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| 1 | Computational fluid dynamics(CFD) simulation of effect of baffles on separation in mixer settler显示文摘The main ideas in the development of the solvent extraction mixer settler focused on achieving clean phase separation,minimizing the loss of the reagents and decreasing the surface area of the settlers.The role of baffles in a mechanically agitated vessel is to ensure even distribution,reduce settler turbulence,promote the stability of power drawn by the impeller and to prevent swirling and vortexing of liquid,thus,greatly improving the mixing of liquid.The insertion of the appropriate number of baffles clearly improves the extent of liquid mixing.However,excessive baffling would interrupt liquid mixing and lengthen the mixing time.Computational fluid dynamics(CFD) provides a tool for determining detailed information on fluid flow(hydrodynamics) which is necessary for modeling subprocesses in mixer settler.A total of 54 final CFD runs were carried out representing different combinations of variables like number of baffles,density and impeller speed.CFD data shows that amount of separation increases with increasing baffles number and decreasing impeller speed. | Mohsen Ostad Shabani Ali Mazahery Mehdi Alizadeh Ali Asghar Tofigh Mohammad Reza Rahimipour Mansour Razavi Alireza Kolahi | 2012 | International Journal of Mining Science and Technology2012，22，5： | 12 |
| 2 | A controllable hydrothermal method to prepare La(OH)_3 nanorods using new precursors显示文摘Using the hydrothermal method, lanthanum hydroxide nanorods were synthesized by the reaction of La Cl3·7H2O, ethylenediamine, and hydrazine. According to SEM results, ethylenediamine and hydrazine with p H management could control the particle growth and played an important role in formation of lanthanum hydroxide nanorods. The morphology and microstructure of the obtained products were characterized by X-ray diffraction(XRD) spectra, energy-dispersive X-ray spectroscopy(EDX), Fourier transformed infrared(FTIR) spectrum, transmission electron microscopy(TEM), and scanning electron microscopy(SEM). Furthermore, the effects of the molar ratio of the precursors as well as the reaction temperature and time on the morphology and particle size of the products were investigated. | Mehdi Mousavi-Kamazani Sakineh Alizadeh Fateme Ansari Masoud Salavati-Niasari | 2015 | Journal of Rare Earths2015，33，4： | 4 |
| 3 | Fluid Flow and Mixing in Non-Isothermal Water Model of Continuous Casting Tundish显示文摘Fluid flow and mixing of molten steel in a twin-slab-strand continuous casting tundish were investigated using a mixing model under non-isothermal conditions.This model led to a set of ordinary differential equations that were solved with a Runge-Kutta algorithm.Steady state water modeling was carried out under non-isothermal conditions.Experimental data obtained from the water model were used to calibrate the mixing model.Owing to the presence of a mixed convection in the non-isothermal conditions,a channelizing flow would be created in the fluid inside the tundish.A mixing model was designed that was capable of predicting RTD(residence time distribution)curves for different cases in non-isothermal conditions.The relationship between RTD parameters and the Tu(tundish Richardson number)was obtained for various cases under non-isothermal conditions.The results show that the RTD parameters were completely different under isothermal and non-isothermal conditions.The comparison of the RTD curves between the isothermal and non-isothermal conditions presents that the extent of mixing in the tundish in non-isothermal conditions is lower than the mixing extent in isothermal conditions. | Mehdi ALIZADEH Hossein EDRIS Ali SHAFYEI | 2008 | Journal of Iron and Steel Research(International)2008，15，2： | 3 |
| 4 | Alunite processing method selection using the AHP and TOPSIS approaches under fuzzy environment显示文摘Alunite is the most important non bauxite resource for alumina. Various methods have been proposed and patented for processing alunite, but none has been performed at industrial scale and no technical,operational and economic data is available to evaluate methods. In addition, selecting the right approach for alunite beneficiation, requires introducing a wide range of criteria and careful analysis of alternatives.In this research, after studying the existing processes, 13 methods were considered and evaluated by 14 technical, economic and environmental analyzing criteria. Due to multiplicity of processing methods and attributes, in this paper, Multi Attribute Decision Making methods were employed to examine the appropriateness of choices. The Delphi Analytical Hierarchy Process(DAHP) was used for weighting selection criteria and Fuzzy TOPSIS approach was used to determine the most profitable candidates. Among 13 studied methods, Spanish, Svoronos and Hazan methods were respectively recognized to be the best choices. | Alizadeh Shahab Salari Rad Mohammad Mehdi Bazzazi Abbas Aghajani | 2016 | International Journal of Mining Science and Technology2016，26，6： | 3 |
| 5 | Syn- thesis of the novel pyrimido pyrimidine and imid- azo pyfimidine derivatives based on heterocyclic ketene aminals 显示文摘 | Abdolali Alizadeh Javad Mokhtari Mehdi Ahmadi | 2012 | Tetrahedron2012，68，： | 1 |
| 6 | Behavior of miexd grade during the grade transition for different conditions in the slab continuous casting显示文摘 | Mehdi ALIZADEH Hossein EDRIS Ahmad Reza PISHEVAR | 2008 | ISIJ International2008，48，01： | 1 |
| 7 | Brucellosis: Pathophysiology and new promising treatments with medicinal plants and natural antioxidants显示文摘Brucellosis is an old, infectious and common zoonosis whose causative agents are Gramnegative bacteria from the Brucella genus. Brucellosis is transmitted through direct contactwith infected animals or using unpasteurized dairy products of goats, pigs, camels, sheep,buffalo and cows. Brucellosis is still the most common zoonosis in the world, with mostof cases occurring in developing countries. Today, an approach to traditional medicine andmedicinal plants, especially with regards to the repeated recommendations of the World HealthOrganization, is a necessity. One-third of chemical drugs are produced by using plants andthere is a high potential to produce more drugs from plants. Medicinal plants are helpful inthe management of various conditions, especially bacterial diseases. Although there is notenough scientific evidence regarding the clinical effectiveness of herbal drugs for the treatmentof brucellosis, there is strong evidence on the antimicrobial effects of herbal drugs to preventinfection. Therefore, this article seeks to describe the antibacterial effects of some plantderived essential oils or extracts, so that they can serve as promising choices to develop newanti-Brucella medications, as suitable alternatives to conventional antibiotics for brucellosis, asmuch as possible, taking into account the benefits of these herbal drugs. | Mohsen Alizadeh Ali Safarzadeh Mahmoud Bahmani Fatemeh BeyranvAND Mehdi Mohammadi Kimia Azarbaijani Mahmoud Rafieian-Kopaei Saber Abbaszadeh | 2018 | Asian Pacific Journal of Tropical Medicine2018，11，11： | 1 |
| 8 | 甲醇-水二元混合物中Co(bpb)与叠氮离子反应的动力学研究(英文)显示文摘Co(bpb) [bpbH2is N,N′-o-phenylenebis(pyridine-2-carboxamide) ,C18H12N4O2] complex has active axial sites like a porphyrin complex. We studied the coordination of azide ion(N3-) to Co(bpb) in binary methanol-water mixtures by spectrophotometric method at the temperature range of 283-303 K. From the temperature dependence of the rate constant,activation parameters(Ea,ΔH,ΔS,and ΔG) were obtained. An isokinetic temperature at about 302 K was observed at which the formation rate of Co(bpb) -N3-was more or less independent of the solvent composition. The resulting ΔH against TΔS plot showed a good linear correlation,indicating the existence of enthalpy-entropy compensation in azide complexation process. Under optimum conditions and based on the absorbance of Co(bpb) -N3-produced through complex formation,a spectrophotometric method for the determination of N 3-in solution was developed. A linear relationship between the absorbance and N3-concentration was obtained in the range of(0.85-5.00) × 10-4 mol·L-1(3.6-21.0 μg·mL-1) . The detection limit was 2.5×10-5 mol·L-1(1.0 μg·mL-1) . The proposed method was applied to the determination of N3-anion in real water samples. | HASHEMI Javad ALIZADEH Naader MEGHDADI Soraia AMIRNASR Mehdi | 2009 | 物理化学学报2009，25，6： | 1 |
| 9 | Reproducing indolent B-cell lymphoma transformation with T-cell immunosuppression in LMP1/CD40-expressing mice显示文摘Indolent B-cell lymphomas are a group of incurable cancers of the elderly that encompass various entities,such as chronic lymphocytic leukemia(CLL),follicular lymphoma(FL),and marginal zone lymphoma(MZL).All indolent lymphomas may evolve towards aggressive transformation with an increased proliferation index and decreased tumor doubling time.This transformation,which is called Richter’s syndrome in CLL,is associated with an aggressive clinical course and poor survival.At least in CLL,transformation of an indolent B-cell clone is molecularly different from that of de novo diffuse large B-cell lymphomas.1 Aging is known to be associated with immune decline,with increased inflammation,decreased immune surveillance and increased onset of malignancies among the consequences.2 Progression of indolent B-cell lymphomas is likely to be associated with escape from immune surveillance. | Christelle Vincent-Fabert Alexis Saintamand Amandine David Mehdi Alizadeh François Boyer Nicolas Arnaud Ursula Zimber-Strobl Jean Feuillard Nathalie Faumont | 2019 | Cellular & Molecular Immunology2019，16，4： | 0 |
| 10 | Structure and principles of self-assembly of giant“sea urchin”type sulfonatophenyl porphine aggregates显示文摘Principles of molecular self-assembly into giant hierarchical structures of hundreds of micrometers in size are studied in aggregates of meso-tetra(4-sulfonatophenyl)porphine(TPPS_(4)).The aggregates form a central tubular core,which is covered with radially protruding filamentous non-branching aggregates.The filaments cluster and orient at varying angles from the core surface and some filaments form bundles.Due to shape resemblance,the structures are termed giant sea urchin(GSU)aggregates.Spectrally resolved fluorescence microscopy reveals J-and H-bands of TPPS_(4)aggregates in both the central core and the filaments.The fluorescence of the core is quenched while filaments exhibit strong fluorescence.Upon drying,the filament fluorescence gets quenched while the core is less affected,showing stronger relative fluorescence.Fluorescencedetected linear dichroism(FDLD)microscopy reveals that absorption dipoles corresponding to J-bands are oriented along the filament axis.The comparison of FDLD with scanning electron microscopy(SEM)reveals the structure of central core comprised of multilayer ribbons,which wind around the core axis forming a tube.Polarimetric second-harmonic generation(SHG)and thirdharmonic generation microscopy exhibits strong signal from the filaments with nonlinear dipoles oriented close to the filament axis,while central core displays very low SHG due to close to centrosymmetric organization.Large chiral nonlinear susceptibility points to helical arrangement of the filaments.The investigation shows that TPPS_(4)molecules form distinct aggregate types,including chiral nanotubes and nanogranular aggregates that associate into the hierarchical GSU structure,prototypical to complex biological structures.The chiral TPPS_(4)aggregates can serve as harmonophores for nonlinear microscopy. | Marijus Pleckaitis Fayez Habach Lukas Kontenis Gábor Steinbach Greta Jarockyte Agne Kalnaityte IldikóDomonkos Parveen Akhtar Mehdi Alizadeh Saulius Bagdonas Vitalijus Karabanovas GyőzőGarab Ricardas Rotomskis Virginijus Barzda | 2022 | Nano Research2022，15，6： | 0 |
| 11 | 创伤性视网膜中央动脉阻塞1例报告(英文)显示文摘本文报告1例钝器眼伤后出现的视网膜中央动脉阻塞,这种病症比较稀少,文献报告中也不多见。视网膜中央动脉阻塞尽管少见但对视力影响非常大,在对急性创伤性视力减退进行鉴别诊断时应考虑到这种情况。 | Khalil Hamzedust Mohammad Taher Rajabi Mohammad Solaimani Mehdi Alizadeh | 2008 | 国际眼科杂志2008，8，7： | 0 |
| 12 | The Main Insect Pests of Safflower on Various Plant Parts in Iran显示文摘 | Mehdi Nasr Esfahani Giti Alizadeh Zahra Zarei Mohamad Nasr Esfahani | 2012 | Journal of Agricultural Science and Technology(A)2012，2，11： | 0 |
| 13 | Does delayed gastric emptying shorten the H pylori eradication period? A double blind clinical trial显示文摘AIM: To evaluate the gastric emptying inhibitory effects of sugar and levodopa on H pylori eradication period. METHODS: A total of 139 consecutive patients were randomized into 6 groups. The participants with peptic ulcer disease or non-ulcer dyspepsia non-responding to other medications who were also H pylori-positive patients either with positive rapid urease test (RUT) or positive histology were included. All groups were pretreated with omeprazole for 2 d and then treated with quadruple therapy regimen (omeprazole, bismuth, tetracycline and metronidazole); all drugs were given twice daily. Groups 1 and 2 were treated for 3 d, groups 3, 4 and 5 for 7 d, and group 6 for 14 d. Groups 1 to 4 received sugar in the form of 10% sucrose syrup. Levodopa was prescribed for groups 1 and 3. Patients in groups 2 and 4 were given placebo for levodopa and groups 5 and 6 received placebos for both sugar and levodopa. Upper endoscopy and biopsies were carried out before treatment and two months after treatment. Eradication of H pylori was assessed by RUT and histology 8 wk later.RESULTS: Thirty patients were excluded. Per-protocol analysis showed successful eradication in 53% in group 1, 56% in group 2, 58% in group 3, 33.3% in group 4, 28% in group 5, and 53% in group 6. Eradication rate, patient compliance and satisfaction were not significantly different between the groups. CONCLUSION: It seems that adding sugar or levodopa or both to anti H pylori eradication regimens may lead to shorter duration of treatment. | Mohammad Hassan Emami Mohammad Mehdi Saberfiroozi Abbas Arj Ali Reza Taghavi Kamran Bagheri-Lankarani Najaf Dehbashi Mohammad Reza Fattahi Mahvash Alizadeh Mohammad Javad Kaviani Rahim Bahri-Najafi Bita Geramizadeh Abbas Esmaeili | 2006 | World Journal of Gastroenterology2006，12，39： | 0 |
| 14 | Numerical simulation of fatigue crack propagation in heterogeneous geomaterials under varied loads using displacement discontinuity method显示文摘Heterogeneous brittle geomaterials are highly susceptible to cyclic loads.They contain inherent flaws and cracks that grow under fatigue loads and lead to failure.This study presents a numerical model for analyzing fatigue in these materials based on the two-dimensional(2D)boundary element method and linear elastic fracture mechanics.The process is formulated by coupling the displacement discontinuity method with the incorporation technique of dissimilar regions and the governing equations of fatigue.The heterogeneous media are assumed to consist of materials with different properties,and the interfaces are assumed to be completely bonded.In addition,the domains include multiple cracks exposed to constant and variable amplitude cyclic loads.The stress intensity factor is a crucial parameter in fatigue analysis,which is determined using the displacement field around crack tips.An incremental crack growth scheme is applied to calculating the fatigue life.The growth rate values are employed to estimate the length of crack extension when there are multiple cracks.The interaction between cracks is considered,which also includes the coalescence phenomenon.Finally,various structures under different cyclic loads are examined to evaluate the accuracy of this method.The results demonstrate the efficiency of the proposed approach in modeling fatigue crack growth and life estimation.The behavior of life curves for the heterogeneous domain was as expected.These curves illustrate the breakpoints caused by utilizing discrete incremental life equations.At these points,the trend of the curves changed with the material properties and fatigue characteristics of the new material around the crack tips. | Rezvan Alizadeh Mohammad Fatehi Marji Abolfazl Abdollahipour Mehdi Pourghasemi Sagand | 2023 | Journal of Rock Mechanics and Geotechnical Engineering2023，15，3： | 0 |
| 15 | Numerical investigation of grooves effects on the thermal performance of helically grooved shell and coil tube heat exchanger显示文摘Heat exchangers are integral parts of important industrial units such as petrochemicals,medicine and power plants.Due to the importance of systems energy consumption,different modifications have been applied on heat exchangers in terms of size and structure.In this study,a novel heat exchanger with helically grooved annulus shell and helically coiled tube was investigated by numerical simulation.Helically grooves with the same pitch of the helical coil tube and different depth are created on the inner and outer wall of annulus shell to improve the thermal performance of heat exchanger.In the first section,thermal performance of the shell and coil heat exchanger with the helical grooves on its outer shell wall was compared with same but without helical grooves.At the second section,helically grooves created on both outer and inner wall of the annulus shell with different groove depths.The results showed that the heat exchanger with grooves on both inner and outer shell wall has better thermal performance up to 20%compared to the heat exchanger with grooves on only outer shell wall.The highest thermal performance achieves at lower flow rates and higher groove depths whereas the pressure drop did not increase significantly. | Mehdi Miansari Mehdi Rajabtabar Darvishi Davood Toghraie Pouya Barnoon Mojtaba Shirzad As'ad Alizadeh | 2022 | Chinese Journal of Chemical Engineering2022，35，4： | 0 |
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