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Antifungal Performance and Mechanisms of Carbon Quantum Dots in Cellulosic Materials

ACS NANO 2025年第14期19卷 14121-14136页

作者： Zhao, Xiaoqi Zhang, Shaodi Zhang, Mingchang Zhang, Zhenxin Zhou, Meng Cao, Jinzhen Beijing Forestry Univ MOE Key Lab Wooden Mat Sci & Applicat Beijing 100083 Peoples R China

Cellulosic materials, which are widely utilized in daily life, are highly susceptible to fungal degradation. However, commercial fungicides are usually toxic, posing severe threats to human health and the environment, highlighting the necessity of developing eco-friendly antifungal agents for cellulosic materials. In this work, we synthesized nitrogen-doped carbon quantum dots (CQDs) via a microwave-assisted method. CQDs with proper structure demonstrated significant antifungal effects against both brown-rot (Postia placenta, Pp) and white-decay fungi (Trametes versicolor, Tv) on various cellulosic materials. The underlying antifungal mechanisms of CQDs on cellulosic materials were further elucidated. We found that positively charged nanosized CQDs primarily adhered to and penetrated into fungal cell membranes. This led to fungal metabolism disorder, a significant reduction in enzymatic activities, and ultimately cell death, as confirmed by transcriptome analysis. Additionally, CQDs generated reactive oxygen species (ROS) under light, causing oxidation and dysfunction of the fungal cell wall. Furthermore, CQDs have the ability to chelate Fe3+, which results in the inhibition of the Fenton reaction and the hindering of the nonenzymatic cellulose degradation. These findings suggest that CQDs inhibit fungal degradation of cellulosic materials through integrated mechanisms, with potential implications for sustainable cellulose applications.

关键词： cellulosic materials carbon quantum dots (CQDs) antifungal mechanisms reactive oxygen species (ROS) gene expression

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High energy density in ultra-thick and flexible electrodes enabled by designed conductive agent/binder composite

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Journal of Energy Chemistry 2024年第3期90卷 133-143,I0005页

作者： Xiaoyu Shen Hailong Yu Liubin Ben Wenwu Zhao Qiyu Wang Guanjun Cen Ronghan Qiao Yida Wu Xuejie Huang Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808Guangdong China

Thick electrodes can increase incorporation of active electrode materials by diminishing the proportion of inactive constituents,improving the overall energy density of ***,thick electrodes fabricated using the conventional slurry casting approach frequently exhibit an exacerbated accumulation of carbon additives and binders on their surfaces,invariably leading to compromised electrochemical *** this study,we introduce a designed conductive agent/binder composite synthesized from carbon nanotube and *** agent/binder composite facilitates production of dry-process-prepared ultra-thick electrodes endowed with a three-dimensional and uniformly distributed percolative architecture,ensuring superior electronic conductivity and remarkable mechanical *** this approach,ultra-thick LiCoO_(2)(LCO) electrodes demonstrated superior cycling performance and rate capabilities,registering an impressive loading capacity of up to 101.4 mg/cm^(2),signifying a 242% increase in battery energy *** another analytical endeavor,time-of-flight secondary ion mass spectroscopy was used to clarify the distribution of cathode electrolyte interphase(CEI) in cycled LCO *** results provide unprecedented evidence explaining the intricate correlation between CEI generation and carbon distribution,highlighting the intrinsic advantages of the proposed dry-process approach in fine-tu ning the CEI,with excellent cycling performance in batteries equipped with ultra-thick electrodes.

关键词： Conductive agent/binder composite Dry process Ultra-thick electrodes High energy density CEI reconstruction ToF-SIMS

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Recent advances in zeolite membranes for gas separation and pervaporation in petrochemicals

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JOURNAL OF MATERIALS CHEMISTRY A 2025年第15期13卷 10358-10387页

作者： Han, Xinhong Xu, Wanyi Meng, Fanfei Liu, Zhiyu Liao, Changjian Petrochemicals Co Ltd SINOPEC Dalian Res Inst Petr Dalian 116045 Peoples R China

Zeolite-based membrane separation technology offers an efficient and sustainable solution to the separation and purification needs of modern industry. This review highlights advancements in zeolite membranes, focusing particularly on LTA, CHA, and DDR type small-pore zeolite membranes, as well as MFI type medium-pore zeolite membranes. Recent developments and innovations in membrane preparation technologies are first analyzed. Next, optimization strategies for zeolite membrane structures are summarized, emphasizing improvements in permeability, selectivity, and stability. These membranes demonstrate significant application potential in petrochemical processes, including hydrogen recovery, natural gas purification, carbon dioxide capture, hydrocarbon mixture separation, organic solvent dehydration, and membrane reactors. Finally, the challenges and opportunities associated with the synthesis and application of zeolite membranes are discussed, providing insights for future research directions.

关键词： Petrochemicals

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Efficient remediation of different concentrations of Cr-contaminated soils by nano zero-valent iron modified with carboxymethyl cellulose and biochar

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Journal of Environmental Sciences 2025年第1期147卷 474-486页

作者： Lihong Xie Qiyan Ma Qingjun Chen Yiyang Liu Pengfei Guo Jinlan Zhang Guilan Duan Aijun Lin Tingting Zhang Shangyi Li Department of Environmental Science and Engineering College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China China National Petroleum and Chemical Planning Institute Beijing 100013China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

Nano zero-valent iron(nZVI)is widely used in soil remediation due to its high ***,the easy agglomeration,poor antioxidant ability and passivation layer of Fe-Cr coprecipitates of nZVI have limited its application scale in Cr-contaminated soil remediation,especially in high concentration of Cr-contaminated ***,we found that the carboxymethyl cellulose on nZVI particles could increase the zeta potential value of soil and change the phase of *** with the presence of biochar,97.0%and 96.6%Cr immobilization efficiency through CMC-nZVI/BC were respectively achieved in high and low concentrations of Cr-contaminated soils after 90-days *** addition,the immobilization efficiency of Cr(VI)only decreased by 5.1%through CMC-nZVI/BC treatment after 10 weeks aging in air,attributing to the strong antioxidation *** for the surrounding Crcontaminated groundwater,the Cr(VI)removal capacity of CMC-nZVI/BC was evaluated under different reaction conditions through column experiments and COMSOL ***-nZVI/BC could efficiently remove 85%of Cr(VI)in about 400 hr when the initial Cr(VI)concentration was 40 mg/L and the flow rate was 0.5 mL/*** study demonstrates that uniformly dispersed CMC-nZVI/BC has an excellent remediation effect on different concentrations of Cr-contaminated soils.

关键词： Carboxymethyl cellulose Nanoscale zero-valent iron Biochar Cr-contaminated soils

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Heterologous expression of sulfur: quinone oxidoreductase (Sqr) to improve Thioalkalivibrio versutus D301 desulfurization performance

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JOURNAL OF APPLIED MICROBIOLOGY 2024年第9期135卷 lxae237页

作者： Tian, Zhuang Yu, Chenxi Li, He Song, Bin Lv, Jianwei Liu, Chuang Sun, Wanting Hu, Xiao Xiong, Yixi Liu, Jinlong Cheng, Xiyu Yang, Maohua Xing, Jianmin Beijing Jiaotong Univ Sch Phys Sci & Engn 3 Shangyuancun Beijing 100044 Peoples R China Hebei Univ Sci & Technol Sch Food Sci & Biol 26 Yuxiang St Shijiazhuang 050018 Hebei Peoples R China Hebei China Pharmaceut Huaheng Pharmaceut Co Ltd Xingwang RdBioind Pk Shijiazhuang 051530 Hebei Peoples R China NCPC Environm Protect & Res Co Ltd 29 Century Ave Shijiazhuang 052160 Hebei Peoples R China Hebei Univ Sci & Technol Sch Environm Sci & Engn 26 Yuxiang St Shijiazhuang 050018 Hebei Peoples R China Chinese Acad Sci Inst Proc Engn CAS Key Lab Green Proc & Engn 1 Zhongguancun North 2nd St Beijing 100190 Peoples R China Univ Chinese Acad Sci Coll Chem Engn 80 Zhongguancun East Rd Beijing 100049 Peoples R China

Aims: Heterologous expression of sulfur: quinone oxidoreductase (Sqr) from Halomonas mongoliensis JS01, which is responsible for oxidizing sulfide to elemental sulfur, in Thioalkalivibrio versutus (T. versutus) D301 improves desulfurization. Methods and results: We expressed sqr in T. versutus D301 by conjugative transfer and then assayed its desulfurization capacity in an airlift reactor and analyzed its transcriptome at -380 mV ORP. Our findings demonstrate that the D301-sqr(+) strain, utilizing sodium sulfide as a sulfur source under optimal ORP conditions (-380 mV), achieved an elemental sulfur yield of 95%. This represents an 8% increase over the T. versutus D301. Moreover, the sodium sulfide utilization rate for D301-sqr+ showed a marked improvement [0.741 vs. 0.651 mmol center dot(lh)(-1)], with a concurrent increase in the rate of elemental sulfur production when compared to the T. versutus D301 (0.716 vs. 0.518 mmol center dot(lh)(-1)). Transcriptome analysis revealed that the flavocytochrome c (fcc) and the sox system were differentially transcriptionally down-regulated in D301-sqr+ compared with the T. versutus D301. Conclusions: Heterologous expression of the gene sqr altered the transcription of related genes in T. versutus D301 sulfur oxidation pathway, increasing the yield of elemental sulfur and the rate of sulfur oxidation, and making D301-sqr(+) more potential for industrial applications.

关键词： biological desulfurization Thioalkavibrio versutus sulfur: quinone oxidoreductase sulfur metabolism

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Architecture design and advanced manufacturing of heart-on-a-chip:scaffolds,stimulation and sensors

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Microsystems & Nanoengineering 2024年第4期10卷 1-21页

作者： Feng Xu Hang Jin Lingling Liu Yuanyuan Yang Jianzheng Cen Yaobin Wu Songyue Chen Daoheng Sun Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361102China Guangdong Provincial People’s Hospital Guangzhou 510080China School of Basic Medical Sciences Southern Medical UniversityGuangzhou 510515China

Heart-on-a-chip(HoC)has emerged as a highly efficient,cost-effective device for the development of engineered cardiac tissue,facilitating high-throughput testing in drug development and clinical *** is primarily used to create a biomimetic microphysiological environment conducive to fostering the maturation of cardiac tissue and to gather information regarding the real-time condition of cardiac *** development of architectural design and advanced manufacturing for these“3S”components,scaffolds,stimulation,and sensors is essential for improving the maturity of cardiac tissue cultivated on-chip,as well as the precision and accuracy of tissue *** this review,the typical structures and manufacturing technologies of the“3S”components are *** design and manufacturing suggestions for each component are ***,key challenges and future perspectives of HoC platforms with integrated“3S”components are discussed.

关键词： stimulation summarized maturity

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Stress-assisted corrosion mechanism of 3Ni steel by using gradient boosting decision tree machining learning method

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1311-1321页

作者： Xiaojia Yang Jinghuan Jia Qing Li Renzheng Zhu Jike Yang Zhiyong Liu Xuequn Cheng Xiaogang Li Institute of Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China AECC Key Laboratory of Advanced Corrosion and Protection of Aeronautical Materials AECC Beijing Institute of Aeronautical MaterialsBeijing 100095China Shunde Innovation School University of Science and Technology BeijingFoshan 528399China

Traditional 3Ni weathering steel cannot completely meet the requirements for offshore engineering development,resulting in the design of novel 3Ni steel with the addition of microalloy elements such as Mn or Nb for strength enhancement becoming a *** stress-assisted corrosion behavior of a novel designed high-strength 3Ni steel was investigated in the current study using the corrosion big data *** information on the corrosion process was recorded using the galvanic corrosion current monitoring *** gradi-ent boosting decision tree(GBDT)machine learning method was used to mine the corrosion mechanism,and the importance of the struc-ture factor was *** exposure tests were conducted to verify the calculated results using the GBDT *** indic-ated that the GBDT method can be effectively used to study the influence of structural factors on the corrosion process of 3Ni ***-ferent mechanisms for the addition of Mn and Cu to the stress-assisted corrosion of 3Ni steel suggested that Mn and Cu have no obvious effect on the corrosion rate of non-stressed 3Ni steel during the early stage of *** the corrosion reached a stable state,the in-crease in Mn element content increased the corrosion rate of 3Ni steel,while Cu reduced this *** the presence of stress,the increase in Mn element content and Cu addition can inhibit the corrosion *** corrosion law of outdoor-exposed 3Ni steel is consistent with the law based on corrosion big data technology,verifying the reliability of the big data evaluation method and data prediction model selection.

关键词： weathering steel stress-assisted corrosion gradient boosting decision tree machining learning

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Robot trajectory planning for autonomous 3D reconstruction of cockpit in aircraft final assembly testing

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Chinese Journal of Aeronautics 2024年第3期37卷 332-350页

作者： Yanzhe WANG Zemin PAN Qian YANG Changxi DENG Yanding WEI The State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China School of Information Science and Engineering NingboTech UniversityNingbo 315100China AVIC Xi’an Aircraft Industry(Group)Company Ltd. Xi’an 710089China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China

The trend towards automation and intelligence in aircraft final assembly testing has led to a new demand for autonomous perception of unknown cockpit operation scenes in robotic collaborative airborne system *** address this demand,a robotic automated 3D reconstruction cell which enables to autonomously plan the robot end-camera’s trajectory is developed for image acquisition and 3D modeling of the cockpit operation scene.A continuous viewpoint path planning algorithm is proposed that incorporates both 3D reconstruction quality and robot path quality into optimization *** metrics for viewpoint position paths and orientation paths are introduced together for the first time in 3D *** ensure safe and effective movement,two spatial constraints,Domain of View Admissible Position(DVAP)and Domain of View Admissible Orientation(DVAO),are implemented to account for robot reachability and collision *** using diffeomorphism mapping,the orientation path is transformed into 3D,consistent with the position *** orientation and position paths can be optimized in a unified framework to maximize the gain of reconstruction quality and path smoothness within DVAP and *** reconstruction cell is capable of automatic data acquisition and fine scene modeling,using the generated robot C-space *** and physical scene experiments have confirmed the effectiveness of the proposed method to achieve highprecision 3D reconstruction while optimizing robot motion quality.

关键词： Aircraft assembly testing Aircraft cockpit 3D modeling Camera viewpoint Robot trajectory planning

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Evaluation Method of Motor Coordination Ability in Children Based on Machine Vision

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Tsinghua Science and Technology 2025年第2期30卷 633-649页

作者： Yi Lei Dawei Shu Miao Yu Donglin Shi Jianqiang Li Yanjie Chen Faculty of Information Technology Beijing University of TechnologyBeijing 100124China Department of Automation Tsinghua UniversityBeijing 100084China Pharmacovigilance Research Center for information technology and Data Science Cross-strait Tsinghua Research InstituteXiamen 361000China Institute of Systems Engineering Dalian University of TechnologyDalian 116024China Physical Education Department Hebei Sports UniversityShijiazhuang 050049China Department of Children’s Health Care Center Beijing Children’s HospitalCapital Medical UniversityNational Center for Children’s HealthBeijing 100045China

Motor coordination is crucial for preschoolers’development and is a key factor in assessing childhood *** diagnostic methods often rely on subjective manual *** paper presents a machine vision-based approach aimed at improving the objectivity and adaptability of *** method proposed involves the extraction of key points from the human skeleton through the utilization of a lightweight pose estimation network,thereby transforming video assessments into evaluations of keypoint *** study uses different methods to handle static and dynamic actions,including regularization and Dynamic Time Warping(DTW)for spatial alignment and temporal discrepancies.A penalty-adjusted single-frame pose similarity method is used to evaluate *** lightweight pose estimation model reduces parameters by 85%,uses only 6.6%of the original computational load,and has an average detection missing rate of less than 1%.The average error for static actions is 0.071 with a correlation coefficient of 0.766,and for dynamic actions it is 0.145 with a correlation coefficient of *** results confirm the proposed method’s effectiveness,which includes customized visual components like motion waveform graphs to improve accuracy in pediatric healthcare diagnoses.

关键词： developmental coordination disorder action quality assessment pose estimation dynamic time warping decision support system

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Adsorption, separation and recovery properties of blocky zeolite-biochar composites for remediation of cadmium contaminated soil

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Chinese Journal of Chemical Engineering 2023年第2期54卷 272-279页

作者： Miaomiao Zhao Degang Ma Yu Ye School of Environmental Science and Engineering Tianjin UniversityTianjin 300350China

Cadmium(Cd) contamination in soils is a global ecological threat. Conventional powdered biochar added to soil can temporarily immobilize Cd but is difficult to separate from soil, leading to secondary release of Cd and posing potential ecological and human health risks. The blocky biochar is also difficult to separate from the soil due to its fragile nature. One of the keys to overcome the difficulties in separating biochar from soil is to improve its mechanical strength. Blocky zeolite-biochar composites(ZBC) that have good mechanical strength were obtained after pyrolyzing the mixture of 50% feedstock and 50% zeolite powder at 400 ℃. ZBC and NaOH-activated ZBC(ZBC_a) were applied to remove Cd from soil. After sieving Cd-loaded ZBC and ZBC_a from soil, the bioavailable Cd content in the soil decreased by 59.70% and 68.54%,respectively. Zeolite contributed to improving both adsorption performance and mechanical properties of the composites. After repeating the process of “remediation-sieving-desorption-regeneration” three times, the recoveries of ZBC and ZBC_a were above 97.00%, and regeneration rates were 48.70-83.26%,respectively. Under simulated mechanical sieving conditions, ZBC and ZBC_a lost only 4.06% and 5.40%of their mass and retained their integrity. Remediation of Cd-contaminated soil with blocky zeolitebiochar composite is sustainable and safe because the removal of bioavailable Cd from soil is permanent rather than a temporary decrease of bioavailability. This study provides a reference for the preparation of separable and recyclable adsorbents for the removal of contaminants from soil.

关键词： Zeolite-biochar composite Adsorption Separation Recycling Cd-contaminated soil

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