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| 1 | Development of 3D bioprinting:From printing methods to biomedical applications显示文摘Biomanufacturing of tissues/organs in vitro is our big dream,driven by two needs:organ transplantation and accurate tissue models.Over the last decades,3D bioprinting has been widely applied in the construction of many tissues/organs such as skins,vessels,hearts,etc.,which can not only lay a foundation for the grand goal of organ replacement,but also be served as in vitro models committed to pharmacokinetics,drug screening and so on.As organs are so complicated,many bioprinting methods are exploited to figure out the challenges of different applications.So the question is how to choose the suitable bioprinting method?Herein,we systematically review the evolution,process and classification of 3D bioprinting with an emphasis on the fundamental printing principles and commercialized bioprinters.We summarize and classify extrusion-based,dropletbased,and photocuring-based bioprinting methods and give some advices for applications.Among them,coaxial and multi-material bioprinting are highlighted and basic principles of designing bioinks are also discussed. | Zeming Gu Jianzhong Fu Hui Lin Yong He | 2020 | Asian Journal of Pharmaceutical Sciences2020，15，5： | 11 |
| 2 | THEORETICAL PREDICTION OF TOOL-CHIP CONTACT LENGTH IN ORTHOGONAL METAL MACHINING BY COMPUTER SIMULATION显示文摘A method for determination of tool-chip contact length is theoretically presented in orthogonal metal machining. By using computer simulation and based on the analyses of the elastro-plastic deformation with lagrangian finite element method in the deformation zone,the accumulated representative length of the low layer, the tool-chip contact length of the chip contacting the tool rake are calculated, experimental studies are also carried out with 0.2% carbon steel. It is shown that the tool-chip contact lengths obtained from computer simulation have a good agreement with those of measured values. | Gu Lizhi Long Zeming Cao LiwenCollege of Mechanical Engineering, Jiamusi University, Jiamusi 154007, ChinaYuan Zhejun Harbin Institute of Technology | 2002 | Chinese Journal of Mechanical Engineering2002，15，3： | 3 |
| 3 | Why choose 3D bioprinting?Part II:methods and bioprinters显示文摘Classification of 3D bioprinting As we mentioned in the last editorial,3D printing,also known as additive manufacturing,could be considered as the reverse process of potato cutting,automatically assembling sliced potato,shredded potato,diced potato to integrity[1].Generally speaking,cell-laden 3D bioprinting can be classified into three types:extrusion-based,droplet-based and photocuring-based bioprinting according to different printing principles.Extrusion-based bioprinting squeezes out continuous hydrogel fibers to set up structures;dropletbased bioprinting generates droplets as the basic unit for biofabrication;and photocuring-based bioprinting utilizes the characteristics of light-sensitive materials,to stack 3D models layer-by-layer.Different bioprinting approaches own diverse characteristics facing various scenarios and have specific requirements for bioinks. | Yong He Zeming Gu Mingjun Xie Jianzhong Fu Hui Lin | 2020 | Bio-Design and Manufacturing2020，3，1： | 2 |
| 4 | First-principles study of lattice dynamics and thermodynamic properties of LaCl3 and LaBr3 显示文摘 | LIU Bo GU Mu QI Zeming | 2007 | Phys Rev B2007，76，06： | 1 |
| 5 | Aurivillius compound Bi_(5)Ti_(3)CrO_(15) as a visible-light-active photocatalyst for hydrogen production from water显示文摘Layered Aurivillius compound Bi_(5)Ti_(3)CrO_(15) has been synthesized by a hydrothermal method for the application as a photocatalyst to liberate hydrogen from water. Bi_(5)Ti_(3)CrO_(15) owns a narrow band gap (Eg ~2.46 eV) and shows stable photocatalytic activity under both full range (λ ≥250 nm) and visible light illumination (λ ≥420 nm). A short hydrothermal reaction time is critical to achieve high photocatalytic activity as defects such as Cr^(6+) and Bi^(5+) can be avoided. An AQE as high as 3.66% at 420 nm ± 20 nm has been recorded, warranting promising application in the field of solar energy conversions. DFT calculation reveals the important role of Cr^(3+) cations for visible light sensitivity of Bi_(5)Ti_(3)CrO_(15). | Zeming Gu Jun Qian Ran Wang Meilin Lv Xiaoxiang Xu Chun Luo | 2021 | Journal of Energy Chemistry2021，30，11： | 0 |
| 6 | Research and Analysis of Regional Ecological Positioning in Planning Environmental Impact Assessment显示文摘The regional ecological positioning of one area is based on the region’s ecological orientation by the country or a larger region.Combined with the region’s natural geographical features,ecological background,main ecological problems,regional ecological structure,pattern,process,function and service,etc.,the position of a certain area in ecological space,structure,process,function and service,etc.is determined through the analysis and research.Regional ecological positioning is an important prerequisite and core basis for regional ecological impact assessment.However,in the current regional ecological impact assessment,most of them have not analyzed and studied the regional ecological positioning.Due to the lack of research on regional ecological positioning,it is rare to apply the research results of regional ecological positioning to the establishment of regional ecological objectives and the construction of index system.Regional ecological positioning does not guide the direction of regional ecological protection and construction well,and there is a general tendency of regional ecological positioning being one-sided and slogan-based.This paper analyzes the necessity and importance of research of regional ecological positioning,puts forward the technology framework of study on regional ecological positioning.With regional ecological positioning research in planning ecological impact assessment of the Chengdu-Chongqing Economic Zone as an example,how to carry out the study on the regional ecological positioning and how to apply the results of the study on the regional ecological positioning in regional ecological impact assessment are explained and illustrated. | Jianqiao QIN Donghang JIANG Fuxing GU Meng HU Rongjin YANG Yingli JIE Zeming ZHENG Haojia XU Xiaoxiao LIAO | 2022 | Meteorological and Environmental Research2022，13，5： | 0 |
| 7 | A bionic controllable strain membrane for cell stretching at air–liquid interface inspired by papercutting显示文摘Lung diseases associated with alveoli,such as acute respiratory distress syndrome,have posed a long-term threat to human health.However,an in vitro model capable of simulating different deformations of the alveoli and a suitable material for mimicking basement membrane are currently lacking.Here,we present an innovative biomimetic controllable strain membrane(BCSM)at an air–liquid interface(ALI)to reconstruct alveolar respiration.The BCSM consists of a high-precision three-dimensional printing melt-electrowritten polycaprolactone(PCL)mesh,coated with a hydrogel substrate—to simulate the important functions(such as stiffness,porosity,wettability,and ALI)of alveolar microenvironments,and seeded pulmonary epithelial cells and vascular endothelial cells on either side,respectively.Inspired by papercutting,the BCSM was fabricated in the plane while it operated in three dimensions.A series of the topological structure of the BCSM was designed to control various local-area strain,mimicking alveolar varied deformation.Lopinavir/ritonavir could reduce Lamin A expression under over-stretch condition,which might be effective in preventing ventilator-induced lung injury.The biomimetic lung-unit model with BCSM has broader application prospects in alveoli-related research in the future,such as in drug toxicology and metabolism. | Yuanrong Li Mingjun Xie Shang Lv Yuan Sun Zhuang Li Zeming Gu Yong He | 2023 | International Journal of Extreme Manufacturing2023，5，4： | 0 |
| 8 | SrTiO_(3)-CaCr_(0.5)Nb_(0.5)O_(3) solid solutions as p-type photocatalysts for Z-scheme water splitting under visible light illumination显示文摘P-type semiconductivity has been observed in solid solution series(SrTiO_(3))_(1-x)(CaCr_(0.5)Nb_(0.5)O_(3))x(0.0≤x≤0.15),which all adopt cubic symmetry and own intense absorption in the visible light region.These solid solutions are superior H2 evolution photocatalysts under visible light illumination(λ≥400 nm).An AQE as high as 1.02%at 420±20 nm has been achieved at optimal composition(SrTiO_(3))_(0.85)(CaCr_(0.5)Nb_(0.5)O_(3))0.15 which significantly surpasses the parent compounds.Stoichiometric H_(2)/O_(2) production under visible light illumination has been successfully realized using Z-scheme system containing(SrTiO_(3))_(0.85)(CaCr_(0.5) Nb_(0.5) O_(3))_(0.15),WO_(3) and I^(-)/IO_(3)^(-)redox couple. | Zeming Gu Qi Wang Xiaoqin Sun Lingwei Lu Yuwei Zhang Ran Wang Shu Jin Yinlin Shao Jun Qian Xiaoxiang Xu | 2021 | Journal of Materials Science & Technology2021，，28： | 0 |
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