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TiO2/g-C3N4 heterojunctions： In situ fabrication mechanism and enhanced photocatalytic activity

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Frontiers of Materials Science 2016年第3期10卷 310-319页

作者： li-Cheng WU Hang ZHAO li-guo jin Huan-Yan XU School of Materials Science and Engineering Harbin University of Science and Technology Harbin 150040 China

In situ fabrication of TiO21g-C3N4 （TCN） heterojunctions was achieved by a modified sol-gel method. TG analysis was employed to determine the content of Ti02 in TCN composites. XRD, FTIR, TEM and HRTEM were used to analyze the phase composition, functional groups, morphology and microstructure of as-obtained pro- ducts, respectively. Based on the measurement of surface Zeta potential of g-C3N4, a possible mechanism on in situ fabrication of TCN heterojunctions was concluded. The control experiments indicated that TCN heterojunctlons exhibited better photocatalytic performance than either Ti02 or g-C3N4, suggesting that the enchanced photocatalytic activity could be realized by TCN heterojunctionso Then, the evaluation of parameters affecting the photocatalytic performance of TCN heterojunctions was investigated. Even after five cycles, TCN heterojunctions still maintained high photocatalytic activity, exhibiting the good photocatalytic stability. UV-vis absorption spectra showed that almost all MB molecules were decomposed in the photocatalytic process. Finally, the possible mechanism on enhanced photocatalytic performance of TCN heterojunctions was discussed.

关键词： TiO2 g-C3N4 heterojuncUons photocatalytic mechanism

Diversity, Structure, and Marker-Trait Association Analysis of the Maize Recombinant Inbred line Population

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Agricultural Sciences in China 2011年第7期10卷 975-986页

作者： CHEN jing-tang HU li-zong ZHU li-ying guo jin-jie ZHAO Yong-feng HUANG Ya-qun College of Agronomy Agricultural University of Hebei/Hebei Sub-Center of Chinese National Maize Improvement Center/Northern China Key Laboratory for Crop Germplasm Resources Ministry of Education Baoding 007100 P.R.China

Association mapping has emerged as a new tool to elucidate complex quantitative trait loci in maize, but there are few reports about systematic association analysis for the specific SSR markers with agronomic traits of interest in China. We investigated the morphological and genetic diversity and population structure for 76 maize recombinant inbred lines, and then association analysis were further performed between 48 simple sequence repeat loci and 17 morphological traits, consisting of nine ear-related traits and eight other traits. The 48 SSR markers were screened out and further classified into two groups including a group of loci in regions harboring reported quantitative trait loci that affect ear shape and a group of markers distributing on the whole genome randomly. The result indicated that the population of recombinant inbred lines was structured, showing five subpopulations. Our association results revealed that there were 82, 59, and 40 significant associations detected by K-test, logistic regression, and both analysis, respectively. When the 17 traits were considered separately, the significant associations between Q-SSRs and E-traits were raised to 27.8%, whereas the other groups of combinations ranged between 2.3 and 6.3%. As the proportion of significant associations is higher among the Q-SSR subset of markers and the subset of traits related to ear shape than those for all of the other combinations, we conclude that this approach is valid for establishing true positive marker-trait relationships. Our results also demonstrated that association mapping could complement and enhance previous QTL information for marker-assisted selection.

关键词： maize ear shape association mapping recombinant inbred lines

Thermal state of soils in the active layer and underlain permafrost at the kilometer post 304 site along the China-Russia Crude Oil Pipeline

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Journal of Mountain Science 2016年第11期13卷 1984-1994页

作者： WANG Yong-ping li guo-yu jin Hui-jun LU Lan-zhi HE Rui-xia ZHANG Peng State Key Laboratory of Frozen Soils Engineering Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of SciencesLanzhou 730000China Beifang University of Nationalities Yinchuan 750000China Nanjing Tech University Nanjing 210009China

On-site monitoring is very important for understanding formation mechanisms of frost hazards frequently occurring in pipeline foundation soils and for designing and deploying according mitigative measures in permafrost *** thaw subsidence of ground surfaces along the ChinaRussia Crude Oil Pipeline(CRCOP) from Mo'he to Daqing,Heilongjiang Province,Northeast China have been observed at some segments underlain by ice-rich warm(>1.0°C) permafrost since the official operation in January *** monitoring results of the thermal states of foundation soils at the kilometer post(KP) 304 site along the CRCOP are presented in this *** results indicate that during the period from 2012 to 2014,shallow soils(at the depths from0.8 to 4.0 m from ground surface) has warmed by approximately 1.0°C in the lateral range of 1.2 to 2.1 maway from the pipeline axis,and deeper permafrost(such as at the depth of 15 m,or the depth of zero annual amplitude of ground temperatures) by 0.08°C per year 4 m away from the pipe axis,and 0.07°C per year 5 m away from the pipeline *** results indicate an all-season talik has developed around and along the *** thaw bulb,with a faster lateral expansion(compared with the vertical growth),enlarges in summer and shrinks in *** research will provide important references and bases for evaluating thermal influences of warm pipeline on permafrost and for design,construction,operation and maintenance of pipelines in permafrost regions.

关键词： China-Russia Crude Oil Pipeline Permafrost Thermal regime Talik formation Thaw subsidence

Effects of Cyclic Electron Flow Inhibitor(Antimycin A)on Photosystem Photoinhibition of Sweet Pepper Leaves upon Exposure to Chilling Stress Under Low Irradiance

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Agricultural Sciences in China 2006年第7期5卷 506-511页

作者： li Xin-guo ZHAO jin-ping XU Ping-li MENG jing-jing HE Qi-wei High-Tech Center Shandong Academy of Agricultural Sciences Ji＇nan 250100 P.R.China

In chloroplast, there were two pathways involved in the cyclic electron flow around photosystem 1 （PS 1）. One was the NADH dehydrogenase （NDH）-dependent flow and the other was the ferredoxin quinone reductase-dependent flow. It was proposed that the NDH-dependent cyclic electron flow around PSI was related to the xanthophyll cycle-dependent non-photochemical quenching （NPQ） at chilling temperature under low irradiance （CL）. The function of the chloroplastic cyclic electron flow around PS 1 was examined by comparing sweet pepper （Capsicum annuum L.） control with its antimycin A （AA）-fed leaves upon exposure to CL stress. During CL stress, the maximum photochemical efficiency of PS2 （Fv/Fm） decreased markedly in both controls and AA-fed leaves, and P700＋ was also lower in AA-fed leaves than in controls. These results implied that cyclic electron flow around PS 1 functioned to protect the photosynthetic apparatus from CL stress. Under such stress, NPQ and PS2-driven electron transport rate were different between AA-fed leaves and controls. The lower NPQ in AA-fed leaves might be related to an inefficient proton gradient across thylakoid membranes （ApH） because of inhibiting cyclic electron flow around PS 1 under CL stress.

关键词： sweet pepper chilling stress cyclic electron flow non-photochemical quenching the xanthophyll cycle

Microwave excited hyperthermy and catalysis of heterostructured Au/Cu–BTA for effective bacteria killing by accelerating charge separation

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Rare Metals 2024年第10期43卷 5186-5201页

作者： Wen-jing Zhang li-guo jin Shui-lin Wu Chao-Feng Wang Yu-Feng Zheng Zhao-Yang li Zhen-Duo Cui Hui Jiang Sheng-li Zhu Xiang-Mei liu School of Materials Science and Engineering the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaTianjin UniversityTianjin 300072China Biomedical Materials Engineering Research Center Hubei Key Laboratory of Polymer MaterialsMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhan 430062China School of Materials Science and Engineering Peking UniversityBeijing 100871China School of Health Science and Biomedical Engineering Hebei University of TechnologyTianjin 300401China

Deep tissue infections caused by pathogenic bacteria seriously threat the lives of *** this study a smart heterostructured Au/Cu-BTA(BTA=1,2,4,5-benzenetetramine)with microwave(MW)response is synthesized via NaBH_(4)reduction of HAuCl_(4)on the ***/Cu-BTA exhibits excellent hyperthermy and dynamics under MW *** MW thermal mechanism of Au/Cu-BTA is attributed to the excellen dielectric loss and polarization of the heterogeneous ***,the surface energy levels of the Cu-BTA interface alleviate the difficulty of electron hopping through multistage ***,MW can excite Cu-BTA to produce free ***,Au nanoparticles rapidly increase electron transfer and inhibit electron-hole ***,the yields of reactive oxygen species can be enhanced for MW dynamic therapy Consequently,under 10 min of MW irradiation,Au/Cu-BTA killed 99.998%±0.001% of Gram-positive Staphylococcus aureus,99.966%±0.014% of methicillin-resistant Staphylococcus aureus,and 96.871%±0.831% of Gram-negative Pseudomonas *** effective MW bacteria-killing strategy designed in this study shows significant potential for application in the MW-responsive treatment of deep tissue infections without antibiotics.

关键词： Microwave therapy Antibacterial Antiinfection

Comparative studies on Fenton-like reactions catalyzed by Fe_(3)O_(4) loaded inside and outside halloysite nanotubes for the removal of organic pollutants

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Frontiers of Materials Science 2024年第1期18卷 15-28页

作者： Yang li Jia-Qi Zhou Huan-Yan Xu li-Min Dong Mao-Chang Cao lian-Wei Shan li-guo jin Xiu-Lan He Shu-Yan Qi Heilongjiang Provincial Key Laboratory of CO_(2) Resource Utilization and Energy Catalytic Materials School of Materials Science and Chemical EngineeringHarbin University of Science and TechnologyHarbin 150040China

In this work,Fe_(3)O_(4) nanoparticles(NPs)loaded inside and outside halloysite nanotubes(HNTs)were prepared and developed as the heterogeneous Fenton-like catalysts for the removal of representative organic *** results indicated that the samples with Fe_(3)O_(4) NPs loaded outside the HNTs lumen(Fe_(3)O_(4)/HNTs)and inside the HNTs lumen(Fe_(3)O_(4)@HNTs)were successfully *** samples had typical magnetic hysteresis loops,while Fe_(3)O_(4)@HNTs exhibited higher magnetization *** comparative experiments showed that Fe_(3)O_(4)@HNTs had better Fenton-like catalytic ability than that of Fe_(3)O_(4)/HNTs in the degradation of various organic *** Rhodamine B(RhB)as an example,the adsorption thermodynamics and kinetics of RhB onto Fe_(3)O_(4)/HNTs and Fe_(3)O_(4)@HNTs were also *** comparative results demonstrated that the adsorption ability of Fe_(3)O_(4)/HNTs was better than that of Fe_(3)O_(4)@***,the dissolved concentration of Fe^(2+)and production amount of hydroxyl radical(·OH)in the Fe_(3)O_(4)@HNTs-H_(2)O_(2) system were significantly higher than those in the Fe_(3)O_(4)/HNTs-H_(2)O_(2) *** on aforementioned comparison,the nano-confinement effect in the Fe_(3)O_(4)@HNTs-H_(2)O_(2) system was *** work provides meaningful guidance for the cheap and convenient design of nanoreactors for Fenton-like applications.

关键词： Fe_(3)O_(4) halloysite nanotube adsorption Fenton-like reaction mechanism

Heterogeneous Fenton-like discoloration of methyl orange using Fe3O4/MWCNTs as catalyst： process optimization by response surface methodology

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Frontiers of Materials Science 2016年第1期10卷 45-55页

作者： Huan-Yan XU Tian-Nuo SHI Hang ZHAO li-guo jin Feng-Chun WANG Chun-Yan WANG Shu-Yan QI School of Materials Science and Engineering Harbin University of Science and Technology Harbin 150040 China

Fe3O4/MWCNTs nanocomposites were prepared by chemical oxidation coprecipitation method and developed as highly efficient heterogeneous Fenton-like catalyst. XRD results revealed that Fe3O4 nanoparticles deposited onto MWCNTs surface remained the inverse spinel crystal structure of cubic Fe3O4 phase. The FTIR characteristic peaks of MWCNTs weakened or disappeared due to the anchor of Fe3O4 nanoparticles and Fe-O peak at 570 cm^-1 was indicative of the formation of Fe3O4. TEM observation revealed that Fe3O4 nanoparticles were tightly anchored by MWCNTs. The Fenton-like catalytic activity of Fe3O4/MWCNTs nanocomposites for the discoloration of methyl orange （MO） was much higher than that of Fe3O4 nanoparticles. The process optimization of this heterogeneous Fenton-like system was implemented by response surface methodology （RSM）. The optimum conditions for MO discoloration were determined to be of 12.3 mmoi/L H2O2 concentration, 2.9 glL catalyst dosage, solution pH 2.7 and 39.3 min reaction time, with the maximum predicted value for MO discoloration ratio of 101.85%. The corresponding experimental value under the identical conditions was obtained as 99.86%, which was very close to the predicted one with the absolute deviation of 1.99%.

关键词： Fe3O4/MWCNTs Fenton-like catalyst azo dye response surface methodology

Differential expression of a novel colorectal cancer differentiation-related gene in colorectal cancer

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World Journal of Gastroenterology 2001年第4期7卷 551-554页

作者： Xing-guo li jin-Dan Song Yun-Qing Wang Key Laboratory of Cell Biology,Ministry of Public Health of China,China Medical University,Shenyang 110001,liaoning Province,China Key Laboratory of Cell Biology Ministry of Health of China China Medical University Shenyang 110001 Liaoning Province China.

AIM: To investigate SBA2 expression in CRC cell lines and surgical specimens of CRC and autologous healthy mucosa. METHODS: Reverse transcription-polymerase chain reaction (RT-PCR) was used for relative quantification of SBA2 mRNA levels in 4 human CRC cell lines with different grades of differentiation and 30 clinical samples. Normalization of the results was achieved by simultaneous amplification of beta-actin as an internal control. RESULTS: In the exponential range of amplification, fairly good linearity demonstrated identical amplification efficiency for SBA2 and beta-actin (82%). Markedly lower levels of SBA2 mRNA were detectable in tumors, as compared with the coupled normal counterparts PP P<0.05). CONCLUSION: SBA2 gene might be a promising novel biomarker of cell differentiation in colorectal cancer and its biological features need further studies.

关键词： Gene Expression Regulation, Neoplastic Cell Differentiation Colorectal Neoplasms DNA, Complementary Humans Molecular Sequence Data Neoplasm Proteins Polymerase Chain Reaction Tumor Cells, Cultured Tumor Markers, Biological

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论民俗习惯之民商法法源地位

山东大学学报（哲学社会科学版） 2011年第6期 76-82页

作者：厉尽国山东大学威海分校法学院威海264209 山东大学哲学与社会发展学院济南250100

从区分法律规范与法律渊源的角度,民俗习惯可以定位为一种民商法法源。因社会变迁以及地域差异而出现法律漏洞时,民俗习惯具有补充强制法以维护正常秩序之功能,这是其作为法源的主要法理依据。民俗习惯作为法源的效力依据,在法有明文规... 详细信息

从区分法律规范与法律渊源的角度,民俗习惯可以定位为一种民商法法源。因社会变迁以及地域差异而出现法律漏洞时,民俗习惯具有补充强制法以维护正常秩序之功能,这是其作为法源的主要法理依据。民俗习惯作为法源的效力依据,在法有明文规定的情况下来自于成文法规则,而当法无明文规定时则通过公序良俗等基本原则得以体现。作为法源的民俗习惯,其形成和有效适用需要具备特定的条件,同时在具体的法律适用中,还必须严格考量其与其他民商事法源的效力位阶。

关键词：民俗习惯民商法法源地位法理依据效力依据