نتایج جستجو برای: neodymium compounds

تعداد نتایج: 228697  

Journal: :Molecules 2017
Lawrence Nnamdi Obasi Uchechukwu Susan Oruma Ibrahim Abdulrazak Al-Swaidan Ponnadurai Ramasami Chigozie Julius Ezeorah Alfred Ezinna Ochonogor

N-(Benzothiazol-2-yl)-4-chlorobenzenesulphonamide (NBTCS) was synthesized by condensation reaction of 4-chlorobenzenesulphonyl chloride and 2-aminobenzothiazole in acetone under reflux. Neodymium(III) and thallium(III) complexes of the ligand were also synthesized. Both ligand and metal complexes were characterized using UV-Vis, IR, ¹H- and 13C-NMR spectroscopies, elemental analysis and molar c...

2015
H. Vogel

The development of the Chinese neodymium oxide electrolysis which replaced the chloride and fluoride electrolysis in the 1980s is described. Industrial data of the running neodymium electrolysis are given with scientific research references about the process. The new Chinese development of a horizontal electrode cell design is presented and concluded with a worldwide outlook.

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: :Science 1982
A H Narten R L Hahn

Much information on ionic solvation in electrolyte solutions has been inferred from macroscopic thermodynamic and transport properties and from spectroscopy. These ion-water interactions can now be probed directly and unambiguously by neutron diffraction. Such measurements have been done with neodymium trichloride solutions in heavy water that are identical in every respect except the isotopic ...

Journal: :Acta pharmaceutica 2004
Irena Kostova Ilia Manolov Maritza Radulova

A complex of neodymium(III) with 4-hydroxy-3[1-(4-nitrophenyl)-3-oxobutyl]-2H-1-benzopyran-2-one (acenocoumarol) was synthesized by mixing water solutions of neodymium(III) nitrate and the ligand (metal to ligand molar ratio of 1:3). The complex was characterized and identified by elemental analysis, conductivity, IR, 1H NMR and mass spectral data. DTA and TGA were applied to study the composit...

2009
Christof Schneck Patrick Höss Thomas Schleid

The title compound, neodymium sesquiselenide, is isotypic with the other known rare-earth metal(III) selenides M(2)Se(3) (M = La-Pr and Sm-Lu) with the cubic C-type structure. It adopts a cation-defective Th(3)P(4)-type arrangement with close to 8/9 of the unique neodymium-cation site occupied, leading to the composition Nd(2.667)Se(4) (Z = 4) or Nd(2)Se(3) (Z = 5.333), respectively. The Nd(3+)...

2017
Lindsay J Arvin Clifford S Riebe Sarah M Aciego Molly A Blakowski

A global compilation of erosion rates and modeled dust fluxes shows that dust inputs can be a large fraction of total soil inputs, particularly when erosion is slow and soil residence time is therefore long. These observations suggest that dust-derived nutrients can be vital to montane ecosystems, even when nutrient supply from bedrock is substantial. We tested this hypothesis using neodymium i...

Journal: :Nature chemistry 2017
Brett F Thornton Shawn C Burdette

In 1838, Swedish chemist Carl Mosander isolated lanthanum, a new metal that had been hiding in Berzelius’ cerium since 18031. Two years later, he found yet another metal in cerium — this third component was responsible for a purplish hue in his samples2. He named this metal didymium, from a Greek word meaning twin. Didymium shared many chemical properties with lanthanum and thus appeared to be ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید