Results 91 to 100 of about 651 (153)
Zhongshan Daxue xuebao. Yixue kexue ban, 2011 【目的】 初步调查介入放射治疗的患者术中所受X射线辐射的剂量并探讨降低辐射的方法【方法】 采用DSA 机配置的穿透电离室型剂量监测系统(AEP),实时读取记录947名患者在1651例次介入放射操作中的透视时间摄影帧数面积-剂量乘积(DAP)和入射表面剂量(ESD),运用秩和检验关联性分析及线性回归分析等统计学方法分析以上数据,比较分析各种不同类型患者介入操作辐射数据的差异性及相互关系【结果】 患者的透视时间摄影帧数DAPESD的均值分别为(13.5 ± 12.1) min(230 ± 180)帧(194
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Dianci bileiqi, 2018 针对正负地闪准确区分识别技术手段较难的缺陷,对闪电电场的波形进行了分析,对地闪回击波形的参数特征进行了分析和统计,并研究闪电放电类型的自动识别。利用时间分辨率为50 ns的快天线电场变化和126 MHz甚高频（VHF）辐射资料,对雷暴过程中闪电的波形进行时域特征分析。通过对闪电电场波形数据的分析,给出了识别地闪回击的依据,设定回击的上升时间在120μs之间,下降时间在2.5500μs之间,编写程序实现回击的自动识别,并进行了实际测试。结果表明,自动识别程序对负地闪回击的识别效率可达95 ...
赵冲, 王宁, 张瑾
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Radon concentration and related employees’ chromosome aberration and micronuclei in subways in a city of Zhejiang Province [PDF]
BackgroundExcessive radon exposure is considered the second risk factor for lung cancer. Since the opening of the subway in a city of Zhejiang Province, the exposure level of radioactive gas radon in subway stations and its impact on occupational health ...
Donghang WANG +9 more
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Dianci bileiqi, 2017 针对传输线耦合雷电电磁波形成过电压对电子设备造成干扰及损坏的问题,将雷电闪电通道等效为辐射线天线,建立雷电回击通道、传输线、大地一体化模型,利用传输线模型所得理论推导公式与试验相结合的方法,对传输线耦合自然界雷电与模拟雷电进行对比分析,并计算了传输线耦合雷电电磁波形成过电压波形的幅值及能量。得出:当雷电回击通道中雷电流在5 kA45 kA范围时,传输线耦合雷电电磁波形成的过电压幅值与雷电流大小呈较好的线性关系,耦合的能量与雷电流大小呈幂函数关系;雷电过电压在传输线传输过程中激励出高频分量电压 ...
兰海燕
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Stress Response of Bidens pilosa L. to Uranium in Soil Influenced by Chelating Agents and Its Mechanism [PDF]
Phytoremediation is an environmentally friendly and highly promising method for soil remediation, with the core issue being the selection of suitable plants and applicable conditions.
WU Renjie1, 2, , LIU Yi1, , LI Jianguo2, ,
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Investigation of occupational hazards of indium tin oxide in a LCD display manufacturer [PDF]
, 2023 WU Chuandong, ZHU Qixing
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Zhongshan Daxue xuebao. Yixue kexue ban, 1997 摘 要 用60Co 放射纯系NIH 雄性小白鼠, 放射前10 ～ 20 min 每鼠腹腔注射黄芩水提物(AESBG)0 .7 g/ kg 或1 .4 g/ kg , 能显著提高1 次全身放射8 .7 ～ 9 .1 Gy 小鼠的生存防护效力和30 d 存活率;每鼠1 .4 g/ kg 全 身放射4 .7 Gy 后第5 天显著提高白细胞数, 第11 天脾重、白细胞和血小板均有明显增加。结果表明AESBG 有 显著的放射损伤防护作用。
利国威 雷穗妮 陈昆田 黄晓延
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[Research Progress on the Protective Effect of Intestinal Flora on Radiation-induced Lung Injury in Thoracic Tumors]. [PDF]
Zhongguo Fei Ai Za Zhi, 2023 Liu G, E M.
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[Effects of Ionizing Radiation on Intestinal Bile Acid Metabolism: Mechanism of the Radioprotective Effect of Glycoursodeoxycholic Acid]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanDai J, Gao Y, Wang J, Zhang S, Liu P.
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