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Remodel the perifollicular microenvironment via Minoxidil-loaded microneedle patch and cold atmospheric plasma for treating androgenetic alopecia

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Nano Research 2024年第7期17卷 6411-6419页

作者： Hao Chen Xianzhe Tang Yueye Huang Chen Chen Yuheng Yang Chaojie Hao Wenqi Xie Tingjing Huang xiaofeng cheng Qingnan Xu Shicong Huang Zhi Ye Xucong Lin Zhaowei Chen Zhitong Chen MOE Key Laboratory for Analytical Science of Food Safety and Biology and New Cornerstone Science LaboratoryCollege of ChemistryFuzhou UniversityFuzhou 350108China Institute of Biomedical and Health Engineering Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Advanced Therapeutic Center National Innovation Center for Advanced Medical DevicesShenzhen 518000China Department of Chemistry University College LondonLondon WC1H 0AJUK Engineering Technology Research Center on Reagent and Instrument for Rapid Detection of Product Quality and Food Safety in Fujian Province College of ChemistryFuzhou UniversityFuzhou 350108China Key Laboratory of Biomedical Imaging Science and System Chinese Academy of SciencesShenzhen 518055China

Androgenetic alopecia(AGA)is a chronic and progressive form of hair loss characterized by vascular degeneration in the perifollicular microenvironment,leading to cell apoptosis and eventual loss of hair follicles(HFs).Traditional therapeutic formulations,such as Minoxidil(MXD)tincture,have limitations in reshaping the perifollicular microenvironment and exhibit limited ***,we report a multi-synergistic therapeutic platform for high-performance hair regeneration *** platform combines microneedle(MN)patches loaded with MXD-encapsulated nanostructured lipid carriers(MXD-NLC-MNs)and cold atmospheric plasma(CAP).The MNs’mechanical strength enables efficient transdermal delivery of MXD to the targeted dermal papilla cells,promoting cell ***,in collaboration with MXD,the mechanical stimulation exerted by MN application synergistically upregulates the expression of vascular endothelial growth factor,leading to ***,the transient microchannels in the skin created by MNs facilitate the transdermal delivery of CAPgenerated nitric oxide(NO)to the sites of HF lesions,whereby the synergistic interaction between MXD and NO boosts perifollicular ***,the perifollicular microenvironment can be effectively reshaped to accelerate hair regeneration in AGA murine *** multi-synergistic combination therapy strategy would hold great promise for effectively treating AGA and promoting hair regrowth.

关键词： nanomedicine androgenetic alopecia microneedle cold atmospheric plasma drug delivery

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Bacterial microcompartment-mimicking Pickering emulsion droplets for detoxification of chemical threats under sweet conditions

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Science China Chemistry 2024年第9期67卷 3039-3049页

作者： Xiao Xu Wenqi Xie Ting Wu Chen Chen Xiaoning Chen Yuheng Yang Hao Lian Hao Chen xiaofeng cheng Zhitong Chen Guojun Chen Chaoqun Liu Lanlan Chen Yu He Zhaowei Chen Bernard P.Binks Huanghao Yang New Cornerstone Science Laboratory MOE Key Laboratory for Analytical Science of Food Safety and Biology College of ChemistryFuzhou University Institute of Biomedical and Health Engineering Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Department of Biomedical Engineering and the Rosalind & Morris Goodman Cancer Research Institute Mc Gill University School of Pharmacy Henan University Department of Chemistry University of Hull

Chemical warfare agents represent a severe threat to mankind and their efficient decontamination is a global necessity. However,traditional disposal strategies have limitations, including high energy consumption, use of aggressive reagents and generation of toxic byproducts. Here, inspired by the compartmentalized architecture and detoxification mechanism of bacterial microcompartments, we constructed oil-in-water Pickering emulsion droplets stabilized by hydrogen-bonded organic framework immobilized cascade enzymes for decontaminating mustard gas simulant(2-chloroethyl ethyl sulfide, CEES) under sweet conditions. Two exemplified droplet systems were developed with two-enzyme(glucose oxidase/chloroperoxidase) and threeenzyme(invertase/glucose oxidase/chloroperoxidase) cascades, both achieving over 6-fold enhancement in decontamination efficiency compared with free enzymes and >99% selectivity towards non-toxic sulfoxide. We found that the favored mass transfer of sugars and CEES from their respective phases to approach the cascade enzymes located at the droplet surface and the facilitated substrate channeling between proximally immobilized enzymes were key factors in augmenting the decontamination efficacy. More importantly, the robustness of immobilized enzymes enabled easy reproduction of both the droplet formation and detoxification performance over 10 cycles, following long-term storage and in far-field locations.

关键词： Pickering emulsion biomimetics chemical warfare agent bacterial microcompartment biocatalysis

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生活环境主义视角下山地农村生态治理的社会机制——基于云南诺村案例

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南京林业大学学报（人文社会科学版） 2024年第2期24卷 97-107页

作者：成霄峰中国社会科学院大学社会与民族学院

农村生态治理是生态文明建设的重要内容。治理农村的环境问题需要从居民日常生活的角度出发,促进农村社区或居民成为生态治理的主体。生活环境主义基于生活者的角度看待环境问题,并通过激发生活者的智慧以解决问题,为农村环境问题提供... 详细信息

农村生态治理是生态文明建设的重要内容。治理农村的环境问题需要从居民日常生活的角度出发,促进农村社区或居民成为生态治理的主体。生活环境主义基于生活者的角度看待环境问题,并通过激发生活者的智慧以解决问题,为农村环境问题提供了治理方向。以该理论为分析框架,通过对云南诺村建立水源林历程的分析发现:诺村的生产生活方式与地方环境资源有着紧密的联系,其生态治理是在村民小组层面的共同体行动;水与森林资源具有公共性,为村民共同占有、使用,从而赋予村民参与治理的权利与身份;村民会议是整合村民不同利益诉求、“说法”的平台,村民通过博弈达成保护环境的共识;在实践层面,诺村基于生活常识而形成治理规则,并依托村社共同体进行监督和制裁。以农村社区为主体、地方性知识为基础的生态治理,可为我国西部山地农村的生态文明建设及社会治理现代化提供借鉴。

关键词：农村生态治理生活环境主义村社共同体水资源保护

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毕赤酵母表达食琼脂火色杆菌褐藻胶裂解酶

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食品科技 2024年第6期49卷 19-25页

作者：程志钱程晓峰涂红艳冯青青程功湖州检验检疫综合技术服务中心浙江湖州313000 安徽农业大学动物科技学院安徽合肥230036 合肥市动物疫病预防控制中心安徽合肥230601 中国科学院过程工程研究所生化工程国家重点实验室北京100190

选择食琼脂火色杆菌(Flammeovirga agarivorans)的潜在褐藻胶裂解酶基因,对其进行序列优化及全基因合成,在毕赤酵母(Pichia pastoris)中进行分泌表达。摇瓶诱导表达产物的蛋白浓度为0.23 mg/mL。表达的褐藻胶裂解酶最适pH值为9.0,最适... 详细信息

选择食琼脂火色杆菌(Flammeovirga agarivorans)的潜在褐藻胶裂解酶基因,对其进行序列优化及全基因合成,在毕赤酵母(Pichia pastoris)中进行分泌表达。摇瓶诱导表达产物的蛋白浓度为0.23 mg/mL。表达的褐藻胶裂解酶最适pH值为9.0,最适温度为40℃,在该条件下的酶活力达400.00 U/mL。该酶在40℃及以下时较稳定。底物特异性分析结果显示,该酶对聚甘露糖醛酸及聚古罗糖醛酸均有水解能力,但对聚古罗糖醛酸的水解能力更强。利用该酶水解褐藻酸钠并使用高效液相色谱及质谱方法对产物进行了分析,结果显示,产物主要为聚合度2~4的褐藻寡糖。研究获得的褐藻胶裂解酶可用于褐藻寡糖的酶法规模制备。

关键词：食琼脂火色杆菌褐藻胶裂解酶毕赤酵母褐藻寡糖

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基于材料替换的船用液压油缸轻量化设计

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中国修船 2024年第4期37卷 49-53页

作者：程晓峰甘沐阳郑康肖玉红湖北工程职业学院智能制造学院湖北黄石435000

为了降低某船用液压油缸的重量,通过材料替换与结构优化对液压油缸缸筒进行相关设计。文章首先根据静力学及灵敏度分析对原有结构进行Q345B材料替换,其次以降低缸筒重量为优化目标,在材料应力及油缸变形等约束条件下,采用基于中心复合设... 详细信息

为了降低某船用液压油缸的重量,通过材料替换与结构优化对液压油缸缸筒进行相关设计。文章首先根据静力学及灵敏度分析对原有结构进行Q345B材料替换,其次以降低缸筒重量为优化目标,在材料应力及油缸变形等约束条件下,采用基于中心复合设计(CCD)的响应面优化方法,对液压油缸进行了结构优化设计。分析结果表明,在满足壁厚校核情况下,与原结构相比,油缸减重约4.83%,为后期船用液压油缸的结构设计提供一定基础。

关键词：液压油缸轻量化材料替换结构优化

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Non-synchronous vibration of rotor blade in a six-stage transonic compressor

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Chinese Journal of Aeronautics 2024年第8期37卷 36-48页

作者： Ronghui cheng Zhuo WANG Huawei YU Lin DU Yi ZHANG xiaofeng SUN Aeroengine Research Institute Beihang UniversityBeijing 102206China School of Energy and Power Engineering Beihang UniversityBeijing 102206China

This paper presents an experimental study on the Non-Synchronous Vibration(NSV)in a six-stage transonic *** first part of the paper describes the NSV phenomenon of Rotor 1,which occurs when both Stator 1(S1)and Stator 2(S2)or S1 only are *** measurements and analysis are carried out for the former case through the unsteady wall pressure and the Blade Strain(BS).The spinning mode theory used in the rotor/stator interaction noise is employed to explain the relation between the circumferential wave number of the aerodynamic disturbance and the Nodal Diameter(ND)of the blade *** variations of the vibration amplitudes of different blades and the Inter-Blade Phase Angles(IBPAs)at different moments suggest that the evolution of NSV is a highly nonuniform phenomenon along the circumferential *** addition,the difference between the wall-pressure spectra generated by the NSV and the classic flutter has been *** the second part,the variations of aerodynamic loading due to the adjustment of the staggers of the Inlet Guide Vane(IGV),S1 and S2 have been *** is found that closing S1 only can result in a great fluctuation to the performance of the front stages,which might be detrimental to the flow organization and increase the risk of *** contrast,the effect of closing S2 only on the performance of the first two stages appears to be slighter relatively.

关键词： Transonic compressor Non-synchronous vibration Modal analysis Aerodynamic loading Nodal diameter

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HEN:a novel hybrid explainable neural network based framework for robust network intrusion detection

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Science China(Information Sciences) 2024年第7期67卷 72-90页

作者： Wei WEI Sijin CHEN Cen CHEN Heshi WANG Jing LIU Zhongyao cheng xiaofeng ZOU School of Computer Science and Engineering Xi'an University of TechnologyShaanxi Key Laboratory for Network Computing and Security Technology School of Computer Science and Technology Wuhan University of Science and Technology School of Future Technology South China University of Technology Shenzhen Research Institute of Hunan University School of Computer Science Hunan University of Technology and Business Institute for Infocomm Research (I2R) Agency for Science Technology and Reseach (A*STAR)

With the rapid development of network technology and the automation process for 5G, cyberattacks have become increasingly complex and threatening. In response to these threats, researchers have developed various network intrusion detection systems(NIDS) to monitor network traffic. However, the incessant emergence of new attack techniques and the lack of system interpretability pose challenges to improving the detection performance of NIDS. To address these issues, this paper proposes a hybrid explainable neural network-based framework that improves both the interpretability of our model and the performance in detecting new attacks through the innovative application of the explainable artificial intelligence(XAI)method. We effectively introduce the Shapley additive explanations(SHAP) method to explain a light gradient boosting machine(Light GBM) model. Additionally, we propose an autoencoder long-term short-term memory(AE-LSTM) network to reconstruct SHAP values previously generated. Furthermore, we define a threshold based on reconstruction errors observed during the training phase. Any network flow that surpasses the specified threshold is classified as an attack flow. This approach enhances the framework's ability to accurately identify attacks. We achieve an accuracy of 92.65%, a recall of 95.26%, a precision of 92.57%,and an F1-score of 93.90% on the dataset NSL-KDD. Experimental results demonstrate that our approach generates detection performance on par with state-of-the-art methods.

关键词： explainable artificial intelligence light gradient boosting machine machine learning network intrusion detection Shapley additive explanation hybrid explainable neural network (HEN)

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A Multi-Constraint Path Optimization Scheme Based on Information Fusion in Software Defined Network

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Computers, Materials & Continua 2024年第4期79卷 1399-1418页

作者： Jinlin Xu Wansu Pan Longle cheng Haibo Tan Munan Yuan xiaofeng Li Hefei Institutes of Physical Science Chinese Academy of SciencesHefei230031China University of Science and Technology of China Hefei230026China

The existingmultipath routing in Software Defined Network (SDN) is relatively blind and inefficient, and there is alack of cooperation between the terminal and network sides, making it difficult to achieve dynamic adaptationof service requirements and network resources. To address these issues, we propose a multi-constraint pathoptimization scheme based on information fusion in SDN. The proposed scheme collects network topology andnetwork state information on the network side and computes disjoint paths between end hosts. It uses the FuzzyAnalytic Hierarchy Process (FAHP) to calculate the weight coefficients of multiple constrained parameters andconstructs a composite quality evaluation function for the paths to determine the priority of the disjoint paths. TheSDN controller extracts the service attributes by analyzing the packet header and selects the optimal path for flowrule forwarding. Furthermore, the service attributes are fed back to the path composite quality evaluation function,and the path priority is dynamically adjusted to achieve dynamic adaptation between service requirements andnetwork status. By continuously monitoring and analyzing the service attributes, the scheme can ensure optimalrouting decisions in response to varying network conditions and evolving service demands. The experimentalresults demonstrated that the proposed scheme can effectively improve average throughput and link utilizationwhile meeting the Quality of Service (QoS) requirements of various applications.

关键词： SDN multi-constraint path information fusion FAHP

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Ultra-robust informational metasurfaces based on spatial coherence structures engineering

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Light(Science & Applications) 2024年第7期13卷 1310-1319页

作者： Leixin Liu Wenwei Liu Fei Wang xiaofeng Peng Duk-Yong Choi Hua cheng Yangjian Cai Shuqi Chen Shandong Provincial Engineering and Technical Center of Light Manipulations Collaborative Innovation Center of Light Manipulation and ApplicationsShandong Provincial Key Laboratory of Optics and Photonic DeviceSchool of Physics and ElectronicsShandong Normal UniversityJinan 250014China. The Key Laboratory of Weak Light Nonlinear Photonics Ministry of EducationSchool of PhysicsSchool of Materials Science and EngineeringSmart Sensing Interdisciplinary Science CenterNankai UniversityTianjin 300071China. School of Physical Science and Technology Soochow UniversitySuzhou 215006China. Laser Physics Centre Research School of PhysicsAustralian National UniversityCanberraACT 2601Australia. The Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuanShanxi 030006China

Optical information transmission is vital in modern optics and photonics due to its concurrent and multi-dimensional nature,leading to tremendous applications such as optical microscopy,holography,and optical *** optical information transmission technologies suffer from bulky optical setup and information loss/crosstalk when meeting scatterers or obstacles in the light ***,we theoretically propose and experimentally realize the simultaneous manipulation of the coherence lengths and coherence structures of the light beams with the disordered *** ultra-robust optical information transmission and self-reconstruction can be realized by the generated partially coherent beam with modulated coherence structure even 93%of light is recklessly obstructed during light transmission,which brings new light to robust optical information transmission with a single *** method provides a generic principle for the generalized coherence manipulation on the photonic platform and displays a variety of functionalities advancing capabilities in optical information transmission such as meta-holography and imaging in disordered and perturbative media.

关键词： optics coherent holography

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FPSblo:A Blockchain Network Transmission Model Utilizing Farthest Point Sampling

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Computers, Materials & Continua 2024年第2期78卷 2491-2509页

作者： Longle cheng Xiru Li Shiyu Fang Wansu Pan He Zhao Haibo Tan xiaofeng Li Hefei Institutes of Physical Science Chinese Academy of SciencesHefei230031China University of Science and Technology of China Hefei230026China

Peer-to-peer(P2P)overlay networks provide message transmission capabilities for blockchain *** data transmission efficiency in P2P networks can greatly enhance the performance of blockchain ***,traditional blockchain P2P networks face a common challenge where there is often a mismatch between the upper-layer traffic requirements and the underlying physical network *** mismatch results in redundant data transmission and inefficient routing,severely constraining the scalability of blockchain *** address these pressing issues,we propose FPSblo,an efficient transmission method for blockchain *** inspiration for FPSblo stems from the Farthest Point Sampling(FPS)algorithm,a well-established technique widely utilized in point cloud image *** this work,we analogize blockchain nodes to points in a point cloud image and select a representative set of nodes to prioritize message forwarding so that messages reach the network edge quickly and are evenly ***,we compare our model with the Kadcast transmission model,which is a classic improvement model for blockchain P2P transmission networks,the experimental findings show that the FPSblo model reduces 34.8%of transmission redundancy and reduces the overload rate by 37.6%.By conducting experimental analysis,the FPS-BT model enhances the transmission capabilities of the P2P network in blockchain.

关键词： Blockchain P2P networks scalability farthest point sampling

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