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  1. Article ; Online: Enhancement of nitrate reduction in microbial fuel cells by acclimating biocathode potential: Performance, microbial community, and mechanism.

    Yao, Jiachao / Qi, Jiayi / Sun, Jiamo / Qian, Xiaofei / Chen, Jun

    Bioresource technology

    2024  Volume 398, Page(s) 130522

    Abstract: The enhancement of nitrate reduction in microbial fuel cells (MFCs) by acclimating biocathode potential was studied. An MFC system was started up, and measured by cyclic voltammetry to determine a suitable potential region for acclimating biocathode. The ...

    Abstract The enhancement of nitrate reduction in microbial fuel cells (MFCs) by acclimating biocathode potential was studied. An MFC system was started up, and measured by cyclic voltammetry to determine a suitable potential region for acclimating biocathode. The experimental results revealed that potential acclimation could efficiently improve denitrification performance by relieving the phenomenon of nitrite accumulation, and optimum performance was obtained at -0.4 V with a total nitrogen removal efficiency of 87.4 %. Subsequently, the characteristics of electron transfer behaviors were measured, suggesting that a positive correlation between nitrate reduction and the contribution of direct electron transfer emerged. Furthermore, a denitrification mechanism was proposed. The results indicated that potential acclimation was conducive to enhancing denitrifying enzyme activity and that the electron transport system activity could be increased by 5.8 times. This study provides insight into the electron transfer characteristics and denitrification mechanisms in MFCs for nitrate reduction at specific acclimatization potentials.
    MeSH term(s) Nitrates ; Bioelectric Energy Sources ; Nitrites ; Microbiota ; Acclimatization ; Nitrogen ; Denitrification ; Electrodes ; Bioreactors
    Chemical Substances Nitrates ; Nitrites ; Nitrogen (N762921K75)
    Language English
    Publishing date 2024-03-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2024.130522
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 3258: Show issues

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  2. Article: tert-Butoxide mediated cascade desulfonylation/arylation/hydrolysis of cyclic sulfonyimines using diaryliodonium salts: synthesis of diaryl ether derivatives bearing a 2-aldehyde group

    Qian, Xiaofei / Han, Jianwei / Wang, Limin

    RSC advances. 2016 Sept. 19, v. 6, no. 92

    2016  

    Abstract: Cascades of cyclic sulfonyimines mediated by tBuOK with diaryliodonium salts has been developed, giving the diaryl ethers in good yields. Furthermore, bulky ortho-substituted diaryl ethers with an aldehyde group can be obtained easily in comparision with ...

    Abstract Cascades of cyclic sulfonyimines mediated by tBuOK with diaryliodonium salts has been developed, giving the diaryl ethers in good yields. Furthermore, bulky ortho-substituted diaryl ethers with an aldehyde group can be obtained easily in comparision with metal-catalyzed protocols.
    Keywords aldehydes ; arylation ; chemical derivatives ; ethers ; hydrolysis ; salts
    Language English
    Dates of publication 2016-0919
    Size p. 89234-89237.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c6ra19313g
    Database NAL-Catalogue (AGRICOLA)

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  3. Article: Copper-catalyzed selective ortho-arylations of 2-naphthol and phenol derivatives with diaryliodonium salts

    Qian, Xiaofei / Jianwei Han / Limin Wang

    Tetrahedron letters. 2016 Feb. 03, v. 57

    2016  

    Abstract: The selective arylations of 2-naphthol and phenol derivatives catalyzed by Cu(OTf)2 with using diaryliodonium(III) salts have been developed. With this method, biaryls bearing hydroxyl groups can be easily accessed in moderate to good yields. ... ...

    Abstract The selective arylations of 2-naphthol and phenol derivatives catalyzed by Cu(OTf)2 with using diaryliodonium(III) salts have been developed. With this method, biaryls bearing hydroxyl groups can be easily accessed in moderate to good yields. Additionally, this protocol provided an alternative for the preparation of 3-arylated binaphthalene derivatives.
    Keywords 2-naphthol ; chemical reactions ; chemical structure ; copper ; phenol ; salts
    Language English
    Dates of publication 2016-0203
    Size p. 607-610.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 204287-3
    ISSN 1873-3581 ; 0040-4039
    ISSN (online) 1873-3581
    ISSN 0040-4039
    DOI 10.1016/j.tetlet.2015.12.100
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2837: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  4. Article: Potassium tert-Butoxide Mediated Arylation of 2-Substituted Malononitriles Using Diaryliodonium Salts

    Han, Jianwei / Qian, Xiaofei / Xu, Bowen / Wang, Limin

    Synlett

    2017  Volume 28, Issue 16, Page(s) 2139–2142

    Abstract: Direct arylation of 2-substituted malononitriles using diaryliodonium salts without involving transition-metal catalysts was developed. By using potassium tert -butoxide as a promoter, the desired 2-substituated α-arylmalononitriles derivatives were ... ...

    Abstract Direct arylation of 2-substituted malononitriles using diaryliodonium salts without involving transition-metal catalysts was developed. By using potassium tert -butoxide as a promoter, the desired 2-substituated α-arylmalononitriles derivatives were synthesized in good to excellent yields of 55–96%. This synthetic method provided an efficient way to prepare a variety of 2-substituted arylmalononitriles which were useful in agrochemicals.
    Keywords arylation ; diaryliodonium salts ; metal-free ; arylmalononitriles ; agrochemicals
    Language English
    Publishing date 2017-07-06
    Publisher © Georg Thieme Verlag
    Publishing place Stuttgart ; New York
    Document type Article
    ZDB-ID 2042012-2
    ISSN 1437-2096 ; 0936-5214
    ISSN (online) 1437-2096
    ISSN 0936-5214
    DOI 10.1055/s-0036-1589061
    Database Thieme publisher's database

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  5. Article: A game-theoretic analysis of information security investment for multiple firms in a network

    Qian, Xiaofei / Liu, Lin / Liu, Xinbao / Pardalos, Panos M / Pei, Jun

    Journal of the Operational Research Society : OR Vol. 68, No. 10 , p. 1290-1305

    2017  Volume 68, Issue 10, Page(s) 1290–1305

    Author's details Xiaofei Qian, Xinbao Liu, Jun Pei, Panos M. Pardalos and Lin Liu
    Keywords IoT ; information security investment ; multiple-step propagation ; Nash equilibrium ; optimal solution
    Language English
    Publisher Palgrave
    Publishing place Basingstoke, Hampshire
    Document type Article
    ZDB-ID 716033-1 ; 2069025-3
    ISSN 0030-3623 ; 1473-2858 ; 1473-284X
    ISSN 0030-3623 ; 1473-2858 ; 1473-284X
    Database ECONomics Information System

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  6. Article ; Online: AlCl

    Hu, Chen / Hong, Gang / Qian, Xiaofei / Kim, Kwang Rim / Zhu, Xiaoyan / Wang, Limin

    Organic & biomolecular chemistry

    2017  Volume 15, Issue 23, Page(s) 4984–4991

    Abstract: A new cross-coupling reaction of N-benzylic sulfonamides with 2-substituted cyanoacetates for the synthesis of 2-substituted benzylbenzene was reported. In the presence of ... ...

    Abstract A new cross-coupling reaction of N-benzylic sulfonamides with 2-substituted cyanoacetates for the synthesis of 2-substituted benzylbenzene was reported. In the presence of AlCl
    Language English
    Publishing date 2017-06-14
    Publishing country England
    Document type Journal Article
    ZDB-ID 2097583-1
    ISSN 1477-0539 ; 1477-0520
    ISSN (online) 1477-0539
    ISSN 1477-0520
    DOI 10.1039/c7ob01025g
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Base promoted direct C4-arylation of 4-substituted-pyrazolin-5-ones with diaryliodonium salts

    Mao, Song / Geng, Xu / Han, Jianwei / Qian, Xiaofei / Wang, Limin / Wu, Shengying / Yang, Yang

    RSC advances. 2015 Apr. 21, v. 5, no. 46

    2015  

    Abstract: A metal-free approach for the C4-arylation of 4-substituted-pyrazolin-5-ones with diaryliodonium salts was developed. The reaction proceeded smoothly at room temperature in the presence of DMAP (4-dimethylaminopyridine). As a result, a wide range of ... ...

    Abstract A metal-free approach for the C4-arylation of 4-substituted-pyrazolin-5-ones with diaryliodonium salts was developed. The reaction proceeded smoothly at room temperature in the presence of DMAP (4-dimethylaminopyridine). As a result, a wide range of desired multi-substituted pyrazolin-5-one derivatives were obtained in good to excellent yields (20–98%).
    Keywords ambient temperature ; arylation ; salts
    Language English
    Dates of publication 2015-0421
    Size p. 36390-36393.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c5ra03819g
    Database NAL-Catalogue (AGRICOLA)

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