检索结果-南通市图书馆

Crystal structures of the two membrane-proximal Ig-like domains(D3D4)of LILRB1/B2:alternative models for their involvement in peptide-HLA binding

引用

Protein & Cell 2013年第10期4卷 761-770页

作者： Gol Nam Yi Shi myongchol ryu Qihui Wang Hao Song Jun Liu Jinghua Yan Jianxun Qi George F Gao CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Institute of Microbiology State Academy of SciencesPyongyangDemocratic People’s Republic of Korea Research Network of Immunity and Health(RNIH) Beijing Institutes of Life ScienceChinese Academy of SciencesBeijing 100101China

Leukocyte immunoglobulin-like receptors(LILRs),also called CD85s,ILTs,or LIRs,are important mediators of immune activation and tolerance that contain tandem immunoglobulin(Ig)-like *** are 11(in addition to two pseudogenes)LILRs in total,two with two Ig-like domains(D1D2)and the remaining nine with four Ig-like domains(D1D2D3D4).Thus far,the structural features of the D1D2 domains of LILR proteins are well defi ned,but no structures for the D3D4 domains have been *** is a very important fi eld to be studied as it relates to the unknown functions of the D3D4 domains,as well as their relative orientation to the D1D2 domains on the cell ***,we report the crystal structures of the D3D4 domains of both LILRB1 and *** two Ig-like domains of both LILRB1-D3D4 and LILRB2-D3D4 are arranged at an acute angle(~60°)to form a bent struc-ture,resembling the structures of natural killer inhibitory *** on these two D3D4 domain structures and previously reported D1D2/HLA I complex structures,two alternative models of full-length(four Ig-like domains)LILR molecules bound to HLA I are proposed.

关键词： LILRs D3D4 HLA binding crystal structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A semi-analytical method for forced vibration analysis of cracked laminated composite beam with general boundary condition

引用

Journal of Ocean Engineering and Science 2021年第1期6卷 40-53页

作者： Sok Kim Kwanghun Kim myongchol Ri Yongsong Paek Choljun Kim Department of Information Engineering Chongjin Mine&Metal UniversityChongjin 999091Democratic People’s Republic of Korea Department of Engineering Machine Pyongyang University of Mechanical EngineeringPyongyang 999093Democratic People’s Republic of Korea Institute of Science Pyongyang University of Mechanical EngineeringPyongyang 999093Democratic People’s Republic of Korea Department of Resources Development Mechanical Engineering Pyongyang University of Mechanical EngineeringPyongyang 999093Democratic People’s Republic of Korea

In this paper,a semi-analytical method for the forced vibration analysis of cracked laminated composite beam(CLCB)is *** computational model is formulated by Timoshenko beam theory and its dynamic solution is solved using the Jacobi-Ritz *** boundary conditions(BCs)at both ends of the CLCB are generalized by the application of artificial elastic springs,the CLCB is separated into two elements along the crack,the flexibility coefficient of fracture theory is used to model the essential continuous condition of the connective *** the allowable displacement functions used to analyze dynamic characteristics of CLCB are expressed by classical Jacobi orthogonal polynomials in a more general *** accuracy of the proposed method is verified through the compare with results of the finite element method(software ABAQUS is used in this paper).On this basis,the parametric study for dynamic analysis characteristics of CLCB is performed to provide reference datum for engineers.

关键词： Semi-analytical method Cracked laminated composite beam(CLCB) Dynamic analysis General boundary condition Numerical analysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

铁磁材料低温磁性能测量研究

引用

稀有金属材料与工程 2019年第3期48卷 898-904页

作者：汪天龙邱清泉靖立伟 myongchol.Ri 丁大伟中国科学院应用超导重点实验室北京100190 中国科学院电工研究所北京100190 中国科学院大学北京100049 中国科学院物理研究所北京100190

采用模拟冲击法研究了铁磁材料在300和77 K环境下的磁性能。以电工领域常用的铁磁材料DT4、1J22、2Cr13和非晶FeSiB为研究对象。结果表明,在液氮环境下,DT4、1J22、2Cr13和非晶FeSiB的饱和磁感应强度均略有增加,其中非晶FeSiB的饱和磁... 详细信息

采用模拟冲击法研究了铁磁材料在300和77 K环境下的磁性能。以电工领域常用的铁磁材料DT4、1J22、2Cr13和非晶FeSiB为研究对象。结果表明,在液氮环境下,DT4、1J22、2Cr13和非晶FeSiB的饱和磁感应强度均略有增加,其中非晶FeSiB的饱和磁感应强度增幅最大为5.3%; DT4、非晶FeSiB和2Cr13的矫顽力增幅较大,DT4的矫顽力增幅为106%,而1J22的矫顽力减小了1.7%;频率为50 Hz时,在液氮环境下DT4的损耗相比室温急剧增加,增幅达263.2%,非晶FeSiB和2Cr13的损耗相比室温略有增加,而1J22的损耗相比室温变化不大。最后,以超导线圈激磁的强磁场磁控溅射阴极的磁场计算为例,在铁芯结构相同的情况下,采用1J22作铁芯的磁控阴极靶面磁场水平分量的最大值为0.2344T,相比2Cr13作铁芯磁场水平分量最大值增加了14.8%。有关铁磁材料的低温磁性能研究可以为超导电磁装置的铁芯磁路设计提供依据。

关键词：软磁材料磁化曲线损耗曲线磁控溅射阴极

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mutation of the Light-induced Yellow Leaf 1 Gene, Which Encodes a Geranylgeranyl Reductase, Affects Chlorophyll Biosynthesis and Light Sensitivity in Rice

Mutation of the Light-induced Yellow Leaf 1 Gene, Which Enco...

引用

江苏省遗传学会2013年学术研讨会

作者： Yuan Yuan Yong Zhou Zhiyun Gong Zefeng Yang Jinyan Zhu Man Wang Fuhai Yuan Shujun Wu Zhiqin Wang Chuandeng Yi Tinghua Xu myongchol Ryom Minghong Gu Guohua Liang

Chlorophylls（Chls） are crucial for capturing light energy for photosynthesis. Although several genes responsible for Chl biosynthesis were characterized in rice（Oryza sativa）, the genetic properties of the hydrogenating enzyme involved in the final step of Chl synthesis remain unknown. In this study, we characterized a rice light-induced yellow leaf 1-1（lyl1-1） mutant that is hypersensitive to high-light and defective in the Chl synthesis. Light-shading experiment suggested that the yellowing of lyl1-1 is light-induced. Map-based cloning of LYL1 revealed that it encodes a geranylgeranyl reductase. The mutation of LYL1 led to the majority of Chl molecules are conjugated with an unsaturated geranylgeraniol side chain. LYL1 is the firstly defined gene involved in the reduction step from Chl-geranylgeranylated（ChlGG） and geranylgeranyl pyrophosphate（GGPP） to Chl-phytol（ChlPhy） and phytyl pyrophosphate（PPP） in rice. LYL1 can be induced by light and suppressed by darkness which is consistent with its potential biological functions. Additionally, the lyl1-1 mutant suffered from severe photooxidative damage and displayed a drastic reduction in the levels of α-tocopherol and photosynthetic proteins. We concluded that LYL1 also plays an important role in response to high-light in rice.

关键词： rice Chl biosynthesis light-induced yellow leaf geranylgeranyl reductase α-tocopherol

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

仿生非光滑水田犁壁的设计及田间应用试验

引用

农机化研究 2015年第12期 160-165页

作者：金俊李建桥张广权李英日朴明哲黄晗吉林大学金日成综合大学桂应相农业大学

水田犁田间作业时土壤对犁壁的严重粘附,将导致犁耕阻力增加、油耗增大、耕作质量和生产效率降低。经过大量的试验研究,已发现典型土壤动物蜣螂体表的减粘降阻和脱附效应,并据此开发了仿生犁壁。在前期研究基础上,考察仿生非光滑水田犁... 详细信息

水田犁田间作业时土壤对犁壁的严重粘附,将导致犁耕阻力增加、油耗增大、耕作质量和生产效率降低。经过大量的试验研究,已发现典型土壤动物蜣螂体表的减粘降阻和脱附效应,并据此开发了仿生犁壁。在前期研究基础上,考察仿生非光滑水田犁壁面上几何非光滑结构单元的尺寸和分布对犁耕阻力的影响,进行了设计参数优化,研制出具有减粘降阻性能的仿生非光滑水田犁壁。田间对比测试表明:仿生非光滑水田犁壁与普通光滑水田犁壁相比,降低犁耕阻力15.9%~18.0%,减少油耗11.9%,提高生产率20.5%。该犁壁耕翻的碎垡率高,耕作质量良好,有较好的实际应用前景。

关键词：水田犁犁壁仿生非光滑犁耕阻力

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：