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1.
0Introduction Porphyrinderivativeshavebeenusedasphotosensitizersinphotodynamictherapy(PDT),anewapproachdevel opedforthetreatmentofcancer[1].Cationwater solublepor phyrinsareofconsiderableinterestowingtotheirpossiblebio medicalapplications[2].Inwhich,theinhibiteffectonthe growthmetabolismofE.coliandcancercellHL60ofmeso tetra(4N ethylacetatepyridyl)porphyrin(H2NEAE pp)and itsZn(Ⅱ)complexform(ZnNEAE pp)havebeenrecentlyin vestigated[3,4].Toenhancetumor locationandanticancerac tivitiesofdr…  相似文献   

2.
报导了稀土Yb( )与系列氨基多羧酸类配体形成配合物的分子和晶体结构.根据九配位K3[Yb(nta)2(H2O)].5H2O(nta=氨三乙酸),(NH4)4[Yb2(dtpa)2].9H2O(dtpa=二乙三胺五乙酸),和八配位Na3[Yb(nta)2].6H2O,K3[Yb(nta)2].5H2O,NH4[Yb(Cydta)(H2O)2].5H2O(Cydta=反式-1,2-环己二胺四乙酸)配合物的结构,探索了稀土金属离子Yb( )与一系列氨基多羧酸类配体形成配合物的配位规律.  相似文献   

3.
人血清白蛋白(HAS)是血液循环系统中最丰富的运输蛋白质,它可以与许多内源性和外源性物质结合起到贮存和转运的作用[1].核苷类化合物具有广泛的生物活性,在抗肿瘤、抗病毒和抗艾滋病药物中占有重要的地位.9-n-丁基-6-[N,N-二(2-羟基乙基)氨基]嘌呤(BP)是一种新型核苷类药物.  相似文献   

4.
Elastic-plastic torsion problem and some stochastic control problem can be reducedto elliptic equations with gradient constraint, which were studied in [2],[1]. In linear case, the existence of W~(1,∞)∩W_(10c)~(2,p) strong solution was obtained in [1].This result was improved and W_(10c)~(2,∞) regularity was obtained in [8]. The gradient obstacle problem of qusilinear elliptic equation was discussed in [9].The W~(1,∞)∩W_(10c)~(2,∞) strong solution exists under the restriction that the leading  相似文献   

5.
IntroductionAlkalinephosphatase(AP)hasbeenthoughttobeimportantintheprocessofbiocalcification[1].APwasthefirstenzymeassociatedwithcalcificationactivityintissuesandremainsasthebestcharacterizedenzymeinthecalcificationprocess.Yet,importantquestionsabouttheroleofthisproteininbiocalcificationremainunanswered,anditcontinuestodrawfocusedattentionincalcifiedtissueinvestigations[2].APpromoteshydrolysisofphosphatecontainingsubstrates[1],producesorthophosphateandcausesariseininorganicphosphateandtherem…  相似文献   

6.
抗癌药物与DNA分子间的相互作用研究,对阐明药物抗癌活性的机制以及以DNA为靶分子的药物筛选都具有非常重要的意义[1].目前的研究方法主要有吸收光谱法、荧光光谱法、拉曼光谱法、圆二色谱法等[2].  相似文献   

7.
Introduction Powerconsumptionhasbecomeagreatconcerninchip design.Inordertocomputepowerdissipation,wehaveto firstlycalculatenodeswitchingactivityEn(sw).FromEq.1 En(sw)canbeestimatedthroughprob(n)[2]andtherefore thepowerdissipationcanbeobtainedthroughEq.2[3]. En(sw)=2prob(n)(1-prob(n))(1) Pavg=0.5V2ddfclkCloadE(SW)(2) Thereareseveralmethodsincalculatingprob(n) includingtheapplicationofMarkovchain,theentropyapproach,andothers[1].Yettwoimportantproblemsarise whenapplyingthesea…  相似文献   

8.
Introduction  Arealquadraticfieldk=Q(D0)iscalledanERD-typeifitsdiscriminantD0canberepresentedasD0=N2±r,wherer|4N.OnecanfindthefundamentalunitofanERD-fieldexplicitly.ForexamplesseeRefs.[14].AfieldKofdegree2niscalledoftype(2,2…,2)(nfold)ifKcanbeexpressedasacompositionofnquadraticnumberfieldsanditsGaloisgroupisGal(K/Q)≌(Z/2Z)n.WadadevelopedamethodtocomputethefundamentalunitsofK[5].Followingthismethod,Frei[1,2]andLiu[3]determinedthefundamentalunitsofthefieldsK=Q(D2 md,D2 nd)explic…  相似文献   

9.
Introduction  Mostpreviouslyreportedchiralliquidcrystalswerelaterallyunsubstitutedormono-substituted[1].Certainlaterallydifluoro-substitutedsystems(ondifferentrings)haveanS*CAphase[2].TheS*CSAS*AN*IsequencediscoveredinaTGBAsystembyBouchta[3]wasduetolateralfluoro-substituents,whichsuggeststhatlateralfluoro-substitutentsdonotsimplylowerthemeltingpointsandcompresstheformationoftheunderlyingsmecticphases,butinfluencethemesomorphiccharactertoagreaterextent.Amongthesechiralliquidcrystals,th…  相似文献   

10.
A.连续出版物(期刊、报纸)中的析出文献[序号]析出文献主要责任者.析出文献题名[文献类型标志].连续出版物题名:其他题名信息,年,卷(期):起止页码[引用日期].获取和访问路径.[1]袁庆龙,侯文义.N i-P合金镀层组织形貌及显微硬度研究[J].太原理工大学学报,2001,32(1):51-53.[2]傅  相似文献   

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