检索结果-南通市图书馆

Phase transition in the subducted oceanic lithosphere and generation of the subduction zone magma

Chinese Science Bulletin 2008年第23期53卷 3603-3614页

作者： WEI chunjing zhang YingHui Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of Education of China School of Earth and Space Sciences Pe-king University Beijing 100871 China

Two metamorphic processes, i.e. subsolidus dehydration and partial melting occurring in MORB, metasediments and peridotite of subducted oceanic lithosphere are discussed on the basis of available experimental work and phase equilibrium modeling. Phase diagrams of hydrous MORB show that in most cold subduction P-T (pressure-temperature) regimes a large portion of water in the basic layer has released below the onset of blueschist facies (< 20 km), and at a depth (60―70 km) of transition from lawsonite blueschist to lawsonite eclogite facies through glaucophane dehydration; only a smaller portion of water will escape from the slab through dehydration of lawsonite and chloritoid in the depth range suitable for arc magma formation; and a very small portion of water stored in lawsonite and phengite will fade into the deeper mantle. The role of amphibole for arc magma formation is still arguable. In cold subduction P-T regimes, the dehydration of chlorite and talc in Al-poor metasediments, and chloritoid and carpholite in Al-rich metapelites at a depth around 80―100 km will make some con- tributions to the formation of arc magma. Comparatively, dehydration of serpentine in hydrated peridotite occurs at depths of 120―180 km, playing an important role in the arc magmatism. Subduction of oceanic crust along warm P-T regimes will cross the solidi at a depth over 80 km, resulting in partial melting under fluid-saturated and fluid-absent conditions in the metasediments involving biotite and phengite, and in the basic rocks involving epidote and amphibole. The melt compositions of the basic crust are adakitic at pressures < 3.0 GPa, but become peraluminous granitic at higher pressures.

关键词：脱水作用部分熔融海洋岩石圈俯冲带

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

One-step wet-spinning assembly of twisting-structured graphene/carbon nanotube fiber supercapacitor

引用

Journal of Energy Chemistry 2020年第12期29卷 434-441页

作者： Zhengpeng Yang Yuanheng Jia Yutao Niu Yongyi zhang chunjing zhang Ping Li Meng Zhu Qingwen Li Henan Key Laboratory of Materials on Deep-Earth Engineering School of Materials Science and EngineeringHenan Polytechnic UniversityJiaozuo 454003HenanChina Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123JiangsuChina School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026AnhuiChina Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Suzhou Institute of Nano-Tech and Nano-BionicsNanchangChinese Academy of SciencesNanchang 330200JiangxiChina

Graphene fiber-based supercapacitors hold great promise as flexible energy-storage devices. However, simultaneously achieving high ion-transport ability in electrode and electrolyte layer, which is crucial for realizing the high electrochemical performance, still remains challenging. Here, a facile and effective strategy to solve the problem was proposed by developing a twisting-structured graphene/carbon nanotube(CNT) fiber supercapacitor via one-step wet-spinning process with customized multi-channel *** remarkable structure features of the resulting fiber supercapacitor with wrinkled and thin electrolyte layer, and well-developed porosity of fiber electrode favored the rapid infiltration and transport of electrolyte ions inside the electrode, as well as between electrode and electrolyte, thus boosting high specific capacitance of 187.6 mF cm^(-2) and energy density of 30.2 μWh cm^(-2), and featuring long cycling life(93%capacitance retention after 10,000 cycles) and excellent flexibility. Moreover, the specific capacitance and energy density could be further improved to 267.2 m F cm^(-2) and 66.8 μWh cm^(-2), respectively, when Mn O2 was incorporated into the fiber.

关键词： One-step wet-spinning Graphene fiber-based supercapacitor Twisting-structured fiber Ion transport

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

Isolation and characterization of glacier VMY22, a novel lytic cold-active bacteriophage of Bacillus cereus

引用

Virologica Sinica 2015年第1期30卷 52-58页

作者： Xiuling Ji chunjing zhang Yuan Fang Qi zhang Lianbing Lin Bing Tang Yunlin Wei Faculty of Life Science and Technology Kunming University of Science and Technology Faculty of Life Science Wuhan University

As a unique ecological system with low temperature and low nutrient levels, glaciers are considered a "living fossil" for the research of evolution. In this work, a lytic cold-active bacteriophage designated VMY22 against Bacillus cereus MYB41-22 was isolated from Mingyong Glacier in China, and its characteristics were studied. Electron microscopy revealed that VMY22 has an icosahedral head(59.2 nm in length, 31.9 nm in width) and a tail(43.2 nm in length). Bacteriophage VMY22 was classified as a Podoviridae with an approximate genome size of 18 to 20 kb. A one-step growth curve revealed that the latent and the burst periods were 70 and 70 min, respectively, with an average burst size of 78 bacteriophage particles per infected cell. The pH and thermal stability of bacteriophage VMY22 were also investigated. The maximum stability of the bacteriophage was observed to be at pH 8.0 and it was comparatively stable at p H 5.0–9.0. As VMY22 is a cold-active bacteriophage with low production temperature, its characterization and the relationship between MYB41-22 and Bacillus cereus bacteriophage deserve further study.

关键词： Bacillus cereus characterization cold-active phage lytic Podoviridae

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

Metropolitan digital library services evaluation: Measures and approaches

引用

Chinese Journal of Library and Information Science 2008年第1期1卷 38-51页

作者： LIU Wei LOU Xiangying zhang chunjing Shanghai Library The Library of Zhejiang Sci-tech University

This paper reviews the evaluation model and measurements according to metropolitan digital library activities. Through literature review and historical research, the authors argue that the evaluation of the digital library(DL) is still in a research stage and not yet of value to the real achievement of the DL in operation. Because of the variety of the understandings of the digital library and the complexity of the technical factors, we can put forward a set of reference models, measurements and approaches to combine with the various researches on the evaluation theory and practice in the digital library area. The authors primarily discuss and conclude with a digital library evaluation model and measurement index system according to the requirements of the world metropolitan libraries.

关键词： Digital library Digital resources Evaluation Evaluation model Evaluation index system

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

Authority control for the Web

引用

Journal of Library Science in China 2015年 233-234页

作者： Wei LIU chunjing zhang Cuijuan XIA 不详

'Organizing and accessing all kinds of knowledge of mankind'is the ultimate goal for bibliographic *** control as the major means for bibliographic control,evolved with library cataloguing at the very *** collection of authority records called authority file is one of MARC standard *** files play a vital role in the traditional library

关键词：

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

Implications of micro-compositions of garnet and biotite from high-grade meta-pelites

引用

Progress in Natural Science:Materials International 2006年第2期16卷 209-214页

作者： ZHOU Xiwen, WEI chunjing, and zhang Shangkun ( Institute of Geology, CAGS, Beijing 100037, China School of Earth and Space Sciences, Peking University, Beijing 100871, China China University of Geo-Sciences, Beijing 100083, China) Institute of Geology GAGS Beijing 100037 China School of Earth and Space Sciences Peking University Beijing 100871 China China University of Geo-Sciences Beijing 100083 China

Based on detailed studies on the compositional zoning of garnet and biotite in pelitic rocks from the Jingshan group of granulite facies in north Jiaodong, P-T pseudosections with isopleths of Fe/(Fe + Mg) in garnet and biotite were calculated in the KF-MASH system for two representative rocks of sillimanite-garnet-cordierite-biotite gneiss ( Vbi/ Vg>1 ) and sillimanite-garnet gneiss (Vbi/ Vg 1 can nearly preserve their peak compositions, and biotites in garnet-rich rocks with Vbi/Vg<0. 2 cannot preserve their peak compositions due to the influence of grain-boundary fluid.

关键词： high-grade meta-pelites THERMOCALC P-T pseudosection peak compositions of garnet and biotite.

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

The Impact Heme Oxygenase -1 on the Regulating Factors of Hepatoma Cells＇ Cell Cycle

引用

International Journal of Technology Management 2014年第9期 60-62页

作者： Han GAO Tao ZHOU Shuyan LI chunjing zhang Hongyue CHEN Biochemistry and Molecular Biology Teaching and Research Section Qiqihar Medical College Heilongjiang Province China

It aims to analyze the impact heme oxygenase -1 （heme oxygenase 1, HO-1） on regulating factors of human hepatoma cell HepG2＇s cell cycle, through constructing recombinant vector of pcDNA3.1 containing wild-type and mutant HO-1 gene （＋）-wtHO-1 and pcDNA3.1 （＋）-mHO-1G143H. By using the method of liposome-mediated, the recombinant vector was transfected hepatoma cell line HepG2. And the transfected one with empty vector was treated as a control group. By the selection of G418, stable expression of wild-type and mutant HO-1 in HepG2 liver cancer cell lines were established. Use the blot of semi-quantitative RT-PCR and Western to test transfected cell lines expressing levels of riO-1 mRNA and protein. As HO-1 expression in stably transfected cell lines altered, we use Western blot to test transfected cell lines P21, P27 protein expression levels. As result shows, we got 1 HO-over-expression of wild-type and mutant in HepG2 cells; wild- type and mutant＇s over expression of HO-1 can induce the expression of tumor suppressor genes p21 and *** got the conclusion that HO-l＇s over-expression of tumor suppressor genes p21 and p27 is unrelated to the expression of heme decomposition products. HO-1 may regulate the expression of p21 and p27 through other mechanisms.

关键词： Heme oxygenase-1 liver cells cell cycle regulation factors

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

Morphological diversity of cultured cold-active lytic bacteriophages isolated from the Napahai plateau wetland in China

引用

Virologica Sinica 2015年第6期30卷 457-459页

作者： Xiuling Ji chunjing zhang Anxiu Kuang Jiankai Li Yinshan Cui Kunhao Qin Lianbing Lin Benxu Cheng Qi zhang Yunlin Wei Faculty of Life Science and Technology Kunming University of Science and Technology Department of Biology University of Texas Rio Grande Valley Regional Academic Heath Center School of Medicine University of Texas Rio Grande Valley

Dear Editor,Viruses are the most abundant,diverse,and ubiquitous entities(approximately 1031)on *** play major roles in horizontal gene transfer,the regulation of bacterial community structures,as well as nutrient and energy cycles of marine ecosystems(Danovaro et al.,2008).In particular,lytic bacteriophages(phages)can infect and kill bacteria without harming human or

关键词： wetland plateau abundant diverse nutrient cultured diameters phage environments ubiquitous

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

Orogenic Model of the Eastern Dabie Mountains, Central China

引用

Global Geology 1999年第1期4卷 21-33页

作者： Wei chunjing, Shan Zhengang and zhang Lifei (Department of Geology, Peking University, Beijing 100871, China)

Based on the detailed geological mapping on the scale of 1/50,000 from the eastern Dabie Mountains, central China, an orogenic model of the Dabie belt can be elaborated. The mapping area crosses three litho tectonic belts in the Dabie Mountains including, from south to north, the southern Dabie collisional complex, northern Dabie metamorphic complex and northern Huaiyang metamorphic belts. The southern Dabie metamorphic complex is composed of eclogite blocks, HP metasediments and MP gneisses which have experienced quite different stages of metamorphism. The northern Dabie metamorphic complex and northern Huziyang metamorphic belt are mainly comprised by various supracrustal rocks and gneisses which have been only subjected to the MP metamorphism of amphibolite and epidote amphibolite facies. The central west part of the mapping area is mostly distributed by the Yanshanian magmatics include 4 superunits such as the Yaohe, Huangbai, Penghe and Dahongyan superunits which are closely related to the Dabie orogenic process and recorded an orogenic history from the ending of regional MP metamorphism to the overprinting of the Circum Pacific tectonic domain. The faults in the area include the early stage thrust faults, late stage decollement faults and later stage overprinting strike slip and some thrust faults. Based on these features, the Dabie orogenic process can be divided into 5 stages i.e. the early B type subduction stage, the A type subduction stage, the main collisional stage, the late orogenic uplifting and decollement stage and the post orogenic overprinting stage. Consequently, the Dabie orogenic belt should be a Mesozoic collisional type orogenic belt and has an evolutional history similar to the other typical orogenic belt in the world such as Alps and Himalaya.

关键词： Eclogite Metamorphism Magmatism Fault Orogenic model Dabie Mountains

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

文化精准扶贫案例研究——以马鞍村、下党村和赤溪村为例

引用

图书馆杂志 2016年第9期35卷 14-17页

作者：张春景张喆昱上海图书馆

文化扶贫不仅是扶贫的重要工作内容,更关系到扶贫成果的可持续性。本文在实地调研的基础上,从三个村的基本情况入手,总结了三个村致贫的原因和脱贫的相关措施,具体分析了三个村在文化扶贫上的需求和存在的问题,希望能为推进文化精准扶... 详细信息

文化扶贫不仅是扶贫的重要工作内容,更关系到扶贫成果的可持续性。本文在实地调研的基础上,从三个村的基本情况入手,总结了三个村致贫的原因和脱贫的相关措施,具体分析了三个村在文化扶贫上的需求和存在的问题,希望能为推进文化精准扶贫工作找到路径和入口。

关键词：文化精准扶贫需求案例

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

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

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

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：