学科分类
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8 个结果
  • 简介:InMarch2017,NarendraModiledhisBharatiyaJanataParty(BJP)tovictoryinstateelections,amongwhichhegainedparliamentaryelectionofUttarPradesh(stateinnorthernIndia),knownastheweathervaneofIndianelections.Backin2014,theBJPhadalreadywonasimplemajorityinLokSabha(thelowerhouseofparliament),bringinganendtomorethan30yearsofcoalitiongovernment.Now,theBJPisexhibitingstrongerpresenceasaone-party-ruleatbothfederalandlocallevels,withnocounter-balancefromtheIndianNationalCongress,localparties,orleftwingpartiesnoworintheforeseeablefuture.ThisincreasesthelikelihoodofModi'sre-electionasprimeministerin2019.Obviously,Indianpoliticaldevelopmentischaracterizedbycomplexity,accidentalfactorsandintrinsiclogic,whichwilldefinitelyexertgreatinfluenceonthefutureofIndia.

  • 标签: 印度人 政治 风向标 复杂性 逻辑性 偶然性
  • 简介:Thedevelopmentofcancernanotherapeuticshasattractedgreatinterestintherecentdecade.Cancernanotherapeuticshaveovercomeseverallimitationsofconventionaltherapies,suchasnonspecificbiodistribution,poorwatersolubility,andlimitedbioavailability.Nanoparticleswithtunedsizeandsurfacecharacteristicsarethekeycomponentsofnanotherapeutics,andaredesignedtopassivelyoractivelydeliveranti-cancerdrugstotumorcells.Weprovideanoverviewofnanoparticle-baseddrugdeliverymethodsandcancertherapiesbasedontumor-targetingdeliverystrategiesthathavebeendevelopedinrecentyears.

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  • 简介:Cancerisamajorhealthconcernandleadingburdenoneconomyworldwide.Anincreasingeffortisdevotedtoisolationanddevelopmentofplant-deriveddietarycomponentsaseffectivechemo-preventiveproducts.Phytochemicalcompoundsfromnaturalresourcessuchasfruitsandvegetablesareresponsiblefordecreasingtheriskofcertaincancersamongtheconsumingpopulations.Apigenin,aflavonoidphytochemicalfoundinmanykindsoffruitsandvegetables,hasbeenshowntoexertsignificantbiologicaleffects,suchasanti-oxidant,anti-inflammatoryandmostparticularlyanti-neoplasticproperties.Thisreviewisintendedtosummarizethemostrecentadvancesintheanti-proliferativeandchemo-preventiveeffectsofapigeninindifferentcancermodels.Analysisofthedatafromthestudiedcancermodelshasrevealedthatapigeninexertsitsanti-proliferativeeffectsthroughmultipleandcomplexpathways.Thisguidedustodiscoversomecontroversialresultsabouttheexactroleofcertainmolecularpathwayssuchasautophagyintheanticancereffectsofapigenin.Further,therewerecumulativepositiveevidencessupportingtheinvolvementofcertainpathwayssuchasapoptosis,ROSandDNAdamageandrepair.Apigeninpossessesahighpotentialtobeusedasachemosensitizingagentthroughtheup-regulationofDR5pathway.Accordingtothesepreclinicalfindingswerecommendthatfurtherrobustunbiasedstudiesshouldconsiderthepossibleinteractionsbetweendifferentmolecularpathways.

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  • 简介:在在参考书在中等Mn钢上总结相关研究以后,张力的性质上的二个新目标被定义。一个人两个都是那导致转变(旅行)并且导致双胞胎的粘性(缇)能与一个相对低的Mn内容为钢被认识到,它与更高的Mn内容展出类似的张力的性质到古典缇钢。其它将完成超离频的最终的张力的力量(>1.5?GPa)没有牺牲formability。达到这些目标,新设计策略为作文和处理线路被提出。特别地,因为前者能经由部分再结晶与不同形态学和尺寸生产保留的奥氏体谷物的混合物,温暖的滚动被采用而不是平常的热/冷的滚动过程。因而,保留的奥氏体谷物有大量技工稳定性以便他们能在变丑期间逐渐地转变到马氏体,导致提高的旅行效果然后改进技工性质。最后,它在在实验室生产这些指向的中等Mn钢被接替,他们中的一些甚至比我们的期望展出更好张力的性质。

  • 标签: 设计策略 实验室生产 评论 奥氏体 MN
  • 简介:CO2conversionviaphotocatalysisisapotentialsolutiontoaddressglobalwarmingandenergyshortage.PhotocatalysiscandirectlyutilizetheinexhaustiblesunlightasanenergysourcetocatalyzethereductionofCO2tousefulsolarfuelssuchasCO,CH4,CH3OH,andC2H5OH.Amongstudiedformulations,CubasedphotocatalystsarethemostattractiveforCO2conversionbecausetheCu-basedphotocatalystsarelow-costandabundancecomparingnoblemetal-basedcatalysts.Inthisliteraturereview,acomprehensivesummaryofrecentprogressonCu-basedphotocatalystsforCO2conversion,whichincludesmetalliccopper,copperalloynanoparticles(NPs),copperoxides,andcoppersulfidesphotocatalysts,canbefound.Thisreviewalsoincludedadetaileddiscussiononthecorrelationsofmorphology,structure,andperformanceforeachtypeofCu-basedcatalysts.Thereactionmechanismsandpossiblepathwaysforproductionsofvarioussolarfuelswereanalyzed,whichprovideinsightintothenatureofpotentialactivesitesforthecatalysts.Finally,thecurrentchallengesandperspectivefutureresearchdirectionswereoutlined,holdingpromisetoadvanceCu-basedphotocatalystsforCO2conversionwithmuch-enhancedenergyconversionefficiencyandproductionrates.

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  • 简介:Reversewatergasshift(RWGS)reactioncanbeservedasapivotalstageoftransitioningtheabundantCO2resourceintochemicalsorhydrocarbonfuels,whichisattractivefortheCO2utilizationandofeventuallysignificanceinenablingarebuiltecologicalsystemforunconventionalfuels.Thisconceptisappealingwhentheprocessisconsideredasasolutionforthestorageofrenewableenergy,whichmayalsofindavarietyofpotentialendusesfortheouterspaceexploration.However,abigchallengetothisissueistherationaldesignofhightemperatureendurableRWGScatalystswithdesirableCOproductselectivity.Inthiswork,wepresentacomprehensiveoverviewofrecentpublicationsonthisresearchtopic,mainlyfocusingonthecatalyticperformanceofRWGSreactionoverthreemajorkindsofheterogeneouscatalysts,includingsupportedmetalcatalysts,mixedoxidecatalystsandtransitionmetalcarbides.Thereactionthermodynamicanalysis,kineticsandmechanismsarealsodescribedindetail.Thepresentreviewattemptstoprovideageneralguidelineabouttheconstructionofwell-performedheterogeneouscatalystsfortheRWGSreaction,aswellasdiscussingthechallengesandfurtherprospectsofthisprocess.

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  • 简介:Co-electrolysisofCO2andH2Ousinghigh-temperaturesolidoxideelectrolysiscells(SOECs)intovaluablechemicalshasattractedgreatattentionsrecentlyduetothehighconversionandenergyefficiency,whichprovidesopportunitiesofreducingCO2emission,mitigatingglobalwarmingandstoringintermittentrenewableenergies.AsingleSOECtypicallyconsistsofanionconductingelectrolyte,ananodeandacathodewheretheco-electrolysisreactiontakesplace.Thehighoperatingtemperatureanddifficultactivatedcarbon-oxygendouble-bondofCO2putforwardstrictrequirementsforSOECcathode.Greateffortsarebeingdevotedtodevelopsuitablecathodematerialswithhighcatalyticactivityandexcellentlong-termstabilityforCO2/H2Oelectro-reduction.Thesofarcathodematerialdevelopmentisthekeypointofthisreviewandalternativestrategiesofhigh-performancecathodematerialpreparationisproposed.UnderstandingthemechanismofCO2/H2Oelectro-reductionisbeneficialtohighlyactivecathodedesignandoptimization.Thusthepossiblereactionmechanismisalsodiscussed.Especially,amethodincombinationwithelectrochemicalimpedancespectroscopy(EIS)measurement,distributionfunctionsofrelaxationtimes(DRT)calculation,complexnonlinearleastsquare(CNLS)fittingandoperandoambientpressureX-rayphotoelectronspectroscopy(APXPS)characterizationisintroducedtocorrectlydisclosethereactionmechanismofCO2/H2Oco-electrolysis.Finally,differentreactionmodesoftheCO2/H2OcoelectrolysisinSOECsaresummarizedtooffernewstrategiestoenhancetheCO2conversion.Otherwise,developingSOECsoperatingat300-600°CcanintegratetheelectrochemicalreductionandtheFischer-TropschreactiontoconverttheCO2/H2Ointomorevaluablechemicals,whichwillbeanewresearchdirectioninthefuture.

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