نتایج جستجو برای: gadolinium compounds

تعداد نتایج: 237655  

Journal: :Inorganics (Basel) 2022

Magnetic refrigeration material is the key to adiabatic demagnetization technology. In this work, two magnetic refrigerants, Gd5(C4O4)(HCOO)3(CO3)2(OH)6·2.5H2O (1) and Gd2(OH)4SO4 (2), were prepared through hydrothermal reaction. study reveals that their entropy changes are 24.8 J kg−1 K−1 for 1 15.1 2 at K T, respectively. The of T = ∆H exceed most gadolinium hydroxyl compounds, indicating ref...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده علوم 1370

1- in a search directed to the reaction of compound)23(the cycloaddition reaction of 1,3- diphenylisobenzofurane)14(with p-benzoquinone)19(,followed by addition of cyclopentadiene was carried out.the specific spacial stracture of its ir,nmr,mass spectra. 2- in another attempt the kinetic stability and behavior of compounds)20(and)23(was studied.the main subject of this study was the highly reve...

Journal: : 2022

The peculiarities of K2Gd(PO4)(MoO4) single crystal growth from combined phosphate-molybdate melts have been investigated. formation regions GdPO4, KGd(MoO4)2 and their cocrystallization fields with the mixed anionic compound potassium – gadolinium established. IR spect­roscopy showed that in all compounds molybdenum phosphorus are a tetrahedral environment, phase composition was confirmed by X...

Journal: :Acta crystallographica. Section D, Biological crystallography 2003
Eric Girard Meike Stelter Jean Vicat Richard Kahn

Because of their intense white lines and large f" values, lanthanide atoms are of great interest for solving structures of biological macromolecules using single-wavelength anomalous diffraction (SAD) or multiple-wavelength anomalous diffraction (MAD) methods. In this work, a series of seven gadolinium complexes are described which provide excellent derivatives for anomalous diffraction experim...

Journal: :Metals 2021

Magnetic intermetallic compounds based on rare earth elements and 3d transition metals are widely investigated due to the functionality of their physical properties variety possible applications. In this work, we features electronic structure magnetic ternary gadolinium GdMn1-xTixSi, in framework DFT + U method. Analysis densities states moments ions Ti-doped GdMnSi showed a significant change ...

2013
R. S. Boiko A. S. Barabash P. Belli M. Laubenstein D. V. Poda

Cerium, neodymium and gadolinium contain double beta active isotopes. The most interesting are Nd and Gd (promising for 02 search), Ce (2 candidate with one of the highest Q2). The main problem of compounds containing lanthanide elements is their high radioactive contamination by uranium, radium, actinium and thorium. The new generation 2 experiments require development of methods for a de...

Journal: :iranian journal of radiation research 0
n. banaee department of engineering, science and research branch, islamic azad university, tehran, iran h.a. nedaie radiotherapy oncology department, cancer research center, cancer institute, tehran university of medical sciences, tehran, iran a.r. shirazi department of medical physics and biomedical engineering, faculty of medicine and radiation oncology research centre, cancer institute, tehran university of medical sciences, tehran, iran a.r. zirak laser and optics research school, nstri, tehran, iran s. sadjadi nuclear science and technology research institute, tehran, iran

background: new treatment modalities are developed with the aim of escalating tumor absorbed dose and simultaneously sparing the normal structures. the use of nanotechnology in cancer treatment offers some possibilities including destroying cancer tumors with minimal damage to healthy tissues. zinc oxide nanoparticles (zno nps) are wide band gap semiconductors and seem to have a good effect on ...

Journal: :Medical physics 2015
Olumide Ogunlade Paul Beard

PURPOSE Thermoacoustic imaging at microwave excitation frequencies is limited by the low differential contrast exhibited by high water content tissues. To overcome this, exogenous thermoacoustic contrast agents based on gadolinium compounds, iron oxide, and single wall carbon nanotubes have previously been suggested and investigated. However, these previous studies did not fully characterize th...

2017
Jiří Černý Lenka Dokládalová Petra Horáková Antonín Lyčka Tomáš Mikysek Filip Bureš

BACKGROUND A series of rare-earth bisphthalocyanines of praseodymium, samarium and gadolinium bearing 5-bromo-2-thienyl substituents were prepared for the first time. RESULTS Three bis[octakis(5-bromo-2-thienyl)] rare-earth metal(III) bisphthalocyanine complexes (Pr, Sm, Gd) were synthesized for the first time. The new compounds were characterized by UV-vis, NIR, FT-IR, mass spectroscopy and ...

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