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Manipulating the Phase Transition Behavior of Dual Temperature-Responsive Block Copolymers by Adjusting Composition and Sequence

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Chinese Journal of Polymer Science 2024年第2期42卷 176-187,I0006页

作者： Zhi Zou Xiang Xu Hai-Tao Zhao Jian-Nan cheng Wei-Wei He Li-Fen Zhang zhen-Ping cheng Suzhou key Laboratory of Macromolecular Design and Precision Synthesis Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationState and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou215123China State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of JiangsuSoochow UniversitySuzhou215123China

Temperature-responsive polymers have garnered significant attention due to their ability to respond to external *** this work,dual temperature-responsive block copolymers are synthesized via reversible addition-fragmentation chain transfer polymerization(RAFT)polymerization utilizing zwitterionic monomer methacryloyl ethyl sulfobetaine(SBMA) and N-isopropyl acrylamide(NIPAAm) as *** thermal responsive behaviors can be easily modulated by incorporating additional hydrophobic monomer benzyl acrylate(BN) or hydrophilic monomer acrylic acid(AA),adjusting concentration or pH,or varying the degree of polymerization of the block chain *** cloud points of the copolymers are determined by UV-Vis spectrophotometry,and these copolymers exhibit both controlled upper and lower critical solu bility temperatures(LCST and UCST) in aqueous *** study analyzes and summarizes the influencing factors of dual temperature responsive block copolymers by exploring the effects of various conditions on the phase transition temperature of temperature-sensitive polymers to explore the relationship between their properties and environment and structure to make them more selective in terms of temperature application range and regulation *** is very interesting that the introduction of poly-acrylic acid(PAA) segments in the middle of di-block copolymer PSBMA_(55)-b-PNIPAAm_(80) to form PSBMA_(55)-b-PAA_(x)-b-PNIPAAm_(80) results in a reversal of temperature-responsive behaviors from 'U'(LCST UCST) type,while the copolymer PSBMA_(55)-b-P(NIPAAm_(80)-co-AA_(x)) *** work provides a clue for tuning the phase transition behavior of polymers for manufacture of extreme smart materials.

关键词： Temperature responsive polymers High critical solubility temperature(UCST) Low critical solubility temperature(LCST) Block copolymers

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Core competencies and perceived training needs of nurses in the background of Internet plus nursing service:a qualitative descriptive study

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Frontiers of Nursing 2024年第2期11卷 181-190页

作者： Qiang-Hui-Zi Zhang Wei-Wei Liu zhen-zhen cheng School of Nursing Capital Medical UniversityBeijing 100069China Department of Orthopedics Peking University Shougang HospitalBeijing 100043China

Background:The Internet plus nursing service program is being piloted in China,which has become a new home nursing service model led by *** enable safe and effective homecare service delivery,nurses working in the program need a high level of ***,the content of these core competencies and the training needs of nurses for Internet plus nursing services are still ***:To describe nurses’perceptions of core competencies and training needs to work in the Internet plus nursing service program,thereby providing a reference for the development of training ***:A qualitative descriptive study using semi-structured interviews was conducted on 15 nurses with experience of working in the Internet plus nursing service *** were audio-recorded and transcribed verbatim,and the data were analyzed using thematic ***:Core competencies involved comprehensive assessment competence,direct care practice competence,health education and consulting competence,risk estimation and response competence,and communication *** needs involved complex operational items,knowledge of chronic disease management,professional communication,risk identification and response,nursing standards,norms,and procedures,and utilization of information ***:The training system may be developed based on nurses’core competencies and their training needs to promote professional development of the Internet plus nursing service.

关键词： core competence Internet plus nursing service nursing qualitative study training needs

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MOF-mediated synthesis of novel PtFeCoNiMn high-entropy nanoalloy as bifunctional oxygen electrocatalysts for zinc-air battery

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Nano Research 2024年第6期17卷 5288-5297页

作者： Mingkuan Xie Xin Xiao Duojie Wu cheng zhen Chunsheng Wu Wenjuan Wang Hao Nian Fayan Li Meng Danny Gu Qiang Xu Shenzhen Key Laboratory of Micro/Nano-Porous Functional Materials(SKLPM) Shenzhen 518055China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China SUSTech-Kyoto University Advanced Energy Materials Joint Innovation Laboratory(SKAEM-JIL) Shenzhen 518055China Key University Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development of Guangdong Southern University of Science and TechnologyShenzhen 518055China Eastern Institute for Advanced Study Eastern Institute of TechnologyNingbo 315200China

High-entropy alloy(HEA)-based materials are expected to be promising oxygen electrocatalysts due to their exceptional *** electronic structure regulation of HEAs plays a pivotal role in enhancing their elctrocatalytic ***,PtFeCoNiMn nanoparticles(NPs)with subtle lattice distortions are constructed on metal-organic framework-derived nitrogen-doped carbon by an ultra-rapid Joule heating *** to the modulated electronic structure and the inherent cocktail effect of HEAs,the as-synthesized PtFeCoNiMn/NC exhibits superior bifunctional electrocatalytic performance with a positive half-wave potential of 0.863 V *** hydrogen electrode(RHE)for oxygen reduction reaction and a low overpotential of 357 mV at 10 mA·cm^(-2)for oxygen evolution *** assembled quasi-solid-state zinc-air battery using PtFeCoNiMn/NC as air electrode shows a high peak power density of 192.16 mW·cm^(-2),low charge−discharge voltage gap,and excellent durability over 500 cycles at 5 mA·cm^(-2).This work demonstrates an effective route for rational design of bifunctional nanostructured HEA electrocatalysts with favorable electronic structures,and opens up a fascinating directions for energy storage and conversion,and beyond.

关键词： oxygen reduction reaction oxygen evolution reaction high-entropy nano-alloy zinc-air battery

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Alteration of the health effects of bioaerosols by chemical modification in the atmosphere:A review

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Fundamental Research 2024年第3期4卷 463-470页

作者： Ailin Li Xinghua Qiu Xing Jiang Xiaodi Shi Jinming Liu zhen cheng Qianqian Chai Tong Zhu State Key Joint Laboratory for Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

Bioaerosols are a subset of important airborne particulates that present a substantial human health hazard due to their allergenicity and *** reactions in atmospheric processes can significantly influence the health hazard presented by bioaerosols;however,few studies have summarized such alterations to bioaerosols and the mechanisms *** this paper,we systematically review the chemical modifications of bioaerosols and the impact on their health effects,mainly focusing on the exacerbation of allergic diseases such as asthma,rhinitis,and ***,nitration,and oligomerization induced by hydroxyl radicals,ozone,and nitrogen dioxide are the major chemical modifications affecting bioaerosols,all of which can aggravate allergenicity mainly through immunoglobulin E *** processes can even interact with climate change including the greenhouse effect,suggesting the importance of bioaerosols in the future implementation of carbon neutralization *** summary,the chemical modification of bioaerosols and the subsequent impact on health hazards indicate that the combined management of both chemical and biological components is required to mitigate the health hazards of particulate air pollution.

关键词： Bioaerosols Allergenicity Chemical modification Airpollution Climate change

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A prospective microbiome analysis of the impact of physical exercise and blueberry supplementation on the gut microbiome of obesity-induced hypertensive in college students

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Food Science and Human Wellness 2024年

作者： zhen cheng Rendong Li Tie Ma Aihua Xu Yuanyuan Bian Bin Li College of Food Science Shenyang Agricultural University Physical Education Department Shenyang University of Chemical Technology Shenyang Economic and Technological Development Zone The College of Kinesiology Shenyang Sport University Department of Rehabilitation Medicine The First Hospital of China Medical University

The prevalence of high blood pressure is on the rise among younger individuals， and recent findings have linked exercise to changes in the diversity and configuration of gut microbiota. However， specific modifications to one's diet， such as incorporating blueberries while engaging in physical activity， can also influence this association. To explore the effects of exercise and blueberry consumption on gut bacteria， we conducted an eight-week study involving healthy and hypertensive college students. Our microbiome analysis revealed slight shifts in gut bacteria composition in response to increased physical activity， with significant changes in the diversity of the g＿[Eubacterium]＿eligens＿group observed in hypertensive college students who regularly consumed blueberries. Although exercise and blueberry supplementation had a negligible impact on the gut microbiota diversity of healthy college students， it significantly boosted the production of butyric acid bacteria in hypertensive young adults. These results suggest that the changes in gut bacteria variety and abundance brought about by blueberries may be tied to alterations in the body composition of patients with hypertension. This study aims to reveal the impact of blueberry on the hypertensive students from a unique perspective， suggesting the impact of taking blueberry while taking exercises.

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Recent advances in Ir/Ru-based perovskite electrocatalysts for oxygen evolution reaction

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Rare Metals 2024年第7期43卷 2891-2912页

作者： Zhi-Qi Jiang cheng-zhen Fan Jun-Yu Pan Li Shao Hao Chen Erum Pervaiz Yan Dong Tong-Zhou Wang Xue-Rong zheng Ji-Hong Li Yi-Da Deng School of Materials Science and Engineering Hainan University Department of Chemical Engineering School of Chemical and Materials Engineering (SCME)National University of Sciences & Technology (NUST) Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University

Oxygen evolution reaction(OER) is a kinetically harsh four-electron anode reaction that requires a large overpotential to provide current and is of great importance in renewable electrochemical ***/Rubased perovskite oxides hold great significance for application as OER electrocatalysts,due to that their multimetal-oxide forms can reduce the use of noble metals,and their compositional tunability can modulate the electronic structure and optimize OER ***,high operating potentials and corrosive environments pose a serious challenge to the development of durable Ir-based and Ru-based perovskite *** efforts have been dedicated to improving the Ir/Ru-based perovskite activity to enhance the efficiency;however,progress in improving the durability of Ir/Ru-based perovskite electrocatalysts has been rather *** this review,the recent research progress of Ir/Ru-based perovskites is reviewed from the perspective of heteroatom doping,structural modulation,and formation of *** dissolution mechanism studies of Ir/Ru and experimental attempts to improve the durability of Ir/Ru-based perovskite electrocatalysts are *** and outlooks for further developing Ru-and Irbased perovskite oxygen electrocatalysts are also presented.

关键词： Oxygen evolution reaction Ir/Ru-based perovskites Stability Electrocatalysts

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Electrooxidative trifunctionalization of alkenes with N-chlorosuccinimide and ArSSAr/ArSH to α,β-dichloride arylsulfoxides

Green Synthesis and Catalysis

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Green Synthesis and Catalysis 2024年第2期5卷 131-135页

作者： Guohui Qin Renjie Wang zhen cheng Yonghong Zhang Bin Wang Yu Xia Weiwei Jin Chenjiang Liu Urumqi Key Laboratory of Green Catalysis and Synthesis Technology Key Laboratory of Oil and Gas Fine ChemicalsMinistry of Education&Xinjiang Uygur Autonomous RegionState Key Laboratory of Chemistry and Utilization of Carbon Based Energy ResourcesCollege of ChemistryXinjiang UniversityUrumqi 830017China

An unprecedented electrochemical oxidative trifunctionalization of olefins with diaryl disulfides/aryl thiols and N-chlorosuccinimide in an aqueous system is *** C-Cl bonds,one C-S bond,and one S=O bond are produced simultaneously in one step from simple and commercially available starting materials with clean *** tandem methodology features as mild reaction conditions,transition metal and additional oxidant free,broad substrate scope,good functional group compatibility,and gram scale preparation.

关键词： Electrooxidation Alkenes functionalization Vicinal dichlorination Sulfoxidation Tandem reaction

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单元整体视角下小学科学单元作业的优化设计

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教学与管理 2024年第11期 65-68页

作者：周振程江苏省连云港市东海县白塔埠中心小学

科学合理地安排作业已成为义务教育阶段教育教学改革的焦点之一。然而,当前的小学科学作业形式呆板、情境单一,缺乏层次性。整体视角下的单元作业设计应基于教材编排体系,设置单元作业目标;结合具体学情,明确单元作业内容;着眼学生思维... 详细信息

科学合理地安排作业已成为义务教育阶段教育教学改革的焦点之一。然而,当前的小学科学作业形式呆板、情境单一,缺乏层次性。整体视角下的单元作业设计应基于教材编排体系,设置单元作业目标;结合具体学情,明确单元作业内容;着眼学生思维培养,设置多样的作业形式;借助多种评价方式,保证单元作业目标的达成。

关键词：单元整体小学科学单元作业作业目标作业内容作业类型作业评价

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超临界二氧化碳系统用箔片气体动压轴承静特性研究

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振动工程学报 2024年第5期37卷 875-884页

作者：朱鹏程管玉坤门日秀程振宇冯凯湖南大学汽车车身先进设计制造国家重点实验室湖南长沙410082 中国北方发动机研究所柴油机增压技术重点实验室天津300400

超临界二氧化碳动力循环系统对实现节能减排的目标有着十分积极的作用。针对一种箔片气体动压轴承结构建立了计算模型,并通过拟合非理想状态气体超临界二氧化碳的密度与压力之间的关系,基于传热学模型和气体润滑能量方程分析了轴承气膜... 详细信息

超临界二氧化碳动力循环系统对实现节能减排的目标有着十分积极的作用。针对一种箔片气体动压轴承结构建立了计算模型,并通过拟合非理想状态气体超临界二氧化碳的密度与压力之间的关系,基于传热学模型和气体润滑能量方程分析了轴承气膜温升,结合实际运行过程中出现的湍流效应修正润滑气体雷诺方程、耦合力学分析模型和能量方程,分析S-CO_(2)介质箔片气体动压轴承的静特性,并与空气作为介质进行对比分析不同系统参数和湍流参数对轴承特性的影响规律。结果表明:相较于空气而言,使用超临界二氧化碳作为润滑介质的箔片气体动压轴承具有较高的承载力,而且在一定范围内随着轴承直径和宽度的增加、偏心率的上升、轴承间隙的减小、转速的提高等,轴承承载力均可以增大;对于湍流影响因素来说,在一定范围内随着局部雷诺数和湍流系数的增加、气体动力黏度和密度的提高、高温环境下环境温度的降低等,轴承承载力将会增大。

关键词：箔片气体动压轴承雷诺方程超临界二氧化碳承载力

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老年人口腔衰弱的研究现状及进展

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中华全科医师杂志 2024年第3期23卷 309-313页

作者：方森程臻王蕾山西医科大学第三医院综合医疗科(山西白求恩医院、山西医学科学院、同济山西医院) 太原030032

衰弱是衰老的关键中间状态,与老年人跌倒、残疾和死亡等不良后果的发生密切相关,严重损害老年人的生命质量。近年来有学者提出口腔衰弱也是衰弱的一种类型并可作为衰弱的预测因素和组成部分。文章对口腔衰弱的定义、流行病学、评估工具... 详细信息

衰弱是衰老的关键中间状态,与老年人跌倒、残疾和死亡等不良后果的发生密切相关,严重损害老年人的生命质量。近年来有学者提出口腔衰弱也是衰弱的一种类型并可作为衰弱的预测因素和组成部分。文章对口腔衰弱的定义、流行病学、评估工具、与衰弱的可能机制联系及干预措施进行总结,旨在提高对口腔衰弱的重视程度,为未来开展口腔衰弱领域的研究提供思路。

关键词：老年人衰弱口腔表现口腔保健

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