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聚合物表面润滑黏附改性及应用探索 学位论文
北京: 中国科学院大学, 2202
作者:  冯海燕
收藏  |  浏览/下载：21/0  |  提交时间：2023/09/27
基于化学发光信号读出的电位型传感器的构建与应用 学位论文
中国科学院烟台海岸带研究所: 中国科学院烟台海岸带研究所, 2023
作者:  高雪情
收藏  |  浏览/下载：13/0  |  提交时间：2023/06/29
微纳塑料的制备、标记及在复杂基质中的定量检测研究 学位论文
: 中国科学院大学, 2022
作者:  高琦
收藏  |  浏览/下载：20/0  |  提交时间：2022/07/08
3D多级孔rGO/TiO2复合材料的构筑及其光催化性能研究 期刊论文
无机材料学报, 2021, 卷号: 36, 期号: 10, 页码: 1-8
作者:  李翠霞;  孙会珍;  金海泽;  史晓;  李文生
收藏  |  浏览/下载：4/0  |  提交时间：2021/10/20
基于光镊介质微球的光学超分辨成像技术研究 学位论文
中国科学院光电技术研究所: 中国科学院大学, 2021
作者:  刘锡
收藏  |  浏览/下载：23/0  |  提交时间：2021/06/11
一种中空SiO微球作为智能储油器的多孔聚酰亚胺自润滑复 合材料 专利
专利号: ZL201810563074.4, 申请日期: 2020-09-22,
作者:  王廷梅;  邵明超;  王超;  李宋;  王齐华
收藏  |  浏览/下载：10/0  |  提交时间：2021/01/28
多孔聚酰亚胺/纳米硅复合含油材料的制备与摩擦学性能研究 学位论文
北京: 中国科学院大学, 2020
作者:  贾卫红
收藏  |  浏览/下载：67/0  |  提交时间：2021/04/13
禾本科作物小麦能吸收和积累聚苯乙烯塑料微球 期刊论文
科学通报, 2020, 卷号: 65, 期号: 20, 页码: 2120-2127
作者:  李瑞杰;  李连祯;  张云超;  杨杰;  涂晨
收藏  |  浏览/下载：16/0  |  提交时间：2021/12/01
钛、镁及其合金材料表面减摩抗磨及耐蚀性能研究 学位论文
北京: 中国科学院大学, 2019
作者:  李朝霞
收藏  |  浏览/下载：99/0  |  提交时间：2019/10/31
食用蔬菜能吸收和积累微塑料 期刊论文
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：63/0  |  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.  

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