为探讨饥饿法和氧化锌法强制换羽对种鸽产蛋性能、血清免疫球蛋白含量和换羽基因表达量的影响,将健康、体重相近的96对12月龄美国白羽王鸽随机分为3组,其中对照组饲喂常规饲料;试验A组限饲8~14 d;试验B组饲喂高锌日粮,7 d后饲喂常规饲...为探讨饥饿法和氧化锌法强制换羽对种鸽产蛋性能、血清免疫球蛋白含量和换羽基因表达量的影响,将健康、体重相近的96对12月龄美国白羽王鸽随机分为3组,其中对照组饲喂常规饲料;试验A组限饲8~14 d;试验B组饲喂高锌日粮,7 d后饲喂常规饲料。结果显示,与对照组相比,换羽后产蛋期试验A、B组产蛋量分别提高19.78%（P〈0.05）和13.85%（P〉0.05）,平均蛋重和日均采食量差异均不显著（P〉0.05）,畸形率和料蛋比均显著减少（P〈0.05）。换羽后产蛋期试验A、B组IgA、IgM和IgG含量均增加。换羽中期试验A、B组骨形态发生蛋白4（BMP4）和成纤维细胞生长因子5（FGF5）m RNA表达量均显著增加（P〈0.05）。换羽后期试验A、B组BMP4和FGF5 m RNA表达量均显著增加（P〈0.05）。换羽后产蛋期试验A、B组BMP4、FGF5 m RNA表达量均无显著变化（P〉0.05）。因此,两种强制换羽方法对蛋鸽第二周期的产蛋性能、血清免疫球蛋白含量具有一定的影响。展开更多
The neutral zinc sulfate solution obtained from hydrometallurgical process of Angouran zinc concentrate has cadmium, nickel and cobalt impurities, that must be purified before electrowinning. Therefore, cadmium and ni...The neutral zinc sulfate solution obtained from hydrometallurgical process of Angouran zinc concentrate has cadmium, nickel and cobalt impurities, that must be purified before electrowinning. Therefore, cadmium and nickel are usually cemented out by addition of zinc dust and remained nickel and cobalt cemented out at second stage with zinc powder and arsenic trioxide. In this research, a new approach is described for determination of effective parameters and optimization of zinc electrolyte hot purification process using statistical design of experiments. The Taguchi method based on orthogonal array design（OAD） has been used to arrange the experimental runs. The experimental conditions involved in the work are as follows： the temperature range of 70-90 ℃ for reaction temperature（T）, 30-90 min for reaction time（t）, 2-4 g/L for zinc powder mass concentration（M）, one to five series for zinc dust particle size distributions（S1-S5）, and 0.1-0.5 g/L（C） for arsenic trioxide mass concentration. Optimum conditions for hot purification obtained in this work are T4（85 ℃）, t4=75 min, M4=3.5 g/L, S4（Serie 4）, and C2=0.2 g/L.展开更多
Undoped and Na-doped ZnO films were deposited by sol-gel method.The effects of sodium incorporation on structure,surface morphology and optical constants of the films were investigated.X-ray diffraction patterns show ...Undoped and Na-doped ZnO films were deposited by sol-gel method.The effects of sodium incorporation on structure,surface morphology and optical constants of the films were investigated.X-ray diffraction patterns show the hexagonal wurtzite polycrystalline structure and that the sodium incorporation leads to the change in the structural characteristics of ZnO films.The SEM observations show that the surface morphology of the films is affected by the sodium incorporation.The transmission spectra show that the average transmittance of the films is above 85% in the visible range.The absorption edge initially blue-shifts and then red-shifts with the increase of Na doping content.The optical constants of these films were calculated using transmission spectra.Refractive indices of the films in the visible range decrease at first and then increase with increasing Na doping content.展开更多
文摘为探讨饥饿法和氧化锌法强制换羽对种鸽产蛋性能、血清免疫球蛋白含量和换羽基因表达量的影响,将健康、体重相近的96对12月龄美国白羽王鸽随机分为3组,其中对照组饲喂常规饲料;试验A组限饲8~14 d;试验B组饲喂高锌日粮,7 d后饲喂常规饲料。结果显示,与对照组相比,换羽后产蛋期试验A、B组产蛋量分别提高19.78%（P〈0.05）和13.85%（P〉0.05）,平均蛋重和日均采食量差异均不显著（P〉0.05）,畸形率和料蛋比均显著减少（P〈0.05）。换羽后产蛋期试验A、B组IgA、IgM和IgG含量均增加。换羽中期试验A、B组骨形态发生蛋白4（BMP4）和成纤维细胞生长因子5（FGF5）m RNA表达量均显著增加（P〈0.05）。换羽后期试验A、B组BMP4和FGF5 m RNA表达量均显著增加（P〈0.05）。换羽后产蛋期试验A、B组BMP4、FGF5 m RNA表达量均无显著变化（P〉0.05）。因此,两种强制换羽方法对蛋鸽第二周期的产蛋性能、血清免疫球蛋白含量具有一定的影响。
文摘The neutral zinc sulfate solution obtained from hydrometallurgical process of Angouran zinc concentrate has cadmium, nickel and cobalt impurities, that must be purified before electrowinning. Therefore, cadmium and nickel are usually cemented out by addition of zinc dust and remained nickel and cobalt cemented out at second stage with zinc powder and arsenic trioxide. In this research, a new approach is described for determination of effective parameters and optimization of zinc electrolyte hot purification process using statistical design of experiments. The Taguchi method based on orthogonal array design（OAD） has been used to arrange the experimental runs. The experimental conditions involved in the work are as follows： the temperature range of 70-90 ℃ for reaction temperature（T）, 30-90 min for reaction time（t）, 2-4 g/L for zinc powder mass concentration（M）, one to five series for zinc dust particle size distributions（S1-S5）, and 0.1-0.5 g/L（C） for arsenic trioxide mass concentration. Optimum conditions for hot purification obtained in this work are T4（85 ℃）, t4=75 min, M4=3.5 g/L, S4（Serie 4）, and C2=0.2 g/L.
基金Project(50872001) supported by the National Natural Science Foundation of ChinaProject(20060357003) supported by Research Fund for the Doctoral Program of Higher Education of ChinaProject(KJ2010A284) supported by the Natural Science Foundation of Anhui Higher Education Institution of China
文摘Undoped and Na-doped ZnO films were deposited by sol-gel method.The effects of sodium incorporation on structure,surface morphology and optical constants of the films were investigated.X-ray diffraction patterns show the hexagonal wurtzite polycrystalline structure and that the sodium incorporation leads to the change in the structural characteristics of ZnO films.The SEM observations show that the surface morphology of the films is affected by the sodium incorporation.The transmission spectra show that the average transmittance of the films is above 85% in the visible range.The absorption edge initially blue-shifts and then red-shifts with the increase of Na doping content.The optical constants of these films were calculated using transmission spectra.Refractive indices of the films in the visible range decrease at first and then increase with increasing Na doping content.
