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Development of wet adhesion of honeybee arolium incorporated polygonal structure with three-phase composite interfaces

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Friction 2024年第2期12卷 215-230页

作者： lulu liang Jieliang ZHAO Qun NIU Li YU Xiangbing WU Wenzhong WANG Shaoze YAN Zhenglei YU School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Division of Intelligent and Biomechanical Systems State Key Laboratory of TribologyDepartment of Mechanical EngineeringTsinghua UniversityBeijing 100084China Key of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China

Inspired by the dynamic wet adhesive systems in nature,various artificial adhesive surfaces have been developed but still face different ***,the theoretical mechanics of wet adhesives has never been sufficiently ***,we develop a novel adhesive mechanism for governing wet adhesion and investigate the biological models of honeybee arolium for reproducing the natural wet adhesive ***-nano structures of honeybee arolium and arolium-prints were observed by Cryogenic scanning electron microscopy(Cryo-SEM),and the air pockets were found in the contact interface ***,the adhesive models with a three-phase composite interface(including air pockets,liquid secretion,and hexagonal frames of arolium),were formed to analyze the wet adhesion of honeybee *** results of theoretical calculations and experiments indicated an enhanced adhesive mechanism of the honeybee by liquid self-sucking effects and air-embolism *** these effects,normal and shear adhesion can be adjusted by controlling the proportion of liquid secretion and air pockets in the contact ***,the air-embolism effects contribute to the optimal coupling of smaller normal adhesion with greater shear adhesion,which is beneficial for the high stride frequency of *** works can provide a fresh perspective on the development of bio-inspired wet adhesive surfaces.

关键词： honeybee arolium air pockets wet adhesion a three-phase interface self-sucking effects air-embolism effects

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Dynamic Vertical Climbing Mechanism of Chinese Dragon-Li Cats Based on the Linear Inverted Pendulum Model

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Journal of Bionic Engineering 2023年第1期20卷 136-145页

作者： Qun Niu Jieliang Zhao lulu liang Jin Xing School of Mechanical Engineering Beijing Institute of TechnologyBeijing100081China

Humans have long desired but never achieved the capacity to climb *** fundamental reason is that human hands and feet cannot climb vertical walls like geckos and *** lacking an adhesive structure can use the body’s dynamic effect to climb *** we investigated the dynamic wall climbing behavior of individuals who cannot remain stationary on the vertical *** the domestic cat as the experimental object,we constructed an experimental platform as the obstacle for the cat to climb the *** research indicated that domestic cats must meet the following physical conditions to do dynamic vertical wall climbing:vertical obstacles must have nonvertical surfaces,a horizontal run-up,and contact with nonvertical surfaces before the vertical speed reduces to *** we proposed a dynamic vertical wall climbing model with three contact states based on an investigation of domestic cats’dynamic wall climbing behavior and the LIP *** motion range of the LIP model’s generalized angular coordinates varies depending on the contact *** horizontal run-up action can improve the jumping height and obtain horizontal *** making contact with the vertical surface of the obstacle,the motion inertia in the horizontal direction can produce a reaction force on the contact surface,which can compensate for the influence of some *** alternating contact strategy lets cats switch different initial and end contact *** investigation clarifies the essential process underlying animals’dynamic vertical wall climbing and establishes the theoretical foundation for the legged robot to do dynamic vertical wall climbing.

关键词： Domestic cats Dynamics Vertical climbing LIP Bionic

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Simulation-Guided Design of Bamboo Leaf-Derived Carbon-Based High-Efficiency Evaporator for Solar-Driven Interface Water Evaporation

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Energy & Environmental Materials 2022年第4期5卷 1323-1331页

作者： Yitian Wu Rui Kong Chaoliang Ma Lanze Li Yu Zheng Yingzhuo Lu lulu liang Yajun Pang Qiang Wu Zhehong Shen Hao Chen College of Chemistry and Materials Engineering Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency UtilizationNational Engineering and Technology Research Center of Woodbased Resources Comprehensive UtilizationKey Laboratory of Wood Science and Technology of Zhejiang ProvinceZhejiang A&F UniversityHangzhou 311300China

Solar interface water evaporation has been demonstrated to be an advanced method for freshwater production with high solar energy *** development of evaporators with lower cost and higher efficiency is a key challenge in the manufacture of practical solar interface water evaporation ***,a bamboo leaf-derived carbon-based evaporator is designed based on the light trace *** then,it is manufactured by vertical arrangement and carbonization of bamboo leaves and subsequent polyacrylamide *** vertically arranged carbon structure can extend the light path and increase the light-absorbing area,thus achieving excellent light ***,the continuous distribution of polyacrylamide hydrogel between these vertical carbons can support high-speed water delivery and shorten the evaporation ***,this evaporator exhibits an ultrahigh average light absorption rate of~96.1%,a good water evaporation rate of 1.75 kg m^(-2) h^(-1),and an excellent solar-to-vapor efficiency of 91.9%under one sun ***,the device based on this evaporator can effectively achieve seawater desalination,heavy metal ion removal,and dye separation while completing water *** this device is highly available for actual outdoor applications and repeated recycling.

关键词： bamboo leaf carbon materials desalination waste water treatment water evaporation

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Echinatin inhibits tumor growth and synergizes with chemotherapeutic agents against human bladder cancer cells by activating p38 and suppressing Wnt/β-catenin pathways

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Genes & Diseases 2024年第2期11卷 1050-1065页

作者： Xiaoxuan Wang Lijuan Luo Jingtao Xu Qiuping Lu Haichao Xia Yanran Huang lulu Zhang Liping Xie Habu Jiwa Shiqiong liang Xiaoji Luo Jinyong Luo Key Laboratory of Diagnostic Medicine Designated By the Chinese Ministry of Education School of Laboratory MedicineChongqing Medical UniversityChongqing 400016China Department of Orthopedics The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400042China

Bladder cancer (BC) is one of the most common malignant tumors in the urinary *** to the poor prognosis and high mortality rate of the disease,it is urgent to develop new drugs with high efficacy and low toxicity to treat *** (Ecn) is a bioactive natural flavonoid oflicorice that has attracted special attention for its promising anti-tumor ***,we explored the inhibitory effects of Echinatin on BC cells and probed the possible molecular *** found that Ecnin vitro inhibited the proliferation,migration,and invasion,arrested the cell cycle at the G2/M phase,and promoted apoptosis in BC ***,Ecn had no notable cytotoxicity towards human normal *** subsequently confirmed that Ecn restrained xenograft tumor growth and metastasis of BC cells in vivo .Mechanistically,Ecn activated the p38 signaling pathway but inactivated the Wnt/β-catenin signaling pathway,while over-expression of β-catenin and the p38 inhibitor both attenuated the inhibitory effects of Ecn on BC ***,Ecn combined with cisplatin (DDP) or gemcitabine (Gem) had synergistic inhibitory effects on BC *** summary,our results validate that Ecn inhibits the tumor growth of human BC cells via p38 and Wnt/β-catenin signaling *** meaningfully,our results suggest a potential strategy to enhance DDP- or Gem-induced inhibitory effects on BC cells by combining with Ecn.

关键词： Bladder cancer Combination chemotherapy Echinatin p38 Wnt/β-catenin

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4-Nitrocatechol as a novel matrix for low-molecular-weight compounds in situ detection and imaging in biological tissues by MALDI-MSI

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Chinese Chemical Letters 2024年第6期35卷 486-490页

作者： Hualei Xu Manman Han Haiqiang Liu liang Qin lulu Chen Hao Hu Ran Wu Chenyu Yang Hua Guo Jinrong Li Jinxiang Fu Qichen Hao Yijun Zhou Jinchao Feng Xiaodong Wang Key Laboratory of Mass Spectrometry Imaging and Metabolomics(Minzu University of China) State Ethnic Affairs CommissionBeijing 100081China College of Life and Environmental Sciences Centre for Imaging&Systems BiologyMinzu University of ChinaBeijing 100081China

Low-molecular-weight(LMW)compounds are ubiquitous in living organisms and play essential roles in biological *** direct analysis of LMW compounds in biological tissues by matrix-assisted laser desorption/ionization mass spectrometry imaging(MALDI-MSI)could provide a more comprehensive understanding of their essential ***,we evaluated 4-nitrocatechol(4-NC)as a novel positive-ion matrix for enhancing in situ detection and imaging of LMW compounds from the rat liver,brain,and germinating Chinese-yew seed by *** results showed that the 4-NC possessed remarkable features,including strong ultraviolet absorption,uniform matrix crystal,excellent chemical stability,and fewer matrix-related background *** use of 4-NC led to the successful detection of 232,218,and193 LMW compounds from the three abovementioned tissue sections,***,the use of 4-NC improved the imaging quality of LMW compounds in tissue sections through MALDI-MSI and has the potential as a matrix for MALDI tissue imaging of LMW compounds.

关键词： MALDI-MSI 4-Nitrocatechol LMW compounds In situ detection Tissue imaging

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睡眠管理APP情感化设计策略研究

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鞋类工艺与设计 2022年第20期2卷 182-184页

作者：梁璐璐山东工艺美术学院山东济南250300

文章首先对情感化设计进行概述,其次对市场现有睡眠管理APP的现状以及案例进行分析,发现目前所存在的问题,最后从情感化理念的角度出发,探究情感化在睡眠管理APP中本能层面、行为层面、反思层面的具体设计策略,从而提升产品竞争优势,为... 详细信息

文章首先对情感化设计进行概述,其次对市场现有睡眠管理APP的现状以及案例进行分析,发现目前所存在的问题,最后从情感化理念的角度出发,探究情感化在睡眠管理APP中本能层面、行为层面、反思层面的具体设计策略,从而提升产品竞争优势,为以后的睡眠管理产品设计提供参考。

关键词：情感化设计睡眠管理APP 设计策略

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基于大调制中心频率的布里渊光相关域反射技术

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中国激光 2023年第13期50卷 169-174页

作者：江岳凯路元刚姚雨果张伍军赫崇君梁璐璐南京航空航天大学空间光电探测与感知工信部重点实验室江苏南京211106 常熟理工学院电气与自动化工程学院江苏常熟215506

为了提高分布式光纤温度传感的空间分辨率,提出了一种基于大调制中心频率的外调制布里渊光相关域反射(BOCDR)新技术。笔者发现了外调制BOCDR系统中的拍频谱噪声,分析了该噪声的起因以及其对被测信号混叠的影响,并据此发现使用较大的调... 详细信息

为了提高分布式光纤温度传感的空间分辨率,提出了一种基于大调制中心频率的外调制布里渊光相关域反射(BOCDR)新技术。笔者发现了外调制BOCDR系统中的拍频谱噪声,分析了该噪声的起因以及其对被测信号混叠的影响,并据此发现使用较大的调制中心频率可以抑制拍频谱噪声对布里渊散射信号混叠的影响,从而获得较高的空间分辨率及较大的温度测量范围。利用所提出的基于大调制中心频率的BOCDR新技术,在一个验证实验中,使用一段长为17.2 m的G657光纤实现了连续分布式测量。实验结果表明,外调制BOCDR系统的空间分辨率为11.6 cm,温度的测量不确定度为0.26℃,测量不确定度比同类系统低一个数量级。

关键词：光纤光学光纤传感器分布式传感温度传感布里渊光相关域反射高空间分辨率

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乳酸乳球菌谷氨酸脱羧酶B重组质粒的构建、异源表达及酶学性质的研究

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食品科技 2023年第3期48卷 1-7页

作者：熊冰钰林伟朝梁露露张毛毛朱显峰河南大学生命科学学院生物工程研究所河南开封475004

目的:旨在研究乳酸菌谷氨酸脱羧酶B(Decarboxylation of glutamic acid,gadB)的异源表达及其酶学性质。方法:以Lactocus lactis *** Il1403的gadB基因序列为目的基因,实现gadB在大肠杆菌中的异源表达,探究其酶学性质,实现高效催化合成γ... 详细信息

目的:旨在研究乳酸菌谷氨酸脱羧酶B(Decarboxylation of glutamic acid,gadB)的异源表达及其酶学性质。方法:以Lactocus lactis *** Il1403的gadB基因序列为目的基因,实现gadB在大肠杆菌中的异源表达,探究其酶学性质,实现高效催化合成γ-氨基丁酸(γ-Aminobutyric acid,GABA)。结果:重组菌经IPTG诱导gadB过量表达后,进一步采用Ni^(2+)亲和层析纯化gadB,经SDS-PAGE分析,在54 ku处出现明显条带,经检测可溶性蛋白含量约占70%。对酶学性质进行研究,gadB的最适pH值为4.8,最适反应温度为40℃,Na^(+)和Mn^(2+)限制gadB的酶活力,而Mg^(2+)和Zn^(2+)明显刺激酶活。对酶底物浓度进行研究,谷氨酸脱羧酶B的K_(m)为123.83 mmol,V_(max)为0.79 mmol/min。结论:该研究探索了gadB的酶学性质,为基因工程菌工业化生产γ-氨基丁酸提供了实验基础。

关键词：谷氨酸脱羧酶B γ-氨基丁酸重组质粒异源表达酶学性质

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空间视野中西北县域新生代乡村教师在地化的实证分析

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中国教育学刊 2024年第5期 96-102页

作者：毛菊梁军丽王路路新疆师范大学教育科学学院新疆乌鲁木齐830017

社会加速转型更加凸显在西北地区建立一支稳定的县域新生代乡村教师队伍的重要性,教师在地化成为亟须高度关注的话题。从空间视野审视教师在地化是现实的诉求与研究的趋势。对西北县域新生代乡村教师发放15116份问卷并对数据进行多元回... 详细信息

社会加速转型更加凸显在西北地区建立一支稳定的县域新生代乡村教师队伍的重要性,教师在地化成为亟须高度关注的话题。从空间视野审视教师在地化是现实的诉求与研究的趋势。对西北县域新生代乡村教师发放15116份问卷并对数据进行多元回归分析发现,总体上西北县域新生代乡村教师在地化处于由“深度嵌入”转向“初步融入”阶段。精神空间对教师在地化影响最大;生存空间中的消费与户籍距离对教师在地化具有显著影响;离散的交往空间对教师在地化的影响微弱;权利空间中的社会参与正向作用于教师在地化。由此,针对问题提出通过组织情感促进精神空间中乡村教师在地化;通过社会资本加速交往空间中乡村教师在地化;通过宜居宜业兜底生存空间中乡村教师在地化;通过二次分权为主保障权力空间中乡村教师在地化。

关键词：西北县域新生代乡村教师教师在地化

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氢内燃机发电机ICT领域应用分析

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通信电源技术 2022年第19期39卷 33-35页

作者：梁露露陈志江刘绚中国移动通信集团设计院有限公司北京100080 中国移动通信集团采购共享服务中心北京100080

介绍了氢内燃机发电机系统的工作原理、系统构成、技术特点,分析了氢内燃机发电机的发展应用现状,并将其与氢燃料电池进行性能比较分析,对其在信息和通信技术(Information and Communication Technology,ICT)领域的应用前景进行了展望。

关键词：氢内燃机发电机技术特点发展现状通信领域

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