检索结果-南通市图书馆

Dechlorination of carbon tetrachloride by the catalyzed Fe-Cu process

Journal of Environmental Sciences 2007年第7期19卷 792-799页

作者： XU wen-ying GAO Ting-yao The National Engineering Research Center for Urban Pollution Control Tongji University Shanghai 200092 China.

The dectrochemical reduction characteristics of carbon tetrachlofide （CT） were investigated using cyclic voltammetry in this study. In addition, the difference in reduction mechanisms of CT between Master Builders＇ iron and the catalyzed Fe-Cu process was discussed. The results showed that CT was reduced directly on the surface of copper rather than by atomic hydrogen produced at the cathode in the catalyzed Fe-Cu process. The reduction was realized largely by atomic hydrogen in Master Builders＇ iron. The entire CT in 350 ml aqueous solution with 320 mg/L was reduced to trichloromethane and dichloromethane in 2.25 h when 100 g of scrap iron with Fe/Cu ratio of 10：1 （w/w） were used. Moreover, the reduction rate slowed with time. CT could be reduced at acidic, neutral and alkaline pH from solution by Fe-Cu bimetallic media, but the mechanisms were different. The degradation rate was not significantly influenced by pH in the catalyzed Fe-Cu process; in Master Builders＇ iron it clearly increased with decreasing pH. The kinetics of the reductions followed pseudo-first order in both cases. Furthermore, the reductions under acidic conditions proceeded faster than that under the neutral and alkaline conditions. The catalyzed Fe-Cu process was superior to Master Builders＇ iron in treating CT-containing water and this advantage was particularly noticeable under alkaline conditions. The reduction was investigated in the cathode （Cu） and anode （Fe） compartments respectively, the results showed that the direct reduction pathway played an important role in the reduction by the catalyzed Fe-Cu process. The catalyzed Fe-Cu process is of practical value.

关键词： carbon tetrachloride electrochemical reduction characteristics catalyzed Fe-Cu process reduction mechanisms

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

Evaluating effective Trichoderma isolates for biocontrol of Rhizoctonia solani causing root rot of Vigna unguiculata

引用

Journal of Integrative Agriculture 2019年第9期18卷 2072-2079页

作者： WANG Chao ZHUANG wen-ying State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

The highly diverse genus Trichoderma has provided many formulations that are alternatives to the chemical pesticides in *** present study was undertaken to investigate the biocontrol potential of eight Trichoderma species,***,***,***,***,***,***,*** and ***,against the phytopathogenic fungus Rhizoctonia *** isolates were first evaluated in vitro by dual culture tests for their antagonism,mycoparasitic ability and antifungal activity against *** growth promoting potential was further assessed in relation to phosphate solubilization,indole acetic acid and siderophore *** of the isolates were selected and evaluated for their abilities to prompt plant growth and to control *** infecting Vigna unguiculata(cowpea)seedlings in *** most effective isolates,*** 9185 and *** 8702,significantly(P<0.05)reduced the disease severity incidences(36.6 and 45.0%,respectively)and promoted plant growth,which have good prospects for application.

关键词： antagonism growth promoting hydrolytic enzymes mycoparasitism

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

Property of Self-similar-like Set

引用

Acta Mathematicae Applicatae Sinica 2015年第2期31卷 375-386页

作者： Zhi-ying wen Xuan ZHAO Department of Mathematical Sciences Tsinghua University National Education Examinations Authority

Self-similar sets（SSS） are the most important class of Fractals and play an important role in the studies in Fractal. In this note, we introduce self-similar-like sets（SSLS） which generalize self-similar sets,we will show some properties of SSLS which distinguish essentially that of SSS, and we will give also some applications of SSLS.

关键词： self-similar sets self-similar-like set generating set Hausdorff dimension

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

Coal-based energychemicalengineering:Pay one’srespectsto ***

引用

Chinese Journal of Chemical Engineering 2021年第7期34卷 1-2页

作者： wen-ying Li Jinlong Gong Taiyuan University of Technology China Tianjin University China

Coal is of utmost importance for the energy and chemical engi-neering fields of China,as it contributes to 56.8%of primary energy supply in 2020 in the *** the one hand,coal is the major source of energy and resources for its rich endowment in China;However,on the other hand,it is the major source of environmen-tal pollution due to the implementation of outdated ***,according to Professor Kechang Xie in 2004,“The only way out is to develop and promote the clean and efficient coal uti-lization technologies”.In the past 40 years,China has made a sig-nificant progress in research and development related to modern coal chemical engineering,including lab-scale fundamental research and industrial-scale construction of many giant chemical plants.

关键词： energy chemical dated

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

Theoretical Studies on N_2H+O Reaction

引用

Chemical Research in Chinese Universities 2008年第3期24卷 371-377页

作者： LU ying-wen LU wen-cai SU Zhong-min Jinan Vocational College Jinan 250100 P. R. China State Key Laboratory of Theoretical and Computational Chemistry Jilin University Changchun 130023 P. R. China Institute of Functional Material Chemistry Northeast Normal University Changchun 130024 P. R. China

The N2H＋O potential energy profile was studied at the CCSD（T）/6-311G＋＋（df,p）//MP2/6-311G（d,p） level. Reactions associated with four intermediates（cis-HNNO, trans-HNNO, NNHO, and NNOH） were investigated. The results indicate that N2H＋O reaction toward H＋N2O is more favored than that toward N2＋OH, consistent with previous experimental studies. The pathways for the two reactions are found to go through cis-HNNO, transition state, and finally to the products. The N2H＋O→NH＋NO reaction was studied in detail. Product NO in such a reaction is likely to occur via cis-HNNO, followed by trans-HNNO, and finally dissociates into NH＋NO. These results suggest that N2H＋O→NH＋NO is an important channel in NO production.

关键词： N2H+O NH+NO Potential energy profile

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

Periodic codings of algebraic graph-directed IFS

引用

Science China Mathematics 2015年第1期58卷 131-142页

作者： wen Zhi ying YANG Ya Min Department of Mathematical Sciences Tsinghua University College of Science Huazhong Agricultural University

We study the points with periodic codings of a class of graph-directed iterated function systems on with algebraic parameters （which we call algebraic GIFS）. It is shown that the set of points with periodic codings is closely related to the Rauzy box. Especially for the feasible Pisot GIFS, this set is completely characterized by the Rauzy box; this result unifies and extends the previous results on the study of periodic points of classical and generalized β-transformations.

关键词： algebraic GIFS periodic coding Rauzy box

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

Organelle targetable fluorescent probes for hydrogen peroxide

引用

Chinese Chemical Letters 2019年第10期30卷 1834-1842页

作者： ying wen Fangjun Huo Caixia Yin Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education Key Laboratory of Materials for Energy Conversion and Storage of Shanxi ProvinceInstitute of Molecular ScienceShanxi UniversityTaiyuan 030006China Research Institute of Applied Chemistry Shanxi UniversityTaiyuan 030006China

Hydrogen peroxide(H2 O2), as important products of oxygen metabolism, plays an important role in many biological processes, such as immune responses and cellular signal transduction. However, abnormal production of H2 O2 can damage cellular biomolecules, which was closely associated with many ***, it is urgent to monitor the level change of H2 O2 in living cells, particularly at subcellular *** this end, a wide variety of H2 O2 fluorescent probes have been designed, developed and applied for imaging of H2 O2 in subcellular levels. In this review, we highlight the representative cases of H2 O2 fluorescent probes with mitochondria, nuclei and lysosomes-targetable ability. The review contains organelle target strategies, structures, fluorescence behavior and biological applications of these probes.

关键词： Hydrogen peroxide Fluorescence probes Mitochondria target Nuclei target Lysosomes target Living cells

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

Novel strategy for accurate tumor labeling:endogenous metabolic imaging through metabolic probes

引用

Science China Chemistry 2022年第12期65卷 2517-2527页

作者： ying wen Zhiqing Long Fangjun Huo Caixia Yin Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education Key Laboratory of Materials for Energy Conversion and Storage of Shanxi ProvinceInstitute of Molecular ScienceShanxi UniversityTaiyuan030006China Research Institute of Applied Chemistry Shanxi UniversityTaiyuan030006China

Altered metabolism has long been recognized as a central hallmark of cancer;however,in the fluorescence imaging field,few studies have been conducted to label tumors by exploiting metabolic differences between cancer cells and normal *** this work,we successfully developed a metabolic probe MB-C for specific imaging of glutathione(GSH)dynamic metabolic *** was endogenously metabolized to produce SO_(2)via Na_(2)S_(2)O_(3) and thiosulfate sulfurtransferase,equilibrating with sulfites/***-C was allowed to be activated by GSH along with multi-fluorescence emission increased in red and green channels and further sequence-response metabolites(SO_(2))of GSH in significant fluorescence ratio change of red and green ***,such evident fluorescence ratio changes could be used to distinguish cancer cells from normal cells and identify tumor and normal ***,GSH metabolic imaging was successfully applied to accurately label tumors,which provides a new idea and practical case for the precise visualization of malignant tumors.

关键词： molecular probe metabolic imaging tumor labeling GSH

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

Effect of solution cooling rate on the γ′ precipitation behaviors of a Ni-base P/M superalloy

引用

Journal of University of Science and Technology Beijing 2008年第6期15卷 729-734页

作者： Gaofeng Tian Chengchang Jia ying wen Benfu Hu School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

The effect of cooling rate on the cooling γ′ precipitation behaviors was investigated in a Ni-base powder/metallurgy （P/M） superalloy （FGH4096）. The empirical equations were established between the cooling rate and the average sizes of secondary and tertiary γ′ precipitates within grains and tertiary γ′ precipitates at grain boundaries, as well as the apparent width of grain boundaries. The results show that the average sizes of secondary or tertiary γ′ precipitates are inversely correlated with the cooling rate. The shape of secondary γ′ precipitates within grains changes from butterfly-like to spherical with the increase of cooling rate, but all the tertiaryγ′ precipitates formed are spherical in shape. It is also found that tertiary γ′ may be precipitated in the latter part of the cooling cycle only if the cooling rate is not faster than 4.3℃/s, and the apparent width of grain boundaries decreases linearly with the increase of cooling rate.

关键词： powder metallurgy Ni-base superalloy precipitates cooling rate

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

Jilun Li and his profound impact on theoretica and applied agricultural microbiology

引用

Protein & Cell 2017年第3期8卷 159-161页

作者： Chengbo Rong Yu Liu ying wen Institute of Plant and Environment Protection Beijing Academy of Agriculture and Forestry Sciences Beijing Engineering Research Center for Edible Mushroom Beijing 100097 China State Key Laboratory of Agrobiotechnology and College of Biological Sciences China Agricultural University Beijing 100193 China

The microbiologist Jilun Li＇s excellent work on microbial secondary metabolites and biological nitrogen fixation has made significant contributions to agriculture and has created enormous economic and social benefits in China. He has received many honors throughout his career and was elected as an academician of the Chinese Academy of Sciences in 1995.

关键词： impact profound Jilun

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：