简介:Weexperimentallydemonstratea4×4nonblockingsiliconthermo-optic(TO)switchfabricconsistingofthreestagesoftunablegeneralizedMach–Zehnderinterferometers.All24routingstatesfornonblockingswitchingarecharacterized.Thedevice’sfootprintis4.6mm×1.0mm.Measurementsshowthattheworstcrosstalkofallswitchingstatesis-7.2dB.Theon-chipinsertionlossisintherangeof3.7–13.1dB.TheaverageTOswitchingpowerconsumptionis104.8mW.
简介:Thesynthesisofopen-fiameworkmetalphosphateshasbeenasubjectofintenseresearchowingtotheirinterestingstructuralchemistryandpotentialapplicationsasionexchangers,catalystsandadsorbents.Alargenumberofthesematerialsaresynthesizedinthepresenceoforganicaminesasstructure-directingagents.Recently,manyresearchactivitieshavefocusedonthesynthesisofinorganic-organichybridframeworks.Ascomparedwithinorganicligands,theadvantageofusingorganicmultidentateligandsistheefficacyofrationaldesignofcrystallinesolidsthroughtheircoordinatingpropensitiesandgeometries.
简介:Thesynthesisandphasebehaviorofaseriesof4’-alkyloxy-4-hydroxybiphenylswerediscribed.Theeffectsofreactionconditionsontheyieldsofproductswereinvestigated.Thecharacterizationsofthermotropicliquidcrystallineproductsforthetypeandthermalpropertiesarediscussedthroughtheuseofdifferentialscanningcalorimetry,polarizingmicroscopy.
简介:Reactionsofthe6-hydroxy-thiopyrano[3,4-c]pyridine-5-carbonitrilederivative1withα-halo-carbonylcompoundsgavetheortho-substitutedintermediates2a-cwhichwereconvertedintofuro[2,3-b]thiopyrano[4,3-d]pyridines3a-cbyfusionofafuranmoietyunderbasicconditions.Furthercyclizationof3a-cledtoafusionofapyrimidinering,yieldingthetetracyclicproducts6,7and8.Inaddition,condensationof6withvariousaromaticaldehydesaffordedthecorrespondingimines9a,b.Mannichreactionof7gaveproducts10a,b.
简介:Thestructureofpolyimidefrom1,4-bis(3’,4’-dicarboxyphenoxy)benzeneand4,4’-oxydianilinefilmspecimensbeforeandafterhotstretchinghasbeeninvestigatedbyWAXD,DSCandFTIR.AsevidencedbyboththeWAXDandDSCresults,itcouldbebelievedthatstraininducedcrystallizationdidtakeplaceafterhotstretching.Meanwhile,shiftingpositionandsplittingofsomebandpeaksexistedontheFTIRspectrogramswereexplainedintermsoftheclosepackingofchainsandthechangesofinter-molecularcharge-transferinteractionbetweenimidegroupsandaromaticgroupsuponcrystallization.
简介:像使用费的受体(TLR)是主人防卫系统的哨兵,它认出很多微生物引起的病原体。主机防卫系统可能是低效的或如果由TLR和随后的被触发TLR的cytokine生产的微生物引起的识别是deregulated,煽动性的疾病可以发展。激活抄写因素4(ATF4),ATF/CREB抄写因素家庭的一个成员,是参予几个pathophysiological过程的一个重要因素。在这份报告,我们发现ATF4也涉及调停TLR的天生的有免疫力的反应,它参予TLR4信号transduction并且调停许多cytokines的分泌物。我们观察到ATF4被激活并且translocates到经由TLR4-MyD88-dependent小径跟随lipopolysaccharide(LPS)刺激的原子核。另外,cytokine数组试金证明某关键煽动性的cytokines例如IL-6,IL-8和RANTES,被ATF4断然调整。我们也证明c6月直接绑在ATF4,从而支持煽动性的cytokines的分泌物。一起拿,这些结果显示ATF4在被触发TLR4的cytokine充当一个积极管理者生产。
简介:2003年12月,绰号“国王”的勒布郎·詹姆斯为NIKE代言的第一款鞋AIRZOOMGENERATION全球同步首发。且不说詹姆斯在入选NBA以前所造成的人气旋风,单他加入NBA后的全能表现,就足以让球迷们欣慰没有白为他疯狂一场。由此,他为NIKE代言的第一款球鞋也受到全球追捧,毕竟他跟NIKE签的是令人乍舌的9000万美金肥约。发售当天,北京东方新天地居然出现彻夜排队购买的球迷,北京限量发售的120双鞋子很快就被购买一空,受欢迎程度堪比“国王”本人,以至于现在市面上这款鞋子还有些断货。不过4月份,NIKE公司将会推出这款鞋子的全黑版,在运动球鞋搭配色调越来越花哨,甚至可以用艳俗来称呼的时候,黑白主色的球鞋倒是愈发显得经典。就像去年市场大卖而奥斯卡折戟的《指环王》一样,其第三部曲《国王归来》在本届奥斯卡大获全胜,毫无疑问,也叫“国王”的詹姆斯,会以这款新鞋再次领衔流行市场。