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Design multifunctional Mg–Zr coatings regulating Mg alloy bioabsorption

Journal of Magnesium and Alloys 2024年第4期12卷 1461-1478页

作者： Zohra Benzarti Sandesh Itani josédavid castro Sandra Carvalho Ana Sofia Ramos University of Coimbra CEMMPREARISEDepartment of Mechanical EngineeringRua Luís Reis Santos3030-788CoimbraPortugal Laboratory of Multifunctional Materials and Applications(LaMMA) Department of PhysicsFaculty of Sciences of SfaxUniversity of SfaxSoukra Road km 3.5B.P.1171Sfax3000Tunisia

Magnesium(Mg)alloys are widely used for temporary bone implants due to their favorable biodegradability,cytocompatibility,hemocompatibility,and close mechanical properties to ***,rapid degradation and inadequate strength limit their *** overcome this,the direct current magnetron sputtering technique is employed for surface coating in Mg-based alloys using various zirconium(Zr)*** approach presents a promising strategy for simultaneously improving corrosion resistance,maintaining biocompatibility,and enhancing strength without compromising *** leveraging Mg’s inherent biodegradability,it has the potential to minimize the need for secondary surgeries,thereby reducing costs and *** paper is a systematic study aimed at understanding the corrosion mechanisms of Mg–Zr coatings,denoted Mg-xZr(x=0–5 at.%).Zr-doped coatings exhibited columnar growth leading to denser and refined structures with increasing Zr *** analysis confirmed the presence of the Mg(00.2)basal plane,shifting towards higher angles(1.15°)with 5 at.%Zr doping due to lattice parameter changes(i.e.,decrease and increase of“c”and“a”lattice parameters,respectively).Mg–Zr coatings exhibited“liquidphilic”behavior,while Young’s modulus retained a steady value around 80 GPa across all ***,the hardness has significantly improved across all samples’coating,reaching the highest value of(2.2±0.3)GPa for 5 at.%*** testing in simulated body fluid(SBF)at 37℃ revealed a significant enhancement in corrosion resistance for Mg–Zr coatings containing 1.0–3.4 at.%*** with the 5 at.%Zr coating which exhibited a corrosion rate of 32 mm/year,these coatings displayed lower corrosion rates,ranging from 1 to 12 mm/*** synergistic enhancement in mechanical properties and corrosion resistance,achieved with 2.0–3.4 at.%Zr,suggests potential ability for reducing stress shielding and controlled degradation performance,and consequentl

关键词： Mg-Zr coatings Magnetron sputtering Nanoindentation Corrosion resistance Bone implants

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Lifestyles of Older Adults in Castilla-La Mancha(Spain):Influence of Sex,Age,and Habitat

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Fudan Journal of the Humanities and Social Sciences 2024年第2期17卷 313-335页

作者： Esther Portal Martínez Juan Lirio castro david Alonso González joséLuis Gómez Ramos University of Castilla-La Mancha Talavera de la ReinaSpain Complutense University MadridSpain

This paper presents the quantitative research results of a comprehensive study titled“Current Profle of Older Adults in Castilla-La Mancha(Spain).”The study aims to understand and describe the characteristics of individuals aged 65 and above within this autonomous region,with a focus on the variables of sex,age,and habitat.A cross-sectional approach was employed,utilizing quantitative methods to collect *** gather information,a customized questionnaire was developed to address the study objectives,covering various aspects such as sociodemographic factors,living conditions,leisure activities,social participation,and cultural *** survey was conducted via telephone,ensuring representation by employing gender quotas,age-group stratifcation,and considerations for habitat size.A representative sample of 1,065 participants was included in the *** fndings reveal a degree of homogeneity in the lifestyles of older adults,with discernible variations infuenced by factors such as sex,habitat,and *** results shed light on the diverse habits and experiences of older adults,emphasizing the signifcance of habitat conditions,social participation,and the aging process.

关键词： Lifestyle habits Older adults Habitat conditions Social participation Aging experience

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Historical relationships of the Mesoamerican highlands,with emphasis on tropical montane cloud forests:a temporal cladistic biogeographical analysis

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Journal of Mountain Science 2023年第1期20卷 129-140页

作者： castro-TORREBLANCA Marisol ESPINOSA david BUENO-HERNANDEZ Alfredo LUNA-VEGA Isolda Biological Sciences Graduate Program Coordination of Graduate StudiesNational Autonomous University of MexicoUniversity CityCoyoacán04510Mexico CityMexico Comparative Biology and Biodiversity Research Unit Facultad de Estudios Superiores ZaragozaNational Autonomous University of MexicoAv.Batalla del 5 de mayo s/nCol.Ejército de Oriente09230Mexico CityMexico Laboratory of Biogeography and Systematics Department of Evolutionary BiologyFaculty of SciencesNational Autonomous University of MexicoUniversity CityCoyoacán04510Mexico CityMexico

The historical relationships of nine areas of endemism of the tropical montane cloud forests(TMCFs)were analysed based on a temporal cladistic biogeographical *** cladistic biogeographical analyses were conducted based on 29cladograms of terrestrial taxa by partitioning them into three time-slices,namely,Miocene,Pliocene,and *** results showed different area relationships over *** the Miocene and Pliocene time slices,the Isthmus of Tehuantepec acted as a geographic barrier that fragmented the TMCFs into two portions:west of the Isthmus and east of the *** the case of the Pleistocene,the TMCFs were broken into two portions,one related to the Neotropical region and the other to the Nearctic ***,the analyses allowed us to detect the influences of different geological and paleoclimatological events on the distribution of the TMCFs over ***,the TMCFs current distribution might have been driven by geological events during the Miocene-Pliocene,whereas climatic fluctuations have the highest impact during the Pleistocene.

关键词： Dispersal Evolutionary biogeography Paralogy free subtree analysis Vicariance

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Distributed Monitoring of Power System Oscillations Using Multiblock Principal Component Analysis and Higher-order Singular Value Decomposition

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Journal of Modern Power Systems and Clean Energy 2022年第4期10卷 818-828页

作者： Arturo Román-Messina Alejandro Castillo-Tapia david A.Román-García Marcos A.Hernández-Ortega Carlos A.Morales-Rergis Claudia M.castro-Arvizu Center for Research and Advanced Studies(CINVESTAV)of the National Polytechnic Institute of Mexico GuadalajaraJal.45017Mexico Instituto Tecnológico y de Estudios Superiores de Monterrey GuadalajaraJal.45070Mexico Autonomous University of Guadalajara GuadalajaraJal.45129Mexico Centro de Enseñanza Técnica Industrial and he is also with UAGGuadalajaraJal.44638Mexico

The primary goal in the analysis of hierarchical distributed monitoring and control architectures is to study the spatiotemporal patterns of the interactions between areas or *** this paper,a novel conceptual framework for distributed monitoring of power system oscillations using multiblock principal component analysis(MB-PCA)and higher-order singular value decomposition(HOSVD)is proposed to understand,characterize,and visualize the global behavior of the power *** proposed framework can be used to evaluate the influence of a given area or utility on the oscillatory behavior,uncover low-dimensional structures from high-dimensional data,and analyze the effects of heterogeneous data on the modal characteristics and interpretation of power *** metrics are then investigated to examine the relationships between the dynamic patterns and participation of individual data blocks in the global behavior of the *** application of these techniques is demonstrated by case studies of two systems:a 14-machine test system and a 5449-bus 635-generator equivalent model of a large power system.

关键词： Distributed monitoring multiblock principal component analysis(MB-PCA) higher-order singular value decomposition(HOSVD) Tucker decomposition

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Journal of Sport and Health Science 2021年第4期10卷 447-453页

作者： Kate Parker Anna Timperio Jo Salmon Karen Villanueva Helen Brown Irene Esteban-Cornejo Veronica Cabanas-Sánchez josé castro-Pinero david Sánchez-Oliva OscarL.Veiga School of Exercise and Nutrition Sciences Institute for Physical Activity and Nutrition(IPAN)Deakin UniversityGeelongVIC 3220Australia Centre for Urban Research School of Global Urban and Social StudiesRMIT UniversityMelbourneVIC 3000Australia Center for Cognitive and Brain Health Department of PsychologyNortheastern UniversityBostonMA 02115USA PROmoting FITness and Health through physical activity(PROFITH)research group Department of Physical Education and SportsFaculty of Sport SciencesUniversity of GranadaGranada 18010Spain Department of Physical Education Sports and Human MovementAutonomous University of MadridMadrid 28049Spain Research Centre in Physical Activity Health and Leisure(CIAFEL)Faculty of SportUniversity of PortoPorto 4099-002Portugal Department of Physical Education Faculty of Education SciencesUniversity of CadizPuerto Real 11003Spain Biomedical Research and Innovation Institute of Cadiz(INiBICA) Cadiz 11003Spain

Background:Children and adolescents can be distinguished by different typologies(clusters) of physical activity and sedentary *** physical activity and sedentary behaviors change over time within different typologies is not *** study examined longitudinal changes in physical activity and sedentary time among children and adolescents with different baseline typologies of activity-related ***:In this longitudinal study(3 annual time points) of children(n=600,age=9.2±0.4 years(mean±SD),50.3% girls) and adolescents(n=1037,age=13.6±1.7 years,48.4% girls),participants were recruited in Spain in *** class analyses identified typologies based on self-reported screen,educational,social and relaxing sedentary behaviors,active travel,muscle strengthening activity,and sport at *** each typology,linear mixed growth models explored longitudinal changes in accelerometer-derived moderate-to-vigorous physical activity and sedentary time,as well as time by class ***:Three typologies were identified among children( "social screenies",12.8%;"exercisers",61.5%;and "non-sporty active commuters",25.7%) and among adolescents "active screenies",43.5%;"active academics",35.0%;and "non-sporty active commuters",21.5%) at *** time increased within each typology among children and adolescents,with no significant differences between *** changes in physical activity were found in any typology among *** adolescents,physical activity declined within all typologies,with "non-sporty active commuters" declining significantly more than "active screenies" over 3 ***:These results support the need for interveation to promote physical activity and prevent increases in sedentary time during childhood and *** characterized as "non-sporty active commuters" may require specific interventions to maintain their physical activity over time.

关键词： Behavior change Physical activity Sedentary behavior Typologies Youth

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Physical and chemical characterization of sediments from an Andean river exposed to mining and agricultural activities: The Moquegua River, Peru

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International Journal of Sediment Research 2022年第6期37卷 780-793页

作者： Luis de Los Santos Valladares Juan Luis Ccamapaza Renato Arturo Valencia-Bedregal Luis Enrique Borja-castro jose Velazquez-Garcia Dehiwalage Harshani Nimalika Perera Adrian Ionescu david Arvidsson Eustace Peregrine Barnes Peter Newton Hugo Lepage Patrick Byrne Angel Guillermo Bustamante Dominguez Crispin H.W.Barnes Cavendish Laboratory Department of Physics University of Cambridge Escuela Acad emico Profesional de Ingeniería Ambiental Universidad Nacional de Moquegua Provincia de Mariscal Nieto Laboratorio de Cer amicos y Nanomateriales Facultad de Ciencias Físicas Universidad Nacional Mayor de San Marcos School of Biological and Environmental Science Liverpool John Moores University

This study presents an analysis of sediments in an Andean river impacted by both natural conditions and anthropogenic activities. Fifty samples were collected from selected sites throughout the Moquegua River drainage basin, and Tambo River headwaters at Pasto Grande, in Peru, and analysed with X-ray diffraction, energy dispersive X-ray spectroscopy, scanning electron microscopy, Fourier-transform infrared spectroscopy and thermogravimetric analysis. Si, Ca, Al, Fe, and O, common constituents of soils, were dominant, along with K, N, and P. The latter originating as primary macronutrients or chemical residuals from fertilizers used in agriculture. Higher concentrations of macronutrients and organic components were found in agricultural and urban areas, respectively. Arsenic minerals were also detected, which occur naturally, but possibly at levels augmented by anthropogenic activity. The application of cluster analysis revealed clustering between arsenic, arsenolite, and potassium but no significant geospatial correlation between sample sites in the drainage basin.

关键词： Andean river Moquegua river Sediments Fourier-transform infrared spectroscopy TG-DTG/DTA Clustering analysis

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Occurrence and ecological risk assessment of pharmaceutical products in the Kadicha river in Lebanon

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Emerging Contaminants 2021年第1期7卷 196-203页

作者： Fatme Merhabi Elena Gomez Nancy Ariza castro Helmieh Amine david Rosain Jalal Halwani Helene Fenet Hydrosciences Montpellier IRDCNRSUniversity of MontpellierMontpellierFrance Water&Environment Science Laboratory Faculty of Public Health(FSP III)Lebanese UniversityTripoli1300Lebanon Escuela de Química Instituto Tecnologico de Costa RicaCartago 159-7050Costa Rica

Contamination of aquatic systems with pharmaceutical products represents a rising *** Kadicha river in Northern Lebanon is an illustrative example of a small Mediterranean river affected by rapid urbanization and population *** paper reports the first study on occurrence and ecological risk assessments on selected pharmaceuticals and their metabolites within the Kadicha *** this purpose,surface water samples were collected over two sampling campaigns from twelve sites impacted by urban,rural,and mixed land uses(residential and agricultural zones)within the Kadicha river *** the studied pharmaceuticals,six compounds(carbamazepine,diclofenac,acetaminophen,sulfamethoxazole,ofloxacin,and atenolol)were detected with detection frequencies and concentrations that vary according to the sampling *** was the most frequently detected compound and showed the highest concentrations(not detected-290 ng/L).The presence of pharmaceuticals carbamazepine,ofloxacin(not detected-190 ng/L),and atenolol(not detected-93 ng/L)was related to raw wastewater inputs in the water body,while the presence of sulfamethoxazole(not detected-23 ng/L)was associated with its usage in specific sites with livestock ***,the presence of acetaminophen(not detected-242 ng/L)and diclofenac(not detected-1055 ng/L)can be affected by their degradation properties in river *** highest concentrations were observed in the urbanized downstream area,while the lowest concentrations were within the rural upstream ***,the urbanized downstream area presents the highest potential risks for aquatic ***,ofloxacin may pose high ecotoxicological risks in this *** levels of contamination with pharmaceuticals do not exceed the concentrations reported in the ***,the levels of carbamazepine,diclofenac,and acetaminophen were more similar to sites receiving raw wastewaters,while the concentration levels of sulfamethoxazo

关键词： Kadicha river Pharmaceuticals Surface waters Wastewaters Potential risk Urbanization

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The cardiovascular aspects of a Ménière’s disease population——A pilot study

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Journal of Otology 2019年第2期14卷 51-56页

作者： Angela Reis Rego david Dias Ana Pinto SANDra Sousa e castro Telma Feliciano Cecília Almeida e Sousa ENT Department Centro Hospitalar e Universitário do Porto Largo do Prof.Abel Salazar

Introduction:MD is considered a rare *** adequate model that explains MD's pathophysiology is not well ***,the vascular theory of the disease has been ***:To characterize a MD population according to its cardiovascular risk and correlate it to the MD clinical ***:In this retrospective chart study the data of 31 MD patients observed between January 2017 and April 2018 in a tertiary university hospital were *** included in the study were diagnosed according to the Barany Society *** follow-ups,patients with autoimmune disease,atopy or allergy,major psychiatric disease and migraine were ***,gender,cardiovascular risk factors,audiometric and vestibular parameters,occurrence of MD attacks in the previous 6 months,vestibular medication in course and time course of MD were recorded and compared between groups(with and without cardiovascular risk factors).Results:31 patients(61.3%females)mean aged 60.3 years(±9.7)were studied.74%of the population had at least one risk factor and 51.6%of patients had attacks in the last 6 *** was a statistically significant difference in the occurrence of MD attacks in the last 6 months(p=0.014)between MD patients with and without risk *** PTA thresholds were higher and speech discrimination was lower in individuals with more cardiovascular risk ***:Treatment of MD focusing on vascular risk factors may allow a better control of symptoms and result in a decreased need for ablative procedures in this disorder.

关键词： Meniere disease Cardiovascular disease Hypertension Prognosis

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Self-assembly of highly ordered DNA origami lattices at solid-liquid interfaces by controlling cation binding and exchange

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Nano Research 2020年第11期13卷 3142-3150页

作者： Yang Xin Salvador Martinez Rivadeneira Guido Grundmeier Mario castro Adrian Keller Technical and Macromolecular Chemistry Paderborn UniversityPaderborn33098Germany Grupo Interdisciplinar de Sistemas Complejos and Instituto de Investigación Tecnológica Universidad Pontificia Comillas de MadridMadrid28015Spain

The surface-assisted hierarchical self-assembly of DNA origami lattices represents a versatile and straightforward method for the organization of functional nanoscale objects such as proteins and ***,we demonstrate that controlling the binding and exchange of different monovalent and divalent cation species at the DNA-mica interface enables the self-assembly of highly ordered DNA origami lattices on mica *** development of lattice quality and order is quantified by a detailed topological analysis of high-speed atomic force microscopy(HS-AFM)*** find that lattice formation and quality strongly depend on the monovalent cation ***^(+)is more effective than Li^(+)and K^(+)in facilitating the assembly of high-quality DNA origami lattices,because it is replacing the divalent cations at their binding sites in the DNA backbone more *** regard to divalent cations,Ca^(2+)can be displaced more easily from the backbone phosphates than Mg^(2+)and is thus superior in guiding lattice *** independently adjusting incubation time,DNA origami concentration,and cation species,we thus obtain a highly ordered DNA origami lattice with an unprecedented normalized correlation length of *** the correlation length,we use computer vision algorithms to compute the time course of different topological observables that,overall,demonstrate that replacing MgCl_(2) by CaCl_(2) enables the synthesis of DNA origami lattices with drastically increased lattice order.

关键词： DNA origami self-assembly lattice formation high-speed atomic force microscopy topological analysis

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Three-Dimensional Conformal and Intensity Modulated Dynamic Radiotherapy in Juvenile Nasopharyngeal Angiofibroma

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International Journal of Otolaryngology and Head & Neck Surgery 2023年第4期12卷 269-278页

作者： María Fátima Chilaca Rosas david Rafael Salazar Calderon Manuel Tadeo Contreras Aguilar Carlos Eduardo Barrios Merino Melissa García Lezama Benjamín Conde castro Shelley Astrid Martínez Torres Katia Hernández Salgado Rafael Medrano Guzmán Radiotherapy Department Oncology Hospital of National Medical Center s. XII Mexican Social Security Institute Mexico City Mexico Directorate of Research General Hospital of Mexico “Dr. Eduardo Liceaga” Mexico City Mexico Research Department in Imaging “Salud Digna” Mexico City Mexico Directorate Oncology Hospital of National Medical Center s. XII Mexican Social Security Institute Mexico City Mexico

Objective: Juvenile Nasopharyngeal Angiofibroma (JNA) is a benign neoplasm with a high vascularity component, greater craniofacial involvement in adolescent patients, and aggressive local behaviour. In unresectable patients, radiotherapy is a therapeutic option for local control. Our aim in this study was to analyze the clinical benefit and local control provided by two modalities of radiotherapy: the Three-Dimensional Conformal (3DC) technique and volumetric modulated arc therapy (VMAT), applied to pediatric patients with JNA considered unresectable and non-recurrent. Methods: In retrospective study, the information was recorded from pediatric patients with a diagnosis of non-recurrent and unresectable JNA treated with radiotherapy at the Oncology Hospital of the National Medical Center SXXI of Mexico City, from March 2010 to March 2021. Radiotherapy management and its association with clinical outcomes of tumour control, and symptoms were assessed. In addition, an evaluation of acute and chronic toxicity was performed. Results: It was found that the median age was 14 years. 9 patients (37.5%) underwent 3DC and 15 (62.5%) VMAT. In terms of local control, and progression-free survival, we did not find significant difference between radiotherapy modalities (p ≤ 0.57). Acute toxicity for both modalities presented statistical differences for radio epithelitis (p = 0.03). Only Grade I and II radiation-induced acute toxicity was observed. Regarding chronic toxicity, statistical significance was observed for craniofacial hypoplasia, in relation to its absence in the VMAT group (p = 0.001). Conclusion: The VMAT presents improvements in dosimetry parameters that improve patient toxicity. In both techniques adequate tumour control was observed, however, the rarity of the disease is a limitation to establish the most appropriate therapeutic technique.

关键词： Intensity-Modulated Radiotherapy Nasopharyngeal Angiofibroma Pediatric Radiotherapy Toxicity

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