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RISS 인기검색어
- 검색키워드
- 저자 : Afsaneh Shahbazi (검색결과 2 건)
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Afsaneh Shahbazi,Habibollah Younesi,Alireza Badiei 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.9
Organofunctionalized nanostructured silica SBA-15 with tri(2-aminoethyl)amine tetradentate-amine ligandwas synthesized and applied as adsorbent for the removal of Cu2+, Pb2+, and Cd2+from both synthetic wastewater andreal paper mill and electroplating industrial effluents. The prepared materials were characterized by XRD, N2 adsorp-tion-desorption, TGA, and FT-IR analysis. The Tren-SBA-15 was found to be a fast adsorbent for heavy metal ionsfrom single solution with affinity for Cu2+, Pb2+, than for Cd2+due to the complicated impacts of metal ion electronega-tivity. The kinetic rate constant decreased with increasing metal ion concentration due to increasing of ion repulsionforce. The equilibrium batch experimental data is well described by the Langmuir isotherm. The maximum adsorptioncapacity was 1.85 mmol g−1for Cu2+, 1.34 mmol g−1for Pb2+, and 1.08 mmol g−1for Cd2+at the optimized adsorptionconditions (pH=4, T=323 K, t=2 h, C0=3mmol L−1, and adsorbent dose=1 g L−1). All Gibbs energy was negative asexpected for spontaneous interactions, and the positive entropic values from 103.7 to 138.7 J mol−1K−1also reinforcedthis favorable adsorption process in heterogeneous system. Experiment with real wastewaters showed that approxi-mately a half fraction of the total amount of studied metal ions was removed within the first cycle of adsorption. Hence,desorption experiments were performed by 0.3M HCl eluent, and Tren-SBA-15 successfully reused for four adsorp-tion/desorption cycles to complete removal of metal ions from real effluents. The regenerated Tren-SBA-15 displayedalmost similar adsorption capacity of Cu2+, Pb2+, and Cd2+even after four recycles. The results suggest that Tren-SBA-15is a good candidate as an adsorbent in the removal of Cu2+, Pb2+, and Cd2+from aqueous solutions.
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Impact of Metabolic Syndrome on Response to Medical Treatment of Benign Prostatic Hyperplasia
Ali Cyrus,Ali Kabir,Davood Goodarzi,Afsaneh Talaei,Ali Moradi,Mohammad Rafiee,Mehrdad Moghimi,Elham Shahbazi,Elaheh Farmani 대한비뇨의학회 2014 Investigative and Clinical Urology Vol.55 No.12
Purpose: To investigate the effect of metabolic syndrome (MetS) on the response to medicaltherapy of benign prostatic hyperplasia (BPH) after a 3-month period of treatment. Materials and Methods: This was a cohort study of 100 patients, 47 with MetS and 53without MetS, referred to either the primary care unit or referral hospital with BPHwho had moderate lower urinary tract symptoms of prostate involvement and were candidatesfor medical treatment. Our main outcome was response to medical treatmentwith prazosin 1 mg twice a day and finasteride 5 mg daily in patients with BPH on thebasis of International Prostate Symptom Score (IPSS). Multivariate analysis of covariancewas used to compare BPH treatment response in patients with and withoutMetS before and after receiving treatment. Results: The mean volume of the prostate was significantly higher in MetS patientsthan in patients without MetS (57±32.65 mL compared with 46.00±20.19 mL, p=0.036). The control group demonstrated an 11-unit reduction in IPSS, whereas those with MetSshowed a reduction in the symptom score of only 6 units (p<0.001). Regarding the componentsof MetS separately, triglyceride (p<0.001), fasting blood sugar (p=0.001), andwaist circumference (p=0.028) significantly affected the clinical progression of BPH. The observational nature of this study may be a limitation in comparison with an interventionalstudy. Conclusions: The results of the present study showed that MetS can negatively affectthe response to medical treatment of BPH. Therefore, it is necessary to consider MetSin selecting patients with BPH for drug therapy.
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