• Title/Summary/Keyword: Science Center

Search Result 39,356, Processing Time 0.065 seconds

A novel ceramic GEM used for neutron detection

  • Zhou, Jianrong;Zhou, Xiaojuan;Zhou, Jianjin;Jiang, Xingfen;Yang, Jianqing;Zhu, Lin;Yang, Wenqin;Yang, Tao;Xu, Hong;Xia, Yuanguang;Yang, Gui-an;Xie, Yuguang;Huang, Chaoqiang;Hu, Bitao;Sun, Zhijia;Chen, Yuanbo
    • Nuclear Engineering and Technology
    • /
    • v.52 no.6
    • /
    • pp.1277-1281
    • /
    • 2020

  • A novel ceramic Gas Electron Multiplier (GEM) has been developed to meet the demand of high counting rate for the neutron detection which is an alternative to 3He-based detector at China Spallation Neutron Source (CSNS). An experiment was performed to measure the neutron transmittance of ceramic-GEM and FR4-GEM at the small angle neutron scattering (SANS) instrument. The result showed the ceramic-GEM has higher transmittance and less self-scattering especially for cold neutrons. One single ceramic GEM could give a gain of 102-104 in the mixture gas of Ar and CO2 (90%:10%) and its energy resolution was about 27.7% by using 55Fe X ray of 5.9 keV. A prototype has been developed in order to investigate the performances of the ceramic GEM-based neutron detector. Several neutron beam tests, including detection efficiency, spatial resolution, two-dimensional imaging, and wavelength spectrum, were carried out at CSNS and China Mianyang Research Reactor (CMRR). The results show that the ceramic GEM-based neutron detector is a good candidate to measure the high intensity neutrons.

  • https://doi.org/10.1016/j.net.2019.11.021 인용 PDF KSCI

Synthesis and Biological Evaluation of 1-Heteroarylmethyl 1,4-Diazepanes Derivatives as Potential T-type Calcium Channel Blockers

  • Ullapu, Punna Reddy;Ku, Su-Jin;Choi, Yeon-Hee;Park, Ji-Yeon;Han, So-Yeop;Baek, Du-Jong;Lee, Jae-Kyun;Pae, Ae-Nim;Min, Sun-Joon;Cho, Yong-Seo
    • Bulletin of the Korean Chemical Society
    • /
    • v.32 no.spc8
    • /
    • pp.3063-3073
    • /
    • 2011

  • The synthesis and biological evaluation of 1-heteroarylmethyl 1,4-diazepane derivatives as potential T-type calcium channel blockers is described. In this study, we have identified the compound 21i exhibiting the most potent T-type calcium channel blocking activity with $IC_{50}$ value of 0.20 ${\mu}M$, which is superior to that of mibefradil.

  • https://doi.org/10.5012/bkcs.2011.32.8.3063 인용 PDF KSCI

Present and Future of Hot Pepper Genomics

  • Kang, Byeong-Cheorl;Nahm, Seok Hyeon;Huh, Jin-Hoe;Yu, Hyun-Sook;Kim, Minwoo;Yoo, Eun Young;Lee, Je Min;Kim, Yong Min;Kim, Shinje;Kim, Byung-Dong
    • The Korea Genome Conference
    • /
    • 2002.08a
    • /
    • pp.38.2-38.2
    • /
    • 2002

  • PDF