简介：Enterococcusfaecalis(E.faecalis)isamicroorganismthatcansurviveextremechallengesinobturatedrootcanals.Theaimofthisstudywastoevaluatetheefficacyofanon-thermalatmosphericpressureplasmaplumeagainstE.faecalisinvitro.Anon-thermalatmosphericpressureplasmajetdevicewhichcouldgenerateacoldplasmaplumecarryingapeakcurrentof300mAwasused.TheantibacterialefficacyofthisdeviceagainstE.faecalisanditsbiofilmunderdifferentconditionswasdetected.TheantibacterialefficacyoftheplasmaagainstE.faecalisandStaphylococcusaureus(S.aureus)wasalsoevaluated.Afterplasmatreatment,theaveragediameterofinhibitionzoneonS.aureusandE.faecaliswas2.62±0.26cmand1.06±0.30cm,respectively(P<0.05).Thediameterwasincreasedwithprolongationofthetreatmentduration.ThediametersofinhibitionzoneofthesealedPetridisheswerelargerthanthoseoftheuncoveredPetridishes.Therewassignificantdifferenceincolony-formingunitsbetweenplasmagroupandcontrolgrouponE.faecalisbiofilm(P<0.01).ThetransmissionelectronmicroscopyrevealedthattheultrastructuralchangescytodermofE.faecaliswereobservedaftertreatmentfor2min.Itisconcludedthatthenon-thermalatmosphericpressureplasmacouldserveasaneffectiveadjuncttostandardendodonticmicrobialtreatment.

简介：Amulti-objectivehybridgeneticbasedoptimizationalgorithmisproposedaccordingtothemulti-objectivePropertyofinverseplanning.Itisbasedonhybridadaptivegeneticalgorithmwhichcombinesthesimulatedannealing,usesadaptivecrossoverandmutation,andadoptsnichedtournamentselection.Theresultoftheteatcalculatationdemonstratesthatanexcellentconvergingspeedcanbeachievedusingthisapproach.

简介：A1-Dfluidmodelforhomogeneousdielectricbarrierdischarge(DBD)inheliumispresented,aimedatunravelingthespatial-temporalcharacteristicsoftwobasicdischargeregimes:single-breakdownandmulti-breakdowndischarges.Dischargecurrents,gapvoltages,chargedensities,electrontemperatureandelectricfieldprofilesofthetworegimesmakeitclearthatthesetworegimesarequalitativelydifferent.Itisfoundthatthemulti-breakdowndischargehasamorehomogeneousfluxondielectricscomparedtothesingle-breakdowndischarge.

简介：Removalofsinglecomponentandbinarymixturesofbenzeneandm-xyleneusingamulti-pin-meshreactorwasstudiedtofindthedecompositioncharacteristics,carbonbalanceandCO_2selectivity.Thedecompositionrateofbenzeneinmixturewasapproximately16%lowerthanthatofsinglecomponentbenzene.However,thedecompositionrateofm-xyleneinmixturewasslightlyhigherthanthatofsinglecomponentm-xylene.Carbonbalanceofthemixturedecompositionprocessachievedalowerlevelthanthatofsinglecomponentbenzene/m-xylene.IncreaseinthespecificinputenergywashelpfultoimproveCO_2selectivityinthesinglecomponentdecompositionprocess,whilethespecificinputenergyhadanegligibleeffectonCO_2selectivityinthemixturedecompositionprocess.Bychangingtheoxygencontentinbackgroundgas,wefoundthatdifferenttypesofradicalsshoweddifferentreactionactivitiestowardbenzeneandm-xylene.Benzenewasmorelikelytoreactwithnitrogen-containingradicals,whilem-xylenewasmorelikelytoreactwithoxygen-containingradicals.

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简介：2004年11月5日，中国原子能科学研究院举行2004年游泳池反应堆(SPR)场区应急演习，国家环保总局核安全司及核安全中心有关专家到现场进行监督评价。此次演习自早9：30分开始至10：45分结束，历时75分钟，验证了原子能院核事故应急计划的有效性、检查应急组织的应急响应能力。

简介：(2011年8月1日)近期发生的数起安全事故,凸显出安全的重要性,尤其是核安全的极端重要性。3月11日发生的日本福岛核事故,教训非常深刻。7月23日发生的甬温铁路特别重大交通事故,尽管不是核事故,也给核行业以极大的警示和启示。在去年核工业创建55周年座谈会上,张德江副总理谈到,他主要担心两个领域出现安全问题,一个是高铁,一个是核电。言犹在耳,果然这两个领域都出了重大问题,只不过一个是在国内,另一个是在国外。两起事故都让我们立即联想到了我国的核安全,引发了广

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