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The recognizing of ca. 1.95 Ga tectono-thermal eventin Kong-ling nucleus and its significance for the evolution of Yangtze Block, South China

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Chinese Science Bulletin 2001年第4期46卷 326-329页

作者： LING Wenli gao Shan zhang Benren ZHOU Lian XU Qidong Faculty of Earty Sciences China University of Geosciences Wuhan 430074China Department of Geology Northwest UniversityXi’an 710069China

Some 1.95 Ga metamorphism of high-grade Ar-chean rocks in Kongling terrain, continental nucleus of Yangtze Block, South China, are recognized by Sm-Nd dating. This event is further confirmed by the ages of single zircon SHRIMP U-Pb and K-Ar analyses of TTG and (or) paragneisses, and intrusions of potassic-granitic batholith in the region. The coincidence in period between the high-grade metamorphism in the Kongling area and the creation of major basement rocks of its neighborhoods of the Yangtze Block around the Kongling Archean nucleus makes it a favorable explanation for their tectonic connections that, in the whole Yangtze Block there was some tectono-thermal event of ca. 2.0-1.8 Ga, which resulted in the formation of unitive Yangtze basement.

关键词： Kongling high-grade metamorphic terrain tectono-thermal event Paleoproterozoic unitive basement.

Integrated simulation and monitoring to analyze failure mechanism of the anti-dip layered slope with soft and hard rock interbedding

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International Journal of Mining Science and Technology 2023年第9期33卷 1147-1164页

作者： jinduo Li Yuan gao Tianhong Yang Penghai zhang Yong Zhao Wenxue Deng Honglei Liu Feiyue Liu Center for Rock Instability and Seismicity Research School of Resources&Civil EngineeringNortheastern UniversityShenyang 110819China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mine Anhui University of Science&TechnologyHuainan 232001China

The significant difference between the mechanical properties of soft rock and hard rock results in the complexity of the failure mode of the anti-dip layered slope with soft and hard rock *** order to reveal the landslide mechanism,taking the north slope of Fushun West Open-pit Mine as an example,this paper analyzed the failure mechanism of different landslides with monitoring and field surveys,and simulated the evolution of *** study indicated that when the green mudstone(hard rock)of the anti-dip slope contains siltized intercalations(soft rock),the existence of weak layers not only aggravates the toppling deformation of anti-dip layered slope with high dip,but also causes the shear failure of anti-dip layered slope with stable low *** shear failure including subsidence induced sliding and wedge failure mainly exists in the unloading zone of the *** failure depth and failure time were far less than that of toppling *** terms of the development characteristics of deformation,toppling deformation has the long-term and progressive characteristics,but shear failure deformation has the abrupt and transient *** study has deepened the understanding of such slope landslide mechanism,and can provide reference for similar engineering.

关键词： Anti-dip layered slope Soft and hard rock interbedding Toppling failure Wedge failure Fushun West Open-pit Mine

Effect of TiO_(2) addition on microstructures and properties of Mgo-Cao refractory aggregates

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Journal of Iron and Steel Research International 2024年第6期31卷 1547-1554页

作者： Shuai zhang jing-ran Wang Yuan-gao Li Feng-you Li Wen Yan Hui-ying Shi The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Joint International Research Laboratory of Refractories and Metallurgy Wuhan 430081HubeiChina Shanxi Luweibao Taigang Refractory Co. Ltd.Taiyuan 030003ShanxiChina

MgO-CaO(40 wt.%CaO)refractory aggregates were prepared using the calcined dolomite and light-burned magnesia fine powder as raw materials and TiO_(2) as *** effect of TiO_(2) on their phase composition,microstructures and properties was investigated by X-ray diffraction and scanning electron *** properties such as bulk density,apparent porosity,relative aggregate tube strength and hydration resistance were also *** results showed that the CaTiO_(3) generated by the reaction between CaO and TiO_(2) was distributed around the CaO grain boundaries and intermittently distributed with MgO,which formed an isolation layer around CaO and greatly improved the hydration ***,the introduction of TiO_(2) promoted sintering and increased the grain size,further improving the strengths and hydration resistance of the *** addition,the most significant enhancement in the hydration resistance and strengths of the samples was achieved when 1.0-2.0 wt.%TiO_(2) was *** this case,the relative strength of aggregate increased from 33.3% to 37.3%-43.1%,and the mass gain after the hydration test decreased from 3.13% to 1.26%-1.45%.

关键词： MgO-CaO refractory aggregate TiO_(2)addition Phase composition Microstructure Hydration resistance

Achieving exceptional activity and durability toward oxygen reduction based on a cobalt-free perovskite for solid oxide fuel cells

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Journal of Energy Chemistry 2021年第11期30卷 653-659,I0016页

作者： Feifei Dong Zhenghui gao Bingkai zhang Lu Li Ziqi Kong Zilin Ma Meng Ni Zhan Lin Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006GuangdongChina Building Energy Research Group Department of Building and Real EstateThe Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077China

In response to the shortcomings of cobalt-rich cathodes, iron-based perovskite oxides appear as promising alternatives for solid oxide fuel cells (SOFCs). However, their inferior electrochemical performance at reduced temperatures (<700 ℃) becomes a major bottleneck for future progress. Here, a novel cobalt-free perovskite Ba_(0.75)Sr_(0.25)Fe_(0.875)Ga_(0.125)O_(3−δ) (BSFG) is developed as an efficient oxygen reduction electrode for SOFCs, featuring cubic-symmetry structure, large oxygen vacancy concentration and fast oxygen transport. Benefiting from these merits, cells incorporated with BSFG achieve exceptionally high electrochemical performance, as evidenced by a low polarization area-specific resistance of 0.074 Ω cm^(2) and a high peak power density of 1145 mW cm^(−2) at 600 ℃. Meanwhile, a robust short-term performance stability of BSFG cathode can be ascribed to the stable crystalline structure and favorable thermal expansion behavior. First-principles computations are also conducted to understanding the superior activity and durability toward oxygen reduction reaction. These pave the way for rationally developing highly active and robust cobalt-free perovskite-type cathode materials for reduced-temperature SOFCs.

关键词： Solid oxide fuel cell Cathode Perovskite Oxygen reduction reaction Cobalt-free

Prognostic effect of excessive chemotherapy cycles for stage Ⅱ and Ⅲ gastric cancer patients after D2 + gastrectomy

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World Journal of Gastrointestinal Surgery 2023年第1期15卷 32-48页

作者： Yi-Fan Li Wen-Bing zhang Yu-Ye gao Department of General Surgery Shanxi Province Cancer HospitalTaiyuan 030013Shanxi ProvinceChina Endoscopy Center Shanxi Province Cancer HospitalTaiyuan 030013Shanxi ProvinceChina Department of Gastrointestinal Surgery Peking University Cancer Hospital and InstituteBeijing 00010China

BACKGROUND According to relevant investigation and analysis,there are few research studies on the effect of excessive chemotherapy cycles after D2 gastrectomy on the survival of patients with gastric *** To determine whether excessive chemotherapy cycles provide extra survival benefits,reduce recurrence rate,and improve survival rate in patients with stage Ⅱ or Ⅲ gastric *** We analyzed and summarized 412 patients with stage Ⅱ gastric cancer and 902 patients with stage Ⅲ gastric cancer who received D2 gastrectomy plus adjuvant chemotherapy or neoadjuvant *** and comparison at a ratio of 1:1 is aimed at reducing realistic baseline differences(n=97 in each group of stage Ⅱ,n=242 in each group of stage Ⅲ).Progression-free survival,overall survival and recurrence were the main outcome *** When the propensity score was matched,the baseline features of stage Ⅱ and Ⅲ gastric cancer patients were similar between the two *** a series of investigations,Kaplan-Meier found that the progression-free survival and overall survival of stage Ⅱ and Ⅲ gastric cancer patients were consistent between the two *** local metastasis rate(P=0.002),total recurrence rate(P<0.001)and distant metastasis rate(P=0.001)in the≥9 cycle group of stage Ⅲ gastric cancer were statistically lower than those in the<9 cycle *** interaction analysis by Cox proportional hazard regression model showed that intestinal type,proximal gastrectomy,and≥6 cm maximum diameter of tumor had a higher risk of total mortality in the<9 cycles *** Overall,≥9 chemotherapy cycles is not recommended for patients with stage Ⅱ and stage Ⅲ gastric cancer because it has an insignificant role in the prognosis of gastric ***,for patients with stage Ⅲ gastric cancer,≥9 cycles of chemotherapy was shown to significantly decrease recurrence.

关键词： Gastric cancer Propensity score matching Chemotherapy cycles Overall survival Progressionfree survival Recurrence

HPLC and GC methods development for the analysis of key intermediate for synthesis of dicamba

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Chinese Journal of Chemical Engineering 2021年第5期34卷 112-117页

作者： Zhenming zhang He Zhao Xiaohui Wang Weiming Ni Fengsheng gao Jianrong Wang Minjin Liu Yongli Li Key Laboratory of Power Station Energy Transfer Conversion and System Ministry of EducationNorth China Electric Power UniversityBeijing 102206China Jiangsu Changqing Agrochemical Co. Ltd.Yangzhou 225200China Jiangsu Changqing Agrochemical Nantong Co. Ltd.Nantong 226000China

The microreactor based hydroxylation process of 1,2,4-trichlorobezene for producing 2,5-dichlorphenol,the key intermediate of dicamba,is energy efficient and cost *** the 2,5-dicholorphneol is present in a mixed state after *** reaction mixture contained the main by-product 2,4-dichlorophneol,low-content by-product 3,4-dichlorophneol,and other *** difficulty in separation and analysis limits the application of this process *** current work aimed at establishing effective analysis methods by gas chromatography(GC)and high performance liquid chromatography(HPLC).The GC method was not able to separate 2,5-dichlorophenol and 2,4-dichlorophenol completely,but the developed HPLC method worked *** linear correlation coefficients of 2,5-dichlorophenol and 2,4-dichlorophenol were both higher than 0.999,and the average recovery was 100.33% for 2,5-dichlorophenol and 100.13% for 2,4-dichlorophenol,*** relative standard deviations from precision tests were both less than 1%.The contents of 2,5-dichlorophenol and 2,4-dichlorophenol were determined with external standard *** HPLC method has the advantages of simple operation,good separation efficiency,high accuracy and precision,and was successfully applied for both qualitative and quantitative analysis of 2,5-dichlorophenol and 2,4-dichlorophenol of the sample solution.

关键词： 2 5-dichlorophenol 2 4-dichlorophenol Chromatography Separation Chemical analysis

Hollow hydrangea-like nitrogen-doped NiO/Ni/carbon composites as lightweight and highly efficient electromagnetic wave absorbers

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Nano Research 2022年第8期15卷 6831-6840页

作者： jin Liang Chunwei Li Xin Cao Yuxiang Wang Zongcheng Li Benzheng gao Zeyou Tong Bin Wang Shuchen Wan Jie Kong MOE Key Laboratory of Materials Physics and Chemistry in Extraordinary Conditions Shaanxi Key Laboratory of Macromolecular Science and TechnologySchool of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China China Academy of Launch Vehicle Technology Beijing 100076China Minmetals exploration&development CO.LTD Beijing 100010China

Hierarchical hollow-structured magnetic–dielectric materials are considered to be promising and competitive functional absorbers for microwave absorption(MA).Herein,a hierarchical hollow hydrangea multicomponent metal oxides/metal-carbon was designed and successfully produced via a facile self-assembly method and calcination *** magnetic NiO and Ni nanoparticles were suspended within the hollow hydrangea-like nitrogen-doped carbon matrix(HH N-NiO/Ni/C),constructing a unique hierarchical hollow structured multicomponent magnetic–dielectric MA *** annealing temperature and oxidation time were carefully regulated to investigate the complex permittivity and *** N-NiO/Ni/C delivers exceptional MA properties with maximum reflection loss of–45.8 dB at 1.7 mm thickness and displays a wide effective absorption frequency range of 5.6 *** superior MA performance can be attributed to the following aspects:(1)The hierarchical hollow multicomponent structure offers plentiful of heterojunction interfaces triggering interfacial polarization;(2)nitrogen doped-carbon(N-C)facilitates the conductive loss by the unique electron migration path in the graphitized C and NiO/Ni;(3)magnetic NiO/Ni nanoparticles homogeneously dispersed within N-C form extensive C skeleton and strengthen the magnetic response ability;(4)hierarchical hollow wrinkled structures possess a large interspace and heterogeneous interface improving polarization loss and enhancing multireflection process and the unique structure satisfies magnetic and dielectric loss simultaneously resulting from synergistic effects of different components within the composites.

关键词： hierarchical magnetic-dielectric composites hollow hydrangea-like structure impedance matching nitrogen doped NiO/Ni/C microwave absorption

MOF-derived spherical Ni_(x)S_(y)/carbon with B-doping enabling high supercapacitive performance

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Journal of Materials Science & Technology 2023年第22期153卷 219-227页

作者： jingjing Hu Yan Shi Li Sun Feng Xie Kaiyue gao Yaru Qu Hankun Tan Yihe zhang Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China

This work uses a simple Ni-metal organic framework(Ni-MOF)to generate a uniform metal-containing carbon hybrid structure of Ni/C by in-situ ***,after NaBH_(4) treatment and hydrothermal vul-canization of Ni/C,multiphase B-doped Ni_(x)S_(y) nanoparticles can be obtained and uniformly anchored in the carbon skeleton,forming a highly porous flower-shaped B-Ni_(x)S_(y)/C *** positive role of B doping was theoretically confirmed by Density Function Theory(DFT)*** MOF-derived car-bon framework has porous,conductive,and continuous features beneficial for fast charge *** are also multiple Ni-sulfide phases in B-Ni_(x)S_(y)/C,dominated by hexagonal NiS,hexagonal Ni 2 S 3,and cu-bic Ni_(3)S_(4),which give rich valance state and are expected to bring active electrochemical *** addition,the boronation process by the reducing agent of NaBH_(4) is also proved beneficial to bring high capacitance,possibly due to the incorporation of more active sites by ***,the B-Ni_(x)S_(y)/C compos-ite electrode delivers a high specific capacity of 1250.4 C g^(-1) at 1 A g^(-1) and excellent rate *** B-Ni_(x)S_(y)/C-based asymmetric supercapacitor also shows promising prospects for future energy stor-age devices,delivering high cyclability with capacitance retention of 87.6%after 7000 *** work proves the efficiency of MOF-derived carbon framework and B-doping in improving metal sulfide’s electrochemical performances.

关键词： B-Ni_(x)S_(y)/C Carbon skeleton Flower-shaped Hybrid capacitor Asymmetric supercapacitor

Construction of a Genome-Wide Mutant Library in Rice Using CRISPR/Cas9

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Molecular Plant 2017年第9期10卷 1238-1241页

作者： Meng, Xiangbing Yu, Hong zhang, Yi Zhuang, Fengfeng Song, Xiaoguang gao, Songsong gao, Caixia Li, Jiayang Chinese Acad Sci Inst Genet & Dev Biol State Key Lab Plant Genom Beijing 100101 Peoples R China Chinese Acad Sci Inst Genet & Dev Biol Natl Ctr Plant Gene Res Beijing 100101 Peoples R China Chinese Acad Sci Inst Genet & Dev Biol State Key Lab Plant Cell & Chromosome Engn Beijing 100101 Peoples R China Beijing ViewSolid Biotechnol Beijing 102206 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

Dear Editor Rice （Oryza sativa L.） is one of the world＇s most important staple crops and a powerful model system for studying monocot spe- cies because of its relatively small genome, rich genomic re- sources, and a highly efficient transformation system. With the completion of rice genome sequencing, the challenge of the post-genomic era is to systematically analyze the functions of all rice genes. Gene knockout is a frequently used and effective strategy for achieving this goal. Thus, generation of large-scale mutants at the whole-genome level is of great value for both func- tional genomics and genetic improvement of rice. Traditionally,

关键词： Construction of a Genome-Wide Mutant Library Rice Using CRISPR