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	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：147/0 \| 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.
	Preparation and characterization of a thermoresponsive gigaporous medium for high-speed protein chromatography 期刊论文 OAI收割 Analytica Chimica Acta, 2015, 期号: 0, 页码: 617-624 作者: Qu, J. B.; Chen, Y. L.; Huan, G. S.; Zhou, W. Q.; Liu, J. G. 收藏 \| 浏览/下载：31/0 \| 提交时间：2015/04/01 Gigaporous polystyrene microspheres Thermoresponsive polymer brushes Protein chromatography N-isopropylacrylamide Atom transfer radical polymerization POLYSTYRENE MICROSPHERES AQUEOUS CHROMATOGRAPHY LIQUID-CHROMATOGRAPHY STATIONARY-PHASE SEPARATION POLYMERS SILICA BEADS
	A Solid Homogeneous Zirconocene Catalyst from Cp(2)ZrCl(2) Supported on Porous Polymer Particles 期刊论文 OAI收割 journal of polymer science part a-polymer chemistry, 2011, 卷号: 49, 期号: 6, 页码: 1503-1507 Lei JH; Li DL; Wang HH; Wang ZQ; Zhou GY 收藏 \| 浏览/下载：52/0 \| 提交时间：2012/06/11 ALPHA-OLEFIN POLYMERIZATION CROSS-LINKED POLYSTYRENE ETHYLENE POLYMERIZATION METALLOCENE CATALYSTS RAC-PH2SI(IND)(2)ZRCL2 CATALYST FUNCTIONALIZED POLYSTYRENE PROPENE POLYMERIZATION BEADS STEREOSPECIFICITY COMPLEXES
	Monodispersed Magnetic Polystyrene Beads with Excellent Colloidal Stability and Strong Magnetic Response 期刊论文 OAI收割 MACROMOLECULAR RAPID COMMUNICATIONS, 2010, 卷号: 31, 期号: 20, 页码: 1805-1810 作者: Niu, Mu; Du, Meihong; Gao, Zhenyu; Yang, Chunhui; Lu, Xianyong \| 收藏 \| 浏览/下载：11/0 \| 提交时间：2019/04/09 Colloidal Stability Magnetic Response Monodispersed Magnetic Beads Polymerization Polystyrene
	Surface-modified polystyrene beads as photografting imprinted polymer matrix for chromatographic separation of proteins 期刊论文 OAI收割 journal of chromatography a, 2009, 卷号: 1216, 期号: 5, 页码: 807-814 作者: Qin, Lei; He, Xi-Wen; Zhang, Wei; Li, Wen-You 收藏 \| 浏览/下载：28/0 \| 提交时间：2010/11/30 Molecular imprinting Protein separation Polystyrene beads Iniferter Chromatography
	Effective heterogenization and catalytic use of active C(5)H(5)NiLX complex for the hydrosilylation 期刊论文 OAI收割 catalysis communications, 2008, 卷号: 9, 期号: 8, 页码: 1793-1798 作者: Xu, Z.; Lu, X. -H.; Xia, Q. -H.; Lou, Z. -W.; Ye, C. -P. 收藏 \| 浏览/下载：30/0 \| 提交时间：2015/11/12 polystyrene beads immobilization heterogeneous solid nickel complex catalyst hydrosilylation
	Preparative purification of polyethylene glycol derivatives with polystyrene-divinylbenzene beads as chromatographic packing 期刊论文 OAI收割 BIOORGANIC & MEDICINAL CHEMISTRY LETTERS, 2007, 卷号: 17, 期号: 20, 页码: 5605-5609 作者: Yu, Pengzhan; Li, Xingqi; Li, Xiunan; Lu, Xiuling; Ma, Guanghui 收藏 \| 浏览/下载：80/0 \| 提交时间：2013/10/15 polystyrene-divinyl benzene beads purification of polyethylene glycol derivatives preparative reversed-phase chromatography
	Effect of swelling response of the support particles on ethylene polymerization 期刊论文 OAI收割 polymer, 2007, 卷号: 48, 期号: 9, 页码: 2481-2488 Shi LY; Qin YX; Cheng WX; Chen H; Tang T 收藏 \| 浏览/下载：18/0 \| 提交时间：2010/07/13 METALLOCENE CATALYSTS OLEFIN POLYMERIZATION PROPYLENE POLYMERIZATION POLY(STYRENE-CO-DIVINYLBENZENE) BEADS RAC-PH2SI(IND)(2)ZRCL2 CATALYST PHASE POLYMERIZATION KINETIC-ANALYSIS ZIEGLER-NATTA POLYSTYRENE FRAGMENTATION