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Sample records for yadrami 208pb pri

  1. Compton scattering on 208Pb

    International Nuclear Information System (INIS)

    Alberico, W.M.; Molinari, A.

    1982-01-01

    In this paper we briefly review the formalism of the nuclear Compton scattering in the frame of the low-energy theorems (LET). We treat the resonant terms of the amplitude, having collective intermediate nuclear states, as a superposition of Lorentz lines with energy, width and strength fixed by the photo-absorption experiments. The gauge terms are evaluated starting from a simple, but realistic, nuclear Hamiltonian. Dynamical nucleon-nucleon correlations are consistently taken into account, beyond those imposed by the Pauli principle. The comparison of the theoretical predictions with the data of elastic diffusion of photons from 208 Pb shows that LET are insufficient to account for the experiment. (orig.)

  2. The analog resonance of 208Pb

    International Nuclear Information System (INIS)

    Brinati, J.R.; Bund, G.W.

    1973-01-01

    Elastic and inelastic partial proton widths and Coulomb displacement energies for the IAR of the Ground State of 208 Pb are calculated in the Blair-Bund model. Exchange terms are included and different optical potentials are considered. Comparison with the experimental widths is made taking into account the off-resonance cross sections predicted by the optical potentials [pt

  3. Nuclear polarization in muonic 208Pb

    International Nuclear Information System (INIS)

    Haga, Akihiro; Tanaka, Yasutoshi; Horikawa, Yataro

    2002-01-01

    We calculate nuclear-polarization energy shifts in muonic 208 Pb. We employ a relativistic field-theoretical calculation and evaluate the ladder, cross, and seagull terms of the two-photon exchange diagrams in both the Feynman and Coulomb gauges. Gauge independence is very well satisfied with the calculated nuclear-polarization energies. Using these results, we analyze fine-structure splitting energies of muonic 208 Pb because of the presence of the persisting discrepancies between experiment and calculation. The present nuclear-polarization energies explain about half of the anomaly in the Δ2p fine-structure splitting energy, and only one-fourth of the anomaly in the Δ3p fine-structure splitting energy

  4. Polarization of photoneutrons from the threshold region of 208Pb

    International Nuclear Information System (INIS)

    Holt, R.J.; Jackson, H.E.

    1975-01-01

    In order to determine the parities of several resonances in 208 Pb, the polarization of photoneutrons from the 208 Pb(γ,n(pol)) 207 Pb reaction was measured. This represents the first measurement of the polarization of photoneutrons from resonances near threshold. The observations are tabulated. (SDF)

  5. Thermal modified Thomas-Fermi approximation with the Skyrme interaction for the 208Pb + 208Pb system

    International Nuclear Information System (INIS)

    Mansour, H.M.M.; Ismail, M.; Osman, M.; Ramadan, Kh.A.

    1988-01-01

    A generalization of the modified Thomas-Fermi (MTF) approximation to finite temperatures is used to calculate the optical potential for the 208 Pb + 208 Pb system using the energy density formalism derived from different effective forces of Skyrme type. The nuclear optical potential becomes more attractive when the temperature is increased. Pockets are also predicted in the total potential (Nuclear + Coulomb) wich depths are dependent on both the type of effective force and the temperature. 23 refs., 7 figs. (author)

  6. Structure of the giant dipole resonance in 208Pb

    International Nuclear Information System (INIS)

    El Naggar, N.M.

    1977-01-01

    A new scheme is devised to study the giant resonance in the heavy magic nucleus 208 Pb. The effect of the 4 + and 5 - collective excitations of the nucleus core is demonstrated. The calculated cross section is compared with the experimental data. (author)

  7. The direct neutron decay of giant resonances in 208Pb

    International Nuclear Information System (INIS)

    Bracco, A.

    1988-01-01

    The neutron decay of the giant multipole resonance region from 9 to 15 MeV of excitation energy in 208 Pb has been studied. Neutron branching ratios for the decay to the ground state and to the low-lying excited states of 207 Pb were measured as a function of the excitation energy of 208 Pb and compared to Hauser-Feshbach calculations. While the neutron branching ratios from the energy region of the isoscalar giant quadrupole resonance are reproduced by the calculations, the ratios from the energy region of the isoscalar giant monopole resonance show a conspicuous excess with respect to the statistical model predictions. The neutron yield from this energy region was analysed in terms of a multistep model of the compound nucleus which includes collective doorway channels. The total direct escape width as well as the associated direct partial escape widths to the lowest five valence hole states of 207 Pb were determined. (orig.)

  8. Statistical decay of giant monopole resonance in 208Pb

    International Nuclear Information System (INIS)

    Dias, H.; Wolynec, E.

    1984-01-01

    The neutron spectrum from the decay of the monopole giant resonance in 208 Pb is calculated using the known energy levels of 207 Pb. The particle vibrator model is used to assign spins parities to the measured 207 Pb levels, where these were not avaliable from experiments. The results of the Hauser-Feshbach calculation is in excellent agreement with the experimental spectrum, showing that the observed fast neutrons can be completely explained assuming a statistical decay. (Author) [pt

  9. Relativistic corrections to the elastic electron scattering from 208Pb

    International Nuclear Information System (INIS)

    Chandra, H.; Sauer, G.

    1976-01-01

    In the present work we have calculated the differential cross sections for the elastic electron scattering from 208 Pb using the charge distributions resulting from various corrections. The point proton and neutron mass distributions have been calculated from the spherical wave functions for 208 Pb obtained by Kolb et al. The relativistic correction to the nuclear charge distribution coming from the electromagnetic structure of the nucleon has been accomplished by assuming a linear superposition of Gaussian shapes for the proton and the neutron charge form factor. Results of this calculation are quite similar to an earlier calculation by Bertozzi et al., who have used a different wave function for 208 Pb and have assumed exponential smearing for the proton corresponding to the dipole fit for the form factor. Also in the present work, reason for the small spin orbit contribution to the effective charge distribution is discussed in some detail. It is also shown that the use of a single Gaussian shape for the proton smearing usually underestimates the actual theoretical cross section

  10. Compton scattering by mesons in nuclei: Experiment on 208Pb

    International Nuclear Information System (INIS)

    Fuhrberg, K.; Martin, G.; Haeger, D.; Ludwig, M.; Schumacher, M.; Andersson, B.E.; Blomqvist, K.I.; Ruijter, H.; Sandell, A.; Schroeder, B.; Hayward, E.; Nilsson, L.; Zorro, R.

    1992-01-01

    Using 58 and 73 MeV tagged photons and scattering angles from 60deg to 150deg, it is shown that is possible to observe Compton scattering by 'mesons in nuclei ' through an incomplete cancellation of the mesonic (exchange- current) seagull amplitude by parts of the nuclear resonance amplitude related to the giant-dipole resonance of 208 Pb. This phenomenon is a property of an extended nucleus and , therefore, cannot be dtudied on the deuteron. Predictions of the exchange form factor which determines the angular distribution of the exchange seagull amplitude are compared with experimental data. (orig.)

  11. Angular distributions of threshold photoneutrons from 208Pb

    International Nuclear Information System (INIS)

    Haacke, L.C.

    1973-01-01

    The shape of the 41 keV resonance in the 208 Pb(γ,n) 207 Pb reaction has been considered in some detail in view of recent reports of asymmetry interpreted in terms of interference between resonant and nonresonant neutron capture amplitudes. Additional threshold measurements were made using bremsstrahlung with an endpoint energy of 8.0 MeV. It has been concluded that asymmetry in the present data appears to be induced by the presence of an unresolved resonance, and that this interpretation of the resonance shape cannot be confuted on the basis of (n,γ) or total neutron cross section measurements made elsewhere. (author)

  12. Self-consistent calculation of 208Pb spectrum

    International Nuclear Information System (INIS)

    Pal'chik, V.V.; Pyatov, N.I.; Fayans, S.A.

    1981-01-01

    The self-consistent model with exact accounting for one-particle continuum is applied to calculate all discrete particle-hole natural parity states with 2 208 Pb nucleus (up to the neutron emission threshold, 7.4 MeV). Contributions to the energy-weighted sum rules S(EL) of the first collective levels and total contributions of all discrete levels are evaluated. Most strongly the collectivization is manifested for octupole states. With multipolarity growth L contributions of discrete levels are sharply reduced. The results are compared with other models and the experimental data obtained in (e, e'), (p, p') reactions and other data [ru

  13. 8B + 208Pb Elastic Scattering at Coulomb Barrier Energies

    Science.gov (United States)

    La Commara, M.; Mazzocco, M.; Boiano, A.; Boiano, C.; Manea, C.; Parascandolo, C.; Pierroutsakou, D.; Signorini, C.; Strano, E.; Torresi, D.; Yamaguchi, H.; Kahl, D.; Di Meo, P.; Grebosz, J.; Imai, N.; Hirayama, Y.; Ishiyama, H.; Iwasa, N.; Jeong, S. C.; Jia, H. M.; Kim, Y. H.; Kimura, S.; Kubono, S.; Lin, C. J.; Miyatake, H.; Mukai, M.; Nakao, T.; Nicoletto, M.; Sakaguchi, Y.; Sánchez-Benítez, A. M.; Soramel, F.; Teranishi, T.; Wakabayashi, Y.; Watanabe, Y. X.; Yang, L.; Yang, Y. Y.

    2018-02-01

    The scattering process of weakly-bound nuclei at Coulomb barrier energies provides deep insights on the reaction dynamics induced by exotic nuclei. Within this framework, we measured for the first time the scattering process of the short-lived Radioactive Ion Beam (RIB) 8B (Sp = 0.1375 MeV) from a 208Pb target at 50 MeV beam energy. The 8B RIB was produced by means of the in-flight facility CRIB (RIKEN, Japan) with an average intensity on target of 10 kHz and a purity about 25%. Elastically scattering ions were detected in the angular range θc.m. = 10°-160° by means of the detector array EXPADES. A preliminary optical model analysis indicates a total reaction cross section of about 1 b, a value, once reduced, 2-3 times larger than those obtained for the reactions induced by the stable weakly-bound projectiles 6,7Li on a 208Pb target in the energy range around the Coulomb barrier.

  14. Electroexcitation of giant multipole resonances in 208Pb

    International Nuclear Information System (INIS)

    Sasao, M.; Torizuka, Y.

    1977-01-01

    Electroexcitation of the nuclear continuum for 208 Pb at excitation energies up to 100 MeV has been measured at momentum transfers in the range from 0.45 to 1.2 fm -1 . Unfolding of the radiation tail was performed using a tail function which takes into account the multiple-photon emission effect. The spectra at these momentum transfers deviate significantly from the prediction of the Fermi-gas model but are consistent with the sum of the multipole strengths of the random-phase approximation; the excess cross section on the low excitation energy side indicates the excitation of multipole resonances. A series of 208 Pb spectra at low momentum transfers was expanded into E1, E2 (E0), E3, and higher multipole components using the q dependence of the Tassie model for isoscalar modes and the Goldhaber-Teller or Steinwedel-Jensen model for isovector modes. The giant dipole resonance thus obtained is consistent with that from photoreactions. Isoscalar and isovector giant quadrupole resonances are seen, respectively, at 11 and 22.5 MeV and an octupole resonance at 16 MeV. A monopole resonance is suggested at 13.5 MeV. The reduced 2 > 2 , B (E1), B (E2), and B (E3) consume most of the corresponding energy weighted sum rule if the q dependences of the Tassie and Goldhaber-Teller models are assumed. The results with these models are consistent with the random-phase approximation

  15. 208Pb(16O,15O)209Pb reaction

    International Nuclear Information System (INIS)

    Becchetti, F.D.; Harvey, B.G.; Kovar, D.; Mahoney, J.; Maguire, C.; Scott, D.K.

    1975-01-01

    The neutron levels in 209 Pb have been studied with the 208 Pb( 16 O, 15 O) reaction at a bomdarding energy of 139 MeV. Spectroscopic factors (S) have been deduced using a finite-range distorted-wave Born approximation (DWBA) with recoil. The 2g 9 / 2 , 1i 11 / 2 , 2g 7 / 2 , and 3d 3 / 2 levels are found to have S approximately-greater-than 0.9 while S approx. = 0.7 for the 1j 15 / 2 level at 1.4 MeV excitation. Evidence is found for other 1j 15 / 2 fragments being at 3.05 MeV and approx. 3.8 MeV with S approx. = 0.08 and 0.26, respectively, which would place the centroid of the 1j 15 / 2 level at E/subx/ approx. = 2.2 MeV. DWBA predicts a shift in the maxima of the angular distributions as a function of Q value which is not observed experimentally. A comparison with the proton transfer reaction 208 Pb( 16 O, 15 N) 209 Bi has been used to deduce the geometrical parameters of a neutron shell model potential appropriate for nuclei with A approximately-greater-than 200. The parameters of this Wood-Saxon potential are: V/subR/=-50.5 MeV,r/subR/=1.19 fm, a/subR/=0.75 fm, V)=-5.5 MeV, r)=1.01 fm, and a)=0.75 fm

  16. Direct neutron decay from the giant monopole resonance in 208Pb

    International Nuclear Information System (INIS)

    Bracco, A.; Beene, J.R.; Van Giai, N.; Bortignon, P.F.; Zardi, F.; Broglia, R.A.

    1988-01-01

    Experimental values of partial direct escape widths for the giant monopole resonance (GMR) in 208 Pb are presented and compared with predictions from various RPA models. It is found that different model Hamiltonians that reproduce equally well the energy and strength of the GMR in 208 Pb lead to direct escape width which may differ by a large factor. 1 tab

  17. Search for the two-phonon octupole vibrational state in {sup 208}Pb

    Energy Technology Data Exchange (ETDEWEB)

    Blumenthal, D.J.; Henning, W.; Janssens, R.V.F. [and others

    1995-08-01

    We performed an experiment to search for the two-phonon octupole vibrational state in {sup 208}Pb. Thick targets of {sup 208}Pb, {sup 209}Bi, {sup 58,64}Ni, and {sup 160}Gd were bombarded with 1305 MeV beams of were bombard {sup 208}Pb supplied by ATLAS. Gamma rays were detected using the Argonne-Notre Dame BGO gamma-ray facility, consisting of 12 Compton-suppressed germanium detectors surrounding an array of 50 BGO scintillators. We identified some 30 known gamma rays from {sup 208}Pb in the spectra gated by the 5{sup -} {yields} 3{sup -} and 3{sup -} {yields} 0{sup +} transitions in {sup 208}Pb. In addition, after unfolding these spectra for Compton response, we observed broad coincident structures in the energy region expected for the 2-phonon states. Furthermore, we confirmed the placement of a 2485 keV line observed previously in {sup 207}Pb and find no evidence consistent with the placement of this line in {sup 208}Pb. We are currently in the process of investigating the origin of the broadened lines observed in the spectra, extracting the excitation probability of states in {sup 208}Pb, and determining the relative probability of mutual excitation and neutron transfer in this reaction. An additional experiment is also being performed to collect much higher statistics germanium-germanium coincidence data for the thick {sup 208}Pb target.

  18. Study of fusion mechanism of halo nuclear 11Be+208Pb by applying QMD model

    International Nuclear Information System (INIS)

    Wang Ning; Li Zhuxia

    2001-01-01

    The authors have studied the fusion reaction for 11 Be + 208 Pb near barrier by applying QMD model, and find that in t he fusion reaction induced by halo nuclei there simultaneously exist two mechanisms competing with each other. On one hand, 11 Be is a weakly bound nuclear system and is easily broke up caused by the interaction with target, when it approaches to target, so the fusion cross section is suppressed. On the other hand, several neutrons of 11 Be transfer into 208 Pb and interact with 208 Pb to cause the local radius of 208 Pb increase and result in an enhancement of fusion cross section. The fusion cross sections calculated show an enhancement near barrier, and the calculated results agree with the experimental data reasonably well

  19. E2, E4 and E6 statistical decay spectra in 208Pb

    International Nuclear Information System (INIS)

    Teruya, N.; Wolynec, E.; Dias, H.

    1987-10-01

    Statistical decay spectra for the decay of giant resonances in 208 Pb are calculated using Hauser-Feshbach formalism and the experimental levels of the residual nucleus. The predicted decay spectra are compared with available experimental results. (author) [pt

  20. Absence of large M1 excitations in 208Pb below 8.4 MeV

    International Nuclear Information System (INIS)

    Holt, R.J.; Jackson, H.E.; Laszewski, R.M.; Specht, J.R.

    1979-01-01

    A very high-resolution measurement of the 208 Pb(γ-n 0 ) 207 Pb reaction was performed by use of the unique picopulse and the newly-installed neutron flight paths at the ANL electron linac facility. The 7.99-MeV resonance (E/sub n/ = 610 keV) exhibited a level-level interference pattern with the 7.98-MeV, E1 resonance in 208 Pb. 1 figure

  1. Study of fusion cross-sections of 16O + 208Pb and 28Si + 208Pb reactions by effective soft-core nucleon-nucleon interaction

    International Nuclear Information System (INIS)

    Ghodsi, O. N.; Mahmodi, M.; Ariai, J.; O. N. Ghodsi)

    2007-01-01

    In this paper, the cross-sections of fusion reactions 16 O + 208 Pb, 28 Si + 208 Pb, 40 C + 40 Ca, 40 Ca + 48 Ca, 58 Ni + 58 Ni, and 16 O + 154 Sm at bombarding energies above and near the fusion barrier have been investigated. The fusion cross-sections have been studied by means of the Monte Carlo method and effective soft-core nucleon-nucleon interaction. One adjustable parameter was used in these calculations. This parameter can change the strength and repulsive parts of soft-core potential values. It has to be adjusted, so that the analytical results are in acceptable agreement with the experimental data. In our calculations, we have taken the range of the nucleon-nucleon soft-core interaction to be constant and equal to that of the M3Y-Raid potential. Results show that the higher values for the diffusion parameter in the Woods-Saxon potential obtained from a careful analysis of 16 O + 208 Pb and 28 Si + 208 Pb reactions are due to the many particle effects on the nucleon-nucleon potential. (author)

  2. Study of fusion cross-sections of 16O + 208Pb and 28Si + 208Pb reactions by effective soft-core nucleon-nucleon interaction

    Directory of Open Access Journals (Sweden)

    Ghodsi Omid N.

    2007-01-01

    Full Text Available In this paper, the cross-sections of fusion reactions 16O + 208Pb, 28Si + 208Pb, 40C + + 40Ca, 40Ca + 48Ca, 58Ni + 58Ni, and 16O + 154Sm at bombarding energies above and near the fusion barrier have been investigated. The fusion cross-sections have been studied by means of the Monte Carlo method and effective soft-core nucleon-nucleon interaction. One adjustable parameter was used in these calculations. This parameter can change the strength and repulsive parts of soft-core potential values. It has to be adjusted, so that the analytical results are in acceptable agreement with the experimental data. In our calculations, we have taken the range of the nucleon-nucleon soft-core interaction to be constant and equal to that of the M3Y-Raid potential. Results show that the higher values for the diffusion parameter in the Woods-Saxon potential obtained from a careful analysis of 16O + 208Pb and 28Si + 208Pb reactions are due to the many particle effects on the nucleon-nucleon potential.

  3. Asymptotic three-particle approach to the Coulomb breakup process {sup 6}Li + {sup 208}Pb → {sup 208}Pb + α + d

    Energy Technology Data Exchange (ETDEWEB)

    Igamov, S. B., E-mail: igamov@inp.uz [Uzbek Academy of Sciences, Institute of Nuclear Physics (Uzbekistan)

    2017-03-15

    On the basis of the distorted-wave method, experimental data on the triple-differential cross section for the Coulomb breakup reaction {sup 208}Pb({sup 6}Li, αd){sup 208}Pb are analyzed by employing a correct expression for the final-state {sup 208}Pb–α–d three-particle Coulomb wave function. It is shown that the effect of final-state three-particle Coulomb dynamics can be used to assess the kinematical condition of clean Coulomb breakup processes. New values of the astrophysical S factor for the direct-radiative-capture reaction d(α, γ){sup 6}Li at ultralow energies in the range of 70 ≤ E{sub dα} ≤ 600 keV were extracted from experimental data. The value of S(0) = 1.60 ± 0.17 MeV nb was obtained.

  4. Study of the nuclear reactions 208Pb + 58Ni and 208Pb + 64Ni with a focusing time-of-flight spectrometer

    International Nuclear Information System (INIS)

    Sapotta, K.

    1983-01-01

    In the first part of this thesis the construction of a time-of-flight spectrometer for heavy ions with magnetic focusing is described. Then ion trajectories are calculated, and the effective spatial angle and the angular resolution are determined. In the second part the study of quasielastic transfer and deep inelastic reactions of 58 Ni and 64 Ni with 208 Pb at E=265 MeV respectively 260 MeV by means of this spectrometer is described. (HSI) [de

  5. Discerning the neutron density distribution of 208Pb from nucleon elastic scattering

    International Nuclear Information System (INIS)

    Karataglidis, S.; Amos, K.; University of Melbourne, VIC; Brown, B.A.; Deb, P.K.

    2001-01-01

    We seek a measure of the neutron density of 208 Pb from analyses of intermediate energy nucleon elastic scattering. The pertinent model for such analyses is based on coordinate space nonlocal optical potentials obtained from model nuclear ground state densities. As a calibration of the use of Skyrme-Hartree-Fock models the elastic scattering from 40 Cawas considered as well. Those potentials give predictions of integral observables and of angular distributions which show sensitivity to the neutron density. When compared with experiment, and correlated with analyses of electron scattering data, the results suggest that 208 Pb has a neutron skin thickness ∼ 0.17 fm

  6. Disentangling the transfer and breakup contributions for the inclusive 8 Li + 208 Pb reaction

    International Nuclear Information System (INIS)

    Moro, A.M.; Crespo, R.; Garcia M, H.; Aguilera, E.F.; Martinez Q, E.; Gomez C, J.; Nunes, F.M.

    2003-01-01

    An analysis of the 8 Li + 208 Pb reaction at energies around the Coulomb barrier is presented. The study is focused on the elastic and one-neutron removal channels. For the elastic scattering, an optical model analysis of the experimental data is performed. The observed 7 Li is interpreted as the superposition of the one-neutron transfer reaction, 208 Pb ( 8 Li, 7 Li) 209 Pb, and the breakup reaction. The separate contribution of each one of these processes has been calculated within the DWBA formalism. The sum of both contributions explains adequately the experimental angular distribution of 7 Li. (Author)

  7. Sensitivity of the electric dipole polarizability to the neutron skin thickness in {sup 208}Pb

    Energy Technology Data Exchange (ETDEWEB)

    Roca-Maza, X.; Agrawal, B. K.; Colo, G.; Nazarewicz, W.; Paar, N.; Piekarewicz, J.; Reinhard, P.-G.; Vretenar, D. [INFN, sezione di Milano, via Celoria 16, I-20133 Milano (Italy); Saha Institute of Nuclear Physics, Kolkata 700064 (India); Dipartimento di Fisica, Universita degli Studi di Milano and INFN, Sezione di Milano, 20133 Milano (Italy); Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 (United States) and Institute of Theoretical Physics, University of Warsaw, Hoza 69, PL-00-681 Warsaw (Poland); Physics Department, Faculty of Science, University of Zagreb, Zagreb (Croatia); Department of Physics, Florida State University, Tallahassee, FL 32306 (United States); Institut fuer Theoretische Physik II, Universitaet Erlangen-Nuernberg, Staudtstrasse 7, D-91058 Erlangen (Germany); Physics Department, Faculty of Science, University of Zagreb, Zagreb (Croatia)

    2012-10-20

    The static dipole polarizability, {alpha}{sub D}, in {sup 208}Pb has been recently measured with highresolution via proton inelastic scattering at the Research Center for Nuclear Physics (RCNP) [1]. This observable is thought to be intimately connected with the neutron skin thickness, r{sub skin}, of the same nucleus and, more fundamentally, it is believed to be associated with the density dependence of the nuclear symmetry energy. The impact of r{sub skin} on {alpha}{sub D} in {sup 208}Pb is investigated and discussed on the basis of a large and representative set of relativistic and non-relativistic nuclear energy density functionals (EDF) [2].

  8. Triple-differential cross section of the 208Pb(6Li, αd)208 Pb Coulomb breakup and astrophysical S-factor of the d(α,γ)6 Li reaction at extremely low energies

    International Nuclear Information System (INIS)

    Igamov, S.B.; Yarmukhamedov, R.

    1999-10-01

    A method of calculation of the triple-differential cross section of the 208 Pb( 6 Li, αd) 208 Pb Coulomb breakup at astrophysically relevant energies E of the relative motion of the breakup fragments, taking into account the three-body (α - d - 208 Pb) Coulomb effects and the contributions from the E1- and E2- multipoles, including their interference, has been proposed. The new results for the astrophysical S-factor of the direct radiative capture d(α, γ) 6 Li reaction at E ≤ 250 keV have been obtained. It is shown that the experimental triple-differential cross section of the 208 Pb( 6 Li, αd) 208 Pb Coulomb breakup can also be used to give information about the value of the modulus squared of the nuclear vertex constant for the virtual 6 Li → α + d. (author)

  9. Complete dipole response in 208Pb from high-resolution polarized proton scattering at 0 deg

    International Nuclear Information System (INIS)

    Neumann-Cosel, P. von; Kalmykov, Y.; Poltoratska, I.; Ponomarev, V. Yu.; Richter, A.; Wambach, J.; Adachi, T.; Fujita, Y.; Matsubara, H.; Sakemi, Y.; Shimizu, Y.; Tameshige, Y.; Yosoi, M.; Bertulani, C. A.; Carter, J.; Fujita, H.; Dozono, M.; Fujita, K.; Hashimoto, H.; Hatanaka, K.

    2009-01-01

    The structure of electric and magnetic dipole modes in 208 Pb is investigated in a high-resolution measurement of the (p-vector,p-vector') reaction under 0 deg. First results on the E1 strength in the region of the pygmy dipole resonance are reported.

  10. Structures excited by heavy ions in 208Pb target. Interpretation involving giant resonances and multiphonon excitations

    International Nuclear Information System (INIS)

    Chomaz, P.

    1984-01-01

    Kinetic energy spectra of heavy fragments from the 36Ar+208Pb reaction at 11 MeV/n and 20 Ne+ 208 Pb at 30 MeV/n have been measured with a time of flight spectrometer. Numerous structures ranging up to 100 MeV excitation energy are observed in the inelastic and few nucleon transfer channels. These structures are shown to be due to an excitation of the 208 Pb target nucleus and not to decay products of excited ejectiles. Positions of low lying structures (E* 208 Pb. The linear response of the target nucleus to the external field created by the projectile is calculated microscopically in the Random Phase Approximation resolved using the Green's function method in coordinate space with a Skyrme interaction. In the independant quasi-boson approximation multiple phonon excitations reproduce the main features of the experimental data and appear as a plausible interpretation of the observed structures. The theoretical calculations and experimental observations suggest that multiphonon excitations play an important role in heavy ion reactions and contribute strongly to the kinetic energy dissipation [fr

  11. Pionic 4f-3d X-rays from 208Pb and 209Bi

    International Nuclear Information System (INIS)

    Olin, A.; Forsman, J.W.; MacDonald, J.A.; Marshall, G.M.; Numao, T.; Poffenberger, P.R.; Van Esbroek, P.; Kunselman, A.R.; Olaniyi, B.H.

    1985-01-01

    The X-ray energies and widths of the pionic 4f-3d and 5g-4f transitions have been measured in 208 Pb and 209 Bi. The 3d widths obtained are in reasonable agreement with theory, and do not support the anomalously small values previously reported. (orig.)

  12. Production and identification of new, neutron-rich nuclei in the {sup 208}Pb region

    Energy Technology Data Exchange (ETDEWEB)

    Rykaczewski, K. [Oak Ridge National Lab., TN (United States). Physics Div.]|[ISOLDE-CERN, Geneva (Switzerland)]|[Univ. of Warsaw (Poland); Kurpeta, J.; Plochocki, A. [Univ. of Warsaw (Poland)] [and others

    1998-11-01

    The recently developed methods allowing the experimental studies on new neutron-rich nuclei beyond doubly-magic {sup 208}Pb are briefly described. An identification of new neutron-rich isotopes {sup 215}Pb and {sup 217}Bi, and new decay properties of {sup 216}Bi studied by means of a pulsed release element selective technique at PS Booster-ISOLDE are reported.

  13. Direct and statistical gamma decay of the giant quadrupole resonance of 208Pb

    International Nuclear Information System (INIS)

    Dias, H.; Hussein, M.S.; Carlson, B.V.; Merchant, A.C.

    1986-03-01

    The gamma decay of the giant quadrupole resonance of 208 Pb is discussed. The relative contribution of the decay via the compound nucleus is calculated from the statistical theory. It is found that the compound decay is as important as the direct decay. (Author) [pt

  14. Production and identification of new, neutron-rich nuclei in the 208Pb region

    International Nuclear Information System (INIS)

    Rykaczewski, K.; Kurpeta, J.; Plochocki, A.; Karny, M.; Szerypo, J.; Evensen, A.-H.; Kugler, E.; Lettry, J.; Ravn, H.; Duppen, P. van; Andreyev, A.; Huyse, M.; Woehr, A.; Jokinen, A.; Aeystoe, J.; Nieminen, A.; Huhta, M.; Ramdhane, M.; Walter, G.; Hoff, P.

    1998-01-01

    The recently developed methods allowing the experimental studies on new neutron-rich nuclei beyond doubly-magic 208 Pb are briefly described. An identification of new neutron-rich isotopes 215 Pb and 217 Bi, and new decay properties of 216 Bi studied by means of a pulsed release element selective technique at PS Booster-ISOLDE are reported

  15. Study of fragmentation potential for doubly magic 208Pb daughter cluster radioactivity

    International Nuclear Information System (INIS)

    Sukhmanpreet Kaur; Kaur, Mandeep; Singh, BirBikram

    2017-01-01

    In present work, the selected CR decays of different trans-lead parent nuclei are investigated within the collective clusterisation approach of quantum mechanical fragmentation theory (QMFT), specifically, which lead to 208 Pb daughter nucleus, always, through emission of clusters 14 C, 18,20 O, 22 Ne, 23 F, 24,26 Ne, 28,30 Mg and 34 Si

  16. Complete Electric Dipole Response and the Neutron Skin in 208Pb

    NARCIS (Netherlands)

    Tamii, A.; Poltoratska, I.; Neumann-Cosel, P. von; Fujita, Y.

    2011-01-01

    A benchmark experiment on 208Pb shows that polarized proton inelastic scattering at very forward angles including 0◦ is a powerful tool for high-resolution studies of electric dipole (E1) and spin magnetic dipole (M1) modes in nuclei over a broad excitation energy range to test up-to-date nuclear

  17. Study of the influence of color van der Waals forces and of non-Coulombian effects in 208pb+208pb scattering using a high-precision experiment

    International Nuclear Information System (INIS)

    Casandjian, Jean-Marc

    1996-01-01

    This work deals with the precise measurement of the absolute angular position of the elastic 208 pb+ 208 pb scattering cross section oscillations. The main objective is to verify if all of the elastic scattering ingredients are known even with an angular position precision of a few milli-degrees or if it is necessary to introduce new elements such as the color van der Waals force. This experiment was performed at Ganil. We obtained a precision of 0.004 deg. on the absolute cross section oscillation position and an angular shift of a few hundredths of degrees in relation to the expected position of a pure coulomb scattering. The attainment of this precision required particular precautions in the measurement of the absolute energy target position and scattering angle. First, the angular straggling on a thin target and the production of δ electrons during the scattering is studied. Next the origin of the angular shift is examined by the calculation of all the potentials that act during the scattering. The agreement between experimentation and theory allowed us to set a new limit on the color van der Waals interaction. (author) [fr

  18. Self-consistent Hartree-Fock RPA calculations in 208Pb

    Science.gov (United States)

    Taqi, Ali H.; Ali, Mohammed S.

    2018-01-01

    The nuclear structure of 208Pb is studied in the framework of the self-consistent random phase approximation (SCRPA). The Hartree-Fock mean field and single particle states are used to implement a completely SCRPA with Skyrme-type interactions. The Hamiltonian is diagonalised within a model space using five Skyrme parameter sets, namely LNS, SkI3, SkO, SkP and SLy4. In view of the huge number of the existing Skyrme-force parameterizations, the question remains which of them provide the best description of data. The approach attempts to accurately describe the structure of the spherical even-even nucleus 208Pb. To illustrate our approach, we compared the binding energy, charge density distribution, excitation energy levels scheme with the available experimental data. Moreover, we calculated isoscalar and isovector monopole, dipole, and quadrupole transition densities and strength functions.

  19. The dispersive optical model for n + [sup 208]Pb and n + [sup 209]Bi

    Energy Technology Data Exchange (ETDEWEB)

    Walter, R.L. (Dept. of Physics, Duke Univ., Durham, NC (United States) Triangle Univ. Nuclear Lab., Durham, NC (United States)); Weisel, G.J. (Dept. of Physics, Duke Univ., Durham, NC (United States) Triangle Univ. Nuclear Lab., Durham, NC (United States)); Das, R.K. (Dept. of Physics, Duke Univ., Durham, NC (United States) Triangle Univ. Nuclear Lab., Durham, NC (United States)); Tornow, W. (Dept. of Physics, Duke Univ., Durham, NC (United States) Triangle Univ. Nuclear Lab., Durham, NC (United States)); Howell, C.R. (Dept. of Physics, Duke Univ., Durham, NC (United States) Triangle Univ. Nuclear Lab., Durham, NC (United States))

    1993-06-01

    The dispersive optical model (DOM) provides a natural connection between the shell model potential for bound states and the optical model for nucleon scattering at positive energies. At TUNL we have developed DOMs for neutron scattering for ten nuclei between [sup 27]Al and [sup 209]Bi. In these studies we rely on TUNL measurements of differential cross-section ([sigma]([theta])) and analyzing power, as well as a wealth of [sigma]([theta]) and total cross section measurements from numerous other laboratories. In this paper we briefly outline the DOM method and the achievements in describing scattering data for n + [sup 208]Pb and n + [sup 209]Bi and single-particle bound-state data for neutrons in [sup 208]Pb. (orig.)

  20. Neutron skin of 208 Pb in consistency with neutron star observations

    CERN Document Server

    Miyazaki, K

    2007-01-01

    The renormalized meson-nucleon couplings are applied to the relativistic optical model of p-208Pb elastic scattering at T_{lab}=200MeV. We calculate the strength of the vector potential at nuclear center as varying the neutron radius of 208Pb. The neutron skin thickness S_{n} is determined in the comparison of the calculated potential with the phenomenological one. We find a value S_{n}=0.118fm being consistent with the astronomical observations of massive neutron stars (NSs), the standard scenario of NS cooling and the experimental nuclear symmetry energy in terrestrial laboratory. The value is complementary to the previous result S_{n}=0.119fm in the analysis of elastic scattering above T_{lab}=500MeV within the relativistic impulse optical model.

  1. Low energy 16O+208Pb elastic scattering: an attempt to analyze the microscopic effective potential

    International Nuclear Information System (INIS)

    Mau, N.V.; Ferrero, J.L.; Pacheco, J.C.; Bilwes, B.

    1991-03-01

    Elastic scattering of 16 O on 208 Pb is studied at 96, 104, 129.5, 192, 216.6 and 312.6 MeV. The 16 O+ 208 Pb potential is calculated first in the closure approximation model and compared to semi-phenomenological potentials. Then detailed contributions to the polarization real potential and to the imaginary potential due to the coupling of the elastic channels to the inelastic channels are calculated. The results are compared to the authors' model potential and used to test the main assumptions of the model. From that comparison a qualitative interpretation of the success of the model is proposed. At last the elastic scattering cross sections are calculated and compared to the data. (author) 41 refs., 6 figs., 5 tabs

  2. Correlated nucleon motion and fractional occupation of orbitals in 208Pb

    International Nuclear Information System (INIS)

    De Witt Huberts, Peter K.A.

    1999-01-01

    The low-energy states of nearly closed-shell nuclei can be interpreted as having quasi-particles in single-particle orbitals. The difference between physical particle and quasi particle, resulting from correlations, is quantified by the quasi-hole strength z that represents the probability of the quasi-particle being a physical particle. We present empirical evidence from quasi-free proton knockout with electrons for a substantially quenched z-value for the 3s orbital in 208 Pb. With z values derived from (e,e'p) and elastic electron-scattering data the absolute occupation for the 3s orbital in 208 Pb is derived. Results from both theory and experiment imply that only ∼ 2/3 of the nucleons act as independent particles bound in an average potential

  3. E2, E4, and E6 statistical decay spectra in 208Pb

    International Nuclear Information System (INIS)

    Teruya, N.; Wolynec, E.; Dias, H.

    1989-01-01

    Statistical decay spectra for the decay of giant resonances in 208 Pb by one neutron emission are calculated using the Hauser-Feshbach formalism and the experimental levels of the residual nucleus. The predicted decay spectra are compared with available experimental results. It is shown that the decay spectra are sensitive to multipole ad-mixtures of the excited state and can be used to study such admixtures. The available experimental data for the decay of the E2 resonances in 208 Pb contain spurious peaks that do not belong to the spectrum of 207 Pb. Theuuncertainty of the experimental data make it impossible to decide whether the decay is purely E2 or a mixture of 80% E2 plus 20% E6. (author) [pt

  4. Transverse energy production in 208Pb+Pb collisions at 158 GeV per nucleon

    International Nuclear Information System (INIS)

    Alber, T.; Appelshaeuser, H.; Baechler, J.; Bartke, J.; Bialkowska, H.; Bieser, F.; Bloomer, M.A.; Blyth, C.O.; Bock, R.; Bormann, C.; Brady, F.P.; Brockmann, R.; Buncic, P.; Caines, H.L.; Cebra, D.; Chan, P.; Cooper, G.E.; Cramer, J.G.; Cramer, P.B.; Csato, P.; Derado, I.; Dunn, J.; Eckardt, V.; Eckhardt, F.; Euler, S.; Ferguson, M.I.; Fischer, H.G.; Fodor, Z.; Foka, P.; Freund, P.; Fuchs, M.; Gal, J.; Gazdzicki, M.; Gladysz, E.; Grebieszkow, J.; Guenther, J.; Harris, J.W.; Heck, W.; Hegyi, S.; Hill, L.A.; Huang, I.; Howe, M.A.; Igo, G.; Irmscher, D.; Jacobs, P.; Jones, P.G.; Kadija, K.; Kecskemeti, J.; Kowalski, M.; Kuehmichel, A.; Lasiuk, B.; Margetis, S.; Mitchell, J.W.; Mock, A.; Nelson, J.M.; Odyniec, G.; Palinkas, J.; Palla, G.; Panagiotou, A.D.; Petridis, A.; Piper, A.; Poskanzer, A.M.; Prindle, D.J.; Puehlhofer, F.; Rauch, W.; Renfordt, R.; Retyk, W.; Ritter, H.G.; Roehrich, D.; Rudolph, H.; Runge, K.; Sandoval, A.; Sann, H.; Schaefer, E.; Schmitz, N.; Schoenfelder, S.; Seyboth, P.; Seyerlein, J.; Sikler, F.; Skrzypczak, E.; Stock, R.; Stroebele, H.; Szentpetery, I.; Sziklai, J.; Toy, M.; Trainor, T.A.; Trentalange, S.; Vassiliou, M.; Vesztergombi, G.; Vranic, D.; Wenig, S.; Whitten, C.; Wienold, T.; Wood, L.; Zimanyi, J.; Zhu, X.; Zybert, R.

    1995-01-01

    Measurements of the forward and the transverse energy in 158 GeV per nucleon 208 Pb+Pb collisions are presented. A total transverse energy of about 1 TeV is created in central collisions. An energy density of about 3GeV/fm 3 is estimated for near head-on collisions. Only statistical fluctuations are seen in the ratio of electromagnetic to hadronic transverse energy. copyright 1995 The American Physical Society

  5. Study of the threshold anomaly in the scattering of polarized 7Li from 208Pb

    International Nuclear Information System (INIS)

    Martel, I.; Gomez-Camacho, J.; Blyth, C.O.; Davis, N.J.; Rusek, K.; Connell, K.A.; Lilley, J.S.; Bailey, M.W.

    1995-01-01

    Experimental data on elastic and inelastic analysing powers T 20 and inelastic cross sections for the scattering of polarized 7 Li from a 208 Pb target are presented. The experimental data are analyzed with DWBA and coupled channels calculations, which show the sensitivity of the experimental data to the real and imaginary parts of the nuclear transition form factor. This study reveals the existence of a threshold anomaly for the transition terms of the interaction. ((orig.))

  6. The quadrupole moment of the first 3- state in 208Pb

    International Nuclear Information System (INIS)

    Joye, A.M.R.; Baxter, A.M.; Fewell, M.P.; Kean, D.C.; Spear, R.H.

    1977-04-01

    The B(E3; 0 + →3 - ) and quadrupole moment, Qsub(3 - ), of the first excited state of 208 Pb have been measured by the reorientation effect in Coulomb excitation, giving B(E3; 0 + →3 - ) = 0.665 +- E 2 B 3 and Qsub(3 - ) = -0.42 +- 0.32 EB. This value for Qsub(3 - ) is much smaller in magnitude than those obtained by Barnett et al., and is consistent with most theoretical predictions. (Author)

  7. Magnetic susceptibility and M1 transitions in /sup 208/Pb. [Sum rules

    Energy Technology Data Exchange (ETDEWEB)

    Traini, M; Lipparini, E; Orlandini, G; Stringari, S [Dipartimento di Matematica e Fisica, Universita di Trento, Italy

    1979-04-16

    M1 transitions in /sup 208/Pb are studied by evaluating energy-weighted and inverse energy-weighted sum-rules. The role of the nuclear interaction is widely discussed. It is shown that the nuclear potential increases the energy-weighted sum rule and lowers the inverse energy-weighted sum rule, with respect to the prediction of the pure shell model. Values of strengths and excitation energies are compared with experimental results and other theoretical calculations.

  8. Spreading effects on the isovector dipole strength distribution in 208Pb

    International Nuclear Information System (INIS)

    Adachi, S.; Nguyen van Giai

    1984-01-01

    There is seemingly a difficulty with all Hartree-Fock RPA calculations to describe correctly the distribution of dipole strength in heavy nuclei above the giant dipole region. We investigate in a consistent framework the effects of damping into more complex configurations. We show that in 208 Pb, this damping leads to a smooth distribution at higher energies while it gives a satisfactory description of the spreading width of the giant dipole resonance. (orig.)

  9. The 208Pb(7Li,6He)209Bi reaction at 52 MeV

    International Nuclear Information System (INIS)

    Zeller, A.F.; Weisser, D.C.; Ophel, T.R.; Hebbard, D.F.

    1979-11-01

    Single proton transfers to low lying levels in 209 Bi from the 208 Pb(7Li, 6 He) reaction at 52 MeV have been measured and spectroscopic factors derived from an EFR-DWBA analysis. Relative spectroscopic factors are in good agreement with light ion results and previous heavy ion work. Absolute spectroscopic factors were generally too large and the peaks of the angular distributions were out of phase with the DWBA calculations by 1 0 - 4 0

  10. A simple functional form for proton-208Pb total reaction cross sections

    International Nuclear Information System (INIS)

    Majumdar, S.; Deb, P.K.; Amos, K.

    2001-01-01

    A simple functional form has been found that gives a good representation of the total reaction cross sections for the scattering from 208 Pb of protons with energies in the range 30 to 300 MeV. The ratios of the total reaction cross sections calculated under this approximations compared well (to within a few percent) to those determined from the microscopic optical model potentials

  11. Cluster folding-model for quasi-elastic scattering of 23Na from 208Pb

    International Nuclear Information System (INIS)

    Kabir, A.; Johnson, R.C.; Tostevin, M.H.

    1991-01-01

    A cluster model of 23 Na is used to calculate the 23 Na-target interaction potentials by folding the cluster wavefunction with the cluster-target interaction potentials. Coupled channels calculations are carried out for the quasi-elastic scattering of polarized 23 Na from 208 Pb at 170 MeV and compared with recent experiments. Qualitative agreement with experiment is obtained when the interaction is adjusted by a single overall normalization constant. (author)

  12. Comment on ''Energy partition in near-barrier strongly damped collisions 58Ni+208Pb''

    International Nuclear Information System (INIS)

    Viola, V.E.; Kwiatkowski, K.; Breuer, H.; Planeta, R.

    1993-01-01

    Chatterjee et al. [Phys. Rev. C 44, R2249 (1991)] report that the sharing of dissipated energy in the 58 Ni + 208 Pb reaction at E/A=6.5 MeV is not influenced appreciably by the direction and magnitude of net charge (and mass) transfer. We point out that neither this conclusion nor one arguing for a correlation between mass flow and excitation energy division is supported by the data and analysis presented in their communication

  13. Nuclear structure from N ≅ Z to N > Z - 100Sn, 78Ni, 208Pb

    International Nuclear Information System (INIS)

    Grawe, H.; Gorska, M.; Rejmund, M.; Pfuetzner, M.; Brown, B.A.; Maier, K.H.

    1998-07-01

    The single particle (hole) energies in 100 Sn, as extrapolated by a shell model analysis of the neighbouring nuclei, show a remarkable similarity to those in 56 Ni, one major shell lower. This is borne out in nearly identical I π =2 + excitation energies, implying E(2 + )≅3 MeV in 100 Sn, and a large neutron effective E2 charge e≥1.6e. In contrast a small proton polarisation charge δe≤0.3e is found, pointing to a large isovector charge. In 104 Sn for the first time in this region strong E3 transitions with B(E3)≥17 Wu were identified, indicating E(3 - )≅3 MeV in 100 Sn. Isomer spectroscopy beyond 68 Ni following fragmentation of a 60.3 A MeV 86 Kr beam has provided first evidence on the neutron polarisation charge and the occupation of the νg 9/2 orbital beyond N=40, which is at variance with shell model calculations using realistic interactions. The N=40 subshell effect seen in E(2 + ) is not borne out in 2n separation energies. On the other hand the νg 9/2 -f 5/2 splitting of single quasiparticle energies in Ni, Fe and Cr isotopes, as deduced from M2 isomers, give no hint for deformation at Z 208 Pb a number of new isomers were observed in the fragmentation of a 1000 A MeV 238 U beam, while 3 - excitations on high spin configurations in and adjacent to 208 Pb were identified in inelastic collisions of 208 Pb+ 208 Pb. E2 and E3 strengths from stretched configurations are compared to model expectations. (orig.)

  14. THREE-VALENCE-PARTICE NUCLEI IN THE 132Sn and 208 Pb REGIONS

    International Nuclear Information System (INIS)

    Benchikh, L.; Draoui, B.; Latfaoui, M.; Aissaoui, L.

    2011-01-01

    Full text: Among the nuclei of the nuclear charter, the nuclei around closed shells play a key role in understanding the effective interaction properties between nucleons far from the valley of stability; particulary, the nuclei of a few valence nucleons around doubly magic 208 28Pb126 and 132 50Sn82 nuclei. The interest of both regions 208Pb and 132Sn lies in the fact that there is a great similarity between their nuclear spectroscopic properties. The single energy gaps in both cases are comparable and the orbitals above and below these gaps are similarly ordered. Each single state in the region of 132Sn has its counterpart in that of 208Pb. An interesting predictive consequence, the interactions of the Sn region, difficult region to reach experimentally, can be estimated from their corresponding ones constructed to describe the nuclei of the Pb region. Because of the importance of the similarity existing between the spectroscopy of these two regions, we are interested in nuclei with three valence nucleons in the lead and Tin regions on the basis of experimental data (spin, parity and energy states). In this context, the theoretical study is conducted within the shell model using the MSDI interaction for the energy spectra calculations of the studied nuclei. The calculated results are in good agreement with the available experimental data and show evidence that a close resemblance between the spectroscopy of these two regions persists when moving away from the immediate neighbours of doubly magic 132Sn and 208Pb.

  15. Phase-shift analysis of neutron-209Bi scattering and its comparison to neutron-208Pb scattering

    International Nuclear Information System (INIS)

    Chen, Z.P.; Tornow, W.; Walter, R.L.

    1995-01-01

    Published n- 209 Bi elastic differential cross-section, analyzing power, and total cross-section data in the energy range from 1.5 to 14 MeV were analyzed via a phase-shift analysis in order to find out whether these data show similar, unexplained resonance structures as observed recently for n- 208 Pb scattering. Although the n- 209 Bi and n- 208 Pb data are very similar, some of the phase shifts are quite different for the two systems. Only one resonancelike structure was observed for n- 209 Bi scattering in the excitation energy range from 9 to 18 MeV compared to eleven in the n- 208 Pb system, implying that n- 209 Bi data are probably more suitable than the classical n- 208 Pb system for detailed mean-field analyses approached through dispersion-relation optical models

  16. Coupled-channels analyses for 9,11Li + 208Pb fusion reactions with multi-neutron transfer couplings

    Science.gov (United States)

    Choi, Ki-Seok; Cheoun, Myung-Ki; So, W. Y.; Hagino, K.; Kim, K. S.

    2018-05-01

    We discuss the role of two-neutron transfer processes in the fusion reaction of the 9,11Li + 208Pb systems. We first analyze the 9Li + 208Pb reaction by taking into account the coupling to the 7Li + 210Pb channel. To this end, we assume that two neutrons are directly transferred to a single effective channel in 210Pb and solve the coupled-channels equations with the two channels. By adjusting the coupling strength and the effective Q-value, we successfully reproduce the experimental fusion cross sections for this system. We then analyze the 11Li + 208Pb reaction in a similar manner, that is, by taking into account three effective channels with 11Li + 208Pb, 9Li + 210Pb, and 7Li + 212Pb partitions. In order to take into account the halo structure of the 11Li nucleus, we construct the potential between 11Li and 208Pb with a double folding procedure, while we employ a Woods-Saxon type potential with the global Akyüz-Winther parameters for the other channels. Our calculation indicates that the multiple two-neutron transfer process plays a crucial role in the 11Li + 208Pb fusion reaction at energies around the Coulomb barrier.

  17. Decay of the isoscalar giant monopole resonance in 208Pb and 238U

    International Nuclear Information System (INIS)

    Woude, A. van der

    1985-01-01

    In this paper, the neutron decay of the giant monopole resonance (GMR) of 208 Pb and the alpha decay of the GMR of 238 U is studied. The GMR is excited by inelastic alpha-scattering at small angles (0-3deg) using 120 MeV alpha particles. The interference of other processes like the knock-out process with the particle decay of these resonances is considered. Coincidence neutron and alpha spectra are presented, as well as E2/E0 strength distributions. (Auth.)

  18. Nucleon transfer reactions to rotational states induced by 206,208PB projectiles

    International Nuclear Information System (INIS)

    Wollersheim, H.J.; DeBoer, F.W.N.; Emling, H.; Grein, H.; Grosse, E.; Spreng, W.; Eckert, G.; Elze, Th.W.; Stelzer, K.; Lauterbach, Ch.

    1986-01-01

    In a systematic study of nucleon transfer reactions accompanied by Coulomb excitation the authors bombarded 152 Sm, 160 Gd and 232 Th with 206, 208 Pb beams at incident energies close to the Coulomb barrier. Particle-gamma coincidence techniques were used to identify excited states of reaction products populated through inelastic scattering and in nucleon transfer reactions. Large cross sections were observed for one- and two-neutron pick-up from 232 Th at an incident energy of 6.4 MeV/μ. The results are analyzed in the framework of semiclassical models

  19. Electric dipole response of {sup 208}Pb and constraints on the symmetry energy

    Energy Technology Data Exchange (ETDEWEB)

    Tamii, A. [Research Center for Nuclear Physics, Osaka University, 10-1 Mihogaoka, Ibaraki 567-0047 (Japan)

    2014-05-02

    The electric dipole (E1) response of {sup 208}Pb has been precisely determined by measuring polarized proton inelastic scattering at very forward angles including zero degrees. The electric dipole polarizability, that is defined as the inverse energy-weighted sum rule of the E1 reduced transition strength, has been extracted as α{sub D} = 20.1 ±0.6 fm{sup 3}. A constraint band has been extracted in the plane of the symmetry energy (J) and its slope parameter (L) at the saturation density.

  20. Microscopic optical potential for 208Pb in the nuclear structure approach

    International Nuclear Information System (INIS)

    Bernard, V.; Nguyen Van Gai.

    1979-04-01

    The optical potential for nucleon- 208 Pb scattering below 30 MeV is calculated microscopically as the sum of a real Hartree-Fock term and a complex correction term arising from the coupling to excited states of the target. The Skyrme effective interaction is used to generate the Hartree-Fock field, the RPA excited states and the coupling. A complex local equivalent potential is defined and used to calculate scattering and absorption cross-sections. The real part of the optical potential is reasonably well described in this approach while the imaginary part is too weak. Inclusion of rearrangement processes could improve the agreement with experiment

  1. Fission threshold determination of 209Bi and sup(204,206,207,208)Pb by electrofission

    International Nuclear Information System (INIS)

    Tuerck, D.

    1975-01-01

    At the Darmstadt electron linear accelerator the cross sections for the electrofission of 209 Bi were measured for electron energies between 24 and 70 MeV, for the separated lead isotopes sup(204,206,207,208)Pb between 38 and 50 MeV. For the determination of the fission thresholds the cross sections were examined by the virtuel photon method using calculations in first Born approximation for the point nucleus with Coulomb wave functions. The analytic functions fitting the fission probability were based on level densities after the Fermi-gas-model. (orig./WL) [de

  2. Radiogenic lead with dominant content of {sup 208}Pb: New coolant and neutron moderator for innovative nuclear reactors

    Energy Technology Data Exchange (ETDEWEB)

    Shmelev, A. N.; Kulikov, G. G.; Kryuchkov, E. F.; Apse, V. A.; Kulikov, E. G. [National Research Nuclear Univ. MEPhI, Kashirskoe shosse, 31, 115409, Moscow (Russian Federation)

    2012-07-01

    The advantages of radiogenic lead with dominant content of {sup 208}Pb as a reactor coolant with respect to natural lead are caused by unique nuclear properties of {sup 208}Pb which is a double-magic nucleus with closed proton and neutron shells. This results in significantly lower micro cross section and resonance integral of radiative neutron capture by {sup 208}Pb than those for numerous light neutron moderators. The extremely weak ability of {sup 208}Pb to absorb neutrons results in the following effects. Firstly, neutron moderating factor (ratio of scattering to capture cross sections) is larger than that for graphite and light water. Secondly, age and diffusion length of thermal neutrons are larger than those for graphite, light and heavy water. Thirdly, neutron lifetime in {sup 208}Pb is comparable with that for graphite, beryllium and heavy water what could be important for safe reactor operation. The paper presents some results obtained in neutronics and thermal-hydraulics evaluations of the benefits from the use of radiogenic lead with dominant content of {sup 208}Pb instead of natural lead as a coolant of fast breeder reactors. The paper demonstrates that substitution of radiogenic lead for natural lead can offer the following benefits for operation of fast breeder reactors. Firstly, improvement of the reactor safety thanks to the better values of coolant temperature reactivity coefficient and, secondly, improvement of some thermal-hydraulic reactor parameters. Radiogenic lead can be extracted from thorium sludge without isotope separation as {sup 208}Pb is a final isotope in the decay chain of {sup 232}Th. (authors)

  3. Identification of rotating and vibrating tetrahedrons in the heavy nucleus {sup 208}Pb

    Energy Technology Data Exchange (ETDEWEB)

    Heusler, A.

    2017-11-15

    Ten known states in the heavy nucleus {sup 208}Pb at 2.6 < E{sub x} < 7.9 MeV are described by rotating and vibrating tetrahedrons. The 3{sup -} and 4{sup +} yrast states are the first members of the rotational band. A 2{sup ±} doublet state with the 2{sup +} yrast state as one member and the newly recognized 2{sup -} yrast state as the other member, the 1{sup -} yrast state, and the third 0{sup +} state are the heads of the three elementary tetrahedral rotating and vibrating bands. The newly recognized state at E{sub x} = 4142 keV was assigned spin 2 in 1975 and is suggested to have negative parity by the absent {sup 208}Pb(α, α{sup '}) excitation. Four more states at 5.7 < E{sub x} < 7.9 MeV are identified as the next members of the three elementary tetrahedral rotating and vibrating bands. The ambiguous spin assignment to the state at E{sub x} = 7020 keV is settled with 3{sup -}, the state at E{sub x} = 7137 keV is assigned 4{sup -}. (orig.)

  4. Capture reactions of 40Ca and 48Ca with targets of 197Au and 208Pb

    International Nuclear Information System (INIS)

    Stokstad, R.; Chan, Y.; Chavez, E.

    1988-03-01

    The reactions of 40 Ca and 48 Ca with targets of 197 Au and 208 Pb have been measured in the region from below the interaction barrier to about twice the barrier energy. The fission-like fragments were detected in a pair of position-sensitive, multi-wire proportional counters and were identified from measurements of position and time using two-body kinematics. In the region above the barrier the cross sections for capture are less than those given by the touching condition, indicating that an /open quotes/extra push/close quotes/ is required to induce capture. The observations for 40 Ca and 48 Ca show different fissilities for the onset of the extra push and indicate that charge equilibration may be an important factor governing capture reactions. Below the barrier the cross sections show an enhancement relative to the prediction for a one dimensional barrier. The enhancements are larger for 40 Ca than for 48 Ca (for both targets) and this is in qualitative agreement with predictions based on the coupling of the relative motion to low-lying collective states. Both above and below the barrier, we find that the change in the light partner, from 48 Ca to 40 Ca, has a larger effect on the cross sections than the change from 208 Pb to 197 Au, after correction for the change in the Coulomb barrier. 16 refs., 7 figs

  5. Two-phonon giant resonances in 136Xe, 208Pb, and 238U

    International Nuclear Information System (INIS)

    Boretzky, K.; Gruenschloss, A.; Ilievski, S.; Adrich, P.; Aumann, T.; Bertulani, C.A.; Cub, J.; Dostal, W.; Eberlein, B.; Elze, T.W.; Emling, H.; Fallot, M.; Holeczek, J.; Holzmann, R.; Kozhuharov, C.; Kratz, J.V.; Kulessa, R.; Leifels, Y.; Leistenschneider, A.; Lubkiewicz, E.; Mordechai, S.; Ohtsuki, T.; Reiter, P.; Simon, H.; Stelzer, K.; Stroth, J.; Suemmerer, K.; Surowiec, A.; Wajda, E.; Walus, W.

    2003-07-01

    The excitation of the double-phonon giant dipole resonance was observed in heavy projectile nuclei impinging on targets of high nuclear charge with energies of 500-700 MeV/nucleon. New experimental data are presented for 136 Xe and 238 U together with further analysis of earlier data on 208 Pb. Differential cross sections dσ/dE * and dσ/dθ for electromagnetic excitations were deduced. Depending on the isotope, cross sections appear to be enhanced in comparison to those expected from a purely harmonic nuclear dipole response. The cumulative effect of excitations of two-phonon states composed of one dipole and one quadrupole phonon, of predicted anharmoniticies in the double-phonon dipole response, and of damping of the dipole resonance during the collision may account for the discrepancy. In addition, decay properties of two-phonon resonances were studied and compared to that of a statistical decay. (orig.)

  6. 11Li Breakup on 208Pb at Energies Around the Coulomb Barrier

    DEFF Research Database (Denmark)

    Fernández-García, J.P.; Cubero, M.; Rodríguez-Gallardo, M.

    2013-01-01

    The inclusive breakup for the 11Li+208Pb reaction at energies around the Coulomb barrier has been measured for the first time. A sizable yield of 9Li following the 11Li dissociation has been observed, even at energies well below the Coulomb barrier. Using the first-order semiclassical perturbation...... theory of Coulomb excitation it is shown that the breakup probability data measured at small angles can be used to extract effective breakup energy as well as the slope of B(E1) distribution close to the threshold. Four-body continuum-discretized coupled-channels calculations, including both nuclear...... and Coulomb couplings between the target and projectile to all orders, reproduce the measured inclusive breakup cross sections and support the presence of a dipole resonance in the 11Li continuum at low excitation energy....

  7. Fragmentation of polarized 23Na on 208Pb and the random-walk model

    International Nuclear Information System (INIS)

    Clarke, N.M.; Karban, O.; Blyth, C.O.; Choi, H.D.; Hall, S.J.; Roman, S.; Tungate, G.; Cole, A.J.; Davis, N.J.; Shotter, A.C.; Connell, K.A.

    1993-01-01

    Inclusive measurements are presented for the differential cross sections and tensor analyzing powers ( TT 20 and T 20 ) of ions produced by the fragmentation of a beam of polarized 23 Na incident on a 208 Pb target at an energy of 195.5 MeV (8.5 MeV/nucleon). The data are discussed in terms of a simple ''shape-effect'' model, and compared to the predictions of the nuclear random-walk model which has been extended to the calculation of aligned, deformed projectiles. This model reproduces the principal features of the differential cross sections and the trends as a function of mass loss, but gives poorer agreement for the analyzing powers

  8. Reaction dynamics studies for the system 7Be + 208Pb at Coulomb barrier energies

    Directory of Open Access Journals (Sweden)

    Mazzocco M.

    2017-01-01

    Full Text Available The scattering process of the Radioactive Ion Beam 7Be from a 208Pb target was measured at three near-barrier energies. The quasi-elastic angular distributions were analyzed within the framework of the optical model to extract the reaction cross sections. The results are compared with those obtained for the reactions induced by the mirror projectile 7Li and by the lightest particle-stable lithium isotope 6Li on the same target. The angular distributions for the production of the two 7Be constituent clusters, namely 3He and 4He, were also measured. In agreement with what observed for the interaction of 7Be with lighter targets, the production of the heavier helium isotope resulted to be much more abundant than that of its lighter counterpart.

  9. Reaction dynamics studies for the system 7Be + 208Pb at Coulomb barrier energies

    Science.gov (United States)

    Mazzocco, M.; Boiano, A.; Boiano, C.; La Commara, M.; Manea, C.; Parascandolo, C.; Pierroutsakou, D.; Strano, E.; Torresi, D.; Acosta, L.; Di Meo, P.; Fernandez-Garcia, J. P.; Glodariu, T.; Grebosz, J.; Guglielmetti, A.; Marquinez-Duran, G.; Martel, I.; Nicoletto, M.; Pakou, A.; Sánchez-Benítez, A. M.; Sava, T.; Sgouros, O.; Signorini, C.; Soramel, F.; Soukeras, V.; Stroe, L.

    2017-11-01

    The scattering process of the Radioactive Ion Beam 7Be from a 208Pb target was measured at three near-barrier energies. The quasi-elastic angular distributions were analyzed within the framework of the optical model to extract the reaction cross sections. The results are compared with those obtained for the reactions induced by the mirror projectile 7Li and by the lightest particle-stable lithium isotope 6Li on the same target. The angular distributions for the production of the two 7Be constituent clusters, namely 3He and 4He, were also measured. In agreement with what observed for the interaction of 7Be with lighter targets, the production of the heavier helium isotope resulted to be much more abundant than that of its lighter counterpart.

  10. In-medium scaling law and electron scattering from high-spin states in 208Pb

    International Nuclear Information System (INIS)

    Arias de Saavedra, F.; Lallena, A.M.

    1994-01-01

    The effects of the environment modifications in the structure of the low-lying high-spin states of 208 Pb are studied by analyzing how the in-medium scaling law works on the excitation energies, wave functions, and electron scattering form factors corresponding to these states. It is shown that the consideration of f π * in addition to the effective ρ-meson mass does not affect too much most of the states analyzed. However, some of them appear to be extremely sensitive to its inclusion in the residual nucleon-nucleon interaction. As a result, a value of m ρ * /m ρ ∼f π * /f π ∼0.91 gives a good description of the (e,e') form factors of these particular states without any quenching factor. This value is in agreement with the one found for 48 Ca in a similar analysis performed in a previous work

  11. Proton-induced fission cross sections on "2"0"8Pb at high kinetic energies

    International Nuclear Information System (INIS)

    Rodriguez-Sanchez, J.L.; Benlliure, J.; Paradela, C.; Ayyad, Y.; Alvarez-Pol, H.; Cortina-Gil, D.; Pietras, B.; Ramos, D.; Vargas, J.; Taieb, J.; Chatillon, A.; Belier, G.; Boutoux, G.; Gorbinet, T.; Laurent, B.; Martin, J.F.; Pellereau, E.; Casarejos, E.; Rodriguez-Tajes, C.

    2014-01-01

    Total fission cross sections of "2"0"8Pb induced by protons have been determined at 370 A, 500 A, and 650 A MeV. The experiment was performed at GSI Darmstadt where the combined use of the inverse kinematics technique with an efficient detection setup allowed us to determine these cross sections with an uncertainty below 6%. This result was achieved by an accurate beam selection and registration of both fission fragments in coincidence which were also clearly distinguished from other reaction channels. These data solve existing discrepancies between previous measurements, providing new values for the Prokofiev systematics. The data also allow us to investigate the fission process at high excitation energies and small deformations. In particular, some fundamental questions about fission dynamics have been addressed, which are related to dissipative and transient time effects. (authors)

  12. Fragmentation of spin-dipole strength in {sup 90}Zr and {sup 208}Pb

    Energy Technology Data Exchange (ETDEWEB)

    Marketin, T., E-mail: marketin@phy.hr [GSI Helmholtzzentrum fuer Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt (Germany); Physics Department, Faculty of Science, University of Zagreb, 10000 Zagreb (Croatia); Litvinova, E. [ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum fuer Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt (Germany); Vretenar, D. [Physics Department, Faculty of Science, University of Zagreb, 10000 Zagreb (Croatia); Ring, P. [Physik-Department der Technischen Universitaet Muenchen, D-85748 Garching (Germany)

    2012-01-05

    An extension of time-dependent covariant density functional theory that includes particle-vibration coupling is applied to the charge-exchange channel. Spin-dipole excitation spectra are calculated an compared to available data for {sup 90}Zr and {sup 208}Pb. A significant fragmentation is found for all three angular-momentum components of the spin-dipole strength as a result of particle-vibration coupling, as well as a shift of a portion of the strength to higher energy. A high-energy tail is formed in the strength distribution that linearly decreases with energy. Using a model-independent sum rule, the corresponding neutron skin thickness is estimated and shown to be consistent with values obtained at the mean-field level.

  13. Fragmentation of spin-dipole strength in 90Zr and 208Pb

    International Nuclear Information System (INIS)

    Marketin, T.; Litvinova, E.; Vretenar, D.; Ring, P.

    2012-01-01

    An extension of time-dependent covariant density functional theory that includes particle-vibration coupling is applied to the charge-exchange channel. Spin-dipole excitation spectra are calculated an compared to available data for 90 Zr and 208 Pb. A significant fragmentation is found for all three angular-momentum components of the spin-dipole strength as a result of particle-vibration coupling, as well as a shift of a portion of the strength to higher energy. A high-energy tail is formed in the strength distribution that linearly decreases with energy. Using a model-independent sum rule, the corresponding neutron skin thickness is estimated and shown to be consistent with values obtained at the mean-field level.

  14. Elastic Neutron Scattering at 96 MeV from {sup 12}C and {sup 208}Pb

    Energy Technology Data Exchange (ETDEWEB)

    Klug, J.; Blomgren, J.; Atac, A. [and others

    2003-04-01

    A facility for detection of scattered neutrons in the energy interval 50-130 MeV, SCANDAL (SCAttered Nucleon Detection AssembLy), has recently been installed at the 20-180 MeV neutron beam line of the The Svedberg Laboratory, Uppsala. Elastic neutron scattering from {sup 12}C and {sup 208}Pb has been studied at 96 MeV in the 10-70 deg interval. The achieved energy resolution, 3.7 MeV, is about an order of magnitude better than for any previous experiment above 65 MeV incident energy. The present experiment represents the highest neutron energy where the ground state has been resolved from the first excited state in neutron scattering. A novel method for normalization of the absolute scale of the cross section has been used. The estimated uncertainty, 3 %, is unprecedented for a neutron-induced differential cross section measurement on a nuclear target. The results are compared with modern optical model predictions, based on phenomenology or microscopic nuclear theory.

  15. A nonlocal application of the dispersive optical model to 208Pb

    Science.gov (United States)

    Keim, M. A.; Mahzoon, M. H.; Atkinson, M. C.; Charity, R. J.; Dickhoff, W. H.

    2017-09-01

    A nonlocal application of the dispersive optical model to neutrons and protons in 208Pb is presented. A nucleon self-energy is described by parametrized real and imaginary parts connected through a dispersion relation. This parametrization includes nonlocal Hartree-Fock and local Coulomb and spin-orbit real terms, and nonlocal volume and surface and local spin-orbit imaginary terms. A simple Gaussian nonlocality is employed, and appropriate asymmetry parameters are included to describe the N-Z dependence of the nucleus. These parameters are constrained by fitting to experimental data, including particle numbers, energy levels, the charge density, elastic-scattering angular distributions, reaction cross sections, and the neutron total reaction cross section. From the resulting nucleon self-energy, the neutron matter distribution and neutron skin are deduced. This work was supported by the US Department of Energy, Division of Nuclear Physics under Grant DE-FG02-87ER-40316, the US National Science Foundation under Grants PHY-1304242 and PHY-1613362, and the Washington University Office of Undergraduate Research.

  16. Dispersive versus constant-geometry models of the neutron-208Pb mean field

    International Nuclear Information System (INIS)

    Mahaux, C.; Sartor, R.

    1990-01-01

    Phenomenological optical-model analyses of differential elastic scattering cross sections of neutrons by 208 Pb indicate that the radius of the real part of the potential decreases with increasing energy in the domain 4< E<40 MeV. On the other hand, the experimental total cross section is compatible with a real potential whose radial shape is energy independent. In order to clarify this situation, we compare a 'constant geometry' model whose real part has an energy-independent radial shape with a 'dispersive model' whose real part has an energy-dependent radial shape calculated from the dispersion relation which connects the real and imaginary parts of the field. The following three main features are considered. (i) The junction of the optical-model potential with the shell-model potential at negative energy. (ii) The agreement between the calculated total and differential cross sections and their experimental values. (iii) The extent to which the real part of the optical-model potential can be accurately determined by analyzing the total cross section only. It is concluded that the presently available experimental data support the existence of an energy dependence of the radial shape of the real potential, in keeping with the dispersion relation. A new parametrization of a 'dispersive' mean field is also presented. It does not involve more parameters than the previously published one but takes better account of the physical properties of the spectral functions; it is shown to improve the agreement between predicted and experimental scattering data. (orig.)

  17. New high spin states and isomers in the {sup 208}Pb and {sup 207}Pb nuclei

    Energy Technology Data Exchange (ETDEWEB)

    Broda, R.; Wrzesinski, J.; Pawlat, T. [and others

    1996-12-31

    The two most prominent examples of the heavy doubly closed shell (DCS) nuclei, {sup 208}Pb and {sup 132}Sn, are not accessible by conventional heavy-ion fusion processes populating high-spin states. This experimental difficulty obscured for a long time the investigation of yrast high-spin states in both DCS and neighboring nuclei and consequently restricted the study of the shell model in its most attractive regions. Recent technical development of multidetector gamma arrays opened new ways to exploit more complex nuclear processes which populate the nuclei of interest with suitable yields for gamma spectroscopy and involve population of moderately high spin states. This new possibility extended the range of accessible spin values and is a promising way to reach new yrast states. Some of these states are expected to be of high configurational purity and can be a source of important shell model parameters which possibly can be used later to check the validity of the spherical shell model description at yet higher spin and higher excitation energy. The nuclei in the closest vicinity of {sup 132}Sn are produced in spontaneous fission and states with spin values up to I=14 can be reached in fission gamma spectroscopy studies with the presently achieved sensitivity of gamma arrays. New results on yrast states in the {sup 134}Te and {sup 135}I nuclei populated in fission of the {sup 248}Cm presented at this conference illustrate such application of the resolving power offered by modern gamma techniques.

  18. Isomers in neutron-rich A ∼ 190 nuclides from 208Pb fragmentation

    International Nuclear Information System (INIS)

    Rykaczewski, Krzysztof Piotr; Caamano, M.; Banu, A.; Walker, P.M.; Morton, N.H.; Regan, P. H.; Regan, Patrick H; Pfutzner, M.; Podolyak, Zs.; Gerl, J.; Hellstrom, M.; Mayet, P.; Miernik, K.; Mineva, M.N.; Aprahamian, A.; Benlliure, J.; Bruce, A.M.; Butler, P.A.; Cortina Gil, D.; Cullen, D.M.; Doring, J.; Enqvist, T.; Fox, C.; Garces Narro, J.; Geissel, H.; Gelletly, W.; Giovinazzo, J.; Gorska, M.; Grawe, H.; Grzywacz, R.; Kleinbohl, A.; Korten, W.; Lewitowicz, M.; Lucas, R.; Mach, H.; O'Leary, C.D.; De Oliveira, F.; Pearson, C.J.; Rejmund, F.

    2004-01-01

    Relativistic projectile fragmentation of 208 Pb has been used to produce isomers in neutron-rich, A ∼ 190 nuclides. A forward-focusing spectrometer provided ion-by-ion mass and charge identification. The detection of gamma-rays emitted by stopped ions has led to the assignment of isomers in 188 Ta, 190 W, 192 Re, 193 Re, 195 Os, 197 Ir, 198 Ir, 200 Pt, 201 Pt, 202 Pt and 203 Au, with half-lives ranging from approximately 10 ns to 1 ms. Tentative isomer information has been found also for 174 Er, 175 Er, 185 Hf, 191 Re, 194 Re and 199 Ir. In most cases, time-correlated, singles gamma-ray events provided the first spectroscopic data on excited states for each nuclide. In 200 Pt and 201 Pt, the assignments are supported by gamma-gamma coincidences. Isomeric ratios provide additional information, such as half-life and transition energy constraints in particular cases. The level structures of the platinum isotopes are discussed, and comparisons are made with isomer systematics

  19. Direct reactions induced by 16O on 208Pb at high incident energy

    International Nuclear Information System (INIS)

    Mermaz, M.C.

    1978-01-01

    Direct reactions induced by 16 O mainly on 208 Pb at 20 MeV/nucleon are reviewed. The quasi-elastic transfer reaction, such as one-proton and one-neutron transfer respectively leading to 209 Bi and 209 Pb single-particle-states, is first discussed, the fragmentation of 16 O projectile on heavy targets is then envisaged. The one-nucleon transfer can be described within the framework of one-step processes using the DWBA formalism to calculate the cross sections. At high incident energy (312.6 MeV), transfer reactions involving nucleons from the deeper 1p 3/2 orbit of 16 O are kinematically favoured and well observed. At 20 MeV/A and above, a large part of the reaction cross sections seems to be due to the fragmentation of the projectile; more especially, an abrasion-ablation model have to be used in order to explain the general trend of the data (energy spectra and angular distribution)

  20. Electric dipole excitation of {sup 208}Pb by polarized electron impact

    Energy Technology Data Exchange (ETDEWEB)

    Jakubassa-Amundsen, D.H. [University of Munich, Mathematics Institute, Munich (Germany); Ponomarev, V.Yu. [Technische Universitaet Darmstadt, Institut fuer Kernphysik, Darmstadt (Germany)

    2016-03-15

    The cross sections and spin asymmetries for the excitation of 1{sup -} states in {sup 208}Pb by transversely polarized electrons with collision energy of 30-180MeV have been examined within the DWBA scattering formalism. As examples, we have considered a low-lying 1{sup -} state and also states belonging to the pygmy dipole and giant dipole resonances. The structure of these states and their corresponding transition charge and current densities have been taken from an RPA calculation within the quasiparticle phonon model. The complex-plane rotation method has been applied to achieve the convergence of the radial DWBA integrals for backward scattering. We have studied the behaviour of the cross sections and spin asymmetries as a function of electron energy and scattering angle. The role of the longitudinal and transversal contributions to the excitation has been thoroughly studied. We conclude that the spin asymmetry S, related to unpolarized outgoing electrons, is mostly well below 1% even at the backward scattering angles and its measurement provides a challenge for future experiments with polarized electrons. (orig.)

  1. Beam losses from ultraperipheral nuclear collisions between ^{208}Pb^{82+} ions in the Large Hadron Collider and their alleviation

    Directory of Open Access Journals (Sweden)

    R. Bruce

    2009-07-01

    Full Text Available Electromagnetic interactions between colliding heavy ions at the Large Hadron Collider (LHC at CERN will give rise to localized beam losses that may quench superconducting magnets, apart from contributing significantly to the luminosity decay. To quantify their impact on the operation of the collider, we have used a three-step simulation approach, which consists of optical tracking, a Monte Carlo shower simulation, and a thermal network model of the heat flow inside a magnet. We present simulation results for the case of ^{208}Pb^{82+} ion operation in the LHC, with focus on the ALICE interaction region, and show that the expected heat load during nominal ^{208}Pb^{82+} operation is 40% above the quench level. This limits the maximum achievable luminosity. Furthermore, we discuss methods of monitoring the losses and possible ways to alleviate their effect.

  2. Complete dipole strength distributions in 208Pb from high-resolution polarized proton scattering at 0°

    International Nuclear Information System (INIS)

    Von Neumann-Cosel, Peter

    2012-01-01

    Small-angle polarized proton scattering including 0° at incident energies of a few 100 MeV/nucleon is established as a new spectrospcopic tool for the study of E1 and M1 strength distributions. Experiments of this type have been realized recently at RCNP, Osaka, Japan with high energy resolution of the order 25 - 30 keV (FWHM). Using 208 Pb as an example, the physics potential of such data is discussed. It includes information on the properties of the Pygmy Dipole Resonance but also on complete E1 and M1 strength distributions and thus the gamma strength function. The E1 polarizability can be extracted with a precision of about 4% providing important experimental constraints on the neutron skin thickness in 208 Pb.

  3. Isospin character of low-lying pygmy dipole states in 208Pb via inelastic scattering of 17O ions.

    Science.gov (United States)

    Crespi, F C L; Bracco, A; Nicolini, R; Mengoni, D; Pellegri, L; Lanza, E G; Leoni, S; Maj, A; Kmiecik, M; Avigo, R; Benzoni, G; Blasi, N; Boiano, C; Bottoni, S; Brambilla, S; Camera, F; Ceruti, S; Giaz, A; Million, B; Morales, A I; Vandone, V; Wieland, O; Bednarczyk, P; Ciemała, M; Grebosz, J; Krzysiek, M; Mazurek, K; Zieblinski, M; Bazzacco, D; Bellato, M; Birkenbach, B; Bortolato, D; Calore, E; Cederwall, B; Charles, L; de Angelis, G; Désesquelles, P; Eberth, J; Farnea, E; Gadea, A; Görgen, A; Gottardo, A; Isocrate, R; Jolie, J; Jungclaus, A; Karkour, N; Korten, W; Menegazzo, R; Michelagnoli, C; Molini, P; Napoli, D R; Pullia, A; Recchia, F; Reiter, P; Rosso, D; Sahin, E; Salsac, M D; Siebeck, B; Siem, S; Simpson, J; Söderström, P-A; Stezowski, O; Theisen, Ch; Ur, C; Valiente-Dobón, J J

    2014-07-04

    The properties of pygmy dipole states in 208Pb were investigated using the 208Pb(17O, 17O'γ) reaction at 340 MeV and measuring the γ decay with high resolution with the AGATA demonstrator array. Cross sections and angular distributions of the emitted γ rays and of the scattered particles were measured. The results are compared with (γ, γ') and (p, p') data. The data analysis with the distorted wave Born approximation approach gives a good description of the elastic scattering and of the inelastic excitation of the 2+ and 3- states. For the dipole transitions a form factor obtained by folding a microscopically calculated transition density was used for the first time. This has allowed us to extract the isoscalar component of the 1- excited states from 4 to 8 MeV.

  4. Is the simultaneous pick-up mechanism predominant in hte 208Pb(p, t) 3+ transition

    International Nuclear Information System (INIS)

    Igarashi, Masamichi; Kubo, Ken-ichi.

    1981-01-01

    The roles of simultaneous (one-step) and sequential (two-step) transfer processes in the reaction 208 Pb(p, t) 206 Pb(3 + , 1.34 MeV.) are investigated. Both processes are accurately evaluated employing realistic wave functions and finite-range interactions. The sequential transfer process is found to be dominant in this reaction, contrary to the conclusion of Nagarajan et al. The comparison of the polarization asymmetry calculation with the data confirms this result. (author)

  5. Study of elastic pion scattering from 9Be, 28Si, 58Ni, and 208Pb at 162 MeV

    International Nuclear Information System (INIS)

    Devereux, M.J.

    1979-05-01

    Elastic pion scattering from 9 Be, 28 Si, 58 Ni, and 208 Pb at 162 MeV is analyzed and compared with an optical model theory which incorporates a pion--nucleon range. Excellent fits to the data are obtained in all but one case. The fitted values of the pion--nucleon range, as well as other fitted values are listed. 108 references

  6. Experimental Cross Sections for Reactions of Heavy Ions and 208Pb, 209Bi, 238U, and 248Cm Targets

    International Nuclear Information System (INIS)

    Patin, Joshua B.

    2002-01-01

    The study of the reactions between heavy ions and 208 Pb, 209 Bi, 238 U, and 248 Cm targets was performed to look at the differences between the cross sections of hot and cold fusion reactions. Experimental cross sections were compared with predictions from statistical computer codes to evaluate the effectiveness of the computer code in predicting production cross sections. Hot fusion reactions were studied with the MG system, catcher foil techniques and the Berkeley Gas-filled Separator (BGS). 3n- and 4n-exit channel production cross sections were obtained for the 238 U( 18 O,xn) 256-x Fm, 238 U( 22 Ne,xn) 260-x No, and 248 Cm( 15 N,xn) 263-x Lr reactions and are similar to previous experimental results. The experimental cross sections were accurately modeled by the predictions of the HIVAP code using the Reisdorf and Schaedel parameters and are consistent with the existing systematics of 4n exit channel reaction products. Cold fusion reactions were examined using the BGS. The 208 Pb( 48 Ca,xn) 256-x No, 208 Pb( 50 Ti,xn) 258-x Rf, 208 Pb( 51 V,xn) 259-x Db, 209 Bi( 50 Ti,xn) 259-x Db, and 209 Bi( 51 V,xn) 260-x Sg reactions were studied. The experimental production cross sections are in agreement with the results observed in previous experiments. It was necessary to slightly alter the Reisdorf and Schaedel parameters for use in the HIVAP code in order to more accurately model the experimental data. The cold fusion experimental results are in agreement with current 1n- and 2n-exit channel systematics

  7. Radiogenic Lead with Dominant Content of 208Pb: New Coolant and Neutron Moderator for Innovative Nuclear Facilities

    Directory of Open Access Journals (Sweden)

    A. N. Shmelev

    2011-01-01

    Full Text Available As a rule materials of small atomic weight (light and heavy water, graphite, and so on are used as neutron moderators and reflectors. A new very heavy atomic weight moderator is proposed—radiogenic lead consisting mainly of isotope 208Pb. It is characterized by extremely low neutron radiative capture cross-section (0.23 mbarn for thermal neutrons, i.e., less than that for graphite and deuterium and highest albedo of thermal neutrons. It is evaluated that the use of radiogenic lead makes it possible to slow down the chain fission reaction on prompt neutrons in a fast reactor. This can increase safety of the fast reactors and reduce as well requirements pertaining to the fuel fabrication technology. Radiogenic lead with high 208Pb content as a liquid-metal coolant of fast reactors helps to achieve a favorable (negative reactivity coefficient on coolant temperature. It is noteworthy that radiogenic lead with high 208Pb content may be extracted from thorium (as well as thorium-uranium ores without isotope separation. This has been confirmed experimentally by the investigations performed at San Paulo University, Brazil.

  8. 208Pb(n,pxnγ) reactions for neutron energies up to 200 MeV

    International Nuclear Information System (INIS)

    Pavlik, A.; Vonach, H.

    1995-01-01

    The prompt gamma-radiation from the interaction of fast neutrons with enriched samples of 208 Pb was measured using the white neutron beam of the WNR facility at Los Alamos National Laboratory. The samples were positioned at about 40 m distance from the neutron production target. The spectra of the emitted gamma-rays were measured with a high-resolution HPGe detector. The incident neutron energy was determined by the time-of-flight method and the neutron fluence was measured with a 238 U fission chamber. In addition to the primary purpose of this experiment, the study of (n,xnγ) reactions leading to various lead isotopes, gamma transitions in the residual nuclei 207,205,203,201 Tl were analyzed. From these data gamma-production cross sections in the neutron energy range from the effective thresholds to 200 MeV were derived. The lines for the analysis had to be chosen carefully as the (n,pnxγ) cross sections are rather small and the interference with unresolved lead lines (even weak ones) would cause significant errors. The effect due to isomers with half-lives exceeding a few nanoseconds was taken into account and corrected for, if necessary. The measured cross sections were compared with the results of nuclear model calculations based on the exciton model for preequilibrium particle emission and the Hauser-Feshbach theory for compound nucleus decay. Unlike in the case of (n,xnγ) reactions the calculated results in general did not give a good description of the measured cross sections

  9. Electroproduction of charged pions from 1H, 2H, 40Ca and 208Pb

    International Nuclear Information System (INIS)

    Badalyan, N.N.; Badalyan, R.G.; Chubaryan, M.Ya.

    1994-01-01

    In deep inelastic scattering at squared four- momentum transfers Q 2 >> m c 2 , where the mass m Q of the additive quark is m c ≅ m Q ∼ 0,3 GeV, the virtual photon can transfer its energy to the quark during a time interval τ P ≅ ν/Q 2 . With respect to perturbative QCD, the cross section for this process is ∼ 1/Q 2 ; moreover, during the time interval τ F ≅ ν/m c 2 >> ν P , the point-like configuration must transform into a normal-sized hadron. Between the time interval τ P F , this point-like quark or quark-gluon configuration can interact with nuclear matter with only small cross section. Such a delayed hadronization mechanism will increase the yield of hadrons (in particular, π + -mesons) relative to the case when hadron production can take place at the virtual-photon quark interaction point. This hadronization process can be studied at energies available after the first energy upgrade at CEBAF; namely, at a beam energy of 6.00 GeV. We propose to measure in Hall A the inclusive electroproduction of π ± -mesons on 1 H and π + -mesons on 2 H, 40 Ca and 208 Pb utilizing the (e, e'π ± ) reaction for 1.0 ≤ Q 2 (GeV/c) 2 ≤2.5, at an invariant energy W > 1.92 GeV and at x B = 0.3. From a Q 2 -dependent analysis of the nuclear matter transparency, we can extract information about the space-time scale for the mechanism of quark hadronization. 65 refs., 21 figs., 6 tabs

  10. Neutron scattering from 208Pb at 30.4 and 40.0 MeV and isospin dependence of the nucleon optical potential

    Science.gov (United States)

    Devito, R. P.; Khoa, Dao T.; Austin, Sam M.; Berg, U. E. P.; Loc, Bui Minh

    2012-02-01

    Background: Analysis of data involving nuclei far from stability often requires the optical potential (OP) for neutron scattering. Because neutron data are seldom available, whereas proton scattering data are more abundant, it is useful to have estimates of the difference of the neutron and proton optical potentials. This information is contained in the isospin dependence of the nucleon OP. Here we attempt to provide it for the nucleon-208Pb system.Purpose: The goal of this paper is to obtain accurate n+208Pb scattering data and use it, together with existing p+208Pb and 208Pb(p,n)208BiIAS* data, to obtain an accurate estimate of the isospin dependence of the nucleon OP at energies in the 30-60-MeV range.Method: Cross sections for n+208Pb scattering were measured at 30.4 and 40.0 MeV, with a typical relative (normalization) accuracy of 2-4% (3%). An angular range of 15∘ to 130∘ was covered using the beam-swinger time-of-flight system at Michigan State University. These data were analyzed by a consistent optical-model study of the neutron data and of elastic p+208Pb scattering at 45 and 54 MeV. These results were combined with a coupled-channel analysis of the 208Pb(p,n) reaction at 45 MeV, exciting the 0+ isobaric analog state (IAS) in 208Bi.Results: The new data and analysis give an accurate estimate of the isospin impurity of the nucleon-208Pb OP at 30.4 MeV caused by the Coulomb correction to the proton OP. The corrections to the real proton OP given by the CH89 global systematics were found to be only a few percent, whereas for the imaginary potential it was greater than 20% at the nuclear surface. On the basis of the analysis of the measured elastic n+208Pb data at 40 MeV, a Coulomb correction of similar strength and shape was also predicted for the p+208Pb OP at energies around 54 MeV.Conclusions: Accurate neutron scattering data can be used in combination with proton scattering data and (p,n) charge exchange data leading to the IAS to obtain reliable

  11. (π±, π±' N) reactions on 12C and 208Pb near the giant resonance region

    International Nuclear Information System (INIS)

    Yoo, Sung Hoon.

    1990-05-01

    Angular distributions for the 12 C(π ± , π ± ' p) and 208 Pb(π ± , π ± ' p or n) reactions near the giant resonance region have been measured at T π = 180 MeV, and found different between π + and π - data. This observation is interpreted as evidence for different excitation mechanisms dominating the π - -nucleus and π + -nucleus interactions in the giant resonance region of these targets. A comparison with the single-nucleon knock-out distorted-wave impulse approximation calculations shows, even though these calculations underestimate (π ± , π ± ' N) data for both targets, the dominance of direct process for (π + , π + ' p) or (π - , π - ' n) in contrast to (π - , π - ' p) or (π + , π + ' n). In the (π + , π + ' p) reaction proton-proton hole states are excited directly and appear to have a large probability for direct decay with escape width, whereas in (π - , π - ' p) the preferentially excited neutron-neutron hole doorway states couple to resonance states and decay with spreading width. This interpretation led us to suggest that the ratio of cross-sections for inelastic scattering to the giant resonance region should be written in terms of an incoherent sum of cross-sections to neutron and proton doorway states. In a heavy nucleus such as 208 Pb, neutron and proton doorway states. In a heavy nucleus such as 208 Pb, neutron and proton doorway states contribute incoherently because the different decay processes do not populate the same final states of the residual nucleus

  12. Isotopic yields and kinetic energies of primary residues in 1 A GeV 208Pb + p reactions

    International Nuclear Information System (INIS)

    Enqvist, T.; Wlazlo, W.; Armbruster, P.

    2000-09-01

    The production of primary residual nuclei in the reaction 1 A GeV 208 Pb on proton has been studied by measuring isotopic distributions for all elements from titanium (Z=22) to lead (Z=82). Kinematical properties of the residues were also determined and used to disentangle the relevant reaction mechanisms, spallation (projectile fragmentation) and fission. The fragment separator FRS at GSI, Darmstadt, was used to separate and identify the reaction products. The measured production cross sections are highly relevant for the design of accelerator-driven subcritical reactors and for the planning of future radioactive-beam facilities. (orig.)

  13. Description of nucleon scattering on 208Pb by a fully Lane-consistent dispersive spherical optical model potential

    Science.gov (United States)

    Sun, W. L.; Wang, J.; Soukhovitskii, E. Sh.; Capote, R.; Quesada, J. M.

    2017-09-01

    A fully Lane-consistent dispersive spherical optical potential is proposed to describe nucleon scattering interaction with doubly magic nucleus 208Pb up to 200 MeV. The experimental neutron total cross sections, elastically scattered nucleon angular distributions and (p,n) data had been used to search the potential parameters. Good agreement between experiments and the calculations with this potential is observed. Meanwhile, the application of the determined optical potential with the same parameters to neighbouring near magic Pb-Bi isotopes is also examined to show the predictive power of this potential.

  14. Long range absorption in the scattering of 6He on 208Pb and 197Au at 27 MeV

    International Nuclear Information System (INIS)

    Kakuee, O.R.; Alvarez, M.A.G.; Andres, M.V.; Cherubini, S.; Davinson, T.; Di Pietro, A.; Galster, W.; Gomez-Camacho, J.; Laird, A.M.; Lamehi-Rachti, M.; Martel, I.; Moro, A.M.; Rahighi, J.; Sanchez-Benitez, A.M.; Shotter, A.C.; Smith, W.B.; Vervier, J.; Woods, P.J.

    2006-01-01

    Quasi-elastic scattering of 6 He at E lab =27 MeV from 197 Au has been measured in the angular range of 6 o -72 o in the laboratory system employing LEDA and LAMP detection systems. These data, along previously analysed data of 6 He+ 208 Pb at the same energy, are analysed using optical model calculations. The role of Coulomb dipole polarizability has been investigated. Large imaginary diffuseness parameters are required to fit the data. This result is an evidence for long range absorption mechanisms in 6 He induced reactions

  15. Study of the elastic scattering of {sup 6}He on {sup 208}Pb at energies around the Coulomb barrier

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez-Benitez, A.M. [Departamento de Fisica Aplicada, Universidad de Huelva, E-21071 Huelva (Spain); Centre de Recherches du Cyclotron, Universite Catholique de Louvain, B-1348 Louvain-la-Neuve (Belgium); Escrig, D. [Instituto de Estructura de la Materia, CSIC, E-28006 Madrid (Spain); Alvarez, M.A.G.; Andres, M.V. [Departamento de Fisica Atomica, Molecular y Nuclear, Universidad de Sevilla, E-41080 Sevilla (Spain); Angulo, C. [Centre de Recherches du Cyclotron, Universite Catholique de Louvain, B-1348 Louvain-la-Neuve (Belgium); Borge, M.J.G. [Instituto de Estructura de la Materia, CSIC, E-28006 Madrid (Spain); Cabrera, J. [Centre de Recherches du Cyclotron, Universite Catholique de Louvain, B-1348 Louvain-la-Neuve (Belgium); Cherubini, S. [INFN Laboratori Nazionali del Sud, I-95123 Catania (Italy); Demaret, P. [Centre de Recherches du Cyclotron, Universite Catholique de Louvain, B-1348 Louvain-la-Neuve (Belgium); Espino, J.M. [Dept. de Fisica Atomica, Molecular y Nuclear, Universidad de Sevilla, E-41080 Sevilla (Spain); Figuera, P. [INFN Laboratori Nazionali del Sud, I-95123 Catania (Italy); Freer, M. [School of Physics and Astronomy, University of Birmingham, B15 2TT Birmingham (United Kingdom); Garcia-Ramos, J.E. [Departamento de Fisica Aplicada, Universidad de Huelva, E-21071 Huelva (Spain); Gomez-Camacho, J. [Dept. de Fisica Atomica, Molecular y Nuclear, Universidad de Sevilla, E-41080 Sevilla (Spain); Gulino, M. [INFN Laboratori Nazionali del Sud, I-95123 Catania (Italy); Kakuee, O.R. [Van der Graaff Laboratory, Nuclear Research Centre, AEOI, PO Box 14155-1339, Tehran (Iran, Islamic Republic of); Martel, I. [Dept. de Fisica Aplicada, Universidad de Huelva, E-21071 Huelva (Spain)], E-mail: imartel@uhu.es; Metelko, C. [School of Physics and Astronomy, University of Birmingham, B15 2TT Birmingham (United Kingdom); Moro, A.M. [Dept. de Fisica Atomica, Molecular y Nuclear, Universidad de Sevilla, E-41080 Sevilla (Spain)] (and others)

    2008-04-15

    The elastic scattering of {sup 6}He on {sup 208}Pb has been measured at laboratory energies of 14, 16, 18 and 22 MeV. These data were analyzed using phenomenological Woods-Saxon form factors and optical model calculations. A semiclassical polarization potential was used to study the effect of the Coulomb dipole polarizability. Evidence for long range absorption, partially arising from Coulomb dipole polarizability, is reported. The energy variation of the optical potential was found to be consistent with the dispersion relations which connect the real and imaginary parts of the potential.

  16. Multipole decomposition analysis of the 27Al, 90Zr, 208Pb(p, n) reactions at 295 MeV

    International Nuclear Information System (INIS)

    Wakasa, T.; Greenfield, M.B.; Koori, N.; Okihana, A.; Hatanaka, K.

    1996-01-01

    Differential cross sections at θ lab between 0 and 15 and the polarization transfer D NN at zero degrees for the 27 Al, 90 Zr, 208 Pb(p,n) reactions are measured at a bombarding energy of 295 MeV. A multipole decomposition (MD) technique is applied to extract L=0, L=1, and L≥2 contributions to the cross sections. The summed Gamow-Teller strength B(GT) is compared with shell-model calculations for the 27 Al(p,n) and 90 Zr(p,n) reactions. The usefulness of the polarization transfer observable in the MD analysis is discussed. (orig.)

  17. Production of heavy evaporation residues in the reactions induced by an extracted 48Ca beam on a 208Pb target

    International Nuclear Information System (INIS)

    Eremin, A.V.; Chepigin, V.I.; Itkis, M.G.

    1998-01-01

    The production cross sections of the isotopes 253-255 No were measured for the heavy ion complete fusion reaction 48 Ca + 208 Pb using the electrostatic recoil separator VASSILISSA. The obtained excitation functions for the reaction products formed after the evaporation of 1-3 neutrons from the compound nucleus are discussed and compared with the data obtained earlier and with the results of the statistical model calculations. The background conditions at the extraction of the correlated events of the reaction product decay are also considered from the point of view of future experiments on the superheavy element synthesis in the complete fusion reactions induced by 48 Ca projectiles

  18. Excitation of giant monopole resonance in {sup 208}Pb and {sup 116}Sn using inelastic deuteron scattering

    Energy Technology Data Exchange (ETDEWEB)

    Patel, D.; Garg, U. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556 (United States); Itoh, M. [Cyclotron and Radioisotope Center, Tohoku University, Sendai 980-8578 (Japan); Akimune, H. [Department of Physics, Konan University, Kobe 568-8501 (Japan); Berg, G.P.A. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556 (United States); Fujiwara, M. [Research Center for Nuclear Physics, Osaka University, Osaka 567-0047 (Japan); Harakeh, M.N. [Kernfysisch Versneller Instituut, University of Groningen, 9747 AA Groningen (Netherlands); GANIL, CEA/DSM-CNRS/IN2P3, 14076 Caen (France); Iwamoto, C. [Department of Physics, Konan University, Kobe 568-8501 (Japan); Kawabata, T. [Division of Physics and Astronomy, Kyoto University, Kyoto 606-8502 (Japan); Kawase, K. [Japan Atomic Energy Agency, Kyoto 619-0215 (Japan); Matta, J.T. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556 (United States); Murakami, T. [Division of Physics and Astronomy, Kyoto University, Kyoto 606-8502 (Japan); Okamoto, A. [Department of Physics, Konan University, Kobe 568-8501 (Japan); Sako, T. [Japan Atomic Energy Agency, Kyoto 619-0215 (Japan); Schlax, K.W. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Takahashi, F. [Research Center for Nuclear Physics, Osaka University, Osaka 567-0047 (Japan); White, M. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Yosoi, M. [Research Center for Nuclear Physics, Osaka University, Osaka 567-0047 (Japan)

    2014-07-30

    The excitation of the isoscalar giant monopole resonance (ISGMR) in {sup 208}Pb and {sup 116}Sn has been investigated using small-angle (including 0°) inelastic scattering of 100 MeV/u deuteron and multipole-decomposition analysis (MDA). The extracted strength distributions agree well with those from inelastic scattering of 100 MeV/u α particles. These measurements establish deuteron inelastic scattering at E{sub d}∼100 MeV/u as a suitable probe for extraction of the ISGMR strength with MDA, making feasible the investigation of this resonance in radioactive isotopes in inverse kinematics.

  19. Cross-sections of spallation residues produced in 1A GeV 208Pb on proton reactions

    International Nuclear Information System (INIS)

    Wlazlo, W.; Uniwersytet Jagiellonski, Cracow; Enqvist, T.; Armbruster, P.

    2000-02-01

    Spallation residues produced in 1 GeV per nucleon 208 Pb on proton reactions have been studied using the fragment separator facility at GSI. Isotopic production cross-sections of elements from 61 Pm to 82 Pb have been measured down to 0.1 mb with a high accuracy. The recoil kinetic energies of the produced fragments were also determined. The obtained cross-sections agree with most of the few existing gamma-spectroscopy data. Data are compared with different intranuclear-cascade and evaporation-fission models. Drastic deviations were found for a standard code used in technical applications. (orig.)

  20. Toward lifetime and g factor measurements of short-lived states in the vicinity of 208Pb

    International Nuclear Information System (INIS)

    Ralet, D; Georgiev, G; Stuchbery, A E; Clément, E; Lemasson, A; Michelagnoli, C; Rejmund, M; France, G de; Atanasova, L; Balabanski, D L; Bocchi, G; Carroll, R; Dewald, A; Fransen, C; Müller-Gatermann, C; Dudouet, J; Fornal, B; Franchoo, S; Goasduff, A; Gadea, A

    2017-01-01

    The multi-nucleon transfer reaction mechanism was used to produce and study nuclei in the vicinity of 208 Pb. This mass region is a test case for the nuclear shell model. The mass identification of the fragments was performed with the large acceptance magnetic spectrometer VAMOS++ coupled to the AGATA γ -tracking array. This experiment aimed to determine both lifetimes and gyromagnetic ratios of excited states with the Cologne plunger device. The analysis indicates promising results with the possibility to determine several new lifetimes in this region. (paper)

  1. Precise determination of the neutron scattering length of lead isotopes 204Pb,207Pb and 208Pb by neutron interferometry

    International Nuclear Information System (INIS)

    Ioffe, A.; Ermakov, O.; Karpikhin, I.; Krupchitsky, P.; Mikula, P.; Lukas, P.; Vrana, M.

    2000-01-01

    The neutron scattering length of lead isotopes 204 Pb, 207 Pb and 208 Pb are determined by a set of neutron interferometry experiments. The obtained values b (208) =9.494(30) fm, b (207) =9.286(16) fm, b (204) =10.893(78) fm have much higher accuracy then current table data. Together with the precise value of b for natural lead, these results represent a complete set of data and allow one to calculate b (206) =9.221(69) fm, which is in the very good agreement with the present day experimental value. (orig.)

  2. Study of the γ decay of high-lying states in 208Pb via inelastic scattering of 17O ions

    Directory of Open Access Journals (Sweden)

    Crespi F.C.L.

    2014-03-01

    Full Text Available A measurement of the high-lying states in 208Pb has been made using 17O beams at 20 MeV/u. The gamma decay following inelastic excitation was measured with the detector system AGATA Demonstrator based on segmented HPGe detectors, coupled to an array of large volume LaBr3:Ce scintillators and to an array of Si detectors. Preliminary results in comparison with (γ,γ’ data, for states in the 5-8 MeV energy interval, are presented.

  3. Study of multi nucleon transfer in "9","1"1Li + "2"0"8Pb reactions

    International Nuclear Information System (INIS)

    Vinodkumar, A.M.

    2014-01-01

    One of the most active areas of research with radioactive beams is the study of the fusion of weakly bound nuclei, such as the halo nuclei. The central issue is whether the fusion cross section will be enhanced due to the large nuclear size of the halo nucleus or whether fusion-limiting breakup of the weakly bound valence nucleons will lead to a decreased fusion cross section. The fusion of "9","1"1Li with "2"0"8Pb were reported. These measurements were carried out at TRIUMF, Canada. These measurements suggests at above barrier energies, fusion hindrance is taking place in the case of "1"1Li projectile. However, sub barrier fusion measurement need a lower energy measurement. These measurements also suggest need for further measurement of transfer and breakup channels in these reactions. So we suggest a measurement of multi nucleon transfer in the case of "9Li + "2"0"8Pb. Also, these measurement will be able to produce the same nuclei as suggested in the ISOLDE experiment by, where "2"1"2","2"1"4Pb and "2"0"8","2"1"0Hg nuclei for studying the spectroscopy of these nuclei. (author)

  4. 207,208Pb(n,xnγ) reactions for neutron energies from 3 to 200 MeV

    International Nuclear Information System (INIS)

    Vonach, H.; Pavlik, A.; Chadwick, M.B.; Haight, R.C.; Nelson, R.O.; Wender, S.A.; Young, P.G.

    1994-01-01

    High-resolution γ-ray spectra from the interaction of neutrons in the energy range from 3 to 200 MeV with 207,208 Pb were measured with the white neutron source at the weapons neutron research (WNR) facility at Los Alamos National Laboratory. From these data, excitation functions for prominent γ transitions in 200,202,204,206,207,208 Pb were derived from threshold to 200 MeV incident neutron energy. These γ-production cross sections reflect the excitation cross sections for the respective residual nuclei. The results are compared with the predictions of nuclear reaction calculations based on the exciton model for precompound emission, the Hauser-Feshbach theory for compound nucleus decay, and coupled channels calculations to account for direct excitation of collective levels. Good agreement was obtained over the entire energy range covered in the experiment with reasonable model parameters. The results of this work clearly demonstrate that multiple preequilibrium emission has to be taken into account above about 40 MeV, and that the level density model of Ignatyuk, which accounts for the gradual disappearance of shell effects with increasing excitation energy, should be used instead of the Gilbert-Cameron and backshifted Fermi-gas models if excitation energies exceed about 30 MeV. No indication for a reduction of the nuclear moment of inertia below the rigid body value was found

  5. Study of shell evolution around the doubly magic $^{208}$Pb via a multinucleon transfer reaction with an unstable beam

    CERN Multimedia

    This proposal aims at the study of the neutron-rich region around the doubly-magic nucleus $^{208}$Pb populated via a multinucleon transfer reaction. An unstable $^{94}$Rb beam will be delivered by HIE-ISOLDE at 5.5 MeV$\\cdot$u onto a $^{208}$Pb 13.0 mg/cm$^{2}$ target. The $\\gamma$- rays will be recorded by the MINIBALL $\\gamma$-ray spectrometer. The aim of the experiment is twofold: \\\\ \\\\ i) firstly it will represent the proof of principle that multinucleon transfer reactions with neutron-rich unstable beams is efficient to populate neutron-rich heavy binary partners and represents a competitive method to cold fragmentation \\\\ ii) secondly we aim at populating medium- to high-spin states in $^{212;214}$Pb and $^{208;210}$Hg to elucidate the existence of the 16$^{+}$ isomer in the lead isotopes and at the same time to disentangle the puzzling case of a very low energy 3$^{-}$ state in $^{210}$Hg not described by any nuclear model. \\\\ \\\\ The experimental results will be compared with large-scale shell-model ...

  6. Electric dipole response of {sup 208}Pb from proton inelastic scattering: Constraints on neutron skin thickness and symmetry energy

    Energy Technology Data Exchange (ETDEWEB)

    Tamii, A. [Research Center for Nuclear Physics, Ibaraki (Japan); Neumann-Cosel, P. von; Poltoratska, I. [Technische Universitaet Darmstadt, Institut fuer Kernphysik, Darmstadt (Germany)

    2014-02-15

    The electric dipole (E1) response of {sup 208}Pb has been precisely determined by measuring Coulomb excitation induced by proton scattering at very forward angles. The electric dipole polarizability, defined as inverse energy-weighted sum rule of the E1 strength, has been extracted as α{sub D} = 20.1 ± 0.6 fm{sup 3}. The data can be used to constrain the neutron skin thickness of {sup 208}Pb to Δr{sub np} = 0.165 ± (0.009){sub expt} ± (0.013){sub theor} ± (0.021){sub est} fm, where the subscript ''expt'' refers to the experimental uncertainty, ''theor'' to the theoretical confidence band and ''est'' to the uncertainty associated with the estimation of the symmetry energy at the saturation density. In addition, a constraint band has been extracted in the plane of the symmetry energy (J and its slope parameter L) at the saturation density. (orig.)

  7. Excitation of giant resonances in 20Ne + 90Zr and 208Pb inelastic scattering at 40 MeV/u1

    International Nuclear Information System (INIS)

    Suomijaervi, T.; Beaumel, D.; Blumenfeld, Y.; Chomaz, P.; Frascaria, N.; Garron, J.P.; Jacmart, J.C.; Roynette, J.C.; Kraus, L.; Link, I.

    1988-01-01

    The giant resonance region in the inelastic spectra from the reactions 20 Ne + 90 Zr and 20 Ne + 208 Pb at 40 MeV/nucleon has been studied with a good energy and angular resolutions. The strength distributions of the different multipolarities contributing to the cross section were obtained by a resonance shape independent analysis. In the case of 208 Pb the GDR strength was found to be strongly shifted towards lower excitation energies which can be explained by the exponentially decreasing Coulomb excitation probability. Furthermore, indications for a high multipolarity component in the resonance structure were found in both reactions

  8. Extending and refining the mass surface around $^{208}$Pb by high-precision Penning-trap mass spectrometry with ISOLTRAP

    CERN Multimedia

    Herfurth, F; Stora, T; Blaum, K; Beck, D; Kowalska, M; Schwarz, S; Stanja, J; Herlert, A J; Yamaguchi, T

    We propose high-precision mass spectrometry of nuclides around the doubly magic $^{208}$Pb. On the neutron-rich side, we aim to extend the knowledge of Fr, At, Hg, and Au masses to study the robustness of the N = 126 shell closure and to provide mass data necessary for modeling the rapid-neutron-capture process. On the proton-rich side, we aim at high-resolution mass spectrometry of selected Au, At, and Fr isotopes to verify the predicted existence of very low-lying isomeric states. The proposal will make use of newly-available laser-ionization schemes for Au and At. Finally, the recently implemented multi-reflection time-of-flight mass separator for auxiliary isobaric purification now allows measurements which were not feasible before.

  9. Analysis of the intermediate stage in the heavy ion interactions of 208Pb+197Au and 197Au+197Au

    International Nuclear Information System (INIS)

    Nasir, Tabassum; Khan, E.U.; Baluch, J.J.; Qureshi, I.E.; Sajid, M.; Shahzad, M.I.

    2008-01-01

    Two different projectiles 208 Pb and 197 Au at the same energy (11.67MeV/u) have been bombarded on 197 Au target to study heavy ion interactions using mica as a passive detector. In this paper we present results on the study of energy damping and time scale of the existence of di-nuclear composite system in the intermediate reaction step. The plots of Q-values as well as reaction cross sections in various angular bins of scattering angles suggest that K.E. damping was complete and dynamic equilibrium was established between the first and second reaction steps. The time scale of this duration was also determined

  10. Complete electric dipole response in 120Sn and 208Pb and implications for neutron skin and symmetry energy

    International Nuclear Information System (INIS)

    Von Neumann-Cosel, Peter

    2015-01-01

    Polarized proton scattering at energies of a few 100 MeV and very forward angles including 0° has been established as a new tool to extract the complete E1 strength distribution in nuclei for excitation energies between about 5 and 20 MeV. A case study of 208 Pb demonstrates excellent agreement with other electromagnetic probes. From the information on the B(E1) strength one can derive the electric dipole dipole polarizability, which is strongly correlated to the neutron skin and to parameters of the symmetry energy. Recently, we have extracted the polarizability of 120 Sn with a comparable precision. The combination of both results further constrains the symmetry energy parameters and presents a challenge for mean-field models, since relativistic and many Skyrme parameterizations cannot reproduce both experimental results simultaneously. (paper)

  11. Inelastic scattering of high transfer moment electrons to the first excited state (Jsup(π)=3-) of 208Pb

    International Nuclear Information System (INIS)

    Goutte, Dominique.

    1979-10-01

    A determination was made of an angular distribution of the inelastic scattering cross-sections of electrons by the first excited state (Jsup(π)=3 - , E*=2.615 MeV) of 208 Pb. The statistical accuracy of previous data was improved between 2 and 2.7 fm -1 and the area of transfer of moment was extended up to qsub(max)=3.4 fm -1 . Cross-sections up to 10 -37 cm 2 /sr were determined whereas the limit reached before was 7x10 -35 cm 2 /sr. In order to determine the transition charge density, it was put into parametric form by a Fourier-Bessel development using 12 coefficients and an 11 fm cut-off radius. The model error inherent in this method is reduced to an insignificant contribution by the sufficiently high transfer of moment. The experimental transition charge density was compared with the theoretical predictions [fr

  12. Complete Electric Dipole Response in 120Sn and 208Pb and Implications for Neutron Skin and Symmetry Energy

    Directory of Open Access Journals (Sweden)

    von Neumann-Cosel Peter

    2015-01-01

    Full Text Available Polarized proton scattering at energies of a few 100 MeV and extreme forward angles including 0° has been established as a new tool to extract the complete E1 response in nuclei up to excitation energies of about 20 MeV. A case study of 208Pb demonstrates excellent agreement with other electromagnetic probes. From the information on the B(E1 strength one can derive the electric dipole dipole polarizability, which is strongly correlated to the neutron skin and to parameters of the symmetry energy. Recently, we have extracted the polarizability of 120Sn with a comparable precision. The combination of both results further constrains the symmetry energy parameters and presents a challenge for mean-field models, since the relativistic and many Skyrme parameterizations cannot reproduce both experimental results simultaneously.

  13. Role of shell corrections in doubly magic "2"0"8Pb radioactivity within quantum mechanical fragmentation theory

    International Nuclear Information System (INIS)

    Mandeep Kaur; Singh, BirBikram; Sukhmanpreet Kaur

    2017-01-01

    The liquid drop energy (V_L_D_M) along with shell corrections (δU) plays an important role to give the proper understanding of binding energies of atomic nuclei. It is relevant mention here that to study the excited state decay of nuclear systems Gupta and collaborators developed dynamical cluster decay model (DCM) by refitting the binding energies at T=0, to get temperature dependent binding energies with shell corrections included, for the same. Also, in literature different types of temperature dependent binding energies formulas are available. In DCM, the temperature dependent binding energies have been included as given by Davidson et al. In the process, shell corrections, δU were also calculated along with VLDM to reproduce the available experimental binding energies at T=0. It is relevant to mention here that the nuclear shell structure plays main role in the process of cluster radioactivity (CR) as very well explored by the quantum mechanical fragmentation theory (QMFT)-based preformed cluster decay model (PCM), which is the special case of DCM at T=0. Within PCM, Gupta and collaborators also studied the role of deformations or orientations in the decay of number of radioactive nuclei in trans-lead region, specifically, which lead to doubly magic "2"0"8Pb daughter nucleus through emission of clusters i.e. "1"4C, "1"8","2"0O, "2"2Ne, "2"3F, "2"4","2"6 Ne, "2"8","3"0Mg and "3"2","3"4Si, along with many other CR decays. As mentioned earlier, the nuclear shell structure plays an important role in the decay of radioactive nuclei to doubly magic "2"0"8Pb through cluster

  14. Reaction cross sections for protons on {sup 12}C, {sup 40}Ca, {sup 90}Zr and {sup 208}Pb at energies between 80 and 180 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Auce, A.; Ingemarsson, A.; Johansson, R. [and others

    2005-04-01

    Results of reaction cross section measurements on {sup 12}C, {sup 40}Ca, {sup 90}Zr and {sup 208}Pb at incident proton energies between 80 and 180 MeV and for {sup 58}Ni at 81 MeV are presented. The experimental procedure is described and the results are compared with earlier measurements and predictions using macroscopic and microscopic models.

  15. Reaction cross sections for protons on 12C, 40Ca, 90Zr and 208Pb at energies between 80 and 180 MeV

    International Nuclear Information System (INIS)

    Auce, A.; Ingemarsson, A.; Johansson, R.

    2005-04-01

    Results of reaction cross section measurements on 12 C, 40 Ca, 90 Zr and 208 Pb at incident proton energies between 80 and 180 MeV and for 58 Ni at 81 MeV are presented. The experimental procedure is described and the results are compared with earlier measurements and predictions using macroscopic and microscopic models

  16. Measurement of isotopic cross sections of the fission fragments produced in 500 AMeV 208Pb + p reaction

    International Nuclear Information System (INIS)

    Fernandez-Dominguez, B.

    2003-03-01

    The aim of this work is the study of the fission fragments produced in the spallation reaction 208 Pb + p at 500 AMeV. The fission fragments from Z=23 up to Z=59 have been detected and identified by using the inverse kinematics technique with the high-resolution spectrometer FRS. The production cross sections and the recoil velocities of 430 nuclei have been measured. The measured data have been compared with previous data. The isotopic distributions show a high precision. However, the absolute value of the fission cross section is higher than expected. From the experimental data the characteristics of the average fissioning system have been reconstructed (Z fis , A fis , E* fis ). In addition, the number of post-fission neutrons emitted from the fission fragments, v post , has been determined by using a new method. The experimental data have been compared to the two-steps models describing the spallation reaction. The impact of the model parameters on the observables has been analysed and the reasons Leading to the observed differences between the codes are also presented. This analyse shows a good agreement with the INCL4+ABLA code. (author)

  17. Interaction of 84 MeV/u 12C with 208Pb target investigated with CR-39 plastic track detector

    International Nuclear Information System (INIS)

    Grabez, B.

    1984-01-01

    The interaction of the 84 MeV/u 12 C ions with 208 Pb target was investigated using CR-39 plastic track detector. The first part of the work was dedicated to the examination of the methodology of the recently presented CR-39 detector and its calibration. Measurements have been done on tracks of various ions in the broad atomic number region from Z = 2 to Z = 92. The possibility of the identification of low energy fragments produced in nuclear interactions by measurements on the finished tracks was studied. Our results show that very good charge resolution can be achieved through determination of the mean etch rate ratio and the range of low energy ions. In the second part of the work it was shown that the main reaction channels in the interaction of 84 MeV/u C with Pb target are spallation, fission and fragmentation. The contribution of the multifragmentation is less than 1% of the total reaction cross section. From our results follows that the most probable reaction channels after collision with small impact parameter are fragmentation and deep spallation. The spallation and fission come after more peripheral collisions. (orig./HSI)

  18. Neutron densities and the single particle structure of several even-even nuclei from 40Ca to 208Pb

    International Nuclear Information System (INIS)

    Ray, L.; Hodgson, P.E.

    1979-01-01

    Previously developed techniques which sum the squares of proton single particle wave functions to obtain nuclear charge densities are applied to the study of neutron distributions in /sup 40,48/Ca, /sup 58,64/Ni, /sup 116,124/Sn, and 208 Pb by comparing to those neutron densities deduced from 800 MeV proton elastic scattering data. The proton and neutron single particle wave functions are derived from a one-body, nonlocal Woods-Saxon binding potential whose parameters are adjusted to give the experimental single particle energies. Empirical spectroscopic factors determine the appropriate occupation probabilities for the single particle levels near the Fermi surface. Proper attention is given to nonorthogonality problems and to the removal of the spurious center-of-mass motion. These semiphenomenological neutron densities are compared to the predictions of the density matrix expansion variant of Hartree-Fock theory and to densities which are empirically deduced from recent 800 MeV polarized proton elastic scattering data. These ''experimental'' neutron distributions are obtained from approximate second order Kerman, McManus, and Thaler optical potential analyses using essentially ''model independent'' neutron densities. Qualitatively good agreement is obtained between the semiphenomenological neutron densities computed here, the density matrix expansion predictions, and the empirical results

  19. Study of fission reactions induced by 4,6He and 7Li beams on 209Bi and 208Pb targets

    Directory of Open Access Journals (Sweden)

    Lukyanov S.M.

    2013-12-01

    Full Text Available Study of fission reactions induced by 4,6He and 7Li beams on 209Bi and 208Pb targets, leading to the production of 210,212A compound nuclei, was performed. It was shown that the fission excitation functions for the three reactions 4,6He + 209Bi and 7Li + 208Pb had similar behavior within the experimental error for a broad range of energy. More likely, halo structure of 6He is not reflected on the fission reaction mechanism. Otherwise, a large value of the fusion cross section was observed so far, as it could be expected in the case of weakly bound character of 6He projectile.

  20. Analysis of light particles correlation selected by neutron calorimetry in the reaction 208 Pb+93 Nb at 29 MeV/u

    International Nuclear Information System (INIS)

    Ghisalberti, C.

    1994-01-01

    This work deals with the analysis of light particles correlation selected by neutrons calorimetry in the reaction : 208 Pb+ 93 Nb at 29 MeV/u. In the first part are described the interest of correlation functions, the proton-proton correlation function study, the classical model developed for describing the correlations of two light particles emitted by a nucleus in thermal equilibrium, the quantum model and some notions about exclusive sources and measures. The second part is a description of the experience : 208 Pb+ 93 Nb at 29 MeV/u. The analysis of experimental data and of experimental correlation functions are given respectively in the third and the fourth parts. (O.L.). 38 refs., 82 figs., 11 tabs

  1. Consistent dispersive optical-model analyses for n+209Bi and n+208Pb from -20 to +80 MeV

    International Nuclear Information System (INIS)

    Weisel, G.J.; Tornow, W.; Howell, C.R.

    1993-01-01

    Complementary databases were constructed from published and some new measurements of σ(θ), Ay(θ) and σ T for n+ 208 Pb and n+ 209 Bi covering the energy range 1.0 to 80 MeV. A dispersive optical-model analysis was performed for both scattering systems while constraining many of the parameters to be identical. A good representation of the data is obtained with conventional geometry and spin-orbit parameters. The 208 Pb model predicts quite well measured energies of single-particle and single-hole bound states. Occupation probabilities are calculated. A fully constrained model is presented in which the only differences between the two systems are the Fermi energy and the usual isospin term. This latter model represents all the data well

  2. Study of the reaction 22Ne(131 MeV) + 208Pb with a PIAVE-ALPI test beam and the PRISMA-CLARA set-up

    International Nuclear Information System (INIS)

    Mason, P.; Marginean, N.; Stefanini, A.M.

    2005-01-01

    An opportunity to study the system 22 Ne+ 208 Pb in the proximity of the Coulomb barrier with the PRISMACLARA apparatus was given by a test of the PIAVE-ALPI accelerator in mid-December 2005. The 22 Ne projectiles, having the kinetic energy of 131 MeV, collided with a 208 Pb target 300 μg/cm 2 thick. (The beam was run for ∼20 hours with a current of ∼6 particle-nA). The reaction products, mainly originated by scattering or transfer processes, were detected by the PRISMA spectrometer (positioned in the proximity of the grazing angle, ∼70 degrees), coupled to the CLARA array of germanium detectors

  3. Investigation of transversal nuclear excitation in 208Pb at excitation energies between 6 MeV and 8 MeV using inelastic electron scattering

    International Nuclear Information System (INIS)

    Frey, R.W.

    1978-01-01

    Using high resolution inelastic electron scattering magnitic dipole and quadrupole excitations in 208 Pb were investigated in the energy range between 6 MeV and 8 MeV. The electron energy was 50 MeV and 63.5 MeV. With a mean absolute energy resolution of 33 kev. 44 excited states were found in the above energy range. The measured angular distributions were compared with DWBA-calculations using random phase approximated wave functions. (FKS)

  4. MOTIVACIJA PRI LIKOVNI VZGOJI

    OpenAIRE

    Kerin, Tjaša

    2011-01-01

    V teoretičnem delu diplomskega dela predstavljamo splošen pojem motivacije, pomen motivacije ter teoretična izhodišča. Povezujemo splošna teoretična izhodišča s poučevanjem likovne vzgoje ter artikulacijske značilnosti pri njenem pouku. Ob tem smo tudi izpostavili pomembnost motivacije pri likovni vzgoji ter navedli nekaj možnosti za uspešno realizacijo le-te. Dotaknili smo se tudi individualizacije pri likovni vzgoji ter sredstev za spodbujanje motivacije. V empiričnem delu dela predsta...

  5. Analysis of the neutron energy spectra from the sup(208)Pb (p,n) sup(208)Bi reaction at Esub(p)=200 MeV

    International Nuclear Information System (INIS)

    Ershov, S.N.; Fayans, S.A.; Gareev, F.A.; Pyatov, N.I.

    1986-01-01

    Microscopic calculation of the small-angle neutron energy spectra from the 208 Pb (p, n) 208 Bi reaction at Esub(p)=200 MeV are presented. It is shown that the distorted-wave impulse approximation and the microscopic theory of finite Fermi systems can be employed for describing the low-energy excitation region 0 <= Q <= 30 MeV with small momentum transfers. A quantitative estimate is obtained for the local charge of quasiparticles esub(q)[σtau]=0.8 that characterizes the quenching of the integral strength of spin-flip low-energy transitions and the relevant effects are discussed

  6. Long range absorption in the scattering of {sup 6}He on {sup 208}Pb and {sup 197}Au at 27 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Kakuee, O.R. [Van De Graaf Laboratory, Nuclear Research Centre, AEOI, P.O. Box 14155-1339, Tehran (Iran, Islamic Republic of)]|[Departamento de Fisica Atomica, Molecular y Nuclear, Apartado 1065, Universidad de Sevilla, E-41080 Sevilla (Spain); Alvarez, M.A.G. [Departamento de Fisica Atomica, Molecular y Nuclear, Apartado 1065, Universidad de Sevilla, E-41080 Sevilla (Spain); Andres, M.V. [Departamento de Fisica Atomica, Molecular y Nuclear, Apartado 1065, Universidad de Sevilla, E-41080 Sevilla (Spain); Cherubini, S. [Department de Physique Nucleaire, Universite Catholique, Louvain-la-Neuve (Belgium)]|[Institut fuer Experimentalphysik III, Ruhr-Universitaet Bochum (Germany); Davinson, T.; Di Pietro, A.; Laird, A.M.; Shotter, A.C.; Smith, W.B.; Woods, P.J. [Department of Physics and Astronomy, Edinburgh University, EH9 3JZ (United Kingdom); Galster, W. [Department de Physique Nucleaire, Universite Catholique, Louvain-la-Neuve (Belgium); Gomez-Camacho, J. [Departamento de Fisica Atomica, Molecular y Nuclear, Apartado 1065, Universidad de Sevilla, E-41080 Sevilla (Spain)]. E-mail: gomez@us.es; Lamehi-Rachti, M. [Van De Graaf Laboratory, Nuclear Research Centre, AEOI, P.O. Box 14155-1339, Tehran (Iran, Islamic Republic of); Martel, I. [Departamento de Fisica Aplicada, Universidad de Huelva, E-21819 Huelva (Spain); Moro, A.M. [Departamento de Fisica Atomica, Molecular y Nuclear, Apartado 1065, Universidad de Sevilla, E-41080 Sevilla (Spain); Rahighi, J. [Van De Graaf Laboratory, Nuclear Research Centre, AEOI, P.O. Box 14155-1339, Tehran (Iran, Islamic Republic of)]|[Department of Physics and Astronomy, Edinburgh University, EH9 3JZ (United Kingdom); Sanchez-Benitez, A.M. [Departamento de Fisica Aplicada, Universidad de Huelva, E-21819 Huelva (Spain); Vervier, J. [Department de Physique Nucleaire, Universite Catholique, Louvain-la-Neuve (Belgium)

    2006-02-06

    Quasi-elastic scattering of {sup 6}He at E{sub lab}=27 MeV from {sup 197}Au has been measured in the angular range of 6{sup o}-72{sup o} in the laboratory system employing LEDA and LAMP detection systems. These data, along previously analysed data of {sup 6}He+{sup 208}Pb at the same energy, are analysed using optical model calculations. The role of Coulomb dipole polarizability has been investigated. Large imaginary diffuseness parameters are required to fit the data. This result is an evidence for long range absorption mechanisms in {sup 6}He induced reactions.

  7. High-resolution inelastic electron scattering on 208Pb at 50 and 63.5 MeV and fragmentation of the magnetic quadrupole strength

    International Nuclear Information System (INIS)

    Knuepfer, W.; Frey, R.; Richter, A.; Schwierczinski, A.; Spamer, E.; Titze, O.

    1977-12-01

    High-resolution inelastic electron scattering (FWHM approximately equal to 33 keV) with 50 MeV and 63.5 MeV electrons on 208 Pb has been used to study magnetic excitations between Esub(x) = 6 MeV and 8 MeV. Angular distributions were analyzed in terms of the DWBA with RPA wave functions. Eight Isup(π) = 2- states carrying a total strength ΣB(M2) = 8500 μ 2 sub(K) fm 2 have been found. The strong fragmentation is in qualitative agreement with theoretical predictions. (orig.) [de

  8. Testing the mutually enhanced magicity effect in nuclear incompressibility via the giant monopole resonance in the {sup 204,206,208}Pb isotopes

    Energy Technology Data Exchange (ETDEWEB)

    Patel, D. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556 (United States); Garg, U., E-mail: garg@nd.edu [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556 (United States); Fujiwara, M. [Research Center for Nuclear Physics, Osaka University, Osaka 567-0047 (Japan); Adachi, T. [Kernfysisch Versneller Instituut, University of Groningen, 9747 AA Groningen (Netherlands); Akimune, H. [Department of Physics, Konan University, Kobe 568-8501 (Japan); Berg, G.P.A. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556 (United States); Harakeh, M.N. [Kernfysisch Versneller Instituut, University of Groningen, 9747 AA Groningen (Netherlands); GANIL, CEA/DSM-CNRS/IN2P3, 14076 Cean (France); Itoh, M. [Cyclotron and Radioisotope Center, Tohoku University, Sendai 980-8578 (Japan); Iwamoto, C. [Department of Physics, Konan University, Kobe 568-8501 (Japan); Long, A.; Matta, J.T. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556 (United States); Murakami, T. [Division of Physics and Astronomy, Kyoto University, Kyoto 606-8502 (Japan); Okamoto, A. [Department of Physics, Konan University, Kobe 568-8501 (Japan); Sault, K. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Talwar, R. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556 (United States); Uchida, M. [Department of Physics, Tokyo Institute of Technology, Tokyo 152-8850 (Japan); and others

    2013-10-07

    Using inelastic α-scattering at extremely forward angles, including 0°, the strength distributions of the isoscalar giant monopole resonance (ISGMR) have been measured in the {sup 204,206,208}Pb isotopes in order to examine the proposed mutually enhanced magicity (MEM) effect on the nuclear incompressibility. The MEM effect had been suggested as a likely explanation of the “softness” of nuclear incompressibility observed in the ISGMR measurements in the Sn and Cd isotopes. Our experimental results rule out any manifestation of the MEM effect in nuclear incompressibility and leave the question of the softness of the open-shell nuclei unresolved still.

  9. Spectroscopic study of 206,207,208Pb isotopes by high resolution analysis of 24.5 MeV proton scattering

    International Nuclear Information System (INIS)

    Vallois, G.

    1968-03-01

    206,207,208 pb have been studied by 24.5 MeV proton inelastic scattering with a resolution of 20 keV. The angular distributions of the differential cross-sections corresponding to the different excited levels have been measured in a large angular region and analysed with the DWBA.This work shows that it exists between 4 and 5 MeV of excitation energy some strongly excited levels corresponding to transfer momenta l = 2, 4, 6 and 8. The single particle-hole models do not explain these states; so it will probably be necessary to introduce some several particle - hole configurations. (author) [fr

  10. Analysis of light particles correlation selected by neutron calorimetry in the reaction {sup 208} Pb+{sup 93} Nb at 29 MeV/u; Analyse de correlation de particules legeres selectionnees par calorimetrie neutronique dans la reaction {sup 208} Pb+{sup 93} Nb a 29 MeV/u

    Energy Technology Data Exchange (ETDEWEB)

    Ghisalberti, C

    1994-11-10

    This work deals with the analysis of light particles correlation selected by neutrons calorimetry in the reaction : {sup 208} Pb+{sup 93} Nb at 29 MeV/u. In the first part are described the interest of correlation functions, the proton-proton correlation function study, the classical model developed for describing the correlations of two light particles emitted by a nucleus in thermal equilibrium, the quantum model and some notions about exclusive sources and measures. The second part is a description of the experience : {sup 208} Pb+{sup 93} Nb at 29 MeV/u. The analysis of experimental data and of experimental correlation functions are given respectively in the third and the fourth parts. (O.L.). 38 refs., 82 figs., 11 tabs.

  11. Developments of 207Pb, 208Pb and 209Bi target wheels in the synthesis of 107Ns, 108Hs and 109Mt

    International Nuclear Information System (INIS)

    Folger, H.; Hartmann, W.; Hessberger, F.P.; Hofmann, S.; Klemm, J.; Muenzenberg, G.; Ninov, V.; Schmidt, K.H.; Schoett, H.J.; Thalheimer, W.; Armbruster, P.

    1993-05-01

    The developments of 207 Pb, 208 Pb and 209 Bi target wheels and their applications in heavy-ion fusion reactions are reviewed. In both, fabrication and use, the centers of the evaporator or accelerator beams are focussed at wheel radii of 155 mm to specially shaped frames which generate very homogeneous target layers and very constant reaction and counting rates in the experiment. Target areas of up to ∼98% of a wheel's circumference of 974 mm can be provided. The preparation procedures for necessary C backings and protecting layers of C are described, and details are given for the developments of high-vacuum evaporations of 207 Pb, 208 Pb and 209 Bi with deposition yields of 35-55% from tantalum crucibles. The applications of the target wheels in heavy-ion fusion reactions with beams of 54 Cr and 58 Fe at energies near the Coulomb barrier and intensities of ∼10 12 particles/s are mentioned. The target parameters for the production runs of the new chemical elements 107 Ns, 108 Hs and 109 Mt are included. (orig.)

  12. Competition from the ν/sub e/ 208Pb → 208Bi e- reaction in a search for ν/sub μ/-bar → ν/sub e/-bar oscillation

    International Nuclear Information System (INIS)

    Toevs, J.W.; Kruse, H.W.

    1981-01-01

    Inverse beta-decay reactions produced by electron neutrinos may compete with muon neutrino reactions in experiments utilizing the neutrino flux from a beam stop. The cross section and angular distribution for one such reaction, ν/sub e/ 208 Pb → 208 Bi e - , have been calculated with the aid of the results of an investigation of 208 Pb (p,n) 208 Bi at low momentum transfer. The implications of this reaction on an experiment to study neutrino oscillation are discussed. 2 figures

  13. Stretched configuration of states as inferred from γ-ray angular distributions in {sup 40}Ar + {sup 208}Pb neutron transfer reactions

    Energy Technology Data Exchange (ETDEWEB)

    Colovic, P.; Szilner, S.; Mijatovic, T.; Jelavic Malenica, D.; Soic, N. [Ruder Boskovic Institute, Zagreb (Croatia); Corradi, L.; Fioretto, E.; Stefanini, A.M.; Valiente-Dobon, J.J. [Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro (Italy); Pollarolo, G. [Dipartimento di Fisica Teorica, Universita di Torino (Italy); Istituto Nazionale di Fisica Nucleare, Torino (Italy); Goasduff, A. [Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro (Italy); Dipartimento di Fisica, Universita di Padova (Italy); Istituto Nazionale di Fisica Nucleare, Padova (Italy); Montanari, D. [Dipartimento di Fisica, Universita di Padova (Italy); Istituto Nazionale di Fisica Nucleare, Padova (Italy); Universite de Strasbourg, Institut Pluridisciplinaire Hubert Curien, CNRS-IN2P3, Strasbourg (France); Chapman, R.; Smith, J.F. [University of the West of Scotland, School of Engineering and Computing, Paisley (United Kingdom); Gadea, A. [Instituto de Fisica Corpuscular, CSIC-Universitat de Valencia, Valencia (Spain); Haas, F. [Universite de Strasbourg, Institut Pluridisciplinaire Hubert Curien, CNRS-IN2P3, Strasbourg (France); Marginean, N.; Ur, C.A. [Horia Hulubei National Institute of Physics and Nuclear Engineering and ELI-NP, Bucharest (Romania); Mengoni, D.; Montagnoli, G.; Scarlassara, F. [Dipartimento di Fisica, Universita di Padova (Italy); Istituto Nazionale di Fisica Nucleare, Padova (Italy); Milin, M. [University of Zagreb, Department of Physics, Faculty of Science, Zagreb (Croatia)

    2017-08-15

    Angular distributions of γ-rays for selected transitions in {sup 40,41,42}Ar isotopes have been studied with the PRISMA magnetic spectrometer coupled to the CLARA γ array. These transitions were populated in Ar isotopes reached via neutron transfer in the {sup 40}Ar + {sup 208}Pb reaction. By comparison with the shape of the experimental angular distribution of the known E2 transitions we established more firmly the spin and parity of excited states. In particular, in {sup 41}Ar for the (11/2{sup -}) state through the (11/2{sup -}) → 7/2{sup -} transition whose structure was discussed in terms of a phonon-fermion coupled state. The comparison with the expected fully aligned spin indicated that a high level of spin alignment has been reached. (orig.)

  14. Heavy ion coulomb excitation and gamma decay studies of the one and two phonon giant dipole resonances in 208Pb and 209Bi

    International Nuclear Information System (INIS)

    Mueller, P.E.; Beene, J.R.; Bertrand, F.E.; Halbert, M.L.; Olive, D.H.; Varner, R.L.; Sherrill, B.; Thoennessen, M.; Lautridou, P.; Lefevre, F.; Marques, M.; Matulewicz, T.; Mittig, W.; Ostendorf, R.; Roussel-Chomaz, P.; Schutz, Y.; Pol, J. van; Wilschut, H.W.; Diaz, J.; Ferrero, J.L.; Marin, A.

    1994-01-01

    Projectile - phonon coincidences were measured for the scattering of an 80 MeV/nucleon 64 Zn beam from 208 Pb and 209 Bi targets at the GANIL heavy ion accelerator facility. Projectile-like particles between 0.5 and 4.5 relative to the incident beam direction were detected in the SPEG energy loss spectrometer where their momentum, charge, and mass were determined. Photons were detected in the BaF 2 scintillation detector array TAPS. Light charged particles produced in the reaction were detected in the KVI Forward Wall. The analysis of the data acquired in this experiment is focused on three different phenomena: (1) the two phonon giant dipole resonance, (2) time dependence of the decay of the one phonon giant dipole resonance, and (3) giant resonance strength in projectile nuclei. (orig.)

  15. Study of deep inelastic collisions in the heavy-ion interaction of (14.0MeV/u){sup 208}Pb+{sup 238}U

    Energy Technology Data Exchange (ETDEWEB)

    Baluch, J J [Department of Physics, Gomal University, D. I. Khan (Pakistan); Khan, E U [Physics Research Division, Pakistan Institute of Nuclear Science and Technology, Islamabad (Pakistan); Tahseen, R [Department of Physics, Gomal University, D. I. Khan (Pakistan); Qureshi, I E [Physics Research Division, Pakistan Institute of Nuclear Science and Technology, Islamabad (Pakistan); Nasir, Tabassum [Department of Physics, Gomal University, D. I. Khan (Pakistan); Hassan, Najam ul [Department of Physics, Gomal University, D. I. Khan (Pakistan)

    2006-02-15

    Using mica as a passive detector and employing the 2{pi}-geometry technique (14.0MeV/u) {sup 208}Pb+{sup 238}U heavy-ion nuclear interaction has been studied. The particle tracks were converted into their actual lengths and polar angles through simple geometry. The elastic binary events so bifurcated were used to deduce the coefficients to analyze the three prong events. The relative velocities of the correlated fission fragments were calculated at the second stage of the reaction in order to construct the intermediate stage of the reaction, and hence, determine the pre-fission masses integrated over all angles and energies. The angular distribution of fission fragments within the reaction plane provided the information about the speed of the reaction and proximity effect.

  16. Study of deep inelastic collisions in the heavy-ion interaction of (14.0MeV/u)208Pb+238U

    International Nuclear Information System (INIS)

    Baluch, J.J.; Khan, E.U.; Tahseen, R.; Qureshi, I.E.; Nasir, Tabassum; Hassan, Najam ul

    2006-01-01

    Using mica as a passive detector and employing the 2π-geometry technique (14.0MeV/u) 208 Pb+ 238 U heavy-ion nuclear interaction has been studied. The particle tracks were converted into their actual lengths and polar angles through simple geometry. The elastic binary events so bifurcated were used to deduce the coefficients to analyze the three prong events. The relative velocities of the correlated fission fragments were calculated at the second stage of the reaction in order to construct the intermediate stage of the reaction, and hence, determine the pre-fission masses integrated over all angles and energies. The angular distribution of fission fragments within the reaction plane provided the information about the speed of the reaction and proximity effect

  17. Analysis of the intermediate stage in the heavy ion interactions of {sup 208}Pb+{sup 197}Au and {sup 197}Au+{sup 197}Au

    Energy Technology Data Exchange (ETDEWEB)

    Nasir, Tabassum [Department of Physics, Gomal University D.I. Khan (Pakistan); Khan, E.U. [Department of Physics, CIIT, Islamabad (Pakistan)], E-mail: ehsan@comsats.edu.pk; Baluch, J J [Department of Environmental Sciences, CIIT, Abbottabad (Pakistan); Qureshi, I E [Pakistan Atomic Energy Commission, P.O. Box 1114, Islamabad (Pakistan); Sajid, M; Shahzad, M I [Physics Division, PINSTECH, P.O. Nilore, Islamabad (Pakistan)

    2008-08-15

    Two different projectiles {sup 208}Pb and {sup 197}Au at the same energy (11.67MeV/u) have been bombarded on {sup 197}Au target to study heavy ion interactions using mica as a passive detector. In this paper we present results on the study of energy damping and time scale of the existence of di-nuclear composite system in the intermediate reaction step. The plots of Q-values as well as reaction cross sections in various angular bins of scattering angles suggest that K.E. damping was complete and dynamic equilibrium was established between the first and second reaction steps. The time scale of this duration was also determined.

  18. Production of n-rich Nuclei along the Closed Shell N=126 in the collision 136Xe + 208Pb @E lab =870 MeV

    Science.gov (United States)

    Quero, D.; Vardaci, E.; Kozulin, E. M.; Zagrebaev, V. A.; Corradi, L.; Pulcini, A.; La Rana, G.; Itkis, I. M.; Knyazheva, G. N.; Novikov, K.; Harca, I.; Fioretto, E.; Stefanini, A. M.; Montanari, D.; Montagnoli, G.; Scarlassara, F.; Szilner, S.; Mijatović, T.; Trzaska, W. H.

    2018-05-01

    Multi-nucleon transfer reactions are nowadays the only known mean to produce neutron-rich nuclei in the Terra Incognita. The closed-shell region N=126 is crucial for both studying shell-quenching in exotic nuclei and the r-process, being its last “waiting-point”. The choice of suitable reactions is challenging and a favorable case is 136Xe+208Pb, near the Coulomb barrier, because their neutron shell-closures play a stabilizing role, favoring the proton-transfer from lead to xenon. TOF-TOF data were analyzed to reconstruct the mass-energy distribution of the primary fragments. Preliminary results of an experiment held at Laboratori Nazionali di Legnaro with PRISMA, aimed at A and Z identification of the products, will be shown.

  19. Calculation of proton and neutron emission spectra from proton reactions with 90Zr and 208Pb to 160 MeV with the GNASH code

    International Nuclear Information System (INIS)

    Young, P.G.; Chadwick, M.B.

    1994-01-01

    A number of modifications have been made to the reaction theory code GNASH in order the accuracy of calculations at incident particle energies up to 200 MeV. Direct reaction a level density models appropriate for higher energy calculations are now used in the code, and most importantly, improved preequilibrium models have been incorporated into the code system. The code has been used to calculate proton-induced reactions on 90 Zr and 208 Pb for the International Code and Model Intercomparison for Intermediate Energy Reactions organized by the NEA. Calculations were performed with GNASH at incident proton energies of 25, 45, 80, and 160 mev using both the exciton model and Feshbach-Kerman-Koonin theory for the preequilibrium component. The models and procedures used in the GNASH calculations with the exciton model are described here. The results are compared to experimental data and to results from the GNASH calculations with Feshbach-Kerman-Koonin preequilibrium theory

  20. Characteristics of latent damage trails due to high energy 208Pb and 238U ions in CR-39 and muscovite mica

    International Nuclear Information System (INIS)

    Chohan, A.S.; Akhtar, S.M.

    1988-01-01

    Experiments have been performed to study the characteristics of latent damage trails produced by (a) 17.14 MeV/nucleon- 208 Pb ions in mica and CR-39 track detectors and (b) 13.7 MeV/nucleon- 238 U in CR-39 track detectors. The parameters studied include (a) V t , average etching velocity along the track, (b) thermal stability of the latent damage trails, (c) the total etchable ranges, and (d) V g the general etching velocity of CR-39 track detectors previously annealed at different temperatures. It has been observed that the latent damage trails in CR-39 are greatly affected at temperatures around 200 0 C in CR-39 track detectors. The general etching velocity of a CR-39 detector has been found to increase with increasing annealing temperatures. (author)

  1. VEDENJSKE MOTNJE PRI OTROCIH

    OpenAIRE

    Jaušovec, Špela

    2015-01-01

    Osnovni namen magistrskega dela je prispevati k boljšemu razumevanju motenj vedenja pri otrocih in mladostnikih ter obravnavati vpliv motenj vedenja na otrokovo funkcioniranje in vedenje. O motnjah vedenja je napisanega že veliko, še več pa ostaja neraziskanega in nerazumljenega. Magistrsko delo je zasnovano teoretično. S pomočjo strokovne literature in virov tako poskuša podrobno opredeliti motnje vedenja, njihove varovalne dejavnike in dejavnike tveganja, definirati družinsko in šolsko...

  2. Dieta pri hiperholesterolemiji

    OpenAIRE

    Čerček Vilhar, Emanuela

    2017-01-01

    Holesterol je maščobna molekula, ki v telesu opravlja mnogo funkcij. Njegova biosinteza in pot po telesu kot nepolarna molekula je izredno zapletena. Pri tem se vključuje v lipoproteine in prehaja v jetra, kjer poteka glavna pot presnavljanja ter tvorba žolčnih soli. Značilno je, da holesterol v našem organizmu izvira iz dveh virov. Eno tretjino ga zaužijemo s hrano, preostanek pa ga tvorimo sami iz predhodne molekule acetil-CoA. Ljudje se v današnjem času čedalje pogosteje srečujejo s poviša...

  3. Understanding the two neutron transfer reaction mechanism in {sup 206}Pb({sup 18}O,{sup 16}O){sup 208}Pb

    Energy Technology Data Exchange (ETDEWEB)

    Parmar, A.; Sonika [Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai - 400 085 (India); Roy, B.J., E-mail: bjroy@barc.gov.in [Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai - 400 085 (India); Jha, V.; Pal, U.K. [Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai - 400 085 (India); Sinha, T. [High Energy Nuclear and Particle Physics Division, Saha Institute of Nuclear Physics, Kolkata - 700 064 (India); Pandit, S.K.; Parkar, V.V.; Ramachandran, K.; Mahata, K.; Santra, S.; Mohanty, A.K. [Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai - 400 085 (India)

    2015-08-15

    The absolute cross sections for elastic scattering and two-neutron transfer reaction for {sup 18}O + {sup 206}Pb system have been measured at an incident energy near the Coulomb barrier. Detailed coupled reaction channel calculations have been carried out for description of the measured angular distributions for the elastic scattering and transfer reactions simultaneously. The two-neutron transfer reaction {sup 206}Pb({sup 18}O, {sup 16}O){sup 208}Pb in the g.s. → g.s. transition is analyzed in (i) extreme cluster model assuming a di-neutron transfer, (ii) two-step successive transfer, and (iii) microscopic approach (independent coordinate scheme) of simultaneous transfer of two neutrons. The relative importance of one step simultaneous transfer versus two-step successive transfer has been studied. Present analysis suggests dominance of cluster transfer of a di-neutron. The contribution from the two-step sequential processes is less significant, however, the combined “two-step plus simultaneous (microscopic)” calculations give a reasonably good agreement with the measurement. The possibility of multi-step route via projectile and target excitations and contribution from such indirect transfer paths to the present two-neutron transfer cross section has been investigated.

  4. Unified description of the neutron-/sup 208/Pb mean field between -20 and +165 MeV from the dispersion relation constraint

    International Nuclear Information System (INIS)

    Johnson, C.H.; Horen, D.J.; Mahaux, C.

    1987-01-01

    The real part of the central neutron-/sup 208/Pb mean field is the sum of a Hartree-Fock component plus a dispersive component. In keeping with theoretical expectations, the Hartree-Fock field is assumed to have a Woods-Saxon shape whose depth decreases exponentially with increasing energy and whose radius and diffuseness are independent of energy. The dispersive component is determined from the imaginary part of the optical-model potential by making use of the dispersion relation which connects these two quantities. The imaginary part is written as the sum of a volume and a surface-peaked contribution. The dispersion relation then implies that the real dispersive contribution is also the sum of volume and surface-peaked components. The parameters of the complex mean field are determined by fitting the available differential and polarization cross sections in the energy domain [4, 40 MeV] and the total cross sections in the domain [1,120 MeV]; these data are contained in previous published or unpublished reports, but new measurements of the total cross sections are presented from 1 to 25 MeV. Good fits to these cross sections, and also to unpublished total cross sections for energies up to 165 MeV, are obtained despite the fact that the number of adjusted parameters is quite small because of our use of the constraint implied by the dispersion relation

  5. Comparison of reactions for the production of 258,257Db: 208Pb(51V,xn) and 209Bi(50Ti,xn)

    Energy Technology Data Exchange (ETDEWEB)

    Gates, Jacklyn M.; Nelson, Sarah L.; Gregorich, Kenneth E.; Dragojevic, Irena; Dullmann, Christoph E.; Ellison, Paul A.; Folden III, Charles M.; Garcia, Mitch A.; Stavsetra, Liv; Sudowe, Ralf; Hoffman, Darleane C.; Nitsche, Heino

    2008-09-29

    Excitation functions for the 1n and 2n exit channels of the 208Pb(51V,xn)259-xDb reaction were measured. A maximum cross section of the 1n exit channel of 2070+1100/-760 pb was measured at an excitation energy of 16.0 +- 1.8 MeV. For the 2n exit channel, a maximum cross section of 1660+450/-370 pb was measured at 22.0 +- 1.8 MeV excitation energy. The 1n excitation function for the 209Bi(50Ti,n)258Db reaction was remeasured, resulting in a cross section of 5480+1750/-1370 pb at an excitation energy of 16.0 +- 1.6 MeV, in agreement with previous values [F. P. Hebberger, et al., Eur. Phys. J. A 12, 57 (2001)]. Differences in cross section maxima are discussed in terms of the fusion probability below the barrier.

  6. Multi-step processes in the (d, t) and (d, 3He) reactions on 116Sn and 208Pb targets at Ed = 200 MeV

    International Nuclear Information System (INIS)

    Langevin-Joliot, H.; Van de Wiele, J.; Guillot, J.; Koning, A.J.

    2000-01-01

    The role of multi-step processes in the reactions 116 Sn(d,t), 208 Pb(d,t) and 116 Sn(d, 3 He), previously studied at E d = 200 MeV at forward angles and for relatively low energy transfers, has been investigated. We have performed for the first time multi-step calculations taking into account systematically collective excitations in the second and higher order step inelastic transitions. A calculation code based on the Feshbach, Kerman and Koonin model has been modified to handle explicitly these collective excitations, most important in the forward angle domain. One step double differential pick-up cross sections were built from finite range distorted wave results spread in energy using known or estimated hole state characteristics. It is shown that two-step cross sections calculated using the above method compare rather well with those deduced via coupled channel calculations for the same collective excitations. The multi-step calculations performed up to 6 steps reproduce reasonably well the 115 Sn, 207 Pb and 115 In experimental spectra measured up to E x ∼- 40 MeV and 15 deg. The relative contributions of steps of increasing order to pick-up cross sections at E d = 200 MeV and 150 MeV are discussed. (authors)

  7. (p,t) reaction on /sup 12/C, /sup 54/Fe and /sup 208/Pb at 80 MeV. [80 MeV, angular distributions, zerio-range DWBA

    Energy Technology Data Exchange (ETDEWEB)

    Shepard, J R; Anderson, R E; Kraushaar, J J; Ristinen, R A [Colorado Univ., Boulder (USA). Nuclear Physics Lab.; Comfort, J R [Pittsburgh Univ., PA (USA). Dept. of Physics; King, N S.P. [Los Alamos Scientific Lab., NM (USA); Bacher, A; Jacobs, W W [Indiana Univ., Bloomington (USA). Dept. of Physics

    1979-06-11

    Angular distributions have been measured for the low-lying levels of the residual nuclei for the /sup 12/C, /sup 54/Fe and /sup 208/Pb(p,t) reactions at E/sub p/ = 80 MeV. The shapes of these angular distributions are generally well reproduced by the zero-range distorted-wave Born approximation (DWBA). Enhancement factors extracted from the data show that the DWBA predicts relative strengths consistent with those observed at lower bombarding energies. However, the overall empirical DWBA normalization at E/sub p/ = 80 MeV is observed to be 1/12(1/4) of that required at 40 MeV for /sup 208/Pb(/sup 54/Fe).

  8. Measurement of gamma-ray production cross sections in 27Al(n,xnγ) and 208Pb(n,pxnγ) reactions for neutron energies up to 400 MeV

    International Nuclear Information System (INIS)

    Pavlik, A.; Vonach, H.; Hitzenberger-Schauer, H.; Chadwick, M.B.; Nelson, R.O.; Haight, R.C.; Wender, S.A.; Young, P.G.

    1999-01-01

    The prompt γ-radiation from the interaction of fast neutrons with samples of Al and enriched 208 Pb was measured using the white neutron beam of the LANSCE/WNR facility at the Los Alamos National Laboratory. From the aluminum γ-ray spectra excitation functions for prominent γ-ray transitions in various residual nuclei (in the range from F to Al) were determined for neutron energies up to 400 MeV. In addition to the primary purpose of the 208 Pb experiment, the study of (n,xnγ) reactions leading to various lead isotopes. γ-ray transitions in residual Tl nuclei were analyzed and cross sections were derived in the neutron energy range from the effective threshold to 200 MeV. In the neutron energy range up to 200 MeV all experimental results were compared with nuclear model calculations using the code GNASH. (author)

  9. Study of elastic pion scattering from /sup 9/Be, /sup 28/Si, /sup 58/Ni, and /sup 208/Pb at 162 MeV. [Total and differential cross sections, scattering yields, scattering amplitudes

    Energy Technology Data Exchange (ETDEWEB)

    Devereux, M.J.

    1979-05-01

    Elastic pion scattering from /sup 9/Be, /sup 28/Si, /sup 58/Ni, and /sup 208/Pb at 162 MeV is analyzed and compared with an optical model theory which incorporates a pion--nucleon range. Excellent fits to the data are obtained in all but one case. The fitted values of the pion--nucleon range, as well as other fitted values are listed. 108 references.

  10. Analyzing power measurements for 209Bi(n,n) at 6 and 9 MeV and consistent dispersive optical-model analyses for n+209Bi and n+208Pb from -20 to +80 MeV

    International Nuclear Information System (INIS)

    Weisel, G.J.; Tornow, W.; Howell, C.R.; Felsher, P.D.; AlOhali, M.; Roberts, M.L.; Das, R.K.; Walter, R.L.; Mertens, G.

    1996-01-01

    High-accuracy measurements of A y (θ) data for elastic scattering for n+ 209 Bi have been performed at 6 and 9 MeV. The data are incorporated into a large database of σ(θ), A y (θ), and σ T for n+ 209 Bi covering the energy range 1.0 endash 80 MeV. A complementary database is constructed for n+ 208 Pb and a dispersive optical-model analysis is performed for both scattering systems while constraining many of the parameters to be identical for both systems. A good representation of both databases is obtained with conventional geometry and spin-orbit parameters. The 208 Pb model predicts quite well the measured energies of valence single-particle and single-hole bound states. Occupation probabilities and spectroscopic factors for the same bound states are also calculated. Finally, a fully constrained model is presented in which the only differences between the n+ 208 Pb and the n+ 209 Bi systems are the Fermi energy and the isospin dependence in the real volume potential. copyright 1996 The American Physical Society

  11. A precise 232Th-208Pb chronology of fine-grained monazite: Age of the Bayan Obo REE-Fe-Nb ore deposit, China

    Science.gov (United States)

    Wang, Jingyuan; Tatsumoto, M.; Li, X.; Premo, W.R.; Chao, E.C.T.

    1994-01-01

    We have obtained precise Th-Pb internal isochron ages on monazite and bastnaesite for the world's largest known rare earth elements (REE)-Fe-Nb ore deposit, the Bayan Obo of Inner Mongolia, China. The monazite samples, collected from the carbonate-hosted ore zone, contain extremely small amounts of uranium (less than 10 ppm) but up to 0.7% ThO2. Previous estimates of the age of mineralization ranged from 1.8 to 0.255 Ga. Magnetic fractions of monazite and bastnaesite samples (<60-??m size) showed large ranges in 232Th 204Pb values (900-400,000) and provided precise Th-Pb internal isochron ages for paragenetic monazite mineralization ranging from 555 to 398 Ma within a few percent error (0.8% for two samples). These results are the first indication that REE mineralization within the giant Bayan Obo ore deposit occurred over a long period of time. The initial lead isotopic compositions (low 206Pb 204Pb and high 208Pb 204Pb) and large negative ??{lunate}Nd values for Bayan Obo ore minerals indicate that the main source(s) for the ores was the lower crust which was depleted in uranium, but enriched in thorium and light rare earth elements for a long period of time. Zircon from a quartz monzonite, located 50 km south of the ore complex and thought to be related to Caledonian subduction, gave an age of 451 Ma, within the range of monazite ages. Textural relations together with the mineral ages favor an epigenetic rather than a syngenetic origin for the orebodies. REE mineralization started around 555 Ma (disseminated monazite in the West, the Main, and south of the East Orebody), but the main mineralization (banded ores) was related to the Caledonian subduction event ca. 474-400 Ma. ?? 1994.

  12. Spectroscopic factors measurement of the five first energy levels of lead 208 nucleus using the 208Pb(e,e'p207Tl* huge pulse transfer reaction

    International Nuclear Information System (INIS)

    Medaglia, R.

    1999-08-01

    In this work, the spectral functions and the spectroscopic factors of the first five energy levels of the lead 208 nucleus have been measured using the 208 Pb(e,e'p) 207 Tl * reaction. The aim is to characterize the effect of the nuclear environment on pulse and energy distributions of protons. In order to minimize the ejected proton-residual nucleus interactions in the final state, the measurement has been performed at 750 and 570 MeV/c pulse transfers, and thus for proton kinetic energies of 263 MeV and 161 MeV, contrarily to a previous measurement performed at 100 MeV. A kinematics with a transverse electromagnetic coupling, instead of a longitudinal one, has been used because of the important coupling dependence observed for medium nuclei. The experiment has been carried out at the NIKHEF electron accelerator and smoothing ring. The pulse distributions of the first five energy levels for a proton pulse range of 0 to 300 MeV/c have been extracted from the (e,e'p) cross sections. An integration of model-dependent distributions gives the spectroscopic factors which indicate the number of protons of each level. These data rae compared to models that include both the proton interactions in the final state and the coulomb distortions. The Pavie model reproduces well the observed distributions and the transfer dependence, while the Ohio model does not. The spectroscopic factors obtained with the Pavie model are the same for both transfers and are 20% higher as an average than the previous experiment performed at 450 MeV/c. However, they are 30% below the shell model. The uncertain estimation of the reaction mechanisms does not allow to consider this reduction as being due exclusively to nuclear structure effects. (J.S.)

  13. Study of the giant multipole resonances, especially the isoscalar giant E2 resonance in 208Pb by inelastic electron scattering with medium and high energy resolution

    International Nuclear Information System (INIS)

    Kuehner, E.G.F.

    1982-01-01

    In the nucleus 208 Pb giant multipole resonances were looked for by inelastic electron scattering up to excitation energies of Esub(x) = 35 MeV. Twelve spectra were taken up at incident energies of Esub(o) = 45-65 MeV under scattering angles from upsilon = 93 0 to 165 0 . The cross sections extracted from this were analyzed by means of DWBA calculations using RPA amplitudes from a model with separable residual interaction. Basing on this analysis for the first time it could be shown that the maximum in the electron scattering cross section at Esub(x) approx.= 14 MeV can be consistently described as a superposition of the Jsup(π) = 1 - , ΔT = 1 with a Jsup(π) = 0 + , ΔT = 0 giant resonance. Furthermore the spectra under backward scattering angles indicate the existence of a magnetic excitation at Esub(x) approx.= 15 MeV which is interpreted as Jsup(π) = 3 + giant resonance. Besides under forwards angles a further weak excitation appears at Esub(x) approx.= 14.6 MeV which is very well compatible with Jsup(π) = 2 + . At Esub(x) = 17.5 MeV a Jsup(π) = 3 - resonance was found which recently is also observed in (α,α') scattering experiments and therefore gets a ΔT = 0 assignment. A further resonance at Esub(x) approx.= 21 MeV has also Jsup(π) = 3 - character but has partly to be assigned to a Jsup(π) = 1 - , ΔT = 0 excitation. At Esub(x) = 23.8 MeV a Jsup(π) = 2 + excitation was found which gels because of model predictions a ΔT = 1 assignment. (orig./HSI) [de

  14. Study of the giant multipole resonances especially of the isoscalar giant E2 resonance in 208Pb by medium and high energy resolution inelastic electron scattering

    International Nuclear Information System (INIS)

    Kuehner, G.

    1982-01-01

    In the nucleus 208 Pb giant multipole resonances up to excitation energies of Esub(x) = 35 MeV were looked for by medium resolution inelastic electron scattering. Twelve spectra were taken up at incident energies of E 0 = 45-65 MeV under scattering angles from upsilon = 93 0 to 165 0 . The cross sections extracted from this were analyzed by means of DWBA calculations using RPA amplitudes from a model with separable residual interaction. On the base of this analysis for the first time it could be shown that the maximum in the electron scattering cross section at Esub(x) approx.= 14 MeV can be consistently described as superposition of the Jsup(π) = 1 - , ΔT = 1 with a Jsup(π) = 0 + , ΔT = 0 giant resonance. Furthermore the spectra under backward scattering angles indicate the existence of a magnetic excitation at Esub(x) approx.= 15 MeV which is interpreted as Jsup(π) = 3 + giant resonance. Besides under forward angles a further weak excitation at Esub(x) approx.= 14.6 MeV appears which is very well compatible with Jsup(π) = 2 + . At Esub(x) = 17.5 MeV a Jsup(π) = 3 - resonance was found which recently is observed also in (α, α') experiments and therefore gets a ΔT = 0 assignment. A further resonance at Esub(x) approx.= 21 MeV has also a Jsup(π) = 3 - character but has to be partly assigned to a Jsup(π) = 1 - , ΔT = 0 excitation. At Esub(x) = 23.8 MeV a Jsup(π) = 2 + excitation was found which gets because of model predictions a ΔT = 1 assignment. (orig./HSI) [de

  15. Measurement of isotopic cross sections of the fission fragments produced in 500 AMeV {sup 208}Pb + p reaction; Etude de la production des fragments de fission issus de la reaction {sup 208}Pb + p a 500 AMeV

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez-Dominguez, B

    2003-03-01

    The aim of this work is the study of the fission fragments produced in the spallation reaction {sup 208}Pb + p at 500 AMeV. The fission fragments from Z=23 up to Z=59 have been detected and identified by using the inverse kinematics technique with the high-resolution spectrometer FRS. The production cross sections and the recoil velocities of 430 nuclei have been measured. The measured data have been compared with previous data. The isotopic distributions show a high precision. However, the absolute value of the fission cross section is higher than expected. From the experimental data the characteristics of the average fissioning system have been reconstructed (Z{sub fis}, A{sub fis}, E*{sub fis}). In addition, the number of post-fission neutrons emitted from the fission fragments, v{sub post}, has been determined by using a new method. The experimental data have been compared to the two-steps models describing the spallation reaction. The impact of the model parameters on the observables has been analysed and the reasons Leading to the observed differences between the codes are also presented. This analyse shows a good agreement with the INCL4+ABLA code. (author)

  16. /sup 13/C(p vector,d)/sup 12/C and /sup 208/Pb(p vector,d)/sup 207/Pb reactions at 123 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Kraushaar, J J; Shepard, J R [Colorado Univ., Boulder (USA). Nuclear Physics Lab.; Miller, D W; Jacobs, W W; Jones, W P; Devins, D W [Indiana Univ., Bloomington (USA). Dept. of Physics

    1983-02-01

    Cross-section and analyzing power angular distributions have been measured for /sup 13/C(p vector,d) and /sup 208/Pb(p vector, d) at 123 MeV to the strong low-lying residual states in both final nuclei. The data have been compared with the results of both zero- and exact-finite-range distorted wave calculations and some serious discrepancies were noted for the analyzing powers. For the case of the /sup 13/C calculations, marked improvement in the description of the data was achieved with the use of a damping factor in the nuclear interior.

  17. Study of the /sup 58/Ni, /sup 90/Zr and /sup 208/Pb(p,d) reactions at 121 MeV. [DWBA, angular distributions, spectroscopic factors, finite range calculations

    Energy Technology Data Exchange (ETDEWEB)

    Anderson, R E; Kraushaar, J J; Shepard, J R [Colorado Univ., Boulder (USA). Nuclear Physics Lab.; Comfort, J R [Indiana Univ., Bloomington (USA). Dept. of Physics

    1978-01-01

    The (p,d) reaction has been studied on /sup 58/Ni, /sup 90/Zr and /sup 208/Pb at 121 MeV in order to test the applicability of the usual DWBA methods to higher energy data. The calculations describe the angular distribution for the strongly excited low-lying states reasonably well when adiabatic-deuteron optical potentials are used. Some discrepancies in shape persist, however, and some values of the spectroscopic factors differ from lower energy data in spite of many variations in the calculations. By use of exact finite-range calculations a value of D/sup 2//sub 0/ = 1.23 x 10/sup 4/ MeV/sup 2/.fm/sup 3/ was found for use at 121 MeV. Deuteron D-state contributions were negligible at forward angles and two-step contributions do not appear more significant than for data at lower energy.

  18. Elastic scattering of protons by 16O, 40Ca and 208Pb at 200, 500 and 800 MeV: 2, Effects of vacuum polarization and Pauli blocking corrections

    International Nuclear Information System (INIS)

    Ottenstein, N.; Wallace, S.J.; Tjon, J.A.

    1987-11-01

    Dirac impulse approximation predictions for cross sections and spin observables in elastic proton scattering by 40 Ca and 208 Pb at energies of 200, 500 and 800 MeV are presented. The analysis is based on complete sets of Lorentz invariant NN amplitudes determined from a meson exchange model of the nuclear force. Effects of relativistic nuclear densities are explored including estimates of the vacuum polarization corrections based on quantum hadrodynamics. Effects of Pauli blocking are considered using the approximations of Murdock and Horowitz. A good description of the experimental data is obtained over a broad energy range and over a wide variation of nuclear size based on the generalized impulse approximation. Vacuum polarization corrections are found to enhance the agreement between theory and experiment. 18 refs., 8 figs

  19. Uporaba hipnoze pri preiskovanju kaznivih dejanj

    OpenAIRE

    Radić, Janja

    2016-01-01

    V svojem diplomskem delu predstavljam tehniko hipnoze kot metodo za izboljšanje spomina pri pričah in žrtvah kaznivih dejanj. Posvetim se pojmovanju in uporabi hipnoze skozi zgodovino, nato pa podam še njeno definicijo in tehnike. Poleg načina uporabe hipnoze pri preiskovanju kaznivih dejanj, predstavim tudi njene prednosti in slabosti, opišem potek hipnotiziranja ter vlogo in funkcijo hipnotizerja. V zadnjih dveh poglavjih pojasnim vpliv spomina na hipnotične informacije ter predstavim pravn...

  20. Presence of pRI1:

    DEFF Research Database (Denmark)

    Migura, Lourdes Garcia; Hasman, Henrik; Jensen, Lars Bogø

    2009-01-01

    This study focused on the molecular characterization of a small cryptic, mobilizable plasmid (6038 bp) sequenced from an E. faecium 9631160-1 of poultry origin. Sequence analysis of pRI1 revealed seven open reading frames. pRI1 contained an IS 100% identical to ISEfa4. This insertion element...... almost identical to the repA from the pEFNP1 and pKQ10 plasmids from E. faecium was also identified. Presence of the pRI1 replication initiation gene (rep) was analyzed in a panel of 159 E. faecium isolates of human and animal origin from different European countries, of which 60 tested positive...

  1. Measurement of conversion electrons with the $^{208}Pb(p,n)^{208}Bi$ reaction and derivation of the shell model proton neutron hole interaction from the properties of $^{208}Bi$

    CERN Document Server

    Maier, K H; Dracoulis, G D; Boutachkov, P; Aprahamian, A; Byrne, A P; Davidson, P M; Lane, G L; Marie-Jeanne, Mélanie; Nieminen, P; Watanabe, H

    2007-01-01

    Conversion electrons from 208Bi have been measured using singles and coincidence techniques with the 208Pb(p,n)208Bi reaction at 9 MeV. The new information on multipolarities and spins complements that available from recent gamma-gamma-coincidence studies with the same reaction [Boutachkov et al., Nucl. Phys. A768, 22 (2006)]. The results on electromagnetic decays taken together with information on spectroscopic factors from earlier single-particle transfer reaction measurements represent an extensive data set on the properties of the one-proton one-neutron-hole states below 3 MeV, a spectrum which is virtually complete. Comparison of the experimental observables, namely, energies, spectroscopic factors, and gamma-branching ratios, with those calculated within the shell model allows extraction of the matrix elements of the shell model residual interaction. More than 100 diagonal and nondiagonal elements can be determined in this way, through a least squares fit to the experimental data. This adjustment of the...

  2. Multi-step processes in the (d, t) and (d, {sup 3}He) reactions on {sup 116}Sn and {sup 208}Pb targets at E{sub d} = 200 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Langevin-Joliot, H.; Van de Wiele, J.; Guillot, J. [Institut de Physique Nucleaire, IN2P3/CNRS, 91 - Orsay (France); Koning, A.J. [Nuclear Research and Consultancy Group NRG, NL (Netherlands)

    2000-07-01

    The role of multi-step processes in the reactions {sup 116}Sn(d,t), {sup 208}Pb(d,t) and {sup 116}Sn(d,{sup 3}He), previously studied at E{sub d} = 200 MeV at forward angles and for relatively low energy transfers, has been investigated. We have performed for the first time multi-step calculations taking into account systematically collective excitations in the second and higher order step inelastic transitions. A calculation code based on the Feshbach, Kerman and Koonin model has been modified to handle explicitly these collective excitations, most important in the forward angle domain. One step double differential pick-up cross sections were built from finite range distorted wave results spread in energy using known or estimated hole state characteristics. It is shown that two-step cross sections calculated using the above method compare rather well with those deduced via coupled channel calculations for the same collective excitations. The multi-step calculations performed up to 6 steps reproduce reasonably well the {sup 115}Sn, {sup 207}Pb and {sup 115}In experimental spectra measured up to E{sub x}{approx}- 40 MeV and 15 deg. The relative contributions of steps of increasing order to pick-up cross sections at E{sub d} = 200 MeV and 150 MeV are discussed. (authors)

  3. Uporaba BIM pri projektiranju cestne infrastrukture

    OpenAIRE

    Svetina, Gregor

    2018-01-01

    Magistrsko delo obravnava uporabo informacijskega modeliranja gradenj (angl. Building Information Modeling, kratica BIM) v infrastrukturnih projektih. Pri tem je kot primer uporabljen projekt Druge cevi predora Karavanke, pri katerem je bil BIM dejansko uporabljen. Naredili smo modele cest, ki se bodo uporabljale za odvoz materiala na deponije. Najprej je predstavljenih nekaj osnov o BIM-u, vključno s predstavitvami lastnosti 3D, 4D, 5D in 6D modelov, ovrednotenjem BIM-a, stopnjami podrobn...

  4. Deeply bound π- states in 207Pb formed in the 208Pb(d,3He) reaction. II. Deduced binding energies and widths and the pion-nucleus interaction

    Science.gov (United States)

    Itahashi, K.; Oyama, K.; Hayano, R. S.; Gilg, H.; Gillitzer, A.; Knülle, M.; Münch, M.; Schott, W.; Kienle, P.; Geissel, H.; Iwasa, N.; Münzenberg, G.; Hirenzaki, S.; Toki, H.; Yamazaki, T.

    2000-08-01

    We find a remarkable agreement of the excitation energy spectrum of the 208Pb(d,3He) reaction measured at Td=600 MeV near the π- production threshold with its theoretical prediction. Their comparison leads us to assign the distinct narrow peak observed at about 5 MeV below the threshold to the formation of bound pionic states π-⊗207Pb of the quasisubstitutional configurations (2p)π-(3p3/2,3p1/2)-1n. A small bump observed on the tail of the peak is assigned to the pionic 1s state. The binding energies (Bnl) and the widths (Γnl) of the pionic orbitals are deduced to be B2p=5.13+/-0.02 (stat)+/-0.12 (syst) MeV and Γ2p=0.43+/-0.06 (stat)+/-0.06 (syst) MeV by decomposing the experimental spectrum into the pionic 1s and 2p components. While B2p and Γ2p are determined with small ambiguity, B1s and Γ1s are strongly correlated with each other, and are affected by the relative 1s/2p cross section ratio assumed, since the 1s component is observed only as an unresolved bump. Thus, we have to allow large uncertainties 6.6 MeV

  5. VLOGA DIGITALNIH POTRDIL PRI ELEKTRONSKEM POSLOVANJU

    OpenAIRE

    Zorman, Tjaša

    2010-01-01

    Uporaba elektronskega poslovanja je danes v svetu in pri nas zelo razširjena. Število uporabnikov elektronskega bančništva kot elementa elektronskega poslovanja se je od leta 2000 do leta 2008 povečalo skoraj za 30-krat. Vedno večje število uporabnikov kaže na pomembnost in uporabnost elektronskega bančništva pri nas. Del uspešnosti elektronskega bančništva lahko pripišemo njegovi varnosti, ki s svojimi elementi sodi v sam vrh kakovosti. Uporabniki elektronskega bančništva se zavedajo, d...

  6. Contribution to construction and setup of a detection system for the focal plan of the BBS spectrometer. Application to study of the neutron emission decay of the resonant states populated by the reaction (4He,3He) at 42 MeV/u in nuclei 208Pb and 209Pb

    International Nuclear Information System (INIS)

    Plankl-Chabib, Elke

    1999-01-01

    In order to realize an experimental program dedicated to nuclear structure studies we have conceived and constructed at IPN Orsay a detection system for the focal plane of the magnetic spectrometer BBS, installed at the cryogenic cyclotron AGOR of the laboratory KVI (The Netherlands). Two detection units, consisting each of two localization plans of the Cathode Strip Chamber (CSC) type, measure the position and angle of particle trajectory. This information is used for the determination of the reaction parameters at the target by a backtracking procedure. The identification of the reaction products is done by the measurement of their time-of-flight and energy loss. For light ions this task is assumed by plastic scintillators, and for heavy ions by a parallel plan detector (PPAC) and an ionization chamber. This detection system is well adapted to the requirements given by the detection of a large range of ions (protons to 36 Ar at energies of several tenths of MeV/nucleon) as well as the big acceptance, the small dispersion and the aberration of the BBS. The results of the test show the good performances of the detection system. In a first experiment the focal plane detection system was coupled to the neutron multidetector EVEN in order to study the decay of resonant high spin states at high excitation energies by the ( 4 He, 3 He) reaction on 207 Pb and 208 Pb targets. The transfer spectra, inclusive and in coincidence, of the nuclei 208 Pb and 209 Pb show a striking resemblance except for an excitation energy shift which is due to the hole in the last neutron shell of 207 Pb. The resonances at l 8 and l = 9 are clearly populated, in agreement with the predictions of the Bonaccorso-Brink model. A sizeable fraction of the decay of the l = 8 resonance is direct, but at excitation energies higher than 15 MeV (in 208 Pb) the decay is mostly statistical. (author)

  7. PriBots: Conversational Privacy with Chatbots

    OpenAIRE

    Harkous, Hamza; Fawaz, Kassem; Shin, Kang G.; Aberer, Karl

    2016-01-01

    Traditional mechanisms for delivering notice and enabling choice have so far failed to protect users’ privacy. Users are continuously frustrated by complex privacy policies, unreachable privacy settings, and a multitude of emerging standards. The miniaturization trend of smart devices and the emergence of the Internet of Things (IoTs) will exacerbate this problem further. In this paper, we propose Conversational Privacy Bots (PriBots) as a new way of delivering notice and choice through a two...

  8. VLOGA ODRASLIH OSEB PRI SPODBUJANJU BRALNE MOTIVACIJE

    OpenAIRE

    Kralj, Saša

    2010-01-01

    Branje je pomembna dejavnost, ki vpliva na osebnostni razvoj posameznika, učenje in učno uspešnost. Vse pozitivne plati branja se vse bolj pozabljajo ob hitrem tempu življenja. Učitelji in knjižničarji imajo velik pomen pri spodbujanju branja. S svojim znanjem o dobrobiti branja, z uporabo različnih metod in oblik dela lahko pritegnejo starše in skupaj spodbujajo učence k branju ter tako skušajo vzgojiti bralca za vse življenje. Namen diplomskega dela je osvetliti pomen branja, bralne pismeno...

  9. G-Quadruplexes influence pri-microRNA processing.

    Science.gov (United States)

    Rouleau, Samuel G; Garant, Jean-Michel; Bolduc, François; Bisaillon, Martin; Perreault, Jean-Pierre

    2018-02-01

    RNA G-Quadruplexes (G4) have been shown to possess many biological functions, including the regulation of microRNA (miRNA) biogenesis and function. However, their impact on pri-miRNA processing remains unknown. We identified G4 located near the Drosha cleavage site in three distinct pri-miRNAs: pri-mir200c, pri-mir451a, and pri-mir497. The folding of the potential G4 motifs was determined in solution. Subsequently, mutations disrupting G4 folding led to important changes in the mature miRNAs levels in cells. Moreover, using small antisense oligonucleotides binding to the pri-miRNA, it was possible to modulate, either positively or negatively, the mature miRNA levels. Together, these data demonstrate that G4 motifs could contribute to the regulation of pri-mRNA processing, a novel role for G4. Considering that bio-informatics screening indicates that between 9% and 50% of all pri-miRNAs contain a putative G4, these structures possess interesting potential as future therapeutic targets.

  10. Measurement of Ay(θ) for n+208Pb from 6 to 10 MeV and the neutron-nucleus interaction over the energy range from bound states at -17 MeV up to scattering at 40 MeV

    International Nuclear Information System (INIS)

    Roberts, M.L.; Felsher, P.D.; Weisel, G.J.; Chen, Z.; Howell, C.R.; Tornow, W.; Walter, R.L.; Horen, D.J.

    1991-01-01

    High-accuracy measurements of A y (θ) data for elastic scattering and inelastic scattering to the first excited state for n+ 208 Pb have been performed at 6, 7, 8, 9, and 10 MeV. In addition, σ(θ) was measured at 8 MeV. These data provide an important subset for the growing database for the n+ 208 Pb system from bound-state energies to energies above 40 MeV, the limit of the range of interest here. This database has been interpreted via several approaches. First, a conventional Woods-Saxon spherical optical was used to obtain three potential representations for the energy range from 4 to 40 MeV: ''best fits'' at each energy, constant-geometry global fit with linear energy dependences for the potential strengths for the range 4.0--40 MeV, and an extension of the latter model to allow a linear energy dependence on the radii and diffuseness. A preference for a complex spin-orbit interaction was observed in all cases. Second, the dispersion relation was introduced into the spherical optical model to obtain a more ''realistic'' representation. In our approach, the strength and shape of the real potential was modified by calculating the dispersion-relation contributions that originate from the presence of the surface and volume imaginary terms. Two potentials were developed, one based only on the scattering data (from 4.0 to 40 MeV) and another based additionally on single-particle and single-hole information down to a binding energy of 17 MeV. In addition, the σ(θ) and A y (θ) measurements were compared to earlier conventional and dispersion-relation models. One of the latter of these included an l dependence in the absorptive surface term, and we applied this model in the 6- to 10-MeV region to describe all the σ(θ) and the new A y (θ)

  11. Synthesis and Biological Activity of Diastereomeric and Geometric Analogs of Calcipotriol, PRI-2202 and PRI-2205, Against Human HL-60 Leukemia and MCF-7 Breast Cancer Cells

    Directory of Open Access Journals (Sweden)

    Andrzej Kutner

    2013-10-01

    Full Text Available Diastereomeric and geometric analogs of calcipotriol, PRI-2202 and PRI-2205, were synthesized as advanced intermediates from vitamin D C-22 benzothiazoyl sulfones and side-chain aldehydes using our convergent strategy. Calcitriol, calcipotriol (PRI-2201 and tacalcitol (PRI-2191 were used as the reference compounds. Among a series of tested analogs the diastereomeric analog PRI-2202 showed the strongest antiproliferative activity on the human breast cancer cell line MCF-7, whereas the geometric analog PRI-2205 was the weakest. Both analogs were less potent in antiproliferative activity against HL-60 cells compared to the reference compounds. The ability to potentiate antiproliferative effect of cisplatin or doxorubicin against HL-60 cells or that of tamoxifen against the MCF-7 cell line was observed at higher doses of PRI-2202 or PRI-2205 than those of the reference compounds. The proapoptotic activity of tamoxifen, expressed as the diminished mitochondrial membrane potential, as well as the increased phosphatidylserine expression, was partially attenuated by calcitriol, PRI-2191, PRI-2201 and PRI-2205. The treatment of the MCF-7 cells with tamoxifen alone resulted in an increase in VDR expression. Moreover, a further increase in VDR expression was observed when the analogs PRI-2201 or PRI-2205, but not PRI-2191, were used in combination with tamoxifen. This observation could partially explain the potentiation of the antiproliferative effect of tamoxifen by vitamin D analogs.

  12. Synthesis and Biological Activity of Diastereomeric and Geometric Analogs of Calcipotriol, PRI-2202 and PRI-2205, Against Human HL-60 Leukemia and MCF-7 Breast Cancer Cells.

    Science.gov (United States)

    Milczarek, Magdalena; Chodyński, Michał; Filip-Psurska, Beata; Martowicz, Agnieszka; Krupa, Małgorzata; Krajewski, Krzysztof; Kutner, Andrzej; Wietrzyk, Joanna

    2013-10-31

    Diastereomeric and geometric analogs of calcipotriol, PRI-2202 and PRI-2205, were synthesized as advanced intermediates from vitamin D C-22 benzothiazoyl sulfones and side-chain aldehydes using our convergent strategy. Calcitriol, calcipotriol (PRI-2201) and tacalcitol (PRI-2191) were used as the reference compounds. Among a series of tested analogs the diastereomeric analog PRI-2202 showed the strongest antiproliferative activity on the human breast cancer cell line MCF-7, whereas the geometric analog PRI-2205 was the weakest. Both analogs were less potent in antiproliferative activity against HL-60 cells compared to the reference compounds. The ability to potentiate antiproliferative effect of cisplatin or doxorubicin against HL-60 cells or that of tamoxifen against the MCF-7 cell line was observed at higher doses of PRI-2202 or PRI-2205 than those of the reference compounds. The proapoptotic activity of tamoxifen, expressed as the diminished mitochondrial membrane potential, as well as the increased phosphatidylserine expression, was partially attenuated by calcitriol, PRI-2191, PRI-2201 and PRI-2205. The treatment of the MCF-7 cells with tamoxifen alone resulted in an increase in VDR expression. Moreover, a further increase in VDR expression was observed when the analogs PRI-2201 or PRI-2205, but not PRI-2191, were used in combination with tamoxifen. This observation could partially explain the potentiation of the antiproliferative effect of tamoxifen by vitamin D analogs.

  13. Učinkovitost terapevtskega ultrazvoka pri zmanjševanju bolečine pri artrozi kolena

    OpenAIRE

    Blas, Marjeta

    2018-01-01

    Uvod: Artroza je degenerativni proces, ki lahko privede do deformacije kolenskega sklepa ter predvsem pri starejših povzroči težave pri vsakodnevnih opravilih in zmanjša kakovost njihovega življenja. Glavni simptom je bolečina. Pomembno vlogo pri zdravljenju ima fizioterapija. Inštrumentalna fizioterapija, kot je ultrazvok, se pogosto uporablja za zmanjševanje bolečine ali kot predpriprava na vadbo. Namen: Namen diplomskega dela je na osnovi pregleda objavljene strokovne in znanstvene literat...

  14. Izzivi in trendi pri vzpostavitvi managmenta destinacije Mirnska dolina

    OpenAIRE

    Žibert, Maja

    2015-01-01

    Diplomska naloga z naslovom Izzivi in trendi pri vzpostavitvi managmenta destinacije Mirnska dolina v veliki meri preverja izvajanje vsebine dokumenta Strateško akcijski načrt pri vzpostavitvi destinacije Mirnska dolina na terenu. Vsebina dokumenta se dotika posameznih prioritet trajnostnega razvoja destinacije. Na terenu smo preko intervjujev s posameznimi deležniki vseh treh sektorjev, ki sestavljajo destinacijo želeli izvedeti, kako oni doživljajo prioritete razvoja. V diplomski nalogi je ...

  15. Spectroscopic study of {sup 206,207,208}Pb isotopes by high resolution analysis of 24.5 MeV proton scattering; Etude spectroscopique des isotopes 206, 207 et 208 du plomb par analyse a haute resolution de la diffusion de protons de 24,5 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Vallois, G [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1968-03-01

    {sup 206,207,208}pb have been studied by 24.5 MeV proton inelastic scattering with a resolution of 20 keV. The angular distributions of the differential cross-sections corresponding to the different excited levels have been measured in a large angular region and analysed with the DWBA.This work shows that it exists between 4 and 5 MeV of excitation energy some strongly excited levels corresponding to transfer momenta l = 2, 4, 6 and 8. The single particle-hole models do not explain these states; so it will probably be necessary to introduce some several particle - hole configurations. (author) [French] Les isotopes 206, 207 et 208 du plomb ont ete etudies par diffusion inelastique de protons de 24,5 MeV avec une resolution de 20 keV. Les distributions angulaires des sections efficaces differentielles correspondant aux differents niveaux excites ont ete mesurees sur un large domaine angulaire et analysees a l'aide de la DWBA. Ce travail met en evidence l'existence, entre 4 et 5 MeV d'excitation, de niveaux fortement excites correspondant a des moments de transfert de 2, 4, 6 et 8. Les modeles a simple particule-trou ne rendant pas compte de ces niveaux, il faudra sans doute recourir a des configurations a plusieurs particules-trous pour les expliquer. (auteur)

  16. POGODBENA IN IZVENPOGODBENA RAZMERJA MSP-JEV PRI MEDNARODNIH POSLIH

    OpenAIRE

    Vindiš, Jure

    2011-01-01

    Problem, katerega si bomo postavili v ospredje, je, kako so urejena pogodbena razmerja pri mednarodnih poslih malih in srednje velikih podjetij. Skušali bomo ugotoviti, v kolikšni meri so pogodbe pri poslovanju doma in mednarodni menjavi determinirane, in kateri so mehanizmi, s katerimi se podjetja zavarujejo, da se pogodbeni partner drži pogodbe. Osnovo za raziskovalna izhodišča bomo jemali iz študije iz leta 1963 z naslovom Preliminarna študija izvenpogodbenih razmerij v pos...

  17. Levkemija pri otroku in problemi prehranjevanja in pitja

    OpenAIRE

    Šinkovec, Sara

    2017-01-01

    Uvod: Podhranjenost in kaheksija sta pogosta pri otrocih z levkemijo in sta pokazatelja slabše prognoze. Slabo prehransko stanje otroka je povezano z večjim številom stranskih učinkov zdravljenja, s slabšim odzivom na zdravljenje in krajšim preživetjem. Funkcionalno stanje otrok in kakovost njihovega življenja sta slabša. Namen: Namen diplomskega dela je opisati problem prehranjevanja in pitja pri otroku z levkemijo. Metode dela: V diplomskem delu je uporabljena deskriptivna metoda dela s kr...

  18. PRiFi Networking for Tracking-Resistant Mobile Computing

    Science.gov (United States)

    2017-11-01

    conjunction with other relevant services, including Tor for tracking-resistant inter-organizational communication, distributed protocols for the...is a hardened, fully deployable PriFi implementation that can be used in conjunction with other relevant services, including Tor for tracking

  19. Contribution to construction and setup of a detection system for the focal plan of the BBS spectrometer. Application to study of the neutron emission decay of the resonant states populated by the reaction ({sup 4}He,{sup 3}He) at 42 MeV/u in nuclei {sup 208}Pb and {sup 209}Pb; Contribution a la construction et a la mise au point d'un systeme de detection pour le plan focal du spectrometre BBS. Application a l'etude de la decroissance par emission de neutrons d'etats resonants peuples par la reaction ({sup 4}He,{sup 3}He) a 42 MeV/u dans les noyaux {sup 208}Pb et {sup 209}Pb

    Energy Technology Data Exchange (ETDEWEB)

    Plankl-Chabib, Elke [Inst. de Physique Nucleaire, Paris-11 Univ., 91 - Orsay (France)

    1999-06-11

    In order to realizean experimental program dedicated to nuclear structure studies we have conceived and constructed at IPN Orsay a detection system for the focal plane of the magnetic spectrometer BBS, installed at the cryogenic cyclotron AGOR of the laboratory KVI (The Netherlands). Two detection units, consisting each of two localization plans of the Cathode Strip Chamber (CSC) type, measure the position and angle of particle trajectory. This information is used for the determination of the reaction parameters at the target by a backtracking procedure. The identification of the reaction products is done by the measurement of their time-of-flight and energy loss. For light ions this task is assumed by plastic scintillators, and for heavy ions by a parallel plan detector (PPAC) and an ionization chamber. This detection system is well adapted to the requirements given by the detection of a large range of ions (protons to {sup 36}Ar at energies of several tenths of MeV/nucleon) as well as the big acceptance, the small dispersion and the aberration of the BBS. The results of the test show the good performances of the detection system. In a first experiment the focal plane detection system was coupled to the neutron multidetector EVEN in order to study the decay of resonant high spin states at high excitation energies by the ({sup 4}He, {sup 3}He) reaction on {sup 207}Pb and {sup 208}Pb targets. The transfer spectra, inclusive and in coincidence, of the nuclei {sup 208}Pb and {sup 209}Pb show a striking resemblance except for an excitation energy shift which is due to the hole in the last neutron shell of {sup 207}Pb. The resonances at l 8 and l = 9 are clearly populated, in agreement with the predictions of the Bonaccorso-Brink model. A sizeable fraction of the decay of the l = 8 resonance is direct, but at excitation energies higher than 15 MeV (in {sup 208}Pb) the decay is mostly statistical.

  20. Production cross-sections of pions and kaons in proton-nucleus collisions around 1 GeV - Measurement of the production cross-sections of light charged particles in collisions between 62.9 GeV protons and "2"0"8Pb nuclei

    International Nuclear Information System (INIS)

    Guertin, A.

    2001-01-01

    A charged kaon includes a strange anti-quark that cannot be re-absorbed by matter which make kaons an interesting probe of nuclear matter. The first part of this work is dedicated to the production cross-sections of pions and kaons in proton-nucleus collision around 1 GeV. The molecular quantum dynamic model used for simulating proton-nucleus is presented and the total cross-sections of the reactions implemented in the model are described. Then, the impact of the neutron's spectral function on pion and kaon production is assessed in double differential cross-sections. The consequences of the correlations observed between nucleons are discussed. The simple phenomenological approach we have developed to take into account 2 nucleon correlations gives good results for the doubly differential production cross-section of pions and kaons whatever the target nucleus. The second part of this work is dedicated to the measurement of the production of light charged particles (p, d, t, "3He, α) and neutron production in collisions between 62,9 MeV protons with "2"0"8Pb nuclei. The experimental setting is installed on the S2 line of the CYCLONE cyclotron (Belgium), the detection system is composed of 7 triple telescopes (Si, Si and CsI(Tl)). The separation and identification of particles is made through 2 methods: the E-ΔE method based on the energy losses in the different detectors and the discrimination method based on the different shapes of the quick and slow signals of the CsI crystal. The extraction of the cross-section values is detailed. We have compared the values obtained with 3 theoretical models: the exciton model (GNASH code), the F.K.K. (Feshbach-Kerman-Koonin) theory (MINGUS code) and a more phenomenological model able to simulate hadron reactions on nuclei for a very broad range of energy (FLUKA code)

  1. Electromagnetic Dissociation of Target Nuclei by $^{208}$Pb Projectiles

    CERN Multimedia

    Petridis, A; Wohn, F K

    2002-01-01

    % NA53 \\\\ \\\\ The purpose of this experiment is to study the process of electromagnetic dissociation (ED) that occurs at impact parameters large enough so that there is no nuclear interaction. In these cases strong electromagnetic fields are produced for a short time at the nucleus. For large charges and ultrarelativistic energies, the intense electromagnetic pulse produces cross-sections much larger than the total hadronic cross-section. These effects place significant constraints on the storage times of the heavy ion beams planned for RHIC and LHC.\\\\ \\\\In this experiment we measure the cross-sections for the one- and two-neutron removal processes resulting from the interaction of 160 and 40~GeV/nucleon Pb beams on Au and Co targets. Thin Au targets were bombarded in the beam line of the NA50 experiment. Gamma rays from the residual nuclides produced in the bombardment were measured to determine the saturation activities of $^{196}$Au and $^{195}$Au resulting from ED of the Au target. This along with cross-se...

  2. Energy spectrum of 208Pb(n,x) reactions

    Science.gov (United States)

    Tel, E.; Kavun, Y.; Özdoǧan, H.; Kaplan, A.

    2018-02-01

    Fission and fusion reactor technologies have been investigated since 1950's on the world. For reactor technology, fission and fusion reaction investigations are play important role for improve new generation technologies. Especially, neutron reaction studies have an important place in the development of nuclear materials. So neutron effects on materials should study as theoretically and experimentally for improve reactor design. For this reason, Nuclear reaction codes are very useful tools when experimental data are unavailable. For such circumstances scientists created many nuclear reaction codes such as ALICE/ASH, CEM95, PCROSS, TALYS, GEANT, FLUKA. In this study we used ALICE/ASH, PCROSS and CEM95 codes for energy spectrum calculation of outgoing particles from Pb bombardment by neutron. While Weisskopf-Ewing model has been used for the equilibrium process in the calculations, full exciton, hybrid and geometry dependent hybrid nuclear reaction models have been used for the pre-equilibrium process. The calculated results have been discussed and compared with the experimental data taken from EXFOR.

  3. Canopy Level Chlorophyll Fluorescence and the PRI in a Cornfield

    Science.gov (United States)

    Middleton, Elizabeth M.; Cheng, Yen-Ben; Corp, Lawrence A.; Campbell, Petya K. E.; Huemmrich, K. Fred; Zhang, Qingyuan; Kustas, William P.

    2012-01-01

    Two bio-indicators, the Photochemical Reflectance Index (PRI) and solar-induced red and far-red Chlorophyll Fluorescence (SIF), were derived from directional hyperspectral observations and studied in a cornfield on two contrasting days in the growing season. Both red and far-red SIF exhibited higher values on the day when the canopy in the early senescent stage, but only the far-red SIF showed sensitivity to viewing geometry. Consequently, the red/far-red SIF ratio varied greatly among azimuth positions while the largest values were obtained for the "hotspot" at both growth stages. This ratio was lower (approx.0.88 +/- 0.4) in early July than in August when the ratio approached equivalence (near approx.1). In concert, the PRI exhibited stronger responses to both zenith and azimuth angles and different values on the two growth stages. The potential of using these indices to monitor photosynthetic activities needs further investigation

  4. Sistem DACUM pri sestavljanju strokovnih izobraževalnih programov

    Directory of Open Access Journals (Sweden)

    Jindra Kulich

    1996-12-01

    Full Text Available DACUM je razmeroma nov sistem logično razvrščenih postopnih korakov, ki jih je mogoče uporabiti za večjo učinkovitost pri strokovnem izobraževanju delavcev. Sistem DACUM je sestavljen iz petih zaporednih korakov. Prva dva obsegala analizo delovnih nalog in določanje storilnostnih ciljev. Pri naslednjih treh korakih mentor določi izpeljavo izobraževanja, izbira postopek vrednotenja, učne metode in izobraževalna sredstva. Izobraževalni program sestavljajo sploš­ ne naloge, delne naloge in posamezne naloge. Glede na te tri ravni je kot primer razčlenjeno usposabljanje natakarja.

  5. PSIHOLOŠKI VIDIKI BARV PRI IZDELAVI LOGOTIPA

    OpenAIRE

    Bauman, Anja

    2015-01-01

    Osrednja tema diplomske naloge so psihološki vidiki barv pri izdelavi logotipa. Diplomska naloga zajema tako teoretični kot tudi empirični del. V teoretičnem delu je predstavljen logotip in njegovi kriteriji uspešnosti. Prav tako pa so predstavljene tudi barve, njeni učinki ter značilnosti. Empirični del diplomske naloge pa se ukvarja z analizo obstoječih in izdelanih logotipov.

  6. Donava in Sava pri Strabonu in v napisih

    Directory of Open Access Journals (Sweden)

    Marjeta Šašel Kos

    2010-12-01

    Full Text Available V članku so zbrana in komentirana tista mesta v Strabonovi 7. knjigi, kjer piše o Donavi in Savi. Že Herodot je Donavo opredelil kot najpomembnejšo njemu znano reko; pri grških piscih se je zanjo uveljavilo tračansko ime Istros, ki se je tudi pozneje uporabljalo za spodnji tok Donave. Zgornji tok se je imenoval Danuvius/Danubius, ime je verjetno keltsko. Kot božanstvu so Danuviju postavljali oltarje; blizu sotočja Drave in Donave so skupaj z njim počastili tudi boga Drava. Savo je poosebljal bog Savus, ki so ga častili ob zgornjem, nevarnejšem toku reke do Siscije. Skupaj z Adsaluto sta imela svetišče nad brzicami pri Podkraju nasproti Hrastnika, blizu območja nevarnih slapov. Strabon poleg drugih rek dvakrat omenja sicer neznani Noar, ki so ga enačili s celo vrsto rek, med drugim tudi z Odro, vendar je natančna analiza Strabonovega besedila pokazala, da gre lahko le za spodnji tok Save. Izviri Save Dolinke v Zelencih pri Podkorenu so bili sveti kraj, kjer so častili Saverkno.

  7. SODOBNE REŠITVE PRI UPORABI NAKUPOVALNIH VREČK

    OpenAIRE

    Zupanc, Simona

    2016-01-01

    Diplomska naloga opisuje velik problem sodobne družbe - prenasičenost z odpadnimi plastičnimi vrečkami, ki zelo obremenjujejo okolje in potrebujejo izjemno veliko časa za razgradnjo. Naloga se ukvarja tudi z možnimi alternativnimi rešitvami za to pereče vprašanje. V prvem poglavju je predstavljena problematika plastične embalaže. Pri tem smo se predvsem osredotočili na problem plastičnih vrečk HDPE (polietilen visoke gostote- vrečke, katere se uporabljajo za sadje, zelenjavo in mesne izde...

  8. POMEN MEDNARODNE OBDAVČITVE PRI POSAMZNIH VRSTAH DOHODKOV

    OpenAIRE

    Lipovčić, Dijana

    2013-01-01

    Med dohodke iz kapitala spadajo obresti, dividende in dobiček iz kapitala. Države svoje rezidente obdavčujejo po načelu svetovnega dohodka, nerezidente pa glede na vir dohodka. Problem pri mednarodni obdavčitvi je možnost dvojnega obdavčevanja, saj je lahko davčni zavezanec obdavčen v tujini, kjer je dohodek dosegel, in tudi v državi rezidentstva. Države zato sklepajo sporazume o izogibanju dvojnega obdavčevanja. V diplomskem seminarju smo primerjali obdavčitev dohodkov iz kapitala v Slo...

  9. PREPOZNAVNOST PLESNEGA LJUDSKEGA IZROČILA PRI OSNOVNOŠOLCIH

    OpenAIRE

    Žižek, Tamara

    2016-01-01

    Diplomsko delo z naslovom Prepoznavnost plesnega ljudskega izročila pri osnovnošolcih sestavljata teoretični in empirični del. V teoretičnem delu smo predstavili ples na splošno ter ljudski ples, osredotočili smo se bolj podrobno na en slovenski ljudski ples, ki se imenuje štajeriš. Predstavili smo tudi poučevanje ljudskih plesov, kaj je pomembno za vodenje folklorne skupine, opisali oblačila, ki se imenujejo narodne noše, ter na kratko predstavili nekaj izbranih šeg in navad naših prednikov...

  10. Three causes of variation in the photochemical reflectance index (PRI) in evergreen conifers.

    Science.gov (United States)

    Wong, Christopher Y S; Gamon, John A

    2015-04-01

    The photochemical reflectance index (PRI) reflects diurnal xanthophyll cycle activity and is also influenced by seasonally changing carotenoid : Chl pigment ratios. Both changing pigment pools and xanthophyll cycle activity contribute to photoprotection in evergreen conifers exposed to boreal winters, but they operate over different timescales, and their relative contribution to the PRI signal has often been unclear. To clarify these responses and their contribution to the PRI signal, leaf PRI, pigment composition, temperature and irradiance were monitored over 2 yr for two evergreen conifers (Pinus contorta and Pinus ponderosa) in a boreal climate. PRI was affected by three distinct processes operating over different timescales and exhibiting contrasting spectral responses. Over the 2 yr study period, the greatest change in PRI resulted from seasonally changing carotenoid : Chl pigment ratios, followed by a previously unreported shifting leaf albedo during periods of deep cold. Remarkably, the smallest change was attributable to the xanthophyll cycle. To properly distinguish these three effects, interpretation of PRI must consider temporal context, physiological responses to evolving environmental conditions, and spectral response. Consideration of the separate mechanisms affecting PRI over different timescales could greatly improve efforts to monitor changing photosynthetic activity using optical remote sensing. © 2014 The Authors New Phytologist © 2014 New Phytologist Trust.

  11. 'Mastspuit met sensoren brengt middel effectiever aan' (onderzoek praktijkproeven PRI en PPO)

    NARCIS (Netherlands)

    Engels, A.; PPO BBF Boomkwekerij,; PRI,; Nieuwenhuizen, A.T.

    2011-01-01

    In mei 2011 starten Plant Research International (PRI), PPO Boomkwekerij en Damcon de eerste praktijkproeven met sensoren op de mastspuit. Dit prototype spuit alleen als het bladeren detecteert. Projectleider Ard Nieuwenhuizen van PRI is ervan overtuigd dat kwekers met zo'n type spuit middelen

  12. Draft Genome Sequence of the Antagonistic Rhizosphere Bacterium Serratia plymuthica Strain PRI-2C

    NARCIS (Netherlands)

    Garbeva, P.; van Elsas, J.D.; de Boer, W.

    Serratia plymuthica strain PRI-2C is a rhizosphere bacterial strain with antagonistic activity against different plant pathogens. Here we present the 5.39-Mb (G+C content, 55.67%) draft genome sequence of S. plymuthica strain PRI-2C with the aim of providing insight into the genomic basis of its

  13. Correcting the relationship between PRI and shadow fraction for the blue sky effect

    Science.gov (United States)

    Mõttus, Matti

    2016-04-01

    The Photochemical Reflectance Index (PRI) is defined as the normalized difference ratio of leaf reflectance at two specific wavelengths in the green spectral region. Its value depends on the status of leaf carotenoid content, and especially that of the xanthophyll cycle pigments. Due to the dependence on the xanthophyll cycle, when the photosynthetic apparatus of green leaves is close to the saturation limit, their PRI becomes dependent on light conditions. Therefore, by measuring the PRI of leaves in the same canopy under different local irradiance conditions on a sunny day, it should be possible to determine the saturation level of the leaves. In turn, this gives information on the light use efficiency (LUE) of the vegetation canopy. The average light conditions of visible foliage elements are often quantified with the shadow fraction -- the fraction of visible foliage not lit by direct sunlight. The dependence of PRI on the shadow fraction has been used to remotely measure canopy LUE on clear days. Variations in shadow fraction have been achieved with multiangular measurement. However, besides photosynthetic downregulation, the dependence of canopy PRI on shadow fraction is affected by the blue sky radiation caused by scattering in the atmosphere. To quantify this effect on remotely sensed PRI, we present the underlying definitions relating leaf and canopy PRI and perform the required calculations for typical midsummer conditions in Central Finland. We demonstrate that the effect of blue sky radiation on the variation of PRI with canopy shadow fraction is similar in shape and magnitude to that of LUE variations reported in literature. Next, we propose a new method to assess these PRI variations in structured vegetation. We investiagate this blue sky effect on the PRI -- shadow fraction relationship with high spatial (60 cm) and spectral (9.8 nm) resolution airborne imaging spectroscopy data from Hyytiälä, Finland. We evaluate the spectral irradiance in

  14. Prednosti metode Montessori pri obravnavi oseb z demenco

    Directory of Open Access Journals (Sweden)

    Andreja Ljubič

    2017-03-01

    Full Text Available Uvod: Demenca je kronično obolenje s tendenco upadanja kognitivnih sposobnosti obolelega. Uporaba metod za obvladovanje in trening osnovnih življenjskih aktivnosti, ki omogočajo daljše obdobje samostojnega življenja pacienta z demenco, je v tujini uveljavljena z različnimi novejšimi koomplementarnimi pristopi. Ena izmed uveljavljenih metod je pristop Marie Montessori, prilagojen odraslim pacientom z demenco. V članku je predstavljena metoda montessori pri obravnavi pacienta z demenco in njeni učinki na kakovost življenja pacienta z demenco. Metode: Uporabljena je bila deskriptivna raziskovalna metodologija s pregledom domače in tuje literature. Za prikaz pregleda petih preko spleta dostopnih podatkovnih baz in odločanja o uporabnosti pregledanih virov je bila uporabljena metoda PRISMA. V končni pregled literature je bilo ključenih 19 člankov, objavljenih do maja 2016. Za obdelavo podatkov je bil uporabljen model analize konceptov. Večina zajetih raziskav je bila izvedena v Združenih državah Amerike. Rezultati: Po pregledu raziskav so bila identificirana tri tematska področja: (1 vpliv metode montessori na sodelovanje in prizadevanje, (2 vpliv metode montessori na vedenje, povezano s hranjenjem, in (3 vpliv metode montessori na širšo skupino kognitivnih sposobnosti. Diskusija in zaključek: Kljub majhnemu številu člankov, ki opisujejo uporabo metode montessori pri obravnavi pacientov z demenco, metodo lahko predstavimo kot učinkovito. Avtorji raziskav ugotavljajo, da pristop ne le omogoča ohranjanje kognitivnih sposobnosti, temveč le-te celo izboljšuje.

  15. Pomen zdrave prehrane in telesne aktivnosti pri osnovnošolcih

    OpenAIRE

    Smole, Valentina

    2014-01-01

    V diplomskem delu Pomen zdrave prehrane in telesne aktivnosti pri osnovnošolcih so predstavljene smernice zdravega prehranjevanja pri otrocih, pomen zdrave prehrane in redne telesne aktivnosti za zdravje osnovnošolskih otrok ter vloga medicinske sestre pri promociji zdrave prehrane in telesne aktivnosti. V empiričnem delu so predstavljeni rezultati raziskave, ki smo jo izvedli med otroci osmega in devetega razreda osnovne šole. Namen raziskave je bil ugotoviti, kakšen je odnos osnovnošolcev d...

  16. Uporaba kreativnih medijev pri delu z mladimi v družbi tveganja

    OpenAIRE

    Zaner, Tamara

    2017-01-01

    Kot socialni pedagogi in pedagoginje se pri svojem delu nenehno srečujemo z mladimi. Ti se v sodobni družbi, srečujejo z negotovostjo, dvomi in posledično tudi stiskami, ki segajo v vse dimenzije njihovega življenja. Pri svojem delu sem temeljila na Beckovem pojmovanju današnje družbe, pri razumevanju položaja mladih pa izhajala iz koncepta življenjske usmerjenosti, socialnega pedagoga Hansa Thierscha. Namen raziskovalnega dela je preveriti, kako s pomočjo kreativnih medijev prispevati k opol...

  17. Structural and functional characterization of the CAP domain of pathogen-related yeast 1 (Pry1) protein

    Science.gov (United States)

    Darwiche, Rabih; Kelleher, Alan; Hudspeth, Elissa M.; Schneiter, Roger; Asojo, Oluwatoyin A.

    2016-06-01

    The production, crystal structure, and functional characterization of the C-terminal cysteine-rich secretory protein/antigen 5/pathogenesis related-1 (CAP) domain of pathogen-related yeast protein-1 (Pry1) from Saccharomyces cerevisiae is presented. The CAP domain of Pry1 (Pry1CAP) is functional in vivo as its expression restores cholesterol export to yeast mutants lacking endogenous Pry1 and Pry2. Recombinant Pry1CAP forms dimers in solution, is sufficient for in vitro cholesterol binding, and has comparable binding properties as full-length Pry1. Two crystal structures of Pry1CAP are reported, one with Mg2+ coordinated to the conserved CAP tetrad (His208, Glu215, Glu233 and His250) in spacegroup I41 and the other without divalent cations in spacegroup P6122. The latter structure contains four 1,4-dioxane molecules from the crystallization solution, one of which sits in the cholesterol binding site. Both structures reveal that the divalent cation and cholesterol binding sites are connected upon dimerization, providing a structural basis for the observed Mg2+-dependent sterol binding by Pry1.

  18. Spectral Similarity and PRI Variations for a Boreal Forest Stand Using Multi-angular Airborne Imagery

    Directory of Open Access Journals (Sweden)

    Vincent Markiet

    2017-09-01

    Full Text Available The photochemical reflectance index (PRI is a proxy for light use efficiency (LUE, and is used in remote sensing to measure plant stress and photosynthetic downregulation in plant canopies. It is known to depend on local light conditions within a canopy indicating non-photosynthetic quenching of incident radiation. Additionally, when measured from a distance, canopy PRI depends on shadow fraction—the fraction of shaded foliage in the instantaneous field of view of the sensor—due to observation geometry. Our aim is to quantify the extent to which sunlit fraction alone can describe variations in PRI so that it would be possible to correct for its variation and identify other possible factors affecting the PRI–sunlit fraction relationship. We used a high spatial and spectral resolution Aisa Eagle airborne imaging spectrometer above a boreal Scots pine site in Finland (Hyytiälä forest research station, 61°50′N, 24°17′E, with the sensor looking in nadir and tilted (off-nadir directions. The spectral resolution of the data was 4.6 nm, and the spatial resolution was 0.6 m. We compared the PRI for three different scatter angles ( β = 19 ° , 55 ° and 76 °, defined as the angle between sensor and solar directions at the forest stand level, and observed a small (0.006 but statistically significant (p < 0.01 difference in stand PRI. We found that stand mean PRI was not a direct function of sunlit fraction. However, for each scatter angle separately, we found a clear non-linear relationship between PRI and sunlit fraction. The relationship was systematic and had a similar shape for all of the scatter angles. As the PRI–sunlit fraction curves for the different scatter angles were shifted with respect to each other, no universal curve could be found causing the observed independence of canopy PRI from the average sunlit fraction of each view direction. We found the shifts of the curves to be related to a leaf structural effect on canopy

  19. Diurnal and Directional Responses of Chlorophyll Fluorescence and the PRI in a Cornfield

    Science.gov (United States)

    Middleton, Elizabeth; Cheng, Y. B.; Corp, L.; Campbell, P.; Kustas, W.

    2010-01-01

    Determining the health and vigor of vegetation using high spectral resolution remote sensing is an important goal which has application to monitoring agriculture and ecosystem productivity and carbon exchange. Two spectral indices used to assess whether vegetation is performing near-optimally or exhibiting symptoms of environmental stress (e.g., drought or nutrient deficiency, non-optimal temperatures, etc.) are the Photochemical Reflectance Index (PRI) and solar-induced red and far-red Chlorophyll Fluorescence (Fs). Both the PRI and Fs capture the dynamics of photoprotection mechanisms within green foliage: the PRI is based on the association of the reflected radiation in the green spectrum with the xanthophyll cycle, whereas Fs measures the emitted radiation in the red and far-red spectrum. Fs was determined from retrievals in the atmospheric oxygen absorption features centered at 688 and 760 nm using a modified Fraunhofer Line Depth (FLD) method. We previously demonstrated diurnal and seasonal PRI differences for sunlit vs. shaded foliage in a conifer forest canopy, as expressed in the hotspot and darkspot of the Bidirectional Reflectance Function (BRF). In a USDA-ARS experimental field site located in Beltsville, MD, USA, measurements were acquired over a corn crop from a nadir view in 2008 with an ASD FieldSpec Pro (Analytical Spectral Devices, Inc., Boulder, CO, USA) to study the behavior of the PRI for sunlit and shaded foliage as captured in reflectance variations associated with the BRF, in a I m tall canopy in the vegetative growth stage. Those observations were compared to simulations obtained from two radiative transfer models. Measurements were then acquired to examine whether the PRI and Fs were influenced by view zenith and azimuth geometries at different times of day. Those measurements were made in 2010 with the Ocean Optics USB4000 Miniature Fiber Optic Spectrometer (Ocean Optics Inc., Dunedin, Florida, USA) at several times during the day on

  20. Mass spectrometric investigation of neutral and charged constituents in saturated vapor over PrI3

    International Nuclear Information System (INIS)

    Motalov, V.B.; Vorobiev, D.E.; Kudin, L.S.; Markus, T.

    2009-01-01

    The Knudsen effusion mass spectrometric technique was used to study vapor species over praseodymium triiodide. The monomer, PrI 3 , and dimer, Pr 2 I 6 , molecules and the negative ions, PrI 4 - and Pr 2 I 7 - , were observed in saturated vapor in the temperature range from 856 K to 1048 K. The partial vapor pressures of neutral constituents were determined and the enthalpies of sublimation obtained using the second and the third laws of thermodynamics (Δ s H deg. (298.15 K) = 291 ± 4 kJ mol -1 for PrI 3 , and Δ s H deg. (298.15 K) = 400 ± 30 kJ mol -1 for Pr 2 I 6 ). The equilibrium constants for various ion molecular reactions were measured and the enthalpies of reactions obtained. The enthalpies of formation, Δ f H deg. (298.15 K) kJ mol -1 , of gaseous molecules and ions were calculated and are as follows: -374 ± 6 (PrI 3 ), -929 ± 30 (Pr 2 I 6 ), -867 ± 30 (PrI 4 - ), -1432 ± 50 (Pr 2 I 7 - )

  1. Physiological validation of photochemical reflectance index (PRI) as a photosynthetic parameter using Arabidopsis thaliana mutants.

    Science.gov (United States)

    Kohzuma, Kaori; Hikosaka, Kouki

    2018-03-25

    Non-photochemical quenching (NPQ) is the most important photoprotective system in higher plants. NPQ can be divided into several steps according to the timescale of relaxation of chlorophyll fluorescence after reaching a steady state (i.e., the fast phase, qE; middle phase, qZ or qT; and slow phase, qI). The dissipation of excess energy as heat during the xanthophyll cycle, a large component of NPQ, is detectable during the fast to middle phase (sec to min). Although thermal dissipation is primarily investigated using indirect methods such as chlorophyll a fluorescence measurements, such analyses require dark adaptation or the application of a saturating pulse during measurement, making it difficult to continuously monitor this process. Here, we designed an unconventional technique for real-time monitoring of changes in thylakoid lumen pH (as reflected by changes in xanthophyll pigment content) based on the photochemical reflectance index (PRI), which we estimated by measuring light-driven leaf reflectance at 531 nm. We analyzed two Arabidopsis thaliana mutants, npq1 (unable to convert violaxanthin to zeaxanthin due to inhibited violaxanthin de-epoxidase [VDE] activity) and npq4 (lacking PsbS protein), to uncover the regulator of the PRI. The PRI was variable in wild-type and npq4 plants, but not in npq1, indicating that the PRI is related to xanthophyll cycle-dependent thermal energy quenching (qZ) rather than the linear electron transport rate or NPQ. In situ lumen pH substitution using a pH-controlled buffer solution caused a shift in PRI. These results suggest that the PRI reflects only xanthophyll cycle conversion and is therefore a useful parameter for monitoring thylakoid lumen pH (reflecting VDE activity) in vivo. Copyright © 2018 The Authors. Published by Elsevier Inc. All rights reserved.

  2. PriFi - Using a Multiple Alignment of Related Sequences to Find Primers for  Amplification of Homologs

    DEFF Research Database (Denmark)

    Fredslund, Jakob; Schauser, Leif; Madsen, Lene Heegaard

    2005-01-01

    Using a comparative approach, the web program PriFi (http://cgi-www.daimi.au.dk/cgi-chili/PriFi/main) designs pairs of primers useful for PCR amplification of genomic DNA in species where prior sequence information is not available. The program works with an alignment of DNA sequences from phylog...

  3. Stres pri delu v nujni medicinski pomoči - prehospitalna enota

    OpenAIRE

    Ploder, Matej

    2013-01-01

    Izhodišča: V diplomskem delu smo se lotili vprašanja, kako stres vpliva na delo reševalcev v prehospitalni enoti nujne medicinske pomoči. Reševalci in zdravniki nujne medicinske pomoči se vsakodnevno srečujejo s situacijami, ki vplivajo na njihovo nadaljnjo delo, počutje in psihično stabilnost, predvsem pa na njihovo zdravje, od tragičnih nesreč, katerim so priča, do trenutkov, ko svojega poslanstva ne bi zamenjali za nič na svetu. Pri raziskavi smo ugotavljali, kaj reševalcem sploh predstavl...

  4. Analiza igre branilcev v conski obrambi 5:1 pri rokometu

    OpenAIRE

    Kozole, Rok

    2017-01-01

    V diplomski nalogi je predstavljena analiza igre branilcev v conski obrambi 5:1 pri rokometu. Obrambna formacija 5:1 je po obrambi 6:0 druga najpogosteje uporabljena obrambna formacija, katere se poslužujejo tako ekipe iz vrhunskega rokometa kot tudi ekipe, ki tekmujejo v ligah nižje kakovosti. V skladu s hitrim razvojem rokometne igre se je razvijala tudi obramba 5:1. Obrambna formacija 5:1 se pri mlajših rokometaših uporablja tudi kot prehodna obramba oz. temelj za prehod iz bolj globokih (...

  5. VPLIV LIKOVNE TEHNIKE NA IZBIRO BARV PRI PREDŠOLSKEM OTROKU

    OpenAIRE

    Marčec, Tamara

    2013-01-01

    Diplomsko delo z naslovom Vpliv likovne tehnike na izbiro barv pri predšolskem otroku je sestavljeno iz teoretičnega in praktičnega dela. V teoretičnem delu smo na kratko predstavili ustvarjalnost, njene faze in faktorje ter kako spodbujamo ali zaviramo ustvarjalnost pri predšolskem otroku. Nato smo nadaljevali in opisali vlogo in pomen barve za predšolskega otroka. Predstavili smo likovna področja in vsako na kratko opisali. Kasneje smo podrobneje opisali področje slikanja, kajti naše de...

  6. Regulation of pri-microRNA BIC transcription and processing in Burkitt lymphoma

    NARCIS (Netherlands)

    Kluiver, J.; van den Berg, Anke; de Jong, Doetje; Blokzijl, T.; Harms, G.; Bouwman, E.; Jacobs, Susan; Poppema, Sibrand; Kroesen, Bart-Jan

    2007-01-01

    BIC is a primary microRNA (pri-miR-155) that can be processed to mature miR-155. In this study, we show the crucial involvement of protein kinase C (PKC) and nuclear factor-kappa B (NF-kappa B) in the regulation of BIC expression upon B-cell receptor triggering. Surprisingly, Northern blot analysis

  7. PRI leidt rupsen om de tuin: effect van tussenteelt en combinatieteelt op rupsen op spruitkool

    NARCIS (Netherlands)

    Elderson, J.; Belder, den E.

    2002-01-01

    PRI onderzocht in spruitkool het effect van bloemstroken met bruine mosterd of klaver, ingezaaid om de zes rijen, op de aantallen rupsen en de samenstelling van de rupsenpopulatie gedurende het groeiseizoen. In het artikel ook een beschrijving en illustraties van de zes belangrijkste rupsensoorten

  8. Photosynthetic Efficiency of Northern Forest Ecosystems Using a MODIS-Derived Photochemical Reflectance Index (PRI)

    Science.gov (United States)

    Middleton, E. M.; Huemmrich, K. F.; Landis, D. R.; Black, T. A.; Barr, A. G.; McCaughey, J. H.

    2016-01-01

    This study evaluates a direct remote sensing approach from space for the determination of ecosystem photosynthetic light use efficiency (LUE), through measurement of vegetation reflectance changes expressed with the Photochemical Reflectance Index (PRI). The PRI is a normalized difference index based on spectral changes at a physiologically active wavelength (approximately 531 nanometers) as compared to a reference waveband, and is only available from a very few satellites. These include the two Moderate-Resolution Imaging Spectroradiometers (MODIS) on the Aqua and Terra satellites each of which have a narrow (10-nanometer) ocean band centered at 531 nanometers. We examined several PRI variations computed with candidate reference bands, since MODIS lacks the traditional 570-nanometer reference band. The PRI computed using MODIS land band 1 (620-670 nanometers) gave the best performance for daily LUE estimation. Through rigorous statistical analyses over a large image collection (n equals 420), the success of relating in situ daily tower-derived LUE to MODIS observations for northern forests was strongly influenced by satellite viewing geometry. LUE was calculated from CO2 fluxes (moles per moles of carbon absorbed quanta) measured at instrumented Canadian Carbon Program flux towers in four Canadian forests: a mature fir site in British Columbia, mature aspen and black spruce sites in Saskatchewan, and a mixed deciduous/coniferous forest site in Ontario. All aspects of the viewing geometry had significant effects on the MODIS-PRI, including the view zenith angle (VZA), the view azimuth angle, and the displacement of the view azimuth relative to the solar principal plane, in addition to illumination related variables.Nevertheless, we show that forward scatter sector views (VZA, 16 degrees-45 degrees) provided the strongest relationships to daily LUE, especially those collected in the early afternoon by Aqua (r squared = 0.83, RMSE (root mean square error) equals 0

  9. Dimeric structure of the N-terminal domain of PriB protein from Thermoanaerobacter tengcongensis solved ab initio

    Energy Technology Data Exchange (ETDEWEB)

    Liebschner, Dorothee [National Cancer Institute, Argonne National Laboratory, Argonne, IL 60439 (United States); Brzezinski, Krzysztof [National Cancer Institute, Argonne National Laboratory, Argonne, IL 60439 (United States); University of Bialystok, 15-399 Bialystok (Poland); Dauter, Miroslawa [Argonne National Laboratory, Argonne, IL 60439 (United States); Dauter, Zbigniew, E-mail: dauter@anl.gov [National Cancer Institute, Argonne National Laboratory, Argonne, IL 60439 (United States); Nowak, Marta; Kur, Józef; Olszewski, Marcin, E-mail: dauter@anl.gov [Gdansk University of Technology, 80-952 Gdansk (Poland); National Cancer Institute, Argonne National Laboratory, Argonne, IL 60439 (United States)

    2012-12-01

    The N-terminal domain of the PriB protein from the thermophilic bacterium T. tengcongensis (TtePriB) was expressed and its crystal structure has been solved at the atomic resolution of 1.09 Å by direct methods. PriB is one of the components of the bacterial primosome, which catalyzes the reactivation of stalled replication forks at sites of DNA damage. The N-terminal domain of the PriB protein from the thermophilic bacterium Thermoanaerobacter tengcongensis (TtePriB) was expressed and its crystal structure was solved at the atomic resolution of 1.09 Å by direct methods. The protein chain, which encompasses the first 104 residues of the full 220-residue protein, adopts the characteristic oligonucleotide/oligosaccharide-binding (OB) structure consisting of a five-stranded β-barrel filled with hydrophobic residues and equipped with four loops extending from the barrel. In the crystal two protomers dimerize, forming a six-stranded antiparallel β-sheet. The structure of the N-terminal OB domain of T. tengcongensis shows significant differences compared with mesophile PriBs. While in all other known structures of PriB a dimer is formed by two identical OB domains in separate chains, TtePriB contains two consecutive OB domains in one chain. However, sequence comparison of both the N-terminal and the C-terminal domains of TtePriB suggests that they have analogous structures and that the natural protein possesses a structure similar to a dimer of two N-terminal domains.

  10. Uporaba e-gradiv pri pouku računalništva v osnovni šoli

    OpenAIRE

    Benedičič, Andrej

    2015-01-01

    V zadnjih nekaj letih se je pouk v osnovnih in srednjih šolah pri nas in po svetu močno spremenil, k čemur je pripomogel tudi razvoj informacijsko-komunikacijske tehnologije (v nadaljevanju IKT). Dandanes si pouka brez uporabe IKT pri vseh učnih predmetih skoraj ne moremo več predstavljati. V šole so tako prišle elektronske table, interaktivne table, tablice, glasovalne naprave in ostale elektronske naprave, ki lahko ob ustrezni uporabi pripomorejo k večji aktivnosti učencev med poukom in izb...

  11. Search for 1/sup +/ states in /sup 208/Pb by /sup 208/Pb(p, p') and the /sup 209/Bi(d, /sup 3/He) reactions

    Energy Technology Data Exchange (ETDEWEB)

    Ikegami, H.; Yamazaki, T.; Morinobu, S.; Katayama, I.; Fujiwara, M. [Osaka Univ., Suita (Japan). Research Center for Nuclear Physics; Ikegami, Hidetsugu; Muraoka, Mitsuo [eds.; Osaka Univ., Suita (Japan). Research Center for Nuclear Physics

    1980-01-01

    Proton inelastic scattering experiment on Pb-208 was carried out by using 65 MeV protons from a 230 cm AVF cyclotron, to study the 1/sup +/ states in Pb-208. The momentum of outgoing protons was analyzed by the magnetic spectrograph RAIDEN. The 7.06 MeV state was very weakly excited. In order to identify 1/sup +/ states from the angular distributions of the inelastic scattering, the proton spectra scattered from the well known 1/sup +/ state in Pb-206 were measured. because of masking by a strong neighbouring peak, the differential cross section of the 1/sup +/ state was measured only at two points. The comparison between the experiment and distorted wave calculation for the 1/sup +/ state (1.703 MeV) in Pb-206 was made, and the results implied that the 1/sup +/ states in Pb-208 would also be weakly excited even if these states are good particle-hole states, Next, Bi-209 (d, He-3) reaction experiment was performed. The comparison between the preliminary results and the calculated results based on the shell model is shown in a figure. The overall agreement between the experimental and theoretical results seems to be good. However, the existence of the 1/sup +/ state has not been confirmed, and will be confirmed in the next step to be done.

  12. Remote detection of water stress conditions via a diurnal photochemical reflectance index (PRI) improves yield prediction in rainfed wheat

    Science.gov (United States)

    Magney, T. S.; Vierling, L. A.; Eitel, J.

    2014-12-01

    Employing remotely sensed techniques to quantify the existence and magnitude of midday photosynthetic downregulation using the photochemical reflectance index (PRI) may reveal new information about plant responses to abiotic stressors in space and time. However, the interpretation and application of the PRI can be confounded because of its sensitivity to several variables changing at the diurnal (e.g., irradiation, shadow fraction) and seasonal (e.g., leaf area, chlorophyll and carotene pigment concentrations, irradiation) time scales. We explored different techniques to correct the PRI for variations in canopy structure and relative chlorophyll content (ChlR) using highly temporally resolved (frequency = five minutes) in-situ radiometric measurements of PRI and the Normalized Difference Vegetation Index (NDVI) over eight soft white spring wheat (Triticum aestivum L.)field plots under varying nitrogen and soil water conditions over two seasons. Our results suggest that the influence of seasonal variation in canopy ChlR and LAI on the diurnally measured PRI (PRIdiurnal) can be minimized using simple correction techniques, therefore improving the strength of PRI as a tool to quantify abiotic stressors such as daily changes in soil volumetric water content (SVWC), and vapor pressure deficit (VPD). PRIdiurnal responded strongly to available nitrogen, and linearly tracked seasonal changes in SVWC, VPD, and stomatal conductance (gc). Utilizing the PRI as an indicator of stress, yield predictions significantly over greenness indices such as the NDVI. This study provides insight towards the future interpretation and scaling of PRI to quantify rapid changes in photosynthesis, and as an indicator of plant stress.

  13. PriFi - Using a Multiple Alignment of Related Sequences to Find Primers for  Amplification of Homologs

    DEFF Research Database (Denmark)

    Fredslund, Jakob; Schauser, Leif; Madsen, Lene Heegaard

    2005-01-01

    Using a comparative approach, the web program PriFi (http://cgi-www.daimi.au.dk/cgi-chili/PriFi/main) designs pairs of primers useful for PCR amplification of genomic DNA in species where prior sequence information is not available. The program works with an alignment of DNA sequences from...... of a procedure for developing general markers serving as common anchor loci across species. To accommodate users with special preferences, configuration settings and criteria can be customized....

  14. Načrtovani preventivni hišni obisk pri nosečnici

    OpenAIRE

    Hofinger Mihelič, Špela

    2009-01-01

    Rojstvo zdravega otroka je nedvomno eden izmed najpomembnejših dogodkov v življenju posameznika in družine. Namen diplomske naloge je bil ugotoviti v kolikšni meri se pri nosečnicah vključuje v preventivo patronažna medicinska sestra (PMS) in kaj nosečnice pričakujejo od njenega hišnega obiska. Cilj je bil oceniti želje nosečnic po hišnem obisku PMS in ugotoviti kje dobijo nosečnice največ informacij o nosečnosti in zdravem načinu življenja ter ugotoviti koliko so nosečnice poučene o pravicah...

  15. La mort d’un couple : prière(s) et vie publiques

    OpenAIRE

    Touzeil-Divina, Mathieu

    2009-01-01

    Si, avant la Loi du 5 décembre 1905, les Eglises et l’Etat concrétisaient matériellement leurs liens étroits par des rites officiels nommés prières publiques, ceux-ci sont censés avoir été supprimés depuis. C’est l’histoire de cette suppression (après en avoir retenu une définition) qui est ici envisagée à travers trois secteurs cardinaux de l’action administrative : la vie universitaire, parlementaire et judiciaire. Dans ces trois hypothèses les prières publiques ont été supprimées de façon ...

  16. VLOGA OPERATIVNEGA MANAGEMENTA PRI RAZVOJU UNICREDIT BANKE SLOVENIJE D.D.

    OpenAIRE

    Horvat, Metod

    2010-01-01

    Diplomsko delo predstavlja vlogo operativnega managementa pri razvoju Unicredit Banka Slovenije d.d. Operativni management predstavlja ključen kader, ki s svojim znanjem, sposobnostjo in pripravljenostjo lahko pripelje do realizacije ciljev in razvoja banke. V teoretičnem delu gre za pregled strokovne literature na področju organizacije, managerja, managementa, operativnega managementa, operativnega managementa v Unicredit Banki Slovenije d.d. V empiričnem delu je predstavljena raziskav...

  17. SOCIAL PRACTICE PERFORMED BY BALINESE SCULPTORS IN DISTRICTS OF UBUD AND SUKAWATI TO PRY INTO THE LAW OF PHORNOGRAPHY

    Directory of Open Access Journals (Sweden)

    I Ketut Sudita

    2013-02-01

    Full Text Available Balinese sculptors in districts of Ubud and Sukawati, Gianyar, Bali pry into the Law of Pornography. Those who agree state that the law is needed to maintain the morality which has been getting worse, and those who disagree state that it may emasculate their freedom and creativities. This study gives answers to (1 what social practices were performed by the Balinese sculptors to pry into the Law of Pornography?, (2 why did they pry into the application of the law?, and (3 what was the meaning of their prying? Several relevant critical theories such as the theory of structuration, the theory of hegemony, and the theory of aesthetics were eclectically used in this study. The data needed were collected through observation, in-depth interview, documentation study, and library research. The result of the study showed that the Balinese sculptors showed their resistance to the application of the law by making adaptation, changing profession, and still producing pornographic works. The sanction which might be imposed upon them, the consumers of pornographic works decreased, and they were eliminated from exhibitions scared them when they pried into the law. What they did could not be separated from economic, political, ideological, moral, and ethic factors. The meaning of their prying was that it caused them to lose their idealism, their consumers went down, and the number of pornographic works dropped as well.

  18. Photochemical Reflectance Index (PRI) as a proxy of Light Use Efficiency (LUE) and transpiration in Mediterranean crop sites

    Science.gov (United States)

    LE Dantec, V.; Chebbi, W.; Boulet, G.; Merlin, O.; Lili-Chabaane, Z.; Er Raki, S.; Ceschia, E.; Khabba, S.; Fanise, P.; Zawilski, B.; Simonneaux, V.; Jarlan, L.

    2016-12-01

    The Photochemical Reflectance Index (PRI) is based on the short term reversible xanthophyll pigment changes accompanying plant stress and therefore of the associated photosynthetic activities. Strong relationships between PRI and Light Use Efficiency (LUE) were shown at leaf and canopy scales and over a wide range of species (Garbulsky et al., 2011). But very few previous works have explored the potential link with plant water status. In this study, we have first analyzed the link between PRI and LUE at canopy scale on two different crops in terms of canopy structure and crop management: olive grove (Tunisia) and wheat grown under different water regimes (irrigated or rainfed) and climate zones (France, Morocco). We have investigated the daily and seasonal dynamics of PRI; linking its variations to meteorological factors (global radiation and sun angle effects, soil water content, relative air humidity …) and plant processes. The highest correlations were mainly observed in clear skies conditions. We have found, whatever site, linear negative relationships between PRI and LUE using data acquired in midday (i.e. in solar zenithal angle condition). Linear link between PRI and sapflow measurements was also revealed. This correlation was obtained over periods characterized by a moderate soil water deficit, i.e. by when transpiration rate was mainly control by Vapor Pressure Deficit. We will then briefly presented alternative and complementary approaches to this index, to detect different level of water stress using thermal infrared emissions.

  19. The Quantification Process for the PRiME-U34i

    International Nuclear Information System (INIS)

    Hwang, Mee-Jeong; Han, Sang-Hoon; Yang, Joon-Eon

    2006-01-01

    In this paper, we introduce the quantification process for the PRIME-U34i, which is the merged model of ETs (Event Trees) and FTs (Fault Trees) for the level 1 internal PSA of UCN 3 and 4. PRiME-U34i has one top event. Therefore, the quantification process is changed to a simplified method when compared to the past one. In the past, we used the text file called a user file to control the quantification process. However, this user file is so complicated that it is difficult for a non-expert to understand it. Moreover, in the past PSA, ET and FT were separated but in PRiMEU34i, ET and FT were merged together. Thus, the quantification process is different. This paper is composed of five sections. In section 2, we introduce the construction of the one top model. Section 3 shows the quantification process used in the PRiME-U34i. Section 4 describes the post processing. Last section is the conclusions

  20. Povezanost modulacije refleksa H pri prehodu iz leže v stojo in mejami stabilnosti v stoji pri baletnih plesalcih

    OpenAIRE

    Lešnik, Tjaša

    2017-01-01

    Da bi ugotovili povezanost modulacije refleksa H in mej stabilnosti pri baletnih plesalcih, smo izmerili amplitudo refleksa H in izvedli štirismerni test mej stabilnosti. Refleks H je bil izmerjen osmim profesionalnim baletnim plesalcem, aktivnim članom baletnega ansambla Slovenskega narodnega gledališča Ljubljana in Maribor (1 moški in 7 žensk, povprečna starost: 25±4,2 let, povprečna višina: 169,25±5,4 cm in povprečna teža: 56,45± 10,1 kg). Vsi merjenci so zaključili najmanj 10 let plesnega...

  1. Prion-like nanofibrils of small molecules (PriSM): A new frontier at the intersection of supramolecular chemistry and cell biology.

    Science.gov (United States)

    Zhou, Jie; Du, Xuewen; Xu, Bing

    2015-01-01

    Formed by non-covalent interactions and not defined at genetic level, the assemblies of small molecules in biology are complicated and less explored. A common morphology of the supramolecular assemblies of small molecules is nanofibrils, which coincidentally resembles the nanofibrils formed by proteins such as prions. So these supramolecular assemblies are termed as prion-like nanofibrils of small molecules (PriSM). Emerging evidence from several unrelated fields over the past decade implies the significance of PriSM in biology and medicine. This perspective aims to highlight some recent advances of the research on PriSM. This paper starts with description of the intriguing similarities between PriSM and prions, discusses the paradoxical features of PriSM, introduces the methods for elucidating the biological functions of PriSM, illustrates several examples of beneficial aspects of PriSM, and finishes with the promises and current challenges in the research of PriSM. We anticipate that the research of PriSM will contribute to the fundamental understanding at the intersection of supramolecular chemistry and cell biology and ultimately lead to a new paradigm of molecular (or supramolecular) therapeutics for biomedicine.

  2. Responses of the reflectance indices PRI and NDVI to experimental warming and drought in European shrublands along a north–south climatic gradient

    DEFF Research Database (Denmark)

    Mänd, Pille; Hallik, Lea; Peñuelas, Josep

    2010-01-01

    NDVI680 [780 nm; 680 nm] using red spectral region, and NDVI570 [780 nm; 570 nm] using the same green spectral region as PRI. All three reflectance indices were significantly related to green LAIe and were able to detect changes in shrubland vegetation among treatments. In general warming treatment...... increased PRI and drought treatment reduced NDVI values. The significant treatment effect on photochemical efficiency of plants detected with PRI could not be detected by fluorescence measurements. However, we found canopy level measured PRI to be very sensitive to soil reflectance properties especially...

  3. STRATEGIJA ZDRAVEGA ŽIVLJENJA PRI DELU V MERCATORJU D.D.

    OpenAIRE

    Črnila, Marija

    2009-01-01

    V prvem delu naloge je prikazan poklic prodajalca pri nas. Delo se osredotoči na zdravstvene izostanke z dela v Sloveniji. V tem kontekstu so predstavljena posamezna teoretična izhodišča. Nakazane so ločnice med zdravstvenimi izostanki z dela in delodajalci. V osrednjem delu naloge je predstavljena strategija za promocijo zdravja v delovnem okolju, možnosti za zniževanje bolniškega staleža, Luksemburška deklaracija. Osvetljeno je vprašanje dimenzij zdravega življenjskega sloga. Z delom ...

  4. IZRAŽANJE NEPRIJETNIH ČUSTEV PRI PREDŠOLSKIH OTROCIH

    OpenAIRE

    Kumer, Monika

    2012-01-01

    V diplomskem delu Izražanje neprijetnih čustev pri predšolskih otrocih so podrobneje predstavljena naslednja neprijetna čustva: jeza, strah, žalost, sram, ljubosumje, gnus. V teoretičnem delu sem najprej opredelila čustva kot del duševnih procesov, pojem čustva definirala glede na različne avtorje in različne teorije ter opisala osnovne značilnosti čustev. Navedla sem, kako lahko čustva med seboj razlikujemo (afekti in razpoloženja, osnovna in sestavljena čustva oz. temeljna in kompleksna ...

  5. KRMILJENJE MIKROKRMILNIŠKEGA MODULA ARDUINO IN NJEGOVA UPORABA PRI KOMUNIKACIJI Z OSTALIMI NAPRAVAMI

    OpenAIRE

    Ekart, Matej

    2012-01-01

    V diplomskem delu smo obravnavali mikrokrmilniški modul Arduino. Opisali smo strojno opremo modela Uno, ki ga uporabljamo v praktičnem delu, ter predstavili osnovne karakteristike ostalih modelov. V nadaljevanju smo spoznali odprtokodno razvojno okolje Arduino in Arduino programski jezik. V praktičnem delu smo preverili, kako se odprtokodna platforma Arduino izkaže v praksi. Razvili smo avtomatski sistem za samodejno zalivanje, pri čemer smo uporabili številne dodatne komponente, ki smo ji...

  6. UPORABA RAČUNALNIŠKIH PROGRAMOV IN MOBILNIH APLIKACIJ PRI OPAZOVANJU NEBA

    OpenAIRE

    Rogač, Vida

    2015-01-01

    Astronomija je veda, ki je spremljala že pračloveka. Ljudje so se že od nekdaj orientirali po zvezdah. Dandanes astronomije, razen znanstvenih raziskovanj, ne uporabljamo več v tovrstne namene, ampak je ta za večino le hobi. Ljudje se ozirajo v nebo in poskušajo prepoznati objekte, ki jih lahko opazijo na nebu. Pri tem si lahko s pomočjo novih tehnologij pomagamo kar sami. Poiščemo ustrezen računalniški program ali mobilno aplikacijo, ki nam točno poimenuje svetlo piko na nočnem nebu, ki jo o...

  7. Simbolika dogajalnega prostora v Matkovi Tini, Sreči in Krstu pri Savici:

    OpenAIRE

    Božič, Zoran

    2000-01-01

    The typical settings in Matkova Tina, Sreča (Happiness) and Krst pri Savici (The Baptism by the Savica) is locations near a water. Water symbolically bathes away guilt of the central characters, i.e. the innkeeper's Tina, Strežkova Tinka and Črtomir, who all yearned for love but ended up as outcasts and doers of action with fatal consequences. Tina, Tinka and Črtomir did the stations along the river Soča. The river is marked by the figure of the Christian saint John Nepomuce, protector agains...

  8. Vloga medicinske sestre pri skrbi za otroka z očesno protezo

    OpenAIRE

    Lukić, Maja

    2017-01-01

    Uvod: Retinoblastom je najpogostejši maligni tumor, ki se velikokrat pojavi v otroški dobi. Bolezen je sicer redka, a zelo nevarna, saj lahko uniči tako otrokovo oko kot tudi njegov vid. Pomembna je hitra prepoznava tega nevarnega tumorja, takojšna diagnostika in zdravljenje. Večje tveganje za nastanek retinoblastoma obstaja pri otrocih, katerih bolezen se je v družini že pojavila. Namen: Namen diplomskega dela je s pomočjo pregleda literature ugotoviti, na kakšen način in kako lahko medicins...

  9. Uporaba animiranih filmov in risank pri poučevanju naravoslovnih tematik

    OpenAIRE

    Jeraj, Tina; Susman, Katarina

    2017-01-01

    Otroci se z risankami srečujejo že zelo zgodaj, tako v domačem kot v učnem okolju. Uporaba animiranih filmov pri pouku predstavlja motivacijsko orodje, poleg tega pa se ob premišljenem izboru risanke in spremljevalnih dejavnosti učenci tudi učijo. V prispevku je predstavljena raziskava o zastopanosti naravoslovnih tematik in naravoslovnih spodrsljajev (napak, ki so v nasprotju z realnostjo) v naboru risank, ki so trenutno aktualne med učenci. V okviru pedagoške raziskave smo v skupini tretješ...

  10. Miselni procesi pri tekačih na ultramaratonskih preizkušnjah

    OpenAIRE

    Ahac, Urška

    2017-01-01

    Cilj diplomskega dela je bil izluščiti glavne miselne vzorce in vodila rekreativnih tekačev na dolge proge. Pri razdaljah, ki segajo v dvakratni maraton in več, je potrebna izdatna mera samomotivacije, slednja pa lahko izvira iz pozitivnih prepričanj ali pa negativnih preteklih travm posameznika. Vsi, ki tečejo na daljše razdalje, imajo za seboj močan psihološki vzvod in naš namen je bil slednje poiskati ter podrobneje opisati. V tem projektu so povzeti rezultati nekaterih raziskav, ki so...

  11. Vías de señalización en enfermedades priónicas

    OpenAIRE

    Rodríguez Fernández, Agustí

    2007-01-01

    Las enfermedades priónicas, también conocidas como EETs (Encefalopatías Espongiformes Transmisibles), son un grupo de enfermedades neurodegenerativas fatales que, debido a su transmisibilidad potencial han tenido un gran impacto social, político y económico en las últimas décadas. Las EETs afectan a los humanos y a algunos grupos de animales, presentan largos períodos de incubación y producen la muerte pocos meses después de la aparición de la sintomatología clínica. Su origen se atribuye a ...

  12. Solution structure of the N-terminal domain of a replication restart primosome factor, PriC, in Escherichia coli

    Science.gov (United States)

    Aramaki, Takahiko; Abe, Yoshito; Katayama, Tsutomu; Ueda, Tadashi

    2013-01-01

    In eubacterial organisms, the oriC-independent primosome plays an essential role in replication restart after the dissociation of the replication DNA-protein complex by DNA damage. PriC is a key protein component in the replication restart primosome. Our recent study suggested that PriC is divided into two domains: an N-terminal and a C-terminal domain. In the present study, we determined the solution structure of the N-terminal domain, whose structure and function have remained unknown until now. The revealed structure was composed of three helices and one extended loop. We also observed chemical shift changes in the heteronuclear NMR spectrum and oligomerization in the presence of ssDNA. These abilities may contribute to the PriC-ssDNA complex, which is important for the replication restart primosome. PMID:23868391

  13. Effect on Tensor Correlations on Gamow- Teller States in 90Zr and 208Pb

    International Nuclear Information System (INIS)

    Bai, C. L.; Sagawa, H.; Zhang, H. Q.

    2009-01-01

    The tensor terms of the Skyrme effective interaction are included in the self-consistent Hartree-Fock plus Random Phase Approximation (HF-RPA) model. The Gamow-Teller (GT) strength function of 9 0Z r and 2 08P b are calculated with and without the tensor terms. The main peaks are moved downwards by about 2 MeV when including the tensor contribution. About 10% of the non-energy weighted sum rule is shifted to the excitation energy region above 30 MeV by the RPA tensor correlations. The contribution of the tensor terms to the energy weighted sum rule is given analytically, and compared to the outcome of RPA. A microscopic origin of the quenching of GT sum rule is discussed in relation with the coupling to giant spin-quadrupole excitations by the tensor interactions.(author)

  14. Effect of Tensor Correlations on Gamow-Teller States in 90Zr and 208Pb

    International Nuclear Information System (INIS)

    Bai, C. L.; Zhang, H. Q.; Zhang, X. Z.

    2009-01-01

    The tensor terms of the Skyrme effective interaction are included in the self-consistent Hartree-Fock plus Random Phase Approximation (HF-RPA) model. The Gamow-Teller (GT) strength functions of 9 0Z r and 2 08P b is calculated with and without the tensor terms. The main peaks are moved downwards by about 2 MeV when including the tensor contribution. About 10% of the non-energy weighted sum rule is shifted to the excitation energy region above 30 MeV by the RPA tensor correlations. The contribution of the tensor terms to the energy weighted sum rule is given analytically, and compared to the outcome of RPA. A microscopic origin of the quenching of GT sum rule due to the tensor force is discussed.(author)

  15. Inelastic heavy ion scattering on 90Zr and 208Pb at intermediate energies

    International Nuclear Information System (INIS)

    Blumenfeld, Y.; Beaumel, D.; Chomaz, P.; Frascaria, N.; Garron, J.P.; Jacmart, J.C.; Roynette, J.C.; Scarpaci, J.A.; Suomijarvi, T.

    1988-01-01

    Heavy ion inelastic scattering has been investigated using the SPEG spectrometer at GANIL. It is shown that the use of such a high resolution spectrometer allows a quantitative study of the giant resonances excited in heavy ion collisions. The contribution of the pick-up break-up mechanism to the high excitation energy region (E > 30 MeV) is then discussed. Recent results obtained with 40 Ar beams at two different incident energies show that target excitations are also present in this energy region

  16. Investigation on the parity violation in the 207Pb(npol, γ)208Pb reaction

    International Nuclear Information System (INIS)

    Abov, Yu.G.; Ermakov, O.N.; Karpikhin, I.L.

    1987-01-01

    The results of the investigation of P-odd asymmetry in the emission of γ-rays after absorption of transverse-polarized neutrons by nuclei 207 Pb are given. The measurements were carried out on polarized thermal neutron beam of the ITEP reactor. The obtained upper limit of the P-odd asymmetry coefficient is 1.7x10 -5 at the 90% confidence level. This result may be crucial for one-particle (valent) mechanism of the mixing of compound resonance wave function componets having opposite parities

  17. Reanalysis of electron scattering and muonic x-ray data for 208Pb

    International Nuclear Information System (INIS)

    Frair, J.L.; Heisenberg, J.; Negele, J.W.

    1977-01-01

    A simultaneous analysis was performed for the world's supply of data on lead 208. A total of 14 sets of electron scattering data were analyzed along with six independent muonic transition energies. A previously used Fourier Bessel expansion program was expanded to include the full set of available data. The fit was done starting with the density distribution and using 13 expansion coeffients with a cutoff radius of 11 fm. The results are tabulated for muonic energy levels. Interior charge densities of lead 208, differential cross sections, per cent of experimental deviation from the fit, and charge density are plotted. 8 references

  18. A pri-miR-218 variant and risk of cervical carcinoma in Chinese women

    International Nuclear Information System (INIS)

    Shi, Ting-Yan; Cheng, Xi; Wu, Xiaohua; Wei, Qingyi; Chen, Xiao-Jun; Zhu, Mei-Ling; Wang, Meng-Yun; He, Jing; Yu, Ke-Da; Shao, Zhi-Ming; Sun, Meng-Hong; Zhou, Xiao-Yan

    2013-01-01

    MicroRNA (miRNA)-related single nucleotide polymorphisms (SNPs) may compromise miRNA binding affinity and modify mRNA expression levels of the target genes, thus leading to cancer susceptibility. However, few studies have investigated roles of miRNA-related SNPs in the etiology of cervical carcinoma. In this case–control study of 1,584 cervical cancer cases and 1,394 cancer-free female controls, we investigated associations between two miR-218-related SNPs involved in the LAMB3-miR-218 pathway and the risk of cervical carcinoma in Eastern Chinese women. We found that the pri-miR-218 rs11134527 variant GG genotype was significantly associated with a decreased risk of cervical carcinoma compared with AA/AG genotypes (adjusted OR=0.77, 95% CI=0.63-0.95, P=0.015). However, this association was not observed for the miR-218 binding site SNP (rs2566) on LAMB3. Using the multifactor dimensionality reduction analysis, we observed some evidence of interactions of these two SNPs with other risk factors, especially age at primiparity and menopausal status, in the risk of cervical carcinoma. The pri-miR-218 rs11134527 SNP was significantly associated with the risk of cervical carcinoma in Eastern Chinese women. Larger, independent studies are warranted to validate our findings

  19. Prières et service public Prayers and the civil service

    Directory of Open Access Journals (Sweden)

    Gilles J. Guglielmi

    2009-04-01

    Full Text Available La marque de la séparation des Eglises et de l’Etat semble en France suffisamment forte pour que les points de contact entre service public et prière soient rares et plutôt indirects, à partir de comportements qui n’ont en général pas pour objet d’opposer le seul acte de prière aux normes juridiques et sociales environnantes. Néanmoins à partir des systèmes juridiques et des pratiques d’autres pays d’Europe, les arrêts pragmatiques de la Cour européenne des droits de l'homme révèlent une retenue comparable, même si leur fondement est nécessairement différent.Dans son ensemble, la jurisprudence de la Cour permet de constater que les Etats membres du Conseil de l’Europe ont parfois à l’égard de la prière des attitudes restrictives qui dépendent soit d’une sorte de protection de la religion dominante par rapport aux cultes minoritaires, soit d’un refus implicite de l’athéisme. En revanche, la notion de service public, n’étant pas universellement reconnue en Europe, ne fournit pas un cadre de raisonnement juridique signifiant dans les arrêts, ce qui ne permet d’identifier les rapports entre prières et service public que par le biais du contexte dans lequel se produisent les actes de prière.The mark of the separation between the Church and the State seems sufficiently strong in France so that the points of contact between the civil service and prayer are rare and rather indirect, starting with behaviours which do not have in general aim to oppose the sole act of prayer to the legal and social standards surrounding (First part. Nevertheless the legal systems and practices of other countries of Europe reveal the pragmatic judgements of the European Court of Human Rights and their comparable reserve, even if their base is necessarily different (Second part.As a whole, the decisions of the Court make it possible to note that the Member States of the Council of Europe sometimes have restrictive attitudes

  20. Povratna informacija pri matematičnih domačih nalogah

    OpenAIRE

    Žitko, Urša

    2017-01-01

    V diplomskem delu je predstavljena povratna informacija pri matematičnih domačih nalogah. V teoretičnem delu so predstavljene domače naloge: njihova zgodovina, namen in več klasifikacij vrst domačih nalog. Domače naloge so namenjene učencem, da z njimi usvojijo in utrdijo obravnavano snov. Domača naloga učencem omogoča učenje uporabe postopkov, ki jih že poznajo, in pridobivanje novih spretnosti za nadaljnje razumevanje snovi. Z rednim pisanjem domačih nalog se učenci naučijo vestnega in sam...

  1. PRI 3.1: Electrolyte membrane fuel cells (Co-PACEM), final report (july 2002 to june 2004); PRI 3.1: Coeurs de piles a combustible a electrolyte membrane (Co-PACEM), rapport final (juillet 2002 a juin 2004)

    Energy Technology Data Exchange (ETDEWEB)

    Lamy, C.

    2004-07-01

    The researches realized in the PRI Co-PACEM aim to improve the operating of the core of the electrolyte membrane fuel cells, at low temperature in order to minimize the high voltage of the electro-chemical reactions, to decrease the cost of the membrane, to improve the properties (conductivity, mechanical and thermal stability...) and to optimize the transport of heat and reactive. The document presents the research programs. (A.L.B.)

  2. Neki problemi pri prevođenju moderne poezije promatrani kroz teoriju konceptualne integracije

    Directory of Open Access Journals (Sweden)

    Sanja Cimer

    2011-12-01

    Full Text Available Straußeneimondaber ich finde nichts mehrnichts mehr an Buchstaben im Wortmache so ähnlichwie Luftgang ohne Seiles fällt nichts mehraber nichts ist eben auchZaungrenzeund LebenMittelstelzengangder Strauß legt seine Eier in den Himmelfast Massenproduktionkugelrunde Stundenmit Haut auf wirren ÜberzugHände greifen leerwenn nicht duaber das kann nicht –Angsttauchen mit Höhengangund die Hand als Schalewer fängt, – verliert!Mjesec od nojevog jajetaali nema ničeg višeničeg više u slovima riječičinim sličnokao hod po zraku bez konopcaništa više ne padaali i ništa jestgranica od ogradei životsredinom na štulamanoj liježe svoja jaja u nebogotovo masovna proizvodnjasati okrugli poput loptes kožom na neurednoj presvlaciruke posežu u praznoako nisi tiali to ne može –uron u strah s letom u visinei ruka poput ljusketko ulovi, – izgubi!Prevođenje poezije oduvijek se smatralo osobitom temom unutar ionako složenog područja književnog prevođenja. Budući da poezija predstavlja književni oblik u kojem su sadržaj i forma nerazdvojno povezani, jasno je zašto ona predstavlja najzahtjevniji oblik prevoditeljske aktivnosti. Problematičnu točku pri prevođenju poezije predstavlja činjenica da ona daje izrazito “zgusnutu” i kompaktnu formu te da jezik poezije uglavnom počiva na konotacijama, a ne na denotacijama. Noviji pristupi prevođenju prepoznaju da su nekadašnja protivljenja prevođenju poezije, to jest isticanja njezine neprevodivosti, zapravo bila usmjerena na nemogućnost potpunog prenošenja svih aspekata izvornog poetskog djela u ciljni jezik i njegovu kulturu i tradiciju (neprevodivost poezije isticali su, primjerice, T. S. Eliott: “[poezija je] stalni podsjetnik na sve ono što se može reći samo na jednom jeziku”, Roman Jakobson: “poezija je po definiciji neprevodiva” ili Nabokov: “pjesma ne može biti prevedena, reproducirana ni iznova oblikovana na ciljnom jeziku” (svi navedeni citati te citati

  3. Developmentally regulated expression and complex processing of barley pri-microRNAs

    Directory of Open Access Journals (Sweden)

    Kruszka Katarzyna

    2013-01-01

    Full Text Available Abstract Background MicroRNAs (miRNAs regulate gene expression via mRNA cleavage or translation inhibition. In spite of barley being a cereal of great economic importance, very little data is available concerning its miRNA biogenesis. There are 69 barley miRNA and 67 pre-miRNA sequences available in the miRBase (release 19. However, no barley pri-miRNA and MIR gene structures have been shown experimentally. In the present paper, we examine the biogenesis of selected barley miRNAs and the developmental regulation of their pri-miRNA processing to learn more about miRNA maturation in barely. Results To investigate the organization of barley microRNA genes, nine microRNAs - 156g, 159b, 166n, 168a-5p/168a-3p, 171e, 397b-3p, 1120, and 1126 - were selected. Two of the studied miRNAs originate from one MIR168a-5p/168a-3p gene. The presence of all miRNAs was confirmed using a Northern blot approach. The miRNAs are encoded by genes with diverse organizations, representing mostly independent transcription units with or without introns. The intron-containing miRNA transcripts undergo complex splicing events to generate various spliced isoforms. We identified miRNAs that were encoded within introns of the noncoding genes MIR156g and MIR1126. Interestingly, the intron that encodes miR156g is spliced less efficiently than the intron encoding miR1126 from their specific precursors. miR397b-3p was detected in barley as a most probable functional miRNA, in contrast to rice where it has been identified as a complementary partner miRNA*. In the case of miR168a-5p/168a-3p, we found the generation of stable, mature molecules from both pre-miRNA arms, confirming evolutionary conservation of the stability of both species, as shown in rice and maize. We suggest that miR1120, located within the 3′ UTR of a protein-coding gene and described as a functional miRNA in wheat, may represent a siRNA generated from a mariner-like transposable element. Conclusions Seven of the

  4. ¿Por qué perdió el PRI en Yucatán? Las transiciones de este año en bastiones priístas, caída de una imagen distorsionada

    Directory of Open Access Journals (Sweden)

    Lic. Fernando Pacheco Bailón

    2001-01-01

    Full Text Available El pasado domingo 27 de mayo, a eso de las 5:30 de la tarde, los mexicanos nos enteramos a través de los medios de comunicación de televisión abierta y pagada de la ventaja que tenía el candidato a la gubernatura de Yucatán, a través de la coalición PAN, PRD, PVEM, PT, Patricio Patrón Laviada, con respecto al candidato del PRI, Orlando Paredes Lara. Más tarde, de aquella llamada telefónica que hiciera el presidente Vicente Fox para felicitar al candidato que aventajaba al del tricolor, al hacer referencia a las encuestas de salida llevadas a cabo por empresas como Consulta Mitovsky, Garo y otras más. Hay muchas metodologías para poder analizar procesos electorales, así como distintas formas de abordar el problema del por qué perdió el PRI en Yucatán. Para efectos de estudio se planteará las condiciones preelectorales que se dieron, el propio momento electoral del pasado 27 de mayo, así como la visión futura de PRI como organización política en tiempos transitorios.

  5. Vartotojų elgsenos veiksnių įtaka sprendimo pirkti priėmimo procesui

    OpenAIRE

    Jakimavičiūtė, Judita

    2013-01-01

    Magistro baigiamajame darbe išanalizuota ir įvertinta vartotojų elgsenos veiksnių įtaka sprendimo pirkti priėmimo procese, iškeltos vartotojų elgsenos problemos, susiję su vartotojo sprendimu pirkti bei pateikti siūlymai, kaip šias problemas spręsti. Pirmoje darbo dalyje teoriniu aspektu tiriama vartotojų elgsenos samprata, pateikiamos skirtingos Lietuvos bei užsienio autorių nuomonės apie vidinių ir išorinių veiksnių įtaką vartotojų elgsenai bei vartotojų sprendimo priėmimo procesui. Antroje...

  6. Izvedljivost testa stoje na eni nogi na pritiskovni plošči pri dejavnih starejših

    OpenAIRE

    Podvratnik, Jerica

    2018-01-01

    Uvod: Ravnotežje je potrebno za vzdrževanje stabilnega položaja med gibanjem, pri prehodih v različne položaje in med izvajanjem vsakodnevnih dejavnosti. Med teste za ocenjevanje sistemov ravnotežja spada modificiran test senzorične interakcije. S postopkom stabilometrije se s pomočjo pritiskovne plošče zabeleži gibanje središča pritiska. Za uporabno meritev je potrebno, da preiskovanec vzdržuje položaj vsaj 30 sekund. Namen: Z meritvami časa in gibanja središča pritiska pri testu stoje na en...

  7. Vloga medicinske sestre pri nefarmakološki obravnavi otrok in mladostnikov z motnjo pozornosti s hiperaktivnostjo

    OpenAIRE

    Močnik, Anja

    2017-01-01

    Uvod: Motnja pozornosti s hiperaktivnostjo spada v skupino vedenjskih in čustvenih motenj. Odkrita je pri približno 3 do 5 % šoloobveznih otrok. Trije osnovni simptomi so pomanjkljiva in zlahka odvrnljiva pozornost, impulzivnost in hiperaktivnost. Med dejavnike nastanka štejemo biokemične, genetske in nevrološke, diagnosticiranje pa poteka na podlagi simptomov. Kompleksnost problema zahteva celosten pristop, zavračanje farmakološkega zdravljenja s strani nekaterih posameznikov pa nas spodbuja...

  8. mirEX: a platform for comparative exploration of plant pri-miRNA expression data.

    Science.gov (United States)

    Bielewicz, Dawid; Dolata, Jakub; Zielezinski, Andrzej; Alaba, Sylwia; Szarzynska, Bogna; Szczesniak, Michal W; Jarmolowski, Artur; Szweykowska-Kulinska, Zofia; Karlowski, Wojciech M

    2012-01-01

    mirEX is a comprehensive platform for comparative analysis of primary microRNA expression data. RT-qPCR-based gene expression profiles are stored in a universal and expandable database scheme and wrapped by an intuitive user-friendly interface. A new way of accessing gene expression data in mirEX includes a simple mouse operated querying system and dynamic graphs for data mining analyses. In contrast to other publicly available databases, the mirEX interface allows a simultaneous comparison of expression levels between various microRNA genes in diverse organs and developmental stages. Currently, mirEX integrates information about the expression profile of 190 Arabidopsis thaliana pri-miRNAs in seven different developmental stages: seeds, seedlings and various organs of mature plants. Additionally, by providing RNA structural models, publicly available deep sequencing results, experimental procedure details and careful selection of auxiliary data in the form of web links, mirEX can function as a one-stop solution for Arabidopsis microRNA information. A web-based mirEX interface can be accessed at http://bioinfo.amu.edu.pl/mirex.

  9. Primerjava učinkovitosti metode mentorstva in koučinga pri delu z brezposelno osebo

    OpenAIRE

    Jagodnik, Sabina

    2017-01-01

    Magistrsko delo se osredotoča na primerjavo rabe mentorstva in koučinga pri delu z brezposelno osebo z namenom uspešnega nastopa na trgu dela. Primerjava je izpeljana na podlagi treh izpeljanih procesov koučinga ter dveh procesov mentorstva. Preko uporabe metode participativnega akcijskega raziskovanja odgovarja na vprašanja, katera metoda je primernejša glede na potrebe brezposelne osebe za uspešen nastop na trgu dela, njene izkušnje, obstoječa znanja in veščine, katere so prednosti in slabo...

  10. Uporaba JavaEE mikrostoritev pri razvoju celovite rešitve za upravljanje s spletnimi oglasi

    OpenAIRE

    ANDREJC, GAŠPER

    2017-01-01

    Diplomska naloga govori o procesu razvijanja celovite rešitve za sledenje in upravljanje s spletnimi oglasi, kot pomoč uporabniku pri nakupu želenega izdelka. Končni izdelek diplomske naloge je rešitev, ki je sestavljena iz spletne aplikacije, mobilne aplikacije, razširitve v spletnem brskalniku ter zalednega sistema. Diploma poleg idejne zasnove predstavlja tudi uporabo JavaEE mikrostoritev in ostalih tehnologij ter argumentira, zakaj so izbrani okvirji najprimernejši za takšno rešitev. Cilj...

  11. Povezanost barv in čustev pri učencih v 4. razredu osnovne šole

    OpenAIRE

    Kolar, Rebeka

    2012-01-01

    V magistrski nalogi se dotikamo področja barv, ki imajo lahko močan učinek na človeško telo in emocije. Že kot otroci uporabljamo barve tako v domačem okolju kot šoli. Po mnenju strokovnjakov naj bi ravno uporaba posameznih barv razodevala otrokovo emocionalno življenje. Pri tem je pomembno poudariti, da se barvno izražanje otrok skozi njihov razvoj spreminja, nadgrajuje, spreminja se otrokova uporaba in odnos do barv. Raziskave, ki so bile opravljene na tem področju, kažejo, da lahko ravno n...

  12. Pravna razmerja pri pogodbi o nepremičninskem posredovanju (primerjalno pravna ureditev po slovenskem in avstrijskem pravu)

    OpenAIRE

    Koser Dolenc, Martina

    2016-01-01

    Magistrska naloga celovito analizira pravna razmerja pri pogodbi o nepremičniskem posredovanju po slovenskem in avstrijskem pravu. Poudarek je v podrobni predstavitvi in opisu pravic in obveznosti strank, ki izhajajo iz posredniške pogodbe. V Sloveniji je posredniška pogodba urejena v Obligacijskem zakoniku (OZ) in sicer v členih od 837. do 850. Posredniška pogodba je dvostranska obvezna, odplačna, neoblična pogodba. Pravna pravila v zvezi s posredniško pogodbo po OZ so večinoma dispoziti...

  13. Visible Light Excited Catalysis and Reusability Performances of TiO2@Pr:Y2SiO5 Upconversion Materials

    Directory of Open Access Journals (Sweden)

    Yan Jiao

    2017-01-01

    Full Text Available To get high efficiency photodegradation on pollutants under visible light, Pr(III doped Y2SiO5 upconversion materials and anatase TiO2 nanofilm coated Pr:Y2SiO5 composite have been prepared by using a sol-gel method. XRD and SEM test results indicated that TiO2 nanofilm was well coated on Pr:Y2SiO5 to form TiO2@Pr:Y2SiO5 composite particles with the sizes of 0.5–1.0 μm. To avoid secondary pollution resulting from incomplete recovery of catalyst particles, TiO2@Pr:Y2SiO5 was loaded on the glass fiber filters by using a dip-coating method. It is found that the catalyst particles were embedded into the carrier firmly, even after having been reused for 6 times. The luminescence intensities of TiO2@Pr:Y2SiO5 were getting down sharply with the coating contents of TiO2 increased, which was attributed to the adsorption of the luminescence by the TiO2 film in situ. As a result, TiO2@Pr:Y2SiO5 with 4% TiO2, which presented lowest luminescence intensity, showed the highest efficiency on the photodegradation of nitrobenzene wastewater. The catalysts loaded on glass fiber filters showed excellent reusability on the photodegradation of nitrobenzene and presented a photodegradation rate of 95% at the first time and up to 75.9% even after 6 times of reusing by the treatment time of 12 h.

  14. Možnosti prihrankov električne energije pri cestni razsvetljavi, ki se prilagaja količini prometa

    OpenAIRE

    BAVČAR, JERNEJ

    2018-01-01

    V diplomskem delu sem predstavil način in predlog, kako zmanjšati stroške porabe električne energije in svetlobno onesnaževanje z javno razsvetljavo. Pri analizi podatkov sem si pomagal s programom MATLAB. Dobljene vrednosti sem nato obdelal v programskem orodju MS Excel. Na začetku najprej preletim zgodovino razvoja umetne razsvetljave in razvoja javne razsvetljave v Sloveniji in svetu. Za tem opišem veljavne zahteve glede javne razsvetljave in elemente, ki so upoštevani pri načrtovanju n...

  15. Child-Adult Relationship Enhancement in Primary Care (PriCARE): A Randomized Trial of a Parent Training for Child Behavior Problems.

    Science.gov (United States)

    Schilling, Samantha; French, Benjamin; Berkowitz, Steven J; Dougherty, Susan L; Scribano, Philip V; Wood, Joanne N

    Child-Adult Relationship Enhancement in Primary Care (PriCARE) is a 6-session group parent training designed to teach positive parenting skills. Our objective was to measure PriCARE's impact on child behavior and parenting attitudes. Parents of children 2 to 6 years old with behavior concerns were randomized to PriCARE (n = 80) or control (n = 40). Child behavior and parenting attitudes were measured at baseline (0 weeks), program completion (9 weeks), and 7 weeks after program completion (16 weeks) using the Eyberg Child Behavior Inventory (ECBI) and the Adult Adolescent Parenting Inventory 2 (AAPI2). Linear regression models compared mean ECBI and AAPI2 change scores from 0 to 16 weeks in the PriCARE and control groups, adjusted for baseline scores. Of those randomized to PriCARE, 43% attended 3 or more sessions. Decreases in mean ECBI intensity and problem scores between 0 and 16 weeks were greater in the PriCARE group, reflecting a larger improvement in behavior problems [intensity: -22 (-29, -16) vs -7 (-17, 2), P = .012; problem: -5 (-7, -4) vs -2 (-4, 0), P = .014]. Scores on 3 of the 5 AAPI2 subscales reflected greater improvements in parenting attitudes in the PriCARE group compared to control in the following areas: empathy toward children's needs [0.82 (0.51, 1.14) vs 0.25 (-0.19, 0.70), P = .04], corporal punishment [0.22 (0.00, 0.45) vs -0.30 (-0.61, 0.02), P = .009], and power and independence [0.37 (-0.02, 0.76) vs -0.64 (-1.19, -0.09), P = .003]. PriCARE shows promise in improving parent-reported child-behavior problems in preschool-aged children and increasing positive parenting attitudes. Copyright © 2016 Academic Pediatric Association. Published by Elsevier Inc. All rights reserved.

  16. Diurnal and Seasonal Responses of High Frequency Chlorophyll Fluorescence and PRI Measurements to Abiotic Stress in Almonds

    Science.gov (United States)

    Bambach-Ortiz, N. E.; Paw U, K. T.

    2016-12-01

    Plants have evolved to efficiently utilize light to synthesize energy-rich carbon compounds, and at the same time, dissipate absorbed but excessive photon that would otherwise transfer excitation energy to potentially toxic reactive oxygen species (ROS). Nevertheless, even the most rapidly growing plants with the highest rates of photosynthesis only utilize about half of the light their leaves absorb during the hours of peak irradiance in sun-exposed habitats. Usually, that daily peak of irradiance coincides with high temperature and a high vapor pressure deficit, which are conditions related to plant stomata closure. Consequently, specially in water stressed environments, plants need to have mechanisms to dissipate most of absorbed photons. Plants avoid photo-oxidative damage of the photosynthetic apparatus due to the formation of ROS under excess light using different mechanisms in order to either lower the amount of ROS formation or detoxify already formed ROS. Photoinhibition is defined as a reduction in photosynthetic activity due largely to a sustained reduction in the photochemical efficiency of Photosystem II (PSII), which can be assessed by monitoring Chlorophyll a fluorescence (ChlF). Alternatively, monitoring abiotic stress effects upon photosynthetic activity and photoinhibition may be possible using high frequency spectral reflectance sensors. We aim to find the potential relationships between high frequency PRI and ChlF as indicators of photoinhibition and permanent photodamage at a seasonal scale. Preliminary results show that PRI responses are sensitive to photoinhibition, but provide a poor representation of permanent photodamage observed at a seasonal scale.

  17. Arc in a Gas Flowing Through a Magnetic Field; Duga v potoke gaza pri nalichii magnitnogo polya

    Energy Technology Data Exchange (ETDEWEB)

    Baranov, V. Ju.; Vasil' eva, I. A.; Ul' janov, K. N. [Vsesojuznyj Jelektrotehnicheskij Institut Im.V.I. Lenina, Moskva, SSSR (Russian Federation)

    1966-10-15

    The authors have previously shown that ad.c. electric arc can be used in the pre-ionizer of a non-equilibrium MHD generator. The pre-ionizer must be located immediately before the duct inlet, where the magnetic field is fairly strong and may have a substantial effect on the current in the gas flow. In the present paper they consider the behaviour of an electric arc in a gas flowing through a magnetic field. The experiments were carried out with argon, using the apparatus described in Ref. [1] of the paper. The flow was set up in a closed glass loop by means of an electromagnetic accelerator (MHD motor). By suitably treating and adjusting the loop it was possible to conduct the investigations in spectrally pure argon. The pressure varied between 1 and 100 mm Hg, and the flow velocity V{sub 0}{<=} 10{sup 4} cm/sec. The magnetic field in the accelerator (B{sub 1}) and near the arc (B{sub 2}) varied between zero and 7 x 10{sup 3} Oe. The spatial distribution of the electron concentration (n{sub e}) and the electron temperature (T{sub e}) were measured using probe and spectrum analysis methods. The gas temperature (T{sub g} ) was measured by the hot wire method and the flow velocity with the help of pitot tubes. Experiments were carried out in both decelerating and accelerating magnetic fields. (author) [Russian] Jelektricheskaja duga postojannogo toka mozhet byt' ispol'zovana v kachestve jelementa predionizatora v neravnovesnom MGDG. Predionizator dolzhen byt' raspolozhen neposredstvenno pered kanalom generatora v oblasti dostatochno sil'nogo magnitnogo polja, kotoroe mozhet sushhestvenno povlijat' na protekanie toka v potoke. Issledovano povedenie jelektricheskoj dugi v potoke pri nalichii magnitnogo polja. Jeksperimenty byli vypolneny v argone na ustanovke, opisannoj v rabote [1] . Potok v zamknutom stekljannom konture sozdavalsja pri pomoshhi jelektromagnitnogo uskoritelja (MGD dvigatelja). Sootvetstvujushhaja obrabotka i trenirovka kontura davala vozmozhnost

  18. A study of the 208Pb + 197Au reaction at 29 MeV/u through the associated neutron multiplicity

    International Nuclear Information System (INIS)

    Bresson, S.

    1993-01-01

    The investigation of this heavy symmetric system has been carried out through the study of the associated neutron multiplicity. The experimental techniques and data processing are first described, with emphasis on the Orion neutron detector and the hodoscope used to detect the charged reaction products at forward angles. It is shown that the neutron multiplicity is a good measure of the violence of the collision and a good way to characterize the different modes of the reaction. The fission of the quasi-projectile is then characterized and is shown to occur for peripheral collisions. Using simulations, the minimal values of the angular momentum transferred to the quasi-projectile are determined. The results of dynamical calculations using the Landau Vlasov equation are described, which show the importance of angular momentum. It is demonstrated that, at 29 MeV/u, the Pb + Au collision is still governed by deep inelastic reactions in which angular momentum in the exit channel plays an important role

  19. Study of the 2n-evaporation channel in the 4,6He + 206,208Pb reactions

    Czech Academy of Sciences Publication Activity Database

    Lukyanov, S. M.; Penionzhkevich, Y. E.; Astabatian, R. A.; Demekhina, N.A.; Dlouhý, Zdeněk; Ivanov, M.P.; Kalpakchieva, R.; Kulko, A.A.; Markarian, E. R.; Maslov, V. A.; Revenko, R.V.; Skobelev, N. K.; Smirnov, V. I.; Sobolev, Yu. G.; Trazska, W.; Khlebnikov, S. V.

    2009-01-01

    Roč. 670, 4-5 (2009), s. 321-324 ISSN 0370-2693 Institutional research plan: CEZ:AV0Z10480505 Keywords : excitation functions * 208,206Pb Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders Impact factor: 5.083, year: 2009

  20. Oscilacije nagibnog sklopa oruđa pri opaljenju / Oscillation of elevating group on artillery weapon during firing test

    Directory of Open Access Journals (Sweden)

    Zoran Ristić

    2005-03-01

    Full Text Available U radu su opisane oscilacije nagibnog sklopa artiljerijskog oruđa koje nastaju pri opaljenju. Nagibni sklop prikazanje kao kruto telo sa jednim stepenom slobode kretanja (rotacija u vertikalnoj ravni. Model oscilovanja upoređenje sa eksperimentalnim rezultatima realnog modela oscilovanja oruđa (oscilacije nagibnog sklopa sa više stepeni slobode kretanja. Date su razlike između proračunskog i realnog modela oscilovanja i analiza njihovih parametara. / The oscillation of elevating group on artillery weapon during firing test are described in this paper. The elevation group is represented a rigid body of DOF (rotation in vertical plane. The model oscillation is compared -with the experimental results of real model oscillation (oscillations of elevating group with more degrees of freedom. A difference sizes among simplify and real model oscillation are given, and some of their parameters are analyzed.

  1. NON-GENICULATE CORALLINE ALGAE (CORALLINALES, RHODOPHYTA FROM THE LOWER OLIGOCENE OF POLJŠICA PRI PODNARTU (NORTHERN SLOVENIA

    Directory of Open Access Journals (Sweden)

    LUKA GALE

    2009-03-01

    Full Text Available Despite their increasing importance in sedimentology and palaeoecology, non-geniculate coralline algae remain virtually overlooked in Slovenia. Though these plants are present or even abundant in the Cretaceous and Cainozoic strata, they have never been studied in detail with notable exception of corallines from the Lower Oligocene beds in the area of Gornji Grad. Poljšica pri Podnartu is another locality where Lower Oligocene beds are exposed, considered as equivalent to the former. The studied profile consists of pebbly limestone, mudstone, sandstone and limestone. Limestones contain abundant non-geniculate coralline algae. Nine species from six genera of these corallines have been identified: Lithoporella melobesioides (Foslie Foslie, 1909, Neogoniolithon contii (Mastrorilli Quaranta et al., 2007, Spongites sp., Lithothamnion sp. 1, Lithothamnion sp. 2, Mesophyllum sp. 1, Mesophyllum sp. 2, Mesophyllum sp. 3 and Sporolithon sp. Some of these species are described from Slovenia for the first time. 

  2. VPLIV SPOMINSKEGA TRENINGA NA KRATKOTRAJNI IN DOLGOTRAJNI SPOMIN PRI POSAMEZNIKIH S PRIDOBLJENO MOŽGANSKO POŠKODBO

    OpenAIRE

    Ogrizek, Tjaša

    2015-01-01

    Namen te študije je bil preveriti vpliv spominskega treninga N-back na kratko- in dolgotrajne spominske sposobnosti pri udeležencih s pridobljeno možgansko poškodbo. V ta namen sta se izoblikovali dve hipotezi, in sicer (H1) kratkotrajni spomin udeležencev se bo izboljšal ter (H2) dolgotrajni spomin udeležencev se ne bo spremenil. Udeleženci v študiji so bili trije posamezniki, stari 38, 31 ter 26 let, ki imajo pridobljeno možgansko poškodbo. Metodološki pripomočki, uporabljeni v študiji, so ...

  3. The interaction effects of pri-let-7a-1 rs10739971 with PGC and ERCC6 gene polymorphisms in gastric cancer and atrophic gastritis.

    Directory of Open Access Journals (Sweden)

    Qian Xu

    Full Text Available BACKGROUND: The aim of this study was to investigate the interaction effects of pri-let-7a-1 rs10739971 with pepsinogen C (PGC and excision repair cross complementing group 6 (ERCC6 gene polymorphisms and its association with the risks of gastric cancer and atrophic gastritis. We hoped to identify miRNA polymorphism or a combination of several polymorphisms that could serve as biomarkers for predicting the risk of gastric cancer and its precancerous diseases. METHODS: Sequenom MassARRAY platform method was used to detect polymorphisms of pri-let-7a-1 rs10739971 G → A, PGC rs4711690 C → G, PGC rs6458238 G → A, PGC rs9471643 G → C, and ERCC6 rs1917799 in 471 gastric cancer patients, 645 atrophic gastritis patients and 717 controls. RESULTS: An interaction effect of pri-let-7a-1 rs10739971 polymorphism with ERCC6 rs1917799 polymorphism was observed for the risk of gastric cancer (P interaction = 0.026; and interaction effects of pri-let-7a-1 rs10739971 polymorphism with PGC rs6458238 polymorphism (P interaction = 0.012 and PGC rs9471643 polymorphism (P interaction = 0.039 were observed for the risk of atrophic gastritis. CONCLUSION: The combination of pri-let-7a-1 rs10739971 polymorphism and ERCC6 and PGC polymorphisms could provide a greater prediction potential than a single polymorphism on its own. Large-scale studies and molecular mechanism research are needed to confirm our findings.

  4. Persistent organic pollutants, heavy metals and radioactivity in the urban soil of Priština City, Kosovo and Metohija.

    Science.gov (United States)

    Gulan, Ljiljana; Milenkovic, Biljana; Zeremski, Tijana; Milic, Gordana; Vuckovic, Biljana

    2017-03-01

    Polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), heavy metals content and radioactivity levels were measured in 27 soil samples collected from Priština, the capital of Kosovo and Metohija. The sixteen PAHs, twelve OCPs and six PCBs congeners were determined by gas chromatography system with mass spectrometry detection. Although the use of PCBs and OCPs was prohibited decades ago residues of those compounds still existed in measurable concentrations in soils of Priština. PAHs were also present in analyzed samples but their mean concentration was significantly lower than mean concentrations of PAHs previously reported in urban areas in the world. The concentrations of heavy metals (As, Cd, Co, Cr, Cu, Mn, Ni, Pb and Zn) were determined by the EDTA extraction protocols, along with their extractable concentrations. The activity concentrations of natural radionuclides ( 226 Ra, 232 Th and 40 K) were determined by gamma spectrometry method. The Shapiro-Wilk normality test found that activity concentrations of natural radionuclides were normally distributed. Radiological risk was estimated through the annual effective dose, gonadal dose equivalent, excess lifetime cancer risk, radium equivalent activity, external and internal hazard indexes. Spearman correlation coefficient was used for analysis of correlations between physicochemical properties, heavy metal contents and radionuclide activity concentrations. Strong positive correlation between 226 Ra and 232 Th was found, as well as among pairs of As-Cd and Co-Mn. Very strong positive correlation (0.838) at the 0.01 significance level was noted for Pb-Zn pair. Strong correlations indicate common occurrence of these elements in the nature, as well as geogenic association. Copyright © 2016 Elsevier Ltd. All rights reserved.

  5. Pri-let-7a-1 rs10739971 polymorphism is associated with gastric cancer prognosis and might affect mature let-7a expression

    Directory of Open Access Journals (Sweden)

    Li Y

    2016-07-01

    Full Text Available Ying Li, Qian Xu, Jingwei Liu, Caiyun He, Quan Yuan, Chengzhong Xing, Yuan Yuan Tumor Etiology and Screening Department of Cancer Institute and General Surgery, the First Affiliated Hospital of China Medical University, and Key Laboratory of Cancer Etiology and Prevention (China Medical University, Liaoning Provincial Education Department, Shenyang, People’s Republic of China Abstract: The relationship between the pri-let-7a-1 rs10739971 polymorphism and gastric cancer (GC risk has been reported. However, the role of this polymorphism in the prognosis of GC remains largely elusive. Sequenom MassARRAY platform method and the polymerase chain reaction (PCR-restriction fragment length polymorphism were used to investigate pri-let-7a-1 rs10739971 G→A in 334 GC patients. Real-time PCR detected expression of mature let-7a in serum and tissue. Patients with AA or GA+AA genotypes of the pri-let-7a-1 rs10739971 polymorphism demonstrated significantly longer survival time than those with the wild GG genotype. Stratified analysis indicated that survival time was significantly longer in women with AA or GA+AA genotypes and in Borrmann type I/II patients with GA heterozygote or GA+AA genotypes. AA genotype was more frequent in the lymphatic-metastasis-negative subgroup. Serum mature let-7a expression in healthy people with the GA heterozygote and the GA+AA genotype was higher than in those with the GG genotype, and the difference remained significant in the female healthy subgroup. Pri-let-7a-1 rs10739971 polymorphism might be a biomarker for GC prognosis, especially for female and Borrmann type I/II patients. The pri-let-7a-1 rs10739971 polymorphism might affect serum mature let-7a expression, and partly explain the mechanism of the relationship between the pri-let-7a-1 rs10739971 polymorphism and GC survival. Keywords: miRNA, let-7a, polymorphism, gastric cancer, prognosis, expression

  6. La mort d’un couple : prière(s) et vie publiques Death of a couple: prayer(s) and public life

    OpenAIRE

    Mathieu Touzeil-Divina

    2009-01-01

    Si, avant la Loi du 5 décembre 1905, les Eglises et l’Etat concrétisaient matériellement leurs liens étroits par des rites officiels nommés prières publiques, ceux-ci sont censés avoir été supprimés depuis. C’est l’histoire de cette suppression (après en avoir retenu une définition) qui est ici envisagée à travers trois secteurs cardinaux de l’action administrative : la vie universitaire, parlementaire et judiciaire. Dans ces trois hypothèses les prières publiques ont été supprimées de façon ...

  7. Identification and analysis of genetic variations in pri-miRNAs expressed specifically or at a high level in sheep skeletal muscle.

    Directory of Open Access Journals (Sweden)

    Wei Zhang

    Full Text Available MicroRNAs (miRNAs are key regulators in miRNA-mediated gene regulatory networks and play important roles in many biological processes, such as growth and development of mammals. In this study, we used microarrays to detect 261 miRNAs that are expressed in sheep skeletal muscle. We found 22 miRNAs that showed high levels of expression and equated to 89% of the total miRNA. Genetic variations in these 22 pri-miRNAs were further investigated using polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP and sequencing. A total of 49 genetic variations, which included 41 single nucleotide polymorphisms (SNPs and 8 deletions/insertions, were identified in four sheep breeds. Three variations were further researched in a larger sample set, including five sheep breeds with different meat production performances. We found that the genotype and allele frequencies of the CCC deletion/insertion in pri-miR-133a were significantly related to the sheep meat production trait. Finally, cell assays and quantitative reverse transcription PCR (qRT-PCR were employed to investigate the effect of pri-miRNA genetic variation on the miRNA biogenesis process. The results confirmed that genetic variations can influence miRNA biogenesis and increase or decrease the levels of mature miRNAs, in accordance with the energy and stability change of hair-pin secondary structures. Our findings will help to further the understanding of the functions of genetic variations in sheep pri-miRNAs in skeletal muscle growth and development.

  8. Replication restart in UV-irradiated Escherichia coli involving pols II, III, V, PriA, RecA and RecFOR proteins.

    Science.gov (United States)

    Rangarajan, Savithri; Woodgate, Roger; Goodman, Myron F

    2002-02-01

    In Escherichia coli, UV-irradiated cells resume DNA synthesis after a transient inhibition by a process called replication restart. To elucidate the role of several key proteins involved in this process, we have analysed the time dependence of replication restart in strains carrying a combination of mutations in lexA, recA, polB (pol II), umuDC (pol V), priA, dnaC, recF, recO or recR. We find that both pol II and the origin-independent primosome-assembling function of PriA are essential for the immediate recovery of DNA synthesis after UV irradiation. In their absence, translesion replication or 'replication readthrough' occurs approximately 50 min after UV and is pol V-dependent. In a wild-type, lexA+ background, mutations in recF, recO or recR block both pathways. Similar results were obtained with a lexA(Def) recF strain. However, lexA(Def) recO or lexA(Def) recR strains, although unable to facilitate PriA-pol II-dependent restart, were able to perform pol V-dependent readthrough. The defects in restart attributed to mutations in recF, recO or recR were suppressed in a recA730 lexA(Def) strain expressing constitutively activated RecA (RecA*). Our data suggest that in a wild-type background, RecF, O and R are important for the induction of the SOS response and the formation of RecA*-dependent recombination intermediates necessary for PriA/Pol II-dependent replication restart. In con-trast, only RecF is required for the activation of RecA that leads to the formation of pol V (UmuD'2C) and facilitates replication readthrough.

  9. Endocrine and Metabolic Effects of Adipose Tissue in Children and Adolescents / Endokrina in Presnovna Funkcija Maščobnega Tkiva Pri Otrocih in Mladostnikih

    Directory of Open Access Journals (Sweden)

    Kotnik Primož

    2015-03-01

    Full Text Available Maščobno tkivo ima vlogo pri številnih endokrinih in presnovnih procesih. Lepin je bil med prvimi odkritimi dejavniki iz maščobnega tkiva, ki delujejo avto-, para- in endokrino. Od opredelitve leptina so odkrili še številne druge dejavnike, od katerih se nekateri izločajo iz maščobnih celic, nekateri pa iz drugih celic maščobnega tkiva.

  10. Cyrillic alphabet as the designation of national identity among students of University of Priština with temporary head office in Kosovska Mitrovica

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    Miketić Sanja D.

    2016-01-01

    Full Text Available The relationship between culture and nationality and in that sense - national identity of a particular community - is a known thing for a long time. Nationality is usually strongly connected to culture. We will only mention few of their joint characteristics: language, religion, art, customs, tradition etc. In this article special attention will be paid to one of the features of national identity - language - and we will focus on the usage of Cyrillic alphabet of our target group (students of University of Priština, with temporary head office in Kosovska Mitrovica. The study consists of two smaller researches. In the first part we explored reactions of students at University of Priština and we assumed that they will have different reactions towards Cyrillic alphabet and Latin alphabet used as stimuli-words comparing to pupils of Belgrade and Zrenjanin high schools and students of University of Belgrade, Novi Sad and Niš presented in The associative dictionary of Serbian language (Asocjativni rečnik srpskog jezika, 2005. In the second part we tried to find out if our informants prefer the usage of Cyrillic or Latin alphabet, and which one they find better in the esthetic sense. We compared attitudes of students who enroll University of Priština to attitudes of students who enroll University of Belgrade and differences between their attitudes. With both researches we wanted to see if there are formed verbal stereotypes with positive or negative connotation, and what are the attitudes on using Cyrillic alphabet among students in the age of expansion of Latin alphabet. We concluded that Cyrillic alphabet is more used and valued at University of Priština than in the rest of Republic of Serbia and the reason for that might be the stronger sense of national identity among these students.

  11. Annotating and quantifying pri-miRNA transcripts using RNA-Seq data of wild type and serrate-1 globular stage embryos of Arabidopsis thaliana

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    Daniel Lepe-Soltero

    2017-12-01

    Full Text Available The genome annotation for the model plant Arabidopsis thaliana does not include the primary transcripts from which MIRNAs are processed. Here we present and analyze the raw mRNA sequencing data from wild type and serrate-1 globular stage embryos of A. thaliana, ecotype Columbia. Because SERRATE is required for pri-miRNA processing, these precursors accumulate in serrate-1 mutants, facilitating their detection using standard RNA-Seq protocols. We first use the mapping of the RNA-Seq reads to the reference genome to annotate the potential primary transcripts of MIRNAs expressed in the embryo. We then quantify these pri-miRNAs in wild type and serrate-1 mutants. Finally, we use differential expression analysis to determine which are up-regulated in serrate-1 compared to wild type, to select the best candidates for bona fide pri-miRNAs expressed in the globular stage embryos. In addition, we analyze a previously published RNA-Seq dataset of wild type and dicer-like 1 mutant embryos at the globular stage [1]. Our data are interpreted and discussed in a separate article [2].

  12. Annotating and quantifying pri-miRNA transcripts using RNA-Seq data of wild type and serrate-1 globular stage embryos of Arabidopsis thaliana.

    Science.gov (United States)

    Lepe-Soltero, Daniel; Armenta-Medina, Alma; Xiang, Daoquan; Datla, Raju; Gillmor, C Stewart; Abreu-Goodger, Cei

    2017-12-01

    The genome annotation for the model plant Arabidopsis thaliana does not include the primary transcripts from which MIRNAs are processed. Here we present and analyze the raw mRNA sequencing data from wild type and serrate-1 globular stage embryos of A. thaliana , ecotype Columbia. Because SERRATE is required for pri-miRNA processing, these precursors accumulate in serrate-1 mutants, facilitating their detection using standard RNA-Seq protocols. We first use the mapping of the RNA-Seq reads to the reference genome to annotate the potential primary transcripts of MIRNAs expressed in the embryo. We then quantify these pri-miRNAs in wild type and serrate-1 mutants. Finally, we use differential expression analysis to determine which are up-regulated in serrate-1 compared to wild type, to select the best candidates for bona fide pri-miRNAs expressed in the globular stage embryos. In addition, we analyze a previously published RNA-Seq dataset of wild type and dicer-like 1 mutant embryos at the globular stage [1]. Our data are interpreted and discussed in a separate article [2].

  13. A Privacy Protection User Authentication and Key Agreement Scheme Tailored for the Internet of Things Environment: PriAuth

    Directory of Open Access Journals (Sweden)

    Yuwen Chen

    2017-01-01

    Full Text Available In a wearable sensor-based deployment, sensors are placed over the patient to monitor their body health parameters. Continuous physiological information monitored by wearable sensors helps doctors have a better diagnostic and a suitable treatment. When doctors want to access the patient’s sensor data remotely via network, the patient will authenticate the identity of the doctor first, and then they will negotiate a key for further communication. Many lightweight schemes have been proposed to enable a mutual authentication and key establishment between the two parties with the help of a gateway node, but most of these schemes cannot enable identity confidentiality. Besides, the shared key is also known by the gateway, which means the patient’s sensor data could be leaked to the gateway. In PriAuth, identities are encrypted to guarantee confidentiality. Additionally, Elliptic Curve Diffie–Hellman (ECDH key exchange protocol has been adopted to ensure the secrecy of the key, avoiding the gateway access to it. Besides, only hash and XOR computations are adopted because of the computability and power constraints of the wearable sensors. The proposed scheme has been validated by BAN logic and AVISPA, and the results show the scheme has been proven as secure.

  14. Characterization of Staphylococcus aureus Primosomal DnaD Protein: Highly Conserved C-Terminal Region Is Crucial for ssDNA and PriA Helicase Binding but Not for DnaA Protein-Binding and Self-Tetramerization.

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    Yen-Hua Huang

    Full Text Available The role of DnaD in the recruitment of replicative helicase has been identified. However, knowledge of the DNA, PriA, and DnaA binding mechanism of this protein for the DnaA- and PriA-directed replication primosome assemblies is limited. We characterized the DNA-binding properties of DnaD from Staphylococcus aureus (SaDnaD and analyzed its interactions with SaPriA and SaDnaA. The gel filtration chromatography analysis of purified SaDnaD and its deletion mutant proteins (SaDnaD1-195, SaDnaD1-200 and SaDnaD1-204 showed a stable tetramer in solution. This finding indicates that the C-terminal region aa 196-228 is not crucial for SaDnaD oligomerization. SaDnaD forms distinct complexes with ssDNA of different lengths. In fluorescence titrations, SaDnaD bound to ssDNA with a binding-site size of approximately 32 nt. A stable complex of SaDnaD1-195, SaDnaD1-200, and SaDnaD1-204 with ssDNA dT40 was undetectable, indicating that the C-terminal region of SaDnaD (particularly aa 205-228 is crucial for ssDNA binding. The SPR results revealed that SaDnaD1-195 can interact with SaDnaA but not with SaPriA, which may indicate that DnaD has different binding sites for PriA and DnaA. Both SaDnaD and SaDnaDY176A mutant proteins, but not SaDnaD1-195, can significantly stimulate the ATPase activity of SaPriA. Hence, the stimulation effect mainly resulted from direct contact within the protein-protein interaction, not via the DNA-protein interaction. Kinetic studies revealed that the SaDnaD-SaPriA interaction increases the Vmax of the SaPriA ATPase fivefold without significantly affecting the Km. These results indicate that the conserved C-terminal region is crucial for ssDNA and PriA helicase binding, but not for DnaA protein-binding and self-tetramerization.

  15. Les prières et le droit. Considérations d’une sociologue Prayers and the Law. Reflections of a sociologist

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    Régine Azria

    2009-04-01

    Full Text Available Les points de rencontre entre prière et droit sont nombreux, y compris en France où, du fait de la Séparation, on serait fondé à considérer de telles rencontres comme illégitimes sinon impossibles, la prière se référant au religieux donc à la sphère privée et le droit à la justice donc à la sphère publique. Cet essai se propose de démontrer que dans la réalité, les cloisons entre le privé et le public sont moins étanches et les relations entre la religion et le droit plus étroites qu’il n’y paraît. Après avoir évoqué les systèmes de droit religieux (droit canon, charia, halakha produits en marge des droits nationaux, rappelé la diversité des liens juridiques entre État et religion (théocratie, monarchie de droit divin, religion d’État – avec ou sans reconnaissance de minorités religieuses tolérées –, religion de la majorité, pluralisme, Concordat, laïcité, séparation, athéisme d’État et la pluralité des niveaux et sources de normativité au sein même des systèmes religieux, l’article se concentre sur la prière et en décline les différents aspects. En effet, la prière n’est pas plus monolithique que le droit. Exercice solitaire ou pratique collective, expression spontanée ou normée de la foi, du sentiment religieux ou de l’appartenance confessionnelle, affirmation identitaire ou communautaire, la prière est diverse dans ses formes et ses contenus comme dans ses usages. Acte social ou militant, dès lors qu’elle se risque à franchir le seuil de la sphère privée du religieux, la prière rencontre la loi.Meeting points between prayers and the law are many, including in France where, because of the separation between the Church and the State, one would be entitled to consider such junctures as illegitimate if not impossible since prayer is linked to the religious and therefore the private sphere whereas law concerns justice and therefore the public sphere. The present essay

  16. Monitoring phenology of photosynthesis in temperate evergreen and mixed deciduous forests using the normalized difference vegetation index (NDVI) and the photochemical reflectance index (PRI) at leaf and canopy scales

    Science.gov (United States)

    Wong, C. Y.; Arain, M. A.; Ensminger, I.

    2016-12-01

    Evergreen conifers in boreal and temperate regions undergo strong seasonal changes in photoperiod and temperatures, which determines their phenology of high photosynthetic activity in the growing season and downregulation during the winter. Monitoring the timing of the transition between summer activity and winter downregulation in evergreens is difficult since this is a largely invisible process, unlike in deciduous trees that have a visible budding and a sequence of leaf unfolding in the spring and leaf abscission in the fall. The light-use efficiency (LUE) model estimates gross primary productivity (GPP) and may be parameterized using remotely sensed vegetation indices. Using spectral reflectance data, we derived the normalized difference vegetation index (NDVI), a measure of leaf "greenness", and the photochemical reflectance index (PRI), a proxy for chlorophyll:carotenoid ratios which is related to photosynthetic activity. To better understand the relationship between these vegetation indices and photosynthetic activity and to contrast this relationship between plant functional types, the phenology of NDVI, PRI and photosynthesis was monitored in an evergreen forest and a mixed deciduous forest at the leaf and canopy scale. Our data indicates that the LUE model can be parameterized by NDVI and PRI to track forest phenology. Differences in the sensitivity of PRI and NDVI will be discussed. These findings have implications to address the phenology of evergreen conifers by using PRI to complement NDVI in the LUE model, potentially improving model productivity estimates in northern hemisphere forests, that are dominated by conifers.

  17. Improvement of the design and generation of highly specific plant knockdown lines using primary synthetic microRNAs (pri-smiRNAs

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    Alves Leonardo

    2010-03-01

    Full Text Available Abstract Background microRNAs (miRNAs are endogenous small non-coding RNAs that post-transcriptionally regulate gene expression. In plants, they typically show high complementarity to a single sequence motif within their target mRNAs and act by catalyzing specific mRNA cleavage and degradation. miRNAs are processed from much longer primary transcripts via precursor miRNAs containing fold-back structures. Leaving these secondary structures intact, miRNAs can be re-designed experimentally to target mRNAs of choice. Results We designed primary synthetic miRNAs (pri-smiRNAs on the basis of the primary transcript of the Arabidopsis MIR159A gene by replacing the original miR159a and the corresponding miR159a* with novel sequences, keeping the overall secondary structure as predicted by the program RNAfold. We used the program RNAhybrid to optimize smiRNA design and to screen the complete Arabidopsis transcriptome for potential off-targets. To improve the molecular cloning of the pri-smiRNA we inserted restriction sites in the original MIR159A primary transcript to easily accommodate the smiRNA/smiRNA* DNA fragment. As a proof-of-concept, we targeted the single gene encoding chalcone synthase (CHS in Arabidopsis. We demonstrate smiRNA(CHS expression and CHS mRNA cleavage in different transgenic lines. Phenotypic changes in these lines were observed for seed color and flavonol derivatives, and quantified with respect to anthocyanin content. We also tested the effect of mismatches and excess G:U base pairs on knockdown efficiency. Conclusions RNAhybrid-assisted design of smiRNAs and generation of pri-smiRNAs using a novel vector containing restriction sites greatly improves specificity and speed of the generation of stable knockdown lines for functional analyses in plants.

  18. Thermochemical cycles for the heat and cold long-range transport. Final report of the PRI 9.2 Cold transport. Annual report of the PR 2-8; Cycles thermochimiques pour le transport de chaleur et de froid a longue distance. Rapport final du PRI 9.2. Transport de froid. Rapport annuel du PR 2-8

    Energy Technology Data Exchange (ETDEWEB)

    Luo, L.; Tondeur, D. [Laboratoire des Sciences du Genie Chimique (LSGC), 54 - Nancy (France); Mazet, N.; Neveu, P.; Stitou, D.; Spinner, B. [Institut de Science et de Genie des Materiaux et Procedes (IMP), 66 - Perpignan (France)

    2004-07-01

    This PRI deals with the use of thermochemical processes, based on solid-gas reversible transformation, to transfer heat of cold at long-range distance (> 10 km), in order to enhance the energy efficiency. Four main aspects have been studied to confirm the process feasibility: the process identification and the operating conditions, the selection of compatible reagents, the design of an auto-thermal reactor and the gas transport impact on the global performances. (A.L.B.)

  19. Obravnava vedenja in komunikacije po načelih ABA metode pri dvojčkih z avtističnimi motnjami

    OpenAIRE

    Berlot, Barbara

    2017-01-01

    Avtistične motnje sodijo med razvojno nevrološke motnje, ki trajajo celo življenje. Med težave, ki jih imajo osebe z avtističnimi motnjami na različnih področjih funkcioniranja, sodita tudi pojav neustreznih vedenjskih vzorcev in nezmožnost komunikacije z okoljem. Ravno pojav neustreznih vedenjskih vzorcev in nezmožnost komuniciranja z okoljem pri osebah z avtistično motnjo pomembno vplivata na uspešnost vključevanja teh oseb v različne vzgojno-izobraževalne programe. Namen kvalitativne študi...

  20. Anksioznost učencev 6. razreda osnovne šole pri pouku angleščine kot tujega jezika v povezavi z njihovo učno uspešnostjo

    OpenAIRE

    Praček, Anja

    2017-01-01

    Magistrsko delo obravnava anksioznost šestošolcev pri pouku angleščine kot tujega jezika v povezavi z njihovo učno uspešnostjo pri pouku angleščine. Pouk angleščine se v marsičem razlikuje od drugih šolskih predmetov in prav ta posebna učna situacija lahko pri učencih izzove anksioznost. Magistrsko delo je sestavljeno iz teoretičnega in empiričnega dela. V teoretičnem delu je s pomočjo literature na kratko predstavljena trenutna situacija poučevanja in učenja angleščine v slovenskih javnih...

  1. Congés… pour « prières » Prayers and days off

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    Claudine Viard

    2009-04-01

    Full Text Available Les premiers combats de la classe ouvrière se sont portés sur la demande d’une journée de repos, qui par tradition chrétienne a été fixée le dimanche en 1906. Quatre journées de congé à caractère chrétien ont en outre été retenues par le législateur. L’exercice du culte est donc concrètement garanti pour les chrétiens. Avec l’arrivée sur le territoire de la République  de populations de confessions variées, cette organisation du travail apparaît inégalitaire, voire de nature à porter atteinte à la liberté religieuse. Il a été proposé de reconnaître les jours de prières d’autres confessions. Pour l’instant, le législateur n’a pas adopté ces propositions. Mais la question reste posée. Or, la jurisprudence des tribunaux judiciaires et administratifs admet le droit de prier des fidèles des cultes minoritaires, ils peuvent prétendre à un congé lors des fêtes de leur religion dans la mesure où cela n’occasionne pas de perturbation. La consécration de cette jurisprudence souple par le législateur serait de nature à calmer le débat.At the turn of the century, the working classes fought for a day off in the week, which was granted on Sundays by the legislator in 1906. Four additional christian holidays are also legal. So the right to pray is garanteed for christians. As different populations with various faiths settled in France, this organisation has seemed to violate the principle of equality, and religious freedom. There has been a debate on the question whether some of the days of minority religions should also be observed by all the population. But so far, the legislator has not voted any of these proposals. It remains an issue. The French judge has consistently decided that the people of non christian faiths had the right to be granted a day off to pray on these special days, provided it would not cause prejudice to the organisation they work for. It might help to calm the debate if this

  2. Zeaxanthin-independent energy quenching and alternative electron sinks cause a decoupling of the relationship between the photochemical reflectance index (PRI) and photosynthesis in an evergreen conifer during spring.

    Science.gov (United States)

    Fréchette, Emmanuelle; Wong, Christopher Y S; Junker, Laura Verena; Chang, Christine Yao-Yun; Ensminger, Ingo

    2015-12-01

    In evergreen conifers, the winter down-regulation of photosynthesis and its recovery during spring are the result of a reorganization of the chloroplast and adjustments of energy-quenching mechanisms. These phenological changes may remain undetected by remote sensing, as conifers retain green foliage during periods of photosynthetic down-regulation. The aim was to assess if the timing of the spring recovery of photosynthesis and energy-quenching characteristics are accurately monitored by the photochemical reflectance index (PRI) in the evergreen conifer Pinus strobus. The recovery of photosynthesis was studied using chlorophyll fluorescence, leaf gas exchange, leaf spectral reflectance, and photosynthetic pigment measurements. To assess if climate change might affect the recovery of photosynthesis, seedlings were exposed to cold spring conditions or warm spring conditions with elevated temperature. An early spring decoupling of the relationship between photosynthesis and PRI in both treatments was observed. This was caused by differences between the timing of the recovery of photosynthesis and the timing of carotenoid and chlorophyll pool size adjustments which are the main factors controlling PRI during spring. It was also demonstrated that zeaxanthin-independent NPQ mechanisms undetected by PRI further contributed to the early spring decoupling of the PRI-LUE relationship. An important mechanism undetected by PRI seems to involve increased electron transport around photosystem I, which was a significant energy sink during the entire spring transition, particularly in needles exposed to a combination of high light and cold temperatures. © The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology.

  3. PAZ, PRI, AND PROGRESS: OCTAVIO PAZ’S POLITICAL, ECONOMIC AND LITERARY STRUGGLE TO INSPIRE REFORM IN TWENTIETH-CENTURY MEXICO

    Directory of Open Access Journals (Sweden)

    D. Gene Pace

    2003-01-01

    Full Text Available Throughout most of the twentieth century; Mexico’s political and economic policies were heavily influenced by the Partido Revolucionario Institutional (PRI. The landmark 1998 victory by Vicente Fox, the first presidential candidate in seven decades to win without the official sanction of the PRI,marked an important milestone in Mexican history; Octavio Paz, an eloquent proponent of political, economic, and social reform, sought for decades to inspire change. This paper seeks to illuminate Paz’s economic philosophy, and to demonstrate how the acclaimed writer, through courageous symbolic action coupled with an inimitable and potent pen, challenged the PRI’s hegemony in Mexico and contributed to the historic election he almost lived to celebrate (an elderly Paz died shortly before the historic 1998 election.“The Aztec ritual of 2 October [1968] in the Plaza de Tlatelolco. . . convinced me to abandon the Mexican Foreign Service.”“October 2, 1968 ended the student movement. It also ended an era in thehistory of Mexico.”

  4. Nova libro pri interlingvistiko

    Index Scriptorium Estoniae

    2006-01-01

    Rets rmt.: Blanke, Detlev. Interlinguistische Beiträge : zum Wesen und zur Plansprachen / herausgegeben von Sabine Fiedler. Frankfurt/Main, Berlin ; Bern ; Bruxelles ; New York ; Oxford ; Wien : Europäischer Verlag der Wissenschaften Peter Lang

  5. Sun-induced Chlorophyll fluorescence and PRI improve remote sensing GPP estimates under varying nutrient availability in a typical Mediterranean savanna ecosystem

    Science.gov (United States)

    Perez-Priego, O.; Guan, J.; Rossini, M.; Fava, F.; Wutzler, T.; Moreno, G.; Carvalhais, N.; Carrara, A.; Kolle, O.; Julitta, T.; Schrumpf, M.; Reichstein, M.; Migliavacca, M.

    2015-07-01

    This study investigates the performances of different optical indices to estimate gross primary production (GPP) of herbaceous stratum in a Mediterranean savanna with different Nitrogen (N) and Phosphorous (P) availability. Sun-induced chlorophyll Fluorescence yield computed at 760 nm (Fy760), scaled-photochemical reflectance index (sPRI), MERIS terrestrial-chlorophyll index (MTCI) and Normalized difference vegetation index (NDVI) were computed from near-surface field spectroscopy measurements collected using high spectral resolution spectrometers covering the visible near-infrared regions. GPP was measured using canopy-chambers on the same locations sampled by the spectrometers. We hypothesized that light-use efficiency (LUE) models driven by remote sensing quantities (RSM) can better track changes in GPP caused by nutrient supplies compared to those driven exclusively by meteorological data (MM). Particularly, we compared the performances of different RSM formulations - relying on the use of Fy760 or sPRI as proxy for LUE and NDVI or MTCI as fraction of absorbed photosynthetically active radiation (fAPAR) - with those of classical MM. Results showed significantly higher GPP in the N fertilized experimental plots during the growing period. These differences in GPP disappeared in the drying period when senescence effects masked out potential differences due to plant N content. Consequently, although MTCI was tightly related to plant N content (r2 = 0.86, p < 0.01), it was poorly related to GPP (r2 = 0.45, p < 0.05). On the contrary sPRI and Fy760 correlated well with GPP during the whole measurement period. Results revealed that the relationship between GPP and Fy760 is not unique across treatments but it is affected by N availability. Results from a cross validation analysis showed that MM (AICcv = 127, MEcv = 0.879) outperformed RSM (AICcv = 140, MEcv = 0.8737) when soil moisture was used to constrain the seasonal dynamic of LUE. However, residual analyses

  6. PRI 2.1: Basic researches on the photovoltaic: new materials (july 2002 - july 2004). Final report of the integrated research project; PRI 2.1: Recherches de base en photovoltaique: nouveaux materiaux (Juillet 2002 - Juin 2004). Rapport final du projet de recherche integre

    Energy Technology Data Exchange (ETDEWEB)

    Marfaing, Y.

    2004-07-01

    The main material of the photovoltaic cells is the massive crystalline silicon. For a large scale development of the photovoltaic industry, it is necessary to use thin layers. Many materials are possible to reach this objective: different types of silicon (amorphous, mono-crystal, poly-crystal), poly-crystal of CIS type (CuInSe{sub 2}) and organic molecules and polymers. The last two types are innovative and need some researches. These research axis are presented in this PRI. (A.L.B.)

  7. Las élites gobernantes priístas del Estado de México: su conformación y redes 1942-2005

    Directory of Open Access Journals (Sweden)

    Claudia Abigail Morales Gómez

    2006-01-01

    Full Text Available El análisis que se realiza a lo largo de este texto tiene como objetivo explicar la conformación de las élites gubernamentales priístas en las sucesiones del ejecutivo local del Estado de México. Lo cual se pretende demostrar a través de una revisión teórica de las élites y desde la concepción del término; misma que para el caso de estudio se llevó a cabo mediante el reconocimiento de las redes de los principales actores políticos, lo que permite mostrar que sus relaciones de amistad, familiares o laborales son las que le posibilitan ascender y formar parte de las élites gubernamentales.

  8. Trening za razvijanje občutka za števila in količine pri predšolskih otrocih s posebnimi potrebami

    OpenAIRE

    Kuplenk, Petra

    2017-01-01

    Tako otroci kot tudi odrasli se z matematiko srečujemo na vsakem koraku, pa naj bo to na poti v vrtec, službo ali pa pri delu doma. Matematika vsakodnevno vpliva na naše življenje in delo. Na delovnem mestu, v vrtcu, opažam vse večje težave otrok s posebnimi potrebami na področju razvoja občutka za števila in količine. V predšolskem obdobju je namreč nujno, da otroci razvijejo občutek za števila in količine, saj vsa nadaljnja matematična znanja temeljijo na usvojenih spretnostih. V empirič...

  9. Lower Oligocene non-geniculate coralline red algal (Corallinales, Rhodophyta assemblage from Poljšica pri Podnartu (Upper Carniola, Slovenia

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    Luka Gale

    2008-12-01

    Full Text Available The Lower Oligocene Gornji Grad beds from Polj{ica pri Podnartu consist of marly limestone, mudstone, several layers of limestones and two layers of sandstones, and were deposited on a mixed carbonate-siliciclastic ramp.Especially the limestones contain rich fossil fauna and non-geniculate coralline red algae. These were systematicallycollected from four horizons and researched in thin sections under an optical microscope. Genera Lithoporella,Neogoniolithon, Spongites, Lithothamnion, Mesophyllum and Spongites were recognized. Surface area for each genus was calculated and the differences in the coralline assemblages in the four horizons were analysed. Thecorallines originate from two source areas: sandy-muddy bottom of a shallow marine environment, and small coral bioherms with its encrusters.

  10. Izvršilne funkcije pri učencih s primanjkljaji na posameznih področjih učenja

    OpenAIRE

    Senekovič, Jasna

    2017-01-01

    V magistrskem delu z naslovom Izvršilne funkcije pri učencih s primanjkljaji na posameznih področjih učenja v prvem delu predstavljamo dosedanja spoznanja o izvršilnih funkcijah in učnih težavah v osnovni šoli, še posebej učencev s primanjkljaji na posameznih področjih učenja (PPPU). Tako smo v teoretičnem delu najprej opredelili osnovne pojme izvršilne funkcije, samoregulacija, metakognicija, učenje učenja in učne težave, posebej še primanjkljaje na posameznih področjih učenja. Podrobneje sm...

  11. La mort d’un couple : prière(s et vie publiques Death of a couple: prayer(s and public life

    Directory of Open Access Journals (Sweden)

    Mathieu Touzeil-Divina

    2009-04-01

    Full Text Available Si, avant la Loi du 5 décembre 1905, les Eglises et l’Etat concrétisaient matériellement leurs liens étroits par des rites officiels nommés prières publiques, ceux-ci sont censés avoir été supprimés depuis. C’est l’histoire de cette suppression (après en avoir retenu une définition qui est ici envisagée à travers trois secteurs cardinaux de l’action administrative : la vie universitaire, parlementaire et judiciaire. Dans ces trois hypothèses les prières publiques ont été supprimées de façon différente (respectivement : par désuétude, par une Loi constitutionnelle et par circulaire. On constatera, enfin, l’actualité (troublante de certains de ces rites non exclus totalement de notre vie publique … laïque.If, before the law from December 5, 1905 law, Churches and the State would concretely manifest their close links through official rites called public prayers, these rites are supposed to have since been abolished. This article deals with the history of this abolition – which it first defines – through the study of the three central sectors of the public sector’s activity: university, parliament and judiciary life. In these three hypotheses, prayers have been abolished in various ways (respectively: by obsolescence, by constitutional statute-law and by decree. It will eventually focus on the (disquieting actuality of some of these rites not entirely excluded from our « secular » public life.

  12. Measure of total nuclear absorption cross sections of photons in the Δ (1232) range. Studied nucleus 12C and 208Pb

    International Nuclear Information System (INIS)

    Ghedira, Lotfi

    1984-01-01

    We present a new determination of the nuclear total photoabsorption cross section, on carbon and lead in the Δ 33 resonance region: 133 MeV ≤ E γ ≤ 531 MeV. The principle of the experimental method is the measurement of the hadronic products emitted during the absorption process. We used the Saclay tagged photon beam obtained by flight annihilation of positrons. The reaction target was placed inside a cylindrical Nal scintillator, covering 93 pc of 4π. A set of plastic scintillators covered the inside of the detector in order to determine the charge multiplicity of the hadronic events. The very large efficiency of this detector allowed the detection of 70 to 80 pc of the total number of hadronic events, so that the uncertainties induced by the extrapolation of the undetected part of the cross section are small. The total hadronic cross section was found to be close to 400 μb/ nucleon at the maximum for both C and Pb. In addition to the total cross section we give values for a few partial cross sections. Previous experimental work as well as theoretical predictions are compared to our results. (author) [fr

  13. Fission of spin-aligned projectile-like nuclei in the interactions of 29 MeV/nucleon 208Pb with 197Au

    International Nuclear Information System (INIS)

    Bresson, S.; Morjean, M.; Jastrzebski, J.; Skulski, W.; Kordyasz, A.; Lott, B.

    1992-01-01

    Binary fission of projectile-like nuclei was investigated in the interaction of 29 MeV/nucleon Pb on Au, together with the associated neutron multiplicity. Fission is only observed in rather peripheral collisions and represents approximately 20% of the total reaction cross-section. The fission process occurs after collisions in which up to 550 MeV have been dissipated. The angular and energy distribution of the fragments can be accounted for by assuming a noticeable spin alignment of the fissioning nuclei. (author) 18 refs.; 3 figs

  14. Beam losses from ultra-peripheral nuclear collisions between $^{208}$Pb$^{82+}$ ions in the Large Hadron Collider and their alleviation

    CERN Document Server

    Bruce, R.; Jowett, J.M.; Bocian, D.; CERN. Geneva. BE Department

    2009-01-01

    Electromagnetic interactions between colliding heavy ions at the Large Hadron Collider (LHC) at CERN will give rise to localized beam losses that may quench superconducting magnets, apart from contributing significantly to the luminosity decay. To quantify their impact on the operation of the collider, we have used a three-step simulation approach, which consists of optical tracking, a Monte-Carlo shower simulation and a thermal network model of the heat flow inside a magnet. We present simulation results for the case of Pb ion operation in the LHC, with focus on the ALICE interaction region, and show that the expected heat load during nominal Pb operation is 40% above the quench level. This limits the maximum achievable luminosity. Furthermore, we discuss methods of monitoring the losses and possible ways to alleviate their effect.

  15. Wavelet analysis of angular spectra of relativistic particles in 208Pb induced collisions with emulsion nuclei at 158A GeV/c

    International Nuclear Information System (INIS)

    Fedorisin, J.; Vokal, S.

    2008-01-01

    The continuous wavelet transform is applied to the pseudorapidity spectra of relativistic secondary particles created in Pb + Em nuclear collisions at 158A GeV/c. The wavelet pseudorapidity spectra are subsequently surveyed at different scales to look for signs of ring-like correlations whose presence could be explained either via the production of Cherenkov gluons or the propagation of Mach shock waves in excited nuclear medium. The presented approach is established on the basic prerequisite that the both effects would lead to excess of particles at certain typical pseudorapidities. Furthermore, the particles contributing to the ring-like structures are expected to have uniform azimuthal distributions. The multiscale analysis of the wavelet pseudorapidity spectra reveals the irregularities which are interpreted as the favoured pseudorapidities of groups of produced particles. A uniformity of the azimuthal structure of the disclosed pseudorapidity irregularities is examined, eventually leading to the conclusion that the irregularities are not related to correlations of a ring-like nature

  16. Spectroscopy study after quasi-elastic collision in the system 208Pb+232Th at an incident energy of 17 MeV per nucleon

    International Nuclear Information System (INIS)

    Happ, T.

    1989-01-01

    In the present thesis by means of a particle-particle-γ and particle-particle-neutron coincidence experiment γ and neutron spectroscopic studies after quasi-elastic collisions at incident energies far above the Coulomb barrier were performed. For the study of the γ decay by the necessary correction of the Doppler shift the possibility results to study excitations in the projectile and in the target. So in the case of 232 Th beside the observation of the ground state band up to the spin 14 ℎ also a very large number of transitions from vibrational side bands. From the spectra the γ emission probabilities in dependence on the distance of closest approximation were extracted. (orig./HSI) [de

  17. Evalvacija nivojskega pouka pri pouku slovenščine v 8. in 9. razredih na osnovnih šolah v občinah Ormož, Središče ob Dravi in Sveti Tomaž

    OpenAIRE

    Lalić, Marko

    2012-01-01

    Mnenja o učni diferenciaciji in individualizaciji pouka ter z njima povezanim nivojskim poukom so že od samega začetka predmet nasprotujočih si mnenj tako pri strokovnjakih kot pri laikih. Nivojski pouk, ki je v veljavi vse od leta 1996, je poskrbel, da proces poučevanja poteka na drugačnem učiteljevem pristopu, na večji učenčevi aktivnosti, povezovanju učnih vsebin in prilagajanju učenčevih individualnih posebnosti. Leta 2006 je bil nivojski pouk kot sistemski ukrep opuščen. Šolam pa je bilo...

  18. Li tter Fall i n A Pri mary an d Two Logged -over Lowland Tropical Rainfore sts in Pasirmayang, Jam bi.

    Directory of Open Access Journals (Sweden)

    UPIK ROSALI NA WAS R IN

    1999-01-01

    Full Text Available Litte r accu mulatio n in a prim ary and a log g ed-ove r lo wland dipterocarp fore st at Pa si rmayang, Ja mbi wa s measu red u sin g the litte r trap met hod . In the p rimary fore st , tra p s were placed in fou r d istinc t areas, reflectin g th e su ccess ion stages of the fo rest fr om building t o mat u ration. In the logged-over fo re st , litter p roduc tion w a s measured at two differe nt si tes, one cut in 197 9/1980 a nd t h e second i n 1 983/1984. In the prim ary fore st , ave rage litter production during the ob serv ation period wa s 925 g m"2yr '. In the lo gged -over f o r e st , ave rage l itte r production wa s 721 g m '2 yr1 for t h e sit e cut in 1979 /198 0 and 70 6 g m '2 yr1 f o r the site cut in 19 83/1 984 . Leave s com p ri sed the major con tri butor of litter wit h 67% of tota l litter produced in t h e pri m ary forest, 67% of total litter i n the 1979/ 1980 cut log g ed-o ver fore st, and 65 % of total li tter in the 1983/1984 cut logged-over fore st . The pu rp ose of the stu dy wa s to use litte r fa ll a s a measure of forest pro ductivi ty to a ssess the recovery of log g ed -over forests and , t o pro v ide a basi s for co mpariso n o f forest-de rived land practices for app ropriate fo re st manage ment stra tegies .

  19. Las redes sociales en las campañas de los candidatos a diputados locales del PRI , el PAN y el PRD en las elecciones de 2015 en el Estado de México / Social media in local campaigns of pri , pan and prd candidates in the 2015 State of Mexico legislative elections

    Directory of Open Access Journals (Sweden)

    Leticia Heras Gómez

    2018-01-01

    Full Text Available El objetivo del artículo es examinar la comunicación política de los partidos a través de las redes sociales (Facebook y Twitter en las elecciones de 2015 para el Congreso local del Estado de México. Con este fin, se realizó un análisis de contenido de todos los mensajes en redes sociales de los candidatos del Partido Revolucionario Institucional (PRI el Partido Acción Nacional (PAN y el Partido de la Revolución Democrática (PRD a partir de una muestra de nueve de los 45 distritos electorales uninominales, con base en una codificación que clasifica su contenido en ocho categorías relevantes. Contrario a los supuestos de la literatura sobre la posmodernización de las campañas electorales, los resultados del estudio muestran que el uso político de las redes sociales en las elecciones locales en México es todavía limitado y que los canales basados en Internet aún no han logrado desplazar a las formas tradicionales de comunicación ni de participación electoral. En general, los datos revelan que las redes sociales se utilizan esencialmente como agenda o diario de actividades de los candidatos, los cuales buscan una mayor visibilidad de su imagen, pero con escasa incidencia en los resultados electorales. / The aim of this article is to examine political party communication through social media (Facebook and Twitter in the 2015 local congressional elections of the State of Mexico. According to that purpose, we carried out a content analysis of social media messages of all congressional candidates of the PRI, PAN, and PRD from a sample of nine single-member districts out of 45, by using a coding of eight relevant categories. The results of our study show that the political use of social media in local elections in México is still quite limited and that Internet channels have not replaced traditional methods of political communication and electoral participation, which is contrary to the assumptions of post-modernization literature

  20. A Simple and High-Throughput Analysis of Amatoxins and Phallotoxins in Human Plasma, Serum and Urine Using UPLC-MS/MS Combined with PRiME HLB μElution Platform

    Directory of Open Access Journals (Sweden)

    Shuo Zhang

    2016-05-01

    Full Text Available Amatoxins and phallotoxins are toxic cyclopeptides found in the genus Amanita and are among the predominant causes of fatal food poisoning in China. In the treatment of Amanita mushroom poisoning, an early and definite diagnosis is necessary for a successful outcome, which has prompted the development of protocols for the fast and confirmatory determination of amatoxins and phallotoxins in human biological fluids. For this purpose, a simple, rapid and sensitive multiresidue UPLC-MS/MS method for the simultaneous determination of α-amanitin, β-amanitin, γ-amanitin, phalloidin (PHD and phallacidin (PCD in human plasma, serum and urine was developed and validated. The diluted plasma, serum and urine samples were directly purified with a novel PRiME technique on a 96-well μElution plate platform, which allowed high-throughput sample processing and low reagent consumption. After purification, a UPLC-MS/MS analysis was performed using positive electrospray ionization (ESI+ in multiple reaction monitoring (MRM mode. This method fulfilled the requirements of a validation test, with good results for the limit of detection (LOD, lower limit of quantification (LLOQ, accuracy, intra- and inter-assay precision, recovery and matrix effects. All of the analytes were confirmed and quantified in authentic plasma, serum and urine samples obtained from cases of poisoning using this method. Using the PRiME μElution technique for quantification reduces labor and time costs and represents a suitable method for routine toxicological and clinical emergency analysis.

  1. Scanning in Thyroid Cancer; Exploration des tumeurs de la thyroide; Ispol'zovanie radioizotopov pri issledovanii raka shchitovidnoj zhelezy; Exploracion de los tumores tiroideos

    Energy Technology Data Exchange (ETDEWEB)

    Bauer, Franz K [Radioisotope Centre, University of Southern California School of Medicine, Los Angeles, CA (United States)

    1959-07-01

    methode qui permette de suivre l'evolution de la maladie. (author) [Spanish] La exploracion de los tumores de la tiroides reviste interes para: 1. El diagnostico preoperatorio de los nodulos tiroideos; 2. La localization de metastasis del cancer de tiroides; 3. El tratamiento de los enfermos tiroidectomizados, con metastasis del cancer de la tiroides. El autor describe el aspecto de los nodulos tiroideos en el centelleograma y proporciona algunos resultados preliminares obtenidos con el empleo del fosforo radiactivo y con el recuento externo de los nodulos < inactivos > mediante un contador Geiger-Mueller. El autor describe asimismo la localizacion de las metastasis del cancer de la tiroides, destacando, especialmente, el empleo de la hormona tirotropica. Ese metodo ha permitido comprobar que las tres cuartas partes de los enfermos que padecen de tumores metastaticos de la tiroides tienen metastasis activas. Estudia detalladamente la tecnica de la ablation de los restos glandulares que suelen quedar despues de la tiroidectomia total, asi como el tratamiento de las metastasis. La exploracion de las metastasis constituye el mejor medio para observar la evolucion de la enfermedad. (author) [Russian] Primenenie radioizotopov v issledovanii raka shchitovidnoj zhelezy rekomenduetsya v sleduyushchikh sluchayakh: 1. Predoperatsionny j diagnoz uzelkovogo utolshcheniya shchitovidnoj zhelezy; 2. Lokalizatsiya metastazov raka shchitovidnoj zhelezy; 3. Lechenie bol'nykh s udalennoj shchitovidnoj zhelezoj, no s metastazami, obrazovann{sup m}i rakom ehtoj zhelezy; Opisyvaetsya vliyanie uzelkovykh utolshchenij shchitovidnoj zhelezy na etsiitigrammu. Soobshchaetsya o nekotorykh predvaritel'nykh rezul'tatakh opredeleniya < kholodnykh > utolshchenij pri pomoshchi radioaktivnog o fosfora i naruzhnogo primeneniya schetchika Gejgera-Myullera. Opisyvaetsya lokalizatsiya metastazov raka shchitovidnoj zhelezy i v osobennosti ispol'zovanie dlya ehtoj Deli gormona perednej doli gipofiza. S pomoshch

  2. Avtomatsko vodenje pri avtonomnih jadrnicah

    OpenAIRE

    ROJE, MARIN

    2016-01-01

    Avtonomne jadrnice so robotska plovila, ki brez potrebe po človekovih posegih uporabljajo veter za pogon in upravljajo z jadri in krmilom. Namen razvoja teh plovil je izdelava jadrnice brez posadke, ki omogoča popolno samostojno jadranje, varno plovbo in izvajanje dolgoročnih nalog na morju. Najpomembnejši sistemi avtonomnih jadrnic so: sistem za dolgoročno načrtovanje plovne poti v odvisnosti od vremenskih razmer, sistem za kratkoročno preusmerjanje jadrnice v odvisnosti od trenutnih pod...

  3. Primenenie piyavita pri sakharnom diabete

    Directory of Open Access Journals (Sweden)

    E V Mikhaylova

    1999-06-01

    Full Text Available Актуальность. Микроциркуляторные сосудистые нарушения при сахарном диабете (СД носят вторичный характер, но необходимость их коррекции выходит на первый план, так как они являются причиной стойких, некупируемых сахароснижающими препаратами патологических состояний (нефропатия, ретинопатия и др., ведущих к инвалидизации. Имеются данные о влиянии пиявита на реологические свойства крови, васкулярно-тромбоцитарный гемостаз, липидный обмен, атерогенез. Цель. Изучение влияния Пиявита на реологические свойства крови, васкулярно-тромбоцитарный гемостаз, липидный обмен, атерогенез. Материалы и методы Обследовано 30 человек: 22 больных сахарным диабетом 2 типа в возрасте от 41 года до 67 лет и 8 больных с СД 1 типа в возрасте от 17 до 42 лет. 13 пациентов с СД 2 получали инсулин и сахароснижаюшие препараты, 9 ? только сахароснижаюшие препараты. Все больные СД 1 типа находились на инсулинотерапии. На фоне указанных методов лечения больным назначали Пиявит. Лечение пиявитом проводили в течение 3 нед. по 300 мг 2 раза в день. Результаты. Данные свидетельствуют об улучшении показателей липидного обмена: снижении уровня холестерина сыворотки крови и триглицеридов. Полученные результаты свидетельствуют о снижении гиперкогуляционного потенциала крови и усилении фибринолитической активности крови под влиянием пиявита. Выводы. На фоне лечения пиявитом у больных сахарным диабетом отмечено улучшение показателей липидного обмена и системы гемостаза. Пиявит можно рекомендовать для комплексной терапии больных сахарным диабетом 1 и 2 типа.

  4. Animal Representations on Ceremonial Objects Found in the Tumulus at Črnolica pri Šentjurju at the Foot of Rifnik

    Directory of Open Access Journals (Sweden)

    Iztok Vrenčur

    2013-07-01

    Full Text Available The years 1985 and 1986 saw a rescue excavation by archaeologists from the Institute for the Protection of Cultural Heritage of Slovenia, Celje Regional Office, performed on the severely damaged Iron Age tumulus in the village of Črnolica pri Šentjurju. The village lies in the close vicinity of the Rifnik hill, the site of one of the largest known hilltop settlements in Slovenia dating from the Late Bronze and Iron Ages. The excavation in Črnolica yielded a stone grave chamber of monumental dimensions, together with fragmented and decontextualised grave goods. These included a large set of quality ceramic vessels, a considerable number of bronze vessels, glass cups, fibulae, and a horse harness. Of special importance are three bronze items fabricated in Etruria, which carry the protomas of an aquatic bird, horses, and a ram. The burial dates to the Hallstatt C2 period or the second half of the 7th century BC. Aquatic birds are positioned on all four vertexes of the presentatoio, a special type of vessel presumably used for libation rituals. Comparable items have come to light in the richest graves of the Iron Age aristocracy of Etruria, Latium Vetus and Bologna, and date to the end of the 8th and the beginning of the 7th centuries BC. The aquatic bird sculptures on the presentatoio are stylised, displaying features of the Late Italic Geometric style. This motif marks various Late Bronze and Iron Age items associated with ritual activities in the greater part of Europe, connecting them with prehistoric religious beliefs. While the assumption that they refer to the sun divinisation cult is not proven, they must have signified some prehistoric aspect of the holy or numinous. The two anthropomorphic legs with an attached horse protoma found in the Črnolica tumulus were reconstructed as a part of a tripod of small dimensions, which can be classified as a member of the so-called horse tripod family, fine products of the Italic Geometric style

  5. Anxiety, Self-Esteem and Coping With Stress in Secondary School Students in Relation to Involvement in Organized Sports / Anksioznost, Samospoštovanje In Spoprijemanje S Stresom Pri Srednješolcih V Povezavi Z Vključenostjo V Organizirano Športno Aktivnost

    Directory of Open Access Journals (Sweden)

    Dolenc Petra

    2015-09-01

    Full Text Available Cilj. Namen raziskave je bil preučiti raven samospoštovanja in anksioznosti ter uporabo različnih strategij spoprijemanja s stresom pri srednješolskih mladostnikih v povezavi z vključenostjo v redno in organizirano športno vadbo.

  6. Perfil político de los diputados mexicanos federales del pan y pri de la LXI Legislatura: apuntes para un estudio cualitativo de los políticos

    Directory of Open Access Journals (Sweden)

    Mónica Montaño Reyes

    2014-01-01

    Full Text Available El descontento ante la democracia ha pro - vocado que el estudio del capital humano que dirige las instituciones representativas cobre relevancia. En este artículo se analiza el perfil político de 382 diputados federales del Partido Acción Nacional ( pan y del Partido Revolucionario Institucional ( pri de la lxi Legislatura. El análisis contem - pla sus competencias profesionales, su trayectoria y su experiencia política. Los resultados muestran datos relevantes sobre los personajes que ejercen los puestos de representación política en México; la revisión de sus competencias personales y de su trayectoria profesional lleva a concluir que la carrera política es un factor de gran importancia para el mejor funcionamiento de la democracia representativa.

  7. Preliminary evidence for association of genetic variants in pri-miR-34b/c and abnormal miR-34c expression with attention deficit and hyperactivity disorder.

    Science.gov (United States)

    Garcia-Martínez, I; Sánchez-Mora, C; Pagerols, M; Richarte, V; Corrales, M; Fadeuilhe, C; Cormand, B; Casas, M; Ramos-Quiroga, J A; Ribasés, M

    2016-08-30

    Attention deficit and hyperactivity disorder (ADHD) is a prevalent neurodevelopmental disorder characterized by impairment to sustain attention and inability to control impulses and activity level. The etiology of ADHD is complex, with an estimated heritability of 70-80%. Under the hypothesis that alterations in the processing or target binding of microRNAs (miRNAs) may result in functional alterations predisposing to ADHD, we explored whether common polymorphisms potentially affecting miRNA-mediated regulation are involved in this psychiatric disorder. We performed a comprehensive association study focused on 134 miRNAs in 754 ADHD subjects and 766 controls and found association between the miR-34b/c locus and ADHD. Subsequently, we provided preliminary evidence for overexpression of the miR-34c-3p mature form in peripheral blood mononuclear cells of ADHD subjects. Next, we tested the effect on gene expression of single-nucleotide polymorphisms within the ADHD-associated region and found that rs4938923 in the promoter of the pri-miR-34b/c tags cis expression quantitative trait loci for both miR-34b and miR-34c and has an impact on the expression levels of 681 transcripts in trans, including genes previously associated with ADHD. This gene set was enriched for miR-34b/c binding sites, functional categories related to the central nervous system, such as axon guidance or neuron differentiation, and serotonin biosynthesis and signaling canonical pathways. Our results provide preliminary evidence for the contribution to ADHD of a functional variant in the pri-miR-34b/c promoter, possibly through dysregulation of the expression of mature forms of miR-34b and miR-34c and some target genes. These data highlight the importance of abnormal miRNA function as a potential epigenetic mechanism contributing to ADHD.

  8. Doenças priônicas: avaliação dos riscos envolvidos na utilização de produtos de origem bovina Prionic disease: evaluation of the risks involved in using products of bovine origin

    Directory of Open Access Journals (Sweden)

    Omar Lupi

    2003-02-01

    Full Text Available Os príons são proteínas que se mostram capazes de auto-replicação apesar de, para isso, alterar o metabolismo celular. São responsáveis por inúmeras doenças em animais e no ser humano (doenças priônicas, todas elas fatais. Essas moléstias apresentam enorme variabilidade quanto ao período de incubação, de alguns meses a 40 anos. Os príons acumulam-se e destroem os neurônios, provocando quadros conhecidos como encefalopatias espongiosiformes. Discute-se a apresentação clínica, epidemiológica e histórica das doenças priônicas. O foco maior de discussão recai, no entanto, na possibilidade teórica da transmissão iatrogênica dos príons por meio das formulações tópicas que utilizam ceramidas (cerebrosídeos ou placenta de origem bovina, assim como pelo risco representado por alguns procedimentos dermatológicos, como transplantes da pele e implantes de colágeno.A prion is a protein that is capable of self replication, thereby altering a cell's metabolism. It is responsible for a number of human and animal diseases (prionic diseases, all of which are always lethal. These diseases have enormous variability in their incubation periods, ranging from a few months to forty years. Prions accumulate and destroy nerve cells, causing spongiform encephalopathy. We discuss the clinical picture, epidemiology, and historical background of prionic diseases. The major focus of the discussion lies, however, on the theoretical possibility of iatrogenic transmission of prion infection due to topical formulations using ceramides (cerebrosides or placenta of bovine origin, as well as the risk represented by some dermatological procedures such as skin grafts and collagen implants.

  9. Association of Average Telomere Length with Body-Mass Index and Vitamin D Status in Juvenile Population with Type 1 Diabetes / Povezava Povprečnih Dolžin Telomerov Z Indeksom Telesne Teže in Vitaminom D Pri Mladostnikih S Sladkorno Boleznijo Tipa 1

    Directory of Open Access Journals (Sweden)

    Tesovnik Tine

    2015-03-01

    Full Text Available Izhodišče. Sladkorna bolezen tipa 1 (SBT1 je kronična avtoimunska bolezen, pri kateri hiperglikemija ter zvišana raven oksidativnega stresa in končnih produktov glikacije skupaj z genetskimi in okoljskimi dejavniki privedeta do nastanka diabetičnih zapletov. Krajše dolžine telomerov so povezane s hiperglikemičnimi epizodami in nižjimi serumskimi vrednostmi vitamina D.

  10. Cold distribution networks. Cold distribution by two-phase refrigerant fluid. Case of ice slurries; Reseaux de distribution de froid. Distribution de froid par fluide frigoporteur diphasique. Cas du coulis de glace stabilisee (2002 - 2004). Rapport final (1er juillet 2004). Programme energie. PRI 9.1

    Energy Technology Data Exchange (ETDEWEB)

    Lallemand, A. [Institut National des Sciences Appliquees (INSA), Centre de Thermique de Lyon (CETHIL), UMR 5008, 69 - Villeurbanne (France); Mercier, P. [CEA Grenoble, Groupement pour la Recherche sur les Echangeurs Thermiques (GRETH), 38 (France); Royon, L. [Paris-1 Univ., Lab. de Biorheologie et d' Hydrodynamique Physico-Chimique, 75 (France); Dumas, J.P. [L' Ecole Nationale Superieure en Genie des Technologies Industrielles, Lab. de Thermique Energetique et Procedes, 64 - Pau (France); Guilpart, J. [URGPAN/CEMAGRE, 33 - Bordeaux (France)

    2004-07-01

    This PRI aims to participate to the development of alternate solutions for refrigerant fluids, for the cold transport and more specially a two phase refrigerant fluid: the stabilized ice slurry. The research program presented three main axis: design, realization and characterization of stabilized ice slurry, experimental studies of transport and transfer properties, study of online measurement process of the solid content. A simulation has been realized to evaluate the energy efficiency of this refrigerant use. (A.L.B.)

  11. Neutron Tests at the Start-Up of EDF1; Les essais neutroniques au demarrage du reacteur EDF1; Nejtronnye izmereniya pri puske reaktora EDF1; Ensayos neutronicos efectuados durante la puesta en marcha del reactor EDF1

    Energy Technology Data Exchange (ETDEWEB)

    Teste du Bailler, A. [Centre d' Etudes Nucleaires de Saclay (France); Janin, R. [Electricite de France, Paris (France)

    1963-10-15

    ehksperimental'nykh metodov, razrabotannykh na reaktorakh v Markule, byla provedena vo vremya puska reaktora EDF.1. Izmereniya kasalis' glavnym obrazom ehffektivnosti upravlyayushchikh sterzhnej pri razlichnykh p ogruzh eniyakh. Opredelyaetsya skhema pod''ema s terzhnej, kotoraya pozvolyaet poluchat' polnuyu moshchnost' prk soblyudenii opredelennykh ogranichenij v temperature obolochek i gaza. Parallel'no byli provedeny izmereniya potoka pri razlichnykh polozheniyakh kompensiruyushchikh sterzhnej i pri razlichnykh zagruzkakh poglotitelej v opredelennykh kanalakh, v zavisimosti ot predvaritel'nykh raschetov v dvukhraehmernom izmerenii. Ehti izmereniya byli polucheny putem aktivatsii tochechnykh detektorov s primeneniem obychnogo metoda otravleniya vozdukha. Pri nekotorykh urovnyakh temperatury (do 140{sup o}C) byli provedeny izmereniya koehffitsientov reaktivnosti i ehffektivnosti reguliruyushchikh sterzhnej. V to zhe vremya putem aktivatsii sootvetstvuyushchikh detektorov (uran, plutonij, lyutetsij, marganets, indij, zoloto) byli provedeny izmereniya koehffitsientov spektra. Dlya izmereniya ehffektivnosti nekotorykh kompensiruyushchikh sterzhnej byl ispol'zovan ostsillyatsionnyj metod. Nakonets, s tselyakh izucheniya zashchity i povrezhdeniya grafita byli provedeny izmereniya potoka bystrykh nejtronov. (author)

  12. ADS-HE: Evaluated Nuclear Data Library up to 1 GeV for 202Hg, 208Pb, 209Bi, 232Th, 235U, 238U, 237Np, 239Pu, 242Am and 245Cm

    International Nuclear Information System (INIS)

    Lopez Aldama, Daniel

    2013-12-01

    Accelerator Driven Systems (ADS) are being developed for power generation and the transmutation of actinide and fission product waste, and well-defined cross-section libraries suitable for their transport calculations are required. Transport of high energy neutrons and protons near the target assembly requires an extension of the library for incident energies up to 1 GeV. An ADS-HE library for incident neutrons on selected target elements has been developed to meet this request, and assist benchmarking studies linked to ADS experiments and design concepts. New evaluations of high-energy data from 20 MeV up to 1 GeV have been carried out by S.G. Yavshits and O.T. Grudzevich (see INDC(NDS)-0615). The ADS- HE library has been prepared from these high-energy evaluations combined with evaluations below 20 MeV selected from the ENDF/B-VII.1, the JEFF-3.1.2 and the JENDL-4u2 libraries. The ADS-HE library was processed in suitable forms for Monte Carlo transport codes used in the analysis of ADS. ADS-HE is freely available from the IAEA Nuclear Data Section, and is readily accessible on the web site: http://www-nds.iaea.org/ads/adshe.html. (author)

  13. Liver Scanning with Colloidal Radiogold; Exploration du foie a l'aide de l'or radioactif colloidal; Issledovanie pecheni pri pomoshchi radioaktivnogo kolloidal'nogo zolota; Exploracion del higado con oro coloidal radiactivo

    Energy Technology Data Exchange (ETDEWEB)

    Donato, L; Becchini, M F; Panichi, S [Centro di Medicina Nucleate, University of Pisa (Italy)

    1959-07-01

    esquemas anatomico y funcional. (author) [Russian] Avtory soobshchayut o svoem opyte v ispol'zovanii kolloidal'nog o zolota Ah{sup 198} dlya issledovaniya pecheni. Dlya polucheniya chetkogo razgranicheniya pecheni ot sosednikh organov i okru-zhayushchikh tkanej obychno trebuetsya doza mechenykh ehlementov, sootvetstvuyushcha ya 2,5 {mu}C/Kg. Vsya protsedura issledovaniya, kotoraya nachinaetsya cherez 30 minut posle vnutrivennogo vspryskivaniya, zanimaet okolo 90 minut pri ispol'zovanii polnost'yu avtomaticheskoj apparatury. Verkhnie i bokovye kontury pecheni obychno luchshe razlichayutsya chem nizhnie. Ispol'zovanie fokusiruyushchi kh kollimatorov (poristogo tipa) znachitel'no uluchshaet poluchaemye rezul'taty. V obychnykh usloviyakh pechen' yavlyaetsya edinstvennym organom, kotoryj chetko viden na ehkrane. V nekotorykh sluchayakh pri splenomegalii i tsirroza pecheni mozhno krome togo videt' i selezenku, veroyatno v svyazi s sokrashcheniem retikulo-ehndotelialyyuj sistemy pecheni. Sudya po priobretennomu avtorami opytu, dannyj metod ves'ma maloehffektive n dlya opredeleniya nebol'shikh metastazov pecheni, kotorye ne izmenyayut ob{sup e}ma i Formy poslednej. Dazhe v sluchayakh podtverzhdennog o operatsiej nalichiya mnozhestva razbrosannykh melkikh uzelkov metastaticheskog o kharaktera issledovaniya ehtim metodom dali neyasnye rezul'taty. Ispol'zovanie radioaktivnog o zolota-198 mozhet v sluchayakh rasseyannogo ili zonal'nogo rasshireniya - nezavisimo ot prichiny - sposobstvovat' vyyasnesho, vyzvany li ehti izmeneniya rasshireniem normal'no funktsioniruyushche j tkani ili zhe nalichem v tkani pecheni patologicheski kh obrazovanij. Ochen' udalnym okazalos' sochetanie radioizotopnog o issledovaniya pecheni s issledovaniem ee konturov rentgenovskimi luchami posle provedeniya pnevmoperitoneuma, tak kak ono pozvolyaet provesti sravnenie mezhdu anatomicheskim i funktsional'ny m sostoyaniem dannogo organa. Kontury, poluchaemye na stsintigrammakh i na rentgenovskikh snimkakh

  14. Economic Criteria Applied to Nuclear Materials Management; Criteres Economiques Applicables a la Gestion des Matieres Nucleaires; Ehkonomicheskie kriterii, primenyaemye pri kontrole i uchete yadernykh materialov; Criterios Economicos Aplicados a la Administracion de Materiales Nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Shelley, W. J.; Kuehn, M. N. [Mallinckrodt Chemical Works, St. Charles, MS (United States)

    1966-02-15

    procedimientos, las tecnicas, el proceso de las operaciones y la forma en que el personal lleva a cabo su cometido. Esta atencion y la voluntad de corregir los. errores permitiran asegurar el equilibrio optimo de los costos y las necesidades. (author) [Russian] Kontrol' i uchet jadernyh materialov dolzhny vsegda igrat' vspomogatel'nuju rol' pri vypolnenii osnovnoj zadachi obrabotki jadernyh materialov, t.e. vyrabotki jenergii ili proizvodstva konechnyh produktov. V svjazi s jetim otvetstvennye za kontrol' i uchet jadernyh materialov dolzhny postojanno reagirovat' na nuzhdy, svjazannye s vypolneniem osnovnoj proizvodstvennoj zadachi, i prisposablivat' neobhodimye sistemy k jetomu processu s tem, chtoby osushhestvljat' kontrol' i uchet jadernyh materialov pri optimal'nyh zatratah. V svjazi s sistemoj kontrolja i ucheta jadernyh materialov neobhodimo tshhatel'no izuchat' rjad faktorov, kotorye vlijajut na ee stoimost'. Razrabotannaja sistema kontrolja dolzhna dopolnjat' proizvodstvennyj process, obespechivaja minimal'nye rashody na soderzhanie personala, analizy i minimal'nyj pereryv proizvodstvennogo processa. Sistema kontrolja dolzhna sochetat'sja s proizvodstvnnymi potrebnostjami dlja togo, chtoby poluchennaja kolichestvennaja informacija bystro postupala licam, osushhestvljajushhim kontrol' za rabotoj. Sistema registracii i vydachi svedenij dolzhna obespechivat' maksimum dopolnitel'nyh dannyh. Ona dolzhna byt' shodnoj s sistemami, kotorye ispol'zujut postavshhiki i potrebiteli, i davat', pri vozmozhnosti, dopolnitel'nuju informaciju, svjazannuju s partijami jadernogo materiala. Dannye,poluchaemye dlja kontrolja za jadernymi materialami, dolzhny byt' tol'ko takimi, kotorye neobhodimye celjah obespechenija togo, chtoby ne bylo nikakih znachitel'nyh poter', hishhenij, nezakonnogo prisvoenija ili ispol'zovanija ne po naznacheniju jadernyh materialov. Dopolnitel'nye dannye dolzhny podvergat'sja tochno takoj zhe neobhodimoj strogoj proverke, kotoroj podvergajutsja dannye

  15. Scanning of Bone Marrow in Haematopoietic Disorders; Gammagraphie de la Moelle Osseuse dans les Troubles Hematopoietiques; Skennirovanie kostnogo mozga pri gematopoehticheskikh narusheniyakh; Exploracion de la Medula Osea en Casos de Trastornos Hematopoyeticos

    Energy Technology Data Exchange (ETDEWEB)

    Kniseley, R. M.; Andrews, G. A.; Edwards, C. L.; Tanida, R. [Oak Ridge Institute of Nuclear Studies, TN (United States)

    1964-10-15

    individualmente las costillas. Cuando la medula esta dilatada se puede visualizar la zona de la rodilla, incluido el espacio articular. Los autores han logrado establecer una correlacion entre estos centelleogramas, los resultados de biopsias por aspiracion y centelleogramas lineales. Como se requieren dosis relativamente elevadas de oro-198, se esta estudiando la posibilidad de emplear otros isotopos. Tambien se esta ensayando un antropogammametro perfeccionado con el fin de facilitar la exploracion. (author) [Russian] Skennirovanie mozhet pomoch' pri ocenke ob{sup e}ma i raspredelenija gematopojeticheskogo kost- nogo mozga -trudnoj zadache dlja aspiracii ili biopsii. S pomoshh'ju skennera s zolotym- vol'framovym fokusirujushhim kollimatorom diametrom 61 mm v Okridzhskoj nacional'noj laboratorii posle vnutrivennogo vvedenija kolloidal'nogo zolota-198 byli polucheny chetkie ochertanija kostnogo mozga, prichem izvestno, chto retikulo-jendotelial'naja funkcija kostnogo mozga sootvetstvuet oblastjam gematopojeza. Skennirovanie provodilos' u pacientov s normal'nym gematopojezom i s raznymi narushenijami krovi, naprimer s ochagovym porazheniem kostnogo mozga, ostroj i hronicheskoj lejkemiej, istinnoj policitemiej, mielofibrozom, mnozhestvennoj mijelomoj i limfomoj. V svjazi s retikulojendotelial'noj aktivnost'ju v pecheni i selezenke izobrazhenie kostnogo mozga zatemneno v central'nom otdele. Ochercheny tela pozvonkov, mezhpozvonochnye diski, kosti taza i dlinnye kosti, a v grudnoj kletke grudina i grudnye pozvonki. Obnaruzheny takzhe ochagovye porazhenija. Otdel'nye rebra ne vidny iz-za dyhatel'nyh dvizhenij. Pri razrastanii kostnogo mozga ego mozhno videt' v kolennoj oblasti, vkljuchaja oblast' sustava . Pojavilas' vozmozhnost' svjazat' jeti skenogrammy s dannymi aspiracionnoj biopsii i s linejnymi diagrammami. V svjazi s tem, chto trebujutsja sravnitel'no bol'shie dozy zolota-198, issleduetsja vozmozhnost' primenenija drugih izotopov. Dlja poluchenija skennogramm, imejushhih bol

  16. The Prying Eye: Ethics of Photojournalism.

    Science.gov (United States)

    Mundt, Whitney R.; Broussard, E. Joseph

    A national sample of journalists, consisting of 700 television news photographers, newspaper photographers, television news directors, newspaper editors, and journalism educators, was asked to evaluate the ethical conduct in eight situations involving alleged invasion of privacy by photography. The respondents found journalistic conduct to be…

  17. UPORABA DIGITALNEGA FOTOAPARATA PRI MULTIMODALNEM NADZORU OKOLJA

    OpenAIRE

    Sedej, Gašper

    2011-01-01

    V diplomskem delu opisujemo sistem, ki smo ga razvili za multimodalni oddaljeni nadzor okolja. Sistem je sestavljen iz več komponent, med katerimi ima ključno vlogo digitalni fotoaparat. Ta je uporabljen za zajemanje žive slike in hkrati tudi fotografij z visoko ločljivostjo. Fotoaparat nadzira računalniški strežnik, ki poganja programsko opremo gPhoto. Video zajemamo preko fotoaparatovega analognega priključka in slikovnega pretvornika, ki pretvori analogni video signal v digitalnega. Strežn...

  18. Pri delezhke Tsheburashki mehh letit po storonam

    Index Scriptorium Estoniae

    2007-01-01

    Vene ärimees ostab ameerika kompaniilt Films by Jove kollektsiooni nõukogude multifilmide (547 filmi) levitamisõigused, et anda need üle loodavale laste telekanalile Venemaal. Lähemalt laste multifilmide lemmikkangelasest Tsheburashkast, mille loojaks kirjanik Eduard Uspenski

  19. Development of Geiger-Mueller counters for operation at high temperatures; Mise au point de compteurs Geiger-Mueller fonctionnant a haute temperature; Razrabotka schetchikov Gejgera-Myullera, rabotayushchikh pri povyshennoj temperature; Contadores Geiger-Mueller que funcionan a temperaturas elevadas

    Energy Technology Data Exchange (ETDEWEB)

    Draghicescu, M [Institut de Physique Atomique, Bucarest (Romania)

    1962-04-15

    Counters of this type are necessary for radioactive logging at great depths; they have to operate normally at temperatures up to 180{sup o}C. In order to preserve their characteristics under such conditions, the work function of the cathode has been improved by a special treatment. Tests have been made on counters with graphite, copper and wolfram cathodes in a glass envelope. The method is simple, and can easily be employed in industry. (author) [French] De tels compteurs sont necessaires pour le sondage radioactif aux grandes profondeurs; ils doivent fonctionner dans des conditions normales jusqu'a la temperature de 180{sup o}C. Afin qu'ils puissent conserver leurs caracteristiques jusqu'a cette temperature, on a agi sur le travail de sortie de la cathode par un traitement adequat. On a fait l'essai sur des compteurs avec cathode de graphite, de cuivre ou de tungstene, dans un ballon de verre. La methode proposee est simple et peut etre appliquee facilement dans l'industrie. (author) [Spanish] Se requiere este tipo de contador para la determinacion de la radiactividad a grandes profundidades; debe ser capaz de funcionar normalmente a temperaturas hasta de 180{sup o}C. A fin de que sus caracteristicas se conserven inalteradas hasta tales temperaturas, se ha modificado la funcion de trabajo del catodo mediante un tratamiento adecuando. Se han ensayado contadores con catodo de grafito, de cobre o de wolframio en un balon de vidrio. El metodo propuesto es simple y puede aplicarse facilmente en la industria. (author) [Russian] Podobnye schetchiki neobkhodimy dlya radioaktivnogo karottazha na bol'shikh glubinakh; oni dolzhny funktsionirovat' v normal'nykh usloviyakh pri temperature do 180{sup o}C. Nakonets, dlya togo, chtoby oni mogli sokhranyat' svoi osobennosti pri ehtoj temperature, bylo obrashcheno vnimanie na rabotu katodnogo vykhoda pri pomoshchi sootvetstvuyushchej obrabotki. Byl proveden opyt na schetchikakh s grafitovym, mednym ili vol'framovym katodom v

  20. The Relationship between Blood Injury and Absorbed Dose in Criticality Accidents; Relations entre la Deterioration du Sang et la Dose Absorbee lors d'Accidents Dus a la Formation d'un Etat Critique; Svyaz' mezhdu velichinoj pogloshchennoj dozy pri avariyakh na reaktorakh, dostigshikh kritichnosti, i narusheniem sostava krovi; Relacion entre las Hemolesiones y la Dosis Absorbida en los Accidentes de Criticidad

    Energy Technology Data Exchange (ETDEWEB)

    Dennis, J. A. [Health Physics and Medical Division, Atomic Energy Research Establishment, Harwell (United Kingdom)

    1964-03-15

    absorbidas por el tronco humano. Examina la relacion entre estas estimaciones de dosis y los valores del diagrama del recuento sanguineo basado en el sistema de valoracion propuesto por N. Wald y G. E. Thoma para las desviaciones con respecto a los indices normales de linfocitos, neutrofilos y plaquetas en la sangre periferica. Demuestra que un parametro basado en la dosis gamma absorbida superficialmente y en la actividad del {sup 24}Na en la sangre concuerda mas satisfactoriamente con el diagrama mencionado y se presta mejor para pronosticar la gravedad de una radiolesion que cualquiera de las estimaciones dosimetricas corrientes. En general, la EBR de las dosis de particulas pesadas de retroceso deducida de estas observaciones armoniza con los valores obtenidos en experimentos realizados con perros. (author) [Russian] Dlja opredelenija dozy, pogloshhennoj poverhnost'ju tela cheloveka,vychisljalis' dozy nejtronnogo i gamma-obluchenij dlja lic, podvergshihsja oblucheniju pri avarijah na reaktorah, dostigshih kritichnosti. Izuchalas' svjaz' mezhdu jetimi dozami i ''profil'nym sostavom krovi'' po metodu M. Uolda i Dzh. Toma dlja otklonenij ot normy limfocitov, nejtrofil'nyh lejkocitov i trombocitov. Pokazano, chto velichina dozy, poluchennaja pri podschete poverhnostnoj pogloshhennoj dozy gamma- obluchenija i urovnja aktivnosti natrija-24 v krovi, v bol'shej stepeni soglasuetsja s profil'nym sostavom krovi i javljaetsja bolee nadezhnym prognosticheskim priznakom pri ocenke ste peni luch ev o go porazhenija, chem standartnye metody ocenki doz obluchenija. Otnositel'naja biologicheskaja jeffektivnost' doz tjazhelyh chastic otdachi, poluchennyh pri jetih nabljudenijah, v obshhem so glasuetsja s velichinami, poluchennymi v rezul'tate jeksperimentov na sobakah. (author)

  1. Compounds Labelled with Low-Energy Gamma-Ray Emitters for Medical Isotope Scanning; Gammagraphie au Moyen de Composes Marques avec des Emetteurs Gamma de Faible Energie; Soedineniya, ispol'zuemye pri meditsinskom izotopnom skennirovanii, mechennye s pomoshch'yu gamma-izluchatelej nizkoj ehnergii; Compuestos Marcados con Emisores Gamma de Baja Energia para la Exploracion Medica Mediante Isotopos

    Energy Technology Data Exchange (ETDEWEB)

    Scheer, K. E.; Zum Winkel, K.; Georgi, M. [Czerny-Krankenhaus der Universitat Heidelberg, Federal Republic of Germany (Germany)

    1964-10-15

    por los tejidos del cuerpo limita la profundidad a que las lesiones pueden ser visualizadas. En organos de grandes dimensiones, como el higado, se evita la superposicion de las radiaciones procedentes de la parte posterior del organo, lo que permite detectar mejor las lesiones superficiales. El. emisor,gamma de baja energia mas importante es el {sup 125}I. Para la exploracion de la tiroides se utiliza en forma de yoduro. El Rosa Bengala marcada con {sup 125}I es un compuesto adecuado para la exploracion del higado. Tambien puede utilizarse albumina desnaturalizada por el calor, marcada con {sup 125}I. Para la exploracion del rinon se ha comprobado que el hipuran marcado con {sup 125}I da buenos resultados cuando se inyecta por via intramuscular con hialuronidasa a fin de lograr un nivel uniforme de radiactividad en este organo. Otro emisor gamma de baja energia muy util para la exploracion medica es el {sup 197}Hg que puede utilizarse en forma de cloruro para la exploracion de los rinones y el bazo. Deben tomarse precauciones especiales para evitar la superposicion del rinon y el bazo. La exploracion da mejores resultados si se utiliza {sup 197}Hg marcado con neohidrina. Este compuesto puede emplearse tambien para la localizacion de tumores del cerebro. Los autores presentan centelleogramas tipicos de tumores de la tiroides, del higado, del bazo, del rinon y del cerebro obtenidos con emisores gamma de baja energia y con nuclidos y compuestos tradicionales, y examinan las ventajas que ofrecen los primeros. (author) [Russian] Gammaizluchateli nizkoj jenergii imejut osobye preimushhestva pri ispol'zovanii ih dlja medicine - skogo scintilljacionnogo skennirovanija po dvum prichinam: 1. Svincovaja zashhita kollimatorov znachitel'no jeffektivnee. Pojetomu mozhno primenjat' tonkostennye kollimatory s mnogokratnoj fokusirovkoj, dobivajas' pri jetom naibol'shego geometricheskogo razreshenija, i v svjazi s jetim- vozmozhnosti obnaruzhenija nebol'shih porazhenij. 2. Pogloshhenie

  2. El silenciamiento de la proteína priónica celular (PrPC mediante RNA de interferencia (siRNA reduce la infección por HSV-1 y HSV-2 en células SK-SY5Y

    Directory of Open Access Journals (Sweden)

    Elizabeth Ortega-Soto

    2012-01-01

    Full Text Available Las encefalopatías espongiformes transmisibles (EETs son enfermedades neurodegenerativas fatales que afectan a humanos y ciertas especies animales. La hipótesis más aceptada indica que el agente infeccioso, denotado como prion y compuesto principalmente por la Proteína Priónica Scrapie (PrPSc, corresponde a una conformación anormal de una proteína codificada por el huésped denominada Proteína Priónica Celular (PrPC, cuya función es aún desconocida; sin embargo, la expresión ubicua de PrPC así como su elevado grado de conservación entre especies, sugieren un papel importante para esta proteína. En este trabajo se detectó a la PrPC en diferentes tipos celulares incluyendo un cultivo primario de células de peces (Tilapia, Oreochromis spp.. Además, basándonos en la secuencia de la PrPC humana, se diseñó un RNA de interferencia (siRNA con el fin de silenciar el gen PRNP en células neuronales SK-SY5Y. El siRNA diseñado inhibió la expresión de PrPC a lo largo de las 96 h post-transfección y las células silenciadas fueron menos susceptibles a la infección por HSV-1 y HSV-2, en comparación con células no transfectadas con el siRNA.

  3. Scanning Techniques for Brain-Tumour, Localization; Techniques Scintigraphies pour la Iocalisation des Tumeurs Cerebrales; Tekhnika skennirovaniya pri opredelenii lokalizatsii opukholej mozga; Tecnicas Centelleograficas para la Localizacion de Tumores Cerebrales

    Energy Technology Data Exchange (ETDEWEB)

    Duggan, M. H.; Brice, J.; Jones, E.; Mallard, J. R.; Myers, M. L. [Department Of Medical Physics, Postgraduate Medical School, Hammersmith Hospital, London (United Kingdom)

    1964-10-15

    facilitar la percepcion de anomalias no muy alejadas de los limites de deteccion en sistemas detectores moviles. En la memoria se estudia la posibilidad de utilizar analizadores multicanales para aplicar esas tecnicas y permitir al mismo tiempo un nuevo y util procedimiento de presentacion del centelleograma tanto en los sistemas moviles como en los estacionarios. (author) [Russian] Ustanovka dlja cvetnogo skennirovanija (Annotacija SM-51/25) ispol'zovalas' dlja sken- nirovanija dvuh vidov opuholej mozga: v odnom sluchae po pozitronnomu izlucheniju As{sup 74} , v drugom-po gamma-izlucheniju mechennogo J{sup 131} al'bumina s ispol'zovaniem fokusirujushhego kollimatora. Sravnivajutsja rezul'taty jetih dvuh vidov issledovanij. Mjet'jus,pri issledovanii opuholej u krys,pokazal, chto limonnokislyj Bi'uti javljaetsja osobenno udobnym materialom dlja opredelenija lokalizacii opuholej mozga, i v nastojashhee vremja provoditsja tret'ja serija klinicheskih issledovanij s primeneniem jetogo materiala, ispol'zovaniem gamma-detektirovanija i fokusirujushhego kollimatora. Privodjatsja predvaritel'nye rezul'taty jetih issledovanij . Fokusirujushhie kollimatory, primenennye vmeste s gamma-izluchajushhimi izotopami, imejut glubokij geometricheskij fokus; polucheny izoschetnye harakteristiki dlja tochechnyh istochnikov, ne zavisjashhie ot glubiny do 20sm. Jeksperimental'nye rezul'taty, poluchennye dlja celogo rjada kollimatorov, javilis' osnovoj dlja konstrukcii takih kollimatorov s zadannoj specifikaciej. Stacionarnoe detektornoe skennirovanie u bol'nyh s opuholjami mozga bylo provedeno s pomoshh'ju gamma-kamery s vosproizvodjashhim zapominajushhim ustrojstvom. Preimushhestva takoj apparatury zakljuchajutsja v bol'shej chuvstvitel'nosti i bolee bystroj vizualizacii kartiny raspredelenija radioaktivnosti, chto daet vozmozhnost' provedenija issledovanij v dinamike. K problemam, voznikajushhim v svjazi s jetoj apparaturoj, otnosjatsja trudnost' markirovki anatomicheskih struktur i

  4. The Use Of {sup 15}N in the Study of Nitrogen Uptake and Metabolism in Plants; Primenenie azota-15 pri izuchenii vzaimodejstviya azotnykh udobrenij s pochvoj i usvoeniya ikh rasteniyami

    Energy Technology Data Exchange (ETDEWEB)

    Gyrbuchev, I.; Dinchev, D. [Institut Pochvovedenija Im.N. Pushkarova, Sofija (Bulgaria)

    1968-07-01

    sledujushhih svobodnyh aminokislotah: arginine, gistidine, lizine i amidoasparagine. V svjazannyh aminokislotah - alanine, treonine, serine i glicine - soderzhalos' naibol'shee kolichestvo 15N. Primenenie fosfora uvelichivalo kolichestvo azota v aminokislotah. Ustanovleno, chto oborot azota byl samym bol'shim v hlorofille i konstitutivnyh belkah. Pri issledovanii kachestva pshenichnyh zeren bylo ustanovleno, chto naibol'shee kolichestvo azota bylo obnaruzheno v gljutenine, zatem vo frakcijah ostatochnogo azota, prolamina i vodorastvorimyh azotnyh soedinenijah. Naimen'shee kolichestvo bylo obnaruzheno v albumine i globuline.

  5. Report of the PRI biofuel-ethanol; Rapport du PRI biocarburant-ethanol

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This evaluation report presents three research programs in the framework of the physiological behavior of the yeast ''Saccharomyces cerevisiae'', with high ethanol content. These studies should allowed to select an efficient yeast for the ethanol production. The first study concerns the development of an enzymatic process for the hydrolysis and the fermentation. The second study deals with the molecular and dynamical bases for the yeast metabolic engineering for the ethanol fuel production. The third research concerns the optimization of performance of microbial production processes of ethanol. (A.L.B.)

  6. Report of the PRI biofuel-ethanol; Rapport du PRI biocarburant-ethanol

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This evaluation report presents three research programs in the framework of the physiological behavior of the yeast ''Saccharomyces cerevisiae'', with high ethanol content. These studies should allowed to select an efficient yeast for the ethanol production. The first study concerns the development of an enzymatic process for the hydrolysis and the fermentation. The second study deals with the molecular and dynamical bases for the yeast metabolic engineering for the ethanol fuel production. The third research concerns the optimization of performance of microbial production processes of ethanol. (A.L.B.)

  7. Detennination Qf Optimuni on-fann Seed Pri~ing Time for Maize ...

    African Journals Online (AJOL)

    maize seed to on-far111 priming is an important development which can be used to improve ... Key words: semi-arid: crop establishment; sorghum; maize: on-farm seed priming; Zimbapwe. ... faster growth and higher yield after seed prim-, ing.

  8. Interactions of {sub 82}Pb{sup 208} nuclei with energy 158 GeV per nucleon with photoemulsion nuclei; Vzaimodejstviya yader {sub 82}Pb{sup 208} s ehnergiej 158 Gev na nuklon s yadrami fotoehmul'sii

    Energy Technology Data Exchange (ETDEWEB)

    Adamovich, M I; Andreeva, N P; Bubnov, V I; Gajtinov, A Sh; Kanygina, Eh K; Musaeva, A K; Sejtimbetov, A M; Skorobagatova, V I; Filippova, L N; Chasnikov, I Ya [Fiziko-tekhnicheskij Inst. Ministerstava Nauki i Vysscego Obrazovaniya Respubliki Kazakhstan, Almaty (Kazakhstan)

    1999-07-01

    In this report there are experimental data on {sub 82}Pb{sup 208} nuclei (158 GeV) interaction with photoemulsion nuclei. The said data are compared to the similar ones for {sub 79}Au{sup 197} nuclei with less energy (10,7 A GeV). Stack of nuclear emulsion was irradiated with the beam of nuclei {sub 82}Pb{sup 208} at SPS of CERN. Events search was done along the primary nucleus trace. Pb nucleus average path length happened to be {lambda}=(3,8{+-}0,1) cm, this virtually coincides with the one calculated by Brandt and Peters formula (3,9 cm). Secondary particles were identified into s (storm), g (knock-on protons) and b- particles (target nucleus fragments), as well as into nucleus-bullet fragments with different charges (Z=1,2,{>=}3). This allowed obtaining event distribution by multiplicity of these particles (n{sub s}, n{sub g}, n{sub b}) and fragments (n{sub z=1,2,{>=}}{sub 3}), calculation of average values by multiplicity (see table), finding correlation of characteristics. >From the table it's clear that when the energy increases increases 2,5 times where as insignificantly decreases and doesn't change.

  9. The Subcritical Assembly for High-Temperature Use; Assemblage Sous-Critique Pour Emploi a Haute Temperature; K voprosu o podkriticheskoj sborke dlya ispol'zovaniya pri vysokikh temperaturakh; Conjunto Subcritico para Temperatura Elevada

    Energy Technology Data Exchange (ETDEWEB)

    Sakurai, Y.; Sekiya, T.; Suita, T. [Osaka University (Japan); Hishida, H.; Hamada, H.; Nagashima, K. [Sumitomo Atomic Energy Industries Group (Japan)

    1964-04-15

    vysokotemperaturnoj oblasti primenjaetsja gelij. Jeti vysokotemperaturnye gazovye petli proektirujutsja takim obrazom, chto ih mozhno ispol'zovat' dlja issledovanija voprosov neposredstvennogo prevrashhenija atomnoj jenergii v jelektricheskuju. Sborki osnashhajutsja sistemami upravlenija i kontrol'no-izmeritel'nymi sistemami podobno nebol'shim atomnym reaktoram. V nastojashhee vremja izuchaetsja jeksperimental'nyj metod opredelenija laplasiana sistemy i issleduetsja nailuchshaja shema raspolozhenija istochnika impul'snyh nejtronov i detektorov. Dalee, razrabatyvaetsja unikal'nyj metod izmerenija plotnosti potokov nejtronov pri vysokoj temperature. Nakonec, predpolagaetsja izuchit' vopros o vlijanii vysokoj temperatury na parametry reaktora. (author)

  10. Direct Measurement of Tritium in Biological Materials with the Liquid Scintillation Counter; Determination quantitative directe du tritium dans les substances biologiques, au moyen de compteurs a scintillations a liquides; Neposredstvennoe izmerenie kolichestva tritiya v biologicheskikh materialakh pri pomoshchi zhidkogo stsintillyatsionnogo schetchika; Determinacion cuantitativa directa del tritio en sustancias biologicas mediante contadores de centelleador liquido

    Energy Technology Data Exchange (ETDEWEB)

    Halvorsen, K [Institutt for Atomenergi, Kjeller, Lillestroem (Norway)

    1962-01-15

    muestras de tejidos de raton a los que se habia inyectado previamente timidina marcada con tritio. Despues de inyectar al raton una dosis del orden de 1 {mu}c de timidina tritiada por gramo de peso corporal, se pudieron seguir durante un mes las transformaciones metabolicas de la timidina incorporada al acido desoxirribonucleico (DISIA) de los distintos tejidos. (author) [Russian] V literature uzhe soobshchalos' o sposobakh izmereniya kolichestva tritiya v tkanyakh zhivotnykh i v izolirovannykh srezakh tkanej. Odnako pri vsekh opisyvaemykh rabotakh dlya otscheta impul'sov obraztsov primenyalsya zhidkostnyj stsintillyatsionnyj spektrometr sovpadenij. Pri vypolnenii nastoyashchej raboty dlya izmerenij byl ispol'zovan zhidkostnyj stsintillyatsionnyj schetchik s odnim fotoehlementom. Issledovalis' glavnym obrazom neposredstvennoe rastvorenie tkanej zhivotnykh v giamine 10-KH i otschet impul'sov vzvesi liofilirovannoj tkani v stsintilliruyushchikh gelyakh. Razlichnye tkani, kak naprimer, pechen', kishechnik, krov' i kozha mogut byt' neposredstvenno rastvoreny v giamine i aktivnost' ikh izmerena s tochnost'yu do 10-15 protsentov. Budut obsuzhdeny metody vvedeniya popravki na gashenie i nekotorye yavleniya fosforestsentsii, poskol'ku oni vliyayut na otschet impul'sov v schetnom ustrojstve s edinym fotoehlementom. KHotya chuvstvitel'nost' ehtogo metoda predstavlyaetsya neskol'ko men'shej, chem pri ispol'zovanii schetchika sovpadenij, odnako ehtot metod udovletvoritelen dlya mnogikh vidov primenenij. Predstavlyaemaya rabota byla provedena na obraztsakh tkanej myshi posle predvaritel'noj in{sup e}ktsii mechennogo tritiem timidina. Pri vpryskivanii v mysh' dozy priblizitel'no v 1 mikrokyuri tritirovannogo timidina na gramm vesa ee tela, metabolicheskaya sud'ba timidina, pogloshchennogo deoksiribonukleinovoj kislotoj razlichnykh tkanej, mogla byt' proslezhena v techenie tselogo mesyatsa. (author)

  11. Inelastic scattering of 9Be of 27 MeV/A to giant resonances

    International Nuclear Information System (INIS)

    Lebrun, D.; Buenerd, M.; Bini, M.; Harvey, B.G.; Legrain, R.; Mahoney, J.; Symons, T.J.M.; Van Bibber, K.

    1980-07-01

    Inelastic scattering spectra have been measured with 245 MeV incident energy 9 Be ions, on 208 Pb target. They show large excitation of the 208 Pb giant quadrupole resonance. DWBA calculations are reported and compared with the data

  12. Metodologija postavljanja diferencijalnih jednačina pri istraživanju dinamičkih parametara konstrukcije lansirne rampe na vozilu točkašu / Methodology make of differential equations at investigation of dynamic parameters of constructions of launcher on vehicle

    Directory of Open Access Journals (Sweden)

    Vlado P. Đurković

    2007-07-01

    Full Text Available U radu se određuju optimalni parametri konstrukcije lansirne rampe: položaj tačke vešanja hidrocilindra na rampi, dužina i materijal rampe, koeficijent viskoznog trenja ulja u hidrocilindru, koeficijent krutosti lansirne rampe i hidrocilindra, poprečni presek rampe, itd. Radi toga postavlja se mehanički model sa tri stepena slobode kretanja i odgovarajući model u vidu sistema od tri nelinearne diferencijalne jednačine drugog reda. Numeričkom analizom dobijenog matematičkog modela (primenom programskog jezika Compaq Visual Fortran, Version 6.5 dolazi se do optimalnosti pojedinih parametara. Dobijeni rezultati, predstavljeni u grafičkoj formi, mogu da budu veoma korisni projektantima raketnih lansera, kako stabilnih, tako i mobilnih, pri razvoju novih konstrukcija i modifikaciji postojećih. / This paper determines optimal construction parametrics of a missile launcher place of hydro-cylinder on launcher, length and material of ramp of launcher coefficient of the viscosity of friction oil in hydro-cylinder, coefficient of stiffness of launcher and hydro-cylinder, cross-section of launcher etc. In this purpose appointment mechanical model with three degrees of freedom motion and analogous model of system of three nonlinear differential equation second order. Numerical analysis obtained mathematical model (programming with language Compaq Visual Fortran, Version 6.5 coming to optimal parameters. Obtained results that are presented in graphical shapes can be very useful for designing stable and mobile missile launchers, both for development of new constructions and modification of existing structures.

  13. Plasma Containment and Stability in a Megajoule Theta-Pinch Experiment; Confinement et Stabilite du Plasma dans un Dispositif a Striction Azimutale de un Megajoule; Uderzhanie i ustojchivost' plazmy pri provedenii ehksperimenta s' megadzhoulevym teta-pinchem; Confinamiento y Estabilidad del Plasma en un Experimento de Estriccion Azimutal de 1 MJ

    Energy Technology Data Exchange (ETDEWEB)

    Bodin, H. A.B.; Green, T. S.; Newton, A. A.; Niblett, G. B.F.; Reynolds, J. A. [United Kingdom Atomic Energy Authority, Culham Laboratory, Abingdon, Berks. (United Kingdom)

    1966-04-15

    tecnicas: las principales son la interferometrta optica para evaluar el numero total de particulas capturadas, un analisis de la emision en la zona continua del espectro visible para obtener la densidad de lineas en funcion de la posicion axial, y el empleo de microsondas piezoelectricas de presion para medir el tamaflo de la abertura de perdidas. Los resultados muestran que el plasma sufre difusion del campo magnetico en las fases iniciales y enfriamiento de los electrones por irradiacion debida a impurezas o por conduccion termica a lo largo de las lineas de fuerza. Como consecuencia, el valor {beta} del plasma desciende a 0,5 aproximadamente, a la densidad magnetica maxima, con lo que se agrandan las aberturas magneticas de los extremos de la bobina, originando asi el escape axial del plasma. Los principales problemas aun pendientes de solucion se refieren al perfeccionamiento de un dispositivo de precalentamiento que permita obtener un plasma de temperatura mas elevada con un valor {beta} proximo a la unidad, y a la reduccion de la velocidad de perdida de energia delos electrones. (author) [Russian] Pri provedenii poslednih jeksperimentov po polucheniju vysokotemperaturnoj plazmy na tetatrone byla ispol'zovana bystraja megadzhoulevaja batareja kondensatorov. Odnozahodnaja katushka, dlinoj 200 sm i diametrom 10 sm, sozdaet pole intensivnost'ju 76 kg s poluperiodom 12 mksek. Dejterievyj gaz ispol'zuetsja pri nachal'nyh davlenijah v diapazone 10-50 militor. i predvaritel'no ioniziruetsja aksial'nym tokom. Posledujushhee smeshhenie plazmy k stenkam kvarcevoj razrjadnoj trubki ustranjaetsja v rezul'tate umen'shenija izgiba uderzhivajushhih magnitnyh silovyh linij s ispol'zovaniem linii parallel'nogo polosnogo propuskanija mezhdu katushkoj i kollektorom. Budet obsuzhden vopros o proishozhdenii krugovogo dvizhenija plazmy s maloj amplitudoj vokrug central'noj osi ravnovesija, tak nazyvaemogo javlenija ''kachanija''. Obshhie osobennosti razrjada analizirovalis' putem

  14. The adsorption of hydrogen on a molecular sieve at -196{sup o}C and the observation of an isotope effect; Adsorption d'hydrogene sur un tamis moleculaire a -196{sup o}C et observation d'un effet isotopique; Absorbtsiya vodoroda na molekulyarnom fil'tre pri -196{sup o} i nablyudenie rezul'tatov dejstviya izotopov; Adsorcion de hidrogeno en un tamiz molecular a -196{sup o}C y observacion de un efecto isotopico

    Energy Technology Data Exchange (ETDEWEB)

    Duncombe, W G [Wellcome Research Laboratories, Beckenham, Kent (United Kingdom)

    1962-03-15

    adsorbio en el tamiz molecular cerca del 99 % del hidrogeno inicial antes de comenzar la desorcion por bombeo. Por lo tanto, parece probable que el considerable fraccionamiento observado tenga lugar principalmente durante la desorcion y que el efecto carezca de importancia cuando el tamiz se emplea para manipular pequenos volumenes de isotopos del hidrogeno ya que, por lo general, la desorcion total se efectuara por calentamiento. (author) [Russian] Ispytyvalsya molekulyarnyj fil'tr Linde 4 A v kachestve vozmozhnogo sredstva obrashcheniya s nebol'shimi ob{sup e}mami izotopov vodoroda v vakuume, vmesto primenyayushchegosya v nastoyashchee vremya nasosa Toiplera. Davlenie ravnovesiya (P) izmeryaetsya razlichnymi ob{sup e}mami (V) vodoroda, absorbiruemogo odnim grammom fil'tra pri temperature -196{sup o}. EHksperimenty s aktivirovannym drevesnym uglem pokazyvayut preimushchestvo fil'tra kak absorbenta vodoroda. Odin gramm fil'tra v sisteme s ob{sup e}mom v 500 ml absorbiruet okolo 97 % odnogo ml obraztsa vodoroda. Absorbtsiya neznachitel'na pri temperature -78{sup o}, i desorbtsiya yavlyaetsya kolichestvennoj i b'kpro protekaet pri komnatnoj temperature. Vozmozhnost' rezul'tatov dejstviya izotopa izuchalas' putem absorbirovaniya izmeryaemykh ob{sup e}mov tritiya (5 millikyuri/mol') pri ravnomernom davlenii okolo 5 mm, pri ehtom proiskhodilo vykachivanie sistemy v periode do 15 minut i izmerenie ob{sup e}ma ostatochnogo vodoroda. Poslednij prevrashchalsya kolichestvenno v vodu, zatem v butan i gaz. Udel'naya aktivnost' byla vsegda vyshe, chem aktivnost' tritiya, kotoryj prokhodil 10 tsiklov absorbtsii i desorbtsii bez promezhutochnogo vykachivaniya s tem, chtoby ne bylo nikakikh chistykh poter' gaza. EHto imelo takuyu zhe udel'nuyu aktivnost', kak u neobrabotannogo tritiya, vzyatogo iz rezervnoj kolby. Bylo obnaruzheno, chto logarifm (ostatochnyj ob{sup e}m/nachal'nyj ob{sup e}m) proportsionalen 1/logarifm (ostatochnaya udel'naya aktivnost'/ nachal'naya udel'naya aktivnost') v

  15. Nuclear geophysics in prospecting for ore and coal deposits; Geophysique nucleaire et prospection des gisements de charbon et autres mineraux; Yadernaya geofizika pri razvedke rudnykh i ugol'nykh mestorozhdenij; Geofisica nuclear u prospeccion de yacimientos de carbon y otros minerales

    Energy Technology Data Exchange (ETDEWEB)

    Bulashevich, Yu P; Voskobojnikov, G M; Muzyukin, L V

    1962-01-15

    captura de neutrones termicos del boro hace posible determinar estratos boriferos en la zona del sondeo empleando los metodos E.G.N. y E.N.N. La influencia del agua se elimina mediante sondeos inversos. Este metodo, asi como otros sistemas de exploracion por activacion neutronica, han sido aplicados tambien en diversos yacimientos de cobre, manganeso, aluminio y otros minerales. La exploracion por activacion continua esta indicada cuando el periodo de semi [Russian] Na rudnykh i ugol'nykh mestorozhdeniyakh metody yadernoj geofiziki primenyayutsya glavnym obrazom pri karotazhe razvedochnykh skvazhin. Na rudnykh i ugol'nykh mestorozhdeniyakh Sovetskogo Soyuza nakhodyat shirokoe proizvodstvennoe primenenie sleduyushchie vidy radioaktivnogo ili yadernogo karotazha (RK): plotnostnoj ili gamma-gamma karotazh (GGK) s istochnikom izlucheniya Co{sup 60}, selektivnyj gamma-gamma karotazh (SGGK) s istochnikom myagkogo izlucheniya tipa S75, nejtron-nejtronnyj karotazh (NNK) i nejtronnyj gamma karotazh s Ro-Ve istochnikom nejtronov, akti- vatsionnyj, v chastnosti nepreryvnyj, karotazh s tem zhe istochnikom, a takzhe foto-nej- tronnyj karotazh s gamma-izluchatelem Sb{sup 124}. Osnovnaya zadacha RK na rudnykh mestorozhdeniyakh - vydelenie rudnykh zon v razreze skvazhin, chto sokrashchaet intervaly oprobovaniya, i orientirovochnaya otsenka soderzhaniya poleznogo komponenta in situ. Na ugol'nykh mestorozhdeniyakh RK reshaet zadachu opredeleniya glubiny zaleganiya, moshchnosti i stroeniya ugol'nykh plastov. ' Metody GGK i SGGK osnovany na registratsii rasseyannogo gamma-izlucheniya istochnika. Pri dostatochnoj zhestkosti izlucheniya istochnika i slaboj chuvstvitel'nosti indikatora intensivnost' rasseyannogo izlucheniya zavisit tol'ko ot plotnosti porody i rasstoyaniya mezhdu istochnikom i indikatorom. EHto sluchaj GGK, kotorym ugol'nye plasty vydelyayutsya po maksimumam rasseyannogo izlucheniya. V SGGK sushchestvenna registratsiya myagkoj chasti spektra rasseyannogo izlucheniya

  16. The Formation of Polymeric Products in Reactions of Polyvalent Recoil Atoms; Formation de Polymeres lors de Reactions Provoquees par des Atomes de Recul Polyvalents; Obrazovanie polimernykh produktov pri reaktsiyakh polivalentnykh atomov otdachi; Formacion de Polimeros en las Reacciones de Atomos de Retroceso Polivalentes

    Energy Technology Data Exchange (ETDEWEB)

    Dzantiev, B. G.; Stukan, R. A.; Shvedchikov, A. P.; Shishkov, A. V. [Institut Himicheskoj Fiziki AN SSSR, Moskva, SSSR (Russian Federation)

    1965-04-15

    mechenyh polimernyh produktov v processe himicheskoj stabilizacii atomov otdachi sery-35 i ugleroda-14, poluchajushhihsja po jadernym reakcijam Cl{sup 35} /n, p/S{sup 35} i N{sup 14}/n, p/C{sup 14} v gazovoj i zhidkoj fazah. Mozhno predpolozhit', chto v processe stabilizacii gorjachie atomy ugleroda obrazujut metilenovye biradikaly, kotorye po svoej sposobnosti vstupat' v reakciju vo mnogom napominajut povedenie atomarnoj sery. Issledovanija provodilis' kak dlja parafinovyh (CH{sub 4}, C{sub 2}H{sub 6}), tak i dlja ciklicheskih (ciklogeksan, ciklogeksen, benzol) uglevodorod. Oblucheniju podvergalis' binarnye sistemy uglevodorod-datchik gorjachih atomov S{sup 35} i C{sup 14}. V kachestve poslednego ispol'zovalis' soedinenija CCI{sub 4}, HCl i ammiak. Obluchenie provodilos' na reaktore tipa IRT-1000 pri potoke teplovyh nejtronov 10{sup 11} - 10{sup 12} neJtron/cm{sup 2}sek. Pokazano, chto dlja razlichnyh soedinenij v zhidkoj faze do 60-90% sery-35 stabilizuetsja v forme polimera, vyhod kotorogo jekstremal'no zavisit ot sostava, prohodja cherez maksimum pri sootnoshenii komponentov, blizkom k jekvimolekuljarnomu. V gazovoj faze vyhod polimera sostavljaet 30 - 40% ot obshhej aktivnosti. Metodom radiohromatografii na bumage ustanovleno, chto mechenye polimernye produkty imejut slozhnyj sostav i predstavljajut soboj smes' dvuh kachestvenno otlichnyh tipov soedinenij, vyhod kotoryh po-raznomu menjaetsja v zavisimosti ot sootnoshenija komponentov. Uvelichenie vremeni obluchenija privodit k rostu vyhoda mechenogo polimera. V sluchae zhidkofaznoj sistemy C{sub 6}H{sub 12}-CCl{sub 4} molekuljarnyj ves S{sup 35}-soderzhashhego polimera, opredeljalsja metodom diffuzii iz kapilljara i okazalsja ravnym 5000 dlja polimera odnogo tipa i 500 - 1000 dlja drugogo. Obrazovanie vysokokipjashhego mechenogo produkta nabljudalos' takzhe pri obluchenii chistogo CCI{sub 4}. Analogichnye opyty provodilis' v sisteme jetilen -ammiak v gazovoj faze pri vysokom davlenii. Pokazano, chto v jetom sluchae

  17. Materials Control in the Fabrication of Enriched Uranium Fuels; Controle des Matieres au Cours de la Fabrication des Combustibles a Base d'Uranium Enrichi; Uchet materialov pri izgotovlenii topliva na obogashchennom urane; Control de Materiales en la Elaboracion de Combustibles de Uranio Enriquecido

    Energy Technology Data Exchange (ETDEWEB)

    Cardwell, Jr., R. G. [Oak Ridge National Laboratory, Oak Ridge, TN (United States)

    1966-02-15

    densidad. La manipulacion de la chatarra tuvo una importante influencia en el balance de los materiales que confirmo el contenido de combustible y aseguro una buena contabilizacion. Los procedimientos de manipulacion y registro, y en particular los metodos de determinacion de las partidas y de marcacion fisica, se formularon de tal manera que constituyeron una buena ayuda para el fabricante en lo que respecta al control de la criticidad. (author) [Russian] Usilennaja dejatel'nost' v oblasti tehnologii teplovydeljajushhih jelementov, provodivshajasja v Okridzhskoj nacional'noj laboratorii na protjazhenii poslednih 15 let, privela k vyrabotke racional'nyh tehnologicheskih processov i metodov ucheta obogashhennyh materialov, kotorye sejchas shiroko primenjajutsja pri izgotovlenii teplovydeljajushhih jelementov v promyshlennom masshtabe. V hode proektirovanija i izgotovlenija prototipov teplovydeljajushhih jelementov dlja zapuska reaktora dlja ispytanija materialov, reaktora s massovoj zashhitoj ili {sup b}assejnovogo tipa{sup ,} kompaktnogo jenergeticheskogo reaktora voennogo obrazca, reaktora s bashennoj zashhitoj, pokazatel'nogo reaktora dlja Zhenevskoj konferencii, izotopnogo reaktora s potokom bol'shoj intensivnosti i jeksperimentol'nogo reaktora s gazovym ohlazhdeniem byli vyrabotany i prinjaty v kachestve ustanovlennyh norm nadezhnye metody obrashhenija s obogashhennym toplivom v vide splavov, suspenzii ili okisej. Nakoplennyj opyt posluzhil osnovoj dlja dannogo doklada, v kotorom podcherkivajutsja problemy ucheta materialov i ih razreshenie pri izgotovlenii razlichnyh sostavnyh chastej teplovydeljajushhih jelementov razlichnyh tipov na obogashhennom urane. Osnovnymi zadachami pri vyrabotke horoshej sistemy ucheta materialov javljajutsja: 1) sokrashhenie chisla edinic podotchetnogo materiala; 2) vyrabotka otdel'nyh uchetnyh dokumentov dlja kazhdoj vazhnoj stadii izgotovlenija i sostavlenie ih svodki sposobom, pozvoljajushhim s naimen'shej zatratoj truda vyjavljat' mesta

  18. Study of reactions of metals with sulphur and phosphorus compounds by pulsed temperatures; Etude des reactions entre metaux et composes du soufre et du phosphore au moyen de brusques hausses de temperature; Issledovanie reaktsii metallov s soedineniyami sery i fosfora pri regulyarnykh izmeneniyakh temperatury; Estudio de reacciones entre metales y compuestos de azufre y de fosforo empleando impulsos de temperatura

    Energy Technology Data Exchange (ETDEWEB)

    Campbell, R B; Grunberg, L [National Engineering Laboratory, East Kilbride, Glasgow (United Kingdom)

    1962-01-15

    , los autores han tenido en cuenta la estructura de los materiales empleados y los procesos de difusion a los que se debe el progreso de la reaccion una vez iniciada esta. (author) [Russian] Protivoiznosnoe dejstvie sernykh i fosfornykh soedinenij, kotorye obychno dobavlyayutsya k mashinnym maslam, zavisit ot khimicheskikh reaktsij s metallicheskimi poverkhnostyami shesterenok. EHti reaktsii imeyut mesto kak pri osnovnoj temperature masel (primerno 100 Degree-Sign C), tak i pri vysokikh temperaturakh (priblizitel'no 600 Degree-Sign C) v techenie nebol'shogo promezhutka vremeni, kogda zubtsy shesterenok vstupayut vo vzai-modejstvie pod nagruzkoj. Temperaturnye izmeneniya sozdavalis' v apparate, v kotorom korotkie impul'sy ehlektrotoka ispol'zovalis' dlya nagrevaniya metallicheskikh provodov, pogruzhennykh v mineral'noe maslo, soderzhashchee v rastvore mechenye soedineniya sery-35 i fosfora-32. Zameryalas' voznikavshaya v provodakh radioaktivnost'. Stepen' reaktsii opredelyalas' kak funktsiya temperatury i vremeni. Rezul'taty reaktsii vyrazhalis' posredstvom osnovnykh zakonov kinetiki. Izucheniyu podverglis' voprosy izmeneniya skorosti reaktsii v zavisimosti ot nalichiya drugikh sostavov v rastvore. Bylo takzhe opredeleno vliyanie predvaritel'no obrazovannykh pokrytij poverkhnosti, soderzhashchikh seru, fosfor, khlor i/ili kislorod. Dlya ob{sup y}asneniya rezul'tatov raboty ispol'zuyutsya dannye o strukture materialov, a takzhe rassmatrivayutsya protsessy diffuzij tam, gde reaktsii vykhodili za svoi nachal'nye stadii. (author)

  19. Fyzioterapia pri paréze nervus facialis

    OpenAIRE

    DANANAJOVÁ, Lucia

    2011-01-01

    The subject of this bachelor?s thesis is physiotherapy for peripheral paralysis of a facial nerve (nervus facialis), specifically Bell?s palsy. This is a paralysis of the mimetic muscles affecting an entire half of a face. It is typified by a rapid onset, usually on waking in the morning, and normally follows a predictable course. The most notable objective symptom is a marked facial asymmetry together with a complete change in the facial expression. For most patients prognosis is good, many ...

  20. EPR - spektroskopiya pri ozhirenii i metabolicheskom sindrome u zhenshchin

    Directory of Open Access Journals (Sweden)

    A G Maksina

    2001-03-01

    Full Text Available Цель. Исследовать изменения в структуре мембран эритроцитов крови при ожирении в сочетании с другими нарушениями, характерными для метаболического синдрома. Материалы и методы. Обследованы 42 пациентки в возрасте от 23 до 50 лет с избыточной массой тела и ожирением и контрольная группа (12 женщин с применением метода спинового зонда. Результаты. У пациенток и избытком массы тела и ожирением показатель мембранной упорядоченности фосфолипидов был выше, чем в контроле. . Изменение параметра S в цельной крови и сыворотке более выражено по сравнению с таковым в эритроцитах. При ожирении с сопутствующей артериальной гипертензией параметр упорядоченности достоверно выше (р

  1. KULTURNE RAZLIKE PRI TRGOVANJU MED SLOVENIJO IN KITAJSKO

    OpenAIRE

    Potrpin, Tea

    2012-01-01

    V diplomski nalogi smo predstavili pojme kulture, medkulturnih razlik ter osnove poslovnega bontona. Na kratko smo predstavili splošne znamenitosti Slovenije in Kitajske, in njune gospodarske ter zgodovinske značilnosti, največ poudarka pa smo namenili poslovnemu bontonu oziroma medkulturnim razlikam. Analizirali smo dosedanje skupno poslovanje teh dveh držav ter ugotovili, da sta Slovenija in Kitajska povezani še iz časov Jugoslavije. Očitno smo uspeli dobro preučiti njihovo kulturo (in Kit...

  2. APLIKACIJA NAČEL VITKE PROIZVODNJE PRI IZDELAVI KOMPRESORJEV

    OpenAIRE

    Vergot, Leonida

    2012-01-01

    V današnjem času, času hude konkurence, v hitro razvijajočem se okolju, ki ga narekujejo odprti trgi, globalizacija in rastoče zahteve kupcev, morajo podjetja na vsakem koraku izbrati rešitve za izboljšanje svojih procesov, da lahko dosežejo konkurenčno prednost, jo obdržijo in povečujejo. Za izboljšanje procesov v naši proizvodnji in dvig produktivnosti smo izbrali koncept vitke proizvodnje. Diplomsko delo na teoretičnih in praktičnih primerih opisuje uvajanje načel vitke proizvodnje...

  3. Nebesedno komuniciranje pri prodaji izdelkov blagovne znamke "HAPPENING"

    OpenAIRE

    Šuhel, Kristina

    2009-01-01

    Komuniciranje spremlja človeka skozi vso njegovo življenje. Glede nato, da skoraj tretjino življenja preživimo v službi, velik del komunikacij poteka prav na delovnem mestu. Podjetje komunicira z obstoječimi, možnimi uporabniki, z zaposlenimi … Komuniciranje poteka z namenom, saj želimo od prejemnika sporočila določen odziv. Največji del komuniciranja zajema prav nebesedno komuniciranje, s katerim želi izvajalec marketinga ustvariti sliko o sebi in pripraviti javnost do aktivnosti, npr. do...

  4. Okeanos Explorer (EX1607): CAPSTONE Wake Island PRI MNM (Mapping)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Operations will include 24 hour/day mapping operations using the ship’s deep water mapping systems (Kongsberg EM302 multibeam sonar, EK60 split-beam fisheries...

  5. Kalman Filter Predictor and Initialization Algorithm for PRI Tracking

    National Research Council Canada - National Science Library

    Hock, Melinda

    1998-01-01

    .... The algorithm uses a Kalman filter for prediction combined with a preprocessing routine to determine the period of the stagger sequence and to construct an uncorrupted data set for Kalman filter initialization...

  6. Prying into the Prion Hypothesis for Parkinson's Disease.

    Science.gov (United States)

    Brundin, Patrik; Melki, Ronald

    2017-10-11

    In Parkinson's disease, intracellular α-synuclein inclusions form in neurons. We suggest that prion-like behavior of α-synuclein is a key component in Parkinson's disease pathogenesis. Although multiple molecular changes are involved in the triggering of the disease process, we propose that neuron-to-neuron transfer is a crucial event that is essential for Lewy pathology to spread from one brain region to another. In this review, we describe key findings in human postmortem brains, cultured cells, and animal models of disease that support the idea that α-synuclein can act as a prion. We consider potential triggers of the α-synuclein misfolding and why the aggregates escape cellular degradation under disease conditions. We also discuss whether different strains of α-synuclein fibrils can underlie differences in cellular and regional distribution of aggregates in different synucleinopathies. Our conclusion is that α-synuclein probably acts as a prion in human diseases, and a deeper understanding of this step in the pathogenesis of Parkinson's disease can facilitate the development of disease-modifying therapies in the future. Dual Perspectives Companion Paper: Parkinson's Disease Is Not Simply a Prion Disorder, by D. James Surmeier, José A. Obeso, and Glenda M. Halliday. Copyright © 2017 the authors 0270-6474/17/379808-11$15.00/0.

  7. UPORABA HEIJUNKA TEHNIKE PRI PLANIRANJU PROIZVODNJE AVTOMOBILSKIH DELOV

    OpenAIRE

    Narat, Jernej

    2012-01-01

    Cilj diplomskega dela je poiskati in preveriti ustreznost metode s pomočjo katere bi lahko planirali proizvodnjo v kovinarskem podjetju z čim manjšimi zalogami končnih izdelkov. V diplomskem delu smo ugotovili, da je rešitev našega problema vpeljava Heijunka tehnike. Planiranje in vodenje proizvodnje z rešitvami, ki jih ponuja Heijunka tehnika vodi uporabnika do zmanjšanja zalog končnih izdelkov brez ogrožanja dobav kupcu. Učinek zmanjšanja zalog se zaradi uporabe Heijunka tehnike pre...

  8. Primena metoda ekspertskog ocenjivanja pri oceni profesionalnog rizika

    OpenAIRE

    Zoran Novaković

    2007-01-01

    Osnovni cilj utvrđivanja ocene profesionalnog rizika je preventivno delovanje u funkciji bezbednosti i zaštite zdravlja zaposlenih, tj. preduzimanje opštih i posebnih mera zaštite na radu radi eliminisanja opasnosti ili štetnosti, ili smanjivanja vremena ekspozicije zaposlenog određenim faktorima rizika u sredinama gde je ustanovljena njihova prisutnost. U mnogim slučajevima raspoloživi podaci o prethodnim štetnim događajima su nepotpuni ili nisu dovoljno statistički relevantni...

  9. BOL I SUZBIJANJE BOLI PRI KRONIČNOJ RANI

    OpenAIRE

    PERSOLI-GUDELJ, MARIJANA; LONČARIĆ-KATUŠIN, MIRJANA

    2015-01-01

    U ovom preglednom članku opisan je patomehanizam nastanka bolnog osjeta i put njegovog širenja od mjesta ozljede do korteksa s posebnim osvrtom na pojavu boli kod kronične rane i važnosti njenog pravodobnog i pravovaljanog liječenja Istaknuto je značenje nociceptora (prihvatača bolnih podražaja) i kemijskih posrednika (neurotransmitera) te alogenih tvari koje se oslobađaju na mjestu ozljede i podražuju nocicepcijske neurone. U liječenju je naglašena primjena farmakoterapije (analgetici). Kao ...

  10. Zagotavljanje kakovosti projektov razvoja programske opreme pri zunanjih dobaviteljih

    OpenAIRE

    Kolar, Alenka

    2006-01-01

    This thesis is about software development in enterprises such as the public company Elektro-Slovenija d.o.o. whose core business is not software development. What is also common to these enterprises is that they are publicly owned and that they must follow public procurement laws. These enterprises have usually a department or a sector dedicated to information technology (IT). IT departments provide to other departments IT support, both computer hardware and software. User applications for th...

  11. Sistema angiogeneza v norme i pri sakharnom diabete

    Directory of Open Access Journals (Sweden)

    Anastasia Sergeevna Severina

    2004-12-01

    Full Text Available Ангиогенез представляет собой сложный морфогенетический процесс, который играет ключевую роль в эмбриогенезе и является физиологическим процессом образования кровеносных капилляров из капиллярных отростков и их организации в сосудистую сеть. Факт участия VEGF в развитии сосудистых осложнений при СД не вызывает сомнений. Однако, учитывая противоречивые результаты исследований, требуется дальнейшее детальное изучение роли VEGF при этих осложнениях с целью поиска принципиально новых подходов к профилактике и лечению сосудистых осложнений сахарного диабета.

  12. Oprijemljivi vmesniki pri učenju prostorske orientacije

    OpenAIRE

    KOMPARA, ROK

    2015-01-01

    Diplomsko delo zajema vse faze procesa izdelave oprijemljivega uporabniškega vmesnika in aplikacije za učenje prostorske orientacije predšolskih otrok. Poleg tehničnega dela je teorija podkrepljena tudi s pedagoškimi pogledi na tehnologijo in njeno uporabno vrednost kot pripomoček za učenje. Praktičen del obsega načrtovanje, prototipiranje in izdelavo oprijemljivega vmesnika, ki je podprt z rezultati testiranja, opravljenega v enem izmed vrtcev v Novi Gorici. Končni izdelek z imenom Moj...

  13. Determination of Fallout Radionuclides in Environmental Samples by Gamma-Ray Spectrometry; Mesure Spectrometrique Gamma des Radionucleides de Retombee Presents dans des Echantillons du Millieu; Opredelenie radioizotopov radioaktivnykh osadkov v probakh iz okruzhayushchej sredy pri pomoshchi spektrometrii gamma-luchej; Determinacion, por Espectrometria Gamma, de los Radionuclidos de Precipitaciones en Muestras del Medio Ambiente

    Energy Technology Data Exchange (ETDEWEB)

    Ward, G. M.; Johnson, J. E.; Wilson, D. W. [Department of Animal Science, Colorado State University, Fort Collins, CO (United States)

    1965-10-15

    vremeni na universitetskoj ferme sobrali znachitel'noe kolichestvo prob iz okruzhajushhej sredy dlja izuchenija dvizhenija cezija-137 v znachitel'noj chasti pishhevoj ce- pochki cheloveka. Vse proby imeli maluju udel'nuju aktivnost', i izmerenija proizvodili pri pomoshhi spektrometricheskogo ustrojstva dlja gamma-luchej nizkogo urovnja, sostojashhego iz kristalla NaJ (T1) diametrom 8 i tolshhinoj 4 djujma, prichem jetot kristall byl zashhishhen ot fona stal'noj kameroj s tolshhinoj stenok 5 djujmov i soedinen s 400-kanal'nym anali- zatorom amplitudy impul'sov. Otschet nabivok vozdushnyh fil'trov i krupnyh prob ( 1kg) suhogo furazha, zerna i pometa krupnogo rogatog o skota proizvodili neposredstvenno v postojannoj geometrii. Proby osadkov koncentrirovali propuskaniem ih cherez kationo- obmennye kolonki, zapolnennye doveksom-50. Radioaktivnost' moloka, mjasa i mochi pod- schityvali v bol'shih kol'ceobraznyh kontejnerah iz ljucita. V moloke, mjase i moche ob- naruzhivajutsja v chisle gamma-izluchajushhih radioizotopov lish' cezij-137, kalij-40, jod-131, barij-140 i lantan-140, poskol'ku oni javljajutsja edinstvennymi produktami delenija, po- gloshhaemymi v znachitel'nyh kolichestvah. Pomimo jetogo, drugie proby soderzhali cezij-141, cezij-144, sur'mu-125, rutenij-103, rutenij-106, cirkonij-95, niobij-95 i marganec-54. V probah, sobrannyh v 1962 i 1963 godah, pri pomoshhi'gamma-spektrometrii udalos' oprede- lenno obnaruzhit' lish' cirk{sup n}ij-95 i niobij-95 vvidu ih otnositel'nogo obilija; jeto bylo prodelano priblizitel'no za 6 mesjacev posle sbora prob. Fotopiki cezija-137, marganca-54 i sur'my-125 byli sovershenno rasplyvchatymi, a radioizotopy bolee malyh jenergij (cezij-141, cezij-144 i rutenij-103) imeli znachitel'nye komptonovskie vklady ot radio- izotopov bolee vysokih jenergij. Pri nedostatochno jasnyh fotopikah posledovatel'noe vydelenie produktov delenija iz spektrov ne javljaetsja nadezhnym. Kogda vlijanie drugih radioizotopov delaet nevozmozhnym

  14. Drift Instabilities and Electron Cyclotron Oscillations for Arbitrary Plasma Pressure; Instabilites de Derive et Oscillations Cyclotroniques des Electrons pour des Pressions de Plasma Arbitraires; Drejfovaya neustojchivost' i ehlektronno-tsiklotronnye kolebaniya pri proizvol'nom davlenii plazmy; Inestabilidades de Deriva y Oscilaciones Ciclotronicas de los Electrones en un Plasma de Presion Arbitraria

    Energy Technology Data Exchange (ETDEWEB)

    Krall, N. A.; Pearlstein, L. D. [General Atomic Division, General Dynamics Corporation, San Diego, CA (United States)

    1966-04-15

    radiar si estan acoplados a ondas transversales; con {beta} = 0 este acoplamiento se producan la superficie o en una inhbmogeneidad local. Puesto que un efecto notable de {beta} finito es el de acoplar ondas longitudinales y transversales, los autores calculan el espectro y el acoplamiento de oscilaciones ciclotronicas de los electrones para valores de {beta} arbitrarios. (author) [Russian] Bol'shaja chast' izvestnyh drejfovyh neustoj- chivostej {l_brace}zhelobkovaja, universal'naja i t . d . ) byla rasschitana v predele {beta} = (plazmennoe dav- lenie)/(magnitnoe davlenie)= 0. V jetom predele vozmushhennoe jelektricheskoe pole javljaetsja jelektrostaticheskim i uravnenie Vlasova maksimal'no uproshheno.- Predel'noe {beta}, pri kotorom eshhe spravedlivo jelektrostaticheskoe priblizhenie, zavisit ot rassmatrivaemoj formuly kolebanij, i mnogie sovremennye jeksperimenty vyhodjat za jetot diapazon. Dva horosho izvestnyh nizkochastotnyh vida drejfovyh neustojchivostej issledujutsja pri proizvol'nom {beta}; opredeljaetsja rezhim nulevogo {beta}, i vyvodjatsja kriteriiustojchivosti dlja bol'shih znachenij {beta}. Krome togo, issleduetsja vlijanie konechnogo {beta} na izuchenie na jelektronno-ciklotronnoj garmonike. Vnachale rassmatrivaetsja zhelobkovaja neustojchivost' s konechnym larmorovskim radiusom (R), vyzyvaemaja kriviznoj magnitnogo polja zerkal. Pugajushhie bol'shie chleny samyh nizkih porjadkov, obratno proporcional'nye R{sup 2}, sokrashhajutsja vo vseh porjadkah po {beta}. Glavnye chleny zatem ne zavisjat ot R i vkljuchajutsja v zadachu o sobstvennyh znachenijah; poluchajutsja kriterii ustojchivosti dlja razlichnyh diapazonov {beta}. Dalee rassmatrivaetsja universal'naja neustojchivost' E (vozmushhennoe) = E(exp ik{sub Up-Tack }r{sub Up-Tack })(exp ik{sub II}r{sub II}) v odnorodnom magnitnom'pole B = B{sub 0}i{sub II} s kriviznoj polja, imitirovannoj fiktivnoj siloj tjazhesti. V jetom sluchae predel nulevogo {beta} zavisit ot dliny voln.' Esli {beta}<(massa jelektrona

  15. Narusheniya v sisteme gemostaza pri sakharnom diabete i puti ikh korrektsii pri naznachenii kombinirovannoy terapii Diabetonom MV i metforminom

    Directory of Open Access Journals (Sweden)

    Alexander Sergeevich Ametov

    2007-09-01

    Full Text Available Для больных сахарным диабетом характерно атеротромботическое состояние, обусловленное множественными нарушениями в системе гемостаза. Гемостатические нарушения у больных сахарным диабетом являются обычно комплексными и включают активацию естественных механизмов системы коагуляции, подавление фибринолитической активности, а также различные нарушения функции тромбоцитов

  16. Comparative Study of the Methods Used for the Computer Resolution of Composite Gamma-Ray Spectra; Etude Comparative des Methodes Utilisees pour la Resolution de Spectres Gamma Complexes au Moyen d'un Ordinateur; Sravnitel'noe izuchenie metodov razresheniya sostavnykh gamma-spektrov pri pomoshchi schetno-reshayushchego ustrojstva; Estudio Comparativo de los Metodos Aplicados para Resolver Espectros Gamma Complejos Mediante Calculadoras

    Energy Technology Data Exchange (ETDEWEB)

    DeHaan, A. Jr.; Leventhal, L.; Benson, P. [Tracerlab, Richmond, CA (United States)

    1965-10-15

    diferentes metodos, prestando especial atencion a las muestras de baja actividad. Se han estudiado los metodos matematicos de uso mas corriente para resolver en sus componentes un espectro gamma complejo. Con arreglo a ellos, la concentracion de los diferentes emisores gamma se calcula por uno de los siguientes procedimientos: 1. Eliminacion sucesiva de radionuclidos con fotopicos de energia elevada sustrayendo el espectro puro del espectro complejo, hasta su resolucion. 2. Resolucion por picos sin sustraccion, 3. Establecimiento y resolucion de un sistema de ecuaciones lineales simultaneas del mismo grado que el numero de radionuclidos de la muestra. 4. Calculo de las concentraciones por cuadrados minimos, segun el metodo clasico o el ponderado. 5. Combinacion de los metodos estadistico y de cuadrados minimos con regresion lineal multiple gradual, lo que constituye una tentativa de introducir en el analisis los procesos determinantes. Se expone, para cada metodo analitico aplicado a mezclas compuestas por varios radionuclidos, el calculo estadistico de los errores inherentes a las concentraciones halladas. (author) [Russian] Razreshenie slozhnyh smesej gamma-izluchatelej bylo uskoreno blagodarja ispol'zovaniju ochen' slozhnyh gamma- spektrometrov sovmestno s cifrovymi schetno-reshajushhimi ustrojstvami. Jeti pribory poluchili v nastojashhee vremja shirokoe rasprostranenie i stali dostupnymi dlja tehnicheskih laboratorij. Daetsja opisanie metodov, primenjaemyh v laboratorii izotopnyh indikatorov dlja opredelenija koncentracii otdel'nyh gamma-izluchajushhih radioizotopov v probah radioaktivnyh osadkov, i sravnivajutsja rezul'taty, poluchennye s sostavnymi probami na osnovanii razlichnyh matematicheskih metodov. Poluchennye pri pomoshhi schetno-reshajushhego ustrojstva dannye sravnivajutsja s rezul'tatami, poluchennymi posredstvom radiohimicheskogo analiza proby. Opisyvaemymi nizhe sposooami snachala izucheny oinarnye smesi, a zatem rezul'taty jetogo analiza rasprostraneny na

  17. Progress towards phosphorus-33 production: studies on the enrichment of sulphur-33 by means of anion exchangers; Mise au point d'une methode de production du phosphore-33: etudes sur l'enrichissement du soufre-33 au moyen d'echangeurs anioniques; Uspekhi v poluchenii fosfora-33: izuchenie obogashcheniya sery-33 pri pomoshchi anionnykh obmennikov; Progresos on la produccion de fosforo-33: estudios realizados sobre el enriquecimiento del azufre-33 por medio de intercambiadores anionicos

    Energy Technology Data Exchange (ETDEWEB)

    Forberg, S; Westermark, T [Division of Physical Chemistry, Kungl. Tekniska Hogskolan, Stockholm 70 (Sweden)

    1962-01-15

    {sup 33}S mediante intercambio quimico entre el HSO{sub 3}{sup -} y el H{sub 2}SO{sub 3} para la produccion del {sup 33}P, por ser el metodo que mejores perspectivas ofrece. Encontraron que el desplazamiento mediante HCl del HSO{sub 3}{sup -} fijado en los intercambiadores anionicos constituye un metodo excelente para lograr condiciones de contracorriente y de reflujo total en este sistema. Destacan algunos inconvenientes del metodo, que derivan de la necesidad de trabajar con un reflujo muy intenso. En el instituto de tecnologia de Estocolmo se ha construido una instalacion en que se aplica este proceso, y la memoria indica los parametros obtenidos y la experiencia adquirida durante su funcionamiento, asi como los resultados experimentales. El enriquecimiento obtenido, muy inferior al calculado segun los resultados de laboratorio, se atribuye a la formacion de una ''cola'' de H{sub 2}SO{sub 3} en la fase HCl. Los autores han investigado este problema y encuentran que quiza se pudiera resolver empleando disolventes organicos en vez de soluciones acuosas. (author) [Russian] V kachestve naibolee perspektivnogo sposoba polucheniya P{sup 33} bylo vybrano obogashchenie S{sup 33} khimicheskim obmenom mezhdu HSO{sub 3} i H{sub 2}SO{sub 3}. Vytesnenie HSO{sub 3} pri pomoshchi HCl iz anionnykh obmennikov okazalos' ochen' udobnym metodom dlya polucheniya protivotecheniya i sozdaniya massovogo potoka flegmy dlya ehtoj sistemy. Ukazyvayutsya nekotorye prisushchie sisteme nedostatki, svyazannye s trebovaniyami intensivnogo potoka flegmy. Dlya osushchestvleniya ehtogo protsessa pri institute byla sozdana osobaya ustanovka, v doklade izlagayutsya poluchennye parametry, operativnyj opyt i rezul'taty. Blagodarya obrazovaniyu H{sub 2}SO{sub 3} pri vytesnenii HSO{sub 3} s pomoshch'yu HCl dostigalos' znachitel'no men'shee obogashchenie, chem ehto predpolagalos' pri provedenii laboratornykh rabot. Bylo provedeno izuchenie ehtoj problemy, i vozmozhnym putem, veroyatno

  18. Self-Absorption Studies with a 4 {pi} {beta}-Proportional Flow Counter; Etudes sur l'autoabsorption avec un compteur {beta} 4 {pi} proportionnel a courant; Izuchenie samopogloshcheniya pri pomoshchi {beta} proportsional'no-potochnogo 4 {pi} schetchika; Estudios sobre autoabsorcion con un contador de flujo proporcional {beta}4 {pi}

    Energy Technology Data Exchange (ETDEWEB)

    Yaffe, L; Fishman, J B [Radiochemistry Laboratory, Dept. of Chemistry, McGill University, Montreal, Quebec (Canada)

    1960-06-15

    entre 0,018 y 1,7 MeV) recogiendolos sobre finas peliculas de resina vinilica (VYNS) y han determinado las caracteristicas de autoabsorcion. Presentan una serie de curvas, obtenidas experimentalmente, que relacionan la E{sub max} el espesor de la fuente y la autoabsorcion. Les datos referentes a la autoabsorcion han sido sometidos a un analisis teorico, para contadores de angulo pequeno y 4 {pi}. Las curvas de autoabsorcion determinadas experimentalment e para contadores 4 {pi} estan comprendidas entre las curvas teoricas que corresponden a los angulos solidos pequenos y las curvas determinadas mediante contador de geometria 4 {pi}. (author) [Russian] Izuchenie samopogloshcheni {beta} izluchatelej provodilos' pri pomoshchi priemov, izlozhennykh Pejtom i YAffe v kanadskom khimicheskom zhurnale [Can. J. Chem. 34, 265 (1956]. Letuchie soedineniya H{sup 3}, S{sup 14}, So{sup 60}, Hg{sup 203}, As{sup 77} i P{sup 32} (E{sub max} ot 0,018 do 1,7 MeV) peregonyalis' na tonkie VYNS ustanovki i opredelyalas' kharakteristik a samopogloshcheniya . Privodyatsya serii s ehmpiri- cheskim opredeleniem krivykh, otnosyashchikhsya k E{sub max}, tolshchine istochnika i samopogloshchenie . Dannye samopogloshcheni ya podvergalis' teoreticheskom u analizu na schetchikakh s malym uglom i na 4 {pi} geometricheski kh schetchikakh. EHksperi- mental'no opredelennye krivye samopogloshcheni ya s pomoshch'yu 4 {pi} geometricheskikh schetchikov nakhodyatsya mezhdu krivymi, poluchennymi s pomoshch'yu schetchikov s teoreticheski malymi uglami i s pomoshch'yu 4 {pi} geometricheskikh schetchikov. (author)

  19. Use of the Scintigraphic Method In Morphological Exploration of the Liver during Amoebiasis; Application de la Methode Scintigraphique a l'Exploration Morphologique du Foie au Cours de l'Amibiase; Primenenie stsintigraficheskogo metoda dlya morfologicheskogo issledovaniya pecheni pri amebiaze; Aplicacion de la Centelleografia a la Exploracion Morfologica del Higado en Casos de Amibiasis

    Energy Technology Data Exchange (ETDEWEB)

    Gongora, R.; Jammet, H. [Fondation Curie, Paris (France)

    1964-10-15

    de los examenes que han efectuado y las conclusiones correspondientes. Describen la tecnica de examen considerando, sucesivamente: a) el problema de la eleccion de los productos (Rosa Bengala marcadb con {sup 131}I; {sup 198}Au en solucion coloidal) senalando sus ventajas e inconvenientes; b) los aparatos empleados, insistiendo en el problema de la colimacion; c) el desarrollo del examen, que comprende un examen funcional y la centelleografia propiamente dicha efectuada, necesariamente, desde varias proyecciones; d) la repeticion del examen a intervalos de varios meses. A continuacion, los autores tratan de la semiologia centelleograueca de las amibiasis hepaticas, analizan las imagenes anormales elementales, examinan su topografia y describen las asociaciones de esas imagenes en el caso de la hepatitis y en el de los abscesos amibianos. Estudian la evolucion temporal de esas imagenes y dan informacion sobre un cierto numero de casos en que el examen centelleografico se repitio a intervalos de varias semanas o de varios meses. Por ultimo, senalan en que casos esta indicado este metodo, que facilita datos esenciales para precisar el diagnostico positivo de los abscesos hepaticos amibianos y su diagnostico topografico y morfologico, particularmente interesante desde el punto de vista quirurgico, y que permite seguir la evolucion de la enfermedad y apreciar la curacion de los abscesos despues del tratamiento medico. (author) [Russian] Scintigraficheskij metod nahodit vse bole;e shirokoe primenenie pri morfologicheskom issledovanii amebnogo zabolevanija pecheni v svjazi s chastotoj pechenochnyh lokalizacij amebiaza i trudnostjami klinicheskogo i paraklinicheskogo diagnoza amebnogo abscessa pecheni. V dannoj oblasti metod daet vozmozhnost' poluchat' ves'ma interesnye dannye. Privoditsja statistika provedennyh opytov, predlagajutsja sootvetstvujushhie vyvody. Izlozhenie metoda issledovanija daetsja v sledujushhem porjadke: Problema vybora indikatora (Bengal'skaja roza

  20. A Method of Identification and Inspection for Inventory Control of Irradiated Fuel Elements; Methode d'Identification et d'Inspection Permettant de Proceder a l'Inventaire des Elements Combustibles Irradies; Metod identifikatsii i proverki pri inventarnom kontrole obluchennykh toplivnykh ehlementov; Metodos de Identificacion e Inspeccion para el Control de las Existencias de Elementos Combustibles Irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Kinderman, E. M.; Mills, J. S. [Stanford Research Institute, Menlo Park, CA (United States)

    1966-02-15

    neobhodimo proverjat' pri ljuboj polnoj inventarnoj proverke special'nyh jadernyh materialov. Jeto, odnako, svjazano s osobymi trudnostjami s tochki zrenija fiziki, s kotorymi .stalkivaetsja kontroler'ili rukovoditel' operacii po provedeniju inventarnogo kontrolja. V jetih mestah rasstojanie mezhdu ob{sup e}ktom i nabljudatelem i plohoe osveshhenie i iskazhenie sveta, vyzyvaemoe sredoj zashhity (voda, svincovoe steklo), delajut provedenie inventarnoj proverki eshhe bolee trudnoj. Chtoby preodolet' jeti trudnosti i sozdat' sistemu, kotoraja oblegchit opoznavanie vygruzhaemogo topliva iz reaktora, razrabotana kompaktnaja i udobnaja sistema opticheskoj proverki s primeneniem nepodvizhnoj stancii proverki, periskopa, teleskopa i kamery. Jeta sistema proverena v bassejne dlja obluchenija kobal'ta putem izuchenija probnyh obrazcov s razlichnoj markirovkoj, kotorye obrabatyvali v petle s gorjachej cirkulirujushhej vodoj. V sisteme proverki primenjali napolnennyj vodoj periskop dlinoju 11 futov, katadioptricheskij teleskop, raspolozhennyj v 16 futah ot periskopa, i 35 mm kameru dlja registracii nabljudenij. Teleskop, kamera i sborki vsegda mozhno peredvinut', poskol'ku oni vse vmeste vesjat menee 22 funtov i imejut maksimal'nyj razmer 29 djujmov. Fotograficheskie nabljudenija za proverochnymi tablicami razreshenija v vozduhe na rasstojanii 20 futov ot linzy ob{sup e}ktiva teleskopa pokazali, chto sistema mozhet davat' razreshenie 22 mikrona v shirinu. Jeto sootvetstvuet razresheniju 0,8 sek dugi. Predvaritel'nye ispytanija, provedennye s vodnoj sistemoj, pokazali, chto razreshajushhaja sposobnost' jetoj sistemy na rasstojanii 20 futov luchshe 50 mikron. Jeto sootvetstvuet razresheniju priblizitel'no 1 sek dugi. Jasno, odnako, chto razreshajushhaja sposobnost' vodnoj sistemy nikogda ne mozhet byt' luchshe vozdushnoj. V ljubom sluchae nyneshnjaja sistema, primenjaemaja pri inventarnoj proverke topliva, dolzhna nadlezhashhim obrazom vosproizvodit' ljubye inventarnye otmetki. (author)

  1. Performance Characteristics of the Experimental Boiling Water Reactor from 0 to 100 MW(t); Performances de l'EBWR de 0 a 100 MW; Rabochaya kharakteristika ehksperimental'nogo kipyashchego reaktora EBWR pri moshchnosti 0 - 100 mgvt.; Rendimiento del reactor experimental de agua hirviente (EBWR) entre 0 y 100 MW

    Energy Technology Data Exchange (ETDEWEB)

    Iskenderian, A.; Lipinski, W. C.; Petrick, M.; Wimunc, E. A. [Argonne National Laboratory, Argonne, IL (United States)

    1963-10-15

    .d. Rabochaya kharakteristika reaktora EBWR opredelyalas' pochti isklyuchitel'no po vydeleniyu para v osadok v spusknoj trube, po unosu zhidkosti ehfluentom para i kosvenno, putem lokalizatsii dejstvitel'noj poverkhnosti razdela v korpuse reaktora. Vydelenie para v osadok bylo dominiruyushchim faktorom v diapazone bolee nizkikh ehnergij. Pri moshchnosti svyshe 65 mgvt rabochaya kharakteristika reaktora rezko menyalas'. Skorost' otdeleniya para dostigla 33 sm/sek i vysota parovogo prostranstva umen'shilas' do 1 m. Pri takikh usloviyakh proiskhodil unos zhidkosti, kotoryj bystro uvelichivalsya s uvelicheniem moshchnosti. Reaktor bol'she ne vel sebya kak kipyashchij reaktor s pryamym tsiklom; v nekotorom rode on vel sebya kak reaktor s dvojnym tsiklom estestvennoj tsirkulyatsii. (author)

  2. The Effect of Kinetic Energy on the Reactions of Nucleogenic Carbon Atoms with Hydrocarbons; Effet de l'Energie Cinetique sur les Reactions des Atomes de Carbone Nucleogeniques avec des Hydrocarbures; Ehffekt kineticheskoj ehnergii pri reaktsiyakh atomov yadernogenichesko- go ugleroda s uglevodorodami; Efecto de la Energia Cinetica en las Reacciones de Atomos Nucleogenos de Carbono con Hidrocarburos

    Energy Technology Data Exchange (ETDEWEB)

    Dubrin, J.; Rosenberg, H.; Wolfgang, R. [Sterling Chemistry Laboratory, Yale University, New Haven, CT (United States); MacKay, C. [Haverford College, Haverford, PA (United States)

    1965-04-15

    -etileno se discuten en funcion de dos mecanismos de insercion previamente propuestos, a saber, la insercion del atomo de carbono en los enlaces C = C y C-H para formar compuestos de adicion C-C{sub 2}H{sub 4}. Al aumentar la concentracion de neon no desaparece ningun producto, pero los rendimientos relativos sufren modificaciones considerables. Los productos tales como el acetileno y el vinil-acetileno que pueden formarse a partir de los compuestos iniciales de adicion C-C{sub 2}H{sub 4}, en virtud de procesos que requieren gran cantidad de energia, disminuyen en importancia, mientras que aumenta el rendimiento de los productos formados por procesos que exigen poca energia, tales como los compuestos C{sub 5}. Algo semejante sucede con el etano. Los estudios por degradacion han mostrado que la distribucion intramolecular de {sup 11}C en el aleno y el metilacetileno formados a partir de etileno es afectada por el efecto moderador del neon. Ello implica la participacion de los enlaces C = C y C-H en la formacion de estos productos, asi como una relacion de dependencia entre la razon de ataque en esos dos tipos de enlace y la energia cinetica del atomo de carbono que interviene en la reaccion. Otros estudios con indicadores dobles acerca de la formacion de acetileno a partir de moleculas sencillas tales como CH{sub 2}CD{sub 2}, CH{sub 3}CH{sub 2}D, CD{sub 3}CDH{sub 2} y a partir de varias mezclas de otros alcanos y alquenos marcados indican que la perdida de energia cinetica por el atomo de carbono ejerce escaso efecto en el indice relativo de ataque en varios tipos de enlace C-H. (author) [Russian] Osnovnaja metodika izuchenija jeffekta kineticheskoj jenergii pri reakcijah atomov ugleroda, obrazuemyh v rezul'tate jadernyh preobrazovanij, svjazana s ispol'zovaniem horosho izvestnogo metoda zamedlenija s pomoshh'ju inertnyh gazov. Odnako jetot metod mozhet sochetat'sja s drugoj metodikoj, kak, naprimer, 1) ispol'zovanie akceptorov radikalov dlja obnaruzhenija processov

  3. Investigations on the structure of complex compounds by radioisotope exchange. The structure of cyanonitrosyl complexes; Recherches sur la structure des complexes par echange de radioisotopes - Structure des complexes cyanonitrosyliques; Issledovanie struktury slozhnykh soedinenij pri pomoshchi radioizotopnogo obmena - struktura slozhnykh tsianonitrozilovykh soedinenij; Estudio de la estructura de complejos por intercambio radioisotopico - Estructura de los complejos cianonitrosilicos

    Energy Technology Data Exchange (ETDEWEB)

    Jezowska-Trzeblatowska, B; Ziolkowski, J [University of Wroclaw (Poland)

    1962-03-15

    central y la capa p del atomo de nitrogeno. (author) [Russian] V kachestve slozhnogo svyazuyushchego zvena nitrozilovaya gruppa predstavlyaet osobyj interes kak po svoej strukture, tak i blagodarya svoemu svojstvu obrazovyvat' gruppy NO{sup -} i NO{sup +}. Dlya issledovaniya ehlektronnoj struktury K{sub 3}Mn(CN){sub 6} i K{sub 3}Mn(CN){sub 6}NO, valentnosti metalla i kharaktera soedinenij byli proizvedeny issledovaniya pri pomoshchi metoda radioizotopnogo obmena, a takzhe i drugikh fiziko-khimicheskikh metodov. Bylo obnaruzheno, chto dobavlenie nitrozilovoj gruppy k ionam geksatsionata znachitel'no uvelichivaet ustojchivost' soedineniya kak v tverdom sostoyanii, tak i v rastvore. EHto nablyudenie bylo podtverzhdeno issledovaniem kinetiki obmena v sistemakh: (I) K{sub 3}Mn(CN){sub 6} + KC{sup 14}N; (II) K{sub 3}Mn(CN){sub 5}NO + KC{sup 14}N. V oboikh sluchayakh reaktsii obmena v funktsii vremeni yavlyayutsya reaktsiyami pervogo poryadka, no oni znachitel'no otlichayutsya drug ot druga po skorosti. EHnergii aktivatsii ehtikh reaktsij ravny E{sub 1}=8,5 kilokalorij na molekulu i E{sub 11}=22,8 kilokalorij na molekulu. Anion Mn(CN){sub 5}NO{sub 3} svetochuvstvitelen, tak chto reaktsiya obmena nosit fotokhimicheskij kharakter. Sootnoshenie postoyannykh skorostej obmena v temnote i pri standartizirovannom osveshchenii ravno 1:100. Pervaya reaktsiya obmena (I) proiskhodit po tipu assotsiatsii, togda kak vtoraya reaktsiya (II) sleduet slozhnomu mekhanizmu assotsiatsii i dissotsiatsii. Analiz raspredeleniya aktivnosti mezhdu tsianistymi gruppami, podvergayushchimisya obmenu v sostoyanii izotopnogo ravnovesiya, obnaruzhil identichnost' po men'shej mere chetyrekh tsianistykh grupp. Bol'shaya ustojchivost' nitrozilovykh soedinenij po sravneniyu s geksatsianatami, a takzhe otsutstvie vtorichnykh dissotsiatsij byli podtverzhdeny razlichnymi metodami. Vse ehto ukazyvaet na strukturu NO{sup -} kompleksa. Predydushchie issledovaniya pokazali, chto nitrozilovaya gruppa koordiniruetsya v

  4. Patterns of Lethality and Absorbed Dose Distributions in Mice for Monoenergetic Neutrons; Letalite et Distribution de la Dose Absorbee chez la Souris pour des Neutrons Monoenergetiques; Letal'nost' i raspredelenie pogloshchennoj dozy pri obluchenii myshej monoehnergeticheskimi neitronami; Letalidad y Distribucion de las Dosis Absorbidas por el Raton para Neutrones Monoenergeticos

    Energy Technology Data Exchange (ETDEWEB)

    Frigerio, N. A.; Jordan, D. L. [Argonne National Laboratory, Argonne, IL (United States)

    1964-03-15

    retroceso. Determinaron las distribuciones energeticas de los neutrones con unos espectrometros especiales de {sup 10}B, {sup 3}He y {sup 6}Li. Con camaras de recuento Ne/Ar midieron los aportes de rayos {gamma}. Estas determinaciones demostraron que la contribucion de los rayos {gamma} es inferior al 0,8% mientras que la contribucion de los neutrones termicos y epitermicos en conjunto es inferior al 0,01% de la dosis total, expresada en rad. Los sujetos se expusieron a dosis medias en el eje central que variaban entre 180 y 1200 rad, en correspondencia con energias neutronicas comprendidas entre 396 y 658 keV {+-} 50 keV, a fin de abarcar la region de las resonancias del N y del O. Se comprobo que la letalidad varia pronunciadamente con la energia neutronica, siendo igualmente funcion pronunciada, pero independiente de la distribucion de la dosis. Sin embargo, sea cual fuere la dosis, la energia o la distribucion todos los animales que sobrevivieron S dias llegaron a sobrevivir por lo menos 144 dias muriendo luego a consecuencia de los habituales efectos diferidos. Esto indica que los neutrones rapidos monoenergeticos, exentos de contaminacion gamma y de neutrones epitermicos, causan casi exclusivamente la llamada 'muerte intestinal' precoz. (author) [Russian] Nalichie sil'nyh S, Nh O-rezonansov v diapazone jenergij ot 100 do 1500 kjev pozvolilo izuchit' specificheskie vzaimodejstvija nejtrona s jadrom, vlijajushhie na le ta l'nost ' , maksimal'nuju OBJe i t .d . Pri 62 mka na uskoritele Van-de-Graafa protony s jenergiej 1882 - 2738 kjev obrazujut monojenergeticheskie nejtrony v rezu l'tate reakcii L i{sup 7}(p, n)Be{sup 7}. Samok myshej linii CF-1 obluchali v celuloidnyh kapsulah monojenergeticheskimi nejtronami na rasstojanii 3,1 - 11,3 sm ot istochnika pod u gl om ot 0 do 1 radiana. Obluchenie bylo dvustoronnim i proizvodilos' odnovremenno vo vremja dvizhenija po cirkuljarnym ili jellipticheskim orbitam perpendikuljarno k osi puchka. Takim obrazom osushestvljalsja

  5. Adsorption studies at ionized surface layers by means of hot atoms; Etude, a l'aide d'atomes excites, de l'adsorption dans des couches superficielles ionisees; Issledovanie pri pomoshchi goryachikh atomov adsorbtsii na ionizirovannykh poverkhnostnykh sloyakh; Estudios, con ayuda de atomos excitados, de la adsorcion en capas superficiales ionizadas

    Energy Technology Data Exchange (ETDEWEB)

    Avrahami, Menashe; Steiger, Naftali H [Department of Chemistry, Technion - Israel Institute of Technology, Haifa (Israel)

    1962-03-15

    poverkhnostnogo izbytka pri pomoshchi nadlezhashchim obrazom izmenennoj izotermy Gibbsa, udalos' opredelit' adsorbtsiyu Bi{sup +++} i Pb{sup ++} po otnosheniyu k adsorbtsii Na{sup +} i H{sub 3}O{sup +} i tem samym ustanovit' stepen' ionnogo obmena v adsorbirovannom sloe. Tak kak ehtot metod pozvolyaet izmeryat' adsorbtsiyu zaryazhennykh chastits, to mozhno bylo prosledit' za poverkhnostnymi reaktsiyami, prevrashchayushchimi pervichnye pogloshchennye organicheskie aniony v neionnoe sostoyanie. Iz ehtogo mozhno bylo vyvesti zaklyuchenie otnositel'no obrazovaniya neionizirovannogo kislotnogo myla na poverkhnosti i otnositel'no obrazovaniya nitselly v masse rastvora pri razlichnykh ehksperimental'nykh usloviyakh. (author)

  6. Renal Scintiscanning with Hg{sup 209}-Neohydrin in Urologic Diseases; Scintigraphy du Rein dans les Maladies des Voies Urin Aires au Moyen de Neohydrine Marquee avec {sup 203}Hg; Stsintillyatsionnoe skennirovanie pochek s pomoshch'yu neogidrina,mechennogo Rtut'yu-203, pri urologicheskikh zabolevaniyakh; Exploracion Centelleografica del Rinon con Neohydrina - {sup 203}hg en las Afecciones Urologicas

    Energy Technology Data Exchange (ETDEWEB)

    Bollini, V.; Tori, G. [Radiology Institute of the University of Bologna (Italy)

    1964-10-15

    kolebljutsja v sootvetstvii s harakterom pochechnoj struktury i ee narushenij vsledstvie razlichnyh patologicheskih processov: opuholej, kist, gidronefroza, tuberkuleza i t.d. U zdorovyh ljudej obychno poluchajut odnorodnye scintigrammy, hotja poluchenie bolee chetkoj oblasti vorot organa ne javljaetsja redkim sluchaem. Kakoe-libo ogranichennoe umen'shenie scintigraficheskoj plotnosti vne vorot predstavljaet soboj funkcionirujushhuju menee aktivno zonu. Pri bolee krupnyh razmerah pochek, po sravneniju s normal'nymi, sleduet otlichat' odnorodnye skennogrammy, kotorye ukazyvajut na kompensatornuju gipertrofiju, neodnorodnyh i imejushhih nepravil'nuju formu. Izobrazhenija jetih poslednih ukazyvajut na nalichie krupnyh uchastkov gidronefroza, opuholej ili mnozhestvennyh kist. Pri pochechnyh sosudistyh zabolevanijah opredelenie haraktera pogloshhenija v obeih pochkah predstavljaet bol'shuju cennost' dlja ocenki snizhenija ih funkcii i dlja razgranichenija odnostoronnih i dvustoronnih porazhenij. Takim obrazom, scintilljacionnoe skennirovanie pochek obeshhaet dat' poleznye klinicheskie metody, osobenno v sochetanii s radiologicheskim issledovaniem pochek tradicionnymi sredstvami (urografija, voshodjashhaja pijelografija, retropnevmoperitoneum, tomografija, aorto- grafija it.d,),. (author)

  7. Non-Destructive Testing in Reactor Pressure-Vessel Fabrication; Essais non Destructifs dans la Fabrication des Caissons Etanches de Reacteurs; Nedestruktivnoe ispytanie pri izgotovlenii reaktornykh bakov vysokogo davleniya; Ensayo no Destructivo Durante la Fabricacion de Recipientes de Presion para Reactores

    Energy Technology Data Exchange (ETDEWEB)

    McGonnagle, W. J. [Fluids Dynamics Research, Iit Research Institute, Chicago, IL (United States)

    1965-09-15

    'nyj, rentgenovskij i gamma-radiografiju, ul'trazvuk, magnitnye chasticy i proniknovenie zhidkosti. Programma nedestruktivnyh ispytanij vkljuchaet proverku materiala plastiny, shtampovki, otlivki, obolochki i svarnyh shvov. Obsuzhdajutsja.opredelennye problemy, s kotorymi stalkivajutsja pri izgotovlenii jadernyh bakov vysokogo davlenija. Privodjatsja primery i obsuzhdajutsja specificheskie metody nedestruktivnyh ispytanij bakov vysokogo davlenija i ih komponentov. Izlagajutsja dejstvujushhie pravila i specifikacii, naprimer instrukcija po jekspluatacii kotlov i drugih sosudov vysokogo davlenija, izdannaja Amerikanskim obshhestvom inzhenerov-mehanikov, a takzhe instrukcii drugih rasporjaditel'nyh organov. Obsuzhdajutsja voprosy, kakim obrazom ispytanie bez razrushenija mozhet sodejstvovat' sobljudeniju specifikacij i trebovanij, predusmotrennyh razlichnymi rasporjaditel'nymi organami, a takzhe voprosy dostatochnosti i prigodnosti standartov, kotorye ispol'zujutsja pri takom primenenii. Predlagajutsja realistichnye i vmeste s tem otvechajushhie trebovanijam kriterii dlja priemki i brakovki. Daetsja opisanie procedury, kotoraja okazhet pomoshh' personalu, zanimajushhemusja nedestruktivnymi ispytanijami, dolzhnym obrazom vypolnjat' svoi objazannosti v sootvetstvujushhee vremja v processe izgotovlenija. Rassmatrivaetsja vzaimosvjaz' mezhdu gruppoj, provodjashhej nedestruktivnye ispytanija, i drugimi gruppami, svjazannymi s izgotovleniem sosudov vysokogo davlenija. (author)

  8. The Use of Technetium-99m as a Clinical Scanning Agent for Thyroid, Liver and Brain; Utilisation du {sup 99m}Tc comme Agent d'Exploration Clinique de la Thyroide, du Foie et du Cerveau; Ispol'zovanie Tc{sup 99m} kak klinicheskogo agenta pri skennirovanii shchitovidnoj zhelezy, pecheni i mozga; Empleo del {sup 99m}Tc como Agente para la Exploracion Clinica de la Tiroides, el Higado y el Cerebro

    Energy Technology Data Exchange (ETDEWEB)

    Harper, P. V.; Lathrop, K. A.; McCardle, R. J.; Andros, G. [Argonne Cancer Research Hospital and Department of Surgery, University of Chicago Hospitals and Clinics, Chicago, IL (United States)

    1964-10-15

    selectivamente por la tiroides, el estomago y las glandulas salivales. Los datos facilitados por la excrecion indican que su periodo biologico es de unos 2 d. Con una dosis de irradiacion calculada en 100 mrad para la glandula y en 5 mrad para el cuerpo entero, se pueden efectuar exploraciones tiroideas de muy buena calidad entre meedia hora y una hora despues de administrar 1 me de esta sustancia lo que representa una gran ventaja sobre el {sup 131}I. El TcO{sub 4} no atraviesa libremente la barrera hematoencefalica, lo que ha permitido obtener excelentes imagenes del cerebro con un tiempo de exploracion de 2 a 5 min aprovechando el elevado fndice de recuento correspondiente a dosis de 5 a 10 me de {sup 99m}Tc. Como el tiocianap pentavalente se disuelve en una emulsion de grasa, gran parte del {sup 99m}Tc se localiza en el higado; en este caso el elevado fndice de recuento permite tambien proceder a una rapida exploracion de esta glandula con un'mayor poder de resolucion. Es muy probable que este tipo de mejores resultados aun utilizando sondas mas eficaces y adaptando los parametros biologicos y quimicos a condiciones optimas. (author) [Russian] Pri poiskah ''ideal'nogo'' izotopa dlja skennirovanija tehnecij-99m, povidimomu, imeet mnogo preimushhestv. Jeto veshhestvo javljaetsja chistym gamma-izluchatelem s jenergiej 140 kjev (9% konveosija) otsutstvii izluchenija chastic, imeet shestichasovoj fizicheskij period poluraspada, umerennuju stoimost', javljaetsja dostupnym dochernim produktom molibdena-99 s periodom poluraspada 2,7 dnja, ot kotorogo on legko otdeljaetsja na kolonke s okis'ju aljuminija. V obychnoj forme (Tc{sup 99m}O{sub 4}{sup -}) on raspredeljaetsja v organizme tak zhe kak CIO{sub 4}{sup -} i J, bystro rasprostranjajas' vo vnekletochnom prostranstve, izbiratel'no zahvatyvaetsja shhitovidnoj zhelezoj, zheludkom i sljunnymi zhelezami. 5 sootvetstvii s dannymi vydelenija period poluvyvedenija sostavljaet priblizitel'no dva dnja. Chetkie skennogrammy shhitovidnoj

  9. Radioactive rare earths from fallout for study of particle movement in the sea; Etude du mouvement des particules dans la mer a l'aide de terres rares radioactives provenant de retombees; Ispol'zovanie osazhdayushchikhsya pri vypadenii radioaktivnykh redkikh zemel' dlya issledovaniya dvizheniya chastits v more; Estudio del movimiento de las particulas en el mar con ayuda de tierras raras radiactivas procedentes de las precipitaciones

    Energy Technology Data Exchange (ETDEWEB)

    Sugihara, Thomas T [Clark University, Worcester, MA (United States); Bowen, Vaughan T [Woods Hole Oceanographic Institution, Woods Hole, MA (United States)

    1962-01-15

    'interpreter les resultats de cette etude dans le cadre general de la geochimie marine des cations trivalente, et de mettre en evidence les aspects particuliers et l'utilite generale de cet essai d'utilisation des retombees comme indicateurs. (author) [Spanish] En el marco de un vasto estudio sobre la distribucion en el oceano Atlantico de los raclionuclidos de periodo largo procedentes de precipitaciones radiactivas, se han efectuado numerosas mediciones de la concentracion del cerio-144 y del promecio-147. Una comporacion de las variaciones horizontales y verticales de estas concentraciones con las concentraciones del estroncio-90, que fueron medidas al mismo tiempo, demuestra que las tierras rasas suelen abundar menos en las aguas superficiales que los nuclidos que se sabe son solubles. Esta observacion, unida al hecho de que se ha observado a menudo un enriquecimiento de las aguas profundas en tierras raras, permite afirmar que esos elementos experimentan un rapido transporte vertical al fijarse a particulas en vias de sedimentacion. Esta hipotesis es perfectamente compatible con el comportamiento ''radiocoloidal'' caracteristico de las tierras raras al pH del agua de mar. En la memoria se procura interpretar este estudio en el contexto de las propiedades generales de los cationes trivalentes en geoquimica marina; asimismo, se ponen de manifiesto los aspectos caracteristicos y la utilidad general de este ensayo de utilizacion de las precipitaciones como indicadores radiactivos. (author) [Russian] V kachestve chasti podrobnogo issledovaniya raspredeleniya dolgozhivushchikh radioizotopov, osevshikh pri vypadenii v Atlanticheskom okeane, bylo prodelano znachitel'noe chislo zamerov kontsentratsii tseriya-144 i prometiya-147. Sopostavlenie ehtikh kontsentratsij po mere ikh izmeneniya kak v gorizontal'nom, tak i v verti-kal'nom napravleniyakh s odnovremenno zamerennymi kontsentratsiyami strontsiya-90 pokazyvaet, chto redkie zemli nakhodyatsya obychno v men'shikh kolichestvakh na

  10. The use of radioactive inserts in the study of metal deformation during tube-making processes; Emploi de fils metalliques radioactifs pour l'etude des deformations des metaux pendant la fabrication de tubes; Ispol'zovanie radioaktivnykh vtulok dlya izucheniya deformatsii metallov pri protsesse izgotovleniya trub; Empleo de insertos radiactivos en el estudio de la deformacion de los metales durante la fabricacion de tubos

    Energy Technology Data Exchange (ETDEWEB)

    Davison, W H.T. [Tube Investments Research Laboratories, Cambridge (United Kingdom)

    1962-01-15

    experimental, que es aplicable a los estudios sobre deformacion de los metales en general. En este metodo es preciso localizar el inserto radiactivo con un error no mayor de un milimetro, lo que exige un poder de resolucion superior al que requieren normalmente las tecnicas de exploracion medica. Se examinan los problemas correspondientes en terminos de energia gamma, diseno del colimador y discriminacion de energias. (author) [Russian] V nastoyashchej rabote rassmatrivaetsya vopros ob ispol'zovanii radio- aktivnykh vtulok pri izuchenii deformatsii stali v pirsing-protsesse s pomoshch'yu goryachego rotatsionnogo metoda. ZHeleznaya ili stal'naya provoloka aktiviruetsya v reaktore, pomeshchaetsya v truby, pro- sverlennye v zheleznykh ili stal'nykh zagotovkakh, kotorye zatem podvergayutsya obrabotke v normal'nykh proizvodstvennykh usloviyakh. Tshchatel'noe nablyudenie pokazyvaet, chto radiatsionnoe obluchenie i zagryazneniya ustanovki sovershenno neznachitel'ny. Posle okhlazhdeniya zagotovki podvergayutsya analizu v laboratorii putem primeneniya kollimirovannogo stsintillyatsionnogo schetchika, raspolozhennogo perpendikulyarno k poverkhnosti prosverlennoj zagotovki; krivye izodoz pokazyvayut formu deformiro- vannoj radioaktivnoj vtulki, raspolozhennoj pod pryamym uglom k poverkhnosti truby. Drugoj grafik poluchaetsya ot podobnogo roda razvertki uchastka, nakhodyashchegosya pod pryamym uglom k osi truby; pri pomoshchi dvukh poluchennykh grafikov poluchaetsya kartina v trekh izmereniyakh. V dokumente privodyatsya nekotorye rezul'taty, no osnovnoe vnimanie v nem udelyaetsya metodam provedeniya ehksperimentov, kotorye shiroko ispol'zuyutsya pri izuchenii defor- matsii metallov. Vtulki dolzhny byt' raspolozheny na rasstoyanii millimetra ili okolo ehtogo, dlya chego trebuetsya bolee vysokaya razreshayushchaya sposobnost' po sravneniyu s normal'nymi metodami issledovaniya, primenyaemymi v meditsine. Problemy dostizheniya ehtogo ras- smatrivayutsya v nastoyashchem doklade v zavisimosti

  11. Total Counting and Spectroscopy in the Assessment of Alpha Radioactivity in Human Tissues; Determination de la Radioactivite Alpha des Tissus Humains par Dosage de l'Activite Globale et Spectroscopie; Obshchee izmerenie i spektroskopiya pri opredelenii al'fa-radioaktivnosti tkanej cheloveka; Evaluacion de la Actividad Alfa en los Tejidos Humanos por Recuento Global y Espectroscopia

    Energy Technology Data Exchange (ETDEWEB)

    Mayneord, W. V.; Hill, C. R. [Physics Department, Institute of Cancer Research, Royal Cancer Hospital, Clifton Avenue, Belmont, Surrey (United Kingdom)

    1964-10-15

    atmosfera y se citan ejemplos de los resultados de las mediciones de aire ligeramente contaminado por esa sustancia. Se describen asimismo procedimientos de medicion del {sup 239}Pu en tejidos humanos normales y se exponen algunos resultados. Se estudia la contribucion aportada por el {sup 210}Po a la dosis de irradiacion natural proveniente del medio ambiente en el esqueleto y en los organos reproductores del hombre. Se demuestra que esa aportacion puede constituir una fraccion significativa de la dosis total recibida. (author) [Russian] Daetsja kratkij obzor programmy po izmereniju al'fa- radioaktivnosti. Vypolnenie programmy, kotoroe pervonachal'no osnovyvalos' na ispol'zovanii prostyh i chuvstvitel'nyh metodov podscheta s pomoshh'ju tonkih cink-kadmij-sul'fidnyh jekranov teper' vkljuchaet ispol'zovanie metoda al'fa-spektroskopii, razrabotannogo dlja bol'shogo kolichestva istochnikov s nizkoj specificheskoj aktivnost'ju. S pomoshh'ju jetih metodov mozhno izmerjat' urovni specificheskoj aktivnosti vplot' do 10{sup -13} kjuri/g i v nekotoryh sluchajah poluchat' razreshenie jenergii porjadka 40 kjev narjadu s nezavisimoj identifikaciej, osnovannoj na izmerenii perioda poluraspada. Daetsja opisanie dvuh al'fa-spektrometrov, ispol'zovannyh pri izmerenii bol'shogo kolichestva obrazcov, vzjatyh u ljudej, i materialov okruzhajushhej sredy. Osoboe vnimanie udeljalos' izucheniju Po{sup 210} , kotoryj, kak izvestno, prisutstvuet v rjade pishhevyh produktov i tkanjah chelovecheskogo organizma. Opisany metody issledovanija Pu{sup 239} v atmosfere i privedeny primery rezul'tatov izmerenija zagrjaznenija vozduha malymi kolichestvami jetogo materiala. Opisany metody izmerenija Pu{sup 239} v normal'nyh tkanjah u cheloveka i privedeny nekotorye rezul'taty. Obsuzhdaetsja rol' Ro{sup 210} v povyshenii urovnja estestvennogo fonovogo obluchenija kostej i reproduktivnyh organov cheloveka. Pokazano, chto jeta dolja mozhet sostavljat' znachitel'nuju chast' obshej poluchennoj dozy. (author)

  12. The use of Kr{sup 85} for the measurement of leaks in hermetically sealed components; Emploi du krypton-85 pour la detection des fuites dans les pieces hermetiquement scellees; Opredelenie utechki germeticheski izolirovannykh komponentov pri pomoshchi Kr''8''5; Empleo del {sup 85}Kr para la deteccion de fugas en piezas hermeticamente selladas

    Energy Technology Data Exchange (ETDEWEB)

    Berry, P F; Cameron, J F [Wantage Research Laboratory (A. E. R. E.), Wantage, Berks. (United Kingdom); Wilson, E J [Radiochemical Centre, Amersham, Bucks. (United Kingdom)

    1962-01-15

    los poros del material constituye el principal factor que limita la sensibilidad del primer metodo; los autores tratan de la gravedad de este efecto al estudiar la aplicacion de este metodo a la deteccion de fugas en cartuchos para transistores. La introduccion de gas radiactivo en la pieza antes de cerrarla presenta la ventaja de que es posible controlar el contenido de la pieza durante un largo periodo de tiempo. Con esto se elimina la posibilidad de que el orificio por el que se produce la fuga se obture pasajeramente en el momento en que se aplican la presion o el vacio, obteniendose ademas un valor integrado de la magnitud de la fuga, esto es, un dato de mayor utilidad. (author) [Russian] Radioaktivnye gazy obespechivayut metod opredeleniya utechki germeticheski izolirovannykh komponentov, kotoryj v osobykh sluchayakh mozhet byt' bolee chuvstvitel'nym na neskol'ko poryadkov moshchnosti, nezheli obychnye metody opredeleniya utechki. Dlya ehtoj tseli v nastoyashchem doklade privoditsya opisanie ispol'zovaniya Kg{sup 85}. Gaz mozhno ispol'zovat' dvumya putyami. V pervom sluchae komponent pogruzhaetsya v gaz pri kontroliruemykh usloviyakh davleniya i vremeni, a ego prosochivsheesya kolichestvo pod davleniem izmeryaetsya posleduyushchim kontrolirovaniem radiatsii, pronikshej cherez stenki komponenta. Vo vtorom sluchae nekotoroe kolichestvo aktivnogo gaza vvoditsya do izolyatsii, a posleduyushchaya poterya aktivnosti yavlyaetsya meroj skorosti utechki. Vybor metoda zavisit ot razmerov komponenta i ego naznacheniya. Osnovnym ogranicheniem chuvstvitel'nosti v pervom metode yavlyaetsya zarazhenie poverkhnosti, blagodarya proniknoveniyu gaza v pory materiala komponenta; razmery ehtogo proniknoveniya obsuzhdayutsya v primenenii metoda po opredeleniyu utechki v obolochkakh poluprovodnikovykh triodov. Predvaritel'noe zapolnenie komponenta aktivnym gazom do germetizatsii imeet preimushchestvo v tom, chto dlitel'nyj kontrol' nad soderzhaniem komponenta vozmozhen. EHto

  13. Radioautography in the Study of Radioisotopically-Tagged Substances in Insect Control; L'autoradiographie dans l'etude de substances marquees au moy en de radioisotopes utilisees dans la lutte contre les insectes; Primenenie radioavtografii pri izuchenii substantsij, mechennykh radioizotopami, v bor'be s nasekomymi; La autorradiografia en el estudio de las sustancias marcadas con radioisotopos utilizadas en la lucha contra los insectos

    Energy Technology Data Exchange (ETDEWEB)

    Joftes, D. L. [New England Deaconess Hospital, Boston, MA (United States)

    1963-09-15

    histologicos corrientes. Un ligero desplazamiento ascendente del foco pone de relieve los detalles de la autorradiografia que, de este modo, se puede estudiar en relacion con el tejido. En la memoria se describen en detalle las tecnicas recomendadas y el sencillo equipo necesario, que suele encontrarse en todos los laboratorios. (author) [Russian] Pri otnositel'no nebol'shikh zatratakh truda bolee novye,uproshchenie metody radioavtografii obespechivayut bol'shuyu chuvstvitel'nost' i tochnost' na mikroskopicheskom urovne vo mnogikh fazakh issledovanij odnokratno i dvukhkratno mechennykh radioizotopami insektitsidov, naprimer pri issledovanii pogloshcheniya, peremeshcheniya, metabolizma i opredelenii ostatkov insektitsidov v rasteniyakh, u nasekomykh i tavotnykh. Fiziologiya i biokhimiya obluchennykh nasekomykh yavlyayutsya drugimi oblastyami primeneniya radioavtografii. Vozdejstvie oblucheniya, osobenno na generativnye organy, izuchaetsya s pomoshch'yu mechennogo tritiem timidina. V to vremya kak metody scheta dayut mnogo informatsii o nalichii i kolichestve radioizotopov, s pomoshch'yu radioavtografii mozhno poluchit' dannye o fakticheskikh mestakh ikh otlozheniya v tkanyakh ili dazhe v chastyakh kletok. Poluchenie takoj razreshayushchej sposobnosti vozmozhno na obychnykh postoyannykh gistologicheskikh preparatakh, v to vremya kak pri primenenii metodov scheta dlya polucheniya tochnogo rezul'tata trebuetsya razrushenie obraztsa. Standartnaya radioavtografiya osobenno udobna dlya proslezhivaniya malykh kolichestv izotopov, sostavlyayushchikh doli mikrokyuri, ochen' slabykh izluchatelej, takikh, kak radioaktivnyj uglerod (C{sup 14}) i tritij (H{sup 3}), togda kak dlya rabot s ochen' slabymi izluchatelyami s primeneniem metodov scheta trebuyutsya ochen' dorogie i slozhnye pribory. Metod ne imeet ogranichenij v otnoshenii izotopov, primenyaemykh dlya mecheniya, tak kak dazhe izlucheniya tritiya i C''1''4 budut fiksirovat'sya na yadernoj fotoehmul'sii. Dejstvitel'no, tritij i C''1

  14. Data Evaluation Problems in the Pulsed Neutron Source Method; Problemes d'Evaluation des Donnees dans les Applications de la Methode de la Source Pulsee; Problemy otsenki dannykh pri primenenii metoda istochnika impul'snykh nejtronov; Problemas de Evaluacion de Datos en el Metodo de la Fuente de Neutrones Pulsados

    Energy Technology Data Exchange (ETDEWEB)

    Pal, L.; Bod, L.; Szatmary, Z. [Central Research Institute for Physics, Hungarian Academy of Sciences, Budapest (Hungary)

    1965-08-15

    muy importante determinar directamente el parametro caracteristico del fondo, partiendo de los datos de desin tegracion obtenidos empleando diversas demoras. Los parametros de difusion se calcularon con el metodo de los cuadrados minimos ponderados, empleando las constantes de desintegracion de desviacion tipo minima obtenidas segun la funcion de maxima probabilidad. Como no se conocian los valores del recorrido libre medio de transporte para los materiales investigados, se ideo un procedimiento de iteracion rapidamente convergente para determinarlo. Con la calculadora se pudieron determinar los coeficientes de orden B{sup 6} y los terminos superiores de la constante de desintegracion. Los parametros de difusion de los materiales hidrogenados investigados se calcularon con la formula de Radkowsky, partiendo de la variacion de las secciones eficaces integrales de dispersion en funcion de la energia. Los calculos demuestran que la formula de Radkowsky proporciona un metodo empirico muy util para evaluar el recorrido libre medio de transporte en gran numero de materiales hidrogenados. (author) [Russian] Dlja opredelenija diffuzionnyh parametrov teplovyh nejtronov uzhe bolee desjati let primenjaetsja impul'snyj metod. Jetot metod okazalsja ves'ma podhodjashhim dlja issledovanija gidrogennyh zamedlitelej. Soobshhajutsja rezul'taty izmerenij v vode, benzole, toluole, ksilon-ciklogeksane, n-geksane i difenile; obsuzhdajutsja metody, s po- moshh'ju kotoryh na osnovanii izmerennyh dannyh s naimen'shej pogreshnost'ju mozhno opre- delit' parametry diffuzii, predstavljajushhie interes. Vvidu togo, chto pri issledovanii zamedlitelej pri vysokih temperaturah vstrechajutsja zatrudnenija tehnicheskogo haraktera iz-za projavlenija vozdejstvija vremeni proleta, chto oka- zyvaet vlijanie na velichinu konstanty raspada, to jeto javlenie podrobno issleduetsja kak teoreticheski, tak i jeksperimental'no; ukazyvajutsja geometricheskie uslovija, dajushhie voz- mozhnost' obespechit

  15. The use of radioactive tracers in lubrication and wear research; Emploi des indicateurs radioactifs dans les recherches sur la lubrification et l'usure; Ispol'zovanie mechenykh atomov pri issledovanii voprosov smazki i iznosa; Utilizacion de los indicadores radiactivos en los estudios sobre la lubricacion y el desgaste

    Energy Technology Data Exchange (ETDEWEB)

    Campbell, R B; Grunberg, L; Milne, A A; Wright, K H.R. [Lubrication, Wear and Mechanical Engineering Aspects of Corrosion Division, National Engineering Laboratory, Thorntonhall, Glasgow (United Kingdom)

    1962-01-15

    , se insertan en las camisas de un motor diesel varillas de fundicion que contienen iridio-192, y se mide la radiactividad de las muestras de aceite. Se utilizan particulas radiactivas de hierro y de oxido de hierro para estudiar su influencia en los procesos de desgaste. Empleando acido estearico marcado con carbono-14 y azufre-35 en solucion, se investiga la reactividad de las superficies del metal sometido a tensiones. Por otra parte, se esta estudiando la velocidad de reaccion de los aditivos lubricantes de engranajes haciendo pasar impulsos breves de corriente electrica a traves de hilos metalicos sumergidos en soluciones de compuestos marcados con azufre-35 y fosforo-32. Se investiga la formacion de peliculas antidesgaste en la superficie de los dientes de los engranajes en funcion de la carga, de la velocidad y del tiempo de funcionamiento. En muchas de estas aplicaciones se tropieza con la dificultad de tener que calcular las cantidades absolutas de materiales presentes en las peliculas que se forman en la superficie, o en las particulas originadas por el desgaste, a partir de la actividad medida. Con tal objeto se han elaborado metodos de calibracion. (author) [Russian] Vo mnogikh problemakh smazki i iznosa sleduet izuchat' protsessy, vstrechayushchiesya v ochen' malykh masshtabakh. Pri ehtom uspeshno ispol'zovalas' bol'shaya chuvstvitel'nost' indikatornykh metodov. Nekotorye primery podobnogo ispol'zovaniya ehtikh metodov dayutsya iz raboty otdela smazki i amortizatsii Natsional'noj tekhnicheskoj laboratorii Velikobritanii. Kolichestvennoe sootnoshenie mezhdu metallicheskoj peredachej i poverkhnost'yu treniya izuchaetsya kak funktsiya skorosti proskal'zyvaniya nerovnosti poverkhnosti i nalichiya smazochnykh materialov. Dlya togo, chtoby proanalizirovat' raspredelenie iznosa, chugunnye probki, soderzhashchie iridij-192, vstavlyayutsya v prokladki dizelya. Radioaktivnost', imeyushchayasya vo vzyatykh obraztsakh masla, zameryaetsya. Radioaktivnoe zhelezo i

  16. Carcinogenesis by Fast Neutrons Relative to X-Rays in Mice; Carcinogenese chez les Souris sous l'Effet des Neutrons Rapides et des Rayons X; Sravnitel'naya chastota vozniknoveniya rakovykh opukholej u myshej pri obluchenii bystrymi nejtronami i rentgenovskimi luchami; Accion Carcinogenica Comparada de los Neutrones Rapidos y de los Rayos X en el Raton

    Energy Technology Data Exchange (ETDEWEB)

    Cole, L. J.; Nowell, P. C. [Division of Biological and Medical Sciences, U.S. Naval Radiological Defense Laboratory, San Francisco, CA (United States); Department of Pathology, School of Medicine, University of Pennsylvania, Philadelphia, PA (United States)

    1964-05-15

    jetih novoobrazovanij pri primenenii nejtronnogo obluchenija i ispol'zovanii specificheskih proliferativnyh raz drazhitelej. Dannye pokazyvajut, chto potencial'nyj faktor so stavlja et priblizitel'no 2 dlja nejtronov delenija otnositel'no rentgenovskih luchej s pikovym naprjazheniem 250 kv dlja vozniknovenija opuholej pochek u myshej. Chto kasaetsja razvitija limfomn, to u myshej, podvergnutyh nejtronnomu oblucheniju, chastota ih vozniknovenija okazalas. (author)

  17. Influence of Aerosol Properties and the Respiratory Pattern upon Hazards Evaluation following Inhalation Exposure; Influence des Caracteristiques des Aerosols et du Regime de la Respiration sur l'Evaluation des Risques, a la Suite d'une Exposition par Inhalation; Vliyanie svojstv aehrozolej i obraztsa respiratora na otsenku opasnosti oblucheniya pri vdykhanii radioaktivnykh veshchestv; Influencia de las Propriedades de los Aerosoles y de su Esquema Repiratorio en la Evaluacion de los Riesgos Consecutivos a una Exposicion por Inhalacion

    Energy Technology Data Exchange (ETDEWEB)

    Thomas, R. G. [Lovelace Foundation for Medical Education and Research, Albuquerque, NM (United States)

    1964-10-15

    diferentes caracteristicas fisicas y quimicas de las particulas inhaladas y las tres variables biologicas antes mencionadas. Se presentan datos acerca de la cantidad y localizacion de la sustancia depositada, determinados en funcion del tamano de las particulas inhaladas, en el caso de un compuesto soluble en los tejidos (cloruro de cesio) y en el caso de un compuesto insoluble en los tejidos (Cloruro de torio). Asimismo, se facilita informacion encaminada a explicar las variaciones que se producen en la distribucion de un elemento en los tejidos y en su excrecion, segun su forma fisicaca y quimica al ser inhalado. Se exponen datos proporcionados por los experimentos realizados con aerosoles de muchas sustancias, entre ellas las ya mencionadas, para poner de manifiesto la peculiar correlacion existente entre la carga corporal y la excrecion por via fecal durante los primeros dias consecutivos a la exposicion. Se demuestra la ventaja de efectuar a la vez analisis de orina y de heces para determinaciones biologicas. Utilizando los anteriores datos como ejemple, se ponen de relieve los errores inherentes a los actuales metodos de evaluacion practica de riesgos, basados en el analisis de muestras de aire y de sustancias biologicas. (author) [Russian] Imeetsja tri vazhnyh biologicheskih parametrov, neobhodimyh dlja ocenki opasnosti v rezul'tate popadanija soedinenij v organizm ljubym putem. K nim otnosjatsja: 1) kolichestvo otlozhivshegosja v organizme veshhestva; 2) raspredelenie i kinetika peremeshhenij v organizme; 3) skorost' vyvedenija veshhestva. Pri sluchajnom obluchenii v celom otsutstvujut dostatochnye kolichestvennye dannye po jetim punktam. V doklade izlagajutsja dannye jeksperimental'nyh issledovanij na zhivotnyh, pokazyvajushhie sootnoshenie mezhdu razlichnymi fizicheskimi i himicheskimi harakteristikami vdyhaemyh chastic i upomjanutymi vyshe tremja biologicheskimi peremennymi. Predstavleny dannye o kolichestve i lokalizacii otlozhivshegosja materiala kak funkcii

  18. The Pulsed Neutron Technique Applied to Fast Non-Multiplying Assemblies; Application de la Methode des Neutrons Pulses aux Assemblages Non Multiplicateurs a Neutrons Rapides; Primenenie metoda impul'snykh nejtronov pri izuchenii povedeniya bystrykh nejtronov v nerazmnozhayushchikh sborkakh; Aplicacion de la Tecnica de los Neutrones Pulsados a Conjuntos Rapidos de Materiales No Multiplicadores

    Energy Technology Data Exchange (ETDEWEB)

    Beghian, L. E.; Wilensky, S. [Massachusetts Institute of Technology, Cambridge, MA (United States)

    1965-10-15

    mozhno opredelit' putem izmerenija postojannoj spada v zavisimosti ot razmera sborki. Predstavlen teoreticheskij vyvod dlja rascheta doli uprugogo rassejanija v chlene utechki i, sledovatel'no, mozhno opredelit' sechenie neuprugogo rassejanija. Teoreticheskaja traktovka dlja rascheta vklada uprugogo rassejanija proverena jeksperimental'nym putem. Sechenie neuprugogo rassejanija zheleza izmereno s pomoshh'ju jetogo metoda dlja pervichnoj jenergii nejtronov v diapazone 0,8 -1,5 Mjev. Vysheopisannyj metod impul'snogo istochnika nejtronov byl ispol'zovan dlja. izmere nija postojannoj spada v otnoshenii svincovyh plastin. Jeksperimental'nye dannye primerno soglasujutsja s predpolozhenijami, kotorye obychno delajut pri reshenii bol'cmanovskogo uravnenija perenosa s vremennoj zavisimost'ju (t.e. odnomernoe, odnoskorostnoe). Postojannye spada izmereny dlja svincovyh plastin razmerom 28x32 djujma i tolshhinoj 2; 4; b i 8 djujmov. Posle vnesenija popravki na poterju jenergii i konechnye razmery sborki rezul'taty sravnivajutsja s priblizitel'nymi reshenijami bol'cmanovskogo uravnenija perenosa. (author)

  19. Automatic Sample and Data Processing in Studies of Calcium Metabolism in Rats; Traitement Automatique des Echantillons et des Donnees dans l'Etude du Metabolisme Calcique chez le Rat; Avtomaticheskaya obrabotka obraztsov i dannykh pri izuchenii obmena kal'tsiya u krysy; Tratamiento Automatico de las Muestras y de los Datos en el Estudio del Metabousmo del Calcio en la Rata

    Energy Technology Data Exchange (ETDEWEB)

    Onkelinx, C.; Richelle, L. J.; Debras, J. [Universite de Liege (Belgium)

    1965-10-15

    , s odnoj storony, izuchenija jevoljucii indikatornoj dozy kal'cija-45, vvedennoj vnutrivenno, a s drugoj -izmerenija himicheskogo i radiohimicheskogo balansa. Sochetanie jetih dvuh tipov informacii i ih matematicheskaja obrabotka vedet k resheniju voprosa o sozdanii obshhej modeli obmena kal'cija, chto daet vozmozhnost' znat' kolichestvo obmenivaemyh kletok i velichinu razlichnyh faktorov, takih kak pogloshhenie v kishechnike, vydelenie iz pochek i kishechnika, otlozhenie kal'cija v kostjah i vyhod kal'cija iz kostej. Nashi raboty byli oblegcheny primeneniem avtomaticheskih metodov izmerenija obrazcov i obrabotki dannyh, kotorye i sostavljajut predmet nastojashhego doklada. Obrabotka obrazcov. Izmerenija radioaktivnosti proizvodili na obrazcah plazmy nebol'shogo ob'ema (20 - 40 {lambda}), kotorye brali povtorno iz prob mochi i fekalij, vzjatyh v opredelennoe vremja. Izmerenie aktivnosti provodili na schetchike antisovpadenij so olabym fonovym shumom, vkljuchajushhim avtomaticheskoe ustrojstvo dlja otbora prob i jelektronnuju ustanovku, izmerenija kotoroj registrirovalis' pechatajushhim ustrojstvom. Obsuzhdajutsja original'nye metody podgotovki obrazcov i ih izmerenija, v chastnosti statisticheskie uslovija scheta, vyverennye na vychislitel'noj mashine pri kazhdom izmerenii. Obrabotka dannyh. Proizvoditsja na jelektronnoj vychislitel'noj mashine IBM 7040, kotoroj zadajut raschetnuju programmu i ispol'zujut nabor neobrabotannyh dannyh ob jeksperimente v vide perforirovannyh kartochek na kazhdoe zhivotnoe otdel'no. Dannye obrabatyvajutsja v tri jetapa: 1) preobrazovanie neobrabotannyh dannyh i raschet standartnogo otklonenija izmerenij kazhdogo obrazca; 2) analiz krivoj udel'noj radioaktivnosti plazmy v zavisimosti ot vremeni i raschet ego matjomaticheskogo vyrazhenija; vyverka na tochnost' teoreticheskoj krivoj s pomoshh'ju jeksperimental'nyh izmerenij; 3) reshenie polnoj modeli po raschetu razlichnyh parametrov. Poluchennye rezul'taty byli otpechatany obychnym

  20. Pathogenesis of Intrapulmonary Haemorrhage in Dogs Exposed to Pulsed Fission-Spectrum Neutrons; Pathogenese de l'Hemorragie Intrapulmonaire chez des Chiens Exposes a des Neutrons de Fission Pulses; Patogenez vnutrilegochnykh krovoizliyanij u sobak pri obluchenii impul'snymi nejtronami spektra deleniya; Patogenesis de la Hemorragia Intrapulmonar en Perros Expuestos a Neutrones de Fision Pulsados

    Energy Technology Data Exchange (ETDEWEB)

    Jones, R. K.; Engel, R. E.; Godden, W. R. [Kirtland AFB, New Mexico (United States)

    1964-05-15

    v et vej legochnoj arterii ot vorot legkih do poverhnosti plevry. Samye rannie gistologicheskie izmenenija v le gk i h nabljudalis' na + 5 -j den' i s o stojali iz fokusnyh, horosho ogranichennyh uchastkov giperemirovannyh a l'v eo l , otechnost' kletok jendotileja kapilljarov i vyhozhdenija jeritrocitov v nebol'shom kolichestve v polosti a l'veol. Jeti izmenenija stanovilis' generalizovannymi k + 9 -m u dnju i, krome t o go , nabljudalis' fokusnye uchastki peribronhial'nyh krovoizlijanij s vovlecheniem levogo i prav ogo glavnogo bronhov. Pri vskrytii zhivotnyh na 13-j den' posle obluchenija obnaruzheny obshirnye perivaskuljarnye krovoizlijanija s vovlecheniem krupnyh i melkih legochnyh arterial'nyh so sudov. Krov' pojavljalas' v adventicial'noj soedinitel'noj tkani i periarteri- al'nyh limfaticheskih prostranstvah. Otek jendotelija byl rezko vyrazhen v porazhennyh sosudah, no v sredinnoj obolochke zametnyh izmenenij ne bylo. Obnaruzhivalis' takzhe peribronhial'nye krovoizlijanija v sochetanii s porazheniem vetvej le gochn oj arterii. Patogenez jetih povrezhdenij, po-vidimomu, svjazan s pervichnym porazheniem jendotelija, vyzvannym impul'snymi nejtronami spektra delenija. Dopolnitel'nym faktorom, vozmozhno, javljaetsja trombocitopenija, poskol'ku okazalos', chto kolichestvo megakariocitov v kostnom m o z gu bylo obratno proporcional'no tjazhesti vnutrilegochnyh krovoizlijanij. (author)

  1. Method of obtaining concentrated preparations of Cl{sup 36} and Br{sup 82} by recoil nuclei under exposure to high-density neutron fields; Preparation de composes du chlore-36 et du brome-82 de haute activite specifique, par exposition de noyaux de recul a des champs neutroniques intenses; Poluchenie kontsentrirovannykh preparatov Cl{sup 36} i Br{sup 82} metodom yader otdachi pri obluchenii v nejtronnykh polyakh vysokoj plotnosti; Obtencion de compuestos de cloro-36 y de bromo-82 de alta actividad especifica por retroceso de nucleos en campos neutronicos intensos

    Energy Technology Data Exchange (ETDEWEB)

    Kurchatova, L N; Kurchatov, B V

    1962-01-15

    resultado de la superposicion de toda una serie de procesos : formacion de atomos de cloro radiactivo, separacion radiolitica del haluro, difusion de los productos obtenidos en la red cristalina del carbono, su sorcion en la superficie y su recombinacion en distintos centros. La extraordinaria variedad de condiciones en que se forman e interaccionan los productos de irradiacion con el esqueleto carbonico y su superficie depende de un gran numero de factores, a saber : la estructura ultramicroscopica, la naturaleza de los nuevos compuestos, que estan relacionados con el tipo de compuestos superficiales, la existencia en la superficie del carbono de centros con un espectro continuo de energia de sorcion, la probable formacion de diversos centros estacionarios de recombinacion por irradiacion del carbono, etc. Por ello, las tecnicas utilizadas ofrecen la posibilidad de realizar una gran variedad de experimentos a fin de establecer las condiciones optimas de enriquecimiento. (author) [Russian] Klassicheskij metod polucheniya kontsentrirovannykh radioaktivnykh preparatov Stsilarda-CHalmersa obychno rassmatrivaetsya kak malo ehffektivnyj pri ispol'zovanii bol'shikh integral'nykh potokov nejtronov iz-za znachitel'nogo razlozheniya obluchaemogo soedineniya pod dejstviem radiatsii. Avtorami najdeny soedineniya broma i khlora s uglerodom, pozvolyayushchie poluchat' sushchestvennoe obogashchenie radioaktivnymi izotopami khlora i broma metodom yader otdachi pri obluchenii v nejtronnykh potokakh poryadka 10{sup 13} nejtr./sek-cm{sup 2}. EHti soedineniya otvechayut formule C{sub n}X, gde X-Cl ili Br, N = 10 + 20 dlya soedineniya khlora i 25 + 70 -dlya soedinenij broma. Oni dostatochno ustojchivy termicheski i khimicheski. Soedinenie sostava C{sub 30}Br vyderzhivaet nagrevanie do 300{sup o}C v atmosfere argona bez otshchepleniya broma; ono razlagaetsya polnost'yu pri temperature 600{sup o}C. Ukazannoe soedinenie broma s uglerodom prakticheski ustojchivo k vozdejstviyu vodnykh rastvorov

  2. The Role of Exponential and PCTR Experiments at Hanford in the Design of Large Power Reactors; Roles Respectifs des Experiences Exponentielles et du Reacteur d'Etude des Constantes Physiques de Hanford dans les Etudes de Grands Reacteurs de Puissance; Znachenie ehksponentsial'nykh opytov i opytov na reaktore PCTR pri proektirovanii bol'shikh ehnergeticheskikh reaktorov v khehnforde; Papel de los Experimentos Exponenciales y del Reactor PCTR de Hanford en el Proyecto de Grandes Reactores de Potencia

    Energy Technology Data Exchange (ETDEWEB)

    Heineman, R. E. [General Electric Company, Richland, WA (United States)

    1964-02-15

    introduccion de cambios en el manejo de los reactores ya existentes, como instrumentos de investigacion en la esfera de la fisica de los reactores y como medio de ensenanza. Compara tambien los capitales invertidos en esas instalaciones y los gastos de explotacion. Describe el perfeccionamiento de nuevas tecnicas experimentales que estas instalaciones permiten aplicar con miras a satisfacer la demanda de nuevos datos experimentales. Es menester tener presentes todos estos datos para poder predecir la evolucion de las necesidades y las tendencias futuras en el empleo de estas instalaciones para los estudios de los reactores de potencia. La memoria describe sucintamente el reactor para el estudio de constantes fisicas e indica la manera en que se piensa utilizarlo en el marco de esa evolucion. (author) [Russian] V Hjen- fordskih laboratorijah v techenie pochti 15 let provodjatsja jeksponencial'nye reaktornye iz- merenija na grafito-uranovyh reshetkah. Hotja rezul'taty jetih opytov ispol'zovalis' dlja opredelenija laplasianov predlagaemyh proizvodjashhih reaktorov, oni takzhe sodejstvovali razvitiju ponimanija fiziki reaktorov jetih sistem. Davno priznano, chto poleznost' kri- ticheskogo opyta ogranichena vvidu ego bol'shogo masshtaba i nedostatochnoj chuvstvitel'nosti v otnoshenii nebol'shih lokalizovannyh narushenij sistemy. Zatem mysl' byla napravlena na sozdanie cel'nogo opytnogo reaktora, v kotorom bylo by svedeno do minimuma kolichest- vo materialov, neobhodimyh dlja poluchenija nuzhnyh dannyh. Jeta popytka privela k postrojke usovershenstvovannoj kriticheskoj ustanovki s neskol'kimi zonami reaktora dlja izmerenija fizicheskih konstant PCTR. Ustanovka ispol'zuetsja dlja okazanija sodejstvija pri razrabot- ke proekta po fizike reaktorov dlja neskol'kih jenergeticheskih reaktorov. Krome togo,re- aktor RSTNjavljaetsja ustanovkoj obshhego naznachenija dlja provedenija izmerenij poperechnyh sechenij na reaktore i dlja opredelenija differencial'nyh i integral'nyh fizicheskih para

  3. Determination on Mice and other Organisms of the RBE of High-Energy Protons and Electrons; Efficacite Biologique Relative sur la Souris et d'Autres Organismes des Protons et des Electrons De Haute Energie; Opredelenie obeh pri obluchenii myshej i drugikh organizmov protonami i ehlektronami vysokikh ehnergij; Determinacion de la Eficacia Biologica Relativa de los Protones y de los Electrones de Elevada Emergia en el Raton y en Otros Organismos

    Energy Technology Data Exchange (ETDEWEB)

    Bonet-Maury, P.; Baarli, J.; Kahn, T.; Dardenne, G.; Frilley, M.; Deysine, A. [Institut du Radium, Paris (France)

    1964-03-15

    {sub 50}, supervivencia media, reduccion del timo y de los testiculos) es proxima a 1; esta EBR corresponde al valor medio de la transferencia lineal de energia (TLE) de las particulas y, en el caso de los protones, no parece que sufra aumento alguno por efecto del valor local mas elevado del TLE de las 'estrellas' de espalacion. (author) [Russian] Izuchalis' obshhie jeffekty pri obluchenii myshej letal'nymi dozami protonov s jenergiej 157 i 592 Mjev i jelektronov s jenergiej 150 i 950 Mjev. {gamma} obluchennyh zhivotnyh nabljudalis te zhe obshhie simptomy, chto i posle rentgenovskogo i gamma-obluchenija. S pomoshh'ju primenennyh biologicheskih testov ne bylo o b naruzheno nikakih fenomenov, specifichnyh dlja chastic vysokih jenergij. Ustanovlennaja po chetyrem pokazateljam OBJe (LD-50, srednjaja vyzhivaemost', umen'shenie zobnoj zhelezy i semennikov) malo otklonjaetsja ot 1 ; jeta OBJe so o tvetstvue t srednej LPE chastic, i dlja protonov ne kazhetsja uvelichennoj za schet povyshenija mestnogo LPE zvezd raspada. (author). (author)

  4. Diagnosis of Intracranial Lesions by Gamma-Encephalography using Human Serum Albumin Labelled with Iodine-131; Diagnostic des lesions intracraniennes par la gamma-encephalographie a l'aide de la serumalbumine humaine marquee a l'iode 131; Diagnoz vnutricherepnykh povrezhdenij putem gamma-ehntsefalografii pri pomoshchi mechenoj iodom-131 albuminovoj syvorotki cheloveka; Diagnostico de las lesiones intracraneanas por gammaencefalografia mediante sero- albumina humana marcada con yodo-131

    Energy Technology Data Exchange (ETDEWEB)

    Planiol, Therese [Institut National d' Hygiene, Paris (France)

    1959-07-01

    reconocimiento son tumores de los hemisferios y la otra mitad, tumores de la fosa posterior y pinealomas. Con este metodo pueden observarse los abcesos, los hematomas y los aneurismas cirsoides. Los accidentes cerebro-vasculares han originado en la tercera parte de los casos anomalias en los graficos; la mitad de los graficos anormales presenta el aspecto caracteristico de los reblandecimientos (o trombosis), lo cual permite su diagnoestico; el resta de los graficos es semejante a los graficos tumorales, siendo la unica diferencia que, en caso de accidente vascular, las anomallas desaparecen despues de algunas semanas; las dos terceras partes de estas lesiones dan un gammaencefalogram a negativo. Los aneurismas arteriales, los centros epileptoegenos no tumorales y las distintas afecciones puramente neurologicas presentan resultados normales en el 96 por ciento de los casos. La exploration del cerebro mediante albumina radiactiva puede suministrar informaciones de gran valor, no solo respecta de la existencia de una lesion neuro-quirurgica y su localizacion exacta, sino tambien respecto de su naturaleza. En particular, facilita grandemente el diagnostico de un meningeoma, de un glioblastoma o de metastasis. Esta, ademas de las informaciones relativas al diagnoestico positivo y topografico, hace que este procedimiento sea uno de los metodos mas interesantes de diagnostico neurologico. Por otra parte, la gammaencefalografia constituye uno de los medios mas seguros de descubrir la reaparicion de estas enfermedades y de observar los efectos de una terapeutica medica o de un tratamiento radioterapico. (author) [Russian] 600 chelovek bylo podvergnuto obsledovaniyu pri pomoshchi albuminovoj syvorotki, mechenoj iodom-131, prichem izmerenie radioaktivnosti provodilos' soedinennymi s cherepnoj korobkoj stsintyalitsionnym ischetchikami v dva priema: sperva spustya dva chasa i zatem dvadtsat' chetyre chasa posle radioaktivnoj in{sup e}ktsii. Iz sta semidesyati pyati vnutricherenykh opukholej

  5. Nuclear ground state

    International Nuclear Information System (INIS)

    Negele, J.W.

    1975-01-01

    The nuclear ground state is surveyed theoretically, and specific suggestions are given on how to critically test the theory experimentally. Detailed results on 208 Pb are discussed, isolating several features of the charge density distributions. Analyses of 208 Pb electron scattering and muonic data are also considered. 14 figures

  6. Color van der Waals force acting in heavy-ion scattering at low energies

    International Nuclear Information System (INIS)

    Hussein, M.S.; Lima, C.L.; Pato, M.P.; Bertulani, C.A.

    1990-01-01

    The influence of the color van der Waals force in the elastic scattering of 208 Pb on 208 Pb at sub-barrier energies is studied. The conspicuous changes in the Mott oscillation found here are suggested as a possible experimental test

  7. On the possible detection of quantum-mechanical interferences between gravitational forces and nucleus-nucleus Coulomb forces

    International Nuclear Information System (INIS)

    Silveira, R. da

    1996-07-01

    Possible effects of quantum-mechanical interferences between gravitational forces and the nucleus-nucleus Coulomb interaction are discussed. It is shown that, although very small, these effects could be measured using low energy scattering between identical heavy nuclei, e.g. for the system 208 Pb + 208 Pb (E L = 5 MeV). (author)

  8. A new closed form expression for the total reaction cross-section of heavy ions

    International Nuclear Information System (INIS)

    Rego, R.A.; Hussein, M.S.

    1989-02-01

    A new analytical expression for the HI total reaction cross-section which exhibits the macroscopic features of the transparency factor is derived. Comparison with optical model calculation are made for the 12 C+ 208 Pb and 16 O + 208 Pb at several energies. (author)

  9. Radius anomaly in the diffraction model for heavy-ion elastic scattering

    Science.gov (United States)

    Pandey, L. N.; Mukherjee, S. N.

    1984-04-01

    The elastic scattering of heavy ions, 20Ne on 208Pb, 20Ne on 235U, 84Kr on 208Pb, and 84Kr on 232Th, is examined within the framework of Frahn's diffraction model. An analysis of the experiment using the "quarter point recipe" of the expected Fresnel cross sections yields a larger radius for 208Pb than the radii for 235U and 232Th. It is shown that inclusion of the nuclear deformation in the model removes the above anomaly in the radii, and the assumption of smooth cutoff of the angular momentum simultaneously leads to a better fit to elastic scattering data, compared to those obtained by the earlier workers on the assumption of sharp cutoff. [NUCLEAR REACTIONS Elastic scattering, 20Ne+208Pb (161.2 MeV), 20Ne+235U (175 MeV), 84Kr+208Pb (500 MeV), 84Kr+232Th (500 MeV), diffraction model, nuclear deformation.

  10. Organizacija inžinjerijskih radova pri rušenju deonice puta / Organization of engineering works during demolition of a road section / Организация инженерных работ по демонтажу участков дорог

    Directory of Open Access Journals (Sweden)

    Nenad V. Kovačević

    2016-01-01

    Full Text Available Prilikom upotrebe minsko-eksplozivnih sredstava za rušenje elemenata, materijala i objekata jako je bitna organizacija izvođenja radova prilikom pripreme i u toku izvođenja samog rušenja. Za izvođenje ovih radova u Vojsci Srbije postoje specijalizovane i namenske jedinice. Radi se o jedinicama jedne od specijalnosti u okviru roda inžinjerije, pionirske specijalnosti, koje egzistiraju u okviru inžinjerijskih bataljona, odnosno brigada KoV. Organizacija inžinjerijskih radova zapravo predstavlja iznalaženje najcelishodnijeg rešenja u pogledu upotrebe pokretnih stvari, ali i naprezanja ljudstva, pri rušenju konkretnog objekta – deonice puta. Pri tome veliki problem predstavlja literatura, a posebno norme za izvođenje radova, jer izuzev nekoliko skripti za internu upotrebu, sve se svodi na literaturu iz sedamdesetih ili početak osamdesetih godina prošlog veka. Posebno je razrađena primena mera zaštite prilikom upotrebe eksploziva. / When using explosive ordnance for the demolition of elements, materials and facilities, organization is very important in the preparation of works as well as during demolition itself. In the Army of Serbia, for this kind of works, there are specialized expert units within Land Forces engineering battalions or brigades. The organization of the engineering work given in the article is a purposeful solution, regarding the use of movable property and stress imposed on people as well, when performing demolition of a concrete structure - road section. Lack of literature is a big drawback, especially lack of norms for demolition works. Except for some unofficial lectures for internal use, most of the literature dates back to the seventies or early eighties. A special emphasis in this paper is given to the application of protective measures in the use of explosives. / В процессе применения минно-взрывных средств для сноса элементов, материалов

  11. Pointing Out Main Factors from Design, Construction and Operating Experience of Existing Nuclear Plants for Assisting in Shaping Future Nuclear Power Programmes; Les principaux criteres degages de l'etude, de la construction et de l'exploitation des centrales nucleaires existantes et leur interet pour l'elaboration des futurs programmes d'energie d'origine nucleaire; Ukazanie osnovnykh faktorov proektirovaniya, stroitel'stva i opyta ehkspluatatsii sushchestvuyutsikh atomnykh ehlektrostantsij, chto dolzhno pomoch' pri sostavlenii budushchikh programm atomnoj ehnergetiki; Principales consideraciones relativas al diseno, construccion y explotacion de centrales nucleares, encaminadas a facilitar la preparacion de programas futuros de energia nucleoelectrica

    Energy Technology Data Exchange (ETDEWEB)

    Dalla Volta, F. [Comitato Nazionale per l' Energia Nucleare, Rome (Italy)

    1963-10-15

    de tipo bien conocido, la memoria estudia en que medida estas instalaciones pueden construirse sin dificultades y satisfacer la demanda de la red; tambien en este aspecto se refiere al creciente papel que cabe atribuir en Italia a la energia nucleoelectrica. Por ultimo, la memoria re calca hasta que punto el acopio y la interpretacion de los datos relativos a las tres centrales nucleares que ahora comienzan a funcionar en Italia facilitarian el proyecto de instalaciones futuras. Alude a la posibilidad de establecer desde ya ciclos de combustible mas extensos. (author) [Russian] Rassmatrivayutsya naibolee vazhnye tekhnicheskie i ehkonomicheskie faktory, kotorye vyyavilis' pri proektirovanii, stroitel'stve i ehkspluatatsii pervykh promyshlennykh atomnykh ehlektrostantsij i kotorye mogut byt' ochen' poleznymi pri sozdanii v budushchem novykh atomnykh ehlektrostantsij, uchityvaya osoben-nosti uslovij v Italii. Nyneshnee sostoyanie tekhnologii proizvodstva i ee postoyannoe razvitie v khode osushchestvleniya proektov pokazali sushchestvovanie opredelennoj tendentsii k snizheniyu kak stoimosti toplivnogo tsikla, tak i stoimosti komponentov stantsii. Ehtomu takzhe blagopriyatstvuyut vozrastayushchaya tendentsiya k uvelicheniyu razmerov ehlektrostantsii i tot fakt, chto analiz ehnergeticheskogo prognoza ehnergosistemy govorit o nalichii blagopriyatnykh uslovij dlya stroitel'stva ehlektrostantsij bol'shej moshchnosti na yadernom toplive vmesto stantsij na obychnom toplive, iskhodya iz predskazannykh izmenenij v stoimosti proizvodstva ehnergii, obuslovlennykh uvelicheniem kolichestva atomnykh ehlektrostantsij. Rassmatrivayutsya osnovnye faktory, kotorye dolrsny byt' uchteny v budushchem pri planirovanii ehlektrostantsij s uchetom takzhe grafikov stroitel'stva i ispytaniya. Opredelennyj upor sdelan na problemu protivoavarijnoj obolochki s uchetom takzhe spetsificheskikh uslovij Italii v otnoshenii nekotorykh aspektov ehtoj problemy; v rezul'tate udobnogo razmeshcheniya

  12. A Contribution to the Study of the Oxidation of Uranium Monocarbide in Carbonic Anhydride at High Temperatures; Contribution a l'etude de l'oxydation du monocarbure d'uranium dans l'anhydride carbonique aux temperatures elevees; Vklad v izuchenie voprosa okisleniya monokarbida urana v ugol'nom angidride pri povyshennykh temperaturakh; Contribucion al estudio de la oxidacion del monocarburo de uranio en anhidrido carbonico a temperaturas elevadas

    Energy Technology Data Exchange (ETDEWEB)

    Desrues, R; Paidassi, J.; Darras, R. [Centre d' Etudes Nucleaires, Saclay (France)

    1963-11-15

    monocarburo, sea que provengan del uranio o bien del dicarburo, disminuye la resistencia de este compuesto a la oxidacion; ello puede atribuirse sobre todo al hecho de que aquellas sufren una oxidacion muy seria, especialmente a raiz de las tensiones mecanicas que causa. 3. En todos los casos, el proceso de oxidacion puede caracterizarse por una energia de activacion igual a 29 000 cal/M, valor muy proximo al correspondiente a la oxidacion del uranio metalico en el mismo gas y a la difusion del oxigeno en el oxido de uranio (UO{sub 2}) que se forma. (author) [Russian] Obraztsy monokarbida urana, poluchennogo dvumya razlichnymi metodami, i obraztsy ker- meta sostava 96,7 ves% U-3,3 ves% S podvergalis' dejstviyu ugol'nogo angidrida, tshchatel'no ochishchennogo ot kisloroda i vodyanykh parov, v intervalakh 350 - 600 deg. C, i nablyudalos' ikh okislenie odnovremenno mikrograficheskim i gravimetricheskim sposobami pri pomoshchi termovesov Ehjro. Bylo otmecheno sleduyushchee: 1) Krivye vyrazhayut uvelichenie vesa kak funktsiyu vremeni i vnachale nosyat yarko vyrazhennyj linejnyj kharakter, zatem bystro vozrastayut, chto ob{sup y}asnyaetsya, v osnovnom,progressivnym razlozheniem obraztsov. Vprochem, poluchennye dannye uvelicheniya vesa yavlyayutsya bolee nizkimi chem te, kotorye byli opublikovany do nastoyashchego vremeni, chto sleduet, ochevidno, pripisat' bolee vysokoj chistote upotreblennogo ugol'nogo angitrida i ochen' neznachitel'noj poristosti ispol'zovannogo monokarbida urana. 2) Nalichie vklyuchenij v monokarbid, kotorye sootvetstvuyut uranu ili dikarbidu, umen'shaet stojkost' ehtogo materiala k okisleniyu, chto sleduet pripisat', glavnym obrazom,katastroficheskomu okisleniyu samikh vklyuchenij iz-za mekhanicheskikh svyazej. 3) Vo vsekh sluchayakh protsess okisleniya mozhet byt' okharakterizovan ehnergiej aktivatsii, ravnoj 29 000 kal/mol', velichinoj, ochen' blizkoj k toj, kotoraya sootvetstvuet okisleniyu metallicheskogo urana v tom zhe gaze i diffuzii kisloroda v okisi

  13. Preparation of C{sup 14}-labelled tetrazolium salts and tracer study of the tetrazene-formazan rearrangement; Preparation de sels de tetrazolium marques au carbone-14 et etude de la transposition tetrazene-formazan, au moyen d'indicateurs radioactifs; Izgotovlenie mechennykh C{sup 14} solej tetrazosoedinenij i issledovanie pri pomoshchi indikatorov peregruppirovok tetrazona-formazana; Preparacion de sales de tetrazolio marcadas con {sup 14}C y estudio de la transposicion tetraceno-formazan con ayuda de trazadores

    Energy Technology Data Exchange (ETDEWEB)

    Marton, Joseph; Meisel, Julia [Central Research Institute for Chemistry of the Hungarian Academy of Sciences, Budapest (Hungary); Gosztonyi, Thomas [Institute of Organic Chemical Technology, Technical University, Budapest (Hungary)

    1962-03-15

    etre isole dans des conditions appropriees. On a etudie cette transformation en utilisant du benzaldehyde-phenylhydrazone marque au carbone-14, et l'on a pu verifier ainsi qu'il s'agit d'une reaction intramoleculaire. (author) [Spanish] Partiendo del benzaldehido-(1-{sup 14}C), el autor ha sintetizado el TTC-(5-{sup 14}C), el NT-(5, 5'-di-{sup 14}C) (neotetrazolio) y el BT- (5, 5'-di-{sup 14}C) (azul de tetrazolio). Las sales de mono- o ditetrazolio se obtienen con buen rendimiento y se logran productos de elevada actividad especifica. El autor determino la pureza de las muestras por cromatografia sobre papel. En las sales de ditetrazolio encontro algunas impurezas, que consiguio determinar cuantitativamente; asimismo establecio algunas caracteristicas de sus estructuras. Por otra parte, elaboro un metodo para obtener sales de ditetrazolio marcadas con {sup 14}C de elevada pureza. En la sintesis del formazan, el precursor de la sal de tetrazolio, se obtiene un producto intermedio inestable cuya estructura es similar a la del tetraceno. Este compuesto sufre una rapida transposicion en medio alcalino para dar lugar al formazan. Es posible aislar el producto intermedio si se trabaja en condiciones adecuadas. El autor estudia la transposicion utilizando la fenilhidrazona del benzaldehido marcado con {sup 14}C, y ha podido comprobar que se trata de una reaccion intramolecular. (author) [Russian] Iskhodya iz benzal'degida - [1-C{sup 14}] udalos' izgotovit' [5-C{sup 14}]-TTC, [5,5'di-C{sup 14}]-NT (neoterazolij) [5,5'di-C{sup 14}]-BT (sinij tetrazolij). Vykhody kak dlya monotetrazoliya, tak i dlya ditetrazoliya dostatochno znachitel'ny i produkty mogut byt' polucheny s bol'shoj udel'noj aktivnost'yu. Stepen' chistoty obraztsov byla issledovana pri pomoshchi khromatograficheskoj bumagi. V solyakh ditetrazoliya bylo obnaruzheno nekotoroe kolichestvo primesej, chto pozvolilo vyvesti zaklyucheniya otnositel'no ikh struktury i kolichestva. Byl vyrabotan metod mechennykh C{sup 14

  14. Plasma Equilibrium in a Torus with High-Frequency Fields and Plasma Heating Resulting from the Development of a Powerful Beam of ''Escaping Electrons''; Plasma Torique: Stabilisation au Moyen de Champs de Haute Frequence et Chauffage par Formation d'un Flux Intense d'Electrons 'Emballes'; Ehksperimental'noe issledovanie ravnovesiya plazmy v tore pri nalichii vysokochastotnykh polej i nagreva plazmy za schet razvitiya moshchnogo puchka ''ubegayushchikh ehlektronov''; Equilibrio del Plasma en un Toro, en Presencia de Campos de Alta Frecuencia, y Calentamiento del Plasma por el Desarrollo de un Haz Potente de 'Electrones Desbocados '

    Energy Technology Data Exchange (ETDEWEB)

    Demirkhanov, R. A.; Kirov, A. G.; Stotland, M. A.; Malykh, N. I.; Horasanov, G. L.; Vishnevskij, N. K.; Gutkin, T. I.; Jampol' skij, I. R. [Fiziko-Tehnicheskij Institut Gosudarstvennogo Komiteta po Ispol' zovaniju Atomnoj Ehnergii SSSR, Sukhumi, SSSR (Russian Federation)

    1966-04-15

    la corriente, es decir, en 1 {mu}s, aproximadamente, es de unos 20 J, lo que indica que la conductividad del plasma es anormalmente pequena. Cuando el calentamiento se efectua por un campo electrico intenso, se observa una fuerte emision de rayos X, cuya energfa es del orden de 100 keV, acompanada por radiacion parasita de microondas, de frecuencias proximas a la del plasma. (author) [Russian] Daetsja opisanie jeksperimentov, provedennyh na ustanovke ''RT-0''. Ustanovka predstavljaet soboj tor s bol'shim diametrom 100 sm i malym - 10 sm. Vdol' kamery sozdaetsja toroidal'noe magnitnoe pole velichinoj okolo 6 * 10{sup 3} je. Plazma podzhigaetsja pri davlenii R Greater-Than-Or-Equal-To 5 * 10{sup -4} tor posredstvom prodol'nogo vihrevogo jelektricheskogo polja (f = 8,3 Mgc). Imeetsja vrashhajushheesja po malomu diametru vysokochastotnoe (f = 540 kgc) kvadrupol'noe pole s H{sub {phi}} =200 je u stenok kamery. Pri razrjade batarei maloinduktivnyh kondensatorov na vitki, ulozhennye vdol' tora, v ob{sup e}me kamery mozhet generirovat'sja vihrevoe jelektricheskoe pole zatuhajushhego tipa s maksimal'noj naprjazhennost'ju E{sub z} =200 v/sm pri dlitel'nosti poluperioda okolo 1 mksek. Cel'ju jeksperimentov javljaetsja: 1) vyjasnenie ravnovesija i stabilizacii plazmy v kvazipostojannom toroidal'nom magnitnom pole s pomoshh'ju vrashhajushhihsja mul'tipol'nyh vysokochastotnyh polej, predpolagaja, chto sila toroidal'nogo drejfa, ravnaja Tilde-Operator (r/R)nkT dolzhna kompensirovat'sja davleniem jelektromagnitnoj volny H{sup 2}/8{pi} 2) issledovanie nagreva plazmy za schet dissipacii ''puchkovoj'' neustojchivosti, vozbuzhdaemoj moshhnym potokom 'ubegajushhih jelektronov' pri jelektricheskih poljah v plazme E{sub z} >> E{sub c} Na ustanovke provodilis': a) mikrovolnovye izmerenija plotnosti plazmy s pomoshh'ju interferometra s dlinoj volny {lambda} = 2 mm i nabljudenie granicy plazmy po otrazhennomu signalu na volne {lambda} = 17 mm; b) registracija provedenija linii vo vremeni i

  15. The Role of Non-Destructive Testing in Test-Reactor Operation at the National Reactor Testing Station; Role des Essais Non Destructifs dans l'Exploitation des Reacteurs d'Essai au Centre National d'Essais de Reacteurs; Rol' nedestruktivnykh ispytanij pri ehkspluatatsii ispytatel'nykh reaktorov na natsional'noj stantsii po ispytaniyam reaktorov; Papel de los Metodos No Destructivos en la Explotacion de los Reactores de la National Reactor Testing Station

    Energy Technology Data Exchange (ETDEWEB)

    Francis, W. C.; Brown, E. S.; Burdick, E. E.; Gibson, G. W.; Tingey, F. H. [Phillips Petroleum Company, Atomic Energy Division, Idaho Falls, Idaho (United States)

    1965-10-15

    corrientes de Foucault. Otras tecnicas que han demostrado su utilidad son la inspeccion por penetracion de liquidos, los ensayos con nitrogeno liquido para detector grietas superficiales, los ensayos de recocido termico para determinar ampollas, y la exploracion gamma de placas irradiadas. Muestras de elementos combustibles tomadas estadisticamente se ensayan por metodos hidraulicos para confirmar su integridad estructural, especialmente la estabilidad de la union entre la placa combustible y la placa lateraL Constantemente se intenta mejorar las tecnicas actuales y perfeccionar nuevos procedimientos de inspeccion de caracter no destructivo. (author) [Russian] Bol'shie kapitalovlozhenija (bolee 100 mln. doll. ) v jadernye opytnye reaktory pri Nacional'noj labo- ratorii po ispytaniju reaktorov i neobhodimost' jekspluatirovat' ih bezopasno trebujut vyso- kokachestvennogo kontrolja za reaktorami i opytnymi komponentami v osobennosti za topli- vom i upravljajushhimi sterzhnjami. Pojetomu nedestruktivnye ispytanija igrajut ochen' vazhnuju rol' v opredelenii kachestva jetih komponentov do togo , kak oni ispol'zujutsja na opytnyh reaktorah. Hotja mnogie iz jetih opytov provodjatsja po horosho otrabotannym programmam, tem ne menee bylo razrabotano mnogo unikal'nyh sposobov i shiroko ispol'zuetsja obychnoe oborudovanie. Dolgoe vremja ispol'zovalis' ul'trazvukovye metody v celjah obnaruzhenija rakovin, nediffuzioznosti teplovydeljajushhih jelementov i vnutrennih treshhin. V poslednee vremja jeta rabota byla rasprostranena na avtomaticheskoe skennirovanie krivyh plastin i dlja o b - sledovanija obluchennyh toplivnyh plastin v kanalah dlja hranenija. Ves'ma interesnaja rabota byla provedena v dele primenenija ul'trazvuka dlja obnaruzhenija razryva hrupkih aktivnyh zon, kotoryj mozhet vozniknut' v prcesse izgotovlenija. Metod gamma-skennirovanija dlja opredelenija soderzhanija urana-235 v toplivnyh jele- mentah okazalsja nastol'ko nadezhnym, chto on javljaetsja osnovoj dlja podscheta

  16. Composition and Vacancy Flux Effects in Tracer Diffusion in Silver-Gold Alloys; Effets de la Composition et du Flux de Lacunes sur la Diffusion des Indicateurs dans les Alliages d'Or et d'Argent; Vliyanie sostava i potoka vakansij pri diffuzii indikatorov v splavakh serebra i zolota; Efectos de la Composicion y del Flujo de Huecos Sobre la Difusion de Indicadores en Aleaciones Plata-Oro

    Energy Technology Data Exchange (ETDEWEB)

    Meyer, R. O.; Slifkin, L. [University of North Carolina, Chapel Hill, NC (United States)

    1966-02-15

    desplazamiento del centro de masas correspondiente a la distribucion del indicador oro, la cual no sufre deformacion alguna puesto que D es practicamente independiente de la posicion. El indicador inerte, de particulas finas, permite localizar la interfase original con precision de algunos micrones. Los resultados obtenidos hasta febrero de 1965 senalan que el centro correspondiente a la distribucion del indicador oro se desplaza unos 20 {mu}m hacia el extremo rico en plata. (author) [Russian] Izuchenie samodiffuzii v splavah serebra s zolotom pokazy- vaet, chto jenergii aktivacii monotonno umen'shajutsja s uvelicheniem koncentracii zolota. Rezul'taty jetih issledovanij nel'zja ob{sup j}asnit' ishodja iz teorij, osnovannyh na sootvetst- vujushhih sostojanijah, vlijanii razmera ili teplote rastvorenija; odnako razvitaja Leklerom jelektrostatisticheskaja teorija Lazara pozvoljaet poluchit' polukolichestvennoe soglasie. Umen'shenie predjeksponencial'nyh faktorov s uvelicheniem koncentracii zolota ukazyvaet na to, chto jentropija vakansij dlja migracii linejno umen'shaetsja s izmeneniem sosta- va na 1,5 ROT chistogo serebra do chistogo zolota. V otnoshenii kazhdogo indikatora pri postojannoj temperature kojefficient diffuzii DE zavisimosti ot sostava pokazyvaet shirokij minimum. S pomoshh'ju jetih dannyh, ispol'zuemyh dlja proverki teorij vzaimodejst- vija mezhdu vakansiej i primes'ju, ustanavlivaetsja, chto tol'ko dannye Manninga i Lidiarda dajut udovletvoritel'nye i neprotivorechivye rezul'taty. Pribavlenie bolee podvizhnogo serebra k menee podvizhnomu zolotu fakticheski umen'shaet Bdlja oboih indikatorov; analiz pokazyvaet, chto prisutstvie atoma serebra, smezhnogo s vakansiej, i atoma zolota umen'- shaet chastotu skachka atoma zolota priblizitel'no na velichinzg 0,4. Nalichie shirokogo minimuma na grafike zavisimosti DOT sostava pozvoljaet issledo- vat' vlijanie potoka vakansii na diffuziju indikatora. Para Kirkendalla prigotovljaetsja iz sostavov, simmetrichno smeshhennyh

  17. Investigations of the chemical states of carrier-free phosphorus-32 as extracted into water from pile-irradiated sulphur; Recherches sur les etats chimiques du phosphore-32 sans entraineur obtenu par extraction aqueuse a partir de soufre irradie dans un reacteur; Issledovanie khimicheskogo sostoyaniya svobodnogo ot nositelya fosfora-32 pri izvlechenii ego v vodu iz obluchennoj v yadernom reaktore sery; Estudio de los estados quimicos del fosforo-32 libre de portador que se obtiene por extraccion acuosa del azufre irradiado en un reactor

    Energy Technology Data Exchange (ETDEWEB)

    Dahl, J B; Birkelund, O R [Institutt for Atomenergi, Kjeller, Lillestrom (Norway)

    1962-01-15

    nastoyashchem doklade dayutsya svedeniya otnositel'no khimicheskogo sostoyaniya fosfora-32 v vodnykh rastvorakh na razlichnykh stadiyakh prinyatogo v praktike protsessa polucheniya ehtogo ehlementa. Byli rassmotreny takzhe izmeneniya khimicheskogo sostoyaniya slozhnykh soedine- nij fosfora-32 v konechnykh produktakh v funktsii ot vremeni khraneniya. Bylo obnaruzheno, chto glavnym sostavlyayushchim veshchestvom yavlyaetsya fosfor-32, svyazan- nyj v vide ortofosfata. Po mere khimicheskoj obrabotki kolichestvo ortofosfata uvelichi- los' priblizitel'no s 70% pri nachale izvlecheniya i priblizitel'no do 98% v konechnom produkte svobodnogo ot nositelya fosfora-32. Ostatok sostoyal iz smesi piro-, tri-, tetra- i polifosfatov s dlinnoj tsep'yu (chislo P {>=} 5). Ni vo vremya obrazovaniya, ni vo vremya khraneniya v rastvorakh ne bylo obnaruzheno (kol'tseobraznykh) metafosfatov. EHti rezul'taty pokazyvayut, chto polifosfornye slozhnye soedineniya obrazovalis' v materiale misheni vo vremya oblucheniya. Osoboe vnimanie bylo obrashcheno na adsorbtsiyu svobodnogo ot nositelya fosfora-32 steklyannoj laboratornoj posudoj pri sushchestvuyushchikh ehksperimental'nykh usloviyakh. (author)

  18. Theoretical study on production of heavy neutron-rich isotopes around the N=126 shell closure in radioactive beam induced transfer reactions

    Directory of Open Access Journals (Sweden)

    Long Zhu

    2017-04-01

    Full Text Available In order to produce more unknown neutron-rich nuclei around N=126, the transfer reactions 136Xe + 198Pt, 136–144Xe + 208Pb, and 132Sn + 208Pb are investigated within the framework of the dinuclear system (DNS model. The influence of neutron excess of projectile on production cross sections of target-like products is studied through the reactions 136,144Xe + 208Pb. We find that the radioactive projectile 144Xe with much larger neutron excess is favorable to produce neutron-rich nuclei with charge number less than the target rather than produce transtarget nuclei. The incident energy dependence of yield distributions of fragments in the reaction 132Sn + 208Pb are also studied. The production cross sections of neutron-rich nuclei with Z=72–77 are predicted in the reactions 136–144Xe + 208Pb and 132Sn + 208Pb. It is noticed that the production cross sections of unknown neutron-rich nuclei in the reaction 144Xe + 208Pb are at least two orders of magnitude larger than those in the reaction 136Xe + 208Pb. The radioactive beam induced transfer reactions 139,144Xe + 208Pb, considering beam intensities proposed in SPIRAL2 (Production System of Radioactive Ion and Acceleration On-Line project as well, for production of neutron-rich nuclei around the N=126 shell closure are investigated for the first time. It is found that, in comparison to the stable beam 136Xe, the radioactive beam 144Xe shows great advantages for producing neutron-rich nuclei with N=126 and the advantages get more obvious for producing nuclei with less charge number.

  19. Fungal volatile compounds induce production of the secondary metabolite Sodorifen in Serratia plymuthica PRI-2C

    NARCIS (Netherlands)

    Schmidt, R. (Ruth); V. de Jager (Victor); Zühlke, D. (Daniela); Wolff, C. (Christian); J. Bernhardt (Jörg); Cankar, K. (Katarina); Beekwilder, J. (Jules); W.F.J. van IJcken (Wilfred); F. Sleutels (Frank); De Boer, W. (Wietse); Riedel, K. (Katharina); Garbeva, P. (Paolina)

    2017-01-01

    textabstractThe ability of bacteria and fungi to communicate with each other is a remarkable aspect of the microbial world. It is recognized that volatile organic compounds (VOCs) act as communication signals, however the molecular responses by bacteria to fungal VOCs remain unknown. Here we perform

  20. Fungal volatile compounds induce production of the secondary metabolite Sodorifen in Serratia plymuthica PRI-2C

    NARCIS (Netherlands)

    Schmidt, R.L.; de Jager, V.C.L.; Zühlke, D.; Wolff, C.; Bernhardt, J.; Cankar, Katarina; Beekwilder, J.; van Ijcken, W.; Sleutels, Frank; De Boer, W.; Riedel, K.; Garbeva, P.V.

    2017-01-01

    The ability of bacteria and fungi to communicate with each other is a remarkable aspect of the microbial world. It is recognized that volatile organic compounds (VOCs) act as communication signals, however the molecular responses by bacteria to fungal VOCs remain unknown. Here we perform

  1. Hyperfine structure investigations of Pr-I lines in the region 4200-4450 A

    Energy Technology Data Exchange (ETDEWEB)

    Siddiqui, Imran; Khan, Shamim; Tanweer Iqbal, Syed; Windholz, Laurentius [Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, A 8010 Graz (Austria)

    2012-07-01

    Praseodymium I spectral lines were investigated using laser induced fluorescence spectroscopy in a hollow cathode discharge lamp. The investigations led to the discovery of new Pr I energy levels of even and odd parity. A high resolution Fourier transform (FT) spectrum was used to extract promising excitation wavelengths. In the FT spectrum the investigated line 4375.53 A shows up as a narrow peak hfs with a weak SNR. Nevertheless, the line was excited and fluorescence signals were observed on 6 lines (4163 A, 4816 A, 5091 A, 5164 A, 5209 A, 5233 A). The hfs of the line was recorded by scanning the laser frequency and was fitted to obtain angular momentum J and hf constant A of the combining levels. We got J{sub up}=5/2, A{sub up}=1028.30 MHz, J{sub lo}=7/2 and A{sub lo}=861.46 MHz (the subscripts refer to upper and lower level). Assuming an unknown upper level, a known lower level was searched among the known levels having sufficient values of J and A. The level 7617.440 cm{sup -1}, even parity, J{sub lo}=7/2 and A{sub lo}=868 MHz fulfils these requirements. Using the center of gravity wave number of the line 4375.53 A and the energy of the lower level, the unknown upper level was calculated to have 30465.424 cm{sup -1}, odd parity, J{sub up}=5/2 and A{sub up}=1033(6) MHz.

  2. Bakteriološka zagađenost alginatnih otisaka i dimenzionalna stabilnost pri dezinfekciji

    OpenAIRE

    Broz, Mira; Romić, Željko; Omrčen, Ante; Fridrih, Sandra; Ropac, Darko

    1989-01-01

    Istraživanje mikrobiološke zagađenosti alginatnih otisaka nametnulo je potrebu primjene dezinficijensa prije slanja otisaka u laboratorij. Kao praktično zadovoljavajuće pokazalo se petminutno potapanje otisaka u razrjeđenju od 1:50 klorheksidin-glukonata. Postavljen je problem točnosti uzetog otiska nakon dezinfekcije s obzirom na mogućnost utjecaja dezinfeciejnsa na volumen otiska. Originalnom metodom mjerenja otisne mase dokazano je da promjena volumena i površine alginata nije značajna te ...

  3. Opredelenije obščego zemnogo ellipsoida pri uslovii V.V.Brovara

    Czech Academy of Sciences Publication Activity Database

    Burša, Milan; Vatrt, V.; Kouba, J.; Šíma, Zdislav; Jurkina, M. I.

    č. 11 (2002), s. 6-9 ISSN 0016-7126 Institutional research plan: CEZ:AV0Z1003909 Keywords : Earth's ellipsoid * determination * semimajor axis Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics

  4. Protection during work with ionizing radiation sources; Ochrana pri praci se zdroji ionizujiciho zareni

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-12-31

    The publication has been set up as a textbook for training courses dealing with health protection during work with ionizing radiation, designed for supervisory staff and persons directly responsible for activities which involve the handling of ionizing radiation sources. The book consists of a preface and the following chapters: (1) Fundamentals of ionizing radiation physics; (2) Quantities and units used in ionizing radiation protection; (3) Principles of ionizing radiation dosimetry; (4) Biological effects of ionizing radiation; (5) An overview of sources of public irradiation; (6) Principles and methods of health protection against ionizing radiation; (7) Examples of technical applications of sources of ionizing radiation; (8) Personnel and working environment monitoring; (9) Documentation maintained at sites with ionizing radiation sources; (10) Methods of personnel protection against external irradiation and internal radionuclide contamination; (11) Radiation incidents and accidents; (12) Health care of personnel exposed to the ionizing radiation risk; (12) Additional radiation protection requirements in handling radioactive substances other than sealed sources; (13) Measurement and metrology. (P.A.).

  5. UPORABA SPLOŠNIH PRAVIL CIVILNEGA PRAVA PRI SKLENITVI POGODBE O ZAPOSLITVI

    OpenAIRE

    Poredoš Tropenauer, Nataša

    2011-01-01

    Zgodovinsko gledano, je bilo delovno pravo del civilnega prava. Uveljavljeno je bilo stališče, da delovno razmerje nastane s službeno pogodbo, s katero se je ena stranka za plačilo, zavezala drugi stranki nekaj dati, storiti, dopustiti. Z razvojem kapitalizma pa je postala pomembna tudi delavčeva osebnost, prav tako se je v delovno razmerje začela vmešavati država. Delovno pravo je postalo del javnega in ne več samo zasebnega prava. Delovno razmerje med delavcem in delodajalcem nastane ...

  6. Biological dosimetry in case of combined radiation injuries. Biologicheskaya dozimetriya pri kombinirovannykh radiatsionnykh porazheniyakh

    Energy Technology Data Exchange (ETDEWEB)

    Vladimirov, V G; Teslenko, V M

    1990-11-01

    The state of biological dosimetry methods and prospects for their development are considered. Attention is paid to biological indicators of radiation injuries caused by nuclear weapons. It is noted, that determination of the number of lymphocytes in the blood in case of combined radiation injuries should be concerned with great care and in each case the analysis results should reffered to critically and supported by the data from other investigations. Promissing are the methods related to dermination of reticulocyte number in the peripheral blood within the irradiation dose range, causing bone marrow form of radiation syndrome, method of leukocyte adhesion and some other methods based on the change of biophysical caracteristics of cell membranes. To increase the information efficiency it is necessary to combine these methods with the methods, based on genetic change registration, and to develop a combined method.

  7. VIDEOIGRE KOT DIDAKTIČNI PRIPOMOČEK PRI POUKU SLOVENSKEGA JEZIKA IN KNJIŽEVNOSTI

    OpenAIRE

    Čeh, Aleš

    2016-01-01

    Videoigre so trenutno najpomembnejši medij v zabavni industriji 21. stoletja. Njihova pot je bila tlakovana s številni težavami in neprilikami, zlasti v splošni družbeni recepciji, saj jih je strokovna in splošna javnost dolgo časa (in jih ponekod še) obravnavala kot nekoristne, občasno celo škodljive. Slednje seveda ni absolutno res, ni pa tudi popolnoma ovrgljivo. Videoigre so prav tako kot drugi mediji izjemno širok pojem, med njimi najdemo tako estetsko izjemno dovršene umetniške naslove,...

  8. Testikulárna degenerácia pri Huntingtonovej chorobe

    Czech Academy of Sciences Publication Activity Database

    Bohuslavová, Božena; Mačáková, Monika

    2015-01-01

    Roč. 25, č. 1 (2015), s. 8-10 ISSN 1210-1737 R&D Projects: GA MŠk ED2.1.00/03.0124; GA MŠk(CZ) 7F14308 Institutional support: RVO:67985904 Keywords : Huntington ´s disease * testes * sperm Subject RIV: EB - Genetics ; Molecular Biology

  9. ODPADNI MATERIALI PRI LIKOVNIH DEJAVNOSTIH S PODROČJA KIPARSTVA V PREDŠOLSKEM OBDOBJU

    OpenAIRE

    Pejčić, Lidija

    2014-01-01

    Živimo v času tehnološkega napredka in rasti svetovnega prebivalstva, ki hkrati za svoj obstoj ustvarjata v okolju neugodne posledice. Sedanje ekološko stanje nas spodbuja k razmišljanju in reševanju položaja, v katerega je zabredel človek s sodobnim, a za naravo ogrožajočim načinom življenja. Narava je izčrpana od posegov vanjo, okolje pa je prepolno z negativnimi vplivi materialnega obilja. Človek mora najti zagon in poti, da bo izboljšal kakovost življenja zase in za prihodnje rodov...

  10. IKONIČNE REPREZENTACIJE NEKATERIH MATEMATIČNIH POJMOV PRI OSNOVNOŠOLCIH

    OpenAIRE

    Podgoršek, Manja

    2015-01-01

    Ikonične reprezentacije so reprezentacije, ki predstavljajo prehod med enaktivnimi in simbolnimi reprezentacijami. Ikonične reprezentacije matematičnih pojmov na razredni stopnji so v veliki večini primerov grafične. V magistrski nalogi smo s pomočjo preizkusa znanja želeli ugotoviti, na kakšen način učenci od 5. do 8. razreda osnovne šole grafično ponazarjajo vnaprej podane matematične pojme (odštevanje s prehodom, številski izraz z oklepaji, izraz dela celote in potenca). Zanimalo nas je tu...

  11. Complex urbarchitectonic structures of Priština and Novi Pazar cities

    OpenAIRE

    Beganović Džemila

    2014-01-01

    Contemporary urban development has changed the traditional cities all over the world. In our region, the typical Balkan cities of oriental origin, structure and outlook were almost totally transformed in the second half of the 20th century. Modern movement brought new models of urban organization, different communication concepts and a variety of concepts of modern buildings. Among others, the idea of complex urbarchitectonic structures in urban tissue spre...

  12. VRIJEDNOST KARBOKSITERAPIJE PRI LIJEČENJU KRONIČNE RANE POTKOLJENICE

    OpenAIRE

    KOVAČEVIĆ, JADRANKA; SINOŽIĆ, TAMARA

    2015-01-01

    Karboksiterapija je potporna metoda liječenja kroničnih rana koja se provodi kutanim ili subkutanim ubrizgavanjem medicinskog ugljičnog dioksida (Co2). osnovni princip djelovanja ubrizganog plina Co2 je korekcija tkivne hipoksije temeljem Bohrovog efekta. Djelujući na endotelne faktore rasta potiče neoangiogenezu te stimuliraju ibroblaste na sintezu kolagena što sve zajedno dovodi do boljeg zacjeljivanja rana. Brojna su područja primjene karboksiterapije: od liječenja kroničnih rana, bolesti ...

  13. Student Scientific Conference PriF UK 2011. Proceedings of reviewed contributions

    International Nuclear Information System (INIS)

    Galambos, M.; Dzugasova, V.

    2011-01-01

    The conference included the following sections: (i) Biology (336 contributions); (ii) Chemistry (56 contributions); (iii) Didactics (6 contributions); (iv) Environmental Science (30 contributions); (v) Geography (38 contributions); (vi) Geology (50 contributions); Contributions relevant of INIS interest have been inputted to INIS.

  14. Presoja notranjih kontrol pri obračunu davka na dodano vrednost na primeru "Podjetja x"

    OpenAIRE

    Majcen, Borut

    2016-01-01

    Poslovanje podjetja si je ob odsotnosti notranjih kontrol nemogoče predstavljati. Podjetja so podvržena raznim tveganjem, še posebej v današnjih razmerah globalnega poslovanja, ko se podjetja soočajo z vedno novimi izzivi, kar prinaša tudi nova tveganja. Najučinkovitejši ukrep za obvladovanje tveganj predstavlja vzpostavitev sistema notranjih kontrol. Obvladovanje tveganj pa ne poteka samo na ravni podjetja kot celote, ampak je prisotno na vseh področjih delovanja podjetja, torej tudi na p...

  15. Uporaba načel vitke proizvodnje pri proizvodnji žarometov

    OpenAIRE

    Šverko, Marko

    2012-01-01

    Magistrsko delo obravnava možnost uvajanja principov vitkosti v proizvodnji avtomobilskih žarometov. Uvodoma so strnjeno obdelani nekateri sodobni koncepti modeliranja in vodenja proizvodnih procesov. Podana je primerjava glavnih poudarkov in identificirane so stične točke med njimi. Vitka proizvodnja je v nadaljevanju obravnavana bolj poglobljeno. Opisani so glavni gradniki sistema vitke proizvodnje in priporočeni pristopi k uvajanju vitkosti v organizacije. Glavno vodilo vit...

  16. Student Scientific Conference PriF UK 2014. Proceedings of reviewed contributions

    International Nuclear Information System (INIS)

    Galambos, M.; Dzugasova, V.

    2014-01-01

    The conference included the following sections: (i) Biology (159 contributions); (ii) Chemistry (54 contributions); (iii) Geology (25 contributions); (iv) Geography (35 contributions); (v) Didactics (7 contributions); (vi) Environmental Science (28 contributions);) Contributions relevant of INIS interest have been inputted to INIS.

  17. Student Scientific Conference PriF UK 2017. Proceedings of reviewed contributions

    International Nuclear Information System (INIS)

    Galambos, M.; Dzugasova, V.; Bobovska, A.

    2017-01-01

    The conference included the following sections: (i) Biology (132 contributions); (ii) Chemistry (52 contributions); (iii) Geology (33 contributions); (iv) Geography (15 contributions); (v) Didactics (4 contributions); (vi) Environmental Science (9 contributions);) Contributions relevant of INIS interest (42 contributions) has been inputted to INIS.

  18. Student Scientific Conference PriF UK 2013. Proceedings of reviewed contributions

    International Nuclear Information System (INIS)

    Galambos, M.; Dzugasova, V.

    2013-01-01

    The conference included the following sections: (i) Biology (154 contributions); (ii) Chemistry (60 contributions); (iii) Geology (15 contributions); (iv) Geography (32 contributions); (v) Didactics (11 contributions); (vi) Environmental Science (25 contributions);) Contributions relevant of INIS interest has been inputted to INIS.

  19. Student Scientific Conference PriF UK 2016. Proceedings of reviewed contributions

    International Nuclear Information System (INIS)

    Galambos, M.; Dzugasova, V.; Sevcovicova, A.; Bobovska, A.

    2016-01-01

    The conference included the following sections: (i) Biology (122 contributions); (ii) Chemistry (62 contributions); (iii) Geology (25 contributions); (iv) Geography (14 contributions); (v) Didactics (5 contributions); (vi) Environmental Science (12 contributions);) Contributions relevant of INIS interest (53 contributions) has been inputted to INIS.

  20. Student Scientific Conference PriF UK 2015. Proceedings of reviewed contributions

    International Nuclear Information System (INIS)

    Galambos, M.; Dzugasova, V.; Sevcovicova, A.

    2015-01-01

    The conference included the following sections: (i) Biology (154 contributions); (ii) Chemistry (52 contributions); (iii) Geology (27 contributions); (iv) Geography (29 contributions); (v) Didactics (6 contributions); (vi) Environmental Science (27 contributions);) Contributions relevant of INIS interest has been inputted to INIS.

  1. GEODETSKE MERITVE IN ČASOVNO PLANIRANJE MONITORINGA PRI GRADNJI GARAŽNE HIŠE

    OpenAIRE

    Žižek, Marko

    2011-01-01

    Diplomska naloga pokriva problematiko geodetskih kontrolnih meritev (monitoringa) med gradnjo. Glavni cilj diplomske naloge je prikazati metode monitoringa in različne metode geodetskega merjenja. Podrobno sta opisani merski metodi niveliranja in tahimetrije, kot tudi instrumenti, ki jih uporabljamo. Predstavljena je metoda niveliranja na konkretnem primeru in sicer gra za objekt garažne hiše v centru mesta Maribor. V nalogi je tudi predstavljen terminski plan samih meritev. Plan je prikazan ...

  2. Depresivnost in anksioznost pri mladostnikih z različnimi duševnimi motnjami:

    OpenAIRE

    Groleger, Urban; Strah-Trotovšek, Darja; Tomori, Martina

    1996-01-01

    In the present study, depression and anxiety were evaluated in a sample of 81 secondary school-aged adolescents, hospitalised at the Adolescent Department, Centre for Mental Health, Ljubljana. The results were compared with those obtained in a control group of 122 secondary school students. The purpose of the study was to identify risk factors for adolescent anxiety and depressive disorders. Data were collected using a clinical interview, the Beck DepressionInventory - BDT and the State and T...

  3. Hazard of radioactive releases resulted from coal burning; Opasnost` vysvobozhdeniya radioaktivnykh produktov pri szhiganii uglya

    Energy Technology Data Exchange (ETDEWEB)

    Gabbard, V

    1995-09-01

    Consideration is given to the data, pointing to the fact, that coal-burning power plants release of radioactive substances, contained in gaseous wastes, is not less, than the same one of nuclear power plants. The necessity of regulating emission of these substance in atmosphere by analogy with nuclear power industry is shown. 1 fig.

  4. Seventh national conference of the South African Section of the PRI

    International Nuclear Information System (INIS)

    1983-01-01

    This publication contains the papers delivered at the 7th national conference of the South African Section of the Plastics and Rubber Institute held on the 10th and 11th November 1983 in Johannesburg. This papers cover information on the various applications of rubber and plastic and other organic polymers. One of this papers look at studies in cross-linking PVC footwear soling compounds using gamma-irradiation

  5. Uporaba kreativnih medijev pri delu z mladimi v družbi tveganja

    OpenAIRE

    Zaner, Tamara

    2017-01-01

    Working as social pedagogues, we constantly meet young people. In a modern society, the youth face insecurity, doubts, and consequently, also distress that affects all aspects of their lives. The present paper is based upon Beck’s conceptualisation of the modern society. To understand the position of the young within the society I part from the concept of “life orientation”, developed by the social pedagogue Hans Thiersch. The present thesis has two purposes. One of them is to check how creat...

  6. Sprendimų priėmimo samprata ir tyrimų tradicijos

    OpenAIRE

    Šarkutė, Ligita

    2009-01-01

    This article aims to analyse the process of decision making which is the object of interdisciplinary research. The definition of decision making is presented and the stages, limitations and simplification strategies of decision making are also discussed. This paper also deals with the scientific disciplines which examines decision making and with research paradigms widely used in decision making analysis. These paradigms are rational decision making and naturalistic decision making. The artic...

  7. Zaznana povezanost med komponentami zavarovalne storitve pri uporabnikih dopolnilnega zdravstvenega zavarovanja

    OpenAIRE

    Šebjan, Urban

    2015-01-01

    V prispevku proučujemo odnose med komponentami storitve dopolnilno prostovoljno zdravstveno zavarovanje (DPZZ), ki jim uporabniki pripisujejo različno vlogo. Raziskovalni model s štirimi konstrukti (pomembnost kakovosti, dodatnih kritij, cenovnih popustov storitve dpzz in ugleda zavarovalnice) in indikatorjem pomembnost zavarovalne premije dpzz smo preverili z modeliranjem strukturnih enačb (SEM) na vzorcu 300 slovenskih uporabnikov storitve DPZZ. Ugotovili smo, da se pomen komponente storitv...

  8. Zaznana povezanost med komponentami zavarovalne storitve pri uporabnikih dopolnilnega zdravstvenega zavarovanja:

    OpenAIRE

    Šebjan, Urban

    2013-01-01

    V prispevku proučujemo odnose med komponentami storitve dopolnilno prostovoljno zdravstveno zavarovanje (DPZZ), ki jim uporabniki pripisujejo različno vlogo. Raziskovalni model s štirimi konstrukti (pomembnost kakovosti, dodatnih kritij, cenovnih popustov storitve dpzz in ugleda zavarovalnice) in indikatorjem pomembnost zavarovalne premije dpzz smo preverili z modeliranjem strukturnih enačb (SEM) na vzorcu 300 slovenskih uporabnikov storitve DPZZ. Ugotovili smo, da se pomen komponente storitv...

  9. Prison Inmate Information System: The Case of Yola Central Pri son ...

    African Journals Online (AJOL)

    PROF. OLIVER OSUAGWA

    inmates. There are two major types of convict ... This includes type of disposals like ..... Text. Table 1: Input Specification Guide. Detail Design. The designed system consist of different modules ... package: such as spread sheet, word processor.

  10. Effektivnost' dipiridamola pri diabeticheskoy retinopatii u bol'nykh insulinnezavisimym sakharnym diabetom

    Directory of Open Access Journals (Sweden)

    Tamara Miroslavovna Milen'kaya

    1999-06-01

    Full Text Available Актуальность. Одним из препаратов, тормозящих агрегацию тромбоцитов и препятствующих образованию тромбов в сосудах, является дипиридамол. Цель. Оценка эффективности применения дипиридамола при диабетической ретинопатии у больных ИНСД. Материалы и методы В зависимости от методов лечения пациенты бы ли разделены на 4 группы: 1-ю группу составили 17 больных, которым проводилось сочетанное лечение - лазерная аргоновая коагуляция и дипиридамол (курантил N75, во 2-ю группу вошли 15 больных, которым проводили только лазерную аргоновую коагуляцию сетчатки; 3-я группа (16 больных получала только дипиридамол; 4-я группа (контрольная - 14 больных без лечения. Результаты. В 1-й группе улучшение отмечено у 3 (21,4% больных. Во 2-й группе больных (только лазерное лечение улучшение отмечено у 2 (16,7%, у 4 (33,3% больных отмечено ухудшение процесса, что связано с увеличением по площади и высоте отека сетчатки, возможны новые кровоизлияния. В 3-й группе больных, которые получали только дипиридамол, улучшение отмечено у 2 (15,4% Выводы. У больных ИНСД с выраженными сосудистыми изменениями на глазном дне необходимо проводить лечение препаратом дипиридамол в сочетании с лазерной коагуляцией сетчатки.

  11. Vozmozhnosti sokhraneniya nizhney konechnosti pri kriticheskoy ishemii u bol'nykh sakharnym diabetom

    Directory of Open Access Journals (Sweden)

    A V Pokrovskiy

    2002-12-01

    Full Text Available Поражение магистральных артерий нижних конечностей при сахарном диабете (СД наблюдается в 3-5 раз чаще, чем при изолированном атеросклерозе. Высказывается мнение, что существует тесная генетическая связь между СД типа 2 и атеросклеротическими процессами в артериях. Течение атеросклероза при диабете гораздо агрессивнее, у больных диабетом частота встречаемости критической ишемии примерно в 5 раз выше, чем в остальной популяции; трофические нарушения развиваются у 10% пациентов с СД в пожилом возрасте. При выявлении критической ишемии пациент с диабетом оказывается перед альтернативой потери конечности в ближайшие 6 мес. ? около 40-50% ампутаций нижних конечностей по поводу периферической артериальной недостаточности выполняется у больных диабетом. Результаты исследования Basle показали, что высокие? ампутации выполняются в 11 раз чаше при СД, чем у остальных пациентов, причем ампутации требуются у более молодых людей.

  12. Seimo narių informacinė elgsena sprendimų priėmimo procese

    OpenAIRE

    Blagnienė, Renata

    2013-01-01

    Decisions of the highest authorities condition the welfare of society. Therefore, the issue of the racionalisation of their decisions is very important. The need to reveal the grounds of the decisions of lawmakers calls for investigating their information behaviour, i.e. their behaviour in the process of information seeking, its optimization and application in the process of decision-making. The lack of research of information behaviour (from the point of view of lawmakers rather than of info...

  13. Vyuziti pocitacove simulace pri navrhu klimatizace nove galerie v objektu Sovovych mlynu

    NARCIS (Netherlands)

    Lain, M.; Bartak, M.; Drkal, F.; Hensen, J.L.M.

    2001-01-01

    Simulation in engineering the ventilation and air-conditioning of a new art gallery in Sovovy mlýny. The paper attempts to outline the current state-of-the-art in the Czech Republic regarding the use of integrated building performance simulation as a design tool. This is illustrated by a recent

  14. Ninth national conference of the South African Section of the PRI

    International Nuclear Information System (INIS)

    1987-01-01

    This publication contains the papers of the ninth national conference of the South African Section of the Plastics and Rubber Institute held at Johannesburg on the 22nd and 23rd October 1987. The papers cover the different applications of polymers and two seminars particularly discuss the chemical radiation effects on polymers

  15. Vpliv osebnosti na vedenje pri igranju računalniških iger

    OpenAIRE

    Grudina, Rok

    2017-01-01

    Razvoj računalnikov je od konca 20. in na začetku 21. stoletja strmo narasel. Računalnike danes uporabljamo na vseh področjih. Mladostniki jih največkrat uporabljajo med preživljanjem prostega časa za igranje računalniških iger. Tako kot računalniki so se tudi računalniške igre skozi čas razvijale, da bi zadovoljile potrebe najbolj zahtevnih uporabnikov. Tako lahko danes vsak dobi igro po svojem okusu. Igre, ki so grafično izjemne, igre z zanimivo zgodbo in izzivi. Omogočajo vživetje v virtua...

  16. BOL I SMJERNICE ZA SUZBIJANJE BOLI PRI KRONIČNOJ RANI

    OpenAIRE

    PERSOLI-GUDELJ, MARIJANA; LONČARIĆ-KATUŠIN, MIRJANA; MIŠKOVIĆ, PETAR

    2016-01-01

    U ovom preglednom članku opisan je patomehanizam nastanka bolnog osjeta sa posebnim osvrtom na pojavu boli kod kronične rane. Prikazane su smjernice (preporuke) za njeno liječenje. U liječenju je stavljen naglasak na farmakoterapiju (analgetici). Kao temelj racionalne primjene analgetika preporuča se »trostupanjska» ljestvica SZO-e. Istaknuta je potreba kombinacije farmakoterapije s nefarmakološkim postupcima (kirurški, fi zikalni). Posebno je istaknut pozitivni učinak VIP svjetla na ubrza...

  17. Obrazovanie Vzroslykh pri Probleme Dosuga (Adult Education and the Problem of Leisure)

    Science.gov (United States)

    Darinskii, Anatolii V.

    1969-01-01

    Adult education in the Soviet Union must find flexible new methods, preferably including tourism or other elements of recreation, to raise adults' cultural standards and intellectualize their free time while helping them improve their work qualifications and professional skills. (Author/LY)

  18. Bodo znanstveniki priče vnovičnemu stvarjenju sveta?

    CERN Multimedia

    Skerl, Jure

    2007-01-01

    V podzemlju blizu Ženeve bodo prihodnje leto opravili najpomembnejši fizikalni poskus, odkar je bila na začetku prejšnjega stoletja potrjena Einsteinova relativnostna teorija - Nekateri znanstveniki so tako vznemirjeni, da ponoči ne zatisnejo več oči. (1/2 page)

  19. Prison Inmate Information System: The Case of Yola Central Pri1son ...

    African Journals Online (AJOL)

    This advancement leads to automation of system processes. ... storage of data, easy access and retrieval of information to authorized users, ... In addition, there is provision to search and view reports of both current and discharged prisoners.

  20. Razvoj mikrostrukture pri izdelavi gradientnega materiala H13-Cu s tehnologijo LENS

    OpenAIRE

    Artiček, Uroš

    2014-01-01

    Tehnologija LENS predstavlja sodobno dodajalno tehnologijo nanašanja kovinskih materialov. Prikazana je idejna zasnova uporabe visokotehnoloških materialov v orodjih za brizganje umetnih mas ter orodjih za tlačno litje lahkih kovin in njihovih zlitin, izdelanih z omenjeno tehnologijo. V praksi se pogosto zgodi, da pride med strjevanjem do odstopanj dimenzijskih in oblikovnih toleranc izdelka zaradi neenakomerne porazdelitve temperature v orodju ter posledično v izdelku med ohlajanjem. Hkrati ...

  1. Gammametry of sea bottom in prospecting for minerals. Gammametriya morskogo dna pri poiskakh poleznykh iskopaemykh

    Energy Technology Data Exchange (ETDEWEB)

    Shatsov, A N [Vsesoyuznyj Nauchno-Issledovatel' skij Inst. Yadernoj Geofiziki i Geokhimii, Moscow (USSR)

    1977-01-01

    The main aspects of study of the natural gamma field in the geological investigations of sea bottom are considered. Problems of development of sea scintillation radiometers for continuous (in profiles) and discrete, in (in stations) measurements of the natural gamma-radiation of the superficial layer of modern sea sediment and rock of sea bottom in conditions of natural occurence are discussed. The significance of gammametry of shallow-water zones, in the Caspian, Baltic, Black and Japan seas for the study of the geological structure of the sea bottom and its mineral base is shown. Geophysical methods are briefly described which must be used in combination with gammametry of the sea bottom. According to the Soviet and foreign sources the future of using spectrometry of natural and also induced and captured gamma radiation is shown for the study of ferro-manganese and phosphorus concretions, depressions in the sea bottom, filled by highly mineralized brines and silts.

  2. The role of radiotherapy in breast conserving treatment; Uloha radioterapie pri prsnik zachovavajucej liecbe

    Energy Technology Data Exchange (ETDEWEB)

    Mardiak, J.; Mego, M.; Palacka, P.; Rajec, J.; Liskova, S.; Chovanec, M. [Univerzita Komenskeho v Bratislave, Bratislava (Slovakia)

    2012-07-01

    This book offers chapters on diagnosis and treatment of breast cancer. The text is intended for physicians preparing for Clinical Oncology attestation. The attention is mostly paid to systemic treatment. The chapters dealing with the diagnosis, surgical treatment and radiotherapy are focused only on the aspects which are necessary for medical oncologist [Slovak] Kniha predklada kapitoly z diagnostiky a liecby karcinomu prsnika. Text je urceny pre lekarov pripravujucich sa na atestaciu z klinickej onkologie. Vacsia pozornost bola venovana systemovej liecbe. Kapitoly zaoberajuce sa diagnostikou, chirurgickou liecbou a radioterapiou su zamerane iba na tie aspekty uvedenych kapitol, ktore su potrebne pre pracu klinickeho onkologa.

  3. Chasing halorespirers: High throughput multiplex detection of dechlorinating bacteria using Pri-Lock probes

    Energy Technology Data Exchange (ETDEWEB)

    Maphosa, F.; Doorn, R. van; Vos, W. de; Cor Schoen, C.; Smidt, H.

    2009-07-01

    Bioremediation management strategies for sites contaminated with chlorinated compounds require monitoring technologies that enable simultaneous detection and quantification of a wide range of microorganisms involved in reductive dechlorination. Many multiplex, quantitative detection methods available suffer from compromises between the level of multiplexing, throughput and accuracy of quantification. (Author)

  4. Chalk effect on PVC cross-linking under irradiation; Vliyanie mela na sshivanie PVKh pri obluchenii

    Energy Technology Data Exchange (ETDEWEB)

    Chudinova, V V; Guzeev, V V; Mozzhukhin, V B; Pomerantseva, Eh G; Nozrina, F D; Zhil` tsov, V V; Zubov, V P

    1994-12-31

    Effect of nonmodified and modified chalk on curing degree of polymer matrix was studied under-irradiation of PVC-compositions. Films of the compositions (100 mass part 7 PVC, 0-100 mas.part of chalk, 2.5 - lead sulfate, 1.5 - lead stearate and 0.3 - glycerin) were irradiated up to absorbed dose 0.1 MGy in an inert medium. Content of gel-fraction after boiling in THF was determined with use of IR spectroscopy. It was established, that intensive dehydrochlorination and polymer curing took place on chalk particle surface. Network fixed strongly chalk particles. However, chalk inhibited processes of dehydrochlorination and PVC curing, increasing amount of noncured PVC in polymer matrix.

  5. PROSUDBA KVALITETE I KVANTITETE DOBIVENE KOSTI UPORABOM BIFAZNOG ß-TRIKALCIJFOSFATA/ HIDROKSILAPATITA PRI PODIZANJU DNA SINUSA

    OpenAIRE

    Jelušić, Damir

    2014-01-01

    Razvoj dentalne implantologije unaprijedio je različite kirurške metode regeneracije kosti, a jedna od njih jest i podizanje dna sinusa. Svrha ovoga rada bila je provedba kliničkog istraživanja u kojemu su se koristila dva različita sintetska koštana nadomjestka te analiza njihovih svojstava s obzirom na biokompatibilnost, uspješnost regeneracije kosti i utjecaj na stabilnost ugrađenih implantata. Zbog toga je obavljeno 60 zahvata podizanja dna sinusa kod 43 pacijenta podj...

  6. Legislativní problematika zpracování pryžového odpadu

    OpenAIRE

    Harant, Petr

    2011-01-01

    This diploma thesis deals with the issue of rubber waste legislative focusing on waste tyres. The aim of the thesis is a thorough analysis of current legislative including newly prepared alterations with emphasis on specific lingering problems. A project of secondary material recycling, which has been created in current legal conditions, will be introduced. The project is assessed in terms of project managment methodology and the thesis concludes by suggesting an ideal project managment appro...

  7. FLAVOUR: Friendly Location-aware conference Assistant with priVacy Observant architectURe

    NARCIS (Netherlands)

    Kavitha Muthukrishnan, K.; Meratnia, Nirvana; Lijding, M.E.M.

    Context-aware applications are emerging on the daily basis and location information proves to be one of the key components to develop context-aware applications upon. This stems from the fact that location information enables and facilitates reasoning about what users are doing (user’s behavioural

  8. Prying the Gates Wide Open: Academic Freedom and Gender Equality at Brown University, 1974-1977

    Science.gov (United States)

    Porwancher, Andrew

    2013-01-01

    In 1974, Brown University's Department of Anthropology denied tenure to assistant professor Louise Lamphere. Convinced that her dismissal was the product of sex discrimination, Lamphere filed suit against Brown. Lamphere and three other female scholars who joined her suit successfully pressed Brown into an out-of-court settlement in 1977.…

  9. Glasbena terapija pri otrocih in mladostnikih z motnjami vedenja in osebnosti

    OpenAIRE

    Pepelnak-Arnerić, Marija

    2015-01-01

    People have many definitions of music. It was used systematically since prehistoric times. Music was applied systematically in curative and preventative use. The use of music in caring for people with developmental disabilities has a long tradition too. Music can often be an effective tool for establishing inirial contact with behaviour disordered or emotionally disturbed children or adolescent. The process of developing effective music therapy treatment plans includes five major steps. Many ...

  10. Novi pristopi pri proučevanju prsti v pokrajini = New approaches in Slovenian soil geography

    Directory of Open Access Journals (Sweden)

    Blaž Repe

    2006-01-01

    Full Text Available In Slovenia, soil research of a given landscape is often neglected in physical geography studies. Despite the fact of an equivalent position of soil geography within the science system of Slovene geography. Reasons can be found in time consuming fi eld research, expensive laboratory analysis and soil data and also the lack of its own methodology. The drawbacks could be partially replaced by different approaches of research and especially to establish links with other physical elements of the environment. The use of easily accessible digital and cartographic data, basic field techniques, in combination with simple GIS tools and quantitative methods overcomes many of the financial or time constraints.

  11. P.A. Mbenzi and D.N. Iithete. English-Oshindonga Dictionary for Pri-

    African Journals Online (AJOL)

    The front matter of the dictionary consists of a preface and three paragraphs on how to use ... understanding of other subjects such as History, Science, Geography, etc." An .... mar description, assist the user in providing clues as to the existing differences ... "He uses chalk to write on the blackboard", while the accompanying.

  12. Spatial soil moisture mapping through multi-temporal analysis of ERS-SAR pri data

    OpenAIRE

    Verhoest, N.; Troch, P. A.; Deckmyn, J.; Paniconi, C.; De Troch, François

    1997-01-01

    La dispersión de microondas de suelo depende de varias características de superficie, como la rugosidad, la vegetación y el contenido de humedad de la capa superior. El conocimiento de la distribución temporal y espacial de este último parámetro es de gran importancia para hidrológico, meteorológico y climatológico de modelado. Sin embargo las mediciones precisas de la distribución espacial de la humedad del suelo con métodos clásicos siempre han sido una tarea difícil. Debido a su dependenci...

  13. DOLŽNOSTI POSAMEZNIKA PRI URESNIČEVANJU PRAVIC V ZDRAVSTVU - PACIENT V ZOBOZDRAVSTVU

    OpenAIRE

    Bajec, Milena

    2010-01-01

    Pravice in dolžnosti posameznika kot pacienta, obravnavane v medicini in v pravu, imajo skupno točko. Obe področji, tako medicina kot pravo, obravnavata in proučujeta posameznika kot celoto, kot subjekt in objekt delovanja. Po drugi strani razvoj pacientovih pravic v zadnjem času na obeh področjih znanosti počasi, a intenzivno prehaja iz obravnavanja pacienta pretežno kot objekta v subjekt delovanja v procesu izboljšanja ali povrnitve zdravja. V vnemi po priznanju in uresničevanju pacientove ...

  14. Student Scientific Conference PriF UK 2012. Proceedings of reviewed contributions

    International Nuclear Information System (INIS)

    Galambos, M.; Dzugasova, V.

    2012-01-01

    The conference included the following sections: (i) Biology (139 contributions); (ii) Chemistry (48 contributions); (iii) Geology (31 contributions); (iv) Geography (38 contributions); (v) Didactics (11 contributions); (vi) Environmental Science (25 contributions);) Contributions relevant of INIS interest have been inputted to INIS.

  15. Relative Biological Effectiveness of 14-MeV Fast Neutrons to Co{sup 60} Gamma-Rays in Einkorn Wheat; Efficacite Biologique Relative des Neutrons Rapides de 14 MeV par Rapport aux Rayons Gamma de {sup 60}Co sur l'Engrain; Otnositel'naya biologicheskaya ehffektivnost' bystrykh nejtronov s ehnergiej 14 MeV i gamma-luchej CO{sup 60} pri ikh dejstvii na pshenitsu odnozernyanku; EBR de los Neutrones Rapidos de 14 MeV y de los Rayos Gamma del {sup 60}Co en el Trigo Escanda Menor

    Energy Technology Data Exchange (ETDEWEB)

    Fujii, T. [National Institute of Genetics, Misima (Japan)

    1964-05-15

    , sobrevivio entre 60 y 80% de las plantulas y en los grupos tratados con rayos gamma, la supervivencia fue del 100%. En cambio, en el grupo sometido a la irradiacion neutronica con la dosis mas elevada, solo sobrevivio un 4% de las plantulas. No se observaron mutaciones en el grupo testigo y el numero de plantas que presentaba retonos rayados crecio al aumentar la dosis de ambos tipos de radiacion. Se observaron retoflos con mutaciones en un 15% de las plantas sobrevivientes tratadas con la dosis inferior de neutrones y la misma frecuencia se registro para la dceis mayor de rayos gamma. Al parecer, la EBR de los neutrones de 14 MeV con respecto a los rayos gamma de {sup 60}Co, para la mutacion somatica, es 20 como minimo. (author) [Russian] Avtor izuchal OBJe nejtronov s jenergiej 14 Mjev i gamma-luchej Sobo pri ih dejstvii na pshenicu odnozernjanku s pomoshh'ju special'nogo lokusnogo metoda. Dlja opyta ispol'zovalis' semena generacii F{sub 1} gibrida mezhdu ishodnym sortom i mutantom Chlorina (mutant Chlorina byl poluchen kak edinstvennyj recessivnyj rentgenomutant; ot stadii sejanca do nastuplenija spelosti on byl odnorodno svetlozelenym s otnositel'no vysokoj vyzhivaemost'ju i urozhajnost'ju). U rastenij F{sub 1} byla normal'naja zelenaja okraska i normal'nyj harakter rosta. Pokojashhiesja semena Ft obluchali bystrymi nejtronami v dozah 0,5, 1,0 i 1,4 krad i gamma-luchami v dozah 4,3 8,6 i 12,9 krad. Mutacii ot dominantnyh normal'nyh zelenyh do Chlorina nabljudalis' posle oboih vidov obluchenija i pojavljalis' v list'jah i stebljah geterozigotnyh rastenij X{sub 1} v vide prodol'nyh polos. Okolo 80% semjan vzoshlo na kontrol'nyh uchastkah i na uchastkah posle obluchenija ca- mymi nizkimi dozami nejtronov i gamma-luchej, procent vshozhesti postepenno snizhalsja s povysheniem dozy pri oboih vidah obluchenija. Krome togo, takaja zhe tendencija nabljudalas' i na rannih stadijah rosta sejancev, kotoryj postepenno tormozilsja s povysheniem dozy. Soglasno jetim dannym nejtronnoe

  16. Improved Techniques for Low-Flux Measurement of Prompt Neutron Lifetime, Conversion Ratio and Fast Spectra; Methodes Perfectionnees de Mesure de la Duree de Vie des Neutrons Instantanes, du Rapport de Conversion et des Spectres de Neutrons Rapides, dans un Reacteur a Bas Flux; Usovershenstvovannye metody izmereniya vremeni zhizni mgnovennykh nejtronov, koehffitsienta konversii i spektra bystrykh nejtronov pri slabykh potokakh nejtronov; Tecnicas Perfeccionadas para la Determinacion del Periodo de los Neutrones Inmediatos, la Razon de Conversion y los Espectros de Neutrones Rapidos, con Flujos Reducidos

    Energy Technology Data Exchange (ETDEWEB)

    Armani, R. J.; Bennett, E. F.; Brenner, M. W.; Bretscher, M. M.; Cohn, C. E.; Huber, R. J.; Kaufmann, S. G.; Redman, W. C. [Argonne National Laboratory, Argonne, IL (United States)

    1964-02-15

    medir este valor en un reactor de flujo reducido, pero se estan estudiando algunos que pueden servir a ese fin. Los autores resefian tres de las tecnicas que ofrecen mejores perspectivas. Los estudios realizados con el proposito de construit un espectrometro pequeflo para neutrones rapidos con buenas caracteristicas de estabilidad, poder de resolucion y sensibilidad, destinado a la medicion de espectros neutronicos dentro del reactor, en el intervalo energetico de las decenas o centenares de kilovoltios, se han concentrado en el empleo del analisis de la forma de los impulsos (con el fin de rechazar los sucesos iniciados por los rayos gamma en los contadores proporcionales de retroceso de hidtogeno) y el empleo de la colimacion en los detectores tipo sandwich, a base de {sup 6}LiF en un material solido, a fin de aumentar el poder de resolucion. Se ha construido cierto ndmero de instrumentes de este tipo y se esta estudiando la forma en que se comportan frente a los neutrones monocineticos y los neutrones de un reactor. Recurriendo a la tecnica de rechazo de los rayos gamma, se ha podido reducir varios cientos de veces la sensibilidad del contador de retroceso frente a dichos rayos y de esta manera, el limite inferior de aplicacion del instrumente se ha extendido por lo menos hasta los 30 keV. En cuanto a los instrumentes de semiconductors a base de {sup 6}Li, se han observado poderes de resolucion de hasta 70 keV de amplitud total en correspondencia con la mitad del maximo (1,5%) para la suma de los impulsos, en la irradiaeion con neutrones termicos. (author) [Russian] Pri osushhestvlenii programmy issledovanija reak- tora nulevoj moshhnosti (ZPR) primenjalis' razlichnye statisticheskie metody izmerenija ot- noshenija vremeni zhizni mgnovennyh nejtronov k doze zapazdyvajushhih nejtronov. Odin metod, a imenno analiz ''shuma'' reaktora s pomoshh'ju polosovogo fil'tra byl razrabotan v laboratorii, a drugie, naprimer izmerenie chastoty zapazdyvajushhih sovpadenij impul

  17. Negative pion-nucleus elastic scattering at 20 and 40 MeV

    International Nuclear Information System (INIS)

    Burleson, G.; Blanpied, G.; Cottingame, W.; Daw, G.; Park, B.; Seth, K.K.; Barlow, D.; Iversen, S.; Kaletka, M.; Nann, H.; Saha, A.; Smith, D.; Redwine, R.P.; Burger, W.; Farkhondeh, M.; Saghai, B.; Anderson, R.

    1994-01-01

    Differential cross sections for the elastic scattering of 20 and 40 MeV π - by nuclei ranging from 12 C to 208 Pb are reported. Comparisons are made with the predictions of the Michigan State University (MSU) optical potential

  18. Sensitivity of neutron scattering properties to the coupling to giant resonances

    International Nuclear Information System (INIS)

    Delaroche, J.P.; Guss, P.P.; Floyd, C.E.; Walter, R.L.; Tornow, W.

    1983-01-01

    Extended coupled channels calculations have been performed for neutron elastic and inelastic cross sections and analyzing powers for vibrational nuclei with 40 208 Pb and 12 MeV results for 40 Ca are illustrated here

  19. A rapid and reliable method for Pb isotopic analysis of peat and lichens by laser ablation-quadrupole-inductively coupled plasma-mass spectrometry for biomonitoring and sample screening

    International Nuclear Information System (INIS)

    Kylander, M.E.; Weiss, D.J.; Jeffries, T.E.; Kober, B.; Dolgopolova, A.; Garcia-Sanchez, R.; Coles, B.J.

    2007-01-01

    An analytical protocol for rapid and reliable laser ablation-quadrupole (LA-Q)- and multi-collector (MC-) inductively coupled plasma-mass spectrometry (ICP-MS) analysis of Pb isotope ratios ( 207 Pb/ 206 Pb and 208 Pb/ 206 Pb) in peats and lichens is developed. This technique is applicable to source tracing atmospheric Pb deposition in biomonitoring studies and sample screening. Reference materials and environmental samples were dry ashed and pressed into pellets for introduction by laser ablation. No binder was used to reduce contamination. LA-MC-ICP-MS internal and external precisions were 207 Pb/ 206 Pb and 208 Pb/ 206 Pb ratios. LA-Q-ICP-MS internal precisions on 207 Pb/ 206 Pb and 208 Pb/ 206 Pb ratios were lower with values for the different sample sets 208 Pb by Q-ICP-MS are identified as sources of reduced analytical performance

  20. Isotopic and velocity distributions of {sub 83}Bi produced in charge-pickup reactions of {sup 208}{sub 82}PB at 1 A GeV

    Energy Technology Data Exchange (ETDEWEB)

    Kelic, A.; Schmidt, K.H.; Enqvist, T. [Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (DE)] [and others

    2004-07-01

    Isotopically resolved cross sections and velocity distributions have been measured in charge-pickup reactions of 1 A GeV {sup 208}Pb with proton, deuterium and titanium target. The total and partial charge-pickup cross sections in the reactions {sup 208}Pb + {sup 1}H and {sup 208}Pb + {sup 2}H are measured to be the same in the limits of the error bars. A weak increase in the total charge-pickup cross section is seen in the reaction of {sup 208}Pb with the titanium target. The measured velocity distributions show different contributions - quasi-elastic scattering and {delta}-resonance excitation - to the charge-pickup production. Data on total and partial charge-pickup cross sections from these three reactions are compared with other existing data and also with model calculations based on the coupling of different intra-nuclear cascade codes and an evaporation code. (orig.)

  1. Direct photons in WA98

    CERN Document Server

    Aggarwal, M M; Ahammed, Z; Angelis, Aris L S; Antonenko, V G; Arefev, V; Astakhov, V A; Avdeichikov, V; Awes, T C; Baba, P V K S; Badyal, S K; Barlag, C; Bathe, S; Batyunya, B; Bernier, T; Bhalla, K B; Bhatia, V S; Blume, C; Bock, R; Bohne, E M; Böröcz, Z K; Bucher, D; Buijs, A; Büsching, H; Carlén, L; Chalyshev, V; Chattopadhyay, S; Cherbachev, R; Chujo, T; Claussen, A; Das, A C; Decowski, M P; Delagrange, H; Dzhordzhadze, V; Dönni, P; Dubovik, I; Dutt, S; Dutta-Majumdar, M R; El-Chenawi, K F; Eliseev, S; Enosawa, K; Foka, P Y; Fokin, S L; Ganti, M S; Garpman, S; Gavrishchuk, O P; Geurts, F J M; Ghosh, T K; Glasow, R; Gupta, S K; Guskov, B; Gustafsson, Hans Åke; Gutbrod, H H; Higuchi, R; Hrivnacova, I; Ippolitov, M S; Kalechofsky, H; Kamermans, R; Kampert, K H; Karadzhev, K; Karpio, K; Kato, S; Kees, S; Klein-Bösing, C; Knoche, S; Kolb, B W; Kosarev, I G; Kucheryaev, I; Krümpel, T; Kugler, A; Kulinich, P A; Kurata, M; Kurita, K; Kuzmin, N A; Langbein, I; Lee, Y Y; Löhner, H; Luquin, Lionel; Mahapatra, D P; Man'ko, V I; Martin, M; Martínez, G; Maksimov, A; Mgebrishvili, G; Miake, Y; Mir, M F; Mishra, G C; Miyamoto, Y; Mohanty, B; Morrison, D; Mukhopadhyay, D S; Naef, H; Nandi, B K; Nayak, S K; Nayak, T K; Neumaier, S; Nyanin, A; Nikitin, V A; Nikolaev, S; Nilsson, P O; Nishimura, S; Nomokonov, V P; Nystrand, J; Obenshain, F E; Oskarsson, A; Otterlund, I; Pachr, M; Pavlyuk, S; Peitzmann, Thomas; Petracek, V; Pinganaud, W; Plasil, F; Von Poblotzki, U; Purschke, M L; Rak, J; Raniwala, R; Raniwala, S; Ramamurthy, V S; Rao, N K; Retière, F; Reygers, K; Roland, G; Rosselet, L; Rufanov, I A; Roy, C; Rubio, J M; Sako, H; Sambyal, S S; Santo, R; Sato, S; Schlagheck, H; Schmidt, H R; Schutz, Y; Shabratova, G; Shah, T H; Sibiryak, Yu; Siemiarczuk, T; Silvermyr, D; Sinha, B C; Slavin, N V; Söderström, K; Solomey, Nickolas; Sood, G; Sørensen, S P; Stankus, P; Stefanek, G; Steinberg, P; Stenlund, E; Stüken, D; Sumbera, M; Svensson, S; Trivedi, M D; Tsvetkov, A A; Tykarski, L; Urbahn, J; Van den Pijll, E C; van Eijndhoven, N; van Nieuwenhuizen, G J; Vinogradov, A; Viyogi, Y P; Vodopyanov, A S; Vörös, S; Wyslouch, B; Yagi, K; Yokota, Y; Young, G R

    2002-01-01

    A measurement of direct photon production in /sup 208/Pb+/sup 208/Pb collisions at 158 A GeV has been carried out in the CERN WA98 experiment. The invariant yield of direct photons was extracted as a function of transverse momentum in the interval 0.51.5 GeV/c. the result constitutes the first observation of direct photons in ultrarelativistic heavy-ion collisions. (19 refs).

  2. Nuclear structure studies at intermediate energies: Interim progress report, August 1987 through August 1988

    International Nuclear Information System (INIS)

    Hintz, N.M.

    1988-08-01

    This report contains papers on nuclear structure studies. The topics of some of the papers discussed in this report are: recoil free Δ production; low lying magnetic states; Coulomb-nuclear polarimeter; comparison of Dirac and non relativistic IA; measurements of A/sub LL/ in /rvec p//rvec p/ elastic; π + 208 Pb; /sup 206,207,208/Pb density differences; search for dibaryon resonances; and effective mass corrections to p + X

  3. Nuclear symmetry energy in density dependent hadronic models

    International Nuclear Information System (INIS)

    Haddad, S.

    2008-12-01

    The density dependence of the symmetry energy and the correlation between parameters of the symmetry energy and the neutron skin thickness in the nucleus 208 Pb are investigated in relativistic Hadronic models. The dependency of the symmetry energy on density is linear around saturation density. Correlation exists between the neutron skin thickness in the nucleus 208 Pb and the value of the nuclear symmetry energy at saturation density, but not with the slope of the symmetry energy at saturation density. (author)

  4. Nuclear effects in {sup 8}B dissociation

    Energy Technology Data Exchange (ETDEWEB)

    Kido, Toshihiko [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

    1998-07-01

    The break-up reaction of the nucleus on proton drip-line is investigated. A time-dependent Schroedinger equation for the relative motion between a weakly bound proton and core nucleus is numerically solved by treating the Coulomb+nuclear fields of a target as an external field. The theory is applied to the break-up reaction {sup 8}B + {sup 208}Pb {yields} {sup 7}Be + p + {sup 208}Pb. (author)

  5. The Radioisotopic Determination of Diffusion Coefficients and Currents in Natural Waters. Surface Collection of Radioactive Fall-Out on a Large Alpine Lake; Determination par detection nucleaire des coefficients de diffusion et des courants dans les eaux naturelles. Evolution de la surface de collection d'un grand lac alpin pour les retombees radioactives; Opredelenie koehffitsienta diffuzii i skorosti techeniya estestvennykh vod pri pomoshchi yadernogo detektirovaniya. Ehvolyutsiya poverkhnosti sbora radioaktivnykh osadkov na bol'shom al'pijskom ozere; Determinacion por deteccion nuclear de los coeficientes de difusion y de las corrientes en las aguas naturales evolucion de la superficie de captacion de un gran lago alpino para las precipitaciones radiactivas

    Energy Technology Data Exchange (ETDEWEB)

    Chesselet, R.; Nordemann, D. [Service d' Electronique Physique, Centre d' Etudes Nucleaires de Saclay (France); Dussart, B. [Centre de Recherches Hydrobiologiques, CNRS, Gif-sur-Yvette (France)

    1963-08-15

    radioaktivnykh produktov v usloviyakh diffuzii i vstrechnykh potokov. Ispol'zovanie diffuzii radioaktivnykh produktov v ochen' nebol'shikh kolichestvakh i razlichnye metody obnaruzheniya pri pomoshchi yadernykh izmerenij vysokoj chuvstvitel'nosti mogut privesti v nastoyashchee vremya k nailuchshemu ponimaniyu diffuzii Tin situ'' i dvizheniyu mass prirodnykh vod. (author)

  6. The Determination of Sub-Microgram Quantities, of Amino Acids with H{sup 3}- and C{sup 1}4-Labelled 1-Fluoro-2.4 Dinitrobenzene; Determination d'acides amines en quantites inferieures au microgramme a l'aide de 1-fluoro-2,4-dinitrobenzen e marque au {sup 3}H et au {sup 14}C; Podschet submikrogrammnykh kolichestv aminokislot pri pomoshchi 2 : 4 dinitroftor'enzola, mechennogo H{sup 3} i C{sup 14}; Determinacion de cantidades de aminoacidos inferiores al microgramo por medio de 1-fluoro-2,4-dinitrobenceno marcado con {sup 3}H y {sup 14}C

    Energy Technology Data Exchange (ETDEWEB)

    Beale, D; Whitehead, J K [Middlesex Hospital Medical School, London (United Kingdom)

    1962-01-15

    satisfactoriament con los valores que suministra el analisis por derivacion empleando anhidrido acetico marcado con {sup 3}H y con {sup 14}C, y con los que se obtienen mediante cromatografia de intercambio ionico. (author) [Russian] Opisyvaetsya metod izotopnogo derivatsionnogo analiza dlya opredeleniya aminokislot pri nizkom urovne v 10{sup -5} mikro-mol' v gidrolizatakh proteina. 2:4 djnitroftorbenzola-H{sup 3} (G) byl sintezirovan iz ' brombenzola-H{sup 3}(G) i 2 : 4 dinitroftorbenzola-C{sup 14}(G), kotoryj byl poluchen iz khlorbenzola-C{sup 14}(G). Metod analiza vklyuchaet obrabotku smesi amino-kislot tritirovannym reaktivom (udel'naya aktivnost' 12.8 mikro kyuri/mikro ehkvijalent) v shchelochnoj rastvore, k kotoromu prisoedinyaetsya primes' s izvestnoj aktivnost' (6000 raspadov v minutu) proizvodnykh 2 : 4 dinitrofenila , mechennogo S14. Posle rastvoryayushchej ehkstraktsii smeshannaya reaktsiya vydelyaet iz svoego sostava proizvodnye dinitrofinila dvumya putyami khromatografii na bumage i soderzhanie H''3 i C''1''4 kazhdoj kapli opredelyaetsya szhiganiem i gazovym podschetom. Podschet H''3 daet kolichestvo, ravnoe proizvodnoj DNK iz aminokisloty, otdelennoj ot osnovnoj smesi, a schet C''1''4 ukazyvaet na velichinu poter', poluchivshikhsya vo vremya analiza. Itogi, poluchennye v rezul'tate analiza 1 mikrogramma gidrolizovannogo insulina polnost'yu soglasuyutsya s velichinami, poluchennymi v rezul'tate derivatsionnogo analiza s ispol'zovaniem uksusnogo angidrida, mechennogo H{sup 3} i C{sup 14} i s pomoshch'yu khromotografii ionnogo obmena smol. (author)

  7. Organization of engineering works in deploying a bridge crossing point made of class 20 pontoon material / Организация инженерных работ при устройстве понтонного моста класса 20 на месте перехода / Organizacija inžinjerijskih radova pri uspostavljanju mosnog mesta prelaska od pontonskog materijala klase 20

    Directory of Open Access Journals (Sweden)

    Nenad V. Kovačević

    2017-10-01

    -мостового батальона, являющегося частью Речной флотилии (объединение - бригада. Описанная в данной статье организация инженерных работ представляет собой целесообразную разработку всех процессов, задействованных в области переправы через водные преграды, в том числе распределение нагрузки на понтеров при устройстве понтонномостовых переправ, грузоподъемностью 20 тонн. Одной из насущных проблем, с которой сталкиваются военные инженеры при оформлении основной документации по устройству ПМП, является отсутствие современной литературы (существующая литература относится к 70-80-ым годам прошлого века, таким образом, разработчики вынуждены опираться исключительно на практический опыт как в оформлении проектной документации, так и в самом процессе производства работ. / Prilikom upotrebe pontonskog materijala za uspostavljanje mosnog i/ili neke druge vrste prelaska preko vodene prepreke (skelskog, desantnog, vrlo je važna organizacija izvođenja radova prilikom pripreme, u toku uspostavljanja, ali i pri dezangažovanju jedinica i pontonskog materijala za uspostavu i održavanje mesta prelaska. Za izvođenje ovih radova u Vojsci Srbije postoje specijalizovane ( namenske jedinice. To su jedinice jedne od specijalnosti u okviru roda inžinjerije , pontonirske specijalnosti, koje egzistiraju u okviru pontonirskih bataljona, odnosno u okviru Re

  8. Elastic and inelastic {alpha}-scattering cross-sections obtained with the 44 MeV fixed energy Saclay cyclotron on separated targets of {sup 24}Mg, {sup 25}Mg, {sup 26}Mg, {sup 40}Ca, {sup 46}Ti, {sup 48}Ti, {sup 50}Ti, {sup 52}Cr, {sup 54}Fe, {sup 56}Fe, {sup 58}Fe, {sup 58}Ni, {sup 60}Ni, {sup 62}Ni, {sup 64}Ni, {sup 63}Cu, {sup 65}Cu, {sup 64}Zn, {sup 112}Sn, {sup 114}Sn, {sup 116}Sn, {sup 118}Sn, {sup 120}Sn, {sup 122}Sn, {sup 124}Sn and {sup 208}Pb using the Saclay fixed-energy cyclotron; Sections efficaces differentielles elastiques et inelastiques obtenues par diffusion de particules {alpha} de 44 MeV sur des cibles de {sup 24}Mg, {sup 25}Mg, {sup 26}Mg, {sup 40}Ca, {sup 46}Ti, {sup 48}Ti, {sup 50}Ti, {sup 52}Cr, {sup 54}Fe, {sup 56}Fe, {sup 58}Fe, {sup 58}Ni, {sup 60}Ni, {sup 62}Ni, {sup 64}Ni, {sup 63}Cu, {sup 65}Cu, {sup 64}Zn, {sup 112}Sn, {sup 114}Sn, {sup 116}Sn, {sup 118}Sn, {sup 120}Sn, {sup 122}Sn, {sup 124}Sn et {sup 208}Pb au cyclotron a energie fixe de saclay

    Energy Technology Data Exchange (ETDEWEB)

    Bruge, G [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires. Departement de physique nucleaire, service de physique nucleaire a moyenne energie

    1967-01-01

    This report contains elastic and inelastic {alpha}-scattering cross-sections obtained with the 44 MeV fixed energy Saclay cyclotron on Mg, Ca, Ti, Cr, Fe, Ni, Co, Zn, Sn and Pb enriched targets. (author) [French] Ce rapport contient les tableaux des sections efficaces differentielles obtenues par diffusion elastique et inelastique des particules {alpha} de 44 MeV, fournies par le cyclotron a energie fixe de Saclay, sur des cibles d'isotopes separes de Mg, Ca, Ti, Cr, Fe, Ni, Co, Zn, Sn et Pb. (auteur)

  9. Photophysical processes of ionic crystals exitation at photosorption and photocatalysis. Fotofizicheskie protsessy vozbuzhdeniya ionnykh kristallov pri fotovozbuzhdenii i fotokatalize

    Energy Technology Data Exchange (ETDEWEB)

    Ryabchuk, V K; Burukina, G V [Leningradskij Gosudarstvennyj Univ., Leningrad (Russian Federation). Nauchno-Issledovatel' skij Fizicheskij Inst.

    1991-06-01

    Processes of photoexcitation of wide-band oxides and alkali-halide crystals (AHC) within intrinsic absorption range, of impurity absorption and surface states and photoinduced colour centers resulting in development of centers of photosorption and photocatalysis are considered. Mechanisms of effect of photosorption of O[sub 2], H[sub 2], CH[sub 4] and other molecules on photostimulated defect formation in oxides and AHC as well as atomic and ionic processes in photosorption and photocatalysis are dicussed.

  10. Izbrani kazalci obremenjenosti okolja pri študijah ranljivosti okolja = Selected environmental pollution indicators in environmental vulnerability studies

    Directory of Open Access Journals (Sweden)

    Dejan Cigale

    2002-01-01

    Full Text Available One of the components of the environmentalvulnerability studies is also the evaluation of the pollution of theenvironment. In the article, the analysis of the selected indicators of theachieved degree of the total and integral pollution is presented. In theframework of the environmental vulnerability studies on the spatial levelof landscape-ecological types for this purpose the following indicatorswere selected: population density, density of working places, trafficintensity and percentage of forests.

  11. Paleolitické osídlenie jaskyne Dzeravá skala pri Plaveckom Mikuláši

    Czech Academy of Sciences Publication Activity Database

    Kaminská, Ľ.; Kozlowski, J. K.; Svoboda, Jiří

    2005-01-01

    Roč. 53, č. 1 (2005), s. 1-26 ISSN 1335-0102 Institutional research plan: CEZ:AV0Z80010507 Keywords : west Slovakia * Middle and Upper Paleolithic, industry * Upper Pleistocene fauna Subject RIV: AC - Archeology, Anthropology, Ethnology

  12. Ecological and economic interests in design process of thermal power plant; Ekoloski i gospodarstveni izazovi pri projektiranju energetskih postrojenja

    Energy Technology Data Exchange (ETDEWEB)

    Sander, M [Elektroprojekt, Zagreb (Croatia)

    1997-12-31

    In design process of thermal power plant various ecological and economic contradictory interests are brought in focus. Requests on environmental protection written in laws, standards and international treaties are increasing investment costs and energy production costs. In a design phase there is a task to reconcile these contradictory requests. The paper presents relationship between technology and environmental protection with a focus on air pollution. Air pollution and human health is considered taking in account the role of design phase in thermal power plants project and human health problems. International laws and standards are presented with moral dilemmas concerning low investment costs and high environmental standards. (author). 6 tabs., 2 figs., 13 refs.

  13. Vloga in pomen ustvarjalnega pisanja pri pouku književnosti v osnovni šoli: doktorska disertacija:

    OpenAIRE

    Blažić, Milena

    2000-01-01

    The thesis presents the meaning and role of creative writing in teaching literature in elementary school. The first theoretical part discusses contemporary cognitive theory in which writing itself is a process as important as the text. Since the traditional conception of writing was centered on the result of the writing process – the text. The cognitive writing model is composed of three parts: 1. task environment; 2.the writers’ long term memory and 3. writing process. In addition two writin...

  14. Limited access to HIV prevention in French prisons (ANRS PRI2DE): implications for public health and drug policy

    OpenAIRE

    Michel, Laurent; Jauffret-Roustide, Marie; Blanche, Jerôme; Maguet, Olivier; Calderon, Christine; Cohen, Julien; Carrieri, Patrizia M

    2011-01-01

    Abstract Background Overpopulation, poor hygiene and disease prevention conditions in prisons are major structural determinants of increased infectious risk within prison settings but evidence-based national and WHO guidelines provide clear indications on how to reduce this risk. We sought to estimate the level of infectious risk by measuring how French prisons adhere to national and WHO guidelines. Methods A nationwide survey targeting the heads of medical (all French prisons) and psychiatri...

  15. Úloha cyklín-dependentnej kinázy 1 pri meiotickom dozrievaní oocytov

    Czech Academy of Sciences Publication Activity Database

    Ferencová, Ivana; Šolc, Petr

    2015-01-01

    Roč. 25, č. 3 (2015), s. 65-67 ISSN 1210-1737 R&D Projects: GA MŠk ED2.1.00/03.0124 Institutional support: RVO:67985904 Keywords : cyclin dependent kinase 1 * meiosis resumption * CDC25 phosphatase Subject RIV: EB - Genetics ; Molecular Biology

  16. Systems of amonium polyborates - monoammonium phosphate -water at 25 deg C. Sistemy poliboraty ammoniya - monoammonijfosfat - voda pri 25 grad S

    Energy Technology Data Exchange (ETDEWEB)

    Skvortsov, V G; Sadetdinov, Sh V; Polenov, A D; Mikhajlov, V I [Chuvashskij Gosudarstvennyj Pedagogicheskij Inst., Cheboksary (Russian Federation)

    1992-11-01

    It is established by solubility and refractometry methods at 25 deg C that systems of ammonium tetraborate (pentaborate) monoammonium phosphate-water refer to sumple eutonic type. The ammonium borates and monoammoniumphosphate exert salting effect over each other. It is found that phosphate borate compositions on the basis of ammonium salts are characterized by lower inhibitor properties as compared to sodium salts.

  17. Uvođenje programa osiguranja kvalitete pri mamografskom pregledu u Kliničkoj bolnici Osijek: prvi rezultati

    OpenAIRE

    Faj, Dario; Ivković, Ana; Štimac, Damir; Posedel, Dario; Kotromanović, Zdenka; Ivezić, Zdravko; Belaj, Nenad; Tomaš, Ilijan; Kubelka, Dragan

    2009-01-01

    Mamografija je najvažnija dijagnostička metoda za rano otkrivanje tumora dojke. Cilj je radiologa imati najbolju moguću dijagnostičku informaciju uz prihvatljivu dozu zračenja za bolesnika. Kakvoća slike i doza zračenja ovisi o velikom broju čimbenika kao što su brzina i kontrast filma, razvijanje filma, napon i automatski nadzor ekspozicije mamografskoga uređaja, te veličina i gustoća dojke. Uz to, uvjeti gledanja slike mogu značajno utjecati na točnost mamografske informacije. S obzirom na ...

  18. Limited access to HIV prevention in French prisons (ANRS PRI2DE: implications for public health and drug policy

    Directory of Open Access Journals (Sweden)

    Blanche Jerôme

    2011-05-01

    Full Text Available Abstract Background Overpopulation, poor hygiene and disease prevention conditions in prisons are major structural determinants of increased infectious risk within prison settings but evidence-based national and WHO guidelines provide clear indications on how to reduce this risk. We sought to estimate the level of infectious risk by measuring how French prisons adhere to national and WHO guidelines. Methods A nationwide survey targeting the heads of medical (all French prisons and psychiatric (26 French prisons units was conducted using a postal questionnaire and a phone interview mainly focusing on access to prevention interventions, i.e. bleach, opioid substitution treatment (OST, HBV vaccination and post-exposure prophylaxis (PEP for French prisoners. Two scores were built reflecting adherence to national and WHO international guidelines, ranging from 0 (no adherence to 10 (maximum adherence and 0 to 9 respectively. Results A majority (N = 113 (66% of the 171 prisons answered the questionnaires, representing 74% coverage (46,786 prisoners of the French prison population: 108 were medical units and 12 were psychiatric units. Inmate access to prevention was poor. The median[IQR] score measuring adherence to national guidelines was quite low (4.5[2.5; 5.5] but adherence to WHO guidelines was even lower 2.5[1.5; 3.5]; PEP was absent despite reported risky practices. Unsuitable OST delivery practices were frequently observed. Conclusions A wide gap exists between HIV prevention policies and their application in prisons. Similar assessments in other countries may be needed to guide a global policy reform in prison settings. Adequate funding together with innovative interventions able to remove structural and ideological barriers to HIV prevention are now needed to motivate those in charge of prison health, to improve their working environment and to relieve French prisoners from their currently debilitating conditions.

  19. Accident analysis of RB reactor dependent on the lattice pitch; Akcidentalna analiza reaktora ''RB'' pri promeni koraka resetke

    Energy Technology Data Exchange (ETDEWEB)

    Lolic, B; Lazarevic, B [Boris Kidric Institute of nuclear sciences, Vinca, Belgrade (Yugoslavia)

    1963-07-01

    This analysis was concerned with reactor core with 52-56 fuel rods, lattice pitch being, 8, 10, 12, 16, 18, and 20 cm. Measured values of excess reactivity above critical level of 3.85 cm, total anti reactivity of regulating rod, reactivity changes caused by pumping heavy water and reactivity variations due to movement of control rod were used. Three types of accidents were analyzed: movement of regulating rod to the position of zero reactivity worths, increase of heavy water level at rate of 2.5 cm/min, combination of two previous accidents.

  20. Report on operation of nuclear facilities in 1991; Porocilo o jedrski varnosti pri obratovanju jedrskih objektov v letu 1991

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1992-06-15

    The Slovenian Nuclear Safety Administration (SNSA) prepared a report on nuclear safety in the republic of Slovenia in 1991 as part of its regular practice of reporting on its work to the Government and the National Assembly of the Republic of Slovenia. The report is divided into three thematic chapters covering the activities of the SNSA, the operation of nuclear facilities in Slovenia, the activity of international missions in Slovenia and the operation of nuclear facilities around the world.

  1. A Multimethod Assessment of Juvenile Psychopathy: Comparing the Predictive Utility of the PCL:YV, YPI, and NEO PRI

    Science.gov (United States)

    Cauffman, Elizabeth; Kimonis, Eva R.; Dmitrieva, Julia; Monahan, Kathryn C.

    2009-01-01

    The current study compares 3 distinct approaches for measuring juvenile psychopathy and their utility for predicting short- and long-term recidivism among a sample of 1,170 serious male juvenile offenders. The assessment approaches compared a clinical interview method (the Psychopathy Checklist: Youth Version [PCL:YV]; Forth, Kosson, & Hare,…

  2. Viga on öelda, et me ei vaja PRi / Roger Hayes, Alasdair Sutherland ; interv. Tiiu Värbu

    Index Scriptorium Estoniae

    Hayes, Roger

    2001-01-01

    Eesti Suhtekorraldajate Liidu 5. aastapäeva seminaril osalevad Rahvusvahelise Kommunikatsiooni Instituudi direktor R. Hayes ja maailma ühe juhtiva suhtekorraldusfirma Manning, Selvage & Lee asepresident A. Sutherland

  3. Vyriausybės sprendimų priėmimo proceso analizė: Lietuvos atvejis

    OpenAIRE

    Marcinkevičius, Gediminas

    2018-01-01

    The relevance of the research. Decision making is the daily routine of politicians and the public sector institutions. The government is one of the main political institutions that takes important decisions at the state level. Nowadays, the decision-making process is becoming more complex and more difficult to manage. The decision-making process is influenced by the rapid development of information technology and the challenges posed by globalization. In such circumstances, a situation arises...

  4. PRI-CAT: a web-tool for the analysis, storage and visualization of plant ChIP-seq experiments.

    NARCIS (Netherlands)

    Muino, J.M.; Hoogstraat, M.; Ham, van R.C.H.J.; Dijk, van A.D.J.

    2011-01-01

    Although several tools for the analysis of ChIP-seq data have been published recently, there is a growing demand, in particular in the plant research community, for computational resources with which such data can be processed, analyzed, stored, visualized and integrated within a single,

  5. PROJECTION OF PENETRATION OF THE BROKER IN HOME BRAZILIAN CAPITAL MARKET THROUGH LINEAR, GOMPERTZ AND FISHER – PRY MODELS

    Directory of Open Access Journals (Sweden)

    Carlos Kawamoto

    2010-09-01

    Full Text Available This paper aims to discuss the theories of internationalization and competitiveness, the positioning of a Brazilian company from agribusiness industry, exporting meat and food that has become a major global player in this industry JBS - Friboi. This company has been internationalized very fast in recent years and become a global leader in beef production, the second to the production of chicken meat and third largest producer of pork in the U.S. (JBS, 2010. The case is emblematic of JBS when analyzed under the concept of Porter's diamond applied to Brazil. This company gained scale and competitiveness with the access to natural resources of prodution (condition factor, but now it is necessary for maintenance its leading position, it requires a strategy grounded in innovation beyond just scale and operational excellence.

  6. Time-resolved fluoroimmunoassay of phytoviruses by monoclonal antibodies. Vremenno-razreshennyj fluoroimmunoanaliz fitovirusos pri pomoshchi monoklonal'nykh antitel

    Energy Technology Data Exchange (ETDEWEB)

    Saarma, M Yu; Yarvekyul' g, L V; Andreeva, E G; Siniyarv, R K

    1989-01-01

    Monoclonal antibodies (MAbs) to potato viruses were labelled with lanthanides and used for time-resolved fluoroimmunoassay (TRFIA) of these viruses. TRFIA of potato leafroll virus (PLRV) had the sensitivity less than 1 ng/ml and was therefore approx 10 times more sensitive than ELISA. Possibility of simultaneous quantitative detection of several viruses by different MAbs labelled with europium, samarium and terbium provides TRFIA of fundamental advantage. Data on simultaneous sensitive detection of two viruses - PLRV and PVX (0,5 ng/ml of both) and three viruses - PLRV, PVX and PVM are given.

  7. Dinamika klyuchevykh mediatorov insulinorezistentnosti u bol'nykh sakharnym diabetom 2 tipa pri primenenii metformina (Formin Pliva?

    Directory of Open Access Journals (Sweden)

    Mikhail Ivanovich Balabolkin

    2004-12-01

    Full Text Available Цель. Изучение влияния формина (метформина не только на состояние углеводного, но и липидного обмена, динамику содержания лептина, его растворимого рецептора и альфа-фактора некроза опухолей (альфа-ФНО в сыворотке крови у больных СД 2. Материалы и методы. Обследовано 262 больных. Общий анализ крови и мочи проводили через каждый месяц наблюдения, а биохимический анализ крови, включая содержание общего ХС, ТГ, ХС ЛПНП и ЛПОНП и ХС ЛПВП, мочевины, креатинина, печеночных ферментов, проводили на 1-м и 4-м визитах. Лечение формином проводилось в течение не менее 12 нед. и изучалось при этом его влияние на состояние углеводного и липидного обмена у больных СД 2. Из общего числа обследованных у 26 больных на фоне терапии формином изучалось содержание лептина, растворимого рецептора к лептину и альфа-ФНО. Результаты. На фоне лечения формином у больных отмечалось улучшение углеводного обмена, которое сопровождалось статистически достоверным снижением гликемии натощак. Компенсация углеводного обмена у больных также сопровождалась статистически достоверным уменьшением индекса мас? сы тела с 34,02+0,33 кг/м2 до 32,73+0,33 кг/м2. У больных на фоне лечения формином наблюдается недостоверное снижение содержания лептина, растворимого рецептора к лептину и статистически достоверное снижение альфа-ФНО в сыворотке крови. Выводы. проведенные исследования показывают, что формин обладает выраженным антигипергликемическим эффектом, способствует улучшению компенсации углеводного обмена, что сопровождается статистически достоверным снижением гликемии и уровня гликозилированного гемоглобина в сыворотке крови. Наряду с этим на фоне терапии формином отмечается снижение уровня холестерина ЛПНП и повышение содержания холестерина ЛПВП, при практически неизмененных показателях содержания общего холестерина в сыворотке крови. Кроме того, лечение формином способствует статистически достоверному снижению содержания альфа-ФНО и умеренному понижению уровня лептина и его растворимого рецептора в сыворотке крови.

  8. Cavourography in children with large and giant omphalocele; Kavaurografiya u detej pri bol'shikh i gigantskikh omfalotsele

    Energy Technology Data Exchange (ETDEWEB)

    Mazur, V G [Sannkt-Peterburgskaya Pediatricheskaya Meditsinskaya Akademiya, Kafedra Luchevoj Diagnostiki i Luchevoj Terapii, S.-Peterburg (Russian Federation)

    1995-12-01

    The paper presents the results of using a cavourographic procedure in 37 children with large and giant omphalocele prior to the radical operation displacement of organs from hernial protrusion into the abdominal cavity. High percentages (54 and 96 %) of changes in the vena cava und urinary tract, respectively, make the author recommend this procedure for all children with this congenital anomaly. The findings help surgeons choose treatment policy and avoid undesirable complications.

  9. Analitična primerjava filmskih žanrov pri spremembi stilističnih elementov medija

    OpenAIRE

    Kompare, Rok

    2017-01-01

    Filmi dandanes predstavljajo velik del zabavne industrije. Ker so ljudje različni, so jim posledično všeč različni filmi, različne filmske zvrsti oziroma filmski žanri. Le te se nanašajo na strukturo stilističnih in narativnih elementov, ki gradijo filmsko formo medija. Kot primeri so: drama, akcija, grozljivka, komedija, znanstvena fantastika itd. Problem, s katerim se srečujejo režiserji je, kako in na kakšen način uprizoriti posamezno zgodbo, s katero tehniko pristopiti, kakšne barve upora...

  10. Ayer, Hoy y Mañana, La Teoría del Prión.

    Directory of Open Access Journals (Sweden)

    Gabriel Toro González

    2004-03-01

    Full Text Available

    (Reproducido con autorización de Acta Neurológica Colombiana Vol. 18 No. 4, 2002.

    Introducción

    La creencia mejor respaldada actualmente nos indica que existe un grupo de enfermedades causadas por anormalidades en el procesamiento de las proteínas. En la década 1950-1960 D. Carleton Gajdusek y Vincent Zigas comenzaron a estudiar en Nueva Guinea una enfermedad fatal del sistema nervioso que se conoce con el nombre de Kuru que estaba diezmando a la tribu Fore, comunidad de unos 12.000 nativos (Figura 1. Gajdusek y Zigas observaron que el Kuru no correspondía a ningún modelo genético conocido y con la colaboración del antropólogo R. Glasse pensaron que el canibalismo ritual practicado por los Fore podría ser la causa de la transmisión de esta enfermedad, lo cual resultó cierto porque el Kuru prácticamente desapareció tras tres décadas de abolidos estos hábitos.

    Desde el primer momento se notó que el Kuru tenía características comunes con el Scrapie y que había semejanza entre estas dos entidades y la enfermedad de Creutzfeldt-Jakob (ECJ, una demencia de progresión rápida, no limitada geográficamente, descrita a principios del siglo XX, las tres aparentemente causadas por infecciones virales lentas con largos períodos de incubación medibles en años y un avance irreversible de los síntomas.

    Este pensamiento, por supuesto, se apoyaba en la afirmación formulada en 1939 por Mc Farlane Burnet de un posible mecanismo de acción lenta o temperada, inicialmente ejemplificada en los virus Herpes y en la propuesta que unos 15 años más tarde hiciera el veterinario islandés B. Sigurdsson de llamar Enfermedades Virales Lentas a las entidades que exhibieran tal comportamiento. Philip Duffy y colaboradores en la Universidad de Columbia, en 1974 comunican la primera observación de transmisión de la demencia de Creutzfeldt –Jakob de humano a humano a través de un injerto de córnea y a esta se sumaron otras posibilidades de transmitir el agente causal, entre ellas electrodos contaminados, hormona de crecimiento, transplante de duramadre. Pese a esta demostración de transmisibilidad la teoría viral desde el comienzo encontró fuerte oposición; lo cual no impidió que la comunidad científica comprendiera el alcance de esta ejemplarizante investigación y concediera por ella a DC Gajdusek el Premio Nobel de Medicina en 1976.

    El punto de partida de este monumental trabajo fue entregado a la comunidad científica desde 1981 en el libro cuya carátula vemos en la Figura 2. En 1970 J.S. Griffith y R. Latarget plantean que estos agentes infecciosos carentes de ácidos nucléicos en vez de estructura viral podrían tener naturaleza esencialmente protéica..

  11. Kinetics of the U-1% Mo alloy transformation during continual cooling; Kinetika transformacije legura U-1% Mo pri kontinuiranom hladjenju

    Energy Technology Data Exchange (ETDEWEB)

    Mihajlovic, A; Djuric, B; Tepavac, P [Institute of Nuclear Sciences Boris Kidric, Vinca, Beograd (Yugoslavia)

    1965-11-15

    Study of continuous cooling of the U-1% Mo alloy is significant if it could be used as fuel in the nuclear reactor. Previous studies were dealing with relatively low cooling rate up to 3 deg C/s{sup 1}, which produced alpha + gamma structure. This task was devoted to testing the U-1% Mo alloy properties at higher cooling rates in order to discover whether bainite reaction and favourable alpha grain could be achieved under certain conditions.

  12. The Effect of Service Quality on Patient loyalty: a Study of Pri-vate Hospitals in Tehran, Iran

    OpenAIRE

    E Zarei; A Rahimi Forushani; A Rashidian; SM Ghazi Tabatabaei; M Arab

    2012-01-01

    Background: Service quality is perceived as an important factor for developing patient's loyalty. The aim of this study was to determine the hospital service quality from the patients' viewpoints and the relative importance of quality dimensions in predicting the patient's loyalty. Methods: A cross-sectional study was conducted in 2010.The study sample was composed of 943 patients selected from eight private general hospitals in Tehran. The survey instrument was a questionnaire included 24 it...

  13. Reliability of the seismic characteristics in the nuclear power plant location; Pouzdanost seizmickih karakteristika pri lociranju nuklearne elektrane

    Energy Technology Data Exchange (ETDEWEB)

    Marsicanin, B [Institut za Nuklearne Nauke Boris Kidric, Belgrade (Yugoslavia)

    1982-07-01

    Seismic characteristics for a nuclear power plant location are partly obtained from the analysis of past earthquakes. Data from older history concern damages, the newer data are in the form of seismic records. These two sources are often had to correlate, and the data dissipation is very large. Therefore these, rather unreliable data are not a convenient base for the precise anti-seismic analysis. A redistribution of efforts in order to get more reliable basic data seems necessary. (author)

  14. AVTIZEM Z DODATNO MOTNJO V DUŠEVNEM RAZVOJU PRI MLADOSTNIKIH V ZUDV DR. MARIJANA BORŠTNERJA DORNAVA

    OpenAIRE

    Gomilšak, Marjeta

    2009-01-01

    Otroški avtizem danes strokovnjaki pojmujejo kot razvojno nevrološko motnjo, ki se kaže v verbalni in neverbalni komunikaciji, tipičnih vedenjskih motnjah ter nenormalni čustveni in socialni odzivnosti. Strokovnjaki lahko postavijo diagnozo glede na tipične psihične znake najkasneje v tretjem letu otrokove starosti. Tipičnih znakov pa je kar nekaj deset in se lahko med seboj različno kombinirajo. V času otrokovega razvoja nekateri izzvenijo, lahko se pojavijo novi ali drugačni. Na splošno še ...

  15. 7 CFR 14.6 - Criteria for determining the pri- mary purpose of payments with respect to potential exclusion...

    Science.gov (United States)

    2010-01-01

    ... conservation includes actions that, for a given level of water supply, reduce the demand for or use of water by... reuse of water, thereby making existing supplies available for other current or future uses; or (iv) Improving land management practices for the purpose of reducing water use, loss, waste, increasing the...

  16. Disfunktsiya endoteliya i narusheniya trombotsitarno-koagulyatsionnogo gemostaza v razvitii diabeticheskoy nefropatii pri sakharnom diabete 2 tipa

    Directory of Open Access Journals (Sweden)

    V I Sizikov

    2007-03-01

    Full Text Available Цель. Изучить функциональное состояние эндотелия и коагуляционно-тромбоцитарного гемостаза у больных с впервые выявленным СД 2 типа. Материалы и методы. Для исследования было сформировано 3 группы пациентов (сопоставимых по возрасту, полу, степени ожирения и АГ: 1 больные с впервые выявленным СД 2 типа с ДН на стадии МАУ (33 человека, 2 с впервые выявленным СД 2 типа без ДН (28 человек, 3 группа контроля ? лица без нарушения углеводного обмена (34 человека с ожирением и АГ I-II степени. Определялся гликированный гемоглобин, МАУ. Производилась оценка тромбоцитарного звена гемостаза. Определяли число тромбоцитов и уровень фибриногена; фактор Виллебранда (ФВ, протромбиновое отношение (ПО и время рекальцификации. Функцию эндотелия оценивали на плечевой артерии (ПА. Результаты. У больных СД 2 и ДН на стадии МАУ дисфункция эндотелия оказалась более выраженной. Концентрация HbA1c в группе с ДН была на 0,6% выше, чем в группе с СД 2 без МАУ. Выделение белка с мочой у пациентов с ДН была на 90,9% (в 11 раз выше, чем у больных с СД без ДН У больных СД выявлена отрицательная корреляция между уровнем метаболитов NO в плазме и МАУ. Выводы. У больных с впервые выявленным СД 2 ответ ПА на РГ при наличии ДН на стадии МАУ меньше, чем у больных без ДН. СД 2 характеризуется изменениями тромбоцитарно-коагуляционного гемостаза, что проявляется повышением количества тромбоцитов с увеличением их спонтанной агрегации. Тромбоцитарно-коагуляционные измененияя наиболее выражены у больных СД 2 с ДН на стадии МАУ. Уровень метаболитов NO у больных с ожирением и АГ без СД 2 типа выше, чем при СД 2. Это может указывать на снижение выработки эндотелием NO при хронической гипергликемии.

  17. Increasing the effectiveness of purification of wash water discharge during placer mining. Povyshenie effekitivnosti ochistki promstokov pri razrabotke rossypei

    Energy Technology Data Exchange (ETDEWEB)

    Volkova, V M; Matveev, A A

    1981-01-01

    In the book research results are generalized for processes of water supply and purification of wash water discharges from dredge mining of placer deposits. Aspects of the geological and mineralogical structure of the solid phase of dredge waste waters and regularities in its influence on the sedimentation capacity of the suspended matter are examined. On the basis of a study of distinctive features in the hydrodynamic processes occurring in dredge sludge-settling tanks, a method is proposed for calculation of the settling tank parameters, allowing their areas of application for wash water discharge clarification to be determined reliably. Results are reported for a study of methods of intensification of the deposition of suspended clay particles in dredge waste waters, (methods) based on the use of both a series of coagulants and flocculants producible by industry and various production wastes. Aspects of the theory and practice of organizing circulating water supply for dredges are examined. The influence of wash water discharges forming during placer mining on the environment is assessed.

  18. Využitie informačných technológií pri strategickom rozhodovaní

    OpenAIRE

    Zagorsek, Branislav

    2011-01-01

    New ways of strategic approach are available due to information technologies. New dimensions in business experiments are possible. Company can now meet its research needs much more efficient. It takes less money and less time to come to similar results with business experiments as with traditional market research methods. The strategy can be more precise because of the large amount of real time data. Profit can be significantly enlarged if the product price is set on the upper section of pric...

  19. The adsorption capacity of an ocher decreases arsenic intake in maize; Adsorpcna kapacita okru znizuje prijem arzenu pri kukurici

    Energy Technology Data Exchange (ETDEWEB)

    Drlickova, G; Vaculik, M; Lux, A [Univerzita Komenskeho v Bratislave, Prirodovedecka fakulta, Katedra fyziologie rastlin, 84215 Bratislava (Slovakia)

    2012-04-25

    The aim of the experiment was to compare the growth of maize (Zea mays L.), hybrid Valentine, in two types of contaminated soil substrate (ocher and stacks) with different concentrations of arsenic (As) derived from an old mining site in Pernek in the Small Carpathians. Plants were grown in a greenhouse for 15 weeks. We found that although the total concentration of As in stacks was 2.6 times lower than in ocher (90.05 mg kg{sup -1} in stacks and 236.8 mg kg{sup -1} in ocher) the plants grown in stacks accumulated in their tissues more As compared to the plants growing in ocher. Moreover, plants in stacks were significantly smaller, they produced less biomass and bloomed later. This paradox can be explained by reduced mobility of As in ocher substrates characteristic by high content of hydro-oxides of Fe. These compounds are in fact capable of binding arsenates, what leads to decrease of their concentration in the soil solution, and thus the availability for the plants. (authors)

  20. Effect of γ-ray emission on transuranium element production cross sections in heavy ion reactions

    International Nuclear Information System (INIS)

    Il'inov, A.S.; Oganesyan, Yu.Ts.; Cherepanov, E.A.

    1980-01-01

    The effect of competition of the γ ray emission with neutron evaporation and of compound nuclei fission induced by heavy ion reactions on the production cross sections for transuranium elements is considered. It is shown that taking account of γ ray emission leads to the broadening of the excitation functions of the (HI, xny) reactions such as 18 O+ 238 U, 40 Ar+ 206 Pb, 40 Ar+ 207 Pb and 40 Ar+ 208 Pb reactions and to the displacement of their maximum toward the higher energies as well as to an increase of the absolute cross sections which is especially strong close to the fusion barrier. Cross sections for the radiative capture of heavy ions by a heavy target nucleus in 40 Ar+ 206 Pb, 40 Ar+ 208 Pb, 48 Ca+ 204 Pb and 48 Ca+ 208 Pb reactions are estimated