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.
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简介:Excessmolarvolume(VE)dataonbinaryliquidmixturesofmethylheptenone(MHO)withmethanol,ethanol,n-propanolorn-butanolhavebeendeterminedfromthedensitymeasurementsat298.15Kandatmosphericpressure.ThevaluesofVEinallthesystemsovertheentirecompositionrangearequantifiedbytheRedlich-Kisterequation.TheeffectsofthechainlengthofalkanolsonVEarediscussed.
简介:神经生长禁止的因素(GIF),metallothionein家庭的一个成员(metallothionein-3,MT3),由它的不同神经生长众所周知禁止的活动,它没被另外的MTisoforms显示出。到现在为止,然而,人们仍然不清楚地知道GIF怎么施加它的生物功能。因为GIF力量用作没有scavenger,这被报导了并且与锌的版本有关,我们的学习被与没有施主的SNOCa类型学习人的GIF和人的MT1g的反应集中于GIF和号码的相互作用,GIF是比向SNOC的MT-1g更反应的,这被发现。为了进一步弄明白,如果在这反应的GIF的高反应源于酸硷的催化作用,几异种被构造:E23K,E41G/E43A,E23K/E41G/E43A。由向SNOC学习他们的基本性质和反应,GIF的S-nitrosylation与酸硷的催化作用有关,这被发现不仅,而且到metal-thiolate簇的可接近性。
简介:AhighlyefficienttotalsynthesisofS-(+)-tylophorinehasbeenaccomplishedinfullyasymmetricfashion.
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:INthepreviouspapersoftheauthor’s,theelementaryreactionoperatorconcerningpointgroupwasdiscussed.Inthispaper,morecomplexreactionoperatorswillbeanalysed.Byusingtheskillinreactionoperator,theelectrocyclicandcy-cloadditionreactionsareillustrated.
简介:Baker'syeastmediatedreductionofopticallyactivediketoneisdescribed.Thetwoketogroupsareefficientlydifferentiatedandtheeevalueoftherecoveredmaterialisconsiderablyraised.Itaffordshighlyopticallyactivekeyintermediatesefficientlyforthesynthesisofnaturalpolyhydroxylatedagarofuranproducts.
简介:Achiralrutheniumcomplex[(1S,2S)-DPEN]-RuCl_2(PPh_3)_2(DPEN=1,2-diphenylethylenediamine,PPh_3=triphenylphosphine)wasencapsulatedinthechannelofAl-MCM-41byelectrostaticadsorptionand1,1-dichlorosilacyclobutanemodification.Thepreparedheterogeneouscatalystshowedthesamecatalyticactivityandenantioselectivityasthecorrespondinghomogeneouscatalystintheasymmetrichydrogenationofacetophenone,andcouldbereusedatleastseventimeswithoutsignificantlossofcatalyticactivityandenantioselectivity.