Results 1 to 10 of about 5,414,012 (318)

Assessing limitation factors and thresholds for macroinvertebrate communities in response to land use gradients [PDF]

E3S Web of Conferences, 2021
Transformations of land use from natural to anthropic type have been recognized as a significant trigger which degenerate the aquatic ecological quality seriously.
Ding Sen, Li Feilong, Lin Jianing, Zhang Yuan, Jia Xiaobo   +4 more
doaj   +1 more source

Analysis of Specific Perfluorohexane Sulfonate Isomers by Liquid Chromatography-Tandem Mass Spectrometry: Method Development and Application in Source Apportionment

Journal of Analytical Methods in Chemistry, 2022
Characterization of perfluorohexane sulfonate (PFHxS) isomers, a chemical proposed for listing under the Stockholm Convention, is important to elucidate its environmental behaviors and sources. Optimized chromatographic separation coupled with monitoring
Liping Yang, Xin Chen, Lingyan Zhu, Yixin Wang, Guoqiang Shan   +4 more
doaj   +1 more source

Precolumn Derivatization High-Performance Liquid Chromatography for Determination of Perfluorocarboxylic Acids in Catalytic Degradation Solutions

International Journal of Analytical Chemistry, 2022
Perfluoroalkyl carboxylic acids (PFCAs), a series of ubiquitous contaminants in the global environment, attracted much attention due to their potential for high bioaccumulation and toxicity to various organisms. There are a lot of measurement requests in
Liping Yang, Binbin Sun, Haochen Cui, Lingyan Zhu, Guoqiang Shan   +4 more
doaj   +1 more source

Distribution, health risk assessment, and water quality criteria of phthalate esters in Poyang Lake, China

Environmental Sciences Europe, 2023
Although China has been the main manufacturer and consumer of phthalate esters (PAEs), human health ambient water quality criteria (AWQCs) have not been proposed for these chemicals.
Shunhao Ai, Xiaonan Wang, Xiangyun Gao, Qianyun Xu, Ji Li, Zhengtao Liu   +5 more
doaj   +1 more source

eDNA metabarcoding as a promising conservation tool to monitor fish diversity in Beijing water systems compared with ground cages

Scientific Reports, 2022
Fish diversity, an important indicator of the health of aquatic ecosystems, is declining sharply due to water pollution, overfishing, climate change, and species invasion.
Mei Shen, Nengwen Xiao, Ziyi Zhao, Ningning Guo, Zunlan Luo, Guang Sun, Junsheng Li   +6 more
doaj   +1 more source

Study on Ecological Security Evaluation Index System of the Yellow River Basin [PDF]

E3S Web of Conferences, 2023
As an important energy base and ecological barrier in China, the ecological security of the Yellow River Basin has a very important strategic position in the pattern of high-quality development, but it is threatened by human activities and climate change.
Tian Yuxin, Tian Meirong, Feng Chaoyang, Niu Xitong, Liu Mengfei   +4 more
doaj   +1 more source

Enhanced phenol removal by permanganate with biogas residue biochar: catalytic role of in-situ formation of manganese dioxide and activation of biochar

Biochar, 2023
Increased biogas residue related to the rapid development of anaerobic fermentation has become an urgent environmental problem. The pyrolysis of biogas residue into biochar is one of the most promising treatments.
Dongyang Li, Yi Xiao, Beidou Xi, Tiancheng Gong, Ting Zhang, Nannan Huang, Wenxuan Li, Tianxue Yang   +7 more
doaj   +1 more source

Research advances on the influence of typical geochemical and hydrogeological characteristics on the natural attenuation of pollutants

地质科技通报, 2023
As an effective risk prevention and control tool for contaminated sites, Monitoring Natural Attenuation (MNA) has been applied worldwide. The core of this technology is to determine the ability and efficiency of pollutant attenuation, which are ...
Meng Zhao, Yonghai Jiang, Fan Feng, Yongfeng Jia, Xinying Lian, Changjian Shang, Yongge Zang   +6 more
doaj   +1 more source

“Criteria of Hybridity” [PDF]

Nature, 1947
THE importance of the study of natural hybridization is obvious in view of the large part it plays in the process of evolution. There have been considerable differences of opinion, first as to the possibility of recognizing natural hybrids and, secondly, as to the status of the parents once the possibility of hybridization has been established.
openaire   +2 more sources

The criteria of “inoperability”

Monaldi Archives for Chest Disease, 2017
<p>In the literature, the term “inoperable” mainly refers to two specific clinical aspects: cancer staging and technical difficulty/impossibility in performing. In light of this clarification, the statement “the patient cannot be anesthetized” has no medical foundation.
Romagnoli S., PAPARELLA, LAURA, Boninsegni P.   +2 more
openaire   +4 more sources