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Gongye shui chuli, 2022 铁是地壳中含量第四高的元素，普遍存在于各种环境中，对绝大部分生命形式至关重要。生物源Fe（Ⅱ）是异化铁还原菌在细胞代谢过程中以Fe（Ⅲ）为电子受体所形成的，形成机制包括直接接触、电子穿梭体、螯合剂和纳米导线。微生物介导的异化铁还原是自然界中Fe（Ⅲ）还原的重要途径之一。研究表明，生物源Fe（Ⅱ）对N、P和S等营养物质的循环及污染物的迁移转化具有重要意义。着重介绍生物源Fe（Ⅱ）形成机制及其诱导下，次生Fe（Ⅱ）矿物的形成机理，并阐述其在各类营养元素、重金属的还原固定和有机污染物降解方面的研究现状 ...
冯威 +5 more
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适用于直流配电网故障选线的电力电子变压器分步闭锁方案 [PDF]
, 2023 级联H桥型电力电子变压器（power electronic transformer with cascaded H-bridge，CHB-PET）是柔性变电站的重要组成设备之一，在直流配电网中具有重要作用。当CHB-PET低压直流侧发生双极短路故障后，故障电流上升速度快且幅值较高，易导致电力电子器件迅速闭锁，使低压直流电网保护难以准确获取故障信息。针对CHB-PET低压侧多分支直流配电网，提出一种基于PET分步闭锁的故障穿越策略。当检测到PET低压侧直流系统故障后 ...
于弘洋 +5 more
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, 2007 本实用新型程控条件性逃避反射训练及检测系统，包括：一中间用隔板隔开的联体箱为大鼠穿梭箱，隔板上开有供大鼠穿梭的门，大鼠穿梭箱的顶部为透明材料制作的顶板，两侧板上分别设置信号灯，底部设置用金属柱制作的电击板；PC机为安装好图像采集卡，视频摄像头设置在大鼠穿梭箱顶板的上方，PC机与视频摄像头电连接，PC机还分别与显示器、电路控制器电连接，变压器与电击板、信号灯电连接并受其控制。该系统安装简便，可同时进行多只动物训练和检测。利用该系统进行训练和检测，可在程序控制下自动完成大鼠条件性逃避反射的整个训练过程 ...
杨彤, 鞠平, 隋南
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT To address critical issues in lithium–sulfur batteries, such as slow polysulfide conversion kinetics and shuttle effects, we designed and synthesized a high‐performance nanoalloy catalyst through a defect reconstruction strategy, aiming to enhance the electrochemical performance of batteries.
Zhijun Zhao +10 more
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The commercialization of lithium–sulfur batteries (Li–S batteries) has been hindered by the shuttle effect of lithium polysulfides (LiPSs) and sluggish redox kinetics. In this study, we constructed a three‐dimensional hollow conductive network host material for sulfur with synergistic enhancement effects.
Jie Yang +6 more
wiley +1 more source
, 2013 采用电阻脉冲方法,开展纳米颗粒穿过固基氮化硅薄膜纳米孔的研究。通过实验,成功检测到纳米颗粒穿过纳米孔所导致的离子电流脉冲信号,获得了平均脉冲高度和穿孔时间。发展了基于连续介质假设的输运模型,用于模拟纳颗粒在外加电场作用下通过薄膜纳米孔的动态过程及其对应离子电流信号。该多物理过程耦合模型由求解电势的Possion方程,求解电解质溶液中离子输运的Nemst-Planck方程和求解流体运动的Navier ...
胡国庆, 王俊荣
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Lithium–sulfur (Li–S) batteries are promising for next‐generation high‐energy‐storage systems but are hindered by polysulfide shuttle, sluggish kinetics, and volume expansion. Conventional carbon hosts struggle to simultaneously anchor and convert polysulfides efficiently.
Ling Chen, Peng Xu, Jiaojing Shao
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT The commercialization of lithium‐sulfur batteries (LSBs) faces dual challenges of sluggish sulfur redox kinetics and lithium polysulfides (LiPSs) shuttling. Herein, we demonstrate a synergistic strategy combining multidimensional structural confinement with d‐band center modulation to simultaneously suppress LiPSs diffusion and catalyze ...
Shibo Rong +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT With high theoretical capacity and low cost, bismuth sulfide (Bi2S3) demonstrates considerable potential as an anode for sodium/potassium‐ion batteries (SIBs/PIBs). Unfortunately, significant volume variation, low electrical conductivity, and dissolution of polysulfides drastically weaken their intrinsic merits.
Fuyu Xiao +11 more
wiley +1 more source
四川大学学报. 自然科学版, 2003 用EcoRⅠ酶切含肝片吸虫保护性抗原基因FH3的重组质粒pUC18/FH3,回收FH3(约1.0kb)片段并测定其碱基序列 .FH3片段以正确相位插入到E .coli 分枝杆菌穿梭表达质粒载体pMV2 61中 ,构建含有肝片吸虫保护性抗原基因的重组穿梭质粒 .通过电转移法转化卡介苗 ,斑点杂交实验证明 ,重组卡介苗中含有此抗原基因 .热诱导FH3基因在卡介苗中的表达 ,并对基因表达产物进行SDS PAGE分析 结果显示 ,表达产物相对分子量为 2 2kD .
周宇, 张文露, 黎万奎, 徐恒
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