2 ng/L (water) and 6.6 ng/g (sediment), respectively. Due to the continuous input of estrogens to Dianchi Lake from STPs and inflow rivers, present estrogen levels in various tissues of wild fish species sampled from the lake (2013) were higher than the values detected in the previous years (2009 and 2010). The bioaccumulation of steroid estrogens in wild fish species from different sampling sites was in the order of STP-5 > Dianchi Lake (2013) > Dianchi Lake (2010) Dianchi Lake (2009) field control > laboratory control, which is mainly affected by exposure ‘concentrations. By employing risk quotient
(RQ), it is found that eco-toxicological risk of steroid estrogens in Dianchi Lake catchment was in Quisinostat a sequence of 22 rivers > effluents of eight STPs > Dianchi Lake (2013) > Dianchi Lake (2010), and high RQs were check details found in EE2, which should be controlled preferentially in this catchment. (C) 2013 Elsevier Ltd. All rights reserved.”
“We have investigated the electronic structures and magnetic properties of La2MnNiO6 that is a typical ferromagnetic insulator with the double perovskite structure. We have examined the valence states of Mn and Ni ions using the full-potential linearized augmented plane wave band method. The density of states as well as the
charge density plot are in good agreement with the reported experimental and theoretical results. Cytoskeletal Signaling inhibitor We have examined the ferromagnetic mechanism in terms of the superexchange interaction. We have calculated the x-ray absorption spectrum based on the band structure results and compared it with the experiment. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3073661]“
“Benzotriazole (BTR) and benzothiazole (BTH) derivatives are high-production-volume chemicals that are mainly used
as corrosion inhibitors, and are widely distributed in the environment. BTR derivatives are found in plastics, dishwasher detergents, dry cleaning equipment, and de-icing/anti-icing fluids. BTH derivatives are found in rubber materials, herbicides, slimicides, algicides, fungicides, photosensitizers, azo dyes, drugs, de-icing/anti-icing fluids, and food flavors. However, exposure of humans to BTRs and BTHs is still not known. In this study, six BTRs (1H-benzotriazole, 1-hydroxy-benzotriazole, 4- and 5-hydroxybenzotriazole [mixture of two isomers], tolyltriazole, xylyltriazole [or 5,6-dimethyl-1H-benzotriazolej, and 5-chloro-benzotriazole) and six BTHs (benzothiazole, 2-morpholin-4-yl-benzothiazole, 2-hydroxy-benzothiazole, 2-methylthio-benzothiazole, 2-amino-benzothiazole, and 2-thiocyanomethylthio-benzothiazole) were determined in human urine collected from general populations in seven countries (the U.S., Greece, Vietnam, Korea, Japan, China, and India). The median urinary concentration of the sum of five BTRs (2,Sigma(5)BTRs; 4- and 5-hydroxy-benzotriazole were not included) ranged from 02 (Korea) to 2.