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Sample records for 23na izmenenie formy

  1. Low-spin states of 23Na

    A study of 23Na via the 22Ne(p,γ)23Na and 23Na(γ,γ)23Na reactions is presented. Only a limited number of resonances has been studied, selected on the basis of strong excitation of the lowest levels of which the spin was unknown. As a result the spins are now known of all levels of 23Na with excitation energies up to 7 MeV, except for a few high-spin states which are too weakly excited in the decay of the known 22Ne(p,γ) resonances. The mean lifetimes of the 23Na levels at 4.43 and 7.89 MeV were found to be 350±70 and 220±17 attoseconds (1 attosecond = 10-18 seconds) respectively. 97 refs.; 22 figs.; 12 tabs

  2. Functional MRI 2.0. 23Na and CEST imaging

    In recent years the purely morphological magnetic resonance imaging (MRI) has been increasingly flanked by so-called functional imaging methods, such as diffusion-weighted imaging (DWI), to obtain additional information about tissue or pathological processes. This review article presents two MR techniques that can detect physiological processes in the human body. In contrast to all other functional MR imaging techniques, which are based on hydrogen protons, the first technique presented (X-nuclei imaging) uses the spin of other nuclei for imaging and consequently allows a completely different insight into the human body. In this article X-nuclei imaging is focused on sodium (23Na) MRI because it currently represents the main focus of research in this field due to the favorable MR properties of sodium. The second MR technique presented is the relatively novel chemical exchange saturation transfer (CEST) imaging that can detect exchange processes between protons in metabolites and protons in free water. The first part of this article introduces the basic technical principles, problems, advantages and disadvantages of these two MR techniques, whereas the second part highlights the potential clinical applications. Examples illustrate several potential applications in neuroimaging (e. g. stroke and tumors), musculoskeletal imaging (e. g. osteoarthritis and degenerative processes) and abdominal imaging (e. g. kidneys and hypertension). Both techniques inherently contain an incredible potential for future imaging but are still on the threshold of clinical use and are currently under evaluation in many university centers. (orig.)

  3. NMR study of 23Na shielding tensor in sodium bromate single crystal

    NMR-investigations of sodium bromate showed that the electronic shielding of the 23Na nucleus is anisotropic. The effect is qualitatively explained by the deformation of electronic shells of the Na+ ion

  4. Imaging of tumor viability in lung cancer. Initial results using 23Na-MRI

    23Na-MRI has been proposed as a potential imaging biomarker for the assessment of tumor viability and the evaluation of therapy response but has not yet been evaluated in patients with lung cancer. We aimed to assess the feasibility of 23Na-MRI in patients with lung cancer. Three patients with stage IV adenocarcinoma of the lung were examined on a clinical 3 Tesla MRI system (Magnetom TimTrio, Siemens Healthcare, Erlangen, Germany). Feasibility of 23Na-MRI images was proven by comparison and fusion of 23Na-MRI with 1H-MR, CT and FDG-PET-CT images. 23Na signal intensities (SI) of tumor and cerebrospinal fluid (CSF) of the spinal canal were measured and the SI ratio in tumor and CSF was calculated. One chemonaive patient was examined before and after the initiation of combination therapy (Carboplatin, Gemcitabin, Cetuximab). All 23Na-MRI examinations were successfully completed and were of diagnostic quality. Fusion of 23Na-MRI images with 1H-MRI, CT and FDG-PET-CT was feasible in all patients and showed differences in solid and necrotic tumor areas. The mean tumor SI and the tumor/CSF SI ratio were 13.3 ± 1.8 x 103 and 0.83 ± 0.14, respectively. In necrotic tumors, as suggested by central non-FDG-avid areas, the mean tumor SI and the tumor/CSF ratio were 19.4 x 103 and 1.10, respectively. 23Na-MRI is feasible in patients with lung cancer and could provide valuable functional molecular information regarding tumor viability, and potentially treatment response. (orig.)

  5. Imaging of tumor viability in lung cancer. Initial results using {sup 23}Na-MRI

    Henzler, T.; Apfaltrer, P.; Haneder, S.; Schoenberg, S.O.; Fink, C. [University Medical Center Mannheim Heidelberg Univ., Mannheim (Germany). Inst. of Clinical Radiology and Nuclear Medicine; Konstandin, S.; Schad, L. [University Medical Center Mannheim Heidelberg Univ., Mannheim (Germany). Computer Assisted Clinical Medicine; Schmid-Bindert, G.; Manegold, C. [University Medical Center Mannheim Heidelberg Univ., Mannheim (Germany). Interdisciplinary Thoracic Oncology; Wenz, F. [University Medical Center Mannheim Heidelberg Univ., Mannheim (Germany). Dept. of Radiation Oncology

    2012-04-15

    {sup 23}Na-MRI has been proposed as a potential imaging biomarker for the assessment of tumor viability and the evaluation of therapy response but has not yet been evaluated in patients with lung cancer. We aimed to assess the feasibility of {sup 23}Na-MRI in patients with lung cancer. Three patients with stage IV adenocarcinoma of the lung were examined on a clinical 3 Tesla MRI system (Magnetom TimTrio, Siemens Healthcare, Erlangen, Germany). Feasibility of {sup 23}Na-MRI images was proven by comparison and fusion of {sup 23}Na-MRI with {sup 1}H-MR, CT and FDG-PET-CT images. {sup 23}Na signal intensities (SI) of tumor and cerebrospinal fluid (CSF) of the spinal canal were measured and the SI ratio in tumor and CSF was calculated. One chemonaive patient was examined before and after the initiation of combination therapy (Carboplatin, Gemcitabin, Cetuximab). All {sup 23}Na-MRI examinations were successfully completed and were of diagnostic quality. Fusion of {sup 23}Na-MRI images with {sup 1}H-MRI, CT and FDG-PET-CT was feasible in all patients and showed differences in solid and necrotic tumor areas. The mean tumor SI and the tumor/CSF SI ratio were 13.3 {+-} 1.8 x 103 and 0.83 {+-} 0.14, respectively. In necrotic tumors, as suggested by central non-FDG-avid areas, the mean tumor SI and the tumor/CSF ratio were 19.4 x 103 and 1.10, respectively. {sup 23}Na-MRI is feasible in patients with lung cancer and could provide valuable functional molecular information regarding tumor viability, and potentially treatment response. (orig.)

  6. Skin sodium measured with (23) Na MRI at 7.0 T

    Linz, P.; Santoro, D.; Renz, W.; J. Rieger; Ruehle, A.; Ruff, J; Deimling, M.; Rakova, N.; Muller, D.N.; Luft, F. C.; Titze, J.; Niendorf, T

    2015-01-01

    Skin sodium (Na+ ) storage, as a physiologically important regulatory mechanism for blood pressure, volume regulation and, indeed, survival, has recently been rediscovered. This has prompted the development of MRI methods to assess Na+ storage in humans (23 Na MRI) at 3.0 T. This work examines the feasibility of high in-plane spatial resolution 23 Na MRI in skin at 7.0 T. A two-channel transceiver radiofrequency (RF) coil array tailored for skin MRI at 7.0 T (f = 78.5 MHz) is proposed. Specif...

  7. Elastic Scattering between Ultracold 23Na and 85Rb Atoms in the Triplet State

    HU Qiu-Bo; ZHANG Yong-Sheng; SUN Jin-Feng; YU Ke

    2011-01-01

    @@ The elastic scattering Properties between ultracold 23Na and 85Rd atoms for the triplet state(a3∑u+ )are researched.The s-wave scattering lengts of 23Na and 85Rb are calculate by the Numerov ana semtc asstc method with two kinds of interatomic potentials, which are the interpolation potential and Lennard-Jones potential(LJ12,6)by the same phase 4φ Shape resonances appear clearly in the l= 5 partial waves for the a- Lu state.Moreover, the s-wave scattering cross section, total cross section and energy positions of shape resonances are also discussed.%The elastic scattering properties between ultracold 23Na and 85 Rb atoms for the triplet state (a3Σu+ ) are researched. The s-wave scattering lengths of 23Na and 85Rb are calculated by the Numerov and semiclassical method with two kinds of interatomic potentials, which are the interpolation potential and Lennard-Jones potential (LJ12,6) by the same phase φ. Shape resonances appear clearly in the l= 5 partial waves for the a3 Σu+state. Moreover, the s-wave scattering cross section, total cross section and energy positions of shape resonances are also discussed.

  8. Resonance neutron capture in 23Na and 27Al from 3 to 600 keV

    The radiative capture cross sections of 23Na and 27Al were measured with the high resolution facility at the 40 m station of the Oak Ridge Electron Linear Accelerator. Resonance parameters for the individual resonances below 600 keV are given. Particular care was taken to correct the data for prompt neutron scattering effects by Monte Carlo methods

  9. {sup 23}Na-MRI of recurrent glioblastoma multiforme after intraoperative radiotherapy: technical note

    Haneder, Stefan; Buesing, Karen A.; Schoenberg, Stefan O.; Ong, Melissa M. [Heidelberg University, Institute of Clinical Radiology and Nuclear Medicine, University Medical Center Mannheim, Medical Faculty Mannheim, Mannheim (Germany); Giordano, Frank A.; Wenz, Frederik [University of Heidelberg, Department of Radiation Oncology, University Medical Center Mannheim, Mannheim (Germany); Konstandin, Simon; Schad, Lothar R. [Heidelberg University, Computer Assisted Clinical Medicine, Mannheim (Germany); Brehmer, Stefanie; Schmiedek, Peter [Heidelberg University, Department of Neurosurgery, University Medical Center Mannheim, Mannheim (Germany)

    2015-03-01

    We report the first case of an intraoperative radiotherapy (IORT) in a patient with recurrent glioblastoma multiforme (GBM) who was followed up with a novel magnetic resonance imaging (MRI) method - {sup 23}Na-MRI - in comparison to a standard contrast-enhanced {sup 1}H-MRI and {sup 18}F-FET-PET. A 56-year-old female patient with diagnosed GBM in July 2012 underwent tumor resection, radiochemotherapy, and three cycles of chemotherapy. After a relapse, 6 months after the initial diagnosis, an IORT was recommended which was performed in March 2013 using the INTRABEAM system (Carl Zeiss Meditec AG, Germany) with a 3-cm applicator and a surface dose of 20 Gy. Early post-operative contrast-enhanced and 1-month follow-up {sup 1}H-MRI and a {sup 18}F-FET-PET were performed. In addition, an IRB-approved {sup 23}Na-MRI was performed on a 3.0-T MR scanner (MAGNETOM TimTrio, Siemens Healthcare, Germany). After re-surgery and IORT in March 2013, only a faint contrast enhancement but considerable surrounding edema was visible at the medio-posterior resection margins. In April 2013, new and progressive contrast enhancement, edema, {sup 23}Na content, and increased uptake in the {sup 18}F-FET-PET were visible, indicating tumor recurrence. Increased sodium content within the area of contrast enhancement was found in the {sup 23}Na-MRI, but also exceeding this area, very similar to the increased uptake depicted in the {sup 18}F-FET-PET. The clearly delineable zone of edema in both examinations exhibits a lower {sup 23}Na content compared to areas with suspected proliferating tumor tissue. {sup 23}Na-MRI provided similar information in the suspicious area compared to {sup 18}F-FET-PET, exceeding conventional {sup 1}H-MRI. Still, {sup 23}Na-MRI remains an investigational technique, which is worth to be further evaluated. (orig.)

  10. 23Na and 1H NMR studies on melittin channels activated by tricyclic tranquilizers.

    Tanaka, H.; Matsunaga, K.; Kawazura, H

    1992-01-01

    A dynamic 23Na nuclear magnetic resonance (NMR) technique was applied to the exchange system of Na+ ions present inside and outside large unilamellar vesicles at an equivalent concentration. Addition of melittin to phosphatidylcholine vesicles did not induce any detectable Na+ transport across the membrane but subsequent addition of a trace of chlorpromazine or imipramine did induce Na+ transport. Because the formation of a drug-melittin adduct in a solution was detected by 1H NMR, the activa...

  11. Pionic 2p-1s X-ray transitions in 19F and 23Na

    Pi-atomic 2p-1s transitions have been studied in 19F and 23Na. The measured energies are 195.17 +-0.16 and 275.75 +- 0.26 keV, and the Lorentzian full-widths at half-maximum are 10.12 +- 0.74 and 12.0 +- 1.2 keV respectively. A comparison is made with optical model calculations. (Auth.)

  12. Three new low-energy resonances in the $^{22}$Ne(p,$\\gamma$)$^{23}$Na reaction

    Cavanna, F; Aliotta, M; Anders, M; Bemmerer, D; Best, A; Böltzig, A; Broggini, C; Bruno, C G; Caciolli, A; Corvisiero, P; Davinson, T; di Leva, A; Elekes, Z; Ferraro, F; Formicola, A; Fülöp, Zs; Gervino, G; Guglielmetti, A; Gustavino, C; Gyürky, Gy; Imbriani, G; Junker, M; Menegazzo, R; Mossa, V; Pantaleo, F R; Prati, P; Scott, D A; Somorjai, E; Straniero, O; Strieder, F; Szücs, T; Takács, M P; Trezzi, D

    2015-01-01

    The $^{22}$Ne(p,$\\gamma$)$^{23}$Na reaction takes part in the neon-sodium cycle of hydrogen burning. This cycle affects the synthesis of the elements between $^{20}$Ne and $^{27}$Al in asymptotic giant branch stars and novae. The $^{22}$Ne(p,$\\gamma$)$^{23}$Na reaction rate is very uncertain because of a large number of unobserved resonances lying in the Gamow window. At proton energies below 400\\,keV, only upper limits exist in the literature for the resonance strengths. Previous reaction rate evaluations differ by large factors. In the present work, the first direct observations of the $^{22}$Ne(p,$\\gamma$)$^{23}$Na resonances at 156.2, 189.5, and 259.7\\,keV are reported. Their resonance strengths have been derived with 2-7\\% uncertainty. In addition, upper limits for three other resonances have been greatly reduced. Data were taken using a windowless $^{22}$Ne gas target and high-purity germanium detectors at the Laboratory for Underground Nuclear Astrophysics in the Gran Sasso laboratory of the National I...

  13. Investigation of Sodium Distribution in Phosphate Glasses Using Spin-Echo {sup 23}Na NMR

    ALAM, TODD M.; BOYLE, TIMOTHY J.; BROW, RICHARD K.; CLICK, CAROL C.; CONZONE, SAM; McLAUGHLIN, JAY; ZWANZIGER, JOE

    1999-09-16

    The spatial arrangement of sodium cations for a series of sodium phosphate glasses, xNa{sub 2}O(100-x)P{sub 2}O{sub 5} (x<55), were investigated using {sup 23}Na spin-echo NMR spectroscopy. The spin-echo decay rate is a function of the Na-Na homonuclear dipolar coupling and is related to the spatial proximity of neighboring Na nuclei. The spin-echo decay rate in these sodium phosphate glasses increases non-linearly with higher sodium number density, and thus provides a measure of the Na-Na extended range order. The results of these {sup 23}Na NMR experiments are discussed within the context of several structural models, including a decimated crystal lattice model, cubic dilation lattice model, a hard sphere (HS) random distribution model and a pair-wise cluster hard sphere model. While the experimental {sup 23}Na spin-echo M{sub 2} are described adequately by both the decimated lattice and the random HS model, it is demonstrated that the slight non-linear behavior of M{sub 2} as a function of sodium number density is more correctly described by the random distribution in the HS model. At low sodium number densities the experimental M{sub 2} is inconsistent with models incorporating Na-Na clustering. The ability to distinguish between Na-Na clusters and non-clustered distributions becomes more difficult at higher sodium concentrations.

  14. Three New Low-Energy Resonances in the 22Ne (p ,γ )23Na Reaction

    Cavanna, F.; Depalo, R.; Aliotta, M.; Anders, M.; Bemmerer, D.; Best, A.; Boeltzig, A.; Broggini, C.; Bruno, C. G.; Caciolli, A.; Corvisiero, P.; Davinson, T.; di Leva, A.; Elekes, Z.; Ferraro, F.; Formicola, A.; Fülöp, Zs.; Gervino, G.; Guglielmetti, A.; Gustavino, C.; Gyürky, Gy.; Imbriani, G.; Junker, M.; Menegazzo, R.; Mossa, V.; Pantaleo, F. R.; Prati, P.; Scott, D. A.; Somorjai, E.; Straniero, O.; Strieder, F.; Szücs, T.; Takács, M. P.; Trezzi, D.; LUNA Collaboration

    2015-12-01

    The 22Ne (p ,γ )23Na reaction takes part in the neon-sodium cycle of hydrogen burning. This cycle affects the synthesis of the elements between 20Ne and 27Al in asymptotic giant branch stars and novae. The 22Ne(p ,γ )23Na reaction rate is very uncertain because of a large number of unobserved resonances lying in the Gamow window. At proton energies below 400 keV, only upper limits exist in the literature for the resonance strengths. Previous reaction rate evaluations differ by large factors. In the present work, the first direct observations of the 22Ne (p ,γ )23Na resonances at 156.2, 189.5, and 259.7 keV are reported. Their resonance strengths are derived with 2%-7% uncertainty. In addition, upper limits for three other resonances are greatly reduced. Data are taken using a windowless 22Ne gas target and high-purity germanium detectors at the Laboratory for Underground Nuclear Astrophysics in the Gran Sasso laboratory of the National Institute for Nuclear Physics, Italy, taking advantage of the ultralow background observed deep underground. The new reaction rate is a factor of 20 higher than the recent evaluation at a temperature of 0.1 GK, relevant to nucleosynthesis in asymptotic giant branch stars.

  15. High spin states in 26Mg and 23Na populated by heavy ion reactions

    Two experiments were used to produce high-spin states in sd-shell nuclei. Beams of 18O and 15N were extracted from the Oak Ridge National Laboratory EN tandem van de Graaff accelerator. Alpha particles from the 12C(18O,α)26Mg and 12C-(15N,α)23Na reactions were detected with a Borkowski-Kopp proportional counter at the focal plane of an Enge split-pole magnetic spectrograph. The differential cross sections extracted for many levels in the respective residual nuclei were averaged over several bombarding energies. These cross sections were analyzed in the framework of the Hauser-Feshbach formalism applicable to compound nuclear reactions. Both reactions are shown to be generally well predicted by the statistical model, though an apparent anomaly exists for certain states observed in the 12C(15N,α)23Na reaction. Several of the high-spin states are discussed in terms of the rotational model, and levels in 23Na are compared to high-spin state predictions from large basis shell model calculations

  16. 3D {sup 23}Na MRI of human skeletal muscle at 7 Tesla: initial experience

    Chang, Gregory; Wang, Ligong; Regatte, Ravinder R. [Center for Biomedical Imaging/Hospital for Joint Diseases, Department of Radiology, NYU Langone Medical Center, New York, NY (United States); Schweitzer, Mark E. [Ottawa General Hospital, Department of Diagnostic Imaging, Ottawa, ON (Canada)

    2010-08-15

    To evaluate healthy skeletal muscle pre- and post-exercise via 7 T {sup 23}Na MRI and muscle proton T{sub 2} mapping, and to evaluate diabetic muscle pre- and post-exercise via 7 T {sup 23}Na MRI. The calves of seven healthy subjects underwent imaging pre- and post-exercise via 7 T {sup 23}Na MRI (3D fast low angle shot, TR/TE = 80 ms/0.160 ms, 4 mm x 4 mm x 4 mm) and 1 week later by {sup 1}H MRI (multiple spin-echo sequence, TR/TE = 3,000 ms/15-90 ms). Four type 2 diabetics also participated in the {sup 23}Na MRI protocol. Pre- and post-exercise sodium signal intensity (SI) and proton T{sub 2} relaxation values were measured/calculated for soleus (S), gastrocnemius (G), and a control, tibialis anterior (TA). Two-tailed t tests were performed. In S/G in healthy subjects post-exercise, sodium SI increased 8-13% (p < 0.03), then decreased (t{sub 1/2} = 22 min), and {sup 1}H T{sub 2} values increased 12-17% (p < 0.03), then decreased (t{sub 1/2} = 12-15 min). In TA, no significant changes in sodium SI or {sup 1}H T{sub 2} values were seen (-2.4 to 1%, p > 0.17). In S/G in diabetics, sodium SI increased 10-11% (p < 0.04), then decreased (t{sub 1/2} = 27-37 min) without significant change in the TA SI (-3.6%, p = 0.066). It is feasible to evaluate skeletal muscle via 3D {sup 23}Na MRI at 7 T. Post-exercise muscle {sup 1}H T{sub 2} values return to baseline more rapidly than sodium SI. Diabetics may demonstrate delayed muscle sodium SI recovery compared with healthy subjects. (orig.)

  17. 23Na-nuclear magnetic resonance investigation of gramicidin-induced ion transport through membranes under equilibrium conditions.

    Buster, D C; Hinton, J F; Millett, F S; Shungu, D C

    1988-01-01

    A technique for investigating the gramicidin-facilitated transport of Na+ ions across lipid bilayers of large unilamellar vesicles under the condition of ionic equilibrium has been developed using a combination of heat incubation of the gramicidin with the vesicles and 23Na-nuclear magnetic resonance (NMR) spectroscopy. Isolation of the two 23Na-NMR signals from the intra- and extravesicular Na+ with the shift reagent, dysprosium (III) tripolyphosphate, allows the equilibrium flux of Na+ thro...

  18. Decay properties of 266Bh and 262Db produced in the 248Cm+23Na reaction

    Decay properties of an isotope 266Bh and its daughter nucleus 262Db produced by the 248Cm(23Na,5n) reaction were studied by using a gas-filled recoil separator coupled with a position-sensitive semiconductor detector. 266Bh was clearly identified from the correlation of the known nuclide, 262Db. The obtained decay properties of 266Bh and 262Db are consistent with those observed in the 278113 chain, which provided further confirmation of the discovery of 278113. (author)

  19. R-Matrix Analysis of the Total and Inelastic Scattering Cross Section of 23Na

    Kopecky, Stefan; Plompen, Arjan

    2011-01-01

    Resonance parameters characterizing the interaction of neutrons with 23Na in the energy range from 0.3 to 2 MeV were obtained. These parameters describe the total and inelastic cross section. They were obtained from an analysis of data reported by Märten et al. for inelastic and elastic scattering and by D.C. Larson et al. for the total cross section. The data analysis and deduced resonance parameters are presented in some detail. This report serves to clarify the resonance parameters deliver...

  20. Optically pumped polarized 23Na vapor target for use in polarized ion source. Technical progress report

    We are currently measuring relaxation times in an optically pumped 23Na vapor target. Our research is directed toward improvements in the optically pumped Na vapor targets used for the production of polarized H- ions. In this progress report we review the properties of the optically pumped polarized H- ion source and especially the optically pumped Na vapor target employed in this source as well as discussing the progress of our research on relaxation times in an optically pumped Na vapor target. 30 references, 6 figures, 3 tables

  1. Quadrupolar-coupling-specific binomial pulse sequences for in vivo 23Na NMR and MRI.

    Laustsen, Christoffer; Ringgaard, Steffen; Pedersen, Michael; Nielsen, Niels Chr

    2010-09-01

    Aimed at selective detection of (23)Na with specific quadrupolar couplings for in vitro NMR and MRI, we present a series of quadrupolar binomial pulse sequences offering high specificity with respect to the quadrupolar couplings of the excited species. It is demonstrated that pulse sequences with an increasing number of elements, e.g., 11, 121, 1331, 14641, and 15101051, with the units representing flip angles smaller than the 90 degrees pulses typically encountered in binomial spin-1/2 solvent suppression experiments, and different phase combinations may provide a high degree of flexibility with respect to quadrupolar coupling selectivity and robustness towards rf inhomogeneity. This may facilitate efficient separation of, for example, intra and extracellular (23)Na in tissues with efficient control of the excitation (or suppression) of central as well as satellite transitions through on- and off-resonance irradiation. The pulse sequences are described in terms of their analogy to binomial liquid-state NMR solvent suppression experiments and demonstrated numerically and experimentally through NMR and MRI experiments on a 7 T horizontal small-bore animal magnet system. PMID:20673642

  2. Direct measurement of the 22Ne(p,γ)23Na reaction cross section at LUNA

    Ferraro, Federico; LUNA Collaboration

    2016-06-01

    The 22Ne(p, γ)23Na reaction takes part in the NeNa cycle of hydrogen burning, influencing the production of the elements between 20Ne and 27Al in red giant stars, asymptotic giant stars and classical novae. The 22Ne(p,γ)27Na reaction rate is very uncertain because of a large number of tentative resonances in the Gamow window, where only upper limits were quoted in literature. A direct measurement of the 22Ne(p, γ)23Na reaction cross section has been carried out at LUNA using a windowless differential-pumping gas target with two high- purity germanium (HPGe) detectors. A new measurement with a 4π bismuth germanate (BGO) summing detector is ongoing. During the HPGe phase of the experiment the strengths of the resonances at 156.2 keV, 189.5 keV and 259.7 keV have been directly measured for the first time and their contribution to the reaction rate has been calculated. The decay scheme of the newly discovered resonances has been established as well and some improved upper limits on the unobserved resonances have been put. The BGO detector with its 70% γ-detection efficiency allows to measure the cross section at lower energy. In order to further investigate the resonances at 71 keV and 105 keV and the direct-capture component, the data taking is ongoing.

  3. 23Na and 1H NMR Relaxometry of Shale at High Magnetic Field

    Yang, Donghan

    2016-01-01

    Formation evaluation of unconventional reservoirs is challenging due to the coexistence of different phases such as kerogen, bitumen, movable and bound light hydrocarbon and water. Current low-frequency (0.05 T) nuclear magnetic resonance (NMR) laboratory and logging methods are incapable of quantitatively separating the different phases. We demonstrate the utility of high-field (9 T) NMR 2D T1-T2 measurements for separating hydrocarbon and the clay-interacting aqueous phases in shale based on the difference in the frequency dependence of the spin-lattice relaxation time. Furthermore, we demonstrate 23Na NMR as a promising complementary technique to conventional 1H NMR for shale fluid typing, taking advantage of the fact that sodium ions are only present in the aqueous phase. We validate high-field (9 T) 23Na-1H NMR relaxometry for assessing brine-filled porosity and brine salinity in various porous materials, including porous glass, conventional rocks, clays, and shale, and apply it for differentiating hydro...

  4. 23Na-Magnetresonanzspektroskopie-Untersuchungen zum Verlauf der Narbenentwicklung nach Myokardinfarkt

    Scheffer H

    2001-01-01

    Full Text Available Magnetresonanzspektroskopie (MRS erlaubt die nichtinvasive Untersuchung der Konzentrationen von Stoffwechselprodukten und Ionen im Herzen. Der Gesamtnatrium (Na-Gehalt könnte für die Untersuchung der Vitalität von Myokardgewebe verwendet werden, jedoch gibt es keine Berichte über die Entwicklung des Na-Gehalts in der chronischen Infarktnarbe im Vergleich zum normalen Myokard. Die vorliegende Studie untersucht die Änderungen des myokardialen Na-Gehalts während der Narbenentwicklung nach einem Myokardinfarkt (MI am Modell der Koronarligatur in der Ratte. Ratten wurden einer Ligatur des Ramus intraventricularis anterior unterzogen. Myokardgewebe von Kontrolltieren sowie infarziertes Gewebe wurden 1, 3, 7, 28 und 56 Tage postoperativ entnommen und der Na-Gehalt mittels 23Na-MRS und Ionenchromatographie bestimmt. Der Na-Gehalt nach MI war zu allen Zeitpunkten bei beiden Bestimmungsmethoden auf Werte zwischen 306 und 160 % des Kontrollwertes erhöht (n = 6-8 je Gruppe, p 0,01 vs. Kontrolle. Der Na-Gehalt ist im chronisch infarzierten Myokardgewebe zu allen Zeitpunkten erhöht. Damit kann überlebendes Myokard von einer Infarktnarbe anhand des Na-Gehalts unterschieden werden. Diese Information könnte in der 23Na-Magnetresonanzbildgebung (MRI zur Bestimmung der Infarktnarbe eine klinische Anwendung finden.

  5. Functional MRI 2.0. {sup 23}Na and CEST imaging; Funktionelle MRT 2.0. {sup 23}Na- und CEST-Bildgebung

    Haneder, S. [Uniklinik Koeln, Institut fuer Diagnostische und Interventionelle Radiologie, Koeln (Germany); Konstandin, S. [Universitaet Bremen, MR-Bildgebung und -Spektroskopie, Fachbereich 1 (Physik/Elektrotechnik), Bremen (Germany); Fraunhofer MEVIS, Institut fuer Bildgestuetzte Medizin, Bremen (Germany)

    2016-02-15

    In recent years the purely morphological magnetic resonance imaging (MRI) has been increasingly flanked by so-called functional imaging methods, such as diffusion-weighted imaging (DWI), to obtain additional information about tissue or pathological processes. This review article presents two MR techniques that can detect physiological processes in the human body. In contrast to all other functional MR imaging techniques, which are based on hydrogen protons, the first technique presented (X-nuclei imaging) uses the spin of other nuclei for imaging and consequently allows a completely different insight into the human body. In this article X-nuclei imaging is focused on sodium ({sup 23}Na) MRI because it currently represents the main focus of research in this field due to the favorable MR properties of sodium. The second MR technique presented is the relatively novel chemical exchange saturation transfer (CEST) imaging that can detect exchange processes between protons in metabolites and protons in free water. The first part of this article introduces the basic technical principles, problems, advantages and disadvantages of these two MR techniques, whereas the second part highlights the potential clinical applications. Examples illustrate several potential applications in neuroimaging (e. g. stroke and tumors), musculoskeletal imaging (e. g. osteoarthritis and degenerative processes) and abdominal imaging (e. g. kidneys and hypertension). Both techniques inherently contain an incredible potential for future imaging but are still on the threshold of clinical use and are currently under evaluation in many university centers. (orig.) [German] In den letzten Jahren wird die reine morphologische Magnetresonanztomographie (MRT) zunehmend von sogenannten funktionellen Bildgebungsmethoden, wie der diffusionsgewichteten Bildgebung (''diffusion-weighted imaging'', DWI), flankiert, um zusaetzliche Informationen ueber Gewebe oder pathologische Prozesse zu

  6. Dose-dependent changes in renal {sup 1}H-/{sup 23}Na MRI after adjuvant radiochemotherapy for gastric cancer

    Haneder, Stefan [University Medical Centre Mannheim, University of Heidelberg, Institute of Clinical Radiology and Nuclear Medicine, Mannheim (Germany); University Hospital of Cologne, Department of Radiology, Cologne (Germany); Budjan, Johannes Michael; Schoenberg, Stefan Oswald [University Medical Centre Mannheim, University of Heidelberg, Institute of Clinical Radiology and Nuclear Medicine, Mannheim (Germany); Konstandin, Simon; Schad, Lothar Rudi [University Medical Centre Mannheim, University of Heidelberg, Computer Assisted Clinical Medicine, Mannheim (Germany); Hofheinz, Ralf Dieter [University Medical Centre Mannheim, University of Heidelberg, III. Department of Internal Medicine, Mannheim (Germany); Gramlich, Veronika; Wenz, Frederik; Lohr, Frank; Boda-Heggemann, Judit [University Medical Centre Mannheim, Medical Faculty Mannheim - University of Heidelberg, Department of Radiation Oncology, Mannheim (Germany)

    2015-04-01

    Combined radiochemotherapy (RCT) for gastric cancer with three-dimensional conformal radiotherapy (3D-CRT) results in ablative doses to the upper left kidney, while image-guided intensity-modulated radiotherapy (IG-IMRT) allows kidney sparing despite improved target coverage. Renal function in long-term gastric cancer survivors was evaluated with 3T functional magnetic resonance imaging (MRI) including diffusion-weighted imaging (DWI) and {sup 23}Na imaging. Five healthy volunteers and 13 patients after radiotherapy were included: 11 x IG-IMRT; 1 x 3D-CRT; 1 x ''positive control'' with stereotactic body radiotherapy (SBRT) of a metastasis between the spleen/left kidney. Radiation doses were documented for the upper/middle/lower kidney subvolumes. Late toxicity was evaluated based on CTC criteria, questionnaire, and creatinine values. Morphological sequences, DWI images, and {sup 23}Na images were acquired using a {sup 1}H/{sup 23}Na-tuned body-coil before/after intravenous water load (WL). Statistics for [{sup 23}Na] (concentration) and apparent diffusion coefficient (ADC) values were calculated for upper/middle/lower renal subvolumes. Corticomedullary [{sup 23}Na] gradients and [{sup 23}Na] differences after WL were determined. No major morphological alteration was detected in any patient. Minor scars were observed in the cranial subvolume of the left kidney of the 3D-CRT and the whole kidney of the control SBRT patient. All participants presented a corticomedullary [{sup 23}Na] gradient. After WL, a significant physiological [{sup 23}Na] gradient decrease (p < 0.001) was observed in all HV and IG-IMRT patients. In the cranial left kidney of the 3D-CRT patient and the positive control SBRT patient, the decrease was nonsignificant (p = 0.01, p = 0.02). ADC values were altered nonsignificantly in all renal subvolumes (all participants). Renal subvolumes with doses ≥ 35 Gy showed a reduced change of the [{sup 23}Na] gradient after WL (p = 0

  7. Application of potential harmonic expansion method to BEC: Thermodynamic properties of trapped 23Na atoms

    Anasuya Kundu; Barnali Chakrabarti; Tapan Kumar Das

    2005-07-01

    We adopt the potential harmonics expansion method for an ab initio solution of the many-body system in a Bose condensate containing interacting bosons. Unlike commonly adopted mean-field theories, our method is capable of handling two-body correlation properly. We disregard three- and higher-body correlations. This simplification is ideally suited to dilute Bose Einstein condensates, whose number density is required to be so small that the interparticle separation is much larger than the range of two-body interaction to avoid three- and higher-body collisions, leading to the formation of molecules and consequent instability of the condensate. In our method we can incorporate realistic finite range interactions. We calculate energies of low-lying states of a condensate containing 23Na atoms and some thermodynamical properties of the condensate.

  8. Investigation of thermal neutron capture in 23Na, 138Ba, 140Ce and 142Ce

    A measurement of the angular correlation of γ-rays emitted in the capture of thermal neutrons in 23Na has been used to determine the multipole mixing ratio delta for seventeen transitions in 24Na, of which seven are primary transitions. For these primary transitions also the capture state spin admixture α has been derived. The neutron capture reaction proceeds predominantly through the Jsup(π)=1+ channel, as expected from previous cross-section measurements. A measurement of the circular polarization of γ-rays resulting from the capture of polarized thermal neutrons in 138Ba, 140Ce and 142Ce has yielded spin assignments for p-states in the final nuclei. Excitation energies and reaction Q-values have been obtained from the analysis of singles spectra taken with unpolarized neutrons. (Auth.)

  9. Změna formy živnostenského podnikání

    Megová, Simona

    2012-01-01

    Táto bakalárska práca sa zaoberá zmenou formy živnostenského podniku na spoločnosť s ručením obmedzeným. Informuje o výhodách a nevýhodách spoločnosti s ručením obmedzeným oproti živnosti a navrhuje postup pri založení spoločnosti. Cieľom bakalárskej práce je poskytnúť firme Mego pravdivé a aktuálne informácie o výhodách a nevýhodách transformácie živnosti na spoločnosť s ručením obmedzeným a navrhnúť postup pri zmene právnej formy, ako aj rozvoji spoločnosti....

  10. Long Hyperfine Coherence Time of Ultracold Fermionic 23 Na40 K Molecules

    Park, Jee Woo; Yan, Zoe; Loh, Huanqian; Will, Sebastian; Zwierlein, Martin

    2016-05-01

    Ultracold molecules created and trapped at sub uK temperatures allow the full control of the molecule's external and internal degrees of freedom down to a single hyperfine state. In particular, an ensemble of molecules all initialized in a single rotational and hyperfine state can be prepared and be coherently addressed using microwave fields. In this talk, we report on the observation of long coherence time between two hyperfine states of fermionic 23 Na40 K molecules in the ro-vibronic ground state (v = 0 , J = 0). A direct two-photon microwave transition via the J = 1 state is used to prepare a superposition of two lowest hyperfine states of J = 0 , and we perform Ramsey spectroscopy as a direct probe of phase coherence between these states. The fermionic nature of the molecules and the lack of electronic angular momentum in the ro-vibronic ground state heavily suppress the decoherence from collisions and external fields, respectively, and we observe long coherence times upto 0.5 sec for this hyperfine superposition state. The observed long coherence time is a crucial step for applications of trapped dipolar molecules in quantum information processing schemes.

  11. Measurement of (23)Na(n,2n) cross section in well-defined reactor spectra.

    Košťál, Michal; Švadlenková, Marie; Baroň, Petr; Milčák, Ján; Mareček, Martin; Uhlíř, Jan

    2016-05-01

    The present paper aims to compare the calculated and experimental reaction rates of (23)Na(n,2n)(22)Na in a well-defined reactor spectra of a special core assembled in the LR-0 reactor. The experimentally determined reaction rate, derived using gamma spectroscopy of irradiated NaF sample, is used for average cross section determination. The resulting value averaged in spectra is 0.91±0.02µb. This cross-section is important as it is included in International Reactor Dosimetry and Fusion File and is also relevant to the correct estimation of long-term activity of Na coolant in Sodium Fast Reactors. The calculations were performed with the MCNP6 code using ENDF/B-VII.0, JEFF-3.1, JEFF-3.2, JENDL-3.3, JENDL-4, ROSFOND-2010 and CENDL-3.1 nuclear data libraries. Generally the best C/E agreement, within 2%, was found using the ROSFOND-2010 data set, whereas the worst, as high as 40%, was found using the ENDF/B-VII.0. PMID:26894323

  12. Quantitative sodium MR imaging of native versus transplanted kidneys using a dual-tuned proton/sodium ({sup 1}H/{sup 23}Na) coil: initial experience

    Moon, Chan Hong; Furlan, Alessandro [University of Pittsburgh, Department of Radiology, Pittsburgh, PA (United States); Kim, Jung-Hwan; Bae, Kyongtae Ty [University of Pittsburgh, Department of Radiology, Pittsburgh, PA (United States); University of Pittsburgh, Department of Bioengineering, Pittsburgh, PA (United States); Zhao, Tiejun [MR R and D Collaborations, Siemens Medical Solutions USA, Inc, Pittsburgh, PA (United States); Shapiro, Ron [Thomas E. Starzl Transplantation Institute, Department of Surgery, Pittsburgh, PA (United States)

    2014-06-15

    To compare sodium ({sup 23}Na) characteristics between native and transplanted kidneys using dual-tuned proton ({sup 1}H)/sodium MRI. Six healthy volunteers and six renal transplant patients (3 normal function, 3 acute allograft rejection) were included. Proton/sodium MRI was obtained at 3 T using a dual-tuned coil. Signal to noise ratio (SNR), sodium concentration ([{sup 23}Na]) and cortico-medullary sodium gradient (CMSG) were measured. Reproducibility of [{sup 23}Na] measurement was also tested. SNR, [{sup 23}Na] and CMSG of the native and transplanted kidneys were compared. Proton and sodium images of kidneys were successfully acquired. SNR and [{sup 23}Na] measurements of the native kidneys were reproducible at two different sessions. [{sup 23}Na] and CMSG of the transplanted kidneys was significantly lower than those of the native kidneys: 153.5 ± 11.9 vs. 192.9 ± 9.6 mM (P = 0.002) and 8.9 ± 1.5 vs. 10.5 ± 0.9 mM/mm (P = 0.041), respectively. [{sup 23}Na] and CMSG of the transplanted kidneys with normal function vs. acute rejection were not statistically different. Sodium quantification of kidneys was reliably performed using proton/sodium MRI. [{sup 23}Na] and CMSG of the transplanted kidneys were lower than those of the native kidneys, but without a statistically significant difference between patients with or without renal allograft rejection. (orig.)

  13. Quantitative sodium MR imaging of native versus transplanted kidneys using a dual-tuned proton/sodium (1H/23Na) coil: initial experience

    To compare sodium (23Na) characteristics between native and transplanted kidneys using dual-tuned proton (1H)/sodium MRI. Six healthy volunteers and six renal transplant patients (3 normal function, 3 acute allograft rejection) were included. Proton/sodium MRI was obtained at 3 T using a dual-tuned coil. Signal to noise ratio (SNR), sodium concentration ([23Na]) and cortico-medullary sodium gradient (CMSG) were measured. Reproducibility of [23Na] measurement was also tested. SNR, [23Na] and CMSG of the native and transplanted kidneys were compared. Proton and sodium images of kidneys were successfully acquired. SNR and [23Na] measurements of the native kidneys were reproducible at two different sessions. [23Na] and CMSG of the transplanted kidneys was significantly lower than those of the native kidneys: 153.5 ± 11.9 vs. 192.9 ± 9.6 mM (P = 0.002) and 8.9 ± 1.5 vs. 10.5 ± 0.9 mM/mm (P = 0.041), respectively. [23Na] and CMSG of the transplanted kidneys with normal function vs. acute rejection were not statistically different. Sodium quantification of kidneys was reliably performed using proton/sodium MRI. [23Na] and CMSG of the transplanted kidneys were lower than those of the native kidneys, but without a statistically significant difference between patients with or without renal allograft rejection. (orig.)

  14. Formy a metody motivace manažera ve stavebnictví

    Mlčoch, Ondřej

    2014-01-01

    Diplomová práce „Formy a metody motivace manažera ve stavebnictví“ se zabývá problematikou motivování vedoucích pracovníků stavebních firem. Teoretická práce obsahuje vysvětlení základních pojmů potřebných k pochopení základního pohledu na motivaci a řízení, motivačních teorií a stylů řízení. Praktická část práce analyzuje současnou situaci ve stavebnictví a doporučuje postupy pro možná zlepšení pracovního prostředí firmy.

  15. Discrimination of intra- and extracellular 23Na + signals in yeast cell suspensions using longitudinal magnetic resonance relaxography

    Zhang, Yajie; Poirer-Quinot, Marie; Springer, Charles S.; Balschi, James A.

    2010-07-01

    This study tested the ability of MR relaxography (MRR) to discriminate intra- (Nai+) and extracellular (Nae+)23Na + signals using their longitudinal relaxation time constant ( T1) values. Na +-loaded yeast cell ( Saccharomyces cerevisiae) suspensions were investigated. Two types of compartmental 23Na +T1 differences were examined: a selective Nae+T1 decrease induced by an extracellular relaxation reagent (RR e), GdDOTP 5-; and, an intrinsic T1 difference. Parallel studies using the established method of 23Na MRS with an extracellular shift reagent (SR e), TmDOTP 5-, were used to validate the MRR measurements. With 12.8 mM RR e, the 23Nae+T1 was 2.4 ms and the 23Nai+T1 was 9.5 ms (9.4T, 24 °C). The Na + amounts and spontaneous efflux rate constants were found to be identical within experimental error whether measured by MRR/RR e or by MRS/SR e. Without RR e, the Na +-loaded yeast cell suspension 23Na MR signal exhibited two T1 values, 9.1 (±0.3) ms and 32.7 (±2.3) ms, assigned to 23Nai+ and 23Nae+, respectively. The Nai+ content measured was lower, 0.88 (±0.06); while Nae+ was higher, 1.43 (±0.12) compared with MRS/SR e measures on the same samples. However, the measured efflux rate constant was identical. T1 MRR potentially may be used for Nai+ determination in vivo and Na + flux measurements; with RR e for animal studies and without RR e for humans.

  16. Experimental study of the {sup 22}Ne(p,{gamma}){sup 23}Na reaction and its implications for novae scenarios

    Menzel, Marie-Luise

    2013-08-01

    The {sup 22}Ne(p,{gamma}){sup 23}Na reaction belongs to the catalytic neon-sodium cycle and has an important role in the explosive hydrogen burning. The neon-sodium cycle takes place at temperatures of T = 0.1 - 0.5 GK and is assumed to occur in different astrophysical systems: e.g. in novae, in super novae of type Ia and during the shell-burning of red giant branch stars. The implications of {sup 22}Ne(p,{gamma}){sup 23}Na and the neon-sodium cycle in a nova scenario have been studied by using the nuclear network code libnucnet at GSI in Darmstadt. A nova is an outburst of matter in a binary system consisting of a white dwarf and a red giant star. It is therefore a representative phenomenon for explosive hydrogen burning. For the calculation of the nucleosynthesis during the nova outburst, the code libnucnet requires the initial mass composition of the novae partners, the temperature and density profiles of the nova explosion and the thermonuclear reaction rates of the participating reactions. In the following, the code determined the flow and the final atomic abundance in the neon-sodium cycle during the entire nova process. Additionally, the influence of the temperature profile of the novae outburst as well as the thermonuclear reaction rate of the {sup 22}Ne(p,{gamma}){sup 23}Na reaction on the final atomic abundance in the outburst has been studied. A characteristic measure for the reactions in astrophysical environments is the thermonuclear reaction rate. The reaction rate of {sup 22}Ne(p,{gamma}){sup 23}Na has still strong uncertainties in the temperature range of T = 0.03 - 0.3 GK. These uncertainties are based on insufficient upper limits of the resonance strengths as well as the possible existence of tentative states that are populated in the energy range of E{sup lab}{sub p} = 30 - 300 keV. The research presented in this thesis is dedicated to the experimental study of the {sup 22}Ne(p,{gamma}){sup 23}Na reaction for an improved determination of the

  17. Experimental study of the 22Ne(p,γ)23Na reaction and its implications for novae scenarios

    The 22Ne(p,γ)23Na reaction belongs to the catalytic neon-sodium cycle and has an important role in the explosive hydrogen burning. The neon-sodium cycle takes place at temperatures of T = 0.1 - 0.5 GK and is assumed to occur in different astrophysical systems: e.g. in novae, in super novae of type Ia and during the shell-burning of red giant branch stars. The implications of 22Ne(p,γ)23Na and the neon-sodium cycle in a nova scenario have been studied by using the nuclear network code libnucnet at GSI in Darmstadt. A nova is an outburst of matter in a binary system consisting of a white dwarf and a red giant star. It is therefore a representative phenomenon for explosive hydrogen burning. For the calculation of the nucleosynthesis during the nova outburst, the code libnucnet requires the initial mass composition of the novae partners, the temperature and density profiles of the nova explosion and the thermonuclear reaction rates of the participating reactions. In the following, the code determined the flow and the final atomic abundance in the neon-sodium cycle during the entire nova process. Additionally, the influence of the temperature profile of the novae outburst as well as the thermonuclear reaction rate of the 22Ne(p,γ)23Na reaction on the final atomic abundance in the outburst has been studied. A characteristic measure for the reactions in astrophysical environments is the thermonuclear reaction rate. The reaction rate of 22Ne(p,γ)23Na has still strong uncertainties in the temperature range of T = 0.03 - 0.3 GK. These uncertainties are based on insufficient upper limits of the resonance strengths as well as the possible existence of tentative states that are populated in the energy range of Elabp = 30 - 300 keV. The research presented in this thesis is dedicated to the experimental study of the 22Ne(p,γ)23Na reaction for an improved determination of the thermonuclear reaction rate. Furthermore, the implications of 22Ne(p,γ)23Na and the neon

  18. Sepsis does not alter red blood cell glucose metabolism or Na+ concentration: A 2H-, 23Na-NMR study

    The effects of sepsis on intracellular Na+ concentration ([Na+]i) and glucose metabolism were examined in rat red blood cells (RBCs) by using 23Na- and 2H-nuclear magnetic resonance (NMR) spectroscopy. Sepsis was induced in 15 halothane-anesthetized female Sprague-Dawley rats by using the cecal ligation and perforation technique; 14 control rats underwent cecal manipulation without ligation. The animals were fasted for 36 h, but allowed free access to water. At 36 h postsurgery, RBCs were examined by 23Na-NMR by using dysprosium tripolyphosphate as a chemical shift reagent. Human RBCs from 17 critically ill nonseptic patients and from 7 patients who were diagnosed as septic were also examined for [Na+]i. Five rat RBC specimens had [Na+]i determined by both 23Na-NMR and inductively coupled plasma-atomic emission spectroscopy (ICP-AES). For glucose metabolism studies, RBCs from septic and control rats were suspended in modified Krebs-Henseleit buffer containing [6,6-2H2]glucose and examined by 2H-NMR. No significant differences in [Na+]i or glucose utilization were found in RBCs from control or septic rats. There were no differences in [Na+]i in the two groups of patients. The [Na+]i determined by NMR spectroscopy agreed closely with measurements using ICP-AES and establish that 100% of the [Na+]i of the RBC is visible by NMR. Glucose measurements determined by 2H-NMR correlated closely (correlation coefficient = 0.93) with enzymatic analysis. These studies showed no evidence that sepsis disturbed RBC membrane function or metabolism

  19. 23Na NMR and FT-IR studies of sodium complexes with the ionophore lasalocid in solution

    Schroeder, G.; Gierczyk, B.; Brzezinski, B.; Różalski, B.; Bartl, F.; Zundel, G.; Sośnicki, J.; Grech, E.

    2000-01-01

    Lasalocid forms 1:1 or 2:2 complexes with sodium ions. The process of complexation was studied in different solvents at various temperatures by 23Na NMR. The formation constants and Δ G values were determined. The nature of the complex between lasalocid and Na + ions was also studied by FT-IR spectroscopy. In chloroform, a 2:2 complex of lasalocid and Na + ions is formed. A continuous absorption is observed in the far FT-IR spectrum of this complex. It indicates the large Na + polarizability due to fast fluctuations of the Na + ions in multiminima potentials, in the dimeric structure.

  20. A double-tuned 1H/23Na dual resonator system for tissue sodium concentration measurements in the rat brain via Na-MRI

    A method for quantifying the tissue sodium concentration (TSC) in the rat brain from 23Na-MR images was developed. TSC is known to change in a variety of common human diseases and holds considerable potential to contribute to their study; however, its accurate measurement in small laboratory animals has been hindered by the extremely low signal to noise ratio (SNR) in 23Na images. To address this, the design, construction and characterization of a double-tuned 1H/23Na dual resonator system for 1H-guided quantitative 23Na-MRI are described. This system comprises an SNR-optimized surface detector coil for 23Na image acquisition, and a volume resonator producing a highly homogeneous B1 field (23Na resonance frequency. A quantification accuracy of TSC of <10 mM was achieved in Na-images with 1.2 μl voxel resolution acquired in 10 min. The potential of the quantification technique was demonstrated in an in vivo experiment of a rat model of cerebral stroke, where the evolution of the TSC was successfully monitored for 8 h after the stroke was induced.

  1. Crystalline phase of sodium germanate system determined by x-ray diffraction and 23Na magic angle spinning nuclear magnetic resonance

    Crystalline products of sodium germanate glasses system with composition from 10 mol% to 50 mol% Na2O have been investigated using 23Na magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy and x-ray diffraction (XRD). Fitting of the 23Na NMR spectra of the crystalline phases concerning different crystallographically sodium atom in sodium germanate system are reasonably reproducible as observed by the spectra obtained. The line shape simulations of the 23Na NMR spectra yielded NMR quadrupolar parameters such as nuclear quadrupole coupling constants (CQ), asymmetry parameters (η), and isotropic chemical shifts (δi). 23Na NMR isotropic chemical shift may also provide further information on the structural environment of the sodium atom. A simple correlation between structure and NMR parameters to be tested can be used to probe the structure of sodium germanate glasses. The experimental 23Na chemical shifts correlate well with an empirical shift parameter based on the total oxygen-cation bond valence and Na-O distances of all oxygen atoms in the first coordination sphere of the sodium cation. In this study the different phases in the sodium germanate system were identified. These results show that 23Na NMR can provide examples of the types of structural information for sodium germanate system. (Author)

  2. Practical design of a 4 Tesla double-tuned RF surface coil for interleaved 1H and 23Na MRI of rat brain

    Alecci, M.; Romanzetti, S.; Kaffanke, J.; Celik, A.; Wegener, H. P.; Shah, N. J.

    2006-08-01

    MRI is proving to be a very useful tool for sodium quantification in animal models of stroke, ischemia, and cancer. In this work, we present the practical design of a dual-frequency RF surface coil that provides 1H and 23Na images of the rat head at 4 T. The dual-frequency RF surface coil comprised of a large loop tuned to the 1H frequency and a smaller co-planar loop tuned to the 23Na frequency. The mutual coupling between the two loops was eliminated by the use of a trap circuit inserted in the smaller coil. This independent-loop design was versatile since it enabled a separate optimisation of the sensitivity and RF field distributions of the two coils. To allow for an easy extension of this simple double-tuned coil design to other frequencies (nuclei) and dimensions, we describe in detail the practical aspects of the workbench design and MRI testing using a phantom that mimics in vivo conditions. A comparison between our independent-loop, double-tuned coil and a single-tuned 23Na coil of equal size obtained with a phantom matching in vivo conditions, showed a reduction of the 23Na sensitivity (about 28 %) because of signal losses in the trap inductance. Typical congruent 1H and 23Na rat brain images showing good SNR ( 23Na: brain 7, ventricular cerebrospinal fluid 11) and spatial resolution ( 23Na: 1.25 × 1.25 × 5 mm 3) are also reported. The in vivo SNR values obtained with this coil were comparable to, if not better than, other contemporary designs in the literature.

  3. A 125Te and 23Na NMR investigation of the structure and crystallisation of sodium tellurite glasses.

    Holland, D; Bailey, J; Ward, G; Turner, B; Tierney, P; Dupree, R

    2005-01-01

    125Te static nuclear magnetic resonance (NMR) and 23Na and 125Te magic angle spinning (MAS) NMR have been used, in conjunction with X-ray diffraction, to examine the structure and crystallisation behaviour of glasses of composition xNa2O.(1-x)TeO2 (0.075 x 0.4). The MAS NMR 23Na spectra from the glasses are broad and featureless but shift by approximately +5 ppm with increased x, i.e. as the system becomes more ionic. The static 125Te NMR spectra show an increase in axial symmetry with increasing x, indicating a shift from predominantly [TeO4] to [TeO3] structural units. The 23Na and 125Te spectra from the crystallised samples have been fitted to obtain information on the sites in the metastable crystal phases, which are the first to form on heating and which are therefore more closely related to the glass structure than thermodynamically stable crystal phases. New sodium tellurite phases are reported, including a sodium stabilised, face centred cubic phase related to delta-TeO2; a metastable form of Na2Te4O9 containing 3 sodium and 4 tellurium sites; and a metastable form of Na2Te2O5 containing 2 sodium sites. There is evidence of oxidation of TeIV to TeVI occurring in glasses with high values of x and, at x=0.40 and 0.50 (outside the glass forming range), some sodium metatellurate (Na2TeO4) is formed at the same time as sodium metatellurite (Na2TeO3). The 125Te shift is very sensitive to environment within the sodium tellurite system, covering more than 320 ppm, with anisotropies varying from 640 to 1540 ppm. The lack of features in the 125Te spectra of the glass phases, combined with the large shift range and high but variable anisotropy, means than it is not possible to obtain a unique fit to any presumed species present. Furthermore, the chemical shift anisotropy parameters for three of the four Te sites in the Na2Te4O9 phase are found to lie outside the range used for previous simulations of glass spectra. PMID:15589724

  4. Positive and Negative Mixed Glass Former Effects in Sodium Borosilicate and Borophosphate Glasses Studied by (23)Na NMR.

    Storek, Michael; Adjei-Acheamfour, Mischa; Christensen, Randilynn; Martin, Steve W; Böhmer, Roland

    2016-05-19

    Glasses with varying compositions of constituent network formers but constant mobile ion content can display minima or maxima in their ion transport which are known as the negative or the positive mixed glass former effect, MGFE, respectively. Various nuclear magnetic resonance (NMR) techniques are used to probe the ion hopping dynamics via the (23)Na nucleus on the microscopic level, and the results are compared with those from conductivity spectroscopy, which are more sensitive to the macroscopic charge carrier mobility. In this way, the current work examines two series of sodium borosilicate and sodium borophosphate glasses that display positive and negative MGFEs, respectively, in the composition dependence of their Na(+) ion conductivities at intermediate compositions of boron oxide substitution for silicon oxide and phosphorus oxide, respectively. A coherent theoretical analysis is performed for these glasses which jointly captures the results from measurements of spin relaxation and central-transition line shapes. On this basis and including new information from (11)B magic-angle spinning NMR regarding the speciation in the sodium borosilicate glasses, a comparison is carried out with predictions from theoretical approaches, notably from the network unit trap model. This comparison yields detailed insights into how a variation of the boron oxide content and thus of either the population of silicon or phosphorus containing network-forming units with different charge-trapping capabilities leads to nonlinear changes of the microscopic transport properties. PMID:27092392

  5. Hyperfine splitting and isotope shift of 22Na, 23Na by high resolution laser spectroscopy at the atomic D2-line

    The hyperfine structure of D2 optical line in 22Na and 23Na has been investigated using high resolution laser spectroscopy of a well-collimated atomic beam. The hyperfine splitting constants A and B for the excited 3p2P3/2 level for both investigated sodium isotopes have been obtained. They are as follows: A(22)=7.31(4) MHz, B(22)=4.71(28) MHz, A(23)=18.572(24) MHz, B(23)=2.723(55) MHz. With these data, using the high precision MCHFF calculations for the electric field gradient at the nucleus, the electric quadrupole moment of 22Na has been deduced: Qs(22)=+0.185(11) b. The sign of Qs(22), determined for the first time, indicates a prolate nuclear deformation. Precise value of the isotope shift 22,23Na in D2-line has also been obtained

  6. Sodium ion dynamics in a sulfonate based ionomer system studied by 23Na solid-state nuclear magnetic resonance and impedance spectroscopy

    A poly(2-acrylamido-2-methyl-1-propane-sulphonate) (PAMPS) ionomer containing both sodium and quaternary ammonium cations functionalised with an ether group, has been characterised in terms of its thermal properties, ionic conductivity and sodium ion dynamics. The ether oxygen was incorporated to reduce the Na+ association with the anionic sulfonate groups tethered to the polymer backbone, thereby promoting ion dissociation and ultimately enhancing the ionic conductivity. This functionalised ammonium cation led to a significant reduction in the ionomer Tg compared to an analogue system without an ether group, resulting in an increase in ionic conductivity of approximately four orders of magnitude. The sodium ion dynamics were probed by 23Na solid-state NMR, which allowed the signals from the dissociated (mobile) and bound Na+ cations to be distinguished. This demonstrates the utility of 23Na solid-state NMR as a probe of sodium dynamics in ionomer systems

  7. The 12C(12C,α)20Ne and 12C(12C,p)23Na reactions at the Gamow peak via the Trojan Horse Method

    Tumino, A.; Spitaleri, C.; Cherubini, S.; Guardo, L.; Gulino, M.; Indelicato, I.; La Cognata, M.; Lamia, L.; Pizzone, R. G.; Puglia, S. M. R.; Rapisarda, G. G.; Romano, S.; Sergi, M. L.; Spartá, R.

    2016-05-01

    A measurement of the 12C(14N,α20Ne)2H and 12C(14N,p23Na)2Hreactions has been performed at a 14N beam energy of 30.0 MeV. The experiment aims to explore the extent to which contributing 24Mg excited states can be populated in the quasi-free reaction off the deuteron in 14N. In particular, the 24Mg excitation region explored in the measurement plays a key role in stellar carbon burning whose cross section is commonly determined by extrapolating high-energy fusion data. From preliminary results, α and proton channels are clearly identified. In particular, ground and first excited states of 20Ne and 23Na play a major role.

  8. The 12C(12C,α20Ne and 12C(12C,p23Na reactions at the Gamow peak via the Trojan Horse Method

    Tumino A.

    2016-01-01

    Full Text Available A measurement of the 12C(14N,α20Ne2H and 12C(14N,p23Na2Hreactions has been performed at a 14N beam energy of 30.0 MeV. The experiment aims to explore the extent to which contributing 24Mg excited states can be populated in the quasi-free reaction off the deuteron in 14N. In particular, the 24Mg excitation region explored in the measurement plays a key role in stellar carbon burning whose cross section is commonly determined by extrapolating high-energy fusion data. From preliminary results, α and proton channels are clearly identified. In particular, ground and first excited states of 20Ne and 23Na play a major role.

  9. The measurement of (n,2n) cross section for 23Na at 13.3 to 18.5 MeV

    The (n,2n) cross-section for 23Na has been measured by the activation method in the energy range 13.3 to 18.5 MeV. Monoenergitic neutrons were obtained from T(d,n)4He reaction with 2.3 MeV deuteron energy. The induced specific activities were detected by a coincidence counting setup. For comparison existed data and theoretical calculation from 12∼20 MeV are also given

  10. Scan time reduction in {sup 23}Na-Magnetic Resonance Imaging using the chemical shift imaging sequence. Evaluation of an iterative reconstruction method

    Weingaertner, Sebastian; Konstandin, Simon; Schad, Lothar R. [Heidelberg Univ., Mannheim (Germany). Computer Assisted Clinical Medicine; Wetterling, Friedrich [Heidelberg Univ., Mannheim (Germany). Computer Assisted Clinical Medicine; Dublin Univ. (Ireland) Trinity Inst. of Neuroscience; Fatar, Marc [Heidelberg Univ., Mannheim (Germany). Dept. of Neurology; Neumaier-Probst, Eva [Heidelberg Univ., Mannheim (Germany). Dept. of Neuroradiology

    2015-07-01

    To evaluate potential scan time reduction in {sup 23}Na-Magnetic Resonance Imaging with the chemical shift imaging sequence (CSI) using undersampled data of high-quality datasets, reconstructed with an iterative constrained reconstruction, compared to reduced resolution or reduced signal-to-noise ratio. CSI {sup 23}Na-images were retrospectively undersampled and reconstructed with a constrained reconstruction scheme. The results were compared to conventional methods of scan time reduction. The constrained reconstruction scheme used a phase constraint and a finite object support, which was extracted from a spatially registered {sup 1}H-image acquired with a double-tuned coil. The methods were evaluated using numerical simulations, phantom images and in-vivo images of a healthy volunteer and a patient who suffered from cerebral ischemic stroke. The constrained reconstruction scheme showed improved image quality compared to a decreased number of averages, images with decreased resolution or circular undersampling with weighted averaging for any undersampling factor. Brain images of a stroke patient, which were reconstructed from three-fold undersampled k-space data, resulted in only minor differences from the original image (normalized root means square error < 12%) and an almost identical delineation of the stroke region (mismatch < 6%). The acquisition of undersampled {sup 23}Na-CSI images enables up to three-fold scan time reduction with improved image quality compared to conventional methods of scan time saving.

  11. In Situ 13C and 23Na Magic Angle Spinning NMR Investigation of Supercritical CO2 Incorporation in Smectite-Natural Organic Matter Composites

    Bowers, Geoffrey M.; Hoyt, David W.; Burton, Sarah D.; Ferguson, Brennan O.; Varga, Tamas; Kirkpatrick, Robert J.

    2014-01-29

    This paper presents an in situ NMR study of clay-natural organic polymer systems (a hectoritehumic acid [HA] composite) under CO2 storage reservoir conditions (90 bars CO2 pressure, 50°C). The 13C and 23Na NMR data show that supercritical CO2 interacts more strongly with the composite than with the base clay and does not react to form other C-containing species over several days at elevated CO2. With and without organic matter, the data suggest that CO2 enters the interlayer space of Na-hectorite equilibrated at 43% relative humidity. The presence of supercritical CO2 also leads to increased 23Na signal intensity, reduced line width at half height, increased basal width, more rapid 23Na T1 relaxation rates, and a shift to more positive resonance frequencies. Larger changes are observed for the hectorite-HA composite than for the base clay. In light of recently reported MD simulations of other polymer-Na-smectite composites, we interpret the observed changes as an increase in the rate of Na+ site hopping in the presence of supercritical CO2, the presence of potential new Na+ sorption sites when the humic acid is present, and perhaps an accompanying increase in the number of Na+ ions actively involved in site hopping. The results suggest that the presence of organic material either in clay interlayers or on external particle surfaces can significantly affect the behavior of supercritical CO2 and the mobility of metal ions in reservoir rocks.

  12. Decay Properties of 266Bh and 262Db Produced in the 248Cm+23Na Reaction - Further Confirmation of the 278113 Decay Chain

    Decay properties of an isotope 266Bh and its daughter nucleus 262Db produced by the 248Cm(23Na,5n) reaction were studied by using a gas-filled recoil separator coupled with a position-sensitive semiconductor detector. 266Bh was clearly identified from the correlation of the known nuclide, 262Db. The obtained decay properties of 266Bh and 262Db are consistent with those observed in the 278113 chain by RIKEN collaboration, which provided further confirmation of the discovery of 278113.

  13. Strengths of the resonances at 436, 479, 639, 661, and 1279 keV in the $^{22}$Ne(p,$\\gamma$)$^{23}$Na reaction

    Depalo, Rosanna; Ferraro, Federico; Slemer, Alessandra; Al-Abdullah, Tariq; Akhmadaliev, Shavkat; Anders, Michael; Bemmerer, Daniel; Elekes, Zoltán; Mattei, Giovanni; Reinicke, Stefan; Schmidt, Konrad; Scian, Carlo; Wagner, Louis

    2015-01-01

    The $^{22}$Ne(p,$\\gamma$)$^{23}$Na reaction is included in the neon-sodium cycle of hydrogen burning. A number of narrow resonances in the Gamow window dominates the thermonuclear reaction rate. Several resonance strengths are only poorly known. As a result, the $^{22}$Ne(p,$\\gamma$)$^{23}$Na thermonuclear reaction rate is the most uncertain rate of the cycle. Here, a new experimental study of the strengths of the resonances at 436, 479, 639, 661, and 1279 keV proton beam energy is reported. The data have been obtained using a tantalum target implanted with $^{22}$Ne. The strengths $\\omega\\gamma$ of the resonances at 436, 639, and 661 keV have been determined with a relative approach, using the 479 and 1279 keV resonances for normalization. Subsequently, the ratio of resonance strengths of the 479 and 1279 keV resonances was determined, improving the precision of these two standards. The new data are consistent with, but more precise than, the literature with the exception of the resonance at 661 keV, which i...

  14. Development of a magnetic resonance sensor for on-line monitoring of 99Tc and 23Na in tank waste cleanup processes: Final report and implementation plan

    In response to US Department of Energy (DOE) requirements for advanced cross-cutting technologies, Argonne National Laboratory is developing an on-line sensor system for the real-time monitoring of 99Tc and 23Na in various locations throughout radioactive-waste processing facilities. Based on nuclear magnetic resonance spectroscopy, the highly automated sensor system can provide near-real-time response with minimal sampling. The technology, in the form of a flow-through nuclear-magnetic-resonance-based on-line process sensing and control system, can rapidly monitor 99Tc speciation and concentration (from 0.1 molar to 10 micro molar) in the feedstocks and eluents of radioactive-waste treatment processes. The system is nonintrusive, capable of withstanding harsh plant environments, and reasonably immune to contaminants. Furthermore, the system is capable of operating over large variations in pH, conductivity, and salinity. This document describes design parameters, results from sensitivity studies, and initial results obtained from oxidation-reduction studies that were conducted on technetium standards and waste specimens obtained from DOE's Hanford site. A cursory investigation of the system's capabilities to monitor 23Na at high concentrations are also reported, as are descriptions of site requirements, implementation recommendations, and testing techniques

  15. Measurement of thermal neutron distribution from a medical cyclotron using auto radiography with 23Na activation detector and medical imaging plate

    When the generated activity of 18F was 100 GBq, about 1015 neutrons are emitted by the nuclear reaction in target of the medical cyclotron. These neutrons induce activity in the cyclotron and the indoor concrete of the cyclotron room, and will contribute to the exposure of the staff maintaining the cyclotron. This paper describes the basic characteristics of the thermal neutron measurement method of 23Na activation detector by auto radiography (ARG) using the medical imaging plate (IP). Simple linear regression lines were able to describe the relationship between the scanner unit and the activity of 24Na. The optimal S value and exposure time of ARG method was found to be 1,000 and 24 hours. This method that uses the salt instead of gold foil allows hospitals to measure the thermal neutron fluencies easily at many locations for the radiation safety management of routine work and the decommissioning of the cyclotron facility. (author)

  16. 1H and 23Na MAS NMR spectroscopy of cationic species in CO2 selective alkaline earth metal porous silicoaluminophosphates prepared via liquid and solid state ion exchange

    Arévalo-Hidalgo, Ana G.; Dugar, Sneha; Fu, Riqiang; Hernández-Maldonado, Arturo J.

    2012-07-01

    The location of extraframework cations in Sr2+ and Ba2+ ion-exchanged SAPO-34 was estimated by means of 1H and 23Na MAS NMR spectroscopy and spectral deconvolution. Incorporation of the alkaline earth metal cations onto the SAPO framework was achieved via liquid state ion exchange, coupled partial detemplation/solid-state ion exchange, and combination of both techniques. MAS NMR revealed that the level of ion exchange was limited by the presence of protons and sodium cations near hexagonal prisms (site SI), which are relatively difficult to exchange with the alkaline earth metal due to steric and charge repulsion criteria. In addition, the presence of ammonium cations in the supercages facilitated the exchange of otherwise tenacious hydrogen as corroborated by unit cell compositional data as well as enhanced CO2 adsorption at low partial pressures. The extraframework ammonium species were produced from partial detemplation of the structure-directing agent employed for the SAPO-34 synthesis, tetraethylammonium.

  17. Investigating the astrophysical 22Ne(p, γ23Na and 22Mg(p, γ23Al reactions with a multi-channel scattering formalism

    Fraser P. R.

    2014-03-01

    Full Text Available The reaction 22Ne(p, γ23Na is key to the NeNa cycle of stellar nucleogenesis, and better understanding of the 22Mg(p, γ23Al reaction is needed to understand the 22Na puzzle in ONe white dwarf novae. We aim to study these reactions using a multi-channel algebraic scattering (MCAS formalism for low-energy nucleon-nucleus scattering, recently expanded to investigate radiative capture. As a first step towards this goal, we here calculate the energy levels of the mass-23 (Ne, Mg, Na, Al nuclei. This is not only because the resonant structure of these nuclei are related to the astrophysical -rates of interest, but also because the interaction parameters determined for describing the energy levels are an integral part of the future calculation of the astrophysical reactions when using the MCAS scheme.

  18. Investigating the astrophysical 22Ne(p,γ)23Na and 22Mg(p,γ)23Al reactions with a multi-channel scattering formalism

    The reaction 22Ne(p,γ)23Na is key to the NeNa cycle of stellar nucleogenesis, and a better understanding of the 22Mg(p,γ)23Al reaction is needed to understand the 22Na puzzle in ONe white dwarf novae. We aim at studying these reactions using a multi-channel algebraic scattering (MCAS) formalism for low-energy nucleon-nucleus scattering, recently expanded to investigate radiative capture. As a first step towards this goal, we here calculate the energy levels of the mass-23 (Ne, Mg, Na, Al) nuclei. This is not only because the resonant structure of these nuclei are related to the astrophysical γ-rates of interest, but also because the interaction parameters determined for describing the energy levels are an integral part of the future calculation of the astrophysical reactions when using the MCAS scheme. (authors)

  19. 1H and 23Na MAS NMR spectroscopy of cationic species in CO2 selective alkaline earth metal porous silicoaluminophosphates prepared via liquid and solid state ion exchange

    The location of extraframework cations in Sr2+ and Ba2+ ion-exchanged SAPO-34 was estimated by means of 1H and 23Na MAS NMR spectroscopy and spectral deconvolution. Incorporation of the alkaline earth metal cations onto the SAPO framework was achieved via liquid state ion exchange, coupled partial detemplation/solid-state ion exchange, and combination of both techniques. MAS NMR revealed that the level of ion exchange was limited by the presence of protons and sodium cations near hexagonal prisms (site SI), which are relatively difficult to exchange with the alkaline earth metal due to steric and charge repulsion criteria. In addition, the presence of ammonium cations in the supercages facilitated the exchange of otherwise tenacious hydrogen as corroborated by unit cell compositional data as well as enhanced CO2 adsorption at low partial pressures. The extraframework ammonium species were produced from partial detemplation of the structure-directing agent employed for the SAPO-34 synthesis, tetraethylammonium. - Graphical abstract: MAS NMR was used to elucidate the position the cationic species in alkaline earth metal exchanged silicoaluminophosphates. These species played a significant role during the ion exchange process and, therefore, the materials ultimate CO2 adsorption performance. Highlights: ► Location of extraframework Sr2+ or Ba2+ cations was estimated by means of 1H and 23Na MAS NMR. ► Level of Sr2+ or Ba2+ ion exchange was limited by the presence of protons and sodium cations. ► Presence of ammonium cations in the supercages facilitated the exchange. ► Sr2+ and Ba2+ ion exchanged SAPOs are outstanding CO2 adsorbents.

  20. Výběr vhodné formy financování developerských projektů

    Podhorná, Hana

    2012-01-01

    Cílem diplomové práce je výběr vhodné varianty financování developerského projektu. Práce je rozdělena na teoreticko - metodologickou a praktickou část. Teoreticko - metodologická část se zaměřuje na problematiku strukturování developerských projektů a jejich formy financování, včetně hlavních produktů a postupů. Praktická část je postavena na komparaci variant financování daného projektu. Autor se zde pokusil analyzovat finanční strukturu projektu, následně aplikoval finanční instrumenty pro...

  1. Estimation of multi-group cross section covariances for 235,238U, 239Pu, 241Am, 56Fe, 23Na and 27Al

    This paper presents the methodology used to estimate multi-group covariances for some major isotopes used in reactor physics. The starting point of this evaluation is the modelling of the neutron induced reactions based on nuclear reaction models with parameters. These latest are the vectors of uncertainties as they are absorbing uncertainties and correlation arising from the confrontation of nuclear reaction model to microscopic experiment. These uncertainties are then propagated towards multi-group cross sections. As major breakthroughs were then asked by nuclear reactor physicists to assess proper uncertainties to be used in applications, a solution is proposed by the use of integral experiment information at two different stages in the covariance estimation. In this paper, we will explain briefly the treatment of all type of uncertainties, including experimental ones (statistical and systematic) as well as those coming from validation of nuclear data on dedicated integral experiment (nuclear data oriented). We will illustrate the use of this methodology with various isotopes such as 235,238U, 239Pu, 241Am, 56Fe, 23Na and 27Al. (authors)

  2. Study of the 23Na EFG (Electrostatic Field Gradient) tensor on single crystals of Na2S.9H2O by wideline NMR

    The quadrupole coupling constant |e2qQ/n| if 23Na has been determined by measuring single crystals of Na2S.9H2O at room temperature. A value of 687.5 +- 1.2 kHz was found. The asymmetry parameter eta = (qsub(x'x') - qsub(y'y')) / qsub(z'z') of the efg-tensor is zero, there is axial symmetry. The principle axis of the efg-tensor runs parallel to the main crystallographic axis c, the value of the main component of the efg-tensor in c-direction is 171.875 +- 0.6 kHz. The longitudinal relaxation time T1 has been evaluated as 1.8 s. On this account, the mean distance between two Na-atoms has been determined by measuring the splitting of the central line due to dipole-dipole interaction. The Na-Na distance was found with 0.36 +- 0.007 nm. This value is in good agreement with results from neutron diffraction studies. It was not possible to determine direction and length of hydrogen bonds by NMR-results. A method of growing single crystals of Na2S.9H2O of demanded size and purity has been described. Constructional details and technical data of a self-made wideline-NMR-spectrometer are added in an appendix. (Author)

  3. Definice a formy eutanazie

    Hříbek, Tomáš

    Praha: Academia, 2015, s. 3-8. (Strategie AV21) Institutional support: RVO:67985955 Keywords : euthanasia * argument from autonomy * argument from compassion * slippery-slope argument Subject RIV: AA - Philosophy ; Religion

  4. Niestandardowe formy komunikacji marketingowej

    Pilarczyk, Bogna

    2004-01-01

    The changes taking place in the market environment encourage the usage of, apart from traditional promotion tools, non-standard forms of marketing communications. Among the stimuli to the development of new forms of communications one should particularly emphasize the excessive saturation with classical ways of communications, rapid development of information technology, the restrictions on companies' promotion expenditures, the increase in advertisers' creativity and demand for more customiz...

  5. Darwinismus a formy kreacionismu

    Hříbek, Tomáš

    Praha: Filosofia, 2011, s. 21-73. ISBN 978-80-7007-358-2 R&D Projects: GA ČR(CZ) GA401/08/0904 Institutional research plan: CEZ:AV0Z90090514 Keywords : Darwinism * theory of evolution * creationism * intelligent plan * Catholic theology * naturalism Subject RIV: AA - Philosophy ; Religion

  6. Prezentacja sprawozdań finansowychw formie elektronicznej przez największe jednostki gospodarcze w Polsce w kontekście oczekiwań interesariuszy

    Jan Michalak

    2010-12-01

    oczekiwań interesariuszy dotyczących zawartości i formy sprawozdań finansowych w wersji elektronicz-nej. W części drugiej zostały przeanalizowane trendy w rozwoju elektronicznej komunikacji z interesariuszami. W części trzeciej zaprezentowano metodykę i wyniki badań empirycznych prowadzonych przez autora. Badania literaturowe i empiryczne autora wskazują na istnienie istotnej luki między oczekiwaniami interesariuszy a praktyką prezentacji sprawozdań finanso-wych w formie elektronicznej przez jednostki gospodarcze. Możliwości zwiększenia użyteczności sprawozdań finansowych w formie elektronicznej nie są wykorzystane ze względu na zachowawcze podejście jednostek sporządzających sprawozdania finansowe. Podejście to polega na prostym odwzorowaniu wersji papierowej w wersji elektronicznej sprawozdania.

  7. A new study of the {sup 22}Ne(p, γ){sup 23}Na reaction deep underground: Feasibility, setup and first observation of the 186 keV resonance

    Cavanna, F.; Corvisiero, P.; Ferraro, F.; Prati, P. [Universita di Genova, Dipartimento di Fisica, Genova (Italy); INFN, Sezione di Genova (Italy); Depalo, R. [INFN, Sezione di Padova, Padova (Italy); Universita di Padova, Dipartimento di Fisica e Astronomia, Padova (Italy); Menzel, M.L.; Anders, M. [Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden (Germany); Technische Universitaet Dresden, Dresden (Germany); Aliotta, M.; Bruno, C.G.; Davinson, T.; Scott, D.A. [University of Edinburgh, SUPA, School of Physics and Astronomy, Edinburgh (United Kingdom); Bemmerer, D.; Szuecs, T. [Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden (Germany); Broggini, C.; Menegazzo, R.; Rossi Alvarez, C. [INFN, Sezione di Padova, Padova (Italy); Caciolli, A. [INFN, Sezione di Padova, Padova (Italy); Universita di Padova, Dipartimento di Fisica e Astronomia, Padova (Italy); Di Leva, A.; Imbriani, G. [Universita degli Studi di Napoli Federico II, Dipartimento di Fisica, Napoli (Italy); INFN, Sezione di Napoli (Italy); Elekes, Z.; Fueloep, Z.; Gyuerky, G.; Somorjai, E. [Institute of Nuclear Research of the Hungarian Academy of Sciences (MTA ATOMKI), Debrecen (Hungary); Formicola, A.; Junker, M. [INFN, Laboratori Nazionali del Gran Sasso, Assergi (Italy); Gervino, G. [Universita di Torino, Dipartimento di Fisica Sperimentale, Torino (Italy); INFN, Sezione di Torino (Italy); Guglielmetti, A.; Trezzi, D. [Universita degli Studi di Milano, and INFN, Sezione di Milano, Milano (Italy); Gustavino, C. [INFN, Sezione di Roma ' ' La Sapienza' ' , Roma (Italy); Straniero, O. [Osservatorio Astronomico di Collurania, Teramo (Italy); Ruhr-Universitaet Bochum, Bochum (Germany); Strieder, F. [Ruhr-Universitaet Bochum, Bochum (Germany); Collaboration: LUNA Collaboration

    2014-11-15

    The {sup 22}Ne(p,γ){sup 23}Na reaction takes part in the neon-sodium cycle of hydrogen burning. This cycle is active in asymptotic giant branch stars as well as in novae and contributes to the nucleosythesis of neon and sodium isotopes. In order to reduce the uncertainties in the predicted nucleosynthesis yields, new experimental efforts to measure the {sup 22}Ne(p,γ){sup 23}Na cross section directly at the astrophysically relevant energies are needed. In the present work, a feasibility study for a {sup 22}Ne(p,γ){sup 23}Na experiment at the Laboratory for Underground Nuclear Astrophysics (LUNA) 400 kV accelerator deep underground in the Gran Sasso laboratory, Italy, is reported. The ion-beam-induced γ-ray background has been studied. The feasibility study led to the first observation of the E{sub p}=186 keV resonance in a direct experiment. An experimental lower limit of 0.12 x 10{sup -6} eV has been obtained for the resonance strength. Informed by the feasibility study, a dedicated experimental setup for the {sup 22}Ne(p,γ){sup 23}Na experiment has been developed. The new setup has been characterized by a study of the temperature and pressure profiles. The beam heating effect that reduces the effective neon gas density due to the heating by the incident proton beam has been studied using the resonance scan technique, and the size of this effect has been determined for a neon gas target. (orig.)

  8. Application of 1H and 23Na magic angle spinning NMR spectroscopy to define the HRBC up-taking of MRI contrast agents

    Calabi, Luisella; Paleari, Lino; Biondi, Luca; Linati, Laura; De Miranda, Mario; Ghelli, Stefano

    2003-09-01

    The up-take of Gd(III) complexes of BOPTA, DTPA, DOTA, EDTP, HPDO3A, and DOTP in HRBC has been evaluated by measuring the lanthanide induced shift (LIS) produced by the corresponding dysprosium complexes (DC) on the MAS-NMR resonances of water protons and free sodium ions. These complexes are important in their use as MRI contrast agents (MRI-CA) in diagnostics. 1H and 23Na MAS-NMR spectra of HRBC suspension, collected at 9.395 T, show only one signal due to extra- and intra-cellular water (or sodium). In MAS spectra, the presence of DC in a cellular compartment produces the LIS of only the nuclei (water proton or sodium) in that cellular compartment and this LIS can be related to the DC concentrations (by the experimental curves of LIS vs. DC concentrations) collected in the physiological solution. To obtain correct results about LIS, the use of MAS technique is mandatory, because it guarantees the only the nuclei staying in the same cellular compartment where the LC is present show the LIS. In all the cases considered, the addition of the DC to HRBC (100% hematocrit) produced a shift of only the extra-cellular water (or sodium) signal and the gradient of concentration ( GC) between extra- and intra-cellular compartments resulted greater than 100:1, when calculated by means of sodium signals. These high values of GC are direct proofs that none of the tested dysprosium complexes crosses the HRBC membrane. Since the DC are iso-structural to the gadolinium complexes the corresponding gadolinium ones (MRI-CA) do not cross the HRBC membrane and, consequently, they are not up-taken in HRBC. The GC values calculated by means of water proton signals resulted much lower than those obtained by sodium signals. This proves that the choice of the isotope is a crucial step in order to use this method in the best way. In fact, GC value depends on the lowest detectable LIS which, in turn, depends on the nature of the LC (lanthanide complex) and the observed isotopes.

  9. Vliv filtrů na plnění formy při odlévání slitin hliníku

    Makalouš, Jakub

    2008-01-01

    Tato studie se zabývá vlivem filtrů na plnění formy při odlévání slitin hliníku. Hlavním cílem práce bylo popsat hydraulické odpory různých druhů filtrů a průběh zanášení vměstky. V teoretické části popisuje problematiku filtrace obecně, specifika filtrace hliníkových slitin a také hlavní charakteristiky vměstků vyskytující se v hliníkových slitinách. Experimentální část se zabývá prolévacími zkouškami filtrů, vlivem filtrů na naplynění taveniny a metalografickým rozborem. Bylo zjištěno, že n...

  10. Development of a magnetic resonance sensor for on-line monitoring of {sup 99}Tc and {sup 23}Na in tank waste cleanup processes: Final report and implementation plan

    Dieckman, S. L.; Jendrzejczyk, J. A.; Raptis, A. C.

    2000-02-24

    In response to US Department of Energy (DOE) requirements for advanced cross-cutting technologies, Argonne National Laboratory is developing an on-line sensor system for the real-time monitoring of {sup 99}Tc and {sup 23}Na in various locations throughout radioactive-waste processing facilities. Based on nuclear magnetic resonance spectroscopy, the highly automated sensor system can provide near-real-time response with minimal sampling. The technology, in the form of a flow-through nuclear-magnetic-resonance-based on-line process sensing and control system, can rapidly monitor {sup 99}Tc speciation and concentration (from 0.1 molar to 10 micro molar) in the feedstocks and eluents of radioactive-waste treatment processes. The system is nonintrusive, capable of withstanding harsh plant environments, and reasonably immune to contaminants. Furthermore, the system is capable of operating over large variations in pH, conductivity, and salinity. This document describes design parameters, results from sensitivity studies, and initial results obtained from oxidation-reduction studies that were conducted on technetium standards and waste specimens obtained from DOE's Hanford site. A cursory investigation of the system's capabilities to monitor {sup 23}Na at high concentrations are also reported, as are descriptions of site requirements, implementation recommendations, and testing techniques.

  11. FORMY NAUCZANIA POPRZEZ GRę W KSZTAłTOWANIU KOMPETENCJI EKONOMICZNEJ PRZYSZłYCH MENEDżERóW OśWIATY: „KROK PO KROKU RAZEM DO SUKCESU!”

    Burłajenko, T.

    2015-01-01

    Prezentujemy wypracowania optymalnego programu „Krоk po kroku razem dо sukcesu!” z użyciem nauki w formie gry przy kształtowaniu kompetencji ekonomicznej przyszłych menedżerów oświaty, w którym przyszli zawodowcy mogą zdobyć doświadczenia w komunikacji, aktywnej współpracy, umiejętność mówienia krótko i konstruktywnie, oceniać siebie i innych, zrozumieć innychWe present an optimal program using the game in training education managers of education which reflects process of formation of economi...

  12. {sup 1}H and {sup 23}Na MAS NMR spectroscopy of cationic species in CO{sub 2} selective alkaline earth metal porous silicoaluminophosphates prepared via liquid and solid state ion exchange

    Arevalo-Hidalgo, Ana G. [Department of Chemical Engineering, University of Puerto Rico-Mayagueez Campus, Mayagueez, PR 00681-9000 (Puerto Rico); Dugar, Sneha; Fu, Riqiang [National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310 (United States); Hernandez-Maldonado, Arturo J., E-mail: arturoj.hernandez@upr.edu [Department of Chemical Engineering, University of Puerto Rico-Mayagueez Campus, Mayagueez, PR 00681-9000 (Puerto Rico)

    2012-07-15

    The location of extraframework cations in Sr{sup 2+} and Ba{sup 2+} ion-exchanged SAPO-34 was estimated by means of {sup 1}H and {sup 23}Na MAS NMR spectroscopy and spectral deconvolution. Incorporation of the alkaline earth metal cations onto the SAPO framework was achieved via liquid state ion exchange, coupled partial detemplation/solid-state ion exchange, and combination of both techniques. MAS NMR revealed that the level of ion exchange was limited by the presence of protons and sodium cations near hexagonal prisms (site SI), which are relatively difficult to exchange with the alkaline earth metal due to steric and charge repulsion criteria. In addition, the presence of ammonium cations in the supercages facilitated the exchange of otherwise tenacious hydrogen as corroborated by unit cell compositional data as well as enhanced CO{sub 2} adsorption at low partial pressures. The extraframework ammonium species were produced from partial detemplation of the structure-directing agent employed for the SAPO-34 synthesis, tetraethylammonium. - Graphical abstract: MAS NMR was used to elucidate the position the cationic species in alkaline earth metal exchanged silicoaluminophosphates. These species played a significant role during the ion exchange process and, therefore, the materials ultimate CO{sub 2} adsorption performance. Highlights: Black-Right-Pointing-Pointer Location of extraframework Sr{sup 2+} or Ba{sup 2+} cations was estimated by means of {sup 1}H and {sup 23}Na MAS NMR. Black-Right-Pointing-Pointer Level of Sr{sup 2+} or Ba{sup 2+} ion exchange was limited by the presence of protons and sodium cations. Black-Right-Pointing-Pointer Presence of ammonium cations in the supercages facilitated the exchange. Black-Right-Pointing-Pointer Sr{sup 2+} and Ba{sup 2+} ion exchanged SAPOs are outstanding CO{sub 2} adsorbents.

  13. Elektronické formy marketingu

    Habart, Lukáš

    2009-01-01

    Obsahem této bakalářské práce je analýza marketingu společnosti. Ve své práci se budu zabývat, zda společnost dostatečně využívá zejména elektronického marketingu, shrnu nejvýznamnější druhy elektronického marketingu, jeho trendy a vyberu pro společnost nejlépe vyhovující.

  14. Nové formy marketingu

    Khalilova, Nazila

    2008-01-01

    The bachelor thesis "New trends in marketing communication" focuses on the new methods in a communication mix, such as guerilla, buzz, mobile, direct and event marketing, and product placement. The primary goal of the thesis is to define these tools and show the importance of implementing these methods in a globalised world. Samples of implementations of these new tools are shown on both, the Azerbaijanian and world market, in the practical part of the thesis. Also, Azerbaijanian market is sh...

  15. Daňová optimalizace při změně právní formy podnikání z fyzické osoby na společnost s ručením omezeným

    Němcová, Hana

    2015-01-01

    Diplomová práce se zabývá analýzou změny právní formy podnikání z fyzické osoby na právnickou, konkrétně na společnost s ručením omezeným. Práce je zaměřená na způsob zdanění fyzických a právnických osob, na jednotlivé možnosti přechodu mezi těmito právními formami a zhodnocení záporů a kladů jednotlivých forem podnikání. Cílem práce je sdělit podnikateli výhody a nevýhody zdanění jednotlivých forem podnikání, navrhnout podnikateli změnu právní formy a seznámit ho s jednotlivými kroky, které ...

  16. {sup 23}Na and {sup 87}Rb relaxation study of the structural phase transitions in the Tutton salts Na{sub 2}Zn(SO{sub 4}){sub 2}.6H{sub 2}O and Rb{sub 2}Zn(SO{sub 4}){sub 2}.6H{sub 2}O single crystals

    Lim, Ae Ran; Lee, Ju Ha [Department of Science Education, Jeonju University (Korea)

    2010-05-15

    The NMR spectrum, spin-lattice relaxation times, T{sub 1}, and the spin-spin relaxation times, T{sub 2}, for the {sup 23}Na and {sup 87}Rb nuclei in Tutton salts Na{sub 2}Zn(SO{sub 4}){sub 2}.6H{sub 2}O and Rb{sub 2}Zn(SO{sub 4}){sub 2}.6H{sub 2}O single crystals were determined by using an FT NMR spectrometer. The NMR spectrum and relaxation times for the {sup 23}Na and {sup 87}Rb nuclei in two crystals undergo significant changes near T{sub C}. These changes close to T{sub C} were the only detectable result of the structural transformation; the change is due to the fact that the electric field gradient value becomes 0. Especially, T{sub 1} and T{sub 2} for {sup 87}Rb in the Rb{sub 2}Zn(SO{sub 4}){sub 2}.6H{sub 2}O crystals at high temperature have similar values on the order of milliseconds, which is indicative of a liquid-like system. The motion giving rise to this liquid-like behavior is probably related to superionic motion at high temperature. (Abstract Copyright [2010], Wiley Periodicals, Inc.)

  17. Akademickie i pozaakademickie formy edukacji w marketingu

    Chapman, David; Kozielski, Robert

    2004-01-01

    This article is a missionary tract arguing for marketing education as a fundamental requirement for a successful marketing career. Marketing can be defined as a process for understanding markets, for quantifying present and forecasting future value required by different customer groups, ensuring the sourcing of identified demand, ensuring effective communication between market constituents and for measuring the effectiveness of the value delivered. This is not just common sense, it is require...

  18. Mudrosloví: jeho formy a funkce

    Vítek, Tomáš

    Praha: Herrmann & synové, 2009, s. 8-27. (Svět archaických kultur). ISBN 978-80-87054-17-8 R&D Projects: GA ČR(CZ) GA401/08/0436 Institutional research plan: CEZ:AV0Z90090514 Keywords : the wisdom literature * Archaic Greece Subject RIV: AA - Philosophy ; Religion

  19. FORMY DYSKRYMINACJI KOBIET NA POLSKIM RYNKU PRACY

    Kalinowska-Nawrotek, Barbara

    2004-01-01

    The subject of this paper is the analysis of gender inequalities in the professional sphere on the Polish labour markets from 1992 till 2003. In the beginning the definition and the forms of discrimination against women on the labour market were presented. Next the trial of the identification and the materialization of discrimination of women on the Polish labour market was raised on the basis of statistical data (GUS, Eurostat) and the results of public survey (bulletins of CB...

  20. The brute-force polarization of 23Na and the 23Na(n,γ)24Na reaction

    A Na target has been polarized by brute force to 22% and the γ radiation produced by polarized thermal neutron capture has been investigated. The 2+ channel spin contribution has been determined model independently and unambiguously for 22 primary transitions. The average 2+ channel contribution is 5.8(5)%. Spins of final levels are in agreement with previous assignments. For three levels spin restrictions have been made. The energies of positive parity levels are in agreement with a shell model calculation in the complete sd shell. (Auth.)

  1. Formy a způsoby psychologické pomoci

    TRNKOVÁ, Vendula

    2011-01-01

    Aim of this thesis, called ?Forms and methods psychological help?, the theory defined psychological help as a potential tool of knowledge, as well as finding ways to himself. Key issues are the development stages and related crises, the crisis of mental and psychological support, psychotherapy, helping profession. Examines the practical interest in psychological help, the specific reasons and criteria that are decisive for the choice of this sort of help. It also investigates specific forms, ...

  2. Kategorie Formy v díle Witolda Gombrowicze

    Olšovský, Miroslav

    2011-01-01

    Roč. 80, č. 1 (2011), s. 60-68. ISSN 0037-6736 Institutional research plan: CEZ:AV0Z90920516 Keywords : Phenomenolgy * Narration * Polish modernism Subject RIV: AJ - Letters, Mass-media, Audiovision

  3. Formy motivace a stimulace ve vybraném podniku

    DOLNÁ, Kateřina

    2013-01-01

    Currently, human resource management is one of the most important system operations of specific companies. Due to the growing effort to achieve higher competitiveness, companies are looking for new resources, namely human ones, and the importance of human capital within the global society is on the rise. The dynamic management approach involving motivational approaches strenghtens the unique role of information technology and, along with the improved quality of staff, increases general awaren...

  4. Modernizem in njegove poteze v lirski, narativni in dramski formi

    Škulj, Jola

    2015-01-01

    Modernist features in lyrical, narrative and dramatic form. - The crisis of consciousness as the background of establishing modernist literary phenomena enables the approach to the features of the lyrical, narrative and dramatic genres and their basic logic of inconclusiveness through Husserlian comments on the issue. Following his views on the problem going back to the turn of thecentury, the discussion of the complex and contradictory reality in modernist forms and of their fundamental stra...

  5. 2D 23Na-23Na DQ/MAS NMR spectroscopy: interface induced clustering and immobilization of sodium ions in nanostructured aluminosilicates

    Kobera, Libor; Urbanová, Martina; Brus, Jiří

    International Society of Magnetic Resonance, 2015. P 112. [Alpine Conference on Solid-State NMR /9./. 13.09.2015-17.09.2015, Chamonix Mont-Blanc] R&D Projects: GA ČR(CZ) GA13-24155S Institutional support: RVO:61389013 Keywords : MAS NMR * geopolymers * zeolites Subject RIV: JN - Civil Engineering

  6. Sodium 3D COncentration MApping (COMA 3D) Using 23Na and Proton MRI

    Truong, Milton L.; Harrington, Michael G.; Schepkin, Victor D.; Chekmenev, Eduard Y.

    2014-01-01

    Functional changes of sodium 3D MRI signals were converted into millimolar concentration changes using an open-source fully automated MATLAB toolbox. These concentration changes are visualized via 3D sodium concentration maps, and they are overlaid over conventional 3D proton images to provide high-resolution co-registration for easy correlation of functional changes to anatomical regions. Nearly 5000/hour concentration maps were generated on a personal computer (ca. 2012) using 21.1 T 3D sodium MRI brain images of live rats with spatial resolution of 0.8×0.8×0.8 mm3 and imaging matrices of 60×60×60. The produced concentration maps allowed for non-invasive quantitative measurement of in vivo sodium concentration in the normal rat brain as a functional response to migraine-like conditions. The presented work can also be applied to sodium-associated changes in migraine, cancer, and other metabolic abnormalities that can be sensed by molecular imaging. The MATLAB toolbox allows for automated image analysis of the 3D images acquired on the Bruker platform and can be extended to other imaging platforms. The resulting images are presented in a form of series of 2D slices in all three dimensions in native MATLAB and PDF formats. The following is provided: (a) MATLAB source code for image processing, (b) the detailed processing procedures, (c) description of the code and all sub-routines, (d) example data sets of initial and processed data. The toolbox can be downloaded at: http://www.vuiis.vanderbilt.edu/~truongm/COMA3D/ PMID:25261742

  7. Second-Scale Nuclear Spin Coherence Time of Trapped Ultracold $^{23}$Na$^{40}$K Molecules

    Park, Jee Woo; Loh, Huanqian; Will, Sebastian A; Zwierlein, Martin W

    2016-01-01

    Coherence, the stability of the relative phase between quantum states, lies at the heart of quantum mechanics. Applications such as precision measurement, interferometry, and quantum computation are enabled by physical systems that have quantum states with robust coherence. With the creation of molecular ensembles at sub-$\\mu$K temperatures, diatomic molecules have become a novel system under full quantum control. Here, we report on the observation of stable coherence between a pair of nuclear spin states of ultracold fermionic NaK molecules in the singlet rovibrational ground state. Employing microwave fields, we perform Ramsey spectroscopy and observe coherence times on the scale of one second. This work opens the door for the exploration of single molecules as a versatile quantum memory. Switchable long-range interactions between dipolar molecules can further enable two-qubit gates, allowing quantum storage and processing in the same physical system. Within the observed coherence time, $10^4$ one- and two-...

  8. Time-efficient interleaved human (23)Na and (1)H data acquisition at 7 T.

    de Bruin, Paul W; Koken, Peter; Versluis, Maarten J; Aussenhofer, Sebastian A; Meulenbelt, Ingrid; Börnert, Peter; Webb, Andrew G

    2015-10-01

    The aim of this study was to implement and evaluate a flexible and time-efficient interleaved imaging approach for the acquisition of proton and sodium images of the human knee at 7 T within a clinically relevant timescale. A flexible software framework was established which allowed the interleaving of multiple, different, fully specific absorption ratio (SAR)-validated scans. The system was able to switch between these different scans at flexible time points. The practical example presented consists of interleaved proton (Dixon imaging and T2* mapping) and sodium (mapping the sodium content and fluid-suppressed component separately) sequences with the key idea to perform proton MRI whilst the sodium nuclei relax towards thermal equilibrium, and vice versa. Comparisons were made between these four scans being acquired sequentially in the normal mode of scanner operation and those acquired in an interleaved fashion. Images acquired in the interleaved mode were very similar to those acquired in sequential scans with no image artifacts produced by the slight intra-sequence variation in steady-state magnetization. A reduction in scanning time of almost a factor of two was established using the interleaved scans, allowing such a protocol to be completed within 30 min. Phantom experiments and in vivo scans performed in healthy volunteers and in one patient proved the basic feasibility of this approach. This approach for the interleaving of multiple proton and sodium scans, each with different contrasts, is an efficient method for the design of new practical clinical protocols for sodium MRI. PMID:26269329

  9. Characterization of 22Ne implanted target by 22Ne(p,γ)23Na resonance reaction

    Studies of nuclear reactions relevant to astrophysical scenario, often require measurement of cross section in picobarn to nano-barn range (1 barn = 10−24 cm2). So we need targets which are isotopically pure and can withstand high beam load over a long time. Even the backings used should contain no or very low concentration of impurities. Implantation technique has been found to be one of the most effective methods to produce such targets

  10. Interface induced growth and transformation of polymer-conjugated proto-crystalline phases in aluminosilicate hybrids: a multiple-quantum 23Na-23Na MAS NMR correlation spectroscopy study

    Brus, Jiří; Kobera, Libor; Urbanová, Martina; Doušová, B.; Lhotka, M.; Koloušek, D.; Kotek, Jiří; Čuba, P.; Czernek, Jiří; Dědeček, Jiří

    2016-01-01

    Roč. 32, č. 11 (2016), s. 2787-2797. ISSN 0743-7463 R&D Projects: GA ČR(CZ) GA13-24155S; GA MŠk(CZ) LD14010; GA MŠk(CZ) LO1507 Grant ostatní: European Commission(XE) COST Action MP1202 HINT Institutional support: RVO:61389013 ; RVO:61388955 Keywords : aluminosilicate hybrids * hybrid geopolymers * interface Subject RIV: CD - Macromolecular Chemistry; CF - Physical ; Theoretical Chemistry (UFCH-W) Impact factor: 4.457, year: 2014

  11. Low-energy resonances in the 22Ne(p,γ23Na reaction directly observed at LUNA

    Cavanna Francesca

    2015-01-01

    A study of this reaction has been carried out at the Laboratory for Underground Nuclear Astrophysics (LUNA, in the Gran Sasso National Laboratory, using a windowless gas target and two high-purity germanium detectors. Several resonances have been observed for the first time in a direct experiment.

  12. Vitamin D improves viral response in hepatitis C genotype 2-3 na(i)ve patients

    Assy Nimer; Abu Mouch

    2012-01-01

    AIM:To examine whether vitamin D improved viral response and predicted treatment outcome in patients with hepatitis C virus (HCV) genotype 2-3.METttODS:Fifty patients with chronic HCV genotype 2-3 were randomized consecutively into two groups:Treatment group [20 subjects,age 48 ± 14 years,body mass index (BMI) 30 ± 6,65% male],who received 180 μg pegylated α-interferon-2a plus oral ribavirin 800 mg/d (Peg/RBV),together with oral vitamin D3 (Vitamidyne D drops; 2000 IU/d,10 drops/d,normal serum level > 32 ng/mL) for 24 wk; and control group (30 subjects,age 45 ± 10 years,BMI 26 ± 3,60% male),who received identical therapy without vitamin D.HCV RNA was assessed by reverse transcription polymerase chain reaction.Undetectable HCV RNA at 4,12 and 24 wk after treatment was considered as rapid virological response,complete early virological response,and sustained virological response (SVR),respectively.Biomarkers of inflammation were measured.RESULTS:The treatment group with vitamin D had higher BMI (30±6 vs 26 ± 3,P < 0.02),and high viral load (> 400 000 IU/mL,65% vs 40%,P < 0.01)than controls.Ninety-five percent of treated patients were HCV RNA negative at week 4 and 12.At 24 wk after treatment (SVR),19/20 (95%) treated patients and 23/30 (77%) controls were HCV RNA negative (P < 0.001).Baseline serum vitamin D levels were lower at baseline (20 ± 8 ng/mL) and increased after 12 wk vitamin D treatment,to a mean level of (34 ± 11 ng/mL).Logistic regression analysis identified vitamin D supplement [odds ratio (OR) 3.0,95% CI 2.0-4.9,P <0.001],serum vitamin D levels (< 15 or > 15 ng/mL,OR 2.2,P < 0.01),and BMI (< 30 or > 30,OR 2.6,P < 0.01) as independent predictors of viral response.Adverse events were mild and typical of Peg/RBV.CONCLUSION:Low vitamin D levels predicts negative treatment outcome,and adding vitamin D to conventional Peg/RBV therapy for patients with HCV genotype 2-3 significantly improves viral response.

  13. Vražda formy a "rozkouskované tělo"

    Lahoda, Vojtěch

    Praha : Arbor vitae, 2008 - (Srp, K.; Rakušanová, M.), s. 30-47 ISBN 978-80-87164-11-2 Institutional research plan: CEZ:AV0Z80330511 Keywords : painting * modernism * Cubism * Emil Filla * figure Subject RIV: AL - Art, Architecture, Cultural Heritage

  14. Regionální využití franchisingové formy obchodu

    Exnerová, Jovana

    2012-01-01

    Disertation discourses regional utilization of franchise bussiness model, primarily analyzing todays economic situation of researched enterprises. It is separated into two parts: Theoretical part presents keystone of dissertation. In the beginning, basic concepts are defined, followed up with history and present of franchising around the world and in the Czech Republic. We also pay attention to economic indicators in detail. Conclusion of first part is formed by characteristics of research...

  15. Sofistikované formy násilí na pracovišti

    Mládková, Libuše

    2013-01-01

    Various forms of workplace violence can sort between socially pathological phenomena that can affect how the affected workers and their families, colleagues and the organization itself, as well as society at large. Psychological terror in the workplace must be taken seriously because the consequences are complex. Relationships to others are an essential part of our lives and not just the work. It is therefore no coincidence that the good relations in the workplace, the organization pays. M...

  16. Formy násilí na pracovišti

    Veselá, Lucie

    2014-01-01

    The thesis focuses on violence in the workplace. The theoretical part explains all important terms related to bullying in the workplace. The aim is to determine how the problem is perceived and awareness of mobbing and other forms of violence. The analytical section interprets results of the questionnaire, to do this. The survey was conducted at the Fire and Rescue Service Central Region.

  17. FLEXIBILNÍ FORMY PRÁCE V ČESKÉ REPUBLICE A NORSKU

    Drapáková, Karolína

    2014-01-01

    The goal of the master thesis is the research and comparison of the flexible forms of work in the Czech Republic and Norway in the 2004 - 2013. The theoretical part of the thesis is dedicated to the changes on the labour markets leading to higher unemployment and insecurities of the labour market. In the practical part are listed the forms of working contracts according to the labour law in the Czech Republic and Norway. The analysis of the Czech and Norwegian labour market has the focus on t...

  18. Formy regenerace a její současné trendy

    PEKÁRKOVÁ, Petra

    2014-01-01

    The thesis comprises a comprehensive summary of particular types of regeneration and their contemporary trends. The introduction focuses on regeneration and relaxation in general, and then the attention is given to the mechanotherapy- massage, its types, health effects and history. The heat therapy which is specialized in sauna and its new trends is connected with the mechanotherapy. To the heat therapy belong also packs and compresses. The hydrotherapy and its several types are characterized...

  19. Formy činnosti veřejné správy

    VEBER, Luděk

    2015-01-01

    Bachelor thesis "Forms of public administration activity" talks about possible implementation of magistracy which is exercised by administrative authorities (administrative body, territorial autonomous body and other bodies). The activity of public administration is always legal and can have various legal forms as for example legal form (general application orders, regulations, statutory rules and public arrangements), internal rules and also individual public administrative acts (decision, r...

  20. Testování slabé formy efektivnosti devizového trhu

    Havel, Radek

    2009-01-01

    The goal of my thesis is to verify the weak form of the efficiency of the exchange market. The paper results from the presumptions for efficient price movements on the financial markets. They are applied to the time series of exchange rates of five currency pairs. After definitions of testing methodology, the given exchange rates series are analysed with the help of correlation and autocorrelation test, runs test and a test based on technical analysis. The conclusion of the thesis anwers the ...

  1. Elastyczne formy pracy w aktywizacji zawodowej osób niepełnosprawnych

    Niedźwiedziński, Marian; Bąkała, Anna Maria

    2007-01-01

    In the age of Electronic Commerce each solution that could enhance the competitiveness is worth considering. Telework seems to be a perfect way to use a great potential of many workers being able to work effectively with the use of computer and internet tools. In the case of telework it doesn’t matter whether the worker is a disabled person - his skills are all that matters. In this paper the possibility of employing the disabled as teleworkers is presented. The economic and so...

  2. Penzijní připojištění a jeho formy

    Lášková Dlabačová, Milada

    2011-01-01

    This Diploma thesis „Types of Supplementary Pension Insurance” deals with pension scheme systems in the Czech Republic. This subject is particularly important, given the upcoming pension reforms. This paper defines the purpose of pension schemes, and further highlights the benefits for pension plan participants, employers and employees. The main aim of this study is to evaluate the existing options available on the Czech pension insurance market, mutual comparison of the existing pens...

  3. WPŁYW OPODATKOWANIA NA WYBÓR FORMY INWESTYCJI BEZPOŚREDNIEJ W POLSCE

    Jamroży, Marcin

    2003-01-01

    The paper makes a comparison by means of the net terminal value method the current tax charges of two basic forms of direct investment, i.e. partnership/branch and company. The analysis shows that in the case of a German private businessman or partnership in Poland it is generally more advantageous in terms of tax to establish a partnership/branch than a company. This refers especially to highly profitable investments (i.e. yielding high profits in terms of absolute figures), s...

  4. Formy regionální kooperace z pohledu podpory produkce

    KARBULKA, Tomáš

    2009-01-01

    The main aim of this thesis was the analysis of a local action group and definition of its potential in the field of local production support. This namely concerned Local action group Hlubocko - Lišovsko. Analyses of primary data showed that local action group support local production.

  5. Formy regionální kooperace z pohledu podpory produkce

    TONDROVÁ, Lucie

    2009-01-01

    In my bachelor thesis I looked at the analysis of the activities of Local action group. Specifically, the Local action group Pomalší. The main task was to characterize the aktivity of Local action group Pomalší and to define its potential in promoting production.

  6. Vybrané formy vstupu podniku na zahraniční trh

    Bitnarová, Andrea

    2014-01-01

    The aim of this thesis is to provide a comprehensive overview of the possible forms of entry on foreign markets. Various inputs are compared according to an advantages and disadvantages. Diploma thesis is focused on trading with West Africa, particularly with Nigeria. Therefore I will bring the importance of the process of discussions and negotiations with respect to awareness of differences in cultural aspects of the negotiations and contracts. In conclusion, I refer to the establishment of ...

  7. Bezpośrednie formy demokracji przemysłowej w krajach Europy Zachodniej

    Rudolf, Stanisław

    1985-01-01

    The author his made an attempt at determining the role of new forms of work organization for the industrial life democratization in the West. Growing interest taken in these forms recently is connected with the fact that they allow to mitigate the difficulties accumulating in the enterprise. From among the analyzed forms of organization of work such as job rotation, job enlargement, job enrichment and autonomous groups, mainly the two last mentioned forms afford a higher autonomy for em...

  8. Formy kompenzace stresu u vedoucích pracovníků

    Šíma, Jiří

    2010-01-01

    The Bachelor Thesis deals with the issueof stress in managersand with the way managers compensate their stress. This Bachelor thesis concentrated the theoretical part on the causes, clasification, signs, consequences and compensation of stress with focus on work stress related to managers

  9. „PRANIE PIENIĘDZY” - FORMY I ZAGROŻENIA SPOŁECZNE

    Prengel, Marek

    2000-01-01

    In the beginning of his article the Author discusses acs that necessarily must precede the money laundering, i.e. a so-called illicit activity of primary nature. For instance, these acts are: illicit production o f drugs and next trading them, illegal gambling, white slave trade, living on the earnings of a prostitute and giving her protection, illegal immigration, trading of radioactive materials or of weapons, etc., briefly - all acts committed in order to acquire dirty sums of ...

  10. Tvorba zájezdu podle druhu(formy) cestovního ruchu

    Tomšů, Gabriela

    2013-01-01

    The aim of this thesis was to create an untraditional incoming tourism original tour based on the demand of the foreign travel agency which consists of a recognizing mainly of the South Moravian region and a staying in Priessnitz's health resort in Jesenik with a wellness program. The South Moravia is very attractive region as well as mentioned helth resort. This thesis is divided into two parts. In the first part basic terms are characterized, the tour is created in the second part. The whol...

  11. Formy a typy nevolební politické participace v Evropě

    Vlachová, Klára; Lebeda, Tomáš

    2009-01-01

    Roč. 7, č. 1 (2009), s. 8-10. ISSN 1214-1720 Institutional research plan: CEZ:AV0Z70280505 Keywords : active-conventional participation * passive participation * active- protest participation Subject RIV: AD - Politology ; Political Sciences http://www.socioweb.cz/upl/editorial/download/162_socioweb_01_09.pdf

  12. Pracovní doba a flexibilní formy práce

    Rombaldová, Karolína

    2011-01-01

    Suitable working time arrangements, implementation of flexible forms of work and a provision of sufficient rest periods are vital prerequisites for the creation of favourable working conditions leading to a satisfaction of both employees and employers. This bachelor thesis deals with the legal regulation of working hours and rest periods in the Labour Code, comparison of the duration of working hours in the Czech Republic and other countries of the European Union and furthermore deals with th...

  13. Růstové formy lučních rostlin

    Klimešová, Jitka; Klimeš, Leoš; Latzel, Vít

    Veselí nad Moravou : ZO ČSOP Bílé Karpaty, 2008 - (Jongepierová, I.), s. 95-100 ISBN 978-80-903444-6-4 R&D Projects: GA ČR(CZ) GA526/06/0723 Institutional research plan: CEZ:AV0Z60050516 Keywords : plant functional traits * plant height * clonality Subject RIV: EF - Botanics

  14. Formiści. Pomiędzy tradycją a awangardą

    Geron, Małgorzata

    2012-01-01

    Formists were the first avant-garde movement in Polish art that integrated the creators coming from various artistic milieus: Krakow, Warsaw and Lvov. The members of the group on principle rejected Naturalism and Impressionism and took their inspiration from Expressionism, Cubism, and Futurism. Nevertheless, apart from the works that presented purposeful deformation of form, color and space, the painters created works drawing from both classical and folk art. This current was particularly vis...

  15. Rodina, její formy a přeměny

    Tesařová, Žaneta

    2014-01-01

    My bachelor thesis deals with the issue of family, its changes and different forms of family life. The work is divided into theoretical and practical part. The theoretical part focuses on the definition of family from different points of view. It also describes its functions and compares traditional and modern families. An essential part of this work deals with modern or more precisely postmodern family. It is concerned with the theme of marriage and its alternatives, as well as questions abo...

  16. Formy vybraných kovů ve vodních systémech.

    Němec, Tomáš

    2008-01-01

    Technika difuzního gradientu v tenkém filmu (DGT) byla použita ke stanovení koncentrací labilních forem vybraných kovů (Cu, Ni, Pb) v odpadní vodě odcházející z Fakulty chemické VUT v Brně.

  17. Formy náhradní rodinné péče v ČR

    NAUŠOVÁ, Jitka

    2008-01-01

    My work contains the basic forms of substitute family care in the Czech republic and also a brief history of adoption and foster-parent´s care. It describes a family, its importance and functions. It mentions the defects in a family and parenhood. It makes clear both the criteria of child´s location in the substitute family care and the selection of the applicants. It shows the way how to ask for the substitute family care. The legal norms how make substitute family care posible are mentioned...

  18. Formy działania jednostek samorządu terytorialnego w odniesieniu do pieczy zastępczej

    Szwaja, Jacek Z.

    2012-01-01

    Artykuł recenzowany / peer-reviewed article Local government units are legally obliged to carry out a number of tasks in the foster care system for children. These tasks generally referred to the Family and Guardianship Code specifi es support for families and foster care system. The proper execution of these tasks requires appropriate forms of action. The paper presents: the type and form of tasks as well as and the legal action and actual actions taken in the field by the various local g...

  19. Vybrané formy podnikání a jejich zdaňování

    Ištvánková, Šárka

    2015-01-01

    Tato bakalářská práce se zabývá zdaňováním příjmů fyzických osob z podnikání a jiné samostatné činnosti. Jejím cílem je porovnat daňovou zátěž živnostníků a společnosti s ručením omezeným a na základě zjištěných poznatků navrhnout kroky vedoucí k daňové optimalizaci. Za pomoci modelové situace porovnává, za kterých podmínek je vhodné podnikat jako živnostník a kdy jako společnost s ručením omezeným u konkrétního poplatníka. The bachelor thesis deals with taxation of personal business and o...

  20. Původ a formy titanu v historické a moderní malbě

    Hradilová, J.; Hradil, David; Grygar, Tomáš; Šímová, Veronika

    Praha: STOP, 2003, s. 21-25. [Restaurování barevné vrstvy obrazu. Praha (CZ), 27.11.2003] Institutional research plan: CEZ:AV0Z4032918 Keywords : microstructural pattern * stratigraphy of colour layers * bole grounds Subject RIV: CA - Inorganic Chemistry

  1. Střešní zahrady - návrh extenzivní a intenzivní formy

    Vášová, Denisa

    2012-01-01

    Green roof – design of extensive and intensive form This diploma thesis discusses the benefits and importance of the creation of roof gardens, especially in cities. It introduces green roofs as an ecological and aesthetical part of buildings. A Brief History provides an overview of the original idea of roof gardens and their development through the ages until today recent since 1989, when we got to the fresh wind from the western countries and development in this sector began to spread acr...

  2. Opodatkowanie IKE i IKZE jako formy gromadzenia środków emerytalnych oraz instrument optymalizacji podatkowej

    Witczak, Radosław

    2012-01-01

    In the article the tax effects of „IKE” and „IKZE” were presented. The areas of tax risk concerning the use of „IKE” and „IKZE” in the Personal Income Tax were given. The tax avoidance instruments by using „IKE” and „IKZE” were discussed.

  3. Mesostruktura poroskov Gd(OH)CO3xH20 s casticami sfericeskoy formy zadanogo razmera

    Chuvasheva, I. G.; Vanetsev, A. S.; Kopitsa, G. P.; Baranchikov, A. E.; Angelov, Borislav

    Gatchina : National Research Centre "Kurchatov Institute", Petersburg Nuclear Physics Institute B. P. Konstantinov, 2014. s. 128. [PNPI School on condensed state physics /48./ - CSP-2014. 10.03.2014-15.03.2014, St. Petersburg] R&D Projects: GA ČR GAP208/10/1600 Institutional support: RVO:61389013 Keywords : gadolinium nanoparticle * controlled nanoparticle size * small-angle X-ray scattering Subject RIV: CF - Physical ; Theoretical Chemistry

  4. Volba právní formy podnikání - ekonomická kritéria

    Krejčová, Šárka

    2013-01-01

    This diploma thesis Choice od the Form of a Business - Economics´Criterions is written as a methodological guidance for the entrepreneurs starting their business. The methodological guidance is focused on selection of appropriate type of business entity considering tax burden. Using model examples profit figure and tax burden for specific situations were found and these results set limits to advantageousness of specific types of business entity. This thesis also comprises the guide for na...

  5. Testování slabé formy efektivnosti akciových trhů

    Čmedlová, Tereza

    2014-01-01

    This thesis deals with testing the weak form of the efficiency of the Czech and German stock markets during the particular years 2000-2013. First the principle of theory of efficient market and prerequisite for functioning are illustrated and the characteristics and forms of efficient market are defined. The reader is also introduced to a random walk model. The main section deals with brief characteristics of stock index PX and stock index DAX and subsequently testing if the behavior of Czech...

  6. Alternativní formy finančního řešení rizikovosti

    Müller, Michal

    2010-01-01

    This diploma thesis deals with a considerable innovation of modern finance, insurance securitization. For better understanding of this concept it is important to consider insurance securitization in a broader context of financial securitization, which is presented in the first chapter. In the second part of this work the factors which have led to the development of insurance securitization are mentioned. Then there is a short comparison of insurance securitization with financial securitizatio...

  7. „Titofania”. Formy obecności symbolicznej Josipa Broza Tity w Jugosławii doby socjalizmu

    Bogusławska, Magdalena

    2013-01-01

    Text is an analysis of symbolic strategies, servingcreation of Josip Broz Tito’s authority as the leader of the socialist Yugoslavia; it also reveals their cultural and political motivations. Author indicates three dominant factors in the process of cult creation, which are characteristic for the cult of personality in totalitarian systems; as such they also remain a specific continuation of traditions as a base of the local power culture. In this perspective, the T...

  8. Mzdový systém a formy odměňování

    Fialová, Miroslava

    2011-01-01

    This dissertation work deals with characteristic of the wage system in the Czech republic and analysis of company remuneration in Center of social services Prague. The wage system can be also expressed as a group of standards, rules and regulations that regulate the employment and bonuses in company and the employees’ motivation to better performance. The literature search deals interpretation of relations between employer and employees and providing benefits. In the practical part is m...

  9. TRADIČNÉ NÁSTROJE VERZUS NOVÉ FORMY A TRENDY V MARKETINGOVEJ KOMUNIKÁCII PODNIKOV NA SLOVENSKU

    Katarína Grančičová

    2015-12-01

    Full Text Available The changes taking place in the marketing environment of companies since the beginning of the 21st century can be described as fundamental. Marketing reacts to them by changing its orientation and developing its tools, as well as the means of their use in practice. In marketing communication, and especially in establishing the communication mix, the following aspects are becoming key: below-the-line activities, direct marketing, the internet, social networks and creative communication campaigns with the aim of promoting communication among customers (WoM. In the context of the above-mentioned trends and using data from a questionnaire-based survey, this article evaluates the quality of marketing communication of Slovak companies, with an emphasis on the extent of use of current trends and new forms in their marketing communication. This analysis also includes a statistical verification of how the use of new trends and forms of marketing communication depends on selected factors, as well as an evaluation of the impact of these factors on the given area. The selection of factors, such as company size, presence of foreign capital, sector, or primary market orientation of the company, was based on a logical assumption of their potential relevance for the studied subject. The article concludes by summarizing the established facts and outlining both existing problems and their possible solutions. The main finding is that the marketing communication of Slovak companies has not yet seen the expected shift as regards the importance of the individual forms of communication. In other words, traditional forms of communication are still prevailing. The use of alternative forms of marketing is another problem, since they are generally not seen as trustworthy, they are underestimated, and there is a general lack of experience regarding their use.

  10. Cestovní pojištění a jeho formy v ČR

    HOŠKOVÁ, Lenka

    2013-01-01

    The subject of my work „Travel insurance and its forms in Czech Republic“ is to discribe the travel insurance. In the first part, there is insurance discribed in the theory. The second part is focus on travel insurance. I selected sixt insurance companies and I focus on their history and offer in the travel insurance. In the end I compared products of those insurance companies including calculation of insurance rate.

  11. The study of proton transfer reactions and their application to nuclear level counting via the reactions 23Na, 28Si, 32S(d,n)

    This work was undertaken with two major objectives. The first objective was to resolve the discrepancies in the existing spectroscopic factors for the levels of 24Mg and to use this nucleus to test the suitability of (d,n) reactions for level counting. The second objective was to study proton transfer to unbound states in 29P and 33Cl within the framework of the standard DWBA formalism by using the form factors of the bound isobaric analog states of these nuclei. The time-of-flight (TOF) spectrometer was used to measure differential cross sections and neutron energies for the three reactions studied in this work. The energy levels of 24Mg were studied at seven incident energies (2.5-9.0 MeV) with an energy resolution of 12-125 keV at both forward and back angles at each incident energy. Out of 157 levels taken from compilations, 124 of them were observed. This study has also resulted in the proposal of 24 additional new levels in 24Mg. These results show that the (d,n) reaction may be used for level counting

  12. Analýza přesnosti výroby lamel formy pneumatiky vyráběných SLM technologií

    Tomeš, Jan

    2016-01-01

    Práce se zprvu věnuje analýze a hodnocení stávající výroby lamel na dvou SLM zařízeních PXL a M2 Cusing, firem Phenix Systems a Concept Laser. Vzorky z obou strojů prošly stejným výrobním procesem a stejným procesem měření a vyhodnocení tak, aby mohlo proběhnout porovnání mezi jednotlivými stroji. Na vzorcích se porovnává geometrická přesnost, drsnost povrchu, mechanické vlastnosti a materiálová struktura. Pro lamely bylo nutné vytvořit digitální metodiku hodnocení geometrie. V další části pr...

  13. Ideologizace vědy a školství. Formy a vlivy kulturní politiky KSČ (1945-1953)

    Devátá, Markéta; Olšáková, Doubravka

    Praha : Ústav pro soudobé dějiny AV ČR, 2011 - (Kocian, J.; Devátá, M.), s. 323-335 ISBN 978-80-7285-108-9. - (České křižovatky evropských dějin. 3) R&D Projects: GA ČR GA409/07/1415 Institutional research plan: CEZ:AV0Z80630520 Keywords : history after 1945 * science and education * ideology Subject RIV: AB - History

  14. Komparace zdanění zisků podnikatelů podle právní formy podnikání

    Homolková, Lenka

    2008-01-01

    This diploma Thesis was focused on comparison of profit taxation by legal form of business. Two legal forms were chosen - sole trader and limited company. The main objective was to compare the effective rate of taxation of defined incomes in the period 2003 to 2009. The maximum amount of income produced was set to 5 million CZK. A secondary goal of this work was to describe and analyze which types of income can one reach through doing business via Ltd. In the final analysis, when compared wit...

  15. Ekologické formy zemědělství v Krkonoších: krajina, ekoturismus, udržitelnost

    Klapka, Pavel; Klapková, E.; Martinát, Stanislav

    2005-01-01

    Roč. 42, č. 42 (2005), s. 127-137. ISSN 0139-925X Institutional research plan: CEZ:AV0Z3086906 Keywords : environmental-friendly farming * ecotourism * regional development * sustainability Subject RIV: DE - Earth Magnetism, Geodesy, Geography

  16. Výskyt a formy mobbingu v českém pracovním prostředí

    Zábrodská, Kateřina; Květon, Petr

    Praha : Vysoká škola ekonomická, 2012. s. 26-27. [Konference Psychologie práce a organizace v ČR. 20.09.2012-21.09.2012, Praha] R&D Projects: GA ČR GPP407/10/P146 Institutional support: RVO:68081740 Keywords : mobbing * prevalence * employee relationships Subject RIV: AN - Psychology

  17. Formy zlepšujících (KAIZEN) aktivit ve firmách z vybraných oborů

    Sukdolák, Martin

    2009-01-01

    The goal of the thesis is to analyze continuous improvement (Kaizen) activities in companies, which operates in the Czech Rep. Based on this analysis, defining criteria for optimal selection of forms of continuous improvement activities, and aplling suitable tools and methods of continuous process improvement will follow.

  18. Podnikatelský záměr agroturistické farmy a možné formy financování

    ČÍŽKOVÁ, Barbora

    2012-01-01

    The main aim of this Diploma Thesis was created documentation for optimal business plan for a farm of agritourism. The Diploma Thesis analyses the development of provincial tourism in the region of Český Krumlov and its preconditions for rural tourism. In the analysis is monitored accommodation capacity, possible forms of financing, current trends and potential for diversification of farm.

  19. Dopady finančnej krízy na využívanie teleworku ako flexibilnej formy práce

    Duľová, Daniela

    2011-01-01

    This thesis describes a concept of telework, its background, diffusion and penetration, the European Framework Agreement on Telework and provides a detailed analysis of home office as one form of telework in Czech Republic and Germany during the financial crisis. Evaluating the impacts of the financial crisis on using this form of flexible working is based on statistical data, researches and case studies from both countries and on interviews with representatives of two companies located in Cz...

  20. Automatizace stroje pro odebírání dílů z formy vstřikovacího lisu

    ŠEFČÍK, Josef

    2010-01-01

    The aim of this bachelor project is to make design and solution of machine-automation for taking parts from the injection molding machine. Based on the requirements of costumer, will be create a proposal design and mode of implementation for the automation. The next part focus on selection of sensors, that are the most optimal for this application, with regard to the right and error-free machine operation, than on selection and design of the control unit, whose parameters conform to the contr...

  1. Podoby a formy aktivní imaginace: návrh konceptuálního rámce

    Chrz, Vladimír

    2011-01-01

    Roč. 55, č. 2 (2011), 97-111. ISSN 0009-062X R&D Projects: GA AV ČR(CZ) IAA701840901 Institutional research plan: CEZ:AV0Z70250504 Keywords : active imagination * transcendent function * semantic innovation Subject RIV: AN - Psychology Impact factor: 0.087, year: 2011

  2. Szacowanie podstawy opodatkowania w podatku od towarów i usług jako formy przeciwdziałania oszustwom podatkowym – wybrane zagadnienia

    Witczak, Radosław

    2013-01-01

    The problem of tax assessment in the VAT tax was presented. The provisions point out different methods of assessment of the tax base. The analyse of use of different methods in assessment of the tax base in VAT was given. The associated enterprises can also diminish tax liabilities in the VAT. Tax authorities can assess the turnover in such situation but the provisions curtail the tax assessment. The possibility of changing the provisions in this respect was discussed.

  3. Biodosažitelné formy vybraných nutrientů v luštěninách

    Landauf, Lukáš

    2015-01-01

    This thesis deals with the quantitative determination of bioaccessible contents of selected elements (Cu, Fe, Zn) in legumes: chickpeas, pea, lentil, soybean, bean. The UBM in-vitro test was used for the study of bioaccessible forms. This method simulates human digestion using synthetic gastric juices. Atomic absorption spectrometry was used for the determination of the total content of selected elements in legumes and their bioaccessible contents in gastric and gastro-intestinal human tract....

  4. Vybrané právní formy podnikání zahraničního subjektu v ČR

    Pacovský, Martin

    2012-01-01

    The work deals with the topic of entry of foreign entrepreneurs to the Czech market on the background of two different forms of business - franchising and a limited liability company. The main topic concentrates on the comparison of legislation and contractual framework of these two business forms, primarily focusing on intellectual property and the protection of intangible assets. The work presents general legal provisions related to contracts in the field of intellectual property rights, in...

  5. Measurement and Calculation of Relaxation Time T2 and diffusion of Gel Electrolytes Based on the NaClO4 Inorganic Salt During Polymerization by NMR Method with Focusing on 23Na and 1H Nuclei

    Kořínek, Radim; Bartušek, Karel; Vondrák, I.; Musil, M.

    Bratislava : Slovak Academy of Sciences, 2011, s. 131-134. ISBN 978-80-969672-4-7. [International Conference on Measurement 2011 /8./. Smolenice (SK), 27.04.2011-30.04.2011] R&D Projects: GA MŠk ED0017/01/01 Institutional research plan: CEZ:AV0Z20650511 Keywords : T2 relaxation * diffusion * NMR * measurement Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering

  6. Ultracold collisions in a dual species 23Na-133Cs magneto-optical trap%磁光阱中超冷钠-铯原子碰撞的实验研究∗

    徐润东; 刘文良; 武寄洲; 马杰; 肖连团; 贾锁堂

    2016-01-01

    The production and research of ultracold heteronuclear molecules have aroused the great interest recently. On the one hand, these molecules are extremely popular in experiments for exploring the collision dynamic behaviors in threshold, photoassociative spectrum and strong dipole-dipole interactions. On the other hand, ultracold polar molecules populated at deeply bound levels in the singlet ground state are the right candidates to investigate quantum memories for quantum simulation, and to study strongly interacting quantum degenerate gases. The precise knowledge of cold collision processes between two different types of alkali atoms is necessary for understanding and utilizing ultracold heteronuclear molecules, sympathetic cooling, and thus formation of two species BEC. The goal of the present investigation is to study the collisions between ultracold sodium atoms and cesium atoms. We systematically demonstrate simultaneously trapping ultracold sodium and cesium atoms in a dual-species magneto-optical trap (MOT). The sodium atom trap loss rate coefficient βNa-Cs is measured as a function of Na trapping laser intensity. At low intensities, the trap loss is dominated by ground-state hyperfine-changing collisions, while at high intensities, collisions involving excited atoms are more important. A strong interspecies collision-induced loss for Na atoms in the MOT is observed. In order to obtain the trap loss coefficient βNa-Cs, we proceed in two steps. First, the Cs repumping laser is blocked to avoid the formation of ultraold Cs atoms. The loading process of Na atoms is recorded when the Cs trapping laser is on. Second, the loading curves of the Na atoms are obtained as Cs atoms are present with the repumping laser beams. The total losses PNa and P′Na are acquired by fitting the two loading curves of trapped Na atoms. Thus, the trap loss coefficientβNa-Cs can be derived from the difference between total losses PNa and P′Na divided by the density of the Cs atoms. The coefficient βNa-Cs decreases in a range of 5–10 mW/cm2, which originates from the hyperfine-state changing (HFC) collision. A Doppler model is used to calculate the Na atom trap depth, in that the atom trap depth and exoergic energy determine the behavior of the collisional trap loss rate coefficient. The three corresponding calculated critical intensities of Na trapping laser are 7.98, 14.82, 16.2 mW/cm2 respectively in the Na-Cs HFC collision process. The first calculated critical intensity value agrees well with the experimental result. Our work provides a valuable insight into HFC collision between Na and Cs atoms and also paves the way for the production of ultracold NaCs molecules using Photoassociation (PA) technology. Furthermore, the experimental results lay a great basis for the obtainments of high sensitive heteronuclear NaCs molecular PA spectrum and the creation of deeply bound ground state molecules.

  7. Financování příspěvkových organizací z pohledu jejich hospodářsko - právní formy

    Bienová, Lucie

    2008-01-01

    This thesis describes funding of social services in view of different economic-legal forms. There are an accounting and funding of allowance organizations and other forms of companies and their advantages and disadvantages. The practical part is illustrated by Rest home "V Podzámčí" including its financial analysis and its cost calculation.

  8. Formy podpory rozvoje konceptu sociálního podnikání posledních deseti let ve vyspělých zemích

    Parkánová, Lenka

    2012-01-01

    The Master thesis offers an analysis of different forms of social enterpreneurship support in developled countries. Perspective of various economic thoughts and concepts is applied. Firstly, the social entrerpise is introduced in a broader sector, historical, geographical and societal context. Secondly, different motives of social enterpreneurship support are introduced while applying mainstream economic thinking, insitutional theories and economic localisation approach. After summary of vari...

  9. Kulovité železité konkrece v křídových pískovcích severních Čech: geneze a formy výskytu

    Adamovič, Jiří; Rückl, P.; Langrová, Anna

    2010-01-01

    Roč. 2009, - (2010), s. 12-16. ISSN 0514-8057 R&D Projects: GA AV ČR IAA300130806 Institutional research plan: CEZ:AV0Z30130516 Keywords : hematite * goethite * concretions * Ostwald-Liesegang cycle * Bohemian Cretaceous Basin Subject RIV: DB - Geology ; Mineralogy http://www.geology.cz/zpravy/obsah/2009/2009-4.pdf

  10. Metody a formy práce s mládeží v domech dětí a mládeže a v nízkoprahových klubech

    JAKEŠ, Vladimír

    2013-01-01

    This bachelor thesis describes ways and methods of work with children and young people in community centers. Theoretical part states the expression of ?Leisure Time? and historical development of the way people have spent their free time, based on literature. It deals with the problem of bringing up young people in their free time and also with the field of Leisure Time Pedagogy. The thesis includes a list of institutions offering meaningful activities to children and young people within the ...

  11. Veřejný prostor současného města - nové formy, aktuální problémy

    Kratochvíl, Petr

    Brno : Ústav územního rozvoje, 2013, s. 20-24. ISBN 978-80-87318-27-0. [Veřejný prostor, veřejná prostranství. Znojmo (CZ), 21.11.2013-22.11.2013] R&D Projects: GA ČR(CZ) GAP409/11/2220 Institutional support: RVO:68378033 Keywords : public space * contemporary architecture * town planning * public art Subject RIV: AL - Art, Architecture, Cultural Heritage

  12. Návrh změny právní formy podnikání - založení společnosti s ručením omezeným

    Líkař, Václav

    2011-01-01

    This diploma thesis deals with formulation of the proposal to change the legal form of business for a selected business entity doing business as an association of individuals who decided to transform into a limited liability company. There is an analysis procedure for establishing a limited liability company in this paper and allocation of the costs involved. The analysis of the change from business of individuals to limited liability company focused on the aggregation of both types of busine...

  13. Priame formy účasti občanov na činnosti orgânov štâtnej moci a sprâvy v ĆSSR

    Palúš, Igor

    1991-01-01

    In his paper the author analyses the participation of citizens in the activity of state and administrative organs, within the system of federal Czechoslovak authorities. The introductory part consists of considerations of the conception of participation of the working people in control of the socialist community, stressing by the way the mutual importance of political and economic postulates in the process of managing the social and national matters. In the essential part of th...

  14. Nieformalne związki jedno i dwupłciowe jako alternatywne formy życia małżeńsko-rodzinnego. Analiza jakości i stabilności relacji

    Jankowiak, Barbara

    2013-01-01

    This thesis presents the characteristics of alternative forms of marriage and family life with special consideration of cohabitation and homosexual relations. These untraditional kinds of partnership relations are more and more common and become new socialization patterns. An analysis was carried out of the satisfaction and stability of informal same- and different sex relations and a comparison of these relations was made to the intimate relations of marriages in order to esta...

  15. Koncentrace a formy fosforu v odtoku z malých zemědělských povodí v povodí nádrže Orlík

    Richtr, J.; Hejzlar, Josef; Semančíková, E.

    České Budějovice: VŠTE, 2009, s. 65-74. ISBN 978–80–87278–29–1. [Revitalizace Orlické nádrže 2009. Písek (CZ), 06.10.2009-07.10.2009] R&D Projects: GA AV ČR(CZ) 1QS600170504 Institutional research plan: CEZ:AV0Z60170517 Keywords : P transport * eutrophication * agriculture Subject RIV: DJ - Water Pollution ; Quality

  16. Šikana na pracovišti v prostředí českých univerzit: výskyt, formy a organizační souvislosti

    Zábrodská, Kateřina; Květon, Petr

    2012-01-01

    Workplace bullying (or mobbing) refers to a destructive form of behaviour that occurs within organisations and that inflicts psychological and social harm on targeted employees, creates a hostile work environment, and affects organisations negatively. This article presents findings from the first Czech study into workplace bullying and other forms of negative workplace behaviour in Czech universities. The aim of the study was to analyse the incidence of bullying among university employees and...

  17. The Problem of Form in Objects under Redevelopment (On the Basis of Bytom Market Square Redevelopment Design) / Problem Formy W Obiektach Przebudowywanych (Na Przykładzie Projektu Realizacyjnego Przebudowy Bytomskiego Rynku)

    Maryńczuk, Paweł

    2015-03-01

    The author believes that if a designer has performed many design or research works entailing solutions to various problems, it is recommendable to consider and become aware of previously used methods whose application might have been unwitting or instinctive. The outcome of such reflection can be worth describing and recording in order to formulate a set of guidelines useful in the future. Such methods, being intuitive in nature, are often tied to the designer's subconsciousness, thus are rarely expressed in a clear manner. By using own methods a designer can prove that space should be composed in a given way in order to address specific needs and defined objectives. All this is aimed at preventing accidental formation of space. An example of reasoning serving the aforementioned purpose can be found in a method referred to as CQC or Composition Quality Control, the application of which facilitates intentional shaping of an architectural piece of work. Autor uważa uważa, że jeśli projektant ma za sobą wiele prac projektowych lub też prac badawczych, które połączone były z rozwiązywaniem różnych problemów, to warto zastanowić się i uświadomić sobie sposoby, które dotychczas - może nieświadomie lub odruchowo - były stosowane. Wynik refleksji warto opisać i zapisać po to, żeby ująć go w układ wskazań na przyszłość. Metody te, mając charakter intuicyjny, często związane są z podświadomością projektanta, w związku z tym rzadko można spotkać je jako wyrażone w sposób wyraźny. Stosując metody własne można dowieść, że przestrzeń winna być komponowana tak, a nie inaczej dla określonych potrzeb i wytyczonych celów tak, aby jej forma nie była przypadkowa. Przykładem takiego rozumowania jest przyjeta metoda KJK, której zastosowanie pomaga w swiadomym kształtowaniu dzieła architektonicznego.

  18. Šikana na pracovišti v prostředí českých univerzit: výskyt, formy a organizační souvislosti

    Zábrodská, Kateřina; Květon, Petr

    2012-01-01

    Roč. 48, č. 4 (2012), s. 641-668. ISSN 0038-0288 R&D Projects: GA ČR GPP407/10/P146 Institutional support: RVO:68081740 Keywords : workplace bullying * mobbing * universities * organisational context * toxic workplace Subject RIV: AN - Psychology Impact factor: 0.652, year: 2012

  19. Экслибрисы Юрия Орлова получили признание в Польше

    2009-01-01

    Graafik Juri Orlov sai Poolas toimunud Rahvusvahelisel graafiliste väikevormide ja eksliibriste biennaalil (XIII Międzyanrodowe Biennale Małej Formy Graficznej i Ekslibrisu, Ostrów Wielkopolski 2009) laureaadi tiitli

  20. Užívání návykových látek studenty prezenční formy studia na Zdravotně sociální fakultě Jihočeské univerzity

    MUŽÍK, Petr

    2012-01-01

    This bachelor thesis presents findings of a research related to the usage of tobacco products, alcohol and drugs among full-time students at the Faculty of health and social studies of the University of South Bohemia. The aim of research was to find out whether the students use addictive substances, in which form and how often do they use them, what the negative effects are, what the prevalence of substances is, in which period of school year are the addictive substances used more, etc. The t...

  1. Účetní, daňové a právní aspekty přeměny právní formy podnikání fyzické osoby na právnickou osobu v podmínkách ČR

    BENDOVÁ, Eva

    2014-01-01

    The aim of this work is to evaluate the accounting, tax and legal aspects of the change in the legal form of business in a particular case in connection with the legal regulations of the Czech Republic. The aim of the research is to analyze the legal forms of business, including the advantages and disadvantages of the various types of business, on which is followed by possible variants of transformation, furthermore the creation of a draft for the establishment of a limited liability company ...

  2. Vazba mutantní formy proteinu p53 k intronovým a intergenním sekvencím tvořícím triplex DNA reguluje expresi genů u buněk U251

    Tichý, Vlastimil; Quante, T.; Tögel, L.; Walter, K.; Navrátilová, Lucie; Lexa, M.; Deppert, W.; Tolstonog, G.V.; Paleček, Emil; Brázdová, Marie

    Praha, 2009. s. 452. ISSN 0009-2770. [Mezioborové setkání mladých biologů, biochemiků a chemiků. Konference Sigma-Aldrich /9./. 26.05.2009-29.05.2009, Devět skal - Žďárské vrchy] R&D Projects: GA MŠk(CZ) 1K04119; GA MŠk(CZ) LC06035; GA ČR(CZ) GP204/06/P369; GA ČR(CZ) GA204/08/1560; GA AV ČR(CZ) IAA500040701 Institutional research plan: CEZ:AV0Z50040507; CEZ:AV0Z50040702 Keywords : mutant p53 * gene regulation * glioblastoma cells Subject RIV: BO - Biophysics

  3. Teoretické přístupy a praktické formy řešení sociálně-ekonomických problémů nejméně rozvinutých zemí (LDCs)

    Harmáček, Jaromír

    2007-01-01

    The thesis focuses on theoretical and empirical analysis of economic growth and its implications for economic and social development of the Least Developed Countries (LDCs). The thesis proceeds from the assumption that economic growth is the necessary (but not sufficient) condition for economic, social and human development of societies and nations. In context of the LDCs, this assumption can be modified: it is assumed that it has been the low average rate of growth in the long-run that is as...

  4. 水蒸气法提取黑皮油松松针挥发油及GC/MS分析%Volatile Oil Extraction from Pinus tabulae formis var .mukdensis Uyeke Pine Needle by Vapor Method and Its GC-MS Analysis

    王得道; 朱玉; 刘洪章

    2013-01-01

      For the purpose of optimizing the extraction process of volatile oil from the Pinus tabulae f ormis var .mukdensis Uyeki pine needle and providing scientific basis for its further development ,the volatile oil was ex-tracted from the Pinus tabulae f ormis var .mukdensis Uyeki pine needle by vapor method .The effects of the particle sides ,ratio of material to liquid ,soaking time and extracting time on the extraction yield of volatile oil were studied through orthogonal experiment .Then ,the chemical constituents of volatile oil were analyzed by gas chromatography-mass spectrometry (GC-MS) .The results showed that the optimum conditions for extrac-ting the volatile oil from the Pinus tabulae f ormis var .mukdensis Uyeki pine needle :particle size was 100 ,ratio of material to liquid was 1∶16 ,soaking time was 16 h ,extracting time was 8 h ;Gas chromatography-mass spec-trometry technology identified 23 compounds ,accounting for 57 .84% of the total volatile oil ,including olefin tired accounted for 25 .13% ,12 .2% aromatic hydrocarbon ,lipid accounted for 9 .54% ,and a small amount of alcohol ,ester compounds .%  为优选黑皮油松挥发油的最佳提取条件,为黑皮油松松针的进一步综合开发利用提供科学依据,采用水蒸气蒸馏法提取马尾松松针挥发油,通过正交试验,研究颗粒大小、液料比、浸泡时间以及提取时间对黑皮油松松针挥发油提取得率的影响进行研究,并用气相色谱-质谱联用技术对其挥发油中化学成分进行分析。结果表明:黑皮油松最佳提取条件为颗粒大小100目,料液比1∶16,浸泡时间16 h ,提取时间8 h ;气相色谱-质谱联用技术从黑皮油松松针挥发油中鉴定出23种化合物,占挥发油总量的57.84%,其中烯烃类占25.13%,芳香烃占12.2%,脂类占9.54%,以及少量的醇、酯类化合物。

  5. Discrimination of press fit candidate microorganism (Enterobacter cloacae, Bacillus licheniformis) by restriction fragment length polymorphic analysis of the 16SrRNA gene; 16S rRNA idenshi no sengen danpen kchotakei kaiseki niyoru atsunyukoho biseibutsu (Enterobacter cloacae, Bacillus licheni-formis) no shikibetsu

    Fujiwara, Kazuhiro; Tanaka, Shinji; Otsuka, Makiko; Ichimura, Naoya; Yonebayashi, Eiji; Enomoto, Heiji

    1999-09-01

    In MeOH viewed as one of the improvement method for recovery of the petroleum with hope, the development of discrimination technique of press fit candidate microorganism and oil reservoir resident microorganism which exists in the test object oil reservoir was tried in order to monitor the survival situation of the microorganism which inserted in the oil reservoir under pressure. 16S rRNA amplified by the PCR using the universal primer The microorganism that it cut off the gene at restriction enzyme HhaI,MspI, AluI and inhabits oil reservoir water and oil reservoir rock in the object oil reservoir by ( necessarily TaqI ) and restriction fragment length polymorphic analysis was classified. As the result, the effectiveness of the this PCR-RFLP method was indicated the microorganism which showed RFLP pattern which is identical with the press fit candidate microorganism in the oil reservoir resident microorganism for the discrimination of the press fit candidate microorganism without existing. And, it was indicated that the this PCR-RFLP method was effective for the investigation of oil reservoir resident microbial community which can positively utilize source of nutrition inserted to oil reservoir with the press fit candidate microorganism under pressure, and it was possible to grasp oil reservoir resident microorganism to be especially considered in MEOR. (translated by NEDO)

  6. Neolitické osídlení v Černém Vole (Praha-západ). Formy objektů, keramika a štípaná industrie z výzkumů 1975-77 a 1914

    Řídký, Jaroslav; Stolz, D.; Zápotocká, Marie

    2009-01-01

    Roč. 28, - (2009), s. 177-236. ISSN 0231-5432 Institutional research plan: CEZ:AV0Z80020508 Keywords : Neolithic * pottery * chipped stone industry Subject RIV: AC - Archeology, Anthropology, Ethnology

  7. Formy komunikace doby husitské. Listy pražských obcí proti odběhlým měšťanům aneb vysoká hra o velké majetky

    Musílek, Martin

    Opava: European Social Fund, 2014, s. 151-162 ISBN 978-80-7510-109-9 R&D Projects: GA ČR(CZ) GAP405/11/1982 Institutional support: RVO:67985955 Keywords : Old Town Prague * confiscation * Hussite revolution * urban society * emigration Subject RIV: AB - History

  8. Formy zvětrávání skalního podloží v Průčelské rokli a Čertově jizbě v Českém středohoří

    Raška, P.; Cajz, Vladimír

    2008-01-01

    Roč. 2007, Prosinec (2008), s. 109-112. ISSN 0514-8057 Institutional research plan: CEZ:AV0Z30130516 Keywords : weathering forms * solid bedrock * palaeogeomorphology * České středohoří Mts. volcanic range Subject RIV: DB - Geology ; Mineralogy http://www. geology .cz/zpravy/obsah/2007/2007-30.pdf

  9. Elimination of Pathogenic Bacterium (Micrococcus sp.) by the Use of Probiotics

    , Tejpal Dahiya; , S. K. Gahlawat; R.C. Sihag

    2012-01-01

    Probiotics 1 (Lactobacillus sporogenes), 2 (Saccharomyces boulardii) and 3 (Nitromonas, Rhodococcus, Bacilus megaterium, Lecheni formis, Desulphovibrio sulphuricum, Psuedomonas, Chromatium, Chlorobium, Thiobacillus, Thioxidants, Thiobacilus ferroxidant, Methylomonas methyanica, Glucon acetobactor, Azospirillum, Trichoderma, Shizophyllum commune and Sclertium gluconicum) were tested against the pathogenic Micrococcus sp. oxt in vitro as well a...

  10. NCBI nr-aa BLAST: CBRC-TTRU-01-1252 [SEVENS

    Full Text Available CBRC-TTRU-01-1252 ref|YP_001130163.1| O-antigen polymerase [Prosthecochloris vibrio...formis DSM 265] gb|ABP36661.1| O-antigen polymerase [Chlorobium phaeovibrioides DSM 265] YP_001130163.1 0.002 27% ...

  11. NCBI nr-aa BLAST: CBRC-DRER-07-0095 [SEVENS

    Full Text Available CBRC-DRER-07-0095 ref|YP_001130163.1| O-antigen polymerase [Prosthecochloris vibrio...formis DSM 265] gb|ABP36661.1| O-antigen polymerase [Prosthecochloris vibrioformis DSM 265] YP_001130163.1 0.33 27% ...

  12. Triple-quantum filtered NMR imaging of sodium in the human brain

    Keltner, J.R.

    1993-04-01

    In the past multiple-quantum filtered imaging of biexponential relaxation sodium-23 nuclei in the human brain has been limited by low signal to noise ratios; this thesis demonstrates that such imaging is feasible when using a modified gradient-selected triple-quantum filter at a repetition time which maximizes the signal to noise ratio. Nuclear magnetic resonance imaging of biexponential relaxation sodium-23 ({sup 23}Na) nuclei in the human brain may be useful for detecting ischemia, cancer, and pathophysiology related to manic-depression. Conventional single-quantum NMR imaging of in vivo biexponential relaxation {sup 23}Na signals is complicated by the presence of single-exponential relaxation {sup 23}Na signals. Multiple-quantum filters may be used to selectively image biexponential relaxation {sup 23}Na signals since these filters suppress single-exponential relaxation {sup 23}Na signals. In this thesis, the typical repetition times (200--300 ms) used for in vivo multiple-quantum filtered {sup 23}Na experiments are shown to be approximately 5 times greater than the optimal repetition time which maximizes multiple-quantum filtered SNR. Calculations and experimental verification show that the gradient-selected triple-quantum (GS3Q) filtered SNR for {sup 23}Na in a 4% agarose gel increases by a factor of two as the repetition time decreases from 300 ms to 55 ms. The measured relaxation times of the {sup 23}Na in the 4% agarose gel were similar to in vivo {sup 23}Na relaxation times.

  13. Rodzina dotknięta przemocą – możliwości i formy pomocy na podstawie badań Specjalistycznych Ośrodków Wsparcia dla Ofiar Przemocy w Rodzinie w regionie dolnośląskim/ Violence Affected Family – Possibilities and Forms of Assistance Based on the Research of Specialist Centers of Support for Victims of Domestic Violence in the Region of Lower Silesia

    BEATA ŚWIĄTEK

    2011-01-01

    Full Text Available Family has always created an indispensable environment for a man to fulfill his needs and for his development. Family makes our lives meaningful, helps to put plans into practice and to assign goals. The need for belonging to a family constitutes a value dear to all communities. In the literature of the subject there exists a general division into functional and non-functional families. One of the factors determining a family's capability is violence. It influences the quality of the offspring upbringing, family relationships and bonds. In its air social competence of parents declines and their attitude to family-related responsibilities deteriorates. The issue of domestic violence is tackles by specialists of the area of law, psychology, sociology, pedagogy and medicine, who are studying sources and methods of fighting with this phenomenon. Its social damage is so devastating that its unambiguous definition is almost impossible. In the face of a serious threat generated by domestic violence in recent years, there have been held campaigns, workshops, local and nationwide conferences to promote assistance to violence-stricken victims. Preventive schemes have also been developed to restrain violence in schools and local community. Violence affected individuals can seek help in centers founded especially for this purpose and maintained by local councils (MOPS or county councils (PCPR, as well as non-government organizations and associations. A comprehensive support for families suffering from domestic violence is provided by Emergency Intervention Centers and Specialist Centers of Support for Victims of domestic Violence. In the region of Lower Silesia there exist two institutions of such a character, one inWroclaw and the other one in Walbrzych. Their activity involves therapeutic tasks, aid and provision for victims of domestic violence.

  14. Preparation and Crystallographic Analysis of Gliclazide Polymorphs

    Rajamma, A. J.; S B Sateesha; Narode, M. K.; V R S S Prashanth; A M Karthik

    2015-01-01

    Since the introduction of gliclazide in the pharmaceutical industry, a large number of research groups have been engaged in various investigations aiming to enhance its biomedical application. But, very limited efforts have been made to study polymorphism of gliclazide. Therefore, this study focuses on solvent-induced polymorphism of gliclazide and its characterization by thermal methods. Three polymorphs namely, Form-I, II and III and an amorphous powder were produced from different solvents...

  15. Preparation and crystallographic analysis of gliclazide polymorphs.

    Rajamma, A J; Sateesha, S B; Narode, M K; Prashanth, V R S S; Karthik, A M

    2015-01-01

    Since the introduction of gliclazide in the pharmaceutical industry, a large number of research groups have been engaged in various investigations aiming to enhance its biomedical application. But, very limited efforts have been made to study polymorphism of gliclazide. Therefore, this study focuses on solvent-induced polymorphism of gliclazide and its characterization by thermal methods. Three polymorphs namely, Form-I, II and III and an amorphous powder were produced from different solvents and solvent mixtures. Crystals were analyzed using infrared spectroscopy, differential scanning calorimetry, X-ray powder diffraction and single crystal x-ray diffraction. Polymorph Form-I is found to exist in centro-symmetric triclinic P-1 space group and has endothermic peak at 162.93°. Form-II has endothermic peak from 171.2° to 172.35° and exists in centro-symmetric monoclinic P21/a space group while Form-III has endothermic peak from 168.93° to 169.86° and exists in centro-symmetric monoclinic P21/n space group. The equilibrium solubility values of Form-I, II, III and the amorphous form were 0.4825±0.025, 0.2341±0.042, 0.2581±0.038 and 0.5213±0.072 mg/ml, respectively. The Form-I has relatively higher solubility and similar to that of amorphous gliclazide. Form-II and Form-III are relatively most stable and least soluble. However, there was no remarkable difference in their aqueous solubility under the conditions in which study was conducted. PMID:25767316

  16. Coastal polynyas in the southwestern Weddell Sea: ice production and bottom water formation

    Haid, Verena; Timmermann, Ralph; Ebner, Lars; Heinemann, Günther

    2011-01-01

    Coastal polynyas are areas in the ice-covered ocean from which the sea-ice cover has been mechanically removed, primarily by winds. They are areas of enhanced exchange processes between ocean and atmosphere. The increased heat flux allows for exceptionally high freezing rates, which lead to locally increased brine-rejection. In the southwestern Weddell Sea, wide continental shelves and a weak exchange with the open ocean provide conditions that allow for substantial salinity enrichment, formi...

  17. Doplňující informace k testamentu královny Žofie s přihlédnutím k pozůstalostnímu inventáři

    Kopičková, Božena

    Praha : Scriptorium, 2006 - (Jíšová, K.; Doležalová, E.), s. 121-137 ISBN 80-86852-11-3. [Pozdně středověké testamenty v českých zemích. Prameny, metodologie a formy využití. Praha (CZ), 30.11.2005] Institutional research plan: CEZ:AV0Z80150510 Keywords : history * middle ages * analysis of source Subject RIV: AB - History

  18. Back Street Bounty

    DAVID SPARKES

    2010-01-01

    @@ As soon as I stepped into the main street of the old city in Pingyao.Shanxi Province.I had a feeling I would not like the place.In fact.I basically made my mind up on the spot that I disliked it.It looked overly touristy.clichéd and lacking in the authenticity I was hoping for.My escape from Beijing's expat scene was looking shaky.

  19. Preparation and crystallographic analysis of gliclazide polymorphs

    A J Rajamma

    2015-01-01

    Full Text Available Since the introduction of gliclazide in the pharmaceutical industry, a large number of research groups have been engaged in various investigations aiming to enhance its biomedical application. But, very limited efforts have been made to study polymorphism of gliclazide. Therefore, this study focuses on solvent-induced polymorphism of gliclazide and its characterization by thermal methods. Three polymorphs namely, Form-I, II and III and an amorphous powder were produced from different solvents and solvent mixtures. Crystals were analyzed using infrared spectroscopy, differential scanning calorimetry, X-ray powder diffraction and single crystal x-ray diffraction. Polymorph Form-I is found to exist in centro-symmetric triclinic P-1 space group and has endothermic peak at 162.93°. Form-II has endothermic peak from 171.2° to 172.35° and exists in centro-symmetric monoclinic P2 1 /a space group while Form-III has endothermic peak from 168.93° to 169.86° and exists in centro-symmetric monoclinic P2 1 /n space group. The equilibrium solubility values of Form-I, II, III and the amorphous form were 0.4825±0.025, 0.2341±0.042, 0.2581±0.038 and 0.5213±0.072 mg/ml, respectively. The Form-I has relatively higher solubility and similar to that of amorphous gliclazide. Form-II and Form-III are relatively most stable and least soluble. However, there was no remarkable difference in their aqueous solubility under the conditions in which study was conducted.

  20. Český šlechtický testament pozdního středověku - reálné badatelské téma? (Prolegomena k výzkumnému záměru)

    Šimůnek, Robert

    Praha: Scriptorium, 2006 - (Jíšová, K.; Doležalová, E.), s. 95-115 ISBN 80-86197-72-7. [Pozdně středověké testamenty v českých zemích. Prameny, metodologie a formy využití. Praha (CZ), 30.11.2005] Institutional research plan: CEZ:AV0Z80150510 Keywords : history * Nobility * Last will Subject RIV: AB - History

  1. Rapid detection of malto-oligosaccharide-forming bacterial amylases by high performance anion-exchange chromatography

    Duedahl-Olesen, Lene; Larsen, K. L.; Zimmermann, W.

    2000-01-01

    High performance anion-exchange chromatography with pulsed amperometric detection was applied for the rapid analysis of malto-oligosaccharides formed by extracellular enzyme preparations from 49 starch-degrading bacterial strains isolated from soil and compost samples. Malto-oligosaccharide-formi......-oligosaccharide-forming amylases, indicated by a predominant formation of maltohexaose from starch, were produced by enzyme preparations from four of the isolates growing at pH 7.0 and 10....

  2. Zaključenje, punovažnost i dokazivanje elektronskih ugovora: komparativna analiza

    Trnavci, Genc

    2009-01-01

    Pravna regulacija transakcija elektronskim putem doživjela je pravi procvat u posljednje vrijeme. Usporedna zakonodavastva posebnu pažnju su posvetila problemima u vezi sa zaključivanjem elektronskih ugovora, odnosno postizanjem pravno relevantne suglasnosti prilikom njihovog zaključenja, dokazivanju postojanja i tumačenju sadržaja elektronskih ugovora i elektronskoj formi kao uvjetu punovažnosti ugovora. Zahtjevom primjene sigurnog (naprednog, kvalificiranog) elektronskog potpisa pravni prop...

  3. Spiral Ganglion Stem Cells Can Be Propagated and Differentiated Into Neurons and Glia

    Diensthuber, Marc; Zecha, Veronika; Wagenblast, Jens; Arnhold, Stefan; Albert S. B. Edge; Stöver, Timo

    2014-01-01

    Abstract The spiral ganglion is an essential functional component of the peripheral auditory system. Most types of hearing loss are associated with spiral ganglion cell degeneration which is irreversible due to the inner ear's lack of regenerative capacity. Recent studies revealed the existence of stem cells in the postnatal spiral ganglion, which gives rise to the hope that these cells might be useful for regenerative inner ear therapies. Here, we provide an in-depth analysis of sphere-formi...

  4. FORMULATION AND IN VITRO EVALUATION OF METOPROLOL SUCCINATE FLOATING TABLETS BY USING TWO VISCOSITY GRADE OF HPMC

    Shubhrajit Mantry et al

    2012-01-01

    Metoprolol is a beta1-selective (cardio selective) adrenergic receptor blocking agent used in the treatment of Hypertension. The purpose of this investigation is to improve bioavailability by preparing a gastroretentive drug delivery system. Floating tablets of Metoprolol Succinate were prepared by employing two different grades of HPMC K4M and HPMC E15M in different concentrations by effervescent granulation technique. These grades of HPMC K4M and HPMC E15M were evaluated for their gel formi...

  5. Využití elektronického marketingu

    Červená, Renata

    2007-01-01

    Obsahem bakalářské práce je analýza elektronického marketingu a jeho využití v internetovém prostředí. Základem je nalezení nejvýhodnější formy internetové reklamy a její srovnání s ostatními formami reklamy na Internetu.

  6. The Relationship with Self Esteem Between Assertiveness Levels of Sub-Elite In-Door Soccer Players

    Serdar SUCAN; TURAN, Mehmet Behzat; Osman PEPE; Doğan DOĞAN

    2015-01-01

    The aim of this study was investigated the relationship with self esteem between assertiveness levels of sub-elite in-door soccer players. For this aim, 18–28 aged, 86 male and 91 female athletes studying 7 universities which joined in-door soccer championship of Turkish University Sport Federation was participated to study volunteerly.Participants were performed socio- demographic data formi Rathus Assertiveness Schedule and Coopersmith Self-Esteem Inventory. Data were analyzed by using IBM ...

  7. Microcyle Conidiation in Filamentous Fungi

    Jung, Boknam; Kim, Soyeon; Lee, Jungkwan

    2014-01-01

    The typical life cycle of filamentous fungi commonly involves asexual sporulation after vegetative growth in response to environmental factors. The production of asexual spores is critical in the life cycle of most filamentous fungi. Normally, conidia are produced from vegetative hyphae (termed mycelia). However, fungal species subjected to stress conditions exhibit an extremely simplified asexual life cycle, in which the conidia that germinate directly generate further conidia, without formi...

  8. Activation methods of retrospective dosimetry using biological samples

    23Na and 32S are stable isotopes which are present in humans - 23Na in blood and other tissues, 32S in hair. When human body is irradiated by neutrons, nuclear reactions 23Na(n,γ)24Na and 32S(n,p)32P occur, the products, 24Na and 32P, being radioactive. The induced activity can be used for retrospective assessment of the neutron dose. The principle of this dosimetry application is described. As a particular case, the relations between the activity and neutron dose were derived for irradiation of a human by the fission neutron spectrum. (orig.)

  9. Study of the astrophysically important $\\boldsymbol{^{23}\\mathrm{Na}(\\alpha,p)^{26}\\mathrm{Mg}}$ and $\\boldsymbol{^{23}\\mathrm{Na}(\\alpha,n)^{26}\\mathrm{Al}}$ reactions

    Avila, M L; Almaraz-Calderon, S; Ayangeakaa, A D; Dickerson, C; Hoffman, C R; Jiang, C L; Kay, B P; Lai, J; Nusair, O; Pardo, R C; Santiago-Gonzalez, D; Talwar, R; Ugalde, C

    2016-01-01

    The $^{23}$Na$(\\alpha,p)^{26}$Mg and $^{23}$Na$(\\alpha,n)^{26}$Al reactions are important for our understanding of the $^{26}$Al abundance in massive stars. The aim of this work is to report on a direct and simultaneous measurement of these astrophysically important reactions using an active target system. The reactions were investigated in inverse kinematics using $^{4}$He as the active target gas in the detector. We measured the excitation functions in the energy range of about 2 to 6 MeV in the center of mass. We have found that the cross sections of the $^{23}$Na$(\\alpha,p)^{26}$Mg and the $^{23}$Na$(\\alpha,n)^{26}$Al reactions are in good agreement with previous experiments, and with statistical model calculations.

  10. The registration of signals from the nuclei other than protons at 0.5 T MRI scanner

    Anisimov, N.; Volkov, D.; Gulyaev, M.; Pavlova, O.; Pirogov, Yu

    2016-02-01

    The practical aspects of the adaptation of the medical MRI scanner for multinuclear applications are considered. Examples of high resolution NMR spectra for nuclei 19F, 31P, 23Na, 11B, 13C, 2H, and also NQR spectrum for 35Cl are given. Possibilities of MRI for nuclei 19F, 31P, 23Na, 11B are shown. Experiments on registration of signals 19F from the fluorocarbons injected in laboratory animals are described.

  11. Spectroscopic Studies with N-Chloroarylsulphonamides: IR and 1H, 13C and 23Na Nmr Spectra of Sodium Salts of N-Chloro-Mono- and Di-Substituted-Benzenesulphonamides, 4-X-C6H4SO2NANCl (X = H; CH3; C2H5; F; Cl; Br; I or NO2) and i-X, j-YC6H3SO2NANCl (i-X, j-Y = 2,3-(CH3)2; 2,4-(CH3)2; 2,5-(CH3)2; 2-CH3, 4-Cl; 2-CH3, 5-Cl; 3-CH3, 4-Cl; 2,4-Cl2 or 3,4-Cl2)

    Gowda; D'Souza, J. D.; Kumar, B. H. Arun

    2003-01-01

    In an effort to introduce N-chloroarylsulphonamides of different oxydising strengths, sixteen sodium salts of N-chloro-mono- and di-substituted benzenesulphonamides of the configuration, 4- X-C6H4SO2NaNCl (where X = H; CH3; C2H5; F; Cl; Br; I or NO2) and i-X, j-YC6H3SO2NaNCl (where i-X, j-Y = 2,3-(CH3)2; 2,4-(CH3)2; 2,5-(CH3)2; 2-CH3,4-Cl; 2-CH3,5-Cl; 3-CH3,4-Cl; 2,4- Cl2 or 3,4-Cl2) are prepared, characterized through their infrared spectra in the solid state and NMR spectra in solution. The υN-Cl frequencies vary in the range 950 - 927 cm-1. Effects of substitution in the benzene ring in terms of electron donating and electron withdrawing groups have been considered, and conclusions drawn. The chemical shifts of aromatic protons and carbon-13 in all the N-chloroarylsulphonamides have been calculated by adding substituent contributions to the shift of benzene. Considering the approximation employed the agreement between the calculated and experimental chemical shift values for different protons or carbon-13 is quite good. Effects of phenyl ring substitution on chemical shift values of both 1H and 13C are also graphically represented in terms of line diagrams.

  12. Sodium-23 MRI of whole spine at 3 Tesla using a 5-channel receive-only phased-array and a whole-body transmit resonator

    Sodium magnetic resonance imaging (23Na MRI) is a unique and non-invasive imaging technique which provides important information on cellular level about the tissue of the human body. Several applications for 23Na MRI were investigated with regard to the examination of the tissue viability and functionality for example in the brain, the heart or the breast. The 23Na MRI technique can also be integrated as a potential monitoring instrument after radiotherapy or chemotherapy. The main contribution in this work was the adaptation of 23Na MRI for spine imaging, which can provide essential information on the integrity of the intervertebral disks with respect to the early detection of disk degeneration. In this work, a transmit-only receive-only dual resonator system was designed and developed to cover the whole human spine using 23Na MRI and increase the receive sensitivity. The resonator system consisted of an already presented 23Na whole-body resonator and a newly developed 5-channel receive-only phased-array. The resonator system was first validated using bench top and phantom measurements. A threefold SNR improvement at the depth of the spine (∝7 cm) over the whole-body resonator was achieved using the spine array. 23Na MR measurements of the human spine using the transmit-only receive-only resonator system were performed on a healthy volunteer within an acquisition time of 10 minutes. A density adapted 3D radial sequence was chosen with 6 mm isotropic resolution, 49 ms repetition time and a short echo time of 540 μs. Furthermore, it was possible to quantify the tissue sodium concentration in the intervertebral discs in the lumbar region (120 ms repetition time) using this setup.

  13. Sodium-23 MRI of whole spine at 3 Tesla using a 5-channel receive-only phased-array and a whole-body transmit resonator

    Malzacher, Matthias; Kalayciyan, Raffi; Konstandin, Simon; Schad, Lothar R. [Heidelberg Univ., Mannheim (Germany). Computer Assisted Clinical Medicine; Haneder, Stefan [Heidelberg Univ., Mannheim (Germany). Clinical Radiology and Nuclear Medicine; University Hospital of Cologne, Koeln (Germany). Dept. of Radiology

    2016-05-01

    Sodium magnetic resonance imaging ({sup 23}Na MRI) is a unique and non-invasive imaging technique which provides important information on cellular level about the tissue of the human body. Several applications for {sup 23}Na MRI were investigated with regard to the examination of the tissue viability and functionality for example in the brain, the heart or the breast. The {sup 23}Na MRI technique can also be integrated as a potential monitoring instrument after radiotherapy or chemotherapy. The main contribution in this work was the adaptation of {sup 23}Na MRI for spine imaging, which can provide essential information on the integrity of the intervertebral disks with respect to the early detection of disk degeneration. In this work, a transmit-only receive-only dual resonator system was designed and developed to cover the whole human spine using {sup 23}Na MRI and increase the receive sensitivity. The resonator system consisted of an already presented {sup 23}Na whole-body resonator and a newly developed 5-channel receive-only phased-array. The resonator system was first validated using bench top and phantom measurements. A threefold SNR improvement at the depth of the spine (∝7 cm) over the whole-body resonator was achieved using the spine array. {sup 23}Na MR measurements of the human spine using the transmit-only receive-only resonator system were performed on a healthy volunteer within an acquisition time of 10 minutes. A density adapted 3D radial sequence was chosen with 6 mm isotropic resolution, 49 ms repetition time and a short echo time of 540 μs. Furthermore, it was possible to quantify the tissue sodium concentration in the intervertebral discs in the lumbar region (120 ms repetition time) using this setup.

  14. Whole body sodium MRI at 3T using an asymmetric birdcage resonator and short echo time sequence: first images of a male volunteer

    Sodium magnetic resonance imaging (23Na MRI) is a non-invasive technique which allows spatial resolution of the tissue sodium concentration (TSC) in the human body. TSC measurements could potentially serve to monitor early treatment success of chemotherapy on patients who suffer from whole body metastases. Yet, the acquisition of whole body sodium (23Na) images has been hampered so far by the lack of large resonators and the extremely low signal-to-noise ratio (SNR) achieved with existing resonator systems. In this study, a 23Na resonator was constructed for whole body 23Na MRI at 3T comprising of a 16-leg, asymmetrical birdcage structure with 34 cm height, 47.5 cm width and 50 cm length. The resonator was driven in quadrature mode and could be used either as a transceiver resonator or, since active decoupling was included, as a transmit-only resonator in conjunction with a receive-only (RO) surface resonator. The relative B1-field profile was simulated and measured on phantoms, and 3D whole body 23Na MRI data of a healthy male volunteer were acquired in five segments with a nominal isotropic resolution of (6 × 6 × 6) mm3 and a 10 min acquisition time per scan. The measured SNR values in the 23Na-MR images varied from 9 ± 2 in calf muscle, 15 ± 2 in brain tissue, 23 ± 2 in the prostate and up to 42 ± 5 in the vertebral discs. Arms, legs, knees and hands could also be resolved with applied resonator and short time-to-echo (TE) (0.5 ms) radial sequence. Up to fivefold SNR improvement was achieved through combining the birdcage with local RO surface coil. In conclusion, 23Na MRI of the entire human body provides sub-cm spatial resolution, which allows resolution of all major human body parts with a scan time of less than 60 min. (paper)

  15. Ples i upotreba droga kao značenjske prakse u sociologiji rave-kulture

    KRNIĆ, Rašeljka

    2013-01-01

    Potreba za modificiranjem ili odbacivanjem pojma subkulture javlja se početkom devedesetih, uglavnom kao reakcija na pojavu plesne elektronske glazbe i kulture koja oko nje nastaje. Upravo na tom primjeru postavlja se teza o promjenjivoj i kompleksnoj prirodi suvremenih mladenačkih kulturnih praksi, formi i stilova koji, da bi se razumjeli, zahtijevaju novu perspektivu i nove analitičke alate. Osim što su rave-kultura i različite scene elektronske glazbe poslužile kao “teren” n...

  16. Zagonetka nadolazećega događaja. Između vjere i tehno-znanosti (Heidegger i Deleuze)

    Paić, Žarko

    2014-01-01

    U članku se tematizira problem trijumfa tehno-znanosti u stvaranju umjetne inteligencije i umjetnoga života spram mišljenja suvremene filozofije. Autor pokazuje kako je tzv. svjetonazorni spor između »uma« i »vjere« u suočenju s pitanjem o ljudskoj egzisten- ciji u formi kibernetičkih sustava kaosa i kontrole ispod razine mišljenja primjerenoga suvremenosti. U ekstenzivnoj analizi mišljenja Heideggera i Deleuzea kao paradigmat- skih filozofa za pitanje o sudbini metafizike danas naglašava se ...

  17. Structure of the Sierra de Lujar (Alpujarride Complex, Betic Cordillera)

    Sanz de Galdeano, Carlos; López Garrido, Angel Carlos

    2014-01-01

    The Sierra de Lujar constitutes one of the best examples of fold superposition of the Internal Zone of the Betic Cordillera (S Spain). In this paper, the members of its Triassic carbonate series have been used for the first time to obtain the cartography of the Sierra de Lujar, providing knowledge of the two folding systems, the older trending E-W and the younger (far better represented), NNE-SSW. The most important fold is a large reverse syncline with a convex axis towards the SE, formi...

  18. Društveno-gospodarske reforme 1950-1952. i njihov odraz na upravu Narodne Republike Hrvatske

    Holjevac Tuković, Ana

    2004-01-01

    U članku su u kraćim crtama prikazane društveno-gospodarske prilike 1950-ih u Jugoslaviji, koje su uvjetovale provođenje niza reformi. Istaknute su glavne odrednice ideološko-političkih promjena uvjetovane pokušajima uvođenja samoupravljanja. Nadalje se analizira državna uprava i upravne reforme na saveznoj razini kao i njihov odraz na republike, odnosno upravu u Hrvatskoj. Posebno je naznačen proces napuštanja upravnih organizacijskih formi uspostavljenih u poslijeratnoj fazi državne uprave ...

  19. Transfer technologii a gospodarka

    Mączyński, Jacek

    2005-01-01

    Transfer technologii jest obecnie kluczem do konkurencyjności i rozwoju ekonomicznego państw. Już wiele lat temu tacy ekonomiści, jak Robert Solow i Joseph Schumpeter, uznali inwestowanie w nowe technologie i ich upowszechnianie za siłę napędową wzrostu gospodarczego. Transfer technologii wpływa na tempo i kierunki rozwoju gospodarczego, strukturę gospodarki, a także na powstawanie jej nowych gałęzi, w tym wysoko zaawansowanych technologicznie. Rynek technologii tworzy nowe formy walki konkur...

  20. Dynamika tożsamości instytucjonalnej wyrażana w zachowaniach komunikacyjnych wewnętrznych i zewnętrznych komunikatorów

    Krawczak, Marcin

    2014-01-01

    Wydział Neofilologii: Katedra Ekokomunikacji Instytucje stanowią najdoskonalsze formy społecznej organizacji, które zostały powołane do sfery publicznej w celu realizowania specyficznych funkcji. Niniejsza dysertacja zmierza do określenia dynamiki instytucjonalnej tożsamości wyrażanej przez wewnętrznych i zewnętrznych komunikatorów w zachowaniach komunikacyjnych. Kolektywna aktywność instytucji jest osiągalna dzięki działalności wyżej wymienionych komunikatorów tj. ludzkich agensów komunik...

  1. Bis{2-[1-(8-hydroxy-2-quinolylmethyl)-1H-benzimidazol-2-yl]quinolin-8-ol} toluene solvate

    Qing-Ming Wang; Qi Ma; Hui-Li Chen

    2010-01-01

    Crystals of the title compound, 2C26H18N4O2·C7H8, were obtained from the reaction of 8-hydroxyquinoline with 1,2-phenylenediamine in methanol and recrystallized from toluene. The compound contains three essentially planar ring systems: the benzimidazole ring (r.m.s. deviation = 0.039 Å) and two 8-hydroxyquinoline rings (r.m.s. deviations of 0.0056 Å in both rings). The benzimidazole ring and one 8-hydroxyquinoline ring are almost co-planar, formi...

  2. 各向异性网格下具有数值积分的非协调有限元逼近%Nonconforming Finite Element Approximation on Anisotropic Meshes with Numerical Quadrature

    杨乔; 石东洋

    2006-01-01

    In this paper we mainly discuss the nonconforming finite element method for second order elliptic boundary value problems on anisotropic meshes. By changing the discretization form(i.e., by use of numerical quadrature in the procedure of computing the left load ), we obtain the optimal estimate O(h), which is as same as in the traditional finite element analysis when the load f∈H1(Ω)∩C0(Ω) which is weaker than the previous studies. The results obtained in this paper are also valid to the conforming triangular element and nonconforming Carey's element.

  3. Obytné prostředí v území postiženém útlumem těžby (na příkladu Ostravska)

    Kallabová, Eva; Pokluda, František

    Olomouc : Univerzita Palackého v Olomouci, Katedra geografie Přírodovědecké fakulty, 2004 - (Fňukal, M.; Szczyrba, Z.), s. 103-111 ISBN 80-2440937-2. [Bydlení – nové formy a dimenze. Olomouc (CZ), 23.06.2004] R&D Projects: GA AV ČR(CZ) KSK3046108 Institutional research plan: CEZ:AV0Z3086906 Keywords : inhibition of underground mining * dwelling environment * Ostrava region * land use Subject RIV: DE - Earth Magnetism, Geodesy, Geography

  4. Primjena informacijske i komunikacijske tehnologije (ICT) u slovenskom obrazovnom sustavu

    Gerlič, Ivan

    2006-01-01

    Istraživački projekt Didaktički aspekti primjene informacijske i komunikacijske tehnologije (ICT) – učenje i vježbanje pokriva slijedeće teme: analiza ICT-a, kreiranje i određivanje didaktičkih aspekata ICT-a u slovenskom obrazovnom sustavu, kreiranje i određivanje didaktičkih formi, metoda, pristupa, modela informacijske i komunikacijske tehnologije u obrazovanju i vježbanju, njihove praktične vrijednosti te kompatibilnost sa suvremenim ciljevima obrazovnih sustava.

  5. Stare nje i (ne)moć. U povodu 100. obljetnice rođenja Simone de Beauvoir

    Polić, Rajka

    2009-01-01

    Na pragu starosti, sa šezdeset godina, Simone de Beauvoir piše o egzistencijalnim pitanjima starih ljudi. Svojom knjigom Starost pokušava razriješiti dvojbe koje se emancipiranoj osobi starenjem nezaobilazno postavljaju. Starost je nužnost dugog života za koju nismo dovoljno pripremljeni pa je Simone de Beauvoir temu obuhvatila kao antropološko, ekonomsko, sociološko, povijesno, političko i civilizacijsko pitanje. Napisana u formi eseja, knjiga je obilato protkana osobnošću autorice. Pišuć...

  6. You can be a wizard of IDS. Is your practice ready to form an integrated delivery system?

    Fabrizio, Nick A

    2007-09-01

    To combat declining reimbursement and strengthen their positions in a highly competitive provider environment, leaders of large medical groups may consider forming an integrate delivery system (IDS) to gain a business advantage. Managing the array of organizational, operational, financial and human relationships affected by an IDS requires careful planning, good timing and a bit of luck. This article, the first of a two-part series, examines what questions physician practice leaders should ask--and answer--before formiing an IDS. PMID:17910216

  7. Pravna kultura srednjovjekovne Dalmacije između usmenosti i pismenosti

    Lonza, Nella

    2013-01-01

    Analizom izvorne građe, uz primjenu komparativnih i teorijskih saznanja, autorica razmatra proces širenja pisanih oblika u privatnopravnim poslovima, sudskom postupku i normativnim oblicima u srednjovjekovnoj Dalmaciji. Revidirajući neka uvriježena shvaćanja u pravnopovijesnoj literaturi, analizira prijelazne faze i rani “suživot” usmenih i pisanih pravnih formi, vrijeme oblikovanja “pisanog standarda” te katalizatore tog procesa. Također prikazuje strategije stranaka u korištenju pisanih pra...

  8. Structural and mechanistic investigations on Salmonella typhimurium acetate kinase (AckA: identification of a putative ligand binding pocket at the dimeric interface

    Chittori Sagar

    2012-10-01

    Full Text Available Abstract Background Bacteria such as Escherichia coli and Salmonella typhimurium can utilize acetate as the sole source of carbon and energy. Acetate kinase (AckA and phosphotransacetylase (Pta, key enzymes of acetate utilization pathway, regulate flux of metabolites in glycolysis, gluconeogenesis, TCA cycle, glyoxylate bypass and fatty acid metabolism. Results Here we report kinetic characterization of S. typhimurium AckA (StAckA and structures of its unliganded (Form-I, 2.70 Å resolution and citrate-bound (Form-II, 1.90 Å resolution forms. The enzyme showed broad substrate specificity with kcat/Km in the order of acetate > propionate > formate. Further, the Km for acetyl-phosphate was significantly lower than for acetate and the enzyme could catalyze the reverse reaction (i.e. ATP synthesis more efficiently. ATP and Mg2+ could be substituted by other nucleoside 5′-triphosphates (GTP, UTP and CTP and divalent cations (Mn2+ and Co2+, respectively. Form-I StAckA represents the first structural report of an unliganded AckA. StAckA protomer consists of two domains with characteristic βββαβαβα topology of ASKHA superfamily of proteins. These domains adopt an intermediate conformation compared to that of open and closed forms of ligand-bound Methanosarcina thermophila AckA (MtAckA. Spectroscopic and structural analyses of StAckA further suggested occurrence of inter-domain motion upon ligand-binding. Unexpectedly, Form-II StAckA structure showed a drastic change in the conformation of residues 230–300 compared to that of Form-I. Further investigation revealed electron density corresponding to a citrate molecule in a pocket located at the dimeric interface of Form-II StAckA. Interestingly, a similar dimeric interface pocket lined with largely conserved residues could be identified in Form-I StAckA as well as in other enzymes homologous to AckA suggesting that ligand binding at this pocket may influence the function of these

  9. Capitolo III. Fenomeni religiosi all’origine della pittura rupestre

    Piazza, Simone

    2013-01-01

    1– L’eremitismo Il portico della basilica di Sant’Angelo in Formis conserva un breve ciclo pittorico del xii secolo che narra la vita dell’eremita Paolo di Tebe, nato all’inizio del iii secolo (tav. 51 a). Nelle quattro lunette ai lati della porta d’ingresso è raccontato l’incontro che, all’età di centotredici anni, secondo quanto tramandato da san Girolamo, il venerando Paolo avrebbe avuto con il monaco novantenne Antonio venuto in visita presso la sua dimora, una grotta nel deserto della Te...

  10. Terroryzm współczesny zagrożeniem o charakterze globalnym

    Żuber, Marian

    2006-01-01

    Autor prezentuje terroryzm współczesny, jako zagrożenie o charakterze globalnym. Omawia cele terroryzmu współczesnego wykorzystywanego przez słabszych wobec silniejszych przeciwników. Zwraca uwagę na trudności w definiowaniu samego zjawiska, co wynika z braku jednolitych kryteriów pozwalających na określenie jednoznacznej definicji. następnie krótko charakteryzuje różnorodne formy działań o charakterze terrorystycznym, odbiegajace od terroryzmu konwencjonalnego (agroterroryzm, cyberterroryzm,...

  11. Have Library Symbols Been Changed by Cultural Differences? A Comparative Study of the Example of the Logos of Libraries

    Anameriç, Hakan; Kruszewski, Tomasz

    2014-01-01

    Pierwotna wersja arykułu została wygłoszona w formie referatu podczas: 5th International Conference on Qualitative and Quantitative Methods in Libraries 4 - 7 June 2013, "La Sapienza" University, Rome Italy. Artykuł złożono do druku u organizatora konferencji. This article analyses some visual artifacts which are using by libraries. Due to the spaciousness of the topic they focused on two of the main and popular artifacts: the watchwords and the logos of libraries from two cultural areas, ...

  12. Nejnovější účinné látky přírodního původu pro anti-aging kosmetiku

    Fleková, Andrea

    2014-01-01

    Tato diplomová práce studuje problematiku vybraných moderních anti-aging látek v kosmetických prostředcích. V literární rešerši byly popsány základní vlastnosti kůže a faktory ovlivňující její stárnutí. Dále byly popsány základní fyzikální formy kosmetických prostředků, základní kosmetické suroviny a nejnovější trendy v použití anti-aging látek. V experimentální části byly připraveny celkem čtyři fyzikální formy kosmetických prostředků – tonika, séra, masky a krémy. V této práci byly testován...

  13. Calculation of the elastic collision properties of Na and Li atoms at ultracold temperature

    Zhang Ji-Cai; Zhang Ying; Du Bing-Ge; Sun Jin-Feng

    2009-01-01

    This paper firstly reports a theoretical study of elastic scattering properties in a mixture of 23Na and 7Li atoms at cold and ultracold temperatures in detail.Based on the new constructed accurate singlet X1∑+g and the triplet a3∑+u states interatomic potentials for 23Na7Li mixture,it calculates the scattering lengths and the effective ranges by three computational methods,and obtains good agreements.Using the mass scaling method,it also calculates 23Na6Li scattering lengths and s-wave and total elastic cross sections,whose rich resonance structures were found and interpreted in terms of quasibound diatomic levels trapped behind a centrifugal barrier.

  14. A study of triton radiative capture in some light nuclei

    The aim of this work is to complete the knowledge of the nucleon Giant Dipole Resonance (G.D.R.) by means of the study of radiative capture of complex particles: tritons. The following reactions were studied: 12C(t,γ0)15N, 16O(t,γ)19F, 20Ne(t,γ)23Na, 24Mg(t,γ0)27Al, 24Mg(t,γ1)27Al*, 23Na(t,γ0)26Mg, 23Na(t,γ)26Mg* between between 1.5 and 3.5MeV incident triton energy. The detector was a 25x30cm NaI(Tl) crystal

  15. Sodium MRI in human heart: a review.

    Bottomley, Paul A

    2016-02-01

    This paper offers a critical review of the properties, methods and potential clinical application of sodium ((23)Na) MRI in human heart. Because the tissue sodium concentration (TSC) in heart is about ~40 µmol/g wet weight, and the (23)Na gyromagnetic ratio and sensitivity are respectively about one-quarter and one-11th of that of hydrogen ((1)H), the signal-to-noise ratio of (23)Na MRI in the heart is about one-6000th of that of conventional cardiac (1)H MRI. In addition, as a quadrupolar nucleus, (23)Na exhibits ultra-short and multi-component relaxation behavior (T1 ~ 30 ms; T2 ~ 0.5-4 ms and 12-20 ms), which requires fast, specialized, ultra-short echo-time MRI sequences, especially for quantifying TSC. Cardiac (23)Na MRI studies from 1.5 to 7 T measure a volume-weighted sum of intra- and extra-cellular components present at cytosolic concentrations of 10-15 mM and 135-150 mM in healthy tissue, respectively, at a spatial resolution of about 0.1-1 ml in 10 min or so. Currently, intra- and extra-cellular sodium cannot be unambiguously resolved without the use of potentially toxic shift reagents. Nevertheless, increases in TSC attributable to an influx of intra-cellular sodium and/or increased extra-cellular volume have been demonstrated in human myocardial infarction consistent with prior animal studies, and arguably might also be seen in future studies of ischemia and cardiomyopathies--especially those involving defects in sodium transport. While technical implementation remains a hurdle, a central question for clinical use is whether cardiac (23)Na MRI can deliver useful information unobtainable by other more convenient methods, including (1)H MRI. PMID:25683054

  16. Measurements of gamma rays from keV-neutron resonance capture by odd-Z nuclei in the 2s-1d shell region

    Igashira, Masayuki; Lee, Sam Yol; Mizuno, Satoshi; Hori, Jun-ichi [Tokyo Inst. of Tech. (Japan). Research Lab. for Nuclear Reactors; Kitazawa, Hideo

    1998-03-01

    Measurements of gamma rays from keV-neutron resonance capture by {sup 19}F, {sup 23}Na, and {sup 27}Al, which are odd-Z nuclei in the 2s-1d shell region, were performed, using an anti-Compton HPGe spectrometer and a pulsed neutron source by the {sup 7}Li(p,n){sup 7}Be reaction. Capture gamma rays from the 27-, 49-, and 97-keV resonances of {sup 19}F, the 35- and 53-keV resonances of {sup 23}Na, and the 35-keV resonance of {sup 27}Al were observed. Some results are presented. (author)

  17. A polarized alkali ion source

    The beam foil technique has been applied to detect nuclear vector polarization of a 10 keV 23Na+ beam. The result was about 70% of the atomic beam polarization thus limiting the depolarization by the surface ionizer to at most 30%. In a Coulomb excitation experiment with a tensor polarized 42 MeV 23Na7+ beam an effect of 0.011 +- 0.003 was measured yielding a value of t20 approx. 0.04 for the beam polarization. The depolarization during the acceleration process can be estimated to be about 0.8. (orig.)

  18. The potential of the ground state of NaRb

    Docenko, O; Ferber, R; Pashov, A; Knoeckel, H; Tiemann, E

    2003-01-01

    The X$^{1}\\Sigma ^{+}$ state of NaRb was studied by Fourier transform spectroscopy. An accurate potential energy curve was derived from more than 8800 transitions in isotopomers $^{23}$Na$^{85}$Rb and $^{23}$Na$^{87}$Rb. This potential reproduces the experimental observations within their uncertainties of 0.003 \\rcm to 0.007 \\rcm. The outer classical turning point of the last observed energy level ($v''=76$, $J''=27$) lies at $\\approx 12.4$ \\AA, leading to a energy of 4.5 \\rcm below the ground state asymptote.

  19. Optimal nuclear magnetic resonance excitation schemes for the central transition of a spin 3/2 in the presence of residual quadrupolar coupling.

    Lee, Jae-Seung; Regatte, Ravinder R; Jerschow, Alexej

    2008-12-14

    Optimal control theory is applied for enhancing the intensity of the central peak of a spin 3/2 signal in the presence of a residual quadrupolar coupling. While a maximum enhancement is always possible in the regime omega(rf) control and test these with (23)Na NMR in this regime. In addition to enhancing the intensity of the central transition signal, the satellite peaks can be effectively suppressed, which is a useful feature for the implementation in (23)Na imaging sequences. PMID:19071931

  20. Optical pumping effect in absorption imaging of F=1 atomic gases

    Kim, Sooshin; Noh, Heung-Ryoul; Shin, Y

    2016-01-01

    We report our study of the optical pumping effect in absorption imaging of $^{23}$Na atoms in the $F=1$ hyperfine spin states. Solving a set of rate equations for the spin populations under a probe beam, we obtain an analytic expression for the optical signal of the $F=1$ absorption imaging. Furthermore, we verify the result by measuring the absorption spectra of $^{23}$Na Bose-Einstein condensates prepared in various spin states with different probe beam pulse durations. The analytic result can be used in quantitative analysis of $F=1$ spinor condensate imaging and readily applied to other alkali atoms with $I=3/2$ nuclear spin such as $^{87}$Rb.

  1. A Practical Multinuclear Transceiver Volume Coil for in-vivo MRI/MRS at 7T

    Wang, Chunsheng; Li, Ye; Wu, Bing; Xu, Duan; Nelson, Sarah; Daniel B Vigneron; Zhang, Xiaoliang

    2011-01-01

    A practical multinuclear transceiver RF volume coil with improved efficiency for in-vivo small animal 1H/13C/23Na MR applications at the ultrahigh magnetic field of 7T is reported. In the proposed design, the coil’s resonance frequencies for 1H and 13C are realized by using a traditional double-tuned approach while the resonant frequency for 23Na, which is only some 4-MHz away from the 13C frequency, is tuned based upon 13C channel by easy-operating capacitive “frequency switches”. In contras...

  2. Nuclear physics research. Progress report, April 1, 1984-March 31, 1985

    Reaction products arising from the interaction of 11B + 12C and 10B + 13C have been studied in the energy range 4 23Na excitation energy of 60 MeV. Above this excitation energy, the experimental uncertainties make this point less clear. Up to an excitation energy of 60 MeV in 23Na, a fusion limitation based on reaching a critical density of compound nucleus states like the yrast or statistical yrast line can not be responsible for the fusion cross section limitations observed for these entrance channels. The present data suggests that competing entrance channel processes are responsible for the observed fusion cross section limitations

  3. 't Hooft-Polyakov monopoles in an antiferromagnetic Bose-Einstein condensate

    Stoof, H.T.C.; Vliegen, E.; Al Khawaja, U.

    2001-01-01

    We show that an antiferromagnetic spin-1 Bose-Einstein condensate, which can for instance be created with 23-Na atoms in an optical trap, has not only singular line-like vortex excitations, but also allows for singular point-like topological excitations, i.e., 't Hooft-Polyakov monopoles. We discuss the static and dynamic properties of these monopoles.

  4. Evaluation of sodium-23 neutron capture cross section data for the ENDF/B V-III file

    The evaluation of neutron cross sections of 23Na, material number 1156, for the ENDF/B File is described. Cross sections were evaluated between 10-5 eV and 15 MeV. Experimental data available up to March 1971 were included in the evaluation

  5. Study of $\\boldsymbol{(\\alpha,p)}$ and $\\boldsymbol{(\\alpha,n)}$ reactions with a Multi-Sampling Ionization Chamber

    Avila, M L; Almaraz-Calderon, S; Ayangeakaa, A D; Dickerson, C; Hoffman, C R; Jiang, C L; Kay, B P; Lai, J; Nusair, O; Pardo, R C; Santiago-Gonzalez, D; Talwar, R; Ugalde, C

    2016-01-01

    A large number of $(\\alpha,p)$ and $(\\alpha,n)$ reactions are known to play a fundamental role in nuclear astrophysics. This work presents a novel technique to study these reactions with the active target system MUSIC whose segmented anode allows the investigation of a large energy range of the excitation function with a single beam energy. In order to verify the method, we performed a direct measurements of the previously measured reactions $^{17}$O$(\\alpha,n)^{20}$Ne, $^{23}$Na$(\\alpha,p)^{26}$Mg, and $^{23}$Na$(\\alpha,n)^{26}$Al. These reactions were investigated in inverse kinematics using $^{4}$He gas in the detector to study the excitation function in the range of about 2 to 6 MeV in the center of mass. We found good agreement between the cross sections of the $^{17}$O$(\\alpha,n)^{20}$Ne reaction measured in this work and previous measurements. Furthermore we have successfully performed a simultaneous measurement of the $^{23}$Na$(\\alpha,p)^{26}$Mg and $^{23}$Na$(\\alpha,n)^{26}$Al reactions.

  6. Sodium MRI of the human heart at 7.0 T: preliminary results.

    Graessl, Andreas; Ruehle, Anjuli; Waiczies, Helmar; Resetar, Ana; Hoffmann, Stefan H; Rieger, Jan; Wetterling, Friedrich; Winter, Lukas; Nagel, Armin M; Niendorf, Thoralf

    2015-08-01

    The objective of this work was to examine the feasibility of three-dimensional (3D) and whole heart coverage (23)Na cardiac MRI at 7.0 T including single-cardiac-phase and cinematic (cine) regimes. A four-channel transceiver RF coil array tailored for (23)Na MRI of the heart at 7.0 T (f = 78.5 MHz) is proposed. An integrated bow-tie antenna building block is used for (1)H MR to support shimming, localization and planning in a clinical workflow. Signal absorption rate simulations and assessment of RF power deposition were performed to meet the RF safety requirements. (23) Na cardiac MR was conducted in an in vivo feasibility study. 3D gradient echo (GRE) imaging in conjunction with Cartesian phase encoding (total acquisition time T(AQ)  = 6 min 16 s) and whole heart coverage imaging employing a density-adapted 3D radial acquisition technique (T(AQ)  = 18 min 20 s) were used. For 3D GRE-based (23)Na MRI, acquisition of standard views of the heart using a nominal in-plane resolution of (5.0 × 5.0) mm(2) and a slice thickness of 15 mm were feasible. For whole heart coverage 3D density-adapted radial (23)Na acquisitions a nominal isotropic spatial resolution of 6 mm was accomplished. This improvement versus 3D conventional GRE acquisitions reduced partial volume effects along the slice direction and enabled retrospective image reconstruction of standard or arbitrary views of the heart. Sodium cine imaging capabilities were achieved with the proposed RF coil configuration in conjunction with 3D radial acquisitions and cardiac gating. Cardiac-gated reconstruction provided an enhancement in blood-myocardium contrast of 20% versus the same data reconstructed without cardiac gating. The proposed transceiver array enables (23)Na MR of the human heart at 7.0 T within clinical acceptable scan times. This capability is in positive alignment with the needs of explorations that are designed to examine the potential of (23)Na MRI for the assessment of cardiovascular and

  7. Validation of the sodium void reactivity effect prediction using JEFF-3.1 nuclear data

    Tommasi, J., E-mail: jean.tommasi@cea.f [CEA, DEN, CEA-Cadarache, DER/SPRC Bldg, 230, 13108 Saint Paul lez Durance (France); Archier, P.; Ruggieri, J.M. [CEA, DEN, CEA-Cadarache, DER/SPRC Bldg, 230, 13108 Saint Paul lez Durance (France)

    2010-11-15

    Near 60 Na void experiments performed in the zero power reactors MASURCA (CEA-Cadarache) and ZPPR (Argonne West - Idaho) have been analyzed using JEFF-3.1 nuclear data and the ERANOS-2.1 (deterministic) and TRIPOLI-4 (Monte-Carlo) codes. Some comparative calculations have been performed also using either JEFF-3.1, ENDF/B-VII.0 or JENDL-3.3 nuclear data for {sup 23}Na, as these three {sup 23}Na evaluations show marked differences. The Na void experiments have been selected to cover spectral conditions ranging from the relatively hard flux in the outer zone of a small fast reactor to the relatively soft flux in the inner zone of a large fast reactor. For in-fuel Na void patterns, there is a good agreement between ERANOS and TRIPOLI computations, while the deterministic calculations significantly underestimate the leakage component for Na void patterns in fertile regions. The agreement between ERANOS-2.1 + JEFF-3.1 predictions and experimental values is excellent for in-fuel Na void patterns in MASURCA experiments, but a significant underestimation of the leakage component occurs for in-fuel Na void patterns in ZPPR. For fertile Na void patterns, there is a clear underestimation of the leakage component, quantitatively different for MASURCA and ZPPR experiments. Variations in {sup 23}Na cross-section data also result in significant differences: ENDF/B-VII.0 and JENDL-3.3 nuclear data for {sup 23}Na increase noticeably the predicted Na void worth values with respect to JEFF-3.1 data. The three {sup 23}Na evaluations differ at high energy (>500 keV, and especially >2 MeV), and this stresses the need for accurate additional measurements in this energy range.

  8. Model e-marketingu pro firmu SSK Třinec, a.s.

    Klusová, Alena

    2007-01-01

    Tato práce je zaměřena na marketing, internet a zejména na spojení marketingu a internetu, tzv. elektronický marketing. V teoretické části je popsán marketing, formy elektronického marketingu a nejrozsáhlejší forma elektronického marketingu, což je webová prezentace. Praktická část je v prvé řadě věnována charakteristice společnosti S.S.K., a.s., dále analýze webové prezentace společnosti a návrhu nového webu společnosti.

  9. Effects of phosphorous fertilizer on seedlings growth and nodulation capabilities of some popular agroforestry tree species of Bangladesh

    Mohammad Belal Uddin; Sharif Ahmed Mukul; Mohammed Abu Sayed Arfin Khan; Mohammed Kamal Hossain

    2007-01-01

    An experiment was conducted to assess the effect of Phosphorous (P) fertilizer (I.e. TSP or triple super phosphate @ 80 kg/hm2) on seedling growth and nodulation capabilities of three potentially important agroforestry tree species (Acacia auriculiformis, Albizia lebbeck and Albizia procera) of Bangladesh. The study was conducted in nursery beds with six-month-old polybag seedlings of A. Auriculi formis, A. Lebbeck and A. Procera. The effects of P fertilizer on seedling growth and nodulation were compared with that of the seedlings grown in control (I.e. Unfertilized soil). The observations revealed that the seedling growth was enhanced significantly with the application of P fertilizer.hegrowth was found more pronounced in A. Auriculiformis, whereas it was not apparent and shows depressed growth in case of A. Lebbeck. The study also suggests that the nodulation in terms of nodule number and size was also increased significantly with the application of P fertilizer.

  10. Branding vlastní značky s přesahem do obalového designu

    Domorád, Petr

    2016-01-01

    Tato diplomová práce se zabývá vývojem mé vlastní značky, především definováním základních a důležitých informací v daném tématu. Představí vývoj vlastní značky, její jméno, logo, barevnost, charakter a vizuální formy. Stěžejním prvkem jsou sítotiskem tištěné prototypy papírových produktů a jejich prezentace na webu. This thesis deals with the development of my own brand, primarily by defining the basic and important information on the topic. Introduces the development of their own brand, ...

  11. Der Slogan - sprachliche Merkmale und Strategien

    Jońca, Anna Magdalena

    2000-01-01

    Artykuł poświęcony został relewantnym cechom języka reklamy. Już we wstępie autorka stwierdza, że obszerne przedstawienie języka reklamy jest utrudnione poprzez splot cech werbalnych i pozajęzykowych badanych tekstów. W celu przedstawienia najistotniejszych elementów definicji sloganu powołano się na wybrane wyniki badań Ruth Romer, Volkera Klotza, Nigela Forstera czy też Yahya Hassana Bajwy. Omawiając funkcje języka w sloganie jako ważnej formy werbalnej tekstów reklamowych...

  12. Dicty_cDB: Contig-U16142-1 [Dicty_cDB

    Full Text Available formis cDNA, cleaving embryo clone:m... 50 0.20 1 ( FL483265 ) ScMD-4C3 suppressive subtractive hybridization... %: nuclear 24.0 %: mitochondrial 20.0 %: cytoplasmic >> prediction for Contig-U16142-1 is nuc VS (DIR, S) 1..... 46 3.2 1 ( AM989984 ) Zygosaccharomyces rouxii strain CBS 732 Contig5. 46 3.2 1 ( AL161559 ) Arabidopsis thalia...Nam... 78 6e-17 AY896243_1( AY896243 |pid:none) Trichomonas vaginalis strain G3 sm... 80 6e-17 BT076341_1( BT076341 |pid:none) Cali...se: 8402 Lambda K H 1.37 0.711 1.31 Gapped Lambda K H 1.37 0.711 1.31 Matrix: blastn matrix:1 -3 Gap Penalties: Exist

  13. Gŭqín (古琴) – muzyczny instrument filozofów. W jaki sposób gra na gu qin i słuchanie muzyki na nim wykonywanej prowadzi do mądrości?

    Mazur, Rafał

    2013-01-01

    Gŭqín, starożytny, chiński instrument strunowy sam w sobie jest zjawiskiem niezwykłym. Prawdopodobnie jest najstarszym instrumentem solowym, zachowanym do naszych czasów w formie nie zmienionej, co najmniej od 2500 lat. Wraz z upływem czasu instrument i muzyka na nim wykonywana obrosły w symbolikę nadającą sztuce gry na gŭqín wymiar kosmologiczny i filozoficzny. Gŭqín stał się jednym z atrybutów chińskiego mędrca-filozofa, a zrozumienie znaczenia instrumentu stało się obowiązkowym elementem w...

  14. Vyhledávání objektu v digitálních snímcích

    Šramko, Samuel

    2011-01-01

    Tato práce se venuje detekci objektu v digitálních snímcích. Popisuje teoretické predpokladyk vyhledávání pomocí algoritmu template matching a SURF a jejich následné využití prirešení korespondencního problému. Dále se práce venuje návrhu, implementaci a testováníaplikace využívající zmínené algoritmy v jazyku C++ za využití knihoven OpenCV a Qt.Na záver popisuje formy testování a shrnuje získané výsledky. This work deals with pattern matching in digital images. It describes theoretical pr...

  15. Wybrane Aspekty Zużywania Się Połączeń Wpustowych I Wielowypustowych W Procesie Eksploatacji

    Gębura Andrzej

    2014-12-01

    Full Text Available W artykule przedstawiono wybrane wady połączeń wielowypustowych: mimośrodowości, przekoszenia, zwiększonych luzów. Przedstawiono znaczenie tych wad dla poprawności funkcjonowania całego zespołu napędowego. Zaprezentowano swoisty katalog tych wad w formie: wizualnego zużycia, pomiarów mechanicznych płaszczyzn przyporu, opisu matematycznego przebiegów dynamiki ruchu takiego połączenia, zobrazowań dla metod FAM-C i FDM-A. Zaznaczono skutki długotrwałej eksploatacji połączeń wielowypustowych o nadmiernym zużyciu dla bezpieczeństwa latania

  16. Finanční optimalizace dovozu zboží do tuzemska v režimu volného oběhu z pohledu deklaranta

    Sobotová, Dagmar

    2007-01-01

    Bakalářská práce si klade za hlavní cíl optimalizaci finanční nákladovosti dovozu zboží ze třetích zemí do tuzemska z pohledu deklaranta. Při dosahování tohoto cíle vycházím z metod výpočtu celní hodnoty a z mezinárodních dodacích podmínek INCOTERMS 2000. Závěr učiněný v mé práci potvrzuje, že je možné docílit určité formy finanční optimalizace dovozu zboží pro deklaranta.

  17. Franchising ako jedna z možných foriem vstupu podniku na medzinárodné trhy

    Telgárska, Lýdia

    2006-01-01

    Práca pojednáva o franchisingu zo všeobecného hľadiska, to znamená teoretické vymedzenie, hlavné rysy franchisingu a výhody a nevýhody tejto formy podnikania. Ďalej sa zaoberá franchisingovými zmluvami, postupom ich uzatvárania a vzťahmi, ktoré vznikajú medzi poskytovateľom a príjemcom franšízy. Taktiež sa v nej rozoberajú špecifické rysy medzinárodného franchisingu a v neposlednej rade aplikácia franchisingu v medzinárodnej spoločnosti Starbucks.

  18. Návrh optimalizace prodeje internetové reklamy

    Benda, Tomáš

    2008-01-01

    Cílem práce je analyzovat reklamní kampaň, která proběhla na serveru Game-Park.cz z pohledu využití a prodeje internetové reklamy a vytvořit návrh optimálního prodeje internetové reklamy. Práce popisuje jednotlivé formy internetové reklamy a jejich vhodnost použití, dále je zde navrhnuto využití internetové reklamy pro úspěšné splnění cílů reklamní kampaně.

  19. Turystyka literacka i filmowa

    Stasiak, Andrzej

    2009-01-01

    Turystyka literacka i filmowa jest na początku XXI w. jedną z najdynamiczniej rozwijających się form turystyki kulturowej. Jej celem są zarówno miejsca i obiekty związane z życiem i działalnością twórców, jak i uwiecznione w dziełach plenery. Szczególne zainteresowanie turystów wzbudzają interaktywne teatralne formy zwiedzania, udział w różnorodnych wydarzeniach kulturalnych, wędrówki szlakami tematycznymi etc. W artykule zaprezentowano fenomen turystyki literacko-filmowej na świecie i w Euro...

  20. Humor a vtip v reklamě

    Krůtová, Iva

    2007-01-01

    Práce se zabývá problematikou využití humoru v reklamě. V teoretické části mapuje současnou situaci využití humorných reklam, sleduje historii, formy ale i právní stránku reklamy obecně. Podrobněji rozebírá problematiku erotiky, hudby a osobnosti v reklamě, ale také guerilla marketing, sociální reklamu a lidovou tvořivost. Hlavní důraz je však kladen na praktickou část práce, která popisuje marketingovou komunikaci společnosti Oskar (dnes Vodafone) a podrobněji ji rozebírá pomocí obsahové ana...

  1. Ocena oczekiwań studentów względem procesu nauczania jako źródła wiedzy i umiejętności niezbędnych do podjęcia pracy zawodowej – wyniki badań ankietowych

    Bąk, Iwona; Wawrzyniak, Katarzyna

    2015-01-01

    Celem badań jest zwrócenie uwagi na oczekiwania studentów i pracodawców względem procesu nauczania, który powinien przygotować absolwentów uczelni do pracy zawodowej. Jest to szczególnie istotne w sytuacji, w której stopa bezrobocia w Polsce wśród osób w wieku 15–24 lata w IV kwartale 2013 roku wynosiła 27,3%1. Znajomość tych oczekiwań może być pomocna dla nauczycieli akademickich, którzy aby sprostać nowym wyzwaniom edukacyjnym, powinni dostosować zarówno treści, jak i formy n...

  2. Háðheimildamyndir. Samanburður við form heimildamynda, staða kvikmyndagerðamannsins og almenn umfjöllun

    Kristín Henný Moritz 1987

    2015-01-01

    Upphaf heimildamynda (e. documentary) má rekja allt aftur til upphaf kvikmyndagerðar. Háðheimildamyndir (e. mockumentary) eru uppspunnar heimildir kvikmyndaðar og settar fram í formi heimilda. Háðheimildamyndir er náskyldar heimildamyndum og hægt er að yfirfæra þær yfir á form og flokkun heimildamynda samkvæmt kenningum kvikmyndafræðingsins Bill Nichols. Í þessari ritgerð rýni ég í tilgang háðheimildamynda, stöðu kvikmyndagerðamanns kvikmyndanna og þær undirgreinar kvikmyndafræðinnar sem þær ...

  3. AcEST: DK951331 [AcEST

    Full Text Available TST38A01NGRL0011_C01 708 Adiantum capillus-veneris mRNA. clone: TST38A01NGRL0011_C01. 5' end seq ... 4D1V1|Q4D1V1_TRYCR Formin, putative OS=Trypanosoma cruzi ... Align length 38 Score (bit) 37.0 E-value 1.2 Repor ... 4D1V1|Q4D1V1_TRYCR Formin, putative OS=Trypanosoma cruzi ... GN=... 37 1.2 tr|Q1HMI6|Q1HMI6_TRYCR Formin A OS=T ... rypanosoma cruzi ... strain CL B... 37 1.2 tr|Q4DJ48|Q4DJ48_TRYCR Formi ... n, putative OS=Trypanosoma cruzi ... GN=... 36 2.1 tr|Q1HMI8|Q1HMI8_TRYCR Formin A OS=T ...

  4. Ženski nadimci u starom Dubrovniku

    Stojan, Slavica

    2003-01-01

    Ženski nadimci nemaju samo identifikacijsku funkciju već pružaju i dodatne obavijesti o ženi, zadirući u pitanje njezina zanimanja, seksualne reputacije, izgleda, karakternih osobina, te iskazujući mišljenje društvene sredine u formi trajne stigme. Nositeljice nadimaka bile su žene iz puka, najčešće one s društvene margine, siromašne, zapuštene, zapale u duševnu i fizičku bijedu, osobito one koje su trgovale svojim tijelom. Ti nadimci vjerno odražavaju ženinu životnu zbilju i njezinu poziciju...

  5. E-learning jako forma wspomagania procesu nauczania informatyki

    Winnicki, Krzysztof

    2012-01-01

    Wydział Studiów Edukacyjnych We współczesnym świecie dobra edukacja jest ważnym elementem jego prawidłowego rozwoju. Szybko rozwijająca się technologia XXI wieku sprawia, że każdy nauczyciel powinien sukcesywnie włączać ją w codzienny tryb swoich zajęć. Szkoły, chcąc być atrakcyjnymi i ciekawymi dla ucznia, będą musiały dostosować swoje formy i metody pracy z uczniem, przez uwzględnienie nowych technologii. W przedstawionej przeze mnie koncepcji pracy doktorskiej omówiłem planowany cyk...

  6. Daňové benefity zaměstnanců

    Česal, Zdeněk

    2008-01-01

    Tato práce se zabývá možnostmi daňově výhodného odměňování zaměstnanců pomocí zaměstnaneckých výhod. Popisuje jak peněžní, tak nepeněžní formy odměňování a motivování pracovníků a zároveň ukazuje jejich dopady na daňové zatížení mzdy. Druhá část práce se věnuje aplikaci vybraných forem odměn s následnou ukázkou jejich uplatnění v podniku.

  7. Free Vibration of Piezo-Nanowires Using Timoshenko Beam Theory with Consideration of Surface and Small Scale Effects

    Oveisi Atta

    2014-03-01

    Full Text Available W pracy badano wpływ efektów powierzchniowych na poprzeczne drgania swobodne nanodrutów piezoelektrycznych (nanowires, NW. Model dynamiczny NW stworzono posługujac sie nielokalna teoria belki Timoszenki. Stosujac te teorie, przy uwzglednieniu zarówno efektów powierzchniowych i efektów nielokalnych, obliczono czestotliwosci drgan własnych nanodrutu. Uzyskane rozwiazanie, o formie zamknietej, pozwala takze obliczyc podstawowe napiecie wyboczenia. Ponadto, zbadano wpływ efektów małej skali na resztkowe naprezenie powierzchniowe i potencjał elektryczny. Wyniki pracy moga byc uzyteczne przy projektowaniu przyrzadów wykorzystujacych nanodruty piezoelektryczne.

  8. Viðhorf ungmenna til kannabis: Samanburður á nemendum 10. bekkjar grunnskóla og 3. árs nemum framhaldsskóla

    Anna Rut Tryggvadóttir 1989

    2015-01-01

    Markmið þessarar rannsóknar var að reyna að varpa ljósi á viðhorf ungmenna til kannabis og kannabisneyslu. Einnig var skoðað hvort aldur og félagsleg staða hefði áhrif á viðhorf og neyslu ungmenna á kannabis. Við framkvæmd rannsóknarinnar var notast við megindlega rannsóknaraðferð í formi spurningalista. Hann var lagður fyrir nemendur á 3. ári í Fjölbrautaskóla Suðurlands, sem náð hafa 18 ára aldri. Til samanburðar var notast við gögn úr ESPAD (the European School Survey Project on Alcohol an...

  9. Lögleiðing kannabisefna

    Sigurður Magnús Sigurðsson 1985

    2012-01-01

    Þessi ritgerð eða rannsókn fjallar um hvort lögleiðsla kannabisefna á Íslandi muni hafa neikvæð eða jákvæð áhrif fyrir samfélagið. Í aldanna rás hefur mannkynið haft mikla reynslu af kannabis/marijúana plöntunni og afurðum hennar. Kannabisefni birtast okkur í ýmsu formi, svo sem í fatnaði, byggingavörum og jafnvel í matvælum, en stærsta ágreiningsefnið hvað kannabis varðar er hampurinn sem marijúana plantan framleiðir. Manneskjur geta reykt, borðað eða drukkið þessa afurð plöntunnar með...

  10. Bilans społecznej wyobraźni. Komentarz socjologiczny do Poznańskiego Budżetu Obywatelskiego

    Drozdowski, Rafał; Frąckowiak, Maciej

    2013-01-01

    Przedmiotem artykułu jest krytyczna analiza budżetu obywatelskiego ze szczególnym uwzględnieniem jego poznańskiej odsłony z 2013 r. Autorzy rozważają, jakich informacji o priorytetach inwestycyjnych mieszkańców, a także o preferowanych przez nich typach relacji obywatel–urzędnik, dostarczają wnioski zgłoszone do poznańskiego budżetu obywatelskiego. Rozpatrują i komentują prawdopodobne linie krytyki tej formy partycypacji; zastanawiają się także nad ograniczeniami i potencjalnymi ścieżkami roz...