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A drug-loaded composite coating to improve osteogenic and antibacterial properties of Zn-1Mg porous scaffolds as biodegradable bone implants

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Bioactive Materials 2023年第9期27卷 488-504页

作者： Zhenbao zhang Aobo liu Jiadong Fan Menglin wang Jiabao Dai Xiang Jin Huanze Deng Xuan wang Yijie Liang Haixia Li Yantao zhao peng Wen Yanfeng Li Department of Stomatology the Fourth Medical Center of PLA General HospitalBeijing100048China State Key Laboratory of Tribology in Advanced Equipment Beijing100084China Medical school of Chinese PLA Beijing100039China Department of Mechanical Engineering Tsinghua UniversityBeijing100084China Senior Department of Orthopedics the Fourth Medical Center of PLA General HospitalBeijing100048China Beijing Engineering Research Center of Orthopedics Implants Beijing100048China Institute of Process Engineering Chinese Academy of SciencesBeijing100190China

Zinc(Zn)alloy porous scaffolds produced by additive manufacturing own customizable structures and biodegradable functions,having a great application potential for repairing bone *** this work,a hydroxyapatite(HA)/polydopamine(PDA)composite coating was constructed on the surface of Zn-1Mg porous scaffolds fabricated by laser powder bed fusion,and was loaded with a bioactive factor BMP2 and an antibacterial drug *** microstructure,degradation behavior,biocompatibility,antibacterial performance and osteogenic activities were systematically *** with as-built Zn-1Mg scaffolds,the rapid increase of Zn2+,which resulted to the deteriorated cell viability and osteogenic differentiation,was inhibited due to the physical barrier of the composite *** vitro cellular and bacterial assay indicated that the loaded BMP2 and vancomycin considerably enhanced the cytocompatibility and antibacterial *** improved osteogenic and antibacterial functions were also observed according to in vivo implantation in the lateral femoral condyle of *** design,influence and mechanism of the composite coating were discussed *** was concluded that the additively manufactured Zn-1Mg porous scaffolds together with the composite coating could modulate biodegradable performance and contribute to effective promotion of bone recovery and antibacterial function.

关键词： Additive manufacturing Biodegradable metal Zn-Mg alloy Porous scaffold Composite coating Bone repair

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NaCl胁迫对海岛棉幼苗光合和荧光特性的影响

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中国农学通报 2018年第6期34卷 30-38页

作者：赵海燕王建设林兴刘震刘玉玲卢全伟王小艳张树林刘方彭仁海安阳工学院生物与食品工程学院河南安阳455000 中国农业科学院棉花研究所/棉花生物学国家重点实验室河南安阳455000

为了给海岛棉耐盐材料的选育、栽培管理提供理论依据,以‘越海9号’和‘PS-7’为材料,从发芽至三叶期进行盐胁迫,分析海岛棉生长指标、光合参数对盐处理的响应。结果表明,盐胁迫降低了海岛棉叶面积、叶绿素含量等生物量积累,提高了叶绿... 详细信息

为了给海岛棉耐盐材料的选育、栽培管理提供理论依据,以‘越海9号’和‘PS-7’为材料,从发芽至三叶期进行盐胁迫,分析海岛棉生长指标、光合参数对盐处理的响应。结果表明,盐胁迫降低了海岛棉叶面积、叶绿素含量等生物量积累,提高了叶绿素a/b值;提高了‘越海9号’的净光合速率(Pn)、光化学淬灭系数(qP)等光合荧光参数值,降低了非光化学猝灭系数(NPQ)等参数值;降低了‘PS-7’的Pn、qP等光合、荧光参数值,提高了NPQ等参数值。‘PS-7’的根/茎比值大于‘越海9号’,其余指标均小于‘越海9号’。盐胁迫抑制了海岛棉生长指标及叶绿素含量等生物量积累,对耐盐性弱的品系抑制程度大于耐盐性强的品系。

关键词：海岛棉苗期盐胁迫光合作用叶绿素荧光

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Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing

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National science Review 2020年第1期7卷 84-91页

作者： Cong liu Feng An Paria S.M.Gharavi Qinwen Lu Junkun Zha Chao Chen Liming wang Xiaozhi Zhan Zedong Xu Yuan zhang Ke Qu Junxiang Yao Yun Ou Zhiming zhao Xiangli zhong Dongwen zhang Nagarajan Valanoor Lang Chen Tao Zhu Deyang Chen Xiaofang Zhai peng Gao Tingting Jia Shuhong Xie Gaokuo zhong Jiangyu Li Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences school of Materials science and Engineering Xiangtan University school of Materials science and Engineering University of New South Wales Hefei National Laboratory for Physical sciences at Microscale and Department of Chemical Physics University of Science and Technology of China Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology South China Academy of Advanced Optoelectronics South China Normal University Dongguan Neutron science Center Department of Physics Southern University of Science and Technology International Center for Quantum Materials and Electron Microscopy Laboratory School of Physics Peking University Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment Hunan University of Science and Technology Department of Physics College of Science National University of Defense Technology Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Songshan Lake Materials Laboratory Dongguan Neutron Science Center

Complex oxides with tunable structures have many fascinating properties, though high-quality complex oxide epitaxy with precisely controlled composition is still out of reach. Here we have successfully developed solution-based single-crystalline epitaxy for multiferroic（1-x）BiTi;/;Fe;Mg;/;O;–（x）CaTiO;（BTFM–CTO） solid solution in large area, confirming its ferroelectricity at the atomic scale with strong spontaneous polarization. Careful compositional tuning leads to a bulk magnetization of 0.07 ± 0.035 μB/Fe at room temperature, enabling magnetically induced polarization switching exhibiting a large magnetoelectric coefficient of 2.7–3.0 × 10;s/m. This work demonstrates the great potential of solution processing in large-scale complex oxide epitaxy and establishes novel room-temperature magnetoelectric coupling in epitaxial BTFM–CTO film, making it possible to explore a much wider space of composition,phase, and structure that can be easily scaled up for industrial applications.

关键词： complex oxide solution method epitaxy multiferroic

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Antimalarial and neuroprotective ent-abietane diterpenoids from the aerial parts of Phlogacanthus curviflorus

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中国天然药物:英文版 2023年第8期21卷 619-630页

作者： LI Jia MENG Xiao YIN Chengyue zhang Lixia LIN Bin liu peng ZHU Lingjuan wang Haifeng liu Hongwei zhang Xue YAO Xinsheng school of Traditional Chinese Materia Medica Key Laboratory of Structure-Based Drug Design&Discovery of Ministry of EducationShenyang Pharmaceutical UniversityShenyang 110016China school of Pharmaceutical Engineering Shenyang Pharmaceutical UniversityShenyang 110016China school of Life science and Biopharmaceutics Shenyang Pharmaceutical UniversityShenyang 110016China State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China Institute of Traditional Chinese Medicine&Natural Products College of PharmacyJinan UniversityGuangzhou 510632China

Six new ent-abietane diterpenoids,abientaphlogatones A−F(1−6),along with two undescribed ent-abietane diterpenoid glucosides,abientaphlogasides A−B(7−8)and four known analogs were isolated from the aerial parts of Phlogacanthus curviflorus(***).The structures of these compounds were determined using high-resolution electrospray ionization mass spectrometry(HR-ESI-MS),one-dimensional and two-dimensional nuclear magnetic resonance(NMR)spectroscopy,electronic circular dichroism(ECD)spectra,and quantum chemical ***,compounds 5 and 6 represented the first reported instances of entnorabietane diterpenoids from the genus *** theβ-hematin formation inhibition assay,compounds 2,4,7−10,and 12 displayed antimalarial activity,with IC_(50) values of 12.97−65.01μmol·L−***,compounds 4,5,8,and 10 demonstrated neuroprotective activity in PC12 cell injury models induced by H_(2)O_(2) and MPP+.

关键词： Phlogacanthus curviflorus Acathaceae ent-Abietane diterpenoids Antimalarial activity Neuroprotective effect

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Calibration of the cryogenic measurement system of a resonant haloscope cavity

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Chinese Physics C 2024年第7期48卷 31-37页

作者：贺冬樊洁高昕高宇 Nick Houston 姬忠庆金贻荣李闯李金勉李田军刘世航牛家树彭智慧孙亮孙铮王佳卫镨先吴利娜相忠诚杨峤立张驰张文星张欣郑东宁郑瑞丰周建勇 Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Key Laboratory for Matter Microstructure and Function of Hunan ProvinceDepartment of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China Institute of Physics Chinese Academy of SciencesBeijing 100190China College of Physics Sichuan UniversityChengdu 610065China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Institute of Theoretical Physics Faculty of ScienceBeijing University of TechnologyBeijing 100124China Beijing Academy of Quantum Information sciences Beijing 100193China College of Mechanical and Electrical Engineering Wuyi UniversityNanping 354300China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China school of Physical sciences University of Chinese Academy of SciencesBeijing 100049China Institute of Theoretical Physics Shanxi UniversityTaiyuan 030006China College of Physics and Optoelectronic Engineering Department of PhysicsJinan UniversityGuangzhou 510632China school of sciences Xi'an Technological UniversityXi'an 710021China Tsung-Dao Lee Institute and school of Physics and Astronomy Shanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China National Astronomical Observatories Chinese Academy of Sciences20ADatun RoadChaoyang DistrictBeijing 100101China school of Astronomy and Space science University of Chinese Academy of SciencesBeijing 100049China

Possible light bosonic dark matter interactions with the Standard Model photon have been searched using microwave resonant *** this paper,we describe the cryogenic readout system calibration of a 7.138 GHz copper cavity with a loaded quality factor Q_(1)=10^(4)whose operation at a temperature of 22 mK is based on a dilution *** readout system consists of High Electron Mobility Transistors working as cryogenic amplifiers at 4 K,plus room-temperature amplifiers and a spectrum analyzer for signal power *** tested the system with a superconducting two-level system based on a single-photon source in the microwave frequency *** obtained an overall 95.6 dB system gain and–71.4 dB attenuation in the cavity's input *** effective noise temperature of the measurement system is 7.5 K.

关键词： dark matter superconducting two-level system Mollow triplet

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Ultrafast growth of large single crystals of monolayer WS2 and WSe2

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National science Review 2020年第4期7卷 737-744页

作者： Zhengwei zhang peng Chen Xiangdong Yang Yuan liu Huifang Ma Jia Li Bei zhao Jun Luo Xidong Duan Xiangfeng Duan State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Department of Applied Physics School of Physics and Electronics Hunan University Center for Electron Microscopy Institute for New Energy Materials and Low-Carbon Technologies School of Materials Tianjin University of Technology Department of Chemistry and Biochemistry University of California

Monolayer transition metal dichalcogenides（TMDs） have attracted considerable attention as atomically thin semiconductors for the ultimate transistor scaling. For practical applications in integrated electronics,large monolayer single crystals are essential for ensuring consistent electronic properties and high device yield. The TMDs available today are generally obtained by mechanical exfoliation or chemical vapor deposition（CVD） growth, but are often of mixed layer thickness, limited single crystal domain size or have very slow growth rate. Scalable and rapid growth of large single crystals of monolayer TMDs requires maximization of lateral growth rate while completely suppressing the vertical growth, which represents a fundamental synthetic challenge and has motivated considerable efforts. Herein we report a modified CVD approach with controllable reverse flow for rapid growth of large domain single crystals of monolayer TMDs. With the use of reverse flow to precisely control the chemical vapor supply in the thermal CVD process, we can effectively prevent undesired nucleation before reaching optimum growth temperature and enable rapid nucleation and growth of monolayer TMD single crystals at a high temperature that is difficult to attain with use of a typical thermal CVD process. We show that monolayer single crystals of 450 μm lateral size can be prepared in 10 s, with the highest lateral growth rate up to 45 μm/s. Electronic characterization shows that the resulting monolayer WSe2material exhibits excellent electronic properties with carrier mobility up to 90 cm2V-1s-1, comparable to that of the best exfoliated monolayers. Our study provides a robust pathway for rapid growth of high-quality TMD single crystals.

关键词： monolayer transition metal dichalcogenides large single crystal CVD ultrafast growth

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奇白消软膏的定性鉴别与定量检测

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中国民族民间医药 2024年第1期33卷 28-32页

作者：梁林辉章斌姚永秀彭东刘德军赵君雅安职业技术学院药学与检验学院四川雅安625000 雅安市食品药品应用开发工程技术研究中心四川雅安625000 雅安蒲源生物技术有限公司四川雅安625000 成都医学院药学院四川成都610000

目的:建立奇白消软膏的定性鉴别与含量测定方法,加强奇白消软膏的质量控制。方法:采用薄层色谱(TLC)法对制剂中的黄连和人工牛黄进行定性鉴别;采用高效液相色谱法(HPLC)测定制剂中黄连有效成分盐酸小檗碱的含量。结果:奇白消软膏的TLC... 详细信息

目的:建立奇白消软膏的定性鉴别与含量测定方法,加强奇白消软膏的质量控制。方法:采用薄层色谱(TLC)法对制剂中的黄连和人工牛黄进行定性鉴别;采用高效液相色谱法(HPLC)测定制剂中黄连有效成分盐酸小檗碱的含量。结果:奇白消软膏的TLC斑点清晰、阴性无干扰、分离度好;盐酸小檗碱在1.28~38.4μg;回归方程为Y=49873.84X-554.74(r=1)。精密度、稳定性、重复性试验的RSD分别为0.41%、0.38%、1.8%;加样回收率为98.88%~101.23%,RSD为0.95%(n=6)。结论:本研究建立的TLC和HPLC简便易行,准确、重复性好,可用于奇白消软膏的质量控制。

关键词：奇白消软膏盐酸小檗碱薄层色谱法高效液相色谱法质量控制

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One‑Step Gas-Solid‑Phase Diffusion‑Induced Elemental Reaction for Bandgap‑Tunable Cu_(a)Agm_(1)Bim_(2)I_(n)/CuI Thin Film Solar Cells

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Nano-Micro Letters 2023年第4期15卷 261-271页

作者： Erchuang Fan Manying liu Kangni Yang Siyu Jiang Bingxin Li Dandan zhao Yanru Guo Yange zhang peng zhang Chuantian Zuo Liming Ding Zhi Zheng Key Laboratory of Micro‑Nano Materials for Energy Storage and Conversion of Henan Province College of Chemical and Materials EngineeringInstitute of Surface Micro and Nano MaterialsXuchang UniversityXuchang 461000People’s Republic of China school of Materials science and Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190People’s Republic of China

Lead-free inorganic copper-silver-bismuth-halide materials have attracted more and more attention due to their environmental friendliness,high element abundance,and low ***,we developed a strategy of one-step gas-solid-phase diffusioninduced reaction to fabricate a series of bandgap-tunable Cu_(a)Agm_(1)Bim_(2)I_(n)/CuI bilayer films due to the atomic diffusion effect for the first *** designing and regulating the sputtered Cu/Ag/Bi metal film thickness,the bandgap of Cu_(a)Agm_(1)Bim_(2)I_(n)/CuI could be reduced from 2.06 to 1.78 *** cells with the structure of FTO/TiO_(2)/Cu_(a)Agm_(1)Bim_(2)I_(n)/CuI/carbon were constructed,yielding a champion power conversion efficiency of 2.76%,which is the highest reported for this class of materials owing to the bandgap reduction and the peculiar bilayer *** current work provides a practical path for developing the next generation of efficient,stable,and environmentally friendly photovoltaic materials.

关键词： Cu_(a)Agm_(1)Bim_(2)I_(n)/CuI Elemental reaction Bandgap tuning Solar cells Gas-solid phase

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Optimizing the grain size and grain boundary morphology of (K,Na) NbO_(3)-based ceramics: Paving the way for ultrahigh energy storage capacitors

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Journal of Materiomics 2021年第4期7卷 780-789页

作者： Xiaozhi wang Yu Huan Peiyao zhao Xiaoming liu Tao Wei Qiwen zhang Xiaohui wang school of Material science and Engineering University of JinanJinan250022China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang110819China The Chinese Ceramic Society Beijing100831China

Relaxor dielectric ceramic capacitors are very attractive for high-power energy ***,the low breakdown strength severely restricts improvements to the energy storage density and practical ***,a strategy of designing small grain sizes and abundant amorphous grain boundaries is proposed to improve the energy storage properties under the guidance of phase field theory.0.925(K_(0.5)Na_(0.5))NbO_(3)-e0.075Bi(Zn_(2/3)(Ta_(0.5)Nb_(0.5))1/3)O_(3)(KNNe-BZTN)relaxor ferroelectric ceramic is taken as an example to verify our *** grain sizes and grain boundaries of the KNNeBZTN ceramics are carefully controlled by the high-energy ball milling method and twoestep sintering *** analysis and diffusion reflectance spectra demonstrate that KNNeBZTN ceramics with a small grain size and abundant amorphous grain boundary exhibit a lower charge carrier concentration and higher band *** a consequence,the breakdown electric field of KNNeBZTN ceramics increases from 222 kV/cm to 317 kV/cm when the grain size is decreased from 410 nm to 200 nm,accompanied by a slightly degraded maximum *** ceramics with an average grain size of~250 nm and abundant amorphous grain boundaries exhibit optimum energy storage properties with a high recoverable energy density of 4.02 J/cm^(3) and a high energy efficiency of 87.4%.This successful local structural design opens up a new paradigm to improve the energy storage performance of other dielectric ceramic capacitors for electrical energy storage.

关键词： Grain size Grain boundary KNN-based dielectric ceramic capacitors Energy storage properties Breakdown strength Two-step sintering strategy

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Profoundly entwined ecosystem services,land-use change and human well-being into sustainability management in Yushu,Qinghai-Tibet Plateau

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Journal of Geographical sciences 2022年第9期32卷 1745-1765页

作者： liu Mengxue GAO Ya WEI Hejie DONG Xiaobin zhao Bingyu wang Xue-Chao zhang peng liu Ranran ZU Xinyu State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing100875China Beijing Normal university Beijing100875China College of Resources science and Technology Beijing Normal UniversityBeijing100875China College of Resources and Environmental sciences Henan Agricultural UniversityZhengzhou450002China school of Information Engineering China University of GeosciencesBeijing100083China

The nexus exploration among land use/land cover change,ecosystem services and human well-being has been increasingly crucial in the context of Future ***,the spatial heterogeneity and the entwining process among these three aspects have not yet been in-depth and systematically *** we identified the spatiotemporal pattern of ecosystem services during the past 20 years in Yushu,the eco-fragile region and the centre of Qinghai-Tibet Plateau,as well as clarified its relationships with land use change and human *** revealed that:(1)The structure of the ecosystem and land use in this area have been increasingly stable,and the ecological projects have exerted a positive impact.(2)Although the ecological environmental issues still need more attention,the ecosystem services of the area have been positively developing.(3)Derived by the ecosystem services increase,environmental projects and policies,the human well-beings of culture and education performed much better than other aspects.(4)It is crucial to carry out long-term ecological projects and increase educational investment for maintaining the stability of this ecologically fragile *** study provides significant support for the regional ecological sustainability decision making,especially for the Qinghai-Tibet Plateau,the roof of the world.

关键词： eco-fragile region Land use/land cover change ecosystem services human well-being Qinghai-Tibet Plateau

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