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Defence Technology（防务技术） 2024年第9期39卷 15-22页

作者： mohammad hossein.keshavarz Sedigheh Heydari Bani Reza Bakhtiari Seyyed Hesamodin hosseini Faculty of Applied Sciences Malek Ashtar University of TechnologyIsfahan 177415875Iran

Nitrogen-rich heterocyclic energetic compounds(NRHECs)and their salts have witnessed widespread synthesis in recent *** substantial energy-density content within these compounds can lead to potentially dangerous explosive reactions when subjected to external stimuli such as electrical ***,developing a reliable model for predicting their electrostatic discharge sensitivity(ESD)becomes *** study proposes a novel and straightforward model based on the presence of specific groups(-NH_(2) or-NH-,-N=N^(+)-O^(-)and-NNO_(2),-ONO_(2) or-NO_(2))under certain conditions to assess the ESD of NRHECs and their salts,employing interpretable structural *** a comprehensive dataset comprising 54 ESD measurements of NRHECs and their salts,divided into 49/5 training/test sets,the model achieves promising *** Root Mean Square Error(RMSE),Mean Absolute Error(MAE),and Maximum Error for the training set are reported as 0.16 J,0.12 J,and 0.5 J,***,the ratios RMSE(training)/RMSE(test),MAE(training)/MAE(test),and Max Error(training)/Max Error(test)are all greater than 1.0,indicating the robust predictive capabilities of the *** presented model demonstrates its efficacy in providing a reliable assessment of ESD for the targeted NRHECs and their salts,without the need for intricate computer codes or expert involvement.

关键词： Electrostatic discharge sensitivity Heterocyclic energetic compounds containing azole compound Interpretable structural parameter Safety

Cyclam Modified Carbon Paste Electrode as a Potentiometric Sensor For Determination of Cobalt(Ⅱ) Ions

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Chemical Research in Chinese Universities 2005年第1期21卷 28-31页

作者： Hamid Reza POURETEDAL mohammad hossein.keshavarz Chemistry Department Malek-ashtar University of Technology Shahin-shahr P. O. Box 83154/115 IranChemistry Department Malek-ashtar University of Technology Shahin-shahr P. O. Box 83154/115 Iran

A new modified carbon paste electrode based on cyclam as a modifier was prepared for the determination of Co(Ⅱ) ions. The proposed electrode shows a Nernstian slope 28.4 mV per decade over a wide concentration range 5.0×10 -6_1.0×10 -1 mol/L of Co 2+ ions with detection limit 2.5×10 -6 mol/L. The sensor exhibits good selectivities for Co 2+ over a wide variety of other cations. It can be used as an indicator electrode in potentiometric titration of cobalt(Ⅱ) ions as well as in direct determination of cobalt(Ⅱ) ions in wastewater of acidic cobalt electroplating bath. The electrode shows Nernestian behavior in a solution of 25% ethanol.

关键词： Carbon paste electrode Cyclam Potentiometry Cobalt

A functorial approach to categorical resolutions

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Science China Mathematics 2020年第10期63卷 2005-2016页

作者： Rasool Hafezi mohammad hossein keshavarz School of Mathematics Institute for Research in Fundamental Sciences(IPM)Tehran 19395-5746Iran

Using a relative version of Auslander’s formula,we give a functorial approach to show that the bounded derived category of every Artin algebra admits a categorical ***,in particular,implies that the bounded derived categories of Artin algebras of finite global dimension determine bounded derived categories of all Artin ***,this paper can be considered as a typical application of functor categories,introduced in representation theory by Auslander(1971),to categorical resolutions.

关键词： categorical resolutions Artin algebras Auslander’s formula

Wet carbon-based solid acid/NaNO_3 as a mild and efficient reagent for nitration of aromatic compound under solvent free conditions

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Chinese Chemical Letters 2007年第9期18卷 1064-1066页

作者： Arash Shokrolahi Abbas Zali mohammad hossein.keshavarz Chemistry Department Malek-ashtar University of TechnologyShahin-shahrP.O.Box 83145-115Iran

Nitro aromatic compound can be obtained in high yields via nitration of aromatic compound with wet carbon-based solid acid and NaNO_3 under solvent free oxidation at room temperature.

关键词： Carbon-based solid acid Sodium nitrate Nitration Solvent free conditions

Wet carbon-based solid acid/potassium permanganate as an efficient heterogeneous reagents for oxidation of alcohols under mild conditions

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Chinese Chemical Letters 2008年第11期19卷 1274-1276页

作者： Arash Shokrolahi Abbas Zali mohammad hossein.keshavarz Chemistry Department Malek-ashtar University of TechnologyShahin-shahrP.O.Box 83145-115Iran

Wet carbon-based solid acid and potassium permanganate were used as new reagents for oxidation of alcohols to their corresponding aldehydes and ketones in heterogeneous mixtures. The experiments were done moderately a... 详细信息

关键词： Carbon-based solid acid Potassium permanganate Oxidation Alcohols

Preparation and evaluation of a glycerol-preserved direct agglutination antigen for long-term preservation:a comparative study of the detection of anti-Leishmania infantum antibodies in human and dog

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Asian Pacific Journal of Tropical Medicine 2012年第2期5卷 117-120页

作者： Behnaz Akhoundi Mehdi Mohebali Gholam-hossein Edrissian mohammad-Bagher Eslami hossein.keshavarz hossein Malekafzali mohammad-Bagher Rokni Department of Medical Parasitology and Mycology School of Public HealthTehran University of Medical SciencesTehranIran Department of Pathobiology School of Public HealthTehran University of Medical SciencesTehranIran Department of Biostatistics and Epidemiology School of Public HealthTehran University of Medical SciencesTehranIran

Objective:To prepare and evaluate a glycerol-preserved antigen from an Iranian strain of Leishmania infantum(L infantum) for use in glycerol-preserved direct agglutination tests (GP-DAT) as an alternative to freeze dried direct agglutination teals(FD-DAT) that use freezedried ***:Glycerol-preserved DAT antigen was prepared and stored at different *** tested antigen stored at 4℃,22-37℃and 50℃over a period of 365 days. Seven hundred twenty-nine serum samples were collected from different geographical zones of Iran from 2007-2009,and 80 of these samples were pooled to produce *** pooled serum contained 10 *** positive and negative pooled sera were separately tested for anti-L. infantum antibodies with GP-DAT,FD-DAT and formaldehyde-fixed direct agglutination test (FF-DAT) antigens;tests were performed on both human and dog sera over a period of 12 months. Results:There was strong agreement between the results obtained using GP-DAT and FDDAT antigens stored at 22-37℃for 12 months for both human(100%) and dog(100%) pooled *** direct agglutination test results were highly reproducible(weighted kappa:GP=0.833, FD=0.979 and FF=0.917).Conclusions:Because GP-DAT antigen is highly stable over a range of temperatures and is easy to transport in the field,this type of antigen may be particularly useful in areas with endemic visceral leishmaniasis.

关键词： Leishmania infantum Direct agglutination test antigen Preservation Glycerol Iran

基于不同爆轰产物的格尼速度估算新方法(英文)

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含能材料 2006年第6期14卷 449-452页

作者： mohammad hossein.keshavarz Department of Chemistry Malek-ashtar University of Technology Shahin-shahr P.O. Box 83145/115 Islamic Republic of Iran

A new method for prediction of Gurney velocity of explosives is introduced in which energy output is correlated with the heat of detonation, the number of moles of gaseous products of detonation per gram of explosive and the average molecular weight of gaseous products. It is assumed that the CHNO explosive reacts to form products composed of N2, CO, H2O, CO2, H2, O2 and C（s） as determined by the oxygen balance of the unreacted compound. Good agreement is obtained between measured and calculated values of Gurney velocity as compared to previous correlations which assumed the reaction products to consist of N2, H2O, CO2 and either C（s） or O2.

关键词：爆炸物爆炸力学爆裂相关性

磺化多孔碳和过氧化氢催化氧化有机化合物(英文)

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催化学报 2010年第12期31卷 1427-1432页

作者： Arash SHOKROLAHI Abbas ZALI mohammad hossein.keshavarz Chemistry Department Malek-Ashtar University of Technology

The oxidation of organic compounds by sulfonated porous carbon and H2O2 was studied at room temperature. Alkyl and aryl sulfides were oxidized to the corresponding sulfoxides or sulfones in excellent yields. Secondary alcohols were also converted to the corresponding esters/lactones and aldehydes to methyl esters in good yields. Moreover,aliphatic tertiary amines and substituted pyridines were oxidized to N-oxides.

关键词： sulfonated porous carbon oxidation hydrogen peroxide sulfoxides sulfones ester N-oxide

高性能炸药3,6-双-(3,5-二硝基-1,2,4-三唑基)-1,2,4,5-四嗪的理论估算概述(英文)

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含能材料 2007年第5期15卷 551-554页

作者： mohammad hossein.keshavarz Department of Chemistry Malek-ashtar University of Technology

This work presents various aspect of properties of 3,6-bis-(3,5-dinitro-1,2,4-triazolyl)-1,2,4,5-triazine or BDTT,that has not been synthesized yet,as a novel energetic heterocyclic *** density,condensed phase heat of formation,detonation temperature,impact sensitivity,shock sensitivity based on small-scale gap test,adiabatic exponent and heat of detonation as well as detonation pressure and velocity that are important properties for explosive users are *** is shown that sensitivity of BDTT as a high performance explosive is less than HMX and ***,high oxygen content of BDTT can introduce it as suitable oxidizer to use in solid propellants.

关键词：高能炸药三唑基硝基四嗪爆炸性能灵敏性单元推进剂

Synthesis of Cobalt Chromite Nanoparticles by Thermolysis of Mixed Cr^(3+) and Co^(2+) Chelates of 2-Mercaptopyridin N-Oxide

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Nano-Micro Letters 2012年第2期4卷 83-89页

作者： mohammad.Edrissi Ahmad Reza keshavarz Chemical Engineering Department Amirkabir University of Technology

Pure greenish-blue cobalt chromite(Co Cr/_2O_4) nanoparticles with narrow particle range of 4.1±1.9nm and surface area of 78.2 m2·g-1were synthesized through mixed chelates thermolysis of corresponding metals using 2-Mercaptopyridine N-oxide sodium salt as chelating agent. During the thermolysis procedure,high amount of gases were emitted that led to the formation of nanoparticles with high surface area. The product was characterized by TGA, DTG, XRD, TEM, SEM, LLS, BET and chemical analysis. Design of experiments was performed to fulfill the two levels L_4 Taguchi design. It was found that the temperature and time of thermolysis process have significant effect on the particle size reduction. The Oxidation of trichloroethylene was carried out over Co Cr_2O_4 nanocrystallite. Catalytic activity analysis revealed that the synthesis Co Cr_2O_4 possesses high catalytic activity for this process.

关键词： CoCr2O4 Nanoparticle Chelates Termolysis Taguchi experimental design Combustion of trichloroethylene