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High-frequency induction hea.ed sintering of ba.l milled Fe-WC na.ocomposites

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Interna.iona. Journa. of Minera.s,Meta.lurgy a.d Ma.eria.s 2013年第7期20卷 693-699页

作者： M. Za.eri T. Za.ga.eh a. najafi Cera.ic Depa.tment Materials and Energy Research Center P.O. Box 31787/316 Karaj Iran Depa.tment of Ma.eria.s Saveh Branch Islamic Azad University Saveh Iran

Fe-WC na.ocomposites were successfully fa.rica.ed by high-frequency induction hea.ed sintering of ba.l milled na.ostructure powders. The ba.l milled powders were cha.a.terized by X-ra. diffra.tion. Density mea.urements by the a.chimedes method show tha. a.l sintered sa.ples ha.e the rela.ive density higher tha. 95%. Studies on the effects of WC content, milling speed, a.d milling time indica.e tha. a.higher milling speed a.d a.more WC content lea. to the improvement of mecha.ica. properties. There is a.very good distribution of WC pa.ticles in the Fe ma.rix a. the milling speed of 650 r/ra.n. For the sintered sa.ple 20-5-650 （20wt% WC, milling time of 5 h, a.d milled speed of 650 r/min）, the ma.imum Brinell ha.dness a.d yield stress a.e obta.ned to be 3.25 GPa.a.d 858 MPa. respectively. a.l sintered sa.ples ha.e brittle fra.ture during compression test except the sa.ple 20-5-650.

关键词： na.ocomposites meta.lic ma.rix composites iron tungsten ca.bide induction hea.ing sintering mecha.ica.properties

The Effect of Tra.ning a.d Community Ba.ed Ma.a.ement on Ea.thqua.e Impa.ts on Environmenta. Resources

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Journa. of Environmenta. Science a.d Engineering 2010年第10期4卷 70-77页

作者： H.T. Mogha.da. H.R. Mora.i a.E. Sa.i P.G. Sa.ta.shi a. najafi Depa.tment of Wa.ershed Ma.a.ement a.d Environment Engineering College of Natural Resource and Marine Sciences TarbiatModares University Noor lran

Disa.ters ha.e been defined a. ecologica. disorders or emergencies, which lea. to disea.e incidence, da.a.e or injury a.d loss of property. Ira. is loca.ed in a.region prone to ea.thqua.e ha.a.d a.d ha. fa.ed severa. tra.ic ea.thqua.es in its history which ha.e led to morta.ities a.d destruction of na.ura. a.d socio-economic resources. Severa. resea.ches ha.e shown the positive effect of tra.ning in decrea.ing nega.ive impa.ts of disa.ters. In societies where people a.e properly tra.ned a.d obta.n necessa.y informa.ion a.out how to rea.t in ca.e of ea.thqua.e or other na.ura. disa.ters, the ra.e of fa.a.ities would be significa.tly decrea.ed. Ea.thqua.e is not a.preventa.le na.ura. disa.ter. So the only wa. to decrea.e its nega.ive consequences would be effective prepa.edness. Public tra.ning is the ma.n wa. of enha.cing the a.a.eness to the whole society a.d is the core of disa.ter pla.ning. In this resea.ch, the a.m is to eva.ua.e the effect of tra.ning on the knowledge a.d pra.tice of people vulnera.le to ea.thqua.es.

关键词： Ea.thqua.e vulnera.ility community-ba.ed ma.a.ement tra.ning

a.Qua.tum Chemica. Investiga.ion on the a.tioxida.t a.tivity of Licoisofla.one Deriva.ives

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Chinese Journa. of Structura. Chemistry 2013年第9期32卷 1404-1414页

作者： Ma.IHE najafi MEYSa. najafi MOHa.Ma. najafi Depa.tment of Ma.hema.ics Anar Branch Islamic Azad University

In this pa.er,21 substituents with va.ious electron dona.ing a.d electron withdra.ing cha.a.ters were pla.ed in the a.a.la.le positions of Licoisofla.one in order to study their effect on the three O–H bond dissocia.ion entha.pies a.d ionisa.ion potentia. via.DFT/B3LYP *** show tha. the B-ring is more importa.t tha. the a.ring from the BDE a.d IP point of view beca.se the ra.ica. structure formed a.ter hydrogen a.om a.stra.tion from the 4-OH group ca. be sta.ilized by the resona.ce between the three *** results show tha. intra.olecula. hydrogen bonding effects a.e a.le to considera.ly sta.ilize the pa.ents a.d *** NBO a.a.ysis results a.so confirmed the intra.olecula. hydrogen bond *** forma.ion of strong intra.olecula. hydrogen bonds a.d suita.le spin density distributions in severa. ra.ica.s result in low BDE a.d IP *** ca.cula.ed BDE a.d IP va.ues ha.e been correla.ed with Ha.mett *** found dependencies a.e suita.ly linea.,which ca. be importa.t for the synthesis of novel a.tioxida.ts ba.ed on Licoisofla.one.

关键词： a.tioxida.t licoisofla.one hydrogen Bond substituent effect

Theoretica. Investiga.ion of Hydrogen Sulfide a.sorption on the Surfa.e of F Functiona.ized Ca.bon a.d Ca.bon Silicon Na.otubes (7,0) in the Ga. Pha.e a.d Wa.er

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Chinese Journa. of Structura. Chemistry 2017年第3期36卷 387-395页

作者： MEYSa. najafi Young Resea.chers a.d Elite Club Kermanshah BranchIslamic Azad University Kermanshah Iran

In order to develop a.sensor for the detection of toxic H_2S molecule,the intera.tions of C–NT a.d CSi–NT with H_2S molecule were investiga.ed by density functiona. theory ca.cula.ions. The effects of F functiona.iza.ion a.d wa.er on the a.sorption of H_2S ga. on C–NT a.d CSi–NT surfa.es were investiga.ed. The studied na.otubes ca. intera.t with the H_2S molecule effectively a.d so a.sorptions of H_2S on studied na.otubes a.e exothermic a.d possible from the energetic viewpoint. Repla.ing the C a.oms of C–NT with Si a.oms ma. be a.good stra.egy for improving the sensitivity of C–NT towa.ds H_2S. F functiona.iza.ion a.d wa.er ca.se a. increa.e a.d decrea.e in the a.solute a.sorption energy（Ea.） va.ues of H_2S on the studied na.otubes,respectively. There a.e good linea.ity dependencies between Ea. a.d orbita. energy va.ues of studied na.otubes. The Ea. a.d orbita. energy va.ues of studied na.otubes ca. be considered a. importa.t pa.a.eters to propose suita.le na.otubes with increa.ed potentia. of H_2S a.sorption.

关键词： DFT wa.er na.otube H_2S functiona.iza.ion

Studies on the a.ility of Ca.bon Na.otube(5,5) a. Drug Ca.rier a.d a.tica.cer Properties of Benzylthio-indolyl-tria.ol-a.ine Deriva.ives

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Chinese Journa. of Structura. Chemistry 2017年第10期36卷 1679-1684页

作者： MEYSa. najafi Young Resea.chers a.d Elite Club Kermanshah Branch Islamic Azad University Kermanshah Iran

The a.tica.cer a.tivities of synthesized benzylthio-indolyl-tria.ol-a.ine deriva.ives 1a.1c were investiga.ed via.theoretica. sca.es. The experimenta. results show tha. deriva.ive 1a.ha. the highest a.tica.cer a.tivity, a.d 1c ha. the lowest one. The intera.tions of 1a.1c with C-na.otube（5,5） were investiga.ed. a.so the qua.tum molecula. descriptors of deriva.ives 1a.1c were ca.cula.ed a.d the results show tha. they ca. intera.t with C-na.otube（5,5） effectively. The a.sorptions of 1a.1c on C-na.otube（5,5） surfa.e were exothermic a.d experimenta.ly possible from the energetic viewpoint. The results indica.ed tha. ΔEa. a.d ΔGa. va.ues of deriva.ive 1a.on C-na.otube（5,5） were higher tha. those of the corresponding deriva.ives 1b a.d 1c, so 1a.ha. the highest ｜μ｜, ω a.d ｜？N｜ va.ues a.d the lowest va.ue, a.d the trends of theoretica. a.tica.cer a.tivities of 1a.1c a.e simila. to the experimenta. va.ues successfully.

关键词： benzylthio-indolyl-tria.ol-a.ine a.sorption energy na.otube a.tica.cer a.d chemica. potentia.

a.tioxida.t Properties of Substituted Thymols a.d Their a.sorption on a.uminum Phosphide(a.P)Na.otube(8,0)a. Controlled Drug Delivery Device:Theoretica. Study in Ga. Pha.e a.d Etha.ol

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Chinese Journa. of Structura. Chemistry 2017年第2期36卷 197-203页

作者： MEYSa. najafi Medica. Biology Resea.ch Center Kermanshah University of Medical SciencesKermanshah 67149-67346Iran

We ha.e studied the a.sorption of thymol deriva.ives on a.P-na.otube surfa.e by using density functiona. ca.cula.ions in ga. pha.e. a.so the a.tioxida.t a.tivity of thymol wa. investiga.ed in ga. pha.e a.d etha.ol. The effects of NMe2, OEthyl a.d Me substituents on the a.tioxida.t a.tivity a.d a.sorption a.ility of thymol on a.P-na.otube were investiga.ed. Results show tha. a.P-na.otube ca. effectively intera.t with substituted thymols, so their a.sorptions a.e exothermic a.d experimenta.ly possible from the energetic viewpoint. Results a.so show tha., repla.ing NMe2 group in the x position of thymol ma. be a.good stra.egy to improve the sensitivity of thymol towa.d a.P-na.otube surfa.e. The NMe2 a.d OEthyl substitutions decrea.e the BDE a.d IP va.ues a.d increa.e the a.tioxida.t a.tivity of thymol. The BDE a.d IP va.ues of thymols ha.e linea. dependencies with corresponding Ea. va.ues. These ca. be utilized to select novel thymol deriva.ives with higher a.tioxida.t a.tivity a.d drug delivery a.ility.

关键词： na.otube etha.ol viewpoint a.sorption utilized a.tioxida.t towa.d substituted a.pa.ent energetic

a.sorption of Synthesized Pyridinyl-pyra.oleca.box a.ide Deriva.ives a. a.ti-funga. on the Surfa.e of Ge-na.otube(6,6)

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Chinese Journa. of Structura. Chemistry 2017年第10期36卷 1673-1678页

作者： MEYSa. najafi Young Resea.chers a.d Elite Club Kermanshah Branch lslamic Azad University Kermanshah Iran

The a.ti-funga. a.tivities of synthesized pyridinyl-pyra.ole-ca.box a.ide deriva.ives 1a.1c were investiga.ed via.theoretica. pa.a.eters. The obta.ned results in present pa.er were compa.ed with the reported experimenta. results. Experimenta. results show tha. deriva.ive 1a.ha. the highest a.d deriva.ive 1c the lowest a.ti-funga. a.tivity. The intera.tions of deriva.ives 1a.1c with Ge-na.otube（6, 6） were investiga.ed, a.d a.so qua.tum molecula. descriptors of deriva.ives 1a.1c were ca.cula.ed. Results show tha., deriva.ives 1a.1c ca. intera.t with Ge-na.otube（6, 6） effectively, a.d their a.sorptions were exothermic a.d possible from the theoretica. viewpoint. The a.solute ΔEa. a.d ΔGa. va.ues of deriva.ive 1a.on Ge-na.otube（6, 6） were higher tha. the a.solute ΔEa. a.d ΔGa. va.ues of 1 b a.d 1c. Deriva.ive 1a.ha. the highest a.solute μ, ω a.d ΔN va.ues. The theoretica. a.d experimenta. trends of a.ti-funga. a.tivity of deriva.ives 1a.1c were simila., successfully.

关键词： pyridinyl-pyra.ole-ca.box a.ide a.sorption energy na.otube a.ti-funga. a.d chemica. potentia.

Study of Oxida.ion of Ca.bon Monoxide on the Surfa.e of Sn-doped Ca.bon Na.otube

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Chinese Journa. of Structura. Chemistry 2019年第4期38卷 524-532页

作者： MEYSa. najafi Medica. Biology Resea.ch Center Kermanshah University of Medical Sciences

In recent yea.s, the discovery of suita.le ca.a.yst to the oxida.ion of ca.bon monoxide(CO) is a.ma.or concern in industry. In present study, in the first step the ca.bon na.otube(CNT) with Sn wa. doped a.d the surfa.e of Sn-CNT via.O_2 molecule wa. a.tiva.ed. In the second step the CO oxida.ion on the surfa.e of Sn-CNT via.La.gmuir Hinshelwood(LH) a.d Eley Ridea.(ER) mecha.isms wa. investiga.ed. Results show tha. O_2-Sn-CNT ca. oxidize the CO molecule via.Sn-CNT-O-O* + CO → Sn-CNT-O-O*-CO → Sn-CNT-O* + CO_2 a.d Sn-CNT-O* + CO → Sn-CNT + CO_2 rea.tions. Results show tha. CO oxida.ion on a.tiva.ed Sn-CNT surfa.e via.the ER mecha.ism ha. lower energy ba.rier tha. LH mecha.ism. Fina.ly, ca.cula.ed pa.a.eters revea. tha. a.tiva.ed Sn-CNT is a. a.cepta.le ca.a.yst with high potentia. to the oxida.ion of CO molecule.

关键词： ca.a.yst na.ostructure meta. a.sorption oxida.ion rea.tion a.sorption energy

a.tioxida.t a.tivity of Sesa.ol Deriva.ives a.d Their Drug Delivery via.C60 Na.oca.e: a.Theoretica. Study

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Chinese Journa. of Structura. Chemistry 2019年第2期38卷 195-200,165页

作者： MEYSa. najafi Medica. Biology Resea.ch Center Kermanshah University of Medical Sciences

The a.tioxida.t a.tivity of sesa.ol deriva.ives a.d their drug delivery via.fullerene were investiga.ed. Fullerene ca. intera.t with sesa.ol deriva.ives, a.d their a.sorptions were possible from the energetic viewpoint. a.ding the NH_2 group to sesa.ol ca. improve the sensitivity of sesa.ol towa.d fullerene surfa.e. The NH_2 a.d OMe substitutions increa.e the a.tioxida.t a.tivity of sesa.ol. The results ca. a.so be used to select novel sesa.ol deriva.ives with higher a.tioxida.t a.tivity a.d higher drug delivery a.ility.

关键词： drug delivery fullerene sesa.ol a.sorption energy a.d wa.er