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Electrocatalytic behaviour of Ni and NiCu alloy modified glassy carbon electrode in electro-oxidation of contraflam

Journal of Central South University 2017年第8期24卷 1703-1712页

作者： Naeemy ali mohammadi ali Ehsani ali Aghassi ali Department of Drug and Food Control and Pharmaceutical Qtlality Assurance Research:Centre Faculty of PharmacyTehran University of Medical SciencesP.O.Box 14155-6451TehranIran Nanotechnology Research Centre Faculty of PharmacyTehran University of Medical SciencesP.O.Box 14155-6451TehranIran Department of Chemistry Faculty of ScienceUniversity of QomP.O.Box 37185-359QomIran

The electrocatalytic oxidation of contraflam was investigated in alkaline solution on nickel and nickel–copper alloy modified glassy carbon electrodes(GC/Ni and GC/NiCu). We prepared these electrodes by galvanostatic deposition and the surface morphologies and compositions of electrodes were determined by energy-dispersive X-ray(EDX) and scanning electron microscopy(SEM). Cyclic voltammetry and chronoamperometric methods were employed to characterize the oxidation process and its kinetics. Voltammetric studies exhibit one pair of well-defined redox peaks, which is ascribed to the redox process of the nickel and followed by the greatly enhanced current response of the anodic peak in the presence of contraflam and a decrease in the corresponding cathodic current peak. This indicates that the immobilized redox mediator on the electrode surface was oxidized contraflam via an electrocatalytic mechanism. The catalytic currents increased linearly with the concentration of contraflam in the range of 0.25– 1.5 mmol/L. The anodic peak currents were linearly proportional to the square root of scan rate. This behaviour is the characteristic of a diffusion-controlled process. The determination of contraflam in capsules is applied satisfactorily by modified electrode.

关键词： galvanostatic deposition nickel nickel-copper alloy contraflam modified electrodes cyclic voltammetry oxidation

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Methodologies of preparing erosion features map by using RS and GIS

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International Journal of Sediment Research 2008年第2期23卷 130-137页

作者： mohammadi Torkashvand ali Nikkami Davood Islamic Azad University-Rasht branch RashtIranAssis.Prof Soil Conservation and Watershed Management Research Institute TehranIranAssis.Prof

The erosion features map is one of the basic maps in erosion and sediment studies and watershed management *** methodologies of preparing erosion features map by using RS and GIS were compared in research which took place in the Jajrood sub-basin in north-east Tehran,*** the first phase,four working units’ maps were prepared by integration a) plant cover,geology and slope b) land use,geology and slope c) land use,rocks sensitivity to erosion and slope and d) land use,rocks sensitivity to erosion and land units’ *** addition to these four working units’ maps,three more maps were also evaluated in separating erosion features including e) land units f) sensitivity of rocks to erosion and g) image photomorphic *** efficiency of these seven working units’ maps was evaluated by 314 control *** this purpose,by using erosion features of control points regarding field views,surface,rill,gully and channel erosion maps were prepared and compared by crossing them with working units’ *** showed that method "d" was better than "a","b" and "c" in providing soil erosion features regarding economic and executive *** accuracy of methods "e" and "f" was 53.0 and 42.9% and their Root Mean Squared Error was more than method "g" and methods "a" to "d".The coefficient of variation was highest for methods "e" and "f" and the least for method "e" and the greatest precision was related to image interpretation.

关键词： Map of soil erosion Remote sensing GIS Jajrood river basin Iran

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Morphology selective construction of β-cyclodextrin functionalized Fe3O4-Bi2WO6 nanocomposite with superior adsorptivity and visible-light-driven catalytic activity

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Frontiers of Chemical Science and Engineering 2020年第4期14卷 561-578页

作者： Maher Darwish ali mohammadi Navid Assi Samer Abuzerr Youssef Alahmad Pharmaceutical Quality Assurance Research Centre Faculty of PharmacyIntermational CampusTehran University of Medical SciencesTehranIran Department of Pharmacy Al-Safwa University CollegeKarbalalraq Nanotechnology Research Centre Faculty of PharmacyTehran University of Medical SciencesTehranIran Department of Environmental Health Engineering Faculty of Public HealthIntermational CampusTehran University of Medical SciencesTehranIran Department of Pharmaceutical Chemistry and Drug Control Faculty of PharmacyAlbaath UniversityHomsSyria

Controlled growth of Bi2WO6 nanorods with exposed[001]facets and the fabrication of an Fe2O4-Bi2WO6 magnetic composite by a microwave-assisted polyol process,were achieved in this *** adsorp-tivity and photocatalytic performance of the composite toward sunset yellow dye degradation were greatly enhanced by the β-cyclodextrin cavities on its surface,firmly anchored through a cetyltrimethylammonium bro-mide linkage.A series of examinations and characteriza-tions were carried out to determine the influence of various factors on the morphological modulation-photocatalytic behavior of the pure Bi2WO6 prior to final *** the pH of the precursor solution impacted the formation of 0D,2D,and 3D structures;however,the presence of hexamethylenetetramine surfactant induced the development of 1D nanorod structure.A reasonable crystal growth mechanism was proposed to elucidate the formation ***,the mechanism of the activity enhancement of β-cyclodextrin functionalized Fe2O4-Bi2WO6,compared to that of the non-functiona-lized samples,could be realized with the assistance of chemical trapping experiments on sunset yellow,and was confirmed on the colorless antibiotic(sulfamethoxazole).The high performance and durability of this composite can be attributed to the facet-dependent activity,large adsorp-tion capacity due to inclusion interactions,enhanced visible light absorption,and efficient charge separation.

关键词： β-cyclodextrin Bi2WO6 shape controlled nanorod sunset yellow

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Fischer-Tropsch synthesis by reduced graphene oxide nanosheets supported cobalt catalysts: role of support and metal nanoparticle size on catalyst activity and products selectivity

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Frontiers of Chemical Science and Engineering 2021年第2期15卷 299-309页

作者： Hasan Oliaei Torshizi ali Nakhaei Pour ali mohammadi Yahya Zamani Seyed Mehdi Kamali Shahri Department of Chemistry Faculty of ScienceFerdowsi University of MashhadMashhad ***Iran Gas Research Division Research Institute of Petroleum IndustryTehran ***Iran Department of Chemical Engineering Pennsylvania State UniversityState CollegePA 16801USA

In this paper,a series of cobalt catalysts supported on reduced graphene oxide(rGO)nanosheets with the loading of 5,15 and 30 wt-%were provided by the impregnation *** activity of the prepared catalysts is evaluated in the Fischer-Tropsch synthesis(FTS).The prepared catalysts were carefully characterized by nitrogen adsorption-desorption,hydrogen chemisorption,X-ray diffraction,Fourier transform infrared spectroscopy,Raman spectroscopy,temperature programmed reduction,transmission electron microscopy,and field emission scanning electron microscopy techniques to confirm that cobalt particles were greatly dispersed on the rGO *** results showed that with increasing the cobalt loading on the rGO support,the carbon defects are increased and as a consequence,the reduction of cobalt is *** FTS activity results showed that the cobalt-time yield and turnover frequency passed from a maximum for catalyst with the Co0 average particle size of 15 nm due to the synergetic effect of cobalt reducibility and particle *** products selectivity results indicated that the methane selectivity decreases,whereas the C5+selectivity raises with the increasing of the cobalt particle size,which can be explained by chain propagation in the primary chain growth reactions.

关键词： cobalt catalyst cobalt particle size Fischer-Tropsch synthesis reduced graphene oxide supported catalyst

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Prediction of kiwifruit firmness using fruit mineral nutrient concentration by artificial neural network(ANN) and multiple linear regressions(MLR)

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Journal of Integrative Agriculture 2017年第7期16卷 1634-1644页

作者： ali mohammadi Torkashvand Abbas Ahmadi Niloofar Layegh Nikravesh Department of Soil Science Science and Research Branch Islamic Azad University Department of Soil Science University of Tabriz

Many properties of fruit are influenced by plant nutrition. Fruit firmness is one of the most important fruit characteristics and determines post-harvest life of the fruit, in recent decades, artificial intelligence systems were employed for developing predictive models to estimate and predict many agriculture processes. In the present study, the predictive capabilities of multiple linear regressions （MLR） and artificial neural networks （ANNs） are evaluated to estimate fruit firmness in six months, including each of nutrients concentrations （nitrogen （N）, potassium （K）, calcium （Ca） and magnesium （Mg）） alone （P1）, com- bination of nutrients concentrations （P2）, nutrient concentration ratios alone （P3）, and combination of nutrient concentrations and nutrient concentration ratios （P4）. The results showed that MLR model estimated fruit firmness more accuracy than ANN model in three datasets （P1, P2 and P4）. However, the application of P3 （N/Ca ratio） as the input dataset in ANN model improved the prediction of fruit firmness than the MLR model. Correlation coefficient and root mean squared error （RMSE） were 0.850 and 0.539 between the measured and the estimated data by the ANN model, respectively. Generally, the ANN model showed greater potential in determining the relationship between 6-mon-fruit firmness and nutrients concentration.

关键词： artificial neural network firmness fruit kiwi multiple linear regression nutrient

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Highly efficient bis(aminotropone) Ti catalyst for ethylene polymerization

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Chinese Chemical Letters 2011年第2期22卷 213-216页

作者： Reza Sandaroos Saman Damavandi ali Nazif Maraym Goharjoo ali mohammadi Department of Chemistry School of SciencesFerdowsi University of MashhadP.O.Box 91775MashhadIran Department of Chemistry Islamic Azad University of SarvestanSarvestanIran

Synthesis and structure of Ti complex having a pair of chelating aminotropone[O-N]ligand have been *** of density functional theory（DFT） studies suggest that bis（aminotropone） Ti complex,when activated with methylaluminoxane （MAO）,have high potential for the polymerization of olefinic *** theoretical studies also show that the active species derived from bis（aminotropone） Ti catalyst normally possess higher electrophilicity nature compared with those produced using bis（phenoxyimine） Ti complexes（Ti-FI catalysts） which are known as high performance olefin polymerization catalysts. Bis（aminotropone） Ti catalyst generates a catalytically active species that has higher electrophilicity than a Ti-FI catalysts.

关键词： Aminotropone Ethylene polymerization DFT studies PI catalysts

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Life history pattern of mosquitofish Gambusia holbrooki (Girard, 1859) in the Tajan River (Southern Caspian Sea to Iran)

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Chinese Journal of Oceanology and Limnology 2011年第1期29卷 167-173页

作者： PATIMAR Rahman GHORBANI Mohsen GOL-mohammadi ali AZIMI-GLUGAHI Hoda Gonbad Institutes of Higher Education Shahid Fallahy Street

Investigation of the ecology of introduced species in new habitats can allow determinations of the degree, direction, and rate of evolutionary change. The introduction of Gambusia holbrooki in the southern Caspian Sea presents such a situation. We evaluated the life history traits of mosquitofish in the Tajan River basin. A total of 744 G. holbrooki specimens were collected between January and December 2008. The maximum observed ages are 0+ years for males and 1+ years for females. Both sexes grew allometrically (negative for males: b=2.442 and positive for females: b=3.232). The overall sex ratio is unbalanced and dominated by females. GSI values suggest that this population of G. holbrooki matures between February–July. The highest mean GSI value is 1.80 for males and 15.97 for females in May. Egg diameter ranges from 1.00 to 3.00 mm with a mean value of 2.098 mm. Absolute fecundity varied from 7 to 57 eggs. Both ova diameter and absolute fecundity were positively correlated to fish size (length and weight). Fecundity relative to total weight fluctuated from 34.44 to 582.64 eggs/g, and to total length from 2.33 to 12.95 eggs/cm. Both were negatively correlated with female size. The characteristics of this population are important with respect to life history of the species.

关键词： Gambusia holbrooki age structure reproduction southern Caspian Sea Iran

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KAI（SO4）2-12H2O （Alum） Catalyzed One-Pot Three-Component Synthesis of 2-Alkyl and 2-Aryl-4（3H）-quinazolinone under Microwave Irradiation and Solvent Free Conditions

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Chinese Journal of Chemistry 2011年第9期29卷 1982-1984页

作者： mohammadi, ali A. Sadat Hossini, S. S.t Department of Chemistry Sabzevar Branch Islamic Azad University Sabzevar Iran University of Applied Science and Technology Tehran P.. O. Box 14155-1644 Tehran Iran

Twenty 2,3-disubstituted-4（3H）-quinazolinones were synthesed by one-pot three-component method with isa- toic anhydride, orthoesters and amines as raw materials in the presence of KAI（SO4）2·12H2O （Alum） under micro- wave irradiation and solvent-free conditions. 6-Bromo-2-propyl-3-p-tolylquinazolin-4（3H）-one （4m）, 6-bromo-2- methyl-3-phenethylquinazolin-4（3H）-one （4n） and 6-bromo-2-ethyl-3-phenethylquinazolin-4（3H）-one （40） were characterized by IR, 1H NMR, 13C NMR and elemental analysis.

关键词： isatoic anhydride orthoesters ammonium acetate 4(3H)-quinazolinone multi component micro-wave-assisted reactions

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Human dental pulp stem cells express many pluripotency regulators and differentiate into neuronal cells

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Neural Regeneration Research 2011年第34期6卷 2666-2672页

作者： Behnam Ebrahimi Mohammad Mehdi Yaghoobi ali mohammadi Kamal-abadi Maryam Raoofn Departmentof Biotechnology Research Institute for Environmental Sciences International Centre for Science High Technology and Environmental Sciences Kerman Iran Department of Biology Faculty of Sciences Shahid Bahonar University of Kerman Kerman Ira Oral and Dental Diseases Research Center/Department of Endodontics Kerman University of Medical Sciences Kerman Iran

Stem cells were isolated from human dental pulp using an optimized method, in which pulp pieces were digested by enzymes and immobilized to enhance cell outgrowth. Stem cell marker expression was detected by reverse transcription-PCR （RT-PCR）, and differentiation markers were detected by real-time quantitative RT-PCR and immunocytochemistry. Results showed that dental pulp stem cells actively expressed nanog, oct4, nucleostemin slain-l, jmjdla, jmjd2c, and cyclin DI. When stem cells were induced to differentiate into neurons, nucleostemin, nanog, and cyclin D1 expression significantly decreased, whereas expression of neuronal markers, such as microtubule associated protein-2 and neurofilament-heavy, significantly increased. These results suggested that stem cells exited a pluripotent state and entered a neuronal differentiation pathway. In addition, results demonstrated that human dental pulp serves as a reservoir of stem cells that express defined stem cell markers; these cells were easily isolated and were induced to differentiate towards a desired cell lineage.

关键词： dental pulp stem cell neural regeneration neuronal differentiation PluriNet real-time quantitative reverse transcription polymerase chain reaction stem cell marker

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The Effect of Variable Stator on Performance of a Highly Loaded Tandem Axial Flow Compressor Stage

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Journal of Thermal Science 2016年第3期25卷 223-230页

作者： Hamzeh Eshraghi Masoud Boroomand Abolghasem M.Tousi Mohammad Toude Fallah ali mohammadi Department of Aerospace Engineering and Centre of excellence on computational aerospace engineering Amirkabir University of Technology Nanotechnology Research and Application Center Sabanci University

Increasing the aerodynamic load on compressor blades helps to obtain a higher pressure ratio in lower rotational speeds. Considering the high aerodynamic load effects and structural concerns in the design process, it is possible to obtain higher pressure ratios compared to conventional compressors. However, it must be noted that imposing higher aerodynamic loads results in higher loss coemcients and deteriorates the overall performance. To avoid the loss increase, the boundary layer quality must be studied carefully over the blade suction surface. Employment of advanced shaped airfoils （like CDAs）, slotted blades or other boundary layer control methods has helped the de- signers to use higher aerodynamic loads on compressor blades. Tandem cascade is a passive boundary layer control method, which is based on using the flow momentum to control the boundary layer on the suction surface and also to avoid the probable separation caused by higher aerodynamic loads. In fact, the front pressure side flow momentum helps to compensate the positive pressure gradient over the aft blade＇s suction side. Also, in compari- son to the single blade stators, tandem variable stators have more degrees of freedom, and this issue increases the possibility of finding enhanced conditions in the compressor off-design performance. In the current study, a 3D design procedure for an axial flow tandem compressor stage has been applied to design a highly loaded stage. Following, this design is numerically investigated using a CFD code and the stage characteristic map is reported. Also, the effect of various stator stagger angles on the compressor performance and especially on the compressor surge margin has been discussed. To validate the CFD method, another known compressor stage is presented and its performance is numerically investigated and the results are compared with available experimental results.

关键词： Compressor Stage Highly Loaded Performance Characteristic Tandem Variable Stator

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