Development and Study of the (Ag)-Ni/Cr Composite Plating with Antibacterial Properties and Corrosion Resistance

　通过正交试验法,在优化电镀工艺条件基础上,开发并研制了一种新型金属表面功能材料(Ag)-Ni/Cr复合镀层,并分别利用菌落计数法和交流阻抗法比较镀层抗菌和耐腐蚀性能.研究表明,该镀层具有抗菌性和耐蚀性兼顾的特点,极具广阔的应用前景.The 3_factor and 3_level orthogonal experiment was designed and through the comparison of the different films' antibacterial properties measured by bacterial colony counting and the corrosion resistance studied with the AC impedance method. The optimal plating conditions of the (Ag)_Ni/Cr composite plating, a novel functional plating, were determined.The results have indicated that the (Ag)_Ni/Cr composite plating is characterized by both antibacterial and corrosion resisting properties and has its wide applied prospect.作者联系地址：上海大学理学院化学系,上海大学生命科学学院,上海大学理学院化学系,上海大学理学院化学系,上海大学理学院化学系 上海200436 ,上海200436 ,上海200436 ,上海200436 ,上海200436Author's Address: 1. Dept. of Chem., College of Science, 2.College of Life & Science, Shanghai Univ., Shanghai 200436, Chin

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies