中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共5条，第1-5条

帮助

条数/页：排序方式：
	海洋微塑料对海水青鳉毒性效应研究进展分析 CNKI期刊论文 OAI收割 2023 作者: 马健; 李友训; 于道德; 赵中华; 田敬云 \| 收藏 \| 浏览/下载：12/0 \| 提交时间：2024/12/18 海水青鳉微塑料毒性聚苯乙烯聚氯乙烯
	微塑料对微藻生长及其释放三卤代甲烷的影响 CNKI期刊论文 OAI收割 2021 作者: 郎小平; 何真; 陈岩; 周立敏; 杨桂朋 \| 收藏 \| 浏览/下载：7/0 \| 提交时间：2024/12/18 三卤代甲烷微塑料聚苯乙烯三角褐指藻生长抑制
	微塑料和芘对菲律宾蛤仔的毒性效应研究期刊论文 OAI收割海洋通报, 2021, 卷号: 40, 期号: 6, 页码: 644-656 作者: 柳佳佳; 朱效鹏; 滕佳; 赵建民; 李成华 \| 收藏 \| 浏览/下载：10/0 \| 提交时间：2024/01/26 菲律宾蛤仔聚苯乙烯微塑料芘生理响应氧化应激免疫防御
	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：154/0 \| 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.
	海岸环境中两类软质微塑料表面生物膜DNA的提取方法比较与优化期刊论文 OAI收割海洋学报, 2018, 卷号: 40, 期号: 12, 页码: 112-119 作者: 陈涛; 涂晨; 郭鹏鹏; 周倩; 骆永明 \| 收藏 \| 浏览/下载：49/0 \| 提交时间：2020/07/07 微塑料生物膜 DNA 聚乙烯薄膜(PE) 发泡类聚苯乙烯(EPS)