Lead dioxide electrodes on Ti substrates were prepared by thermal-deposition or electro-deposition. The amount of hydroxyl radicals generated at the electrodes prepared by the above-mentioned two methods was compared ...Lead dioxide electrodes on Ti substrates were prepared by thermal-deposition or electro-deposition. The amount of hydroxyl radicals generated at the electrodes prepared by the above-mentioned two methods was compared with that at the electrodes mingled with Bi or La prepared by electro-deposition. The experimental results indicate that the highest concentration of hydroxyl radicals generated by thermal-deposition, electro-deposition mingled with nothing, electro-deposition mingled with Bi or La was 0.781, 1.048, 1.838 or 2.044 μmol/L, respectively. When phenol was electrolyzed on the four electrodes at a current density of 30 mA/cm2, the removal efficiency of phenol after electrolysis for 1.5 h was 87.30%, 93.55%, 97.95% or 98.70%, TOC removal efficiency after electrolysis for 5 h was 86.76%, 94.26%, 98.53% or 99.60%, respectively. Through the degradation experiments of phenol, the amount of hydroxyl radicals was responsible for the removal efficiency of phenol. The electro-catalytic characteristics were investigated by SEM, the generation amount of hydroxyl radicals, the degradation degree of phenol and the stability and conductivity of the electrodes were also investigated. The experimental results indicate that the four electrodes all show good electro-catalytic characteristics; the electro-catalytic characteristics of the electrode mingled with La were superior to those of the other three ones, and the electrochemical degradation of phenol followed one-step reaction dynamics.展开更多
美容手术以女性为主,女性也是术后恶心呕吐(postoperative nausea and vomiting,PONV)的高发人群;美容手术常用局部麻醉,但局麻阻滞不完善会加重患者的紧张焦虑,造成循环系统的剧烈波动,增加组织损伤和出血,影响术后康复及手术效果。因...美容手术以女性为主,女性也是术后恶心呕吐(postoperative nausea and vomiting,PONV)的高发人群;美容手术常用局部麻醉,但局麻阻滞不完善会加重患者的紧张焦虑,造成循环系统的剧烈波动,增加组织损伤和出血,影响术后康复及手术效果。因此需使用镇静镇痛药物辅助来达到抗焦虑、镇静、镇痛和防治PONV的作用。氟哌利多具有镇静、强效镇吐作用,小剂量氟哌利多(0.625 mg-1.25mg)预防PONV尤其是吗啡镇痛导致的PONV效果良好。但用药后发现个别患者出现不能解释的"极度紧张焦虑",致使手术暂停或终止。认真分析研究后确定是氟哌利多导致的静坐不能,经使用苯二氮卓类治疗后症状消失。展开更多
基金the Environment Bureau of Jilin Province, China(No.2006-11)Scientific Institute of Changchun City(No. 2007KZ15)985 Project of Jilin University
文摘Lead dioxide electrodes on Ti substrates were prepared by thermal-deposition or electro-deposition. The amount of hydroxyl radicals generated at the electrodes prepared by the above-mentioned two methods was compared with that at the electrodes mingled with Bi or La prepared by electro-deposition. The experimental results indicate that the highest concentration of hydroxyl radicals generated by thermal-deposition, electro-deposition mingled with nothing, electro-deposition mingled with Bi or La was 0.781, 1.048, 1.838 or 2.044 μmol/L, respectively. When phenol was electrolyzed on the four electrodes at a current density of 30 mA/cm2, the removal efficiency of phenol after electrolysis for 1.5 h was 87.30%, 93.55%, 97.95% or 98.70%, TOC removal efficiency after electrolysis for 5 h was 86.76%, 94.26%, 98.53% or 99.60%, respectively. Through the degradation experiments of phenol, the amount of hydroxyl radicals was responsible for the removal efficiency of phenol. The electro-catalytic characteristics were investigated by SEM, the generation amount of hydroxyl radicals, the degradation degree of phenol and the stability and conductivity of the electrodes were also investigated. The experimental results indicate that the four electrodes all show good electro-catalytic characteristics; the electro-catalytic characteristics of the electrode mingled with La were superior to those of the other three ones, and the electrochemical degradation of phenol followed one-step reaction dynamics.
文摘美容手术以女性为主,女性也是术后恶心呕吐(postoperative nausea and vomiting,PONV)的高发人群;美容手术常用局部麻醉,但局麻阻滞不完善会加重患者的紧张焦虑,造成循环系统的剧烈波动,增加组织损伤和出血,影响术后康复及手术效果。因此需使用镇静镇痛药物辅助来达到抗焦虑、镇静、镇痛和防治PONV的作用。氟哌利多具有镇静、强效镇吐作用,小剂量氟哌利多(0.625 mg-1.25mg)预防PONV尤其是吗啡镇痛导致的PONV效果良好。但用药后发现个别患者出现不能解释的"极度紧张焦虑",致使手术暂停或终止。认真分析研究后确定是氟哌利多导致的静坐不能,经使用苯二氮卓类治疗后症状消失。
