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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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Female Sexual Function after Surgical Treatment of Urinary Incontinence

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Open Journal of Obstetrics and Gynecology 2018年第12期8卷 1210-1221页

作者： Eliane Goldberg Rabin Janete Vettorazzi Fernanda Santos Grossi Bruno Ribeiro Bossardi Bruno Florentino Goldani josé geraldo lopes ramos Postgraduation Program in Health Sciences: Gynecology and Obstetrics Universidade Federal do Rio Grande do Sul (UFRGS). Porto Alegre Brazil Nucleus of Studies and Research in Sexuality of Rio Grande do Sul (NEPESEX) CNPq Caxias do Sul Brazil Department of Gynecology and Obstetrics Faculty of Medicine (FAMED) UFRGS Porto Alegre Brazil FAMED UFRGS Porto Alegre Brazil Service of Obstetrics and Gynecology Hospital de Clínicas de Porto Alegre (HCPA) Porto Alegre Brazil

Introduction: Urinary incontinence is a common problem that can affect the quality of life of women of all ages and can negatively influence the exercise of sexuality. Aim: The aim of this study was to compare sexual function of women before and after surgical treatment for urinary incontinence. Method: The sample consisted of 38 women with urinary incontinence and surgical treatment (Burch or Sling procedure). The Female Sexual Function Index (FSFI) was used to evaluate sexual dysfunction before and after surgical treatment. Results: The mean age of the women in the study was 48 ± 8.8 years, and 58% were 50 years old or younger. By analyzing FSFI, it was observed that the majority of subjects had an overall index of sexual dysfunction (score < 26 points) before surgery. The desire and arousal domains improved significantly after surgery for all women included in the study. It was also observed that women with higher levels of education had more positive results related to desire. Conclusions: In our sample, in general, sexual function improved after surgical treatment of urinary incontinence, regardless of technique used, particularly in the discounter and pain domain. There was a substantial improvement of the sexual function among women who had presented with cystocele. Desire and arousal improved significantly after surgery, very likely due to the improvement of self-esteem after surgery.

关键词： Female Urinary Incontinence Sexual Dysfunction Urogynecology Surgical Procedures FSFI

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Maternal Effects of Immediate versus Delayed Umbilical Cord Clamping: A Randomized Clinical Trial

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Open Journal of Obstetrics and Gynecology 2021年第11期11卷 1500-1511页

作者： Gabriela Françoes Rostirolla Maria Alexandrina Zanatta Charles Francisco Ferreira josé geraldo lopes ramos Edimárlei Gonsales Valério Janete Vettorazzi Postgraduation Program in Health Sciences: Gynecology and Obstetrics (PPGGO) Faculdade de Medicina (FAMED) Universidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre Brasil Universidade de Caxias do Sul (UCS) Caxias do Sul Brasil Gynecology and Obstetrics Department Clinical Hospital of Porto Alegre (HCPA) Faculdade de Medicina (FAMED) Universidade Federal do Rio Grande do Sul Rio Grande do Sul (UFRGS) Porto Alegre Brasil

OBJECTIVE: To compare maternal preoperative and postoperative hemoglobin variation after cord clamping. METHODS: Randomized clinical trial performed in Porto Alegre, RS from January to December 2012. It was included 356 women with habitual risk gestations. In the immediate cord clamping group, the umbilical cord section was realized between 0 and 60 s (group 1) while in the delayed cord clamping group it was realized >60 s (group 2). RESULTS: The mean (±standard deviation [SD]) preoperative hemoglobin was 12.13 ± 1.06 in the group 1 and 12.13 ± 1.11 in the group 2. The mean (±SD) postoperative day 2 hemoglobin level was 10.19 ± 1.46 in the group 1 and 10.24 ± 1.42 in the group 2. CONCLUSIONS: Delayed umbilical cord clamping resulted in a similar maternal hemoglobin level reduction at postoperative day 2.

关键词： Cord Clamping Delayed Cord Clamping Immediate Cord Clamping Matern Hemoglobin Level

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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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Generalized Height-Diameter Models for Pinus montezumae Lamb. and Pinus pseudostrobus Lindl. Plantations in Michoacan, Mexico

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Open Journal of Forestry 2024年第3期14卷 214-232页

作者： Jonathan Hernández-ramos Valentín josé Reyes-Hernández Héctor Manuel De los Santos-Posadas Aurelio Manuel Fierros-González Enrique Buendía-Rodríguez Gerónimo Quiñonez-Barraza Instituto Nacional de Investigaciones Forestales Agrcolas y Pecuarias (INIFAP)-Campo Experimental Bajo Celaya Guanajuato Mxico Colegio de Postgraduados (COLPOS) Campus Montecillo Mxico INIFAP Campo Experimental Valle de Mxico Texcoco Mxico INIFAP Campo Experimental Valle del Guardiana Durango Mxico

Tree height (H) in a natural stand or forest plantation is a fundamental variable in management, and the use of mathematical expressions that estimate H as a function of diameter at breast height (d) or variables at the stand level is a valuable support tool in forest inventories. The objective was to fit and propose a generalized H-d model for Pinus montezumae and Pinus pseudostrobus established in forest plantations of Nuevo San Juan Parangaricutiro, Michoacan, Mexico. Using nonlinear least squares (NLS), 10 generalized H-d models were fitted to 883 and 1226 pairs of H-d data from Pinus montezumae and Pinus pseudostrobus, respectively. The best model was refitted with the maximum likelihood mixed effects model (MEM) approach by including the site as a classification variable and a known variance structure. The Wang and Tang equation was selected as the best model with NLS;the MEM with an additive effect on two of its parameters and an exponential variance function improved the fit statistics for Pinus montezumae and Pinus pseudostrobus, respectively. The model validation showed equality of means among the estimates for both species and an independent subsample. The calibration of the MEM at the plot level was efficient and might increase the applicability of these results. The inclusion of dominant height in the MEM approach helped to reduce bias in the estimates and also to better explain the variability among plots.

关键词： Random Covariate Random Effects Variance Structure Forest Inventories Forest Management Mixed Models

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Geochemistry and mineralogy of beach sediments in the northern Gulf of Mexico,Tamaulipas state,Mexico:implication for provenance

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Journal of Palaeogeography 2024年第3期13卷 375-400页

作者： Mayank Shukla Sanjeet K.Verma Mayla A.ramos-Vázquez John S.Armstrong-Altrin Karla R.Hernández-Martínez Sumit Mishra Vivek P.Malviya Héctor Hernández-Mendoza Posgrado de la Division de Geociencias Aplicadas Instituto Potosino de Investigacion Científica y Tecnologica(IPICYT)Camino a la Presa San José2055San Luis Potosí78216Mexico Division de Geociencias Aplicadas Instituto Potosino de Investigación Científica y Tecnologica(IPICYT)Camino a la Presa San Jose 2055San Luis Potosí78216Mexico Universidad Nacional Autonoma de México Instituto de Ciencias del Mar y LimnologíaUnidad de ProcesosOceanicos y CosterosCiudad UniversitariaCiudad de México 04510Mexico Department of Marine Sciences Bharathidasan UniversityTiruchirappalli620024Tamil NaduIndia Instituto de Geociencias Universidad Nacional Autonoma de MéxicoBoulevard Juriquilla 300176230JuriquillaQueretaroMexico Department of Applied Geology Dr.Harisingh Gour Central UniversitySagar470002Madhya PradeshIndia Instituto de Investigacion de Zonas Desérticas Universidad Autònoma de San Luis PotosíAltair 200CP 78377San LuisS.L.P.Mexico Universidad del Centro de Mexico Capitán Caldera 75CP 78250San LuisS.L.P.Mexico

Geochemical and mineralogical studies were performed in the La Pesca(LP)and Tesoro Altamira(TA)beach sediments,located in the Tamaulipas state,northern Gulf of *** main aim of this study is to infer the weathering history and provenance and to discriminate the tectonic environment of the beach *** sediments are composed of quartz with small amounts of accessory minerals such as plagioclase,calcite,orthoclase,microcline,and *** beach sediments are classified as fine-grained and very well sorted,however LP has coarse skewed and leptokurtic sediments,whereas TA has fine-skewed and very leptokurtic *** chemical index of weathering(CIW’)indicates intense weathering in the source *** quartz grain microtextures in the LP and TA are classified into mechanical,chemical,and mechanical/chemical *** features such as fractures,pits,percussion marks,abrasion fatigue,and V-shaped marks favor high-energy littoral,fluvial,subaqueous-marine,and aeolian *** chemical features indicate solution pits and crystalline overgrowth,which suggests a silica saturated marine *** mechanical/chemical features display adhering particles and elongated depressions suggest formation in a sub-aqueous nearshore marine *** and trace elements-based provenance discrimination diagrams indicate a felsic source derived from the Mesa Central(MC),Sierra Madre Oriental(SMOr)and Oaxaquia *** major and trace element concentrations imply a passive margin setting for the northern Gulf of Mexico,which is consistent with the general geology.

关键词： Beach sediments Geochemistry Mineralogy Provenance Tamaulipas Tectonic setting

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An Investigation into Forced Convection of a Nanofluid Flowing in a Rectangular Microchannel under the Influence of a Magnetic Field

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Fluid Dynamics & Materials Processing 2024年第2期20卷 311-323页

作者： Muataz S.Alhassan Ameer A.Alameri Andrés Alexis Ramírez-Coronel I.B.Sapaev Azher M.Abed David-Juan ramos-Huallpartupa Rahman S.Zabibah Division of Advanced Nanomaterial Technologies Scientific Research CenterAl-Ayen UniversityThi-QarIraq Department of Chemistry College of ScienceUniversity of BabylonBabylonIraq Research Group in Educational Statistics National University of EducatiosnAzoguesEcuador Department Physics and Chemistry Tashkent Institute of Irrigation and Agricultural Mechanization EngineersNational Research UniversityTashkentUzbekistan Akfa University TashkentUzbekistan New Uzbekistan University TashkentUzbekistan Department of Airconditioning and Refrigeration Engineering Al-Mustaqbal University CollegeHilla51001Iraq Academic Department of Agro-Industrial Engineering and Technology Universidad Nacional JoséMaría ArguedasApurimacPerú The Islamic University NajafIraq

In line with recent studies,where it has been shown that nanoﬂuids containing graphene have a stronger capacity to boost the heat transfer coefﬁcient with respect to ordinary nanoﬂuids,experiments have been conducted using water with cobalt ferrite/graphene *** particular,a circular channel made of copper subjected to a constant heatﬂux has been *** nanoparticles are sensitive to the presence of a magneticﬁeld,different conditions have been examined,allowing both the strength and the frequency of such aﬁeld to span relatively wide ranges and assuming different concentrations of *** to theﬁndings,the addition of nanoparticles to theﬂuid causes its rotation speed to increase by a factor of two,whereas ultraviolet radiation plays a negligible *** amount of time required to attain the maximum rotation speed of the nanoﬂuid and the Nusselt number have been measured under both constant and alternating magneticﬁelds for a ferroﬂuid with a concentration of 0.5%and atﬂow Reynolds number of 550 and 1750.

关键词： Nano fluid rectengular tube magnetic field

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Melatonin:a multitasking indoleamine to modulate hippocampal neurogenesis

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Neural Regeneration Research 2023年第3期18卷 503-505页

作者： Alejandro Romero joséÁngel Morales-García Eva ramos Department of Pharmacology and Toxicology Faculty of Veterinary MedicineComplutense University of Madrid Institute for Biomedical Research“A.Sols”(CSIC-UAM) Spanish Center for Networked Biomedical Research on Neurodegenerative Diseases(CIBERNED Department of Cellular Biology School of MedicineComplutense University of MadridMadridSpain

Neurodegeneration affects a large number of cell types including neurons,astrocytes or oligodendrocytes,and neural stem *** stem cells can generate new neuronal populations through proliferation,migration,and *** neurogenic potential may be a relevant factor to fight neurodegeneration and *** the last years,we can find growing evidence suggesting that melatonin may be a potential modulator of adult hippocampal *** lack of therapeutic strategies targeting neurogenesis led researchers to explore new *** preclinical studies with melatonin observed how melatonin can modulate and enhance molecular and signaling pathways involved in *** made a special focus on the connection between these modulation mechanisms and their implication in neurodegeneration,to summarize the current knowledge and highlight the therapeutic potential of melatonin.

关键词： adult hippocampal neurogenesis aging melatonin neural stem cell neurodegeneration neuroprotection signaling pathway therapeutic strategy

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Building geometry data from online maps for accurate thermal simulations of districts

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建筑模拟(英文) 2023年第9期16卷 1659-1674页

作者： Laura Romero Rodríguez joséSánchez ramos ServandoÁlvarez Domínguez Grupo Termotecnia.Departamento de Máquinas y Motores Térmicos University of CádizPuerto RealCádizSpain Grupo Termotecnia.Departamento de Ingenieria Energética University of SevilleSevilleSpain

Current approaches for simulating the energy performance of buildings on a large scale are limited by numerous assumptions and simplifications,which can lead to inaccurate *** new tools and procedures are emerging to improve accuracy,there remains a need for more user-friendly *** study proposes a new tool based on online maps to create the geometry of districts in a simple *** tool also enables an automatic evaluation of all buildings through dynamic hourly simulations,using a building simulation software and allowing to consider different weather *** illustrate the procedure,a district at risk of energy poverty in Seville(Spain)is modeled,where hourly temperature data for a whole year are available to demonstrate the need for building *** tool is used to evaluate the energy demands of the district under several retrofitting alternatives,and free-floating simulations are also performed to evaluate the improvement of thermal comfort without air-conditioning *** aim is not to discuss the actual values for this particular case,but rather to identify the correct direction for large-scale studies,so as to make them more easily ***,it may be concluded that the results provided by comprehensive tools,such as the one proposed in this study,enable easy yet accurate evaluations of buildings on a large scale with significant time savings,as well as the identification of locations where retrofitting interventions would have the greatest impact.

关键词： buildings districts energy demand efficiency GIS urban scale

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Antihypertensive drugs in pregnancy

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Family Medicine and Community Health 2013年第1期1卷 37-50页

作者： ROSE GASNIER EDIMARLEI GONSALES VALERIO josE geraldo lopes ramos Post Graduate Program in Medicine Universidade Federal do Rio Grande do SulHospital de Clinicas de Porto AlegreBrazil Service of Obstetrician and Gynecology Hospital de Clinicas de Porto AlegreBrazil Universidade Federal do Rio Grande do Sul Porto AlegreBrazil

Chronic hypertension complicates 3%-5% of pregnancies and gestational hypertension occurs in 6% of *** complicates 25% of the pregnancies with chronic hypertension,and approximately 15%-45% of the patients with gestational hypertension will develop preeclampsia,a dangerous condition that harms the maternal and fetal *** medication is used to treat severe hypertension to prevent serious maternal and fetal complications,but there is no consensus on when and how to treat mild-to-moderate hypertension in *** article reviews the usage,effect and safety of first,second and third line antihypertensive drugs for mild-to-moderate hypertension in pregnancy.

关键词： Gestational hypertension Mild-to-moderate hypertension Antihypertensive drugs

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