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Polarized imaging dynamic light scattering for simultaneous measurement of nanoparticle size and morphology

Particuology 2024年第2期85卷 213-223页

作者： bingyao wang Tianyi Cai Xiaoshu Cai Wu Zhou Zeqi Liu Schoolof Energy and Power Engineering University of Shanghai for Science and TechnologyShanghai200093China Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering Shanghai200093China Jiaxing MeaParTech Instrument Technology Co. LtdZhejiang314000China

The performance of nanoparticles is often affected by particle size and ***,electron microscopy or atomic force microscopy is typically utilized to determine the size and morphology of ***,there are issues such as difficult sample preparation,long processing times,and challenges in quantitative ***,it is of great significance to develop a fast,accu-rate,and statistical method to measure the size and morphology of *** this study,a new method,called polarized imaging dynamic light scattering(PIDLS),is *** nanoparticles are irradiated with a vertical linearly polarized laser beam,and a polarization camera collected the dynamic light scattering images of particles at four different polarization directions(0°,45°,90°,and 135°)at a scattering angle of 90°.The average particle size and distribution are obtained using the imaging dy-namic light scattering method at 0°polarization direction,and the morphology of the particles is ob-tained based on the depolarization patterns of the scattered *** optical sphericityΦis defined based on the degree of linear polarization(DoLP).It is also implemented for the quantitative evaluation of the sphericity of the nanoparticles,including spherical,octahedral,nanoplate,nanorod,and linear *** with the Poincarésphere parameterψ,the morphology of the nanoparticles can be roughly *** addition,PIDLS enables the measurement of particle size and morphology distributions simultaneously for evaluating the uniformity of *** effectiveness of PIDLS is verified by the measurement of five kinds of industrial titanium dioxide as well.

关键词： Imaging dynamic light scattering Polarized light scattering Non-spherical nanoparticles Morphology Online measurement

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Variation of soil physical-chemical characteristics in salt-affected soil in the Qarhan Salt Lake,Qaidam Basin

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Journal of Arid Land 2022年第3期14卷 341-355页

作者： HUI Rong TAN Huijuan LI Xinrong wang bingyao Shapotou Desert Research and Experiment Station Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China

Soil salinization has adverse effects on the soil physical-chemical ***,little is known about the changes in soil salt ion concentrations and other soil physical-chemical characteristics within the Qarhan Salt Lake and at different soil depths in the surrounding ***,we selected five sampling sites(S1,S2,S3,S4,and S5)alongside the Qarhan Salt Lake and in the Xidatan segment of the Kunlun Mountains to investigate the relationship among soil salt ion concentrations,soil physical-chemical characteristics,and environmental variables in April *** results indicated that most sites had strongly saline and very strongly saline *** main salt ions present in the soil were Na^(+),K^(+),and Cl^(-).Soil nutrients and soil microbial biomass(SMB)were significantly affected by the salinity(P<0.05).Moreover,soil salt ions(Na^(+),K^(+),Ca2+,Mg^(2+),Cl^(-),CO_(3)^(2-),SO_(4)^(2-),and HCO_(3)^(-))were positively correlated with electrical conductivity(EC)and soil water content(SWC),but negatively related to altitude and soil *** soil salt ions,soil nutrients and SMB were positively correlated with altitude,but negatively related to EC and ***,soil nutrients and SMB were negatively correlated with soil salt *** conclusion,soil nutrients and SMB were mainly influenced by salinity,and were related to altitude,soil depth,and SWC in the areas from the Qarhan Salt Lake to the Xidatan *** results imply that the soil quality(mainly evaluated by soil physical-chemical characteristics)is mainly influenced by soil salt ions in the areas surrounding the Qarhan Salt *** results provide an accurate prediction of how the soil salt ions,soil nutrients,and SMB respond to the changes along a salt *** underlying mechanisms controlling the soil salt ion distribution,soil nutrients,and SMB in an extremely arid desert climate playa should be studied in greater detail in the future.

关键词： salinization soil salt ions soil physical-chemical characteristics soil microbial biomass soil nutrient Qarhan Salt Lake

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Oomycetes and fungi:important parasites on marine algae

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Acta Oceanologica Sinica 2010年第5期29卷 74-81页

作者： LI Wei ZHANG Tianyu TANG Xuexi wang bingyao College of Marine Life Science Ocean University of China Qingdao 266003 China College of Plant Protection Shandong Agricultural University Taian 271018 China

Considering that the field is largely unexplored and its importance to aquaculture,outline of oomycetes and fungi parasiting on marine algae was provided in this paper,including 15 species of oomycetes,six species of chytrids,31 Ascomycota species and one species of mitosporic *** natrue,both the oomycetes and chytrids frequently occurred and induced prevalences of disease which could destroy the populations of host plants ***,the parasites in Ascomycota on algae have never occurred as epidemics so *** issues relating to the field were discussed such as performing tests to satisfy Koch＇s postulates,investigations of host specificity,interactions between host and parasite and the potential effects of environmental factors on occurrence of a disease,which are urgent in need of further investigations.

关键词： oomycetes fungi parasites marine algae

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Response of revegetation to climate change with meso- and micro-scale remote sensing in an arid desert of China

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Research in Cold and Arid Regions 2021年第1期13卷 43-52页

作者： Guang Song bingyao wang JingYao Sun YanLi wang XinRong Li Shapotou Desert Research and Experimental Station Northwest Institute of Eco-Environment and ResourcesChinese Academy of ScienceLanzhouGansu 730000China Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China University of Chinese Academy of Sciences Beijing 100049China

The revegetation protection system(VPS)on the edge of the Tengger Desert can be referred to as a successful model of sand control technology in China and even the world,and there has been a substantial amount of research on revegetation ***,it is unclear how meso-and micro-scale revegetation activity has responded to climatic change over the past *** evaluate the relative influence of climatic variables on revegetation activities in a restored desert ecosystem,we analysed the trend of revegetation change from 2002 to 2015 using a satellite-derived normalized difference vegetation index(NDVI)*** time series of the NDVI data were decomposed into trend,seasonal,and random components using a segmented regression *** results of the segmented regression model indicate a changing trend in the NDVI in the VPS,changing from a decrease(−7×10−3/month)before 2005 to an increase(0.3×10−3/month)after *** found that precipitation was the most important climatic factor influencing the growing season NDVI(P<0.05),while vegetation growth sensitivity to water and heat varied significantly in different *** the case of precipitation reduction and warming in the study area,the NDVI of the VPS could still maintain an overall slow upward trend(0.04×10−3/month),indicating that the ecosystem is *** findings suggest that the VPS has been successful in maintaining stability and sustainability under current climate change conditions and that it is possible to introduce the VPS in similar areas as a template for resistance to sand and drought hazards.

关键词： vegetation activity climate change NDVI trend restored ecosystem meso-and micro-scale

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Photostable lysosomal imaging of living cell with hyperspectral stimulated Raman scattering microscopy using a probe based on bisarylbutadiyne

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Chinese Chemical Letters 2019年第7期30卷 1393-1396页

作者： Cong Ding Yage Chen Haozheng Li bingyao wang Qi Wei Huajun Tang Shaokang Jia Zhiyong He Ping wang Xiang Zhou College of Chemistry and Molecular Sciences Key Laboratory of Biomedical Polymers of the Ministry of Education WuhanUniversity Wuhan 430072 China Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China MoE Key Laboratory for Biomedical Photonics Collaborative Innovation Center for Biomedical Engineering School of Engineering Sciences Huazhong University of Science and Technology Wuhan 430074 China

We designed a lysosome-selective Raman probe by conjugating bisphenylbutadiyne with morpholine, a well-known lysosome targeting moiety. This probe, named Lyso-BADY, has a Raman peak 28 times more intense than that of 5-ethynyl-2'-deoxyuridine. Lysosome in living cells was successfully visualized by hyperspectral stimulated Raman scattering (SRS) microscopy with this extracellular probe. Further study showed that the Raman signal of Lyso-BADY remained steady and strong even after a prolonged irradiation time. The photo-stability feature of Lyso-BADY rendered molecules of the similar structure as potentially versatile probe for continuous imaging in the future.

关键词： Raman probe SRS Cell imaging Photo-stability feature

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A Privacy-Preserving TPA-aided Remote Data Integrity Auditing Scheme in Clouds

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国际计算机前沿大会会议论文集 2019年第1期 342-345页

作者： Meng Zhao Yong Ding Yujue wang Huiyong wang bingyao wang Lingang Liu School of Mechanical and Electrical Engineering Guilin University of Electronic Technology Guilin 541004 China Guangxi Key Laboratory of Cryptography and Information Security School of Computer Science and Information Security Guilin University of Electronic Technology Guilin 541004 China School of Mathematics and Computing Science Guilin University of Electronic Technology Guilin 541004 China

The remote data integrity auditing technology can guarantee the integrity of outsourced data in clouds. Users can periodically run an integrity auditing protocol by interacting with cloud server, to verify the latest status of outsourced data. Integrity auditing requires user to take massive time-consuming computations, which would not be affordable by weak devices. In this paper, we propose a privacy-preserving TPA-aided remote data integrity auditing scheme based on Li et al.’s data integrity auditing scheme without bilinear pairings, where a third party auditor (TPA) is employed to perform integrity auditing on outsourced data for users. The privacy of outsourced data can be guaranteed against TPA in the sense that TPA could not infer its contents from the returned proofs in the integrity auditing phase. Our construction is as efficient as Li et al.’s scheme, that is, each procedure takes the same time-consuming operations in both schemes, and our solution does not increase the sizes of processed data, challenge and proof.

关键词： Cloud storage Integrity auditing Provable Data Possession Proofs of Storage Proofs of Retrievability

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可重构柔索并联机器人协同避障方法研究

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仪器仪表学报 2017年第3期38卷 593-601页

作者：訾斌王炳尧刘浩钱森合肥工业大学机械工程学院合肥230009

针对可重构索驱动机器人自身结构与环境障碍物间高碰撞风险问题,设计了一种基于临界支撑线及多指抓握的可重构柔索机器人协同避障方法。通过简化环境障碍物与机器人结构得到一类可重构柔索机器人在复杂环境下的一般模型,在此模型基础上... 详细信息

针对可重构索驱动机器人自身结构与环境障碍物间高碰撞风险问题,设计了一种基于临界支撑线及多指抓握的可重构柔索机器人协同避障方法。通过简化环境障碍物与机器人结构得到一类可重构柔索机器人在复杂环境下的一般模型,在此模型基础上利用其结构的拓扑约束及障碍物间的临界支撑线求取机器人的无碰撞运动区域;通过凸包算法及凸包映射算法求取不同构型及障碍物分布下可重构柔索并联机器人的力封闭工作空间,并分析不同构型及障碍物分布对机器人无碰撞力封闭工作空间的影响;随后,通过优化算法求取指定运动轨迹上最优索分布;最后在重构索驱动机器人实验平台对所得优化结果进行验证。实验结果显示,所设计的可重构柔索机器人协同避障方法能有效避免重构索驱动机器人运动过程中的碰撞。

关键词：可重构柔索并联机器人协同避障力封闭工作空间多指抓握最优索力分布

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The Effect of Rotation on the Dynamic Response of a Generalized Piezoelectric-thermoelastic Problem

The Effect of Rotation on the Dynamic Response of a Generali...

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第四届国际机械工程与力学会议

作者： Shuanhu SHI Huimin LI bingyao wang Tianhu HE School of Science Lanzhou University of Technology

The dynamic response of a thick piezoelectric plate subject to strip-like thermal shock on both surfaces is investigated. The piezoelectric plate rotates around a fixed axis with constant angular velocity, and the generalized thermoelasticity with thermal relaxation is applied to formulating such problem. The governing equations considering the rotation effect are derived and numerically solved by means of finite element method. The distributions of dimensionless temperature, stress, displacement and electric potential are illustrated. The results show that the direct finite element method provides an effective way for achieving high calculation precision in solving the generalized piezoelectric-thermoelastic problem. The results also show that the rotation effect tends to decrease the dimensionless displacement and electric potential and barely affects the dimensionless temperature and stress.

关键词： Generalized thermoelastic theory Piezoelectric plate Rotation effect Finite element method Thermal relaxation

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莪术及其主要成分的药理作用研究进展

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药物评价研究 2022年第10期45卷 2154-2160页

作者：魏巍王冰瑶盈科瑞(天津)创新医药研究有限公司天津300382 天津中医药大学天津301607

莪术是传统中药,具有行气破血、消积止痛的功效。莪术所含化学成分众多,挥发油类和姜黄素类等化合物为其主要活性成分。现代药理研究表明莪术具有抗肿瘤、心脑血管系统保护、免疫调节、保肝、镇痛抗炎、抗病毒、抑菌、降血糖、抗氧化等... 详细信息

莪术是传统中药,具有行气破血、消积止痛的功效。莪术所含化学成分众多,挥发油类和姜黄素类等化合物为其主要活性成分。现代药理研究表明莪术具有抗肿瘤、心脑血管系统保护、免疫调节、保肝、镇痛抗炎、抗病毒、抑菌、降血糖、抗氧化等作用。通过查阅整理近年来国内外有关莪术化学成分研究和药理活性研究文献,对其主要药理作用等进行了综述,以期为莪术的药物开发及临床应用提供依据。

关键词：莪术挥发油姜黄素药理作用抗肿瘤保肝

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锂金属电池用复合固体电解质及其界面研究进展

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硅酸盐学报 2021年第7期49卷 1263-1277页

作者：王国需刘洪梁宇皓王秉尧范丽珍北京科技大学新材料技术研究院北京100083

相比于液态锂电池,固态锂金属电池由于电解质不易燃、不挥发而具有更高的安全性。此外,固态电解质能够有效抑制锂枝晶的生长,使基于高能量密度的锂金属作为负极材料成为可能。但是,固态锂金属电池存在着界面阻抗大、固体电解质/电极兼... 详细信息

相比于液态锂电池,固态锂金属电池由于电解质不易燃、不挥发而具有更高的安全性。此外,固态电解质能够有效抑制锂枝晶的生长,使基于高能量密度的锂金属作为负极材料成为可能。但是,固态锂金属电池存在着界面阻抗大、固体电解质/电极兼容性差、电解质离子电导率低及电化学窗口较窄等问题。因此,开发高性能的柔性固体电解质对推动固态锂金属电池的发展起着重要作用。本工作总结了固态锂金属电池中聚合物与不同类型填料复合最新研究进展及复合固体电解质匹配电极材料时存在的界面阻抗大问题与解决策略。

关键词：固态锂金属电池复合固体电解质填料界面

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