目的:观察甘草次酸对C57BL/6小鼠急性放射性肺损伤的保护效应。方法:成年C57BL/6雌性小鼠90只,随机数字表法分为3组,每组30只:空白对照组:未照射+生理盐水10 m L/kg灌胃;单纯照射组:照射+生理盐水10 m L/kg灌胃;甘草次酸组:照射+甘草次...目的:观察甘草次酸对C57BL/6小鼠急性放射性肺损伤的保护效应。方法:成年C57BL/6雌性小鼠90只,随机数字表法分为3组,每组30只:空白对照组:未照射+生理盐水10 m L/kg灌胃;单纯照射组:照射+生理盐水10 m L/kg灌胃;甘草次酸组:照射+甘草次酸40 mg/kg灌胃。单纯照射组和甘草次酸组小鼠予6MV-X线12Gy全肺单次照射。照射前30 min给药一次,以后1次/d连续7 d后改为隔日给药,直至照射后一个月。照射后第2、17、30天随机从各组分别选取10只小鼠处死。取双侧肺组织行HE染色、Masson染色观察肺组织形态变化。结果:空白对照组小鼠肺组织结构正常。单纯照射组小鼠肺组织在照射后第2天、17天以渗出为主,肺泡腔及间隔可见渗出、充血,伴有炎症细胞的浸润。照射后第30天,肺泡壁间隔增宽、肺泡结构变形、炎性细胞浸润,并可见胶原纤维沉积。甘草次酸组在不同时间点,肺泡炎及胶原沉积的情况均较单纯照射组改善,任一时间点两组之间差异有统计学意义(P<0.05)。结论:甘草次酸能够改善急性放射性肺损伤小鼠的一般情况,减轻肺组织炎症反应及改善胶原沉积。展开更多
This paper focuses on data processing for incomplete measurement of trajectory (IMT) in aerospace measurement and control. The IMT means that the principal equipment loses the measured data during some intervals so th...This paper focuses on data processing for incomplete measurement of trajectory (IMT) in aerospace measurement and control. The IMT means that the principal equipment loses the measured data during some intervals so that trajectory parameters (position, velocity, etc.) cannot be determined independently. Based on a joint model for trajectory estimation with reduced parameter, a fusion way is put forth by making full use of measured data from auxiliary equipment with lower precision. In the superposition intervals of measurement between principal and auxiliary equipment, the technique of diagnosing and estimating system errors is applied to improving the estimate precision of trajectory parameters (TP) and determining the precision after data fusion. In practical test, this method operates so successfully that it can not only provide complete TP but improve their precision remarkably. Meanwhile, this way is also applicable to other problems of incomplete measurement.展开更多
文摘目的:观察甘草次酸对C57BL/6小鼠急性放射性肺损伤的保护效应。方法:成年C57BL/6雌性小鼠90只,随机数字表法分为3组,每组30只:空白对照组:未照射+生理盐水10 m L/kg灌胃;单纯照射组:照射+生理盐水10 m L/kg灌胃;甘草次酸组:照射+甘草次酸40 mg/kg灌胃。单纯照射组和甘草次酸组小鼠予6MV-X线12Gy全肺单次照射。照射前30 min给药一次,以后1次/d连续7 d后改为隔日给药,直至照射后一个月。照射后第2、17、30天随机从各组分别选取10只小鼠处死。取双侧肺组织行HE染色、Masson染色观察肺组织形态变化。结果:空白对照组小鼠肺组织结构正常。单纯照射组小鼠肺组织在照射后第2天、17天以渗出为主,肺泡腔及间隔可见渗出、充血,伴有炎症细胞的浸润。照射后第30天,肺泡壁间隔增宽、肺泡结构变形、炎性细胞浸润,并可见胶原纤维沉积。甘草次酸组在不同时间点,肺泡炎及胶原沉积的情况均较单纯照射组改善,任一时间点两组之间差异有统计学意义(P<0.05)。结论:甘草次酸能够改善急性放射性肺损伤小鼠的一般情况,减轻肺组织炎症反应及改善胶原沉积。
基金the National Natural Science Fvmdation of China (Grant No. 69872039).
文摘This paper focuses on data processing for incomplete measurement of trajectory (IMT) in aerospace measurement and control. The IMT means that the principal equipment loses the measured data during some intervals so that trajectory parameters (position, velocity, etc.) cannot be determined independently. Based on a joint model for trajectory estimation with reduced parameter, a fusion way is put forth by making full use of measured data from auxiliary equipment with lower precision. In the superposition intervals of measurement between principal and auxiliary equipment, the technique of diagnosing and estimating system errors is applied to improving the estimate precision of trajectory parameters (TP) and determining the precision after data fusion. In practical test, this method operates so successfully that it can not only provide complete TP but improve their precision remarkably. Meanwhile, this way is also applicable to other problems of incomplete measurement.
