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Bioinspired mineral-in-shell nanoarchitectonics:Functional empowerment of mineral precursors for guiding intradentinal mineralization

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Nano Research 2024年第5期17卷 4338-4349页

作者： Xiaoran Zheng Yang liu Mingjing li Yuyan li Wanshan Gao Rongmin Qiu Jiaqi Xing Jiaojiao Yang Yantao Chen Xinyuan Xu Mingming Ding Jun Luo jianshu li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China College of Stomatology Hospital of Stomatology Guangxi Medical UniversityGuangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and ReconstructionGuangxi Clinical Research Center for Craniofacial DeformityGuangxi Key Laboratory of Oral and Maxillofacial Surgery Disease TreatmentGuangxi Health Commission Key Laboratory of Prevention and Treatment for Oral Infectious DiseasesNanning 530021China State Key Laboratory of Oral Diseases West China Hospital of StomatologySichuan UniversityChengdu 610041China Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China Med-X Center for Material Sichuan UniversityChengdu 610041China

Effective mineralization of biological structures poses a significant challenge in hard tissue engineering as it necessitates overcoming geometric complexities and multistep biomineralization *** this regard,we propose“mineral-in-shell nanoarchitectonics”,inspired by the nanostructure of matrix vesicles,which can influence multiple mineralization *** nanostructural design empowers mineral precursors with tailorable properties through encapsulating amorphous calcium phosphate within a multifunctional tannic acid(TA)and silk fibroin(SF)*** bioinspired nanosystem facilitates efficient recruitment of mineral precursors throughout the dentin structures,followed by large-scale intradentinal mineralization both in vitro and in vivo,which provides persistent protection against external *** simulations combined with experimental studies attribute the success of intradentinal mineralization to the TA-SF nanoshell,which exhibits a strong affinity for the dentin structure,stabilizing amorphous precursors and thereby facilitating concomitant mineral ***,this bioinspired mineral-in-shell nanoarchitectonics shows a promising prospect for hard tissue repair and serves as a blueprint for next-generation biomineralization-associated materials.

关键词： mineral-in-shell nanohybrids self-assembly biomineralization dentinal tubule occlusion dental hypersensitivity

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Finite Temperature Magnetism in the Triangular Lattice Antiferromagnet KErTe_(2)

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Chinese Physics Letters 2024年第9期41卷 140-150页

作者： Weiwei liu Zheng Zhang Dayu Yan jianshu li Zhitao Zhang Jianting Ji Feng Jin Youguo Shi Qingming Zhang Department of Physics Renmin University of ChinaBeijing 100872China Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field LaboratoryChinese Academy of SciencesHefei 230031China School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China

After the discovery of the ARECh2(A=alkali or monovalent ions,RE=rare-earth,Ch=chalcogen)triangular lattice quantum spin liquid(QSL)family,a series of its oxide,sulfide,and selenide counterparts has been consistently reported and extensively *** KErTe_(2) represents the initial synthesized telluride member,preserving its triangular spin lattice,it was anticipated that the substantial tellurium ions could impart more pronounced magnetic attributes and electronic structures to this material *** study delves into the magnetism of KErTe_(2) at finite temperatures through magnetization and electron spin resonance(ESR)*** on the angular momentum J after spin-orbit coupling(SOC)and symmetry analysis,we obtain the magnetic effective Hamiltonian to describe the magnetism of Er^(3+)in R3m space *** the mean-field approximation to the Hamiltonian,we can simulate the magnetization and magnetic heat capacity of KErTe_(2) in paramagnetic state and determine the crystalline electric field(CEF)parameters and partial exchange *** relatively narrow energy gaps between the CEF ground state and excited states exert a significant influence on the *** example,small CEF excitations can result in a significant broadening of the ESR linewidth at 2 *** the fitted exchange interactions,although the values are small,given a large angular momentum J=15/2 after SOC,they still have a noticeable effect at finite ***,the heat capacity data under different magnetic fields along the𝑐axis direction also roughly match our calculated results,further validating the reliability of our analytical *** derived parameters serve as crucial tools for future investigations into the ground state magnetism of KErTe_(2).The findings presented herein lay a foundation for exploration of the intricate magnetism within the triangular-lattice delafossite family.

关键词： triangular Hamiltonian magnetization

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Polymer Fiber Rigid Network with High Glass Transition Temperature Reinforces Stability of Organic Photovoltaics

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Nano-Micro Letters 2024年第11期16卷 56-69页

作者： Qiao Zhou Cenqi Yan Hongxiang li Zhendong Zhu Yujie Gao Jie Xiong Hua Tang Can Zhu Hailin Yu Sandra P.Gonzalez Lopez Jiayu Wang Meng Qin jianshu li Longbo Luo Xiangyang liu Jiaqiang Qin Shirong Lu Lei Meng Frédéric Laquai Yongfang li Pei Cheng College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065People’s Republic of China KAUST Solar Center Physical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)ThuwalKingdom of Saudi Arabia Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China Department of Material Science and Technology Taizhou UniversityTaizhou 318000People’s Republic of China

Organic photovoltaics(OPVs)need to overcome limitations such as insufficient thermal stability to be *** reported approaches to improve stability either rely on the development of new materials or on tailoring the donor/acceptor morphology,however,exhibiting limited ***,it is timely to develop an easy method to enhance thermal stability without having to develop new donor/acceptor materials or donor–acceptor compatibilizers,or by introducing another third ***,a unique approach is presented,based on constructing a polymer fiber rigid network with a high glass transition temperature(T_(g))to impede the movement of acceptor and donor molecules,to immobilize the active layer morphology,and thereby to improve thermal stability.A high-T_(g) one-dimensional aramid nanofiber(ANF)is utilized for network *** OPVs with ANF network yield superior thermal stability compared to the ANF-free *** ANF network-incorporated active layer demonstrates significantly more stable morphology than the ANF-free counterpart,thereby leaving fundamental processes such as charge separation,transport,and collection,determining the device efficiency,largely *** strategy is also successfully applied to other photovoltaic *** strategy of incorporating a polymer fiber rigid network with high T_(g) offers a distinct perspective addressing the challenge of thermal instability with simplicity and universality.

关键词： Inverted organic photovoltaics Thermal stability Aramid nanofibers Morphology control Charge carrier dynamics

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The Experimental Study on Regenerative Heat Transfer in High Temperature Air Combustion

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Journal of Thermal Science 2004年第4期13卷 366-370页

作者： li JIA jianshu li Department of Power Engineering School of MechanicalElectronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Beijing Institute of Civil Engineering&Architecture Beijing 100044China

For the purpose of decomposing the processing gases CF4 from semiconductor manufacturers, ceramic honeycomb regenerative burner system is suggested by using the principle of HTAC. A simulated high temperature air combustion furnace has been used to determine the features of HTAC flames and the results of the decomposition of CF4. The preheat air temperature of it is above 900℃. The exhaust gas released into the atmosphere is lower than 150℃. Moreover, the efficiency of recovery of waste heat is higher than 80%, the NOx level in exhaust gas is less than 198 mg/m3 and the distribution of temperature in the furnace is nearly uniform. The factors influencing on heat transfer, temperature profile in chamber and NOX emission were discussed. Also some CF4 can be decomposed in this system.

关键词： generator heat transfer high temperature air combustion NOX emission.

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国际绅士化实践及其研究进程、特征与展望

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现代城市研究 2024年第9期39卷 124-132页

作者：刘风豹余思奇李建树操小晋南京信息工程大学艺术学院南京林业大学风景园林学院山东省自然资源厅南华大学建筑与设计艺术学院

绅士化是国际上多学科关注的前沿问题。研究主要采用文献计量分析方法,以揭示国际绅士化实践及其研究进程与特征。结果表明:(1)国际绅士化实践由第一波绅士化浪潮转入第五波绅士化浪潮后,因受全球性新型冠状病毒感染疫情的影响而再次进... 详细信息

绅士化是国际上多学科关注的前沿问题。研究主要采用文献计量分析方法,以揭示国际绅士化实践及其研究进程与特征。结果表明:(1)国际绅士化实践由第一波绅士化浪潮转入第五波绅士化浪潮后,因受全球性新型冠状病毒感染疫情的影响而再次进入调整期;与之相伴随的是,国际绅士化研究在先后经历了概念形成阶段、萌芽起步阶段、波动探索阶段、初步发展阶段、快速发展阶段后,几乎同步进入调整期。(2)国际绅士化研究由国外学术期刊引领,并表现出明显的地理学、城市研究、环境研究、区域与城市规划等学科属性。(3)西方发达国家走在国际绅士化研究的前列,而近年来中国逐渐成为推动国际绅士化研究发展的新兴力量。(4)在国际绅士化研究领域,多个合作团队已初步形成,部分国内学者将研究成果推向世界。研究最后提出了未来绅士化研究应关注的重点。

关键词：绅士化城市更新社会空间中产阶层文献计量

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Antibacterial Nanoparticles with Universal Adhesion Function Based on Dopamine and Eugenol

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Journal of Bioresources and Bioproducts 2019年第3期4卷 43-48页

作者： Huilin XU Dongyue ZHANG jianshu li College of Polymer Science and Engineering Sichuan UniversityChengdu 610065China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065China

In this work,dopamine methacrylamide(DMA)and eugenyl methacrylate(EMA)were used to synthesize polymeric particles of Poly(DMA-co-EMA)by free radical precipitation *** two monomers were modified from dopamine(consisting of the catechol moieties adhering to various materials)and eugenol(with antibacterial property),*** proton nuclear magnetic resonance(^(1)H NMR)and Fourier transform infrared(FT-IR)spectroscopy were applied to confirm the successful synthesis of the two monomers and *** scanning electron microscope(SEM)images showed the size and morphology of the polymer *** results indicated that regular particles with uniform size could be obtained with a monomer feeding ratio of 5꞉*** results of antibacterial activity test indicated that the obtained polymer particles have an antibacterial rate over 90%to Eugenia coli.

关键词： antibacterial universal adhesion particle,precipitation polymerization

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Advances in biomineralization-inspired materials for hard tissue repair

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International Journal of Oral Science 2021年第4期13卷 345-369页

作者： Shuxian Tang Zhiyun Dong Xiang Ke Jun Luo jianshu li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengduChina Med-X Center for Materials Sichuan UniversityChengduChina

Biomineralization is the process by which organisms form mineralized tissues with hierarchical structures and excellent properties,including the bones and teeth in *** underlying mechanisms and pathways of biomineralization provide inspiration for designing and constructing materials to repair hard *** particular,the formation processes of minerals can be partly replicated by utilizing bioinspired artificial materials to mimic the functions of biomolecules or stabilize intermediate mineral phases involved in ***,we review recent advances in biomineralization-inspired materials developed for hard tissue ***-inspired materials are categorized into different types based on their specific applications,which include bone repair,dentin remineralization,and enamel ***,the advantages and limitations of these materials are summarized,and several perspectives on future directions are discussed.

关键词： utilizing limitations summarized

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Two-in-one strategy:a remineralizing and anti-adhesive coating against demineralized enamel

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International Journal of Oral Science 2020年第3期12卷 258-268页

作者： Ailin Hou Jun Luo Min Zhang jianshu li Wenlin Chu Kunneng liang Jiaojiao Yang Jiyao li State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases&Department of Cariology and Endodontics West China Hospital of StomatologySichuan UniversityChengduChina College of Polymer Science and Engineering Sichuan UniversityChengduChina College of Polymer Science and Engineering&State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengduChina State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases West China Hospital of StomatologySichuan UniversityChengduChina

Tooth enamel is prone to be attacked by injurious factors,leading to a de/remineralization *** repair demineralized enamel and prevent pulp inflammation caused by biofilm accumulation,measures are needed to promote remineralization and inhibit bacterial adhesion on the tooth *** innovative material,poly(aspartic acid)-polyethylene glycol(PASP-PEG),was designed and synthesized to construct a mineralizing and anti-adhesive surface that could be applied to repair demineralized enamel.A cytotoxicity assay revealed the low cytotoxicity of synthesized *** results demonstrated that PASPPEG possesses a high binding affinity to the hydroxyapatite(HA)/tooth *** vitro experiments and scanning electron microscopy(SEM)demonstrated a strong capacity of PASP-PEG to induce in situ remineralization and direct the oriented growth of apatite *** dispersive X-ray spectroscopy(EDS),X-ray diffraction analysis(XRD)and Vickers hardness tests demonstrated that minerals induced by PASP-PEG were consistent with healthy enamel in Ca/P ratio,crystal form and surface *** angle tests and bacterial adhesion experiments demonstrated that PASP-PEG yielded a strong antiadhesive *** summary,PASP-PEG could achieve dual effects for enamel repair and anti-adhesion of bacteria,thereby widening its application in enamel repair.

关键词： coating thereby Adsorption

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Ectopic mineralization-inspired cell membrane-based matrix vesicle analogs for in-depth remineralization of dentinal tubules for treating dentin hypersensitivity

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Nano Research 2023年第5期16卷 7269-7279页

作者： Mingjing li Xiaoran Zheng Zhiyun Dong Yuyue Zhang Wei Wu Xingyu Chen Chunmei Ding Jiaojiao Yang Jun Luo jianshu li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China Key Laboratory for Biorheological Science and Technology of Ministry of Education State and Local Joint Engineering Laboratory for Vascular Implants Bioengineering College of Chongqing UniversityChongqing 400030China College of Medicine Southwest Jiaotong UniversityChengdu 610003China State Key Laboratory of Oral Diseases West China Hospital of Stomatology and Med-X Center for MaterialSichuan UniversityChengdu 610041China Med-X Center for Material Sichuan UniversityChengdu 610041China

The invasion of etched dentinal tubules(DTs)by external substances induces dentin hypersensitivity(DH).The deep and compact occlusion of DTs is highly desirable for treating DH but still challenging due to the limited penetrability and mineralization capacities of most current *** vesicles(MVs)participate in the regulation of ectopic ***,ectopic MV analogs are prepared by employing natural cell membranes to endow mineral precursors with natural biointerfaces and integrated biofunctions for stimulating dentin *** analogs quickly access DTs(>20μm)in only 5 min and further penetrate deep into the interior of DTs(an extraordinary~200μm)in 7 *** in vitro and in vivo studies confirm that the DTs are efficiently sealed by the newly formed minerals(>50μm)with excellent resistance to wear and acid erosion,which is significantly deeper than most reported *** repair,the microhardness of the damaged dentin can be recovered to those of healthy *** the first time,cell membrane coating nanotechnology is used as a facile and efficient therapy for in-depth remineralization of DTs in treating DH with thorough and long-term effects,which provides insights into their potential for hard tissue repair.

关键词： bioinspiration dentin remineralization cell membrane coating nanotechnology ectopic matrix vesicles mineral precursors

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基于小波变换和长短期记忆神经网络的电力负荷预测

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宁夏电力 2024年第2期 33-39,45页

作者：叶梁劲廖晓辉李建树刘思佳郑州大学电气与信息工程学院河南郑州450001 国网河南省电力公司郑州供电公司河南郑州450001

电力系统需要保持发电功率与用电负荷的即时平衡,而电力负荷具有非线性、时变性和不确定性等特点。针对此问题,考虑天气与日期类型的影响,构建小波变换(wavelet transform,WT)和长短期记忆(long short-term memory,LSTM)神经网络组合预... 详细信息

电力系统需要保持发电功率与用电负荷的即时平衡,而电力负荷具有非线性、时变性和不确定性等特点。针对此问题,考虑天气与日期类型的影响,构建小波变换(wavelet transform,WT)和长短期记忆(long short-term memory,LSTM)神经网络组合预测模型,对电力负荷进行短期电力负荷预测。首先,用小波变换对数据集进行特征提取、信号去噪,消除数据的波动性;其次,将预处理后的数据利用LSTM进行训练,将输出结果进行序列重构;最后,进行负荷预测,WT-LSTM组合预测模型分别与BP神经网络预测模型和LSTM预测模型进行对比数据。结果表明,WT-LSTM神经网络组合预测模型的预测效果最好,有效地提高了预测精度。

关键词：小波变换长短期记忆神经网络负荷预测电力系统预测效果

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