简介：Polyamide/acrylonitrile-butadiene-styrenecopolymer(PA/ABS)blendshavedrawnconsiderableattentionfrombothacademiaandindustryfortheirimportantapplicationsinautomotiveandelectronicareas.DuetopoormiscibilityofPAandABS,developinganeffectivecompatibilizationstrategyhasbeenanurgentchallengetoachieveprominentmechanicalproperties.Inthisstudy,wecreateasetofmechanicallyenhancedPA6/ABSblendsusingtwomulti-monomermelt-graftedcompatibilizers,SEBSg-(MAH-co-St)andABS-g-(MAH-co-St).Thedisperseddomainsizeissignificantlydecreasedandmeanwhiletheunique“softshell-encapsulating-hardcore”structuresforminthepresenceofcompatibilizers.Theoptimummechanicalperformancesmanifestanincreaseof36%intensilestrengthandanincreaseof1300%inimpactstrength,comparedwiththeneatPA6/ABSbinaryblend.

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简介：6,9,11-Trihydroxy-6a,12a-dehydrorotenoid1(coccineoneB)wassynthesizedfrom2-hydroxybenzaldehyde2andphloroglucinol.

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简介：Quasiclassicaltrajectorycalculation(QCT)isusedfrequentlyforstudyingcollisionalenergytransferbetweenhighlyvibrationallyexcitedmoleculesandbathgases.Inthispaper,theQCToftheenergytransferbetweenhighlyvibrationallyexcitedC6F6andN2,O2andgroundstateC6F6wereperformed.TheresultsindicatethathighlyvibrationallyexcitedC6F6transferredvibrationalenergytovibrationaldistributionofN2,O2andgroundstateC6F6,sotheyareV-Venergytransfer.EspeciallyitismainlyV-VresonanceenergytransferbetweenexcitedC6F6andgroundstateC6F6,excitedC6F6transfersmorevibrationalenergytogroundstateC6F6thantoN2andO2.ThevaluesofQCT,-〈△Evib〉ofexcitedC6F6aresmallerthanthoseofexperiments.

简介：(-)-(5R,6S)-6-Acetoxyhexadecan-5-olide1,anaturalmosquitoattractantpheromone,wassynthesizedfromreadilyavailablealdehyde2andcyclopentanone3usingL-proline-catalyzedasymmetricaldolreactionasthekeystep.

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简介：Thenovelcomplex[K(18-C-6)]2[Cd(mnt)2][18-C-6-18-crown-6,nmt=1,2-dicyanoethene-1,2-dithiolate,C2S2-(CN)2^2-]wassynthesizedandcharacterizedbyelementalanalysis,IRspectrumandX-raydiffractionanalysis.Thecomplexdisplaystwo-dimensionalnetworkstructureof[K(18-C-6)]complexsegmentsand[Cd(nmt)2]complexsegmentbridgedbyS-K-S,S-K-NandN-K-Ninteractionsbetweenadjacent[K(18-C-6)]and[Cd(mnt)2]units.

简介：有CuBr2和CdI2催化的公司的1-bromo-6-chlorohexane的Photopromotedcarbonylation在周围的条件下面被执行了。结果显示carbonylation在CuBr2的催化作用下面继续chloroesterClCH2(CH2)5COOCH3的主要产品。而且，carbonylation的活动能被基本添加剂的增加改进(NaOAc，Na3PO4或(n-C4H9)3N)。在这些添加剂之中，(n-C4H9)3N以ClCH2(CH2)5COOCH3的收益是最有效的。然而，代替BrCH2(CH2)5COOCH3的氯产品的methoxycarbonyl没面对CdI2被获得。这与monochloroalkane的carbonylation相当不同。

简介：ＤｉｍｅｒｉｚａｔｉｏｎＣｏｎｓｔａｎｔＤｅｔｅｒｍｉｎａｔｉｏｎｏｆ６－Ｏ－Ｂｅｎｚｏｙｌ－β－ＣｙｃｌｏｄｅｘｔｒｉｎｉｎＡｑｕｅｏｕｓＳｏｌｕｔｉｏｎ.ＤｉｍｅｒｉｚａｔｉｏｎＣｏｎｓｔａｎｔＤｅｔｅｒｍｉｎａｔｉｏｎｏｆ６－Ｏ－Ｂｅｎｚｏｙｌ?..

简介：Poly-3-methylthiophene(P3MT)在房间温度被综合离子的液体1-butyl-3-methylimi-dazoliumhexafluorophosphate([BMIM]PF6)由经常的潜在、经常的电流分别地。P3MT电影的结构和形态学被FTIR光谱和SEM描绘。undoped(减小)并且做(氧化)在离子的液体准备的P3MT电影的形式可逆、稳定。P3MT电影有维生素酸和罐头的electrocatalytic氧化的强壮的特征分开维生素酸和多巴胺的氧化山峰。潜在的步的二个方法被用来观察这部电影的反应时间，这部电影被发现有完美的electrochromic反应。

简介：对金银花中Mn,Fe,Cu,Zn,Ca和Mg6种金属元素的化学形态进行了分析。用传统的煎煮法把元素提取以后,分别采用0.45μm微孔滤膜、LSA-10大孔吸附树脂柱、正辛醇/水分配体系,以区分元素的可溶态和悬浮态、有机态和无机态、醇溶态和水溶态,最后用火焰原子吸收光谱法（FAAS）对湿法消解以后的各种元素进行测定。结果表明,6种元素的提取率在14.97%～48.54%,悬浮态的颗粒吸附率在4.02%～19.84%,加标回收率在96.58%～103.9%,RSD（n=6）≤2.4%。

简介：利用PCR以实验室构建的原核重组表达质粒pProEX-OCIF为模板扩增得到N末端融合有6×His标签和rTEV蛋白酶识别序列的人破骨细胞形成抑制因子(OsteoclastogenesisInhibitoryFactor,简称OCIF)结构域D1～D6(简称OCIFm)编码基因片段;将其与pMD18-T连接,转化大肠杆菌TOP10,筛选得到阳性重组质粒pMD18-OCIFm,双酶切重组克隆质粒pMD18-OCIFm得到OCIFm基因片段;将其定向插入甲醇营养型酵母分泌表达载体pPIC9中,构建获得重组表达质粒pPIC9-OCIFm.测序验证后,以限制性内切酶SalⅠ线化,电穿孔转化酵母宿主菌GS115.筛选得到阳性表达菌株后,甲醇诱导表达4d,SDS-PAGE和Westernblot对表达情况进行分析和确认.所获得的OCIFm基因片段在甲醇营养型酵母中表达量占菌体总蛋白的30%以上.利用Ni-NTA树脂对表达产物进行一步亲和层析纯化.活性测定表明纯化的表达产物可诱导体外培养的成熟破骨细胞样细胞的凋亡.表达产物的生物学活性较利用原核表达系统明显提高.

简介：AseriesofdoubleperovskitesRSrMnFeO_6(R=La,Pr,Nd,Sm)wassynthesizedundermildhydrothermalconditions.Crystalgrowthsofthesamplesweresensitivetoalkalinity,temperature,fillingfraction,andcompositionofinitialreactionmixture.ThedesiredseriesofcompoundsbelongstotheclassofAA'BB'O_6perovskiteswitharandomdistributionofMnandFeatomsovertheB-cationsub-lattice.TheirstructuresshowthedistortedorthorhombicsymmetrywithspacegroupPnma.TheshapesandsizesofthecrystalswereanalyzedonaRigakuJSM-6700Fbyscanningelectronmicroscopy.AnalysisdonebyXPS,MssbauerspectroscopyandiodometrictitrationrevealsthatMnandFeionshave+4and+3oxidationstates,respectively.

简介：Onenewsesquiterpenecompound,namely,illihenlactoneA（1）,andonenewprenylatedC6–C3compound,illihenryioneH（2）,alongwiththreeknownsesquiterpenes（3–5）wereisolatedfromthestemsofIlliciumhenryi.Thestructuresof1and2wereelucidatedbyspectroscopicevidenceincludingNMR,HRESIMSandcirculardichroism（CD）.Compound2exhibitedaweakinhibitoryratioforbglucuronidasereleaseinducedbyplatelet-activatingfactor（PAF）inratpolymorphonuclearleukocytes（PMNs）invitro.

简介：采用微波消解技术,建立了电感耦合等离子体质谱法同时测定大米中Pb,Cd,As,Tl,Cr和V6种重金属元素的方法.完善了样品前处理条件,优化了仪器工作参数,并选取115In,209Bi和45Sc作为内标元素,有效地克服了基体效应和仪器波动的影响.在最优的实验条件下,方法的检出限为0.067～27.5ng/L,测定元素的标准曲线相关系数均大于0.999.方法经国家一级植物标准物质验证,结果与推荐值相符.

简介：采用Tessier连续提取法对延安市污水处理厂污泥中的Zn、Cu、Cr、Cd、Pb和Mn六种重金属元素进行形态提取，并用电感耦合等离子体发射光谱（ICP—AES）法对其中各元素的总量及其形态进行测定。结果表明：Pb、Cd多以可交换态、碳酸盐结合态存在，分别占总量的76．84％和78．59％，对生物具有潜在有效性。Zn、Cu、Cr多以稳定的硫化物及有机结合态和残渣态存在，不易迁移到环境中去。

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简介：用量子化学原理,CIS/6-31＋G（d,p）方法研究了2-甲基环戊酮离子前6个激发态的解离过程,通过虚频的振动分析,计算其可能产物,寻求2-甲基环戊酮离子的解离通道和解离产物.

简介：Inanattempttofindnewantitumoragents,anovelclassofchromonecompoundswithabenzimidazoleorabenzoxazoleringinpositions2or6weresynthesizedviacondensationinpolyphosphoricacid(PPA)byusingchromoneacidsasthestartingmaterials.Duringthepreparationprocess,itwasfoundthatPPAcouldcleavethechromoneringtoproducearing-openingcompound(6).Themolarratioofthechromonecompound(5)tothering-openingcompound(6)variedwiththechangeofreactiontemperatureandtime.BasedonMTTprotocol,theantitumoractivityofeachofthecompoundsobtainedwasevaluatedagainstthreehumancancercelllines:KB(oralepidermal),A2780(ovary)andBel7402(liver).TheIC50variedfrom54.7μmol/Ltomorethan180μmol/L.