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The nitrogen and fluorine co-doped TiO_2 polycrystalline powder was synthesized by calcinations of the hydrolysis product of tetrabutyl titanate with ammonium fluoride. Nitrogen and fluorine co-doping causes the absorption edge of TiO_2 to shift to a lower energy region. The photocatalytic activity of co-doped TiO_2 with anatase phases was found to be 2.4 times higher than that of the commercial TiO_2 photocatalyst Degussa P25 for phenol decomposition under visible light irradiation. The co-doped TiO_2 powders only contain anatase phases even at 1000°C. Apparently, ammonium fluoride added retarded phase transformation of the TiO_2 powders from anatase to rutile. The substitutional fluorine and interstitial nitrogen atoms in co-doped TiO_2 polycrystalline powder were responsible for the vis light response and caused the absorption edge of TiO_2 to shift to a lower energy region. [ABSTRACT FROM AUTHOR]

Different nutrient media experimentally were N, P and Fe-limited conditions and a serial of diluted BG11 media. The cell change of morphology and life history, cell number, cell color and cell area of Microcystis were analyzed quantitatively. First, the effects of nitrogen, phosphorus and iron depletion were distinctively different. Phosphorus and iron depletion caused more special division cells, slowly growth increasing, the easier change of bigger cell area. Second, the nitrogen and iron depletion could make the color of alga from green to brown. Finally, according to the resource competition and Monod equation, Microcystis kinetics of phosphorus and iron were also examined. K_s and μ_{max} of phosphorus absorption were 0.0352 μmol/L, 0.493 d^{-1} respectively; iron absorption: 0.00323 μmol/L, 0.483 d^{-1}. In a word, some evidences of the Microcystis bloom privilege in certain nutrient conditions were indicated in the experiments. The privileges were determined as the reviving under the adverse circumstances through the special division, the various nitrogen resources, and the lower kinetics of phosphorus and iron than that of most of other algae. The conclusions provided the scientific basis for preventing and managing Microcystis bloom in freshwater. [ABSTRACT FROM AUTHOR]

To investigate the association of LIG1 with the risk of lung cancer, all subjects of unrelated ethnic Han Chinese in Liaoning Province were involved in a hospital-based case-control study. The case group consisted of 370 histologically diagnosed lung cancer patients; 314 controls were selected from cancer-free patients during Dec. 2009 to Dec. 2011. LIG1 rs1050298SNP were analyzed by TaqMan real-time PCR method. All statistical analyses were performed with Statistical Product and Service Solution sv13.0 (SPSS). The genotype distribution frequency of LIG1 rs1050298 SNP displayed significant difference between the case and the control group. Individuals carrying the LIG1 rs1050298 T genotype had higher risks of lung cancer, especially those with squamous cell carcinoma.