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Simultaneous removal of NO and dichloromethane(CH_(2)Cl_(2)) over Nb-loaded cerium nanotubes catalyst

Journal of Environmental Sciences 2022年第1期34卷 175-184页

作者： Weilong Ouyang Yi Zhou Xiaoqi Fei Yarong Bai Haiqiang Wang Zhongbiao Wu key laboratory of Environment Remediation and Ecological Health Ministry of EducationCollege of Environmental and Resources ScienceZhejiang UniversityHangzhou 310058China Zhejiang provincial Engineering Research Center of Industrial Boiler and Furnace Flue Gas Pollution Control Hangzhou 310058China

Herein,a series of niobium oxide supported cerium nanotubes(Ce NTs)catalysts with different loading amount of Nb_(2)O_(5)(0–10 wt.%)were prepared and used for selective catalytic reduction of NOxwith NH_(3)(NH_(3)-SCR)in the presence of CH_(2)Cl_(2).Commercial V_(2)O_(5)-WO_(3)-TiO_(2) catalyst was also prepared for *** physcial properties and chemical properties of the Nb_(2)O_(5) loaded cerium nanotubes catalysts were investigated by X-ray diffractometer,Transmission electron microscope,Brunauer-Emmett-Teller specific surface area,H_(2)-temperature programmed reduction,NH_(3)-temperature programmed desorption and Xray photoelectron *** experiment results showed that the loading amount of Nb_(2)O_(5) had a significant effect on the catalytic performance of the catalysts.10 wt.%Nb-Ce NTs catalyst presented the best NH_(3)-SCR performance and degradation efficiency of CH_(2)Cl_(2) among the prepared catalysts,due to its superior redox capability,abundant surface oxygen species and acid sites,the interaction between Nb and Ce,higher ratio of Nb^(4+)/(Nb^(5+)+Nb^(4+))and Ce^(3+)/(Ce^(3+)+Ce^(4+)),as well as the special tubular structure of cerium *** study may provide a practical approach for the design and synthesis of SCR catalysts for the simultaneously removal NOxand chlorinated volatile organic compounds(CVOCs)emitted from the stationary industrial sources.

关键词： Cerium nanotubes Niobium oxide Selective catalytic reduction Nitrogen oxides CH_(2)Cl_(2) Simultaneous removal

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Endophytic bacteria associated with endangered plant Ferula sinkiangensis K. M. Shen in an arid land： diversity and plant growth-promoting traits

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Journal of Arid Land 2017年第3期9卷 432-445页

作者： LIU Yonghong GUO Jianwei LI Li Mipeshwaree D ASEM ZHANG Yongguang Osama A MOHAMAD Nimaichand SALAM LI Wenjun key laboratory of Biogeography and Bioresource in Arid Land Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China University of Chinese Academy of Sciences Beijing 100049 China key laboratory of Crops with High Quality and Efficient Cultivation and Security Control Yunnan Higher Education Institutions Honghe University Mengzi 661100 China State key laboratory of Biocontrol and Guangdong provincial key laboratory of Plant Resources School of Life Sciences Sun Yat-Sen University Guangzhou 510275 China Environmental Science Department Institute for Post Graduate of Environment Study Arish University Arish 45511 Egypt

Ferula spp. are traditional medicinal plants found in arid land. Large-scale excavation for extracting bioactive compounds from the plants in arid regions of Xinjiang over the last few years has, however, significandy decreased their distributions. Due to the urgent need for preservation of these plant resources, along with the need of searching for alternative source of the useful metabolites, it is important to screen the endophytic microbial resources associated with the plant Ferula sinkiangensis K. M. Shen. In the study, a total of 125 endophytic bacteria belonging to 3 phyla, 13 orders, 23 families, and 29 genera were isolated based on 16S rRNA gene sequencing data. Among the different isolates, three strains isolated from roots were potential novel species of the genera Porphyrobacter, Paracoccus and draycofatopsis. In this study, 79.4% and 57.1% of the total isolates were capable of producing indole-3-acetic acid （IAA） and siderophore, respectively. And, 40.6% of the strains inhibit the growth of fungal pathogen Afternaria alternata, 17.2% and 20.2% strains were positive for antagonism against Vertidllium dahlia 991 and V. dahlia 7, respectively. These results demonstrated that E sinkiangensis is a rich reservoir of endophytic bacterial resources with potential for production of biologically important functions such as plant growth-promoting factors.

关键词： endophytic bacteria Ferula sinkiangensis endangered species growth promoting

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The distribution patterns and temporal dynamics of carabid beetles(Coleoptera:Carabidae)in the forests of Jiaohe,Jilin Province,China

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Journal of Forestry Research 2022年第1期33卷 333-342页

作者： Shengdong Liu Shirui Dong Ruitong Liu Qingfan Meng Yan Li Hongrui Zhao Yinghua Jin Jilin provincial key laboratory of Insect Biodiversity and Ecosystem Function of Changbai Mountains Beihua UniversityJilin 132013People’s Republic of China Forestry College of Beihua University Jilin 132013People’s Republic of China key laboratory of Geographical Processes and Ecological Security of Changbai Mountains Ministry of EducationSchool of Geographical SciencesNortheast Normal UniversityChangchun 130024People’s Republic of China

Carabid beetles,predatory insects,are abundant in forests and sensitive to environmental *** distribution patterns and diversity of carabid beetles in several natural forests were studied to provide a basis for evaluating the importance of a forest in the protection of carabid beetle *** were captured by pitfall traps during their seasonal activity from 2012 to 2013 in a poplar-birch forest,ash-walnut forest and broad-leaved Korean pine forest.A total of 5252 individuals,representing 21 species,were *** abundance was highest in the broad-leaved Korean pine forest and lowest in the ash-walnut *** billbergi Mannerheim and Pterostichus pertinax(Tschitscherine)were the dominant beetle species in each *** canaliculatus Adams was dominant in the poplar-birch and ash-walnut forests,and Leistus niger Gebler was dominant in the ash-walnut *** carabids were affected differently by stand *** and *** was positively correlated with mean *** and *** were not positively correlated with any stand *** broad-leaved Korean pine forest with greater age,large DBH and thick leaf litter fostered a high diversity of carabid *** main yearly activity period for most carabids was during *** carabid species responded differently to seasonality,and the activity period of several species was relatively late(August)in the year.

关键词： Carabid beetles Stand type Stand factors Temporal dynamics Distribution patterns Ordinal dates

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Decomposition behaviors of methane hydrate in porous media below the ice melting point by depressurization

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Chinese Journal of Chemical Engineering 2019年第9期27卷 2207-2212页

作者： Yu Zhang Tian Wang Xiaosen Li Kefeng Yan Yi Wang Zhaoyang Chen Guangzhou Institute of Energy Conversion Key Laboratory of Gas HydrateChinese Academy of SciencesGuangzhou 510640China Guangdong provincial key laboratory of New and Renewable Energy Research and Development Guangzhou 510640China Guangzhou Center for Gas Hydrate Research Chinese Academy of SciencesGuangzhou 510640China University Science&Technology of China Nano Science&Technology InstituteSuzhou 215123China

The decomposition behaviors of methane hydrate below the ice melting point in porous media with different particle size and different pore size were *** silica gels with the particle size of 105–150μm,150–200μm and 300–450μm,and the mean pore diameters of 12.95 nm,17.96 nm and 33.20 nm were used in the *** recovery and temperature change curves were determined for each *** hydrate decomposition process in the experiments can be divided into the depressurization period and the isobaric *** temperature in the system decreases quickly in the depressurization process with the hydrate decomposition and reaches the lowest point in the isobaric *** hydrate decomposition in porous media below ice-melting point is very fast and no self-perseveration effect is *** hydrate decomposition is influenced both by the driving force and the initial hydrate *** the experiments with the high hydrate saturation,the hydrate decomposition will stop when the pressure reaches the equilibrium dissociation *** stable pressure in the experiment with high hydrate saturation exceeds the equilibrium dissociation pressure of bulk hydrate and increases with the decrease of the pore size.

关键词： Methane hydrate Depressurization Porous media Decomposition Ice-melting point

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Unveiling degradation mechanism of PAHs by a Sphingobium strain from a microbial consortium

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mLife 2022年第3期1卷 287-302页

作者： Lige Zhang Huan Liu Junbiao Dai Ping Xu Hongzhi Tang State key laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental Sciencesand School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghaiChina CAS key laboratory of Quantitative Engineering Biology Guangdong Provincial Key Laboratory of Synthetic Genomics and Shenzhen Key Laboratory of Synthetic GenomicsShenzhen Institute of Synthetic BiologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhenChina

Polycyclic aromatic hydrocarbons(PAHs)are a class of persistent pollutants with adverse biological effects and pose a serious threat to ecological environments and human *** previously isolated phenanthrene‐degrading bacterial consortium(PDMC)consists of the genera Sphingobium and Pseudomonas and can degrade a wide range of *** identify the degradation mechanism of PAHs in the consortium PDMC,metagenomic binning was conducted and a Sphingomonadales assembly genome with 100%completeness was ***,Sphingobium ***‐2,an efficient degrader of PAHs,was successfully isolated from the consortium *** SHPJ‐2 has powerful degrading abilities and various degradation pathways of high‐molecular‐weight PAHs,including fluoranthene,pyrene,benzo[a]anthracene,and *** ring‐hydroxylating dioxygenases,five cytochrome P450s,and a pair of electron transfer chains associated with PAH degradation in strain SHPJ‐2,which share 83.0%–99.0%similarity with their corresponding homologous proteins,were identified by a combination of Sphingomonadales assembly genome annotation,reverse‐transcription quantitative polymerase chain reaction and heterologous ***,when coexpressed in Escherichia coli BL21(DE3)with the appropriate electron transfer chain,PhnA1B1 could effectively degrade chrysene and benzo[a]anthracene,while PhnA2B2 degrade ***,these results provide a comprehensive assessment of strain SHPJ‐2 and contribute to a better understanding of the molecular mechanism responsible for the PAH degradation.

关键词： metagenomic binning analysis P450 polycyclic aromatic hydrocarbons ring‐hydroxylating dioxygenase Sphingobium

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Bayesian networks modeling for thermal error of numerical control machine tools

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第11期9卷 1524-1530页

作者： Xin-hua YAO Jian-zhong FU Zi-chen CHEN College of Mechanical and Energy Engineering Zhejiang University Hangzhou 310027 China Zhejiang provincial key Lab of Advanced Manufacturing Technology Hangzhou 310027 China

The interaction between the heat source location, its intensity, thermal expansion coefficient, the machine system configuration and the running environment creates complex thermal behavior of a machine tool, and also makes thermal error prediction difficult. To address this issue, a novel prediction method for machine tool thermal error based on Bayesian networks (BNs) was presented. The method described causal relationships of factors inducing thermal deformation by graph theory and estimated the thermal error by Bayesian statistical techniques. Due to the effective combination of domain knowledge and sampled data, the BN method could adapt to the change of running state of machine, and obtain satisfactory prediction accuracy. Ex- periments on spindle thermal deformation were conducted to evaluate the modeling performance. Experimental results indicate that the BN method performs far better than the least squares (LS) analysis in terms of modeling estimation accuracy.

关键词： Bayesian networks (BNs) Thermal error model Numerical control (NC) machine tool

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Regulation network and expression profiles of Epstein-Barr virus-encoded microRNAs and their potential target host genes in nasopharyngeal carcinomas

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Science China(Life Sciences) 2014年第3期57卷 315-326页

作者： ZENG ZhaoYang HUANG HongBin HUANG LiLi SUN MengXi YAN QiJia SONG YaLi WEI Fang BO Hao GONG ZhaoJian ZENG Yong LI Qiao ZHANG WenLing LI XiaYu XIANG Bo LI XiaoLing LI Yong XIONG Wei LI GuiYuan Hunan provincial Tumor Hospital Xiangya School of MedicineCentral South University key laboratory of Carcinogenesis of Ministry of Health Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of EducationCancer Research InstituteCentral South University Hunan key laboratory of Nonresolving Inflammation and Cancer Disease Genome Research CenterThe Third Xiangya HospitalCentral South University key laboratory of Information System Engineering National University of Defense Technology Department of Biochemistry and Molecular Biology and Center for Genetics and Molecular Medicine School of MedicineUniversity of Louisville

Epstein-Barr virus(EBV)is associated with nasopharyngeal carcinoma(NPC)***,the mechanism(s)connecting EBV infection and NPC remain ***,a new class of EBV microRNAs(miRNAs)has been *** determine how EBV miRNAs control the expression of host genes,and to understand their potential role in NPC tumorigenesis,we profiled the expression of 44 mature EBV miRNAs and potential host genes in NPC and non-tumor nasopharyngeal epithelial *** found that 40 EBV miRNAs from the BART transcript were highly expressed in *** of potential BART miRNA target genes revealed that 3140 genes and several important pathways might be involved in the carcinogenesis of NPC.A total of 105 genes with potential EBV miRNA binding sites were significantly downregulated,suggesting that EBV miRNAs may regulate these genes and contribute to NPC *** EBV miRNA and host gene regulation network was generated to provide useful clues for validating of EBV miRNA functions in NPC tumorigenesis.

关键词： Epstein-Barr virus (EBV) microRNA (miRNA) nasopharyngeal carcinoma (NPC) gene regulate network

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The construction of drug-resistant cancer cell lines by CRISPR/Cas9 system for drug screening

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Science Bulletin 2018年第21期63卷 1411-1419页

作者： Lingmin Zhang Ying Li Qinghua Chen Yong Xia Wenfu Zheng Xingyu Jiang CAS Center for Excellence in Nanoscience Beijing Engineering Research Center for BioNanotechnologyCAS Key Laboratory for Biological Effects of Nanomaterials and NanosafetyNational Center for NanoScience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Guangdong provincial key laboratory of Molecular Target &Clinical Pharmacology School of Pharmaceutical Sciences and the Third &Fifth Affiliated HospitalGuangzhou Medical UniversityGuangzhou 511436China

Cancer therapy is often hampered by the rapid emergence of drug resistance. Drug-resistant cellular models are essential for understanding the drug resistance and developing new therapeutics. The low efficiency and long time required in creating these models are major obstacles hindering drug resistance research and drug screening. Herein, we report an approach that can accelerate(shortening the time from years to 3 weeks) the establishment of cancer cell line-based, inheritable drug resistance models by specific knockout of MED12 gene using CRISPR/Cas9 system. The resultant MED12^(KO) A375(melanoma)cell line was resistant to inhibitors of B-Raf proto-oncogene, serine/threonine kinase(BRAF), whereas the resultant MED12^(KO) PC9(non-small cell lung cancer) cell line was resistant to inhibitors of epidermal growth factor receptor(EGFR). Evaluation of anti-cancer drugs and their combinations shows that certain combinations of BRAF inhibitors and TGF-β receptor(TGF-βR) inhibitors are active in suppressing the growth of MED12^(KO) A375 cells, and a few combinations of EGFR inhibitors and TGF-βR inhibitors were active in suppressing the growth of MED12^(KO) PC9 cells. The drug-resistant models will be useful in screening novel drugs and drug combinations for multi-drug-resistant cancer therapy.

关键词： CRISPR/Cas9 Drug resistance Cancer Cell line Gene editing

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Design and fabrication of a new fluorescence enhancement system of silver nanoparticles-decorated aligned silver nanowires

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Rare Metals 2019年第12期38卷 1178-1186页

作者： Jian-Chao Wang Hong-Sheng Luo Ming-Hai Zhang Xi-Hong Zu Jie Zhang Yu-Xin Gu Guo-Bin Yi School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Guangdong provincial key laboratory of Advanced Coatings Research and Development China National Electric Apparatus Research Institute Co.Ltd.Guangzhou 510300China

A new substrate,aligned Ag nanowires decorated with silver nanoparticle composite structure(AgNWs@AgNPs),was fabricated to investigate metalenhanced fluorescence(MEF) and its *** new composite structure was fabricated via a three-phase interface assembly method followed by SnCl2 sensitization and AgNO3 reduction *** size and distribution of the nanoparticles on silver nanowires increased with the sensitization and reduction *** formation of AgNPs on the surfaces of AgNWs was confirmed by multiple characterization methods including scanning electron microscopy(SEM),transmission electron microscope(TEM),atomic force microscopy(AFM) and X-ray diffraction(XRD).The results show that the fluorescence intensity of the poly(3-hexylthiophene)(P3HT) on the composite structure was greatly enhanced compared with that on bare glass substrate,and the intensity increased with the increase in particle sizes and *** mechanism was basedo n the increase in excitation rate and the radiation decay *** new type of substrate could serve as a good and efficient MEF substrate for high-performance fluorescence-based devices.

关键词： Fluorescence enhancement Aligned Ag nanowires Self-assembly Mechanism

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The interface structure and property of magnesium matrix composites:A review

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Journal of Magnesium and Alloys 2024年第7期12卷 2595-2623页

作者： Hongwei Xiong Lidong Gu Jingya Wang Liping Zhou Tao Ying Shiwei Wang Haitao Zhou Jianbo Li Yang Gao Xiaoqin Zeng National Engineering Research Center of Light Alloy Net Forming and State key laboratory of Metal Matrix Composite Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Spaceflight Precision Machinery Institute Shanghai 201600China College of Materials Science and Engineering Chongqing UniversityChongqing 400045China Guizhou provincial key laboratory for aero-engine rotors structural integrity Guiyang 550081China

Magnesium matrix composites have garnered significant attention in recent years owing to their exceptional lightweight properties and notable potential in various engineering *** interface generally acts as a“bridge”between the matrix and reinforcement,playing crucial roles in critical processes such as load transfer,failure behavior,and carrier transport.A deep understanding of the interfacial structures,properties,and effects holds paramount significance in the study of *** paper presents a comprehensive review of prior researches related to the interface of Mg matrix ***,the different interfacial structures and interaction mechanisms encompassing mechanical,physical,and chemical bonding are ***,the interfacial mechanical properties and their influence on the overall properties are ***,the paper addresses diverse interface modification methods including matrix alloying and reinforcement surface treatment.

关键词： Mg matrix composites interface interfacial strength interfacial modification

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