Seasonal variations, source apportionment and dry deposition of chemical species of total suspended particulate in Pengjia Yu Island, East China Sea.

Total of 172 total suspended particulate (TSP) samples and its chemical compositions were collected and analyzed from January to December 2010 in Pengjia Yu Island, an open region in East China Sea (ECS). Despite the predominance of sea-salt major ions (Na+, Cl-), the presence of non-sea-salt SO42- (nss-SO42-) and NO3- as well as combustion-derived trace metals clearly establishes the impact of anthropogenic sources over ECS. The annual contributions of coal, heavy-fuel oil and traffic to the measured chemical species were 21.0 %, 15.0 % and 15.5 %, respectively. Especially in spring, the contributions of crustal minerals to measured chemical species during dust period (33.6 %) were higher than that (13.2 %) during non-dust period. The calculated annual average dry deposition fluxes for trace metals and total inorganic nitrogen were 246.1 ± 345.8 µg/m2/d and 2950.4 ± 2245.0 µg/m2/d, suggesting that atmospheric deposition is an important source of nutrient elements for the south of ECS.

New polymer micelles and its application in cancer therapy / 中国药学杂志

The current prevalence of cancer chemotherapy drugs is inefficient and highly toxic, thus selecting the appropriate new forms of cancer treatment has become one of the important tasks. On the basis of domestic and foreign research literature, cutline the composition, characteristics and main preparation methods of polymeric micelles. Introduced varieties of stimuli-responsive polymer micelles, as well as targeted polymeric micelles used as an anticancer drug carrier. By making use of inside microenvironment of tumor cells, the preparation of various of new intelligent polymeric micelles with slight side effects and good treatment in virto and in vivo, can achieve effective control of drug release, which has great development and prospect in application.