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Multisite synergistic interaction induced selective adsorption of CB5-Ti3C2T2 complex for strontium ion: A combined theoretical and experimental study

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JOURNAL OF HAZARDOUS MATERIALS 2025年 487卷 137288页

作者： li, Sifan Zhang, Pengcheng Zhang, Yujuan Qiu, Kaikai Wang, lin Lan, Jianhui Zhang, Yu Zhao, xuwen Miao, Chengzhen Shi, Weiqun Univ Sci & Technol Beijing Sch Mat Sci & Engn Beijing 100083 Peoples R China Chinese Acad Sci Inst High Energy Phys Lab Nucl Energy Chem Beijing 100049 Peoples R China Shanghai Jiao Tong Univ Sch Nucl Sci & Engn Minist Educ Shanghai 200240 Peoples R China Shanghai Jiao Tong Univ Key Lab Nucl Power Syst & Equipment Minist Educ Shanghai 200240 Peoples R China

In this work, we use a well-defined water-soluble macrocyclic molecule cucurbit[5]uril (CB5) to modify 2D Ti3C2T2 MXene and assemble a novel high-performance adsorbent CB5-Ti3C2T2 for Sr ion by density functional theory and experimental methods. The structural stabilities of two distinct types of CB5-Ti3C2T2 (T = F, O and OH) complexes, i.e., CB5-Ti3C2T2(V) and CB5-Ti3C2T2(P) configurations are proved by binding energy and ab initio molecular dynamics (AIMD) simulations. Calculations of adsorption properties reveal that all the considered CB5-Ti3C2T2 complexes can act as efficient adsorbents for Sr ion, among which CB5-Ti3C2O2 complex possesses the best performance. The high affinity (the calculated adsorption energies < -7.6 eV) and selectivity of CB5-Ti3C2T2 complex for Sr ion are attributed to the synergistic effect between CB5 molecule and Ti3C2T2 MXene in the adsorption process, which arises from the multisite interactions of portal carbonyl groups of CB5 and surface functional groups of Ti3C2T2 towards Sr. Finally, CB5-Ti3C2T2 complex was successfully synthesized, and experimental results confirm its synergistic effect, good selectivity and high removal efficiency for Sr ions. In the treatment of strontium-containing wastewater with low concentrations, the distribution coefficient and decontamination factor of CB5-Ti3C2T2 for Sr were determined to be as high as 2.88 x 10(5) mL/g and 144.9, respectively, and the separation factor (SFSr/Ca) achieved a notable value of 67. 5. This work is expected to present a new strategy for the construction of high-performance MXene-based adsorbent for radionuclide elimination.

关键词： MXene Cucurbit[5]uril Adsorption Strontium First-principles simulation

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Research on the Performance of DSP Parallel System

Research on the Performance of DSP Parallel System

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2013 3rd International Conference on Advanced Measurement and Test(AMT 2013)

作者： Sun Xiaoqun Wu Qiang li xuwen Zheng Xin College of Electronic and Control Engineering of Beijing University of Technology College of Life Science and Bioengineering of Beijing University of Technology

This paper introduces the performance metric of DSP parallel processing system and presents a model of coarse-grained speedup of DSP parallel processing *** research is done according to the system performance index and target program *** study simulates and analyzes different communication protocols and different influences of different degrees of parallelism on the parallel processing structure *** direction of parallel processing system is put forward.

关键词： Parallel system performance Speedup ratio Communication protocol

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A highly sensitive one-step nanobody-based immunoassay to specifically detect antibodies against fowl adenovirus serotype 4

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POULTRY SCIENCE 2025年第4期104卷 104970页

作者： Ji, Pinpin Zhang, Hao Xiri, Yangzong li, Ziling liu, Zhixiang Dan, Miao li, Xiaoxuan Sun, xuwen Zhao, Qin Sun, Yani Northwest A&F Univ Coll Vet Med Dept Prevent Vet Med Yangling 712100 Shaanxi Peoples R China Minist Agr Sci Observing & Expt Stn Vet Pharmacol & Diagnost Yangling 712100 Shaanxi Peoples R China

Hepatitis-hydropericardium syndrome, caused by fowl adenovirus serotype 4 (FAdV-4), has resulted in significant economic damage to the poultry industry. To monitor viral exposure and vaccine efficacy, some traditional antibody-based immunoassays have been developed for detecting anti-FAdV-4 antibodies. However, these assays have some drawbacks including multi-step operations and higher production cost. Recently, nanobodies are regarded as a promising tool for developing immunoassays. In the study, 23 nanobodies against FAdV-4 were screened and expressed with horseradish peroxidase (HRP) in the HEK293T cells. Then, the FAdV-4-Nb28-HRP fusion protein was selected for developing competitive enzyme-linked immunoassays (cEliSA) to detect antiFAdV-4 antibodies in the chicken sera. The optimal concentrations and dilutions for the coating antigen, fusion protein and testing sera were determined to be 400 ng/well, 1:80 and 1:20, respectively. After the coated plates were vacuumized and stored, the operation of cEliSA to detect clinical chicken sera was only one-step and the full time was 75 min. The cEliSA also exhibited high sensitivity, specificity, reproducibility and good agreement with the commercial EliSA kit. When the sequential sera from the challenged chickens were tested, the cEliSA showed superior sensitivity compared with the commercial EliSA kit. Moreover, epitope mapping revealed that the nanobody specifically recognized the sites GLN235 ASN236 SER238 of the fiber-1 protein, highly conserved among different FAdV-4 isolates and different from the FAdV-1 and-8. The results indicated that cEliSA can specifically detect anti-FAdV-4 antibodies. Collectively, the developed one-step nanobody-based cEliSA is an ideal method for epidemiological investigation and vaccine immune evaluation of FAdV-4.

关键词： Nanobody One-step competitive EliSA FAdV-4 antibodies Fiber-1 protein

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Monitoring and numerical analysis of slope deformation in a coal mine in the southwest mountainous regions of China

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NATURAL HAZARDS 2025年第6期121卷 6955-6979页

作者： Tian, xuwen Yao, Xin Tao, Tao Iqbal, Javed Ren, Kaiyu Zhou, Zhenkai Yao, Chuangchuang li, Qiyu li, lingjing Gu, Zhenkui Chinese Acad Geol Sci Inst Geomech Beijing 100081 Peoples R China Minist Nat Resources Key Lab Act Tecton & Geol Safety Beijing 100081 Peoples R China China Geol Survey Res Ctr Neotectonism & Crustal Stabil Beijing 100081 Peoples R China Univ Haripur Dept Earth Sci Haripur 22620 Pakistan Chinese Acad Sci China Pakistan Joint Res Ctr Earth Sci Islamabad Pakistan

As underground coal mining activities are increasing in the southwestern mountainous areas of China, the geological safety issues related to ground subsidence and slope deformation have emerged as significant concerns. These issues have started to impact the routine mining operations. Monitoring deformation and analyzing the mechanical behavior of mining areas can help reveal the deformation patterns at surface level and on typical slopes in mountainous coalfields, ultimately reducing the risk of landslides. Taking the Guangfeng coal mine as a case study, this paper employs Interferometric Synthetic Aperture Radar (InSAR) and numerical simulation to analyze the influence of surface deformation caused by underground mining activities on slope deformation. The InSAR results indicate the presence of two distinct subsidence areas, labeled as I and II. The maximum annual subsidence rate in area I reaches 72 mm/a, while area II shows an annual deformation rate of 59 mm/a. The subsidence around the mined-out area has triggered sliding deformation in the slopes, which aligns with the numerical simulation results obtained from the fast Lagrangian analysis of continua in three dimensions (FLAC3D). As mining advances further into the working face, greater tensile stress develops at the rear edge of the slope, causing the subsidence at the center of surface which gradually shifts towards the top of the slope. The process of slope deformation related to underground coal mining in mountainous regions can be divided into four stages: the original slope stage, the early stage of underground mining, the evolution stage of composite slope deformation, and the stage of increased surface subsidence in the slope. By combining InSAR technology with FLAC3D numerical simulations, surface movements in mountainous mining areas can be accurately and reliably monitored and analyzed. This approach provides effective guidance for deformation monitoring and prediction of slope stability in mining

关键词： Underground mining in mountain area InSAR Subsidence monitoring Numerical simulation Slope deformation

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Prediction of hypertensive disorders in pregnancy based on placental growth factor

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TECHNOLOGY AND HEALTH CARE 2021年第1_suppl期29卷 S165-S170页

作者： Xu, Qi Sun, Ge Zhang, Song liu, Guoli Yang, lin Meng, Yu Chen, Aiqing Yang, Yimin li, xuwen Hao, Dongmei liu, Xiaohong Shao, Jing Peking Univ Peoples Hosp Beijing 100044 Peoples R China Beijing Univ Technol Fac Environm & Life Sci Beijing 100124 Peoples R China Beijing Int Sci & Technol Cooperat Base Intellige Beijing 100124 Peoples R China Beijing Yes Med Devices Co Ltd Beijing 100152 Peoples R China

BACKGROUND: The prediction of hypertensive disorders in pregnancy (HDP) mainly involves various aspects such as maternal characteristics and biomarkers. OBJECTIVE: We aimed to study the effect of the HDP prediction model with or without placental growth factor (PlGF). METHODS: This study used maternal factors and PlGF, and standardized the data uniformly. At 12-20 weeks, the comprehensive comparison of model quality with or without PlGF was conducted by logistic regression. RESULTS: The area under curve and the model accuracy of the model with PlGF were higher than those of the model without PlGF. The accuracy of the model with PlGF was above 90%. CONCLUSIONS: Adding PlGF to the model for predicting HDP improved the accuracy and effectiveness of the model. This study confirmed the predictive performance of PlGF.

关键词： Model accuracy placental growth factor logistic regression

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Gradient tumor microenvironment-promoted penetrating micelles for hypoxia relief and immunosuppression reversion in pancreatic cancer treatment

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ACTA BIOMATERIAliA 2023年第1期167卷 387-400页

作者： Luo, Yifan li, Chao Zhang, Yiwen liu, Peixin Chen, Hongyi Zhao, Zhenhao Wang, Yu Zhou, Zheng Song, Haolin Su, Boyu li, Chufeng li, xuwen Zhang, Tongyu You, Haoyu Wu, Yuxing Tian, Zonghua Zhang, Shilin Guo, Yun Fan, Hongrui Chen, Qinjun Jiang, Chen Sun, Tao Fudan Univ Minhang Hosp Sch Pharm Dept Pharmaceut Shanghai 201203 Peoples R China Fudan Univ MOE Frontiers Ctr Brain Sci Shanghai 201203 Peoples R China

The tumor microenvironment of pancreatic ductal adenocarcinoma (PDAC) is the main block for the penetration of chemotherapy. In the tumor microenvironment, a dense matrix composed of fibrin is formed on the exterior, while the interior is featured by high reduction, hypoxia and low pH. How to match the special microenvironment to on-demand drug release is the key to improve chemotherapeutic efficacy. Herein, a microenvironment-responsive micellar system is developed to deepen tumoral penetration. Briefly, the conjugation of a fibrin-targeting peptide to PEG-poly amino acid has been utilized to achieve accumulation of micelles in the tumor stroma. By modification of micelles with hypoxia-reducible nitroimidazole which becomes protonated under acidic conditions, their surface charge is more positive, facilitating deeper penetration into tumors. Paclitaxel was loaded onto the micelles via a disulfide bond to enable glutathione (GSH)-responsive release. Therefore, the immunosuppressive microenvironment is relived through the alleviation of hypoxia and depletion of GSH. Hopefully, this work could establish paradigms by designing sophisticated drug-delivery systems to tactfully employ and retroact the tamed tumoral microenvironment to improve the therapeutic efficacy based on understanding the multiple hallmarks and learning the mutual regulation.

关键词： Pancreatic cancer Penetration Nitroimidazole Tumor hypoxia Gemcitabine

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Preparation and properties of ceramic coated nitrogen-doped carbon coated SiOx anode materials for lithium-ion batteries

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APPliED PHYSICS A-MATERIALS SCIENCE & PROCESSING 2025年第5期131卷 1-7页

作者： Zhou, Zhengyang Wen, lijun Jin, Chenxin Hong, Junjie liu, xuwen Xu, Guojun Sun, Fugen li, Yong Zhou, Lang Yue, Zhihao Nanchang Univ Inst Photovolta Nanchang 330031 Peoples R China Jiangxi Prov Key Lab Solar Photovolta Nanchang 330031 Peoples R China NCU GQC Inst PV HE ES Technol Gongqing 332020 Peoples R China Nanchang Univ Sch Phys & Mat Sci Nanchang 330031 Peoples R China

Nitrogen doping and carbon coating were identified to be two effective ways to alleviate the problems of silicon raw materials in our previous work. Building upon the foundation of this, a ceramic coating technique is introduced to further enhance the physical and electrochemical characteristics of nitrogen-doped carbon-coated silicon monoxide (N-doped SiOx@C) materials. This study explores the application of alumina (Al2O3) and boehmite (AlOOH) powders as coating on the surface of N-doped SiOx@C materials to assess their effects. The outcomes demonstrate that AlOOH coating surpasses Al2O3 coating in terms of wettability and liquid absorption capacity, leading to a reduction in the contact angle from 28 degrees to 20 degrees. Following 100 cycles at a current density of 1.05 Ag-1, the capacity retention rate of AlOOH coated N-doped SiOx@C materials reaches 98.4%, whereas uncoated materials maintain a capacity retention rate of 91.4%. Notably, AlOOH coating significantly enhances the electrochemical performance of N-doped SiOx@C materials.

关键词： Ceramic coating Surface modification Silicon oxide materials lithium ion batteries

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Solid electrochemiluminescence sensor by immobilization luminol in Zn-Co-ZIF CNFs for sensitive detection of procymidone in vegetables

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MICROCHIMICA ACTA 2024年第9期191卷 508-508页

作者： Lu, Juan Guo, Yanjia Shan, Xiangyu Song, Yujia li, Ruidan Tian, li li, xuwen Changchun Normal Univ Coll Chem Changchun 130032 Peoples R China Jilin Univ Coll Chem Changchun 130022 Peoples R China Technol Innovat Lab Res & Dev Econ Plants & Edible Changchun 130032 Jilin Peoples R China

A solid-state electrochemiluminescence (ECL) sensor was fabricated by immobilizing luminol, a classical luminescent reagent, on a Zn-Co-ZIF carbon fiber-modified electrode for the rapid and sensitive detection of procymidone (PCM) in vegetable samples. The sensor was created by sequentially modifying the glassy carbon electrode with Zn-Co-ZIF carbon fiber (Zn-Co-ZIF CNFs), Pt@Au NPs, and luminol. Zn-Co-ZIF CNFs, prepared through electrospinning and high-temperature pyrolysis, possessed a large specific surface area and porosity, making it suitable as carrier and electron transfer accelerator in the system. Pt@Au NPs demonstrated excellent catalytic activity, effectively enhancing the generation of active substances. The ECL signal was significantly amplified by the combination of Zn-Co-ZIF CNFs and Pt@Au NPs, which can subsequently be diminished by procymidone. The ECL intensity decreased proportionally with the addition of procymidone, displaying a linear relationship within the concentration range 1.0 x 10-13 to 1.0 x 10-6 mol L-1 (R2 = 0.993). The sensor exhibited a detection limit of 3.3 x 10-14 mol L-1 (S/N = 3) and demonstrated outstanding reproducibility and stability, making it well-suited for the detection of procymidone in vegetable samples.

关键词： Electrochemiluminescence Carbon nanofibers Modified glassy carbon electrode Procymidone Luminol

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Combining UAV multisensor field phenotyping and genome-wide association studies to reveal the genetic basis of plant height in cotton (Gossypium hirsutum)

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PLANT PHENOMICS 2025年第1期7卷

作者： Fan, liqiang Yang, Jiajie Wang, xuwen liu, Zhao Xu, Bowei liu, li Gao, Chenxu Ai, Xiantao li, Fuguang Gao, Lei Yu, Yu Yang, Zuoren Chinese Acad Agr Sci Inst Cotton Res State Key Lab Cotton Biobreeding & Integrated Util Anyang 455000 Henan Peoples R China CAAS Inst Western Agr Xinjiang Key Lab Crop Gene Editing & Germplasm Inn Changji 831100 Xinjiang Peoples R China Xinjiang Acad Agr & Reclamat Sci Cotton Res Inst Northwest Inland Reg Key Lab Cotton Biol & Genet B Minist Agr Urumqi Peoples R China Zhengzhou Univ Sch Agr Sci State Key Lab Cotton Biobreeding & Integrated Util Zhengzhou Res Base Zhengzhou 450001 Henan Peoples R China Xinjiang Univ Res Inst Coll Smart Agr Urumqi 830046 Xinjiang Peoples R China Xinjiang Agr Univ Coll Agr Engn Res Ctr Cotton Minist Educ 311 Nongda East Rd Urumqi 830052 Peoples R China

Plant height (PH) is a key agronomic trait influencing plant architecture. Suitable PH values for cotton are important for lodging resistance, high planting density, and mechanized harvesting, making it crucial to elucidate the mechanisms of the genetic regulation of PH. However, traditional field PH phenotyping largely relies on manual measurements, limiting its large-scale application. In this study, a high-throughput phenotyping platform based on UAV-mounted RGB and light detection and ranging (liDAR) was developed to efficiently and accurately obtain time series PHs of 419 cotton accessions in the field. Different strategies were used to extract PH values from two sets of sensor data, and the extracted values were used to train using linear regression and machine learning methods to obtain PH predictions. These predictions were consistent with manual measurements of the PH for the liDAR (R2 1/4 0.934) and RGB (R2 1/4 0.914) data. The predicted PH values were used for GWAS analysis, and 34 PH-related genes, two of which have been demonstrated to regulate PH in cotton, namely, GhPH1 and GhUBP15, were identified. We further identified significant differences in the expression of a new gene named GhPH_UAV1 in the stems of the G. hirsutum cultivar ZM24 harvested on the 15th, 35th, and 70th days after sowing compared with those from a dwarf mutant (pag1), which presented shortened stem and internode phenotypes. The overexpression of GhPH_UAV1 significantly promoted cotton stem development, whereas its knockout by CRISPR-Cas9 dramatically inhibited stem growth, suggesting that GhPH_UAV1 plays a positive regulatory role in cotton PH. This field-scale high-throughput phenotype monitoring platform significantly improves the ability to obtain high-quality phenotypic data from large populations, which helps overcome the imbalance between massive genotypic data and the shortage of field phenotypic data and facilitates the integration of genotype and phenotype research for cr

关键词： Plant height UAV RGB liDAR Genome-wide association study

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The simultaneous control over the alternating sequence and the inner- core position of the mesogenic segments in side-chain liquid crystal polymers

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JOURNAL OF MOLECULAR liQUIDS 2022年 363卷

作者： Zhang, Ruixue Ma, Hongwei li, xuwen Wang, Bo li, Chao liao, Wen li, Yang Han, li Dalian Univ Technol Sch Chem Engn Dept Polymer Sci & Engn State Key Lab Fine ChemLiaoning Key Lab Polymer S Dalian 116024 Peoples R China

Hydrosilylated 1,1-diphenylethylene (DPE-SiH/2SiH) are herein quantitatively and alternatingly incorpo-rated during the living anionic copolymerization of isoprene with DPE-SiH/2SiH, which can efficiently control the Si-H densities and positions. The diversified mesogenic moieties containing azobenzene (Azo) or trifluoromethyl (F3C) groups, respectively, with the tuned inner-core position of the mesogenic segments are rationally designed and then fabricated into multiple alternatingly-arranged side-chain liq-uid crystal polymers (SCLCPs) along the alternating backbones. This study presents the novel SCLCPs with the simultaneous control over the sequence and the inner-core position of the mesogenic segment, pro-viding the promising route and study model to develop the mechanistic investigations. The temperature range of mesomorphic phase formation (delta T) and polarized optical morphologies are proved to be syner-gistically dependent on the diversified mesogenic moieties and the exactly controlled densities of the mesogenic segment. (C) 2022 Elsevier B.V. All rights reserved.

关键词： living anionic copolymerization Side -chain liquid crystal polymers Alternating sequence Azobenzene (Azo) Trifluoromethyl (CF3 ) groups

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