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Boosting Interfacial Polarization Through Heterointerface Engineering in MXene/Graphene Intercalated-Based Microspheres for Electromagnetic Wave Absorption

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Nano-Micro Letters 2023年第9期15卷 436-460页

作者： Ge Wang Changfeng Li Diana estevez Peng Xu Mengyue Peng Huijie Wei Faxiang Qin Institute for Composites Science Innovation(InCSI) School of Materials Science and EngineeringZhejiang University38 Zheda RoadHangzhou 310027People’s Republic of China Ningbo Institute of Technology Zhejiang University1 Qianhu South RdNingbo 315100People’s Republic of China Foshan(Southern China)Institute for New Materials FoshanPeople’s Republic of China

Multi-layer 2D material assemblies provide a great number of interfaces beneficial for electromagnetic wave absorption.However,avoiding agglomeration and achieving layer-by-layer ordered intercalation remain chal-lenging.Here,3D reduced graphene oxide(rGO)/MXene/TiO_(2)/Fe_(2)C lightweight porous microspheres with periodical intercalated structures and pronounced inter-facial effects were constructed by spray-freeze-drying and microwave irradiation based on the Maxwell–Wagner effect.Such approach reinforced interfacial effects via defects introduction,porous skeleton,multi-layer assembly and multi-compo-nent system,leading to synergistic loss mechanisms.The abundant 2D/2D/0D/0D intercalated heterojunctions in the microspheres provide a high density of polari-zation charges while generating abundant polarization sites,resulting in boosted interfacial polarization,which is verified by CST Microwave Studio simulations.By precisely tuning the 2D nanosheets intercalation in the heterostructures,both the polarization loss and impedance matching improve significantly.At a low filler loading of 5 wt%,the polarization loss rate exceeds 70%,and a minimum reflection loss(RLmin)of-67.4 dB can be achieved.Moreover,radar cross-section simulations further confirm the attenuation ability of the optimized porous microspheres.These results not only provide novel insights into understanding and enhancing interfacial effects,but also constitute an attractive platform for implementing heterointerface engineering based on customized 2D hierarchical architectures.

关键词： MXene Hierarchical microspheres Interfacial polarization Spray-freeze-drying Microwave absorption

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基于功能纤维的超复合材料设计理念（英文）

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中国材料进展 2019年第4期38卷 319-340页

作者：秦发祥 Diana estevez 彭华新浙江大学材料科学与工程学院功能复合材料与结构研究所

超材料由于在微波器件、完美镜片和电磁隐身等多方面的应用潜力,引起了很多关注。典型的传统超材料可以金属线和开口环以周期性结构构建而成。然而,这种设计的尺寸太小,并且不适用于基于超材料的大规模应用。在这篇综述中,我们将展示一... 详细信息

超材料由于在微波器件、完美镜片和电磁隐身等多方面的应用潜力,引起了很多关注。典型的传统超材料可以金属线和开口环以周期性结构构建而成。然而,这种设计的尺寸太小,并且不适用于基于超材料的大规模应用。在这篇综述中,我们将展示一种特殊类型的超材料,我们称为超复合材料:即具有超材料特性的纤维增强的复合材料。其中重点讲述了磁性微丝阵列使役的超复合材料及其在复合材料构件的结构健康监测、雷达天线罩中的频率选择性响应等一系列工程场景中的典型应用示例。在这种超复合材料中,负磁导率是由铁磁共振引起的,负介电常数是由等离子体响应实现的,等离子体响应由添加相的尺寸和拓扑结构等几何参数决定。该种材料在简化设计、实现面内各向同性性能以及应力、磁场和电流驱动的性能可调性方面具有优势。此外,可以通过调控纤维填料在组成、长度、直径的本征特征、进行后处理、或者与其他材料进行混杂等方式进行优化设计,以实现最佳的调谐能力,从而实现预期的应用。除了聚焦超复合材料设计理念之外,还详尽阐述了自动化制造过程和制备出来的材料的结构性能,以期获得真正实用的多功能复合材料。

关键词：超材料超复合材料负介电常数负磁导率透射窗口磁性纤维阵列磁性纤维复合材料

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Flexural Strength and Weibull Analysis of Bulk Metallic Glasses

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Journal of Materials Science & Technology 2016年第2期32卷 129-133页

作者： Jijun Zhang Diana estevez Yuan-Yun Zhao Lishan Huo Chuntao Chang Xinmin Wang Run-Wei Li Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and EngineeringChinese Academy of SdencesNingho 315201China

The flexural strength reliability of bulk metallic glasses （BMGs） plates is analyzed using Weibull statistics. The Weibull modulus （m） and characteristic strength （σ0） of the Zr48Cu45AI7 BMG are 34 and 2630 MPa, respectively, which are much higher than the values of fine ceramics （m 〈 30, σ0 〈 1600 MPa）. In particular, the m values obtained by flexural strength and compressive strength statistics of the Mg61Cu28Gd11 BMG are 5 and 33, respectively, indicating that the m values of BMGs are test method dependent, and only the m values obtained by flexural strength statistics can be used to make a convincible comparison with those of ceramics.

关键词： Bulk metallic glasses Ceramics Weibu Umodulus Flexural strength Mechanical properties

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Filling the Gaps to Solve the Extensin Puzzle

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Molecular Plant 2018年第5期11卷 645-658页

作者： Eliana Marzol Cecilia Borassi Mauro Bringas Ana Sede diana Rosa Rodriguez Garcia Luciana Capece Jose M. estevez Fundacion Instituto Leloir and Instituto de Investigaciones Bioquimicas de Buenos Aires (IIBBA-CO.NICEr) Avenida Patricias Argentinas 435 Buenos AiresCP C1405BWE Argentina Departamento de Quimica Inorganica Analitica y Quimica Fisica Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires (INQUIMAE-CONICET)Buenos Aires CP C1428EGA Argentina Instituto de Investigaciones en Ingenierfa Genetica y Biologia Molecular Dr. Hector Torres (INGEBI-CONICET) Vuelta de Obligado 2490 Buenos Aires C1428ADNArgentina

Extensins （EXTs） are highly repetitive plant O-glycoproteins that require several post-translational modifi- cations （PTMs） to become functional in plant cell walls. First, they are hydroxylated on contiguous proline residues; then they are O-glycosylated on hydroxyproline and serine. After secretion into the apoplast, O-glycosylated EXTs form a tridimensional network organized by inter- and intra-Tyr linkages. Recent studies have made significant progress in the identification of the enzymatic machinery required to process EXTs, which includes prolyl 4-hydroxylases, glycosyltransferases, papain-type cysteine endopeptidases, and peroxidases. EXTs are abundant in plant tissues and are particularly important in rapidly expanding root hairs and pollen tubes, which grow in a polar manner. Small changes in EXT PTMs affect fastgrowing cells, although the molecular mechanisms underlying this regulation are unknown. In this review, we highlight recent advances in our understanding of EXT modifications throughout the secretory pathway, EXT assembly in cell walls, and possible sensing mechanisms involving the Catharanthus roseus cell surface sensor receptor-like kinases located at the interface between the apoplast and the cytoplasmic side of the plasma membrane.

关键词： Arabidopsis thaliana cysteine endopeptidases extensins glycosyltransferases peroxidases prolyl 4-hydroxylases

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Male age and strain affect ejaculate quality in the Mexican fruit fly

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Insect Science 2018年第4期25卷 703-711页

作者： Mariana Herrera-Cruz Solana Abraham Nicolas NuSez-Beverido Norma Flores-estevez Martha Reyes-Hernandez Mayvi Alvarado diana P6rez-Staples Catedra CONACYT- Facultad de Medicina y Cirugia Universidad Autonoma 'Benito Juarez' de Oaxaca Oaxaca Mexico Laboratorio de Investigaciones Ecoetologicas de Moscas de la Fruta y sus Enemigos Naturales (LIEMEN) PROIMI Tucuman Argentina CONICET Argentina INBIO TECA Universidad Veracruzana Xalapa Veracruz Mexico Instituto de Neuroetologia Universidad Veracruzana Xalapa Veracruz Mexico

Aging in all organisms is inevitable. Male age can have profound effects on mating success and female reproduction, yet relatively little is known on the effects of male age on different components of the ejaculate. Furthermore, in mass-reared insects used for the Sterile Insect Technique, there are often behavioral differences between mass-reared and wild males, while differences in the ejaculate have been less studied. The ejaculate in insects is composed mainly of sperm and accessory gland proteins. Here, we studied how male age and strain affected （i） protein quantity of testes and accessory glands, （ii） the biological activity of accessory gland products injected into females, （iii） sperm viability, and （iv） sperm quantity stored by females in wild and mass-reared Anastrepha ludens （Diptera： Tephritidae）. We found lower protein content in testes of old wild males and lower sperm viability in females mated with old wild males. Females stored more sperm when mated to young wild males than with young mass-reared males. Accessory gland injections of old or young males did not inhibit female remating. Knowledge of how male age affects different ejaculate components will aid our understanding on investment of the ejaculate and possible postcopulatory consequences on female behavior.

关键词： accessory glands age Anastrepha ludens mass-rearing sperm Tephritidae

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The tip of the iceberg:ROP2 directly interacts with SYP121 to regulate root-hair polarization,elongation,and exocytosis

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Molecular Plant 2022年第7期15卷 1084-1086页

作者： Martiniano M.Ricardi Jose M.estevez Instituto de Fisiología Biología Molecular y Neurociencias(IFIBYNE-UBA-CONICET)and Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresCiudad UniversitariaBuenos Aires C1428EHAArgentina Fundación Instituto Leloir and IIBBA-CONICET.Av.Patricias Argentinas 435 Buenos Aires C1405BWEArgentina Centro de Biotecnología Vegetal Facultad de Ciencias de la VidaUniversidad Andres BelloSantiago 8370146Chile ANID-Millennium Science Initiative Program-Millennium Nucleus for the Development of Super Adaptable Plants(MN-SAP) Santiago 8370146Chile

Root hairs(RHs)grow in a polar manner as cylindrical protrusions from the root epidermis.They significantly expand the root volume in the rhizosphere to search for water and nutrients,anchor the plant,and promote interactions with several kinds of microorganisms in the soil.Trichoblasts,the epidermis cell type responsible for RH development,switch from anisotropic cell elongation to tip growth through polarization of the growth machinery to a predefined RH initiation domain(RHID)at the plasma membrane.

关键词： tip polarization cylindrical

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Two titans fin ally meet each other under nitrogen deficiencies:FERONIA-TORC1 activation promotes plant growth

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Molecular Plant 2022年第7期15卷 1095-1097页

作者： Javier Martinez Pacheco Jose M.estevez Fundación Instituto Leloir and IIBBA-CONICET.Av.Patricias Argentinas 435 Buenos Aires C1405BWEArgentina Centro de Biotecnología Vegetal Facultad de Ciencias de la VidaUniversidad Andres BelloSantiagoChile ANID-Millennium Science Initiative Program-Millennium Nucleus for the Development of Super Adaptable Plants(MN-SAP) SantiagoChile

Plant growth is determined by well-defined developmental processes that integrate cell-intrinsic factors and external environmental cues,and it is largely dependent on the assimilation of macro-and micro-nutrients from the environment.Between the macro-nutrients,the inorganic nitrogen(e.g.,nitrate and ammonium)and amino acids are essential for plant survival and productivity.Beyond acting as macro-nutrients and structural components of macro-molecules,these nitrogen-containing molecules could also act as signaling molecules to orchestrate diverse genetic programs(Wang et al.,2018).

关键词： activation inorganic nitrate

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Auxin signaling gets oxidative to promote root hair growth

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Molecular Plant 2024年第5期17卷 696-698页

作者： Victoria Berdion Gabarain Miguel A.Ibeas Hernan Salinas-Grenet Jose M.estevez Fundación Instituto Leloir&IIBBA-CONICET Av.Patricias Argentinas 435Buenos Aires C1405BWEArgentina Centro de Biotecnología Vegetal Facultad de Ciencias de la VidaUniversidad Andres BelloSantiagoChile ANID Millennium Science Initiative ProgramMillennium Nucleus for the Development of Super Adaptable Plants(MN-SAP)SantiagoChile ANID Millennium Science Initiative ProgramMillennium Institute for Integrative Biology(iBio)SantiagoChile

Root hairs(RHs)emerge as cylindrical cell protrusions from the root epidermis in a polar manner,and these outgrows increase the rhizosphere space to acquire water and nutrients,anchor the plant,and interact with various soil microorganisms.Auxin is one of the key hormones to promote RH growth,and high levels of auxin are directly promoted by low levels of macronutrients in the soil,such as phosphate(Bhosale et al.,2018)and nitrates(Jia et al.,2023).The nutritional signals for roots,which rapidly change in both time and place within the soil,are tightly linked to signaling pathways that execute swifts on cellular processes to adjust to a challenging environment.Plant rapid alkalinization factors(RALFs)are peptides that are released outside the cell and act as peptide-hormone signals.They attach to the extracellular domains of members of the Catharanthus roseus RECEPTOR-LIKE KINASE 1-LIKE family,specifically FERONIA(FER)in conjunction with its co-receptor LORELEI-LIKE-GPIANCHORED PROTEIN 1.

关键词： soil outside alkali

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Impact of Airbnb’s Brand Positioning on Marketing Strategies of Chinese Real Estate Agencies

Impact of Airbnb’s Brand Positioning on Marketing Strategie...

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作者： Mathias Mickael Sylvestre estevez 上海交通大学

学位级别：硕士

Over the past few decades,number of students opting to study abroad for the effective completion of their higher educational degree has grown at a rapid rate.Therefore,it has become extremely important for the universities and educational institutes to ensure safe and unbiased facilities for the international students so that they can complete their studies effectively.In the context of China,the government has enhanced the associated factors which include the several government regulations and facilities,real estate infrastructure,and cost of education.The following study has concentrated on the city of Shanghai in China in order to examine the extent,to which appropriate delivery of real estate techniques has increased the ability to attract the overseas students.In order to evaluate the influences that the real estate agencies have on the process of attracting the foreign student,the study has concentrated on finding the answers to the following research question:“How can Chinese real estate agencies benefit from brand positioning strategies used by Airbnb and improve on their brand positioning in order to reach and attract more international students to China?”Literature ReviewThe review of relevant literature has helped the researcher in identifying the reasons,which encourage foreign students to pursue higher education in China.This has helped understand the exact reasons behind the incoming of large number of international students.Shanghai has witnessed the second highest number of international students in China as it is deemed the economic and financial hub of the country,which presents opportunities for internships and further job opportunities.The reasons identified include the availability of the top-rated universities,adequate infrastructure,government initiatives and variety of available coursework.Moreover,the educational institutions in China provide premium education at affordable rates.In addition,the accommodation facilities in China are available at substantially lower cost as compared to the

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A charged star with geometric Karmarkar condition

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Communications in Theoretical Physics 2023年第8期75卷 139-149页

作者： Gabino estevez-Delgado Joaquin estevez-Delgado Rafael Soto-Espitia Antonio Rendón Romero Jorge Mauricio Paulin-Fuentes Facultad de Químico Farmacobiología de la Universidad Michoacana de San Nicolás de Hidalgo Facultad de Ciencias Físico Matemáticas de la Universidad Michoacana de San Nicolás de Hidalgo Edificio BCiudad Universitaria Facultad de Ingeniería Civil de la Universidad Michoacana de San Nicolás de Hidalgo Edificio A Ciudad Universitaria Facultad de Ingeniería Mecánica de la Universidad Michoacana de San Nicolás de Hidalgo Edificio W Ciudad Universitaria División Académica de Ciencias Básicas de la Universidad Juárez Autónoma de Tabasco

In this paper,we analyse an analytical solution of the Einstein–Maxwell field equations that considers matter with anisotropic pressures in a static and spherically symmetric geometry.We report the manner in which we obtained the solution,which is by means of the Karmarkar condition.For the model,we assume a state equation that describes the interaction of matter from quarks P=(c^(2)ρ-4B_(g))/3 and we consider the presence of electric charge,which can generate that the radial and tangential pressures are not equal.In a graphic manner,we analyse the physical properties of the model,taking as the observational data those of mass 1M⊙and radius7.69 km which were reported for the star Her X-1.The charge values are found between 5.57×10^(18)C≤Q≤1.31×10^(20)C and the interval of the Bag constant Bg∈[118.7,122.13]MeV/fm^(3).Also,we show the stability of the configuration by means of the static stability criteria of Harrison–Zeldovich–Novikov((?M)/?ρc>0),as well as in regards to infinitesimal radial adiabatic perturbation,since the adiabatic indexγ>3.3 which guarantees the stability of the solution.

关键词： general relativity exact solutions anisotropic fluid Karmarkar condition

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