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Hollow Gradient-Structured Iron-Anchored Carbon Nanospheres for Enhanced Electromagnetic Wave Absorption

Nano-Micro Letters 2023年第1期15卷 144-160页

作者： Cao Wu Jing Wang Xiaohang Zhang Lixing Kang Xun Cao Yongyi Zhang Yutao Niu Yingying Yu huili fu Zongjie Shen Kunjie Wu Zhenzhong Yong Jingyun Zou Bin Wang Zhou Chen Zhengpeng Yang Qingwen Li Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123JiangsuPeople’s Republic of China School of Science Nanchang Institute of TechnologyNanchang 330099JiangxiPeople’s Republic of China Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Jiangxi Institute of NanotechnologyNanchang 330200JiangxiPeople’s Republic of China School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026AnhuiPeople’s Republic of China School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Physical Science and TechnologySuzhou University of Science and TechnologySuzhou 215009People’s Republic of China School of Mechanical and Power Engineering Nanjing Tech UniversityNanjing 211800People’s Republic of China Henan Key Laboratory of Materials On Deep-Earth Engineering School of Materials Science and EngineeringHenan Polytechnic UniversityJiaozuo 454003People’s Republic of China College of Safety Science and Engineering Xi’an University of Science and TechnologyXi’an 710054People’s Republic of China

In the present paper,a microwave absorber with nanoscale gradient structure was proposed for enhancing the electromagnetic absorption performance.The inorganic-organic competitive coating strategy was employed,which can effectively adjust the thermodynamic and kinetic reactions of iron ions during the solvothermal process.As a result,Fe nanoparticles can be gradually decreased from the inner side to the surface across the hollow carbon shell.The results reveal that it offers an outstanding reflection loss value in combination with broadband wave absorption and flexible adjustment ability,which is superior to other relative graded distribution structures and satisfied with the requirements of lightweight equipment.In addition,this work elucidates the intrinsic microwave regulation mechanism of the multiscale hybrid electromagnetic wave absorber.The excellent impedance matching and moderate dielectric parameters are exhibited to be the dominative factors for the promotion of microwave absorption performance of the optimized materials.This strategy to prepare gradient-distributed microwave absorbing materials initiates a new way for designing and fabricating wave absorber with excellent impedance matching property in practical applications.

关键词： Gradient structures Carbon nanospheres Electromagnetic wave absorption Impedance matching

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All Binder-Free Electrodes for High-Performance Wearable Aqueous Rechargeable Sodium-Ion Batteries

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Nano-Micro Letters 2019年第4期11卷 766-777页

作者： Bing He Ping Man Qichong Zhang huili fu Zhenyu Zhou Chaowei Li Qiulong Li Lei Wei Yagang Yao Division of Advanced Nanomaterials Key Laboratory of Nanodevices and ApplicationsJoint Key Laboratory of Functional Nanomaterials and DevicesCAS Center for Excellence in NanoscienceSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123People’s Republic of China National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional Materialsand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093People’s Republic of China School of Nano Technology and Nano Bionics University of Science and Technology of ChinaHefei 230026People’s Republic of China Division of Nanomaterials Suzhou Institute of Nano-Tech and Nano-BionicsNanchangChinese Academy of SciencesNanchang 330200People’s Republic of China School of Electrical and Electronic Engineering Nanyang Technological University50 Nanyang AvenueJurong West 639798Singapore

Extensive efforts have recently been devoted to the construction of aqueous rechargeable sodium-ion batteries(ARSIBs)for large-scale energy-storage applications due to their desired properties of abundant sodium resources and inherently safer aqueous electrolytes.However,it is still a significant challenge to develop highly flexible ARSIBs ascribing to the lack of flexible electrode materials.In this work,nanocube-like KNiFe(CN)6(KNHCF)and rugby balllike NaTi2(PO4)3(NTP)are grown on carbon nanotube fibers via simple and mild methods as the flexible binder-free cathode(KNHCF@CNTF)and anode(NTP@CNTF),respectively.Taking advantage of their high conductivity,fast charge transport paths,and large accessible surface area,the as-fabricated binder-free electrodes display admirable electrochemical performance.Inspired by the remarkable flexibility of the binder-free electrodes and the synergy of KNHCF@CNTF and NTP@CNTF,a high-performance quasi-solid-state fiber-shaped ARSIB(FARSIB)is successfully assembled for the first time.Significantly,the as-assembled FARSIB possesses a high capacity of 34.21 mAh cm?3 and impressive energy density of 39.32 mWh cm?3.More encouragingly,our FARSIB delivers superior mechanical flexibility with only 5.7%of initial capacity loss after bending at 90°for over 3000 cycles.Thus,this work opens up an avenue to design ultraflexible ARSIBs based on all binder-free electrodes for powering wearable and portable electronics.

关键词： Carbon nanotube fiber Binder-free electrode Flexibility Aqueous rechargeable energy-storage device Sodium-ion battery

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理性情绪行为干预对老年心绞痛合并睡眠障碍患者的影响

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国际精神病学杂志 2024年第2期51卷 635-638页

作者：李闰梅麦苗符惠丽梁石英陈玉柳海南医学院第一附属医院心血管内一科海口570102

目的观察理性情绪行为干预对老年冠心病心绞痛合并睡眠障碍患者睡眠质量的效果。方法选择2021年1月~2022年12月我院的冠心病心绞痛合并睡眠障碍病例120例为观察样本,以随机数字表法划归为60例试验组、60例对照组,对照组按常规护理法施护... 详细信息

目的观察理性情绪行为干预对老年冠心病心绞痛合并睡眠障碍患者睡眠质量的效果。方法选择2021年1月~2022年12月我院的冠心病心绞痛合并睡眠障碍病例120例为观察样本,以随机数字表法划归为60例试验组、60例对照组,对照组按常规护理法施护,试验组于此基础之上引入理性情绪行为干预机制,对两组干预后的各观察指标进行比较。结果试验组患者的心理复原力评分、总体幸福感评分高于对照组,睡眠质量评分低于对照组(P<0.05)。结论在老年冠心病心绞痛合并睡眠障碍患者中引入理性情绪行为干预机制,利于其心理复原力、总体幸福感、睡眠质量的提升。

关键词：理性情绪行为老年冠心病心绞痛睡眠障碍

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构建风险模型预测慢性心力衰竭患者发生院内获得性肺炎的风险

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热带医学杂志 2024年第4期24卷 574-578页

作者：麦苗张园园李闰梅符惠丽海南医学院第一附属医院心内科海南海口570102

目的分析慢性心力衰竭患者发生院内获得性肺炎的情况,构建logistic风险预测模型。方法收集2018年1月-2022年3月在海南医学院第一附属医院心血管内科住院治疗的652例慢性心力衰竭患者的临床资料,分析慢性心力衰竭患者发生院内获得性肺炎... 详细信息

目的分析慢性心力衰竭患者发生院内获得性肺炎的情况,构建logistic风险预测模型。方法收集2018年1月-2022年3月在海南医学院第一附属医院心血管内科住院治疗的652例慢性心力衰竭患者的临床资料,分析慢性心力衰竭患者发生院内获得性肺炎病原菌分布,单因素及多因素logistic回归分析慢性心力衰竭患者发生院内获得性肺炎的危险因素,采用logistic回归分析建立慢性心力衰竭患者发生院内获得性肺炎风险预测模型,采用受试者工作特征(ROC)曲线评估该模型的预测效果。结果652例病例中有123例发生院内获得性肺炎,感染病原菌以革兰阴性菌为主(68.10%)。单因素和多因素logistic回归分析结果显示,年龄≥75岁(OR=1.586,95%CI:1.011~2.488)、心力衰竭控制超过3 d(OR=1.718,95%CI:1.042~2.834)、使用无创呼吸机>3 d(OR=1.613,95%CI:1.014~2.565)、合并中等量以上胸腔积液(OR=1.634,95%CI:1.057~2.525)、合并吞咽功能障碍[OR=4.580,95%CI:2.467~8.499)]及住院时间>7 d(OR=1.853,95%CI:1.126~3.051)是慢性心力衰竭患者发生院内获得性肺炎的独立危险因素。回归模型拟合度良好(Hosmer-Leme-show检验,χ^(2)=9.755,P=0.203),预测发生院内获得性肺炎具有良好的预测效能(AUC=0.735,95%CI:0.687~0.782)。结论年龄、心力衰竭控制时间、使用无创呼吸机时间、胸腔积液、吞咽功能障碍及住院时间均是慢性心力衰竭患者发生院内获得性肺炎的影响因素,通过建立多因素logistic风险预测模型可较准确预测慢性心力衰竭患者发生院内获得性肺炎的发生,进而指导临床干预工作。

关键词：慢性心力衰竭院内获得性肺炎风险预测模型

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A review of physicochemical properties of dissolved organic carbon and its impact over mountain glaciers

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Journal of Mountain Science 2024年第1期21卷 1-19页

作者： NIU Hewen CHEN Mengxue KANG Shichang SHUKLA Tanuj QIN huili GAO Wanni HUANG Shihai ZHANG fu State Key Laboratory of Cryospheric Sciences/National Field Science Observation and Research Station of Yulong Snow Mountain Cryosphere and Sustainable Development Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China School of Politics and International Relations Lanzhou UniversityLanzhou 730000China University of Chinese Academy of Sciences Beijing 10049China Dagu Glacier Scenic and Historic Interest Area Administration Luhua TownHeishui 615715China

Investigating the characteristics and transformation of water-soluble carbonaceous matter in the cryosphere regions is important for understanding biogeochemical process in the earth system.Water-soluble carbonaceous matter is a heterogeneous mixture of organic compounds that is soluble in aquatic environments.Despite its importance,we still lack systematic understanding for dissolved organic carbon(DOC)in several aspects including exact chemical composition and physical interactions with microorganisms,glacier meltwater.This review presents the chemical composition and physical properties of glacier DOC deposited through anthropogenic emission,terrestrial,and biogenic sources.We present the molecular composition of DOC and its effect over snow albedo and associated radiative forcings.Results indicate that DOC in snow/ice is made up of aromatic protein-like species,fulvic acid-like materials,and humic acid-like materials.Light-absorbing impurities in surface snow and glacier ice cause considerable albedo reduction and the associated radiative forcing is definitely positive.Water-soluble carbonaceous matter dominated the carbon transport in the high-altitude glacial area.Owing to prevailing global warming and projected increase in carbon emission,the glacial DOC is expected to release,which will have strong underlying impacts on cryosphere ecosystem.The results of this work have profound implications for better understanding the carbon cycle in high altitude cryosphere regions.A new compilation of globally distributed work is required,including large-scale measurements of glacial DOC over high-altitude cryosphere regions,to overcome and address the scientific challenges to constrain climate impacts of light-absorbing impurities related processes in Earth system and climate models.

关键词： Mountain glaciers Dissolved organic carbon Molecular composition Radiative forcing

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Microglial glutaminase 1 mediates chronic restraint stress-induced depression-like behaviors and synaptic damages

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Signal Transduction and Targeted Therapy 2024年第1期9卷 40-43页

作者： huili Chen Shengyang fu Xiangyu Li Meng Shi Jiazhen Qian Shu Zhao Ping Yuan Lu Ding Xiaohuan Xia Jialin C.Zheng Center for Translational Neurodegeneration and Regenerative Therapy Tongji Hospital affiliated to Tongji University School of Medicine200065 ShanghaiChina Department of Cardio-Pulmonary Circulation Shanghai Pulmonary HospitalSchool of MedicineTongji UniversityShanghaiChina Translational Research Institute of Brain and Brain-Like Intelligence Shanghai Fourth People’s Hospital affiliated to Tongji University School of Medicine200434 ShanghaiChina

Dear Editor,Major depressive disorder(MDD)is one of the most common psychiatric illnesses that significantly increase the risk of suicide.1 Stress-triggered dysfunctions of microglia have been identified as a commonly occurred pathological feature of MDD.1–3 Microglial dysfunction contributes to the pathogenesis of MDD via immunoresponses/neuroinflammation-mediated neural damage and pathological synapse loss-mediated neural circuit disruption.1 Although the involvement of microglia in MDD has been widely investigated,the molecular mechanisms underlying microglial dysfunction remain largely unknown.Recently,we identified glutaminase 1(Gls1)as one key protein that participates in microglial dysfunction.4–6 Gls1 catalyzes the hydrolysis of glutamine to produce glutamate in the brain.4 Besides its well-known role in excitatory neurotoxicity,we found Gls1 up-regulation in microglia in animal models of Alzheimer’s disease and ischemic stroke.4,7 Gls1 activates microglia to overproduce cytokines and release inflammatory extracellular vesicles,therefore leading to neuroinflammation in animal models of Alzheimer’s disease and ischemic stroke.4–6 More importantly,Gls1 has been found to be up-regulated in the brains of MDD patients,and microglial Gls1 deficiency mitigated LPS-induced depression-like behaviors.8 However,LPS exposure is not an appropriate model to mimic MDD phenotypes,leaving the involvement of Gls1 in MDD an undetermined question.

关键词： involvement inflammation media

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珊瑚钙质砂导热系数测定及预测模型研究

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岩土工程学报 2023年第S1期45卷 71-74页

作者：车东泽曾召田林铭宇杨成琳付慧丽桂林理工大学土木与建筑工程学院广西桂林541004 桂林理工大学广西岩土力学与工程重点实验室广西桂林541004

利用热探针法测得了不同含水率条件下珊瑚钙质砂的导热系数,采用Johansen模型和Chen模型对珊瑚钙质砂的导热系数进行了预测计算,并结合试验实测值对模型参数进行修正,尝试寻找出合适的预测模型对珊瑚钙质砂导热系数进行有效的模拟计算... 详细信息

利用热探针法测得了不同含水率条件下珊瑚钙质砂的导热系数,采用Johansen模型和Chen模型对珊瑚钙质砂的导热系数进行了预测计算,并结合试验实测值对模型参数进行修正,尝试寻找出合适的预测模型对珊瑚钙质砂导热系数进行有效的模拟计算。研究结果表明:珊瑚钙质砂的导热系数随含水率的增加呈现出线性递增趋势;Johansen模型和Chen模型的预测值均与试验实测值存在较大偏差;改进的Johansen模型和Chen模型预测值均与试验实测值较为接近,均方根误差值(Root-mean-square error)小于0.05,可用来预测珊瑚钙质砂的导热系数,且计算精度较高。

关键词：珊瑚钙质砂导热系数 Johansen模型 Chen模型模型参数修正

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用于基因传递系统控制释放的可生物降解高分子材料

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高分子学报 2009年第2期19卷 97-103页

作者：付慧莉程巳雪卓仁禧武汉大学化学与分子科学学院生物医用高分子材料教育部重点实验室武汉430072

综述了用于基因传递系统控制释放的各类高分子材料包括天然高分子及其衍生物、合成高分子,并介绍了它们在基因治疗和组织工程领域中的应用.

关键词：可生物降解高分子基因传递组织工程

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不同水泥掺量胶结钙质砂的导热性能及微观结构分析

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土木与环境工程学报（中英文） 2023年第4期45卷 65-73页

作者：曾莎莎莫红艳谷建晓曾召田付慧丽梁珍桂林理工大学广西岩土力学与工程重点实验室广西桂林541004 温州理工学院建筑与能源工程学院浙江温州325027

钙质砂的导热性能影响周围土体的传热过程,引起不同环境温度下钙质砂的工程力学性能变化及灾害效应。基于热针法分析5种不同水泥掺量(P_(s)=5%、7.5%、10%、12.5%、15%)胶结钙质砂的导热系数变化规律,利用SEM、MIP、NMR技术综合揭示该... 详细信息

钙质砂的导热性能影响周围土体的传热过程,引起不同环境温度下钙质砂的工程力学性能变化及灾害效应。基于热针法分析5种不同水泥掺量(P_(s)=5%、7.5%、10%、12.5%、15%)胶结钙质砂的导热系数变化规律,利用SEM、MIP、NMR技术综合揭示该过程中胶结钙质砂微观孔隙结构变化的本质特征,在此基础上阐释热特性演化的微观机理。试验结果表明:胶结钙质砂的导热系数λ随水泥掺量P_(s)的增大而递增,P_(s)小于10%时,λ呈线性递增,P_(s)大于10%时,λ增长缓慢;随着水泥掺量P_(s)的增大,胶结钙质砂中孔隙数量越来越少,孔隙占比下降明显,但P_(s)增大到10%后,总孔隙面积、孔隙数量、孔隙率等微孔隙结构参数变化减缓;不同水泥掺量胶结钙质砂的导热系数λ与其微观孔隙结构变化呈负相关关系,本质原因在于凝胶状的水泥水化产物连续填充了胶结钙质砂孔隙,降低了其孔隙率,改善了砂样内部传热,宏观表现为其导热系数λ随水泥掺量P_(s)的增大而增大。

关键词：胶结钙质砂导热系数水泥掺量孔隙结构微观机理

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木质素/聚氨酯复合膜的制备与表征

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武汉工程大学学报 2022年第4期44卷 403-407页

作者：朱青美张妍婧付慧莉蒋灿武汉工程大学材料科学与工程学院湖北武汉430205

为探讨木质素/聚氨酯复合膜用做伤口敷料的可行性,将亲水型聚氨酯与Kraft木质素用溶剂分散和溶剂浇注挥发法制备了木质素/聚氨酯复合膜,并对复合膜进行了结构、外观及表面形貌、力学性能以及吸水性能的表征。结果表明,木质素/聚氨酯复... 详细信息

为探讨木质素/聚氨酯复合膜用做伤口敷料的可行性,将亲水型聚氨酯与Kraft木质素用溶剂分散和溶剂浇注挥发法制备了木质素/聚氨酯复合膜,并对复合膜进行了结构、外观及表面形貌、力学性能以及吸水性能的表征。结果表明,木质素/聚氨酯复合膜制备成功,表面光滑、质地均一;复合膜在干燥与湿润的状态下均表现出良好的力学性能:抗张强度分别为(9.4±1.6)MPa和(0.3±0.2)MPa,断裂伸长率分别为(1107±67)%和(274±182)%;在去离子水中浸泡24 h后,木质素/聚氨酯复合膜的吸水率达(553.7±16.9)%,溶胀率为(653.7±16.9)%。所制备的木质素/聚氨酯复合膜满足伤口敷料的基本需求,是一种极具潜力的伤口敷料候选材料。

关键词：聚氨酯木质素复合膜伤口敷料

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