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Surface processing for iron-based degradable alloys:A preliminary study on the importance of acid pickling

Bioactive Materials 2022年第5期7卷 166-180页

作者： Leticia Marin de Andrade carlo paternoster Pascale Chevallier Sofia Gambaro Paolo Mengucci Diego Mantovani Laboratory for Biomaterials and Bioengineering Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in SurgeryDepartment of Min-Met-Materials EngineeringResearch Center of CHU de QuebecDivision of Regenerative MedicineLaval UniversityQuebec CityQCG1V 0A6Canada National Research Council Institute of Condensed Matter Chemistry and Technologies for Energy CNR-ICMATEGenoa16149Italy Polytechnic University of Marche Ancona60121Italy

The formation of a heterogeneous oxidized layer,also called scale,on metallic surfaces is widely recognized as a rapid manufacturing event for metals and their *** or total removal of the scale represents a mandatory integrated step for the industrial fabrication processes of medical *** biodegradable metals,acid pickling has already been reported as a preliminary surface preparation given further processes,such as ***,biodegradable medical prototypes presented discrepancies concerning acid pickling studies based on samples with less complex geometry(e.g.,non-uniform scale removal and rougher surface).Indeed,this translational knowledge lacks a detailed investigation on this process,deep characterization of treated surfaces properties,as well as a comprehensive discussion of the involved *** this study,the effects of different acidic media(HCl,HNO_(3),H_(3)PO_(4),CH_(3)COOH,H_(2)SO_(4) and HF),maintained at different temperatures(21 and 60℃)for various exposition time(15-240 s),on the chemical composition and surface properties of a Fe-13Mn-1.2C biodegradable alloy were *** in mass loss,morphology and wettability evidenced the combined effect of temperature and time for all *** in HCl and HF solutions favor mass loss(0.03-0.1 g/cm^(2))and effectively remove the initial scale.

关键词： Biodegradable metals Iron-based alloys Acid pickling Surface finishing Pre-treatment

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Effect of silver in thermal treatments of Fe-Mn-C degradable metals:Implications for stent processing

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Bioactive Materials 2022年第6期7卷 30-41页

作者： Sergio Loffredo Sofia Gambaro Francesco Copes carlo paternoster Nicolas Giguere Maurizio Vedani Diego Mantovani Laboratory for Biomaterials and Bioengineering Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in SurgeryDepartment of Min-Met-Materials EngineeringResearch Center of CHU de QuebecDivision of Regenerative MedicineLaval UniversityQuebec CityQC G1V 0A6Canada Department of Mechanical Engineering Politecnico di MilanoMilan20156Italy National Research Council Institute of Condensed Matter Chemistry and Technologies for Energy CNR-ICMATEGenoa16149Italy Quebec Metallurgy Center CMQ Trois-RivieresQCG9A 5E1Canada

Twinning-induced plasticity(TWIP)steels are considered excellent materials for manufacturing products requiring extremely high mechanical properties for various applications including thin medical devices,such as biodegradable intravascular *** is also proven that the addition of Ag can guarantee an appropriate degradation while implanted in human body without affecting its bioactive *** order to develop an optimized manufacturing process for thin stents,the effect of Ag on the recrystallization behavior of TWIP steels needs to be *** is of major importance since manufacturing stents involves several intermediate recrystallization annealing *** this work,the recrystallization mechanism of two Fe-Mn-C steels with and without Ag was thoroughly investigated by microstructural and mechanical *** was observed that Ag promoted a finer microstructure with a different texture evolution,while the recrystallization kinetics resulted *** presence of Ag also reduced the effectiveness of the recrystallization *** behavior was attributed to the presence of Ag-rich second phase particles,precipitation of carbides and to the preferential development of grains possessing a{111}orientation upon thermal *** prominence of{111}grains can also give rise to premature twinning,explaining the role of Ag in reducing the ductility of TWIP steels already observed in other ***,in vitro biological performances were unaffected by *** findings could allow the design of efficient treatments for supporting the transformation of Fe-Mn-C steels alloyed with Ag into commercial products.

关键词： Twinning Recrystallization Biomaterials Silver Steels

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Improving the radiopacity of Fe-Mn biodegradable metals by magnetron-sputtered W-Fe-Mn-C coatings:Application for thinner stents

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Bioactive Materials 2022年第6期7卷 64-70页

作者： Samira Ravanbakhsh carlo paternoster Gianni Barucca Paolo Mengucci Sofia Gambaro Theophraste Lescot Pascale Chevallier a Marc-Andre Fortin Diego Mantovani Laboratory for Biomaterials and Bioengineering Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in SurgeryDepartment of Min-Met-Materials EngineeringResearch Center of CHU de QuebecDivision of Regenerative MedicineLaval UniversityQuebec CityQuebec G1V 0A6Canada Laboratory for Biomaterials in Imaging(BIM) Axe Medecine RegeneratriceCentre Hospitalier Universitaire(CHU)de Quebec-Universite Laval2705boul.Laurier(T1-61a)QuebecG1V 4G2Canada Department of Materials Environmental Sciences and Urban PlanningUniversita Politecnica delle Marchevia Brecce Bianche 1260131AnconaItaly National Research Council Institute of Condensed Matter Chemistry and EnergyCNR-ICMATEVia de Marini 616149GenovaItaly Departement de Genie des Mines de la Metallurgie et des MateriauxCentre de Recherche sur les Materiaux Avances(CERMA)Universite LavalQuebecG1V 0A6Canada Axe Medecine Regeneratrice Centre Hospitalier Universitaire(CHU)de Quebec-Universite Laval2705boul.Laurier(T1-61a)QuebecG1V 4G2Canada

In this exploratory work,micrometric radiopaque W-Fe-Mn-C coatings were produced by magnetron sputtering plasma deposition,for the first time,with the aim to make very thin Fe-Mn stents trackable by *** power of Fe-13Mn-1.2C target was kept constant at 400 W while that of W target varied from 100 to 400 W producing three different coatings referred to as P100,P200,*** effect of the increased W power on coatings thickness,roughness,structure,corrosion behavior and radiopacity was *** coatings showed a power-dependent thickness and W concentration,different roughness values while a similar and uniform columnar *** amorphous phase was detected for both P100 and P200 coatings while γ-Fe,bcc-W and W_(3)C phases found for ***,P200 and P400 showed a significantly higher corrosion rate(CR)compared to *** presence of W,W_(3)C as well as the Fe amount variation determined two different micro-galvanic corrosion mechanisms significantly changing the CR of coatings,0.26±0.02,59.68±1.21 and 59.06±1.16μm/year for P100,P200 and P400,*** P200 with its most uniform morphology,lowest roughness(RMS=3.9±0.4 nm)and good radiopacity(~6%)appeared the most suitable radiopaque biodegradable coating investigated in this study.

关键词： Fe-Mn-Based alloys Degradable coatings W-Fe-Mn-C coatings Magnetron sputtering Radiopacity Stent fluoroscopy

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Experimental evaluation of mechanical compression of lattice trusses made with Ti6Al4V for aerospace use

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Chinese Journal of Aeronautics 2024年第5期37卷 520-532页

作者： carlo Giovanni FERRO Sara VARETTI Paolo MAGGIORE Department of Mechanical and Aerospace Engineering Politecnico di TorinoCorso Duca degli AbruzziTorino 10124Italy

Lattice structures are three-dimensional structures composed of repeated geometrical shapes with multiple interconnected nodes,providing high strength-to-weight ratios,customizable properties,and efficient use of materials.A smart use of materials leads to reduced fuel consumption and lower operating costs,making them highly desirable for aircraft ***,the customizable properties of lattice structures allow for tailoring to specific design requirements,leading to improved performance and safety for *** advantages make lattice structures an important focus for research and development in the aviation *** paper presents an experimental evaluation of the mechanical compression properties of lattice trusses made with Ti6Al4V,designed for use in an anti-ice *** truss structures were manufactured using additive manufacturing techniques and tested under compressive loads to determine mechanical *** showed that lattice trusses exhibited high levels of compressive strength,making them suitable for use in applications where mechanical resistance and durability are critical,such as in anti-ice *** also highlight the potential of additive manufacturing techniques for the fabrication of lattice trusses with tailored mechanical *** study provides valuable insights into the mechanical behavior of Ti6Al4V lattice trusses and their potential applications in anti-ice systems,as well as other areas where high strength-to-weight ratios are *** results of this research contribute to the development of lightweight,efficient,and durable anti-ice systems for use in aviation and other industries.

关键词： Additive Manufacturing(AM) Selective Laser Sintering(SLM) Anti ice systems Lattice structures Aircraft on board systems Design of Experiments(DOE)

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Witness for resolution: post-conflict quadratic affiliation in semi-free ranging pigs

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Current Zoology 2024年第2期70卷 233-243页

作者： Ivan Norscia Edoardo Collarini carlo Robino Elena Chierto Giada Cordoni Department of Life Sciences and Systems Biology University of TorinoVia Accademia Albertina 1310123 TorinoItaly Department of Public Health Sciences and Pediatric s University of TorinoC.So Galileo Galilei 2210126 TorinoItaly

In social mammals,post-conflict resolution can involve the reunion of former opponents(reconciliation),spontaneous/solicited post-conflict affliation of a third party with either opponent(triadic contacts),and affiliation between other individuals(hereafter bystanders;quadratic contacts).Quadratic contacts-possibly informing complex cognitive abilities-have been neglected in post-conflict *** investi-gated quadratic affliation in semi-free ranging pigs Sus scrofa,at the ethical farm Parva-Domus(Cavagnolo,Italy).Kinship was *** collected behavioral data on adult pigs(n=104)via video recordings(43 h)followed by video *** and anxiety behaviors between bystanders were collected under post-conflict(PC;following a conflict between non-bystanders)and matched-control(MC;no conflict)*** affiliation was present in pigs,as bystanders affliated more in PC than MC,and such affiliation was followed by a decrease in the anxiety behaviors of both the interacting ***,quadratic contacts may be partly aimed at reducing one's own anxiety(intrinsic regulation).Quadratic affiliation was highest between closely related bystanders,which suggests that such affiliation may be most effective when close kin is *** affiliation was lowest after reconciliation and spontaneous triadic *** suggests that direct peacemaking between opponents and spontaneous triadic contacts with close kin may most likely replace quadratic ***,pigs can be influenced by the negative events that affect other pigs-but not themselves-and their response may be modulated by social *** non-random quadratic affiliation may point toward the presence of elements of social appraisal abilities inpigs.

关键词： anxiety reduction emotional regulation reconciliation social appraisal triadic contacts.

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Introduction to the Special Issue on Recent Developments on Computational Biology-I

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 2261-2264页

作者： carlo Cattani Haci Mehmet Baskonus Armando Ciancio Engineering School(DEIM) University of TusciaViterbo01100Italy Department of Mathematics and Science Education Faculty of EducationHarran UniversitySanliurfa63190Turkey Universitàdegli Studi di Messina Dipartimento di Scienze BiomedicheOdontoiatriche e delle Immagini Morfologiche e FunzionaliMessina98122Italy

In modern time,experts started to use interdisciplinary properties with the development of technology and ***,these disciplines provide more sophisticated properties of real-world *** this sense,some models need to be investigated by using revised and modified traditional *** first discipline is the applied sciences such as physics,engineering,mechanics,electricity,biology,economy and mathematical applications[1-5].In this stage,many methods[5-10]are developed and *** uncover the deep properties of problems is to use the main properties of such interdisciplinary ***,works conducted on such mathematical models including non-local operators,partial,ordinary and integer order have introduced a deeper investigation of problems for *** using technological tools,expertsmay observe more realistic and exact results of models.

关键词： properties. integer operators

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Current status of magnetic resonance imaging radiomics in hepatocellular carcinoma:A quantitative review with Radiomics Quality Score

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World Journal of Gastroenterology 2024年第4期30卷 381-417页

作者： Valentina Brancato Marco Cerrone Nunzia Garbino Marco Salvatore carlo Cavaliere Department of Information Technology IRCCS SYNLAB SDNNaples 80143Italy Department of Radiology IRCCS SYNLAB SDNNaples 80143Italy

BACKGROUND Radiomics is a promising tool that may increase the value of magnetic resonance imaging(MRI)for different tasks related to the management of patients with hepatocellular carcinoma(HCC).However,its implementation in clinical practice is still far,with many issues related to the methodological quality of radiomic *** To systematically review the current status of MRI radiomic studies concerning HCC using the Radiomics Quality Score(RQS).METHODS A systematic literature search of PubMed,Google Scholar,and Web of Science databases was performed to identify original articles focusing on the use of MRI radiomics for HCC management published between 2017 and *** methodological quality of radiomic studies was assessed using the RQS ***’s correlation(ρ)analysis was performed to explore if RQS was correlated with journal metrics and characteristics of the *** level of statistical significance was set at P<*** One hundred and twenty-seven articles were included,of which 43 focused on HCC prognosis,39 on prediction of pathological findings,16 on prediction of the expression of molecular markers outcomes,18 had a diagnostic purpose,and 11 had multiple *** mean RQS was 8±6.22,and the corresponding percentage was 24.15%±15.25%(ranging from 0.0% to 58.33%).RQS was positively correlated with journal impact factor(IF;ρ=0.36,P=2.98×10^(-5)),5-years IF(ρ=0.33,P=1.56×10^(-4)),number of patients included in the study(ρ=0.51,P<9.37×10^(-10))and number of radiomics features extracted in the study(ρ=0.59,P<4.59×10^(-13)),and time of publication(ρ=-0.23,P<0.0072).CONCLUSION Although MRI radiomics in HCC represents a promising tool to develop adequate personalized treatment as a noninvasive approach in HCC patients,our study revealed that studies in this field still lack the quality required to allow its introduction into clinical practice.

关键词： Hepatocellular carcinoma Systematic review Magnetic resonance imaging Radiomics Radiomics quality score

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Breeding phase and outcome determine space use in European rollers Coracias garrulus prior to migration

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Current Zoology 2024年第2期70卷 137-149页

作者： Flavio Monti Sanja Barisic Sebastian Cannarella Davor Cikovic Vesna Tutis JelenaKralj carlo Catoni aUniversity of Siena Department of Physical SciencesEarth and EnvironmentVia Mattioli 453100 SienaItaly Institute of Ornithology Croatian Academy of Sciences and ArtsGunduliceva 24HR-1000 ZagrebCroatia Ornis italica Piazza Crati 1500199 RomeItaly

The breeding period is a demanding and time-constrained phase for migratory bird *** outcome and duration can interact with the extent and duration of post-breeding movements,resulting in individual differences in space use ultimately influencing later stages of the annual *** present space-use and home range estimates during the breeding season for 21 European rollers Coracias garrulus tracked between 2018 and 2022,in Italy and *** high-resolution spatial GPS data coupled with regular nest-box monitoring,we analyzed dif-ferences in space use during the incubation/nestling period versus post-breeding period prior to migration,accounting for the breeding outcome(successful ***).We found that adult movements were strongly reduced during the first phase,whereas increased in the post-breeding phase,especially for failed *** breeders remained in the surroundings of the nest site,whereas unsuccessful ones tended to abandon the nest and visit distant areas(up to 500 km)for long periods(60.5±6.2 days).Breeding outcome did not influence the departure date of autumn migration,suggesting that failed breeders used this period for exploratory movements but not for advancing the onset of *** exploratory movements may be functional to prospect and inform settlement decisions in failed breeders in search of new breeding opportunities and may be particularly important in migratory species,which generally have a limited period to gather information prior to autumn *** study demonstrates the need to investigate seasonal movements in different populations and the potential importance of pros-pectingpost-breeding movements for long-distance migratory species.

关键词： animal movement biologging conservation Coracidae Mediterranean nest-box population monitoring prospecting movements reproduction.

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Local recurrence rate as quality indicator in surgery for pancreatic cancer?

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Hepatobiliary & Pancreatic Diseases International 2024年第5期23卷 548-550页

作者： carlo Alberto Pacilio Alessandro Cucchetti Giorgio Ercolani General and Oncologic Surgery Unit Morgagni-Pierantoni HospitalAUSL RomagnaVia Carlo Forlanini 3447121ForlìItaly Department of Medical and Surgical Sciences Alma Mater StudiorumUniversity of BolognaVia Massarenti 940138BolognaItaly

To the Editor: As we all know, even with the current advancements regarding novel chemotherapy regimens, patients affected by pancreatic cancer(PC) have an extremely dismal prognosis(5-year survival rate 12% for all stages in the National Cancer Institute SEER database). Among the patients undergoing surgical treatment, the prognosis is mostly affected by recurrence. PC after surgery has mainly four patterns of recurrence, isolated or variously associated with each other: local, lymph nodal, peritoneal or distant(liver, lung, other sites).

关键词： surgery prognosis cancer

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Metal-Halide Perovskite Submicrometer-Thick Films for Ultra-Stable Self-Powered Direct X-Ray Detectors

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Nano-Micro Letters 2024年第9期16卷 410-431页

作者： Marco Girolami Fabio Matteocci Sara Pettinato Valerio Serpente Eleonora Bolli Barbara Paci Amanda Generosi Stefano Salvatori Aldo Di carlo Daniele M.Trucchi CNR‑ISM Consiglio Nazionale delle RicercheIstituto di Struttura della MateriaSede Secondaria di MontelibrettiDiaTHEMA LabStrada Provinciale 35D900010 MontelibrettiRomeItaly CHOSE–Centre for Hybrid and Organic Solar Energy Department of Electronic EngineeringUniversity of Rome“Tor Vergata”Via del Politecnico 100133 RomeItaly Faculty of Engineering Universita degli Studi Niccolo CusanoVia don Carlo Gnocchi 300166 RomeItaly SpecXLab CNR‑ISMConsiglio Nazionale Delle RicercheIstituto di Struttura Della MateriaArea della Ricerca di Tor VergataVia del Fosso del Cavaliere 10000133 RomeItaly

Metal-halide perovskites are revolutionizing the world of X-ray detectors,due to the development of sensitive,fast,and cost-effective ***-powered operation,ensuring portability and low power consumption,has also been recently demonstrated in both bulk materials and thin ***,the signal stability and repeatability under continuous X-ray exposure has only been tested up to a few hours,often reporting degradation of the detection *** it is shown that self-powered direct X-ray detectors,fabricated starting from a FAPbBr_(3)submicrometer-thick film deposition onto a mesoporous TiO_(2)scaffold,can withstand a 26-day uninterrupted X-ray exposure with negligible signal loss,demonstrating ultra-high operational stability and excellent *** structural modification is observed after irradiation with a total ionizing dose of almost 200 Gy,revealing an unexpectedly high radiation hardness for a metal-halide perovskite thin *** addition,trap-assisted photoconductive gain enabled the device to achieve a record bulk sensitivity of 7.28 C Gy^(−1)cm^(−3)at 0 V,an unprecedented value in the field of thin-film-based photoconductors and photodiodes for“hard”***,prototypal validation under the X-ray beam produced by a medical linear accelerator for cancer treatment is also introduced.

关键词： Metal-halide perovskite thin films Direct X-ray detectors Self-powered devices Operational stability Medical linear accelerator

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