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The Influence of Base Oil and Thixotropy on Magnetorheological Property of MRF

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The Influence of Base Oil and Thixotropy on Magnetorheologic...

Shadow thermodynamics of AdS black hole with the nonlinear electrodynamics term

2012 China Functional Materials Technology and Industry Forum

作者： Jian-jian Yang Hua Yan Zhi-de Hu Shi-xiang Xu Logistic engineering University

Adopting carbonyl iron powder and silicone/mineral oil as suspend phase and dispersed phase separately,and silica,kaolin as lubricant additives,magnetorheological(MR)fluid was prepared by ball *** apparent viscosity of base oil and shear stress were measured on a modified rotational *** experimental results demonstrated that an appropriate viscosity of base oil contributed to the rheology of *** a small amount of thixotropy into MRF had little influence on zero-field viscosity,which facilitated the application of MRF to maintain adequate *** low shear rate conditions,the shear stress was improved by adding thixotropy to some extent,especially in the mineral oil-based magnetorheological fluid,in which the role of silica was superior to kaolin.

关键词： Magnetorheological effect Base oil thixotropy Shear stress Shear strain rate

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Chinese Physics B 2023年第8期32卷 201-208页

作者：郑何斌牟平辉陈芸仙李国平 School of Physics and Astronomy China West Normal UniversityNanchong 637000China

We creatively employ the shadow radius to study the thermodynamics of a charged Ad S black hole with a nonlinear electrodynamics(NLED)***,the connection between the shadow radius and event horizon is constructed with the aid of the geodesic *** turns out that the black hole shadow radius shows a positive correlation as a function of the event horizon *** in the shadow context,we find that the black hole temperature and heat capacity can be presented by the shadow *** analysis shows that the shadow radius can work similarly to the event horizon in revealing black hole phase transition *** this sense,we construct the thermal profile of the charged Ad S black hole with inclusion of the NLED *** the P

关键词： AdS black hole the nonlinear electrodynamics shadow thermodynamics

In-plane spin excitation of skyrmion bags

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Chinese Physics B 2023年第11期32卷 585-590页

作者：李爽李可欣刘照华朱起源赵晨博张虎石兴强王江龙王瑞宁连如乾巩朋来金晨东 Key Laboratory of Optic-Electronic Information and Materials of Hebei province Research Center for Computational PhysicsCollege of Physics Science and TechnologyHebei UniversityBaoding 071002China College of Mathematics and Physics Chongqing University of Science and TechnologyChongqing 401331China Department of Materials science and Engineering Lanzhou University of TechnologyLanzhou 730050China

Skyrmion bags are spin structures with arbitrary topological charges, each of which is composed of a big skyrmion and several small skyrmions. In this work, by using an in-plane alternating current(AC) magnetic field, we investigate the spinwave modes of skyrmion bags, which behave differently from the clockwise(CW) rotation mode and the counterclockwise(CCW) rotation mode of skyrmions because of their complex spin topological structures. The in-plane excitation power spectral density shows that each skyrmion bag possesses four resonance frequencies. By further studying the spin dynamics of a skyrmion bag at each resonance frequency, the four spin-wave modes, i.e., a CCW-CW mode, two CW-breathing modes with different resonance strengths, and an inner CCW mode, appear as a composition mode of outer skyrmion–inner skyrmions. Our results are helpful in understanding the in-plane spin excitation of skyrmion bags, which may contribute to the characterization and detection of skyrmion bags, as well as the applications in logic devices.

关键词： skyrmion bags spin-wave mode power spectral density micromagnetic simulation

P21-activated kinase 1 (PAK1)-mediated cytoskeleton rearrangement promotes SARS-CoV-2 entry and ACE2 autophagic degradation

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Signal Transduction and Targeted Therapy 2023年第11期8卷 5353-5367页

作者： Ming Liu Bingtai Lu Yue Li Shuofeng Yuan Zhen Zhuang Guangyu Li Dong Wang Liuheyi Ma Jianheng Zhu Jinglu Zhao Chris Chung-Sing Chan Vincent Kwok-Man Poon Kenn Ka-Heng Chik Zhiyao Zhao Huifang Xian Jingxian Zhao Jincun Zhao Jasper Fuk-Woo Chan Yuxia Zhang Guangzhou Institute of Pediatrics Guangzhou Women and Children's Medical CentreState Key Laboratory of Respiratory DiseasesGuangzhou Medical University510623 GuangzhouGuangdongChina Medical Research Institute Guangdong Provincial People's Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangdongChina State Key Laboratory of Emerging Infectious Diseases Carol Yu Centre for InfectionDepartment of MicrobiologySchool of Clinical MedicineLi Ka Shing Faculty of MedineThe University of Hong KongPokfulamHong KongChina Department of Clinical Microbiology and Infection Control The University of Hong Kong Shenzhen HospitalShenzhenGuangdongChina Centre for Virology Vaccinology and TherapeuticsHong Kong Science and Technology ParkHong KongChina State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseaseGuangzhou Institute of Respiratory Healththe First Affliated Hospital of Guangzhou Medical UniversityGuangzhouChina The Third Afliated Hospital of Zhengzhou University 450052 ZhengzhouChina Guangzhou Laboratory GuangzhouGuangdong ProvinceChina chongqing International Institute for Immunology ChongqingChina

Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),the causative agent of coronavirus disease 2019(COVID-19),has had a significant impact on healthcare systems and economies *** continuous emergence of new viral strains presents a major challenge in the development of effective antiviral *** that possess broad-spectrum antiviral activities are desirable to control SARS-CoV-2 ***2,an angiotensin-containing enzyme that prevents the overactivation of the renin angiotensin system,is the receptor for ***2 interacts with the spike protein and facilitates viral attachment and entry into host ***,SARS-CoV-2 infection also promotes ACE2 *** restoring ACE2 surface expression has an impact on SARS-CoV-2 infection is yet to be ***,we show that the ACE2-spike complex is endocytosed and degraded via autophagy in a manner that depends on clathrin-mediated endocytosis and PAK1-mediated cytoskeleton *** contrast,free cellular spike protein is selectively cleaved into S1 and s2 subunits in a lysosomal-dependent ***,we show that the pan-PAK inhibitor FRAX-486 restores ACE2 surface expression and suppresses infection by different SARS-CoV-2 ***-486-treated Syrian hamsters exhibit significantly decreased lung viral load and alleviated pulmonary inflammation compared with untreated *** summary,our findings have identified novel pathways regulating viral entry,as well as therapeutic targets and candidate compounds for controlling the emerging strains of SARS-CoV-2 infection.

关键词： ACE2 inflammation rearrangement

Shadows and observational appearance of a new family of Ayón-Beato-García black holes

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Communications in Theoretical Physics 2022年第12期74卷 87-96页

作者： Ping-Hui Mou Yun-Xian Chen Ke-Jian He Guo-Ping Li School of Physics and Astronomy China West Normal UniversityNanchong 637000China Department of Physics and chongqing Key Laboratory for Strongly Coupled Physics Chongqing UniversityChongqing 401331China

In this paper,we study the shadows and observational appearance of the Ayón-Beato-García(ABG)black hole,which is surrounded by a thin disk *** a four-dimensional ABG black hole,as the charge q increases,the event horizon r+,radius rp and impact parameter bp of the photon sphere decrease,while the maximum value of effective potential Veff ***,as the termγassociated with nonlinear electrodynamics increases,the related physical quantities r+,rp and bp increase,but the maximum value of Veff *** the light ray reaches the vicinity of the ABG black hole,one can observe the trajectories of the light rays appearing as three types,i.e.,direct emission,lens ring and photon ***,the shadows and the observational appearance of the ABG black hole are *** results show that the charge q and the termγhave a great influence on the shape and intensity of the black hole *** the relevant state parameters change or the emission model changes,it can be argued that it is the direct emission that plays a decisive role in the total observed intensity of the ABG black hole,while the contribution of the lens ring to the total observed intensity is small and the photon ring makes almost no contribution.

关键词： black hole shadow thin disk accretion rings

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使用移液器吸头培养三维肿瘤球（英文）

Journal of Zhejiang University-science A(Applied Physics & Engineering) 2023年第10期 875-886页

作者：潘茸杨晓艳武士铭谢媛媛陈凤宁珂孙伟余玲西南大学材料与能源学院清洁能源与先进材料研究所发光分析与分子传感教育部重点实验室海南师范大学化学化工学院

目的：三维细胞培养相较于常规的二维培养在模拟肿瘤微环境上具备很大的优势。本文旨在将移液器吸头（商品化且实验室通用的一种耗材）作为独特的细胞培养容器进行细胞培养，以实现高通量、简单、省时且经济高效的三维细胞球培养。创新... 详细信息

目的：三维细胞培养相较于常规的二维培养在模拟肿瘤微环境上具备很大的优势。本文旨在将移液器吸头（商品化且实验室通用的一种耗材）作为独特的细胞培养容器进行细胞培养，以实现高通量、简单、省时且经济高效的三维细胞球培养。创新点：1.将移液器吸头作为细胞培养容器，其实验过程未涉及任何机械加工和化学处理，因此极大地简化了肿瘤球培养实验过程，为实验条件有限的实验室提供了三维细胞培养的替代方案；2.该培养平台集稳定、便捷、省时、低成本和高通量于一体；3.该平台在培养过程中可进行原位观测；4.除了用于细胞球的培养外，该培养方式还展示出在肿瘤球融合和药物筛选等方面的应用潜力。方法：1.将细胞悬液吸到移液器吸头中，并将吸头置于吸头盒内，然后放入细胞培养箱里进行常规细胞培养。2.培养24 h后，在显微镜下观察细胞团聚形成三维细胞球；可直接推动移液器按钮进行细胞球的转移和后续分析。3.将两个或多个在吸头内形成的细胞球转移到同一个吸头，实现多个肿瘤球的配对和融合。4.待细胞成球后，在移液器吸头内加入药物，评价药物的细胞毒性。结论：1.将移液器吸头作为三维细胞培养平台，通过简单地抽吸和培养，即可在短时间内高通量地获得细胞球。2.成功构建了两种肿瘤细胞（DU145）与血管内皮细胞（HUVEC）的共培养模型。3.两个或多个细胞球可通过配对和融合组装成更大的细胞聚集体，显示了该平台在微组织工程领域中的应用前景。4.成功在移液器吸头内完成了原位药物筛选；不同浓度的阿霉素会对移液器吸头中的细胞球造成不同程度的损伤。

关键词：移液器吸头三维细胞培养肿瘤球共培养原位观测

Surface Enhanced Raman Scattering Revealed by Interfacial Charge-Transfer Transitions

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The Innovation 2020年第3期1卷 92-113页

作者： Shan Cong Xiaohong Liu Yuxiao Jiang Wei Zhang Zhigang Zhao Key Lab of Nanodevices and Applications Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences(CAS)Suzhou 215123China chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China

Surface enhanced Raman scattering(SERS)is a fingerprint spectral technique whose performance is highly dependent on the physicochemical properties of the substrate *** addition to the traditional plasmonic metal substrates that feature prominent electromagnetic enhancements,boosted SERS activities have been reported recently for various categories of non-metal materials,including graphene,MXenes,transition-metal chalcogens/oxides,and conjugated organic *** the structural compositions of these semiconducting substrates vary,chemical enhancements induced by interfacial charge transfer are often the major contributors to the overall SERS behavior,which is distinct from that of the traditional SERS based on plasmonic *** charge-transfer-induced SERS enhancements,this short review introduces the basic concepts underlying the SERS enhancements,the most recent semiconducting substrates that use novel manipulation strategies,and the extended applications of these versatile substrates.

关键词： SERS CHARGE TRANSFER SEMICONDUCTOR CHEMICAL MECHANISM DEFECT ENGINEERING

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螺旋锥齿轮端铣加工刀位计算方法（英文）

机床与液压 2017年第6期45卷 13-19页

作者：郭晓东王戈张卫青黄刚马朋朋重庆理工大学机械工程学院重庆400054

针对螺旋锥齿轮在数控加工中心上加工效率低的问题,提出利用盘状铣刀对螺旋锥齿轮进行端铣的加工方法。由螺旋锥齿轮齿面及刀具的几何特征,调整铣刀与被加工齿面的相对位置,使齿面与刀具包络面的法截面相对法曲率最小,增大切削带宽,同... 详细信息

针对螺旋锥齿轮在数控加工中心上加工效率低的问题,提出利用盘状铣刀对螺旋锥齿轮进行端铣的加工方法。由螺旋锥齿轮齿面及刀具的几何特征,调整铣刀与被加工齿面的相对位置,使齿面与刀具包络面的法截面相对法曲率最小,增大切削带宽,同时控制刀轴矢量调整切削深度避免加工干涉。最后将规划的加工刀位转化到数控机床轴上,利用VERICUT进行加工仿真验证该方法的可行性与正确性。

关键词：螺旋锥齿轮盘状铣刀数控加工中心加工刀位

Construction of Photoresponsive 3D Structures Based on Triphenylethylene Photochromic Building Blocks

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Research 2022年第4期2022卷 87-96页

作者： Xiayu Zhang Fukang Liu Beibei Du Rongjuan Huang Simin Zhang Yunfei He Hailan Wang Jingjing Cui Biao Zhang Tao Yu Wei Huang Frontiers science Center for Flexible Electronics Shaanxi Institute of Flexible Electronics Shaanxi Institute of Biomedical Materials and EngineeringNorthwestern Polytechnical University127 West Youyi RoadXi'an 710072China Key Laboratory of Flexible Electronics e Institute of Advanced Materials Nanjing Tech University30 South Puzhu RoadNanjing211816China State Key Laboratory of Organic Electronics and Information Displays e Institute of Advanced Materials(IAM) Nanjing University of Posts Telecommunications9 Wenyuan RoadNanjing 210023China

Photoresponsive materials have been widely used in sensing,bioimaging,molecular switches,information storage,and encryption *** a large amount of photoresponsive materials have been reported,the construction of these smart materials into precisely prescribed complex 3D geometries is rarely *** we designed a novel photoresponsive material methyl methacrylate containing triphenylethylene(TrPEF_(2)-MA)that can be directly used for digital light processing(DLP)3D *** on TrPEF_(2)-MA,a series of photoresponsive 3D structures with reversible color switching under ultraviolet/visible light irradiations were *** complex photoresponsive 3D structures show high resolutions(50μm),excellent repeatability(25 cycles without fatigue),and tunable saturate color *** DLP 3D printing processes were also carried out to demonstrate their great properties in information hiding and information-carrying *** design strategy for constructing photoresponsive 3D structures is attractive in the area of adaptive camouflage,information hiding,information storage,and flexible electronics.

关键词： properties prescribed attractive