中国开放科研知识云: 检索

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.

Designing a Science Information Literacy Program for the Digital Age 期刊论文
Digital Presentation and Preservation of Cultural and Scientific Heritage, 2017, 卷号: No.VII, 页码: 53-62
作者: SvetlaBaykoucheva

收藏 | 浏览/下载：3/0 | 提交时间：2019/12/24

Science Information Literacy Bibliographic Management Electronic Laboratory Notebooks eScience

基于J2EE的实验室信息管理系统的设计与实现 学位论文
2016, 2015
魏腾云

收藏 | 浏览/下载：3/0 | 提交时间：2017/06/20

实验室信息管理系统 J2EE Laboratory Information Management System J2EE

某服装企业质量检测中心实验室信息管理系统的设计与实现 学位论文
2016, 2015
洪鹭珍

收藏 | 浏览/下载：2/0 | 提交时间：2017/06/20

质量检测中心实验室信息管理 J2EE Quality Test Center Laboratory Information Management J2EE

艺术类高校实验室教学管理系统的设计与实现 学位论文
2016, 2015
钟博之

收藏 | 浏览/下载：1/0 | 提交时间：2017/06/20

艺术类实验室管理信息系统 B/S架构 Arts University Laboratory Management Information System B/S Architecture

Advanced LMS Integration of SCORM Web Laboratories 期刊论文
IEEE Access, 2016, 卷号: Vol.4, 页码: 6352-6363
作者: JuanGó; IldefonsoRuano; JavierGá; mez; PabloCano

收藏 | 浏览/下载：10/0 | 提交时间：2019/12/24

Electronic learning Java Information and communication technology Education Adaptive learning Learning management systems Laboratories student experiment Adaptive learning E-learning tool E-learning standard laboratory learning management system

Research on Electrical and Electronic Laboratory Management System of Application-oriented University 会议论文
作者: Shen, Lirong

收藏 | 浏览/下载：2/0 | 提交时间：2019/12/06

Laboratory Information Management System (LIMS) Function Module Overall Lifecycle Management

基于ASP.NET的实验室信息管理系统设计与实现 学位论文
2015, 2014
陆健锋

收藏 | 浏览/下载：4/0 | 提交时间：2016/01/12

实验室信息管理高校信息化 ASPNET Laboratory Information Management College Information ASPNET

实验室管理信息系统的设计与实现 学位论文
2015, 2014
梁军

收藏 | 浏览/下载：1/0 | 提交时间：2016/01/12

实验室管理信息系统 SQL Laboratory Management Information System SQL

Downtime procedures for the 21st century: using a fully integrated health record for uninterrupted electronic reporting of laboratory results during laboratory information system downtimes. 期刊论文
American Journal Of Clinical Pathology, 2015, 卷号: Vol.143 No.1, 页码: 100-104
作者: KratzA.; OralB; DiazDL; HodEA; CullenRM

收藏 | 浏览/下载：1/0 | 提交时间：2019/12/30

Downtime Electronic medical record Generalist Informatics Laboratory information system Management/administration Scanning

在结果中检索

相关链接

CORC

联系我们