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Template Syntheses and Crystal Structures of Hexaaza Macrocyclic Complexes with C-Methyl Substituents

Chinese Journal of Structural Chemistry 2005年第11期24卷 1259-1263页

作者： ZHANG Bing KOU Hui-Zhong CUI ai-li wang Ru-Ji Department of Chemistry Tsinghua University Beijing 100084 China

Two new macrocyclic complexes with C-methyl substituents on the framework, namely, [CuL]（ClO4）2 （L = 5,12-dimethyl-1,8-dihydroxyethyl-1,3,6,8,10,13-hexaazacyclotetradecane） 1 and [NiL]（ClO4）2 2, have been synthesized and structurally characterized through X-ray diffraction analysis. Also, crystal structure of [CuL^1]（ClO4）2 （L^1 = 1,8-dimethyl- 1,3,6,8, [ 0,13- hexaazacyclotetradecane） 3 has been determined. Crystal data for 1： C14H32C12CuN6O10, Mr = 578.90, monoclinic, P2 1/n, α = 8.3529（11）, b = 10.8105（17）, c = 13.3709（17） ,A, β = 105.189（10）°, V= 1165.2（3） A3, Z = 2, Dc = 1.650 g/cm^3, F（000） = 602, λ（MoKct） = 0.71073 A,μ = 1.229 mm ^-1, R = 0.0474 and wR = 0.0895 for 2771 observed reflections （I 〉 2σ（Ⅰ））. Crystal data for 2： C14H32C12N6NiO10, Mr = 574.07, monoclinic, P2 1/c, a = 8.3636（12）, b = 12.997（2）, c = 10.764（2） A, β = 99.31（2）°, V = 1154.7（3） A^3, Z = 2, DC = 1.651 g/cm^3, F（000） = 600, λ（MoKa） = 0.71073 A,μ = 1. 134 mm^-1, R = 0.0380 and wR = 0.0796 for 2670 observed reflections （i 〉 2σ（Ⅰ））. Crystal data for 3： C 10H26Cl2CuN6O8, Mr = 492.81, monoclinic, P2 1/n, a = 8.4860（17）, b = 8.6320（17）, c = 12.662（3） ,A,β = 103.40（3）°, V = 902.2（3）A^3, Z = 2, Dc = 1.814 g/cm^3, F（000） = 510, λ（MoKa） = 0.71073A, μ = 1.562 mm^-1, R = 0.0505 and wR = 0.1061 for 1967 observed reflections （I〉 2σ（Ⅰ））. Complexes 1 and 2 are isostructural with the metal ions situated at the inversion center/Hydrogen bonds between O atoms of pendant and perchlorate anion give rise to a two-dimensional supramolecular layer. The Cu（Ⅱ） ions of compounds 1 and 3 adopt distorted axially-elongated octahedral coordinate geometry, and the nickel（Ⅱ） ion in complex 2 is four-coordinated with a square-planar configuration.

关键词： synthesis crystal structure macrocycle C-methyl substituent copper nickel synthesis crystal structure macrocycle C-methyl substituent copper nickel

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Estimation of biomass in wheat using random forest regression algorithm and remote sensing data

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The Crop Journal 2016年第3期4卷 212-219页

作者： li'ai wang Xudong Zhou Xinkai Zhu Zhaodi Dong Wenshan Guo Key Laboratory of Crop Genetics and Physiology of Jiangsu Province Yangzhou University Information Engineering College of Yangzhou University

Wheat biomass can be estimated using appropriate spectral vegetation ***,the accuracy of estimation should be further improved for on-farm crop *** studies focused on developing vegetation indices,however limited research exists on modeling *** emerging Random Forest(RF) machine-learning algorithm is regarded as one of the most precise prediction methods for regression *** objectives of this study were to(1) investigate the applicability of the RF regression algorithm for remotely estimating wheat biomass,(2) test the performance of the RF regression model,and(3) compare the performance of the RF algorithm with support vector regression(SVR) and artificial neural network(ANN) machine-learning algorithms for wheat biomass *** HJ-CCD images of wheat from test sites in Jiangsu province were obtained during the jointing,booting,and anthesis stages of *** vegetation indices were calculated based on these ***-situ wheat above-ground dry biomass was measured during the HJ-CCD data *** results showed that the RF model produced more accurate estimates of wheat biomass than the SVR and ANN models at each stage,and its robustness is as good as SVR but better than *** RF algorithm provides a useful exploratory and predictive tool for estimating wheat biomass on a large scale in Southern China.

关键词： Above-ground dry biomass Triticum aestivum Vegetation indices Wheat

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Cardioprotective effect of liposomal prostaglandin E1 on a porcine model of myocardial infarction reperfusion no-reflow

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第8期12卷 638-643页

作者： Jia-hui li Peng YANG ai-li li Yong wang Yuan-nan KE Xian-lun li Department of Cardiology China-Japan Friendship Hospital Beijing 100029 China

Objective： To evaluate whether liposomal prostaglandin E1 （lipo-PGE1） can decrease reperfusion no-reflow in a catheter-based porcine model of acute myocardial infarction （AMI）. Methods： Twenty-two male Chinese mini-swines were randomized into three groups： six in a sham-operation group, and eight each in the control and lipo-PGE1 groups. The distal part of the left anterior descending coronary artery （LAD） in the latter two groups was completely occluded for 2 h, and then reperfused for 3 h. lipo-PGE1 （1 pg/kg） was injected 10 min before LAD occlusion until reperfusion for 1 h in the lipo-PGE1 group. Hemodynamic data and proinflammatory cytokines were examined before AMI, 2 h after occlusion, and 1, 2, and 3 h after reperfusion. Myocardial contrast echocardiography （MCE） and double staining were performed to evaluate the myocardial no-reflow area （NRA）. Results： Left ventricular systolic pressure and end-diastolic pressure significantly improved in the lipo-PGE1 group after reperfusion compared with the control group and also 2 h after AMI （P〈0.05 for both）. MCE and double staining both showed that lipo-PGE1 decreased reperfusion NRA after AMI （P〈0.05, P〈0.01）. lipo-PGE1 decreased serum interleukin-6 （IL-6） and tumor necrosis factor-a （TNF-a） after myocardial infarction reperfusion （P〈0.05 for both）. Conclusions： lipo-PGE1 is cardioprotective in our porcine model of myocardial infarction reperfusion no-reflow, decreasing NRA and attenuating the inflammatory response.

关键词： liposomal prostaglandin E1 (lipo-PGE1) Reperfusion no-reflow Myocardial infarction

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A highly selective electrochemical impedimetric sensor for imidacloprid determination based on WO_(3)/MoS_(2)nanosheets/molecularly imprinted polymer composite

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Rare Metals 2024年第3期43卷 1309-1315页

作者： Long-Hua Ding Ya-Wen wang Qiu-Wen li li-li Zhang ai-Zhu wang Institute for Advanced Interdisciplinary Research School of Chemistry and Chemical EngineeringUniversity of JinanJinan250022China HCA Florida Healthcare Westside/Northwest Hospital Internal Medicine PlantationFL33324USA

In this study,an electrochemical impedimetric sensor was established for imidacloprid(IMI)detection based on WO_(3)/MoS_(2)and molecular imprinted polymer(MIP)*** layer was prepared on electrode surface by electropolymerization of o-phenylenediamine(o-PD)in the presence of IMI template,which ensured the specific rec-ognization toward IMI.

关键词： electrochemical polymer polymerization

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Two thin middle-crust low-velocity zones imaged in the Chuan-Dian region of southeastern Tibetan Plateau and their tectonic implications

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Science China Earth Sciences 2024年第5期67卷 1675-1686页

作者： Long li Xin wang Guangbing HOU Yuan liNG Yinshuang ai Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China

Intracrustal low-velocity zones(LVZs)indicate a mechanically weak crust and are widely observed in the southeast margin of the Tibetan ***,their spatial distributions and formation mechanisms remain *** investigate their distribution and detailed morphology of the LVZs in the southeastern Tibetan Plateau,here we used teleseismic events and continuous waveform data recorded by 40 broadband seismic stations newly deployed in the Sichuan-Yunnan region from December 2018 to October 2020.A total of 12,924 high-quality P-wave receiver functions and 5–40 s fundamental Rayleigh surface wave phase velocity dispersion curves from ambient noise cross-correlation functions were *** Swave velocity model at a depth interval of 0–100 km in the study area was inverted by using the trans-dimensional Markov chain Monte Carlo strategy to jointly invert the complementary data of the receiver function waveform and Rayleigh surface wave phase velocity *** results show that there are two separate LVZs(~3.5 km/s)surrounding the rigid Daliangshan subblock at crustal depths of approximately 30–40 km,providing new constraints on the geometry of the LVZs in our study *** two LVZs obtained in this study may represent the middle crustal flow channels,through which the material in the center of the Tibetan Plateau extrudes to its southeast *** by the rigid Sichuan Basin and the spindle-like Daliangshan subblock,the material continues to flow southward through the mechanically weak middle crustal channels surrounding the Daliangshan *** addition,the existence of thin LVZs in the middle crust plays an important role in understanding the decoupling between the upper and lower crust in the study *** also provides new constraint on the complex tectonic deformation process of the southeastern margin of the Tibetan Plateau caused by the collision and compression of the Indian and the Eurasian plates.

关键词： Southeastern Tibetan Plateau Joint inversion Intracrustal low-velocity zone Mid-crustal channel flow

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Laparoscopic transcystic common bile duct exploration and laparoscopic transductal common bile duct exploration in elderly patients with cholecystolithiasis combined with choledocholithiasis

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Chinese Medical Journal 2019年第14期132卷 1745-1746页

作者： Yun-Feng wang ai-li wang Zhen li He-Ping Zeng Min Tang Zhen-Xiong Ye Hui wang Yong-Bing wang Xiao-Qing Jiang Department of General Surgery Pudong New Area People's HospitalShanghai University of Medicine & Health SciencesShanghai 201200China Department of General Surgery Yangpu HospitalTongji University School of MedicineShanghai 200090China The First Department of Biliary Surgery Eastern Hepatobiliary Surgery Hospital of the Second Military Medical UniversityShanghai 200433China

To the Editor:With the development of minimally invasive surgical technology,laparoscopic transcystic common bile duct exploration plus laparoscopic cholecystectomy (LTCBDE + LC) has become the first choice of treatment for cholecystolithiasis combined with biliary *** addition,there is little prospective *** compared 150 patients who underwent LTCBDE + LC with 150 patients who underwent laparoscopic transductal common bile duct exploration (LTDBDE)+ *** patients and participants were informed of the study and voluntarily provided informed consent.

关键词： LTCBDE LC choledocholithiasis

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Determination of multilevel chirality in nickel molybdate films by electron crystallography

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Nano Research 2024年第9期17卷 8571-8577页

作者： Jing ai Yu wang liyuan li Jianqiang wang Te Bai Shunai Che Lu Han Sinopec(Shanghai)Research Institute of Petrochemical Technology Co. Ltd.Shanghai 201208China School of Chemical Science and Engineering Tongji UniversityShanghai 200092China School of Chemistry and Chemical Engineering State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China

Chiral inorganic materials have attracted great attention owning to their unique physical and chemical properties attributed to the symmetry-breaking of their *** inorganic materials can be endowed with chiral geometric configurations from achiral space group crystals through lattice twisting,screw dislocations or hierarchical self-assembled spiral morphologies,showing various characteristic chiral ***,the multilevel chirality in chiral nickel molybdate films(CNMFs)remains to be elaborately *** this paper,we report three hierarchical levels of chirality in CNMFs,spanning from the atomic to the micron scale,including primary helically coiled nanoflakes with twisted atomic crystal lattices,secondary helical stacking of layered nanoflakes,and tertiary asymmetric morphology between adjacent *** findings may enrich the chiral self-assembly structural types and provide valuable insights for the comprehensive analysis path of hierarchical chiral crystals.

关键词： chiral inorganic material nickel molybdate structural analysis transmission electron microscopy electron crystallography

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3D-QSAR Studies of Dimethoxyphenoxyphenoxy pyrimidines and Analogues

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Chinese Journal of Structural Chemistry 2000年第2期19卷 107-111页

作者： li ai Xiu wang Jin ling SU Hua Qing MIAO Fang Ming (Institute of Chemical Crystallography, Tianjin Normal University, Tianjin, 300074) 天津师范大学天津 3 0 0 0 74

Three dimensional quantitative structure activity relationships (3D QSAR) of a series of dimethoxyphenoxyphenoxypyrimidines and analogues which are known to be photosystem Ⅱ(PSⅡ)inhibitors have been studied using comparative molecular field analysis (CoMFA) method. The results suggest that the steric and electronic properties of substitutes at m position on the end phenyl ring have important influence on the Hill reaction inhibition.

关键词： D QSAR photosystem Ⅱinhibitor CoMFA

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Clinical Analysis and Mental Health Survey of Hemophilia Carriers:a Cross-sectional Study

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Current Medical Science 2024年第2期44卷 435-440页

作者： Wen wang li-juan JIANG Dong-yan CUI ai ZHANG Xiong wang ai-guo liU Qun HU Department of Pediatrics Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Laboratory Medicine Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Objective:Hemophilia carriers(HCs),who are heterozygous for mutations in the clotting factor VIII/clotting factor IX gene(F8 or F9),may have a wide range of clotting factor levels,from very low,similar to afflicted males,to the upper limit of normal,and may experience mental health *** purpose of this study was to provide genetic information on mothers of hemophilia patients and to understand the clotting factor activity and phenotype of ***,we aimed to investigate the mental health status of HCs in ***:A total of 127 hemophilia mothers,including 93 hemophilia A(HA)mothers and 34 hemophilia B(HB)mothers,were enrolled in this *** distance PCR,multiplex PCR,and Sanger sequencing were used to analyze mutations in F8 or *** factor activity was detected by a one-stage clotting *** Symptom Checklist 90(SCL-90,China/Mandarin version)was given to HCs at the same time to assess their mental ***:A total of 90.6%of hemophilia mothers were diagnosed genetically as carriers,with inversion in intron 22 and missense mutations being the most common mutation types in HA and HB carriers,*** median clotting factor level in carriers was 0.74 IU/mL(ranging from 0.09 to 1.74 IU/mL)compared with 1.49 IU/mL(ranging from 0.93 to 1.89 IU/mL)in noncarriers,of which 14.3%of HCs had clotting factor levels of 0.40 IU/mL or below.A total of 53.8%(7/13)of HA carriers with low clotting factor levels(less than 0.50 IU/mL)had a history of bleeding,while none of the HB carriers displayed a bleeding *** total mean score and the global severity index of the SCL-90 for surveyed HCs were 171.00(±60.37)and 1.78(±0.59),respectively.A total of 67.7%of the respondents had psychological symptoms,with obsessive-compulsive disorder being the most prevalent and *** pooled estimates of all nine factors were significantly higher than those in the general population(P<0.05).Conclusions:The detection rate of gene mutations

关键词： hemophilia A hemophilia B mutation carrier mental health

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Two-Staged Method for Ice Channel Identification Based on Image Segmentation and Corner Point Regression

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China Ocean Engineering 2024年第2期38卷 313-325页

作者： DONG Wen-bo ZHOU li DING Shi-feng wang ai-ming Cai Jin-yan School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Naval Architecture Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Identification of the ice channel is the basic technology for developing intelligent ships in ice-covered waters,which is important to ensure the safety and economy of *** the Arctic,merchant ships with low ice class often navigate in channels opened up by *** in the ice channel often depends on good maneuverability skills and abundant experience from the captain to a large *** ship may get stuck if steered into ice fields off the *** this circumstance,it is very important to study how to identify the boundary lines of ice channels with a reliable *** this paper,a two-staged ice channel identification method is developed based on image segmentation and corner point *** first stage employs the image segmentation method to extract channel *** the second stage,an intelligent corner regression network is proposed to extract the channel boundary lines from the channel region.A non-intelligent angle-based filtering and clustering method is proposed and compared with corner point regression *** training and evaluation of the segmentation method and corner regression network are carried out on the synthetic and real ice channel *** evaluation results show that the accuracy of the method using the corner point regression network in the second stage is achieved as high as 73.33%on the synthetic ice channel dataset and 70.66%on the real ice channel dataset,and the processing speed can reach up to 14.58frames per second.

关键词： ice channel ship navigation identification image segmentation corner point regression

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