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毛发中甲基苯丙胺、苯丙胺、6-单乙酰吗啡及吗啡的检测阈值评估
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作者 施晓露 车鑫锋 +3 位作者 吴健美 狄斌 乔宏伟 王优美 《中国药科大学学报》 CAS CSCD 北大核心 2022年第5期554-562,共9页
建立并优化快速检测甲基苯丙胺、苯丙胺、6-单乙酰吗啡及吗啡在毛发中含量的超高效液相色谱-质谱(UPLC-MS/MS)方法,对吸毒者与毒品实验室技术人员毛发中目标物的浓度进行考察并进行阈值评估。将清洗后的毛发样品经甲醇-水(7∶3)在3000 r... 建立并优化快速检测甲基苯丙胺、苯丙胺、6-单乙酰吗啡及吗啡在毛发中含量的超高效液相色谱-质谱(UPLC-MS/MS)方法,对吸毒者与毒品实验室技术人员毛发中目标物的浓度进行考察并进行阈值评估。将清洗后的毛发样品经甲醇-水(7∶3)在3000 r/min条件下研磨提取100 s后调节进样体积为甲醇-水(1∶1)使用UPLC-MS/MS分析。色谱柱为Waters Acquity BEH C_(18)(2.1 mm×100 mm,1.7μm),流动相为5 mmol/L甲酸铵-0.1%甲酸水溶液及乙腈,0.4 mL/min梯度洗脱。质谱采用ESI+离子源,MRM多反应监测,测定4种目标物的定性离子对和定量离子对。优化后的方法定量限低,提取率较优化前更高。各目标物在0.01~5 ng/mg(除苯丙胺为0.01~4 ng/mg)范围内线性关系良好(R^(2)≥0.9996),定量限均为0.01 ng/mg,检出限范围为0.001~0.008 ng/mg;准确度、精密度基质效应和回收率均符合方法学要求。根据接受者操作特征(ROC)曲线、Youden指数、执法成本和执法力度等综合考量,得出4种目标物的参考阈值为甲基苯丙胺≥0.1 ng/mg;苯丙胺≥0.025 ng/mg;6-单乙酰吗啡≥0.05 ng/mg;吗啡≥0.05 ng/mg。本实验建立的方法可快速、高效、准确地测定甲基苯丙胺、苯丙胺、6-单乙酰吗啡及吗啡的含量。本研究为公安系统今后制定涉毒人员毛发样品检测规范的检测阈值提供了参考。 展开更多
关键词 毒品 毛发检测 前处理优化 检测阈值评估 超高效液相色谱-质谱联用技术
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Assessing proprioception:A critical review of methods 被引量:5
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作者 Jia Han Gordon Waddington +2 位作者 Roger Adams Judith Anson Yu Liuc 《Journal of Sport and Health Science》 SCIE 2016年第1期80-90,共11页
To control movement,the brain has to integrate proprioceptive information from a variety of mechanoreceptors.The role of proprioception in daily activities,exercise,and sports has been extensively investigated,using d... To control movement,the brain has to integrate proprioceptive information from a variety of mechanoreceptors.The role of proprioception in daily activities,exercise,and sports has been extensively investigated,using different techniques,yet the proprioceptive mechanisms underlying human movement control are still unclear.In the current work we have reviewed understanding of proprioception and the three testing methods:threshold to detection of passive motion,joint position reproduction,and active movement extent discrimination,all of which have been used for assessing proprioception.The origin of the methods,the different testing apparatus,and the procedures and protocols used in each approach are compared and discussed.Recommendations are made for choosing an appropriate technique when assessing proprioceptive mechanisms in different contexts. 展开更多
关键词 Joint motion sense Joint position sense Kinaesthesia Movement discrimination Propnoception
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Assessment of HRP2-Based RDT in Diagnosing Malaria Cases
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作者 Yemou Dieng Doudou Sow +9 位作者 Therese Dieng Abdourahmane Sow Babacar Faye Jean Louis Ndiaye Daouda Ndiaye Roger Cl6ment Tine Khadime Sylla Oumar Faye Oumar Ndir Oumar Gaye 《Journal of Life Sciences》 2012年第6期602-607,共6页
Background: HRP2-based Rapid Diagnostic Tests (RDTs) for malaria ensure a rational use of artemisinin-based combination therapy (ACT). The HRP2 antigen can go through the cerebrospinal fluid (CSF). Purpose: To... Background: HRP2-based Rapid Diagnostic Tests (RDTs) for malaria ensure a rational use of artemisinin-based combination therapy (ACT). The HRP2 antigen can go through the cerebrospinal fluid (CSF). Purpose: To assess the HRP2-based RDT in malaria and detect the HRP2 in CSF. Methods: From November 2006 to May 2007, all patients under 15 years showing clinical symptoms of malaria were included. RDT was performed on the CSF and peripheral blood. Results: Out of the 951 patients included, 131 (13.7%) were confirmed through RDT and 130 (13.6%) through thick blood smear. Sensitivity and specificity stood at 96.96% and 99.71% respectively, for uncomplicated cases and at 100% and 99.13% for severe cases. Tests to detect HRP2 in the CSF of 52 cases were negative. Conclusion: Tests to detect HRP2 in the CSF could make it possible to diagnose severe malaria cases when peripheral parasitemia would be below the detection threshold. 展开更多
关键词 MALARIA rapid diagnostic test PAEDIATRICS HRP2 antigen cerebrospinal fluid
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