简介:Inthepresentpaper,novelsidewallmaterialsforaluminumreductioncellwerepreparedinairusingmagnesiaandmagnetiteasstartingmaterials.ThesinteringbehaviorsofthespecimenswereinvestigatedbymeansofX-raydiffraction(XRD)andscanningelectronmicroscope(SEM).AndcorrosiontestsinaNa_3AlF_6-AlF_3-K_3AlF_6bathwereconductedtoevaluatetheelectrolytecorrosionresistance.TheresultsshowthattheFe_3O_4phaseistransformedintoFe_2O_3athightemperatures,whichinturnreactswiththeMgOaddedtoformMgFe_2O_4spinel.AndwithincreasingtheMgOcontentfrom0to30mass%,densificationofthespecimensdecreasesmainlyduetolargervolumeexpansionresultingfromformationofmoreMgFe_2O_4.ThecorrosiontestsshowthatcorrosionlayersareproducedinalltheMgOaddedspecimens.However,forspecimenscontainingMgFe_2O_4phaseonly,Mg(Al,Fe)_2O_4compositespinellayersarealsogenerated,whichremarkablyimprovethecorrosionresistanceofthespecimens.
简介:目的:探讨淫羊藿素(icrm)通过PI3K/AKT信号通路对非小细胞肺癌H460细胞增殖的影响。方法:采用MTT比色实验检测,不同浓度(0、5、10、20、40、80Jma/L)淫羊藿素处理H460细胞24、48、72h后细胞增殖抑制率,流式细胞仪检测不同浓度淫羊藿素对H460细胞凋亡的影响,Wetenblot实验检测不同浓度淫羊藿素对H460细胞中PI3K、AKT、p-AKT、Cleavd-Caspase-9蛋白质表达水平的影响。结果:淫羊藿素可抑制非小细胞肺癌H460细胞的增殖,并表现为剂量和时间依赖性(P<0.05)。0、5、10、20jmol/L淫羊藿素处理只460细胞2411后,只460细胞凋亡率分别为(4.90±1.20)%、(13.5±2.32)%、(16.47±1.90)%和(27.43±3.15)%'<0.05。淫羊藿素可下调?13民、人『1'的表达水平,降低人『1'的磷酸化^-人『1')水平,上调Clavd-Capae-9表达水平(P<0.05)。结论:淫羊藿素可能通过抑制TOKAKT信号通路激活,抑制H460细胞增殖。
简介:Inordertodeepentheunderstandingoftherelationshipbetweenfundamentalproperties(including:microstructureandcomposition)andphotocatalyticperformance,fourbismuthatecompounds,including:LiBiO3,NaBiO3,KBiO3,andAgBiO3,areregardedasresearchexamplesinthepresentwork,becausetheyhaveparticularcrystalstructuresandsimilarcompositions.Usingdensityfunctionaltheorycalculations,theirstructural,electronic,andopticalpropertiesareinvestigatedandcomparedsystematically.Firstofall,thecalculatedresultsofcrystalstructuresandopticalpropertiesareinagreementwithavailablepublishedexperimentaldata.Basedonthecalculatedresults,itisfoundthatthetunneledorlayeredmicro-structuralpropertiesleadtothestrongerinteractionbetweenbismuthandoxygen,andtheweakerinteractionbetweenalkaline-earthmetaland[BiO6]octahedron,resultinginthefeatureofmulti-bandgapsinthecasesofLiBiO3,NaBiO3,andKBiO3.ThisconclusionissupportedbythecaseofAgBiO3,inwhichthefeatureofmulti-bandgapsdisappears,duetothestrongerinteractionbetweenthenoblemetaland[BiO6]octahedron.Thesepropertieshavesignificantadvantagesinthephotocatalyticperformance:absorbinglowenergyphotons,rapidlytransferringenergycarriers.Furthermore,thefeaturesofelectronicstructuresofbismuthatecompoundsarewellreflectedbytheabsorptionspectra,whichcouldbeconfirmedbyexperimentalmeasurementsinpractice.Combinedwiththecalculatedresults,itcouldbeconsideredthatthecrystalstructuresandcompositionsofthephotocatalystdeterminetheelectronicstructuresandopticalproperties,andsubsequentlydeterminethecorrespondingphotocatalyticperformance.Thus,anovelBi-basedphotocatalystdrivenbyvisible-lightcouldbedesignedbyutilizingspecificcompositionstoformfavorableelectronicstructuresorspecificmicro-structurestoformabeneficialchannelforenergycarriers.
简介:一篇小说荧光灯为H2PO4-基于碳dots/Fe3+被设计并且制作合成。碳点被一个确定的一个壶综合热水的方法并且由传播电子显微镜,X光检查衍射计,紫外力的吸收分光计和荧光分光光度计描绘了。碳dots/Fe3+合成被碳点和FeCl3,的水的混合获得,它的荧光性质被荧光分光光度计描绘。碳点的荧光被水的Fe3+阳离子熄灭,导致碳dots/Fe3+的低荧光紧张合成。在另一方面,H2PO4-由化学反应减少了Fe3+的集中并且提高了碳dots/Fe3+的荧光合成。Stern-Volmer方程被介绍描述在合成的碳dots/Fe3+和H2PO4-,和好线性(R2=0.997)在H20.4-12公里的PO4-集中。
简介:摘要MAP3K1是促分裂原活化蛋白激酶的激酶的激酶(MAP3K)家族的一个成员,调节细胞凋亡、生存、迁移、分化等多重作用。MAP3K1既可以调节蛋白质磷酸化,又参与泛素-蛋白酶系统。全长MAP3K1调节细胞迁移,在半胱氨酸-天门冬氨酸蛋白酶(Caspase-3)酶切生成的C-端片段包含激酶结构域促进细胞凋亡。MAP3K1调节细胞命运的重要功能,意味着其可能是控制癌症的靶点。近期的大量基因组学研究,MAP3K1基因拷贝数异常、染色体突变、基因无效突变,发生在大量不同类型癌症。认识MAP3K1基因及其蛋白功能在不同类型癌症中的改变,为研究肿瘤细胞药物治疗靶点提供指导意义。