检索结果-南通市图书馆

World Journal of Clinical Cases 2019年第2期7卷 228-235页

作者： Yong-Cai Liu Min-Li Zhou Ke-Jia cheng Shui-Hong Zhou Xue Wen cheng-dong chang Department of Otolaryngology the First Affiliated Hospital College of Medicine Zhejiang University Department of Pathology the First Affiliated Hospital College of Medicine Zhejiang University

BACKGROUND Invasive fungal rhinosinusitis(IFR) caused by Cunninghamella is very rare but has an extremely high fatality rate. There have been only seven cases of IFR caused by Cunninghamella reported in English and, of these, only three patients *** this article, we present another case of IFR caused by Cunninghamella, in which the patient was initially treated successfully but then deteriorated due to a relapse of leukemia 2 mo *** SUMMARY A 50-year-old woman presented with a 2-mo history of right ocular proptosis,blurred vision, rhinorrhea and nasal obstruction. Nasal endoscopic examination showed that the middle turbinate had become necrotic and fragile. Endoscopic sinus surgery and enucleation of the right orbital contents were performed successively. Additionally, the patient was treated with amphotericin B both systematically and topically. Secretion cultivation of the right eye canthus showed infection with Cunninghamella, while postoperative pathology also revealed fungal infection. The patient's condition gradually stabilized after surgery. However, the patient underwent chemotherapy again due to a relapse of leukemia 2 mo later. Unfortunately, her leukocyte count decreased dramatically,leading to a fatal lung infection and *** Aggressive surgical debridements, followed by antifungal drug treatment both systematically and topically, are the most important fundamental treatments for IFR.

关键词： Cunninghamella Invasive fungal rhinosinusitis Acute myeloid leukemia Treatment Prognosis Case report

Metal-organic frameworks with dinuclear metal centers for synergistically boosting CO2 photoreduction

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

Science China Chemistry 2025年第1期68卷 201-208页

作者： Hui-Feng Wang Wen-Jie Shi Yu-Xin Yang Bao-Xia dong Tong-Bu Lu Di-chang Zhong School of Chemistry and Chemical Engineering Yangzhou University Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology

Dinuclear metal synergistic catalysis （DMSC） has been proved powerful in boosting CO2reduction,while this has not been achieved in heterogeneous catalysts with long-range order *** this study,we,by introduction of metal catalytic centers into an indium-based metal-organic framework （MOF）,obtained a series of isostructural In-MOFs,including three MOFs with mononuclear metal catalytic center （M-In）,three MOFs with dinuclear homometallic catalytic centers （MM-In）,and three MOFs with dinuclear heterometallic catalytic centers (MM’-In,M/M’=Co（II）,Ni（II）,Zn（II）).It was found that all these MOFs can serve as catalysts for photochemical CO2reduction to *** with M-In,the catalytic activities of MM-In were obviously enhanced,and that of MM’-In was further significantly *** example,the CO yield of Co Zn-In reaches a record value of 12,700μmol g-1h-1,which is 4.0,8.1,9.4,and 18.6-fold higher than that of Co Co-In,Zn Zn-In,Co-In,and Zn-In,***,the catalytic activities of Co Ni-In and Ni Zn-In also show different fold increase than those of corresponding dinuclear homometallic and mononuclear metallic *** results of control experiments and theoretical calculation reveal that the higher catalytic activities of MM-In over M-In can be ascribed to the DMSC effect,and the higher catalytic activity of MM’-In over MM-In can be ascribed to the strengthened DMSC *** work reveals the relationship between DMSC effect and bimetal centers in CO2reduction,which provides new insights into the DMSC and paves a new way to design highly active catalysts for photochemical CO2reduction.

关键词： metal-organic frameworks dinuclear metal centers synergistic catalysis CO2 reduction photocatalysis

Aligned Ion Conduction Pathway of Polyrotaxane‑Based Electrolyte with Dispersed Hydrophobic Chains for Solid‑State Lithium–Oxygen Batteries

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 169-186页

作者： Bitgaram Kim Myeong‑chang Sung Gwang‑Hee Lee Byoungjoon Hwang Sojung Seo Ji‑Hun Seo dong‑Wan Kim Department of Materials Science and Engineering Korea University145 Anam‑RoSeongbuk‑GuSeoul 02841Republic of Korea School of Civil Environmental and Architectural EngineeringKorea University145 Anam‑RoSeongbuk‑GuSeoul 02841Republic of Korea Materials Science and Chemical Engineering Center Institute for Advanced Engineering(IAE)Yongin 17180Republic of Korea

A critical challenge hindering the practical application of lithium–oxygen batteries(LOBs)is the inevitable problems associated with liquid electrolytes,such as evaporation and safety *** study addresses these problems by proposing a modified polyrotaxane(mPR)-based solid polymer electrolyte(SPE)design that simultaneously mitigates solvent-related problems and improves ***-SPE exhibits high ion conductivity(2.8×10^(−3)S cm^(−1)at 25℃)through aligned ion conduction pathways and provides electrode protection ability through hydrophobic chain *** this mPR-SPE into solid-state LOBs resulted in stable potentials over 300 *** situ Raman spectroscopy reveals the presence of an LiO_(2)intermediate alongside Li_(2)O_(2)during oxygen *** situ X-ray diffraction confirm the ability of the SPE to hinder the permeation of oxygen and moisture,as demonstrated by the air permeability *** present study suggests that maintaining a low residual solvent while achieving high ionic conductivity is crucial for restricting the sub-reactions of solid-state LOBs.

关键词： Solid polymer electrolyte Lithium-oxygen batteries Polyrotaxane ion conductivity Hydrophobic chain

维普期刊数据库

在线全文

学校读者我要写书评

暂无评论

多品种少批量制造环境下的改进型生产系统

计算机集成制造系统 2009年第9期15卷 1831-1835,1843页

作者：王时龙程畅栋任亨斌蔡斌重庆大学机械传动国家重点实验室重庆400044

为在多品种少批量制造环境下实现准时制精益生产模式,研究了多品种少批量制造环境下的生产物流特性,构建了一种该环境下的准时制物流体系。通过分析对比看板、鼓-缓冲-绳和固定在制品三种控制策略的优缺点,提出了一种改进的综合型车间... 详细信息

为在多品种少批量制造环境下实现准时制精益生产模式,研究了多品种少批量制造环境下的生产物流特性,构建了一种该环境下的准时制物流体系。通过分析对比看板、鼓-缓冲-绳和固定在制品三种控制策略的优缺点,提出了一种改进的综合型车间物流控制方法。该综合型控制方法融合了看板、鼓-缓冲-绳和固定在制品在不同监控层级的优点,克服了三者在复杂制造环境中各自的不足。基于该控制方法,建立了一套适合于多品种少批量制造环境的车间作业计划系统,并在重庆某企业得到成功应用。

关键词：多品种少批量准时制精益生产物流看板鼓-缓冲-绳固定在制品

维普期刊数据库

Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 288-296页

作者： Shuai Liu Wen-Qiang Xu Ying-Tong Di Man-cheng Tang Ding-Kang Chen Ming-Ming Cao Yao-Wen chang Hong-Yu Tang Chun-Mao Yuan Jun-Bo Yang Zhi-Li Zuo Han Guo Zi-Fei Xu Ying Zeng Yun-dong Wu Xiao-Jiang Hao Key Laboratory of Phytochemistry and Natural Medicines (Chinese Academy of Sciences) Kunming Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen Bay Laboratory State Key Laboratory of Microbial Metabolism School of Life Sciences & Biotechnology Shanghai Jiao Tong University State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany Chinese Academy of Sciences Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany Chinese Academy of Sciences Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical Sciences

In the intricate process of natural product biosynthesis, a metabolon can enhance metabolic flux by associating sequential enzymes. A fungal metabolon, comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G, is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide B. Using notoamide E as a substance, Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation, followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium unit. Subsequently,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol rearrangement. This provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

关键词： metabolon Diels-Alder reaction semipinacol rearrangement biosynthesis notoamides spiro polycyclic alkaloids

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

事件驱动下的并行任务调度方法研究

系统仿真学报 2000年第1期12卷 25-30页

作者：程长东申功璋文传源北京航空航天大学自动控制系北京100083

在对混合系统的仿真中 ,存在着大量的并行性问题 ,并行性不仅表现在连续系统仿真模块、离散事件系统仿真模块、推理决策系统模块内部 ,而且也表现在各模块间 ,这里以连续系统内部的并行计算为例 ,研究它们在事件驱动方式下的并行任务调... 详细信息

在对混合系统的仿真中 ,存在着大量的并行性问题 ,并行性不仅表现在连续系统仿真模块、离散事件系统仿真模块、推理决策系统模块内部 ,而且也表现在各模块间 ,这里以连续系统内部的并行计算为例 ,研究它们在事件驱动方式下的并行任务调度过程。

关键词：混合系统仿真事件驱动并行任务调度

维普期刊数据库

Recent progress on photoactive nonprecious transition-metal complexes

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 46-95页

作者： Zhong-Liang Gong Hong-Jie Zhang Yan cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui Feng Qiong Zhang Shaolong Gong Yong Chen chang-Jiang Yao Yuan-Yuan Zhu Liang-Jin Xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of Technology State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical Engineering Beijing Institute of Technology College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University School of Chemistry and Chemical Engineering Anhui University Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Photoactive complexes of nonprecious transition metals, mainly including those in the first-row and partially the second-row of the Periodic table of elements, have received increasing attention in view of their low cost and long-term sustainability. They are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices, artificial photosynthesis, photocatalysis, biodiagnostics, and therapeutics, etc. This review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes, including photoactive Zr, V, Cr, Mo, and W complexes, Mn complexes and hybrids, Fe, Co, Ni, and Cu complexes, and Zn and Cd complexes and hybrids. A particular focus is given on the molecular design, modulation of photophysical and photochemical properties, and applications of the representative and lately-developed nonprecious metal complexes. In addition, a perspective on the future development in this field is provided at the end of this review.

关键词： photoactive metal complexes earth-abundant metals nonprecious metal complexes luminescence photochemistry

场放大进样-胶束扫集法测定升麻中3种有机酸

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

分析化学 2008年第9期36卷 1261-1264页

作者：李利军蔡卓李斯光吴峰敏李海燕陈昌东程昊吴健玲广西工学院生物与化学工程系广西大学化学化工学院 3. 中山大学中山医学院

利用两种在线富集技术,对阿魏酸、异阿魏酸、咖啡酸同时测定的方法进行了研究。在胶束扫集的基础上,联用场放大进样,使富集倍数提高了约100倍;检出限降至4μg/L,线性范围向下延伸到10μg/L。胶束扫集电动色谱缓冲体系为90mmol/LSDS+20mm... 详细信息

利用两种在线富集技术,对阿魏酸、异阿魏酸、咖啡酸同时测定的方法进行了研究。在胶束扫集的基础上,联用场放大进样,使富集倍数提高了约100倍;检出限降至4μg/L,线性范围向下延伸到10μg/L。胶束扫集电动色谱缓冲体系为90mmol/LSDS+20mmol/LNa2PO4(pH=2.20)+10%甲醇,分离电压20kV。进样电压10kV,进样时间21s,进水时间210s(H=20.0cm),测量波长214nm。讨论了SDS浓度、进样长度、进样电压等对分离效果的影响。在优化条件下,3种有机酸在14min内出峰,峰面积RSD≤3.8%。方法检出限(μg/L)、线性范围(μg/L)、相关系数分别为:阿魏酸4.0、10～400、0.9982;异阿魏酸4.0、10～400、0.9970;咖啡酸5.0、10～400、0.9980。回收率为83.9%～114.3%。

关键词：毛细管电泳场放大进样胶束扫集阿魏酸异阿魏酸咖啡酸

Cerebral fat embolism following autologous fat injection in facial reconstruction:A case report

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2025年第2期13卷 50-58页

作者： Xiu-Ying Chen Fa Shen chang cheng Yu-Han Wang Wen-Chao cheng De-Zhi Yuan Wen Huang Department of Neurology Chongqing Emergency Medical CenterChongqing University Central HospitalChongqing 400000China Department of Neurology Xinqiao HospitalThe Army Medical University(Third Military Medical University)Chongqing 400000China

BACKGROUND Autologous fat injection in facial reconstruction is a common cosmetic *** cerebral fat embolism(CFE)as a complication is rare,it carries serious health *** SUMMARY We present a case of a 29-year-old female patient who developed acute CFE following facial fat filling *** the surgery,the patient experienced symptoms including headache,nausea,vomiting,and difficulty breathing,which was followed by neurological symptoms such as slurred speech and left-sided *** physical examination and auxiliary investigations,including blood tests,head and neck computed tomography angiography,and cranial magnetic resonance diffusion-weighted imaging,were performed upon *** clinical diagnosis was acute cerebral embolism following facial fat filling *** included measures to improve cerebral circulation,dehydration for intracranial pressure reduction,nutritional support,and rehabilitation therapy for left limb *** patient showed a significant improvement in symptoms after 2 weeks of *** recovered left limb muscle strength to grade 5,had clear speech,and experienced complete relief of *** Our case highlights the potential occurrence of severe complications in patients undergoing fat injection in facial *** prevent these complications,plastic surgeons should enhance their professional knowledge and skills.

关键词： Cerebral fat embolism Mechanical thrombectomy Thrombolysis Steroid therapy Symptomatic treatment Case report

基于双车接触点响应残差的桥梁模态参数识别方法研究

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