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Sample records for 2 dsup 1

  1. Observation by two-photon laser spectroscopy of the 4d{sup 10}5s {sup 2}S{sub 1/2}{yields}4d{sup 9}5s{sup 2} {sup 2}D{sub 5/2} clock transition in atomic silver

    SciTech Connect

    Badr, T.; Plimmer, M. D.; Juncar, P.; Himbert, M. E.; Louyer, Y.; Knight, D. J. E.

    2006-12-15

    We report the observation of the very narrow 4d{sup 10}5s {sup 2}S{sub 1/2}{yields}4d{sup 9}5s{sup 2} {sup 2}D{sub 5/2} transition in atomic silver. The frequencies of the hyperfine components in {sup 107}Ag and {sup 109}Ag have been measured using Doppler-free two-photon laser spectroscopy of a thermal beam and heterodyne calibration with respect to the a{sub 1} component of the 62P(4-5) line in molecular iodine near 661 nm. For the center of gravity of a mixture of natural abundance, we deduce the value 906 641 295.77(19) MHz. For the isotope shift, we obtain {nu}({sup 109}Ag)-{nu}({sup 107}Ag)=564.15(37) MHz, from which we deduce the frequency and isotope shift of the 4d{sup 10}5s {sup 2}S{sub 1/2}{yields}4d{sup 10}6p {sup 2}P{sub 3/2} transition at 206 nm.

  2. Doubly-excited {sup 1,3}D{sup e} resonance states of two-electron positive ions Li{sup +} and Be{sup 2+} in Debye plasmas

    SciTech Connect

    Kar, Sabyasachi; Wang, Yang; Jiang, Zishi; Li, Shuxia; Ratnavelu, K.

    2014-01-15

    We investigate the bound {sup 1,3}D states and the doubly-excited {sup 1,3}D{sup e} resonance states of two-electron positive ions Li{sup +} and Be{sup 2+} by employing correlated exponential wave functions. In the framework of the stabilization method, we are able to extract three series (2pnp, 2snd, 2pnf) of {sup 1}D{sup e} resonances and two series (2pnp, 2snd) of {sup 3}D{sup e} resonances below the N = 2 threshold. The {sup 1,3}D{sup e} resonance parameters (resonance energies and widths) for Li{sup +} and Be{sup 2+} along with the bound-excited 1s3d {sup 1,3}D state energies are reported for the first time as functions of the screening parameter. Accurate resonance energies and widths are also reported for Li{sup +} and Be{sup 2+} in vacuum. For free-atomic cases, comparisons are made with the reported results and few resonance states are reported for the first time.

  3. Isotope shifts of the 6d{sup 2} D{sub 3/2}-7 p{sup 2} P{sub 1/2} transition in trapped short-lived {sup 209-214}Ra{sup +}

    SciTech Connect

    Giri, G. S.; Versolato, O. O.; Berg, J. E. van den; Boell, O.; Dammalapati, U.; Hoek, D. J. van der; Jungmann, K.; Kruithof, W. L.; Mueller, S.; Nunez Portela, M.; Onderwater, C. J. G.; Santra, B.; Timmermans, R. G. E.; Wansbeek, L. W.; Willmann, L.; Wilschut, H. W.

    2011-08-15

    Laser spectroscopy of short-lived radium isotopes in a linear Paul trap has been performed. The isotope shifts of the 6d{sup 2} D{sub 3/2} -7 p{sup 2} P{sub 1/2} transition in {sup 209-214}Ra{sup +}, which are sensitive to the short-range part of the atomic wave functions, were measured. The results are essential experimental input for improving the precision of atomic structure calculations. This is indispensable for parity violation in Ra{sup +} aiming at the determination of the weak mixing angle.

  4. Submillimeter laboratory identification of CH{sup +} and CH{sub 2}D{sup +}

    SciTech Connect

    Amano, T.

    2015-01-22

    Laboratory identification of two basic and important interstellar molecular ions is presented. The J = 1 - 0 rotational transition of {sup 12}CH{sup +} together with those of {sup 13}CH{sup +} and {sup 12}CD{sup +} was observed in the laboratory. The newly obtained frequencies were found to be different from those reported previously. Various experimental evidences firmly support the new measurements. In addition, the Zeeman effect and the spin-rotation hyperfine interaction enforce the laboratory identification with no ambiguity. Rotational lines of CH{sub 2}D{sup +} were observed in the submillimeter-wave region. This laboratory observation is consistent with a recent tentative identification of CH{sub 2}D{sup +} toward Ori IRc2.

  5. H{sub 2}D{sup +} IN THE HIGH-MASS STAR-FORMING REGION CYGNUS X

    SciTech Connect

    Pillai, T.; Lis, D. C.; Caselli, P.; Kauffmann, J.; Zhang, Q.; Thompson, M. A.

    2012-06-01

    H{sub 2}D{sup +} is a primary ion that dominates the gas-phase chemistry of cold dense gas. Therefore, it is hailed as a unique tool in probing the earliest, prestellar phase of star formation. Observationally, its abundance and distribution is, however, just beginning to be understood in low-mass prestellar and cluster-forming cores. In high-mass star-forming regions, H{sub 2}D{sup +} has been detected only in two cores, and its spatial distribution remains unknown. Here, we present the first map of the ortho-H{sub 2}D{sup +} J{sub k{sup +},k{sup -}} = 1{sub 1,0} {yields} 1{sub 1,1} and N{sub 2}H{sup +} 4-3 transition in the DR21 filament of Cygnus X with the James Clerk Maxwell Telescope, and N{sub 2}D{sup +} 3-2 and dust continuum with the Submillimeter Array. We have discovered five very extended ({<=}34, 000 AU diameter) weak structures in H{sub 2}D{sup +} in the vicinity of, but distinctly offset from, embedded protostars. More surprisingly, the H{sub 2}D{sup +} peak is not associated with either a dust continuum or N{sub 2}D{sup +} peak. We have therefore uncovered extended massive cold dense gas that was undetected with previous molecular line and dust continuum surveys of the region. This work also shows that our picture of the structure of cores is too simplistic for cluster-forming cores and needs to be refined: neither dust continuum with existing capabilities nor emission in tracers like N{sub 2}D{sup +} can provide a complete census of the total prestellar gas in such regions. Sensitive H{sub 2}D{sup +} mapping of the entire DR21 filament is likely to discover more of such cold quiescent gas reservoirs in an otherwise active high-mass star-forming region.

  6. Experimental and theoretical investigations of the reactions NH(X {sup 3}{sigma}{sup -})+D({sup 2}S){yields}ND(X {sup 3}{sigma}{sup -})+H({sup 2}S) and NH(X {sup 3}{sigma}{sup -})+D({sup 2}S){yields}N({sup 4}S)+HD(X {sup 1}{sigma}{sub g}{sup +})

    SciTech Connect

    Qu, Z.-W.; Zhu, H.; Schinke, R.; Adam, L.; Hack, W.

    2005-05-22

    The rate coefficient of the reaction NH(X {sup 3}{sigma}{sup -})+D({sup 2}S){yields}{sup k{sub 1}}products (1) is determined in a quasistatic laser-flash photolysis, laser-induced fluorescence system at low pressures. The NH(X) radicals are produced by quenching of NH(a {sup 1}{delta}) (obtained in the photolysis of HN{sub 3}) with Xe and the D atoms are generated in a D{sub 2}/He microwave discharge. The NH(X) concentration profile is measured in the presence of a large excess of D atoms. The room-temperature rate coefficient is determined to be k{sub 1}=(3.9{+-}1.5)x10{sup 13} cm{sup 3} mol{sup -1} s{sup -1}. The rate coefficient k{sub 1} is the sum of the two rate coefficients, k{sub 1a} and k{sub 1b}, which correspond to the reactions NH(X {sup 3}{sigma}{sup -})+D({sup 2}S){yields}{sup k{sub 1a}}ND(X {sup 3}{sigma}{sup -})+H({sup 2}S) (1a) and NH(X {sup 3}{sigma}{sup -})+D({sup 2}S){yields}{sup k{sub 1b}}N({sup 4}S)+HD(X {sup 1}{sigma}{sub g}{sup +}) (1b), respectively. The first reaction proceeds via the {sup 2}A{sup ''} ground state of NH{sub 2} whereas the second one proceeds in the {sup 4}A{sup ''} state. A global potential energy surface is constructed for the {sup 2}A{sup ''} state using the internally contracted multireference configuration interaction method and the augmented correlation consistent polarized valence quadrupte zeta atomic basis. This potential energy surface is used in classical trajectory calculations to determine k{sub 1a}. Similar trajectory calculations are performed for reaction (1b) employing a previously calculated potential for the {sup 4}A{sup ''} state. The calculated room-temperature rate coefficient is k{sub 1}=4.1x10{sup 13} cm{sup 3} mol{sup -1} s{sup -1} with k{sub 1a}=4.0x10{sup 13} cm{sup 3} mol{sup -1} s{sup -1} and k{sub 1b}=9.1x10{sup 11} cm{sup 3} mol{sup -1} s{sup -1}. The theoretically determined k{sub 1} shows a very weak positive temperature dependence in the range 250{<=}T/K{<=}1000. Despite the deep potential

  7. Non-factorizable contributions to B{sub d}{sup 0} {yields} D{sub s}{sup (*)}D{sub s}{sup (*)} from chiral loops and tree level 1/Nc terms

    SciTech Connect

    Eeg, J. O.; Fajfer, S.; Prapotnik Brdnik, A.

    2006-01-12

    We point out that the amplitudes for the decays B-bar{sup 0} {yields} D{sub s}{sup +}D{sub s}{sup -} and B-bar{sub s}{sup 0} {yields} D{sup +}D{sup -} have no factorizable contributions. If one or two of the D-mesons in the final state are vectors (i.e D* 's) there are relatively small factorizable contributions through the annihilation mechanism. The dominant contributions to the decay amplitudes arise from chiral loop contributions and 1/Nc suppressed tree level. We predict that the branching ratios for the processes B-bar{sub d}{sup 0} {yields} D{sub s}{sup +}D{sub s}{sup -}, B-bar{sub d}{sup 0} {yields} D{sub s}{sup +}*D{sub s}{sup -} and B-bar{sub d}{sup 0} {yields} D{sub s}{sup +}D{sub s}{sup -}* are all of order (2 - 3) x 10-4, while B-bar{sub s}{sup 0} {yields} D{sub d}{sup +}D{sub d}{sup -}, B-bar{sub s}{sup 0} {yields} D{sub d}{sup +}*D{sub d}{sup -} and B-bar{sub s}{sup 0} {yields} D{sub d}{sup +}D{sub d}{sup -}* are of order (4 - 7) x 10-3. If both D-mesons in the final state are D*'s, we obtain branching ratios of order two times bigger.

  8. revealing H{sub 2}D{sup +} depletion and compact structure in starless and protostellar cores with ALMA

    SciTech Connect

    Friesen, R. K.; Di Francesco, J.; Bourke, T. L.; Caselli, P.; Jørgensen, J. K.; Pineda, J. E.; Wong, M.

    2014-12-10

    We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the submillimeter dust continuum and H{sub 2}D{sup +} 1{sub 10}-1{sub 11} emission toward two evolved, potentially protostellar cores within the Ophiuchus molecular cloud, Oph A SM1 and SM1N. The data reveal small-scale condensations within both cores, with mass upper limits of M ≲ 0.02 M {sub ☉} (∼20 M {sub Jup}). The SM1 condensation is consistent with a nearly symmetric Gaussian source with a width of only 37 AU. The SM1N condensation is elongated and extends 500 AU along its major axis. No evidence for substructure is seen in either source. A Jeans analysis indicates that these sources are unlikely to fragment, suggesting that both will form single stars. H{sub 2}D{sup +} is only detected toward SM1N, offset from the continuum peak by ∼150-200 AU. This offset may be due to either heating from an undetected, young, low-luminosity protostellar source or first hydrostatic core, or HD (and consequently H{sub 2}D{sup +}) depletion in the cold center of the condensation. We propose that SM1 is protostellar and that the condensation detected by ALMA is a warm (T ∼ 30-50 K) accretion disk. The less concentrated emission of the SM1N condensation suggests that it is still starless, but we cannot rule out the presence of a low-luminosity source, perhaps surrounded by a pseudodisk. These data observationally reveal the earliest stages of the formation of circumstellar accretion regions and agree with theoretical predictions that disk formation can occur very early in the star formation process, coeval with or just after the formation of a first hydrostatic core or protostar.

  9. Electron collisions with Fe-peak elements: Forbidden transitions between the low lying valence states 3d{sup 6}, 3d{sup 5}4s, and 3d{sup 5}4p of Fe III

    SciTech Connect

    McLaughlin, B.M. . E-mail: b.mclaughlin@qub.ac.uk; Scott, M.P.; Sunderland, A.G.; Noble, C.J.; Burke, V.M.; Ramsbottom, C.A.; Reid, R.H.G.; Hibbert, A.; Bell, K.L.; Burke, P.G.

    2007-01-15

    Effective collision strengths are presented for the Fe-peak element Fe III at electron temperatures (T {sub e} in degrees Kelvin) in the range 2 x 10{sup 3} to 1 x 10{sup 6}. Forbidden transitions results are given between the 3d{sup 6}, 3d{sup 5}4s, and the 3d{sup 5}4p manifolds applicable to the modeling of laboratory and astrophysical plasmas.

  10. Measurement of time dependent B{sub d}{sup 0} {bar B}{sub d}{sup 0} mixing parameter using opposite side lepton and D* meson in p{bar p} collisions at {radical}s = 1.8 TeV

    SciTech Connect

    Vandenbrink, S.C.

    1998-01-13

    This thesis presents the results from the investigation of time dependent B{sub d}{sup 0} {bar B}{sub d}{sup 0} mixing in B {yields} lepton X, B{sub d}{sup 0} {yields} D*{sup -} {yields} {bar D}{sup 0} {pi}{sup -}, {bar D}{sup 0} {yields} K{sup +} {pi}{sup -} channel in p{bar p} collisions at {radical}s = 1.8 TeV using 110 pb{sup -1} data collected with the CDF detector at the Fermilab Tevatron Collider. The {bar D}{sup 0} vertex is reconstructed. The B{sub d}{sup 0} decay length is estimated using the distance from the primary vertex to the measured position of the D{sup 0} vertex. The B{sup 0} momentum is estimated using the D{sup 0} momentum and a kinematic correction factor from Monte Carlo. With the dilution floating, {Delta}M{sub d} = 0.55 {+-}{sub 0.16}{sup 0.15} (stat) {+-} 0.06 (syst)ps{sup -1} is measured.

  11. Syntheses, structures and photoluminescent properties of three d{sup 10} coordination architectures based on in-situ 1,3,5-triazine derivatives

    SciTech Connect

    Xiao, Changyu; Li, Yamin; Lun, Huijie; Cui, Caiyan; Xu, Yanqing

    2013-12-15

    In the presence of aromatic carboxylic acids, three new d{sup 10} transition metal coordination polymers, [Ag(PAHT)]{sub n}(1), [Ag{sub 2}(HCA)]{sub n}(2) and [Cu{sub 6}(CA){sub 2}(H{sub 2}O)]{sub n}(3) (HPAHT=2-phenyl-4-amino-6-hydroxy-1,3,5-triazine, H{sub 3}CA=cyanuric acid) have been synthesized based on in-situ 1,3,5-triazine derivatives resulting from 2,4-diamino-6-phenyl-1,3,5-triazine, 2-chloro-4,6-diamino-1,3,5-triazine and melamine under hydrothermal conditions. Complexes 1–3 have been characterized by single-crystal X-ray diffraction, IR spectra, elemental analysis and thermogravimetric analysis (TGA). The compound 1 exhibits a uninodal three-connected 3D network with a rare lig LiGe type topology, which contains right-handed and left-handed [Ag(PAHT)]{sub n} helical chains. For compound 2, the 3D network is comprised of 2D sheet by strongly Ag–O and weakly Ag(I)…Ag(I) interactions. In compound 3, it is infrequently observed that dodecanuclear copper(I) units as secondary building units (SBUs) construct 3D network by the ligands CA{sup 3−} with a rare uninodal 10-connected bct topology (3{sup 12}.4{sup 28}.5{sup 5}). The photoluminescent properties of three compounds have also been measured. - Graphical abstract: Three d{sup 10} transition metal coordination polymers 1–3 have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction, IR spectra, elemental analysis, photoluminescent spectra and thermogravimetric analysis (TGA). - Highlights: • The compound 1 exhibits a new 3D network with two kinds of single helical chains. • New 3D d{sup 10} transition metal coordination polymers. • The photoluminescent properties have been measured.

  12. Energy level properties of 4p{sup 6}4d{sup 3}, 4p{sup 6}4d{sup 2}4f, and 4p{sup 5}4d{sup 4} configurations of the W{sup 35+} ion

    SciTech Connect

    Bogdanovich, P. Kisielius, R.

    2014-11-15

    The ab initio quasirelativistic Hartree–Fock method developed specifically for the calculation of spectroscopic parameters of heavy atoms and highly charged ions was used to derive spectral data for the multicharged tungsten ion W{sup 35+}. The configuration interaction method was applied to include the electron-correlation effects. The relativistic effects were taken into account in the Breit–Pauli approximation for quasirelativistic Hartree–Fock radial orbitals. The energy level spectra, radiative lifetimes τ, and Lande g-factors have been calculated for the 4p{sup 6}4d{sup 3}, 4p{sup 6}4d{sup 2}4f, and 4p{sup 5}4d{sup 4} configurations of the W{sup 35+} ion.

  13. Frustrated tunneling ionization during laser-induced D{sub 2} fragmentation: Detection of excited metastable D{sup *} atoms

    SciTech Connect

    McKenna, J.; Zeng, S.; Hua, J. J.; Sayler, A. M.; Zohrabi, M.; Johnson, Nora G.; Gaire, B.; Carnes, K. D.; Esry, B. D.; Ben-Itzhak, I.

    2011-10-15

    In a recent Letter, Manschwetus et al.[Phys. Rev. Lett. 102, 113002 (2009)] reported evidence of electron recapture during strong-field fragmentation of H{sub 2}--explained using a frustrated tunneling ionization model. Unusually, the signature of this process was detection of excited H{sup *} atoms. We report here an extensive study of this process in D{sub 2}. Our measurements encompass a study of the pulse duration, intensity, ellipticity, and angular distribution dependence of D{sup *} formation. While we find that the mechanism suggested by Manschwetus et al. is consistent with our experimental data, our theoretical work shows that electron recollision excitation cannot be completely ruled out as an alternative mechanism for D{sup *} production.

  14. PRODUCT BRANCHING RATIOS OF THE REACTION OF CO WITH H{sup +} {sub 3} AND H{sub 2}D{sup +}

    SciTech Connect

    Yu Huagen

    2009-11-20

    The reaction of CO with H{sup +} {sub 3} and H{sub 2}D{sup +} has been studied to investigate thermal rate coefficients and product branching ratios in the temperature range [20, 350] K, by using a direct ab initio molecular dynamics method. In trajectory simulations, the energies and forces are calculated using a scaling all correlation second-order Mphiller-Plesset perturbation theory (SAC-MP2) method with the correlation consistent polarized valence triplet-zeta basis (cc-pVTZ). Results show that total thermal rate coefficients for both the CO + H{sup +} {sub 3}and the CO + H{sub 2}D{sup +} reactions have a weakly positive temperature dependence. At room temperature, the rate coefficients are predicted to be (1.42 +- 0.03) x 10{sup -9} cm{sup 3} molecule{sup -1} s{sup -1} with a product branching ratio of [HOC{sup +}]/[HCO{sup +}] = 0.36 +- 0.01 for the CO + H{sup +} {sub 3} reaction, and (1.26 +- 0.03) x 10{sup -9} cm{sup 3} molecule{sup -1} s{sup -1} with the product branching ratios: 0.37 +- 0.01 (([HOC{sup +}] + [DOC{sup +}])/([HCO{sup +}] + [DOC{sup +}])), 0.54 +- 0.02 ([DCO{sup +}]/[HCO{sup +}]), and 0.49 +- 0.02 ([DOC{sup +}]/[HOC{sup +}]) for CO + H{sub 2}D{sup +}. The product branching ratios have a noticeable temperature dependence as well as a pronounced isotopic effect for the H/DOC{sup +} product channel.

  15. Studies on the double-{beta} decay nucleus {sup 64}Zn using the (d,{sup 2}He) reaction

    SciTech Connect

    Grewe, E.-W.; Baeumer, C.; Dohmann, H.; Frekers, D.; Hollstein, S.; Rakers, S.; Thies, J. H.; Harakeh, M. N.; Berg, A. M. van den; Woertche, H. J.; Johansson, H.; Martinez-Pinedo, G.; Petermann, I.; Sieja, K.; Simon, H.; Langanke, K.; Nowacki, F.; Popescu, L.; Savran, D.; Zilges, A.

    2008-06-15

    The (d,{sup 2}He) charge-exchange reaction on the double-{beta} decay ({beta}{beta}) nucleus {sup 64}Zn has been studied at an incident energy of 183 MeV. The two protons in the {sup 1}S{sub 0} state (indicated as {sup 2}He) were both momentum analyzed and detected simultaneously by the BBS magnetic spectrometer and its position-sensitive detector. {sup 2}He spectra with a resolution of about 115 keV (FWHM) have been obtained allowing identification of many levels in the residual nucleus {sup 64}Cu with high precision. {sup 64}Zn is one of the rare cases undergoing a {beta}{beta} decay in {beta}{sup +} direction. In the experiment presented here, Gamow-Teller (GT{sup +}) transition strengths have been extracted. Together with the GT{sup -} transition strengths from {sup 64}Ni({sup 3}He,t) data to the same intermediate nucleus {sup 64}Cu, the nuclear matrix elements of the {beta}{beta} decay of {sup 64}Zn have been evaluated. Finally, the GT{sup {+-}} distributions are compared with shell-model calculations and a critical assessment is given of the various residual interactions presently employed for the pf shell.

  16. Measurement of the B[sub d][sup 0][bar B][sub d][sup 0] oscillation frequency using dimuon data in p[bar p] collisions at [radical] (s) =1. 8 TeV

    SciTech Connect

    Blair, R.E.; Byrum, K.L.; Kovacs, E.; Kuhlmann, S.E.; LeCompte, T.; Nodulman, L. ); Breccia, L.; Brunetti, R.; Deninno, M.; Fiori, I.; Mazzanti, P. ); Behrends, S.; Bensinger, J.; Blocker, C.; Kirk, M.; Kirsch, L.; Lamoureux, J.I.; Niu, H. ); Bonushkin, Y.; Hauser, J.; Lindgren, M. ); Ashmanskas, W.; Berryhill, J.; Contreras, M.; Culbertson, R.; Frisch, H.; Grosso-Pilcher, C.; Nakaya, T. ); Benjamin, D.; Cronin-Hennessy, D.; Dittmann, J.R.; Goshaw, A.T.; Khazins, D.; Kowald, W.; Lee, A.M. IV; Oh, S.H. ); Albrow, M.G.; Atac, M.; Beretvas, A.; Berge, J.P.

    1999-09-01

    We present a measurement of the mass difference [Delta]m[sub d] of the two B[sub d][sup 0] mass eigenstates. We use a flavor tagging method based on the lepton charge, in a sample of events with two muons at low transverse momentum. The sample corresponds to an integrated luminosity of 90 pb[sup [minus]1] collected by the Collider Detector at Fermilab. The result obtained is [Delta]m[sub d]=0.503[plus minus]0.064(stat)[plus minus]0.071(syst) ps[sup [minus]1]. thinsp [copyright] [ital 1999] [ital The American Physical Society

  17. Measurement of the B{sub d}{sup 0}{bar B}{sub d}{sup 0} oscillation frequency using dimuon data in p{bar p} collisions at {radical} (s) =1.8 TeV

    SciTech Connect

    Blair, R.E.; Byrum, K.L.; Kovacs, E.; Kuhlmann, S.E.; LeCompte, T.; Nodulman, L.; Breccia, L.; Brunetti, R.; Deninno, M.; Fiori, I.; Mazzanti, P.; Behrends, S.; Bensinger, J.; Blocker, C.; Kirk, M.; Kirsch, L.; Lamoureux, J.I.; Niu, H.; Bonushkin, Y.; Hauser, J.; Lindgren, M.; Ashmanskas, W.; Berryhill, J.; Contreras, M.; Culbertson, R.; Frisch, H.; Grosso-Pilcher, C.; Nakaya, T.; Benjamin, D.; Cronin-Hennessy, D.; Dittmann, J.R.; Goshaw, A.T.; Khazins, D.; Kowald, W.; Lee, A.M. IV; Oh, S.H.; Albrow, M.G.; Atac, M.; Beretvas, A.; Berge, J.P.; Biery, K.; Binkley, M.; Buckley-Geer, E.; Byon-Wagner, A.; Chlebana, F.; Cihangir, S.; Cooper, J.; DeJongh, F.; Demina, R.; Derwent, P.F.; Elias, J.E.; Erdmann, W.; Flaugher, B.; Foster, G.W.; Freeman, J.; Geer, S.; Hahn, S.R.; Harris, R.M.; Incandela, J.; Jensen, H.; Joshi, U.; Kennedy, R.D.; Kephart, R.; Lammel, S.; Lewis, J.D.; Lukens, P.; Maeshima, K.; Marriner, J.P.; Miao, T.; Mukherjee, A.; Nelson, C.; Newman-Holmes, C.; Klimenko, S.; Konigsberg, J.; Korytov, A.; Nomerotski, A.; Barone, M.; Bertolucci, S.; Cordelli, M.; DellAgnello, S.; Giromini, P.; Happacher, F.; Miscetti, S.; Clark, A.G.; Couyoumtzelis, C.; Kambara, H.; Baumann, T.; Burkett, K.; Franklin, M.; Gordon, A.; and others

    1999-09-01

    We present a measurement of the mass difference {Delta}m{sub d} of the two B{sub d}{sup 0} mass eigenstates. We use a flavor tagging method based on the lepton charge, in a sample of events with two muons at low transverse momentum. The sample corresponds to an integrated luminosity of 90 pb{sup {minus}1} collected by the Collider Detector at Fermilab. The result obtained is {Delta}m{sub d}=0.503{plus_minus}0.064(stat){plus_minus}0.071(syst) ps{sup {minus}1}. thinsp {copyright} {ital 1999} {ital The American Physical Society}

  18. IMPROVED DETERMINATION OF THE 1{sub 0}-0{sub 0} ROTATIONAL FREQUENCY OF NH{sub 3}D{sup +} FROM THE HIGH-RESOLUTION SPECTRUM OF THE {nu}{sub 4} INFRARED BAND

    SciTech Connect

    Domenech, J. L.; Cueto, M.; Herrero, V. J.; Tanarro, I.; Tercero, B.; Cernicharo, J.; Fuente, A.

    2013-07-01

    The high-resolution spectrum of the {nu}{sub 4} band of NH{sub 3}D{sup +} has been measured by difference frequency IR laser spectroscopy in a multipass hollow cathode discharge cell. From the set of molecular constants obtained from the analysis of the spectrum, a value of 262817 {+-} 6 MHz ({+-}3{sigma}) has been derived for the frequency of the 1{sub 0}-0{sub 0} rotational transition. This value supports the assignment to NH{sub 3}D{sup +} of lines at 262816.7 MHz recorded in radio astronomy observations in Orion-IRc2 and the cold prestellar core B1-bS.

  19. Expression, refolding and crystallization of murine MHC class I H-2D{sup b} in complex with human β{sub 2}-microglobulin

    SciTech Connect

    Sandalova, Tatyana; Michaëlsson, Jakob; Harris, Robert A.; Ljunggren, Hans-Gustaf; Kärre, Klas; Schneider, Gunter; Achour, Adnane

    2005-12-01

    Mouse MHC class I H-2Db in complex with human β2m and the LCMV-derived peptide gp33 has been produced and crystallized. Resolution of the structure of this complex combined with the structural comparison with the previously solved crystal structure of H-2Db/mβ2m/gp33 should lead to a better understanding of how the β2m subunit affects the overall conformation of MHC complexes as well as the stability of the presented peptides. β{sub 2}-Microglobulin (β{sub 2}m) is non-covalently linked to the major histocompatibility (MHC) class I heavy chain and interacts with CD8 and Ly49 receptors. Murine MHC class I can bind human β{sub 2}m (hβ{sub 2}m) and such hybrid molecules are often used in structural and functional studies. The replacement of mouse β{sub 2}m (mβ{sub 2}m) by hβ{sub 2}m has important functional consequences for MHC class I complex stability and specificity, but the structural basis for this is unknown. To investigate the impact of species-specific β{sub 2}m subunits on MHC class I conformation, murine MHC class I H-2D{sup b} in complex with hβ{sub 2}m and the peptide gp33 derived from lymphocytic choriomeningitis virus (LCMV) has been expressed, refolded in vitro and crystallized. Crystals containing two complexes per asymmetric unit and belonging to the space group P2{sub 1}, with unit-cell parameters a = 68.1, b = 65.2, c = 101.9 Å, β = 102.4°, were obtained.

  20. D{sup 0}-{anti D}{sup 0} mixing and doubly Cabibbo-suppressed decays of the D{sup +}

    SciTech Connect

    Fermilab E791 Collaboration

    1994-07-01

    This report summarizes results from Fermilab experiment E791 on D{sup 0}-{anti D}{sup 0} mixing and doubly Cabibbo-suppressed decays of the D{sup +} meson. In order to search for D{sup 0}-{anti D}{sup 0} mixing, the authors use only D{sup 0} mesons from D{sup *+} decays in which case the charge of the pion from the D{sup *+} decay identifies the charm quantum number of the D{sup 0} at birth. When the D{sup 0} decays, the charge of the kaon identifies the charm quantum number and this way one can tell if mixing has occurred. This kind of search can be carried out by CLEO II as well and their conclusion was that there is some evidence of a wrong sign signal (0.77 {+-} 0.25 {+-} 0.25)% of the right sign signal. However, because of a lack of lifetime information, they cannot distinguish between doubly Cabibbo-suppressed decays which are expected at the level of the observed signal and mixing. They use their excellent lifetime sensitivity to obtain separate limits. During the past year, the authors have been working on extracting D{sup +} doubly Cabibbo-suppressed decay signals from E791`s data sample. These decays are interesting both because they have never been observed and because definite predictions have been made about their rates, based on models of D mesons and their decay mechanisms. Preliminary analyses of 1/3 of the data have now been completed. Figure 3 shows the Cabibbo-favored signal D{sup +} {yields} K{sup {minus}}{pi}{sup +}{pi}{sup +} and the next figure shows the signal in the doubly Cabibbo-suppressed mode D{sup +} {yields} K{sup +}{pi}{sup {minus}}{pi}{sup {minus}}.

  1. Vibrationally enhanced charge transfer and mode/bond-specific H{sup +} and D{sup +} transfer in the reaction of HOD{sup +} with N{sub 2}O

    SciTech Connect

    Bell, David M.; Anderson, Scott L.

    2013-09-21

    The reaction of HOD{sup +} with N{sub 2}O was studied over the collision energy (E{sub col}) range from 0.20 eV to 2.88 eV, for HOD{sup +} in its ground state and in each of its fundamental vibrational states: bend (010), OD stretch (100), and OH stretch (001). The dominant reaction at low E{sub col} is H{sup +} and D{sup +} transfer, but charge transfer becomes dominant for E{sub col} > 0.5 eV. Increasing E{sub col} enhances charge transfer only in the threshold region (E{sub col} < 1 eV), but all modes of HOD{sup +} vibrational excitation enhance this channel over the entire energy range, by up to a factor of three. For reaction of ground state HOD{sup +}, the H{sup +} and D{sup +} transfer channels have similar cross sections, enhanced by increasing collision energy for E{sub col} < 0.3 eV, but suppressed by E{sub col} at higher energies. OD stretch excitation enhances D{sup +} transfer by over a factor of 2, but has little effect on H{sup +} transfer, except at low E{sub col} where a modest enhancement is observed. Excitation of the OH stretch enhances H{sup +} transfer by up to a factor of 2.5, but actually suppresses D{sup +} transfer over most of the E{sub col} range. Excitation of the bend mode results in ∼60% enhancement of both H{sup +} and D{sup +} transfer at low E{sub col} but has little effect at higher energies. Recoil velocity distributions at high E{sub col} are strongly backscattered in the center-of-mass frame, indicating direct reaction dominated by large impact parameter collisions. At low E{sub col} the distributions are compatible with mediation by a short-lived collision complex. Ab initio calculations find several complexes that may be important in this context, and RRKM calculations predict lifetimes and decay branching that is consistent with observations. The recoil velocity distributions show that HOD{sup +} vibrational excitation enhances reactivity in all collisions at low E{sub col}, while for high E{sub col} with enhancement comes

  2. The (d,{sup 2}He) reaction on {sup 76}Se and the double-{beta}-decay matrix elements for A=76

    SciTech Connect

    Grewe, E.-W.; Baeumer, C.; Dohmann, H.; Frekers, D.; Hollstein, S.; Rakers, S.; Thies, J. H.; Harakeh, M. N.; Berg, A. M. van den; Woertche, H. J.; Johansson, H.; Simon, H.; Popescu, L.; Savran, D.; Zilges, A.

    2008-10-15

    The (d,{sup 2}He) charge-exchange reaction on {sup 76}Se was studied at an incident energy of 183 MeV. The outgoing two protons in the {sup 1}S{sub 0} state, referred to as {sup 2}He, were both momentum analyzed and detected by the same spectrometer and detector. The experiment was performed at KVI, Groningen, using the magnetic spectrometer BBS at three angular positions: 0 deg., 2.5 deg., and 5 deg. Excitation-energy spectra of the residual nucleus {sup 76}As were obtained with an energy resolution of about 120 keV (FWHM). Gamow-Teller (GT{sup +}) transition strengths were extracted up to 5 MeV and compared with those from an (n,p) experiment at low resolution. Together with the GT{sup -} transition strengths from the {sup 76}Ge(p,n) experiment leading to the same intermediate nucleus, the nuclear matrix element of the two-neutrino double-{beta} decay of {sup 76}Ge was evaluated.

  3. FORMATION OF D{sub 2}-WATER AND D{sub 2}-CARBONIC ACID IN OXYGEN-RICH SOLAR SYSTEM ICES VIA D{sup +}{sub 2} IRRADIATION

    SciTech Connect

    Ennis, Courtney; Bennett, Chris J.; Jones, Brant M.; Kaiser, Ralf I.

    2011-06-01

    Molecular oxygen (O{sub 2}) and carbon dioxide (CO{sub 2}) ices were irradiated with energetic D{sup +}{sub 2} ions to simulate the exposure of oxygen-bearing solar system ices to magnetospheric H{sup +}{sub 2} and H{sup +} ions and energetic protons from the solar wind. The experiments provided evidence on the incorporation of the implanted deuterium and inherent formation of D{sub 2}-water (D{sub 2}O) as well as D{sub 2}-carbonic acid (D{sub 2}CO{sub 3}). In the molecular oxygen ices, the temporal profiles inferred that D{sub 2}-water formation followed successive deuterium atom addition to atomic oxygen via a D-hydroxyl radical intermediate in the matrix. In the carbon dioxide ices, D{sub 2}-carbonic acid was likely formed via successive deuterium atom reaction with cyclic carbon trioxide. These chemical processes have specific relevance to water formation on outer solar system bodies, such as the icy moons of Jupiter and Saturn, as well as possible implications for the formation of water on the lunar surface.

  4. A neutron diffraction study of the d{sup 0} and d{sup 10} lithium garnets Li{sub 3}Nd{sub 3}W{sub 2}O{sub 12} and Li{sub 5}La{sub 3}Sb{sub 2}O{sub 12}

    SciTech Connect

    Cussen, Edmund J. E-mail: Edmund.Cussen@Strath.ac.uk; Yip, Thomas W.S.

    2007-06-15

    The garnets Li{sub 3}Nd{sub 3}W{sub 2}O{sub 12} and Li{sub 5}La{sub 3}Sb{sub 2}O{sub 12} have been prepared by heating the component oxides and hydroxides in air at temperatures up to 950deg. C. Neutron powder diffraction has been used to examine the lithium distribution in these phases. Both compounds crystallise in the space group Ia3-bard with lattice parameters a=12.46869(9)A (Li{sub 3}Nd{sub 3}W{sub 2}O{sub 12}) and a=12.8518(3)A (Li{sub 5}La{sub 3}Sb{sub 2}O{sub 12}). Li{sub 3}Nd{sub 3}W{sub 2}O{sub 12} contains lithium on a filled, tetrahedrally coordinated 24d site that is occupied in the conventional garnet structure. Li{sub 5}La{sub 3}Sb{sub 2}O{sub 12} contains partial occupation of lithium over two crystallographic sites. The conventional tetrahedrally coordinated 24d site is 79.3(8)% occupied. The remaining lithium is found in oxide octahedra which are linked via a shared face to the tetrahedron. This lithium shows positional disorder and is split over two positions within the octahedron and occupies 43.6(4)% of the octahedra. Comparison of these compounds with related d{sup 0} and d{sup 10} phases shows that replacement of a d{sup 0} cation with d{sup 10} cation of the same charge leads to an increase in the lattice parameter due to polarisation effects.

  5. Origin of room temperature d{sup 0} ferromagnetism and characteristic photoluminescence in pristine SnO{sub 2} nanowires: A correlation

    SciTech Connect

    Khan, Gobinda Gopal; Ghosh, S.; Mandal, Kalyan

    2012-02-15

    Arrays of SnO{sub 2} nanowires are fabricated by employing a wet chemical template assisted sol-gel route using ordered nanoporous anodic aluminium oxide as the host. The origin of room temperature d{sup 0} ferromagnetism in pristine polycrystalline SnO{sub 2} nanowires is investigated by correlating photoluminescence and electron paramagnetic resonance (EPR) studies. It has been found that the naturally grown structural defects of oxygen vacancies namely singly ionised oxygen vacancy (V{sub O}{sup {center_dot}}) clusters induce the characteristic photoluminescence and contribute in ferromagnetism of pristine SnO{sub 2} nanowires at room temperature. The presence of the V{sub O}{sup {center_dot}} structural defects in the pure SnO{sub 2} nanowires is also assured by the EPR spectroscopy. Present study will help understand the puzzle about the unexpected magnetic phenomenon in these undoped wide band gap oxide semiconductors. Highlights: Black-Right-Pointing-Pointer SnO{sub 2} NWs are fabricated by wet chemical AAO template assisted route. Black-Right-Pointing-Pointer SnO{sub 2} NWs exhibit d{sup 0} ferromagnetism at room temperature. Black-Right-Pointing-Pointer Origin of ferromagnetism is correlated with photoluminescence and EPR studies. Black-Right-Pointing-Pointer Oxygen vacancy clusters are attributed to boost ferromagnetism in SnO{sub 2} NWs.

  6. State-to-state dynamics of the H{sup *}(n) + HD → D{sup *}(n{sup ′}) + H{sub 2} reactive scattering

    SciTech Connect

    Yu, Shengrui; Su, Shu; Dai, Dongxu; Yuan, Kaijun E-mail: xmyang@dicp.ac.cn; Yang, Xueming E-mail: xmyang@dicp.ac.cn

    2014-01-21

    The state-to-state dynamics of the H{sup *}(n) + HD → D{sup *}(n{sup ′}) + H{sub 2} reactive scattering at the collision energy of 0.5 eV have been carried out for the first time by using H-atom Rydberg tagging time-of-flight technique. Experimental results show that the angular distribution of the total H{sub 2} products presents clearly forward-backward asymmetric, which considerably differs from that of the corresponding H{sup +} + HD → D{sup +} + H{sub 2} reaction predicted by previously theoretical calculations. Such disagreement between these two processes suggests that the Fermi independent-collider model is also not valid in describing the dynamics of isotopic variants of the H{sup *} + H{sub 2} reaction. The rotational state distribution of the H{sub 2} products demonstrates a saw-toothed distribution with odd-j{sup ′} > even-j{sup ′}. This interesting observation is strongly influenced by nuclear spin statistics.

  7. Relative brightness of the O{sup +}({sup 2} D-{sup 2} P) doublets in low-energy aurorae

    SciTech Connect

    Whiter, D. K.; Lanchester, B. S.; Gustavsson, B.; Jallo, N. I. B.; Jokiaho, O.; Dahlgren, H.; Ivchenko, N.

    2014-12-10

    The ratio of the emission line doublets from O{sup +} at 732.0 nm (I {sub 732}) and 733.0 nm (I {sub 733}) has been measured in auroral conditions of low-energy electron precipitation from Svalbard (78.°20 north, 15.°83 east). Accurate determination of R = I {sub 732}/I {sub 733} provides a powerful method for separating the density of the O{sup +} {sup 2} P{sub 1} {sub /2,3} {sub /2}{sup o} levels in modeling of the emissions from the doublets. A total of 383 spectra were included from the winter of 2003-2004. The value obtained is R = I {sub 732}/I {sub 733} = 1.38 ± 0.02, which is higher than theoretical values for thermal equilibrium in fully ionized plasma, but is lower than reported measurements by other authors in similar auroral conditions. The continuity equations for the densities of the two levels are solved for different conditions, in order to estimate the possible variations of R. The results suggest that the production of ions in the two levels from O ({sup 3} P {sub 1}) and O ({sup 3} P {sub 2}) does not follow the statistical weights, unlike astrophysical calculations for plasmas in nebulae. The physics of auroral impact ionization may account for this difference, and therefore for the raised value of R. In addition, the auroral solution of the densities of the ions, and thus of the value of R, is sensitive to the temperature of the neutral atmosphere. Although the present work is a statistical study, it shows that it is necessary to determine whether there are significant variations in the ratio resulting from non-equilibrium conditions, from auroral energy deposition, large electric fields, and changes in temperature and composition.

  8. Two-photon excitation of the 4[ital f][sup 1][r arrow]5[ital d][sup 1] transitions of Ce[sup 3+] in LuPO[sub 4] and YPO[sub 4

    SciTech Connect

    Sytsma, J.; Piehler, D.; Edelstein, N.M. ); Boatner, L.A.; Abraham, M.M. )

    1993-06-01

    Two-photon excitation (TPE) spectra of the 4[ital f][sup 1][r arrow]5[ital d][sup 1] transitions of Ce[sup 3+] in LuPO[sub 4] and YPO[sub 4] have been investigated. For Ce[sup 3+] in LuPO[sub 4], transitions to four out of the five 5[ital d][sup 1] levels are observed as zero-phonon lines. The symmetry properties of the levels were obtained from the polarization dependence of the TPE signals. Measurements on Ce[sup 3+] in YPO[sub 4] support the given assignments. Although a crystal-field fit yields a satisfactory rms energy deviation, an unrealistic value of the spin-orbit coupling parameter, [zeta][sub 5[ital d

  9. Experimental studies on the formation of D{sub 2}O and D{sub 2}O{sub 2} by implantation of energetic D{sup +} ions into oxygen ices

    SciTech Connect

    Bennett, Chris J.; Ennis, Courtney P.; Kaiser, Ralf I.

    2014-02-20

    The formation of water (H{sub 2}O) in the interstellar medium is intrinsically linked to grain-surface chemistry; thought to involve reactions between atomic (or molecular) hydrogen with atomic oxygen (O), molecular oxygen (O{sub 2}), and ozone (O{sub 3}). Laboratory precedent suggests that H{sub 2}O is produced efficiently when O{sub 2} ices are exposed to H atoms (∼100 K). This leads to the sequential generation of the hydroxyperoxyl radical (HO{sub 2}), then hydrogen peroxide (H{sub 2}O{sub 2}), and finally H{sub 2}O and a hydroxyl radical (OH); despite a barrier of ∼2300 K for the last step. Recent detection of the four involved species toward ρ Oph A supports this general scenario; however, the precise formation mechanism remains undetermined. Here, solid O{sub 2} ice held at 12 K is exposed to a monoenergetic beam of 5 keV D{sup +} ions. Products formed during the irradiation period are monitored through FTIR spectroscopy. O{sub 3} is observed through seven archetypal absorptions. Three additional bands found at 2583, 2707, and 1195 cm {sup –1} correspond to matrix isolated DO{sub 2} (ν{sub 1}) and D{sub 2}O{sub 2} (ν{sub 1}, ν{sub 5}), and D{sub 2}O (ν{sub 2}), respectively. During subsequent warming, the O{sub 2} ice sublimates, revealing a broad band at 2472 cm{sup –1} characteristic of amorphous D{sub 2}O (ν{sub 1}, ν{sub 3}). Sublimating D{sub 2}, D{sub 2}O, D{sub 2}O{sub 2}, and O{sub 3} products were confirmed through their subsequent detection via quadrupole mass spectrometry. Reaction schemes based on both thermally accessible and suprathermally induced chemistries were developed to fit the observed temporal profiles are used to elucidate possible reaction pathways for the formation of D{sub 2}-water. Several alternative schemes to the hydrogenation pathway (O{sub 2}→HO{sub 2}→H{sub 2}O{sub 2}→H{sub 2}O) were identified; their astrophysical implications are briefly discussed.

  10. Pathway of D{sup +} in sequential double ionization of D{sub 2} in an intense laser pulse

    SciTech Connect

    Vafaee, Mohsen; Shokri, Babak

    2010-05-15

    Details of the pathway for the dissociative ionization process of the ground electronic state of aligned D{sub 2}{sup +} produced from the first ionization of D{sub 2} in a short ({approx}100 fs) and intense (4.0x10{sup 14} W cm{sup -2}) 480 nm laser pulse are analyzed and visualized. The initial vibrational state of D{sub 2}{sup +} comes from the vertical transformation of the ground state of D{sub 2}. The initial wave packet in the ground electronic state of D{sub 2}{sup +} is outgoing through a dissociation-ionization channel accompanied by a strong coupling between the 1s{sigma}{sub g} and 2p{sigma}{sub u} electronic states. We show explicitly that the transition from the coupling states 1s{sigma}{sub g} and 2p{sigma}{sub u} to the ionization state is not a direct transition, but takes place through other intermediate states having some dissociative energy that results in a relatively wide internuclear distribution of the ionization state.

  11. Preliminary Measurement of D{sup *}/D Production and D{sup *} Spin Alignment at the Z{sup 0} Resonance

    SciTech Connect

    Akagi, T.; SLD Collaboration

    1996-08-01

    USING HADRONIC Z{sup 0} DECAYS RECORDED BY THE SLD EXPERIMENT AT SLAC, WE HAVE MEASURED THE VECTOR/(VECTOR+PSEUDOSCALAR) PRODUCTION RATIO, V/(V + P), FOR THE PROMPT CHARMED MESONS D{sup *+} AND D{sup +}. USING THE CHANNELS D{sup *+} {yields} D{sup 0}{pi}{sup +}{sub S}, D{sup 0} {yields} K{sup -}{pi}{sup +}, AND D{sup 0} {yields} K{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup +}, AS WELL AS D{sup +} {yields} K{sup -}{pi}{sup +}{pi}{sup -}, WE FIND V/(V + P) = 0.61 +/- 0.09(STAT.) +/- 0.03(BR), WHICH DISFAVORS THE EXPECTATION OF 0.75 FROM NAIVE SPIN COUNTING. WE HAVE ALSO MEASURED THE DEGREE OF D{sup *+} SPIN ALIGNMENT ALONG THE FLIGHT DIRECTION AND FIND IT TO BE CONSISTENT WITH ZERO FOR D{sup *+} FRACTIONAL MOMENTA x = E{sub D*}/E{sub BEAM} {gt} 0.2. We compare these results with QCD model predictions.

  12. Fourier transform spectroscopy of the Swan (d(sup 3)pi(sub g) - a(sup 3)pi(sub u)) system of the jet-cooled C2 molecule

    NASA Technical Reports Server (NTRS)

    Prasad, C. V. V.; Bernath, P. F.

    1994-01-01

    The Swan (d(sup 3)pi(sub g) - a(sup 3)pi(sub u)) system of the C2 molecule was produced in a jet-cooled corona excited supersonic expansion of helium using diazoacetonitrile as a percursor molecule. This spectrum was recorded using the McMath Fourier transform spectrometer of the National Solar Observatory at Kitt Peak. A total of nine bands with v prime = 0 to 3 and v prime prime = 0 to 4 in the range 16,570-22,760/cm were observed and rotationally analyzed. The C2 molecules in this source had a rotational temperature of only 90 K so that only the low-J lines were present in the spectrum. In some sense the low temperatures in the jet source simulate conditions in the interstellar medium. The Swan system of C2 was also produced in a composite wall hollow cathode made Al4C3/Cu, and the rotational structure of the 1-0, 2-1, 3-2, 0-0, and 1-1 bands were analyzed. The data obtained from both these spectra were fitted together along with some recently published line positions. The rotational constants, lambda doubling parameters and the vibrational constants were estimated from this global fit. Our work on jet-cooled C2 follows similar work on the violet and red systems of CN. A summary of this CN work is also presented. also presented.

  13. Three luminescent d{sup 10} metal coordination polymers assembled from a semirigid V-shaped ligand with high selective detecting of Cu{sup 2+} ion and nitrobenzene

    SciTech Connect

    Wu, Wei-Ping; Liu, Ping; Liang, Yu-Tong; Cui, Lin; Xi, Zheng-Ping; Wang, Yao-Yu

    2015-08-15

    Three 2D luminescent coordination polymers with helical frameworks, [ZnL{sub 2}]{sub n} (1) and ([ML{sub 2}]·(H{sub 2}O)){sub n} (M=Zn (2), Cd (3)) (HL=4-((2-methyl-1 H-imidazol-1-yl)methyl)benzoic acid), have been assembled under hydro(solvo)thermal conditions. Complex 1 is in chiral space group and displays a rare 2D→2D 2-fold parallel interpenetrated layer network with two types of chiral double helixes. Interestingly, the single crystal structure analyses indicate the coexistence of enantiomers la and 1b in one pot, while the bulk crystallization of 1 are racemic mixtures based on the CD measurement. 2 and 3 are isostructural, in the structure, there are two kinds of 2D chiral helical-layers which stack in an -ABAB- sequence leading to the overall structure are mesomer and achiral. All compounds display intense luminescence in solid state at room temperature with high chemical and thermal stability. More importantly, 1 has been successfully applied in the detection of Cu{sup 2+} ions in aqueous media and nitrobenzene and the probable detecting mechanism was also discussed. - Graphical abstract: Three luminescent d{sup 10} metal coordination polymers with helical-layer based on 4-((2-methyl-1H-imidazol-1-yl)methyl)benzoic acid have been obtained. Compound 1 shows high selective detecting for Cu{sup 2+} ion in aqueous and nitrobenzene. - Highlights: • Three coordination polymers with chiral helical-layer have been obtained. • 1 Can luminescent detect Cu{sup 2+} ion in aqueous media and nitrobenzene. • Racemic mixture or mesomer compounds can be obtained by controlling the reaction conditions.

  14. Measurement of the B{yields}D{sup (*)}D{sup (*)}K branching fractions

    SciTech Connect

    Amo Sanchez, P. del; Lees, J. P.; Poireau, V.; Prencipe, E.; Tisserand, V.; Martinelli, M.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Battaglia, M.; Brown, D. N.; Hooberman, B.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I. L.

    2011-02-01

    We present a measurement of the branching fractions of the 22 decay channels of the B{sup 0} and B{sup +} mesons to D{sup (*)}D{sup (*)}K, where the D{sup (*)} and D{sup (*)} mesons are fully reconstructed. Summing the 10 neutral modes and the 12 charged modes, the branching fractions are found to be B(B{sup 0}{yields}D{sup (*)}D{sup (*)}K)=(3.68{+-}0.10{+-}0.24)% and B(B{sup +}{yields}D{sup (*)}D{sup (*)}K)=(4.05{+-}0.11{+-}0.28)%, where the first uncertainties are statistical and the second systematic. The results are based on 429 fb{sup -1} of data containing 471x10{sup 6}BB pairs collected at the {Upsilon}(4S) resonance with the BABAR detector at the SLAC National Accelerator Laboratory.

  15. Radiative decay of [ital D][sub 2][sup *](2460) and [ital D][sub 1](2420)

    SciTech Connect

    Fayyazuddin; Mobarek, O.H. )

    1994-08-01

    The [ital E]1 transition decay widths for the decays [ital D][sub 2][sup *][r arrow][ital D][sup *]+[gamma], [ital D][sub 1][r arrow][ital D]+[gamma], and [ital D][sub 1][r arrow][ital D][sup *]+[gamma] are calculated in the nonrelativistic quark model with recoil and relativistic corrections.

  16. Spectral temperatures of {Delta}{sup 0}(1232) resonances produced in p{sup 12}C and d{sup 12}C collisions at 4.2 GeV/c per nucleon

    SciTech Connect

    Khan, Imran; Olimov, Kh. K.

    2013-07-15

    The reconstructed experimental transverse momentum (p{sub t}) distributions of {Delta}{sup 0}(1232) resonances produced in p{sup 12}C and d{sup 12}C collisions at 4.2 A GeV/c and the corresponding spectra calculated using Modified FRITIOF model were analyzed in the framework of Hagedorn Thermodynamic Model. The spectral temperatures of {Delta}{sup 0}(1232) resonances were extracted from fitting their p{sub t} spectra with one-temperature Hagedorn function. The extracted spectral temperatures of {Delta}{sup 0}(1232) were compared with the corresponding temperatures of {pi}{sup -} mesons in p{sup 12}C and d{sup 12}C collisions at 4.2 A GeV/c obtained similarly from fitting the p{sub t} spectra of {pi}{sup -} by one-temperature Hagedorn function. The spectral temperatures of {Delta}{sup 0}(1232) resonances agreed within uncertainties with the corresponding temperatures of {pi}{sup -} mesons produced in p{sup 12}C and d{sup 12}C collisions at 4.2 A GeV/c.

  17. Nonfactorizable contribution to B{sub d}{sup 0{yields}{pi}0}D{sup 0}

    SciTech Connect

    Leganger, Lars E.; Eeg, Jan O.

    2010-10-01

    The decay modes of the type B{yields}{pi}D are dynamically different. For the case B{sub d}{sup 0{yields}{pi}-}D{sup +} there is a substantial factorized contribution which dominates. In contrast, the decay mode B{sub d}{sup 0{yields}{pi}0}D{sup 0} has a small factorized contribution, being proportional to a very small Wilson coefficient combination. In this paper we calculate the relevant Wilson coefficients at one loop level in the heavy quark limits, both for the b quark and the c quark. We also emphasize that for the decay mode B{sub d}{sup 0{yields}{pi}0}D{sup 0} there is a sizeable nonfactorizable contribution due to long-distance interactions, which dominate the amplitude. We estimate the branching ratio for this decay mode within our framework, which uses the heavy quark limits, both for the b and the c quarks. In addition, we treat energetic light (u,d,s) quarks within a variant of large energy effective theory and combine this with a new extension of chiral quark models in order to estimate the effect of soft-gluon emission. For reasonable values of the model-dependent parameters of our model, we can account for at least 3/4 of the amplitude needed to explain the experimental branching ratio {approx_equal}2.6x10{sup -4}.

  18. Synthesis and characterization of Cp{sub 2}Zr(CH(Me)(6-ethylpyrid-2-yl)) (CO){sup +}, a d{sup 0} metal alkyl carbonyl complex. Coordination chemistry of the four-membered azazirconacycle Cp{sub 2}Zr({eta}{sup 2}-C,N-CH(Me)(6-ethylpyrid-2-yl)){sup +}

    SciTech Connect

    Guram, A.S.; Swenson, D.C.; Jordan, R.F.

    1992-11-04

    The cationic complex Cp{sub 2}Zr(CH{sub 3})(THF){sup +} (1, as the BPh{sub 4}{sup {minus}} salt) reacts with 2,6-diethylpyridine to afford the chelated secondary zirconocene-alkyl complex Cp{sub 2}Zr({eta}{sup 2}-C,N-CH(Me)(6-ethylpyrid-2-yl)){sup +} (2). Treatment of complex 2 with CO, CH{sub 3}CN, {sup t}BuCN, and (PhCH{sub 2})(Et){sub 3}N{sup +}Cl{sup {minus}} affords Cp{sub 2}Zr(CH(Me)(6-ethylpyrid-2-yl))(CO){sup +} (3), Cp{sub 2}Zr(CH(Me)(6-ethylpyrid-2-yl))(CH{sub 3}CN){sup +} (4), Cp{sub 2}Zr(CH(Me)(6-ethylpyrid-2-yl))({sup 5}BuCN){sup +} (5), and Cp{sub 2}Zr(CH(Me)(6-ethylpyrid-2-yl))(Cl) (6), respectively. The thermally sensitive d{sup 0} carbonyl complex 3 is a rare example of a d{sup 0} M(alkyl)-CO adduct and is unambiguously characterized in solution by low-temperature NMR and IR spectroscopy, {sup 13}C-labeling and hydrolysis experiments, and decomposition studies. IR and NMR data establish that 3 contains a terminal CO ligand. An X-ray structure analysis of 6 established that the CH(Me)(6-ethylpyrid-2-yl) ligand adopts a chelated structure; the similarity of the spectroscopic data for 3-6 implies that 3-5 have similar chelated structures. At room temperature, 3 in CD{sub 2}Cl{sub 2} rapidly decomposes to afford a complex mixture of products. {sup 1}H NMR monitoring of the decomposition of 3 reveals formation of a transient cationic zirconocene-acyl intermediate 9, which undergoes 1,2-H shift to afford a mixture of isomeric/oligomeric zirconocene-enolates. Treatment of this mixture with (PhCH{sub 2})(Et){sub 3}N{sup +}Cl{sup {minus}} affords Cp{sub 2}Zr(OCH=C(Me)(6-ethylpyrid-2-yl)) Cl (10) as a mixture of E/Z isomers, establishing the presence of zirconocene-enolate species. Hydrolysis of the decomposition products of 3 affords a mixture of thermally sensitive tautomers, enol 11/aldehyde 11{prime}, which are characterized by NMR, FTIR, and mass spectroscopy. 39 refs., 6 figs., 3 tabs.

  19. Implantation of energetic D{sup +} ions into carbon dioxide ices and implications for our solar system: formation of D{sub 2}O and D{sub 2}CO{sub 3}

    SciTech Connect

    Bennett, Chris J.; Ennis, Courtney P.; Kaiser, Ralf I.

    2014-10-10

    Carbon dioxide (CO{sub 2}) ices were irradiated with energetic D{sup +} ions to simulate the exposure of oxygen-bearing solar system ices to energetic protons from the solar wind and magnetospheric sources. The formation of species was observed online and in situ by exploiting FTIR spectroscopy. Molecular products include ozone (O{sub 3}), carbon oxides (CO{sub 3}(C {sub 2v}, D {sub 3h}), CO{sub 4}, CO{sub 5}, CO{sub 6}), D2-water (D{sub 2}O), and D2-carbonic acid (D{sub 2}CO{sub 3}). Species released into the gas phase were sampled via a quadrupole mass spectrometer, and possible minor contributions from D2-formaldehyde (D{sub 2}CO), D4-methanol (CD{sub 3}OD), and D2-formic acid (DCOOD) were additionally identified. The feasibility of several reaction networks was investigated by determining their ability to fit the observed temporal column densities of 10 key species that were quantified during the irradiation period. Directly relevant to the CO{sub 2}-bearing ices of comets, icy satellites in the outer solar system, and the ice caps on Mars, this work illustrates for the first time that D2-water is formed as a product of the exposure of CO{sub 2} ices to D{sup +} ions. These findings provide strong support for water formation from oxygen-bearing materials via non-thermal hydrogen atoms, and predict reaction pathways that are likely to be unfolding on the surfaces of asteroids and the Moon.

  20. Interference effect in the dipole and nondipole anisotropy parameters of the Kr 4p photoelectrons in the vicinity of the Kr (3d){sup -1{yields}}np resonant excitations

    SciTech Connect

    Ricz, S.; Ricsoka, T.; Holste, K.; Borovik, A. Jr.; Bernhardt, D.; Schippers, S.; Mueller, A.; Koever, A.; Varga, D.

    2010-04-15

    The angular distribution of the Kr 4p photoelectrons was investigated in the photon energy range of the (3d){sup -1{yields}}np resonant excitations. The experimental dipole ({beta}) and nondipole ({gamma} and {delta}) anisotropy parameters were determined for the spin-orbit components of the Kr 4p shell. A simple theoretical model was developed for the description of the photoionization and excitation processes. An interference effect was observed between the direct photoionization and the resonant excitation participator Auger decay processes in the photon energy dependence of the experimental anisotropy parameters.

  1. Inclusive {chi}{sub bJ}(nP) decays to D{sup 0}X

    SciTech Connect

    Briere, R. A.; Ferguson, T.; Tatishvili, G.; Vogel, H.; Watkins, M. E.; Rosner, J. L.; Alexander, J. P.; Cassel, D. G.; Duboscq, J. E.; Ehrlich, R.; Fields, L.; Galik, R. S.; Gibbons, L.; Gray, R.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; Hertz, D.; Kandaswamy, J.; Kreinick, D. L.

    2008-11-01

    Using {upsilon}(2S) and {upsilon}(3S) data collected with the CLEO III detector we have searched for decays of {chi}{sub bJ} to final states with open charm. We fully reconstruct D{sup 0} mesons with p{sub D{sup 0}}>2.5 GeV/c in three decay modes (K{sup -}{pi}{sup +}, K{sup -}{pi}{sup +}{pi}{sup 0}, and K{sup -}{pi}{sup -}{pi}{sup +}{pi}{sup +}) in coincidence with radiative transition photons that tag the production of one of the {chi}{sub bJ}(nP) states. Significant signals are obtained for the two J=1 states. Recent nonrelativistic QCD (NRQCD) calculations of {chi}{sub bJ}(nP){yields}ccX depend on one nonperturbative parameter per {chi}{sub bJ} triplet. The extrapolation from the observed D{sup 0}X rate over a limited momentum range to a full ccX rate also depends on these same parameters. Using our data to fit for these parameters, we extract results which agree well with NRQCD predictions, confirming the expectation that charm production is largest for the J=1 states. In particular, for J=1, our results are consistent with ccg accounting for about one-quarter of all hadronic decays.

  2. Energy spectrum of D{sup 0} centre in a spherical Gaussian quantum dot

    SciTech Connect

    Boda, Aalu Chatterjee, Ashok

    2015-05-15

    The properties of a neutral hydrogenic donor (D{sup 0}) centres have been studied for a GaAs semiconductor quantum dot with the Gaussian confinement potential. The energy levels of the ground state (n = 1) and the excited states of both the first excited (n = 2) and second excited (n = 3) configurations have been calculated by variational method. It has been shown that the excited states of the (D{sup 0}) centre in quantum dot are bound for sufficiently strong confinement potential. The conditions of binding for the ground state as well as excited states have been determined as functions of the potential strength and quantum dot radius. The ground state electron energy is compared with those available in the literature.

  3. Comparison of characteristics of {Delta}{sup 0}(1232) produced in p{sup 12}C and d{sup 12}C collisions at 4.2 A GeV/c

    SciTech Connect

    Olimov, Kh. K. Haseeb, Mahnaz Q. Khan, Imran

    2012-04-15

    Reconstructed momentum, transverse momentum, kinetic energy, rapidity, and emission angle distributions along with their mean values were compared for {Delta}{sup 0}(1232) resonances produced in p{sup 12}C and d{sup 12}C collisions at 4.2 A GeV/c. Mean momentum, transverse momentum, and rapidity of protons and negative pions coming from {Delta}{sup 0}(1232) decay were extracted and compared with the corresponding mean values for protons and {pi}{sup -} mesons in experiment and the relevant model calculations.

  4. Synthesis and characterization of d{sup 10} metal complexes with mixed 1,3-di(1H-imidazol-4-yl)benzene and multicarboxylate ligands

    SciTech Connect

    Chen, Zhi-Hao; Zhao, Yue; Chen, Shui-Sheng; Wang, Peng; Sun, Wei-Yin

    2013-06-15

    Seven new coordination polymers [Zn(H{sub 2}L)(mbdc)] (1), [Zn(H{sub 3}L)(btc)] (2), [Zn(H{sub 2}L)(Hbtc)] (3), [Zn(H{sub 2}L)(Hbtc)]·H{sub 2}O (4), [Zn{sub 2}(H{sub 2}L)(btc)(μ{sub 2}-OH)] (5), [Cd(H{sub 2}L)(mbdc)] (6) and [Cd{sub 3}(H{sub 2}L){sub 2}(btc){sub 2}(H{sub 2}O)]·5H{sub 2}O (7) were synthesized by reactions of the corresponding metal salt with rigid ligand 1,3-di(1H-imidazol-4-yl)benzene (H{sub 2}L) and different carboxylic acids of 1,3-benzenedicarboxylic acid (H{sub 2}mbdc) and benzene-1,3,5-tricarboxylic acid (H{sub 3}btc), respectively. The results of X-ray crystallographic analysis indicate that complex 1 is 1D chain while 2 is a (3,3)-connected 2D network with Point (Schläfli) symbol of (4,8{sup 2}). Complexes 3 and 6 are 2D networks, 4 is a 3-fold interpenetrating 3D framework with Point (Schläfli) symbol of (6{sup 5},8) and 5 is a (3,8)-connected 2D network with Point (Schläfli) symbol of (3,4{sup 2}){sub 2}(3{sup 4},4{sup 6},5{sup 6},6{sup 8},7{sup 3},8), while 7 is a (3,10)-connected 3D net with Schläfli symbol of (3,4,5){sub 2}(3{sup 4},4{sup 8},5{sup 18},6{sup 12},7{sup 2},8). The thermal stability and photoluminescence of the complexes were investigated. Furthermore, DFT calculations were performed for 2–4 to discuss the temperature controlled self-assembly of the complexes. - Graphical abstract: Seven new coordination polymers with multicarboxylate and rigid ditopic 4-imidazole containing ligands have been obtained and found to show different structures and topologies. - Highlights: • Metal complexes with diverse structures of 1D chain, 2D network and 3D framework. • Mixed ligands of 1,3-di(1H-imidazol-4-yl)benzene and multicarboxylate. • Photoluminescence property.

  5. Use of d-{sup 3}He proton spectroscopy as a diagnostic of shell {rho}r in capsule implosion experiments with {approx}0.2 NIF scale high temperature Hohlraums at Omega

    SciTech Connect

    Delamater, N. D.; Wilson, D. C.; Kyrala, G. A.; Seifter, A.; Hoffman, N. M.; Dodd, E.; Singleton, R.; Glebov, V.; Stoeckl, C.; Li, C. K.; Petrasso, R.; Frenje, J.

    2008-10-15

    We present the calculations and preliminary results from experiments on the Omega laser facility using d-{sup 3}He filled plastic capsule implosions in gold Hohlraums. These experiments aim to develop a technique to measure shell {rho}r and capsule unablated mass with proton spectroscopy and will be applied to future National Ignition Facility (NIF) experiments with ignition scale capsules. The Omega Hohlraums are 1900 {mu}m lengthx1200 {mu}m diameter and have a 70% laser entrance hole. This is approximately a 0.2 NIF scale ignition Hohlraum and reaches temperatures of 265-275 eV similar to those during the peak of the NIF drive. These capsules can be used as a diagnostic of shell {rho}r, since the d-{sup 3}He gas fill produces 14.7 MeV protons in the implosion, which escape through the shell and produce a proton spectrum that depends on the integrated {rho}r of the remaining shell mass. The neutron yield, proton yield, and spectra change with capsule shell thickness as the unablated mass or remaining capsule {rho}r changes. Proton stopping models are used to infer shell unablated mass and shell {rho}r from the proton spectra measured with different filter thicknesses. The experiment is well modeled with respect to Hohlraum energetics, neutron yields, and x-ray imploded core image size, but there are discrepancies between the observed and simulated proton spectra.

  6. Cold and ultracold dynamics of the barrierless D{sup +} + H{sub 2} reaction: Quantum reactive calculations for ∼R{sup −4} long range interaction potentials

    SciTech Connect

    Lara, Manuel; Jambrina, P. G.; Aoiz, F. J.; Launay, J.-M.

    2015-11-28

    Quantum reactive and elastic cross sections and rate coefficients have been calculated for D{sup +} + H{sub 2} (v = 0, j = 0) collisions in the energy range from 10{sup −8} K (deep ultracold regime), where only one partial wave is open, to 150 K (Langevin regime) where many of them contribute. In systems involving ions, the ∼R{sup −4} behavior extends the interaction up to extremely long distances, requiring a special treatment. To this purpose, we have used a modified version of the hyperspherical quantum reactive scattering method, which allows the propagations up to distances of 10{sup 5} a{sub 0} needed to converge the elastic cross sections. Interpolation procedures are also proposed which may reduce the cost of exact dynamical calculations at such low energies. Calculations have been carried out on the PES by Velilla et al. [J. Chem. Phys. 129, 084307 (2008)] which accurately reproduces the long range interactions. Results on its prequel, the PES by Aguado et al. [J. Chem. Phys. 112, 1240 (2000)], are also shown in order to emphasize the significance of the inclusion of the long range interactions. The calculated reaction rate coefficient changes less than one order of magnitude in a collision energy range of ten orders of magnitude, and it is found in very good agreement with the available experimental data in the region where they exist (10-100 K). State-to-state reaction probabilities are also provided which show that for each partial wave, the distribution of HD final states remains essentially constant below 1 K.

  7. Determination of the Strong Phase in D{sup 0}{yields}K{sup +}{pi}{sup -} Using Quantum-Correlated Measurements

    SciTech Connect

    Rosner, J. L.; Alexander, J. P.; Cassel, D. G.; Duboscq, J. E.; Ehrlich, R.; Fields, L.; Gibbons, L.; Gray, R.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; Hertz, D.; Jones, C. D.; Kandaswamy, J.; Kreinick, D. L.; Kuznetsov, V. E.; Mahlke-Krueger, H.; Mohapatra, D.; Onyisi, P. U. E.; Patterson, J. R.

    2008-06-06

    We exploit the quantum coherence between pair-produced D{sup 0} and D{sup 0} in {psi}(3770) decays to study charm mixing, which is characterized by the parameters x and y, and to make a first determination of the relative strong phase {delta} between D{sup 0}{yields}K{sup +}{pi}{sup -} and D{sup 0}{yields}K{sup +}{pi}{sup -}. Using 281 pb{sup -1} of e{sup +}e{sup -} collision data collected with the CLEO-c detector at E{sub cm}=3.77 GeV, as well as branching fraction input and time-integrated measurements of R{sub M}{identical_to}(x{sup 2}+y{sup 2})/2 and R{sub WS}{identical_to}{gamma}(D{sup 0}{yields}K{sup +}{pi}{sup -})/{gamma}(D{sup 0}{yields}K{sup +}{pi}{sup -}) from other experiments, we find cos{delta}=1.03{sub -0.17}{sup +0.31}{+-}0.06, where the uncertainties are statistical and systematic, respectively. By further including other mixing parameter measurements, we obtain an alternate measurement of cos{delta}=1.10{+-}0.35{+-}0.07, as well as xsin{delta}=(4.4{sub -1.8}{sup +2.7}{+-}2.9)x10{sup -3} and {delta}=(22{sub -12-11}{sup +11+9}) deg.

  8. D-(/sup 3/H)aspartate retrograde labelling of callosal and association neurons of somatosensory areas I and II of cats

    SciTech Connect

    Barbaresi, P.; Fabri, M.; Conti, F.; Manzoni, T.

    1987-09-08

    Experiments were carried out on cats to ascertain whether corticocortical neurons of somatosensory areas I (SI) and II (SII) could be labelled by retrograde axonal transport of D-(/sup 3/H)aspartate (D-(/sup 3/H)Asp). This tritiated enantiomer of the amino acid aspartate is (1) taken up selectively by axon terminals of neurons releasing aspartate and/or glutamate as excitatory neurotransmitter, (2) retrogradely transported and accumulated in perikarya, (3) not metabolized, and (4) visualized by autoradiography. A solution of D-(/sup 3/H)Asp was injected in eight cats in the trunk and forelimb zones of SI (two cats) or in the forelimb zone of SII (six cats). In order to compare the labelling patterns obtained with D-(/sup 3/H)Asp with those resulting after injection of a nonselective neuronal tracer, horseradish peroxidase (HRP) was delivered mixed with the radioactive tracer in seven of the eight cats. Furthermore, six additional animals received HRP injections in SI (three cats; trunk and forelimb zones) or SII (three cats; forelimb zone). D-(/sup 3/H)Asp retrograde labelling of perikarya was absent from the ipsilateral thalamus of all cats injected with the radioactive tracer but a dense terminal plexus of anterogradely labelled corticothalamic fibers from SI and SII was observed, overlapping the distribution area of thalamocortical neurons retrogradely labelled with HRP from the same areas. D-(/sup 3/H)Asp-labelled neurones were present in ipsilateral SII (SII-SI association neurones) in cats injected in SI. In these animals a bundle of radioactive fibres was observed in the rostral portion of the corpus callosum entering the contralateral hemisphere. There, neurones retrogradely labelled with silver grains were present in SI (SI-SI callosal neurons).

  9. A study of D{sup 0} production from 500 GeV pi{sup -}--nucleon interactions

    SciTech Connect

    K.M. Stenson

    1999-01-26

    Fermilab experiment E791 took data during six months in 1991 using a 500 GeV {pi}{sup -} beam on platinum and diamond targets for the purpose of studying the production and decay of particles containing a charm quark. In this dissertation, results are presented on the production of the D{sup 0} and {anti D}{sup 0} mesons using fully reconstructed D{sup 0}{yields}K{pi} and D{sup 0}{yields}K{pi}{pi}{pi} decays. Specifically, the total forward production cross section is measured as well as differential cross sections as a function of the scaled longitudinal momentum, Feynman-x (x{sub F}), and the transverse momentum squared (p{sub T}{sup 2}). The results are compared to theoretical predictions from a next-to-leading order (NLO) calculation and from a leading order Monte Carlo event generator, PYTHIA/JETSET, which uses parton showers to account for higher-order terms. The comparison is made to both the c quark predictions and the predictions for D mesons using the Peterson fragmentation scheme for the NLO calculation and the Lund string fragmentation for the PYTHIA/JETSET prediction. The data are also compared to previous measurements by other experiments which used a {pi}{sup -} beam. Assuming an A{sup 1} dependence, the total forward cross section for the sum of D{sup 0} and {anti D}{sup 0} production is measured to be {sigma}(D{sup 0}/{anti D}{sup 0}; x{sub F}>0)=15.4{sup +1.8}{sub -2.3} {micro}barns/nucleon, in good agreement with other experiments and the NLO prediction. The differential cross sections agree best with the NLO c quark prediction and the PYTHIA/JETSET D{sup 0} meson prediction. Several functions are fit to the differential cross sections. From the fits to the x{sub F} distribution we find the x{sub F} distribution peaks at x{sub F}=0.013{+-}0.004, significantly above zero as predicted by the harder pion parton distribution function. Fitting the shape of the x{sub F} distribution to (1-x{sub F}){sup n}, while not a good fit, gives n=4.61{+-}0.19 for

  10. Looking for new physics in B{sub d}{sup 0}-B{sub d}{sup 0} mixing

    SciTech Connect

    London, David

    1999-10-04

    There are variety of methods which directly test for the presence of new physics in the b{yields}s flavor-changing neutral current (FCNC), but none which cleanly probe new physics in the b{yields}d FCNC. One possible idea is to compare the weak phase of the t-quark contribution to the b{yields}d penguin, which is -{beta} in the SM, with that of B{sub d}{sup 0}-B{sub d}{sup 0} mixing (-2{beta} in the SM). In this talk I show that, in fact, it is impossible to measure the weak phase of the t-quark penguin, or indeed any penguin contribution, without theoretical input. However, if one makes a single assumption involving the hadronic parameters, it is possible to obtain the weak phase. I discuss how one can apply such an assumption to the time-dependent decays B{sub d}{sup 0}(t){yields}K{sup 0}K{sup 0} and B{sub s}{sup 0}(t){yields}{phi}K{sub s} in order to detect new physics in the b{yields}d FCNC.

  11. Bond lengths of 4f{sup 1} and 5d{sup 1} states of Ce{sup 3+} hexahalides

    SciTech Connect

    Barandiaran, Zoila; Edelstein, Norman M.; Ordejon, Belen; Ruiperez, Fernando; Seijo, Luis . E-mail: luis.seijo@uam.es

    2005-02-15

    Ligand and solvent effects on the bond length shift experienced by complexes of lanthanide ions upon 4f->5d excitation, addressed by means of ab initio embedded cluster calculations, are presented on the clusters (CeF{sub 6}){sup 3-}, (CeCl{sub 6}){sup 3-}, and (CeBr{sub 6}){sup 3-}in solid elpasolites, in liquid acetonitrile and in vacuo. Previous predictions of bond length shortening upon 4f->5d(t{sub 2g}) excitation seem to be general and, in particular, chloride and bromide compounds in liquid solution are predicted to be good candidates for excited-state EXAFS measurements of the distortion signs. A quantitative analysis of contributions to the bond length shifts is presented, which shows the importance of ligand field effects and points out insufficiencies in the Judd-Morrison model proposed to account for 4f->5d transitions in crystals.

  12. Observation of the Inclusive D^{* -} Production in the Decay of Y(1S)

    SciTech Connect

    Aubert, B.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; Tico, J.Garra; Grauges, E.; Martinelli, M.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Battaglia, M.; Brown, D.N.; Hooberman, B.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G. /UC, Berkeley /Birmingham U. /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, San Diego /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /Frascati /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /Harvard U. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa State U. /Iowa State U. /Johns Hopkins U. /Orsay, LAL /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /INFN, Milan /Milan U. /INFN, Milan /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /Mt. Holyoke Coll. /INFN, Naples /Naples U. /INFN, Naples /INFN, Naples /Naples U. /NIKHEF, Amsterdam /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /INFN, Padua /INFN, Padua /Padua U. /Paris U., VI-VII /Pennsylvania U. /INFN, Perugia /Perugia U. /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Princeton U. /INFN, Rome /Rome U. /INFN, Rome /Rome U. /Rome U. /INFN, Rome /Rome U. /INFN, Rome /Rome U. /Rome U. /INFN, Rome /Rome U. /INFN, Rome /Rome U. /Rome U. /INFN, Rome /Rome U. /INFN, Rome /Rome U. /Rome U. /INFN, Rome /Rome U. /Rostock U. /Rutherford /DAPNIA, Saclay /SLAC /South Carolina U. /Stanford U., Phys. Dept. /SUNY, Albany /Tel Aviv U. /Tennessee U. /Texas Nuclear Corp., Austin /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U. /Victoria U. /Warwick U. /Wisconsin U., Madison

    2009-12-17

    The authors present a study of the inclusive D*{sup {+-}} production in the decay of {Upsilon}(1S) using (98.6 {+-} 0.9) x 10{sup 6} {Upsilon}(2S) mesons collected with the BABAR detector at the {Upsilon}(2S) resonance. Using the decay chain {Upsilon}(2S) {yields} {pi}{sup +}{pi}{sup -}{Upsilon}(1S), {Upsilon}(1S) {yields} D*{sup {+-}}X, where X is unobserved, they measure the branching fraction {Beta}[{Upsilon}(1S) {yields} D*{sup {+-}}X] = (2.52 {+-} 0.13(stat) {+-} 0.15(syst))% and the D*{sup {+-}} momentum distribution in the rest frame of the {Upsilon}(1S). They find evidence for an excess of D*{sup {+-}} production over the expected rate from the virtual photon annihilation process {Upsilon}(1S) {yields} {gamma}* {yields} c{bar c} {yields} D*{sup {+-}} X.

  13. Simple Explanation for the X(3872) Mass Shift Observed in the Decay X(3872){yields}D*{sup 0}D{sup 0}

    SciTech Connect

    Dunwoodie, W.; Ziegler, V.

    2008-02-15

    We propose a simple explanation for the increase of approximately 3 MeV/c{sup 2} in the mass value of the X(3872) obtained from D*{sup 0}D{sup 0} decay relative to that obtained from decay to J/{psi}{pi}{sup +}{pi}{sup -}. If the total width of the X(3872) is 2-3 MeV, the peak position in the D*{sup 0}D{sup 0} invariant mass distribution is sensitive to the final state orbital angular momentum because of the proximity of the X(3872) to D*{sup 0}D{sup 0} threshold. We show that for total width 3 MeV and one unit of orbital angular momentum, a mass shift {approx}3 MeV/c{sup 2} is obtained; experimental mass resolution should slightly increase this value. A consequence is that spin-parity 2{sup -} is favored for the X(3872)

  14. Feasibility Activities Completed for the Direct Data Distribution (D(sup )3) Experiment

    NASA Technical Reports Server (NTRS)

    Wald, Lawrence W.

    2000-01-01

    The Direct Data Distribution (D(sup 3)) project being designed at the NASA Glenn Research Center at Lewis Field will demonstrate a high-performance communications system that transmits information at up to 1.2 gigabits per second (Gbps) from an advanced technology payload carried by the space shuttles in low Earth orbit to small (0.9-m) autonomously tracking terminals on the Earth. The flight communications package features a solid-state, phased-array antenna operating in the commercial K-band frequency that electronically steers two independently controlled downlink beams toward low-cost tracking ground terminals. The array enables agile, vibration-free beam steering at reduced size and weight with increased reliability over traditional mechanically steered reflectors. The flight experiment will also demonstrate efficient digital modulation technology that allows transmission of substantially increased amounts of latency-tolerant data (up to 72 Gb of data per minute of contact time) with very high quality (10(exp -11) bit error rate). D(sup 3) enables transmission from low-Earth-orbit science spacecraft, the shuttles, or the International Space Station directly to NASA field centers and principle investigator sites, or directly into the commercial terrestrial telecommunications network for remote distribution and archive. The ground terminal features a cryocooled receiver for ultralow noise and a reduced antenna aperture as well as open-loop tracking for unattended operations. The D(sup 3) technology validation and service demonstration will help to facilitate NASA's transition from using Government-owned communications assets to using commercially provided services.

  15. Magnetic order and electronic structure of 5d>3 double perovskite Sr2ScOsO6

    SciTech Connect

    Taylor, A. E.; Morrow, R.; Singh, D. J.; Calder, S.; Lumsden, M. D.; Woodward, P. M.; Christianson, A. D.

    2015-03-01

    The magnetic susceptibility, crystal and magnetic structures, and electronic structure of double perovskite Sr2ScOsO6 are reported. Using both neutron and x-ray powder diffraction we find that the crystal structure is monoclinic P21/n from 3.5 to 300 K. Magnetization measurements indicate an antiferromagnetic transition at TN=92 K, one of the highest transition temperatures of any double perovskite hosting only one magnetic ion. Type I antiferromagnetic order is determined by neutron powder diffraction, with an Os moment of only 1.6(1) muB, close to half the spin-only value for a crystal field split 5d electron state with t2g^3 ground state. Density functional calculations show that this reduction is largely the result of strong Os-O hybridization, with spin-orbit coupling responsible for only a ~0.1 muB reduction in the moment.

  16. Preliminary measurement of prompt D{sup {+-}} and D*{sup {+-}} meson production and D*{sup {+-}} spin alignment in hadronic Z{sup 0} decays

    SciTech Connect

    Abe, K.; Abe, K.; Akagi, T.; SLD Collaboration

    1997-06-01

    The authors have measured the production rates as a function of scaled energy x of prompt charmed pseudoscalar D{sup {+-}} and vector D*{sup {+-}} mesons in hadronic Z{sup 0} decays. The prompt signal components were isolated from the background of D mesons from B hadron decays using impact parameters of reconstructed D{sup {+-}} {yields} K{sup {minus_plus}}{pi}{sup {+-}}{pi}{sup {+-}} and D*-daughter D{sup 0} {yields} K{sup {minus}}{pi}{sup +} and D{sup 0} {yields} K{sup {minus}}{pi}{sup +}{pi}{sup {minus}}{pi}{sup +} candidates. Using the combined meson production rates the authors have measured the fraction of hadronic Z{sup 0} decays into c{bar c}, R{sub c} = 0.182 {+-} 0.027 (stat.) {+-} 0.012 (syst.) (Preliminary). Comparison of the D*{sup {+-}} and D{sup {+-}} rates gives a direct probe of vector (V) vs. pseudoscalar (P) meson production for charmed quarks, and for x > 0.4 they have measured P{sub V} = V/(V + P) = 0.65 {+-} 0.09(stat.) {+-} 0.03(syst.) {+-} 0.03 (BR) (Preliminary). They have measured the degree of spin alignment of the D*{sup {+-}} mesons along their flight direction and find it to be consistent with zero. They compared the latter two results with QCD- and model-based predictions of charm-quark jet fragmentation.

  17. Measurement of D{plus-minus} and D{sup 0} production in deep Inelastic scattering using a lifetime tag at HERA.

    SciTech Connect

    Chekanov, S.; Derrick, M.; Magill, S.; Musgrave, B.; Repond, J.; Yoshida, R.; Nicholass, D.; High Energy Physics; ZEUS Collboration

    2009-10-01

    The production of D{sup {+-}}- and D{sup 0}-mesons has been measured with the ZEUS detector at HERA using an integrated luminosity of 133.6 pb{sup -1}. The measurements cover the kinematic range 5 < Q{sup 2} < 1000 GeV{sup 2}, 0.02 < y < 0.7, 1.5 < p T{sup D} < 15 GeV and |{eta}{sup D}| < 1.6. Combinatorial background to the D-meson signals is reduced by using the ZEUS microvertex detector to reconstruct displaced secondary vertices. Production cross sections are compared with the predictions of next-to-leading-order QCD, which is found to describe the data well. Measurements are extrapolated to the full kinematic phase space in order to obtain the open-charm contribution, F{sub 2}{sup c{bar c}} to the proton structure function, F{sub 2}.

  18. Meaurement of D{sup *}{sup plus_minus} production in deep inelastic e{sup plus_minus}p scattering at HERA.

    SciTech Connect

    Chekanov, S.; Derrick, M.; Krakauer, D.; Loizides, J. H.; Magill, S.; Musgrave, B.; Repond, J.; Yoshida, R.; ZEUS Collaboration; High Energy Physics

    2004-01-01

    Inclusive production of D{sup *}{sup {+-}} (2010) mesons in deep inelastic scattering has been measured with the ZEUS detector at DESY HERA using an integrated luminosity of 81.9 pb{sup -1}. The decay channel D{sup *}{sup +}{yields}D0{pi}{sup +} with D0{yields}K-{pi}{sup +} and corresponding antiparticle decay were used to identify D{sup *} mesons. Differential D{sup *} cross sections with 1.52<1000 GeV2 and 0.021.51.5 are compared to different QCD calculations incorporating different parametrizations of the parton densities in the proton. The data show sensitivity to the gluon distribution in the proton and are reasonably well described by next-to-leading-order QCD with the ZEUS NLO QCD fit used as the input parton density in the proton. The observed cross section is extrapolated to the full kinematic region in pT(D{sup *}) and {eta}(D{sup *}) in order to determine the open-charm contribution, F2c{ovr c} (x, Q2), to the proton structure function, F2. Since, at low Q2, the uncertainties of the data are comparable to those from the QCD fit, the measured differential cross sections in y and Q2 should be used in future fits to constrain the gluon density.

  19. The (d,{sup 2}He) reaction on {sup 96}Mo and the double-{beta} decay matrix elements for {sup 96}Zr

    SciTech Connect

    Dohmann, H.; Baeumer, C.; Frekers, D.; Grewe, E.-W.; Hollstein, S.; Rakers, S.; Thies, J. H.; Harakeh, M. N.; Berg, A. M. van den; Woertche, H. J.; Johansson, H.; Simon, H.; Popescu, L.; Savran, D.; Zilges, A.

    2008-10-15

    The {sup 96}Mo(d,{sup 2}He){sup 96}Nb charge-exchange reaction was investigated at an incident energy of E{sub d}=183.5 MeV. An excitation-energy resolution of 110 keV was achieved. The experiment was performed at KVI, Groningen, using the magnetic spectrometer BBS at three angular positions: 0 deg., 2.5 deg., and 6 deg. We found that below 6 MeV almost the entire Gamow-Teller (GT{sup +}) strength is concentrated in a single state at 0.69 MeV excitation energy. As {sup 96}Mo is the daughter of the {beta}{beta} decay nucleus {sup 96}Zr, the present result provides information about the nuclear matrix elements active in the 2{nu}{beta}{beta} decay of {sup 96}Zr.

  20. Observation of D>0 - D¯ 0 Mixing in e+e- Collisions

    SciTech Connect

    Ko, Byeong Rok; Won, E.; Adachi, I.; Aihara, H.; Arinstein, K.; Asner, David M.; Aulchenko, V.; Aushev, T.; Bala, Anu; Bhardwaj, V.; Bhuyan, Bipul; Bobrov, A.; Bondar, A.; Bozek, A.; Bracko, Marko; Browder, Thomas E.; Cervenkov, D.; Chen, A.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Cho, I- S.; Cho, K.; Chobanova, V.; Choi, S-K.; Choi, Y.; Cinabro, David A.; Dalseno, J.; Danilov, M.; Dolezal, Z.; Drasal, Z.; Dutta, Deepanwita; Dutta, K.; Eidelman, S.; Epifanov, D.; Farhat, H.; Fast, James E.; Ferber, T.; Gaur, Vipin; Ganguly, Sudeshna; Garmash, A.; Gillard, R.; Glattaur, R.; Goh, Y. M.; Golob, B.; Haba, J.; Hara, Takanori; Hayashii, H.; He, X. H.; Higuchi, T.; Hoshi, Y.; Hou, W. S.; Hyun, H. J.; Iijima, T.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Iwashita, T.; Jaegle, Igal; Julius, Travis; Kawasaki, T.; Kiesling, C.; Kim, D. Y.; Kim, J. B.; Kim, J. H.; Kim, M. J.; Kim, Y. J.; Klucar, Jure; Kodys, P.; Korpar, S.; Krizan, P.; Krokovny, Pavel; Kuhr, Thomas; Kumita, T.; Kuzmin, A.; Kwon, Y. J.; Lange, J. S.; Lee, S. H.; Li, J.; Li, Y.; Libby, J.; Liu, C.; Liu, Z. Q.; Lukin, P.; Matvienko, D.; Miyabayashi, K.; Miyata, H.; Mohanty, G. B.; Moll, A.; Mussa, Roberto; Nagasaka, Y.; Nakano, E.; Nakao, M.; Natkaniec, Z.; Nayak, Minakshi; Nedelkovska, E.; Nisar, N. K.; Nitoh, O.; Ogawa, S.; Okuno, S.; Pakhlova, Galina; Park, C. W.; Park, H. K.; Pedlar, Todd K.; Peng, T.; Petric, Marko; Piilonen, Leo E.; Ritter, M.; Rohrken, M.; Rostomyan, A.; Ryu, S.; Sahoo, Himansu B.; Sakai, Y.; Santelj, Luka; Sanuki, T.; Savinov, Vladimir; Schneider, O.; Schnell, G.; Schwanda, C.; Schwartz, Alan J.; Seidl, R.; Seon, O.; Sevior, Martin E.; Shapkin, M.; Shen, C. P.; Shibata, TA; Shiu, Jing-Ge; Shwartz, B.; Sibidanov, A.; Simon, F.; Singh, J. B.; Sohn, Y. S.; Sokolov, A.; Stanic, S.; Staric, M.; Steder, M.; Sumiyoshi, T.; Tamponi, Umberto; Tatishvili, Gocha; Teramoto, Y.; Trabelsi, K.; Uchida, M.; Uehara, S.; Uglov, T.; Unno, Yuji; Uno, S.; Urquijo, P.; Usov, Y.; Vahsen, Sven E.; Van Hulse, C.; Vanhoefer, P.; Varner, Gary; Vinokurova, A.; Vorobyev, V.; Wagner, M. N.; Wang, C. H.; Wang, M. Z.; Wang, P.; Watanabe, Y.; Yamamoto, H.; Yamashita, Y.; Yashchenko, S.; Yook, Youngmin; Zhang, C. C.; Zhang, Z. P.; Zhilich, V.; Zupanc, A.

    2014-03-17

    Here, we observe D>0 - D¯ 0 mixing in the decay D>0→K+π- using a data sample of integrated luminosity 976 fb-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. We also measure the mixing parameters x'2=(0.09±0.22)×10-3 and y'=(4.6±3.4)×10-3 and the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates RD=(3.53±0.13)×10-3, where the uncertainties are statistical and systematic combined. Our measurement excludes the no-mixing hypothesis at the 5.1 standard deviation level.

  1. Silver silicates with three-dimensional d{sup 10}-d{sup 10} interactions as visible light active photocatalysts for water oxidation

    SciTech Connect

    Kim, Tae-Gon; Yeon, Dong-Hee; Kim, Taehyung; Lee, Jeonghee; Im, Seoung-Jae

    2013-07-22

    Ag{sub 2}SiO{sub 3} and Ag{sub 9}(SiO{sub 4}){sub 2}NO{sub 3} with the short Ag–Ag bond distances close to metallic Ag have optical band gaps of 2.6 eV and 2.0 eV, respectively. They oxidized water molecules to oxygen with the rates of 98 and 194 μmol/g · h by the 280 mW/cm{sup 2} visible-light illumination, and decolorized organic dye more than 10 times faster than the commercialized WO{sub 3} and TiO{sub 2}. Based on the electronic structure calculation, their small band gaps and superior carrier transport property are correlated with the spatial proximity between Ag ions stabilized by d{sup 10}-d{sup 10} interaction, which promotes the descent and dispersion of conduction bands by increasing Ag 5s/5p orbital overlaps.

  2. Measurement of the left-right forward-backward asymmetry for charm quarks with {ital D}{sup *}+ and {ital D}{sup +} mesons

    SciTech Connect

    Abe, K.; Abt, I.; Ahn, C.J.; Akagi, T.; Allen, N.J.; Ash, W.W.; Aston, D.; Baird, K.G.; Baltay, C.; Band, H.R.; Barakat, M.B.; Baranko, G.; Bardon, O.; Barklow, T.; Bazarko, A.O.; Ben-David, R.; Benvenuti, A.C.; Bienz, T.; Bilei, G.M.; Bisello, D.; Blaylock, G.; Bogart, J.R.; Bolton, T.; Bower, G.R.; Brau, J.E.; Breidenbach, M.; Bugg, W.M.; Burke, D.; Burnett, T.H.; Burrows, P.N.; Busza, W.; Calcaterra, A.; Caldwell, D.O.; Calloway, D.; Camanzi, B.; Carpinelli, M.; Cassell, R.; Castaldi, R.; Castro, A.; Cavalli-Sforza, M.; Church, E.; Cohn, H.O.; Coller, J.A.; Cook, V.; Cotton, R.; Cowan, R.F.; Coyne, D.G.; D`Oliveira, A.; Damerell, C.J.S.; Daoudi, M.; De Sangro, R.; De Simone, P.; Dell`Orso, R.; Dima, M.; Du, P.Y.C.; Dubois, R.; Eisenstein, B.I.; Elia, R.; Falciai, D.; Fan, C.; Fero, M.J.; Frey, R.; Furuno, K.; Gillman, T.; Gladding, G.; Gonzalez, S.; Hallewell, G.D.; Hart, E.L.; Hasegawa, Y.; Hedges, S.; Hertzbach, S.S.; Hildreth, M.D.; Huber, J.; Huffer, M.E.; Hughes, E.W.; Hwang, H.; Iwasaki, Y.; Jackson, D.J.; Jacques, P.; Jaros, J.; Johnson, A.S.; Johnson, J.R.; Johnson, R.A.; Junk, T.; Kajikawa, R.; Kalelkar, M.; Karliner, I.; Kawahara, H.; Kendall, H.W.; Kim, Y.; King, M.E.; King, R.; Kofler, R.R.; Krishna, N.M.; Kroeger, R.S.; Labs, J.F.; Langston, M.; Lath, A.; Lauber, J.A.; Leith, D.W.G.; Liu, X.; Loreti, M.; Lu, A.; Lynch, H.L.; Ma, J.; Mancinelli, G.; Manly, S.; Mantovani, G.; Markiewicz, T.W.; Maruyama, T.; Massetti, R.; Masuda, H.; Mazzucato, E.; McKemey, A.K.; Meadows, B.T.; Messner, R.; Mockett, P.M.; Moffeit, K.C.; Mours, B.; Mueller, G.; Muller, D.; Nagamine, T.; Nauenberg, U.; Neal, H.; Nussbaum, M.; Ohnishi, Y.; Osborne, L.S.; Panvini, R.S.; Park, H.; Pavel, T.J.; Peruzzi, I.; Piccolo, M.; Piemontese, L.; Pieroni, E.; Pitts, K.T.; Plano, R.J.; Prepost, R.; Prescott, C.Y.; Punkar, G.D.; Quigley, J.; Ratcliff, B.N.; Reeves, T.W.; Rensing, P.E.; Rochester, L.S.; Rothberg, J.E.; Rowson, P.C.; Russell, J.J.; Saxton, O.H.; Schalk, T.; (SLD Collabor...

    1995-11-13

    We present a direct measurement of {ital A}{sub {ital c}}=2{ital v}{sub {ital c}}{ital a}{sub {ital c}}/({ital v}{sup 2}{sub {ital c}}+{ital a}{sup 2}{sub {ital c}}) from the left-right forward-backward asymmetry of {ital D}{sup *}+ and {ital D}{sup +} mesons in {ital Z}{sup 0} events produced with the longitudinally polarized SLAC Linear Collider beam. These {ital Z}{sup 0}{r_arrow}{ital c} over bar events are tagged on the basis of event kinematics and decay topology from a sample of hadronic {ital Z}{sup 0} decays recorded by the SLAC Large Detector. We measure {ital A}{sup 0}{sub {ital c}} = 0.73 {plus_minus} 0.22(stat) {plus_minus} 0.10(syst). {copyright} {ital 1995} {ital The} {ital American} {ital Physical} {ital Society}.

  3. Indirect CP violation and implications for D{sup 0}-D{sup 0} and B{sub s}-B{sub s} mixing

    SciTech Connect

    Kagan, Alexander L.; Sokoloff, Michael D.

    2009-10-01

    The two kinds of indirect CP violation in neutral meson systems are related, in the absence of new weak phases in decay. The result is a model-independent expression relating CP violation in mixing, CP violation in the interference of decays with and without mixing, and the meson mass and width differences. It relates the semileptonic and time-dependent CP asymmetries, and pairs of time-dependent CP asymmetries in D{sup 0} decays to non-CP eigenstates. CP violation in the interference of decays with and without mixing is related to the mixing parameters of relevance to model building: the off-diagonal mixing matrix elements |M{sub 12}|, |{gamma}{sub 12}|, and {phi}{sub 12}{identical_to}arg(M{sub 12}/{gamma}{sub 12}). Incorporating this relation into a fit to the D{sup 0}-D{sup 0} mixing data implies a level of sensitivity to |{phi}{sub 12}{sup D}| of 0.10 (rad) at 1{sigma}. The formalism is extended to include new weak phases in decay, and in {gamma}{sub 12}. The phases are highly constrained by direct CP violation measurements. Consequently, the bounds on |{phi}{sub 12}{sup D}| are not significantly altered, and the effects of new weak phases in decay could be difficult to observe at a high luminosity flavor factory (D{sup 0}) or at the LHC (B{sub s}) via violations of the above relations, unlike in direct CP violation.

  4. [sup 40]Ca([ital p],[ital d])[sup 39]Ca reaction at 65 MeV

    SciTech Connect

    Matoba, M.; Iwamoto, O.; Uozumi, Y.; Sakae, T. ); Koori, N. ); Fujiki, T.; Ohgaki, H.; Ijiri, H. ); Maki, T.; Nakano, M. )

    1993-07-01

    Cross sections and analyzing powers have been measured for the [sup 40]Ca([ital p],[ital d])[sup 39]Ca reaction with polarized proton beams of 65 MeV incident energy. The data analysis with a standard distorted-wave Born approximation theory provides transferred angular momenta [ital l], [ital j], and spectroscopic factors for 58 transitions mainly to the 1[ital d][sub 3/2], 2[ital s][sub 1/2], and 1[ital d][sub 5/2] hole states in [sup 39]Ca. The occupation probabilities of the surface shells in [sup 40]Ca and the spreading widths of the hole states are determined. The damping mechanism of the single hole states is discussed.

  5. BNL development of H/sup -//D/sup -/ sources for fusion reactor neutral beam lines

    SciTech Connect

    Prelec, K

    1980-01-01

    The long range program of the BNL Neutral Beam Development Group is to design a neutral beam system based on neutralization of negative ions, with an energy of 200 keV or higher, a D/sup -/ beam current of 10 A and operating in pulses of 5 s duration or longer; the beam system would be used on fusion devices for plasma heating. Presently, work is concentrated on the development of an H/sup -/ or D/sup -/ ion source, to deliver about 1 A of beam current, at an energy of at least 10 keV and operating in pulses longer than 5 s. A source of the magnetron type was designed and fabricated and is to be tested soon; the paper describes the background experiments that were necessary for the source design, the source parameters and design features, as well as a method under consideration that would improve the gas efficiency by an order of magnitude.

  6. Measurement of D* Production by Pions on Nucleons at s**(1/2) = 19-GeV/c

    SciTech Connect

    Fitch, L.; Montag, A.; Sherman, S.; Webb, R.; Witherell, M.; Devaux, B.; Teiger, J.; Turlay, R.; Zylberstejn, A.; Cavaglia, P.; Cester, R.; /Turin U. /Brookhaven

    1980-07-01

    The authors report results of an experiment to measure the cross section for the reaction {pi}{sup -} + N {yields} D*{sup {+-}} X at 200 GeV/c. They observe a 2.7 standard deviation signal corresponding to a D* production cross section d{sigma}/dy = 1.0 {+-} 0.4 {mu}b at y = 0.

  7. Preliminary measurements of the time dependence of B{sub d}{sup 0} - {bar B}{sub d}{sup 0} mixing with kaon and charge dipole tags

    SciTech Connect

    1996-07-01

    We report two preliminary measurements of the time dependence of B{sub d}{sup 0}- B{sub d}{sup 0} mixing using novel techniques with a sample of 150,000 hadronic Z{sup O} decays collected by the SLD experiment at the SLC. B decay vertices are reconstructed inclusively with a topological technique and the B hadron flavor at production is determined by exploiting the large left-right forward-backward asymmetry of Z{sup O} {r_arrow} b {bar b} decays in combination with a jet charge technique. Two methods are used to tag the B flavor at decay. The first uses the charge of kaons attached to the B decay vertex and identified with the Cherenkov Ring Imaging Detector. The second measurement is based on the construction of a charge dipole of the topological vertices to separate the B{sub d}{sup O}/B{sub d}{sup 0} decays by exploiting the B {r_arrow} D cascade charge structure. The measurement of the oscillation frequency yields {Delta}m{sub d} = 0.58 {+-} 0.07(stat){+-}0.08(syst) ps{sup -1} and 0.56 {+-} 0.08(stat){+-}0.04(syst) ps{sup {minus}1} for the kaon and dipole tags respectively.

  8. Measurement of indirect CP-violating asymmetries in D>0→K+K- and D>0→π+π- decays at CDF

    SciTech Connect

    Aaltonen, Timo Antero

    2014-12-30

    We report a measurement of the indirect CP-violating asymmetries (AΓ) between effective lifetimes of anticharm and charm mesons reconstructed in D>0→K+K- and D>0→π+π- decays. We use the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab experiment and corresponding to 9.7 fb-1 of integrated luminosity. The strong-interaction decay D*+→D0π+ is used to identify the meson at production as D>0 or D¯0. We statistically subtract D>0 and D¯0 mesons originating from b-hadron decays and measure the yield asymmetry between anticharm and charm decays as a function of decay time. We measure AΓ(K+K-)=(-0.19±0.15(stat)±0.04(syst))%and AΓ+π-)=(-0.01±0.18(stat)±0.03(syst))%. The results are consistent with the hypothesis of CP symmetry and their combination yields AΓ=(-0.12±0.12)%.

  9. Quantitative predictions for B semileptonic decays into D, D{sup {asterisk}}, and the orbitally excited D{sup {asterisk}{asterisk}} in quark models in the manner of Bakamjian and Thomas

    SciTech Connect

    Morenas, V.

    1997-11-01

    Once chosen the dynamics in one frame, the rest frame in this paper, the Bakamjian-Thomas method allows one to define relativistic quark models in any frame. These models have been shown to provide, in the infinite quark mass limit, fully covariant current form factors as matrix elements of the quark current operator. In this paper we use the rest frame dynamics fitted from the meson spectrum by various authors, already shown to provide a reasonable value for {rho}{sup 2}. From the general formulas for the scaling invariant form factors {xi}{sup (n)}(w), {tau}{sub 1/2}{sup (n)}(w), and {tau}{sub 3/2}{sup (n)}(w), we predict quantitavely the B semileptonic branching ratios to the ground state and orbitally excited charmed mesons D, D{sup {asterisk}}, and D{sup {asterisk}{asterisk}}. We check Bjorken{close_quote}s sum rule and discuss the respective contributions to it. We find {xi}(w){approx_equal}[2/(1+w)]{sup 2}, resulting from the fact that the ground state wave function is Coulomb-like. We also find {tau}{sub 3/2}{approx_equal}0.5[2/(1+w)]{sup 3} and {tau}{sub 1/2}(w){lt}{tau}{sub 3/2}(w). Very small branching ratios into j=1/2 orbitally excited D{close_quote}s results. The overall agreement with experiment is rather good within the present accuracy which is poor for the orbitally excited charmed mesons. We predict a ratio B(B{r_arrow}D{sub 2}{sup {asterisk}}l{nu})/B(B{r_arrow}D{sub 1}l{nu})=1.55{plus_minus}0.15 as a mere consequence of the heavy quark symmetry. If some faint experimental indications that B(B{r_arrow}D{sub 1}l{nu}){approx_equal}B(B{r_arrow}D{sub 2}{sup {asterisk}}l{nu}) were confirmed, it would indicate a sizable O(1/m{sub c}) correction. {copyright} {ital 1997} {ital The American Physical Society}

  10. Charm mixing in a model-independent analysis of correlated D{sup 0}D{sup 0} decays

    SciTech Connect

    Bondar, Alex; Vorobiev, Vitaly; Poluektov, Anton

    2010-08-01

    We investigate the impact of charm mixing on a model-independent {gamma} measurement using the Dalitz plot analysis of the three-body D decay from the B{sup +}{yields}DK{sup +} process, and show that ignoring the mixing at all stages of the analysis is safe up to a sub-degree level of precision. We also find that in the coherent production of the D{sup 0}D{sup *0} system in e{sup +}e{sup -} collisions, the effect of charm mixing is enhanced, and propose a model-independent method to measure charm mixing parameters in time-integrated Dalitz plot analysis at charm factories.

  11. Search for D>0 - anti-D0 Mixing and Branching-Ratio Measurement in the Decay D>0 to K+ pi- pi0

    SciTech Connect

    Aubert, B.

    2006-09-26

    The authors present a search for D{sup 0}-{bar D}{sup 0} mixing using regions of phase space in which the rate of doubly Cabibbo-suppressed decays D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0} relative to Cabibbo-favored decays D{sup 0} {yields} K{sup -} {pi}{sup +}{pi}{sup 0} is reduced. They analyze 230.4 fb{sup -1} of data collected with the BABAR detector at the PEP-II e{sup +}e{sup -} collider at SLAC. They present results with and without the assumption of CP conservation. Assuming CP conservation, they measure the time-integrated mixing rate R{sub M} = (0.023{sub -0.014}{sup +0.018}(stat.) {+-} 0.004(syst.))%, and R{sub M} < 0.054% at the 95% confidence level. They find that the data are consistent with no mixing at the 4.5% confidence level. Considering the entire allowed phase space, they measure the branching ratio for D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0} relative to D{sup 0} {yields} K{sup -} {pi}{sup +}{pi}{sup 0} to be (0.214 {+-} 0.008(stat.) {+-} 0.008(syst.))%.

  12. Collisional processes of interest in the MFE plasma research. Progress report No. 1

    SciTech Connect

    Olson, R E

    1980-01-31

    Research on this contract can be divided into two general topics: (1) D/sup -/ formation collision processes, and (2) the determination of scattering cross sections used to diagnose plasma properties. Research progress during the last four months is presented.

  13. Optical absorptions of the low-lying states with higher angular momenta of a D{sup -} system in a spherical quantum dot

    SciTech Connect

    Xie Wenfang

    2013-01-31

    Optical absorptions of the low-lying states with higher angular momenta of the D{sup -} system in a spherical quantum dot (QD) with the Gaussian potential are studied by using the matrix diagonalisation method and the compact density-matrix approach. The linear, nonlinear third-order and total optical absorption coefficients are calculated for the {sup 1}P{sup -} {yields} {sup 1}D{sup +} and {sup 1}D{sup +} {yields} {sup 1}F{sup -} transitions. Numerical results for GaAs/Ga{sub 1-x}Al{sub x}As QDs are presented. The calculated results show that with increasing quantum numbers describing the angular momenta of transitions the optical absorption peaks shift towards lower energies and their intensities increase. (quantum dots)

  14. Time-dependent wave-packet quantum scattering study of the reactions D{sup -}+H{sub 2}{yields}H{sup -}+HD and H{sup -}+D{sub 2}{yields}D{sup -}+HD

    SciTech Connect

    Yao Li; Ju Liping; Han Keli; Chu Tianshu

    2006-12-15

    The cross sections of the title reactions were calculated as functions of collision energy in the range 0.2-2.4 eV on a potential energy surface of Panda and Sathyamurthy [J. Chem. Phys. 121, 9343 (2004)]. The calculated results with the Coriolis coupled method were found to be more consistent with the experimental ones than the centrifugal sudden approximation, thus suggesting that Coriolis coupling plays an important role in those reactions. A pronounced isotopic effect was also revealed and attributed to the significant difference of the effective potential barrier height in both reactions.

  15. Tritium production, management and its impact on safety for a D-{sup 3}He fusion reactor

    SciTech Connect

    Sze, D.K.; Herring, S.; Sawan, M.

    1991-11-01

    About three percent of the fusion energy produced by a D-{sup 3}He reactor is in the form of neutrons. Those neutrons are generated by D-D and D-T reactions, with the tritium produced by the D-D fusion. The neutrons will react with structural steel, deuterium, {sup 3}He and shielding material to produce tritium. About half of the tritium generated by the D-D reaction will not burn in the plasma and will exit as a part of the plasma exhaust. Thus, there is enough tritium produced in a D-{sup 3}He reactor and careful management will be required. The tritium produced in the shield and plasma can be managed with an acceptable effect on cost and safety. 3 refs., 2 figs., 3 tabs.

  16. Preliminary measurement of time-dependent B{sub d}{sup 0}-B{sub d}{sup 0} mixing using topology and charge selected semi-leptonic B decays

    SciTech Connect

    1996-07-01

    The time dependence of B{sub d}{sup 0}-B{sub d}{sup 0} mixing has been measured using a sample of 150,000 hadronic Z{sup 0} decays collected by the SLD experiment at the SLC between 1993 and 1995. The analysis identifies the semileptonic decays of B mesons with high (p, p{sub t}) leptons and reconstructs the B meson decay length and charge by vertexing the lepton with a partially reconstructed D meson. Vertex charge is used to enrich the selection of neutral over charged B mesons. This method results in a sample of 581 neutral decays with high charge purity. The B candidate is tagged at production with a combined tag that exploits the large polarized b forward-backward asymmetry in conjunction with the opposite hemisphere b jet charge. The final state is tagged by the sign of the high (p, p{sub t}) lepton. From their preliminary analysis the authors find a mass difference between the two B{sub d}{sup 0} mass eigenstates of, {Delta}m{sub d} = 0.452 {+-} 0.074(stat) {+-} 0.049(syst) ps{sup {minus}1}.

  17. First model-independent determination of the relative strong phase between D{sup 0} and D{sup 0}{yields}K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} and its impact on the CKM angle {gamma}/{phi}{sub 3} measurement

    SciTech Connect

    Briere, R. A.; Vogel, H.; Onyisi, P. U. E.; Rosner, J. L.; Alexander, J. P.; Cassel, D. G.; Duboscq, J. E.; Ehrlich, R.; Fields, L.; Gibbons, L.; Gray, R.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; Hertz, D.; Hunt, J. M.; Kandaswamy, J.; Kreinick, D. L.; Kuznetsov, V. E.; Ledoux, J.

    2009-08-01

    We exploit the quantum coherence between pair-produced D{sup 0} and D{sup 0} in {psi}(3770) decays to make a first determination of the relative strong phase differences between D{sup 0}{yields}K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} and D{sup 0}{yields}K{sub S}{sup 0}{pi}{sup +}{pi}{sup -}, which are of great importance in determining the Cabibbo-Kobayashi-Maskawa angle {gamma}/{phi}{sub 3} in B{sup -}{yields}D{sup 0}(D{sup 0})K{sup -} decays. Using 818 pb{sup -1} of e{sup +}e{sup -} collision data collected with the CLEO-c detector at E{sub cm}=3.77 GeV, we employ a binned Dalitz-plot analysis of K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} and K{sub L}{sup 0}{pi}{sup +}{pi}{sup -} decays recoiling against flavor-tagged, CP-tagged, and K{sub S}{sup 0}{pi}{sup +}{pi}{sup -}-tagged events to determine these strong phase differences.

  18. The d{sup 10} metal-sulfosalicylate complexes: Herring-bone, ladder and double-stranded chain frameworks with green luminescences

    SciTech Connect

    Yan Chunfeng; Jiang Feilong; Chen Lian; Feng Rui; Yang Ming; Hong Maochun

    2009-11-15

    Assembly of 5-sulfosalicylic acid (H{sub 3}L) and d{sup 10} transition metal ions (Cd{sup II}, Ag{sup I}) with the neutral N-donor ligands produces five new complexes: [Cd{sub 2}(HL){sub 2}(4,4'-bipy){sub 3}]{sub n}.2nH{sub 2}O (1), {l_brace}[Cd{sub 2}(mu{sub 2}-HCO{sub 2}){sub 2}(4,4'-bipy){sub 2}(H{sub 2}O){sub 4}][Cd(HL){sub 2}(4,4'-bipy)(H{sub 2}O){sub 2}]{r_brace}{sub n} (2), {l_brace}[Cd(4,4'-bipy)(H{sub 2}O){sub 4}][HL].H{sub 2}O{r_brace}{sub n} (3), [Cd(HL)(dpp){sub 2}(H{sub 2}O)]{sub n}.4nH{sub 2}O (4), {l_brace}[Ag(4,4'-bipy)][Hhbs]{r_brace}{sub n} (5) (4,4'-bipy=4,4'-bipyridine, dpp=1,3-di(pyridin-4-yl)propane, H{sub 2}hbs=4-hydroxybenzenesulfonic acid, the decarboxylation product of H{sub 3}L). Complex 1 adopts a 5-connected 3D bilayer topology. Complex 2 has the herring-bone and ladder chain, which are extended to a 3D network via hydrogen bonding. In 3-4 complexes, 3 is a 3D supermolecular structure formed by polymeric chains and 2D network of HL{sup 2-}, while 4 gives the double-stranded chains. In 5, ladder arrays are stacked with the 2D networks of Hhbs{sup -} anions in an -ABAB- sequence. Complexes 1-4 display green luminescences in solid state at room temperature, while emission spectra of 3 and 4 show obvious blue-shifts at low temperature. - Graphical abstract: Reactions of 5-sulfosalicylic acid (H{sub 3}L) and d{sup 10} metal ions (Cd{sup II}, Ag{sup I}) produce five new complexes. Complexes 1-4 all display green luminescences at room temperature.

  19. Bulk Magnetic Order in a Two Dimensional Ni1+/Ni2+ (d9/d8) Nickelate, Isoelectronic with Superconducting Cuprates

    SciTech Connect

    Poltavets, V.; Lokshin, K; Nevidomskyy, A; Croft, M; Tyson, T; Hadermann, J; Van Tendeloo, G; Egami, T; Kotliar, G; et al.

    2010-01-01

    The Ni{sup 1+}/Ni{sup 2+} states of nickelates have the identical (3d{sup 9}/3d{sup 8}) electronic configuration as Cu{sup 2+}/Cu{sup 3+} in the high temperature superconducting cuprates, and are expected to show interesting properties. An intriguing question is whether mimicking the electronic and structural features of cuprates would also result in superconductivity in nickelates. Here we report experimental evidence for a bulklike magnetic transition in La{sub 4}Ni{sub 3}O{sub 8} at 105 K. Density functional theory calculations relate the transition to a spin density wave nesting instability of the Fermi surface.

  20. Absolute Branching Fraction Measurements of Exclusive D{sup +} Semileptonic Decays

    SciTech Connect

    Huang, G.S.; Miller, D.H.; Pavlunin, V.; Sanghi, B.; Shipsey, I.P.J.; Adams, G.S.; Chasse, M.; Cravey, M.; Cummings, J.P.; Danko, I.; Napolitano, J.; He, Q.; Muramatsu, H.; Park, C.S.; Park, W.; Thorndike, E.H.; Coan, T.E.; Gao, Y.S.; Liu, F.; Artuso, M.

    2005-10-28

    Using data collected at the {psi}(3770) resonance with the CLEO-c detector at the Cornell e{sup +}e{sup -} storage ring, we present improved measurements of the absolute branching fractions of D{sup +} decays to K{sup 0}e{sup +}{nu}{sub e}, {pi}{sup 0}e{sup +}{nu}{sub e}, K*{sup 0}e{sup +}{nu}{sub e}, and {rho}{sup 0}e{sup +}{nu}{sub e}, and the first observation and absolute branching fraction measurement of D{sup +}{yields}{omega}e{sup +}{nu}{sub e}. We also report the most precise tests to date of isospin invariance in semileptonic D{sup 0} and D{sup +} decays.

  1. Electronic structure of d{sup 0} vanadates obtained by x-ray absorption and emission spectroscopies

    SciTech Connect

    Herrera, G.; Jimenez-Mier, J.; Chavira, E.; Moewes, A.; Wilks, R.

    2009-01-29

    We present experimental results for x-ray absorption at the L{sub 2,3}-edge of vanadium in V{sub 2}O{sub 5}, YVO{sub 4} and LaVO{sub 4} compounds and at the M{sub 4,5}-edge of lanthanum in LaVO{sub 4} compound. The data are interpreted in terms of the multiplet structure of the transition metal ion V{sup 5+} (d{sup 0}) and rare earth ion La{sup 3+} (d{sup 10}). The data are compared with calculations in the free-ion approximation for La and including the effects of the D{sub 4h} ligand field and charge transfer for V. These calculations allow a direct interpretation of the absorption spectra. Good overall agreement between experiment and theory is found. We also show resonant x-ray emission (XES) data for these compounds obtained at the top of the L{sub 2} excitation.

  2. The electronic structure of d{sup 6} metal-acetylides

    SciTech Connect

    Renshaw, S.K.; Uplinger, A.B.; Bullock, R.M.; Humphrey, M.G.

    1997-12-31

    Gas-phase ultraviolet photoelectron spectroscopy has been used to investigate the electronic structure and bonding interactions of d{sup 6} piano-stool metal-acetylides of the general formulas CpML{sub 2}C{triple_bond} C-R [M = Ru, L = PMe{sub 3}, R = H, Me, {sup t}Bu, C{sub 6}H{sub 5}] and CpML{sub 2}C{triple_bond}C-p-C{sub 6}H{sub 4}-NO{sub 2} [M = Fe, Ru, L = CO; M = Ru, L = PMe{sub 3}]. Previous studies of analogous CpFe(CO){sub 2}C{triple_bond}C-R complexes found that the filled-filled interaction between the metal d electrons and the acetylide {pi} bond electrons dominates the shift of the first valence ionizations, and that backbonding of the metal d electrons into the acetylide {pi}* orbitals is very small. It is found here that the change to the second row transition metal and the substitution of phosphines for the carbonyls makes the metal more electron rich, but does not change the basic description of the metal interaction with the acetylide.

  3. Scalar resonances in a unitary {pi}{pi} S-wave model for D{sup +} {r_arrow} {pi}{sup+}{pi}{sup-}{pi}{sup+}.

    SciTech Connect

    Boito, D. R.; Dedonder, J.-P.; El-Bennich, B.; Leitner, O.; Loiseau, B.; Physics; Univ. Autonoma de Barcelona; Univ. de Sao Paulo; Univ. Paris; Pl. Jussieu; Lab. Nazionali de Frascati

    2009-02-19

    We propose a model for D{sup +} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup +} decays following experimental results which indicate that the two-pion interaction in the S wave is dominated by the scalar resonances f{sub 0}(600)/{sigma} and f{sub 0}(980). The weak decay amplitude for D{sup +} {yields} R{pi}{sup +}, where R is a resonance that subsequently decays into {pi}{sup +}{pi}{sup -}, is constructed in a factorization approach. In the S wave, we implement the strong decay R {yields} {pi}{sup +}{pi}{sup -} by means of a scalar form factor. This provides a unitary description of the pion-pion interaction in the entire kinematically allowed mass range m{sub {pi}{pi}}{sup 2} from threshold to about 3 GeV{sup 2}. In order to reproduce the experimental Dalitz plot for D{sup +} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup +}, we include contributions beyond the S wave. For the P wave, dominated by the {rho}(770){sup 0}, we use a Breit-Wigner description. Higher waves are accounted for by using the usual isobar prescription for the f{sub 2}(1270) and {rho}(1450){sup 0}. The major achievement is a good reproduction of the experimental m{sub {pi}{pi}}{sup 2} distribution, and of the partial as well as the total D{sup +} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup +} branching ratios. Our values are generally smaller than the experimental ones. We discuss this shortcoming and, as a by-product, we predict a value for the poorly known D {yields} {sigma} transition form factor at q{sup 2} = m{sub {pi}}{sup 2}.

  4. THE INITIAL CONDITIONS OF CLUSTERED STAR FORMATION. III. THE DEUTERIUM FRACTIONATION OF THE OPHIUCHUS B2 CORE

    SciTech Connect

    Friesen, R. K.; Di Francesco, J.; Myers, P. C.; Bourke, T. L.; Belloche, A.; Shirley, Y. L.; Andre, P.

    2010-08-01

    We present N{sub 2}D{sup +} 3-2 (IRAM), and H{sub 2}D{sup +} 1{sub 11}-1{sub 10} and N{sub 2}H{sup +} 4-3 (JCMT) maps of the small cluster-forming Ophiuchus B2 core in the nearby Ophiuchus molecular cloud. In conjunction with previously published N{sub 2}H{sup +} 1-0 observations, the N{sub 2}D{sup +} data reveal the deuterium fractionation in the high-density gas across Oph B2. The average deuterium fractionation R{sub D} = N(N{sub 2}D{sup +})/N(N{sub 2}H{sup +}) {approx} 0.03 over Oph B2, with several small scale R{sub D} peaks and a maximum R{sub D} = 0.1. The mean R{sub D} is consistent with previous results in isolated starless and protostellar cores. The column density distributions of both H{sub 2}D{sup +} and N{sub 2}D{sup +} show no correlation with total H{sub 2} column density. We find, however, an anticorrelation in deuterium fractionation with proximity to the embedded protostars in Oph B2 to distances {approx}>0.04 pc. Destruction mechanisms for deuterated molecules require gas temperatures greater than those previously determined through NH{sub 3} observations of Oph B2 to proceed. We present temperatures calculated for the dense core gas through the equating of non-thermal line widths for molecules (i.e., N{sub 2}D{sup +} and H{sub 2}D{sup +}) expected to trace the same core regions, but the observed complex line structures in B2 preclude finding a reasonable result in many locations. This method may, however, work well in isolated cores with less complicated velocity structures. Finally, we use R{sub D} and the H{sub 2}D{sup +} column density across Oph B2 to set a lower limit on the ionization fraction across the core, finding a mean x{sub e,lim} {approx}> few x 10{sup -8}. Our results show that care must be taken when using deuterated species as a probe of the physical conditions of dense gas in star-forming regions.

  5. Prospects for measuring CP violation in SDC using B{sub d}{sup 0} {yields} {psi}K{sub S}{sup 0}

    SciTech Connect

    Coupal, D.

    1993-06-01

    This note describes results of a study of acceptance and backgrounds in the SDC detector for the neutral B meson decay B{sub d}{sup 0} {yields} {psi}K{sub S}{sup 0}. The aim here is to explore the possibility of observing CP violation in the B system -- a significant physics measurement that may be possible at the SSC during the period of time when the accelerator is ramping up to design luminosity. Section 2 describes the theoretical predictions for b{bar b} quark production at the SSC and the signal for CP violation in the B meson system. The following section outlines the cuts used to isolate B{sub d}{sup 0} {yields} {psi}K{sub S}{sup 0} decays and presents the expected rates for signal and background. The next section discusses the sensitivity to CP violation parameters and the final section contains some additional comments.

  6. Defect induced d{sup 0} ferromagnetism in a ZnO grain boundary

    SciTech Connect

    Assa Aravindh, Sasikala Devi; Schwingenschloegl, Udo; Roqan, Iman S

    2015-12-14

    Several experimental studies have referred to the grain boundary (GB) defect as the origin of ferromagnetism in zinc oxide (ZnO). However, the mechanism of this hypothesis has never been confirmed. Present study investigates the atomic structure and the effect of point defects in a ZnO GB using the generalized gradient approximation+U approximation. The relaxed GB possesses large periodicity and channels with 8 and 10 numbered atoms having 4 and 3 fold coordination. The Zn vacancy (V{sub Zn}) shows a tendency to be attracted to the GB, relative to the bulk-like region. Although no magnetization is obtained from point defect-free GB, V{sub Zn} induces spin polarization as large as 0.68 μ{sub B}/atom to the O sites at the GB. Ferromagnetic exchange energy >150 eV is obtained by increasing the concentration of V{sub Zn} and by the injection of holes into the system. Electronic structure analysis indicates that the spin polarization without external dopants originates from the O 2p orbitals, a common feature of d{sup 0} semiconductors.

  7. D{sup 0}{yields}{gamma}{gamma} and D{sup 0}{yields}{mu}{sup +}{mu}{sup -} rates on an unlikely impact of the littlest Higgs model with T parity

    SciTech Connect

    Paul, Ayan; Bigi, Ikaros I.; Recksiegel, Stefan

    2010-11-01

    The decays D{sup 0}{yields}{gamma}{gamma}, {mu}{sup +}{mu}{sup -} are highly suppressed in the standard model (SM) with the lion's share of the rate coming from long distance dynamics; D{sup 0}{yields}{mu}{sup +}{mu}{sup -} is driven predominantly by D{sup 0}{yields}{gamma}{gamma}{yields}{mu}{sup +}{mu}{sup -}. Their present experimental bounds are small, yet much larger than SM predictions. New physics models like the littlest Higgs models with T parity (LHT) can induce even large indirect CP violation in D{sup 0} transitions. One would guess that LHT has a ''fighting chance'' to affect these D{sup 0}{yields}{gamma}{gamma}, {mu}{sup +}{mu}{sup -} rates in an observable way. We have found LHT contributions can be much larger than short distance SM amplitude by orders of magnitude. Yet those can barely compete with the long distance SM effects. If D{sup 0}{yields}{gamma}{gamma}, {mu}{sup +}{mu}{sup -} modes are observed at greatly enhanced rates, LHT scenarios will not be candidates for generating such signals. LHT-like frameworks will not yield larger D{sup 0}{yields}{gamma}{gamma}/{mu}{sup +}{mu}{sup -} rates as they are constrained by B and K rare decays.

  8. Analysis of D{sup +{yields}}K{sup -{pi}+}e{sup +{nu}}{sub e} and D{sup +{yields}}K{sup -{pi}+{mu}+}+{nu}{sub {mu}}semileptonic decays

    SciTech Connect

    Briere, R. A.; Vogel, H.; Onyisi, P. U. E.; Rosner, J. L.; Alexander, J. P.; Cassel, D. G.; Das, S.; Ehrlich, R.; Fields, L.; Gibbons, L.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; Hunt, J. M.; Kreinick, D. L.; Kuznetsov, V. E.; Ledoux, J.; Patterson, J. R.; Peterson, D.; Riley, D.

    2010-06-01

    Using a large sample ({approx_equal}11800 events) of D{sup +{yields}}K{sup -{pi}+}e{sup +{nu}}{sub e} and D{sup +{yields}}K{sup -{pi}+{mu}+{nu}}{sub {mu}}decays collected by the CLEO-c detector running at the {psi}(3770), we measure the helicity basis form factors free from the assumptions of spectroscopic pole dominance and provide new, accurate measurements of the absolute branching fractions for D{sup +{yields}}K*{sup 0}e{sup +{nu}}{sub e} and D{sup +{yields}}K*{sup 0{mu}+{nu}}{sub {mu}}decays. We find branching fractions which are consistent with previous world averages. Our measured helicity basis form factors are consistent with the spectroscopic pole dominance predictions for the three main helicity basis form factors describing D{sup +{yields}}K*{sup 0}l{sup +{nu}}{sub l} decay. The ability to analyze D{sup +{yields}}K{sup -{pi}+{mu}+{nu}}{sub {mu}}allows us to make the first nonparametric measurements of the mass-suppressed form factor. Our result is inconsistent with existing lattice QCD calculations. Finally, we measure the form factor that controls nonresonant s-wave interference with the D{sup +{yields}}K*{sup 0}l{sup +{nu}}{sub l} amplitude and search for evidence of possible additional nonresonant d- or f-wave interference with the K*{sup 0}.

  9. Synthesis, crystal structures and properties of three new mixed-ligand d{sup 10} metal complexes constructed from pyridinecarboxylate and in situ generated amino-tetrazole ligand

    SciTech Connect

    Liu Dongsheng; Huang, Xihe; Huang Changcang; Huang Gansheng; Chen Jianzhong

    2009-07-15

    Three new metal-organic frameworks, [Zn(atz)(nic)]{sub n}(1), [Zn(atz)(isonic)]{sub n}.nHisonic(2) and [Cd(atz)(isonic)]{sub n}(3) (Hnic=nicotinic acid, Hisonic=isonicotinic acid), have been firstly synthesized by employing mixed-ligand of pyridinecarboxylate with the in situ generated ligand of 5-amino-tetrazolate(atz{sup -}), and characterized by elemental analysis, IR spectroscopy, TGA and single crystal X-ray diffraction. The results revealed that 1 presents a two-dimensional (2D) 'sql' topological network constructed from the linear chain subunit of Zn(nic){sub 2} and atz{sup -} ligand. A remarkable feature of 2 is a 2-fold interpenetrated diamondoid network with free Hisonic molecules locating in the channels formed by the zigzag chain subunits of Zn(isonic){sub 2}. Complex 3 is a 3D non-interpenetrated pillared framework constructed from the double chain subunits of Cd-COO{sup -}Cd. It possesses a rarely observed (4,6)-connected 'fsc' topology. The thermal stabilities and fluorescent properties of the complexes were investigated. All of these complexes exhibited intense fluorescent emissions in the solid state at room temperature. - Graphical abstract: Three new mixed-ligand d{sup 10} metal complexes have been synthesized by employing mixed-ligand synthetic approach. Complex 1 presents a 2D 'sql' topological network. Complex 2 is a 2-fold interpenetrated diamondoid network with microporous channels. Rarely observed (4,6)-connected 'fsc' topological network was found in complex 3.

  10. Study of the D{sup 0{yields}{pi}+{pi}-{pi}0} decay at BABAR

    SciTech Connect

    Gaspero, Mario

    2010-08-05

    The Dalitz-plot of the decay D{sup 0{yields}{pi}+{pi}-{pi}0} measured by the BABAR collaboration shows the structure of a final state having quantum numbers I{sup G}J{sup PC} = 0{sup -}0{sup --}. An isospin analysis of this Dalitz-plot finds that the fraction of the I = 0 contribution is about 96%. This high I = 0 contribution is unexpected because the weak interaction violates the isospin.

  11. Relativistic many-body calculations of electric-dipole lifetimes, rates, and oscillator strengths of Delta(n) = 0 transitions between 3l^-1 4l' states in Ni-like ions

    SciTech Connect

    Safronova, U I; Safronova, A S; Beiersdorfer, P

    2007-01-05

    Transition rates, oscillator strengths, and line strengths are calculated for electric-dipole (E1) transitions between odd-parity 3s{sup 2}3p{sup 6}3d{sup 9}4{ell}{sub 2}, 3s{sup 2}3p{sup 5}3d{sup 10}4{ell}{sub 2}, and 3s3p{sup 6}3d{sup 10}4{ell}{sub 1} states and even-parity 3s{sup 2}3p{sup 6}3d{sup 9}4{ell}{sub 2}, 3s{sup 2}3p{sup 5}3d{sup 10}4{ell}{sub 1}, and 3s3p{sup 6}3d{sup 10}4{ell}{sub 2} (with 4{ell}{sub 1} = 4p; 4f and 4{ell}{sub 2} = 4s; 4d) in Ni-like ions with the nuclear charges ranging from Z = 34 to 100. Relativistic many-body perturbation theory (RMBPT), including the Breit interaction, is used to evaluate retarded E1 matrix elements in length and velocity forms. The calculations start from a 1s{sup 2}2s{sup 2}2p{sup 6}3s{sup 2}3p{sup 6}3d{sup 10} Dirac-Fock potential. First-order RMBPT is used to obtain intermediate coupling coefficients and second-order RMBPT is used to calculate transition matrix elements. Contributions from negative-energy states are included in the second-order E1 matrix elements to ensure the gauge independence of transition amplitudes. Transition energies used in the calculation of oscillator strengths and transition rates are from second-order RMBPT. Lifetimes of the 3s{sup 2}3p{sup 6}3d{sup 9}4d levels are given for Z = 34-100. Transition rates, line strengths, and oscillator strengths are compared with critically evaluated experimental values and with results from other recent calculations. These atomic data are important in modeling of M-shell radiation spectra of heavy ions generated in electron beam ion trap experiments and in M-shell diagnostics of plasmas.

  12. 1,1,2,2-Tetrachloroethane

    Integrated Risk Information System (IRIS)

    1,1,2,2 - Tetrachloroethane ; CASRN 79 - 34 - 5 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Noncar

  13. 1,1,2-Trichloropropane

    Integrated Risk Information System (IRIS)

    1,1,2 - Trichloropropane ; CASRN 598 - 77 - 6 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Noncarci

  14. 1,1,2-Trichloroethane

    Integrated Risk Information System (IRIS)

    1,1,2 - Trichloroethane ; CASRN 79 - 00 - 5 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Noncarcino

  15. 1,1,1,2-Tetrafluoroethane

    Integrated Risk Information System (IRIS)

    1,1,1,2 - Tetrafluoroethane ; CASRN 811 - 97 - 2 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Nonca

  16. PROBING THE EARLIEST STAGE OF PROTOSTELLAR EVOLUTION-BARNARD 1-bN AND BARNARD 1-bS

    SciTech Connect

    Huang, Yun-Hsin; Hirano, Naomi

    2013-04-01

    Two submm/mm sources in the Barnard 1b (B1-b) core, B1-bN and B1-bS, have been observed with the Submillimeter Array (SMA) and the Submillimeter Telescope (SMT). The 1.1 mm continuum map obtained with the SMA reveals that the two sources contain spatially compact components, suggesting that they harbor protostars. The N{sub 2}D{sup +} and N{sub 2}H{sup +} J = 3-2 maps were obtained by combining the SMA and SMT data. The N{sub 2}D{sup +} map clearly shows two peaks at the continuum positions. The N{sub 2}H{sup +} map also peaks at the continuum positions, but is more dominated by the spatially extended component. The N{sub 2}D{sup +}/N{sub 2}H{sup +} ratio was estimated to be {approx}0.2 at the positions of both B1-bN and B1-bS. The derived N{sub 2}D{sup +}/N{sub 2}H{sup +} ratio is comparable to those of the prestellar cores in the late evolutionary stage and the class 0 protostars in the early evolutionary stage. Although B1-bN is bright in N{sub 2}H{sup +} and N{sub 2}D{sup +}, this source was barely seen in H{sup 13}CO{sup +}. This implies that the depletion of carbon-bearing molecules is significant in B1-bN. The chemical property suggests that B1-bN is in the earlier evolutionary stage as compared to B1-bS with the H{sup 13}CO{sup +} counterpart. The N{sub 2}H{sup +} and N{sub 2}D{sup +} lines show that the radial velocities of the two sources are different by {approx}0.9 km s{sup -1}. However, the velocity pattern along the line through B1-bN and B1-bS suggests that these two sources were not formed out of a single rotating cloud. It is likely that the B1-b core consists of two velocity components, each of which harbors a very young source.

  17. Fusion gamma diagnostics for D-T and D-/sup 3/He plasmas

    SciTech Connect

    Medley, S.S.; Hendel, H.

    1982-11-01

    Nuclear reactions of interest in controlled thermonuclear fusion research often possess a branch yielding prompt emission of gamma radiation. In principle, the gamma emission can be exploited to provide a new fusion diagnostic offering measurements comparable to those obtained by the well established neutron diagnostics methods. The conceptual aspects for a fusion gamma diagnostic are discussed in this paper and the feasibility for application to the Tokamak Fusion Test Reactor during deuterium neutral beam heating of a D-T plasma and minority ion cyclotron resonance heating of a D-/sup 3/He plasma is examined.

  18. Measurement of the cp violation parameter sin 2 beta

    SciTech Connect

    K.F. Kelley

    1999-01-26

    This thesis presents a measurement of the time-dependent asymmetry in the rate of {anti B}{sub d}{sup 0} versus B{sub d}{sup 0} decays to J/{psi}K{sub s}{sup 0}. In the context of the Standard Model this is interpreted as a measurement of the CP violation parameter sin(2{beta}). A total of 198{+-}17 B{sub d}{sup 0}/{anti B}{sub d}{sup 0} decays were observed in p{anti p} collisions at {radical}s=1.8 TeV by the CDF detector at the Fermilab Tevatron. The initial B flavor (whether B{sup 0} or {anti B}{sup 0}) is determined by a same-side flavor tagging technique. The analysis results in sin(2{beta})=1.8{+-}1.1(stat.){+-}0.3(syst.). This analysis demonstrates the feasibility of studying CP violation in the B{sup 0}-{anti B}{sup 0} system at a hadron collider. By applying the methods used in this analysis, future, higher-statistics experiments should be able to tightly constrain the parameters of the Standard Model.

  19. Studies of thermal energy confinement scaling in PDX plasmas: D/sup 0/. -->. H/sup +/ limiter discharges

    SciTech Connect

    Kaye, S.M.; Goldston, R.J.; Bell, M.; Bol, K.; Bitter, M.; Fonck, R.; Grek, B.; Hawryluk, R.J.; Johnson, D.; Kaita, R.

    1984-06-01

    Experiments were performed on the PDX tokamak to study plasma heating and ..beta.. scaling with higher power, near-perpendicular neutral beam injection. The data taken during these experiments were analyzed using a time-dependent data interpretation code (TRANSP) to study the transport and thermal confinement scaling over a wide range of plasma parameters. This study focuses on results from experiments with D/sup 0/ injection into H/sup +/ plasmas using graphite rail limiters, a = 40 to 44 cm, R = 143 cm, I/sub p/ = 200 to 480 kA, B/sub T/ = 0.7 to 2.2 T, and typically anti n/sub e/ = 2.5 to 4.2 x 10/sup 13/ cm/sup -3/. The results of this study indicate that for both ohmic and neutral beam heated discharges the energy flow out of the plasma is dominated by anomalous electron losses, attributed to electron thermal conduction. The ion conduction losses are well described to electron thermal conduction. The ion conduction losses are well described by neoclassical theory; however, the total ion loss influences the power balance significantly only at high toroidal fields and high plasma currents.

  20. Relative phases in Dalitz plot amplitudes for D{sup 0{yields}}K{sub S{pi}}{sup +{pi}-} and D{sup 0{yields}{pi}0}K{sup +}K{sup -}

    SciTech Connect

    Bhattacharya, Bhubanjyoti; Rosner, Jonathan L.

    2010-10-01

    Relative phases of amplitudes for D meson decays to a light pseudoscalar meson P and a light vector meson V decaying to two pseudoscalar mesons will lead to characteristic interferences on the three-body Dalitz plot. These phases may be compared with predictions of a flavor-symmetric treatment which extracts contributing amplitudes and their relative phases from a fit to D{yields}PV decay rates. Good agreement was found previously for the cases of B{sup 0{yields}}K{sup +{pi}-{pi}0} and D{sup 0{yields}{pi}+{pi}-{pi}0}. The present work is devoted to the decays D{sup 0{yields}}K{sub S{pi}}{sup +{pi}-} and D{sup 0{yields}{pi}0}K{sup +}K{sup -}, for which agreement is not found. Several suggestions are offered for this discrepancy.

  1. 1,1,1,2-Tetrachloroethane

    Integrated Risk Information System (IRIS)

    1,1,1,2 - Tetrachloroethane ; CASRN 630 - 20 - 6 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Nonca

  2. Beam flavor dependence in the hadroproduction of D{sup {+-}} and D{sub s}{sup {+-}} mesons

    SciTech Connect

    Fermilab E769 Collaboration

    1994-07-01

    Fermilab E769, a fixed-target experiment conducted during the 1987--88 running period, yielded large numbers of charm particles. Through collisions of 250 GeV {pi}{sup {+-}}, K{sup {+-}}, and p on a multifoil target, E769 allows for studies of beam flavor dependence in the hadroproduction of charm. Through the decay modes D{sup +} {yields} K{sup {minus}}{pi}{sup +}{pi}{sup +}, D{sub s}{sup +} {yields} {phi}{pi}{sup +}, and D{sub s}{sup +} {yields} {anti K}{sup *0} K{sup +} (and charge conjugates), the authors have extracted D{sup {+-}} and D{sub s}{sup {+-}} signals for all five beam types. They report preliminary measurements of the beam dependence of the absolute production cross-sections (For Feynman x > 0) of the D{sup {+-}} and D{sub s}{sup {+-}}.

  3. Color suppressed contribution to B{sub d}{sup 0}{yields}{pi}0{pi}{sup 0}

    SciTech Connect

    Eeg, Jan O.; Palmer, Teresa

    2011-03-01

    The decay modes of the type B{yields}{pi}{pi} are dynamically different. For the case B{sub d}{sup 0}{yields}{pi}{sup +}{pi}{sup -} there is a substantial factorized contribution which dominates. In contrast, the decay mode B{sub d}{sup 0}{yields}{pi}{sup 0}{pi}{sup 0} has a small factorized contribution, being proportional to a small Wilson coefficient combination. However, for the decay mode B{sub d}{sup 0}{yields}{pi}{sup 0}{pi}{sup 0} there is a sizeable nonfactorizable (color suppressed) contribution due to soft (long distance) interactions, which dominate the amplitude. We estimate the branching ratio for the mode B{sub d}{sup 0}{yields}{pi}{sup 0}{pi}{sup 0} in the heavy quark limit for the b quark. In order to estimate color suppressed contributions we treat the energetic light (u, d, s) quark within a variant of Large Energy Effective Theory combined with a recent extension of chiral quark models in terms of model- dependent gluon condensates. We find that our calculated color suppressed amplitude is suppressed by a factor of order {Lambda}{sub QCD}/m{sub b} with respect to the factorizable amplitude, as it should according to QCD-factorization. Further, for reasonable values of the constituent quark mass and the gluon condensate, the calculated nonfactorizable amplitude for B{sub d}{sup 0}{yields}{pi}{sup 0}{pi}{sup 0} can easily accommodate the experimental value. Unfortunately, the color suppressed amplitude is very sensitive to the values of these model-dependent parameters. Therefore fine-tuning is necessary in order to obtain an amplitude compatible with the experimental result for B{sub d}{sup 0}{yields}{pi}{sup 0}{pi}{sup 0}. A possible link to the triangle anomaly is discussed.

  4. Particle dynamics design aspects for an IFMIF D{sup +} RFQ

    SciTech Connect

    Li, D.; Deitinghoff, H.; Klein, H.; Jameson, R.A.

    1996-10-01

    A conceptual design activity for an International Fusion Material Irradiation Facility (IFMIF) has been started to investigate the feasibility of an intense D-Li neutron source. As injector of the acceleration system, a RFQ is required to accept, bunch and accelerate a 125 mA D{sup +}-beam to 8 MeV with a very good beam quality for low losses in the following main accelerator part. To fulfill these severe requirements, extensive numerical calculations of the particle dynamics in the RFQ have been performed, with special emphasis on the equipartitioning design strategy, in which the temperatures in the transverse and longitudinal directions are balanced to prevent possible coupling resonances caused by the strong non-linear space charge forces. Design aspects and the resulting beam behaviors are presented.

  5. Substituted 1,1,1-Triaryl-2,2,2-Trifluoroethanes and processes for their synthesis

    NASA Technical Reports Server (NTRS)

    Alston, William B. (Inventor); Gratz, Roy F. (Inventor)

    1988-01-01

    Synthetic procedures are described for tetraalkyls, tetraacids and dianhydrides substituted 1,1,1-triaryl-2,2,2-trifluoroethanes which comprises: (1) 1,1-bis(dialkylaryl)-1 aryl-2,2,2-trifluoroethane; (2) 1,1-bis(dicarboxyaryl)-1 aryl-2,2,2-trifluoroethane; or (3) cyclic dianhydride or diamine of 1,1-bis(dialkylaryl)-1 aryl-2,2,2,-trifluoroethanes.

  6. CO{sub 2} exchange in the Hudson Bay lowlands: Community characteristics and multispectral reflectance properties

    SciTech Connect

    Whiting, G.J.

    1994-01-20

    Net ecosystem CO{sub 2} exchange was measured during the 1990 growing season (June to August) along a transect starting 10 km inland from James Bay and extending 100 km interior to Kinosheo Lake, Ontario. Sites were chosen in three distinct areas: a coastal fen, an interior fen, and a bog. For the most productive sites in the bog, net daily uptake rates reached a maximum of 2.5 g C-CO{sub 2} m{sup {minus}2} d{sup {minus}1} with an area-weighted exchange of 0.3 g C-CO{sub 2} m{sup {minus}2} d{sup {minus}1} near midsummer. The interior fen was less productive on a daily basis with a net maximum uptake of 0.5 g C-CO{sub 2} m{sup {minus}2} d{sup {minus}1} and with corresponding area-weighted uptake of 0.1 g C-CO{sub 2} m{sup {minus}2} d{sup {minus}1} during midsummer. Early and late season release of carbon to the atmosphere resulted in a net loss of 21 g C-CO{sub 2} m{sup {minus}2} over the growing season from this site. The coastal fen was the most productive site with uptake rates peaking near 1.7 g C-CO{sub 2} m{sup {minus}2} d{sup {minus}1} which corresponded to an area-weighted uptake of 0.8 g C-CO{sub 2} m{sup {minus}2} d{sup {minus}1} during midsummer and an estimated net uptake of 6 g C-CO{sub 2} m{sup {minus}2} for the growing season. These properties were related to exchange rates with the goal of examining the potential for satellite remote sensing to monitor biosphere/atmosphere CO{sub 2} exchange in this biome. The normalized difference vegetation index (NDVI) computed from surface reflectance was correlated with net CO{sub 2} exchange for all site with the exception of areas with large proportions of Sphagnum moss cover. These mosses have greater near-infrared reflectance than typical surrounding vegetation and may require special adjustment for regional exchange/remote sensing applications. 41 refs., 9 figs., 3 tabs.

  7. 1,2-Dichloroethane

    Integrated Risk Information System (IRIS)

    1,2 - Dichloroethane ; CASRN 107 - 06 - 2 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Noncarcinoge

  8. 2.1 Introduction

    NASA Astrophysics Data System (ADS)

    Bernhardt, J. H.; Kasch, K.-U.; Kaul, A.

    This document is part of Subvolume A 'Fundamentals and Data in Radiobiology, Radiation Biophysics, Dosimetry and Medical Radiological Protection' of Volume 7 'Medical Radiological Physics' of Landolt-Börnstein - Group VIII 'Advanced Materials and Technologies'. It contains the Section '2.1 Introduction' of the Chapter '2 Radiation and Biological Effects'.

  9. 1,2-Dichlorobenzene

    Integrated Risk Information System (IRIS)

    1,2 - Dichlorobenzene ; CASRN 95 - 50 - 1 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Noncarcinoge

  10. Structural Basis of the CD8[alpha beta]/MHC Class I Interaction: Focused Recognition Orients CD8[beta] to a T Cell Proximal Position[superscript 1,2

    SciTech Connect

    Wang, Rui; Natarajan, Kannan; Margulies, David H.

    2009-09-18

    In the immune system, B cells, dendritic cells, NK cells, and T lymphocytes all respond to signals received via ligand binding to receptors and coreceptors. Although the specificity of T cell recognition is determined by the interaction of T cell receptors with MHC/peptide complexes, the development of T cells in the thymus and their sensitivity to Ag are also dependent on coreceptor molecules CD8 (for MHC class I (MHCI)) and CD4 (for MHCII). The CD8{alpha}{beta} heterodimer is a potent coreceptor for T cell activation, but efforts to understand its function fully have been hampered by ignorance of the structural details of its interactions with MHCI. In this study we describe the structure of CD8{alpha}{beta} in complex with the murine MHCI molecule H-2D{sup d} at 2.6 {angstrom} resolution. The focus of the CD8{alpha}{beta} interaction is the acidic loop (residues 222-228) of the {alpha}3 domain of H-2D{sup d}. The {beta} subunit occupies a T cell membrane proximal position, defining the relative positions of the CD8{alpha} and CD8{beta} subunits. Unlike the CD8{alpha}{alpha} homodimer, CD8{alpha}{beta} does not contact the MHCI {alpha}{sub 2}- or {beta}{sub 2}-microglobulin domains. Movements of the CD8{alpha} CDR2 and CD8{beta} CDR1 and CDR2 loops as well as the flexibility of the H-2D{sup d} CD loop facilitate the monovalent interaction. The structure resolves inconclusive data on the topology of the CD8{alpha}{beta}/MHCI interaction, indicates that CD8{beta} is crucial in orienting the CD8{alpha}{beta} heterodimer, provides a framework for understanding the mechanistic role of CD8{alpha}{beta} in lymphoid cell signaling, and offers a tangible context for design of structurally altered coreceptors for tumor and viral immunotherapy.

  11. 26 CFR 2.1-1 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 14 2010-04-01 2010-04-01 false Definitions. 2.1-1 Section 2.1-1 Internal... CONSTRUCTION RESERVE FUND § 2.1-1 Definitions. (a) As used in the regulations in this part, except as otherwise expressly provided— (1) Act means the Merchant Marine Act, 1936, as amended (46 U.S.C. 27). (2)...

  12. Poloidally and radially resolved parallel D{sup +} velocity measurements in the DIII-D boundary and comparison to neoclassical computations

    SciTech Connect

    Boedo, J. A.; Hollmann, E.; Rudakov, D. L.; Groebner, R. J.; Moyer, R. A.; Porter, G. D.; Muller, S.; Tynan, G.; Belli, E. A.; Prater, R.; Candy, J.; Burrell, K. H.; Grassie, J. S. de; Leonard, A. W.; Brooks, N. H.; Solomon, W. M.; Watkins, J. G.; Lasnier, C. J.; Unterberg, E. A.

    2011-03-15

    First measurements of the D{sup +} parallel velocity, V{sub ||}{sup D+}, in L-mode discharges in the DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] tokamak boundary region at two poloidal locations, {theta}{approx}0 deg. and {theta}{approx}255 deg., made using Mach probes, feature a peak with velocities of up to 80 km/s at the midplane last closed flux surface (LCFS), as high as ten times the charge exchange recombination C{sup 6+} toroidal velocity, V{sub {phi}}{sup C6+}, in the same location. The V{sub ||}{sup D+} profiles are very asymmetric poloidally, by a factor of 8-10, and feature a local peak at the midplane. This peak, 1-2 cm wide, is located at or just inside the LCFS, and it suggests a large source of momentum in that location. This momentum source is quantified at {approx}0.31 N m by using a simple momentum transport model. This is the most accurate measurement of the effects of so called 'intrinsic' edge momentum source to date. The V{sub ||}{sup D+} measurements are quantitatively consistent with a purely neoclassical computational modeling of V{sub ||}{sup D+} by the code NEO[E. A. Belli and J. Candy, Plasma Phys. Controlled Fusion 50, 095010 (2008)], using V{sub {phi}}{sup C6+} as input, for {rho}{approx}0.7-0.95 at the two poloidal locations, where V{sub ||}{sup D+} measurements exist. The midplane NEO-calculated V{sub ||}{sup D+} grows larger than V{sub ||}{sup C6+} in the steeper edge gradient region and trends to agreement with the probe-measured V{sub ||}{sup D+} data near {rho}{approx}1, where the local V{sub ||}{sup D+} velocity peak exists. The measurements and computations were made in OH and L-mode discharges on an upper single null, with ion {nabla}B{sub T} drift away from the divertor. The rotating layer finding is similar in auxiliary heated discharges with and without external momentum input, except that at higher density the edge velocity weakens.

  13. Relativistic many-body calculations of lifetimes, rates, and line strengths of multipole transitions between 3l-1 4l' states in Ni-like ions

    SciTech Connect

    Safronova, U I; Safronova, A S; Beiersdorfer, P

    2007-10-08

    Transition rates and line strengths are calculated for electric-multipole (E2 and E3) and magnetic-multipole (M1, M2, and M3) transitions between 3s{sup 2}3p{sup 6}3d{sup 10}, 3s{sup 2}3p{sup 6}3d{sup 9}4l, 3s{sup 2}3p{sup 5}3d{sup 10}4l, and 3s3p{sup 6}3d{sup 10}4l states (with 4l = 4s, 4p, 4d, and 4f) in Ni-like ions with the nuclear charges ranging from Z = 34 to 100. Relativistic many-body perturbation theory (RMBPT), including the Breit interaction, is used to evaluate retarded multipole matrix elements. Transition energies used in the calculation of line strengths and transition rates are from second-order RMBPT. Lifetimes of the 3s{sup 2}3p{sup 6}3d{sup 9}4s levels are given for Z = 34-100. Taking into account that calculations were performed in a very broad range of Z, most of the data are presented in graphs as Z-dependencies. The full set of data is given only for Ni-like W ion. In addition, we also give complete results for the 3d4s{sup 3}D{sub 2}-3d4s {sup 3}D{sub 1} magnetic-dipole transition, as the transition may be observed in future experiments, which measure both transition energies and radiative rates. These atomic data are important in the modeling of radiation spectra from Ni-like multiply-charged ions generated in electron beam ion trap experiments as well as for laboratory plasma diagnostics including fusion research.

  14. 1,2-Dichloropropane

    Integrated Risk Information System (IRIS)

    1,2 - Dichloropropane ; CASRN 78 - 87 - 5 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Noncarcinoge

  15. 1,2-Diphenylhydrazine

    Integrated Risk Information System (IRIS)

    1,2 - Diphenylhydrazine ; CASRN 122 - 66 - 7 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Noncarcin

  16. 1,2-Dibromoethane

    Integrated Risk Information System (IRIS)

    1,2 - Dibromoethane ; CASRN 106 - 93 - 4 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Noncarcinogen

  17. Determination of the D{sup 0}{yields}K{sup -}{pi}{sup +}{pi}{sup 0} and D{sup 0}{yields}K{sup -}{pi}{sup +}{pi}{sup +}{pi}{sup -} coherence factors and average strong-phase differences using quantum-correlated measurements

    SciTech Connect

    Lowrey, N.; Mehrabyan, S.; Selen, M.; Wiss, J.; Mitchell, R. E.; Shepherd, M. R.; Besson, D.; Pedlar, T. K.; Cronin-Hennessy, D.; Gao, K. Y.; Hietala, J.; Kubota, Y.; Klein, T.; Poling, R.; Scott, A. W.; Zweber, P.; Dobbs, S.; Metreveli, Z.; Seth, K. K.; Tan, B. J. Y.

    2009-08-01

    The first measurements of the coherence factors (R{sub K{pi}}{sub {pi}{sup 0}} and R{sub K3{pi}}) and the average strong-phase differences ({delta}{sub D}{sup K{pi}}{sup {pi}{sup 0}} and {delta}{sub D}{sup K3{pi}}) for D{sup 0}{yields}K{sup -}{pi}{sup +}{pi}{sup 0} and D{sup 0}{yields}K{sup -}{pi}{sup +}{pi}{sup +}{pi}{sup -} are presented. These parameters can be used to improve the determination of the unitarity triangle angle {gamma} in B{sup -}{yields}DK{sup -} decays, where D is a D{sup 0} or D{sup 0} meson decaying to the same final state. The measurements are made using quantum-correlated, fully reconstructed D{sup 0}D{sup 0} pairs produced in e{sup +}e{sup -} collisions at the {psi}(3770) resonance. The measured values are: R{sub K{pi}}{sub {pi}{sup 0}}=0.84{+-}0.07, {delta}{sub D}{sup K{pi}}{sup {pi}{sup 0}}=(227{sub -17}{sup +14}) deg., R{sub K3{pi}}=0.33{sub -0.23}{sup +0.20}, and {delta}{sub D}{sup K3{pi}}=(114{sub -23}{sup +26}) deg. These results indicate significant coherence in the decay D{sup 0}{yields}K{sup -}{pi}{sup +}{pi}{sup 0}, whereas lower coherence is observed in the decay D{sup 0}{yields}K{sup -}{pi}{sup +}{pi}{sup +}{pi}{sup -}. The analysis also results in a small improvement in the knowledge of other D-meson parameters, in particular, the strong-phase difference for D{sup 0}{yields}K{sup -}{pi}{sup +}, {delta}{sub D}{sup K{pi}}, and the mixing parameter y.

  18. Vapor-liquid equilibria for 1,1,1,2-tetrafluoroethane + 1-chloro-1,2,2,2-tetrafluoroethane and 1-chloro-1,2,2,2-tetrafluoroethane + 1-chloro-1,1-difluoroethane systems

    SciTech Connect

    Lee, J.; Lee, J.; Kim, H.

    1996-07-01

    Isothermal vapor-liquid equilibria were determined for two binary mixtures of refrigerants with a circulation type apparatus. The 1,1,1,2-tetrafluoroethane (HFC-134a) + 1-chloro-1,2,2,2-tetrafluoroethane (HCFC-124) system was studied at 296.45, 302.25, and 307.25 K. The 1-chloro-1,2,2,2-tetrafluoroethane (HCFC-124) + 1-chloro-1,1-difluoroethane (HCFC-142b) system was studied at 298.15 and 312.15 K. At each temperature, the pressure and vapor and liquid compositions were measured. Results were correlated with the Peng-Robinson equation of state.

  19. D{sup 0} magnetism in Ca doped narrow carbon nanotubes: First principle chirality effect study

    SciTech Connect

    Hajiheidari, F.; Khoshnevisan, B.; Hashemifar, S. J.

    2014-06-21

    Curvature has always had crucial effects on the physical properties of narrow carbon nanotubes (CNTs) and here spin-polarized density functional calculations were employed to study electronic and magnetic properties of calcium-decorated narrow (5,5) and (9,0)CNTs with close diameters (∼7 Å) and different chiralities. Our results showed that chirality had great impact on the electronic structure and magnetization of the doped CNTs. In addition, internally or externally doping of the calcium atoms was studied comparatively and although for the (9,0)CNT the internal doping was the most stable configuration, which involves a novel kind of spin-polarization originated from Ca-4s electrons, but for the (5,5)tube the external doping was the most stable one without any spin-polarization. On the other hand, calcium doping in the center of the (5,5)CNT was an endothermic process and led to the spin-polarization of unoccupied Ca-3d orbitals via direct exchange interaction between adjacent Ca atoms. In the considered systems, the existence of magnetization in the absence of any transition-metal elements was an example of valuable d{sup 0} magnetism title.

  20. IEC Based D-{sup 3}He Fusion for Space Propulsion

    SciTech Connect

    Miley, George H.; Burton, R.; Richardson, N.; Shaban, Y.; Momota, Hiromu

    2002-07-01

    A preliminary system design is presented for a high performance 100-MWe manned space vehicle in the 500 metric ton class, based on Inertial Electrostatic Fusion (IEC), allowing trip times to the outer planets of several months. An IEC is chosen because it's simplified structure results in a very high power-to-weight ratio. D-{sup 3}He fuel is used to give 14.7-MeV protons as a primary fusion reaction product. Direct conversion of proton energy to electricity is employed, providing a high efficiency. An IEC reactor with a proton energy gain (power in 14.7-MeV protons/input electric power) of 4 or better is assumed. Extrapolation of present laboratory scale IEC experiments to such conditions is possible theoretically, but faces several open issues that require further study such as stability under high-density conditions. The final thruster is based on an NSTAR-extrapolated krypton ion design with a specific impulse of 16,000 seconds and a total thrust of 1020 N. Round trip thrust time for mission set to Jupiter {delta}V of 100 km/s is then {approx}950 days. (authors)

  1. What is the valence of Mn in Ga1-xMnxN?

    SciTech Connect

    Berlijn, Tom; Jarrell, Mark; Nelson, Ryky; Ku, Wei; Moreno, Juana

    2015-11-04

    Motivated by the potential high Curie temperature of Ga1-xMnxN, we investigate the controversial Mn valence in this diluted magnetic semiconductor. From a first-principles Wannier-function analysis of the high energy Hilbert space, we find unambiguously the Mn valence to be close to 2+(d>5), but in a mixed spin configuration with average magnetic moments of 4µB. By integrating out high-energy degrees of freedom differently, we further demonstrate the feasibility of both effective d>4 and d>5 descriptions. These two descriptions offer simple pictures for local and extended properties of the system, and highlight the dual nature of its doped hole. Specifically, in the effective d>5 description, we demonstrate novel physical effects absent in previous studies. Thus, our derivation highlights the richness of low-energy sectors in interacting many-body systems and the generic need for multiple effective descriptions.

  2. Charm and beauty searches using electron -D{sup 0} azimuthal correlations and microvertexing techniques in STAR experiment at RHIC

    SciTech Connect

    Geromitsos, Artemios

    2010-12-22

    The energy loss of heavy quarks in the hot and dense matter created at RHIC, can be used to probe the properties of the medium. Both charm and beauty quarks contribute to the non-photonic electrons through their semi-leptonic decays. It is essential to determine experimentally the relative contribution of charm and beauty quarks to understand the suppression of heavy flavors at high p{sub T} in central Au+Au collisions. The azimuthal angular correlations of non-photonic electrons with the reconstructed D{sup 0} allow to disentangle the contribution of charm and beauty and to reduce the background below the D{sup 0} invariant mass as well. We discuss the STAR measurement of non-photonic electron and D{sup 0{yields}}K{sup -{pi}+} azimuthal correlations in p+p collisions at 200 GeV. Furthermore, we show results from the application of microvertexing techniques for charm and beauty searches in Cu+Cu and Au+Au collisions at 200 GeV using the information of the Silicon tracker of STAR.

  3. Structural Analysis of H2-Db Class I Molecules Containing Two Different Allelic Forms of the type 1 Diabetes Susceptibility Factor beta-2 Microglobulin: Implications for the Mechanism Underlying Viriations in Antigen Presentation

    SciTech Connect

    Roden,M.; Brims, D.; Fedorov, A.; DiLorenzo, T.; Almo, S.; Nathenson, s.; Anovitz, L.; Wesolowski, D.

    2006-01-01

    Beta-2 microglobulin ({beta}2m) is a member of the immunoglobulin-like domain superfamily that is an essential structural subunit of the MHC class I (MHC-I) molecule. {beta}2m was previously identified as a susceptibility factor for the development of type 1 diabetes (T1D) in NOD mice, whereby transgenic expression of the {beta}2m{sup a} variant, but not the {beta}2mb variant, restored diabetes susceptibility to normally resistant NOD.{beta}2m{sup null} mice. Here we report the crystal structures and thermodynamic stabilities of the NOD MHC-I molecule H2-D{sup b} containing these two variants. Our results reveal subtle differences in the structures of the {beta}2m variants, namely in minor loop shifts and in variations in the hydrogen bonding networks at the interfaces between the components of the ternary complex. We also demonstrate that the thermodynamic stabilities of the {beta}2m variants in isolation differ. However, the conformation of the peptide in the MHC cleft is unchanged in {beta}2m allelic Db complexes, as are the TCR recognition surfaces. Thus, despite modest structural differences between allelic complexes, the evidence indicates that D{sup b} peptide presentation of the representative peptide is unchanged in the context of either {beta}2m allelic variant. These data suggest that other mechanisms, such as differential association of MHC-I in multiprotein complexes, are likely responsible for the effect of {beta}2m on T1D development.

  4. Triton 2 (1B)

    NASA Technical Reports Server (NTRS)

    Clark, Michelle L.; Meiss, A. G.; Neher, Jason R.; Rudolph, Richard H.

    1994-01-01

    The goal of this project was to perform a detailed design analysis on a conceptually designed preliminary flight trainer. The Triton 2 (1B) must meet the current regulations in FAR Part 23. The detailed design process included the tasks of sizing load carrying members, pulleys, bolts, rivets, and fuselage skin for the safety cage, empennage, and control systems. In addition to the regulations in FAR Part 23, the detail design had to meet established minimums for environmental operating conditions and material corrosion resistance.

  5. Syntheses, crystal structures and fluorescent properties of Cd(II), Hg(II) and Ag(I) coordination polymers constructed from 1H-1,2,4-triazole-1-acetic acid

    SciTech Connect

    Ding Degang; Xie Lixia; Fan Yaoting; Hou Hongwei; Xu Yan

    2009-06-15

    Three new d{sup 10} coordination polymers, namely [Cd(taa)Cl]{sub n}1, [Hg(taa)Cl]{sub n}2, and [Ag{sub 1.5}(taa)(NO{sub 3}){sub 0.5}]{sub n}3 (taa=1H-1,2,4-triazole-1-acatate anion) have been prepared and characterized by elemental analysis, IR, and single crystal X-ray diffraction. Compound 1 consists of two-dimensional layers constructed by carboxyl-linked helical chains, which are further linked through carboxyl group to generate a unique 3D open framework. Topological analysis reveals that the structure of 1 can be classified as an unprecedented (3,8)-connected network with the Schlaefli symbol (4.5{sup 2}){sub 2}(4{sup 2}.5{sup 8}.6{sup 14}.7{sup 3}.8). Compound 2 manifests a doubly interpenetrated decorated alpha-polonium cubic network with the Schlaefli symbol of (4{sup 10}.6{sup 2}.8{sup 3}). Compound 3 consists of 2D puckered layers made up of Ag centers and taa{sup -} bridges. In addition, all of these compounds are photoluminescent in the solid state with spectra that closely resemble those of the ligand precursor. - Graphical abstract: Three new compounds based on 1H-1,2,4-triazole-1-acetic acid and Cd(II), Hg(II) and Ag(I) salts display luminescent properties and may be potential candidates for luminescent materials.

  6. Substituted 1,1,1-Triaryl-2,2,2-Trifluoroethanes and Processes for their Synthesis

    NASA Technical Reports Server (NTRS)

    Alston, William B. (Inventor); Gratz, Roy F. (Inventor)

    1999-01-01

    Synthetic procedures to tetraalkyls. tetraacids and dianhydrides substituted 1,1,1-triaryl-2,2,2-trifluoroethanes which comprises: (1) 1.1-bis(dialkylaryl)-1-aryl-2,2,2 -trifluoroethane, (2) 1,1-bis(dicarboxyaryl)-1-aryl-2.2,2- trifluoroethane or (3) cyclic dianhydride or diamine of 1,1-bis(dialkylaryl)-1-aryl-2,2,2- trifluoroethanes. The synthesis of (1) is accomplished by the condensation reaction of an aryltrifluoromethyl ketone with a dialkylaryl compound. The synthesis of (2) is accomplished by oxidation of (1). The synthesis dianhydride of (3) is accomplished by the conversion of (2) to its corresponding cyclic dianhydride. The synthesis of the diamine is accomplished by the similar reaction of an aryltrifluoromethyl ketone with aniline or alkyl substituted or disubstituted anihnes. Also, other derivatives of the above are formed by nucleophilic displacement reactions.

  7. Substituted 1,1,1-triaryl-2,2,2-trifluoroethanes and processes for their synthesis

    NASA Technical Reports Server (NTRS)

    Alston, William B. (Inventor); Gratz, Roy F. (Inventor)

    1994-01-01

    Synthetic procedures are given for tetraalkyl, tetraacid and dianhydrides substituted 1,1,1-triaryl-2,2,2-trifluoroethanes which comprises: (1) 1,1-bis (dialkylaryl) 1-aryl-2,2,2 trifluoroethane; (2) 1,1-bis (dicarboxyaryl) 1-aryl-2,2,2 trifluoroethane; or (3) cyclic dianhydride or diamine of 1,1-bis (dialkylaryl) 1-aryl-2,2,2 trifluoroethanes. The synthesis of (1) is accomplished by the condensation reaction of an aryltrifluoromethyl ketone with a dialkylaryl compound. The synthesis of (2) is accomplished by oxidation of (1). The synthesis dianhydride of (3) is accomplished by the conversion of (2) to its corresponding cyclic dianhydride. The synthesis of the diamine is accomplished by the similar reaction of an aryltrifluoromethyl ketone with aniline or alkyl substituted or disubstituted anilines. Also, other derivatives of the above are formed by nucleophilic displacement reactions.

  8. Substituted 1,1,1-triaryl 2,2,2-trifluoroethanes and processes for their synthesis

    NASA Technical Reports Server (NTRS)

    Alston, William B. (Inventor); Gratz, Roy F. (Inventor)

    1992-01-01

    Synthetic procedures to tetraalkyls, tetraacids, and dianhydrides substituted 1,1,1-triaryl 2,2,2-trifluoroethanes which comprises: (1) 1,1-bis(dialkylaryl) 1-aryl-2,2,2-trifluoroethane, (2) 1,1-bis(dicarboxyaryl) 1-aryl-2,2,2-trifluoroethane, or (3) cyclic dianhydride or diamine of 1,1-bis(dialkylaryl) 1-aryl-2,2,2-trifluoroethanes. The synthesis of (1) is accomplished by the condensation reaction of an aryltrifluoromethyl ketone with a dialkylaryl compound. The synthesis of (2) is accomplished by oxidation of (1). The synthesis dianhydride of (3) is accomplished by the conversion of (2) to its corresponding cyclic dianhydride. The synthesis of the diamine is accomplished by the similar reaction of an aryltrifluoromethyl ketone with aniline or alkyl substituted or disubstituted anilines. Also, other derivatives of the above are formed by nucleophilic displacement reactions.

  9. Substituted 1,1,1-triaryl-2,2,2-trifluoroethanes and processes for their synthesis

    NASA Technical Reports Server (NTRS)

    Alston, William B. (Inventor); Gratz, Roy F. (Inventor)

    1989-01-01

    Synthetic procedures are disclosed for tetraalkyls, tetraacids, and dianhydrides substituted 1,1,1-triaryl 2,2,2-trifluoroethanes which comprises: (1) 1,1-bis (dialkylaryl) 1-aryl 2,2,2-trifluoroethane, (2) 1,1-bis (dicarboxyaryl) 1-aryl 2,2,2-trifluoroethane, or (3) cyclic dianhydride or diamine of 1,1-bis (dialkylaryl) 1-aryl 2,2,2-trifluoroethanes. The synthesis of (1) is accomplished by the condensation reaction of an aryltrifluoromethyl ketone with a dialkylaryl compound. The synthesis of (2) is accomplished by the oxidation of (1). The synthesis dianhydride of (3) is accomplished by the conversion of (2) to its corresponding cyclic dianhydride. The synthesis of the diamine is accomplished by the similar reaction of an aryltrifluoromethyl ketone with aniline or aklyl substituted or disubstituted anilines. Also, other derivatives of the above are formed by nucleophilic displacement reactions.

  10. Eddy covariance mapping and quantification of surface CO2 leakage fluxes

    SciTech Connect

    Lewicki, J.L.; Hilley, G.E.

    2009-08-01

    We present eddy covariance measurements of net CO{sub 2} flux (F{sub c}) made during a controlled release of CO{sub 2} (0.3 t d{sup -1} from 9 July to 7 August 2008) from a horizontal well {approx}100 m in length and {approx}2.5 m in depth located in an agricultural field in Bozeman, MT. We isolated fluxes arising from the release (F{sub cr}) by subtracting fluxes corresponding to a model for net ecosystem exchange from F{sub c}. A least-squares inversion of 611 F{sub cr} and corresponding modeled footprint functions recovered the location, length, and magnitude of the surface CO{sub 2} flux leakage signal, although high wavenumber details of the signal were poorly resolved. The estimated total surface CO{sub 2} leakage rate (0.32 t d{sup ?1}) was within 7% of the release rate.

  11. Observation of a New D_s Meson Decaying to D K at a Mass of 2.86 GeV/c^2

    SciTech Connect

    Aubert, B.

    2006-10-04

    The authors observe a new D{sub s} meson with mass (2856.6 {+-} 1.5{sub stat.} {+-} 5.0{sub syst.}) MeV/c{sup 2} and width (48 {+-} 7{sub stat.} {+-} 10{sub syst.}) MeV/c{sup 2} decaying into D{sup 0}K{sup +} and D{sup +}K{sub S}{sup 0}. In the same mass distributions they also observe a broad structure with mass (2688 {+-} 4{sub stat.} {+-} 3{sub syst.}) MeV/c{sup 2} and width (112 {+-} 7{sub stat.} {+-} 36{sub syst.}) MeV/c{sup 2}. To obtain this result they use 240 fb{sup -1} of data recorded by the BABAR detector at the PEP-II asymmetric e{sup +}e{sup -} storage rings at the Stanford Linear Accelerator Center running at center-of-mass energies near 10.6 GeV.

  12. 26 CFR 1.453-1-1.453-2 - [Reserved

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 6 2010-04-01 2010-04-01 false 1.453-1-1.453-2 Section 1.453-1-1.453-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES Taxable Year for Which Items of Gross Income Included §§ 1.453-11.453-2...

  13. Boeing XF2B-1 (F2B-1)

    NASA Technical Reports Server (NTRS)

    1931-01-01

    Boeing XF2B-1 (F2B-1): Serving as the prototype for the F2B-1 shipboard fighter, the XF2B-1 differed visually in having a pointed spinner and an unbalanced rudder. Like many aircraft of its day, the Boeing model 69 was powered by a Pratt & Whitney Wasp radial engine.

  14. Study of Charged Particle Species Produced in Association with B0, B-, and Bs Mesons in proton - anti-proton collisions at s**(1/2) = 1.96-TeV

    SciTech Connect

    Usynin, Denys

    2005-12-01

    The authors study the yields of charged kaons, charged pions, and protons produced in association with B mesons produced in proton-antiproton collisions at center of mass energy 1960 GeV using 355 pb{sup -1} of data collected with the CDF detector at the Fermilab Tevatron. This is the first reported measurements of these yields at a hadron collider. The B mesons are reconstructed using their semileptonic decays: B{sup 0} {yields} {ell}{sup +}D{sup -}X, D{sup -} {yields} K{sup +}{pi}{sup -}{pi}{sup -}; B{sup 0} {yields} {ell}{sup +}D*{sup -}X, D*{sup -} {yields} {pi}{sup -}{bar D}{sup 0},{bar D}{sup 0} {yields} K{sup +}{pi}{sup -}; B{sup +} {yields} {ell}{sup +}{bar D}{sup 0}X, {bar D}{sup 0} {yields} K{sup +}{pi}{sup -}; B{sub s}{yields}{ell}{sup +}D{sub s}{sup -}X, D{sub s}{sup -} {yields} {pi}{sup -}{phi},{phi} {yields} K{sup +}K{sup -}. The K, {pi}, and p are identified using the Time of Flight detector (TOF), the CDF spectrometer, and the specific ionization (dE/dx) measured in the central drift chamber (COT). The fraction of charged kaons produced in association with {bar B}{sub s}{sup 0} mesons is found to be larger than the fraction produced in association with the {bar B}{sup 0} and B{sup -} mesons, as expected from naive models of heavy quark hadronization to mesons. The particle species yields are found to be in qualitative agreement with simulation of B meson production in hadron collisions from the PYTHIA Monte Carlo, although the yield of kaons around {bar B}{sub s}{sup 0} mesons is found to be larger in the simulation when compared to the data. These studies are important for understanding methods of identifying the flavor of {bar B}{sub s}{sup 0} mesons in measurement of {bar B}{sub s}{sup 0} flavor oscillations and charge conjugation-parity (CP) violation in {bar B}{sub s}{sup 0} meson decays.

  15. Production and loss of H/sup -/ and D/sup -/ in the volume of a plasma

    SciTech Connect

    Hamilton, G.W.; Bacal, M.

    1981-07-01

    The study of the production and loss of negative ions, H/sup -/ and D/sup -/, in the volume of a plasma has received considerable attention since the measurement of anomalously high densities of H/sup -/ in 1977. The most probable mechanism for production is dissociative attachment (DA) to vibrationally highly-excited hydrogen molecules. New diagnostics developed for this purpose are photodetachment and the extension of coherent anti-Stokes Raman scattering (CARS) systems to the sensitivity required for low-pressure gases. Measurements and calculations indicate that the important loss mechanisms are diffusion to the walls at low densities and collisional destruction of several types at plasma densities above 10/sup 10/ cm/sup -3/. Production mechanisms must be highly efficient to compete with the losses. It appears to be straightforward to extrapolate measurements and theory to the densities above 10/sup 12/ cm/sup -3/ that are required for an intense source of D/sup -/ for neutral beam injection into magnetically-confined fusion devices.

  16. A novel particle time of flight diagnostic for measurements of shock- and compression-bang times in D{sup 3}He and DT implosions at the NIF

    SciTech Connect

    Rinderknecht, H. G.; Johnson, M. Gatu; Zylstra, A. B.; Sinenian, N.; Rosenberg, M. J.; Frenje, J. A.; Waugh, C. J.; Li, C. K.; Seguin, F. H.; Petrasso, R. D.; Rygg, J. R.; Kimbrough, J. R.; MacPhee, A.; Collins, G. W.; Hicks, D.; Mackinnon, A.; Bell, P.; Bionta, R.; Clancy, T.; Zacharias, R.; and others

    2012-10-15

    The particle-time-of-flight (pTOF) diagnostic, fielded alongside a wedge range-filter (WRF) proton spectrometer, will provide an absolute timing for the shock-burn weighted {rho}R measurements that will validate the modeling of implosion dynamics at the National Ignition Facility (NIF). In the first phase of the project, pTOF has recorded accurate bang times in cryogenic DT, DT exploding pusher, and D{sup 3}He implosions using DD or DT neutrons with an accuracy better than {+-}70 ps. In the second phase of the project, a deflecting magnet will be incorporated into the pTOF design for simultaneous measurements of shock- and compression-bang times in D{sup 3}He-filled surrogate implosions using D{sup 3}He protons and DD-neutrons, respectively.

  17. 26 CFR 1.453-1-1.453-2 - [Reserved

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 26 Internal Revenue 6 2013-04-01 2013-04-01 false 1.453-1-1.453-2 Section 1.453-1-1.453-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Taxable Year for Which Items of Gross Income Included §§ 1.453-11.453-2...

  18. 26 CFR 1.453-1-1.453-2 - [Reserved

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 26 Internal Revenue 6 2012-04-01 2012-04-01 false 1.453-1-1.453-2 Section 1.453-1-1.453-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Taxable Year for Which Items of Gross Income Included §§ 1.453-11.453-2...

  19. 26 CFR 1.453-1-1.453-2 - [Reserved

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 26 Internal Revenue 6 2014-04-01 2014-04-01 false 1.453-1-1.453-2 Section 1.453-1-1.453-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Taxable Year for Which Items of Gross Income Included §§ 1.453-11.453-2...

  20. 26 CFR 1.453-1-1.453-2 - [Reserved

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 6 2011-04-01 2011-04-01 false 1.453-1-1.453-2 Section 1.453-1-1.453-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Taxable Year for Which Items of Gross Income Included §§ 1.453-11.453-2...

  1. Radiative rates for E1, E2, M1, and M2 transitions in the Br-like ions Sr IV, Y V, Zr VI, Nb VII, and Mo VIII

    SciTech Connect

    Aggarwal, Kanti M. Keenan, Francis P.

    2015-09-15

    Energies and lifetimes are reported for the lowest 375 levels of five Br-like ions, namely Sr IV, Y V, Zr VI, Nb VII, and Mo VIII, mostly belonging to the 4s{sup 2}4p{sup 5}, 4s{sup 2}4p{sup 4}4ℓ, 4s4p{sup 6}, 4s{sup 2}4p{sup 4}5ℓ, 4s{sup 2}4p{sup 3}4d{sup 2}, 4s4p{sup 5}4ℓ, and 4s4p{sup 5}5ℓ configurations. Extensive configuration interaction has been included and the general-purpose relativistic atomic structure package (GRASP) has been adopted for the calculations. Additionally, radiative rates are listed among these levels for all E1, E2, M1, and M2 transitions. From a comparison with the measurements, the majority of our energy levels are assessed to be accurate to better than 2%, although discrepancies between theory and experiment for a few are up to 6%. An accuracy assessment of the calculated radiative rates (and lifetimes) is more difficult, because no prior results exist for these ions.

  2. 2.2.1 Ionizing Radiation

    NASA Astrophysics Data System (ADS)

    Kasch, K.-U.

    This document is part of Subvolume A 'Fundamentals and Data in Radiobiology, Radiation Biophysics, Dosimetry and Medical Radiological Protection' of Volume 7 'Medical Radiological Physics' of Landolt-Börnstein - Group VIII 'Advanced Materials and Technologies'. It contains the Subsection '2.2.1 Ionizing Radiation' of the Section '2.2 Kinds of Radiation' of the Chapter '2 Radiation and Biological Effects' with the contents:

  3. 1,1,2-Trichloro-1,2,2-trifluoroethane (CFC-113)

    Integrated Risk Information System (IRIS)

    1,1,2 - Trichloro - 1,2,2 - trifluoroethane ( CFC - 113 ) ; CASRN 76 - 13 - 1 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health

  4. Measurements of the B Production Cross Section in Proton-Antiproton Collisions at s**(1/2) = 1.96 TeV using semileptonic decays of b hadrons

    SciTech Connect

    Kraus, James Alexander; /Illinois U., Urbana

    2006-07-01

    The authors present a measurement of the cross section of b hadron (H{sub b}) production in p{bar p} collisions at {radical}s = 1.96 TeV using the CDF II detector at the Fermilab Tevatron. They use 83 pb{sup -1} of data taken between october 2002 and May 2003 that was collected with a trigger sensitive to high momentum muons and displaced tracks. They use partially reconstructed decays in the following modes: H{sub b} {yields} {mu}{sup -} {bar {nu}}{sub {mu}}D{sup 0}X, D{sup 0} {yields} K{sup -}{pi}{sup +}, and H{sub b} {yields} {mu}{sup -}{bar {nu}}{sub {mu}}D*{sup +} X, D*{sup +} {yields} D{sup 0}{pi}{sup +}, D{sup 0} {yields} K{sup -} {pi}{sup +}, and their charge conjugates. They correct for the backgrounds from c{bar c} and b{bar b} decays, for trigger and reconstruction efficiencies, and for detector acceptance. They report the total cross section above a minimum transverse momentum (p{sub T}) of 9 GeV/c for the rapidity range |y| {le} 0.6.

  5. The 5 f r arrow 6 d absorption spectrum of Pa sup 4+ /Cs sub 2 ZrCl sub 6

    SciTech Connect

    Edelstein, N.; Kot, W.K. ); Krupa, J. )

    1992-01-01

    The 5{ital f}{sup 1}{r arrow}6{ital d}{sup 1} absorption spectrum of {sup 231}Pa{sup 4+} diluted in a single crystal of Cs{sub 2}ZrCl{sub 6} has been measured at 4.2 K. Three bands corresponding to the 6{ital d}({Gamma}{sub 8{ital g}}, {Gamma}{sub 7{ital g}}, and {Gamma}{sup {prime}}{sub 8{ital g}} ) levels are assigned. Extensive vibronic structure has been observed for the lowest 5{ital f}{r arrow}6{ital d} transition and this structure is compared to that recently reported for the 6{ital d}{sup 1}{r arrow}5{ital f}{sup 1} emission spectra in the same system.

  6. Poly(1,4:2,2-butanetetrayl). A novel polyspirane via metallocenium-catalyzed ring-opening - zipping-up polymerization of methylenecyclopropane

    SciTech Connect

    Jia, L.; Yang, X.; Yang, S.; Marks, T.J.

    1996-02-14

    We wish to communicate here the delineation of a sequential metallocenium-catalyzed ring-opening - `zipping-up` Ziegler polymerization of methylenecyclopropane which yields, in high chemo- and stereoselectivity, a saturated polyspirane having structure B, poly(1,4:2,2-butanetetrayl), as well as some of the interesting structural and thermal properties of this new material. Polymerization of methylenecyclopropane catalyzed by (Me{sub 5}Cp){sub 2}ZrMe{sup +}MeB(C{sub 6}F{sub 5}){sub 3}{sup -} was carried out in dilute toluene solutions under rigorously anhydrous/anaerobic conditions. At temperatures from -10{degree}C to -30{degree}C, rapid and complete consumption of the monomer is observed by NMR using the monomer:catalyst ratios shown. Interestingly, at room temperature, the reaction pauses before monomer is completely consumed. That this loss of activity is not due to poisoning of the catalyst by adventitious impurities is confirmed by the observation that activity is completely restored on exposure to H{sub 2}. In summary, these results describe the synthesis of a new polyspirane via the chemo- and stereoselective ring-opening - zipping-up polymerization of methylenecyclopropane catalyzed by a cationic d{sup 0} zirconocenium catalyst. Efforts to obtain additional structural and mechanistic information are underway. 14 refs., 1 fig., 1 tab.

  7. [2+2+1] cyclization of allenes.

    PubMed

    Kitagaki, S; Inagaki, F; Mukai, C

    2014-05-01

    The [2+2+1] cyclization of an alkyne, an alkene and carbon monoxide, i.e., the Pauson-Khand reaction, is one of the most powerful tools for constructing a five-membered ring. In place of the alkene or alkyne part, the use of an allene functionality has proven to make this reaction more valuable for organic synthesis. This review focuses on the origin and progress of the allenic [2+2+1] cyclocarbonylation, including the chirality transfer of the allene and its synthetic applications. PMID:24514744

  8. Mercury coordination polymers with flexible ethane-1,2-diyl-bis-(pyridyl-3-carboxylate): Synthesis, structures, thermal and luminescent properties

    SciTech Connect

    Vallejos, Javier; Brito, Iván; Cárdenas, Alejandro; Llanos, Jaime; Bolte, Michael; López-Rodríguez, Matías

    2015-03-15

    The reaction of the flexible ligand, ethane-1,2-diyl-bis-(pyridyl-3-carboxylate), (L) with HgI{sub 2} and HgBr{sub 2} salts under the same experimental conditions leads to the formation of two coordination polymers with different motifs: ([Hg(L)(Br{sub 2})]){sub n}(1) and ([Hg(L)(I{sub 2})]){sub n}(2). In both compounds, the ligand, (L) acts in a μ2-N:N′-bidentate fashion to link HgBr{sub 2} and HgI{sub 2} units to form a linear and helical chain motif, along [1 0 0] for (1) and [0 0 1] for (2). The ethylene moiety of (L) has gauche and trans conformation in compounds (1) and (2), respectively. The flexible conformation of L produces differences in the optical and crystal properties of the two compounds. - Graphical abstract: This work demonstrates how the HgX{sub 2} units are coordinates by bi-dentate ligand forming polymeric coordination complexes by self-assembly of both chemical units.- Highlights: • News 1-D d{sup 10} transition metal coordination polymers. • The photoluminescent properties have been measured. • The thermal properties have been measured.

  9. Equilibria of 1,1,2,-trichloro-1,2,2-trifluoroethane on activated carbons

    SciTech Connect

    Cho, S.Y.; Lee, Y.Y.

    1995-07-01

    ChloroFluoroCarbons (CFCs) are now considered to be the prime contribution to stratospheric ozone depletion. As a result, the use of activated carbons to adsorb specific CFCs has received great attention. In this paper, the equilibrium adsorption characteristics of 1,1,2-trichloro-1,2,2-trifluoroethane vapor on different-shaped carbons were studied. Adsorption isotherms of 1,2,2-trichloro-1,2,2-trifluoroethane on an activated carbon pellet and an activated carbon felt were measured. The equilibria of 1,1,2-trichloro-1,2,2-trifluoroethane on the activated carbon pellet having a dual pore structure were expressed by the Redlich-Peterson equation, and equilibrium constants were expressed as functions of temperature from 298 to 393 K. On the other hand, the equilibria of 1,1,2-trichloro-1,2,2-trifluoroethane on the activated carbon felt having a relatively uniform pore structure were interpreted by the Dubinin-Radushkevich correlation based on the micropore volume filling theory. The affinity coefficient was correlated by the molar polarization.

  10. Observation of a Charmed Baryon Decaying to D0 p at a Mass Near 2.94 GeV/c2

    SciTech Connect

    Aubert, B.

    2006-03-29

    A search for charmed baryons decaying to D{sup 0}p reveals two states: the {Lambda}{sub c}(2880){sup +} baryon and a previously unobserved state at a mass of [2939.8 {+-} 1.3 (stat.) {+-} 1.0 (syst.)] MeV/c{sup 2} and with an intrinsic width of [17.5 {+-} 5.2 (stat.) {+-} 5.9 (syst.)] MeV. Consistent and significant signals are observed for the K{sup -}{pi}{sup +} and K{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup +} decay modes of the D{sup 0} in 287 fb{sup -1} annihilation data recorded by the BABAR detector at a center-of-mass energy of 10.58 GeV. There is no evidence in the D{sup +}p spectrum of doubly-charged partners. The mass and intrinsic width of the {Lambda}{sub c}(2880){sup +} baryon and relative yield of the two baryons are also measured.

  11. Defect engineered d{sup 0} ferromagnetism in tin-doped indium oxide nanostructures and nanocrystalline thin-films

    SciTech Connect

    Khan, Gobinda Gopal E-mail: sghoshphysics@gmail.com; Sarkar, Ayan; Ghosh, Shyamsundar E-mail: sghoshphysics@gmail.com; Mandal, Guruprasad; Mukherjee, Goutam Dev; Manju, Unnikrishnan; Banu, Nasrin; Dev, Bhupendra Nath

    2015-08-21

    Origin of unexpected defect engineered room-temperature ferromagnetism observed in tin-doped indium oxide (ITO) nanostructures (Nanowires, Nano-combs) and nanocrystalline thin films fabricated by pulsed laser deposition has been investigated. It is found that the ITO nanostructures prepared under argon environment exhibit strongest ferromagnetic signature as compared to that nanocrystalline thin films grown at oxygen. The evidence of singly ionized oxygen vacancy (V{sub 0}{sup +}) defects, obtained from various spectroscopic measurements, suggests that such V{sub 0}{sup +} defects are mainly responsible for the intrinsic ferromagnetic ordering. The exchange interaction of the defects provides extensive opportunity to tune the room-temperature d{sup 0} ferromagnetism and optical properties of ITOs.

  12. The 1,1,1-triaryl-2,2,2-trifluoroethanes and process for their synthesis

    NASA Technical Reports Server (NTRS)

    Kray, W. D.; Rosser, R. W. (Inventor)

    1981-01-01

    New 1,1,1-triaryl-2,2,2-trifluoroethanes in which the aryl radicals carry one or more substituents were prepared by condensation of trifluoroacetophenones with substituted phenyl compounds in the presence of catalytic quantities of trifluoromethylsulfonic acid. The reaction can be carried out under reflux in toluene or, for strikingly better results in certain cases, reactants are simply stirred at room temperature for about 24 to 48 hours.

  13. TOUGH V2.1

    2011-06-01

    TOUGH2 is a numerical simulator for nonisothermal flows of multicomponent, multiphase fluids in one-, two-, and three-dimensional porous and fracture media. The chief applications for which TOUGH2 is designed are in geothermal reservoir engineering, nuclear waste disposal, environmental assessment and remediation, geologic carbon sequestration, and unsaturated and saturated zone hydrology. The TOUGH2 V2.1 package is an upgrade of TOUGH2 V2.0 (CR-1574) and includes the following improvements and enhancements relative to TOUGH2 V2.0: - Includes allmore » known bug fixes - The module TMVOC (CR-1820) is fully integrated - The module ECO2N (CR-2202) is fully integrated - A fluid property module ECO2M has been added, that can seamlessly model CO2 storage and leakage scenarios, including transitions between super- and sub-critical fluids, and phase changes between liquid and gaseous CO2. The TOUGH2 V2.1 package also supports all legacy fluid property modules, i.e., those packaged into TOUGH2 V2.0 (CR-1574), which includes T2VOC (CR-1254).« less

  14. TOUGH V2.1

    SciTech Connect

    2011-06-01

    TOUGH2 is a numerical simulator for nonisothermal flows of multicomponent, multiphase fluids in one-, two-, and three-dimensional porous and fracture media. The chief applications for which TOUGH2 is designed are in geothermal reservoir engineering, nuclear waste disposal, environmental assessment and remediation, geologic carbon sequestration, and unsaturated and saturated zone hydrology. The TOUGH2 V2.1 package is an upgrade of TOUGH2 V2.0 (CR-1574) and includes the following improvements and enhancements relative to TOUGH2 V2.0: - Includes all known bug fixes - The module TMVOC (CR-1820) is fully integrated - The module ECO2N (CR-2202) is fully integrated - A fluid property module ECO2M has been added, that can seamlessly model CO2 storage and leakage scenarios, including transitions between super- and sub-critical fluids, and phase changes between liquid and gaseous CO2. The TOUGH2 V2.1 package also supports all legacy fluid property modules, i.e., those packaged into TOUGH2 V2.0 (CR-1574), which includes T2VOC (CR-1254).

  15. Space-resolved density diagnostic of a highly ionized holmium ([ital Z]=67) laser-produced plasma from 3[ital d][sup 10]4[ital l]-3[ital d][sup 10]4[ital l][prime] Cu I--like lines

    SciTech Connect

    Mandelbaum, P.; Behar, E. ); Seely, J.F.; Feldman, U.; Brown, C.M. ); Hammel, B.A.; Back, C.A.; Lee, R.W.; Kania, D.R. ); Bar-Shalom, A. )

    1994-06-01

    A space-resolved electron density diagnostic of a holmium laser-produced plasma has been performed using the intensity ratios of Cu I--like 3[ital d][sup 10]4[ital l]-3[ital d][sup 10]4[ital l][prime] lines. The atomic theoretical model of the Cu I--like ion included the 3[ital d][sup 10][ital nl] levels with [ital n]=4,5 and [ital l]=[ital s],[ital p],[ital d],[ital f]. The effect of line absorption at high electron densities is discussed and the atomic data obtained with the HULLAC computer code are compared with previously published data.

  16. Generation and characterization of 1,2-diaryl-1,1,2,2-tetramethyldisilane cation radicals.

    PubMed

    Guirado, Gonzalo; Haze, Olesya; Dinnocenzo, Joseph P

    2010-05-21

    Nanosecond laser flash photolysis methods were used to generate and spectrally characterize the cation radicals of 1,2-diaryl-1,1,2,2,-tetramethyldisilanes (Ar = p-X-Ph, X = H, CH(3), OCH(3)) in hexafluoroisopropanol (HFIP) at room temperature. The disilane cation radicals rapidly reacted with methanol, with bimolecular rate constants ranging from 0.63 to 2.1 x 10(8) M(-1) s(-1). The cation radicals were found to react with tert-butanol 4-5 times more slowly than methanol, consistent with a small steric effect for nucleophile-assisted fragmentation of the Si-Si bond. The standard potentials for oxidation of the disilanes in HFIP were determined by two different methods: first, by measuring equilibrium constants for electron exchange between the disilanes and the cation radical of hexaethylbenzene and, second, by combining electrochemical data from cyclic voltammetry with the lifetimes of the disilane cation radicals measured by laser flash photolysis in the same media. Agreement between the two methods was excellent (1,2-di-p-methoxyphenyl-1,1,2,2,-tetramethyldisilane by slow scan cyclic voltammetry in acetonitrile was not found to be reversible, in contrast to prior literature reports. Possible explanations for the prior results are proposed. PMID:20405871

  17. cis-1,2-Dichloroethylene

    Integrated Risk Information System (IRIS)

    cis - 1,2 - Dichloroethylene ; CASRN 156 - 59 - 2 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Nonc

  18. 1,2,4-Trichlorobenzene

    Integrated Risk Information System (IRIS)

    1,2,4 - Trichlorobenzene ; CASRN 120 - 82 - 1 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Noncarci

  19. Multipole (E1, M1, E2, M2, E3, M3) transition wavelengths and rates between 3l-15l' excited and ground states in nickel-like ions

    SciTech Connect

    Safronova, U I; Safronova, A S; Beiersdorfer, P

    2006-05-04

    A relativistic many-body method is developed to calculate energy and transition rates for multipole transitions in many-electron ions. This method is based on relativistic many-body perturbation theory (RMBPT), agrees with MCDF calculations in lowest-order, includes all second-order correlation corrections and includes corrections from negative energy states. Reduced matrix elements, oscillator strengths, and transition rates are calculated for electric-multipole (dipole (E1), quadrupole (E2), and octupole (E3)) and magnetic-multipole (dipole (M1), quadrupole (M2), and octupole (M3)) transitions between 3l{sup -1}5l{prime} excited and ground states in Ni-like ions with nuclear charges ranging from Z = 30 to 100. The calculations start from a 1s{sup 2}s{sup 2}2p{sup 6}3s{sup 2}3p{sup 6}3d{sup 10} Dirac-Fock potential. First-order perturbation theory is used to obtain intermediate-coupling coefficients, and second-order RMBPT is used to determine the matrix elements. A detailed discussion of the various contributions to the dipole matrix elements and energy levels is given for nickel-like tungsten (Z = 74). The contributions from negative-energy states are included in the second order E1, M1, E2, M2, E3 and M3 matrix elements. The resulting transition energies and transition rates are compared with experimental values and with results from other recent calculations. These atomic data are important in modeling of M-shell radiation spectra of heavy ions generated in electron beam ion trap experiments and in M-shell diagnostics of plasmas.

  20. ex1ex2v2 Version 2.10

    2007-09-12

    ex1ex2v2 is a translator program which will convert a database in exodus1 format to exodusII format. The exodus 1 format is a defined series of Fortran unformatted writes/reads; the exodusII format is defined by the ExodusII API.

  1. Demonstration of non-opioid sigma binding with (d)/sup 3/H-SKF 10047 in guinea pig brain

    SciTech Connect

    Mickelson, M.M.; Lahti, R.A.

    1985-02-01

    A non-opioid binding site to (d)/sup 3/H-SKF 10047 (N-allyl-normetazocine), the prototypic ligand for the sigma or PCP-like receptor, was demonstrated. The (d) isomer of /sup 3/H-SKF 10047 was used to demonstrate a stereospecific low affinity binding site with a K/sub d/ of 173nM. It was naloxone insensitive with an IC/sup 50/ of greater than 10,000nM, which defined it as non-opioid. Traditional mu compounds like morphine and FK 33824 were also inactive, with IC/sup 50/'s of greater than 10,000nM. Kappa compounds such as ethylketocyclazocine and U-50,488H were active as were all of the benzmorphans tested, with butorphanol the least active. The known antipsychotic haloperidol was the most active compound tested, with an IC/sup 50/ of 11nM. Other antipsychotics which demonstrated activity were chlorpromazine and pimozide. The atypical antipsychotic clozapine was inactive.

  2. Spectroscopy and isotope shifts of the 4s3d {sup 1}D{sub 2}-4s5p {sup 1}P{sub 1} repumping transition in magneto-optically trapped calcium atoms

    SciTech Connect

    Dammalapati, U.; Norris, I.; Burrows, C.; Arnold, A. S.; Riis, E.

    2010-02-15

    We investigate a repumping scheme for magneto-optically trapped calcium atoms. It is based on excitation of the 4s3d{sup 1}D{sub 2}-4s5p{sup 1}P{sub 1} transition at 672 nm with an extended cavity diode laser. The effect of the repumping is approximately a factor of three increase in trap lifetime and a doubling of the trapping efficiency from a Zeeman slowed thermal beam. Added to this, the 672-nm laser repumps atoms from an otherwise dark state to yield an overall increase in detected fluorescence signal from the magneto-optic trap (MOT) of more than an order of magnitude. Furthermore, we report isotope shift measurements of the 672-nm transition, for the first time, for four naturally occurring even isotopes. Using available charge radii data, the observed shifts, extending up to 4.3 GHz, display the expected linear dependence in a King plot analysis. The measured shifts are used to determine the isotope shifts of the remaining {sup 41,43,46}Ca isotopes. These might be of interest where less abundant isotopes are used enabling isotope selective repumping, resulting in enhanced trapping and detection efficiencies.

  3. Effect of Rasbha spin-orbit interaction on the ground state energy of a hydrogenic D{sup 0} complex in a Gaussian quantum dot

    SciTech Connect

    Boda, Aalu Kumar, D. Sanjeev; Chatterjee, Ashok; Mukhopadhyay, Soma

    2015-06-24

    The ground state energy of a hydrogenic D{sup 0} complex trapped in a three-dimensional GaAs quantum dot with Gaussian confinement is calculated variationally incorporating the effect of Rashba spin-orbit interaction. The results are obtained as a function of the quantum dot size and the Rashba spin-orbit interaction. The results show that the Rashba interaction reduces the ground state energy of the system.

  4. M2-F1 cockpit

    NASA Technical Reports Server (NTRS)

    1963-01-01

    This photo shows the cockpit configuration of the M2-F1 wingless lifting body. With a top speed of about 120 knots, the M2-F1 had a simple instrument panel. Besides the panel itself, the ribs of the wooden shell (left) and the control stick (center) are also visible. The wingless, lifting body aircraft design was initially conceived as a means of landing an aircraft horizontally after atmospheric reentry. The absence of wings would make the extreme heat of re-entry less damaging to the vehicle. In 1962, Dryden management approved a program to build a lightweight, unpowered lifting body as a prototype to flight test the wingless concept. It would look like a 'flying bathtub,' and was designated the M2-F1, the 'M' referring to 'manned' and 'F' referring to 'flight' version. It featured a plywood shell placed over a tubular steel frame crafted at Dryden. Construction was completed in 1963. The first flight tests of the M2-F1 were over Rogers Dry Lake at the end of a tow rope attached to a hopped-up Pontiac convertible driven at speeds up to about 120 mph. This vehicle needed to be able to tow the M2-F1 on the Rogers Dry Lakebed adjacent to NASA's Flight Research Center (FRC) at a minimum speed of 100 miles per hour. To do that, it had to handle the 400-pound pull of the M2-F1. Walter 'Whitey' Whiteside, who was a retired Air Force maintenance officer working in the FRC's Flight Operations Division, was a dirt-bike rider and hot-rodder. Together with Boyden 'Bud' Bearce in the Procurement and Supply Branch of the FRC, Whitey acquired a Pontiac Catalina convertible with the largest engine available. He took the car to Bill Straup's renowned hot-rod shop near Long Beach for modification. With a special gearbox and racing slicks, the Pontiac could tow the 1,000-pound M2-F1 110 miles per hour in 30 seconds. It proved adequate for the roughly 400 car tows that got the M2-F1 airborne to prove it could fly safely and to train pilots before they were towed behind a C-47

  5. RASCAL Version 2.1 workbook. Volume 2, Revision 2

    SciTech Connect

    Athey, G.F.; Sjoreen, A.L.; McKenna, T.J.

    1994-12-01

    The Radiological Assessment System for Consequence Analysis, Version 2.1 (RASCAL 2.1) was developed for use by the NRC personnel who respond to radiological emergencies. This workbook complements the RASCAL 2.1 User`s guide (NUREG/CR-5247, Vol. 1, Rev. 2). The workbook contains exercises designed to familiarize the user with the computer-based tools of RASCAL through hands-on problem solving. The workbook contains four major sections. The first is a RASCAL familiarization exercise to acquaint the user with the operation of the forms, menus, online help, and documentation. The latter three sections contain exercises in using the three tools of RASCAL Version 2.1: DECAY, FM-DOSE, and ST-DOSE. A discussion section describing how the tools could be used to solve the problems follows each set of exercises.

  6. 1,2,4-Tribromobenzene

    Integrated Risk Information System (IRIS)

    1,2,4 - Tribromobenzene ; CASRN 615 - 54 - 3 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Noncarcin

  7. 1,2,3-Trichloropropane

    Integrated Risk Information System (IRIS)

    1,2,3 - Trichloropropane ; CASRN 96 - 18 - 4 Human health assessment information on a chemical substance is included in IRIS only after a comprehensive review of toxicity data by U.S . EPA health scientists from several program offices , regional offices , and the Office of Research and Development

  8. trans-1,2-Dichloroethylene

    Integrated Risk Information System (IRIS)

    trans - 1,2 - Dichloroethylene ; CASRN 156 - 60 - 5 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for No

  9. 1,2-Epoxybutane (EBU)

    Integrated Risk Information System (IRIS)

    1,2 - Epoxybutane ( EBU ) ; CASRN 106 - 88 - 7 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Noncarc

  10. Search for b0(s) --> mu+ mu- and b0(d) --> mu+ mu- decays in p anti-p collisions at s**(1/2) = 1.96 tev

    SciTech Connect

    Acosta, D.; CDF Collaboration

    2004-03-20

    The authors report on a search for B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -} and B{sub d}{sup 0} {yields} {mu}{sup +}{mu}{sup -} decays in p{bar p} collisions at {radical}s = 1.96 TeV using 171 pb{sup -1} of data collected by the CDF II experiment at the Fermilab Tevatron Collider. The decay rates of these rare processes are sensitive to contributions from physics beyond the Standard Model. One event survives all the selection requirements, consistent with the background expectation. They derive branching ratio limits of {Beta}(B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -}) < 5.8 x 10{sup -7} and {Beta}(B{sub d}{sup 0} {yields} {mu}{sup +}{mu}{sup -}) < 1.5 x 10{sup -7} at 90% confidence level.

  11. (1S,2R,2'S)- and (1S,2S, 2'S)-1-phenyl-2-phenylthio-2-(tetrahydropyran-2'-ylthio)ethanol diastereoisomers at 193 K.

    PubMed

    Kansikas, J; Sipilä, K

    2000-11-01

    In the synthesis of 1-phenyl-2-phenylthio-2-(tetrahydropyran-2-ylthio)ethanol, C(19)H(22)O(2)S(2), four diastereoisomers are formed. Two non-centrosymmetric enantiomeric forms which crystallize in space groups P2(1)2(1)2(1) and Pna2(1) are presented. The former has an intramolecular hydrogen bond between the hydroxyl group and the O atom of the tetrahydropyran ring. In the latter isomer, the hydroxyl group forms an intermolecular hydrogen bond to the O atom of the tetrahydropyranyl group of a neighbouring molecule, joining the molecules into chains in the c-axis direction; the O.O distances are 2.962 (4) and 2.764 (3) A, respectively. The tetrahydropyran rings are in chair conformations in both isomers and the S side chain has an equatorial orientation in the former, but an axial orientation in the latter molecule. PMID:11077307

  12. Halogen-bonded adduct of 1,2-dibromo-1,1,2,2-tetrafluoroethane and 1,4-diazabicyclo[2.2.2]octane.

    PubMed

    Brisdon, Alan K; Muneer, Abeer M T; Pritchard, Robin G

    2015-10-01

    Halogen bonding is an intermolecular interaction capable of being used to direct extended structures. Typical halogen-bonding systems involve a noncovalent interaction between a Lewis base, such as an amine, as an acceptor and a halogen atom of a halofluorocarbon as a donor. Vapour-phase diffusion of 1,4-diazabicyclo[2.2.2]octane (DABCO) with 1,2-dibromotetrafluoroethane results in crystals of the 1:1 adduct, C2Br2F4·C6H12N2, which crystallizes as an infinite one-dimensional polymeric structure linked by intermolecular N...Br halogen bonds [2.829 (3) Å], which are 0.57 Å shorter than the sum of the van der Waals radii. PMID:26422219

  13. F(1) for B (forward) D*ln from lattice QCD

    SciTech Connect

    A.S. Kronfeld, P.B. Mackenzie and J.N. Simone

    2002-07-12

    The authors would like to determine |V{sub cb}| from the exclusive semi-leptonic decay B{yields}D*lv. The differential decay rate is d{Lambda}/dw = G{sub F}{sup 2}/4{pi}{sup 3}(w{sup 2}-1){sup 1/2}m{sub D*}{sup 3} (m{sub B}-m{sub D*}){sup 2}G(w)|V{sub cb}|{sup 2}|F{sub B{yields}D*}(w)|{sup 2}, where w = v {center_dot} v{prime} and G(1) = 1. At zero recoil (w = 1) heavy-quark symmetry requires F{sub B{yields}D*}(1) to be close to 1. So, |V{sub cb}| is determined by dividing measurements of d{Lambda}/dw by the phase space and well-known factors, and extrapolating to w {yields} 1. This yields |V{sub cb}|F{sub B{yields}D*}(1), and F{sub B{yields}D*}(1) is taken from ''theory''. To date models [1] or a combination of a rigorous inequality plus judgement [2] have been used to estimate F{sub B{yields}D*}(1) - 1. In this work [3] they calculate F{sub B{yields}D*}(1) with lattice gauge theory, in the so-called quenched approximation, but the uncertainty from quenching is included in the error budget.

  14. Orientational relaxations in solid (1,1,2,2)tetrachloroethane.

    PubMed

    Tripathi, P; Mitsari, E; Romanini, M; Serra, P; Tamarit, J Ll; Zuriaga, M; Macovez, R

    2016-04-28

    We employ dielectric spectroscopy and molecular dynamic simulations to investigate the dipolar dynamics in the orientationally disordered solid phase of (1,1,2,2)tetrachloroethane. Three distinct orientational dynamics are observed as separate dielectric loss features, all characterized by a simply activated temperature dependence. The slower process, associated to a glassy transition at 156 ± 1 K, corresponds to a cooperative motion by which each molecule rotates by 180° around the molecular symmetry axis through an intermediate state in which the symmetry axis is oriented roughly orthogonally to the initial and final states. Of the other two dipolar relaxations, the intermediate one is the Johari-Goldstein precursor relaxation of the cooperative dynamics, while the fastest process corresponds to an orientational fluctuation of single molecules into a higher-energy orientation. The Kirkwood correlation factor of the cooperative relaxation is of the order of one tenth, indicating that the molecular dipoles maintain on average a strong antiparallel alignment during their collective motion. These findings show that the combination of dielectric spectroscopy and molecular simulations allows studying in great detail the orientational dynamics in molecular solids. PMID:27131555

  15. 26 CFR 1.1-2 - Limitation on tax.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 1 2011-04-01 2009-04-01 true Limitation on tax. 1.1-2 Section 1.1-2 Internal... Surtaxes § 1.1-2 Limitation on tax. (a) Taxable years ending before January 1, 1971. For taxable years ending before January 1, 1971, the tax imposed by section 1 (whether by subsection (a) or subsection...

  16. SUPESv.4.1.2

    2001-04-25

    SUPES is a collection of subprograms that perform frequently used non-numerical services for the engineering applications programmer. The three functional categories of SUPES are: (1) input command parsing, (2) dynamic memory management, and (3) system dependent utilities. The subprograms in categories one and two are written in standard FORTRAN-77, while the subprograms in category three are written provide a standarized FORTRAN interface to several system dependent features.

  17. SWEET 2.1 Ontologies

    NASA Astrophysics Data System (ADS)

    Raskin, R. G.

    2010-12-01

    The Semantic Web for Earth and Environmental Terminology (SWEET) ontologies represent a mid- to upper-level concept space for all of Earth and Planetary Science and associated data and applications The latest version (2.1) has been reorganized to improve long-term maintainability. Accompanying the ontologies is a mapping to the CF Standard Name Table and the GCMD Science Keywords. As a higher level concept space, terms can be readily mapped across these vocabularies through the intermediate use of SWEET.

  18. Ignition in near term D-/sup 3/He tokamak reactors: Appendix B

    SciTech Connect

    Emmert, G.A.; Deng, B.Q.

    1987-01-01

    The prospects for achieving breakeven and ignition in near term ETR type tokamaks under D/He-3 relevant conditions are considered. Using present scaling laws for beta in the first stability regime, it is found that CIT may be close to breakeven with the presently planned toroidal magnetic field system, if the ASDEX H-mode scaling law is used. With Kaye-Goldston scaling, Q = .22 can be attained, but this requires an excessive amount of rf heating power. Larger devices, such as NET/INTOR, can ignite with ASDEX H-mode scaling with an increase of the toroidal field by 20% and removal of the blanket and reduction of the inboard shield to that required for D/He-3. 5 refs., 4 figs., 2 tabs.

  19. 40 CFR 721.10122 - 2-Propenoic acid, 2-methyl-, 1,1′-[2-ethyl-2-[[(2-methyl-1-oxo-2-propen-1-yl)oxy]methyl]- 1,3...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...- methyl]- 1,3-propanediyl] ester, polymer with 1,3-butadiene, ethenylbenzene and 2-hydroxyethyl 2-methyl-2..., polymer with 1,3-butadiene, ethenylbenzene and 2-hydroxyethyl 2-methyl-2-propenoate. (a) Chemical...-propenoic acid, 2-methyl-, 1,1′- methyl]- 1,3-propanediyl] ester, polymer with 1,3-butadiene,...

  20. 40 CFR 721.10122 - 2-Propenoic acid, 2-methyl-, 1,1′-[2-ethyl-2-[[(2-methyl-1-oxo-2-propen-1-yl)oxy]methyl]- 1,3...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...- methyl]- 1,3-propanediyl] ester, polymer with 1,3-butadiene, ethenylbenzene and 2-hydroxyethyl 2-methyl-2..., polymer with 1,3-butadiene, ethenylbenzene and 2-hydroxyethyl 2-methyl-2-propenoate. (a) Chemical...-propenoic acid, 2-methyl-, 1,1′- methyl]- 1,3-propanediyl] ester, polymer with 1,3-butadiene,...

  1. 40 CFR 721.10122 - 2-Propenoic acid, 2-methyl-, 1,1′-[2-ethyl-2-[[(2-methyl-1-oxo-2-propen-1-yl)oxy]methyl]- 1,3...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...- methyl]- 1,3-propanediyl] ester, polymer with 1,3-butadiene, ethenylbenzene and 2-hydroxyethyl 2-methyl-2..., polymer with 1,3-butadiene, ethenylbenzene and 2-hydroxyethyl 2-methyl-2-propenoate. (a) Chemical...-propenoic acid, 2-methyl-, 1,1′- methyl]- 1,3-propanediyl] ester, polymer with 1,3-butadiene,...

  2. 40 CFR 721.10122 - 2-Propenoic acid, 2-methyl-, 1,1′-[2-ethyl-2-[[(2-methyl-1-oxo-2-propen-1-yl)oxy]methyl]- 1,3...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...- methyl]- 1,3-propanediyl] ester, polymer with 1,3-butadiene, ethenylbenzene and 2-hydroxyethyl 2-methyl-2..., polymer with 1,3-butadiene, ethenylbenzene and 2-hydroxyethyl 2-methyl-2-propenoate. (a) Chemical...-propenoic acid, 2-methyl-, 1,1′- methyl]- 1,3-propanediyl] ester, polymer with 1,3-butadiene,...

  3. Crystalline 1H-1,2,3-triazol-5-ylidenes

    DOEpatents

    Bertrand, Guy; Gulsado-Barrios, Gregorio; Bouffard, Jean; Donnadieu, Bruno

    2016-08-02

    The present invention provides novel and stable crystalline 1H-1,2,3 triazolium carbenes and metal complexes of 1H-1,2,3 triazolium carbenes. The present invention also provides methods of making 1H-1,2,3 triazolium carbenes and metal complexes of 1H-1,2,3 triazolium carbenes. The present invention also provides methods of using 1H-1,2,3 triazolium carbenes and metal complexes of 1H-1,2,3 triazolium carbenes in catalytic reactions.

  4. Progress towards measuring the 2S1 / 2 to 2P1 / 2 interval in hydrogen

    NASA Astrophysics Data System (ADS)

    Vutha, A. C.; Bezginov, N.; Ferchichi, I.; Hessels, E. A.

    2015-05-01

    There is a large discrepancy between the CODATA value for the proton charge radius, and its determinations from muonic hydrogen measurements. This discrepancy is referred to as the proton radius puzzle. Improved measurements on atomic hydrogen can elucidate the origins of this discrepancy. We have constructed an experiment to measure the Lamb shift (n = 2 ,S1 / 2 -->P1 / 2) in a fast beam of atomic hydrogen. Using a novel separated-oscillatory-fields method and high signal-to-noise ratio detection, we can measure the center of this transition with a statistical uncertainty approaching 10-5 of its natural linewidth. We report on our studies of systematic effects, and on our progress towards a new measurement of the proton charge radius. We acknowledge funding from NSERC, CFI, CRC, ORF, and NIST.

  5. Triethyl-ammonium (indane-1,2,3-trione 1,2-dioximato-κ(2)N(1),O(2))(indane-1,2,3-trione 2-oximato 1-oxime-κ(2)N(1),O(2))nickel(II).

    PubMed

    Zhong, Baoyun; Li, Shengli; Chen, Guifang

    2012-04-01

    In the title compound, (C(6)H(16)N)[Ni(C(9)H(4)N(2)O(3))(C(9)H(5)N(2)O(3))], the Ni(II)ion is four-coordinated by two N atoms and two O atoms from two indane-1,2,3-trione-1,2-dioxime ligands. The two organic ligands are linked by an intra-molecular O-H⋯O hydrogen bond. In the crystal, mol-ecules are linked by N-H⋯O hydrogen-bonds. PMID:22589799

  6. Measurement of D>0 - $\\bar{D}$0 Mixing With a Time-Dependent Amplitude Analysis of D>0 → K+ π- π0

    SciTech Connect

    Pelliccioni, Mario

    2013-06-10

    Flavor mixing of neutral mesons is a long and well known phenomenon in particle physics. Experimental evidence of mixing of the neutral kaon was obtained in 1956, followed in 1987 by the evidence of Bd mixing. In 1974, A. Pais and S. B. Treiman firstly introduced the idea of charm mixing and CP violation. Even though many searches were conducted over time, it was clear that the small scale at which both amplitude and frequency of the oscillation took place made any possible observation challenging. In 2007, both the BABAR and Belle experiments announced the first evidence of mixing in the charm sector. The analyses concerned the study of a two body decay of the D>0 meson. Few months later, BABAR presented the analysis of the decay D>0 → K+π-π0 . This is the main topic of this thesis.

  7. Pressure effects on bimolecular reductive quenching of the platinum(II) dimer Pt sub 2 (. mu. -. eta. sup 2 -H sub 2 P sub 2 O sub 5 ) sub 4 sup 4 minus by organic substrates

    SciTech Connect

    Crane, D.R.; Ford, P.C. )

    1990-09-12

    Pressure effects are reported for the quenching dynamics of the lowest energy excited state of the d{sup 8}-d{sup 8} dimer Pt{sub 2}({mu}-{eta}{sup 2}-H{sub 2}P{sub 2}O{sub 5}){sub 4}{sup 4{minus}} ({sup 3}Pt{sub 2}*). Volumes of activation ({Delta}V{double dagger}) are reported for the H atom abstraction by {sup 3}Pt{sub 2}* from various organic substrates and for O{sub 2} quenching of {sup 3}Pt{sub 2}* in methanol solution. The H atom donors studied include a series of benzyl alcohols, allyl alcohol, tributyltin hydride, and benzyl methyl ether. Volumes of activation of {minus}5.4 {plus minus} 0.6 cm{sup 3} mol{sup {minus}1} and {minus}4.1 {plus minus} 0.7 cm{sup 3} mol{sup {minus}1} have been measured for quenching by benzyl alcohol and benzyl methyl ether, respectively. These negative {Delta}V{double dagger} values suggest as associative interaction between the excited state dimer and the H atom donor. The mechanistic implications of the pressure effects on the rates for other quenchers are discussed.

  8. 26 CFR 1.1-2 - Limitation on tax.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 1 2010-04-01 2010-04-01 true Limitation on tax. 1.1-2 Section 1.1-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY INCOME TAX INCOME TAXES Normal Taxes and Surtaxes § 1.1-2 Limitation on tax. (a) Taxable years ending before January 1, 1971. For taxable years ending before January 1, 1971, the tax...

  9. EnergyPlus 1.2.2

    2005-05-01

    EnergyPlus (E+) is a new whole-building energy analysis program that combines the best capabilities and features from BLAST and DOE-2 along with new capabilities. E+ modular implementation facilitates extending the program and adding links to other programs. The fluid loops and HVAC components support a "manager-interface" simulation protocol that allows for the independent simulation of subsystems, each possibly using a customized solution procedure. Thus, the E+ program structure allows the solution to a particular subsystemmore » to be computed without affecting the solution schemes used for the other subsystems. This fundamental requirement enables the integration of external models in the El+ building systems simulation.« less

  10. Product Branching Ratios of the Reaction of CO with H-3(+) and H2D+

    SciTech Connect

    Yu, H.G.

    2009-11-20

    The reaction of CO with H{sub 3}{sup +} and H{sub 2}D{sup +} has been studied to investigate thermal rate coefficients and product branching ratios in the temperature range [20, 350] K, by using a direct ab initio molecular dynamics method. In trajectory simulations, the energies and forces are calculated using a scaling all correlation second-order Moeller-Plesset perturbation theory (SAC-MP2) method with the correlation consistent polarized valence triplet-zeta basis (cc-pVTZ). Results show that total thermal rate coefficients for both the CO + H{sub 3}{sup +}and the CO + H{sub 2}D{sup +} reactions have a weakly positive temperature dependence. At room temperature, the rate coefficients are predicted to be (1.42 {+-} 0.03) x 10{sup -9} cm{sup 3} molecule{sup -1} s{sup -1} with a product branching ratio of [HOC{sup +}]/[HCO{sup +}] = 0.36 {+-} 0.01 for the CO + H{sub 3}{sup +} reaction, and (1.26 {+-} 0.03) x 10{sup -9} cm{sup 3} molecule{sup -1} s{sup -1} with the product branching ratios: 0.37 {+-} 0.01 (([HOC{sup +}] + [DOC{sup +}])/([HCO{sup +}] + [DOC{sup +}])), 0.54 {+-} 0.02 ([DCO{sup +}]/[HCO{sup +}]), and 0.49 {+-} 0.02 ([DOC{sup +}]/[HOC{sup +}]) for CO + H{sub 2}D{sup +}. The product branching ratios have a noticeable temperature dependence as well as a pronounced isotopic effect for the H/DOC{sup +} product channel.

  11. 26 CFR 1.117-2 - Limitations.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 2 2011-04-01 2011-04-01 false Limitations. 1.117-2 Section 1.117-2 Internal... TAXES (CONTINUED) Items Specifically Excluded from Gross Income § 1.117-2 Limitations. (a) Individuals who are candidates for degrees—(1) In general. Under the limitations provided by section 117(b)(1)...

  12. 26 CFR 1.117-2 - Limitations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 2 2010-04-01 2010-04-01 false Limitations. 1.117-2 Section 1.117-2 Internal... TAXES (CONTINUED) Items Specifically Excluded from Gross Income § 1.117-2 Limitations. (a) Individuals who are candidates for degrees—(1) In general. Under the limitations provided by section 117(b)(1)...

  13. Analytic cross sections for 1 1S, to 1 1S to 2 1S, 1 1S to 2 1P transitions in helium by electron impact

    NASA Technical Reports Server (NTRS)

    Sukumar, C. V.; Faisal, F. H. M.

    1971-01-01

    The 1 1s yields 1 1s elastic and 1 1s yields 2 1s and 1 1s yields 2 excitation cross sections of Helium atoms by collision with a charged particle are obtained as analytic functions of incident velocity. The first order time dependent scattering theory is used. Numerical values of electron -He cross sections are obtained for incident energies in the range 30 eV to 800 eV and compared with earlier Born approximation calculations and with available experimental data. It is found that at 100 eV and above, the present results are in good agreement with the experimental results. They are also closer to the experimental results than the corresponding Born calculations.

  14. 1 CFR 2.1 - Scope and purpose.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 1 General Provisions 1 2013-01-01 2012-01-01 true Scope and purpose. 2.1 Section 2.1 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER GENERAL GENERAL INFORMATION § 2.1 Scope and purpose. (a) This chapter sets forth the policies, procedures, and delegations under which...

  15. 1 CFR 2.1 - Scope and purpose.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 1 General Provisions 1 2011-01-01 2011-01-01 false Scope and purpose. 2.1 Section 2.1 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER GENERAL GENERAL INFORMATION § 2.1 Scope and purpose. (a) This chapter sets forth the policies, procedures, and delegations under which...

  16. 1 CFR 2.1 - Scope and purpose.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 1 General Provisions 1 2014-01-01 2012-01-01 true Scope and purpose. 2.1 Section 2.1 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER GENERAL GENERAL INFORMATION § 2.1 Scope and purpose. (a) This chapter sets forth the policies, procedures, and delegations under which...

  17. 1 CFR 2.1 - Scope and purpose.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 1 General Provisions 1 2012-01-01 2012-01-01 false Scope and purpose. 2.1 Section 2.1 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER GENERAL GENERAL INFORMATION § 2.1 Scope and purpose. (a) This chapter sets forth the policies, procedures, and delegations under which...

  18. 1 CFR 2.1 - Scope and purpose.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 1 General Provisions 1 2010-01-01 2010-01-01 false Scope and purpose. 2.1 Section 2.1 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER GENERAL GENERAL INFORMATION § 2.1 Scope and purpose. (a) This chapter sets forth the policies, procedures, and delegations under which...

  19. 7 CFR 1a.2 - Authorization.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 1 2010-01-01 2010-01-01 false Authorization. 1a.2 Section 1a.2 Agriculture Office of the Secretary of Agriculture LAW ENFORCEMENT AUTHORITIES § 1a.2 Authorization. Any official of the Office of Inspector General who is designated by the Inspector General according to §§ 1a.3 and 1a.5...

  20. Design of set-point weighting PI{sup λ} + D{sup μ} controller for vertical magnetic flux controller in Damavand tokamak

    SciTech Connect

    Rasouli, H.; Fatehi, A.

    2014-12-15

    In this paper, a simple method is presented for tuning weighted PI{sup λ} + D{sup μ} controller parameters based on the pole placement controller of pseudo-second-order fractional systems. One of the advantages of this controller is capability of reducing the disturbance effects and improving response to input, simultaneously. In the following sections, the performance of this controller is evaluated experimentally to control the vertical magnetic flux in Damavand tokamak. For this work, at first a fractional order model is identified using output-error technique in time domain. For various practical experiments, having desired time responses for magnetic flux in Damavand tokamak, is vital. To approach this, at first the desired closed loop reference models are obtained based on generalized characteristic ratio assignment method in fractional order systems. After that, for the identified model, a set-point weighting PI{sup λ} + D{sup μ} controller is designed and simulated. Finally, this controller is implemented on digital signal processor control system of the plant to fast/slow control of magnetic flux. The practical results show appropriate performance of this controller.

  1. Properties of L=1 B(1) and B(2)* mesons.

    PubMed

    Abazov, V M; Abbott, B; Abolins, M; Acharya, B S; Adams, M; Adams, T; Aguilo, E; Ahn, S H; Ahsan, M; Alexeev, G D; Alkhazov, G; Alton, A; Alverson, G; Alves, G A; Anastasoaie, M; Ancu, L S; Andeen, T; Anderson, S; Andrieu, B; Anzelc, M S; Arnoud, Y; Arov, M; Arthaud, M; Askew, A; Asman, B; Assis Jesus, A C S; Atramentov, O; Autermann, C; Avila, C; Ay, C; Badaud, F; Baden, A; Bagby, L; Baldin, B; Bandurin, D V; Banerjee, S; Banerjee, P; Barberis, E; Barfuss, A-F; Bargassa, P; Baringer, P; Barreto, J; Bartlett, J F; Bassler, U; Bauer, D; Beale, S; Bean, A; Begalli, M; Begel, M; Belanger-Champagne, C; Bellantoni, L; Bellavance, A; Benitez, J A; Beri, S B; Bernardi, G; Bernhard, R; Berntzon, L; Bertram, I; Besançon, M; Beuselinck, R; Bezzubov, V A; Bhat, P C; Bhatnagar, V; Biscarat, C; Blazey, G; Blekman, F; Blessing, S; Bloch, D; Bloom, K; Boehnlein, A; Boline, D; Bolton, T A; Borissov, G; Bos, K; Bose, T; Brandt, A; Brock, R; Brooijmans, G; Bross, A; Brown, D; Buchanan, N J; Buchholz, D; Buehler, M; Buescher, V; Burdin, S; Burke, S; Burnett, T H; Buszello, C P; Butler, J M; Calfayan, P; Calvet, S; Cammin, J; Caron, S; Carvalho, W; Casey, B C K; Cason, N M; Castilla-Valdez, H; Chakrabarti, S; Chakraborty, D; Chan, K M; Chan, K; Chandra, A; Charles, F; Cheu, E; Chevallier, F; Cho, D K; Choi, S; Choudhary, B; Christofek, L; Christoudias, T; Cihangir, S; Claes, D; Clément, C; Clément, B; Coadou, Y; Cooke, M; Cooper, W E; Corcoran, M; Couderc, F; Cousinou, M-C; Crépé-Renaudin, S; Cutts, D; Cwiok, M; da Motta, H; Das, A; Davies, G; De, K; de Jong, S J; de Jong, P; De La Cruz-Burelo, E; Martins, C De Oliveira; Degenhardt, J D; Déliot, F; Demarteau, M; Demina, R; Denisov, D; Denisov, S P; Desai, S; Diehl, H T; Diesburg, M; Dominguez, A; Dong, H; Dudko, L V; Duflot, L; Dugad, S R; Duggan, D; Duperrin, A; Dyer, J; Dyshkant, A; Eads, M; Edmunds, D; Ellison, J; Elvira, V D; Enari, Y; Eno, S; Ermolov, P; Evans, H; Evdokimov, A; Evdokimov, V N; Ferapontov, A V; Ferbel, T; Fiedler, F; Filthaut, F; Fisher, W; Fisk, H E; Ford, M; Fortner, M; Fox, H; Fu, S; Fuess, S; Gadfort, T; Galea, C F; Gallas, E; Galyaev, E; Garcia, C; Garcia-Bellido, A; Gavrilov, V; Gay, P; Geist, W; Gelé, D; Gerber, C E; Gershtein, Y; Gillberg, D; Ginther, G; Gollub, N; Gómez, B; Goussiou, A; Grannis, P D; Greenlee, H; Greenwood, Z D; Gregores, E M; Grenier, G; Gris, Ph; Grivaz, J-F; Grohsjean, A; Grünendahl, S; Grünewald, M W; Guo, J; Guo, F; Gutierrez, P; Gutierrez, G; Haas, A; Hadley, N J; Haefner, P; Hagopian, S; Haley, J; Hall, I; Hall, R E; Han, L; Hanagaki, K; Hansson, P; Harder, K; Harel, A; Harrington, R; Hauptman, J M; Hauser, R; Hays, J; Hebbeker, T; Hedin, D; Hegeman, J G; Heinmiller, J M; Heinson, A P; Heintz, U; Hensel, C; Herner, K; Hesketh, G; Hildreth, M D; Hirosky, R; Hobbs, J D; Hoeneisen, B; Hoeth, H; Hohlfeld, M; Hong, S J; Hooper, R; Hossain, S; Houben, P; Hu, Y; Hubacek, Z; Hynek, V; Iashvili, I; Illingworth, R; Ito, A S; Jabeen, S; Jaffré, M; Jain, S; Jakobs, K; Jarvis, C; Jesik, R; Johns, K; Johnson, C; Johnson, M; Jonckheere, A; Jonsson, P; Juste, A; Käfer, D; Kahn, S; Kajfasz, E; Kalinin, A M; Kalk, J R; Kalk, J M; Kappler, S; Karmanov, D; Kasper, J; Kasper, P; Katsanos, I; Kau, D; Kaur, R; Kaushik, V; Kehoe, R; Kermiche, S; Khalatyan, N; Khanov, A; Kharchilava, A; Kharzheev, Y M; Khatidze, D; Kim, H; Kim, T J; Kirby, M H; Kirsch, M; Klima, B; Kohli, J M; Konrath, J-P; Kopal, M; Korablev, V M; Kothari, B; Kozelov, A V; Krop, D; Kryemadhi, A; Kuhl, T; Kumar, A; Kunori, S; Kupco, A; Kurca, T; Kvita, J; Lacroix, F; Lam, D; Lammers, S; Landsberg, G; Lazoflores, J; Lebrun, P; Lee, W M; Leflat, A; Lehner, F; Lellouch, J; Lesne, V; Leveque, J; Lewis, P; Li, J; Li, Q Z; Li, L; Lietti, S M; Lima, J G R; Lincoln, D; Linnemann, J; Lipaev, V V; Lipton, R; Liu, Y; Liu, Z; Lobo, L; Lobodenko, A; Lokajicek, M; Lounis, A; Love, P; Lubatti, H J; Lyon, A L; Maciel, A K A; Mackin, D; Madaras, R J; Mättig, P; Magass, C; Magerkurth, A; Makovec, N; Mal, P K; Malbouisson, H B; Malik, S; Malyshev, V L; Mao, H S; Maravin, Y; Martin, B; McCarthy, R; Melnitchouk, A; Mendes, A; Mendoza, L; Mercadante, P G; Merkin, M; Merritt, K W; Meyer, J; Meyer, A; Michaut, M; Millet, T; Mitrevski, J; Molina, J; Mommsen, R K; Mondal, N K; Moore, R W; Moulik, T; Muanza, G S; Mulders, M; Mulhearn, M; Mundal, O; Mundim, L; Nagy, E; Naimuddin, M; Narain, M; Naumann, N A; Neal, H A; Negret, J P; Neustroev, P; Nilsen, H; Nomerotski, A; Novaes, S F; Nunnemann, T; O'Dell, V; O'Neil, D C; Obrant, G; Ochando, C; Onoprienko, D; Oshima, N; Osta, J; Otec, R; Y Garzón, G J Otero; Owen, M; Padley, P; Pangilinan, M; Parashar, N; Park, S-J; Park, S K; Parsons, J; Partridge, R; Parua, N; Patwa, A; Pawloski, G; Penning, B; Perea, P M; Peters, K; Peters, Y; Pétroff, P; Petteni, M; Piegaia, R; Piper, J; Pleier, M-A; Podesta-Lerma, P L M; Podstavkov, V M; Pogorelov, Y; Pol, M-E; Polozov, P; Pompos, A; Pope, B G; Popov, A V; Potter, C; da Silva, W L Prado; Prosper, H B; Protopopescu, S; Qian, J; Quadt, A; Quinn, B; Rakitine, A; Rangel, M S; Rani, K J; Ranjan, K; Ratoff, P N; Renkel, P; Reucroft, S; Rich, P; Rijssenbeek, M; Ripp-Baudot, I; Rizatdinova, F; Robinson, S; Rodrigues, R F; Royon, C; Rubinov, P; Ruchti, R; Safronov, G; Sajot, G; Sánchez-Hernández, A; Sanders, M P; Santoro, A; Savage, G; Sawyer, L; Scanlon, T; Schaile, D; Schamberger, R D; Scheglov, Y; Schellman, H; Schieferdecker, P; Schliephake, T; Schmitt, C; Schwanenberger, C; Schwartzman, A; Schwienhorst, R; Sekaric, J; Sengupta, S; Severini, H; Shabalina, E; Shamim, M; Shary, V; Shchukin, A A; Shivpuri, R K; Shpakov, D; Siccardi, V; Simak, V; Sirotenko, V; Skubic, P; Slattery, P; Smirnov, D; Smith, R P; Snow, J; Snow, G R; Snyder, S; Söldner-Rembold, S; Sonnenschein, L; Sopczak, A; Sosebee, M; Soustruznik, K; Souza, M; Spurlock, B; Stark, J; Steele, J; Stolin, V; Stone, A; Stoyanova, D A; Strandberg, J; Strandberg, S; Strang, M A; Strauss, M; Strauss, E; Ströhmer, R; Strom, D; Strovink, M; Stutte, L; Sumowidagdo, S; Svoisky, P; Sznajder, A; Talby, M; Tamburello, P; Tanasijczuk, A; Taylor, W; Telford, P; Temple, J; Tiller, B; Tissandier, F; Titov, M; Tokmenin, V V; Tomoto, M; Toole, T; Torchiani, I; Trefzger, T; Tsybychev, D; Tuchming, B; Tully, C; Tuts, P M; Unalan, R; Uvarov, S; Uvarov, L; Uzunyan, S; Vachon, B; van den Berg, P J; van Eijk, B; Van Kooten, R; van Leeuwen, W M; Varelas, N; Varnes, E W; Vartapetian, A; Vasilyev, I A; Vaupel, M; Verdier, P; Vertogradov, L S; Verzocchi, M; Villeneuve-Seguier, F; Vint, P; Vokac, P; Von Toerne, E; Voutilainen, M; Vreeswijk, M; Wagner, R; Wahl, H D; Wang, L; Wang, M H L S; Warchol, J; Watts, G; Wayne, M; Weber, M; Weber, G; Weerts, H; Wenger, A; Wermes, N; Wetstein, M; White, A; Wicke, D; Wilson, G W; Williams, M R J; Wimpenny, S J; Wobisch, M; Wood, D R; Wyatt, T R; Xie, Y; Yacoob, S; Yamada, R; Yan, M; Yasuda, T; Yatsunenko, Y A; Yip, K; Yoo, H D; Youn, S W; Yu, J; Yu, C; Yurkewicz, A; Zatserklyaniy, A; Zeitnitz, C; Zhang, D; Zhao, T; Zhou, B; Zhu, J; Zielinski, M; Zieminska, D; Zieminski, A; Zivkovic, L; Zutshi, V; Zverev, E G

    2007-10-26

    This Letter presents the first strong evidence for the resolution of the excited B mesons B(1) and B(2)* as two separate states in fully reconstructed decays to B(+)(*)pi(-). The mass of B(1) is measured to be 5720.6+/-2.4+/-1.4 MeV/c(2) and the mass difference DeltaM between B(2)* and B(1) is 26.2+/-3.1+/-0.9 MeV/c;{2}, giving the mass of the B(2)* as 5746.8+/-2.4+/-1.7 MeV/c(2). The production rate for B(1) and B(2)* mesons is determined to be a fraction (13.9+/-1.9+/-3.2)% of the production rate of the B+ meson. PMID:17995320

  2. 26 CFR 1.121-2 - Limitations.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 2 2011-04-01 2011-04-01 false Limitations. 1.121-2 Section 1.121-2 Internal... TAXES (CONTINUED) Items Specifically Excluded from Gross Income § 1.121-2 Limitations. (a) Dollar limitations—(1) In general. A taxpayer may exclude from gross income up to $250,000 of gain from the sale...

  3. 26 CFR 1.121-2 - Limitations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 2 2010-04-01 2010-04-01 false Limitations. 1.121-2 Section 1.121-2 Internal... TAXES (CONTINUED) Items Specifically Excluded from Gross Income § 1.121-2 Limitations. (a) Dollar limitations—(1) In general. A taxpayer may exclude from gross income up to $250,000 of gain from the sale...

  4. 26 CFR 1.169-2 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 2 2010-04-01 2010-04-01 false Definitions. 1.169-2 Section 1.169-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Itemized Deductions for Individuals and Corporations § 1.169-2 Definitions. (a) Certified pollution control facility—(1) In...

  5. 2. INTAKE CHANNEL LOOKING NORTHWEST; GATES 1, 2, AND 3 ...

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

    2. INTAKE CHANNEL LOOKING NORTHWEST; GATES 1, 2, AND 3 SHOWING. - Hondius Water Line, 1.6 miles Northwest of Park headquarters building & 1 mile Northwest of Beaver Meadows entrance station, Estes Park, Larimer County, CO

  6. Synthesis and chemistry of cationic d{sup 0} metal alkyl complexes. Progress report, July 1988--May 1991

    SciTech Connect

    Jordan, R.F.

    1991-12-31

    The objective of this project is to develop new types of electrophilic metal alkyl complexes for catalytic C-H activation and olefin polymerization chemistry, and associated fundamental mechanistic studies. We have focused our efforts on four classes of early metal alkyl complexes: (1) cationic group 4 Cp{sub 2}M(R){sup +} complexes (1) which are active species in Cp{sub 2}MX{sub 2}-based Ziegler-Natta olefin polymerization catalyst systems and which catalyze productive C-H activation reactions of heterocycles, (2) neutral (dicarbollide)(Cp*)M(R) complexes (2) which are structurally are electronically very similar to 1, (3) half-sandwich complexes CpM(R){sub 2}(L){sub n}{sup +} which are highly coordinatively and electronically unsaturated, and (4) new group 5 (dicarbollide)(Cp)MR{sub 2} and (dicarbollide){sub 2} MR complexes which are more unsaturated than group 5 Cp{sub 2}M systems due to incorporation of the dicarbollide ligand.

  7. 26 CFR 1.861-2 - Interest.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... applicable to taxable years beginning before January 1, 1967, (see 26 CFR part 1 revised April 1, 1971... 26 Internal Revenue 9 2011-04-01 2011-04-01 false Interest. 1.861-2 Section 1.861-2 Internal... Interest. (a) In general. (1) Gross income consisting of interest from the United States or any agency...

  8. Side Elevation, End Elevation, Cross Section, 1/2 Roof Plan, 1/2 ...

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

    Side Elevation, End Elevation, Cross Section, 1/2 Roof Plan, 1/2 Reflected Plan, 1/2 Floor Plan, 1/2 Reflected Plan - Jack's Mill Covered Bridge, Spanning Henderson Creek, Oquawka, Henderson County, IL

  9. Structure of {sup 7}He by proton removal from {sup 8}Li with the (d,{sup 3}He) reaction.

    SciTech Connect

    Wuosmaa, A. H.; Schiffer, J. P.; Rehm, K. E.; Greene, J. P.; Henderson, D. J.; Janssens, R. V. F.; Jiang, C. L.; Jisonna, L.; Lighthall, J. C.; Marley, S. T.; Moore, E. F.; Pardo, R. C.; Patel, N.; Paul, M.; Peterson, D.; Pieper, S. C.; Savard, G.; Segel, R. E.; Siemssen, R. H.; Tang, X. D.; Wiringa, R. B.; Physics; Western Michigan Univ.; Northwestern Univ.; Colorado School of Mines; Hebrew Univ.; Kernfysich Versneller Inst.

    2008-01-01

    We report on a study of the structure of the unbound nucleus {sup 7}He utilizing the proton-removal reaction {sup 2}H({sup 8}Li,{sup 3}He){sup 7}He. Combining the present results with those of our prior measurements of the neutron-adding reaction {sup 2}H({sup 6}He,p){sup 7}He, a consistent picture emerges for the low-lying excitations in {sup 7}He. Specifically, the negative-parity sequence of resonances, in order of excitation energies, is consistent with 3/2{sup -},1/2{sup -}, and 5/2{sup -}. The stable-beam reactions {sup 2}H({sup 7}Li,t){sup 6}Li and {sup 2}H({sup 7}Li,{sup 3}He){sup 6}He were also measured. The results are compared with the predictions of nuclear structure models, including those of ab initio quantum Monte Carlo calculations.

  10. Structure of {sup 7}He by proton removal from {sup 8}Li with the (d,{sup 3}He) reaction

    SciTech Connect

    Wuosmaa, A. H.; Lighthall, J. C.; Marley, S. T.; Schiffer, J. P.; Rehm, K. E.; Greene, J. P.; Henderson, D. J.; Janssens, R. V. F.; Jiang, C. L.; Moore, E. F.; Pardo, R. C.; Peterson, D.; Pieper, Steven C.; Savard, G.; Tang, X. D.; Wiringa, R. B.; Jisonna, L.; Segel, R. E.; Patel, N.; Paul, M.

    2008-10-15

    We report on a study of the structure of the unbound nucleus {sup 7}He utilizing the proton-removal reaction {sup 2}H({sup 8}Li,{sup 3}He){sup 7}He. Combining the present results with those of our prior measurements of the neutron-adding reaction {sup 2}H({sup 6}He,p){sup 7}He, a consistent picture emerges for the low-lying excitations in {sup 7}He. Specifically, the negative-parity sequence of resonances, in order of excitation energies, is consistent with 3/2{sup -},1/2{sup -}, and 5/2{sup -}. The stable-beam reactions {sup 2}H({sup 7}Li,t){sup 6}Li and {sup 2}H({sup 7}Li,{sup 3}He){sup 6}He were also measured. The results are compared with the predictions of nuclear structure models, including those of ab initio quantum Monte Carlo calculations.

  11. Synthetic utilization of 2-chloro-1,1,1,2-tetrafluoroethane.

    PubMed

    Notsu, Keiji; Zushi, Yasuyuki; Ota, Shin; Kawasaki-Takasuka, Tomoko; Yamazaki, Takashi

    2011-08-01

    β-Substituted α-fluoro-α,β-unsaturated carboxylic acids have been successfully synthesized, usually in a (Z)-stereospecific manner by way of a stepwise or a one-pot three-step procedure starting from 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124), one of the major byproducts of the industrial process for tetrafluoroethene formation from chlorofluoromethane (HCFC-22). PMID:21732447

  12. MOSS2D V1

    2001-01-31

    This software reduces the data from two-dimensional kSA MOS program, k-Space Associates, Ann Arbor, MI. Initial MOS data is recorded without headers in 38 columns, with one row of data per acquisition per lase beam tracked. The final MOSS 2d data file is reduced, graphed, and saved in a tab-delimited column format with headers that can be plotted in any graphing software.

  13. C2H2F4 1,1,1,2-Tetrafluoroethane

    NASA Astrophysics Data System (ADS)

    Demaison, J.

    This document is part of Part 1 of Subvolume D 'Asymmetric Top Molecules' of Volume 29 'Molecular Constants Mostly from Microwave, Molecular Beam, and Sub-Doppler Laser Spectroscopy' of Landolt-Börnstein - Group II 'Molecules and Radicals'.

  14. 43 CFR 2812.1-2 - Contents.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 43 Public Lands: Interior 2 2014-10-01 2014-10-01 false Contents. 2812.1-2 Section 2812.1-2 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT... Bay Revested Lands § 2812.1-2 Contents. (a) An individual applicant and each member of...

  15. 43 CFR 2812.1-2 - Contents.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 43 Public Lands: Interior 2 2013-10-01 2013-10-01 false Contents. 2812.1-2 Section 2812.1-2 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT... Bay Revested Lands § 2812.1-2 Contents. (a) An individual applicant and each member of...

  16. 43 CFR 2812.1-2 - Contents.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 43 Public Lands: Interior 2 2011-10-01 2011-10-01 false Contents. 2812.1-2 Section 2812.1-2 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT... Bay Revested Lands § 2812.1-2 Contents. (a) An individual applicant and each member of...

  17. 43 CFR 2812.1-2 - Contents.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 43 Public Lands: Interior 2 2012-10-01 2012-10-01 false Contents. 2812.1-2 Section 2812.1-2 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT... Bay Revested Lands § 2812.1-2 Contents. (a) An individual applicant and each member of...

  18. 43 CFR 2812.1-2 - Contents.

    Code of Federal Regulations, 2011 CFR

    2008-10-01

    ... 43 Public Lands: Interior 2 2008-10-01 2008-10-01 false Contents. 2812.1-2 Section 2812.1-2 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT.... and Coos Bay Revested Lands § 2812.1-2 Contents. (a) An individual applicant and each member of...

  19. 43 CFR 2812.1-2 - Contents.

    Code of Federal Regulations, 2011 CFR

    1996-10-01

    ... 43 Public Lands: Interior 2 1996-10-01 1996-10-01 false Contents. 2812.1-2 Section 2812.1-2 LAND RESOURCE MANAGEMENT (2000) TRAMROADS AND LOGGING ROADS Over O. and C. and Coos Bay Revested Lands § 2812.1-2 Contents. (a) An individual applicant and each member of any unincorporated association which...

  20. 43 CFR 2812.1-2 - Contents.

    Code of Federal Regulations, 2010 CFR

    2000-10-01

    ... 43 Public Lands: Interior 2 2000-10-01 2000-10-01 false Contents. 2812.1-2 Section 2812.1-2 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT,DEPARTMENT OF... Revested Lands § 2812.1-2 Contents. (a) An individual applicant and each member of any...

  1. 43 CFR 2812.1-2 - Contents.

    Code of Federal Regulations, 2011 CFR

    2002-10-01

    ... 43 Public Lands: Interior 2 2002-10-01 2002-10-01 false Contents. 2812.1-2 Section 2812.1-2 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT... Bay Revested Lands § 2812.1-2 Contents. (a) An individual applicant and each member of...

  2. 43 CFR 2812.1-2 - Contents.

    Code of Federal Regulations, 2013 CFR

    2006-10-01

    ... 43 Public Lands: Interior 2 2006-10-01 2006-10-01 false Contents. 2812.1-2 Section 2812.1-2 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT... Bay Revested Lands § 2812.1-2 Contents. (a) An individual applicant and each member of...

  3. 43 CFR 2812.1-2 - Contents.

    Code of Federal Regulations, 2012 CFR

    1997-10-01

    ... 43 Public Lands: Interior 2 1997-10-01 1997-10-01 false Contents. 2812.1-2 Section 2812.1-2 LAND RESOURCE MANAGEMENT (2000) TRAMROADS AND LOGGING ROADS Over O. and C. and Coos Bay Revested Lands § 2812.1-2 Contents. (a) An individual applicant and each member of any unincorporated association which...

  4. 43 CFR 2916.2-1 - Applications.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 43 Public Lands: Interior 2 2011-10-01 2011-10-01 false Applications. 2916.2-1 Section 2916.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR LAND RESOURCE MANAGEMENT (2000) LEASES Alaska Fur Farm § 2916.2-1 Applications. (a) Qualifications of applicants. Any...

  5. 43 CFR 8365.2-1 - Sanitation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 43 Public Lands: Interior 2 2013-10-01 2013-10-01 false Sanitation. 8365.2-1 Section 8365.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR RECREATION PROGRAMS VISITOR SERVICES Rules of Conduct § 8365.2-1 Sanitation....

  6. 43 CFR 8365.2-1 - Sanitation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 43 Public Lands: Interior 2 2011-10-01 2011-10-01 false Sanitation. 8365.2-1 Section 8365.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR RECREATION PROGRAMS VISITOR SERVICES Rules of Conduct § 8365.2-1 Sanitation....

  7. 26 CFR 1.565-2 - Limitations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 7 2010-04-01 2010-04-01 true Limitations. 1.565-2 Section 1.565-2 Internal... TAXES (CONTINUED) Deduction for Dividends Paid § 1.565-2 Limitations. (a) General rule. Amounts... of the actual distributions and the consent distributions. (c) Section 316 Limitation. (1)...

  8. 16 CFR 1.2 - Procedure.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 16 Commercial Practices 1 2012-01-01 2012-01-01 false Procedure. 1.2 Section 1.2 Commercial Practices FEDERAL TRADE COMMISSION ORGANIZATION, PROCEDURES AND RULES OF PRACTICE GENERAL PROCEDURES Industry Guidance Advisory Opinions § 1.2 Procedure. (a) Application. The request for advice...

  9. 18 CFR 1b.2 - Scope.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 18 Conservation of Power and Water Resources 1 2010-04-01 2010-04-01 false Scope. 1b.2 Section 1b.2 Conservation of Power and Water Resources FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY GENERAL RULES RULES RELATING TO INVESTIGATIONS § 1b.2 Scope. This part applies to...

  10. 7 CFR 1b.2 - Policy.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 1 2012-01-01 2012-01-01 false Policy. 1b.2 Section 1b.2 Agriculture Office of the Secretary of Agriculture NATIONAL ENVIRONMENTAL POLICY ACT § 1b.2 Policy. (a) All policies and programs of the various USDA agencies shall be planned, developed, and implemented so as to achieve the goals...

  11. 7 CFR 1b.2 - Policy.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 1 2011-01-01 2011-01-01 false Policy. 1b.2 Section 1b.2 Agriculture Office of the Secretary of Agriculture NATIONAL ENVIRONMENTAL POLICY ACT § 1b.2 Policy. (a) All policies and programs of the various USDA agencies shall be planned, developed, and implemented so as to achieve the goals...

  12. 7 CFR 1.2 - Policy.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 1 2011-01-01 2011-01-01 false Policy. 1.2 Section 1.2 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Official Records § 1.2 Policy. (a) Agencies of USDA shall comply with the time limits set forth in the FOIA and in this subpart for responding to...

  13. 7 CFR 1b.2 - Policy.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 1 2010-01-01 2010-01-01 false Policy. 1b.2 Section 1b.2 Agriculture Office of the Secretary of Agriculture NATIONAL ENVIRONMENTAL POLICY ACT § 1b.2 Policy. (a) All policies and programs of the various USDA agencies shall be planned, developed, and implemented so as to achieve the goals...

  14. 7 CFR 1.2 - Policy.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 1 2014-01-01 2014-01-01 false Policy. 1.2 Section 1.2 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Official Records § 1.2 Policy. (a) Agencies of USDA shall comply with the time limits set forth in the FOIA and in this subpart for responding to...

  15. 7 CFR 1.2 - Policy.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 1 2012-01-01 2012-01-01 false Policy. 1.2 Section 1.2 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Official Records § 1.2 Policy. (a) Agencies of USDA shall comply with the time limits set forth in the FOIA and in this subpart for responding to...

  16. 7 CFR 1b.2 - Policy.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 1 2014-01-01 2014-01-01 false Policy. 1b.2 Section 1b.2 Agriculture Office of the Secretary of Agriculture NATIONAL ENVIRONMENTAL POLICY ACT § 1b.2 Policy. (a) All policies and programs of the various USDA agencies shall be planned, developed, and implemented so as to achieve the goals...

  17. 11 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 11 Federal Elections 1 2010-01-01 2010-01-01 false Definitions. 1.2 Section 1.2 Federal Elections FEDERAL ELECTION COMMISSION PRIVACY ACT § 1.2 Definitions. As defined in the Privacy Act of 1974 and for the purposes of this part, unless otherwise required by the context, the following terms shall have these meanings: Act means the...

  18. 26 CFR 1.341-2 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 4 2011-04-01 2011-04-01 false Definitions. 1.341-2 Section 1.341-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES Collapsible Corporations; Foreign Personal Holding Companies § 1.341-2 Definitions. (a) Determination of collapsible corporation. (1)...

  19. 7 CFR 1.2 - Policy.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 1 2010-01-01 2010-01-01 false Policy. 1.2 Section 1.2 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Official Records § 1.2 Policy. (a) Agencies of USDA shall comply with the time limits set forth in the FOIA and in this subpart for responding to...

  20. 7 CFR 1.2 - Policy.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 1 2013-01-01 2013-01-01 false Policy. 1.2 Section 1.2 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Official Records § 1.2 Policy. (a) Agencies of USDA shall comply with the time limits set forth in the FOIA and in this subpart for responding to...

  1. 16 CFR 1.2 - Procedure.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 16 Commercial Practices 1 2013-01-01 2013-01-01 false Procedure. 1.2 Section 1.2 Commercial Practices FEDERAL TRADE COMMISSION ORGANIZATION, PROCEDURES AND RULES OF PRACTICE GENERAL PROCEDURES Industry Guidance Advisory Opinions § 1.2 Procedure. (a) Application. The request for advice...

  2. 16 CFR 1.2 - Procedure.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 16 Commercial Practices 1 2011-01-01 2011-01-01 false Procedure. 1.2 Section 1.2 Commercial Practices FEDERAL TRADE COMMISSION ORGANIZATION, PROCEDURES AND RULES OF PRACTICE GENERAL PROCEDURES Industry Guidance Advisory Opinions § 1.2 Procedure. (a) Application. The request for advice...

  3. 16 CFR 1.2 - Procedure.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 16 Commercial Practices 1 2010-01-01 2010-01-01 false Procedure. 1.2 Section 1.2 Commercial Practices FEDERAL TRADE COMMISSION ORGANIZATION, PROCEDURES AND RULES OF PRACTICE GENERAL PROCEDURES Industry Guidance Advisory Opinions § 1.2 Procedure. (a) Application. The request for advice...

  4. 16 CFR 1.2 - Procedure.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 16 Commercial Practices 1 2014-01-01 2014-01-01 false Procedure. 1.2 Section 1.2 Commercial Practices FEDERAL TRADE COMMISSION ORGANIZATION, PROCEDURES AND RULES OF PRACTICE GENERAL PROCEDURES Industry Guidance Advisory Opinions § 1.2 Procedure. (a) Application. The request for advice...

  5. 40 CFR 721.10122 - 2-Propenoic acid, 2-methyl-, 1,1′-[2-ethyl-2-[[(2-methyl-1-oxo-2-propen-1-yl)oxy]methyl]- 1,3...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 31 2014-07-01 2014-07-01 false 2-Propenoic acid, 2-methyl-, 1,1â²- methyl]- 1,3-propanediyl] ester, polymer with 1,3-butadiene, ethenylbenzene and 2-hydroxyethyl 2-methyl-2-propenoate. 721.10122 Section 721.10122 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) TOXIC SUBSTANCES CONTROL...

  6. Bubble point pressures for chlorodifluoromethane + 1,2-dichloro-1,1,2,2-tetrafluoroethane, bromotrifluoromethane + 1,2-dichloro-1,1,2,2-tetrafluoroethane, and bromotrifluoromethane + chloropentafluoroethane

    SciTech Connect

    Mishima, Kenji, Hongo, Masaru; Takagi, Toshiharu; Arai, Yasuhiko . Dept. of Industrial Chemistry)

    1993-01-01

    The bubble point pressures for chlorodifluoromethane (R22) + 1,2-dichloro-1,1,2,2-tetrafluoroethane (R114), bromotrifluoromethane (R13B1) + 1,2-dichloro-1,1,2,2-tetrafluoroethane (R114), and bromotrifluoromethane (R13B1) + chloropentafluoroethane (R115) were measured by a static method. Measurements were made at various compositions at temperatures from 298.15 K to near their critical temperature. The uncertainty of the pressures was estimated to be no greater than [plus minus]0.3%. The bubble point pressures for pure substances were correlated by the Wagner equation, and those for the mixtures were also correlated by the Wagner equation, using a corresponding states principle.

  7. 1-vinyl-4-alkyl-1,2,4-triazolium salts

    SciTech Connect

    Ermakova, T.G.; Chipanina, N.N.; Gritza, A.I.; Kuznetsova, N.P.; Lopyrev, V.A.; Tatarova, L.A.

    1985-04-01

    Quaternary salts based on 1-vinyl-1,2,4-triazole have been synthesized. Alkyl iodides and bromides and dimethyl sulfate served as the quaternizing agent. Polymeric quaternary salts of 1-vinyl-1,2,4-triazole have been obtained by alkylation of its polymer.

  8. Precision polarizability measurements of atomic cesium's 8 s 2S1 / 2 and 9 s 2S1 / 2 states

    NASA Astrophysics Data System (ADS)

    Weaver, Hannah; Kortyna, Andrew

    2013-05-01

    We report hyperfine-resolved scalar polarizabilities for cesium's 8 s 2S1 / 2 and 9 s 2S1 / 2 states using resonant two-photon spectroscopy. Two single-mode, external-cavity diode lasers drive the 6 s 2S1 / 2 --> 6 p 2P1 / 2 --> ns 2S1 / 2 transition (n = 8 or 9). Both laser beams are split and counter-propagate through an effusive beam and a vapor cell. An electric field applied across two parallel plates imposes Stark shifts on the ns 2S1 / 2 levels in the effusive beam. Electric-field strengths are measured in situ. The laser frequency is calibrated in the vapor cell using a phase modulation technique, with the modulation frequency referenced to the ground-state hyperfine splitting of atomic rubidium. Our measured 8 s 2S1 / 2 polarizability, 38370 +/- 380 a03, agrees with previous theory and experiments. Our measured 9 s 2S1 / 2 polarizability, 150700 +/- 1100 a03, agrees within two sigma of theory, but we are unaware of previous measurements. We also verify that these polarizabilities are independent of the hyperfine levels, placing upper limits on the differential polarizabilities of 200 +/- 260 a03 for the 8 s 2S1 / 2 state and 490 +/- 450 a03 for the 9 s 2S1 / 2 state. Supported by the National Science Foundation under Grant PHY-0653107.

  9. Synthesis of main group, rare-earth, and d{sup 0} metal complexes containing beta-hydrogen

    SciTech Connect

    Yan, Ka King

    2013-01-01

    A series of organometallic compounds containing the tris(dimethylsilyl)methyl ligand are described. The potassium carbanions KC(SiHMe2)3 and KC(SiHMe2})3TMEDA are synthesized by deprotonation of the hydrocarbon HC(SiHMe2)3 with potassium benzyl. KC(SiHMe2)3TMEDA crystallizes as a dimer with two types of three-center-two-electron KH- Si interactions. Homoleptic Ln(III) tris(silylalkyl) complexes containing β-SiH groups M{C(SiHMe2)3}3 (Ln = Y, Lu, La) are synthesized from salt elimination of the corresponding lanthanide halide and 3 equiv. of KC(SiHMe2)3. The related reactions with Sc yield bis(silylalkyl) ate-complexes containing either LiCl or KCl. The divalent calcium and ytterbium compounds M{C(SiHMe2)3}2L (M = Ca, Yb; L = THF2 or TMEDA) are prepared from MI2 and 2 equiv of KC(SiHMe2)3. The compounds M{C(SiHMe2)3}2L (M = Ca, Yb; L = THF2 or TMEDA) and La{C(SiHMe2)3}3 react with 1 equiv of B(C6F5)3 to give 1,3- disilacyclobutane {Me2Si-C(SiHMe2)2}2 and MC(SiHMe2)3HB(C6F5)3L, and La{C(SiHMe2)3}2HB(C6F5)3, respectively. The corresponding reactions of Ln{C(SiHMe2)3}3 (Ln = Y, Lu) give the β-SiH abstraction product [{(Me2HSi)3C}2LnC(SiHMe2)2SiMe2][HB(C6F5)3] (Ln = Y, Lu), but the silene remains associated with the Y or Lu center. The abstraction reactions of M{C(SiHMe2)3}2L (M = Ca, Yb; L = THF2or TMEDA) and Ln{C(SiHMe2)3}3 (Ln = Y, Lu, La) and 2 equiv of B(C6

  10. Measurement of the Mass and Width of the Ds1(2536)+ Meson

    SciTech Connect

    Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Martinelli, M.; Milanes, D.A.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Brown, D.N.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; Osipenkov, I.L.; Koch, H.; Schroeder, T.; Asgeirsson, D.J.; /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /INFN, Trieste /INFN, Trieste /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Ferrara /Ferrara U. /Frascati /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Genoa /Genoa U. /Indian Inst. Tech., Guwahati /Harvard U. /Harvey Mudd Coll. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa State U. /Iowa State U. /Johns Hopkins U. /Orsay, LAL /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U., Comp. Sci. Dept. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Naples /Naples U. /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Trieste /INFN, Trieste /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Padua /Padua U. /Paris U., VI-VII /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Perugia /Perugia U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Pisa /Princeton U. /INFN, Trieste /INFN, Trieste /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Trieste /INFN, Trieste /INFN, Rome /Rome U. /Rostock U. /Rutherford /DAPNIA, Saclay /SLAC /South Carolina U. /Southern Methodist U. /Stanford U., Phys. Dept. /SUNY, Albany /Tel Aviv U. /Tennessee U. /Texas U. /Texas U., Dallas /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /Valencia U., IFIC /Victoria U. /Warwick U. /Wisconsin U., Madison

    2011-08-19

    The decay width and mass of the D{sub s1}(2536){sup +} meson are measured via the decay channel D{sub s1}{sup +} {yields} D*{sup +} K{sub S}{sup 0} using 385 fb{sup -1} of data recorded with the BABAR detector in the vicinity of the {Upsilon}(4S) resonance at the PEP-II asymmetric-energy electron-positron collider. The result for the decay width is {Gamma}(D{sub s1}{sup +}) = 0.92 {+-} 0.03 (stat.) {+-} 0.04 (syst.)MeV. For the mass, a value of m(D{sub s1}{sup +}) = 2535.08 {+-} 0.01 (stat.) {+-} 0.15 (syst.)MeV/c{sup 2} is obtained. The mass difference between the D{sub s1}{sup +} and the D*{sup +} is measured to be m(D{sub s1}{sup +})-m(D*{sup +}) = 524.83 {+-} 0.01 (stat.) {+-} 0.04 (syst.)MeV/c{sup 2}, representing a significant improvement compared to the current world average. The unnatural spin-parity assignment for the D{sub s1}{sup +} meson is confirmed.

  11. Glide of dislocations in <1 1 1>{3 2 1} slip system: an atomistic study

    NASA Astrophysics Data System (ADS)

    Terentyev, D.; Bakaev, A.; Van Neck, D.; Zhurkin, E. E.

    2016-01-01

    Atomistic calculations are performed to investigate plastic slip in the <1 1 1>{3 2 1} system in body-centred cubic iron. Several modern interatomic potentials, developed over the last decade, are applied to compute the stacking fault γ-line energy in the {3 2 1} plane and the results are compared with the ab initio prediction. The applied potentials have shown strong deviations, but several potentials acquired good qualitative agreement with the ab initio data. Depending on the applied potential, the lowest value of the Peierls stress for the edge dislocation (ED) is 50 MPa (Ackland and Bacon from 1997) and the highest is 550 MPa (Dudarev and Derlet from 2005), while for the screw dislocation it is much higher, in the range 1-2 GPa. At finite temperature, however, the flow stress of the ED is found to decrease exponentially reaching a negligible value at about 200 K, irrespective of the applied potential. On the basis of the data obtained using Ackland-Mendelev potential from 2004, we conclude that the slip resistance of the <1 1 1>{3 2 1} system is in between the resistance of the <1 1 1>{1 1 0} and <1 1 1>{1 1 2} slip systems.

  12. Radiolytic oxidation of 1,2,4-benzenetriol. An application of time-resolved resonance Raman spectroscopy to kinetic studies of reaction intermediates

    SciTech Connect

    Qin, L.; Tripathi, G.N.R.; Schuler, R.H.

    1987-03-26

    In acidic solution, 1,2,4-benzenetriol is rapidly oxidized by OH or N/sub 3/ to form a mixture of neutral 2,4- and 3,4-dihydroxyphenoxyl radicals. At higher pH these radicals deprotonate (pK/sub a/(1) = 4.75) to form the 2-hydroxy-p-benzosemiquinone radical anion which exhibits a prominent resonance Raman band at 1625 cm/sup -1/ attributable to the Wilson 8a ring stretching mode. In basic solutions this radical subsequently reacts with OH/sup -/ to form the radical dianion (pK/sub a/(2) = 8.85) in which the 8a band is shifted to an appreciably lower frequency (1587 cm/sup -1/). While the absorption spectra of these latter radicals are very similar and do not allow ready examination of their interconversion by absorption spectrophotometry, the difference between these 8a frequencies is sufficiently great that the Raman method can be used to examine the acid-base equilibrium between the two forms of the radical and to follow the deprotonation kinetics. It is shown that even at high pH the radical monoanion is initially formed on oxidation by N/sub 3/ and that deprotonation subsequently occurs by its reaction with base with a rate constant of (9.6 +/- 1.5) x 10/sup 9/ M/sup -1/ d/sup -1/. These studies illustrate very well the application of time-resolved resonance Raman spectroscopy as a complement to kinetic spectrophotometry in sorting out the details of secondary processes in pulse radiolysis studies.

  13. BRCA1 and BRCA2 gene testing

    MedlinePlus

    ... gov/ency/patientinstructions/000690.htm BRCA1 and BRCA2 gene testing To use the sharing features on this ... br east ca ncer. What is the BRCA Gene Mutation? BRCA1 and BRCA2 are genes that suppress ...

  14. A general route to labile niobium and tantalum d{sup 0} monoimides. Discussion of metal-nitrogen vibrational modes

    SciTech Connect

    Korolev, A.V.; Rheingold, A.L.; Williams, D.S.

    1997-06-04

    Reaction of TaCl{sub 5} with 2 equiv of an amine in the presence of sodium silicate and pyridine affords Ta(NR)Cl{sub 3}(py){sub 2} in good yield. Reaction of NbCl{sub 5} with ZnCl{sub 2} followed by addition of an amine RNH{sub 2} and pyridine affords M(NR)Cl{sub 3}(dme) (dme is 1,2-dimethoxyethane). For niobium this reaction proceeds smoothly regardless of the amine but is ineffective with tantalum and alkyl amines. An alternative route involves reaction of TaCl{sub 5} with 3 equiv of RNH{sub 2} to form [RNH{sub 3}]{sub 2}[Ta(NR)Cl{sub 5}], followed by reaction of this salt with ZnCl{sub 2} in the presence of dme. The molecular structure of Nb(N{sup t}Bu)Cl{sub 3}(dme) (formula C{sub 8}H{sub 19}Cl{sub 3}NNbO{sub 2}) was determined by X-ray crystallography (monoclinic space group Cc with a = 30.565(4) {angstrom}, b = 7.2406(13) {angstrom}, c = 13.915(2) {angstrom}, {beta} = 90.626(7){degrees}, V = 3079.4(8) {angstrom}{sup 3}, Z = 8). The Nb-N bond length is 1.72 {angstrom} with a Nb-N-C bond angle of 177{degrees} in a distorted octahedral structure. In order to characterize the M-N stretching frequencies in these compounds, IR data for each compound are compared with calculated stretching frequencies using the commercially available Sparten calculation package. These experiments reveal that there is no real M-N stretching frequency in these imidos. Rather, the M-N modes are strongly coupled to N-C and C-H or C-C modes in these imidos. IR active modes are observed at {approximately}1260 cm{sup -1} for tantalum alkyl imidos and {approximately}1350 cm{sup -1} for tantalum aryl imidos. These correspond to a Ta-(N-C) stretch coupled to the CR{sub 3} umbrella deformation. 28 refs., 2 figs., 4 tabs.

  15. 17 CFR 2.1 - Description.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 17 Commodity and Securities Exchanges 1 2013-04-01 2013-04-01 false Description. 2.1 Section 2.1 Commodity and Securities Exchanges COMMODITY FUTURES TRADING COMMISSION OFFICIAL SEAL § 2.1 Description. Pursuant to section 2(a)(10) of the Commodity Exchange Act, as amended, 7 U.S.C. 4(i), the Commodity Futures Trading Commission has adopted...

  16. 17 CFR 2.1 - Description.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 17 Commodity and Securities Exchanges 1 2012-04-01 2012-04-01 false Description. 2.1 Section 2.1 Commodity and Securities Exchanges COMMODITY FUTURES TRADING COMMISSION OFFICIAL SEAL § 2.1 Description. Pursuant to section 2(a)(10) of the Commodity Exchange Act, as amended, 7 U.S.C. 4(i), the Commodity Futures Trading Commission has adopted...

  17. 17 CFR 2.1 - Description.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 17 Commodity and Securities Exchanges 1 2010-04-01 2010-04-01 false Description. 2.1 Section 2.1 Commodity and Securities Exchanges COMMODITY FUTURES TRADING COMMISSION OFFICIAL SEAL § 2.1 Description. Pursuant to section 2(a)(10) of the Commodity Exchange Act, as amended, 7 U.S.C. 4(i), the Commodity Futures Trading Commission has adopted...

  18. 17 CFR 2.1 - Description.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 17 Commodity and Securities Exchanges 1 2011-04-01 2011-04-01 false Description. 2.1 Section 2.1 Commodity and Securities Exchanges COMMODITY FUTURES TRADING COMMISSION OFFICIAL SEAL § 2.1 Description. Pursuant to section 2(a)(10) of the Commodity Exchange Act, as amended, 7 U.S.C. 4(i), the Commodity Futures Trading Commission has adopted...

  19. 17 CFR 2.1 - Description.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 17 Commodity and Securities Exchanges 1 2014-04-01 2014-04-01 false Description. 2.1 Section 2.1 Commodity and Securities Exchanges COMMODITY FUTURES TRADING COMMISSION OFFICIAL SEAL § 2.1 Description. Pursuant to section 2(a)(10) of the Commodity Exchange Act, as amended, 7 U.S.C. 4(i), the Commodity Futures Trading Commission has adopted...

  20. Analyzing powers for the {sup 2}H({ital {rvec p}},{ital pn}){sup 1}H reaction at 200 MeV

    SciTech Connect

    Pairsuwan, W.; Watson, J.W.; Ahmad, M.; Chant, N.S.; Flanders, B.S.; Madey, R.; Pella, P.J.; Roos, P.G. ||

    1995-11-01

    We measured the analyzing power {ital A}{sub {ital y}} and the triple differential cross section {ital d}{sup 3}{sigma}/{ital d}{Omega}{sub {ital pd}}{Omega}{sub {ital ndE}}{sub {ital p}} for the {sup 2}H({ital {rvec p}},{ital pn}){sup 1}H reaction at 200 MeV. Coplanar coincidence data were taken for all combinations of neutron angles {theta}{sub {ital n}}=35{degree}, 45{degree}, or 55{degree} with proton angles {theta}{sub {ital p}}=35{degree}, 45{degree}, or 52{degree}. Protons were detected with a {Delta}{ital E}-{ital E} telescope with a 1000-{mu}m silicon surface barrier {Delta}{ital E} detector and a plastic scintillator {ital E} detector. Neutrons were detected with large-volume plastic scintillators at flight paths of 17.5 or 18 m. The overall neutron separation-energy resolution was about 3 MeV. Data are compared with plane-wave impulse-approximation calculations with a Hulthen deuteron wave function and {ital p}-{ital n} cross sections and analyzing powers obtained from {ital N}-{ital N} phase shifts. The agreement between these calculations and the data is generally good for the cross sections. The agreement for the analyzing powers is good near the point of zero recoil momentum. Our results suggest that the deuteron is a good ``neutron target`` for recoil momenta {lt}100 MeV/{ital c}.

  1. 26 CFR 1.851-2 - Limitations.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 9 2011-04-01 2011-04-01 false Limitations. 1.851-2 Section 1.851-2 Internal... TAXES (CONTINUED) Regulated Investment Companies and Real Estate Investment Trusts § 1.851-2 Limitations... more issuers which meet the following limitations: (a) The entire amount of the securities of...

  2. 26 CFR 1.856-2 - Limitations.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 9 2011-04-01 2011-04-01 false Limitations. 1.856-2 Section 1.856-2 Internal... TAXES (CONTINUED) Real Estate Investment Trusts § 1.856-2 Limitations. (a) Effective date. The... the 30-percent-of-gross-income limitation. (3) Commitment fees. For purposes of section 856(c)...

  3. 26 CFR 1.527-2 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 26 Internal Revenue 7 2014-04-01 2013-04-01 true Definitions. 1.527-2 Section 1.527-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Farmers' Cooperatives § 1.527-2 Definitions. For purposes of section 527 and...

  4. 26 CFR 1.527-2 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 26 Internal Revenue 7 2012-04-01 2012-04-01 false Definitions. 1.527-2 Section 1.527-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Farmers' Cooperatives § 1.527-2 Definitions. For purposes of section 527 and...

  5. 26 CFR 1.527-2 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 26 Internal Revenue 7 2013-04-01 2013-04-01 false Definitions. 1.527-2 Section 1.527-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Farmers' Cooperatives § 1.527-2 Definitions. For purposes of section 527 and...

  6. 26 CFR 1.527-2 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 7 2010-04-01 2010-04-01 true Definitions. 1.527-2 Section 1.527-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Farmers' Cooperatives § 1.527-2 Definitions. For purposes of section 527 and...

  7. 26 CFR 1.4-2 - Elections.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 26 Internal Revenue 1 2013-04-01 2013-04-01 false Elections. 1.4-2 Section 1.4-2 Internal Revenue....4-2 Elections. (a) Making of election. The election to pay the optional tax imposed under section 3... the standard deduction provided by section 141. (b) Election under section 3 and election of...

  8. 26 CFR 1.4-2 - Elections.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 26 Internal Revenue 1 2012-04-01 2012-04-01 false Elections. 1.4-2 Section 1.4-2 Internal Revenue....4-2 Elections. (a) Making of election. The election to pay the optional tax imposed under section 3... the standard deduction provided by section 141. (b) Election under section 3 and election of...

  9. 26 CFR 1.4-2 - Elections.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 1 2010-04-01 2010-04-01 true Elections. 1.4-2 Section 1.4-2 Internal Revenue....4-2 Elections. (a) Making of election. The election to pay the optional tax imposed under section 3... the standard deduction provided by section 141. (b) Election under section 3 and election of...

  10. 26 CFR 1.4-2 - Elections.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 1 2011-04-01 2009-04-01 true Elections. 1.4-2 Section 1.4-2 Internal Revenue....4-2 Elections. (a) Making of election. The election to pay the optional tax imposed under section 3... the standard deduction provided by section 141. (b) Election under section 3 and election of...

  11. 26 CFR 1.6664-2 - Underpayment.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 13 2011-04-01 2011-04-01 false Underpayment. 1.6664-2 Section 1.6664-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Additions to the Tax, Additional Amounts, and Assessable Penalties § 1.6664-2 Underpayment. (a) Underpayment defined. In...

  12. 26 CFR 1.341-2 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 26 Internal Revenue 4 2014-04-01 2014-04-01 false Definitions. 1.341-2 Section 1.341-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Collapsible Corporations; Foreign Personal Holding Companies § 1.341-2 Definitions. (a) Determination of collapsible corporation....

  13. 26 CFR 1.6001-2 - Returns.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 26 Internal Revenue 13 2013-04-01 2013-04-01 false Returns. 1.6001-2 Section 1.6001-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Information and Returns § 1.6001-2 Returns. For rules relating to returns required...

  14. 26 CFR 1.6001-2 - Returns.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 26 Internal Revenue 13 2012-04-01 2012-04-01 false Returns. 1.6001-2 Section 1.6001-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Information and Returns § 1.6001-2 Returns. For rules relating to returns required...

  15. 26 CFR 1.6001-2 - Returns.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 13 2011-04-01 2011-04-01 false Returns. 1.6001-2 Section 1.6001-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Information and Returns § 1.6001-2 Returns. For rules relating to returns required...

  16. 26 CFR 1.6001-2 - Returns.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 13 2010-04-01 2010-04-01 false Returns. 1.6001-2 Section 1.6001-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES Information and Returns § 1.6001-2 Returns. For rules relating to returns required to be made...

  17. 26 CFR 1.190-2 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 3 2010-04-01 2010-04-01 false Definitions. 1.190-2 Section 1.190-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES Itemized Deductions for Individuals and Corporations (continued) § 1.190-2 Definitions. For purposes of section 190 and the...

  18. 26 CFR 1.190-2 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 26 Internal Revenue 3 2012-04-01 2012-04-01 false Definitions. 1.190-2 Section 1.190-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Itemized Deductions for Individuals and Corporations (continued) § 1.190-2 Definitions. For purposes of section 190 and...

  19. 1 CFR 9.2 - Scope.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 1 General Provisions 1 2010-01-01 2010-01-01 false Scope. 9.2 Section 9.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER SPECIAL EDITIONS OF THE FEDERAL REGISTER THE UNITED STATES... include— (1) Descriptions of the agency's public purposes, programs and functions; (2) Established...

  20. 1 CFR 9.2 - Scope.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 1 General Provisions 1 2011-01-01 2011-01-01 false Scope. 9.2 Section 9.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER SPECIAL EDITIONS OF THE FEDERAL REGISTER THE UNITED STATES... include— (1) Descriptions of the agency's public purposes, programs and functions; (2) Established...

  1. 41 CFR 51-2.1 - Membership.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 41 Public Contracts and Property Management 1 2011-07-01 2009-07-01 true Membership. 51-2.1 Section 51-2.1 Public Contracts and Property Management Other Provisions Relating to Public Contracts COMMITTEE FOR PURCHASE FROM PEOPLE WHO ARE BLIND OR SEVERELY DISABLED 2-COMMITTEE FOR PURCHASE FROM...

  2. 41 CFR 51-2.1 - Membership.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 41 Public Contracts and Property Management 1 2013-07-01 2013-07-01 false Membership. 51-2.1 Section 51-2.1 Public Contracts and Property Management Other Provisions Relating to Public Contracts COMMITTEE FOR PURCHASE FROM PEOPLE WHO ARE BLIND OR SEVERELY DISABLED 2-COMMITTEE FOR PURCHASE FROM...

  3. 45 CFR 1210.1-2 - Scope.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 45 Public Welfare 4 2013-10-01 2013-10-01 false Scope. 1210.1-2 Section 1210.1-2 Public Welfare Regulations Relating to Public Welfare (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE VISTA TRAINEE DESELECTION AND VOLUNTEER EARLY TERMINATION PROCEDURES General § 1210.1-2 Scope. (a) This part applies to all Trainees and...

  4. 45 CFR 1211.1-2 - Applicability.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 45 Public Welfare 4 2013-10-01 2013-10-01 false Applicability. 1211.1-2 Section 1211.1-2 Public Welfare Regulations Relating to Public Welfare (Continued) CORPORATION FOR NATIONAL AND COMMUNITY SERVICE VOLUNTEER GRIEVANCE PROCEDURES § 1211.1-2 Applicability. This part applies to all volunteers enrolled under part A of title I of the...

  5. 44 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 44 Emergency Management and Assistance 1 2014-10-01 2014-10-01 false Definitions. 1.2 Section 1.2 Emergency Management and Assistance FEDERAL EMERGENCY MANAGEMENT AGENCY, DEPARTMENT OF HOMELAND SECURITY... Emergency Management Agency. (e) Major rule means any regulation that is likely to result in: (1) An...

  6. 44 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 44 Emergency Management and Assistance 1 2012-10-01 2011-10-01 true Definitions. 1.2 Section 1.2 Emergency Management and Assistance FEDERAL EMERGENCY MANAGEMENT AGENCY, DEPARTMENT OF HOMELAND SECURITY... Emergency Management Agency. (e) Major rule means any regulation that is likely to result in: (1) An...

  7. 44 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 44 Emergency Management and Assistance 1 2013-10-01 2013-10-01 false Definitions. 1.2 Section 1.2 Emergency Management and Assistance FEDERAL EMERGENCY MANAGEMENT AGENCY, DEPARTMENT OF HOMELAND SECURITY... Emergency Management Agency. (e) Major rule means any regulation that is likely to result in: (1) An...

  8. Structural basis of the impact sensitivities of 1-picryl-1,2,3-triazole, 2-picryl-1,2,3-triazole, 4-nitro-1-picryl-1,2,3-triazole, and 4-nitro-2-picryl-1,2,3-triazole

    SciTech Connect

    Storm, C.B.; Ryan, R.R.; Ritchie, J.P.; Hall, J.H.; Bachrach, S.M. )

    1989-01-26

    The isomeric pairs 1-picryl-1,2,3-triazole, 2-picryl-1,2,3-triazole and 4-nitro-1-picryl-1,2,3-triazole, 4-nitro-1-picryl-1,2,3-triazole differ dramatically in their impact sensitivity. Since these pairs of compounds have identical oxygen balance this strongly suggests that there is a difference in the decomposition mechanism. The authors report here the x-ray crystal structure, molecular orbital calculations, and {sup 13}C and {sup 1}H NMR spectra of the four compounds. The picryl substituents are essentially identical in all four cases. The most significant structural difference in the X-ray structures and in the molecular orbital calculations is a decrease in the N2-N3 bond length, accompanied by a lengthening of the adjacent bonds, in the two 1-picryl isomers relative to the corresponding bond lengths in the 2-picryl isomers. Molecular orbital calculations show that this leads to a low activation energy for the elimination of N{sub 2} from the 1-picryl isomers. They suggest that this initial step then leads to a reactive intermediate and is responsible for the large difference in sensitivity.

  9. Correlation dynamics between electrons and ions in the fragmentation of D{sub 2} molecules by short laser pulses

    SciTech Connect

    Tong, X.M.; Zhao, Z.X.; Lin, C.D.

    2003-10-01

    We studied the recollision dynamics between the electrons and D{sub 2}{sup +} ions following the tunneling ionization of D{sub 2} molecules in an intense short pulse laser field. The returning electron collisionally excites the D{sub 2}{sup +} ion to excited electronic states; from there D{sub 2}{sup +} can dissociate or be further ionized by the laser field, resulting in D{sup +}+D or D{sup +}+D{sup +}, respectively. We modeled the fragmentation dynamics and calculated the resulting kinetic-energy spectrum of D{sup +} to compare with recent experiments. Since the recollision time is locked to the tunneling ionization time which occurs only within a fraction of an optical cycle, the peaks in the D{sup +} kinetic-energy spectra provide a measure of the time when the recollision occurs. This collision dynamics forms the basis of the molecular clock where the clock can be read with attosecond precision, as first proposed by Corkum and co-workers. By analyzing each of the elementary processes leading to the fragmentation quantitatively, we identified how the molecular clock is to be read from the measured kinetic-energy spectra of D{sup +} and what laser parameters are to be used to measure the clock more accurately.

  10. CYP2S1: A short review

    SciTech Connect

    Saarikoski, Sirkku T. . E-mail: sirkku.saarikoski@ktl.fi; Rivera, Steven P.; Hankinson, Oliver; Husgafvel-Pursiainen, Kirsti

    2005-09-01

    A new member of the cytochrome P450 superfamily, CYP2S1, has recently been identified in human and mouse. In this paper, we review the data currently available for CYP2S1. The human CYP2S1 gene is located in chromosome 19q13.2 within a cluster including CYP2 family members CYP2A6, CYP2A13, CYP2B6, and CYP2F1. These genes also show the highest homology to the human CYP2S1. The gene has recently been found to harbor genetic polymorphism. CYP2S1 is inducible by dioxin, the induction being mediated by the Aryl Hydrocarbon Receptor (AHR) and Aryl Hydrocarbon Nuclear Translocator (ARNT) in a manner typical for CYP1 family members. In line with this, CYP2S1 has been shown to be inducible by coal tar, an abundant source of PAHs, and it was recently reported to metabolize naphthalene. This points to the involvement of CYP2S1 in the metabolism of toxic and carcinogenic compounds, similar to other dioxin-inducible CYPs. CYP2S1 is expressed in epithelial cells of a wide variety of extrahepatic tissues. The highest expression levels have been observed in the epithelial tissues frequently exposed to xenobiotics, e.g., the respiratory, gastrointestinal, and urinary tracts, and in the skin. The observed ubiquitous tissue distribution, as well as the expression of CYP2S1 throughout embryogenesis suggest that CYP2S1 is likely to metabolize important endogenous substrates; thus far, retinoic acid has been identified. In conclusion, CYP2S1 exhibits many features of interest for human health and thus warrants further investigation.

  11. CYP2S1: a short review.

    PubMed

    Saarikoski, Sirkku T; Rivera, Steven P; Hankinson, Oliver; Husgafvel-Pursiainen, Kirsti

    2005-09-01

    A new member of the cytochrome P450 superfamily, CYP2S1, has recently been identified in human and mouse. In this paper, we review the data currently available for CYP2S1. The human CYP2S1 gene is located in chromosome 19q13.2 within a cluster including CYP2 family members CYP2A6, CYP2A13, CYP2B6, and CYP2F1. These genes also show the highest homology to the human CYP2S1. The gene has recently been found to harbor genetic polymorphism. CYP2S1 is inducible by dioxin, the induction being mediated by the Aryl Hydrocarbon Receptor (AHR) and Aryl Hydrocarbon Nuclear Translocator (ARNT) in a manner typical for CYP1 family members. In line with this, CYP2S1 has been shown to be inducible by coal tar, an abundant source of PAHs, and it was recently reported to metabolize naphthalene. This points to the involvement of CYP2S1 in the metabolism of toxic and carcinogenic compounds, similar to other dioxin-inducible CYPs. CYP2S1 is expressed in epithelial cells of a wide variety of extrahepatic tissues. The highest expression levels have been observed in the epithelial tissues frequently exposed to xenobiotics, e.g., the respiratory, gastrointestinal, and urinary tracts, and in the skin. The observed ubiquitous tissue distribution, as well as the expression of CYP2S1 throughout embryogenesis suggest that CYP2S1 is likely to metabolize important endogenous substrates; thus far, retinoic acid has been identified. In conclusion, CYP2S1 exhibits many features of interest for human health and thus warrants further investigation. PMID:16054184

  12. Synthesis, structure, and reactivity of 1,2-(1{prime},1{prime},2{prime},2{prime}-tetramethyldisilane-1{prime},2{prime})carborane

    SciTech Connect

    Rege, F.M. de; Kassebaum, J.D.; Scott, B.L.; Abney, K.D.; Balaich, G.J.

    1999-02-08

    The novel strained compound 1,2-(1{prime},1{prime},2{prime},2{prime}-tetramethyldisilane-1{prime},2{prime})carborane (1) was synthesized by the reaction of 1,2-dilithiocarborane and dichlorotetramethyldisilane. Compound 1 was characterized by solution methods and its structure determined by single-crystal X-ray diffraction. In contrast to its organic analogue o-(disilanyl)-phenylene, the reaction of 1 with ethanol leads to cleavage of a Si-C bond rather than a Si-Si bond. Similarly to other cyclic disilanes, exposure of a solution of 1 to oxygen leads to the insertion of an oxygen atom into the Si-Si bond. The structure of the oxygen inserted product was also determined by X-ray crystallography. The general chemistry and attempts at polymerizing 1 are briefly discussed.

  13. Kinetics of the fluorination/chlorination of 1-chloro-1,2,2,2-tetrafluoroethane

    SciTech Connect

    Coulson, D.R. )

    1993-07-01

    The kinetics of the catalytic fluorination and chlorination of 1-chloro-1,2,2,2-tetrafluoroethane (HCFC-124) by HF and HCl to give pentafluoroethane (HFC-125) and 1,1-dichloro-2,2-trifluoroethane (HCFC-123), respectively, were examined in order to further define the mechanisms of these reactions. An HF-treated preparation of 2% CoCl[sub 2] on Al[sub 2]O[sub 3] was used as a catalyst. Reaction of deuterium-labeled HCFC-124 With HF or HCl showed the deuterium to be retained in both reactant and products, suggesting the absence of carbenoid or olefinic intermediates in these halogenations. Thermodynamic and thermokinetic properties of these halogenations were also determined in order to determine the extent of contributions of reverse reactions to the kinetics of these halogenations. Kinetic studies indicated that these halogenations are consistent with a classical Langmuir-Hinshelwood mechanism where both HX (X = F or Cl) and HCFC-124 are adsorbed on identical active sites of the catalyst in the rate-determining step. 17 refs., 5 figs., 5 tabs.

  14. Dynamics of CO2 fluxes and concentrations during a shallow subsurface CO2 release

    SciTech Connect

    Lewicki, J.L.; Hilley, G.E.; Dobeck, L.; Spangler, L.

    2009-09-01

    A field facility located in Bozeman, Montana provides the opportunity to test methods to detect, locate, and quantify potential CO2 leakage from geologic storage sites. From 9 July to 7 August 2008, 0.3 t CO2 d{sup -1} were injected from a 100-m long, {approx}2.5 m deep horizontal well. Repeated measurements of soil CO2 fluxes on a grid characterized the spatio-temporal evolution of the surface leakage signal and quantified the surface leakage rate. Infrared CO2 concentration sensors installed in the soil at 30 cm depth at 0 to 10 m from the well and at 4 cm above the ground at 0 and 5 m from the well recorded surface breakthrough of CO2 leakage and migration of CO2 leakage through the soil. Temporal variations in CO2 concentrations were correlated with atmospheric and soil temperature, wind speed, atmospheric pressure, rainfall, and CO2 injection rate.

  15. Acid-sensing ion channel (ASIC) 1a/2a heteromers have a flexible 2:1/1:2 stoichiometry.

    PubMed

    Bartoi, Tudor; Augustinowski, Katrin; Polleichtner, Georg; Gründer, Stefan; Ulbrich, Maximilian H

    2014-06-01

    Acid-sensing ion channels (ASICs) are widely expressed proton-gated Na(+) channels playing a role in tissue acidosis and pain. A trimeric composition of ASICs has been suggested by crystallization. Upon coexpression of ASIC1a and ASIC2a in Xenopus oocytes, we observed the formation of heteromers and their coexistence with homomers by electrophysiology, but could not determine whether heteromeric complexes have a fixed subunit stoichiometry or whether certain stoichiometries are preferred over others. We therefore imaged ASICs labeled with green and red fluorescent proteins on a single-molecule level, counted bleaching steps from GFP and colocalized them with red tandem tetrameric mCherry for many individual complexes. Combinatorial analysis suggests a model of random mixing of ASIC1a and ASIC2a subunits to yield both 2:1 and 1:2 ASIC1a:ASIC2a heteromers together with ASIC1a and ASIC2a homomers. PMID:24847067

  16. DOE-2, BDL summary. Version 2.1E

    SciTech Connect

    Winkelmann, F.C.; Birdsall, B.E.; Buhl, W.F.; Ellington, K.L.; Erdem, A.E.; Hirsch, J.J.; Gates, S.

    1993-11-01

    This document contains summary information on all commands and keywords in the DOE-2 Building Description Language (BDL). It also contains supplementary tables and maps. The fundamentals of BDL are discussed in Chapter II of the Reference Manual (2.1A); detailed descriptions of the commands and keywords summarized here can be found in the Reference Manual (2.1A) and in the Supplement (2.1E).

  17. C2H2F4 1,1,2,2-Tetrafluoroethane

    NASA Astrophysics Data System (ADS)

    Demaison, J.

    This document is part of Part 1 of Subvolume D 'Asymmetric Top Molecules' of Volume 29 'Molecular Constants Mostly from Microwave, Molecular Beam, and Sub-Doppler Laser Spectroscopy' of Landolt-Börnstein - Group II 'Molecules and Radicals'.

  18. Vought O2U-1 Corsair

    NASA Technical Reports Server (NTRS)

    1930-01-01

    Vought O2U-1 Corsair: The Vought O2U-1 was the first Vought airplane to carry the name Corsair. The O2U was built as an observation aircraft for the Navy, and the example flown by the NACA for evaluation and cowling tests was one of the last O2U-1s built. This Corsair came from the Naval Reserve squadron at Naval Air Station Anacostia, Washington, D. C.

  19. Consolidated Fleet N2Y-1

    NASA Technical Reports Server (NTRS)

    1930-01-01

    Consolidated Fleet N2Y-1: The Consolidated Fleet N2Y-1 aircraft were used as trainers for the pilots who would fly the 'parasite' fighters attached to the airships Akron and Macon. This N2Y-1 was turned over to the NACA for research work. Note that the vertical surfaces are instrumented for NACA work. This N2Y was used for landing gear tests.

  20. 7 CFR 1b.2 - Policy.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 1 2013-01-01 2013-01-01 false Policy. 1b.2 Section 1b.2 Agriculture Office of the Secretary of Agriculture NATIONAL ENVIRONMENTAL POLICY ACT § 1b.2 Policy. (a) All policies and programs of the various USDA agencies shall be planned, developed, and implemented so as to achieve the goals and to follow the procedures declared by...

  1. The Consolidated Fleet XN2Y-1

    NASA Technical Reports Server (NTRS)

    1935-01-01

    The Consolidated Fleet XN2Y-1 was a Fleet 1 trainer purchased by the Navy for evaluation. The purchase of several N2Y-1 aircraft followed, for use as trainers for the pilots who would fly the 'parasite' fighters attached to the airships Akron and Macon. The XN2Y-1 was turned over to the NACA for research work. Note the that vertical surfaces are instrumented for NACA spin work.

  2. 1 CFR 456.2 - Organization.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 1 General Provisions 1 2011-01-01 2011-01-01 false Organization. 456.2 Section 456.2 General Provisions MISCELLANEOUS AGENCIES NATIONAL CAPITAL PLANNING COMMISSION (FREEDOM OF INFORMATION ACT REGULATIONS) § 456.2 Organization. The Commission is the central planning agency for the Federal Government...

  3. 43 CFR 3140.2-1 - Forms.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 43 Public Lands: Interior 2 2014-10-01 2014-10-01 false Forms. 3140.2-1 Section 3140.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) LEASING IN SPECIAL TAR SAND AREAS Conversion of...

  4. 43 CFR 3140.2-1 - Forms.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 43 Public Lands: Interior 2 2012-10-01 2012-10-01 false Forms. 3140.2-1 Section 3140.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) LEASING IN SPECIAL TAR SAND AREAS Conversion of...

  5. 43 CFR 3140.2-1 - Forms.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 43 Public Lands: Interior 2 2013-10-01 2013-10-01 false Forms. 3140.2-1 Section 3140.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) LEASING IN SPECIAL TAR SAND AREAS Conversion of...

  6. 43 CFR 3140.2-1 - Forms.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 43 Public Lands: Interior 2 2011-10-01 2011-10-01 false Forms. 3140.2-1 Section 3140.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) LEASING IN SPECIAL TAR SAND AREAS Conversion of...

  7. 43 CFR 3453.2-1 - Application.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 43 Public Lands: Interior 2 2012-10-01 2012-10-01 false Application. 3453.2-1 Section 3453.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MANAGEMENT OF EXISTING LEASES Transfers by...

  8. 43 CFR 3453.2-1 - Application.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 43 Public Lands: Interior 2 2014-10-01 2014-10-01 false Application. 3453.2-1 Section 3453.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MANAGEMENT OF EXISTING LEASES Transfers by...

  9. 43 CFR 3453.2-1 - Application.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 43 Public Lands: Interior 2 2011-10-01 2011-10-01 false Application. 3453.2-1 Section 3453.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MANAGEMENT OF EXISTING LEASES Transfers by...

  10. 43 CFR 3453.2-1 - Application.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 43 Public Lands: Interior 2 2013-10-01 2013-10-01 false Application. 3453.2-1 Section 3453.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MANAGEMENT OF EXISTING LEASES Transfers by...

  11. Vought O2U-1 Corsair

    NASA Technical Reports Server (NTRS)

    1928-01-01

    Vought O2U-1 Corsair: Suspended from the roof of the NACA's hangar at Langley Field, this Vought O2U-1 Corsair retains its float undercarriage, a contrast to other O2Us flown by the NACA which were operated on wheeled landing gear.

  12. 1 CFR 301.2 - Purposes.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 1 General Provisions 1 2011-01-01 2011-01-01 false Purposes. 301.2 Section 301.2 General Provisions ADMINISTRATIVE CONFERENCE OF THE UNITED STATES ORGANIZATION AND PURPOSE § 301.2 Purposes. The purposes of the Administrative Conference are— (a) To provide suitable arrangements through which...

  13. 1 CFR 15.2 - Information services.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 1 General Provisions 1 2013-01-01 2012-01-01 true Information services. 15.2 Section 15.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER PREPARATION, TRANSMITTAL, AND PROCESSING OF DOCUMENTS SERVICES TO FEDERAL AGENCIES General § 15.2 Information services. The Director of the...

  14. 1 CFR 15.2 - Information services.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 1 General Provisions 1 2010-01-01 2010-01-01 false Information services. 15.2 Section 15.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER PREPARATION, TRANSMITTAL, AND PROCESSING OF DOCUMENTS SERVICES TO FEDERAL AGENCIES General § 15.2 Information services. The Director of the...

  15. 1 CFR 15.2 - Information services.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 1 General Provisions 1 2014-01-01 2012-01-01 true Information services. 15.2 Section 15.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER PREPARATION, TRANSMITTAL, AND PROCESSING OF DOCUMENTS SERVICES TO FEDERAL AGENCIES General § 15.2 Information services. The Director of the...

  16. 43 CFR 1784.2-1 - Composition.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 43 Public Lands: Interior 2 2012-10-01 2012-10-01 false Composition. 1784.2-1 Section 1784.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT... Composition. (a) Each advisory committee shall be structured to provide fair membership balance,...

  17. 43 CFR 1784.2-1 - Composition.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 43 Public Lands: Interior 2 2014-10-01 2014-10-01 false Composition. 1784.2-1 Section 1784.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT... Composition. (a) Each advisory committee shall be structured to provide fair membership balance,...

  18. 43 CFR 1784.2-1 - Composition.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 43 Public Lands: Interior 2 2011-10-01 2011-10-01 false Composition. 1784.2-1 Section 1784.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT... Composition. (a) Each advisory committee shall be structured to provide fair membership balance,...

  19. 43 CFR 1784.2-1 - Composition.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 43 Public Lands: Interior 2 2013-10-01 2013-10-01 false Composition. 1784.2-1 Section 1784.2-1 Public Lands: Interior Regulations Relating to Public Lands (Continued) BUREAU OF LAND MANAGEMENT... Composition. (a) Each advisory committee shall be structured to provide fair membership balance,...

  20. 1 CFR 2.6 - Unrestricted use.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 1 General Provisions 1 2012-01-01 2012-01-01 false Unrestricted use. 2.6 Section 2.6 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER GENERAL GENERAL INFORMATION § 2.6 Unrestricted use. Any person may reproduce or republish, without restriction, any material appearing in any...

  1. 1 CFR 2.6 - Unrestricted use.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 1 General Provisions 1 2010-01-01 2010-01-01 false Unrestricted use. 2.6 Section 2.6 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER GENERAL GENERAL INFORMATION § 2.6 Unrestricted use. Any person may reproduce or republish, without restriction, any material appearing in any...

  2. 1 CFR 8.2 - Orderly development.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 1 General Provisions 1 2011-01-01 2011-01-01 false Orderly development. 8.2 Section 8.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER SPECIAL EDITIONS OF THE FEDERAL REGISTER CODE OF FEDERAL REGULATIONS § 8.2 Orderly development. To assure orderly development of the Code of...

  3. 1 CFR 2.6 - Unrestricted use.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 1 General Provisions 1 2013-01-01 2012-01-01 true Unrestricted use. 2.6 Section 2.6 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER GENERAL GENERAL INFORMATION § 2.6 Unrestricted use. Any person may reproduce or republish, without restriction, any material appearing in any...

  4. 1 CFR 8.2 - Orderly development.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 1 General Provisions 1 2014-01-01 2012-01-01 true Orderly development. 8.2 Section 8.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER SPECIAL EDITIONS OF THE FEDERAL REGISTER CODE OF FEDERAL REGULATIONS § 8.2 Orderly development. To assure orderly development of the Code of...

  5. 1 CFR 8.2 - Orderly development.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 1 General Provisions 1 2013-01-01 2012-01-01 true Orderly development. 8.2 Section 8.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER SPECIAL EDITIONS OF THE FEDERAL REGISTER CODE OF FEDERAL REGULATIONS § 8.2 Orderly development. To assure orderly development of the Code of...

  6. 1 CFR 2.6 - Unrestricted use.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 1 General Provisions 1 2014-01-01 2012-01-01 true Unrestricted use. 2.6 Section 2.6 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER GENERAL GENERAL INFORMATION § 2.6 Unrestricted use. Any person may reproduce or republish, without restriction, any material appearing in any...

  7. 1 CFR 8.2 - Orderly development.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 1 General Provisions 1 2012-01-01 2012-01-01 false Orderly development. 8.2 Section 8.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER SPECIAL EDITIONS OF THE FEDERAL REGISTER CODE OF FEDERAL REGULATIONS § 8.2 Orderly development. To assure orderly development of the Code of...

  8. 1 CFR 8.2 - Orderly development.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 1 General Provisions 1 2010-01-01 2010-01-01 false Orderly development. 8.2 Section 8.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER SPECIAL EDITIONS OF THE FEDERAL REGISTER CODE OF FEDERAL REGULATIONS § 8.2 Orderly development. To assure orderly development of the Code of...

  9. 1 CFR 2.6 - Unrestricted use.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 1 General Provisions 1 2011-01-01 2011-01-01 false Unrestricted use. 2.6 Section 2.6 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER GENERAL GENERAL INFORMATION § 2.6 Unrestricted use. Any person may reproduce or republish, without restriction, any material appearing in any...

  10. 28 CFR 2.1 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... identical or comparable terms as used in chapter 311 of part IV of title 18 of the U.S. Code or 28 CFR... 28 Judicial Administration 1 2010-07-01 2010-07-01 false Definitions. 2.1 Section 2.1 Judicial Administration DEPARTMENT OF JUSTICE PAROLE, RELEASE, SUPERVISION AND RECOMMITMENT OF PRISONERS, YOUTH...

  11. 1 and 2 Dimensional Bose Einstein Condensates

    NASA Astrophysics Data System (ADS)

    Vogels, Johnny; Gorlitz, Axel; Raman, Chandra; Gustavson, Todd; Drndic, Marija; Leanhardt, Aaron; Abo-Shaeer, Jamil; Loew, Robert; Ketterle, Wolfgang

    2001-05-01

    We have created condensates in which the zero point motion exceeds the mean field enegy in either 2 (1D-condensate) or 1 dimension (2D-condensate). We describe the optical traps and magnetic traps being used, their limitations, and the regimes that are accessible. Some of our 1D condensates should have limited coherence properties (quasi-condensates).

  12. 26 CFR 1.709-2 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 8 2010-04-01 2010-04-01 false Definitions. 1.709-2 Section 1.709-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME... the Internal Revenue Code defines organizational expenses as expenses which: (1) Are incident to...

  13. 44 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., appliances, services, or allowances therefor or to valuations, costs or accounting, or practices relating to... 44 Emergency Management and Assistance 1 2011-10-01 2011-10-01 false Definitions. 1.2 Section 1.2 Emergency Management and Assistance FEDERAL EMERGENCY MANAGEMENT AGENCY, DEPARTMENT OF HOMELAND...

  14. 48 CFR 1.602-2 - Responsibilities.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 48 Federal Acquisition Regulations System 1 2013-10-01 2013-10-01 false Responsibilities. 1.602-2... ACQUISITION REGULATIONS SYSTEM Career Development, Contracting Authority, and Responsibilities 1.602-2 Responsibilities. Contracting officers are responsible for ensuring performance of all necessary actions...

  15. 48 CFR 1.602-2 - Responsibilities.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 48 Federal Acquisition Regulations System 1 2014-10-01 2014-10-01 false Responsibilities. 1.602-2... ACQUISITION REGULATIONS SYSTEM Career Development, Contracting Authority, and Responsibilities 1.602-2 Responsibilities. Contracting officers are responsible for ensuring performance of all necessary actions...

  16. 24 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... participates in carrying out such program or activity (such as a redeveloper in the Urban Renewal Program... 24 Housing and Urban Development 1 2010-04-01 2010-04-01 false Definitions. 1.2 Section 1.2 Housing and Urban Development Office of the Secretary, Department of Housing and Urban...

  17. 24 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... participates in carrying out such program or activity (such as a redeveloper in the Urban Renewal Program... 24 Housing and Urban Development 1 2013-04-01 2013-04-01 false Definitions. 1.2 Section 1.2 Housing and Urban Development Office of the Secretary, Department of Housing and Urban...

  18. 24 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... participates in carrying out such program or activity (such as a redeveloper in the Urban Renewal Program... 24 Housing and Urban Development 1 2014-04-01 2014-04-01 false Definitions. 1.2 Section 1.2 Housing and Urban Development Office of the Secretary, Department of Housing and Urban...

  19. 24 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... participates in carrying out such program or activity (such as a redeveloper in the Urban Renewal Program... 24 Housing and Urban Development 1 2012-04-01 2012-04-01 false Definitions. 1.2 Section 1.2 Housing and Urban Development Office of the Secretary, Department of Housing and Urban...

  20. 24 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... participates in carrying out such program or activity (such as a redeveloper in the Urban Renewal Program... 24 Housing and Urban Development 1 2011-04-01 2011-04-01 false Definitions. 1.2 Section 1.2 Housing and Urban Development Office of the Secretary, Department of Housing and Urban...

  1. 50 CFR 2.1 - Regional offices.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., endangered species stations, fishery assistance offices, national fish hatcheries, national wildlife refuges... 50 Wildlife and Fisheries 1 2012-10-01 2012-10-01 false Regional offices. 2.1 Section 2.1 Wildlife and Fisheries UNITED STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR GENERAL...

  2. 50 CFR 2.1 - Regional offices.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., endangered species stations, fishery assistance offices, national fish hatcheries, national wildlife refuges... 50 Wildlife and Fisheries 1 2013-10-01 2013-10-01 false Regional offices. 2.1 Section 2.1 Wildlife and Fisheries UNITED STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR GENERAL...

  3. 50 CFR 2.1 - Regional offices.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ..., endangered species stations, fishery assistance offices, national fish hatcheries, national wildlife refuges... 50 Wildlife and Fisheries 1 2010-10-01 2010-10-01 false Regional offices. 2.1 Section 2.1 Wildlife and Fisheries UNITED STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR GENERAL...

  4. 50 CFR 2.1 - Regional offices.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., endangered species stations, fishery assistance offices, national fish hatcheries, national wildlife refuges... 50 Wildlife and Fisheries 1 2011-10-01 2011-10-01 false Regional offices. 2.1 Section 2.1 Wildlife and Fisheries UNITED STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR GENERAL...

  5. 1 CFR 9.2 - Scope.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 1 General Provisions 1 2013-01-01 2012-01-01 true Scope. 9.2 Section 9.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER SPECIAL EDITIONS OF THE FEDERAL REGISTER THE UNITED STATES... include— (1) Descriptions of the agency's legal authorities, public purposes, programs, and functions;...

  6. 1 CFR 9.2 - Scope.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 1 General Provisions 1 2014-01-01 2012-01-01 true Scope. 9.2 Section 9.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER SPECIAL EDITIONS OF THE FEDERAL REGISTER THE UNITED STATES... include— (1) Descriptions of the agency's legal authorities, public purposes, programs, and functions;...

  7. 1 CFR 9.2 - Scope.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 1 General Provisions 1 2012-01-01 2012-01-01 false Scope. 9.2 Section 9.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER SPECIAL EDITIONS OF THE FEDERAL REGISTER THE UNITED STATES... include— (1) Descriptions of the agency's legal authorities, public purposes, programs, and functions;...

  8. 48 CFR 1.602-2 - Responsibilities.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 48 Federal Acquisition Regulations System 1 2011-10-01 2011-10-01 false Responsibilities. 1.602-2... ACQUISITION REGULATIONS SYSTEM Career Development, Contracting Authority, and Responsibilities 1.602-2 Responsibilities. Contracting officers are responsible for ensuring performance of all necessary actions...

  9. Measurement of the q2 Dependence of the Hadronic Form Factor in D0 to K- e+ nu_e Decays

    SciTech Connect

    Aubert, B.

    2006-09-26

    A preliminary measurement of the q{sup 2} dependence of the D{sup 0} {yields} K{sup -}e{sup +}{nu}{sub e} decay rate is presented. This rate is proportional to the hadronic form factor squared, specified by a single parameter. This is either the mass in the simple pole ansatz m{sub pole} = (1.854 {+-} 0.016 {+-} 0.020) GeV/c{sup 2} or the scale in the modified pole ansatz {alpha}{sub pole} = 0.43 {+-} 0.03 {+-} 0.04. The first error refers to the statistical, the second to the systematic uncertainty.

  10. Stereodynamics of small 1,2-dialkyldiaziridines.

    PubMed

    Kamuf, Matthias; Trapp, Oliver

    2013-04-01

    Diaziridines are very interesting representatives of organic compounds containing stereogenic nitrogen atoms. In particular, 1,2-dialkyldiaziridines show extraordinarily high stereointegrity. The lone electron pairs of the nitrogen atoms are in trans configuration, avoiding a four-electron repulsive interaction. Furthermore, the trans configuration of the substituents at the nitrogen atoms is energetically favored because of reduced steric interactions. Therefore only two stereoisomers (enantiomers) are observed. At elevated temperatures the enantiomers are interconverting because of the limited stereointegrity of the chirotopic nitrogen atoms. The enantiomerization rate constants and the activation parameters of interconversion are of great interest. Here, we investigated the stereodynamics of a set of small 1,2-dialkyldiaziridines bearing short substituents (Me, Et, iPr, tBu), using enantioselective dynamic gas chromatography (DGC). Separation of enantiomers of all compounds, including the highly volatile 1,2-dimethyldiaziridine, was achieved using heptakis(2,3-di-O-ethyl-6-O-tert-butyldimethylsilyl)-β-cyclodextrin in 50% PS086 (w/w) as chiral stationary phase in fused silica capillaries with a length of up to 50 m. Measurements at variable temperatures were performed and reaction rate constants were determined using the unified equation of chromatography implemented in the software DCXplorer. The activation barriers at room temperature for 1-(tert-butyl)-2-ethyldiaziridine, ΔG(╪)(298K) = 123.8 kJ mol(-1) (ΔH(╪) = 115.5±2.9 kJ mol(-1), ΔS(╪) = -28±1 J mol(-1) K(-1)), and 1-ethyl-2-isopropyldiaziridine, ΔG(╪)(298K) = 124.2 kJ mol(-1) (ΔH(╪) = 113.1±2.4 kJ mol(-1), ΔS(╪) = -37±2 J mol(-1) K(-1)), were determined, representing some of the highest values observed for nitrogen inversion in diaziridines. PMID:23401088

  11. High precision measurements of hyperfine structure in Tm II, N/sub 2//sup +/ and Sc II

    SciTech Connect

    Mansour, N.B.; Dinneen, T.P.; Young, L.

    1988-01-01

    We have applied the technique of collinear fast-ion-beam laser spectroscopy to measure the hyperfine structure (hfs) in Sc II, Tm II and N/sub 2//sup +/. Laser induced fluorescence was observed from a 50 keV ion beam which was superimposed with the output of an actively stabilized ring dye laser (rms bandwidth <1 MHz). Hyperfine measurements were made in the metastable 3d/sup 2/ and the excited 3d4p configuration of Sc II and in the 4f/sup 13/6s and 4f/sup 13/5d configurations of the Tm II. The fine and hyperfine structure of N/sub 2//sup +/ has been observed in the (0,1) and (1,2) band of B/sup 2/..sigma../sub u//sup +//minus/X/sup 2/..sigma../sub g//sup +/ system. Higher resolution measurements of the metastable 3d/sup 2/ configuration in Sc II were also made by laser-rf double resonance. The experimental results will be compared with those obtained by multiconfiguration Hartree-Fock ab-initio calculations. 15 refs., 4 figs., 5 tabs.

  12. Liquid effluent FY 1996 program plan WBS 1.2.2.1. Revision 1

    SciTech Connect

    1995-09-01

    The Liquid Effluents Program supports the three Hanford Site mission components: (1) Clean up the site, (2) provide scientific and technological excellence to meet global needs, and (3) Partner in the economic diversification of the region. Nine Hanford Site objectives have been established for the Hanford Site programs to accomplish all three components of this mission.

  13. Renormalons and 1/Q2 corrections

    NASA Astrophysics Data System (ADS)

    Akhoury, R.; Zakharov, V. I.

    1997-06-01

    We argue that the appearance of the Landau pole in the running coupling of QCD introduces 1/Q2 power corrections in current correlator functions. These terms are not accounted for by the standard operator product expansion and is the price to be paid for the lack of a unique definition of the running coupling at the 1/Q2 level. We review also possible phenomenological implications of the 1/Q2 terms in an alternative language of ultraviolet renormalon.

  14. BLDG 1 LOOKING TOWARDS BLDG 2 & 2A Naval ...

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

    BLDG 1 LOOKING TOWARDS BLDG 2 & 2A - Naval Magazine Lualualei, Headquarters Branch, Administration Building, Between Constitution & Constellation Streets, east side of main quad, Pearl City, Honolulu County, HI

  15. 41 CFR 51-2.1 - Membership.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... COMMITTEE FOR PURCHASE FROM PEOPLE WHO ARE BLIND OR SEVERELY DISABLED 2-COMMITTEE FOR PURCHASE FROM PEOPLE WHO ARE BLIND OR SEVERELY DISABLED § 51-2.1 Membership. Under the JWOD Act, the Committee is...

  16. 41 CFR 51-2.1 - Membership.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... COMMITTEE FOR PURCHASE FROM PEOPLE WHO ARE BLIND OR SEVERELY DISABLED 2-COMMITTEE FOR PURCHASE FROM PEOPLE WHO ARE BLIND OR SEVERELY DISABLED § 51-2.1 Membership. Under the JWOD Act, the Committee is...

  17. 1,2,3-Triazoles as inhibitors of indoleamine 2,3-dioxygenase 2 (IDO2).

    PubMed

    Röhrig, Ute F; Majjigapu, Somi Reddy; Caldelari, Daniela; Dilek, Nahzli; Reichenbach, Patrick; Ascencao, Kelly; Irving, Melita; Coukos, George; Vogel, Pierre; Zoete, Vincent; Michielin, Olivier

    2016-09-01

    Indoleamine 2,3-dioxygenase 2 (IDO2) is a potential therapeutic target for the treatment of diseases that involve immune escape such as cancer. In contrast to IDO1, only a very limited number of inhibitors have been described for IDO2 due to inherent difficulties in expressing and purifying a functionally active, soluble form of the enzyme. Starting from our previously discovered highly efficient 4-aryl-1,2,3-triazole IDO1 inhibitor scaffold, we used computational structure-based methods to design inhibitors of IDO2 which we then tested in cellular assays. Our approach yielded low molecular weight inhibitors of IDO2, the most active displaying an IC50 value of 51μM for mIDO2, and twofold selectivity over hIDO1. These compounds could be useful as molecular probes to investigate the biological role of IDO2, and could inspire the design of new IDO2 inhibitors. PMID:27469130

  18. 2 CFR 215.1 - Purpose.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 2 Grants and Agreements 1 2010-01-01 2010-01-01 false Purpose. 215.1 Section 215.1 Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET CIRCULARS AND GUIDANCE Reserved UNIFORM ADMINISTRATIVE... ORGANIZATIONS (OMB CIRCULAR A-110) General § 215.1 Purpose. This part establishes uniform...

  19. X-RAY OBSERVATIONS OF THE SUPERNOVA REMNANT CTB 87 (G74.9+1.2): AN EVOLVED PULSAR WIND NEBULA

    SciTech Connect

    Matheson, H.; Safi-Harb, S.; Kothes, R. E-mail: samar@physics.umanitoba.ca

    2013-09-01

    Pulsar wind nebulae (PWNe) studies with the Chandra X-Ray Observatory have opened a new window to address the physics of pulsar winds, zoom on their interaction with their hosting supernova remnant (SNR) and interstellar medium, and identify their powering engines. We here present a new 70 ks, plus an archived 18 ks, Chandra ACIS observation of the SNR CTB 87 (G74.9+1.2), classified as a PWN with unusual radio properties and poorly studied in X-rays. We find that the peak of the X-ray emission is clearly offset from the peak of the radio emission by {approx}100'' and located at the southeastern edge of the radio nebula. We detect a point source-the putative pulsar-at the peak of the X-ray emission and study its spectrum separately from the PWN. This new point source, CXOU J201609.2+371110, is surrounded by a compact nebula displaying a torus-like structure and possibly a jet. A more extended diffuse nebula is offset from the radio nebula, extending from the point source to the northwest for {approx}250''. The spectra of the point source, compact nebula, and extended diffuse nebula are all well described by a power-law model with a photon index of 1.1 (0.7-1.6), 1.2 (0.9-1.4), and 1.7 (1.5-1.8), respectively, for a column density N{sub H} = 1.38 (1.21-1.57) Multiplication-Sign 10{sup 22} cm{sup -2} (90% confidence). The total X-ray luminosity of the source is {approx}1.6 Multiplication-Sign 10{sup 34} erg s{sup -1} at an assumed distance of 6.1 kpc, with {approx}2% and 6% contribution from the point source and compact nebula, respectively. The observed properties suggest that CTB 87 is an evolved ({approx}5-28 kyr) PWN, with the extended radio emission likely a ''relic'' PWN, as in Vela-X and G327.1-1.1. To date, however, there is no evidence for thermal X-ray emission from this SNR, and the SNR shell is still missing, suggesting expansion into a low-density medium (n{sub 0} < 0.2 D{sup -1/2}{sub 6.1} cm{sup -3}), likely caused by a stellar wind bubble blown by the

  20. Fluoride ion-catalyzed 1,2-desilylative defluorination: syntheses of 1-substituted 2,2-difluorostyrenes.

    PubMed

    Nakamura, Yutaka; Uneyama, Kenji

    2007-07-20

    1-(3'-Chlorophenyl)-1-trimethylsilyl-1,2,2,2-tetrafluoroethane has been prepared in an excellent yield by the Mg-promoted defluorinative silylation of 3-chloropentafluoroethylbenzene and transformed to a series of 1-substituted 2,2-difluorostyrenes by fluoride ion-catalyzed 1,2-desilylative defluorination. PMID:17583960

  1. Synthesis of N1-tritylethane-1,1,2,2-d4-1,2-diamine: a novel mono-protected C-deuterated ethylenediamine synthon

    SciTech Connect

    Yang, Jun; Hong, Kunlun; Bonnesen, Peter V

    2012-01-01

    A convenient and high-yield synthesis for N1-tritylethane-1,1,2,2-d4-1,2-diamine, a novel mono-protected ethylenediamine-C-d4, is reported. N1-tritylethane-1,1,2,2-d4-1,2-diamine was prepared in three steps from ethylene oxide-d4 in a combined yield in the range 68-76%. Also reported is a synthesis of ethylenediamine-C-d4 in two steps from 1,2-dibromoethane-d4 in a combined yield in the range 61-65%.

  2. Phylogeography of influenza A H5N1 clade 2.2.1.1 in Egypt

    PubMed Central

    2013-01-01

    Background Influenza A H5N1 has killed millions of birds and raises serious public health concern because of its potential to spread to humans and cause a global pandemic. While the early focus was in Asia, recent evidence suggests that Egypt is a new epicenter for the disease. This includes characterization of a variant clade 2.2.1.1, which has been found almost exclusively in Egypt. We analyzed 226 HA and 92 NA sequences with an emphasis on the H5N1 2.2.1.1 strains in Egypt using a Bayesian discrete phylogeography approach. This allowed modeling of virus dispersion between Egyptian governorates including the most likely origin. Results Phylogeography models of hemagglutinin (HA) and neuraminidase (NA) suggest Ash Sharqiyah as the origin of virus spread, however the support is weak based on Kullback–Leibler values of 0.09 for HA and 0.01 for NA. Association Index (AI) values and Parsimony Scores (PS) were significant (p-value < 0.05), indicating that dispersion of H5N1 in Egypt was geographically structured. In addition, the Ash Sharqiyah to Al Gharbiyah and Al Fayyum to Al Qalyubiyah routes had the strongest statistical support. Conclusion We found that the majority of routes with strong statistical support were in the heavily populated Delta region. In particular, the Al Qalyubiyah governorate appears to represent a popular location for virus transition as it represented a large portion of branches in both trees. However, there remains uncertainty about virus dispersion to and from this location and thus more research needs to be conducted in order to examine this. Phylogeography can highlight the drivers of H5N1 emergence and spread. This knowledge can be used to target public health efforts to reduce morbidity and mortality. For Egypt, future work should focus on using data about vaccination and live bird markets in phylogeography models to study their impact on H5N1 diffusion within the country. PMID:24325606

  3. Arabidopsis MSI1 connects LHP1 to PRC2 complexes.

    PubMed

    Derkacheva, Maria; Steinbach, Yvonne; Wildhaber, Thomas; Mozgová, Iva; Mahrez, Walid; Nanni, Paolo; Bischof, Sylvain; Gruissem, Wilhelm; Hennig, Lars

    2013-07-17

    Polycomb group (PcG) proteins form essential epigenetic memory systems for controlling gene expression during development in plants and animals. However, the mechanism of plant PcG protein functions remains poorly understood. Here, we probed the composition and function of plant Polycomb repressive complex 2 (PRC2). This work established the fact that all known plant PRC2 complexes contain MSI1, a homologue of Drosophila p55. While p55 is not essential for the in vitro enzymatic activity of PRC2, plant MSI1 was required for the functions of the EMBRYONIC FLOWER and the VERNALIZATION PRC2 complexes including trimethylation of histone H3 Lys27 (H3K27) at the target chromatin, as well as gene repression and establishment of competence to flower. We found that MSI1 serves to link PRC2 to LIKE HETEROCHROMATIN PROTEIN 1 (LHP1), a protein that binds H3K27me3 in vitro and in vivo and is required for a functional plant PcG system. The LHP1-MSI1 interaction forms a positive feedback loop to recruit PRC2 to chromatin that carries H3K27me3. Consequently, this can provide a mechanism for the faithful inheritance of local epigenetic information through replication. PMID:23778966

  4. 3-Methyl-1-(prop-2-en-1-yl)quinoxalin-2(1H)-one

    PubMed Central

    Ramli, Youssef; Slimani, Rachid; Zouihri, Hafid; Lazar, Saïd; Essassi, E. M.

    2010-01-01

    In the mol­ecule of the title compound, C12H12N2O, the quinoxaline ring is planar with an r.m.s. deviation of 0.007 (15) Å. The dihedral angle between the quinoxaline and propenyl planes is 82.1 (2)°. The crystal packing is stabilized by offset π–π stacking between the quinoxaline rings [centroid–centroid distance = 3.8832 (9) Å]. PMID:21587981

  5. LANDSAT-1 and LANDSAT-2 flight evaluation

    NASA Technical Reports Server (NTRS)

    1976-01-01

    Flight performances of LANDSAT 1 and LANDSAT 2 are evaluated. The in-flight systems discussed are: (1) power supplies, (2) attitude control, (3) command/clock, (4) telemetry, (5) orbit adjust, (6) electrical interface, (7) thermal, (8) tape recorders, (9) multispectral scanner, (10) data collection and (11) magnetic moment compensating assembly. Tables are presented for easy reference.

  6. 1 CFR 456.2 - Organization.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 1 General Provisions 1 2010-01-01 2010-01-01 false Organization. 456.2 Section 456.2 General Provisions MISCELLANEOUS AGENCIES NATIONAL CAPITAL PLANNING COMMISSION (FREEDOM OF INFORMATION ACT... Section; (d) Management Services Section; (e) Planning and Programming Division; (f) Review...

  7. 3-2-1 Contact Teacher's Guide.

    ERIC Educational Resources Information Center

    Children's Television Workshop, New York, NY.

    This guide to the television program 3-2-1 Contact covers 20 theme weeks. The program is designed to bring students into closer contact with the science and technology in their everyday lives. This guide includes: (1) a brief introduction to the contents of each week's shows; (2) a detailed discussion of each week's primary concepts as well as…

  8. Vought SB2U-1 Vindicator

    NASA Technical Reports Server (NTRS)

    1937-01-01

    Vought SB2U-1 Vindicator: The graceful lines of an airplane were aided by a concerted effort in drag reduction. Here a Vought SB2U-1 Vindicator is studied in Langley's 30 x 60 Full Scale Tunnel. This evaluation took place in September 1937.

  9. BRCA1 and BRCA2 gene testing

    MedlinePlus

    The BRCA1 and BRCA2 gene test is a blood test that can tell you if you have a higher risk of getting cancer. The name ... BRCA1 and BRCA2 are genes that suppress malignant tumors (cancer) in ... change (become mutated) they do not suppress tumors like they ...

  10. 1 CFR 11.2 - Federal Register.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... monthly Federal Register Index, and the monthly LSA (List of CFR Sections Affected) is $808 per year for... 1 General Provisions 1 2013-01-01 2012-01-01 true Federal Register. 11.2 Section 11.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER AVAILABILITY OF OFFICE OF THE FEDERAL...

  11. 1 CFR 11.2 - Federal Register.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... monthly Federal Register Index, and the monthly LSA (List of CFR Sections Affected) is $808 per year for... 1 General Provisions 1 2014-01-01 2012-01-01 true Federal Register. 11.2 Section 11.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER AVAILABILITY OF OFFICE OF THE FEDERAL...

  12. 1 CFR 11.2 - Federal Register.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... monthly Federal Register Index, and the monthly LSA (List of CFR Sections Affected) is $808 per year for... 1 General Provisions 1 2011-01-01 2011-01-01 false Federal Register. 11.2 Section 11.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER AVAILABILITY OF OFFICE OF THE FEDERAL...

  13. 1 CFR 11.2 - Federal Register.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... monthly Federal Register Index, and the monthly LSA (List of CFR Sections Affected) is $808 per year for... 1 General Provisions 1 2012-01-01 2012-01-01 false Federal Register. 11.2 Section 11.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER AVAILABILITY OF OFFICE OF THE FEDERAL...

  14. 1 CFR 11.2 - Federal Register.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... monthly Federal Register Index, and the monthly LSA (List of CFR Sections Affected) is $808 per year for... 1 General Provisions 1 2010-01-01 2010-01-01 false Federal Register. 11.2 Section 11.2 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER AVAILABILITY OF OFFICE OF THE FEDERAL...

  15. Measurement of sigma(Lambda(b)0) / sigma(anti-B 0) x B(Lambda0(b) ---> Lambda+(c) pi-) / B(anti-B0 ---> D+ pi-) in p anti-p collisions at S**(1/2) = 1.96-TeV

    SciTech Connect

    Abulencia, A.; Acosta, D.; Adelman, Jahred A.; Affolder, Anthony A.; Akimoto, T.; Albrow, M.G.; Ambrose, D.; Amerio, S.; Amidei, D.; Anastassov, A.; Anikeev, K.; /Taiwan, Inst. Phys. /Argonne /Barcelona, IFAE /Baylor U. /INFN, Bologna /Bologna U. /Brandeis U. /UC, Davis /UCLA /UC, San Diego /UC, Santa Barbara

    2006-01-01

    The authors present the first observation of the baryon decay {Lambda}{sub b}{sup 0} {yields} {Lambda}{sub c}{sup +} {pi}{sup -} followed by {Lambda}{sub c}{sup +} {yields} pK{sup -} {pi}{sup +} in 106 pb{sup -1} p{bar p} collisions at {radical}s = 1.96 TeV in the CDF experiment. IN order to reduce systematic error, the measured rate for {Lambda}{sub b}{sup 0} decay is normalized to the kinematically similar meson decay {bar B}{sup 0} {yields} D{sup +}{pi}{sup -} followed by D{sup +} {yields} {pi}{sup +}K{sup -}{pi}{sup +}. They report the ratio of production cross sections ({sigma}) times the ratio of branching fractions ({Beta}) for the momentum region integrated above p{sub T} > 6 GeV/c and pseudorapidity range |{eta}| < 1.3: {sigma}(p{bar p} {yields} {Lambda}{sub b}{sup 0}X)/{sigma}(p{bar p} {yields} {bar B}{sup 0} X) x {Beta}({Lambda}{sub b}{sup 0} {yields} {Lambda}{sub c}{sup +}{pi}{sup -})/{Beta}({bar B}{sup 0} {yields} D{sup +}{pi}{sup -}) = 0.82 {+-} 0.08(stat) {+-} 0.11(syst) {+-} 0.22 ({Beta}({Lambda}{sub c}{sup +} {yields} pK{sup -} {pi}{sup +})).

  16. Affine Kac-Moody symmetric spaces related with A1^{(1)}, A2^{(1)},} A2^{(2)}

    NASA Astrophysics Data System (ADS)

    Nayak, Saudamini; Pati, K. C.

    2014-08-01

    Symmetric spaces associated with Lie algebras and Lie groups which are Riemannian manifolds have recently got a lot of attention in various branches of Physics for their role in classical/quantum integrable systems, transport phenomena, etc. Their infinite dimensional counter parts have recently been discovered which are affine Kac-Moody symmetric spaces. In this paper we have (algebraically) explicitly computed the affine Kac-Moody symmetric spaces associated with affine Kac-Moody algebras A1^{(1)}, A2^{(1)}, A2^{(2)}. We hope these types of spaces will play similar roles as that of symmetric spaces in many physical systems.

  17. Accessing 2,1-Borazaronaphthols: Self-Arylation of 1-Alkyl-2-aryl-3-bromo-2,1-borazaronaphthalenes

    PubMed Central

    2015-01-01

    Unlike their B-alkyl counterparts, brominated N-alkyl B-aryl 2,1-borazaronaphthalenes undergo a self-arylation reaction in the presence of a catalytic amount of palladium and base, in which the azaborine serves as both the electrophile and the nucleophile. The products of the self-arylation are air- and moisture-stable 2,1-borazaronaphthols, previously only observed in basic alcoholic solvents. The steric encumbrance of the azaborine appears to prevent formation of the corresponding boron acid anhydride, allowing access to a family of 2,1-borazaronaphthol derivatives. PMID:25133658

  18. Thermal conductivity and viscosity of 2,2-Dichloro-1,1,1-Trifluoroethane (HCFC-123)

    SciTech Connect

    Tanaka, Y.; Sotani, T.

    1996-03-01

    The thermal conductivity and the viscosity data of CFC alternative refrigerant HCFC-123 (2,2-dichloro-1,1,1-trifluoroethane; CHCl{sub 2}-CF{sub 3}) were critically evaluated and correlated on the basis of a comprehensive literature survey. Using the residual transport-property concept, we have developed the three-dimensional surfaces of the thermal conductivity-temperature-density and the viscosity-temperature-density. A dilute-gas function and an excess function of simple form were established for each property. The critical enhancement contribution was taken no account because reliable crossover equations of state and the thermal conductivity data are still missing in the critical region. The correlation for the thermal conductivity is valid at temperatures from 253 to 373 K, pressures up to 30 MPa, and densities up to 1623 kg{center_dot}m{sup -3}. The correlation for the viscosity is valid at temperatures from 253 to 423 K, pressures up to 20 MPa, and densities up to 1608 kg{center_dot}m{sup -3}. The uncertainties of the present correlations are estimated to be 5% for both properties, since the experimental data are still scarce and somewhat contradictory in the vapor phase at present.

  19. AC conductivity and relaxation mechanism in (Nd1/2Li1/2)(Fe1/2V1/2)O3 ceramics

    NASA Astrophysics Data System (ADS)

    Nath, Susmita; Barik, Subrat Kumar; Choudhary, R. N. P.

    2016-05-01

    In the present study we have synthesized polycrystalline sample of (Nd1/2Li1/2)(Fe1/2V1/2)O3 ceramic by a standard high-temperature solid-state reaction technique. Studies of dielectric and electrical properties of the compound have been carried out in a wide range of temperature (RT - 400 °C) and frequency (1kHz - 1MHz) using complex impedance spectroscopic technique. The imaginary vs. real component of the complex impedance plot (Nyquist plot) of the prepared sample exhibits the existence of grain, grain boundary contributions in the complex electrical parameters and negative temperature coefficient of resistance (NTCR) type behavior like semiconductor. Details study of ac conductivity plot reveals that the material obeys universal Jonscher's power law.

  20. Optical properties of large-area ultrathin MoS{sub 2} films: Evolution from a single layer to multilayers

    SciTech Connect

    Park, Jun Woo; So, Hyeon Seob; Kim, Sung; Choi, Suk-Ho; Lee, Hosun; Lee, Jinhwan; Lee, Changgu; Kim, Youngchan

    2014-11-14

    We investigated the optical properties of ultrathin MoS{sub 2} films (number of layers: N = 1, 2, 4, and 12) using Raman spectroscopy, photoluminescence (PL) spectroscopy, and spectroscopic ellipsometry. We estimated the layer thicknesses based on Raman spectra. We characterized the microstructural properties of a single-layer MoS{sub 2} film using atomic force microscopy. We measured the lowest-energy A and B excitons using PL spectroscopy. We measured the ellipsometric angles (Ψ and Δ) of MoS{sub 2} thin films using spectroscopic ellipsometry, and obtained the dielectric functions as the films' thickness changed from a single layer to multi-layers. We determined the films' optical gap energies from the absorption coefficients. Applying the standard critical point model to the second derivative of the dielectric function (d{sup 2}ε(E)/dE{sup 2}), we determined several critical point energies. The d{sup 2}ε(E)/dE{sup 2} spectra showed doublet peaks around 3 eV corresponding to the C and D transitions, as well as doublet peaks around 2 eV corresponding to the A and B transitions. These doublet structures at 3 eV are attributed to the transitions in the Brillouin zone between the Γ and K points.

  1. Loop quantum cosmology in 2 +1 dimension

    NASA Astrophysics Data System (ADS)

    Zhang, Xiangdong

    2014-12-01

    As a first step to generalize the structure of loop quantum cosmology to the theories with the spacetime dimension other than four, the isotropic model of loop quantum cosmology in 2 +1 dimension is studied in this paper. We find that the classical big bang singularity is again replaced by a quantum bounce in the model. The similarities and differences between the (2 +1 )-dimensional model and the (3 +1 )-dimensional one are also discussed.

  2. Alkyl substituted [2.2]paracyclophane-1,9-dienes.

    PubMed

    Lidster, Benjamin J; Kumar, Dharam R; Spring, Andrew M; Yu, Chin-Yang; Helliwell, Madeleine; Raftery, James; Turner, Michael L

    2016-07-01

    [2.2]Paracyclophane-1,9-dienes substituted with n-octyl chains have been synthesised from the corresponding dithia[3.3]paracyclophanes using a benzyne induced Stevens rearrangement. The use of 2-(trimethylsilyl)phenyl trifluoromethanesulfonate and tetra-n-butylammonium fluoride as the in situ benzyne source gave significantly improved yields over traditional sources of benzyne and enabled the preparation of n-octyl substituted [2.2]paracyclophane-1,9-dienes on a multi-gram scale. PMID:27249777

  3. Dehalogenimonas spp. can Reductively Dehalogenate High Concentrations of 1,2-Dichloroethane, 1,2-Dichloropropane, and 1,1,2-Trichloroethane

    PubMed Central

    2012-01-01

    The contaminant concentrations over which type strains of the species Dehalogenimonas alkenigignens and Dehalogenimonas lykanthroporepellens were able to reductively dechlorinate 1,2-dichloroethane (1,2-DCA), 1,2-dichloropropane (1,2-DCP), and 1,1,2-trichloroethane (1,1,2-TCA) were evaluated. Although initially isolated from an environment with much lower halogenated solvent concentrations, D. alkenigignens IP3-3T was found to reductively dehalogenate chlorinated alkanes at concentrations comparable to D. lykanthroporepellens BL-DC-9T. Both species dechlorinated 1,2-DCA, 1,2-DCP, and 1,1,2-TCA present at initial concentrations at least as high as 8.7, 4.0, and 3.5 mM, respectively. The ability of Dehalogenimonas spp. to carry out anaerobic reductive dechlorination even in the presence of high concentrations of chlorinated aliphatic alkanes has important implications for remediation of contaminated soil and groundwater. PMID:23046725

  4. Dehalogenimonas spp. can Reductively Dehalogenate High Concentrations of 1,2-Dichloroethane, 1,2-Dichloropropane, and 1,1,2-Trichloroethane.

    PubMed

    Maness, Andrew D; Bowman, Kimberly S; Yan, Jun; Rainey, Fred A; Moe, William M

    2012-01-01

    The contaminant concentrations over which type strains of the species Dehalogenimonas alkenigignens and Dehalogenimonas lykanthroporepellens were able to reductively dechlorinate 1,2-dichloroethane (1,2-DCA), 1,2-dichloropropane (1,2-DCP), and 1,1,2-trichloroethane (1,1,2-TCA) were evaluated. Although initially isolated from an environment with much lower halogenated solvent concentrations, D. alkenigignens IP3-3T was found to reductively dehalogenate chlorinated alkanes at concentrations comparable to D. lykanthroporepellens BL-DC-9T. Both species dechlorinated 1,2-DCA, 1,2-DCP, and 1,1,2-TCA present at initial concentrations at least as high as 8.7, 4.0, and 3.5 mM, respectively. The ability of Dehalogenimonas spp. to carry out anaerobic reductive dechlorination even in the presence of high concentrations of chlorinated aliphatic alkanes has important implications for remediation of contaminated soil and groundwater. PMID:23046725

  5. 8 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ..., Department of Justice, as defined in 8 CFR 1001.1(e). Case, unless the context otherwise requires, means any... in 8 CFR 1001.1(l). Immigration officer means the following employees of the Department of Homeland... designated by the Secretary of Homeland Security as provided in 8 CFR 2.1. Lawfully admitted for...

  6. 8 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ..., Department of Justice, as defined in 8 CFR 1001.1(e). Case, unless the context otherwise requires, means any... in 8 CFR 1001.1(l). Immigration officer means the following employees of the Department of Homeland... designated by the Secretary of Homeland Security as provided in 8 CFR 2.1. Lawfully admitted for...

  7. 8 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ..., Department of Justice, as defined in 8 CFR 1001.1(e). Case, unless the context otherwise requires, means any... in 8 CFR 1001.1(l). Immigration officer means the following employees of the Department of Homeland... designated by the Secretary of Homeland Security as provided in 8 CFR 2.1. Lawfully admitted for...

  8. Preparation of 1,1'-dinitro-3,3'-azo-1,2,4-triazole. [1,1'-dinitro-3,3'-azo-1,2,4-triazole

    DOEpatents

    Lee, K.Y.

    1985-03-05

    A new high density composition of matter, 1,1'-dinitro-3,3'-azo-1,2,4-triazole, has been synthesized using inexpensive, commonly available compounds. This compound has been found to be an explosive, and its use as a propellant is anticipated. 1 fig., 1 tab.

  9. Cisplatin inhibits MEK1/2

    PubMed Central

    Yamamoto, Tetsu; Tsigelny, Igor F.; Götz, Andreas W.; Howell, Stephen B.

    2015-01-01

    Cisplatin (cDDP) is known to bind to the CXXC motif of proteins containing a ferrodoxin-like fold but little is known about its ability to interact with other Cu-binding proteins. MEK1/2 has recently been identified as a Cu-dependent enzyme that does not contain a CXXC motif. We found that cDDP bound to and inhibited the activity of recombinant MEK1 with an IC50 of 0.28 μM and MEK1/2 in whole cells with an IC50 of 37.4 μM. The inhibition of MEK1/2 was relieved by both Cu+1 and Cu+2 in a concentration-dependent manner. cDDP did not inhibit the upstream pathways responsible for activating MEK1/2, and did not cause an acute depletion of cellular Cu that could account for the reduction in MEK1/2 activity. cDDP was found to bind MEK1/2 in whole cells and the extent of binding was augmented by supplementary Cu and reduced by Cu chelation. Molecular modeling predicts 3 Cu and cDDP binding sites and quantum chemistry calculations indicate that cDDP would be expected to displace Cu from each of these sites. We conclude that, at clinically relevant concentrations, cDDP binds to and inhibits MEK1/2 and that both the binding and inhibitory activity are related to its interaction with Cu bound to MEK1/2. This may provide the basis for useful interactions of cDDP with other drugs that inhibit MAPK pathway signaling. PMID:26155939

  10. Quantifying the surface-subsurface biogeochemical coupling during the VERTIGO ALOHA and K2 studies

    SciTech Connect

    Boyd, P.W.; Gall, M.P.; Silver, M.W.; Bishop, J.K.B.; Coale, Susan L.; Bidigare, Robert R.

    2008-02-25

    A central question addressed by the VERTIGO (VERtical Transport In the Global Ocean) study was 'What controls the efficiency of particle export between the surface and subsurface ocean'? Here, we present data from sites at ALOHA (N Central Pacific Gyre) and K2 (NW subarctic Pacific) on phytoplankton processes, and relate them via a simple planktonic foodweb model, to subsurface particle export (150-500 m). Three key factors enable quantification of the surface-subsurface coupling: a sampling design to overcome the temporal lag and spatial displacement between surface and subsurface processes; data on the size-partitioning of Net Primary Production (NPP) and subsequent transformations prior to export; estimates of the ratio of algal- to faecal-mediated vertical export flux. At ALOHA, phytoplankton were characterized by low stocks, NPP, F{sub v}/F{sub m} (N-limited), and were dominated by picoplankton. The HNLC waters at K2 were characterized by both two-fold changes in NPP and floristic shifts (high to low proportion of diatoms) between deployment 1 and 2. Prediction of export exiting the euphotic zone was based on size-partitioning of NPP, a copepod-dominated foodweb and a ratio of 0.2 (ALOHA) and 0.1 (K2) for algal:faecal particle flux. Predicted export was 20-22 mg POC m{sup -2} d{sup -1} at ALOHA (i.e. 10-11% NPP (0-125 m); 1.1-1.2 x export flux at 150 m (E{sub 150}). At K2, export was 111 mg C m{sup -2} d{sup -1} (21% NPP (0-50 m); 1.8 x E{sub 150}) and 33 mg POC m{sup -2} d{sup -1} (11% NPP, 0-55 m); 1.4 x E{sub 150}) for deployments 1 and 2, respectively. This decrease in predicted export at K2 matches the observed trend for E{sub 150}. Also, the low attenuation of export flux from 60 to 150 m is consistent with that between 150 to 500 m. This strong surface-subsurface coupling suggests that phytoplankton productivity and floristics play a key role at K2 in setting export flux, and moreover that pelagic particle transformations by grazers strongly influence

  11. Design for a Moore No. 1 1/2 lathe

    SciTech Connect

    Rhorer, R.L.

    1981-01-01

    To increase our capability to machine small spherical parts, we are designing an ultraprecision lathe based on a Moore No. 1 1/2 measuring machine. The machine is being designed for single axis cutting, utilizing an accurate rotary table for spherical cuts. This report summarizes the design and presents an error budget analysis for the design.

  12. Diffusion of 1-iodo-propane (1); air (2)

    NASA Astrophysics Data System (ADS)

    Winkelmann, J.

    This document is part of Subvolume A `Gases in Gases, Liquids and their Mixtures' of Volume 15 `Diffusion in Gases, Liquids and Electrolytes' of Landolt-Börnstein Group IV `Physical Chemistry'. It is part of the chapter of the chapter `Diffusion in Pure Gases' and contains data on diffusion of (1) 1-iodo-propane; (2) air

  13. Diffusion of 1-iodo-propane (1); helium (2)

    NASA Astrophysics Data System (ADS)

    Winkelmann, J.

    This document is part of Subvolume A `Gases in Gases, Liquids and their Mixtures' of Volume 15 `Diffusion in Gases, Liquids and Electrolytes' of Landolt-Börnstein Group IV `Physical Chemistry'. It is part of the chapter of the chapter `Diffusion in Pure Gases' and contains data on diffusion of (1) 1-iodo-propane; (2) helium

  14. Diffusion of 1-iodo-butane (1); helium (2)

    NASA Astrophysics Data System (ADS)

    Winkelmann, J.

    This document is part of Subvolume A `Gases in Gases, Liquids and their Mixtures' of Volume 15 `Diffusion in Gases, Liquids and Electrolytes' of Landolt-Börnstein Group IV `Physical Chemistry'. It is part of the chapter of the chapter `Diffusion in Pure Gases' and contains data on diffusion of (1) 1-iodo-butane; (2) helium

  15. 40 CFR 721.10435 - Phenol, 2-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)-.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 32 2013-07-01 2013-07-01 false Phenol, 2-(1-methyl-1-phenylethyl)-4... Significant New Uses for Specific Chemical Substances § 721.10435 Phenol, 2-(1-methyl-1-phenylethyl)-4-(1,1,3... chemical substance identified as phenol, 2-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)- (PMN...

  16. 40 CFR 721.10435 - Phenol, 2-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)-.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 31 2014-07-01 2014-07-01 false Phenol, 2-(1-methyl-1-phenylethyl)-4... Significant New Uses for Specific Chemical Substances § 721.10435 Phenol, 2-(1-methyl-1-phenylethyl)-4-(1,1,3... chemical substance identified as phenol, 2-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)- (PMN...

  17. Substrate interactions in dehalogenation of 1,2-dichloroethane, 1,2-dichloropropane, and 1,1,2-trichloroethane mixtures by Dehalogenimonas spp.

    PubMed

    Dillehay, Jacob L; Bowman, Kimberly S; Yan, Jun; Rainey, Fred A; Moe, William M

    2014-04-01

    When chlorinated alkanes are present as soil or groundwater pollutants, they often occur in mixtures. This study evaluated substrate interactions during the anaerobic reductive dehalogenation of chlorinated alkanes by the type strains of two Dehalogenimonas species, D. lykanthroporepellens and D. alkenigignens. Four contaminant mixtures comprised of combinations of the chlorinated solvents 1,2-dichloroethane (1,2-DCA), 1,2-dichloropropane (1,2-DCP), and 1,1,2-trichloroethane (1,1,2-TCA) were assessed for each species. Chlorinated solvent depletion and daughter product formation determined as a function of time following inoculation into anaerobic media revealed preferential dechlorination of 1,1,2-TCA over both 1,2-DCA and 1,2-DCP for both species. 1,2-DCA in particular was not dechlorinated until 1,1,2-TCA reached low concentrations. In contrast, both species concurrently dechlorinated 1,2-DCA and 1,2-DCP over a comparably large concentration range. This is the first report of substrate interactions during chlorinated alkane dehalogenation by pure cultures, and the results provide insights into the chlorinated alkane transformation processes that may be expected for contaminant mixtures in environments where Dehalogenimonas spp. are present. PMID:23990262

  18. Antineoplastic agents LXIV: 1,4-Bis(2'-chloroethyl)-1,4-diazabicyclo[2.2.1]heptane dihydrogen dimaleate.

    PubMed

    Pettit, G R; Gieschen, D P; Pettit, W E

    1979-12-01

    The 1,4-bis(2'-chloroethyl)-1,4-diazabicyclo[2.2.1]heptane dication (II) exhibits remarkable antineoplastic activity. Detailed evaluation of several dianion derivatives showed a curative response level against the murine P-388 lymphocytic leukemia, colon 26, CD8F1 mammary, and the Walker 256 carcinosarcoma (rat) tumor systems. In addition, significant cancer chemotherapeutic activity was found against the murine L-1210 lymphoid leukemia, colon 38, and B16 melanocarcinoma tumor systems. The bicyclo dication (II) first was isolated, evaluated, and stored as the diperchlorate derivative (IIa). Because of the promising anticancer activity of IIa, procedures were developed for obtaining other anion derivatives for comparative biological purposes. Several naturally occurring substances were evaluated, and the dihydrogen dimaleate derivative (IIi) obtained by an ion-exchange technique was the most suitable. PMID:529047

  19. Regulation of PHLDA1 Expression by JAK2-ERK1/2-STAT3 Signaling Pathway.

    PubMed

    Lyu, Ji Hyo; Huang, Bin; Park, Dae-Weon; Baek, Suk-Hwan

    2016-02-01

    Toll-like receptor 2 (TLR2)-mediated signaling cascades and gene regulation are mainly involved in diseases, such as immunity and inflammation. In this study, microarray analysis was performed using bone marrow-derived macrophages (BMDM) and Raw 264.7 cells to identify novel proteins involved in the TLR2-mediated cellular response. We found that pleckstrin homology-like domain family, member 1 (PHLDA1) is a novel gene up-regulated by TLR2 stimulation and determined the unique signaling pathway for its expression. Treatment with TLR2 agonist Pam3 CSK4 increased mRNA, protein, and fluorescence staining of PHLDA1. Induction of PHLDA1 by TLR2 stimulation disappeared from TLR2 KO mice-derived BMDM. Among janus kinase (JAK) family members, JAK2 was involved in TLR2-stimulated PHLDA1 expression. Signal transducer and activator of transcription 3 (STAT3) also participated in PHLDA1 expression downstream of the JAK2. Interestingly, ERK1/2 was an intermediate between JAK2 and STAT3. In silico analysis revealed the presence of highly conserved γ-activated sites within mouse PHLDA1 promoter and confirmed the JAK2-STAT3 pathway is important to Pam3 CSK4 -induced PHLDA1 transcription. These findings suggest that the JAK2-ERK1/2-STAT3 pathway is an important signaling pathway for PHLDA1 expression and that these proteins may play a critical role in eliciting TLR2-mediated immune and inflammatory response. PMID:26239656

  20. 26 CFR 1.851-2 - Limitations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... TAXES Regulated Investment Companies and Real Estate Investment Trusts § 1.851-2 Limitations. (a... manufacturing or of any other general classification of industry, but issuers shall be construed to be...

  1. 2 CFR 1.110 - Issuing authorities.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... THE CODE OF FEDERAL REGULATIONS AND SUBTITLE A Introduction to Title 2 of the CFR § 1.110 Issuing authorities. OMB issues this subtitle. Each Federal agency that has a chapter in subtitle B of this...

  2. 2 CFR 1.110 - Issuing authorities.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... THE CODE OF FEDERAL REGULATIONS AND SUBTITLE A Introduction to Title 2 of the CFR § 1.110 Issuing authorities. OMB issues this subtitle. Each Federal agency that has a chapter in subtitle B of this...

  3. 2 CFR 1.110 - Issuing authorities.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... THE CODE OF FEDERAL REGULATIONS AND SUBTITLE A Introduction to Title 2 of the CFR § 1.110 Issuing authorities. OMB issues this subtitle. Each Federal agency that has a chapter in subtitle B of this...

  4. 2 CFR 1.110 - Issuing authorities.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... THE CODE OF FEDERAL REGULATIONS AND SUBTITLE A Introduction to Title 2 of the CFR § 1.110 Issuing authorities. OMB issues this subtitle. Each Federal agency that has a chapter in subtitle B of this...

  5. The SIR-2 Experiment on Chandrayaan-1

    NASA Astrophysics Data System (ADS)

    Mall, U.; Nathues, A.; SIR-2 Collaboration

    2009-04-01

    The SIR-2 experiment, flying on the Indian Chandrayaan-1 mission to the Moon, is a near-infrared point spectrometer of the second-generation built by a European collaboration around the Max-Planck Institute for Solar System Research. SIR-2 has been designed based on the heritage of the SIR Technology experiment on ESA's SMART-1 mission, in order to investigate the mineralogical composition of the Moon for a period of two years. The SIR-2 instrument, which will operate in conjunction with the Indian Hyper-Spectral Imaging spectrometer (HySI) on board Chandrayaan-1, will cover, together with HySi, a combined spectral range of 0.4 to 2.4 m. We will explain the SIR-2 experiment and report on the performance of the instrument during its commissioning phase to deliver high spatial and spectral near-infrared data from its first 100 km polar orbits around the Moon.

  6. Vought SB2U-1 Vindicator

    NASA Technical Reports Server (NTRS)

    1938-01-01

    Vought SB2U-1 Vindicator: This Vought SB2U-1 Vindicator was acquired for one month in late 1938 from NAS Anacostia, Washington, D. C. Anacostia was the source of many of the naval aircraft flown by the NACA, in part due to its proximity and in part became it was the Navy's flight test base. The nose slot cowling was aimed at improving engine cooling.

  7. The structural diversity of ABS{sub 3} compounds with d{sup 0} electronic configuration for the B-cation

    SciTech Connect

    Brehm, John A. Bennett, Joseph W.; Schoenberg, Michael Rutenberg; Grinberg, Ilya; Rappe, Andrew M.

    2014-06-14

    We use first-principles density functional theory within the local density approximation to ascertain the ground state structure of real and theoretical compounds with the formula ABS{sub 3} (A = K, Rb, Cs, Ca, Sr, Ba, Tl, Sn, Pb, and Bi; and B = Sc, Y, Ti, Zr, V, and Nb) under the constraint that B must have a d{sup 0} electronic configuration. Our findings indicate that none of these AB combinations prefer a perovskite ground state with corner-sharing BS{sub 6} octahedra, but that they prefer phases with either edge- or face-sharing motifs. Further, a simple two-dimensional structure field map created from A and B ionic radii provides a neat demarcation between combinations preferring face-sharing versus edge-sharing phases for most of these combinations. We then show that by modifying the common Goldschmidt tolerance factor with a multiplicative term based on the electronegativity difference between A and S, the demarcation between predicted edge-sharing and face-sharing ground state phases is enhanced. We also demonstrate that, by calculating the free energy contribution of phonons, some of these compounds may assume multiple phases as synthesis temperatures are altered, or as ambient temperatures rise or fall.

  8. The frustrated fcc antiferromagnet Ba2 YOsO6: Structural characterization, magnetic properties and neutron scattering studies

    SciTech Connect

    Kermarrec, E.; Marjerrison, Casey A.; Thompson, C. M.; Maharaj, Dalini D.; Levin, K.; Kroeker, S.; Granroth, Garrett E.; Flacau, Roxana; Yamani, Zahra; Greedan, John E.; Gaulin, Bruce D.

    2015-02-26

    Here we report the crystal structure, magnetization, and neutron scattering measurements on the double perovskite Ba2 YOsO6. The Fm$\\bar{3}$m space group is found both at 290 K and 3.5 K with cell constants a0=8.3541(4) Å and 8.3435(4) Å, respectively. Os5+ (5d>3) ions occupy a nondistorted, geometrically frustrated face-centered-cubic (fcc) lattice. A Curie-Weiss temperature θ ~₋700 K suggests the presence of a large antiferromagnetic interaction and a high degree of magnetic frustration. A magnetic transition to long-range antiferromagnetic order, consistent with a type-I fcc state below TN~69 K, is revealed by magnetization, Fisher heat capacity, and elastic neutron scattering, with an ordered moment of 1.65(6) μB on Os5+. The ordered moment is much reduced from either the expected spin-only value of ~3 μB or the value appropriate to 4d>3 Ru5+ in isostructural Ba2 YRuO6 of 2.2(1) μB, suggesting a role for spin-orbit coupling (SOC). Triple-axis neutron scattering measurements of the order parameter suggest an additional first-order transition at T=67.45 K, and the existence of a second-ordered state. We find time-of-flight inelastic neutron results reveal a large spin gap Δ~17 meV, unexpected for an orbitally quenched, d>3 electronic configuration. In conclusion, we discuss this in the context of the ~5 meV spin gap observed in the related Ru5+,4d>3 cubic double perovskite Ba2YRuO6, and attribute the ~3 times larger gap to stronger SOC present in this heavier, 5d, osmate system.

  9. Analysis of the 3d(sup 6)4s((sup 6)D)4f-5g supermultiplet of Fe I in laboratory and solar infrared spectra

    NASA Technical Reports Server (NTRS)

    Johansson, S.; Nave, G.; Geller, M.; Sauval, A. J.; Grevesse, N.; Schoenfeld, W. G.; Change, E. S.; Farmer, C. B.

    1994-01-01

    The combined laboratory and solar analysis of the highly excited subconfigurations 3d(sup 6)4s((sup 6)D)4f and 3d(sup 6)4s((sup 6)D)5g of Fe I has allowed us to classify 87 lines of the 4f-5g supermultiplet in the spectral region 2545-2585 per cm. The level structure of these JK-coupled configurations is predicted by semiempirical calculations and the quardrupolic approximation. Semiempirical gf-values have been calculated and are compared to gf-values derived from the solar spectrum. The solar analysis has shown that these lines, which should be much less sensitive than lower excitation lines to departures from Local Thermal Equilibrium (LTE) and to temperature uncertanties, lead to a solar abundance of iron which is consistent with the meteoritic value (A(sub Fe) = 7.51).

  10. Phylogenetic aspects of nucleobindin-2/nesfatin-1.

    PubMed

    Mohan, Haneesha; Unniappan, Suraj

    2013-01-01

    Nesfatin-1 is an eighty two amino acid, naturally occurring multifunctional protein encoded in the precursor nucleobindin-2 (NUCB2). A comparison of sequences indicates that NUCB2 is present in a number of animals, from hydra to humans. The 30 amino acid mid-segment of nesfatin-1 is considered to be the bioactive core of the protein, and this region displays the highest identity among nesfatin-1 sequences reported thus far. Similar to the sequence relationships observed, the tissue-specific expression and biological actions of nesfatin-1 also appear to be highly conserved across species. For example, brain is a major tissue abundantly expressing nesfatin- 1 in several species. It has been shown that various key regions of the rat, mouse and goldfish brain, which are involved in the regulation of feeding and metabolism express nesfatin-1. Exogenous administration of nesfatin-1 results in a decrease in the food intake of rats, mice and goldfish. In addition, nesfatin-1 has been shown to regulate a number of other physiological processes including hormone secretion from the pancreatic islets and pituitary gland, stress and behavior. While nesfatin-1 research still remains an emerging area in physiology, the literature available thus far clearly shows that nesfatin-1 is an important regulator of homeostasis in animals. PMID:23537083

  11. 78 FR 76857 - 1,1,1,2-Tetrafluoroethane From China; Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-19

    ... Register of October 28, 2013 (78 FR 64243). The conference was held in Washington, DC, on November 12, 2013... COMMISSION 1,1,1,2-Tetrafluoroethane From China; Determinations On the basis of the record \\1\\ developed in... injured by reason of imports from China of 1,1,1,2- Tetrafluoroethane, provided for in subheading...

  12. 78 FR 79007 - 1,1,1,2-Tetrafluoroethane From China

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-27

    ... the notice in the Federal Register of October 28, 2013 (78 FR 64243). The conference was held in... COMMISSION 1,1,1,2-Tetrafluoroethane From China Determinations On the basis of the record \\1\\ developed in... reason of imports from China of 1,1,1,2- Tetrafluoroethane, provided for in subheadings 2903.39.20 of...

  13. Eddy covariance observations of surface leakage during shallow subsurface CO2 releases

    SciTech Connect

    Lewicki, J. L.; Hilley, G.E.; Fischer, M.L.; Pan, L.; Oldenburg, C.M.; Dobeck, L.; Spangler, L.

    2009-04-01

    We tested the ability of eddy covariance (EC) to detect, locate, and quantify surface CO{sub 2} flux leakage signals within a background ecosystem. For 10 days starting on 07/09/2007, and for seven days starting on 08/03/2007, 0.1 (Release 1) and 0.3 (Release 2) t CO{sub 2}d{sup -1}, respectively, were released from a horizontal well {approx}100 m in length and {approx}2.5 m in depth located in an agricultural field in Bozeman, MT. An EC station measured net CO{sub 2} flux (F{sub c}) from 06/08/2006 to 09/04/2006 (mean and standard deviation = -12.4 and 28.1 g m{sup -2} d{sup -1}, respectively) and from 05/28/2007 to 09/04/2007 (mean and standard deviation = -12.0 and 28.1 g m{sup -2} d{sup -1}, respectively). The Release 2 leakage signal was visible in the F{sub c} time series, whereas the Release 1 signal was difficult to detect within variability of ecosystem fluxes. To improve detection ability, we calculated residual fluxes (F{sub cr}) by subtracting fluxes corresponding to a model for net ecosystem exchange from F{sub c}. F{sub cr} had reduced variability and lacked the negative bias seen in corresponding F{sub c} distributions. Plotting the upper 90th percentile F{sub cr} versus time enhanced the Release 2 leakage signal. However, values measured during Release 1 fell within the variability assumed to be related to unmodeled natural processes. F{sub cr} measurements and corresponding footprint functions were inverted using a least-squares approach to infer the spatial distribution of surface CO{sub 2} fluxes during Release 2. When combined with flux source area evaluation, inversion results roughly located the CO{sub 2} leak, while resolution was insufficient to quantify leakage rate.

  14. Diffusion of air (1); furan-2-yl-methanethiol (2)

    NASA Astrophysics Data System (ADS)

    Winkelmann, J.

    This document is part of Subvolume A `Gases in Gases, Liquids and their Mixtures' of Volume 15 `Diffusion in Gases, Liquids and Electrolytes' of Landolt-Börnstein Group IV `Physical Chemistry'. It is part of the chapter of the chapter `Diffusion in Pure Gases' and contains data on diffusion of (1) air; (2) furan-2-yl-methanethiol

  15. Diffusion of 2-iodo-propane (1); helium (2)

    NASA Astrophysics Data System (ADS)

    Winkelmann, J.

    This document is part of Subvolume A `Gases in Gases, Liquids and their Mixtures' of Volume 15 `Diffusion in Gases, Liquids and Electrolytes' of Landolt-Börnstein Group IV `Physical Chemistry'. It is part of the chapter of the chapter `Diffusion in Pure Gases' and contains data on diffusion of (1) 2-iodo-propane; (2) helium

  16. Diffusion of 2-iodo-butane (1); helium (2)

    NASA Astrophysics Data System (ADS)

    Winkelmann, J.

    This document is part of Subvolume A `Gases in Gases, Liquids and their Mixtures' of Volume 15 `Diffusion in Gases, Liquids and Electrolytes' of Landolt-Börnstein Group IV `Physical Chemistry'. It is part of the chapter of the chapter `Diffusion in Pure Gases' and contains data on diffusion of (1) 2-iodo-butane; (2) helium

  17. Diffusion of 2-iodo-propane (1); air (2)

    NASA Astrophysics Data System (ADS)

    Winkelmann, J.

    This document is part of Subvolume A `Gases in Gases, Liquids and their Mixtures' of Volume 15 `Diffusion in Gases, Liquids and Electrolytes' of Landolt-Börnstein Group IV `Physical Chemistry'. It is part of the chapter of the chapter `Diffusion in Pure Gases' and contains data on diffusion of (1) 2-iodo-propane; (2) air

  18. 2 CFR 1.110 - Issuing authorities.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Grants and Agreements ABOUT TITLE 2 OF THE CODE OF FEDERAL REGULATIONS AND SUBTITLE A Introduction to Title 2 of the CFR § 1.110 Issuing authorities. OMB issues this subtitle. Each Federal agency that has a chapter in subtitle B of this title issues that chapter....

  19. Science Curriculum Guide, Levels 1 and 2.

    ERIC Educational Resources Information Center

    Newark School District, DE.

    The first two of four levels in a K-12 science curriculum are outlined. In Level 1 (grades K-2) and Level 2 (grades 3-5), science areas include the study of living things, matter and energy, and solar system and universe. Conveniently listed are page locations for educational and instructional objectives, cross-referenced to science area and coded…

  20. 41 CFR 51-2.1 - Membership.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... COMMITTEE FOR PURCHASE FROM PEOPLE WHO ARE BLIND OR SEVERELY DISABLED 2-COMMITTEE FOR PURCHASE FROM PEOPLE WHO ARE BLIND OR SEVERELY DISABLED § 51-2.1 Membership. Under the JWOD Act, the Committee is composed... conversant with the problems incident to the employment of blind individuals; one who is conversant with...

  1. 26 CFR 1.355-2 - Limitations.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...-2T(i), as contained in 26 CFR part 1, revised as of April 1, 2011. .... Corporation X is engaged in the manufacture and sale of toys and the manufacture and sale of candy. The shareholders of X wish to protect the candy business from the risks and vicissitudes of the toy...

  2. 26 CFR 1.355-2 - Limitations.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...-2T(i), as contained in 26 CFR part 1, revised as of April 1, 2011. .... Corporation X is engaged in the manufacture and sale of toys and the manufacture and sale of candy. The shareholders of X wish to protect the candy business from the risks and vicissitudes of the toy...

  3. 26 CFR 1.355-2 - Limitations.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...-2T(i), as contained in 26 CFR part 1, revised as of April 1, 2011. .... Corporation X is engaged in the manufacture and sale of toys and the manufacture and sale of candy. The shareholders of X wish to protect the candy business from the risks and vicissitudes of the toy...

  4. 15 CFR 287.2 - Definitions. 1

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... STANDARDS AND TECHNOLOGY, DEPARTMENT OF COMMERCE ACCREDITATION AND ASSESSMENT PROGRAMS GUIDANCE ON FEDERAL CONFORMITY ASSESSMENT § 287.2 Definitions. 1 1 Definitions of accreditation, certification, conformity... person meets requirements defined in a specific section(s) of the CFR. The referenced section(s)...

  5. 15 CFR 287.2 - Definitions. 1

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... STANDARDS AND TECHNOLOGY, DEPARTMENT OF COMMERCE ACCREDITATION AND ASSESSMENT PROGRAMS GUIDANCE ON FEDERAL CONFORMITY ASSESSMENT § 287.2 Definitions. 1 1 Definitions of accreditation, certification, conformity... person meets requirements defined in a specific section(s) of the CFR. The referenced section(s)...

  6. 15 CFR 287.2 - Definitions. 1

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... STANDARDS AND TECHNOLOGY, DEPARTMENT OF COMMERCE ACCREDITATION AND ASSESSMENT PROGRAMS GUIDANCE ON FEDERAL CONFORMITY ASSESSMENT § 287.2 Definitions. 1 1 Definitions of accreditation, certification, conformity... person meets requirements defined in a specific section(s) of the CFR. The referenced section(s)...

  7. 15 CFR 287.2 - Definitions. 1

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... STANDARDS AND TECHNOLOGY, DEPARTMENT OF COMMERCE ACCREDITATION AND ASSESSMENT PROGRAMS GUIDANCE ON FEDERAL CONFORMITY ASSESSMENT § 287.2 Definitions. 1 1 Definitions of accreditation, certification, conformity... person meets requirements defined in a specific section(s) of the CFR. The referenced section(s)...

  8. Bis(2-chloro-1-methylethyl) ether

    Integrated Risk Information System (IRIS)

    Bis ( 2 - chloro - 1 - methylethyl ) ether ; CASRN 108 - 60 - 1 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assess

  9. MISR Level 1B2 Terrain Data (MI1B2T_V2)

    NASA Technical Reports Server (NTRS)

    Diner, David J. (Principal Investigator)

    The MISR instrument consists of nine pushbroom cameras which measure radiance in four spectral bands. Global coverage is achieved in nine days. The cameras are arranged with one camera pointing toward the nadir, four cameras pointing forward and four cameras pointing aftward. It takes 7 minutes for all nine cameras to view the same surface location. The view angles relative to the surface reference ellipsoid, are 0, 26.1, 45.6, 60.0, and 70.5 degrees. The spectral band shapes are nominally gaussian, centered at 443, 555, 670, and 865 nm. The Terrain data are re-projected to the terrain altitude. In this product, surface data from all cameras will appear in the same geographic location. Thus, this product is the primary input to Level 2 aerosol/surface processing, which requires co-registration of the L1B2 imagery at the surface. Clouds will still be displaced due to their elevation above the surface, but this time with respect to the terrain rather than the ellipsoid. (The mountain location T is now assigned the geographic location at T, and the Cloud at F appears at the geographic location T.) In Level 2 aerosol/surface processing, algorithms are applied to screen out the clouds. Terrain data only exist for MISR blocks containing some land. [Location=GLOBAL LAND] [Temporal_Coverage: Start_Date=2000-02-24; Stop_Date=] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Latitude_Resolution=563.2 km (cross-track); Longitude_Resolution=140.8 km (along-track).; Temporal_Resolution=about 15 orbits/day; Temporal_Resolution_Range=about 15 orbits/day].

  10. The NUHM2 after LHC Run 1

    DOE PAGESBeta

    Buchmueller, O.; Cavanaugh, R.; Citron, M.; De Roeck, A.; Dolan, M. J.; Ellis, J. R.; Flächer, H.; Heinemeyer, S.; Malik, S.; Marrouche, J.; et al

    2014-12-17

    We make a frequentist analysis of the parameter space of the NUHM2, in which the soft supersymmetry (SUSY)-breaking contributions to the masses of the two Higgs multiplets, m2Hu,d, vary independently from the universal soft SUSY-breaking contributions m20 to the masses of squarks and sleptons. Our analysis uses the MultiNest sampling algorithm with over 4 × 10⁸ points to sample the NUHM2 parameter space. It includes the ATLAS and CMS Higgs mass measurements as well as the ATLAS search for supersymmetric jets + /ET signals using the full LHC Run 1 data, the measurements of BR(Bs→μ⁺μ⁻) by LHCb and CMS togethermore » with other B-physics observables, electroweak precision observables and the XENON100 and LUX searches for spin-independent dark-matter scattering. We find that the preferred regions of the NUHM2 parameter space have negative SUSY-breaking scalar masses squared at the GUT scale for squarks and sleptons, m20 < 0, as well as m2Hu < m2Hd < 0. The tension present in the CMSSM and NUHM1 between the supersymmetric interpretation of (g – 2)μ and the absence to date of SUSY at the LHC is not significantly alleviated in the NUHM2. We find that the minimum χ2 = 32.5 with 21 degrees of freedom (dof) in the NUHM2, to be compared with χ2/dof = 35.0/23 in the CMSSM, and χ2/dof = 32.7/22 in the NUHM1. We find that the one-dimensional likelihood functions for sparticle masses and other observables are similar to those found previously in the CMSSM and NUHM1.« less

  11. IRIS Toxicological Review of 1,1,2,2-Tetrachloroethane (External Review Draft)

    EPA Science Inventory

    EPA is conducting a peer review of the scientific basis supporting the human health hazard and dose-response assessment of 1,1,2,2-tetrachloroethane that will appear on the Integrated Risk Information System (IRIS) database.

  12. 1 and 2-Dimensional Line Transfer Package

    1990-07-01

    LXF1D is a one dimensional steady-state line transfer package designed to handle: overlapping and or interacting lines, planar, cylindrical, spherical (and special) geometries, doppler shifts, complete redistribution (CRD), partial redistribution (PRD). PRD requires the use of REDIST or some other package to produce emission profiles. LXF2D is a two dimensional version of LXF1D for xy and rz geometries. Both LXF1D and LXF2D are designed to be added to existing non-local thermodynamic equilibrium (NLTE) codes withmore » a minimum of effort.« less

  13. 49 CFR 172.522 - EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3 placards.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 2 2013-10-01 2013-10-01 false EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3... INFORMATION, TRAINING REQUIREMENTS, AND SECURITY PLANS Placarding § 172.522 EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3 placards. (a) Except for size and color, the EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES...

  14. 49 CFR 172.522 - EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3 placards.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 2 2011-10-01 2011-10-01 false EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3... INFORMATION, TRAINING REQUIREMENTS, AND SECURITY PLANS Placarding § 172.522 EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3 placards. (a) Except for size and color, the EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES...

  15. 49 CFR 172.522 - EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3 placards.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3... INFORMATION, TRAINING REQUIREMENTS, AND SECURITY PLANS Placarding § 172.522 EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3 placards. (a) Except for size and color, the EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES...

  16. 49 CFR 172.522 - EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3 placards.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 2 2014-10-01 2014-10-01 false EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3... INFORMATION, TRAINING REQUIREMENTS, AND SECURITY PLANS Placarding § 172.522 EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES 1.3 placards. (a) Except for size and color, the EXPLOSIVES 1.1, EXPLOSIVES 1.2 and EXPLOSIVES...

  17. T2 can be greater than 2T1

    NASA Astrophysics Data System (ADS)

    Sevian, H. M.; Skinner, J. L.

    1989-08-01

    We consider a quantum-mechanical two-level system under the influence of both diagonal and off-diagonal stochastic perturbations, and focus on the decay times T1 and T2, which refer to the relaxation to equilibrium of the populations and relative phase of the two levels, respectively. From both theoretical and experimental viewpoints one traditionally expects that T22T1. On the other hand, from a fourth-order cumulant expansion calculation of the asymptotic time dependence of the density matrix elements, Budimir and Skinner [J. Stat. Phys. 49, 1029 (1987)] showed that, in fact, in some instances T2>2T1. In this paper we solve the stochastic model numerically, which leads to the exact time dependence of the density matrix at all times. We find that the analytic prediction that T2>2T1 is not only correct, but also meaningful, in the sense that the density matrix elements decay exponentially after only a short transient time.

  18. The 1:1 adduct of caffeine and 2-(1,3-dioxoisoindolin-2-yl)acetic acid

    PubMed Central

    Bhatti, Moazzam H.; Yunus, Uzma; Saeed, Sohail; Shah, Syed Raza; Wong, Wing-Tak

    2011-01-01

    In the crystal structure of the title adduct [systematic name: 2-(1,3-dioxoisoindolin-2-yl)acetic acid–1,3,7-trimethyl-1,2,3,6-tetra­hydro-7H-purine-2,6-dione (1/1)], C8H10N4O2·C10H7NO4, the components are linked by an O—H⋯N hydrogen-bond and no proton transfer occurs. PMID:22058908

  19. Effect of B-Ions Substitution in [(K1/2Bi1/2)-(Na1/2Bi1/2)](Ti-B)O3 System with B=Zr, Fe1/2Nb1/2, Zn1/3Nb2/3 or Mg1/3Nb2/3

    NASA Astrophysics Data System (ADS)

    Yamada, Yasuyuki; Akutsu, Tatsuya; Asada, Hiroshi; Nozawa, Koji; Hachiga, Shinji; Kurosaki, Takeshi; Ikagawa, Osamu; Fujiki, Hiroyuki; Hozumi, Katsuhiro; Kawamura, Takeshi; Amakawa, Takashi; Hirota, Ken-ichi; Ikeda, Takuro

    1995-09-01

    Phase relationship in the [(K1/2Bi1/2)1- y(Na1/2Bi1/2) y](Ti1- xB x)O3 system with B=Zr, Fe1/2Nb1/2, Zn1/3Nb2/3 or Mg1/3Nb2/3 has been investigated by dielectric measurement and X-ray diffractometry. All of the bi-binary systems were solid-soluble throughout the entire composition range. With increasing y and x, ferroelectric Curie point decreased and the ɛ-T curve became flat. Composition dependence of the transition temperature was examined by varying x or y. Phase diagrams were mostly determined at room temperature on square diagrams except for a restricted area in the vicinity of (Na1/2B1/2)ZrO3, which involved a tetragonally distorted phase and could not be accounted for. The ferroelectric tetragonal phase was confined within a narrow range of x<0.1 and the rhombohedral phase was dominant in all of the systems studied here.

  20. DOE-2 supplement: Version 2.1E

    SciTech Connect

    Winkelmann, F.C.; Birdsall, B.E.; Buhl, W.F.; Ellington, K.L.; Erdem, A.E.; Hirsch, J.J.; Gates, S.

    1993-11-01

    This publication updates the DOE-2 Supplement form version 2.1D to version to 2.1E. It contains detailed discussions and instructions for using the features and enhancements introduced into the 2.1B, 2.1C, 2.1D, and 2.1E versions of the program. The building description section contains information on input functions in loads and systems, hourly report frequencies, saving files of hourly output for post processing, sharing hourly report data among program modules, the metric option, and input macros and general library features. The loads section contains information on sunspaces, sunspace modeling, window management and solar radiation, daylighting, trombe walls, fixed shades, fins and overhangs, shade schedules, self shades, heat distribution from lights, the Sherman-Grimsrud infiltrations method. terrain and height modification to wind speed, floor multipliers and interior wall types, improved exterior infrared radiation loss calculation, improved outside air film conductance calculation, window library, window frames, and switchable glazing. The systems section contains information on energy end use and meters, powered induction units, a packaged variable volume -- variable temperature system, a residential variable volume -- variable temperature system, air source heat pump enhancements, water loop heat pump enhancements, variable speed electric heat pump, gas heat pumps, hot water heaters, evaporative cooling, total gas solid-desiccant systems, add on desiccant cooling, water cooled condensers, evaporative precoolers outside air economizer control, optimum fan start, heat recovery from refrigerated case work, night ventilation, baseboard heating, moisture balance calculations, a residential natural ventilation algorithm, improved cooling coil model, system sizing and independent cooling and heating sizing ratios. The plant section contains information on energy meters, gas fired absorption chillers, engine driven compressor chillers, and ice energy storage.

  1. Regio- and Stereoselective [2+2] Photodimerization of 3-Substituted 2-Alkoxy-2-oxo-2H-1,2-Benzoxaphosphorines

    SciTech Connect

    Nikolova, Rositca D.; Vayssilov, Georgi; Rodios, Nestor; Bojilova, Anka

    2002-05-31

    Diethyl 1,2-benzoxaphosphorine-3-carboxylates 5 undergo a regio- and stereoselective [2+2] photodimerization reaction in methanol solution under the action of sunlight, giving in all cases the corresponding anti head-to-tail dimers 6 and 7. Concerning the stereogenic P atom, the photodimerization is also stereoselective, and the centrosymmetric stereoisomer 6 predominates over the non symmetric P-epimer 7.

  2. MISR Level 1A CCD, 1B1, 1B2, and Browse Products

    Atmospheric Science Data Center

    2013-04-01

    ... Mode L1B2 data processing. Added ProductVersion Attribute to metadata of all products. New ancillary files: ... and AN data, as well as Band-to-Band transform fix. ROI Image Matching improvements to blunder detection algorithm and to Image Coordinate Correction. New ancillary files: ...

  3. Reaction of 1,2,4-triazole-3-thiones with 1-chloro-2,3-epoxypropane

    SciTech Connect

    Trzhtsinskaya, B.V.; Kositsyna, E.I.; Pertsikov, B.Z.; Rudakova, E.V.; Voronov, V.K.; Skvortsova, G.G.

    1987-08-01

    Addition of 1-chloro-2,3-epoxypropane to 1,2,4-triazole-3-thiones depending on the ratio of the reactants leads to the formation of 3-(1-chloro-2-hydroxypropyl)-3-(1-chloro-2-hydroxypropylthio)-1,2,4-triazoles. 3-Hydroxy-1,2,4-triazolo(2,3-b) tetrahydro-1,3-triazines have been synthesized by intramolecular cyclization of the monoadducts. IR spectra were recorded on a Specord 75-IR instrument as a thin layer, in KBr pellets, an in chloroform solution; PMR spectra were recorded on a Tesla BS-497 instrument (100 MHz) at 20/sup 0/C in CD/sub 3/OD with TMS as internal standard.

  4. MISR Level 1B2 Ellipsoid Data (MI1B2E_V2)

    NASA Technical Reports Server (NTRS)

    Diner, David J. (Principal Investigator)

    The MISR instrument consists of nine pushbroom cameras which measure radiance in four spectral bands. Global coverage is achieved in nine days. The cameras are arranged with one camera pointing toward the nadir, four cameras pointing forward and four cameras pointing aftward. It takes 7 minutes for all nine cameras to view the same surface location. The view angles relative to the surface reference ellipsoid, are 0, 26.1, 45.6, 60.0, and 70.5 degrees. The spectral band shapes are nominally gaussian, centered at 443, 555, 670, and 865 nm. The Ellipsoid product is referenced to the World Geodetic System 1984 (WGS84) ellipsoid, which approximates the Earth's shape at sea level. In this product, the radiances and associated altitudes are projected to the ellipsoid, so that higher elevation data appear displaced from their true location for non-nadir camera views, much as they are seen by the instrument. (A cloud at location F, or a mountain top at location T in the image below appears as if it is at location E.) The more oblique the camera view, or the higher in altitude the feature, the more displaced the elevated data will appear. This displacement is used to advantage in MISR stereo retrievals, and this product is the primary input to Level 2 top-of-atmosphere/cloud processing. [Location=GLOBAL] [Temporal_Coverage: Start_Date=2000-02-24; Stop_Date=] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Latitude_Resolution=563.2 km (cross-track); Longitude_Resolution=140.8 km (along-track); Horizontal_Resolution_Range=500 meters - < 1 km; Temporal_Resolution=about 15 orbits/day; Temporal_Resolution_Range=about 15 orbits/day].

  5. Grignard-mediated reduction of 2,2,2-trichloro-1-arylethanones.

    PubMed

    Essa, Ali H; Lerrick, Reinner I; Çiftçi, Eçe; Harrington, Ross W; Waddell, Paul G; Clegg, William; Hall, Michael J

    2015-05-28

    2,2,2-Trichloro-1-aryl-ethanones can be reduced by RMgX to the corresponding 2,2-dichloro-1-arylethen-1-olates and trapped with a range of electrophiles resulting in either reduction, reduction/aldol, reduction/Claisen condensation or reduction/aldol-Tishchenko products. In addition we demonstrate that 2,2-dichloro-1-arylethen-1-olates undergo counter-ion controlled Darzens condensations, which can be followed by a thermal rearrangement as a route to 1,3-diaryl-3-chloropropane-1,2-diones. PMID:25906144

  6. Surface tension for 1,1,1-trifluorethane (R-143a), 1,1,1,2-tetrafluoroethane (R-134a), 1,1-dichloro-2,2,3,3,3-pentafluoropropane (R-225ca), and 1,3-dichloro-1,2,2,3,3-pentafluoropropane (R-225cb)

    SciTech Connect

    Higashi, Yukihiro; Shibata, Takahide; Okada, Masaaki

    1997-05-01

    The surface tensions for 1,1,1-trifluoroethane (R-143a), 1,1,1,2-tetrafluoroethane (R-134a), 1,1-dichloro-2,2,3,3,3-pentafluoropropane (R-225ca), and 1,3-dichloro-1,2,2,3,3-pentafluoropropane (R-225cb) have been measured by the differential capillary rise method. The results were obtained in the temperature range between 273 K and 343 K. The experimental uncertainties of temperature and surface tension are estimated to be within {+-}20 mK and {+-}0.15 mN/m, respectively. A correlation for the surface tension as a function of temperature is presented.

  7. Observation of new resonances decaying to $D\\pi$ and $D^*\\pi$ in inclusive $e^ e^-$ collisions near $\\sqrt{s}

    SciTech Connect

    del Amo Sanchez, P.; Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Martinelli, M.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Battaglia, M.; Brown, David Nathan; Hooberman, B.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; Osipenkov, I.L.; Tanabe, T.; /more authors..

    2010-09-14

    The authors present a study of the D{sup +}{pi}{sup -}, D{sup 0}{pi}{sup +}, and D*{sup +}{pi}{sup -} systems in inclusive e{sup +}e{sup -} {yields} c{bar c} interactions in a search for new excited D meson states. they use a dataset, consisting of {approx} 454 fb{sup -1}, collected at center-of-mass energies near 10.58 GeV by the BABAR detector at the SLAC PEP-II asymmetric-energy collider. They observe, for the first time, candidates for the radial excitations of the D{sup 0}, D*{sup 0}, and D*{sup +}, as well as the L = 2 excited states of the D{sup 0} and D{sup +}, where L is the orbital angular momentum of the quarks.

  8. Ca{sub 2}Cr{sub 0.5}Ga{sub 1.5}O{sub 5}—An extremely redox-stable brownmillerite phase

    SciTech Connect

    Luo, Kun; Amano Patino, Midori; Hayward, Michael A.

    2015-02-15

    Investigation of the Ca{sub 2}Cr{sub x}Ga{sub 2−x}O{sub 5} compositional series reveals a maximum chromium solubility of 25%. The most chromium rich composition, Ca{sub 2}Cr{sub 0.5}Ga{sub 1.5}O{sub 5}, adopts a brownmillerite-type anion deficient perovskite structure described in space group Pnma (a=5.368 Å, b=14.547 Å, c=5.593 Å). Neutron powder diffraction data reveals rigorous B-site cation order, with all of the tetrahedral coordination sites occupied exclusively by gallium and the octahedral coordination sites occupied by gallium or chromium. Annealing studies reveals Ca{sub 2}Cr{sub 0.5}Ga{sub 1.5}O{sub 5} is stable in both oxidizing (100% O{sub 2}) and reducing (5% H{sub 2} in N{sub 2}) conditions up to 800 °C, suggesting it could find application as a stable host lattice for fuel cell electrodes or electrolytes with suitable doping to enhance catalytic behaviour and/or anionic conductivity. - Graphical abstract: Ca{sub 2}Cr{sub 0.5}Ga{sub 1.5}O{sub 5}, adopts a brownmillerite-type anion deficient perovskite structure yet it is stable in both oxidizing (100% O{sub 2}) and reducing (5% H{sub 2} in N{sub 2}) conditions up to 800 °C. - Highlights: • Anion deficient oxide stable to both oxidation and reduction up to 800 °C. • Cation-ordered brownmillerite structure determined by powder neutron diffraction. • Low solubility of Cr{sup 3+} in framework due to spherical d{sup 3} electron configuration.

  9. Spin-1/2 Optical Lattice Clock

    SciTech Connect

    Lemke, N. D.; Ludlow, A. D.; Barber, Z. W.; Fortier, T. M.; Diddams, S. A.; Jiang, Y.; Jefferts, S. R.; Heavner, T. P.; Parker, T. E.; Oates, C. W.

    2009-08-07

    We experimentally investigate an optical clock based on {sup 171}Yb (I=1/2) atoms confined in an optical lattice. We have evaluated all known frequency shifts to the clock transition, including a density-dependent collision shift, with a fractional uncertainty of 3.4x10{sup -16}, limited principally by uncertainty in the blackbody radiation Stark shift. We measured the absolute clock transition frequency relative to the NIST-F1 Cs fountain clock and find the frequency to be 518 295 836 590 865.2(0.7) Hz.

  10. 2 1/2 -D compressible reconnection model

    NASA Astrophysics Data System (ADS)

    Skender, M.; Vršnak, B.

    The exact solution of the jump conditions on the RD/SMS discontinuity system in a two-and-half-dimensional (2 1/2 -D) symmetrical reconnection model enables one to analyse the outflowing jet characteristics in dependence on the inflow velocity, and to follow changes in transition to the two-dimensional model. Implications arising from the exact solution and its relevance for solar flares are discussed.

  11. A series of substituted (2E)-3-(2-fluoro-4-phenoxyphenyl)-1-phenylprop-2-en-1-ones.

    PubMed

    Chopra, Deepak; Mohan, T P; Vishalakshi, B; Row, T N Guru

    2007-12-01

    In the molecular structures of a series of substituted chalcones, namely (2E)-3-(2-fluoro-4-phenoxyphenyl)-1-phenylprop-2-en-1-one, C21H15FO2, (I), (2E)-3-(2-fluoro-4-phenoxyphenyl)-1-(4-fluorophenyl)prop-2-en-1-one, C21H14F2O2, (II), (2E)-1-(4-chlorophenyl)-3-(2-fluoro-4-phenoxyphenyl)prop-2-en-1-one, C21H14ClFO2, (III), (2E)-3-(2-fluoro-4-phenoxyphenyl)-1-(4-methylphenyl)prop-2-en-1-one, C22H17FO2, (IV), and (2E)-3-(2-fluoro-4-phenoxyphenyl)-1-(4-methoxyphenyl)prop-2-en-1-one, C22H17FO3, (V), the configuration of the keto group with respect to the olefinic double bond is s-cis. The molecules pack utilizing weak C-H...O and C-H...pi intermolecular contacts. Identical packing motifs involving C-H...O interactions, forming both chains and dimers, along with C-H...pi dimers and pi-pi aromatic interactions are observed in the fluoro, chloro and methyl derivatives. PMID:18057618

  12. Interspecific Variation in SO2 Flux 1

    PubMed Central

    Olszyk, David M.; Tingey, David T.

    1985-01-01

    The objective of this study was to clarify the relationships among stomatal, residual, and epidermal conductances in determining the flux of SO2 air pollution to leaves. Variations in leaf SO2 and H2O vapor fluxes were determined using four plant species: Pisum sativum L. (garden pea), Lycopersicon esculentum Mill. flacca (mutant of tomato), Geranium carolinianum L. (wild geranium), and Diplacus aurantiacus (Curtis) Jeps. (a native California shrub). Fluxes were measured using the mass-balance approach during exposure to 4.56 micromoles per cubic meter (0.11 microliters per liter) SO2 for 2 hours in a controlled environmental chamber. Flux through adaxial and abaxial leaf surfaces with closed stomata ranged from 1.9 to 9.4 nanomoles per square meter per second for SO2, and 0.3 to 1.3 millimoles per square meter per second for H2O vapor. Flux of SO2 into leaves through stomata ranged from ∼0 to 8.5 (dark) and 3.8 to 16.0 (light) millimoles per square meter per second. Flux of H2O vapor from leaves through stomata ranged from ∼0 to 0.6 (dark) to 0.4 to 0.9 (light) millimole per square meter per second. Lycopersicon had internal flux rates for both SO2 and H2O vapor over twice as high as for the other species. Stomatal conductance based on H2O vapor flux averaged from 0.07 to 0.13 mole per square meter per second among the four species. Internal conductance of SO2 as calculated from SO2 flux was from 0.04 mole per square meter per second lower to 0.06 mole per square meter per second higher than stomatal conductance. For Pisum, Geranium, and Diplacus stomatal conductance was the same or slightly higher than internal conductance, indicating that, in general, SO2 flux could be predicted from stomatal conductance for H2O vapor. However, for the Lycopersicon mutant, internal leaf conductance was much higher than stomatal conductance, indicating that factors inside leaves can play a significant role in determining SO2 flux. PMID:16664551

  13. Cu_2(1,4-diazacycloheptane)_2Cl_4: a Quasi-1D S=1/2 Spin Liquid System

    NASA Astrophysics Data System (ADS)

    Hammar, P. R.; Broholm, C.; Reich, D. H.; Trouw, F.

    1996-03-01

    The material Cu_2(1,4-diazacycloheptane)_2Cl4 consists of well-separated double chains of Cu atoms, whose structure suggests the possibility of significant antiferromagnetic next-nearest-neighbor interactions(B. Chiari, et al., Inorg. Chem 29), 1172 (1990).. We report on measurements of magnetic susceptibility, \\chi(H,T), heat capacity, C_p(T), and neutron scattering that show that this material has a singlet ground state and a gap to spin-carrying excitations. \\chi(H=0,T) shows a broad peak at T_Peak = 8K indicative of 1D antiferromagnetic correlations. Below the peak, \\chi drops dramatically towards zero. For T << T_Peak, \\chi(H)≈ 0 below a critical field HC = 6.6T and rises sharply above HC to a plateau at 8T. Below T_Peak, C_p(T) ∝ T-3/2exp(-Δ/T) with an activation energy Δ = 10K. Inelastic neutron scattering on powders shows a gap of 0.8 meV and a magnetic bandwidth of 0.6 meV. Comparison of these data to predictions for S=1/2 spin ladders and next-near-neighbor chains will be discussed. Supported by NSF grants DMR93-02065 and DMR94-53362, DOE BES-Materials Science contract W-31-109-ENG-38 with IPNS-ANL, and by the David and Lucile Packard Foundation

  14. M2-F1 in flight

    NASA Technical Reports Server (NTRS)

    1965-01-01

    The M2-F1 Lifting Body is seen here under tow, high above Rogers Dry Lake near the Flight Research Center (later redesignated the Dryden Flight Research Center), Edwards, California. R. Dale Reed effectively advocated the project with the support of NASA research pilot Milt Thompson. Together, they gained the support of Flight Research Center Director Paul Bikle. After a six-month feasibility study, Bikle gave approval in the fall of 1962 for the M2-F1 to be built. The wingless, lifting body aircraft design was initially concieved as a means of landing an aircraft horizontally after atmospheric reentry. The absence of wings would make the extreme heat of re-entry less damaging to the vehicle. In 1962, Flight Research Center management approved a program to build a lightweight, unpowered lifting body as a prototype to flight test the wingless concept. It would look like a 'flying bathtub,' and was designated the M2-F1, the 'M' referring to 'manned' and 'F' referring to 'flight' version. It featured a plywood shell placed over a tubular steel frame crafted at Dryden. Construction was completed in 1963. The first flight tests of the M2-F1 were over Rogers Dry Lake at the end of a tow rope attached to a hopped-up Pontiac convertible driven at speeds up to about 120 mph. These initial tests produced enough flight data about the M2-F1 to proceed with flights behind a NASA C-47 tow plane at greater altitudes. The C-47 took the craft to an altitude of 12,000 where free flights back to Rogers Dry Lake began. Pilot for the first series of flights of the M2-F1 was NASA research pilot Milt Thompson. Typical glide flights with the M2-F1 lasted about two minutes and reached speeds of 110 to l20 mph. More than 400 ground tows and 77 aircraft tow flights were carried out with the M2-F1. The success of Dryden's M2-F1 program led to NASA's development and construction of two heavyweight lifting bodies based on studies at NASA's Ames and Langley research centers--the M2-F2 and the HL

  15. Kinetics of 1,2-Dichloroethane and 1,2-Dibromoethane Biodegradation in Anaerobic Enrichment Cultures

    PubMed Central

    Yu, Rong; Peethambaram, Hari S.; Falta, Ronald W.; Verce, Matthew F.; Henderson, James K.; Bagwell, Christopher E.; Brigmon, Robin L.

    2013-01-01

    1,2-Dichloroethane (1,2-DCA) and 1,2-dibromoethane (ethylene dibromide [EDB]) contaminate groundwater at many hazardous waste sites. The objectives of this study were to measure yields, maximum specific growth rates (μ̂), and half-saturation coefficients (KS) in enrichment cultures that use 1,2-DCA and EDB as terminal electron acceptors and lactate as the electron donor and to evaluate if the presence of EDB has an effect on the kinetics of 1,2-DCA dehalogenation and vice versa. Biodegradation was evaluated at the high concentrations found at some industrial sites (>10 mg/liter) and at lower concentrations found at former leaded-gasoline sites (1.9 to 3.7 mg/liter). At higher concentrations, the Dehalococcoides yield was 1 order of magnitude higher when bacteria were grown with 1,2-DCA than when they were grown with EDB, while μ̂'s were similar for the two compounds, ranging from 0.19 to 0.52 day−1 with 1,2-DCA to 0.28 to 0.36 day−1 for EDB. KS was larger for 1,2-DCA (15 to 25 mg/liter) than for EDB (1.8 to 3.7 mg/liter). In treatments that received both compounds, EDB was always consumed first and adversely impacted the kinetics of 1,2-DCA utilization. Furthermore, 1,2-DCA dechlorination was interrupted by the addition of EDB at a concentration 100 times lower than that of the remaining 1,2-DCA; use of 1,2-DCA did not resume until the EDB level decreased close to its maximum contaminant level (MCL). In lower-concentration experiments, the preferential consumption of EDB over 1,2-DCA was confirmed; both compounds were eventually dehalogenated to their respective MCLs (5 μg/liter for 1,2-DCA, 0.05 μg/liter for EDB). The enrichment culture grown with 1,2-DCA has the advantage of a more rapid transition to 1,2-DCA after EDB is consumed. PMID:23263950

  16. Thermal effects in high power cavities for photoneutralization of D{sup −} beams in future neutral beam injectors

    SciTech Connect

    Fiorucci, Donatella; Feng, Jiatai; Pichot, Mikhaël; Chaibi, Walid

    2015-04-08

    Photoneutralization may represent a key issue in the neutral beam injectors for future fusion reactors. In fact, photodetachment based neutralization combined with an energy recovery system increase the injector overall efficiency up to 60%. This is the SIPHORE injector concept in which photoneutralization is realized in a refolded cavity [1]. However, about 1 W of the several megaWatts intracavity power is absorbed by the mirrors coatings and gives rise to important thermoelastic distortions. This is expected to change the optical behavior of the mirrors and reduce the enhancement factor of the cavity. In this paper, we estimate these effects and we propose a thermal system to compensate it.

  17. X-1-2 on ramp

    NASA Technical Reports Server (NTRS)

    1951-01-01

    The Bell Aircraft Corporation X-1-2 aircraft on the ramp at NACA High Speed Flight Research Station located on the South Base of Muroc Army Air Field in 1947. The X-1-2 flew until October 23, 1951, completing 74 glide and powered flights with nine different pilots. The aircraft has white paint and the NACA tail band. The black Xs are reference markings for tracking purposes. They were widely used on NACA aircraft in the early 1950s. There were five versions of the Bell X-1 rocket-powered research aircraft that flew at the NACA High-Speed Flight Research Station, Edwards, California. The bullet-shaped X-1 aircraft were built by Bell Aircraft Corporation, Buffalo, N.Y. for the U.S. Army Air Forces (after 1947, U.S. Air Force) and the National Advisory Committee for Aeronautics (NACA). The X-1 Program was originally designated the XS-1 for EXperimental Sonic. The X-1's mission was to investigate the transonic speed range (speeds from just below to just above the speed of sound) and, if possible, to break the 'sound barrier.' Three different X-1s were built and designated: X-1-1, X-1-2 (later modified to become the X-1E), and X-1-3. The basic X-1 aircraft were flown by a large number of different pilots from 1946 to 1951. The X-1 Program not only proved that humans could go beyond the speed of sound, it reinforced the understanding that technological barriers could be overcome. The X-1s pioneered many structural and aerodynamic advances including extremely thin, yet extremely strong wing sections; supersonic fuselage configurations; control system requirements; powerplant compatibility; and cockpit environments. The X-1 aircraft were the first transonic-capable aircraft to use an all-moving stabilizer. The flights of the X-1s opened up a new era in aviation. The first X-1 was air-launched unpowered from a Boeing B-29 Superfortress on Jan. 25, 1946. Powered flights began in December 1946. On Oct. 14, 1947, the X-1-1, piloted by Air Force Captain Charles 'Chuck' Yeager

  18. Volumetric Properties of the Mixture Dichloromethane CH2Cl2 + C2H2Cl4 1,1,2,2-Tetrachloroethane (VMSD1212, LB4571_V)

    NASA Astrophysics Data System (ADS)

    Cibulka, I.; Fontaine, J.-C.; Sosnkowska-Kehiaian, K.; Kehiaian, H. V.

    This document is part of Subvolume C 'Binary Liquid Systems of Nonelectrolytes III' of Volume 26 'Heats of Mixing, Vapor-Liquid Equilibrium, and Volumetric Properties of Mixtures and Solutions' of Landolt-Börnstein Group IV 'Physical Chemistry'. It contains the Chapter 'Volumetric Properties of the Mixture Dichloromethane CH2Cl2 + C2H2Cl4 1,1,2,2-Tetrachloroethane (VMSD1212, LB4571_V)' providing data by calculation of molar excess volume from low-pressure density measurements at variable mole fraction and constant temperature.

  19. M2-F1 simulator cockpit

    NASA Technical Reports Server (NTRS)

    1963-01-01

    This early simulator of the M2-F1 lifting body was used for pilot training, to test landing techniques before the first ground tow attempts, and to test new control configurations after the first tow attempts and wind-tunnel tests. The M2-F1 simulator was limited in some ways by its analog simulator. It had only limited visual display for the pilot, as well. The wingless, lifting body aircraft design was initially conceived as a means of landing an aircraft horizontally after atmospheric reentry. The absence of wings would make the extreme heat of re-entry less damaging to the vehicle. In 1962, Dryden management approved a program to build a lightweight, unpowered lifting body as a prototype to flight test the wingless concept. It would look like a 'flying bathtub,' and was designated the M2-F1, the 'M' referring to 'manned' and 'F' referring to 'flight' version. It featured a plywood shell placed over a tubular steel frame crafted at Dryden. Construction was completed in 1963. The first flight tests of the M2-F1 were over Rogers Dry Lake at the end of a tow rope attached to a hopped-up Pontiac convertible driven at speeds up to about 120 mph. This vehicle needed to be able to tow the M2-F1 on the Rogers Dry Lakebed adjacent to NASA's Flight Research Center (FRC) at a minimum speed of 100 miles per hour. To do that, it had to handle the 400-pound pull of the M2-F1. Walter 'Whitey' Whiteside, who was a retired Air Force maintenance officer working in the FRC's Flight Operations Division, was a dirt-bike rider and hot-rodder. Together with Boyden 'Bud' Bearce in the Procurement and Supply Branch of the FRC, Whitey acquired a Pontiac Catalina convertible with the largest engine available. He took the car to Bill Straup's renowned hot-rod shop near Long Beach for modification. With a special gearbox and racing slicks, the Pontiac could tow the 1,000-pound M2-F1 110 miles per hour in 30 seconds. It proved adequate for the roughly 400 car tows that got the M2-F1 airborne

  20. Dynamic relocation of the TORC1–Gtr1/2–Ego1/2/3 complex is regulated by Gtr1 and Gtr2

    PubMed Central

    Kira, Shintaro; Kumano, Yuri; Ukai, Hirofumi; Takeda, Eigo; Matsuura, Akira; Noda, Takeshi

    2016-01-01

    TORC1 regulates cellular growth, metabolism, and autophagy by integrating various signals, including nutrient availability, through the small GTPases RagA/B/C/D in mammals and Gtr1/2 in budding yeast. Rag/Gtr is anchored to the lysosomal/vacuolar membrane by the scaffold protein complex Ragulator/Ego. Here we show that Ego consists of Ego1 and Ego3, and novel subunit Ego2. The ∆ego2 mutant exhibited only partial defects both in Gtr1-dependent TORC1 activation and Gtr1 localization on the vacuole. Ego1/2/3, Gtr1/2, and Tor1/Tco89 were colocalized on the vacuole and associated puncta. When Gtr1 was in its GTP-bound form and TORC1 was active, these proteins were preferentially localized on the vacuolar membrane, whereas when Gtr1 was in its GDP-bound form, they were mostly localized on the puncta. The localization of TORC1 to puncta was further facilitated by direct binding to Gtr2, which is involved in suppression of TORC1 activity. Thus regulation of TORC1 activity through Gtr1/Gtr2 is tightly coupled to the dynamic relocation of these proteins. PMID:26609069

  1. TSC1/TSC2 and Rheb have different effects on TORC1 and TORC2 activity

    PubMed Central

    Yang, Qian; Inoki, Ken; Kim, Eunjung; Guan, Kun-Liang

    2006-01-01

    Target of rapamycin (TOR) plays a central role in cell growth regulation by integrating signals from growth factors, nutrients, and cellular energy levels. TOR forms two distinct physical and functional complexes, termed TOR complex 1 (TORC1) and TOR complex 2 (TORC2). TORC1, which is sensitive to rapamycin, regulates translation and cell growth, whereas TORC2, which is insensitive to rapamycin, regulates cell morphology and cell growth. The Ras homology enriched in brain (Rheb) small GTPase is known to be a key upstream activator of TORC1, although the mechanism of Rheb in TORC1 activation remains to be determined. However, the function of Rheb in the TORC2 regulation has not been elucidated. By measuring Akt and S6K phosphorylation as a functional assay for TORC1 and -2, here, we report that dRheb has an inhibitory effect on dTORC2 activity in Drosophila S2 cells. This negative effect of dRheb on dTORC2 is possibly due to a feedback mechanism involving dTORC1 and dS6K. We also observed that Rheb does not activate TORC2 in human embryonic kidney 293 cells, although it potently stimulates TORC1. Furthermore, tuberous sclerosis complex 1 (TSC1) and TSC2, which are negative regulators of Rheb, have negative and positive effects on TORC1 and -2, respectively. Our observations suggest that TSC1/2 and Rheb have different effects on the activity of TORC1 and -2, further supporting the complexity of TOR regulation. PMID:16627617

  2. M2-F1 In Tow Flight

    NASA Technical Reports Server (NTRS)

    1964-01-01

    The M2-F1 lifting body is seen here under tow at the Flight Research Center (later redesignated the Dryden Flight Research Center), Edwards, California. The wingless, lifting body aircraft design was initially conceived as a means of landing an aircraft horizontally after atmospheric reentry. The absence of wings would make the extreme heat of re-entry less damaging to the vehicle. In 1962, Dryden management approved a program to build a lightweight, unpowered lifting body as a prototype to flight test the wingless concept. It would look like a 'flying bathtub,' and was designated the M2-F1, the 'M' referring to 'manned' and 'F' referring to 'flight' version. It featured a plywood shell placed over a tubular steel frame crafted at Dryden. Construction was completed in 1963. The first flight tests of the M2-F1 were over Rogers Dry Lake at the end of a tow rope attached to a hopped-up Pontiac convertible driven at speeds up to about 120 mph. These initial tests produced enough flight data about the M2-F1 to proceed with flights behind a NASA C-47 tow plane at greater altitudes. The C-47 took the craft to an altitude of 12,000 feet where free flights back to Rogers Dry Lake began.

  3. Steroids Update, Part 1 and Part 2.

    ERIC Educational Resources Information Center

    Miller, Calvin; Duda, Marty

    1986-01-01

    Part 1 of this two-part article describes the views of a physician who believes that athletes who want to take steroids are best protected by receiving a prescription and monitoring. Part 2 discusses the more general view of physicians that steroids should not be prescribed but perhaps should be monitored. (MT)

  4. Diffusion of oxygen (1); isoquinoline (2)

    NASA Astrophysics Data System (ADS)

    Winkelmann, J.

    This document is part of Subvolume A `Gases in Gases, Liquids and their Mixtures' of Volume 15 `Diffusion in Gases, Liquids and Electrolytes' of Landolt-Börnstein Group IV `Physical Chemistry'. It is part of the chapter of the chapter `Diffusion in Pure Gases' and contains data on diffusion of (1) oxygen; (2) isoquinoline

  5. 12 CFR 1.2 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... capital standards set forth in appendix A to 12 CFR part 3 (or comparable capital guidelines of the...(a)(2); (3) Is offered and sold pursuant to Securities and Exchange Commission Rule 144A, 17 CFR 230... defined in 12 CFR 6.4(b)(1); (5) Obligations authorized under 12 U.S.C. 24 (Seventh) as permissible for...

  6. 1,2-Dibromo-3-chloropropane (DBCP)

    Integrated Risk Information System (IRIS)

    1,2 - Dibromo - 3 - chloropropane ( DBCP ) ; CASRN 96 - 12 - 8 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessm

  7. 1,2,4,5-Tetrachlorobenzene

    Integrated Risk Information System (IRIS)

    1,2,4,5 - Tetrachlorobenzene ; CASRN 95 - 94 - 3 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data , as outlined in the IRIS assessment development process . Sections I ( Health Hazard Assessments for Nonca

  8. Diffusion of air (1); furfural (2)

    NASA Astrophysics Data System (ADS)

    Winkelmann, J.

    This document is part of Subvolume A `Gases in Gases, Liquids and their Mixtures' of Volume 15 `Diffusion in Gases, Liquids and Electrolytes' of Landolt-Börnstein Group IV `Physical Chemistry'. It is part of the chapter of the chapter `Diffusion in Pure Gases' and contains data on diffusion of (1) air; (2) furfural

  9. 2 CFR 1.300 - OMB responsibilities.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Grants and Agreements ABOUT TITLE 2 OF THE CODE OF FEDERAL REGULATIONS AND SUBTITLE A Responsibilities of... maintaining the guidance in this subtitle, as described in § 1.230. (b) Interpreting the policy requirements in this subtitle. (c) Reviewing Federal agency regulations implementing the requirements of...

  10. 1,2,3-triazolium ionic liquids

    SciTech Connect

    Luebke, David; Nulwala, Hunaid; Tang, Chau

    2014-12-09

    The present invention relates to compositions of matter that are ionic liquids, the compositions comprising substituted 1,2,3-triazolium cations combined with any anion. Compositions of the invention should be useful in the separation of gases and, perhaps, as catalysts for many reactions.

  11. 32 CFR 2.1 - Purpose.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... commercial, industrial practice” refers to any acquisition management practice, process, or procedure that is... include, but are not limited to: (1) Innovative contracting policies and practices; (2) Performance and commercial specifications and standards; (3) Innovative budget policies; (4) Establishing fair and...

  12. 32 CFR 2.1 - Purpose.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... commercial, industrial practice” refers to any acquisition management practice, process, or procedure that is... include, but are not limited to: (1) Innovative contracting policies and practices; (2) Performance and commercial specifications and standards; (3) Innovative budget policies; (4) Establishing fair and...

  13. 32 CFR 2.1 - Purpose.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... commercial, industrial practice” refers to any acquisition management practice, process, or procedure that is... include, but are not limited to: (1) Innovative contracting policies and practices; (2) Performance and commercial specifications and standards; (3) Innovative budget policies; (4) Establishing fair and...

  14. Health Manpower Literature. Volume 2, Number 1.

    ERIC Educational Resources Information Center

    Goldstein, Harold M.; And Others

    This publication presents abstracts, statistics, and references drawn from health manpower literature. It is divided into seven sections; the first section provides statistics on (1) estimated employment in selected health occupations that are potentially entry-level, (2) hospital indicators, and (3) percent distribution of personal health care…

  15. 7. Photocopy of photographca. 1927 (2 1/4 X 2 1/4' ...

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

    7. Photocopy of photograph--ca. 1927 (2 1/4 X 2 1/4' negative) DETAIL SHOWING ADAPTATION THAT ALLOWED USE OF UPPER END OF ORIGINAL FLUME AND LOWER END JUST RECONSTRUCTED - Power Flume No. 1, Tacoma, La Plata County, CO

  16. Vapor-liquid equilibria for hydrogen fluoride + difluoromethane, + 1,1,1,2-tetrafluoroethane, and + 1-chloro-1,2,2,2-tetrafluoromethane at 283.3 and 298.2 K

    SciTech Connect

    Lee, J.; Kim, H.; Lim, J.S.; Kim, J.D.; Lee, Y.Y.

    1996-01-01

    The production of refrigerants involves the separation of multicomponent mixtures containing hydrogen fluoride, hydrogen chloride, and various chlorinated and fluorinated hydrocarbons. Therefore, it is essential to known the phase behavior of these mixtures. Isothermal vapor-liquid equilibria for hydrogen fluoride (HF) + difluoromethane (HFC-32), HF + 1,1,1,2-tetrafluoroethane (HFC-134a), and HF + 1-chloro-1,2,2,2-tetrafluoroethane (HCFC-124) were measured by the P-T-x method at 283.3 and 298.2 K. Vapor compositions were calculated from these results. Among these systems, the HF + HFC-134a and HF + HCFC-124 systems exhibit minimum boiling azeotropes at both temperatures.

  17. M2-F1 in flight

    NASA Technical Reports Server (NTRS)

    1964-01-01

    The M2-F1 Lifting Body is seen here under tow by an unseen C-47 at the NASA Flight Research Center (later redesignated the Dryden Flight Research Center), Edwards, California. The low-cost vehicle was the first piloted lifting body to be test flown. The lifting-body concept originated in the mid-1950s at the National Advisory Committee for Aeronautics' Ames Aeronautical Laboratory, Mountain View California. By February 1962, a series of possible shapes had been developed, and R. Dale Reed was working to gain support for a research vehicle. The wingless, lifting body aircraft design was initially concieved as a means of landing an aircraft horizontally after atmospheric reentry. The absence of wings would make the extreme heat of re-entry less damaging to the vehicle. In 1962, Dryden management approved a program to build a lightweight, unpowered lifting body as a prototype to flight test the wingless concept. It would look like a 'flying bathtub,' and was designated the M2-F1, the 'M' referring to 'manned' and 'F' referring to 'flight' version. It featured a plywood shell placed over a tubular steel frame crafted at Dryden. Construction was completed in 1963. The first flight tests of the M2-F1 were over Rogers Dry Lake at the end of a tow rope attached to a hopped-up Pontiac convertible driven at speeds up to about 120 mph. These initial tests produced enough flight data about the M2-F1 to proceed with flights behind a NASA C-47 tow plane at greater altitudes. The C-47 took the craft to an altitude of 12,000 where free flights back to Rogers Dry Lake began. Pilot for the first series of flights of the M2-F1 was NASA research pilot Milt Thompson. Typical glide flights with the M2-F1 lasted about two minutes and reached speeds of 110 to l20 mph. More than 400 ground tows and 77 aircraft tow flights were carried out with the M2-F1. The success of Dryden's M2-F1 program led to NASA's development and construction of two heavyweight lifting bodies based on studies at

  18. Nitrone Cycloadditions of 1,2-Cyclohexadiene

    PubMed Central

    Barber, Joyann S.; Styduhar, Evan D.; Pham, Hung V.; McMahon, Travis C.; Houk, K. N.; Garg, Neil K.

    2016-01-01

    We report the first 1,3-dipolar cycloadditions of 1,2-cyclohexadiene, a rarely exploited strained allene. 1,2-Cyclohexadiene is generated in situ under mild conditions and trapped with nitrones to give isoxazolidine products in synthetically useful yields. The reactions occur regioselectively and exhibit a notable endo preference, thus resulting in the controlled formation of two new bonds and two stereogenic centers. DFT calculations of stepwise and concerted reaction pathways are used to rationalize the observed selectivities. Moreover, the strategic manipulation of nitrone cycloadducts demonstrates the utility of this methodology for the assembly of compounds bearing multiple heterocyclic units. These studies showcase the exploitation of a traditionally avoided reactive intermediate in chemical synthesis. PMID:26854652

  19. (7-Benzyloxy-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetic Acids as S1P1 Functional Antagonists

    PubMed Central

    2014-01-01

    S1P1 is a validated target for treatment of autoimmune disease, and functional antagonists with superior safety and pharmacokinetic properties are being sought as second generation therapeutics. We describe the discovery and optimization of (7-benzyloxy-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetic acids as potent, centrally available, direct acting S1P1 functional antagonists, with favorable pharmacokinetic and safety properties. PMID:25516794

  20. Internal rotation for predicting conformational population of 1,2-difluorethane and 1,2-dichloroethane

    NASA Astrophysics Data System (ADS)

    Venâncio, Mateus F.; Dos Santos, Hélio F.; De Almeida, Wagner B.

    2016-06-01

    The contribution of internal rotation to the thermal correction of Gibbs free energy (ΔG) is estimated using the quantum pendulum model (QPM) to solve the characteristic Schrödinger equation. The procedure is applied to theoretical prediction of conformational population of 1,2-difluorethane (1,2-DFE) and 1,2-dichloroethane (1,2-DCE) molecules. The predicted population for the anti form was 37% and 75%, for 1,2-DFE and 1,2-DCE respectively, in excellent agreement with experimental gas phase data available, 37 ± 5% and 78 ± 5%. These results provide great support to the use of the QPM model to account for the low vibrational frequency modes effect on the calculation of thermodynamic properties.

  1. Adiabatic demagnetization of spin-1/2 antiferromagnetic J1-J2 Heisenberg hexagon

    NASA Astrophysics Data System (ADS)

    Deb, Moumita; Ghosh, Asim Kumar

    2016-05-01

    Analytic expressions of exact eigenvalues of the antiferromagnetic spin-1/2 J1-J2 Heisenberg hexagon in the presence of magnetic field have been obtained. Studies on the magnetization process, nature of isentrops and properties of magnetocaloric effect in terms of adiabatic demagnetization have been carried out. Magnetocaloric effect of the spin-1/2 Heisenberg hexagonal compound Cu3WO6 has been investigated with the help of these theoretical findings.

  2. Adsorption of dichlorodifluoromethane, chlorodifluoromethane, chloropentafluoroethane, 1,1-difluoroethane, and 1,1,1,2-tetrafluoroethane on silica gel

    SciTech Connect

    Frere, M.; Berlier, K.; Bougard, J.; Jadot, R. . Service de Thermodynamique)

    1994-10-01

    The CFC's (chlorofluorocarbons) are used as working refrigerants fluids. The most commonly used are R12, R22, and R502 (48.8% R22 and 51.2% R115). Recent concerns of the effects of CFC's on the ozone layer require the development of efficient recovery methods. One technique is to adsorb the fluids onto a porous medium such as silica gel. Thermodynamic data on the adsorption of dichlorodifluoromethane (R12), chlorodifluoromethane (R22), chloropentafluoroethane (R115), 1,1-difluoroethane (R152a), and 1,1,1,2-tetrafluoroethane (R134a) on silica gel are required for the design of recovery units. The results are presented here.

  3. 2MASS Catalog Server Kit Version 2.1

    NASA Astrophysics Data System (ADS)

    Yamauchi, C.

    2013-10-01

    The 2MASS Catalog Server Kit is open source software for use in easily constructing a high performance search server for important astronomical catalogs. This software utilizes the open source RDBMS PostgreSQL, therefore, any users can setup the database on their local computers by following step-by-step installation guide. The kit provides highly optimized stored functions for positional searchs similar to SDSS SkyServer. Together with these, the powerful SQL environment of PostgreSQL will meet various user's demands. We released 2MASS Catalog Server Kit version 2.1 in 2012 May, which supports the latest WISE All-Sky catalog (563,921,584 rows) and 9 major all-sky catalogs. Local databases are often indispensable for observatories with unstable or narrow-band networks or severe use, such as retrieving large numbers of records within a small period of time. This software is the best for such purposes, and increasing supported catalogs and improvements of version 2.1 can cover a wider range of applications including advanced calibration system, scientific studies using complicated SQL queries, etc. Official page: http://www.ir.isas.jaxa.jp/~cyamauch/2masskit/

  4. (1+2)-dimensional strongly nonlocal solitons

    SciTech Connect

    Ouyang Shigen; Guo Qi

    2007-11-15

    Approximate solutions of (1+2)-dimensional strongly nonlocal solitons (SNSs) are presented. It is shown that the power of a SNS in a nematic liquid crystal is in direct proportion to the second power of the degree of nonlocality, the power of a SNS in a nonlocal medium with a logarithmic nonlocal response is in inverse proportion to the second power of its beamwidth, and the power of a SNS in a nonlocal medium with an sth-power decay nonlocal response is in direct proportion to the (s+2)th power of the degree of nonlocality.

  5. A neutron diffraction study of structural distortion and magnetic ordering in the cation-ordered perovskites Ba{sub 2}Nd{sub 1−x}Y{sub x}MoO{sub 6}

    SciTech Connect

    Collins, Oonagh M.; Cussen, Edmund J.

    2013-04-15

    The cation ordered perovskites Ba{sub 2}Nd{sub 1−x}Y{sub x}MoO{sub 6} (0.04≤x≤0.35) have been synthesised by solid-state techniques under reducing conditions at temperatures up to 1350 °C. Rietveld analyses of X-ray and neutron powder diffraction data show that these compounds adopt a tetragonally distorted perovskite structure. The tetragonal distortion is driven by the bonding requirements of the Ba{sup 2+} cation that occupies the central interstice of the perovskite; this cation would be underbonded if these compounds retained the cubic symmetry exhibited by the prototypical structure. The size and charge difference between the lanthanides and Mo{sup 5+} lead to complete ordering of the cations to give a rock-salt ordering of Nd{sup 3+}/Y{sup 3+}O{sub 6} and MoO{sub 6} octahedra. The I4/m space group symmetry is retained on cooling the x=0.1, 0.2 and 0.35 samples to low temperature ca. 2 K. Ba{sub 2}Nd{sub 0.90}Y{sub 0.10}MoO{sub 6} undergoes a gradual distortion of the MoO{sub 6} units on cooling from room temperature to give two long trans bonds (2.001(2) Å) along the z-direction and four shorter apical bonds (1.9563(13) Å) in the xy-plane. This distortion of the MoO{sub 6} units stabilises the 4d{sup 1} electron in the d{sub xz} and d{sub yz} orbitals whilst the d{sub xy} orbital is increased in energy due to the contraction of the Mo–O bonds in the xy-plane. This bond extension along z is propagated through the structure and gives a negative thermal expansion of −13×10{sup −6} K{sup −1} along c. The overall volumetric thermal expansion is positive due to conventional expansion along the other two crystallographic axes. With increasing Y{sup 3+} content this distortion is reduced in x=0.2 and eliminated in x=0.35 which contains largely regular MoO{sub 6} octahedra. The x=0.1 and x=0.2 show small peaks in the neutron diffraction profile due to long range antiferromagnetic order arising from ordered moments of ca. 2 μ{sub B}. - Graphical

  6. The effect of the CYP1A2 *1F mutation on CYP1A2 inducibility in pregnant women

    PubMed Central

    Nordmark, Anna; Lundgren, Stefan; Ask, Birgitta; Granath, Fredrik; Rane, Anders

    2002-01-01

    Aims To investigate the influence of the CYP1A2*1F mutation on CYP1A2 activity in smoking and nonsmoking pregnant women. Methods Pregnant women (n = 904) who served as control subjects in a case-control study of early fetal loss were investigated. They were phenotyped for CYP1A2 using dietary caffeine and the urinary ratio AFMU + 1X + 1 U/1,7 U. An assay for CYP1A2*1F using 5′-nuclease assay (Taqman) was developed to genotype the population. Results The frequencies of *1 A and *1F alleles among Swedish women were 0.29 and 0.71, respectively. There was no statistically significant difference in CYP1A2 activity between the genotypes, although a trend towards enhanced activity was observed in *1F/*1F (log MRc 0.77) and *1F/*1 A (log MRc 0.82) genotypes compared with the *1 A/*1 A genotype (log MRc 0.71) (anovaP = 0.07). The mean difference between the *1 A homozygotes and the heterozygotes was 0.11 [95% confidence interval of the difference: (−0.21, −0.01)] and that between the *1 A and *1F homozygotes was 0.05 [95% confidence interval of the difference: (−0.13, 0.03)]. No significant effect (P = 0.22) of the *1F on CYP1A2 activity was observed in smokers, tested using an interaction term (smoking * genotype) in the anova model (*1F/*1F log MRc 0.79, *1F/*1 A log MRc 0.86, and *1 A/*1 A log MRc 0.73). In smokers, there was no difference in ratio between homozygotes for the *1 A and *1F alleles [mean difference −0.06; 95% confidence interval of the difference: −0.22, 0.11] or between *1 A/*1 A and *1 A/*1F genotypes [mean difference −0.13; 95% confidence interval of the difference: −0.29, 0.04]. Conclusions The effect of the CYP1A2*1F mutation on CYP1A2 activity in smoking pregnant women could not be confirmed. PMID:12445029

  7. Structural studies of 1-phenyl-2,3-dimethyl-5-oxo-1,2-dihydro-1H-pyrazol-4-ammonium 2[(2-carboxyphenyl) disulfanyl]benzoate

    NASA Astrophysics Data System (ADS)

    Fazil, Shiji; Ravindran, Reena; Sarau Devi, A.; Bijili, B. K.

    2012-08-01

    Reaction of 4-aminoantipyrine with 2-mercaptobenzoic acid afforded a proton transfer derivative, 1-phenyl-2,3-dimethyl-5-oxo-1,2-dihydro-1H-pyrazol-4-ammonium 2[(2-carboxyphenyl) disulfanyl]benzoate, (HAAP+ṡHTBA-), via the oxidation of 2-mercaptobenzoic acid into 2,2'-dithiobis(benzoic acid). The compound has been characterized on the basis of elemental analysis, IR, 1H and 13C NMR and mass spectral data. The infrared spectrum suggests the existence of an ion-pair compound, which is further established by the single crystal X-ray analysis to be an extended 1D supramolecular chain network extending along 'b' cell direction. The compound shows good thermal stability.

  8. Complexation of 1-hexadecyl-4-aza-1-azoniabicyclo[2.2.2]octane bromide with nickel nitrate in acetone

    NASA Astrophysics Data System (ADS)

    Zhiltsova, E. P.; Lukashenko, S. S.; Ibatullina, M. R.; Kutyreva, M. P.; Zakharova, L. Ya.

    2016-07-01

    The complexation of 1-hexadecyl-4-aza-1-azoniabicyclo[2.2.2]octane bromide with Ni(II) nitrate in acetone is studied by means of spectrophotometry (the Job-Ostromisslensky technique and molar ratios). The formation of 3: 1 and 1: 1 ligand: metal complexes is established and confirmed by mathematical modeling. The stability constants of the complexes and the change in the Gibbs free energy are determined.

  9. M2-F1 in Tow

    NASA Technical Reports Server (NTRS)

    1964-01-01

    The M2-F1 lifting body is seen here being towed behind a C-47 at the Flight Research Center (later redesignated the Dryden Flight Research Center), Edwards, California. The wingless, lifting body aircraft design was initially conceived as a means of landing an aircraft horizontally after atmospheric re-entry. The absence of wings would make the extreme heat of re-entry less damaging to the vehicle.

  10. Landsat-1 and Landsat-2 flight evaluation

    NASA Technical Reports Server (NTRS)

    1975-01-01

    The flight performance of Landsat 1 and Landsat 2 is analyzed. Flight operations of the satellites are briefly summarized. Other topics discussed include: orbital parameters; power subsystem; attitude control subsystem; command/clock subsystem; telemetry subsystem; orbit adjust subsystem; magnetic moment compensating assembly; unified s-band/premodulation processor; electrical interface subsystem; thermal subsystem; narrowband tape recorders; wideband telemetry subsystem; attitude measurement sensor; wideband video tape recorders; return beam vidicon; multispectral scanner subsystem; and data collection subsystem.

  11. High-pressure single-crystal elasticity study of CO{sub 2} across phase I-III transition

    SciTech Connect

    Zhang, Jin S. Bass, Jay D.; Shieh, Sean R.; Dera, Przemyslaw; Prakapenka, Vitali

    2014-04-07

    Sound velocities and elastic moduli of solid single-crystal CO{sub 2} were measured at pressures up to 11.7(3) GPa by Brillouin spectroscopy. The aggregate adiabatic bulk modulus (K{sub S}), shear modulus (G), and their pressure derivatives for CO{sub 2} Phase I are K{sub S0} = 3.4(6) GPa, G{sub 0} = 1.8(2) GPa, (dK{sub S}/dP){sub 0} = 7.8(3), (dG/dP){sub 0} = 2.5(1), (d{sup 2}K{sub S}/dP{sup 2}){sub 0} = −0.23(3) GPa{sup −1}, and (d{sup 2}G/dP{sup 2}){sub 0} = −0.10(1) GPa{sup −1}. A small increase of elastic properties was observed between 9.8(1) and 10.5(3) GPa, in agreement with the CO{sub 2} I-III transition pressure determined from previous x-ray diffraction experiments. Above the transition pressure P{sub T}, we observed a mixture dominated by CO{sub 2}-I, with minor CO{sub 2}-III. The CO{sub 2}-I + III mixture shows slightly increased sound velocities compared to pure CO{sub 2}-I. Elastic anisotropy calculated from the single-crystal elasticity tensor exhibits a decrease with pressure beginning at 7.9(1) GPa, which is lower than P{sub T}. Our results coincide with recent X-ray Raman observations, suggesting that a pressure-induced electronic transition is related to local structural and optical changes.

  12. MISSE 1 and 2 Tray Temperature Measurements

    NASA Technical Reports Server (NTRS)

    Harvey, Gale A.; Kinard, William H.

    2006-01-01

    The Materials International Space Station Experiment (MISSE 1 & 2) was deployed August 10,2001 and retrieved July 30,2005. This experiment is a co-operative endeavor by NASA-LaRC. NASA-GRC, NASA-MSFC, NASA-JSC, the Materials Laboratory at the Air Force Research Laboratory, and the Boeing Phantom Works. The objective of the experiment is to evaluate performance, stability, and long term survivability of materials and components planned for use by NASA and DOD on future LEO, synchronous orbit, and interplanetary space missions. Temperature is an important parameter in the evaluation of space environmental effects on materials. The MISSE 1 & 2 had autonomous temperature data loggers to measure the temperature of each of the four experiment trays. The MISSE tray-temperature data loggers have one external thermistor data channel, and a 12 bit digital converter. The MISSE experiment trays were exposed to the ISS space environment for nearly four times the nominal design lifetime for this experiment. Nevertheless, all of the data loggers provided useful temperature measurements of MISSE. The temperature measurement system has been discussed in a previous paper. This paper presents temperature measurements of MISSE payload experiment carriers (PECs) 1 and 2 experiment trays.

  13. Asymmetric nitrogen. Communications 38. Optically active 1-hydroxyl-, 1-alkoxycarbonyloxy-, and 1-tosyloxy-2, 2-bis(trifluoromethyl)-aziridines

    SciTech Connect

    Kostyanovskii, R.G.; Chervin, I.I.; Kadorkina, G.K.; Maldonado, I.K.A.; Nasibov, S.S.

    1985-08-20

    The authors accomplish the separation of diastereomers Xa,b and KIa,b obtained from chiral alkoxycarbonyl derivatives of hexafluoracetone oxime by reaction with CH/sub 2/N/sub 2/ through the corresponding triazolines, which were decomposed to the aziridines by photolysis or by the action of Et/sub 2/O.BF/sub 3/ at 20 C. Diasteromeric 1-alkoxycarbonyloxy-2,2-bis(trifluormethyl)ariridines, which were speated by crystallization and chromatography, under the influence of phenylhydrazine acylates give optically active 1-hydroxy-2,2-bis(trifluoromethyl)aziridine, on the basis of which optically active 1-tosyloxy-2,2-bis(trifluoromethyl)aziridine was obtained. The activation parameters of the epimerization of diasteromeric 1-alkoxycarbonyloxy-2,2-bis(trifluoromethyl)aziridine were found.

  14. 40 CFR 721.10577 - Benzenamine, 5-(1,1-dimethylethyl)-2-[(2-ethylhexyl)thio]-,4-methylbenzenesulfonate (1:1).

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 32 2013-07-01 2013-07-01 false Benzenamine, 5-(1,1-dimethylethyl)-2... Significant New Uses for Specific Chemical Substances § 721.10577 Benzenamine, 5-(1,1-dimethylethyl)-2- -,4... substance identified as benzenamine, 5-(1,1-dimethylethyl)-2- -,4-methylbenzenesulfonate (1:1) (PMN...

  15. 40 CFR 721.10577 - Benzenamine, 5-(1,1-dimethylethyl)-2-[(2-ethylhexyl)thio]-,4-methylbenzenesulfonate (1:1).

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 31 2014-07-01 2014-07-01 false Benzenamine, 5-(1,1-dimethylethyl)-2... Significant New Uses for Specific Chemical Substances § 721.10577 Benzenamine, 5-(1,1-dimethylethyl)-2- -,4... substance identified as benzenamine, 5-(1,1-dimethylethyl)-2- -,4-methylbenzenesulfonate (1:1) (PMN...

  16. A study of the molecular structure and vibrational spectra of 1,3-dichloro-2-propanol and 1,1,1-trichloro-2-methyl-2-propanol (chlorobutanol).

    PubMed

    Badawi, Hassan M

    2012-02-15

    The conformational stability of 1,3-dichloro-2-propanol and 1,1,1-trichloro-2-methyl-2-propanol (chlorobutanol) was investigated by the DFT-B3LYP/6-311+G**, MP2/6-311+G** and MP4(SDQ)/6-311+G** levels of theory. From the calculations chlorobutanol was predicted to exist in a non-planar gauche structure. The planar cis and trans structures of chlorobutanol were calculated to be about 3kcal/mol higher in energy than the gauche structure. From the calculations 1,3-dichloro-2-propanol was predicted to exist in a Ggg1 and Ggg conformational mixture at ambient temperature. In the low energy structures of both alcohols the non-bonded Cl⋯H(O) distance was calculated to be of about 2.6-2.7Å. The observation of a broad and very intense band at about 3400cm(-1) in the infrared spectra of the two alcohols supports the presence of strong intermolecular Cl⋯H(O) dipolar interactions in their condensed phases. The analysis of the Raman spectra of 1,3-dichloro-2-propanol suggests the presence of a second high energy Ggg structure of the dichloride at room temperature. The vibrational frequencies of 1,3-dichloro-2-propanol and chlorobutanol in their low energy structures were computed at the B3LYP level and tentative vibrational assignments were made for their normal modes on the basis of combined calculated and experimental data. PMID:22154261

  17. A study of the molecular structure and vibrational spectra of 1,3-dichloro-2-propanol and 1,1,1-trichloro-2-methyl-2-propanol (chlorobutanol)

    NASA Astrophysics Data System (ADS)

    Badawi, Hassan M.

    2012-02-01

    The conformational stability of 1,3-dichloro-2-propanol and 1,1,1-trichloro-2-methyl-2-propanol (chlorobutanol) was investigated by the DFT-B3LYP/6-311+G**, MP2/6-311+G** and MP4(SDQ)/6-311+G** levels of theory. From the calculations chlorobutanol was predicted to exist in a non-planar gauche structure. The planar cis and trans structures of chlorobutanol were calculated to be about 3 kcal/mol higher in energy than the gauche structure. From the calculations 1,3-dichloro-2-propanol was predicted to exist in a Ggg1 and Ggg conformational mixture at ambient temperature. In the low energy structures of both alcohols the non-bonded Cl⋯H(O) distance was calculated to be of about 2.6-2.7 Å. The observation of a broad and very intense band at about 3400 cm -1 in the infrared spectra of the two alcohols supports the presence of strong intermolecular Cl⋯H(O) dipolar interactions in their condensed phases. The analysis of the Raman spectra of 1,3-dichloro-2-propanol suggests the presence of a second high energy Ggg structure of the dichloride at room temperature. The vibrational frequencies of 1,3-dichloro-2-propanol and chlorobutanol in their low energy structures were computed at the B3LYP level and tentative vibrational assignments were made for their normal modes on the basis of combined calculated and experimental data.

  18. Age-Dependent Human Hepatic Carboxylesterase 1 (CES1) and Carboxylesterase 2 (CES2) Postnatal Ontogeny.

    PubMed

    Hines, Ronald N; Simpson, Pippa M; McCarver, D Gail

    2016-07-01

    Human hepatic carboxylesterase 1 and 2 (CES1 and CES2) are important for the disposition of ester- and amide-bond-containing pharmaceuticals and environmental chemicals. CES1 and CES2 ontogeny has not been well characterized, causing difficulty in addressing concerns regarding juvenile sensitivity to adverse outcomes associated with exposure to certain substrates. To characterize postnatal human hepatic CES1 and CES2 expression, microsomal and cytosolic fractions were prepared using liver samples from subjects without liver disease (N = 165, aged 1 day to 18 years). Proteins were fractionated, detected, and quantitated by Western blotting. Median microsomal CES1 was lower among samples from subjects younger than 3 weeks (n = 36) compared with the rest of the population (n = 126; 6.27 vs. 17.5 pmol/mg microsomal protein, respectively; P < 0.001; Kruskal-Wallis test). Median cytosolic CES1 expression was lowest among samples from individuals between birth and 3 weeks of age (n = 36), markedly greater among those aged 3 weeks to 6 years (n = 90), and modestly greater still among those older than 6 years (n = 36; median values = 4.7, 15.8, and 16.6 pmol/mg cytosolic protein, respectively; P values < 0.001 and 0.05, respectively; Kruskal-Wallis test). Median microsomal CES2 expression increased across the same three age groups with median values of 1.8, 2.9, and 4.2 pmol/mg microsomal protein, respectively (P < 0.001, both). For cytosolic CES2, only the youngest age group differed from the two older groups (P < 0.001; median values = 1.29, 1.93, 2.0, respectively). These data suggest that infants younger than 3 weeks of age would exhibit significantly lower CES1- and CES2-dependent metabolic clearance compared with older individuals. PMID:26825642

  19. Virtual Machine Language 2.1

    NASA Technical Reports Server (NTRS)

    Riedel, Joseph E.; Grasso, Christopher A.

    2012-01-01

    VML (Virtual Machine Language) is an advanced computing environment that allows spacecraft to operate using mechanisms ranging from simple, time-oriented sequencing to advanced, multicomponent reactive systems. VML has developed in four evolutionary stages. VML 0 is a core execution capability providing multi-threaded command execution, integer data types, and rudimentary branching. VML 1 added named parameterized procedures, extensive polymorphism, data typing, branching, looping issuance of commands using run-time parameters, and named global variables. VML 2 added for loops, data verification, telemetry reaction, and an open flight adaptation architecture. VML 2.1 contains major advances in control flow capabilities for executable state machines. On the resource requirements front, VML 2.1 features a reduced memory footprint in order to fit more capability into modestly sized flight processors, and endian-neutral data access for compatibility with Intel little-endian processors. Sequence packaging has been improved with object-oriented programming constructs and the use of implicit (rather than explicit) time tags on statements. Sequence event detection has been significantly enhanced with multi-variable waiting, which allows a sequence to detect and react to conditions defined by complex expressions with multiple global variables. This multi-variable waiting serves as the basis for implementing parallel rule checking, which in turn, makes possible executable state machines. The new state machine feature in VML 2.1 allows the creation of sophisticated autonomous reactive systems without the need to develop expensive flight software. Users specify named states and transitions, along with the truth conditions required, before taking transitions. Transitions with the same signal name allow separate state machines to coordinate actions: the conditions distributed across all state machines necessary to arm a particular signal are evaluated, and once found true, that

  20. The structure and reactivity of 2-butanol on Pd(1 1 1)

    NASA Astrophysics Data System (ADS)

    Gao, Feng; Wang, Yilin; Burkholder, Luke; Hirschmugl, Carol; Saldin, Dilano K.; Poon, Hin Cheuk; Sholl, David; James, Joanna; Tysoe, Wilfred T.

    2008-07-01

    The structure, formation and decomposition pathways of 2-butoxide species formed on a Pd(1 1 1) surface following the adsorption of 2-butanol is studied by a combination of density functional theory (DFT), analysis of the low-energy electron intensity versus beam energy curves (LEED I/E) and temperature-programmed desorption (TPD). Both DFT calculations and LEED I/E measurements reveal that 2-butoxide adsorbs with the oxygen atom located in the three-fold hollow sites on Pd(1 1 1) with the C-O bond almost perpendicular to the surface with the 2-butyl group in the trans configuration. At coverages below ˜0.11 monolayers, adsorbed 2-butoxide species completely thermally decompose to desorb hydrogen and carbon monoxide. The 2-butoxide species present at higher coverages either hydrogenate to reform 2-butanol or undergo a β-hydride elimination reaction to form 2-butanone.