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Biosurface and Biotribology 2024年第3期10卷 132-141页

作者： Dengke Chen xianxian cui Huawei Chen College of Transportation Ludong UniversityYantaiShandongChina School of Mechanical Engineering and Automation Beihang UniversityBeijingChina Advanced Innovation Center for Biomedical Engineering Beihang UniversityBeijingChina

Improving energy efficiency and cost reduction is a perennial challenge in *** biological systems have evolved unique functional surfaces or special physiological functions over centuries to adapt to their complex *** these biological wonders,fish,one of the oldest vertebrate groups,has garnered significant attention due to its exceptional fluid dynamics *** are actively exploring the potential of fish skin's distinctive structural and material characteristics in reducing *** this study,models of biomimetic imbricated fish scale are established,and the evolution characteristics of the flow field and drag reduction performance on these bionic surfaces are *** results showed a close relationship between the high-low velocity stripes generated and the fluid motion by the imbricated fish scale *** stripes'prominence increases with the spacing of the adjacent scales and tilt angle of the fish scale,and the velocity amplitude of the stripes decreases as the exposed length of the imbricated fish scale surface ***,the biomimetic imbricated fish scale surface can decrease the velocity gradient and thereby reduce the wall shear *** insights gained from the fish skin-inspired imbricated fish surface provide valuable perspectives for an in-depth analysis of fish hydrodynamics and offer fresh inspiration for drag reduction and antifouling strategies in engineering applications.

关键词： bionic surface drag reduction

Controllable deformation based self-adaptive drag reduction for complex surface

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Biosurface and Biotribology 2023年第1期9卷 17-23页

Reduction of energy consumption and improvement of cruising speed are greatly necessary for underwater ***,regular riblets have been machined and the drag reduction has been verified;however,the riblet parameters are not adjusted like the denticles of sharkskin,which adapt quickly to the complex changing fluid *** achieve an improved drag reduction effect on the complicated shape surface,a simple,low-cost,and timesaving stretching approach was proposed to adjust the riblet parameters on the underwater vehicle surface by controllable *** latex rubber membrane with regular micro-riblets was prepared as a stretching flexible film,and the spacing and height of the micro-riblets were adjusted by adaptive control of the stretching *** circulating water channel experiment verified the effectiveness and feasibility of the selfadaptive drag reduction by the controllable deformation *** results demonstrated that the drag reduction rate of the controllable deformation bionic fish skin was 4.26%compared with a smooth surface at 0.25 m/s with an angle of attack of 0°,which is better than any other *** controllable deformation bionic fish skin provides a feasible method for the drag reduction of complex surface adaptive underwater vehicles.

关键词： biointerface bionic design biosurface friction

Drag reduction capacity of multi-scale and multi-level riblet in turbulent flow

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Biosurface and Biotribology 2024年第1期10卷 7-15页

作者： Dengke Chen Wenhao Li Yichen Zhao Jinhai Liu xianxian cui Zehui Zhao Xiaolin Liu Huawei Chen College of Transportation Ludong UniversityYantaiShandongChina School of Mechanical Engineering and Automation Beihang UniversityBeijingChina Advanced Innovation Center for Biomedical Engineering Beihang UniversityBeijingChina

For high-speed moving objects,drag reduction has been a prolonged major *** address this problem,passive and negative strategies have been proposed in the preceding *** integration of creatures and nature has been continuously perfected during biological *** structure characteristics,material properties,and special functions of marine organisms can provide inexhaustible inspirations to solve this intractable problem of drag ***,a simple and low-cost laser ablation method was proposed.A multi-scale and multi-level riblet(MSLR)surface inspired by the denticles of the sharkskin was fabricated by controlling the density of the laser path and ablation *** morphology and topographic features were characterised using an electron microscope and a scanning white-light interfering ***,the drag reduction capacity of the bionic riblet surface was measured in a circulating water ***,the mechanism of drag reduction was analysed by the computational fluid dynamics(CFD)*** results show that the MSLR surface has a stable drag reduction capacity with an increase in Reynold(Re)number which was contributed by high-low velocity stripes formed on the MSLR *** study can provide a reference for fabricating spatial riblets with efficient drag reduction at different values of Re and improving marine antifouling.

关键词： BIOMIMICS BIONIC STRUCTURE DRAG REDUCTION

高结晶度ZSM-5分子筛合成及分子动力学模拟

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化工学报 2013年第4期64卷 1493-1498页

作者：崔贤羡管卉黄民同济大学化学系上海200092 中国石油化工股份有限公司上海石油化工研究院上海201208

引言ZSM-5是一种具有独特的三维孔道结构和酸强度分布的沸石分子筛,具有高硅铝比和亲油疏水的特性[1],在吸附、催化等领域取得了广泛应用。近年来,出现了多种ZSM-5分子筛合成途径[2-4],由于其重要性,其形成机理也同样广受关注[5-8]。近... 详细信息

引言ZSM-5是一种具有独特的三维孔道结构和酸强度分布的沸石分子筛,具有高硅铝比和亲油疏水的特性[1],在吸附、催化等领域取得了广泛应用。近年来,出现了多种ZSM-5分子筛合成途径[2-4],由于其重要性,其形成机理也同样广受关注[5-8]。近年来分子动力学。

关键词： ZSM-5 分子动力学径向分布函数分子筛生长机理

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仿鱼类表皮减阻研究现状与进展

中国表面工程 2023年第5期36卷 14-36页

作者：陈登科崔线线苏琳刘晓林张力文陈华伟鲁东大学交通学院烟台264025 北京航空航天大学机械工程及自动化学院北京100191 中国船舶集团有限公司系统工程研究院北京100094 北京航空航天大学生物医学工程高精尖创新中心北京100191

舰船、飞机等高速运动表面的高效减阻技术仍是一项重大挑战。水下减阻是鱼类等高速游动生物长期进化形成的优势功能策略,揭示水下高速游动鱼类表皮结构特征或材质特性与减阻功能机制的相互关系,可为解决高速运动表面高摩擦阻力问题提供... 详细信息

舰船、飞机等高速运动表面的高效减阻技术仍是一项重大挑战。水下减阻是鱼类等高速游动生物长期进化形成的优势功能策略,揭示水下高速游动鱼类表皮结构特征或材质特性与减阻功能机制的相互关系,可为解决高速运动表面高摩擦阻力问题提供可行参考方案。首先以鲨鱼皮盾鳞结构和海豚弹性表皮为典型生物原型,简要介绍表皮独特结构特征和弹性材质特性,对金枪鱼表皮拓扑覆瓦鱼鳞结构特征和法向多层弹性材质特性进行总结,并介绍其他鱼类表皮的独特结构特征,进而介绍以鱼类表皮独特结构特征或材质特性为生物原型的减阻表面的仿生制造、减阻特性及减阻机理研究现状。最后,对仿生减阻表面在工程和生活中的应用进行简要阐述。提出以鱼类表皮为生物原型的仿生减阻表面的研究现状和发展方向,填补仿鱼类表皮结构特征或材质特性减阻领域目前缺少综述文章来引领的空白,可为进一步深入分析鱼类优异的水动力性能提供借鉴,并为构筑新型减阻防污表面提供参考。

关键词：仿生表面微观形貌仿生制造减阻机理

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High‐throughput formation of miniaturized cocultures of 2D cell monolayers and 3D cell spheroids using droplet microarray

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Droplet 2023年第1期2卷 36-46页

作者： Haijun cui Tina Tronser xianxian Wang Janine Wesslowski Gary Davidson Anna A.Popova Pavel A.Levkin Institute of Biological and Chemical Systems‐Functional Molecular Systems(IBCS‐FMS) Karlsruhe Institute of Technology(KIT)Eggenstein‐LeopoldshafenGermany Key Laboratory of Biorheological Science and Technology Ministry of EducationCollege of BioengineeringChongqing UniversityChongqingChina Institute of Organic Chemistry Karlsruhe Institute of Technology(KIT)KarlsruheGermany

Most of the biological processes,including cell signaling,cancer invasion,embryogenesis,or neural development,are dependent on and guided by the complex architecture and composition of cellular *** such microenvironments in cell coculture models is crucial for fundamental and applied biology *** ability to combine different cell types grown as both two‐dimensional(2D)monolayers and three‐dimensional(3D)spheroids in specific defined location inside a microculture environments is a key towards in vitro tissue modeling and towards mimicking complex in vivo cellular *** this study,we introduce and investigate a method to create in vitro models of 2D cell monolayers cocultured with 3D spheroids in defined *** demonstrate the possibility of creating such complex cellular microenvironments in a high‐throughput and automated manner by creating arrays of such droplets containing prearranged 2D and 3D cellular ***,we demonstrate an application of this approach to study paracrine propagation of Wnt signaling between 2D and 3D cellular *** method provides a general approach for the miniaturized,high‐throughput,and automated formation of complex coculture cellular microarchitectures that will be useful for mimicking various in vivo complex cellular structures and for studying complex biological processes in vitro.

关键词： invasion architectures coculture

The Distribution of Microbes along the Coast of Shanghai and its Relationship with Environmental Factors

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Asian Agricultural Research 2015年第2期7卷 80-87页

作者： Lixiang cui xianxian LI Wenhui HE College of Fisheries and Life Science Shanghai Ocean University

Microbes play multiple roles in the marine ecosystem,with a variety of functions. Luchao Port,Yangshan Port and Waigaoqiao Port are three major ports near the coast of Shanghai,and it is necessary to study the abundance and water environment of microbes. The distribution of hydrological and chemical characteristics shows that the distribution of temperature,salinity,dissolved oxygen and nutrient salt exhibit certain seasonal characteristics in the surface waters. Correlation analysis indicates that the temperature of surface waters is positively correlated with the number of microbes,but not very clear; salinity is significantly positively correlated with it; dissolved oxygen is negatively correlated with it; the correlation between nutrient salt and abundance of microbes is complicated,but not very significant( P > 0. 05).

关键词： Luchao Port,Yangshan Port,Waigaoqiao Port,Bacteria

不同冰冻血浆与红细胞比例输血方案治疗创伤失血性休克的效果分析

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系统医学 2024年第9期9卷 45-48页

作者：赵贤贤崔健济宁市第一人民医院输血科山东济宁272000 山东省戴庄医院精准医学实验室山东济宁272051

目的对不同冰冻血浆与红细胞比例输血方案治疗创伤失血性休克的效果进行分析。方法回顾性选取2021年6月—2023年6月济宁市第一人民医院接受相关治疗的84例创伤失血性休克患者的临床资料,按照不同输血方案,分为参照组(42例)及研究组(42例... 详细信息

目的对不同冰冻血浆与红细胞比例输血方案治疗创伤失血性休克的效果进行分析。方法回顾性选取2021年6月—2023年6月济宁市第一人民医院接受相关治疗的84例创伤失血性休克患者的临床资料,按照不同输血方案,分为参照组(42例)及研究组(42例)。参照组使用冰冻血浆∶红细胞比例为1∶2的输血方案对干预治疗,研究组使用冰冻血浆∶红细胞比例为1∶1的输血方案对干预治疗。对比两组输血前及输血后的凝血功能指标以及输血前、输血后的血栓弹力图(Thromboela-stogram,TEG)参数水平。结果研究组输血后的凝血功能指标水平优于参照组,差异有统计学意义(P<0.05);输血后研究组α角(68.55±5.38)°、MA(62.84±5.47)mm、K(2.63±0.61)min、R(4.37±1.33)min等TEG参数水平均优于参照组,差异有统计学意义(t=9.085、9.005、5.407、3.774,P均<0.001)。结论对创伤失血性休克患者实施1:1的冰冻血浆:红细胞输血方案可获得理想治疗效果,不仅可强化患者凝血功能,并且可在一定程度上提升患者血栓弹力图参数水平,对患者身体康复发挥着一定促进作用。

关键词：创伤失血性休克冰冻血浆红细胞住院时间凝血功能

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塔里木盆地轮南低凸起奥陶系深层天然气地球化学特征及成藏模式

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天然气工业 2023年第9期43卷 49-60页

作者：赵兴齐陈践发石杰蔡亚卢冲崔守凯王伟杨鲜鲜核工业北京地质研究院北京市100029 油气资源与工程全国重点实验室·中国石油大学(北京) 中国石油青海油田公司

塔里木盆地轮南低凸起奥陶系油气资源是深层油气勘探的重点领域之一,但目前对其天然气地球化学特征、成因及来源、成藏过程及成藏模式等缺乏系统研究。为此,基于轮南低凸起奥陶系深层天然气组分及碳同位素特征,结合该区构造演化特征、... 详细信息

塔里木盆地轮南低凸起奥陶系油气资源是深层油气勘探的重点领域之一,但目前对其天然气地球化学特征、成因及来源、成藏过程及成藏模式等缺乏系统研究。为此,基于轮南低凸起奥陶系深层天然气组分及碳同位素特征,结合该区构造演化特征、烃源岩生排烃史及油气运移输导条件,探讨了研究区奥陶系深层天然气成因及来源、分布规律及成藏模式。研究结果表明:①奥陶系深层天然气为有机成因的油型气,主要为寒武系-下奥陶统海相腐泥型烃源岩在高成熟-过成熟阶段形成的原油裂解气和干酪根降解气,但西部斜坡带及中部斜坡带西侧天然气为奥陶系早期捕获的寒武系-下奥陶统烃源岩在成熟-高成熟阶段的原油伴生气;②奥陶系油气藏具有“三期成藏、两期调整改造”和“早期聚油、晚期聚气、多期充注”的成藏特征,油气藏分布受区内不整合面、缝洞体系及断裂构造等因素联合控制,整体呈“东气西油”的分布特征;③晚期天然气主要沿轮古东走滑断裂垂向运移进入奥陶系,沿不整合面及岩溶储层自东向西侧向运移、聚集成藏,气侵强度具有自东向西逐渐减弱的特征。结论认为,奥陶系次生凝析气藏是喜马拉雅中-晚期寒武系-下奥陶统深层/超深层来源的高成熟-过成熟天然气气侵作用的结果,油气相态多样,指示研究区奥陶系及寒武系深层/超深层具有较大的油气勘探潜力。

关键词：塔里木盆地轮南低凸起奥陶系深层天然气地球化学特征成因及来源成藏模式

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提高CO_2和硝氮浓度对羽毛藻生化组成和营养盐吸收的影响

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上海海洋大学学报 2016年第2期25卷 217-222页

作者：崔丽香何文辉李鲜鲜蔡清洁张奥上海海洋大学水产与生命学院上海201306

以羽毛藻为研究材料,利用CO_2培养箱通入不同CO_2浓度的空气进行培养,探究在高浓度CO_2和高浓度硝氮条件下羽毛藻生理生化的变化。结果表明,高浓度CO_2或硝氮都能显著促进藻体的生长,高碳高氮下藻体的相对生长率比低碳低氮组高出63.77%... 详细信息

以羽毛藻为研究材料,利用CO_2培养箱通入不同CO_2浓度的空气进行培养,探究在高浓度CO_2和高浓度硝氮条件下羽毛藻生理生化的变化。结果表明,高浓度CO_2或硝氮都能显著促进藻体的生长,高碳高氮下藻体的相对生长率比低碳低氮组高出63.77%。另外,高浓度CO_2会使藻体中的叶绿素、类胡萝卜素、藻红蛋白、藻蓝蛋白、可溶性蛋白和可溶性碳水化合物的含量下降,而使硝酸还原酶活性升高,其中明显的表现为高碳低氮组叶绿素a含量比低碳低氮组降低了39.01%,高碳高氮组比低碳高氮组降低了49.26%,相应类胡萝卜素高碳组分别降低了47.62%和43.24%,增加硝氮浓度能够提高藻体中色素含量,可溶性蛋白和可溶性碳水化合物的含量;在高浓度硝氮下,提高CO_2浓度能使硝酸盐和磷酸盐的吸收率显著升高。由此得知大气CO_2浓度升高或海水富营养化会促进羽毛藻的生长,并且这两个条件的改变会对羽毛藻在生化组成和营养盐吸收方面产生深刻的影响。

关键词：羽毛藻 CO2 硝氮生化组成营养盐吸收

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