astatine

noun

1. 砹（放射性化学元素）
   a chemical element. Astatine is a radioactive element which is found in small amounts in nature, and is produced artificially for use in medicine.

1. On Earth rarest element astatine.
   地球上最稀有的元素砹。
2. Any of the chemical elements fluorine or chlorine or bromine or iodine or astatine.
   氟、氯、溴、碘、砹中任意一种化学元素。
3. Synthesis and Characterization of SPC as a Linker for Labeling Proteins With Astatine and Iodine Radioisotopes
   用于放射性砹（碘）标记蛋白质的偶联剂SPC的合成及表征
4. The punch heated at 780 ℃ for min will gain non-homogeneous astatine in chemical component.
   冲头在780℃加热保温4min得到化学成分不均匀的奥氏体，淬火后可以获得大量的、细小的混合马氏体和细小的未溶碳化物。
5. Biological effect of astatine-211 and its pharmacology
   ~（211）At的生物学效应及其药理
6. The production of astatine-211 and its quality control
   ~（211）At的制备及其质量控制
7. The preparation of 211 At-astatine labelled protein and peptides
   ~（211）At标记蛋白质和多肽的制备
8. The retention of~ ( 211) At in blood of mice was much greater in the~ ( 211) At-IgG treated mice than in the Na~ ( 211) At treated mice, implying that the bond between the IgG and astatine was stable in vivo.
   ~（211）At在小鼠血液中的保留，在~（211）At-IgG处理的小鼠中比在Na~（211）At处理的小鼠中高得多，IgG-At键在体内应是稳定的。

noun

1. a highly unstable radioactive element (the heaviest of the halogen series)

   Synonym:    Atatomic number 85