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过度劳动对离职意向的影响:基于健康风险感知视角 期刊论文  OAI收割
中国临床心理学杂志, 2023, 卷号: 31, 期号: 1, 页码: 208-212,158
作者:  
陈晔;  李商;  陈毅文
  |  收藏  |  浏览/下载:4/0  |  提交时间:2023/05/21
成对尿液和室内灰尘中几类新型污染物的污染特征和人体暴露研究 学位论文  OAI收割
北京: 中国科学院大学;中国科学院生态环境研究中心, 2021
作者:  
王雲
  |  收藏  |  浏览/下载:25/0  |  提交时间:2022/06/20
广东省某 矿区周边农田土壤重金属污染 风险评价与管控 学位论文  OAI收割
北京: 中国科学院生态环境研究中心, 2019
作者:  
谢武双
  |  收藏  |  浏览/下载:53/0  |  提交时间:2020/07/28
黄海海洋典型物种中全氟烷基酸的赋存特征及其健康风险 学位论文  OAI收割
北京: 中国科学院生态环境研究中心, 2019
作者:  
张安琪
  |  收藏  |  浏览/下载:29/0  |  提交时间:2020/07/29
食用蔬菜能吸收和积累微塑料 期刊论文  OAI收割
科学通报, 2019, 卷号: 64, 期号: 9, 页码: 928-934
作者:  
李连祯;  周倩;  尹娜;  涂晨;  骆永明
  |  收藏  |  浏览/下载:146/0  |  提交时间:2020/06/17
微塑料  生菜  聚苯乙烯微球  吸收  积累  健康风险  microplastics  lettuce  polystyrene microbeads  uptake  accumulation  human health risk  Microplastic (MP, 100 nm-5 mm) may present an attributable risk to ecosystem and human health, and its pollution has become a global environmental concern. Despite a wealth of information on the accumulation of MPs in aquatic species, there is no information on the uptake and accumulation of MPs by higher plants. Terrestrial edible plants are directly exposed to MPs when agricultural soil was applied with organic manure, sewage sludge as fertilizer or plastic mulching. In this paper, the uptake of two sizes of polystyrene (PS) microbeads (0.2 and 1.0 mum) and then their distribution and migration in an edible plant lettuce were firstly investigated based on laboratory experiments. We used fluorescent markers to track PS microbeads in plant tissues and found fluorescence to be a sensitive and reliable detection method. Sections from untreated control lettuce showed no autofluorescence. When roots were treated with fluorescently labeled PS microbeads, the microbeads could be identified by its fluorescence. Our main study investigated the uptake of 0.2 mum beads, as few luminescence signals were observed in lettuce roots for 1.0 mum beads in our experiment. We observed that 0.2 mum fluorescent microbeads were extracellularly trapped in the root cap mucilage (which is a highly hydrated polysaccharide) and a dark green tip (which was typical of lettuce roots exposed to label PS beads) was usually visible to the naked eye. Confocal images revealed that the PS luminescence signals were mainly located in the vascular system and on the cell walls of the cortex tissue of the roots, indicated that the beads passed through the intercellular space via the apoplastic transport system. Once inside the central cylinder, the 0.2 mum PS beads were transferred from the roots to the stems and leaves via the vascular system following the transpiration stream. We also observed that the PS beads adhered to one another and self-assembled systematically into grape-like and (chain) string-like clusters in the intercellular space of the root and stem vascular tissue of lettuce plant. In contrast to the root and stem, PS beads were dispersed in the leaf tissue. Here, for the first time we provide evidence of the adherence, uptake, accumulation, and translocation of submicrometer MPs within an edible plant. Our findings highlight the previously underappreciated human exposure pathway to MPs through the consumption of contaminated crops and emphasize the need for new management strategies to control the release of MPs waste products into the terrestrial environment. Ultimately, the potential impacts of low range sized MPs on food safety of crop plants and human health need to be urgently considered.  
Arsenic distribution,transport and environmental risk in the Indus Valley, Paksitan 学位论文  OAI收割
北京: 中国科学院大学;中国科学院青藏高原研究所, 2018
作者:  
Faizan-ur-Rehman Qaiser
  |  收藏  |  浏览/下载:37/0  |  提交时间:2019/08/28
我国饮用水污染物非致癌及致癌健康风险评价——以砷及亚硝胺为例 学位论文  OAI收割
北京: 中国科学院大学, 2017
作者:  
张秋秋
  |  收藏  |  浏览/下载:68/0  |  提交时间:2018/07/04
典型原生高砷地区砷暴露及其吸附去除机理研究 学位论文  OAI收割
博士, 北京: 中国科学院研究生院, 2014
作者:  
崔金立
收藏  |  浏览/下载:59/0  |  提交时间:2016/07/13
基于伤残调整寿命年(DALYs)的饮用水健康风险评价 学位论文  OAI收割
硕士, 北京: 中国科学院研究生院, 2014
作者:  
潘申龄
收藏  |  浏览/下载:301/0  |  提交时间:2015/06/26
全二维色谱非目标筛查方法研究 学位论文  OAI收割
硕士, 北京: 中国科学院研究生院, 2013
宋瀚文
收藏  |  浏览/下载:47/0  |  提交时间:2014/09/01