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  1. Article ; Online: Uncertainty quantification of receptor ligand binding sites prediction.

    Chen, Nanjie / Yu, Dongliang / Beglov, Dmitri / Kon, Mark / Castrillon-Candas, Julio Enrique

    ArXiv

    2024  

    Abstract: Recent advancements in protein docking site prediction have highlighted the limitations of traditional rigid docking algorithms, like PIPER, which often neglect critical stochastic elements such as solvent-induced fluctuations. These oversights can lead ... ...

    Abstract Recent advancements in protein docking site prediction have highlighted the limitations of traditional rigid docking algorithms, like PIPER, which often neglect critical stochastic elements such as solvent-induced fluctuations. These oversights can lead to inaccuracies in identifying viable docking sites due to the complexity of high-dimensional, stochastic energy manifolds with low regularity. To address this issue, our research introduces a novel model where the molecular shapes of ligands and receptors are represented using multi-variate Karhunen-Lo `eve (KL) expansions. This method effectively captures the stochastic nature of energy manifolds, allowing for a more accurate representation of molecular interactions.Developed as a plugin for PIPER, our scientific computing software enhances the platform, delivering robust uncertainty measures for the energy manifolds of ranked binding sites. Our results demonstrate that top-ranked binding sites, characterized by lower uncertainty in the stochastic energy manifold, align closely with actual docking sites. Conversely, sites with higher uncertainty correlate with less optimal docking positions. This distinction not only validates our approach but also sets a new standard in protein docking predictions, offering substantial implications for future molecular interaction research and drug development.
    Language English
    Publishing date 2024-01-23
    Publishing country United States
    Document type Preprint
    ISSN 2331-8422
    ISSN (online) 2331-8422
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Preparation of Sulfonated Poly(arylene ether)/SiO

    Ye, Zhoulin / Chen, Nanjie / Zheng, Zigui / Xiong, Lei / Chen, Dongyang

    Molecules (Basel, Switzerland)

    2023  Volume 28, Issue 7

    Abstract: Proton exchange membranes (PEMs) are an important type of vanadium redox flow battery (VRFB) separator that play the key role of separating positive and negative electrolytes while transporting protons. In order to lower the vanadium ion permeability and ...

    Abstract Proton exchange membranes (PEMs) are an important type of vanadium redox flow battery (VRFB) separator that play the key role of separating positive and negative electrolytes while transporting protons. In order to lower the vanadium ion permeability and improve the proton selectivity of PEMs for enhancing the Coulombic efficiency of VRFBs, herein, various amounts of nano-sized SiO
    Language English
    Publishing date 2023-03-31
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules28073130
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Highly Soluble Dimethoxymethyl Tetrathiafulvalene with Excellent Stability for Non-Aqueous Redox Flow Batteries.

    Chen, Dongyang / Shen, Hongli / Chen, Dongchu / Chen, Nanjie / Meng, Yuezhong

    ACS applied materials & interfaces

    2023  Volume 15, Issue 26, Page(s) 31491–31501

    Abstract: Non-aqueous redox flow batteries (RFBs) are highly attractive for grid-scale energy storage applications because of their independent design of energy and power, high energy density and efficiency, easy maintenance, and potentially low cost. In order to ... ...

    Abstract Non-aqueous redox flow batteries (RFBs) are highly attractive for grid-scale energy storage applications because of their independent design of energy and power, high energy density and efficiency, easy maintenance, and potentially low cost. In order to develop active molecules with large solubility, excellent electrochemical stability, and high redox potential for a non-aqueous RFB catholyte, herein, two flexible methoxymethyl groups had been attached to a famous redox-active tetrathiafulvalene (TTF) core. The strong intermolecular packing of the rigid TTF unit was effectively depressed, leading to a dramatically improved solubility of up to 3.1 M in conventional carbonate solvents. The performance of the obtained dimethoxymethyl TTF (DMM-TTF) was studied in a semi-solid RFB system with Li foil as the counter electrode. When using porous Celgard as the separator, the hybrid RFB with 0.1 M DMM-TTF had two high discharge plateaus at 3.20 and 3.52 V and a low capacity retention of 30.7% after 100 cycles at 5 mA cm
    Language English
    Publishing date 2023-06-21
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.3c05387
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: A Memetic Algorithm for Solving the Robust Influence Maximization Problem on Complex Networks against Structural Failures.

    Huang, Delin / Tan, Xiaojun / Chen, Nanjie / Fan, Zhengping

    Sensors (Basel, Switzerland)

    2022  Volume 22, Issue 6

    Abstract: Many transport systems in the real world can be modeled as networked systems. Due to limited resources, only a few nodes can be selected as seeds in the system, whose role is to spread required information or control signals as widely as possible. This ... ...

    Abstract Many transport systems in the real world can be modeled as networked systems. Due to limited resources, only a few nodes can be selected as seeds in the system, whose role is to spread required information or control signals as widely as possible. This problem can be modeled as the influence maximization problem. Most of the existing selection strategies are based on the invariable network structure and have not touched upon the condition that the network is under structural failures. Related studies indicate that such strategies may not completely tackle complicated diffusion tasks in reality, and the robustness of the information diffusion process against perturbances is significant. To give a numerical performance criterion of seeds under structural failure, a measure has been developed to define the robust influence maximization (RIM) problem. Further, a memetic optimization algorithm (MA) which includes several problem-orientated operators to improve the search ability, termed RIMMA, has been presented to deal with the RIM problem. Experimental results on synthetic networks and real-world networks validate the effectiveness of RIMMA, its superiority over existing approaches is also shown.
    Language English
    Publishing date 2022-03-11
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s22062191
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Accelerated degradation of quaternary ammonium functionalized anion exchange membrane in catholyte of vanadium redox flow battery

    Hao, Xinxin / Chen, Nanjie / Chen, Yu / Chen, Dongyang

    Polymer degradation and stability. 2022 Mar., v. 197

    2022  

    Abstract: Anion exchange membranes (AEMs) are a type of important separators for vanadium redox flow batteries (VRFBs) with unique advantage in mitigating the permeability of vanadium ions by Donnan repulsion. So far, the degradation mechanism of quaternary ... ...

    Abstract Anion exchange membranes (AEMs) are a type of important separators for vanadium redox flow batteries (VRFBs) with unique advantage in mitigating the permeability of vanadium ions by Donnan repulsion. So far, the degradation mechanism of quaternary ammonium functionalized AEMs in acidic and oxidative VRFBs catholyte is still unclear. Herein, we report the accelerated degradation of a homemade quaternary ammonium functionalized AEM (QA-OMPFEK-20) in the catholyte of VRFBs. The experimental results show that the VO₂⁺ species in the catholyte are reduced to VO²⁺ gradually with the extension of immersion time. The ion exchange capacity (IEC) of the QA-OMPFEK-20 was decreased to 88.7% of its original value after 30 days of immersion. ¹H NMR, Fourier-transformed infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) were used to probe the changes in chemical environment of QA-OMPFEK-20. The degradation mechanism was then proposed as the critical attack of VO₂⁺ ions on the ether bond of backbone and the C-N bond of quaternary ammonium groups, leading to the decrease of both molecular weight and IEC.
    Keywords X-ray photoelectron spectroscopy ; anion exchange ; anion-exchange membranes ; batteries ; degradation ; ion exchange capacity ; molecular weight ; permeability ; polymers ; quaternary ammonium compounds ; vanadium
    Language English
    Dates of publication 2022-03
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 1502217-1
    ISSN 0141-3910
    ISSN 0141-3910
    DOI 10.1016/j.polymdegradstab.2022.109864
    Database NAL-Catalogue (AGRICOLA)

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  6. Article: Perspectives of international multi-center clinical trials on traditional Chinese herbal medicine.

    Wu, Shan / Wang, Chuanchi / Bai, Dong / Chen, Nanjie / Hu, Jingqing / Zhang, Junhua

    Frontiers in pharmacology

    2023  Volume 14, Page(s) 1195364

    Abstract: With the introduction of various subjects, such as clinical epidemiology and evidence-based medicine, the qualities and levels of Traditional Chinese Herbal Medicine (TCHM) in China improved substantially, and the processes of internationalization of ... ...

    Abstract With the introduction of various subjects, such as clinical epidemiology and evidence-based medicine, the qualities and levels of Traditional Chinese Herbal Medicine (TCHM) in China improved substantially, and the processes of internationalization of Traditional Chinese Medicine (TCM) are further accelerated. Since, a variety of drug products in China have been approved for marketing in other countries, and approximately 10 products have submitted the IND application to FDA of United States, of which various Chinese herbal preparations such as compound Danshen dripping pills, Xingling granules, and HMPL-004 have been approved to be investigated in phase III clinical trials. In general, multi-center studies of TCHM are increasing with years, but most of the studies are performed in some certain country, and the actual international multi-center clinical trials are very rare. Number of SCI literatures on multi-center clinical trials of TCHM that published in the recent decade also showed increasing tendency with years, despite the evident reduction in the past 2 years due to the influence of COVID-19 pandemic. Of the multi-center clinical trials of TCHM that performed by mainland China and other oversees regions, except for Taiwan, China, nearly 70% were focused on classic Chinese medicinal formulae and Chinese patent medicine, while the other 30% were on dietary supplements and plant extracts. Facing the future, the "human experience" has attracted close attentions from researchers throughout the world. Effectively utilizing the historic "human experience" is an important method to vitalize potential of original scientific and technological resources of TCHM. Performing multi-center clinical trials with high qualities is still an essential method for TCHM in accessing the mainstream medicine market. In addition, it is also required to further improve the evaluation techniques and methods that not only meet the international standards but also meet the characteristics of TCHM. Furthermore, we should also focus on the TCHM specific clinical values and scientific reports.
    Language English
    Publishing date 2023-05-18
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2587355-6
    ISSN 1663-9812
    ISSN 1663-9812
    DOI 10.3389/fphar.2023.1195364
    Database MEDical Literature Analysis and Retrieval System OnLINE

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