查询词典 irradiation

A numerical model was established by combining the seven-flux model of light propagation with the two-dimensional hyperbolic heat conduction model in cylindrical coordinates. It showed that there exists a great discrepancy between the results obtained by treating the laser irradiation as volumetric absorption (i.e. taking laser scattering and absorption into consideration) and those obtained by treating the laser irradiation as the second boundary condition.

将激光传输的七流模型与圆柱坐标系内的二维双曲型导热模型相结合建立了理论模型；将激光照射处理为容积吸收(即考虑激光在生物组织中的散射和吸收)所得到的计算结果，与将激光照射处理为第二类传热边界条件所得到的计算结果相比，两者差别很大；考察了激光照射下散射系数和吸收系数对生物组织内双曲型导热的影响。

MAIN OUTCOME MEASURES: The mass ratio of mouse testis prior to and after irradiation, and the changes of seminiferous tubules prior to and after irradiation.

主要观察指标：正常小鼠睾丸质量与照射后睾丸的质量之比；正常睾丸组织生精小管与照射后睾丸生精小管结构的变化的对比。

The results indicated that the suitable dosage for seed irradiation of caper spurge was about 600Gy,and the peak value of SOD and CAT activities in caper spurge M_1 seedlings could be used for evaluation the suitable dosage for seed irradiation.

本研究初步认为续随子的适宜辐照剂量应在600Gy左右。M1代幼苗体内SOD及CAT活性峰值可作为续随子适宜辐照剂量的判定依据。

That the survival fractions of fractional irradiation were higher than that of single irradiation for all of the three kinds of cells and it indicated that in 6 hours all of the three kinds of cells had high repair ability to sublethal damage.

在0～6Gy的小剂量范围内，6h分次照射的细胞存活率明显高于单次照射。结论在6h之内，三种组织来源的肿瘤细胞都存在亚致死损伤修复。

Result That the survival fractions of fractional irradiation were higher than that of single irradiation for all of the three kinds of cells and it indicated that in 6 hours all of the three kinds of cells had high repair ability to sublethal damage.

结果 在0～6Gy的小剂量范围内，6h分次照射的细胞存活率明显高于单次照射。结论在6h之内，三种组织来源的肿瘤细胞都存在亚致死损伤修复。

METHODS: CNE-2 human nasopharyngeal carcinoma cells were exposed repeatedly to γ-rays and then screened for a new radioresistant subline named CNE-2R. Double times of CNE-2 and CNE-2R cells were determined by MTT assays. The relative radiosensitivities of tumor cells were assessed by standard colony formation assays. Survival rates after exposed to irradiation were measured by MTT assays. The time courses of cell cycle distribution before and after irradiation were investigated by flow cytometry.

用γ射线反复照射CNE-2细胞，筛选出放射抗拒细胞株CNE-2R；检测细胞生长的倍增时间；应用细胞克隆形成实验检测细胞的放射敏感性；MTT法检测照射后不同时间的存活分数；用流式细胞术检测细胞的周期分布特征。

A marked accumulation of cells in G2/M phase was observed in CNE-2R cells during the period from 12 to 36 h after irradiation A little increase of cells in G2/M phase was observed in CNE-2 cells from 12 to 24 h after irradiation. CONCLUSION: The new subline CNE-2R is more radioresistant comparable to its parental CNE-2R cell line, and has a different cell cycle distribution.

人鼻咽癌细胞株CNE-2经间歇性大剂量γ射线多次照射后得到的CNE-2R具有稳定放射抗拒性，并且显示出与亲代不同的细胞周期特征。

The inhibition effects became stronger with the increase of the irradiation dose. Semi-lethal dose of Ailanthus altissima Swingle seeds was 50Gy. 50~75Gy could be considered as the proper dose for seed irradiation treatment of Ailanthus altissima Swingle.

结果表明：辐照抑制了种子的萌发，成苗率下降，幼苗生长受到抑制，且随着剂量的增加，抑制作用增强；椿树种子的半致死剂量为50Gy，适宜辐照剂量为50~75Gy。

One patient received Whipple surgery before local irradiation, and one received chemotherapy prior to local irradiation.

有一位病人在接受局部放射线治疗前先接受了Whipple手术，还有一位病人在治疗前先接受化学治疗。

Results Using two methods, i.e., the mathematical simulation and las er surgery experiment the depth of thermal damage induced by laser irradiation i n biological tissues was determined. The CO2 laser power output was 1.50 W, 3 .15 W and 8.01 W, respectively, and irradiation time was 9-20 s. The avera ge value of relative deviation which represents the departure of the numerical s olution from the experimental result was 3.60%.

结果 当CO2激光功率分别为1.50、3.15和8.01 W，每种功率进行两种不同作用时间（9～20 s）的情况下，用激光医学实验和数学模拟计算两种方法去确定猪肌肉组织的热损伤深度，两者相对偏差的平均值为3.60%，最大相对偏差值为5.59%。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。