查询词典 radioactivity

"Radioactivity: Property exhibited by certain types of matter of emit ting radiation spontaneously. The phenomenon was first reported in 1896 by Henri Becquerel for a uranium salt, and it was soon found that all uranium compounds are radioactive due to the uranium's radioactivity."

放射性：某些类的物质自发发射辐射的特性。1896年贝克勒耳第一个报告在铀盐中发现了这一现象，不久发现由于铀有放射性，所以所有的铀化合物都是放射性的。

It is estimated that the lifetime dose of radioactivity to which a person eating irradiated food could be exposed could realistically amount to no more than one-millionth of the recognised limit of average exposure of an individual to radioactivity from other sources over the same period.

据估计，人们由于吃进辐射食物所遭受的放射剂量，实际上不多于同一时期一个人平均可能遭受到的来自其它放射源的、可觉察的放射的极限的百万份之一。

The lifetime dose of radioactivity to which a person eating irradiated food could be expose d could realistically amount to one-millionth of the recognised limit of average exposure of an individual to radioactivity from other source over the same period.

人们由于吃进辐照食物所遭受的放射剂量，实际上不多于同一时期一个人平均可能遭受到的来自其它放射源的放射的可觉察的极限的百万份之一。

The lifetime dose of radioactivity to which a person eating irradiated food could be exposed could realistically amount to one-millionth of the recognised limit of average exposure of an individual to radioactivity from other source over the same period.

人们由于吃进辐照食物所遭受的放射剂量，实际上不多于同一时期一个人平均可能遭受到的来自其它放射源的放射的可觉察的极限的百万份之一。

With irradiated by ^60Co-γ ray of 10GY, rates radioactivity of SOD and POD were highest, and rate radioactivity of PPO was secondary, and rate radioactivity of CAT and the content of malondialdehyde were eighthly.

因此，综合此5项生理指标的生理生化功能，一品红的此4种保护酶活力和丙二醛含量以10GY辐射处理的表现较为适中。

The results showed that there were prominently positive correlations between rates radioactivity of SOD and POD and a good minus correlation between rates radioactivity of SOD and PPO. With irradiated by 60Co-γ ray of 10GY, rates radioactivity of SOD and POD were highest, and rate radioactivity of PPO was secondary, and rate radioactivity of CAT and the content of malondialdehyde were eighthly.

结果表明，SOD酶活力与POD酶活力之间呈显著正相关R=0.656(上标*，SOD比活力与PPO酶活力、PPO比活力之间呈极显著负相关R=-0.716(上标*， R=-0.714；SOD酶活力、POD酶活力以10GY辐射处理值最高，10GY辐射处理的PPO酶活力居第2，丙二醛含量及CAT酶活力居第8。

Hours after infusion, the radioactivity accumulation appeared in lung, and it revealed that the infused cells distributed mainly in lung, and some appeared in liver, spleen, kidney and bladder. 6 hours after infusion, the radioactivity in lung diminished compared with that at 3 hours after infusion, and bilateral kidneys imagine appeared intensively. 9 hours after infusion, the radioactivity in lung appeared reduced significantly than that at 3 hours after infusion, and liver imagined increasedly, intestine tract imagine appeared in several rats.

本研究中，静脉移植MSCs后3h，肺脏放射性浓集，移植细胞主要分布在双侧肺部，肝脏、脾脏、肾脏和膀胱分布较少；移植6h后，肺脏放射性较移植3h时减弱，双侧肾脏显像明显增强；移植9h后，肺脏放射性较移植3h时明显减弱，肝脏显像增强，个别大鼠肠道出现显像；移植18h后，此时肺脏显像明显稀疏，肝脏和脾脏显像显著加强。

In conventional indirected parameter estimate, such as Weighted Least Square Method, the changing activity of the injected radiotracer is conventionally measured through multiple consecutive PET image reconstructions. The image of the radioactivity distribution in each frame is reconstructed independently and the whole set of frames is then used to estimate the distribution of the physiological parameter of interest by the application of an appropriate pharmacokinetic model to the time radioactivity curve either of appropriately selected functional regions or of each image element.

传统的间接参数估计方法如加权最小二乘参数估计方法(Weighted Least SquareMethod，WLS)，需要首先从测量数据重建出PET动态放射性活度图像，然后在这些时间上连续的重建图像应用适当的动力学模型上估计感兴趣的生理参数，然而PET重建图像中往往含有极大的噪声，这些噪声将影响参数估计的准确性。

Methods Through 99mTcO4- nuclein imaging of thyroid to 321 patients with subacute thyroiditis.Dealing with imaging to compare the radioactivity count of jaw gland and the radioactivity count of thyroid.

对321例亚急性甲状腺炎患者进行99mTcO4-甲状腺核素显像，通过影像处理计算颌下腺放射性计数/甲状腺放射性计数的比值。

Radioactivity of 〓Tc-MIBI incepted by A549DDP cells in controlling group, Rh2 group, DDP group and Rh2＋DDP group account for 0.94%, 1. 08%, 1. 13% and 2. 0% respectively of the total radioactivity. There was evident difference between the former three groups and Rh2＋DDP group P＜(0.05 . Radioactivity of 〓Tc-MIBI incepted by A549 cells was 2. 38% of the total radioactivity, obviously higher than that in controlling group (P ＜O. 05). conclusions: gensenoside Rh2 of no toxicity concentration can reverse resistance of lung adenocarcinoma A549DDP cells to cisplatin.

对照组的A549DDP细胞摄取〓Tc-MIBI的放射性活性与总放射性活性的百分比为0.94%为，Rh2组的A549DDP细胞摄取〓Tc-MIBI的放射性活性与总放射性活性的百分比为1.08%，DDP组的A549DDP细胞摄取〓Tc-MIBI的放射性活性与总放射性活性的百分比为1.13%，这两组分别与对照组比较无显著性差别（P＞0.05）；Rh2+DDP组的A549DDP细胞摄取。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。