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Готові списки джерел за темами / Zirconium-91

Добірка наукової літератури з теми "Zirconium-91"

Автор: Grafiati

Опубліковано: 22 червня 2024

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Зміст

Статті в журналах
Дисертації
Частини книг
Тези доповідей конференцій

Статті в журналах з теми "Zirconium-91":

1

Carlisle, B. B., R. J. C. Brown, and T. J. Bastow. "Zirconium-91 NQR in zircon." Journal of Physics: Condensed Matter 3, no. 20 (May 20, 1991): 3675–76. http://dx.doi.org/10.1088/0953-8984/3/20/029.

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2

NAKAMURA, Shoji, Hideo HARADA, Subramanian RAMAN та Paul E. KOEHLER. "Thermal Neutron Capture Cross Sections of Zirconium-91 and Zirconium-93 by Prompt γ-ray Spectroscopy". Journal of Nuclear Science and Technology 44, № 1 (січень 2007): 21–28. http://dx.doi.org/10.1080/18811248.2007.9711252.

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3

Kilpatrick, Alexander F. R., Nicholas H. Rees, Zoë R. Turner, Jean-Charles Buffet, and Dermot O’Hare. "Physicochemical surface-structure studies of highly active zirconocene polymerisation catalysts on solid polymethylaluminoxane activating supports." Materials Chemistry Frontiers 4, no. 11 (2020): 3226–33. http://dx.doi.org/10.1039/d0qm00482k.

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Static ⁹¹Zr ssNMR, SEM-EDX, and DRIFT spectroscopy indicate that a common zirconium species, [Cp^R₂ZrMe]⁺, is present in all sMAO supported catalyst systems.

4

Hackett, P. A., H. D. Morrison, O. L. Bourne, B. Simard, and D. M. Rayner. "Pulsed single-mode laser ionization of hyperfine levels of zirconium-91." Journal of the Optical Society of America B 5, no. 12 (December 1, 1988): 2409. http://dx.doi.org/10.1364/josab.5.002409.

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5

Lanre, Mahmud S., Ahmed E. Abasaeed, Anis H. Fakeeha, Ahmed A. Ibrahim, Abdulrahman S. Al-Awadi, Abdulrahman bin Jumah, Fahad S. Al-Mubaddel, and Ahmed S. Al-Fatesh. "Lanthanum–Cerium-Modified Nickel Catalysts for Dry Reforming of Methane." Catalysts 12, no. 7 (June 29, 2022): 715. http://dx.doi.org/10.3390/catal12070715.

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The catalyst MNi0.9Zr0.1O3 (M = La, Ce, and Cs) was prepared using the sol–gel preparation technique investigated for the dry reforming of methane reaction to examine activity, stability, and H2/CO ratio. The lanthanum in the catalyst LaNi0.9Zr0.1O3 was partially substituted for cerium and zirconium for yttrium to give La0.6Ce0.4Ni0.9Zr0.1-xYxO3 (x = 0.05, 0.07, and 0.09). The La0.6Ce0.4Ni0.9Zr0.1-xYxO3 catalyst’s activity increases with an increase in yttrium loading. The activities of the yttrium-modified catalysts La0.6Ce0.4Ni0.9Zr0.03Y0.07O3 and La0.6Ce0.4Ni0.9Zr0.01Y0.09O3 are higher than the unmodified La0.6Ce0.4Ni0.9Zr0.1O3 catalyst, the latter having methane and carbon dioxide conversion values of 84% and 87%, respectively, and the former with methane and carbon dioxide conversion values of 86% and 90% for La0.6Ce0.4Ni0.9Zr0.03Y0.07O3 and 89% and 91% for La0.6Ce0.4Ni0.9Zr0.01Y0.09O3, respectively. The BET analysis depicted a low surface area of samples ranging from 2 to 9m2/g. The XRD peaks confirmed the formation of a monoclinic phase of zirconium. The TPR showed that apparent reduction peaks occurred in moderate temperature regions. The TGA curve showed weight loss steps in the range 773 K–973 K, with CsNi0.9Zr0.1O3 carbon deposition being the most severe. The coke deposit on La0.6Ce0.4Ni0.9Zr0.1O3 after 7h time on stream (TOS) was the lowest, with 20% weight loss. The amount of weight loss increases with a decrease in zirconium loading.

6

Zhao, Z. W., B. K. Tay, G. Q. Yu, and S. P. Lau. "Nanocrystalline Zirconium Oxide Thin Films Prepared by Filtered Cathodic Vacuum Arc." Journal of Metastable and Nanocrystalline Materials 23 (January 2005): 63–66. http://dx.doi.org/10.4028/www.scientific.net/jmnm.23.63.

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Zirconium oxide thin films were deposited at room temperature by using off-plane filtered cathodic vacuum arc (FCVA). Deposition rate, film structure, compositional analysis and optical properties are studied as a function of working pressure. Deposition rate as high as 53 nm/min could be achieved. As increasing working pressure, the film structure changes from Zr-O solid solution, to monoclinic structure with preferred orientation and finally to randomly oriented nanocrystalline structure. The averaged crystal size increases with working pressure and is less than 15 nm. The ratio of O/Zr increases with working pressure as well as transmittance and good stoichiometric film could be achieved with high transmittance of 91% at high working pressure.

7

Bühl, Michael, Gudrun Hopp, Wolfgang von Philipsborn, Stefan Beck, Marc-Heinrich Prosenc, Ursula Rief, and Hans-Herbert Brintzinger. "Zirconium-91 Chemical Shifts and Line Widths as Indicators of Coordination Geometry Distortions in Zirconocene Complexes†." Organometallics 15, no. 2 (January 1996): 778–85. http://dx.doi.org/10.1021/om950757c.

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8

Reader, Joseph, and Mark D. Lindsay. "Corrigendum: Spectrum and energy levels of five-times ionized zirconium (Zr VI) (2016 Phys. Scr. 91 025401)." Physica Scripta 92, no. 3 (February 13, 2017): 039501. http://dx.doi.org/10.1088/1402-4896/aa5943.

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9

Carulli, Christian, Matteo Innocenti, Rinaldo Tambasco, Alessandro Perrone, and Roberto Civinini. "Total Knee Arthroplasty in Haemophilia: Long-Term Results and Survival Rate of a Modern Knee Implant with an Oxidized Zirconium Femoral Component." Journal of Clinical Medicine 12, no. 13 (June 28, 2023): 4356. http://dx.doi.org/10.3390/jcm12134356.

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(1) Background: Total Knee Arthroplasty (TKA) in patient with haemophilia (PWH) has usually been performed with the use of cobalt-chrome femoral and titanium tibial components, coupled with standard polyethylene (PE) inserts. The aim of this retrospective study was to evaluate the long-term outcomes and survival rates of TKA in a series of consecutive PWH affected by severe knee arthropathy at a single institution. (2) Methods: We followed 65 patients undergoing 91 TKA, implanted using the same implant, characterized by an oxidized zirconium femoral component, coupled with a titanium tibial component, and a highly crosslinked PE. At 1, 6, and 12 months; then every year for 5 years; and finally, every other 3 years, all patients were scored for pain (VAS), function (HJHS; KSS), ROM, and radiographic changes. Kaplan–Meier survivorship curves were used to calculate the implant survival rates. (3) Results: The mean follow-up was 12.3 years (4.2–20.6). All clinical and functional scores improved significantly from preoperatively to the latest follow-up (VAS: from 6.9 to 1.3; HJHS: from 13.4 to 1.9; KSS: from 19.4 to 79; ROM: from 42.4° to 83.6°). The overall survivorship of the implants was 97.5% at the latest follow-up. (4) Conclusions: The present series showed a high survival rate of specific implants potentially linked to the choice of an oxidized zirconium coupled with a highly crosslinked PE. We promote the use of modern implants in these patients in order to ensure long-lasting positive outcomes.

10

Voronina, A. V., and N. V. Belokonova. "Determination of <sup>90</sup>sr in natural waters and water from observing wells at radioactive waste long-term storage and final disposal facilities." Радиохимия 65, no. 4 (August 15, 2023): 380–92. http://dx.doi.org/10.31857/s0033831123040093.

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The optimal conditions for pre-concentration of 90Sr from natural water samples by a T-3K carbonate-containing zirconium dioxide were determined. A method for determination of 90Sr in natural water samples was developed using the T-3K sorbent; the method provides as low detection limits as 0.03 Bq/L for 1L water samples and 0.02 Bq/L for 2L water samples. The method was tested on monitoring of 90Sr in natural water bodies at Sverdlovsk and Chelyabinsk regions as well as in waters of control and observation wells on the territory of a radioactive waste long-term storage facility. It was shown that the developed method can be used without control of strontium chemical yield in case of natural water samples containing up to 76 mg/L of Ca and 5.2 mmol/L of hardness salts taking into account the average strontium chemical yields of 91 ± 1% for 1L water samples and 81 ± 2%, for 2L water samples. In case of water samples with a higher hardness, the dependences of strontium yield on Ca concentration or hardness presented in this paper may be used for evaluation of strontium yield.

Більше джерел

Дисертації з теми "Zirconium-91":

1

Venel, Florian. "Stabilité en présence d’eau des matériaux hybrides microporeux de type Metal-Organic Frameworks : apport de la RMN des solides." Electronic Thesis or Diss., Université de Lille (2018-2021), 2021. http://www.theses.fr/2021LILUR036.

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Les Metal-Organic Frameworks (MOF) sont des matériaux hybrides poreux cristallisés constitués de clusters inorganiques liés les uns aux autres par des ligands organiques. La structure de ces composés offre une porosité très importante et des surfaces spécifiques élevées (jusqu’à plusieurs milliers de m²/g). Mais leur utilisation dans des procédés industriels reste peu développée, notamment à cause d’un manque de connaissance sur leur réactivité vis-à-vis de l’eau. En cours de cette thèse, différentes techniques ont été utilisées afin d’étudier les modifications structurales pouvant intervenir sur l’UiO-66(Zr) en présence de vapeur d’eau : la diffraction des rayons X, l’infrarouge, la mesure de porosité (BET) et la Résonance Magnétique Nucléaires (RMN). Les influences de la longueur du ligand dans l’UiO-67-NH2(Zr) ainsi que la présence de groupement hydrophile dans l’UiO-67-(NH2)2(Zr) ont été étudiées. Nous mettons en avant une stabilité à la vapeur d’eau de certains composés issu de la famille des UiO(Zr) surtout à haute température (200 °C) et une destruction partielle à basse température. De plus, différents enrichissements en 17O de l’UiO-66(Zr) ont été testés permettant l’enregistrement de spectres RMN 17O : enrichissement du ligand par mécanosynthèse, et/ou mise en présence d’eau enrichie. Ces différentes techniques ont permis de mieux comprendre la réactivité des différents sites 17O, et de mettre en avant une certaine labilité des liaisons Zr-O. Enfin des techniques avancées de RMN (basse température et séquence WURST-QCPMG) ont permis de caractériser le cluster de ces composés UiO(Zr) au travers de l’étude du noyau de zirconium-91. De légères modifications du cluster métallique ont pu être pour la première fois observées quand les composés de la famille des UiO(Zr) sont mis en contact avec de la vapeur d’eau. Enfin, des travaux novateurs sur l’élaboration sous la forme de films minces de MOF ont été initiés. Cela doit nous permettre de développer de nouvelles applications dans le domaine de la microélectronique notamment, en fonctionnalisant le substrat utilisé
Metal-Organic Frameworks (MOF) are porous crystallized hybrid materials built from inorganic clusters linked together by organic ligands. The structure of these compounds offers a high porosity and high specific surface areas (up to several thousands of m²/g). But their use at the industrial level is still underdeveloped, most probably because of a lack of knowledge of their reactivity towards water. Different techniques were used to study the structural modifications than can occur when the MOF is in presence of steam water: X-ray diffraction, infrared, porosity measurement (BET) or Nuclear Magnetic Resonance (NMR). The influences of the length of the ligand in the UiO-67-NH2(Zr) as well as the presence of hydrophilic group in the UiO-67-(NH2)2(Zr) were studied. The stability to steam water of some compounds from the family UiO(Zr) is high especially at 200 °C. Even though a partial destruction at low temperature (80°C) is observed. In addition, various 17O enrichments of UiO-66(Zr) were tested allowing the recording of 17O NMR spectra: enrichment of the ligand by mechanosynthesis, and / or the MOF in presence of enriched water. These different techniques have made it possible to better understand the reactivity of the various 17O sites, and to highlight a certain lability of Zr-O bonds. Finally, with advanced NMR techniques (low temperature and WURST-QCPMG sequence) it was possible to characterize the UiO(Zr) compounds through the study of the zirconium-91 isotope. Slight structural modifications of the metallic cluster were then observed. Finally, pioneering work on processing for thin films of MOF has been initiated. This should allow us to develop new applications in the field of microelectronics in particular by functionalizing the substrate

Частини книг з теми "Zirconium-91":

1

Sukhoruchkin, S. I., and Z. N. Soroko. "Excited Nuclear States for Zr-91 (Zirconium)." In Supplement to I/25 A-E, 2306–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-47801-1_327.

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2

Sukhoruchkin, S. I., and Z. N. Soroko. "Excited Nuclear States for Zr-91 (Zirconium)." In Supplement to I/25 A-F, 4643–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-48875-1_521.

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3

Sukhoruchkin, S. I., and Z. N. Soroko. "Excited Nuclear States for Zr-91 (Zirconium)." In Landolt-Börnstein - Group I Elementary Particles, Nuclei and Atoms, 2431–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-22930-5_312.

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4

Sukhoruchkin, S. I., and Z. N. Soroko. "Neutron Resonance Parameters for Zr-91 (Zirconium)." In Neutron Resonance Parameters, 1825–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-87866-7_118.

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5

Sukhoruchkin, S. I., and Z. N. Soroko. "Neutron Resonance Parameters for Zr-91 (Zirconium)." In Supplement to Volume I/24, 1257–71. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-45603-3_121.

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6

Sukhoruchkin, S. I., and Z. N. Soroko. "Atomic Mass and Nuclear Binding Energy for Zr-91 (Zirconium)." In Nuclei with Z = 1 - 54, 4681–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-69945-3_2088.

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Тези доповідей конференцій з теми "Zirconium-91":

1

Kakavand, Tayeb, Morteza Taghilo, and Mahdi Sadeghi. "Determination of 89Zr Production Parameters via Different Reactions Using ALICE and TALYS Codes." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-30298.

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The 89Zr radioisotope is used in the field of tumor diagnostics, tumor therapy and the investigation of the biokinetic. The present work is investigated a suitable reaction to produce 89Zr..The Zirconium-89 excitation function via 89Y(p,n)89Zr, 89Y(d,2n)89Zr, natZr(p,pxn)89Zr, natSr(α,xn)89Zr and 90Zr(n,2n)89Zr reactions were calculated by ALICE-91 and TALYS-1.0 codes and the reaction of 89Y(p,n)89Zr has been selected. The calculated excitation function of 89Y(p,n)89Zr reaction was compared with the reported measurement and evaluations. Requisite thickness of targets was obtained by SRIM code for all above reactions except the 90Zr(n,2n)89Zr reaction. The 89Zr production yield was evaluated with attention to excitation function and stopping power for all above reactions except 90Zr(n,2n)89Zr reaction.

2

Katz, Howard E., Marcia L. Schilling, S. Ungashe, T. M. Putvinski, G. E. Scheller, C. E. Chidsey, and William P. Wilson. "Electrical and nonlinear optical properties of zirconium phosphonate multilayer assemblies." In San Diego, '91, San Diego, CA, edited by Kenneth D. Singer. SPIE, 1991. http://dx.doi.org/10.1117/12.50734.

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