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ZnO/CeO_(2)/carbon xerogel composites with direct Z-scheme heterojunctions:Enhancing photocatalytic remediation of 4-chlorophenol under visible light

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Journal of Rare Earths 2024年第2期42卷 314-322,I0003页

作者： Nicolas Perciani de Moraes Maite Birkett de Campos Sanmartin Robson da Silva Rocha Abner de Siervo Marcos Roberto de Vasconcelos Lanza D.Amaranatha Reddy Lianqing Yu Liana Alvares Rodrigues escola de engenharia de Lorena-EEL/USP Estrada Municipal do Campinho S/NCEP 12602-810LorenaSao PauloBrazil Institute of Physics"Gleb Wataghin" Applied Physics DepartmentState University of Campinas13083-859CampinasSPBrazi Instituto de Quimica de sao carlos Universidade de Sao PauloAv.Trab.Sao Carlense400-Parque Arnold SchimidtSao CarlosSP13566-590Spain department of Sciences Indian Institute of Information Technology Design and ManufacturingKurnoolAndhra Pradesh518007India School of Materials Science and Engineering China University of PetroleumQingdao266580China

This paper aims to create visible light driven ternary photocatalysts using zinc oxide(ZnO),cerium(IV)oxide(CeO_(2)),and carbon xerogel(CX) as constituent *** use of CeO_(2) is based on the creation of direct-Z-scheme heterojunctions with the ZnO and the consequent diminishing of charge recombination,whereas the carbon xerogel inclusion is predicted to minimize bandgap energy,decrease electro n-hole reco mbination,and boost specific surface *** re,the choice of the black-wattle tannin as a carbonaceous precursor was targeted at the development of an environmentally friendly and affordable *** existence of the hexagonal phase of zinc oxide and cubic structure of the cerium(IV) oxide in the ternary material was confirmed by X-ray diffractometry and X-ray photoelectron spectroscopy,with the latter also suggesting chemical bonding between the ZnO and the CX due to the creation of zinc oxycarbide *** inclusion of the carbon xerogel provokes a significant modification in the morphology of the ternary material,resulting in an increased surface area and smaller particle *** CX/ZnO-CeO_(2) ternary composite obtains the highest photocatalytic efficiency among all the materials studied,degrading 100% of 4-chlorophenol under simulated sunlight and 68% under visible radiation,after 5 *** increased photocatalytic activity can be attributed to the formation of direct Z-scheme heterojunctions between the semiconductors,higher visible light response,and higher specific surface area,as evidenced by the results obtained by active radical scavenging,chronoamperometry,diffuse reflectance spectroscopy,and N_(2) adsorption-desorption isotherms.

关键词： Zinc oxide Cerium(Ⅳ)oxide Carbon xerogel Photocatalysis Direct Z-scheme heterojunction 4-Chlorophenol Rare earths

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Black hole images:A review

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Science China(Physics,Mechanics & Astronomy) 2023年第6期66卷 101-117页

作者： Songbai Chen Jiliang Jing Wei-Liang Qian Bin Wang department of Physics Synergetic Innovation Centerfor Quantum Effects and ApplicationsHunan Normal UniversityChangsha 40081China Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China escola de engenharia de Lorena Universidade de Sao PauloSao Paulo 12602-810Brazil Faculdade de engenharia de Guaratingueta Universidade Estadual PaulistaSao Paulo 12516-410Brazil School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai 200240China

In recent years,unprecedented progress has been achieved regarding black holes’observation through the electromagnetic *** images of the supermassive black holes M87*and Sgr A*released by the Event Horizon Telescope(EHT)Collaboration provided direct visual evidence for their existence,which has stimulated further studies on various aspects of the compact celestial ***,the information stored in these images provides a new way to understand the pertinent physical processes that occurred near the black holes,to test alternative theories of gravity,and to furnish insight into fundamental *** this review,we briefiy summarize the recent developments on the *** particular,we elaborate on the features and formation mechanism of black hole shadows,the properties of black hole images illuminated by the surrounding thin accretion disk,and the corresponding polarization *** potential applications of the relevant studies are also addressed.

关键词： black hole shadow accretion disk polarization image

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Shadows of magnetically charged rotating black holes surrounded by quintessence

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Chinese Physics C 2022年第6期46卷 246-256页

作者：孙呈祥刘云旗钱卫良岳瑞宏 Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China escola de engenharia de Lorena Universidade de Sao Paulo12602-810LorenaSPBrazil School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai 200240China Faculdade de engenharia de Guaratingueta Universidade Estadual Paulista12516-410GuaratingueiaSPBrazil

In this work,we study the optical properties of a class of magnetically charged rotating black hole *** black holes in question are assumed to be immersed in the quintessence field,and subsequently,the resulting black hole shadows are expected to be modified by the presence of dark *** investigate the photon region and the black hole shadow,especially their dependence on the relevant physical conditions,such as the quintessence state parameter,angular momentum,and magnetic charge *** photon regions depend sensitively on the horizon structure and possess intricate ***,from the viewpoint of a static observer,we explore a few observables,especially those associated with the distortion of the observed black hole shadows.

关键词： black hole shadow quintessence magnetically charged rotating black hole

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Poly(Butylene Adipate-Co-Terephthalate)and Poly(ε-Caprolactone)and Their Bionanocomposites with Cellulose Nanocrystals:Thermo-Mechanical Properties and Cell Viability Study

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Journal of Renewable Materials 2019年第3期7卷 269-277页

作者： Marcia Cristina Branciforti Caroline Faria Bellani Carolina Lipparelli Morelli Alice Ferrand Nadia Benkirane-Jessel Rosario Elida Suman Bretas departamento de engenharia de Materiais Universidade de Sao PauloSao CarlosSPBrasil departamento de engenharia de Materiais Universidade Federal de Sao CarlosSao CarlosSPBrasil Institut National de la Santéet de la Recherche Médicale Universitéde StrasbourgStrasbourgFrance

Although nanocomposites have recently attracted special interest in the tissue engineering area,due to their potential to reinforce scaffolds for hard tissues applications,a number of variables must be set prior to any clinical *** manuscript addresses the evaluation of thermo-mechanical properties and of cell proliferation of cellulose nanocrystals(CNC),poly(butylene adipate-co-terephthalate)(PBAT),poly(ε-caprolactone)(PCL)films and their bionanocomposites with 2 wt% of CNC obtained by casting *** nanocrystals extracted from Balsa wood by acid hydrolysis were used as a reinforcing phase in PBAT and PCL matrix *** films and pure CNC at different concentrations were cultured with osteoblasts MG-63 and the cell proliferation was assessed by AlamarBlue?*** thermal-mechanical properties of the films were evaluated by dynamic-mechanical thermal analysis(DMTA).It was found by DMTA that the CNC acted as reinforcing *** addition of CNCs in the PBAT and PCL matrices induced higher storage moduli due to the reinforcement effects of *** cell viability results showed that neat CNC favored osteoblast proliferation and both PBAT and PCL films incorporated with CNC were biocompatible and supported cell proliferation along *** nature of the polymeric matrix or the presence of CNC practically did not affect the cell proliferation,confirming they have no in vitro *** features make cellulose nanocrystals a suitable candidate for the reinforcement of biodegradable scaffolds for tissue engineering and biomedical applications.

关键词： Cell viability thermo-mechanical properties cellulose nanocrystals(CNC) biocompatible polymers tissue engineering bionanocomposites

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Quasinormal Modes of the Planar Black Holes of a Particular Lovelock Theory

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Communications in Theoretical Physics 2018年第12期69卷 689-694页

作者：文丹林凯钱卫良 Faculdade de engenharia de Guaratingueta Universidade Estadual Paulista Hubei Subsurface Multi-Scale Imaging Key Laboratory Institute of Geophysics and GeoinformaticsChina University of Geosciences escola de engenharia de Lorena Universidade de Sao Paulo

In this work, we study the scalar quasinormal modes of a planar black hole metric in asymptotic anti-de Sitter spacetime derived from a particular Lovelock theory. The quasinormal frequencies are evaluated by adopting the Horowitz-Hubeny method as well as a matrix formalism. Also, the temporal evolution of small perturbations is studied by using finite difference method. The roles of the dimension of the spacetime, the parameter of the metric k, as well as the temperature of the background black hole, are discussed. It is observed that the particular form of the metric leads to quasinormal frequencies whose real parts are numerically insignificant. The black hole metric is found to be stable against small scalar perturbations.

关键词： quasinormal modes Lovelock theory Horowitz-Hubeny method matrix method

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Comparing shoulder maneuvers to magnetic resonance imaging and arthroscopic findings in patients with supraspinatus tears

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World Journal of Orthopedics 2022年第1期13卷 102-111页

作者： Fabio Anauate Nicolao Joao Alberto Yazigi Junior Fabio Teruo Matsunaga Nicola Archetti Netto Joao carlos Belloti Marcel Jun Sugawara Tamaoki Orthopedics and Traumatology department Escola Paulista de Medicina–Universidade Federal de São Paulo–UNIFESPSao Paulo 04038-001Brazil Orthopedics and Traumatology Discipline Universidade de Santo Amaro–UNISASao Paulo 04829-300Brazil

BACKGROUND Shoulder maneuvers and magnetic resonance imaging(MRI)are performed to diagnose supraspinatus tendon tears regardless of arthroscopy *** there are many studies on this subject,there is a lack of studies comparing the sensitivity(Se)and specificity(Sp)of shoulder maneuvers and MRI to arthroscopic findings(intact,partial,or full thickness supraspinatus tendon tear).AIM To compare the diagnostic values of shoulder maneuvers with MRI for supraspinatus tendon tears in patients undergoing shoulder *** A total of 199 consecutive patients from four orthopedic centers met the eligibility criteria of shoulder pain persisting for at least four *** were prospectively enrolled in this study from April 2017 to April *** clinical tests(full can,empty can,drop arm,Hawkins’,painful arc,Neer’s sign and resisted external rotation)and MRI were performed,and all were compared with surgical *** can,empty can and resisted external rotation tests were interpreted as positive in the case of pain and/or *** assessed the Se,Sp,accuracy,positive predictive value(PPV)and negative predictive value(NPV),positive and negative likelihood ratio and diagnostic odds ratio for overall,partial and fullthickness supraspinatus *** MRI had the highest Se for overall(0.97),partial(0.91)and full-thickness(0.99)tears;moreover,MRI had the highest NPV:0.90,0.88 and 0.98 for overall,partial and full-thickness tears,*** overall supraspinatus tears,the Se and PPV were:Painful arc(Se=0.85/PPV=0.91),empty can(pain)(Se=0.80/PPV=0.89),full can(pain)(Se=0.78/PPV=0.90),resisted external rotation(pain)(Se=0.48/PPV=0.87),drop arm(Se=0.19/PPV=0.97),Neer’s sign(Se=0.78/PPV=0.93)and Hawkins’(Se=0.80/PPV=0.88).MRI had the highest PPV(0.99).The Hawkin’s test had the highest false positive rate in patients with intact tendons(0.36).The Sp of the empty can and full can(both tests positive for pain and weakness),drop arm and MRI were:0.93,

关键词： Rotator cuff injuries Physical examination Magnetic resonance imaging Arthroscopy

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Chemical-Abrasion U-Pb zircon geochronology reveals 150 Myr of partial melting events in the Archean crust of the São Francisco Craton

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Geoscience Frontiers 2022年第5期13卷 169-189页

作者： Lorena Martins Cristiano Lana Ariela Mazoz Tiago Novo Applied Isotope Research Group Departamento de GeologiaEscola de MinasUniversidade Federal de Ouro PretoMorro do CruzeiroOuro PretoMG35400-000Brazil Universidade Federal de Minas Gerais Programa de Pós-Graduação em GeologiaIGC-CPMTCCampus PampulhaAv.Antônio Carlos 6627Belo HorizonteMG31270-901Brazil

Field observations and CA-LA-ICP-MS U–Pb zircon ages and Hf isotope compositions obtained from migmatitic orthogneisses and granitoids from the Belo Horizonte Complex,southern São Francisco Craton,indicate a major period of partial melting and production of felsic rocks in the *** observations show that the complex is an important site for studying partial melting processes of Archean crystalline *** of the complex exposes fine-grained stromatic migmatites that are intruded by multiple leucogranitic veins and sheeted *** migmatites and leucogranite sheets are crosscut by several phases of granitoid batholiths and small granitic bodies;both of which are closely associated with the host banded *** abrasion followed by detailed cathodoluminescence imaging revealed a wide variety of zircon textures that are consistent with a long-lived period of partial melting and crustal *** of U-Pb and Hf isotopes disclose the complex as part of a much wider crustal segment,encompassing the entire southern part of the São Francisco *** of available U-Pb ages suggests that this crustal segment was consolidated sometime between 3000 Ma and 2900 Ma and that it experienced three main episodes of partial melting before stabilization at 2600 *** partial melting episodes took place between 2750 Ma and 2600 Ma as a result of tectonic accretion and peeling off the lithospheric mantle and lower *** process is likely responsible for the emplacement of voluminous potassic granitoids across the entire São Francisco *** believe that the partial melting of Meso-Archean crystalline crust and production of potassic granitoids are linked to a fundamental shift in the tectonics of the craton,which was also responsible for the widespread intrusion of large syenitic bodies in the northern part of the craton,and the construction of layered mafic–ultramafic intrusions to the south of the BHC.

关键词： Archean São Francisco Craton Crustal reworking U-Pb geochronology Lu-Hf isotopes

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The matrix method for black hole quasinormal modes

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Chinese Physics C 2019年第3期43卷 117-125页

作者：林恺钱卫良 Hubei Subsurface Multi-scale Imaging Key Lab. Institute of Geophysics and GeomaticsChina University of Geosciences escola de engenharia de Lorena Universidade de Sao Paulo Faculdade de engenharia de Guaratingueta Universidade Estadual Paulista School of Physical Science and Technology Yangzhou University

We provide a comprehensive survey of possible applications of the matrix method for black hole quasinormal modes. The proposed algorithm can generally be applied to various background metrics, and in particular, it accommodates both analytic and numerical forms of the tortoise coordinates, as well as black hole spacetimes. We give a detailed account of different types of black hole metrics, master equations, and the corresponding boundary conditions. Besides, we argue that the method can readily be applied to cases where the master equation is a system of coupled equations. By adjusting the number of interpolation points, the present method provides a desirable degree of precision, in reasonable balance with its efficiency. The method is flexible and can easily be adopted to various distinct physical scenarios.

关键词： quasinormal modes black hole spacetime matrix method quasinormal frequency

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Hawking radiation received at infinity in higher dimensional Reissner-Nordstrom black hole spacetimes

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Chinese Physics C 2021年第8期45卷 182-189页

作者：林恺钱卫良范锡龙王斌 Elcio Abdalla Hubei Subsurface Multi-scale Imaging Key Laboratory Institute of Geophysics and GeomaticsChina University of GeosciencesWuhan 430074China escola de engenharia de Lorena Universidade de Sao Paulo12602-810LorenaSPBrazil Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China Faculadade de engenharia de Guaratingueta Universidade Estadual PaulistaGuaratinguetaSPBrazil School of Physics and Technology Wuhan UniversityWuhan 430072China Instituto de Fisica Universidade de Sao PauloSao PauloBrazil

In this study,we investigate the Hawking radiation in higher dimensional Reissner-Nordstrom black holes as received by an observer located at *** frequency-dependent transmission rates,which deform the thermal radiation emitted in the vicinity of the black hole horizon,are evaluated *** addition to those in four-dimensional spacetime,the calculations are extended to higher dimensional Reissner-Nordstrom metrics,and the results are observed to be sensitive to the spacetime dimension to an ***,we observe that the transmission coefficient practically vanishes when the frequency of the emitted particle approaches *** increases with frequency and eventually saturates to a certain *** four-dimensional spacetime,the above result is demonstrated to be mostly independent of the metric's parameter and the orbital quantum number of the particle,when the location of the event horizon,rh,and the product of the charges of the black hole and the particle qQ are ***,for higher-dimensional scenarios,the convergence becomes more ***,the difference between states with different orbital quantum numbers is observed to be more *** the magnitude of the product of charges qQ becomes more significant,the transmission coefficient exceeds *** other words,the resultant spectral flux is amplified,which results in an accelerated process of black hole *** relationship of the calculated outgoing transmission coefficient with existing results on the greybody factor is discussed.

关键词： Hawking radiation Reissner-Nordstrom black hole superradiation

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Parkinson's disease, heart disease and propolis consumption

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Journal of Integrative Medicine 2021年第5期19卷 467-468页

作者： Fulvio A.Scorza Antonio-carlos G.de Almeida Carla A.Scorza Ana C.Fiorini Josef Finsterer Disciplina de Neurociência Escola Paulista de MedicinaUniversidade Federal de Sao Paulo(EPM/UNIFESP)Sao PauloSP 04021-001Brazil Centro de Neurociências e Saúde da Mulher Escola Paulista de MedicinaUniversidade Federal de Sao Paulo(EPM/UNIFESP)Sao PauloSP04021-001Brazil departamento de engenharia de Biossistemas Universidade Federal de Sao Joao del-Rei(UFSJ)Sao Joao del-ReiMG36307-352Brazil departamento de Fonoaudiologia Escola Paulista de MedicinaUniversidade Federal de Sao Paulo(EPM/UNIFESP)Sao PauloSP04021-001Brazil Brazil-Programa de Estudos Pós-Graduado em Fonoaudiologia Pontifícia Universidade Católica de Sao Paulo(PUC-SP)Sao PauloSP04021-001Brazil Klinikum Landstrasse Messerli InstituteVienna 1210Austria

It is reported that neurodegeneration is a process that is implicated in both neuropharmacological disorders and brain aging [1].Research has shown that natural products have a wide range of pharmacological and biolog... 详细信息

关键词： Parkinson’s disease heart disease and propolis consumption

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