Effect of A-site deficiency in LaMn_0_._9Co_0_._1O_3 perovskites on their catalytic performance for soot combustion

International Nuclear Information System (INIS)

Dinamarca, Robinson; Garcia, Ximena; Jimenez, Romel; Fierro, J.L.G.; Pecchi, Gina

2016-01-01

Highlights: • A-site defective perovskites increases the oxidation state of the B-cation. • Not always non-stoichiometric perovskites exhibit higher catalytic activity in soot combustion. • The highly symmetric cubic crystalline structure diminishes the redox properties of perovskites. - Abstract: The influence of lanthanum stoichiometry in Ag-doped (La_1_-_xAg_xMn_0_._9Co_0_._1O_3) and A-site deficient (La_1_-_xMn_0_._9Co_0_._1O_3_-_δ) perovskites with x equal to 10, 20 and 30 at.% has been investigated in catalysts for soot combustion. The catalysts were prepared by the amorphous citrate method and characterized by XRD, nitrogen adsorption, XPS, O_2-TPD and TPR. The formation of a rhombohedral excess-oxygen perovskite for Ag-doped and a cubic perovskite structure for an A-site deficient series is confirmed. The efficient catalytic performance of the larger Ag-doped perovskite structure is attributed to the rhombohedral crystalline structure, Ag_2O segregated phases and the redox pair Mn"4"+/Mn"3"+. A poor catalytic activity for soot combustion was observed with A-site deficient perovskites, despite the increase in the redox pair Mn"4"+/Mn"3"+, which is attributed to the cubic crystalline structure.

Thermochemical studies on two alkyl-bulky substituted xanthene derivatives: 9,9-dimethylxanthene and 2,7-di-tert-butyl-9,9-dimethylxanthene

International Nuclear Information System (INIS)

Freitas, Vera L.S.; Gomes, José R.B.; Ribeiro da Silva, Maria D.M.C.

2017-01-01

Highlights: • Energetic characterization of two alkyl-bulky substituted xanthene derivatives. • Massic energies of combustion of xanthene derivatives. • Enthalpies of sublimation determined by vacuum drop microcalorimetry technique. • Temperature-vapour pressure dependence by mass-loss Knudsen effusion method. • Gas-phase enthalpies of formation of alkyl xanthene derivatives. - Abstract: Thermodynamic properties of 9,9-dimethylxanthene and 2,7-di-tert-butyl-9,9-dimethylxanthene for the condensed and gas states were derived from experimental and computational studies. Static-bomb combustion calorimetry, vacuum drop microcalorimetry and the Knudsen effusion techniques were used. Computational calculations of the enthalpies of hypothetical reactions in the gaseous phase, using the G3(MP2)//B3LYP composite method, were performed for the two xanthene derivatives. Natural bond orbital (NBO) calculations were also performed to ascertain the structure and reactivity of these compounds. The energetic effects caused by replacing hydrogen atoms in the xanthene moiety by methyl and tert-butyl groups yielding 9,9-dimethylxanthene and 2,7-di-tert-butyl-9,9-dimethylxanthene species were determined from direct comparison of their standard (p o = 0.1 MPa) molar enthalpies of formation in the gaseous phase, at T = 298.15 K.

Synthesis of SrBi{sub 2}Ta{sub 2}O{sub 9} by combustion synthesis; Obtencao do SrBi{sub 2}Ta{sub 2}O{sub 9} utilizando a sintese por combustao

Energy Technology Data Exchange (ETDEWEB)

Oliveira, F.F.; Bergmann, C.P. [Universidade Federal do Rio Grande do Sul (LACER/UFRGS), Porto Alegre, RS (Brazil). Dept. de Materiais. Lab. de Materiais Ceramicos; Sousa, V.C. [Universidade Federal do Rio Grande do Sul (LABIOMAT/UFRGS), Porto Alegre, RS (Brazil). Dept. de Materiais. Lab. de Materiais de Biomateriais

2009-07-01

The combustion synthesis is a low cost technique for obtaining homogeneous nanostructured compounds with high purity. The ferroelectric memory devices have been widely studied by the electronics industry by presenting high-speed recording, read and rewrite. The PZT, in the form of thin films, is the ceramic materials most used for this purpose, but it presents ferroelectric fatigue. The SrBi{sub 2}Ta{sub 2}O{sub 9} has a high cycle enables the recording which is good applicability in the PZT. Therefore, this work aims to obtain the SrBi{sub 2}Ta{sub 2}O{sub 9} using the combustion synthesis and urea as a reducing agent. The characterization of the powder was realized used the technique of x-ray diffraction (XRD) to determine the phases present and to evaluate surface area by the BET method. The powder obtained after synthesis showed low crystallinity presenting just the BiOCl like the crystalline phase present, but heat treatment at 800 deg C for 2 hours was sufficient for the formation of SrBi{sub 2}Ta{sub 2}O{sub 9} . (author)

Eu9Cd4-xCM2+x-y□ySb9: Ca9Mn4Bi9-type structure stuffed with coinage metals (Cu, Ag, and Au) and the challenges with classical valence theory in describing these possible zintl phases.

Science.gov (United States)

Kazem, Nasrin; Hurtado, Antonio; Klobes, Benedikt; Hermann, Raphaël P; Kauzlarich, Susan M

2015-02-02

The synthesis, crystal structure, magnetic properties, and europium Mössbauer spectroscopy of the new members of the 9-4-9 Zintl family of Eu(9)Cd(4-x)CM(2+x-y)□(y)Sb(9) (CM = coinage metal: Au, Ag, and Cu) are reported. These compounds crystallize in the Ca(9)Mn(4)Bi(9) structure type (9-4-9) with the 4g interstitial site almost half-occupied by coinage metals; these are the first members in the 9-4-9 family where the interstitial positions are occupied by a monovalent metal. All previously known compounds with this structure type include divalent interstitials where these interstitials are typically the same as the transition metals in the anionic framework. Single-crystal magnetic susceptibility data indicate paramagnetic behavior for all three compounds with antiferromagnetic ordering below 10 K (at 100 Oe) that shifts to lower temperature (x)CM(2+x-y)□(y)Sb(9) at 50 and 6.5 K in order to evaluate the valence of Eu cations. Although the Zintl formalism states that the five crystallographically distinct Eu sites in Eu(9)Cd(4-x)CM(2+x-y)□(y)Sb9 should bear Eu(2+), the Mössbauer spectral isomer shifts are clearly indicative of both 2+ and 3+ valence of the Eu cations with the Cu- and Au-containing compounds showing higher amounts of Eu(3+). This electronic configuration leads to an excess of negative charge in these compounds that contradicts the expected valence-precise requirement of Zintl phases. The spectra obtained at 6.5 K reveal magnetic ordering for both Eu(2+) and Eu(3+). The field dependence of Eu(2+) indicates two distinct magnetic sublattices, with higher and lower fields, and of a small field for Eu(3+). The site symmetry of the five Eu sites is not distinguishable from the Mössbauer data.

The analysis of the 3d8, 3d74p and 3p53d9 configurations of Se IX

International Nuclear Information System (INIS)

Kleef, T.A.M. van; Uylings, P.; Joshi, Y.N.; Podobedova, L.I.; Ryabtsev, A.N.

1984-01-01

The ninth spectrum of selenium (Se IX) was photographed in the region 100-140 A on a variety of grazing incidence spectrographs using a triggered spark or an open spark as sources. On the basis of these measurements all levels of the 3d 8 configuration, 11 out of 12 levels of the 3p 5 3d 9 configuration and 95 out of 110 levels of the 3d 7 4p configuration have been established. A strong configuration interaction exists between the two odd configurations. Least-squares-fit and Hartree-Fock parameter calculations support the analysis. Two hundred and twenty-five (225) lines have been classified in Se IX. (orig.)

Synthesis of iridacarborane halide complexes [(η-9-SMe2-7,8-C2B9H10)IrX2]2 (X=Cl, Br, I)

International Nuclear Information System (INIS)

Kudinov, A.R.; Perekalin, D.S.; Petrovskij, P.V.

2001-01-01

By interaction between Na[9-SMe 2 -7,8-C 2 B 9 H 10 ] and [(Cod)IrCl] 2 (Cod - cycloocta-1,5-diene) iridium complex (η-9-SMe 2 -7,8-C 2 B 9 H 10 )Ir(Cod), which under the action of anhydrous hydrohalogenic acids HX (X=Cl, Br, I) yields iridacarborane halide complexes [(η-9-SMe 2 -7,8-C 2 B 9 H 10 )IrX 2 ] 2 , being analogs of cyclopentadienyl complexes [(C 5 Me 5 )IrX 2 ] 2 . The complexes prepared were characterized on the basis of data of elementary analysis and 1 H, 11 B NMR spectra [ru

Electrophysiology of Cranial Nerve Testing: Cranial Nerves IX and X.

Science.gov (United States)

Martinez, Alberto R M; Martins, Melina P; Moreira, Ana Lucila; Martins, Carlos R; Kimaid, Paulo A T; França, Marcondes C

2018-01-01

The cranial nerves IX and X emerge from medulla oblongata and have motor, sensory, and parasympathetic functions. Some of these are amenable to neurophysiological assessment. It is often hard to separate the individual contribution of each nerve; in fact, some of the techniques are indeed a composite functional measure of both nerves. The main methods are the evaluation of the swallowing function (combined IX and X), laryngeal electromyogram (predominant motor vagal function), and heart rate variability (predominant parasympathetic vagal function). This review describes, therefore, the techniques that best evaluate the major symptoms presented in IX and X cranial nerve disturbance: dysphagia, dysphonia, and autonomic parasympathetic dysfunction.

Towards a formal semantics for Ada 9X

Science.gov (United States)

Guaspari, David; Mchugh, John; Wolfgang, Polak; Saaltink, Mark

1995-01-01

The Ada 9X language precision team was formed during the revisions of Ada 83, with the goal of analyzing the proposed design, identifying problems, and suggesting improvements, through the use of mathematical models. This report defines a framework for formally describing Ada 9X, based on Kahn's 'natural semantics', and applies the framework to portions of the language. The proposals for exceptions and optimization freedoms are also analyzed, using a different technique.

Effect of A-site deficiency in LaMn{sub 0.9}Co{sub 0.1}O{sub 3} perovskites on their catalytic performance for soot combustion

Energy Technology Data Exchange (ETDEWEB)

Dinamarca, Robinson [Department of Physical Chemistry, Faculty of Chemical Sciences, University of Concepción, Concepción (Chile); Garcia, Ximena; Jimenez, Romel [Department of Chemical Engineering, Faculty of Engineering, University of Concepción, Concepción (Chile); Fierro, J.L.G. [Instituto de Catálisis y Petroleoquímica, CSIC, Cantoblanco, 28049 Madrid (Spain); Pecchi, Gina, E-mail: gpecchi@udec.cl [Department of Physical Chemistry, Faculty of Chemical Sciences, University of Concepción, Concepción (Chile)

2016-09-15

Highlights: • A-site defective perovskites increases the oxidation state of the B-cation. • Not always non-stoichiometric perovskites exhibit higher catalytic activity in soot combustion. • The highly symmetric cubic crystalline structure diminishes the redox properties of perovskites. - Abstract: The influence of lanthanum stoichiometry in Ag-doped (La{sub 1-x}Ag{sub x}Mn{sub 0.9}Co{sub 0.1}O{sub 3}) and A-site deficient (La{sub 1-x}Mn{sub 0.9}Co{sub 0.1}O{sub 3-δ}) perovskites with x equal to 10, 20 and 30 at.% has been investigated in catalysts for soot combustion. The catalysts were prepared by the amorphous citrate method and characterized by XRD, nitrogen adsorption, XPS, O{sub 2}-TPD and TPR. The formation of a rhombohedral excess-oxygen perovskite for Ag-doped and a cubic perovskite structure for an A-site deficient series is confirmed. The efficient catalytic performance of the larger Ag-doped perovskite structure is attributed to the rhombohedral crystalline structure, Ag{sub 2}O segregated phases and the redox pair Mn{sup 4+}/Mn{sup 3+}. A poor catalytic activity for soot combustion was observed with A-site deficient perovskites, despite the increase in the redox pair Mn{sup 4+}/Mn{sup 3+}, which is attributed to the cubic crystalline structure.

Ada 9X overview

Science.gov (United States)

Weller, David G.

1992-01-01

The current version of Ada has been an ANSI standard since 1983. In 1988, the Ada Joint Program Office was tasked with reevaluating the language and proposing changes to the standard. Since that time, the world has seen a tremendous explosion in object-oriented languages, as well as other growing fields such as distributed computing and support for very large software systems. The speaker will discuss new features being added to the next version of Ada, currently called Ada 9X, and what transition issues must be considered for current Ada projects.

Ares I-X: First Flight of a New Generation

Science.gov (United States)

Davis, Stephan R.; Askins, Bruce R.

2010-01-01

The Ares I-X suborbital development flight test demonstrated NASA s ability to design, develop, launch and control a new human-rated launch vehicle (Figure 14). This hands-on missions experience will provide the agency with necessary skills and insights regardless of the future direction of space exploration. The Ares I-X team, having executed a successful launch, will now focus on analyzing the flight data and extracting lessons learned that will be used to support the development of future vehicles.

Variations among Japanese of the factor IX gene (F9) detected by PCR-denaturing gradient gel electrophoresis

Energy Technology Data Exchange (ETDEWEB)

Satoh, Chiyoko; Takahashi, Norio; Asakawa, Junichi; Hiyama, Keiko; Kodaira, Meiko (Radiation Effects Research Foundation, Hiroshima (Japan))

1993-01-01

In the course of feasibility studies to examine the efficiencies and practicalities of various techniques for screening for genetic variations, the human coagulation factor IX (F9) genes of 63 Japanese families were examined by PCR-denaturing gradient gel electrophoresis (PCR-DGGE). Four target sequences with lengths of 983-2,891 bp from the F9 genes of 126 unrelated individuals from Hiroshima and their 100 children were amplified by PCR, digested with restriction enzymes to approximately 500-bp fragments, and examined by DGGE - a total of 6,724 bp being examined per individual. GC-rich sequences (GC-clamps) of 40 bp were attached to both ends of the target sequences, as far as was feasible. Eleven types of new nucleotide substitutions were detected in the population, none of which produced RFLPs or caused hemophilia B. By examining two target sequences in a single lane, approximately 8,000 bp in a diploid individual could be examined. This approach is very effective for the detection of variations in DNA and is applicable to large-scale population studies. 46 refs., 3 figs., 1 tab.

Broadband X-ray spectra of the ultraluminous x-ray source Holmberg IX X-1 observed with NuSTAR, XMM-Newton, and Suzaku

DEFF Research Database (Denmark)

Walton, D. J.; Harrison, F. A.; Grefenstette, B. W.

2014-01-01

We present results from the coordinated broadband X-ray observations of the extreme ultraluminous X-ray source Holmberg IX X-1 performed by NuSTAR, XMM-Newton, and Suzaku in late 2012. These observations provide the first high-quality spectra of Holmberg IX X-1 above 10 keV to date, extending the...

Magnetic properties of Nd-deficient manganites Nd0.9-xCaxMnOy

International Nuclear Information System (INIS)

Troyanchuk, I.O.; Khomchenko, V.A.; Pastushonok, S.N.; Novitsky, O.A.; Pavlov, V.I.; Szymczak, H.

2006-01-01

X-ray diffraction and magnetic studies of neodymium deficient Nd 0.9-x Ca x MnO y (0= 0.9 MnO y samples have been prepared in the 2.85= g -orbitals of manganese ions. Composition with y=2.85 is antiferromagnet with T N =85K, whereas for more oxidized Nd 0.9 MnO y samples a coexistence of antiferromagnetic and ferromagnetic phases is suggested. Low-temperature magnetic phase transition which is accompanied by a negative magnetization appearance has been found in the Nd 0.9 MnO 2.90 compound. Magnetic behavior of Nd 0.9-x Ca x MnO y (0.1= 1-x Ca x MnO 3 series. Properties of the Nd 0.9-x Ca x MnO y (0=< x=<0.4) solid solutions are in agreement with a hypothesis according to which a part of Nd ions can be substituted by Mn ions

ZAP study of collective effects in PEP: 9 x 9 collider optics

International Nuclear Information System (INIS)

Corbett, W.J.

1990-02-01

In this note, single and multi-bunch collective instabilities are considered for PEP operating a 9 x 9 bunch configuration. The lattice is based on a vertically separated beam 'pretzel' design which allows for collisions at the TPC (IR2) only. Threshold current levels and linear instability growth rates are calculated with the storage ring design code 'ZAP'. Single bunch instabilities should not be a problem for total circulating currents of 100mA (18 bunches, 5.6mA/bunch). Coupled-bunch growth rate calculations are based on a line broadening technique for the higher-order cavity modes. In the longitudinal case, feedback will be required. For the transverse coupled bunch instabilities, growth rates are about 5 times less. 14 refs., 5 figs

The deubiquitinase USP9X regulates FBW7 stability and suppresses colorectal cancer

Science.gov (United States)

Khan, Omar M.; Carvalho, Joana; Spencer-Dene, Bradley; Mitter, Richard; Frith, David; Snijders, Ambrosius P.; Wood, Stephen A.

2018-01-01

The tumor suppressor FBW7 targets oncoproteins such as c-MYC for ubiquitylation and is mutated in several human cancers. We noted that in a substantial percentage of colon cancers, FBW7 protein is undetectable despite the presence of FBW7 mRNA. To understand the molecular mechanism of FBW7 regulation in these cancers, we employed proteomics and identified the deubiquitinase (DUB) USP9X as an FBW7 interactor. USP9X antagonized FBW7 ubiquitylation, and Usp9x deletion caused Fbw7 destabilization. Mice lacking Usp9x in the gut showed reduced secretory cell differentiation and increased progenitor proliferation, phenocopying Fbw7 loss. In addition, Usp9x inactivation impaired intestinal regeneration and increased tumor burden in colitis-associated intestinal cancer. c-Myc heterozygosity abrogated increased progenitor proliferation and tumor burden in Usp9x-deficient mice, suggesting that Usp9x suppresses tumor formation by regulating Fbw7 protein stability and thereby reducing c-Myc. Thus, we identify a tumor suppressor mechanism in the mammalian intestine that arises from the posttranslational regulation of FBW7 by USP9X independent of somatic FBW7 mutations. PMID:29346117

A 9 x 9 Matrix Representation of Birman-Wenzl-Murakami Algebra and Berry Phase in Yang-Baxter System

International Nuclear Information System (INIS)

Gou Lidan; Xue Kang; Wang Gangcheng

2011-01-01

We present a 9 x 9 S-matrix and E-matrix. A representation of specialized Birman-Wenzl-Murakami algebra is obtained. Starting from the given braid group representation S-matrix, we obtain the trigonometric solution of Yang-Baxter equation. A unitary matrix R(x, φ 1 ,φ 2 ) is generated via the Yang-Baxterization approach. Then we construct a Yang-Baxter Hamiltonian through the unitary matrix R(x, φ 1 ,φ 2 ). Berry phase of this Yang-Baxter system is investigated in detail. (general)

Analysis of the 4d7 (4f + 6p) and 4p54d9 configurations of Sn VII, Sb VIII and Te IX

International Nuclear Information System (INIS)

Azarov, V.I.; Joshi, Y.N.; Churilov, S.S.; Ryabtsev, A.N.

1994-01-01

The spectra of tin, antimony and tellerium were photographed in the 120-200 A region on 10.7 m and 3 m grazing incidence spectrographs using a triggered spark source. The 4d 8 -4d 7 (4f + 6p) + 4p 5 4d 9 transitions of Sn VII, Sb VIII and Te IX were investigated. In the Sn VII spectrum 109 new lines were classified in the 152-192 A region and 34 new levels were established, in the Sb VIII spectrum 78 new lines were classified in the 138-158 A region and 21 new levels were established, and in the Te IX 76 new lines were classified in the 121-139 A region and 21 new levels were established. Strong configuration interaction among the 4d 7 (np + mf), and 4p 5 4d 9 (n = 5, 6; m = 4, 5) configurations was observed. Least-squares-fitting (LSF) parametric calculations involving configuration interaction were carried out to interpret the observed spectra. (orig.)

Operational Lessons Learned from the Ares I-X Flight Test

Science.gov (United States)

Davis, Stephan R.

2010-01-01

The Ares I-X flight test, launched in 2009, is the first test of the Ares I crew launch vehicle. This development flight test evaluated the flight dynamics, roll control, and separation events, but also provided early insights into logistical, stacking, launch, and recovery operations for Ares I. Operational lessons will be especially important for NASA as the agency makes the transition from the Space Shuttle to the Constellation Program, which is designed to be less labor-intensive. The mission team itself comprised only 700 individuals over the life of the project compared to the thousands involved in Shuttle and Apollo missions; while missions to and beyond low-Earth orbit obviously will require additional personnel, this lean approach will serve as a model for future Constellation missions. To prepare for Ares I-X, vehicle stacking and launch infrastructure had to be modified at Kennedy Space Center's Vehicle Assembly Building (VAB) as well as Launch Complex (LC) 39B. In the VAB, several platforms and other structures designed for the Shuttle s configuration had to be removed to accommodate the in-line, much taller Ares I-X. Vehicle preparation activities resulted in delays, but also in lessons learned for ground operations personnel, including hardware deliveries, cable routing, transferred work and custodial paperwork. Ares I-X also proved to be a resource challenge, as individuals and ground service equipment (GSE) supporting the mission also were required for Shuttle or Atlas V operations at LC 40/41 at Cape Canaveral Air Force Station. At LC 39B, several Shuttle-specific access arms were removed and others were added to accommodate the in-line Ares vehicle. Ground command, control, and communication (GC3) hardware was incorporated into the Mobile Launcher Platform (MLP). The lightning protection system at LC 39B was replaced by a trio of 600-foot-tall towers connected by a catenary wire to account for the much greater height of the vehicle. Like Shuttle

Solid State Structure of Poly(9,9-dinonylfluorene)

DEFF Research Database (Denmark)

Torkkeli, Mika; Galbrecht, Frank; Scherf, Ullrich

2015-01-01

We report on X-ray diffraction and grazing-incidence X-ray diffraction data of poly(9,9-dinonylfluorene) (PF9) in bulk, thin films and in the 1% methylcyclohexane gel. We denote the main crystalline phase as alpha phase and propose that the unit cell is monoclinic (a = 29.31 angstrom, b = 23.......1 angstrom, and c = 16.7 angstrom). Structural analogues to other 9,9-di-n-alkyl-substituted polyfluorenes are discussed in terms of unit cell parameters and backbone geometry....

Simultaneous Determination of Copper, Lead, and Cadmium Ions at a Mo6S9-xIx Nanowires Modified Glassy Carbon Electrode Using Differential Pulse Anodic Stripping Voltammetry

International Nuclear Information System (INIS)

Lin, Hong; Li, Meixian; Mihailovič, Dragan

2015-01-01

Highlights: • An electrochemical sensor based on Mo 6 S 9-x I x nanowires was constructed. • Mo 6 S 9-x I x nanowires can amplify electrochemical responses of heavy metal ions. • Mo 6 S 9-x I x nanowires can promote electron transfer. • Mo 6 S 9-x I x nanowires can accumulate metal ions due to large surface area. • The preparation of the sensor is simple, short-time and it does not require a special apparatus. -- ABSTRACT: A novel electrochemical sensor based on a new kind of nanomaterials Mo 6 S 9-x I x nanowires modified glassy carbon electrode (GCE) was constructed for simultaneous determination of cadmium(II), lead(II) and copper(II) using differential pulse anodic stripping voltammetry (DPASV). Various experimental parameters such as the modified amount, pH, deposition time and deposition potential were optimized. Under the optimal conditions, the stripping peak currents increase linearly with increasing concentrations of Cd(II), Pb(II) and Cu(II) ions in the ranges of 0.5∼150 μg · L −1 , 1.5∼450 μg · L −1 and 0.8~240 μg · μg·L −1 , 1.5∼450 μg·L −1 and 0.8∼240 μg·L −1 , respectively. And the limits of detection (S/N = 3) are estimated to be 0.10 μg · L −1 for Cd (II), 0.45 μg·L −1 for Pb(II) and 0.20 μg·L −1 for Cu(II), which are two orders of magnitude lower than those obtained at the unmodified electrodes. Most importantly, the sensor has been successfully applied to the determination of trace metal ions in the tap water samples. This developed electrochemical sensor exhibits high sensitivity, good stability and reproducibility

HST spectrum and timing of the ultracompact X-ray binary candidate 47 Tuc X9

Science.gov (United States)

Tudor, V.; Miller-Jones, J. C. A.; Knigge, C.; Maccarone, T. J.; Tauris, T. M.; Bahramian, A.; Chomiuk, L.; Heinke, C. O.; Sivakoff, G. R.; Strader, J.; Plotkin, R. M.; Soria, R.; Albrow, M. D.; Anderson, G. E.; van den Berg, M.; Bernardini, F.; Bogdanov, S.; Britt, C. T.; Russell, D. M.; Zurek, D. R.

2018-05-01

To confirm the nature of the donor star in the ultracompact X-ray binary candidate 47 Tuc X9, we obtained optical spectra (3000-10 000 Å) with the Hubble Space Telescope / Space Telescope Imaging Spectrograph. We find no strong emission or absorption features in the spectrum of X9. In particular, we place 3σ upper limits on the H α and He II λ4686 emission line equivalent widths - EWH α ≲ 14 Å and -EW_{He {II}} ≲ 9 Å, respectively. This is much lower than seen for typical X-ray binaries at a similar X-ray luminosity (which, for L_2-10 keV ≈ 10^{33}-10^{34} erg s-1 is typically - EWH α ˜ 50 Å). This supports our previous suggestion, by Bahramian et al., of an H-poor donor in X9. We perform timing analysis on archival far-ultraviolet, V- and I-band data to search for periodicities. In the optical bands, we recover the 7-d superorbital period initially discovered in X-rays, but we do not recover the orbital period. In the far-ultraviolet, we find evidence for a 27.2 min period (shorter than the 28.2 min period seen in X-rays). We find that either a neutron star or black hole could explain the observed properties of X9. We also perform binary evolution calculations, showing that the formation of an initial black hole/ He-star binary early in the life of a globular cluster could evolve into a present-day system such as X9 (should the compact object in this system indeed be a black hole) via mass-transfer driven by gravitational wave radiation.

X-RAY OUTFLOWS AND SUPER-EDDINGTON ACCRETION IN THE ULTRALUMINOUS X-RAY SOURCE HOLMBERG IX X-1

International Nuclear Information System (INIS)

Walton, D. J.; Harrison, F. A.; Miller, J. M.; Reis, R. C.; Fabian, A. C.; Roberts, T. P.; Middleton, M. J.

2013-01-01

Studies of X-ray continuum emission and flux variability have not conclusively revealed the nature of ultraluminous X-ray sources (ULXs) at the high-luminosity end of the distribution (those with L X ≥ 10 40 erg s –1 ). These are of particular interest because the luminosity requires either super-Eddington accretion onto a black hole of mass ∼10 M ☉ or more standard accretion onto an intermediate-mass black hole. Super-Eddington accretion models predict strong outflowing winds, making atomic absorption lines a key diagnostic of the nature of extreme ULXs. To search for such features, we have undertaken a long, 500 ks observing campaign on Holmberg IX X-1 with Suzaku. This is the most sensitive data set in the iron K bandpass for a bright, isolated ULX to date, yet we find no statistically significant atomic features in either emission or absorption; any undetected narrow features must have equivalent widths less than 15-20 eV at 99% confidence. These limits are far below the ∼>150 eV lines expected if observed trends between mass inflow and outflow rates extend into the super-Eddington regime and in fact rule out the line strengths observed from disk winds in a variety of sub-Eddington black holes. We therefore cannot be viewing the central regions of Holmberg IX X-1 through any substantial column of material, ruling out models of spherical super-Eddington accretion. If Holmberg IX X-1 is a super-Eddington source, any associated outflow must have an anisotropic geometry. Finally, the lack of iron emission suggests that the stellar companion cannot be launching a strong wind and that Holmberg IX X-1 must primarily accrete via Roche-lobe overflow

Star formation rate in Holmberg IX dwarf galaxy

Directory of Open Access Journals (Sweden)

Anđelić M.M.

2011-01-01

Full Text Available In this paper we use previously determined Hα fluxes for dwarf galaxy Holmberg IX (Arbutina et al. 2009 to calculate star formation rate (SFR in this galaxy. We discuss possible contaminations of Hα flux and, for the first time, we take into account optical emission from supernova remnants (SNRs as a possible source of contamination of Hα flux. Derived SFR for Holmberg IX is 3:4 x 10-4M.yr-1. Our value is lower then in previous studies, due to luminous shock-heated source M&H 9-10, possible hypernova remnant, which we excluded from the total Hα flux in our calculation of SFR.

The Type IX Secretion System (T9SS: Highlights and Recent Insights into Its Structure and Function

Directory of Open Access Journals (Sweden)

Anna M. Lasica

2017-05-01

Full Text Available Protein secretion systems are vital for prokaryotic life, as they enable bacteria to acquire nutrients, communicate with other species, defend against biological and chemical agents, and facilitate disease through the delivery of virulence factors. In this review, we will focus on the recently discovered type IX secretion system (T9SS, a complex translocon found only in some species of the Bacteroidetes phylum. T9SS plays two roles, depending on the lifestyle of the bacteria. It provides either a means of movement (called gliding motility for peace-loving environmental bacteria or a weapon for pathogens. The best-studied members of these two groups are Flavobacterium johnsoniae, a commensal microorganism often found in water and soil, and Porphyromonas gingivalis, a human oral pathogen that is a major causative agent of periodontitis. In P. gingivalis and some other periodontopathogens, T9SS translocates proteins, especially virulence factors, across the outer membrane (OM. Proteins destined for secretion bear a conserved C-terminal domain (CTD that directs the cargo to the OM translocon. At least 18 proteins are involved in this still enigmatic process, with some engaged in the post-translational modification of T9SS cargo proteins. Upon translocation across the OM, the CTD is removed by a protease with sortase-like activity and an anionic LPS is attached to the newly formed C-terminus. As a result, a cargo protein could be secreted into the extracellular milieu or covalently attached to the bacterial surface. T9SS is regulated by a two-component system; however, the precise environmental signal that triggers it has not been identified. Exploring unknown systems contributing to bacterial virulence is exciting, as it may eventually lead to new therapeutic strategies. During the past decade, the major components of T9SS were identified, as well as hints suggesting the possible mechanism of action. In addition, the list of characterized cargo

The Type IX Secretion System (T9SS): Highlights and Recent Insights into Its Structure and Function

Science.gov (United States)

Lasica, Anna M.; Ksiazek, Miroslaw; Madej, Mariusz; Potempa, Jan

2017-01-01

Protein secretion systems are vital for prokaryotic life, as they enable bacteria to acquire nutrients, communicate with other species, defend against biological and chemical agents, and facilitate disease through the delivery of virulence factors. In this review, we will focus on the recently discovered type IX secretion system (T9SS), a complex translocon found only in some species of the Bacteroidetes phylum. T9SS plays two roles, depending on the lifestyle of the bacteria. It provides either a means of movement (called gliding motility) for peace-loving environmental bacteria or a weapon for pathogens. The best-studied members of these two groups are Flavobacterium johnsoniae, a commensal microorganism often found in water and soil, and Porphyromonas gingivalis, a human oral pathogen that is a major causative agent of periodontitis. In P. gingivalis and some other periodontopathogens, T9SS translocates proteins, especially virulence factors, across the outer membrane (OM). Proteins destined for secretion bear a conserved C-terminal domain (CTD) that directs the cargo to the OM translocon. At least 18 proteins are involved in this still enigmatic process, with some engaged in the post-translational modification of T9SS cargo proteins. Upon translocation across the OM, the CTD is removed by a protease with sortase-like activity and an anionic LPS is attached to the newly formed C-terminus. As a result, a cargo protein could be secreted into the extracellular milieu or covalently attached to the bacterial surface. T9SS is regulated by a two-component system; however, the precise environmental signal that triggers it has not been identified. Exploring unknown systems contributing to bacterial virulence is exciting, as it may eventually lead to new therapeutic strategies. During the past decade, the major components of T9SS were identified, as well as hints suggesting the possible mechanism of action. In addition, the list of characterized cargo proteins is

Combustion Dynamic Characteristics Identification in a 9-point LDI Combustor Under Choked Outlet Boundary Conditions

Science.gov (United States)

He, Zhuohui J.; Chang, Clarence T.

2017-01-01

Combustion dynamics data were collected at the NASA Glenn Research Center's CE-5 flame tube test facility under combustor outlet choked conditions. Two 9-point Swirl-Venturi Lean Direct Injection (SV-LDI) configurations were tested in a rectangular cuboid combustor geometry. Combustion dynamic data were measured at different engine operational conditions up to inlet air pressure and temperature of 24.13 bar and 828 K, respectively. In this study, the effects of acoustic cavity resonance, precessing vortex core (PVC), and non-uniform thermal expansion on the dynamic noise spectrum are identified by comparing the dynamic data that collected at various combustor inlet conditions along with combustor geometric calculations. The results show that the acoustic cavity resonance noises were seen in the counter-rotating pilot configuration but not in the co-rotating pilot configuration. Dynamic pressure noise band at around 0.9 kHz was only detected at the P'41 location (9.8 cm after fuel injector face) but not at the P'42 location (29 cm after the fuel injector face); the amplitude of this noise band depended on the thermal expansion ratio (T4/T3). The noise band at around 1.8 kHz was found to depend on the inlet air pressure or the air density inside the combustor. The PVC frequency was not observed in these two configurations.

The Ultracompact Nature of the Black Hole Candidate X-Ray Binary 47 Tuc X9

Science.gov (United States)

Bahramian, Arash; Heinke, Craig O.; Tudor, Vlad; Miller-Jones, James C. A.; Bogdanov, Slavko; Maccarone, Thomas J.; Knigge, Christian; Sivakoff, Gregory R.; Chomiuk, Laura; Strader, J.;

SCCmec Type IX Element in Methicillin Resistant Staphylococcusaureusspa Type t337 (CC9) Isolated from Pigs and Pork in Thailand

DEFF Research Database (Denmark)

Vestergaard, Martin; Cavaco, Lina M; Sirichote, Pantip

2012-01-01

blaZ, aac-aphD, vga(A), tetM, and a tet efflux marker, in all strains and additionally ermB and aadD, cat and fex(A) in the pork isolates. None of the isolates were found PVL-positive, but enterotoxins were identified in all isolates. To our knowledge, only a few descriptions of MRSA in livestock...... and food products in Thailand have been observed but this is the first observation of MRSA CC9 associated with SCCmec IX in pork. This study indicates a likely widespread distribution of MRSA in pig and pork in Thailand and further investigation on the prevalence and importance of livestock associated MRSA...

The role of passive and inherent safety properties in Siemens/KWU nuclear power plants

International Nuclear Information System (INIS)

Gremm, O.

1990-01-01

In Siemens/KWU Nuclear Power Plants the applied safety concept consist of a well balanced combination of active, passive use well is inherent safety measures. In principle it is not possible to realise a safety concept exclusively with inherent and/or passive safety properties. The respective measures and arguments will be explained in detail in the presentation. In addition the Siemens/KWU safety concept with examples of the role of inherent and passive safety measures will be illustrated. (author). 9 refs, 9 figs

Deubiquitylating enzyme USP9x regulates hippo pathway activity by controlling angiomotin protein turnover

DEFF Research Database (Denmark)

Nguyen, Thanh Hung; Andrejeva, Diana; Gupta, Rajat

2016-01-01

/TAZ activity. We demonstrate that USPx regulates ubiquitin-mediated turnover of the YAP inhibitor, Angiomotin. USP9x acts to deubiquitylate Angiomotin at lysine 496, resulting in stabilization of Angiomotin and lower YAP/TAZ activity. USP9x mRNA levels were reduced in several cancers. Clinically, USP9x m......RNA levels were reduced in several cancers with low USPx expression correlating with poor prognosis in renal clear cell carcinoma. Our data indicate that USP9x may be a useful biomarker for renal clear cell carcinoma....

Long-term strength and allowable stresses of grade 10Kh9MFB and X10CrMoVNb9-1 (T91/P91) chromium heat-resistant steels

Science.gov (United States)

Skorobogatykh, V. N.; Danyushevskiy, I. A.; Schenkova, I. A.; Prudnikov, D. A.

2015-04-01

Currently, grade X10CrMoVNb9-1 (T91, P91) and 10Kh9MFB (10Kh9MFB-Sh) chromium steels are widely applied in equipment manufacturing for thermal power plants in Russia and abroad. Compilation and comparison of tensile, impact, and long-term strength tests results accumulated for many years of investigations of foreign grade X10CrMoVNb9-1, T91, P91, and domestic grade 10Kh9MFB (10Kh9MFB-Sh) steels is carried out. The property identity of metals investigated is established. High strength and plastic properties of steels, from which pipes and other products are made, for operation under creep conditions are confirmed. Design characteristics of long-term strength on the basis of tests with more than one million of hour-samples are determined ( and at temperatures of 500-650°C). The table of recommended allowable stresses for grade 10Kh9MFB, 10Kh9MFB-SH, X10CrMoVNb9-1, T91, and P91 steels is developed. The long-time properties of pipe welded joints of grade 10Kh9MFB+10Kh9MFB, 10Kh9MFB-Sh+10Kh9MFB-Sh, X10CrMoVNb9-1+X10CrMoVNb9-1, P91+P91, T91+T91, 10Kh9MFB (10Kh9MFB-Sh)+X10CrMoVNb9-1(T/P91) steels is researched. The welded joint reduction factor is experimentally determined.

Broadband X-ray spectra of the ultraluminous X-ray source Holmberg IX X-1 observed with NuSTAR, XMM-Newton, and Suzaku

Energy Technology Data Exchange (ETDEWEB)

Walton, D. J.; Harrison, F. A.; Grefenstette, B. W.; Fuerst, F.; Madsen, K. K.; Rana, V.; Stern, D. [Space Radiation Laboratory, California Institute of Technology, Pasadena, CA 91125 (United States); Miller, J. M. [Department of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI 48109-1042 (United States); Bachetti, M.; Barret, D.; Webb, N. [Universite de Toulouse, UPS-OMP, IRAP, Toulouse (France); Boggs, S. E.; Craig, W. W. [Space Sciences Laboratory, University of California, Berkeley, CA 94720 (United States); Christensen, F. E. [DTU Space, National Space Institute, Technical University of Denmark, Elektrovej 327, DK-2800 Lyngby (Denmark); Fabian, A. C.; Parker, M. L. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA (United Kingdom); Hailey, C. J. [Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027 (United States); Ptak, A.; Zhang, W. W., E-mail: dwalton@srl.caltech.edu [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

2014-09-20

We present results from the coordinated broadband X-ray observations of the extreme ultraluminous X-ray source Holmberg IX X-1 performed by NuSTAR, XMM-Newton, and Suzaku in late 2012. These observations provide the first high-quality spectra of Holmberg IX X-1 above 10 keV to date, extending the X-ray coverage of this remarkable source up to ∼30 keV. Broadband observations were undertaken at two epochs, between which Holmberg IX X-1 exhibited both flux and strong spectral variability, increasing in luminosity from L {sub X} = (1.90 ± 0.03) × 10{sup 40} erg s{sup –1} to L {sub X} = (3.35 ± 0.03) × 10{sup 40} erg s{sup –1}. Neither epoch exhibits a spectrum consistent with emission from the standard low/hard accretion state seen in Galactic black hole binaries, which would have been expected if Holmberg IX X-1 harbors a truly massive black hole accreting at substantially sub-Eddington accretion rates. The NuSTAR data confirm that the curvature observed previously in the 3-10 keV bandpass does represent a true spectral cutoff. During each epoch, the spectrum appears to be dominated by two optically thick thermal components, likely associated with an accretion disk. The spectrum also shows some evidence for a nonthermal tail at the highest energies, which may further support this scenario. The available data allow for either of the two thermal components to dominate the spectral evolution, although both scenarios require highly nonstandard behavior for thermal accretion disk emission.

Ares I-X Ground Diagnostic Prototype

Science.gov (United States)

Schwabacher, Mark A.; Martin, Rodney Alexander; Waterman, Robert D.; Oostdyk, Rebecca Lynn; Ossenfort, John P.; Matthews, Bryan

2010-01-01

The automation of pre-launch diagnostics for launch vehicles offers three potential benefits: improving safety, reducing cost, and reducing launch delays. The Ares I-X Ground Diagnostic Prototype demonstrated anomaly detection, fault detection, fault isolation, and diagnostics for the Ares I-X first-stage Thrust Vector Control and for the associated ground hydraulics while the vehicle was in the Vehicle Assembly Building at Kennedy Space Center (KSC) and while it was on the launch pad. The prototype combines three existing tools. The first tool, TEAMS (Testability Engineering and Maintenance System), is a model-based tool from Qualtech Systems Inc. for fault isolation and diagnostics. The second tool, SHINE (Spacecraft Health Inference Engine), is a rule-based expert system that was developed at the NASA Jet Propulsion Laboratory. We developed SHINE rules for fault detection and mode identification, and used the outputs of SHINE as inputs to TEAMS. The third tool, IMS (Inductive Monitoring System), is an anomaly detection tool that was developed at NASA Ames Research Center. The three tools were integrated and deployed to KSC, where they were interfaced with live data. This paper describes how the prototype performed during the period of time before the launch, including accuracy and computer resource usage. The paper concludes with some of the lessons that we learned from the experience of developing and deploying the prototype.

Greta Kaits 9. apr. 1928 - 29. aug. 1946 : [luuletused] / Mats Traat

Index Scriptorium Estoniae

Traat, Mats, 1936-

2008-01-01

Sisu : Greta Kaits 9. apr. 1928 - 29. aug. 1946 ; Villem Hänilane 1898 - 1952 ; Peeter Pedak 1897 - 1953 ; Max Äidse 1903 - 1959 ; Lavinia Laidam ; Buchard Pruus ; Sergei Krivokopõtov ; Allan Luht 5. VII 1962 - 17. V 2007 ; Karl Saarmets 9. III 1924 - 14. IX 1981 ; Raimo Ritsik

Quantitative Interpretation of X-ray Absorption Near Structure Continuation Progress Report for 1st year 9/15/98-9/14/99

International Nuclear Information System (INIS)

Rehr, John J.; Bare, Simon; Stocht, Joachim

1999-01-01

OAK-B135 Quantitative Interpretation of X-ray Absorption Near Structure Continuation Progress Report for 1st year 9/15/98-9/14/99. This paper proposes to develop two industrial research collaborations to further develop the FEFF8 x-ray spectroscopy code to achieve a quantitative interpretation of x-ray absorption near edge structure (XANES) in materials of interest in energy research: (a) Quantitative interpretation of XANES for heterogeneous catalysts and disordered materials; and (b) quantitative interpretation of white-lines in XANES. The paper also outlines significant results achieved during the first Grant year

Synthesis, characterization, temperature dependent electrical and magnetic properties of Ca{sub 3}Co{sub 4}O{sub 9} by a starch assisted sol–gel combustion method

Energy Technology Data Exchange (ETDEWEB)

Agilandeswari, K.; Ruban Kumar, A., E-mail: arubankumar@vit.ac.in

2014-09-01

In this present work we discussed the synthesis of pure Ca{sub 3}Co{sub 4}O{sub 9} ceramic powder by a starch assisted sol–gel combustion method. The products were characterized by powder X-ray diffraction (XRD), thermogravimetric and differential thermal analyses (TGA–DTA), Fourier transformation infrared spectroscopy (FTIR), scanning electron microscope (SEM) and UV–visible diffuse reflectance spectroscopy (DRS). X-ray diffraction pattern confirmed the formation of single phase Ca{sub 3}Co{sub 4}O{sub 9} at a sintering temperature of 1073 K, and it is also confirmed in the thermal analysis. SEM images indicate the presence of diffused microporous sphere like morphology and the grain sizes are in the range of 150–300 nm. Optical properties of Ca{sub 3}Co{sub 4}O{sub 9} ceramic show a band gap at an energy level of 2.10 eV. A maximum electrical resistivity of 0.002 mΩ cm was exhibited by Ca{sub 3}Co{sub 4}O{sub 9} that was decreased to 0.0012 mΩ cm, when the temperature increased from 300 K to 473 K. Dielectric studies were conducted at various temperatures from room temperature to 673 K and the results indicate that the space charge polarization contributes to the conduction mechanism. It also shows that the dielectric relaxation with activation energy is 0.96 eV. The magnetic properties as a function of temperature represent the ferri-paramagnetic phase transition at above 50 K. M–H curve shows the hysteresis loop with saturation magnetization (M{sub s}) and confirms the presence of soft magnetic materials. - Highlights: • Ca{sub 3}Co{sub 4}O{sub 9} has not yet been reported by this starch assisted sol–gel combustion method. • SEM image shows microporous sphere like morphology. • The optical and dielectric properties of Ca{sub 3}Co{sub 4}O{sub 9} sample were studied. • Temperature dependent magnetic property has been studied for Ca{sub 3}Co{sub 4}O{sub 9}. It behaves as a soft magnetic material at 5 K.

Hexagonal perovskites with cationic vacancies. 24. Rhombohedral 9 L stacking polytypes in the systems Ba/sub 3/Wsub(2-x)sup(VI)Msub(x)sup(V)vacantOsub(9-x/2)vacantsub(x/2) with Msup(V) = Nb, Ta

Energy Technology Data Exchange (ETDEWEB)

Kemmler-Sack, S [Tuebingen Univ. (Germany, F.R.). Lehrstuhl fuer Anorganische Chemie 2

1980-12-01

In the system Ba/sub 3/Wsub(2-x)sup(VI)Nbsub(x)sup(V)vacantOsub(9-x/2)vacantsub(x/2) stacking polytypes of rhombohedral 9 L type (sequence (hhc)/sub 3/; space group R-3m) can be prepared with approximately 1/3 <= x <= 2. For x = 2(Ba/sub 3/Nb/sub 2/vacantO/sub 8/vacant) two modifications are formed. In the corresponding Ta system the phase width is reduced to a smaller region with x approximately 1/3.

High-pressure syntheses of lanthanide polysulfides and polyselenides LnX_1_._9 (Ln = Gd-Tm, X = S, Se)

International Nuclear Information System (INIS)

Mueller, Carola J.; Schwarz, Ulrich; Doert, Thomas

2012-01-01

The polysulfides LnS_1_._9 and polyselenides LnSe_1_._9 of the lanthanide metals from gadolinium to thulium were prepared by high-pressure high-temperature synthesis. The compounds adopt the tetragonal CeSe_1_._9 structure type in space group P4_2/n (No. 86) with lattice parameters of 8.531 Aa ≤ a ≤ 8.654 Aa and 15.563 Aa ≤ c ≤ 15.763 Aa for the sulfides and 8.869 Aa ≤ a ≤ 9.076 Aa and 16.367 Aa ≤ c ≤ 16.611 Aa for the selenides. The atomic pattern consists of puckered double slabs [LnX]"+ and planar chalcogenide layers with ten possible chalcogen positions, of which eight are occupied by chalcogen atoms forming dinuclear X_2"2"- dianions, one by a single X"2"- ion and one remaining vacant. This resembles a √5 x √5 x 2 superstructure of the ZrSSi aristotype. Structural relationships to the aristotype and the related lanthanide polychalcogenides LnX_2_-_δ (Ln = La-Tm, X = S-Te, δ = 0 - 0.3) are discussed. The samples synthesized under high-pressure conditions (p > 1 GPa) decompose slowly under release of sulfur or selenium at ambient conditions. The crystal structure of a partially degraded thulium-polysulfide sample can be described as an incommensurate variant of the original TmS_1_._9 motif. Additionally, the isostructural ternary compound Gd(S_1_-_xSe_x)_1_._9 was synthesized and characterized by powder X-ray diffraction. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

SCCmec type IX element in Methicillin resistant Staphylococcus aureus spa-type t337 (CC9 isolated from pigs and pork in Thailand

Directory of Open Access Journals (Sweden)

Martin eVestergaard

2012-03-01

Full Text Available Methicillin resistant Staphylococcus aureus (MRSA have emerged among livestock in several countries. In this study, we describe the results of a screening performed in pigs and raw pork samples in Thailand. Ten pork samples and 15 nasal swabs from pigs were collected from two markets and one pig farm in the Samuth Songkhram province in Thailand. MRSA were isolated using selective isolation procedures and confirmed by mecA PCR. The MRSA were characterized by antimicrobial susceptibility testing, PFGE, spa typing, SCCmec typing, and MLST. Resistance and virulence markers were screened using a microarray. Five of the pork samples and six pig nasal swabs were positive for MRSA. All 11 isolates belonged to spa type t337 and CC9 but showed diversity in antimicrobial resistance patterns and PFGE profiles. All isolates harbored SCCmec IX and were resistant to seven out of 14 tested antimicrobials; additional resistances were found in the pork isolates. Microarray analysis identified blaZ, aac-aphD, vga(A, tetM, and a tet efflux marker, in all strains and additionally ermB and aadD, cat and fex(A in the pork isolates. None of the isolates were found PVL-positive, but enterotoxins were identified in all isolates. This is, to our knowledge, the first description of MRSA in livestock and food products in Thailand and also the first observation of MRSA CC9 associated with SCCmec IX. This study indicates a likely widespread distribution of MRSA in pig and pork in Thailand and further investigation on the prevalence and importance of livestock associated MRSA in Thailand is needed.

Tissue factor-dependent activation of tritium-labeled factor IX and factor X in human plasma

International Nuclear Information System (INIS)

Morrison, S.A.; Jesty, J.

1984-01-01

A comparism was made of the tissue factor-dependent activation of tritium-labeled factor IX and factor X in a human plasma system and a study was made of the role of proteases known to stimulate factor VII activity. Plasma was defibrinated by heating and depleted of its factors IX and X by passing it through antibody columns. Addition of human brain thromboplastin, Ca2+, and purified 3H-labeled factor X to the plasma resulted, after a short lag, in burst-like activation of the factor X, measured as the release of radiolabeled activation peptide. The progress of activation was slowed by both heparin and a specific inhibitor of factor Xa but factor X activation could not be completely abolished by such inhibitors. In the case of 3H-factor IX activation, the rate also increased for approximately 3 min after addition of thromboplastin, but was not subsequently curtailed. A survey of proteases implicated as activators of factor VII in other settings showed that both factor Xa and factor IXa could accelerate the activation of factor IX. However, factor Xa was unique in obliterating activation when present at concentrations greater than approximately 1 nM. Heparin inhibited the tissue factor-dependent activation of factor IX almost completely, apparently through the effect of antithrombin on the feedback reactions of factors Xa and IXa on factor VII. These results suggest that a very tight, biphasic control of factor VII activity exists in human plasma, which is modulated mainly by factor Xa. At saturation of factor VIIa/tissue factor, factor IX activation was significantly more rapid than was previously found in bovine plasma under similar conditions. The activation of factor X at saturation was slightly more rapid than in bovine plasma, despite the presence of heparin

SIEMENS

International Nuclear Information System (INIS)

2001-01-01

This CD is multimedia presentation of programme safety upgrading of Bohunice V1 NPP. This chapter contains information about Siemens and it participation on reconstruction of Bohunice V1 and V1 NPPs. It consists of next parts: (1) FRAMATOME ANP - worldwide activities of the FRAMATOME are presented; (2) Nuclear power engineering - present activities focus on: Upgrading and Backfitting (Siemens WWER activities since 1971); Electrical instrumentation and control systems; Fuel assemblies and related services; Reactor development and construction of new plants; (3) Safety improvement; (4) Siemens in Slovakia (activities of Siemens in Slovakia during 1993-2000 are presented); (5) More than 150-year history

77 FR 64401 - Order of Succession for HUD Region IX

Science.gov (United States)

2012-10-19

... DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT [FR-5550-D-12] Order of Succession for HUD Region IX... Field Offices (Region IX). This Order of Succession supersedes all previous Orders of Succession for HUD Region IX. DATES: Effective Date: October 9, 2012. FOR FURTHER INFORMATION CONTACT: Lawrence D. Reynolds...

Ares I-X Flight Test Philosophy

Science.gov (United States)

Davis, S. R.; Tuma, M. L.; Heitzman, K.

2007-01-01

In response to the Vision for Space Exploration, the National Aeronautics and Space Administration (NASA) has defined a new space exploration architecture to return humans to the Moon and prepare for human exploration of Mars. One of the first new developments will be the Ares I Crew Launch Vehicle (CLV), which will carry the Orion Crew Exploration Vehicle (CEV), into Low Earth Orbit (LEO) to support International Space Station (ISS) missions and, later, support lunar missions. As part of Ares I development, NASA will perform a series of Ares I flight tests. The tests will provide data that will inform the engineering and design process and verify the flight hardware and software. The data gained from the flight tests will be used to certify the new Ares/Orion vehicle for human space flight. The primary objectives of this first flight test (Ares I-X) are the following: Demonstrate control of a dynamically similar integrated Ares CLV/Orion CEV using Ares CLV ascent control algorithms; Perform an in-flight separation/staging event between an Ares I-similar First Stage and a representative Upper Stage; Demonstrate assembly and recovery of a new Ares CLV-like First Stage element at Kennedy Space Center (KSC); Demonstrate First Stage separation sequencing, and quantify First Stage atmospheric entry dynamics and parachute performance; and Characterize the magnitude of the integrated vehicle roll torque throughout the First Stage (powered) flight. This paper will provide an overview of the Ares I-X flight test process and details of the individual flight tests.

The PorX response regulator of the Porphyromonas gingivalis PorXY two-component system does not directly regulate the Type IX secretion genes but binds the PorL subunit.

Directory of Open Access Journals (Sweden)

Maxence S Vincent

2016-08-01

Full Text Available The Type IX secretion system (T9SS is a versatile multi-protein complex restricted to bacteria of the Bacteriodetes phylum and responsible for the secretion of surface attachment of diverse proteins that participate to S-layer formation, gliding motility or pathogenesis. The T9SS is poorly characterized but a number of proteins involved in the assembly of the secretion apparatus in the oral pathogen Porphyromonas gingivalis have been identified based on genome substractive analyses. Among these proteins, PorY and PorX encode typical two-component system (TCS sensor and CheY-like response regulator respectively. Although the porX and porY genes do not localize at the same genetic locus, it has been proposed that PorXY form a bona fide TCS. Deletion of the porX in P. gingivalis causes a slight decrease of the expression of a number of other T9SS genes, including sov, porT, porP, porK, porL, porM, porN and porY. Here, we show that PorX and the soluble cytoplasmic domain of PorY interact. Using electrophoretic mobility shift, DNA-protein co-purification and heterologous host expression assays, we showed that PorX does not bind and does not directly regulate expression of the T9SS genes. Finally, we show that PorX interacts with the cytoplasmic domain of PorL, a component of the T9SS membrane core complex and propose that the CheY-like PorX protein might be involved in the dynamics of the T9SS.

Characterization of SrCo1.5Ti1.5Fe9O19 hexagonal ferrite synthesized by sol-gel combustion and solid state route

International Nuclear Information System (INIS)

Vinaykumar, R.; Mazumder, R.; Bera, J.

2017-01-01

Co-Ti co-substituted SrM hexagonal ferrite (SrCo 1.5 Ti 1.5 Fe 9 O 19 ) was synthesized by sol-gel combustion and solid state route. The effects of sources of TiO 2 raw materials; titanium tetra-isopropoxide (TTIP) and titanyl nitrate (TN) on the phase formation behavior and properties of the ferrite were studied. The thermal decomposition behavior of the gel was studied using TG-DSC. The phase formation behavior of the ferrite was studied by using X-ray powder diffraction and FTIR analysis. Phase formation was comparatively easier in the TN-based sol-gel process. The morphology of powder and sintered ferrite was investigated using scanning electron microscope. Magnetic properties like magnetization, coercivity, permeability, tan δ µ and dielectric properties were investigated. The ferrite synthesized by sol-gel based chemical route showed higher saturation magnetization, permeability and permittivity compared to the ferrite synthesized by solid state route. - Highlights: • SrCo 1.5 Ti 1.5 Fe 9 O 19 ferrite was successfully prepared by sol–gel combustion process. • Sol-gel synthesis of the ferrite using titanyl nitrate has been reported first time. • Phase formation was easier in the titanyl nitrate based sol-gel process. • Better magneto-dielectric properties were observed in sol-gel processed ferrite.

Comparative proteomic analysis of normal and collagen IX null mouse cartilage reveals altered extracellular matrix composition and novel components of the collagen IX interactome.

Science.gov (United States)

Brachvogel, Bent; Zaucke, Frank; Dave, Keyur; Norris, Emma L; Stermann, Jacek; Dayakli, Münire; Koch, Manuel; Gorman, Jeffrey J; Bateman, John F; Wilson, Richard

2013-05-10

Collagen IX is an integral cartilage extracellular matrix component important in skeletal development and joint function. Proteomic analysis and validation studies revealed novel alterations in collagen IX null cartilage. Matrilin-4, collagen XII, thrombospondin-4, fibronectin, βig-h3, and epiphycan are components of the in vivo collagen IX interactome. We applied a proteomics approach to advance our understanding of collagen IX ablation in cartilage. The cartilage extracellular matrix is essential for endochondral bone development and joint function. In addition to the major aggrecan/collagen II framework, the interacting complex of collagen IX, matrilin-3, and cartilage oligomeric matrix protein (COMP) is essential for cartilage matrix stability, as mutations in Col9a1, Col9a2, Col9a3, Comp, and Matn3 genes cause multiple epiphyseal dysplasia, in which patients develop early onset osteoarthritis. In mice, collagen IX ablation results in severely disturbed growth plate organization, hypocellular regions, and abnormal chondrocyte shape. This abnormal differentiation is likely to involve altered cell-matrix interactions but the mechanism is not known. To investigate the molecular basis of the collagen IX null phenotype we analyzed global differences in protein abundance between wild-type and knock-out femoral head cartilage by capillary HPLC tandem mass spectrometry. We identified 297 proteins in 3-day cartilage and 397 proteins in 21-day cartilage. Components that were differentially abundant between wild-type and collagen IX-deficient cartilage included 15 extracellular matrix proteins. Collagen IX ablation was associated with dramatically reduced COMP and matrilin-3, consistent with known interactions. Matrilin-1, matrilin-4, epiphycan, and thrombospondin-4 levels were reduced in collagen IX null cartilage, providing the first in vivo evidence for these proteins belonging to the collagen IX interactome. Thrombospondin-4 expression was reduced at the mRNA level

The PorX Response Regulator of the Porphyromonas gingivalis PorXY Two-Component System Does Not Directly Regulate the Type IX Secretion Genes but Binds the PorL Subunit

Science.gov (United States)

Vincent, Maxence S.; Durand, Eric; Cascales, Eric

2016-01-01

The Type IX secretion system (T9SS) is a versatile multi-protein complex restricted to bacteria of the Bacteriodetes phylum and responsible for the secretion or cell surface exposition of diverse proteins that participate to S-layer formation, gliding motility or pathogenesis. The T9SS is poorly characterized but a number of proteins involved in the assembly of the secretion apparatus in the oral pathogen Porphyromonas gingivalis have been identified based on genome substractive analyses. Among these proteins, PorY, and PorX encode typical two-component system (TCS) sensor and CheY-like response regulator respectively. Although the porX and porY genes do not localize at the same genetic locus, it has been proposed that PorXY form a bona fide TCS. Deletion of porX in P. gingivalis causes a slight decrease of the expression of a number of other T9SS genes, including sov, porT, porP, porK, porL, porM, porN, and porY. Here, we show that PorX and the soluble cytoplasmic domain of PorY interact. Using electrophoretic mobility shift, DNA-protein co-purification and heterologous host expression assays, we demonstrate that PorX does not bind T9SS gene promoters and does not directly regulate expression of the T9SS genes. Finally, we show that PorX interacts with the cytoplasmic domain of PorL, a component of the T9SS membrane core complex and propose that the CheY-like PorX protein might be involved in the dynamics of the T9SS. PMID:27630829

The Evaluation of Solid Wastes Reduction with Combustion System in the Combustion Chamber

International Nuclear Information System (INIS)

Prayitno; Sukosrono

2007-01-01

The evaluation of solid wastes reduction with combustion system is used for weight reduction factor. The evaluation was done design system of combustion chamber furnace and the experiment was done by burning a certain weight of paper, cloth, plastic and rubber in the combustion chamber. The evaluation of paper wastes, the ratio of wastes (paper, cloth, plastic and rubber) against the factor of weight reduction (%) were investigated. The condition was dimension of combustion chamber furnace = 0.6 X 0.9 X 1.20 X 1 m with combustion chamber and gas chamber and reached at the wastes = 2.500 gram, oxygen pressure 0.5 Bar, wastes ratio : paper : cloth : plastic : rubber = 55 : 10 : 30 : 5, the reduction factor = 6.36 %. (author)

Crystallization and preliminary X-ray analysis of coagulation factor IX-binding protein from habu snake venom at pH 6.5 and 4.6

International Nuclear Information System (INIS)

Suzuki, Nobuhiro; Shikamoto, Yasuo; Fujimoto, Zui; Morita, Takashi; Mizuno, Hiroshi

2004-01-01

Crystals of habu coagulation factor IX-binding protein have been obtained at pH 6.5 and 4.6 and characterized by X-ray diffraction. Coagulation factor IX-binding protein isolated from Trimeresurus flavoviridis (IX-bp) is a C-type lectin-like protein. It is an anticoagulant protein consisting of homologous subunits A and B. The subunits both contain a Ca 2+ -binding site with differing affinity (K d values of 14 and 130 µM at pH 7.5). These binding characteristics are pH-dependent; under acidic conditions, the affinity of the low-affinity site was reduced considerably. In order to identify which site has high affinity and also to investigate the Ca 2+ -releasing mechanism, IX-bp was crystallized at pH 6.5 and 4.6. The crystals at pH 6.5 and 4.6 diffracted to 1.72 and 2.29 Å resolution, respectively; the former crystals belong to the monoclinic space group P2 1 , with unit-cell parameters a = 60.7, b = 63.5, c = 66.9 Å, β = 117.0°, while the latter belong to the monoclinic space group C2, with a = 134.1, b = 37.8, c = 55.8 Å, β = 110.4°

Morphological and structural characterization of the Zn0,9Mn0,1O powder synthesized by combustion reaction and Pechini

International Nuclear Information System (INIS)

Ribeiro, M.A.; Torquato, R.; Simoes, A.N.; Costa, A.C.F.M.; Gama, L.; Kiminami, R.H.G.A.

2009-01-01

Zinc oxide, due to the piezoelectric and electro-optical characteristics, is used in application such as, chemical sensor, varistor, transparent conductive thin film and DMS. The aim of this work is to evaluate and compare structural and morphological characteristics of nanometric powders of Zn 0,9 Mn 0,1 O prepared by chemical synthesis of combustion reaction and Pechini method. The powders were characterized by XRD, SEM and BET. The XRD data shown to both studied method the presence of ZnO phase with hexagonal structure and without second phase. The powder prepared by combustion reaction presented 9% of reduction in crystallinity and 42% of increase in surface area in comparison with the powder prepared by Pechini method. The morphological analysis of the powder showed that both method produce powders with soft agglomerates constituted by nano size particles. (author)

The Siemens vision

CSIR Research Space (South Africa)

Van Dijk, B

2017-10-01

Full Text Available engagement Siemens Centre of Knowledge Interchange (CKI) • Partnership and collaboration with Universities • Industry specific • Multi-million investment, annually Siemens mentors • All Siemens employees actively encouraged to engage with schools.... Siemens is an engineering company. Vision 2020 “we make what matters” including the next generation of engineers make a difference, change the world. > €20M annual donations to education. Siemens ownership culture 348,000 employees...

A combined experimental and computational thermodynamic study of fluorene-9-methanol and fluorene-9-carboxylic acid

International Nuclear Information System (INIS)

Oliveira, Juliana A.S.A.; Calvinho, Maria M.; Notario, R.; Monte, Manuel J.S.; Ribeiro da Silva, Maria D.M.C.

2013-01-01

Highlights: • A thermodynamic study of two fluorene derivatives is presented. • Vapour pressures and energies of combustion were measured. • Enthalpy, entropy and Gibbs energy of sublimation were derived. • Enthalpy and Gibbs energy of formation in crystal and gas phases were calculated. • Gas phase enthalpy of formation was also estimated by quantum chemical calculations. -- Abstract: This work reports an experimental and computational thermodynamic study performed on two 9-fluorene derivatives: fluorene-9-methanol and fluorene-9-carboxylic acid. The standard (p o = 0.1 MPa) molar enthalpies of formation in the crystalline phase of these compounds were derived from the standard molar energies of combustion, in oxygen, at T = 298.15 K, measured by static bomb combustion calorimetry. A static method, based on a capacitance diaphragm gauge, and a Knudsen effusion method were used to perform the vapour pressure study of the referred compounds, yielding accurate determination of the standard molar enthalpies and entropies of sublimation and vaporisation. For fluorene-9-carboxylic acid, the enthalpy of sublimation was also determined using Calvet microcalorimetry. The enthalpy of fusion of both compounds was derived indirectly from vapour pressure results and directly from DSC experiments. Combining the thermodynamic parameters of the compounds studied, the standard Gibbs energy of formation in crystalline and gaseous phases were derived as well as the standard molar enthalpy of formation in the gaseous phase. A theoretical study at the G3 and G4 levels has been carried out, and the calculated enthalpies of formation have been compared with the experimental values

Strategy: Siemens sees green - Siemens after the atom

International Nuclear Information System (INIS)

Moragues, M.; Dupin, L.; Scherer, M.

2011-01-01

This article discusses the new strategy implemented by Peter Loescher, the Siemens' CEO, who has just announced that Siemens decided to stop working directly for the nuclear sector, and to be a pioneer in sustainable development. This means a reorganisation of this group which, beside its energy department, its industry department and health department, comprises an infrastructures and cities' department which gathers rail, electricity distribution, building technologies. It also means important investments in the renewable energy sector, and phasing out of the automotive, telecommunications and data processing hardware sectors. The challenges, opportunities, strengths and weaknesses of Siemens four pillars (energy, industry, health, and infrastructures) are discussed. An article also evokes the relationship of Siemens with the French nuclear industry

Thermodynamic study of 9-anthracenecarboxylic acid

International Nuclear Information System (INIS)

Ribeiro da Silva, Manuel A.V.; Santos, Ana Filipa L.O.M.; Carneiro, Liliana P.T.; Mendes, Ricardo F.; Rodrigues, Ana Sofia M.C.; Ferreira, Paulo J.O.; Ramos, Rui M.C.

2011-01-01

The standard massic energy of combustion, in oxygen, of the crystalline 9-anthracenecarboxylic acid was measured, at T = 298.15 K, by static-bomb combustion calorimetry, from which the standard molar enthalpy of formation, in the condensed phase, was calculated as Δ f H m 0 (cr)=-(267.3±3.4)kJ.mol -1 . The standard molar enthalpy of sublimation of this acid, at T = 298.15 K, Δ cr g H m 0 =(139.4±0.9)kJ.mol -1 , was determined from the temperature-vapour pressure dependence, obtained by the Knudsen mass-loss effusion method. From the data presented above, the standard molar enthalpy of formation, in the gaseous phase, at T = 298.15 K, was derived, Δ f H m 0 (g)=-(127.9±3.5)kJ.mol -1 . The experimental result is interpreted in terms of enthalpic increments, molecular structure and compared with structurally similar compounds.

Synthesis, characterization and study of the magnetic properties of Zn_9_1_-_x_)Eu_xO (0,0 ≤ x ≤ 0,035) by combustion reaction

International Nuclear Information System (INIS)

Soares, Monica Pereira

2013-01-01

Nanocrystallitics of Zinc Oxide containing different amounts of Europium (Zn_(_1_-_x_)Eu_xO - it being 0,0 ≤ x ≤ 0,035) were synthesized by a combustion reaction, with the aim of evaluating the effect of the concentration of Eu"3"+ in magnetic properties, after obtained. The chemical composition was determined by energy dispersive spectroscopy, X-ray (EDS). The structural characterization was performed by X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), Spectroscopy Photoelectrons Excited by X-Rays (XPS) and Transmission Electron Microscopy (TEM). Crystalline structure powders of ZnO in wurtzite were formed after the thermal treatment at 550°C about one hour, with average size crystallites of 20 nm. The X-Ray Diffraction results showed presence of diffraction peaks of well-defined of ZnO primary characteristic phase and traces of oxide Europium (Eu_2O_3) as secondary stage for samples doped with 3.5% of Eu"3"+. The analyzes showed the magnetic samples exhibit ferromagnetism at room temperature dependent content of ions Eu"3"+, but for the sample doped with 3.5% Europium the magnetization drops considerably, due to the formation of Oxide Europium (Eu_2O_3) non-magnetic. This fact suggests that the ferromagnetism of samples is associated with the Eu"3"+ ions, it is occupying the interstices of matrix semiconductor wafer. (author)

Climate Change Mitigation Technologies: the Siemens Roadmap to Carbon Capture and Storage

Energy Technology Data Exchange (ETDEWEB)

Voges, K.

2007-07-01

A full range of technology options will have to be deployed until 2025 to get the global CO{sub 2} emissions on a 550 ppm stabilization track. The focus of the paper will be on Carbon Capture and Storage (CCS) as an indispensable part of a carbon constrained energy infrastructure. In CCS our main long term focus is clearly on coal based processes. For Greenfield applications Siemens is prioritizing IGCC based pre-combustion capture. Post-combustion capture is pursued for steam power plant retrofit. (a) IGCC with pre-combustion capture: A first F-class based demonstration plant could be available until 2014. The roadmap addresses gasifier scale up, hydrogen burner and turbine development and integration issues. Beyond that a bundle of further efficiency improvement measures will further enhance efficiency and economic competitiveness. (b) Post-combustion capture: The development aims at optimizing existing solvents or developing new ones and integrating the complete unit with its mass and heat interchange system into the power plant. (c) CO{sub 2} Compressors: For efficiency and operating flexibility reasons Siemens Power Generation prefers gear-type compressors instead of single shaft compressors. The improvement of maintainability and the reduced number of stages or corrosion protection are issues addressed in current R and D activities. (auth)

The downregulation of Mcl-1 via USP9X inhibition sensitizes solid tumors to Bcl-xl inhibition

International Nuclear Information System (INIS)

Peddaboina, Chander; Smythe, W Roy; Cao, Xiaobo; Jupiter, Daniel; Fletcher, Steven; Yap, Jeremy L; Rai, Arun; Tobin, Richard P; Jiang, Weihua; Rascoe, Philip; Rogers, M Karen Newell

2012-01-01

It has been shown in many solid tumors that the overexpression of the pro-survival Bcl-2 family members Bcl-xL and Mcl-1 confers resistance to a variety of chemotherapeutic agents. Mcl-1 is a critical survival protein in a variety of cell lineages and is critically regulated via ubiquitination. The Mcl-1, Bcl-xL and USP9X expression patterns in human lung and colon adenocarcinomas were evaluated via immunohistochemistry. Interaction between USP9X and Mcl-1 was demonstrated by immunoprecipitation-western blotting. The protein expression profiles of Mcl-1, Bcl-xL and USP9X in multiple cancer cell lines were determined by western blotting. Annexin-V staining and cleaved PARP western blotting were used to assay for apoptosis. The cellular toxicities after various treatments were measured via the XTT assay. In our current analysis of colon and lung cancer samples, we demonstrate that Mcl-1 and Bcl-xL are overexpressed and also co-exist in many tumors and that the expression levels of both genes correlate with the clinical staging. The downregulation of Mcl-1 or Bcl-xL via RNAi was found to increase the sensitivity of the tumor cells to chemotherapy. Furthermore, our analyses revealed that USP9X expression correlates with that of Mcl-1 in human cancer tissue samples. We additionally found that the USP9X inhibitor WP1130 promotes Mcl-1 degradation and increases tumor cell sensitivity to chemotherapies. Moreover, the combination of WP1130 and ABT-737, a well-documented Bcl-xL inhibitor, demonstrated a chemotherapeutic synergy and promoted apoptosis in different tumor cells. Mcl-1, Bcl-xL and USP9X overexpression are tumor survival mechanisms protective against chemotherapy. USP9X inhibition increases tumor cell sensitivity to various chemotherapeutic agents including Bcl-2/Bcl-xL inhibitors

X11---A graphic interface in the OS-9 real-time environment

International Nuclear Information System (INIS)

Pastore, A.

1990-01-01

X11 is a graphic window manager developed as a joint project of the Masschusetts Institute of Technology and Digital Equipment Corporation. It represents a widely available platform to develop distributed graphic applications using TCP/IP and DECNET. Microware's OS-9 is a real-time operating system widely used inside the physics community. The marriage between OS-9 and X11 should be seen as an attempt to stabilize a wise, open and accepted platform in the physics world to do real-time programming as well as line graphic output. Choosing X11 as our graphic environment should allow applications to run virtually without changes for several years but still be able to use the latest and fastest CPUs/architectures

Activation of 125I-Factor IX and 125I-Factor X: Effect of tissue factor and Factor VII, Factor Xsub(a) and thrombin

International Nuclear Information System (INIS)

Oesterud, B.; Rapaport, S.I.

Activation of Factor IX and Factor X was studied by adding 125 I-Factor IX or 125 I-Factor X to reaction mixtures and quantitating cleavage products by reduced sodium dodecylsulfate gel electrophoresis. Thrombin failed to activate Factors IX or X; Factor Xsub(a) produced insignificant amounts of cleavage products of both factors. In contrast, the reaction product of tissue factor and Factor VII cleaved large amounts of both Factor IX and Factor X in purified systems and in plasma. In incubation mixtures of plasma containing added 125 I-Factor IX or 125 I-Factor X, tissue factor and Ca 2+ ions, the percentage of total radioactivity in the heavy chain peak of 125 I-IXsub(a) and the heavy chain of 125 I-Xsub(a) increased at a similar rate. When the tissue factor was diluted, similar curves were obtained for percent cleavage of 125 I-Factor IX and percent cleavage of 125 I-Factor X plotted against tissue factor concentration. These findings support the hypothesis that activation of Factor IX by the tissue factor-Factor VII reaction product represents a physiologically significant step in normal haemostasis. (author)

Photo neutron dose equivalent rate in 15 MV X-ray beam from a Siemens Primus Linac

Directory of Open Access Journals (Sweden)

A Ghasemi

2015-01-01

Full Text Available Fast and thermal neutron fluence rates from a 15 MV X-ray beams of a Siemens Primus Linac were measured using bare and moderated BF 3 proportional counter inside the treatment room at different locations. Fluence rate values were converted to dose equivalent rate (DER utilizing conversion factors of American Association of Physicist in Medicine′s (AAPM report number 19. For thermal neutrons, maximum and minimum DERs were 3.46 × 10 -6 (3 m from isocenter in +Y direction, 0 × 0 field size and 8.36 × 10 -8 Sv/min (in maze, 40 × 40 field size, respectively. For fast neutrons, maximum DERs using 9" and 3" moderators were 1.6 × 10 -5 and 1.74 × 10 -5 Sv/min (2 m from isocenter in +Y direction, 0 × 0 field size, respectively. By changing the field size, the variation in thermal neutron DER was more than the fast neutron DER and the changes in fast neutron DER were not significant in the bunker except inside the radiation field. This study showed that at all points and distances, by decreasing field size of the beam, thermal and fast neutron DER increases and the number of thermal neutrons is more than fast neutrons.

Molecular and crystal structure of nido-9-C5H5N-11-I-7,8-C2B9H10: supramolecular architecture via hydrogen bonding X-H...I (X = B, C)

International Nuclear Information System (INIS)

Polyanskaya, T.M.

2006-01-01

A monocrystal X-ray diffraction study of a new iodine-containing cluster compound 9-(pyridine)-11-iodo-decahydro-7,8-dicarba-nido-undecaborane [9-C 5 H 5 N-11-I-7,8-C 2 B 9 H 10 ] has been performed. Crystal data: C 7 H 15 B 9 NI, M = 337.39, monoclinic, space group P2 1 /c, unit cell parameters: a=9.348(1) A, b=11.159(1) A, c=13.442(2) A, β=98.13(1) deg, V=1388.1(5) A 3 , Z=4, d calc = 1.614 g/cm 3 , T = 295 K, F(000)=648, μ=2.276 mm -1 . The structure was solved by a direct method and refined in the full-matrix anisotropic approximation (isotropic for hydrogen atoms) to final agreement factors R 1 = 0.0254, wR 2 = 0.0454 for 2437 I hkl >2σ I from 3590 measured I hkl (an Enraf-Nonius CAD-4 diffractometer, λMoK α , graphite monochromator, θ/2θ-scanning). The molecules are joined into a supramolecular assembly by hydrogen bonds X-H...I (X = B, C) [ru

Simultaneous multi-wavelength ultraviolet excited single-phase white light emitting phosphor Ba1-x(Zr,Ti)Si3O9:xEu

Science.gov (United States)

Zhou, Zhenzhen; Liu, Guanghui; Ni, Jia; Liu, Wanlu; Liu, Qian

2018-05-01

A kind of novel compound Ba1-x(Zr,Ti)Si3O9:xEu simultaneously activated by different-valence Eu2+ and Eu3+ ions has been successfully synthesized. The existence of Ti4+-O2- charge transfer (CT) transitions in Ba1-xZrSi3O9:xEu is proved by the photoluminescence spectra and first principle calculations, and the Ti4+ ions come from the impurities in commercial ZrO2 raw materials. Under the excitation of multi-wavelength ultraviolet radiation (λEX = 392, 260, 180 nm), Ba1-xZrSi3O9:xEu (x = 0.15) can directly emit nearly white light. The coexistence of multiple luminescent centers and the energy transfer among Zr4+-O2- CT state, Ti4+-O2- CT state, Eu2+ and Eu3+ ions play important roles in the white light emission. Ba1-xZrSi3O9:xEu (x = 0.15) has good thermal stability, in particular, the intensity of emission spectrum (λEX = 392 nm) at 150 °C is ∼96% of that at room temperature. In general, the multi-wavelength ultraviolet-excited single-phase white light emitting phosphor Ba1-x(Zr,Ti)Si3O9:xEu possesses a promise for applications in white light emitting diodes (WLEDs), agriculture, medicine and other photonic fields.

Piezoelectric properties of nonstoichiometric Sr1-xBi2+2x/3Ta2O9 ceramics

International Nuclear Information System (INIS)

Jain, Rajni; Chauhan, Arun Kumar Singh; Gupta, Vinay; Sreenivas, K.

2005-01-01

The effect of poling on the structural, dielectric, and piezoelectric properties has been investigated for sol-gel-derived strontium bismuth tantalate (SBT) [Sr 1-x Bi 2+2x/3 Ta 2 O 9 ] ceramics with x=0.0,0.15,0.30,0.45. The dielectric and ferroelectric properties are found to improve with increase in x up to 0.3. Beyond x>0.3 the properties are found to degrade due to the limited solid solubility and the presence of a mixed phase of bismuth tantalate (BiTaO 4 ) is detected with x=0.45. Poling treatment reduces the dielectric dispersion and dielectric loss in the frequency range (0.1-100 kHz). The resonance and antiresonance frequencies increase with increase in x (x=0-0.30), and the corresponding minimum impedance decreases. The measured coupling coefficients (k p ) are small (0.0967-0.1) for x=0-0.30, and the electromechanical quality factor (Q m =915) is a maximum for the Sr 0.7 Bi 2.2 Ta 2 O 9 composition (x=0.30). The estimated piezoelectric charge coefficient (d 31 ) and piezoelectric voltage coefficient (g 31 ) are 5.2 pC/N and 5.8x10 -3 V m/N, respectively. The positive values of d 31 and g 31 and the low dielectric permittivity of SBT yield a high value for the hydrostatic coefficients, despite the low charge coefficient of d 33 =24 pC/N. The maximum values of charge coefficient (d h =34 pC/N) and voltage coefficient (g h =39x10 -3 V m/N) are obtained for Sr 0.7 Bi 2.2 Ta 2 O 9 composition, and the estimated hydrostatic figure of merit (d h g h x10 -15 =1215 m 2 /N) is high

Magnetic-entropy change in Mn1.1Fe0.9P0.7As0.3-xGe x

International Nuclear Information System (INIS)

Tegus, O.; Fuquan, B.; Dagula, W.; Zhang, L.; Brueck, E.; Si, P.Z.; Boer, F.R. de; Buschow, K.H.J.

2005-01-01

We have studied the magnetic properties and magnetic-entropy changes of Mn 1.1 Fe 0.9 P 0.7 As 0.3-x Ge x compounds with x = 0, 0.05, 0.1, 0.15 and 0.3. X-ray diffraction (XRD) study shows all the compounds crystallize in the Fe 2 P-type structure. Magnetic measurements show that the Curie temperature increases from 150 K for Mn 1.1 Fe 0.9 P 0.7 As 0.3 to 380 K for Mn 1.1 Fe 0.9 P 0.7 Ge 0.3 . A field-induced first-order magnetic phase transition is observed above the Curie temperature for the compounds with x up to 0.15. There exists an optimal composition in which the first-order phase transition is the sharpest. The optimal composition for this system is x = 0.1. The maximal magnetic-entropy change derived from the magnetization data is about 40 J/(kg K) for a field change from 0 to 3 T

Microstructure and adhesion strength of Sn-9Zn-xAg lead-free solders wetted on Cu substrate

International Nuclear Information System (INIS)

Chang, T.-C.; Chou, S.-M.; Hon, M.-H.; Wang, M.-C.

2006-01-01

The microstructure and adhesion strength of the Sn-9Zn-xAg lead-free solders wetted on Cu substrates have been investigated by differential scanning calorimetry, optical microscopy, scanning electron microscopy, energy dispersive spectrometry and pull-off testing. The liquidus temperatures of the Sn-9Zn-xAg solder alloys are 222.1, 226.7, 231.4 and 232.9 deg. C for x = 2.5, 3.5, 5.0 and 7.5 wt%, respectively. A flat interface can be obtained as wetted at 350 deg. C at a rate of 11.8 mm/s. The adhesion strength of the Sn-9Zn-xAg/Cu interfaces decreases from 23.09 ± 0.31 to 12.32 ± 1.40 MPa with increasing Ag content from 2.5 to 7.5 wt% at 400 deg. C. After heat treatment at 150 deg. C, the adhesion strength of the Sn-9Zn-xAg/Cu interface decreases with increasing aging time

Combustion synthesis of NiO–Ce0.9Gd0.1O1.95 nanocomposite anode and its electrical characteristics of semi-cell configured SOFC assembly

International Nuclear Information System (INIS)

Akbari-Fakhrabadi, A.; Avila, Ricardo E.; Carrasco, Hector E.; Ananthakumar, S.; Mangalaraja, R.V.

2012-01-01

Highlights: ► Combustion synthesis was followed to prepare NiO–GDC nanocomposite. ► NiO–GDC anode was applied over GDC electrolyte to fabricate a semi-cell. ► Electrical conductivity of the semi-cell was characterized. ► Structure, composition, particle size and morphology of NiO–GDC were studied. - Abstract: NiO–Ce 0.9 Gd 0.1 O 1.95 (NiO–10GDC) nanocomposite anode material was synthesized through combustion technique for possible low temperature solid oxide fuel cells (LT–SOFCs). A low weight loss is seen in the TG/DTA thermogram that indicates the complete combustion of the reactant mixtures. The powder X-ray diffraction patterns showed that the presence of NiO, GDC and Ni crystallite phases in the as combusted product. Upon calcination at 600 °C, the metallic Ni oxidized to NiO. TEM images showed a wide size distribution of fine spherical GDC and large irregularly shaped NiO particles. This NiO–10GDC anode material was applied over GDC electrolyte as a porous thin layer. Using this surface engineered GDC electrolyte a semi-cell (electrode/electrolyte structure) was fabricated. The electrical conductivity of the semi-cell was characterized with respect to temperature.

Polymorphism of Bi1-xLnxO1.5 phases (04Ln2O9 (x=0.33; Ln=La, Pr, Nd)

International Nuclear Information System (INIS)

Drache, Michel; Huve, Marielle; Roussel, Pascal; Conflant, Pierre

2003-01-01

The Bi 1-x Ln x O 1.5 solid solutions (Ln=La, Pr, Nd), of the β 2 /β 1 /ε (Bi-Sr-O) structural type, have been investigated in their Ln-rich domains. For Ln=La, Pr, and Nd, the upper limits are 0.35, 0.35 and 0.33, respectively. The Bi 4 Ln 2 O 9 ε phase (x=0.33) appears to be the single definite compound. For Bi 4 La 2 O 9 , Bi 4 Pr 2 O 9 and Bi 4 Nd 2 O 9 , the ε-type cells are respectively: a=9.484(4) A, b=3.982(2) A, c=7.030(3) A, β=104.75(3) deg.; a=9.470(5) A, b=3.945(2) A, c=6.968(4) A, β=104.73(3) deg. and a=9.439(3) A, b=3.944(2) A, c=6.923(2) A, β=105.03(3) deg. . Upon heating, each monoclinic (ε) compound transforms successively into rhombohedral phases (β 2 /β 1 ) and finally into a cubic fluorite-type phase. For La- and Pr-based compounds, all transitions are reversible; for Nd, depending on the thermal treatment, the reversibility of ε→β 2 can be incomplete. These transformations are characterized using X-ray thermodiffractometry, differential thermal analysis, dilatometry and impedance spectroscopy versus temperature. Examination of Bi 4 (Ln, Ln') 2 O 9 samples allows to correlate the evolution of the thermal behavior and of the unit cell parameters, to the lanthanide size. A partial plot of the (Bi 2 O 3 ) 1-x -(La 2 O 3 ) x phase diagram (0≤x≤0.40) is proposed

Electrophoretic deposition of 9-YSZ solid electrolyte on Ni- YSZ composite; Estudos de deposicao eletroforetica de ceramicas de 9-YSZ sobre Ni-YSZ

Energy Technology Data Exchange (ETDEWEB)

Santos, F.S.; Yoshito, W.K.; Lazar, D.R.R.; Ussui, V., E-mail: vussui@ipen.b [Instituto de Pesquisas Energeticas e Nucleares (CCTM/IPEN/CNEN-SP), Sao Paulo, SP (Brazil). Centro de Ciencia e Tecnologia de Materiais

2010-07-01

9-YSZ ceramic and Ni-YSZ metal/ceramic composite are the more commonly used materials for the fabrication of solid oxide fuel cell electrolyte and anode, respectively. The main challenges for these applications are the forming of both materials as superposed double thin layers. In the present work ceramic powder of 9- YSZ was synthesized by a coprecipitation technique and the Ni O-YSZ composite by a combustion technique. The later was formed by uniaxial pressing as cylindrical pellets of 15 mm diameter. Thin ceramic layers of 9-YSZ were deposited on composite pellets from a suspension with 10% solid content by an Electrophoretic Deposition technique. Applied voltage varied in the range of 30 to 200 V and deposition time from 15 to 90 seconds, evaluating the deposited mass, porosity on the interface and adhesion of layers. Resulted ceramics were characterized by X-ray diffraction and were observed in a scanning electron microscope. Results showed that deposited layers are thin ({approx}20{mu}m), dense and have good adhesion on the surface of composite substrate. (author)

Geometric Effects of La1+xMg2-xNi9 (x=0.0～1.0) Ternary Alloys on Their Hydrogen Storage Capacities

Institute of Scientific and Technical Information of China (English)

Zhiqing YUAN; Guanglie LU; Bin LIAO; Yongquan LEI

2005-01-01

Structural analysis was made using X-ray diffraction (XRD) Rietveld refinement on a series of La1+xMg2-xNi9(x=0.0～1.0) ternary alloys. Results showed that each of La1+xMg2-xNi9 alloys was a PuNi3-type structure stacked by LaNi5 and (La, Mg) Ni2 blocks. Electrochemical tests revealed that discharge abilities of these La-Mg-Ni ternary alloys mainly depended on their atomic distances between (La, Mg) and Ni, which could be modified by varying the atomic ratios of La/Mg.

The quaternary arsenide oxides Ce{sub 9}Au{sub 5-x}As{sub 8}O{sub 6} and Pr{sub 9}Au{sub 5-x}As{sub 8}O{sub 6}

Energy Technology Data Exchange (ETDEWEB)

Bartsch, Timo; Hoffmann, Rolf-Dieter; Poettgen, Rainer [Univ. Muenster (Germany). Inst. fuer Anorganische und Analytische Chemie

2016-07-01

The quaternary gold arsenide oxides Ce{sub 9}Au{sub 5-x}As{sub 8}O{sub 6} and Pr{sub 9}Au{sub 5-x}As{sub 8}O{sub 6} were synthesized from the rare earth elements (RE), rare earth oxides, arsenic and gold powder at maximum annealing temperatures of 1173 K. The structures were refined from single crystal X-ray diffractometer data: Pnnm, a=1321.64(6) pm, b=4073.0(3), c=423.96(2), wR2=0.0842, 3106 F{sup 2} values, 160 variables for Ce{sub 9}Au{sub 4.91(4)}As{sub 8}O{sub 6} and Pnnm, a=1315.01(4), b=4052.87(8), c=420.68(1) pm, wR2=0.0865, 5313 F{sup 2} values, 160 variables for Pr{sub 9}Au{sub 4.75(1)}As{sub 8}O{sub 6}. They represent a new structure type and show a further extension of pnictide oxide crystal chemistry. A complex polyanionic gold arsenide network [Au{sub 5}As{sub 8}]{sup 15-} (with some disorder in the gold substructure) is charge compensated with polycationic strands of condensed edge-sharing O rate at RE{sub 4/4} and O rate at RE{sub 4/3} tetrahedra ([RE{sub 4}O{sub 3}]{sub 2}{sup 12+}) as well as RE{sup 3+} cations in cavities.

Conclusive experimental study of prevention measures against sodium combustion residuum reignition. Run-F9-1, Run-F9-2

International Nuclear Information System (INIS)

Ishikawa, Hiroyasu; Ohno, Shuji; Miyahara, Shinya

2004-04-01

Nitrogen gas can be an extinguisher or a mitigating material in the case of sodium leak and fire accident in an air atmosphere, which may occur at a liquid metal cooled nuclear power plant. However, sodium combustion residuum sometimes reignites in the air atmosphere even at room temperature when it was produced by nitrogen gas injection to the burning sodium. Then, in this study we executed conclusive experiments of prevention measures against sodium combustion residuum reignition by a mixture of carbon-dioxide (CO 2 ) gas, humidity and nitrogen gas. The experiments were carried out with the FRAT-1 test equipment; the humidity conditions were changed in air which were used to sodium combustion atmosphere and exposure air for confirmation of prevented combustion residue reignition. First of all, the sodium of about 2.5 kg was leaked in air atmosphere, and next, the sodium combustion was stopped by nitrogen gas injection. Next, the combustion residuum was cooled in the nitrogen atmosphere, and then the combustion residuum was exposed to atmosphere of carbon-dioxide (4%); humidity (6000vppm); oxygen (3%)-nitrogen (based gas) mixture. It was confirmed that the combustion residuum was not reignition even if exposed to the air atmosphere again at the end of experiment. We had confirmed that the prevention measures against sodium combustion residuum reignition to establish by this research were effective. (author)

Seleção de genótipos de cana-de-açúcar para acúmulo de protoporfirina ix com uso de herbicidas inibidores da protox Selection of Sugarcane Genotypes for Protoporphyrin IX Accumulation using Protox-Inhibiting Herbicides

Directory of Open Access Journals (Sweden)

L.R.M. Barberis

2009-01-01

Full Text Available O objetivo do presente trabalho foi selecionar genótipos de cana-de-açúcar por meio de inibidores da PROTOX e antioxidantes para indução do acúmulo de protoporfirina IX (PROTO IX e/ou de seus precursores em plantas. Esses compostos podem ser utilizados como agentes sensibilizantes em terapia fotodinâmica (TFD, os quais possibilitam uma fonte de baixo custo para o tratamento de neoplasias e carcinomas. O experimento foi montado em câmara climatizada, com aplicação de nove tratamentos (1. oxyfluorfen + glutamato monossódico + vitaminas C e E; 2. oxyfluorfen + glutamato monossódico + vitaminas C e E + ácido levulênico; 3. oxyfluorfen; 4. carfentrazone + glutamato monossódico + vitaminas C e E; 5. carfentrazone + glutamato monossódico + vitaminas C e E + ácido levulênico; 6. carfentrazone; 7. testemunha + vitaminas C e E; 8. testemunha + vitaminas C e E + ácido levulênico; e 9. testemunha em oito genótipos de cana-de-açúcar (PO933499, RB806043, RB470355, PO830698, SP701143, PO901387, PO894414 e SP903414, dispostos em esquema fatorial 9 x 8, com quatro repetições. As repetições constituíram-se de folhas (20 cm destacadas de cada genótipo, sendo estas pulverizadas com os tratamentos mencionados, em simulador estacionário. Foram realizadas avaliações visuais de controle aos 2 DAA (dias após aplicação e, no fim do estudo, determinações analíticas via extração da biomassa fresca, verificando os teores de protoporfirina IX por cromatografia líquida de alta eficiência. Os resultados mostraram que em curto prazo foram detectados aumentos significativos nas concentrações de PROTO IX para os genótipos RB470355 e SP903414 submetidos ao tratamento 2 e para o genótipo SP701143 submetido ao tratamento 8, indicando que eles podem ser utilizados como fontes acumuladoras de protoporfirina IX.The objective of this study was to select sugarcane genotypes through PROTOX inhibitors and antioxidants to induce the accumulation

Transition properties of the Be-like X-ray from Mg IX

Indian Academy of Sciences (India)

Feng Hu

2017-11-23

Nov 23, 2017 ... Transition properties of the Be-like Kα X-ray from Mg IX. FENG HU1,3,∗ ... 1. Introduction. Magnesium is one of the most abundant elements in the. Universe, and its .... sion coefficients for the configuration state functions are optimized to ..... The absorption oscillator strengths ( fij) and radiative rate Aji for a ...

Microstructures and phase transformations of Ti-30Zr-xNb (x = 5, 7, 9, 13 at.%) shape memory alloys

Energy Technology Data Exchange (ETDEWEB)

Qu, Wentao; Sun, Xuguang; Yuan, Bifei [School of Mechanical Engineering, Xi' an Shiyou University, Xi' an 710065 (China); Xiong, Chengyang; Zhang, Fei [School of Materials Science and Engineering, Beihang University, Beijing 100191 (China); Li, Yan, E-mail: liyan@buaa.edu.cn [School of Materials Science and Engineering, Beihang University, Beijing 100191 (China); Sun, Baohui [Lanzhou Seemine SMA Co. Ltd., Lanzhou 730010 (China)

2016-12-15

The microstructures, phase transformations and shape memory properties of Ti-30Zr-xNb (x = 5, 7, 9, 13 at.%) alloys were investigated. The X-ray diffraction and transmission electron microscopy observations showed that the Ti-30Zr-5Nb, Ti-30Zr-7/9Nb and Ti-30Zr-13Nb alloys were composed of the hcp α′-martensite, orthorhombic α″-martensite and β phases, respectively. The results indicated the enhanced β-stabilizing effect of Nb in Ti-30Zr-xNb alloys than that in Ti-Nb alloys due to the high content of Zr. The differential scanning calorimetry test indicated that the Ti-30Zr-5Nb alloy displayed a reversible transformation with a high martensitic transformation start temperature of 776 K and a reverse martensitic transformation start temperature (A{sub s}) of 790 K. For the Ti-30Zr-7Nb and Ti-30Zr-9Nb alloys, the martensitic transformation temperatures decreased with the increasing Nb content. Moreover, an ω phase transformation occurred in the both alloys upon heating at a temperature lower than the corresponding A{sub s}, which is prompted by more addition of Nb. Although the critical stress in tension of the three martensitic alloys decreased with increasing Nb content, the Ti-30Zr-9Nb alloy showed a critical stress of as high as 300 MPa. Among all the alloys, the Ti-30Zr-9Nb alloy exhibited the maximum shape memory effect of 1.61%, due to the lowest critical stress for the martensite reorientation. - Highlights: •Ti-30Zr-5Nb alloy is composed of hcp α′-martensite with the M{sub s} of 776 K. •Ti-30Zr-7Nb and Ti-30Zr-9Nb alloys are predominated by orthorhombic α″-martensite. •Ti-30Zr-13Nb alloy consists of a single β phase due to the β-stabilizing effect of Nb. •The martensitic transformation temperatures decrease with increasing Nb content. •Ti-30Zr-9Nb alloy shows the maximum shape memory effect of 1.61%.

Transition from weak ferromagnetism to metamagnetism in the itinerant-electron system Y{sub 1-x}La{sub x}Co{sub 9}Si{sub 4}

Energy Technology Data Exchange (ETDEWEB)

Nishiyama, M; Kohara, T [Graduate School of Material Science, University of Hyogo, Kamigori, Ako-gun, Hyogo 678-1297 (Japan); Nakamura, H [Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501 (Japan)

2010-01-15

The magnetism of solid solution Yi{sub 1-x}La{sub x}Co{sub 9}Si{sub 4} between strongly enhanced Pauli paramagnetic LaCo{sub 9}Si{sub 4} and weakly ferromagnetic YCo{sub 9}Si{sub 4} has been investigated. The Curie temperature T{sub C} in the ferromagnetic region and the metamagnetic transition field H{sub M} in the paramagnetic region change continuously against x and approach zero at the same composition x {approx_equal} 0.15, suggesting the presence of a critical point from spontaneous to field-induced ferromagnetism.

Observation of cosmic hard x-ray by L-3H-9 rocket

International Nuclear Information System (INIS)

Hayakawa, Sachio; Makino, Fumiyoshi; Matsui, Yutaka; Fukada, Yutaka.

1978-01-01

It has been considered that the isotropic constituents of cosmic hard X-ray have their origins outside the galactic system. As the spectra are uncertain, the generation mechanism of X-ray has not been clearly known yet. It was attempted to make more reliable observation by shutter method and the technique removing charged particles, using the L-3H-8 rocket. The equipment consists of NaI scintillation counter, a front counter, a Xenon counter, a UV sensor, a collimator, a shutter and a shutter-driving device. The L-3H-9 rocket was launched on August 16, 1977, and reached height of 310 km in about 300 seconds. Then the observation was started, but it was not able to observe the isotropic constituents of hard X-ray which were aimed at, as the shutter didn't work normally. It is expected to make another observation with the K-9M-64 rocket in August, 1978, after investigating the action of the shutter and employing and improved driving device. (Kobatake, H.)

Analysis of burnup and isotopic compositions of BWR 9 x 9 UO2 fuel assemblies

International Nuclear Information System (INIS)

Suzuki, M.; Yamamoto, T.; Ando, Y.; Nakajima, T.

2012-01-01

In order to extend isotopic composition data focusing on fission product nuclides, measurements are progressing using facilities of JAEA for five samples taken from high burnup BWR 9 x 9 UO 2 fuel assemblies. Neutronics analysis with an infinite assembly model was applied to the preliminary measurement data using a continuous-energy Monte Carlo burnup calculation code MVP-BURN with nuclear libraries based on JENDL-3.3 and JENDL-4.0. The burnups of the samples were determined to be 28.0, 39.3, 56.6, 68.1, and 64.0 GWd/t by the Nd-148 method. They were compared with those calculated using node-average irradiation histories of power and in-channel void fractions which were taken from the plant data. The comparison results showed that the deviations of the calculated burnups from the measurements were -4 to 3%. It was confirmed that adopting the nuclear data library based on JENDL-4.0 reduced the deviations of the calculated isotopic compositions from the measurements for 238 Pu, 144 Nd, 145 Nd, 146 Nd, 148 Nd, 134 Cs, 154 Eu, 152 Sm, 154 Gd, and 157 Gd. On the other hand, the effect of the revision in the nuclear. data library on the neutronics analysis was not significant for major U and Pu isotopes. (authors)

Physiological levels of blood coagulation factors IX and X control coagulation kinetics in an in vitro model of circulating tissue factor

International Nuclear Information System (INIS)

Tormoen, Garth W; Khader, Ayesha; Gruber, András; McCarty, Owen J T

2013-01-01

Thrombosis significantly contributes to cancer morbidity and mortality. The mechanism behind thrombosis in cancer may be circulating tissue factor (TF), as levels of circulating TF are associated with thrombosis. However, circulating TF antigen level alone has failed to predict thrombosis in patients with cancer. We hypothesize that coagulation factor levels regulate the kinetics of circulating TF-induced thrombosis. Coagulation kinetics were measured as a function of individual coagulation factor levels and TF particle concentration. Clotting times increased when pooled plasma was mixed at or above a ratio of 4:6 with PBS. Clotting times increased when pooled plasma was mixed at or above a ratio of 8:2 with factor VII-depleted plasma, 7:3 with factor IX- or factor X-depleted plasmas, or 2:8 with factor II-, V- or VIII-depleted plasmas. Addition of coagulation factors VII, X, IX, V and II to depleted plasmas shortened clotting and enzyme initiation times, and increased enzyme generation rates in a concentration-dependent manner. Only additions of factors IX and X from low-normal to high-normal levels shortened clotting times and increased enzyme generation rates. Our results demonstrate that coagulation kinetics for TF particles are controlled by factor IX and X levels within the normal physiological range. We hypothesize that individual patient factor IX and X levels may be prognostic for susceptibility to circulating TF-induced thrombosis. (paper)

6 MV dosimetric characterization of the 160 MLC, the new Siemens multileaf collimator

International Nuclear Information System (INIS)

Tacke, Martin B.; Nill, Simeon; Haering, Peter; Oelfke, Uwe

2008-01-01

New technical developments constantly aim at improving the outcome of radiation therapy. With the use of a computer-controlled multileaf collimator (MLC), the quality of the treatment and the efficiency in patient throughput is significantly increased. New MLC designs aim to further enhance the advantages. In this article, we present the first detailed experimental investigation of the new 160 MLC TM , Siemens Medical Solutions. The assessment included the experimental investigation of typical MLC characteristics such as leakage, tongue-and-groove effect, penumbra, leaf speed, and leaf positioning accuracy with a 6 MV treatment beam. The leakage is remarkably low with an average of 0.37% due to a new design principle of slightly tilted leaves instead of the common tongue-and-groove design. But due to the tilt, the triangular tongue-and-groove effect occurs. Its magnitude of approximately 19% is similar to the dose defect measured for MLCs with the common tongue-and-groove design. The average longitudinal penumbra measured at depth d max =15 mm with standard 100x100 mm 2 fields is 4.1±0.5 mm for the central range and increases to 4.9±1.3 mm for the entire field range of 400x400 mm 2 . The increase is partly due to the single-focusing design and the large distance between the MLC and the isocenter enabling a large patient clearance. Regarding the leaf speed, different velocity tests were performed. The positions of the moving leaves were continuously recorded with the kilovoltage-imaging panel. The maximum leaf velocities measured were 42.9±0.6 mm/s. In addition, several typical intensity-modulated radiation therapy treatments were performed and the delivery times compared to the Siemens OPTIFOCUS MLC. An average decrease of 11% in delivery time was observed. The experimental results presented in this article indicate that the dosimetric characteristics of the 160 MLC are capable of improving the quality of dose delivery with respect to precision and dose

Transport, Thermal, and Magnetic Properties of YbNi3X9 (X = Al, Ga): A Newly Synthesized Yb-Based Kondo Lattice System

Science.gov (United States)

Yamashita, Tetsuro; Miyazaki, Ryoichi; Aoki, Yuji; Ohara, Shigeo

2012-03-01

We have succeeded in synthesizing a new Yb-based Kondo lattice system, YbNi3X9 (X = Al, Ga). Our study reveals that YbNi3Al9 shows typical features of a heavy-fermion antiferromagnet with a Néel temperature of TN = 3.4 K. All of the properties reflect a competition between the Kondo effect and the crystalline electric field (CEF) effect. The moderate heavy-fermion state leads to an enhanced Sommerfeld coefficient of 100 mJ/(mol\\cdotK2), even if ordered antiferromagnetically. On the other hand, the isostructural gallide YbNi3Ga9 is an intermediate-valence system with a Kondo temperature of TK = 570 K. A large hybridization scale can overcome the CEF splitting energy, and a moderately heavy Fermi-liquid ground state with high local moment degeneracy should form at low temperatures. Note that the quality of single-crystalline YbNi3X9 is extremely high compared with those of other Yb-based Kondo lattice compounds. We conclude that YbNi3X9 is a suitable system for investigating the electronic structure of Yb-based Kondo lattice systems from a heavy-fermion system with an antiferromagnetically ordered ground state to an intermediate-valence system.

Comparison of Ares I-X Wind-Tunnel Derived Buffet Environment with Flight Data

Science.gov (United States)

Piatak, David J.; Sekula, Martin K.; Rausch, Russ D.

2011-01-01

The Ares I-X Flight Test Vehicle (FTV), launched in October 2009, carried with it over 243 buffet verification pressure sensors and was one of the most heavily instrumented launch vehicle flight tests. This flight test represented a unique opportunity for NASA and its partners to compare the wind-tunnel derived buffet environment with that measured during the flight of Ares I-X. It is necessary to define the launch vehicle buffet loads to ensure that structural components and vehicle subsystems possess adequate strength, stress, and fatigue margins when the vehicle structural dynamic response to buffet forcing functions are considered. Ares I-X buffet forcing functions were obtained via wind-tunnel testing of a rigid buffet model (RBM) instrumented with hundreds of unsteady pressure transducers designed to measure the buffet environment across the desired frequency range. This paper discusses the comparison of RBM and FTV buffet environments, including fluctuating pressure coefficient and normalized sectional buffet forcing function root-mean-square magnitudes, frequency content of power-spectral density functions, and force magnitudes of an alternating flow phenomena. Comparison of wind-tunnel model and flight test vehicle buffet environments show very good agreement with root-mean-square magnitudes of buffet forcing functions at the majority of vehicle stations. Spectra proved a challenge to compare because of different wind-tunnel and flight test conditions and data acquisition rates. However, meaningful and promising comparisons of buffet spectra are presented. Lastly, the buffet loads resulting from the transition of subsonic separated flow to supersonic attached flow were significantly over-predicted by wind-tunnel results.

Characterization of SrCo{sub 1.5}Ti{sub 1.5}Fe{sub 9}O{sub 19} hexagonal ferrite synthesized by sol-gel combustion and solid state route

Energy Technology Data Exchange (ETDEWEB)

Vinaykumar, R., E-mail: vinaykumar.r1984@gmail.com; Mazumder, R., E-mail: ranabrata@nitrkl.ac.in; Bera, J., E-mail: jbera@nitrkl.ac.in

2017-05-01

Co-Ti co-substituted SrM hexagonal ferrite (SrCo{sub 1.5}Ti{sub 1.5}Fe{sub 9}O{sub 19}) was synthesized by sol-gel combustion and solid state route. The effects of sources of TiO{sub 2} raw materials; titanium tetra-isopropoxide (TTIP) and titanyl nitrate (TN) on the phase formation behavior and properties of the ferrite were studied. The thermal decomposition behavior of the gel was studied using TG-DSC. The phase formation behavior of the ferrite was studied by using X-ray powder diffraction and FTIR analysis. Phase formation was comparatively easier in the TN-based sol-gel process. The morphology of powder and sintered ferrite was investigated using scanning electron microscope. Magnetic properties like magnetization, coercivity, permeability, tan δ{sub µ} and dielectric properties were investigated. The ferrite synthesized by sol-gel based chemical route showed higher saturation magnetization, permeability and permittivity compared to the ferrite synthesized by solid state route. - Highlights: • SrCo{sub 1.5}Ti{sub 1.5}Fe{sub 9}O{sub 19} ferrite was successfully prepared by sol–gel combustion process. • Sol-gel synthesis of the ferrite using titanyl nitrate has been reported first time. • Phase formation was easier in the titanyl nitrate based sol-gel process. • Better magneto-dielectric properties were observed in sol-gel processed ferrite.

Synthesis of bis-cyclopentadienyl compounds with the 9.9-fluorenylidene bridge. The crystal and molecular structure of [μ-9.9-Flu(η5-Cp)2]ZrCl2

International Nuclear Information System (INIS)

Ivchenko, N.B.; Ivchenko, P.V.; Nifant'ev, I.Eh.; Bagrov, V.V.; Kuz'mina, L.G.

2000-01-01

Effect method for synthesis of ansa-zirconocenes containing short 9,9-fluorenylidene bridges between cyclopentadienyl ligands of zirconium complex was developed. Crystal and molecular structures of one of the complexes synthesized of the composition [μ-9,9-Flu(η 5 -Cp) 2 ]ZrCl 2 (Flu = fluorenylidene, Cp = cydopentadiene) were determined by the method of X-ray diffraction analysis. The compound has a monoclinic cell with the following parameters: a = 11.386 (6), b = 13.555 (5), c = 15.947 (1)A; α = 90 deg, β = 102.59 deg, γ = 90 deg; sp.gr. P2 1 /n, Z 4; d calcld. = 1.512 g/cm 3 [ru

BNFL/Siemens to merge?

International Nuclear Information System (INIS)

Anon.

1997-01-01

Negotiations are being conducted on the creation of a joint venture between British Nuclear Fuels Limited (BNFL) and the German company Siemens. The venture would merge Siemens' nuclear fuel, engineering and construction services businesses with BNFL's Magnox and AGR fuel fabrication business which is based at Springfields in Lancashire. It would incorporate Siemens' share of Nuclear Power International, a joint venture with the French company Framatone which is developing the European Pressurised Water Reactor project, and its US subsidiary Siemens' Power Corp. BNFL's mixed oxide (MOX) fuel fabrication business, its stake in the Dutch-German-UK uranium enrichment company Urenco and its nuclear waste reprocessing business would not be involved. There is already speculation that Siemens' greater input will lead to it taking a majority stake in what will be the world's second largest nuclear fuel manufacturer. Reaction to the news is reported. This has been muted in the United Kingdom, mixed in Germany and adverse in France because of the implications for the Siemens' Framatone collaboration. (UK)

Mixed valent noble metal perovskites Ba/sub 3/B/sup 3 +/Pt/sub x/Ru/sub 2-x//sup 4. 5+/O/sub 9/

Energy Technology Data Exchange (ETDEWEB)

Moessner, B; Kemmler-Sack, S; Ehmann, A [Tuebingen Univ. (Germany, F.R.). Lehrstuhl fuer Anorganische Chemie 2

1982-04-01

In perovskites of type Ba/sub 3/B/sup 3 +/Pt/sub x/Ru/sub 2-x//sup 4.5+/O/sub 9/ the ruthenium can be substituted by platinum up to x = 1. The compounds crystallize in a 1:2 ordered hexagonal BaTiO/sub 3/ structure (sequence (hcc)/sub 2/) with face connected Pt/sub x/Ru/sub 2-x/O/sub 9/ double octahedra. Intensity calculations on powder data of Ba/sub 3/YPt/sub 1/2/Ru/sub 3/2/O/sub 9/ (space group P6/sub 3//mmc) gave a refined, intensity related R' value of 8.6%. The vibrational spectroscopic and catalytic properties are reported.

Electrophoretic deposition of 9-YSZ solid electrolyte on Ni- YSZ composite

International Nuclear Information System (INIS)

Santos, F.S.; Yoshito, W.K.; Lazar, D.R.R.; Ussui, V.

2010-01-01

9-YSZ ceramic and Ni-YSZ metal/ceramic composite are the more commonly used materials for the fabrication of solid oxide fuel cell electrolyte and anode, respectively. The main challenges for these applications are the forming of both materials as superposed double thin layers. In the present work ceramic powder of 9- YSZ was synthesized by a coprecipitation technique and the Ni O-YSZ composite by a combustion technique. The later was formed by uniaxial pressing as cylindrical pellets of 15 mm diameter. Thin ceramic layers of 9-YSZ were deposited on composite pellets from a suspension with 10% solid content by an Electrophoretic Deposition technique. Applied voltage varied in the range of 30 to 200 V and deposition time from 15 to 90 seconds, evaluating the deposited mass, porosity on the interface and adhesion of layers. Resulted ceramics were characterized by X-ray diffraction and were observed in a scanning electron microscope. Results showed that deposited layers are thin (∼20μm), dense and have good adhesion on the surface of composite substrate. (author)

CRISPR/Cas9 Promotes Functional Study of Testis Specific X-Linked Gene In Vivo.

Directory of Open Access Journals (Sweden)

Minyan Li

Full Text Available Mammalian spermatogenesis is a highly regulated multistage process of sperm generation. It is hard to uncover the real function of a testis specific gene in vitro since the in vitro model is not yet mature. With the development of the CRISPR/Cas9 (Clustered Regularly Interspaced Short Palindromic Repeats/CRISPR-associated 9 system, we can now rapidly generate knockout mouse models of testis specific genes to study the process of spermatogenesis in vivo. SYCP3-like X-linked 2 (SLX2 is a germ cell specific component, which contains a Cor1 domain and belongs to the XLR (X-linked, lymphocyte regulated family. Previous studies suggested that SLX2 might play an important role in mouse spermatogenesis based on its subcellular localization and interacting proteins. However, the function of SLX2 in vivo is still elusive. Here, to investigate the functions of SLX2 in spermatogenesis, we disrupted the Slx2 gene by using the CRISPR/Cas9 system. Since Slx2 is a testis specific X-linked gene, we obtained knockout male mice in the first generation and accelerated the study process. Compared with wild-type mice, Slx2 knockout mice have normal testis and epididymis. Histological observation of testes sections showed that Slx2 knockout affected none of the three main stages of spermatogenesis: mitosis, meiosis and spermiogenesis. In addition, we further confirmed that disruption of Slx2 did not affect the number of spermatogonial stem cells, meiosis progression or XY body formation by immunofluorescence analysis. As spermatogenesis was normal in Slx2 knockout mice, these mice were fertile. Taken together, we showed that Slx2 itself is not an essential gene for mouse spermatogenesis and CRISPR/Cas9 technique could speed up the functional study of testis specific X-linked gene in vivo.

Factors affecting the amounts of emissions arising from fluidized bed combustion of solid fuels

International Nuclear Information System (INIS)

Horbaj, P.

1996-01-01

The factors affecting the amounts of nitrogen oxides (NO x ) and sulfur oxides (SO x , i.e. SO 2 + SO 3 ) formed during fluidized bed combustion of fossil fuels are analyzed using both theoretical concepts and experimental data. The factors treated include temperature, excess air, fuel parameters, pressure, degree of combustion gas recycling, combustion distribution along the combustion chamber height, and sulfur trapping processes for NO x , and the Ca/S ratio, fluidized layer height and fluidization rate, granulometry and absorbent type, fluidized layer temperature, and pressure during combustion for SO x . It is concluded that fluidized bed boilers are promising power generating facilities, mitigating the environmental burden arising from fossil fuel combustion. (P.A.). 12 figs., 9 refs

Measurement of the dosimetric parameters for low monitor units in step-and-shoot IMRT delivered by Siemens Artiste linear accelerators; Medida de los parametros dosimetricos para bajo numero de unidades monitor en IMRT segmentada estatica administrada por aceleradores lineales Siemens Artiste

Energy Technology Data Exchange (ETDEWEB)

Rodriguez Rodriguez, C.; Lopez Fernandez, A.; Saez Beltran, M.; Martin Martin, G.; Alonso Iracheta, L.

2012-07-01

Absorbed dose linearity and beam stability, both for low monitor units, are important factors for ensuring planned dose delivery in step-and-shoot IMRT. For Siemens Artiste linear accelerators, under IMRT stable irradiation conditions and for a single segment of 20 cm x 20 cm field size, the linearity of the absorbed dose with the monitor units, field flatness and symmetry have been measured for the range between 1 and 10 monitor units. We have found that absorbed dose linearity with monitor units is within 2% down to 2 monitor units and it is about 9% for 1 monitor unit. Flatness and symmetry values show variations within 1% down to 2 monitor units and increase by 9% for lower values. Using our monitor unit distribution per segment in IMRT we estimate that the uncertainty in absorbed dose for a whole treatment due to these factors is less than 1% (k= 3). (Author) 13 refs.

Prevention and Reversal of Antibody Responses Against Factor IX in Gene Therapy for Hemophilia B

Directory of Open Access Journals (Sweden)

Sushrusha eNayak

2011-12-01

Full Text Available Intramuscular (IM administration of an adeno-associated viral (AAV vector represents a simple and safe method of gene transfer for treatment of the X-linked bleeding disorder hemophilia B (factor IX, F.IX, deficiency. However, the approach is hampered by an increased risk of immune responses against F.IX. Previously, we demonstrated that the drug cocktail of immune suppressants rapamycin, IL-10, and a specific peptide (encoding a dominant CD4+ T cell epitope caused an induction of regulatory T cells (Treg with a concomitant apoptosis of antigen-specific effector T cells (J. Thromb. Haemost. 7:1523, 2009. This protocol was effective in preventing inhibitory antibody formation against human F.IX (hF.IX in muscle gene transfer to C3H/HeJ hemophilia B mice (with targeted F9 gene deletion. Here, we show that this protocol can also be used to reverse inhibitor formation. IM injection of AAV1-hF.IX vector resulted in inhibitors of on average 8-10 BU within 1 month. Subsequent treatment with the tolerogenic cocktail accomplished a rapid reduction of hF.IX-specific antibodies to <2 BU, which lasted for >4.5 months. Systemic hF.IX expression increased from undetectable to >200 ng/ml, and coagulation times improved. In addition, we developed an alternative prophylactic protocol against inhibitor formation that did not require knowledge of T cell epitopes, consisting of daily oral administration of rapamycin for 1-month combined with frequent, low-dose intravenous injection of hF.IX protein. Experiments in T cell receptor transgenic mice showed that the route and dosing schedule of drug administration substantially affected Treg induction. When combined with intravenous antigen administration, oral delivery of rapamycin had to be performed daily in order to induce Treg, which were suppressive and phenotypically comparable to natural Treg.

Hitomi X-ray observation of the pulsar wind nebula G21.5-0.9

Science.gov (United States)

Aharonian, Felix; Akamatsu, Hiroki; Akimoto, Fumie; Allen, Steven W.; Angelini, Lorella; Audard, Marc; Awaki, Hisamitsu; Axelsson, Magnus; Bamba, Aya; Bautz, Marshall W.; Blandford, Roger; Brenneman, Laura W.; Brown, Gregory V.; Bulbul, Esra; Cackett, Edward M.; Chernyakova, Maria; Chiao, Meng P.; Coppi, Paolo S.; Costantini, Elisa; de Plaa, Jelle; de Vries, Cor P.; den Herder, Jan-Willem; Done, Chris; Dotani, Tadayasu; Ebisawa, Ken; Eckart, Megan E.; Enoto, Teruaki; Ezoe, Yuichiro; Fabian, Andrew C.; Ferrigno, Carlo; Foster, Adam R.; Fujimoto, Ryuichi; Fukazawa, Yasushi; Furuzawa, Akihiro; Galeazzi, Massimiliano; Gallo, Luigi C.; Gandhi, Poshak; Giustini, Margherita; Goldwurm, Andrea; Gu, Liyi; Guainazzi, Matteo; Haba, Yoshito; Hagino, Kouichi; Hamaguchi, Kenji; Harrus, Ilana M.; Hatsukade, Isamu; Hayashi, Katsuhiro; Hayashi, Takayuki; Hayashida, Kiyoshi; Hiraga, Junko S.; Hornschemeier, Ann; Hoshino, Akio; Hughes, John P.; Ichinohe, Yuto; Iizuka, Ryo; Inoue, Hajime; Inoue, Yoshiyuki; Ishida, Manabu; Ishikawa, Kumi; Ishisaki, Yoshitaka; Iwai, Masachika; Kaastra, Jelle; Kallman, Tim; Kamae, Tsuneyoshi; Kataoka, Jun; Katsuda, Satoru; Kawai, Nobuyuki; Kelley, Richard L.; Kilbourne, Caroline A.; Kitaguchi, Takao; Kitamoto, Shunji; Kitayama, Tetsu; Kohmura, Takayoshi; Kokubun, Motohide; Koyama, Katsuji; Koyama, Shu; Kretschmar, Peter; Krimm, Hans A.; Kubota, Aya; Kunieda, Hideyo; Laurent, Philippe; Lee, Shiu-Hang; Leutenegger, Maurice A.; Limousin, Olivier; Loewenstein, Michael; Long, Knox S.; Lumb, David; Madejski, Greg; Maeda, Yoshitomo; Maier, Daniel; Makishima, Kazuo; Markevitch, Maxim; Matsumoto, Hironori; Matsushita, Kyoko; McCammon, Dan; McNamara, Brian R.; Mehdipour, Missagh; Miller, Eric D.; Miller, Jon M.; Mineshige, Shin; Mitsuda, Kazuhisa; Mitsuishi, Ikuyuki; Miyazawa, Takuya; Mizuno, Tsunefumi; Mori, Hideyuki; Mori, Koji; Mukai, Koji; Murakami, Hiroshi; Mushotzky, Richard F.; Nakagawa, Takao; Nakajima, Hiroshi; Nakamori, Takeshi; Nakashima, Shinya; Nakazawa, Kazuhiro; Nobukawa, Kumiko K.; Nobukawa, Masayoshi; Noda, Hirofumi; Odaka, Hirokazu; Ohashi, Takaya; Ohno, Masanori; Okajima, Takashi; Ota, Naomi; Ozaki, Masanobu; Paerels, Frits; Paltani, Stéphane; Petre, Robert; Pinto, Ciro; Porter, Frederick S.; Pottschmidt, Katja; Reynolds, Christopher S.; Safi-Harb, Samar; Saito, Shinya; Sakai, Kazuhiro; Sasaki, Toru; Sato, Goro; Sato, Kosuke; Sato, Rie; Sawada, Makoto; Schartel, Norbert; Serlemtsos, Peter J.; Seta, Hiromi; Shidatsu, Megumi; Simionescu, Aurora; Smith, Randall K.; Soong, Yang; Stawarz, Łukasz; Sugawara, Yasuharu; Sugita, Satoshi; Szymkowiak, Andrew; Tajima, Hiroyasu; Takahashi, Hiromitsu; Takahashi, Tadayuki; Takeda, Shin'ichiro; Takei, Yoh; Tamagawa, Toru; Tamura, Takayuki; Tanaka, Takaaki; Tanaka, Yasuo; Tanaka, Yasuyuki T.; Tashiro, Makoto S.; Tawara, Yuzuru; Terada, Yukikatsu; Terashima, Yuichi; Tombesi, Francesco; Tomida, Hiroshi; Tsuboi, Yohko; Tsujimoto, Masahiro; Tsunemi, Hiroshi; Tsuru, Takeshi Go; Uchida, Hiroyuki; Uchiyama, Hideki; Uchiyama, Yasunobu; Ueda, Shutaro; Ueda, Yoshihiro; Uno, Shin'ichiro; Urry, C. Megan; Ursino, Eugenio; Watanabe, Shin; Werner, Norbert; Wilkins, Dan R.; Williams, Brian J.; Yamada, Shinya; Yamaguchi, Hiroya; Yamaoka, Kazutaka; Yamasaki, Noriko Y.; Yamauchi, Makoto; Yamauchi, Shigeo; Yaqoob, Tahir; Yatsu, Yoichi; Yonetoku, Daisuke; Zhuravleva, Irina; Zoghbi, Abderahmen; Sato, Toshiki; Nakaniwa, Nozomu; Murakami, Hiroaki; Guest, Benson

2018-04-01

We present results from the Hitomi X-ray observation of a young composite-type supernova remnant (SNR) G21.5-0.9, whose emission is dominated by the pulsar wind nebula (PWN) contribution. The X-ray spectra in the 0.8-80 keV range obtained with the Soft X-ray Spectrometer (SXS), Soft X-ray Imager, and Hard X-ray Imager (HXI) show a significant break in the continuum as previously found with the NuSTAR observation. After taking into account all known emissions from the SNR other than the PWN itself, we find that the Hitomi spectra can be fitted with a broken power law with photon indices of Γ1 = 1.74 ± 0.02 and Γ2 = 2.14 ± 0.01 below and above the break at 7.1 ± 0.3 keV, which is significantly lower than the NuSTAR result (˜9.0 keV). The spectral break cannot be reproduced by time-dependent particle injection one-zone spectral energy distribution models, which strongly indicates that a more complex emission model is needed, as suggested by recent theoretical models. We also search for narrow emission or absorption lines with the SXS, and perform a timing analysis of PSR J1833-1034 with the HXI and the Soft Gamma-ray Detector. No significant pulsation is found from the pulsar. However, unexpectedly, narrow absorption line features are detected in the SXS data at 4.2345 keV and 9.296 keV with a significance of 3.65 σ. While the origin of these features is not understood, their mere detection opens up a new field of research and was only possible with the high resolution, sensitivity, and ability to measure extended sources provided by an X-ray microcalorimeter.

Hitomi X-ray Observation of the Pulsar Wind Nebula G21.5$-$0.9

OpenAIRE

Hitomi Collaboration; Aharonian, Felix; Akamatsu, Hiroki; Akimoto, Fumie; Allen, Steven W.; Angelini, Lorella; Audard, Marc; Awaki, Hisamitsu; Axelsson, Magnus; Bamba, Aya; Bautz, Marshall W.; Blandford, Roger; Brenneman, Laura W.; Brown, Gregory V.; Bulbul, Esra

2018-01-01

We present results from the Hitomi X-ray observation of a young composite-type supernova remnant (SNR) G21.5$-$0.9, whose emission is dominated by the pulsar wind nebula (PWN) contribution. The X-ray spectra in the 0.8-80 keV range obtained with the Soft X-ray Spectrometer (SXS), Soft X-ray Imager (SXI) and Hard X-ray Imager (HXI) show a significant break in the continuum as previously found with the NuSTAR observation. After taking into account all known emissions from the SNR other than the...

Nuclear magnetic resonance study of hydrogen mobility in LaY2Ni9Hx and CeY2Ni9Hx

International Nuclear Information System (INIS)

Soloninin, A.V.; Buzlukov, A.L.; Skripov, A.V.; Latroche, M.; Paul-Boncour, V.

2009-01-01

In order to investigate the mobility of hydrogen in the ternary compounds LaY 2 Ni 9 and CeY 2 Ni 9 , we have measured the proton nuclear magnetic resonance (NMR) spectra and the proton spin-lattice relaxation rates R 1 for LaY 2 Ni 9 H x (x=0.78 and 10.3) and CeY 2 Ni 9 H x (x=0.79 and 7.2). The measurements have been performed at the resonance frequencies of 14, 23.8 and 90 MHz over the temperature range of 11-404 K. For LaY 2 Ni 9 H x , the behavior of R 1 is consistent with the presence of a considerable contribution due to motionally modulated dipole-dipole interaction between nuclear spins. This contribution can be satisfactorily described in terms of the Bloembergen-Purcell-Pound model with a Gaussian distribution of activation energies for hydrogen diffusion; the value of the average activation energy resulting from such a description for LaY 2 Ni 9 H 10.3 is approximately 0.36 eV. For CeY 2 Ni 9 H x compounds, the measured proton spin-lattice relaxation rates are dominated by the contribution due to the interaction between proton spins and paramagnetic centers over the entire temperature range studied. Only qualitative information on H mobility in these compounds has been obtained from the narrowing of NMR spectra. Possible paths of H diffusion in LaY 2 Ni 9 H x and CeY 2 Ni 9 H x are discussed in terms of the distances between the interstitial sites occupied by hydrogen. - Graphical abstract: The temperature dependences of the proton spin-lattice relaxation rates R 1 measured at 14, 23.8 and 90 MHz for LaY 2 Ni 9 H 10.3 . The frequency-dependent increase in R 1 at T>250 K indicates the onset of the motional contribution to the relaxation rates

Thermal studies of Se85-xTe15Inx (x = 3,6,9,12) glasses

International Nuclear Information System (INIS)

Sushama, D.; George, Achamma; Asokan, S.

2011-01-01

Bulk glasses of compositions Se 85-x Te 15 In x (x = 3,6,9,12) are prepared by melt quenching technique and Differential scanning calorimetry (DSC) is employed to study the thermal stability, crystallization mechanism as well as specific heat of these glasses. It is found that the addition of indium increases the glass transition temperature. From the heating rate dependence of the glass transition temperature the activation energy of glass transition is determined using Kissinger's equation for non-isothermal crystallization of materials. An attempt has been made to explain the variation in the value of T c , T p and ΔC p for the composition Se 73 Te 15 In 12 using rigidity percolation threshold (RPT). From the values of (T c -T g ) the stable glass system is determined.

Two females with mutations in USP9X highlight the variable expressivity of the intellectual disability syndrome.

Science.gov (United States)

Au, P Y B; Huang, L; Broley, S; Gallagher, L; Creede, E; Lahey, D; Ordorica, S; Mina, K; Boycott, K M; Baynam, G; Dyment, D A

2017-07-01

The genetic causes of intellectual disability (ID) are heterogeneous and include both chromosomal and monogenic etiologies. The X-chromosome is known to contain many ID-related genes and males show a marked predominance for intellectual disability. Here we report two females with syndromic intellectual disability. The first individual was relatively mild in her presentation with mild-moderate intellectual disability, hydronephrosis and altered pigmentation along the lines of Blaschko without additional congenital anomalies. A second female presented shortly after birth with dysmorphic facial features, post-axial polydactyly and, on follow-up assessment, demonstrated moderate intellectual disability. Chromosomal studies for Individual 1 identified an X-chromosome deletion due to a de novo pericentric inversion; the inversion breakpoint was associated with deletion of the 5'UTR of the USP9X, a gene which has been implicated in a syndromic intellectual disability affecting females. The second individual had a de novo frameshift mutation detected by whole-exome sequencing that was predicted to be deleterious, NM_001039590.2 (USP9X): c.4104_4105del (p.(Arg1368Serfs*2)). Haploinsufficiency of USP9X in females has been associated with ID and congenital malformations that include heart defects, scoliosis, dental abnormalities, anal atresia, polydactyly, Dandy Walker malformation and hypoplastic corpus callosum. The extent of the congenital malformations observed in Individual 1 was less striking than Individual 2 and other individuals previously reported in the literature, and suggests that USP9X mutations in females can have a wider spectrum of presentation than previously appreciated. Copyright © 2017 Elsevier Masson SAS. All rights reserved.

76 FR 59167 - Siemens Medical Solutions USA, Inc., Oncology Care Systems Division, Concord, CA; Siemens Medical...

Science.gov (United States)

2011-09-23

... Medical Solutions USA, Inc., Oncology Care Systems Division, Concord, CA; Siemens Medical Solutions USA... Solutions USA, Inc. (Siemens), Oncology Care Systems Division, Concord, California (subject firm). The...., Oncology Care Systems Division, Concord, California (TA-W-73,158) and Siemens Medical Solutions USA, Inc...

15 CFR 9.9 - Consumer education.

Science.gov (United States)

2010-01-01

... 15 Commerce and Foreign Trade 1 2010-01-01 2010-01-01 false Consumer education. 9.9 Section 9.9 Commerce and Foreign Trade Office of the Secretary of Commerce PROCEDURES FOR A VOLUNTARY LABELING PROGRAM FOR HOUSEHOLD APPLIANCES AND EQUIPMENT TO EFFECT ENERGY CONSERVATION § 9.9 Consumer education. The...

Laboratory source based full-field x-ray microscopy at 9 keV

Energy Technology Data Exchange (ETDEWEB)

Fella, C.; Balles, A.; Wiest, W. [Lehrstuhl für Röntgenmikroskopie, Julius-Maximilians-Universität, 97074 Würzburg (Germany); Zabler, S.; Hanke, R. [Lehrstuhl für Röntgenmikroskopie, Julius-Maximilians-Universität, 97074 Würzburg (Germany); Fraunhofer Development Center X-Ray Technology (EZRT), Flugplatzstrasse 75, 90768 Fürth (Germany)

2016-01-28

In the past decade, hard x-ray transmission microscopy experienced tremendous developments. With the avail-ability of efficient Fresnel zone plates, even set-ups utilizing laboratory sources were developed [1]. In order to improve the performance of these x-ray microscopes, novel approaches to fabricate optical elements [2] and brighter x-ray tubes [3] are promising candidates. We are currently building a laboratory transmission x-ray microscope for 9.25 keV, using an electron impact liquid-metal-jet anode source. Up to now, the further elements of our setup are: a polycapillary condenser, a tungsten zone plate, and a scintillator which is optically coupled to a CMOS camera. However, further variations in terms of optical elements are intended. Here we present the current status of our work, as well as first experimental results.

Genomic characterisation of Arachis porphyrocalyx (Valls & C.E. Simpson, 2005) (Leguminosae): multiple origin of Arachis species with x = 9

Science.gov (United States)

Celeste, Silvestri María; Ortiz, Alejandra Marcela; Robledo, Germán Ariel; Valls, José Francisco Montenegro; Lavia, Graciela Inés

2017-01-01

Abstract The genus Arachis Linnaeus, 1753 comprises four species with x = 9, three belong to the section Arachis: Arachis praecox (Krapov. W.C. Greg. & Valls, 1994), Arachis palustris (Krapov. W.C. Greg. & Valls, 1994) and Arachis decora (Krapov. W.C. Greg. & Valls, 1994) and only one belongs to the section Erectoides: Arachis porphyrocalyx (Valls & C.E. Simpson, 2005). Recently, the x = 9 species of section Arachis have been assigned to G genome, the latest described so far. The genomic relationship of Arachis porphyrocalyx with these species is controversial. In the present work, we carried out a karyotypic characterisation of Arachis porphyrocalyx to evaluate its genomic structure and analyse the origin of all x = 9 Arachis species. Arachis porphyrocalyx showed a karyotype formula of 14m+4st, one pair of A chromosomes, satellited chromosomes type 8, one pair of 45S rDNA sites in the SAT chromosomes, one pair of 5S rDNA sites and pericentromeric C-DAPI+ bands in all chromosomes. Karyotype structure indicates that Arachis porphyrocalyx does not share the same genome type with the other three x = 9 species and neither with the remaining Erectoides species. Taking into account the geographic distribution, morphological and cytogenetic features, the origin of species with x = 9 of the genus Arachis cannot be unique; instead, they originated at least twice in the evolutionary history of the genus. PMID:28919947

9 CFR 3.9 - Feeding.

Science.gov (United States)

2010-01-01

... 9 Animals and Animal Products 1 2010-01-01 2010-01-01 false Feeding. 3.9 Section 3.9 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE ANIMAL WELFARE... Animal Health and Husbandry Standards § 3.9 Feeding. (a) Dogs and cats must be fed at least once each day...

The Application of Lean Thinking Principles and Kaizen Practices for the Successful Development and Implementation of the Ares I-X Flight Test Rocket and Mission

Science.gov (United States)

Askins, B. R.; Davis, S. R.; Heitzman, K. S.; Olsen, R. A.

2011-01-01

On October 28, 2009 the Ares I-X flight test rocket launched from Kennedy Space Center and flew its suborbital trajectory as designed. The mission was successfully completed as data from the test, and associated development activities were analyzed, transferred to stakeholders, and well documented. A positive lesson learned from Ares I-X was that the application of lean thinking principles and kaizen practices was very effective in streamlining development activities. Ares I-X, like other historical rocket development projects, was hampered by technical, cost, and schedule challenges and if not addressed boldly could have resulted in cancellation of the test. The mission management team conducted nine major meetings, referred to as lean events, across its elements to assess plans, procedures, processes, requirements, controls, culture, organization, use of resources, and anything that could be changed to optimize schedule or reduce risk. The preeminent aspect of the lean events was the focus on value added activities and the removal or at least reduction in non-value added activities. Trained Lean Six Sigma facilitators assisted the Ares I-X developers in conducting the lean events. They indirectly helped formulate the mission s own unique methodology for assessing schedule. A core team was selected to lead the events and report to the mission manager. Each activity leveraged specialized participants to analyze the subject matter and its related processes and then recommended alternatives and solutions. Stakeholders were the event champions. They empowered and encouraged the team to succeed. The keys to success were thorough preparation, honest dialog, small groups, adherence to the Ares I-X ground rules, and accountability through disciplined reporting and tracking of actions. This lean event formula was game-changing as demonstrated by Ares I-X. It is highly recommended as a management tool to help develop other complex systems efficiently. The key benefits for

Depletion of intracellular polyamine content does not alter the survival of 9L rat brain tumour cells after X-irradiation

International Nuclear Information System (INIS)

Seidenfeld, J.; Deen, D.F.; Marton, L.J.

1980-01-01

A 24-hour preincubation of 9L rat brain tumour cells with 10 mM DL-α methylornithine (αMO) reduced 9L putrescine content by more than 97%, spermidine content by 67% and total polyamine content by 50%. This did not increase the sensitivity of 9L cells to killing by X-rays. Polyamine content of treated and untreated cells did not vary with X-ray dose. A similar experiment was performed with 9L cells incubated for 48 hours in the presence and absence of 25 mM DL-α-difluoromethylornithine (DFMO). X-ray dose again did not affect polyamine contents of either DFMO treated or untreated cells. The reduction of total polyamine content by 75% produced by this treatment did not affect the X-ray dose-response curve of 9L cells. Incubation of 9L cells with 40 μM methylglyoxal bis (guanylhydrazone) (MGBG) for 48 hours also did not increase the sensitivity of the treated cells to killing by X-rays. Measurement of intracellular polyamine contents for MGBG-treated and untreated cell showed that Sd was reduced by 70% and Sp by 66%. The increase in Pu content resulted in equal total polyamine contents on a molar basis for both groups of cells. Cultures of 9L cells were incubated for 48 hours in the presence or absence of 40 μM MGBG + 25 mM DFMO, producing an 87% reduction in total polyamine content of treated cells. The Sd content of cells treated with DFMO alone was lower than that of cells treated with DFMO + MGBG, and the combination of the two inhibitors had no effect on the X-ray dose-response. 0.1 mM DFMO did not affect the CFE of untreated unirradiated 9L cells. Addition of 1 mM DFMO caused a greater reduction in the CFE of 9L cells when added at the same time as seeding the cells than when added 24 hours later. There was no difference between the effects of 10 and 25 mM DFMO on the CFE of 9L cells. (U.K.)

Lansoprazole and carbonic anhydrase IX inhibitors sinergize against human melanoma cells.

Science.gov (United States)

Federici, Cristina; Lugini, Luana; Marino, Maria Lucia; Carta, Fabrizio; Iessi, Elisabetta; Azzarito, Tommaso; Supuran, Claudiu T; Fais, Stefano

2016-01-01

Proton Pump Inhibitors (PPIs) reduce tumor acidity and therefore resistance of tumors to drugs. Carbonic Anhydrase IX (CA IX) inhibitors have proven to be effective against tumors, while tumor acidity might impair their full effectiveness. To analyze the effect of PPI/CA IX inhibitors combined treatment against human melanoma cells. The combination of Lansoprazole (LAN) and CA IX inhibitors (FC9-399A and S4) has been investigated in terms of cell proliferation inhibition and cell death in human melanoma cells. The combination of these inhibitors was more effective than the single treatments in both inhibiting cell proliferation and in inducing cell death in human melanoma cells. These results represent the first successful attempt in combining two different proton exchanger inhibitors. This is the first evidence on the effectiveness of a new approach against tumors based on the combination of PPI and CA IX inhibitors, thus providing an alternative strategy against tumors.

Analyzing a low NO[sub x] concentric combustion system

Energy Technology Data Exchange (ETDEWEB)

Kotler, V.R.; Eremeev, A.V.

1992-05-01

Discusses concentric combustion technology developed by Combustion Engineering, Inc. (USA) to reduce NO[sub x] emissions from pulverized coal-fired boilers. The major innovation consists in arranging existing independent secondary air burners into three pairs of concentric combustion burners. Using high-deflection angle concentric combustion burners, higher oxygen concentration near the boiler walls, reduced erosion and lower probability of slag deposition on the heat shield are achieved. The technology was tested at the 165 MW Valmont power plant and 350 MW Cherokee power plant. Reduction of 55.7% (to 0.294 kg/GJ) in NO[sub x] emissions with a boiler efficiency of 86.35% was achieved. Highest NO[sub x] reduction efficiency was observed at full load (highest tertiary air supply). Burner design, performance, relations of NO[sub x] emissions and tertiary air blast as well as fuel entrainment prior to and after upgrading are given. Methods of reducing slag deposition in boilers are considered. 2 refs.

System 80+{trademark} Standard Design: CESSAR design certification. Volume 9: Amendment I

Energy Technology Data Exchange (ETDEWEB)

1990-12-21

This report, entitled Combustion Engineering Standard Safety Analysis Report -- Design Certification (CESSAR-DC), has been prepared in support of the industry effort to standardize nuclear plant designs. These volumes describe the Combustion Engineering, Inc. System 80{sup +}{trademark} Standard Design. This volume 9 discusses Electric Power and Auxiliary Systems.

Development of a NO/x/-free combustion system

Science.gov (United States)

Sadakata, M.; Furusawa, T.; Kunii, D.; Imagawa, M.; Nawada, M.

1980-04-01

The development of a NO(x)-free combustion-heating system realizing both pollution control and energy savings is described. An experiment was carried out by using a small model plant. The system consists of a combustion furnace and a new-type multifunctional heat exchanger. The heat exchanger is a rotary continuous type designed for soot collection and for catalytic combustion of CO and H2 as well as for preheating combustion air.

Morphological and structural characterization of the Zn{sub 0,9}Mn{sub 0,1}O powder synthesized by combustion reaction and Pechini; Caracterizacao estrutural e morfologica de pos de Zn{sub 0,9}Mn{sub 0,1}O sintetizados por reacao de combustao e metodo Pechini

Energy Technology Data Exchange (ETDEWEB)

Ribeiro, M A; Torquato, R; Simoes, A N; Costa, A C.F.M.; Gama, L [Universidade Federal de Campina Grande (DEMA/UFCG), PB (Brazil). Dept. de Engenharia dos Materiais; Kiminami, R H.G.A. [Universidade Federal de Sao Carlos (DEMA/UFSCar), SP (Brazil). Dept. de Engenharia de Materiais

2009-07-01

Zinc oxide, due to the piezoelectric and electro-optical characteristics, is used in application such as, chemical sensor, varistor, transparent conductive thin film and DMS. The aim of this work is to evaluate and compare structural and morphological characteristics of nanometric powders of Zn{sub 0,9}Mn{sub 0,1}O prepared by chemical synthesis of combustion reaction and Pechini method. The powders were characterized by XRD, SEM and BET. The XRD data shown to both studied method the presence of ZnO phase with hexagonal structure and without second phase. The powder prepared by combustion reaction presented 9% of reduction in crystallinity and 42% of increase in surface area in comparison with the powder prepared by Pechini method. The morphological analysis of the powder showed that both method produce powders with soft agglomerates constituted by nano size particles. (author)

Microstructure and hardness of Mg–9Li–6Al–xLa (x=0, 2, 5) alloys during solid solution treatment

Energy Technology Data Exchange (ETDEWEB)

Fei, Pengfei [Key Laboratory of Superlight Materials & Surface Technology, Harbin Engineering University, Ministry of Education, Harbin 150001 (China); Qu, Zhikun [Key Laboratory of Superlight Materials & Surface Technology, Harbin Engineering University, Ministry of Education, Harbin 150001 (China); Harbin Normal University, Harbin 150025 (China); Wu, Ruizhi, E-mail: rzwu@hrbeu.edu.cn [Key Laboratory of Superlight Materials & Surface Technology, Harbin Engineering University, Ministry of Education, Harbin 150001 (China)

2015-02-11

The microstructure evolution of Mg–9Li–6Al–xLa (x=0, 2, 5) alloy under different solid solution parameters was investigated. The results show that, during solution treatment at 350 °C, the lamellar AlLi is precipitated from α-Mg in Mg–9Li–6Al, while the MgLi{sub 2}Al is dissolved into the matrix. However, during solution treatment at 450 °C, the AlLi phase is wholly dissolved into matrix, while the MgLi{sub 2}Al is precipitated from β-Li. The addition of La can reduce the size of α-Mg, restrain the formation of AlLi, and make the precipitated MgLi{sub 2}Al from β-Li at 450 °C be finer than that in Mg–9Li–6Al. With the addition of La, the decrease of the amount of AlLi and MgLi{sub 2}Al leads to a descent of hardness, while the refinement, Al–La phase precipitation, and the solution of Al atoms can improve the hardness of the alloys.

High temperature thermoelectric properties of Ca₃Co₄O_9+δ by auto-combustion synthesis and spark plasma sintering

DEFF Research Database (Denmark)

Wu, NingYu; Holgate, Tim; Van Nong, Ngo

2014-01-01

A rapid method for the synthesis of Ca3Co4O9+δpowder is introduced. The procedure is a modification of the conventional citric-nitrate sol–gelmethod where an auto-combustion process is initiated by a controlled thermal oxidation–reduction reaction. The resulting powders inherit theadvantages...

X-ray spectral line coincidences between fluorine VIII (and IX) and transition metal lines

International Nuclear Information System (INIS)

Charatis, G.; Rockett, P.D.; Burkhalter, P.G.

1983-01-01

X-ray spectroscopy was performed in the 12 to 15 A region, recording L-shell lines from selected laser-irradiated transition metals. Line coincidences and near coincidences were identified between Fe, Cr, Mn, and Ni L-spectra, and F VIII and F IX K-shell lines. Wavelengths were determined to accuracies of 1 to 3 mA and will be utilized in selecting potential pumping candidates in future x-ray lasing schemes. High-resolution x-ray spectra were collected under controlled illumination and target conditions using 1.05 μm and 0.527 μm laser excitation with the KMS CHROMA laser

X-RAY OBSERVATIONS OF THE NEW UNUSUAL MAGNETAR SWIFT J1834.9–0846

International Nuclear Information System (INIS)

Kargaltsev, Oleg; Kouveliotou, Chryssa; Younes, George; Pavlov, George G.; Göğüş, Ersin; Lin, Lin; Kaneko, Yuki; Wachter, Stefanie; Griffith, Roger L.

2012-01-01

We present X-ray observations of the new transient magnetar Swift J1834.9–0846, discovered with the Swift Burst Alert Telescope on 2011 August 7. The data were obtained with Swift, Rossi X-ray Timing Explorer (RXTE), CXO, and XMM-Newton both before and after the outburst. Timing analysis reveals single peak pulsations with a period of 2.4823 s and an unusually high pulsed fraction, 85% ± 10%. Using the RXTE and CXO data, we estimated the period derivative, P-dot =8×10 -12 s s –1 , and confirmed the high magnetic field of the source, B = 1.4 × 10 14 G. The decay of the persistent X-ray flux, spanning 48 days, is consistent with a power law, F∝t –0.5 . In the CXO/Advanced CCD Imaging Spectrometer image, we find that the highly absorbed point source is surrounded by extended emission, which most likely is a dust scattering halo. Swift J1834.9–0846 is located near the center of the radio supernova remnant W41 and TeV source HESS J1834–087. An association with W41 would imply a source distance of about 4 kpc; however, any relation to the HESS source remains unclear, given the presence of several other candidate counterparts for the latter source in the field. Our search for an IR counterpart of Swift J1834.9–0846 revealed no source down to K s ∼ 19.5 within the 0.''6 CXO error circle.

22 CFR 9.9 - Declassification and downgrading.

Science.gov (United States)

2010-04-01

... substantive or procedural right subject to judicial review. (e) Public dissemination of declassified... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Declassification and downgrading. 9.9 Section 9.9 Foreign Relations DEPARTMENT OF STATE GENERAL SECURITY INFORMATION REGULATIONS § 9.9...

9 CFR 91.9 - Swine.

Science.gov (United States)

2010-01-01

... 9 Animals and Animal Products 1 2010-01-01 2010-01-01 false Swine. 91.9 Section 91.9 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE EXPORTATION AND IMPORTATION OF ANIMALS (INCLUDING POULTRY) AND ANIMAL PRODUCTS INSPECTION AND HANDLING OF LIVESTOCK FOR...

42 CFR 9.9 - Facility staffing.

Science.gov (United States)

2010-10-01

... 42 Public Health 1 2010-10-01 2010-10-01 false Facility staffing. 9.9 Section 9.9 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL PROVISIONS STANDARDS OF CARE FOR... Biosafety Officer must have experience in developing and monitoring biohazards and dealing with biosafety...

Intrinsic thermodynamics of inhibitor binding to human carbonic anhydrase IX.

Science.gov (United States)

Linkuvienė, Vaida; Matulienė, Jurgita; Juozapaitienė, Vaida; Michailovienė, Vilma; Jachno, Jelena; Matulis, Daumantas

2016-04-01

Human carbonic anhydrase 9th isoform (CA IX) is an important marker of numerous cancers and is increasingly interesting as a potential anticancer drug target. Various synthetic aromatic sulfonamide-bearing compounds are being designed as potent inhibitors of CA IX. However, sulfonamide compound binding to CA IX is linked to several reactions, the deprotonation of the sulfonamide amino group and the protonation of the CA active site Zn(II)-bound hydroxide. These linked reactions significantly affect the affinities and other thermodynamic parameters such as enthalpies and entropies of binding. The observed and intrinsic affinities of compound binding to CA IX were determined by the fluorescent thermal shift assay. The enthalpies and entropies of binding were determined by the isothermal titration calorimetry. The pKa of CA IX was determined to be 6.8 and the enthalpy of CA IX-Zn(II)-bound hydroxide protonation was -24 kJ/mol. These values enabled the analysis of intrinsic thermodynamics of a library of compounds binding to CA IX. The most strongly binding compounds exhibited the intrinsic affinity of 0.01 nM and the observed affinity of 2 nM. The intrinsic thermodynamic parameters of compound binding to CA IX helped to draw the compound structure to thermodynamics relationship. It is important to distinguish the intrinsic from observed parameters of any disease target protein interaction with its inhibitors as drug candidates when drawing detailed compound structure to thermodynamics correlations. Copyright © 2016 Elsevier B.V. All rights reserved.

A study on the superconducting properties of YBa2Cu9-xNbxOy thin films

International Nuclear Information System (INIS)

Srinivas, S.; Bhatnagar, A.K.; Pinto, R.

1994-01-01

Effect of niobium substitution at the copper site in YBa 2 Cu 9 O 7-x was studied in thin film form. The films were deposited by laser ablation technique using the targets of the YBa 2 Cu 3-x Nb x O y where x = 0.0, 0.025, 0.05, 0.1, 0.2, 0.4, 0.8 and 1.0 under identical deposition conditions on SrTiO 9 substrates. Films were characterized by XRD, resistivity, I-V and J c measurements. Films made from x = 0.025 and 0.05 concentrations of Nb substituted targets showed relatively improved superconducting properties compared to that of undoped films. The best 7 realized for x = 0.025 Nb concentration was 1.8 x 10 σ A/cm 2 and for 0.05 Nb concentration it was 3.2x10 σ A/cm 2 at 77K. However, degradation of the superconducting properties, with the increase of x ≥ 0.1 Nb concentration and drastic suppression and complete loss of superconductivity was noticed for x ≥ 0.4. The growth of impurity phase YBa 2 NbO 6 for x = 0.1 and above of Nb concentration was noticed from XRD patterns. However, the site occupancy of Nb could not be confirmed from these studies

Microstructure and mechanical properties of AC AlSi9CuX alloys

OpenAIRE

L.A. Dobrzański; R. Maniara; M. Krupiński; J.H. Sokołowski

2007-01-01

Purpose: In order to gain a better understanding of how to control the as-cast microstructure, it is important to understand the evaluation of microstructure during solidification and understanding how influence the changes of chemical concentration on this microstructure and mechanical properties. In this research, the effect of Cu content on the microstructure and mechanical properties of AC AlSi9CuX series alloys has been investigated.Design/methodology/approach: The experimental alloy ...

Multilayer beam splitter used in a soft X-ray Mach-Zehnder interferometer at working wavelength of 13.9 nm

International Nuclear Information System (INIS)

Zhang Zhong; Wang Zhanshan; Wang Hongchang; Wang Fengli; Wu Wenjuan; Zhang Shumin; Qin Shuji; Chen Lingyan

2006-01-01

The soft X-ray Mach-Zehnder interferometer is an important tool in measuring the electron densities of laser-produced plasma near the critical surface. The design, fabrication and characterization of multilayer beam splitters at 13.9 nm for soft X-ray Mach-Zehnder interferometer are presented in the paper. The design of beam splitter is completed based on the standard of maximizing product of reflectivity and transmission of the beam splitter at 13.9 nm. The beam splitters, which are Mo/Si multi-layer deposited on 10 mm x 10 mm area, 100 nm thickness Si 3 N 4 membranes, are fabricated using the magnetron sputtering. A method based on extended He-Ne laser beam is developed to analyze the figure error of the beam splitters. The data measured by an optical profiler prove that the method based on visible light is effective to analyze the figure of the beam splitters. The rms figure error of a beam splitter reaches 1.757 nm in the center area 3.82 mm x 3.46 mm and satisfies the need of soft X-ray interference experiment. The product of reflectivity and transmission measured by synchrotron radiation is near to 4%. The Mach-Zehnder interferometer at 13.9 nm based on the multilayer beam splitters is used in 13.9 nm soft X-ray laser interference experiment, in which a clear interferograms of C 8 H 8 laser-produced plasma is got. (authors)

Phosphorylation of Rad9 at serine 328 by cyclin A-Cdk2 triggers apoptosis via interfering Bcl-xL.

Directory of Open Access Journals (Sweden)

Zhuo Zhan

Full Text Available Cyclin A-Cdk2, a cell cycle regulated Ser/Thr kinase, plays important roles in a variety of apoptoticprocesses. However, the mechanism of cyclin A-Cdk2 regulated apoptosis remains unclear. Here, we demonstrated that Rad9, a member of the BH3-only subfamily of Bcl-2 proteins, could be phosphorylated by cyclin A-Cdk2 in vitro and in vivo. Cyclin A-Cdk2 catalyzed the phosphorylation of Rad9 at serine 328 in HeLa cells during apoptosis induced by etoposide, an inhibitor of topoisomeraseII. The phosphorylation of Rad9 resulted in its translocation from the nucleus to the mitochondria and its interaction with Bcl-xL. The forced activation of cyclin A-Cdk2 in these cells by the overexpression of cyclin A,triggered Rad9 phosphorylation at serine 328 and thereby promoted the interaction of Rad9 with Bcl-xL and the subsequent initiation of the apoptotic program. The pro-apoptotic effects regulated by the cyclin A-Cdk2 complex were significantly lower in cells transfected with Rad9S328A, an expression vector that encodes a Rad9 mutant that is resistant to cyclin A-Cdk2 phosphorylation. These findings suggest that cyclin A-Cdk2 regulates apoptosis through a mechanism that involves Rad9phosphorylation.

Distribution of Al atoms in the clathrate-I phase Ba8AlxSi46-x at x = 6.9.

Science.gov (United States)

Bobnar, Matej; Böhme, Bodo; Wedel, Michael; Burkhardt, Ulrich; Ormeci, Alim; Prots, Yurii; Drathen, Christina; Liang, Ying; Nguyen, Hong Duong; Baitinger, Michael; Grin, Yuri

2015-07-28

The clathrate-I phase Ba8AlxSi46-x has been structurally characterized at the composition x = 6.9 (space group Pm3[combining macron]n, no. 223, a = 10.4645(2) Å). A crystal structure model comprising the distribution of aluminium and silicon atoms in the clathrate framework was established: 5.7 Al atoms and 0.3 Si atoms occupy the crystallographic site 6c, while 1.2 Al atoms and 22.8 Si atoms occupy site 24k. The atomic distribution was established based on a combination of (27)Al and (29)Si NMR experiments, X-ray single-crystal diffraction and wavelength-dispersive X-ray spectroscopy.

Sandwich iridium complexes with the monoanionic carborane ligand [9-SMe2-7,8-C2B9H10]-

International Nuclear Information System (INIS)

Loginov, D.A.; Vinogradov, M.M.; Perekalin, D.S.; Starikova, Z.A.; Lysenko, K.A.; Petrovskij, P.V.; Kudinov, A.R.

2006-01-01

The reaction of the [(η-9-SMe 2 -7,8-C 2 B 9 H 10 )IrBr 2 ] 2 complex with Tl[Tl(η-7,8-C 2 B 9 H 11 )] afforded the iridacarborane compound (η-9-SMe 2 -7,8-C 2 B 9 H 10 )Ir(η-7,8-C 2 B 9 H 11 ). The cationic complex [Cp*Ir(η-9-SMe 2 -7,8-C 2 B 9 H 10 )] + PF 6 - (Cp* is pentamethylcyclopentadienyl) was synthesized by the reaction of [Cp*IrCl 2 ] 2 with Na[9-SMe 2 -7,8-C 2 B 9 H 10 ]. The structures of (η-9-SMe 2 -7,8-C 2 B 9 H 10 )Ir(η-cod) (cod is 1,5-cyclooctadiene) and [Cp*Ir(η-9-SMe 2 -7,8-C 2 B 9 H 10 ]PF 6 were established by X-ray diffraction [ru

A Second Generation Swirl-Venturi Lean Direct Injection Combustion Concept

Science.gov (United States)

Tacina, Kathleen M.; Chang, Clarence T.; He, Zhuohui Joe; Lee, Phil; Dam, Bidhan; Mongia, Hukam

2014-01-01

A low-NO (sub x) aircraft gas turbine engine combustion concept was developed and tested. The concept is a second generation swirl-venturi lean direct injection (SV-LDI) concept. LDI is a lean-burn combustion concept in which the fuel is injected directly into the flame zone. Three second generation SV-LDI configurations were developed. All three were based on the baseline 9-point SV-LDI configuration reported previously. These second generation configurations had better low power operability than the baseline 9-point configuration. Two of these second generation configurations were tested in a NASA Glenn Research Center flametube; these two configurations are called the at dome and 5-recess configurations. Results show that the 5-recess configuration generally had lower NO (sub x) emissions than the flat dome configuration. Correlation equations were developed for the flat dome configuration so that the landing-takeoff NO (sub x) emissions could be estimated. The flat dome landing-takeoff NO (sub x) is estimated to be 87-88 percent below the CAEP/6 standards, exceeding the ERA project goal of 75 percent reduction.

Synthesis, structural and dielectric properties of SrBi2- x La x Nb2O9 ceramics prepared by hydrothermal treatment

Science.gov (United States)

Afqir, Mohamed; Tachafine, Amina; Fasquelle, Didier; Elaatmani, Mohamed; Carru, Jean-Claude; Zegzouti, Abdelouahad; Daoud, Mohamed

2018-01-01

SrBi2- x La x Nb2O9 ( x = 0.2, 0.4 and 0.6) Aurivillius materials were prepared by hydrothermal treatment. The powder prepared by this method is highly pure and not agglomerated. The morphology of the samples was characterized by SEM. The dielectric properties of all the compositions were investigated in the temperature range from 25 °C to 500 °C and in the frequency range between 100 Hz and 1 MHz. The dielectric properties at room temperature of the proposed materials can match up with La-doped SrBi2Nb2O9 ceramics prepared via the solid-state reaction method. Partial substitution of bismuth by lanthanum greatly affects the ferroelectric-paraelectric transition temperature, as the ferroelectric-paraelectric phase transition becomes diffuse and the Curie temperature shifts toward lower temperatures typically from 375 to 290 °C. The conductivity results obtained for the samples are explained taking into account the metal-binding energies.

Electrochemical Behavior of Sn-9Zn- xTi Lead-Free Solders in Neutral 0.5M NaCl Solution

Science.gov (United States)

Wang, Zhenghong; Chen, Chuantong; Jiu, Jinting; Nagao, Shijo; Nogi, Masaya; Koga, Hirotaka; Zhang, Hao; Zhang, Gong; Suganuma, Katsuaki

2018-05-01

Electrochemical techniques were employed to study the electrochemical corrosion behavior of Sn-9Zn- xTi ( x = 0, 0.05, 0.1, 0.2 wt.%) lead-free solders in neutral 0.5M NaCl solution, aiming to figure out the effect of Ti content on the corrosion properties of Sn-9Zn, providing information for the composition design of Sn-Zn-based lead-free solders from the perspective of corrosion. EIS results reveal that Ti addition was involved in the corrosion product layer and changed electrochemical interface behavior from charge transfer control process to diffusion control process. The trace amount of Ti addition (0.05 wt.%) can refine the microstructure and improve the corrosion resistance of Sn-9Zn solder, evidenced by much lower corrosion current density ( i corr) and much higher total resistance ( R t). Excess Ti addition (over 0.1 wt.%) led to the formation of Ti-containing IMCs, which were confirmed as Sn3Ti2 and Sn5Ti6, deteriorating the corrosion resistance of Sn-9Zn- xTi solders. The main corrosion products were confirmed as Sn3O(OH)2Cl2 mixed with small amount of chlorine/oxide Sn compounds.

Pharmacogenetic Inhibition of eIF4E-Dependent Mmp9 mRNA Translation Reverses Fragile X Syndrome-like Phenotypes

Directory of Open Access Journals (Sweden)

Christos G. Gkogkas

2014-12-01

Full Text Available Summary: Fragile X syndrome (FXS is the leading genetic cause of autism. Mutations in Fmr1 (fragile X mental retardation 1 gene engender exaggerated translation resulting in dendritic spine dysmorphogenesis, synaptic plasticity alterations, and behavioral deficits in mice, which are reminiscent of FXS phenotypes. Using postmortem brains from FXS patients and Fmr1 knockout mice (Fmr1−/y, we show that phosphorylation of the mRNA 5′ cap binding protein, eukaryotic initiation factor 4E (eIF4E, is elevated concomitant with increased expression of matrix metalloproteinase 9 (MMP-9 protein. Genetic or pharmacological reduction of eIF4E phosphorylation rescued core behavioral deficits, synaptic plasticity alterations, and dendritic spine morphology defects via reducing exaggerated translation of Mmp9 mRNA in Fmr1−/y mice, whereas MMP-9 overexpression produced several FXS-like phenotypes. These results uncover a mechanism of regulation of synaptic function by translational control of Mmp-9 in FXS, which opens the possibility of new treatment avenues for the diverse neurological and psychiatric aspects of FXS. : Fragile X syndrome (FXS is caused by dysregulation of translation in the brain. Gkogkas et al. show that phosphorylation of eukaryotic translation initiation factor 4E (eIF4E is increased in FXS postmortem brains and Fmr1−/y mice. Downregulation of eIF4E phosphorylation in Fmr1−/y mice rescues defects in dendritic spine morphology, synaptic plasticity, and social interaction via normalization of MMP-9 expression.

Effects of aging time on the mechanical properties of Sn–9Zn–1.5Ag–xBi lead-free solder alloys

International Nuclear Information System (INIS)

Liu, Chih-Yao; Hon, Min-Hsiung; Wang, Moo-Chin; Chen, Ying-Ru; Chang, Kuo-Ming; Li, Wang-Long

2014-01-01

Highlights: • The microstructure of these solder alloys are composed of Sn-rich phase and Ag 3 Sn. • The grain size of Sn–9Zn–1.5Ag–xBi solder alloys increases with rose aging time. • The maximum yield strength is 112.7 ± 2.2 MPa for Sn–9Zn–1.5Ag–3Bi solder alloys. • TEM observed that Bi appears as oblong shape fine particles. -- Abstract: The effects of aging time on the mechanical properties of the Sn–9Zn–1.5Ag–xBi lead-free solder alloys are investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), energy dispersive spectrometry (EDS) and a universal testing machine. The experimental results show that the microstructure of Sn–9Zn–1.5Ag–xBi solder alloys is composed of Sn-rich phase and AgZn 3 . No other intermetallic compounds (IMCs) with Bi content was observed in the solder matrix for Sn–9Zn–1.5Ag solder alloys with various Bi contents before and after aging at 150 °C for different durations. The lattice parameter increases significantly with increasing aging time or Bi addition. The size of Sn-rich grain increased gradually with aging time increased, but decreases with Bi content increases. The maximum yield strength is 112.7 ± 2.2 MPa for Sn–9Zn–1.5Ag–3Bi solder alloy before aging

Effects of aging time on the mechanical properties of Sn–9Zn–1.5Ag–xBi lead-free solder alloys

Energy Technology Data Exchange (ETDEWEB)

Liu, Chih-Yao [Department of Materials Science and Engineering, National Cheng Kung University, 1 Ta-Hsueh Road, Tainan 70101, Taiwan (China); Hon, Min-Hsiung [Department of Materials Science and Engineering, National Cheng Kung University, 1 Ta-Hsueh Road, Tainan 70101, Taiwan (China); Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, 415 Chien-Kung Road, Kaohsiung 80782, Taiwan (China); Wang, Moo-Chin, E-mail: mcwang@kmu.edu.tw [Department of Fragrance and Cosmetic Science, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung 80728, Taiwan (China); Chen, Ying-Ru; Chang, Kuo-Ming; Li, Wang-Long [Institute of Nanotechnology and Microsystems Engineering, National Cheng Kung University, No. 1, University Road, Tainan 70101, Taiwan (China)

2014-01-05

Highlights: • The microstructure of these solder alloys are composed of Sn-rich phase and Ag{sub 3}Sn. • The grain size of Sn–9Zn–1.5Ag–xBi solder alloys increases with rose aging time. • The maximum yield strength is 112.7 ± 2.2 MPa for Sn–9Zn–1.5Ag–3Bi solder alloys. • TEM observed that Bi appears as oblong shape fine particles. -- Abstract: The effects of aging time on the mechanical properties of the Sn–9Zn–1.5Ag–xBi lead-free solder alloys are investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), energy dispersive spectrometry (EDS) and a universal testing machine. The experimental results show that the microstructure of Sn–9Zn–1.5Ag–xBi solder alloys is composed of Sn-rich phase and AgZn{sub 3}. No other intermetallic compounds (IMCs) with Bi content was observed in the solder matrix for Sn–9Zn–1.5Ag solder alloys with various Bi contents before and after aging at 150 °C for different durations. The lattice parameter increases significantly with increasing aging time or Bi addition. The size of Sn-rich grain increased gradually with aging time increased, but decreases with Bi content increases. The maximum yield strength is 112.7 ± 2.2 MPa for Sn–9Zn–1.5Ag–3Bi solder alloy before aging.

32 CFR 9.9 - Protection of State secrets.

Science.gov (United States)

2010-07-01

... FOR TRIALS BY MILITARY COMMISSIONS OF CERTAIN NON-UNITED STATES CITIZENS IN THE WAR AGAINST TERRORISM § 9.9 Protection of State secrets. Nothing in this part shall be construed to authorize disclosure of... 32 National Defense 1 2010-07-01 2010-07-01 false Protection of State secrets. 9.9 Section 9.9...

12 CFR 9.9 - Audit of fiduciary activities.

Science.gov (United States)

2010-01-01

... commensurate with the nature and risk of that activity. Thus, certain fiduciary activities may receive audits... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Audit of fiduciary activities. 9.9 Section 9.9... NATIONAL BANKS Regulations § 9.9 Audit of fiduciary activities. (a) Annual audit. At least once during each...

Quality assurance for MR stereotactic imaging for three Siemens scanners

International Nuclear Information System (INIS)

Kozubikova, P.; Novotny, J. Jr.; Kulhova, K.; Mihalova, P.; Tamasova, J.; Veselsk, T.

2014-01-01

Quality assurance of stereotactic imaging, especially with MRI (magnetic resonance imaging), is a complex issue. It can be divided in the basic verification and commissioning of a particular new scanner or a new scanning MRI protocol that is being implemented into a clinical practice and the routine quality assurance performed for each single radiosurgical case. The aim of this study was geometric distortion assessment in MRI with a special PTGR (Physikalisch-Technische Gesellschaft fuer Radiologie - GmbH, Tuebingen, Germany) target phantom. PTGR phantom consists of 21 three-dimensional cross-hairs filled with contrast medium. Cross hairs are positioned at known Leksell coordinates with a precision of better than 0.1 mm and covering the whole stereotactic space. The phantom can be fixed in the Leksell stereotactic frame and thus stereotactic imaging procedures can be reproduced following exactly the same steps as for a real patient, including also the stereotactic image definition in the Leksell GammaPlan. Since the geometric position (stereotactic coordinates) of each cross-hair is known based on the construction of the phantom, it can be compared with the actual measured Leksell coordinates based on the stereotactic MRI. Deviations between expected and actual coordinates provide information about the level of distortion. The measured distortions proved satisfactory accuracy precision for stereotactic localization at 1.5 T Siemens Magnetom Avanto scanner, Siemens Magnetom Symphony scanner and 3T Siemens Magnetom Skyra scanner (Na Homolce Hospital, Prague). The mean distortion for these MR scanners for standard imaging protocol (T1 weighted 3D images) were 0.8 mm, 1.1 mm and 1.1 mm and maximum distortions were 1.3 mm, 1.9 mm and 2.2 mm, respectively.There was detected dependence of the distortions on the slice orientation and the type of imaging protocol. Image distortions are also property of each particular scanner, the worst distortion were observed for 3T

A study on the superconducting properties of YBa{sub 2}Cu{sub 9-x}Nb{sub x}O{sup y} thin films

Energy Technology Data Exchange (ETDEWEB)

Srinivas, S.; Bhatnagar, A.K. [Univ. of Hyderabad (India); Pinto, R. [Solid State Electronics Group, Bombay (India)] [and others

1994-12-31

Effect of niobium substitution at the copper site in YBa{sub 2}Cu{sub 9}O{sub 7-x} was studied in thin film form. The films were deposited by laser ablation technique using the targets of the YBa{sub 2}Cu{sub 3-x}Nb{sub x}O{sub y} where x = 0.0, 0.025, 0.05, 0.1, 0.2, 0.4, 0.8 and 1.0 under identical deposition conditions on SrTiO{sub 9} <100> substrates. Films were characterized by XRD, resistivity, I-V and J{sub c} measurements. Films made from x = 0.025 and 0.05 concentrations of Nb substituted targets showed relatively improved superconducting properties compared to that of undoped films. The best 7 realized for x = 0.025 Nb concentration was 1.8 x 10{sup {sigma}} A/cm{sup 2} and for 0.05 Nb concentration it was 3.2x10{sup {sigma}} A/cm{sup 2} at 77K. However, degradation of the superconducting properties, with the increase of x {ge} 0.1 Nb concentration and drastic suppression and complete loss of superconductivity was noticed for x {ge} 0.4. The growth of impurity phase YBa{sub 2}NbO{sub 6} for x = 0.1 and above of Nb concentration was noticed from XRD patterns. However, the site occupancy of Nb could not be confirmed from these studies.

9 CFR 417.2 - Hazard Analysis and HACCP Plan.

Science.gov (United States)

2010-01-01

... REGULATORY REQUIREMENTS UNDER THE FEDERAL MEAT INSPECTION ACT AND THE POULTRY PRODUCTS INSPECTION ACT HAZARD...) Decomposition; (viii) Parasites; (ix) Unapproved use of direct or indirect food or color additives; and (x... accordance with paragraph (a) of this section, including products in the following processing categories: (i...

Carbonic anhydrase IX (CA IX) mediates tumor cell interactions with microenvironment

Czech Academy of Sciences Publication Activity Database

Závadová, Zuzana; Závada, Jan

2005-01-01

Roč. 13, č. 5 (2005), s. 977-982 ISSN 1021-335X R&D Projects: GA ČR(CZ) GA203/02/0405 Institutional research plan: CEZ:AV0Z50520514 Keywords : carbonic anhydrase IX * cell adhesion * microenvironment Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 1.572, year: 2005

Charge Exchange of Ne^9+ for X-ray Emission

Science.gov (United States)

Lyons, David

2016-01-01

Using the molecular-orbital close-coupling (MOCC) method, single electron capture (SEC) cross sections were computed for Ne^9+ colliding with H.Potential energies and nonadiabatic couplings were calculated and used to obtain the MOCC cross sections which are final-quantum-state-resolved including a separation of singlet and triplet states. Atomic-orbital close-coupling, classical trajectory Monte Carlo, and multichannel Landau-Zener (MCLZ) calculations are also performed. Cross sections for more complicated targets including He, H2, N2, H2O, CO, and CO2, were obtained with the MCLZ method. The SEC results are compared with experimental and other theoretical data, where available. The SEC cross sections are being used in cascade models to predict X-ray emission spectra relevant to solar systemand astrophysical environments.D. Lyons, R. S. Cumbee, P. D. Mullen, P. C. Stancil (UGA), D. R. Schultz (UNT), P. Liebermann (Wuppertal Univ.),R. Buenker (NCSU).This work was partially supported by NASA grant NNX09AC46G.

Study on 9Be(#betta#, n) reaction

International Nuclear Information System (INIS)

Fujishiro, M.; Tabata, T.; Satoh, Y.; Furuta, J.; Okamoto, K.

1982-01-01

In chapter 1 are described measurements of cross sections σ(E sub(#betta#)) of the 9 Be(#betta#, n) reaction with six kinds of radioisotopes. The results were σ(1674.7) = 8.8 +- 1.6, σ(1705.2) = 13.3 +- 2.4, σ(1724.9) = 11.0 +- 2.0, σ(1778.9) = 7.3 +- 1.3, σ(1836.0) = 4.7 +- 0.9, and σ(2167.6) = 1.8 +- 0.4 in unit of 10 - 28 cm 2 . The cross sections measured show a cusp-like peak near the threshold, and its width is narrower than that observed by Jakobson with bremsstrahlung X-rays. Comparison of the present results with theories indicates that mutual agreement is yet qualitative. In chapter 2 is described a measurement of the intensity I(2009.8) of the crossover E4 transition in 46 Ti by applying the 9 Be(#betta#, n) reaction. The observed intensity per decay of 46 Sc was I(2009.8) = (1.2 +- 0.7) x 10 - 7 . From the present result the reduced transition probability B(E4) of the crossover E4 transition between the 2009.8 keV, 4 + excited state and the 0 + ground state of 46 Ti was estimated as B(E4) = (5.2 +- 3.7) x 10 - 99 e 2 .cm 8 . Discussion was given of the presently measured intensity and of nuclear models. (author)

Hyperbolic projections of siemens 3d-mlc leaf paths

International Nuclear Information System (INIS)

Menzies, N.

2004-01-01

Full text: The Siemens Primus linear accelerator has the option of being fitted with a multi-leaf collimator (3D-MLC) that is marketed as having 'double focus', to achieve a constant dose penumbra for all leaf settings. This is achieved by moving the leaves through arcs (similar to some conventional collimator jaws), as well as shaping the leaf side-faces as divergent planes from the x-ray source. One consequence of the mechanical design of the 3D-MLC is that as individual leaves are moved, their projections from the light / x-ray source to the treatment plane follow paths that are hyperbolic, as shown in the figure below. (The eccentricity of the hyperbola is a function of leaf number / distance from centre.) The trajectories of the MLC leaves were modelled (in a spreadsheet) using geometrical projections of the MLC leaves to the treatment plane, with construction details provided in Siemens documentation. The results were checked against the image of the leaf in the linac light field. This problem belongs to the class of conic sections in mathematics, where the intersection of a plane with both nappes of a double right circular cone results in a hyperbola. The good agreement between the model and the light field image provided confirmation of the MLC construction details. AS/NZS 4434.1:1996 (reproduced from IEC 976:1989) provides specifications for maximum deviation from orthogonality of adjacent edges, which can be interpreted for MLC collimators to parallelism of the direction of leaf travel and the adjacent collimator edge (e.g. Elekta ATS). However for the Siemens 'double focused' MLC, it is demonstrated that the geometrical construction of the MLC militates against the leaf image being used for this kind of test. It is also demonstrated that at last one commercial treatment planning system models the Siemens leaf trajectories linearly. The clinical significance of the error in this model is shown to be negligible. Copyright (2004) Australasian College of

Hf{sub 3}Fe{sub 4}Sn{sub 4} and Hf{sub 9}Fe{sub 4−x}Sn{sub 10+x}: Two stannide intermetallics with low-dimensional iron sublattices

Energy Technology Data Exchange (ETDEWEB)

Calta, Nicholas P. [Department of Chemistry, Northwestern University (United States); Kanatzidis, Mercouri G., E-mail: m-kanatzidis@northwestern.edu [Department of Chemistry, Northwestern University (United States); Materials Science Division, Argonne National Laboratory (United States)

2016-04-15

This article reports two new Hf-rich intermetallics synthesized using Sn flux: Hf{sub 3}Fe{sub 4}Sn{sub 4} and Hf{sub 9}Fe{sub 4−x}Sn{sub 10+x}. Hf{sub 3}Fe{sub 4}Sn{sub 4} adopts an ordered variant the Hf{sub 3}Cu{sub 8} structure type in orthorhombic space group Pnma with unit cell edges of a=8.1143(5) Å, b=8.8466(5) Å, and c=10.6069(6) Å. Hf{sub 9}Fe{sub 4−x}Sn{sub 10+x}, on the other hand, adopts a new structure type in Cmc2{sub 1} with unit cell edges of a=5.6458(3) Å, b=35.796(2) Å, and c=8.88725(9) Å for x=0. It exhibits a small amount of phase width in which Sn substitutes on one of the Fe sites. Both structures are fully three-dimensional and are characterized by pseudo one- and two-dimensional networks of Fe–Fe homoatomic bonding. Hf{sub 9}Fe{sub 4−x}Sn{sub 10+x} exhibits antiferromagnetic order at T{sub N}=46(2) K and its electrical transport behavior indicates that it is a normal metal with phonon-dictated resistivity. Hf{sub 3}Fe{sub 4}Sn{sub 4} is also an antiferromagnet with a rather high ordering temperature of T{sub N}=373(5) K. Single crystal resistivity measurements indicate that Hf{sub 3}Fe{sub 4}Sn{sub 4} behaves as a Fermi liquid at low temperatures, indicating strong electron correlation. - Graphical abstract: Slightly different growth conditions in Sn flux produce two new intermetallic compounds: Hf{sub 3}Fe{sub 4}Sn{sub 4} and Hf{sub 9}Fe{sub 4−x}Sn{sub 10+x}. - Highlights: • Single crystals of both Hf{sub 3}Fe{sub 4}Sn{sub 4} and Hf{sub 9}Fe{sub 4−x}Sn{sub 10+x} were grown using Sn flux. • The crystal structures were determined using single crystal X-ray diffraction. • The Fe moments in Hf{sub 3}Fe{sub 4}Sn{sub 4} display AFM order below T{sub N}=373 K. • The Fe moments in Hf{sub 9}Fe{sub 4−x}Sn{sub 10+x} display AFM order below T{sub N}=46 K.

A compact broadband high efficient X-band 9-watt PHEMT MMIC high-power amplifier for phased array radar applications

NARCIS (Netherlands)

Hek, A.P. de; Hunneman, P.A.H.; Demmler, M.; Hulsmann, A.

1999-01-01

ln this paper the development and measurement results of a compact broadband 9-Watt high efficient X-band high-power amplifier are discussed. The described amplifier has the following state-of-the art performance: an average ouput power of 9 Watt, a gain of 20 dB and an average Power Added

Matrix metalloproteinase-9 deletion rescues auditory evoked potential habituation deficit in a mouse model of Fragile X Syndrome.

Science.gov (United States)

Lovelace, Jonathan W; Wen, Teresa H; Reinhard, Sarah; Hsu, Mike S; Sidhu, Harpreet; Ethell, Iryna M; Binder, Devin K; Razak, Khaleel A

2016-05-01

Sensory processing deficits are common in autism spectrum disorders, but the underlying mechanisms are unclear. Fragile X Syndrome (FXS) is a leading genetic cause of intellectual disability and autism. Electrophysiological responses in humans with FXS show reduced habituation with sound repetition and this deficit may underlie auditory hypersensitivity in FXS. Our previous study in Fmr1 knockout (KO) mice revealed an unusually long state of increased sound-driven excitability in auditory cortical neurons suggesting that cortical responses to repeated sounds may exhibit abnormal habituation as in humans with FXS. Here, we tested this prediction by comparing cortical event related potentials (ERP) recorded from wildtype (WT) and Fmr1 KO mice. We report a repetition-rate dependent reduction in habituation of N1 amplitude in Fmr1 KO mice and show that matrix metalloproteinase-9 (MMP-9), one of the known FMRP targets, contributes to the reduced ERP habituation. Our studies demonstrate a significant up-regulation of MMP-9 levels in the auditory cortex of adult Fmr1 KO mice, whereas a genetic deletion of Mmp-9 reverses ERP habituation deficits in Fmr1 KO mice. Although the N1 amplitude of Mmp-9/Fmr1 DKO recordings was larger than WT and KO recordings, the habituation of ERPs in Mmp-9/Fmr1 DKO mice is similar to WT mice implicating MMP-9 as a potential target for reversing sensory processing deficits in FXS. Together these data establish ERP habituation as a translation relevant, physiological pre-clinical marker of auditory processing deficits in FXS and suggest that abnormal MMP-9 regulation is a mechanism underlying auditory hypersensitivity in FXS. Fragile X Syndrome (FXS) is the leading known genetic cause of autism spectrum disorders. Individuals with FXS show symptoms of auditory hypersensitivity. These symptoms may arise due to sustained neural responses to repeated sounds, but the underlying mechanisms remain unclear. For the first time, this study shows deficits

Morphology and optical properties of poly(9,9' dioctyfluorene) films

International Nuclear Information System (INIS)

Ariu, Marilu

2002-01-01

This thesis concerns a study of the optical properties of the polymer poly(9,9'dioctylfluorene) (PFO). Polyfluorene polymers represent the current state-of-the-art materials for use in optoelectronic devices. Recently there has been a growing interest in investigating how changes in polymer morphology affect their optical properties and in turn how such information can be used to optimise device performance. The first part of this thesis deals with the characterization of PFO films prepared in four morphological phases, namely: as spin coated glass (SC PFO), nematic quenched glass (NQ PFO), crystalline (X PFO) and PFO having an extended chain conformation (β-phase PFO). Infrared (FT-IR) and Raman spectroscopy have been used in order to correlate the polymer chain conformations in the four phases with the results reported from optical measurements. In order to do this, it has been necessary to analyse and assign the origin of the vibrational modes detected. This has been achieved via comparison with molecules chemically similar to PFO. Theoretical modelling has been used to confirm our assignment. The changes detected in the Raman and Infrared spectra indicate that the polymer chains adopt a longer conjugation length in the X and β-phase films. It appears that the side chains in the X PFO and β-phase conformation have a lower concentration of defects (alternation of gauche and trans conformation) than is observed in the SC film. Low temperature Raman and photoluminescence (PL) measurements are used to identify the vibrational modes that are more strongly coupled with the S 0- >S 1 electronic transition. The second part of this thesis leads with the study of the influence of temperature on the exciton migration process in the SC and β-phase films. At low temperature the migration process is slower and it is detectable via picosecond time resolved luminescence measurements. I have investigated the effect of temperature on the absorption, PL and PL efficiency (PLQY

NuSTAR study of hard X-ray morphology and spectroscopy of PWN G21.5-0.9

DEFF Research Database (Denmark)

Nynka, Melania; Hailey, Charles J.; Reynolds, Stephen P.

2014-01-01

We present NuSTAR high-energy X-ray observations of the pulsar wind nebula (PWN)/supernova remnant G21.5-0.9. We detect integrated emission from the nebula up to similar to 40 keV, and resolve individual spatial features over a broad X-ray band for the first time. The morphology seen by Nu...

Thermogravimetric study of superconducting YBa2Cu3O9-x in hydrogen

International Nuclear Information System (INIS)

Swaminathan, K.; Janaki, J.; Rao, G.V.N.; Sreedharan, O.M.; Radhakrishnan, T.S.

1988-01-01

The thermogravimetric curve of YBa 2 Cu 3 O 9-x in hydrogen exhibits five steps, the first two corresponding to the reduction of copper oxide to copper by about 683 K (as identified by XRD on quenched samples) followed by three more steps predominantly due to hydration-dehydration behaviour of BaO. The need for blank corrections and the choice of 1223 K as the temperature for the determination of oxygen stoichiometry are discussed. 6 refs.; 2 figs.; 1 table

9 CFR 114.9 - Outline of Production guidelines.

Science.gov (United States)

2010-01-01

... 9 Animals and Animal Products 1 2010-01-01 2010-01-01 false Outline of Production guidelines. 114.9 Section 114.9 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT... REQUIREMENTS FOR BIOLOGICAL PRODUCTS § 114.9 Outline of Production guidelines. Each Outline of Production shall...

Weighted oscillator strengths and lifetimes for the S IX and S X spectra

International Nuclear Information System (INIS)

Borges, F.O.; Cavalcanti, G.H.; Trigueiros, A.G.

2003-01-01

The weighted oscillator strengths (gf) and the lifetimes presented in this work were carried out in a multi configuration Hartree-Fock relativistic (HFR) approach. In this calculation, the electrostatic parameters were optimized by a least-squares procedure, in order to improve the adjustment to experimental energy levels. This method produces gf-values that are in better agreement with intensity observations and lifetime values that are closer to the experimental ones. In this work, we presented all the experimentally known electric dipole S IX and S X spectral lines

Programming in a proposed 9X distributed Ada

Science.gov (United States)

Waldrop, Raymond S.; Volz, Richard A.; Goldsack, Stephen J.; Holzbach-Valero, A. A.

1991-01-01

The studies of the proposed Ada 9X constructs for distribution, now referred to as AdaPT are reported. The goals for this time period were to revise the chosen example scenario and to begin studying about how the proposed constructs might be implemented. The example scenario chosen is the Submarine Combat Information Center (CIC) developed by IBM for the Navy. The specification provided by IBM was preliminary and had several deficiencies. To address these problems, some changes to the scenario specification were made. Some of the more important changes include: (1) addition of a system database management function; (2) addition of a fourth processing unit to the standard resources; (3) addition of an operator console interface function; and (4) removal of the time synchronization function. To implement the CIC scenario in AdaPT, the decided strategy were publics, partitions, and nodes. The principle purpose for implementing the CIC scenario was to demonstrate how the AdaPT constructs interact with the program structure. While considering ways that the AdaPt constructs might be translated to Ada 83, it was observed that the partition construct could reasonably be modeled as an abstract data type. Although this gives a useful method of modeling partitions, it does not at all address the configuration aspects on the node construct.

About the nature of competing interactions in cerium based 1-9-4 compounds; Ueber die Natur konkurrierender Wechselwirkungen in Cer-basierten 1-9-4 Verbindungen

Energy Technology Data Exchange (ETDEWEB)

Gold, Christian

2014-02-04

In addition to the high-temperature superconductors, the so-called heavy fermion systems are among the most fascinating representatives of strongly correlated electron systems. Caused by the competition of Kondo effect, RKKY interaction and electrostatic crystal field effects these compounds reveal a wide variety of different ground state properties. For example, many of these systems are located in the vicinity of a magnetic instability. At such a quantum critical point a continuous transition between two states with different symmetry occurs at absolute zero temperature. Apart from the three classic tuning parameters (i) chemical substitution, (ii) hydrostatic pressure, and (iii) external magnetic field also the reduction of the effective spin degeneracy N, i.e. the reduction of the number of crystal field levels which are shielded by the Kondo effect seems to induce quantum critical behavior. The proximity to a quantum critical point together with an unusually high effective spin degeneracy of N=4 make the ternary 1-9-4 compound CeNi{sub 9}Ge{sub 4} the perfect starting system for experimental studies of this new parameter. For the first and so far only time such a scenario could be observed in the substitution series CeNi{sub 9-x}Cu{sub x}Ge{sub 4} (0≤x≤1). Extensive studies show that in this system quantum criticality is not only caused by the balance between Kondo effect and RKKY interaction but also by a reduction of the effective spin degeneracy. The results on the copper series provided the incentive to synthesize and analyze related systems with regard to quantum criticality in the scope of this work. The focus here was on the systems CeNi{sub 9}Ge{sub 4-x}Si{sub x}, CeNi{sub 9}Ge{sub 4-x}Ga{sub x}, CeNi{sub 9-x}Fe{sub x}Ge{sub 4} and CeNi{sub 9-x}Co{sub x}Ge{sub 4}. This thesis was methodologically supported by X-ray studies, theoretical LDA+U calculations and extensive thermodynamic and magnetic investigations on the macroscopic and microscopic

Thermodynamic calculation and an experimental study of the combustion synthesis of (Mo{sub 1−x}Nb{sub x})Si{sub 2} (0 ⩽ x ⩽ 1)

Energy Technology Data Exchange (ETDEWEB)

Wang, Xiaohong, E-mail: matinbow@163.com; Lu, Qiong; Wu, Guangzhi; Shi, Jialing; Sun, Zhi

2015-08-25

Highlights: • (Mo{sub 1−x}Nb{sub x})Si{sub 2} alloys were synthesized by a simple and energy-saving process of SHS. • Theoretical adiabatic temperature of (Mo{sub 1−x}Nb{sub x})Si{sub 2} was calculated for the first time. • The variation of the actual temperature is consistent with theoretical temperature. - Abstract: The theoretical adiabatic temperature of (Mo{sub 1−x}Nb{sub x})Si{sub 2} (0 ⩽ x ⩽ 1) is calculated. The results indicate that the theoretical adiabatic temperature of (Mo{sub 1−x}Nb{sub x})Si{sub 2} increases with an increasing Nb content when (Mo{sub 1−x}Nb{sub x})Si{sub 2} is of a single-phase structure, but decreases with an increasing Nb content when (Mo{sub 1−x}Nb{sub x})Si{sub 2} is of a double-phase structure. All of the temperatures are higher than 1800 K, indicating that (Mo{sub 1−x}Nb{sub x})Si{sub 2} (0 ⩽ x ⩽ 1) can be prepared by the combustion synthesis method. In this work, (Mo{sub 1−x}Nb{sub x})Si{sub 2} (0 ⩽ x ⩽ 1) alloys are successfully synthesized by the combustion synthesis process from elemental powders of Mo, Nb, and Si. The highest combustion temperature and combustion product structure are studied. The results confirm that the variation of the experimental maximum combustion temperature of (Mo{sub 1−x}Nb{sub x})Si{sub 2} is consistent with that of the theoretical adiabatic temperature. The combustion products are non-equilibrium species, and a supersaturated solid solution of C11{sub b} type (Mo{sub 1−x}Nb{sub x})Si{sub 2} forms during combustion synthesis.

Subpial Adeno-associated Virus 9 (AAV9) Vector Delivery in Adult Mice

Czech Academy of Sciences Publication Activity Database

Tadokoro, T.; Miyanohara, A.; Navarro, M.; Kamizato, K.; Juhás, Štefan; Juhásová, Jana; Maršala, S.; Platoshyn, O.; Curtis, E.; Gabel, B.; Ciacci, J. D.; Lukáčová, N.; Bimbová, K.; Maršala, M.

2017-01-01

Roč. 125, č. 13 (2017), č. článku e55770. ISSN 1940-087X R&D Projects: GA MŠk(CZ) LO1609 Institutional support: RVO:67985904 Keywords : AAV9 * adult mouse Subject RIV: EI - Biotechnology ; Bionics OBOR OECD: Technologies involving the manipulation of cells, tissues, organs or the whole organism (assisted reproduction) Impact factor: 1.232, year: 2016

The hard X-ray view of the young supernova remnant G1.9+0.3

DEFF Research Database (Denmark)

Zoglauer, Andreas; Reynolds, Stephen P.; An, Hongjun

2015-01-01

NuSTAR observed G1.9+0.3, the youngest known supernova remnant in the Milky Way, for 350 ks and detected emission up to ~30 keV. The remnant's X-ray morphology does not change significantly across the energy range from 3 to 20 keV. A combined fit between NuSTAR and Chandra shows that the spectrum...

Hexagonal perovskites with cationic vacancies. 28. Structure of rhombohedral 9 L stacking polytypes Ba/sub 3/Wsub(2-x)sup(VI)Nbsub(x)sup(V)vacantOsub(9-x/2)vacantsub(x/2)

Energy Technology Data Exchange (ETDEWEB)

Kemmler-Sack, S; Treiber, U [Tuebingen Univ. (Germany, F.R.). Lehrstuhl fuer Anorganische Chemie 2

1981-07-01

According to the intensity calculations for Ba/sub 3/Wsub(4/3)Nbsub(2/3)vacantOsub(26/3)vacantsub(1/3) and Ba/sub 3/Nb/sub 2/vacantO/sub 8/vacant(II) these rhombohedral 9 L compounds crystallize in the space group R-3m, sequence (hhc)/sub 3/. The refined, intensity related R' values are 6.9% (Ba/sub 3/Wsub(4/3)Nbsub(2/3)vacantOsub(26/3)vacantsub(1/3)) and 7.2% (Ba/sub 3/Nb/sub 2/vacantO/sub 8/vacant(II)). The relations between the rhombohedral 9 L structure (A/sub 3/M/sub 2/vacantO/sub 9/) and the palmierite type (A/sub 3/M/sub 2/vacantO/sub 8/vacant) are discussed.

X-ray Diffraction Study of Molybdenum Diselenide to 35.9 GPa

International Nuclear Information System (INIS)

Aksoy, R.; Selvi, E.; Ma, Y.

2008-01-01

In situ high-pressure angle dispersive synchrotron X-ray diffraction studies of molybdenum diselenide (MoSe2) were carried out in a diamond-anvil cell to 35.9 GPa. No evidence of a phase transformation was observed in the pressure range. By fitting the pressure-volume data to the third-order Birch-Murnaghan equation of state, the bulk modulus, K0T, was determined to be 45.7±0.3 GPa with its pressure derivative, K'0T, being 11.6±0.1. It was found that the c-axis decreased linearly with pressure at a slope of -0.1593 when pressures were lower than 10 GPa. It showed different linear decrease with the slope of a -0.0236 at pressures higher than 10 GPa.

Performance evaluation of Siemens E.CAM(R) SPECT system at Korle-Bu Teaching Hospital (Ghana)

International Nuclear Information System (INIS)

Sosu, E.K.; Hasford, F.; Amuasi, J.H.

2011-01-01

Performance evaluation tests on Siemens e.cam(R) Signature Series Single Photon Emission Computed Tomography (SPECT)System at Korle-Bu Teaching Hospital (Ghana) were conducted for compliance with Manufacturer's specifications and user's requirements. The tests were performed according to National Electrical Manufacturer's Association protocols, and different measuring instruments and phantoms containing 99m-Tc were used. Extrinsic uniformity, system energy resolution, system spatial resolution (without scattering), detector shield leakage and system planar sensitivity were evaluated. The system energy resolution measured was 9.38 % as against manufacturer's specification of ≤ 9.9 %, Planar sensitivity value measured was 232.92 c/min/mCi while manufacturers' specification was 202 c/min/mCi, and detector shield leakage values measured were 0.001 %, 0.002 % and 0.025 % against an accepted value of < 1 %. The performance evaluation confirmed that the system met requirements for clinical nuclear medicine imaging, and the values could be used as database for future quality control measurements. (au)

Microstructure and adhesion strength of Sn-9Zn-1.5Ag-xBi (x = 0 wt% and 2 wt%)/Cu after electrochemical polarization in a 3.5 wt% NaCl solution

Energy Technology Data Exchange (ETDEWEB)

Li, W.-L. [Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, 415 Chien-Kung Road, Kaohsiung 80782, Taiwan (China); Institute of Nanotechnology and Microsystems Engineering, National Cheng Kung University, 1 Ta-Hsueh Road, Tainan 70101, Taiwan (China); Chen, Y.-R.; Chang, K.-M. [Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, 415 Chien-Kung Road, Kaohsiung 80782, Taiwan (China); Liu, C.-Y.; Hon, M.-H. [Department of Materials Science and Engineering, National Cheng Kung University, 1 Ta-Hsueh Road, Tainan 70101, Taiwan (China); Wang, M.-C. [Faculty of Fragrance and Cosmetics, Kaohsiung Medical University, 100 Shihchuan 1st Road, Kaohsiung 80728, Taiwan (China)], E-mail: mcwang@kmu.edu.tw

2008-08-11

The microstructure and adhesion strength of the Sn-9Zn-1.5Ag-xBi (x = 0 wt% and 2 wt%)/Cu interface after electrochemical polarization have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and pull-off testing. The equilibrium potentials of Sn-9Zn-1.5Ag/Cu and Sn-9Zn-1.5Ag-2Bi/Cu are -1.31 V{sub sce} and -1.22 V{sub sce}, respectively, indicating that Sn-9Zn-1.5Ag-2Bi/Cu has a better corrosion resistance than that of Sn-9Zn-1.5Ag/Cu. The intermetallic compounds of Cu{sub 6}Sn{sub 5}, Cu{sub 5}Zn{sub 8} and Ag{sub 3}Sn are formed at the soldered interface between the Sn-9Zn-1.5Ag-xBi solder alloy and the Cu substrate. The scallop-shaped Cu{sub 6}Sn{sub 5} is close to the Cu substrate and the scallop-shaped Cu{sub 5}Zn{sub 8} is found at the interface in the solder matrix after soldering at 250 deg. C for 10 s. The corrosion products are ZnCl{sub 2}, SnCl{sub 2} and ZnO. On the other hand, pits are also formed on the surface of both solder alloys. The interfacial adhesion strength of the Sn-9Zn-1.5Ag/Cu and Sn-9Zn-1.5Ag-2Bi/Cu decreases from 8.27 {+-} 0.56 MPa and 12.67 {+-} 0.45 MPa to 4.78 {+-} 0.45 MPa and 8.14 {+-} 0.38 MPa, respectively, after electrochemical polarization in a 3.5 wt% NaCl solution. The fracture path of the Sn-9Zn-1.5Ag-2Bi/Cu is along the solder alloy/ZnO and solder/Cu{sub 6}Sn{sub 5} interfaces.

Preferential susceptibility of Th9 and Th2 CD4+ T cells to X4-tropic HIV-1 infection.

Science.gov (United States)

Orlova-Fink, Nina; Chowdhury, Fatema Z; Sun, Xiaoming; Harrington, Sean; Rosenberg, Eric S; Yu, Xu G; Lichterfeld, Mathias

2017-10-23

The functional polarization of CD4 T cells determines their antimicrobial effector profile, but may also impact the susceptibility to infection with HIV-1. Here, we analyzed the susceptibility of CD4 T cells with different functional polarization to infection with X4 and R5-tropic HIV-1. CD4 T cells with a Th1, Th2, Th17, and Th9 polarization were subjected to in-vitro infection assays with X4, R5, or vesicular stomatitis virus-G protein-pseudotyped HIV-1. In addition, we sorted differentially polarized CD4 T-cell subsets from individuals treated with antiretroviral therapy and analyzed the tropism of viral env sequences. Th9-polarized CD4 T cells and, to a lesser extent, Th2-polarized CD4 T cells expressed higher surface levels of CXCR4, and are more permissive to X4-tropic infection in vitro. In contrast, Th1 and Th17 CD4 T cells exhibited stronger surface expression of CCR5, and were more susceptible to infection with R5-tropic viruses. Correspondingly, the distribution of X4-tropic viral sequences in antiretroviral therapy-treated HIV-1-infected patients was biased toward Th9/Th2 cells, whereas R5-tropic sequences were more frequently observed in Th17 cells. CD4 T-cell polarization is associated with a distinct susceptibility to X4 and R5-tropic HIV-1 infection.

OPTICAL PROPERTIES OF THE ULTRALUMINOUS X-RAY SOURCE HOLMBERG IX X-1 AND ITS STELLAR ENVIRONMENT

International Nuclear Information System (INIS)

Grise, F.; Kaaret, P.; Pakull, M. W.; Motch, C.

2011-01-01

Holmberg IX X-1 is an archetypal ultraluminous X-ray source (ULX). Here we study the properties of the optical counterpart and of its stellar environment using optical data from SUBARU/Faint Object Camera and Spectrograph, GEMINI/GMOS-N and Hubble Space Telescope (HST)/Advanced Camera for Surveys, as well as simultaneous Chandra X-ray data. The V ∼ 22.6 spectroscopically identified optical counterpart is part of a loose cluster with an age ∼ sun . The counterpart is more luminous than the other stars of the association, suggesting a non-negligible optical contribution from the accretion disk. An observed UV excess also points to non-stellar light similar to X-ray active low-mass X-ray binaries. A broad He II λ4686 emission line identified in the optical spectrum of the ULX further suggests optical light from X-ray reprocessing in the accretion disk. Using stellar evolutionary tracks, we have constrained the mass of the counterpart to be ∼> 10 M sun , even if the accretion disk contributes significantly to the optical luminosity. Comparison of the photometric properties of the counterpart with binary models show that the donor may be more massive, ∼> 25 M sun , with the ULX system likely undergoing case AB mass transfer. Finally, the counterpart exhibits photometric variability of 0.14 mag between two HST observations separated by 50 days which could be due to ellipsoidal variations and/or disk reprocessing of variable X-ray emission.

Transient failure behavior of HT9

International Nuclear Information System (INIS)

Huang, F.H.

1994-07-01

Alloy HT9 has-been chosen as candidate materials for fast and fusion reactor applications because the.material exhibits excellent resistance to void swelling. However, ferritic alloys are known to undergo a ductile-brittle transition as the test temperature is decreased. This inherent problem has limited their applications to reactor component materials subjected to low neutron exposures. Despite the ductile-brittle transition problem, results show that the materials exhibit superior resistance to fracture under very high neutron fluences at irradiation temperatures above 380C. Results also show that the transient behavior for HT9 cladding specimens taken from the fuel column region and cladding taken from outside the fuel column or unirradiated cladding are the same. HT9 cladding maintained its transient strength with irradiation to a fluence of 9 x 10 22 n/cm 2 (E > 0.1 MeV)

Hemophilia as a defect of the tissue factor pathway of blood coagulation: Effect of factors VIII and IX on factor X activation in a continuous-flow reactor

International Nuclear Information System (INIS)

Repke, D.; Gemmell, C.H.; Guha, A.; Turitto, V.T.; Nemerson, Y.; Broze, G.J. Jr.

1990-01-01

The effect of factors VIII and IX on the ability of the tissue factor-factor VIIa complex to activate factor X was studied in a continuous-flow tubular enzyme reactor. Tissue factor immobilized in a phospholipid bilayer on the inner surface of the tube was exposed to a perfusate containing factors VIIa, VIII, IX, and X flowing at a wall shear rate of 57, 300, or 1130 sec -1 . The addition of factors VIII and IX at their respective plasma concentrations resulted in a further 2 endash-to 3 endash fold increase. The direct activation of factor X by tissue factor-factor VIIa could be virtually eliminated by the lipoprotein-associated coagulation inhibitor. These results suggest that the tissue factor pathway, mediated through factors VIII and IX, produces significant levels of factor Xa even in the presence of an inhibitor of the tissue factor-factor VIIa complex; moreover, the activation is dependent on local shear conditions. These findings are consistent both with a model of blood coagulation in which initiation of the system results from tissue factor and with the bleeding observed in hemophilia

All Prime Contract Awards by State or Country, Place, and Contractor. Part 9 (Annville, Kentucky-Crofton, Maryland)

Science.gov (United States)

1990-01-01

0 c In 0 0 N4 cc 400C N 0N3 00 U 40 N 0*n 04r 000l -4000000 0000000000000000000000 05M-5 WP.- N00 f5 -00 40c 0N 3 C 40 Nf-N4 MN 404 e 4OiC nC 4N N N NN...4-4 -IQ0 1400 IQ 40 .4n 4 4 I in9-40 4 1 2 L >%>- >013 "- >1 9 >4 % -2 1-^" ’-^ > ACca C2de I in. -40 0 zz ix. .Z L z Lz ZZ Lz LZ Z Z )-* 400 U00 0 4

Comparison of Topical Hemostatic Agents in a Swine Model of Extremity Arterial Hemorrhage: BloodSTOP iX Battle Matrix vs. QuikClot Combat Gauze

Directory of Open Access Journals (Sweden)

Huixi Li

2016-04-01

Full Text Available BloodSTOP iX Battle Matrix (BM and QuikClot Combat Gauze (CG have both been used to treat traumatic bleeding. The purpose of this study was to examine the efficacy and initial safety of both products in a swine extremity arterial hemorrhage model, which mimics combat injury. Swine (37.13 ± 0.56 kg, NBM = 11, NCG = 9 were anesthetized and splenectomized. We then isolated the femoral arteries and performed a 6 mm arteriotomy. After 45 s of free bleeding, either BM or CG was applied. Fluid resuscitation was provided to maintain a mean arterial pressure of 65 mmHg. Animals were observed for three hours or until death. Fluoroscopic angiography and wound stability challenge tests were performed on survivors. Tissue samples were collected for histologic examination. Stable hemostasis was achieved in 11/11 BM and 5/9 CG subjects, with recovery of mean arterial pressure and animal survival for three hours (p < 0.05, Odds Ratio (OR = 18.82 (0.85–415.3. Time to stable hemostasis was shorter for the BM-treated group (4.8 ± 2.5 min vs. 58 ± 20.1 min; Median = 2, Interquartile Range (IQR = 0 min vs. Median = 60, IQR = 120 min; p < 0.05 and experienced longer total stable hemostasis (175.2 ± 2.5 min vs. 92.4 ± 29.9 min; Median = 178, IQR = 0 min vs. Median = 120, IQR = 178 min; p < 0.05. Post-treatment blood loss was lower with BM (9.5 ± 2.4 mL/kg, Median = 10.52, IQR = 13.63 mL/kg compared to CG (29.9 ± 9.9 mL/kg, Median = 29.38, IQR = 62.44 mL/kg (p = 0.2875. Standard BM products weighed less compared to CG (6.9 ± 0.03 g vs. 20.2 ± 0.4 g (p < 0.05 and absorbed less blood (3.4 ± 0.8 g vs. 41.9 ± 12.3 g (p < 0.05. Fluoroscopic angiography showed recanalization in 5/11 (BM and 0/5 (CG surviving animals (p = 0.07, OR = 9.3 (0.41–208.8. The wound stability challenge test resulted in wound re-bleeding in 1/11 (BM and 5/5 (CG surviving animals (p < 0.05, OR = 0.013 (0.00045–0.375. Histologic evidence indicated no wound site, distal limb or major

9 CFR 53.9 - Mortgage against animals or materials.

Science.gov (United States)

2010-01-01

... 9 Animals and Animal Products 1 2010-01-01 2010-01-01 false Mortgage against animals or materials. 53.9 Section 53.9 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT....9 Mortgage against animals or materials. When animals or materials have been destroyed pursuant to...

Gravity model improvement using GEOS-3 (GEM 9 and 10)

Science.gov (United States)

Lerch, F. J.; Klosko, S. M.; Laubscher, R. E.; Wagner, C. A.

1977-01-01

The use of collocation permitted GEM 9 to be a larger field than previous derived satellite models, GEM 9 having harmonics complete to 20 x 20 with selected higher degree terms. The satellite data set has approximately 840,000 observations, of which 200,000 are laser ranges taken on 9 satellites equipped with retroreflectors. GEM 10 is complete to 22 x 22 with selected higher degree terms out to degree and order 30 amounting to a total of 592 coefficients. Comparisons with surface gravity and altimeter data indicate a substantial improvement in GEM 9 over previous satellite solutions; GEM 9 is in even closer agreement with surface data than the previously published GEM 6 solution which contained surface gravity. In particular the free air gravity anomalies calculated from GEM 9 and a surface gravity solution are in excellent agreement for the high degree terms.

NuSTAR Study of Hard X-ray Morphology and Spectroscopy G21.5-0.9

Science.gov (United States)

Nynka, Melania; Hailey, Charles J.; Reynolds, Stephen P.; An, Hongjun; Baganoff, Frederick K.; Boggs, Steven E.; Christensen, Finn E.; Craig, William W.; Gotthelf, Eric V.; Grefenstette, Brian W.;

Luminescent properties of red-emitting LiSr4B3O(9−3x/2)Nx:Eu2+ phosphor for white-LEDs

International Nuclear Information System (INIS)

Yu Hua; Deng Degang; Xu Shiqing; Yu Cuiping; Yin Haoyong; Nie Qiulin

2012-01-01

An Eu 2+ -activated oxynitride LiSr (4−y) B 3 O (9−3x/2) N x :yEu 2+ red-emitting phosphor was synthesized by solid-state reactions. The synthesized phosphor crystallized in a cubic system with space group Ia–3d. The LiSr 4 B 3 O (9−3x/2) N x :Eu 2+ phosphors exhibited a broad red emission band with a peak at 610 nm and a full width at half maximum of 106 nm under 410 nm excitation, which is ascribed to the 4f 6 5d 1 →4f 7 transition of Eu 2+ . The optimal doped nitrogen concentration was observed to be x=0.75. The average decay times of two different emission centers were estimated to be 568 and 489 ns in the LiSr 3.99 B 3 O 8.25 N 0.5 :0.01Eu 2+ phosphors, respectively. Concentration quenching of Eu 2+ ions occurred at y=0.07, and the critical distance was determined as 17.86 Å. The non-radiative transitions via dipole–dipole interactions resulted in the concentration quenching of Eu 2+ -site emission centers in the LiSr 4 B 3 O 9 host. These results indicate LiSr 4 B 3 O (9−3x/2) N x :Eu 2+ phosphor is promising for application in white near-UV LEDs. - Highlights: ► An oxynitride LiSr 4 B 3 O 9 N:Eu 2+ red-emitting phosphor was prepared at low synthesis temperature. ► The introduced nitrogen improved the excitation and emission intensity of the phosphor. ► The wide excitation band matches well with near-UV LED chips. ► The emission spectrum of the phosphor showed a broad full width at half maximum of about 106 nm.

9 CFR 317.9 - Labeling of equine products.

Science.gov (United States)

2010-01-01

... 9 Animals and Animal Products 2 2010-01-01 2010-01-01 false Labeling of equine products. 317.9... INSPECTION AND CERTIFICATION LABELING, MARKING DEVICES, AND CONTAINERS General § 317.9 Labeling of equine products. The immediate containers of any equine products shall be labeled to show the kinds of animals...

SO(9,1) invariant matrix formulation of a supermembrane

International Nuclear Information System (INIS)

Fujikawa, K.; Okuyama, K.

1998-01-01

An SO(9,1) invariant formulation of an 11-dimensional supermembrane is presented by combining an SO(10,1) invariant treatment of reparametrization symmetry with an SO(9,1) invariant θ R = 0 gauge of κ-symmetry. The Lagrangian thus defined consists of polynomials in dynamical variables (up to quartic terms in X μ and up to the eighth power in θ), and reparametrization BRST symmetry is manifest. The area preserving diffeomorphism is consistently incorporated and the area preserving gauge symmetry is made explicit. The SO(9,1) invariant theory contains terms which cannot be induced by a naive dimensional reduction of higher-dimensional supersymmetric Yang-Mills theory. The SO(9,1) invariant Hamiltonian and the generator of area preserving diffeomorphism together with the supercharge are matrix regularized by applying the standard procedure. As an application of the present formulation, we evaluate the possible central charges in superalgebra both in the path integral and in the canonical (Dirac) formalism, and we find only the two-form charge [ X μ , X ν ]. (orig.)

Thermal expansion of lanthanum silicate oxyapatite (La9.33+2x(SiO4)6O2+3x), lanthanum oxyorthosilicate (La2SiO5) and lanthanum sorosilicate (La2Si2O7)

International Nuclear Information System (INIS)

Fukuda, Koichiro; Asaka, Toru; Uchida, Tomohiro

2012-01-01

Four types of powder specimens of La 9.33 (SiO 4 ) 6 O 2 (space group P6 3 /m and Z=1), La 9.33+2x (SiO 4 ) 6 O 2+3x with 0.06≤x≤0.13 (P6 3 /m and Z=1), La 2 SiO 5 (P2 1 /c and Z=4) and La 2 Si 2 O 7 (P2 1 /c and Z=4) were examined by high-temperature X-ray powder diffractometry to determine the changes in unit-cell dimensions up to 1473 K. The anisotropy of thermal expansion was demonstrated for the former two crystals to clarify the thermal behaviors of the highly c-axis-oriented polycrystals. With La 9.33 (SiO 4 ) 6 O 2 , the linear expansion coefficient of the a-axis (α a ) was 4.8×10 −6 K −1 and that of the c-axis (α c ) was 1.8×10 −6 K −1 in the temperature range from 298 to 1473 K. The α a - and α c -values of La 9.33+2x (SiO 4 ) 6 O 2+3x (0.06≤x≤0.13) were, respectively, 5.9×10 −6 K −1 and 2.3×10 −6 K −1 . The coefficients of mean linear thermal expansion were 4.9×10 −6 K −1 for La 2 SiO 5 and 6.0×10 −6 K −1 for La 2 Si 2 O 7 , which describe the thermal expansion behaviors of the randomly grain-oriented polycrystalline materials. - Graphical abstarct: Temperature dependence of the coefficients of thermal expansion (CTE). The linear CTE along the a-axes for La 9.33 (SiO 4 ) 6 O 2 and La 9.33+2x (SiO 4 ) 6 O 2+3x with 0.06≤x≤0.13. The mean linear CTE for La 2 SiO 5 and La 2 Si 2 O 7 . Highlights: ► We examined the thermal expansion of La 9.33+2x (SiO 4 ) 6 O 2+3x (x=0 and 0.06≤x≤0.13), La 2 SiO 5 and La 2 Si 2 O 7 ► Unit-cell dimensions were determined up to 1473 K by high-temperature X-ray diffraction ► Anisotropic expansion was clarified for La 9.33+2x (SiO 4 ) 6 O 2+3x (x=0 and 0.06≤x≤0.13) ► Mean linear thermal expansion was determined for La 2 SiO 5 and La 2 Si 2 O 7.

19.-25. IX toimub Rüütelkonna hoones Kumu pärlite nädal...

Index Scriptorium Estoniae

2005-01-01

23. IX kõneleb Anu Allikvee teemal "Eestlane baltisaksa kunstnike vaatepiiris"; 24. IX tutvustab Mai Levin Eugen Dückeri maale, 25. IX Ene Lamp Konrad Mäge. Vt. ka lk. 24 Tähtede nädal 26. IX-2. X - kohtumisõhtutel esinevad Marika ja Heinz Valk, Jüri Kuuskemaa, Sirje Helme, Pekka Vapaavuori, Inge Teder, Rain Lõhmus

Nobel prize winners from Siemens company

International Nuclear Information System (INIS)

Anon

2007-01-01

This paper deals with the history of discoveries and scientists which worked in the Siemens company. First Nobel prize winners from Siemens company was Gustav Ludwig Hertz from Hamburg. In his doctoral dissertation he deals with the study of collisions of electrons with molecules of gases. In the physics this experiment is known as 'Franc and Hertz experiment', which confirmed state of energy in Bohr theory and in 1925 he obtained Nobel prize. In 1945, as a director of the Department of physics in the research laboratories of Siemens, he constructed cyclotron kernel - magnet with mass of 80 tonnes. The second Nobel prize winner was Dennis Gabor worked in the Laboratory for measurement and medicinal technology in Siemensstadt (Berlin). When he tried to increase the resolution of electron microscopy he discovered the holography (method of 3-dimensional imaging). In 1971 he obtained the Nobel prize. The third scientist - Ernst Ruska discovered electron microscope. At Siemens, he was involved in developing the first commercially-produced electron microscope in 1939. In 1986, Ernst Ruska was awarded half of the Nobel Prize in Physics for his many achievements in electron optics.

2,6-Bis(9-ethyl-9H-carbazolylmethylenecyclohexanone

Directory of Open Access Journals (Sweden)

Abdullah M. Asiri

2009-10-01

Full Text Available The title compound, 2,6-bis(ethyl-9-ethyl-9H-carbazolylmethylenecyclohexanone has been synthesized by condensation of 9-ethylcarbazole-3-aldehyde and cyclohexanone in ethanol in the presence of pyridine. The structure of this new compound was confirmed by elemental analysis, IR, 1H NMR, 13C NMR and EI-MS spectral analysis.

Comparison of protoporphyrin IX content and related gene expression in the tissues of chickens laying brown-shelled eggs.

Science.gov (United States)

Li, Guangqi; Chen, Sirui; Duan, Zhongyi; Qu, Lujiang; Xu, Guiyun; Yang, Ning

2013-12-01

Protoporphyrin IX (PpIX), an immediate precursor of heme, is the main pigment resulting in the brown coloration of eggshell. The brownness and uniformity of the eggshell are important marketing considerations. In this study, 9 chickens laying darker brown shelled eggs and 9 chickens laying lighter brown shelled eggs were selected from 464 individually caged layers in a Rhode Island Red pureline. The PpIX contents were measured with a Microplate Reader at the wavelength of 412 nm and were compared in different tissues of the 2 groups. Although no significant difference in serum, bile, and excreta was found between the 2 groups, PpIX content in the shell gland and eggshell of the darker group was higher than in those of the lighter group, suggesting that PpIX was synthesized in the shell gland. We further determined the expression levels of 8 genes encoding enzymes involved in the heme synthesis and transport in the liver and shell gland at 6 h postoviposition by quantitative PCR. The results showed that expression of aminolevulinic acid synthase-1 (ALAS1) was higher in the liver of hens laying darker brown shelled eggs, whereas in the shell gland the expression levels of ALAS1, coproporphyrinogen oxidase (CPOX), ATP-binding cassette family members ABCB7 and ABCG2, and receptor for feline leukemia virus, subgroup C (FLVCR) were significantly higher in the hens laying darker brown shelled eggs. Our results demonstrated that hens laying darker brown shelled eggs could deposit more PpIX onto the eggshell and the brownness of the eggshell was dependent on the total quantity of PpIX in the eggshell. More heme was synthesized in the liver and shell gland of hens laying darker brown shelled eggs than those of hens laying lighter brown shelled eggs. High expression level of ABCG2 might facilitate the accumulation of PpIX in the shell gland.

Standard technical specifications: Combustion engineering plants. Volume 3, Revision 1: Bases (Sections 3.4--3.9)

International Nuclear Information System (INIS)

1995-04-01

This report documents the results of the combined effort of the NRC and the industry to produce improved Standard Technical Specifications (STS), Revision 1 for Combustion Engineering Plants. The changes reflected in Revision 1 resulted from the experience gained from license amendment applications to convert to these improved STS or to adopt partial improvements to existing technical specifications. This NUREG is the result of extensive public technical meetings and discussions between the Nuclear Regulatory Commission (NRC) staff and various nuclear power plant licensees, Nuclear Steam Supply System (NSSS) Owners Groups, NSSS vendors, and the Nuclear Energy Institute (NEI). The improved STS were developed based on the criteria in the Final Commission Policy Statement on Technical Specifications Improvements for Nuclear Power Reactors, dated July 22, 1993. The improved STS will be used as the basis for individual nuclear power plant licensees to develop improved plant-specific technical specifications. This report contains three volumes. Volume 1 contains the Specifications for all chapters and sections of the improved STS. Volume 2 contains the Bases for Chapters 2.0 and 3.0, and Sections 3.1--3.3 of the improved STS Volume 3 contains the Bases for Sections 3.4--3.9 of the improved STS

La{sub 2-x}Sr{sub x}NiO{sub 4+{delta}} ceramic powders prepared by combustion synthesis

Energy Technology Data Exchange (ETDEWEB)

Colomer, M.T.; Chinarro, E.; Jurado, J.R. [Consejo Nacional de Investigaciones Cientificas, Madrid (Spain). Ist. de Ceramica y Vidrio

2002-07-01

Combustion synthesis provides an attractive method of producing ceramic powders because of its low cost, process simplicity and fastness. Materials based on La{sub 2}NiO{sub 4+{delta}} can be successfully prepared by combustion synthesis. La{sub 2-x}Sr{sub x}NiO{sub 4+{delta}} (x = 0, 0.1) accommodates oxygen excess by oxygen interstitials rather than by the more usual cation vacancies. A high concentration of oxygen interstitials offers the possibility of rapid oxygen transport through the ceramic material and thus provide a new type of mixed ionic-electronic conductor. The fast oxide ion diffusion combined with its thermal stability indicate that these materials would be good candidates for use in ceramic oxygen generators (COGs) and intermediate temperature solid oxide fuel cells (IT-SOFCs). The present work discusses a combustion synthesis technique to prepare La{sub 2-x}Sr{sub x}NiO{sub 4+{delta}} (x = 0, 0.1) powders using the corresponding metal nitrates-urea mixtures, at low temperature and short reaction times. The as-prepared combustion powders were characterized by XRD, DTA-TG, SEM/TEM-EDX and BET. La{sub 2-x}Sr{sub x}NiO{sub 4} (x = 0, 0.1) powders with a good compositional control and homogeneity are attained. The as-prepared powders obtained at 300 C (ignition temperature) showed much higher specific surface area than powders obtained via alternative routes and contained La{sub 2-x}Sr{sub x}NiO{sub 4+{delta}}, as the major phase present, together with La{sub 2}O{sub 3} and a small amount of NiO. La{sub 2-x}Sr{sub x}NiO{sub 4+{delta}} single phase is achieved, respectively at 950 C for x =0.1 and at 975 C for x = 0. (orig.)

Evolved Cas9 variants with broad PAM compatibility and high DNA specificity.

Science.gov (United States)

Hu, Johnny H; Miller, Shannon M; Geurts, Maarten H; Tang, Weixin; Chen, Liwei; Sun, Ning; Zeina, Christina M; Gao, Xue; Rees, Holly A; Lin, Zhi; Liu, David R

2018-04-05

A key limitation of the use of the CRISPR-Cas9 system for genome editing and other applications is the requirement that a protospacer adjacent motif (PAM) be present at the target site. For the most commonly used Cas9 from Streptococcus pyogenes (SpCas9), the required PAM sequence is NGG. No natural or engineered Cas9 variants that have been shown to function efficiently in mammalian cells offer a PAM less restrictive than NGG. Here we use phage-assisted continuous evolution to evolve an expanded PAM SpCas9 variant (xCas9) that can recognize a broad range of PAM sequences including NG, GAA and GAT. The PAM compatibility of xCas9 is the broadest reported, to our knowledge, among Cas9 proteins that are active in mammalian cells, and supports applications in human cells including targeted transcriptional activation, nuclease-mediated gene disruption, and cytidine and adenine base editing. Notably, despite its broadened PAM compatibility, xCas9 has much greater DNA specificity than SpCas9, with substantially lower genome-wide off-target activity at all NGG target sites tested, as well as minimal off-target activity when targeting genomic sites with non-NGG PAMs. These findings expand the DNA targeting scope of CRISPR systems and establish that there is no necessary trade-off between Cas9 editing efficiency, PAM compatibility and DNA specificity.

Activation of lysosomal P2X4 by ATP transported into lysosomes via VNUT/SLC17A9 using V‐ATPase generated voltage gradient as the driving force

Science.gov (United States)

Zhong, Xi Zoë; Cao, Qi; Sun, Xue

2016-01-01

Key points SLC17A9 proteins function as a lysosomal ATP transporter responsible for lysosomal ATP accumulation.P2X4 receptors act as lysosomal ion channels activated by luminal ATP.SLC17A9‐mediated ATP transport across the lysosomal membrane is suppressed by Bafilomycin A1, the V‐ATPase inhibitor.SLC17A9 mainly uses voltage gradient but not pH gradient generated by the V‐ATPase as the driving force to transport ATP into the lysosome to activate P2X4. Abstract The lysosome contains abundant ATP which plays important roles in lysosome functions and in cell signalling. Recently, solute carrier family 17 member 9 (SLC17A9, also known as VNUT for vesicular nucleotide transporter) proteins were suggested to function as a lysosomal ATP transporter responsible for lysosomal ATP accumulation, and P2X4 receptors were suggested to be lysosomal ion channels that are activated by luminal ATP. However, the molecular mechanism of SLC17A9 transporting ATP and the regulatory mechanism of lysosomal P2X4 are largely unknown. In this study, we report that SLC17A9‐mediated ATP transport across lysosomal membranes is suppressed by Bafilomycin A1, the V‐ATPase inhibitor. By measuring P2X4 activity, which is indicative of ATP transport across lysosomal membranes, we further demonstrated that SLC17A9 mainly uses voltage gradient but not pH gradient as the driving force to transport ATP into lysosomes. This study provides a molecular mechanism for lysosomal ATP transport mediated by SLC17A9. It also suggests a regulatory mechanism of lysosomal P2X4 by SLC17A9. PMID:27477609

CONCEPTUAL DESIGN AND ECONOMICS OF A NOMINAL 500 MWe SECOND-GENERATION PFB COMBUSTION PLANT

Energy Technology Data Exchange (ETDEWEB)

A. Robertson; H. Goldstein; D. Horazak; R. Newby

2003-09-01

Research has been conducted under United States Department of Energy Contract DE-AC21-86MC21023 to develop a new type of coal-fired plant for electric power generation. This new type of plant, called a Second Generation Pressurized Fluidized Bed Combustion Plant (2nd Gen PFB), offers the promise of efficiencies greater than 48 percent, with both emissions and a cost of electricity that are significantly lower than those of conventional pulverized coal-fired (PC) plants with wet flue gas desulfurization. The 2nd Gen PFB plant incorporates the partial gasification of coal in a carbonizer, the combustion of carbonizer char in a pressurized circulating fluidized bed boiler, and the combustion of carbonizer syngas in a gas turbine combustor to achieve gas turbine inlet temperatures of 2300 F and higher. A conceptual design and an economic analysis was previously prepared for this plant. When operating with a Siemens Westinghouse W501F gas turbine, a 2400psig/1000 F/1000 F/2-1/2 in. Hg. steam turbine, and projected carbonizer, PCFB, and topping combustor performance data, the plant generated 496 MWe of power with an efficiency of 44.9 percent (coal higher heating value basis) and a cost of electricity 22 percent less than a comparable PC plant. The key components of this new type of plant have been successfully tested at the pilot plant stage and their performance has been found to be better than previously assumed. As a result, the referenced conceptual design has been updated herein to reflect more accurate performance predictions together with the use of the more advanced Siemens Westinghouse W501G gas turbine. The use of this advanced gas turbine, together with a conventional 2400 psig/1050 F/1050 F/2-1/2 in. Hg. steam turbine increases the plant efficiency to 48.2 percent and yields a total plant cost of $1,079/KW (January 2002 dollars). The cost of electricity is 40.7 mills/kWh, a value 12 percent less than a comparable PC plant.

J/sub 1c/ fracture toughness transition behavior of HT-9

International Nuclear Information System (INIS)

Huang, F.H.

1984-01-01

Small compact tension specimens of two heats of HT-9 were tested at temperatures ranging from room temperature to -192 0 C. The ductile-brittle transition toughness of HT-9 was evaluated using the J-integral approach. There were two loading rates of 2.1 x 10 -5 m/s and 3.2 x 10 -2 m/s. The ductile-brittle transition temperatures of HT-9 (number 1 heat) tested at 2.1 x 10 -5 m/s and HT-9 (number 2 heat) tested at 3.2 x 10 -2 m/s were found to be -60 and -10 0 C, respectively. Results showed the fracture toughness of the former was not sensitive to loading rate and the lower shelf toughness decreased with temperature to a J/sub 1c/ value of 5 kJ/m 2 at -190 0 C. Furthermore, the values of J/sub 1c/ were valid since the thickness of the test specimens was well above the thickness criterion

Structure of 3 at.% and 9 at.% Si-doped HfO{sub 2} from combined refinement of X-ray and neutron diffraction patterns

Energy Technology Data Exchange (ETDEWEB)

Zhao, Lili [Department of Materials Science and Engineering, North Carolina State University, NC 27695 (United States); School of Information Science and Technology, Northwest University, Xi' an 710127 (China); Hou, Dong; Usher, Tedi-Marie; Iamsasri, Thanakorn; Fancher, Chris M.; Forrester, Jennifer S. [Department of Materials Science and Engineering, North Carolina State University, NC 27695 (United States); Nishida, Toshikazu [Department of Electrical and Computer Engineering, University of Florida, FL 32611 (United States); Moghaddam, Saeed [Department of Mechanical and Aerospace Engineering, University of Florida, FL 32611 (United States); Jones, Jacob L., E-mail: jacobjones@ncsu.edu [Department of Materials Science and Engineering, North Carolina State University, NC 27695 (United States)

2015-10-15

The crystal structure of 3 at.% and 9 at.% Si-doped HfO{sub 2} powder was determined through refinements using X-ray and neutron diffraction patterns. The lattice parameters, atomic positions, dopant occupancy, and the second phase fraction were determined with high precision using a combined full pattern fitting via the Rietveld method. The results show that both 3 at.% and 9 at.% Si-doped HfO{sub 2} powder exhibit the monoclinic crystal structure with P 1 2{sub 1}/c 1 space group. Through the combined refinement, the crystal structure parameters, especially for the positions and occupancies of the lighter atoms, were more precisely determined compared to independent X-ray diffraction refinement. Although the ionic radius of Si{sup 4+} is smaller than Hf{sup 4+}, with increasing Si occupancy, the unit cell volume slightly increases; possible mechanisms for this effect are discussed. Moreover, the refined results provide evidence of the existence of a non-equilibrium phase of Hf{sub x}Si{sub 1−x}O{sub 2}. The second phase (SiO{sub 2}) fraction is determined as 0.17 at.% for 3 at.% Si-doped HfO{sub 2} powders and 1.7 at.% for 9 at.% Si-doped HfO{sub 2} powders. - Highlights: • X-ray and neutron diffraction patterns were used to determine crystal structure. • Results from independent refinements and a combined refinement were compared. • Highly precise structural parameters were obtained by the combined refinement. • Structural data of 3 at.% and 9 at.% Si-doped HfO{sub 2} are provided. • The unit cell volume slightly increases with Si concentration from 3 to 9 at.%.

Structure and dielectric properties of (Ba{sub 0.7}Sr{sub 0.3}){sub 1-x}Na{sub x}(Ti{sub 0.9}Sn{sub 0.1}){sub 1-x}Nb{sub x}O{sub 3} ceramics

Energy Technology Data Exchange (ETDEWEB)

Ghoudi, Hanen; Khirouni, Kamel [Universite de Gabes, Laboratoire de Physique des Materiaux et des Nanomateriaux Appliquee a l' Environnement (La Phy MNE), Faculte des Sciences de Gabes, Gabes (Tunisia); Chkoundali, Souad [Universite de Sfax, Laboratoire des Materiaux Multifonctionnels et Applications (LaMMA), Faculte des Sciences de Sfax (FSS), Sfax (Tunisia); Aydi, Abdelhedi [Universite de Gabes, Laboratoire de Physique des Materiaux et des Nanomateriaux Appliquee a l' Environnement (La Phy MNE), Faculte des Sciences de Gabes, Gabes (Tunisia); Universite de Sfax, Laboratoire des Materiaux Multifonctionnels et Applications (LaMMA), Faculte des Sciences de Sfax (FSS), Sfax (Tunisia)

2017-11-15

(Ba{sub 0.7}Sr{sub 0.3}){sub 1-x}Na{sub x}(Ti{sub 0.9}Sn{sub 0.1}){sub 1-x}Nb{sub x}O{sub 3} ceramics with compositions x = 0.6, 0.7, 0.8 and 0.9 were synthesized using the solid-state reaction method. These ceramics were examined by X-ray diffraction and dielectric measurements over a broad temperature and frequency ranges. X-ray diffraction patterns revealed a single-perovskite phase crystallized in a cubic structure, for x < 0.8, and in tetragonal, for x ≥ 0.8, with Pm3m and P4mm spaces groups, respectively. Two types of behaviors, classical ferroelectric or relaxor, were observed depending on the x composition. It is noted that temperatures T{sub C} (the Curie temperature) or T{sub m} (the temperature of maximum permittivity) rise when x increases and the relaxor character grows more significantly when x composition decreases. To analyze the dielectric relaxation degree of relaxor, various models were considered. It was proven that an exponential function could well describe the temperature dependence of the static dielectric constant and relaxation time. (orig.)

Study of "9"9"mTc-DMSA biodistribution in experimental animals

International Nuclear Information System (INIS)

Castro, Thais O.M. de; Silva, Natanael G. da; Colturato, Maria T.; Felgueiras, Carlos F.; Mengatti, Jair; Fukumori, Neuza T.O.; Matsuda, Margareth M.N.; Araújo, Elaine B. de

2017-01-01

"9"9"mTc-DMSA, succimer ("9"9"mTc), is a radiopharmaceutical commonly used in nuclear medicine for renal function evaluation by imaging. In order to achieve adequate labeling of the product with good radiochemical yield and standardized biological distribution, the interval of 185 - 3700 MBq should be kept in a maximum volume of 3 mL for product labeling. Moreover, one should avoid exposing the reconstituted solution to oxygen and using the product after four hours post labeling. The aim of the study was to quantify and evaluate the influence of different DMSA complexes on biological distribution of the radiopharmaceutical in experimental animals, taking in account variations in the labeling parameters. Radiochemical purity was determined by paper and thin layer chromatography using both acetone/Whatman 3MM, 0.9% NaCl/TLC-SG and n-propanol/ H_2O/acetic acid (4:3:1 V/V/V)/TLC-SG systems respectively for quantification of "9"9"mTcO_4 - and "9"9"mTcO_2 plus some "9"9"mTc-DMSA complexes. The labeling activity did not significantly affect the extent of the main complex generation. The presence of oxygen and the concentration of "9"9Tc did not markedly change the percentage of the radiochemical impurities in the preparation. Radiochemical purity tests of the DMSA-"9"9"mTc based on IPEN-CNEN DMSA-TEC reagent and on another producer's reagent showed similar results. Although the routine method used by IPEN-CNEN to determine the radiochemical yield of "9"9"mTc-DMSA was not able to discriminate among "9"9"mTc-DMSA complexes, the renal uptake and the kidney to liver plus spleen uptake ratio in rats met the official compendia criteria for the radiopharmaceutical. (author)

Molten salt combustion of radioactive wastes

International Nuclear Information System (INIS)

Grantham, L.F.; McKenzie, D.E.; Richards, W.L.; Oldenkamp, R.D.

1976-01-01

The Atomics International Molten Salt Combustion Process reduces the weight and volume of combustible β-γ contaminated transuranic waste by utilizing air in a molten salt medium to combust organic materials, to trap particulates, and to react chemically with any acidic gases produced during combustion. Typically, incomplete combustion products such as hydrocarbons and carbon monoxide are below detection limits (i.e., 3 ) is directly related to the sodium chloride vapor pressure of the melt; >80% of the particulate is sodium chloride. Essentially all metal oxides (combustion ash) are retained in the melt, e.g., >99.9% of the plutonium, >99.6% of the europium, and >99.9% of the ruthenium are retained in the melt. Both bench-scale radioactive and pilot scale (50 kg/hr) nonradioactive combustion tests have been completed with essentially the same results. Design of three combustors for industrial applications are underway

The Siemens graduate program

International Nuclear Information System (INIS)

Schaeffler, I.

2000-01-01

Siemens is an international company acting in different domains: power generation, communication and information, traffic, health, etc. To be more flexible and active in a world in constant evolution, the company proposes a graduate program where young people with a special background have the possibility to start an international career in all the domains of activity. This graduate program is especially important in the domain of nuclear energy, where the know-how transfer between the previous generation and the new one is a constant point of interest. This article presents the conditions to be accepted in this graduate program, and the supplementary training supporting this program. The Siemens graduate program (Sg) proposes a global concept with a main emphasis being international. (authors)

Combustible structural composites and methods of forming combustible structural composites

Science.gov (United States)

Daniels, Michael A.; Heaps, Ronald J.; Steffler, Eric D.; Swank, W. David

2013-04-02

Combustible structural composites and methods of forming same are disclosed. In an embodiment, a combustible structural composite includes combustible material comprising a fuel metal and a metal oxide. The fuel metal is present in the combustible material at a weight ratio from 1:9 to 1:1 of the fuel metal to the metal oxide. The fuel metal and the metal oxide are capable of exothermically reacting upon application of energy at or above a threshold value to support self-sustaining combustion of the combustible material within the combustible structural composite. Structural-reinforcing fibers are present in the composite at a weight ratio from 1:20 to 10:1 of the structural-reinforcing fibers to the combustible material. Other embodiments and aspects are disclosed.

Cross-calibration of the Siemens mMR

DEFF Research Database (Denmark)

Keller, Sune H; Jakoby, Björn; Svalling, Susanne

2016-01-01

BACKGROUND: We present a quick and easy method to perform quantitatively accurate PET scans of typical water-filled PET plastic shell phantoms on the Siemens Biograph mMR PET/MR system. We perform regular cross-calibrations (Xcal) of our PET systems, including the PET/MR, using a Siemens mCT water...

Magnetic and Moessbauer study of Mg{sub 0.9}Mn{sub 0.1}Cr{sub x}Fe{sub 2-x}O{sub 4} ferrites

Energy Technology Data Exchange (ETDEWEB)

Elzain, M., E-mail: elzain@squ.edu.om; Widatallah, H.; Gismelseed, A.; Bouziane, K.; Yousif, A.; Al Rawas, A.; Al-Omari, I.; Sellai, A. [Sultan Qaboos University, Department of Physics, College of Science (Oman)

2006-02-15

The ferrites Mg{sub 0.9}Mn{sub 0.1}Cr{sub x}Fe{sub 2-x}O{sub 4} (0x0.9) were prepared using the conventional double sintering method. The XRD showed that the samples maintain a single spinel cubic phase. The Moessbauer measurements were carried out at room and liquid nitrogen temperatures. From the area ratios of the A and B sites, it was found that the Fe cation population of the A and B sites decreases in proportion to Cr concentration. The contact hyperfine fields at the A and B sites were found to decrease with increasing Cr contents. This was found to be in approximate agreement with the results of magnetization measurement. The distributions of Mg and Mn cations versus Cr concentration were also determined using the Moessbauer and magnetization results. The Curie temperatures were determined and found to agree with the reported values. As the Cr contents increases the relative magnetization, was found to increase at low temperatures and decreases at higher temperatures.

Thermodynamic properties of 9-fluorenone: Mutual validation of experimental and computational results

International Nuclear Information System (INIS)

Chirico, Robert D.; Kazakov, Andrei F.; Steele, William V.

2012-01-01

Highlights: ► Heat capacities were measured for the temperature range 5 K to 520 K. ► Vapor pressures were measured for the temperature range 368 K to 668 K. ► The enthalpy of combustion was measured and the enthalpy of formation was derived. ► Calculated and derived properties for the ideal gas are in excellent accord. ► Thermodynamic consistency analysis revealed anomalous literature data. - Abstract: Measurements leading to the calculation of thermodynamic properties for 9-fluorenone (IUPAC name 9H-fluoren-9-one and Chemical Abstracts registry number [486-25-9]) in the ideal-gas state are reported. Experimental methods were adiabatic heat-capacity calorimetry, inclined-piston manometry, comparative ebulliometry, and combustion calorimetry. Critical properties were estimated. Molar entropies for the ideal-gas state were derived from the experimental studies at selected temperatures T between T = 298.15 K and T = 600 K, and independent statistical calculations were performed based on molecular geometry optimization and vibrational frequencies calculated at the B3LYP/6 − 31 + G(d,p) level of theory. Values derived with the independent methods are shown to be in excellent accord with a scaling factor of 0.975 applied to the calculated frequencies. This same scaling factor was successfully applied in the analysis of results for other polycyclic molecules, as described in recent articles by this research group. All experimental results are compared with property values reported in the literature. Thermodynamic consistency between properties is used to show that several studies in the literature are erroneous.

Synthesis and electrical characterization of BaZr0.9Ho0.1O3-δ electrolyte ceramic for IT - SOFCs

Science.gov (United States)

Saini, Deepash S.; Singh, Lalit K.; Bhattacharya, D.

2018-04-01

A cost-effective modified combustion method using citric acid and glycine has recently been developed to synthesize high quality, and nanosized BaZr0.9Ho0.1O3 ceramic powder. BaZr0.9Ho0.1O3-δ ceramic powder was characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and field emission scanning electron microscopy (FESEM). XRD pattern of BaZr0.9Ho0.1O3-δ ceramic sintered at 1600 °C has shown that pure phase of BaZr0.9Ho0.1O3-δ with cubic Pm3¯m space group symmetry. The transmission electron microscopic investigation has shown that the particle size of the powder calcined at 1100 °C was in the range 30-80 nm. The FESEM image of sintered pellet at 1600 °C for 4 h reveals porous nature of BaZr0.9Ho0.1O3-δ with 83.7 relative density. Impedance analysis reveal three type relaxations in the temperature range 250 °C to 500 °C as studied at different frequencies over 100 Hz to 1 MHz in air. The grain boundary conductivity of BaZr0.9Ho0.1O3-δ ceramic is found lower then grain (bulk) conductivity due to core-space charge layer behavior in grain boundary.

Type IX secretion system PorM and gliding machinery GldM form arches spanning the periplasmic space

OpenAIRE

Leone, Philippe; Roche, Jennifer; Vincent, Maxence S.; Tran, Quang Hieu; Desmyter, Aline; Cascales, Eric; Kellenberger, Christine; Cambillau, Christian; Roussel, Alain

2018-01-01

Type IX secretion system (T9SS), exclusively present in the Bacteroidetes phylum, has been studied mainly in Flavobacterium johnsoniae and Porphyromonas gingivalis. Among the 18 genes, essential for T9SS function, a group of four, porK-N (P. gingivalis) or gldK-N (F. johnsoniae) belongs to a co-transcribed operon that expresses the T9SS core membrane complex. The central component of this complex, PorM (or GldM), is anchored in the inner membrane by a trans-membrane helix and interacts throug...

Microstructure and elevated-temperature erosion-oxidation behaviour of aluminized 9Cr-1Mo Steel

OpenAIRE

Huttunen, E.; Honkanen, M.; Tsipas, Sophia Alexandra; Omar, H.; Tsipas, D.

2012-01-01

Degradation of materials by a combination of erosive wear and atmospheric oxidation at elevated temperatures constitutes a problem in some power generation processes, such as fluidized-bed combustion. In this work, 9Cr-1Mo steel, a common tube material in combustion chambers, is coated by a pack cementation method from an Al-containing pack in order to improve the resistance to erosion-oxidation at elevated temperatures. The resulting coating is studied in terms of microstructure and microhar...

Background Acoustics Levels in the 9x15 Wind Tunnel and Linear Array Testing

Science.gov (United States)

Stephens, David

2011-01-01

The background noise level in the 9x15 foot wind tunnel at NASA Glenn has been documented, and the results compare favorably with historical measurements. A study of recessed microphone mounting techniques was also conducted, and a recessed cavity with a micronic wire mesh screen reduces hydrodynamic noise by around 10 dB. A three-microphone signal processing technique can provide additional benefit, rejecting up to 15 dB of noise contamination at some frequencies. The screen and cavity system offers considerable benefit to test efficiency, although there are additional calibration requirements.

Microwave-induced combustion synthesis and electrical conductivity of Ce1-xGd xO2-1/2x ceramics

International Nuclear Information System (INIS)

Fu, Y.-P.; Chang, Y.-S.; Wen, S.-B.

2006-01-01

Ce 1-x Gd x O 2-1/2x nanopowder were successfully synthesized by microwave-induced combustion process. For the preparation, cerium nitrate, gadolinium nitrate hexahydrate, and urea were used for the microwave-induced combustion process. The process took only 30 min to obtain Ce 1-x Gd x O 2-1/2x powders. The exo-endo temperature, phase identification, and morphology of resultant powders were investigated by TG/DTA, XRD, and SEM. The as-received Ce 1-x Gd x O 2-1/2x powders showed that the average particle size ranged from 18 to 50 nm, crystallite dimension varied from 11 to 20 nm, and the specific surface area was distribution from 16 to 46 m 2 /g. As for Ce 1-x Gd x O 2-1/2x ceramics sintered at 1450 deg. C for 3 h, the bulk density of Ce 1-x Gd x O 2-1/2x ceramics were over 91% of the theoretical density, the maximum electrical conductivity, σ 700deg.C = 0.017 S/cm with minimum activation energy, E a = 0.869 eV was found at Ce 0.80 Gd 0.20 O 1.90 ceramic

Comparison of theoretically predicted and observed Solar Maximum Mission X-ray spectra for the 1980 April 13 and May 9 flares

International Nuclear Information System (INIS)

Smith, D.F.; Orwig, L.E.

1982-01-01

A method for predicting the hard X-ray spectrum in the 10--100 keV range for compact flares during their initial rise is developed on the basis of a thermal model. Observations of the flares of 1980 April 13, 4:05 U.T., and 1980 May 9, 7:12 U.T. are given and their combined spectra from the Hard X-ray Burst Spectrometer and Hard X-ray Imaging Spectrometer on the Solar Maximum Mission are deduced. Constraints on the cross sectional area of the supposed emitting arch are obtained from data from the Hard X-ray Imaging Spectrometer. A power-law spectrum is predicted for the rise of the flare of April 13 for initial arch densities less than 10 10 cm -3 and also for the flare of May 9 for initial arch densities less than 5.4 x 10 10 cm -3 . In both cases power-law spectra are observed. Limitations and implications of these results are discussed

Postirradiation notch ductility tests of ESR alloy HT-9 and modified 9Cr-1Mo alloy from UBR reactor experiments

International Nuclear Information System (INIS)

Hawthorne, J.R.

1984-01-01

During this period, irradiation exposures at 300 0 C and 150 0 C to approx. 8 x 10 19 n/cm 2 , E > 0.1 MeV, were completed for the Alloy HT-9 plate and the modified Alloy 9Cr-1Mo plates, respectively. Postirradiation tests of Charpy-V (C/sub v/) specimens were completed for both alloys; other specimen types included in the reactor assemblies were fatigue precracked Charpy-V (PCC/sub v/), half-size Charpy-V, and in the case of the modified 9Cr-1Mo, 2.54 mm thick compact tension specimens

Performance of HT9 clad metallic fuel at high temperature

International Nuclear Information System (INIS)

Pahl, R.G.; Lahm, C.E.; Hayes, S.L.

1992-01-01

Steady-state testing of HT9 clad metallic fuel at high temperatures was initiated in EBR-II in November of 1987. At that time U-10 wt. % Zr fuel clad with the low-swelling ferritic/martensitic alloy HT9 was being considered as driver fuel options for both EBR-II and FFTF. The objective of the X447 test described here was to determine the lifetime of HT9 cladding when operated with metallic fuel at beginning of life inside wall temperatures approaching ∼660 degree C. Though stress-temperature design limits for HT9 preclude its use for high burnup applications under these conditions due to excessive thermal creep, the X447 test was carried out to obtain data on high temperature breach phenomena involving metallic fuel since little data existed in that area

Crystallization and preliminary X-ray analysis of the C-terminal fragment of PorM, a subunit of the Porphyromonas gingivalis type IX secretion system.

Science.gov (United States)

Stathopulos, Julien; Cambillau, Christian; Cascales, Eric; Roussel, Alain; Leone, Philippe

2015-01-01

PorM is a membrane protein involved in the assembly of the type IX secretion system (T9SS) from Porphyromonas gingivalis, a major bacterial pathogen responsible for periodontal disease in humans. The periplasmic domain of PorM was overexpressed in Escherichia coli and purified. A fragment of the purified protein was obtained by limited proteolysis. Crystals of this fragment belonged to the tetragonal space group P4(3)2(1)2. Native and MAD data sets were recorded to 2.85 and 3.1 Å resolution, respectively, using synchrotron radiation.

Magnetic transitions in double perovskite Sr2FeRe1-xSbxO6 (0≤x≤0.9)

International Nuclear Information System (INIS)

Jung, Alexandra; Ksenofontov, Vadim; Reiman, Sergey; Therese, Helen Annal; Felser, Claudia; Tremel, Wolfgang; Kolb, Ute

2006-01-01

The double perovskites Sr 2 FeMO 6 (M=Re,Mo) belong to the important class of half-metallic magnetic materials. In this study we explore the effect of replacing the electronic 5d buffer element Re with variable valency by the main group element Sb with fixed valency. X-ray diffraction reveals Sr 2 FeRe 1-x Sb x O 6 (0 2 FeReO 6 changes to antiferromagnetic upon Sb substitution as was determined by magnetic susceptibility measurements. Samples up to a doping level of 0.3 are ferrimagnetic, while Sb contents higher than 0.6 result in an overall antiferromagnetic behavior. 57 Fe and 121 Sb Moessbauer spectroscopy specifies the valence state of Sb to be +5 within the whole range of substitution whereas the Fe valence state changes from +2.7 for the parent compound to +2.9 for Sr 2 FeRe 0.1 Sb 0.9 O 6 . Accordingly, Fe adopts the role of an electronic buffer element from Re upon heavy Sb doping. Additionally, 57 Fe Moessbauer results show a coexistence of ferri- and antiferromagnetic clusters within the same perovskite-type crystal structure in the Sb substitution range 0.3 2 FeReO 6 and Sr 2 FeRe 0.9 Sb 0.1 O 6 are ''purely'' ferrimagnetic and Sr 2 FeRe 0.1 Sb 0.9 O 6 contains antiferromagnetically ordered Fe sites only. Consequently, a replacement of the Re atoms by a nonmagnetic main group element such as Sb blocks the superexchange pathways -Fe-O-Re(Sb)-O-Fe- along the crystallographic axis of the perovskite unit cell and destroys the itinerant magnetism of the parent compound

Influence of Cd-content on structural and optical dispersion characteristics of nanocrystalline Zn1−xCdxS (0 ⩽ x ⩽ 0.9) films

International Nuclear Information System (INIS)

Farag, A.A.M.; Abdel Rafea, M.; Roushdy, N.; El-Shazly, O.; El-Wahidy, E.F.

2015-01-01

Highlights: • Highly uniform and good adhesion of nanocrystalline Zn 1−x Cd x S films were synthesized. • Small magnitude of optical electronegativity was calculated. • Third-order nonlinear optical susceptibility and molar polarizability were considered. - Abstract: Low cost dip coating technique was successfully used to deposit highly uniform and good adhesive nanocrystalline Zn 1−x Cd x S (0 ⩽ x ⩽ 0.9) thin films. The surface morphology and crystalline structural characteristics of Zn 1−x Cd x S were achieved by using atomic force microscopy (AFM) and transmission electron microscopy (TEM), respectively. Transmission spectra show red shifting of absorption edge as the Cd content increased. The optical constants were accurately determined by using reflectance and transmittance spectra. The effect of Cd-content on refractive index, extinction index and other optical dispersion parameters were also investigated. The dispersion of the refractive index was discussed in terms of single oscillator model. In addition, the ratio of free carrier concentration to its effective mass was estimated. The calculated value of oscillator energy E o obeys the empirical relation (E o ≈ 2 E g ), obtained from single oscillator model. Small magnitude of optical electronegativity (χ ∗ ) for Zn 1−x Cd x S (0 ⩽ x ⩽ 0.9) thin films and relatively high refractive index can be attributed to covalent nature, in agreement with β value, obtained from dispersion energy analysis. Moreover, molar polarizability and third-order nonlinear optical susceptibility were also considered

Re-measurement of the half-life of sup 7 sup 9 Se

CERN Document Server

Jiang Song Sheng; Diao Li Jun; Li Chun Shen; GouJingRu; Wu Shao Yon

2002-01-01

A new attempt has been made for the re-measurement of the half-life of sup 7 sup 9 Se. We made two major improvements over our earlier sup 7 sup 9 Se half-life determination (Nucl. Instr. and Meth. B 123 (1997) 403). Firstly, the half-life of sup 7 sup 9 Se was measured relative to the precisely known half-life of sup 7 sup 5 Se, rather than an absolute measurement of sup 7 sup 9 Se/Se. Secondly, the Projectile X-ray Detection technique was used for the separation of sup 7 sup 9 Se from its isobar, sup 7 sup 9 Br, rather than measuring sup 8 sup 1 Br for the deduction of sup 7 sup 9 Br interference, and this technique was also used for separation of sup 7 sup 5 Se and its isobar, sup 7 sup 5 As. A detailed description of the sample preparations, experimental setup and measurements are given. The re-measured half-life of sup 7 sup 9 Se was (2.95+-0.38)x10 sup 5 a, about a factor of 3 lower than the previous value, 1.1x10 sup 6 a. The problems in the previous measurement are discussed.

Quantification and reduction of peripheral dose from leakage radiation on Siemens Primus accelerators in electron therapy mode.

Science.gov (United States)

Yeboah, Collins; Karotki, Alex; Hunt, Dylan; Holly, Rick

2010-06-15

In this work, leakage radiation from EA200 series electron applicators on Siemens Primus accelerators is quantified, and its penetration ability in water and/or the shielding material Xenolite-NL established. Initially, measurement of leakage from 10 x 10 - 25 x 25 cm2 applicators was performed as a function of height along applicator and of lateral distance from applicator body. Relative to central-axis ionization maximum in solid water, the maximum leakage in air observed with a cylindrical ion chamber with 1 cm solid water buildup cap at a lateral distance of 2 cm from the front and right sidewalls of applicators were 17% and 14%, respectively; these maxima were recorded for 18 MeV electron beams and applicator sizes of >or=20 x 20 cm2. In the patient plane, the applicator leakage gave rise to a broad peripheral dose off-axis distance peak that shifted closer to the field edge as the electron energy increases. The maximum peripheral dose from normally incident primary electron beams at a depth of 1 cm in a water phantom was observed to be equal to 5% of the central-axis dose maximum and as high as 9% for obliquely incident beams with angles of obliquity dose curves showed that the "practical range" of the leakage electrons in water varies from approximately 1.4 to 5.7 cm as the primary electron beam energy is raised from 6 to 18 MeV. Next, transmission measurements of leakage radiation through the shielding material Xenolite-NL showed a 4 mm thick sheet of this material is required to attenuate the leakage from 9 MeV beams by two-thirds, and that for every additional 3 MeV increase in the primary electron beam energy, an additional Xenolite-NL thickness of roughly 2 mm is needed to achieve the aforementioned attenuation level. Finally, attachment of a 1 mm thick sheet of lead to the outer surface of applicator sidewalls resulted in a reduction of the peripheral dose by up to 80% and 74% for 9 and 18MeV beams, respectively. This sidewall modification had an

In memoriam 2003

Index Scriptorium Estoniae

2004-01-01

Maailmas: Lynn Chadwick (24. XI 1914-25. IV), Eila Hiltunen (22. XI 1922-10. X), Leni Riefenstahl (22. VIII 1902-8. IX); Eesti: Paul Allik (23. XII 1946-14. XII), Tiiu Aru (14. X 1938-4. XII), Olga Bruns (19. III 1929-21. XII), Paula Delacherie-Ilves (7. IV 1903-2. IX), Tamara Ditman (9. VIII 1945-4. VIII), Ole Ehelaid (1. V 1913-2. IX), Mart-Ivo Eller (24. VII 1936-18. XI), Ene Falkenberg (2. XI 1914-10. III), Valve Janov (31. I 1921-18. IX), Aino Järvesoo (23. IX 1910-2. II), Lea Jürisson (31. X 1927-30. VIII), Ella Külv (1. XI 1921-31. VII), Tõnis Liik (1. XI 1923-25. I), Ella Loodma (27. II 1926-9. VI), Külli Muna (17. I 1960-8. I), Maire Männik (1. IV 1922-5. IX), Aleksei Paivel (30. III 1929-15. IX), Aino Põldra (1. VIII 1923-5. III), Made Põlluaas (13. VI 1929-15. X), Aleksander Suuman (25. IV 1927-19. VI), Walter Zapp (4. IX 1905-17. VII), Andres Tambek (7. VII 1952-12. V), Isi Trapido (27. IX 1921-28. XI), Ants Erik Vomm (4. VI 1931-11. VIII)

??????????? ??????? ????????? ???????????? ?? ??????, ?? ??????? ????? ??????? ?9 ?????? ????????? ???????? ?????????? ??????

OpenAIRE

????????, ?????; ?????????, ?????

2011-01-01

?????????? ????????? ???????????? ?? ??????, ??? ??????? ????? ??????? ?9 ?????? ????????? ???????? ?????????? ??????. ???????????????? ????????? ??????? ????????: ?????????,????????????,?????????-???????????? ?? ??????????? ???? ???????????-????????????. ????????? ?????? ?? ??????????? ?????????,????????? ??????? ????????. ????????? ???????????? ?????? ????? ??????? ?? ?????? ????????? ??????????? ?? ???????? ?????????? ????????.

Type IX secretion: the generation of bacterial cell surface coatings involved in virulence, gliding motility and the degradation of complex biopolymers.

Science.gov (United States)

Veith, Paul D; Glew, Michelle D; Gorasia, Dhana G; Reynolds, Eric C

2017-10-01

The Type IX secretion system (T9SS) is present in over 1000 sequenced species/strains of the Fibrobacteres-Chlorobi-Bacteroidetes superphylum. Proteins secreted by the T9SS have an N-terminal signal peptide for translocation across the inner membrane via the SEC translocon and a C-terminal signal for secretion across the outer membrane via the T9SS. Nineteen protein components of the T9SS have been identified including three, SigP, PorX and PorY that are involved in regulation. The inner membrane proteins PorL and PorM and the outer membrane proteins PorK and PorN interact and a complex comprising PorK and PorN forms a large ring structure of 50 nm in diameter. PorU, PorV, PorQ and PorZ form an attachment complex on the cell surface of the oral pathogen, Porphyromonas gingivalis. P. gingivalis T9SS substrates bind to PorV suggesting that after translocation PorV functions as a shuttle protein to deliver T9SS substrates to the attachment complex. The PorU component of the attachment complex is a novel Gram negative sortase which catalyses the cleavage of the C-terminal signal and conjugation of the protein substrates to lipopolysaccharide, anchoring them to the cell surface. This review presents an overview of the T9SS focusing on the function of T9SS substrates and machinery components. © 2017 John Wiley & Sons Ltd.

17 CFR 210.9-01 - Application of §§ 210.9-01 to 210.9-07

Science.gov (United States)

2010-04-01

... COMMISSION FORM AND CONTENT OF AND REQUIREMENTS FOR FINANCIAL STATEMENTS, SECURITIES ACT OF 1933, SECURITIES....9-01 Application of §§ 210.9-01 to 210.9-07 This article is applicable to consolidated financial statements filed for bank holding companies and to any financial statements of banks that are included in...

Electrochemical Synthesis, Structure Elucidation and Antibacterial Evaluation of 9a-aza-9a-chloro-9a-homoerythromycin A

Directory of Open Access Journals (Sweden)

Zoran Mandic

2014-09-01

Full Text Available Electrochemical synthesis, structure elucidation and antibacterial evaluation of 9a-aza-9a-chloro-9a-homoerythromycin A were carried out. It was found that the anodic oxidation of 9a-aza-9a-homoerythromycin A via electrogenerated reactive chlorine species leads to the chlorination of lactam nitrogen in high yield provided the pH of the reaction mixture is maintained above 3. NOESY spectra reveal the existence of the mixture of two conformational families in the solution, the "folding-out" conformer being slightly more abundant comparing to 9a-Aza-9a-homoerythromycin A. The chlorine substitution of lactam hydrogen resulted in improved antimicrobial potency against Sreptococcus pyogenes PSCB0542, Moraxella catarrhalis ATCC 25238, Haemophilus  influenzae ATCC 49247 and Enteroccocus faecalis ATCC 29212.

Enhanced multiferroic properties in scandium doped Bi2Fe4O9

International Nuclear Information System (INIS)

Dutta, Dimple P.; Tyagi, A. K.

2013-01-01

Undoped and Sc 3+ doped Bi 2 Fe 4 O 9 nanoparticles have been synthesized using sonochemical method. The phase purity of the samples was checked using powder X-rau diffraction technique. EDS analysis was done to confirm the extent of Sc 3+ doping in the samples. The size and morphology of the nanoparticles have been analyzed using transmission electron microscopy (TEM). The Bi 2 Fe 4 O 9 nanoparticles show a weak ferromagnetic behavior at room temperature, which is quite different from the linear M–H relationship reported for bulk Bi 2 Fe 4 O 9 . This is mainly attributed to the uncompensated moments at the disordered particle surface resulting from the reduced coordination of the surface spins, arising due to lattice strain or oxygen deficiency. Addition of Sc 3+ dopant in varying concentrations in these Bi 2 Fe 4 O 9 nanoparticles, improves their magnetic as well as ferroelectric properties. The leakage current is considerably reduced and electric polarization increases significantly in case of Bi 2 Fe 4(1-x) Sc x O 9 (x = 0.1) nanoparticles. Hence it can be inferred that Sc 3+ doped Bi 2 Fe 4 O 9 nanoparticles shows promise as good multiferroic materials.

Microstructure and mechanical properties of Sn-9Zn-xAl2O3 nanoparticles (x=0–1) lead-free solder alloy: First-principles calculation and experimental research

International Nuclear Information System (INIS)

Xing, Wen-qing; Yu, Xin-ye; Li, Heng; Ma, Le; Zuo, Wei; Dong, Peng; Wang, Wen-xian; Ding, Min

2016-01-01

This paper studies microstructure and mechanical properties of Sn-9Zn-x Al 2 O 3 nanoparticles (x=0–1) lead-free solder alloy. The interface structure, interface energy and electronic properties of Al 2 O 3 /Sn9Zn interface are investigated by first-principle calculation. On the experimental part, in comparison with the plain Sn-9Zn solder, the Al 2 O 3 nanoparticles incorporated into the solder matrix can inhibit the growth of coarse dendrite Sn-Zn eutectic structure and refine grains of the composite solders during the solidification process of the alloys. Moreover, the microhardness and average tensile strength of the solders with addition of Al 2 O 3 nanoparticles increased with the increasing weight percentages of Al 2 O 3 nanoparticles. These improved mechanical properties can be attributed to the microstructure developments and the dispersed Al 2 O 3 nanoparticles.

Dual-channel red/blue fluorescence dosimetry with broadband reflectance spectroscopic correction measures protoporphyrin IX production during photodynamic therapy of actinic keratosis

Science.gov (United States)

Kanick, Stephen Chad; Davis, Scott C.; Zhao, Yan; Hasan, Tayyaba; Maytin, Edward V.; Pogue, Brian W.; Chapman, M. Shane

2014-07-01

Dosimetry for aminolevulinic acid (ALA)-induced protoporphyrin IX (PpIX) photodynamic therapy of actinic keratosis was examined with an optimized fluorescence dosimeter to measure PpIX during treatment. While insufficient PpIX generation may be an indicator of incomplete response, there exists no standardized method to quantitate PpIX production at depths in the skin during clinical treatments. In this study, a spectrometer-based point probe dosimeter system was used to sample PpIX fluorescence from superficial (blue wavelength excitation) and deeper (red wavelength excitation) tissue layers. Broadband white light spectroscopy (WLS) was used to monitor aspects of vascular physiology and inform a correction of fluorescence for the background optical properties. Measurements in tissue phantoms showed accurate recovery of blood volume fraction and reduced scattering coefficient from WLS, and a linear response of PpIX fluorescence versus concentration down to 1.95 and 250 nM for blue and red excitations, respectively. A pilot clinical study of 19 patients receiving 1-h ALA incubation before treatment showed high intrinsic variance in PpIX fluorescence with a standard deviation/mean ratio of >0.9. PpIX fluorescence was significantly higher in patients reporting higher pain levels on a visual analog scale. These pilot data suggest that patient-specific PpIX quantitation may predict outcome response.

DFT and experimental studies on structure and spectroscopic parameters of 3,6-diiodo-9-ethyl-9H-carbazole

DEFF Research Database (Denmark)

Radula-Janik, Klaudia; Kupka, Teobald; Ejsmont, Krzysztof

2016-01-01

The first report on crystal and molecular structure of 3,6-diiodo-9-ethyl-9H-carbazole is presented. Experimental room-temperature X-ray and 13C chemical shift studies were supported by advanced theoretical calculations using density functional theory (DFT). The 13C nuclear magnetic shieldings were...... predicted at the non-relativistic and relativistic level of theory using the zeroth-order regular approximation (ZORA). Theoretical relativistic calculations of chemical shifts of carbons C3 and C6, directly bonded to iodine atoms, produced a reasonable agreement with experiment (initial deviation from...

Synthesis of Won-WX2 (n=2.7, 2.9; X=S, Se) Heterostructures for Highly Efficient Green Quantum Dot Light-Emitting Diodes

KAUST Repository

Han, Shikui; Yang, Xuyong; Zhu, Yihan; Tan, Chaoliang; Zhang, Xiao; Chen, Junze; Huang, Ying; Chen, Bo; Luo, Zhimin; Ma, Qinglang; Sindoro, Melinda; Zhang, Hao; Qi, Xiaoying; Li, Hai; Huang, Xiao; Huang, Wei; Sun, Xiao Wei; Han, Yu; Zhang, Hua

2017-01-01

.7, 2.9; X=S, Se) heterostructures by sulfurization or selenization of WOn nanomaterials. The WOn -WX2 heterostructures are composed of WO2.9 nanoparticles (NPs) or WO2.7 nanowires (NWs) grown together with single- or few-layer WX2 nanosheets (NSs). As a

Influence of synthesis route and composition on electrical properties of La{sub 9.33+x}Si{sub 6}O{sub 26+3x/2} oxy-apatite compounds

Energy Technology Data Exchange (ETDEWEB)

Chesnaud, A.; Dezanneau, G.; Bogicevic, C.; Karolak, F.; Geneste, G. [Laboratoire Structure Proprietes et Modelisation des Solides, Ecole Centrale Paris, Grande Voie des Vignes, 92295, Chatenay-Malabry Cedex (France); Estournes, C. [CIRIMAT et Plateforme Nationale de Frittage Flash du CNRS (PNF2-MHT-UPS), Universite Paul-Sabatier, 118 Route de Narbonne, 31062, Toulouse (France); Geiger, S. [Laboratoire Structure Proprietes et Modelisation des Solides, Ecole Centrale Paris, Grande Voie des Vignes, 92295, Chatenay-Malabry Cedex (France)]|[Faculte de Pharmacie, Universite Paris-Sud, 5 Rue J-B Clement, 92296, Chatenay-Malabry (France)

2008-10-15

Oxy-apatite materials La{sub 9.33+x}Si{sub 6}O{sub 26+3x/2} are thought as zirconia-substitutes in Solid Oxide Fuel Cells due to their fast ionic conduction. However, the well-known difficulties related to their densification prevent them from being used as such. This paper presents strategies to obtain oxy-apatite dense materials. First, freeze-drying has been optimized to obtain ultrafine and very homogeneous La{sub 9.33+x}Si{sub 6}O{sub 26+3x/2} (0{<=}x{<=}0.67) nanopowders. From these powders, conventional and Spark Plasma Sintering (SPS) have been used leading to very dense samples obtained at temperatures rather lower than those previously reported. For instance, SPS has allowed to prepare fully dense and transparent ceramics from 1200 C under 100 MPa. The microstructure and transport properties of such samples have been then evaluated as a function of sintering conditions and lanthanum content. It will be show that for lanthanum content higher than 9.60 per unit formula, the parasitic phase La{sub 2}SiO{sub 5} appears leading to a degradation of conduction properties. We also show that grain boundaries and porosity (for conventionally-sintered materials) seem to have blocking effects on oxygen transport. The highest overall conductivity values at 700 C, i.e. {sigma}{sub 700{sub C}} = 7.33.10{sup -3} S cm{sup -1}, were measured for La{sub 9.33}Si{sub 6}O{sub 26} material conventionally-sintered at 1500 C which contains bigger grains' size by comparison with {sigma}{sub 700{sub C}} = 4.77.10{sup -3} S cm{sup -1} for SPS-sintered materials at the same temperature but for few minutes. These values are associated with activation energies close to 0.83-0.91 eV, regardless of sintering condition, which are commonly encountered for anionic conductivity into such materials. (author)

75 FR 27401 - Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-30, DC-9-40, and DC-9-50...

Science.gov (United States)

2010-05-17

... Airworthiness Directives; McDonnell Douglas Corporation Model DC- 9-30, DC-9-40, and DC-9-50 Series Airplanes... airworthiness directive (AD) for certain Model DC-9-30, DC-9-40, and DC-9-50 series airplanes. This AD requires... this AD to detect and correct the potential for an arc/spark condition to occur within the fuel boost...

HREEL study of c(53x9)rect-N structure on Ni(111) surface

International Nuclear Information System (INIS)

Papagno, M.; Pacile, D.; Giallombardo, C.; Cupolillo, A.; Papagno, L.

2005-01-01

In this work we have prepared and characterized by low energy electron diffraction (LEED) and high-resolution electron energy loss spectroscopy (HREELS) the Ni(111)-c(53x9)rect-N surface structure formed by saturating the Ni(111) surface with nitrogen atoms. This structure was obtained by the ion-gauge assisted N 2 exposure method. The loss spectra show features at 50 and 25meV assigned to the N-Ni vibration and to a phonon of the reconstructed surface, respectively. We also investigated the case in which the Ni(111) surface was covered with a low coverage of N atoms

Enhanced magnetic and ferroelectric properties in scandium doped nano Bi2Fe4O9

International Nuclear Information System (INIS)

Dutta, Dimple P.; Sudakar, C.; Mocherla, Pavana S.V.; Mandal, Balaji P.; Jayakumar, Onnatu D.; Tyagi, Avesh K.

2012-01-01

In this study we report the synthesis of undoped and Sc 3+ doped Bi 2 Fe 4 O 9 nanoparticles using sonochemical technique. X-ray diffraction reveals that all samples are single phase with no impurities detected. EDS analysis was done to confirm the extent of Sc 3+ doping in the samples. The size and morphology of the nanoparticles have been analyzed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The Bi 2 Fe 4 O 9 nanoparticles show a weak ferromagnetic behavior at room temperature, which is quite different from the linear M–H relationship reported for bulk Bi 2 Fe 4 O 9 . A magnetization of 0.144 μB/f.u. is obtained at 300 K, which is mainly attributed to the uncompensated moments at the disordered particle surface resulting from the reduced coordination of the surface spins, arising due to lattice strain or oxygen deficiency. Addition of Sc 3+ dopant in varying concentrations in these Bi 2 Fe 4 O 9 nanoparticles, improves their magnetic as well as ferroelectric properties. The leakage current is considerably reduced and electric polarization increases significantly in case of Bi 2 Fe 4(1−x) Sc x O 9 (x = 0.1) nanoparticles. Thus it can be inferred that Sc 3+ doped Bi 2 Fe 4 O 9 nanoparticles shows promise as good multiferroic materials. -- Graphical abstract: Undoped and Sc 3+ doped Bi 2 Fe 4 O 9 nanoparticles have been synthesized using sonochemical technique. The bi-functionalities of Sc 3+ doped Bi 2 Fe 4 O 9 nanoparticles have been demonstrated. The Bi 2 Fe 4(1−x) Sc x O 9 (x = 0.1) nanoparticles showed enhanced magnetic and ferroelectric properties with considerably less lossy characteristics compared to the bulk Bi 2 Fe 4 O 9 . Highlights: ► Phase pure Bi 2 Fe 4 O 9 nanostructures synthesized using a facile sonochemical technique. ► Nanoparticles show a weak ferromagnetic order at room temperature. ► Sc 3+ doping in Bi 2 Fe 4 O 9 nanoparticles alters their magnetic and ferroelectric properties. ► A

Dense plasmas interferometry using an X-UV laser. Development of an X-UV Michelson interferometer at 13.9 nm

International Nuclear Information System (INIS)

Hubert, S.

2001-01-01

After having recalled some aspects related to the physics of plasmas produced by interaction between laser and matter, and related to inertial confinement fusion or ICF (discussion of laser energy absorption, X conversion, parametric and hydrodynamic instabilities, and so on), this research thesis presents various techniques used for plasma diagnosis in order to justify the use of interferometry for the investigation of the electronic density distribution of these plasmas. The physical principle of this diagnosis technique is described and two types of X-UV interferometer are presented, one of them being chosen as more suitable for the study of ICF-type plasmas. The author then describes and reports the experimental investigation performed with a two-mirror Fresnel interferometer and a 21.2 nm zinc X-UV laser: description of the interferometer operation and characteristics, of the specifically designed image system, discussion of plasma interferogram simulations. Then, he reports the development of a Michelson-type X-UV interferometer at 13.9 nm. The operation principle is recalled, and the preliminary modelling phase is reported. The imaging system is presented and results of the interferogram modelling phase are presented [fr

Article 9

DEFF Research Database (Denmark)

Sørensen, Marie Jull

2018-01-01

Bidraget forholdet sig til artikel 9 i et udkast til regulering af digitale formidlingsplatforme.......Bidraget forholdet sig til artikel 9 i et udkast til regulering af digitale formidlingsplatforme....

Validating Westinghouse atom 16 x 16 and 18 x 18 PWR fuel performance

International Nuclear Information System (INIS)

Andersson, S.; Gustafson, J.; Jourdain, P.; Lindstroem, L.; Hallstadius, L.; Hofling, C.G.

2001-01-01

Westinghouse Atom designs and fabricates PWR fuel for all major European fuel types: 17 x 17 standard (12 ft) and 17 x 17 XL (14 ft) for Westinghouse type PWRs, and 16 x 16 and 18 x 18 fuel for Siemens type PWRs. The W Atom PWR fuel designs are based on the extensive Westinghouse CE PWR fuel experience from combustion engineering type PWRs. The W atom designs utilise basic design features from the W CE fuel tradition, such as all-Zircaloy mid grids and the proven ( 6 rod years) Guardian TM debris catcher, which is integrated in the bottom Inconel grid. Several new features have been developed to meet with stringent European requirements originating from requirements on very high burnup, in combination with low-leakage core operating strategies and high coolant temperatures. The overall reliability of the Westinghouse Atom PWR fuel is very high; no fuel failure has been detected since 1997. (orig.)

Effects of boron addition on the formation of MoSi2 by combustion synthesis mode

International Nuclear Information System (INIS)

Feng Peizhong; Wu Jie; Islam, S.H.; Liu Weisheng; Niu Jinan; Wang Xiaohong; Qiang Yinghuai

2010-01-01

The combustion synthesis behavior of Mo-Si-B powder was investigated. Test specimens with nominal compositions including MoSi 2 , Mo(Si 0.975 B 0.025 ) 2 , Mo(Si 0.95 B 0.05 ) 2 , Mo(Si 0.925 B 0.075 ) 2 and Mo(Si 0.9 B 0.1 ) 2 were employed. The combustion mode, propagation velocity of combustion wave, combustion temperature and combustion product structure were studied. The results showed that the combustion wave propagated along a spiral trajectory till reaching the bottom of the compacts. The combustion temperature was increased by the addition of boron, to as high as 1922 K in the case of the Mo(Si 0.95 B 0.05 ) 2 sample. However, the flame-front propagation velocity decreased as a result of the addition of boron. The X-ray diffraction results showed that the combustion products of the Mo(Si 0.975 B 0.025 ) 2 and Mo(Si 0.9 B 0.1 ) 2 samples were composed of MoSi 2 with minor MoB. Those of the Mo(Si 0.95 B 0.05 ) 2 and Mo(Si 0.925 B 0.075 ) 2 samples were composed of MoSi 2 with minor MoB and MoB 2 . And traces of Mo 2 B 5 were identified in the Mo(Si 0.95 B 0.05 ) 2 sample.

Carbonic Anhydrase IX is Not a Predictor of Outcomes in Non-Metastatic Clear Cell Renal Cell Carcinoma - A Digital Analysis of Tissue Microarray

Directory of Open Access Journals (Sweden)

Marcelo Zerati

2013-07-01

Full Text Available Introduction The knowledge about the molecular biology of clear cell renal cell carcinoma (ccRCC is evolving, and Carbonic Anhydrase type IX (CA-IX has emerged as a potential prognostic marker in this challenging disease. However, most of the literature about CA-IX on ccRCC comes from series on metastatic cancer, with a lack of series on non-metastatic cancer. The objective is to evaluate the expression of CA-IX in a cohort of non-metastatic ccRCC, correlating with 1 overall survival, and 2 with established prognostic parameters (T stage, tumor size, Fuhrman nuclear grade, microvascular invasion and peri-renal fat invasion. Materials and Methods This is a retrospective cohort study. We evaluated 95 patients with non-metastatic clear cell renal cell carcinoma, as to the expression of CA-IX. The analyzed parameters where: overall survival (OS, TNM stage, tumor size (TS, Fuhrman nuclear grade (FNG, microvascular invasion (MVI, peri-renal fat invasion (PFI. We utilized a custom built tissue microarray, and the immunoexpression was digitally quantified using the Photoshop® software. Results: Th e mean follow-up time was 7.9 years (range 1.9 to 19.5 years. The analysis of CA-IX expression against the selected prognostic parameters showed no correlation. The results are as follows: Overall survival (p = 0.790; T stage (p = 0.179; tumor size (p = 0.143; grouped Fuhrman nuclear grade (p = 0.598; microvascular invasion (p = 0.685, and peri-renal fat invasion (p = 0.104. Conclusion Carbonic anhydrase type IX expression does not correlate with overall survival and conventional prognostic parameters in non-metastatic clear cell renal cell carcinoma.

Immersion Freezing of Coal Combustion Ash Particles from the Texas Panhandle

Science.gov (United States)

Whiteside, C. L.; Tobo, Y.; Mulamba, O.; Brooks, S. D.; Mirrielees, J.; Hiranuma, N.

2017-12-01

Coal combustion aerosol particles contribute to the concentrations of ice-nucleating particles (INPs) in the atmosphere. Especially, immersion freezing can be considered as one of the most important mechanisms for INP formation in supercooled tropospheric clouds that exist at temperatures between 0°C and -38°C. The U.S. contains more than 550 operating coal-burning plants consuming 7.2 x 108 metric tons of coal (in 2016) to generate a total annual electricity of >2 billion MW-h, resulting in the emission of at least 4.9 x 105 metric tons of PM10 (particulate matter smaller than 10 µm in diameter). In Texas alone, 19 combustion plants generate 0.15 billion MW-h electricity and >2.4 x 104 metric tons of PM10. Here we present the immersion freezing behavior of combustion fly ash and bottom ash particles collected in the Texas Panhandle region. Two types of particulate samples, namely electron microscopy on both ash types will also be presented to relate the crystallographic and chemical properties to their ice nucleation abilities.

Classification of X-ray spectra from laser produced plasmas of atoms from Tm to Pt in the range 6-9A

International Nuclear Information System (INIS)

Mandelbaum, P.; Klapisch, M.; Bar-Shalom, A.; Schwob, J.L.; Zigler, A.

1983-01-01

X-ray spectra of highly ionized tungsten and neighbouring atoms (Tm, Yb, Hf, Ta, W, Re and Pt) has been observed from laser produced plasmas in the lambda = 6-9A range. Beside the prominent lines of the Ni I-like ions, lines belonging to Co I (3d 9 -3d 8 4p), Cu I (3d 10 4s-3d 9 4s4p, 3d 10 4p-3d 9 4p 2 ) and Zn I-like ions (3d 10 4s 2 -3d 9 4s 2 4p, 3d 10 4s4p-3d 9 4s4p 2 ) have been identified. Classification was based on isoelectronic sequence analysis and on comparison with ab-initio relativistic calculations. A collisional-radiative model of the Cu I-like ions in the plasma is used to show that the contribution of the 3d 10 4d-3d 9 4p4d and 3d 10 4f-3d 9 4f4p transition arrays to the 3d-4p spectrum is small. The importance of configuration interaction is pointed out. Computations agree with measurements within experimental uncertainty. (Auth.)

Inhibitor specificity of recombinant and endogenous caspase-9.

Science.gov (United States)

Ryan, Ciara A; Stennicke, Henning R; Nava, Victor E; Burch, Jennifer B; Hardwick, J Marie; Salvesen, Guy S

2002-01-01

Apoptosis triggered through the intrinsic pathway by radiation and anti-neoplastic drugs is initiated by the activation of caspase-9. To elucidate control mechanisms in this pathway we used a range of synthetic and natural reagents. The inhibitory potency of acetyl-Asp-Glu-Val-Asp-aldehyde ('Ac-DEVD-CHO'), benzyloxycarbonyl-Val-Ala-Asp-fluoromethylketone ('Z-VAD-FMK') and the endogenous caspase inhibitor X-chromosome-linked inhibitor of apoptosis protein ('XIAP') against recombinant caspase-9 were predictive of the efficacy of these compounds in a cell-free system. However, the viral proteins CrmA and p35, although potent inhibitors of recombinant caspase-9, had almost no ability to block caspase-9 in this system. These findings were also mirrored in cell expression studies. We hypothesize that the viral inhibitors CrmA and p35 are excluded from reacting productively with the natural form of active caspase-9 in vivo, making the potency of inhibitors highly context-dependent. This is supported by survival data from a mouse model of apoptosis driven by Sindbis virus expressing either p35 or a catalytic mutant of caspase-9. These results consolidate previous findings that CrmA is a potent inhibitor of caspase-9 in vitro, yet fails to block caspase-9-mediated cell death. PMID:12067274

Long-term Stability of 9- to 12 % Cr Steels

DEFF Research Database (Denmark)

Hald, John

2004-01-01

In the recent 25 years creep rupture strength of 9- to 12 %Cr steels for steam pipes and turbines has been doubled by development of new alloys. This development has formed a basis for improved efficiency of fossil fired steam power plants by introduction of advanced steam temperatures...... and pressures. Newly developed steam pipe steels are based on modifications of well-established steels like the X 20CrMoV12 1. Balanced addition of V, Nb and N to a 9Cr 1 Mo steel led to the Modified 9 Cr steel P 91. Addition of 1% W to a 9Cr 1 MoVNbN base composition led to steel E 911 and partial replacement...... of Mo with 1.8 % W combined with a slight amount of Boron led to steel P 92. The creep rupture strength of these new alloys are now secured with long-term tests up to 100,000 hours, which demonstrate improvements of 50% (P 91), 75 % (E 911) and 100 % (P 92) in strength compared to X 20CrMoV12 1....

Influência do teor de Mo na microestrutura de ligas Fe-9Cr-xMo Effect of the content of molybdenum in the microstructure of Fe-9Cr-xMo alloy

Directory of Open Access Journals (Sweden)

Rodrigo Freitas Guimarães

2010-12-01

Full Text Available Aços Cr-Mo são usados na indústria do petróleo em aplicações com óleos crus ricos em compostos sulfurosos. Aços comerciais como 2.5Cr1Mo ou 9Cr1Mo têm se mostrado ineficientes em consequência de altos índices de corrosão naftênica. Uma estratégia para resolver este problema é o aumento do teor de molibdênio destes aços. Neste trabalho foi estudado o efeito do aumento do teor de molibdênio na microestrutura de ligas Fe-9Cr-xMo, solubilizadas e soldadas. Foram levantados os diagramas de fases com auxílio de um programa comercial para verificar as possíveis fases a serem formadas e identificar os problemas de soldagem. A microestrutura das ligas solubilizadas foi analisada por microscopia óptica e EBSD, além da medição da dureza. Foram realizadas soldagens autógenas para verificar o efeito do aporte térmico na microestrutura e na dureza das ligas. O aumento do teor de molibdênio resultou no aumento da dureza das ligas. A análise microestrutural das ligas soldadas apresentou uma particularidade para a liga com menor teor de molibdênio, a presença de martensita. Já as ligas com maior teor de molibdênio apresentaram uma microestrutura completamente ferrítica. A formação de martensita pode ser um problema na solda da liga com menor teor de molibdênio, uma vez que a mesma pode causar perdas nas propriedades mecânicas comprometendo sua aplicação.Cr-Mo steels are used in the petroleum industry in applications with crude oils rich in sulfur compounds. 2.5Cr1Mo or 9Cr1Mo do not resist to operating conditions when in contact with crude oils. The increasing of molybdenum content can improve the corrosion resistance of these alloys. This paper studied the effect of increased concentration of molybdenum in the microstructure of Fe-9Cr-xMo alloys, annealed and welded. Phase diagrams were built with the aid of commercial program to check the possible phases to be formed and to identify the problems of welding. Analyses were

New polymorphic variants of human blood clotting factor IX

Energy Technology Data Exchange (ETDEWEB)

Surin, V.L.; Luk`yanenko, A.V.; Tagiev, A.F.; Smirnova, O.V. [Hematological Research Center, Moscow (Russian Federation); Plutalov, O.V.; Berlin, Yu.A. [Shemyakin Institute of Bioorganic Chemistry, Moscow (Russian Federation)

1995-04-01

The polymorphism of Alu-repeats, which are located in the introns of the human factor IX gene (copies 1-3), was studied. To identify polymorphic variants, direct sequencing of PCR products that contained appropriate repeats was used. In each case, 20 unrelated X chromosomes were studied. A polymorphic Dra I site was found near the 3{prime}-end of Alu copy 3 within the region of the polyA tract. A PCR-based testing system with internal control of restriction hydrolysis was suggested. Testing 81 unrelated X chromosomes revealed that the frequency of the polymorphic Dra I site is 0.23. Taq I polymorphism, which was revealed in Alu copy 4 of factor IX gene in our previous work, was found to be closely linked to Dra I polymorphism. Studies in linkage between different types of polymorphisms of the factor IX gene revealed the presence of a rare polymorphism in intron a that was located within the same minisatellite region as the known polymorphic insertion 50 bp/Dde I. However, the size of the insertion in our case was 26 bp. Only one polymorphic variant was found among over 150 unrelated X chromosomes derived from humans from Moscow and its vicinity. 10 refs., 4 figs., 1 tab.

Spectral analysis of the 4d96s configuration in eight times ionized xenon, Xe IX

International Nuclear Information System (INIS)

Raineri, M.; Gallardo, M.; Reyna Almandos, J.G.

2006-01-01

A capillary light source was used to observe the spectrum of eight times ionized xenon, Xe IX, in the vacuum ultraviolet range, 270-2000 A. Sixteen transitions have been identified as combinations between energy levels of the 4d 9 6s with 4d 9 5p configuration, and all 4d 9 6s levels have been determined. The present analysis is based on an accurate extrapolation of energy parameters and experimental energy level values in the Pd I isoelectronic sequence. The energy parameters were obtained with Hartree-Fock relativistic calculations. Least-squares parametric calculation has been carried out to study the fit between experimental and theoretical values

9 CFR 355.9 - Numbers granted same ownership or control.

Science.gov (United States)

2010-01-01

... INSPECTION AND CERTIFICATION CERTIFIED PRODUCTS FOR DOGS, CATS, AND OTHER CARNIVORA; INSPECTION... 9 Animals and Animal Products 2 2010-01-01 2010-01-01 false Numbers granted same ownership or control. 355.9 Section 355.9 Animals and Animal Products FOOD SAFETY AND INSPECTION SERVICE, DEPARTMENT OF...

Development of a new reduced hydrogen combustion mechanism with NO_x and parametric study of hydrogen HCCI combustion using stochastic reactor model

International Nuclear Information System (INIS)

Maurya, Rakesh Kumar; Akhil, Nekkanti

2017-01-01

Highlights: • PDF based stochastic reactor model used for study of hydrogen HCCI engine. • New reduced hydrogen combustion mechanism with NOx developed (30 species and 253 reactions). • Mechanism predicts cylinder pressure and captures NO_x emission trend with sufficient accuracy. • Parametric study of hydrogen HCCI engine over wide range of speed and load conditions. • Hydrogen HCCI operating range increases with compression ratio & decreases with engine speed. - Abstract: Hydrogen is a potential alternative and renewable fuel for homogenous charge compression ignition (HCCI) engine to achieve higher efficiency and zero emissions of CO, unburned hydrocarbons as well as other greenhouse gases such as CO_2 and CH_4. In this study, a detailed hydrogen oxidation mechanism with NO_x was developed by incorporating additional species and NO_x reactions to the existing hydrogen combustion mechanism (10 species and 40 reactions). The detailed hydrogen combustion mechanism used in this study consists of 39 species and 311 reactions. A reduced mechanism consisting 30 species and 253 reactions was also developed by using directed relation graph (DRG) method from detailed mechanism. Developed mechanisms were validated with experimental data by HCCI engine simulation using stochastic reactor model. Sensitivity analysis was performed to identify the most important reactions in hydrogen combustion and NO_x formation in HCCI engine. Pathway analysis was also performed to analyze the important reaction pathways at different temperatures. Results revealed that H2 + HO2 [=] H + H2O2 and O2 + NNH [=] N2 + HO2 are the most significant reactions in the hydrogen HCCI combustion and NO_x formation respectively. Detailed parametric study of HCCI combustion was conducted using developed chemical kinetic model. Numerical simulations are performed at different engine operating condition by varying engine speed (1000–3000 rpm), intake air temperature (380–460 K), and compression

The Structure of Carbonic Anhydrase IX Is Adapted for Low-pH Catalysis.

Science.gov (United States)

Mahon, Brian P; Bhatt, Avni; Socorro, Lilien; Driscoll, Jenna M; Okoh, Cynthia; Lomelino, Carrie L; Mboge, Mam Y; Kurian, Justin J; Tu, Chingkuang; Agbandje-McKenna, Mavis; Frost, Susan C; McKenna, Robert

2016-08-23

Human carbonic anhydrase IX (hCA IX) expression in many cancers is associated with hypoxic tumors and poor patient outcome. Inhibitors of hCA IX have been used as anticancer agents with some entering Phase I clinical trials. hCA IX is transmembrane protein whose catalytic domain faces the extracellular tumor milieu, which is typically associated with an acidic microenvironment. Here, we show that the catalytic domain of hCA IX (hCA IX-c) exhibits the necessary biochemical and biophysical properties that allow for low pH stability and activity. Furthermore, the unfolding process of hCA IX-c appears to be reversible, and its catalytic efficiency is thought to be correlated directly with its stability between pH 3.0 and 8.0 but not above pH 8.0. To rationalize this, we determined the X-ray crystal structure of hCA IX-c to 1.6 Å resolution. Insights from this study suggest an understanding of hCA IX-c stability and activity in low-pH tumor microenvironments and may be applicable to determining pH-related effects on enzymes.

Surface modification of ZnAl{sub 1.9}Eu{sub 0.05}O{sub 4} aiming to obtaining ZnAl{sub 1.9}Eu{sub 0.05}O{sub 4}/SiO{sub 2} hybrid for use as a biosensor; Modificacao da superficie do ZnAl{sub 1.9}Eu{sub 0.05}O{sub 4} visando a obtencao do hibrido ZnAl{sub 1.9}Eu{sub 0.05}O{sub 4}/SiO{sub 2} para aplicacao como biossensor

Energy Technology Data Exchange (ETDEWEB)

Araujo, P.M.A.G.; Santos, P.T.A.; Costa, A.C.F.M., E-mail: pascally.guerra@gmail.com, E-mail: polyanaquimica@yahoo.com.br, E-mail: ana.costa@ufcg.edu.br [Universidade Federal de Campina Grande (UFCG), PB (Brazil); Junior, S.A.; Viana, R. S., E-mail: salvesjr@ufpe.br, E-mail: rodrigosilva.viana@yahoo.com.br [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil)

2017-01-15

This study aimed to investigate the influence of surface modification of ZnAl{sub 1.9}Eu{sub 0.05}O{sub 4} nanoparticles for obtaining hybrid ZnAl{sub 1.9}Eu{sub 0.05}O{sub 4}/SiO{sub 2} for application as a biosensor. Initially ZnAl{sub 1.9}Eu{sub 0.05}O{sub 4} nanoparticles were synthesized by combustion reaction and, subsequently, their surfaces were modified with silane agent. The samples were characterized by X-ray diffraction, scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and excitation and emission spectroscopy. The results showed formation of ZnAl{sub 2}O{sub 4} as the major phase. By SEM, hard agglomerates, irregularly shaped in the form of plaques, with the presence of few irregular and variables pores were observed. The surface modification was confirmed by FTIR through the silanol and siloxane groups. The excitation and emission spectra revealed the presence of a broadband of ZnAl{sub 2} O{sub 4} matrix, and fine and intense transitions from europium ion arising from doping of non-stoichiometric ZnAl{sub 2}O{sub 4} with the europium. From the results of emission and excitation, it was observed that the luminescence of ZnAl{sub 1.9}Eu{sub 0.05}O{sub 4}/SiO{sub 2} hybrid presented a small decrease in relation to the ZnAl{sub 1.9}Eu0.0{sub 5}O{sub 4} nanoparticles. This decrease was almost insignificant in relation to the benefits of silanization caused by the introduction of functional groups that promote combination of hybrid ZnAl{sub 1.9}Eu{sub 0.05}O{sub 4}/SiO{sub 2} with biomolecules, being this promising for application as a biosensor used in the biomedical field for the diagnosis and treatment of diseases. (author)

STS-9 crewmembers in training session in bldg 9A

Science.gov (United States)

1983-01-01

Members of the STS-9 crew discuss flight procedures with a trainer in bldg 9A before the STS-9 mission. From left to right are Brewster Shaw, pilot; John Young, crew commander; Robert Parker, mission specialist; and unidentified trainer. They are reviewing procedures manuals on the shuttle mock-up hatch.

Reduction of NO{sub x} emissions from the combustion of hard coals ''RENOX''; Reduccion de Emisiones de NO{sub x} en la combustion de Carbones Antracitosos ''RENOX''

Energy Technology Data Exchange (ETDEWEB)

NONE

2000-07-01

The present project, whose abbreviated name is RENOX, has the aim of reducing NO{sub x} emissions from the combustion of hard coals or coals with low volatile matter contents. It is applied to the combustion of these coals in arc boilers (or ''U'' boilers), where the necessary combination of long presence times and high hearth temperatures facilitates the high NO{sub x} levels reached. The intended reduction in emissions is approached through the application of primary combustion measures, also known as adjustment or refining of combustion. This solution is adopted for two reasons: due to its efficiency in environmental and economic terms, and because it is an unavoidable step if the levels to be attained require the installation of specific gas crubbing systems (secondary measures). The practical nature of RENOX has led to the development of the project in two phases, corresponding to two logical stages: phase 1, associated with the RNA project, on the characterization of emissions and combustion, complex numeric modelling of flows inside the boiler, and determination of the viability and scope of the optimization of emissions, and phase 2, the OPTINOXproject, which follows the methodology and lessons of the first phase and, as a natural continuation of this, deals with the design, development, manufacturing and validation of a computerized system that processes real time data on the boiler where it is installed to monitor, supervise and control the commercial operation of the plant, optimizing its combustion efficiency and/or NO{sub x} emissions. The practical objective of this project is represented by the construction of a validated prototype to demonstrate the OPTINOX system, which is capable of determining operating and control strategies that can minimize NO{sub x} emissions without unfavourably affecting the productivity and specific consumption of the units. Phase 1 development activities took place in groups 3, 4 and 5 of Compostilla II thermal power

A comparative study of ATPase subunit 9 (Atp9) gene between ...

African Journals Online (AJOL)

ATPase subunit 9 gene (Atp9) is an important functional gene in mitochondria, and is closely related with energy supply. RNA editing of atp9 gene was associated with male sterility in plants. In this study, the atp9 gene in soybeans was cloned from a soybean cytoplasmic male sterile line NJCMS2A and its maintainer line ...

Performance measurement of PSF modeling reconstruction (True X) on Siemens Biograph TruePoint TrueV PET/CT.

Science.gov (United States)

Lee, Young Sub; Kim, Jin Su; Kim, Kyeong Min; Kang, Joo Hyun; Lim, Sang Moo; Kim, Hee-Joung

2014-05-01

The Siemens Biograph TruePoint TrueV (B-TPTV) positron emission tomography (PET) scanner performs 3D PET reconstruction using a system matrix with point spread function (PSF) modeling (called the True X reconstruction). PET resolution was dramatically improved with the True X method. In this study, we assessed the spatial resolution and image quality on a B-TPTV PET scanner. In addition, we assessed the feasibility of animal imaging with a B-TPTV PET and compared it with a microPET R4 scanner. Spatial resolution was measured at center and at 8 cm offset from the center in transverse plane with warm background activity. True X, ordered subset expectation maximization (OSEM) without PSF modeling, and filtered back-projection (FBP) reconstruction methods were used. Percent contrast (% contrast) and percent background variability (% BV) were assessed according to NEMA NU2-2007. The recovery coefficient (RC), non-uniformity, spill-over ratio (SOR), and PET imaging of the Micro Deluxe Phantom were assessed to compare image quality of B-TPTV PET with that of the microPET R4. When True X reconstruction was used, spatial resolution was RC with True X reconstruction was higher than that with the FBP method and the OSEM without PSF modeling method on the microPET R4. The non-uniformity with True X reconstruction was higher than that with FBP and OSEM without PSF modeling on microPET R4. SOR with True X reconstruction was better than that with FBP or OSEM without PSF modeling on the microPET R4. This study assessed the performance of the True X reconstruction. Spatial resolution with True X reconstruction was improved by 45 % and its % contrast was significantly improved compared to those with the conventional OSEM without PSF modeling reconstruction algorithm. The noise level was higher than that with the other reconstruction algorithm. Therefore, True X reconstruction should be used with caution when quantifying PET data.

Using 13X, LiX, and LiPdAgX zeolites for CO_2 capture from post-combustion flue gas

International Nuclear Information System (INIS)

Chen, S.J.; Zhu, M.; Fu, Y.; Huang, Y.X.; Tao, Z.C.; Li, W.L.

2017-01-01

Highlights: • We synthesized a novel adsorbent named LiPdAgX zeolite. • CCS was proposed from microstructure, selectivity and separation factor of zeolite. • The static and flowing adsorption using CO_2/N_2 mixture on X zeolites were studied. • LiPdAgX zeolite required less energy for regeneration compared to 13X and MEA. • LiPdAgX zeolite can effectively capture CO_2 from post-combustion flue gas. - Abstract: This work investigates the application of X zeolites for capturing CO_2 from post-combustion flue gas. LiX and LiPdAgX zeolites were prepared by an ion-exchange method using 13X zeolite. X-ray diffraction analysis showed that all samples exhibited characteristic peaks of X zeolites, where the peak intensities increased in the order: LiPdAgX > LiX > 13X. The enhanced intensity of the diffraction peaks can increase the activity of the X zeolites and improve their adsorption performance. Scanning electron microscopy imaging showed that the intergranular pore canals of LiPdAgX zeolite were more concentrated. Pore structure analysis indicated that addition of Li"+ to the 13X zeolite enhanced the specific surface areas and pore volumes of the zeolites. Among the 13X, LiX, and LiPdAgX zeolites, LiPdAgX showed the highest CO_2/N_2selectivity, where the difference in the CO_2 adsorption capacity was due to differences in the number of adsorption sites and thermal conductivities of the X zeolites. The CO_2 breakthrough time increased in succession for the 13X, LiX, and LiPdAgX zeolites. The CO_2/N_2 separation factor of the LiPdAgX zeolite was twice that of the 13X zeolite at a CO_2 concentration of 20 vol.%. The temperature variations during the adsorption process were used to determine the regeneration energy and adsorption capacity of the X zeolites. LiPdAgX zeolite required less energy for regeneration than 13X zeolite and MEA. After regeneration, the separation factor of LiPdAgX zeolite remained at 6.38 for 20 vol.% CO_2 in the flue gas. Therefore, LiPdAgX

The 3d8-(3d74p + 3p53d9) transitions in Br X: A striking case of configuration interaction

International Nuclear Information System (INIS)

Kleef, T.A.M. van; Uylings, P.H.M.; Ryabtsev, A.N.; Podobedova, L.I.; Joshi, Y.N.

1988-01-01

The spectrum of nine times ionized bromine (Br X) was photographed in the 90-120 A wavelength region on a variety of grazing incidence spectrographs using an open spark and a triggered spark as light sources. The analysis of the 3d 8 -(3d 7 4p + 3p 5 3d 9 ) transitions has resulted in establishing all 9 levels of the 3d 8 configuration, all 12 levels of the 3p 5 3d 9 configuration and 99 out of 110 levels of the 3d 7 4p configuration. The excitation probability of the 3p inner-shell electron increases with nuclear charge and in Br X is comparable with the excitation probability of the optical electrons resulting in a very strong configuration interaction between the 3p 5 3d 9 and 3d 7 4p configurations. Parametric calculations treating these configurations as one super configuration support the analysis. Two hundred and thirty two lines have been classified in this spectrum. (orig.)

Magnetic Properties of La0.9Ag0.1(Mn1-xCoxO3 under Pressure

Directory of Open Access Journals (Sweden)

Mihalik M.

2013-01-01

Full Text Available In our paper we report on magnetic properties of La0.90Ag0.10(CoxMn1-xO3 ferromagnetic ceramics (x = 0.00 and0.03 which were studied in pressures up to 0.9 GPa. Magnetic transition at the Curie temperature TC is accompanied with metal insulator transition with a maximum at T* which is shifted to lower temperature with applied magnetic field. The Curie temperature is decreasing with substitution of Co for Mn and is ranging from 178 K to 126.5 K. Hydrostatic pressure increases TC for sample with x = 0.03 nearly linearly with the pressure coefficient dTc/dp = 5.7 K/GPa. Hysteresis loop is affected marginally; µs increases and Hc decreases with pressure.

Sox9

DEFF Research Database (Denmark)

Seymour, Philip A

2014-01-01

Over the last decade, it has been discovered that the transcription factor Sox9 plays several critical roles in governing the development of the embryonic pancreas and the homeostasis of the mature organ. While analysis of pancreata from patients affected by the Sox9 haploinsufficiency syndrome...... endocrine differentiation and maintaining pancreatic ductal identity, and it has recently been unveiled as a key player in the initiation of pancreatic cancer. These functions of Sox9 are discussed in this article, with special emphasis on the knowledge gained from various loss-of-function and lineage...

Evaluation of proton induced reactions on sup 1 sup 0 sup 0 Mo. New cross sections for production of sup 9 sup 9 sup m Tc and sup 9 sup 9 Mo

CERN Document Server

Takács, S; Tarkanyi, F; Hermanne, A; Sonck, M

2003-01-01

The use of the sup 9 sup 9 Mo -> sup 9 sup 9 sup m Tc generator in nuclear medicine is well established world wide. The production of the sup 9 sup 9 Mo (T sub 1 sub / sub 2 = 66 h) parent as a fission product of sup 2 sup 3 sup 5 U is largely based on the use of reactor technology. From the early 1990's accelerator based production methods to provide either direct produced sup 9 sup 9 sup m Tc or the parent sup 9 sup 9 Mo, were studied and suggested as potential alternatives to the reactor based production of sup 9 sup 9 Mo. A possible pathway for the charged particle production of sup 9 sup 9 sup m Tc and sup 9 sup 9 Mo is irradiation of molybdenum metal with protons via the reaction sup 1 sup 0 sup 0 Mo(p,2n) sup 9 sup 9 sup m Tc and sup 1 sup 0 sup 0 Mo(p,pn) sup 9 sup 9 Mo, respectively. The earlier published excitation functions show large differences in their maximum that result in large differences in the calculated yields. Study the excitation function for these proton-induced reactions was decided. ...

Tuning of superconductivity by Ni substitution into noncentrosymmetric ThC o1 -xN ixC2

Science.gov (United States)

Grant, T. W.; Cigarroa, O. V.; Rosa, P. F. S.; Machado, A. J. S.; Fisk, Z.

2017-07-01

The recently discovered noncentrosymmetric superconductor ThCoC2 was observed to show unusual superconducting behavior with a critical temperature of Tc=2.65 K . Here we investigate the effect of nickel substitution on the superconducting state in ThC o1 -xN ixC2 . Magnetization, resistivity, and heat capacity measurements demonstrate Ni substitution has a dramatic effect with critical temperature increased up to Tc=12.1 K for x =0.4 Ni concentration, which is a rather high transition temperature for a noncentrosymmetric superconductor. In addition, the unusual superconducting characteristics observed in pure ThCoC2 appear to be suppressed or tuned with Ni substitution towards a more conventional fully gapped superconductor.

Electrode contacts on ferroelectric Pb(Zr x Ti1−x )O3 and SrBi2Ta2O9 thin films and their influence on fatigue properties

OpenAIRE

Lee, J. J.; Thio, C. L.; Desu, Seshu B.

1995-01-01

The degradation (fatigue) of dielectric properties of ferroelectric Pb(ZrxTi1-x)O-3 (PZT) and SrBi2Ta2O9 thin films during cycling was investigated. PZT and SrBi2Ta2O9 thin films were fabricated by metalorganic decomposition and pulsed laser deposition, respectively. Samples with electrodes of platinum (Pt) and ruthenium oxide (RuO2) were studied. The interfacial capacitance (if any) at the Pt/PZT, RuO2/PZT, and Pt/SrBi2Ta2O9 interfaces was determined from the thickness dependence of low-fiel...

Prdm9 incompatibility controls oligospermia and delayed fertility but no selfish transmission in mouse intersubspecific hybrids.

Science.gov (United States)

Flachs, Petr; Bhattacharyya, Tanmoy; Mihola, Ondřej; Piálek, Jaroslav; Forejt, Jiří; Trachtulec, Zdenek

2014-01-01

PR-domain 9 (Prdm9) is the first hybrid sterility gene identified in mammals. The incompatibility between Prdm9 from Mus musculus domesticus (Mmd; the B6 strain) and the Hstx2 region of chromosome (Chr) X from M. m. musculus (Mmm; the PWD strain) participates in the complete meiotic arrest of mouse intersubspecific (PWD×B6)F1 hybrid males. Other studies suggest that also semisterile intersubspecific hybrids are relevant for mouse speciation, but the genes responsible remain unknown. To investigate the causes of this semisterility, we analyzed the role of Prdm9 and Chr X in hybrids resulting from the crosses of PWK, another Mmm-derived inbred strain. We demonstrate that Prdm9 and Chr X control the partial meiotic arrest and reduced sperm count in (PWK×B6)F1 males. Asynapsis of heterosubspecific chromosomes and semisterility were partially suppressed by removal of the B6 allele of Prdm9. Polymorphisms between PWK and PWD on Chr X but not in the Prdm9 region were responsible for the modification of the outcome of Prdm9-Chr X F1 hybrid incompatibility. Furthermore, (PWK×B6)F1 hybrid males displayed delayed fertility dependent on the Prdm9 incompatibility. While the Drosophila hybrid sterility gene Overdrive causes both delayed fertility and increased transmission of its own chromosome to the offspring, the segregation of Chr X and the Prdm9 region from the mouse (PWK×B6)F1 males was normal. Our results indicate extended functional consequences of Prdm9-Chr X intersubspecific incompatibility on the fertility of hybrids and should influence the design of fertility analyses in hybrid zones and of laboratory crosses between Mmm and Mmd strains.

Prdm9 incompatibility controls oligospermia and delayed fertility but no selfish transmission in mouse intersubspecific hybrids.

Directory of Open Access Journals (Sweden)

Petr Flachs

Full Text Available PR-domain 9 (Prdm9 is the first hybrid sterility gene identified in mammals. The incompatibility between Prdm9 from Mus musculus domesticus (Mmd; the B6 strain and the Hstx2 region of chromosome (Chr X from M. m. musculus (Mmm; the PWD strain participates in the complete meiotic arrest of mouse intersubspecific (PWD×B6F1 hybrid males. Other studies suggest that also semisterile intersubspecific hybrids are relevant for mouse speciation, but the genes responsible remain unknown. To investigate the causes of this semisterility, we analyzed the role of Prdm9 and Chr X in hybrids resulting from the crosses of PWK, another Mmm-derived inbred strain. We demonstrate that Prdm9 and Chr X control the partial meiotic arrest and reduced sperm count in (PWK×B6F1 males. Asynapsis of heterosubspecific chromosomes and semisterility were partially suppressed by removal of the B6 allele of Prdm9. Polymorphisms between PWK and PWD on Chr X but not in the Prdm9 region were responsible for the modification of the outcome of Prdm9-Chr X F1 hybrid incompatibility. Furthermore, (PWK×B6F1 hybrid males displayed delayed fertility dependent on the Prdm9 incompatibility. While the Drosophila hybrid sterility gene Overdrive causes both delayed fertility and increased transmission of its own chromosome to the offspring, the segregation of Chr X and the Prdm9 region from the mouse (PWK×B6F1 males was normal. Our results indicate extended functional consequences of Prdm9-Chr X intersubspecific incompatibility on the fertility of hybrids and should influence the design of fertility analyses in hybrid zones and of laboratory crosses between Mmm and Mmd strains.

Combustion, cofiring and emissions characteristics of torrefied biomass in a drop tube reactor

International Nuclear Information System (INIS)

Ndibe, Collins; Maier, Jörg; Scheffknecht, Günter

2015-01-01

The study investigates cofiring characteristics of torrefied biomass fuels at 50% thermal shares with coals and 100% combustion cases. Experiments were carried out in a 20 kW, electrically heated, drop-tube reactor. Fuels used include a range of torrefied biomass fuels, non-thermally treated white wood pellets, a high volatile bituminous coal and a lignite coal. The reactor was maintained at 1200 °C while the overall stoichiometric ratio was kept constant at 1.15 for all combustion cases. Measurements were performed to evaluate combustion reactivity, emissions and burn-out. Torrefied biomass fuels in comparison to non-thermally treated wood contain a lower amount of volatiles. For the tests performed at a similar particle size distribution, the reduced volatile content did not impact combustion reactivity significantly. Delay in combustion was only observed for test fuel with a lower amount of fine particles. The particle size distribution of the pulverised grinds therefore impacts combustion reactivity more. Sulphur and nitrogen contents of woody biomass fuels are low. Blending woody biomass with coal lowers the emissions of SO 2 mainly as a result of dilution. NO X emissions have a more complex dependency on the nitrogen content. Factors such as volatile content of the fuels, fuel type, furnace and burner configurations also impact the final NO X emissions. In comparison to unstaged combustion, the nitrogen conversion to NO X declined from 34% to 9% for air-staged co-combustion of torrefied biomass and hard coal. For the air-staged mono-combustion cases, nitrogen conversion to NO X declined from between 42% and 48% to about 10%–14%. - Highlights: • Impact of torrefaction on cofiring was studied at high heating rates in a drop tube. • Cofiring of torrefied biomasses at high thermal shares (50% and higher) is feasible. • Particle size impacts biomass combustion reactivity more than torrefaction. • In a drop tube reactor, torrefaction has no negative

Identification of genes encoding the type IX secretion system and secreted proteins in Flavobacterium columnare IA-S-4

Science.gov (United States)

Flavobacterium columnare, a member of the phylum Bacteroidetes, causes columnaris disease in wild and aquaculture-reared freshwater fish. The mechanisms responsible for columnaris disease are not known. Many members of the phylum Bacteroidetes use type IX secretion systems (T9SSs) to secrete enzymes...

Crystallization and preliminary X-ray diffraction study of recombinant ribokinase from Thermus Species 2.9

Energy Technology Data Exchange (ETDEWEB)

Abramchik, Yu. A. [Russian Academy of Sciences, Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry (Russian Federation); Timofeev, V. I., E-mail: tostars@mail.ru [Russian Academy of Sciences, Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics,” (Russian Federation); Muravieva, T. I.; Esipov, R. S., E-mail: espiov@mx.ibch.ru [Russian Academy of Sciences, Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry (Russian Federation); Kuranova, I. P., E-mail: inna@ns.crys.ras.ru [Russian Academy of Sciences, Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics,” (Russian Federation)

2016-11-15

Ribokinase from a thermophilic strain of Thermus species 2.9 belonging to the carbohydrate ribokinase family (EC 2.7.1.15) was isolated, purified, and crystallized. The crystallization conditions were found by the vapor-diffusion technique and were then optimized to apply the capillary counter-diffusion technique. The X-ray diffraction data set was collected from the crystals, which were grown by the counter-diffusion technique, at the SPring-8 synchrotron radiation facility to 2.87 Å resolution. The crystals belong to sp. gr. P12{sub 1}1 and have the following unit-cell parameters: a = 81.613 Å, b = 156.132 Å, c = 87.714 Å, α = γ = 90°, β = 103.819°. The X-ray diffraction data set is suitable for determining the three-dimensional structure of the protein by the molecular-replacement method.

Postirradiation fracture toughness tests of ESR alloy HT-9 and modified 9Cr-1Mo alloy from UBR reactor experiments

International Nuclear Information System (INIS)

Hawthorne, J.R.; Reed, J.R.; Sprague, J.A.

1984-01-01

Alloy HT-9 and Modified 9Cr-1Mo are being evaluated for potential applications as first wall materials in magnetic fusion reactors. Objectives of the current research task were to test fatigue-precracked Charpy-V (PCC/sub v/) specimens from representative plates irradiated in the UBR reactor at 149 0 C or 300 0 C, and, to compare the results against postirradiation notch ductility data developed previously for the materials. Both plates represent electroslag refined (ESR) melt processing. PCC/sub v/ specimens of Alloy HT-9 and Modified 9Cr-1Mo alloy were irradiated at 300 0 C and 149 0 C, respectively, to approx.0.8 X 10 20 n/cm 2 , E > 0.1 MeV. During this period, postirradiation tests for fracture toughness were completed and results compared to notch ductility determinations from standard Charpy-V (C/sub v/) specimens irradiated in the same reactor experiments. Fracture surface examinations by SEM are also reported

75 FR 75872 - Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-30, DC-9-40, and DC-9-50...

Science.gov (United States)

2010-12-07

... Airworthiness Directives; McDonnell Douglas Corporation Model DC- 9-30, DC-9-40, and DC-9-50 Series Airplanes...: We are adopting a new airworthiness directive (AD) for the McDonnell Douglas Corporation airplanes... to include an airworthiness directive (AD) that would apply to certain McDonnell Douglas Model DC-9...

YOUNG STELLAR POPULATIONS IN MYStIX STAR-FORMING REGIONS: CANDIDATE PROTOSTARS

Energy Technology Data Exchange (ETDEWEB)

Romine, Gregory; Feigelson, Eric D.; Getman, Konstantin V. [Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Lab, University Park, PA 16802 (United States); Kuhn, Michael A. [Millennium Institute of Astrophysics, Camino El Observatorio 1515, Las Condes, Santiago (Chile); Povich, Matthew S., E-mail: edf@astro.psu.edu [Department of Physics and Astronomy, California State Polytechnic University, 3801 West Temple Ave., Pomona, CA 91768 (United States)

2016-12-20

The Massive Young Star-Forming Complex in Infrared and X-ray (MYStIX) project provides a new census on stellar members of massive star-forming regions within 4 kpc. Here the MYStIX Infrared Excess catalog and Chandra -based X-ray photometric catalogs are mined to obtain high-quality samples of Class I protostars using criteria designed to reduce extragalactic and Galactic field star contamination. A total of 1109 MYStIX Candidate Protostars (MCPs) are found in 14 star-forming regions. Most are selected from protoplanetary disk infrared excess emission, but 20% are found from their ultrahard X-ray spectra from heavily absorbed magnetospheric flare emission. Two-thirds of the MCP sample is newly reported here. The resulting samples are strongly spatially associated with molecular cores and filaments on Herschel far-infrared maps. This spatial agreement and other evidence indicate that the MCP sample has high reliability with relatively few “false positives” from contaminating populations. But the limited sensitivity and sparse overlap among the infrared and X-ray subsamples indicate that the sample is very incomplete with many “false negatives.” Maps, tables, and source descriptions are provided to guide further study of star formation in these regions. In particular, the nature of ultrahard X-ray protostellar candidates without known infrared counterparts needs to be elucidated.

YOUNG STELLAR POPULATIONS IN MYStIX STAR-FORMING REGIONS: CANDIDATE PROTOSTARS

International Nuclear Information System (INIS)

Romine, Gregory; Feigelson, Eric D.; Getman, Konstantin V.; Kuhn, Michael A.; Povich, Matthew S.

2016-01-01

The Massive Young Star-Forming Complex in Infrared and X-ray (MYStIX) project provides a new census on stellar members of massive star-forming regions within 4 kpc. Here the MYStIX Infrared Excess catalog and Chandra -based X-ray photometric catalogs are mined to obtain high-quality samples of Class I protostars using criteria designed to reduce extragalactic and Galactic field star contamination. A total of 1109 MYStIX Candidate Protostars (MCPs) are found in 14 star-forming regions. Most are selected from protoplanetary disk infrared excess emission, but 20% are found from their ultrahard X-ray spectra from heavily absorbed magnetospheric flare emission. Two-thirds of the MCP sample is newly reported here. The resulting samples are strongly spatially associated with molecular cores and filaments on Herschel far-infrared maps. This spatial agreement and other evidence indicate that the MCP sample has high reliability with relatively few “false positives” from contaminating populations. But the limited sensitivity and sparse overlap among the infrared and X-ray subsamples indicate that the sample is very incomplete with many “false negatives.” Maps, tables, and source descriptions are provided to guide further study of star formation in these regions. In particular, the nature of ultrahard X-ray protostellar candidates without known infrared counterparts needs to be elucidated.

Deconvolution of X-ray diffraction profiles using series expansion: a line-broadening study of polycrystalline 9-YSZ

Energy Technology Data Exchange (ETDEWEB)

Sanchez-Bajo, F. [Universidad de Extremadura, Badajoz (Spain). Dept. de Electronica e Ingenieria Electromecanica; Ortiz, A.L.; Cumbrera, F.L. [Universidad de Extremadura, Badajoz (Spain). Dept. de Fisica

2001-07-01

Deconvolution of X-ray diffraction profiles is a fundamental step in obtaining reliable results in the microstructural characterization (crystallite size, lattice microstrain, etc) of polycrystalline materials. In this work we have analyzed a powder sample of 9-YSZ using a technique based on the Fourier series expansion of the pure profile. This procedure, which can be combined with regularization methods, is specially powerful to minimize the effects of the ill-posed nature of the linear integral equation involved in the kinematical theory of X-ray diffraction. Finally, the deconvoluted profiles have been used to obtain microstructural parameters by means of the integral-breadth method. (orig.)

Effects of Sr2+ substitution on photoluminescence characteristics of Ba1−x−ySryZrSi3O9:xEu2+ phosphors

International Nuclear Information System (INIS)

Chiang, Chung-Hao; Gong, Syuan-Jhih; Lin, Han-Yu; Zhan, Ting-Shi; Chu, Sheng-Yuan

2014-01-01

In this work, single-phase Ba 1−x−y Sr y ZrSi 3 O 9 :xEu 2+ phosphors were synthesized via the solid-state reaction method. The crystal structure and luminescence properties were investigated using X-ray diffraction and photoluminescence measurements, respectively. An increase of the dopant Sr 2+ increased the emission intensity of the phosphors. The peak intensity of the samples was at y = 0.4 under near-ultraviolet light excitation (397 nm). The wavelength of the emission peaks red-shifts slightly from 477 to 483 nm due to the splitting of the 5d energy level. Sr 2+ ions have a smaller ionic radius than that of Ba 2+ ions, and thus the dopant changes the crystal structure, improving the energy transfer efficiency between luminescence centers. More Eu 2+ solid solubility was found in Ba 0.6−x Sr 0.4 ZrSi 3 O 9 :xEu 2+ phosphors (10 mol. %) than in the host BaZrSi 3 O 9 (6 mol. %), which enhanced the emission intensity. In addition, the thermal reliability of the phosphors was studied

Neutrophil Gelatinase-Associated Lipocalin (NGAL, Pro-Matrix Metalloproteinase-9 (pro-MMP-9 and Their Complex Pro-MMP-9/NGAL in Leukaemias

Directory of Open Access Journals (Sweden)

Sandrine Bouchet

2014-04-01

Full Text Available Matrix metalloproteinase (MMP-9 and neutrophil gelatinase-associated lipocalin (NGAL have gained attention as cancer biomarkers. The inactive zymogen form of MMP-9 (pro-MMP-9 also exists as a disulphide-linked heterodimer bound to NGAL in humans. Leukaemias represent a heterogeneous group of neoplasms, which vary in their clinical behavior and pathophysiology. In this review, we summarize the current literature on the expression profiles of pro-MMP-9 and NGAL as prognostic factors in leukaemias. We also report the expression of the pro-MMP-9/NGAL complex in these diseases. We discuss the roles of (pro-MMP-9 (active and latent forms and NGAL in tumour development, and evaluate the mechanisms by which pro-MMP-9/NGAL may influence the actions of (pro-MMP-9 and NGAL in cancer. Emerging knowledge about the coexpression and the biology of (pro-MMP-9, NGAL and their complex in cancer including leukaemia may improve treatment outcomes.

Neutrophil Gelatinase-Associated Lipocalin (NGAL), Pro-Matrix Metalloproteinase-9 (pro-MMP-9) and Their Complex Pro-MMP-9/NGAL in Leukaemias

Energy Technology Data Exchange (ETDEWEB)

Bouchet, Sandrine; Bauvois, Brigitte, E-mail: brigitte.bauvois@crc.jussieu.fr [INSERM U1138, Université Pierre et Marie Curie, Université Paris-Descartes, Centre de Recherche des Cordeliers, Paris 75006 (France)

2014-04-04

Matrix metalloproteinase (MMP)-9 and neutrophil gelatinase-associated lipocalin (NGAL) have gained attention as cancer biomarkers. The inactive zymogen form of MMP-9 (pro-MMP-9) also exists as a disulphide-linked heterodimer bound to NGAL in humans. Leukaemias represent a heterogeneous group of neoplasms, which vary in their clinical behavior and pathophysiology. In this review, we summarize the current literature on the expression profiles of pro-MMP-9 and NGAL as prognostic factors in leukaemias. We also report the expression of the pro-MMP-9/NGAL complex in these diseases. We discuss the roles of (pro)-MMP-9 (active and latent forms) and NGAL in tumour development, and evaluate the mechanisms by which pro-MMP-9/NGAL may influence the actions of (pro)-MMP-9 and NGAL in cancer. Emerging knowledge about the coexpression and the biology of (pro)-MMP-9, NGAL and their complex in cancer including leukaemia may improve treatment outcomes.

Rad9 contribution to radiosensitivity and the G2 checkpoint in a DT40 cell line

Energy Technology Data Exchange (ETDEWEB)

Kumano, Tomoyasu [Kanazawa Univ. (Japan). Graduate School of Medical Science

2002-12-01

In fission yeast, the rad9 (radiation sensitive) gene was cloned from a mutant that is sensitive to ionizing radiation, ultraviolet and hydroxyurea. This gene has also been shown to be required for a DNA damage checkpoint. Orthologues of the rad9 gene have recently been identified in higher eukaryote cells including human. Here we generated Rad9 knockout (Rad9-/-) cells from the chicken B lymphocyte line DT40 to examine the role of Rad9 in higher eukaryotes. First we isolated a part of the chicken Rad9 gene which was 54% identical with human Rad9 at the amino acid sequence level. Next we isolated genomic clones, determined exons and introns, and constructed targeting vectors designed to disrupt exon 1-3 of the chicken Rad9 gene by replacement with a drug-resistant gene. Successful targeted integration was verified by Southern blot analysis and the disruption of the Rad9 gene was confirmed by reverse transcription polymerase chain reaction (RT-PCR). To analyze the radiosensitivity of these Rad9-/- cells, we monitored the clonogenic survival after various degrees of X-ray irradiation. Rad9-/- cells were more sensitive to X-rays than wild type cells at all dosages. However, these cells were less sensitive than ATM knockout (ATM-/-) cells that are known to be X-ray sensitive and that showed a defective checkpoint control. In contrast, Rad9-/- cells were markedly more sensitive to ultraviolet and hydroxyruea. In addition, we assessed the G2 checkpoint by measurement of the mitotic index that is the fraction of the accumulating number of cells in mitosis at various times after X-ray irradiation. While the number of mitotic wild type cells did not increase until 2 hrs after X-ray irradiation, the number of mitotic Rad9-/- cells showed an increase similar to that of ATM-/- cells. These results suggest that just as in fission yeast, in higher eukaryotes Rad9 also contributes to X-ray, ultraviolet and hydroxyurea sensitivity, and plays an important role in the G2 checkpoint

Rad9 contribution to radiosensitivity and the G2 checkpoint in a DT40 cell line

International Nuclear Information System (INIS)

Kumano, Tomoyasu

2002-01-01

In fission yeast, the rad9 (radiation sensitive) gene was cloned from a mutant that is sensitive to ionizing radiation, ultraviolet and hydroxyurea. This gene has also been shown to be required for a DNA damage checkpoint. Orthologues of the rad9 gene have recently been identified in higher eukaryote cells including human. Here we generated Rad9 knockout (Rad9-/-) cells from the chicken B lymphocyte line DT40 to examine the role of Rad9 in higher eukaryotes. First we isolated a part of the chicken Rad9 gene which was 54% identical with human Rad9 at the amino acid sequence level. Next we isolated genomic clones, determined exons and introns, and constructed targeting vectors designed to disrupt exon 1-3 of the chicken Rad9 gene by replacement with a drug-resistant gene. Successful targeted integration was verified by Southern blot analysis and the disruption of the Rad9 gene was confirmed by reverse transcription polymerase chain reaction (RT-PCR). To analyze the radiosensitivity of these Rad9-/- cells, we monitored the clonogenic survival after various degrees of X-ray irradiation. Rad9-/- cells were more sensitive to X-rays than wild type cells at all dosages. However, these cells were less sensitive than ATM knockout (ATM-/-) cells that are known to be X-ray sensitive and that showed a defective checkpoint control. In contrast, Rad9-/- cells were markedly more sensitive to ultraviolet and hydroxyruea. In addition, we assessed the G2 checkpoint by measurement of the mitotic index that is the fraction of the accumulating number of cells in mitosis at various times after X-ray irradiation. While the number of mitotic wild type cells did not increase until 2 hrs after X-ray irradiation, the number of mitotic Rad9-/- cells showed an increase similar to that of ATM-/- cells. These results suggest that just as in fission yeast, in higher eukaryotes Rad9 also contributes to X-ray, ultraviolet and hydroxyurea sensitivity, and plays an important role in the G2 checkpoint

Some observations on the synthesis and electrolytic properties of (Ba1-xCax (M0.9Y0.1O3, M = Ce, Zr-based samples modified with calcium

Directory of Open Access Journals (Sweden)

Dudek Magdalena

2016-03-01

Full Text Available In this paper, the impact of partial substitution of calcium for barium in (Ba1-xCax (M0.9Y0.1 O3, M = Ce, Zr on physicochemical properties of the powders and sintered samples was investigated. The powders, with various contents of calcium (x = 0, 0.02, 0.05, 0.1, were prepared by means of thermal decomposition of organometallic precursors containing EDTA. All of the BaCeO3-based powders synthesised at 1100 °C were monophasic with a rhombohedral structure, however, completely cubic BaZrO3-based solid solutions were obtained at 1200 °C. A study of the sinterability of BaZr0.9Y0.1O3 and BaCe0.9Y0.1O3-based pellets was performed under non-isothermal conditions within a temperature range of 25 to 1200 °C. The partial substitution of barium for calcium in the (Ba1-xCax (M0.9Y0.1 O3, M = Ce, Zr solid solution improved the sinterability of the samples in comparison to the initial BaCe0.9Y0.1O3 or BaZr0.9Y0.1O3. The relative density of calcium-modified BaCe0.9Y0.1O3-based samples reached approximately 95 to 97 % after sintering at 1500 °C for 2 h in air. The same level of relative density was achieved after sintering calcium-modified BaZr0.9Y0.1O3 at 1600 °C for 2 h. Analysis of the electrical conductivity from both series of investigated materials showed that the highest ionic conductivity, in air and wet 5 % H2 in Ar, was attained for the compositions of x = 0.02 to 0.05 (Ba1-xCax(M0.9Y0.1O3, M = Zr, Ce. The oxygen reduction reaction on the interface Pt│BaM0.9Y0.1O3, M = Ce, Zr was investigated using Pt microelectrodes. Selected samples of (Ba1-xCax (M0.9Y0.1O3, M = Zr, Ce were tested as ceramic electrolytes in hydrogen-oxygen solid oxide fuel cells operating at temperatures of 700 to 850 °C.

Improvement of a combustion model in MELCOR code

International Nuclear Information System (INIS)

Ogino, Masao; Hashimoto, Takashi

1999-01-01

NUPEC has been improving a hydrogen combustion model in MELCOR code for severe accident analysis. In the proposed combustion model, the flame velocity in a node was predicted using five different flame front shapes of fireball, prism, bubble, spherical jet, and plane jet. For validation of the proposed model, the results of the Battelle multi-compartment hydrogen combustion test were used. The selected test cases for the study were Hx-6, 13, 14, 20 and Ix-2 which had two, three or four compartments under homogeneous hydrogen concentration of 5 to 10 vol%. The proposed model could predict well the combustion behavior in multi-compartment containment geometry on the whole. MELCOR code, incorporating the present combustion model, can simulate combustion behavior during severe accident with acceptable computing time and some degree of accuracy. The applicability study of the improved MELCOR code to the actual reactor plants will be further continued. (author)

An orange emitting phosphor Lu2−xCaMg2Si2.9Ti0.1O12:xCe with pure garnet phase for warm white LEDs

International Nuclear Information System (INIS)

Chu, Yaoqing; Zhang, Qinghong; Xu, Jiayue; Li, Yaogang; Wang, Hongzhi

2015-01-01

A new silicate garnet phosphor, Lu 2−x CaMg 2 Si 2.9 Ti 0.1 O 12 :xCe was synthesized by a high temperature solid-state reaction under reductive atmosphere. X-ray diffraction (XRD) showed that the powder was pure garnet phase. The emission and excitation spectrum indicated that the Lu 2−x CaMg 2 Si 2.9 Ti 0.1 O 12 :xCe phosphors could absorb blue light in the spectral range of 400–550 nm efficiently and exhibit bright yellow–orange emission in the range of 520–750 nm. With the increase of Ce 3+ concentration, the emission band of Ce 3+ showed a red shift. Interestingly, the concentration quenching occurred when the Ce 3+ concentration exceeded 4 mol%. The temperature-dependent luminescent properties of the phosphors were discussed and the Lu 1.96 CaMg 2 Si 2.9 Ti 0.1 O 12 :0.04Ce phosphors showed good performances in color temperature (2430 K) and potential applications for warm white LEDs. - Graphical Abstract: This image shows that the phosphor of Lu 1.96 CaMg 2 Si 2.9 Ti 0.1 O 12 :0.04Ce can generate a uniform yellow tint under natural light illumination and emit orange–red light when excited by blue light. With a fixed 467 nm emission light, warm white light can be produced by this phosphor, which indicates that the phosphor is potentially applicable in warm white light emitting diodes based on GaN chips. - Highlights: • A new silicate garnet phosphor was synthesized by solid-state method. • Secondary phases can be avoided when a small amount of Si 4+ were replaced by Ti 4+ . • A broad emission band of Ce 3+ in the phosphors was described. • The phosphors are potentially applicable in warm white light emitting diodes

IX : An OS for datacenter applications with aggressive networking requirements

CERN Multimedia

CERN. Geneva

2014-01-01

The conventional wisdom is that aggressive networking requirements, such as high packet rates for small messages and microsecond-scale tail latency, are best addressed outside the kernel, in a user-level networking stack. We present IX, a dataplane operating system designed to support low-latency, high-throughput and high-connection count applications.  Like classic operating systems such as Linux, IX provides strong protection guarantees to the networking stack.  However, and unlike classic operating systems, IX is designed for the ground up to support applications with aggressive networking requirements on dense multi-core platforms with 10GbE and 40GbE Ethernet NICs.  IX outperforms Linux by an order of magnitude on micro benchmarks, and by up to 3.6x when running an unmodified memcached, a popular key-value store. The presentation is based on the joint work with Adam Belay, George Prekas, Ana Klimovic, Sam Grossman and Christos Kozyrakis, published at OSDI 2014; Best P...

Ce3 - xMgxCo9 : Transformation of a Pauli Paramagnet into a Strong Permanent Magnet

Science.gov (United States)

Lamichhane, Tej N.; Taufour, Valentin; Palasyuk, Andriy; Lin, Qisheng; Bud'ko, Sergey L.; Canfield, Paul C.

2018-02-01

We report on the synthesis of single-crystal and polycrystalline samples of Ce3 -xMgxCo9 solid solution (0 ≤x ≲1.4 ) and characterization of their structural and magnetic properties. The crystal structure remains rhombohedral in the whole composition range and Mg partially replaces Ce in the 6 c site of the CeCo3 structure. Ferromagnetism is induced by Mg substitutions starting as low as x =0.18 and reaching a Curie temperature as high as 450 K for x =1.35 . Measurements on single crystals with x =1.34 and TC=440 K indicate an axial magnetic anisotropy with an anisotropy field of 6 T and a magnetization of 6 μB/f .u . at 300 K. Coercicity is observed in the polycrystalline samples consistent with the observed axial magnetic anisotropy. Our discovery of ferromagnetism with large axial magnetic anisotropy induced by substituting a rare-earth element by Mg is a very promising result in the search of inexpensive permanent-magnet materials and suggests that other nonmagnetic phases, similar to CeCo3 , may also conceal nearby ferromagnetic phases.

Robustness of dynamic magnetism in the triangle-based antiferromagnets Ba3Ru1- x Ir x Ti2O9 ( x = 0.5 and 0.8)

Science.gov (United States)

Lee, W.-J.; Do, S.-H.; Lee, S.; Choi, Y.-S.; Choi, K.-Y.; Yoon, Sungwon; Suh, Byoungjin; Jang, Zeehoon

2018-01-01

We report on the spin dynamics of the strong spin-orbit coupled antiferromagnets Ba3Ru1- x Ir x Ti2O9 ( x = 0.5 and 0.8), which comprise a mixture of edge- and corner-sharing triangles. Muon spin-relaxation measurements give no hints of long-range magnetic order down to 25 mK. Rather, the muon spin-relaxation rates λ( T) show persistent spin dynamics below 1 K, indicating that fast fluctuations are dominant in spite of Ir4+( J eff = 1/2)/Ru4+( S = 1) randomness. The muon spin depolarization of both compounds is well described by a stretched exponential function with the stretching exponent β = 0.4 (0.6) for x = 0.5 (0.8) at low temperatures, which is larger than β = 1/3 expected for a spin glass. Our results suggest that randomness in the spin number and the exchange interaction induces a partial spin freezing, but the majority of spins remain dynamically fluctuating.

Fabrication and characterization of MCC approved testing material: ATM-9 glass

International Nuclear Information System (INIS)

Wald, J.W.

1986-06-01

The Materials Characterization Center ATM-9 glass is designed to be representative of glass to be produced by the Defense Waste Processing Facility at the Savannah River Plant, Aiken, South Carolina. ATM-9 glass contains all of the major components of the DWPF glass and corresponds to a waste loading of 29 wt %. The feedstock material for this glass was supplied by Savannah River Laboratory, Aiken, SC, as SRL-165 Black Frit to which was added Ba, Cs, Md, Nd, Zr, as well as 99 Tc, depleted U, 237 Np, 239+240 Pu, and 243 Am. The glass was produced under reducing conditions by the addition of 0.7 wt % graphite during the final melting process. Three kilograms of the glass were produced from April to May of 1984. On final melting, the glass was formed into stress-annealed rectangular bars of two sizes: 1.9 x 1.9 x 10 cm and 1.3 x 1.3 x 10 cm. Seventeen bars of each size were made. The analyzed composition of ATM-9 glass is listed. Examination by optical microscopy of a single transverse section from one bar showed random porosity estimated at 0.36 vol % with nominal pore diameters ranging from approx. 5 μm to 200 μm. Only one distinct second phase was observed and it was at a low concentraction level in the glass matrix. The phase appeared as spherical metallic particles. X-ray diffraction analysis of this same sample did not show any diffraction peaks from crystalline components, indicating that the glass contained less than 5 wt % of crystalline devitrification products. The even shading on the radiograph exposure indicated a generally uniform distribution of radioactivity throughout the glass matrix, with no distinct high-concentration regions

A new manufacturing process to remove thrombogenic factors (II, VII, IX, X, and XI) from intravenous immunoglobulin gamma preparations.

Science.gov (United States)

Park, Dong Hwarn; Kang, Gil Bu; Kang, Dae Eun; Hong, Jeung Woon; Lee, Min Gyu; Kim, Ki Yong; Han, Jeung Whan

2017-01-01

Coagulation factors (II, VII, IX, X, and particularly XIa) remaining in high concentrations in intravenous immunoglobulin (IVIG) preparations can form thrombi, causing thromboembolic events, and in serious cases, result in death. Therefore, manufacturers of biological products must investigate the ability of their production processes to remove procoagulant activities. Previously, we were able to remove coagulation factors II, VII, IX, and X from our IVIG preparation through ethanol precipitation, but factor XIa, which plays an important role in thrombosis, remained in the intermediate products. Here, we used a chromatographic process using a new resin that binds with high capacity to IgG and removes procoagulant activities. The procoagulant activities were reduced to low levels as determined by the thrombin generation assay: 250 s, FXI/FXIa ELISA: <0.31 ng/mL. Even after spiking with FXIa at a concentration 32.5 times higher than the concentration in normal specimens, the procoagulant activities were below the detection limit (<0.31 ng/mL). These results demonstrate the ability of our manufacturing process to remove procoagulant activities to below the detection limit (except by NaPTT), suggesting a reduced risk of thromboembolic events that maybe potentially caused by our IVIG preparation. Copyright © 2016 The Author(s). Published by Elsevier Ltd.. All rights reserved.

9 CFR 327.9 - Burlap wrapping for foreign meat.

Science.gov (United States)

2010-01-01

... 9 Animals and Animal Products 2 2010-01-01 2010-01-01 false Burlap wrapping for foreign meat. 327... AGRICULTURE AGENCY ORGANIZATION AND TERMINOLOGY; MANDATORY MEAT AND POULTRY PRODUCTS INSPECTION AND VOLUNTARY INSPECTION AND CERTIFICATION IMPORTED PRODUCTS § 327.9 Burlap wrapping for foreign meat. Burlap shall not be...

Two girls with a de novo Xq rearrangement of paternal origin: t(X;9(q24;q12 or rea(Xdup q

Directory of Open Access Journals (Sweden)

Ana I. Vásquez-Velásquez

2016-04-01

Full Text Available Objective: We report on two rare Xq rearrangements, namely a t(X;9(q24;q12 found in a mildly-affected girl (Patient 1 and a rea(Xdup q concomitant with a rob(14;21mat in a Down syndrome girl (Patient 2. Case report: Both rearrangements were characterized by banding techniques [Giemsa (G, constitutive heterochromatin (C, and bromodeoxyuridine (BrdU pulse], fluorescence in situ hybridization (FISH assays, human androgen receptor (HUMAR assays, and microarray analyses. Patient 1 had a t(X;9(q24;q12dn. Patient 2 had a de novo rea(X(qter→q23 or q24::p11.2→qter concomitant with an unbalanced rob(14;21mat. X-Inactivation studies in metaphases and DNA revealed a fully skewed inactivation: the normal homolog was silenced in Patient 1 and the rea(X in Patient 2. Both rearranged X chromosomes were of paternal descent. Microarray analyses revealed no imbalances in Patient 1 whereas loss of Xp (∼52 Mb and duplication of Xq (∼44 Mb and 21q were confirmed in Patient 2. Conclusion: Our observations further document the cytogenetic heterogeneity and predominant paternal origin of certain de novo X-chromosome rearrangements.

An X-Ray Luminous, Dwarf Seyfert Companion of Markarian 273 (ApJ, 496, L9 [1998])

Science.gov (United States)

Xia, X.-Y.; Boller, Th.; Wu, H.; Deng, Z.-G.; Gao, Y.; Zou, Z.-L.; Mao, S.; Börner, G.

1998-11-01

In the Letter ``An X-Ray Luminous, Dwarf Seyfert Companion of Markarian 273'' by X.-Y. Xia, Th. Boller, H. Wu, Z.-G. Deng, Y. Gao, Z.-L. Zou, S. Mao, and G. Börner (ApJ, 496, L9 [1998]), an observational error occurred that invalidates some of our conclusions. Since Mrk 273x was essentially invisible (B~21) in our acqusition image, in order to position the slit on the faint Mrk 273x, a slit rotation had to be applied. Unfortunately, the amount of rotation was applied incorrectly. As a result, the spectrum obtained (shown in Fig. 2) was not for the intended target, Mrk 273x, but for an object very close to, but northeast of, Mrk 273. A new spectrum of Mrk 273x indicates that Mrk 273x is at redshift 0.458, not at 0.0378 as quoted in the Letter. The larger redshift implies that both the optical and X-ray luminosity have to be revised upward by a factor of ~170. Mrk 273x is therefore not a dwarf galaxy optically. The X-ray properties of Mrk 273x remain the same except that its soft X-ray luminosity now reaches ~1044 ergs s-1 for H0=50 km s-1 Mpc-1. The new observations will be presented in a subsequent paper (X.-Y. Xia et al., in preparation [1998]) in order to make corrections and shed further insights on the objects in the Mrk 273 field.

Comparative analysis of synthesis and characterization of La_0_,_9Sr_0_,_1O_3 via sol-gel and combustion reaction

International Nuclear Information System (INIS)

Tarrago, D.P.; Haeser, G.S.; Malfatti, C.F.; Sousa, V.C.

2011-01-01

Strontium doped lanthanum manganites (LSM) are potential materials for cathode application in solid oxide fuel cells (SOFC) due to their properties and compatibility with yttria stabilized zirconia. In this work a LSM powder obtained by the sol-gel process is compared others previously obtained combustion synthesis using urea or sucrose as fuel. For the synthesis of LSM the nitrates of lanthanum, strontium and manganese were dissolved in citric acid and ethylene glycol forming a gel that was calcinated at 800 deg C. Both methods allowed the synthesis of a single phase powder, according to the X-ray diffraction patterns. Through gas adsorption it was found a specific surface area of 17m²/g, an intermediary value among the combustion synthesized powders. Scanning electron microscopy (SEM) revealed more compact agglomerates in the sol-gel powder, however, the transmission electron microscope (TEM) showed smaller and more uniform particles in this powder. (author)

Microstructure and mechanical properties of Sn-9Zn-xAl{sub 2}O{sub 3} nanoparticles (x=0–1) lead-free solder alloy: First-principles calculation and experimental research

Energy Technology Data Exchange (ETDEWEB)

Xing, Wen-qing; Yu, Xin-ye; Li, Heng; Ma, Le; Zuo, Wei [Taiyuan University of Technology, College of Material Science and Technology, Taiyuan 030024 (China); Dong, Peng; Wang, Wen-xian [Taiyuan University of Technology, College of Material Science and Technology, Taiyuan 030024 (China); Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan 030024 (China); Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024 (China); Ding, Min, E-mail: dingmin@tyut.edu.cn [Taiyuan University of Technology, College of Material Science and Technology, Taiyuan 030024 (China); Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan 030024 (China); Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024 (China)

2016-12-15

This paper studies microstructure and mechanical properties of Sn-9Zn-x Al{sub 2}O{sub 3} nanoparticles (x=0–1) lead-free solder alloy. The interface structure, interface energy and electronic properties of Al{sub 2}O{sub 3}/Sn9Zn interface are investigated by first-principle calculation. On the experimental part, in comparison with the plain Sn-9Zn solder, the Al{sub 2}O{sub 3} nanoparticles incorporated into the solder matrix can inhibit the growth of coarse dendrite Sn-Zn eutectic structure and refine grains of the composite solders during the solidification process of the alloys. Moreover, the microhardness and average tensile strength of the solders with addition of Al{sub 2}O{sub 3} nanoparticles increased with the increasing weight percentages of Al{sub 2}O{sub 3} nanoparticles. These improved mechanical properties can be attributed to the microstructure developments and the dispersed Al{sub 2}O{sub 3} nanoparticles.

Relationship Between Equilibrium Hydrogen Pressure and Exchange Current for the Hydrogen Electrode-Reaction at Mmni(3.9-X)Mn(0.4)A1(X)Co(0.7) Alloy Electrodes

NARCIS (Netherlands)

Senoh, H.; Morimoto, K.; Inoue, H.; Iwakura, C.; Notten, P.H.L.

2000-01-01

We present a theoretical relationship between equilibrium hydrogen pressure and exchange current for the hydrogen electrode reaction which considers the degree of hydrogen coverage at the electrode surface. Electrochemical measurements at MmNi3.9–xMn0.4AlxCo0.7 (0 x 0.8) electrodes were performed to

Swift/BAT and RXTE Observations of the Peculiar X-ray Binary 4U 2206+54 - Disappearance of the 9.6 Day Modulation

Science.gov (United States)

Corbet, R. H. D.; Markwardt, C.; Tueller, J.

2007-01-01

Observations of the high-mass X-ray binary 4U 2206+54 with the Swift Burst Alert Telescope (BAT) do not show modulation at the previously reported period of 9.6 days found from observations made with the Rossi X-ray Timing Explorer (RXTE) All-Sky Monitor (ASM). Instead, the strongest peak in the power spectrum of the BAT light curve occurs at a period of 19.25+/-0.08 days, twice the period found with the RXTE ASM. The maximum of the folded BAT light curve is also delayed compared to the maximum of the folded ASM light curve. The most recent ASM data folded on twice the 9.6 day period show 'similar morphology to the folded BAT light curve. This suggests that the apparent period doubling is a recent secular change rather than an energy-dependent effect. The 9.6 day period is thus not a permanent strong feature of the light curve. We suggest that the orbital period of 4U 2206+54 may be twice the previously proposed value.

3,3'-[(E-eten-1,2-diil]di(9-heksil-9H-karbazol bileşiğinin sentezi, X-ışını yapı tayini ve teorik yapı tahmini

Directory of Open Access Journals (Sweden)

Erol Asker

2016-08-01

Full Text Available 3,3'-[(E-eten-1,2-diil]di(9-heksil-9H-karbazol bileşiği 9H-karbazoldan çıkarak üç basamakta sentezlenmiş ve yapısı spektroskopik yöntemlerle aydınlatılmıştır. Kristal yapısı monoklinik uzay grubu P21/c'de çözülmüş ve geometrik özellikleri yarı-deneysel PM7 ve teorik DFT/B3LYP hesaplamalarla elde edilen verilerle karşılaştırılmıştır. DFT hesapsal sonuçlar ile X-ışını kırınımı deneysel sonuçlar arasında yüksek korelasyon belirlenmiştir. Kristal yapıdaki moleküller arası etkileşimler hesaplanan öncü orbitallerle açıklanmaya çalışılmıştır.

Assessment of Siemens plessey electronic personal dosimeter

International Nuclear Information System (INIS)

Hirning, C.R.; Lopez, S.; Yuen, P.S.

1994-01-01

This report presents the results of a laboratory assessment of the performance of a new type of personal dosimeter. The Electronic Personal Dosimeter, or EPD, was developed jointly by the National Radiological Protection Board and Siemens Plessey Controls Limited, both of the United Kingdom. Twenty pre-production units of the EPD and a reader were purchased by Ontario Hydro for the assessment. The tests were conducted jointly by Ontario Hydro's Health and Safety Division and AECL Research's Chalk River Laboratories (CRL), with funding from the Candu Owner's Group. A total of 26 tests were conducted, divided between Ontario Hydro and AECL. The test results were compared with the relevant requirements of three standards. In general, the performance of the EPD was found to be quite acceptable. It met most of the relevant requirements of the three standards and most of the design specifications. However, the following deficiencies were found: slow response time; sensitivity to high-frequency EMF; poor resistance to dropping; and an alarm that is not loud enough. In addition, the response of the EPD to low-energy beta rays may be too low for some applications. There were serious problems with the reliability of operation of the pre production EPDs used in these tests. 9 refs., 34 tabs., 20 figs

Assessment of Siemens plessey electronic personal dosimeter

Energy Technology Data Exchange (ETDEWEB)

Hirning, C R; Lopez, S [Ontario Hydro, Toronto, ON (Canada); Yuen, P S [Atomic Energy of Canada Ltd., Chalk River, ON (Canada). Chalk River Nuclear Labs.

1994-01-01

This report presents the results of a laboratory assessment of the performance of a new type of personal dosimeter. The Electronic Personal Dosimeter, or EPD, was developed jointly by the National Radiological Protection Board and Siemens Plessey Controls Limited, both of the United Kingdom. Twenty pre-production units of the EPD and a reader were purchased by Ontario Hydro for the assessment. The tests were conducted jointly by Ontario Hydro`s Health and Safety Division and AECL Research`s Chalk River Laboratories (CRL), with funding from the Candu Owner`s Group. A total of 26 tests were conducted, divided between Ontario Hydro and AECL. The test results were compared with the relevant requirements of three standards. In general, the performance of the EPD was found to be quite acceptable. It met most of the relevant requirements of the three standards and most of the design specifications. However, the following deficiencies were found: slow response time; sensitivity to high-frequency EMF; poor resistance to dropping; and an alarm that is not loud enough. In addition, the response of the EPD to low-energy beta rays may be too low for some applications. There were serious problems with the reliability of operation of the pre production EPDs used in these tests. 9 refs., 34 tabs., 20 figs.

Automatic attenuator upgrade for a Siemens D500 diffractometer via a generic software library to overcome hardware limitations

International Nuclear Information System (INIS)

Mayr, Sina; Randau, Christian; Kreuzpaintner, Wolfgang

2017-01-01

A proxy software was developed which allows the Siemens D500 x-ray diffractometer to be upgraded with add-ons that have never been officially available for it. For demonstration, we designed and integrated an automatic attenuator option and demonstrated the feasibility of our upgrade path by typical comparative x-ray measurements, which would usually saturate the x-ray detector, if no attenuator is used.

Automatic attenuator upgrade for a Siemens D500 diffractometer via a generic software library to overcome hardware limitations

Energy Technology Data Exchange (ETDEWEB)

Mayr, Sina, E-mail: sina.mayr@frm2.tum.de [Technische Universität München, Physik-Department E21, James-Franck-Str. 1, 85748 Garching (Germany); Randau, Christian [Georg-August-Universität Göttingen, Fakultät für Geowissenschaften und Geologie, Abteilung Isotopengeologie Außenstelle MLZ (FRM II), Lichtenbergstr. 1, 85748 Garching (Germany); Kreuzpaintner, Wolfgang [Technische Universität München, Physik-Department E21, James-Franck-Str. 1, 85748 Garching (Germany)

2017-05-21

A proxy software was developed which allows the Siemens D500 x-ray diffractometer to be upgraded with add-ons that have never been officially available for it. For demonstration, we designed and integrated an automatic attenuator option and demonstrated the feasibility of our upgrade path by typical comparative x-ray measurements, which would usually saturate the x-ray detector, if no attenuator is used.

Electrochemical Activity of a La0.9Ca0.1Co1−xFexO3 Catalyst for a Zinc Air Battery Electrode

Directory of Open Access Journals (Sweden)

Seungwook Eom

2015-01-01

Full Text Available The optimum composition of cathode catalyst has been studied for rechargeable zinc air battery application. La0.9Ca0.1Co1−xFexO3  (x=0–0.4 perovskite powders were prepared using the citrate method. The substitution ratio of Co2+ with Fe3+ cations was controlled in the range of 0–0.4. The optimum substitution ratio of Fe3+ cations was determined by electrochemical measurement of the air cathode composed of the catalyst, polytetrafluoroethylene (PTFE binder, and Vulcan XC-72 carbon. The substitution by Fe enhanced the electrochemical performances of the catalysts. Considering oxygen reduction/evolution reactions and cyclability, we achieved optimum substitution level of x=0.1 in La0.9Ca0.1Co1−xFexO3.

Discovery of an Energetic Pulsar Associated with SNR G76.9+1.0

Science.gov (United States)

Arzoumanian, Zaven; Gotthelf, E. V.; Ransom, S. M.; Safi-Harb, S.; Kothes, R.; Landecker, T. L.

2012-01-01

We report the discovery of PSR J2022-pulsar in the supernova remnant G76.9+i.0, in observations with the Chandra X-ray telescope, the Robert C. Byrd Green Bank Radio Telescope, and the Rossi X-ray Timing Explorer (RXTE). The pulsar's spin-down rate implies a rotation-powered luminosity E = 1.2 X 10(exp 38) erg/s, a surface dipole magnetic field strength B(sub S), = 1.0 X 10(exp 12) G, and a characteristic age of 8.9 kyr. PSR J2022+3842 is thus the second-most energetic Galactic pulsar known, after the Crab, as well as the most rapidly-rotating young, radio-bright pulsar known. The radio pulsations are highly dispersed and broadened by interstellar scattering, and we find that a large (delta f/f approximates 1.9 x 10(exp -6)) spin glitch must have occurred between our discovery and confirmation observations. The X-ray pulses are narrow (0.06 cycles FWHM) and visible up to 20 keV, consistent with magnetospheric emission from a rotation-powered pulsar. The Chandra X-ray image identifies the pulsar with a hard, unresolved source at the midpoint of the double-lobed radio morphology of G76.9+ 1.0 and embedded within faint, compact X-ray nebulosity. The spatial relationship of the X-ray and radio emissions is remarkably similar to extended structure seen around the Vela pulsar. The combined Chandra and RXTE pulsar spectrum is well-fitted by an absorbed power-law model with column density N(sub H) = (1.7 +/- 0.3) x 10(exp 22) / sq cm and photon index Gamma = 1.0 +/- 0.2; it implies that the Chandra point-source flux is virtually 100% pulsed. For a distance of 10 kpc, the X-ray luminosity of PSR J2022+3842 is L(sub x){2-1O keV) = 7.0 x 10(exp 33) erg/s. Despite being extraordinarily energetic, PSR J2022+3842 lacks a bright X-ray wind nebula and has an unusually low conversion efficiency of spin-down power to X-ray luminosity, Lx/E = 5.9 X 10(exp-5).

Title IX Resource Guide

Science.gov (United States)

Office for Civil Rights, US Department of Education, 2015

2015-01-01

Title IX of the Education Amendments of 1972 (Title IX) prohibits discrimination based on sex in education programs and activities in federally funded schools at all levels. If any part of a school district or college receives any Federal funds for any purpose, all of the operations of the district or college are covered by Title IX. The essence…

Expanding CRISPR/Cas9 Genome Editing Capacity in Zebrafish Using SaCas9

OpenAIRE

Feng, Yan; Chen, Cheng; Han, Yuxiang; Chen, Zelin; Lu, Xiaochan; Liang, Fang; Li, Song; Qin, Wei; Lin, Shuo

2016-01-01

The type II CRISPR/Cas9 system has been used widely for genome editing in zebrafish. However, the requirement for the 5′-NGG-3′ protospacer-adjacent motif (PAM) of Cas9 from Streptococcus pyogenes (SpCas9) limits its targeting sequences. Here, we report that a Cas9 ortholog from Staphylococcus aureus (SaCas9), and its KKH variant, successfully induced targeted mutagenesis with high frequency in zebrafish. Confirming previous findings, the SpCas9 variant, VQR, can also induce targeted mutation...

Impedance spectroscopy of SrBi2Ta2O9 and SrBi2Nb2O9 ceramics correlation with fatigue behavior

International Nuclear Information System (INIS)

Chen, T.; Thio, C.; Desu, S.B.

1997-01-01

In this research, a fatigue model for ferroelectric materials is proposed. The reasons for the electrical fatigue resistance of SrBi 2 Ta 2 O 9 (SBT), SrBi 2 Nb 2 O 9 (SBN), and PbZr 1-x Ti x O 3 (PZT) are discussed in terms of the bulk ionic conductivities of the compounds. To obtain the bulk ionic conductivity of SBT and SBN, we have used impedance spectroscopy which provides an effective method that allows us to separate the individual contributions of bulk, grain boundaries, and electrode-ferroelectric interfaces from the total capacitor impedance. The bulk ionic conductivities of SBT and SBN (∼10 -7 S/cm) are much higher than those of the perovskite ferroelectrics, e.g., PZT (∼10 -11 -10 -10 S/cm). The high ionic conductivities led us to conclude that the good fatigue resistance of SrBi 2 Ta 2 O 9 and SrBi 2 Nb 2 O 9 is due to easy recovery of defects. Specifically, oxygen vacancies entrapped within the capacitors are easily released, resulting in limited space charge buildup and domain wall pinning during the polarization reversal process. However, the oxygen vacancies in PZT are trapped at trap sites to become space charges, resulting in capacitor fatigue. copyright 1997 Materials Research Society

Preparation of human Melanocortin-4 receptor agonist libraries: linear peptides X-Y-DPhe7-Arg8-Trp(or 2-Nal)9-Z-NH2.

Science.gov (United States)

Cheung, Adrian Wai-Hing; Qi, Lida; Gore, Vijay; Chu, Xin-Jie; Bartkovitz, David; Kurylko, Grazyna; Swistok, Joseph; Danho, Waleed; Chen, Li; Yagaloff, Keith

2005-12-15

Two libraries of hMC4R agonists, X-Y-DPhe(7)-Arg(8)-2-Nal(9)-Z-NH(2) and X-Y-DPhe(7)-Arg(8)-Trp(9)-Z-NH(2), totaling 185 peptides were prepared using Irori radiofrequency tagging technology and Argonaut Quest 210 Synthesizer, where X stands for N-caps, Y for His(6) surrogates and Z for Gly(10) surrogates. As a result of this study, His-modified pentapeptides with Trp were found to be more hMC4R potent than the corresponding 2-Nal analogs, novel N-caps and Gly surrogates were identified and 19 new peptides which are potent hMC4R agonists (EC(50) 1-15nM) and selective against hMC1R were discovered.

CA 19-9 in the diagnosis and differential diagnosis of exocrine pancreatic carcinoma

International Nuclear Information System (INIS)

Klapdor, R.; Lehmann, U.; Bahlo, M.; Greten, H.; Ackeren, H. v.; Dallek, M.; Schreiber, W.H.

1983-01-01

CA 19-9 serum concentrations were determined in 56 controls and 66 patients with various pancreatic diseases using a commercially available radioimmunoassay. 56 controls showed mean serum concentrations of 7.3 +- 9.6 U/ml (anti x +- 2 SD) range 0-24, median 6), n = 21 patients suffering from chronic pancreatitis mean values of 16 +- 24 U/ml (anti x +- 2 SD) (range 4.9-42, median 13). The majority of the patients with exocrine pancreatic carcinoma demonstrated significantly elevated values: in 91% and 82% respectively, CA 19-9 levels were elevated above the upper limit of 95% of the controls (> 15 U/ml) and of the patients with chronic pancreatitis (> 37 U/ml) (P [de

Crystal structures and electronic properties of UTixNb3-xO10 (x=0,1/3,1) and of the intercalation compound Li0.9UTiNb2O10

International Nuclear Information System (INIS)

Dickens, P.G.; Flynn, G.J.; Patat, S.; Stuttart, G.P.

1997-01-01

Complete crystal structures of the related phases UTi x Nb 3-x O 10 (x=0,1/3,1) and of the intercalation compound Li 0.9 UTiNb 2 O 10 have been determined by Rietveld analysis of room-temperature powder neutron diffraction data. The new structural data combined with magnetic susceptibility measurements made in the range 5 y 1 U V 1+y-x U VI x-y Ti IV x Nb V 3-x O 10 (y≤ x ≤1) with U V (f 1 ) being the only paramagnetic species present. (Author)

Siemens meelitab Eestisse 150 töökohta / Raigo Neudorf

Index Scriptorium Estoniae

Neudorf, Raigo

2002-01-01

Saksamaa elektroonikafirma Siemens tütarfirma Eestis võistleb selle eest, et tuua Eestisse emafirma 150 pakutavat töökohta majandustarkvara koostavatele spetsialistidele. Tabelid: Siemens Grupp Eesti tähtsamad majandusnäitajad. Siemensi kontsern

Numerical investigation towards a HiTAC condition in a 9MW heavy fuel-oil boiler

NARCIS (Netherlands)

Zhu, Shanglong; Venneker, Bart; Roekaerts, Dirk; Pozarlik, Artur; van der Meer, Theo

2013-01-01

In this study, several conditions in a 9 MW heavy fuel-oil boiler were numerically studied in order to get a better understanding of the application of HiTAC in such a boiler. Simulations were done with an Euler- Lagrange approach. The Eddy Dissipation model was used for combustion. Simulation

The lower cranial nerves: IX, X, XI, XII.

Science.gov (United States)

Sarrazin, J-L; Toulgoat, F; Benoudiba, F

2013-10-01

The lower cranial nerves innervate the pharynx and larynx by the glossopharyngeal (CN IX) and vagus (CN X) (mixed) nerves, and provide motor innervation of the muscles of the neck by the accessory nerve (CN XI) and the tongue by the hypoglossal nerve (CN XII). The symptomatology provoked by an anomaly is often discrete and rarely in the forefront. As with all cranial nerves, the context and clinical examinations, in case of suspicion of impairment of the lower cranial nerves, are determinant in guiding the imaging. In fact, the impairment may be located in the brain stem, in the peribulbar cisterns, in the foramens or even in the deep spaces of the face. The clinical localization of the probable seat of the lesion helps in choosing the adapted protocol in MRI and eventually completes it with a CT-scan. In the bulb, the intra-axial pathology is dominated by brain ischemia (in particular, with Wallenberg syndrome) and multiple sclerosis. Cisternal pathology is tumoral with two tumors, schwannoma and meningioma. The occurrence is much lower than in the cochleovestibular nerves as well as the leptomeningeal nerves (infectious, inflammatory or tumoral). Finally, foramen pathology is tumoral with, outside of the usual schwannomas and meningiomas, paragangliomas. For radiologists, fairly hesitant to explore these lower cranial pairs, it is necessary to be familiar with (or relearn) the anatomy, master the exploratory technique and be aware of the diagnostic possibilities. Copyright © 2013 Éditions françaises de radiologie. Published by Elsevier Masson SAS. All rights reserved.

Nb/sub 2/Te/sub 2/O/sub 9/ and Ta/sub 2/Te/sub 2/O/sub 9/: Two new mixed oxides of Te(IV)

International Nuclear Information System (INIS)

Gaitan, M.; Jerez, A.; Pico, C.; Veiga, M.L.

1987-01-01

Nb/sub 2/Te/sub 2/O/sub 9/ and Ta/sub 2/Te/sub 2/O/sub 9/ were prepared by solid state reactions between amorphous TeO/sub 3/(s) and metallic pentoxides of Nb and Ta. A crystallographic analysis carried out by X-ray diffraction showed that these compounds are isostructural (space group: P2/sub 1//C. a = 6.883 A, b = 7.853 A, c = 14.591 A, β = 103.66 for Nb/sub 2/Te/sub 2/O/sub 9/ and a = 7.10 A, b = 7.48 A, c = 14.62 A, β = 102.9 for Ta/sub 2/Te/sub 2/O/sub 9/). The IR spectra and thermal decomposition processes of both mixed oxides were studied

Brachytherapy model with sodium pertechnetate-"9"9"mTc balloon (Na"9"9"mTcO_4"-) for breast cancer: evaluation of dosimetry and cell response

International Nuclear Information System (INIS)

Lima, Carla Flavia de

2016-01-01

Breast cancer is the most common type of cancer that affects more women worldwide. Among various treatment options, radiotherapy which is often used as a treatment for locoregional recurrences control or to decrease tumor size. In patients with breast cancer at an early stage, a booster dose (boost) in the primary tumor area can be applied after conventional radiation therapy. There are several drawbacks to applying this technique. In this work we aimed to perform a dosimetric analysis in a breast model, where it put a balloon filled with sodium pertechnetate-"9"9"mTc (Na"9"9"mTcO_4"-) which in future could be used in preference to other possible therapies. The methodology involved the development of dosimetry in water based on radiochromic films and in a computational voxel thorax model. Calibration protocol achieved a mathematical relation between absorbed dose versus optical density (OD) measured at a set of radiochromic sample films placed at the surface of the balloon plus 1 cm up to 10 cm far, in which theoretical dose values were provided by MCNP modeling, reproducing the water equivalent physical simulator. A voxel model of a female thorax, developed at the SISCODES/MCNP codes, received a filled balloon inside. Spatial dose distribution was generated, illustrating the dose received in the chest wall, glandular tissue, breast skin and lung. The dosimetric findings contribute to present the Na"9"9"mTcO_4"- balloon modality which provides a suitable spatial dose distribution in the tumor bed preserving adjacent health tissues. We also studied the radiobiological response radio resistant mammary adenocarcinoma cells (MDAMB231) by exposure of these cells to Na"9"9"mTcO_4"- balloon. The findings include the presence of apoptotic cells in the balloon around point out a favorable response. In conclusion, the balloon may represent a viable option in the supplementary therapy of breast cancer in patients who have appropriate indication. Irradiation with Na"9"9"mTcO_4

The PHWR of Siemens as appropriate type of the SMPR-class

International Nuclear Information System (INIS)

Herzog, G.; Doerfler, U.; Loos, F.

1988-01-01

Siemens started its NPP-activities with the development and construction of a number of small and medium size power reactor (SMPR) plants, using different reactor types (PHWRs, PWRs and BWRs). Siemens applied its proven technological modules successfully to all types of nuclear power plants as it is demonstrated by the high availability figures published every year. Based on the experience gained from Atucha I and II, the Argentinian engineering company ENACE (of which KWU holds 25% of the shares) has developed the ARGOS 380, a NPP in the SMPR-class, as an advanced continuation of the KWU PHWR series. The technology transfer provided by Siemens in the course of NPP construction includes all activities in the engineering, construction, manufacturing and erection/commissioning field. Additionally Siemens is prepared to assist in the transfer of manufacturing know-how. On the basis of its successful activities in this field for years, Siemens disposes of all instruments for an efficient know-how transfer. (orig.)

Characterization and tissue distribution of Lhx9 and Lhx9α in ...

Indian Academy of Sciences (India)

Based on a partial sequence from our laboratory transcrip- .... Lhx9α. The Lhx9 and Lhx9α mRNA values were normalized to the β-actin transcript level. The data were .... homeodomain transcription factors via recruitment of the histone.

IGSF9 Family Proteins

DEFF Research Database (Denmark)

Hansen, Maria; Walmod, Peter Schledermann

2013-01-01

The Drosophila protein Turtle and the vertebrate proteins immunoglobulin superfamily (IgSF), member 9 (IGSF9/Dasm1) and IGSF9B are members of an evolutionarily ancient protein family. A bioinformatics analysis of the protein family revealed that invertebrates contain only a single IGSF9 family gene......, the longest isoforms of the proteins have the same general organization as the neural cell adhesion molecule family of cell adhesion molecule proteins, and like this family of proteins, IGSF9 family members are expressed in the nervous system. A review of the literature revealed that Drosophila Turtle...... facilitates homophilic cell adhesion. Moreover, IGSF9 family proteins have been implicated in the outgrowth and branching of neurites, axon guidance, synapse maturation, self-avoidance, and tiling. However, despite the few published studies on IGSF9 family proteins, reports on the functions of both Turtle...

Effect of synthesis conditions on the nanopowder properties of Ce{sub 0.9}Zr{sub 0.1}O{sub 2}

Energy Technology Data Exchange (ETDEWEB)

Zimicz, M.G.; Fabregas, I.O.; Lamas, D.G. [CINSO (Centro de Investigaciones en Solidos) CONICET-CITEFA J.B. de La Salle 4397, 1603 Villa Martelli, Pcia. de Buenos Aires (Argentina); Larrondo, S.A., E-mail: susana@di.fcen.uba.ar [Laboratorio de Procesos Cataliticos, Departamento de Ingenieria Quimica, Facultad de Ingenieria, Universidad de Buenos Aires, Pabellon de Industrias, Ciudad Universitaria, 1428 Buenos Aires (Argentina)

2011-06-15

Graphical abstract: . The synthesis of nanocrystalline Ce{sub 0.9}Zr{sub 0.1}O{sub 2} powders via the gel-combustion method, using different fuels, and following either stoichiometric or non-stoichiometric pH-controlled routes is investigated. Research highlights: {yields} All samples exhibited the fluorite-type crystal structure, nanometric average crystallite size and negligible carbon content. {yields} Synthesis conditions strongly affect the average crystallite size, the degree of agglomeration, the specific surface area and the pore volume. {yields} Our results indicate that, by controlling the synthesis conditions it is possible to obtain solids with custom-made morphological properties. -- Abstract: In this work, the synthesis of nanocrystalline Ce{sub 0.9}Zr{sub 0.1}O{sub 2} powders via the gel-combustion method, using different fuels, and following either stoichiometric or non-stoichiometric pH-controlled routes is investigated. The objective is to evaluate the effect of synthesis conditions on the textural and morphological properties, and the crystal structure of the synthesized materials. The solids were characterized by nitrogen physisorption, Scanning Electron Microscopy (SEM), X-ray powder diffraction (XPD), and Carbon-Hydrogen-Nitrogen Elemental Analysis (CHN). All the powders exhibited nanometric crystallite size, fluorite-type structure and negligible carbon content. Synthesis conditions strongly affect the average crystallite size, the degree of agglomeration, the specific surface area and the pore volume. Our results indicate that, by controlling the synthesis conditions it is possible to obtain solids with custom-made morphological properties.

The ionic conductivity and local environment of cations in Bi9ReO17

International Nuclear Information System (INIS)

Thompson, M.; Herranz, T.; Santos, B.; Marco, J.F.; Berry, F.J.; Greaves, C.

2010-01-01

The influence of temperature on the structure of Bi 9 ReO 17 has been investigated using differential thermal analysis, variable temperature X-ray diffraction and neutron powder diffraction. The material undergoes an order-disorder transition at ∼1000 K on heating, to form a fluorite-related phase. The local environments of the cations in fully ordered Bi 9 ReO 17 have been investigated by Bi L III - and Re L III -edge extended X-ray absorption fine structure (EXAFS) measurements to complement the neutron powder diffraction information. Whereas rhenium displays regular tetrahedral coordination, all bismuth sites show coordination geometries which reflect the importance of a stereochemically active lone pair of electrons. Because of the wide range of Bi-O distances, EXAFS data are similar to those observed for disordered structures, and are dominated by the shorter Bi-O bonds. Ionic conductivity measurements indicate that ordered Bi 9 ReO 17 exhibits reasonably high oxide ion conductivity, corresponding to 2.9x10 -5 Ω -1 cm -1 at 673 K, whereas the disordered form shows higher oxide ion conductivity (9.1x10 -4 Ω -1 cm -1 at 673 K). - Graphical abstract: The structure of Bi 9 ReO 17 is discussed and related to the ionic conductivity of the ordered and disordered forms.

Characterization of Oxy-combustion Impacts in Existing Coal-fired Boilers

Energy Technology Data Exchange (ETDEWEB)

Adams, Bradley [Univ. of Utah, Salt Lake City, UT (United States); Davis, Kevin [Univ. of Utah, Salt Lake City, UT (United States); Senior, Constance [Univ. of Utah, Salt Lake City, UT (United States); Shim, Hong Shim [Univ. of Utah, Salt Lake City, UT (United States); Otten, Brydger Van [Univ. of Utah, Salt Lake City, UT (United States); Fry, Andrew [Univ. of Utah, Salt Lake City, UT (United States); Wendt, Jost [Univ. of Utah, Salt Lake City, UT (United States); Eddings, Eric [Univ. of Utah, Salt Lake City, UT (United States); Paschedag, Alan [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Shaddix, Christopher [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Cox, William [Brigham Young Univ., Provo, UT (United States); Tree, Dale [Brigham Young Univ., Provo, UT (United States)

2013-09-30

Reaction Engineering International (REI) managed a team of experts from University of Utah, Siemens Energy, Praxair, Vattenfall AB, Sandia National Laboratories, Brigham Young University (BYU) and Corrosion Management Ltd. to perform multi-scale experiments, coupled with mechanism development, process modeling and CFD modeling, for both applied and fundamental investigations. The primary objective of this program was to acquire data and develop tools to characterize and predict impacts of CO{sub 2} flue gas recycle and burner feed design on flame characteristics (burnout, NO{sub x}, SO{sub x}, mercury and fine particle emissions, heat transfer) and operational concerns (fouling, slagging and corrosion) inherent in the retrofit of existing coal-fired boilers for oxy-coal combustion. Experimental work was conducted at Sandia National Laboratories’ Entrained Flow Reactor, the University of Utah Industrial Combustion Research Facility, and Brigham Young University. Process modeling and computational fluid dynamics (CFD) modeling was performed at REI. Successful completion of the project objectives resulted in the following key deliverables: 1) Multi-scale test data from 0.1 kW bench-scale, 100 kW and 200 kW laboratory-scale, and 1 MW semi-industrial scale combustors that describe differences in flame characteristics, fouling, slagging and corrosion for coal combustion under air-firing and oxygen-firing conditions, including sensitivity to oxy-burner design and flue gas recycle composition. 2) Validated mechanisms developed from test data that describe fouling, slagging, waterwall corrosion, heat transfer, char burnout and sooting under coal oxy-combustion conditions. The mechanisms were presented in a form suitable for inclusion in CFD models or process models. 3) Principles to guide design of pilot-scale and full-scale coal oxy-firing systems and flue gas recycle configurations, such that boiler operational impacts from oxy-combustion retrofits are minimized. 4

77 FR 29633 - Alta Wind VII, LLC, Alta Wind IX, LLC, Alta Wind X, LLC, Alta Wind XI, LLC, Alta Wind XII, LLC...

Science.gov (United States)

2012-05-18

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. EL12-68-000] Alta Wind VII, LLC, Alta Wind IX, LLC, Alta Wind X, LLC, Alta Wind XI, LLC, Alta Wind XII, LLC, Alta Wind XIII, LLC, Alta Wind XIV, LLC, Alta Wind XV, LLC, Alta Windpower Development, LLC, TGP Development Company, LLC...

Three-peak behavior in giant magnetoimpedance effect in Fe73.5-x Cr x Nb3Cu1Si13.5B9 amorphous ribbons

International Nuclear Information System (INIS)

Rosales-Rivera, A.; Valencia, V.H.; Pineda-Gomez, P.

2007-01-01

A systematic study of the giant magnetoimpedance (GMI) effect in Fe 73.5- x Cr x Nb 3 Cu 1 Si 13.5 B 9 amorphous ribbons with x=0, 2, 4, 6, 8 and 10 is presented. The complex impedance in these compounds was measured for applied fields from -80 to 80 Oe at room temperature, via the so-called four-probe technique. Depending on the frequency, the experimentally observed GMI curves usually exhibit two types of behavior, namely single-peak (SP), and two-peak (TP). In this work, we emphasize the presence of a 'three-peak behavior' in GMI curves. It occurs between SP and TP behaviors. The mechanisms leading to the three-peak behavior are discussed

Impedance spectroscopy studies on lead free Ba1-xMgx(Ti0.9Zr0.1)O3 ceramics

Science.gov (United States)

Ben Moumen, S.; Neqali, A.; Asbani, B.; Mezzane, D.; Amjoud, M.; Choukri, E.; Gagou, Y.; El Marssi, M.; Luk'yanchuk, Igor A.

2018-06-01

Ba1-xMgx(Ti0.9Zr0.1)O3 (x = 0.01 and 0.02) ceramics were prepared using the conventional solid state reaction. Rietveld refinement performed on X-ray diffraction patterns indicates that the samples are tetragonal crystal structure with P4mm space group. By increasing Mg content from 1 to 2% the unit cell volume decreased. Likewise, the grains size is greatly reduced from 10 μm to 4 μm. The temperature dependence of dielectric constants at different frequencies exhibited typical relaxor ferroelectric characteristic, with sensitive dependence in frequency and temperature for ac conductivity. The obtained activation energy values were correlated to the proposed conduction mechanisms.

Synthesis and electrochemical properties of xLiMn0.9Fe0.1PO4·yLi3V2(PO4)3/C composite cathode materials for lithium–ion batteries

International Nuclear Information System (INIS)

Wu, Ling; Lu, JiaJia; Wei, Gui; Wang, Pengfei; Ding, Hao; Zheng, Junwei; Li, Xiaowei; Zhong, Shengkui

2014-01-01

Highlights: • xLiMn 0.9 Fe 0.1 PO4·yLi 3 V 2 (PO 4 ) 3 /C composites are prepared by a solid-state method. • The addition of Li 3 V 2 (PO 4 ) 3 can improve the properties of LiMn 0.9 Fe 0.1 PO 4 . • Mutual doping occurrs between the LiMn 0.9 Fe 0.1 PO 4 and Li 3 V 2 (PO 4 ) 3 phases. • 5LiMn 0.9 Fe 0.1 PO 4 ·Li 3 V 2 (PO 4 ) 3 /C shows the best electrochemical properties. - Abstract: The xLiMn 0.9 Fe 0.1 PO 4 ·yLi 3 V 2 (PO 4 ) 3 /C (x:y=1:0, 9:1 5:1, 3:1, 1:1 and 0:1) cathode materials are synthesized by a ball–milling and post–calcination method. XRD results reveal that the xLiMn 0.9 Fe 0.1 PO 4 ·yLi 3 V 2 (PO 4 ) 3 /C (x,y≠0) composites are composed of LiMn 0.9 Fe 0.1 PO 4 and Li 3 V 2 (PO 4 ) 3 phases, and no impurities are detected. In LiMn 0.9 Fe 0.1 PO 4 –Li 3 V 2 (PO 4 ) 3 system, most of the manganese, iron and vanadium elements in the raw materials tend to form the two major phases, and only small amounts of V, Mn and Fe as dopants enter into the lattice of LiMn 0.9 Fe 0.1 PO 4 and Li 3 V 2 (PO 4 ) 3 . Electrochemical tests show that the xLiMn 0.9 Fe 0.1 PO 4 ·yLi 3 V 2 (PO 4 ) 3 /C (x,y≠0) composites exhibit much better performance than the single LiMn 0.9 Fe 0.1 PO 4 /C. Among the samples, 5LiMn 0.9 Fe 0.1 PO 4 ·Li 3 V 2 (PO 4 ) 3 /C shows the best electrochemical performance. The sample delivers the specific capacities of 158.1, 140.7 and 100.2 mAh g −1 at 0.05, 1 and 4 C rates in the potential range of 2.5–4.5 V, and exhibits very long and flat discharge plateau around 4.0 V up to 1 C rate. The sample also shows good cycling performance at various C–rates

Circulating levels of matrix metalloproteinase-9 (MMP-9, neutrophil gelatinase-associated lipocalin (NGAL and their complex MMP-9/NGAL in breast cancer disease

Directory of Open Access Journals (Sweden)

Nonni Afroditi

2009-11-01

Full Text Available Abstract Background Recent evidence suggests that neutrophil gelatinase-associated lipocalin (NGAL expression is induced in many types of human cancer, while detection of its complex with matrix metalloproteinase-9 (MMP-9 is correlated with cancer disease status. We aim to evaluate the serum expression of MMP-9, NGAL and their complex (MMP-9/NGAL during the diagnostic work-up of women with breast abnormalities and investigate their correlation with disease severity. Methods The study included 113 women with non-palpable breast lesions undergoing vacuum-assisted breast biopsy for histological diagnosis, and 30 healthy women, which served as controls. Expression levels of MMP-9, NGAL and their complex MMP-9/NGAL were determined in peripheral blood samples with immunoenzymatic assays. Results Women with invasive ductal carcinoma exhibited significantly increased levels of MMP-9, NGAL and MMP-9/NGAL compared to healthy controls (MMP-9: p Conclusion These findings suggest that the serum measurement of MMP-9 and NGAL may be useful in non-invasively monitoring breast cancer progression, while supporting their potential role as early biomarkers of breast disease status.

Dimensionality of the 9-item Utrecht Work Engagement Scale (UWES-9).

Science.gov (United States)

de Bruin, Gideon P; Henn, Carolina M

2013-06-01

Despite wide-spread use, questions remain about the dimensionality of the 9-item Utrecht Work Engagement Scale (UWES-9). Theoretical underpinnings of the UWES-9 point toward a hierarchical structure with a general factor and three group or primary factors: Dedication, Vigor, and Absorption. To date, researchers have failed to model the general factor, which contributes to the lack of consensus about the dimensionality of the scale. Bi-factor analysis was used to demonstrate the presence of a very strong general factor and, in comparison, two weak group factors. The results shed additional light on the meaning of the work engagement construct. The implications for research with the UWES-9 are discussed.

Viscous behavior of (Sn61.9Pb38.1)100-xREx (x=0, 0.1, 0.3, 1 wt%) solder alloys

International Nuclear Information System (INIS)

Wu Yuqin; Bian Xiufang; Zhao Yan; Li Xuelian; Zhang Yanning; Tian Yongsheng; Lv Xiaoqian

2008-01-01

The viscous behavior of (Sn 61.9 Pb 38.1 ) 100-x RE x (x=0, 0.1, 0.3, 1 wt%) solder alloys has been investigated by a torsional oscillation viscometer. The structural transition temperature T ' increases with increasing addition of RE elements. Above T ' , the viscosities of melts increase with increasing addition of RE, and are fitted well with the Arrhenius equation. The time dependence of viscosity at the measured temperature below T ' follows the exponential relaxation function and reflects the process of the structural transition in the melt, which can be considered as the thermodynamic equilibrium process. The thermodynamic equilibrium relaxation time τ eq increases with both the equilibrium viscosity η eq and the discrepancy in viscosity (Δη), between the initial state and the equilibrium state. However, it decreases with the measured temperature T. The size of clusters in the melts increases with increasing of viscosity and is restricted by the thermodynamic equilibrium conditions

Investigation of the mechanical performance of Siemens linacs components during arc

DEFF Research Database (Denmark)

Rowshanfarzad, Pejman; Häring, Peter; Lynggaard Riis, Hans

2015-01-01

to linac rotation were separately investigated by acquisition of 37 EPID images of a simple phantom with five ball bearings at various gantry angles. A fast and robust software package was developed for automated analysis of image data. Three Siemens linacs were investigated. RESULTS: The average EPID sag...... for effective investigation of the behavior of Siemens linac components with gantry rotation. Such a comprehensive study has been performed for the first time on Siemens machines....

Frequency of MYO9B polymorphisms in celiac patients and controls Frecuencia de polimorfismos del gen MYO9B en pacientes celiacos y en sujetos controles

Directory of Open Access Journals (Sweden)

Tamara Loeff

2012-12-01

Full Text Available Introduction: the MYO9B gene contributes to the maintenance of the intestinal barrier and it has been postulated as a risk factor of celiac disease (CD. The objective of this study was to compare the frequency and association rs2305764, rs2305767and rs1457092 MYO09B polymorphisms in pediatric CD patients from Chile and Argentina. Patients and methods: the study was made in 104 CD pediatric patients (Chilean and Argentineans and 104 controls subjects. MYO9B gene polymorphisms were analyzed by Taqman allelic probes. We evaluated the Hardy-Weinberg equilibrium by means of Chi-square and compared the haplotypes distribution using Fisher test. Results: SNPs rs2305767 and rs1457092 were associated with celiac disease (CD; TT genotype in rs2305767 would be a protective factor (p Introducción: el gen miosina IX B (MYO9B participa en el mantenimiento de la barrera intestinal y se postula que puede aportar riesgo para desarrollar enfermedad celiaca (EC. El objetivo de este estudio fue comparar la frecuencia y la asociación de los polimorfismos rs 2305764, rs 2305767 y rs 1457092 del gen MYO9B en pacientes pediátricos con EC procedentes de Chile y Argentina. Pacientes y métodos: el estudio se realizó en 104 pacientes pediátricos con EC (chilenos y argentinos y en 104 sujetos controles. El análisis de los polimorfismos del gen MYO9B se realizó mediante ensayos Taqman de discriminación alélica. Se evalúo equilibrio de Hardy-Weinberg mediante Chi-cuadrado y comparación de haplotipos según prueba de Fisher. Resultados: los polimorfismos de un solo nucleótido (SNPs rs2305767 y rs1457092 mostraron asociación con la EC. El genotipo TT del rs2305767 sería un factor protector (p < 0,0001, OR = 0,19 IC 0,1-0,4 mientras que el genotipo CT sería un factor de riesgo (p < 0,0001, OR = 4,9 IC 2,2-11,3. En el rs1457092, el genotipo CC resultó también un factor protector frente a esta enfermedad (p < 0,0001, OR = 0,07 IC 0,0-0,3. Conclusión: nuestros

Energetic effects of ether and ketone functional groups in 9,10-dihydroanthracene compound

International Nuclear Information System (INIS)

Freitas, Vera L.S.; Gomes, Jose R.B.; Ribeiro da Silva, Maria D.M.C.

2010-01-01

The energetic effects caused by replacing one of the methylene groups in the 9,10-dihydroanthracene by ether or ketone functional groups yielding xanthene and anthrone species, respectively, were determined from direct comparison of the standard (p o = 0.1 MPa) molar enthalpies of formation in the gaseous phase, at T = 298.15 K, of these compounds. The experimental static-bomb combustion calorimetry and Calvet microcalorimetry and the computational G3(MP2)//B3LYP method were used to get the standard molar gas-phase enthalpies of formation of xanthene, (41.8 ± 3.5) kJ . mol -1 , and anthrone, (31.4 ± 3.2) kJ . mol -1 . The enthalpic increments for the substitution of methylene by ether and ketone in the parent polycyclic compound (9,10-dihydroanthracene) are -(117.9 ± 5.5) kJ . mol -1 and -(128.3 ± 5.4) kJ . mol -1 , respectively.

Matrix Metalloproteinase 9 (MMP-9 Regulates Vein Wall Biomechanics in Murine Thrombus Resolution.

Directory of Open Access Journals (Sweden)

Khanh P Nguyen

Full Text Available Deep venous thrombosis is a common vascular problem with long-term complications including post-thrombotic syndrome. Post-thrombotic syndrome consists of leg pain, swelling and ulceration that is related to incomplete or maladaptive resolution of the venous thrombus as well as loss of compliance of the vein wall. We examine the role of metalloproteinase-9 (MMP-9, a gene important in extracellular remodeling in other vascular diseases, in mediating thrombus resolution and biomechanical changes of the vein wall.The effects of targeted deletion of MMP-9 were studied in an in vivo murine model of thrombus resolution using the FVB strain of mice. MMP-9 expression and activity significantly increased on day 3 after DVT. The lack of MMP-9 impaired thrombus resolution by 27% and this phenotype was rescued by the transplantation of wildtype bone marrow cells. Using novel biomechanical techniques, we demonstrated that the lack of MMP-9 significantly decreased thrombus-induced loss of vein wall compliance. Biomechanical analysis of the contribution of individual structural components showed that MMP-9 affected the elasticity of the extracellular matrix and collagen-elastin fibers. Biochemical and histological analyses correlated with these biomechanical effects as thrombi of mice lacking MMP-9 had significantly fewer macrophages and collagen as compared to those of wildtype mice.MMP-9 mediates thrombus-induced loss of vein wall compliance by increasing stiffness of the extracellular matrix and collagen-elastin fibers during thrombus resolution. MMP-9 also mediates macrophage and collagen content of the resolving thrombus and bone-marrow derived MMP-9 plays a role in resolution of thrombus mass. These disparate effects of MMP-9 on various aspects of thrombus illustrate the complexity of individual protease function on biomechanical and morphometric aspects of thrombus resolution.

Matrix Metalloproteinase 9 (MMP-9) Regulates Vein Wall Biomechanics in Murine Thrombus Resolution

Science.gov (United States)

Nguyen, Khanh P.; McGilvray, Kirk C.; Puttlitz, Christian M.; Mukhopadhyay, Subhradip; Chabasse, Christine; Sarkar, Rajabrata

2015-01-01

Objective Deep venous thrombosis is a common vascular problem with long-term complications including post-thrombotic syndrome. Post-thrombotic syndrome consists of leg pain, swelling and ulceration that is related to incomplete or maladaptive resolution of the venous thrombus as well as loss of compliance of the vein wall. We examine the role of metalloproteinase-9 (MMP-9), a gene important in extracellular remodeling in other vascular diseases, in mediating thrombus resolution and biomechanical changes of the vein wall. Methods and Results The effects of targeted deletion of MMP-9 were studied in an in vivo murine model of thrombus resolution using the FVB strain of mice. MMP-9 expression and activity significantly increased on day 3 after DVT. The lack of MMP-9 impaired thrombus resolution by 27% and this phenotype was rescued by the transplantation of wildtype bone marrow cells. Using novel biomechanical techniques, we demonstrated that the lack of MMP-9 significantly decreased thrombus-induced loss of vein wall compliance. Biomechanical analysis of the contribution of individual structural components showed that MMP-9 affected the elasticity of the extracellular matrix and collagen-elastin fibers. Biochemical and histological analyses correlated with these biomechanical effects as thrombi of mice lacking MMP-9 had significantly fewer macrophages and collagen as compared to those of wildtype mice. Conclusions MMP-9 mediates thrombus-induced loss of vein wall compliance by increasing stiffness of the extracellular matrix and collagen-elastin fibers during thrombus resolution. MMP-9 also mediates macrophage and collagen content of the resolving thrombus and bone-marrow derived MMP-9 plays a role in resolution of thrombus mass. These disparate effects of MMP-9 on various aspects of thrombus illustrate the complexity of individual protease function on biomechanical and morphometric aspects of thrombus resolution. PMID:26406902

Measurement of K/sub NN/, K/sub LL/ in p vector d → n vector X and p vector 9Be → n vector X at 800 MeV

International Nuclear Information System (INIS)

Riley, P.J.; Hollas, C.L.; Newsom, C.R.

1980-01-01

The spin transfer parameters, K/sub NN/ and K/sub LL/, have been measured in p vector d → n vector X and p vector 9 Be → n vector X at 0 0 and 800 MeV. The rather large values of K/sub LL/ demonstrate that this transfer mechanism will provide a useful source of polarized neutrons at LAMPF energies

A Silicon d-spacing Mapping Measurement System With Resolution of 10-9

International Nuclear Information System (INIS)

Zhang Xiaowei; Sugiyama, Hiroshi; Fugimoto, Hiroyuki; Waseda, Atsushi; Takatomi, Toshikazu

2010-01-01

For determination of the Avogadro's number, a self-referenced lattice comparator established at the Photon Factory to deal with a d-spacing mapping measurement over the cross section of a 4 ∼ 5 inches FZ silicon rod. For uncertainty of 1x10 -8 of the unit cell volume, it is necessary to measure lattice parameter of silicon with resolution of 3x10 -9 at least. In this paper, we report the principle of our lattice comparator, characterize our measurement system, and show some mapping measurement results of FZ silicon with resolution of 3x10 -9 .

Preparation and Characterization of γ-AgI in Superionic Composite Glasses (AgIx(AgPO31-x

Directory of Open Access Journals (Sweden)

S. Suminta

2007-07-01

Full Text Available The γ-AgI phase was stabilized at room temperature in the composites glasses (AgIx(AgPO31-x with x = 0.6 and 0.7 via rapid quenching of their molten mixture. The measurement of the crystal structure has been carried out using an X-ray Difractometer at the Physics Departement of Ibaraki University, Japan. The micro strain and crystal size are derived from Hall’s equation. The X-ray diffraction pattern shows some Bragg peaks that correspond to the crystalline γ-AgI. By increasing the concentration of AgI, the peak width becomes more narrow and the position shifts to the higher angle. This indicates that the crystalline size and microstrain are increasing. The increase of micro strain (η, and particle size (D will increase the ionic mobility, thus increasing the ionic conductivity. It is concluded that solidification process on melt AgI into glass matrix AgPO3 not only decreases the micro strain and the particle size, but it also increases the ionic conductivity.

Microstructural characterization of second phases in X10CrMoVNb9-1 and 12CrMoWCuVNb steels after long steam exposure time at 550 C

International Nuclear Information System (INIS)

Rodak, Kinga; Hernas, Adam; Vodarek, Vlastimil

2015-01-01

Microstructural changes in high alloy (9-12% Cr) creep resistant martensitic X10CrMoVNb9-1 and 12CrMoW . CuVNb steels after 100 000 h of steam exposure at 550 C have been studied using scanning transmission electron microscopy. Precipitates were identified using electron diffraction patterns and energy dispersive X-ray spectroscopy analysis. After long time exposure, a significant coarsening of M 23 C 6 carbides, and intensive precipitation of the coarse Laves phase were observed. Moreover, in the 12CrMoW . CuVNb steel, a low amount of the modified Z-phase particles was detected. The microstructures of the X10Cr . MoVNb9-1 and 12CrMoWCuVNb steels after 100 000 h of exposure differ in several aspects.

Microstructural characterization of second phases in X10CrMoVNb9-1 and 12CrMoWCuVNb steels after long steam exposure time at 550 C

Energy Technology Data Exchange (ETDEWEB)

Rodak, Kinga; Hernas, Adam [Silesian Univ. of Technology, Inst. of Materials Science, Katowice (Poland); Vodarek, Vlastimil [VSB-Technical Univ. of Ostrava (Czech Republic)

2015-07-15

Microstructural changes in high alloy (9-12% Cr) creep resistant martensitic X10CrMoVNb9-1 and 12CrMoW . CuVNb steels after 100 000 h of steam exposure at 550 C have been studied using scanning transmission electron microscopy. Precipitates were identified using electron diffraction patterns and energy dispersive X-ray spectroscopy analysis. After long time exposure, a significant coarsening of M{sub 23}C{sub 6} carbides, and intensive precipitation of the coarse Laves phase were observed. Moreover, in the 12CrMoW . CuVNb steel, a low amount of the modified Z-phase particles was detected. The microstructures of the X10Cr . MoVNb9-1 and 12CrMoWCuVNb steels after 100 000 h of exposure differ in several aspects.

Summary report for MEGAPIE R+D Task Group X9: Neutronic and nuclear assessment

International Nuclear Information System (INIS)

Zanini, L.

2005-12-01

The comprehensive work performed by the R+D task group X9 since the beginning of the MEGAPIE initiative is described in this summary report. The list of topics covered by this group is large and covers many of the essential aspects of an innovative system such as the MEGAPIE target. The X9 group worked on the neutronic and nuclear related aspects of the target design, as summarized in the following. The main tool in the neutronic design of a spallation neutron target is a reliable particle transport code, and nowadays the Monte Carlo technique is widely adopted in this field. There are several codes which are more or less extensively used in the nuclear physics community; at the beginning of the project a benchmark exercise was performed among several institutes using different Monte Carlo codes. The aim of the benchmark was to perform a code intercomparison by looking at the different predictions of several important quantities, as described later in the report. The benchmark results were first compiled in two separate reports. The results are critically discussed here. Based on the obtained results, and considering also other factors such as the code maintenance, the codes FLUKA and MCNPX were indicated as the most recommended ones to be used in the continuation of the X9 work. Proton and neutron fluxes in the MEGAPIE target were calculated. Detailed models of he MEGAPIE target and of the surrounding SINQ facility were developed, as well as of the present solid SINQ target. A comparison between the neutron flux with MEGAPIE and the SINQ solid target showed that the MEGAPIE target sill deliver 40% to 50% more thermal neutrons to the instruments served by SINQ as compared to the SINQ Mark 3 target. Calculations of the beam power deposition distributions are essential as input for the thermohydraulics CFD analysis of the lower target. Power deposition was calculated with FLUKA and MCNPX. The results from the two codes agree within 5%. Approximately 85% of the beam

Summary report for MEGAPIE R+D Task Group X9: Neutronic and nuclear assessment

Energy Technology Data Exchange (ETDEWEB)

Zanini, L

2005-12-15

The comprehensive work performed by the R+D task group X9 since the beginning of the MEGAPIE initiative is described in this summary report. The list of topics covered by this group is large and covers many of the essential aspects of an innovative system such as the MEGAPIE target. The X9 group worked on the neutronic and nuclear related aspects of the target design, as summarized in the following. The main tool in the neutronic design of a spallation neutron target is a reliable particle transport code, and nowadays the Monte Carlo technique is widely adopted in this field. There are several codes which are more or less extensively used in the nuclear physics community; at the beginning of the project a benchmark exercise was performed among several institutes using different Monte Carlo codes. The aim of the benchmark was to perform a code intercomparison by looking at the different predictions of several important quantities, as described later in the report. The benchmark results were first compiled in two separate reports. The results are critically discussed here. Based on the obtained results, and considering also other factors such as the code maintenance, the codes FLUKA and MCNPX were indicated as the most recommended ones to be used in the continuation of the X9 work. Proton and neutron fluxes in the MEGAPIE target were calculated. Detailed models of he MEGAPIE target and of the surrounding SINQ facility were developed, as well as of the present solid SINQ target. A comparison between the neutron flux with MEGAPIE and the SINQ solid target showed that the MEGAPIE target sill deliver 40% to 50% more thermal neutrons to the instruments served by SINQ as compared to the SINQ Mark 3 target. Calculations of the beam power deposition distributions are essential as input for the thermohydraulics CFD analysis of the lower target. Power deposition was calculated with FLUKA and MCNPX. The results from the two codes agree within 5%. Approximately 85% of the beam

9-β-arabinofuranosyladenine preferentially sensitizes radioresistant squamous cell carcinoma cell lines to x-rays

International Nuclear Information System (INIS)

Heaton, D.

1992-06-01

The effect of 9-β-arabinofuranosyladenine (ara-A) on sensitivity to the deleterious effects of x-rays was studied in six squamous cell carcinoma cell lines. Three lines were relatively radioresistant, having D 0 values of 2.31 to 2.89 Gy, and the other three lines were relatively radiosensitive, having D 0 values of between 1.07 and 1.45 Gy. Ara-A (50 or 500 μM) was added to cultures 30 min prior to irradiation and removed 30 min after irradiation, and sensitivity was measured in terms of cell survival. The radiosensitizing effect of ara-A was very dependent on the inherent radiosensitivity of the tumor cell line. Fifty micromolar concentrations of ara-A sensitized only the two most radioresistant lines, SCC-12B.2 and JSQ-3. Five hundred micromolar concentrations of ara-A sensitized the more sensitive cell lines, SQ-20B and SQ-9G, but failed to have any effect on the radiation response of the two most sensitive cell lines, SQ-38 and SCC-61. Concentrations of ara-A as low as 10 μM were equally efficient in inhibiting DNA synthesis in all six cell lines. These results suggest that the target for the radiosensitizing effect of ara-A is probably related to the factor controlling the inherent radiosensitivity of human tumor cells. Therefore, ara-A might be useful in overcoming radiation resistance in vivo

9-{beta}-arabinofuranosyladenine preferentially sensitizes radioresistant squamous cell carcinoma cell lines to x-rays

Energy Technology Data Exchange (ETDEWEB)

Heaton, D. [Rush Univ. Medical Center, Chicago, IL (United States). Therapeutic Radiology; Mustafi, R. [Chicago Univ., IL (United States). Dept. of Radiation and Cellular Oncology; Schwartz, J.L. [Chicago Univ., IL (United States). Dept. of Radiation and Cellular Oncology]|[Argonne National Lab., IL (United States)

1992-06-01

The effect of 9-{beta}-arabinofuranosyladenine (ara-A) on sensitivity to the deleterious effects of x-rays was studied in six squamous cell carcinoma cell lines. Three lines were relatively radioresistant, having D{sub 0} values of 2.31 to 2.89 Gy, and the other three lines were relatively radiosensitive, having D{sub 0} values of between 1.07 and 1.45 Gy. Ara-A (50 or 500 {mu}M) was added to cultures 30 min prior to irradiation and removed 30 min after irradiation, and sensitivity was measured in terms of cell survival. The radiosensitizing effect of ara-A was very dependent on the inherent radiosensitivity of the tumor cell line. Fifty micromolar concentrations of ara-A sensitized only the two most radioresistant lines, SCC-12B.2 and JSQ-3. Five hundred micromolar concentrations of ara-A sensitized the more sensitive cell lines, SQ-20B and SQ-9G, but failed to have any effect on the radiation response of the two most sensitive cell lines, SQ-38 and SCC-61. Concentrations of ara-A as low as 10 {mu}M were equally efficient in inhibiting DNA synthesis in all six cell lines. These results suggest that the target for the radiosensitizing effect of ara-A is probably related to the factor controlling the inherent radiosensitivity of human tumor cells. Therefore, ara-A might be useful in overcoming radiation resistance in vivo.

Design of the combustion system for the SGT5-8000H and first experiences in the Irsching power plant

Energy Technology Data Exchange (ETDEWEB)

Huth, Michael; Gruschka, Uwe; Janus, Bertram; Meisl, Juergen [Siemens AG, Energy Sector, Muelheim an der Ruhr (Germany); Wasif, Sam [Siemens Power Generation Inc., Energy Sector, Orlando, FL (United States)

2009-07-01

The lean premixed combustion system for the new SGT5-8000H 50Hz H-class engine was scaled from the smaller Siemens 60Hz F-class engine. The paper describes the combustion system in more details and the testing methodology including six sigma approaches. First experiences with SGT5-8000H Prototype-Engine in the Irsching power plant are summarised. (orig.)

Synthesis, Sintering, and Electrical Properties of BaCe0.9−xZrxY0.1O3−δ

DEFF Research Database (Denmark)

Ricote, S.; Caboche, G.; Estournes, C.

2008-01-01

BaCe0.9-xZrxY0.1O3-delta powders were synthesized by a solid-state reaction. Different contents of cerium and zirconium were studied. Pellets were sintered using either conventional sintering in air at 1700 degrees C or the Spark Plasma Sintering (SPS) technique. The density of the samples sintered...

Half metallic ferromagnet Pr_0_._9_5Mn_0_._9_3_9O_3 for spin based devices

International Nuclear Information System (INIS)

Santhosh Kumar, B.; Praveen Shankar, N.; Venkateswaran, C.; Manimuthu, P.

2016-01-01

Half Metallic Ferromagnets (HMF) are excellent candidates for spintronics devices due to their unusual 3d and 4s bands. Band theory and first principles calculations strongly predict that Pr based compounds are promising HMF candidates due to their spin hybridisation. Among all Pr based HMF, Pr_0_._9_5Mn_0_._9_3_9O_3 is special because of its pervoskite structure. The different oxidation states of Mn and Pr will enhance the hybridisation of 3d and 4f bands. The present study is experimental effort on the preparation of Pr based compounds

Effects of Yttrium and Iron co-doping on the high temperature thermoelectric properties of Ca{sub 3}Co{sub 4}O{sub 9+δ}

Energy Technology Data Exchange (ETDEWEB)

Wu, NingYu, E-mail: niwu@dtu.dk; Van Nong, Ngo; Pryds, Nini; Linderoth, Søren

2015-07-25

Highlights: • The Fe and Fe/Y doping at the Co- and Ca-sites of Ca{sub 3}Co{sub 4}O{sub 9+δ} were investigated. • The rising ρ by Y doping can be mitigated by the coupled Fe doping. • The increased Seebeck coefficient by Y doping can be maintained in co-doped system. • The co-doped system leads to an improvement of the thermoelectric performance. • The co-doped system may preserve the merits from each component doping. - Abstract: A series of Y and Fe co-doped Ca{sub 3−x}Y{sub x}Co{sub 4−y}Fe{sub y}O{sub 9+δ} (0 ⩽ x ⩽ 0.3, 0 ⩽ y ⩽ 0.1) samples synthesized by auto-combustion reaction and followed by a spark plasma sintering (SPS) processing with the effects of Fe and Y doping on the high temperature (RT to 800 °C) thermoelectric properties were systematically investigated. For the Fe-doped system (x = 0, y ⩽ 0.1), the electrical resistivity (ρ) decreased over the whole measured temperature range, while the Seebeck coefficient (S) remained almost the same. For the co-doped system, at any fixed Fe doping content, both ρ and S tended to increase with increasing Y dopants, however, the effect is more substantial on ρ than on S, particularly in the low temperature regime. In contrast to ρ and S, the in-plane thermal conductivity (κ) is only slightly influenced by Y and Fe substitutions. Among all the investigated samples, the co-doped sample with x = 0.1 and y = 0.03 showed a decrease of ρ, enhanced power factor over the measured temperature range, and improved ZT at 800 °C as compared to un-doped Ca{sub 3}Co{sub 4}O{sub 9+δ}.

domain of matrix metalloproteinase-9 (MMP-9)

Indian Academy of Sciences (India)

2015-12-03

Dec 3, 2015 ... Center for Food Products (Shanghai), Shanghai 200233, People's Republic of China ... gate the natural selection hypothesis of MMP-9, the orthologous sequences from ... fast evolving rate compared to the others analyzed.

Radiolabeled 9- or 10-monoiodostearic acid and 9- or 10-monoiodostearyl carnitine: Pt. 1

International Nuclear Information System (INIS)

Reed, K.W.; Ueda, C.T.; Murray, W.J.; Augustine, S.C.

1989-01-01

The purpose of this investigation was to synthesize and purify radiolabeled 9- or 10-monoiodostearyl carnitine for potential use as a perfusion and metabolic imaging agent for the heart. Oleic acid was iodinated via a free radical addition reaction of Hl across the double bond to give 9- or 10-monoiodostearic acid which in turn was esterified with carnitine. The identity of 9- or 10-monoiodostearic acid and 9-or 10-monoiodostearyl carnitine was determined using nuclear magnetic resonance (NMR), infrared (i.r.), ultraviolet (u.v.), and mass spectroscopy. The purity of the fatty acid and carnitine ester was established by thin layer chromatography. 9- or 10-Monoiodo[ 125 I]stearic acid and 9- or 10-monoiodo[ 125 I]stearyl carnitine were synthesized via the isotopic exchange of 125 I for cold iodine bonded to 9- or 10-monoiodostearic acid and 9- or 10-monoiodostearyl carnitine. (author)

Siemens technology transfer and cooperation in the nuclear fuel area

International Nuclear Information System (INIS)

Holley, H.-P.; Fuchs, J. H.; Rothenbuecher, R. A.

1997-01-01

Siemens is a full-range supplier in the area of nuclear power generation with broad experience and activities in the field of nuclear fuel. Siemens has developed advanced fuel technology for all types fuel assemblies used throughout the world and has significant experience worldwide in technology transfer in the field of nuclear fuel. Technology transfer and cooperation has ranged between the provision of mechanical design advice for a specific fuel design and the erection of complete fabrication plants for commercial operation in 3 countries. In the following the wide range of Siemens' technology transfer activities for both fuel design and fuel fabrication technologies are shown

Estimation of "9"9Mo production rates from natural molybdenum in research reactors

International Nuclear Information System (INIS)

Blaauw, M.; Chakrova, Y.; Jacimovic, R.; Kling, A.

2017-01-01

Molybdenum-99 is one of the most important radionuclides for medical diagnostics. In 2015, the International Atomic Energy Agency organized a round-robin exercise where the participants measured and calculated specific saturation activities achievable for the "9"8Mo(n,γ)"9"9Mo reaction. This reaction is of interest as a means to locally, and on a small scale, produce "9"9Mo from natural molybdenum. The current paper summarises a set of experimental results and reviews the methodology for calculating the corresponding saturation activities. Activation by epithermal neutrons and also epithermal neutron self-shielding are found to be of high importance in this case. (author)

Chemical Substitution-Induced and Competitive Formation of 6H and 3C Perovskite Structures in Ba3-xSrxZnSb2O9: The Coexistence of Two Perovskites in 0.3 ≤ x ≤ 1.0.

Science.gov (United States)

Li, Jing; Jiang, Pengfei; Gao, Wenliang; Cong, Rihong; Yang, Tao

2017-11-20

6H and 3C perovskites are important prototype structures in materials science. We systemically studied the structural evolution induced by the Sr 2+ -to-Ba 2+ substitution to the parent 6H perovskite Ba 3 ZnSb 2 O 9 . The 6H perovskite is only stable in the narrow range of x ≤ 0.2, which attributes to the impressibility of [Sb 2 O 9 ]. The preference of 90° Sb-O-Sb connection and the strong Sb 5+ -Sb 5+ electrostatic repulsion in [Sb 2 O 9 ] are competitive factors to stabilize or destabilize the 6H structure when chemical pressure was introduced by Sr 2+ incorporation. Therefore, in the following, a wide two-phase region containing 1:2 ordered 6H-Ba 2.8 Sr 0.2 ZnSb 2 O 9 and rock-salt ordered 3C-Ba 2 SrZnSb 2 O 9 was observed (0.3 ≤ x ≤ 1.0). In the final, the successive symmetry descending was established from cubic (Fm3̅m, 1.3 ≤ x ≤ 1.8) to tetragonal (I4/m, 2.0 ≤ x ≤ 2.4), and finally to monoclinic (I2/m, 2.6 ≤ x ≤ 3.0). Here we proved that the electronic configurations of B-site cations, with either empty, partially, or fully filled d-shell, would also affect the structure stabilization, through the orientation preference of the B-O covalent bonding. Our investigation gives a deeper understanding of the factors to the competitive formation of perovskite structures, facilitating the fine manipulation on their physical properties.

Estudio dieléctrico de cerámicas de textura y microestructura controladas con composiciones (SrBi2Nb2O91-x(Bi3TiNbO9x

Directory of Open Access Journals (Sweden)

Pardo, L.

2002-02-01

Full Text Available Ceramics of composition (SrBi2Nb2O91-x(Bi3TiNbO9x with x = 0.35, 0.65 and 1.00 and Aurivillius type structure have been prepared by natural sintering and hot pressing. Amorphous precursors were obtained by mechanochemical activation of stoichiometric mixtures of oxides and carbonates, which allows using moderate processing temperatures. These materials are interesting for their use as high temperature piezoelectrics. Dielectric characterisation allows to know the temperature at what takes place the ferro-paraelectric transition, which limits the working temperature of the material. It also gives information on how the electric properties, especially the d. c. conductivity, affect the polarizability of the ceramics. The properties relation with the microstructure and the texture is studied. In this work, dielectric studies of these materials have been made, in the frequency interval from 100 Hz to 5 MHz and in the temperature range from 200 ºC up to the ferroparaelectric transition temperatures (>900 ºC for Bi3TiNbO9.Se han preparado cerámicas de la solución sólida (SrBi2Nb2O91-x(Bi3TiNbO9x con x = 0.35, 0.65 y 1.00 y estructura tipo Aurivillius obtenidas por sinterización natural y por prensado en caliente. Se parte de precursores amorfos obtenidos por activación mecanoquímica de una mezcla estequiométrica de óxidos y carbonatos, lo que permite utilizar temperaturas moderadas de procesado. Estos materiales son interesantes por su posible uso como piezoeléctricos de alta temperatura. La caracterización dieléctrica permite establecer a qué temperatura se encuentra la transición ferro-paraeléctrica que limita la temperatura de uso del material y como afectan las propiedades eléctricas, especialmente la conductividad d. c., a la polarizabilidad de las cerámicas, así como su relación con su microestructura y textura. En este trabajo se ha realizado el estudio dieléctrico de estos materiales en el intervalo de frecuencias de 100

Development of plasma melting technology for treatment of low level radioactive waste. Pt. 9. Treatment method for combustible wastes

International Nuclear Information System (INIS)

Yasui, Shinji; Adachi, Kazuo; Amakawa, Masashi

1996-01-01

This paper describes the incineration method for the miscellaneous solid waste containing the low level radioactive combustibles (wood, PE, PVC) in a plasma furnace. The maximum weights of the respective combustibles to be fed into the plasma furnace and the incineration conditions for continuous feeding of the respective combustibles were examined experimentally. As a result, a experimental equation which expresses the maximum weights of the respective combustibles to be fed in reference to the residence time in the plasma furnace was obtained by using apparent reaction rate constants. Furthermore, a calculation method for the feeding intervals in reference to the weights of the combustibles fed each time was obtained for the continuous feeding in the plasma furnace, and the method was found to be consistent with experimental results. (author)

Multi-wavelength properties of two supersoft X-ray sources CAL83 and RXJ0513.9-6951

Science.gov (United States)

Rajoelimanana, A.; Meintjes, P.; Charles, P.

2017-10-01

Supersoft X-ray sources (SSS) are highly luminous (˜10^{38} erg s^{-1}), yet low temperature 10^{6} K sources, interpreted as a white dwarf (WD) accreting matter at a very high rate from its (heavy) companion, leading to Eddington-limited, steady hydrogen burning on the WD surface at T˜15-80 eV. A large fraction of this energy irradiates the surface of the disc, which gives rise to a reprocessed flux much larger than the intrinsic disc luminosity, accounting for the large optical and UV fluxes detected in SSS. We present the multi-wavelength properties of two prototypical LMC SSS, CAL83 and RXJ0513.9-6951, with particular emphasis on the anti-correlation between their X-ray and optical behaviour. Our SALT spectra show variable high excitation OVI emission as a function of optical brightness state, and which we link to the cyclic changes in the temperature and size of the WD, and hence the mass accretion rate.

EXOSAT observations of V471 Tauri - a 9.25 minute white dwarf pulsation and orbital phase dependent X-ray dips

International Nuclear Information System (INIS)

Jensen, K.A.; Swank, J.H.; Petre, P.; Guinan, E.F.; Sion, E.M.; Navy, E. O. Hulburt Center for Space Research, Washington, DC; Villanova Univ., PA)

1986-01-01

New results obtained from a 28 hr continuous observation of V471 Tauri with the EXOSAT satellite are reported. The detection of soft X-ray fluxes from both the white dwarf and the K dwarf, the discovery of a 9.25 minute pulsation from the white dwarf, and the discovery of orbital phase-related soft X-ray dips are discussed. The dips may be correlated with the triangular Lagrangian points of the binary orbit. The X-ray flux from the white dwarf is consistent with thermal models for a white dwarf photosphere with T(eff) of about 35,000 K, log g = 8.0-8.5, and log N(H) = 18.65 + or - 0.2. 25 references

Sol-gel syntheses, luminescence, and energy transfer properties of α-GdB5O9:Ce(3+)/Tb(3+) phosphors.

Science.gov (United States)

Sun, Xiaorui; Gao, Wenliang; Yang, Tao; Cong, Rihong

2015-02-07

Sol-gel method was applied to prepare homogenous and highly crystalline phosphors with the formulas α-GdB5O9:xTb(3+) (0 ≤ x ≤ 1), α-Gd1-xCexB5O9 (0 ≤ x ≤ 0.40), α-GdB5O9:xCe(3+), 0.30Tb(3+) (0 ≤ x ≤ 0.15) and α-GdB5O9:0.20Ce(3+), xTb(3+) (0 ≤ x ≤ 0.10). The success of the syntheses was proved by the linear shrinkage or expansion of the cell volumes against the substitution contents. In α-GdB5O9:xTb(3+), an efficient energy transfer from Gd(3+) to Tb(3+) was observed and there was no luminescence quenching. The exceptionally high efficiency of the f-f excitations of Tb(3+) implies that these phosphors may be good green-emitting UV-LED phosphors. For α-Gd1-xCexB5O9, Ce(3+) absorbs the majority of the energy and transfers it to Gd(3+). Therefore, the co-doping of Ce(3+) and Tb(3+) leads to a significant enhancement in the green emission of Tb(3+). Our current results together with the study on α-GdB5O9:xEu(3+) in the literature indicate that α-GdB5O9 is a good phosphor host with advantages including controllable preparation, diverse cationic doping, the absence of concentration quenching, and effective energy transfer.

Cluster shell model: I. Structure of 9Be, 9B

Science.gov (United States)

Della Rocca, V.; Iachello, F.

2018-05-01

We calculate energy spectra, electromagnetic transition rates, longitudinal and transverse electron scattering form factors and log ft values for beta decay in 9Be, 9B, within the framework of a cluster shell model. By comparing with experimental data, we find strong evidence for the structure of these nuclei to be two α-particles in a dumbbell configuration with Z2 symmetry, plus an additional nucleon.

Siemens tasks and activities during gradual upgrading

International Nuclear Information System (INIS)

Kuehne, B.

2001-01-01

The gradual upgrading of NPP V1 Bohunice constitutes the most extensive reconstruction project to be performed in an operational WWER plant to date. It constitutes a milestone in Siemens co-operation on projects for WWERs to date and is an encouraging example for the successful combination of western and eastern safety cultures. During the runtime of this project Siemens learnt very much about the 'complete function' as well as the details of this WWER plant type. In contrast the Slovakian partners really gained a much better understanding for the western approach to ensure safety, for the most modern safety technology, in particular for instrumentation and control, and last but not least or advanced project management. (author)

Magnetic properties of compounds Ba/sub 3/Fesub(2-x)Msub(x)UO/sub 9/ with M=Y, Sc, In and rare earth

Energy Technology Data Exchange (ETDEWEB)

Grenet, J C; Berthon, J [Paris-11 Univ., 91 - Orsay (France); Poix, P [Ecole Nationale Superieure de Chimie, 67 - Strasbourg (France)

1979-01-01

The compounds Ba/sub 3/Fesub(2-x)Msub(x)UO/sub 9/ crystallize in the perovskite type system. The magnetic behavior of these compounds is different when M/sup 3 +/ is dia- or paramagnetic. When M/sup 3 +/ is diamagnetic, the magnetic exchange interaction between A and B sublattices is strongly antiferromagnetic, the (UO/sub 6/)/sup 6 -/ clusters having a special effect. When M/sup 3 +/ is paramagnetic, the perovskite compounds have three magnetic sublattices. In the third one are placed rare earth ions M/sup 3 +/; in this case the A-B exchange interactions are antiferromagnetic but the interactions with the third sublattice are probably slightly ferromagnetic. This special feature and the fact that a temperature of compensation is missing differentiate these perovskites from the garnets.

Pressurized Fluidized Bed Combustion Second-Generation System Research and Development

Energy Technology Data Exchange (ETDEWEB)

A. Robertson; D. Horazak; R. Newby; H. Goldstein

2002-11-01

Research is being conducted under United States Department of Energy (DOE) Contract DE-AC21-86MC21023 to develop a new type of coal-fired plant for electric power generation. This new type of plant--called a Second-Generation or Advanced Pressurized Circulating Fluidized Bed Combustion (APCFB) plant--offers the promise of efficiencies greater than 45% (HHV), with both emissions and a cost of electricity that are significantly lower than conventional pulverized-coal-fired plants with scrubbers. The APCFB plant incorporates the partial gasification of coal in a carbonizer, the combustion of carbonizer char in a pressurized circulating fluidized bed boiler (PCFB), and the combustion of carbonizer syngas in a topping combustor to achieve gas turbine inlet temperatures of 2300 F and higher. A conceptual design was previously prepared for this new type of plant and an economic analysis presented, all based on the use of a Siemens Westinghouse W501F gas turbine with projected carbonizer, PCFB, and topping combustor performance data. Having tested these components at the pilot plant stage, the referenced conceptual design is being updated to reflect more accurate performance predictions together with the use of the more advanced Siemens Westinghouse W501G gas turbine and a conventional 2400 psig/1050 F/1050 F/2-1/2 in. steam turbine. This report describes the updated plant which is projected to have an HHV efficiency of 48% and identifies work completed for the October 2001 through September 2002 time period.

Optoelectronic property enhancement of conjugated polymer in poly(9,9 Prime -di-n-octylfluorenyl-2.7-diyl)/titania nanocomposites

Energy Technology Data Exchange (ETDEWEB)

Jumali, Mohammad Hafizuddin Haji, E-mail: hafizhj@ukm.my [School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor (Malaysia); Al-Asbahi, Bandar Ali, E-mail: alasbahibandar@gmail.com [School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor (Malaysia); Department of Physics, Faculty of Science, Sana' a University (Yemen); Yap, Chi Chin [School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor (Malaysia); Salleh, Muhamad Mat [Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor (Malaysia); Alsalhi, Mohamad Saleh [Department of Physics and Astronomy, Laser Group, College of Science, King Saud University (Saudi Arabia)

2012-12-01

Optoelectronic property enhancement of poly(9,9 Prime -di-n-octylfluorenyl-2.7-diyl) (PFO) by different weight ratios of TiO{sub 2} nanoparticles (NPs) is demonstrated. The solution blending method was used to prepare the PFO/TiO{sub 2} nanocomposite. The microstructure of the composites was determined using X-ray diffraction while absorption and fluorescence spectra were recorded using UV-Vis and photoluminescence spectrophotometer respectively. X-ray diffractograms confirmed the formation of PFO/TiO{sub 2} nanocomposites. The absorbance and fluorescence spectra of the PFO/TiO{sub 2} nanocomposite were proportionately enhanced with the content of TiO{sub 2} NPs. The recombination between electrons of TiO{sub 2} and holes of PFO, through the interface of PFO/TiO{sub 2} nanocomposites enhanced the luminescence properties. Besides, the energy gap, line width of phonon emission intensity and vibronic spacing decreased. The line width of the energy gap tails, the vibronic transition intensity and the S-factor increased resulting from higher aggregation of films as supported by field emission scanning electron microscope images. The observed turn on voltage of the indium tin oxide/(PFO/TiO{sub 2})/Al organic light emitting diode device displayed a decreasing trend, suggesting an improvement on the performance of the device as the TiO{sub 2} content was increased. - Highlights: Black-Right-Pointing-Pointer No variation in structure of poly(9,9 Prime -di-n-octylfluorenyl-2.7-diyl) (PFO) and TiO{sub 2}. Black-Right-Pointing-Pointer The absorbance and fluorescence spectra of PFO were enhanced with TiO{sub 2} content. Black-Right-Pointing-Pointer The increase of PFO intensity upon addition of TiO{sub 2} due to charge trapping effect. Black-Right-Pointing-Pointer The inclusion of TiO{sub 2} in PFO enhanced the conformational disorder. Black-Right-Pointing-Pointer Incorporation of TiO{sub 2} reduced the turn-on voltage of organic light emitting diode.

Thermoelectric properties of Ca1-xYxMnO3 and Ca0.9Y0.1-yFeyMnO3 perovskite compounds

DEFF Research Database (Denmark)

Thuy, Nguyen Thi; Minh, Dang Le; Van Nong, Ngo

2012-01-01

Polycrystalline Ca1-xYxMnO3 (x = 0.0; 0.1; 0.3; 0.5; 0.7) and Ca0.9Y0.1-yFeyMnO3 (y = 0.00; 0.01; 0.03; 0.05) compounds were prepared by solid-state reaction. X-ray diffraction (XRD) analysis revealed all XRD peaks of all the samples as identical to the orthorhombic structure. The thermoelectric ...

Activity concentration measurements using a conjugate gradient (Siemens xSPECT) reconstruction algorithm in SPECT/CT.

Science.gov (United States)

Armstrong, Ian S; Hoffmann, Sandra A

2016-11-01

The interest in quantitative single photon emission computer tomography (SPECT) shows potential in a number of clinical applications and now several vendors are providing software and hardware solutions to allow 'SUV-SPECT' to mirror metrics used in PET imaging. This brief technical report assesses the accuracy of activity concentration measurements using a new algorithm 'xSPECT' from Siemens Healthcare. SPECT/CT data were acquired from a uniform cylinder with 5, 10, 15 and 20 s/projection and NEMA image quality phantom with 25 s/projection. The NEMA phantom had hot spheres filled with an 8 : 1 activity concentration relative to the background compartment. Reconstructions were performed using parameters defined by manufacturer presets available with the algorithm. The accuracy of activity concentration measurements was assessed. A dose calibrator-camera cross-calibration factor (CCF) was derived from the uniform phantom data. In uniform phantom images, a positive bias was observed, ranging from ∼6% in the lower count images to ∼4% in the higher-count images. On the basis of the higher-count data, a CCF of 0.96 was derived. As expected, considerable negative bias was measured in the NEMA spheres using region mean values whereas positive bias was measured in the four largest NEMA spheres. Nonmonotonically increasing recovery curves for the hot spheres suggested the presence of Gibbs edge enhancement from resolution modelling. Sufficiently accurate activity concentration measurements can easily be measured on images reconstructed with the xSPECT algorithm without a CCF. However, the use of a CCF is likely to improve accuracy further. A manual conversion of voxel values into SUV should be possible, provided that the patient weight, injected activity and time between injection and imaging are all known accurately.

Mariner 9 Michelson interferometer.

Science.gov (United States)

Hanel, R.; Schlachman, B.; Rodgers, D.; Breihan, E.; Bywaters, R.; Chapman, F.; Rhodes, M.; Vanous, D.

1972-01-01

The Michelson interferometer on Mariner 9 measures the thermal emission spectrum of Mars between 200 and 2000 per cm (between 5 and 50 microns) with a spectral resolution of 2.4 per cm in the apodized mode. A noise equivalent radiance of 0.5 x 10 to the minus 7th W/sq cm/ster/cm is deduced from data recorded in orbit around Mars. The Mariner interferometer deviates in design from the Nimbus 3 and 4 interferometers in several areas, notably, by a cesium iodide beam splitter and certain aspects of the digital information processing. Special attention has been given to the problem of external vibration. The instrument performance is demonstrated by calibration data and samples of Mars spectra.

Analyzing power and differential cross section at 9. 9, 11. 9 and 13. 9 MeV for Ca(n,n)Ca

Energy Technology Data Exchange (ETDEWEB)

Tornow, W.; Woye, E.; Mack, G. (Tuebingen Univ. (Germany, F.R.). Physikalisches Inst.); Floyd, C.E.; Murphy, K.; Guss, P.P.; Wender, S.A.; Byrd, R.C.; Walter, R.L. (Duke Univ., Durham, NC (USA). Dept. of Physics; Triangle Universities Nuclear Lab., Durham, NC (USA))

1982-09-13

The analyzing power and differential cross section for elastic neutron scattering from calcium have been measured at 9.9, 11.9 and 13.9 MeV using the /sup 2/H(d,n)/sup 3/He source reaction and neutron time-of-flight (t.o.f.) techniques to detect the scattered neutrons. Polarized neutron beams were produced via the polarization transfer reaction /sup 2/H(d vector,n vector)/sup 3/He at THETA = 0/sup 0/. The data have been corrected for finite geometry and multiple scattering effects. None of the global neutron-nucleus optical model parameter sets usually referred to in the literature reproduces the present cross-section and analyzing power data. Individual as well as energy-averaged fits of the data resulting from new optical model searches are presented. It is shown that the quoted uncertainties of a recent empirical determination of the real part ..delta..Vsub(C) of the Coulomb correction term are probably underestimated. Our imaginary Coulomb correction term ..delta..Wsub(C) agrees quite well with both a very recent empirical determination and theoretical studies. Although the quality of the fits to the data can be improved by adding iota-dependent potentials to the general optical potential, no definite conclusions can be drawn from the present data as to whether or not iota-dependent potentials are important in neutron-calcium scattering in the energy range investigated. The data have also been analyzed using a Fourier-Bessel series description of the real central optical potential. Comparing the chi/sup 2/ values, the experimental data are better reproduced by the Fourier-Bessel method than by our Woods-Saxon optical model analyses. The Fourier-Bessel potentials obtained show strong deviations from the standard Woods-Saxon shape but are in good agreement with calculations using the nuclear structure approach.

Analyzing power and differential cross section at 9.9, 11.9 and 13.9 MeV for Ca(n,n)Ca

International Nuclear Information System (INIS)

Tornow, W.; Woye, E.; Mack, G.; Clegg, T.

1982-01-01

The analyzing power and differential cross section for elastic neutron scattering from calcium have been measured at 9.9, 11.9 and 13.9 MeV using the 2 H(d,n) 3 He source reaction and neutron time-of-flight (t.o.f.) techniques to detect the scattered neutrons. Polarized neutron beams were produced via the polarization transfer reaction 2 H(d vector,n vector) 3 He at THETA = 0 0 . The data have been corrected for finite geometry and multiple scattering effects. None of the global neutron-nucleus optical model parameter sets usually referred to in the literature reproduces the present cross-section and analyzing power data. Individual as well as energy-averaged fits of the data resulting from new optical model searches are presented. It is shown that the quoted uncertainties of a recent empirical determination of the real part ΔVsub(C) of the Coulomb correction term are probably underestimated. Our imaginary Coulomb correction term ΔWsub(C) agrees quite well with both a very recent empirical determination and theoretical studies. Although the quality of the fits to the data can be improved by adding iota-dependent potentials to the general optical potential, no definite conclusions can be drawn from the present data as to whether or not iota-dependent potentials are important in neutron-calcium scattering in the energy range investigated. The data have also been analyzed using a Fourier-Bessel series description of the real central optical potential. Comparing the chi 2 values, the experimental data are better reproduced by the Fourier-Bessel method than by our Woods-Saxon optical model analyses. The Fourier-Bessel potentials obtained show strong deviations from the standard Woods-Saxon shape but are in good agreement with calculations using the nuclear structure approach. (orig.)

Ares I-X Launch Abort System, Crew Module, and Upper Stage Simulator Vibroacoustic Flight Data Evaluation, Comparison to Predictions, and Recommendations for Adjustments to Prediction Methodology and Assumptions

Science.gov (United States)

Smith, Andrew; Harrison, Phil

2010-01-01

The National Aeronautics and Space Administration (NASA) Constellation Program (CxP) has identified a series of tests to provide insight into the design and development of the Crew Launch Vehicle (CLV) and Crew Exploration Vehicle (CEV). Ares I-X was selected as the first suborbital development flight test to help meet CxP objectives. The Ares I-X flight test vehicle (FTV) is an early operational model of CLV, with specific emphasis on CLV and ground operation characteristics necessary to meet Ares I-X flight test objectives. The in-flight part of the test includes a trajectory to simulate maximum dynamic pressure during flight and perform a stage separation of the Upper Stage Simulator (USS) from the First Stage (FS). The in-flight test also includes recovery of the FS. The random vibration response from the ARES 1-X flight will be reconstructed for a few specific locations that were instrumented with accelerometers. This recorded data will be helpful in validating and refining vibration prediction tools and methodology. Measured vibroacoustic environments associated with lift off and ascent phases of the Ares I-X mission will be compared with pre-flight vibration predictions. The measured flight data was given as time histories which will be converted into power spectral density plots for comparison with the maximum predicted environments. The maximum predicted environments are documented in the Vibroacoustics and Shock Environment Data Book, AI1-SYS-ACOv4.10 Vibration predictions made using statistical energy analysis (SEA) VAOne computer program will also be incorporated in the comparisons. Ascent and lift off measured acoustics will also be compared to predictions to assess whether any discrepancies between the predicted vibration levels and measured vibration levels are attributable to inaccurate acoustic predictions. These comparisons will also be helpful in assessing whether adjustments to prediction methodologies are needed to improve agreement between the

Enhanced magnetic and ferroelectric properties in scandium doped nano Bi{sub 2}Fe{sub 4}O{sub 9}

Energy Technology Data Exchange (ETDEWEB)

Dutta, Dimple P., E-mail: dimpled@barc.gov.in [Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085 (India); Sudakar, C.; Mocherla, Pavana S.V. [Department of Physics, IIT Madras, Chennai 600 036 (India); Mandal, Balaji P.; Jayakumar, Onnatu D. [Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085 (India); Tyagi, Avesh K., E-mail: aktyagi@barc.gov.in [Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085 (India)

2012-08-15

In this study we report the synthesis of undoped and Sc{sup 3+} doped Bi{sub 2}Fe{sub 4}O{sub 9} nanoparticles using sonochemical technique. X-ray diffraction reveals that all samples are single phase with no impurities detected. EDS analysis was done to confirm the extent of Sc{sup 3+} doping in the samples. The size and morphology of the nanoparticles have been analyzed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The Bi{sub 2}Fe{sub 4}O{sub 9} nanoparticles show a weak ferromagnetic behavior at room temperature, which is quite different from the linear M-H relationship reported for bulk Bi{sub 2}Fe{sub 4}O{sub 9}. A magnetization of 0.144 {mu}B/f.u. is obtained at 300 K, which is mainly attributed to the uncompensated moments at the disordered particle surface resulting from the reduced coordination of the surface spins, arising due to lattice strain or oxygen deficiency. Addition of Sc{sup 3+} dopant in varying concentrations in these Bi{sub 2}Fe{sub 4}O{sub 9} nanoparticles, improves their magnetic as well as ferroelectric properties. The leakage current is considerably reduced and electric polarization increases significantly in case of Bi{sub 2}Fe{sub 4(1-x)}Sc{sub x}O{sub 9} (x = 0.1) nanoparticles. Thus it can be inferred that Sc{sup 3+} doped Bi{sub 2}Fe{sub 4}O{sub 9} nanoparticles shows promise as good multiferroic materials. -- Graphical abstract: Undoped and Sc{sup 3+} doped Bi{sub 2}Fe{sub 4}O{sub 9} nanoparticles have been synthesized using sonochemical technique. The bi-functionalities of Sc{sup 3+} doped Bi{sub 2}Fe{sub 4}O{sub 9} nanoparticles have been demonstrated. The Bi{sub 2}Fe{sub 4(1-x)}Sc{sub x}O{sub 9} (x = 0.1) nanoparticles showed enhanced magnetic and ferroelectric properties with considerably less lossy characteristics compared to the bulk Bi{sub 2}Fe{sub 4}O{sub 9}. Highlights: Black-Right-Pointing-Pointer Phase pure Bi{sub 2}Fe{sub 4}O{sub 9} nanostructures synthesized using a facile

Siemens's spectrum of deliveries and services for nuclear power plants

International Nuclear Information System (INIS)

2011-01-01

In 2001, Siemens and Framatome merged their nuclear activities in the present Areva NP joint venture. Siemens has since focused on the construction and further development of conventional power plants and on the so-called conventional island (CI), the non-nuclear part of a nuclear power plant, i.e. the steam turbine, generator, and plant I and C systems, and also on service for the conventional part of nuclear power plants. Its role as a minority shareholder in Areva NP constrained Siemens. For this reason, the company in January 2009 decided to terminate its interest in Areva NP effective January 30, 2012. By January 2012 at the latest, Siemens will transfer to the majority shareholder Areva, holding 66 percent of the shares, its interest in the joint venture. For the time being, the joint venture still entails certain limitations to Siemens's activities in the nuclear field. Its delivery of the conventional island for the Olkiluoto 3 (OL3) nuclear power plant in Finland confirms the company's know-how in power plant construction. When commissioned, its 1,720 MW power will make OL3 the world's largest nuclear generating unit. The turbo-generator of the CI comprises a double-flow HP turbine and a 6-flow LP turbine. The driven 4-pole generator with a power of up to 2,200 MVA consists of a water-cooled stator and a hydrogen-cooled rotor. (orig.)

TOGAF 9 foundation study guide preparation for the TOGAF 9 part 1 examination

CERN Document Server

Harrison, Rachel

2013-01-01

This title is a Study Guide for Togaf® 9 Foundation. It gives an overview of every learning objective for the Togaf 9 Foundation Syllabus and in-depth coverage on preparing and taking the Togaf 9 Part 1 Examination. It is specifically designed to help individuals prepare for certification. This Study Guide is excellent material for: * Individuals who require a basic understanding of Togaf 9; * Professionals who are working in roles associated with an architecture project such as those responsible for planning, execution, development, delivery, and operation; * Architects who are looking for a first introduction to Togaf 9; * Architects who want to achieve Level 2 certification in a stepwise manner and have not previously qualified as Togaf 8 Certified. A prior knowledge of enterprise architecture is advantageous but not required.

The role of nuclear power in external and internal communications at Siemens

International Nuclear Information System (INIS)

Breyer, Wolfgang

1999-01-01

'Der Spiegel', quotes Siemens CEO as saying that the nuclear business accounts for 2 percent of the business but for 95 percent of his troubles. The communications organization at Siemens is rather complex. As a consequence of the political relevance of energy technology, KWU has a public relations department addressing a broad spectrum of stake holders, runs a quarterly magazine on energy and environmental policy called Standpunkt, (Viewpoint) and has, the largest press office of all Siemens Groups. These entities also contribute to the corporate media for internal and external communications. When the nuclear controversy in Germany reached its first culmination in the mid-1970s, Kraftwerk Union, the forerunner of what is now the Siemens Power Generation Group (KWU), automatically became a leading voice on the pro-nuclear side because, as turnkey contractor for most of Germany's NPPs, it had the deepest knowledge of the technology whereas the owner/operator side was and is organized in several utilities. From the German experience with anti-nuke campaign one could draw the following conclusions: (1) A political,, technology like nuclear necessarily leads to a high profile in the public. As the No. nuclear supplier in Germany Siemens doesn't have the option of a low profile; (2) As a consequence, the nuclear business gets unproportional attention in the public. Siemens has to take this into account in order to assure its other business areas enough visibility; (3) For public relations on nuclear power, the internal audience is as important as the external one. Because of the large work-force of Siemens, internal communications have a significant multiplication effect for the external audience; (4) A broad spectrum of non-nuclear activities doesn't make a company like Siemens more vulnerable to public pressure than a mono-structured company. On the contrary: The high prestige gained in its other business fields makes it easier to defend the nuclear business as

PREFACE: 9th International Conference on X-Ray Microscopy

Science.gov (United States)

Quitmann, Christoph; David, Christian; Nolting, Frithjof; Pfeiffer, Franz; Stampanoni, Marco

2009-09-01

winners of the Werner Meyer-Ilse Award are joined by Andrea Meyer-Ilse, the wife of the deceased x-ray microscopy pioneer Werner Meyer-Ilse. From left to right: Weilun Chao (winner 2005), Ann Sakdinawat (winner 2008), Piere Thibault (winner 2008), Andrea Meyer-Ilse and M Feser (winner 2002). Conference photograph Figure 8 Reception in the court of Schloss Rapperswil during the XRM2008 conference excursion. Conference photograph Figure 9 Conference participants walking towards the castle of Rapperswil during the conference excursion. Conference photograph Figure 10 Accompanying persons group gathered in the port of Lucerne.

Reduced Activity of SRY and its Target Enhancer Sox9-TESCO in a Mouse Species with X*Y Sex Reversal.

Science.gov (United States)

Zhao, Liang; Quinn, Alexander; Ng, Ee Ting; Veyrunes, Frederic; Koopman, Peter

2017-02-03

In most eutherian mammals, sex determination is governed by the Y-linked gene Sry, but in African pygmy mice Mus minutoides, Sry action is overridden by a variant X chromosome (X*), yielding X*Y females. We hypothesized that X*Y sex reversal may be underpinned not only by neomorphic X chromosome functionality, but also by a compromised Sry pathway. Here, we show that neither M. minutoides SRY nor its target, the Sox9-TESCO enhancer, had appreciable transcriptional activity in in vitro assays, correlating with sequence degradation compared to Mus musculus counterparts. However, M. minutoides SRY activated its cognate TESCO to a moderate degree, and can clearly engage the male pathway in M. minutoides in the wild, indicating that SRY and TESCO may have co-evolved in M. minutoides to retain function above a threshold level. We suggest that weakening of the SRY/TESCO nexus may have facilitated the rise and spread of a variant X* chromosome carrying female-inducing modifier gene(s).

Annealing treatment effects on structure and superconductivity in Y1Ba2Cu3O/sub 9-//sub x/

International Nuclear Information System (INIS)

Beyers, R.; Lim, G.; Engler, E.M.

1987-01-01

We report the effects of heat treatment and ambient on the structure and superconducting properties of Y 1 Ba 2 Cu 3 O/sub 9-//sub x/. The structure undergoes an orthorhombic-to-tetragonal transition on heating at about 700 0 C, caused by oxygen loss and disordering of oxygen vacancies on the copper plane between the barium layers. Heat treatments that promote maximum ordering of the oxygen vacancies result in superior superconducting properties

Curcumin inhibits oral squamous cell carcinoma SCC-9 cells proliferation by regulating miR-9 expression

Energy Technology Data Exchange (ETDEWEB)

Xiao, Can [Department of Occupational Medicine and Environmental Health, School of Public Health, Soochow University, Suzhou 215123 (China); Department of Stomatology, The First Affiliated Hospital of Soochow University, Suzhou 215006 (China); Wang, Lili; Zhu, Lifang [Department of Stomatology, The First Affiliated Hospital of Soochow University, Suzhou 215006 (China); Zhang, Chenping, E-mail: zhang_cping@163.com [Department of Head and Neck Tumors, Shanghai Ninth People’s Hospital Affiliated Shanghai JiaoTong University School of Medicine, Shanghai 200011 (China); Zhou, Jianhua [Department of Occupational Medicine and Environmental Health, School of Public Health, Soochow University, Suzhou 215123 (China)

2014-11-28

Highlights: • miR-9 expression level was significantly decreased in OSCC tissues. • Curcumin significantly inhibited SCC-9 cells proliferation. • miR-9 mediates the inhibition of SCC-9 proliferation by curcumin. • Curcumin suppresses Wnt/β-catenin signaling in SCC-9 cells. • miR-9 mediates the suppression of Wnt/β-catenin signaling by curcumin. - Abstract: Curcumin, a phytochemical derived from the rhizome of Curcuma longa, has shown anticancer effects against a variety of tumors. In the present study, we investigated the effects of curcumin on the miR-9 expression in oral squamous cell carcinoma (OSCC) and explored the potential relationships between miR-9 and Wnt/β-catenin pathway in curcumin-mediated OSCC inhibition in vitro. As the results shown, the expression levels of miR-9 were significantly lower in clinical OSCC specimens than those in the adjacent non-tumor tissues. Furthermore, our results indicated that curcumin inhibited OSCC cells (SCC-9 cells) proliferation through up-regulating miR-9 expression, and suppressing Wnt/β-catenin signaling by increasing the expression levels of the GSK-3β, phosphorylated GSK-3β and β-catenin, and decreasing the cyclin D1 level. Additionally, the up-regulation of miR-9 by curcumin in SCC-9 cells was significantly inhibited by delivering anti-miR-9 but not control oligonucleotides. Downregulation of miR-9 by anti-miR-9 not only attenuated the growth-suppressive effects of curcumin on SCC-9 cells, but also re-activated Wnt/β-catenin signaling that was inhibited by curcumin. Therefore, our findings would provide a new insight into the use of curcumin against OSCC in future.

Curcumin inhibits oral squamous cell carcinoma SCC-9 cells proliferation by regulating miR-9 expression

International Nuclear Information System (INIS)

Xiao, Can; Wang, Lili; Zhu, Lifang; Zhang, Chenping; Zhou, Jianhua

2014-01-01

Highlights: • miR-9 expression level was significantly decreased in OSCC tissues. • Curcumin significantly inhibited SCC-9 cells proliferation. • miR-9 mediates the inhibition of SCC-9 proliferation by curcumin. • Curcumin suppresses Wnt/β-catenin signaling in SCC-9 cells. • miR-9 mediates the suppression of Wnt/β-catenin signaling by curcumin. - Abstract: Curcumin, a phytochemical derived from the rhizome of Curcuma longa, has shown anticancer effects against a variety of tumors. In the present study, we investigated the effects of curcumin on the miR-9 expression in oral squamous cell carcinoma (OSCC) and explored the potential relationships between miR-9 and Wnt/β-catenin pathway in curcumin-mediated OSCC inhibition in vitro. As the results shown, the expression levels of miR-9 were significantly lower in clinical OSCC specimens than those in the adjacent non-tumor tissues. Furthermore, our results indicated that curcumin inhibited OSCC cells (SCC-9 cells) proliferation through up-regulating miR-9 expression, and suppressing Wnt/β-catenin signaling by increasing the expression levels of the GSK-3β, phosphorylated GSK-3β and β-catenin, and decreasing the cyclin D1 level. Additionally, the up-regulation of miR-9 by curcumin in SCC-9 cells was significantly inhibited by delivering anti-miR-9 but not control oligonucleotides. Downregulation of miR-9 by anti-miR-9 not only attenuated the growth-suppressive effects of curcumin on SCC-9 cells, but also re-activated Wnt/β-catenin signaling that was inhibited by curcumin. Therefore, our findings would provide a new insight into the use of curcumin against OSCC in future

A structural, magnetic and Moessbauer spectral study of the magnetocaloric Mn1.1Fe0.9P1-xGex compounds

International Nuclear Information System (INIS)

Sougrati, Moulay T; Hermann, Raphael P; Grandjean, Fernande; Long, Gary J; Brueck, E; Tegus, O; Trung, N T; Buschow, K H J

2008-01-01

The structural, magnetic and Moessbauer spectral properties of the magnetocaloric Mn 1.1 Fe 0.9 P 1-x Ge x compounds, with 0.19 1.1 Fe 0.9 P 0.74 Ge 0.26 . The temperature dependence of the magnetization reveals a ferromagnetic to paramagnetic transition with a Curie temperature between approximately 250 and 330 K and hysteresis width of 10 to 4 K, for 0.19 1.1 Fe 0.9 P 0.78 Ge 0.22 shows the largest isothermal entropy change of approximately 10 J/(kgKT) at 290 K. The Moessbauer spectra have been analysed with a binomial distribution of hyperfine fields correlated with a change in isomer shift and quadrupole shift, a distribution that results from the distribution of phosphorus and germanium among the near neighbours of the iron. The coexistence of paramagnetic and magnetically ordered phases in ranges of temperature of up to 50 K around the Curie temperature is observed in the Moessbauer spectra and is associated with the first-order character of the ferromagnetic to paramagnetic transition. The temperature dependence of the weighted average hyperfine field is well fitted within the magnetostrictive model of Bean and Rodbell. Good fits of the Moessbauer spectra could only be achieved by introducing a difference between the isomer shifts in the paramagnetic and ferromagnetic phases, a difference that is related to the magnetostriction and electronic structure change.

NuSTAR OBSERVATION OF A TYPE I X-RAY BURST FROM GRS 1741.9-2853

International Nuclear Information System (INIS)

Barrière, Nicolas M.; Krivonos, Roman; Tomsick, John A.; Boggs, Steven E.; Craig, William W.; Bachetti, Matteo; Chakrabarty, Deepto; Christensen, Finn E.; Hailey, Charles J.; Mori, Kaya; Harrison, Fiona A.; Hong, Jaesub; Stern, Daniel; Zhang, William W.

2015-01-01

We report on two NuSTAR observations of GRS 1741.9-2853, a faint neutron star (NS) low-mass X-ray binary burster located 10' away from the Galactic center. NuSTAR detected the source serendipitously as it was emerging from quiescence: its luminosity was 6 × 10 34  erg s –1 on 2013 July 31 and 5 × 10 35  erg s –1 in a second observation on 2013 August 3. A bright, 800 s long, H-triggered mixed H/He thermonuclear Type I burst with mild photospheric radius expansion (PRE) was present during the second observation. Assuming that the luminosity during the PRE was at the Eddington level, an H mass fraction X = 0.7 in the atmosphere, and an NS mass M = 1.4 M ☉ , we determine a new lower limit on the distance for this source of 6.3 ± 0.5 kpc. Combining with previous upper limits, this places GRS 1741.9-2853 at a distance of 7 kpc. Energy independent (achromatic) variability is observed during the cooling of the NS, which could result from the disturbance of the inner accretion disk by the burst. The large dynamic range of this burst reveals a long power-law decay tail. We also detect, at a 95.6% confidence level (1.7σ), a narrow absorption line at 5.46 ± 0.10 keV during the PRE phase of the burst, reminiscent of the detection by Waki et al. We propose that the line, if real, is formed in the wind above the photosphere of the NS by a resonant Kα transition from H-like Cr gravitationally redshifted by a factor 1 + z = 1.09, corresponding to a radius range of 29.0-41.4 km for a mass range of 1.4-2.0 M ☉

Validation of the Patient Health Questionnaire-9 (PHQ-9) For Depression Screening in Adults with Epilepsy

Science.gov (United States)

Rathore, Jaivir S.; Jehi, Lara E.; Fan, Youran; Patel, Sima I.; Foldvary-Schaefer, Nancy; Ramirez, Maya J.; Busch, Robyn M.; Obuchowski, Nancy A.; Tesar, George E.

2015-01-01

Objective Assess accuracy and operating characteristics of the Patient Health Questionnaire-9 (PHQ-9) for depression-screening in adults with epilepsy. Methods Tertiary epilepsy center patients served as the study population with 237 agreeing to structured interview using the Mini-International Neuropsychiatric Interview (MINI), a “gold standard” instrument developed for rapid diagnosis of neuropsychiatric disorders, including major depressive disorder (MDD); 172 also completed the PHQ-9, and 127 completed both the PHQ-9 and the Neurological Disorders Depression Inventory for Epilepsy (NDDI-E) within two days of the MINI. Sensitivity, specificity, positive & negative predictive values & areas under the ROC curves for each instrument were determined. Cut-points of 10 for the PHQ-9 and 15 for the NDDI-E were used and ratings at or above the cut-points were considered screen-positive. The PHQ-9 was divided into cognitive/affective (PHQ-9/CA) and somatic (PHQ-9/S) subscales to determine comparative depression-screening accuracy. Results The calculated areas under the ROC curves for the PHQ-9 (n=172) and the PHQ-9/CA and PHQ-9/S sub-scales were 0.914, 0.924, and 0.846, respectively, with the PHQ-9 more accurate than the PHQ-9/S (p=0.002) but no different than the PHQ-9/CA (p=0.378). At cut-points of 10 and 15, respectively, the PHQ-9 had higher sensitivity (0.92 vs 0.87), but lower specificity (0.74 vs 0.89) than the NDDI-E. The areas under the ROC curves of the PHQ-9 and the NDDI-E showed similar accuracy (n=127; 0.930 vs 0.934; p=0.864). Significance The PHQ-9 is an efficient & non-proprietary depression screening instrument with excellent accuracy validated for use in adult epilepsy patients as well as multiple other medical populations. PMID:25064739

A single tyrosine of the interleukin-9 (IL-9) receptor is required for STAT activation, antiapoptotic activity, and growth regulation by IL-9.

Science.gov (United States)

Demoulin, J B; Uyttenhove, C; Van Roost, E; DeLestré, B; Donckers, D; Van Snick, J; Renauld, J C

1996-09-01

Interleukin-9 (IL-9), a T-cell-derived cytokine, interacts with a specific receptor associated with the IL-2 receptor gamma chain. In this report, we analyze the functional domains of the human IL-9 receptor transfected into mouse lymphoid cell lines. Three different functions were examined: growth stimulation in factor-dependent pro-B Ba/F3 cells, protection against dexamethasone-induced apoptosis, and Ly-6A2 induction in BW5147 lymphoma cells. The results indicated that a single tyrosine, at position 116 in the cytoplasmic domain, was required for all three activities. In addition, we observed that human IL-9 reduced the proliferation rate of transfected BW5147 cells, an effect also dependent on the same tyrosine. This amino acid was necessary for IL-9-mediated tyrosine phosphorylation of the receptor and for STAT activation but not for IRS-2/4PS activation or for JAK1 phosphorylation, which depended on a domain closer to the plasma membrane. We also showed that JAK1 was constitutively associated with the IL-9 receptor. Activated STAT complexes induced by IL-9 were found to contain STAT1, STAT3, and STAT5 transcription factors. Moreover, sequence homologies between human IL-9 receptor tyrosine 116 and tyrosines (of other receptors activating STAT3 and STAT5 were observed. Taken together, these data indicate that a single tyrosine of the IL-9 receptor, required for activation of three different STAT proteins, is necessary for distinct activities of this cytokine, including proliferative responses.

Type IX secretion system PorM and gliding machinery GldM form arches spanning the periplasmic space.

Science.gov (United States)

Leone, Philippe; Roche, Jennifer; Vincent, Maxence S; Tran, Quang Hieu; Desmyter, Aline; Cascales, Eric; Kellenberger, Christine; Cambillau, Christian; Roussel, Alain

2018-01-30

Type IX secretion system (T9SS), exclusively present in the Bacteroidetes phylum, has been studied mainly in Flavobacterium johnsoniae and Porphyromonas gingivalis. Among the 18 genes, essential for T9SS function, a group of four, porK-N (P. gingivalis) or gldK-N (F. johnsoniae) belongs to a co-transcribed operon that expresses the T9SS core membrane complex. The central component of this complex, PorM (or GldM), is anchored in the inner membrane by a trans-membrane helix and interacts through the outer membrane PorK-N complex. There is a complete lack of available atomic structures for any component of T9SS, including the PorKLMN complex. Here we report the crystal structure of the GldM and PorM periplasmic domains. Dimeric GldM and PorM, each contain four domains of ~180-Å length that span most of the periplasmic space. These and previously reported results allow us to propose a model of the T9SS core membrane complex as well as its functional behavior.

Skeleton polyhedral rearrangements of 8-alkyl-7,9-dicarba-nido-undecaborate(-1) anion to 11-alkyl-2,7-dicarba-nido-undecaborane(13) and to 9-alkyl-7,8-dicarba-nido-undecaborate(-1) anion. Molecular structure of 2,7-Me2-11-PhCH2-2,7-C2B9H10

International Nuclear Information System (INIS)

Zakharkin, K.I.; Zhigareva, G.G.; Antonovich, V.A.; Yanovskij, A.I.; Struchkov, Yu.T.

1986-01-01

Using the methods of 1 H and 11 B NMR-spectroscopy and X-ray diffraction analysis skeleton polyhedral rearrangements of carboranes are studied. During protonation of anion 8-R-7, 9-R' 2 -7, 9-C 2 B 9 H 9 - the skeleton polyhedral rearrangement in the series of nido-carboranes, resulting in 2,7-R' 2 -11-R-2, 7-C 2 B 9 H 10 (R=Me, PhCH 2 , R'=H, Me) is observed. The rearrangement is reversible. On the detachment of two protons from 2,7-Me 2 -11-PhCH 2 -2,7-C 2 B 9 H 10 and during subsequent protonation the skeleton polyhedral rearrangement with the formation of anion 9-PhCH 2 -7,8-Me 2 -7,8-C 2 B 9 H 9 - takes place

Annexin A9 (ANXA9) biomarker and therapeutic target in epithelial cancer

Science.gov (United States)

Hu, Zhi [El Cerrito, CA; Kuo, Wen-Lin [San Ramon, CA; Neve, Richard M [San Mateo, CA; Gray, Joe W [San Francisco, CA

2012-06-12

Amplification of the ANXA9 gene in human chromosomal region 1q21 in epithelial cancers indicates a likelihood of both in vivo drug resistance and metastasis, and serves as a biomarker indicating these aspects of the disease. ANXA9 can also serve as a therapeutic target. Interfering RNAs (iRNAs) (such as siRNA and miRNA) and shRNA adapted to inhibit ANXA9 expression, when formulated in a therapeutic composition, and delivered to cells of the tumor, function to treat the epithelial cancer.

Cholesterol negatively regulates IL-9-producing CD8+ T cell differentiation and antitumor activity.

Science.gov (United States)

Ma, Xingzhe; Bi, Enguang; Huang, Chunjian; Lu, Yong; Xue, Gang; Guo, Xing; Wang, Aibo; Yang, Maojie; Qian, Jianfei; Dong, Chen; Yi, Qing

2018-05-09

CD8 + T cells can be polarized into IL-9-secreting (Tc9) cells. We previously showed that adoptive therapy using tumor-specific Tc9 cells generated stronger antitumor responses in mouse melanoma than classical Tc1 cells. To understand why Tc9 cells exert stronger antitumor responses, we used gene profiling to compare Tc9 and Tc1 cells. Tc9 cells expressed different levels of cholesterol synthesis and efflux genes and possessed significantly lower cholesterol content than Tc1 cells. Unique to Tc9, but not other CD8 + or CD4 + T cell subsets, manipulating cholesterol content in polarizing Tc9 cells significantly affected IL-9 expression and Tc9 differentiation and antitumor response in vivo. Mechanistic studies showed that IL-9 was indispensable for Tc9 cell persistence and antitumor effects, and cholesterol or its derivatives inhibited IL-9 expression by activating liver X receptors (LXRs), leading to LXR Sumoylation and reduced p65 binding to Il9 promoter. Our study identifies cholesterol as a critical regulator of Tc9 cell differentiation and function. © 2018 Ma et al.

46 CFR 531.9 - Publication.

Science.gov (United States)

2010-10-01

... 46 Shipping 9 2010-10-01 2010-10-01 false Publication. 531.9 Section 531.9 Shipping FEDERAL... Publication of Essential Terms § 531.9 Publication. (a) Contents. All authorized persons who choose to file... contained in a publication widely available to the public and well known within the industry. Reference may...

Venous drainage of the dorsal sector of the liver: differences between segments I and IX. A study on corrosion casts of the human liver.

Science.gov (United States)

Gadzijev, E M; Ravnik, D; Stanisavljevic, D; Trotovsek, B

1997-01-01

The aim of this study was to determine the venous drainage of the dorsal sector of the liver in order to define the differences between segments I and IX and their implications for sectorially and segmentally oriented hepatic surgery. The study was based on corrosion casts of 61 macroscopically healthy livers. The drainage pathways of veins at least 10 mm long and 1 mm wide were evaluated and statistically analysed. On average, 9 veins drained the two segments and three veins from both segments entered the inferior vena cava. In 95% of cases the veins from segment I drained predominantly into the inferior vena cava, whereas in segment IX this pathway was dominant in only 30% of cases. In 64% of cases a vein originating in segment IX entered the right hepatic v. The difference in the venous drainage of the two segments suggests that segment IX partly belongs to the neighbouring segments and may thus be only a paracaval region of the right liver.

17 CFR 9.7 - Settlement.

Science.gov (United States)

2010-04-01

... 17 Commodity and Securities Exchanges 1 2010-04-01 2010-04-01 false Settlement. 9.7 Section 9.7... DISCIPLINARY, ACCESS DENIAL OR OTHER ADVERSE ACTIONS General Provisions § 9.7 Settlement. At any time before... accordance with § 9.20, the parties may file a stipulation for dismissal based on a settlement agreement...

Fracture behavior of unirradiated HT-9 and modified 9Cr-1Mo welds

International Nuclear Information System (INIS)

Huang, F.H.; Gelles, D.S.

1983-05-01

Fracture toughness tests on HT-9 weld and HAZ samples and modified 9Cr-1Mo weld samples were performed at 93, 205, 427 and 538 0 C. Specimens were of circular compact tension type fabricated from welded material with the notch orientation parallel to the fusion line. The test results were analyzed using the J-integral approach. The results demonstrated that the toughness of HT-9 and 9Cr-1Mo was not significantly reduced due to welding. However, the tearing modulus of the welded material was lower than that of base metal, indicating that the alloys become less resistant to crack propagation as a result of welding

Extended analysis of Br VIII and predicted trends for the n=4, Δn=0 transistions of nickel-like ions (Kr IX-Mo XV)

International Nuclear Information System (INIS)

Wyart, J.F.; Ryabtsev, A.N.

1986-01-01

More than one hundred lines of Br VIII have been classified in the spectral region 416-824 A, from which all levels of 3d 9 4d (except 1 S 0 ) have been found. The energy levels of the configurations 3d 9 4s, 3d 9 4p and 3d 9 4d have been interpreted from Zn III to Mo XV by means of the Slater-Condon theory and of generalized least squares techniques and the root mean square deviations are 8, 51 and 40 cm -1 respectively. The strongest lines of the 4s-4p and 4p-4d transitions are predicted from Kr IX to Mo XV. (orig.)

RX J1548.9+0851, a fossil cluster?

Science.gov (United States)

Eigenthaler, P.; Zeilinger, W. W.

2012-04-01

Context. Fossil galaxy groups are spatially extended X-ray sources with X-ray luminosities above L{X, bol ≥ 1042 h50-2} erg s-1 and a central elliptical galaxy dominating the optical, the second-brightest galaxy being at least 2 mag fainter in the R band. Whether these systems are a distinct class of objects resulting from exceptional formation and evolution histories is still unclear, mainly due to the small number of objects studied so far, mostly lacking spectroscopy of group members for group membership confirmation and a detailed kinematical analysis. Aims: To complement the scarce sample of spectroscopically studied fossils down to their faint galaxy populations, the fossil candidate RX J1548.9+0851 (z = 0.072) is studied in this work. Our results are compared with existing data from fossils in the literature. Methods: We use ESO VLT VIMOS multi-object spectroscopy to determine redshifts of the faint galaxy population and study the luminosity-weighted dynamics and luminosity function of the system. The full-spectrum fitting package ULySS is used to determine ages and metallicities of group members. VIMOS imaging data are used to study the morphology of the central elliptical. Results: We identify 40 group members spectroscopically within the central 300 kpc of the system and find 31 additional redshifts from the literature, resulting in a total number of 54 spectroscopically confirmed group members within 1 Mpc. RX J1548.9+0851 is made up of two bright ellipticals in the central region with a magnitude gap of Δm1,2 = 1.34 in the SDSS r' band leaving the definition of RX J1548.9+0851 being a fossil to the assumption of the virial radius. We find a luminosity-weighted velocity dispersion of 568 km s-1 and a mass of 2.5 × 1014 M⊙ for the system confirming previous studies that revealed fossils to be massive. An average mass-to-light ratio of M/L 400 M⊙/L⊙ is derived from the SDSS g', r', and i' bands. The central elliptical is well-fitted by a pure de

Tissue-specific expression of type IX collagen

International Nuclear Information System (INIS)

Nishimura, I.; Muragaki, Y.; Ninomiya, Y.; Olsen, B.R.; Hayashi, M.

1990-01-01

This paper reports on the tissue-specific expression of type IX collagen, a major component of cartilage fibrils. It contains molecules with three genetically distinct subunits. The subunits form three triple-helical (CO) domains separated by non-triple-helical (NC) sequences. One of the subunits in cartilage, α1(IX), contains a large amino-terminal globular domain, NC4, while a second subunit, α2(IX), contains a covalently attached chondroitin sulfate chain. The site of attachment for this chain is located within the non-triple-helical sequence NC3, which separates the amino-terminal and central triple-helical domains of the type IX molecules. The NC3 region is 5 amino acid residues longer in the α2(IX) chain than in the α1(IX) and α3(IX) chains. This may explain why type IX molecules tend to show a sharp angle in the NC3 region, and why monoclonal antibody molecules that are specific for the stub left after chondroitinase ABC digestion of the chondroitin sulfate side chain always are located on the outside of the angle

Investigation of alkylation and Wittig rearrangement of alkalimetal salts of 9-phenoxyfluorene

International Nuclear Information System (INIS)

Solov'yanov, A.A.; Beletskaya, I.P.; Reutov, O.A.

1985-01-01

The stability of alkai metal (Li + , Na + , K + , Cs + ) salts of 9 phenoxyfluorene to intramolecular transformation in 1.2 dimethoxiethane (DME) is studied, as well as the kinetics of alkylation of these salts by 1-butylbromide. Potassium- and cesium salts are shown to be are stable at 25 deg C. The dissociation constant of a solvate-separated ion par phenoxifluorenylcesium is equal to 4x10 -7 M. The alkylation rate constant free 9-phenoxifluorene carbonione and its cesium salts by 1-butylbromide is 2.9 and 0.057 M -1 xs -1 , respectively

The significance of MMP-9 examination in serum from embryo of gastric cancer model

International Nuclear Information System (INIS)

Liu Zhan; Zhao Xuejian; Wang Lu; Li Yulin; Zhang Lihong; Zhang Hong

2003-01-01

Objective: To investigate the changes matrix metalloproteinase-9 (MMP-9) content from sera of chick embryos during the progression of transformed models of gastric cancer cells on chorioallantoic membrane (CAM). Methods: Morphometric investigation method was used to study the tumor generation on CAM; Enzyme-linked immunosorbent assay (ELISA) method was used to test MMP-9 concentrations in chick embryos'sera transferred by cancer cells at different points of time; the relationship between MMP-9 and cancer biological characteristics was analyzed. Results: In the group of 1 x 10 6 ·ml -1 gastric cancer cells, a single clot which could be seen by naked eyes appeared at 72 hours after inoculation. With the time going on, the volumes of the clot became larger and larger, and the neovessels on CAM accumulated to the clot. In the group of 1 x 10 6 ·ml -1 gastric cancer cells, the MMP-9 content in sera extremely increased at 72 hours after inoculation and increased continuously till the maxim at 7 days after inoculation. Conclusion: The whole progression of cancer development is accompanied with the increase of MMP-9 concentration. This model is feasible to study the characteristics of gastric cancer

sup 9 sup 9 Tc atom counting by quadrupole ICP-MS. Optimisation of the instrumental response

CERN Document Server

Mas, J L; Garcia-Leon, M

2002-01-01

In this paper, an extensive work is done on the specific tune of a conventional ICP-MS for sup 9 sup 9 Tc atom counting. For this, two methods have been used and compared: the partial variable control method and the 5D Simplex method. Instrumental limits of detection of 0.2 and 0.8 ppt, respectively, were obtained. They are noticeably lower than that found with the automatic tune method of the spectrometer, 47 ppt, which shows the need of a specific tune when very low levels of sup 9 sup 9 Tc have to be determined. A study is presented on the mass interferences for sup 9 sup 9 Tc. Our experiments show that the formation of polyatomic atoms or refractory oxides as well as sup 9 sup 8 Mo hydrides seem to be irrelevant for sup 9 sup 9 Tc atom counting. The opposite occurs with the presence of isobaric interferences, i.e. sup 9 sup 9 Ru, and the effect of abundance sensitivity, or low-mass resolution, which can modify the response at m/z=99 to a non-negligible extent.

4-(9-Anthryl-1-(2-methoxyphenylspiro[azetidin-3,9′-xanthen]-2-one

Directory of Open Access Journals (Sweden)

2009-03-01

Full Text Available The stabilized conformation of the title compound, C36H25NO3, 4-(9-anthryl-1-(2-methoxyphenyl-spiro[azetidin-3,9′-xanthen]-2-one, may be compared with that of the isomeric compound 4-(9-anthryl-1-(4-methoxyphenylspiro[azetidin-3,9′-xanthen]-2-one. In the title isomer, the methoxy group is slightly twisted out of the plane of the attached benzene ring, with a C—O—C—C torsion angle of 31.5 (2°. Its β-lactam ring is essentially planar, with a maximum deviation of −0.021 (1 Å. The β-lactam ring makes dihedral angles of 18.815 (9, 83.33 (7 and 53.62 (8° with the mean planes of the benzene, xanthene and anthracene ring systems, respectively. The structure is stabilized by C—H...π, C—H...N and C—H...O interactions.

Study of the 6He+9Be and 7Be+9Be collisions

CERN Document Server

Pires, K C C; Mukha, I; Moro, A M; Gómez-Camacho, J; Lépine-Szily, A; Guimarães, V; Assunção, M; de Faria, P N; Crema, E; Barioni, A; Mendes Junior, D R; Morcelle, V; Morais, M C; Pampa Condori, O; Mukherjee, S; Huyse, M; Ivanov, O; Leash, S; Pauwels, D; Ponsaers, J; Raabe, R; Smirnov, D; Stefanescu, I; Van Duppen, P; Angulok, C; Casarejosk, E; Loiseletk, M; Ryckwaertk, G; Martel, I; Sánchez-Benítez, A M; Grigorenko, L; Timofeyuk, N K

2010-01-01

We present elastic scattering angular distributions of the 6He+9Be and 7Be+9Be reactions at Elab =16.2 MeV and Elab =23.7 MeV respectively. The 6He+9Be measurements have been performed at the Pelletron Laboratory of the Institute of Physics of the University of Sao Paulo, Brazil, using the Radioactive Ion Beams in Brasil (RIBRAS) facility and the 7Be+9Be system has beenmeasured at CRC Radioactive Beam Facility at Louvain-la-Neuve,Belgium. An OpticalModel analysis has been performed to obtain the nuclear potentials for both systems. A coupled-channel calculation was performed for the 7Be+9Be system taking into account the coupling to the first excited state and breakup channels of the 7Be nucleus. Keywords: Radioctive Beams. Exotic Nuclei. Nuclear Halo. Long range absorption. Elastic Scattering. Optical potential. Coupled channels calculations. PACS: 25.60.-t,25.60.Bx,25.70.Bc,29.38.-c,24.10.Eq

Viscous behavior of (Sn{sub 61.9}Pb{sub 38.1}){sub 100-x}RE{sub x} (x=0, 0.1, 0.3, 1 wt%) solder alloys

Energy Technology Data Exchange (ETDEWEB)

Wu Yuqin [Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University (Southern Campus), 73 Jingshi Road, Jinan 250061 (China); Bian Xiufang [Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University (Southern Campus), 73 Jingshi Road, Jinan 250061 (China)], E-mail: xfbian@sdu.edu.cn; Zhao Yan; Li Xuelian; Zhang Yanning; Tian Yongsheng; Lv Xiaoqian [Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University (Southern Campus), 73 Jingshi Road, Jinan 250061 (China)

2008-05-19

The viscous behavior of (Sn{sub 61.9}Pb{sub 38.1}){sub 100-x}RE{sub x} (x=0, 0.1, 0.3, 1 wt%) solder alloys has been investigated by a torsional oscillation viscometer. The structural transition temperature T{sup '} increases with increasing addition of RE elements. Above T{sup '}, the viscosities of melts increase with increasing addition of RE, and are fitted well with the Arrhenius equation. The time dependence of viscosity at the measured temperature below T{sup '} follows the exponential relaxation function and reflects the process of the structural transition in the melt, which can be considered as the thermodynamic equilibrium process. The thermodynamic equilibrium relaxation time {tau}{sub eq} increases with both the equilibrium viscosity {eta}{sub eq} and the discrepancy in viscosity ({delta}{eta}), between the initial state and the equilibrium state. However, it decreases with the measured temperature T. The size of clusters in the melts increases with increasing of viscosity and is restricted by the thermodynamic equilibrium conditions.

HEASARC SAOImage DS9

Data.gov (United States)

National Aeronautics and Space Administration — SAOImage DS9 is an astronomical imaging and data visualization application. DS9 supports FITS images and binary tables, multiple frame buffers, region manipulation,...

Dependency of the properties of Sr xBi yTa2O9 thin films on the Sr and Bi stoichiometry

International Nuclear Information System (INIS)

Viapiana, Matteo; Schwitters, Michael; Wouters, Dirk J.; Maes, Herman E.; Van der Biest, Omer

2005-01-01

In this study the properties of ferroelectric SBT thin films crystallized at 700 deg. C have been investigated as function of the Sr and Bi stoichiometry. A matrix of 130 nm Sr x Bi y Ta 2 O 9 films with 0.7 ≤ x ≤ 1.0 and 2.0 ≤ y ≤ 2.4 has been realized by metal-organic spin-on deposition technique on Pt/IrO 2 /Ir/TiAlN/SiO 2 /Si substrates. Within this composition range, we found that the ferroelectric properties peak into a narrow window of 0.8 ≤ x ≤ 0.9 and y ∼ 2.25 with Pr and Ec of 6.5 μC/cm 2 and 50 kV/cm, respectively (at 2.5 V). Outside this composition window, the Pr decreases while the hysteresis loop becomes slanted. For some Sr/Bi-ratios even no ferroelectricity was achieved. 2Ec-tendencies were seen as function of the x/y-ratios, too. Examination of the microstructure of the films by scanning electron microscopy showed that film grain size increased with decreasing Sr-deficiency and that nucleation increased with increasing Bi-excess. At high Sr-deficiency and low Bi-excess, no complete crystallization of the SBT film occurs. From the film morphology, also different phases can be discriminated. X-ray diffraction analysis showed a strong correlation of the film orientation with the film composition. While our results show a clear correlation of Pr, film grain size and orientation with composition, further investigations are required to clarify the relation of the hysteresis parameters with film orientation

Gas Nozzle Effect on the Deposition of Polysilicon by Monosilane Siemens Reactor

Directory of Open Access Journals (Sweden)

Seung Oh Kang

2012-01-01

Full Text Available Deposition of polysilicon (poly-Si was tried to increase productivity of poly-Si by using two different types of gas nozzle in a monosilane Bell-jar Siemens (MS-Siemens reactor. In a mass production of poly-Si, deposition rate and energy consumption are very important factors because they are main performance indicators of Siemens reactor and they are directly related with the production cost of poly-Si. Type A and B nozzles were used for investigating gas nozzle effect on the deposition of poly-Si in a MS-Siemens reactor. Nozzle design was analyzed by computation cluid dynamics (CFD. Deposition rate and energy consumption of poly-Si were increased when the type B nozzle was used. The highest deposition rate was 1 mm/h, and the lowest energy consumption was 72 kWh⋅kg-1 in this study.

Nondoped deep blue OLEDs based on Bis-(4-benzenesulfonyl-phenyl)-9-phenyl-9H-carbazoles

International Nuclear Information System (INIS)

Huang, Bin; Yin, Zhihui; Ban, Xinxin; Ma, Zhongming; Jiang, Wei; Tian, Wenwen; Yang, Min; Ye, Shanghui; Lin, Baoping; Sun, Yueming

2016-01-01

Two bipolar materials based on 9-phenylcarbazole and diphenyl sulfone for nondoped deep blue OLEDs, namely bis-(4-benzenesulfonyl-phenyl)-9-phenyl-9H-carbazoles, have been designed and synthesized by Suzuki coupling reactions. Their thermal, photophysical, and electrochemical properties have been systematically investigated. The nondoped devices using 3,6–bis–(4-benzenesulfonyl-phenyl)-9-phenyl-9H-carbazoles and 2,7-bis-(4-benzenesulfonyl-phenyl)-9-phenyl-9H-carbazoles as the emitters show deep blue emission color with peaks at 424 and 444 nm, and the Commission Internationale de l'Eclairage (CIE) coordinates of (0.177, 0.117) and (0.160, 0.117), respectively. Furthermore, these materials based devices have high color-purity with small width at half-maximum (FWHM) of 65 and 73 nm, respectively. The results provide a novel approach for the design of deep blue emitter for nondoped OLEDs.

TOGAF version 9 foundation study guide preparation for the TOGAF 9 Part 1 examination

CERN Document Server

Harrison, Rachel

2009-01-01

This document is a Study Guide for TOGAF™ 9 Foundation.It gives an overview of every learning objective for the TOGAF 9 Foundation Syllabus and in-depth coverage on preparing and taking the TOGAF 9 Part 1 Examination. It is specifically designed to help individuals prepare for certification.

CERES ERBE-like Monthly Regional Averages (ES-9) in HDF (CER_ES9_TRMM-PFM_Edition1)

Science.gov (United States)

Wielicki, Bruce A. (Principal Investigator)

The ERBE-like Monthly Regional Averages (ES-9) product contains a month of space and time averaged Clouds and the Earth's Radiant Energy System (CERES) data for a single scanner instrument. The ES-9 is also produced for combinations of scanner instruments. All instantaneous shortwave and longwave fluxes at the Top-of-the-Atmosphere (TOA) from the CERES ES-8 product for a month are sorted by 2.5-degree spatial regions, by day number, and by the local hour of observation. The mean of the instantaneous fluxes for a given region-day-hour bin is determined and recorded on the ES-9 along with other flux statistics and scene information. For each region, the daily average flux is estimated from an algorithm that uses the available hourly data, scene identification data, and diurnal models. This algorithm is 'like' the algorithm used for the Earth Radiation Budget Experiment (ERBE). The ES-9 also contains hourly average fluxes for the month and an overall monthly average for each region. These average fluxes are given for both clear-sky and total-sky scenes. The following CERES ES9 data sets are currently available: CER_ES9_FM1+FM2_Edition1 CER_ES9_PFM+FM1+FM2_Edition1 CER_ES9_PFM+FM1+FM2_Edition2 CER_ES9_PFM+FM1_Edition1 CER_ES9_PFM+FM2_Edition1 CER_ES9_PFM+FM1_Edition2 CER_ES9_PFM+FM2_Edition2 CER_ES9_TRMM-PFM_Edition1 CER_ES9_TRMM-PFM_Edition2 CER_ES9_Terra-FM1_Edition1 CER_ES9_Terra-FM2_Edition1 CER_ES9_FM1+FM2_Edition2 CER_ES9_Terra-FM1_Edition2 CER_ES9_Terra-FM2_Edition2 CER_ES9_Aqua-FM3_Edition1 CER_ES9_Aqua-FM4_Edition1 CER_ES9_FM1+FM2+FM3+FM4_Edition1 CER_ES9_Aqua-FM3_Edition2 CER_ES9_Aqua-FM4_Edition2 CER_ES9_FM1+FM3_Edition2 CER_ES9_FM1+FM4_Edition2 CER_ES9_Aqua-FM3_Edition1-CV CER_ES9_Aqua-FM4_Edition1-CV CER_ES9_Terra-FM1_Edition1-CV CER_ES9_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1998-01-01; Stop_Date=1998-08-31] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost

Volume 9 No. 9 December 2009 1845 URINARY ...