稀土饲料添加剂在动物体内残留量的测定

用分光光度法测定鸡肉组织中稀土的残留量。

广州黄埔区夜鹭和池鹭体内汞浓度和分布特性

In this study,live fledglings of Nycticorax nycticorax and Ardeola bacchus at the Huangpu District of Guangzhou City were collected,and their primary feather,breast feather,tail feather,liver,chest muscle and egg shell were sampled for mercury determination.The results showed that these two heron species had a very similar distribution pattern of mercury concentration in their tissues and organs,i.e.,tail feather > breast and primary feather > liver > chest muscle > egg shell.Ardeola bacchus had higher levels of mercury in all its tissues than Nycticorax nycticorax.There were significant interspecific differences in mercury level for breast feather and primary feather.Because the collection of breast feather is easier and not harmful to birds,it is better to use it rather than primary or tail feather to monitor environmental pollution.The mercury level in breast feather was ten times higher than that in liver,lower than that in tail feather,but not significantly different to that in primary feather.The mercury concentrations in the tissues of Nycticorax nycticorax and Ardeola bacchus from Huangpu District of Guangzhou were similar to those from the suburbs of Chengdu,Sichuan Province,but lower than those from Taihu Lake,Jiangsu Province and higher than those from Hong Kong.

鲤对酚的积累、分配和释放研究

研究了酚在鲤 (Cyprinuscarpio)体内积累、分配和释放规律。鲤饲养于 0 0 0 5 ,0 0 2 5 ,0 0 5mg/L酚液中 ,在 32d内随时间延长积累量增加 ,肝、性腺是酚的主要蓄积器官。鲤体随酚浓度升高 ,浓缩系数下降。将受酚污染后的鲤重返清水中饲养 ,43d后肌肉、鳃释放率高 。

开放性放射性核素治疗后患者免住院的建议(ICRP 94报告要点解读)

国际辐射防护委员会(ICRP)94号报告建议开放性放射性核素治疗后患者可免住院,对个体患者做具体分析后作出住院与否的决定,不应仅根据估算的体内残留量一律要求住院。ICRP 94号报告以高端科研为基础,分析比较了住院与免住院的利弊。临床医师在实际工作中,应该对ICRP 94号报告正确理解,把现行实际情况与管理规划统一到ICRP 94号报告的实质中,以便在实践中很好地执行。