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Abdolreza Moghadassi,Shakiba Ghohyei,Samaneh Bandehali,Morteza Habibi,Maryam Eskandari 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.3
Cuprous oxide nanoparticles (Cu2O) were synthesized by electrochemical method and as an add-on toconstruct polyethersulfone (PES) nanofiltration (NF) membranes. Field emission scanning electron microscopy (FESEM),3D surface images, X-ray diffraction (XRD) analysis, and Fourier transform infrared (FTIR) spectroscopy were utilizedto indicate membranes and nanoparticles. Membranes were evaluated by tests of water content, porosity, contact angle,salt rejection, water flux and average pore size measurements. The results show the enhancement of surface hydrophilicityby the addition of Cu2O nanoparticles. The highest unalloyed water flux was obtained by membrane, including0.05 wt% Cu2O nanoparticles, and the highest rejection was revealed by a membrane containing 2 wt% Cu2Onanoparticles. The Na2SO4 rejection reached 66.94%, which was significantly higher than the bare PES membrane. Thisperformance may be owing to increased Na2SO4 adsorption sites. The heavy metals rejection of CrSO4, Pb(NO3)2, andCu (NO3)2 increased 79.38%, 85.08%, and 81% for the M5 membrane, respectively, while it was 45%, 46%, and 49% forbare membrane, respectively. Furthermore, the flux of unalloyed water increased from 9.78 L/m2·h on the pure PESmembrane to 36.78 L/m2·h on the M1 membrane. The decrease of surface roughness and also the increase of hydrophilicgroups improved the antifouling properties of the membranes.
Abolfazl Mahyar,Parviz Ayazi,Shiva Mavadati,Sonia Oveisi,Morteza Habibi,Shiva Esmaeily 대한비뇨의학회 2014 Investigative and Clinical Urology Vol.55 No.8
Purpose: This study was conducted to determine the predictive value of clinical, laboratory,and imaging variables for the diagnosis of vesicoureteral reflux in children withtheir first febrile urinary tract infection. Materials and Methods: One hundred fifty-three children with their first febrile urinarytract infection were divided into two groups according to the results of voiding cystourethrography:60 children with vesicoureteral reflux and 93 children without. Thesensitivity, specificity, positive and negative predictive value, likelihood ratio (positiveand negative), and accuracy of the clinical, laboratory, and imaging variables for thediagnosis of vesicoureteral reflux were determined. Results: Of the 153 children with febrile urinary tract infection, 60 patients (39.2%)had vesicoureteral reflux. There were significant differences between the two groupsregarding fever>38oC, suprapubic pain, C-reactive protein quantitative level, numberof red blood cells in the urine, and results of renal ultrasound and dimercaptosuccinicacid renal scanning (p<0.05). There were significant positive correlations between fever>38.2oC and dimercaptosuccinic acid renal scanning and vesicoureteral reflux. Also, there were significant positive correlations between the erythrocyte sedimentationrate, positive urinary nitrite test, hyaline cast, and renal ultrasound andhigh-grade vesicoureteral reflux. Conclusions: This study revealed fever>38.2oC and dimercaptosuccinic acid renalscanning as the best predictive markers for vesicoureteral reflux in children with theirfirst febrile urinary tract infection. In addition, erythrocyte sedimentation rate, positiveurinary nitrite test, hyaline cast, and renal ultrasound are the best predictivemarkers for high-grade vesicoureteral reflux.
Serum interleukin-1beta and tumor necrosis factor-alpha in febrile seizures: is there a link?
Mahyar, Abolfazl,Ayazi, Parviz,Orangpour, Reza,Daneshi-Kohan, Mohammad Mahdi,Sarokhani, Mohammad Reza,Javadi, Amir,Habibi, Morteza,Talebi-Bakhshayesh, Mousa The Korean Pediatric Society 2014 Clinical and Experimental Pediatrics (CEP) Vol.57 No.10
Purpose: Febrile seizures are induced by fever and are the most common type of seizures in children. Although numerous studies have been performed on febrile seizures, their pathophysiology remains unclear. Recent studies have shown that cytokines may play a role in the pathogenesis of febrile seizures. The present study was conducted to identify potential links between serum interleukin-1beta (IL-$1{\beta}$), tumor necrosis factor-alpha (TNF-${\alpha}$), and febrile seizures. Methods: Ninety-two patients with simple or complex febrile seizures (46 patients per seizure type), and 46 controls with comparable age, sex, and severity of temperature were enrolled. Results: The median concentrations of serum IL-$1{\beta}$ in the simple, complex febrile seizure, and control groups were 0.05, 0.1, and 0.67 pg/mL, respectively (P=0.001). Moreover, the median concentrations of TNF-${\alpha}$ in the simple, complex febrile seizure, and control groups were 2.5, 1, and 61.5 pg/mL, respectively (P=0.001). Furthermore, there were significant differences between the case groups in serum IL-$1{\beta}$ and TNF-${\alpha}$ levels (P<0.05). Conclusion: Unlike previous studies, our study does not support the hypothesis that increased IL-$1{\beta}$ and TNF-${\alpha}$ production is involved in the pathogenesis of febrile seizures.