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Self-assembly tungsten selenide hybrid ternary MOF derived magnetic alloys via multi-polarization to boost microwave absorption

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Nano Research 2024年第3期17卷 1625-1635页

作者： Tianbao Zhao tingting zheng Di Lan Yan Zhang zhengshuo Sun Chao Wang Zirui Jia Guanglei Wu Institute of Materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002China College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

Confronted with severe electromagnetic wave pollution,the development of high-performance electromagnetic wave shielding or absorbing materials is an effective way to deal with ***,double transition metal alloys and transition metal dichalcogenides have attracted extensive attention in electromagnetic wave absorption,but few reports have studied the effects of these two materials on electromagnetic wave absorption at the same *** this work,cobalt-based alloy with magnetic loss mechanism was selected for composition *** ternary metal-organic framework was prepared by the one-step method,and then CoCu/C was prepared by high temperature ***,in the hydrothermal process,ultra-thin tungsten selenide nanosheets were coated on the surface of magnetic component,and the final polyhedral WSe_(2)/CoCu/C composites with multiple heterogeneous interfaces were *** synergistic effect of dielectric and magnetic components optimizes impedance matching and allows more electromagnetic waves to enter the ***,through the conduction loss of high conductivity graphitized carbon,interfacial polarization,and dipole polarization of heterogeneous interfaces between the components,the magnetic loss provided by CoCu alloy can work together to maximize the attenuation ability of electromagnetic ***,the minimum reflection loss(RLmin)value of the composite reaches-53.43 dB when the matched thickness is 2.1 mm,while the maximum effective absorption bandwidth(EABmax)reaches 6.0 GHz at a thin thickness of 1.8 *** work provides some support and reference for the design of novel electromagnetic wave absorbing materials via the dielectric/magnetic loss synergistic mechanism.

关键词： metal-organic framework dielectric/magnetic loss transition metal dichalcogenide electromagnetic wave absorption

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One Case of Primary Thrombocythemia with Concealed Hypokalemia Complicated by Acute Myocardial Infarction

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World Journal of Cardiovascular Diseases 2024年第1期14卷 16-26页

作者： Huiling Liang tingting zheng Yuanhong Zhuo Department of Cardiology The First Affiliated Hospital of Sun Yat-sen University Guangzhou China Department of Extracorporeal Circulation The First Affiliated Hospital of Sun Yat-sen University Guangzhou China

Medical history summary: Male, 47 years old, was admitted to the hospital due to “dizziness accompanied by chest tightness and pain for more than 8 days”. One week ago, the patient experienced chest tightness, chest pain accompanied by profuse sweating for 3 hours and underwent emergency percutaneous coronary intervention (PCI) at a local hospital. The procedure revealed left main stem occlusion with subsequent left main stem to left anterior descending artery percutaneous transluminal coronary angioplasty (PTCA). After the procedure, the patient experienced hemodynamic instability, recurrent ventricular fibrillation, and critical condition, thus transferred to our hospital for further treatment. Symptoms and signs: The patient is in a comatose state, unresponsive to stimuli, with bilateral dilated pupils measuring 2.0 mm, exhibiting reduced sensitivity to light reflex, and recurrent fever. Coarse breath sounds can be heard in both lungs, with audible moist rales. Irregular breathing pattern is observed, and heart sounds vary in intensity. No pathological murmurs are auscultated in any valve auscultation area. Diagnostic methods: Coronary angiography results at the local hospital showed complete occlusion of the left main stem, and left main stem to left anterior descending artery percutaneous transluminal coronary angioplasty (PTCA) was performed. However, the distal guidewire did not pass through. After admission, blood tests showed a Troponin T level of 1.44 ng/ml and a Myoglobin level of 312 ng/ml. The platelet count was 1390 × 109/L. Von Willebrand factor (vWF) activity was measured at 201.9%. Bone marrow aspiration biopsy showed active bone marrow proliferation and platelet clustering. The peripheral blood smear also showed platelet clustering. JAK-2 gene testing was positive, confirming the diagnosis of primary thrombocytosis. Treatment methods: The patient is assisted with mechanical ventilation and intra-aortic balloon counterpulsation to improve

关键词： Primary Thrombocythemia Acute ST-Segment Elevation Myocardial Infarction Concealed Hypokalemia Thrombosis Bleeding

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Laccase/caffeic acid-catalyzed crosslinking coupled with galactomannan alters the conformational structure of ovalbumin and alleviates Th2-mediated allergic asthma

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Food Science and Human Wellness 2024年第4期13卷 1962-1973页

作者： Ishfaq Ahmed Suidong Ouyang Shengquan Wu Haochang Song Miaoyuan Zhang Renxing Luo Peishan Lu Jiaqi Deng tingting zheng Yanyan Wang Xinguang Liu Gonghua Huang Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics The First Dongguan Affiliated HospitalGuangdong Medical UniversityDongguan 523808China Haide College Ocean University of ChinaLaoshan CampusQingdao 266100China School of Medical Technology Guangdong Medical UniversityDongguan 523808China

Ovalbumin(OVA)is the major allergenic protein that can induce T helper 2(Th2)-allergic reactions,for which current treatment options are *** this study,we developed a polymerized hypoallergenic OVA product via laccase/caffeic acid(Lac/CA)-catalyzed crosslinking in conjunction with galactomannan(Man).The formation of high molecular weight crosslinked polymers and the Ig G-binding were analyzed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis(SDS-PAGE)and Western *** study indicated that Lac/CA-catalyzed crosslinking plus Man conjugation substantially altered secondary and tertiary structures of OVA along with the variation in surface *** digestion stability assay indicated that crosslinked OVA exhibited less resistance in simulated gastric fluid(SGF)and simulated intestinal fluid(SIF).Mouse model study indicated that Lac-Man/OVA ameliorated eosinophilic airway inflammatory response and efficiently downregulated the expression of Th2-related cytokines(interleukin(IL)-4,IL-5,and IL-13),and upregulated IFN-γand IL-10 *** of bone marrow-derived dendritic cells with Lac-Man/OVA suppressed the expression of phenotypic maturation markers(CD80 and CD86)and MHC class II molecules,and suppressed the expression levels of proinflammatory *** knowledge obtained in the present study offers an effective way to acquire a hypoallergenic OVA product that can have a therapeutic effect in alleviating OVA-induced allergic asthma.

关键词： Ovalbumin Laccase Galactomannan Conformational structure Asthma

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Carbon materials for enhanced photothermal conversion:Preparation and applications on steam generation

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Materials Reports(Energy) 2024年第2期4卷 34-44页

作者： Jiayi Zhu Liu Huang Feng Bao Guanli Chen Kangjin Song Zheling Wang Hong Xia Jinping Gao Yibing Song Caizhen Zhu Fushen Lu tingting zheng Muwei Ji College of Chemistry and Chemical Engineering Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong ProvinceShantou UniversityShantou515063China School of Chemistry and Chemical Engineering Guangdong Pharmaceutical UniversityZhongshan528458China Institute of Low-Dimensional Materials Genome Initiative College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen518060China Department of Pharmacy Shandong University of Traditional Chinese MedicineJinan250355China

Photothermal conversion attracted lots of attention in the past years and sorts of materials were explored to enhance photothermal *** the past years,solar-driven desalination by photothermal conversion was proposed to release the shortage of fresh water and then it was considered much more important to prepare photothermal materials on large scales with high performance and low *** this review,we summarized the works on carbon-based photothermal materials in the past years,including the preparation as well as their application in steam *** these works,we give an outlook on the difficulties and chances of how to design and prepare carbon-based photothermal materials.

关键词： Photothermal conversion Carbon Composites Solar energy Steam generation

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Advancements in life-on-a-chip: The impact of “Beyond Limits Manufacturing” technology

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Chinese Chemical Letters 2024年第5期35卷 13-16页

作者： Weiwei He Hongbo Zhang Xudong Lin Lili Zhu tingting zheng Hao Pei Yang Tian Min Zhang Guoyue Shi Lei Wu Jianlong Zhao Gulinuer Wumaier Shengqing Li Yufang Xu Honglin Li Xuhong Qian Shanghai Key Laboratory of New Drug Design School of PharmacyEast China University of Science and TechnologyShanghai 200237China School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument School of Biomedical EngineeringShenzhen Campus of Sun Yat-sen UniversityShenzhen 518000China Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of ChemistrySchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200241China Shanghai Institute of Microsystem and Information Technology Chinese Academy of SciencesShanghai 200050China Department of Pulmonary and Critical Care Medicine Huashan HospitalFudan UniversityShanghai 200040China Innovation Center for AI and Drug Discovery East China Normal UniversityShanghai 200062China Lingang Laboratory Shanghai 200031China

This review explores the concept of life-on-a-chip,which involves the creation of miniaturized biological systems,such as organs,tissues,and model organisms,on microscale platforms called microfluidic *** chips consist of intricately etched channels,wells,and chambers that enable precise control and observation of fluids,cells,and biochemical reactions,facilitating the simulation of various aspects of human or animal physiology and the study of responses to different stimuli,drugs,or disease *** review highlights the application of a novel technology,“Beyond Limit Manufacturing”(BLM),in the development of sophisticated three-dimensional cell models and model organism ***-on-a-chip and organ-on-a-chip(OoC)are among the thriving developments in the field of microfluidics,allowing for the reconstruction of living microenvironments and implementation of multiple *** review discusses the latest advancements in life-on-a-chip technology using BLM and outlines potential future research directions,emphasizing the significant role of these chips in studying complex biological processes in a controlled and scalable manner.

关键词： Beyond Limit Manufacturing Model-organism-on-a-chip Organ-on-a-chip

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1700 V精细沟槽栅IGBT器件设计

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半导体技术 2024年第4期49卷 310-315,329页

作者：郑婷婷南京南瑞半导体有限公司南京211100

为了改善绝缘栅双极型晶体管(IGBT)器件关断损耗和导通压降之间的折中关系,同时降低器件制造成本,基于1 700 V电压平台设计了一种采用精细沟槽栅结构的IGBT。采用TCAD软件进行仿真,研究衬底电阻率、衬底厚度、沟槽栅深度、沟槽栅宽度、... 详细信息

为了改善绝缘栅双极型晶体管(IGBT)器件关断损耗和导通压降之间的折中关系,同时降低器件制造成本,基于1 700 V电压平台设计了一种采用精细沟槽栅结构的IGBT。采用TCAD软件进行仿真,研究衬底电阻率、衬底厚度、沟槽栅深度、沟槽栅宽度、载流子存储层注入剂量、沟槽栅元胞结构等因素对精细沟槽栅IGBT器件性能参数的影响,确定了最优工艺参数,并对1 700 V精细沟槽栅IGBT芯片进行流片和封装。测试结果显示,相比普通沟槽栅IGBT模块,1 700 V精细沟槽栅IGBT模块在芯片面积减小34.2%的情况下,关断损耗降低了8.6%,导通压降仅升高5.5%,器件性价比得到了优化。

关键词：精细沟槽栅结构绝缘栅双极型晶体管(IGBT) TCAD仿真元胞结构器件性价比

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岩溶地下水系统冷泉和热泉的形成机制:以趵突泉群为例

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地球科学 2024年第8期49卷 2862-2878页

作者：康凤新隋海波郑婷婷徐秋晓山东科技大学地球科学与工程学院山东青岛266590 山东省地质矿产勘查开发局八O一水文地质工程地质大队山东济南250014 山东省地下水环境保护与修复工程技术研究中心山东济南250013 济南大学水利与环境学院山东济南250022 山东省鲁南地质工程勘察院山东济宁272100

岩溶地下水和地热水分别是中国北方重要的供水水源和供暖热源,但二者水力联系尚缺乏系统研究;为实现保泉、供水和地热清洁能源开发的三赢,通过含水层/热储层空间分布、同位素测年、水文地球化学场、水动力场、温度场特征及规律分析等方... 详细信息

岩溶地下水和地热水分别是中国北方重要的供水水源和供暖热源,但二者水力联系尚缺乏系统研究;为实现保泉、供水和地热清洁能源开发的三赢,通过含水层/热储层空间分布、同位素测年、水文地球化学场、水动力场、温度场特征及规律分析等方法,揭示了趵突泉泉域岩溶地下水流系统从浅、中循环子系统至深循环子系统,即岩溶地下水至冷泉和热泉的演变过程、驱动机制与响应机理.在地下水位高程差引起的重力势能差驱动下,岩溶地下水沿济南含水层系统从上游浅循环—开放式地下水动力系统,向中游中循环—半开放式地下水动力系统径流,径流途中在济南市区遇不透水的辉长岩体或石炭纪二叠纪砂岩页岩地层阻截,大部分地下水沿垂向强裂隙岩溶发育通道上涌、穿透第四纪砾岩或辉长岩体裂隙发育带喷出地表形成17~18℃的承压上升冷泉.一小部分地下水从深部穿过或从侧面绕过辉长岩体,沿裂隙岩溶通道继续向下游深循环运移,形成弱开放地热水动力系统;高大地热流传导聚热、深大断裂带/侵入岩体—灰岩接触带带状对流聚热、凸起区高热导率分流聚热、盖层低热导率保温聚热、地下水深循环运移传导—对流聚热等五元聚热驱动14~18℃的常温地下水演变为33~95℃的承压热泉(自流地热水).

关键词：冷泉热泉聚热演变过程驱动机制趵突泉水文地质

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针对性护理在更年期异常子宫出血患者中的应用效果以及对睡眠质量的影响

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中国医药指南 2024年第22期22卷 132-134页

作者：郑婷婷泉州市永春县石鼓卫生院妇产科泉州362600

目的分析更年期异常子宫出血针对性护理的应用效果。方法以2021年6月至2023年6月石鼓卫生院收治的40例更年期异常子宫出血患者为研究对象,根据治疗期间的护理模式分为对照组(20例,常规护理)和观察组(20例,针对性护理),对比分析两组患者... 详细信息

目的分析更年期异常子宫出血针对性护理的应用效果。方法以2021年6月至2023年6月石鼓卫生院收治的40例更年期异常子宫出血患者为研究对象,根据治疗期间的护理模式分为对照组(20例,常规护理)和观察组(20例,针对性护理),对比分析两组患者的临床指标及护理前后的负面情绪、睡眠质量、生活质量、更年期自护能力以及对护理服务的满意度。结果观察组患者控制出血时间、完全止血时间及总住院时间均低于对照组(P<0.05)。干预后观察组焦虑自评量表(SAS)、抑郁自评量表(SDS)、匹兹堡睡眠质量指数(PSQI)、更年期生活质量评分量表(MRS)评分均较干预前降低,自护能力评分较干预前却有显著的提高(均P<0.05);且观察组SAS、SDS、PSQI、MRS评分均低于对照组,自护能力评分高于对照组(均P<0.05)。护理满意度观察组也高于对照组(P<0.05)。结论对更年期异常子宫出血患者采取针对性护理,可有效保障治疗效果,促进疾病症状与睡眠质量改善,并提升患者更年期自护能力,减轻心理负担,且取得较高护理满意度评价。

关键词：更年期异常子宫出血针对性护理睡眠质量心理负担护理满意度

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退行性脊柱畸形患者的自我管理现状及影响因素研究

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中国全科医学 2024年第15期27卷 1867-1872页

作者：张曌郑婷婷王钰姝罗飞刘蕾陆军军医大学第一附属医院医院办公室重庆市400000 中国人民解放军西部战区总医院骨科四川省成都市610000 陆军军医大学第一附属医院骨科重庆市400000 陆军军医大学第一附属医院急诊医学科重庆市400000

背景近年来,退行性脊柱畸形(DSD)的患病率逐年上升,从疾病发生到需手术干预之前,患者将与疾病长期共存,期间自我管理对DSD的发展及转归至关重要。然而,DSD患者的自我管理现状及影响因素尚不明确,无法针对性地制订有效的干预措施。目的研... 详细信息

背景近年来,退行性脊柱畸形(DSD)的患病率逐年上升,从疾病发生到需手术干预之前,患者将与疾病长期共存,期间自我管理对DSD的发展及转归至关重要。然而,DSD患者的自我管理现状及影响因素尚不明确,无法针对性地制订有效的干预措施。目的研究DSD患者的自我管理现状并分析其影响因素,为制订针对性的干预方案提供临床参考。方法采用便利抽样法对2020年6月—2022年12月于陆军军医大学第一附属医院骨科就诊的200例DSD患者进行问卷调查,收集患者的人口统计学资料、视觉模拟评分、Oswestry功能障碍指数问卷(ODI)评分、医疗社会支持量表(MOS-SSS)评分以及慢病自我管理行为量表评分。构建多元线性回归模型分析患者慢病自我管理行为量表评分的影响因素。结果共回收有效问卷191份(95.5%),患者的平均年龄为(62.6±11.6)岁,其中脊柱侧弯144例(75.4%),后凸37例(19.4%),侧后凸10例(5.2%)。慢病自我管理行为量表总分为(22.94±11.97)分,各维度标准化得分由高到低依次为认知症状管理(26.27±15.83)分、医患交流(23.53±16.27)分和运动锻炼(18.42±11.00)分。相关性分析结果显示,年龄、BMI、家庭人均月收入、受教育程度、吸烟史、ODI评分、MOSSSS评分与慢病自我管理行为量表各维度评分和总分显著相关(P<0.05)。多元线性回归分析模型结果显示,MOSSSS评分、受教育程度、家庭人均月收入和骨密度是DSD患者慢病自我管理行为量表评分的影响因素(P<0.05)。结论DSD患者的自我管理行为水平较低,MOS-SSS评分、受教育程度、经济水平和骨密度是DSD患者自我管理的影响因素,医护人员在临床实践中应从加强教育、提升社会支持等方面增强患者的自我管理行为,帮助患者有效管理疾病。

关键词：脊柱疾病退行性脊柱畸形自我管理影响因素分析多元线性回归

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基于科学推理与论证的初中化学教学实践——以“酸和碱的中和反应”为例

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化学教学 2024年第2期 53-57页

作者：徐立堂张贤金郑婷婷宁德屏南县教师进修学校福建宁德352300 福建教育学院化学教育研究所福建福州350025 宁德东侨经济技术开发区中学福建宁德352101

以人教版“酸和碱的中和反应”为例,从“依据已有事实,初步论证酸与碱的反应→利用建构模型,论证盐酸与氢氧化钠的反应→辨识微粒变化,推理酸与碱的反应”三个环节具体阐述如何引导学生从素材收集、实验事实、宏观微观等视角对酸碱中和... 详细信息

以人教版“酸和碱的中和反应”为例,从“依据已有事实,初步论证酸与碱的反应→利用建构模型,论证盐酸与氢氧化钠的反应→辨识微粒变化,推理酸与碱的反应”三个环节具体阐述如何引导学生从素材收集、实验事实、宏观微观等视角对酸碱中和反应进行推理论证。围绕酸和碱之间能否发生反应进行分析,发展学生的学科思维,通过氢氧化钠与稀盐酸反应的个例论证,推理酸和碱之间发生反应的普遍规律,帮助学生建构化学观念,培育学生的核心素养。

关键词：初中化学科学论证证据推理模型建构教学案例

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