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185nm UV降解水中4-CP、4-NP和RhB的研究 被引量:1
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作者 闻瑞梅 邓守权 《感光科学与光化学》 EI CAS CSCD 2007年第1期1-11,共11页
本文以对氯苯酚(4-CP)、对硝基苯酚(4-NP)和罗丹明B(Rh B)为模型有机物(以4-CP和4-NP为小分子模型有机物,以Rh B为大分子模型有机物),分别研究了185 nm UV对水中这3种模型有机物的降解规律、性能和效果.研究结果表明,185 nm UV直接对水... 本文以对氯苯酚(4-CP)、对硝基苯酚(4-NP)和罗丹明B(Rh B)为模型有机物(以4-CP和4-NP为小分子模型有机物,以Rh B为大分子模型有机物),分别研究了185 nm UV对水中这3种模型有机物的降解规律、性能和效果.研究结果表明,185 nm UV直接对水中4-CP、4-NP和Rh B有很好的降解效果.研究内容包括:185 nm UV降解模型有机物的浓度、TOC(Total organic carbon)浓度、185 nm UV降解模型有机物过程中溶液pH及电导率变化、以及降解模型有机物过程中产生的无机离子等几个方面. 展开更多
关键词 废水 对氯苯酚 对硝基苯酚 罗丹明B 降解 总有机碳 185 nmUV
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SOI MOSFET抗辐射加固的常用方法与新结构 被引量:9
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作者 何玉娟 刘洁 +2 位作者 恩云飞 罗宏伟 师谦 《半导体技术》 CAS CSCD 北大核心 2008年第3期223-226,共4页
SOI CMOS技术存在许多优势,但由于存在厚的埋氧层,其总剂量效应反而比体Si器件更差,因此需进行总剂量抗辐射加固设计。对几种SOI MOSFET的栅氧、埋氧和场氧总剂量抗辐射加固的方法进行了对比较分析,指出了各自的优劣势,给出了研究方向... SOI CMOS技术存在许多优势,但由于存在厚的埋氧层,其总剂量效应反而比体Si器件更差,因此需进行总剂量抗辐射加固设计。对几种SOI MOSFET的栅氧、埋氧和场氧总剂量抗辐射加固的方法进行了对比较分析,指出了各自的优劣势,给出了研究方向。并对FLEXFET和G4-FET三维SOI器件抗辐射加固新结构进行了阐述,分析了其优越性。 展开更多
关键词 SOI 总剂量效应 FLEXFET G^4-FET
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Enhancement of antitumor immunity by low-dose total body irradiation is associated with selectively decreasing the proportion and number of T regulatory cells 被引量:12
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作者 Shudao Xiong Lei Zhang Yiwei Chu 《Cellular & Molecular Immunology》 SCIE CAS CSCD 2010年第2期157-162,共6页
Low-dose total body irradiation (LTBI) is used in the treatment of some cancers mainly for immune enhancement rather than cell killing. However, the mechanism underlying LTBI remains unknown. In this study, by analy... Low-dose total body irradiation (LTBI) is used in the treatment of some cancers mainly for immune enhancement rather than cell killing. However, the mechanism underlying LTBI remains unknown. In this study, by analyzing the immune patterns of lymphocytes, we found that the percentage and absolute number of CD4^+CD25^+Foxp3^+ regulatory T cells are markedly decreased in naive mice following treatment with LTBI. On the contrary, the CD4^+CD44^+/CD8^+CD44^+ effector-memory T cells are greatly increased. Importantly, naive mice treated with dendritic cell-gp100 tumor vaccines under LTBI induced an enhancement of antigen-specific proliferation and cytotoxicity as well as interferon-γ, (IFN-γ) secretion against FIO melanoma tumor challenge, compared to treatment with either the tumor vaccine or LTBI alone. Consequently, the treatment resulted in a reduced tumor burden and prolonged mouse survival. Our data demonstrate that LTBI's enhancement of antitumor immunity was mainly associated with selectively decreasing the proportion and number of T regulatory cells, implying the potential application of the combination of LTBI and a tumor vaccine in antitumor therapy. 展开更多
关键词 CD4^+CD25^+Foxp3^+ T cells CD4^+CD44^+/CD8^+CD44^+ effector-memory T cells low-dose total body irradiation LTBI tumor vaccine
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