Crystal structure of (5R,10R)-2,7-dibromo-3,8-dihydroxy-5,10-dimethoxy-5,10-dihydrochromeno[5,4,3-cde]chromene sesquihydrate, C16H12Br2O6 center dot 1.5H(2)O

C16H15Br2O7.5, orthorhombic, P2(1)2(1)2 (no. 18), a = 18.483(2) angstrom, b = 9.413(1) angstrom, c = 10.072(1) angstrom, V = 1752.3 angstrom(3), Z = 4, R-gt(F) = 0.083, wR(ref)(F-2) = 0.202, T= 293 K.

EDMOCSS-有毒有机化学品在土壤－植物系统中暴露动态的新模型研究－－菲（Phenanthrene)在沈阳西部城市污水慢速渗滤土地处理系统的暴露动态模拟

有毒有机污染物（TOP）在土壤－植物系统暴露动态模型是TOP生态风险评价和管理的必要手段，是目前TOP环境科学研究的活跃领域。以往主要以经典的对流－扩散方程（CDE）为基础的建模途径存在诸多局限：i.基本过程机制和理论研究尚不完善，制约着系统模型的研究水平；ii.模型过于复杂，在应用上存在很大困难，；iii.普遍缺乏野外实际观测结果的检验。需要开辟和发展新的TOP在土壤－植物系统暴露动态模型正是在此方面的突破。EDMOCSS很大程度上克服了经典建模途径的局限，既包括几乎所有基本过程及其目前普遍接受和应用的理论，模型的结构又不很复杂，具有良好行为特征，应用上较方便。以优先有机污染物－菲（phenanthrene)为供试化学品的野外慢速土地处理系统（SR－LTS）小区动态观察结果，很好地验证了EDMOCSS核心模型－耕作层土壤分室模型的结果，表明了EDMOCSS有较好模拟预测能力，为EDMOCSS的深入研究和应用奠定了基础。

A facile synthesis of CdSe and CdTe nanorods assisted by myristic acid

A simple, productive, low-cost route has been developed to synthesize the high-quality 1-D nanorods of CdE (E = Se, Te) with 3-8 nm in diameter and 5-40 nm in length using myristic acid as a complexing agent. Moreover, the reaction is performed under mild conditions and relatively low temperatures. The Xray powder diffraction patterns confirmed the CdE nanorods with wurtzite structure.

Synthesis of barium fluoride nanoparticles from microemulsion

The cetyltrimethylammonium bromide (CTAB)/2-octanol/water microemulsion system was used to synthesize barium fluoride nanoparticles. X-ray powder diffraction (XRD) analysis showed that the products were single phase. The results of scanning electron microscopy and calculations using the Scherrer equation from the line widths of the XRD have been used to estimate the average particle sizes of the powder products. The results showed that the nanoparticle size was affected by water content and surfactant (CTAB) concentration. As water content decreases from 14.2 to 9.47% (w/w), the particle size decreases from 75 to 40 rim. In addition, increasing the reaction times from 5 to 120 min increases the particle size from 75 to 150 rim, and increasing the amount of surfactant decreases the size of the particle. Luminescence spectra of the BaF2:Ce nanoparticles are also discussed.