| 1 | Changes in heavy metal contents in animal feeds and manures in an intensive animal production region of China显示文摘The 360 feed and manure samples were collected from 150 animal farms in Jiangsu Province, China and analyzed for heavy metals. Concentrations of Zn and Cu in animal feeds were 15.9–2041.8 and undetected–392.1 mg/kg respectively, while Hg, As, Pb, Cd, and Cr in all feeds were below 10 mg/kg. Concentrations of Cu, Zn, and Cr in animal manures were 8.4–1726, 39.5–11379, and 1.0–1602 mg/kg respectively, while As, Cd, Hg, and Pb were < 10 mg/kg. The concentration of Cu, Zn, As and Cr in animal feed and manure were positively correlated(p < 0.001), but the Cd, Hg, and Pb were not statistically correlated between the feed and the manure. Concentrations of Cu and Zn were highest in pig feed and manure, followed by poultry and dairy feeds and manures. During 1990– 2008, Cu, Zn, As, Cr, Cd contents increased by 771%, 410%, 420%, 220%, and 63% in pig manure, 212%, 95%, 200%, 791%, and –63% in dairy manure, and 181%, 197%, 1500%, 261, and 196% in poultry manure. Most of the increases occurred from 2002 to 2008, which reflects the extensive use of feed additives after 2002. In contrast, Pb and Hg in manures continuously decreased from 1990 to 2008. The results suggest that the heavy metal contents in animal manure have been greatly increased over 18 years and the contribution of manures to soil should be considered. | Hui Wang Yuanhua Dong Yunya Yang Gurpal S.Toor Xumei Zhang | 2013 | Journal of Environmental Sciences2013，25，12： | 54 |
| 2 | A thermodynamic potential for barium zirconate titanate solid solutions显示文摘Barium zirconate titanate[Ba(ZrxTi_(1−x))O_(3)]solid solutions are promising lead-free ferroelectric materials that have received substantial interest.Thermodynamic analysis based on phenomenological Landau–Devonshire theory is a powerful method for theoretical investigation of ferroelectric materials,but cannot be applied to Ba(ZrxTi1−x)O3 because there is no thermodynamic potential.In this paper,a thermodynamic potential for Ba(ZrxTi_(1−x))O_(3)(0≤x≤0.3)solid solutions is constructed,and then a thermodynamic analysis carried out.The results accurately reproduce known phase structures and their transition temperatures,with good agreement with experimentally measured polarization,dielectric,and piezoelectric constants.It is found that Ba(ZrxTi_(1−x))O_(3) solid solutions at room temperature have three phase boundaries,including a tetragonal–orthorhombic phase boundary at x=0.013,an orthorhombic–rhombohedral phase boundary at x=0.0798,and a rhombohedral–paraelectric phase boundary at x=0.2135.The results also indicate that the chemical composition-induced ferroelectric–paraelectric phase boundary has superior electromechanical properties,suggesting a new way to enhance electromechanical coupling in Ba(ZrxTi_(1−x))O_(3) solid solutions. | Jinlin Peng Dongliang Shan Yunya Liu Kai Pan Chihou Lei Ningbo He Zhenyu Zhang Qiong Yang | 2018 | npj Computational Materials2018，，1： | 3 |
| 4 | Construction of an Infectious Clone for Mosquito-Derived Tembusu Virus Prototypical Strain显示文摘Dear Editor,Duck Tembusu virus(DTMUV),a member of the Flavivirus genus within the Flaviviridae family,has caused huge economic losses to the poultry industry in China and even in Asia since 2010(Zhang et al.2017).The first strain of Tembusu virus(TMUV)MM_1775 was isolated from mosquitoes in 1955 in Malaysia(Platt et al.1975).DTMUV CQW1 strain(GenBank:KM233707.1)was isolated from the liver tissue of Cherry Valley ducks in southwest China in 2015(Zhu et al.2015).The positive control rCQW1 was rescued from an infectious clone that contained the full-length cDNA of CQW1.And the complete cDNA was positioned under the control of the T7 promoter elements for in vitro transcription(Chen et al.2018).The relationship between TMUV evolution and pathogenic variants has not been revealed.The fundamental reason is the lack of the in vitro operation platform for the prototypical strain genome. | Xiaoli Wang Yu He Jiaqi Guo Bowen Jiang Mingshu Wang Renyong Jia Dekang Zhu Mafeng Liu Xinxin Zhao Qiao Yang Ying Wu Shaqiu Zhang Yunya Liu Ling Zhang Yanling Yu Anchun Cheng Shun Chen | 2021 | Virologica Sinica2021，36，6： | 1 |
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