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大同石炭系煤高灰半焦浮选脱灰研究 期刊论文  OAI收割
选煤技术, 2022, 卷号: 50, 期号: 01, 页码: 30-33
作者:  
陆鹏飞;  田利军;  武荣成;  许光文
  |  收藏  |  浏览/下载:0/0  |  提交时间:2023/06/08
N-Octanol-Induced Phase Separation of Triton X-100 for the Extraction of Trace Silver from Environmental Samples with Flame Atomic Absorption Spectrometric Determination 期刊论文  OAI收割
JOURNAL OF THE CHEMICAL SOCIETY OF PAKISTAN, 2020, 卷号: 42
作者:  
Xu, Juncui;  Xie, Fazhi;  Yue, Xianming;  Li, Zhengyu;  Geng, Shixiong
  |  收藏  |  浏览/下载:31/0  |  提交时间:2020/10/26
Surfactant-assisted electrodeposition of Au-Co/WS2 self-lubricating coating from WS2 suspended cyanide electrolyte 期刊论文  OAI收割
JOURNAL OF ALLOYS AND COMPOUNDS, 2020, 卷号: 829
作者:  
Chen, Zhaoxi;  Wagner, Julien;  Turq, Viviane;  Hillairet, Julien;  Taberna, Pierre-Louis
  |  收藏  |  浏览/下载:47/0  |  提交时间:2020/11/26
An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242 期刊论文  OAI收割
Astronomy and Astrophysics, 2020, 卷号: 641, 页码: A101
作者:  
HXMT
  |  收藏  |  浏览/下载:61/0  |  提交时间:2022/02/08
accretion  accretion disks  black hole physics  X-rays: binaries  time  Astrophysics - High Energy Astrophysical Phenomena  Abstract:
Aims: Flip-flops are top-hat-like X-ray flux variations, which have been observed in some transient accreting black hole binary systems, and feature simultaneous changes in the spectral hardness and the power density spectrum (PDS). They occur at a crucial time in the evolution of these systems, when the accretion disc emission starts to dominate over coronal emission. Flip-flops remain a poorly understood phenomenon, so we aim to thoroughly investigate them in a system featuring several such transitions.
Methods: Within the multitude of observations of Swift J1658.2-4242 during its outburst in early 2018, we detected 15 flip-flops, enabling a detailed analysis of their individual properties and the differences between them. We present observations by XMM-Newton, NuSTAR, Astrosat, Swift, Insight-HXMT, INTEGRAL, and ATCA. We analysed their light curves, searched for periodicities, computed their PDSs, and fitted their X-ray spectra, to investigate the source behaviour during flip-flop transitions and how the interval featuring flip-flops differs from the rest of the outburst.
Results: The flip-flops of Swift J1658.2-4242 are of an extreme variety, exhibiting flux differences of up to 77% within 100 s, which is much larger than what has been seen previously. We observed radical changes in the PDS simultaneous with the sharp flux variations, featuring transitions between the quasi-periodic oscillation types C and A, which have never been observed before. Changes in the PDS are delayed, but more rapid than changes in the light curve. Flip-flops occur in two intervals within the outburst, separated by about two weeks in which these phenomena were not seen. Transitions between the two flip-flop states occurred at random integer multiples of a fundamental period of 2.761 ks in the first interval and 2.61 ks in the second. Spectral analysis reveals the high and low flux flip-flop states to be very similar, but distinct from intervals lacking flip-flops. A change of the inner temperature of the accretion disc is responsible for most of the flux difference in the flip-flops. We also highlight the importance of correcting for the influence of the dust scattering halo on the X-ray spectra.
  
Photoinduced Decomposition of Formaldehyde on Rutile TiO2(100)-(1x1) 期刊论文  OAI收割
CHINESE JOURNAL OF CHEMICAL PHYSICS, 2018, 卷号: 31, 期号: 4, 页码: 547-554
作者:  
Dai, Dong-xu;  Yang, Xue-ming;  Chen, Xiao;  Li, Fang-Liang;  Guo, Qing
  |  收藏  |  浏览/下载:28/0  |  提交时间:2019/06/20
Interpreting microbiologically assisted cracking with E-e-pH diagrams 期刊论文  OAI收割
BIOELECTROCHEMISTRY, 2018, 卷号: 120, 页码: 57-65
作者:  
Wu, TQ;  Sun, C;  Ke, W;  Wu, TQ (reprint author), Xiangtan Univ, Sch Mat Sci & Engn, Key Lab Mat Design & Preparat Technol Hunan Prov, Xiangtan 411105, Peoples R China.
  |  收藏  |  浏览/下载:55/0  |  提交时间:2018/06/05
High level extracellular production of a recombinant alkaline catalase in E-coli BL21 under ethanol stress and its application in hydrogen peroxide removal after cotton fabrics bleaching 期刊论文  OAI收割
BIORESOURCE TECHNOLOGY, 2016, 卷号: 214, 页码: 303-310
作者:  
Yu, Zhenxiao;  Zheng, Hongchen;  Zhao, Xingya;  Li, Shufang;  Xu, Jianyong
收藏  |  浏览/下载:33/0  |  提交时间:2017/03/21
High level extracellular production of a truncated alkaline beta-mannanase from alkaliphilic Bacillus sp N16-5 in Escherichia coli by the optimization of induction condition and fed-batch fermentation 期刊论文  OAI收割
JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY, 2016, 卷号: 43, 期号: 7, 页码: 977-987
作者:  
Zheng, Hongchen;  Yu, Zhenxiao;  Fu, Xiaoping;  Li, Shufang;  Xu, Jianyong
收藏  |  浏览/下载:33/0  |  提交时间:2017/03/21
The status of molybdenum ions in the lead dioxide-lead glasses and vitroceramics 期刊论文  OAI收割
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2016, 卷号: 453, 页码: 36-41
作者:  
Suciu, RC;  Rada, M;  Culea, E;  Biris, A;  Rada, S
  |  收藏  |  浏览/下载:36/0  |  提交时间:2017/07/24
硫酸盐还原菌对红壤中X100管线钢腐蚀行为的影响 期刊论文  OAI收割
全面腐蚀控制, 2015, 期号: 9
祝烺贤; 龚喆; 吴堂清; 许进; 闫茂成; 孙成
收藏  |  浏览/下载:26/0  |  提交时间:2016/04/19