检索结果-南通市图书馆

The “neighbor avoidance effect” of microplastics on bacterial and fungal diversity and communities in different soil horizons

引用

environmental Science and Ecotechnology 2021年第4期8卷 13-21页

作者： Hong Yu Ying Zhang Wenbing Tan State Key Laboratory of environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing100012China State environmental protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental SciencesBeijing100012China

Microplastics are a new type of environmental pollutant,and pose a serious threat to soil *** is important to study microplastics effects on soil microorganisms to better understand their effects on terrestrial ***,we collected soil and microplastic samples from corn,pepper,peanut and cucumber fields in Shunyi District,Beijing,China,and used Illumina MiSeq high-throughput sequencing technology to analyze bacterial and fungal community composition and *** focused on microplastic surface and its surrounding“rhizosphere-like”soil in the 0e10 cm(humus)and 10e20 cm(eluvial)deep *** richness and diversity on microplastic surface were significantly lower than those in surrounding“rhizosphere-like”soil,and microbial richness and diversity were reduced to a greater extent in the humus horizon than in the eluvial *** likely enriched the microbes involved in their *** relative abundance levels of Cyanobacteria and Basidiomycota on microplastic surfaces were significantly higher than those in surrounding“rhizosphere-like”soil,while the relative abundance levels of Acidobacteria,Chloreflexi,and Mortierellomycota were higher in“rhizosphere-like”***,the relative abundance levels of pathways related to human diseases,animal pathogen,and fungal parasites were significantly higher on microplastic surfaces than in“rhizosphere-like”*** results show that the microbial diversity,richness,community structure and function between microplastic surfaces and surrounding“rhizosphere-like”soil are significantly different,leading to a“rhizosphere-like neighbor avoidance effect”between microplastic surfaces and the surrounding soil.

关键词： Microplastics Microbial diversity Community structure Rhizosphere Metabolic function

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

Lignin-phenol monomers govern the pyrolytic conversion of natural biomass from lignocellulose to products

引用

environmental Science and Ecotechnology 2021年第4期8卷 110-118页

作者： Hualing Hu Wenbing Tan Beidou Xi State Key Laboratory of environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing100012China State environmental protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental SciencesBeijing100012China

The effect of the interaction between lignin-phenol monomers and holocellulose in natural biomass on the distribution of pyrolysis products remains *** results of this study showed that the interaction between lignin and holocellulose during the pyrolysis of natural biomass became more pronounced as the pyrolysis temperature *** interaction between lignin and holocellulose in the natural crosslinked structure promoted the generation of CO and inhibited the generation of CO2 at 750*** inhibited the decarboxylic reaction of hemicellulose during pyrolysis but was important for the generation of levoglucosan during cellulose *** slowed the demethoxyreaction of lignin guaiacol but promoted the removal of aliphatic hydrocarbon substituents from the aromatic *** cinnamyl phenol monomers of lignin increased the rates of change of biomass pyrolysis products with the lignin mass fraction at 400***,when the pyrolysis temperature increased to 750C,all types of lignin phenol monomers increased the rates of change of the biomass pyrolysis *** results provide new insights that have implications for the development of pyrolysis techniques for the resource recycling of various types of biomass for the preparation of high-grade gaseous and liquid fuels.

关键词： Natural biomass Pyrolysis Lignin monomers Holocellulose Original interaction

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

Changes of composition and antibiotic resistance of fecal coliform bacteria in municipal wastewater treatment plant

引用

Journal of environmental Sciences 2024年第12期146卷 241-250页

作者： Luoyao Wen Yunwei Cui Luodong Huang Chunzhong Wei Gangan Wang Junya Zhang Yanbo Jiang Yuansong Wei Peihong Shen State Key Joint Laboratory of environmental Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China College of Life Science and Technology Guangxi UniversityNanning 530005China Nanning Engineering&Technology research Center for Water Safety Guangxi Beitou Environmental Protection&Water Group Co.LTD.Nanning 530025China Department of Isotope Biogeochemistry Helmholtz Centre for Environmental Research–UFZLeipzig 04318Germany University of Chinese academy of Sciences Beijing 100049China International Graduate School at Shenzhen Tsinghua UniversityShenzhen 518055China

The dynamics of the composition and antibiotic resistance of the fecal coliform bacteria(FCB)in a typical wastewater treatment plant(WWTP)were investigated concerning the seasonal *** showed that WWTP could remove the FCB concentration by 3∼5 logs within the effluent of 10^(4)∼10^(5)CFU/L,but the antibiotic resistant rate of FCB species increased significantly after *** dominant FCB changed from Escherichia coli in the influent(∼73.0%)to Klebsiella pneumoniae in the effluent(∼53.3%)after WWTP,where the Escherichia coli was removed the most,while Klebsiella pneumoniae was the most *** secondary tank removed the most of FCB(by 3∼4 logs)compared to other processes,but increased all the concerned antibiotic resistant *** potential super bugs of FCB community showing resistance to all the target antibiotics were selected in the biological treatment unit of *** FCB showed the highest multiple antibiotic resistance(92.9%)in total which even increased to 100%in the *** has the highest antibiotic resistant rate in FCB,with a multiple antibiotic resistance rate of 98.4%.These indicated that the Klebsiella pneumoniae not just Escherichia coli should be specially emphasized after WWTP concerning the health risk associated with FCB community.

关键词： Fecal coliform bacteria Antibiotic resistance Wastewater treatment plant Antibiotic resistant bacteria Multiple antibiotic resistance

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

Nitrogen removal from summer to winter in a field pilot-scale multistage constructed wetland-pond system

引用

Journal of environmental Sciences 2022年第1期34卷 249-262页

作者： Tao Wang Liping Xiao Hongbin Lu Shaoyong Lu Jiaxin Li Xiaochun Guo Xiaoliang Zhao National Engineering Laboratory for Lake Pollution Control and Ecological Restoration State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu(SEPSORSLD)State Environmental Protection Key Laboratory for Lake Pollution ControlState Key Laboratory of Environmental Criteria and Risk AssessmentChinese Research Academy of Environmental SciencesBeijing 100012China School of environmental and Municipal Engineering Qingdao University of TechnologyQingdao 266033China College of environmental Science and Engineering Liaoning Technical UniversityFuxin 123000China College of Water Sciences Beijing Normal UniversityBeying 100875China

A pilot-scale multistage constructed wetland-pond(MCWP)system with a"pre-ecological oxidation pond,two-stage horizontal subsurface flow constructed wetland(HSCW)and surface flow constructed wetland(SFCW)as the core and postsubmerged plant pond"as the process was used to treat actual polluted river water in the field,and the variation in nitrogen removal from summer to winter was *** results showed that the average total nitrogen(TN)removal efficiency in the MCWP was approximately 40.74%.The significant positive correlation between the daily highest temperature and the TN removal efficiency of the whole system was fitted with a nonlinear curve(R^(2)=0.7192).The TN removal load rate in the HSCWs was 2.7–3.7 times that in the *** SFCW,which had high-density plants(35 plants/m^(2)),increased the proportion of nitrogen removed by plant harvesting and microbial *** TN transformed by Iris pseudacorus *** for 54.53%in the ***,bacteria completed the nitrogen cycle in the SFCW through a variety of nitrogen removal *** research not only investigated the TN removal performance in an MCWP system but also made it possible to predict the TN removal efficiency according to the daily highest temperature from summer to winter in the field.

关键词： Multistage constructed wetland-pond Total nitrogen Air temperature change Emergent plants Polluted surface water

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

Identifying factors that influence soil heavy metals by using categorical regression analysis:A case study in Beijing,China

引用

Frontiers of environmental Science & Engineering 2020年第3期14卷 1-14页

作者： Jun Yang Jingyun Wang Pengwei Qiao Yuanming Zheng Junxing Yang Tongbin Chen Mei Lei Xiaoming Wan Xiaoyong Zhou Center for environmental Remediation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese academy of Sciences Beijing 100049China research Center for Eco-environmental Sciences Chinese Academy of SciencesBeijing 100085China Beijing Key Laboratory of Remediation of Industrial Pollution Sites Environmental Protection Research Institute of Light IndustryBeijing 100048China

Identifying the factors that influence the heavy metal contents of soil could reveal the sources of soil heavy metal *** this study,a categorical regression was used to identify the factors that influence soil heavy ***,environmental factors were associated with soil heavy metal data,and then,the degree of influence of different factors on the soil heavy metal contents in Beijing was analyzed using a categorical *** results showed that the soil parent material,soil type,land use type,and industrial activity were the main influencing factors,which suggested that these four factors were important sources of soil heavy metals in *** addition,population density had a certain influence on the soil Pb and Zn *** distribution of soil As,Cd,Pb,and Zn was markedly influenced by interactions,such as traffic activity and land use type,industrial activity and population *** spatial distribution of soil heavy metal hotspots corresponded well with the influencing factors,such as industrial activity,population density,and soil parent *** this study,the main factors affecting soil heavy metals were identified,and the degree of their influence was ranked.A categorical regression represents a suitable method for identifying the factors that influence soil heavy metal contents and could be used to study the genetic process of regional soil heavy metal pollution.

关键词： Soil Heavy metal Influencing factor Categorical regression Identification method

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

Effects of urbanization on heavy metal accumulation in surface soils, Beijing

引用

Journal of environmental Sciences 2018年第2期30卷 328-334页

作者： Meie Wang Rui Liu Weiping Chen Chi Peng Bernd Markert State Key Laboratory of Urban and Regional Ecology Research Centre for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China environmental Institute of scientific Networks 49733 Haren Germany

Urbanization processes affect the accumulation of heavy metals in urban soils. Effects of urbanization on heavy metal accumulation in soils were studied using Beijing as an example. It has been suggested that the ecological function of vegetation covers shifting from natural to agricultural settings and then to urban greenbelts could increase the zinc（Zn） concentrations of soils successively. The Zn concentration of urban soils was significantly correlated to the percentage of the impervious land surface at the500 m × 500 m spatial scale. For urban parks, the age or years since the development accounted for 80% of the variances of cadmium（Cd） and Zn in soils. The population density,however, did not affect the heavy metal distributions in urban soils. To conclude, the urban age turned out to be a notable factor in quantifying heavy metal accumulation in urban soils.

关键词： Urban soils Human disturbance Zn Impervious land Population density

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

Prediction of Gas Chromatographic Retention Indices of Organophosphates by DFT and VSMP Method

引用

Chinese Journal of Structural Chemistry 2012年第5期31卷 704-712页

作者：刘红艳莫凌云李艳红易忠胜 College of Chemistry and Bioengineering Guilin University of Technology guangxi Key Laboratory of environmental Engineering Protection and AssessmentInstitute of Technology

Polychlorinated dibenzothiophenes（PCDTs） are a group of important persistent organic *** the present study,geometrical optimization and electrostatic potential calculations have been performed for all 135 PCDTs congeners at the B3LYP/6-31G＊ level of *** means of the VSMP（variable selection and modeling based on prediction） program,one optimal descriptor（molecular polarizability,α） was selected to develop a QSRR model for the prediction of gas chromatographic retention indices（GC-RI） of *** estimated correlation coefficients（r2） and LOO-validated correlation coefficients（q2）,all more than 0.99,were built by multiple linear regression,which shows a good estimation ability and stability of the models.A prediction power for the external samples was validated by the model built from the training set with 17 polychlorinated dibenzothiophenes.

关键词： polychlorinated dibenzothiophenes(PCDTs) retention indices(RI) density functional theory(DFT) variable selection and modeling based on prediction(VSMP) quantitative structure-retention relationship(QSRR)

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

Variations in diet composition of sympatric Trachypithecus francoisi and Macaca assamensis in the limestone habitats of Nonggang, China

引用

Zoological research 2018年第4期39卷 284-290页

作者： Qi-Hai Zhou Zhong-Hao Huang Hua Wei Cheng-Ming Huang Key Laboratory of Ecology of Rare and Endangered Species and environmental protection Ministry of Education guangxi Key Laboratory of Rare and Endangered Animal Ecology Guangxi Normal University Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences

Comparative studies of sympatric species are essential for understanding behavioral and ecological adaptation as well as the mechanisms that can reduce resource competition to allow coexistence. Francois＇ langurs （Trachypithecus francoisi） and Assamese macaques （Macaca assamensis） are sympatric primate species found in the limestone seasonal rainforests of Nonggang Nature Reserve, southwestern guangxi, China. To explore their different adaptation strategies, we collected data on diet using scan sampling at 15-min intervals. Our results revealed that Francois＇ langurs showed a more flexible diet composition than Assamese macaques Francois＇ langurs increased dietary diversity and mature leaf consumption in response to seasonal scarcity of preferred young leaves and fruits, whereas Assamese macaques relied heavily on young bamboo leaves （Indocalamus calcicolus） in most months These variations reflect the differences in digestive physiology, morphology, and the temporal and spatial distribution of food resources.

关键词： Francois' iangurs Assamese macaques Diet composition Limestone habitat

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

Can phosphate compounds be used to reduce the plant uptake of Pb and resist the Pb stress in Pb-contaminated soils?

引用

Journal of environmental Sciences 2009年第3期21卷 360-365页

作者： CHEN Shibao CHEN Li MA Yibing HUANG Yizong Ministry of Agriculture Key Laboratory of Plant Nutrition and Nutrient Cycling and Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing 100081 China Institute of Plant protection and environmental protection Beijing Academy of Agricultural and Forestry Science Beijing 100097 China research Center for Eco-environmental Sciences Chinese Academy of Sciences Beijing 100085 China

The effects of different phosphate-amendments on lead （Pb） uptake, the activities of superoxide dismutase （SOD） and the level of malondialdehyde （MDA） in cauliflower （Brassica oleracea L.） in contaminated soils with 2500, or 5000 mg P2O5/kg soil of hydroxyapatite （HA）, phosphate rock （PR）, single-superphosphate （SSP） and the mix of HA/SSP （HASSP） were evaluated in pot experiments. Results showed that the Pb concentrations in shoots and roots decreased by 18.3%-51.6% and 16.8%-57.3% among the treatments respectively compared to the control samples. The efficiency order of these phosphate-amendments in reducing Pb uptake was as follows： HASSP= HA 〉 SSP ,= PR. With the addition of SSP, HA and the mix of HA/SSP, the SOD activity in shoot was reduced markedly （P 〈 0.05） compared with that in the control group. For example, the SOD activities in shoot by the treatments of HASSP, SSP, and HA in 5000 mg P2O5/kg were found to be only 51.3%, 56.2%, and 56.7%, respectively. Similar effects were also observed on the level of MDA in the shoots with a decrease in 24.5%-56.3%. The results verified the inference that phosphate compounds could be used to reduce the plant uptake of Pb and resist the Pb stress in the plant vegetated in Pb-contaminated soils.

关键词： phosphate amendments lead superoxide dismutase (SOD) malondialdehyde (MDA) contaminated soil

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

Preliminary analysis of species sensitivity distribution based on gene expression effect

引用

Science China Earth Sciences 2012年第6期55卷 907-913页

作者： YAN ZhenGuang YANG NiYun WANG XiaoNan WANG WanHua MENG ShuangShuang LIU ZhengTao State Key Laboratory of environmental Criteria and Risk Assessment State environmental protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals Chinese Research Academy of Environmental Sciences Beijing 100012 China

Species sensitivity analysis is one of the major techniques applied to derive water quality criteria. Presently, the toxicity data used for development of water quality criteria are mainly in the biological individual level. With the increase of ecotoxicogenomics toxicity data, it is worth studying whether the gene expression effect data can be used to derive water quality criteria. Taking cadmium, copper and zinc as examples, we analyzed the toxic effects of the three heavy metals by constructing the species sensitivity distribution curves on the basis of extensive toxicity data. The results showed that the rank of species sensitivity for the acute, chronic and gene expression effect toxicity data of cadmium is "chronic>gene>acute". Although the gene expression effect data of copper and zinc are insufficient, the trend of data sensitivity of zinc is similar to cadmium. However, the trend of species sensitivity of copper is different from that of cadmium and zinc with higher sensitivity of gene expression data. It suggested that though the existing data of gene expression effects are not sufficient enough, they have the potential to be used in the development of chronic water quality criteria. For application in the derivation of water quality criteria, illogical test concentration design and insufficient target genes are two main weaknesses in the study of gene expression effects.

关键词： water quality criteria heavy metal gene expression effect species sensitivity distribution data analysis

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：