The balance rate compared radon and its daughter nuclide with their mothernuclide is increased along with the remain-time extending, and reaches balance fully up to about 20 days.
随着密封时间的增加,氡及其子体与其母体核素之间相对平衡率增加,20d后达到放射性平衡。
Modification of the side chain radical of β-lactam class antibiotic is a possible effective way, while the mothernuclide maintain the activity, but the different side chain radical alternating the drug tolerance of bacterium.