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Comparison of efficacy and safety of transpancreatic septotomy, needle-knife fistulotomy or both based on biliary cannulation unintentional pancreatic access and papillary morphology

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Hepatobiliary & Pancreatic Diseases International 2019年第1期18卷 73-78页

作者： Jun Wen Tao Li yi Lu Li-ke Bie Biao Gong Digestive Endoscopy Center Department of Gastroenterology Ruijin Hospital Shanghai Jiaotong University School of Medicine Digestive Endoscopy Center The Sixth Affiliated Hospital of Sun Yat-sen University

Background: Precut sphincterotomy has been widely performed to facilitate selective biliary access when standard cannulation attempts failed during endoscopic retrograde cholangiopancreatography(ERCP). However, scarce data are available on different precut techniques for difficult biliary cannulation. This study aimed to evaluate the efficacy and safety of transpancreatic septotomy(TPS), needle-knife fistulotomy(NKF) or both based on the presence of unintentional pancreatic access and papillary morphology. Methods: Between March 2008 and December 2016, 157 consecutive patients undergoing precutting for an inaccessible bile duct during ERCP were identified. Precut techniques were chosen depending on repetitive inadvertent pancreatic cannulation and the papillary morphology. We retrospectively assessed the rates of cannulation success and procedure-related complications among three groups, namely TPS, NKF, and TPS followed by NKF. Results: The baseline characteristics of the three groups were comparable. The overall success rate of biliary cannulation reached 98.1%, including 111 of 113(98.2%) with TPS, 35 of 36(97.2%) with NKF and 8 of 8(100%) with NKF following TPS, without significant difference among groups. The incidences of total complications and post-ERCP pancreatitis were 9.6% and 7.6%, respectively. There was a trend towards less frequent post-ERCP pancreatitis after NKF(0%) compared with 11 cases(9.7%) after TPS and one case(12.5%) after NKF following TPS, but not significantly different( P = 0.07). No severe adverse event occurred during this study period. Conclusions: The choice of precut techniques by the presence of unintended pancreatic access and the papillary morphology brought about a high success rate without increasing risk in difficult biliary cannulation.

关键词： Difficult biliary cannulation Endoscopic retrograde cholangiopancreatography Needle-knife fistulotomy Precut techniques Transpancreatic septotomy

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Evolution of sedimentary facies and fossil communities in the Middle Permian Maokou Formation in Zigui County, Hubei Province,South China

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Journal of Palaeogeography 2018年第1期7卷 48-57页

作者： ke-Yu Zhu Tan Wang Zhi-Xing yi Yong-Biao Wang State key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences China University of GeosciencesWuhan

A geological event that happened at the end of the Middle Permian resulted in different levels of erosion in a shallow-water platform of South China, which led to diverse geological records in different sections. The Lianziya section in western Hubei Province of South China has a well-exposed stratigraphic sequence of the late Middle Permian rocks with abundant fossils and sedimentary facies types, providing new evidences for understanding the evolution of marine biota and environment in the late Middle Permian. Our study shows that four fossil communities can be recognized with the change of sedimentary facies in the late Middle Permian: Foraminiferal-algal community, phylloid algal community, bryozoan community and Ungdarella community. The foraminiferal-algal community is dominated by fusulinids and calcareous algae, but was soon replaced by the phylloid algal community. With an increase of terrestrial input, the phylloid algal community was again replaced by the bryozoan community. Near the end of the Middle Permian, with a decrease of terrestrial input, the bryozoan fossil community disappeared while the Ungdarella community became dominant. A 10 cm-thick weathered crust occurred at the top of the Middle Permian limestone, marking a large amplitude fall in sea-level and the beginning of a terrestrial erosion stage. The sedimentary facies and fossil community changes in the Lianziya section indicates that the Middle Permian crisis was a gradual process while the sea-level fall mainly occurred in the latest Middle Permian.

关键词： Fossil community Sedimentary facies Middle Permian Guadalupian Capitanian-Wuchiapingian Zigui County Hubei Province

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Role of Soybean GmbZIP132 under Abscisic Acid and Salt Stresses

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Journal of Integrative Plant Biology 2008年第2期50卷 221-230页

作者： Yong Liao Jin-Song Zhang Shou-yi Chen Wan-ke Zhang National key Laboratory of Plant Genomics Institute of Genetics and Developmental Biology the Chinese Academy of Sciences Beijing 100101 China

Plant basic-leucine zipper （bZlP） transcription factors play important roles in many biological processes. In the present study, a bZlP gene, GmbZIP132, was cloned from soybean and its biological function under abiotic stresses was studied. The transcription of GmbZIP132 was induced by drought and high salt treatments. Among all of the organs analyzed, its expression was the highest in cotyUedon and stems. GmbZIP132 could weakly bind to the GCN4-1ike motif （GLM）（5＇-GTGAGTCAT-3＇） in yeast one-hybrid assay. Compared with wild-type （WT） Arabidopsis plants, transgenic plants overexpressing GmbZlP132 showed reduced abscisic acid sensitivity and increased water loss rate. At the stage of germination, transgenic plants were more tolerant to salt treatment than wild-type plants. The expression of some abiotic stress-related genes, such as rd29B, DREB2A, and PSCS, were upregulated in the transgenic plants. These results indicated that GmbZlP132 was an abioUc stress-related gene, and its overexpression could increase the salt tolerance of transgenic Arabidopsis plants during germination, yet no significant difference of tolerance to abiotic stresses was found between transgenic and wild type plants at the seedling stage.

关键词： abiotic stresses basic-leucine zipper soybean.

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Dispersion behavior of core-shell silica-polymer nanoparticles

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China Particuology 2007年第4期5卷 300-304页

作者： yi Wang Yangchuan ke Jingzi Li Shouqin Du Yanfeng Xia State key Laboratory of Heavy Oil Processing China University of Petroleum No. 18 Fuxue Road Changping 102249 Beijing PR China

Core-shell silica nanoparticles are superior in modifying surface wetting behavior, enhancing nucleation and growth in crystallization, improving dispersion of naked nanoparticles, and thus upgrading the overall properties of organic polymers. The dispersion behavior and morphology of monodisperse core-shell silica particles in several polymers including polyesters are reviewed and their potential applications are discussed.

关键词： Core-shell SiO2 Nanoparticles Preparation Dispersion Application

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Hot Deformation Behavior of an Ultra-High-Strength Fe–Ni–Co-Based Maraging Steel

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Acta Metallurgica Sinica(English Letters) 2019年第9期32卷 1161-1172页

作者： Le Zhang Wei Wang M. Babar Shahzad yi-yin Shan ke Yang Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Hot processing behavior of an ultra-high-strength Fe–Ni–Co-based maraging steel was studied in temperature range of 900–1200℃and strain rate range of 0.001–10 s^-*** processing parameters and optimum hot working window were characterized via flow stress analysis,constitutive equation construction,hot processing map calculation and microstructure evolution,*** strain value for dynamic recrystallization was determined through theoretical mathematical differential method:the inflection point ofθ–σand-αθ/ασ-σ*** was found that the flow stress increased with the decrease in deformation temperature and increase in the strain *** power dissipation maps in the strain range of 0.1–0.6 were entirely similar with the tendency of contour lines which implied that strain had no strong effect on the dissipation ***,the instability maps showed obvious strain sensitivity with increasing strain,which was ascribed to the flow localization and *** optimized hot processing window of the experimental steel was obtained as 1100–1200℃/0.001–1 s^-1 and 1000–1100℃/0.001–0.1 s^-1,with the efficiency range of 20–40%.Owing to high Mo content in the experimental steel,high dynamic activation energy,Q=439.311 kJ mol^-1,was achieved,indicating that dynamic recrystallization was difficult to occur in the hot deformation process,which was proved via microstructure analysis under different hot deformation conditions.

关键词： Maraging steel Hot working Dynamic recrystallization Constitutive equation Hot processing map

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A Gγallele makes alkaline tolerance real

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Journal of Integrative Agriculture 2023年第9期22卷 2917-2919页

作者： ZHANG Wan-ke CHEN Shou-yi ZHANG Jin-song State key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101P.R.China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100049P.R.China

Along with the increase in the population,the requirements for increased human food and animal feed production have been boosted *** an urgent food demand requires more arable land for crop *** cope with these urgent ... 详细信息

关键词： alkaline urgent arable

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Long-term outcomes of endoscopic papillary balloon dilation for removal of bile duct stones in Billroth Ⅱ gastrectomy patients

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Hepatobiliary & Pancreatic Diseases International 2018年第3期17卷 257-262页

作者： Tao Li Jun Wen Li-ke Bie yi Lu Biao Gong Department of Gastroenterology Digestive Endoscopy Center Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin Er Road Shanghai 200025 China Digestive Endoscopy Center The Sixth Affiliated Hospital of Sun Yat-sen University Guangzhou 510655 China

Background： Endoscopic papillary balloon dilation （EPBD） for common bile duct （CBD） stones removal in Billroth II gastrectomy patients is feasible. However, the long-term outcomes of this technique are notclear. The aim of this study was to evaluate the procedural and long-term outcomes of EPBD for removal of CBD stones in Billroth II gastrectomy patients.

关键词： Endoscopic retrograde cholangiopancreatography Endoscopic papillary balloon dilation Common bile duct stonesBillroth II gastrectomy

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Ultrafine-grained Ti6Al7Nb-xCu alloy with ultrahigh strength and exceptional biomedical properties

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Journal of Materials Science & Technology 2023年第33期164卷 68-78页

作者： yi Li Hai Wang Konrad Koenigsmann Hui Liu Shuyuan Zhang Ling Ren ke Yang Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China University of Chicago ChicagoIL 60637USA Binzhou Institute of Technology Shandong Key Laboratory of Advanced Aluminum Materials and TechnologyBinzhou 256606China

Grain refinement has been found to be able to improve the strength of metals without reducing their plasticity or *** this work,ultrafine-grained Ti6Al7Nb-xCu(x=0,3 wt%,6 wt%,9 wt%)alloys were fabricated based on the clinically used Ti6Al7Nb alloy via Cu alloying fabrication strategy combined with dynamic recrystallization(DRX)from martensite during hot *** results indicate that Cu alloying is not only effective in reducing the width of martensite laths after quenching in theβphase region but also increases the nucleation rate of DRX during the high-temperature ***,the Ti2Cu phase that precipitates from the matrix can pin the grain boundaries and inhibit their growth during the high-temperature *** optimal Cu concentration of Ti6Al7Nb-xCu alloy is determined to be 6 wt%,and the optimal deformation temperature is determined to be 750°*** this Cu content and deformation temperature,the grain size is only 270 nm,the tensile strength is up to 1266±10 MPa,and the elongation is 17%.Compared with the commercial Ti6Al7Nb alloy,the ultrafine-grained Ti6Al7Nb-6Cu alloy has better overall mechanical properties,good biocompatibility,and unique antibacterial *** work provides a theoretical basis for fabricating the new antibacterial titanium-based alloys with high strength.

关键词： High strength titanium alloy Ultrafine grain Antibacterial Dynamic recrystallization

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A novel biodegradable high nitrogen iron alloy with simultaneous enhancement of corrosion rate and local corrosion resistance

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Journal of Materials Science & Technology 2023年第21期152卷 94-99页

作者： Sihan Lu Qingchuan Wang yi Zhang Huabing Li Hao Feng Lili Tan ke Yang School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China Yangtze Pilot-Line Services Co. LtdWuhan 430073China School of Metallurgy Northeastern UniversityShenyang 110819China

To improve the corrosion rate and suppress the local corrosion,a novel biodegradable high nitrogen(N)FeMnN alloy was developed,and the effects of N content on the corrosion behaviors were systematically *** was found that,as the N content increased,the corrosion rate was significantly enhanced in both Hank’s solution and simulated gastric ***,as the N content increased,the size and depth of pits decreased obviously,and the number of pits increased,which presented a more uniform corrosion morphology.X-ray photoelectron spectroscopy(XPS)results indicated that N existed in the form of NH_(4)^(+) in the corrosion products and[FeN]clusters in the ***[FeN]clusters would simultane-ously improve the corrosion rate and suppress the local corrosion,which provides a new perspective for the development of biodegradable Fe alloy.

关键词： Biodegradable Iron alloy High nitrogen Corrosion rate Local corrosion

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NFSI-catalyzed S–S bond exchange reaction for the synthesis of unsymmetrical disulfides

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Chinese Chemical Letters 2022年第9期33卷 4269-4272页

作者： Mengjie Song Qingyue Hu Zheng-yi Li Xiaoqiang Sun ke Yang Jiangsu key Laboratory of Advanced Catalytic Materials&Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Institute of Urban&Rural Mining Changzhou UniversityChangzhou 213164China

The metal-free S–S bond exchange reaction of symmetrical disulfides catalyzed by NFSI is described. This novel protocol provides a facile and efficient approach to accessing important unsymmetrical ***, this strategy could also be utilized in the late-stage functionalization of amino acids, drugs,and natural products. The broad substrate scope, good functional group tolerance and easy accessibility of catalyst indicate that this strategy affords a green and practical complementary method to various unsymmetrical disulfides.

关键词： Metal-free Ssingle bond S bond exchange NFSI Unsymmetrical disulfides Organic synthesis

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