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HALF-TITANOCENE CHLORIDES 2-(BENZIMIDAZOL-2-YL)QUINOLIN-8-OLATES: SYNTHESIS, CHARACTERIZATION AND ETHYLENE (CO-)POLYMERIZATION BEHAVIOR

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Chinese Journal of Polymer Science 2013年第4期31卷 601-609页

作者： wen-juan zhang Wei Huang Tong-ling Liang 孙文华 Key laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science Institute of ChemistryChinese Academy of Sciences

A series of half-titanocene chloride 2-（benzimidazol-2-yl）quinolin-8-olates C1-C6 were synthesized by treating the lithium salts of the ligand with CpTiCI3. All the complexes were characterized by 1H-NMR, 13C-NMR and elemental analyses, and the crystal structure of C3 and C6 was measured by X-ray. These half-titanocene complexes showed moderate catalytic activities toward ethylene polymerization （up to 1840 kg·mol-1（Ti）·h-1） when activated with MMAO, affording the high molecular weight polymers. And they also exhibited good activity for copolymerization of ethylene and a-olefin with low content of co-monomer.

关键词： Half-titanocene 2-(Benzimidazol-2-yl)quinolin-8-ol Ethylene polymerization Co-polymerization.

Fabrication of azobenzene-functionalized porous polymers for selective CO_(2) capture

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Chinese Journal of Chemical Engineering 2022年第3期35卷 24-30页

作者： Ding-Ming Xue wen-juan zhang Xiao-Qin Liu Shi-Chao Qi Lin-Bing Sun State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

Many solid adsorbents have been prepared for the CO_(2)*** particular,the photoresponsive adsorbents have attracted extensive interests because of their tunable pore structure and variable responsive behaviors provoked by the external ***,it is challenging to fabricate the photoresponsive adsorbents featured the big CO_(2)capacity and high CO_(2)***,copolymerized between 4-phenylazobenzoyl chloride,2,4,6-trichloro-1,3,5-triazine and melamine,a series of azobenzenefunctionalized porous polymers(PTM-AZOs)are successfully *** PTM-AZOs are verified in possession of proper pore structures,large surface area and photoconductive properties through a series of *** PTM-AZO-2 with the trans-isomerization exhibits the best CO_(2)adsorption amount of 2.7 mmol·g^(-1)(273 K and 0.1 MPa),while the CO_(2)/N_(2)selectivity can reach 2459 and 607 on the trans-and cis-isomerization,*** regulatable pore structures controlled by the photoresponsive azobenzene groups affect the CO_(2)capture performance of the PTM-AZOs.

关键词： Adsorption CO_(2)capture Selectivity Azobenzene Photoresponse

A new phenolic lactone from the bark of Phellodendron chinense

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Chinese Chemical Letters 2009年第8期20卷 958-960页

作者： Xue Hu Li wen juan zhang Huan Yang Qi Yan Ping Shi Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 China The Graduate University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100039 China

A new phenolic lactone, named phellolactone （1） was isolated from the bark of Phellodendron chinense Schneid and its structure was elucidated by means of extensively spectroscopic methods, including IR, UV, HRESI-MS and NMR techniques. ？2009 Yah Ping Shi. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： PheUodendron chinense Rutaceac Phellolactone

Comparative Analysis of Codon Usage Patterns Among Mitochondrion, Chloroplast and Nuclear Genes

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Journal of Integrative Plant Biology 2007年第2期49卷 246-254页

作者： wen-juan zhang Jie Zhou Zuo-Feng Li Li Wang Xun Gu Yang Zhong Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering School of Life Sciences Fudan University Shanghai 200433 China Department of Genetics and Cell Biology Center for Bioinformatics and Biological Statistics Iowa State University Ames IA 50011 USA Shanghai Center for Bioinformation Technology Shanghai 201203 China

In many organisms, the difference in codon usage patterns among genes reflects variation in local base compositional biases and the intensity of natural selection. In this study, a comparative analysis was performed to investigate the characteristics of codon bias and factors in shaping the codon usage patterns among mitochondrion, chloroplast and nuclear genes in common wheat （Triticum aestivum L.）. GC contents in nuclear genes were higher than that in mitochondrion and chloroplast genes. The neutrality and correspondence analyses indicated that the codon usage in nuclear genes would be a result of relative strong mutational bias, while the codon usage patterns of mitochondrion and chloroplast genes were more conserved in GC content and influenced by translation level. The Parity Rule 2 （PR2） plot analysis showed that pyrimidines were used more frequently than purines at the third codon position in the three genomes. In addition, using a new alterative strategy, 11, 12, and 24 triplets were defined as preferred codons in the mitochondrion, chloroplast and nuclear genes, respectively. These findings suggested that the mitochondrion, chloroplast and nuclear genes shared particularly different features of codon usage and evolutionary constraints.

关键词： chloroplast codon usage mitochondrion neutral mutation nuclear gene selection constraint Triticum aestivum.

Monomorphic epitheliotropic intestinal T-cell lymphoma with bone marrow involved: A case report

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World Journal of Clinical Cases 2024年第4期12卷 814-819页

作者： Fen-juan zhang wen-juan Fang Cang-Jian zhang Department of Hematology Lishui Municipal Central HospitalLishui 323000Zhejiang ProvinceChina

BACKGROUND Monomorphic epithelial intestinal T-cell lymphoma(MEITL)is a rare type of peripheral T-cell *** clinical manifestations are diarrhea,abdominal pain,perforation and an abdominal *** SUMMARY We present a 52-year-old female patient who was diagnosed with *** disease progression was observed after multiline ***,the patient died of a severe *** MEITL is a rare intestinal primary T-cell lymphoma with aggressive behavior,a high risk of severe life-threatening complications,and a poor prognosis.

关键词： Monomorphic epithelial intestinal T-cell lymphoma Autologous stem cell transplantation Chemotherapeutics Case report

A multi-stream network for retrosynthesis prediction

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Frontiers of Computer Science 2024年第2期18卷 231-233页

作者： Qiang zhang juan LIU wen zhang Feng YANG Zhihui YANG Xiaolei zhang Institute of Artificial Intelligence School of Computer ScienceWuhan UniversityWuhan 430072China College of Informatics Huazhong Agricultural UniversityWuhan 430072China

1 Introduction Retrosynthesis aims to predict a set of reactants for producing given molecules[1],which plays a significant part in the biochemistry field,such as molecular pathway design and drug *** existing methods perform better in solving this problem,most of these methods[2,3]only describe the molecules from one kind of perspective,such as they use Simplified Molecular Input Line Entry System(SMILES)strings[4]to represent the atomic components and the relationship between atoms of molecules or leverage Extended Connectivity Fingerprints(ECFPs)represent the information of the molecular sub-structure composition via binary vectors[5].

关键词： synthesis reactant hough

Robust Sequential Covariance Intersection Fusion Kalman Filtering over Multi-agent Sensor Networks with Measurement Delays and Uncertain Noise Variances

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自动化学报 2014年第11期40卷 2632-2642页

作者： QI wen-juan zhang Peng DENG Zi-Li Department of Automation Heilongjiang University Harbin 150080 China

This paper deals with the problem of designing robust sequential covariance intersection (SCI) fusion Kalman filter for the clustering multi-agent sensor network system with measurement delays and uncertain noise variances. The sensor network is partitioned into clusters by the nearest neighbor rule. Using the minimax robust estimation principle, based on the worst-case conservative sensor network system with conservative upper bounds of noise variances, and applying the unbiased linear minimum variance (ULMV) optimal estimation rule, we present the two-layer SCI fusion robust steady-state Kalman filter which can reduce communication and computation burdens and save energy sources, and guarantee that the actual filtering error variances have a less-conservative upper-bound. A Lyapunov equation method for robustness analysis is proposed, by which the robustness of the local and fused Kalman filters is proved. The concept of the robust accuracy is presented and the robust accuracy relations of the local and fused robust Kalman filters are proved. It is proved that the robust accuracy of the global SCI fuser is higher than those of the local SCI fusers and the robust accuracies of all SCI fusers are higher than that of each local robust Kalman filter. A simulation example for a tracking system verifies the robustness and robust accuracy relations.

关键词： Kalman滤波传感器网络测量不确定噪声方差网络延迟多代理卡尔曼滤波器协方差

A Novel Method for Fabrication of a Glass-Electrode-Based Lipase Sensor

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Chinese Chemical Letters 2001年第5期12卷 453-456页

作者： Xi Rong HUANG Yue Zhong LI Guo Liang YANG Li Li LIU Yin Bo QU wen juan zhang State Key Lab of Microbial Technology of China Shandong UniversityJinan 250100 Key Lab for Colloid and Inferface Chemistry of the Education Ministry of China Shandong UniversityJinan 250100

Based on an unusual reversible sol-gel transition phenomenon. a novel method for the fabrication of a lipase electrode was developed. The response characteristics of the biosensor was studied by potentiometric technique using olive oil as substrate. After optimization, the lipase electrode demonstrated high activity and good stability.

关键词： Lipase microemulsion-based gel biosensor response characteristics.

A Highly Sensitive Kinetic Spectrophotometric System and Its Analytical Potential for Chromatographic Detection of Metal Ions

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Chinese Chemical Letters 1999年第1期10卷 51-54页

作者： Xi Rong HUANG wen juan zhang Shu Hua HAN Gut Ying XU(College of Chemistry, Shandong University, Jinan 250100) College of Chemistry Shandong University Jinan 250100 China

Based on the inhibitory effect of metal ions on the decolourization reaction of a dye taking place in a mixed micellar medium, a differential rate method was developed for the detection of metal ions. The present kine... 详细信息

关键词： mixed micellar media decolourization reaction bromopyrogallol red metal ions inhibitor spectrophotometry method development