Formation of SEI layer on LiCoO_2 electrode and the Li ion diffusion kinetics

[中文文摘]用SEM和EIS法研究了LiCoO2材料表面SEI膜的形貌特征及锂离子在其中的扩散动力学行为。SEM结果表明:化成后的LiCoO2材料表面存在SEI膜,其形貌和厚度与溶剂密切相关,在PC溶剂中形成的SEI膜要比DMC溶剂中形成的薄。EIS结果显示:锂离子在SEI膜中的扩散过渡时间比在LiCoO2材料中小1个数量级,但是扩散系数却小3~4个数量级。[英文文摘]The morphological character of the SEI layers formed on the surface of LiCoO2 and the Li ion diffusion kinetics in it were studied by the methods of SEM and EIS.The result of SEM indicated that the SEI layer was found on the surface of LiCoO2 after formation,its morphology and thickness were closely related with the solvent,the SEI layer formed in PC solvent was thinner than that formed in DMC solvent.The result of EIS showed that the Li ion diffusion transition time in SEI film was shorter for 1 order of magnitude than in LiCoO2 material , but its transfer diffusion coefficient was smaller for 3～4 orders of magnitude。973项目(2002CB211807); 福建省化学电源科技创新平台(2006H0090)

MBE InGaAs/GaAs外延层晶胞弛豫直接测量的X射线双晶衍射方法

采用了以解理面为衍射基面,直接测量水平弛豫的方法测量了In_xGa_(1-x)As(衬底为GaAs,X-0.1)外延层的应变及其弛豫状态。在以解理面为衍射基面的衍射曲线上清楚地观测到了衬底峰与外延峰的分裂。表明当InGaAs层厚度较厚(-2μm)时，InGaAs外延层与衬底GaAs已处于非共格生长状态，同时发现大失配的InGaAs晶胞并没有完全弛豫恢复到自由状态。其平行于表面法线的晶格参数略大于垂直方向上的晶格参数(△α/α-10~(-3))。并且晶胞在弛豫过程中产生了切向应变。在考虑了切向应变的基础上准确地确定出了InGaAs层的In组分x

束-气条件下He（2↑3S）＋CH↓2Cl↓2碰撞传能反应的动力学研究

本文在束－气条件下研究了亚稳态原子Ｈｅ（２＾３Ｓ）与ＣＨ２Ｃｌ２间的传能反应，测得了由该反应产生的ＣＨ（Ａ＾２△－Ｘ＾２П），ＣＨ（Ｂ＾２∑＾－Ｘ＾２П）ＣＨ（Ｃ＾２∑＾＋－Ｘ＾２П）和Ｈ原子（Ｂａｌｍｅｒ系）的化学发光光谱。通过对ＣＨ（Ａ，Ｂ）的光谱进行计算机模拟，推测出初手的ＣＨ（Ａ＾２△，ｖ＾１＝０－２）态振动分布为Ｎｏ：Ｎ１：Ｎ２＝１００：４０±５：１９±２，ＣＨ（Ａ＾２△，ｖ＾１＝０－

束-气条件下He（2↑3S）＋CH↓2Cl↓2碰撞传能反应的动力学研究

本文在束－气条件下研究了亚稳态原子Ｈｅ（２＾３Ｓ）与ＣＨ２Ｃｌ２间的传能反应，测得了由该反应产生的ＣＨ（Ａ＾２△－Ｘ＾２П），ＣＨ（Ｂ＾２∑＾－Ｘ＾２П）ＣＨ（Ｃ＾２∑＾＋－Ｘ＾２П）和Ｈ原子（Ｂａｌｍｅｒ系）的化学发光光谱。通过对ＣＨ（Ａ，Ｂ）的光谱进行计算机模拟，推测出初手的ＣＨ（Ａ＾２△，ｖ＾１＝０－２）态振动分布为Ｎｏ：Ｎ１：Ｎ２＝１００：４０±５：１９±２，ＣＨ（Ａ＾２△，ｖ＾１＝０－

Microsatellites in the growth-related genes of female andmale Tongue sole Cynoglossus semilaevis andtheir application in the population genetic analysis

利用在生长激素(gH)、生长激素释放激素(gHrH)和垂体腺苷酸环化酶激活多肽(PACAP)基因中发现的7个微卫星位点,分析了半滑舌鳎两个野生群体(渤海群体和黄海群体)和1个养殖群体间以及各群体内雌雄个体间的遗传多态性差异。结果表明,7个位点中有4个位点表现出多态性,在3个群体中的等位基因数的分布范围为2~37,平均为9.5;有效等位基因数分布范围为2~28.9,平均为8.4。各位点的平均观测杂合度、平均期望杂合度和平均多态信息含量分布范围分别为0.5145~0.7738、0.5690~0.8671和0.4829~0.8314。群体间的成对fST值及个体分配分析的结果表明,半滑舌鳎野生群体和养殖群体之间存在显著性遗传差异,而在两个野生群体之间差异不显著。此外,等位基因分布和双倍体基因型分布的差异性检测结果表明,这4个多态性位点在3个群体的雌、雄性别间均不存在显著性差异。Seven microsatellite loci were identified in the GH,GHRH and PACAP genes of Cynoglossus semilaevis,and were used as polymorphic markers to analyze the genetic diversity and genetic structure of two wild populations(BS and YS) and a cultured population(HS).The results revealed that no genetic polymorphism was detected in three loci out of seven.The numbers of alleles in the other four loci ranged from 2 to 37,with an average of 9.5,and the numbers of effective alleles ranged from 2 to 28.9,with an average of 8.4.The observed and expected heterozygosities ranged from 0.514 5 to 0.773 8 and from 0.569 0 to 0.867 1,respectively.The average polymorphism information content per locus ranged from 0.482 9 to 0.831 4.The results of pairwise FST and individual distribution analysis demonstrated that there was no significant difference between the wild populations,while significant differences were observed between the wild and the cultured populations.Moreover,based on the distribution of alleles and diploid genotypes,no significant difference was observed between female and male in any of the three populations.国家自然科学基金(30871913);山东省泰山学者工程专项(2009.03-2014.02);山东省自主创新成果转化重大专项(2009ZHZX1A1201)共同资

中国外来归化植物的编目现状及有关问题

在简要讨论外来植物相关定义的基础上,对中国外来归化植物的调查和编目现状进行了概述;并对近年发表的两篇文章中外来归化植物数据进行了订正

Inhibition of N,N'-o-phenylen-bis(3-methoxysalicylidenimine) on Copper in Halide Solutions

应用恒电位稳态极化和交流阻抗技术研究了希夫碱—邻香兰素邻苯二胺 (V_oPh_V)在中性NaCl或NaBr溶液中对金属铜阳极溶解和腐蚀的缓蚀作用 .通过比较铜在空白溶液与含有V_o_Ph_V溶液中的电化学行为解释了V_o_Ph_V的缓蚀机制 .此外还研究了V_o_Ph_V自组装膜在Na Cl溶液中对铜腐蚀的缓蚀效应 .Inhibition of N,N'_o_phenylen_bis(3_methoxysalicylidenimine)(V_o_Ph_V)on corrosion and anodic disslution of copper in neutral NaCl and NaBr solutions was investigated in terms of potentiostatic steady_state polarization and A.C. impedance techniques.The inhibition mechanism of V_o_Ph_V to copper corrosion was interpreted in detail by comparing the electrochemical behaviors of copper in halide solutions with or without V_o_Ph_V. Besides,the inhibition effect of self_assembled V_o_Ph_V film on copper corrosion in NaCl was also studied.作者联系地址：山东大学化学学院!山东济南25100,山东大学化学学院!山东济南25100,山东大学化学学院!山东济南25100,山东大学化学学院!山东济南25100,山东大学化学学院!山东济南25100Author's Address: College of Chemistry,Shandong University,Jinan 250100 Chin

一个奇异核反应总截面的探测系统及其应用

评述了现有的奇异核反应总截面测量方法，介绍了一套简单可行的测量中能区奇异核反应总截面的探测装置，并对实验的能量刻度、粒子鉴别以及实验结果进行了阐述和讨论．The present status of experimental studies of the total reaction cross sections of exotic nuclei are reviewed. A detector system used for measuring the total reaction cross section of radioactive ions is described. The energy calibration of detectors, particle identification and possible experimental results are discussed.国家杰出青年科学研究基

Influence of N/P ratio on the growth and competition of two red tide algae

研究了两种赤潮藻即假微型海链藻(Thalassiosira pseudonanaHasle et Heimdalh)和裸甲藻(Gymnodiniumsp.)在不同氮磷比培养条件下的生长特性和藻间竞争作用,探讨了氮磷含量及其比值对赤潮爆发的影响机理.结果表明,在N/P=16条件下,假微型海链藻的最大比增长率最高、相对生长常数最大、平均倍增时间最短,叶绿素a含量最高,说明该N/P值是假微型海链藻最佳生长营养盐条件.对裸甲藻而言,N/P=6是其最佳生长的营养盐条件.叶绿素a含量受N/P值的影响和藻细胞密度所受的影响趋势基本一致.不同N/P值对藻间竞争作用和群落演替的总体影响不明显,都呈现先硅藻后甲藻的群落演替规律.裸甲藻可能具有利用体内磷来维持生长的特点. 【英文摘要】 The growth and species competition of two red tide species Thalassiosira pseudonana and Gymnodinium sp.were studied under different N/P ratio,and the algal batch culture experiments was conducted.The physiological and biochemical indexes were measured periodically,including μ_(max),K,G(d)and Chla.The results showed that when the N/P ratio was 16∶1,the μ_(max),K and Chla of Thalassiosira pseudonana were all the highest,and G(d)was the shortest.This implied that the optimal N/P ratio of Thalassiosira pseudo...福建省自然科学基金项目(D96012);; 国家海洋局海洋科技项目(A01305);; 国家重点基础研究计划项目(2001CB409701)资助课