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141.
灵芝中重金属的检测及其健康风险初步评价 总被引:4,自引:0,他引:4
为了研究灵芝中重金属的污染状况,对北京市一些药店及部分中医门诊部所售的不同产地灵芝中的As、Hg、Pb等重金属元素含量进行了测定.结果表明,灵芝中As含量范围为0.016 ̄0.239mg·kg-1,平均值0.117mg·kg-1,Hg含量范围从未检出到0.43mg·kg-1,平均值0.115mg·kg-1,Pb含量范围从未检出到0.256mg·kg-1,平均值0.047mg·kg-1,As、Pb含量均符合我国《药用植物及制剂进出口绿色行业标准》,Hg有5例超标,占样品总数的25%,主要是野生灵芝.健康风险初步评价结果表明,服用灵芝的人群,成人每人每日通过灵芝摄入As、Hg、Pb分别为0.18 ̄2.3μg、0.17 ̄2.3μg、0.07 ̄0.94μg,分别占每日允许摄入量(ADI)的0.14% ̄1.9%、0.4% ̄5.4%、0.03% ̄0.4%,对人体健康风险不大.但是对于个别野生和人工种植灵芝而言,每日摄入总汞量可达0.47 ̄6.24μg,占ADI的1.1% ̄15%,对人体健康存在一定的风险. 相似文献
142.
底栖动物在水生生态系统健康评价中的作用分析 总被引:7,自引:0,他引:7
从生态系统健康的概念入手,通过对生态系统健康评价方法的研究和分析,对底栖动物尤其是大型底柄无脊椎动物在生态系统健康评价中的作用进行了分析和总结.生物监测法和多指标评价法是水生态系统健康评价的主要手段,而利用指示物种、预测模型和底柄生物的完整性指数等多种方法可以对水生态系统健康进行快速和准确的评价.如何完善底栖动物在生态系统健康评价中的作用并综合运用其他评价技术,以及结合评价结果对受损水生态系统进行生态修复和重建将是这一领域未来研究的重点所在. 相似文献
143.
采用生态系统健康理论分析开发区生态环境问题具有较强的理论意义和现实意义。着重构建了开发区生态系统健康评价的指标体系和模糊评价模型,提出评价标准。并对苏州高新区生态系统健康进行评价。进而指出制约因子并提出相应的诊断方案,为其优化生态系统结构和完善系统功能提供科学依据。 相似文献
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146.
Bass B Economou V Lee CK Perks T Smith SA Yip Q 《Environmental monitoring and assessment》2003,85(2):199-219
Indoor environmental health is now recognized as an important factor in preventing respiratory health problems in the United States. It is also a concern in Canada due to the amount of time that Canadians spend indoors because of cold weather and the potential for increased time indoors during the summer if theclimate warms. The negative health effects are often labeled assick building syndrome, but diagnosing a building or itsoccupants as sick is complicated by the variety of symptoms, thepresence of chronic versus acute symptoms and social andpsychological (socio-psychological) factors that may reduce theeffectiveness of an engineering solution. As a case study, thecontribution of various factors to indoor environmental health,in three buildings at the University of Toronto, was examinedusing five different methods. The results indicate that theinhabitants of the buildings consider features other than airquality in considering building health such as design,maintenance, funding cuts and socio-psychological factors. 相似文献
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148.
This paper describes and analyses the public health system response to the deadly earthquake in Sichuan province, China, in May 2008. Drawing on an experiential learning project consisting of a literature review and field research, including a series of interviews with medical and public health professionals, policy‐makers and first responders, a conceptual framework was developed to describe the response. This approach emphasises the pre‐existing preparedness level of the medical and public health systems, as well as social, economic and geo‐political factors that had an impact on mitigation efforts. This framework was used to conduct post‐disaster analyses addressing major response issues and examining methods employed during the public health response to the disaster. This framework could be used to describe and analyse the emergency response to other disasters. 相似文献
149.
The role of natural disaster in individual and relational adjustment in Sri Lankan mothers following the 2004 tsunami
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Alyssa Banford David C. Ivey Thulitha Wickrama Judith Fischer Anne Prouty Douglas Smith 《Disasters》2016,40(1):134-157
The purpose of this study is to examine the associations between maternal mental health distress symptoms, including depression and post‐traumatic stress disorder, the extent to which the presence of a child's disaster‐related physical health problem(s) have interfered with daily functioning, and family cohesion over time among Sri Lankan mothers who survived the tsunami on 26 December 2004. Study variables were measured using a self‐report questionnaire administered approximately four months after the event and three years later in summer 2008. Univariate, bivariate, and multivariate analyses were conducted. Path analysis was employed to assess the relationships between the key variables over time and the correlations in the study variables at each time point. Among other findings, the results of the path analysis indicated that post‐traumatic stress symptom distress four months after the disaster significantly predicted variance in family cohesion three years later. Clinical and empirical research implications are presented and discussed. 相似文献
150.
对1224个工种(岗位)的工人接触生产性毒物、粉尘、高温的状况以及部分工种(岗位)的工人体力劳动强度状况进行了调研,初步了解到机械工业的主要职业危害因素、危害分布、危害程度和特征。 相似文献