检索结果-南通市图书馆

Two-dimensional gel electrophoresis-based analysis provides global insights into the cotton ovule and fiber proteomes

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2016年第2期59卷 154-163页

作者： Xiang Jin Limin Wang Liping He weiqiang feng Xuchu Wang Institute of Tropical Biosciences and Biotechnology Chinese Academy of Tropical Agricultural Sciences The State Key Laboratory of Protein and Plant Gene Research College of Life Sciences Peking University College of Horticulture and Landscape Hainan University

Proteomic analysis of upland cotton was performed to profile the global detectable proteomes of ovules and fibers using two-dimensional electrophoresis(2DE).A total of 1,203 independent protein spots were collected from representative 2DE gels,which were digested with trypsin and identified by matrix-assisted laser desorption and ionization-time-offlight/time-of-flight(MALDI-TOF/TOF)mass *** mass spectrometry or tandem mass spectrometry(MS or MS/MS)data were then searched against a local database constructed from Gossypium hirsutum genome sequences,resulting in successful identification of 975 protein spots(411 for ovules and 564 for fibers).Functional annotation analysis of the 975identified proteins revealed that ovule-specific proteins were mainly enriched in functions related to fatty acid elongation,sulfur amino acid metabolism and post-replication repair,while fiber-specific proteins were enriched in functions related to root hair elongation,galactose metabolism and D-xylose metabolic *** annotation analysis of the most abundant protein spots showed that 28.96%of the total proteins in the ovule were mainly located in the Golgi apparatus,endoplasmic reticulum,mitochondrion and ribosome,whereas in fibers,27.02%of the total proteins were located in the cytoskeleton,nuclear envelope and cell *** real-time polymerase chain reaction(q RT-PCR)analyses of the ovule-specific protein spots P61,P93 and P198 and fiber-specific protein spots 230,477 and 511 were performed to validate the proteomics ***-protein interaction network analyses revealed very different network cluster patterns between ovules and *** work provides the largest protein identification dataset of 2DE-detectable proteins in cotton ovules and fibers and indicates potentially important roles of tissue-specific proteins,thus providing insights into the cotton ovule and fiber proteomes on a global scale.

关键词： cotton 2DE MALDI-TOF/TOF GO enrichment protein-protein interaction networks

Global instability index as a crystallographic stability descriptor of halide and chalcogenide perovskites

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第7期31卷 1-8,I0001页

作者： weiqiang feng Ruoting Zhao Xiaoyu Wang Bangyu Xing Yilin Zhang Xin He Lijun Zhang State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012.JilinChina State Key Laboratory of Superhard Materials Key Laboratory of Automobile Materials of MOE and College of Materials Science and EngineeringJilin UniversityChangchun 130012.jilin.China

Crystallographic stability is an important factor that affects the stability of *** stability dictates the commercial applications of lead-based organometal halide *** tolerance factor(t)and octahedral factor(μ)form the state-of-the-art criteria used to evaluate the perovskite crystallographic *** studied the crystallographic stabilities of halide and chalcogenide perovskites by exploring an effective alternative descriptor,the global instability index(GII)that was used as an indicator of the stability of perovskite *** particularly focused on determining crystallographic reliability by calculating *** analyzed the bond valence models of the 243 halide and chalcogenide perovskites that occupied the lowest-energy cubic-phase structures determined by conducting the first-principles-based total energy minimization *** decomposition energy(ΔHD)reflects the thermodynamic stability of the system and is considered as the benchmark that helps assess the effectiveness of GII in evaluating the crystallographic stability of the systems under *** results indicated that the accuracy of predicting thermodynamic stability was significantly higher when GII(73.6%)was analyzed compared to the cases when t(55%)andμ(39.1%)were analyzed to determine the *** results obtained from the machine learning-based data mining method further indicate that GII is an important descriptor of the stability of the perovskite family.

关键词： Organometal halide perovskites Stability Optoelectronics Global instability index First-principles calculations

Lanthanide-regulated oxygen evolution activity of face-sharing Ir〇6 dimers in 6H-perovskite electrocatalysts

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 2020年第11期41卷 1692-1697页

作者： weiqiang feng Hui Chen Qi Zhang Ruiqin Gao Xiaoxin Zou State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012JilinChina

The development of efficient oxygen evolution electrocatalysts with reduced noble metal uses is a critical challenge for the deployment of various advanced energy conversion ***,a series of lanthanide-contained 6H-perovskites with a formula of Ba3LnIr2〇9(Ln=lanthanides)are investigated as oxygen evolution electrocatalysts,whose active subunits(i.e.,face-sharing Ir〇6 dimers)can be regulated by the lanthanides in terms of catalytic *** using density functional theory(DFT)calculations,we establish the theoretical trend in activity for Ba3LnIr2〇96H-perovskites,the activity of which is correlated with the difference of adsorption free energy(△G〇-△Goh)between O*and OH*reaction *** further establish a volcano curve between△Go—△Goh and the calculated 0 p-band center Among the Ba3LnIr2〇96H-perovskites,Ba3Lalr2〇9 locates at the peak of volcano curve,and correspondingly is the most active electrocatalyst due to the optimal 0 p-band property.

关键词： Lanthanide Perovskite Oxygen evolution reaction O p-band center Electrocatalyst

The Hilbert expansion of the Boltzmann equation in the incompressible Euler level in a channel

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2024年

作者： Feimin Huang weiqiang Wang Yong Wang feng Xiao Academy of Mathematics and Systems Science Chinese Academy of Sciences School of Mathematical Sciences University of Chinese Academy of Sciences Key Laboratory of Computing and Stochastic Mathematics (Ministry of Education) School of Mathematics and Statistics Hunan Normal University

The study of the hydrodynamic limit of the Boltzmann equation with physical boundary is a challenging problem due to the appearance of the viscous and Knudsen boundary layers. In this paper, the hydrodynamic limit from the Boltzmann equation with the specular reflection boundary condition to the incompressible Euler equations in a channel is investigated. Based on the multi-scaled Hilbert expansion,the equations with boundary conditions and compatibility conditions for interior solutions, and viscous, and Knudsen boundary layers are derived under different scaling, respectively. Then, some uniform estimates for the interior solutions, and viscous, and Knudsen boundary layers are established. With the help of the L2-L∞framework and the uniform estimates obtained above, the solutions to the Boltzmann equation are constructed by the truncated Hilbert expansion with multiscales, and hence the hydrodynamic limit in the incompressible Euler level is justified.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

舰艇战斗损管决策建模及信息化系统研究

系统工程与电子技术 2018年第3期40卷 583-589页

作者：侯岳王康勃冯伟强安中昌海军工程大学动力工程学院中国人民解放军92537部队

舰艇损管是保障舰艇生命力的最后一道防线。战斗损管,是区别于平时损管的更为复杂和严酷的战术和技术指挥行动。考虑到战斗破损灾害特征的复杂性,战斗损管决策模型的构建也将更为复杂,实现决策支持系统与其他接口的信息融合更为困难。... 详细信息

舰艇损管是保障舰艇生命力的最后一道防线。战斗损管,是区别于平时损管的更为复杂和严酷的战术和技术指挥行动。考虑到战斗破损灾害特征的复杂性,战斗损管决策模型的构建也将更为复杂,实现决策支持系统与其他接口的信息融合更为困难。为解决以上问题,首先针对战斗损管决策的两个关键模型进行了建模,完成了战斗损管决策的方法研究。然后在建立数据图层的基础上,研究开发了舰载战斗损管决策信息化系统,并在损管指挥训练系统中进行了实际应用和测试。应用结果表明,模型和系统显著提高了决策的速度和精度,是辅助开展战斗损管指挥的重要手段。

关键词：战斗损管(damage control,DC) 决策建模信息化

在线全文

学校读者我要写书评

暂无评论

现代信息经济学视角下信息资源产业化探究

电子测试 2013年第12X期24卷 99-100页

作者：封卫强北京交通大学中国产业安全研究中心北京100044

信息产业化是指在信息化过程中,将信息产品制造、信息开发及信息服务等发展成为一个相对独立的行业——信息产业,提高信息产业增加值在国民生产总值中的比重并达到信息资源共享的过程。目前我国的信息资源产业发展落后于其他发达国家和... 详细信息

信息产业化是指在信息化过程中,将信息产品制造、信息开发及信息服务等发展成为一个相对独立的行业——信息产业,提高信息产业增加值在国民生产总值中的比重并达到信息资源共享的过程。目前我国的信息资源产业发展落后于其他发达国家和地区。本文对相关信息资源产业内涵、组成与分类的研究成果进行了系统地梳理了,在此基础上分析了信息资源产业的内涵、本质特征及与其他产业的关系,提出了信息资源产业在国民经济中进行单独统计的分类框架。

关键词：信息资源现代信息经济学产业化

在线全文

学校读者我要写书评

暂无评论

南京市基层动物防疫工作运行与管理模式初探

中国动物检疫 2006年第4期23卷 15-17页

作者：冯伟强张振岚江苏省南京市畜牧兽医站 210001

近几年来,高致病性禽流感等重大动物疫病暴发、流行,严重威胁人类健康和畜牧业稳定发展,造成了巨大经济损失.

关键词：动物防疫工作管理模式基层运行南京市重大动物疫病高致病性禽流感防控技术兽医管理体制基础免疫

在线全文

学校读者我要写书评

暂无评论

双极性脉冲臭氧发生的实验研究

高电压技术 2018年第9期44卷 3083-3088页

作者：冯卫强刘振刘百良黄逸凡闫克平浙江大学环境与资源学院杭州310028 浙江大学化学工程与生物工程学院杭州310028

为了更有效地产生臭氧,采用双极性脉冲电源为臭氧发生器供电,并与传统的交流电源做比较,实验所用气源为干燥空气,臭氧发生器放电管采用工业上常用的搪瓷圆柱形放电管,分别对放电参数、臭氧体积分数和能效、红外光谱以及产物中二氧化氮... 详细信息

为了更有效地产生臭氧,采用双极性脉冲电源为臭氧发生器供电,并与传统的交流电源做比较,实验所用气源为干燥空气,臭氧发生器放电管采用工业上常用的搪瓷圆柱形放电管,分别对放电参数、臭氧体积分数和能效、红外光谱以及产物中二氧化氮体积分数这些方面做出比较分析。实验结果表明,两种电源下的放电功率随着电压的增大近似线性增长,交流电源的增长速度更快;采用双极性脉冲电源时,介质电容和最小放电电压更小;在同样的能量密度下,采用双极性脉冲电源得到的臭氧体积分数和能量效率均明显高于交流电源;红外光谱分析显示两种电源下得到的尾气成分一致,均检测不到NO;在得到同样的臭氧浓度时,采用双极性脉冲电源产生的二氧化氮量更低。该研究可以为臭氧发生系统的电源选择和优化提供参考。

关键词：双极性脉冲电源交流电源臭氧发生臭氧浓度能量效率

Improving the response of 2D COFs to the surface doping strategies through rational design of their chemical structure

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2024年第10期67卷 3272-3281页

作者： Xin feng Xuefeng Liang Xinxia Li Zhou Fang weiqiang Wei Lisheng Zhang Yan He Huifang Li College of Electromechanical Engineering Shandong Engineering Laboratory for Preparation and Application of High-Performance Carbon-MaterialsQingdao University of Science&TechnologyQingdao 266061China

The chemical structure of covalent organic frameworks(COFs)plays a key role in their response to the surface doping strategy used for tuning their electronic character,but it is still not fully *** explore a rational design proposal for their chemical structure,the electronic properties of three n-doped typical COFs,including boroncontaining(COF-1),triazine-based(CTF),and C–C bondlinked(GCOF)COFs,were investigated theoretically in this *** expected,the chemical doping effects are different for these *** dispersion of the frontier bands,the nuclear-independent chemical shift(NICS)aromaticity index results,distribution of the electron localization function(ELF),and Hirshfeld charge population plots show that part of the transferred electron from dopants will be offset by the intralayer charge transfer of ***,chemical doping effects are more significant if the electron distribution in the COFs is more *** means the response of COFs to the surface doping strategy should be dominated by the conjugation degree of their chemical *** results prove that the intrinsic conjugation degree of COFs plays a key role in such doping functionalization strategies,which are expected to provide more useful information for the initial structure design of COF materials and facilitate their practical applications as active electronic transport materials in nanoscale devices.

关键词： COF monolayers adsorption doping strategy energy level alignment conjugation degree density functional theory