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Acta Biochimica et Biophysica Sinica 2006年第7期38卷 477-483页

作者： Razieh YAZDANPARAST majid mahdavi Mohammad Amin MOOSAVI Institute of Biochemistry and Biophysics University of TehranTehranlran

It has previously been shown that Dendrostellera lessertii（Thymelaeaceae）has stronganticancer *** this study,the antileukemic activity of another new compound from the same plantextract is ***（NB4 and HL-60）and erythroleukemia（K562）cells were cultured in thepresence of various concentrations of the new compound（0.5-3.0 μtg/ml）for *** cell numbers werethen determined by trypan blue exclusion *** new compound inhibited growth and proliferation ofNB4,HL-60 and K562 with IC50values of 1.5,2.0 and 2.5μg/ml,*** also found that the newcompound inhibited cell proliferation in a dose-and time-dependent *** low concentrations and after48h of treatment,approximately 50%-70% of NB4 and HL-60 cells were differentiated to monocyte/macrophage lineage and approximately 30%-40% of the treated K562 cells were differentiated in the mega-karyocytic lineage,as evidenced by morphological changes and nitro blue tetrazolium reduction *** of Hoechst 33258 staining also indicated that the new compound induced NB4 and HL-60 cellapoptosis at their respective IC50values after 72h of *** on the present data,the new com-pound seems a good candidate for further evaluation as an effective chemotherapeutic agent acting throughinduction of differentiation and apoptosis.

关键词： apoptosis Dendrostellera lessertii differentiation macrophage megakaryocyte

Guanosine 5'-triphosphate induces differentiation-dependent apoptosis in human leukemia U937 and KG1 cells

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Acta Pharmacologica Sinica 2006年第9期27卷 1175-1184页

作者： Razieh YAZDANPARAST Mohammad Amin MOOSAVI majid mahdavi Abbas LOTFI Institute of Biochemistry and Biophysics P O Box 13145-1384 University of TehranTehranIran National Research Center for Genetic Engineering and BiotechnologyP O Box 14155-6343 TehranIran

Aim:The differentiation capability of guanosine 5′-triphosphate（GTP）was stud-ied using U937 and KG1 ***:Cell cycle was analyzed by PI stainingusing flow *** was measured by Annexin-V-FITC/PI doublestaining using flow *** was observed by morphologicalcriteria,Wright-Giemsa staining and expression of cell surface markers CD 11b ***:Variable GTP concentrations（25-200 μmol/L）at short treatmenttimes（up to 24 h）showed significant anti-proliferative activities among both ***,longer treatment times（up to 72 h）were required to ***-cycle analyses of the GTP-treated cells indicated an increase in S-phase population by 48 h followed by the appearance of a sub-G1peak after 72hof *** effects of GTP on U937 and KG1 cells were accompanied withdifferentiation toward monocyte/macrophage *** was evidenced by asharp increase in the extent of CD 11b and CD 14 expression after 24 h of exposureto *** viability of both cell types did not significantly change during thefirst 24 ***,at longer treatment times（72-96 h）,dramatic decreases inboth the extent of CD14 expression and the cell viabilities were ***-taneous measurement of apoptosis and CD 14 expression in GTP-treated U937cells indicated that cells with lower CD14 content underwent more ***:These finding may pave the way for further pharmaceutical evalua-tion of GTP as a suitable differentiating agent for acute myeloblastic leukemia（AML）therapy.

关键词： apoptosis cell-cycle arrest guanosine 5’-triphosphate differentiation KG1 U937

SYNTHESIS AND APPLICATIONS OF CROSS-LINKED POLY(DIALLYLDIMETHYL AMMONIUM CHLORIDE) AND ITS DERIVATIVE COPOLYMERS AS EFFICIENT PHASE TRANSFER CATALYST FOR NUCLEOPHILIC SUBSTITUTION REACTIONS

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Chinese Journal of Polymer Science 2011年第2期29卷 165-172页

作者： Hossein mahdavi Mahdi Mahmoudian School of Chemistry University College of ScienceUniversity of TehranTehranIran

Cross-linked poly（diallyldimethylammonium chloride） and its derivative copolymers were synthesized and used as phase transfer catalyst in the nucleophilic substitution reaction especially halogen exchange *** additi... 详细信息

关键词： Poly(diallyldimethylammonium chloride) Phase transfer catalyst Nucleophilic substitution reaction Halogen exchange reaction

Ignition Conditions for Simulated Fuel Pellets in Degenerate Plasma

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Plasma Science and Technology 2013年第4期15卷 323-328页

作者： M. mahdavi A. GHOLAMI Physics Department Mazandaran University

A high-density, low-temperature plasma can be obtained during the compression phase in inertial confinement fusion. When high density and low temperature are reached in the plasma in the fast ignition approach, the plasma electrons can be degenerate. The electronic stopping of a slow ion is smaller than that given by the classical formula, because some transitions between the electron states are forbidden. In this case, bremsstrahlung emission is strongly sup- pressed and the ignition temperature becomes lower than that in classical plasma. The equations that predict the behavior of these plasmas are different from the classical ones, and this is the main factor in the process of decreasing the ignition temperature of the plasma. In this work, physical conditions of ignition are studied by calculating the effect of radiation loss on the ignition temperature for a simulated fuel pellet, （D/Tx/3Hey）, in degenerate plasma. In fast ignition, the energy needed for obtaining high densities is minimized and the gain can be increased considerably.

关键词： inertial fusion degenerate plasma ignition temperature bremsstrahlungemission

Differential expression of zinc accumulation during two growing seasons of Acacia victoriae

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Journal of Forestry Research 2015年第3期26卷 663-671页

作者： Ali mahdavi Khadijeh Khermandar Department of Forest Science Faculty of AgricultureUniversity of Ilam P.O. Box 69315-516 Ilam Iran Department Range and Watershed Management Faculty of Agriculture University of Ilam P.O. Box 69315-516 IlamIran

It is important to understand seasonal heavy metal accumulation in different parts of plants in order to develop the best phytoremediation practices for con- taminated soils. For this purpose we exposed, 1 year old A. victoriae seedlings to ZnSO4 in 4 different concentrations： 0, 50, 250 and 500 mg Zn L-1 for 45 days over two growing seasons. Subsequently, bioaccumulation of Zn in different plant tissues （roots, shoots and leafs） was assessed by Atomic Absorption Spectroscopy （AAS） for two peri- ods. In addition, various growth attributes （dry biomass, shoot and root lengths, plant appearance） and functional traits （leaf area, chlorophyll a, b and total） were measured. The accumulation of Zn was influenced by the Zn con- centration in the growth medium and the number of growing seasons. The amounts of Zn concentrated in the root tissues might indicate A. victoriae as a good option for phytostabilization of soils contaminated by Zn. We rec- ommend that if A. victoriae is used for phytoextraction purposes, then it should be harvested at the end of the first growing season （fall） because at this time the concentra- tions of Zn in the above-ground parts will be maximal.

关键词： Heavy metal Phytoremediation Phytoextracfion Phytostabilization

Investigation of thermal behavior of energetic and non-energetic binders on luminous efficiency of high performance miniature flares

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Defence Technology（防务技术） 2019年第2期15卷 193-197页

作者： Saeid Bagherpour Mohammad mahdavi Ebrahim Abedini Department of Chemistry Malek-ashtar University of Technology

Miniature flares containing magnesium/sodium nitrate compounded with different binders were studied for increasing luminosity and luminous efficiency in various fuel oxidizer ratio and flare *** polyester, Bisphenol-A epoxy resin, calcium resinate, and nitrocellulose were used as binders for construction the flares. Experimental results showed that luminous efficiency was higher for polyester based flares. Due to the difference in decomposition progress of various binders and the exothermic reaction between binder and oxidizer the luminous efficiency of the mixtures were 31000,28900, 27800 and 25100 cd respectively for polyester, epoxy, calcium resinate, and nitrocellulose. It was found that nitrocellulose as an energetic binder produces the highest light intensity in comparison to other binders, but the burning rate is higher and the burning time is lower than the other *** analysis of four binders showed that the heat of reactions was directly related to the amount of light output and luminosity.

关键词： Miniature flare Illuminating compositions Luminous efficiency Binder

Prediction of hydro-suction dredging depth using data-driven methods

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Frontiers of Structural and Civil Engineering 2021年第3期15卷 652-664页

作者： Amin mahdavi-MEYMAND Mohammad ZOUNEMAT-KERMANI Kourosh QADERI Water Engineering Department Shahid Bahonar University of KermanKerman***Iran

In this study,data-driven methods(DDMs)including different kinds of group method of data handling(GMDH)hybrid models with particle swarm optimization(PSO)and Henry gas solubility optimization(HGSO)methods,and simple equations methods were applied to simulate the maximum hydro-suction dredging depth(h_(s)).Sixty-seven experiments were conducted under different hydraulic conditions to measure the h_(s).Also,33 data samples from three previous studies were *** model input variables consisted of pipeline diameter(d),the distance between the pipe inlet and sediment level(Z),the velocity of flow passing through the pipeline(u_(0)),the water head(H),and the medium size of particles(D_(50)).Data-driven simulation results indicated that the HGSO algorithm accurately trains the GMDH methods better than the PSO algorithm,whereas the PSO algorithm trained simple simulation equations more *** all used DDMs,the integrative GMDH-HGSO algorithm provided the highest accuracy(RMSE=7.086 mm).The results also showed that the integrative GMDHs enhance the accuracy of polynomial GMDHs by∼14.65%(based on the RMSE).

关键词： sedimentation water resources dam engineering machine learning heuristic

Weibel Instability Growth Rate in Magnetized Plasmas with Quasi-Relativistic Distribution Function

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Communications in Theoretical Physics 2016年第12期65卷 709-712页

作者： Sayed Ahmad Hosseini Mohammad mahdavi Physics Department University of Mazandaran

The mechanism of the Weibel instability is investigated for dense magnetized plasmas. As we know, due to the electron velocity distribution, the Coulomb collision effect of electron-ion and the relativistic properties play an important role in such study. In this study an analytical expression for the growth rate and the condition of restricting the Weibel instability are derived for low-frequency limit. These calculations are done for the oscillation frequency dependence on the electron cyclotron frequency. It is shown that, the relativistic properties of the particle lead to increasing the growth rate of the instability. On the other hand the collision effects and background magnetic field try to decrease the growth rate by decreasing the temperature anisotropy and restricting the particles movement.

关键词： background Weibel instability coulomb collision growth rate quasi-Maxwellian

Application of digital techniques to identify aquifer artificial recharge sites in GIS environment

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International Journal of Digital Earth 2013年第6期6卷 589-609页

作者： A.mahdavi S.H.Tabatabaei R.mahdavi M.R.Nouri Emamzadei Department of Water Engineering Shahrekord UniversityShahrekordIran Department of Natural Resources Engineering Hormozgan UniversityBandar AbbasIran

Because the groundwater is considered as the major source of 99%of all retrievable fresh water,optimization of its usage would be very ***water artificial recharge(GAR)using surface water is the recommended solution because that increases the aquifer *** of aquifer storage site is the first step in designing GAR *** main objective of this research is the identification of suitable GAR sites scattered in the Shahrekord plain,Chaharmahal-va-Bakhtiari province of Iran,using Boolean and Fuzzy *** affecting GAR including ground surface slope,soil infiltration rate,vadoze zone thickness,electrical conductivity of the surface water,land-use,and stream network were *** provision of digital maps,they were classified,weighted,and integrated through Boolean and Fuzzy *** result revealed almost 4.25%of the whole plain area is appropriate for GAR based on ***,4.79 and 17.94%of the plain area are suitable and rather favorable,respectively,based on ***,34 locations were introduced with priorities A,B,and AB as being potentially suitable for *** relationship between geomorphology and suitable areas for GAR based on Boolean and Fuzzy method indicated that the majority of these areas were located on colluvial fans units.

关键词： groundwater artificial recharge Fuzzy and Boolean logic geomorphology Shahrekord plain

Linear OPF-based Robust Dynamic Operating Envelopes with Uncertainties in Unbalanced Distribution Networks

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1320-1326页

作者： Bin Liu Julio H.Braslavsky Nariman mahdavi Energy Centre Commonwealth Scientific and Industrial Research Organisation(CSIRO)Newcastle 2300Australia the Network Planning Division TransgridSydney 2000Australia the Energy Systems Program Energy CentreCommonwealth Scientific and Industrial Research Organisation(CSIRO)Newcastle 2300Australia

Dynamic operating envelopes(DOEs),as key enablers to facilitate distributed energy resource(DER)integration,have attracted increasing attention in the past ***,uncertainties,which may come from load forecasting errors or inaccurate network parameters,have been rarely discussed in DOE calculation,leading to compromised quality of the hosting capacity allocation *** letter studies how to calculate DOEs that are immune to such uncertainties based on a linearised unbalanced three-phase optimal power flow(UTOPF)*** uncertain parameters constrained by norm balls,formulations for calculating robust DOEs(RDOEs)are presented along with discussions on their *** cases,including a 2-bus illustrative network and a representative Australian network,are tested to demonstrate the effectiveness and efficiency of the proposed approach.

关键词： Distributed energy resource(DER) dynamic operating envelope(DOE) feasible region robust optimisation uncertainty modelling unbalanced optimal power flow