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Navigating medial patellotibial ligament reconstruction:clinical perspectives and surgical strategies

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World Journal of clinical cases 2025年第1期13卷 6-10页

作者： Juan Pablo Zicaro Ignacio garcia-Mansilla Division of Knee Hospital Italiano de Buenos AiresBuenos Aires 1109Argentina

The surgical approach for patellar instability usually refers to reconstruction of the medial patellofemoral ligament associated with an osteotomy of the tibial tuberosity or a trochleoplasty when *** medial patellotibial ligament and the medial patellomeniscal ligament are secondary stabilizers of the *** this,both the medial patellotibial and patellofemoral ligaments aid in patellar rotation and tilt when the knee is flexed beyond 45°.The medial patellotibial ligament plays a particularly important role in the final stages of stretching in extension and between 40 degrees to 90 degrees of *** clinical relevance and surgical indications for medial patellotibial ligament reconstruction associated with medial patellofemoral ligament reconstruction are still *** editorial explores the surgical indications and clinical results for medial patellotibial ligament reconstruction to improve readers’understanding of this technique,especially because reported clinical outcomes have remained sparse.

关键词： Medial patellotibial ligament Patellar instability reconstruction Surgical

challenges and improvement strategies in the hospitalization of chronic multimorbid patients

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World Journal of clinical cases 2025年第3期13卷 35-41页

作者： Andres Fontalba-Navas Francisco Pozo Muñoz rogelio garcia cisneros Maria Jose garcia Larrosa Maria del Mar callejon Gil Ignacio garcia Delgado Maria Belen Jimenez Martinez Antequera Hospital Northern Málaga Integrated Healthcare AreaAntequera 29200AndalusiaSpain Department of Public Health and Psychiatry University of MálagaMálaga 29010Spain Antequera Hospital Northern Málaga Antequera Integrated Healthcare AreaAntequera 29200MálagaSpain

BAcKGrOUND Addressing the growing challenge of hospitalizing chronic multimorbid patients,this study examines the strain these conditions impose on healthcare systems at a local level,focusing on a pilot *** diseases and complex patients require comprehensive management strategies to reduce healthcare burdens and improve patient *** proven effective,this pilot model has the potential to be replicated in other healthcare settings to enhance the management of chronic multimorbid *** To evaluate the effectiveness of the high complexity unit(HcU)in managing chronic multimorbid patients through a multidisciplinary care model and to compare it with standard hospital *** The study employed a descriptive longitudinal approach,analyzing data from the Basic Minimum Data Set(BMDS)to compare hospitalization variables among the HcU,the Internal Medicine Service,and other services at Antequera Hospital throughout *** HcU,designed for patients with complex chronic conditions,integrates a patient-centered model emphasizing multidisciplinary care and continuity *** The study employed a descriptive longitudinal approach,analyzing data from the BMDS to compare hospitalization variables among the HcU,the Internal Medicine Service,and other services at Antequera Hospital throughout *** HcU,designed for patients with complex chronic conditions,integrates a patient-centered model emphasizing multidisciplinary care and continuity *** This study demonstrates the effectiveness of the HcU in managing patients with complex chronic diseases through a multidisciplinary *** coordinated care provided by the HcU results in improved patient outcomes,reduced unnecessary hospitalizations,and better management of patient *** superiority of the HcU compared to standard care is evident in key outcomes such as fewer readmissions and higher patient satisfaction,reinforcing its value as a model of ca

关键词： High complexity unit chronic multimorbidity Patient-centered care Integrated care Healthcare management

corrosion behavior of hypoeutectic Al-cu alloys in H_2SO_4 and Nacl solutions

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Acta Metallurgica Sinica(English Letters) 2009年第4期22卷 241-246页

作者： Wislei r.Osório Leandro c.Peixoto Leonardo r.garcia Amauri garcia Department of Materials Engineering University of Campinas-UNICAMP

The aim of this work was to evaluate the electrochemical behaviour of hypoeutectic Al-cu alloys immersed in two different solutions containing sulphate and chloride ions, respectively. The influence of Al2cu associated to the dendritic arm spacing on the general corrosion resistance of such alloys is analysed. The typical microstructural pattern was examined by using scanning electron microscope. The corrosion tests were performed in both 0.5 M sulphuric acid and 0.5 M Nacl solutions at 25℃ by using an electrochemical impedance spectroscopy （EIS） technique and potentiodynamic polarization curves. Equivalent circuits by using the ZView software, were also used to provide quantitative support for the discussions. It was found that as the cu content increased （i.e., increasing the Al2cu fraction）, a higher susceptibility to the corrosion action in the Nacl solution is detected. In contrast, the tests carried out in the H2SO4 solution resulted in similar corrosion,rates for the three different hypoeutectic alloys.

关键词： Al-cu alloys Al2cu corrosion Microstructure castings

Status and prospects for symmetric organic redox flow batteries

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Journal of Energy chemistry 2025年第1期100卷 125-143页

作者： Md Al raihan c.Adam Dyker Department of chemistry University of New Brunswick

As environmental concerns from fossil fuel consumption intensify, large-scale energy storage becomes imperative for the integration of renewable sources like wind, hydro, and solar with the electrical *** flow batteries, particularly those employing organic molecules, are positioned as a key technology for this purpose. This review explores the growing field of symmetric organic redox flow batteries(OrFBs) within this context. Unlike traditional asymmetric designs based on unique active materials for each electrode, symmetric OrFBs involve a single bipolar species for both electrodes. This review highlights the benefits of a symmetric design, and categorizes five distinct classes of organic bipolar molecules used in both aqueous and non-aqueous solvents. By providing a comprehensive overview of their cell cycling and performance characteristics, the strengths and weaknesses of the diverse categories of bipolar molecules are highlighted for both solvent systems, as are opportunities for future development. This should guide new research directions and advance the development of practical symmetric OrFBs.

关键词： redox flow battery Symmetric battery Organic battery Aqueous electrolyte Non-aqueous electrolyte

Machine Learning Techniques in Predicting Hot Deformation Behavior of Metallic Materials

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computer Modeling in Engineering & Sciences 2025年第1期142卷 713-732页

作者： Petr Opela Josef Walek Jaromír Kopecek Department of Metallurgical Technologies Faculty of Materials Science and TechnologyVSB–Technical University of OstravaOstrava70800Czech Republic FZU—Institute of Physics of the czech Academy of Sciences Prague18200Czech Republic

In engineering practice,it is often necessary to determine functional relationships between dependent and independent *** relationships can be highly nonlinear,and classical regression approaches cannot always provide sufficiently reliable ***,Machine Learning(ML)techniques,which offer advanced regression tools to address complicated engineering issues,have been developed and widely *** study investigates the selected ML techniques to evaluate their suitability for application in the hot deformation behavior of metallic *** ML-based regression methods of Artificial Neural Networks(ANNs),Support Vector Machine(SVM),Decision Tree regression(DTr),and Gaussian Process regression(GPr)are applied to mathematically describe hot flow stress curve datasets acquired experimentally for a medium-carbon *** the GPr method has not been used for such a regression task before,the results showed that its performance is the most favorable and practically unrivaled;neither the ANN method nor the other studied ML techniques provide such precise results of the solved regression analysis.

关键词： Machine learning Gaussian process regression artificial neural networks support vector machine hot deformation behavior

Lipid droplets as metabolic determinants for stemness and chemoresistance in cancer

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World Journal of Stem cells 2021年第9期13卷 1307-1317页

作者： Alba royo-garcia Sarah courtois Beatriz Parejo-alonso Pilar Espiau-romera Patricia Sancho Hospital Universitario Miguel Servet IIS AragónZaragoza 50009Spain

Previously regarded as simple fat storage particles,new evidence suggests thatlipid droplets(LDs)are dynamic and functional organelles involved in keycellular processes such as membrane biosynthesis,lipid metabolism,cellsignalling and ***,an increased LD content is one of the mostapparent features resulting from lipid metabolism reprogramming necessary tosupport the basic functions of cancer *** have been associated to differentcellular processes involved in cancer progression and aggressiveness,such astumorigenicity,invasion and metastasis,as well as ***,all of these processes are controlled by a subpopulation of highly aggressivetumoral cells named cancer stem cells(cScs),suggesting that LDs may befundamental elements for stemness in *** the key role of cScs onchemoresistance and disease relapse,main factors of therapy failure,the design ofnovel therapeutic approaches targeting these cells may be the only chance forlong-term survival in cancer *** this sense,their biology and functionalproperties render LDs excellent candidates for target discovery and design ofcombined therapeutic *** this review,we summarise the currentknowledge identifying LDs and cScs as main contributors to cancer aggressiveness,metastasis and chemoresistance.

关键词： Lipids Lipid droplets Lipid metabolism Stemness cancer stem cells chemoresistance

A new strategy for corrosion protection of porous stainless steel using polypyrrole films

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Journal of Materials Science & Technology 2020年第2期37卷 85-95页

作者： c.garcia-cabezon c.garcia-Hernandez M.L.rodriguez-Mendez F.Martin-Pedrosa Materials Engineering E.I.I.Universidad de Valladolid47011 ValladolidSpain UVASENS E.I.I.Universidad de Valladolid47011 ValladolidSpain

In this work,a method to improve the protection against corrosion of porous sintered stainless steel is *** is based on the electrodeposition of polypyrrole(PPy)layers doped with a large size counterion such as dodecylbenzenesulphonic acid(DBSA),a conducting polymer with high corrosion resistance and good *** efficacy of PPy coating depends on the adequate adhesion between the metal substrate and the coating *** protection against corrosion has been tested using 316 L stainless steel(SS)powder sintered at different conditions to evaluate the effect of the sintering atmosphere(nitrogen and vacuum)and cooling rates(furnace and water)on corrosion resistance,while wrought 316 L SS has been used as reference *** addition,two electrochemical deposition techniques have been tested to select the most *** circuit potential evolution,anodic polarization measurements and electrochemical impedance spectra have been used to evaluate corrosion protection in phosphate buffer saline *** has been evidenced that a more homogeneous and stable coating was obtained in the case of porous stainless *** corrosion potential shifted to nobler values and the anodic polarization branch became more *** porous samples have a good passivation performance with a lower stable passive current density and a higher breakdown *** transfer electronic resistance and the impedance module increase more than one order of ***,the porosity of sintered stainless steel is seen as an advantage for the improvement of the adherence of the PPy *** best corrosion protection is found for samples sintered in nitrogen and water-cooled.

关键词： Stainless steel Powder metallurgy Protection corrosion Electrodeposited films Polymer coatings

Measurement and modelization of VLE of binary mixtures of propyl acetate,butyl acetate or isobutyl acetate with methanol at pressure of 0.6 MPa

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chinese Journal of chemical Engineering 2016年第5期24卷 630-637页

作者： P.Susial D.garcia r.Susial Y.c.clavijo A.Martin Escuela de lngenierias lndustriales y civiles Universidad de Los Palmos de Cran Canafia35017 Los Palmos de Gran CanariaCanary IslandsSpain Dept.lngenieria Qufmica y Tecnologia del Medio Ambiente Universidad de Valladolid.47071 ValladolidSpain

The vapor-liquid equilibrium of binary mixtures of propyl acetate, butyl acetate and isobutyl acetate with meth- anol has been determined at a constant pressure of 0.6 MPa. results have been modeled with the Peng-robinson equation, a traditional cubic equation of state widely employed in chemical industries, as well as with the perturbed-chain statistical associating fluid Pc-SAFT theory of Gross-Sadowski. By correlation of the binary inter- action parameters of these equations, the measured vapor-liquid equilibrium data can be accurately predicted. Thus, this work shows that these models are able to represent the experimental data for systems with associating comoounds via hydrogen bonding.

关键词： VLE isobaric data Propyl acetate Butyl acetate lsobutyl acetate MethanolEOS

Improvements in tribological and anticorrosion performance of porous Ti–6Al–4V via PEO coating

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Friction 2021年第5期9卷 1303-1318页

作者： c.garcia-cabezón M.L.rodríguez-Méndez V.AmigóBorrás r.Bayón c.Salvo-comino c.garcia-Hernandez F.Martin-Pedrosa Materials Engineering E.I.I.Universidad de ValladolidValladolid 47011Spain BioecoUVA research Institute Universidad de ValladolidValladolid 47011Spain Group UVASENS Escuela de Ingenierías IndustrialesUniversidad de ValladolidValladolid 47011Spain Instituto de Tecnología de Materials Univesitat Politécnica de ValenciaValencia 46022Spain Tribology Unit Fundación IK4-TeknikerEibar 20600Spain

Medical implants manufactured using biomaterial Ti–6Al–4V exhibit some *** higher elastic modulus than that of natural bone can cause stress shielding *** can be avoided using Ti–6Al–4V with pores in the implant ***,poor corrosion and tribocorrosion behaviors are yielded because of the large area exposed to the *** mitigate both issues,coating technologies can be *** plasma electrolytic oxidation(PEO)process is a cost‐effective process that has been used successfully in nonporous Ti *** this study,two PEO coatings with different amounts of ca/P are ***,reports regarding their application in porous materials are *** effects of PEO treatments on corrosion and tribocorrosion in Ti–6Al–4V powder metallurgy are analyzed *** porous materials provide an efficient surface for PEO coatings,as demonstrated via scanning electron microscopy(SEM)and atomic force microscopy(AFM),and the porosity of the substrates improved the adherence of the *** corrosion resistance measured via electrochemical impedance spectroscopy confirmed the beneficial effect of the coatings,particularly for long exposure *** lower roughness,small pore size,and more compact film observed in the PEO–ca/P sample resulted in favorable tribological and corrosion properties.

关键词： Ti‐based alloys corrosion tribocorrosion surface modification