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	大麦虫幼虫肠道菌群对聚苯乙烯泡沫塑料降解期刊论文 OAI收割环境科学, 2020, 卷号: 41, 期号: 12, 页码: 5609-5616 作者: 杨莉; 刘颖; 高婕; 彭霞薇; 白志辉 \| 收藏 \| 浏览/下载：15/0 \| 提交时间：2021/07/16 大麦虫聚苯乙烯(PS) 生物降解肠道菌群高通量测序
	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：142/0 \| 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.
	PS/PEG不相容体系的结晶行为研究期刊论文 OAI收割西安工业大学学报, 2015, 卷号: 35, 期号: 6, 页码: 473-478 作者: 罗春燕; 陈卫星; 高瑛收藏 \| 浏览/下载：15/0 \| 提交时间：2017/01/23 聚乙二醇(PEG) 聚苯乙烯(PS) 结晶行为相分离
	用小角x光散射研究超临界流体抗溶剂过程中聚苯乙烯链尺寸和构象变化期刊论文 OAI收割北京联合大学学报, 2000, 期号: 4, 页码: 53-55 作者: 霍清; 李丹; 刘志敏; 韩布兴; 董宝中收藏 \| 浏览/下载：18/0 \| 提交时间：2015/12/25 超临界二氧化碳聚苯乙烯(PS) 抗溶剂法(SAS) 小角x光散射(SAXS)
	分子间链缠结与高聚物的转变和松驰学位论文 OAI收割博士, 中国科学院长春应用化学研究所: 中国科学院长春应用化学研究所, 1999 黄定海收藏 \| 浏览/下载：991/16 \| 提交时间：2011/01/17 玻璃化转变结构松弛酞侧基聚芳醚砜（PES－C）聚碳酸酯（PC）聚苯乙烯（PS）结构松弛活化能 KWW 方程 NM 模型非线性参数非指数性参数特征松弛时间极限焓松弛快速蒸发法单链高聚物临界浓度链缠结