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抗生素作为一种杀灭或抑制细菌生长的药物,在食品、临床、兽药、农业等方面得到了广泛的应用。然而抗生素的大量应用导致其残留物进入地表水,进而污染自来水厂水源,而标准的水处理不能将其完全清除,从而对人体产生较大的危害,引起过敏、发热、耐药性甚至再生障碍性贫血等症状。因此,针对饮用水中抗生素残留检测的研究引起了人们广泛的关注。本文对近年来可应用于饮用水中抗生素残留分析方法(高效液相色谱、太赫兹时域光谱技术、免疫分析法、表面增强拉曼光谱法)的研究进展进行了综述,并对今后抗生素残留检测的发展方向作了展望。 相似文献
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Degradation of Acid Orange 7 by Gliding Arc Discharge Plasma in Combination with Advanced Fenton Catalysis 总被引:1,自引:0,他引:1
ChangMing Du LuLu Zhang Jing Wang ChuangRong Zhang HongXia Li Ya Xiong 《Plasma Chemistry and Plasma Processing》2010,30(6):855-871
A new plasma–catalysis process of gliding arc discharge (GAD) plasma with zero–valent iron (ZVI) was examined. Because GAD
plasma creates an acidic environment, solid iron releases ferrous ions which act as a catalyst for the decomposition of the
hydrogen peroxide. A comparative study of the catalytic effects between Fe2+ and Fe0 in GAD plasma was investigated. The decolorization reactions of Acid Orange 7 (AO7) followed pseudo–first–order kinetics.
And the rate constants for the process of GAD with ZVI was increased by 30% and by 19%, respectively, compared with the process
of GAD alone and the process of GAD with ferrous. The investigations of solution pH and hydrogen peroxide both demonstrated
that the GAD plasma induced conditions are much suitable for advanced Fenton reactions. The corrosion of ZVI in GAD plasma
can give continuous ferrous ions to sustain Fenton reaction. Also, ZVI was demonstrated to have favorable reusable feature. 相似文献
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Optical Review - Based on the Richards–Wolf vector diffraction theory, the strong focusing properties of a 4Pi focusing system under the illumination of the azimuthally polarized... 相似文献
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Based on the mechanism of H2O2-mediated hydrolysis of sulfonates, two fluorescein disulfonates compounds (FS-1 and FS-2) were designed and synthesized as
the highly selective and sensitive fluorescent probes for imaging H2O2 in living cells. The probes were detected with elemental analysis, IR, 1H NMR and 13C NMR. Upon reaction with H2O2, the probes exhibit strong fluorescence responses and high selectivity for H2O2 over other reactive oxygen species and some biological compounds. Furthermore, the sulfonate-based probes, as novel fluorescent
reagents, are cell-permeable and can detect micromolar changes in H2O2 concentrations in living cells by using confocal microscopy.
Supported by the National Basic Research Program of China (Grant No. 2007CB936000), the National Natural Science Funds for
Distinguished Young Scholar (Grant No. 20725518), Major Program of the National Natural Science Foundation of China (Grant
No. 90713019), the National Natural Science Foundation of China (Grant No. 20875057), the Natural Science Foundation of Shandong
Province, China (Grant No. Y2007B02), and the Science and Technology Development Programs of Shandong Province, China (Grant
No. 2008GG30003012) 相似文献
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基于过氧化氢(H2O2)特异性催化水解磺酸酯,设计合成了新型绿色荧光探针:荧光素二磺酸酯(FS—1)和二氯荧光素二磺酸酯(FS-2)两种螺环内酯型化合物,用于活细胞内过氧化氢的检测.探针结构由元素分析、IR、^1H NMR及^13C NMR表征.实验表明:探针FS-1和FS-2在模拟生物体系中检测过氧化氢具有良好的选择性和灵敏度,且线性范围较宽.细胞成像显示:探针FS-1和FS-2用于PMA刺激或外加不同浓度H2O2孵育的小鼠腹膜巨噬细胞均呈现明亮的绿色荧光,且能对细胞内H2O2微摩尔级浓度变化产生响应,证明两探针均具有良好的膜渗透性、高的选择性及良好的灵敏度.该方法的建立对研究生物体内H2O2的产生,H2O2导致的各种疾病机制及H2O2介导的信号转导途径具有重要的理论及实际意义. 相似文献
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