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中国动物学会寄生虫学专业委员会第十三次全国学术会议暨第四次国际寄生虫学学术研讨会

作者： Guo-Hui Zhu Ji-Xuan Luo Hong-juan peng Department of Pathogen Biology School of Public Health and Tropical Medicine Southern Medical University

Toxoplasma gondii is an intracellular protozoa which can infect almost all kinds of nucleated *** is estimated that approximately 1/3 of the world’s population to be chronically infected with tissue cysts of this *** dwells inside a parasitophorous vacuole(PV)for development and multiplication after *** of the PV membrane(PVM)components come from the host membrane with only a small part from the parasite and host *** small GTPases Rho A,Rac1 and Rac2 were found recruited in the formation of PVM upon *** RH and Pru tachyzoites invasion to COS 7 cells and this involvement is dependant on the normal GTPase *** phenomena were testified by using over expression of Cyan Fluorescent Protein(CFP)tagged wild type Rho A,Rac1 and Rac2;Dominant Negative mutants of Rho N19,Rac1 N17 and Rac2N17;and constitutively active mutants of Rho A L63,Rac1 L61 and Rac2 L61 in COS7cells,and then infected with *** RH *** the wild type Rho A,Rac1and Rac2 were found involved in the *** 10 amino acids sequentially truncated Rho A mutants were used for the identification of the motif(s)of Rho A to decide the efficient recruitment into the *** enzymatic activity site deletion mutants Rho A D11-20 and Rho A D61-70 were found loosing the ability of being involved in *** chemotractant Epithelial Growth Factor(EGF)was used to activate Rho A WT transfected COS7 *** translocation of CFP tagged Rho A WT towards EGF in COS7 cells was not found for the protein recruited in the *** the contrary,the translocation was found for the protein in the host cell membrane and *** result implicated the Rho A recruited in PVM was isolated form the actomyosin *** infection rate and infetioncity of *** to host cells were compared among different group of COS7 cells:(A)mock;(B)Rho A WT over expression;(C)Rho N19over expression;(D)Rho A L63 over expression;(F)Rho A knocked-down with *** A WT over expre

关键词： Toxoplasma gondii Parasitophorous Vacuole RhoA Rac1 Rac2 GTPase

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Metal complexes of bipyridine-functionalized covalent organic frameworks as efficient electrocatalysts for oxygen evolution reaction

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Rare Metals 2024年第7期43卷 3096-3106页

作者： Zhuang-Zhuang Wu Tian Xia Ying Liang Yong-peng Li Zhu-Yin Sui Li-juan Feng Dao-Xiong Wu Xin-Long Tian Qi Chen State Key Laboratory of Marine Resource Utilization in South China Sea School of Marine Science and EngineeringHainan UniversityHaikou 570228China School of Chemistry and Chemical Engineering Yantai UniversityZhuhai519041China School of Bioengineering Zhuhai Campus of Zunyi Medical UniversityZhuhai519041China

Electrocatalytic water splitting is considered a clean and practic al method for producing *** this study,COF-Bpy,a bipyridine-functionalized covalent organic framework(COF),was prepared via post-synthetic modification,after which electrocatalysts for the oxygen evolution reactions(OER)were formed through coordination to single-or double-transition metals(Fe,Co,Ni,FeCo,FeNi or CoNi).COF-Bpy@FeNi delivered the best OER performance among the studied electrocatalysts,with an overpotential of 399 mV at 10 mA·cm^(-2)in an alkaline electrolyte(1.0 mol·L^(-1)KOH aqueous).Notably,the electrocatalytic performance of COF-Bpy@FeNi showed slight degradation during durability testing,which is ascribable to its irreversible benzoquinoline structure and strong metal *** expected,COF-Bpy@FeNi exhibited a low overpotential of 347 mV at a turnover frequency(TOF)of 0.1 s^(-1),which suggests that COF-Bpy@FeNi possesses excellent intrinsic electroc atalytic OER ***,density functional theory(DFT)calculations reveal that the Ni site plays a major role,while the Fe site adjusts the electronic structure of the Ni ions,which rationalizes the excellent OER properties of COF-Bpy@*** study not only provides a simple and efficient method for complexing COFs with transition metals,but also offers a novel strategy for designing porous organic polymer electrocatalysts.

关键词： Covalent organic framework Oxygen evolution reactions(OER)electrocatalyst Nickel-iron synergy Water splitting

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Grain boundary engineering for enhancing intergranular damage resistance of ferritic/martensitic steel P92

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Nuclear Science and Techniques 2024年第5期35卷 186-199页

作者： Lei peng Shang-Ming Chen Jing-Yi Shi Yong-Jie Sun Yi-Fei Liu Yin-Zhong Shen Hong-Ya He Hui-juan Wang Jie Tian State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China School of Materials Engineering Shanghai University of Engineering Science333 Long Teng RoadShanghai 201620China Experimental Center of Engineering and Material Science University of Science and Technology of ChinaHefei 230026China

Ferritic/martensitic(F/M)steel is widely used as a structural material in thermal and nuclear power ***,it is susceptible to intergranular damage,which is a critical issue,under service *** this study,to improve the resistance to intergranular damage of F/M steel,a thermomechanical process(TMP)was employed to achieve a grain boundary engineering(GBE)microstructure in F/M steel *** TMP,including cold-rolling thickness reduction of 6%,9%,and 12%,followed by austenitization at 1323 K for 40 min and tempering at 1053 K for 45 min,was applied to the as-received(AR)P92 *** prior austenite grain(PAG)size,prior austenite grain boundary character distribution(GBCD),and connectivity of prior austenite grain boundaries(PAGBs)were *** to the AR specimen,the PAG size did not change *** fraction of coincident site lattice boundaries(CSLBs,3≤Σ≤29)and Σ3^(n) boundaries along PAGBs decreased with increasing reduction ratio because the recrystallization fraction increased with increasing reduction *** PAGB connectivity of the 6%deformed specimen slightly deteriorated compared with that of the AR ***,potentiodynamic polarization studies revealed that the intergranular damage resistance of the studied steel could be improved by increasing the fraction of CSLBs along the PAGBs,indicating that the TMP,which involves low deformation,could enhance the intergranular damage resistance.

关键词： Grain boundary engineering Ferritic/martensitic steel Prior austenite grain boundary character distribution Grain boundary connectivity Intergranular damage resistance

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Early postoperative complications after transverse colostomy closure,a retrospective study

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World Journal of Gastrointestinal Surgery 2024年第3期16卷 807-815页

作者： Fei Liu Xiao-juan Luo Zi-Wei Li Xiao-Yu Liu Xu-Rui Liu Quan Lv Xin-peng Shu Wei Zhang Dong peng Department of Gastrointestinal Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Endoscopy Center The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400012China

BACKGROUND Ostomy is a common surgery usually performed to protect patients from clinical symptoms caused by distal anastomotic leakage after colorectal cancer(CRC)surgery and perforation or to relieve intestinal *** To analyze the complications after transverse colostomy *** Patients who underwent transverse colostomy closure from Jan 2015 to Jan 2022 were retrospectively enrolled in a single clinical *** differences between the complication group and the no complication group were *** regression analyses were conducted to find independent factors for overall complications or incision *** A total of 102 patients who underwent transverse colostomy closure were enrolled in the current ***(68.6%)patients underwent transverse colostomy because of CRC related *** complications occurred in 30(29.4%)patients and the most frequent complication occurring after transverse colostomy closure was incision infection(46.7%).The complication group had longer hospital stays(P<0.01).However,no potential risk factors were identified for overall complications and incision *** The most frequent complication occurring after transverse colostomy closure surgery in our center was incision *** operation time,interval from transverse colostomy to reversal,and method of anastomosis might have no impact on the postoperative *** should pay more attention to aseptic techniques.

关键词： Transverse colostomy closure Surgery Complications A single clinical centre Risk factors

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Au Nanowires-MWCNTs修饰电极对葡萄糖的催化氧化

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高等学校化学学报 2017年第10期38卷 1864-1871页

作者：许凯歌张笛雷杰彭亚鸽彭娟晋晓勇宁夏大学化学化工学院省部共建煤炭高效利用与绿色化工国家重点实验室银川750021

通过油胺(Oleylamine)还原法制备了金纳米线(Au nanowires),将其与酸化处理的多壁碳纳米管(MWCNTs)通过层层组装制备了Au nanowires-MWCNTs复合结构修饰的玻碳电极(Au nanowires-MWCNTs/GCE).电化学研究结果表明,与单纯Au nanowires或MWCNTs修饰电极相比,Au nanowires-MWCNTs/GCE对葡萄糖表现出更优良的电催化性能.以Au nanowires-MWCNTs/GCE为阳极,电沉积Pt膜电极(Pt/GCE)为阴极,构建了葡萄糖/O2燃料电池.测试结果表明,构建的燃料电池的开路电位(OCP)为0.57 V,在0.44 V下最大功率密度(Pmax)为0.28 m W/cm2.

关键词：葡萄糖燃料电池金纳米线多壁碳纳米管

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敦煌数字壁画图像的数字水印保护研究

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敦煌研究 2009年第3期 103-106,130页

作者：彭涓刘刚兰州石化职业技术学院甘肃兰州730060 敦煌研究院数字中心甘肃兰州7362000

在当前数字化时代,如何保护数字敦煌壁画知识产权,成为一项不容忽视的重要课题。本文基于小波算法的数字水印技术的实现,研究了敦煌数字壁画数字水印版权保护技术实现方法,以期此项技术在敦煌数字壁画版权信息保护应用起到很好的作用。

关键词：敦煌壁画数字技术数字水印版权保护

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微型近红外光谱法快速检测赛买提杏糖度

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分析试验室 2023年第10期42卷 1285-1291页

作者：彭娟邵学广楚刚辉新疆特色药食用植物资源化学实验室喀什大学化学与环境科学学院喀什844000 南开大学化学学院分析科学研究中心天津300071

为实现赛买提杏糖度(SSC)的快速检测,并建立一个稳健的预测模型,本文使用微型近红外光谱仪采集光谱,数显糖度计测定SSC,对比了连续小波变换(CWT)、卷积平滑(SG)、多元散射校正(MSC)、标准正态变换(SNV)、一阶导(1st),二阶导(2nd)及其两... 详细信息

为实现赛买提杏糖度(SSC)的快速检测,并建立一个稳健的预测模型,本文使用微型近红外光谱仪采集光谱,数显糖度计测定SSC,对比了连续小波变换(CWT)、卷积平滑(SG)、多元散射校正(MSC)、标准正态变换(SNV)、一阶导(1st),二阶导(2nd)及其两两组合的光谱预处理方法建模结果,结果显示,CWT,CWT+MSC和CWT+SNV 3种方法结果较好。以这3种预处理方法为基础,对比了竞争自适应加权抽样(CARS)、随机化试验(RT)、蒙特卡罗-无信息变量消除法(MC-UVE)和C值法4种变量选择方法,分别得出与杏糖度相关的光谱变量,建立了赛买提杏糖度偏最小二乘(PLS)预测模型,经CWT+MSC光谱预处理加C值法变量选择建立的PLS模型最佳,其预测相关系数(Rp)从0.844优化到0.960,预测均方根误差(RMSEP)从1.273降低到0.699,相对分析偏差(RPD)从1.853上升到3.430。结果表明,适当光谱预处理和变量选择能有效提高赛买提杏糖度快速无损检测的效率和准确性。

关键词：赛买提杏变量选择近红外光谱糖度

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VSC-HVDC串并联型D-PMSG风电场机组功率—电压协调控制

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电机与控制学报 2017年第8期21卷 88-94页

作者：张文娟彭婧荣飞长沙学院电子信息与电气工程系湖南长沙410002 湖南大学电气与信息工程学院湖南长沙410082

针对串并联型D-PMSG风电场中同一串联簇机组在不同风速下最大功率追踪控制存在过电压、过调制问题,分析基于柔性直流输电的串并联型D-PMSG风电场机组的运行特性,提出一种适用于该拓扑型风电场机组的功率—电压协调最大功率追踪控制方法... 详细信息

针对串并联型D-PMSG风电场中同一串联簇机组在不同风速下最大功率追踪控制存在过电压、过调制问题,分析基于柔性直流输电的串并联型D-PMSG风电场机组的运行特性,提出一种适用于该拓扑型风电场机组的功率—电压协调最大功率追踪控制方法,并探讨直流母线电压上限值的设定原则。该方法不仅可以将同一串联簇中其他各机组直流母线电压都钳制在安全范围内,还减少限压期间下的机组的弃风。搭建相应的仿真模型,仿真结果表明所提出的方法可确保各机组在安全范围内寻找最佳功率点。

关键词：柔性直流输电串并联拓扑功率-电压协调控制直流母线电压上限值

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Evaluation of the effectiveness of preventive nursing measures for pressure injuries in patients in the neurology intensive care unit

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World Journal of Clinical Cases 2024年第19期12卷 3807-3814页

作者： Rong Zhang peng-Xin Ma juan-juan Zhang Intensive Medicine Department The First People’s Hospital of Jiangxia DistrictWuhan 430000Hubei ProvinceChina Department of Neurology The First People’s Hospital of Jiangxia DistrictWuhan 430000Hubei ProvinceChina

BACKGROUND Patients in neurology intensive care units(ICU)are prone to pressure injuries(PU)due to factors such as severe illness,long-term bed rest,and physiological *** not only causes pain and complications to patients,but also increases medical burden,prolongs hospitalization time,and affects the recovery *** To evaluate and optimize the effectiveness of pressure injury prevention nursing measures in neurology ICU *** A retrospective study was conducted,and 60 patients who were admitted to the ICU of the Department of Neurology were selected and divided into an observation group and a control group according to the order of admission,with 30 people in each *** observation group implemented pressure injury prevention and nursing measures,while the control group adopted routine *** Comparison between observation and control groups following pressure injury prevention nursing intervention revealed significantly lower incidence rates in the observation group compared to the control group at 48 h(8.3%vs 26.7%),7 d(16.7%vs 43.3%),and 14 d(20.0%vs 50.0%).This suggests a substantial reduction in pressure injury incidence in the observation group,with the gap widening over ***,patients in the observation group exhibited quicker recovery,with a shorter average time to get out of bed(48 h vs 72 h)and a shorter average length of stay(12 d vs 15 d)compared to the control ***,post-intervention,patients in the observation group reported significantly improved quality of life scores,including higher scores in body satisfaction,feeling and function,and comfort(both psychological and physiological),indicating enhanced overall well-being and comfort following the implementation of pressure injury prevention nursing *** Implementing pressure injury preventive care measures for neurology ICU patients will have better results.

关键词： Neurology intensive care units Pressure injury Preventive care Effect evaluation Optimization research Prognostic effect

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基于多约束条件的Ferry路由机制的研究

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北京理工大学学报 2013年第8期33卷 836-840页

作者：刘家康彭娟薛丽琴北京理工大学电子工程系现代通信实验室北京100081

针对偏远乡村网络的问题,结合Message Ferry机制,提出了基于多约束条件的Ferry路由机制(MCFR).该机制充分利用Ferry中所携带的数据包信息和节点位置信息计算Ferry到各个节点的评估值,通过评估值选择Ferry的下一跳.仿真结果表明,相对于... 详细信息

针对偏远乡村网络的问题,结合Message Ferry机制,提出了基于多约束条件的Ferry路由机制(MCFR).该机制充分利用Ferry中所携带的数据包信息和节点位置信息计算Ferry到各个节点的评估值,通过评估值选择Ferry的下一跳.仿真结果表明,相对于消息摆渡路由机制(MFR),该路由机制能够提高投递率,并减小端到端时延.

关键词：容迟网络 Message Ferry机制多约束网络仿真

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