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Structure of 6-Epiforsticine and Revision of the Stereochemistry of Forsticine

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Chinese Chemical Letters 2000年第11期11卷 1003-1004页

作者： Wang, FP Li, ZB Chen, jj Yang, JS W China Univ Med Sci Sch Pharm Dept Chem Med Nat Prod Chengdu 610041 Peoples R China Chinese Acad Sci Kunming Inst Bot Kunming 650204 Peoples R China

A norditerpenoid alkaloid, 6-epiforsticine, has been isolated from the roots of the plants. Aconitum hemsleyanum var. pengzhouense and A. kuzsnezoffii and its structure has been established as 1 on the basis of 2D-NMR... 详细信息

关键词： Structure of 6-Epiforsticine and Revision of the Stereochemistry of Forsticine

Copper Matrix Composites Reinforced with Nanometer Alumina Particle

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Journal of Materials Science & Technology 1999年第2期15卷 143-146页

作者： Wu, jj Li, GB Zhang, Y Jiang, ZX Lei, TQ Hebei Univ Technol Dept Mat Sci & Engn Tianjing 300130 Peoples R China Harbin Inst Technol Harbin 150006 Peoples R China

The microstructure and properties of the oxide particle dispersion strengthened composite fabricated by internal oxidation method have been studied. Using nitrogen base atmosphere and a new process flow we can improve the quality of the MMCs and decrease the cost of the composites. The size of alumina is in the nanometer order of magnitude and the particles are well distributed. Under the condition of having good electrical conductivity, the composites have 1 to 2 times higher mechanical properties than those of pure Cu.

关键词： Metallic matrix composites

Internal Oxidation of Cu-Al Alloy

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Journal of Materials Science & Technology 1999年第5期15卷 444-448页

作者： Wu, jj Zhang, Y Shen, YT Li, GB Lei, TQ Hebei Univ Technol Dept Mat Sci & Engn Tianjin 300130 Peoples R China Harbin Inst Technol Sch Mat Sci & Engn Harbin 150006 Peoples R China

The thermodynamics and kinetics of the internal oxidation in dilute Cu-Al alloy are investigated. The internal oxidation of copper alloy containing 0.2 similar to 1.2 wt pet Al is studied in the temperature range from 1073 K to 1273 K. A related equilibrium diagram is drawn. A mathematic model of oxidation layer depth is developed on the base of the experimental results. The experiments and investigation show that the formation rate of the internal oxidation layer is mainly controlled by the diffusion of O in matrix, the O concentration on the surface and the Al concentration in the alloy.

关键词： Copper alloys

A NEW REARRANGED ABIETANE DITERPENOID FROM CARYOPTERIS INCANA(THUNB)MIQ

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Chinese Chemical Letters 1996年第7期7卷 621-622页

作者： Gao, jj Han, GQ Yan, JF Wu, Y BEIJING MED UNIV NATL LAB NAT & BIOMIMET DRUGSBEIJING 100083PEOPLES R CHINA RES INST CHEM DEF ANALYT CHEM LABBEIJING 100083PEOPLES R CHINA LANZHOU UNIV STATE KEY LAB APPL ORGAN CHEMLANZHOU 730000PEOPLES R CHINA

A new rearranged abietane diterpenoid, incanone was isolated from the whole plant of Caryopteris incana (Thunb.) Miq. On the basis of HRMS, EIMS, (1)HNMR, (13)CNMR, DEPT, H-1-H-1 COSY, HMQC, HMBC and NOESY, incanone w...

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Glyco-poly-L-lysine is better than liposomal delivery of exogenous genes to rat liver

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World Journal of Gastroenterology 2000年第4期6卷 526-531页

作者： Yang, CQ Wang, JY He, BM Liu, jj Guo, JS Shanghai Med Univ Zhongshan Hosp Div Gastroenterol Shanghai 200032 Peoples R China

AIM To compare the effects of liposomes andglyco-poly-L-lysine on liver targeted uptake andexpression of plasmid in rat *** After binding with lipofectamine orgalactose-terminal glyco-poly-L-lysine,theplasmid could be expressed in eukaryotic cellswhen injected into Wistar rats by *** different time intervals after the injection,the distribution and expression of the plasmid inliver of rats were observed and compared using insitu hybridization and *** The expression of the plasmid bindingto liposomes or G-PLL could be markedly observed24 h later,and began to decrease one week later,but it still could be observed up to three *** liposomes and G-PLL could deliver theplasmid to the liver effectively,but the effect of thelatter was better than the former concerning thedistribution and expression of the plasmid targeteduptake in the *** G-PLL is better than liposome asthe targeted carrier for delivering exogenous genesto the liver.

关键词： liposomes glyco-poly-L-lysine targeted liver uptake exogenous gene

Efficient interfacial charge transfer of BiOCl-In_(2)O_(3) step-scheme heterojunction for boosted photocatalytic degradation of ciprofloxacin

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Journal of Materials Science & Technology 2022年第26期121卷 236-244页

作者： Kaiqiang xu Jie Shen Shiying Zhang Difa xu Xiaohua Chen College of Materials Science and Engineering Hunan UniversityChangsha 410082China Hunan Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha 410005China

BiOCl as a representative layered bismuth-based photocatalyst with Sillén-structure has aroused wide public concern on photocatalytic ***,the photocatalytic efficiency of pristine BiOCl is currently restricted by its low optical absorption and charge separation ***,step-scheme(S-scheme)heterojunctions of In_(2)O_(3) nanoparticle and BiOCl micron-sheet were constructed by a convenient molten salt method by using a LiNO_(3)-KNO_(3) *** In_(2)O_(3)-BiOCl heterojunctions exhibit higher optical absorption performance from 380 nm to 700 nm than the pristine BiOCl and enhanced photocatalytic property toward ciprofloxacin(CIP)degradation under Xenon lamp *** sample 20%In_(2)O_(3) -BiOCl showed the highest photodegradation efficiency,attaining 91%removal of CIP within 35 min,which was 39.6 times and 3.2 times higher than that of pristine In_(2)O_(3) and BiOCl,*** improved photodegradation property mainly resulted from the novel S-scheme mechanism,which boosted highly efficient separation of the photo-induced *** photoluminescence spectrometric test and transient photocurrent response results demonstrated that In_(2)O_(3)-BiOCl composite exhibited efficient separation of photo-generated charge *** work would provide new insights into the design of novel S-scheme photocatalytic systems with applicability in photocatalytic water treatment.

关键词： Step-scheme photocatalyst In_(2)O_(3) BiOCl Photocatalytic activity Ciprofloxacin

An Efficient WRF Framework for Discovering Risk Genes and Abnormal Brain Regions in Parkinson's Disease Based on Imaging Genetics Data

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Journal of Computer Science & Technology 2021年第2期36卷 361-374页

作者： Xia-An Bi Zhao-xu Xing Rui-Hui xu Xi Hu College of Information Science and Engineering Hunan Normal UniversityChangsha 410006China Hunan Provincial Key Laboratory of Intelligent Computing and Language Information Processing Hunan Normal UniversityChangsha 410006China

As an emerging research field of brain science,multimodal data fusion analysis has attracted broader attention in the study of complex brain diseases such as Parkinson's disease(PD).However,current studies primarily lie with detecting the association among different modal data and reducing data *** data mining method after fusion and the overall analysis framework are *** this study,we propose a weighted random forest(WRF)model as the feature screening *** interactions between genes and brain regions are detected as input multimodal fusion features by the correlation analysis *** implement sample classification and optimal feature selection based on WRF,and construct a multimodal analysis framework for exploring the pathogenic factors of *** experimental results in Parkinson's Progression Markers Initiative(PPMI)database show that WRF performs better compared with some advanced methods,and the brain regions and genes related to PD are *** fusion of multi-modal data can improve the classification of PD patients and detect the pathogenic factors more comprehensively,which provides a novel perspective for the diagnosis and research of *** also show the great potential of WRF to perform the multimodal data fusion analysis of other brain diseases.

关键词： multimodal fusion feature Parkinson's disease pathogenic factor detection sample classification weighted random forest model

Shuttle imaging radar-C (SIR-C) detection for the Cenozoic volcanoes in West Kunlun, China

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Chinese Science Bulletin 1997年第16期42卷 1407-1408页

作者： Guo, HD Liao, jj Wang, CL Chinese Acad Sci Inst Remote Sensing Applicat Beijing 100101 Peoples R China

THE technique of imaging radar remote sensing is one of the most important means for earth observation in the 1990s. Imaging radar, transmitting electromagnetic wave from its sideways, is very sensitive to the surface roughness and, to a large extent, can accentuate the terrain information and explicitly depict the details of surface features. Therefore, it is

关键词： SIR-C China Shuttle imaging radar-C detection for the Cenozoic volcanoes in West Kunlun West

Improved Differential Evolution with Shrinking Space Technique for Constrained Optimization

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Chinese Journal of Mechanical Engineering 2017年第3期30卷 553-565页

作者： Chunming FU Yadong xu Chao JIANG xu HAN Zhiliang HUANG State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University School of Mechanical Engineering Nanjing University of Science and Technology

Most of the current evolutionary algorithms for constrained optimization algorithm are low computational efficiency. In order to improve efficiency, an improved differential evolution with shrinking space technique and adaptive trade-off model, named ATMDE, is proposed to solve constrained optimization problems. The proposed ATMDE algorithm employs an improved differential evolution as the search optimizer to generate new offspring individuals into evolutionary population. For the con- straints, the adaptive trade-off model as one of the most important constraint-handling techniques is employed to select better individuals to retain into the next population, which could effectively handle multiple constraints. Then the shrinking space technique is designed to shrink the search region according to feedback information in order to improve computational efficiency without losing accuracy. The improved DE algorithm introduces three different mutant strategies to generate different offspring into evo- lutionary population. Moreover, a new mutant strategy called ＂DE/rand/best/l＂ is constructed to generate new individuals according to the feasibility proportion ofcurrent population. Finally, the effectiveness of the pro- posed method is verified by a suite of benchmark functions and practical engineering problems. This research presents a constrained evolutionary algorithm with high efficiency and accuracy for constrained optimization problems.

关键词： Constrained optimization - Differentialevolution Adaptive trade-off model Shrinking spacetechnique