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The occurrence of sulfonamide and tetracycline resistance and their pollution profile in the aquaculture environment of Tianjin, northern China, were investigated. The presence of antibiotic-resistant bacteria was identified and the corresponding antibiotic resistance genes (ARGs) were quantified at 6 aquaculture farms in Tianjin. Sulfonamide-resistance(More)
The concentrations of toxic metals As, Co, Cr, Cu, Mn, Ni, Pb, V and Zn in street dust of Tongchuan, China were determined by wavelength dispersive X-ray fluorescence spectrometry. The risk of the analyzed metals to urban ecosystem and human health were evaluated by potential ecological risk index and human exposure model, respectively. The results show(More)
In service-oriented software development, configuring and composing software services for users according to their personalized requirements become increasingly important. In our previous work, we have proposed a meta-model framework to describe personalized requirements involving domain-related services, based on which we can create domain models to be(More)
Three-dimensional (3D) molecular imaging enables the study of biological processes in both living and nonviable systems at the molecular level and has a high potential on early diagnosis. In conjunction with specific molecular probes, optical coherent tomography (OCT) is a promising imaging modality to provide 3D molecular features at the tissue level. In(More)
Service recommendation becomes an increasingly important issue when more and more Web services are published on the Internet. Existing Web service recommendation approaches based on collaborative filtering (CF) seldom consider recommending services based on users’ ratings on services since such kind of explicit feedback is difficult to collect. In addition,(More)
Ozone (O3) would be harmful to human skin for its strong oxidizing property, especially when stratum corneum or corneal epithelium is wounded. Imaging the penetration and distribution of ozone at depth is beneficial for studying the influence of ozone on skin or eyes. Here, we introduced a facile method for three-dimensional (3D) imaging of the penetration(More)
The first example of the synthesis of m-alkylphenols via a ruthenium-catalyzed CAr-H bond functionalization of phenol derivatives with sec/tert-alkyl bromides is reported. Mechanistic studies indicated that the m-CAr-H bond alkylation may involve a radical process and that a six-membered ruthenacycle complex was the active catalyst. Moreover, this approach(More)
Thermodynamic analysis and molecular dynamics simulations were conducted to systematically study the size-dependent electrochemical response of solids. By combining the generalized Young-Laplace equation with the popular Butler-Volmer formulation, the direct influence of surface stress on solid film electrochemical reactions was isolated. A series of(More)