Results 41 to 50 of about 18,250 (228)

PBP2a体外诱导与 MRSA 的耐药关系

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 1999
目的: 探讨作用于不同青霉素结合蛋白( PBPs)靶位点的 β-内酰胺抗生素联合用药对甲氧西林耐药金黄色葡萄 球菌( MRSA)体外抗菌活性的影响及其 PBP2a的诱导作用。方法: 测定头孢拉啶和头孢氨噻肟单独和联合对 MRSA 的最小抑菌 浓度( MIC)和联合抑菌分数( FIC) , 以甲氧西林敏感金黄色葡萄球菌( MSSA)作对照; 用 SDS-PAGE 法分离细菌膜蛋白, 用分光光 度扫描仪分别测定两种药物单独及联合使用前后菌膜耐药蛋白 PBP2a的相对含量。结果: 头孢拉啶对 20 株 ...
吴本权 唐英春 张扣兴 张天托 朱家馨 谈淑卿
doaj  

In Situ Construction of S‐Scheme VIn‐Zn2In2S5/O‐Zn2In2S5 p–n Homojunctions for Enhanced Photocatalytic Hydrogen Evolution

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT The construction of p–n homojunctions represents a promising strategy for effective solar‐driven photocatalytic hydrogen evolution, owing to their inherent advantages of superior lattice matching and minimized charge transfer resistance. However, this approach remains largely unexplored.
Yueqiang Lin   +6 more
wiley   +1 more source

多模干涉耦合器及其在光通信系统中的应用

open access: yesGuangtongxin yanjiu, 2004
文章概述了多模干涉耦合器的结构、工作原理和目前常用的分析方法,重点阐述了多模干涉耦合器的光传输特性.最后,详细介绍了多模干涉耦合器在光纤通信系统的多种用途.
孙一翎, 江晓清, 王明华
doaj  

Metaproteomic study of marine phytoplankton blooms [PDF]

open access: yes, 2015
浮游植物是海洋初级生产力的主要贡献者,也是海洋食物链的重要组成,在海洋碳循环、生态系统维持和全球气候调节中起着重要作用。浮游植物藻华,特别是高频发生的甲藻和硅藻藻华,深刻地影响着海洋生态系统、全球气候以及人类健康。目前在浮游植物藻华形成的生态学和海洋学机制方面开展了大量工作,但我们对藻华形成的分子机制知之甚少。 本论文将宏蛋白质组学理念和方法应用于海洋浮游植物藻华研究,结合生物信息学分析手段,建立了海洋浮游植物藻华宏蛋白质组学研究方法,比较研究了藻华爆发区与非藻华区 ...
张浩
core  

Sub‐Micrometer Ag Particles Boost Luminescence and Thermal Stability of Perovskite Quantum Dot Phosphors for Light‐Emitting Diodes

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Perovskite quantum dots (QDs) have been considered as promising emitters for lighting and display applications, but they suffer from poor thermal stability under operation. Herein, we introduce sub‐micrometer Ag particles to simultaneously enhance the luminescence intensity and thermal stability of perovskite QDs.
Zhihao Feng   +5 more
wiley   +1 more source

光缆用阻水带测试方法的再研究

open access: yesGuangtongxin yanjiu, 2003
介绍了光缆用阻水带中超强吸水聚合物的结构特性、膨胀吸水及其作用机理。在理论分析的基础上,结合光缆使用的实际情况,对阻水带中起关键作用的超强吸水聚合物的凝胶强度和热稳定性提出了一种简便而有效的测试方法—粘度测试法。通过对比实验,证明了这种方法在阳水带质量控制中具有一定的实际意义。
包宏前, 程淑玲, 刘义霞
doaj  

Ecological study on plankton and water quality bioassessment of the Jiulong River Estuary [PDF]

open access: yes, 2015
本文以环保公益性行业科研专项“入海河口区水质标准和水环境质量评价方法研究(NO:201309007)”2013年9月~2014年4月4个季节的调查数据为基础,对九龙江口浮游生物的种类组成、时空分布、优势种、环境影响因素等进行了研究;基于环境因素和地理水文概况进行了区域划分,探讨了不同分区浮游生物的群落结构特点并对其水质进行了生物学评价。 主要的研究成果如下: 1、九龙江口浮游植物的种类组成和数量变化 本次调查共鉴定浮游植物150种(含变种和变型),隶属于5门63属,其中以硅藻占主导地位 ...
吴白洁
core  

Surface Sulfate Modification Promoted Excitons Extraction of BiOBr Nanosheets for Efficient 1O2 Photosynthesis and Chlorophenols Dechlorination

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT Photocatalytic molecular oxygen (O2) activation provides a sustainable approach to produce singlet oxygen (1O2) for organic contaminants detoxification. However, the charge carriers‐involved pathway usually suffers from unsatisfactory 1O2 production efficiency owing to energy loss caused by photogenerated hole‐mediated superoxide species (•O2−
Yan‐Biao Shi   +8 more
wiley   +1 more source

基于包层各向异性FBG的光开关

open access: yesGuangtongxin yanjiu, 2016
为降低电光开关的插入损耗及简化其结构,提出了一种利用包层各向异性的FBG(光纤布拉格光栅)制作光开关的新思路,并用耦合模理论对其原理进行了分析;同时,提供了一种用掺镁LiTaO3晶体作为光栅包层制作这种光开关的方法。仿真结果表明,电场改变106 V/m时,消光比可达到约42.32dB。该光开关具有较高的消光比,且相比于现有的FBG光开关,具有更简单的结构。
陶子盛, 黄勇林
doaj  

Crystallization Engineering of GaAs/Sb2S3 Core‐Shell Nanowires for Gain Manipulation of Photodetectors

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT Photodetectors, based on GaAs nanowires (NWs), hold significant promise in the fields of high integration micro‐ and nano‐optoelectronics applications because of their outstanding electronic and optical properties. To date, significant efforts have been directed toward enhancing the performance of photodetectors, aiming for high detectivity ...
Yu Hao   +11 more
wiley   +1 more source

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