Results 151 to 160 of about 81,247 (279)

Genetic Parameters of Methane Emission, Feed Efficiency, Feeding Behaviour, and Growth Traits in Beef Cattle

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT Climate change has intensified the need to reduce greenhouse gas emissions, particularly methane (CH4) from enteric fermentation. Genetic selection has emerged as a promising mitigation strategy; however, studies on Bos taurus indicus , especially Nellore cattle, remain limited.
J. A. Silva, J. P. S. Valente, L. F. M. Mota, G. R. D. Rodrigues, T. L. S. Soares, J. O. S. Marcatto, A. M. Pelaez, F. M. Monteiro, R. C. Canesin, L. G. Albuquerque, M. E. Z. Mercadante   +10 more
wiley   +1 more source

Sustained growth of sulfur hexafluoride emissions in China inferred from atmospheric observations

Nature Communications
Sulfur hexafluoride (SF6) is a potent greenhouse gas. Here we use long-term atmospheric observations to determine SF6 emissions from China between 2011 and 2021, which are used to evaluate the Chinese national SF6 emission inventory and to better ...
Minde An, Ronald G. Prinn, Luke M. Western, Xingchen Zhao, Bo Yao, Jianxin Hu, Anita L. Ganesan, Jens Mühle, Ray F. Weiss, Paul B. Krummel, Simon O’Doherty, Dickon Young, Matthew Rigby   +12 more
doaj   +1 more source

Feasibility of Substituting Ethylene with Sulfur Hexafluoride as a Tracer Gas in Hood Performance Test by ASHRAE-110-95 Method

International Journal of Occupational Hygiene, 2015
ANSI/ASHRAE 110-95 protocol is a widely acceptable method to assess the performance of laboratory hoods. In this test, sulfur hexafluoride (SF6) is applied as a tracer gas to quantitatively evaluate the performance of laboratory hoods.
MOHAMMAD JAVAD JAFARI, SABA KALANTARI, REZVAN ZENDEHDEL, PARVIN SARBAKHSH   +3 more
doaj  

放电条件下SF₆气体分解产物变化情况的研究

Gaoya dianqi, 2012
对SF6气体分解产物的组成及其体积分数进行测定和分析研究与SF6电气设备安全运行密切相关。笔者建立了SF6电气设备模拟放电试验方法,使用气相色谱法、离子色谱法及检测管法对不同模拟放电条件下SF6气体分解产物的生成过程、相对体积分数关系等方面进行研究,寻找表征不同放电故障类型的特征气体,从而得到SF6气体分解产物的变化情况与SF6电气设备故障之间的内在联系。该项研究提出对SF6气体分解产物定量检测以评判电气设备内部状态的理论与方法,对实现SF6电气设备由于放电引起的突发性故障的早期诊断和预测有着重大意义。
苗玉龙, 姚强, 邱妮, 张继菊
doaj  

SF₆电气设备的监督与故障诊断

Gaoya dianqi, 2011
SF6电气设备在电网中的应用越来越广泛,这些设备运行状态的好坏直接关系着电网的安全。根据SF6的化学性质与分解机理,利用SF6气体分解产物可以判断设备故障、推测可能存在缺陷。通过对SF6电气设备的日常监督,统计分析了SF6气体分解产物中特征组分（二氧化硫SO2、氟化亚硫酰SOF2以及硫化氢H2S）的生成情况,并以此为基础总结出了SF6电气设备放电故障诊断标准,提出了不同电压等级SF6电气设备分解产物检测周期。
周舟, 陈绍艺, 龚尚昆, 胡旭, 陶靖   +4 more
doaj  

Viscosity of SF6+N2 and SF6+He gaseous mixtures.

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 1980
YOSHIYUKI TANAKA, MAKOTO NAKAJIMA, HIRONOBU KUBOTA, TADASHI MAKITA   +3 more
openaire   +2 more sources

浅析高压SF₆断路器可靠性研究的特点和难点

Gaoya dianqi, 2013
高压SF6断路器是电网中的重要元件,它对电网运行的可靠性有着重要影响。笔者以高压SF6断路器为分析目标,讨论了高压SF6断路器可靠性研究的目的,并论述了可靠性研究的发展现状。结合高压SF6断路器的技术特点,讨论了高压SF6断路器进行可靠性研究的特点;针对高压SF6断路器的开合、绝缘、载流、静态结构、机构及传动、辅助和控制回路等6个功能模块,分析了对其进行可靠性研究的难点;最后,总结了对高压SF6断路器密封元件进行可靠性评估的可能手段和方法。
魏泉, 成勇, 武星, 宋昕, 骆虎, 刘景博, 贺洲强   +6 more
doaj  

贵州电网SF₆电气设备漏气缺陷分析及管理措施探讨

Gaoya dianqi, 2015
发现了贵州电网多台存在漏气缺陷的SF6电气设备,多维度分析并用气体SF6红外成像检漏仪进行检漏处理。系统地提出SF6气体泄漏设备的管理措施,明确管理人员和多种专业人员任务归属,统一协调,配合作业,杜绝SF6设备泄漏管理的真空区域,为SF6设备漏气缺陷管理指明方向。
张英, 余鹏程, 李军卫, 蒋震, 刘喆, 吴国卿, 胡力力   +6 more
doaj  

Air versus sulfur hexafluoride gas tamponade for small- and medium-sized macular holes in prone and non prone positions: a randomized controlled study. [PDF]

Int J Retina Vitreous
Goel P, Jain T, Agarwal M, Singh S, Mishra DK.   +4 more
europepmc   +1 more source

DFT study of atmospheric characteristics of CF₃SO₂F: the fungibility of the insulation gas of SF₆. [PDF]

RSC Adv
Liu W, Zheng Y, Cui Y, Li D, Yuan Q, Wang K, Cheng L.   +6 more
europepmc   +1 more source