1.To study the principles of portable sensors and sensitive quantitative detection of DNA
2.To study the detection capability of the capture DNA and capture DNA on Streptavidin-MNBs
3.To study the effect of temperature, incubation time for mixture and MBs, amount of DNA–invertase conjugation,and the dosage of DNA polymerase on optimization of DNA detection method.
4.To study the sensing performance for target DNA