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胆碱类低共熔溶剂与氧化锌吸附分子动力学模拟

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矿产综合利用 2024年第3期45卷 179-186,192页

作者：张晋霞杨超高淑玲牛福生信晓飞华北理工大学矿业工程学院河北唐山063009 东北大学资源与土木工程学院辽宁沈阳110819 河北省地矿局第二地质大队河北唐山063000

这是一篇冶金工程领域的论文。为了更好实现含锌尘泥中氧化锌的浸出,采用基于密度泛函理论的Materials Studio软件模拟优化氧化锌晶体结构以及三种胆碱类低共熔溶剂结构,并对两者相互吸附模型进行计算。计算结果表明:ZnO(001)面为完全... 详细信息

这是一篇冶金工程领域的论文。为了更好实现含锌尘泥中氧化锌的浸出,采用基于密度泛函理论的Materials Studio软件模拟优化氧化锌晶体结构以及三种胆碱类低共熔溶剂结构,并对两者相互吸附模型进行计算。计算结果表明:ZnO(001)面为完全解理面,在费米能级附近最高占据态向左发生偏移,且最高占据态的波峰增加,峰值升高,在最高占据态中O的p轨道以及Zn的d轨道活性较大,为ZnO(001)面反应活性位点。对三种胆碱类低共熔溶剂优化发现氯化胆碱与三种不同氢键供体形成以氯原子为中心的多重分子间氢键。运用Forcite模块对低共熔溶剂与氧化锌吸附模型计算结果表明,氧化锌与三种胆碱类低共熔溶剂相互作用强弱为Chcl-MA>Chcl-Urea>Chcl-Eg。径向分布函数得出丙二酸使得氯化胆碱中的Cl更容易与Zn发生化学吸附,三种氢键供体中与Zn形成化学键的氧原子官能团活泼性为C=O、N-O、C-O,由此说明丙二酸中的C=O使得Chcl-MA与ZnO结合更稳定。通过实验验证发现Chcl-MA在浸出温度为70℃、液固比为10∶1、浸出时间1 h条件下可将氧化锌单矿物几乎完全浸出,浸出效果远远大于Chcl-Urea、Chcl-Eg两种药剂,从而证明了分子模拟的准确性,为胆碱类低共熔溶剂浸出含锌尘泥提供了理论指导。

关键词：冶金工程低共熔溶剂氧化锌完全解理面相互作用能化学吸附

Lupenone improves motor dysfunction in spinal cord injury mice through inhibiting the inflammasome activation and pyroptosis in microglia via the nuclear factor kappa B pathway

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Neural Regeneration Research 2024年第8期19卷 1802-1811页

作者： Fudong Li xiaofei Sun Kaiqiang Sun Fanqi Kong xin Jiang Qingjie Kong Department of Orthopedics Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Department of Orthopedic Surgery Spine CenterShanghai Changzheng HospitalNaval Medical UniversityShanghaiChina Department of Orthopedic Surgery Naval Medical CenterNaval Medical UniversityShanghaiChina Department of Anesthesiology Shanghai Changzheng HospitalNaval Medical UniversityShanghaiChina

Spinal cord injury-induced motor dysfunction is associated with *** have shown that the triterpenoid lupenone,a natural product found in various plants,has a remarkable anti-inflammatory effect in the context of chronic ***,the effects of lupenone on acute inflammation induced by spinal cord injury remain *** this study,we established an impact-induced mouse model of spinal cord injury,and then treated the injured mice with lupenone(8 mg/kg,twice a day)by intrape ritoneal *** also treated BV2 cells with lipopolysaccharide and adenosine5’-triphosphate to simulate the inflammatory response after spinal cord *** res ults showed that lupenone reduced IKBa activation and p65 nuclear translocation,inhibited NLRP3 inflammasome function by modulating nuclear factor kappa B,and enhanced the conve rsion of proinflammatory M1 mic roglial cells into anti-inflammatory M2 microglial ***,lupenone decreased NLRP3 inflammasome activation,NLRP3-induced mic roglial cell polarization,and microglia pyroptosis by inhibiting the nuclear factor kappa B *** findings suggest that lupenone protects against spinal cord injury by inhibiting inflammasomes.

关键词： inflammasome inflammation lupenone microglia polarization pyroptosis spinal cord injury

Searching for plant NLR immune receptors conferring resistance to potyviruses

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The Crop Journal 2024年第1期12卷 28-44页

作者： xin Hong Shufen Li xiaofei Cheng Haijian Zhi Jinlong Yin Kai Xu Jiangsu Key Laboratory for Microbes and Functional Genomics Jiangsu Engineering and Technology Research Center for MicrobiologyCollege of Life SciencesNanjing Normal UniversityNanjing 210023JiangsuChina College of Plant Protection Northeast Agricultural UniversityHarbin 150030HeilongjiangChina National Center for Soybean Improvement National Key Laboratory for Crop Genetics and Germplasm EnhancementKey Laboratory of Biology and Genetic Improvement of Soybean-Ministry of AgricultureNanjing Agricultural UniversityNanjing 210095JiangsuChina

To fight against invasion by pathogens,plants have evolved an elaborate innate immune system,of which the nucleotide-binding domain leucine-rich repeat-containing receptor(NLR)acts as the sensor and immune ***,comprising one of the largest genera of plant viruses,cause severe crop yield losses *** crop resistance to potyviruses can be used in breeding and plant transgenesis to control disease *** review summarizes achievements in mapping and cloning NLR genes conferring dominant resistance against potyvirus in the families Fabaceae,Solanaceae,Brassicaceae,and *** compares mechanisms of potyviral protein recognition and downstream signaling employed by NLRs and discusses strategies for exploiting NLRs to better control diseases caused by potyviruses.

关键词： NLR Potyvirus resistance Genetic diversity Mapping Engineer

Ultrathin GaN Film Derived from Amorphous Ga_(2)O_(3) Film

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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 814-818页

作者：王鹏 ZHANG Binbin LIU xiaofei ZHANG xin TU Rong ZHANG Song 李宝文 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Silicate Materials for Architectures School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China

It remains a big challenge to synthesize two-dimensional(2D)GaN material for applications in power *** synthetic methods require complex equipment and processes and time ***,we reported a two-step route to prepare polycrystalline 2D GaN *** amorphous ultrathin Ga_(2)O_(3)film was first exfoliated from the surface of liquid *** a vapor phase reaction,2D Ga_(2)O_(3)film was then converted into 2D GaN film while maintaining the 2D *** and high-resolution transmission electron microscope(HRTEM)analysis implies the successful synthesis of wurtzite-type GaN ultrathin *** simple strategy proposed in this work will provide more opportunities for applications of GaN ultrathin film in many devices.

关键词： GaN Ga_(2)O_(3) liquid gallium

YWHAZ gene contributes to the radioresistance of oral squamous cell carcinoma cells

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Radiation Medicine and Protection 2024年第1期5卷 30-36页

作者： Songling Hu Cong Chen Hengheng Chen xin Yu xiaofei Li Yang Bai Chunlin Shao Department of Preventive Dentistry Shanghai Stomatological Hospital&School of StomatologyShanghai Medical CollegeFudan UniversityShanghai 200001China Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases Shanghai Medical CollegeFudan UniversityShanghai 200001China Institute of Radiation Medicine Shanghai Medical CollegeFudan UniversityShanghai 200032China

Objective:To investigate the contribution of YWHAZ gene on the radioresistance and metastasis ability of oral squamous cell carcinoma(OSCC)***:The relationship between the expression level of YWHAZ gene and the survival of head and neck squamous cell carcinoma(HNSC)patients was analyzed using Gene Expression Profiling Interactive Analysis(GEPIA)database.A radioresistance cell line(CAL-27R)was constructed by irradiating CAL-27 cells with frac-tional *** survival was measured by colony formation *** migration and invasion were detected by transwell *** formation of yH2AX foci was detected by immunofluorescence assay,The protein expressions were detected by Westemn blot *** some experiments,CAL-27R cells were effectively transferred with siRNA YWHAZ(siYWHAZ).Results:GEPIA database showed that the expression level of YWHAZ in HNSC tumors was higher than that in adjacent normal tissues,and the HNSC patients with higher level of YWHAZ had a shorter *** vitro experiments demonstrated that the expression of YWHAZ protein in CAL-27 cells was lower than HSC-3 cells(t=18.89,P<0.01)and radioresistant CAL-27R cells(t=25.70,P<0.01).Knockdown of YWHAZ gene significantly increased radiation-induced cell killing effect,apoptosis induction,and yH2AX foci formation inCAL-27R and HSC-3 ***,siRNA YWHAZ transfection also reduced the invasion and migration abilities of the irradiated CAL 27R[t=21.09,P<0.01(migration);t=6.16,P<0.05(invasion)]and HSC-3 cells[t=34.53,P<0.001(migration);t=4.92,P<0.05(invasion)]and attenuated radiation-induced expressions of metastasis-related proteins,Conclusion:YWHAZ contributes to the radioresistance of oral squamous cells and thus it may applicable to be a potential target for OSOC radiotherapy.

关键词： Oral squamous cells Radiation sensitivity YWHAZ gene Cell migration

Drug Nanorod-Mediated Intracellular Delivery of microRNA-101 for Self-sensitization via Autophagy Inhibition

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Nano-Micro Letters 2019年第4期11卷 453-468页

作者： xiaofei xin Xiaoqing Du Qingqing Xiao Helena SAzevedo Wei He Lifang Yin Department of Pharmaceutics School of PharmacyChina Pharmaceutical UniversityNanjing 210009People’s Republic of China School of Engineering and Materials Science Institute of BioengineeringQueen MaryUniversity of LondonLondon E14NSUK

Autophagy is closely related to the drug resistance and metastasis in cancer *** co-delivery of combinatorial therapy with small-molecular drugs and nucleic acids is promising to address drug ***,a drug-delivering-drug(DDD)platform consisting of anti-tumor-drug nanorods as a vehicle for cytosol delivery of nucleic acid(miR-101)with potent autophagic-inhibition activity is reported for combinatorial *** developed 180-nm nanoplatform,with total drug loading of up to 66%,delivers miR-101 to cancer cells,with threefold increase in intracellular level compared to conventional gene carriers and inhibits the autophagy significantly,along with above twofold reduction in LC3II mRNA and approximately fivefold increase in p62 mRNA over the control demonstrated in the results in *** in turn,the delivery of miR-101 potentiates the drug’s ability to kill cancer cells,with a threefold increase in apoptosis over that of chemotherapy *** anti-tumor study in vivo indicates the combined therapy that enables a reduction of 80%in tumor volume and>twofold increase in apoptosis than of the single-drug *** summary,via the carrier-free strategy of DDD,this work provides a delivery platform that can be easily customized to overcome drug resistance and facilitates the delivery of combined therapy of small-molecular drugs and nucleic acids.

关键词： Nanocrystals MicroRNA delivery Autophagy inhibition Cytotoxicity Combinatorial therapy

Distributed collaborative complete coverage path planning based on hybrid strategy

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Journal of Systems Engineering and Electronics 2024年第2期35卷 463-472页

作者： ZHANG Jia DU xin DONG Qichen xin Bin School of Automation Beijing Institute of TechnologyBeijing 100081China National Key Laboratory of Autonomous Intelligent Unmanned Systems Beijing Institute of TechnologyBeijing 100081China

Collaborative coverage path planning(CCPP) refers to obtaining the shortest paths passing over all places except obstacles in a certain area or space. A multi-unmanned aerial vehicle(UAV) collaborative CCPP algorithm is proposed for the urban rescue search or military search in outdoor *** to flexible control of small UAVs, it can be considered that all UAVs fly at the same altitude, that is, they perform search tasks on a two-dimensional plane. Based on the agents’ motion characteristics and environmental information, a mathematical model of CCPP problem is established. The minimum time for UAVs to complete the CCPP is the objective function, and complete coverage constraint, no-fly constraint, collision avoidance constraint, and communication constraint are considered. Four motion strategies and two communication strategies are designed. Then a distributed CCPP algorithm is designed based on hybrid strategies. Simulation results compared with patternbased genetic algorithm(PBGA) and random search method show that the proposed method has stronger real-time performance and better scalability and can complete the complete CCPP task more efficiently and stably.

关键词： multi-agent cooperation unmanned aerial vehicles(UAV) distributed algorithm complete coverage path planning(CCPP)

Simulation and evaluation study of atmospheric aerosol nonsphericity as a function of particle size

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Particuology 2024年第7期90卷 281-291页

作者： Qianjun Mao xin Nie School of Urban Construction Wuhan University of Science and TechnologyWuhan430065China College of New Energy and Materials Northeast Petroleum UniversityDaqing163318China

Aerosol nonsphericity causes great uncertainty in radiative forcing assessments and climate *** considerable studies have attempted to quantify this uncertainty,the relationship between aerosol nonsphericity and particle size is usually not considered,thus reducing the accuracy of the *** this study,a coupled inversion algorithm combining an improved stochastic particle swarm optimization algorithm and angular light scattering is used for the nonparametric estimation of aerosol nonsphericity variation with particle size,and the optimal sample selection method is employed to screen the *** on the verification of inversion accuracy,the variation of aerosol aspect ratio with particle size based on the ellipsoidal model in global regions has been obtained from Aerosol Robotic Network(AERONET)data,and the effect of nonsphericity on radiative forcing and dry deposition has been *** results show that the aspect ratio increases with particle size in all regions,with the maximum ranging from 1.4 to 1.8 in the desert,reflecting the differences in aerosol composition at different particle *** radiation calculations,considering aerosol nonsphericity makes the aerosol cooling effect weaker and surface radiative fluxes increase,but hardly changes the aerosol absorption,with maximum differences of 9.22%and 22.12%at the bottom and top of the atmosphere,***,the differences in radiative forcing between aspect ratios as a function of particle size and not varying with particle size are not significant,averaging less than 2%.Besides,the aspect ratio not varying with particle size underestimates the deposition velocity of small particles and overestimates that of large particles compared to that as a function of particle size,with maximum differences of 7%and 4%,respectively.

关键词： Aerosol nonsphericity Inversion Aspect ratio Radiative forcing Dry deposition velocity

Dominant woody plant species recognition with a hierarchical model based on multimodal geospatial data for subtropical forests

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Journal of Forestry Research 2024年第3期35卷 111-130页

作者： xin Chen Yujun Sun State Forestry&Grassland Administration Key Laboratory of Forest Resources&Environmental Management Beijing Forestry UniversityBeijing 100083People's Republic of China

Since the launch of the Google Earth Engine(GEE)cloud platform in 2010,it has been widely used,leading to a wealth of valuable ***,the potential of GEE for forest resource management has not been fully *** extract dominant woody plant species,GEE combined Sen-tinel-1(S1)and Sentinel-2(S2)data with the addition of the National Forest Resources Inventory(NFRI)and topographic data,resulting in a 10 m resolution multimodal geospatial dataset for subtropical forests in southeast *** and texture features,red-edge bands,and vegetation indices of S1 and S2 data were computed.A hierarchical model obtained information on forest distribution and area and the dominant woody plant *** results suggest that combining data sources from the S1 winter and S2 yearly ranges enhances accuracy in forest distribution and area extraction compared to using either data source ***,for dominant woody species recognition,using S1 winter and S2 data across all four seasons was *** terrain factors and removing spatial correlation from NFRI sample points further improved the recognition *** optimal forest extraction achieved an overall accuracy(OA)of 97.4%and a maplevel image classification efficacy(MICE)of 96.7%.OA and MICE were 83.6%and 80.7%for dominant species extraction,*** high accuracy and efficacy values indicate that the hierarchical recognition model based on multimodal remote sensing data performed extremely well for extracting information about dominant woody plant *** the results using the GEE application allows for an intuitive display of forest and species distribution,offering significant convenience for forest resource monitoring.

关键词： Google Earth Engine Sentinel Forest resource inventory data Dominant woody plant species Subtropics Model performance