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1

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

Microsoft Academic Search

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

Richard C. Heaton; Jamriska; David J; Wayne A. Taylor

1994-01-01

2

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

SciTech Connect

One factor that is critical to the potential effectiveness of radioimmunotherapy is the design of radiometal-chelated antibodies that will be stable in vivo. Stability in vivo depends on the condition that both the chelate linkage and radiolabeling procedures not alter antibody specificity and biodistribution. In addition, synthesis and selection of the chelating agent is critical for each radiometal in order to prevent inappropriate release of the radiometal in vivo. In the present study, we compare the in vivo stability of seven radioimmunoconjugates that use different polyaminocarboxylate chelating agents to complex yttrium-88 to the mouse anti-human interleukin-2 receptor monoclonal antibody, anti-Tac. Chelate linkage and radiolabeling procedures did not alter the immunospecificity of anti-Tac. In order to assess whether yttrium was inappropriately released from the chelate-coupled antibody in vivo, iodine-131-labeled and yttrium-88 chelate-coupled antibodies were simultaneously administered to the same animals to correlate the decline in yttrium and radioiodinated antibody activity. The four stable yttrium-88 chelate-coupled antibodies studied displayed similar iodine-131 and yttrium-88 activity, indicating minimal elution of yttrium-88 from the complex. In contrast, the unstable yttrium-88 chelate-coupled antibodies had serum yttrium-88 activities that declined much more rapidly than their iodine-131 activities, suggesting loss of the radiolabel yttrium-88 from the chelate. Furthermore, high rates of yttrium-88 elution correlated with deposition in bone. Four chelating agents emerged as promising immunotherapeutic reagents: isothiocyanate benzyl DTPA and its derivatives 1B3M, MX, and 1M3B.

Kozak, R.W.; Raubitschek, A.; Mirzadeh, S.; Brechbiel, M.W.; Junghaus, R.; Gansow, O.A.; Waldmann, T.A. (Center for Biologics Evaluation and Research, FDA, Bethesda, MD (USA))

1989-05-15

3

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

PubMed

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

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

2009-12-01

4

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

NASA Astrophysics Data System (ADS)

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

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

2005-07-01

5

Targeted Disruption of the MyD88 Gene Results in Loss of IL1- and IL18-Mediated Function  

Microsoft Academic Search

MyD88, originally isolated as a myeloid differentiation primary response gene, is shown to act as an adaptor in interleukin-1 (IL-1) signaling by interacting with both the IL-1 receptor complex and IL-1 receptor–associated kinase (IRAK). Mice generated by gene targeting to lack MyD88 have defects in T cell proliferation as well as induction of acute phase proteins and cytokines in response

Osamu Adachi; Taro Kawai; Kiyoshi Takeda; Makoto Matsumoto; Hiroko Tsutsui; Masafumi Sakagami; Kenji Nakanishi; Shizuo Akira

1998-01-01

6

Thick target DT neutron yield measurements using metal occluders of scandium, titanium, yttrium, zirconium, gadolinium, erbium, hafnium, and tantalum at energies from 25 to 200 keV  

Microsoft Academic Search

Deuterium-Tritium (D-T) neutron yields from thick films of scandium, titanium, yttrium, zirconium, gadolinium, erbium, hafnium, and tantalum were measured by the associated particle technique using the 200-keV accelerator at the Pinellas Plant. The neutron yields were measured for all targets at energies from 25 to 200 keV in 5-keV steps with an average uncertainty of ±6.8%. Tabulated results are presented

D. J. Malbrough; J. T. Jr. Molloy; R. H. Becker

1990-01-01

7

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

NASA Astrophysics Data System (ADS)

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

Farhat, Rabab

8

Synthesis and Evaluation of Bombesin Derivatives on the Basis of Pan-Bombesin Peptides Labeled with Indium111, Lutetium177, and Yttrium90 for Targeting Bombesin Receptor-Expressing Tumors  

Microsoft Academic Search

Bombesin receptors are overexpressed on a variety of human tumors like prostate, breast, and lung cancer. The aim of this study was to develop radiolabeled (Indium-111, Lutetium-177, and Yttrium-90) bombesin an- alogues with affinity to the three bombesin receptor subtypes for targeted radiotherapy. The following structures were synthesized: diethylenetri- aminepentaacetic acid--aminobutyric acid-(D-Tyr6, -Ala11, Thi13, Nle14) bombesin (6 -14) (BZH1) and

Hanwen Zhang; Jianhua Chen; Christian Waldherr; Karin Hinni; Beatrice Waser; Jean Claude Reubi; Helmut R. Maecke

9

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

10

HCV-induced miR-21 contributes to evasion of host immune system by targeting MyD88 and IRAK1.  

PubMed

Upon recognition of viral components by pattern recognition receptors, such as the toll-like receptors (TLRs) and retinoic acid-inducible gene I (RIG-I)-like helicases, cells are activated to produce type I interferon (IFN) and proinflammatory cytokines. These pathways are tightly regulated by the host to prevent an inappropriate cellular response, but viruses can modulate these pathways to proliferate and spread. In this study, we revealed a novel mechanism in which hepatitis C virus (HCV) evades the immune surveillance system to proliferate by activating microRNA-21 (miR-21). We demonstrated that HCV infection upregulates miR-21, which in turn suppresses HCV-triggered type I IFN production, thus promoting HCV replication. Furthermore, we demonstrated that miR-21 targets two important factors in the TLR signaling pathway, myeloid differentiation factor 88 (MyD88) and interleukin-1 receptor-associated kinase 1 (IRAK1), which are involved in HCV-induced type I IFN production. HCV-mediated activation of miR-21 expression requires viral proteins and several signaling components. Moreover, we identified a transcription factor, activating protein-1 (AP-1), which is partly responsible for miR-21 induction in response to HCV infection through PKC?/JNK/c-Jun and PKC?/ERK/c-Fos cascades. Taken together, our results indicate that miR-21 is upregulated during HCV infection and negatively regulates IFN-? signaling through MyD88 and IRAK1 and may be a potential therapeutic target for antiviral intervention. PMID:23633945

Chen, Yanni; Chen, Junbo; Wang, Hui; Shi, Jingjing; Wu, Kailang; Liu, Shi; Liu, Yingle; Wu, Jianguo

2013-01-01

11

METALLOTHERMIC REDUCTION OF YTTRIUM HALIDES  

Microsoft Academic Search

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

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

1962-01-01

12

Investigation on Yttrium Activity in Liquid Aluminum by Yttrium Sensor  

NASA Astrophysics Data System (ADS)

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

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

2008-04-01

13

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

14

Synthesis and evaluation of bombesin derivatives on the basis of pan-bombesin peptides labeled with indium-111, lutetium-177, and yttrium-90 for targeting bombesin receptor-expressing tumors.  

PubMed

Bombesin receptors are overexpressed on a variety of human tumors like prostate, breast, and lung cancer. The aim of this study was to develop radiolabeled (Indium-111, Lutetium-177, and Yttrium-90) bombesin analogues with affinity to the three bombesin receptor subtypes for targeted radiotherapy. The following structures were synthesized: diethylenetriaminepentaacetic acid-gamma-aminobutyric acid-[D-Tyr6, beta-Ala11, Thi13, Nle14] bombesin (6-14) (BZH1) and 1,4,7,10-tetraazacyclododecane-N,N',N",N"' -tetraacetic acid-gamma-aminobutyric acid-[D-Tyr6, beta-Ala11, Thi13, Nle14] bombesin (6-14) (BZH2). [111In]-BZH1 and in particular [90Y]-BZH2 were shown to have high affinity to all three human bombesin receptor subtypes with binding affinities in the nanomolar range. In human serum metabolic cleavage was found between beta-Ala11 and His12 with an approximate half-life of 2 hours. The metabolic breakdown was inhibited by EDTA and beta-Ala11-His12 (carnosine) indicating that carnosinase is the active enzyme. Both 111In-labeled peptides were shown to internalize into gastrin-releasing peptide-receptor-positive AR4-2J and PC-3 cells with similar high rates, which were independent of the radiometal. The biodistribution studies of [111In]-BZH1 and [111In]-BZH2 ([177Lu]-BZH2) in AR4-2J tumor-bearing rats showed specific and high uptake in gastrin-releasing peptide-receptor-positive organs and in the AR4-2J tumor. A fast clearance from blood and all of the nontarget organs except the kidneys was found. These radiopeptides were composed of the first pan-bombesin radioligands, which show great promise for the early diagnosis of tumors bearing not only gastrin-releasing peptide-receptors but also the other two bombesin receptor subtypes and may be of use in targeted radiotherapy of these tumors. PMID:15374988

Zhang, Hanwen; Chen, Jianhua; Waldherr, Christian; Hinni, Karin; Waser, Beatrice; Reubi, Jean Claude; Maecke, Helmut R

2004-09-15

15

Study of Yttrium Hydroxide Formation.  

National Technical Information Service (NTIS)

A study was made of yttrium hydroxide formation in sulphuric acid, chlorine and nitric acid solutions by means of the solubility method, measurement of pH and equilibrium solution electroconductivity, apparent residue volume, and x-ray phase analysis. It ...

I. M. Polyashkov N. V. Mal'kevich I. A. Grishin

1973-01-01

16

Electronic Transitions of Yttrium Monoxide  

NASA Astrophysics Data System (ADS)

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

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

2013-06-01

17

METHOD FOR SEPARATING THORIUM AND YTTRIUM VALUES  

Microsoft Academic Search

A method is presented for the recovery of thorium and yttrium values ; from dilute aqueous acidic solutions. The aqueous acidic salt solution ; containing dissolved thorium and yttrium values is brought into contact with a ; bed of a chelating resin, which shows a preferential sorption for the thorium ; values. The chelating resin can be easily regenerated for

Vanderkooi

1963-01-01

18

The Schottky barrier height and Auger studies of yttrium and yttrium silicide on silicon  

Microsoft Academic Search

Schottky barrier diodes of yttrium and yttrium silicide were fabricated on p-type (111) silicon. The barrier heights of the diodes determined by I-V measurements were correlated with heat treatments and interface conditions as determined by Auger composition depth profiles. The as-deposited Y-Si contact had a barrier height of 0.70 eV. During heat treatment at 300 °C, oxygen diffused into yttrium

G. J. Campisi; A. J. Bevolo; F. A. Schmidt

1981-01-01

19

The Schottky barrier height and Auger studies of yttrium and yttrium silicide on silicon  

Microsoft Academic Search

Schottky barrier diodes of yttrium and yttrium silicide were fabricated on p-type (111) silicon. The barrier heights of the diodes determined by I-V measurements were correlated with heat treatments and interface conditions as determined by Auger composition depth profiles. The as-deposited Y-Si contact had a barrier height of 0.70 eV. During heat treatment at 300 °C, oxygen diffused into yttrium

G. J. Campisi; A. J. Bevolo; F. A. Schmidt

1981-01-01

20

Magnetoelastic waves in yttrium orthoferrite plates  

NASA Astrophysics Data System (ADS)

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

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

2008-02-01

21

Observation of Bloch lines in yttrium orthoferrite  

Microsoft Academic Search

Utilizing the dark field method, parts of different brightness within domain walls of yttrium orthoferrite have been observed. Dark segments between these parts and the dependence of their positions on an applied magnetic field indicate the presence of Bloch lines.

Y. S Didosyan; H. Hauser

1998-01-01

22

Infrared Isolator Using Yttrium Iron Garnet.  

National Technical Information Service (NTIS)

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

H. Gamo S. S. Chuang

1970-01-01

23

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

24

Interaction of oxygen vacancies in yttrium germanates.  

PubMed

Forming a good Ge/dielectric interface is important to improve the electron mobility of a Ge metal oxide semiconductor field-effect transistor. A thin yttrium germanate capping layer can improve the properties of the Ge/GeO(2) system. We employ electronic structure calculations to investigate the effect of oxygen vacancies in yttrium-doped GeO(2) and the yttrium germanates Y(2)Ge(2)O(7) and Y(2)GeO(5). The calculated densities of states indicate that dangling bonds from oxygen vacancies introduce in-gap states, but the system remains insulating. However, yttrium-doped GeO(2) becomes metallic under oxygen deficiency. Y-doped GeO(2), Y(2)Ge(2)O(7) and Y(2)GeO(5) are calculated to be oxygen substoichiometric under low Fermi energy conditions. The use of yttrium germanates is proposed as a way to effectively passivate the Ge/dielectric interface. PMID:23032364

Wang, H; Chroneos, A; Dimoulas, A; Schwingenschlögl, U

2012-11-14

25

Yttrium hole-barrier contacts for germanium semiconductor detectors  

NASA Astrophysics Data System (ADS)

Sputtered yttrium metal forms a thin hole-barrier contact on both p- and n-type germanium semiconductor detectors. Yttrium contacts can provide a sufficiently high hole barrier to prevent measurable contact leakage current below ˜120 K. Detectors having yttrium contacts produce good gamma-ray spectroscopy data.

Hull, Ethan L.; Pehl, Richard H.; Lathrop, James R.; Suttle, Bruce E.

2011-01-01

26

Yttrium hole-barrier contacts for germanium semiconductor detectors  

Microsoft Academic Search

Sputtered yttrium metal forms a thin hole-barrier contact on both p- and n-type germanium semiconductor detectors. Yttrium contacts can provide a sufficiently high hole barrier to prevent measurable contact leakage current below ?120K. Detectors having yttrium contacts produce good gamma-ray spectroscopy data.

Ethan L. Hull; Richard H. Pehl; James R. Lathrop; Bruce E. Suttle

2011-01-01

27

Proton trapping in yttrium-doped barium zirconate  

NASA Astrophysics Data System (ADS)

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

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

2013-07-01

28

Effect of N2 plasma on yttrium oxide and yttrium-oxynitride dielectrics  

Microsoft Academic Search

In this article, we report the effect of nitrogen plasma, during and after deposition, on nitrogen incorporation into yttrium oxide dielectric films. Films are deposited using a yttrium beta-diketonate precursor (Y(tmhd)3) introduced downstream from a O2 or N2 plasma. The precursor acted as a significant source of oxygen, and only small amounts of N (<10 at. %) were incorporated in

D. Niu; R. W. Ashcraft; C. Hinkle; G. N. Parsons

2004-01-01

29

Effect of N2 plasma on yttrium oxide and yttrium-oxynitride dielectrics  

Microsoft Academic Search

In this article, we report the effect of nitrogen plasma, during and after deposition, on nitrogen incorporation into yttrium oxide dielectric films. Films are deposited using a yttrium b-diketonate precursor (Y~tmhd)3) introduced downstream from a O2 or N2 plasma. The precursor acted as a significant source of oxygen, and only small amounts of N ~,10 at. %! were incorporated in

D. Niua; R. W. Ashcraft; G. N. Parsons

30

Target  

US Patent & Trademark Office Database

The present invention relates to an isolated target sequence. The target sequence is a splice variant of PDE5 called a PDE5a1, a component of which is presented as SEQ ID No 1. The identified target sequence of the present invention may be used to as a target to identify agents (such as modulators) useful in the prevention and/or treatment of a disease associated with scarring and/or fibrosis or to selectively identify smooth muscle cells and myofibroblasts and myoepithelial cells in samples of normal and diseased tissue from individuals.

2004-09-21

31

Spectroscopy of88Y homologous levels  

NASA Astrophysics Data System (ADS)

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

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

1996-12-01

32

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

Code of Federal Regulations, 2013 CFR

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

2013-07-01

33

Fabrication of transparent yttrium aluminum garnet ceramic  

Microsoft Academic Search

In this paper, the synthesis of Nd-doped yttrium aluminum garnet (Nd:YAG) spherical nano-crystallites was investigated by using the solvothermal method, and the optimum processing conditions for processing the transparent ceramic preparation was determined. Powder consisting of nanosized particles obtained by the solvothermal method displays significantly less crystallite agglomeration, indicating a high degree of sinterability. The phase structure and the morphology

Xia Li

2009-01-01

34

Superconducting wires based on a yttrium ceramic  

Microsoft Academic Search

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

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

1991-01-01

35

Method of making yttrium silicon oxynitrides  

Microsoft Academic Search

A method of making a powder additive consisting of yttrium silicon oxynitrides, preferably of the YââSiâOââNâ or YSiOâN phases, is disclosed. Stoichiometric amounts of YâOâ, SiOâ, and SiâNâ are mixed and arranged in intimate reactive contact, the amounts being to form a desired oxynitride according to the formula Y \\/sub a\\/ Si \\/sub b\\/ O \\/sub c\\/ N \\/sub d\\/

A. Ezis; H. D. Blair

1985-01-01

36

Yttrium90 DOTATOC: first clinical results  

Microsoft Academic Search

.   In a pilot study, DOTA-d-Phe1-Tyr3-octreotide (DOTATOC), which can be labelled with the ?-emitting radioisotope yttrium-90, has recently been used for the treatment\\u000a of patients with advanced somatostatin receptor-positive tumours who had no other treatment option. The aim of the present\\u000a study was to elucidate the therapeutic potential of 90Y-DOTATOC in a larger number of patients employing a standardized treatment

A. Otte; R. Herrmann; A. Heppeler; M. Behe; E. Jermann; P. Powell; H. R. Maecke; J. Muller

1999-01-01

37

Subsonic domain wall dynamics in yttrium orthoferrite  

Microsoft Academic Search

The domain wall (DW) velocity versus field dependence in the subsonic range of 0.2–1.1 km\\/s is studied. The sample is a plate of yttrium orthoferrite YFeO3 cut perpendicular to the optical axis. The specific Faraday rotation for a wavelength of 0.63 mm equals ? 2900 °\\/cm. A single rectilinear 180° DW was created by applying a quadrupole field. The DW

Y. S. Didosyan; H. Hauser; V. Y. Barash; P. L. Fulmek

1998-01-01

38

Faraday effect in yttrium and dysprosium orthoferrites  

Microsoft Academic Search

The Faraday effect in YFeO3and DyFeO3was investigated in the wavelength region from 0.6 to 1.8 ?. A gas laser operating at 0.63, 1.15, and 3.39 ? was used. The Faraday rotation in yttrium and dysprosium orthoferrites at the wavelength 0.63 ? is equal to - 3000°\\/cm and - 4000°\\/cm, respectively. These values accord with figures calculated from the measurements when

M. Chetkin; Didosjan Ju; A. Akhutkina

1971-01-01

39

The Abundance Of Yttrium In Cool Stars  

NASA Astrophysics Data System (ADS)

We report on a near-IR study of the abundance of yttrium in the cool, luminous stars ? Ori (M2 Iab), RX Boo (M7.5), TX Psc (C6.2) and ? Cyg (S7.1). Yttrium can be produced in the weak s-process in massive stars and is an important component of the main s-process in AGB stars. As a result, the yttrium abundance can provide insight into the nucleosynthesis processes in the advanced stages of both massive and solar-mass stars. Although the near-IR is especially well suited to the spectroscopic study of cool stars, previous abundance studies have been limited by the lack of atomic data. We have obtained laboratory atomic data for several lines in the Y I spectrum in this region. Using these data, more accurate abundance estimates have been obtained. We compare the new lab results with astrophysical gf-values we obtain from the spectrum of the Sun, ? Boo (K0 Ib), and HD61913 (M3 II/III).

Norris, Ryan P.; Wahlgren, G. M.; Blackwell-Whitehead, R.

2010-01-01

40

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

41

Hydrogen trapping by yttrium in low temperature lithium  

NASA Astrophysics Data System (ADS)

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

Anantatmula, R. P.; Katsuta, Hiroji

1984-05-01

42

Investigation of the high spin structure of Zr88  

NASA Astrophysics Data System (ADS)

High spin states of Zr88 were populated with Se80(C13, 5n) fusion evaporation reaction. A thin target as well as Au backed target were used in two different experiments for the present study. Excited levels of Zr88 have been observed up to spin ˜20? and an excitation energy of ˜10 MeV. Spin and parity of most of the states have been determined from directional correlation and polarization measurements. The level scheme was substantially extended with the addition of a number of high spin states and transitions. The comparison of the measured levels of Zr88 with large shell model calculations based on the full unrestricted f5/2pg9/2 model space established the dominance of shell-model excitation up to the highest observed spin.

Saha, S.; Palit, R.; Sethi, J.; Biswas, S.; Singh, P.; Trivedi, T.; Choudhury, D.; Srivastava, P. C.

2014-04-01

43

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

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

A New Yttrium Boride: YB 25  

NASA Astrophysics Data System (ADS)

A new yttrium boride has been found to exist between YB 12and YB 50. A single phase was established at a nominal composition of [B]/[Y]=25.5-26.0. X ray powder diffraction and electron diffraction analyses showed that the new YB 25phase has a monoclinic system with a=0.82842(3) nm, b=1.03203(3) nm, c=0.58570(2) nm, ?=90.402(3)°, and space group I121(No. 5), I1 m1 (No. 8), or I12/ m1 (No. 12). Rare earth elements from Gd to Ho can also form compounds isostructural to YB 25.

Tanaka, T.; Okada, S.; Yu, Y.; Ishizawa, Y.

1997-10-01

46

STS-88 Day 04 Highlights  

NASA Technical Reports Server (NTRS)

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

1998-01-01

47

STS-88 Day 03 Highlights  

NASA Technical Reports Server (NTRS)

On this third 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 check out the various tools they will use during the three scheduled spacewalks to be conducted later in the flight. They then begin an early set-up of the Shuttle's airlock in preparation for that first spacewalk. Newman and Russian cosmonaut Sergei Krikalev take part in an on-line interview by the New York Times. Currie is seen placing Unity just inches above the extended outer ring on Endeavour's docking mechanism, enabling Commander Bob Cabana to fire downward maneuvering jets to lock the shuttle's docking system to one of two Pressurized Mating Adapters (PMA's) attached to Unity.

1998-01-01

48

49 CFR 393.88 - Television receivers.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Television receivers. 393.88 Section 393...Parts and Accessories § 393.88 Television receivers. Any motor vehicle equipped with a television viewer, screen or other means of...

2013-10-01

49

32 CFR 88.4 - Policy.  

Code of Federal Regulations, 2013 CFR

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

2013-07-01

50

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

51

Thermal stability of the decomposition products of yttrium hydroxochromate  

SciTech Connect

The process of formation of yttrium chromite by decomposition of yttrium hydroxochromite is completed at 900/sup 0/C. With further rise in temperature the structure of the chromite is perfected. The yttrium chromite is a highly disperse product. The dimension of the powder particles at 1000-1100/sup 0/C is 1 ..mu..m. The particles are equiaxial. The specific surface area is 1-1.5 m/sup 2//g. Increase of the temperature and duration of heat treatment increases the particle dimension to 2 ..mu..m.

Zakharova, N.D.; Zhitkova, T.N.; Kalitina, L.N.; Seliverstov, N.F.; Ryabin, V.A.; Ponomareva, V.I.

1987-04-01

52

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

53

Incomplete spin reorientation in yttrium orthoferrite  

NASA Astrophysics Data System (ADS)

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

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

2011-09-01

54

Ferroelectricity in yttrium-doped hafnium oxide  

NASA Astrophysics Data System (ADS)

Structural and electrical evidence for a ferroelectric phase in yttrium doped hafnium oxide thin films is presented. A doping series ranging from 2.3 to 12.3 mol% YO1.5 in HfO2 was deposited by a thermal atomic layer deposition process. Grazing incidence X-ray diffraction of the 10 nm thick films revealed an orthorhombic phase close to the stability region of the cubic phase. The potential ferroelectricity of this orthorhombic phase was confirmed by polarization hysteresis measurements on titanium nitride based metal-insulator-metal capacitors. For 5.2 mol% YO1.5 admixture the remanent polarization peaked at 24 ?C/cm2 with a coercive field of about 1.2 MV/cm. Considering the availability of conformal deposition processes and CMOS-compatibility, ferroelectric Y:HfO2 implies high scaling potential for future, ferroelectric memories.

Müller, J.; Schröder, U.; Böscke, T. S.; Müller, I.; Böttger, U.; Wilde, L.; Sundqvist, J.; Lemberger, M.; Kücher, P.; Mikolajick, T.; Frey, L.

2011-12-01

55

Pressure-Induced Superconductivity in Cesium and Yttrium.  

National Technical Information Service (NTIS)

Superconductivity has been observed in a high-pressure phase of cesium. Yttrium, normal at zero pressure down to millidegree temperatures, shows pressure-induced superconductivity above 110 kbar, apparently without change in crystal structure. Superconduc...

J. Wittig

1970-01-01

56

Formation of Hydroxy and Basic Salts of Yttrium.  

National Technical Information Service (NTIS)

By means of solubility, electric conductivity, potentiometry, thermography, crystallography, and chemical analysis, the mechanism of the reaction of yttrium, nitrate, chloride, sulfate, and acetate solutions with caustic soda was studied at different rati...

N. V. Mzareulishvili

1966-01-01

57

Inelastic collisions of slow electrons with yttrium trichloride molecules  

Microsoft Academic Search

Inelastic collisions of electrons with YCl3 molecules are investigated by the method of extended crossing beams. As in the case of LaCl3 molecules, only the spectral lines of singly charged metal ions are found, with the lines of yttrium atoms and the spectral\\u000a bands of yttrium monochloride being absent. The excitation cross sections of the energy levels of Y(II) and

Yu. M. Smirnov

2006-01-01

58

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

NASA Astrophysics Data System (ADS)

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

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

59

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

NASA Astrophysics Data System (ADS)

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

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

60

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

-- In the Orbiter Processing Facility Bay 1, STS-88 Mission Specialists Sergei Krikalev (left), a cosmonaut from Russia; and Jerry L. Ross examine equipment that will be aboard Space Shuttle Endeavour. Launch of mission STS-88 is targeted for Dec. 3, 1998. The STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT), familiarizing themselves with the orbiter's midbody and crew compartments. Other crew members are Commander Robert D. Cabana, Pilot Frederick W. 'Rick' Sturckow and Mission Specialists Nancy J. Currie and James H. Newman. STS- 88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

61

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

-- In the Orbiter Processing Facility Bay 1, STS-88 Mission Specialists (left to right) Jerry L. Ross; Sergei Krikalev, a cosmonaut from Russia; and James H. Newman examine equipment that will be on the Space Shuttle Endeavour during their upcoming flight. Launch of Mission STS-88 is targeted for Dec. 3, 1998. The STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT), familiarizing themselves with the orbiter's midbody and crew compartments. Other crew members are Commander Robert D. Cabana, Pilot Frederick W. 'Rick' Sturckow and Mission Specialist Nancy J. Currie. STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

62

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

Clad in their blue flight suits, STS-88 Mission Specialists (from left) Sergei Krikalev, a cosmonaut from Russia; Jerry L. Ross; and James H. Newman examine equipment from a toolbox that will be on the Space Shuttle Endeavour during their flight. Talking to Ross is Wayne Wedlake of United Space Alliance at Johnson Space Center, while Henry Thacker (facing camera), of Flight Crew Systems at KSC, looks on. Launch of mission STS-88 is targeted for Dec. 3, 1998. The STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT) in the Orbiter Processing Facility Bay 1 to familiarize themselves with the orbiter's midbody and crew compartments. STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

63

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

Inside the payload bay of orbiter Endeavour in the Orbiter Processing Facility Bay 1, STS-88 Mission Specialists Jerry L. Ross (left) and James H. Newman (right foreground) get a close look at the Orbiter Docking System. The STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT), familiarizing themselves with the orbiter's midbody and crew compartments. Targeted for liftoff on Dec. 3, 1998, STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. While on orbit during STS-88, Unity will be latched atop the Orbiter Docking System in the forward section of Endeavour's payload bay for the mating of the two modules. After the mating, Ross and Newman are scheduled to perform three spacewalks to connect power, data and utility lines and install exterior equipment. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

64

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

65

Fabrication of transparent yttrium aluminum garnet ceramic  

NASA Astrophysics Data System (ADS)

In this paper, the synthesis of Nd-doped yttrium aluminum garnet (Nd:YAG) spherical nano-crystallites was investigated by using the solvothermal method, and the optimum processing conditions for processing the transparent ceramic preparation was determined. Powder consisting of nanosized particles obtained by the solvothermal method displays significantly less crystallite agglomeration, indicating a high degree of sinterability. The phase structure and the morphology of the YAG crystallites were depended on the reaction conditions, the optimum temperature is 300 centigrade for 1h, at which the pure phase of spherically shaped YAG nanoparticles can be obtained. Microstructure evolution at different sintering stages demonstrated that fully transparent YAG ceramic can be fabricated by vacuum sintering at 1750 centigrade for 5h by using the as-synthesized powders. The ceramic has a relative density of about 99.98% of the theoretical value, and an average grain size of about 3-5?m. The transmittance of the ceramic is 55% in the visible range, and 70% in the infrared range.

Li, Xia

2009-03-01

66

Crystallization of lanthanum and yttrium aluminosilicate glasses  

NASA Astrophysics Data System (ADS)

The crystallization behaviour of aluminosilicate glasses of lanthanum (LAS) and yttrium (YAS) containing 2-8 mol% of Ln 2O 3 (Ln = La or Y), 12-30 mol% of Al 2O 3, and 64-80 mol% of SiO 2 has been studied by DTA, XRD and SEM-EDX analysis. X-ray diffraction results indicate the presence of the mullite phase and La 2Si 2O 7 in the monoclinic high-temperature G form (group space P2 1/c) for the LAS glasses, and mullite y-Y 2Si 2O 7 in the monoclinic structure (group space C2/m) and a small amount of ?-Y 2Si 2O 7 in the orthorhombic structure (space group Pna2) for the YAS. For both cases, very little tridymite phase is observed. The results also show that the values of Tg for YAS are higher than those for LAS glasses. The crystallization of LAS glasses is more difficult than that of YAS. For all samples, we observed only one kind of mullite (Al/Si = 3.14).

Sadiki, Najim; Coutures, Jean Pierre; Fillet, Catherine; Dussossoy, Jean Luc

2006-01-01

67

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

68

Influence of yttrium and of the oxygen pressure on ? alumina microstructure. Relation with mechanical properties  

NASA Astrophysics Data System (ADS)

The influence of yttrium doping on the alumina microstructure is correlated to the Y amount and to the oxygen pressure. A low oxygen pressure promotes the solubility of yttrium in the bulk, its segregation in grain boundaries and increases the alumina toughness. Moreover alumina grain growth is limited either by garnet precipitation or by yttrium segregation along boundaries.

Loudjani, M. K.; Haut, C.; Parisot, S.

1995-12-01

69

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

70

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

71

High temperature materials chemistry - IV. Volume 88-5  

Microsoft Academic Search

These proceedings collect papers given at a symposium on high temperature material chemistry. Topics include combustion kinetics, titanium nitrides, borides, composites, demetallization, evaporation, mineral matter in coal, vapor deposition, ion implantation, yttrium oxides, uranium oxides, and alloys.

Z. A. Munir; D. Cubicciotti; H. Tagawa

1988-01-01

72

42 CFR 88.1 - Definitions.  

Code of Federal Regulations, 2012 CFR

...CENTER HEALTH PROGRAM § 88.1 Definitions. List of WTC-Related Health Conditions (4) Cancers: This list includes those individual cancer types specified in Table 1, below, according to the International Classification of...

2012-10-01

73

42 CFR 88.2 - General provisions.  

Code of Federal Regulations, 2012 CFR

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

2012-10-01

74

45 CFR 96.88 - Administrative costs.  

Code of Federal Regulations, 2013 CFR

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

2013-10-01

75

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

76

The production of (88)Y in the proton bombardment of (nat)Sr: New excitation and separation studies.  

PubMed

The cyclotron production of (88)Y at iThemba LABS is performed via the reaction (88)Sr(p,n)(88)Y. The yields obtained were inconsistent with nuclear data obtained from the literature and the excitation function of the nuclear reaction was re-measured, using a differentiation of thick-target production rate measurements. Ion exchange chromatographic methods are described to separate (88)Y from (nat)Sr target material using AG MP-1 resin and AG 50W-X4 resins, respectively. PMID:19299156

van der Meulen, N P; van der Walt, T N; Steyn, G F; Szelecsényi, F; Kovács, Z; Perrang, C M; Raubenheimer, H G

2009-01-01

77

[MyD88 L265P mutation and B cell tumor].  

PubMed

Myeloid differentiation factor (MyD88) is an important adaptor protein mediating the signal tranduction of most Toll-like receptors (TLR), interleukin-1 receptor (IL-1R) and interleukin-18 receptor (IL-18R) that play a key role to mediate innate immune response. Recently, activating of MYD88 L265 mutation has been reported in about of 90% lymphoplasmacytoid lymphoma/Waldenström's Macroglobulinemia, about of 29% activated type diffuse large B-cell lymphoma and other subtypes of B cell tumors demonstrating the MyD88 signaling plays an important role in B cell tumoregenesis, and inhibitors targeting MyD88 might become a new remedy for B cell tumors. In this review, the latest advances in the roles of MyD88 L265P mutation in B cell tumoregenesis were summarized. PMID:24598687

Chen, Hai-Min; Hou, Jian

2014-02-01

78

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

NASA Astrophysics Data System (ADS)

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

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

2012-12-01

79

SOLVENT EXTRACTION CONCENTRATION OF CERTAIN RARE EARTHS IN YTTRIUM  

Microsoft Academic Search

A procedure is given for the concentration of gadolinium, dysprosium, ; and samarium in yttrium oxide by extraction of the thiocyanates with tributyl ; phosphate. Concentration of these elements up to 80-fold was obtained. Results ; are given on the effects of ammonium thiocyanate and tributyl phosphate ; concentrations, as well as pH, temperature, and sample size on the separation.

A. R. Eberle; M. W. Lerner

1957-01-01

80

THE EFFECT OF IMPURITIES ON IRON-CHROMIUM-YTTRIUM ALLOYS  

Microsoft Academic Search

A study was made of the effect of carbon, manganese, oxygen, palladium, ; and sulfur on the structure and fabricability of iron-35 wt.% chronium-1 wt.% ; yttrium alloy. Using a vacuum-induction melting technique each of the additives ; except oxygen was introduced to 1-lb remelts of a single 15-lb master alloy. The ; master alloy and remelts were made under

R. W. Endebrock; W. Chubb; E. L. Foster; R. F. Dickerson

1959-01-01

81

Downstaging Hepatocellular Carcinoma with Yttrium-90 radioembolization: Resection or transplantation?  

PubMed

Trans Arterial Radio Embolization with Yttrium 90 in the treatment of Hepatocellular Carcinoma is becoming a new interesting tool in the treatment of patients that are considered non resectable and non transplantable. A successful downstaging could improve the number of patients that could benefit from a resection or a liver transplantation, but some points still need to be addressed. PMID:24572481

Ettorre, G M; Laurenzi, A; Vennarecci, G

2014-06-01

82

Synthesis of yttrium iron garnet precursor particles by homogeneous precipitation  

Microsoft Academic Search

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

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

1996-01-01

83

Synthesis and characterization of yttrium iron garnet nanoparticles  

SciTech Connect

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

Vaqueiro, P.; Lopez-Quintela, M.A. [Universidad de Santiago de Compostela (Spain)] [Universidad de Santiago de Compostela (Spain); Crosnier-Lopez, M.P. [Universite du Maine, Le Mans (France)] [Universite du Maine, Le Mans (France)

1996-11-01

84

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

In the Orbiter Processing Facility Bay 1, STS-88 Commander Robert D. Cabana watches from inside Space Shuttle orbiter Endeavour as worker Tracey Hackett cleans the outside of a window. The STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT), familiarizing themselves with the orbiter's midbody and crew compartments. Targeted for liftoff on Dec. 3, 1998, STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

85

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

In the Orbiter Processing Facility Bay 1, STS-88 Commander Robert D. Cabana makes a visual inspection of the windows on Space Shuttle orbiter Endeavour. The STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT), familiarizing themselves with the orbiter's midbody and crew compartments. Targeted for liftoff on Dec. 3, 1998, STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

86

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

Inside the Orbiter Processing Facility Bay 1, STS-88 Mission Specialists Sergei Krikalev (left), a Russian cosmonaut; and James H. Newman look over equipment for their upcoming flight. The STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT), familiarizing themselves with the orbiter's midbody and crew compartments. Targeted for liftoff on Dec. 3, 1998, STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. The first major U.S.- built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

87

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

Inside Space Shuttle orbiter Endeavour in the Orbiter Processing Facility Bay 1, workers James Neilhouse (left) and Melissa Groening (right) watch while STS-88 Mission Specialists James H. Newman (second from left) and Sergei Krikalev, a Russian cosmonaut, check overhead equipment. STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT), familiarizing themselves with the orbiter's midbody and crew compartments. Targeted for liftoff on Dec. 3, 1998, STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

88

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

Inside the payload bay of Space Shuttle orbiter Endeavour in Orbiter Processing Facility Bay 1, STS-88 Mission Specialists Jerry L. Ross (crouching at left) and James H. Newman (far right) get a close look at equipment. Looking on is Wayne Wedlake (far left), with United Space Alliance at Johnson Space Center, and a KSC worker (behind Newman) who is operating the movable work platform or bucket. The STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT), familiarizing themselves with the orbiter's midbody and crew compartments. Targeted for liftoff on Dec. 3, 1998, STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. After the mating, Ross and Newman are scheduled to perform three spacewalks to connect power, data and utility lines and install exterior equipment. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

89

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

In the Orbiter Processing Facility Bay 1, STS-88 Pilot Frederick W. Sturckow makes a visual inspection of windows on the Space Shuttle orbiter Endeavour. The STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT), familiarizing themselves with the orbiter's midbody and crew compartments. Targeted for launch on Dec. 3, 1998, STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

90

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

In the Space Station Processing Facility, STS-88 Mission Specialists Sergei Krikalev (left), a Russian cosmonaut; James H. Newman (center); and Jerry L. Ross conduct a sharp-edge inspection of the Unity connecting module, which is the primary payload on their upcoming mission. The STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT), familiarizing themselves with the orbiter's midbody and crew compartments. Targeted for liftoff on Dec. 3, 1998, STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

91

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

92

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

Lowered on a movable work platform or bucket inside the payload bay of orbiter Endeavour, STS-88 Mission Specialists Jerry L. Ross (far right) and James H. Newman (second from right) get a close look at the Orbiter Docking System. At left is the bucket operator and Wayne Wedlake, with United Space Alliance at Johnson Space Center. The STS-88 crew members are in Orbiter Processing Facility Bay 1 to participate in a Crew Equipment Interface Test (CEIT) to familiarize themselves with the orbiter's midbody and crew compartments. Targeted for liftoff on Dec. 3, 1998, STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. While on orbit during STS-88, Unity will be latched atop the Orbiter Docking System in the forward section of Endeavour's payload bay for the mating of the two modules. After the mating, Ross and Newman are scheduled to perform three spacewalks to connect power, data and utility lines and install exterior equipment. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

93

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

PubMed Central

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

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

2013-01-01

94

21 CFR 520.88d - Amoxicillin trihydrate soluble powder.  

Code of Federal Regulations, 2010 CFR

... false Amoxicillin trihydrate soluble powder. 520.88d Section 520.88d Food...88d Amoxicillin trihydrate soluble powder. (a) Specifications. Each gram... Administer by drench or by mixing in milk. Treatment should be...

2010-04-01

95

21 CFR 520.88d - Amoxicillin trihydrate soluble powder.  

Code of Federal Regulations, 2013 CFR

... false Amoxicillin trihydrate soluble powder. 520.88d Section 520.88d Food...88d Amoxicillin trihydrate soluble powder. (a) Specifications. Each gram... Administer by drench or by mixing in milk. Treatment should be...

2013-04-01

96

21 CFR 520.88d - Amoxicillin trihydrate soluble powder.  

Code of Federal Regulations, 2010 CFR

... false Amoxicillin trihydrate soluble powder. 520.88d Section 520.88d Food...88d Amoxicillin trihydrate soluble powder. (a) Specifications. Each gram... Administer by drench or by mixing in milk. Treatment should be...

2009-04-01

97

42 CFR 88.15 - Appeals regarding treatment.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Appeals regarding treatment. 88.15 Section 88.15 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT...ACTIVITIES WORLD TRADE CENTER HEALTH PROGRAM § 88.15 Appeals regarding treatment. (a)...

2012-10-01

98

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

99

28 CFR 115.88 - Data review for corrective action.  

Code of Federal Regulations, 2013 CFR

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

2013-07-01

100

29 CFR 1918.88 - Log operations.  

Code of Federal Regulations, 2013 CFR

...LONGSHORING Handling Cargo § 1918.88 Log operations. (a) Working in holds. When loading logs into the holds of vessels and using dumper...walking and working surface and that is used in the loading of logs onto vessels from the water....

2013-07-01

101

Permittivity increase of yttrium-doped HfO2 through structural phase transformation  

NASA Astrophysics Data System (ADS)

An approach to control the dielectric properties of hafnium-based oxide films with an intentional structural phase transformation was proposed and demonstrated. Yttrium serves effectively as a dopant to induce a phase transformation from the monoclinic to the cubic phase even at 600 °C. The yttrium-doped HfO2 films show higher permittivity than undoped HfO2, and the permittivity as high as 27 is obtained by 4 at. % yttrium doping. The permittivity enhancement by yttrium doping can be explained by the shrinkage of molar volume due to the structural phase transformation. The advantage of yttrium doping is more pronounced at higher temperatures, since the permittivity of undoped HfO2 is reduced significantly, whereas that of 17 at. % yttrium-doped film shows no change even at 1000 °C.

Kita, Koji; Kyuno, Kentaro; Toriumi, Akira

2005-03-01

102

Polymerization of Vinyl Ether by Use of Yttrium Silicate Gel as Solid Acid  

Microsoft Academic Search

The gel of yttrium silicate was utilized as a solid catalyst for the polymerization of vinyl ethers. Several silicate gels showing the different element ratios of silicon and yttrium were prepared by the co-gelation of sodium metasilicate and yttrium(III) chloride from an acidic aqueous solution through neutralization by an aqueous ammonia. The polymerizations of ethyl vinyl ether and n-butyl vinyl

Osamu Moriya; Toshio Sugizaki; Atsuko Kamejima; Ken Iwakura; Takeo Kumon; Toshifumi Kageyama

2006-01-01

103

Trivalent zirconium and hafnium ions in yttrium oxide ceramics  

NASA Astrophysics Data System (ADS)

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

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

2014-05-01

104

Vibrations produced during erbium:yttrium–aluminum–garnet laser irradiation  

Microsoft Academic Search

The purpose of this study was to evaluate vibrations induced by an erbium:yttrium–aluminum–garnet (Er:YAG) laser in the non-contact\\u000a mode and compare the vibrations with different pulse durations and energy parameters. The experiment was conducted on an extracted\\u000a tooth built up in silicone impression material. The vibrations were measured by piezoelectric accelerometer for a super-short\\u000a pulse (SSP), a very short pulse

Ivica Anic; Ivana Miletic; Silvana Jukic Krmek; Josipa Borcic; Sonja Pezelj-Ribaric

2009-01-01

105

Tunnel junctions with yttrium oxide barrier and various ferromagnetic electrodes  

Microsoft Academic Search

This work concerns tunnel junctions with yttrium oxide barrier prepared by plasma oxidation of a 1.5-nm Y film. The magnetoresistive properties of the junctions were studied as a function of the ferromagnetic (FM) electrodes in contact with the barrier, such as CoFe, Py (permalloy), and CoFeNiSiB. The maximum measured tunnel magnetoresistance (TMR) effect was 25% at room temperature -raised to

Theodoros Dimopoulos; Günter Gieres; Silviu Colis; Ricardo Lopez; Michael Vieth; Joachim Wecker; Yuansu Luo; Konrad Samwer

2004-01-01

106

Laser shocks on yttrium sesquioxide ceramics. Non stoichiometry phenomena  

SciTech Connect

The thermal behavior of yttrium sesquioxide ceramics under a CO{sub 2} laser in the air and under a YAG laser in ultra high vacuum conditions is followed by scanning electron microscopy and Raman spectroscopy. The stability of the C cubic phase of Y{sub 2}O{sub 3} is discussed. Non stoichiometry defects are revealed by Raman spectroscopy using an infrared exciting wavelength.

Husson, E.; Proust, C. [Univ. d` Orleans et CRPHT-CNRS, Orleans (France). Lab. de Physique et Mecanique des Materiaux] [Univ. d` Orleans et CRPHT-CNRS, Orleans (France). Lab. de Physique et Mecanique des Materiaux

1995-02-01

107

Thermographic Study of Some Basic Salts of Scandium and Yttrium.  

National Technical Information Service (NTIS)

Sc(OH)/sub 2.32/(SO sub 4 )/sub 0.34/, Y(OH) sub 2 (SO sub 4 )/sub 0.5/, Y(OH)/sub 2.6/Cl/sub 0.4/, and Y(OH)/sub 2.6/(NO sub 3 )/sub 0.4/ were studied for the first time by thermogravimetry. Scandium and yttrium hydroxide have weakly and strongly bound w...

N. V. Mal'kevich N. N. Mironov

1970-01-01

108

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

Microsoft Academic Search

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

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

1998-01-01

109

Gibbs energies of formation of hydroxides of lanthanides and yttrium  

Microsoft Academic Search

The pH values of the formation of hydrates in solutions of yttrium(III), cerium(III), samarium(III), europium(III), erbium(III), and ytterbium(III) were determined by conductometric titration. The solubility products and Gibbs energies of formation for hydroxides for the elements listed were calculated. The average Gibbs energy of dissolution for lanthanide hydroxides was found to be approximately 149.83 ± 0.90 kJ\\/mol. The Gibbs energies

D. E. Chirkst; O. L. Lobacheva; I. V. Berlinskii

2010-01-01

110

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

111

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

As the bucket operator (left) lowers them into the open payload bay of the orbiter Endeavour, STS-88 Mission Specialists Jerry L. Ross (second from left) and James H. Newman (second from right) do a sharp-edge inspection. At their right is Wayne Wedlake, with United Space Alliance at Johnson Space Center. Below them is the Orbiter Docking System, the remote manipulator system arm and a tunnel into the payload bay. The STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT), familiarizing themselves with the orbiter's midbody and crew compartments. Targeted for liftoff on Dec. 3, 1998, STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. After the mating, Ross and Newman are scheduled to perform three spacewalks to connect power, data and utility lines and install exterior equipment. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

112

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

Inside the payload bay of Space Shuttle orbiter Endeavour, workers and STS-88 crew members on a movable work platform or bucket move closer to the rear of the orbiter's crew compartment. While Endeavour is being prepared for flight inside Orbiter Processing Facility Bay 1, the STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT) to familiarize themselves with the orbiter's midbody and crew compartments. A KSC worker (left) maneuvers the platform to give Mission Specialists Jerry L. Ross and James H. Newman (right) a closer look. Looking on is Wayne Wedlake of United Space Alliance at Johnson Space Center. Targeted for liftoff on Dec. 3, 1998, STS-88 will be the first Space Shuttle launch for assembly of the International Space Station (ISS). The primary payload is the Unity connecting module which will be mated to the Russian-built Zarya control module, expected to be already on orbit after a November launch from Russia. After the mating, Ross and Newman are scheduled to perform three spacewalks to connect power, data and utility lines and install exterior equipment. The first major U.S.-built component of ISS, Unity will serve as a connecting passageway to living and working areas of the space station. Unity has two attached pressurized mating adapters (PMAs) and one stowage rack installed inside. PMA-1 provides the permanent connection point between Unity and Zarya; PMA-2 will serve as a Space Shuttle docking port. Zarya is a self-supporting active vehicle, providing propulsive control capability and power during the early assembly stages. It also has fuel storage capability.

1998-01-01

113

Elaboration et caracterisation de poudres d'oxyde d'yttrium et d'oxyde d'hafnium par procedes sol-gel. (Elaboration and characterisation of yttrium oxide and hafnium oxide powders by the sol-gel process).  

National Technical Information Service (NTIS)

The two classical sol-gel processes, colloidal and polymeric are studied for the preparation of yttrium oxide and hafnium oxide high performance powders. In the colloidal process, controlled and reproducible conditions for the preparation of yttrium oxide...

T Hours

1988-01-01

114

Formation and Property of Yttrium and Yttrium Silicide Films as Low Schottcky Barrier material for n-Type Silicon  

Microsoft Academic Search

As the candidate for the low Schottky barrier material for n-type silicon, physical and electrical properties of yttrium and its silicide were investigated. In order to prevent both Si surface and easily-oxidized low work function metals from being oxidized, N2 sealed cleaning and transfer system and capping layer on low work function metals were employed. Fabricated Al\\/Y\\/p-type silicon Schottky barrier

Tatsunori Isogai; Hiroaki Tanaka; Tetsuya Goto; Akinobu Teramoto; Shigetoshi Sugawa; Tadahiro Ohmi

2008-01-01

115

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 35MeV ?-particles at a beam current of 15?A. The thick source production yield of (89)Zr is ~3.1MBq?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

116

CAP88 PC Tritium Ingestion Model Inconsistencies  

SciTech Connect

CAP88 PC is the Environmental Protection Agency (EPA) code approved for demonstrating compliance with National Emission Standard for Hazardous Pollutants (NESHAP) 40 CFR Part 61. A detailed look at the dose methodology for tritium revealed that there are several inconsistencies in the ingestion model when compared with the ingestion model for other radionuclides within the code. The inconsistencies include use of an out-dated tritium ingestion dose conversion factor and hard coding of out-dated food consumption parameters for tritium. Correction of these values could result in approximately a 50 percent reduction in dose from tritium for certain cases.

Simpkins, A.A.

2001-02-26

117

Giant Dipole Resonance decay of hot rotating 88Mo  

NASA Astrophysics Data System (ADS)

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

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

2014-03-01

118

High-spin states in ^88Kr  

NASA Astrophysics Data System (ADS)

High-spin states in ^88Kr have been studied following the fission of the ^226Th compound nucleus formed in a fusion-evaporation reaction (^18O at 91 MeV on ^208Pb). The Gammasphere array was used to detect ?-ray coincidences. High-spin states up to spin (14^+) and ˜8 MeV excitation energy have been established. The level scheme reported for ^88Kr in the spontaneous fission of ^248Cm [1] has been enriched and extended to higher spin and excitation energies. Differences between the level scheme reported in [1] and that obtained in the present work will be discussed. The observed experimental states are also compared with theoretical shell-model and interacting-boson-model-2 calculations. This work has been supported by the U.S. Department of Energy under Contracts No. DE-AC52-06NA25396 (LANL), W-7405-ENG-48 (LLNL) and AC03-76SF00098 (LBNL) and by the National Science Foundation (Rutgers). [1] T. Rzaca-Urban et al., Eur. Phys. J. A 9, 165 (2000).

Fotiades, N.; Lisetskiy, A. F.; Cizewski, J. A.; Krücken, R.; Clark, R. M.; Fallon, P.; Lee, I. Y.; Macchiavelli, A. O.; Becker, J. A.; Younes, W.

2007-10-01

119

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

120

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

PubMed

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

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

2009-08-01

121

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

122

Atomic force microscopy studies of twins in yttrium-doped barium titanate  

Microsoft Academic Search

Barium titanate is the main constituent of PTC materials and their electric properties are sensitive to microstructure and defects, in atomic scale, that are significantly affected by processing parameters. The microstructure of barium titanate doped with yttrium was investigated using topographic images obtained by AFM in contact mode. The AFM images of barium titanate doped with yttrium showed the effect

Simoni Maria Gheno; Haroldo Lhou Hasegawa; Pedro Iris Paulin Filho

2006-01-01

123

Structural and photoluminescent characteristics of yttrium–aluminum oxide films doped with Tb, Eu or Ce  

Microsoft Academic Search

The structural and room temperature luminescent characteristics of rare earth doped yttrium–aluminum oxide films deposited by the spray pyrolysis technique at low temperatures have been studied as a function of the deposition parameters such as substrate temperature and dopant concentration. The spraying solution is prepared by mixing yttrium and aluminum chlorides in water, and the incorporation of the rare earth

A. Esparza; M Garcia; C Falcony

1998-01-01

124

[Hygienic regulation of yttrium, terbium, ytterbium and lutetium fluorides in the air of the workplace].  

PubMed

The study (experiments on animals and on culture of rats' peritoneal macrophages) covered fluorides of rare-earth metals (REM) assigned to yttrium group--yttrium, terbium, ytterbium, lutetium. Fluorides of REM have low toxicity and cumulativity, induce no local irritation of skin and eyes. Fluorides of yttrium, terbium and lutetium, if administered into stomach, result in specific intoxication (fluorosis). Fluoride of ytterbium did not cause such intoxication. According to short-term tests of cytotoxicity, the foreseeable fibrogenic danger for ytterbium fluoride is moderate, for fluorides of yttrium, terbium and lutetium is mild. The authors recommend to control the level of yttrium, terbium and lutetium fluorides in the air of workplace through the MACs for the fluorides at 2.5 mg/cu m (maximal single concentration) and 0.5 mg/cu m (average shift concentration), the level of ytterbium fluoride as moderate fibrogenic dust at 6 mg/cu m. PMID:7881860

Neizvestnova, E M; Grekhova, T D; Privalova, L I; Babakova, O M; Konovalova, N E; Petelina, E V

1994-01-01

125

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

126

Acta ophthalmologica: history 1970-88.  

PubMed

This is my personal memories concerning the Nordic periodical Acta Ophthalmologica in the period 1970-88. Poul Braendstrup was scientific secretary for Acta 1950-70 and chief editor 1970-75. His many important scientific works and enormous work for Acta is described, but also personal topics are mentioned. Acta meetings in the Danish Ophthalmol Society (DOS) and in the Nordic ophtalmol. Congresses are discussed. A referee-system is established from 1976, but with political contra scientific motives. Only a few papers arrived to Acta. A catastrophe in 1978 is mentioned. The new secretary Ingelise Truberg did an enormous work for the next ten years. Erik Jørgensen (1928-90) was our printer, and from 1975 our idealistic publisher after Munksgaard. The economy became better and the number of papers of high quality increased. The relationship to the new Nordic periodical Oftalmolog was discussed in 1982. PMID:25043789

Norn, Mogens

2014-08-01

127

An Analysis of the "Blizzard of '88".  

NASA Astrophysics Data System (ADS)

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

Kocin, Paul J.

1983-11-01

128

On the use of hydrogen peroxide as a masking agent for the determination of yttrium in uranium oxide-yttrium oxide mixture  

Microsoft Academic Search

Use of hydrogen peroxide as a masking agent for uranium during the EDTA titration of yttrium in an yttrium-uranium mixture\\u000a containing large amounts of uranium has been investigated. High acetate ion concentration was necessary to keep the peroxy\\u000a complex of uranium in solution during the titration. It has been observed that upto 500 mg of uranium could be tolerated in

R. K. Rastogi; N. K. Chaudhuri; G. H. Rizvi; M. S. Subramanian

1985-01-01

129

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

PubMed

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

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

2014-04-24

130

36 CFR 9.88 - Permit modification, suspension, and cancellation.  

Code of Federal Regulations, 2013 CFR

36 Parks, Forests, and Public Property 1 2013-07-01... 9.88 Section 9.88 Parks, Forests, and Public Property NATIONAL PARK...sent by certified mail within three (3) working days confirming and explaining...

2013-07-01

131

40 CFR 725.88 - Uses of a microorganism.  

Code of Federal Regulations, 2013 CFR

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

2013-07-01

132

38 CFR 4.88a - Chronic fatigue syndrome.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Chronic fatigue syndrome. 4.88a Section...Nutritional Deficiencies § 4.88a Chronic fatigue syndrome. (a) For VA purposes, the diagnosis of chronic fatigue syndrome requires: (1)...

2010-07-01

133

38 CFR 4.88a - Chronic fatigue syndrome.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Chronic fatigue syndrome. 4.88a Section...Nutritional Deficiencies § 4.88a Chronic fatigue syndrome. (a) For VA purposes, the diagnosis of chronic fatigue syndrome requires: (1)...

2011-07-01

134

Joining of mullite ceramics with yttrium aluminosilicate glass interlayers  

Microsoft Academic Search

Pellets of yttrium aluminosilicate glass (Y2O3:Al2O3:SiO2=30:20:50mol%) powder were used as the filler interlayers (0.4mm thick) to join two mullite substrates. The glass interlayer partially melted at joining temperature to bond the substrates and then crystallized during cooling to have better bonding strength. The results showed that joining could be performed at 1390–1420°C for 1–5h with applied pressure of 0.02MPa. After

Yung-Jen Lin; Shin-Hua Tu

2009-01-01

135

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

136

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

137

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

138

Synchronization of chaos in circular yttrium iron garnet films  

SciTech Connect

The results of the synchronization of two ferromagnetic resonance signals are presented. In the experiment, a thin yttrium iron garnet (YIG) film was placed in the perpendicular resonance configuration and the bias field, rf power, and frequency were chosen so that the rf absorption of the YIG sample was chaotic. A segment of this chaotic signal was stored into memory. The goal was to induce the sample to synchronize to its prerecorded output through a perturbation applied to a system parameter. The results of these synchronization experiments were predicted by a numerical model. {copyright} {ital 1996 American Institute of Physics.}

Peterman, D.W.; Ye, M.; Wigen, P.E. [Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)] [Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)

1996-04-01

139

Magnetostatic mode suppression in layered Yttrium Iron Garnet films  

SciTech Connect

A novel approach to the suppression of magnetostatic modes in layered Ca-doped/pure yttrium iron garnet (YIG) films is presented. By properly selecting the position and width of the broad background signal excited in the Ca: YIG layer, the magnetostatic spectrum of the coupled pure YIG can be drastically modified. In particular, selecting a proper calcium concentration of the damping layer, an entire surface or volume mode band can be suppressed. In this paper, experimental results for double-layered films are reported. An extension to triple-layered films, allowing the total suppression of all modes but one, is also proposed.

De Gasperis, P.; DiGregorio, C.; Miccoli, G.; Roveda, R.

1984-09-01

140

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

141

Gibbs energies of formation of hydroxides of lanthanides and yttrium  

Microsoft Academic Search

The pH values of the formation of hydrates in solutions of yttrium(III), cerium(III), samarium(III), europium(III), erbium(III),\\u000a and ytterbium(III) were determined by conductometric titration. The solubility products and Gibbs energies of formation for\\u000a hydroxides for the elements listed were calculated. The average Gibbs energy of dissolution for lanthanide hydroxides was\\u000a found to be approximately 149.83 ± 0.90 kJ\\/mol. The Gibbs energies

D. E. Chirkst; O. L. Lobacheva; I. V. Berlinskii

2010-01-01

142

Gibbs energies of formation of hydroxides of lanthanides and yttrium  

NASA Astrophysics Data System (ADS)

The pH values of the formation of hydrates in solutions of yttrium(III), cerium(III), samarium(III), europium(III), erbium(III), and ytterbium(III) were determined by conductometric titration. The solubility products and Gibbs energies of formation for hydroxides for the elements listed were calculated. The average Gibbs energy of dissolution for lanthanide hydroxides was found to be approximately 149.83 ± 0.90 kJ/mol. The Gibbs energies of formation for hydroxides of the remaining lanthanides were assessed on this basis.

Chirkst, D. E.; Lobacheva, O. L.; Berlinskii, I. V.

2010-12-01

143

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

PubMed Central

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

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

2013-01-01

144

Ring tensile test of modified Halthane 88-2  

Microsoft Academic Search

Seven adhesives, designated Halthanes, have been developed at the Lawrence Livermore National Laboratory. This research deals with the stress-strain behavior of Halthane 88-2 and a surfactant modified version of this adhesive as a function of aging time and temperature. The urethane adhesive, Halthane 88-2, consists of prepolymer 88, curing agent XU-205, FC-430, with 88\\/12\\/0.25 weight ratio, respectively. Ring tensile measurements

Chiu

1983-01-01

145

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

PubMed

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

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

2012-07-01

146

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

147

42 CFR 408.88 - Refund of group payments.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Refund of group payments. 408.88 Section 408.88 Public...SUPPLEMENTARY MEDICAL INSURANCE Direct Remittance: Group Payment § 408.88 Refund of group payments. (a) Basis for refund....

2013-10-01

148

10 CFR 71.88 - Air transport of plutonium.  

Code of Federal Regulations, 2010 CFR

...2009-01-01 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...

2009-01-01

149

10 CFR 71.88 - Air transport of plutonium.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 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...

2010-01-01

150

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

151

26 CFR 1.88-1 - Nuclear decommissioning costs.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 false Nuclear decommissioning costs. 1.88-1...Included in Gross Income § 1.88-1 Nuclear decommissioning costs. (a) In general...Section 88 provides that the amount of nuclear decommissioning costs directly or...

2013-04-01

152

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

153

36 CFR 7.88 - Indiana Dunes National Lakeshore.  

Code of Federal Regulations, 2010 CFR

...Property 1 2009-07-01 2009-07-01 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...

2009-07-01

154

4 CFR 28.88 - Board procedures; enforcement.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 false Board procedures; enforcement. 28.88 Section 28.88 Accounts...Review § 28.88 Board procedures; enforcement. (a) All decisions and orders...General Counsel may petition the Board for enforcement of a final decision of the...

2011-01-01

155

An inductively coupled plasma mass spectrometry method for the quantification of yttrium-antibody based drugs using stable isotope tracing.  

PubMed

Targeted radioimmunotherapy has been recently clinically validated and approved for the treatment of cancer by the US Food and Drug Administration. This therapeutic approach employs monoclonal antibodies directed to cancer-related, cell-surface antigens coupled to beta-emitting nuclides. 90Y is one of the most useful radioisotopes in the development of antibody based radioimmunotherapy and evaluation of the pharmacokinetic profile for 90Y-radiopharmaceuticals is usually performed by radiochemical methods. In this work we have developed an alternative radioactive-free approach to evaluate pharmacokinetic profiles based on the inductively coupled plasma mass spectrometric (ICP-MS) quantification of 89Y. A highly sensitive and rapid method for the determination of yttrium in urine is described and applied to evaluate the urinary clearance of antibody-based drugs labeled with the stable isotope of yttrium, 89Y. This approach overcomes some important limitations for pre-clinical radioanalytical methods such as radiation hazards and radioactive waste disposal. Method development was performed by determining detection and quantification limits, and precision as repeatability and trueness. These performance parameters fulfilled the acceptance criteria for bioanalytical methods. PMID:17590870

Ciavardelli, Domenico; D'Anniballe, Gaetano; Nano, Giuseppe; Martin, Franck; Federici, Giorgio; Sacchetta, Paolo; Di Ilio, Carmine; Urbani, Andrea

2007-01-01

156

Nanoscale fullerene compression of an yttrium carbide cluster.  

PubMed

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

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

2012-05-23

157

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

158

Yttrium oxide based three dimensional metamaterials for visible light cloaking  

NASA Astrophysics Data System (ADS)

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

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

2014-04-01

159

Ion beam induced luminescence of doped yttrium compounds  

NASA Astrophysics Data System (ADS)

Rare earth doped yttrium oxide (yttria) and silicate, Y 2O 3:Eu and Y 2SiO 5:Tb, are the most promising phosphors for advanced devices such as flat panel field-emission-displays. However, their light yield for electron excitation has proven to be lower than that predicted by early models. New experimental data are needed to improve the theoretical understanding of the cathodoluminescence (CL) that will, in turn, lead to materials that are significantly brighter. Beside the existing CL and photo luminescence (PL) measurements, one can provide new information by studying ion-induced luminescence (IL). Ions penetrate substantially deeper than electrons and their light yield should therefore not depend on surface effects. Moreover, the energy density released by ions can be much higher than that of electrons and photons, which results in possible saturation effects, further testing the adequacy of models. We exposed the above yttrium compounds to three ion beams, H (3 MeV), C (20 MeV), Cu (50 MeV), which have substantially different electronic stopping powers. H was selected to provide an excitation close to CL, but without surface effects. The C and Cu allowed an evaluation of saturation effects because of their higher stopping powers. The IL experiments involved measuring the transient light intensity signal radiating from thin phosphor layers following their exposure to ˜200 ns ion beam pulses. We present the transient yield curves for the two materials and discuss a general model for this behavior.

Rossi, P.; Brice, D. K.; Seager, C. H.; McDaniel, F. D.; Vizkelethy, G.; Doyle, B. L.

2004-06-01

160

Magnetism in Mo-doped Yttrium Iron Garnet  

NASA Astrophysics Data System (ADS)

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

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

2013-03-01

161

Thin film sputtering of gadolinium and chromium-doped yttrium aluminum garnet  

NASA Astrophysics Data System (ADS)

In this work, rf magnetron reactive sputtering was used to synthesize yttrium aluminum garnet (YAG) thin films at relatively low temperature and short processing period. A combination of 80W for yttrium target, 130W for aluminum target, and a total pressure of 3 mTorr gas mixtures with 25 sccm argon and 1.4 sccm oxygen flow rate produced a Y3Al5 O12 stoichiometric thin film. Gadolinium and chromium-doped YAG thin films were synthesized in a combinatorial fashion. The combinatorial thin film sputtering technique rapidly determined the gadolinium and chromium concentration that yielded the optimum luminescence intensity to be ˜5.5 at% for YAG:Gd and ˜0.69 at% YAG:Cr films, respectively. The concentration quenching phenomena were discussed. A 23 full factorial design of experiments (DOE) was conducted to investigate the effects of substrate temperature, substrate bias, and oxygen flow rate on the luminescence properties and the crystallinity of YAG:Gd and YAG:Cr thin films, respectively. DOE results showed that increasing O2 flow rate decreases both luminescence intensity and film crystallinity, substrate temperature slightly improves luminescence and has a negligible effect on crystallinity, and substrate bias enhances luminescence but decreases crystallinity. The effects of the parameters were thoroughly interpreted by correlating the composition and morphology of the films. Single factor studies for each variable verified the DOE results. The optimum process condition consists if low O 2 flow rate and high substrate bias. The effect of total pressure of the Ar/O2 gas mixture on CL efficiency and XRD intensity was also investigated. The PL temperature dependence of YAG:Gd and YAG:Cr thin films were studied in a temperature range of 15-298 K. The thermal quenching phenomena were observed above ˜110K on both YAG:Gd and YAG:Cr films. Activation energies of 24.7 meV and 25.2 meV were estimated for YAG:Gd and YAG:Cr films, respectively. Both activation energies were attributed to electron-phonon coupling.

Deng, Yuepeng

162

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

PubMed

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

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

2013-11-01

163

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

PubMed

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

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

2013-11-01

164

The behaviour of selected yttrium containing bioactive glass microspheres in simulated body environments  

Microsoft Academic Search

The study aims at the manufacture and investigation of biodegradable glass microspheres incorporated with yttrium potentially\\u000a useful for radionuclide therapy of cancer. The glass microspheres in the SiO2–Na2O–P2O5–CaO–K2O–MgO system containing yttrium were prepared by conventional melting and flame spheroidization. The behaviour of the yttrium\\u000a silicate glass microspheres was investigated under in vitro conditions using simulated body fluid (SBF) and Tris

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

2008-01-01

165

Nickel hexa-yttrium deca-iodide, [NiY6]I10  

PubMed Central

Comproportionation reactions of yttrium triiodide, yttrium and nickel led to the formation of the compound [NiY6]I10, which is isostructural with the prototypical [RuY6]I10. In particular, [NiY6]I10 is composed of isolated nickel centered yttrium octa­hedra (site symmetry -1) that are further surrounded by iodide ligands to construct a three-dimensional cluster complex framework. Although this compound has been previously detected by powder X-ray diffraction techniques [Payne & Corbett (1990 ?). Inorg. Chem. 29, 2246–2251], details of the crystal structure for triclinic [NiY6]I10 were not provided.

Steinberg, Simon; Meyer, Gerd

2014-01-01

166

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

167

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

NASA Astrophysics Data System (ADS)

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

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

1986-03-01

168

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

PubMed Central

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

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

2000-01-01

169

Nickel hexa-yttrium deca-iodide, [NiY6]I10.  

PubMed

Comproportionation reactions of yttrium triiodide, yttrium and nickel led to the formation of the compound [NiY6]I10, which is isostructural with the prototypical [RuY6]I10. In particular, [NiY6]I10 is composed of isolated nickel centered yttrium octa-hedra (site symmetry -1) that are further surrounded by iodide ligands to construct a three-dimensional cluster complex framework. Although this compound has been previously detected by powder X-ray diffraction techniques [Payne & Corbett (1990 ?). Inorg. Chem. 29, 2246-2251], details of the crystal structure for triclinic [NiY6]I10 were not provided. PMID:24940186

Steinberg, Simon; Meyer, Gerd

2014-06-01

170

Somatic mutations in MYD88 and CXCR4 are determinants of clinical presentation and overall survival in Waldenstrom macroglobulinemia.  

PubMed

Whole genome sequencing has revealed activating somatic mutations in MYD88 (L265P) and CXCR4 in Waldenström macroglobulinemia (WM). CXCR4 somatic mutations in WM are the first ever reported in human cancer and are similar to nonsense (NS) and frameshift (FS) germline mutations found in warts, hypogammaglobulinemia, infections and myelokathexis (WHIM) syndrome. We genotyped lymphoplasmacytic cells from 175 WM patients and observed significantly higher bone marrow (BM) disease involvement, serum immunoglobulin-M levels, and symptomatic disease requiring therapy, including hyperviscosity syndrome in those patients with MYD88(L265P)CXCR4(WHIM/NS) mutations (P < .03). Patients with MYD88(L265P)CXCR4(WHIM/FS) or MYD88(L265P)CXCR4(WILDTYPE (WT)) had intermediate BM and serum immunoglobulin-M levels; those with MYD88(WT)CXCR4(WT) showed lowest BM disease burden. Fewer patients with MYD88(L265P) and CXCR4(WHIM/FS or NS) vs MYD88(L265P)CXCR4(WT) presented with adenopathy (P < .01), further delineating differences in disease tropism based on CXCR4 status. Neither MYD88 nor CXCR4 mutations correlated with SDF-1a (RS1801157) polymorphisms in 54 patients who were genotyped for these variants. Unexpectedly, risk of death was not impacted by CXCR4 mutation status, but by MYD88(WT) status (hazard ratio 10.54; 95% confidence interval 2.4-46.2, P = .0018). Somatic mutations in MYD88 and CXCR4 are important determinants of clinical presentation and impact overall survival in WM. Targeted therapies directed against MYD88 and/or CXCR4 signaling may provide a personalized treatment approach to WM. PMID:24553177

Treon, Steven P; Cao, Yang; Xu, Lian; Yang, Guang; Liu, Xia; Hunter, Zachary R

2014-05-01

171

Combining yttrium 90-labeled ibritumomab tiuxetan with high-dose chemotherapy and stem cell support in patients with relapsed non-Hodgkin's lymphoma.  

PubMed

Targeted radioimmunotherapy, including yttrium 90-labeled ibritumomab tiuxetan (Zevalin) and iodine I 131 tositumomab (Bexxar), has the potential to increase the cure rate for patients with CD20+ B-cell malignancies who are undergoing autologous hematopoietic stem cell transplantation. The results of phase I and II trials suggest that radioimmunoconjugates can be safely combined with high-dose chemotherapy, although the optimal approach remains to be established. This review focuses on the use of 90Y ibritumomab tiuxetan combined with high-dose chemotherapy in the setting of autologous hematopoietic stem cell transplantation. PMID:15498146

Winter, Jane N

2004-10-01

172

Pulsed laser ablation deposition of yttrium iron garnet and cerium-substituted YIG films  

NASA Astrophysics Data System (ADS)

Yttrium iron garnet (YIG) thin films were grown on gadolinium gallium garnet substrates using pulsed laser ablation deposition (PLAD) with a XeCl excimer laser. Films were grown up to over 2 ?m thick, however cracking proved to be a problem for films over 1 ?m thick. The lattice parameter(s) of the films and the substrates were measured and indicated that the film/substrate structure was bending to accommodate strain due to the lattice mismatch. The films had saturation magnetisation values close to that of bulk YIG and were isotropic in the film plane. The magnetisation data also indicate stress-induced uniaxial isotropy. The ablation conditions were varied to produce uncracked films with low droplet densities. YIG melts incongruently during the laser ablation process and cone-like structures form on the ablation target lowering the ablation rates. Cerium-substituted YIG films were also grown in both oxygen and argon atmospheres, substituting cerium into YIG increases the lattice parameter and hence reduces the strain. The Ce-YIG film grown in argon was greenish indicating that cerium was in the desired oxidation state.

Ibrahim, N. B.; Edwards, C.; Palmer, S. B.

2000-10-01

173

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

PubMed

Since lasers were introduced in dentistry, there has been considerable advancement in technology. Several wavelengths have been investigated as substitutes for high-speed air turbine. Owing to its high absorbability in water and hydroxyapatite, the erbium:yttrium-aluminum-garnet (Er:YAG) laser has been of great interest among dental practitioners and scientists. In spite of its great potential for hard tissue ablation, Er:YAG laser effectiveness and safety is directly related to an adequate setting of the working patterns. It is assumed that the ablation rate is influenced by certain conditions, such as water content of the target tissue, and laser parameters. It has been shown that Er:YAG irradiation with water coolant attenuates temperature rise and, hence, minimizes the risk of thermally induced pulp injury. It also increases ablation efficiency and enhances adhesion to the lased dental tissue. The aim of this review was to obtain insights into the ablation process and to discuss the effects of water flow on dental tissue ablation using Er:YAG laser. PMID:18425563

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

2009-09-01

174

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

175

Spatio-Temporal Chaos in Yttrium Iron Garnet Films  

NASA Astrophysics Data System (ADS)

The spatio-temporal chaotic behavior of magnet spin wave states in thin films of Yttrium Iron Garnet is experimentally studied. Samples (12-37 ?m thick rectangular films) are placed in DC magnetic fields to align the atomic spins, which are then excited at resonant frequencies. Chaotic spin wave states result when surface modes of the film begin to interact above an excitation power threshold. We study the spatial correlation of the chaotic states of the sample by monitoring the magnetic moment at two positions on the film surface. The magnetic moments are detected by using coaxial loops mounted near the film surface and we can obtain time series corresponding to the signals at each position. We have analyzed the correlation between the two signals using both linear and nonlinear analysis techniques.

Goodridge, Chris; Rachford, Fred; Carroll, Tom; Pecora, Lou

1999-11-01

176

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

177

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

178

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

179

Magnetoelectric Coupling and Relaxation in Yttrium Iron Garnet  

NASA Astrophysics Data System (ADS)

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

Yamasaki, Yuichi; Kohara, Yuki; Tokura, Yoshinori

2009-03-01

180

Phase Diagram for Magnon Condensate in Yttrium Iron Garnet Film  

PubMed Central

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

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

2013-01-01

181

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

182

Effect of yttrium 90 on experimental allergic arthritis in rabbits.  

PubMed Central

Seventeen rabbits were immunized with complete Freund's adjuvant and bovine serum albumin by the method of Dumonde and Glynn (1962), as modified by Cooke and Jasin (1972). Fifteen weeks after allergic arthritis developed in the knee joint, 8 animals were given an injection of 20 muCi yttrium 90 (90Y) into the left joint cavity; 7 were injected with 400 muCi. The animals were sacrificed at 2, 4, 8, 12, and 16 weeks and at 6 and 12 months after the injection. The right knee joint served as control for assessment of untreated allergic arthritis. Morphological control of the severity of the arthritis was provided by sacrificing 2 uninjected animals 13 weeks after immunization. Images

Meier-Ruge, W; Muller, W; Pavelka, K

1976-01-01

183

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

184

Nature of electrotransport in yttrium-iron garnet  

SciTech Connect

In a wide range of temperatures and oxygen partial pressures the electrical conductivity and thermoelectric power of sintered yttrium-iron garnet (YIG) is studied. To illustrate the substantial effect of a small amount of impurities on the electrical properties of YIG under identical conditions, the authors produced samples based on the starting iron oxide for ferrites with rectangular hysteresis loops. The electrical conductivity and thermoelectric power were measured together in a combined manner on the same sample by the two-probe method. The oxygen partial pressure was assigned at a total atmospheric pressure and controlled electrochemically using solid electrolytes based on ZrO/sub 2/(Y/sub 2/O/sub 3/). On the basis of a small-polaron model, the parameters for defect formation and charge transport were determined.

Petrov, A.N.; Denisov, G.V.; Zhukovskii, V.M.

1986-09-01

185

Short-term effects of intratracheal installations of yttrium barium copper oxide.  

National Technical Information Service (NTIS)

Inhalation exposures to the new high-temperature ((Tc)) superconductor (SC) materials can occur during manufacturing and fabrication processes. In this exploratory study, we examined the pulmonary response to the deposition of an yttrium barium copper oxi...

J. E. London L. R. Newkirk B. E. Lehnert

1990-01-01

186

Technique for Polishing Single Crystal Yttrium-Iron-Garnet Spheres (Correspondence)  

Microsoft Academic Search

A simple method of polishing Yttrium-iron-garnet spheres which produces samples of fractional oersted linewidths has been employed at the Air Force Cambridge Research Center. The technique consists of \\

B. R. Capone; E. Kelly; P. D. Gianino; J. I. Masters

1960-01-01

187

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

NASA Astrophysics Data System (ADS)

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

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

2006-07-01

188

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

Microsoft Academic Search

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

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

2006-01-01

189

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

190

Continuously Pumped 1-kW YAG (Yttrium Aluminum Garnet) Laser and Its Applications,  

National Technical Information Service (NTIS)

The YAG (yttrium aluminum garnet) laser coupled with optical fiber is finding ready acceptance in such industrial applications as welding, cutting, soldering and marking, thanks to its ease of beam handling and the exceptional location flexibility it offe...

S. Ishida S. Yoshida Y. Fujimori

1987-01-01

191

Antibacterial and antibiofilm properties of yttrium fluoride nanoparticles.  

PubMed

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 (YF(3)) nanoparticles (NPs) using sonochemistry. The sonochemical irradiation of an aqueous solution of yttrium (III) acetate tetrahydrate [Y(Ac)(3) · (H(2)O)(4)], containing acidic HF as the fluorine ion source, yielded nanocrystalline needle-shaped YF(3) 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. YF(3) 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 YF(3) NPs using a one-step synthesis and coating process. The coating procedure yielded a homogeneous YF(3) NP layer on the catheter, as analyzed by scanning electron microscopy and energy dispersive spectroscopy. These YF(3) NP-modified catheters were investigated for their ability to restrict bacterial biofilm formation. The YF(3) 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

192

Antibacterial and antibiofilm properties of yttrium fluoride nanoparticles  

PubMed Central

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

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

2012-01-01

193

Systematics of quasirotational states in N=88 nuclei  

NASA Astrophysics Data System (ADS)

The decays of 4.2-min 152Tb, 3.3-min 154Ho, 11.8-min 154Ho, and 82-sec 156Tm have been studied by ?-ray and conversion electron spectroscopy using the He-jet technique. High-spin states in 152Gd were also studied in the 152Sm(?,4n?) reaction at 50 MeV and the 150Sm(?,2n?) reaction at 28 MeV. The systematic behavior of quasirotational bands in N=88 nuclei has been studied, and observed features in the location of ?- and ?-band states are shown to be explainable from a consideration of available orbitals in a Nilsson diagram. Microscopic calculations employing fourth and sixth order versions of the boson expansion model of Tamura, Kishimoto, and Weeks reproduce the known low-lying positive parity states in 150Sm, 152Gd, 154Dy, and 156Er. Experimentally observed negative-parity states are explained remarkably well by a quadrupole-octupole coupling model, but a backbending plot suggests a possible change in intrinsic structure above spin 11. RADIOACTIVITY 152Tbm, 154Hom1, 154Hom2, 156Tm; I?, E?, Ice, Ece, ?-? coin. 152Gd, 154Dy, 156Er deduced levels, ICC, J, ? systematics, comparison with microscopic theory. NUCLEAR REACTIONS 152Sm(?,4n), E?=50 MeV; 150Sm(?,2n), E?=28 MeV; measured E?, I?, I?(?), Ice, ?-? coin. 152Gd deduced levels, ICC, J, ?. Enriched targets, Ge(Li), Si(Li) detectors.

Zolnowski, D. R.; Hughes, M. B.; Hunt, J.; Sugihara, T. T.

1980-06-01

194

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

PubMed

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

195

Structural properties of the formation of yttrium germanides thin films on the Si(111) surface  

Microsoft Academic Search

We have performed first principles total energy calculations to investigate the deposit of yttrium digermanide on the Si(111) surface. We have used the periodic density functional theory as implemented in the Quantum-ESPRESSO package. For the adsorption of a monolayer of yttrium digermanide on the Si(111)-(1×1) surface, we have found that the most stable geometry corresponds to a configuration with Y

Alfredo Ramírez; Gregorio H. Cocoletzi; Noboru Takeuchi

2009-01-01

196

SEPARATIONS OF YTTRIUM AND SOME RARE EARTHS BY LIQUID-LIQUID EXTRACTION  

Microsoft Academic Search

The use of liquid-liquid extraction for the separation of some inorganic ;\\u000a compounds was demonstrated. The yttrium-- rare earth concentrates were obtained ;\\u000a from Fergusonite ore, Gadolinite ore, and a by-product from an ion-exchange resin ;\\u000a separation process. In each case the mixture in terms of oxide was composed of ;\\u000a from 50 to 60% yttrium and 5 to 15%

R. A. Foos; H. A. Wilhelm

1954-01-01

197

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

Microsoft Academic Search

Aluminide coatings on a mild steel substrate were modified by using an oxygen-active element, yttrium, for improved resistance\\u000a to corrosive erosion. The performance of the yttrium-containing coating during the following three erosion conditions was\\u000a evaluated: dry sand erosion at different temperatures, erosion in a dilute NaCl slurry containing 30% silica sand, and erosion\\u000a in a dilute H2SO4 slurry containing 30%

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

1999-01-01

198

Yttrium disilicate crystallites embedded porous sol-gel thin films for self-cleaning displays  

Microsoft Academic Search

We report on the preparation of self-cleaning and highly transparent yttrium disilicate phosphor host matrix. The yttrium disilicate crystallites were produced in titanosilicate thin films prepared by sol-gel and dip coating method. The thin film phosphor surface was maintained to be superhydrophilic by the synergic effect of the coproduced TiO2 anatase crystals and the high porosity of the film. The

Toney T. Fernandez; Gin Jose; Michael Ward; K. V. Arunkumar; N. V. Unnikrishnan

2009-01-01

199

Yttrium silicide formation and its contact properties on Si(1 0 0)  

Microsoft Academic Search

Yttrium silicide formation and its contact properties on Si(100) have been studied in this paper. By evaporating a yttrium metal layer onto Si(100) wafer in conventional vacuum condition and rapid thermal annealing, we found that YSi2–x begins to form at 350°C, and is stable to 950°C. Atomic force microscopy characterization shows the pinholes formation in the formed YSi2–x film. By

Wei Huang; Guo-Ping Ru; C. Detavernier; R. L. Van Meirhaeghe; Yu-Long Jiang; Xin-Ping Qu; Bing-Zong Li

2008-01-01

200

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

201

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

Microsoft Academic Search

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

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

2005-01-01

202

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

Microsoft Academic Search

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

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

2000-01-01

203

The behaviour of selected yttrium containing bioactive glass microspheres in simulated body environments.  

PubMed

The study aims at the manufacture and investigation of biodegradable glass microspheres incorporated with yttrium potentially useful for radionuclide therapy of cancer. The glass microspheres in the SiO2-Na2O-P2O5-CaO-K2O-MgO system containing yttrium were prepared by conventional melting and flame spheroidization. The behaviour of the yttrium silicate glass microspheres was investigated under in vitro conditions using simulated body fluid (SBF) and Tris buffer solution (TBS), for different periods of time, according to half-life time of the Y-90. The local structure of the glasses and the effect of yttrium on the biodegradability process were evaluated by Fourier Transform Infrared (FT-IR) spectroscopy and Back Scattered Electron Imaging of Scanning Electron Microscopy (BEI-SEM) equipped with Energy Dispersive X-ray (EDX) analysis. UV-VIS spectrometry and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was used for analyzing the release behaviour of silica and yttrium in the two used solutions. The results indicate that the addition of yttrium to a bioactive glass increases its structural stability which therefore, induced a different behaviour of the glasses in simulated body environments. PMID:17701304

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

2008-03-01

204

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

205

Effects of erbium:yttrium–aluminum–garnet and neodymium:yttrium–aluminum–garnet laser hypersensitivity treatment parameters on the bond strength of self-etch adhesives  

Microsoft Academic Search

This in vitro study evaluated the shear bond strength (SBS) of two self-etch adhesives to coronal and root dentin treated\\u000a with erbium:yttrium–aluminum–garnet (Er:YAG) or neodymium:yttrium–aluminum–garnet (Nd:YAG) lasers for dentin hypersensitivity.\\u000a The coronal and root dentin surfaces of 60 extracted human cuspids were divided into three groups (n?=?20): (1) control (without treatment); (2) treated with Er:YAG; (3) treated with Nd:YAG laser

E. Yaz?c?; S. Gurgan; N. Gutknecht; S. Imazato

2010-01-01

206

Influence of etching with erbium, chromium:yttrium-scandium-gallium-garnet laser on microleakage of class V restoration.  

PubMed

The aim of this in vitro study was to evaluate some parameters of dental etching when irradiated with an erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser. One-hundred sound human third molars were selected and randomly distributed into ten groups (n = 10). The class V cavities of group 1 (control) were prepared with a bur and etched with 37% phosphoric acid, while groups G2 to G10, were prepared with laser (5 W, 88.46 J/cm(2), 90/70% air/water) and etched with the following powers: G3 and G4, 0.25 W; G5 and G6, 0.5 W; G7 and G8, 0.75 W; G9 and G10, 1 W. Group G2 received no laser etching. Prior to restoration, G2, G4, G6, G8 and G10 received acid etching. After restoration, all samples were submitted to a microleakage test. According to statistical analysis (Kruskal-Wallis and Dunn's tests), G10 presented the lowest microleakage values (P<0.05). The other groups showed no differences between them. Etching with Er,Cr:YSGG laser (1 W) followed by phosphoric acid was effective in reducing the microleakage of class V restorations. PMID:19011950

Marotti, Juliana; Geraldo-Martins, Vinícius Rangel; Bello-Silva, Marina Stella; de Paula Eduardo, Carlos; Apel, Christian; Gutknecht, Norbert

2010-05-01

207

10 CFR 71.88 - Air transport of plutonium.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Air transport of plutonium. 71.88 Section...Controls and Procedures § 71.88 Air transport of plutonium. (a...or delivered to a carrier for air transport unless: (1) The...

2011-01-01

208

10 CFR 71.88 - Air transport of plutonium.  

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

2014-01-01

209

10 CFR 71.88 - Air transport of plutonium.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Air transport of plutonium. 71.88 Section...Controls and Procedures § 71.88 Air transport of plutonium. (a...or delivered to a carrier for air transport unless: (1) The...

2013-01-01

210

10 CFR 71.88 - Air transport of plutonium.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Air transport of plutonium. 71.88 Section...Controls and Procedures § 71.88 Air transport of plutonium. (a...or delivered to a carrier for air transport unless: (1) The...

2012-01-01

211

Possibilities of Improving the TD88 Atmospheric Total Density Model  

Microsoft Academic Search

In this paper we have examined possibilities for preserving and improving the total density model of the Earth's neutral thermosphere TD88 (Sehnal and Pospisilova 1988) via modelling differences between TD88 and NRLMSISE-00 (Picone et al. 2002), which is used as a control model. It is shown that these residuals can be approximated with polyharmonic function. Starting from this we have

S. Segan; D. Marceta

2010-01-01

212

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

213

A role for HMGB1, HSP60 and Myd88 in growth of murine mammary carcinoma in vitro  

PubMed Central

Previously we reported that Myd88 contributed to tumor progression. To begin to decipher what may be inducing Myd88 dependent signaling we focused on proteins that could function as damage associated molecular pattern molecules (DAMPs) since DAMPs have been reported to be secreted by tumors, and certain DAMPs mediate effects through toll-like receptors. A screen of mammary carcinoma for DAMP expression showed HMGB1 and HSP60 were significantly elevated relative to normal mammary epithelium, and targeting these DAMPs, or receptors for these DAMPs influenced growth of tumor cells. Moreover, analysis using a Myd88 inhibitory peptide suggested that HMGB1 mediated its effects in a Myd88 dependent manner, and inhibiting Myd88 function decreased HMGB1 and HSP60 gene expression. Collectively, these data suggest that HMGB1 and HSP60 contribute to growth of mammary carcinoma cells, HMGB1 accomplishes this, at least in part, through Myd88 dependent signaling, and these DAMPs are expressed in a Myd88 dependent manner.

Chalmers, Samantha A.; Eidelman, Alec S.; Ewer, Jason C.; Ricca, Jacob M.; Serrano, Antonio; Tucker, Kyle C.; Vail, Caroline M.; Kurt, Robert A.

2013-01-01

214

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

215

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.

Quintana, Albert; Sanz, Elisenda; Wang, Wengang; Storey, Granville P.; Guler, 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

216

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

217

Chemical vapor deposition of yttrium barium(2) copper(3) oxygen(x) thin films for wire applications. Final report, May 88-Dec 91  

SciTech Connect

The chemical vapor deposition of superconducting ytterbium barium copper oxide thin films onto continuous lengths of ceramic fiber tows has been investigated. This project couples two areas of current interest in the materials field: continuous fiber coating and the deposition of one of the unique high temperature superconducting oxides. The YBa2Cu3Ox material has zero resistance at temperatures above 77 K (the boiling point of nitrogen), and the film form has been shown to have high critical current densities. By coating ceramic fiber tows, a strong, flexible superconducting material in the form of wire can be developed and used for several applications, including coils for magnets and transmission lines. Over 900 deposition runs were completed using a horizontal CVD furnace and over 150 continuous fiber coating experiments were completed. The deposition was performed on fiber tows, flat samples, and flexible tapes; the continuous substrates were moved and held stationary in the furnace.

Lackey, W.J.; Hanigofsky, J.A.; Hill, D.N.; Carter, W.B.; Barefield, E.K.

1991-12-01

218

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

PubMed Central

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.

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

1992-01-01

219

Luminescence properties of cerium doped nanocrystalline yttrium silicate  

NASA Astrophysics Data System (ADS)

Here we report the preparation of nanocrystalline silica capped yttrium silicate doped with cerium and a study on its photoluminescence (PL) properties. The preparation method presented is simple and unique and can easily be scaled up for bulk production. The material shows blue luminescence at room temperature, and it is enhanced by a few orders of magnitude upon annealing. The PL intensities of these nanocrystalline samples are much stronger than similar bulk samples. The annealing temperatures required are much less than the bulk sample formation temperatures. Such annealing related PL enhancement is attributed to the formation of the optimum nanocrystalline size required for strong luminescence from nanoparticles due to the doped rare earth ions and quantum confinement related effects. It was also suggested that nano-Y2SiO5 has a relatively more intense blue emission than the nano-Y2Si2O7 phase. This is attributed to the position of the 5d level of Ce3 + in the energy band.

Karar, N.; Chander, Harish

2005-10-01

220

Structural and electrical properties of zirconium doped yttrium oxide nanostructures  

NASA Astrophysics Data System (ADS)

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

Bahari, Ali; Ebrahimzadeh, Masoud; Gholipur, Reza

2014-04-01

221

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

222

Superconductivity at 23 K in yttrium palladium boride carbide  

NASA Astrophysics Data System (ADS)

Copper oxide compounds have dominated superconductivity research since 1986 because of their very high transition temperatures (T(sub c)s). In contrast, no new families of high-T(sub c) intermetallic compounds have been discovered since the A15-type Nb3X compounds were first reported in 1953. The intermetallics with highest T(sub c)s have all been based on niobium, with the highest T(sub c)s being 20.7 K for bulk Nb(3)Ga and 23.2 K for sputtered films of Nb(3)Ge. Here we report the observation of superconductivity at 23 K in a multiple-phase bulk sample of a quaternary intermetallic, yttrium palladium boride carbide. This is higher than any T(sub c) reported previously for a bulk intermetallic compound. Although the materials are not yet single-phase, the superconducting volume fraction is large. We propose that this compound may represent the first of a new family of superconducting intermetallics with relatively high T(sub c)s.

Cava, R. J.; Takagi, H.; Batlogg, B.; Zandbergen, H. W.; Krajewski, J. J.; Peck, W. F., Jr.; van Dover, R. B.; Felder, R. J.; Siegrist, T.; Mizuhashi, K.

1994-01-01

223

GAXRD and in situ X-ray diffraction characterizations of the yttrium implantation effect on pure iron oxidation at high temperature  

Microsoft Academic Search

High temperature oxidation behaviours of yttrium implanted and unimplanted pure iron were analyzed at T=700^{circ}C and under oxygen partial pressure Po2=0.04 Pa for 24h by several X-ray diffraction techniques to understand the yttrium implantation effect on pure iron oxidation resistance at high temperature. Sample compositions and structures were investigated before and after yttrium implantation to determine the yttrium distributions and

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

2002-01-01

224

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

DOEpatents

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

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

1984-01-01

225

88. North and west facades of powerhouse; looking southeast. Photo ...  

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

88. North and west facades of powerhouse; looking southeast. Photo by Jet Lowe, HAER, 1989. - Puget Sound Power & Light Company, White River Hydroelectric Project, 600 North River Avenue, Dieringer, Pierce County, WA

226

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

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

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

227

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

228

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

229

42 CFR 32.88 - Examinations and treatment.  

Code of Federal Regulations, 2013 CFR

... PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICAL CARE AND EXAMINATIONS MEDICAL CARE FOR PERSONS WITH HANSEN'S DISEASE AND OTHER PERSONS IN EMERGENCIES Persons with Hansen's Disease § 32.88 Examinations...

2013-10-01

230

42 CFR 32.88 - Examinations and treatment.  

Code of Federal Regulations, 2012 CFR

... PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICAL CARE AND EXAMINATIONS MEDICAL CARE FOR PERSONS WITH HANSEN'S DISEASE AND OTHER PERSONS IN EMERGENCIES Persons with Hansen's Disease § 32.88 Examinations...

2012-10-01

231

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

232

21 CFR 526.88 - Amoxicillin trihydrate for intramammary infusion.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Amoxicillin trihydrate for intramammary infusion...INTRAMAMMARY DOSAGE FORMS § 526.88 Amoxicillin trihydrate for intramammary infusion... Each single dose syringe contains amoxicillin trihydrate equivalent to 62.5...

2010-04-01

233

21 CFR 526.88 - Amoxicillin trihydrate for intramammary infusion.  

Code of Federal Regulations, 2010 CFR

...2009-04-01 2009-04-01 false Amoxicillin trihydrate for intramammary infusion...INTRAMAMMARY DOSAGE FORMS § 526.88 Amoxicillin trihydrate for intramammary infusion... Each single dose syringe contains amoxicillin trihydrate equivalent to 62.5...

2009-04-01

234

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

235

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

236

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

237

42 CFR 88.3 - Eligibility-currently identified responders.  

Code of Federal Regulations, 2013 CFR

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

2013-10-01

238

42 CFR 88.7 - Eligibility-currently identified survivors.  

Code of Federal Regulations, 2013 CFR

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

2013-10-01

239

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

...2014-01-01 2014-01-01 false Patents, copyrights, inventions, and publications...Information Order Miscellaneous § 1230.88 Patents, copyrights, inventions, and publications. Any patents, copyrights, trademarks,...

2014-01-01

240

42 CFR 88.7 - Eligibility-currently identified survivors.  

Code of Federal Regulations, 2012 CFR

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

2012-10-01

241

Ring tensile test of modified Halthane 88-2  

SciTech Connect

Seven adhesives, designated Halthanes, have been developed at the Lawrence Livermore National Laboratory. This research deals with the stress-strain behavior of Halthane 88-2 and a surfactant modified version of this adhesive as a function of aging time and temperature. The urethane adhesive, Halthane 88-2, consists of prepolymer 88, curing agent XU-205, FC-430, with 88/12/0.25 weight ratio, respectively. Ring tensile measurements were made on control samples and samples aged at elevated temperatures on a logarithmic time scale. The temperatures were 60/sup 0/C, 75/sup 0/C and 100/sup 0/C, and aged for 3 days, 10 days, and 28 days.

Chiu, I.L.

1983-12-19

242

E8(8) in light cone superspace  

Microsoft Academic Search

We derive the non-linear action of E8(8) on the constrained chiral superfield in the light-cone superspace with eight complex Grassmann variables. We construct (to lowest order in the coupling) the sixteen dynamical supersymmetries which generate a Hamiltonian with E8(8) invariance in three space-time dimensions, and show that it has only interactions with even powers of the coupling constant.

Lars Brink; Sung-Soo Kim; Pierre Ramond

2008-01-01

243

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

244

Thermal analysis and temperature-programmed reduction studies of copper–zirconium and copper–zirconium–yttrium compounds  

Microsoft Academic Search

Differential thermal analysis evidenced that introduction of copper or yttrium into zirconia matrix delays its crystallization temperature. This result was connected to the stabilization of the zirconia tetragonal phase observed by X-ray diffraction. In addition, it was observed a decomposition delay of supported copper nitrate with yttrium content in a zirconia support. Temperature-programmed reduction revealed the existence of different copper

Madona Labaki; Jean-François Lamonier; Stéphane Siffert; Antoine Aboukaïs

2005-01-01

245

R88-APOBEC3Gm Inhibits the Replication of Both Drug-resistant Strains of HIV-1 and Viruses Produced From Latently Infected Cells.  

PubMed

Human immunodeficiency virus type 1 (HIV-1) drug resistance and the latent reservoir are the two major obstacles to effectively controlling and curing HIV-1 infection. Therefore, it is critical to develop therapeutic strategies specifically targeting these two obstacles. Recently, we described a novel anti-HIV approach based on a modified human intrinsic restriction factor, R88-APOBEC3G (R88-A3G). In this study, we further characterized the antiviral potential of R88-A3GD128K (R88-A3Gm) against drug-resistant strains of HIV-1 and viruses produced from latently infected cells. We delivered R88-A3Gm into target cells using a doxycycline (Dox)-inducible lentiviral vector and demonstrated that its expression and antiviral activity were highly regulated by Dox. In the presence of Dox, R88-A3Gm-transduced T cells were resistant to infection caused by wild-type and various drug-resistant strains of HIV-1. Moreover, when the R88-A3Gm-expressing vector was transduced into the HIV-1 latently infected ACH-2 cell line or human CD4(+) T cells, on activation by phorbol-12-myristate-13-acetate or phytohemaglutinin, R88-A3Gm was able to curtail the replication of progeny viruses. Altogether, these data clearly indicate that R88-A3Gm is a highly potent HIV-1 inhibitor, and R88-A3Gm-based anti-HIV gene therapy is capable of targeting both active and latent HIV-1-infected cells to prevent subsequent viral replication and dissemination.Molecular Therapy-Nucleic Acids (2014) 3, e151; doi:10.1038/mtna.2014.2; published online 4 March 2014. PMID:24594845

Wang, Xiaoxia; Ao, Zhujun; Danappa Jayappa, Kallesh; Shi, Bei; Kobinger, Gary; Yao, Xiaojian

2014-01-01

246

R88-APOBEC3Gm Inhibits the Replication of Both Drug-resistant Strains of HIV-1 and Viruses Produced From Latently Infected Cells  

PubMed Central

Human immunodeficiency virus type 1 (HIV-1) drug resistance and the latent reservoir are the two major obstacles to effectively controlling and curing HIV-1 infection. Therefore, it is critical to develop therapeutic strategies specifically targeting these two obstacles. Recently, we described a novel anti-HIV approach based on a modified human intrinsic restriction factor, R88-APOBEC3G (R88-A3G). In this study, we further characterized the antiviral potential of R88-A3GD128K (R88-A3Gm) against drug-resistant strains of HIV-1 and viruses produced from latently infected cells. We delivered R88-A3Gm into target cells using a doxycycline (Dox)-inducible lentiviral vector and demonstrated that its expression and antiviral activity were highly regulated by Dox. In the presence of Dox, R88-A3Gm–transduced T cells were resistant to infection caused by wild-type and various drug-resistant strains of HIV-1. Moreover, when the R88-A3Gm–expressing vector was transduced into the HIV-1 latently infected ACH-2 cell line or human CD4+ T cells, on activation by phorbol-12-myristate-13-acetate or phytohemaglutinin, R88-A3Gm was able to curtail the replication of progeny viruses. Altogether, these data clearly indicate that R88-A3Gm is a highly potent HIV-1 inhibitor, and R88-A3Gm–based anti-HIV gene therapy is capable of targeting both active and latent HIV-1–infected cells to prevent subsequent viral replication and dissemination.

Wang, Xiaoxia; Ao, Zhujun; Danappa Jayappa, Kallesh; Shi, Bei; Kobinger, Gary; Yao, Xiaojian

2014-01-01

247

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

248

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

PubMed

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

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

2014-02-01

249

Fractionation of yttrium and holmium during basaltic soil weathering  

NASA Astrophysics Data System (ADS)

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

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

2013-10-01

250

Luminescence probing of structural transformations of yttrium acid oxalate trihydrate  

SciTech Connect

The structural transformations of yttrium acid oxalate trihydrate YH{sub 5}O{sub 2}(C{sub 2}O{sub 4}){sub 2}{center_dot}H{sub 2}O in the 77-350{degrees}K temperature range have been investigated with the aid of a luminescent probe in the form of an admixture of 5-15% Eu{sup 3+} ions replacing Y{sup 3+} ions. The vibronic luminescence (the {sup 5}D{sub 0}-{sup 7}F{sub 0-4} transitions) and excitation (the {sup 7}F{sub 0}-{sup 5}D{sub 0} transition) spectra of Eu{sup 3+}, as well as the IR absorption spectra, have ben studied. The temperature dependence of the crystal-field parameters has been spectra, have been studied. The temperature dependence of the crystal-field parameters has been examined. Deuteration has been employed to identify the bands of the librational and translations vibrations of the proton-containing groups. The anisotropic mobility of the proton-containing groups detected in the PMR spectra in the vicinity of 118 K as the samples are heated is manifested in the vibronic and IR spectra as smooth broadening and displacement of the bonds of the librational and translational vibrations of these groups to lower frequencies. The phase transition at 328 K is manifested in the luminescence spectra as an abrupt increase in the symmetry of the crystal field: the second-order axis is transformed into a fourth-order axis.

Tsaryuk, V.I.; Zolin, V.F.; Savchenko, V.D.; Yaroslavtsev, A.B. [Institute of Telecommunications and Electronics (Russian Federation)]|[M.V. Lomonosov Moscow State Univ. (Russian Federation)

1994-06-01

251

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

252

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

253

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

254

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

255

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

SciTech Connect

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

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

2005-02-01

256

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

257

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

NASA Astrophysics Data System (ADS)

Three mixed europium-yttrium organic frameworks: Eu 2- xY x(Mel)(H 2O) 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 3+ lifetime becomes longer in these MOFs than those of the Eu analog.

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

2012-02-01

258

Applications of an Y88/Be Photoneutron Calibration Source to Dark Matter and Neutrino Experiments  

NASA Astrophysics Data System (ADS)

The low-energy monochromatic neutron emission from an Y88/Be source can be exploited to mimic the few keVnr nuclear recoils expected from low-mass weakly interacting massive particles and coherent scattering of neutrinos off nuclei. Using this source, a ?10% quenching factor is measured for sodium recoils below 24keVnr in NaI[Tl]. This is considerably smaller than the 30% typically adopted in the interpretation of the DAMA/LIBRA dark matter experiment, resulting in a marked increase of its tension with other searches, under the standard set of phenomenological assumptions. The method is illustrated for other target materials (superheated and noble liquids).

Collar, J. I.

2013-05-01

259

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

260

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

Microsoft Academic Search

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

S. Geschwind

1961-01-01

261

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

262

Spectroscopy of ^86,87,88Se levels populated through beta decay of ^86,87,88As  

NASA Astrophysics Data System (ADS)

The overabundances of Sr, Y and Zr elements observed in some r-process-enriched, metal-poor stars complicate the quest for the r-process site. Jones et al. [Phys. Rev. C73, (2006)] reported an anomalously high 886-keV E(2+) in ^88Se54 , which may be related to a doubly-magic ^90Se56. This new waiting point might explain the Sr, Y, Zr overabundances. A new experiment was carried out at NSCL to measure the structure of neutron-rich Se isotopes. New spectroscopic information of ^86,87,88Se has been obtained through the beta decay of ^86,87,88As nuclei. A gamma ray at 93 keV has been observed in the decay of ^87As that could arise from the transition 5/2^+ to 3/2^+, as observed in the higher-Z N = 53 isotones. A gamma-ray transition at 651 keV has been observed in the decay of ^88As that could be a part of the yrast cascade in ^88Se. The 886 keV gamma-ray observed by Jones et al. could not be verified.

Pereira, J.; Walters, W. B.; Smith, M. K.; Aprahamian, A.; Chiara, C. J.; Gade, A.; Ginter, T.; Hackman, G.; Larson, N.; Liddick, S. N.; Prokop, C.; Schatz, H.; Tarasov, O. B.

2013-04-01

263

IFT88 plays a cilia- and PCP-independent role in controlling oriented cell divisions during vertebrate embryonic development.  

PubMed

The role for cilia in establishing planar cell polarity (PCP) is contentious. Although knockdown of genes known to function in ciliogenesis has been reported to cause PCP-related morphogenesis defects in zebrafish, genetic mutations affecting intraflagellar transport (IFT) do not show PCP phenotypes despite the requirement for IFT in cilia formation. This discrepancy has been attributed to off-target effects of antisense morpholino oligonucleotide (MO) injection, confounding maternal effects in zygotic mutant embryos, or an inability to distinguish between cilia-dependent versus cilia-independent protein functions. To determine the role of cilia in PCP, we generated maternal + zygotic IFT88 (MZift88) mutant zebrafish embryos, which never form cilia. We clearly demonstrate that cilia are not required to establish PCP. Rather, IFT88 plays a cilia-independent role in controlling oriented cell divisions at gastrulation and neurulation. Our results have important implications for the interpretation of cilia gene function in normal development and in disease. PMID:24095732

Borovina, Antonia; Ciruna, Brian

2013-10-17

264

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

265

Raman scattering study of Czochralski-grown yttrium flouride single crystals  

Microsoft Academic Search

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

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

1993-01-01

266

Mechanistic Study of the Selective Catalytic Reduction of Nitric Oxide with Methane over Yttrium Oxide  

Microsoft Academic Search

The catalytic activity of nanocrystalline Group IIIB metal oxides for the reduction of nitric oxide with methane was shown to be comparable to that of Co-ZSM-5. The mechanism of selective catalytic reduction of nitric oxide with methane in excess oxygen was examined over nanocrystalline yttrium oxide. A series of heterogeneous and homogeneous reaction steps was proposed to account for the

Mark D. Fokema; Jackie Y. Ying

2000-01-01

267

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

268

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

269

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

Microsoft Academic Search

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

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

2006-01-01

270

The selective antenna effect of tungstate anions for Tb-doped layered yttrium hydroxynitrate.  

PubMed

A simple way to detect and remove trace amounts of WO4(2-) ions from an aqueous solution was demonstrated by their light-harvesting ability and selective excitation energy transfer to a Tb-doped layered yttrium hydroxynitrate matrix. PMID:23835680

Lee, Kiryong; Lee, Byung-Il; Byeon, Song-Ho

2013-08-18

271

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

272

Photothermally modulated spatially resolved FMR detection of Walker modes in yttrium iron garnet spheres  

Microsoft Academic Search

The photothermally modulated (PM) ferromagnetic resonance (FMR) combines the high sensitivity of conventional FMR and spatial resolution. This technique has been applied to a single-crystalline yttrium iron garnet (YIG) sphere with a diameter of 2 mm. For the first time, the spatial variation of the high-frequency magnetization patterns known as Walker modes were visualized and it is thus shown that

F. Rodelsperger; F. Schreiber; H. Benner; J. Pelzl

1994-01-01

273

In-situ observation of hydrogen hot trapping from molten lithium with yttrium  

Microsoft Academic Search

Hydrogen permeation window is candidate not only for tritium recovery system from molten lithium, but also for hydrogen monitor for molten lithium because hydrogen permeation rate is dominated by hydrogen concentration. In this study, in-situ observation of deuterium hot trapping by yttrium in molten lithium was performed, measuring HD and D2 permeation through an iron wall at 773, 823 and

Juro Yagi; Akihiro Suzuki; Takayuki Terai; Takeo Muroga; Satoru Tanaka

2009-01-01

274

Recovery of lanthanides and yttrium from red mud by selective leaching  

Microsoft Academic Search

This study presents a rapid and selective method for the recovery of lanthanides and yttrium, existing in economically interesting concentrations, from red mud, the byproduct of the alumina production. The leaching process is based on the extraction of these elements with diluted nitric acid from red mud under moderate conditions and without using any preliminary treatment. Several parameters such as

M. Ochsenkühn-Petropulu; Th. Lyberopulu; K. M. Ochsenkühn; G. Parissakis

1996-01-01

275

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

National Technical Information Service (NTIS)

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

M. Eibschutz P. Coppens

1964-01-01

276

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

NASA Astrophysics Data System (ADS)

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

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

2005-04-01

277

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

NASA Astrophysics Data System (ADS)

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

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

2008-11-01

278

Protective Oxides Formed on CoCrAlY (Cobalt, Chromium, Aluminum and Yttrium) Coatings.  

National Technical Information Service (NTIS)

The metallic coatings used to protect the hot-section turbine blades of marine gas turbines are often a mixture of cobalt, chromium, aluminum, and yttrium (CoCrA1Y). Using the surface sensitive technique of x-ray photoelectron spectroscopy, the protective...

L. F. Aprigliano

1986-01-01

279

COMPLEXOMETRIC TITRATION OF YTTRIUM AND THE LANTHANONS. I. A COMPARISON OF DIRECT METHODS  

Microsoft Academic Search

A comparison was made of a number of direct complexometric titrations ; previously published ior the determination of yttrium and the lanthanons. ; Working and optimum pH ranges were obtained for what are considered to be the ; best indicators, Alizarin Red S screened with Methylene Blue, Eriochrome Black T, ; Copper-Naphthyl Azoxine, and Xylenol Orange. The precision and accuracy

S. J. Lyle

1963-01-01

280

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

281

A generalized ionic approach to the epitaxial growth of yttrium iron garnet films in molten solutions  

Microsoft Academic Search

An ionic approach to the liquid-phase-epitaxy (LPE) growth of yttrium iron garnet (YIG) films suitable for microwave signal processing and other integrated electronic or magnetic applications has been developed. By extending Giess' theory and by accounting for the conspicuous amount of previous published data, the proposed model figures out a unified description of the solubility characteristics of the YIG system.

P. De Gasperis; R. Marcelli

1987-01-01

282

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

National Technical Information Service (NTIS)

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

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

1995-01-01

283

Propagation of electromagnetic wave packets in iron-yttrium garnet plates and films  

SciTech Connect

The propagation of wave packets and harmonic waves in iron-yttrium garnet (YIG) polycrystalline plates and single-crystalline films is studied. The basic parameters of the waves are determined with the use of the equations for a flat waveguide and also the equations of magnetostatics. The theoretical results agree well with the experimental results.

Visatskas, A.V.; Ivashka, V.P.; Meshkauskas, I.I.

1987-10-01

284

Determination of yttrium using YO band head obtained by laser enhanced ionization spectrometry.  

National Technical Information Service (NTIS)

The determination of yttrium (Y) in water in the concentration range of 2 (mu)g/ml to 200 (mu)g/ml by laser enhanced ionisation (LEI) technique is reported. The YO band head at 584.27 nm belonging to A(sup 2)(Pi) - X(sup 2) (Sigma)(sup +) system is used f...

S. S. Deshpande P. P. Khanna

1997-01-01

285

Secretary of State Albright awaits the launch of STS-88  

NASA Technical Reports Server (NTRS)

U.S. Secretary of State Madeleine Albright talks with NASA Administrator Daniel Goldin (at left) in the VIP lounge at the Apollo/Saturn V Center while awaiting launch of Mission STS-88, the first U.S. launch for the International Space Station. Astronaut Michael Lopez-Alegria is looking on in background.

1998-01-01

286

State-Level Wheat Statistics, 1949-88.  

National Technical Information Service (NTIS)

The bulletin provides State-level time series data on production levels and trends for all wheat, winter wheat, durum wheat, and other spring wheat for 1949-88. Table variables include area planted, area harvested, yield per harvested acre, quantity produ...

J. Langley S. Langley

1989-01-01

287

ANSI Z88.2 (1992): Practices for Respiratory Protection  

Microsoft Academic Search

This article outlines changes to the ANSI Z88.2 standard for respiratory protection, which incorporates the latest information on the performance of respirators. Several major changes have been made in the standard since its last revision in 1980, such as revision of the list of assigned protection factors and changes in the requirements for breathing air, either from the immediate environment

Thomas J. Nelson; Donald P. Wilmes; Robert A. daRoza

1994-01-01

288

88. Photocopy of drawing (October 1950 architectural drawing by Stevens ...  

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

88. Photocopy of drawing (October 1950 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, Georgia). First floor plan, additions and alterations to Rich's Inc., drawing no. A-3. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

289

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

290

88. Photographic copy of retouched photograph (circa 1918, original print ...  

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

88. Photographic copy of retouched photograph (circa 1918, original print in Archives, Public Affairs Department, Sears Merchandise Group, Hoffman Estates, Illinois). Photographer unknown. INTERIOR VIEW OF MERCHANDISE BUILDING, SHIPPING COURT, SECOND FLOOR - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

291

STS-88 Endeavor: Crew Arrival at the Shuttle Launch Facility  

NASA Technical Reports Server (NTRS)

The STS-88 crew (Commander Robert D. Cabana, Pilot Frederick W. Sturckow, Mission Specialists Nancy J. Currie, Jerry L. Ross James H. Newman, and Sergei K. Krikalev) are shown arriving at the facility in fighter jet aircraft. They assemble for group photos, then depart.

1998-01-01

292

38 CFR 11.88 - Cancellation of note.  

Code of Federal Regulations, 2013 CFR

...Disposition of Notes Secured by Adjusted Certificates Redeemed from Banks by the Department of Veterans Affairs Under Section 502 of the World War Adjusted Compensation Act, As Amended (pub. L. 120, 68th Cong.) § 11.88 Cancellation of note. When a...

2013-07-01

293

88. BUILDING NO. 545, LOOKING NORTH AT BOX TESTING HOUSE. ...  

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

88. BUILDING NO. 545, LOOKING NORTH AT BOX TESTING HOUSE. BUILDING NO. 561 (CANNON POWDER BLENDER) IN RIGHT BACKGROUND. BOXES AND CONTAINERS WERE TESTED HERE BEFORE BEING SENT TO POWDER LOADING FACILITIES LIKE BUILDING NO. 565. - Picatinny Arsenal, 500 Area, Powder Factory & Power House, State Route 15 near I-80, Dover, Morris County, NJ

294

Ring Tensile Test of Modified Halthane 88-2.  

National Technical Information Service (NTIS)

Seven adhesives, designated Halthanes, have been developed at the Lawrence Livermore National Laboratory. This research deals with the stress-strain behavior of Halthane 88-2 and a surfactant modified version of this adhesive as a function of aging time a...

I. L. Chiu

1983-01-01

295

Draft Genome Sequence of Novosphingobium nitrogenifigens Y88T  

PubMed Central

Novosphingobium nitrogenifigens was originally isolated from pulp and paper mill wastewater, a low-nitrogen, high-carbon environment. N. nitrogenifigens is the first known nitrogen-fixing, polyhydroxyalkanoate-accumulating sphingomonad, and we report the annotated draft genome sequence of the type strain Y88T here.

Macdonald, Lucy; Liu, Vincent; Smit, Anne-Marie

2012-01-01

296

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

NASA Technical Reports Server (NTRS)

A cyclic furnace study was conducted on thermal barrier systems to evaluate the effects of yttrium, chromium, and aluminum in nickel-base alloy bond coatings and the 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

297

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

298

The comparison of CAP88-PC version 2.0 versus CAP88-PC version 1.0  

SciTech Connect

40 CFR Part 61 (Subpart H of the NESHAP) requires DOE facilities to use approved sampling procedures, computer models, or other approved procedures when calculating Effective Dose Equivalent (EDE) values to members of the public. Currently version 1.0 of the approved computer model CAP88-PC is used to calculate EDE values. The DOE has upgraded the CAP88-PC software to version 2.0. This version provides simplified data entry, better printing characteristics, the use of a mouse, and other features. The DOE has developed and released version 2.0 for testing and comment. This new software is a WINDOWS based application that offers a new graphical user interface with new utilities for preparing and managing population and weather data, and several new decay chains. The program also allows the user to view results before printing. This document describes a test that confirmed CAP88-PC version 2.0 generates results comparable to the original version of the CAP88-PC program.

Yakubovich, B.A.; Klee, K.O.; Palmer, C.R.; Spotts, P.B.

1997-12-01

299

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

300

Extinction Associated with the Ultracompact HII Region, S88B  

NASA Astrophysics Data System (ADS)

We present high spatial resolution mapping of the inner arcminute of the compact HII region S88B (G61.5+0.1) in Br gamma (2.122 micron ) line emission and compare with 5 GHz radio continuum emission (Garay et al. 1993). On a larger scale (1deg x 0.5deg ), the stellar counts derived from Two Micron All Sky Survey (2MASS) images are used to determine the extent of the molecular cloud surrounding S88B. By varying the line-of-sight extinction, we fit a spectral type to stars appearing in J (1.25 micron ), H (1.65 micron ), K (2.23 micron ) and 3.3 micron broad band images taken with the University of Rochester 3(rd) Generation Infrared Camera and compare with other extinction determinations.

Goetz, J. A.; Howard, E. M.; Pipher, J. L.; Forrest, W. J.

1998-12-01

301

STS-88 Mission Specialist James Newman suits up before launch  

NASA Technical Reports Server (NTRS)

In the Operations and Checkout Building, STS-88 Mission Specialist James H. Newman takes part in a complete suit check before launch. Newman holds a toy dog, 'Pluto,' representing the crew nickname Dog Crew 3 and Newman's nickname, Pluto. Mission STS-88 is expected to launch at 3:56 a.m. EST with the six-member crew aboard Space Shuttle Endeavour on Dec. 3. Endeavour carries the Unity connecting module, which the crew will be mating with the Russian-built Zarya control module already in orbit. In addition to Unity, two small replacement electronics boxes are on board for possible repairs to Zarya batteries. The mission is expected to last 11 days, 19 hours and 49 minutes, landing at 10:17 p.m. EST on Dec. 14.

1998-01-01

302

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

Microsoft Academic Search

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

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

2007-01-01

303

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

Microsoft Academic Search

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

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

2007-01-01

304

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

Microsoft Academic Search

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

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

2011-01-01

305

Effects of yttrium and cerium additives in lubricants on corrosive wear of stainless steel 304 and Al alloy 6061  

Microsoft Academic Search

Effects of oxygen active elements, yttrium and cerium, as additives in commercial lubricants on corrosive wear were investigated. Sliding wear losses of stainless steel 304 and Al alloy 6061 lubricated by oil and thin grease respectively with and without yttrium or cerium additive in a corrosive environment were determined. Dilute H2SO4 solution (10% H2SO4) was used as the corrosive medium

R. Liu; D. Y. Li

2000-01-01

306

Rydberg Series Analysis of Even-Parity Levels in Titanium and Yttrium Using Multi-Photon Laser Spectroscopy  

Microsoft Academic Search

Two-color laser photoionization spectroscopy has been used to study high-lying even-parity levels in the first spectra of titanium and yttrium. Partial electronic configurations were determined for several hundred newly observed atomic levels. The observed states form numerous Rydberg series which converge to several of the lowest states of the singly ionized species of both titanium and yttrium. New values for

John Edward Sohl

1990-01-01

307

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

Microsoft Academic Search

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

Linchun Wang; D. Y. Li

2003-01-01

308

Beneficial effects of yttrium on the mechanical failure and chemical stability of the passive film of 304 stainless steel  

Microsoft Academic Search

Recent studies demonstrated that yttrium improved the resistance of stainless steel to corrosive wear. However, the mechanism responsible for the beneficial effect of yttrium was not well understood. In this work, the breakdown of passive films of Y-free and Y-containing 304 stainless steel specimens during indentation and scratch testing was studied using a micro-mechanical probe. The failure of the passive

X. Y. Wang; D. Y. Li

2001-01-01

309

Efficient topology optimization in MATLAB using 88 lines of code  

Microsoft Academic Search

The paper presents an efficient 88 line MATLAB code for topology optimization. It has been developed using the 99 line code\\u000a presented by Sigmund (Struct Multidisc Optim 21(2):120–127, 2001) as a starting point. The original code has been extended by a density filter, and a considerable improvement in efficiency\\u000a has been achieved, mainly by preallocating arrays and vectorizing loops. A

Erik Andreassen; Anders Clausen; Mattias Schevenels; Boyan S. Lazarov; Ole Sigmund

2011-01-01

310

Surface Observed Global Land Precipitation Variations during 1900–88  

Microsoft Academic Search

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

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

1997-01-01

311

88. Photocopied August 1978. STATION GENERATORS LOOKING EAST FROM THE ...  

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

88. Photocopied August 1978. STATION GENERATORS LOOKING EAST FROM THE CENTRAL GALLERY, AUGUST 11, 1914. BY THIS DATE MICHIGAN NORTHERN HAD COMPLETED THE INSTALLATION OF GENERATORS IN THE EASTERN HALF OF THE POWER HOUSE AND HAD BEGUN WORK ON THE WEST. THE MOTOR-GENERATORS PURSHASED BY THE M.L.S.P.C. IN 1902 CAN BE SEEN ON THE LEFT BY THE LINE OF COLUMNS. (910) - Michigan Lake Superior Power Company, Portage Street, Sault Ste. Marie, Chippewa County, MI

312

88. ARAIII. "Petrochem" heater is hoisted over south exterior wall ...  

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

88. ARA-III. "Petro-chem" heater is hoisted over south exterior wall of heater pit in GCRE reactor building (ARA-608). Printing on heater says, "Petro-chem iso-flow furnace; American industrial fabrications, inc." Camera facing north. January 7, 1959. Ineel photo no. 529-124. Photographer: Ken Mansfield. - Idaho National Engineering Laboratory, Army Reactors Experimental Area, Scoville, Butte County, ID

313

STS-88 crew goes through Crew Equipment Interface Testing  

NASA Technical Reports Server (NTRS)

In the Space Station Processing Facility, STS-88 Mission Specialists Sergei Krikalev, a Russian cosmonaut, and Jerry L. Ross check out equipment on the Unity connecting module, primary payload on the mission. The STS-88 crew members are participating in a Crew Equipment Interface Test (CEIT), familiarizing themselves with the orbiter's midbody and crew compartments. Scheduled for launch on Dec. 3, 1998, STS-88 will be the first Space Shuttle launch for the International Space Station. The Unity connecting module will be mated to the Russian-built Zarya control module, already on orbit after a November launch. Unity will have two Pressurized Mating Adapters (PMAs) attached and 1 stowage rack installed inside. PMA-1 will connect U.S. and Russian elements; PMA-2 will provide a Shuttle docking location. Eventually, Unity's six ports will provide connecting points for the Z1 truss exterior framework, U.S. lab, airlock, cupola, Node 3, and the Multi-Purpose Logistics Module, as well as the control module. Zarya is a self-supporting active vehicle, providing propulsive control capability and power through the early assembly stages. It provides fuel storage capability and a rendezvous and docking capability to the Service Module.

1998-01-01

314

Population Files for use with CAP88 at Los Alamos  

SciTech Connect

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

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

2012-07-10

315

Cytokine production by human lymphocytes stimulated by a herbal compound containing Bupleurum (KY88 LIVER LIVO)  

Microsoft Academic Search

AIM: Compounds containing Bupleurum possess immunomodulating effects. KY88 LIVER LIVO (KY88) is a blend of such compound. The aim of this study is to investigate the effects of KY88 on the production of cytokines by lymphocytes in vitro. METHODS: Seventy Sprague Dawley rats were used of which 40 were orally fed with 4 mg purified KY88 for 35 d. Normal

Wing Cheong Louis; SHAM Shun; Tong Jonathan

316

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

PubMed Central

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

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

2013-01-01

317

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

Microsoft Academic Search

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

Iulian Radu; D. Y. Li

2008-01-01

318

Nuclear structure of strontium-80 and yttrium-85  

NASA Astrophysics Data System (ADS)

High-spin states in 80Sr and 85Y were investigated using the detector arrays Gammasphere and Microball, at the 88-Inch Cyclotron at LBNL. 80Sr was populated with the reaction 58Ni( 29Si, ?2pn)80Sr using a 128 MeV beam, and with the reaction 58Ni(28Si, ?2 p)80Sr using a 130 MeV beam. 85y was populated with the reaction 58Ni(31P, 4 p)85Y using a 134 MeV beam. Data was analyzed using coincidence analysis, lifetime measurements for 80Sr, and angular distributions. New structures in the expanded level schemes are reported, including a tentative superdeformed band in 85Y. Results are discussed in terms of a Cranked Shell Model and compared to theoretical cranked Woods-Saxon shell model calculations. Based on the comparison between these calculations and the experimental results, shape evolution for both isotopes is suggested. Band termination was investigated for 80Sr, but no evidence for band termination was found.

Wood, Valan Quinn

2000-11-01

319

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

SciTech Connect

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

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

2012-08-20

320

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

NASA Astrophysics Data System (ADS)

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.

1988-09-01

321

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

322

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

323

Bulky Pulmonary Mucosa-Associated Lymphoid Tissue Lymphoma Treated with Yttrium-90 Ibritumomab Tiuxetan  

PubMed Central

An 84-year-old woman was admitted to our hospital with nonproductive cough and dyspnea on exertion. Computed tomography (CT) scan revealed extensive consolidation in the right lung. She was diagnosed with pulmonary mucosa-associated lymphoid tissue (MALT) lymphoma using CT-guided lung biopsy. Her pulmonary images and respiratory symptoms did not improve two months after receiving 4 cycles of rituximab weekly; therefore, yttrium-90 ibritumomab tiuxetan was chosen as salvage therapy. The abnormal shadow on her pulmonary images was significantly reduced two months later, and she had no symptoms without nonhematological toxicities. She has had no progression for 18 months. Furthermore, radiation pneumonitis has not also been observed. We herein reported bulky pulmonary MALT lymphoma treated with yttrium-90 ibritumomab tiuxetan.

Tamura, Shinobu; Ikeda, Tokuji; Kurihara, Toshio; Kakuno, Yoshiteru; Nasu, Hideki; Nakano, Yoshio; Oshima, Koichi; Fujimoto, Tokuzo

2013-01-01

324

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

325

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

NASA Astrophysics Data System (ADS)

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 ?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; Chakraborty, Brahmananda; Ramaniah, Lavanya M.

2014-04-01

326

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

327

Distribution of K88 Escherichia coli-adhesive and nonadhesive phenotypes among pigs of four breeds  

Microsoft Academic Search

Enterotoxigenic Escherichia coli expressing K88 fimbrial adhesins often cause diarrhea in young pigs. However, some pigs are inherently resistant to colibacillosis, because they lack receptors on their epithelial cell brush borders to which the fimbriae bind. Phenotypic diversity with respect to the binding of E. coli expressing K88 of the three variant types (K88ab, K88ac, and K88ad) was reported by

Diane R. Baker; Lloyd O. Billey; David H. Francis

1997-01-01

328

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

329

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

330

Shear bond strength of composite bonded to erbium:yttrium-aluminum-garnet laser-prepared dentin  

Microsoft Academic Search

The purpose of this study was to evaluate the dentin bond strength to resin composite following erbium:yttrium-aluminum-garnet\\u000a (Er:YAG) laser preparation using different adhesive systems. Seventy dentin specimens prepared from human molar teeth were\\u000a randomly assigned to seven groups of ten. The first five groups were prepared with an Er:YAG laser 2940 nm at the manufacturer’s\\u000a recommended settings and (1) acid etched,

Sevil Gurgan; Arlin Kiremitci; Filiz Yalcin Cakir; Esra Yazici; Jale Gorucu; Norbert Gutknecht

2009-01-01

331

Atomization of yttrium, lanthanum, and neodymium in acetylene-nitrous oxide flame  

SciTech Connect

The degree of atomization of the element is the principal factor defining the sensitivity of the atomic-absorption determination. An attempt is made in this paper to establish its values for yttrium, lanthanum, and neodymium by the method of linear absorption, and also to estimate the effect of the degree of dissociation of the compounds, the degree of ionization, and the relative population of the ground energy level of the atoms on the efficiency of atomization of these elements.

Osipova, V.A.; Gorlova, M.N.; Kuzyakov, Y.Y.; Semenenko, K.A.

1985-10-01

332

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

PubMed

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/cm2. PMID:19543361

Do, Binh T; Smith, Arlee V

2009-06-20

333

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

334

Enhanced UV and suppressed defect related emission in yttrium doped zinc oxide  

NASA Astrophysics Data System (ADS)

Yttrium doped ZnO (YZO) synthesized through conventional solid state reaction method using ZnO and Y2O3 as starting material. The formation of YZO compounds were confirmed by X-ray diffraction and Raman spectroscopy. Photoluminescence measurements revealed an enhanced ultra-violet (UV) and suppressed defect related emission in YZO which is due to reduction in the concentration of the defects related to oxygen interstitials (Oi) and zinc vacancy (VZn) of ZnO.

Sharma, Vikas; Kumar, Parmod; Rana, Geeta; Vyas, Rishi; Sachdev, K.; Malik, Hitendra K.; Asokan, K.

2014-04-01

335

Hepatic Abscess After Yttrium90 Radioembolization for Islet-Cell Tumor Hepatic Metastasis  

Microsoft Academic Search

Infectious complications after yttrium-90 (y-90) radioembolization of hepatic tumors are rare. Most reports describe hepatic\\u000a abscesses as complications of other locoregional therapies, such as transcatheter arterial embolization or chemoembolization.\\u000a These usually occur in patients with a history of biliary intervention and present several weeks after treatment. We report\\u000a a case of hepatic abscess formed immediately after y-90 radioembolization of a

Neil B. Mascarenhas; Mary F. Mulcahy; Robert J. Lewandowski; Riad Salem; Robert K. Ryu

2010-01-01

336

Modification of Mg 2Si in Mg–Si alloys with yttrium  

Microsoft Academic Search

The modification of in situ formed Mg2Si in Mg–Si alloys with yttrium (Y) was investigated. As-cast microstructure analysis of Mg–5wt.% Si alloys indicates that all the primary Mg2Si crystals are surrounded by a layer of ?-Mg dendritic halos, which is again surrounded by the eutectic Mg2Si+Mg structures. When the Y content is 0.1 or 0.4wt.%, the sizes of primary and

Q. C. Jiang; H. Y. Wang; Y. Wang; B. X. Ma; J. G. Wang

2005-01-01

337

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

NASA Astrophysics Data System (ADS)

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

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

2013-09-01

338

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

339

LAG EFFECT CAUSED BY MAGNETIC FIELD ACTING ON YTTRIUM AND FERRUM OXYHYDRATE GELS  

Microsoft Academic Search

1. Experimental Yttrium oxyhydrate gel (YOG) was synthesized using the method (2) where ?? =9,75, n=0,09 mole, t of synthesis is equal to 20°C, with the time of pattern aging equal to 1 year. Ferrum oxyhydrate gel (FOG) was synthesized using the method (1) where Cr\\/Fe = 0,15; nitriletrimethylphos- phonic acid\\/Fe = 0,1; t of synthesis is equal to 20°C,

Y. I. Sukharev; T. G. Krupnova; I. Y. Apalikova; E. P Yudina

340

Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition  

Microsoft Academic Search

A ceramic composition composition is described. The ceramic composition consists essentially of from about 84 to 96 w\\/o titanium diboride, from about 1 to 9 w\\/o chromium diboride, and from about 3 to aobut 15 w\\/o yttrium-titanium-oxide. A method of making the ceramic composition is also described. The method of making the ceramic composition comprises the following steps: Step 1--A

Cressie E. Holcombe; Norman L. Dykes

1992-01-01

341

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

Microsoft Academic Search

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

Allan P. Weston; Prateek Sharma

2002-01-01

342

Surface and grain-boundary energies as well as surface mass transport in polycrystalline yttrium oxide  

Microsoft Academic Search

The sessile drop technique has been used to measure the temperature dependence of the contact angle, ?, of the liquid metals\\u000a Ag and Cu in contact with polycrystalline yttrium oxide (yttria, Y2O3) at the temperature range 1,333–1,773 K in Ar\\/4%H2 atmosphere. Combination of the experimental results with literature data taken for nonwetted and nonreactive oxide\\/liquid\\u000a metal systems permit the calculation of

G. Triantafyllou; G. N. Angelopoulos; P. Nikolopoulos

2010-01-01

343

Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition  

Microsoft Academic Search

A ceramic composition is described. The ceramic composition consists essentially of from about 84 to 96 w\\/o titanium diboride, from about 1 to 9 w\\/o chromium diboride, and from about 3 to about 15 w\\/o yttrium-titanium-oxide. A method of making the ceramic composition is also described. The method of making the ceramic composition comprises the following steps: Step 1--A consolidated

C. E. Holcombe; N. L. Dykes

1992-01-01

344

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

345

Faraday effect in yttrium orthoferrite in the range 1280–1600 nm  

Microsoft Academic Search

Wavelength dispersion of Faraday rotation in yttrium orthoferrite in the range 1280–1600 nm has been determined. At a wavelength of 1330 nm, the dependence of Faraday rotation, measured along the optical axis, on the angle ? between the polarization of the incident light and the crystallographic a-axis was investigated. For a 1.27 mm thick sample the algebraic difference of rotations

Y. S. Didosyan; V. Y. Barash

1995-01-01

346

Gyroscopic dynamics of antiferromagnetic vortices in domain boundaries of yttrium orthoferrite  

Microsoft Academic Search

It is established experimentally that the magnetic field directed along the b axis has little effect on the velocities of antiferromagnetic vortices in the domain boundary (DB) of yttrium orthoferrite\\u000a and fails to explain the presence of an appreciable gyroscopic force acting on these vortices. This force is induced by the\\u000a dynamic canting of magnetic sublattices proportional to the DB

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

2001-01-01

347

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

Microsoft Academic Search

Reflection of solitary flexural waves propagating in a supersonic domain wall of yttrium orthoferrite from the domain wall\\u000a part moving with the transverse-sound velocity is observed experimentally. This observation confirms that such a reflection\\u000a of a solitary flexural wave leads to a change in the sign of the topological charge of the antiferromagnetic vortex accompanied\\u000a by this wave, which proves

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

2007-01-01

348

Generation of pairs of antiferromagnetic vortices and their dynamics at a domain wall in yttrium orthoferrite  

Microsoft Academic Search

The stable generation of pairs of antiferromagnetic vortices at a domain wall moving at a velocity of 12 km\\/s is investigated\\u000a at the instant it passes through a defect in a thin plate of yttrium orthoferrite. The velocities of a vortex and an antivortex\\u000a moving in opposite directions along the domain wall and being accompanied by solitary flexural waves are

M. V. Chetkin; Yu. N. Kurbatova

2001-01-01

349

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

NASA Astrophysics Data System (ADS)

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

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

2007-04-01

350

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

351

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

Microsoft Academic Search

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

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

1993-01-01

352

Growth and characterization of yttrium oxide films by reactive magnetron sputtering  

Microsoft Academic Search

Yttrium oxide (Y2O3) is a promising ceramic material for electronic and optical applications due to its excellent properties. The purpose of this study is to characterize the effects of deposition parameters on the structure and composition of Y2O3 films. The films are grown on Si substrates by reactive magnetron sputtering at different substrate temperatures and oxygen pressures. The composition and

Jiaqi Zhu; Yuankun Zhu; Weixia Shen; Yongjie Wang; Jiecai Han; Gui Tian; Pei Lei; Bing Dai

2011-01-01

353

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

354

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

Microsoft Academic Search

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

Asli Secilmis; Subutayhan Altintas; Aslihan Usumez; Gizem Berk

2008-01-01

355

Molecular beam epitaxy growth of neodymium-doped yttrium aluminum perovskite  

NASA Astrophysics Data System (ADS)

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

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

2009-03-01

356

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

Microsoft Academic Search

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

M. Eibschütz; M. E. Lines

1982-01-01

357

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

PubMed Central

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

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

2012-01-01

358

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

359

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

NASA Astrophysics Data System (ADS)

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

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

2008-02-01

360

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

SciTech Connect

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

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

2006-10-01

361

Polymorphism in yttrium molybdate Y{sub 2}Mo{sub 3}O{sub 12}  

SciTech Connect

Yttrium molybdate (Y{sub 2}Mo{sub 3}O{sub 12}) has been prepared by non-hydrolytic sol-gel chemistry. The phase evolution upon heating was investigated using in situ and ex situ heat treatments combined with powder X-ray diffraction. This method has led to the isolation of two orthorhombic phases with different atomic connectivity. Yttrium adopts 6- and 7-coordinate sites in the Pbcn and Pba2 structures, respectively. Cocrystallization of both phases was observed in a narrow temperature range, suggesting that crystallization kinetics play a major role in phase formation. It was found that the Pba2 phase is the stable polymorph below 550 deg. C, and converts to Pbcn at higher temperatures. - Graphical abstract: Yttrium molybdate (Y{sub 2}Mo{sub 3}O{sub 12}) prepared by non-hydrolytic sol-gel chemistry crystallizes in a mixture of orthorhombic polymorphs with different atomic connectivities. The Pbcn and Pba2 phases coexist over a narrow temperature range. Crystallization of the Pbcn structure is kinetically favored. The Pba2 polymorph is the thermodynamically stable phase at low temperatures, and converts to Pbcn above 550 deg. C.

Gates, Stacy D. [Department of Chemistry, University of Toledo, Toledo, OH 43606 (United States); Lind, Cora [Department of Chemistry, University of Toledo, Toledo, OH 43606 (United States)], E-mail: cora.lind@utoledo.edu

2007-12-15

362

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

PubMed Central

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

Jakubek, Lorin; Marangoudakis, Spiro; Raingo, Jessica; Liu, Xinyuan; Lipscombe, Diane; Hurt, Robert

2009-01-01

363

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

SciTech Connect

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

Hopson, R.D.

1981-10-01

364

Yttrium and lanthanides in human lung fluids, probing the exposure to atmospheric fallout.  

PubMed

Inhalation of airborne particles can produce crystallization of phosphatic microcrysts in intraaveolar areas of lungs, sometimes degenerating into pulmonary fibrosis. Results of this study indicate that these pathologies are induced by interactions between lung fluids and inhaled atmospheric dust in people exposed to volcanic dust ejected from Mount Etna in 2001. Here, the lung solid-liquid interaction is evaluated by the distribution of yttrium and lanthanides (YLn) in fluid bronchoalveolar lavages on selected individuals according the classical geochemical approaches. We found that shale-normalised patterns of yttrium and lanthanides have a 'V shaped' feature corresponding to the depletion of elements from Nd to Tb when compared to the variable enrichments of heavy lanthanides, Y, La and Ce. These features and concurrent thermodynamic simulations suggest that phosphate precipitation can occur in lungs due to interactions between volcanic particles and fluids. We propose that patterns of yttrium and lanthanides can represent a viable explanation of some pathology observed in patients after prolonged exposure to atmospheric fallout and are suitable to become a diagnostic parameter of chemical environmental stresses. PMID:21168970

Censi, P; Tamburo, E; Speziale, S; Zuddas, P; Randazzo, L A; Punturo, R; Cuttitta, A; Aricò, P

2011-02-28

365

Overexpression of FOXO3, MYD88, and GAPDH Identified by Suppression Subtractive Hybridization in Esophageal Cancer Is Associated with Autophagy.  

PubMed

To find genes involved in tumorigenesis and the development of esophageal cancer, the suppression subtractive hybridization (SSH) method was used to identify genes that are overexpressed in esophageal cancer tissues compared to normal esophageal tissues. In our SSH library, the forkhead box O3 (FOXO3), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), and myeloid differentiation primary response 88 (MYD88) genes were the most highly upregulated genes, and they were selected for further studies because of their potential role in the induction of autophagy. Upregulation of these genes was also observed in clinical samples using qRT-PCR. In addition, coexpression analysis of the autophagy-related genes Beclin1, ATG12, Gabarapl, PIK3C3, and LC3 demonstrated a significant correlation between the differentially overexpressed genes and autophagy. Autophagy is an important mechanism in tumorigenesis and the development of chemoresistance in cancer cells. The upregulation of FOXO3, GAPDH, and MYD88 variants in esophageal cancer suggests a role for autophagy and provides new insight into the biology of esophageal cancer. We propose that FOXO3, GAPDH, and MYD88 are novel targets for combating autophagy in esophageal cancer. PMID:24527027

Soltany-Rezaee-Rad, Mohammad; Mottaghi-Dastjerdi, Negar; Setayesh, Neda; Roshandel, Gholamreza; Ebrahimifard, Farzaneh; Sepehrizadeh, Zargham

2014-01-01

366

Overexpression of FOXO3, MYD88, and GAPDH Identified by Suppression Subtractive Hybridization in Esophageal Cancer Is Associated with Autophagy  

PubMed Central

To find genes involved in tumorigenesis and the development of esophageal cancer, the suppression subtractive hybridization (SSH) method was used to identify genes that are overexpressed in esophageal cancer tissues compared to normal esophageal tissues. In our SSH library, the forkhead box O3 (FOXO3), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), and myeloid differentiation primary response 88 (MYD88) genes were the most highly upregulated genes, and they were selected for further studies because of their potential role in the induction of autophagy. Upregulation of these genes was also observed in clinical samples using qRT-PCR. In addition, coexpression analysis of the autophagy-related genes Beclin1, ATG12, Gabarapl, PIK3C3, and LC3 demonstrated a significant correlation between the differentially overexpressed genes and autophagy. Autophagy is an important mechanism in tumorigenesis and the development of chemoresistance in cancer cells. The upregulation of FOXO3, GAPDH, and MYD88 variants in esophageal cancer suggests a role for autophagy and provides new insight into the biology of esophageal cancer. We propose that FOXO3, GAPDH, and MYD88 are novel targets for combating autophagy in esophageal cancer.

Mottaghi-Dastjerdi, Negar; Setayesh, Neda; Roshandel, Gholamreza; Ebrahimifard, Farzaneh; Sepehrizadeh, Zargham

2014-01-01

367

Myeloid differentiation factor 88-dependent signaling is critical for acute organic dust-induced airway inflammation in mice.  

PubMed

Organic dust exposure within agricultural environments results in airway diseases. Toll-like receptor 2 (TLR2) and TLR4 only partly account for the innate response to these complex dust exposures. To determine the central pathway in mediating complex organic dust-induced airway inflammation, this study targeted the common adaptor protein, myeloid differentiation factor 88 (MyD88), and investigated the relative contributions of receptors upstream from this adaptor. Wild-type, MyD88, TLR9, TLR4, IL-1 receptor I (RI), and IL-18R knockout (KO) mice were challenged intranasally with organic dust extract (ODE) or saline, according to an established protocol. Airway hyperresponsiveness (AHR) was assessed by invasive pulmonary measurements. Bronchoalveolar lavage fluid was collected to quantitate leukocyte influx and cytokine/chemokine (TNF-?, IL-6, chemokine [C-X-C motif] ligands [CXCL1 and CXCL2]) concentrations. Lung tissue was collected for histopathology. Lung cell apoptosis was determined by a terminal deoxynucleotidyl transferase dUTP nick-end labeling assay, and lymphocyte influx and intercellular adhesion molecule-1 (ICAM-1) expression were assessed by immunohistochemistry. ODE-induced AHR was significantly attenuated in MyD88 KO mice, and neutrophil influx and cytokine/chemokine production were nearly absent in MyD88 KO animals after ODE challenges. Despite a near-absent airspace inflammatory response, lung parenchymal inflammation was increased in MyD88 KO mice after repeated ODE exposures. ODE-induced epithelial-cell ICAM-1 expression was diminished in MyD88 KO mice. No difference was evident in the small degree of ODE-induced lung-cell apoptosis. Mice deficient in TLR9, TLR4, and IL-18R, but not IL-1IR, demonstrated partial protection against ODE-induced neutrophil influx and cytokine/chemokine production. Collectively, the acute organic dust-induced airway inflammatory response is highly dependent on MyD88 signaling, and is dictated, in part, by important contributions from upstream TLRs and IL-18R. PMID:23492189

Bauer, Christopher; Kielian, Tammy; Wyatt, Todd A; Romberger, Debra J; West, William W; Gleason, Angela M; Poole, Jill A

2013-06-01

368

Identification of Binding Sites for Myeloid Differentiation Primary Response Gene 88 (MyD88) and Toll-like Receptor 4 in MyD88 Adapter-like (Mal)*  

PubMed Central

Upon activation, Toll-like receptor 4 (TLR4) binds adapter proteins, including MyD88 (myeloid differentiation primary response gene 88) and Mal (MyD88 adapter-like) for its signal transduction. TLR4 and the adapter proteins each contain a Toll/Il-1 receptor domain (TIR domain). In this study we used random mutagenesis and the mammalian two-hybrid method MAPPIT (mammalian protein-protein interaction trap) to identify mutations in Mal that disrupt its interaction with TLR4 and/or MyD88. Our study shows that four potential binding sites and the AB-loop in the Mal TIR domain all contribute to formation of the TLR4-Mal-MyD88 complex. Mutations in the symmetrical back-to-back Mal homodimer interface affect Mal homodimerization and interaction with MyD88 and TLR4. Our data suggest that Mal dimerization may lead to formation of potential binding platforms on the top and the side of the Mal dimer that bind MyD88 or TLR4. Mutations that affect the interaction of Mal with MyD88 also affect NF-?B activation induced by Mal overexpression. In MAPPIT, co-expression of the MyD88 TIR domain enhances Mal dimerization and Mal binding to TLR4. Similarly, co-expression of Mal and the MyD88 TIR domain strongly promotes dimerization of the TLR4 intracellular domain in MAPPIT. The different types of TIR-TIR interactions in the TLR4-Mal-MyD88 complex thus show cooperative binding in MAPPIT. We present plausible models for the TIR-TIR interactions in the TLR4-Mal-MyD88 complex.

Bovijn, Celia; Desmet, Anne-Sophie; Uyttendaele, Isabel; Van Acker, Tim; Tavernier, Jan; Peelman, Frank

2013-01-01

369

Identification of binding sites for myeloid differentiation primary response gene 88 (MyD88) and Toll-like receptor 4 in MyD88 adapter-like (Mal).  

PubMed

Upon activation, Toll-like receptor 4 (TLR4) binds adapter proteins, including MyD88 (myeloid differentiation primary response gene 88) and Mal (MyD88 adapter-like) for its signal transduction. TLR4 and the adapter proteins each contain a Toll/Il-1 receptor domain (TIR domain). In this study we used random mutagenesis and the mammalian two-hybrid method MAPPIT (mammalian protein-protein interaction trap) to identify mutations in Mal that disrupt its interaction with TLR4 and/or MyD88. Our study shows that four potential binding sites and the AB-loop in the Mal TIR domain all contribute to formation of the TLR4-Mal-MyD88 complex. Mutations in the symmetrical back-to-back Mal homodimer interface affect Mal homodimerization and interaction with MyD88 and TLR4. Our data suggest that Mal dimerization may lead to formation of potential binding platforms on the top and the side of the Mal dimer that bind MyD88 or TLR4. Mutations that affect the interaction of Mal with MyD88 also affect NF-?B activation induced by Mal overexpression. In MAPPIT, co-expression of the MyD88 TIR domain enhances Mal dimerization and Mal binding to TLR4. Similarly, co-expression of Mal and the MyD88 TIR domain strongly promotes dimerization of the TLR4 intracellular domain in MAPPIT. The different types of TIR-TIR interactions in the TLR4-Mal-MyD88 complex thus show cooperative binding in MAPPIT. We present plausible models for the TIR-TIR interactions in the TLR4-Mal-MyD88 complex. PMID:23460645

Bovijn, Celia; Desmet, Anne-Sophie; Uyttendaele, Isabel; Van Acker, Tim; Tavernier, Jan; Peelman, Frank

2013-04-26

370

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

PubMed Central

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

Johnson, Ian; Liu, Huinan

2013-01-01

371

CAP88-PC Version 4, an updated radionuclide NESHAPS model.  

PubMed

The latest version of the CAP88-PC computer model, Version 4, has many changes and improvements from previous versions. The most significant of these changes from a user perspective are the incorporation of age-dependent radionuclide dose and risk factors for ingestion and inhalation, the increase in the number of included radionuclides, and a change in the file management system used by the program. Other changes less visible to the user include new code architecture, incorporation of numerical solvers for the calculation of radioactive decay chains, including the ingrowth of decay products during air transport and ground surface deposition, enhanced error messages, updated on-line help, and a utility for migrating Version 3 datasets, wind files, and population files to Version 4. The modifications have produced a significant improvement in speed and stability for Version 4 relative to Version 3 and eliminated the solution approximations used in Version 3. The U.S. Environmental Protection Agency has implemented an extensive testing and documentation program for CAP88-PC Version 4 to address user concerns with past versions, resulting in enhanced documentation supporting compatibility with user software quality assurance programs. PMID:23803671

Wood, Raymond; Stuenkel, David; Rosnick, Reid

2013-08-01

372

Lawrence's Legacy : Seaborg's Cyclotron - The 88-Inch Cyclotron turns 40  

NASA Astrophysics Data System (ADS)

In 1958, Sputnik had recently been launched by the Russians, leading to worry in Congress and increased funding for science and technology. Ernest Lawrence was director of the "Rad Lab" at Berkeley. Another Nobel Prize winner, Glenn Seaborg, was Associate Laboratory Director and Director of the Nuclear Chemistry Division. In this atmosphere, Lawrence was phoned by commissioners of the Atomic Energy Commission and asked what they could do for Seaborg, "because he did such a fine job of setting up the chemistry for extracting plutonium from spent reactor fuel" [1]. In this informal way, the 90-Inch (eventually 88-Inch) Cyclotron became a line item in the federal budget at a cost of 3M (later increased to 5M). The 88-Inch Cyclotron achieved first internal beam on Dec. 12, 1961 and first external beam in May 1962. Forty years later it is still going strong. Pieced together from interviews with the retirees who built it, Rad Lab reports and archives from the Seaborg and Lawrence collections, the story of its design and construction - on-time and under-budget - provides a glimpse into the early days of big science. [1] remarks made by Elmer Kelly, "Physicist-in-charge' of the project on the occasion of the 40th anniversary celebration.

McMahan, Margaret; Clark, David

2003-04-01

373

GRAM 88 - 4D GLOBAL REFERENCE ATMOSPHERE MODEL-1988  

NASA Technical Reports Server (NTRS)

The Four-D Global Reference Atmosphere program was developed from an empirical atmospheric model which generates values for pressure, density, temperature, and winds from surface level to orbital altitudes. This program can generate altitude profiles of atmospheric parameters along any simulated trajectory through the atmosphere. The program was developed for design applications in the Space Shuttle program, such as the simulation of external tank re-entry trajectories. Other potential applications are global circulation and diffusion studies; also the generation of profiles for comparison with other atmospheric measurement techniques such as satellite measured temperature profiles and infrasonic measurement of wind profiles. GRAM-88 is the latest version of the software GRAM. The software GRAM-88 contains a number of changes that have improved the model statistics, in particular, the small scale density perturbation statistics. It also corrected a low latitude grid problem as well as the SCIDAT data base. Furthermore, GRAM-88 now uses the U.S. Standard Atmosphere 1976 as a comparison standard rather than the US62 used in other versions. The program is an amalgamation of two empirical atmospheric models for the low (25km) and the high (90km) atmosphere, with a newly developed latitude-longitude dependent model for the middle atmosphere. The Jacchia (1970) model simulates the high atmospheric region above 115km. The Jacchia program sections are in separate subroutines so that other thermosphericexospheric models could easily be adapted if required for special applications. The improved code eliminated the calculation of geostrophic winds above 125 km altitude from the model. The atmospheric region between 30km and 90km is simulated by a latitude-longitude dependent empirical model modification of the latitude dependent empirical model of Groves (1971). A fairing technique between 90km and 115km accomplished a smooth transition between the modified Groves values and the Jacchia values. Below 25km the atmospheric parameters are computed by the 4-D worldwide atmospheric model of Spiegler and Fowler (1972). This data set is not included. GRAM-88 incorporates a hydrostatic/gas law check in the 0-30 km altitude range to flag and change any bad data points. Between 5km and 30km, an interpolation scheme is used between the 4-D results and the modified Groves values. The output parameters consist of components for: (1) latitude, longitude, and altitude dependent monthly and annual means, (2) quasi-biennial oscillations (QBO), and (3) random perturbations to partially simulate the variability due to synoptic, diurnal, planetary wave, and gravity wave variations. Quasi-biennial and random variation perturbations are computed from parameters determined by various empirical studies and are added to the monthly mean values. The GRAM-88 program is for batch execution on the IBM 3084. It is written in STANDARD FORTRAN 77 under the MVS/XA operating system. The IBM DISPLA graphics routines are necessary for graphical output. The program was developed in 1988.

Johnson, D. L.

1994-01-01

374

Regulation of MyD88 Aggregation and the MyD88-dependent Signaling Pathway by Sequestosome 1 and Histone Deacetylase 6*  

PubMed Central

MyD88 is an essential adaptor molecule for Toll-like receptors (TLRs) and interleukin (IL)-1 receptor. MyD88 is thought to be present as condensed forms or aggregated structures in the cytoplasm, although the reason has not yet been clear. Here, we show that endogenous MyD88 is present as small speckle-like condensed structures, formation of which depends on MyD88 dimerization. In addition, formation of large aggregated structures is related to cytoplasmic accumulation of sequestosome 1 (SQSTM1; also known as p62) and histone deacetylase 6 (HDAC6), which are involved in accumulation of polyubiquitinated proteins. A gene knockdown study revealed that SQSTM1 and HDAC6 were required for MyD88 aggregation and exhibited a suppressive effect on TLR ligand-induced expression of IL-6 and NOS2 in RAW264.7 cells. SQSTM1 and HDAC6 were partially involved in suppression of several TLR4-mediated signaling events, including activation of p38 and JNK, but they hardly affected degradation of I?B? (inhibitor of nuclear factor ?B). Biochemical induction of MyD88 oligomerization induced recruitment of SQSTM1 and HDAC6 to the MyD88-TRAF6 signaling complex. Repression of SQSTM1 and HDAC6 enhanced formation of the MyD88-TRAF6 complex and conversely decreased interaction of the ubiquitin-specific negative regulator CYLD with the complex. Furthermore, ubiquitin-binding regions on SQSTM1 and HDAC6 were essential for MyD88 aggregation but were not required for interaction with the MyD88 complex. Thus, our study reveals not only that SQSTM1 and HDAC6 are important determinants of aggregated localization of MyD88 but also that MyD88 activates a machinery of polyubiquitinated protein accumulation that has a modulatory effect on MyD88-dependent signal transduction.

Into, Takeshi; Inomata, Megumi; Niida, Shumpei; Murakami, Yukitaka; Shibata, Ken-ichiro

2010-01-01

375

A novel myeloid differentiation factor 88 homolog, SpMyD88, exhibiting SpToll-binding activity in the mud crab Scylla paramamosain.  

PubMed

Myeloid differentiation factor 88 (MyD88) is an essential regulator in the Toll or Toll-like receptor (TLR) signaling pathway. In the current study, we characterized a novel crustacean MyD88 homolog, SpMyD88, and analyzed its binding activity with SpToll. The full-length cDNA sequence of SpMyD88 is 2933 bp, with a 1419 bp open reading frame encoding a 472-amino acid protein. No signal peptide was predicted. A death domain (residues 19-103), a Toll/interleukin-1 receptor (TIR) domain (residues 156-297), and a C-terminal extension (CTE) domain (residues 298-472) were also found. In a phylogenetic tree constructed with MyD88 homologs from both invertebrates and vertebrates, arthropod MyD88s including SpMyD88 formed a cluster containing a unique CTE domain. SpToll shared the highest identity with human TLR4. These two receptors were grouped into a cluster of a tree constructed based on the conserved TIR domains. SpToll also had a close relationship with other shrimp TLRs that possess potential antibacterial activity. SpMyD88 was highly expressed in the hemocytes, gills, hepatopancreas, and eye stalks. Upon challenge with Vibrio harveyi, both SpMyD88 and SpToll were significantly increased in the hemocytes, whereas only SpMyD88 was elevated by Staphylococcus aureus. In addition, a pull-down assay demonstrated that SpMyD88 showed a binding activity with SpToll. These results suggest that SpMyD88 and SpToll are involved in the defense system of mud crabs against Gram-negative bacteria. PMID:23280154

Li, Xin-Cang; Zhu, Lei; Li, Lin-Gui; Ren, Qian; Huang, Yan-Qing; Lu, Jian-Xue; Fang, Wen-Hong; Kang, Wei

2013-04-01

376

X-ray lasing - The targets  

NASA Astrophysics Data System (ADS)

The fabrication and assembly of a collisionally pumped X-ray laser target are described. The lasant medium, either selenium or yttrium, is in the form of a deposit 75 to 150 nm thick on a 150 nm thick film of Formvar. The film is supported on an aluminum frame that allows its illumination along its length from both sides by two Novette laser beams. The lasant foil is cut to a desired length, which is then verified by microscope to + or - 2 microns. Pinholes made by anisotropic etching are mounted at both ends of the aluminum window frame and determine the axis of the X-ray evacuation channel. The window frame is mounted in a target base and attached to a kinematic mount. Finally, an alignment mirror is set accurately perpendicular to the plasma channel to correctly line up the diagnostic instruments.

1985-11-01

377

X-ray lasing - The targets  

SciTech Connect

The fabrication and assembly of a collisionally pumped x-ray laser target are described. The lasant medium, either selenium or yttrium, is in the form of a deposit 75 to 150 nm thick on a 150 nm thick film of Formvar. The film is supported on an aluminum frame that allows its illumination along its length from both sides by two Novette laser beams. The lasant foil is cut to a desired length, which is then verified by microscope to + or - 2 microns. Pinholes made by anisotropic etching are mounted at both ends of the aluminum window frame and determine the axis of the x-ray evacuation channel. The window frame is mounted in a target base and attached to a kinematic mount. Finally, an alignment mirror is set accurately perpendicular to the plasma channel to correctly line up the diagnostic instruments.

Not Available

1985-11-01

378

A Study of the Density of Unfilled States in Yttrium Barium Copper Oxide by means of Soft X-ray Continuum Isochromats  

NASA Astrophysics Data System (ADS)

The New Mexico State University two-crystal X-ray spectrometer is designed for spectroscopy in the soft X-ray region. It has a demountable ultra-high vacuum X-ray tube and is equipped with Potassium Acid Phthalate (KAP) crystals and a flowing gas proportional counter. The KAP crystals provide a unique and sensitive spectral window at a photon energy of 530 eV. The high signal to background available makes it possible to record continuum limit spectra as continuum isochromats. We intend to obtain continuum isochromats at 530 eV from Yttrium Barium Copper Oxide, a high temperature superconductor. Such spectra are convolutions of the energy spectrum of the incident electrons in the target with the product of the density of unfilled states and a matrix element for the transition. The spectrum of initially mono-energetic electrons in the target can be derived from equivalent photoemission experiments and used to obtain a representation of the density of unfilled states above the Fermi level of the target material from the isochromat spectra.

Rajaram, Ramya; Liefeld, Robert

2002-10-01

379

STS-88 Mission Commander Cabana arrives for launch  

NASA Technical Reports Server (NTRS)

Mission Commander Robert D. Cabana smiles on his arrival at the Shuttle Landing Facility aboard a T-38 jet aircraft. He joins other crew members Pilot Frederick W. 'Rick' Sturckow, Mission Specialist Nancy J. Currie, Mission Specialist Jerry L. Ross, Mission Specialist James H. Newman, and Mission Specialist Sergei Konstantinovich Krikalev, a Russian cosmonaut, for pre-launch preparations for mission STS-88 aboard Space Shuttle Endeavour. The scheduled time of launch is 3:56 a.m. EST on Dec. 3 from Launch Pad 39A. The mission is the first U.S. launch for the International Space Station. Endeavour carries the Unity connecting module which the crew will be mating with the Russian- built Zarya control module already in orbit. In addition to Unity, two small replacement electronics boxes are on board for possible repairs to Zarya batteries. Endeavour is expected to land at KSC at 10:17 p.m. on Monday, Dec. 14.

1998-01-01

380

STS-88 Mission Specialist Krikalev arrives for launch  

NASA Technical Reports Server (NTRS)

Mission Specialist Sergei Konstantinovich Krikalev, a Russian cosmonaut, smiles on his arrival at the Shuttle Landing Facility aboard a T-38 jet aircraft. He joins other crew members Mission Commander Robert D. Cabana, Pilot Frederick W. 'Rick' Sturckow, Mission Specialist Nancy J. Currie, Mission Specialist Jerry L. Ross, and Mission Specialist James H. Newman for pre-launch preparations for mission STS-88 aboard Space Shuttle Endeavour. The scheduled time of launch is 3:56 a.m. EST on Dec. 3 from Launch Pad 39A. The mission is the first U.S. launch for the International Space Station. Endeavour carries the Unity connecting module which the crew will be mating with the Russian- built Zarya control module already in orbit. In addition to Unity, two small replacement electronics boxes are on board for possible repairs to Zarya batteries. Endeavour is expected to land at KSC at 10:17 p.m. on Monday, Dec. 14.

1998-01-01

381

Mucus clearance, MyD88-dependent and MyD88-independent immunity modulate lung susceptibility to spontaneous bacterial infection and inflammation  

PubMed Central

It has been postulated that mucus stasis is central to the pathogenesis of obstructive lung diseases. In Scnn1b-transgenic (Scnn1b-Tg+) mice, airway-targeted overexpression of the epithelial Na+ channel ? subunit causes airway surface dehydration, which results in mucus stasis and inflammation. Bronchoalveolar lavage from neonatal Scnn1b-Tg+ mice, but not wild-type littermates, contained increased mucus, bacteria, and neutrophils, which declined with age. Scnn1b-Tg+ mice lung bacterial flora included environmental and oropharyngeal species, suggesting inhalation and/or aspiration as routes of entry. Genetic deletion of the Toll/Interleukin-1 receptor adapter molecule MyD88 in Scnn1b-Tg+ mice did not modify airway mucus obstruction, but caused defective neutrophil recruitment and increased bacterial infection, which persisted into adulthood. Scnn1b-Tg+ mice derived into germ-free conditions exhibited mucus obstruction similar to conventional Scnn1b-Tg+ mice and sterile inflammation. Collectively, these data suggest that dehydration-induced mucus stasis promotes infection, compounds defects in other immune mechanisms, and alone is sufficient to trigger airway inflammation.

Livraghi-Butrico, Alessandra; Kelly, E. Jane; Klem, Erich R.; Dang, Hong; Wolfgang, Matthew C.; Boucher, Richard C.; Randell, Scott H.; O'Neal, Wanda K.

2012-01-01

382

FLAME PHOTOMETRIC STUDIES. PART A: STUDIES OF THE EXTRACTION AND FLAME EMISSION OF YTTRIUM. PART B: DROPLET SIZE OF AEROSOLS IN FLAME PHOTOMETRY. PART C: STUDIES OF THE REACTION ZONE OF AN OXYGEN-ACETYLENE FLAME  

Microsoft Academic Search

The Beckman DU flame spectrophotometer was employed in a study of the ; emission characteristics in an oxygenacetylene flame of the yttrium oxide bands ; which crest at 597 and 613 m mu . A 400-fold enhancement in the emission ; sensitivity of yttrium was obtained when a 4-methyl pentan2-one solution of ; yttrium as the 2-thenoyltrifluoroacetone chelate was aspirated

Carnes

1962-01-01

383

Wetting of single crystal mullite by borosilicate and yttrium-aluminosilicate glasses and wetting phenomena of steels containing aluminum and titanium  

Microsoft Academic Search

This dissertation consists of two major sections. The first section concerns the wetting of single crystal mullite by borosilicate and yttrium-aluminosilicate glasses. The borosilicate glass showed poor wetting and interacted only moderately with the substrate. The yttrium-aluminosilicate glass interacted strongly with mullite and showed very good wetting. Balanced chemical equations between each glass and mullite were derived from EDS data.

Benjamin Todd Eldred

2004-01-01

384

40 CFR 141.88 - Monitoring requirements for lead and copper in source water.  

Code of Federal Regulations, 2013 CFR

...requirements for lead and copper in source water. 141.88 Section 141.88 Protection...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) WATER PROGRAMS (CONTINUED) NATIONAL PRIMARY DRINKING WATER REGULATIONS Control of Lead and Copper...

2013-07-01

385

33 CFR 88.09 - Temporary exemption from light and shape requirements when operating under bridges.  

Code of Federal Regulations, 2013 CFR

...shape requirements when operating under bridges. 88.09 Section 88.09 Navigation...shape requirements when operating under bridges. A vessel's navigation lights...lowered if necessary to pass under a...

2013-07-01

386

42 CFR 88.13 - WTC Program Administrator's certification of health conditions.  

Code of Federal Regulations, 2012 CFR

...Administrator's decision to deny certification, as provided under § 88.15. (b) Health condition medically associated with a WTC-related...Administrator's decision to deny certification, as provided under § 88.15. (c) Treatment pending certification. While...

2012-10-01

387

42 CFR 88.13 - WTC Program Administrator's certification of health conditions.  

Code of Federal Regulations, 2013 CFR

...certification of health conditions. 88.13 Section 88.13 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES WORLD TRADE CENTER HEALTH PROGRAM §...

2013-10-01

388

42 CFR 88.12 - Physician's determination of WTC-related health conditions.  

Code of Federal Regulations, 2013 CFR

...WTC-related health conditions. 88.12 Section 88.12 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES WORLD TRADE CENTER HEALTH PROGRAM §...

2013-10-01

389

40 CFR 141.88 - Monitoring requirements for lead and copper in source water.  

Code of Federal Regulations, 2011 CFR

...requirements for lead and copper in source water. 141.88 Section 141.88 Protection...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) WATER PROGRAMS (CONTINUED) NATIONAL PRIMARY DRINKING WATER REGULATIONS Control of Lead and Copper...

2011-07-01

390

40 CFR 141.88 - Monitoring requirements for lead and copper in source water.  

Code of Federal Regulations, 2012 CFR

...requirements for lead and copper in source water. 141.88 Section 141.88 Protection...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) WATER PROGRAMS (CONTINUED) NATIONAL PRIMARY DRINKING WATER REGULATIONS Control of Lead and Copper...

2012-07-01

391

Operational observations of atypical meteorological features using the WSR-88D.  

National Technical Information Service (NTIS)

The Weather Surveillance Radar-1988 Doppler (WSR-88D) provides invaluable information on a variety of meteorological phenomena. The high sensitivity of the WSR-88D allows for the observation of phenomena that were not observable with previous WSR's. Preci...

J. S. Tongue G. J. Lehenbauer P. A. Michael M. A. Miller

1996-01-01

392

In-situ and ex-situ investigations of pulsed laser ablation of Y target  

Microsoft Academic Search

High purity yttrium was ablated by using frequency quadrupled ultra-violet pulses of a Nd:YAG laser (?=266nm, ?FWHM=7ns) with power density of about 1GW\\/cm2. Laser ablation process was studied using in-situ mass spectrometry of the ablated species in combination with ex-situ analyses of both target surface and deposited films. An increase on the Y ablation rate was found at the beginning,

A. Lorusso; F. Gontad; A. Perrone

2011-01-01

393

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

PubMed Central

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

Mysore, Venkataram; Anitha, B; Hosthota, Abhineetha

2013-01-01

394

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

PubMed

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

Mysore, Venkataram; Anitha, B; Hosthota, Abhineetha

2013-04-01

395

Toll-like receptor signal adaptor protein MyD88 is required for sustained endotoxin-induced acute hypoferremic response in mice.  

PubMed

Hypoferremia, associated with immune system activation, involves a marked reduction in the levels of circulating iron, coupled with iron sequestration within macrophages. Toll-like receptor (TLR) signaling plays an important role in the development of the hypoferremic response, but how downstream signaling events affect genes involved in iron metabolism is incompletely understood. We investigated the involvement of MyD88-dependent (MyD88) and MyD88-independent (TRIF) TLR signaling in the development of hypoferremia. Using MyD88-deficient and TRIF-deficient mice, we show that MyD88 and TRIF signaling pathways are critical for up-regulation by lipopolysaccharide (LPS) of the iron regulator hepcidin. In addition, MyD88 signaling is required for the induction of lipocalin 2 secretion and iron sequestration in the spleen. Activation of TLR4 and TLR3 signaling through LPS and polyinosinic:polycytidylic acid [poly(I:C)] treatments resulted in rapid down-regulation of HFE protein [encoded by the hemochromatosis gene (Hfe)] and ferroportin [encoded by solute carrier family 40 (iron-regulated transporter), member 1 (Slc40a1)] expression in the spleen, independent of MyD88 or TRIF signaling and proinflammatory cytokine production. However, lack of MyD88 signaling significantly impaired the hypoferremic response triggered by LPS, indicating that ferroportin and HFE protein down-regulation alone are insufficient to maintain hypoferremia. The extent of the hypoferremic response was found to be limited by initial, basal iron levels. Together, these results suggest that targeting specific TLR signaling pathways by affecting the function of adaptor molecules may provide new strategies to counteract iron sequestration within macrophages during inflammation. PMID:22497726

Layoun, Antonio; Huang, Hua; Calvé, Annie; Santos, Manuela M

2012-06-01

396

GAXRD and in situ X-ray diffraction characterizations of the yttrium implantation effect on pure iron oxidation at high temperature  

NASA Astrophysics Data System (ADS)

High temperature oxidation behaviours of yttrium implanted and unimplanted pure iron were analyzed at T=700^{circ}C and under oxygen partial pressure Po2=0.04 Pa for 24h by several X-ray diffraction techniques to understand the yttrium implantation effect on pure iron oxidation resistance at high temperature. Sample compositions and structures were investigated before and after yttrium implantation to determine the yttrium distributions and the main compounds induced by ion implantation. Yttrium implantation effects were characterized using analytical and structural techniques such as Rutherford Backscattering Spectrometry (RBS), Secondary Ion Mass Spectrometry (SIMS), Reflection High Energy Electron Diffraction (RHEED), X-ray Diffraction (XRD) and Glancing Angle X-ray Diffraction (GAXRD). Yttrium-implanted and unimplanted pure iron oxidation weight gains were studied by thermogravimetry and structural analyses were carried out by in-situ high temperature X-ray diffraction. The aim of this paper is to show the initial nucleation stage of the main compounds induced by pure iron oxidation at high temperature according to the surface treatment (yttrium implantation). The results obtained by Glancing angle X-ray diffraction and by in-situ high temperature X-ray diffraction allow to understand the better oxidation resistance observed in the case of yttrium implanted pure iron. Les comportements en oxydation à haute température (T=700^{circ}C - pression partielle d'oxygène Po2=0.04 Pa) du fer pur brut et implanté à l'yttrium ont été analysés pendant 24h par plusieurs techniques dc diffraction X afin de comprendre l'effet de l'yttrium sur la résistance à l'oxydation à haute température du fer pur. Les compositions et les analyses structurales ont été effectuées avant et après implantation pour déterminer les distributions en yttrium ainsi que les différents composés induits par l'implantion ionique. Les effets de l'implantation d'yttrium ont été caractérisés par spectrométrie de rétrodiffusion de Rutherford (RBS), spectrométrie de masse d'ions secondaires (SIMS), diffraction électronique à haute énergie (RHEED) et diffraction des rayons X classique (XRD) et sous incidences rasantes (GAXRD). Les variations de masse lors des oxydations du fer pur brut et implanté à l'yttrium ont été déterminées par thermogravimétrie et les analyses structurales ont été réalisées par diffraction X in-situ à haute température. Le but de cette étude est de mettre en évidence la germation des principaux composés induits lors de l'oxydation à haute température du fer pur implanté à l'yttrium afin de mieux comprendre l'amélioration de sa résistance à l'oxydation à haute température.

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

2002-07-01

397

Targets Directory.  

National Technical Information Service (NTIS)

This directory is intended to serve as a quick-look reference of target information. Section 1 describes target command and control systems, while section 2 discusses specific aerial, land, seaborne, and tow targets. Appendixes contain government points o...

1988-01-01

398

42 CFR 412.88 - Additional payment for new medical service or technology.  

Code of Federal Regulations, 2012 CFR

...Additional payment for new medical service or technology. 412.88 Section 412.88 Public...Cases, Special Treatment Payment for New Technology, and Payment Adjustment for Certain...Additional Special Payment for Certain New Technology § 412.88 Additional payment...

2012-10-01

399

42 CFR 412.88 - Additional payment for new medical service or technology.  

Code of Federal Regulations, 2011 CFR

...Additional payment for new medical service or technology. 412.88 Section 412.88 Public...Cases, Special Treatment Payment for New Technology, and Payment Adjustment for Certain...Additional Special Payment for Certain New Technology § 412.88 Additional payment...

2011-10-01

400

42 CFR 412.88 - Additional payment for new medical service or technology.  

Code of Federal Regulations, 2010 CFR

...Additional payment for new medical service or technology. 412.88 Section 412.88 Public...Cases, Special Treatment Payment for New Technology, and Payment Adjustment for Certain...Additional Special Payment for Certain New Technology § 412.88 Additional payment...

2010-10-01

401

Sinterability of magnesium silicon nitride powder with yttrium oxide addition coated using the homogeneous precipitation method  

Microsoft Academic Search

The sinterability of magnesium silicon nitride (MgSiN2) powder with yttrium oxide (Y2O3) addition was examined using the hot-pressing technique (31 MPa and N2 atmosphere) at 1550°C for 90 min; the MgSiN2 powder had been coated with 0–4 mass% of Y2O3 addition by a (urea-based) homogeneous precipitation method. Relative densities of the hot-pressed MgSiN2 compacts (ceramics) with and without Y2O3 addition

KIYOSHI ITATANI; IAN J. DAVIES; HIROAKI KUWANO; MAMORU AIZAWA

2002-01-01

402

Small yttrium-carbon and lanthanum-carbon clusters: Rings are most stable  

SciTech Connect

A theoretical study has been undertaken to determine the energetics of a variety of neutral and cationic isomeric forms of metal clusters MC{sub x}, where M = Y or La and x = 3-6. Included in this study are cyclic molecules and linear molecules, as well as recently-proposed `kite` structures. Geometries are optimized by the B3LYP density functional method, and energies are computed with the coupled-cluster method. The major conclusion of this work is that cyclic structures are the most stable, a result which holds for both yttrium and lanthanum and for both cations and neutral molecules. 19 refs., 1 fig., 2 tabs.

Strout, D.L.; Hall, M.B. [Texas A& M Univ., College Station, TX (United States)] [Texas A& M Univ., College Station, TX (United States)

1996-11-14

403

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

404

Radioembolization of Symptomatic, Unresectable Neuroendocrine Hepatic Metastases Using Yttrium90 Microspheres  

Microsoft Academic Search

Purpose  To evaluate safety, efficacy, and symptom-control of radioembolization in patients with unresectable liver metastases from\\u000a neuroendocrine tumors (NETLMs).\\u000a \\u000a \\u000a \\u000a \\u000a Materials and Methods  Forty-two patients (mean age of 62 years) with treatment-refractory NETLMs underwent radioembolization using yttrium-90 (90Y) resin microspheres. Posttreatment tumor response was assessed by cross-sectional imaging using the Response Evaluation\\u000a Criteria in Solid Tumors (RECIST) and tumor-marker levels. Laboratory and clinical toxicities

Philipp M. Paprottka; Ralf-T. Hoffmann; Alexander Haug; Wieland H. Sommer; Franziska Raeßler; Christoph G. Trumm; Gerwin P. Schmidt; Nima Ashoori; Maximilian F. Reiser; Tobias F. Jakobs

405

Mode locking of ceramic Nd:yttrium aluminum garnet with graphene as a saturable absorber  

NASA Astrophysics Data System (ADS)

The mode-locking of a ceramic Nd:yttrium aluminum garnet (YAG) solid-state laser (SSL) with solution processed graphene as saturable absorber (SA) was demonstrated. Transform-limited pulses with duration of 4 ps centered at 1064 nm were generated for a nondispersion compensated Nd:YAG SSL. Z-scan studies revealed that the graphene SA has a saturation intensity of 0.87 M W cm-2 and a normalized modulation depth of 17.4%. Our results illustrate the potential of using graphene as a mode locker for SSLs.

Tan, W. D.; Su, C. Y.; Knize, R. J.; Xie, G. Q.; Li, L. J.; Tang, D. Y.

2010-01-01

406

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

407

Unidirectional anisotropy in the spin pumping voltage in yttrium iron garnet/platinum bilayers  

SciTech Connect

Detailed measurements of the dc voltage generated in a thin Pt layer deposited on films of yttrium iron garnet (YIG) have been carried out to study the spin pumping effect produced by magnetostatic (MS) modes excited by a microwave field. In relatively thick YIG films the modes are far apart so that one can identify clearly the spin pumping voltage in V{sub SP} produced by each MS mode. We have discovered that when the sputter deposition of the thin Pt layer is made on the YIG film magnetized by a static magnetic field, V{sub SP} exhibits a strong unidirectional anisotropy.

Vilela-Leao, L. H.; Salvador, C.; Azevedo, A.; Rezende, S. M.

2011-09-05

408

Spin-wave excitation and propagation in microstructured waveguides of yttrium iron garnet/Pt bilayers  

NASA Astrophysics Data System (ADS)

We present an experimental study of spin-wave excitation and propagation in microstructured waveguides consisting of a 100 nm thick yttrium iron garnet/platinum (Pt) bilayer. The life time of the spin waves is found to be more than an order of magnitude higher than in comparably sized metallic structures, despite the fact that the Pt capping enhances the Gilbert damping. Utilizing microfocus Brillouin light scattering spectroscopy, we reveal the spin-wave mode structure for different excitation frequencies. An exponential spin-wave amplitude decay length of 31 ?m is observed which is a significant step towards low damping, insulator based micro-magnonics.

Pirro, P.; Brächer, T.; Chumak, A. V.; Lägel, B.; Dubs, C.; Surzhenko, O.; Görnert, P.; Leven, B.; Hillebrands, B.

2014-01-01

409

Process for the separation and purification of yttrium-90 for medical applications  

DOEpatents

An extraction chromatographic method for the preparation of .sup.90 Y of high chemical and radiochemical purity is disclosed. After an initial purification of a .sup.90 Sr stock solution and a suitable period of .sup.90 Y ingrowth, the solution is passed through a series of strontium-selective chromatographic columns, each of which lowers the .sup.90 Sr content of the mixture by a factor of about 10.sup.3. The .sup.90 Y remaining is freed from any residual .sup.90 Sr, from its .sup.90 Zr daughter, and from any remaining impurities by passing the sample through a final column designed to selectively retain yttrium.

Horwitz, Philip E. (Naperville, IL); Dietz, Mark L. (Evanston, IL)

1994-01-01

410

Magnetic and high frequency properties of nanogranular CoFe-yttrium-doped zirconia films  

NASA Astrophysics Data System (ADS)

Soft magnetic nanogranular FeCo-Yttrium-doped Zirconia thin films were fabricated using RF magnetron sputtering at different sputtering power. It was found that film electrical resistivity (?) decreased steeply with the increase of sputtering power, while both saturation magnetization (4?Ms) and natural ferromagnetic resonant frequency (ƒr) increased with the sputtering power ascending from 100 W to 200 W, but decreased when sputtering power exceeded 200 W. X-ray diffraction analysis and transmission electron microscopy confirmed that the films were nanocrystalline/amorphous composites. A saturation magnetization as high as 15.4 kGs and a ferromagnetic resonance frequency above 3 GHz were obtained.

Hao, Guijie; Zhang, Dainan; Tang, Xiaoli; Zhang, Huaiwu

2014-05-01

411

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

412

Acid resistance of dentin after erbium:yttrium-aluminum-garnet laser irradiation  

Microsoft Academic Search

The purpose of this study was to evaluate the acid resistance of erbium:yttrium-aluminum-garnet (Er:YAG) lased sub-surface\\u000a dentin using a scanning electron microscope (SEM). Dentin disks were exposed to a single pulse of Er:YAG laser irradiation\\u000a at 80 mJ\\/pulse under water spray, with the contact sapphire tip vertical to the dentin surfaces (n?=?15). Five specimens from the laser-ablated dentin surfaces were observed.

Zhengdi He; Masayuki Otsuki; Alireza Sadr; Junji Tagami

2009-01-01

413

Dynamics of antiferromagnetic vortices in the domain wall of canted antiferromagnet-yttrium orthoferrite  

NASA Astrophysics Data System (ADS)

Dynamics of antiferromagnetic vortices accompanied by solitary deflection waves in domain walls of yttrium orthoferrite was investigated experimentally using real time two-fold high-speed digital photography. It was shown the dynamics is quasi-relativistic with the limiting velocity of 20 km/s equal to spin-wave velocity on a linear part of its dispersion curve. It was shown that the dynamics is of gyroscopic origin. Effective magnetic field violating Lorenz-invariance dynamics is much greater than it was predicted theoretically.

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

2003-03-01

414

Adhesion after erbium, chromium:yttrium-scandium-gallium-garnet laser application at three different irradiation conditions  

Microsoft Academic Search

The aim of this study was to investigate whether distinct cooling of low fluence erbium, chromium:yttrium-scandium-gallium-garnet\\u000a (Er,Cr:YSGG) laser irradiation would influence adhesion. Main factors tested were: substrates (two), irradiation conditions\\u000a (three), and adhesives (three). A 750 ?m diameter tip was used, for 50 s, 1 mm from the surface, with a 0.25 W power output,\\u000a 20 Hz, energy density of 2.8 J\\/cm2 with energy per pulse

Sérgio Brossi Botta; Patricia Aparecida da Ana; Denise Maria Zezell; John M. Powers; Adriana Bona Matos

2009-01-01

415

Photoreduction of methylviologen catalyzed by phthalocyanine complexes of yttrium(III) and lanthanoid(III) metals  

SciTech Connect

The preparation of phthalocyanine complexes of yttrium, samarium, gadolinium, ytterbium, and lutetium is reported. The PcLnAcO complex (Pc = phthalocyanine dianion and AcO = acetate anion) was found to act as the sensitizer for the photoreduction of methylviologen chloride (MVCl{sub 2}) in a methanol solution upon irradiation with visible light. On the basis of data from visible spectrophotometric studies and laser flash-photolysis studies, the observation is made that the photoreduction of metalophthalocyanine complexes proceeds via an oxidative process, and a reaction scheme is proposed. 15 refs., 2 figs.

Kasuga, Kuninobu; Takahashi, Seiji; Tsukahara, Keiichi (Shimane Univ., Matsue (Japan)); Ohno, Takeshi (Osaka Univ. (Japan))

1990-01-24

416

A process for the separation and purification of yttrium-90 for medical applications  

DOEpatents

An extraction chromatographic method for the preparation of {sup 90}Y of high chemical and radiochemical purity is disclosed. After an initial purification of a {sup 90}Sr stock solution and a suitable period of {sup 90}Y ingrowth, the solution is passed through a series of strontium-selective chromatographic columns, each of which lowers the {sup 90}Sr content of the mixture by a factor of about 10{sup 3}. The {sup 90}Y remaining is freed from any residual {sup 90}Sr, from its {sup 90}Zr daughter, and from any remaining impurities by passing the sample through a final column designed to selectively retain yttrium.

Horwitz, P.E.; Dietz, M.L.

1993-01-01

417

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

418

Photoinduced magnetic effects in bulk single-crystalline, polycrystalline, and LPE films of Yttrium Iron Garnet  

NASA Astrophysics Data System (ADS)

The effect of light on magnetic initial permeability (the so-called photomagnetic effect) and photoinduced disaccommodation were studied in samples of yttrium iron garnet over the temperature range 77-300 K. The samples studied were bulk crystalline, produced by the floating zone method and the flux method, polycrystalline, produced by the usual sintering method, and single-crystalline films, produced by in situ liquid-phase epitaxis. One or both of the studied phenomena were observed in our experimental samples. To explain the experimental results, we suggest there is photoinduced structural distortion around oxygen vacancies due to a photoinduced change of charge imbalance.

Hisatake, K.; Matsubara, I.; Maeda, K.; Fujiwara, T.; Peters, M.; Abe, S.; Kudo, K.; Kainuma, S.; Tamaki, T.; Kino, Y.; de Francisco, C.; Munoz, J. M.; Alejos, O.; Hernandez, P.; Torres, C.; Shinagawa, K.

2002-05-01

419

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

420

Spin-wave instability threshold in single-crystal yttrium iron garnet for oblique pumping  

SciTech Connect

The spin-wave instability threshold h/sub crit/ for oblique pumping in high-quality single-crystal yttrium iron garnet (YIG) at room temperature and 9.317 GHz, has been examined. The experimental dependence of h/sub crit/ on the pump angle indicates that the microwave field components parallel and perpendicular to the dc field operate independently in exciting spin-wave instability. Theoretical fits to the data, based on this result, indicate that the spin-wave linewidth is strongly wave vector dependent and that the wave vector dependence varies with the pump angle.

Liu, Y.H.; Patton, C.E.

1982-07-01

421

Spin mixing conductance at a well-controlled platinum/yttrium iron garnet interface  

NASA Astrophysics Data System (ADS)

A platinum (Pt)/yttrium iron garnet (YIG) bilayer system with a well-controlled interface has been developed; spin mixing conductance at the Pt/YIG interface has been studied. A clear interface with good crystal perfection is experimentally demonstrated to be one of the important factors for an ultimate spin mixing conductance. The spin mixing conductance is obtained to be 1.3 × 1018 m-2 at the well-controlled Pt/YIG interface, which is close to a theoretical prediction.

Qiu, Z.; Ando, K.; Uchida, K.; Kajiwara, Y.; Takahashi, R.; Nakayama, H.; An, T.; Fujikawa, Y.; Saitoh, E.

2013-08-01

422

Improvement of the yttrium iron garnet/platinum interface for spin pumping-based applications  

NASA Astrophysics Data System (ADS)

The dependence of the spin pumping efficiency and the spin mixing conductance on the surface processing of yttrium iron garnet (YIG) before the platinum (Pt) deposition has been investigated quantitatively. The ferromagnetic resonance driven spin pumping injects a spin polarized current into the Pt layer, which is transformed into an electromotive force by the inverse spin Hall effect. Our experiments show that the spin pumping effect indeed strongly depends on the YIG/Pt interface condition. We measure an enhancement of the inverse spin Hall voltage and the spin mixing conductance by more than two orders of magnitude with improved sample preparation.

Jungfleisch, M. B.; Lauer, V.; Neb, R.; Chumak, A. V.; Hillebrands, B.

2013-07-01

423

Functional dependence and quasiperiodicity in the spatiotemporal dynamics of yttrium iron garnet films.  

PubMed

When thin films of yttrium iron garnet (YIG) are placed in a magnetic field and driven at microwave (rf) frequencies, nonlinear interactions within the material cause the normal microwave spin precession to be modulated at lower frequencies. We measure these lower frequency (kHz) signals at two spatially separated locations on the YIG film and use linear and nonlinear analysis to study the functional dependence of the spin dynamics at one location on the spin dynamics at the other location. We see dynamical states where nonlinear analysis can detect a functional dependence that the linear analysis fails to reveal. PMID:11461370

Goodridge, C L; Rachford, F J; Pecora, L M; Carroll, T L

2001-07-01

424

Magneto-optical Kerr effects of yttrium-iron garnet thin films incorporating gold nanoparticles.  

PubMed

We report an experimental study on magneto-optical (MO) Kerr effects of yttrium-iron garnet (YIG) thin films incorporating Au nanoparticles. The polar MO Kerr spectra in the wavelength between 400 and 800 nm show that, by incorporating the Au nanoparticles, Kerr rotation angles become negative values in the region, where the localized surface plasmon polariton (SPP) resonance of the Au nanoparticles is located. The anomalous Kerr rotation indicates a possible coupling between the MO Kerr effect of YIG and the SPP. A mechanism for the coupling is discussed. PMID:16712274

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

2006-04-28

425

Electric field tuning of domain magnetic resonances in yttrium iron garnet films  

NASA Astrophysics Data System (ADS)

The converse magnetoelectric effect is studied by voltage tuning of magnetic resonance in a bilayer of (111) yttrium iron garnet (YIG) film and polycrystalline lead zirconate titanate (PZT) when the YIG film is in a multi-domain state or under magnetic saturation. The application of a DC voltage across PZT manifests as a uniaxial anisotropy field in YIG and results in a shift in the resonance. In the multi-domain state, the voltage tuning of resonance is strong with a magneto-electric coefficient A = 12 MHz cm/kV. Under magnetic saturation, the voltage tuning is rather weak with A = 2 MHz cm/kV.

Zavislyak, I. V.; Popov, M. A.; Sreenivasulu, G.; Srinivasan, G.

2013-06-01

426

Growth and ferromagnetic resonance of yttrium iron garnet thin films on metals  

NASA Astrophysics Data System (ADS)

High-quality yttrium iron garnet (YIG) thin films were grown on a sandwich structure that consisted of a thick Cu layer and two thin cladding layers. The cladding layers were high entropy alloy nitrides (HEAN) and served as barriers to prevent Cu diffusion and oxidation during the YIG deposition. The Cu and HEAN layers were deposited by sputtering. The YIG films were grown by pulsed laser deposition. The YIG films had a thickness of several hundreds of nanometers, a surface roughness of several nanometers, and (111) orientation. The films showed a peak-to-peak ferromagnetic resonance linewidth of 1.1 Oe at 9.45 GHz.

Sun, Yiyan; Song, Young-Yeal; Wu, Mingzhong

2012-08-01

427

Induced magneto-transport properties at palladium/yttrium iron garnet interface  

NASA Astrophysics Data System (ADS)

As a thin layer of palladium (Pd) is directly deposited on an yttrium iron garnet or YIG (Y3Fe5O12) magnetic insulator film, Pd develops both low- and high-field magneto-transport effects that are absent in standalone Pd or thick Pd on YIG. While the low-field magnetoresistance peak of Pd tracks the coercive field of the YIG film, the much larger high-field magnetoresistance and the Hall effect do not show any obvious relationship with the bulk YIG magnetization. The distinct high-field magneto-transport effects in Pd are shown to be caused by interfacial local moments in Pd.

Lin, Tao; Tang, Chi; Shi, Jing

2013-09-01

428

Enhanced spin pumping damping in yttrium iron garnet/Pt bilayers  

NASA Astrophysics Data System (ADS)

Detailed measurements of the magnetic relaxation expressed in the linewidth of the ferromagnetic resonance (FMR) absorption in thick films of yttrium iron garnet (YIG) and in YIG/Pt bilayers carried out at room temperature reveal a very large increase in the relaxation rate with the deposition of a Pt layer. The additional relaxation increases linearly with the microwave frequency characteristics of the spin pumping mechanism. The value of the spin mixing conductance obtained from the data is one order of magnitude larger than the largest possible value determined from measurements of the voltage generated by FMR spin-pumping.

Rezende, S. M.; Rodríguez-Suárez, R. L.; Soares, M. M.; Vilela-Lea~o, L. H.; Ley Domínguez, D.; Azevedo, A.

2013-01-01

429

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

430

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

431

Effect of yttrium additions on the tensile properties and hardness of an iron-nickel-chromium alloy. [LMFBR  

SciTech Connect

Results of the research work show that the addition of 0.1% yttrium does not significantly change the mechanical properties of the AL1 alloy with temperature (even though the yttrium-doped samples did show a slight increase in yield stress and hardness for tests above 700/sup 0/C); the room temperature strength of the undoped AL1 alloy increases upon annealing at temperatures above 600/sup 0/C; and the room temperature uniform and fracture strains of the undoped AL1 alloy decrease upon annealing at temperatures above 600/sup 0/C.

Shah-Khan, M.Z.

1981-10-01

432

Overexpression of CD88 predicts poor prognosis in non-small-cell lung cancer.  

PubMed

CD88 (C5aR), a G-protein-coupled receptor, is well known as it functions in various inflammatory diseases, however, its role in tumorigenesis remains unclear. In this study we investigated the prognostic value of CD88 in patients with non-small-cell lung cancer (NSCLC) after surgical resection. Five NSCLC cell lines and one normal bronchial epithelial cell line were used to analyze the CD88 expression at the mRNA level. Then, the expression of CD88 and E-cadherin were further examined by immunohistochemistry (IHC) in tissue microarray (TMA) consisting of 208 cases of NSCLSs. Data revealed that CD88 expression was significantly higher in NSCLC cells than that in normal bronchial epithelial cells, and compared with the adjacent non-tumorous lung tissues, the CD88 protein overexpressed in NSCLC tissues. Furthermore, high levels of CD88 were found to be correlated with lymph node metastasis in NSCLC patients (p = 0.012). The 5-year overall survival of patients with CD88(high) was significantly lower than those in the CD88(low) group (p = 0.001), and multivariate analysis revealed that CD88 expression was an independent prognostic factor in patients' overall survival (HR = 1.614, 95% CI 1.082-2.407, p = 0.019). Finally, we confirmed the CD88 expression negatively correlated with E-cadherin expression (p < 0.001). Interference of CD88 expression impaired the migration of lung cancer cells and up-regulated the E-cadherin protein expression. Thus, our results indicate that CD88 is overexpressed in NSCLC. High levels of CD88 are associated with poor prognosis of NSCLC after resection and promote tumor metastasis via down-regulation of E-cadherin. CD88 can be a potential prognostic marker to screen patients for unfavorable prognosis. PMID:23706417

Gu, Jie; Ding, Jian-yong; Lu, Chun-lai; Lin, Zong-wu; Chu, Yi-wei; Zhao, Guang-yin; Guo, Jing; Ge, Di

2013-08-01

433

Yttrium-labelled peptides for therapy of NET.  

PubMed

Peptide receptor radionuclide therapy (PRRT) consists in the systemic administration of a synthetic peptide, labelled with a suitable beta-emitting radionuclide, able to irradiate tumours and their metastases via the internalization through a specific receptor, overexpressed on the cell membrane. After 15 years of experience, we can state that PRRT with (90)Y-labelled peptides is generally well tolerated. Acute side effects are usually mild, some of which are related to the co-administration of amino acids, such as nausea. Others are related to the radiopeptide, such as fatigue or the exacerbation of an endocrine syndrome, which rarely occurs in functioning tumours. Chronic and permanent effects on target organs, particularly the kidneys and the bone marrow, are generally mild if the necessary precautions are taken. Currently, the potential risk to kidney and red marrow limits the amount of radioactivity that may be administered. However, when tumour masses are irradiated with adequate doses, volume reduction may be observed. (90)Y-octreotide has been the most widely used radiopeptide in the first 8-10 years of experience. Unfortunately, all of the published results derive from different and inhomogeneous phase I/II studies. Hence, a direct comparison is virtually impossible to date. Nevertheless, even with these limitations, objective responses are registered in 10-34% of patients. The optimal timing of (90)Y-DOTATOC in the management of somatostatin receptor (SSTR)-positive tumours and the way in which it should be integrated with other treatments have yet to be defined, and prospective phase II/III trials comparing the efficacy and toxicity of different schemes of (90)Y-DOTATOC administration are still warranted. PMID:22388625

Bodei, Lisa; Cremonesi, Marta; Grana, Chiara M; Chinol, Marco; Baio, Silvia M; Severi, Stefano; Paganelli, Giovanni

2012-02-01

434

Production of high intensity 48Ca for the 88-Inch Cyclotron and other updates.  

PubMed

Recently the Versatile ECR for NUclear Science (VENUS) ion source was engaged in a 60-day long campaign to deliver high intensity (48)Ca(11+) beam to the 88-Inch Cyclotron. As the first long term use of VENUS for multi-week heavy-element research, new methods were developed to maximize oven to target efficiency. First, the tuning parameters of VENUS for injection into the cyclotron proved to be very different than those used to tune VENUS for maximum beam output of the desired charge state immediately following its bending magnet. Second, helium with no oxygen support gas was used to maximize the efficiency. The performance of VENUS and its low temperature oven used to produce the stable requested 75 e?A of (48)Ca(11+) beam current was impressive. The consumption of (48)Ca in VENUS using the low temperature oven was checked roughly weekly, and was found to be on average 0.27 mg/h with an ionization efficiency into the 11+ charge state of 5.0%. No degradation in performance was noted over time. In addition, with the successful operation of VENUS the 88-Inch cyclotron was able to extract a record 2 p?A of (48)Ca(11+), with a VENUS output beam current of 219 e?A. The paper describes the characteristics of the VENUS tune used for maximum transport efficiency into the cyclotron as well as ongoing efforts to improve the transport efficiency from VENUS into the cyclotron. In addition, we briefly present details regarding the recent successful repair of the cryostat vacuum system. PMID:24593540

Benitez, J Y; Franzen, K Y; Hodgkinson, A; Lyneis, C M; Strohmeier, M; Thullier, T; Todd, D; Xie, D

2014-02-01

435

Meteorological analyses of the March 1888 “Blizzard of '88”  

NASA Astrophysics Data System (ADS)

Meteorological analyses of the legendary March 11-14, 1888, “Blizzard of '88” are reconstructed from original surface weather observations. The analyses depict the meteorological evolution of the blizzard, which devastated much of the northeastern United States with 25-125-cm snowfall accumulations over a 1-3-day period, high winds, and bitter cold. As shown by the surface weather charts, the storm was associated with a slow-moving cyclone that moved northeastward from the Carolinas to near New England and then performed a loop near southern New England before moving east over the Atlantic Ocean. The interaction of the cyclone with a stationary front that extended from the storm center northward through central New England, separating cool, moist maritime air over eastern New England from very cold Canadian air over western New England and the Middle Atlantic states, may have been crucial for the development of heavy snowfall. Since weather forecasters in 1888 were taken by surprise by the development of the storm, speculations are offered whether the advancements in weather prediction techniques and the generation of computer technology that have taken place over the century following the storm could be successful in forecasting a similar event today.

Kocin, Paul J.

436

Clearance of Pneumocystis murina infection is not dependent on MyD88.  

PubMed

To determine if myeloid differentiation factor 88 (MyD88), which is necessary for signaling by most TLRs and IL-1Rs, is necessary for control of Pneumocystis infection, MyD88-deficient and wild-type mice were infected with Pneumocystis by exposure to infected seeder mice and were followed for up to 106 days. MyD88-deficient mice showed clearance of Pneumocystis and development of anti-Pneumocystis antibody responses with kinetics similar to wild-type mice. Based on expression levels of select genes, MyD88-deficient mice developed immune responses similar to wild-type mice. Thus, MyD88 and the upstream pathways that rely on MyD88 signaling are not required for control of Pneumocystis infection. PMID:24680862

Ripamonti, Chiara; Bishop, Lisa R; Yang, Jun; Lempicki, Richard A; Kovacs, Joseph A

2014-06-01

437

Microstructure, microhardness, and biocompatibility characteristics of yttrium hydroxyapatite doped with fluoride.  

PubMed

The current study focused on doping of hydroxyapatite (HA) with constant yttrium (Y(3+) ) and varying fluoride (F(-) ) compositions to investigate its microstructure, microhardness, and biocompatibility. HA was synthesized by precipitation method and sintered at 1100°C for 1 h. Y(3+) and F(-) ion dopings resulted in changes in densities. In x-ray diffraction analysis, no secondary phase formation was observed. Lattice parameters decreased upon ion substitutions. Scanning electron microscopy (SEM) results showed that ion addition resulted in smaller grains. In Fourier transform infrared spectroscopy analysis, F(-) ion substitution was confirmed. HA doped with 2.5% Y(3+) and 1% F(-) exhibited the highest microhardness. Y(3+) and F(-) ions improved Saos-2 cell proliferation on discs in Methylthiazolyldiphenyl-tetrazolium (MTT) assay. In SEM analysis, cells attached and proliferated on all disc surfaces. Alkaline phosphatase (ALP) assay showed that cell differentiation on the discs was improved by doping HA with an optimum F(-) amount. Dissolution tests revealed that structural stability of HA was improved with F(-) ion incorporation. The dissolution behavior of fluoridated samples exhibited a parallel pattern with the cell proliferation and differentiation behavior on these samples. Overall, this work shows that fluoride and yttrium cosubstitution into HA HA2.5Y1F was the most promising material for biomedical applications. PMID:21210499

Toker, S M; Tezcaner, A; Evis, Z

2011-02-01

438

Structural and optical studies of yttrium oxide nanoparticles synthesized by co-precipitation method  

SciTech Connect

Yttrium oxide (yttria) nanoparticles were successfully synthesized by co-precipitation method. As-synthesized and annealed powders were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), UV-visible (UV-vis), photoluminescence (PL) spectra and Fourier transform infrared spectrometer (FTIR). The XRD results show that the as-prepared sample has mixed phase of Y(OH){sub 3} and yttria (Y{sub 2}O{sub 3}). However, cubic yttrium oxide phase alone is found for annealed samples. The strain values are calculated from Williamson-Hall (W-H) plot for annealed samples. SEM and TEM micrographs show that the samples are composed of aggregated nanoparticles with different shapes and sizes. From the UV-vis spectra, it is found that the position of the absorption peak is shifted towards the lower wavelength side when particle size decreases. In the PL spectra, the broad emission bands are observed between 340 and 380 nm and the presence of metal oxide is confirmed by FTIR spectra.

Srinivasan, Ramasamy; Yogamalar, Rajeswari [Nanomaterials Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, Tamil Nadu (India)] [Nanomaterials Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, Tamil Nadu (India); Bose, Arumugam Chandra, E-mail: acbose@nitt.edu [Nanomaterials Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620 015, Tamil Nadu (India)

2010-09-15

439

A study on the effect factors of sol-gel synthesis of yttrium aluminum garnet nanopowders  

NASA Astrophysics Data System (ADS)

Yttrium aluminum garnet (YAG) nanopowders were synthesized by sol-gel method using aluminum nitrate, yttrium nitrate, and citric acid as starting materials, de-ionized water, ethanol, and ethylene glycol as solvents, respectively. The phase formation process, state of particle size distribution (PSD), compositions, morphological characteristics, and thermal behavior of the powders were investigated by means of x-ray diffractometry, PSD, Fourier transform infrared, transmission electronic microscope, and thermogravimetry-differential scanning calorimetry. Results indicate that the formation and characteristics of precursor gel and YAG powder, such as the rate of gelation, average particle size, and powder agglomerate state, strongly depend on the stoichiometric amount of citric acid, the solvent composition, and the precalcination process. Highly crystalline, well-dispersed YAG nanopowder was obtained by calcining at 800 °C for 2 h in the presence of citric acid to nitrate ratio of 3, ethanol solvent, and precalcination process. According to the analysis of experimental results, sol-gel chemistry, DLVO theory, and steric effect, the effects of stoichiometric amount of citric acid, solvent composition, and precalcination process on the formation and characteristics of precursor gel and YAG powder have been discussed. Meanwhile, the overall synthesis mechanism in sol-gel method has been suggested.

Yang, Lin; Lu, Tiecheng; Xu, Hui; Zhang, Wei; Ma, Benyuan

2010-03-01

440

Quantitation in PET using isotopes emitting prompt single gammas: application to yttrium-86.  

PubMed

Several yttrium-90 labelled somatostatin analogues are now available for cancer radiotherapy. After injection, a large amount of the compound is excreted via the urinary tract, while a variable part is trapped in the tumour(s), allowing the curative effect. Unfortunately, the compound may also be trapped in critical tissues such as kidney or bone marrow. As a consequence, a method for assessment of individual biodistribution and pharmacokinetics is required to predict the maximum dose that can be safely injected into patients. However, (90)Y, a pure beta(-)particle emitter, cannot be used for quantitative imaging. Yttrium-86 is a positron emitter that allows imaging of tissue uptake using a PET camera. In addition to the positron, (86)Y also emits a multitude of prompt single gamma-rays, leading to significant overestimation of uptake when using classical reconstruction methods. We propose a patient-dependent correction method based on sinogram tail fitting using an (86)Y point spread function library. When applied to abdominal phantom acquisition data, the proposed correction method significantly improved the accuracy of the quantification: the initial overestimation of background activity by 117% was reduced to 9%, while the initial error in respect of kidney uptake by 84% was reduced to 5%. In patient studies, the mean discrepancy between PET total body activity and the activity expected from urinary collections was reduced from 92% to 7%, showing the benefit of the proposed correction method. PMID:12634962

Walrand, Stéphan; Jamar, François; Mathieu, Isabelle; De Camps, Joëlle; Lonneux, Max; Sibomana, Mérence; Labar, Daniel; Michel, Christian; Pauwels, Stanislas

2003-03-01

441

Thermo-optical characteristics and concentration quenching effects in Nd3+ doped yttrium calcium borate glasses.  

PubMed

In this work we present a comprehensive study of the spectroscopic and thermo-optical properties of a set of samples with composition xNd(2)O(3)-(5-x)Y(2)O(3-)40CaO-55B(2)O(3) (0 ? x ? 1.0 mol%). Their fluorescence quantum efficiency (?) values were determined using the thermal lens technique and the dependence on the ionic concentration was analyzed in terms of energy transfer processes, based on the Förster-Dexter model of multipolar ion-ion interactions. A maximum ? = 0.54 was found to be substantially higher than for yttrium aluminoborate crystals and glasses with comparable Nd(3+) content. As for the thermo-optical properties of yttrium calcium borate, they are comparable to other well-known laser glasses. The obtained energy transfer microparameters and the weak dependence of ? on the Nd(3+) concentration with a high optimum Nd(3+) concentration put this system as a strong candidate for photonics applications. PMID:21456672

Santos, D R S; Santos, C N; de Camargo, A S S; Silva, W F; Santos, W Q; Vermelho, M V D; Astrath, N G C; Malacarne, L C; Li, M S; Hernandes, A C; Ibanez, A; Jacinto, C

2011-03-28

442

Experimental-statistical method for investigation of multicomponent yttrium garnet systems  

SciTech Connect

In the present work, some problems are discussed arising in the construction and study of a mathematical model describing the synthesis of multicomponent yttrium garnets with predetermined microwave parameters. To construct the model, the following formula was used for Ca-V YIG substituted with In and Cr: Y/sub 3-2x/Ca/sub 2x/Fe/sub 5-(x+y+z)/In/sub y/Cr/sub z/V/sub x/O/sub 12/. For this purpose, ferrogarnets were synthesized differing in x, y, and z with their values chosen so as to obtain real roots of a set of equations of the type Y/sub k/ = ..sigma..B/sub i/X/sub i/ + ..sigma..B/sub ij/X/sub i/X/sub j/ + ..sigma..B/sub ijk/X/sub i/X/sub j/X/sub k/, where Y/sub k/ are the ferrogarnet microwave properties. The graphical presentation of these solutions as triple diagrams is a very convenient way of obtaining ferrogarnets with predetermined microwave characteristics. The possibility is created of mathematically predicting and determining the influence of the different components on the yttrium ferrogarnet parameters as a function of their concentration.

Kojouharoff, V.; Ionchey, H.

1986-10-01

443

GPR88 Reveals a Discrete Function of Primary Cilia as Selective Insulators of GPCR Cross-Talk  

PubMed Central

A number of G protein-coupled receptors (GPCRs) localize to primary cilia but the functional significance of cilia to GPCR signaling remains incompletely understood. We investigated this question by focusing on the D1 dopamine receptor (D1R) and beta-2 adrenergic receptor (B2AR), closely related catecholamine receptors that signal by stimulating production of the diffusible second messenger cyclic AMP (cAMP) but differ in localization relative to cilia. D1Rs robustly concentrate on cilia of IMCD3 cells, as shown previously in other ciliated cell types, but disrupting cilia did not affect D1R surface expression or ability to mediate a concentration-dependent cAMP response. By developing a FRET-based biosensor suitable for resolving intra- from extra- ciliary cAMP changes, we found that the D1R-mediated cAMP response is not restricted to cilia and extends into the extra-ciliary cytoplasm. Conversely the B2AR, which we show here is effectively excluded from cilia, also generated a cAMP response in both ciliary and extra-ciliary compartments. We identified a distinct signaling effect of primary cilia through investigating GPR88, an orphan GPCR that is co-expressed with the D1R in brain, and which we show here is targeted to cilia similarly to the D1R. In ciliated cells, mutational activation of GPR88 strongly reduced the D1R-mediated cAMP response but did not affect the B2AR-mediated response. In marked contrast, in non-ciliated cells, GPR88 was distributed throughout the plasma membrane and inhibited the B2AR response. These results identify a discrete ‘insulating’ function of primary cilia in conferring selectivity on integrated catecholamine signaling through lateral segregation of receptors, and suggest a cellular activity of GPR88 that might underlie its effects on dopamine-dependent behaviors.

Marley, Aaron; Choy, Regina Wai-Yan; von Zastrow, Mark

2013-01-01

444

GPR88 reveals a discrete function of primary cilia as selective insulators of GPCR cross-talk.  

PubMed

A number of G protein-coupled receptors (GPCRs) localize to primary cilia but the functional significance of cilia to GPCR signaling remains incompletely understood. We investigated this question by focusing on the D1 dopamine receptor (D1R) and beta-2 adrenergic receptor (B2AR), closely related catecholamine receptors that signal by stimulating production of the diffusible second messenger cyclic AMP (cAMP) but differ in localization relative to cilia. D1Rs robustly concentrate on cilia of IMCD3 cells, as shown previously in other ciliated cell types, but disrupting cilia did not affect D1R surface expression or ability to mediate a concentration-dependent cAMP response. By developing a FRET-based biosensor suitable for resolving intra- from extra- ciliary cAMP changes, we found that the D1R-mediated cAMP response is not restricted to cilia and extends into the extra-ciliary cytoplasm. Conversely the B2AR, which we show here is effectively excluded from cilia, also generated a cAMP response in both ciliary and extra-ciliary compartments. We identified a distinct signaling effect of primary cilia through investigating GPR88, an orphan GPCR that is co-expressed with the D1R in brain, and which we show here is targeted to cilia similarly to the D1R. In ciliated cells, mutational activation of GPR88 strongly reduced the D1R-mediated cAMP response but did not affect the B2AR-mediated response. In marked contrast, in non-ciliated cells, GPR88 was distributed throughout the plasma membrane and inhibited the B2AR response. These results identify a discrete 'insulating' function of primary cilia in conferring selectivity on integrated catecholamine signaling through lateral segregation of receptors, and suggest a cellular activity of GPR88 that might underlie its effects on dopamine-dependent behaviors. PMID:23936473

Marley, Aaron; Choy, Regina Wai-Yan; von Zastrow, Mark

2013-01-01

445

Acute leukemia in middle Norway 1984-88.  

PubMed

One hundred and eight adult patients with acute leukemia were diagnosed in the middle Norwegian health region during the 5-year period 1984-88, giving an incidence rate of 4.6/100,000 per year. Nine patients had acute lymphoblastic leukemia (ALL), 93 acute myeloid leukemia (AML) and 6 patients acute leukemia without definite sub-classification. The median age of AML patients was 66 years. Thirty-five patients (median age 78 years) were found non-suitable for cytotoxic drugs, while 58 AML patients (median age 57 years) were given aplasia-inducing drug combinations according to one of three treatment programs depending on the time of diagnosis and age, in order to induce remission. Six patients were given oral drugs or low dose ara-C. All patients were followed until death or for an observation time of more than 5 years (median 7 years). The overall long term survival was found to be 12/108 for all acute leukemias, 8/93 for AML patients and 4/9 for ALL patients. For the AML patients given intravenous aplasia-inducing drugs the remission rate was 0.65, the median remission duration 12.2 months and the 5-year survival rate 0.19. For 31 AML patients, (median age 41 years), started on an intensive chemotherapy program, the 5-year survival rate was 0.32 and the relapse-free 5-year survival rate for the 22 patients entering complete remission was also 0.32. PMID:7696933

Lamvik, J; Dybedal, I; Hammerstrøm, J; Waage, A

1994-12-01

446

Tumor marker nucleoporin 88 kDa regulates nucleocytoplasmic transport of NF-{kappa}B  

SciTech Connect

Nucleoporin 88 kDa (Nup88) is a tumor marker, overexpressed in various types of cancer. In Drosophila Nup88 (mbo) was reported to selectively mediate the nucleocytoplasmic transport of NF-{kappa}B, an ubiquitous transcription factor involved in immune responses, apoptosis, and cancer. We addressed the function of Nup88 in mammalian cells. Selective depletion of Nup88 by small interfering RNA (siRNA) inhibited NF-{kappa}B-dependent reporter gene activation and the nuclear translocation of NF-{kappa}B without affecting the upstream activation pathway in NIH3T3 cells. In contrast, nuclear translocation of glucocorticoid receptor was not reduced by the depletion of Nup88. In metastatic melanoma cells overexpressing Nup88, constitutive activation of NF-{kappa}B was found both in nucleus and cytoplasm. Nup88 depletion in these cells reduced TNF-induced nuclear accumulation of NF-{kappa}B subunits. We conclude that Nup88 regulates the activity of NF-{kappa}B at the level of nucleocytoplasmic transport. Overexpression of Nup88 in tumor cells may, thus be involved in the constitutive NF-{kappa}B activation.

Takahashi, Nozomi [Rheumatology Research and Advanced Therapeutics, 272, NCMLS, Radboud University Medical Centre Nijmegen, P.O. Box 9101, Geert Grooteplein 26-28, 6500 HB Nijmegen (Netherlands)], E-mail: N.Takahashi@reuma.umcn.nl; Kilsdonk, Jeroen W.J. van [Department of Biomolecular Chemistry, IMM and NCMLS, Radboud University Nijmegen, 6500 HB Nijmegen (Netherlands); Ostendorf, Benedikt [Rheumatology Research and Advanced Therapeutics, 272, NCMLS, Radboud University Medical Centre Nijmegen, P.O. Box 9101, Geert Grooteplein 26-28, 6500 HB Nijmegen (Netherlands); Centre for Rheumatology, Department of Endocrinology, Diabetology and Rheumatology, Heinrich-Heine University of Duesseldorf, 40225 Duesseldorf (Germany); Smeets, Ruben [Rheumatology Research and Advanced Therapeutics, 272, NCMLS, Radboud University Medical Centre Nijmegen, P.O. Box 9101, Geert Grooteplein 26-28, 6500 HB Nijmegen (Netherlands); Bruggeman, Sophia W.M. [Department of Biomolecular Chemistry, IMM and NCMLS, Radboud University Nijmegen, 6500 HB Nijmegen (Netherlands); Netherlands Cancer Institute, 1066CX Amsterdam (Netherlands); Alonso, Angel [Deutsches Krebsforschungszentrum (DKFZ) Heidelberg, 69120 Heidelberg (Germany); Loo, Fons van de [Rheumatology Research and Advanced Therapeutics, 272, NCMLS, Radboud University Medical Centre Nijmegen, P.O. Box 9101, Geert Grooteplein 26-28, 6500 HB Nijmegen (Netherlands); Schneider, Matthias [Centre for Rheumatology, Department of Endocrinology, Diabetology and Rheumatology, Heinrich-Heine University of Duesseldorf, 40225 Duesseldorf (Germany); Berg, Wim B. van den [Rheumatology Research and Advanced Therapeutics, 272, NCMLS, Radboud University Medical Centre Nijmegen, P.O. Box 9101, Geert Grooteplein 26-28, 6500 HB Nijmegen (Netherlands); Swart, Guido W.M. [Department of Biomolecular Chemistry, IMM and NCMLS, Radboud University Nijmegen, 6500 HB Nijmegen (Netherlands)

2008-09-26

447

MyD88 signaling contributes to early pulmonary responses to Aspergillus fumigatus.  

PubMed

Toll-like receptors and the beta-glucan receptor, dectin-1, mediate macrophage inflammatory responses to Aspergillus fumigatus through MyD88-dependent and -independent signaling mechanisms; however, pulmonary inflammatory responses in MyD88-deficient mice challenged with A. fumigatus are poorly defined. The role of MyD88 signaling in early pulmonary inflammation and fungal clearance was evaluated in C57BL/6J wild-type (WT) and MyD88-deficient (MyD88-/-) mice. Early (<48 h) after infection, MyD88-/- mice had higher fungal burdens than those of WT mice, although fungal burdens rapidly declined (>72 h) in both. MyD88-/- mice had less consolidated inflammation, with fewer NK cells, in lung tissue early (24 h) after infection than did WT mice. At the latter time point, MyD88-/- mouse lungs were characterized by a large amount of necrotic cellular debris and fibrin, while WT lungs had organized inflammation. Although there were equivalent numbers of macrophages in WT and MyD88-/- mouse lung tissues, MyD88-/- cells demonstrated delayed uptake of green fluorescent protein-expressing A. fumigatus (GFP-Af293); histologically, MyD88-/- mouse lungs had more hyphal invasion of terminal airways and vessels, the appearance of bronchiolar epithelial cell necrosis, and necrotizing vasculitis. MyD88-/- lung homogenates contained comparatively decreased amounts of interleukin-1beta (IL-1beta), IL-6, KC, and gamma interferon and paradoxically increased amounts of tumor necrosis factor alpha and macrophage inflammatory protein 1alpha. These data indicate that the MyD88-dependent pathway mediates acute pulmonary fungal clearance, inflammation, and tissue injury very early after infection. Resolution of abnormalities within a 3-day window demonstrates the importance of redundant signaling pathways in mediating pulmonary inflammatory responses to fungi. PMID:18039832

Bretz, Camille; Gersuk, Geoff; Knoblaugh, Sue; Chaudhary, Neelkamal; Randolph-Habecker, Julie; Hackman, Robert C; Staab, Janet; Marr, Kieren A

2008-03-01

448

SORPTION OF RADIOACTIVE ISOTOPES ON PRECIPITATES. II. STRONTIUM AND YTTRIUM SORPTION ON IRON(III) AND ALUMINUM HYDROXIDES  

Microsoft Academic Search

The sorption of various strontium concentrations and yttrium traces on ; iron(III) and aluminum hydroxide and their back desorption and specifically the ; effect of hydrogen and ammonium ions on the sorption equilibrium were studied. ; It was shown that strontium is adsorbed on ferric hydroxide by exchange of the ; hydrogen ions of the hydroxide. (tr-auth);

Z. Kolarik; V. Kourim

1960-01-01

449

Cathodoluminescence properties of yttrium aluminum garnet doped with Eu{sup 2+} and Eu{sup 3+} ions  

SciTech Connect

Yttrium aluminium garnet (YAG) doped with Eu{sup 2+} and Eu{sup 3+} ions is very interesting as a phosphor for conversion of light-emitting diode light for white light sources. The europium ion occupies the structural position of yttrium in yttrium aluminium garnet and has valence state Eu{sup 3+}. Our sample was doped with Zr{sup 4+}, which is why some of the europium ions had valence state Eu{sup 2+}. As a rule, luminescence of Eu{sup 3+} ions is observed in the orange and red range of spectrum. The luminescence of Eu{sup 2+} in yttrium aluminum garnet is characterized by an intensive broad band with maximum of intensity at about 560 nm (green color). In this work, we studied the intensity and decay time dependences on europium concentration, and the influence of excitation power density on the cathodoluminescence of the sample. The most interesting result is the change of visible cathodoluminescence color in dependence on the density of the exciting power.

Trofimov, A. N. [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation)], E-mail: trofimov.pti@gmail.com; Petrova, M. A. [Khlopin Radium Institute (Russian Federation); Zamoryanskaya, M. V. [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation)

2007-05-15

450

Investigation of the role of oxide scale on Stellite 21 modified with yttrium in resisting wear at elevated temperatures  

Microsoft Academic Search

Wear damage caused by sliding contact between metallic components at elevated temperatures during service is a common problem for many mechanical systems. Considerable efforts have been made to reduce such type of wear damage. Recent studies demonstrated that the modification of metallic materials by alloying with oxygen-active elements, such as yttrium, was effective to diminish high-temperature wear. Such improvement in

Iulian Radu; D. Y. Li

2005-01-01

451

Determination of lanthanides and yttrium in rocks and minerals by atomic-absorption and flame-emission spectrometry.  

PubMed

The sensitivity of atomic-absorption and flame-emission determination of lanthanides and yttrium is improved by a factor of 2-5 when an absolute ethanol solution of the perchlorate of the metal (instead of an aqueous solution) is aspirated into a nitrous oxide-acetylene flame. Based on this, a method has been developed for accurate determination of small amounts of certain rare earths and yttrium. Lanthanum (1%) is used as a spectroscopic buffer to eliminate interferences and to enhance the sensitivities in certain determinations. Where the use of lanthanum is not practicable because of interferences (such as in the determination of praseodymium and samarium by flame emission), sodium (2000 ppm) is used as the spectroscopic buffer. Studies with synthetic solutions indicate that yttrium and most lanthanides can be directly determined in minerals without any chemical separation. With rock samples it is necessary to preconcentrate the traces of the rare earths by fluoride or oxalate precipitation with calcium as the carrier, followed by removal of calcium by hydroxide precipitation using mg amounts of iron as the carrier. The method developed has been applied to the determination of certain lanthanides and yttrium in a variety of rocks, including the Canadian reference rocks, syenites SY-1, SY-2 and SY-3, and some minerals such as britholite, cenosite, chevkinite, allanite, apatite and sphene. PMID:18961873

Sen Gupta, J G

1976-05-01

452

ANION EXCHANGE RESIN SEPARATION OF THE RARE EARTHS, YTTRIUM, AND SCANDIUM IN NITRIC ACID-METHANOL MIXTURES  

Microsoft Academic Search

The adsorption of the rare earths, yttrium, and scandium from nitric ; acid--methanol solutions was studied using strongly basic anion exchange resins. ; Adsorption measurements were made at room temperature using the column elution ; technique and employing emission spectrographic analysis. Distribution ; coefficients were a function of both the volume percentage of alcohol and of the ; nitric acid

J. P. Faris; J. W. Warton

1962-01-01

453

Comparative study of simulated zirconia inert matrix fuel stabilized with yttrium, lanthanum or praseodymium: Synthesis and leaching tests  

Microsoft Academic Search

Stabilized zirconia inert matrix fuels were synthesized with different lanthanides: yttrium, lanthanum and praseodymium. The materials were sintered in air at 1723K. Cerium, an analog element of plutonium and americium, was employed to simulate a minor actinide in the process development, owing to the high activity of minor actinides. For each matrix, several properties, such as crystalline structure, density, microhardness,

N. Kamel; H. Aït-Amar; M. Taouinet; C. Benazzouz; Z. Kamel; H. Fodil-Cherif; S. Telmoune; R. Slimani; A. Zahri; D. Sahel

2006-01-01

454

Chaos generators based on yttrium-iron garnet films for communication systems with a chaotic synchronous response  

NASA Astrophysics Data System (ADS)

This Letter reports the development of a directly chaotic communication system, in which chaos generators are used that are based on yttrium-iron garnet (YIG) films. YIG-based chaos generators provide a stable chaotic synchronous response and almost ideal masking of the signal with high communication reliability and quality. Characteristics of these generators are compared with conventional chaos generators.

Mezin, N. I.; Glushchenko, A. A.; Kuzovlev, Yu. E.

2012-10-01

455

Thermoanalytical studies of coprecipitated hydroxides of yttrium and aluminum for preparation of rare-earth doped YAG phosphors  

Microsoft Academic Search

Yttrium-aluminum garnets (YAG) doped with a rare-earth element, including terbium (Tb), thulium (Tm), and Erbium (Er) produce the phosphorescence. YAGs may be synthesized by baking hydroxides of their constituents at a high temperature. No flux is required and the temperature of the solid state synthesis may be decreased to only 1150 degrees Celsius when the hydroxides are coprecipitated. We report

Marija S. Scholl

1996-01-01

456

Mycobacterium bovis BCG Triggered MyD88 Induces miR-124 Feedback Negatively Regulates Immune Response in Alveolar Epithelial Cells  

PubMed Central

The emerging roles of microRNAs (miRNAs) and pulmonary epithelial cells in regulating the immune response against microbial invasion has attracted increasing attention in recent years, however, the immunoregulatory roles of miRNAs in the pulmonary epithelial cells in response to mycobacterial infection has not been fully demonstrated. In this study, we show that miR-124 expression is induced upon Mycobacterium bovis Bacillus Calmette-Guerin (BCG) infection in A549 alveolar epithelial cells and murine lungs. miR-124 is able to modulate Toll-like receptor (TLR) signaling in A459 cells. In this regard, multiple components, including TLR6, myeloid differentiation factor 88 (MyD88), TNFR-associated factor 6 and tumor necrosis factor-? of the TLR signaling cascade are directly regulated by miR-124 in response to BCG stimulation. In addition, miR-124 expression was induced upon MyD88 overexpression and/or BCG stimulation, while silencing MyD88 expression by small interfering RNA dramatically down-regulated miR-124 transcription in A549 cells. These results indicate an underlying negative feedback mechanism between miR-124 and MyD88 in alveolar epithelial cells to prevent an excessive inflammatory response during mycobacterial infection. These observations suggest that miR-124 is a potential target for preventive and therapeutic intervention against the pulmonary tuberculosis, an infectious disease caused by Mycobacterium tuberculosis infection.

Zeng, Jin; Wu, Xiaoling; Liu, Xiaoming; Wang, Yujiong

2014-01-01

457

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

458

Intestinal receptors for adhesive fimbriae of enterotoxigenic Escherichia coli (ETEC) K88 in swine – a review  

Microsoft Academic Search

Determining the structure of the intestinal receptor for enterotoxigenic Escherichia coli (ETEC) K88 fimbriae will make it possible to develop new strategies to prevent K88+ ETEC-induced disease in pigs. Putative\\u000a K88 adhesin receptors have been identified in both intestinal brush border and mucus preparations as either glycoproteins\\u000a or glycolipids. Proteins with sizes of 25, 35, 40–42, 60, and 80?kDa in

L. Z. Jin; X. Zhao

2000-01-01

459

ISAC targets  

NASA Astrophysics Data System (ADS)

The TRIUMF-ISAC radioactive ion beam facility was designed and constructed to allow irradiation of thick targets with up to 100 A proton beam intensities. Since beginning operation in 1998, beam intensities on ISAC targets have progressively increased toward the 100 A design limit. Routine operation with p + intensities up to 75 A is currently possible for both refractory metal target materials and for composite metal carbide materials; full 99 A p + intensity has been achieved for Nb foil target material. Consideration must be given to the beam power deposition, the power dissipation and the limiting temperature criteria of each target material. Increased beam power dissipation has been achieved by modifying target materials and target containers. Increasing irradiation currents have produced benefits, drawbacks and unexpected results for ISOL operations.

Dombsky, M.; Kunz, P.

2014-01-01

460

Synthesis, crystal structure of a novel yttrium (III) coordination compound supported by typical plenary Dawson cluster  

Microsoft Academic Search

A novel yttrium (III) coordination compound supported by plenary Dawson cluster, [Y(NMP)5(H2O)2] [Y(NMP)4(H2O)2(P2Mo18O62)] · NMP · 5.5 H2O, (NMP = N-methyl-2-pyrrolidone) has been synthesized by reaction of ?-H6P2Mo18O62 · nH2O, Y2O3 and NMP in water. The results of the single crystal X-ray diffraction analyses show the title compound forms a neutral and\\u000a discrete cluster through [P2Mo18O62]6?] being coordinated to [Y(NMP)4(H2O)2]3+

Jingping Wang; Meilin Wei; Jingyang Niu

2003-01-01

461

Exploratory combustion synthesis: amorphous indium yttrium oxide for thin-film transistors.  

PubMed

We report the implementation of amorphous indium yttrium oxide (a-IYO) as a thin-film transistor (TFT) semiconductor. Amorphous and polycrystalline IYO films were grown via a low-temperature solution process utilizing exothermic "combustion" precursors. Precursor transformation and the IYO films were analyzed by differential thermal analysis, thermogravimetric analysis, X-ray diffraction, atomic force microscopy, X-ray photoelectron spectroscopy, and optical transmission, which reveal efficient conversion to the metal oxide lattice and smooth, transparent films. a-IYO TFTs fabricated with a hybrid nanodielectric exhibit electron mobilities of 7.3 cm(2) V(-1) s(-1) (T(anneal) = 300 °C) and 5.0 cm(2) V(-1) s(-1) (T(anneal) = 250 °C) for 2 V operation. PMID:22625409

Hennek, Jonathan W; Kim, Myung-Gil; Kanatzidis, Mercouri G; Facchetti, Antonio; Marks, Tobin J

2012-06-13

462

Optical properties of amorphous, erbium-doped yttrium alumino-borate thin films  

NASA Astrophysics Data System (ADS)

In this paper, we report on the optical characterizations of erbium-doped yttrium alumino-borate glassy thin films prepared by the polymeric precursor and sol-gel routes and the spin-coating technique. High quality planar waveguides were produced by a multilayer processing of Y 1-xEr xAl 3(BO 3) 4 compositions with x = 0.02, 0.05, 0.10, 0.30, and 0.50. Their optical properties were investigated using transmission, photoluminescence, and m-lines spectroscopy, whereas high resolution scanning electron microscopy (HR-SEM) was applied to check film thickness and surface homogeneity. The refractive indices determined from transmission and m-lines spectroscopy are in good agreement just like the film thickness measured by HR-SEM and transmission spectroscopy. We observed low propagation losses, together with efficient photoluminescence emission for polymeric precursor thin films, involving low cost and environment friendly reactants.

Maia, L. J. Q.; Fick, J.; Hernandes, A. C.; Mastelaro, V. R.; Ibanez, A.

2012-02-01

463

Linear and Nonlinear Analysis of Spatio-Temporal Chaos in Yttrium Iron Garnet Films  

NASA Astrophysics Data System (ADS)

The spatio-temporal chaotic behavior of magnetic spin wave states in Yttrium Iron Garnet films is experimentally studied and analyzed. A 37 micron sample is placed in a DC magnetic field to align the atomic spins, which are then excited at resonant frequencies. Chaotic spin wave states result when surface modes of the film begin to interact above an excitation power threshold. We study the spatial correlation of the chaotic states of the sample by monitoring the magnetic moment at two positions on the film surface. The magnetic moments are detected by using coaxial loops mounted near the film surface and we can obtain time series corresponding to the signals at each position. We have analyzed the correlation between the two signals using both linear methods and a novel nonlinear analysis technique. This nonlinear analysis is non-parametric and is based solely on the statistics of the two time series.

Goodridge, Chris; Carroll, Tom; Pecora, Lou; Rachford, Fred

2000-03-01

464

SAXS and TEM investigation of ion tracks in neodymium-doped yttrium aluminium garnet  

NASA Astrophysics Data System (ADS)

Neodymium-doped yttrium aluminium garnet (Nd:Y3Al5O12 or Nd:YAG) crystals were irradiated with 2.2 GeV 197Au ions. Ion track formation was investigated using synchrotron based small angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). Cylindrical ion tracks consisted of an amorphous core with sharp boundaries within the crystalline matrix. The SAXS results, modelled as long cylindrical tracks, provided a constant track density that is 0.6 ± 0.3% different to that of the surrounding matrix. The average track radii determined by both techniques were in excellent agreement, 4.4 ± 0.1 nm from SAXS and 4.4 ± 0.5 nm from TEM. A comparison with previous results of ion tracks in YAG indicates that the track radius is not affected by the presence of 1 mol% Nd dopant.

Rodriguez, M. D.; Li, W. X.; Chen, F.; Trautmann, C.; Bierschenk, T.; Afra, B.; Schauries, D.; Ewing, R. C.; Mudie, S. T.; Kluth, P.

2014-05-01

465

Raman and Infrared Spectroscopy of Yttrium Aluminum Borate Glasses and Glass-ceramics  

NASA Technical Reports Server (NTRS)

Raman spectra of glasses and glass-ceramics in the Y2O3-Al2O3-B2O3 system are reported. Glasses with B2O3 contents ranging from 40 to 60 mole percent were prepared by melting 20 g of the appropriate oxide or carbonate powders in alumina crucibles at 1400 C for 45 minutes. Subsequent heat treatments of the glasses at temperatures ranging from 600 to 800 C were performed in order to induce nucleation and crystallization. It was found that Na2CO3 added to the melt served as a nucleating agent and resulted in uniform bulk crystallization. The Raman spectra of the glasses are interpreted primarily in terms of vibrations of boron - oxygen structural groups. Comparison of the Raman spectra of the glass-ceramic samples with spectra of aluminate and borate crystalline materials reveal that these glasses crystallize primarily as yttrium aluminum borate, YAl3(BO3)4.

Bradley, J.; Brooks, M.; Crenshaw, T.; Morris, A.; Chattopadhyay, K.; Morgan, S.

1998-01-01

466

Polycrystalline yttrium aluminum garnet (YAG) for IR transparent missile domes and windows  

NASA Astrophysics Data System (ADS)

Polycrystalline Yttrium Aluminum Garnet (YAG) is being considered as an attractive material candidate for IR transparent missile domes and reconnaissance windows, due to its superior optical clarity and mechanical properties compared to the incumbent material choices. YAG possesses a very uniform index of refraction with minimal variation. Its fracture strength, hardness, and toughness also rank high among various other optically transparent materials and can be optimized further through grain size minimization. Polycrystalline YAG has been in development for several years at Raytheon for laser gain and IR transparency applications. Recent advances in optical loss characterization and optimization, scale-up efforts, and the fabrication of non-planar geometries such as hemispherical domes will be presented. In addition, the YAG material trade study conducted to date on thermal, optical, mechanical properties are discussed.

Huie, J. C.; Dudding, C. B.; McCloy, J.

2007-05-01

467

An organically templated yttrium fluoride with a ‘Super-Diamond’ structure  

NASA Astrophysics Data System (ADS)

An organically templated yttrium fluoride has been prepared hydrothermally and characterised by X-ray powder diffraction. The crystal structure of [C 3N 2H 12] 0.5[Y 3F 10] may be regarded as a 'Super-Diamond' framework, space group Fd3¯m, a=15.4817(1) Å, where each carbon atom site of the diamond structure is replaced by a polyhedral [Y 6F 8F 24/2] 2- unit. The basic framework type is isostructural with the known phase (H 3O)[Yb 3F 10]·H 2O. The novelty in the present case lies in the use of the organic structure-directing agent 1,3-diaminopropane.

Stephens, Nicholas F.; Lightfoot, Philip

2007-01-01

468

Hydrogen gas sensor based on palladium and yttrium alloy ultrathin film.  

PubMed

Compared with the other hydrogen sensors, optical fiber hydrogen sensors based on thin films exhibits inherent safety, small volume, immunity to electromagnetic interference, and distributed remote sensing capability, but slower response characteristics. To improve response and recovery rate of the sensors, a novel reflection-type optical fiber hydrogen gas sensor with a 10 nm palladium and yttrium alloy thin film is fabricated. The alloy thin film shows a good hydrogen sensing property for hydrogen-containing atmosphere and a complete restorability for dry air at room temperature. The variation in response value of the sensor linearly increases with increased natural logarithm of hydrogen concentration (ln[H(2)]). The shortest response time and recovery response time to 4% hydrogen are 6 and 8 s, respectively. The hydrogen sensors based on Pd(0.91)Y(0.09) alloy ultrathin film have potential applications in hydrogen detection and measurement. PMID:23278019

Yi, Liu; You-Ping, Chen; Han, Song; Gang, Zhang

2012-12-01

469

Chemical solution deposition of ferroelectric yttrium-doped hafnium oxide films on platinum electrodes  

NASA Astrophysics Data System (ADS)

Ferroelectric hafnium oxide films were fabricated by chemical solution deposition with a remnant polarization of >13 ?C/cm2. The samples were prepared with 5.2 mol. % yttrium-doping and the thickness varied from 18 nm to 70 nm. The hafnium oxide layer was integrated into a metal-insulator-metal capacitor using platinum electrodes. Due to the processing procedure, no thickness dependence of the ferroelectric properties was observed. To confirm the ferroelectric nature of the deposited samples, polarization, capacitance, and piezoelectric displacement measurements were performed. However, no evidence of the orthorhombic phase was found which has been proposed to be the non-centrosymmetric, ferroelectric phase in HfO2.

Starschich, S.; Griesche, D.; Schneller, T.; Waser, R.; Böttger, U.

2014-05-01

470

In vitro evaluation of erbium, chromium:yttrium–scandium–gallium–garnet laser-treated enamel demineralization  

Microsoft Academic Search

This study evaluated the effect of different parameters of erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser\\u000a irradiation on enamel mineral loss in a simulated caries model. Forty-five enamel samples obtained from third molar teeth\\u000a (3 mm×?3 mm) were randomly divided into five groups (n?=?9): G1—Er,Cr:YSGG laser at 0.25 W, 20 Hz, 2.8 J\\/cm2; G2—Er,Cr:YSGG laser at 0.50 W, 20 Hz, 5.7 J\\/cm2; G3—Er,Cr:YSGG laser at 0.75 W, 20 Hz, 8.5 J\\/cm2; G4—sodium fluoride (NaF)

Patrícia M. de Freitas; Marcia Rapozo-Hilo; Carlos de P. Eduardo; John D. B Featherstone

2010-01-01

471

Significant improvement in electronic properties of transparent amorphous indium zinc oxide through yttrium doping  

NASA Astrophysics Data System (ADS)

One big challenge in transparent conducting oxides (TCOs) is to achieve high conductivity and mobility at a low processing temperature. Although optimized conductivity has been achieved in indium zinc oxide (IZO) without doping, it is still interesting to find whether doping can improve conductivity of IZO further. In this paper, we report a low processing temperature achievement of high conductivity and mobility of IZO through yttrium (Y) doping. We found that with different Y doping levels, room temperature fabricated amorphous IZO (a-IZO) samples can be controlled to exhibit either metallic or semiconductor characteristics. Y2O3 is demonstrated to be an effective doping source to achieve conductivity 300% higher than the non-doped IZO sample. Anomalously improved mobility of certain Y2O3-doped IZO samples compared with the non-doped IZO sample is found and analyzed. Besides, a low-temperature resistivity anomaly (semiconductor metal transition) phenomenon is observed and discussed.

Sun, Jian; Yu, Zhigen; Huang, Yanhua; Xia, Yijie; Lai, Weng Soon; Gong, Hao

2014-04-01

472

8-Quinolinolate complexes of yttrium and ytterbium: molecular arrangement and fragmentation under laser impact.  

PubMed

New 8-quinolinolate (Q) complexes of yttrium (1) and ytterbium (2) were synthesized by the reactions of Cp3Y and Yb[N(SiMe3)2]3 with 3 equiv. of 8-hydroxyquinoline in a DME solution. Single crystal X-ray analysis revealed the trinuclear molecular structure of the compounds Ln3Q9. The LDI-TOFMS investigation displayed that under the laser impact the compounds split off Q(-) anions to give Ln3Q8(+), Ln2Q5(+) and LnQ3(+) moieties. In the negative mode spectra the anions Q(-) and LnQ4(-) were observed. The DFT calculations showed the decreased stability of cationic Ln-quinolinolate as compared with their anionic counterparts. Complex 2 which is used as an emitter in a three-layer OLED displayed a metal-centered emission at 979 nm and an intensity of 50 ?W cm(-2) at 15.5 V. PMID:24048370

Baranov, Evgeny V; Fukin, Georgy K; Balashova, Tatyana V; Pushkarev, Anatoly P; Grishin, Ivan D; Bochkarev, Mikhail N

2013-11-28

473

Synthesis and structure of alkali metal `ate' complexes in the yttrium\\/2,6-dimethylphenoxide system  

Microsoft Academic Search

The neutral complex Y(OAr)3(THF)3, 1, (Ar=C6H3Me2-2,6) prepared from Y[N(SiMe3)2]3 and HOAr, can be converted to the ionic `ate' salts [(DME)Li]2[(?-OAr)4Y(OAr)], 2, [(THF)3K][(?-OAr)2Y(OAr)2(THF)2], 3, and [Na(THF)6][(C5Me5)Y(OAr)3], 4, with the alkali metal reagents LiOAr, KOAr, and NaC5Me5 (DME=dimethoxyethane). The yttrium center in complex 2 is square pyramidal with the terminal aryloxide ligand in the apical position and no agostic interactions. The octahedral

William J. Evans; Mohammad A. Ansari; Joseph W. Ziller; Saeed I. Khan

1998-01-01

474

Mössbauer spectroscopic study of spin reorientation in Mn-substituted yttrium orthoferrite  

NASA Astrophysics Data System (ADS)

The first-order spin-reorientation transition in the Mn-substituted yttrium orthoferrites, YFe1-xMnxO3 (x = 0.1, 0.15 and 0.2), has been investigated using 57Fe Mössbauer spectroscopy. Owing to its large anisotropy, substitution of Mn3+ ions in YFeO3 induces a spin-reorientation transition from the low-temperature antiferromagnetic state to a high-temperature weak ferromagnetic state. With increasing x, the spin-reorientation transition temperature (TSR) increases whereas the Néel temperature (TN) decreases. Analysis of the Mössbauer spectra unambiguously confirms the occurrence of spin reorientation relative to crystal axes. At a given temperature, the mean hyperfine field decreases with the increasing Mn concentration. The variation of canting angle with temperature for YFe0.85Mn0.15O3 has been estimated.

Sundarayya, Y.; Mandal, P.; Sundaresan, A.; Rao, C. N. R.

2011-11-01

475

Mössbauer spectroscopic study of spin reorientation in Mn-substituted yttrium orthoferrite.  

PubMed

The first-order spin-reorientation transition in the Mn-substituted yttrium orthoferrites, YFe(1-x)Mn(x)O(3) (x = 0.1, 0.15 and 0.2), has been investigated using (57)Fe Mössbauer spectroscopy. Owing to its large anisotropy, substitution of Mn(3+) ions in YFeO(3) induces a spin-reorientation transition from the low-temperature antiferromagnetic state to a high-temperature weak ferromagnetic state. With increasing x, the spin-reorientation transition temperature (T(SR)) increases whereas the Néel temperature (T(N)) decreases. Analysis of the Mössbauer spectra unambiguously confirms the occurrence of spin reorientation relative to crystal axes. At a given temperature, the mean hyperfine field decreases with the increasing Mn concentration. The variation of canting angle with temperature for YFe(0.85)Mn(0.15)O(3) has been estimated. PMID:21997328

Sundarayya, Y; Mandal, P; Sundaresan, A; Rao, C N R

2011-11-01