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文献和实验Evaluation of PCB Dechlorination in Sediments
Polychlorinated biphenyls (PCBs) are important environmental contaml- nants. They are widely distributed and have been associated with toxic effects in wildlife, such as deformities and lowered reproductive success (1 ), and with hepatic
Methods for Evaluation of PCB Dechlorination in Sediments
chlorinated congeners formed tend to be more aerobically degradable and less toxic. Remedial action plans for PCB-contaminated sediments should therefore take mto account the extent of dechlorination that has occurred and the potential
Sysmex kx-21型血液分析仪是日本东亚公司近年推向市场的三分类18项参数的全自动血细胞分析仪。本文介绍几例该机长期使用后出现过的特殊故障和排除方法。1、故障现象一开机后仪器频繁报警更换稀释液,但稀释液量符合要求;运行更换试剂程序后故障依旧。1.1 故障分析先分析更换稀释液的报警原理:在正常情况下仪器是通过自身的稀释液杯(缓冲杯)中的浮子开关来判断杯中的稀释液是否达到要求,如果低于它的触发点,它则产生信号发送到CPU,由CPU发出指令开启SVl、SV2工作,促使杯中形成负压状况,通过负压
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