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HVOF-sprayed HAp/S53P4 BG composite coatings on an AZ31 alloy for potential applications in temporary implants

Journal of Magnesium and Alloys 2024年第1期12卷 345-360页

作者： Carlos A.Poblano-Salas John Henao Astrid L.Giraldo-Betancur Paola Forero-Sossa Diego German espinosa-Arbelaez Jorge A.González-Sánchez Luis R.Dzib-Pérez Susana T.estrada-Moo idelfonso e.pech-pech CIATeQ A.C. Av.Manantiales 23-AParque Industrial Bernardo QuintanaEl MarquésQuerétaro 76246Mexico CONAHCYT-CIATeQ A.C. Av.Manantiales 23-AParque Industrial Bernardo QuintanaEl MarquésQuerétaro 76246Mexico CONAHCYT-Cinvestav Libramiento Norponiente#2000.Fraccionamiento Real de JuriquillaQuerétaro 76230Mexico Universidad Tecnológica de Querétaro Av.Pie de la Cuesta N°2501Querétaro 76148Mexico CIDeSI Av.Playa Pie de la Cuesta No 702Col.San PabloQuerétaro 76125Mexico Center for Corrosion Research Autonomous University of CampecheAv.Héroe de Nacozari No.480P.C.24070San Francisco de CampecheCam.Mexico

Bioactive thermal spray coatings produced via high-velocity oxygen fuel spray(HVOF)from hydroxyapatite(HAp)and bioactive glasses(BG)have the potential to be employed on temporary implants due to the ability of both HAp and BG to dissolve and promote osseointegration,considering that both phases have different reaction and dissolution rates under in-vitro *** the present work,75%***-25%wt.S53P4 bioactive glass powders were HVOF-sprayed to obtain HAp/S53P4 BG composite coatings on a bioresorbable AZ31 *** study is focused on exploring the effect of the stand-off distance and fuel/oxygen ratio variation as HVOF parameters to obtain stable structural coatings and to establish their effect on the phases and microstructure produced in those *** characterization techniques,such as scanning electron microscopy,X-ray diffraction,and Fourier transform infrared spectroscopy,were employed to characterize relevant structural and microstructural properties of the composite *** results showed that thermal gradients during coating deposition must be managed to avoid delamination due to the high temperature achieved(max 550℃)and the differences in coefficients of thermal *** was also found that both spraying distance and oxygen/fuel ratio allowed to keep the hydroxyapatite as the main phase in the *** addition,in-vitro electrochemical studies were performed on the obtained HAp/S53P4 BG composite coatings and compared against the uncoated AZ31 *** results showed a significant decrease in hydrogen evolution(at least 98%)when the bioactive coating was applied on the Mg alloy during evaluation in simulated body fluid(SBF).

关键词： Coatings Composites Thermal spray Temporary implants Hydrogen evolution

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effect of brazing parameters on fillet size and microstructure of cladded fin-microchannel tube joints

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Transactions of Nonferrous Metals Society of China 2020年第12期30卷 3240-3253页

作者： J.C.GUÍA-TeLLO M.I.pech-CANUL e.TRUJILLO-VÁZQUeZ M.A.pech-CANUL centro de investigación en materiales avanzados(cimav) laboratorio nacional de nanotecnologíamiguel de cervantes no.120chihuahuachi8.31136méxico centro de investigación y de estudios avanzados del instituto politécnico nacional-unidad saltillo av.industria metalúrgica no.1062parque industrial saltillo-ramos arizperamos arizpecoahuila25900méxico conacyt-facultad de ciencias físico matemáticas benemérita universidad autónoma de pueblaav.san claudiocd universitariajardines de san manuelpueblapuebla72570méxico cinvestav-mérida km 6 ant.carr.a progresoap 73 cordemexméridayu3.97310méxico

This work concerns the optimization of furnace brazing conditions for joining micro-multiport aluminum tubes and fins made with AA4343/AA3003/AA4343 brazing sheet in mini-assemblies mimicking the core of an automotive heat *** method was used for design of experiment,considering five process parameters with two levels of *** aim was to maximize the fillet size of the brazed joints,which has an important influence on the thermal integrity and mechanical *** length measurements of brazed joints were performed with a metallographic *** statistical analysis allowed to obtain the optimum values of process parameters(peak temperature,residence time,heating rate,microchannel tube type and flux).At a 95%confidence level,the variability of fillet length is most significantly affected by the peak brazing temperature(77%),residence time(15%)and heating rate(7%).The predicted maximum fillet length was(152±11)μm,which was corroborated by confirmation *** microstructural analysis of tube−fin joints showed that variations in peak temperature and residence time affect only the size of the eutectic zone of fillet formed,but not the nature or composition of the constituent phases.

关键词： brazing cladded fin Taguchi method fillet size microstructure aluminum peak temperature optimization

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Clinical features of chronic kidney disease in dogs with the serological presence of Leptospira spp.,ehrlichia canis,and Anaplasma phagocytophilum

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Animal Diseases 2024年第3期4卷 224-230页

作者： Claire A.Vázquez‑Manzanilla María F.Cárdenas‑Marrufo eduardo Gutiérrez‑Blanco Matilde Jiménez‑Coello Nelly R.pech‑Sosa Antonio Ortega‑Pacheco Departamento de Salud Animal y Medicina Preventiva Facultad de Medicina Veterinaria y ZootecniaCampus de Ciencias Biológicas y AgropecuariasUniversidad Autónoma de YucatánMéridaYucatán 97100México Unidad Interinstitucional de Investigación Clínica y epidemiológica Facultad de MedicinaUniversidad Autónoma de YucatánMéridaYucatán 97000México

Chronic kidney disease is commonly diagnosed in dogs,and clinical signs may be aggravated when infected agents are *** this case report,33 dogs with chronic kidney disease were clinically evaluated and serologically tested for Leptospira spp.,ehrlichia canis,and Anaplasma *** seroprevalence for Leptospira *** 39.4%.The most frequent serovars found were Pyrogenes,Canicola,Bratislava and Australis,with serological titers between 1:100 to 1:*** signs included fever,depression,decreased body condition,vomiting and hema‑*** laboratory fndings were anemia,leukocytosis,thrombocytopenia,increased liver enzymes,urea and creatinine,hyperbilirubinemia and *** leptospira seronegative dogs were positive for one or both monitored homoparasites(i.e.,*** and ***);only three leptospira seropositive dogs were positive for one or both *** also suggest that endemic hemoparasites of dogs should be moni‑tored in dogs with a kidney condition for a better clinical picture of the patients and therapeutic approach.

关键词： Anaplasma Chronic kidney disease Dog ehrlichia Leptospira

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Study of an Ionic Fluid on the electrochemical Test of A36 Carbon Steel Ingot

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Journal of Materials Science and Chemical engineering 2022年第2期10卷 29-43页

作者： Socorro Valdez Rodriguez Martin Ignacio pech-Canul Hugo Rojas Oscar Sotelo Francisco Javier Rodríguez Araceli espinoza-Vazquez Ociel Rodríguez Instituto de Ciencias Físicas-UNAM Cuernavaca Morelos México Centro de investigación y de estudios Avanzadas del Instituto Politécnico Nacional Civestav-Saltillo Coahuila México Facultad de Ciencias Químicas e Ingeniería-UAeM Morelos México Departamento de Ingeniería Metalúrgica Facultad de Química-UNAM Ciudad de México México

An ionic fluid based on aromatic heterocyclic family constituted by 1,3-diazole groups was investigated. The purpose is to describe their electrochemical characteristics in order to identify the strategy to avoid the A36 carbon steel surface degradation by using electrochemical measurements. We found that the linear polarization resistance reveals an increasing value when the organic unsaturated cyclic ionic fluid was added to the corrosive electrolyte. The polarization curves and Tafel extrapolation obtained to know the slopes tafel and the inhibitor efficiency from current density (icorr) shows a high efficiency inhibition value.

关键词： A36-Steel Ionic Fluid electrochemical Degradation Tafel extrapolation Linear Polarization Resistance Diazole Group Organic Inhibitor

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SYNTHeSIS AND STRUCTURe OF DIHYDRATeS OF 2-SULFOQUINOLINATe AND 8-SULFOQUINOLINATe OF COPPeR

SYNTHESIS AND STRUCTURE OF DIHYDRATES OF 2-SULFOQUINOLINATE ...

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Sixteenth Congress of the International Union of Crystallography

作者： Yu.A.Bankovsky J.e.Lejejs e.J.Silina V.K.Belsky V.e.Zavodnik L.J.pech Institute of Inorganic Chemistry Latvian Academy of SciencesLatvia.

＜正＞The 2-sulfoquinolinate（Ⅰ） and 8-sulfoquinolinate（Ⅱ） of copper have been synthesized for the first time and studied by X-ray structural analysis.ⅠandⅡwere synthesized by mixing solutions of copper sulfate and the corresponding sulfonic acids. Crystal data:Ⅰ-a= 33.650（7）,b=7.700（1）,c= 15.315（2）A,β= 101.41（2）°,space group C2/c,Z = 8;Ⅱ- a = 7.642（1）,b = 9.048（1）,c = 30.466（3）A,γ=

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Beam steering application for W-band data links with moving targets in 5G wireless networks

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Journal of Communications and Information Networks 2017年第2期2卷 91-100页

作者： Alvaro Morales Sebastian Rodrguez Omar Gallardo Juan Jose Vegas Olmos idelfonso Tafur Monroy Technical University of Denmark Department of Photonics EngineeringOersteds PladsBuilding 343Kongens Lyngby 2800Denmarkl 2.Saint-Petersburg National Research University of Information TechnologiesMechanics and OpticsKronverksky prospektSaint Petersburg 197101Russian Federation

Abstract:Ubiquitous broadband Internet access is one of the major goals of the next generation of wireless ***,there are still some locations where this is diffcult to *** is the case on moving vehicles and,particularly,on *** the possible solutions to this problem,RoF(Radio-over-Fiber)architectures have been proposed as low-latency,cost-e ective *** elements are introduced to extend the RoF ***,the carrier frequency is raised into the W-band(75-110 GHz)to increase the available ***,a mechanical beam-steering solution based on a Stewart platform is adopted for the transmitter antenna to allow it to follow a moving receiver along a known path,thereby enhancing the coverage *** performance of a system transmitting a 2.5 Gbit/s non-return-to-zero signal generated by photonic up-conversion over a wireless link is evaluated in terms of real-time BeR(Bit error Rate)*** receiver is situated in di erent positions,and the orientation of the transmitter is changed *** below the forward error correction limit for 7%overhead are obtained over a range of 60 cm around a center point situated 2 m away from the transmitter.

关键词： 5G mobile communications mechanical steering millimeter-wave communications photonic up-conversion vehicular communications

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通过迭代3D影像重建提高CT透视影像质量和剂量管理

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国际医学放射学杂志 2017年第6期 731-732页

作者： O.S.Grosser C.Wybranski D.Kupitz M.Powerski K.Mohnike M.pech 宋瑞瑞 Department of Radiology and Nuclear Medicine University Hospital Magdeburg

摘要目的本研究的目的是评估迭代CT重建算法(IA)相较于滤过反投影(FBP)对CT透视(CTF)的影像噪声、阅片者信心和有效剂量的影响。方法纳入165例行胸、腹和盆腔

关键词：管电流 IA 有效剂量 FBP CT

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erratum to:Aqueous extracts from Tenebrio molitor larval and pupal stages inhibit early hepatocarcinogenesis in vivo

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2023年第4期24卷 371-372页

作者： Dulce María Moreno-García Armando Zepeda-Bastida Juan Ocampo-López Brisa Rodope Alarcón-Sánchez Osiris Germán idelfonso-García Sandra Rosas-Madrigal Diana Ivette Aparicio-Bautista Julio Isael Pérez-Carreón Saúl Villa-Treviño Jaime Arellanes-Robledo Laboratory of Liver Diseases National Institute of Genomic Medicine-INMEGENCDMX14610Mexico Institute of Agricultural Sciences Autonomous University of Hidalgo State-ICAP-UAEHHidalgo43600Mexico Department of Cell Biology Center for Research and Advanced Studies of the National Polytechnic Institute-CINVESTAV-IPNCDMX07360Mexico Laboratory of Cardiovascular Diseases National Institute of Genomic Medicine-INMEGENCDMX14610Mexico Proteomics Unit National Institute of Genomic Medicine-INMEGENCDMX14610Mexico Directorate of Cátedras National Council of Science and Technology-CONACYTCDMX03940Mexico

Following an Assessment by the Autonomous University of Hidalgo State and the National Institute of Genomic Medicine,this erratum corrects the authorship of this article by adding Dulce Maria MOReNO-GARCiA as the first *** published article(Zepeda-Bastida et al.,2021)has now been updated with the corrected authorship,author contributions,and acknowledgments,which may be seen in this erratum.

关键词： larval adding corrected

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应用表观扩散系数评估克罗恩病活动性的荟萃分析

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国际医学放射学杂志 2023年第3期 363-363页

作者： M.Thormann B.Melekh C.B?r M.pech J.Omari A.Wienke 吕律

摘要目的基于已发表的数据分析表观扩散系数（ADC）和克罗恩病活动性参数,如病变肠管长度及壁厚、C反应蛋白（CRP）、粪钙卫蛋白（FCP）、MR活动指数（MaRIA）、克

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