检索结果-南通市图书馆

Human parvovirus B19-associated early postoperative acquired pure red cell aplasia in simultaneous pancreas-kidney transplantation:A case report

引用

World Journal of Clinical Cases 2021年第8期9卷 1968-1975页

作者： Hui Wang Ying-Xin Fu Wen-Li Song Zhen Wang Gang Feng Jie Zhao ye-qi nian Yu Cao Department of Kidney and Pancreas Transplant Tianjin First Central HospitalSchool of MedicineNankai UniversityTianjin 300192China

BACKGROUND Acquired pure red cell aplasia(aPRCA)related to human parvovirus B19(HPV B19)is rarely reported in simultaneous pancreas-kidney transplantation(SPKT)recipients;there has yet to be a case report of early postoperative *** this current study,we report the case of a Chinese patient who experienced the disease in the early postoperative *** SUMMARY A 63-year-old man,with type 2 diabetes and end-stage renal disease,received a brain dead donor-derived *** treatment consisted of tacrolimus,prednisone,enteric-coated mycophenolate sodium(EC-MPS),and thymoglobulin combined with methylprednisolone as *** hemoglobin(Hb)level declined due to melena at postoperative day(POD)3,erythropoietinresistant anemia persisted,and reticulocytopenia was diagnosed at POD *** bone marrow aspirate showed decreased erythropoiesis and the presence of giant pronormoblasts at POD *** next-generation sequencing(mNGS)of a blood sample identified HPV B19 infection at POD ***-MPS was withdrawn;three cycles of intravenous immunoglobulin(IVIG)infusion therapy were administered;and tacrolimus was switched to *** HPV B19-associated aPRCA resolved completely and did not relapse within the 1-year follow-up *** diminution in mNGS reads was correlated with Hb and reticulocyte count *** HPV B19-associated aPRCA can occur at an early period after *** effective therapy regimen includes IVIG infusion and adjustment of the immunosuppressive ***,mNGS can be used for the diagnosis and to reflect disease progression.

关键词： Anemia Human parvovirus B19 Intravenous immunoglobulin Metagenomic Next-generation sequencing Pancreas transplantation Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Suture ligation for submucosal hemostasis during hand-sewn sideto-side duodeno-ileostomy in simultaneous pancreas and kidney transplantation

引用

World Journal of Gastrointestinal Surgery 2021年第9期13卷 988-999页

作者： Hui Wang Ying-Xin Fu Wen-Li Song Chun-Bai Mo Gang Feng Jie Zhao Guang-Hui Pei Xiao-Feng Shi Zhen Wang Yu Cao ye-qi nian Zhong-Yang Shen Department of Kidney and Pancreas Transplant Tianjin First Central HospitalSchool of MedicineNankai UniversityTianjin 300192China

BACKGROUND Enteric anastomotic(EA)bleeding is a potentially life-threatening surgical complication associated with enteric anastomosis during simultaneous pancreas and kidney transplantation(SPKT).AIM To investigate whether suture ligation(SL)for submucosal hemostasis during hand-sewn enteric anastomosis could decrease the morbidity of early EA bleeding in *** We compared the outcomes of 134 patients classified into SL(n=44)and no SL(NSL)groups(n=90).This study adheres to the declarations of Istanbul and Helsinki and all donors were neither paid nor *** During the first postoperative week,the EA bleeding rate in the SL group was lower than that in the NSL group(2.27%vs 15.56%;P=0.021);no relationship was found between EA bleeding and donor age,mean pancreatic cold ischemia time,platelet count,prothrombin time international normalized rate,activated partial thromboplastin time,and thrombin *** leakage was observed in one case in the SL group at postoperative day(POD)14 and in one case at POD 16 in the NSL group(P=0.754).No significant difference was found between the two groups in the patient survival,pancreas graft survival,or kidney graft *** SL for submucosal hemostasis during hand-sewn enteric anastomosis in SPKT can decrease the morbidity of early EA bleeding without increasing the anastomotic leakage rate.

关键词： Anastomosis Gastrointestinal bleeding Hemostasis Ligation Pancreas Transplantation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Synthesis of chiral phosphine derivatives through a copper（I）-catalyzed desymmetric SNAr reaction

引用

Science China Chemistry 2025年

作者： Shuai Zhang Pei-Zhi Liu Yan-Bo Li qi Zhang Jun-Zhao Xiao Yi-Fan Wang Tian-Yu Wei Jia-Wei Jiang ye Wang qian Peng Liang Yin Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences State Key Laboratory of Elemento-Organic Chemistry and Tianjin Key Laboratory of Biosensing and Molecular Recognition College of Chemistry Frontiers Science Center for New Organic Matter Nankai University Haihe Laboratory of Sustainable Chemical Transformations

Axially chiral phosphines are a class of extremely important ligands in asymmetric catalysis. Herein, an unprecedented copper（I）-catalyzed asymmetric SNAr reaction with HP（S）R2is uncovered, which delivers a series of axially chiral phosphine derivatives in high yields with excellent enantioselectivity. Furthermore, the diastereoselective reaction with the kinetic resolution of racemic HP（S）ArR proceeds smoothly, providing the products with moderate diastereoselectivity and excellent enantioselectivity. Control experiments indicate that HP（S）Ph2is much more active than HPPh2and HP（O）Ph2as the pronucleophile in the present reaction. It is found that the SNAr reaction （the first SNAr） proceeds in a desymmetric manner, providing the desired chiral products while a continued SNAr reaction （the second SNAr） slightly occurs in a kinetic resolution manner in the present catalytic system, which enhances the ee of the desired chiral products. DFTcalculations support a concerted reaction pathway rather than a step-wise mechanism. Finally, axially chiral olefin-phosphines produced by the present method work as suitable ligands in Pdcatalyzed asymmetric allylic substitution with C-, N-, and O-nucleophiles and Rh-catalyzed asymmetric addition of arylboronic acid to benzil.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Double signal amplification sandwich-structured immunosensor based on TiO_2 nanoparticles enhanced CdSe@ZnS QDs electrochemiluminescence and the dramatic quenching effect of Au@polydopamine nanoparticles

引用

Science Bulletin 2016年第12期61卷 931-938页

作者： qi-Le Li Shou-nian Ding School of Chemistry and Chemical Engineering Southeast University

In this work, a double signal amplified immunosen- sor based on the enhanced CdSe@ZnS quantum dots （QDs） electrochemiluminescence （ECL） via TiO2 nanoparticles （TiO2 NPs） and the outstanding quencher of polydopamine （PDA） decorated Au nanoparticles （Au@PDA NPs） for ultrasensitive detection of carcinoembryonic antigen （CEA） has been successfully achieved. The ECL of CdSe@ZnS QDs with different sizes has been investigated carefully, especially cooperation with TiO2 NPs. Au@PDA NPs have been synthesized and characterized by transmission electron microscopy （TEM） and UV-Vis spectrum, which acted as ECL quenchers to label the secondary antibody （Ab2） of CEA to form Ab2/Au@PDA NPs conjugates. The sandwich-structured immunosensor was formed between capture antibody （Abl） on CdSe@ZnS QDs/TiO2 NPs/glassy carbon electrode, CEA and Ab2/Au@PDA NPs conjugates, resulting in a proportional ECL quenching signal relevant to the CEA concentration. Thus, CEA as a model biomarker has been detected in the linear range from 0.001 to 100 ng mL^-1 with a limit of detection of 0.35 pg mL^-1 （S/N = 3）.

关键词： Electrochemiluminescence CdSe@ZnSQDs TiO2 NPs Au@PDA nanoparticles Immunosensor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multicolor electrochemiluminescence of core-shell CdSe@ZnS quantum dots based on the size effect

引用

Science China Chemistry 2016年第11期59卷 1508-1512页

作者： qi-Le Li Shou-nian Ding Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research School of Chemistry and Chemical Engineering Southeast University

Multicolor electrochemiluminescence(ECL) of semiconductor nanocrystals tuned by size effect has been successfully achieved using quantum dots(QDs) with core-shell structure for the first time. It would open a new way and provide a guidance for design and preparation of stable and strong multicolor ECL emitters for simultaneous multicomponent analysis application.

关键词： CdSe@ZnSQDs electrochemiluminescence size effect multicolor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improved three-vector based dead-beat model predictive direct power control strategy for grid-connected inverters

引用

Frontiers of Information Technology & Electronic Engineering 2018年第11期19卷 1420-1431页

作者： Chen-wen CHENG Heng nian Long-qi LI College of Electrical Engineering Zhejiang University

Since only one inverter voltage vector is applied during each duty cycle, traditional model predictive direct power control(MPDPC) for grid-connected inverters(GCIs) results in serious harmonics in current and power. Moreover, a high sampling frequency is needed to ensure satisfactory steady-state performance, which is contradictory to its long execution time due to the iterative prediction calculations. To solve these problems, a novel dead-beat MPDPC strategy is proposed, using two active inverter voltage vectors and one zero inverter voltage vector during each duty cycle. Adoption of three inverter vectors ensures a constant switching frequency. Thus, smooth steady-state performance of both current and power can be obtained. Unlike the traditional three-vector based MPDPC strategy, the proposed three vectors are selected based on the power errors rather than the sector where the grid voltage vector is located, which ensures that the duration times of the selected vectors are positive all the time. Iterative calculations of the cost function in traditional predictive control are also removed, which makes the proposed strategy easy to implement on digital signal processors(DSPs) for industrial applications. Results of experiments based on a 1 kW inverter setup validate the feasibility of the proposed three-vector based dead-beat MPDPC strategy.

关键词： Grid-connected inverter Model predictive control Direct power control Three vectors Constant switching frequency Power errors

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Solution-phase Synthesis of One-dimensional Semiconductor Nanostructures

引用

Journal of Materials Science & Technology 2008年第4期24卷 529-540页

作者： Jianfeng ye Limin qi Beijing National Laboratory for Molecular Sciences （BNLMS） State Key Laboratory for Structural Chemistry of Unstable and Stable Species College of Chemistry Peking University Beijing 100871 China

The synthesis of one-dimensional （1D） semiconductor nanostructures has been studied intensively for a wide range of materials due to their unique structural and physical properties and promising potential for future technological applications. Among various strategies for synthesizing 1D semiconductor nanostructures, solution-phase synthetic routes are advantageous in terms of cost, throughput, modulation of composition, and the potential for large-scale and environmentally benign production. This article gives a concise review on the recent developments in the solution-phase synthesis of ID semiconductor nanostructures of different compositions, sizes, shapes, and architectures. We first introduce several typical solution-phase synthetic routes based on controlled precipitation from homogeneous solutions, including hydrothermal/solvothermal process, solution-liquid-solid （SLS） process, high-temperature organic-solution process, and low-temperature aqueous-solution process. Subsequently, we discuss two solution-phase synthetic strategies involving solid tem- plates or substrates, such as the chemical transformation of 1D sacrificial templates and the oriented growth of 1D nanostructure arrays on solid substrates. Finally, prospects of the solution-phase approaches to 1D semiconductor nanostructures will be briefly discussed.

关键词： Solution-phase synthesis One-dimensional Nanostructures Semiconductor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Burning surface formation mechanism of laser-controlled 5-aminotetrazole propellant

引用

Defence Technology（防务技术） 2023年第7期25卷 48-59页

作者： nian-bai He Rui-qi Shen Luigi T.DeLuca Li-zhi Wu Wei Zhang Ying-hua ye Yue-ting Wang School of Chemical Engineering Nanjing University of Science and Technology210094JiangsuChina Institute of Space Propulsion Nanjing University of Science and Technology210094JiangsuChina Sichuan Huachuan Industries Corporation 610106SichuanChina Space Propulsion Laboratory(Ret) Department of Aerospace Science and TechnologyPolitecnico di Milano20156MilanItaly

As an innovative propulsion technique, combustion mechanism of laser-augmented chemical propulsion has still to be ascertained. Benefiting from high nitrogen content and thermal stability, 5-aminotetrazole is a suitable ingredient for LACP. Under a flowing nitrogen environment, two kinds of unique burning surfaces were observed to occur for 5-ATZ, used as a single reacting propellant ingredient with the addition of carbon, under laser ablation. Both surfaces are hollow structures and differ by the possible presence of edges. Using micro computed tomography, the 3D perspective structures of both surfaces were revealed. Resorting to various characterization methods, a unified formation mechanism for both surfaces is proposed. This mechanism specifically applies to laser ablation, but could be crucial to common burning mechanisms in LACP.

关键词： 5-Aminotetrazole(5-ATZ) Laser-augmented chemical propulsion (LACP) Combustion mechanism Burning surface Micro computed tomography(MicroCT)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Surgical treatment of bipolar segmental clavicle fracture:A case report

引用

World Journal of Clinical Cases 2022年第29期10卷 10529-10534页

作者： Lin Liang Xin-Lei Chen ye Chen nian-nian Zhang Department of Orthopedics Shangyu People’s Hospital of Shaoxing CityShaoxing 312000Zhejiang ProvinceChina Department of Orthopedics Haimen People’s HospitalNantong 226000Jiangsu ProvinceChina

BACKGROUND Shoulder injuries caused by trauma are common,including clavicle *** so,bipolar segmental fracture of the clavicle is extremely rare and seldom ***,there is still a controversial issue about how to treat these bipolar segmental clavicle *** SUMMARY A 56-year-old security guard arrived at our emergency room after falling on his electric *** was no loss of consciousness or other *** had no numbness in his fingers.X-rays and 3D computed tomography revealed that the patient’s right shoulder had a bipolar segmental clavicle *** surgical procedure included both open reduction and internal *** the 1-year follow-up,he had a full range of motion and minimal discomfort in the injured *** We provide a rare case of bipolar clavicle facture in the right *** hold the opinion that such patients would get better clinical and radiological outcomes by early and correct operation.

关键词： Bipolar segmental clavicle fracture Arm sling Open reduction and internal fixation Acromioclavicular hook plate Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of Roughness Elements Distribution on Overland Flow Resistance

引用

Journal of Mountain Science 2015年第5期12卷 1145-1156页

作者： ye Chen LIU Xing-nian WANG Xie-kang State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University

Roughness elements are various in a mountain area; they include gravel and ground surface vegetation that often result in surface friction drag to resist overland flows. The variation and characteristics of flow resistance strongly impact the overland flow process and watershed floods. In view of the universal existence of natural vegetation, such as Chlorophytum malayense(CM) or Ophiopogon bodinieri(OB), and the sand-gravel bed of the river channel, it is important to understand the role of different types of roughness elements in flow resistance. This study was performed to investigate and compare through flume experiments the behaviors of overland flow resistance by the reaction of multi-scale configuration of different roughness elements. The result showed that the resistance coefficient gradually reduced versus the increase of flow rate in unit width and tended to be a constant when q = 3.0 l/s.m, Fr = 1.0, and Re = 4000 for slopes of 6 to 10 degrees. The gap of the vegetated rough bed and the gravel rough bed is limited to the same as the gap of the two types of vegetation, CM and OB. It was noted that the vegetation contributed to the increase in form resistance negatively and may lead to the mean resistance on decrease. To classify the flow pattern, the laminar flows were described by DarcyWeisbach's equation. In the study the f-Re equation of vegetated bed was developed with f ?5000 *** friction coefficient for laminar flows can be regarded as the critical value for identifying the transformation point of the flow pattern.

关键词： Overland flow Roughness element Flowresistance Reynolds number Chlorophytummalayense Ophiopogon bodinieri

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：