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Chinese Chemical Letters 2016年第4期27卷 518-522页

作者： Yan-Kai Lia jun-Ji Zhang zi-jun bian You-Xin Fu Fei Liu Chen-Hui Wang Xiang Ma jun Hu Hong-Lai Liu Key Laboratory for Advanced Materials and Department of Chemistry East China University of Science and Technology Key Laboratory for Advanced Materials and Institute of Fine Chemicals East China University of Science and Technology Xi’an Thermal Power Research Institute Co. Ltd. (Suzhou Branch)

Infinite coordination polymers are recognized as excellent platform for *** motifs,which are one of the most attractive functional moieties,were incorporated into an infinite coordination polymer,to deliver a‘‘smart’’porous material that can response to external *** obtained dithienylethene-based infinite coordination polymers（named Cu-DTEDBA）share the advantages of both infinite coordination polymers（porosity and stability）and dithienylethene motifs（photochromism）.The physical and chemical properties of Cu-DTEDBA were characterized by FTIR,TEM,SEM,XRD,TGA,UV–vis,EDX and ***,the combination of dithienylethene and infinite coordination polymers gives rise to a synergistic effect,which induces functional behaviors of ammonia sensor *** open and closed forms of Cu-DTEDBA exhibit distinct colorimetric change upon exposure to gaseous ammonia,which is not observed in dithienylethene free molecules.

关键词： Dithienylethene Photochromism Infinite coordination polymers Synergistic effect Gaseous ammonia probe

A Series of Exact Solutions for a New （2＋1）-Dimensional Calogero KdV Equation

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Communications in Theoretical Physics 2005年第5X期44卷 815-820页

作者： bian Xue-jun Department of Mathematics Hulunbeier Educational College Hulunbeier 021000 China

An algebraic method is proposed to solve a new (2+1)-dimensional Calogero KdV equation and explicitly construct a series of exact solutions including rational solutions, triangular solutions, exponential solution, lin... 详细信息

关键词： (2+1)-dimensional Calogero KdV equation exact solutions algebraic method computerized symbolic computation

Discovery of a Novel 5-HT_(2A) Inhibitor by Pharmacophore-based Virtual Screening

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Chemical Research in Chinese Universities 2011年第4期27卷 655-660页

作者： XIONG zi-jun DU Peng LI bian XU Li-li ZHEN Xue-chu FU Wei Key Laboratory of Smart Drug Delivery Ministry of Education ＆ PLA Department of Medicinal Chemistry School of Pharmacy Fudan University Shanghai 201203 P. R. China State Key Laboratory for Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai 201203 P. R. China Department of Pharmacology College of Pharmacy Soochow University Suzhou 215123 P. R. China

The serotonin 2A（5-HT2A） receptor has been implicated in several neurological conditions and potent 5-HT2A antagonists have therapeutic effects in the treatment of schizo phrenia and *** this study,a potent novel 5-HT2A inhibitor 05245768 with a Ki value of （593.89±34.10） nmol/L was discovered by integrating a set of computational approaches and experiments（protein structure prediction,pharmacophore-based virtual screening,automated molecular docking and pharmacological bioassay）.The 5-HT2A receptor showed a negatively charged bin-ding *** binding mode of compound 05245768 with 5-HT2A was obtained by GOLD docking procedure,which revealed the conserved interaction between protonated nitrogen in compound 05245768 and carboxylate group of D3.32 at the active site of 5-HT2A.

关键词： Pharmacophore model Serotonin 2A receptor Database search Virtual screening Molecular docking

Effects of specific surface area of metallic nickel particles on carbon deposition kinetics

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International Journal of Minerals,Metallurgy and Materials 2018年第2期25卷 226-235页

作者： Zhi-yuan Chen Liu-zhen bian zi-you Yu Li-jun Wang Fu-shen Li Kuo-Chih Chou Collaborative Innovation Center of Steel Technology University of Science and Technology Beijing Department of Materials Science and Engineering Delft University of Technology State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Materials Science and Engineering University of Science and Technology Beijing

Carbon deposition on nickel powders in methane involves three stages in different reaction temperature ranges. Temperature programing oxidation test and Raman spectrum results indicated the formation of complex and ordered carbon structures at high deposition temperatures. The values of I（D）/I（G） of the deposited carbon reached 1.86, 1.30, and 1.22 in the first, second, and third stages, respectively. The structure of carbon in the second stage was similar to that in the third stage. Carbon deposited in the first stage rarely contained homogeneous pyrolytic deposit layers. A kinetic model was developed to analyze the carbon deposition behavior in the first stage. The rate-determining step of the first stage is supposed to be interfacial reaction. Based on the investigation of carbon deposition kinetics on nickel powders from different resources, carbon deposition rate is suggested to have a linear relation with the square of specific surface area of nickel particles.

关键词： metallic nickel carbon deposition coking specific surface area methane kinetics

Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

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Science China Chemistry 2025年第01期 288-296页

作者： Shuai Liu Wen-Qiang Xu Ying-Tong Di Man-Cheng Tang Ding-Kang Chen Ming-Ming Cao Yao-Wen Chang Hong-Yu Tang Chun-Mao Yuan jun-Bo Yang Zhi-Li Zuo Han Guo zi-Fei Xu Ying Zeng Yun-Dong Wu Xiao-Jiang Hao Key Laboratory of Phytochemistry and Natural Medicines (Chinese Academy of Sciences) Kunming Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen Bay Laboratory State Key Laboratory of Microbial Metabolism School of Life Sciences & Biotechnology Shanghai Jiao Tong University State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany Chinese Academy of Sciences Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany Chinese Academy of Sciences Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical Sciences

In the intricate process of natural product biosynthesis, a metabolon can enhance metabolic flux by associating sequential enzymes. A fungal metabolon, comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G, is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide B. Using notoamide E as a substance, Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation, followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium unit. Subsequently,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol rearrangement. This provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

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基于游记攻略的长江经济带旅游流网络结构特征及影响因素

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西华师范大学学报（自然科学版） 2025年第1期46卷 72-78页

作者：刘大均陈君子陈云成都大学旅游与文化产业学院成都610106

宏观把握长江经济带旅游流的网络结构,对于长江经济带旅游空间格局优化、旅游业高质量发展具有重要意义。基于游记攻略大数据挖掘,运用复杂网络模型、地理探测器等方法,分析长江经济带旅游流的网络结构特征以及影响因素。研究表明:长江... 详细信息

宏观把握长江经济带旅游流的网络结构,对于长江经济带旅游空间格局优化、旅游业高质量发展具有重要意义。基于游记攻略大数据挖掘,运用复杂网络模型、地理探测器等方法,分析长江经济带旅游流的网络结构特征以及影响因素。研究表明:长江经济带旅游流网络具有明显幂律分布规律,多极化层级结构突出,上海市是核心节点,成都市、南京市、武汉市、重庆市、长沙市、杭州市、昆明市、苏州市、南昌市、合肥市是次核心节点;长江经济带旅游流网络不均衡性强,小世界性特征显著,形成了长三角、长江中游、川渝、云南、贵州5个社团。旅游关注度、旅游产业基础、旅游资源禀赋是长江经济带旅游流网络结构的主要影响因素,其中旅游关注度是首要因素。最后,提出强化核心节点辐射带动、着力完善区域合作机制、加大旅游宣传营销力度等建议。

关键词：旅游旅游流大数据长江经济带

Topography,structure,and formation kinetic mechanism of carbon deposited onto nickel in the temperature range from 400 to 850°C

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International Journal of Minerals,Metallurgy and Materials 2017年第5期24卷 574-583页

作者： Zhi-yuan Chen Liu-zhen bian Li-jun Wang zi-you Yu Hai-lei Zhao Fu-shen Li Kuo-chih Chou State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Collaborative Innovation Center of Steel Technology University of Science and Technology Beijing School of Materials Science and Engineering University of Science and Technology Beijing

The carbon deposition behavior on nickel particles was observed within the temperature range from 400 to 800°C in a pure methane atmosphere. The topography, properties, and molecular structure of the deposited carbon were investigated using field-emission scanning electron microscopy (FESEM), temperature-programmed oxidation (TPO) technology, X-ray diffraction (XRD), and Raman spectroscopy. The deposited carbon is present in the form of a film at 400-450°C, as fibers at 500-600°C, and as particles at 650-800°C. In addition, the structure of the deposited carbon becomes more ordered at higher temperatures because both the TPO peak temperature of deposited carbon and the Raman shift of the G band increase with the increase in experimental temperature, whereas the intensity ratio between the D bands and the G band decreases. An interesting observation is that the carbon deposition rate is suppressed in the medium-temperature range (M-T range) and the corresponding kinetic mechanism changes. Correspondingly, the FWHM of the G and D1 bands in the Raman spectrum reaches a maximum and the intensities of the D2, D3, and D4 bands decrease to low limits in the M-T range. These results indicate that carbon structure parameters exhibit two different tendencies with respect to varying temperature. Both of the two group parameters change dramatically as a peak function with increasing reaction temperature within the M-T range.

关键词： nickel carbon deposition kinetic mechanisms solid oxide fuel cells

The asymptotic relation between the first crossing point and the last exit time of Gaussian order statistics sequences

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Applied Mathematics(A Journal of Chinese Universities) 2023年第4期38卷 545-561页

作者： NING zi-jun TAN Zhong-quan College of Data Science Jiaxing UniversityJiaxing 314001China

In this paper,we study the asymptotic relation between the first crossing point and the last exit time for Gaussian order statistics which are generated by stationary weakly and strongly dependent Gaussian *** is shown that the first crossing point and the last exit time are asymptotically independent and dependent for weakly and strongly dependent cases,*** asymptotic relations between the first crossing point and the last exit time for stationary weakly and strongly dependent Gaussian sequences are also obtained.

关键词： rst crossing point last exit time stationary Gaussian sequences Gaussian order statistic se-quences

Effect of cholesterol metabolism on hepatolithiasis

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World Journal of Gastroenterology 2025年第1期31卷 157-162页

作者： Lin Zheng zi-Yu Ye jun-Ji Ma Department of Gastroenterology The Second Hospital of Hebei Medical UniversityHebei Key Laboratory of GastroenterologyHebei Institute of GastroenterologyHebei Clinical Research Center for Digestive DiseasesNo.215 Heping West RoadShijiazhuang 050000Hebei ProvinceChina

Surgical intervention is currently the primary treatment for hepatolithiasis;how-ever,some patients still experience residual stones and high recurrence rates after *** metabolism seems to play an important role in hepatoli-thiasis pathogenesis.A high cholesterol diet is one of the significant reasons for the increasing incidence of ***,regular diet and appropriate medical intervention are crucial measures to prevent hepatolithiasis and reduce recurrence rate after *** dietary cholesterol and drugs that increase cholesterol stone solubility are key therapeutic approaches in treating *** article discusses the cholesterol metabolic pathways related to the pathogenesis of hepatolithiasis,as well as food intake and targeted therapeutic drugs.

关键词： Hepatolithiasis Cholesterol metabolism High-fat diet 3-hydroxy-3-methylglutaryl-coenzyme A reductase Interlobular bile duct

Reduced Spring Precipitation Bias and Associated Physical Causes over South China in FGOALS-f3 Climate Models:Experiments with the Horizontal Resolutions

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Journal of Meteorological Research 2024年第4期38卷 784-804页

作者： Peng zi Yimin LIU Jiandong LI Ruowen YANG bian HE Qing BAO Department of Atmospheric Science Yunnan UniversityKunming 650504 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029

Considerable spring precipitation occurs over South China(SC),a region that is adjacent to large-scale Asian topography and *** reasonable simulation is crucial for improving regional climate *** study investigates spring precipitation biases over SC and their possible causes in atmosphere-only and coupled Flexible Global Ocean–Atmosphere–Land System finite-volume version 3(FGOALS-f3) models with different horizontal *** performance of spring precipitation simulation over SC varies across different FGOALS-f3 model versions,with the best reproducibility in the high-resolution coupled model(25 km).In the low-resolution atmosphere-only model(100–125 km),the precipitation dry bias over SC is closely linked to overestimated surface sensible forcing over the eastern Tibetan Plateau(TP),which weakens the subtropical anticyclone over the western Pacific(SAWP) through regional circulation *** contrast,the high-resolution atmosphere-only model further amplifies surface thermal forcing in the Asian continents,causing intensified land–sea thermal contrast between the Southeast Asian continents and western Pacific,enhanced southerly winds and SAWP,and increased water vapor transport into ***,the reduced middle–high level cold bias over 10°–30°N in the high-resolution atmosphere-only model intensifies the East Asian westerly jet and ascent over SC,leading to enhanced spring precipitation *** high-resolution coupled model simulation not only reduces sea surface cold bias over the Bay of Bengal,thus intensifying the Indian–Burma trough and strengthening low-level water vapor transport into SC,but also enhances ascent over *** a result,the high-resolution coupled model better reproduces the magnitude and pattern of spring precipitation over SC than its atmosphere-only *** with low-resolution models,the domain-mean spring precipitation dry bias decreases by 11.2% over SC in the high-resolution atmosphere-only mod

关键词： South China spring precipitation high resolution Flexible Global Ocean–Atmosphere–Land System finite-volume version 3(FGOALS-f3)models simulation