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。
On Earth rarest element astatine. 地球上最稀有的元素砹。
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。
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。
The preparation of 211 At - astatine labelled protein and peptides ~(211)At标记蛋白质和多肽的制备