核素

Contaminants and pollutants studied included toxic heavy metals, organic pesticides, oil, and radio nuclides.

污染物和污染源的研究包括有毒重金属、有机杀虫剂、石油、放射性核素。

Key words: head and neck neoplasms;nitriles;radionuclide imaging

头颈部肿瘤；腈类；放射性核素显像

Objective to appraise the diagnostic value of Exercise stress test and exercise single-photon emission computed tomography to coronary artery disease.

目的评价运动负荷心电图试验、运动负荷心肌灌注核素显像对冠状动脉病变的诊断价值。

Methods:Radionuclide gastric emptying were performed in 46 cases of FD patients and 24 healthy subjects.The test meal containing 200μci of sulfate colloid (500 kcal) were given.

我们对46例FD患者及24名健康人进行了核素胃排空检查，观察2小时胃排空率及半排空时间。

After 16 weeks treatment there are different improvements in patients'clinical expression, pain symptoms, blood sedimentation test in laboratory, CRP test and wrist joints' bone video picture ROI with isotope 99Tcm-MDP.

经16周初步临床治疗应用中，患者在临床表现、疼痛症状和实验室血沉测定、CRP测定和腕关节放射性核素99Tcm-MDP骨显像ROI测定均有不同程度的改善。

The paper presents a new filling-sample method by which the sample quantity filled in a box depends on the energies of γ-rays to be measured. The detection efficiencies of HPGe detector were calculated by using Monte-Carlo method for various γ-ray energies and at various soil sample quantities in a box, and the optimal filling-sample quantities for different-energy γ-rays from radioactive nuclides of 238U, 232Th, 226Ra, 40K, are respectively obtained.

本文提出了样品装量与待测γ射线能量有关联的装样方法，并用蒙特卡罗方法模拟计算了不同能量γ射线的探测效率与样品装量之间的关系，得到用HPGe γ谱仪分析238U、232Th、226Ra和40K等放射性核素活度各自的最佳装样量。

The high temperature and strong radioactivity target-source system is one of the critical techniques in ISOL.

因为涉及到强放射性及放射性核素的释放问题，靶材料及靶-源结构材料的确定是一个重要的问题。

Methods Neonate rats were irradiated with a single injection of 2 μl enriched*" 235 uranium( 235 U)into the lateral ventricle of the rat brain on the first day of life(less than 24 hours after birth)at doses of 0,1,5 and 10 μg of*" 235 U,respectively.

新生大鼠侧脑室注射 2 μl浓缩铀溶液后，多方位地观察不同浓度的2 35U对早期生长发育的影响，放射自显影示踪术观察脑内放射性核素行径定位。

The isotope of 266Bh was produced and identified definitely in bombardments of 243Am target with 162 MeV 26Mg ions at HIRFL.

报道了利用兰州重离子研究装置提供的26Mg重离子束流轰击243Am靶产生和鉴别已知超重核素266Bh的实验结果。

Combined with the former studies and dating, it is believed that the area around the Tanggula Pass has experienced four major Pleistocene Glaciations, corresponding to marine isotope stage 2, 3, 4 and 6, respectively, and two Holocene glacial advances （the Neoglaciation and the Little Ice Age）.

在野外综合考察的基础上，对唐古拉山垭口地区末次冰期的冰碛漂砾进行了宇生核素^10Be暴露年龄的测定，得到（16.1 1.7）kaBP、（31.9 3.4）kaBP、（41.4 4.3）kaBP和（66.8 4.3）kaBP4个测年数据。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷