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Extracellular matrix and biomimetic engineering microenvironment for neuronal differentiation 预览
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作者 Deepak Jain Sabrina Mattiassi +1 位作者 Eyleen L.Goh Evelyn K.F.Yim 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第4期573-585,共13页
Extracellular matrix(ECM)influences cell differentiation through its structural and biochemical properties.In nervous system,neuronal behavior is influenced by these ECMs structures which are present in a meshwork,fib... Extracellular matrix(ECM)influences cell differentiation through its structural and biochemical properties.In nervous system,neuronal behavior is influenced by these ECMs structures which are present in a meshwork,fibrous,or tubular forms encompassing specific molecular compositions.In addition to contact guidance,ECM composition and structures also exert its effect on neuronal differentiation.This short report reviewed the native ECM structure and composition in central nervous system and peripheral nervous system,and their impact on neural regeneration and neuronal differentiation.Using topographies,stem cells have been differentiated to neurons.Further,focussing on engineered biomimicking topographies,we highlighted the role of anisotropic topographies in stem cell differentiation to neurons and its recent temporal application for efficient neuronal differentiation. 展开更多
关键词 BIOMIMETIC platforms biophysical cues contact guidance extracellular matrix NEURONAL development NEURAL regeneration NEURAL STEM CELL niche NEURONAL differentiation NEURONAL maturation STEM CELL topography
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Parametric Geometric Model and Shape Optimization of Airfoils of a Biomimetic Manta Ray Underwater Vehicle
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作者 罗扬 潘光 +2 位作者 黄桥高 施瑶 赖慧 《上海交通大学学报:英文版》 EI 2019年第3期402-408,共7页
As a new kind of autonomous underwater vehicle,bionic submersible has many merits such as high efficiency and low costs.In order to obtain such advantages,it is a good way to simulate the shapes of marine animals and ... As a new kind of autonomous underwater vehicle,bionic submersible has many merits such as high efficiency and low costs.In order to obtain such advantages,it is a good way to simulate the shapes of marine animals and apply them to the design of artificial underwater vehicle.In this paper,an optimization system of airfoils is proposed by the improved class-shape-transformation(CST)parameterization method and genetic algorithm(GA).The appearance of a manta-ray-inspired underwater vehicle is rebuilt using the optimal sectional airfoils obtained by the proposed optimization system.Computational simulations are carried out to investigate the hydrodynamic performance of the submersible using the commercial computational fluid dynamics(CFD)code Fluent.The results demonstrate that the maximum thickness of the vehicle increases by 9%,which means the loading capacity is increased.Moreover,the underwater vehicle shows better hydrodynamic performance,and the lift-drag ratio of initial design is increased by more than 10%using the presented optimization system of airfoils. 展开更多
关键词 BIOMIMETIC underwater vehicle class-shape-transformation(CST)parameterization method SHAPE optimization computational fluid dynamics(CFD)
荷叶表面的复刻及微纳结构对疏水性能的影响 预览
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作者 向静 王宏 +3 位作者 朱恂 丁玉栋 廖强 陈蓉 《化工学报》 EI CAS CSCD 北大核心 2019年第9期3545-3552,共8页
结合改进的模板法和ZnO水热生长法在环氧树脂基底上得到了荷叶仿生超疏水结构,该方法工艺流程简单、制作成本低廉,可以实现微观结构的快速复刻。研究了模板法对天然表面复刻的适用范围,其对荷叶和水稻等具有突起类微观结构表面的复刻效... 结合改进的模板法和ZnO水热生长法在环氧树脂基底上得到了荷叶仿生超疏水结构,该方法工艺流程简单、制作成本低廉,可以实现微观结构的快速复刻。研究了模板法对天然表面复刻的适用范围,其对荷叶和水稻等具有突起类微观结构表面的复刻效果良好,并研究了水热法中ZnO生长液浓度对纳米结构的影响。同时为了研究不同微观结构对表面疏水性能的影响,制作了光滑表面、纳米结构表面和仿荷叶微米结构表面,并测试了表面的疏水性能。结果表明,粗糙结构能够提高低能表面的疏水性能,微纳复合结构更有利于表面形成超疏水;增加表面的粗糙结构能够增加液滴与固体接触面上的气-液占比,进而使得液滴在表面的接触角增加。 展开更多
关键词 仿生 表面制备 纳米结构 微纳复合结构 界面 疏水性
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仿生型纳米红细胞靶向药物递送系统的制备及体内外抗肿瘤效果评价 预览
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作者 魏恺言 付旭东 +4 位作者 王新军 周少龙 马建 刘菲菲 孟恩平 《安徽医科大学学报》 CAS 北大核心 2019年第7期1016-1022,共7页
目的构建精氨酸-甘氨酸-天冬氨酸(RGD)修饰的包载阿霉素(DOX)的仿生型纳米红细胞(NE)靶向药物递送系统RGD-NE-DOX,并进行体内外抗肿瘤效果评价。方法通过物理挤压法制备包载DOX的纳米红细胞NE-DOX,RGD修饰后构建RGD-NE-DOX,检测其形态... 目的构建精氨酸-甘氨酸-天冬氨酸(RGD)修饰的包载阿霉素(DOX)的仿生型纳米红细胞(NE)靶向药物递送系统RGD-NE-DOX,并进行体内外抗肿瘤效果评价。方法通过物理挤压法制备包载DOX的纳米红细胞NE-DOX,RGD修饰后构建RGD-NE-DOX,检测其形态、粒径、电位、载药量和包封率,透析法测定体外释药特性,共聚焦显微镜观察体外摄取情况及靶向性,并进行体内组织分布及药效学研究。结果制备的RGD-NE-DOX呈球形,平均粒径(197.41±2.27) nm,聚合物分散性指数(PDI)为(0.21±0.02),电位(-16.87±1.51) mV,载药量(14.8±1.2)%,包封率(58.69±3.7)%;RGD-NE-DOX较单纯DOX突释降低,缓释特性明显;乳腺癌细胞MCF-7对RGD-NE-DOX的摄取多于NE-DOX和游离DOX,但正常乳腺细胞Hs578Bst几乎不摄取RGD-NE-DOX;体内组织分布结果表明RGD-NE-DOX肿瘤靶向性强,作用时间长;药效学结果表明RGD-NE-DOX抗肿瘤作用更强(P<0.05),组织切片显示具有良好生物相容性。结论仿生型纳米药物递送系统RGD-NE-DOX循环时间长,具有良好的生物相容性及靶向性,抗肿瘤效果明显,具有广阔的应用前景。 展开更多
关键词 仿生型 细胞-纳米药物递送系统 红细胞 靶向性
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Adaptive biomimetic facades:Enhancing energy efficiency of highly glazed buildings
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作者 Wajiha Tariq Sheikh Quratulain Asghar 《建筑学研究前沿(英文版)》 CSCD 2019年第3期319-331,共13页
In this paper,we investigate the design of an adaptive biomimetic facade as a practical solution for enhancing energy efficiency of highly glazed buildings in the hot and humid regions.We present an adaptive facade th... In this paper,we investigate the design of an adaptive biomimetic facade as a practical solution for enhancing energy efficiency of highly glazed buildings in the hot and humid regions.We present an adaptive facade that reduces solar heat gain and hence the energy consumption of the building,with minimal reduction in visual comfort(i.e.,indoor lighting levels and visibility to the outer environment)of the users.The basic module of the facade consists of four shading devices that can be folded along both horizontal and vertical axes.The design enables shading under both high and low sun angles,without blocking visibility to the outdoor environment.To develop the facade,we explore and mimic the physical,physiological and adaptation properties of an Oxalis oregana-a leaf that has the natural ability to track sun path and change its angle/position accordingly.As a case study for the proposed facade,we take an existing 20-story office building in the hot and humid climate of Lahore,Pakistan.Our numerical results indicate that after retrofitting of the designed facade,the building’s existing energy load decreases by 32%.Moreover,50%of the interior space(as opposed to 55%before the retrofitting)still has lighting level within the recommended range of 500-750 lux.The investigation demonstrates that the proposed biomimetic facade can significantly reduce the energy consumption,with minimal reduction in visual comfort,of highly glazed buildings. 展开更多
关键词 ADAPTIVE solar FACADE BIOMIMETIC approach Retrofitting CLIMATE change
Output Second-order Sliding-mode Control for a Gecko Biomimetic Climbing Robot
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作者 David Cruz-Ortiz Mariana Ballesteros-Escamilla +1 位作者 Isaac Chairez Alberto Luviano 《仿生工程学报:英文版》 SCIE EI CSCD 2019年第4期633-646,共14页
The aim of this study is to propose the output controller to solve the execution of the gait sequence for Gecko Bio-inspired Robotic Devices (GBRDs).The Twisting Controller (TC) serves as basis of the tracking traject... The aim of this study is to propose the output controller to solve the execution of the gait sequence for Gecko Bio-inspired Robotic Devices (GBRDs).The Twisting Controller (TC) serves as basis of the tracking trajectory designed algorithm.The TC uses both the tracking error and its estimated derivative,which is calculated by a set of distributed Super-Twisting Algorithms (STAs).Each STA is implemented as a robust and exact differentiator.The output-based controller structure corresponds to a sort of decentralized form for robotic devices.Consequently,each articulation is controlled by an independent TC.A set of proposed references trajectories reproduce the gait cycle of a Real Gecko-Lizard (RG-L).The reference trajectories are proposed as the superposition of sigmoid functions ful-filling the conditions of the Bezzier polynomials.Numerical simulations evaluate the GBRD movement enforced by the suggested controller in the horizontal as well as the vertical gaits.An own 3D printed GBRD is the experimental platform aimed to test the distributed controller.Two controlled vacuum pumps are used to adhere the GBRD to the wall surfaces.A set of experimental validations confirm the robustness and the reliability of the proposed controller when its performance is compared with classical output feedback controllers. 展开更多
关键词 GECKO robot BIOMIMETIC output-based CONTROLLER TWISTING CONTROLLER Super-Twisting Algorithm(STA)
H13钢激光填丝仿生耦合热疲劳性能分析 预览
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作者 刘立君 于义涛 +1 位作者 贾志欣 陈光圆 《焊接学报》 EI CAS CSCD 北大核心 2019年第3期6-10,I0002共6页
热疲劳龟裂是铝合金压铸模具的主要失效模式.针对这一现象,利用激光表面熔凝技术及激光表面填丝技术耦合仿生强化模型对压铸模具表面进行强化,分析不同处理方式下热疲劳裂纹扩展形态,探索提高压铸模具寿命的方法.试验利用Nd:YAG激光器... 热疲劳龟裂是铝合金压铸模具的主要失效模式.针对这一现象,利用激光表面熔凝技术及激光表面填丝技术耦合仿生强化模型对压铸模具表面进行强化,分析不同处理方式下热疲劳裂纹扩展形态,探索提高压铸模具寿命的方法.试验利用Nd:YAG激光器对试样进行加工,每隔500次热疲劳循环后,观察不同试样裂纹扩展情况,5000次循环后得出裂纹扩展形貌.结果表明,经过激光表面填丝技术处理所得的仿生单元体硬度相对于激光表面熔凝处理所得单元体略有提高,经激光表面填丝技术处理的试样具有更高的抗热疲劳性能. 展开更多
关键词 仿生强化 热疲劳裂纹 H13钢 激光熔凝 激光填丝
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Beetle elytron plate and the synergistic mechanism of a trabecular-honeycomb core structure
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作者 CHEN JinXiang ZHANG XiaoMing +2 位作者 OKABE Yoji XIE Juan XU MengYe 《中国科学:技术科学英文版》 SCIE EI CAS CSCD 2019年第1期87-93,共7页
For the development of lightweight biomimetic materials, the compressive properties of the beetle elytron plate(BEP, a type of biomimetic sandwich plate inspired from beetle elytra) and the underlying mechanism thereo... For the development of lightweight biomimetic materials, the compressive properties of the beetle elytron plate(BEP, a type of biomimetic sandwich plate inspired from beetle elytra) and the underlying mechanism thereof were investigated. With the following results:(1) The shared mechanism of trabeculae was revealed by using structural analysis. It is further predicted that a BEP with hollow trabeculae should possess enhanced compressive properties.(2) When the trabecular number(N) in a hexagonal unit of the honeycomb is less than three, the compressive strength of the BEP is rapidly increased with the increment of N. When N is over four, the deformation capacity is significantly improved because of the arising of S-type buckling deformation in the core structure of the BEP. Furthermore, the definition of the BEP is proposed combined with the biological structure of the beetle elytra.(3) When N=6 and the external diameter of trabeculae is equal to the length of honeycomb walls, the synergistic mechanism between the trabeculae and the honeycomb walls in BEPs is fully exerted. Namely, the trabecula restricts the deformation of the honeycomb walls;in turn, the honeycomb walls provide lateral support for the trabecula. This mechanism leads the core in the BEP to generate an S-type global buckling deformation producing the best compressive properties. The results will greatly impact the biomimetic field of beetle elytra and many industries in which honeycomb structure also serves as a key component. 展开更多
关键词 BEETLE ELYTRA BEETLE elytron PLATE SANDWICH structure biomimetic material compressive property
Design and Fabrication of a Bio-inspired Acceleration Sensor Using Liquid Mass Blocks 预览
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作者 BIAN Yixiang ZHANG Yi +3 位作者 ZHANG Yanjun GONG Junjie JIN Hong DAI Longchao 《南京航空航天大学学报:英文版》 EI CSCD 2019年第1期154-161,共8页
A linear acceleration sensor,which is inspired by the human balance organ,is designed and prepared. It uses a liquid mass-block and a symmetrical-electrodes metal-core polyvinylidene fluoride fiber(SMPF)as the sensor ... A linear acceleration sensor,which is inspired by the human balance organ,is designed and prepared. It uses a liquid mass-block and a symmetrical-electrodes metal-core polyvinylidene fluoride fiber(SMPF)as the sensor element. The output signal of the sensor has an exponential relationship with the excitation amplitude of the impacting vibration. It is capable of detecting the amplitude and the correct frequency for sinusoidal excitations using an exponential correlation. The experiments indicate that both the output signal of the sensor and the resonance frequency increase substantially with increasing diameter of the metal core. The first-order resonance frequencies of the sensors with 40,60,and 80 μm diameter metal wires are below 10 Hz,which is near the range of human body motion frequencies. 展开更多
关键词 ACCELERATION sensor PVDF FIBER BIOMIMETIC liquid mass
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Biomimetic nanochannel membrane for cascade response of borate and cis-hydroxyl compounds: An IMP logic gate device
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作者 Meitao Deng Meng Yang +6 位作者 Yaqing Xu Yuqiong Sun Qing Wang Jianbo Liu Jin Huang Xiaohai Yang Kemin Wang 《中国化学快报:英文版》 SCIE CAS CSCD 2019年第7期1397-1400,共4页
Biomimetic nanodevice is an important branch to expand the potential applications of artificial nanochannels. Here, we constructed nanochannels for cascade response of borate and cis-hydroxyl compounds by modifying th... Biomimetic nanodevice is an important branch to expand the potential applications of artificial nanochannels. Here, we constructed nanochannels for cascade response of borate and cis-hydroxyl compounds by modifying the nanochannels of track-etched polycarbonate (TEPC) membranes with polyvinyl alcohol (PVA). Firstly, borate bound to PVA and increased the negative charge density on the surface of the nanochannels, which obstructed the transport of 1,5-naphthalene disulfonate (NDS2-). Subsequently, the addition of cis-hydroxyl compounds induced leaving of borate due to the stronger binding affinities between borate and cis-hydroxyl compounds, which reduced the negative charge density on nanochannels and then enhanced the transport of NDS2-. The cascade response of the nanochannels also accord with the properties of IMP (implication) logic gate. In addition, such nanochannels showed good reproducibility and reversibility. Therefore, this cascade response model based on nanochannels has the potential to be used as switches in area of actuators and biosensors, and is also expected to be used to understand the interaction of substances in nanoscale and simulate the physiological functions of boron. 展开更多
关键词 BIOMIMETIC NANOCHANNEL CASCADE RESPONSE Logic gate BORATE cis-Hydroxyl compound
Red blood cell membrane-camouflaged nanoparticles: a novel drug delivery system for antitumor application
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作者 Qing Xia Yongtai Zhang +2 位作者 Zhe Li Xuefeng Hou Nianping Feng 《药学学报:英文版》 CSCD 2019年第4期675-689,共15页
Erythrocytes(red blood cells, RBCs) are the most abundant circulating cells in the blood and have been widely used in drug delivery systems(DDS) because of their features of biocompatibility,biodegradability, and long... Erythrocytes(red blood cells, RBCs) are the most abundant circulating cells in the blood and have been widely used in drug delivery systems(DDS) because of their features of biocompatibility,biodegradability, and long circulating half-life. Accordingly, a 'camouflage' comprised of erythrocyte membranes renders nanoparticles as a platform that combines the advantages of native erythrocyte membranes with those of nanomaterials. Following injection into the blood of animal models, the coated nanoparticles imitate RBCs and interact with the surroundings to achieve long-term circulation. In this review, the biomimetic platform of erythrocyte membrane-coated nano-cores is described with regard to various aspects, with particular focus placed on the coating mechanism, preparation methods, verification methods, and the latest anti-tumor applications. Finally, further functional modifications of the erythrocyte membranes and attempts to fuse the surface properties of multiple cell membranes are discussed,providing a foundation to stimulate extensive research into multifunctional nano-biomimetic systems. 展开更多
关键词 Red BLOOD cells MEMBRANE NANOPARTICLES DRUG delivery ANTITUMOR BIOMIMETIC NANOPARTICLES
Bio-inspiration as a Concept for Sustainable Constructions Illustrated on Graded Concrete
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作者 Rafael Horn Stefan Albrecht +5 位作者 Walter Haase Max Langer Daniel Schmeer Werner Sobek Olga Speck Philip Leistner 《仿生工程学报:英文版》 SCIE EI CSCD 2019年第4期742-753,共12页
The building industry is one of the main contributors to worldwide resource consumption and anthropogenic climate change.Therefore,sustainable solutions in construction are particularly urgent.Inspired by the success ... The building industry is one of the main contributors to worldwide resource consumption and anthropogenic climate change.Therefore,sustainable solutions in construction are particularly urgent.Inspired by the success principles of living nature,biologists and engineers present here an interdisciplinary work:The sustainability assessment of a bio-inspired material technology called graded concrete,which was developed at ILEK.Gradient structural materials can be found in plants on different hierarchical levels,providing a multitude of creative solutions for technology.Graded concrete applies this biological concept of structural optimization to the interior structure of concrete components to minimize material and resource expenditure.To evaluate the sustainability of this innovation,a newly developed quantitative Bio-inspired Sustainability Assessment(BiSA)method is applied.It focuses on the relationship of environmental,social and economic functions and the corresponding burdens quantified basing on life cycle assessment.The BiSA of graded concrete slabs shows significant improvements over conventional concrete for the applied use case.While an overall reduction of environmental burdens by 13%is expected,economic burdens can be reduced by up to 40%and social burdens by 35.7%.The assessment of the graded concrete technology identifies its potential with regard to sustainable construction.The presented work provides a blueprint for the interdisciplinary,integrative work on sustainable,bio-inspired innovations.It shows that the synergies of bio-inspiration and BiSA within technical product development can be fruitful. 展开更多
关键词 SUSTAINABILITY assessment BIO-INSPIRED SUSTAINABILITY GRADED CONCRETE biomimetic PROMISE BiSA
Friction and Wear Study on Friction Pairs with a Biomimetic Non-smooth Surface of 316L Relative to CF/PEEK under a Seawater Lubricated Condition 预览
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作者 Yingna Liang Dianrong Gao +1 位作者 Bo Chen Jianhua Zhao 《中国机械工程学报:英文版》 SCIE EI CAS CSCD 2019年第4期47-60,共14页
Current studies of a seawater axial piston pump mainly solve the problems of corrosion and wear in a slipper pair by selecting materials with corrosion resistance, self-lubrication, and wear resistance. In addition, a... Current studies of a seawater axial piston pump mainly solve the problems of corrosion and wear in a slipper pair by selecting materials with corrosion resistance, self-lubrication, and wear resistance. In addition, an appropriate biomimetic non-smooth surface design for the slipper pair can further improve the tribological behavior. In this paper, 316 L stainless steel and CF/PEEK were selected to process the upper and bottom specimens, and the biomimetic non-smooth surface was introduced into the interface between the friction pair. The friction and wear tests were performed on a MMD-5 A tester at a rotation speed of 1000 r/min and load of 200 N under seawater lubricated condition. The results indicate that the main friction form of the smooth surface friction pair corresponds to abrasive wear and adhesive wear and that it exhibits a friction coe cient of 0.05–0.07, a specimen temperature of 56 ℃, a high wear rate, and surface roughness. Pits on the non-smooth surface friction pairs produced hydrodynamic lubrication and reduced abrasive wear, and thus the plowing e ect is their main friction form. The non-smooth surface friction pairs exhibit a friction coe cient of 0.03–0.04, a specimen temperature of 48 ℃, a low wear rate, and surface roughness. The study has important theoretical significance for enriching the lubrication, friction, and wear theory of a seawater axial piston pump, and economic significance and military significance for promoting the marine development and the national defense military. 展开更多
关键词 BIOMIMETIC NON-SMOOTH surface 316L CF/PEEK Seawater LUBRICATION FRICTION and WEAR
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Biomimetic Chiral Pyridoxal and Pyridoxamine Catalysts
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作者 Jianfeng Chen Yong Ethan Liu +2 位作者 Xing Gong Limin Shi Baoguo zhao 《中国化学:英文版》 SCIE CAS CSCD 2019年第2期103-112,I0002共11页
What is the most favorite and original chemistry developed in your research group? Vitamin B6-based biomimetic asymmetric catalysis. How do you get into this specific field? Could you please share some experiences wit... What is the most favorite and original chemistry developed in your research group? Vitamin B6-based biomimetic asymmetric catalysis. How do you get into this specific field? Could you please share some experiences with our readers? Enzymatic transformations are characterized by high efficiency, specific selectivities, and mild conditions, which attracts me to do some chemistry related to biological systems. 展开更多
关键词 BIOMIMETIC CHIRAL PYRIDOXAL PYRIDOXAMINE CATALYSTS
Development of a Tactile and Slip Sensor with a Biomimetic Structure-enhanced Sensing Mechanism
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作者 Yonggang Jiang Zhiqiang Ma +3 位作者 Bonan Cao Longlong Gong Lin Feng Deyuan Zhang 《仿生工程学报:英文版》 SCIE EI CSCD 2019年第1期47-55,共9页
Tactile and slip sensors have gained tremendous attention for their promising applications in the fields of smart robotics,implantable medical devices and minimally invasive surgery.Inspired by the structure-enhanced ... Tactile and slip sensors have gained tremendous attention for their promising applications in the fields of smart robotics,implantable medical devices and minimally invasive surgery.Inspired by the structure-enhanced sensing mechanisms of human fingertips and tree frog toes,we developed a tactile and slip sensor by combining biomimetic surface microstructures with highly sensitive P(VDF-TrFE)nanofiber sensors on a flexible polyimide substrate.As the surface microstructures could mediate the micro-vibration induced by slip motion,the frequencies of output signals revealed a strong correlation with the periods of microstructures.In addition,we proposed a method to discriminate touch force from slip motion using the criterion of standard deviation of time delay from the output signals of neighboring sensor elements. 展开更多
关键词 TACTILE SENSOR SLIP detection NANOFIBER microstructure BIOMIMETIC SENSING
人工仿生纳米通道构建及应用研究进展 预览
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作者 孙耀 《徐州工程学院学报:自然科学版》 CAS 2019年第3期7-14,共8页
自然界中有许多纳米通道在生命体内发挥着至关重要的作用.受到生物纳米通道的启发,研究者们开发出一种具有基础研究价值的人工仿生纳米通道.近几年,人工仿生纳米通道不仅构建了各种离子响应以及分子响应的功能化的纳米通道,并且还构建... 自然界中有许多纳米通道在生命体内发挥着至关重要的作用.受到生物纳米通道的启发,研究者们开发出一种具有基础研究价值的人工仿生纳米通道.近几年,人工仿生纳米通道不仅构建了各种离子响应以及分子响应的功能化的纳米通道,并且还构建了各种功能化的纳米通道用来调控离子及分子的传输.对人工仿生纳米通道的研究,有利于发现一些生命现象的本质,也有利于促进生物传感、材料科学的发展.文章综述了仿生纳米通道的制备方法、发展现状及应用前景. 展开更多
关键词 纳米通道 仿生 整流 生物传感
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水陆两栖仿生机器人研究进展及应用 预览
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作者 苏宗帅 《国防科技》 2019年第4期50-54,共5页
从水陆两栖应用需求,讨论水陆两栖机器人的必要性以及技术实现途径。通过技术对比,指出两栖仿生机器人的性能优势及研究的必要性,并介绍了国内外研究现状。最后,根据两栖仿生机器人的特点,提出了两栖应用的新方法。
关键词 两栖 仿生 机器人
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Advances in the application of biomimetic surface engineering in the oil and gas industry
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作者 Yanbao GUO ,Zheng ZHANG Siwei ZHANG 《摩擦(英文版)》 CSCD 2019年第4期289-306,共18页
Friction is widespread in almost every field in the oil and gas industry,and it is accompanied by huge energy losses and potential safety hazards.To deal with a series of questions in this regard,biomimetic surfaces h... Friction is widespread in almost every field in the oil and gas industry,and it is accompanied by huge energy losses and potential safety hazards.To deal with a series of questions in this regard,biomimetic surfaces have been developed over the past decades to significantly reduce economic losses.Presently,biomimetic surface engineering on different scales has been successfully introduced into related fields of the oil and gas industry,such as drill bits and the inner surfaces of pipes.In this review,we focused on the most recent and promising efforts reported toward the application of a biomimetic surface in oil and gas fields,indicating the necessity and importance of establishing this disciplinary study.Regarding the oil and gas industry,we mainly analyzed and summarized some important research results into the following three aspects:(i)applications in reducing the wear of exploration production equipment and its components,(ii)separation and drag release technologies in oil/gas storage and transportation,and(iii)functional coatings used in oil and gas development in oceans and polar regions.Finally,based on an in‐depth analysis of the development of biomimetic surface engineering in the fields of oil and gas,some conclusions and perspectives are also discussed.It is expected that biomimetic surface engineering can be used in oil and gas fields more widely and systematically,providing important contributions to green development in the near future. 展开更多
关键词 FRICTION and WEAR BIOMIMETIC surface ENGINEERING oil and gas INDUSTRY
Near-field electrospinning of a polymer/bioactive glass composite to fabricate 3D biomimetic structures 预览
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作者 Krishna C.R.Kolan Jie Li +4 位作者 Sonya Roberts Julie A.Semon Jonghyun Park Delbert E.Day Ming C.Leu 《国际生物打印期刊》 2019年第1期14-19,共6页
Bioactive glasses have recently gained attention in tissue engineering and three-dimensional(3D)bioprinting because of their ability to enhance angiogenesis.Some challenges for developing biological tissues with bioac... Bioactive glasses have recently gained attention in tissue engineering and three-dimensional(3D)bioprinting because of their ability to enhance angiogenesis.Some challenges for developing biological tissues with bioactive glasses include incorporation of glass particles and achieving a 3D architecture mimicking natural tissues.In this study,we investigate the fabrication of scaffolds with a polymer/bioactive glass composite using near-field electrospinning(NFES).An overall controlled 3D scaffold with pores,containing random fibers,is created and aimed to provide superior cell proliferation.Highly angiogenic borate bioactive glass(13-93B3)in 20 wt.%is added to polycaprolactone(PCL)to fabricate scaffolds using the NFES technique.Scaffolds measuring 5 mm×5 mm×0.2 mm^3 in overall dimensions were seeded with human adipose-derived mesenchymal stem cells to investigate the cell viability.The cell viability on PCL and PCL+glass scaffolds fabricated using NFES technique and 3D printing is compared and discussed.The results indicated higher cell proliferation on 3D biomimetic scaffolds fabricated by NFES technique. 展开更多
关键词 NEAR-FIELD ELECTROSPINNING three-dimensional BIOMIMETIC scaffold polycaprolactone polymer/bioactive GLASS COMPOSITE borate bioactive GLASS human adipose-derived stem cells
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3种含锌金属配合物模拟碳酸酐酶的活性研究 预览
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作者 黄月云 陈海欣 赵力民 《广东药科大学学报》 CAS 2019年第3期337-341,共5页
目的研究3种含锌金属配合物:化合物1{(Me2NH2)2[Zn6(μ4-O)(ad)4(BPDC)4]}n、化合物2[Zn5(btz)6(NO3)4(H2O)]以及化合物3{[Zn5Cl4(Me2bta)6]·2DMF}模拟碳酸酐酶的催化活性。方法在类似于碳酸酐酶催化环境下,用3种含锌金属配合物催... 目的研究3种含锌金属配合物:化合物1{(Me2NH2)2[Zn6(μ4-O)(ad)4(BPDC)4]}n、化合物2[Zn5(btz)6(NO3)4(H2O)]以及化合物3{[Zn5Cl4(Me2bta)6]·2DMF}模拟碳酸酐酶的催化活性。方法在类似于碳酸酐酶催化环境下,用3种含锌金属配合物催化对硝基苯基乙酸酯(p-NPA)的水解反应,通过比较三者的催化初速率来判断化合物1、2和3的催化活性。结果3种金属配合物均可以有效地促进p-NPA的水解,化合物1、2和3的催化初速率分别是1.1×10-2、2.1×10-2、1.5×10-2μmol/(L·s),p-NPA自我降解的初速率为0.7×10-2μmol/(L·s)。化合物1、2和3催化p-NPA水解的初速率分别是p-NPA自我降解初速率的1.6、3、2倍。结论化合物2和3仿生模拟的催化性能较高,合成简单,有望成为CO2处理的新材料。 展开更多
关键词 金属配合物 仿生模拟酶催化 碳酸酐酶
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