Basic properties of a silica-based octyl(phenyl)-N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) extraction resin (CMPO/SiO2-P) was investigated.Adsorption behavior for some rare earth elements (RE) which are con...Basic properties of a silica-based octyl(phenyl)-N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) extraction resin (CMPO/SiO2-P) was investigated.Adsorption behavior for some rare earth elements (RE) which are constituents of high level liquid waste (HLLW) and the long-term stability of the extraction resin in nitric acid solution were examined.The CMPO extraction resin was significantly stable in 3 mol·L?1 HNO3 solution at 50oC.Furthermore,the RE(III) were efficiently separated from non-adsorptive fission product (FP) elements such as Sr(II) in a column experiment using a highly nitric acid solution.The separation behaviors of the elements are considered to result from the difference in their adsorption and elution selectivity based on the complex formation with CMPO.There was no strong dependency of RE(III) separation efficiency on feed solution flow rate.Only from the perspectives of the acid-resistant behavior of CMPO extraction resin and the elution kinetics for the metal ions with the extraction resin,the CMPO extraction resin can be used in the modified MAREC process for HLLW partitioning.展开更多
High level disinfection(HLD) of the gastrointestinal(GI)endoscope is not simply a slogan, but rather is a form of experimental monitoring-based medicine. By definition,GI endoscopy is a semicritical medical device. He...High level disinfection(HLD) of the gastrointestinal(GI)endoscope is not simply a slogan, but rather is a form of experimental monitoring-based medicine. By definition,GI endoscopy is a semicritical medical device. Hence,such medical devices require major quality assurance for disinfection. And because many of these items are temperature sensitive, low-temperature chemical methods, such as liquid chemical germicide, must be used rather than steam sterilization. In summarizing guidelines for infection prevention and control for GI endoscopy, there are three important steps that must be highlighted: manual washing, HLD with automated endoscope reprocessor, and drying. Strict adherence to current guidelines is required because compared to any other medical device, the GI endoscope is associated with more outbreaks linked to inadequate cleaning or disinfecting during HLD. Both experimental evaluation on the surveillance bacterial cultures and in-use clinical results have shown that, the monitoring of the stringent processes to prevent and control infection is an essential component of the broader strategy to ensure the delivery of safe endoscopy services, because endoscope reprocessing is a multistep procedure involving numerous factors that can interfere with its efficacy. Based on our years of experience in the surveillance of culture monitoring of endoscopic reprocessing, we aim in this study to carefully describe what details require attention in the GI endoscopy disinfection and to share our experience so that patients can be provided with high quality and safe medical practices. Quality management encompasses all aspects of pre- and postprocedural care including the efficiency of the endoscopy unit and reprocessing area, as well as the endoscopic procedure itself.展开更多
目的建立不同剂量双酚S(Bisphenol S,BPS)暴露动物实验模型,分析大鼠尿液中BPS内暴露水平的动态变化。方法通过灌胃给药建立对照组、1μg/kg低剂量组、100μg/kg中剂量组和10 mg/kg高剂量组Sprague Dawley(SD)大鼠暴露模型,使用超高效...目的建立不同剂量双酚S(Bisphenol S,BPS)暴露动物实验模型,分析大鼠尿液中BPS内暴露水平的动态变化。方法通过灌胃给药建立对照组、1μg/kg低剂量组、100μg/kg中剂量组和10 mg/kg高剂量组Sprague Dawley(SD)大鼠暴露模型,使用超高效液相色谱-串联质谱法(Ultra High Performance Liquid Chromatography Tandem Mass Spectrometry,UPLC-MS/MS)内标法检测大鼠在连续6周暴露不同剂量BPS后其尿样中BPS含量的变化。结果目标物BPS在0.2~100μg/L的范围内呈良好线性关系,r^(2)≥0.998,方法检出限为0.01μg/L,定量限为0.03μg/L。对大鼠尿液的检测结果表明,随着暴露时间的增加,BPS在各剂量组大鼠体内的生物累积效应明显,尿液中BPS的内暴露水平在给药的6周中持续升高,且从给药后的第一周开始,尿液BPS含量的组间差异均有统计学意义(P<0.05)。结论本研究成功建立了不同剂量BPS暴露的SD大鼠动物实验模型,准确测定了大鼠连续6周尿液中双酚S的内暴露水平,为BPS毒理学剂量-效应关系研究提供参考。展开更多
The research and developments of a new type of inorganic ion exchanger, crystalline silicotitanate (CST) are reviewed. This material is stable against radiation, and the CST has high selectivity for Cs over Na, K and ...The research and developments of a new type of inorganic ion exchanger, crystalline silicotitanate (CST) are reviewed. This material is stable against radiation, and the CST has high selectivity for Cs over Na, K and Rb. It performs well in acidic, neutral, and basic solutions. The results of ion exchange tests show that CST is an excellent candidate for Cs removal from high-level liquid waste.展开更多
文摘Basic properties of a silica-based octyl(phenyl)-N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) extraction resin (CMPO/SiO2-P) was investigated.Adsorption behavior for some rare earth elements (RE) which are constituents of high level liquid waste (HLLW) and the long-term stability of the extraction resin in nitric acid solution were examined.The CMPO extraction resin was significantly stable in 3 mol·L?1 HNO3 solution at 50oC.Furthermore,the RE(III) were efficiently separated from non-adsorptive fission product (FP) elements such as Sr(II) in a column experiment using a highly nitric acid solution.The separation behaviors of the elements are considered to result from the difference in their adsorption and elution selectivity based on the complex formation with CMPO.There was no strong dependency of RE(III) separation efficiency on feed solution flow rate.Only from the perspectives of the acid-resistant behavior of CMPO extraction resin and the elution kinetics for the metal ions with the extraction resin,the CMPO extraction resin can be used in the modified MAREC process for HLLW partitioning.
基金The gastrointestinal endoscopy unit of Kaohsiung Chang Gung Memorial Hospital,Taiwan
文摘High level disinfection(HLD) of the gastrointestinal(GI)endoscope is not simply a slogan, but rather is a form of experimental monitoring-based medicine. By definition,GI endoscopy is a semicritical medical device. Hence,such medical devices require major quality assurance for disinfection. And because many of these items are temperature sensitive, low-temperature chemical methods, such as liquid chemical germicide, must be used rather than steam sterilization. In summarizing guidelines for infection prevention and control for GI endoscopy, there are three important steps that must be highlighted: manual washing, HLD with automated endoscope reprocessor, and drying. Strict adherence to current guidelines is required because compared to any other medical device, the GI endoscope is associated with more outbreaks linked to inadequate cleaning or disinfecting during HLD. Both experimental evaluation on the surveillance bacterial cultures and in-use clinical results have shown that, the monitoring of the stringent processes to prevent and control infection is an essential component of the broader strategy to ensure the delivery of safe endoscopy services, because endoscope reprocessing is a multistep procedure involving numerous factors that can interfere with its efficacy. Based on our years of experience in the surveillance of culture monitoring of endoscopic reprocessing, we aim in this study to carefully describe what details require attention in the GI endoscopy disinfection and to share our experience so that patients can be provided with high quality and safe medical practices. Quality management encompasses all aspects of pre- and postprocedural care including the efficiency of the endoscopy unit and reprocessing area, as well as the endoscopic procedure itself.
文摘目的建立不同剂量双酚S(Bisphenol S,BPS)暴露动物实验模型,分析大鼠尿液中BPS内暴露水平的动态变化。方法通过灌胃给药建立对照组、1μg/kg低剂量组、100μg/kg中剂量组和10 mg/kg高剂量组Sprague Dawley(SD)大鼠暴露模型,使用超高效液相色谱-串联质谱法(Ultra High Performance Liquid Chromatography Tandem Mass Spectrometry,UPLC-MS/MS)内标法检测大鼠在连续6周暴露不同剂量BPS后其尿样中BPS含量的变化。结果目标物BPS在0.2~100μg/L的范围内呈良好线性关系,r^(2)≥0.998,方法检出限为0.01μg/L,定量限为0.03μg/L。对大鼠尿液的检测结果表明,随着暴露时间的增加,BPS在各剂量组大鼠体内的生物累积效应明显,尿液中BPS的内暴露水平在给药的6周中持续升高,且从给药后的第一周开始,尿液BPS含量的组间差异均有统计学意义(P<0.05)。结论本研究成功建立了不同剂量BPS暴露的SD大鼠动物实验模型,准确测定了大鼠连续6周尿液中双酚S的内暴露水平,为BPS毒理学剂量-效应关系研究提供参考。
文摘The research and developments of a new type of inorganic ion exchanger, crystalline silicotitanate (CST) are reviewed. This material is stable against radiation, and the CST has high selectivity for Cs over Na, K and Rb. It performs well in acidic, neutral, and basic solutions. The results of ion exchange tests show that CST is an excellent candidate for Cs removal from high-level liquid waste.
