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| 1 | Comparison of conventional radiography and MDCT in suspected scaphoid fractures显示文摘AIM: To determine the diagnostic accuracy and radiation dose of conventional radiography and multidetector computed tomography(MDCT) in suspected scaphoid fractures.METHODS: One hundred twenty-four consecutive patients were enrolled in our study who had suffered from a wrist trauma and showed typical clinical symptoms suspicious of an acute scaphoid fracture. All patients had initially undergone conventional radiography. Subsequent MDCT was performed within 10 d because of persisting clinical symptoms. Using the MDCT data as the reference standard, a fourfold table was used to classify the test results. The effective dose and impaired energy were assessed in order to compare the radiation burden of the two techniques. The Wilcoxon test was performed to compare the two diagnostic modalities.RESULTS: Conventional radiography showed 34 acute fractures of the scaphoid in 124 patients(42.2%). Subsequent MDCT revealed a total of 42 scaphoid fractures. The sensitivity of conventional radiography for scaphoid fracture detection was 42.8% and its specificity was 80% resulting in an overall accuracy of 59.6%. Conventional radiography was significantly inferior to MDCT(P < 0.01) concerning scaphoidfracture detection. The mean effective dose of MDCT was 0.1 m Sv compared to 0.002 m Sv of conventional radiography.CONCLUSION: Conventional radiography is insufficient for accurate scaphoid fracture detection. Regarding the almost negligible effective dose, MDCT should serve as the first imaging modality in wrist trauma. | Cyrus Behzadi Murat Karul Frank Oliver Henes Azien Laqmani Philipp Catala-Lehnen Wolfgang Lehmann Hans-Dieter Nagel Gerhard Adam Marc Regier | 2015 | World Journal of Radiology2015，7，1： | 4 |
| 2 | Styrene-containing Phosphine-sulfonate Ligands for Nickel-and Palladium-catalyzed Ethylene Polymerization显示文摘A series of phosphine-sulfonate ligands bearing 2-,3-and 4-vinylphenyl on the phosphorus atom were designed,synthesized,characterized and investigated in Ni-and Pd-catalyzed ethylene polymerization.The structure of the phosphine-sulfonate Pd complex bearing 2-vinylphenyl on the phosphorus atom showed 2,1-insertion for the 2-vinyl group.The phosphine-sulfonate Ni complex bearing 2-vinylphenyl resulted in significantly increased thermal stability and polyethylene molecular weights(Mn=3.69×10^(4)g·mol^(-1) at 80℃)versus the counterparts bearing 3-/4-vinyl groups as well as previously reported phosphine-sulfonate Ni complexes bearing bulky biaryl substituents. | Shabnam Behzadi Chen Zou Bang-Pei Yang Chen Tan Chang-Le Chen | 2021 | Chinese Journal of Polymer Science2021，39，4： | 4 |
| 3 | A New Class AOR Preconditioner for L-Matrices显示文摘Hadjidimos(1978) proposed a classical accelerated overrelaxation(AOR) iterative method to solve the system of linear equations, and discussed its convergence under the conditions that the coefficient matrices are irreducible diagonal dominant, L-matrices, and consistently orders matrices. Several preconditioned AOR methods have been proposed to solve system of linear equations Ax = b, where A ∈ R^(n×n) is an L-matrix. In this work, we introduce a new class preconditioners for solving linear systems and give a comparison result and some convergence result for this class of preconditioners. Numerical results for corresponding preconditioned GMRES methods are given to illustrate the theoretical results. | Reza BEHZADI | 2019 | Journal of Mathematical Research with Applications2019，39，1： | 3 |
| 4 | Preparation of polypyrrole/nanosilica composite for solid-phase microextraction of bisphenol and phthalates migrated from containers to eye drops and injection solutions显示文摘This paper describes the electrodeposition of polyphosphate-doped polypyrrole/nanosilica nano-composite coating on steel wire for direct solid-phase microextraction of bisphenol A and five phthalates. We optimized influencing parameters on the extraction efficiency and morphology of the nanocomposite such as deposition potential, concentration of pyrrole and polyphosphate, deposition time and the nanosilica amount. Under the optimized conditions, characterization of the nanocomposite was inves-tigated by scanning electron microscopy and Fourier transform infra-red spectroscopy. Also, the factors related to the solid-phase microextraction method including desorption temperature and time, extrac-tion temperature and time, ionic strength and pH were studied in detail. Subsequently, the proposed method was validated by gas chromatography-mass spectrometry by thermal desorption and acceptable figures of merit were obtained. The linearity of the calibration curves was between 0.01 and 50 ng/mL with acceptable correlation coefficients (0.9956-0.9987) and limits of detection were in the range 0.002-0.01 ng/mL. Relative standard deviations in terms of intra-day and inter-day by five replicate analyses from aqueous solutions containing 0.1 ng/mL of target analytes were in the range 3.3%-5.4% and 5%-7.1%, respectively. Fiber-to-fiber reproducibilities were measured for three different fibers prepared in the same conditions and the results were between 7.3% and 9.8%. Also, extraction recoveries at two different concentrations were ≥96%. Finally, the suitability of the proposed method was demonstrated through its application to the analysis of some eye drops and injection solutions. | Mehdi Ansari Dogaheh Mansoureh Behzadi | 2019 | Journal of Pharmaceutical Analysis2019，9，3： | 2 |
| 5 | Friction-stir-welded overaged 7020-T6 alloy joint: an investigation on the effect of rotational speed on the microstructure and mechanical properties显示文摘Commercial A7020-T6 plates in the overaged state were subjected to friction stir welding with four different tool rotational speeds of 500, 710, 1000, and 1400 r/min and a single traverse feed rate of 40 mm/min. The resultant changes in the welding heat input, microstructure, and the mechanical properties of the joints were investigated. The changes were related to the processes of growth, dissolution, and re-formation of precipitates. The precipitate evolution was examined by differential scanning calorimetry, and the microstructural analysis was conducted using optical, scanning, and transmission electron microscopes. The results showed that the grain size in the stirred zone(SZ) decreased substantially compared with the base metal, but increased with tool rotational speed because of the rise in temperature. We found that the width of the heat-affected zone increased with tool rotational speed. The hardness and the tensile strength in the SZ increased with increasing heat input compared with the base metal in the overaged condition. This recovery in mechanical properties of the joints can be attributed to the dissolution and re-formation of precipitates in the SZ and the thermomechanically affected zone. This process is referred to as an 'auto-aging treatment.' | M.Alipour Behzadi Khalil Ranjbar R.Dehmolaei E.Bagherpour | 2019 | International Journal of Minerals,Metallurgy and Materials2019，26，5： | 2 |
| 6 | Predicting the thermomechanical properties of an epoxy resin blend as a funetion of temperature and strain rate显示文摘 | FOREMAN J P PORTER D BEHZADI S | 2010 | Composites Part A-Applied Science and Manufacturing2010，41，9： | 1 |
| 7 | Mechanics of retrograde nail versus plate fixation for supracondylar femur fractures显示文摘 | Firoozbakhsh K Behzadi K DeCoster TA | | 0，，02： | 1 |
| 8 | Profound alterations in the intrinsic excitability of cerebellar Purkinje neurons following neurotoxin 3-acetylpyridine(3-AP)-induced ataxia in rat:new insights into the role of small conductance K+channels显示文摘 | Kaffashian M Shabani M Goudarzi I Behzadi G Zali A Janahmadi M | 2011 | Physiol Res2011，60，2： | 1 |
| 9 | Ab initio study of two quinoline derivatives as corrosion in- hibitor in acidic media: electronic structure, inhibitor - metal interaction, and nuclear quadrupole resonance parametem显示文摘 | Mobammad Jafar Momeni Hadi Behzadi Peyman Roonasi | 2015 | Research on Chemical Intermediates2015，41，： | 1 |
| 10 | Iberiotoxin-sensitive large conductance Ca^2+-dependent K^+ (BK) channels regulate the sp- ike configuration in the burst firing of cerebellar Purkinje neurons 显示文摘 | Haghdoost-Yazdi H Janahmadi M Behzadi G | 2008 | Brain research2008，1212，： | 1 |
| 11 | Homotopy approximation technique for solving nonlinear Volterra-Fredholm integral equations of the first kind显示文摘 | Behzadi S S | 2014 | International Journal of Industrial Mathematics2014，6，4： | 1 |
| 12 | Review:examining the use of different feedstock for the production of biodiesel 显示文摘 | Behzadi S Farid M M | 2007 | Asia-Pacific Journal of Chemical Engineering2007，2，： | 1 |
| 13 | Toxicity of nanomaterials 显示文摘 | Sharifi S Behzadi S Laurent S | 2012 | ChemSoc Rev2012，41，： | 1 |
| 14 | Cervical Infection with Herpes simplex Virus, Chlamydia trachomatis, and Neisseria gonorrhoeae among symptomatic women, Dubai, UAE:A Molecular approach显示文摘 | Mehrabani D Behzadi MA Azizi S | 2014 | Interdiscip Perspeet Infect Dis2014，14，4： | 1 |
| 15 | A novel coating based on carbon nanotubes poly - ortho - phenylenediamine com- posite for headspace solid - phase microextraction of polycyclic aromatic hydrocarbons 显示文摘 | Behzadi M Nomozian E Mirzaei M | 2013 | Talanta2013，108，： | 1 |
| 16 | Determining ma- jor genotypes of hepatitis C virus among transplant recipients by real-time polymerase chain reaction assay 显示文摘 | Feyznezhad R Behzadi MA Yaghobi R | 2015 | Jundishapur J Mi- crobiol2015，8，2： | 1 |
| 17 | Comparison between two types of artificial neural networks used for validation of pharmaceutical processes显示文摘 | Behzadi S S Prakasvudhisarn C Klocker J | 2009 | Powder Technology2009，195，2： | 1 |
| 18 | Angiotensinogen,angiotensine converting enzyme andplasminogen activator inhibitor-1 gene polymorphism in chronic al-lograft dysfunction显示文摘 | Azarpira N Bagheri M Raisjalali G A Aghdaie M H Behzadi S Salahi H | 2009 | Mol Biol Rep2009，36，： | 1 |
| 19 | Malassezia yeast spe- cies isolated from Iranian patients with pityriasis versieolor in a prospective study 显示文摘 | Rasi A Naderi R Behzadi AH | 2010 | Mycoses2010，53，4： | 1 |
| 20 | The efficacy of photodynamic therapy in treatment of recurrent squamous cell and basal cell carcinoma显示文摘 | Farhadi M Kamrava SK Behzadi AH | | 0，，02： | 1 |
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