and acid sensitive environment, mid-Wales Hydrology and Earth System Sciences, 9(6), 645656 (2005) EGU  

E-print Network

Lanthanum, cerium, praseodymium and yttrium in waters in an upland acidic and acid sensitive, praseodymium and yttrium in waters in an upland acidic and acid sensitive environment, mid-Wales Colin Neal@ceh.ac.uk Abstract The less than 0.45mm filterable lanthanum (La), cerium (Ce), praseodymium (Pr) and yttrium (Y

Paris-Sud XI, Université de

465

JOURNAL DE PHYSIQUE Colloque C I, supple'ment au no 2-3, Tome 32, Fe'vrier-Mars 1971,page C 1 -200 AMSOTROPY OF RUTHENIUiM-SUBSTITUTED YTTRIUM-IRON-GARNET  

E-print Network

AMSOTROPY OF RUTHENIUiM-SUBSTITUTED YTTRIUM-IRON-GARNET by P. HANSEN, W. TOLKSDORF Philips the influence of ruthenium on the anisotropy of yttrium iron garnet, single crystals of the composition Y3-,Ca-SUBSTITUTED YTTRIUM-IRON-GARNET C 1 - 201 of the d functions and the spin functions, respectively. The axis

Paris-Sud XI, Université de

466

On the optical properties of undoped and rare-earth-doped yttrium aluminium garnet single This article has been downloaded from IOPscience. Please scroll down to see the full text article.  

E-print Network

On the optical properties of undoped and rare-earth-doped yttrium aluminium garnet single crystals.1088/0022-3727/45/1/015103 On the optical properties of undoped and rare-earth-doped yttrium aluminium garnet single crystals C R Varney, D may appear in colour only in the online journal) 1. Introduction Rare-earth-(RE)-doped yttrium

Collins, Gary S.

467

Model-Based Radiation Dose Correction for Yttrium-90 Microsphere Treatment of Liver Tumors With Central Necrosis  

SciTech Connect

Purpose: The objectives of this study were to model and calculate the absorbed fraction {phi} of energy emitted from yttrium-90 ({sup 90}Y) microsphere treatment of necrotic liver tumors. Methods and Materials: The tumor necrosis model was proposed for the calculation of {phi} over the spherical shell region. Two approaches, the semianalytic method and the probabilistic method, were adopted. In the former method, the range--energy relationship and the sampling of electron paths were applied to calculate the energy deposition within the target region, using the straight-ahead and continuous-slowing-down approximation (CSDA) method. In the latter method, the Monte Carlo PENELOPE code was used to verify results from the first method. Results: The fraction of energy, {phi}, absorbed from {sup 90}Y by 1-cm thickness of tumor shell from microsphere distribution by CSDA with complete beta spectrum was 0.832 {+-} 0.001 and 0.833 {+-} 0.001 for smaller (r{sub T} = 5 cm) and larger (r{sub T} = 10 cm) tumors (where r is the radii of the tumor [T] and necrosis [N]). The fraction absorbed depended mainly on the thickness of the tumor necrosis configuration, rather than on tumor necrosis size. The maximal absorbed fraction {phi} that occurred in tumors without central necrosis for each size of tumor was different: 0.950 {+-} 0.000, and 0.975 {+-} 0.000 for smaller (r{sub T} = 5 cm) and larger (r{sub T} = 10 cm) tumors, respectively (p < 0.0001). Conclusions: The tumor necrosis model was developed for dose calculation of {sup 90}Y microsphere treatment of hepatic tumors with central necrosis. With this model, important information is provided regarding the absorbed fraction applicable to clinical {sup 90}Y microsphere treatment.

Liu, Ching-Sheng [National PET/Cyclotron Center, Taipei Veterans General Hospital, Taipei, Taiwan (China); Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei, Taiwan (China); Lin, Ko-Han [Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei, Taiwan (China); Lee, Rheun-Chuan, E-mail: rclee@vghtpe.gov.tw [Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan (China); Tseng, Hsiou-Shan [Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan (China); Wang, Ling-Wei; Huang, Pin-I; Chao, Liung-Sheau [Cancer Therapy Center, Taipei Veterans General Hospital, Taipei, Taiwan (China); Chang, Cheng-Yen [Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan (China); Yen, Sang-Hue [Cancer Therapy Center, Taipei Veterans General Hospital, Taipei, Taiwan (China); Tung, Chuan-Jong [Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan (China); Wang, Syh-Jen [National PET/Cyclotron Center, Taipei Veterans General Hospital, Taipei, Taiwan (China); Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei, Taiwan (China); Oliver Wong, Ching-yee [Department of Nuclear Medicine and PET/Cyclotron Center, Oakland University William Beaumont School of Medicine Hospital, Royal Oak, Michigan (United States); Liu, Ren-Shyan [National PET/Cyclotron Center, Taipei Veterans General Hospital, Taipei, Taiwan (China); Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei, Taiwan (China)

2011-11-01

468

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

PubMed

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

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

2014-12-01

469

Inhibition of TIR Domain Signaling by TcpC: MyD88-Dependent and Independent Effects on Escherichia coli Virulence  

PubMed Central

Toll-like receptor signaling requires functional Toll/interleukin-1 (IL-1) receptor (TIR) domains to activate innate immunity. By producing TIR homologous proteins, microbes inhibit host response induction and improve their own survival. The TIR homologous protein TcpC was recently identified as a virulence factor in uropathogenic Escherichia coli (E. coli), suppressing innate immunity by binding to MyD88. This study examined how the host MyD88 genotype modifies the in vivo effects of TcpC and whether additional, TIR-domain containing proteins might be targeted by TcpC. In wild type mice (wt), TcpC enhanced bacterial virulence, increased acute mortality, bacterial persistence and tissue damage after infection with E. coli CFT073 (TcpC+), compared to a ?TcpC deletion mutant. These effects were attenuated in Myd88?/? and Tlr4?/? mice. Transcriptomic analysis confirmed that TcpC inhibits MYD88 dependent gene expression in CFT073 infected human uroepithelial cells but in addition the inhibitory effect included targets in the TRIF and IL-6/IL-1 signaling pathways, where MYD88 dependent and independent signaling may converge. The effects of TcpC on bacterial persistence were attenuated in Trif ?/? or Il-1? ?/? mice and innate immune responses to ?TcpC were increased, confirming that Trif and Il-1? dependent targets might be involved in vivo, in addition to Myd88. Furthermore, soluble TcpC inhibited Myd88 and Trif dependent TLR signaling in murine macrophages. Our results suggest that TcpC may promote UTI-associated pathology broadly, through inhibition of TIR domain signaling and downstream pathways. Dysregulation of the host response by microbial TcpC thus appears to impair the protective effects of innate immunity, while promoting inflammation and tissue damage. PMID:20886104

Yadav, Manisha; Zhang, Jingyao; Fischer, Hans; Huang, Wen; Lutay, Nataliya; Cirl, Christine; Lum, Josephine; Miethke, Thomas; Svanborg, Catharina

2010-01-01

470

Hep88 mAb-initiated paraptosis-like PCD pathway in hepatocellular carcinoma cell line through the binding of mortalin (HSPA9) and alpha-enolase  

PubMed Central

Background Hepatocellular carcinoma (HCC) is the most prevalent hepatic cancer worldwide. Currently, a targeted therapy via monoclonal antibodies (mAbs) specific to tumor-associated antigen is undergoing continual development in HCC treatment. Methods In this regard, after establishing and consequently exploring Hep88 mAb’s tumoricidal effect on hepatocellular carcinoma cell line (HepG2 cell line), the Hep88 mAb’s specific antigens from both membrane and cytoplasmic fractions of HepG2 cell line were identified by 2-D gel electrophoresis and western blot analysis. After in-gel digestion and subsequent analysis by liquid chromatography-mass spectrometry (LC-MS), mortalin (HSPA9) and alpha-enolase were identified. The recombinant proteins specific to Hep88 mAb were cloned and expressed in E. coli BL21(DE3). Moreover, alteration of HepG2 and Chang liver cell line after being induced by Hep88 mAb for 1–3 days was investigated using a transmission electron microscope. Results The result demonstrated that Hep88 mAb can bind to the recombinant mortalin (HSPA9) and alpha-enolase. In addition, the gradual appearing of mitochondria vacuolization and endoplasmic reticulum dilatation were observed. Those characteristics might be explained by the paraptosis-like program cell death (PCD), which is induced by the binding of Hep88 mAb to mortalin (HSPA9). Mortalin depletion resulting from the formation of Hep88 mAb-mortalin (HSPA9) complex might initiate transcription-independence of p53-mediated apoptosis. Additionally, Hep88mAb-alpha-enolase complex might initiate HepG2 cells energy exhaustion by glycolysis pathway obstruction. Conclusion These fascinating results imply that Hep88 mAb might be a promising tool for the development of an effective treatment of HCC in the next decade.

2014-01-01

471

Use of CAP88 at Department of Energy Sites  

SciTech Connect

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

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

2013-08-16

472

The STS-88 crew and families DEPART for Houston  

NASA Technical Reports Server (NTRS)

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

1998-01-01

473

Approximate change in water levels in wells in the Chicot and Evangeline aquifers 1977-88 and 1987-88, and measured compaction, 1973-88, in the Houston-Galveston region, Texas  

USGS Publications Warehouse

This report consists of: (1) four maps that present data on water level changes during 1977-88 and 1987-88 in the Chicot and Evangeline aquifers in the Houston area of Texas, and (2) one set of graphs and one map that present data on the compaction of subsurface materials for 1973-88. (USGS)

Gabrysch, R.K.; Ranzau, C.E., Jr.; Coplin, L.S.

1988-01-01

474

Radiographic Response to Yttrium-90 Radioembolization in Anterior Versus Posterior Liver Segments  

SciTech Connect

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{sup 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.

Ibrahim, Saad M.; Lewandowski, Robert J.; Ryu, Robert K.; Sato, Kent T.; Gates, Vanessa L. [Northwestern University, Department of Radiology, Section of Interventional Radiology (United States); Mulcahy, Mary F. [Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Department of Medicine, Division of Hematology and Oncology (United States); Kulik, Laura [Northwestern University, Department of Medicine, Division of Hepatology (United States); Larson, Andrew C. [Northwestern University, Department of Biomedical Engineering (United States); Omary, Reed A.; Salem, Riad, E-mail: r-salem@northwestern.ed [Northwestern University, Department of Radiology, Section of Interventional Radiology (United States)

2008-11-15

475

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

476

An evaluation of repeat intra-articular injections of yttrium-90 colloids in persistent synovitis of the knee.  

PubMed Central

The effectiveness of a second intra-articular injection of yttrium-90 colloid was studied in 30 patients with persistent synovitis of the knee. All had responded poorly to a first injection of yttrium-90 yet seemed likely to benefit from this therapy. With a minimum review period of 6 months complete remission of synovitis was obtained in 20%, while 63% gained symptomatic relief, with some reduction of synovitis. No improvement occurred in 17%, and in this group generalised disease activity was more apparent. PMID:443881

Winfield, J; Gumpel, J M

1979-01-01

477

Histological changes in nontumoral liver secondary to radioembolization of hepatocellular carcinoma with yttrium 90-impregnated microspheres: report of two cases.  

PubMed

Transarterial radioembolization (TARE) with yttrium-90 is a minimally invasive locoregional therapy for hepatocellular carcinoma (HCC), and involves selective delivery of glass or resin microspheres impregnated with radioactive yttrium-90 into small arteries preferentially supplying the tumor for tumoricidal effect thus sparing the nontumoral liver, or into lobar artery to induce atrophy and contralateral hypertrophy. Clinically, post-TARE a small proportion of cases develop radioembolization-induced liver disease. Histological changes of TARE on nontumoral liver parenchyma have not been well characterized. Herein, we report two cases of liver resections for HCC post-TARE, and describe the histological changes in nontumoral liver parenchyma. PMID:25369308

Dhingra, Sadhna; Schwartz, Myron; Kim, Edward; Mabel Ko, Huaibin; Ward, Stephen C; Fiel, M Isabel; Thung, Swan N

2014-11-01

478

Magneto-optical properties of cerium substituted yttrium iron garnet films with reduced thermal budget for monolithic photonic integrated circuits.  

PubMed

Thin films of polycrystalline cerium substituted yttrium iron garnet (CeYIG) were grown on an yttrium iron garnet (YIG) seed layer on Si and Si-on-insulator substrates by pulsed laser deposition, and their optical and magneto-optical properties in the near-IR region were measured. A YIG seed layer of ~30 nm thick processed by rapid thermal anneal at 800°C provided a virtual substrate to promote crystallization of the CeYIG. The effect of the thermal budget of the YIG/CeYIG growth process on the film structure, magnetic and magnetooptical properties was determined. PMID:23263087

Goto, Taichi; Onba?l?, Mehmet C; Ross, C A

2012-12-17

479

PHYSICAL REVIEW B 88, 024303 (2013) Tunable active acoustic metamaterials  

E-print Network

PHYSICAL REVIEW B 88, 024303 (2013) Tunable active acoustic metamaterials Bogdan-Ioan Popa,* Lucian July 2013) We describe and demonstrate an architecture for active acoustic metamaterials whose types of unit cells that generate metamaterials in which either the effective density or bulk modulus

Cummer, Steven A.

480

RAPID COMMUNICATIONS PHYSICAL REVIEW B 88, 060412(R) (2013)  

E-print Network

RAPID COMMUNICATIONS PHYSICAL REVIEW B 88, 060412(R) (2013) Linear magnetoconductivity in multiband. This leads to enhanced quadratic magnetoconductivity at small magnetic field and extended region of the linear magnetoconductivity. The latter effect appears due to the linear growth with the field of regular

Alexei, Koshelev

481

Merged MMCR-WSR88D Reflectivities at SGP  

DOE Data Explorer

There are substantial attenuations of MMCR signals for very large LWP and during precipitation events. We have used the nearest precipitation radar (WSR-88D) to merge two measurements to better represent such selected cases. In the near future, we are going to provide all the cumulus cases from Jan. 1997 to present whenever the two datasets are available. The original 2 data sets:

Dong, Xiquan

482

American Scientist 88: 416-425 A New Urban Ecology  

E-print Network

American Scientist 88: 416-425 A New Urban Ecology Modeling human communities as integral parts that emerge when one attempts to adapt ecological theory to include humans. In this article we attempt ecology" was coined by sociologists who sought to use ecological theory to describe human behavior

Borer, Elizabeth T.

483

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

484

Data Papers Ecology, 88(6), 2007, p. 1605  

E-print Network

Data Papers Ecology, 88(6), 2007, p. 1605 Ã? 2007 by the the Ecological Society of America AVIAN characteristic of animals, influencing physiology, life histories, and general ecology. Hence, it often needs a comprehensive data set on avian body sizes that would be useful for future comparative studies of avian biology

Figuerola, Jordi

485

RAPID COMMUNICATIONS PHYSICAL REVIEW B 88, 060507(R) (2013)  

E-print Network

RAPID COMMUNICATIONS PHYSICAL REVIEW B 88, 060507(R) (2013) Local structure, stripe pinning formation is purely electronically driven or triggered by distortions of the underlying crystal lattice. Two an orthorhombic distortion of the CuO2 planes.12 In La2-xBaxCuO4 the local symmetry is reduced by a buckling

Haskel, Daniel

486

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

487

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

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

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

488

Synthesis and luminescent performances of some europium activated yttrium oxide based systems  

Microsoft Academic Search

Phosphors based on solid solutions of Y2O3–La2O3–Gd2O3 and Y2O2S–La2O2S–Gd2O2S and YVO4–GdVO4 doped by Eu3+ were synthesized by different methods. The influence of a matrix composition and an activator concentration on phosphor’s light-emitting performances is described in order to propose the optimized synthesis conditions. Europium-doped yttrium, lanthanum and gadolinium oxysulphides phosphors show higher CL-efficiency at low applied voltages than oxides ones.

Michael Nazarov; Jong Hyuk Kang; Duk Young Jeon; Sergey Bukesov; Tatiana Akmaeva

2005-01-01

489

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

490

Electromagnetic excitation of ultrasonic oscillations by yttrium iron garnet films on gallium gadolinium garnet substrates  

NASA Astrophysics Data System (ADS)

We have studied the phenomenon of contactless excitation of ultrasonic oscillations by thin yttrium iron garnet (YIG) films on gallium gadolinium garnet (GGG) substrates upon application of the superposition of a constant magnetic bias field and alternating magnetic field. Dimensional resonance effects that cannot be explained in the framework of existing theoretical notions have been discovered, in particular, in dependences of the amplitude of excited longitudinal oscillations on the YIG film thickness, frequency of ultrasound, and degree of homogeneity and strength of the magnetic bias field. It is suggested that the observed phenomenon is caused by resonant participation of the intrinsic oscillations of domain walls in the excitation of ultrasound.

Sarnatskii, V. M.; Mavlonazarov, I. O.; Lutsev, L. V.

2014-07-01

491

A nonreciprocal racetrack resonator based on vacuum-annealed magnetooptical cerium-substituted yttrium iron garnet.  

PubMed

Vacuum annealed polycrystalline cerium substituted yttrium iron garnet (CeYIG) films deposited by radio frequency magnetron sputtering on non-garnet substrates were used in nonreciprocal racetrack resonators. CeYIG annealed at 800°C for 30 min provided a large Faraday rotation angle, close to the single crystal value. Crystallinity, magnetic properties, refractive indices and absorption coefficients were measured. The resonant transmission peak of the racetrack resonator covered with CeYIG was non-reciprocally shifted by applying an in-plane magnetic field. PMID:25320991

Goto, Taichi; Onbasli, Mehmet C; Kim, Dong Hun; Singh, Vivek; Inoue, M; Kimerling, Lionel C; Ross, C A

2014-08-11

492

Yttrium-dispersed C60 fullerenes as high-capacity hydrogen storage medium.  

PubMed

Interaction between hydrogen molecules and functionalized C60 is investigated using density functional theory method. Unlike transition metal atoms that tend to cluster on the surface, C60 decorated with 12 Yttrium atoms on each of its 12 pentagons is extremely stable and remarkably enhances the hydrogen adsorption capacity. Four H2 molecules can be chemisorbed on a single Y atom through well-known Dewar-Chatt-Duncanson interaction. The nature of bonding is a weak physisorption for the fifth adsorbed H2 molecule. Consequently, the C60Y12 complex with 60 hydrogen molecules has been demonstrated to lead to a hydrogen storage capacity of ?6.30 wt. %. PMID:24588190

Tian, Zi-Ya; Dong, Shun-Le

2014-02-28

493

Yttrium-dispersed C60 fullerenes as high-capacity hydrogen storage medium  

NASA Astrophysics Data System (ADS)

Interaction between hydrogen molecules and functionalized C60 is investigated using density functional theory method. Unlike transition metal atoms that tend to cluster on the surface, C60 decorated with 12 Yttrium atoms on each of its 12 pentagons is extremely stable and remarkably enhances the hydrogen adsorption capacity. Four H2 molecules can be chemisorbed on a single Y atom through well-known Dewar-Chatt-Duncanson interaction. The nature of bonding is a weak physisorption for the fifth adsorbed H2 molecule. Consequently, the C60Y12 complex with 60 hydrogen molecules has been demonstrated to lead to a hydrogen storage capacity of ˜6.30 wt. %.

Tian, Zi-Ya; Dong, Shun-Le

2014-02-01

494

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

495

Positron lifetime measurements of hydrogen passivation of cation vacancies in yttrium aluminum oxide garnets  

NASA Astrophysics Data System (ADS)

A charge compensation mechanism is proposed for cation vacancy defects in complex oxides based on positron lifetime measurements, infrared spectroscopy, and composition analysis. Defects were characterized in samples of yttrium aluminum garnet grown in O2 or Ar. However, no positron trapping was detected in samples grown in H2. This is attributed to decoration of cation vacancies with hydrogen, thereby passivating charges of vacancies that otherwise function as positron traps. Infrared spectroscopy gave direct evidence of the presence of hydrogen. Passivation of cation vacancies with hydrogen is proposed as an important mechanism for charge compensation in the defect physics of oxides.

Selim, F. A.; Varney, C. R.; Tarun, M. C.; Rowe, M. C.; Collins, G. S.; McCluskey, M. D.

2013-11-01

496

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

497

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

498

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

499

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

500

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