荧光光谱法研究紫草素与牛血清白蛋白的相互作用

采用荧光光谱法研究了紫草素和牛血清白蛋白的相互作用.实验结果表明,紫草素对牛血清白蛋白的荧光有明显的猝灭作用,其方式为静态猝灭,紫草素与牛血清白蛋白之间发生了分子内非辐射能量转移;紫草素和牛血清白蛋白的结合位点数为1,结合位置距离212位色氨酸残基1.92nm;温度为22和36℃时,紫草素对牛血清白蛋白荧光的猝灭常数分别为6.96×10^4和5.91×10^4mol/L.热力学分析表明,紫草素与蛋白之间的结合以静电作用力为主.同时,紫草素分子含有多个羟基,它们之间还存在氢键作用力

荧光光谱法研究紫草素与牛血清白蛋白的相互作用

采用荧光光谱法研究了紫草素和牛血清白蛋白的相互作用.实验结果表明,紫草素对牛血清白蛋白的荧光有明显的猝灭作用,其方式为静态猝灭,紫草素与牛血清白蛋白之间发生了分子内非辐射能量转移;紫草素和牛血清白蛋白的结合位点数为1,结合位置距离212位色氨酸残基1.92nm;温度为22和36℃时,紫草素对牛血清白蛋白荧光的猝灭常数分别为6.96×104和5.91×104mol/L.热力学分析表明,紫草素与蛋白之间的结合以静电作用力为主.同时,紫草素分子含有多个羟基,它们之间还存在氢键作用力

荧光光谱法研究紫草素与牛血清白蛋白的相互作用

采用荧光光谱法研究了紫草素和牛血清白蛋白的相互作用.实验结果表明,紫草素对牛血清白蛋白的荧光有明显的猝灭作用,其方式为静态猝灭,紫草素与牛血清白蛋白之间发生了分子内非辐射能量转移;紫草素和牛血清白蛋白的结合位点数为1,结合位置距离212位色氨酸残基1.92nm;温度为22和36℃时,紫草素对牛血清白蛋白荧光的猝灭常数分别为6.96×10^4和5.91×10^4mol/L.热力学分析表明,紫草素与蛋白之间的结合以静电作用力为主.同时,紫草素分子含有多个羟基,它们之间还存在氢键作用力

准噶尔盆地南缘沙生植被恢复与重建技术研究

本成果为国家十一五科技支撑计划课题《准噶尔盆地南缘沙生植被恢复与重建技术研究与示范》(2007BAC17B03,2007年～2010年)的主要内容。 古尔班通古特沙漠是世界著名的温带沙漠,是重要的植物抗逆种质资源库。植被分布对防风固沙,保持天山北坡经济带的可持续发展和新疆政治、经济、文化稳定与繁荣至关重要。但由于垦荒、樵采、放牧、油田工程建设,以及河流断流,导致古尔班通古特沙漠南部植被退货,同时由于植被恢复技术树木成活率过低,因此提出本课题,通过三年研究主要取得以下进展： 1.通过连续三年试验,总结出沙丘阴坡、阳坡、丘间平地等3种不同立地条件的梭梭免灌造林技术,沙丘顶部活化..

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