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Your search keyword '"Duan, Lijie"' showing total 431 results
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431 results on '"Duan, Lijie"'

21. Predatory Bdellovibrio-and-like organism mixtures on efficient MBR in-situ membrane fouling diminishment and mechanisms.

Author

Dong, Xiaona, Duan, Lijie, Zhan, Manjun, Xu, Yi, and Yu, Ran

Subjects
MIXED culture (Microbiology), MICROBIAL products, MEMBRANE separation, FOULING, FLAVOBACTERIUM
Abstract

Membrane fouling is a major hindrance that restricts the application of membrane bioreactors (MBRs). Bdellovibrio-and-like organisms (BALOs), as obligatory parasitic bacteria, prey upon various bacteria. In this study, the BALO mixtures were screened and found more effective in membrane fouling mitigation compared to the single BALO species and extended the membrane filtration period by as long as 33.3%. The higher BALO diversity reduced the potential foulants generation in the activated sludge by decreasing the sludge viscosity as high as 13.8 ± 0.6% than the pure culture of BALO. Meanwhile, the mixed BALOs demonstrated superior biofilm predation capabilities, with the content of soluble microbial products and extracellular polymeric substances on the biofilm decreasing by 26.1 ± 0.5% and 38.3 ± 0.2% as the most compared to the single BALO species involved system. Additionally, the BALO mixtures expanded the single strains' host lysis spectrum of both the activated sludge and biofilm. The abundance of membrane-fouling-related bacteria such as Flavobacterium, Rhodobacter, and Labilithrix and pioneer bacteria such as Sphingorhabdus and Pseudomonas was significantly reduced. In summary, this study disclosed the significantly better membrane fouling mitigation effects of the BALOs with higher diversity, suggesting that the expansion of the host range is crucial for the further application of BALOs to enhance the anti-fouling performance of the MBR system. [ABSTRACT FROM AUTHOR]

Published
2025
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23. Initial productive and latent HIV infections originate in vivo by infection of resting T cells

Author

Wietgrefe, Stephen W., Anderson, Jodi, Duan, Lijie, Southern, Peter J., Zuck, Paul, Wu, Guoxin, Howell, Bonnie J., Reilly, Cavan, Kroon, Eugene, Chottanapund, Suthat, Buranapraditkun, Supranee, Sacdalan, Carlo, Tulmethakaan, Nicha, Colby, Donn J., Chomchey, Nitiya, Prueksakaew, Peeriya, Pinyakorn, Suteeraporn, Trichavaroj, Rapee, Mitchell, Julie L., Trautmann, Lydie, Hsu, Denise, Vasan, Sandhya, Manasnayakorn, Sopark, de Souza, Mark, Tovanabutra, Sodsai, Schuetz, Alexandra, Robb, Merlin L., Phanuphak, Nittaya, Ananworanich, Jintanat, Schacker, Timothy W., and Haase, Ashley T.

Subjects
Care and treatment, Patient outcomes, Health aspects, HIV -- Care and treatment -- Patient outcomes, T cells -- Health aspects, HIV (Viruses) -- Care and treatment -- Patient outcomes
Abstract

Introduction From the beginning of HIV research, HIV has been mainly propagated in vitro in tissue cultures of activated [CD4.sup.+] T cells (1), leading to the prevailing view that activated [...], Productively infected cells are generally thought to arise from HIV infection of activated [CD4.sup.+] T cells, and these infected activated cells are thought to be a recurring source of latently infected cells when a portion of the population transitions to a resting state. We discovered and report here that productively and latently infected cells can instead originate from direct infection of resting [CD4.sup.+] T cell populations in lymphoid tissues in Fiebig I, the earliest stage of detectable HIV infection. We found that direct infection of resting [CD4.sup.+] T cells was correlated with the availability of susceptible target cells in lymphoid tissues largely restricted to resting [CD4.sup.+] T cells in which expression of pTEFb enabled productive infection, and we documented persistence of HIV-producing resting T cells during antiretroviral therapy (ART). Thus, we provide evidence of a mechanism by which direct infection of resting T cells in lymphoid tissues to generate productively and latently infected cells creates a mechanism by which the productively infected cells can replenish both populations and maintain two sources of virus from which HIV infection can rebound, even if ART is instituted at the earliest stage of detectable infection.

Published
2023
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33. Curcumin-loaded polyvinyl butyral film with antibacterial activity

Author

Qiao Yanchao and Duan Lijie

Subjects
curcumin, polyvinyl butyral, film, antibacterial activity, Polymers and polymer manufacture, TP1080-1185
Abstract

Antibacterial materials have found widespread interest in different fields nowadays. In this study, curcumin (Cur) was incorporated into the polyvinyl butyral (PVB) matrix by dissolving in ethanol for improving the functional properties of a pure PVB film. We found that Cur was uniformly dispersed in the PVB matrix, which showed good compatibility. Moreover, the incorporation of Cur could also improve thermal stability, hydrophilicity, and mechanical property. The UV-vis spectra of the PVB–Cur film demonstrated that the film could block ultraviolet radiation. Subsequently, the antibacterial activity of the PVB–Cur film was measured by the colony-counting method against S. aureus and E. coli. The results showed that the PVB–Cur film exhibited good antibacterial activity. Therefore, the PVB–Cur film was considered as a promising material for food and medical packaging applications.

Published
2020
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