The objective of this research paper is to study numerical relationships between a block of a finite group and a defect group of such block. We define a new notion which is called a strongly k(D)- block and give a nec...The objective of this research paper is to study numerical relationships between a block of a finite group and a defect group of such block. We define a new notion which is called a strongly k(D)- block and give a necessary and sufficient condition of a block with a cyclic defect group to be a k(D) -block in term of its inertial index. We believe that the notion and the results in this work will contribute to the developments of the theory of blocks of finite groups.展开更多
Nanostructure fabrication from block copolymers in my group normally involves polymer design, synthesis, self-assembly, selective domain crosslinking, and sometimes selective domain removal. Preparation of thin films ...Nanostructure fabrication from block copolymers in my group normally involves polymer design, synthesis, self-assembly, selective domain crosslinking, and sometimes selective domain removal. Preparation of thin films withnanochannels was used to illustrate the strategy we took. In this particular case, a linear triblock copolymer polyisoprenc-block-poly(2-cinnamoylethyl methacrylate)-block-poly(t-butyl acrylate), PI-b-PCEMA-b-PtBA, was used. Films, 25 to50 μm thick, were prepared from casting on glass slides a toluene solution of PI-b-PCEMA-b-PtBA and PtBA homopolymer,hPtBA, where hPtBA is shorter than the PtBA block. At the hPtBA mass faction of 20% relative to the triblock or the totalPtBA (hPtBA and PtBA block) volume fraction of 0.44, hPtBA and PtBA formed a seemingly continuous phase in the matrixof PCEMA and Pl. Such a block segregation pattern was locked in by photocrosslinking the PCEMA domain. Nanochannelswere formed by extracting out hPtBA with solvent. Alternatively. larger channels were obtained from extracting out hPtBAand hydrolyzing the t-butyl groups of the PtBA block. Such membranes were not liquid permeable but had gas permeabilityconstants ～6 orders of magnitude higher than that of low-density polyethylene films.展开更多
目的 :评价乙肝疫苗联合不同剂量乙型肝炎免疫球蛋白(hepatitis B immunoglobulin,HBIG)对HBV母婴阻断的效果,探讨有效经济的联合免疫阻断方法。方法:将HBsAg阳性母亲的新生儿随机分为100 IU HBIG免疫组和200 IU HBIG免疫组,分别在出生1...目的 :评价乙肝疫苗联合不同剂量乙型肝炎免疫球蛋白(hepatitis B immunoglobulin,HBIG)对HBV母婴阻断的效果,探讨有效经济的联合免疫阻断方法。方法:将HBsAg阳性母亲的新生儿随机分为100 IU HBIG免疫组和200 IU HBIG免疫组,分别在出生12 h内注射100 IU或200 IU HBIG,同时新生儿都按0、1、6的程序接种10μg乙肝疫苗,在婴儿7个月龄时观察HBV母婴阻断效果。结果:100 IU、200 IU组母婴阻断成功率分别为98.3%、98.0%,两组的阻断效果无明显差异,结合母亲HBV感染状态分析,两组的阻断效果亦无明显差异。结论:在新生儿HBV母婴阻断中,100 IU HBIG或200 IU HBIG联合10μg乙肝疫苗的主被动联合免疫可获相似的阻断效果。展开更多
文摘The objective of this research paper is to study numerical relationships between a block of a finite group and a defect group of such block. We define a new notion which is called a strongly k(D)- block and give a necessary and sufficient condition of a block with a cyclic defect group to be a k(D) -block in term of its inertial index. We believe that the notion and the results in this work will contribute to the developments of the theory of blocks of finite groups.
文摘Nanostructure fabrication from block copolymers in my group normally involves polymer design, synthesis, self-assembly, selective domain crosslinking, and sometimes selective domain removal. Preparation of thin films withnanochannels was used to illustrate the strategy we took. In this particular case, a linear triblock copolymer polyisoprenc-block-poly(2-cinnamoylethyl methacrylate)-block-poly(t-butyl acrylate), PI-b-PCEMA-b-PtBA, was used. Films, 25 to50 μm thick, were prepared from casting on glass slides a toluene solution of PI-b-PCEMA-b-PtBA and PtBA homopolymer,hPtBA, where hPtBA is shorter than the PtBA block. At the hPtBA mass faction of 20% relative to the triblock or the totalPtBA (hPtBA and PtBA block) volume fraction of 0.44, hPtBA and PtBA formed a seemingly continuous phase in the matrixof PCEMA and Pl. Such a block segregation pattern was locked in by photocrosslinking the PCEMA domain. Nanochannelswere formed by extracting out hPtBA with solvent. Alternatively. larger channels were obtained from extracting out hPtBAand hydrolyzing the t-butyl groups of the PtBA block. Such membranes were not liquid permeable but had gas permeabilityconstants ～6 orders of magnitude higher than that of low-density polyethylene films.
文摘目的 :评价乙肝疫苗联合不同剂量乙型肝炎免疫球蛋白(hepatitis B immunoglobulin,HBIG)对HBV母婴阻断的效果,探讨有效经济的联合免疫阻断方法。方法:将HBsAg阳性母亲的新生儿随机分为100 IU HBIG免疫组和200 IU HBIG免疫组,分别在出生12 h内注射100 IU或200 IU HBIG,同时新生儿都按0、1、6的程序接种10μg乙肝疫苗,在婴儿7个月龄时观察HBV母婴阻断效果。结果:100 IU、200 IU组母婴阻断成功率分别为98.3%、98.0%,两组的阻断效果无明显差异,结合母亲HBV感染状态分析,两组的阻断效果亦无明显差异。结论:在新生儿HBV母婴阻断中,100 IU HBIG或200 IU HBIG联合10μg乙肝疫苗的主被动联合免疫可获相似的阻断效果。
