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Institution

Nankai University

EducationTianjin, China
About: Nankai University is a education organization based out in Tianjin, China. It is known for research contribution in the topics: Catalysis & Enantioselective synthesis. The organization has 42964 authors who have published 51866 publications receiving 1127896 citations. The organization is also known as: Nánkāi Dàxué.


Papers
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Journal ArticleDOI
TL;DR: Extracellular DNA in sediment is a major ARG reservoir that could facilitate antibiotic resistance propagation, and chromosomally encoded 16S rRNA genes were undetectable after 8 weeks, suggesting higher persistence of plasmid-borne ARGs in river sediment.
Abstract: The propagation of antibiotic resistance genes (ARGs) represents a global threat to both human health and food security. Assessment of ARG reservoirs and persistence is therefore critical for devising and evaluating strategies to mitigate ARG propagation. This study developed a novel, internal standard method to extract extracellular DNA (eDNA) and intracellular DNA (iDNA) from water and sediments, and applied it to determine the partitioning of ARGs in the Haihe River basin in China, which drains an area of intensive antibiotic use. The concentration of eDNA was higher than iDNA in sediment samples, likely due to the enhanced persistence of eDNA when associated with clay particles and organic matter. Concentrations of sul1, sul2, tetW, and tetT antibiotic resistance genes were significantly higher in sediment than in water, and were present at higher concentrations as eDNA than as iDNA in sediment. Whereas ARGs (frequently located on plasmid DNA) were detected for over 20 weeks, chromosomally encoded 16S rRNA genes were undetectable after 8 weeks, suggesting higher persistence of plasmid-borne ARGs in river sediment. Transformation of indigenous bacteria with added extracellular ARG (i.e., kanamycin resistance genes) was also observed. Therefore, this study shows that extracellular DNA in sediment is a major ARG reservoir that could facilitate antibiotic resistance propagation.

325 citations

Journal ArticleDOI

325 citations

Journal ArticleDOI
TL;DR: In this article, a new protocol for the Biginelli reaction was proposed, which produces excellent yields, allows the recycling of catalyst with no loss in its activity, and leads to zero-discharge during the process.

325 citations

Journal ArticleDOI
Wenchao Duan1, Zhiqiang Zhu1, Hao Li1, Zhe Hu1, Kai Zhang1, Fangyi Cheng1, Jun Chen1 
TL;DR: In this paper, a NVP@C core-shell nanocomposite has been synthesized through a hydrothermal assisted sol-gel method, where ascorbic acid and polyethylene glycol 400 (PEG-400) were synergistically used to control the particle growth and provide the surface coating of conductive carbon.
Abstract: Na3V2(PO4)3 (NVP) is an attractive cathode material for sodium ion batteries due to its high theoretical energy density and stable three-dimensional (3D) NASICON structure. In this paper, a NVP@C core–shell nanocomposite has been synthesized through a hydrothermal assisted sol–gel method. Ascorbic acid and polyethylene glycol 400 (PEG-400) were synergistically used to control the particle growth and provide the surface coating of conductive carbon. The as-prepared nanocomposite was composed of a nanosized Na3V2(PO4)3 core with a typical size of ∼40 nm and a uniformly amorphous carbon shell with the thickness of a few nanometers. The electrode performance of the NVP@C core–shell nanocomposite as cathode for sodium ion batteries is investigated and compared with that of bare NVP and NVP/C. Among the samples examined, the NVP@C nanocomposite showed the best cycle life and rate capability. It rendered an initial capacity of 104.3 mA h g−1 at 0.5 C and 94.9 mA h g−1 at 5 C with a remarkable capacity retention of 96.1% after 700 cycles. Moreover, a full cell using the as-prepared nanocomposite as both the cathode and the anode active material has been successfully built, showing a reversible capacity of 90.9 mA h g−1 at 2 C with an output voltage of about 1.7 V and a specific energy density of about 154.5 W h kg−1. The enhanced electrode performance is attributed to the combination of particle downsizing and carbon coating, which can favor the migration of both electrons and ions.

323 citations

Journal ArticleDOI
TL;DR: In this article, a case study of the Tianjin Economic-Technological Development Area (TEDA) is used as a backdrop to assess how TEDA has transformed itself into one of the top three national eco-industrial parks in China.

322 citations


Authors

Showing all 43397 results

NameH-indexPapersCitations
Yi Chen2174342293080
Peidong Yang183562144351
Jie Zhang1784857221720
Yang Yang1712644153049
Qiang Zhang1611137100950
Bin Liu138218187085
Jun Chen136185677368
Hui Li1352982105903
Jie Liu131153168891
Han Zhang13097058863
Jian Zhou128300791402
Chao Zhang127311984711
Wei Chen122194689460
Xuan Zhang119153065398
Yang Li117131963111
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2023186
2022925
20215,270
20204,645
20194,261
20183,520