Results 41 to 50 of about 13,915 (159)

Rational Design of Multifunctional Nano–Architected Coatings for Bipolar Plates in Proton Exchange Membrane Fuel Cells

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Proton exchange membrane fuel cells (PEMFCs) require advanced bipolar plate coatings to enhance efficiency, durability, and commercialization potential. This review presents a systematic framework for evaluating and designing bipolar plate coatings, integrating material selection, performance metrics, deposition techniques, and future ...
Shijie Li   +12 more
wiley   +1 more source

伤寒沙门菌多药耐药株的整合子及抗性基因检测

open access: yesZhongguo shiyan zhenduanxue, 2009
目的为鉴定伤寒沙门菌的耐药性获得与整合子之间的关系,确定该菌抗性基因扩散的可能机制。方法我们选取32株多药耐药的伤寒沙门菌株提取全基因组DNA,扩增整合子,并以此作为模板检测抗性基因。结果以伤寒沙门菌基因组DNA为模板有81.2%的菌株,能够扩增出相应整合子的目的片段。具有四环素抗性、氨苄青霉素抗性和复方磺胺抗性的样品,以其扩增产物作为模板全部能扩增出相应抗性基因suⅡ、blaTEM-1和tetG。结论伤寒沙门菌的抗性基因是整合在Ⅰ类整合子中的,故整合子的转移应是伤寒沙门菌抗性基因传递的一种主要途径。
黄海, 李军, 黄健, 陶建蜀
doaj  

支撑式换流阀塔用支柱复合绝缘子的选型设计

open access: yesGaoya dianqi, 2022
绝缘子的选型设计对支撑式换流阀塔至关重要。文中介绍了±535 k V电压等级支柱复合绝缘子的选型设计过程,包括芯体和伞套的成型工艺选择以及绝缘子的外绝缘设计(爬电距离和干弧距离计算)等。将所选型的支柱复合绝缘子用于±535 kV支撑式换流阀塔,通过阀塔整体的耐压试验和抗震仿真,验证了按照此过程所选型的支柱复合绝缘子在绝缘性能和结构强度上可满足使用要求。
孟佳   +6 more
doaj  

A retrospective analysis of antibiotic treatment of pneumonia caused by Acinetobacter baumannii [PDF]

open access: yes, 2013
目的:本文回顾性分析我院鲍曼不动杆菌肺炎患者抗菌药物的使用情况及治疗结果,以期为我院鲍曼不动杆菌感染患者的抗菌治疗提供依据。方法:对我院2011年1月-2012年12月收治的鲍曼不动杆菌(ACInETObACTEr bAuMAnnII,A.b)所致肺炎患者的临床基本资料、药敏情况、抗菌药物使用情况及治疗结果进行统计和分析。结果:48例鲍曼不动杆菌肺炎患者都存在严重原发病或免疫功能低下。在48株A.b中检出多重耐药鲍曼不动杆菌(Mdr A.b)12株,A.b对亚胺培南耐药率最低(19.05 ...
姚天赐, 张彧梅, 许萌芽
core  

Drug resistance in 38 cases of carbapenem-resistant Serratia marcescens infection in a grade Ⅲ level A general hospital in Shanghai [PDF]

open access: yes
ObjectiveTo understand the infection characteristics and drug resistance of carbapenem-resistant Serratia marcescens (CRSM) in a general hospital in Shanghai, and to provide a theoretical basis for clinical anti-infective treatment and prevention of drug-
JI Wei   +4 more
core   +1 more source

N,W‐Cooperative Modulation of Ni3S2 for Efficient Electrocatalytic Oxidation of 5‐Hydroxymethylfurfural to 2,5‐Furandicarboxylic Acid

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT Ni3S2 has emerged as a promising catalyst for the electrochemical oxidation of biomass‐derived 5‐hydroxymethylfurfural (HMF) to 2,5‐furandicarboxylic acid (FDCA), driven by its distinctive physicochemical properties. However, its practical catalytic efficiency is severely hindered by abundant electrochemically inactive surface sites and poor ...
Cheng‐Feng Yi   +5 more
wiley   +1 more source

铜绿假单胞菌整合子Ⅰ和ISCR1分布及ERIC-PCR分型

open access: yesZhongguo shiyan zhenduanxue, 2012
目的研究临床分离铜绿假单胞菌的整合子Ⅰ和ISCR1的分布情况,并对其进行基因分型。方法分离临床234株铜绿假单胞菌,用WHONET5.4分析菌株药敏情况,PCR检测整合酶Ⅰ、整合子Ⅰ、ISCR1以及ISCR1携带的耐药基因。ERIC-PCR进行基因分型。结果铜绿假单胞菌对阿莫西林/克拉维酸、氨苄西林、氯霉素、头孢唑啉、米诺环素、氨苄西林/舒巴坦高度耐药,对环丙沙星、头孢他啶、头孢哌酮/舒巴坦、阿米卡星、亚胺培南、美洛培南较敏感,118株整合酶Ⅰ阳性,95株Ⅰ类整合子可变区阳性 ...
孙静静, 吴奎海, 芮勇宇
doaj  

研究開発学校におけるカリキュラム・マネジメントの実践(学校における教育課程編成の実証的研究報告書1)(令和元年度 プロジェクト研究調査研究報告書) [PDF]

open access: yes, 2020
目 次第1 章 本報告書の位置付け ············ 1第2 章 研究開発における実践研究調査 1 調査の概要 ················· 5 2 調査結果の概要 ············· 6 3 調査から得られた示唆 ······ 29第3 章 カリキュラム・マネジメントの実践事例 ············ 33 1 北海道東川町立東川小学校 ·· 34 2 東京都町田市立鶴川第二小学校 ················· 40 3 兵庫教育大学附属小学校 ···· 55 4 ...
笹井 弘之
core   +1 more source

Interfacial Electronic Interactions in Hierarchical Heterostructure Electrocatalyst for Energy‐Saving Hydrogen Production at Industrial Current Densities

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT Developing low‐energy‐input electrocatalytic systems for efficient hydrogen production is crucial for advancing sustainable energy technologies. The overall hydrazine splitting (OHzS) has emerged as a promising strategy to reduce the overall energy consumption by replacing the sluggish oxygen evolution reaction.
Haozhou Chen   +13 more
wiley   +1 more source

Negative regulation of transcription coactivator p300 by orphan receptor TR3 [PDF]

open access: yes, 2008
p300可以通过形成激活复合物或者通过促进组蛋白乙酰化来调节一系列转录因子的转录活性。它在转录水平上调节多个信号通路的过程中发挥重要作用。在不同的外界生理刺激条件下,p300通过调节基因表达,从而引起一系列生理功能的变化,如细胞增殖、分化和凋亡。核孤儿受体TR3属于类固醇/甲状腺受体超家族成员。TR3是一种立早基因,可以被血清、佛波酯和各种生长因子等诱导表达。TR3在细胞凋亡、增殖、分化和发育等过程中发挥了重要作用。我们实验室已经证实TR3能够与p53结合,抑制p53的乙酰化和转录活性 ...
李贵登
core  

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