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| 1 | Effect of Yb^(3+) concentration on the structures and upconversion luminescence properties of Y_2O_3:Er^(3+) ultrafine phosphors显示文摘Y2O3:Er3+ ultrafine phosphors with a varying Yb3+ ion concentration were prepared by a urea homogeneous precipitation method. The results of XRD show that all the samples are of a pure cubic structure and the average crystallite sizes can be calculated as 45, 34, and 28 nm for Y2O3:Er3+ ultrafine phosphors with Yb3+ ion concentrations of 0, 10%, and 20%, respec- tively. The lattice constant and cell volume of the ultrafine phosphors decrease with enhancing Yb3+ ion concentration. The upconversion luminescence spectra of all the samples were studied under 980 nm laser excitation. The strong green and red upconversion emission were observed, and attributed to the 2H11/2 → 4I15/2, 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2 transitions of Er3+, respectively. The intensity of red emission increases with increasing Yb3+ ion concentration. The effect of Yb3+ ion concentra- tion on the structures and upconversion luminescence mechanism were discussed. | ZHANG Yongming LI Yanhong ZHANG Yang HONG Guangyan YU Yingning | 2008 | Rare Metals2008，27，6： | 4 |
| 2 | Biomaterial–Related Cell Microenvironment in Tissue Engineering and Regenerative Medicine显示文摘An appropriate cell microenvironment is key to tissue engineering and regenerative medicine.Revealing the factors that influence the cell microenvironment is a fundamental research topic in the fields of cell biology,biomaterials,tissue engineering,and regenerative medicine.The cell microenvironment consists of not only its surrounding cells and soluble factors,but also its extracellular matrix(ECM)or nearby external biomaterials in tissue engineering and regeneration.This review focuses on six aspects of bioma-terial-related cell microenvironments:①chemical composition of materials,②material dimensions and architecture,③material-controlled cell geometry,④effects of material charges on cells,⑤matrix stiff-ness and biomechanical microenvironment,and⑥surface modification of materials.The present chal-lenges in tissue engineering are also mentioned,and eight perspectives are predicted. | Jingming Gao Xiaoye Yu Xinlei Wang Yingning He Jiandong Ding | 2022 | Engineering2022，8，6： | 3 |
| 3 | Radon-Fourier trans- form for radar target detection (I) : generalized Doppler fil- ter bank 显示文摘 | Xu Jia Yu Ji Peng Yingning | 2011 | IEEE Transactions on Aerospace and Electron- ic Systems2011，47，2： | 1 |
| 4 | Radon-Fourier trans- form (RFF) for radar target detection (II) : performance a-nalysis and sidelobe suppression显示文摘 | Xu Jia Yu Ji Peng Yingning | 2011 | IEEE Transactions on Aerospace and Electronic Systems2011，47，4： | 1 |
| 5 | Joint estimation of Doppler centroid and rate for SAR with large range migration 显示文摘 | YU Mingcheng XU Jia PENG Yingning | 2007 | Radar Sonar g~ Navigation IET2007，1，3： | 1 |
| 6 | Radon-Fourier trans- form (RFr) for radar target detection (III) : optimality and fast implementations 显示文摘 | Yu Ji Xu Jia Peng Yingning | 2012 | IEEE Transactions on Aerospace and Electronic Systems2012，48，2： | 1 |
| 7 | SAR PRF- ambiguity resolving by range diversity 显示文摘 | YU Mingcheng XU Jia PENG Yingning | 2005 | Electronics Letters2005，41，22： | 1 |
| 8 | Radon-fourier trans- form for radar target detection, I : generalized Doppler filter bank显示文摘 | Xu Jia Yu Ji Peng Yingning | 2011 | IEEE Transactions on Aerospace and Electronic Systems2011，47，2： | 1 |
| 9 | Photoluminescenee properties and analysis of spectral structure of Eu3+-doped SrY2O4显示文摘 | FU ZUOLING ZHOU SHIHONG YU YINGNING | 2005 | J Phys Chem B2005，109，23： | 1 |
| 10 | Preparation of long-lastlng phosphorescence (LLP) glass-ceramic materials 显示文摘 | Li Chengyu Wang Shubin Yu Yingning | 2004 | Journal of Rare Earths2004，22，1： | 1 |
| 11 | R-adon-Fourier transform for radar target detection, Ⅲ : optimality and last implementations显示文摘 | Xu Jia Yu Ji Peng Yingning | 2012 | IEEE Transactions on Aerospace and Electronic Systems2012，48，2： | 1 |
| 12 | Radon-Fou- rier Transform for Radar Target Detection(I) :Gener'- alized Doppler Filter Bank显示文摘 | XU Jia YU Ji PENG Yingning | 2011 | IEEE Trans on Aero- space and Electronic Systems2011，47，2： | 1 |
| 13 | Joint estimation of Doppler centroid and rate for SAR with large range migration 显示文摘 | YU Mingcheng XU Jia PENG Yingning | 2007 | IET Radar Sonar & Navigation2007，1，3： | 1 |
| 14 | Radon-Fou- rier Transform for Radar Target Detection(11):Blind Speed Sidelobe Suppression显示文摘 | XU Jia YU Ji PENG Yingning | 2011 | IEEE Trans on Aero- space and Electronic Systems2011，47，4： | 1 |
| 15 | Radon-Fou- rier Transform for Radar Target Detection(III) : Opti- mality and Fast Implementations显示文摘 | YU Ji XU Jia PENG Yingning | 2012 | IEEE Trans on Aerospace and Electronic Systems2012，48，2： | 1 |
| 16 | Engineering of hollow polymeric nanosphere-supported imidazolium-based ionic liquids with enhanced antimicrobial activities显示文摘The design of stable,efficient and processable bactericidal materials represents a significant challenge for combating multidrugresistant bacteria in a variety of engineering fields.Herein,we report a facile strategy for the preparation of hollow polymeric nanosphere(HPN)-supported imidazolium-based ionic liquids(denoted as HPN-ILs)with superior antimicrobial activities.HPNILs were tailored by moderate Friedel−Crafts polymerization followed by the sequential covalent bonding of imidazole and bromoalkene.The resultant HPN-ILs have uniform hollow spherical morphology,an adequate surface area,and excellent physicochemical stability.Furthermore,they are highly active against both Gram-positive and Gram-negative bacteria and exhibit typical time/dosage-dependent antibacterial activities.The rational combination of porous HPNs and antibacterial ILs to generate an all-in-one entity may open new avenues for the design and fabrication of efficient bacteriostatic agents.Moreover,HPN-ILs have good biocompatibility and can also be loaded onto diverse matrices,and thus could extend their practical bactericidal application in the potential biomedical-active field. | Yu Zhang Shuwei Li Yixin Xu Xinyun Shi Mingxin Zhang Yingning Huang Ying Liang Yaqiong Chen Wanli Ji Jung Rae Kim Wenliang Song Deng-Guang Yu Il Kim | 2022 | Nano Research2022，15，6： | 1 |
| 17 | Isothermal and Nonisothermal Melt-Crystallization Kinetics of Syndiotactic Polystyrene 显示文摘 | Qingyong Chen Yingning Yu Tianhai Na | 2002 | Joumal ofAppliedPolymerSeience2002，83，： | 1 |
| 18 | Isothermal and nonisothermal crystallization kinetics of nylon-ll 显示文摘 | Liu Siyang Yu Yingning Cui Yi | 1998 | Journal of Applied Polymer Science1998，70，12： | 1 |
| 19 | Design and aligner-assisted fast fabrication of a microfluidic platform for quasi-3D cell studies on an elastic polymer显示文摘While most studies of mechanical stimulation of cells are focused on two-dimensional(2D)and three-dimensional(3D)systems,it is rare to study the effects of cyclic stretching on cells under a quasi-3D microenvironment as a linkage between 2D and 3D.Herein,we report a new method to prepare an elastic membrane with topographic microstructures and integrate the membrane into a microfluidic chip.The fabrication difficulty lay not only in the preparation of microstructures but also in the alignment and bonding of the patterned membrane to other layers.To resolve the problem,we designed and assembled a fast aligner that is cost-effective and convenient to operate.To enable quasi-3D microenvironment of cells,we fabricated polydimethylsiloxane(PDMS)microwell arrays(formed by micropillars of a few microns in diameter)with the microwell diameters close to the cell sizes.An appropriate plasma treatment was found to afford a coating-free approach to enable cell adhesion on PDMS.We examined three types of cells in 2D,quasi-3D,and 3D microenvironments;the cell adhesion results showed that quasi-3D cells behaved between 2D and 3D cells.We also constructed transgenic human mesenchymal stem cells(hMSCs);under cyclic stretching,the visualizable live hMSCs in microwells were found to orientate differently from in a 3D Matrigel matrix and migrate differently from on a 2D flat plate.This study not only provides valuable tools for microfabrication of a microfluidic device for cell studies,but also inspires further studies of the topological effects of biomaterials on cells. | Yingning He Yue Yu Yuqian Yang Yexin Gu Tianjiao Mao Yang Shen Qiong Liu Ruili Liu Jiandong Ding | 2022 | Bioactive Materials2022，7，9： | 0 |
| 20 | Is polydopamine beneficial for cells on the modified surface?显示文摘Since the pioneering work of Messersmith’s group discovering that polydopamine(PDA)can serve to adhere to many types of materials,the PDA coating has,as a biomimetic approach,been widely used to enhance cell adhesion by surface modification to bind biologically active substances to a bioinert substrate.Nevertheless,it is unclear whether or not the PDA itself is beneficial for cells.Herein,we report that a PDA coating decreases viability of cells under normal culture and observation conditions.Such an inhibition effect was not caused by the free PDA or any inherent cytotoxicity of this chemical substance but a contactdependent phenomenon.Human bone marrow mesenchymal stem cells were employed as the default cell type and tissue culture plates were used as the default substrate,although some other cell types and substrates were also examined to confirm the universality of such an‘abnormal’phenomenon of a superstar molecule.The viability of cells on the PDA coating exhibited time dependence,and the decreased cell viability during the normal observation time was found to come from the decrease of cell number instead of the decrease of average viability per cell.The PDA coating led to less cell global migration yet more local motility of cells.Based on the concept of‘background adhesion’of cells on a surface without significant motifs of specific cell adhesion,we supposed that cells adhered to the PDA coating better,which influenced mobility and eventually proliferation.Hence,the cell behaviors on the PDA coating are reasonable,albeit a bit complicated. | Yue Yu Xiuli Wang Yi Zhu Yingning He Hongrui Xue Jiandong Ding | 2022 | Regenerative Biomaterials2022，9，1： | 0 |
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