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The CXXC finger 5 protein is required for DNA damage-induced p53 activation

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Science china(Life Sciences) 2009年第6期52卷 528-538页

作者： ZHANG Min1,WANG RuiPeng1,WANG YanYi 2,DIAO FeiCi1,LU Fei1,GAO Dong1,CHEN DanYing 1,ZHAI ZhongHe1 & SHU HongBing2 1 college of Life Sciences,Peking university,Beijing 100871,china 2 college of Life Sciences,Wuhan university,Wuhan 430072,china college of Life Sciences Peking University Beijing 100871 China college of Life Sciences Wuhan University Wuhan 430072 China

The tumor suppressor p53 is a critical component of the DNA damage response pathway that induces a set of genes responsible for cell cycle arrest,senescence,apoptosis,and DNA *** ataxia te-langiectasia mutated protein kinase(ATM) responds to DNA-damage stimuli and signals p53 stabiliza-tion and activation,thereby facilitating transactivation of p53 inducible genes and maintainence of genome *** this study,we identified a CXXC zinc finger domain containing protein termed CF5 as a critical component in the DNA damage signaling ***5 induces p53 transcriptional activity and apoptosis in cells expressing wild type p53 but not in p53-deficient *** of CF5 in-hibits DNA damage-induced p53 activation as well as cell cycle ***,CF5 physically interacts with ATM and is required for DNA damage-induced ATM phosphorylation but not its recruitment to *** findings suggest that CF5 plays a crucial role in ATM-p53 signaling in response to DNA damage.

关键词： p53 ATM DNA damage apoptosis

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环绕光子晶体微带贴片天线衬底厚度影响分析

系统仿真学报 2009年第22期21卷 7088-7090页

作者：张梅胡欣如林穗电子科技大学电子工程学院成都610054 广东工业大学计算机学院广州510006

以有限元法模拟一种环绕光子晶体的微带贴片天线,解出与理论结果有极好吻合的谐振频率后并进一步求解辐射性能,与常规微带贴片天线相比较证实了这种贴片天线能够抑制表面波,提高辐射增益,再改变天线衬底厚度进行仿真并讨论反射系数和辐... 详细信息

以有限元法模拟一种环绕光子晶体的微带贴片天线,解出与理论结果有极好吻合的谐振频率后并进一步求解辐射性能,与常规微带贴片天线相比较证实了这种贴片天线能够抑制表面波,提高辐射增益,再改变天线衬底厚度进行仿真并讨论反射系数和辐射方向图的变化。

关键词：光子带隙微带贴片天线辐射方向图谐振频率有限元法衬底

A Comparison Study between Suspension Casting Process and Low Superheat Casting Process

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International Journal of Minerals,Metallurgy and Materials 1999年第1期13卷 31-34页

作者： Yan Yu Qijie Thai Libo Zhang Hanqi Hu (Materials Science and Engineering School, university of Science and technology Beliing, Beding 100083, china)(Shenyang Research Institute of Foundry, Shenyang 110021, china) Materials Science and Engineering School University of Science and Technology Beijing Beijing 100083 China Shenyang Research Institute of Foundry Shenyang 110021 China

Taking GCr15 bearing steel as experiment material, the effects of suspension casting process and low superheat casting process on the solidification of ingot were studied comparehvely. The results show that both suspension casting process and low superheat casting process can improve the censeal segregation and crystal structure of ingot. As the acting mechanism is different between the two kinds of processes, it is found that suspension casting process is more effective than low superheat casting process in improving the quality of ingot.

关键词： suspension casting process low superheat casting process solidification

Phase evolutions of two kinds of co-precipitated indium-tin oxide pre-cursors by heat-treatment

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Rare Metals 2005年第2期24卷 146-150页

作者： CHENShuguang LIChenhui XIONGWeihao LIULangming WANGHui ZhnzhouSmelterGroupCo.Ltd. Zhuzhou412004China StateKeyLabforPlasticFormingSimulation＆DieandMouldtechnology HnazhongUniversityofScienceandTechnologyWuhan430074China／／ZhnzhouSmelterGroupCo.Ltd.Zhuzhou412004China StateKeyLabforPlasticFormingSimulation＆DieandMouldtechnology HnazhongUniversityofScienceandTechnologyWuhan430074China

Two kinds of indium-tin oxide (ITO) precursors, cubic indium hydroxide(In(OH)_3) and orthorhombic indium oxide hydroxide (InOOH), were prepared by a co-precipitationmethod. With the help of X-ray diffraction (XRD), thermo-gravimetric analysis (TGA) and differentialthermal analysis (DTA), phase evolutions from cubic In(OH)_3 and orthorhombic InOOH to cubic ITOsolid solution and rhombohedral ITO solid solution by heat-treatment had been comprehensivelyinvestigated. The transformation from cubic In(OH)_3 to cubic ITO solid solution started as low as150 deg C and ended at about 300 degC, and it exhibited an endothermic behavior. The transformationfrom orthorhombic InOOH to rhombohedral ITO solid solution started at 220 deg C and ended at about430 deg C. Moreover, this transformation was composed of two processes: the one was the dehydrationof InOOH exhibiting an endothermic behavior and the other was the transformation from dehydrationproducts to rhombohedral ITO solid solution exhibiting a strong exothermic behavior. RhombohedralITO solid solution was metastable in air and it would transform to cubic ITO solid solution byheat-treatment. The transformation from rhombohedral ITO solid solution to cubic ITO solid solutionstarted at 578 deg C and ended below 800 deg C, and it exhibited a weak exothermic behavior.

关键词： inorganic and nonmetallic materials crystal structure X-ray techniques indium-tin oxide

An efficient algorithm for finding the largest chain graph according to a given chain graph

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Science china Mathematics 2005年第11期48卷 1517-1530页

作者： LIU Baijun,ZHENG Zhongguo & ZHAO Hui School of Mathematical Sciences, Peking university, Beijing 100871, china Department of Statistics, Central china Normal university, Wuhan 430079, china 1. School of Mathematical Sciences Peking University 100871 Beijing China 2. Department of Statistics Central China Normal University 430079 Wuhan China

Chain graph (CG) is a general model of graphical Markov models. Some different chain graphs may describe the same conditional independence structure, then we say that these CGs are Markov equivalent. In 1990 Frydenberg showed that every class of Markov equivalent CGs has a CG which is called the largest chain graph with the greatest number of lines. This paper presents an efficient algorithm for finding the largest chain graph of the corresponding Markov equivalent class of a given CG. The computational complexity of the algorithm is O(n3). It is more efficient than the complexity O(n!) of the present algorithms. Also a more intuitive graphical characterization of the largest chain graph is provided based on the algorithm in this paper.

关键词： graphical Markov model,chain graph,largest chain graph,protected arrows,efficient algorithm

Effects of Chinese Milk Vetch (Astragalus sinicus L.) Residue Incorporation on CH4 and N2O Emission from a Double-Rice Paddy Soil

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Journal of Integrative Agriculture 2012年第9期11卷 1537-1544页

作者： ZHU Bo1,YI Li-xia1, HU Yue-gao1, ZENG Zhao-hai1, TANG Hai-ming2, YANG Guang-li2 and XIAO Xiao-ping2 1 college of Agronomy and Biotechnology, china Agricultural university, Beijing 100193, P.R.china 2 Hunan Soil and Fertilizer Institute, Changsha 410125, P.R.china [a] college of Agronomy and Biotechnology China Agricultural University Beijing 100193 P.R. China [b] Hunan Soil and Fertilizer Institute Changsha 410125 P.R. China

Methane (CH 4 ) and nitrous oxide (N 2 O) emissions from paddy soils have seldom been estimated when leguminous green manure is applied as a nitrogen source. In this paper, gas fluxes were measured by using a pot sampling device combined with a static chamber method to estimate the effects of Chinese milk vetch (Astragalus sinicus L., CMV) on CH 4 and N 2 O emissions and their integrated global warming potentials (GWP) in a double-rice cropping system. Four treatments (no nitrogen fertilizer, NF; urea as chemical fertilizer, CF; CMV incorporation, MV; 50% CMV incorporation and 50% urea, MVCF) were established. CH 4 flux peaked on the 15th d after treatment application. Total season CH 4 emission was increased by MV and MVCF by 370 and 209%, 152 and 66%, when compared with NF and CF, respectively. Most of the increased CH 4 was emitted in the first two months after incorporation of CMV. N 2 O emission from CF was 17- and 5.6-fold higher than that from MV and MVCF, respectively. Application of CMV restricted N 2 O emission caused by the application of urea. Improved CMV residue management was needed to minify CH 4 emission induced by the input of organic material. Despite the highest GWP being found in MV, we recommend CMV, when applied as an N source in paddy fields, as a potential mitigation tool for greenhouse gas emissions.

关键词： Chinese milk vetch double-rice global warming potential methane nitrous oxide

The radio structure of BL Lac object S5 2007+777

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Science china(Physics,Mechanics & Astronomy) 2010年第S1期53卷 187-190页

作者： WU ZhongZu1,3,GU MinFeng2 & CHEN YongJun2 1 college of Science,Guizhou university,Guiyang 550025,china 2 Key Laboratory for Research in Galaxies and Cosmology,Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,china 3 NAOC-GZU Sponsored Center for Astronomy,Guizhou university,Guiyang 550025,china Guizhou Univ Coll Sci Guiyang 550025 Peoples R China Chinese Acad Sci Shanghai Astron Observ Key Lab Res Galaxies & Cosmol Shanghai 200030 Peoples R China Guizhou Univ NAOC GZU Sponsored Ctr Astron Guiyang 550025 Peoples R China

BL Lac object S5 2007+777 has been classified as a HYMOR(Hybrid Morphology radio source) for its hybrid FR I and FR II radio *** is one of four BL Lac objects with a kpc scale extended X-ray *** this paper,we searched the unpublished European VLBI Network(EVN) archived high resolution data for this source,and present the high resolution radio *** EVN images all show a core-jet structure in 1.6,5 and 8 *** combination with the VLA data in the literature,we found position angle differences(△PA) of about 10°-20° between pc and kpc scale jet *** brightness temperature estimated from multi-band EVN images are around 1011.2-1011.8 K,from which the Doppler factor ranges from 3.2 to *** found significant flux variations of the radio core in 1.6 and 5 GHz,from which we derived the variability in brightness temperature Tvar to be 1013.6 K and 1014.0 K,corresponding to the Doppler factors of 9.3 and 12.4,respectively.

关键词： active galactic nuclei VLBI BL Lac objects

Wrapping of Zirconium Phosphate loaded Silver ions by In-situ Emulsion Polymerization

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Wrapping of Zirconium Phosphate loaded Silver ions by In-sit...

TIME-DOMAIN RESPONSES OF IMMERSING TUNNEL ELEMENT UNDER WAVE ACTIONS

2005年全国高分子学术论文报告会

作者： Bi-Jun Huang, Li Zhang School of Chemistry and Environment, south china Normal university, guangzhou 510631, china

Functional powder-Zirconium phosphate loaded silver ions-is wrapped by styrene-acrylic emulsion through in-suit *** increase its compatibility with organic monomers,the powder is modified by silicon coupling reagent(... 详细信息

关键词： In-situ polymerization Styrene-acrylic emulsion Zirconium phosphate loaded silver ions Core-shell particles

来源： cnki会议评论

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Journal of Hydrodynamics 2009年第6期21卷 739-749页

作者： CHEN Zhi-jie WANG Yong-xue WANG Guo-yu HOU Yong State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China CCCC-FHDI Engineering Co. Ltd Guangzhou 510230 China

The time domain responses of the tunnel element under wave actions during its immersion are investigated based on the linear wave diffraction theory. The integral equation is derived by using the time-domain Green function that satisfies the free water surface condition in the finite water depth, and is solved by the boundary element method. The motion equations of the tunnel element are solved by the fourth order Runge-Kutta method. A comparison between the computed and measured results reveals that the numerical model can effectively simulate the motion responses of the tunnel element and the cable tensions when the motions of the tunnel element are within some limit. Taking the tunnel element of 100 m in length, 15 m in width and 10 m in height as an example, the computational results of the motion responses of the tunnel element and the cable tensions in different immersing depths are obtained under different incident wave conditions.

关键词： Immersed tunnel time-domain response cable tension boundary element method