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291.
Tanveer Hussain Bokhari A. Mushtaq Islam Ullah Khan 《Journal of Radioanalytical and Nuclear Chemistry》2010,284(2):265-271
Production of radioactive scandium by irradiating natural titanium metal in Pakistan Research Reactor-1 was evaluated. The
production rate of 47Sc and other radioactive scandium was estimated. High specific activity 47Sc can be produced by irradiating enriched 47Ti in sufficient quantities needed for therapeutic applications. A new separation technique based on column chromatography
was developed. Neutron irradiated titanium was dissolved in hydrofluoric acid, which was evaporated and taken in distilled
water. The resulting solution was loaded on silica gel column. The radioactive scandium comes out first and the inactive titanium
is removed with 2 M HCl. More than 95% radioactive scandium was recovered, while chemical impurity of titanium determined
by optical emission spectroscopy was less than 0.01 μg/mL in final product. 相似文献
292.
N. Lehraki M.S. Aida S. Abed N. Attaf A. Attaf M. Poulain 《Current Applied Physics》2012,12(5):1283-1287
Zinc oxide (ZnO) thin films were deposited by spray pyrolysis technique using different precursors. Three starting solutions salts namely: zinc acetate, zinc chloride and zinc nitrate were used. The properties of these solutions and their influence upon ZnO films growth rate are investigated. The obtained results indicate that the dissociation energy of the starting solution plays an important role on films growth rate. A linear relationship between the solution dissociation energy and the growth rate activation energy was found. However, the surface tension of the used solution controls the droplet shape impact. Both solution surface tension and dissociation enthalpy alter the microstructure of the formed film. Films deposited with zinc acetate are characterized by a smooth surface, dense network and high transparency, while films deposited with zinc chloride have a better crystallinity and low optical transmittance. 相似文献
293.
Optical Review - The effects of guided mode resonance (GMR) are largely used in optical communications because of its accurate line width and good capability. Specially study of titanium dioxide... 相似文献