Synthesis and characterization of DNA-quantum dot conjugates for the fluorescence ratiometric detection of unlabelled DNA.

A quantum dot-based ratiometrically responsive fluorescent sensor for unlabeled single-stranded DNA (ssDNA) is reported. Several technical issues concerning the development of high yield ssDNA-QD conjugation chemistry were addressed. The DNA sensor was synthesized by conjugating methacrylic phosphoramidite-functional oligonucleotides to water-soluble cadmium zinc sulfide core/zinc sulfide shell quantum dots (CdZnS/ZnS QDs).

The destruction of dichloroethane over a gamma-alumina supported manganese oxide catalyst.

Halogenated VOCs emissions are associated to a wide range of industrial processes; for instance, dichloroethane (DCEA) is mainly used in metal degreasing processes and known to be hazardous to the environment and public health. The effects of operating parameters on the catalytic incineration of DCEA over the Mn(2)O(3)/gamma-Al(2)O(3) catalyst were performed in this study. The results show that conversion of DCEA increases as inlet temperature and oxygen concentration increase, and decreases with the increases of DCEA concentration and space velocity.