查询词典 lethal dose

The ionization chamber in a water phantom was used to measure the central point dose and another point dose.

用电离室和水箱验证等中心和偏离点的绝对剂量。

Objective: To study the distribution of dose rate on cultured cell plane delivered by 125I seed planar irradiation, and to establish a reference table on dose rate of 125 I seed planar irradiator for cell lines in vitro.

研究内容分以下五部分：第一部分 125I 籽源体外照射细胞的剂量分布研究目的研究 I 籽源体外照射的细胞平面剂量分布，建立 I 籽源体外照射 125 125 细胞剂量率参考模式表。

According to the arrange characteristic of irradiation source on the palling plate this paper deduces the equation calculating dose field The problem in calculating dose field of irradiator is solved with computer program The calculation values are in accordance with the measurement values .

自编程序解决了栅板源剂量场的计算问题，同时将计算值与实测值进行了比较，两者符合得很好。

NGF had obvious cytotoxicity on these cell lines ,which shows to be dose-dependent, especially for MGC-803 and BEL-7404 ,their IC_(50) value at the 24~ hours are 49.9mg/L and 55.46mg/L ; Main features of apoptosis under fluorescent microscope include reduction in volume,nuclear chromatin condensation, intensification under jacinth fluorescence; The early apoptosis rate of pristine cells which detected by FCM increases with NGF dose increasing.

2NGF对4种人肿瘤细胞均有细胞毒性作用，且呈剂量依赖关系，尤其是对MGC-803和BEL-7404的抑制作用更强，作用24h的IC50值分别为49.9mg/L和55.46mg/L，荧光显微镜下可观察到MGC-803凋亡细胞的主要特点为：细胞体积缩小，染色质固缩，橘红色荧光增强；流式细胞仪检测到MGC-803细胞的早期凋亡率随NGF浓度的增高而增加，各浓度组与对照组的早期细胞凋亡率比较有明显差异(P＜0.01)。

Three of them had right breast cancer and remainder had left breast cancer. For each patient, three-dimensional calculations were performed using full set Computer Tomography-slices. All calculations were done using 6MV-photon. The dose distribution of planning target volumes and critical organ were analyzed. Result: Both 3D and FIF technique provided acceptable planning target volumes coverage with 90% of the PTV receiving 100% of the prescribed dose in all cases.

本研究收集六位乳癌病人，其中包含三位左侧乳癌和三位右侧乳癌，每位病人都接受电脑断层摄影治疗规划，分别以3D和FIF两种技术做治疗计划，分析并比较其计划治疗体积和重要器官的剂量分布。

The livability of fetus in high-dose and medium dose groups was lower than that in the control group.

高剂量组、中剂量组的活胎率低于对照组。

The results suggest that UK dose is the key for lytic efficacy,and the optimal and safe dose of UK required to lyse 1 ml of clotted blood would be 20 000-30 000 U/ml.

UK剂量是影响溶凝效果的关键因素，20 000~30 000 U/ml的UK为最佳安全剂量。

Objective To observe the dose-rate effects of adaptive response of thymocyte DNA lysis induced by low dose radiation.

目的：观察低剂量辐射诱导胸腺细胞DNA裂解适应性反应的剂量率效应。

The typical apoptotic morphological features appeared in MUTZ-1 cells treated with 4mmol/L VPA for 72hours. Pyknosis of cells and nuclei, disintegration of nuclear chromatin and apoptotic body could be observed by light microscopy. Aggregation and margination of nuclear chromatin, concentration of plasm, increment of density and chromatin mass of irregular size could be observed by transmission electronmicroscope. The flow cytometric analysis indicated that the VPA could induce cell apoptosis, apoptosis rate increased in dose-dependent manner, ratio of cells at G0/G1 phase increased and ratio of cells at S phase decreased in dose-dependent manner, the cells were arrested at G0/G1 phase.

结果显示：VPA对MUTZ-1细胞的生长抑制作用呈现时间和剂量依赖性；经4mmol/LVPA处理MUTZ-1细胞72小时后，细胞呈现典型的凋亡形态特征，光学显微镜下可见凋亡细胞胞体固缩、核固缩、核碎裂及凋亡小体；透射电子显微镜下可见凋亡细胞核染色质边集、胞浆浓缩、密度增加，胞装内大小不规则的染色质团块；流式细胞术结果表明，细胞凋亡率随着VPA浓度的增加而逐步增高，G0/G1期细胞比例随着VPA浓度的增加而逐渐增多，S期细胞比例逐渐减低，细胞被阻滞在G0/G1期。

The surface activity dose joins the queen, since jointly there is the water loving base group in the surface activity dose and detest the water base group in molecular structure , the pole is as a result easy to wind notable lessening menstruum surface tension from inside transition to interface in the solution.

液体分子在和空气等接触的表面会形成一层特殊的结构，表现为表面张力或表面能。表面活性剂加入后，由于表面活性剂分子结构中合有亲水基团和憎水基团，因而在溶液中极易从内部跃迁到界面上显著降低溶剂的表面张力。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。