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Chemical Research in Chinese Universities 1992年第2期8卷 126-128页

作者： YU Ji-hong, XIAO Feng-shou and XU Ru-ren (Department of Chemistry, Jilin university, Changchun, 130023)YUE Yong (wuhan Institute of Physics, Academia Sinica, wuhan,430071)

Late in 1970’s, a new series of molecular sieves, aluminophosphates was discovered in the Union Carbide Laboratories, which have been used as catalysts for petroleum and chemical industries. Recently several novel types of zeolitic microporous aluminoborates named as B-C;have been synthesized from a mixture of Na;OCaO-B;O;-Al;O;-R-H;O（R=templates） by Xu and his co-workers. Most of them

关键词： Molecular sieve Micropore Alumino-borate NMR

Study on the Flow Injection Micro-Column Pre-Separation System Coupled With High Performance Liquid Chromatography for the Determination of Ecdysterone in Traditional Chinese Medicine

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wuhan university Journal of Natural Sciences 2000年第1期5卷 83-88页

作者： SHUAI Qin QIN Yong-chao JIANG Zu-cheng LI Feng LIAO Zhen-huan (College of Chemistry and Environmental Science, wuhan university, wuhan 430072, china) wuhan university College of Chemistry and Environmental Science Wuhan China (GRID:grid.49470.3e) (ISNI:***)

A flow injection (FI) micro-column system coupled with high performance liquid chromatography (HPLC) was proposed for the pre-separation and determination of active organic component (ecdysterone) in traditional Chinese medicine, Loulu. The factors influencing separation performance were investigated and optimized. Under the optimal conditions, the contents of ecdysterone in Loulu were determined by HPLC system using MeOH-H_2O (40: 60,V/V) as the mobile phase at a flow rate of 1. 0 mL/min. The calibration curve was linear in the range of 0. 5~ 100 mg/L of ecdysterone concentrations. The detection limit of the analyte was 0. 11mol/L(3) with a precision of 0. 38% RSD (n=7 f c= 10. 0 mg/L). The average recovery of the method was 98. 7%. The proposed method has been applied to determine ecdysterone in practical samples, and the determined values by both external standard method and standard addition method were in good agreement. Compared to the traditional solid extraction method, the system proposed has the advantages of simple procedure, good reproducibility, minimum volume requirement, reduction of matrix interference and low contamination risk.

关键词： high performance liquid chromatography(HPLC) Flow injection analysis (FIA) ecdysterone traditional Chinese medicine

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ZnO梳状亚微米结构的生长及其光学性质

武汉大学学报（理学版） 2011年第3期57卷 210-214页

作者：韦瑞霞李金钗武汉大学物理科学与技术学院湖北武汉430072

在较低温度(460℃)和无催化剂的条件下,通过热蒸发纯Zn粉在硅衬底上成功地制备出ZnO亚微米梳状结构.采用X射线衍射仪(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)和室温光致发光光谱(PL)等技术分别研究了制备样品的晶体结构、表面... 详细信息

在较低温度(460℃)和无催化剂的条件下,通过热蒸发纯Zn粉在硅衬底上成功地制备出ZnO亚微米梳状结构.采用X射线衍射仪(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)和室温光致发光光谱(PL)等技术分别研究了制备样品的晶体结构、表面形貌和光学性质.结果表明,具有均一直径和长度的单晶梳齿规则地生长在作为梳干的ZnO纳米片的Zn-(0001)极性面并沿[0001]方向择优生长.逆气流生长的样品的梳齿粗于顺气流生长样品的梳齿,而其波长为500 nm左右的绿色PL发射峰强度明显低于顺气流样品的发射峰强度,揭示出在氧气较充足的逆气流环境下生长的样品中的氧空位缺陷少于顺气流下生长的样品的氧空位缺陷.样品表面的Au纳米颗粒修饰大大增强了制备的梳状结构样品的紫外发射光强度,并明显降低了样品的绿色光致发射峰强度.

关键词： ZnO 梳状结构化学气相沉积光致发光

Radiosonde observations of high-latitude planetary waves in the lower atmosphere

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Science china Earth Sciences 2010年第6期53卷 919-932页

作者： WANG Rui1,2,3, ZHANG ShaoDong1,2,3 & YI Fan1,2,3 1 School of Electronic Information, wuhan university, wuhan 430079, china 2 Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, wuhan 430079, china 3 State Observatory for Atmospheric Remote Sensing, wuhan 430079, china 1. School of Electronic Information Wuhan University Wuhan 430079 China2. Key Laboratory of Geospace Environment and Geodesy Ministry of Education Wuhan 430079 China3. State Observatory for Atmospheric Remote Sensing Wuhan 430079 China

The characteristics of high-latitude planetary waves (PWs) in the troposphere and lower stratosphere (TLS) are studied by using the data from radiosonde observations during 1998 to 2006 at three Alaskan stations in USA (Nome, 64.50°N, 165.43°W; McGrath, 62.97°N, 155.62°W; Fairbanks, 64.82°N, 147.87°W). It is found that strong PWs exist in two regions. One is around tropopause, and the other is in the polar night jet (PNJ) in winter. The PW activities are rather intermittent, and their lifetimes are no longer than two months. Among three perturbation components in zonal and meridional winds and temperature, the temperature disturbance amplitude is the smallest, and the amplitude for the meridional wind component the largest. Around the tropopause, quasi 5-, 10-, and 16-day PW activities can be observed simultaneously. Among these PW components, the quasi 5-day and 10-day PW are the weakest and strongest, respectively. Moreover, PWs around the tropopause are complex and no obvious season variability can be observed. However, in the PNJ, the higher region, only obvious quasi 10-day and 16-day PWs remain, with smaller amplitudes than those around the tropopause. And significant PWs in the PNJ occur only in winter. By calculating the refractive index for PWs, it is found that there is a persistent reflection layer around 11 km, which is thick in summer and becomes thin or even disappears in winter, revealing that PWs in the stratosphere can only occur in winter. PWs in the 2003/2004 winter at the three stations are analyzed in detail. It is found that for the focused observation duration, the quasi 10-day and quasi 16-day waves exist mainly in the troposphere and stratosphere, respectively. The quasi 10-day wave is a standing wave in the vertical direction, with vertical wavelength about 12 km in the temperature component and larger than 26 km in the meridional component. Moreover, the tropospheric quasi 10-day wave propagates westward with the zonal numbers between 2 an

关键词： planetary waves troposphere and lower stratosphere radiosonde

Fractal and Multifractal Modeling of Hydrothermal Mineral Deposit Spectrum: Application to Gold Deposits in Abitibi Area, Ontario, Canada

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Journal of china university of Geosciences 2003年第3期14卷 199-206页

作者： Cheng Qiuming Department of Earth and Atmospheric Science, Department of Geography, York university, Toronto, Canada M3J1P3 Faculty of Earth Resources, china university of Geosciences, wuhan 430074 Department of Earth and Atmospheric Science Department of Geography York University Toronto Canada M3J1P3 Faculty of Earth Resources China University of Geosciences Wuhan 430074

A number of fractal/multifractal methods are introduced for quantifying the mineral deposit spectrum which include a number-size model, grade-tonnage model, power spectrum model, multifractal model and an eigenvalue spectrum model. The first two models characterize mineral deposits spectra based on relationships among the measures of mineral deposits. These include the number of deposits, size of deposits, concentration and volume of mineral deposits. The last three methods that deal with the spatial-temporal spectra of mineral deposit studies are all expected to be popularized in near future. A case study of hydrothermal gold deposits from the Abitibi area, a world-class mineral district, is used to demonstrate the principle as well as the applications of methods proposed in this paper. It has been shown that fractal and multifractal models are generally applicable to modeling of mineral deposits and occurrences. Clusters of mineral deposits were identified by several methods including the power spectral analysis, singularity analysis and the eigenvalue analysis. These clusters contain most of the known mineral deposits in the Timmins and Kirkland Lake camps.

关键词： mineralization spectrum power-spectrum multifractal spectrum eigenvalue spectrum and GIS modeling

In vitro metabolic characteristics of cytochrome P-450 2A6 in Chinese liver microsomes

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In vitro metabolic characteristics of cytochrome P-450 2A6 i...

Effect of Ephrin-A1/EphA2 on Invasion of Trophoblastic Cells

2002全国青年药理学英文学术会议

作者： XIA Xue-Yan, PENG Ren-Xiu, YU Jie-Ping(Department of Pharmacology, Medical College of wuhan university, wuhan 430071 Department of Gastroenterology, Renmin Hospital, Medical College of wuhan university, wuhan 430060, china)

AIM: To investigate the kinetic characteristics of CYP2A6 in human liver microsomes. METHODS: Cytochrome P-450 enzyme activities were measured by biochemical assays. Xenobiotics were employed to observe their effects on CYP2A6 in vitro. The kinetics of coumarin 7-hydroxylase was determined, and the correlation between CYP2A6 and UDP-glucuronosyltransferase (UGT) was analyzed. RESULTS: Human liver microsome CYP2A6 were from 0.47 to 4.14μmol/min·g, with a 8.8-fold variation. The K and V of CYP2A6 ranged from 0.25 to 1.56μmol/L and 1.41 to 8.70μmol/min·g, respectively. CYP2A6 activity was markedly inhibited (>50％) by pilocarpine, diethyldithiocarbamate (DDC), and rifampicin, the IC was 5.31μmol/L, 156.35μmol/L, and 38.81μmol/L, respectively, α-naphthoflavone, sulfaphenazole, troleandomycin (TAO), ketoconazole, phenobarbital, prednisolone, and azithromycin had little or no effects on coumarin 7-hydroxylation. A significant correlation was observed between CYP2A6 and UGT2 (r=0.9453, P<0.05). CONCLUSION: CYP2A6 activity and kinetics exhibited a considerable variation in human liver microsomes in vitro, and a significant correlation was existed between CYP2A6 and phase Ⅱ enzyme-UGT. Not only the selective CYP2A6 inhibitor-pilocarpine but also DDC, rifampicin inhibited CYP2A6 activity.

关键词： cytochrome P-450 CYP2A6 coumarins glucuronosyltransferase liver microsome

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Journal of Huazhong university of Science and technology(Medical Sciences) 2011年第6期31卷 824-827页

作者：杨昀闵洁 Department of Obstetrics and Gynecology Union Hospital Tongji Medical College Huazhong University of Science and Technology

The effect of axon guidance factors ephrin-A1/EphA2 on the invasion of trophoblastic cells and the possible mechanism were investigated in this study. The expression of EphA2 in vascular endothelial cells was detected by immunohistochemistry. The proliferation and invasion of TEV-1 cells （an extravillous trophoblastic cell line） in first trimester were determined by cell counting kit-8 （CCK-8） and Transwell invasion assay. Real-time PCR was used to detect the expression ofephrin-A1 in TEV-I cells treated with EphA2 at different concentrations （10, 50, 100, 500, 1000 and 5000 μg/L）. The results showed：（1） EphA2 was expressed in the vascular endothelial cells; （2） EphA2 could promote the proliferation of TEV-1 cells. The proliferative capacity reached a peak in TEV-1 cells treated with 100 μg/L EphA2 （P〈0.05）; （3） EphA2 could increase the invasion of TEV-1 cells. The invasive ability was the greatest in TEV-1 cells treated with 500 pg/L EphA2 （P〈0.05）; （4） in the presence of EphA2 （0-500 μg/L）, the expression of ephrin-A1 was increased concentration-dependently （P〈0.05）, but when the concentration of EphA2 was over 500 μg/L, the expression of ephrin-A 1 ceased to increase （P〉0.05）. It was concluded that EphA2 can promote the invasion and proliferation of the human extravillous trophoblastic cells probably by regulating the ephrin-A1 ligand.

关键词： axon guidance factor receptors extravillous trophoblastic cells

Research on Knowledge Diffusion Model Based on Organizational Learning Network

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Research on Knowledge Diffusion Model Based on Organizationa...

2010 Chinese Control and Decision Conference

作者： Shaocheng Qu,Sha Li,Wenhui Tian Dept.of Information and technology,Huazhong Normal university,wuhan,430079,china

An organizational learning network based on a new knowledge diffusion model is ***,a simple organizational network model with uniform knowledge absorptive law is *** a knowledge diffusion model with forgetting factor is designed to describe the knowledge dynamics of the overall *** analyzing the average level of knowledge,the variance of knowledge allocation and the variation coefficient of knowledge levels of the network,diffusion efficiency of the organizational learning network is studied,and sensibility of the overall network is ***, simulation results demonstrate that diffusion mechanism and evolutionary process of the organizational learning network is effective.

关键词： Organizational Learning Complex Network Small-World Network Model Knowledge Diffusion Model

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绕三圆柱流体的LB模拟

武汉大学学报（自然科学版） 1998年第1期44卷 37-40页

作者：陈炬桦熊盛武武汉大学软件工程国家重点实验室

介绍一个流体动力学的格子Ｂｏｌｔｚｍａｎｎ并行模拟模型．用该模型模拟了流体动力学中的绕三圆柱流体现象．利用计算机可视化技术，该模型可动态显示流体的演化过程，可以很方便的用于分析各种流体动力学现象．

关键词：计算机模拟并行计算流体动力学 LB法

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试论现代历史观念的演变与问题

学习与探索 2003年第6期 1-7页

作者：张曙光华中科技大学哲学系湖北武汉430074

以进步主义作为思想旨趣的现代历史观念产生于西方,随着地域性历史转向世界历史,进步主义的现代历史观念在全世界获得了主导性地位。但是,资本主义所开辟的世界历史,从一开始就存在着普世主义的道义与西方中心的强权的矛盾,并且使发展... 详细信息

以进步主义作为思想旨趣的现代历史观念产生于西方,随着地域性历史转向世界历史,进步主义的现代历史观念在全世界获得了主导性地位。但是,资本主义所开辟的世界历史,从一开始就存在着普世主义的道义与西方中心的强权的矛盾,并且使发展中国家陷入传统与现代的对立,难以实现全面的进步。自上世纪初迄今,进步主义的历史观念在世界范围内遭到现实与理论两方面挑战,成为人们质疑的对象,在西方更是呈衰落之势。通过对现代历史观念演变的梳理,我们可以从中发现现代历史的根本性问题,并由此对历史与现代的关系做出新的阐释。

关键词：现代历史观念世界历史进步主义强力意志相对主义