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Journal of Energy Chemistry 2019年第8期28卷 168-173,I0006页

作者： Irene Gatto Ada Sacca Vincenzo Baglio Antonino salvatore Arico Claudio Oldani Luca Merlo Alessandra Carbone CNR-ITAE Institute for Advanced Energy Technologies"N. Giordano" Via S. Lucia Sopra Contesse 5Messina Italy Solvay Specialty Polymers Viale Lombardia 20 20021 Bollate MI Italy

The membrane-electrodes assembly(MEA) is the core of the Polymer Electrolyte Fuel Cell(PEFC). It consists of a membrane, catalytic(CL) and gas diffusion layers(GDL). In order to manufacture MEAs with suitable performance, a hot-pressing procedure is generally used. The relevant parameters are the temperature, pressure and time of hot-pressing. Such variables need to be adjusted as a function of the type of ionomer used in the catalytic layer and membrane. In this study, an evaluation of the temperature of hot-pressing was carried out and its influence on MEA electrochemical performance was assessed. In particular, preparation trials of MEAs were carried out with reinforced experimental membranes based on Aquivion^■ short-side-chain PFSA(by Solvay Specialty Polymers). The membranes were coupled to gas diffusion electrodes, and MEAs were manufactured using different temperatures for the hot-pressing procedure in order to evaluate their influence on the electrochemical performance of PEFCs, in the temperature range of 80–95 °C, with low relative humidity of the reactant gases. The electrochemical performance of the prepared MEAs was tested in a H2/Air 25 cm^2 single cell in terms of polarization curves and accelerated stress test(AST).

关键词： Aquivion^(■) Short-side chain PEFC Hot-pressing parameters Automotive applications

Synthesis,microstructure,and properties of high purity Mo_(2)TiAlC_(2) ceramics fabricated by spark plasma sintering

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Journal of Advanced Ceramics 2020年第6期9卷 759-768页

作者： Yunhui NIU Shuai FU Kuibao ZHANG Bo DAI Haibin ZHANG salvatore GRASSO Chunfeng HU State Key Laboratory of Environment-Friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China

The synthesis,microstructure,and properties of high purity dense bulk Mo_(2)TiAlC_(2) ceramics were *** purity Mo_(2)TiAlC_(2) powder was synthesized at 1873 K starting from Mo,Ti,Al,and graphite powders with a molar ratio of 2:1:1.25:*** synthesis mechanism of Mo_(2)TiAlC_(2) was explored by analyzing the compositions of samples sintered at different *** was found that the Mo_(2)TiAlC_(2) phase was formed from the reaction among Mo3Al2C,Mo2C,TiC,and *** Mo_(2)TiAlC_(2) bulk sample was prepared by spark plasma sintering(SPS)at 1673 K under a pressure of 40 *** relative density of the dense sample was 98.3%.The mean grain size was 3.5μm in length and 1.5μm in *** typical layered structure could be clearly *** electrical conductivity of Mo_(2)TiAlC_(2) ceramic measured at the temperature range of 2-300 K decreased from 0.95×10^(6) to 0.77×10^(6)Ω^(-1)·m^(-1).Thermal conductivity measured at the temperature range of 300-1273 K decreased from 8.0 to 6.4 W·(m·K)^(-1).The thermal expansion coefficient(TEC)of Mo_(2)TiAlC_(2) measured at the temperature of 350-1100 K was calculated as 9.0×10^(-6) K^(-1).Additionally,the layered structure and fine grain size benefited for excellent mechanical properties of low intrinsic Vickers hardness of 5.2 GPa,high flexural strength of 407.9 MPa,high fracture toughness of 6.5 MPa·m^(1/2),and high compressive strength of 1079 *** at the indentation load of 300 N,the residual flexural strength could hold 84% of the value of undamaged one,indicating remarkable damage ***,it was confirmed that Mo_(2)TiAlC_(2) ceramic had a good oxidation resistance below 1200 K in the air.

关键词： MAX phase Mo_(2)TiAlC_(2) synthesis microstructure properties

Microscopic theory of exciton and trion polaritons in doped monolayers of transition metal dichalcogenides

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npj Computational Materials 2022年第1期8卷 891-900页

作者： Yaroslav Vladimirovich Zhumagulov salvatore Chiavazzo Dmitry Romanovich Gulevich Vasili Perebeinos Ivan Andreevich Shelykh Oleksandr Kyriienko University of Regensburg Regensburg93040Germany Department of Physics and Engineering ITMO UniversitySt.Petersburg197101Russia Department of Physics and Astronomy University of ExeterStocker RoadExeterEX44QLUnited Kingdom Department of Electrical Engineering University at BuffaloThe State University of New YorkBuffaloNY14260USA Science Institute University of IcelandDunhagi-3IS-107ReykjavikIceland

We study a doped transition metal dichalcogenide (TMDC) monolayer in an optical *** the microscopic theory,we simulate spectra of quasiparticles emerging due to the interaction of material excitations and a high-finesse optical mode,providing a comprehensive analysis of optical spectra as a function of Fermi energy and predicting several modes in the strong light-matter coupling *** addition to exciton-polaritons and trion-polaritons,we report polaritonic modes that become bright due to the interaction of excitons with free *** large doping,we reveal strongly coupled modes corresponding to excited trions that hybridize with a cavity *** also demonstrate that the increase of carrier concentration can change the nature of the system’s ground state from the dark to the bright *** results offer a unified description of polaritonic modes in a wide range of free electron densities.

关键词： polar transition theory

Imaging in liver transplantation

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World Journal of Gastroenterology 2009年第6期15卷 675-683页

作者： Settimo Caruso Roberto Miraglia Luigi Maruzzelli salvatore Gruttadauria Angelo Luca Bruno Gridelli Department of Diagnostic and Interventional Radiology Mediterranean Institute for Transplantation and Advanced Specialized Therapies(IsMeTT)University of Pittsburgh Medical Center ItalyVia Tricomi 1Palermo 90127Italy Department of Transplantation Surgery Mediterranean Institute for Transplantation and Advanced Specialized Therapies(IsMeTT) University of Pittsburgh Medical Center ItalyVia Tricomi 1 Palermo 90127Italy

The aim of this study was to illustrate the role of noninvasive imaging tools such as ultrasonography,multidetector row computed tomography,and magnetic resonance imaging in the evaluation of pediatric and adult liver recipients and potential liver donors,and in the detection of potential complications arising from liver transplantation.

关键词：肝移植肝供体并发症核磁共振

STARD1:a new rising StAR in cholesterol-mediated hepatocarcinogenesis

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Hepatobiliary Surgery and Nutrition 2021年第6期10卷 910-912页

作者： salvatore Papa Concetta Bubici Wing-Kin Syn Leeds Institute of Medical Research at St.James’ Faculty of Medicine and HealthUniversity of LeedsSt.James’University HospitalLeedsUK Centre for Genome Engineering and Maintenance Department of Life SciencesCollege of HealthMedicine and Life SciencesBrunel University LondonUxbridgeUK Division of Gastroenterology and Hepatology Medical University of South CarolinaCharlestonSCUSA Section of Gastroenterology Ralph H.Johnson Veterans Affairs Medical CenterCharlestonSCUSA Department of Physiology Faculty of Medicine and NursingUniversity of the Basque CountryUniversidad del Pais Vasco/Euskal Herriko Unibertsitatea(UPV/EHU)LeioaSpain

Having cholesterol in our body is essential for living healthy,but too much can lead to serious health problems,including-but not limited to-heart attacks and strokes(1).Indeed,accumulating evidence points to cholesterol as a cancer risk factor especially in colon,rectal,prostatic and testicular cancer(2).Cholesterol is the most abundant sterol in animal tissues with many important functions that spans from simply maintaining cell membrane physical properties to the production of bile acids and biosynthesis of steroid *** the most part,cholesterol is synthetised de novo in the liver,but some is obtained from dietary *** synthesis of cholesterol takes place in the cytoplasm and the endoplasmic reticulum(ER)of hepatocytes(the major liver cell types)and starts with one molecule of acetyl-CoA.

关键词： cholesterol intake cancer

The impact of Pinus halepensis afforestation on Mediterranean spontaneous vegetation:do soil treatment and canopy cover matter?

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Journal of Forestry Research 2012年第4期23卷 517-528页

作者： Pasta salvatore Tommaso La Mantia Juliane Rühl Dipartimento DEMETRA Università di PalermoViale delle ScienzeEd.4Ingr H90128 PalermoItaly.

We investigated central Mediterranean Pinus halepensis plantations under semi-arid climate in order to evaluate the combined effect of soil treatment and afforestation practices on spontaneous plant species composition, richness and evenness, and on the trend and speed of vegetation dynamics. Phytosociological releves of three different plot typologies, i.e. （1） soil-treatment and plantation, （2） only soil-treatment, （3） no soil-treatment and no plantation, were compared by （a） multivari- ate analysis and （b） with reference to species richness and evenness. Moreover, in order to compare vegetation dynamics within the planta- tions with those ones ongoing in semi-natural garrigue communities, we compared life form and syntaxonomic spectra between phytosociological relev6s taken at 8 years of distance. DCA showed that floristic species composition and similarity are influenced by the canopy cover of Pine trees as well as by soil-treatment practices. Although species richness and evenness are not clearly related to neither soil treatment nor Pine afforestation, canopy cover clearly plays a major role： in fact, the highest Ph cover rates correspond to the lowest values of understory species richness. This is true also if only species of biogeographical/conservation interest are considered. Regarding vegetation dynamics, sites with dense Pine canopy cover evolve much slower than the adjacent garrigue communities. The same factors invoqued to explain the patterns of floristic composition and similarity （i.e. allelopathy and competition for light, water and nutrients） may also explain the lowering of diversity of therophytes and the strong decline of the cover perfomed by both therophytes and hemicryptophytes underneath the canopy of dense Ph plantations. Thus, in sites where Ph cover exceeds about 80%, thinning is recommended not only in order to accelerate succession, but also to give a natural ＇shape＇ to afforestations.

关键词： plant diversity understory vegetation dynamics plantation

Acorn size and tolerance to seed predators:the multiple roles of acorns as food for seed predators,fruit for dispersal and fuel for growth

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Integrative Zoology 2018年第3期13卷 251-266页

作者： Andrew W.BARTLOW salvatore JAGOSTA Rachel CURTIS Xianfeng YI Michael ASTEELE Department of Biology and The WIESS Institute for Environmental Science and Sustainability Wilkes UniversityWilkes BarrePennsylvaniaUSA Present address:Department of Biology University of UtahSalt Lake CityUtahUSA Center for Environmental Studies and Department of Biology Virginia Commonwealth UniversityRichmondVirginiaUSA Present address:Department of Veterinary Integrative Biosciences Texas A&M UniversityCollege StationTexasUSA College of Life Sciences Jiangxi Normal UniversityNanchangJiangxiChina.

Fitness of parents and offspring is affected by offspring *** oaks(Quercus spp.),acorns vary considerably in size across,and within,*** size influences dispersal and establishment of oaks,but it is not known whether size imparts tolerance to seed ***,we examine the relative extent to which cotyledon size serves as both a means for sustaining partial consumption and energy reserves for developing seedlings during early stages of *** of 6 oak species were damaged to simulate acorn predation by vertebrate and invertebrate seed *** germination/emergence and growth rates were used to assess seedling *** predicted that if cotyledons are important for dispersal,acorns should show tolerance to partial seed ***,if the cotyledon functions primarily as an energy reserve,damage should significantly influence seedling *** of each species germinated and produced seedlings even after removing>50%of the *** mass explained only some of the variation in *** species,larger acorns performed better than smaller acorns when *** acorns performed as well or better than damaged *** was no pattern among individual species with increasing amounts of *** some species,simulated invertebrate damage resulted in the poorest performance,suggesting alternative strategies of oaks to sustain *** cotyledons in acorns may be important for attracting seed dispersers and sustaining partial damage,while also providing energy to young *** of oak establishment may follow from the resilience of acorns to sustain damage at an early stage.

关键词： acorns damage tolerance dispersal Quercus seed size

A multi-agent system for itinerary suggestion in smart environments

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CAAI Transactions on Intelligence Technology 2021年第4期6卷 377-393页

作者： Alessandra De Paola salvatore Gaglio Andrea Giammanco Giuseppe Lo Re Marco Morana Universita degzi studi di Palermo PalermoItaly Srart Cities and Comtnunitics Natioral Jab CINI-Consorzio Interuniversitario Nazionale per l'Infortnatica PalerinoItaly

Modem smart environments pose several challenges,among which the design of intelligent algorithms aimed to assist the *** a variety of points of interest are available,for instance,trajectory recommendations are needed to suggest users the most suitable itineraries based on their interests and contextual *** in many cases,these interests must be explicitly requested and their lack causes the so-called cold-start ***,lengthy travelling distances and excessive crowdedness of specific points of interest make itinerary planning more *** address these aspects,a multi-agent itinerary suggestion system that aims at assisting the users in an online and collaborative way is proposed.A profiling agent is responsible for the detection of groups of users whose movements are characterised by similar semantic,spatial and temporal features;then,a recommendation agent leverages contextual information and dynamically associates the current user with the trajectory clusters according to a Multi-Armed Bandit policy;Framing the trajectory recommendation as a reinforcement learning problem permits to provide high-quality suggestions while avoiding both cold-start and preference elicitation *** effectiveness of the approach is demonstrated by some deployments in real-life scenarios,such as smart campuses and theme parks.

关键词： artificial intelligence pattern recognition

Unmet needs in preoperative biliary stenting for patient candidates for pancreaticoduodenectomy: a viewpoint

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Hepatobiliary Surgery and Nutrition 2019年第4期8卷 426-427页

作者： salvatore Paiella Matteo De Pastena Roberto Salvia General and Pancreatic Surgery Unit Pancreas Institute University of Verona Verona Italy

We read with great interest the article published in Annals of Surgery, "Preoperative Biliary Stenting and Major Morbidity After Pancreatoduodenectomy: Does Elapsed Time Matter? The FRAGERITA Study Group" (1). The timing of preoperative biliary stenting (PBS) and its impact on postoperative outcomes after pancreaticoduodenectomy (PD) are ever-burning issues for pancreatologists dealing with jaundice due to periampullary tumors.

关键词： Surgery preoperative stent

Contrast-enhanced sonography versus biopsy for the differential diagnosis of thrombosis in hepatocellular carcinoma patients

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World Journal of Gastroenterology 2009年第18期15卷 2245-2251页

作者： Paolo Sorrentino salvatore D'Angelo Luciano Tarantino Umberto Ferbo Alessandra Bracigliano Raffaela Vecchione Liver Unit Clinical and Experimental HepatologyDepartment of Internal MedicineS.G.Moscati Hospital83100 AvellinoItaly Department of Biomorphological Science University of Naples Federico Ⅱ80131 NaplesItaly Hepatology and Interventional Ultrasound Unit S.Giovanni di Dio HospitalASL 380027 FrattamaggioreNaplesItaly Institute of Pathology S.G.Moscati Hospital83100 AvellinoItaly

AIM:To clarify which method has accuracy:2nd gen-eration contrast-enhanced ultrasound or biopsy of portal vein thrombus in the differential diagnosis of portal vein ***:One hundred and eighty-six patients with hepatocellular carcinoma and portal vein thrombosis underwent in blinded fashion a 2nd generation contrast-enhanced ultrasound and biopsy of portal vein thrombus;both results were examined on the basis of the follow-up of patients compared to ***:One hundred and eight patients completed the *** thrombosis on 2nd generation contrast-enhanced ultrasound was characterised by progressive hypoenhancing of the thrombus;in malignant portal vein thrombosis there was a precocious homo-geneous enhancement of the *** follow-up there were 50 of 108 patients with benign thrombosis:all were correctly diagnosed by both *** were 58 of 108 patients with malignant thrombosis:amongst these,52 were correctly diagnosed by both methods,the remainder did not present malignant cells on portal vein thrombus biopsy and showed on 2nd generation contrast-enhanced ultrasound an inho-mogeneous enhancement pattern.A new biopsy during the follow-up,guided to the area of thrombus that showed up on 2nd generation contrast-enhanced ultra-sound,demonstrated an enhancing pattern indicating malignant ***:In patients with hepatocellular carcinoma complicated by portal vein thrombosis,2nd generation contrast-enhanced ultrasound of portal vein thrombus is very useful in assessing the benign or malignant nature of the *** biopsy of thrombus is usually accurate but presents some sampling errors,so,when pathological results are required,2nd generation contrast-enhanced ultrasound could guide the sampling needle to the correct area of the thrombus.

关键词：门静脉血栓形成超声造影穿刺活检鉴别诊断肝癌患者对比增强恶性肿瘤恶性细胞