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Structure Character of M-A Constituent in CGHAZ of New Ultra-Low Carbon Bainitic Steel under Laser Welding Conditions

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Journal of Materials Science & Technology 2006年第3期22卷 382-386页

作者： Lin ZHAO Wuzhu CHEN wudong ZHANG Jiguo SHAN Department of Mechanical Engineering Tsinghua University Beijing 100084 China Key Laboratory for Advanced Materials Processing Technology Ministry of Education Tsinghua University Beijing 100084 China

800 MPa grade new ultra-low carbon bainitic （NULCB） steel is the recently developed new generation steel. The microstructure in the coarse-grained heat affected zone （CGHAZ） of NULCB steel under laser welding conditions was investigated by thermal simulation. The influence of the cooling time from 800℃ to 500℃.t8/5 （0.3-30 s）, on the microstructure of the CGHAZ was discussed. The experimental results indicate that the microstructnre of the CGHAZ is only the granular bainite which consists of bainitic ferrite （BF） lath and M-A constituent while t8/5 is 0.3-30 s. The M-A constituent consists of twinned martensite and residual austenite, and the change of the volume fraction of the residual austenite in the M-A constituent is very small when t8/5 is between 0.3 and 30 s. The morphology of the M-A constituent obviously changes with the variation of t8/*** t8/5 increases, tile average width, gross and shape parameter of the M-A constituent increase, while the line density of the M-A constituent decreases.

关键词： Laser welding New ultra-low carbon bainitic steel Coarse-grained heat-affected zone Microstructure M-A constituent

Electrochemical Studies of Eight New Divalent Transition Metal Benzenesulphonate Ternary Complexes with 1,10-Phenanthroline

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Chemical Research in Chinese Universities 2004年第6期20卷 694-697页

作者： LUYao GUOLi-ping MAJian-fang YANGJin wudong-mei FacultyofChemistry NortheastNormalUniversityChangchun130024China CollegeofChemistry＆Pharmocology JiamusiUniversityJiamusi154002China

The electrochemical properties of eight new divalent transition metal benzenesulphonate complexes with 1,10-phenanthroline in different solvents and supporting electrolytes were investigated by means of cyclic voltammetry(CV). Based on the CV data the influences of various coordination modes on the electrochemical behavior of the complexes were discussed. The diffusion coefficient D c and rate constant k s of those complexes in DMF systems were estimated according to CV and the results show that these processes were all quasi-reversible.

关键词： Benzenesulphonate 1,10-Phenanthroline Transition metal complex Cyclic voltammetry

Integrinβ1 asODN-inhibition of Cell Attachment and Invasion of the Human Gastric Cancer Cell Une SGC7901

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Chinese Journal of Clinical Oncology 2005年第1期2卷 496-499,504页

作者： wudong YuehongCui HuimianXu DepartmentofOncology FirstHospitalChinaMedicalUniversityShenyang110001China DepartmentofChemotherapy TreatmentCenterZhongshanHospitalaffiliatedwithFudanUniversityShanghai200052China

OBJECTIVE To study the inhibition of adhesion and invasion of SGC7901 cells into the ECM by integrinβ1 antisense oligodeoxynucleotide *** asODN and control ODN were transfected into SGC7901 cells using liposomes as vectors. The distribution of the ODN was followed by immunochemistry and changes in the expression of integrinβ1 mRNA and protein were determined by RT-PCR and FCM, respectively. The adhesion and invasion into the ECM were measured by the MTT and Boyden chamber methods, *** Integrinβ1 asODN which was transfected into SGC7901 cells distributed evenly in the cytoplasm and nucleus. PCR and FCM revealed a weakened band at 489bp and a left-shift curve, respectively. Adhesion and invasion assays showed decreased activity with an inhibition rate of 54% and 76%. The extent of decrease induced by integrinβ1 asODN was larger than that caused by random control ODN (P<0.001).CONCLUSION Transfection of integrinβ1 asODN into SGC7901 cells induced a decrease in the expression of integrinβ1 mRNA and protein,resulting in a decrease in adhesion and invasion into the ECM, with a greater effect than random control ODN.

关键词：整合蛋白β1 细胞功能胃癌 SGC7901 肿瘤细胞

Two Fractal structures of methyl—modified silica gels by SAXS

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Chinese Physics B 2003年第4期12卷 462-463页

作者： XuYao LiZhi-Hong FanWen-Hao wudong SunYu-Han WangJun StateKeyLaboratoryofCoalConversion ShanxiInstituteofCoalChemistryChineseAcademyofSciencesTaiyuan030001China LaboratoryofSynchrotronRadiation InstituteofHighEnergyPhysicsChineseAcademyofSciencesBeijing100039China

Development and Potential of Space-Borne Doppler Wind Lidar

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Journal of Ocean University of Qingdao 2003年第1期2卷 89-94页

作者： LIUZhishen SUNDapeng wudong JuergenStreicher InesLeike OceanRemoteSensingLaboratoryoftheMinistryofEducationofChina OceanRemoteSensingInstituteOceanUniversityofChinaQingdao266003P.R.China DeutschenZentrumfiirLuft-undRaumfahrt（DLR） Germany

The advantage of lidar over other wind sensors is presented in this paper. With more than 20 years research, the development of the space-borne wind lidar is reviewed. Longer-term investigation has made many technologies suitable for the wind lidar measurement from an orbital platform become mature. However, there are still some problems to be solved. In order to obtain the optimal performance in wind detection, great importance is being attached to the simulation of a virtual space-borne wind lidar system on computer as developed by NASA and ESA.

关键词： wind lidar space-borne lidar incoherent backscattering signal

Formation of the Moving Analogy Target with C++ Language in TV Tracking Equipment

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Semiconductor Photonics and Technology 2003年第1期9卷 62-64页

作者： NIUYan－xiong wudong－sheng 等 Dept.ofOpt.＆Electron.Eng. ShijiazhuangOrdnaceEng.InstituteShijiazhuang050003CHN Optoelectron.Inform.Sci.andTechnol.Lab.CollegeofPrecisionInstrumentandOptoelecton.Eng. TianjinUniversity

Moving analogy target is a key component of the performance testing system in TV tracking equipment. A new method is provided to produce the moving analogy target whose motion speed, track, contrast and size can be varied. The video signal transformed by video switching card is used to test the performances of the electronic box of TV tracking equipment. These performances include minimal tracking contrast, minimal size of tracking target, maximal tracking speed and capture time.

关键词： TV tracking equipment moving analogy target C+ + language

In Vitro and in Vivo Study of the Antitumor Effects of a THANK Modified Hepatoma Cell Line

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The Chinese-German Journal of Clinical Oncology 2002年第2期1卷 78-83页

作者： wudong SHENFeng 等 EasternHepatobiliarySurgeryHospital SecondMilitaryMedicalUniversityShanghai200438

Objective THANK, known as a member of TNF superfamily, is a potent costimulator of both B and T lymphocytes and can promote astrong immune response. To investigate its role in liver immunotherapy, the anti-tumor effects of the THANK-transduced hepatoma cellline SMMU-7721 in vitro and in vivo were *** THANK full-length cDNA was transfected into SMMU-7721 cell line. The transfectant with stable expression of THANK wasobtained by clone selection and THANK s effects on hepatoma cells were analyzed, further the tumorigenicity of THANK-transduced7721 cells was examined in nude *** THANK's expression in 7721 cells inhibited the growth of hepatoma cells and induced a strong CTL response in vitro. The cellcycle analysis showed that THANK transfected 7721 cells were arrested in the S phase. The expression of THANK in SMMU-7721 cellline not only inhibited the tumorigenicity of 7721 cells, but also induced a systemic immune response against re-challenge of parental7721 *** THANK transduction in SMMU-7721 cells can induce an effective immune response in nude mice and may be useful for theimmunotherapy of hepatomas.

关键词： TNF superfamily hepatoma THANK

The Effect of Mutant Inhibitor of Caspase-ActivatedDNase on Apoptosis Induced by Staurosporine

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Wuhan University Journal of Natural Sciences 2004年第3期9卷 397-398页

作者： ZhangWen ZhangBai-fang PengFang-fang wudong-cheng SchoolofMedicine WuhanUniversityWuhan430071HubeiChina

The Relationship Between Temperature & Sunshine and Spring-Sown Wheat Quality

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Agricultural Sciences in China 2003年第12期2卷 1329-1337页

作者： CAOGuang-cai wudong-bing SUNQun QIANGXiao-lin CHENHe-qin DONGMei KOUHao WANGJian-lin HOULi-bai LIMeng InstituteofCropBreedingandCultivation ChineseAcademyofAgriculturalSciencesBeijing100081P.R.China DepartmentofSeedScienceandTechnology ChinaAgriculturalUniversityBeijing100094P.R.China AgriculturalInstitute TibetanAcademyofAgriculturalandAnimalSciencesLasa850002P.R.China ShenyangAgriculturalUniversity Shenyang11o161P.R.China AgriculturalSciencesInstituteofTibetanRikazePrefecture Rikaze857000P.R.China AgriculturalandAnimalCollegeofTibet Linzhi860000P.R.China ChinaNationalBureauofMeteorology Beijing100081P.R.China

In order to study the relationship between temperature & sunshine and spring-sown wheat qua lity, a spring-sown experiment with 3 wheat varieties was conducted in Rikaze, Lasa, Linzhi, Beijing and Shenyang from 1998 to 2001. The results indicated that significant difference on some quality characteristics of experimental wheat varieties were observed from different locations and different years. The results also showed: protein content was positively correlated with wet gluten content, falling number, the average day temperature and sunshine hours from heading to maturation; and negatively correlated with the growing days and the average diurnal temperature difference from sowing to maturation; wet gluten content was positively correlated with the average day temperature and sunshine hours during the same period. Sedimentation value and falling number were positively correlated with the average sunshine hours from sowing to maturation. The basic way of wheat production in Tibet was as follows: mainly developing medium gluten wheat varieties, suitably planting weak gluten wheat varieties, introducing some inland excellent varieties.

关键词： Temperature Sunshine Spring-sown wheat Quality Correlation