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Hybrid silver nanoparticles:Modes of synthesis and various biomedical applications

Electron 2024年第2期2卷 196-218页

作者： Priyanka Singh Shivang Singh Balaji Maddiboyina SaiKrishna Kandalam Tomasz Walski Raghvendra A.Bohara Centre for Interdisciplinary Research D.Y.Patil Educational SocietyKolhapurIndia department of Internal Medicine Rauta Hospital Pvt.LtdGaighatUdayapurNepal department of Medical and Scientific Communications Scientific Writing ServicesFreyr Global Regulatory Solutions&ServicesHyderabadTelanganaIndia INSERM U 1066 ‘Micro et Nanomédecines Biomimétiques-MINT’AngersFrance UniversitéAngers UMR-S1066AngersFrance department of Biomedical Engineering Wroclaw University of Science and TechnologyWroclawPoland University of Galway

In the present day,there is a growing trend of employing new strategies to synthesize hybrid nanoparticles,which involve combining various functionalities into a single nanocomposite *** modern methods differ significantly from the traditional classical approaches and have emerged at the forefront of materials *** fabrication of hybrid nanomaterials presents an unparalleled opportunity for applica-tions in a wide range of areas,including therapy to *** focus of this review article is to shed light on the different modalities of hybrid nanoparticles,providing a concise description of hybrid silver nano-particles,exploring various modes of synthesis and classification of hybrid silver nanoparticles,and highlighting their ***-tionally,we discussed core-shell silver nanoparticles and various types of core and shell combinations based on the material category,such as dielectric,metal,or *** two primary classes of hybrid silver nanoparticles were also ***,various hybrid nanoparticles and their methods of synthesis were discussed but we emphasize silica as a suitable candidate for hybridization alongside metal *** choice is due to its hydrophilic surface qualities and high surface charge,which provide the desired repulsive forces to minimize aggregation between the metal nanoparticles in the liquid *** shell encapsulation also provides chemical inertness,robustness and the adaptability to the desired hybrid ***,among all the materials used to coat metal nanoparticles;silica is highly approved.

关键词： biomedical applications hybrid silver nanoparticles polyvinylpyrrolidone silica shell surface enhanced Raman spectroscopy

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Spectral Element Discretization of the Stokes Equations in Deformed Axisymmetric Geometries

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Advances in Applied mathematics and Mechanics 2011年第4期3卷 448-469页

作者： Zakaria Belhachmi Andreas Karageorghis laboratoire de Mathematiques Informatique et ApplicationsEA CNRSUniversite de Haute AlsaceRue des Freres Lumieres68096 MulhouseFrance department of mathematics and Statistics University of CyprusP.O.Box 205371678 NicosiaCyprus

In this paper,we study the numerical solution of the Stokes system in deformed axisymmetric *** the azimuthal direction the discretization is carried out by using truncated Fourier series,thus reducing the dimension of the *** resulting two-dimensional problems are discretized using the spectral element method which is based on the variational formulation in primitive *** meridian domain is subdivided into elements,in each of which the solution is approximated by truncated polynomial *** results of numerical experiments for several geometries are presented.

关键词： Spectral element method Stokes equations variational formulation deformed geometries Fourier expansion

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Boundary Conditions for Limited Area Models Based on the Shallow Water Equations

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Communications in Computational Physics 2013年第8期14卷 664-702页

作者： Arthur Bousquet Madalina Petcu Ming-Cheng Shiue Roger Temam Joseph Tribbia The Institute for Scientific Computing and Applied mathematics Indiana UniversityBloomingtonIN 47405USA laboratoire de Mathematiques et applications UMR 6086Universite de PoitiersFrance The Institute of mathematics of the Romanian Academy BucharestRomania department of Applied mathematics National Chiao Tung UniversityHsinchuTaiwan National Center for Atmospheric Research BoulderColoradoUSA.

A new set of boundary conditions has been derived by rigorousmethods for the shallow water equations in a limited *** aim of this article is to present these boundary conditions and to report on numerical simulations which have been performed using these boundary *** new boundary conditions which are mildly dissipative let the waves move freely inside and outside the *** problems considered include a one-dimensional shallow water system with two layers of fluids and a two-dimensional inviscid shallow water system in a rectangle.

关键词： Boundary conditions finite volumes shallow water

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Thermoluminescent response of gamma irradiated Na^(+)–Cu^(+) ionexchanged silicate glass in large dose range

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Nuclear Science and Techniques 2023年第5期34卷 22-32页

作者： Safa Toumi Khaled Farah laboratoire de Physico‑Chimie des Matériaux Département de PhysiqueFacultédes Sciences de MonastirUniversitéde MonastirMonastirTunisia Institut Supérieur du Transport et de la Logistique de Sousse Universitéde Sousse4023 SousseTunisia laboratoire de Recherche en Energie et Matière Développement des Sciences Nucléaires(LR16CNSTN02)Centre National des Sciences et Technologies Nucléaires2020 Sidi‑ThabetTunisia

The introduction of metals into vitreous matrices is the origin of various interesting phenomena;in particular,the presence of copper ions in glass has been the subject of considerable research because of its numerous *** ion-exchange process is primarily used to introduce copper ions into glass *** thermoluminescence(TL)of silicate glass was studied to evaluate its potential as gamma-sensitive material for dosimetric applications;the effect of copper doping on the thermoluminescent sensitivity was investigated using the Cu-Na ion-exchange technique for different concentrations and doping conditions,over a wide dose range of 10 mGy to 100 *** results showed that Cu doping significantly improved the sensitivity of the glasses to gamma *** the ion-exchange,two peaks appeared in the glow curves at approximately 175 and 230°C,respectively,which possibly originated from the Cu^(+) centers,along with a weak TL peak at around 320℃.We also attempted to explain the origin of the observed thermoluminescence by exploiting the Electron paramagnetic resonance(EPR)*** results clearly show quenching of the TL emission with increasing copper *** present work indicates that the thermoluminescence response of these glasses to gamma rays can be reasonably measured in the range of 0.001-100 *** study also facilitates the understanding of the basic TL mechanism in this glass system.

关键词： Cu-Na ion-exchange Silicate glass Thermoluminescence Gamma irradiation Electron paramagnetic resonance

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Scalar curvatures in almost Hermitian geometry and some applications

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Science China mathematics 2022年第12期65卷 2583-2600页

作者： Jixiang Fu Xianchao Zhou Institute of mathematics Fudan UniversityShanghai 200433China department of Applied mathematics Zhejiang University of TechnologyHangzhou 310023China

On an almost Hermitian manifold, there are two Hermitian scalar curvatures associated with a canonical Hermitian connection. In this paper, two explicit formulas on these two scalar curvatures are obtained in terms of the Riemannian scalar curvature, norms of the components of the covariant derivative of the fundamental 2-form with respect to the Levi-Civita connection, and the codifferential of the Lee form. Then we use them to get characterization results of the K?hler metric, the balanced metric, the locally conformal K?hler metric or the k-Gauduchon metric. As corollaries, we show partial results related to a problem given by Lejmi and Upmeier(2020) and a conjecture by Angella et al.(2018).

关键词： J-scalar curvature canonical Hermitian connection Hermitian scalar curvature the first Chern form balanced metric k-Gauduchon metric

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EXISTENCE AND UNIQUENESS OF PERIODIC SOLUTIONS FOR GRADIENT SYSTEMS IN FINITE DIMENSIONAL SPACES

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Acta Mathematica Scientia 2016年第1期36卷 233-243页

作者： Sahbi BOUSSANDEL Faculte des Sciences de Gabes 6072 Zrig Gabes Citd Riadh Tunisia-laboratoire EDP et applications LR03ES04 Tunisia

This paper deals with an abstract periodic gradient system in which the gradient is taken with respect to a variable metric. We obtain an existence and uniqueness result via the application of a global inverse theorem.

关键词： existence and uniqueness periodic solutions gradient systems global inversetheorem

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Laeng-Morpurgo-Type Uncertainty Inequalities for the Laguerre Transform

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Journal of Mathematical Research with applications 2022年第1期42卷 8-14页

作者： Fethi SOLTANI Faculté des Sciences de Tunis Laboratoire d’Analyse Mathématique et Applications LR11ES11Université de Tunis El Manar Ecole Nationale d’Ingénieurs de Carthage Université de Carthage

In this work,we prove Clarkson-type and Nash-type inequalities for the Laguerre transform■ on M=[0,∞)×*** combining these inequalities,we show Laeng-Morpurgo-type uncertainty *** establish also a local-type uncertainty inequalities for the Laguerre transform ■,and we deduce a Heisenberg-Pauli-Weyl-type inequality for this transform.

关键词： Laeng-Morpurgo-type inequality local-type inequality Heisenberg-Pauli-Weyl-type inequality

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The calculation of band gap energy in zinc oxide films

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Journal of Semiconductors 2015年第1期36卷 17-22页

作者： Ali Arif Okba Belahssen Salim Gareh Said Benramache Electrical Engineering department Faculty of Technology University of Biskra Algeria laboratoire de Physique des Couches Minces et applications (LPCMA) Université de Biskra Algeria Mechanical Engineering department Faculty of Technology University of Biskra Algeria

We investigated the optical properties of undoped zinc oxide thin films as the n-type semiconductor;the thin films were deposited at different precursor molarities by ultrasonic spray and spray pyrolysis *** thin films were deposited at different substrate temperatures ranging between 200 and 500℃. In this paper, we present a new approach to control the optical gap energy of ZnO thin films by concentration of the ZnO solution and substrate temperatures from experimental data, which were published in international journals. The model proposed to calculate the band gap energy with the Urbach energy was investigated. The relation between the experimental data and theoretical calculation suggests that the band gap energies are predominantly estimated by the Urbach energies, film transparency, and concentration of the ZnO solution and substrate temperatures. The measurements by these proposal models are in qualitative agreements with the experimental data; the correlation coefficient values were varied in the range 0.96–0.99999, indicating high quality representation of data based on Equation（2）, so that the relative errors of all calculation are smaller than 4%. Thus, one can suppose that the undoped ZnO thin films are chemically purer and have many fewer defects and less disorder owing to an almost complete chemical decomposition and contained higher optical band gap energy.

关键词： ZnO thin films semiconductor band gap energy correlation

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applications and grants of the National Natural Science Foundation of China's General Program and Young Scientists Fund in immunology research:a 10-year review(2013–2022)

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Science China(Life Sciences) 2024年第6期67卷 1321-1324页

作者： Baoman Li Yanyan Tian Puyue Wang department of Life Sciences National Natural Science Foundation of ChinaBeijing 100085China

Immunology,a biomedical discipline with an ancient history of maintaining thriving research vitality to date,refers to the study of the structure and function of the immune system of the body,the pathogenesis of immune-related diseases,immunological diagnoses,and prevention mechanisms(National Natural Science Foundation of China,2023).Immunological research is the foundation of research in biology,as well as basic and clinical medicine(Kubli et al.,2021).

关键词： prevention Foundation Natural

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The impact of age structure and vaccine prioritization on COVID-19 in West Africa

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Infectious Disease Modelling 2022年第4期7卷 709-727页

作者： Hemaho B.Taboe Michael Asare-Baah Afsana Yesmin Calistus N.Ngonghala department of mathematics University of FloridaGainesvilleFL32611USA laboratoire de Biomathematiques et d’Estimations Forestieres University of Abomey-CalaviCotonouBenin department of Epidemiology University of Florida2004 Mowry RoadGainesvilleFL32610USA Emerging Pathogens Institute University of FloridaGainesvilleFL32610USA

The ongoing COVID-19 pandemic has been a major global health challenge since its emergence in *** to early predictions that sub-Saharan Africa(SSA)would bear a disproportionate share of the burden of COVID-19 due to the region's vulnerability to other infectious diseases,weak healthcare systems,and socioeconomic conditions,the pandemic's effects in SSA have been very mild in comparison to other ***,the number of cases,hospitalizations,and disease-induced deaths in SSA remain low,despite the loose implementation of non-pharmaceutical interventions(NPIs)and the low availability and administration of *** explanations for this low burden include epidemiological disparities,under-reporting(due to limited testing),climatic factors,population structure,and government policy *** this study,we formulate a model framework consisting of a basic model(in which only susceptible individuals are vaccinated),a vaccine-structured model,and a hybrid vaccine-age-structured model to assess the dynamics of COVID-19 in West Africa(WA).The framework is trained with a portion of the confirmed daily COVID-19 case data for 16 West African countries,validated with the remaining portion of the data,and used to(i)assess the effect of age structure on the incidence of COVID-19 in WA,(ii)evaluate the impact of vaccination and vaccine prioritization based on age brackets on the burden of COVID-19 in the sub-region,and(iii)explore plausible reasons for the low burden of COVID-19 in WA compared to other parts of the *** of the model parameters and global sensitivity analysis show that asymptomatic youths are the primary drivers of the pandemic in ***,the basic and control reproduction numbers of the hybrid vaccine-age-structured model are smaller than those of the other two models indicating that the disease burden is overestimated in the models which do not account for *** result is confirmed through the vaccine-d

关键词： Vaccine prioritization SARS-CoV-2 Omicron variant AVAT Reproduction number Herd immunity

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