一个检测半导体激光器质量的有效方法

对一百支PBC结构的InGaAsP/InP激光器的检测表明,通过变温的电导数及热阻测试给出的参数及参数随温度的变化可对半导体激光器有效地进行质量评价和可靠性筛选

戊型肝炎重组蛋白聚乳酸羟基乙酸微球疫苗的研究

目的:研究戊型肝炎重组蛋白(NE2)聚乳酸羟基乙酸(PLGA)微球疫苗诱导免疫应答的情况。方法:复乳法制备微球,考察粒径分布等特性。通过间接ELISA法检测其诱导BALB/c小鼠体内IgG、IgG2a和IgG1水平,并通过IFN--ELISPOT方法检测其诱导BALB/c小鼠体内抗原特异性免疫应答情况。结果:微球的平均粒径为7.1 m。注射小鼠6周后(第4周加强免疫1次),微球疫苗诱导产生的抗戊型肝炎病毒IgG抗体水平较同剂量铝佐剂组明显升高(间接ELISA:OD450/620 10.09 vs.5.32)。IgG2a抗体量略高于铝佐剂组,OD450/620分别为0.17、0.04。IgG1抗体量明显高于铝佐剂组,OD450/620分别为20.48、15.00。IFN--ELISPOT结果显示,微球疫苗能很好的诱导NE2或P34肽抗原特异性免疫应答。结论:戊型肝炎重组蛋白聚乳酸羟基乙酸微球作为疫苗输送体系能明显的提高抗原的免疫原性,有很好的应用前景

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