中文版 | English

在结果中检索

YIC-IR

浏览/检索结果: 共19条，第1-10条 帮助

已选(0)清除 条数/页：   排序方式：
典型亚热带耕地和高寒草地土壤质量变化和健康评估研究 学位论文
工学博士, 北京: 中国科学院大学, 2022
作者:  司绍诚
Adobe PDF(7072Kb)  |  收藏  |  浏览/下载：225/1  |  提交时间：2022/06/15
耕地  草地  长期定位施肥  土壤质量  土壤健康  
土壤环境中微塑料污染:来源、过程及风险 期刊论文
土壤学报, 2021, 卷号: 58, 期号: 2, 页码: 281-298
作者:  杨杰;  李连祯;  周倩;  李瑞杰;  涂晨;  骆永明
浏览  |  Adobe PDF(4648Kb)  |  收藏  |  浏览/下载：1419/327  |  提交时间：2021/12/01
土壤环境  微塑料  环境风险  研究进展  重点方向  
基于DNDC模型评估水位变化对滨海湿地净生态系统CO_2交换的影响 期刊论文
生态环境学报, 2021, 卷号: 30, 期号: 2, 页码: 254-263
作者:  陈雅文;  韩广轩;  赵明亮;  初小静;  李培广;  宋维民;  王晓杰
浏览  |  Adobe PDF(1332Kb)  |  收藏  |  浏览/下载：445/191  |  提交时间：2021/12/01
滨海湿地  水位变化  碳交换  DNDC模型  敏感性分析  情境模拟  
无权访问的条目 学位论文
作者:  毕冬雪
Adobe PDF(4589Kb)  |  收藏  |  浏览/下载：8/1  |  提交时间：2021/01/13
S~(2-)和Na~+胁迫下黄河三角洲高潮滩芦苇光合作用和抗氧化酶活性的响应 期刊论文
生态科学, 2020, 卷号: 39, 期号: 02, 页码: 175-181
作者:  陈琳;  张俪文;  刘子亭;  路峰;  颜坤;  韩广轩
浏览  |  Adobe PDF(1006Kb)  |  收藏  |  浏览/下载：297/52  |  提交时间：2020/07/08
黄河三角洲  盐胁迫  芦苇  光合作用  抗氧化酶活性  
S~(2-)和Na~+胁迫下黄河三角洲高潮滩芦苇光合作用和抗氧化酶活性的响应 期刊论文
生态科学, 2020, 卷号: 39, 期号: 2, 页码: 175-181
作者:  陈琳;  张俪文;  刘子亭;  路峰;  颜坤;  韩广轩
浏览  |  Adobe PDF(869Kb)  |  收藏  |  浏览/下载：219/45  |  提交时间：2021/12/01
黄河三角洲  盐胁迫  芦苇  光合作用  抗氧化酶活性  
铅锌矿区及农田土壤中重金属的化学形态与生物有效性研究 学位论文
工学硕士, 北京: 中国科学院大学, 2019
作者:  朱侠
Adobe PDF(2747Kb)  |  收藏  |  浏览/下载：14/0  |  提交时间：2024/03/20
重金属，铅锌矿区，复合污染土壤，化学形态，生物有效性  
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：492/0  |  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.  
土壤中二苯砷酸的吸附解吸、结合形态与代谢转化研究进展 期刊论文
生态环境学报, 2019, 卷号: 28, 期号: 12, 页码: 2447-2453
作者:  涂晨;  路露露;  朱濛;  韦婧;  刘颖;  骆永明
浏览  |  Adobe PDF(1362Kb)  |  收藏  |  浏览/下载：693/274  |  提交时间：2020/07/08
二苯砷酸  吸附解吸  结合形态  代谢转化  铁还原  硫酸盐还原  Diphenylarsenic Acid  Adsorption-desorption  Binding Species  Metabolic Transformation  Iron Reduction  Sulfate Reduction  
生物炭对土壤中氮磷有效性影响的研究进展 期刊论文
中国科学:生命科学, 2016, 期号: 9, 页码: 1085-1090
作者:  徐刚;  张友;  武玉;  邵宏波;  秦松
Adobe PDF(477Kb)  |  收藏  |  浏览/下载：766/302  |  提交时间：2016/12/09
生物炭  养分有效性  同位素示踪  土壤  微生物