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Effect of dissolved organic matters on adsorption and desorption behavior of heavy metals in a water-level-fluctuation zone of the Three Gorges Reservoir, China 期刊论文
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, 2019, 卷号: 185, 页码: 7
作者:  Huang, Yang;  Fu, Chuan;  Li, Zhe;  Fang, Fang;  Ouyang, Wenjuan
收藏  |  浏览/下载：123/0  |  提交时间：2019/12/03
Co-transport of Pb(II) and oxygen-content-controllable graphene oxide from electron-beam-irradiated graphite in saturated porous media 期刊论文
JOURNAL OF HAZARDOUS MATERIALS, 2019, 卷号: 375, 页码: 297-304
作者:  Jiang, Yanji;  Yin, Xianqiang;  Guan, Duo;  Jing, Tao;  Sun, Huimin
收藏  |  浏览/下载：57/0  |  提交时间：2019/11/10
Infrared Skin-Like Active Stretchable Electronics Based on Organic-Inorganic Composite Structures for Promotion of Cutaneous Wound Healing 期刊论文
ADVANCED MATERIALS TECHNOLOGIES, 2019, 卷号: 4, 期号: 8, 页码: 10
作者:  Zhang LJ(张丽娟);  Jiang XX;  Jiang W;  Li S(李爽);  Chi YX
收藏  |  浏览/下载：4/0  |  提交时间：2019/10/14
Petroleum accumulation history of Nanbaxian belt - Study of gas generation and fluid phase, northern margin of Qaidam Basin, West of China 期刊论文
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, 2019, 卷号: 178, 页码: 449-458
作者:  Fu, Deliang;  Zhou, Shixin;  Ma, Yu;  Li, Jing;  Xu, Guosheng
收藏  |  浏览/下载：59/0  |  提交时间：2019/06/10
府谷次烟煤热解的反应分子动力学模拟 学位论文
: 中国科学院大学, 2019
作者:  高明杰
收藏  |  浏览/下载：9/0  |  提交时间：2020/06/17
NEK2 promotes proliferation, migration and tumor growth of gastric cancer cells via regulating KDM5B/H3K4me3 期刊论文
AMERICAN JOURNAL OF CANCER RESEARCH, 2019, 卷号: 9, 期号: 11, 页码: 2364-2378
作者:  Li, Yiwei;  Chen, Lijuan;  Feng, Lixing;  Zhu, Mengli;  Shen, Qiang
收藏  |  浏览/下载：8/0  |  提交时间：2020/07/01
Application of nuclear magnetic resonance technology to carbon capture, utilization and storage: A review 期刊论文
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING, 2019, 卷号: 11, 期号: 4, 页码: 892-908
作者:  Xu, Liang;  Li, Qi;  Myers, Matthew;  Chen, Quan;  Li, Xiaochun
收藏  |  浏览/下载：23/0  |  提交时间：2020/04/08
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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