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- 저자 : Karimimaskon, Fatemeh (검색결과 2 건)
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A simple one Step Thermochemical Approach for Synthesis of ZnS:Mn Nanocrystals (NCs)
Molaei, Mehdi,Lotfiani, Ahmad,Karimimaskon, Fatemeh,Karimipour, Masoud,Khanzadeh, Mohammd The Institute of Electronics and Information Engin 2014 Journal of semiconductor technology and science Vol.14 No.1
In this work we have synthesized ZnS:Mn nanocrystals (NCs) using a simple one step thermochemical method. $Zn(NO_3)_2$ and $Na_2S_2O_3$ were used as the precursors and $Mn(NO_3)_2$ was the source of impurity. Thioglycolic acid (TGA) was used as the capping agent and the catalyst of the reaction. The structure and optical property of the NCs were characterized by means of X- ray diffraction (XRD), HRTEM, UV-visible optical spectroscopy and photoluminescence (PL). X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses demonstrated cubic phase ZnS:Mn NCs with an average size around 3 nm. Synthesized NCs exhibited band gap of about 4 eV. Photoluminescence spectra showed a yellow-orange emission with a peak located at 585 nm, demonstrating the Mn incorporation inside the ZnS particles.
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Ali Noorafshan,Saied Karbalay-Doust,Fatemeh Karimimaskon 대한비뇨의학회 2013 Investigative and Clinical Urology Vol.54 No.4
Purpose: Kidney stones (nephrolithiasis) are a widespread disease. Thus, blocking stone formation and finding new therapeutic methods is an important area of study. Diosmin (a major component of the bile) is known to have antioxidant as well as renoprotective effects. The present investigation aimed to evaluate the effect of diosmin on renal tissue protection in rats with ethylene glycol-induced nephrolithiasis. Materials and Methods: The rats were randomly divided into three groups. Group one (control) did not receive any treatments. In groups two and three, nephrolithiasis was induced by 2.5% (V/V) ethylene glycol + 2.5% (W/V) ammonium chloride (2 mL/d). The second and the third groups received distilled water or diosmin (80 mg/kg/d) by gavage for 21 days. Results: Stereological estimation of the renal structures revealed that the average volume of calcium oxalate (CaOx) in the nephrolithiasis+diosmin rats was –63% less than in the rats with untreated nephrolithiasis (p<0.01). The volume of the glomeruli, proximal and distal convoluted tubules, Henle’s loop, collecting ducts, and vessels was reduced –32% to 58% after the induction of nephrolithiasis (p<0.001). In the nephrolithiasis+diosmin rats, on average, –70% to 96% of the glomeruli, proximal convoluted tubules, Henle’s loop collecting ducts, and vessels remained intact (p<0.01). Degeneration of the cortical tissue was 5-fold that of the medulla. In the nephrolithiasis+diosmin rats, degeneration in the renal cortical tissue and medulla was reduced –70% and 44%, respectively, compared with that in the untreated nephrolithiasis group (p<0.01). Conclusions: Diosmin reduces CaOx deposition and the degeneration of glomeruli and tubules in a rat model of nephrolithiasis.
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