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A rare case of bile duct cyst

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World Journal of Gastroenterology 2009年第20期15卷 2550-2551页

作者： Qing-gang Wang shu-Tian Zhang Department of Gastroenterology Beijing Friendship Hospital Affiliated to Capital Medical University Beijing 100050 China

Choledochal cyst is an uncommon disease usually seen in young women and can be divided into five types. We report a 66-year-old woman who was diagnosed with types and bile duct cyst simultaneously after surgery, which... 详细信息

关键词： Choledochal cyst Common bile duct Cholangiography

Stellar and HI Mass Functions Predicted by a Simple Preheating Galaxy Formation Model

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Chinese Journal of Astronomy and Astrophysics 2007年第4期7卷 590-594页

作者： Zhi-Jian Luo Cheng-gang shu Department of Physics Jiangxi Normal University Nanchang 330022 Joint Center for Astrophysics Shanghai Normal University Shanghai 200234 Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030

According to the new preheating mechanism of galaxy formation suggested by Mo et al., we construct a simple model of formation of disk galaxies within the current paradigm of galaxy formation. It incorporates preheating, gas cooling, bulge formation and star for- mation. The predicted stellar and HI mass functions of galaxies are discussed and compared with the observations. It is found that our model can roughly match both the observed galaxy luminosity function and the observed HI-mass function.

关键词： galaxies: halos - galaxies: formation - galaxies: bulges - galaxies: cooling flows

Electron gun for SSRF

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Nuclear Science and Techniques 2003年第1期14卷 20-23页

作者： SHENG shu-gang LIN Guo-Qiang 等 ShanghaiNationalSynchrotronRadiationCenter ShanghaiInstituteofNuclearResearchTheChineseAcademyofSciencesShanghai201800 ShanghaiNationalSynchrotronRadiationCenter ShanghaiInstitute

A 100 kV triode-electron-gun has been designed and manufactured for the Linac of Shanghai Synchrotron Radiation Facility (SSRF). In this paper the performance of the gun and some key components are described.

关键词： SSRF 上海同步辐射装置电子枪 EGUN 电子束测量装置离子泵浦 EIMAC

Tetraarsenic Tetrasulfide Induced Colon Cancer ls174t Cells Apoptosis

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Chemical Research in Chinese Universities 2009年第2期25卷 193-197页

作者： GUO Xing-gang DONG Xin-shu CHEN Jie The Affiliated Tumor Hospital of Harbin Medical University Harbin 150040 P. R. China

To explore the functional mechanism of tetraarsenic tetrasulfide（As4S4） against the growth and proliferation of colon cancer cells ls174t, MTT method was used to observe the functions of tetraarsenic tetrasulfide for the inhibition of cells ls174t in vitro. Transmission electron microscope was used to observe cell morphologies. FCM assay was performed to measure the change of cell cycle. RT-PCR method was used to detect the expressions of bcl-2 and bax mRNA. Westernblot method was used to detect the expressions of bcl-2 and bax protein. Tetraarsenic tetra- sulfide showed an inhibiting effect on the proliferation of cells ls174t in vitro（P〈0.01）. It induces the apoptosis of cells ls174t, which is related to the decrease in the expression of bcl-2 and the increase in the expression of bax.

关键词： Tetraarsenic tetrasulfide As484 Colon cancer Tumor cell Cell apoptosis

Mechanical properties and kinetics of thermally aged Z3CN20.09M cast duplex stainless steel

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International Journal of Minerals,Metallurgy and Materials 2018年第10期25卷 1148-1155页

作者： Tong-hua Liu Wei Wang Wen-jiang Qiang Guo-gang shu School of Materials Science and Engineering University of Science and Technology Beijing School of Materials Science and Engineering Jiangxi University of Science and Technology State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment China Nuclear Power Engineering Co. Ltd.

Cast stainless steels used in nuclear power plants suffer from fracture toughness losses owing to thermal aging after long-term service at temperatures ranging from 280–320°C. To study the thermal aging embrittlement of Z3 CN20.09 M duplex stainless steel produced in China, accelerated thermal aging experiments were carried out at 350, 380, and 400°C for up to 10000 h. Microhardness and Charpy impact energies were measured at different aging times. The microhardness of ferrite increased drastically over the initial aging time of 2000 h at 380 and 400°C and then slowly reached HV0.01 560. In contrast to this observed change in microhardness, Charpy impact energies sharply decreased after initial aging and then gradually reached a minimum value. Taking the microhardness of the ferrite phase as the parameter describing the thermal kinetics of the stainless steel samples, the activation energy of thermal aging was calculated to be 51 kJ/mol. Correlations between the thermal aging parameter, P, and ferrite microhardness and between P and Charpy impact energy were also analyzed. The results showed that the activation energy calculated from the ferrite microhardness is much more reasonable than that obtained using other parameters, such as chemical composition and impact energy.

关键词： stainless steel thermal aging embrittlement activation energy microhardness Charpy impact energy

DYNAMIC RESPONSE ANALYSIS OF DDMS PLATFORM SUBJECTED TO ACTIONS OF WAVE GROUPS AND CURRENT FOURCES

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Journal of Hydrodynamics 2011年第6期23卷 697-708页

作者： SUN Zhao-chen WANG Xing-gang LIANG shu-xiu LIU shu-Xue LIU Si State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024China

Coupled dynamic analysis of the Deep Draft Multi-Spar （DDMS） platform and the mooring system under the action of waves and current is carried out in the time domain. Using a geometrically nonlinear finite element method, the mooring-line dynamics is simulated based on the total Lagrangian formulation. Wave groups are obtained by the JONSWAP spectrum and an empirical wave envelope spectrum involving two envelope-based factors Group Height Factor （GFH） and Group Length Factor （GLF）. The results show that the wave groups have a significant effect on the motion responses of the platform and the mooring line tensions.

关键词： Deep Draft Multi Spar (DDMS) platform dynamic response wave groups current fources

Characteristics of transmitting channel wave in a coal seam

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Mining Science and Technology 2009年第3期19卷 331-336页

作者： YANG Zhen GE Mao-chen WANG shu-gang School of Mines China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China College of Earth and Mineral Scienc The Penn State University PA 16802 USA

An embedded underground coal seam carries channel waves of low seismic velocity along a stratigraphic rock-coal-rock *** a homogeneous and isotropic seam, seismic waves propagate as trapped waves within the seam, which leads to propagation of channel *** describe how to set up a field test for transmission in order to acquire channel waves in a coal *** channel wave signals are non-stationary in their frequencies and amplitudes, a necessary velocity spectrum and wavelet transformation analysis are applied to interpret the characteristics of channel *** advantage of using a wavelet transformation is that different resolutions can be obtained at different times and different *** to analysis of the seismic signals acquired in the S7 sensor hole, it was clearly shown that the characteristics of channel waves are lower frequencies and attenuation which can guide an effective wave for detecting voids, boundaries and faults in coal seams with strong roofs and floors.

关键词： in-seam seismic technique channel wave coal seam time-frequency domain Gabor wavelet velocity spectrum

Molecular cloning and ontogenesis expression of fatty acid transport protein-1 in yellow-feathered broilers

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Journal of Genetics and Genomics 2008年第6期35卷 327-333页

作者： Yuzhen Song Jiaying Feng Lihua Zhou gang shu Xiaotong Zhu Ping Gao College of Animal Science South China Agricultural University Guangzhou 510642 China

Fatty acid transport protein-1 （FATP-1） is one of the important transporter proteins involved in fatty acid transmembrane transport and fat deposition. To study the relationship between FATP-1 mRNA expression and fat deposition, chicken （Gallus gallus） FATP-1 sequence was first cloned by rapid amplification of cDNA ends （RACE）. Tissue samples of chest muscle, leg muscle, subcutaneous fat, and abdominal fat were collected from six male and six female broilers each, at 22 days, 29 days, and 42 days, respectively. The tissue specificity and ontogenesis expression pattern of the FATP-1 mRNA of yellow-feathered broilers was studied by real-time reverse transcription polymerase chain reaction （RT-PCR）, and the fat deposition laws in different tissues were also compared. A 2,488 bp cDNA sequence of chicken FATP-1 was cloned by RACE （GenBank accession no. DQ352834）, including 547 bp 3＇ end untranslated region （URT） and 1,941 bp open reading frame （ORF）. Chicken FATP-1 encoded 646 amino acid residues, which shared 83.9% and 83.0% identity with those of human and rat, respectively. The results of quantitative PCR demonstrated a constant FATP-1 mRNA expression level in the chest muscle and subcutaneous fat of both male and female broilers at three stages, whereas the expression level of the FATP-1 mRNA in the leg muscle at 42 days was significantly higher than that at 22 days or 29 days. In the abdominal fat of male broilers, the gene expression significantly increased with age, whereas the female broilers showed a dramatic downregulation of FATP-1 expression in abdominal fat at 42 days. This suggested a typical tissue-and gender-specific expression pattern of chicken FATP-1, mediating the specific process of fatty acid transport or utilization in muscle and adipose tissues.

关键词： yellow-feathered broiler FATP-1 RACE quantitative PCR fat deposition

Microstructure and mechanical properties of Al-B4C composite at elevated temperature strengthened with in situ Al2O3 network

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Rare Metals 2020年第6期39卷 671-679页

作者： Shang-Yang Feng Qiu-Lin Li Wei Liu Guo-gang shu Xin Wang Graduate School at Shenzhen Tsinghua UniversityShenzhen 518055China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Sate Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment China Nuclear Power Engineering Co.Ltd.Shenzhen 518172China China Nuclear Powder Design Co. Ltd.Shenzhen 518057China

This study evaluated the mechanical properties and thermal properties of Al-12 vol%B4 C composite at elevated temperature strengthened with in situ Al2 O3 *** composite was fabricated using powder metallurgy(PM)with raw materials of fine atomized aluminum powders,and the associated microstructures were *** 350℃,the composite had ultimate tensile strength of UTS=137 MPa,yield strength of YS0.2=118 MPa,and elongation ofε=4%.Besides,the mechanical properties of the composite remained unchanged at 350℃after the long holding periods up to 1000 *** excellent mechanical properties and thermal stability at 350℃were secured by in situ am-Al2O3 network that strengthened the grain *** interfacial debonding and brittle cracking of B4 C particles were the main fracture mechanisms of the *** addition,the influence of sintering temperature and rolling deformation on the microstructures and mechanical properties was studied.

关键词： Al-B4C Alumina(Al2O3) Composite Mechanical properties Microstructure