检索结果-南通市图书馆

In situ combined chemical and biological assessment of estrogenic pollution in a water recycling system

Journal of environmental Sciences 2016年第5期28卷 216-223页

作者： Yulang Chi Qiansheng Huang Huanteng Zhang Yajie Chen Sijun Dong Key Lab of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences

Estrogenic pollution and its control in aquatic systems have drawn substantial attention around the world. The chemical and biological assessment approaches currently utilized in the laboratory or field cannot give an integrated assessment of the pollution when used separately. In this study, in situ chemical and biological methods were combined to detect pollution in a water recycling system. Data for the water quality index（WQI） demonstrated that the water treatment resulted in the decline of pollution from upstream to downstream.Wild male Nile tilapia, Oreochromis niloticus, was sampled in June and September. The concentrations of four common endocrine disrupting chemicals（EDCs） were determined in the tilapia liver by chromatographic analysis methods. The level of 17β-estradiol（E2） declined from upstream to downstream in both months. In contrast, the levels of bisphenol A（BPA）,di-（2-ethylhcxyl） phthalate（DEHP）, and perfluorooctane sulfonate（PFOS） did not display this declining tendency. The highest relative expression of vitellogenin 1（VTG1） was observed in tilapia from upstream, then the level significantly decreased along the water system. The relative expression levels of CYP1A1 in the water system were also significantly higher than that of the control. However, no declining trend could be observed along the water system. The change of VTG1 expression corresponded well with that of E2 levels in the tilapia liver. Overall,our study assessed the pollution by endocrine disruptors using chemical and biological data with good correspondence. This study also demonstrated the effectiveness of the water recycling system in eliminating estrogen pollution in municipal sewage.

关键词： In situ sampling Vitellogenin 1 17β-Estradiol Endocrinedisrupting chemicals Oreochromis niloticus Water recycling system

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Epithelial-mesenchymal transition effect of fine particulate matter from the Yangtze River Delta region in China on human bronchial epithelial cells

引用

Journal of environmental Sciences 2018年第4期30卷 155-164页

作者： Yulang Chi Qiansheng Huang Yi Lin Guozhu Ye Huimin Zhu Sijun Dong Center for Excellence in urban Atmospheric environment Institute of Urban Environment Chinese Academy of Sciences Key Lab of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences College of Resources and environment University of Chinese Academy of Sciences

Epidemiological studies have demonstrated that fine particulate matter（PM（2.5）） exposure causes airway inflammation, which may lead to lung cancer. The activation of epithelial–mesenchymal transition（EMT） is assumed to be a crucial step in lung tumor metastasis and development. We assessed the EMT effect of low concentrations（0, 0.1, 1.0, and 5.0 μg/m L）of PM（2.5） organic extract on a human bronchial epithelial cell line（BEAS-2 B）. PM（2.5） samples were collected from three cities（Shanghai, Ningbo, and Nanjing） in the Yangtze River Delta（YRD） region in autumn 2014. BEAS-2 B cells were exposed to the PM（2.5） extract to assess cell viability, invasion ability as well as the relative m RNA and protein expressions of EMT markers. Our findings revealed that BEAS-2 B cells changed from the epithelial to mesenchymal phenotype after exposure. In all groups, PM（2.5） exposure dose-dependently decreased the expression of E-cadherin and increased the expression of Vimentin. The key transcription factors, including ZEB1 and Slug, were significantly up-regulated upon exposure. These results indicated that the PM（2.5） organic extract induced different degrees of EMT progression in BEAS-2 B cells. The cell invasion ability increased in a concentration-dependent manner after 48 hr of treatment with the extract. This study offers a novel insight into the effects of PM（2.5） on EMT and the potential health risks associated with PM（2.5） in the YRD region.

关键词： PM2.5 BEAS-2B Epithelial–mesenchymal transition Cell invasion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Functional magnetic nanoparticles for facile viable but nonculturable bacteria separation and purification

引用

Frontiers of environmental Science & Engineering 2016年第6期10卷 123-128页

作者： Chunming Wang Huirong Lin Chengsong Ye Key Lab of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China

Viable But Nonculturable （VBNC） Bacteria, which represent a unique population of microorganisms in drinking water systems, have become a potential threat to human health. Current studies on VBNC ceils usually fail to obtain pure VBNC state bacteria, which may lead to inaccurate results. We therefore introduce a novel method of VBNC cell separation and puriticatlon in this paper. PAH-coated magnetic nanoparticles （MNPs） were synthesized and found to be capable of capturing and releasing bacterial cells with high efficiency. With the aid of an additional incubation step, VBNC cells were easily isolated and purified from normal bacteria using functional MNPs. Our method represents a new technique that can be utilized in studies of VBNCs.

关键词： Drinking water biosafety VBNC Nanoparticles Magnetic separation and purification

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Gut microbiota and transcriptome response of earthworms(Metaphire guillelmi)to polymyxin B exposure

引用

环境科学学报:英文版 2023年第11期133卷 37-47页

作者： Jun Zhao Guilan Duan Yongguan Zhu Dong Zhu State key lab of urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China key laboratory of urban environment and health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

Polymyxin B(PMB)has received widespread attention for its use as a last-line therapy against multidrug-resistant bacterial infection.However,the consequences of unintended PMB exposure on organisms in the surrounding environment remain inconclusive.Therefore,this study investigated the effects of soil PMB residue on the gut microbiota and transcriptome of earthworms(Metaphire guillelmi).The results indicated that the tested doses of PMB(0.01–100 mg/kg soil)did not significantly affect the richness and Shannon’s diversity index of the earthworm gut microbiota,but PMB altered its community structure and taxonomic composition.Moreover,PMB significantly affected Lysobacter,Aeromonas,and Sphingomonas in the soil microbiota,whereas Pseudomonas was significantly impacted the earthworm gut microbiota.Furthermore,active bacteria responded more significantly to PMB than the total microbial community.Bacterial genera such as Acinetobacter and Bacillus were highly correlated with differential expression of some genes,including up-regulated genes associated with folate biosynthesis,sulphur metabolism,and the IL-17 signalling pathway,and downregulated genes involved in vitamin digestion and absorption,salivary secretion,other types of O-glycan biosynthesis,and the NOD-like receptor signalling pathway.These results suggest that adaptation to PMB stress by earthworms involves changes in energy metabolism,their immune and digestive systems,as well as glycan biosynthesis.The study findings help elucidate the relationship between earthworms and their microbiota,while providing a reference for understanding the environmental risks of PMB.

关键词： Microbiome Antibiotic Soil fauna Active microbiota Transcriptome

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Low nutrient levels as drinking water conditions can reduce the fitness cost of efflux pump-mediated ciprofloxacin resistance in Pseudomonas aeruginosa

引用

Journal of environmental Sciences 2019年第9期31卷 123-132页

作者： Wenfang Lin Kun Wan Jie Zeng Jingjing Li Xi Li Xin Yu Key Lab of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China University of Chinese Academy of Sciences Beijing 100049 China

The long-term persistence of antibiotic resistance in the environment, especially in drinking water, is a public health concern. Expression of an efflux pump, an important mechanism of resistance to antibiotics, usually confers a fitness cost in bacteria. In this study, we aimed to determine why antibiotic resistance conferred by overexpression of an efflux pump persisted in low-nutrient environments(TOC key factor in determining the persistence of antibiotic resistance conferred by efflux pumps in the natural environment with trace amounts or no antibiotics.

关键词： Efflux pumps Antibiotic resistance Fitness cost Low nutrient nfxB mutation Ciprofloxacin resistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Sources appointment and health risks of PM_(2.5)-bound trace elements in a coastal city of southeastern China

引用

Journal of environmental Sciences 2024年第4期138卷 561-571页

作者： Ziyi Lin Xiaolong Fan Gaojie Chen Youwei Hong Mengren Li Lingling Xu Baoye Hu Chen Yang Yanting Chen Zhiqian Shao Jinsheng Chen Center for Excellence in Regional Atmospheric environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy ofSciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Minnan Normal University Zhangzhou 363000China

To gain a comprehensive understanding of sources and health risks of trace elements in an area of China with high population densities and low PM_(2.5)concentrations,15 trace elements(Al,K,Ca,Ti,V,Cr,Mn,Fe,Ni,Cu,Zn,As,Sn,Ba,Pb)in PM_(2.5)were monitored from December 2020 to November 2021 in a representative city,Xiamen.The concentrations of trace elements in Xiamen displayed an obvious seasonal variation and were dominated by K,Fe,Al,Ca and Zn.Based on Positive Matrix Factorization analysis,source appointment revealed that the major sources of trace elements in Xiamen were traffic,dust,biomass and firework combustion,industrial manufacture and shipping emission.According to health risk assessment combined with the source appointment results,it indicated that the average noncarcinogenic risk was below the threshold and cancer risk of four hazardous metals(Cr,Ni,As,Pb)exceeded the threshold(10^(-6)).Traffic-related source had almost half amount of contribution to the health risk induced by PM_(2.5)-bound trace elements.During the dust transport period or Spring Festival period,the health risks exceeded an acceptable threshold even an order of magnitude higher,suggesting that the serious health risks still existed in low PM_(2.5)environment at certain times.health risk assessment reminded that the health risk reduction in PM_(2.5)at southeastern China should prioritize traffic-related hazardous trace elements and highlighted the importance of controlling vehicles emissions in the future.

关键词： PM_(2.5)-bound trace elements Seasonal variations Source appointment health risks Traffic-related source

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Metabolic responses of indigenous bacteria in chicken faeces and maggots to multiple antibiotics via heavy water labeled single-cell Raman spectroscopy

引用

Journal of environmental Sciences 2022年第3期34卷 394-402页

作者： Oladipo Oladiti Olaniyi Hongzhe Li Yongguan Zhu Li Cui Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Department of Microbiology Federal University of TechnologyPMB 704 AkureNigeria University of Chinese Academy of Sciences Beijing 100049China

The use of maggots derived from chicken faeces as fish diets might serve as a vehicle for the widespread of multiple antibiotic resistant bacteria(ARB) in the environment. Heavy water labeled single-cell Raman spectroscopy(D_(2)O-Raman) was applied to detect the metabolic responses of indigenous bacteria in chicken faeces and maggots to different concentrations of combined colistin, kanamycin, and vancomycin. By incubating the samples with D_(2)O and antibiotics, metabolically active bacterial cells to antibiotics were distinguished from those inactive by the exhibition of C-D Raman band. Using the C-D band as a universal metabolic biomarker, 96% and 100% of cells in chicken faeces and maggots were revealed to be metabolically active to 1 × minimum inhibition concentration(MIC) of the aforementioned antibiotics. A noticeable decrease in the percentage of active cells from 96% to 76% in faeces and 100% to 93% in maggots was observed at 5 × MIC of antibiotics. However, these ratios were still far above that obtained from the same faeces(1.84%) and maggots(0.51%) samples using a cultivation method, indicating the wide presence of nongrowing but metabolically active bacterial cells under antibiotic treatment. Conclusively, the cultureindependent D_(2)O-Raman approach detected and quantified a large portion of metabolically active indigenous bacteria to multiple antibiotics in their native environments, illustrating the great potential risks of these active cells to spread antibiotic resistance via food chain.

关键词： Chicken faeces and maggot Antibiotic resistance Heavy water-Raman spectroscopy Single-cell Metabolically active cells

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

environmental risk assessment of selected organic chemicals based on TOC test and QSAR estimation models

引用

Journal of environmental Sciences 2018年第2期30卷 23-31页

作者： Yulang Chi Huanteng Zhang Qiansheng Huang Yi Lin Guozhu Ye Huimin Zhu Sijun Dong Key Lab of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China College of Resources and environment University of Chinese Academy of Sciences Beijing 100049 China

environmental risks of organic chemicals have been greatly determined by their persistence,bioaccumulation, and toxicity（PBT） and physicochemical properties. Major regulations in different countries and regions identify chemicals according to their bioconcentration factor（BCF） and octanol–water partition coefficient（Kow）, which frequently displays a substantial correlation with the sediment sorption coefficient（Koc）. Half-life or degradability is crucial for the persistence evaluation of chemicals. Quantitative structure activity relationship（QSAR） estimation models are indispensable for predicting environmental fate and health effects in the absence of field-or laboratory-based data. In this study, 39 chemicals of high concern were chosen for half-life testing based on total organic carbon（TOC） degradation,and two widely accepted and highly used QSAR estimation models（i.e., EPI Suite and PBT Profiler） were adopted for environmental risk evaluation. The experimental results and estimated data, as well as the two model-based results were compared, based on the water solubility, Kow, Koc, BCF and half-life. environmental risk assessment of the selected compounds was achieved by combining experimental data and estimation models. It was concluded that both EPI Suite and PBT Profiler were fairly accurate in measuring the physicochemical properties and degradation half-lives for water, soil, and sediment.However, the half-lives between the experimental and the estimated results were still not absolutely consistent. This suggests deficiencies of the prediction models in some ways, and the necessity to combine the experimental data and predicted results for the evaluation of environmental fate and risks of pollutants.

关键词： QSAR Risk assessment Predictive toxicology TOC Physicochemical property

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Silencing the silent pandemic:eliminating antimicrobial resistance by using bacteriophages

引用

Science China(Life Sciences) 2022年第9期65卷 1890-1893页

作者： Mao Ye Jian-Qiang Su Xin-Li An Yong-Guan Zhu Institute of Soil Science Chinese Academy of SciencesNanjing 210008China Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China State key lab of urban and Regional Ecology Research Center for Eco-environmental SciencesChinese Academy of SciencesBeijing 100085China

As a result of the global spread of antibiotic-resistant bacteria(ARB)and antibiotic resistance genes(ARGs)among humans,animals,and environments,antibiotic resistance has become a silent pandemic that threatens public... 详细信息

关键词： resistance eliminating silent

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Practice and Research Progress on Ecosystem Conservation in Transboundary Areas

引用

Chinese Geographical Science 2016年第1期26卷 109-116页

作者： TANG Lina GUI Liuming SHAO Guofan WANG Luyan SHI Longyu Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of Sciences Department of Forestry and Natural Resources Purdue University

Many ecosystems extend across national or political boundaries. The consistent and effective protection of these ecosystems in transboundary areas(ETAs) is an important global research focus. Previous research on the protection of such areas can be categorized into seven themes: 1) ecological conservation of a single ETA; 2) investigation of the effects of a single conservation measure on a specific ETA; 3) determination of species-level effects due to ETA conservation; 4) comparison of the same protection measures between different ETAs; 5) introduction of a single conservation measure to a specific ETA; 6) understanding the relationship between conservation and sustainable development; and 7) generalization across multiple ETA conservation cases. The protection of ETAs involves various considerations, including funding support, demand and will for collaboration, community and public participation, historical and cultural factors, political backgrounds, uniqueness of biological resources, formulation of laws and regulations, founding of specialized administrative departments, non-governmental organizations, and fairness. Here, we briefly explain the research themes and considerations related to ETA conservation. The most important finding is that most major research themes do not focus on the challenges of ETA conservation. We use two nature reserves located between China and North Korea as examples to identify specific ways to improve ETA conservation on Changbai Mountains. The efficiency of ETA administration still remains low. The study of ETA conservation should focus on concrete regional information and aim to improve existing measures through the accumulation of experience.

关键词：生态保护 ETA 保护措施可持续发展非政府组织自然保护区生态系统资金支持

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：