量子点毒性效应的研究进展

量子点(quantum dots,QDs)作为一种新型的纳米材料已备受关注.由于其独特的荧光特性,量子点已经成功地应用于生命科学等领域.近年来,量子点的生物学毒性效应及其环境影响成为新的研究热点.本文综述了量子点毒性效应的相关研究,并对该领域的前景及研究方向进行了评述和展望.国家自然科学基金重点项目(批准号:20537020);; 国家重点基础研究发展计划(批准号:2003CB415001)资

企业六西格玛管理成熟度评价研究

企业六西格玛管理成熟度评价可以有效地判定在其持续改进过程中的状态,帮助企业的管理活动从"被动反应"向"主动提升"转变。借鉴软件工程、项目管理成熟度的理念,建立了企业六西格玛管理成熟度评价体系,应用网络层次分析法确定各指标的权重,将其成熟度划分为认知级、成长级、规范级和优化级,并通过案例说明了该方法的可行性和有效性

重组人凝血因子Ⅷ治疗411例中重型血友病A患者的抑制物产生及安全性的回顾性分析

目的:分析国内血友病A患者接受第3代重组人凝血因子Ⅷ(FⅧ)替代治疗后FⅧ抑制物产生和相关安全性情况。方法:对411例重型和中型血友病A患者进行回顾性分析。结果:411例血友病A患者均为男性,46例仅接受百因止治疗,包括18例既往未接受过FⅧ治疗(PUP)和28例既往接受过FⅧ治疗(PTP);365例接受百因止与其他FⅧ制剂治疗,包括9例PUP和356例PTP。411例患者中13例(3.2%)报告了抑制物产生阳性,包括27例PUP中的3例(11.1%)和384例PTP中的10例(2.6%)。在365例接受百因止与其他FⅧ制剂治疗的患者中,分别有7例(1.9%)、36例(9.9%)和11(3.0%)报告了乙肝表面抗原阳性、乙肝表面抗体阳性和丙肝表面抗体阳性,同时有9例(2.5%)和1例(0.3%)报告了人类免疫缺陷病毒抗体和梅毒螺旋体抗体阳性。在46例仅接受百因止治疗的患者中,未见病毒学阳性结果。结论:中国血友病A患者接受百因止替代治疗总体安全且耐受性良好,抑制物发生率较低

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