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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

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

Prediction of malaria cases in the southeastern Iran using climatic variables:An 18-year SARIMA time series analysis

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Asian Pacific Journal of Tropical Medicine 2021年第10期14卷 463-471页

作者： Hamid Reza Tohidinik hossein keshavarz Mehdi Mohebali Mandana Sanjar Gholamreza Hassanpour HIV/STI Surveillance Research Center and WHO Collaborating Center for HIV SurveillanceInstitute for Futures Studies in HealthKerman University of Medical SciencesKermanIran Center for Research of Endemic Parasites of Iran(CREPI) Tehran University of Medical SciencesTehranIran Department of Medical Parasitology&Mycology School of Public HealthTehran University of Medical SciencesTehranIran

Objective:To predict future trends in the incidence of malaria cases in the southeast of Iran as the most important area of malaria using Seasonal Autoregressive Integrated Moving Average(SARIMA)model,and to check the effect of meteorological variables on the disease ***:SARIMA method was applied to fit a model on malaria incidence from April 2001 to March 2018 in Sistan and Baluchistan province in southeastern *** variables such as temperature,rainfall,rainy days,humidity,sunny hours and wind speed were also included in the multivariable model as ***,the best fitted model was adopted to predict the number of malaria cases for the next 12 ***:The best-fitted univariate model for the prediction of malaria in the southeast of Iran was SARIMA(1,0,0)(1,1,1)12[Akaike Information Criterion(AIC)=307.4,validation root mean square error(RMSE)=0.43].The occurrence of malaria in a given month was mostly related to the number of cases occurring in the previous 1(p=1)and 12(P=1)*** inverse number of rainy days with 8-month lag(β=0.3292)and temperature with 3-month lag(β=-0.0026)were the best predictors that could improve the predictive performance of the univariate ***,SARIMA(1,0,0)(1,1,1)12 including mean temperature with a 3-month lag(validation RMSE=0.414)was selected as the final multivariable ***:The number of malaria cases in a given month can be predicted by the number of cases in the prior 1 and 12 *** number of rainy days with an 8-month lag and temperature with a 3-month lag can improve the predictive power of the model.

关键词： Malaria Time series SARIMA Forecasting Climate Iran

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

Spatial outline of malaria transmission in Iran

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Asian Pacific Journal of Tropical Medicine 2012年第10期5卷 789-795页

作者： Mohammad Barati hossein keshavarz-valian Majid Habibi-nokhandan Ahmad Raeisi Leyla Faraji Abdoreza Salahi-moghaddam Department of Medical Parasitology and Mycology Tehran University of Medical Sciences(TUMS)Iran Climatological Research Institute MashhadIran Malaria Control Program Center for Diseases Management and Control(CDMC)TehranIran Malaria Control Program Center for Disrases Management and Control(CDMC)TehranIran Dept.of Pathobiology Hormozgan University of Medical Sciemces(HUMS).Bandar AbbasIran

Objective:To conduct for modeling spatial distribution of malaria transmission in Iran. Methods:Records of all malaria cases from the period 2008-2010 in Iran were retrieved for malaria control ***&*** data including annual rainfall,maximum and minimum temperature,relative humidity,altitude,demographic,districts border shapefiles. and NDVI images received from Iranian Climalologic Research *** arranged in ArcCIS. Results:Results:99.65%of malaria transmission cases were focused in southeast part of Iran. These transmissions had statistically correlation with altitude(650 m),maximum(30℃),minimum (20℃) and average temperature(25.3℃).Statistical correlation and overall relationship between NDVI(118.81),relative humidity(≥45%) and rainfall in southeast area was defined and explained in this ***:According to ecological condition and mentioned cut-off points, predictive map was generated using rokriging method.

关键词： Malaria Iran GIS MEWS Epidemiology Mapping