检索结果-内蒙古大学图书馆

The regulation of biothiol-responsive performance and bioimaging application of benzo[c]oxadiazole dyes

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第11期31卷 2891-2896页

作者： Dongyang Li Weijie Chen Sheng Hua Liu Xiaoqiang Chen Jun Yin Key Laboratory of Pesticide and Chemical Biology.Ministry of Education Hubei International Scientific and Technological Cooperation Base of Pesticide and Green SynthesisInternational Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringJiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech UniversityNanjing 211816China

The different oxidation states of sulphur atom play a significant role on functional *** this work,a aryl-thioether and its sulphone substituted benzo[c][1,2,5]oxadiazole dyes were synthesized and utilized to determine thiol-containing amino *** result of selectivity experiments showed they detected the cysteine and homocysteine under physiological condition with negligible interference from other amino *** comparison to the thioether dye,the sulphone-based dye exhibited much faster response time for Cys and ***,the sulphone restricted its thiol-reactivity and bioimaging performance in living *** reducing the oxidation state of sulphur atom,we amazedly found that the sulfoxide-based dye still maintained high selectivity ultrafast response time for Cys/Hcy under physiological *** was worth mentioning that it also had high reactivity and good bioimaging performance that sulfone compounds did not have.

关键词： Benzo[c][1,2,5]oxadiazole dye Sulfoxide Sulphone Thiol response

Antagonism between ambient ozone increase and urbanization-oriented population migration on Chinese cardiopulmonary mortality

学校读者我要写书评

暂无评论

The Innovation 2023年第6期4卷 48-58页

作者： Haitong Zhe Sun Junchao Zhao Xiang Liu Minghao Qiu Huizhong Shen Serge Guillas Chiara Giorio Zosia Staniaszek Pei Yu Michelle W.L.Wan Man Mei Chim Kim Robin van Daalen Yilin Li Zhenze Liu Mingtao Xia Shengxian Ke Haifan Zhao Haikun Wang Kebin He Huan Liu Yuming Guo Alexander T.Archibald lYusuf Hamied Department of Chemistry University of CambridgeCambridge CB21EWUK Department of Earth Sciences University of CambridgeCambridge CB23EQUK Department of Environmental Health and Engineering Johns Hopkins Bloomberg School of Public HealthBaltimoreMD 21205USA State Key Joint Laboratory of ESPC State Environmental Protection Key Laboratory of Sources and Control of Air Pollution ComplexSchool of EnvironmentTsinghua UniversityBejing 100084China School of Atmospheric Sciences Nanjing UniversityNanjing 210023China Department of Earth System Science Stanford UniversityStanfordCA 94305USA School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518p55China Department of Statistical Science University College LondonLondon WC1E 6BTUK The Alan Turing Institute London NW12DBUK School of Public Heath and Preventive Medicine Monash UniversityMelboumeVIC 3004Australia British Heart Foundation Cardiovascular Epidemiology Unit Department of Public Health and Primary CareUniversity of CambridgeCambridge CB18RNUK Heart and Lung Research Institute University of CambridgeCambridge CB20BDUK Baroelona Supercomputing Center Department of Earth Sciences08034 BarcelonaSpain School of Environmental Science and Engineering Nanjing University of Information Science and TechnologyNanjing 210044China Department of Mathematics University of CaliformiaLos AngelesLos AngelesCA 90095USA State Key Laboratory of New Ceramics and Fine Processing KeyLaboratory of Advanced Materials of Ministry of EducationSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Department of Engineering University of CambridgeCambridge CB21PZUK National Centre for Atmospheric Science Cambridge CB21EWUK

Everincreasing ambient ozone(O3)pollution in China has been exacerbating cardiopulmonary premature ***,the urban-rural exposure inequity has seldom been ***,we assess populationcale 03 exposure and mortality burdens between 1990 and 2019 based on integrated pollution tracking and epidemiological *** find Chinese population have been suffering from climbing 03 exposure by 4.3±2.8 ppb per decade as a result of rapid urbanization and growing prosperity of socioeconomic *** residents are broadly exposed to 9.8±4.1 ppb higher ambient O3 than the adjacent urban citizens,and thus urbaniza-tion-oriented migration compromises the exposure-associated mortality on total *** excess premature deaths attributable to longterm 03 exposure,373,500(95%uncertainty interval[U]:240,600-510,900)in 2019,is underestimated in previous studies due to ignorance of cardiovascular *** 03 pollution policy should focus more on rural population who are facing an aggravating threat of mortality risks to ameliorate environmental health injustice.

关键词： ambient urban urbanization

Interfacial Microstructure and Strengthening Mechanism of Dissimilar Laser Al/Steel Joint Via a Porous High Entropy Alloy Coating

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Zheng, Min Yang, Jin Xu, Jiayi Jiang, Jiawei Zhang, Hua Oliveira, J.P. Lv, Xueqi Xue, Jing Li, Zhuguo School of Materials Science and Engineering Shanghai University of Engineering Science Shanghai201620 China School of Advanced Manufacturing Nanchang University Nanchang330031 China Shanghai Collaborative Innovation Center of Intelligent Manufacturing Robot Technology for Large Components Shanghai201620 China CENIMAT|i3N Department of Materials Science School of Science and Technology NOVA University Lisbon Caparica Portugal Shanghai Key Laboratory of Material Laser Processing and Modification Shanghai Jiao Tong University Shanghai200240 China

A novel porous high entropy alloy (HEA) coating was prepared on the steel surface by vacuum sintering. The coating was then used as a transition layer during dissimilar laser Al/steel joining. Compared with the uncoated laser joints, the liquid alloy spread and infiltrated into porous structure, the contact angle of the weld reduced from 65.8 ° to 56.7°, and the brazed width increased from 5.1 mm to 5.9 mm, which improved the wettability and spreadability of the molten filler wire on the substrate. In the case of uncoated steel, the fusion zone/steel interfacial microstructure consisted of laminated Al7.2Fe1.8Si and Fe(Al,Si)3, while it changed to a composite-like structure containing a soft HEA skeleton and hard IMCs which was composed of Al7.2Fe1.8Si, Al3Ni, and (Al,Si)2Cr. In addition, due to the sluggish diffusion effect of HEAs, a layer of gradient nanocrystalline composed of Al7.2Fe1.8Si was generated, which significantly strengthened the dissimilar laser joints with improved both the fracture load (~26.5%) and the displacement (~101.8%). The fracture mode changed from brittle to ductile failure when the porous HEA coating was applied, with fracture propagating through the HEA skeleton. This work provides a novel solution for the strengthening of hard-to-join dissimilar combinations. © 2023, The Authors. All rights reserved.

关键词： Ductile fracture

The Stability of Sno2 And In2o3 Gas Sensors to Water Under Temperature Modulation Mode

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Zhang, Shunping Si, Renjun Li, Yan Tian, Jie Tan, Changshu Chen, Shaofeng Lei, Ming Guo, Xin State Key Laboratory of Material Processing and Die &Mould Technology Department of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China Shenzhen Power Supply Co. Ltd Shenzhen518000 China Nanomaterial and Smart Sensor Research Laboratory Department of Materials Science and Engineering Huazhong University of Science and Technology Luo-Yu Road 1037 Hubei Wuhan430074 China Laboratory of Solid State Ionics School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China

Temperature modulation technology has been extensively used in metal oxide semiconductor (MOS) gas sensors, especially based on micro-hotplate sensor structure. Temperature modulation technique not only improves the selectivity, but also enables the sensor to exhibit a highly active surface due to the effect of oxygen accumulation, thereby increasing the sensitivity. However, when the MOS sensor is in a state of high surface activity, the corresponding hydroxide may be formed with water, which affects the gas sensing performance and stability of the sensor. This paper mainly studies the stability of SnO2 and In2O3 gas sensors during storage process after temperature modulation test. The results show that SnO2 stability is good but In 2O3 stability is poor. The deactivation mechanism was discussed with infrared spectroscopy results. It indicates that after temperature modulation, the gas sensitive materials stored in atmospheric environment (20℃, 40%-60%RH) would generate hydroxides. When temperature modulation was carried out again (100-400℃), Sn(OH)4 would decompose into SnO2 , thus maintaining stability. The decomposition temperature of In(OH)3 is around 600℃. So that In(OH)3 would not decompose into In2O3 , which would lead to poor stability. © 2022, The Authors. All rights reserved.

关键词： Oxygen

Achieving Injection Molding Interlayer Strength Via Powder Assisted Hot Isostatic Pressing in Material Extrusion Polyetheretherketone

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Wu, Weidong Xin, Junzhe Hu, Bin Chen, Rong Huang, Dengfeng Huang, Zhongxin Feng, Jiangtao Du, Chun Shan, Bin State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430000 China State Key Laboratory of Intelligent Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan430000 China Wuhan CONSTANT Technology Co. Ltd. No. 818 Gaoxin Avenue Donghu New Technical Development Zone Wuhan430000 China Changzhou LAMBDA Electronic Co. Ltd. Wujin West Taihu Lake Science and Technology Industrial Zone No.56 Guoxiang Road Jiangsu Changzhou213161 China

Polyetheretherketone (PEEK), as fabricated by material extrusion, has the unique advantages of strength-to-mass ratio and biocompatibility in medical applications, yet its practical application is severely hindered by the insufficient interlayer adhesion, typically in the ranges of 5-20 MPa, far below the strength requirement of bone replacement of ~100MPa. In this study, we present a novel powder based hot isostatic pressing (PHIP) treatment to enhance the tensile strength of PEEK manufactured through the material extrusion method. By combining it with material extrusion printing parameters optimization, we successfully achieved a remarkable improvement in interlayer adhesion and tensile strength. In detail, the tensile strength in the Z-axis was measured as 102.6±0.7 MPa, 423.5% higher than those of the state-of-the-art material extrusion PEEK samples and comparable to the tensile strength of injection molding PEEK. The improvement in mechanical properties was attributed to the improved molecular diffusion and crystallinity of PEEK, as observed through scanning electron microscope (SEM) and differential scanning calorimetry (DSC) analysis. Microcomputer tomography (micro-CT) results confirmed the extensive and deep fusion between the extruded filaments and the elimination of most voids. Additionally, the PHIP method demonstrated superior shape retention stability compared to regular thermal annealing. These findings demonstrate the viability of significantly improving the mechanical properties of material extrusion PEEK via PHIP towards its bulk limit and offer a promising solution for enhancing the practical applications of PEEK manufactured through material extrusion. © 2023, The Authors. All rights reserved.

关键词： Tensile strength

Study on the Growth Mechanism and Properties of Bi2212 Thin Films on Miscut Substrates by Sol-Gel Method

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Zhao, Xingming Zhou, Huiya Qi, Yang Lu, Xiaoming Sun, Mengnan Wei, Wei Ma, Dongmei Wu, Fufa Wang, Tianlin Material Processing Engineering School of Materials Science and Engineering Liaoning University of Technology Jinzhou121001 China Department of Materials Physics and Chemistry School of Materials Science and Engineering State Key Laboratory of Rolling and Automation Northeastern University Liaoning Shenyang110819 China Cold Rolling Plant Third Branch Angang Steel Company Limited Anshan114000 China Department of Biophysics School of Intelligent Medicine China Medical University Liaoning Shenyang110122 China

A sol-gel methodology is employed to prepare Bi2212 thin films on single crystal LaAlO3 miscut substrates with nominal tilt angles of 0°, 5°, 10°, and 15°. The study focuses on examining the phase purity, crystal structure, surface morphology, microstructure, and properties of these thin films. Experimental results indicate that the growth of Bi2212 thin films on miscut substrates proceeds through the step-flow mode using the sol-gel method. Higher tilt angles lead to an increase in the conventional resistivity of Bi2212 thin films. Tilted Bi2212 thin films exhibit a typical transverse Seebeck effect when comparing the resistivity in different directions. Notably, the Seebeck coefficient difference, denoted as ΔS, reaches 12 V/K when the substrate tilt angle is set at 15°. Meanwhile, tilted Bi2212 thin films consistently exhibit outstanding Tc while demonstrating lower Jc values. These findings offer valuable insights for the development of Bi2212 HTSFs in thermoelectric and superconductive devices, serving as a reference point for achieving optimal film characteristics. © 2023, The Authors. All rights reserved.

关键词： Sol-gel process

A Colorimetric and Nir Fluorescent Probe for Ultrafast Detecting Bisulfite and Organic Amines and its Applications in Food, Imaging, and Monitoring Fish Freshness

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Zhong, Keli Li, Yang Hu, Xiaoling Li, Yangyang Tang, Lijun Sun, Xiaofei Li, Xuepeng Zhang, Jinglin Meng, Yuqiong Ma, Rui Wang, Shulin Li, Jianrong College of Chemistry and Materials Engineering College of Food Science and Technology Institute of Ocean Bohai University Food Safety Key Lab of Liaoning Province National & Local Joint Engineering Research Center of Storage Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products Jinzhou121013 China China Food Flavor and Nutrition Health Innovation Center Beijing Technology and Business University Key Laboratory of Brewing Molecular Engineering of China Light Industry Beijing100048 China State Key Laboratory of Plateau Ecology and Agriculture Qinghai University Xining810016 China

Herein, for the first time, we have successfully constructed a novel NIR emission fluorescent probe Dpyt for ultrafast detecting (within 5 s) bisulfate and organic amines based on a 1,2-dihydrocyclopenta[b]chromene-barbiturate conjugation system. Upon addition of bisulfate or organic amines, Dpyt displayed a distinct color change suggesting that Dpyt can be used to detect two analytes by the naked eye. The fluorescence quenching of Dpyt after the addition of HSO3− is caused by photoinduced electron transfer process of Dpyt-HSO3−. The fluorescence enhancement of Dpyt caused by most organic amines is due to the enhanced intramolecular charge transfer process of deprotonated Dpyt. Notably, Dpyt can be applied for detecting HSO3- in red wine and sugar samples, and for imaging of HSO3- and propylamine in living cells. And more importantly, indicator labels constructed by filter paper loaded with Dpyt can visually monitor the freshness of salmon in real-time by daylight and fluorescence dual-mode. © 2023, The Authors. All rights reserved.

关键词： Electron transport properties

Achieving Hierarchical and Multi-Scale Structure Onto Cu Substrate with Superhydrophobicity and Enhanced Anti-Corrosion Via Electrochemical Etching and Heat Treatment Mechanism

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Ye, Yuze Kang, Zhixin Wang, Fen Long, Yan Guo, Tao Chen, Dexin Kong, Jing Xu, Lin Guangdong Key Laboratory for Processing and Forming of Advanced Metallic Materials School of Mechanical & Automotive Engineering South China University of Technology 381 Wushan Guangzhou510640 China Guangdong Industry Polytechnic 152 Xingangxi Guangzhou510300 China Institute of Advanced Wear & Corrosion Resistant and Functional Materials Jinan University 601 Huangpu Avenue West Guangzhou510632 China Zhuhai Institute of Advanced Technology Chinese Academy of Sciences 2 Hagongda Zhuhai519085 China

In this work, superhydrophobic surfaces with hierarchical and multi-scale micro/nanostructure was fabricated by a simple method without damaging the substrate material. Electrochemical etching and heat treatment were taken to adhere the robust electroplated Ni with the excellent hydrophobic material of polydimethylsiloxane (PDMS) to provide a double-layer protection for the bare Cu substrate. The as-prepared superhydrophobic surface exhibited a high contact angle (CA) of 158.5° and a low slide angle (SA) of 2.4°. Electrochemical corrosion test results showed the corrosion current density of superhydrophobic surface was about 4 orders of magnitude lower than that of bare Cu in 3.5 wt.% NaCl solution, indicating that the superhydrophobic surface had superior corrosion resistance. We also discussed the corrosion resistance mechanism of superhydrophobic surface with hierarchical and multi-scale micro/nanostructure. In addition, good mechanochemical and self-cleaning properties provide effective support for the practical application of superhydrophobic surface. © 2022, The Authors. All rights reserved.

关键词： Corrosion resistance

Micro-arc plasma decomplexation of Cu-EDTA by TC4 liquid-phase discharge: underneath mechanisms

学校读者我要写书评

暂无评论

Environmental monitoring and assessment 2025年第7期197卷 748页

作者： Liu Yuchang Wang Sheng Liu Haoming Cheng Xin Qin Huiyi Wang Haoxv Zhang Yali School of Materials Science and Engineering Lanzhou University of Technology Lanzhou 730050 China. Jiangyou Changcheng Special Steel Co. Ltd. of Pangang Group Jiangyou 621700 China. School of Materials Science and Engineering Lanzhou University of Technology Lanzhou 730050 China. shengwang@***. State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals Lanzhou University of Technology Lanzhou 730050 China. shengwang@***. State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals Lanzhou University of Technology Lanzhou 730050 China.

The paper discusses a method to treat wastewater (Cu-EDTA, copper ethylenediamine tetra acetic acid) using micro-arc plasma by combining micro-arc oxidation technology and advanced oxidation technology from the fields of material surface treatment and environmental engineering. The aim is to change copper ions from a complex state to a free state. The decomplexation rate was up to 73.82%, and the mineralization rate was up to 32.7% for the samples after 100 min of treatment with micro-arc plasma. Cu-EDTA decomplexation is divided into the decomposition of EDTA and free copper ion reactions. The active substance reacts with Cu-EDTA to generate intermediates, leading to the mineralization of EDTA through continuous decomposition and synthesis. Meanwhile, copper ions complete the decomplexation and react with other anions in the solution and on the anode surface. This study not only provides a new wastewater treatment technology but also improves the theoretical study of micro-arc plasma on organic matter.

关键词： Cu-EDTA Electric discharge plasma Heavy metal complex Industrial wastewater TC4 Titanium alloy