分子生物学是从分子水平揭示生命的本质规律,近十几年来,取得了辉煌的成果,得到了大量的生物大分子信息数据。随着研究的深入,对这些数据的管理和分析显得格外重要,传统的手工处理已无法胜任,幸好计算机的发展和分子生物学的发展几乎同...分子生物学是从分子水平揭示生命的本质规律,近十几年来,取得了辉煌的成果,得到了大量的生物大分子信息数据。随着研究的深入,对这些数据的管理和分析显得格外重要,传统的手工处理已无法胜任,幸好计算机的发展和分子生物学的发展几乎同步进行。人们利用计算机具有信息量大、运算准确、迅速的特点在逐步解决大量的数据分析处理问题,建立了核酸、蛋白序列数据库,开发了许多优秀的应用软件,并取得了一些重要的结论,一些专家系统也在策划之中,本文就计算机在分子生物学中的应用情况作综述和展望。核酸序列数据库包括基因组 ONA 序列、CDNA 序列、RNA 序列,1980年由美国国立基础医学研究院和 U.S.Department of Energy 发起、加州大学 LANL 实验室负责收集整理、Inteui Genetics 负责发行建立起核酸序列数据库(GENBANK)。展开更多
Li[NixCoyMn2]O2(0.6≤x≤0.8) cathode materials with a typical hexagonal α-NaFeO2 structure were prepared utilizing a co-precipitation method.It is found that the ratio of peak intensities of(003) to(104) observ...Li[NixCoyMn2]O2(0.6≤x≤0.8) cathode materials with a typical hexagonal α-NaFeO2 structure were prepared utilizing a co-precipitation method.It is found that the ratio of peak intensities of(003) to(104) observed from X-ray diffraction(XRD)increases with decreasing the Ni content or increasing the Co content.The scanning electron microscopy(SEM) images reveal that the small primary particles are agglomerated to form the secondary ones.As the Mn content increases,the primary and secondary particles become larger and the resulted particle size for the Li[Ni(0.6)Co(0.2)Mn(0.2)]O2 is uniformly distributed in the range of100-300 nm.Although the initial discharge capacity of the Li/Li[NixCoyMn2]O2 cells reduces with decreasing the Ni content,the cyclic performance and rate capability are improved with higher Mn or Co content.The Li[Ni(0.6)Co(0.2)Mn(0.2)]O2 can deliver excellent cyclability with a capacity retention of 97.1%after 50 cycles.展开更多
文摘分子生物学是从分子水平揭示生命的本质规律,近十几年来,取得了辉煌的成果,得到了大量的生物大分子信息数据。随着研究的深入,对这些数据的管理和分析显得格外重要,传统的手工处理已无法胜任,幸好计算机的发展和分子生物学的发展几乎同步进行。人们利用计算机具有信息量大、运算准确、迅速的特点在逐步解决大量的数据分析处理问题,建立了核酸、蛋白序列数据库,开发了许多优秀的应用软件,并取得了一些重要的结论,一些专家系统也在策划之中,本文就计算机在分子生物学中的应用情况作综述和展望。核酸序列数据库包括基因组 ONA 序列、CDNA 序列、RNA 序列,1980年由美国国立基础医学研究院和 U.S.Department of Energy 发起、加州大学 LANL 实验室负责收集整理、Inteui Genetics 负责发行建立起核酸序列数据库(GENBANK)。
基金Project(21473258)supported by the National Natural Science Foundation of ChinaProject(13JJ1004)supported by the Distinguished Young Scientists of Hunan Province,ChinaProject(NCET-11-0513)supported by the New Century Excellent Talents in University,China
文摘Li[NixCoyMn2]O2(0.6≤x≤0.8) cathode materials with a typical hexagonal α-NaFeO2 structure were prepared utilizing a co-precipitation method.It is found that the ratio of peak intensities of(003) to(104) observed from X-ray diffraction(XRD)increases with decreasing the Ni content or increasing the Co content.The scanning electron microscopy(SEM) images reveal that the small primary particles are agglomerated to form the secondary ones.As the Mn content increases,the primary and secondary particles become larger and the resulted particle size for the Li[Ni(0.6)Co(0.2)Mn(0.2)]O2 is uniformly distributed in the range of100-300 nm.Although the initial discharge capacity of the Li/Li[NixCoyMn2]O2 cells reduces with decreasing the Ni content,the cyclic performance and rate capability are improved with higher Mn or Co content.The Li[Ni(0.6)Co(0.2)Mn(0.2)]O2 can deliver excellent cyclability with a capacity retention of 97.1%after 50 cycles.