目的对葡萄酒中氨基甲酸乙酯进行污染评估,分析其摄入患肺癌的风险。方法采用个体食品研究方法了解葡萄酒中氨基甲酸乙酯的污染水平,结合2002年全国营养调查数据,剂量反应模型BMDL和暴露边界比(Margin of Exposure,MOE)进行评估。结果...目的对葡萄酒中氨基甲酸乙酯进行污染评估,分析其摄入患肺癌的风险。方法采用个体食品研究方法了解葡萄酒中氨基甲酸乙酯的污染水平,结合2002年全国营养调查数据,剂量反应模型BMDL和暴露边界比(Margin of Exposure,MOE)进行评估。结果葡萄酒中氨基甲酸乙酯平均暴露量每天1.6ng/kgBW患肺癌的MOE为188000;氨基甲酸乙酯较高的暴露量(97.5百分位)每天12.9ng/kgBW,患肺癌的MOE为23000。结论对我国葡萄酒中氨基甲酸乙酯的暴露应给予关注。展开更多
UV-curable hyperbranched polyurethane acrylate-polyurethane diacrylate/SiO2 dispersion （HBPUA-PUDA/SiO2） was prepared with isophorone diisocyanate （IPDI）, hyperbranched polyester Boltorn H20 （H20）, hydroxy-ethyl...UV-curable hyperbranched polyurethane acrylate-polyurethane diacrylate/SiO2 dispersion （HBPUA-PUDA/SiO2） was prepared with isophorone diisocyanate （IPDI）, hyperbranched polyester Boltorn H20 （H20）, hydroxy-ethyl acrylate （HEA）, polyethyleneglycol （PEG-200）and nano-SiO2. The UV curing kinetics of the films was investigated by FTIR. The results show that the curing speed of the films increases with the adding of nano-SiO2 and decreases with the adding of PUDA due to the slower chain movement. The thermal stability of the HBPUA-PUDA/SiO2 films was studied by using thermogravimetric analysis coupled with Fourier transform infrared spectroscopy （TGA/FTIR）. The results show that all films exhibit two degradation stages located at about 320 and 440℃ corresponding to the degradation for hard segments of urethane-acrylate and the degradation for soft segment and polyester core. In addition, the results from the analysis of TGA/FTIR also indicate that the decomposition temperature of HBPUA-PUDA/SiO2 film is 15℃ higher than that obtained for pure polymer. The degradation mechanism was proposed according to TGA/FTIR results.展开更多
文摘目的对葡萄酒中氨基甲酸乙酯进行污染评估,分析其摄入患肺癌的风险。方法采用个体食品研究方法了解葡萄酒中氨基甲酸乙酯的污染水平,结合2002年全国营养调查数据,剂量反应模型BMDL和暴露边界比(Margin of Exposure,MOE)进行评估。结果葡萄酒中氨基甲酸乙酯平均暴露量每天1.6ng/kgBW患肺癌的MOE为188000;氨基甲酸乙酯较高的暴露量(97.5百分位)每天12.9ng/kgBW,患肺癌的MOE为23000。结论对我国葡萄酒中氨基甲酸乙酯的暴露应给予关注。
文摘UV-curable hyperbranched polyurethane acrylate-polyurethane diacrylate/SiO2 dispersion （HBPUA-PUDA/SiO2） was prepared with isophorone diisocyanate （IPDI）, hyperbranched polyester Boltorn H20 （H20）, hydroxy-ethyl acrylate （HEA）, polyethyleneglycol （PEG-200）and nano-SiO2. The UV curing kinetics of the films was investigated by FTIR. The results show that the curing speed of the films increases with the adding of nano-SiO2 and decreases with the adding of PUDA due to the slower chain movement. The thermal stability of the HBPUA-PUDA/SiO2 films was studied by using thermogravimetric analysis coupled with Fourier transform infrared spectroscopy （TGA/FTIR）. The results show that all films exhibit two degradation stages located at about 320 and 440℃ corresponding to the degradation for hard segments of urethane-acrylate and the degradation for soft segment and polyester core. In addition, the results from the analysis of TGA/FTIR also indicate that the decomposition temperature of HBPUA-PUDA/SiO2 film is 15℃ higher than that obtained for pure polymer. The degradation mechanism was proposed according to TGA/FTIR results.
