Results 41 to 50 of about 13,175 (168)

局部放电中的SF6分解产物及其影响因素研究

open access: yesGaoya dianqi, 2011
通过在110 kV GIS(气体全封闭组合电器)设备中模拟局部放电故障,研究了在局部放电作用下电极材料、放电强度、气体湿度和吸附剂对SF6分解产物中SO2+SOF2和HF体积分数的影响及其变化规律。结果表明,电极材料、放电强度和吸附剂对SF6分解产物的生成有较大影响,而气体湿度对分解产物的生成影响不大。研究结果为通过SF6分解产物判断设备故障提供了理论基础。
龚尚昆   +6 more
doaj  

H2O浓度对填充床式反应器降解SF6影响的实验研究

open access: yesGaoya dianqi, 2021
SF6的强温室效应对全球气候的潜在影响已经引起了人们的高度担忧,对SF6进行降解是处理SF6的一种有效手段。文中基于填充床式反应器(PBR),针对系统中H2O浓度对降解SF6的影响进行了研究,并从降解效率与产物两个角度进行了分析。研究结果表明H2O能够在PBR中产生大量的OH与H自由基,这些活性自由基能够与SF6的初级分解产物进行次级反应从而促进其分解,提高了其降解率。实验发现,当SF6体积分数为2%时,最有利于促进SF6降解的水汽浓度为1%,其降解率达到95.69%。同时 ...
董晓虎   +8 more
doaj  

Study on the related substances in enoxacin preparation [PDF]

open access: yes, 2015
依诺沙星为第三代喹诺酮类抗生素,具有广谱抗菌作用。国家食品药品监督管理局分别于2011年和2013年在《药品不良反应信息通报》第35、58期发布了关于氟喹诺酮类药品所导致的不良反应的信息通报。其不良反应主要表现为胃肠道反应、中枢神经系统反应、药物联合应用导致的不良反应。为进一步研究该品种产品质量状况,为不良反应产生的原因提供参考,提高原料及制剂生产过程中的质量控制,有关物质研究在该品种的质量分析中是重要且必要的。 本研究采用高效液相色谱—三重串联四极杆质谱及超高分辨四极杆 ...
黄婧
core  

Effects of landscape context on avian specialist response to increased surface temperature in protected areas

open access: yesConservation Biology, EarlyView.
Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge   +2 more
wiley   +1 more source

火花放电下SF6特征分解产物演化特性研究

open access: yesGaoya dianqi, 2020
高压SF6开关设备运行中的放电故障(火花放电、电弧、局部放电等)诱导SF6分解为低氟硫化物,放电温度降低带来的SF6复合过程仍可保证设备具有良好的绝缘和灭弧能力。然而,当低氟硫化物与设备内无法避免的水蒸气和氧气杂质发生反应时,产生的腐蚀性产物会对设备的正常运行带来威胁,从而为利用SF6特征分解产物进行故障诊断提供依据。因此,文中利用气相色谱仪诊断技术对火花放电下SF6特征分解产物SOF2,SO2F2和SO2的演化特性进行研究,结果表明产物的摩尔分数随水蒸气和氧气体积分数的增加而升高 ...
付钰伟   +5 more
doaj  

SF6/N2混合气体在电弧作用下分解产物试验研究

open access: yesGaoya dianqi, 2021
SF6/N2混合气体具有良好的绝缘性能和一定的开合电流能力并且可以降低对局部电场畸变的敏感程度、解决SF6气体的液化问题,可以大大减少SF6气体的使用量和排放量,减小对环境的温室效应影响,对加强节能减排和实现低碳发展具有重要意义。近年来,国家电网公司为响应国家节能减排号召,组织开展了SF6/N2混合气体用于GIS母线、隔离和接地开关的工作,研究确定了SF6/N2混合气体GIS母线、隔离和接地开关采用统一的30%混合比(SF6:N2=30%:70%),多个厂家的产品通过了型式试验和新产品技术鉴定 ...
季严松   +8 more
doaj  

激光强度影响酸性多肽解吸电离和稳定性的研究 [PDF]

open access: yes, 2003
应用基质辅助激光解吸电离飞行时间质谱技术研究了激光强度对酸性多肽 (acidicpeptide,AP)解吸电离和稳定性的影响。实验结果表明了过强的激光强度会影响AP的稳定性 ,并引起部分AP分解成 3~ 8种新的多肽结构 ...
黄河清
core  

Tolerability and Feasibility of Minimally Invasive Canine Skin Sampling: Excellent Tolerability Meets Transcriptomic Challenges

open access: yesVeterinary Dermatology, EarlyView.
ABSTRACT Background Advances in transcriptomics have driven the demand for minimally invasive, reproducible and high‐yield skin sampling methods, particularly for studying inflammatory skin diseases in companion animals. Hypothesis/Objectives We tested tolerability, feasibility and RNA quantity and quality of three minimally invasive skin sampling ...
Ina Herrmann   +2 more
wiley   +1 more source

Devouring the Invaders: The Racial‐Ecological Politics of the Chinese Crayfish Trade in Kenya

open access: yesAmerican Anthropologist, Volume 128, Issue 1, Page 183-194, March 2026.
ABSTRACT This article examines entanglements of ecology, race, and foodways at Lake Naivasha in Kenya. Nonnative Louisiana red swamp crayfish (Procambarus clarkii), first introduced to Kenya in the 1960s, were once viewed as invasive but are now sought after as a delicacy among Kenya's Chinese community.
Amanda Kaminsky
wiley   +1 more source

Effect of Fluoroethylene Carbonate Additive on the Performance of Lithium Ion Battery [PDF]

open access: yes, 2008
Fluoroethylene carbonate (FEC) with a volume ratio of 2% was added to the electrolyte containing 1 mol L-1 LiPF6, in ethylene carbonate (EC), dimethyl carbonate (DMC), and methyl ethyl carbonate (EMC) (1: 1: 1 by volume).
Wang, Zhou-Cheng   +9 more
core  

Home - About - Disclaimer - Privacy