简介：Oximeswereoxidizedtothecorrespondingcarbonylcompoundsingoodtohighyieldsbyenvironmentallyfriendlyandgreenoxidant,H_2O_2catalyzedbymontmorilloniteK-10supportedcobalt(Ⅱ)chloride.

简介：合成了通式为K10H5[Ln(PMo7W2VO39)2].nH2O(Ln-La^3+,Ce^3+,Pr^3+,Nd^3+,Sm^3+,Eu^3+,Gd^3+,Dy^3+,Yb^3)的9种五元新型杂多配合物，并用元素化学分析，TG，ICP，IR，UV，31^1P,51V-NMR,ESR,XPS,XRD进行了表征，结果表明新配合物仍保持Keggin结构，稀土元素处于配合物的内界。借助TG－DTA，不同温度下的IR，XRD的水溶性实验考察了新配合物的热解性质，得出了热稳定的温度范围为400℃-500℃，为催化研究提供了依据。

简介：Anovelquaternarymetalselenide,K_2CdSnSe_4,wassynthesizedviaamolten-saltreactionat550℃.Thecompoundhasaone-dimensionalstructurecontainingachainof_∞~1[CdSnSe_4]~(2-)anionsseparatedbyK~+cations.ThecrystalbelongstothespacegroupI-42m,withtheunitcellparametersa=0.80298(11)nm,b=0.80298(11)nm,c=0.69217(14)nm,α=β=γ=90°.Areflectancespectroscopystudyrevealsthenatureofthesemiconductorwithanenergygapof1.7eVforthecompoundandithasastrongopticalabsorptioninarangeof2—5eV.

简介：Excessmolarvolume(VE)dataonbinaryliquidmixturesofmethylheptenone(MHO)withmethanol,ethanol,n-propanolorn-butanolhavebeendeterminedfromthedensitymeasurementsat298.15Kandatmosphericpressure.ThevaluesofVEinallthesystemsovertheentirecompositionrangearequantifiedbytheRedlich-Kisterequation.TheeffectsofthechainlengthofalkanolsonVEarediscussed.

简介：

简介：Ahighlysensitiveelectrochemiluminescence-polymerasechainreaction(ECL-PCR)methodforK-raspointmutationdetectionisdeveloped.Briefly,K-rasoncogenewasamplifiedbyaRu(bpy)32+(TBR)-labeledforwardandabiotin-labeledreverseprimer,andfollowedbydigestionwithMvaIrestrictionenzyme,whichonlycutthewild-typeampliconcontainingitscuttingsite.Thedigestedproductwasthenadsorbedtothestreptavidin-coatedmicrobeadthroughthebiotinlabelanddetectedbyECLassay.TheexperimentresultsshowedthatthedifferentgenotypescanbeclearlydiscriminatedbyECL-PCRmethod.Itisusefulinpointmutationdetection,duetoitssensitivity,safety,andsimplicity.

简介：过量音量(VE)，超声的速度(u)，isentropic压缩的可能性(K)和粘性()为有在303.15点的1,2-dichlorobenzene，1,3-dichlorobenzene，1,2,4-trichlorobenzene，o-chlorotoluene，m-chlorotoluene，p-chlorotoluene，o硝基甲苯和m硝基甲苯的dimethylformamide(DMF)的二进制混合物，K被学习。过量卷数据展览在为有1,2-dichlorobenzenes和1,3-dichlorobenzenes和性质的dimethylformamide的混合物的符号的倒置在为有1,2,4-trichlorobenzene，o硝基甲苯和m硝基甲苯的dimethylformamide的混合物的全部作文范围上是完全积极的。在另一方面，数量为有chlorotoluenes的dimethylformamide的混合物是否定的。Isentropic压缩的可能性(K)从精确健全速度和密度数据为一样的系统被计算了。进一步，从理想的行为的isentropic压缩的可能性(K)的偏差也是计算的。K值在在所有二进制混合物的全部音量部分范围上是否定的。试验性的健全速度数据以免费长度理论(FLT)和碰撞因素理论(CFT)被分析。粘性数据根据相应州的途径被分析。测量数据根据在不同分子之间的分子间的相互作用被讨论。

简介：IntroductionFritillariahupehensisHsiaoetK.C.HsiaisaliliaceousplantgrowinginthesouthwestdistrictofHubeiProvince,China.ItsbulbshavebeenrecordedinthePharmacopoeiaofthePeople′sRepublicofChinaasoneoftheprincipaltraditionalChineseherbsnamed"Hubeibeimu"[1].

简介：采用MTT法运用阔叶十大功劳逆转白血病细胞株K562/ADM对阿霉素（ADM）耐药活性进行评价,考察了阔叶十大功劳不同萃取分离部位对ADM的增敏活性.活性数据显示阔叶十大功劳的各提取部位均对K562/ADM细胞具有不同程度的增敏ADM活性.其中样品Ⅴ增敏活性最高,而样品Ⅴ中主要成分为生物碱类物质,这说明阔叶十大功劳中生物碱类成分具有逆转肿瘤细胞耐药活性.然而样品Ⅰ-Ⅴ逆转肿瘤细胞耐药活性差别不显著,这说明阔叶十大功劳中生物碱类成分含量丰富,在各个提取部位均大量存在,更适合全草入药,在逆转肿瘤细胞耐药方面具有非常好的潜在应用价值.

简介：Analternativerouteforthesynthesisof(-)-10-epi-ct-cyperone1startingfrom(+)-dihydrocarvone2isdescribedbyusinganasymmetricMichaeladditionasakeystep.Theroutefeaturesmoreefficientlyandcanbeperformedinlargescale.

简介：ＩｎｔｒｏｄｕｃｔｉｏｎＡｃｏｎｓｉｄｅｒａｂｌｅｉｎｔｅｒｅｓｔｈａｓｂｅｅｎｓｈｏｗｎｉｎｔｈｅｉｎｖｅｓｔｉｇａｔｉｏｎｏｆｍｉｘｅｄ－ｄｏｎｏｒｍａｃｒｏｍｏｌｅｃ－ｕｌａｒｌｉｇａｎｄｓｃｏｍｐｌｅｘｉｎｇｔｒａｎｓｉｔｉｏｎｉｏｎｓ［１］...

简介：与他们的各自的nucleosides，thymidine和cytidine一起的二嘧啶底胸腺嘧啶和cytosine的密度，超声的速度和粘性的试验性的决心面对三盐的不同集中在水的脲答案被执行了，viz。NaCl，KCl和CaCl2。试验性的数据被用于各种各样的热力学的参数的计算，viz。明显的臼齿的体积，明显的臼齿的压缩的可能性，系数A和Jones施舍方程的B，内部压力，声学的阻抗，等等。在调查下面的答案的结构的研究被紫外光谱学也执行了，并且被尝试了协作紫外光谱学的调查结果，结果热力学地获得了。

简介：N酰--hydroxy-4-phenyl-oxazolidinethiones能被处理很快在高收益变换成他们的乙醇thiol酉旨与在0è的EtSH

简介：Newmethodsfordehydrogenationofsteroidal2,5（10）-dieneswith2,3-dichloro-5,6-dicyano-1,4-benzoquinone（DDQ）orpyridiniumhydrobromideperbromide（PHP,Py·HBr·Br2）toaromaticAringsteroidinquantitativeyieldinshorttimearedescribed.

简介：过量臼齿的卷VmEand运动学的粘性为丙烯乙二醇monomethyl醚(1-methoxy-2-propanol)的二进制混合物作为作文的一个函数被测量了，MeOCH2CH(哦)我，丙烯乙二醇monoethyl醚(1-ethoxy-2-propanol)，EtOCH2CH(哦)我，丙烯乙二醇monopropyl醚(1-propoxy-2-propanol)，PrOCH2CH(哦)我，丙烯乙二醇monobutyl醚(1-butoxy-2-propanol)，BuOCH2CH(哦)我，和丙烯乙二醇tert丁基醚(1-tert-butoxy-2-propanol)，t-BuOCH2CH(哦)我与1-butanol臼齿的体积是的过量为系统2-butanol+1-methoxy-2-propanol，和+1-propoxy-2-propanol越过为有1-butanol的所有系统的全部范围ofcomposition否定、积极，为为系统2-butanol+1-ethoxy-2-propanol，和+1-tert-butoxy-2-propanol的系统2-butanol+1-butoxy-2-propanol，和变化符号否定。从试验性的数据，在从xii的动态粘性的偏差被计算了。两过量臼齿的卷和粘性偏差被方法用一个Redlich-Kister类型多项式方程相关为二进制系数和标准错误的评价最少平方。

简介：

简介：0.5%Pt-K/γ-Al2O3catalystsforthesynthesisofo-phenylphenol(OPP)fromo-cyclohexenyl-cyclohexanone(dimer)dehydrogenationwerepreparedbymeansofatwosubsequentimpregnationmethod.Theeffectsofcatalystpreparationparameters,suchasKpromoters,calcination,andreductionconditions,wereinvestigated.TheresultsshowedthattheadditionofK2SO4toPt/γ-Al2O3catalystnotablypromotedtheselectivityofOPP,anditsoptimumcontentwasfoundtobe6%inmassfraction.ThehigheractivitywasobtainedwhenPt/γ-Al2O3catalystwascalcinedinnitrogenatmosphereat400―500°Candthenreducedatthesametemperaturefor3hinhydrogenatmosphere.TheconversionofthedimerandtheselectivityofOPPwerealwaysabove99%and90%,respectively,over0.5%Pt-6%K2SO4/γ-Al2O3catalystduringthepilotscaletestof8000h.

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：ThecomplexK3H4GeW9V3O40·8H2OcrystallizedinamonocliiniesystemwithspacegroupP2,Mr=2784.67,a=11.099（3）,b=16.452（4）,c=13.534（4）,β=108.14°,Z=2,V=2348.493,F（000）:2456,μ=239.7cm-1,De=3.932g/cm3.ThefinalR=0.083for4528non-zeroreflexions.ThestructureofanionsGeW9V3O40andGeW9O34belongstoA--type.

简介：Theefficientcycloadditionreactionswerecarriedouttoaffordthenovel3,5-disubstituted-dihydroisoxazolesfrommethylundec-10-enoateandisoxazoles,triazoleandtetrazolo-triazolefrommethylundec-10-ynoate.Thereactionsoccurredunderrelativelymildconditionsandaffordedthedesiredproductsingoodyields.