摘要：PandaX is a large liquid-xenon detector experiment usable for direct dark-matter detection and 136Xe double-beta decay *** central vessel was designed to accommodate a staged target volume increase from initially 120 kg(stage I)to 0.5 t(stage II)and eventually to a multi-ton *** experiment is located in the Jinping Deep-Underground Laboratory in Sichuan,*** detector operates in dual-phase mode,allowing detection of both prompt scintillation,and ionization charge through proportional *** this paper a detailed description of the stage I detector design and performance as well as results established during the commissioning phase are presented.

摘要：设计合成了一种四足针尖状铁钯纳米颗粒(简称TFPs),分别通过诱导乳腺癌细胞自噬和巨噬细胞释放促炎因子,实现在光声成像引导下的乳腺肿瘤细胞铁死亡协同免疫治疗.首先,该新型TFPs具有优异的光学吸收和较高的光热转换效率,是良好的光声成像造影剂.其次,TFPs具有过氧化物酶/谷胱甘肽氧化酶模拟酶性能,能原位催化肿瘤区过表达过氧化氢,产生羟基自由基,并同时下调胞内谷胱甘肽水平,协同诱导细胞铁死亡.此外,其独特的针状形态可以进一步触发肿瘤细胞自噬,加快铁蛋白降解,释放铁离子,进而增效铁死亡;同时,特殊的尖状结构能触发巨噬细胞释放促炎细胞因子,增效放大免疫效应,在与PD-L1检查点抑制剂联合使用后,取得最强的抗肿瘤效果.这项工作不仅开发了一种高效的铁死亡诱导剂,也为在纳米尺度调控肿瘤细胞自噬/免疫功能提供了一种全新的策略.